blob: 4bf3d97cc5a094da598789ad58f05d92e10c3929 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
Trond Myklebust652f89f2011-12-09 19:05:58 -050042#include <linux/ratelimit.h>
43#include <linux/printk.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090044#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
Bryan Schumaker9b7160c2011-04-13 14:31:30 -040050#include <linux/nfs_mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/namei.h>
Trond Myklebust02a913a2005-10-18 14:20:17 -070052#include <linux/mount.h>
Benny Halevy99fe60d2009-04-01 09:22:29 -040053#include <linux/module.h>
Trond Myklebust6926afd2012-01-07 13:22:46 -050054#include <linux/nfs_idmap.h>
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +000055#include <linux/xattr.h>
Andy Adamsonc7a360b2011-01-25 19:15:32 -050056#include <linux/utsname.h>
Jeff Laytond3103102011-12-01 22:44:39 +010057#include <linux/freezer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Trond Myklebust4ce79712005-06-22 17:16:21 +000059#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include "delegation.h"
Trond Myklebust101070c2008-02-19 20:04:23 -050061#include "internal.h"
Chuck Lever006ea732006-03-20 13:44:14 -050062#include "iostat.h"
Andy Adamsonfc931582009-04-01 09:22:31 -040063#include "callback.h"
Andy Adamsonb1f69b72010-10-20 00:18:03 -040064#include "pnfs.h"
Chuck Leverf0920752012-05-21 22:45:41 -040065#include "netns.h"
Trond Myklebust73e39aa2012-11-26 12:49:34 -050066#include "nfs4session.h"
David Howellsde242c02012-12-20 21:52:38 +000067#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Trond Myklebustc6d01c62013-08-09 11:51:26 -040069#include "nfs4trace.h"
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#define NFSDBG_FACILITY NFSDBG_PROC
72
Trond Myklebust2066fe82006-09-15 08:30:46 -040073#define NFS4_POLL_RETRY_MIN (HZ/10)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#define NFS4_POLL_RETRY_MAX (15*HZ)
75
Trond Myklebustcdd4e682006-01-03 09:55:12 +010076struct nfs4_opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +010077static int _nfs4_proc_open(struct nfs4_opendata *data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -080078static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
Trond Myklebust9e33bed2008-12-23 15:21:46 -050080static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
Chuck Lever81934dd2012-03-01 17:01:57 -050081static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
David Quigley1775fd32013-05-22 12:50:42 -040082static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
Trond Myklebust0ab64e02010-04-16 16:22:51 -040084static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -040086 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
Bryan Schumakerf062eb62011-06-02 14:59:10 -040088#ifdef CONFIG_NFS_V4_1
Trond Myklebustab7cb0d2013-05-20 11:20:27 -040089static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
Bryan Schumakerf062eb62011-06-02 14:59:10 -040093#endif
David Quigleyaa9c2662013-05-22 12:50:44 -040094
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
David Quigleyaa9c2662013-05-22 12:50:44 -0400108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141/* Prevent leaks of NFSv4 errors into userland */
WANG Cong46f72f52008-12-30 16:35:55 -0500142static int nfs4_map_errors(int err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Trond Myklebust52567b02009-10-23 14:46:42 -0400144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
Weston Andros Adamson30005122013-02-28 20:30:10 -0500148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
Trond Myklebust52567b02009-10-23 14:46:42 -0400150 return -EREMOTEIO;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +0000151 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson88975382013-08-13 16:37:38 -0400152 case -NFS4ERR_WRONG_CRED:
Bryan Schumaker7ebb9312011-03-24 17:12:30 +0000153 return -EPERM;
Trond Myklebust3ddeb7c2011-02-22 15:44:31 -0800154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
Trond Myklebustfb13bfa2012-05-28 11:36:28 -0400157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
Steve Dicksonf25efd82012-06-06 14:12:07 -0400159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
Weston Andros Adamson6168f622012-09-10 14:00:46 -0400161 case -NFS4ERR_ACCESS:
162 return -EACCES;
Trond Myklebust6e3cf242013-03-23 15:22:45 -0400163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
Trond Myklebust52567b02009-10-23 14:46:42 -0400165 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 dprintk("%s could not handle NFSv4 error %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700167 __func__, -err);
Trond Myklebust52567b02009-10-23 14:46:42 -0400168 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 }
Trond Myklebust52567b02009-10-23 14:46:42 -0400170 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
Trond Myklebust1549210f2012-06-05 09:16:47 -0400176const u32 nfs4_fattr_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
David Quigleyaa9c2662013-05-22 12:50:44 -0400190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194};
195
Trond Myklebust1549210f2012-06-05 09:16:47 -0400196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
Andy Adamsone23008e2012-10-02 21:07:32 -0400214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
David Quigleya09df2c2013-05-22 12:50:41 -0400220const u32 nfs4_statfs_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
David Quigleya09df2c2013-05-22 12:50:41 -0400229const u32 nfs4_pathconf_bitmap[3] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
Fred Isamandae100c2011-07-30 20:52:37 -0400235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
Ricardo Labiaga55b6e772010-10-12 16:30:06 -0700239 FATTR4_WORD1_TIME_DELTA
Fred Isamandae100c2011-07-30 20:52:37 -0400240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242};
243
David Quigleya09df2c2013-05-22 12:50:41 -0400244const u32 nfs4_fs_locations_bitmap[3] = {
Manoj Naik830b8e32006-06-09 09:34:25 -0400245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
David Quigleya09df2c2013-05-22 12:50:41 -0400260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
Manoj Naik830b8e32006-06-09 09:34:25 -0400261};
262
Al Virobc4785c2006-10-19 23:28:51 -0700263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct nfs4_readdir_arg *readdir)
265{
Al Viro0dbb4c62006-10-19 23:28:49 -0700266 __be32 *start, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 if (cookie > 2) {
Adrian Bunkb7ef1952005-06-22 17:16:28 +0000269 readdir->cookie = cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
Cong Wang2b86ce22011-11-25 23:14:33 +0800286 start = p = kmap_atomic(*readdir->pages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
Peter Staubach4e769b92007-08-03 15:07:10 -0400310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
Cong Wang2b86ce22011-11-25 23:14:33 +0800314 kunmap_atomic(start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
Trond Myklebust65de8722008-12-23 15:21:44 -0500317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
Colin Cross416ad3c2013-05-06 23:50:06 +0000327 freezable_schedule_timeout_killable_unsafe(*timeout);
Trond Myklebust65de8722008-12-23 15:21:44 -0500328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
Trond Myklebustb064eca22011-02-22 15:44:32 -0800337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
Trond Myklebust65de8722008-12-23 15:21:44 -0500338{
339 struct nfs_client *clp = server->nfs_client;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500340 struct nfs4_state *state = exception->state;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500341 struct inode *inode = exception->inode;
Trond Myklebust65de8722008-12-23 15:21:44 -0500342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500348 case -NFS4ERR_OPENMODE:
Bryan Schumaker011e2a72012-06-20 15:53:43 -0400349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
Bryan Schumaker57ec14c2012-06-20 15:53:44 -0400350 nfs4_inode_return_delegation(inode);
Trond Myklebust3114ea72012-03-07 16:39:06 -0500351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
Trond Myklebust3114ea72012-03-07 16:39:06 -0500359 goto wait_on_recovery;
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -0500360 case -NFS4ERR_DELEG_REVOKED:
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
Trond Myklebustb570a972013-04-12 15:04:51 -0400363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500368 if (state == NULL)
369 break;
Trond Myklebust5d422302013-03-14 16:57:48 -0400370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500373 goto wait_on_recovery;
Trond Myklebust0ced63d2011-05-26 14:26:35 -0400374 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -0400375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500380 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500381 case -NFS4ERR_STALE_CLIENTID:
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
Chuck Lever519ae252013-10-17 14:13:19 -0400384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -0400389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500392#if defined(CONFIG_NFS_V4_1)
Andy Adamson4745e312009-04-01 09:22:42 -0400393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
Trond Myklebust9f594792012-05-27 13:02:53 -0400402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
Bryan Schumaker399f11c2012-10-30 16:06:35 -0400403 goto wait_on_recovery;
Trond Myklebust03391692010-01-26 15:42:38 -0500404#endif /* defined(CONFIG_NFS_V4_1) */
Trond Myklebust65de8722008-12-23 15:21:44 -0500405 case -NFS4ERR_FILE_OPEN:
NeilBrown44ed3552009-12-03 15:58:56 -0500406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
Andy Adamsona8a4ae32011-05-03 13:43:03 -0400418 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebust65de8722008-12-23 15:21:44 -0500419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
Trond Myklebustb064eca22011-02-22 15:44:32 -0800421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
Trond Myklebust65de8722008-12-23 15:21:44 -0500434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500437wait_on_recovery:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500438 ret = nfs4_wait_clnt_recover(clp);
Chuck Lever519ae252013-10-17 14:13:19 -0400439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -0500441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
Trond Myklebust65de8722008-12-23 15:21:44 -0500444}
445
Weston Andros Adamsona5250de2013-09-03 15:18:49 -0400446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
Trond Myklebust65de8722008-12-23 15:21:44 -0500460
Trond Myklebust452e9352010-07-31 14:29:06 -0400461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
Trond Myklebust452e9352010-07-31 14:29:06 -0400469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
Chuck Levera9c92d62013-08-09 12:48:18 -0400480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
Chuck Lever3bd23842013-08-09 12:49:19 -0400495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
Trond Myklebustcab92c12014-01-29 12:12:15 -0500542 if (slot == NULL)
Chuck Lever3bd23842013-08-09 12:49:19 -0400543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400556#if defined(CONFIG_NFS_V4_1)
557
Trond Myklebustd185a332010-06-16 09:52:25 -0400558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
Andy Adamson13615872009-04-01 09:22:17 -0400559{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500560 struct nfs4_session *session;
Andy Adamson13615872009-04-01 09:22:17 -0400561 struct nfs4_slot_table *tbl;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500562 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500563 bool send_new_highest_used_slotid = false;
Andy Adamson13615872009-04-01 09:22:17 -0400564
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500565 tbl = slot->table;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500566 session = tbl->session;
Andy Adamsonea028ac2009-12-04 15:55:38 -0500567
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500568 spin_lock(&tbl->slot_tbl_lock);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500579 nfs4_free_slot(tbl, slot);
Trond Myklebustc10e4492012-11-26 16:16:54 -0500580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500583out_unlock:
Trond Myklebust35dc1d72009-12-05 19:32:19 -0500584 spin_unlock(&tbl->slot_tbl_lock);
Benny Halevydfb4f3092010-09-24 09:17:01 -0400585 res->sr_slot = NULL;
Trond Myklebustc10e4492012-11-26 16:16:54 -0500586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
Andy Adamson13615872009-04-01 09:22:17 -0400588}
589
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
Andy Adamsonb0df8062009-04-01 09:22:18 -0400591{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500592 struct nfs4_session *session;
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500593 struct nfs4_slot *slot = res->sr_slot;
Trond Myklebust14516c32010-07-31 14:29:06 -0400594 struct nfs_client *clp;
Trond Myklebustac20d162012-12-15 15:36:07 -0500595 bool interrupted = false;
Trond Myklebust85563072012-12-11 10:31:12 -0500596 int ret = 1;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400597
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500598 if (slot == NULL)
599 goto out_noaction;
Bryan Schumaker468f8612011-04-18 15:57:32 -0400600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
Andy Adamsonb0df8062009-04-01 09:22:18 -0400602 goto out;
603
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500604 session = slot->table->session;
Trond Myklebust933602e2012-11-16 12:12:38 -0500605
Trond Myklebustac20d162012-12-15 15:36:07 -0500606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400611 trace_nfs4_sequence_done(session, res);
Andy Adamson691daf32009-12-04 15:55:39 -0500612 /* Check the SEQUENCE operation status */
Trond Myklebust14516c32010-07-31 14:29:06 -0400613 switch (res->sr_status) {
614 case 0:
Andy Adamsonb0df8062009-04-01 09:22:18 -0400615 /* Update the slot's sequence and clientid lease timer */
Trond Myklebust933602e2012-11-16 12:12:38 -0500616 ++slot->seq_nr;
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500617 clp = session->clp;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500618 do_renew_lease(clp, res->sr_timestamp);
Alexandros Batsakis0629e372009-12-05 13:46:14 -0500619 /* Check sequence flags */
Trond Myklebustb4410c22011-03-09 16:00:55 -0500620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
Trond Myklebust464ee9f2012-11-20 12:49:27 -0500622 nfs41_update_target_slotid(slot->table, slot, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400623 break;
Trond Myklebustac20d162012-12-15 15:36:07 -0500624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400639 __func__,
Trond Myklebustdf2fabf2012-11-16 12:45:06 -0500640 slot->slot_nr,
Trond Myklebust933602e2012-11-16 12:12:38 -0500641 slot->seq_nr);
Trond Myklebust14516c32010-07-31 14:29:06 -0400642 goto out_retry;
Trond Myklebust85563072012-12-11 10:31:12 -0500643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
Trond Myklebuste8794442012-12-15 13:56:18 -0500648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
650 /*
Trond Myklebustac20d162012-12-15 15:36:07 -0500651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
658 /*
Trond Myklebuste8794442012-12-15 13:56:18 -0500659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
Trond Myklebuste8794442012-12-15 13:56:18 -0500667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
Trond Myklebust14516c32010-07-31 14:29:06 -0400670 default:
671 /* Just update the slot sequence no. */
Trond Myklebust933602e2012-11-16 12:12:38 -0500672 ++slot->seq_nr;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
Trond Myklebustd185a332010-06-16 09:52:25 -0400677 nfs41_sequence_free_slot(res);
Trond Myklebusta13ce7c2014-01-29 12:24:03 -0500678out_noaction:
Trond Myklebust85563072012-12-11 10:31:12 -0500679 return ret;
Trond Myklebuste8794442012-12-15 13:56:18 -0500680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
Trond Myklebust14516c32010-07-31 14:29:06 -0400686out_retry:
Trond Myklebustd05dd4e2010-07-31 14:29:07 -0400687 if (!rpc_restart_call(task))
Trond Myklebust14516c32010-07-31 14:29:06 -0400688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
Andy Adamsonb0df8062009-04-01 09:22:18 -0400691}
Andy Adamsonf9c96fc2014-01-29 11:34:38 -0500692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
Andy Adamsonb0df8062009-04-01 09:22:18 -0400693
Trond Myklebust14516c32010-07-31 14:29:06 -0400694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400696{
Trond Myklebuste3725ec2012-11-16 12:25:01 -0500697 if (res->sr_slot == NULL)
Trond Myklebust14516c32010-07-31 14:29:06 -0400698 return 1;
Chuck Lever3bd23842013-08-09 12:49:19 -0400699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
Trond Myklebust14516c32010-07-31 14:29:06 -0400701 return nfs41_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400702}
703
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000704int nfs41_setup_sequence(struct nfs4_session *session,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400707 struct rpc_task *task)
708{
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400711
712 dprintk("--> %s\n", __func__);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400713 /* slot already allocated? */
Benny Halevydfb4f3092010-09-24 09:17:01 -0400714 if (res->sr_slot != NULL)
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400715 goto out_success;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400716
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400717 tbl = &session->fc_slot_table;
718
Trond Myklebust69d206b2012-11-22 13:21:02 -0500719 task->tk_timeout = 0;
720
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400721 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson774d5f12013-05-20 14:13:50 -0400722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400723 !args->sa_privileged) {
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500724 /* The state manager will wait until the slot table is empty */
Andy Adamson0b1c8fc2011-11-09 13:58:26 -0500725 dprintk("%s session is draining\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400726 goto out_sleep;
Andy Adamsonb069d942009-04-01 09:22:43 -0400727 }
728
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500729 slot = nfs4_alloc_slot(tbl);
Trond Myklebust69d206b2012-11-22 13:21:02 -0500730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400734 dprintk("<-- %s: no free slots\n", __func__);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400735 goto out_sleep;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
Trond Myklebust2b2fa712012-11-16 12:58:36 -0500739 args->sa_slot = slot;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400740
Chuck Levere8d92382013-08-09 12:47:51 -0400741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
Trond Myklebust2dc03b72012-11-16 16:10:11 -0500742 slot->slot_nr, slot->seq_nr);
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400743
Benny Halevydfb4f3092010-09-24 09:17:01 -0400744 res->sr_slot = slot;
Trond Myklebust8e63b6a2012-12-15 15:21:52 -0500745 res->sr_timestamp = jiffies;
Trond Myklebust2a6e26c2010-06-16 09:52:25 -0400746 res->sr_status_flags = 0;
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400752 trace_nfs4_setup_sequence(session, args);
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400753out_success:
754 rpc_call_start(task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400755 return 0;
Trond Myklebust7b939a32012-11-01 15:19:46 -0400756out_sleep:
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
Trond Myklebust1e1093c2012-11-01 16:44:05 -0400759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
Trond Myklebust7b939a32012-11-01 15:19:46 -0400763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
Andy Adamsonce5039c2009-04-01 09:22:13 -0400765}
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400767
Chuck Lever5a580e02013-08-09 12:48:09 -0400768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
Andy Adamsonce5039c2009-04-01 09:22:13 -0400772{
Trond Myklebust035168a2010-06-16 09:52:26 -0400773 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400774 int ret = 0;
775
Chuck Lever3bd23842013-08-09 12:49:19 -0400776 if (!session)
777 return nfs40_setup_sequence(server, args, res, task);
Trond Myklebust035168a2010-06-16 09:52:26 -0400778
Chuck Levere8d92382013-08-09 12:47:51 -0400779 dprintk("--> %s clp %p session %p sr_slot %u\n",
Benny Halevydfb4f3092010-09-24 09:17:01 -0400780 __func__, session->clp, session, res->sr_slot ?
Chuck Levere8d92382013-08-09 12:47:51 -0400781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
Trond Myklebust035168a2010-06-16 09:52:26 -0400782
Trond Myklebust9d12b212012-01-17 22:04:25 -0500783 ret = nfs41_setup_sequence(session, args, res, task);
Chuck Lever3bd23842013-08-09 12:49:19 -0400784
Andy Adamsonce5039c2009-04-01 09:22:13 -0400785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
Andy Adamsonce5039c2009-04-01 09:22:13 -0400789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400791 struct nfs4_call_sync_data *data = calldata;
Trond Myklebust6ba7db32012-10-22 20:07:20 -0400792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400793
Trond Myklebust035168a2010-06-16 09:52:26 -0400794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
Trond Myklebustd9afbd12012-10-22 20:28:44 -0400796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
Andy Adamsonce5039c2009-04-01 09:22:13 -0400797}
798
Andy Adamson69ab40c2009-04-01 09:22:19 -0400799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
Chuck Lever2a3eb2b2013-08-09 12:48:00 -0400801 struct nfs4_call_sync_data *data = calldata;
Andy Adamson69ab40c2009-04-01 09:22:19 -0400802
Trond Myklebust14516c32010-07-31 14:29:06 -0400803 nfs41_sequence_done(task, data->seq_res);
Andy Adamson69ab40c2009-04-01 09:22:19 -0400804}
805
Trond Myklebust17280172012-03-11 13:11:00 -0400806static const struct rpc_call_ops nfs41_call_sync_ops = {
Andy Adamsonce5039c2009-04-01 09:22:13 -0400807 .rpc_call_prepare = nfs41_call_sync_prepare,
Andy Adamson69ab40c2009-04-01 09:22:19 -0400808 .rpc_call_done = nfs41_call_sync_done,
Andy Adamsonce5039c2009-04-01 09:22:13 -0400809};
810
Chuck Lever3bd23842013-08-09 12:49:19 -0400811#else /* !CONFIG_NFS_V4_1 */
812
Chuck Lever5a580e02013-08-09 12:48:09 -0400813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
Chuck Lever3bd23842013-08-09 12:49:19 -0400818 return nfs40_setup_sequence(server, args, res, task);
Chuck Lever5a580e02013-08-09 12:48:09 -0400819}
Trond Myklebust8fe72ba2012-10-29 19:02:20 -0400820
Trond Myklebust14516c32010-07-31 14:29:06 -0400821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
Trond Myklebustdf896452010-06-16 09:52:26 -0400823{
Chuck Lever3bd23842013-08-09 12:49:19 -0400824 return nfs40_sequence_done(task, res);
Trond Myklebustdf896452010-06-16 09:52:26 -0400825}
Chuck Lever3bd23842013-08-09 12:49:19 -0400826
827#endif /* !CONFIG_NFS_V4_1 */
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400828
Chuck Lever9915ea72013-08-09 12:48:27 -0400829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
Trond Myklebust2ced46c2007-07-03 23:48:13 -0400847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
Trond Myklebustad389da2007-06-05 12:30:00 -0400848 struct nfs_server *server,
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500849 struct rpc_message *msg,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100850 struct nfs4_sequence_args *args,
851 struct nfs4_sequence_res *res)
Trond Myklebustad389da2007-06-05 12:30:00 -0400852{
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100853 int ret;
854 struct rpc_task *task;
Chuck Lever9915ea72013-08-09 12:48:27 -0400855 struct nfs_client *clp = server->nfs_client;
856 struct nfs4_call_sync_data data = {
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100857 .seq_server = server,
858 .seq_args = args,
859 .seq_res = res,
860 };
861 struct rpc_task_setup task_setup = {
862 .rpc_client = clnt,
863 .rpc_message = msg,
Chuck Lever9915ea72013-08-09 12:48:27 -0400864 .callback_ops = clp->cl_mvops->call_sync_ops,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100865 .callback_data = &data
866 };
867
868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
Trond Myklebustad389da2007-06-05 12:30:00 -0400873 rpc_put_task(task);
874 }
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100875 return ret;
876}
877
Trond Myklebustfd0c0952012-11-01 14:43:38 -0400878static
Bryan Schumaker7c513052011-03-24 17:12:24 +0000879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
Chuck Levera9c92d62013-08-09 12:48:18 -0400886 nfs4_init_sequence(args, res, cache_reply);
Chuck Lever9915ea72013-08-09 12:48:27 -0400887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
Bryan Schumakere73b83f2011-03-24 17:12:23 +0000888}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
891{
892 struct nfs_inode *nfsi = NFS_I(dir);
893
894 spin_lock(&dir->i_lock);
Trond Myklebust359d7d12012-05-28 10:01:34 -0400895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700896 if (!cinfo->atomic || cinfo->before != dir->i_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 nfs_force_lookup_revalidate(dir);
Trond Myklebusta9a4a872011-10-17 16:08:46 -0700898 dir->i_version = cinfo->after;
David Howellsde242c02012-12-20 21:52:38 +0000899 nfs_fscache_invalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 spin_unlock(&dir->i_lock);
901}
902
903struct nfs4_opendata {
904 struct kref kref;
905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
Trond Myklebust6926afd2012-01-07 13:22:46 -0500909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 struct nfs_fattr f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400912 struct nfs4_label *f_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 struct dentry *dir;
Al Viro82a2c1b2011-06-22 18:30:55 -0400914 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 struct nfs4_state_owner *owner;
916 struct nfs4_state *state;
917 struct iattr attrs;
918 unsigned long timestamp;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400919 unsigned int rpc_done : 1;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -0400920 unsigned int file_created : 1;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -0400921 unsigned int is_recover : 1;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400922 int rpc_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 int cancelled;
924};
Trond Myklebustdecf4912005-10-27 22:12:39 -0400925
Trond Myklebust49f9a0f2013-03-15 16:44:28 -0400926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100957{
958 p->o_res.f_attr = &p->f_attr;
David Quigley1775fd32013-05-22 12:50:42 -0400959 p->o_res.f_label = p->f_label;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
962 p->o_res.server = p->o_arg.server;
Andy Adamson5f657532012-10-03 02:39:34 -0400963 p->o_res.access_request = p->o_arg.access;
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100964 nfs_fattr_init(&p->f_attr);
Trond Myklebust6926afd2012-01-07 13:22:46 -0500965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100966}
967
Al Viro82a2c1b2011-06-22 18:30:55 -0400968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400970 const struct iattr *attrs,
David Quigley1775fd32013-05-22 12:50:42 -0400971 struct nfs4_label *label,
Trond Myklebust4a1c0892013-03-15 14:57:33 -0400972 enum open_claim_type4 claim,
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400973 gfp_t gfp_mask)
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100974{
Al Viro82a2c1b2011-06-22 18:30:55 -0400975 struct dentry *parent = dget_parent(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400980 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100981 if (p == NULL)
982 goto err;
David Quigley14c43f72013-05-22 12:50:43 -0400983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100989 if (p->o_arg.seqid == NULL)
David Quigley14c43f72013-05-22 12:50:43 -0400990 goto err_free_label;
Al Viro82a2c1b2011-06-22 18:30:55 -0400991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
Trond Myklebuste56e0b782006-01-03 09:55:08 +0100993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -0700998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
Weston Andros Adamsonae2bb032012-10-02 14:49:52 -07001005 }
David Howells7539bba2006-08-22 20:06:09 -04001006 p->o_arg.clientid = server->nfs_client->cl_clientid;
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
Al Viro82a2c1b2011-06-22 18:30:55 -04001009 p->o_arg.name = &dentry->d_name;
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001010 p->o_arg.server = server;
David Quigleyaa9c2662013-05-22 12:50:44 -04001011 p->o_arg.bitmask = nfs4_bitmask(server, label);
Trond Myklebust1549210f2012-06-05 09:16:47 -04001012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
David Quigley1775fd32013-05-22 12:50:42 -04001013 p->o_arg.label = label;
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
Trond Myklebust536e43d2012-01-17 22:04:26 -05001027 if (attrs != NULL && attrs->ia_valid != 0) {
Trond Myklebustc281fa9c2013-08-20 21:06:49 -04001028 __u32 verf[2];
Trond Myklebustd77d76f2010-06-16 09:52:27 -04001029
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
Chuck Levercd937102012-03-02 17:14:31 -05001032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001037 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001041 nfs4_init_opendata_res(p);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001042 kref_init(&p->kref);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001043 return p;
David Quigley14c43f72013-05-22 12:50:43 -04001044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001054static void nfs4_opendata_free(struct kref *kref)
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001055{
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
Al Viro82a2c1b2011-06-22 18:30:55 -04001058 struct super_block *sb = p->dentry->d_sb;
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001059
1060 nfs_free_seqid(p->o_arg.seqid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001063 nfs4_put_state_owner(p->owner);
David Quigley14c43f72013-05-22 12:50:43 -04001064
1065 nfs4_label_free(p->f_label);
1066
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001067 dput(p->dir);
Al Viro82a2c1b2011-06-22 18:30:55 -04001068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
Trond Myklebust6926afd2012-01-07 13:22:46 -05001070 nfs_fattr_free_names(&p->f_attr);
Trond Myklebuste911b812014-03-26 13:24:37 -07001071 kfree(p->f_attr.mdsthreshold);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001072 kfree(p);
1073}
1074
1075static void nfs4_opendata_put(struct nfs4_opendata *p)
1076{
1077 if (p != NULL)
1078 kref_put(&p->kref, nfs4_opendata_free);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01001079}
1080
Trond Myklebust06f814a2006-01-03 09:55:07 +01001081static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1082{
Trond Myklebust06f814a2006-01-03 09:55:07 +01001083 int ret;
1084
Trond Myklebust06f814a2006-01-03 09:55:07 +01001085 ret = rpc_wait_for_completion_task(task);
Trond Myklebust06f814a2006-01-03 09:55:07 +01001086 return ret;
1087}
1088
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001089static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
Trond Myklebust6ee41262007-07-08 14:11:36 -04001090{
1091 int ret = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001092
Trond Myklebust536e43d2012-01-17 22:04:26 -05001093 if (open_mode & (O_EXCL|O_TRUNC))
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001094 goto out;
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001096 case FMODE_READ:
Trond Myklebust88069f72009-12-08 08:33:16 -05001097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001099 break;
1100 case FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001103 break;
1104 case FMODE_READ|FMODE_WRITE:
Trond Myklebust88069f72009-12-08 08:33:16 -05001105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
Trond Myklebust6ee41262007-07-08 14:11:36 -04001107 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001108out:
Trond Myklebust6ee41262007-07-08 14:11:36 -04001109 return ret;
1110}
1111
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001112static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001113{
Trond Myklebust652f89f2011-12-09 19:05:58 -05001114 if (delegation == NULL)
1115 return 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001116 if ((delegation->type & fmode) != fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001117 return 0;
Trond Myklebust15c831b2008-12-23 15:21:39 -05001118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
Trond Myklebustaac00a82007-07-05 19:02:21 -04001119 return 0;
Trond Myklebustd25be542013-02-05 11:43:28 -05001120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
Trond Myklebustb7391f42008-12-23 15:21:52 -05001122 nfs_mark_delegation_referenced(delegation);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001123 return 1;
1124}
1125
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
Trond Myklebuste7616922006-01-03 09:55:13 +01001127{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001128 switch (fmode) {
Trond Myklebuste7616922006-01-03 09:55:13 +01001129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001138 nfs4_state_set_mode_locked(state, state->state | fmode);
Trond Myklebuste7616922006-01-03 09:55:13 +01001139}
1140
Trond Myklebust4f14c192014-02-12 19:15:06 -05001141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
Trond Myklebust003707c2007-07-05 18:07:55 -04001142{
Trond Myklebust4f14c192014-02-12 19:15:06 -05001143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
Trond Myklebuste999e802014-02-10 18:20:47 -05001156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
Trond Myklebuste999e802014-02-10 18:20:47 -05001163 return true;
Trond Myklebust4f14c192014-02-12 19:15:06 -05001164 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
Trond Myklebust226056c2014-02-11 10:41:07 -05001170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
1172{
1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
Trond Myklebust003707c2007-07-05 18:07:55 -04001190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust226056c2014-02-11 10:41:07 -05001193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
Trond Myklebust4f14c192014-02-12 19:15:06 -05001200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust226056c2014-02-11 10:41:07 -05001202}
1203
Trond Myklebust003707c2007-07-05 18:07:55 -04001204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1205{
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001206 switch (fmode) {
Trond Myklebust003707c2007-07-05 18:07:55 -04001207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
Trond Myklebuste999e802014-02-10 18:20:47 -05001216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001221}
1222
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001223static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224{
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
Trond Myklebust003707c2007-07-05 18:07:55 -04001230 if (deleg_stateid != NULL) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
Trond Myklebust003707c2007-07-05 18:07:55 -04001232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001238 update_open_stateflags(state, fmode);
Trond Myklebustec073422005-10-20 14:22:47 -07001239 spin_unlock(&state->owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240}
1241
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001242static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001248 fmode &= (FMODE_READ|FMODE_WRITE);
Trond Myklebust34310432008-12-23 15:21:38 -05001249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
Trond Myklebust17f26b12013-08-21 15:48:42 -04001256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
Trond Myklebustd25be542013-02-05 11:43:28 -05001257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001258 (deleg_cur->type & fmode) != fmode)
Trond Myklebust34310432008-12-23 15:21:38 -05001259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
Trond Myklebustf597c532012-03-04 18:13:56 -05001263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
Trond Myklebust34310432008-12-23 15:21:38 -05001264 goto no_delegation_unlock;
1265
Trond Myklebustb7391f42008-12-23 15:21:52 -05001266 nfs_mark_delegation_referenced(deleg_cur);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001275 __update_open_stateid(state, open_stateid, NULL, fmode);
Trond Myklebust34310432008-12-23 15:21:38 -05001276 ret = 1;
1277 }
Trond Myklebust4f14c192014-02-12 19:15:06 -05001278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
Trond Myklebust34310432008-12-23 15:21:38 -05001280
1281 return ret;
1282}
1283
1284
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
Trond Myklebustaac00a82007-07-05 19:02:21 -04001292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04001296 nfs4_inode_return_delegation(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001297}
1298
Trond Myklebust6ee41262007-07-08 14:11:36 -04001299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
Trond Myklebustaac00a82007-07-05 19:02:21 -04001300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
Trond Myklebustf448bad2013-05-29 15:36:40 -04001304 int open_mode = opendata->o_arg.open_flags;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001305 fmode_t fmode = opendata->o_arg.fmode;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
Trond Myklebustaac00a82007-07-05 19:02:21 -04001309 for (;;) {
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001310 if (can_open_cached(state, fmode, open_mode)) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001311 spin_lock(&state->owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001314 spin_unlock(&state->owner->so_lock);
Trond Myklebust6ee41262007-07-08 14:11:36 -04001315 goto out_return_state;
1316 }
1317 spin_unlock(&state->owner->so_lock);
1318 }
Trond Myklebust34310432008-12-23 15:21:38 -05001319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
Trond Myklebust652f89f2011-12-09 19:05:58 -05001321 if (!can_open_delegated(delegation, fmode)) {
Trond Myklebust34310432008-12-23 15:21:38 -05001322 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001323 break;
Trond Myklebust34310432008-12-23 15:21:38 -05001324 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001325 /* Save the delegation */
Trond Myklebustf597c532012-03-04 18:13:56 -05001326 nfs4_stateid_copy(&stateid, &delegation->stateid);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001327 rcu_read_unlock();
Trond Myklebustfa332942013-04-09 12:56:52 -04001328 nfs_release_seqid(opendata->o_arg.seqid);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001334 ret = -EAGAIN;
Trond Myklebust34310432008-12-23 15:21:38 -05001335
1336 /* Try to update the stateid using the delegation */
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001337 if (update_open_stateid(state, NULL, &stateid, fmode))
Trond Myklebust34310432008-12-23 15:21:38 -05001338 goto out_return_state;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001339 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04001340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
Andy Adamsone23008e2012-10-02 21:07:32 -04001347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
Andy Adamsone23008e2012-10-02 21:07:32 -04001392 }
1393
Andy Adamsone23008e2012-10-02 21:07:32 -04001394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
Weston Andros Adamsond2bfda22013-10-21 13:10:13 -04001400update:
Andy Adamsone23008e2012-10-02 21:07:32 -04001401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
Trond Myklebustd49f0422013-10-28 14:57:12 -04001403 atomic_inc(&state->count);
Andy Adamsone23008e2012-10-02 21:07:32 -04001404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001416 int ret;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001417
Trond Myklebustaac00a82007-07-05 19:02:21 -04001418 if (!data->rpc_done) {
Trond Myklebust6ee41262007-07-08 14:11:36 -04001419 state = nfs4_try_open_cached(data);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001420 goto out;
1421 }
1422
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001423 ret = -EAGAIN;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001425 goto err;
David Quigley1775fd32013-05-22 12:50:42 -04001426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001427 ret = PTR_ERR(inode);
Trond Myklebust03f28e32006-03-20 13:44:48 -05001428 if (IS_ERR(inode))
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001429 goto err;
1430 ret = -ENOMEM;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001433 goto err_put_inode;
Andy Adamsone23008e2012-10-02 21:07:32 -04001434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
Trond Myklebust34310432008-12-23 15:21:38 -05001436 update_open_stateid(state, &data->o_res.stateid, NULL,
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001437 data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001438 iput(inode);
Trond Myklebustaac00a82007-07-05 19:02:21 -04001439out:
Trond Myklebust7aa262b52013-02-28 16:19:59 -08001440 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001441 return state;
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001446}
1447
Andy Adamsone23008e2012-10-02 21:07:32 -04001448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
Trond Myklebust864472e2006-01-03 09:55:15 +01001456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001475{
1476 struct nfs4_opendata *opendata;
1477
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
David Quigley1775fd32013-05-22 12:50:42 -04001479 NULL, NULL, claim, GFP_NOFS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
Trond Myklebust864472e2006-01-03 09:55:15 +01001488{
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001489 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001490 int ret;
1491
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001497 ret = _nfs4_recover_proc_open(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01001498 if (ret != 0)
1499 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001500 newstate = nfs4_opendata_to_nfs4_state(opendata);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
Al Viro643168c2011-06-22 18:20:23 -04001503 nfs4_close_state(newstate, fmode);
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001504 *res = newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
Trond Myklebust864472e2006-01-03 09:55:15 +01001510 struct nfs4_state *newstate;
Trond Myklebust864472e2006-01-03 09:55:15 +01001511 int ret;
1512
Trond Myklebust4f14c192014-02-12 19:15:06 -05001513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001517 /* memory barrier prior to reading state->n_* */
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04001519 clear_bit(NFS_OPEN_STATE, &state->flags);
Trond Myklebust864472e2006-01-03 09:55:15 +01001520 smp_rmb();
1521 if (state->n_rdwr != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001523 if (ret != 0)
1524 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001525 if (newstate != state)
1526 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001527 }
1528 if (state->n_wronly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001530 if (ret != 0)
1531 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001532 if (newstate != state)
1533 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001534 }
1535 if (state->n_rdonly != 0) {
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
Trond Myklebust864472e2006-01-03 09:55:15 +01001537 if (ret != 0)
1538 return ret;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001539 if (newstate != state)
1540 return -ESTALE;
Trond Myklebust864472e2006-01-03 09:55:15 +01001541 }
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
Trond Myklebustf597c532012-03-04 18:13:56 -05001547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001548 write_seqlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
Trond Myklebustf597c532012-03-04 18:13:56 -05001550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001551 write_sequnlock(&state->seqlock);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001552 }
Trond Myklebust864472e2006-01-03 09:55:15 +01001553 return 0;
1554}
1555
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 */
Trond Myklebust539cd032007-06-05 11:46:42 -04001560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561{
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001562 struct nfs_delegation *delegation;
Trond Myklebust864472e2006-01-03 09:55:15 +01001563 struct nfs4_opendata *opendata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001564 fmode_t delegation_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 int status;
1566
Trond Myklebust4a1c0892013-03-15 14:57:33 -04001567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
Trond Myklebust15c831b2008-12-23 15:21:39 -05001573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
Trond Myklebust65bbf6b2007-08-27 09:57:46 -04001574 delegation_type = delegation->type;
Trond Myklebust1ac7e2f2007-07-08 21:04:15 -04001575 rcu_read_unlock();
Trond Myklebust864472e2006-01-03 09:55:15 +01001576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001578 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 return status;
1580}
1581
Trond Myklebust539cd032007-06-05 11:46:42 -04001582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04001588 err = _nfs4_do_open_reclaim(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04001589 trace_nfs4_open_reclaim(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04001590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
Trond Myklebust168667c2010-10-19 19:47:49 -04001592 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00001593 break;
1594 nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 } while (exception.retry);
1596 return err;
1597}
1598
Trond Myklebust864472e2006-01-03 09:55:15 +01001599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04001606 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04001607 ret = nfs4_do_open_reclaim(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01001608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001612static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613{
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
Chuck Lever352297b2013-10-17 14:13:24 -04001637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04001640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001646 case -NFS4ERR_OPENMODE:
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001650 return 0;
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
Trond Myklebustbe76b5b2013-04-01 15:40:44 -04001660 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 return err;
1662}
1663
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04001664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
Chuck Leverbe05c862013-08-09 12:49:47 -04001680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
Chuck Leverbe05c862013-08-09 12:49:47 -04001686}
1687
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001692 nfs40_sequence_done(task, &data->c_res.seq_res);
Chuck Leverbe05c862013-08-09 12:49:47 -04001693
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001694 data->rpc_status = task->tk_status;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001695 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05001696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
Trond Myklebustbb226292008-01-02 15:19:18 -05001697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01001698 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust3e309912007-07-07 13:19:59 -04001699 data->rpc_done = 1;
Trond Myklebust26e976a2006-01-03 09:55:21 +01001700 }
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001712 if (!data->rpc_done)
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001713 goto out_free;
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001714 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001715 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001716 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001717out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001718 nfs4_opendata_put(data);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
Chuck Leverbe05c862013-08-09 12:49:47 -04001722 .rpc_call_prepare = nfs4_open_confirm_prepare,
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001742 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001745 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001746 .flags = RPC_TASK_ASYNC,
1747 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 int status;
1749
Trond Myklebust17ead6c2014-02-01 14:53:23 -05001750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001751 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001752 data->rpc_done = 0;
1753 data->rpc_status = 0;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001754 data->timestamp = jiffies;
Trond Myklebustc970aa82007-07-14 15:39:59 -04001755 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05001756 if (IS_ERR(task))
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001757 return PTR_ERR(task);
Trond Myklebustcdd4e682006-01-03 09:55:12 +01001758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05001764 rpc_put_task(task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 return status;
1766}
1767
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769{
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
Trond Myklebust549b19c2013-04-16 18:42:34 -04001772 struct nfs_client *clp = sp->so_server->nfs_client;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001773
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001775 goto out_wait;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
Trond Myklebustdc0b0272008-12-23 15:21:56 -05001783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
Trond Myklebust6ee41262007-07-08 14:11:36 -04001784 goto out_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
Trond Myklebust652f89f2011-12-09 19:05:58 -05001787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
Trond Myklebustcd4c9be2013-04-23 14:46:25 -04001788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
Trond Myklebust652f89f2011-12-09 19:05:58 -05001789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
Trond Myklebustaac00a82007-07-05 19:02:21 -04001791 rcu_read_unlock();
1792 }
Trond Myklebust95b72eb2012-04-20 19:24:51 -04001793 /* Update client id. */
Trond Myklebust549b19c2013-04-16 18:42:34 -04001794 data->o_arg.clientid = clp->cl_clientid;
Trond Myklebust8188df12013-04-23 14:31:19 -04001795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
Andy Adamsone23008e2012-10-02 21:07:32 -04001799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
Trond Myklebust8188df12013-04-23 14:31:19 -04001800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
Trond Myklebust6f220ed2007-07-17 21:50:45 -04001802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001804 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04001805 if (nfs4_setup_sequence(data->o_arg.server,
Andy Adamsond8985282009-04-01 09:22:21 -04001806 &data->o_arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04001807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
Trond Myklebust549b19c2013-04-16 18:42:34 -04001810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
Trond Myklebust6ee41262007-07-08 14:11:36 -04001820 return;
Trond Myklebust652f89f2011-12-09 19:05:58 -05001821unlock_no_action:
1822 rcu_read_unlock();
Trond Myklebust6ee41262007-07-08 14:11:36 -04001823out_no_action:
1824 task->tk_action = NULL;
Trond Myklebustc8da19b2013-02-11 19:01:21 -05001825out_wait:
Trond Myklebustb75ad4c2012-11-29 17:27:47 -05001826 nfs4_sequence_done(task, &data->o_res.seq_res);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001827}
1828
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001833 data->rpc_status = task->tk_status;
Andy Adamsond8985282009-04-01 09:22:21 -04001834
Trond Myklebust14516c32010-07-31 14:29:06 -04001835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
Andy Adamsond8985282009-04-01 09:22:21 -04001837
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001838 if (task->tk_status == 0) {
Trond Myklebust807d66d82012-10-02 17:09:00 -07001839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
Trond Myklebust6f926b52005-10-18 14:20:18 -07001841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001844 data->rpc_status = -ELOOP;
Trond Myklebust6f926b52005-10-18 14:20:18 -07001845 break;
1846 case S_IFDIR:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001847 data->rpc_status = -EISDIR;
Trond Myklebust6f926b52005-10-18 14:20:18 -07001848 break;
1849 default:
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001850 data->rpc_status = -ENOTDIR;
Trond Myklebust807d66d82012-10-02 17:09:00 -07001851 }
Trond Myklebust6f926b52005-10-18 14:20:18 -07001852 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01001853 renew_lease(data->o_res.server, data->timestamp);
Trond Myklebust0f9f95e2007-07-08 16:19:56 -04001854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
Trond Myklebust6f926b52005-10-18 14:20:18 -07001856 }
Trond Myklebust3e309912007-07-07 13:19:59 -04001857 data->rpc_done = 1;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001858}
Trond Myklebust6f926b52005-10-18 14:20:18 -07001859
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
Trond Myklebust3e309912007-07-07 13:19:59 -04001869 if (data->rpc_status != 0 || !data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001874 state = nfs4_opendata_to_nfs4_state(data);
Trond Myklebust1b370bc2007-07-07 08:04:47 -04001875 if (!IS_ERR(state))
Al Viro643168c2011-06-22 18:20:23 -04001876 nfs4_close_state(state, data->o_arg.fmode);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001877out_free:
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001878 nfs4_opendata_put(data);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04001894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04001900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04001902 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
Trond Myklebust101070c2008-02-19 20:04:23 -05001905 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04001906 .flags = RPC_TASK_ASYNC,
1907 };
Trond Myklebust24ac23a2006-01-03 09:55:11 +01001908 int status;
1909
Chuck Levera9c92d62013-08-09 12:48:18 -04001910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04001911 kref_get(&data->kref);
Trond Myklebust3e309912007-07-07 13:19:59 -04001912 data->rpc_done = 0;
1913 data->rpc_status = 0;
Trond Myklebust2ced46c2007-07-03 23:48:13 -04001914 data->cancelled = 0;
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001915 data->is_recover = 0;
1916 if (isrecover) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04001917 nfs4_set_sequence_privileged(&o_arg->seq_args);
Trond Myklebustbdeca1b2013-04-23 14:52:44 -04001918 data->is_recover = 1;
1919 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04001920 task = rpc_run_task(&task_setup_data);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
Trond Myklebust6926afd2012-01-07 13:22:46 -05001944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001955static int nfs4_opendata_access(struct rpc_cred *cred,
1956 struct nfs4_opendata *opendata,
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05001957 struct nfs4_state *state, fmode_t fmode,
1958 int openflags)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001959{
1960 struct nfs_access_entry cache;
1961 u32 mask;
1962
1963 /* access call failed or for some reason the server doesn't
1964 * support any access modes -- defer access call until later */
1965 if (opendata->o_res.access_supported == 0)
1966 return 0;
1967
1968 mask = 0;
Weston Andros Adamsonbbd3a8e2012-10-02 14:49:51 -07001969 /* don't check MAY_WRITE - a newly created file may not have
Weston Andros Adamsonf8d9a892013-01-03 16:42:29 -05001970 * write mode bits, but POSIX allows the creating process to write.
1971 * use openflags to check for exec, because fmode won't
1972 * always have FMODE_EXEC set when file open for exec. */
1973 if (openflags & __FMODE_EXEC) {
1974 /* ONLY check for exec rights */
1975 mask = MAY_EXEC;
1976 } else if (fmode & FMODE_READ)
1977 mask = MAY_READ;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001978
1979 cache.cred = cred;
1980 cache.jiffies = jiffies;
1981 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1982 nfs_access_add_cache(state->inode, &cache);
1983
Weston Andros Adamsonbbd3a8e2012-10-02 14:49:51 -07001984 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001985 return 0;
1986
1987 /* even though OPEN succeeded, access is denied. Close the file */
1988 nfs4_close_state(state, fmode);
Weston Andros Adamson998f40b2012-11-02 18:00:56 -04001989 return -EACCES;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04001990}
1991
Alexandros Batsakisb2579572009-12-14 21:27:57 -08001992/*
1993 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1994 */
1995static int _nfs4_proc_open(struct nfs4_opendata *data)
1996{
1997 struct inode *dir = data->dir->d_inode;
1998 struct nfs_server *server = NFS_SERVER(dir);
1999 struct nfs_openargs *o_arg = &data->o_arg;
2000 struct nfs_openres *o_res = &data->o_res;
2001 int status;
2002
2003 status = nfs4_run_open_task(data, 0);
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002004 if (!data->rpc_done)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002005 return status;
Trond Myklebust08ef7bd2011-10-18 16:11:49 -07002006 if (status != 0) {
2007 if (status == -NFS4ERR_BADNAME &&
2008 !(o_arg->open_flags & O_CREAT))
2009 return -ENOENT;
2010 return status;
2011 }
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002012
Trond Myklebust6926afd2012-01-07 13:22:46 -05002013 nfs_fattr_map_and_free_names(server, &data->f_attr);
2014
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002015 if (o_arg->open_flags & O_CREAT) {
Trond Myklebust56ae19f2005-10-27 22:12:40 -04002016 update_changeattr(dir, &o_res->cinfo);
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002017 if (o_arg->open_flags & O_EXCL)
2018 data->file_created = 1;
2019 else if (o_res->cinfo.before != o_res->cinfo.after)
2020 data->file_created = 1;
2021 }
Trond Myklebust0df5dd42010-04-11 16:48:44 -04002022 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2023 server->caps &= ~NFS_CAP_POSIX_LOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
Trond Myklebustcdd4e682006-01-03 09:55:12 +01002025 status = _nfs4_proc_open_confirm(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 if (status != 0)
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002027 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 }
2029 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
Andy Adamson8935ef62014-05-23 06:22:59 -07002030 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002031 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032}
2033
Andy Adamsond83217c2011-03-01 01:34:17 +00002034static int nfs4_recover_expired_lease(struct nfs_server *server)
2035{
2036 return nfs4_client_recover_expired_lease(server->nfs_client);
2037}
2038
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039/*
2040 * OPEN_EXPIRED:
2041 * reclaim state on the server after a network partition.
2042 * Assumes caller holds the appropriate lock
2043 */
Trond Myklebust539cd032007-06-05 11:46:42 -04002044static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045{
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002046 struct nfs4_opendata *opendata;
Trond Myklebust864472e2006-01-03 09:55:15 +01002047 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002049 opendata = nfs4_open_recoverdata_alloc(ctx, state,
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002050 NFS4_OPEN_CLAIM_FH);
Trond Myklebust6f220ed2007-07-17 21:50:45 -04002051 if (IS_ERR(opendata))
2052 return PTR_ERR(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002053 ret = nfs4_open_recover(opendata, state);
Trond Myklebust35d05772008-04-05 15:54:17 -04002054 if (ret == -ESTALE)
Al Viro3d4ff432011-06-22 18:40:12 -04002055 d_drop(ctx->dentry);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002056 nfs4_opendata_put(opendata);
Trond Myklebust864472e2006-01-03 09:55:15 +01002057 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058}
2059
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002060static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
Trond Myklebust202b50d2005-06-22 17:16:29 +00002061{
Trond Myklebust539cd032007-06-05 11:46:42 -04002062 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust202b50d2005-06-22 17:16:29 +00002063 struct nfs4_exception exception = { };
2064 int err;
2065
2066 do {
Trond Myklebust539cd032007-06-05 11:46:42 -04002067 err = _nfs4_open_expired(ctx, state);
Trond Myklebust42113a72013-08-12 16:19:27 -04002068 trace_nfs4_open_expired(ctx, 0, err);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002069 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2070 continue;
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002071 switch (err) {
2072 default:
2073 goto out;
2074 case -NFS4ERR_GRACE:
2075 case -NFS4ERR_DELAY:
2076 nfs4_handle_exception(server, err, &exception);
2077 err = 0;
2078 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00002079 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05002080out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00002081 return err;
2082}
2083
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2085{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 struct nfs_open_context *ctx;
Trond Myklebust864472e2006-01-03 09:55:15 +01002087 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088
Trond Myklebust864472e2006-01-03 09:55:15 +01002089 ctx = nfs4_state_find_open_context(state);
2090 if (IS_ERR(ctx))
Trond Myklebust91876b12013-03-28 14:01:33 -04002091 return -EAGAIN;
Trond Myklebust539cd032007-06-05 11:46:42 -04002092 ret = nfs4_do_open_expired(ctx, state);
Trond Myklebust864472e2006-01-03 09:55:15 +01002093 put_nfs_open_context(ctx);
2094 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095}
2096
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002097#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002098static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002099{
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002100 struct nfs_server *server = NFS_SERVER(state->inode);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002101 nfs4_stateid *stateid = &state->stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002102 struct nfs_delegation *delegation;
2103 struct rpc_cred *cred = NULL;
2104 int status = -NFS4ERR_BAD_STATEID;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002105
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002106 /* If a state reset has been done, test_stateid is unneeded */
2107 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2108 return;
2109
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002110 /* Get the delegation credential for use by test/free_stateid */
2111 rcu_read_lock();
2112 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2113 if (delegation != NULL &&
2114 nfs4_stateid_match(&delegation->stateid, stateid)) {
2115 cred = get_rpccred(delegation->cred);
2116 rcu_read_unlock();
2117 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002118 trace_nfs4_test_delegation_stateid(state, NULL, status);
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002119 } else
2120 rcu_read_unlock();
2121
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002122 if (status != NFS_OK) {
2123 /* Free the stateid unless the server explicitly
2124 * informs us the stateid is unrecognized. */
2125 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002126 nfs41_free_stateid(server, stateid, cred);
Bryan Schumaker69388672012-09-26 15:25:52 -04002127 nfs_remove_bad_delegation(state->inode);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002128
Bryan Schumaker69388672012-09-26 15:25:52 -04002129 write_seqlock(&state->seqlock);
2130 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2131 write_sequnlock(&state->seqlock);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2133 }
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002134
2135 if (cred != NULL)
2136 put_rpccred(cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002137}
2138
2139/**
2140 * nfs41_check_open_stateid - possibly free an open stateid
2141 *
2142 * @state: NFSv4 state for an inode
2143 *
2144 * Returns NFS_OK if recovery for this stateid is now finished.
2145 * Otherwise a negative NFS4ERR value is returned.
2146 */
2147static int nfs41_check_open_stateid(struct nfs4_state *state)
2148{
2149 struct nfs_server *server = NFS_SERVER(state->inode);
Bryan Schumakerfcb6d9c2012-09-26 15:25:53 -04002150 nfs4_stateid *stateid = &state->open_stateid;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002151 struct rpc_cred *cred = state->owner->so_cred;
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002152 int status;
2153
2154 /* If a state reset has been done, test_stateid is unneeded */
2155 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2156 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2157 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2158 return -NFS4ERR_BAD_STATEID;
2159
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002160 status = nfs41_test_stateid(server, stateid, cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04002161 trace_nfs4_test_open_stateid(state, NULL, status);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002162 if (status != NFS_OK) {
2163 /* Free the stateid unless the server explicitly
2164 * informs us the stateid is unrecognized. */
2165 if (status != -NFS4ERR_BAD_STATEID)
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04002166 nfs41_free_stateid(server, stateid, cred);
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002167
2168 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2169 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2170 clear_bit(NFS_O_RDWR_STATE, &state->flags);
Trond Myklebustfd068b22013-04-22 11:29:51 -04002171 clear_bit(NFS_OPEN_STATE, &state->flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002172 }
2173 return status;
2174}
2175
2176static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2177{
Chuck Levereb64cf92012-07-11 16:30:05 -04002178 int status;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05002179
Chuck Lever3e60ffd2012-07-11 16:30:14 -04002180 nfs41_clear_delegation_stateid(state);
2181 status = nfs41_check_open_stateid(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04002182 if (status != NFS_OK)
2183 status = nfs4_open_expired(sp, state);
2184 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04002185}
2186#endif
2187
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188/*
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002189 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2190 * fields corresponding to attributes that were used to store the verifier.
2191 * Make sure we clobber those fields in the later setattr call
2192 */
2193static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2194{
2195 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2196 !(sattr->ia_valid & ATTR_ATIME_SET))
2197 sattr->ia_valid |= ATTR_ATIME;
2198
2199 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2200 !(sattr->ia_valid & ATTR_MTIME_SET))
2201 sattr->ia_valid |= ATTR_MTIME;
2202}
2203
Trond Myklebustc21443c2013-02-07 14:26:21 -05002204static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2205 fmode_t fmode,
2206 int flags,
Trond Myklebust3efb9722013-05-29 13:17:04 -04002207 struct nfs_open_context *ctx)
Trond Myklebustc21443c2013-02-07 14:26:21 -05002208{
2209 struct nfs4_state_owner *sp = opendata->owner;
2210 struct nfs_server *server = sp->so_server;
Trond Myklebust275bb302013-05-29 13:11:28 -04002211 struct dentry *dentry;
Trond Myklebustc21443c2013-02-07 14:26:21 -05002212 struct nfs4_state *state;
2213 unsigned int seq;
2214 int ret;
2215
2216 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2217
2218 ret = _nfs4_proc_open(opendata);
2219 if (ret != 0)
2220 goto out;
2221
2222 state = nfs4_opendata_to_nfs4_state(opendata);
2223 ret = PTR_ERR(state);
2224 if (IS_ERR(state))
2225 goto out;
2226 if (server->caps & NFS_CAP_POSIX_LOCK)
2227 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2228
Trond Myklebust275bb302013-05-29 13:11:28 -04002229 dentry = opendata->dentry;
2230 if (dentry->d_inode == NULL) {
2231 /* FIXME: Is this d_drop() ever needed? */
2232 d_drop(dentry);
2233 dentry = d_add_unique(dentry, igrab(state->inode));
2234 if (dentry == NULL) {
2235 dentry = opendata->dentry;
2236 } else if (dentry != ctx->dentry) {
2237 dput(ctx->dentry);
2238 ctx->dentry = dget(dentry);
2239 }
2240 nfs_set_verifier(dentry,
2241 nfs_save_change_attribute(opendata->dir->d_inode));
2242 }
2243
Trond Myklebustc21443c2013-02-07 14:26:21 -05002244 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2245 if (ret != 0)
2246 goto out;
2247
Trond Myklebust3efb9722013-05-29 13:17:04 -04002248 ctx->state = state;
Trond Myklebustc45ffdd2013-05-29 13:34:46 -04002249 if (dentry->d_inode == state->inode) {
2250 nfs_inode_attach_open_context(ctx);
2251 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2252 nfs4_schedule_stateid_recovery(server, state);
2253 }
Trond Myklebustc21443c2013-02-07 14:26:21 -05002254out:
2255 return ret;
2256}
2257
Jeff Laytonaa53ed52007-06-05 14:49:03 -04002258/*
Trond Myklebust24ac23a2006-01-03 09:55:11 +01002259 * Returns a referenced nfs4_state
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 */
Andy Adamson82be4172012-05-23 05:02:35 -04002261static int _nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002262 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002263 int flags,
2264 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002265 struct nfs4_label *label,
2266 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267{
2268 struct nfs4_state_owner *sp;
2269 struct nfs4_state *state = NULL;
2270 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002271 struct nfs4_opendata *opendata;
Trond Myklebust4197a052013-05-29 12:37:49 -04002272 struct dentry *dentry = ctx->dentry;
2273 struct rpc_cred *cred = ctx->cred;
2274 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2275 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002276 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
David Quigley1775fd32013-05-22 12:50:42 -04002277 struct nfs4_label *olabel = NULL;
Trond Myklebustaac00a82007-07-05 19:02:21 -04002278 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279
2280 /* Protect against reboot recovery conflicts */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 status = -ENOMEM;
Trond Myklebustd1e284d2012-01-17 22:04:24 -05002282 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2283 if (sp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2285 goto out_err;
2286 }
Trond Myklebust58d97142006-01-03 09:55:24 +01002287 status = nfs4_recover_expired_lease(server);
2288 if (status != 0)
Trond Myklebustb4454fe2006-01-03 09:55:25 +01002289 goto err_put_state_owner;
Al Viro82a2c1b2011-06-22 18:30:55 -04002290 if (dentry->d_inode != NULL)
2291 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
Trond Myklebust58d97142006-01-03 09:55:24 +01002292 status = -ENOMEM;
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002293 if (dentry->d_inode)
2294 claim = NFS4_OPEN_CLAIM_FH;
Trond Myklebust4a1c0892013-03-15 14:57:33 -04002295 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002296 label, claim, GFP_KERNEL);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002297 if (opendata == NULL)
Trond Myklebust95d35cb2008-12-23 15:21:45 -05002298 goto err_put_state_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299
David Quigley14c43f72013-05-22 12:50:43 -04002300 if (label) {
2301 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2302 if (IS_ERR(olabel)) {
2303 status = PTR_ERR(olabel);
2304 goto err_opendata_put;
2305 }
2306 }
2307
Trond Myklebuste911b812014-03-26 13:24:37 -07002308 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2309 if (!opendata->f_attr.mdsthreshold) {
2310 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2311 if (!opendata->f_attr.mdsthreshold)
2312 goto err_free_label;
2313 }
Trond Myklebust1549210f2012-06-05 09:16:47 -04002314 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
Andy Adamson82be4172012-05-23 05:02:35 -04002315 }
Al Viro82a2c1b2011-06-22 18:30:55 -04002316 if (dentry->d_inode != NULL)
2317 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
Trond Myklebustaac00a82007-07-05 19:02:21 -04002318
Trond Myklebust3efb9722013-05-29 13:17:04 -04002319 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002320 if (status != 0)
David Quigley14c43f72013-05-22 12:50:43 -04002321 goto err_free_label;
Trond Myklebust3efb9722013-05-29 13:17:04 -04002322 state = ctx->state;
Weston Andros Adamson6168f622012-09-10 14:00:46 -04002323
Trond Myklebust549b19c2013-04-16 18:42:34 -04002324 if ((opendata->o_arg.open_flags & O_EXCL) &&
2325 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002326 nfs4_exclusive_attrset(opendata, sattr);
2327
2328 nfs_fattr_init(opendata->o_res.f_attr);
2329 status = nfs4_do_setattr(state->inode, cred,
2330 opendata->o_res.f_attr, sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002331 state, label, olabel);
2332 if (status == 0) {
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002333 nfs_setattr_update_inode(state->inode, sattr);
David Quigley1775fd32013-05-22 12:50:42 -04002334 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
David Quigleyaa9c2662013-05-22 12:50:44 -04002335 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
David Quigley1775fd32013-05-22 12:50:42 -04002336 }
Trond Myklebust0ab64e02010-04-16 16:22:51 -04002337 }
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002338 if (opendata->file_created)
2339 *opened |= FILE_CREATED;
Andy Adamson82be4172012-05-23 05:02:35 -04002340
Trond Myklebuste911b812014-03-26 13:24:37 -07002341 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
Andy Adamson82be4172012-05-23 05:02:35 -04002342 *ctx_th = opendata->f_attr.mdsthreshold;
Trond Myklebuste911b812014-03-26 13:24:37 -07002343 opendata->f_attr.mdsthreshold = NULL;
2344 }
Andy Adamson82be4172012-05-23 05:02:35 -04002345
David Quigley14c43f72013-05-22 12:50:43 -04002346 nfs4_label_free(olabel);
2347
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002348 nfs4_opendata_put(opendata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 return 0;
David Quigley14c43f72013-05-22 12:50:43 -04002351err_free_label:
2352 nfs4_label_free(olabel);
Trond Myklebustc6d00e62007-06-17 16:02:44 -04002353err_opendata_put:
2354 nfs4_opendata_put(opendata);
Trond Myklebuste56e0b782006-01-03 09:55:08 +01002355err_put_state_owner:
2356 nfs4_put_state_owner(sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358 return status;
2359}
2360
2361
Andy Adamson82be4172012-05-23 05:02:35 -04002362static struct nfs4_state *nfs4_do_open(struct inode *dir,
Trond Myklebust4197a052013-05-29 12:37:49 -04002363 struct nfs_open_context *ctx,
Andy Adamson82be4172012-05-23 05:02:35 -04002364 int flags,
2365 struct iattr *sattr,
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002366 struct nfs4_label *label,
2367 int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368{
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002369 struct nfs_server *server = NFS_SERVER(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370 struct nfs4_exception exception = { };
2371 struct nfs4_state *res;
2372 int status;
2373
2374 do {
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002375 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
Trond Myklebust3efb9722013-05-29 13:17:04 -04002376 res = ctx->state;
Trond Myklebust42113a72013-08-12 16:19:27 -04002377 trace_nfs4_open_file(ctx, flags, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378 if (status == 0)
2379 break;
2380 /* NOTE: BAD_SEQID means the server and client disagree about the
2381 * book-keeping w.r.t. state-changing operations
2382 * (OPEN/CLOSE/LOCK/LOCKU...)
2383 * It is actually a sign of a bug on the client or on the server.
2384 *
2385 * If we receive a BAD_SEQID error in the particular case of
Trond Myklebustcee54fc2005-10-18 14:20:12 -07002386 * doing an OPEN, we assume that nfs_increment_open_seqid() will
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 * have unhashed the old state_owner for us, and that we can
2388 * therefore safely retry using a new one. We should still warn
2389 * the user though...
2390 */
2391 if (status == -NFS4ERR_BAD_SEQID) {
Trond Myklebust9a3ba432012-03-12 18:01:48 -04002392 pr_warn_ratelimited("NFS: v4 server %s "
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04002393 " returned a bad sequence-id error!\n",
2394 NFS_SERVER(dir)->nfs_client->cl_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 exception.retry = 1;
2396 continue;
2397 }
Trond Myklebust550f5742005-10-18 14:20:21 -07002398 /*
2399 * BAD_STATEID on OPEN means that the server cancelled our
2400 * state before it received the OPEN_CONFIRM.
2401 * Recover by retrying the request as per the discussion
2402 * on Page 181 of RFC3530.
2403 */
2404 if (status == -NFS4ERR_BAD_STATEID) {
2405 exception.retry = 1;
2406 continue;
2407 }
Trond Myklebustaac00a82007-07-05 19:02:21 -04002408 if (status == -EAGAIN) {
2409 /* We must have found a delegation */
2410 exception.retry = 1;
2411 continue;
2412 }
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04002413 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2414 continue;
2415 res = ERR_PTR(nfs4_handle_exception(server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 status, &exception));
2417 } while (exception.retry);
2418 return res;
2419}
2420
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002421static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2422 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002423 struct nfs4_state *state, struct nfs4_label *ilabel,
2424 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002425{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002426 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 struct nfs_setattrargs arg = {
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002428 .fh = NFS_FH(inode),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 .iap = sattr,
2430 .server = server,
2431 .bitmask = server->attr_bitmask,
David Quigley1775fd32013-05-22 12:50:42 -04002432 .label = ilabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 };
2434 struct nfs_setattrres res = {
2435 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04002436 .label = olabel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 .server = server,
2438 };
2439 struct rpc_message msg = {
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2441 .rpc_argp = &arg,
2442 .rpc_resp = &res,
2443 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444 };
Trond Myklebust26e976a2006-01-03 09:55:21 +01002445 unsigned long timestamp = jiffies;
Trond Myklebustee3ae842013-04-29 10:35:36 -04002446 fmode_t fmode;
2447 bool truncate;
Trond Myklebust65e43082005-08-16 11:49:44 -04002448 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449
David Quigleyaa9c2662013-05-22 12:50:44 -04002450 arg.bitmask = nfs4_bitmask(server, ilabel);
2451 if (ilabel)
2452 arg.bitmask = nfs4_bitmask(server, olabel);
2453
Trond Myklebust0e574af2005-10-27 22:12:38 -04002454 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455
Trond Myklebustee3ae842013-04-29 10:35:36 -04002456 /* Servers should only apply open mode checks for file size changes */
2457 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2458 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2459
2460 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2461 /* Use that stateid */
Trond Myklebust0418dae2014-03-04 13:48:16 -05002462 } else if (truncate && state != NULL) {
Trond Myklebust2a369152012-08-13 18:54:45 -04002463 struct nfs_lockowner lockowner = {
2464 .l_owner = current->files,
2465 .l_pid = current->tgid,
2466 };
Trond Myklebust0418dae2014-03-04 13:48:16 -05002467 if (!nfs4_valid_open_stateid(state))
2468 return -EBADF;
2469 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2470 &lockowner) == -EIO)
2471 return -EBADF;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00002472 } else
Trond Myklebustf597c532012-03-04 18:13:56 -05002473 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474
Bryan Schumaker7c513052011-03-24 17:12:24 +00002475 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002476 if (status == 0 && state != NULL)
2477 renew_lease(server, timestamp);
Trond Myklebust65e43082005-08-16 11:49:44 -04002478 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479}
2480
Trond Myklebust659bfcd2008-06-10 19:39:41 -04002481static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2482 struct nfs_fattr *fattr, struct iattr *sattr,
David Quigley1775fd32013-05-22 12:50:42 -04002483 struct nfs4_state *state, struct nfs4_label *ilabel,
2484 struct nfs4_label *olabel)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485{
Trond Myklebust3e4f6292006-03-20 13:44:46 -05002486 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002487 struct nfs4_exception exception = {
2488 .state = state,
Trond Myklebust3114ea72012-03-07 16:39:06 -05002489 .inode = inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05002490 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 int err;
2492 do {
David Quigley1775fd32013-05-22 12:50:42 -04002493 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
Trond Myklebustc1578b72013-08-12 16:58:42 -04002494 trace_nfs4_setattr(inode, err);
Trond Myklebust451146b2012-04-18 16:29:11 -04002495 switch (err) {
2496 case -NFS4ERR_OPENMODE:
Trond Myklebust721ccfb2013-04-29 11:11:58 -04002497 if (!(sattr->ia_valid & ATTR_SIZE)) {
2498 pr_warn_once("NFSv4: server %s is incorrectly "
2499 "applying open mode checks to "
2500 "a SETATTR that is not "
2501 "changing file size.\n",
2502 server->nfs_client->cl_hostname);
2503 }
Trond Myklebust451146b2012-04-18 16:29:11 -04002504 if (state && !(state->state & FMODE_WRITE)) {
2505 err = -EBADF;
2506 if (sattr->ia_valid & ATTR_OPEN)
2507 err = -EACCES;
2508 goto out;
2509 }
2510 }
2511 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 } while (exception.retry);
Trond Myklebust451146b2012-04-18 16:29:11 -04002513out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 return err;
2515}
2516
2517struct nfs4_closedata {
2518 struct inode *inode;
2519 struct nfs4_state *state;
2520 struct nfs_closeargs arg;
2521 struct nfs_closeres res;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002522 struct nfs_fattr fattr;
Trond Myklebust26e976a2006-01-03 09:55:21 +01002523 unsigned long timestamp;
Fred Isamanf7e89172011-01-06 11:36:32 +00002524 bool roc;
2525 u32 roc_barrier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526};
2527
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002528static void nfs4_free_closedata(void *data)
Trond Myklebust95121352005-10-18 14:20:12 -07002529{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002530 struct nfs4_closedata *calldata = data;
2531 struct nfs4_state_owner *sp = calldata->state->owner;
Al Viro643168c2011-06-22 18:20:23 -04002532 struct super_block *sb = calldata->state->inode->i_sb;
Trond Myklebust95121352005-10-18 14:20:12 -07002533
Fred Isamanf7e89172011-01-06 11:36:32 +00002534 if (calldata->roc)
2535 pnfs_roc_release(calldata->state->inode);
Trond Myklebust95121352005-10-18 14:20:12 -07002536 nfs4_put_open_state(calldata->state);
2537 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust95121352005-10-18 14:20:12 -07002538 nfs4_put_state_owner(sp);
Trond Myklebust322b2b92013-01-11 16:39:51 -05002539 nfs_sb_deactive(sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002540 kfree(calldata);
2541}
2542
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002543static void nfs4_close_done(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002545 struct nfs4_closedata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546 struct nfs4_state *state = calldata->state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547 struct nfs_server *server = NFS_SERVER(calldata->inode);
2548
Chuck Levera3ca5652012-03-01 17:00:40 -05002549 dprintk("%s: begin!\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04002550 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2551 return;
Trond Myklebust42113a72013-08-12 16:19:27 -04002552 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553 /* hmm. we are done with the inode, and in the process of freeing
2554 * the state_owner. we keep this around to process errors
2555 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556 switch (task->tk_status) {
2557 case 0:
Fred Isamanf7e89172011-01-06 11:36:32 +00002558 if (calldata->roc)
2559 pnfs_roc_set_barrier(state->inode,
2560 calldata->roc_barrier);
Trond Myklebust226056c2014-02-11 10:41:07 -05002561 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002562 renew_lease(server, calldata->timestamp);
Trond Myklebust226056c2014-02-11 10:41:07 -05002563 goto out_release;
Trond Myklebust69794ad2013-11-20 12:57:19 -05002564 case -NFS4ERR_ADMIN_REVOKED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 case -NFS4ERR_STALE_STATEID:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002566 case -NFS4ERR_OLD_STATEID:
2567 case -NFS4ERR_BAD_STATEID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568 case -NFS4ERR_EXPIRED:
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002569 if (calldata->arg.fmode == 0)
Trond Myklebust9e33bed2008-12-23 15:21:46 -05002570 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 default:
Trond Myklebust69794ad2013-11-20 12:57:19 -05002572 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
Trond Myklebust72211db2009-12-15 14:47:36 -05002573 rpc_restart_call_prepare(task);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002574 goto out_release;
2575 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 }
Trond Myklebust226056c2014-02-11 10:41:07 -05002577 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
Trond Myklebust69794ad2013-11-20 12:57:19 -05002578out_release:
Trond Myklebust72211db2009-12-15 14:47:36 -05002579 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebust516a6af2005-10-27 22:12:41 -04002580 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
Chuck Levera3ca5652012-03-01 17:00:40 -05002581 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582}
2583
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002584static void nfs4_close_prepare(struct rpc_task *task, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002586 struct nfs4_closedata *calldata = data;
Trond Myklebust95121352005-10-18 14:20:12 -07002587 struct nfs4_state *state = calldata->state;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002588 struct inode *inode = calldata->inode;
Trond Myklebust88069f72009-12-08 08:33:16 -05002589 int call_close = 0;
Trond Myklebust95121352005-10-18 14:20:12 -07002590
Chuck Levera3ca5652012-03-01 17:00:40 -05002591 dprintk("%s: begin!\n", __func__);
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002592 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002593 goto out_wait;
Trond Myklebust003707c2007-07-05 18:07:55 -04002594
Trond Myklebust88069f72009-12-08 08:33:16 -05002595 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2596 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002597 spin_lock(&state->owner->so_lock);
Trond Myklebust003707c2007-07-05 18:07:55 -04002598 /* Calculate the change in open mode */
Trond Myklebuste7616922006-01-03 09:55:13 +01002599 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -04002600 if (state->n_rdonly == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002601 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2602 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2603 calldata->arg.fmode &= ~FMODE_READ;
Trond Myklebust003707c2007-07-05 18:07:55 -04002604 }
2605 if (state->n_wronly == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002606 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2607 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2608 calldata->arg.fmode &= ~FMODE_WRITE;
Trond Myklebust003707c2007-07-05 18:07:55 -04002609 }
Trond Myklebuste7616922006-01-03 09:55:13 +01002610 }
Trond Myklebust5d422302013-03-14 16:57:48 -04002611 if (!nfs4_valid_open_stateid(state))
2612 call_close = 0;
Trond Myklebust4cecb762005-11-04 15:32:58 -05002613 spin_unlock(&state->owner->so_lock);
Trond Myklebust88069f72009-12-08 08:33:16 -05002614
2615 if (!call_close) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002616 /* Note: exit _without_ calling nfs4_close_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002617 goto out_no_action;
Trond Myklebust95121352005-10-18 14:20:12 -07002618 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002619
Fred Isamanf7e89172011-01-06 11:36:32 +00002620 if (calldata->arg.fmode == 0) {
Trond Myklebust88069f72009-12-08 08:33:16 -05002621 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
Fred Isamanf7e89172011-01-06 11:36:32 +00002622 if (calldata->roc &&
Andy Adamsonb9536ad2013-04-11 09:28:45 -04002623 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2624 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002625 goto out_wait;
Andy Adamsonb9536ad2013-04-11 09:28:45 -04002626 }
Fred Isamanf7e89172011-01-06 11:36:32 +00002627 }
Trond Myklebust88069f72009-12-08 08:33:16 -05002628
Trond Myklebust516a6af2005-10-27 22:12:41 -04002629 nfs_fattr_init(calldata->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01002630 calldata->timestamp = jiffies;
Trond Myklebust7fdab062012-09-20 20:15:57 -04002631 if (nfs4_setup_sequence(NFS_SERVER(inode),
Trond Myklebust9d12b212012-01-17 22:04:25 -05002632 &calldata->arg.seq_args,
2633 &calldata->res.seq_res,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04002634 task) != 0)
2635 nfs_release_seqid(calldata->arg.seqid);
Chuck Levera3ca5652012-03-01 17:00:40 -05002636 dprintk("%s: done!\n", __func__);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05002637 return;
2638out_no_action:
2639 task->tk_action = NULL;
2640out_wait:
2641 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642}
2643
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002644static const struct rpc_call_ops nfs4_close_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01002645 .rpc_call_prepare = nfs4_close_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01002646 .rpc_call_done = nfs4_close_done,
2647 .rpc_release = nfs4_free_closedata,
2648};
2649
Linus Torvalds1da177e2005-04-16 15:20:36 -07002650/*
2651 * It is possible for data to be read/written from a mem-mapped file
2652 * after the sys_close call (which hits the vfs layer as a flush).
2653 * This means that we can't safely call nfsv4 close on a file until
2654 * the inode is cleared. This in turn means that we are not good
2655 * NFSv4 citizens - we do not indicate to the server to update the file's
2656 * share state even when we are done with one of the three share
2657 * stateid's in the inode.
2658 *
2659 * NOTE: Caller must be holding the sp->so_owner semaphore!
2660 */
Trond Myklebust1f7977c2012-09-20 20:31:51 -04002661int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662{
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002663 struct nfs_server *server = NFS_SERVER(state->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002664 struct nfs4_closedata *calldata;
Trond Myklebustb39e6252007-06-11 23:05:07 -04002665 struct nfs4_state_owner *sp = state->owner;
2666 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04002667 struct rpc_message msg = {
2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2669 .rpc_cred = state->owner->so_cred,
2670 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04002671 struct rpc_task_setup task_setup_data = {
2672 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04002673 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002674 .callback_ops = &nfs4_close_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05002675 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04002676 .flags = RPC_TASK_ASYNC,
2677 };
Trond Myklebust95121352005-10-18 14:20:12 -07002678 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04002680 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2681 &task_setup_data.rpc_client, &msg);
2682
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002683 calldata = kzalloc(sizeof(*calldata), gfp_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 if (calldata == NULL)
Trond Myklebust95121352005-10-18 14:20:12 -07002685 goto out;
Chuck Levera9c92d62013-08-09 12:48:18 -04002686 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002687 calldata->inode = state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 calldata->state = state;
Trond Myklebust4a35bd42007-06-05 10:31:33 -04002689 calldata->arg.fh = NFS_FH(state->inode);
Trond Myklebust003707c2007-07-05 18:07:55 -04002690 calldata->arg.stateid = &state->open_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 /* Serialization for the sequence id */
Trond Myklebust8535b2b2010-05-13 12:51:01 -04002692 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
Trond Myklebust95121352005-10-18 14:20:12 -07002693 if (calldata->arg.seqid == NULL)
2694 goto out_free_calldata;
Trond Myklebustdc0b0272008-12-23 15:21:56 -05002695 calldata->arg.fmode = 0;
Trond Myklebusta65318b2009-03-11 14:10:28 -04002696 calldata->arg.bitmask = server->cache_consistency_bitmask;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002697 calldata->res.fattr = &calldata->fattr;
Trond Myklebustc1d51932008-04-07 13:20:54 -04002698 calldata->res.seqid = calldata->arg.seqid;
Trond Myklebust516a6af2005-10-27 22:12:41 -04002699 calldata->res.server = server;
Trond Myklebust1f7977c2012-09-20 20:31:51 -04002700 calldata->roc = pnfs_roc(state->inode);
Al Viro643168c2011-06-22 18:20:23 -04002701 nfs_sb_active(calldata->inode->i_sb);
Trond Myklebust95121352005-10-18 14:20:12 -07002702
Trond Myklebust1174dd12010-12-21 10:52:24 -05002703 msg.rpc_argp = &calldata->arg;
2704 msg.rpc_resp = &calldata->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04002705 task_setup_data.callback_data = calldata;
2706 task = rpc_run_task(&task_setup_data);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002707 if (IS_ERR(task))
2708 return PTR_ERR(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002709 status = 0;
2710 if (wait)
2711 status = rpc_wait_for_completion_task(task);
Trond Myklebustb39e6252007-06-11 23:05:07 -04002712 rpc_put_task(task);
Trond Myklebusta49c3c72007-10-18 18:03:27 -04002713 return status;
Trond Myklebust95121352005-10-18 14:20:12 -07002714out_free_calldata:
2715 kfree(calldata);
2716out:
Trond Myklebustb39e6252007-06-11 23:05:07 -04002717 nfs4_put_open_state(state);
2718 nfs4_put_state_owner(sp);
Trond Myklebust95121352005-10-18 14:20:12 -07002719 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720}
2721
Trond Myklebust2b484292010-09-17 10:56:51 -04002722static struct inode *
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002723nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2724 int open_flags, struct iattr *attr, int *opened)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 struct nfs4_state *state;
David Quigleyaa9c2662013-05-22 12:50:44 -04002727 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2728
2729 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730
Trond Myklebust565277f2007-10-15 18:17:53 -04002731 /* Protect against concurrent sillydeletes */
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04002732 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
David Quigleyaa9c2662013-05-22 12:50:44 -04002733
2734 nfs4_label_release_security(label);
2735
Trond Myklebustf46e0bd2010-09-17 10:56:50 -04002736 if (IS_ERR(state))
2737 return ERR_CAST(state);
Trond Myklebust275bb302013-05-29 13:11:28 -04002738 return state->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739}
2740
Trond Myklebust1185a552009-12-03 15:54:02 -05002741static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002742{
2743 if (ctx->state == NULL)
2744 return;
2745 if (is_sync)
Al Viro643168c2011-06-22 18:20:23 -04002746 nfs4_close_sync(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002747 else
Al Viro643168c2011-06-22 18:20:23 -04002748 nfs4_close_state(ctx->state, ctx->mode);
Trond Myklebust7fe5c392009-03-19 15:35:50 -04002749}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002750
Trond Myklebustb944dba2013-11-04 15:20:20 -05002751#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2752#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
J. Bruce Fields999e5682014-06-03 17:33:35 -04002753#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
Trond Myklebustb944dba2013-11-04 15:20:20 -05002754
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2756{
Benny Halevy43652ad2009-04-01 09:21:54 -04002757 struct nfs4_server_caps_arg args = {
2758 .fhandle = fhandle,
2759 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 struct nfs4_server_caps_res res = {};
2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
Benny Halevy43652ad2009-04-01 09:21:54 -04002763 .rpc_argp = &args,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 .rpc_resp = &res,
2765 };
2766 int status;
2767
Bryan Schumaker7c513052011-03-24 17:12:24 +00002768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769 if (status == 0) {
Trond Myklebustb944dba2013-11-04 15:20:20 -05002770 /* Sanity check the server answers */
2771 switch (server->nfs_client->cl_minorversion) {
2772 case 0:
2773 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2774 res.attr_bitmask[2] = 0;
2775 break;
2776 case 1:
2777 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2778 break;
2779 case 2:
2780 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2781 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
Trond Myklebust62ab460c2009-08-09 15:06:19 -04002783 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2784 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2785 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2786 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
Trond Myklebustb944dba2013-11-04 15:20:20 -05002787 NFS_CAP_CTIME|NFS_CAP_MTIME|
2788 NFS_CAP_SECURITY_LABEL);
Malahal Naineni7dd7d952014-01-23 08:54:55 -06002789 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2790 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 server->caps |= NFS_CAP_ACLS;
2792 if (res.has_links != 0)
2793 server->caps |= NFS_CAP_HARDLINKS;
2794 if (res.has_symlinks != 0)
2795 server->caps |= NFS_CAP_SYMLINKS;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04002796 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2797 server->caps |= NFS_CAP_FILEID;
2798 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2799 server->caps |= NFS_CAP_MODE;
2800 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2801 server->caps |= NFS_CAP_NLINK;
2802 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2803 server->caps |= NFS_CAP_OWNER;
2804 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2805 server->caps |= NFS_CAP_OWNER_GROUP;
2806 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2807 server->caps |= NFS_CAP_ATIME;
2808 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2809 server->caps |= NFS_CAP_CTIME;
2810 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2811 server->caps |= NFS_CAP_MTIME;
David Quigleyaa9c2662013-05-22 12:50:44 -04002812#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2813 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2814 server->caps |= NFS_CAP_SECURITY_LABEL;
2815#endif
2816 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2817 sizeof(server->attr_bitmask));
Trond Myklebustb944dba2013-11-04 15:20:20 -05002818 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04002819
Trond Myklebusta65318b2009-03-11 14:10:28 -04002820 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2821 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2822 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
Trond Myklebustb944dba2013-11-04 15:20:20 -05002823 server->cache_consistency_bitmask[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002824 server->acl_bitmask = res.acl_bitmask;
Chuck Lever264e6352012-03-01 17:02:05 -05002825 server->fh_expire_type = res.fh_expire_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002826 }
Andy Adamsoncccef3b2009-04-01 09:22:03 -04002827
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828 return status;
2829}
2830
Trond Myklebust55a97592006-06-09 09:34:19 -04002831int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832{
2833 struct nfs4_exception exception = { };
2834 int err;
2835 do {
2836 err = nfs4_handle_exception(server,
2837 _nfs4_server_capabilities(server, fhandle),
2838 &exception);
2839 } while (exception.retry);
2840 return err;
2841}
2842
2843static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2844 struct nfs_fsinfo *info)
2845{
David Quigleyaa9c2662013-05-22 12:50:44 -04002846 u32 bitmask[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002847 struct nfs4_lookup_root_arg args = {
David Quigleyaa9c2662013-05-22 12:50:44 -04002848 .bitmask = bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849 };
2850 struct nfs4_lookup_res res = {
2851 .server = server,
Trond Myklebust0e574af2005-10-27 22:12:38 -04002852 .fattr = info->fattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853 .fh = fhandle,
2854 };
2855 struct rpc_message msg = {
2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2857 .rpc_argp = &args,
2858 .rpc_resp = &res,
2859 };
Benny Halevy008f55d2009-04-01 09:22:50 -04002860
David Quigleyaa9c2662013-05-22 12:50:44 -04002861 bitmask[0] = nfs4_fattr_bitmap[0];
2862 bitmask[1] = nfs4_fattr_bitmap[1];
2863 /*
2864 * Process the label in the upcoming getfattr
2865 */
2866 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2867
Trond Myklebust0e574af2005-10-27 22:12:38 -04002868 nfs_fattr_init(info->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00002869 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870}
2871
2872static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2873 struct nfs_fsinfo *info)
2874{
2875 struct nfs4_exception exception = { };
2876 int err;
2877 do {
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002878 err = _nfs4_lookup_root(server, fhandle, info);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04002879 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002880 switch (err) {
2881 case 0:
2882 case -NFS4ERR_WRONGSEC:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04002883 goto out;
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002884 default:
2885 err = nfs4_handle_exception(server, err, &exception);
2886 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002887 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04002888out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002889 return err;
2890}
2891
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002892static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2893 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2894{
Trond Myklebustc2190662013-08-26 19:23:04 -04002895 struct rpc_auth_create_args auth_args = {
2896 .pseudoflavor = flavor,
2897 };
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002898 struct rpc_auth *auth;
2899 int ret;
2900
Trond Myklebustc2190662013-08-26 19:23:04 -04002901 auth = rpcauth_create(&auth_args, server->client);
Wei Yongjune8d920c2012-09-21 12:27:41 +08002902 if (IS_ERR(auth)) {
Chuck Lever75bc8822013-03-16 15:55:36 -04002903 ret = -EACCES;
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002904 goto out;
2905 }
2906 ret = nfs4_lookup_root(server, fhandle, info);
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002907out:
2908 return ret;
2909}
2910
Chuck Lever9a744ba2013-03-16 15:56:02 -04002911/*
2912 * Retry pseudoroot lookup with various security flavors. We do this when:
2913 *
2914 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2915 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2916 *
2917 * Returns zero on success, or a negative NFS4ERR value, or a
2918 * negative errno value.
2919 */
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04002920static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
David Howells54ceac42006-08-22 20:06:13 -04002921 struct nfs_fsinfo *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922{
Chuck Lever9a744ba2013-03-16 15:56:02 -04002923 /* Per 3530bis 15.33.5 */
2924 static const rpc_authflavor_t flav_array[] = {
2925 RPC_AUTH_GSS_KRB5P,
2926 RPC_AUTH_GSS_KRB5I,
2927 RPC_AUTH_GSS_KRB5,
Chuck Leverc4eafe12013-03-16 15:56:11 -04002928 RPC_AUTH_UNIX, /* courtesy */
Chuck Lever9a744ba2013-03-16 15:56:02 -04002929 RPC_AUTH_NULL,
2930 };
2931 int status = -EPERM;
2932 size_t i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04002934 if (server->auth_info.flavor_len > 0) {
2935 /* try each flavor specified by user */
2936 for (i = 0; i < server->auth_info.flavor_len; i++) {
2937 status = nfs4_lookup_root_sec(server, fhandle, info,
2938 server->auth_info.flavors[i]);
2939 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2940 continue;
2941 break;
2942 }
2943 } else {
2944 /* no flavors specified by user, try default list */
2945 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2946 status = nfs4_lookup_root_sec(server, fhandle, info,
2947 flav_array[i]);
2948 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2949 continue;
2950 break;
2951 }
Bryan Schumaker8f70e952011-03-24 17:12:31 +00002952 }
Chuck Lever9a744ba2013-03-16 15:56:02 -04002953
Bryan Schumakerfb8a5ba2011-04-18 16:52:25 -04002954 /*
2955 * -EACCESS could mean that the user doesn't have correct permissions
2956 * to access the mount. It could also mean that we tried to mount
2957 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2958 * existing mount programs don't handle -EACCES very well so it should
2959 * be mapped to -EPERM instead.
2960 */
2961 if (status == -EACCES)
2962 status = -EPERM;
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04002963 return status;
2964}
2965
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04002966static int nfs4_do_find_root_sec(struct nfs_server *server,
2967 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2968{
2969 int mv = server->nfs_client->cl_minorversion;
2970 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2971}
2972
2973/**
2974 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2975 * @server: initialized nfs_server handle
2976 * @fhandle: we fill in the pseudo-fs root file handle
2977 * @info: we fill in an FSINFO struct
Trond Myklebust5e6b1992013-09-07 12:58:57 -04002978 * @auth_probe: probe the auth flavours
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04002979 *
2980 * Returns zero on success, or a negative errno.
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04002981 */
Bryan Schumaker3028eb22012-05-10 15:07:30 -04002982int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
Trond Myklebust5e6b1992013-09-07 12:58:57 -04002983 struct nfs_fsinfo *info,
2984 bool auth_probe)
Bryan Schumaker801a16dc2011-04-13 14:31:30 -04002985{
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04002986 int status;
2987
Trond Myklebust5e6b1992013-09-07 12:58:57 -04002988 switch (auth_probe) {
2989 case false:
2990 status = nfs4_lookup_root(server, fhandle, info);
2991 if (status != -NFS4ERR_WRONGSEC)
2992 break;
Trond Myklebust5e6b1992013-09-07 12:58:57 -04002993 default:
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04002994 status = nfs4_do_find_root_sec(server, fhandle, info);
Trond Myklebust5e6b1992013-09-07 12:58:57 -04002995 }
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04002996
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 if (status == 0)
2998 status = nfs4_server_capabilities(server, fhandle);
2999 if (status == 0)
3000 status = nfs4_do_fsinfo(server, fhandle, info);
Chuck Lever2ed4b95b2013-03-16 15:55:45 -04003001
Trond Myklebustc12e87f2006-03-13 21:20:47 -08003002 return nfs4_map_errors(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003}
3004
Bryan Schumakerbae36242012-05-10 15:07:31 -04003005static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3006 struct nfs_fsinfo *info)
3007{
3008 int error;
3009 struct nfs_fattr *fattr = info->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003010 struct nfs4_label *label = NULL;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003011
3012 error = nfs4_server_capabilities(server, mntfh);
3013 if (error < 0) {
3014 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3015 return error;
3016 }
3017
David Quigley14c43f72013-05-22 12:50:43 -04003018 label = nfs4_label_alloc(server, GFP_KERNEL);
3019 if (IS_ERR(label))
3020 return PTR_ERR(label);
3021
David Quigley1775fd32013-05-22 12:50:42 -04003022 error = nfs4_proc_getattr(server, mntfh, fattr, label);
Bryan Schumakerbae36242012-05-10 15:07:31 -04003023 if (error < 0) {
3024 dprintk("nfs4_get_root: getattr error = %d\n", -error);
David Quigley14c43f72013-05-22 12:50:43 -04003025 goto err_free_label;
Bryan Schumakerbae36242012-05-10 15:07:31 -04003026 }
3027
3028 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3029 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3030 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3031
David Quigley14c43f72013-05-22 12:50:43 -04003032err_free_label:
3033 nfs4_label_free(label);
3034
Bryan Schumakerbae36242012-05-10 15:07:31 -04003035 return error;
3036}
3037
Manoj Naik6b97fd32006-06-09 09:34:29 -04003038/*
3039 * Get locations and (maybe) other attributes of a referral.
3040 * Note that we'll actually follow the referral later when
3041 * we detect fsid mismatch in inode revalidation
3042 */
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003043static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3044 const struct qstr *name, struct nfs_fattr *fattr,
3045 struct nfs_fh *fhandle)
Manoj Naik6b97fd32006-06-09 09:34:29 -04003046{
3047 int status = -ENOMEM;
3048 struct page *page = NULL;
3049 struct nfs4_fs_locations *locations = NULL;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003050
3051 page = alloc_page(GFP_KERNEL);
3052 if (page == NULL)
3053 goto out;
3054 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3055 if (locations == NULL)
3056 goto out;
3057
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003058 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003059 if (status != 0)
3060 goto out;
Chuck Lever519ae252013-10-17 14:13:19 -04003061
3062 /*
3063 * If the fsid didn't change, this is a migration event, not a
3064 * referral. Cause us to drop into the exception handler, which
3065 * will kick off migration recovery.
3066 */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003067 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
Andy Adamson533eb462011-06-13 18:25:56 -04003068 dprintk("%s: server did not return a different fsid for"
3069 " a referral at %s\n", __func__, name->name);
Chuck Lever519ae252013-10-17 14:13:19 -04003070 status = -NFS4ERR_MOVED;
Manoj Naik6b97fd32006-06-09 09:34:29 -04003071 goto out;
3072 }
Andy Adamson533eb462011-06-13 18:25:56 -04003073 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3074 nfs_fixup_referral_attributes(&locations->fattr);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003075
Andy Adamson533eb462011-06-13 18:25:56 -04003076 /* replace the lookup nfs_fattr with the locations nfs_fattr */
Manoj Naik6b97fd32006-06-09 09:34:29 -04003077 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
Manoj Naik6b97fd32006-06-09 09:34:29 -04003078 memset(fhandle, 0, sizeof(struct nfs_fh));
3079out:
3080 if (page)
3081 __free_page(page);
Davidlohr Bueso5d7ca352010-08-11 12:42:15 -04003082 kfree(locations);
Manoj Naik6b97fd32006-06-09 09:34:29 -04003083 return status;
3084}
3085
David Quigley1775fd32013-05-22 12:50:42 -04003086static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3087 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088{
3089 struct nfs4_getattr_arg args = {
3090 .fh = fhandle,
3091 .bitmask = server->attr_bitmask,
3092 };
3093 struct nfs4_getattr_res res = {
3094 .fattr = fattr,
David Quigley1775fd32013-05-22 12:50:42 -04003095 .label = label,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003096 .server = server,
3097 };
3098 struct rpc_message msg = {
3099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3100 .rpc_argp = &args,
3101 .rpc_resp = &res,
3102 };
David Quigleyaa9c2662013-05-22 12:50:44 -04003103
3104 args.bitmask = nfs4_bitmask(server, label);
3105
Trond Myklebust0e574af2005-10-27 22:12:38 -04003106 nfs_fattr_init(fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003107 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108}
3109
David Quigley1775fd32013-05-22 12:50:42 -04003110static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3111 struct nfs_fattr *fattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112{
3113 struct nfs4_exception exception = { };
3114 int err;
3115 do {
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003116 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3117 trace_nfs4_getattr(server, fhandle, fattr, err);
3118 err = nfs4_handle_exception(server, err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124/*
3125 * The file is not closed if it is opened due to the a request to change
3126 * the size of the file. The open call will not be needed once the
3127 * VFS layer lookup-intents are implemented.
3128 *
3129 * Close is called when the inode is destroyed.
3130 * If we haven't opened the file for O_WRONLY, we
3131 * need to in the size_change case to obtain a stateid.
3132 *
3133 * Got race?
3134 * Because OPEN is always done by name in nfsv4, it is
3135 * possible that we opened a different file by the same
3136 * name. We can recognize this race condition, but we
3137 * can't do anything about it besides returning an error.
3138 *
3139 * This will be fixed with VFS changes (lookup-intent).
3140 */
3141static int
3142nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3143 struct iattr *sattr)
3144{
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003145 struct inode *inode = dentry->d_inode;
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003146 struct rpc_cred *cred = NULL;
Trond Myklebustd5308382005-11-04 15:33:38 -05003147 struct nfs4_state *state = NULL;
David Quigley14c43f72013-05-22 12:50:43 -04003148 struct nfs4_label *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003149 int status;
3150
Benny Halevy8a1636c2010-07-14 15:43:57 -04003151 if (pnfs_ld_layoutret_on_setattr(inode))
Trond Myklebust24028672013-03-20 13:23:33 -04003152 pnfs_commit_and_return_layout(inode);
Benny Halevy8a1636c2010-07-14 15:43:57 -04003153
Trond Myklebust0e574af2005-10-27 22:12:38 -04003154 nfs_fattr_init(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003155
Andy Adamson26699402012-05-30 16:12:24 -04003156 /* Deal with open(O_TRUNC) */
3157 if (sattr->ia_valid & ATTR_OPEN)
Nadav Shemercc7936f2013-07-21 17:21:43 +03003158 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
Andy Adamson26699402012-05-30 16:12:24 -04003159
3160 /* Optimization: if the end result is no change, don't RPC */
Nadav Shemercc7936f2013-07-21 17:21:43 +03003161 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
Andy Adamson26699402012-05-30 16:12:24 -04003162 return 0;
3163
Trond Myklebustd5308382005-11-04 15:33:38 -05003164 /* Search for an existing open(O_WRITE) file */
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003165 if (sattr->ia_valid & ATTR_FILE) {
3166 struct nfs_open_context *ctx;
Trond Myklebust08e9eac2005-06-22 17:16:29 +00003167
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003168 ctx = nfs_file_open_context(sattr->ia_file);
Neil Brown504e5182008-10-16 14:15:16 +11003169 if (ctx) {
3170 cred = ctx->cred;
3171 state = ctx->state;
3172 }
Trond Myklebust659bfcd2008-06-10 19:39:41 -04003173 }
3174
David Quigley14c43f72013-05-22 12:50:43 -04003175 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3176 if (IS_ERR(label))
3177 return PTR_ERR(label);
3178
3179 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
David Quigleyaa9c2662013-05-22 12:50:44 -04003180 if (status == 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -04003181 nfs_setattr_update_inode(inode, sattr);
David Quigleyaa9c2662013-05-22 12:50:44 -04003182 nfs_setsecurity(inode, fattr, label);
3183 }
David Quigley14c43f72013-05-22 12:50:43 -04003184 nfs4_label_free(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185 return status;
3186}
3187
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003188static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3189 const struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003190 struct nfs_fattr *fattr, struct nfs4_label *label)
David Howells2b3de442006-08-22 20:06:09 -04003191{
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003192 struct nfs_server *server = NFS_SERVER(dir);
David Howells2b3de442006-08-22 20:06:09 -04003193 int status;
3194 struct nfs4_lookup_arg args = {
3195 .bitmask = server->attr_bitmask,
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003196 .dir_fh = NFS_FH(dir),
David Howells2b3de442006-08-22 20:06:09 -04003197 .name = name,
3198 };
3199 struct nfs4_lookup_res res = {
3200 .server = server,
3201 .fattr = fattr,
David Quigleyaa9c2662013-05-22 12:50:44 -04003202 .label = label,
David Howells2b3de442006-08-22 20:06:09 -04003203 .fh = fhandle,
3204 };
3205 struct rpc_message msg = {
3206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3207 .rpc_argp = &args,
3208 .rpc_resp = &res,
3209 };
3210
David Quigleyaa9c2662013-05-22 12:50:44 -04003211 args.bitmask = nfs4_bitmask(server, label);
3212
David Howells2b3de442006-08-22 20:06:09 -04003213 nfs_fattr_init(fattr);
3214
Linus Torvalds1da177e2005-04-16 15:20:36 -07003215 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003216 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217 dprintk("NFS reply lookup: %d\n", status);
3218 return status;
3219}
3220
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003221static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003222{
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003223 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003224 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
Bryan Schumaker7ebb9312011-03-24 17:12:30 +00003225 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3226 fattr->nlink = 2;
3227}
3228
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003229static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3230 struct qstr *name, struct nfs_fh *fhandle,
David Quigley1775fd32013-05-22 12:50:42 -04003231 struct nfs_fattr *fattr, struct nfs4_label *label)
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003232{
3233 struct nfs4_exception exception = { };
3234 struct rpc_clnt *client = *clnt;
3235 int err;
3236 do {
David Quigley1775fd32013-05-22 12:50:42 -04003237 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003238 trace_nfs4_lookup(dir, name, err);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003239 switch (err) {
3240 case -NFS4ERR_BADNAME:
3241 err = -ENOENT;
3242 goto out;
3243 case -NFS4ERR_MOVED:
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003244 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003245 goto out;
3246 case -NFS4ERR_WRONGSEC:
3247 err = -EPERM;
3248 if (client != *clnt)
3249 goto out;
Andy Adamson66b06862014-06-12 15:02:32 -04003250 client = nfs4_negotiate_security(client, dir, name);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003251 if (IS_ERR(client))
3252 return PTR_ERR(client);
3253
3254 exception.retry = 1;
3255 break;
3256 default:
3257 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3258 }
3259 } while (exception.retry);
3260
3261out:
3262 if (err == 0)
3263 *clnt = client;
3264 else if (client != *clnt)
3265 rpc_shutdown_client(client);
3266
3267 return err;
3268}
3269
Bryan Schumaker80a16b22012-04-27 13:27:46 -04003270static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
David Quigley1775fd32013-05-22 12:50:42 -04003271 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3272 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003273{
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003274 int status;
3275 struct rpc_clnt *client = NFS_CLIENT(dir);
Trond Myklebust0c2e53f2011-10-18 16:11:22 -07003276
David Quigley1775fd32013-05-22 12:50:42 -04003277 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
Bryan Schumaker72de53e2012-04-27 13:27:40 -04003278 if (client != NFS_CLIENT(dir)) {
3279 rpc_shutdown_client(client);
3280 nfs_fixup_secinfo_attributes(fattr);
3281 }
3282 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283}
3284
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003285struct rpc_clnt *
3286nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3287 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3288{
Trond Myklebustb72888c2013-08-07 20:38:07 -04003289 struct rpc_clnt *client = NFS_CLIENT(dir);
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003290 int status;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003291
David Quigley1775fd32013-05-22 12:50:42 -04003292 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003293 if (status < 0)
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003294 return ERR_PTR(status);
Trond Myklebustb72888c2013-08-07 20:38:07 -04003295 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04003296}
3297
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3299{
Trond Myklebust76b32992007-08-10 17:45:11 -04003300 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301 struct nfs4_accessargs args = {
3302 .fh = NFS_FH(inode),
Trond Myklebusta4980e72012-01-30 15:43:56 -05003303 .bitmask = server->cache_consistency_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003304 };
Trond Myklebust76b32992007-08-10 17:45:11 -04003305 struct nfs4_accessres res = {
3306 .server = server,
Trond Myklebust76b32992007-08-10 17:45:11 -04003307 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308 struct rpc_message msg = {
3309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3310 .rpc_argp = &args,
3311 .rpc_resp = &res,
3312 .rpc_cred = entry->cred,
3313 };
3314 int mode = entry->mask;
David Quigleyaa9c2662013-05-22 12:50:44 -04003315 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003316
3317 /*
3318 * Determine which access bits we want to ask for...
3319 */
3320 if (mode & MAY_READ)
3321 args.access |= NFS4_ACCESS_READ;
3322 if (S_ISDIR(inode->i_mode)) {
3323 if (mode & MAY_WRITE)
3324 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3325 if (mode & MAY_EXEC)
3326 args.access |= NFS4_ACCESS_LOOKUP;
3327 } else {
3328 if (mode & MAY_WRITE)
3329 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3330 if (mode & MAY_EXEC)
3331 args.access |= NFS4_ACCESS_EXECUTE;
3332 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003333
3334 res.fattr = nfs_alloc_fattr();
3335 if (res.fattr == NULL)
3336 return -ENOMEM;
3337
Bryan Schumaker7c513052011-03-24 17:12:24 +00003338 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003339 if (!status) {
Weston Andros Adamson6168f622012-09-10 14:00:46 -04003340 nfs_access_set_mask(entry, res.access);
Trond Myklebustc407d412010-04-16 16:22:48 -04003341 nfs_refresh_inode(inode, res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003342 }
Trond Myklebustc407d412010-04-16 16:22:48 -04003343 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003344 return status;
3345}
3346
3347static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3348{
3349 struct nfs4_exception exception = { };
3350 int err;
3351 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003352 err = _nfs4_proc_access(inode, entry);
3353 trace_nfs4_access(inode, err);
3354 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355 &exception);
3356 } while (exception.retry);
3357 return err;
3358}
3359
3360/*
3361 * TODO: For the time being, we don't try to get any attributes
3362 * along with any of the zero-copy operations READ, READDIR,
3363 * READLINK, WRITE.
3364 *
3365 * In the case of the first three, we want to put the GETATTR
3366 * after the read-type operation -- this is because it is hard
3367 * to predict the length of a GETATTR response in v4, and thus
3368 * align the READ data correctly. This means that the GETATTR
3369 * may end up partially falling into the page cache, and we should
3370 * shift it into the 'tail' of the xdr_buf before processing.
3371 * To do this efficiently, we need to know the total length
3372 * of data received, which doesn't seem to be available outside
3373 * of the RPC layer.
3374 *
3375 * In the case of WRITE, we also want to put the GETATTR after
3376 * the operation -- in this case because we want to make sure
Trond Myklebust140150d2012-06-05 15:20:25 -04003377 * we get the post-operation mtime and size.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 *
3379 * Both of these changes to the XDR layer would in fact be quite
3380 * minor, but I decided to leave them for a subsequent patch.
3381 */
3382static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3383 unsigned int pgbase, unsigned int pglen)
3384{
3385 struct nfs4_readlink args = {
3386 .fh = NFS_FH(inode),
3387 .pgbase = pgbase,
3388 .pglen = pglen,
3389 .pages = &page,
3390 };
Benny Halevyf50c7002009-04-01 09:21:55 -04003391 struct nfs4_readlink_res res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392 struct rpc_message msg = {
3393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3394 .rpc_argp = &args,
Benny Halevyf50c7002009-04-01 09:21:55 -04003395 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 };
3397
Bryan Schumaker7c513052011-03-24 17:12:24 +00003398 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399}
3400
3401static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3402 unsigned int pgbase, unsigned int pglen)
3403{
3404 struct nfs4_exception exception = { };
3405 int err;
3406 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003407 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3408 trace_nfs4_readlink(inode, err);
3409 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410 &exception);
3411 } while (exception.retry);
3412 return err;
3413}
3414
Linus Torvalds1da177e2005-04-16 15:20:36 -07003415/*
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003416 * This is just for mknod. open(O_CREAT) will always do ->open_context().
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003418static int
3419nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003420 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003421{
David Quigleyaa9c2662013-05-22 12:50:44 -04003422 struct nfs4_label l, *ilabel = NULL;
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003423 struct nfs_open_context *ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003424 struct nfs4_state *state;
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04003425 int opened = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003426 int status = 0;
3427
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003428 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3429 if (IS_ERR(ctx))
3430 return PTR_ERR(ctx);
3431
David Quigleyaa9c2662013-05-22 12:50:44 -04003432 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3433
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003434 sattr->ia_mode &= ~current_umask();
Trond Myklebust5bc2afc2013-09-23 18:01:28 -04003435 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436 if (IS_ERR(state)) {
3437 status = PTR_ERR(state);
Trond Myklebustc0204fd2010-09-17 10:56:51 -04003438 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440out:
David Quigleyaa9c2662013-05-22 12:50:44 -04003441 nfs4_label_release_security(ilabel);
Miklos Szeredi8867fe52012-06-05 15:10:19 +02003442 put_nfs_open_context(ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443 return status;
3444}
3445
3446static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3447{
Trond Myklebust16e42952005-10-27 22:12:44 -04003448 struct nfs_server *server = NFS_SERVER(dir);
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003449 struct nfs_removeargs args = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450 .fh = NFS_FH(dir),
Linus Torvalds26fe5752012-05-10 13:14:12 -07003451 .name = *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003453 struct nfs_removeres res = {
Trond Myklebust16e42952005-10-27 22:12:44 -04003454 .server = server,
Trond Myklebust16e42952005-10-27 22:12:44 -04003455 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 struct rpc_message msg = {
Trond Myklebust4fdc17b2007-07-14 15:39:57 -04003457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3458 .rpc_argp = &args,
3459 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003460 };
Trond Myklebust778d2812012-04-27 13:48:19 -04003461 int status;
Trond Myklebustd3468902010-04-16 16:22:50 -04003462
Bryan Schumaker7c513052011-03-24 17:12:24 +00003463 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
Trond Myklebust778d2812012-04-27 13:48:19 -04003464 if (status == 0)
Trond Myklebust16e42952005-10-27 22:12:44 -04003465 update_changeattr(dir, &res.cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003466 return status;
3467}
3468
3469static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3470{
3471 struct nfs4_exception exception = { };
3472 int err;
3473 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003474 err = _nfs4_proc_remove(dir, name);
3475 trace_nfs4_remove(dir, name, err);
3476 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477 &exception);
3478 } while (exception.retry);
3479 return err;
3480}
3481
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003482static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003484 struct nfs_server *server = NFS_SERVER(dir);
3485 struct nfs_removeargs *args = msg->rpc_argp;
3486 struct nfs_removeres *res = msg->rpc_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003487
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003488 res->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003489 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
Chuck Levera9c92d62013-08-09 12:48:18 -04003490 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04003491
3492 nfs_fattr_init(res->dir_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493}
3494
Bryan Schumaker34e137c2012-03-19 14:54:41 -04003495static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3496{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003497 nfs4_setup_sequence(NFS_SERVER(data->dir),
3498 &data->args.seq_args,
3499 &data->res.seq_res,
3500 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003501}
3502
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003503static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504{
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003505 struct nfs_unlinkdata *data = task->tk_calldata;
3506 struct nfs_removeres *res = &data->res;
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003507
Trond Myklebust14516c32010-07-31 14:29:06 -04003508 if (!nfs4_sequence_done(task, &res->seq_res))
3509 return 0;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05003510 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003511 return 0;
3512 update_changeattr(dir, &res->cinfo);
Trond Myklebuste4eff1a2007-07-14 15:39:58 -04003513 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514}
3515
Jeff Laytond3d41522010-09-17 17:31:57 -04003516static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3517{
3518 struct nfs_server *server = NFS_SERVER(dir);
3519 struct nfs_renameargs *arg = msg->rpc_argp;
3520 struct nfs_renameres *res = msg->rpc_resp;
3521
3522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
Jeff Laytond3d41522010-09-17 17:31:57 -04003523 res->server = server;
Chuck Levera9c92d62013-08-09 12:48:18 -04003524 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
Jeff Laytond3d41522010-09-17 17:31:57 -04003525}
3526
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04003527static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3528{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04003529 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3530 &data->args.seq_args,
3531 &data->res.seq_res,
3532 task);
Jeff Laytond3d41522010-09-17 17:31:57 -04003533}
3534
3535static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3536 struct inode *new_dir)
3537{
Trond Myklebustfbc6f7c2013-08-12 17:08:26 -04003538 struct nfs_renamedata *data = task->tk_calldata;
3539 struct nfs_renameres *res = &data->res;
Jeff Laytond3d41522010-09-17 17:31:57 -04003540
3541 if (!nfs4_sequence_done(task, &res->seq_res))
3542 return 0;
3543 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3544 return 0;
3545
3546 update_changeattr(old_dir, &res->old_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003547 update_changeattr(new_dir, &res->new_cinfo);
Jeff Laytond3d41522010-09-17 17:31:57 -04003548 return 1;
3549}
3550
Linus Torvalds1da177e2005-04-16 15:20:36 -07003551static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3552{
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003553 struct nfs_server *server = NFS_SERVER(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 struct nfs4_link_arg arg = {
3555 .fh = NFS_FH(inode),
3556 .dir_fh = NFS_FH(dir),
3557 .name = name,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003558 .bitmask = server->attr_bitmask,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003559 };
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003560 struct nfs4_link_res res = {
3561 .server = server,
David Quigley1775fd32013-05-22 12:50:42 -04003562 .label = NULL,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003563 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564 struct rpc_message msg = {
3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3566 .rpc_argp = &arg,
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003567 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003568 };
Trond Myklebust136f2622010-04-16 16:22:49 -04003569 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003570
Trond Myklebust136f2622010-04-16 16:22:49 -04003571 res.fattr = nfs_alloc_fattr();
Trond Myklebust778d2812012-04-27 13:48:19 -04003572 if (res.fattr == NULL)
Trond Myklebust136f2622010-04-16 16:22:49 -04003573 goto out;
3574
David Quigley14c43f72013-05-22 12:50:43 -04003575 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3576 if (IS_ERR(res.label)) {
3577 status = PTR_ERR(res.label);
3578 goto out;
3579 }
David Quigleyaa9c2662013-05-22 12:50:44 -04003580 arg.bitmask = nfs4_bitmask(server, res.label);
David Quigley14c43f72013-05-22 12:50:43 -04003581
Bryan Schumaker7c513052011-03-24 17:12:24 +00003582 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003583 if (!status) {
3584 update_changeattr(dir, &res.cinfo);
David Quigleyaa9c2662013-05-22 12:50:44 -04003585 status = nfs_post_op_update_inode(inode, res.fattr);
3586 if (!status)
3587 nfs_setsecurity(inode, res.fattr, res.label);
Trond Myklebust91ba2ee2005-10-27 22:12:42 -04003588 }
David Quigley14c43f72013-05-22 12:50:43 -04003589
3590
3591 nfs4_label_free(res.label);
3592
Trond Myklebust136f2622010-04-16 16:22:49 -04003593out:
Trond Myklebust136f2622010-04-16 16:22:49 -04003594 nfs_free_fattr(res.fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595 return status;
3596}
3597
3598static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3599{
3600 struct nfs4_exception exception = { };
3601 int err;
3602 do {
3603 err = nfs4_handle_exception(NFS_SERVER(inode),
3604 _nfs4_proc_link(inode, dir, name),
3605 &exception);
3606 } while (exception.retry);
3607 return err;
3608}
3609
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003610struct nfs4_createdata {
3611 struct rpc_message msg;
3612 struct nfs4_create_arg arg;
3613 struct nfs4_create_res res;
3614 struct nfs_fh fh;
3615 struct nfs_fattr fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003616 struct nfs4_label *label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003617};
3618
3619static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3620 struct qstr *name, struct iattr *sattr, u32 ftype)
3621{
3622 struct nfs4_createdata *data;
3623
3624 data = kzalloc(sizeof(*data), GFP_KERNEL);
3625 if (data != NULL) {
3626 struct nfs_server *server = NFS_SERVER(dir);
3627
David Quigley14c43f72013-05-22 12:50:43 -04003628 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3629 if (IS_ERR(data->label))
3630 goto out_free;
3631
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003632 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3633 data->msg.rpc_argp = &data->arg;
3634 data->msg.rpc_resp = &data->res;
3635 data->arg.dir_fh = NFS_FH(dir);
3636 data->arg.server = server;
3637 data->arg.name = name;
3638 data->arg.attrs = sattr;
3639 data->arg.ftype = ftype;
David Quigleyaa9c2662013-05-22 12:50:44 -04003640 data->arg.bitmask = nfs4_bitmask(server, data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003641 data->res.server = server;
3642 data->res.fh = &data->fh;
3643 data->res.fattr = &data->fattr;
David Quigley1775fd32013-05-22 12:50:42 -04003644 data->res.label = data->label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003645 nfs_fattr_init(data->res.fattr);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003646 }
3647 return data;
David Quigley14c43f72013-05-22 12:50:43 -04003648out_free:
3649 kfree(data);
3650 return NULL;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003651}
3652
3653static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3654{
Bryan Schumaker7c513052011-03-24 17:12:24 +00003655 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
Bryan Schumakere73b83f2011-03-24 17:12:23 +00003656 &data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003657 if (status == 0) {
3658 update_changeattr(dir, &data->res.dir_cinfo);
David Quigley1775fd32013-05-22 12:50:42 -04003659 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003660 }
3661 return status;
3662}
3663
3664static void nfs4_free_createdata(struct nfs4_createdata *data)
3665{
David Quigley14c43f72013-05-22 12:50:43 -04003666 nfs4_label_free(data->label);
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003667 kfree(data);
3668}
3669
Chuck Lever4f390c12006-08-22 20:06:22 -04003670static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003671 struct page *page, unsigned int len, struct iattr *sattr,
3672 struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003673{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003674 struct nfs4_createdata *data;
3675 int status = -ENAMETOOLONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676
Chuck Lever94a6d752006-08-22 20:06:23 -04003677 if (len > NFS4_MAXPATHLEN)
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003678 goto out;
Chuck Lever4f390c12006-08-22 20:06:22 -04003679
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003680 status = -ENOMEM;
3681 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3682 if (data == NULL)
3683 goto out;
3684
3685 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3686 data->arg.u.symlink.pages = &page;
3687 data->arg.u.symlink.len = len;
David Quigley1775fd32013-05-22 12:50:42 -04003688 data->arg.label = label;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003690 status = nfs4_do_create(dir, dentry, data);
3691
3692 nfs4_free_createdata(data);
3693out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003694 return status;
3695}
3696
Chuck Lever4f390c12006-08-22 20:06:22 -04003697static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
Chuck Lever94a6d752006-08-22 20:06:23 -04003698 struct page *page, unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699{
3700 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003701 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702 int err;
David Quigleyaa9c2662013-05-22 12:50:44 -04003703
3704 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3705
Linus Torvalds1da177e2005-04-16 15:20:36 -07003706 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003707 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3708 trace_nfs4_symlink(dir, &dentry->d_name, err);
3709 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 &exception);
3711 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003712
3713 nfs4_label_release_security(label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714 return err;
3715}
3716
3717static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
David Quigley1775fd32013-05-22 12:50:42 -04003718 struct iattr *sattr, struct nfs4_label *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003720 struct nfs4_createdata *data;
3721 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3724 if (data == NULL)
3725 goto out;
3726
David Quigley1775fd32013-05-22 12:50:42 -04003727 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003728 status = nfs4_do_create(dir, dentry, data);
3729
3730 nfs4_free_createdata(data);
3731out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003732 return status;
3733}
3734
3735static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3736 struct iattr *sattr)
3737{
3738 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003739 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003740 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003741
David Quigleyaa9c2662013-05-22 12:50:44 -04003742 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3743
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003744 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003745 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003746 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3747 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003749 &exception);
3750 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003751 nfs4_label_release_security(label);
3752
Linus Torvalds1da177e2005-04-16 15:20:36 -07003753 return err;
3754}
3755
3756static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003757 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758{
3759 struct inode *dir = dentry->d_inode;
3760 struct nfs4_readdir_arg args = {
3761 .fh = NFS_FH(dir),
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003762 .pages = pages,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003763 .pgbase = 0,
3764 .count = count,
Trond Myklebust96d25e52009-11-11 16:15:42 +09003765 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
Bryan Schumaker82f2e542010-10-21 16:33:18 -04003766 .plus = plus,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767 };
3768 struct nfs4_readdir_res res;
3769 struct rpc_message msg = {
3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3771 .rpc_argp = &args,
3772 .rpc_resp = &res,
3773 .rpc_cred = cred,
3774 };
3775 int status;
3776
Al Viro6de14722013-09-16 10:53:17 -04003777 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3778 dentry,
Trond Myklebusteadf4592005-06-22 17:16:39 +00003779 (unsigned long long)cookie);
Trond Myklebustc3f52af2012-09-03 14:56:02 -04003780 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781 res.pgbase = args.pgbase;
Bryan Schumaker7c513052011-03-24 17:12:24 +00003782 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
Trond Myklebustac396122010-11-15 20:26:22 -05003783 if (status >= 0) {
Trond Myklebustc3f52af2012-09-03 14:56:02 -04003784 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
Trond Myklebustac396122010-11-15 20:26:22 -05003785 status += args.pgbase;
3786 }
Trond Myklebustc4812992007-09-28 17:11:45 -04003787
3788 nfs_invalidate_atime(dir);
3789
Harvey Harrison3110ff82008-05-02 13:42:44 -07003790 dprintk("%s: returns %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791 return status;
3792}
3793
3794static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -04003795 u64 cookie, struct page **pages, unsigned int count, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003796{
3797 struct nfs4_exception exception = { };
3798 int err;
3799 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04003800 err = _nfs4_proc_readdir(dentry, cred, cookie,
3801 pages, count, plus);
3802 trace_nfs4_readdir(dentry->d_inode, err);
3803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003804 &exception);
3805 } while (exception.retry);
3806 return err;
3807}
3808
3809static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
David Quigleyaa9c2662013-05-22 12:50:44 -04003810 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003811{
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003812 struct nfs4_createdata *data;
3813 int mode = sattr->ia_mode;
3814 int status = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003816 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3817 if (data == NULL)
3818 goto out;
3819
Linus Torvalds1da177e2005-04-16 15:20:36 -07003820 if (S_ISFIFO(mode))
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003821 data->arg.ftype = NF4FIFO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822 else if (S_ISBLK(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003823 data->arg.ftype = NF4BLK;
3824 data->arg.u.device.specdata1 = MAJOR(rdev);
3825 data->arg.u.device.specdata2 = MINOR(rdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003826 }
3827 else if (S_ISCHR(mode)) {
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003828 data->arg.ftype = NF4CHR;
3829 data->arg.u.device.specdata1 = MAJOR(rdev);
3830 data->arg.u.device.specdata2 = MINOR(rdev);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04003831 } else if (!S_ISSOCK(mode)) {
3832 status = -EINVAL;
3833 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003834 }
David Quigley1775fd32013-05-22 12:50:42 -04003835
David Quigleyaa9c2662013-05-22 12:50:44 -04003836 data->arg.label = label;
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003837 status = nfs4_do_create(dir, dentry, data);
Trond Myklebust4ea8fed2012-10-15 15:47:41 -04003838out_free:
Trond Myklebust57dc9a52008-06-20 15:35:32 -04003839 nfs4_free_createdata(data);
3840out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003841 return status;
3842}
3843
3844static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3845 struct iattr *sattr, dev_t rdev)
3846{
3847 struct nfs4_exception exception = { };
David Quigleyaa9c2662013-05-22 12:50:44 -04003848 struct nfs4_label l, *label = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003849 int err;
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003850
David Quigleyaa9c2662013-05-22 12:50:44 -04003851 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3852
Aneesh Kumar K.Va8a5da92010-12-09 11:35:14 +00003853 sattr->ia_mode &= ~current_umask();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04003855 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3856 trace_nfs4_mknod(dir, &dentry->d_name, err);
3857 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858 &exception);
3859 } while (exception.retry);
David Quigleyaa9c2662013-05-22 12:50:44 -04003860
3861 nfs4_label_release_security(label);
3862
Linus Torvalds1da177e2005-04-16 15:20:36 -07003863 return err;
3864}
3865
3866static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3867 struct nfs_fsstat *fsstat)
3868{
3869 struct nfs4_statfs_arg args = {
3870 .fh = fhandle,
3871 .bitmask = server->attr_bitmask,
3872 };
Benny Halevy24ad1482009-04-01 09:21:56 -04003873 struct nfs4_statfs_res res = {
3874 .fsstat = fsstat,
3875 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003876 struct rpc_message msg = {
3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3878 .rpc_argp = &args,
Benny Halevy24ad1482009-04-01 09:21:56 -04003879 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 };
3881
Trond Myklebust0e574af2005-10-27 22:12:38 -04003882 nfs_fattr_init(fsstat->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003883 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003884}
3885
3886static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3887{
3888 struct nfs4_exception exception = { };
3889 int err;
3890 do {
3891 err = nfs4_handle_exception(server,
3892 _nfs4_proc_statfs(server, fhandle, fsstat),
3893 &exception);
3894 } while (exception.retry);
3895 return err;
3896}
3897
3898static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3899 struct nfs_fsinfo *fsinfo)
3900{
3901 struct nfs4_fsinfo_arg args = {
3902 .fh = fhandle,
3903 .bitmask = server->attr_bitmask,
3904 };
Benny Halevy3dda5e42009-04-01 09:21:57 -04003905 struct nfs4_fsinfo_res res = {
3906 .fsinfo = fsinfo,
3907 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 struct rpc_message msg = {
3909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3910 .rpc_argp = &args,
Benny Halevy3dda5e42009-04-01 09:21:57 -04003911 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912 };
3913
Bryan Schumaker7c513052011-03-24 17:12:24 +00003914 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003915}
3916
3917static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3918{
3919 struct nfs4_exception exception = { };
Chuck Lever83ca7f52013-03-16 15:55:53 -04003920 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003921 int err;
3922
3923 do {
Chuck Lever83ca7f52013-03-16 15:55:53 -04003924 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
Trond Myklebustb5f875a2013-08-13 13:01:39 -04003925 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
Chuck Lever83ca7f52013-03-16 15:55:53 -04003926 if (err == 0) {
3927 struct nfs_client *clp = server->nfs_client;
3928
3929 spin_lock(&clp->cl_lock);
3930 clp->cl_lease_time = fsinfo->lease_time * HZ;
3931 clp->cl_last_renewal = now;
3932 spin_unlock(&clp->cl_lock);
3933 break;
3934 }
3935 err = nfs4_handle_exception(server, err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003936 } while (exception.retry);
3937 return err;
3938}
3939
3940static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3941{
Bryan Schumakere38eb652012-06-20 15:53:40 -04003942 int error;
3943
Trond Myklebust0e574af2005-10-27 22:12:38 -04003944 nfs_fattr_init(fsinfo->fattr);
Bryan Schumakere38eb652012-06-20 15:53:40 -04003945 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
Peng Taodc182542012-08-24 00:27:49 +08003946 if (error == 0) {
3947 /* block layout checks this! */
3948 server->pnfs_blksize = fsinfo->blksize;
Bryan Schumakere38eb652012-06-20 15:53:40 -04003949 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
Peng Taodc182542012-08-24 00:27:49 +08003950 }
Bryan Schumakere38eb652012-06-20 15:53:40 -04003951
3952 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953}
3954
3955static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3956 struct nfs_pathconf *pathconf)
3957{
3958 struct nfs4_pathconf_arg args = {
3959 .fh = fhandle,
3960 .bitmask = server->attr_bitmask,
3961 };
Benny Halevyd45b2982009-04-01 09:21:58 -04003962 struct nfs4_pathconf_res res = {
3963 .pathconf = pathconf,
3964 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3967 .rpc_argp = &args,
Benny Halevyd45b2982009-04-01 09:21:58 -04003968 .rpc_resp = &res,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003969 };
3970
3971 /* None of the pathconf attributes are mandatory to implement */
3972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3973 memset(pathconf, 0, sizeof(*pathconf));
3974 return 0;
3975 }
3976
Trond Myklebust0e574af2005-10-27 22:12:38 -04003977 nfs_fattr_init(pathconf->fattr);
Bryan Schumaker7c513052011-03-24 17:12:24 +00003978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003979}
3980
3981static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3982 struct nfs_pathconf *pathconf)
3983{
3984 struct nfs4_exception exception = { };
3985 int err;
3986
3987 do {
3988 err = nfs4_handle_exception(server,
3989 _nfs4_proc_pathconf(server, fhandle, pathconf),
3990 &exception);
3991 } while (exception.retry);
3992 return err;
3993}
3994
Trond Myklebust5521abf2013-03-16 20:54:34 -04003995int nfs4_set_rw_stateid(nfs4_stateid *stateid,
Trond Myklebust9b206142013-03-17 15:52:00 -04003996 const struct nfs_open_context *ctx,
3997 const struct nfs_lock_context *l_ctx,
3998 fmode_t fmode)
3999{
4000 const struct nfs_lockowner *lockowner = NULL;
4001
4002 if (l_ctx != NULL)
4003 lockowner = &l_ctx->lockowner;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004004 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
Trond Myklebust9b206142013-03-17 15:52:00 -04004005}
4006EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4007
Trond Myklebust5521abf2013-03-16 20:54:34 -04004008static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4009 const struct nfs_open_context *ctx,
4010 const struct nfs_lock_context *l_ctx,
4011 fmode_t fmode)
4012{
4013 nfs4_stateid current_stateid;
4014
Trond Myklebuste1253be2014-03-05 08:44:23 -05004015 /* If the current stateid represents a lost lock, then exit */
4016 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4017 return true;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004018 return nfs4_stateid_match(stateid, &current_stateid);
4019}
4020
4021static bool nfs4_error_stateid_expired(int err)
4022{
4023 switch (err) {
4024 case -NFS4ERR_DELEG_REVOKED:
4025 case -NFS4ERR_ADMIN_REVOKED:
4026 case -NFS4ERR_BAD_STATEID:
4027 case -NFS4ERR_STALE_STATEID:
4028 case -NFS4ERR_OLD_STATEID:
4029 case -NFS4ERR_OPENMODE:
4030 case -NFS4ERR_EXPIRED:
4031 return true;
4032 }
4033 return false;
4034}
4035
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004036void __nfs4_read_done_cb(struct nfs_pgio_data *data)
Benny Halevyd20581a2011-05-22 19:52:03 +03004037{
Fred Isamancd841602012-04-20 14:47:44 -04004038 nfs_invalidate_atime(data->header->inode);
Benny Halevyd20581a2011-05-22 19:52:03 +03004039}
4040
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004041static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042{
Fred Isamancd841602012-04-20 14:47:44 -04004043 struct nfs_server *server = NFS_SERVER(data->header->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004044
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004045 trace_nfs4_read(data, task->tk_status);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004046 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004047 rpc_restart_call_prepare(task);
Trond Myklebustec06c092006-03-20 13:44:27 -05004048 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004049 }
Trond Myklebust8850df92007-09-28 17:20:07 -04004050
Benny Halevyd20581a2011-05-22 19:52:03 +03004051 __nfs4_read_done_cb(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004052 if (task->tk_status > 0)
Trond Myklebustec06c092006-03-20 13:44:27 -05004053 renew_lease(server, data->timestamp);
4054 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004055}
4056
Trond Myklebust5521abf2013-03-16 20:54:34 -04004057static bool nfs4_read_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004058 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004059{
4060
4061 if (!nfs4_error_stateid_expired(task->tk_status) ||
4062 nfs4_stateid_is_current(&args->stateid,
4063 args->context,
4064 args->lock_context,
4065 FMODE_READ))
4066 return false;
4067 rpc_restart_call_prepare(task);
4068 return true;
4069}
4070
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004071static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_data *data)
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004072{
4073
4074 dprintk("--> %s\n", __func__);
4075
4076 if (!nfs4_sequence_done(task, &data->res.seq_res))
4077 return -EAGAIN;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004078 if (nfs4_read_stateid_changed(task, &data->args))
4079 return -EAGAIN;
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004080 return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
Benny Halevyd20581a2011-05-22 19:52:03 +03004081 nfs4_read_done_cb(task, data);
Andy Adamsoncbdabc7f2011-03-01 01:34:20 +00004082}
4083
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004084static void nfs4_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004085{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004086 data->timestamp = jiffies;
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004087 data->pgio_done_cb = nfs4_read_done_cb;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
Chuck Levera9c92d62013-08-09 12:48:18 -04004089 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004090}
4091
Anna Schumakera4cdda52014-05-06 09:12:31 -04004092static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data)
Bryan Schumakerea7c3302012-03-19 14:54:40 -04004093{
Trond Myklebust9b206142013-03-17 15:52:00 -04004094 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
Trond Myklebustd9afbd12012-10-22 20:28:44 -04004095 &data->args.seq_args,
4096 &data->res.seq_res,
Trond Myklebust9b206142013-03-17 15:52:00 -04004097 task))
NeilBrownef1820f2013-09-04 17:04:49 +10004098 return 0;
4099 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
Anna Schumakera4cdda52014-05-06 09:12:31 -04004100 data->args.lock_context, data->header->rw_ops->rw_mode) == -EIO)
NeilBrownef1820f2013-09-04 17:04:49 +10004101 return -EIO;
4102 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4103 return -EIO;
4104 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004105}
4106
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004107static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_pgio_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108{
Fred Isamancd841602012-04-20 14:47:44 -04004109 struct inode *inode = data->header->inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004111 trace_nfs4_write(data, task->tk_status);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004112 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004113 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004114 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004115 }
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004116 if (task->tk_status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117 renew_lease(NFS_SERVER(inode), data->timestamp);
Trond Myklebust5a37f852012-04-28 14:55:16 -04004118 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004119 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004120 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004121}
4122
Trond Myklebust5521abf2013-03-16 20:54:34 -04004123static bool nfs4_write_stateid_changed(struct rpc_task *task,
Anna Schumaker3c6b8992014-05-06 09:12:24 -04004124 struct nfs_pgio_args *args)
Trond Myklebust5521abf2013-03-16 20:54:34 -04004125{
4126
4127 if (!nfs4_error_stateid_expired(task->tk_status) ||
4128 nfs4_stateid_is_current(&args->stateid,
4129 args->context,
4130 args->lock_context,
4131 FMODE_WRITE))
4132 return false;
4133 rpc_restart_call_prepare(task);
4134 return true;
4135}
4136
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004137static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_data *data)
Fred Isamanb029bc92011-03-03 15:13:42 +00004138{
4139 if (!nfs4_sequence_done(task, &data->res.seq_res))
4140 return -EAGAIN;
Trond Myklebust5521abf2013-03-16 20:54:34 -04004141 if (nfs4_write_stateid_changed(task, &data->args))
4142 return -EAGAIN;
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004143 return data->pgio_done_cb ? data->pgio_done_cb(task, data) :
Benny Halevyd20581a2011-05-22 19:52:03 +03004144 nfs4_write_done_cb(task, data);
Fred Isamanb029bc92011-03-03 15:13:42 +00004145}
4146
Trond Myklebust5a37f852012-04-28 14:55:16 -04004147static
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004148bool nfs4_write_need_cache_consistency_data(const struct nfs_pgio_data *data)
Fred Isamana69aef12011-03-03 15:13:47 +00004149{
Trond Myklebust5a37f852012-04-28 14:55:16 -04004150 const struct nfs_pgio_header *hdr = data->header;
4151
4152 /* Don't request attributes for pNFS or O_DIRECT writes */
4153 if (data->ds_clp != NULL || hdr->dreq != NULL)
4154 return false;
4155 /* Otherwise, request attributes if and only if we don't hold
4156 * a delegation
4157 */
Bryan Schumaker011e2a72012-06-20 15:53:43 -04004158 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
Fred Isamana69aef12011-03-03 15:13:47 +00004159}
Fred Isamana69aef12011-03-03 15:13:47 +00004160
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004161static void nfs4_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004162{
Fred Isamancd841602012-04-20 14:47:44 -04004163 struct nfs_server *server = NFS_SERVER(data->header->inode);
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004164
Trond Myklebust5a37f852012-04-28 14:55:16 -04004165 if (!nfs4_write_need_cache_consistency_data(data)) {
Fred Isaman7ffd1062011-03-03 15:13:46 +00004166 data->args.bitmask = NULL;
4167 data->res.fattr = NULL;
4168 } else
4169 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebust5a37f852012-04-28 14:55:16 -04004170
Anna Schumaker9c7e1b32014-05-06 09:12:26 -04004171 if (!data->pgio_done_cb)
4172 data->pgio_done_cb = nfs4_write_done_cb;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004173 data->res.server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004174 data->timestamp = jiffies;
4175
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004176 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
Chuck Levera9c92d62013-08-09 12:48:18 -04004177 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004178}
4179
Fred Isaman0b7c0152012-04-20 14:47:39 -04004180static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4181{
Trond Myklebustd9afbd12012-10-22 20:28:44 -04004182 nfs4_setup_sequence(NFS_SERVER(data->inode),
4183 &data->args.seq_args,
4184 &data->res.seq_res,
4185 task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004186}
4187
Fred Isaman0b7c0152012-04-20 14:47:39 -04004188static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004189{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190 struct inode *inode = data->inode;
Trond Myklebust14516c32010-07-31 14:29:06 -04004191
Trond Myklebustcc668ab2013-08-14 15:31:28 -04004192 trace_nfs4_commit(data, task->tk_status);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004193 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07004194 rpc_restart_call_prepare(task);
Trond Myklebust788e7a82006-03-20 13:44:27 -05004195 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004196 }
Trond Myklebust788e7a82006-03-20 13:44:27 -05004197 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004198}
4199
Fred Isaman0b7c0152012-04-20 14:47:39 -04004200static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
Fred Isaman5f452432011-03-23 13:27:46 +00004201{
4202 if (!nfs4_sequence_done(task, &data->res.seq_res))
4203 return -EAGAIN;
Fred Isaman0b7c0152012-04-20 14:47:39 -04004204 return data->commit_done_cb(task, data);
Fred Isaman5f452432011-03-23 13:27:46 +00004205}
4206
Fred Isaman0b7c0152012-04-20 14:47:39 -04004207static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004208{
Trond Myklebust788e7a82006-03-20 13:44:27 -05004209 struct nfs_server *server = NFS_SERVER(data->inode);
Fred Isaman988b6dc2011-03-23 13:27:52 +00004210
Fred Isaman0b7c0152012-04-20 14:47:39 -04004211 if (data->commit_done_cb == NULL)
4212 data->commit_done_cb = nfs4_commit_done_cb;
Trond Myklebust4f9838c2005-10-27 22:12:44 -04004213 data->res.server = server;
Trond Myklebustbdc7f022007-07-14 15:40:00 -04004214 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
Chuck Levera9c92d62013-08-09 12:48:18 -04004215 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004216}
4217
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004218struct nfs4_renewdata {
4219 struct nfs_client *client;
4220 unsigned long timestamp;
4221};
4222
Linus Torvalds1da177e2005-04-16 15:20:36 -07004223/*
4224 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4225 * standalone procedure for queueing an asynchronous RENEW.
4226 */
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004227static void nfs4_renew_release(void *calldata)
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004228{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004229 struct nfs4_renewdata *data = calldata;
4230 struct nfs_client *clp = data->client;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004231
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004232 if (atomic_read(&clp->cl_count) > 1)
4233 nfs4_schedule_state_renewal(clp);
4234 nfs_put_client(clp);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004235 kfree(data);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004236}
4237
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004238static void nfs4_renew_done(struct rpc_task *task, void *calldata)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004239{
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004240 struct nfs4_renewdata *data = calldata;
4241 struct nfs_client *clp = data->client;
4242 unsigned long timestamp = data->timestamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004244 trace_nfs4_renew_async(clp, task->tk_status);
Chuck Leverf8aba1e2013-10-17 14:13:53 -04004245 switch (task->tk_status) {
4246 case 0:
4247 break;
4248 case -NFS4ERR_LEASE_MOVED:
4249 nfs4_schedule_lease_moved_recovery(clp);
4250 break;
4251 default:
Trond Myklebust95baa252009-05-26 14:51:00 -04004252 /* Unless we're shutting down, schedule state recovery! */
Trond Myklebust042b60b2011-08-24 15:07:37 -04004253 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4254 return;
4255 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004256 nfs4_schedule_lease_recovery(clp);
Trond Myklebust042b60b2011-08-24 15:07:37 -04004257 return;
4258 }
4259 nfs4_schedule_path_down_recovery(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004260 }
Trond Myklebust452e9352010-07-31 14:29:06 -04004261 do_renew_lease(clp, timestamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004262}
4263
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004264static const struct rpc_call_ops nfs4_renew_ops = {
4265 .rpc_call_done = nfs4_renew_done,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08004266 .rpc_release = nfs4_renew_release,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01004267};
4268
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004269static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270{
4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4273 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004274 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004275 };
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004276 struct nfs4_renewdata *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004277
Trond Myklebust2f60ea62011-08-24 15:07:37 -04004278 if (renew_flags == 0)
4279 return 0;
Alexandros Batsakis0851de062010-02-05 03:45:06 -08004280 if (!atomic_inc_not_zero(&clp->cl_count))
4281 return -EIO;
Trond Myklebustb569ad32011-08-24 15:07:35 -04004282 data = kmalloc(sizeof(*data), GFP_NOFS);
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004283 if (data == NULL)
4284 return -ENOMEM;
4285 data->client = clp;
4286 data->timestamp = jiffies;
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004287 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
Chuck Lever9bc4e3c2010-05-07 13:34:17 -04004288 &nfs4_renew_ops, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004289}
4290
Trond Myklebust8534d4e2011-08-24 15:07:37 -04004291static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004292{
4293 struct rpc_message msg = {
4294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4295 .rpc_argp = clp,
Trond Myklebustb4454fe2006-01-03 09:55:25 +01004296 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004297 };
4298 unsigned long now = jiffies;
4299 int status;
4300
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04004301 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004302 if (status < 0)
4303 return status;
Trond Myklebust452e9352010-07-31 14:29:06 -04004304 do_renew_lease(clp, now);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004305 return 0;
4306}
4307
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004308static inline int nfs4_server_supports_acls(struct nfs_server *server)
4309{
Malahal Naineni7dd7d952014-01-23 08:54:55 -06004310 return server->caps & NFS_CAP_ACLS;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004311}
4312
Trond Myklebust21f498c2012-08-24 10:59:25 -04004313/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4314 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004315 * the stack.
4316 */
Trond Myklebust21f498c2012-08-24 10:59:25 -04004317#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004318
Neil Hormane9e3d722011-03-04 19:26:03 -05004319static int buf_to_pages_noslab(const void *buf, size_t buflen,
4320 struct page **pages, unsigned int *pgbase)
4321{
4322 struct page *newpage, **spages;
4323 int rc = 0;
4324 size_t len;
4325 spages = pages;
4326
4327 do {
Trond Myklebust21f498c2012-08-24 10:59:25 -04004328 len = min_t(size_t, PAGE_SIZE, buflen);
Neil Hormane9e3d722011-03-04 19:26:03 -05004329 newpage = alloc_page(GFP_KERNEL);
4330
4331 if (newpage == NULL)
4332 goto unwind;
4333 memcpy(page_address(newpage), buf, len);
4334 buf += len;
4335 buflen -= len;
4336 *pages++ = newpage;
4337 rc++;
4338 } while (buflen != 0);
4339
4340 return rc;
4341
4342unwind:
4343 for(; rc > 0; rc--)
4344 __free_page(spages[rc-1]);
4345 return -ENOMEM;
4346}
4347
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004348struct nfs4_cached_acl {
4349 int cached;
4350 size_t len;
Andrew Morton3e9d4152005-06-22 17:16:28 +00004351 char data[0];
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004352};
4353
4354static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004355{
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004356 struct nfs_inode *nfsi = NFS_I(inode);
4357
4358 spin_lock(&inode->i_lock);
4359 kfree(nfsi->nfs4_acl);
4360 nfsi->nfs4_acl = acl;
4361 spin_unlock(&inode->i_lock);
4362}
4363
4364static void nfs4_zap_acl_attr(struct inode *inode)
4365{
4366 nfs4_set_cached_acl(inode, NULL);
4367}
4368
4369static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4370{
4371 struct nfs_inode *nfsi = NFS_I(inode);
4372 struct nfs4_cached_acl *acl;
4373 int ret = -ENOENT;
4374
4375 spin_lock(&inode->i_lock);
4376 acl = nfsi->nfs4_acl;
4377 if (acl == NULL)
4378 goto out;
4379 if (buf == NULL) /* user is just asking for length */
4380 goto out_len;
4381 if (acl->cached == 0)
4382 goto out;
4383 ret = -ERANGE; /* see getxattr(2) man page */
4384 if (acl->len > buflen)
4385 goto out;
4386 memcpy(buf, acl->data, acl->len);
4387out_len:
4388 ret = acl->len;
4389out:
4390 spin_unlock(&inode->i_lock);
4391 return ret;
4392}
4393
Sachin Prabhu5794d212012-04-17 14:36:40 +01004394static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004395{
4396 struct nfs4_cached_acl *acl;
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004397 size_t buflen = sizeof(*acl) + acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004398
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004399 if (buflen <= PAGE_SIZE) {
Trond Myklebustb291f1b2012-08-14 18:30:41 -04004400 acl = kmalloc(buflen, GFP_KERNEL);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004401 if (acl == NULL)
4402 goto out;
4403 acl->cached = 1;
Sachin Prabhu5794d212012-04-17 14:36:40 +01004404 _copy_from_pages(acl->data, pages, pgbase, acl_len);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004405 } else {
4406 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4407 if (acl == NULL)
4408 goto out;
4409 acl->cached = 0;
4410 }
4411 acl->len = acl_len;
4412out:
4413 nfs4_set_cached_acl(inode, acl);
4414}
4415
Andy Adamsonbf118a32011-12-07 11:55:27 -05004416/*
4417 * The getxattr API returns the required buffer length when called with a
4418 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4419 * the required buf. On a NULL buf, we send a page of data to the server
4420 * guessing that the ACL request can be serviced by a page. If so, we cache
4421 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4422 * the cache. If not so, we throw away the page, and cache the required
4423 * length. The next getxattr call will then produce another round trip to
4424 * the server, this time with the input buf of the required size.
4425 */
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004426static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004427{
Andy Adamsonbf118a32011-12-07 11:55:27 -05004428 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004429 struct nfs_getaclargs args = {
4430 .fh = NFS_FH(inode),
4431 .acl_pages = pages,
4432 .acl_len = buflen,
4433 };
Benny Halevy663c79b2009-04-01 09:21:59 -04004434 struct nfs_getaclres res = {
4435 .acl_len = buflen,
4436 };
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004437 struct rpc_message msg = {
4438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4439 .rpc_argp = &args,
Benny Halevy663c79b2009-04-01 09:21:59 -04004440 .rpc_resp = &res,
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004441 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004442 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4443 int ret = -ENOMEM, i;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004444
Andy Adamsonbf118a32011-12-07 11:55:27 -05004445 /* As long as we're doing a round trip to the server anyway,
4446 * let's be prepared for a page of acl data. */
4447 if (npages == 0)
4448 npages = 1;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004449 if (npages > ARRAY_SIZE(pages))
4450 return -ERANGE;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004451
Andy Adamsonbf118a32011-12-07 11:55:27 -05004452 for (i = 0; i < npages; i++) {
4453 pages[i] = alloc_page(GFP_KERNEL);
4454 if (!pages[i])
4455 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004456 }
Sachin Prabhu5a006892012-04-17 14:35:39 +01004457
4458 /* for decoding across pages */
4459 res.acl_scratch = alloc_page(GFP_KERNEL);
4460 if (!res.acl_scratch)
4461 goto out_free;
4462
Andy Adamsonbf118a32011-12-07 11:55:27 -05004463 args.acl_len = npages * PAGE_SIZE;
4464 args.acl_pgbase = 0;
Sachin Prabhu5a006892012-04-17 14:35:39 +01004465
Peng Taode040be2012-01-10 22:42:47 +08004466 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
Andy Adamsonbf118a32011-12-07 11:55:27 -05004467 __func__, buf, buflen, npages, args.acl_len);
4468 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4469 &msg, &args.seq_args, &res.seq_res, 0);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004470 if (ret)
4471 goto out_free;
Andy Adamsonbf118a32011-12-07 11:55:27 -05004472
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004473 /* Handle the case where the passed-in buffer is too short */
4474 if (res.acl_flags & NFS4_ACL_TRUNC) {
4475 /* Did the user only issue a request for the acl length? */
4476 if (buf == NULL)
4477 goto out_ok;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004478 ret = -ERANGE;
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004479 goto out_free;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004480 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004481 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004482 if (buf) {
4483 if (res.acl_len > buflen) {
4484 ret = -ERANGE;
4485 goto out_free;
4486 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004487 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
Sven Wegener7d3e91a2012-12-08 15:30:18 +01004488 }
Trond Myklebust1f1ea6c2012-08-26 11:44:43 -07004489out_ok:
4490 ret = res.acl_len;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004491out_free:
Andy Adamsonbf118a32011-12-07 11:55:27 -05004492 for (i = 0; i < npages; i++)
4493 if (pages[i])
4494 __free_page(pages[i]);
Trond Myklebust331818f2012-02-03 18:30:53 -05004495 if (res.acl_scratch)
4496 __free_page(res.acl_scratch);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004497 return ret;
4498}
4499
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004500static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4501{
4502 struct nfs4_exception exception = { };
4503 ssize_t ret;
4504 do {
4505 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
Trond Myklebustc1578b72013-08-12 16:58:42 -04004506 trace_nfs4_get_acl(inode, ret);
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004507 if (ret >= 0)
4508 break;
4509 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4510 } while (exception.retry);
4511 return ret;
4512}
4513
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004514static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4515{
4516 struct nfs_server *server = NFS_SERVER(inode);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004517 int ret;
4518
4519 if (!nfs4_server_supports_acls(server))
4520 return -EOPNOTSUPP;
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004521 ret = nfs_revalidate_inode(server, inode);
4522 if (ret < 0)
4523 return ret;
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004524 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4525 nfs_zap_acl_cache(inode);
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004526 ret = nfs4_read_cached_acl(inode, buf, buflen);
4527 if (ret != -ENOENT)
Andy Adamsonbf118a32011-12-07 11:55:27 -05004528 /* -ENOENT is returned if there is no ACL or if there is an ACL
4529 * but no cached acl data, just the acl length */
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00004530 return ret;
4531 return nfs4_get_acl_uncached(inode, buf, buflen);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00004532}
4533
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004534static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004535{
4536 struct nfs_server *server = NFS_SERVER(inode);
4537 struct page *pages[NFS4ACL_MAXPAGES];
4538 struct nfs_setaclargs arg = {
4539 .fh = NFS_FH(inode),
4540 .acl_pages = pages,
4541 .acl_len = buflen,
4542 };
Benny Halevy73c403a2009-04-01 09:22:01 -04004543 struct nfs_setaclres res;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4546 .rpc_argp = &arg,
Benny Halevy73c403a2009-04-01 09:22:01 -04004547 .rpc_resp = &res,
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004548 };
Trond Myklebust21f498c2012-08-24 10:59:25 -04004549 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
Neil Hormane9e3d722011-03-04 19:26:03 -05004550 int ret, i;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004551
4552 if (!nfs4_server_supports_acls(server))
4553 return -EOPNOTSUPP;
Trond Myklebust21f498c2012-08-24 10:59:25 -04004554 if (npages > ARRAY_SIZE(pages))
4555 return -ERANGE;
Neil Hormane9e3d722011-03-04 19:26:03 -05004556 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4557 if (i < 0)
4558 return i;
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04004559 nfs4_inode_return_delegation(inode);
Bryan Schumaker7c513052011-03-24 17:12:24 +00004560 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Neil Hormane9e3d722011-03-04 19:26:03 -05004561
4562 /*
4563 * Free each page after tx, so the only ref left is
4564 * held by the network stack
4565 */
4566 for (; i > 0; i--)
4567 put_page(pages[i-1]);
4568
Aneesh Kumar K.V08a22b32010-12-01 10:42:16 +00004569 /*
4570 * Acl update can result in inode attribute update.
4571 * so mark the attribute cache invalid.
4572 */
4573 spin_lock(&inode->i_lock);
4574 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4575 spin_unlock(&inode->i_lock);
Trond Myklebustf41f7412008-06-11 17:39:04 -04004576 nfs_access_zap_cache(inode);
4577 nfs_zap_acl_cache(inode);
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00004578 return ret;
4579}
4580
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004581static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4582{
4583 struct nfs4_exception exception = { };
4584 int err;
4585 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004586 err = __nfs4_proc_set_acl(inode, buf, buflen);
4587 trace_nfs4_set_acl(inode, err);
4588 err = nfs4_handle_exception(NFS_SERVER(inode), err,
Trond Myklebust16b4289c2006-08-24 12:27:15 -04004589 &exception);
4590 } while (exception.retry);
4591 return err;
4592}
4593
David Quigleyaa9c2662013-05-22 12:50:44 -04004594#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4595static int _nfs4_get_security_label(struct inode *inode, void *buf,
4596 size_t buflen)
4597{
4598 struct nfs_server *server = NFS_SERVER(inode);
4599 struct nfs_fattr fattr;
4600 struct nfs4_label label = {0, 0, buflen, buf};
4601
4602 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004603 struct nfs4_getattr_arg arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004604 .fh = NFS_FH(inode),
4605 .bitmask = bitmask,
4606 };
4607 struct nfs4_getattr_res res = {
4608 .fattr = &fattr,
4609 .label = &label,
4610 .server = server,
4611 };
4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004614 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004615 .rpc_resp = &res,
4616 };
4617 int ret;
4618
4619 nfs_fattr_init(&fattr);
4620
Trond Myklebustfcb63a92013-11-01 12:42:25 -04004621 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
David Quigleyaa9c2662013-05-22 12:50:44 -04004622 if (ret)
4623 return ret;
4624 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4625 return -ENOENT;
4626 if (buflen < label.len)
4627 return -ERANGE;
4628 return 0;
4629}
4630
4631static int nfs4_get_security_label(struct inode *inode, void *buf,
4632 size_t buflen)
4633{
4634 struct nfs4_exception exception = { };
4635 int err;
4636
4637 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4638 return -EOPNOTSUPP;
4639
4640 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004641 err = _nfs4_get_security_label(inode, buf, buflen);
4642 trace_nfs4_get_security_label(inode, err);
4643 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004644 &exception);
4645 } while (exception.retry);
4646 return err;
4647}
4648
4649static int _nfs4_do_set_security_label(struct inode *inode,
4650 struct nfs4_label *ilabel,
4651 struct nfs_fattr *fattr,
4652 struct nfs4_label *olabel)
4653{
4654
4655 struct iattr sattr = {0};
4656 struct nfs_server *server = NFS_SERVER(inode);
4657 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
Jeff Layton12207f62013-11-01 10:49:32 -04004658 struct nfs_setattrargs arg = {
David Quigleyaa9c2662013-05-22 12:50:44 -04004659 .fh = NFS_FH(inode),
4660 .iap = &sattr,
4661 .server = server,
4662 .bitmask = bitmask,
4663 .label = ilabel,
4664 };
4665 struct nfs_setattrres res = {
4666 .fattr = fattr,
4667 .label = olabel,
4668 .server = server,
4669 };
4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
Jeff Layton12207f62013-11-01 10:49:32 -04004672 .rpc_argp = &arg,
David Quigleyaa9c2662013-05-22 12:50:44 -04004673 .rpc_resp = &res,
4674 };
4675 int status;
4676
Jeff Layton12207f62013-11-01 10:49:32 -04004677 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
David Quigleyaa9c2662013-05-22 12:50:44 -04004678
Jeff Layton12207f62013-11-01 10:49:32 -04004679 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
David Quigleyaa9c2662013-05-22 12:50:44 -04004680 if (status)
4681 dprintk("%s failed: %d\n", __func__, status);
4682
4683 return status;
4684}
4685
4686static int nfs4_do_set_security_label(struct inode *inode,
4687 struct nfs4_label *ilabel,
4688 struct nfs_fattr *fattr,
4689 struct nfs4_label *olabel)
4690{
4691 struct nfs4_exception exception = { };
4692 int err;
4693
4694 do {
Trond Myklebustc1578b72013-08-12 16:58:42 -04004695 err = _nfs4_do_set_security_label(inode, ilabel,
4696 fattr, olabel);
4697 trace_nfs4_set_security_label(inode, err);
4698 err = nfs4_handle_exception(NFS_SERVER(inode), err,
David Quigleyaa9c2662013-05-22 12:50:44 -04004699 &exception);
4700 } while (exception.retry);
4701 return err;
4702}
4703
4704static int
4705nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4706{
4707 struct nfs4_label ilabel, *olabel = NULL;
4708 struct nfs_fattr fattr;
4709 struct rpc_cred *cred;
4710 struct inode *inode = dentry->d_inode;
4711 int status;
4712
4713 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4714 return -EOPNOTSUPP;
4715
4716 nfs_fattr_init(&fattr);
4717
4718 ilabel.pi = 0;
4719 ilabel.lfs = 0;
4720 ilabel.label = (char *)buf;
4721 ilabel.len = buflen;
4722
4723 cred = rpc_lookup_cred();
4724 if (IS_ERR(cred))
4725 return PTR_ERR(cred);
4726
4727 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4728 if (IS_ERR(olabel)) {
4729 status = -PTR_ERR(olabel);
4730 goto out;
4731 }
4732
4733 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4734 if (status == 0)
4735 nfs_setsecurity(inode, &fattr, olabel);
4736
4737 nfs4_label_free(olabel);
4738out:
4739 put_rpccred(cred);
4740 return status;
4741}
4742#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4743
4744
Linus Torvalds1da177e2005-04-16 15:20:36 -07004745static int
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004746nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004747{
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004748 struct nfs_client *clp = server->nfs_client;
4749
4750 if (task->tk_status >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004751 return 0;
4752 switch(task->tk_status) {
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05004753 case -NFS4ERR_DELEG_REVOKED:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004754 case -NFS4ERR_ADMIN_REVOKED:
4755 case -NFS4ERR_BAD_STATEID:
Trond Myklebust14977482012-03-27 18:31:25 -04004756 if (state == NULL)
4757 break;
4758 nfs_remove_bad_delegation(state->inode);
Trond Myklebust9e33bed2008-12-23 15:21:46 -05004759 case -NFS4ERR_OPENMODE:
4760 if (state == NULL)
4761 break;
Trond Myklebust5d422302013-03-14 16:57:48 -04004762 if (nfs4_schedule_stateid_recovery(server, state) < 0)
Chuck Lever9f51a782013-10-17 14:13:13 -04004763 goto recovery_failed;
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004764 goto wait_on_recovery;
Trond Myklebust0ced63d2011-05-26 14:26:35 -04004765 case -NFS4ERR_EXPIRED:
Trond Myklebust5d422302013-03-14 16:57:48 -04004766 if (state != NULL) {
4767 if (nfs4_schedule_stateid_recovery(server, state) < 0)
Chuck Lever9f51a782013-10-17 14:13:13 -04004768 goto recovery_failed;
Trond Myklebust5d422302013-03-14 16:57:48 -04004769 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004770 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004771 case -NFS4ERR_STALE_CLIENTID:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004772 nfs4_schedule_lease_recovery(clp);
4773 goto wait_on_recovery;
Chuck Lever519ae252013-10-17 14:13:19 -04004774 case -NFS4ERR_MOVED:
4775 if (nfs4_schedule_migration_recovery(server) < 0)
4776 goto recovery_failed;
4777 goto wait_on_recovery;
Chuck Lever8ef2f8d2013-10-17 14:13:41 -04004778 case -NFS4ERR_LEASE_MOVED:
4779 nfs4_schedule_lease_moved_recovery(clp);
4780 goto wait_on_recovery;
Andy Adamson4745e312009-04-01 09:22:42 -04004781#if defined(CONFIG_NFS_V4_1)
4782 case -NFS4ERR_BADSESSION:
4783 case -NFS4ERR_BADSLOT:
4784 case -NFS4ERR_BAD_HIGH_SLOT:
4785 case -NFS4ERR_DEADSESSION:
4786 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4787 case -NFS4ERR_SEQ_FALSE_RETRY:
4788 case -NFS4ERR_SEQ_MISORDERED:
4789 dprintk("%s ERROR %d, Reset session\n", __func__,
4790 task->tk_status);
Trond Myklebust9f594792012-05-27 13:02:53 -04004791 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
Andy Adamson4a82fd72013-11-15 16:36:16 -05004792 goto wait_on_recovery;
Andy Adamson4745e312009-04-01 09:22:42 -04004793#endif /* CONFIG_NFS_V4_1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004794 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04004795 nfs_inc_server_stats(server, NFSIOS_DELAY);
Chuck Lever006ea732006-03-20 13:44:14 -05004796 case -NFS4ERR_GRACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004797 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04004798 case -NFS4ERR_RETRY_UNCACHED_REP:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004799 case -NFS4ERR_OLD_STATEID:
Chuck Leverf1478c12013-10-17 14:13:07 -04004800 goto restart_call;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004801 }
4802 task->tk_status = nfs4_map_errors(task->tk_status);
4803 return 0;
Chuck Lever9f51a782013-10-17 14:13:13 -04004804recovery_failed:
Trond Myklebust5d422302013-03-14 16:57:48 -04004805 task->tk_status = -EIO;
4806 return 0;
Trond Myklebust0400a6b2011-03-09 16:00:53 -05004807wait_on_recovery:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004808 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004809 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4810 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
Chuck Lever519ae252013-10-17 14:13:19 -04004811 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4812 goto recovery_failed;
Chuck Leverf1478c12013-10-17 14:13:07 -04004813restart_call:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05004814 task->tk_status = 0;
4815 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816}
4817
Chuck Leverf0920752012-05-21 22:45:41 -04004818static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4819 nfs4_verifier *bootverf)
Chuck Levercd937102012-03-02 17:14:31 -05004820{
4821 __be32 verf[2];
4822
Chuck Lever2c820d92012-05-21 22:45:33 -04004823 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4824 /* An impossible timestamp guarantees this value
4825 * will never match a generated boot time. */
4826 verf[0] = 0;
Trond Myklebust17f26b12013-08-21 15:48:42 -04004827 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
Chuck Lever2c820d92012-05-21 22:45:33 -04004828 } else {
Chuck Leverf0920752012-05-21 22:45:41 -04004829 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Trond Myklebust17f26b12013-08-21 15:48:42 -04004830 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4831 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
Chuck Lever2c820d92012-05-21 22:45:33 -04004832 }
Chuck Levercd937102012-03-02 17:14:31 -05004833 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4834}
4835
Chuck Levere984a552012-09-14 17:24:21 -04004836static unsigned int
4837nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4838 char *buf, size_t len)
4839{
4840 unsigned int result;
4841
4842 rcu_read_lock();
4843 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4844 clp->cl_ipaddr,
4845 rpc_peeraddr2str(clp->cl_rpcclient,
4846 RPC_DISPLAY_ADDR),
4847 rpc_peeraddr2str(clp->cl_rpcclient,
4848 RPC_DISPLAY_PROTO));
4849 rcu_read_unlock();
4850 return result;
4851}
4852
4853static unsigned int
4854nfs4_init_uniform_client_string(const struct nfs_client *clp,
4855 char *buf, size_t len)
4856{
Trond Myklebust55b59292013-07-24 16:36:35 -04004857 const char *nodename = clp->cl_rpcclient->cl_nodename;
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04004858
4859 if (nfs4_client_id_uniquifier[0] != '\0')
Trond Myklebust55b59292013-07-24 16:36:35 -04004860 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4861 clp->rpc_ops->version,
4862 clp->cl_minorversion,
4863 nfs4_client_id_uniquifier,
4864 nodename);
Chuck Levere984a552012-09-14 17:24:21 -04004865 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4866 clp->rpc_ops->version, clp->cl_minorversion,
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04004867 nodename);
Chuck Levere984a552012-09-14 17:24:21 -04004868}
4869
Chuck Lever706cb8d2014-03-12 12:51:47 -04004870/*
4871 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4872 * services. Advertise one based on the address family of the
4873 * clientaddr.
4874 */
4875static unsigned int
4876nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4877{
4878 if (strchr(clp->cl_ipaddr, ':') != NULL)
4879 return scnprintf(buf, len, "tcp6");
4880 else
4881 return scnprintf(buf, len, "tcp");
4882}
4883
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004884/**
4885 * nfs4_proc_setclientid - Negotiate client ID
4886 * @clp: state data structure
4887 * @program: RPC program for NFSv4 callback service
4888 * @port: IP port number for NFS4 callback service
4889 * @cred: RPC credential to use for this call
4890 * @res: where to place the result
4891 *
4892 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4893 */
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004894int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4895 unsigned short port, struct rpc_cred *cred,
4896 struct nfs4_setclientid_res *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004897{
4898 nfs4_verifier sc_verifier;
4899 struct nfs4_setclientid setclientid = {
4900 .sc_verifier = &sc_verifier,
4901 .sc_prog = program,
Andy Adamsonf4eecd52011-01-06 02:04:30 +00004902 .sc_cb_ident = clp->cl_cb_ident,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004903 };
4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4906 .rpc_argp = &setclientid,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004907 .rpc_resp = res,
Trond Myklebust286d7d62006-01-03 09:55:26 +01004908 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004909 };
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004910 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004911
Chuck Leverde734832012-07-11 16:30:50 -04004912 /* nfs_client_id4 */
Chuck Leverf0920752012-05-21 22:45:41 -04004913 nfs4_init_boot_verifier(clp, &sc_verifier);
Chuck Levere984a552012-09-14 17:24:21 -04004914 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4915 setclientid.sc_name_len =
4916 nfs4_init_uniform_client_string(clp,
4917 setclientid.sc_name,
4918 sizeof(setclientid.sc_name));
4919 else
4920 setclientid.sc_name_len =
4921 nfs4_init_nonuniform_client_string(clp,
4922 setclientid.sc_name,
4923 sizeof(setclientid.sc_name));
Chuck Leverde734832012-07-11 16:30:50 -04004924 /* cb_client4 */
Chuck Lever706cb8d2014-03-12 12:51:47 -04004925 setclientid.sc_netid_len =
4926 nfs4_init_callback_netid(clp,
4927 setclientid.sc_netid,
4928 sizeof(setclientid.sc_netid));
Chuck Leverde734832012-07-11 16:30:50 -04004929 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
Chuck Leverd4d3c502007-12-10 14:57:09 -05004930 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004931 clp->cl_ipaddr, port >> 8, port & 255);
4932
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004933 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4934 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4935 setclientid.sc_name_len, setclientid.sc_name);
4936 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004937 trace_nfs4_setclientid(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004938 dprintk("NFS reply setclientid: %d\n", status);
4939 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004940}
4941
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004942/**
4943 * nfs4_proc_setclientid_confirm - Confirm client ID
4944 * @clp: state data structure
4945 * @res: result of a previous SETCLIENTID
4946 * @cred: RPC credential to use for this call
4947 *
4948 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4949 */
Trond Myklebustfd954ae2011-04-24 14:28:18 -04004950int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004951 struct nfs4_setclientid_res *arg,
4952 struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004953{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004954 struct rpc_message msg = {
4955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
Trond Myklebustbb8b27e2010-04-16 16:43:06 -04004956 .rpc_argp = arg,
Trond Myklebust286d7d62006-01-03 09:55:26 +01004957 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004958 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07004959 int status;
4960
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004961 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4962 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4963 clp->cl_clientid);
Trond Myklebust1bd714f2011-04-24 14:29:33 -04004964 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04004965 trace_nfs4_setclientid_confirm(clp, status);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04004966 dprintk("NFS reply setclientid_confirm: %d\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004967 return status;
4968}
4969
Trond Myklebustfe650402006-01-03 09:55:18 +01004970struct nfs4_delegreturndata {
4971 struct nfs4_delegreturnargs args;
Trond Myklebustfa178f22006-01-03 09:55:38 +01004972 struct nfs4_delegreturnres res;
Trond Myklebustfe650402006-01-03 09:55:18 +01004973 struct nfs_fh fh;
4974 nfs4_stateid stateid;
Trond Myklebust26e976a2006-01-03 09:55:21 +01004975 unsigned long timestamp;
Trond Myklebustfa178f22006-01-03 09:55:38 +01004976 struct nfs_fattr fattr;
Trond Myklebustfe650402006-01-03 09:55:18 +01004977 int rpc_status;
4978};
4979
Trond Myklebustfe650402006-01-03 09:55:18 +01004980static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4981{
4982 struct nfs4_delegreturndata *data = calldata;
Andy Adamson938e1012009-04-01 09:22:28 -04004983
Trond Myklebust14516c32010-07-31 14:29:06 -04004984 if (!nfs4_sequence_done(task, &data->res.seq_res))
4985 return;
Andy Adamson938e1012009-04-01 09:22:28 -04004986
Trond Myklebustca8acf82013-08-13 10:36:56 -04004987 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
Ricardo Labiaga79708862009-12-07 09:23:21 -05004988 switch (task->tk_status) {
Ricardo Labiaga79708862009-12-07 09:23:21 -05004989 case 0:
Trond Myklebustfa178f22006-01-03 09:55:38 +01004990 renew_lease(data->res.server, data->timestamp);
Ricardo Labiaga79708862009-12-07 09:23:21 -05004991 break;
Trond Myklebustc97cf602013-11-19 16:34:14 -05004992 case -NFS4ERR_ADMIN_REVOKED:
4993 case -NFS4ERR_DELEG_REVOKED:
4994 case -NFS4ERR_BAD_STATEID:
4995 case -NFS4ERR_OLD_STATEID:
4996 case -NFS4ERR_STALE_STATEID:
4997 case -NFS4ERR_EXPIRED:
4998 task->tk_status = 0;
4999 break;
Ricardo Labiaga79708862009-12-07 09:23:21 -05005000 default:
5001 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5002 -EAGAIN) {
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005003 rpc_restart_call_prepare(task);
Ricardo Labiaga79708862009-12-07 09:23:21 -05005004 return;
5005 }
5006 }
5007 data->rpc_status = task->tk_status;
Trond Myklebustfe650402006-01-03 09:55:18 +01005008}
5009
5010static void nfs4_delegreturn_release(void *calldata)
5011{
Trond Myklebustfe650402006-01-03 09:55:18 +01005012 kfree(calldata);
5013}
5014
Andy Adamson938e1012009-04-01 09:22:28 -04005015static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5016{
5017 struct nfs4_delegreturndata *d_data;
5018
5019 d_data = (struct nfs4_delegreturndata *)data;
5020
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005021 nfs4_setup_sequence(d_data->res.server,
5022 &d_data->args.seq_args,
5023 &d_data->res.seq_res,
5024 task);
Andy Adamson938e1012009-04-01 09:22:28 -04005025}
Andy Adamson938e1012009-04-01 09:22:28 -04005026
Jesper Juhlc8d149f2006-03-20 13:44:07 -05005027static const struct rpc_call_ops nfs4_delegreturn_ops = {
Andy Adamson938e1012009-04-01 09:22:28 -04005028 .rpc_call_prepare = nfs4_delegreturn_prepare,
Trond Myklebustfe650402006-01-03 09:55:18 +01005029 .rpc_call_done = nfs4_delegreturn_done,
5030 .rpc_release = nfs4_delegreturn_release,
5031};
5032
Trond Myklebuste6f81072008-01-24 18:14:34 -05005033static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Trond Myklebustfe650402006-01-03 09:55:18 +01005034{
5035 struct nfs4_delegreturndata *data;
Trond Myklebustfa178f22006-01-03 09:55:38 +01005036 struct nfs_server *server = NFS_SERVER(inode);
Trond Myklebustfe650402006-01-03 09:55:18 +01005037 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005038 struct rpc_message msg = {
5039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5040 .rpc_cred = cred,
5041 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005042 struct rpc_task_setup task_setup_data = {
5043 .rpc_client = server->client,
Trond Myklebust5138fde2007-07-14 15:40:01 -04005044 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005045 .callback_ops = &nfs4_delegreturn_ops,
5046 .flags = RPC_TASK_ASYNC,
5047 };
Trond Myklebuste6f81072008-01-24 18:14:34 -05005048 int status = 0;
Trond Myklebustfe650402006-01-03 09:55:18 +01005049
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005050 data = kzalloc(sizeof(*data), GFP_NOFS);
Trond Myklebustfe650402006-01-03 09:55:18 +01005051 if (data == NULL)
5052 return -ENOMEM;
Chuck Levera9c92d62013-08-09 12:48:18 -04005053 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Trond Myklebustfe650402006-01-03 09:55:18 +01005054 data->args.fhandle = &data->fh;
5055 data->args.stateid = &data->stateid;
Trond Myklebust9e907fe2012-04-27 13:48:17 -04005056 data->args.bitmask = server->cache_consistency_bitmask;
Trond Myklebustfe650402006-01-03 09:55:18 +01005057 nfs_copy_fh(&data->fh, NFS_FH(inode));
Trond Myklebustf597c532012-03-04 18:13:56 -05005058 nfs4_stateid_copy(&data->stateid, stateid);
Trond Myklebustfa178f22006-01-03 09:55:38 +01005059 data->res.fattr = &data->fattr;
5060 data->res.server = server;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005061 nfs_fattr_init(data->res.fattr);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005062 data->timestamp = jiffies;
Trond Myklebustfe650402006-01-03 09:55:18 +01005063 data->rpc_status = 0;
5064
Trond Myklebustc970aa82007-07-14 15:39:59 -04005065 task_setup_data.callback_data = data;
Trond Myklebust1174dd12010-12-21 10:52:24 -05005066 msg.rpc_argp = &data->args;
5067 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005068 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005069 if (IS_ERR(task))
Trond Myklebustfe650402006-01-03 09:55:18 +01005070 return PTR_ERR(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005071 if (!issync)
5072 goto out;
Trond Myklebustfe650402006-01-03 09:55:18 +01005073 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005074 if (status != 0)
5075 goto out;
5076 status = data->rpc_status;
Trond Myklebuste144cbc2012-04-28 16:05:03 -04005077 if (status == 0)
5078 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5079 else
5080 nfs_refresh_inode(inode, &data->fattr);
Trond Myklebuste6f81072008-01-24 18:14:34 -05005081out:
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005082 rpc_put_task(task);
Trond Myklebustfe650402006-01-03 09:55:18 +01005083 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005084}
5085
Trond Myklebuste6f81072008-01-24 18:14:34 -05005086int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005087{
5088 struct nfs_server *server = NFS_SERVER(inode);
5089 struct nfs4_exception exception = { };
5090 int err;
5091 do {
Trond Myklebuste6f81072008-01-24 18:14:34 -05005092 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
Trond Myklebustca8acf82013-08-13 10:36:56 -04005093 trace_nfs4_delegreturn(inode, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005094 switch (err) {
5095 case -NFS4ERR_STALE_STATEID:
5096 case -NFS4ERR_EXPIRED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005097 case 0:
5098 return 0;
5099 }
5100 err = nfs4_handle_exception(server, err, &exception);
5101 } while (exception.retry);
5102 return err;
5103}
5104
5105#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5106#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5107
5108/*
5109 * sleep, with exponential backoff, and retry the LOCK operation.
5110 */
5111static unsigned long
5112nfs4_set_lock_task_retry(unsigned long timeout)
5113{
Colin Cross416ad3c2013-05-06 23:50:06 +00005114 freezable_schedule_timeout_killable_unsafe(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005115 timeout <<= 1;
5116 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5117 return NFS4_LOCK_MAXTIMEOUT;
5118 return timeout;
5119}
5120
Linus Torvalds1da177e2005-04-16 15:20:36 -07005121static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5122{
5123 struct inode *inode = state->inode;
5124 struct nfs_server *server = NFS_SERVER(inode);
David Howells7539bba2006-08-22 20:06:09 -04005125 struct nfs_client *clp = server->nfs_client;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005126 struct nfs_lockt_args arg = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005127 .fh = NFS_FH(inode),
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005128 .fl = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005129 };
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005130 struct nfs_lockt_res res = {
5131 .denied = request,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005132 };
5133 struct rpc_message msg = {
5134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5135 .rpc_argp = &arg,
5136 .rpc_resp = &res,
5137 .rpc_cred = state->owner->so_cred,
5138 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005139 struct nfs4_lock_state *lsp;
5140 int status;
5141
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005142 arg.lock_owner.clientid = clp->cl_clientid;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005143 status = nfs4_set_lock_state(state, request);
5144 if (status != 0)
5145 goto out;
5146 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005147 arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005148 arg.lock_owner.s_dev = server->s_dev;
Bryan Schumaker7c513052011-03-24 17:12:24 +00005149 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005150 switch (status) {
5151 case 0:
5152 request->fl_type = F_UNLCK;
5153 break;
5154 case -NFS4ERR_DENIED:
5155 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005156 }
J. Bruce Fields70cc6482007-02-22 18:48:53 -05005157 request->fl_ops->fl_release_private(request);
Trond Myklebusta6f951d2013-10-01 14:24:58 -04005158 request->fl_ops = NULL;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00005159out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005160 return status;
5161}
5162
5163static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5164{
5165 struct nfs4_exception exception = { };
5166 int err;
5167
5168 do {
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005169 err = _nfs4_proc_getlk(state, cmd, request);
5170 trace_nfs4_get_lock(request, state, cmd, err);
5171 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005172 &exception);
5173 } while (exception.retry);
5174 return err;
5175}
5176
5177static int do_vfs_lock(struct file *file, struct file_lock *fl)
5178{
5179 int res = 0;
5180 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5181 case FL_POSIX:
5182 res = posix_lock_file_wait(file, fl);
5183 break;
5184 case FL_FLOCK:
5185 res = flock_lock_file_wait(file, fl);
5186 break;
5187 default:
5188 BUG();
5189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005190 return res;
5191}
5192
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005193struct nfs4_unlockdata {
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005194 struct nfs_locku_args arg;
5195 struct nfs_locku_res res;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005196 struct nfs4_lock_state *lsp;
5197 struct nfs_open_context *ctx;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005198 struct file_lock fl;
5199 const struct nfs_server *server;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005200 unsigned long timestamp;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005201};
5202
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005203static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5204 struct nfs_open_context *ctx,
5205 struct nfs4_lock_state *lsp,
5206 struct nfs_seqid *seqid)
5207{
5208 struct nfs4_unlockdata *p;
5209 struct inode *inode = lsp->ls_state->inode;
5210
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005211 p = kzalloc(sizeof(*p), GFP_NOFS);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005212 if (p == NULL)
5213 return NULL;
5214 p->arg.fh = NFS_FH(inode);
5215 p->arg.fl = &p->fl;
5216 p->arg.seqid = seqid;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005217 p->res.seqid = seqid;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005218 p->arg.stateid = &lsp->ls_stateid;
5219 p->lsp = lsp;
5220 atomic_inc(&lsp->ls_count);
5221 /* Ensure we don't close file until we're done freeing locks! */
5222 p->ctx = get_nfs_open_context(ctx);
5223 memcpy(&p->fl, fl, sizeof(p->fl));
5224 p->server = NFS_SERVER(inode);
5225 return p;
5226}
5227
Trond Myklebust06f814a2006-01-03 09:55:07 +01005228static void nfs4_locku_release_calldata(void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005229{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005230 struct nfs4_unlockdata *calldata = data;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005231 nfs_free_seqid(calldata->arg.seqid);
Trond Myklebust06f814a2006-01-03 09:55:07 +01005232 nfs4_put_lock_state(calldata->lsp);
5233 put_nfs_open_context(calldata->ctx);
5234 kfree(calldata);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005235}
5236
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005237static void nfs4_locku_done(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005238{
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005239 struct nfs4_unlockdata *calldata = data;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005240
Trond Myklebust14516c32010-07-31 14:29:06 -04005241 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5242 return;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005243 switch (task->tk_status) {
5244 case 0:
Trond Myklebustf597c532012-03-04 18:13:56 -05005245 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5246 &calldata->res.stateid);
Trond Myklebust26e976a2006-01-03 09:55:21 +01005247 renew_lease(calldata->server, calldata->timestamp);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005248 break;
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005249 case -NFS4ERR_BAD_STATEID:
5250 case -NFS4ERR_OLD_STATEID:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005251 case -NFS4ERR_STALE_STATEID:
5252 case -NFS4ERR_EXPIRED:
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005253 break;
5254 default:
Trond Myklebust9e33bed2008-12-23 15:21:46 -05005255 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
Trond Myklebustd00c5d42011-10-19 12:17:29 -07005256 rpc_restart_call_prepare(task);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005257 }
Trond Myklebust2b1bc302012-10-29 18:53:23 -04005258 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005259}
5260
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005261static void nfs4_locku_prepare(struct rpc_task *task, void *data)
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005262{
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005263 struct nfs4_unlockdata *calldata = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005264
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005265 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005266 goto out_wait;
Trond Myklebust795a88c2012-09-10 13:26:49 -04005267 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005268 /* Note: exit _without_ running nfs4_locku_done */
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005269 goto out_no_action;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005270 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005271 calldata->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005272 if (nfs4_setup_sequence(calldata->server,
Andy Adamsona8936932009-04-01 09:22:23 -04005273 &calldata->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005274 &calldata->res.seq_res,
5275 task) != 0)
5276 nfs_release_seqid(calldata->arg.seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005277 return;
5278out_no_action:
5279 task->tk_action = NULL;
5280out_wait:
5281 nfs4_sequence_done(task, &calldata->res.seq_res);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005282}
5283
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005284static const struct rpc_call_ops nfs4_locku_ops = {
Trond Myklebust4ce70ad2006-01-03 09:55:05 +01005285 .rpc_call_prepare = nfs4_locku_prepare,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005286 .rpc_call_done = nfs4_locku_done,
Trond Myklebust06f814a2006-01-03 09:55:07 +01005287 .rpc_release = nfs4_locku_release_calldata,
Trond Myklebust963d8fe2006-01-03 09:55:04 +01005288};
5289
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005290static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5291 struct nfs_open_context *ctx,
5292 struct nfs4_lock_state *lsp,
5293 struct nfs_seqid *seqid)
5294{
5295 struct nfs4_unlockdata *data;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005296 struct rpc_message msg = {
5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5298 .rpc_cred = ctx->cred,
5299 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005300 struct rpc_task_setup task_setup_data = {
5301 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005302 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005303 .callback_ops = &nfs4_locku_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005304 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005305 .flags = RPC_TASK_ASYNC,
5306 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005307
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04005308 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5309 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5310
Frank Filz137d6ac2007-07-09 15:32:29 -07005311 /* Ensure this is an unlock - when canceling a lock, the
5312 * canceled lock is passed in, and it won't be an unlock.
5313 */
5314 fl->fl_type = F_UNLCK;
5315
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005316 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5317 if (data == NULL) {
5318 nfs_free_seqid(seqid);
5319 return ERR_PTR(-ENOMEM);
5320 }
5321
Chuck Levera9c92d62013-08-09 12:48:18 -04005322 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005323 msg.rpc_argp = &data->arg;
5324 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005325 task_setup_data.callback_data = data;
5326 return rpc_run_task(&task_setup_data);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005327}
5328
Linus Torvalds1da177e2005-04-16 15:20:36 -07005329static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5330{
Trond Myklebust65b62a22013-02-07 10:54:07 -05005331 struct inode *inode = state->inode;
5332 struct nfs4_state_owner *sp = state->owner;
5333 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005334 struct nfs_seqid *seqid;
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005335 struct nfs4_lock_state *lsp;
Trond Myklebust06f814a2006-01-03 09:55:07 +01005336 struct rpc_task *task;
5337 int status = 0;
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005338 unsigned char fl_flags = request->fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005339
Trond Myklebust9b073572006-06-29 16:38:34 -04005340 status = nfs4_set_lock_state(state, request);
5341 /* Unlock _before_ we do the RPC call */
5342 request->fl_flags |= FL_EXISTS;
Trond Myklebust65b62a22013-02-07 10:54:07 -05005343 /* Exclude nfs_delegation_claim_locks() */
5344 mutex_lock(&sp->so_delegreturn_mutex);
5345 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005346 down_read(&nfsi->rwsem);
5347 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5348 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005349 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005350 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005351 }
5352 up_read(&nfsi->rwsem);
Trond Myklebust65b62a22013-02-07 10:54:07 -05005353 mutex_unlock(&sp->so_delegreturn_mutex);
Trond Myklebust9b073572006-06-29 16:38:34 -04005354 if (status != 0)
5355 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005356 /* Is this a delegated lock? */
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005357 lsp = request->fl_u.nfs4_fl.owner;
Trond Myklebustc5a2a152013-04-30 12:43:42 -04005358 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5359 goto out;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005360 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
Trond Myklebust9b073572006-06-29 16:38:34 -04005361 status = -ENOMEM;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005362 if (seqid == NULL)
Trond Myklebust9b073572006-06-29 16:38:34 -04005363 goto out;
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005364 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005365 status = PTR_ERR(task);
5366 if (IS_ERR(task))
Trond Myklebust9b073572006-06-29 16:38:34 -04005367 goto out;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005368 status = nfs4_wait_for_completion_rpc_task(task);
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005369 rpc_put_task(task);
Trond Myklebust9b073572006-06-29 16:38:34 -04005370out:
Trond Myklebust536ff0f2008-04-04 15:08:02 -04005371 request->fl_flags = fl_flags;
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005372 trace_nfs4_unlock(request, state, F_SETLK, status);
Trond Myklebustfaf5f492005-10-18 14:20:15 -07005373 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005374}
5375
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005376struct nfs4_lockdata {
5377 struct nfs_lock_args arg;
Trond Myklebust911d1aa2006-01-03 09:55:16 +01005378 struct nfs_lock_res res;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005379 struct nfs4_lock_state *lsp;
5380 struct nfs_open_context *ctx;
5381 struct file_lock fl;
Trond Myklebust26e976a2006-01-03 09:55:21 +01005382 unsigned long timestamp;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005383 int rpc_status;
5384 int cancelled;
Andy Adamson66179ef2009-04-01 09:22:22 -04005385 struct nfs_server *server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005386};
5387
5388static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005389 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5390 gfp_t gfp_mask)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005391{
5392 struct nfs4_lockdata *p;
5393 struct inode *inode = lsp->ls_state->inode;
5394 struct nfs_server *server = NFS_SERVER(inode);
5395
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005396 p = kzalloc(sizeof(*p), gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005397 if (p == NULL)
5398 return NULL;
5399
5400 p->arg.fh = NFS_FH(inode);
5401 p->arg.fl = &p->fl;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005402 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005403 if (p->arg.open_seqid == NULL)
5404 goto out_free;
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005405 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005406 if (p->arg.lock_seqid == NULL)
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005407 goto out_free_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005408 p->arg.lock_stateid = &lsp->ls_stateid;
David Howells7539bba2006-08-22 20:06:09 -04005409 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
Trond Myklebust48c22eb2012-01-17 22:04:25 -05005410 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
Trond Myklebustd035c362010-12-21 10:45:27 -05005411 p->arg.lock_owner.s_dev = server->s_dev;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005412 p->res.lock_seqid = p->arg.lock_seqid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005413 p->lsp = lsp;
Andy Adamson66179ef2009-04-01 09:22:22 -04005414 p->server = server;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005415 atomic_inc(&lsp->ls_count);
5416 p->ctx = get_nfs_open_context(ctx);
5417 memcpy(&p->fl, fl, sizeof(p->fl));
5418 return p;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005419out_free_seqid:
5420 nfs_free_seqid(p->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005421out_free:
5422 kfree(p);
5423 return NULL;
5424}
5425
5426static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5427{
5428 struct nfs4_lockdata *data = calldata;
5429 struct nfs4_state *state = data->lsp->ls_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005430
Harvey Harrison3110ff82008-05-02 13:42:44 -07005431 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005432 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005433 goto out_wait;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005434 /* Do we need to do an open_to_lock_owner? */
5435 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005436 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005437 goto out_release_lock_seqid;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005438 }
Trond Myklebust8e472f32013-04-20 01:30:53 -04005439 data->arg.open_stateid = &state->open_stateid;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005440 data->arg.new_lock_owner = 1;
Trond Myklebustc1d51932008-04-07 13:20:54 -04005441 data->res.open_seqid = data->arg.open_seqid;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005442 } else
5443 data->arg.new_lock_owner = 0;
Trond Myklebust5d422302013-03-14 16:57:48 -04005444 if (!nfs4_valid_open_stateid(state)) {
5445 data->rpc_status = -EBADF;
5446 task->tk_action = NULL;
5447 goto out_release_open_seqid;
5448 }
Trond Myklebust26e976a2006-01-03 09:55:21 +01005449 data->timestamp = jiffies;
Trond Myklebust035168a2010-06-16 09:52:26 -04005450 if (nfs4_setup_sequence(data->server,
5451 &data->arg.seq_args,
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005452 &data->res.seq_res,
Trond Myklebustd9afbd12012-10-22 20:28:44 -04005453 task) == 0)
Andy Adamson66179ef2009-04-01 09:22:22 -04005454 return;
Trond Myklebust5d422302013-03-14 16:57:48 -04005455out_release_open_seqid:
Trond Myklebust2240a9e2012-10-29 18:37:40 -04005456 nfs_release_seqid(data->arg.open_seqid);
5457out_release_lock_seqid:
5458 nfs_release_seqid(data->arg.lock_seqid);
Trond Myklebustc8da19b2013-02-11 19:01:21 -05005459out_wait:
5460 nfs4_sequence_done(task, &data->res.seq_res);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005461 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
Alexandros Batsakisb2579572009-12-14 21:27:57 -08005462}
5463
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005464static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5465{
5466 struct nfs4_lockdata *data = calldata;
5467
Harvey Harrison3110ff82008-05-02 13:42:44 -07005468 dprintk("%s: begin!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005469
Trond Myklebust14516c32010-07-31 14:29:06 -04005470 if (!nfs4_sequence_done(task, &data->res.seq_res))
5471 return;
Andy Adamson66179ef2009-04-01 09:22:22 -04005472
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005473 data->rpc_status = task->tk_status;
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005474 if (data->arg.new_lock_owner != 0) {
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005475 if (data->rpc_status == 0)
5476 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5477 else
5478 goto out;
5479 }
5480 if (data->rpc_status == 0) {
Trond Myklebustf597c532012-03-04 18:13:56 -05005481 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005482 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
Al Viro3d4ff432011-06-22 18:40:12 -04005483 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005484 }
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005485out:
Harvey Harrison3110ff82008-05-02 13:42:44 -07005486 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005487}
5488
5489static void nfs4_lock_release(void *calldata)
5490{
5491 struct nfs4_lockdata *data = calldata;
5492
Harvey Harrison3110ff82008-05-02 13:42:44 -07005493 dprintk("%s: begin!\n", __func__);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05005494 nfs_free_seqid(data->arg.open_seqid);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005495 if (data->cancelled != 0) {
5496 struct rpc_task *task;
5497 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5498 data->arg.lock_seqid);
5499 if (!IS_ERR(task))
Trond Myklebustbf294b42011-02-21 11:05:41 -08005500 rpc_put_task_async(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005501 dprintk("%s: cancelling lock!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005502 } else
5503 nfs_free_seqid(data->arg.lock_seqid);
5504 nfs4_put_lock_state(data->lsp);
5505 put_nfs_open_context(data->ctx);
5506 kfree(data);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005507 dprintk("%s: done!\n", __func__);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005508}
5509
5510static const struct rpc_call_ops nfs4_lock_ops = {
5511 .rpc_call_prepare = nfs4_lock_prepare,
5512 .rpc_call_done = nfs4_lock_done,
5513 .rpc_release = nfs4_lock_release,
5514};
5515
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005516static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5517{
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005518 switch (error) {
5519 case -NFS4ERR_ADMIN_REVOKED:
5520 case -NFS4ERR_BAD_STATEID:
Trond Myklebustecac7992011-03-09 16:00:56 -05005521 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005522 if (new_lock_owner != 0 ||
Trond Myklebust795a88c2012-09-10 13:26:49 -04005523 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
Trond Myklebustecac7992011-03-09 16:00:56 -05005524 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005525 break;
5526 case -NFS4ERR_STALE_STATEID:
Trond Myklebusta2c0b9e2010-01-26 15:42:47 -05005527 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
Trond Myklebustecac7992011-03-09 16:00:56 -05005528 case -NFS4ERR_EXPIRED:
5529 nfs4_schedule_lease_recovery(server->nfs_client);
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005530 };
5531}
5532
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005533static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005534{
5535 struct nfs4_lockdata *data;
5536 struct rpc_task *task;
Trond Myklebust5138fde2007-07-14 15:40:01 -04005537 struct rpc_message msg = {
5538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5539 .rpc_cred = state->owner->so_cred,
5540 };
Trond Myklebustc970aa82007-07-14 15:39:59 -04005541 struct rpc_task_setup task_setup_data = {
5542 .rpc_client = NFS_CLIENT(state->inode),
Trond Myklebust5138fde2007-07-14 15:40:01 -04005543 .rpc_message = &msg,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005544 .callback_ops = &nfs4_lock_ops,
Trond Myklebust101070c2008-02-19 20:04:23 -05005545 .workqueue = nfsiod_workqueue,
Trond Myklebustc970aa82007-07-14 15:39:59 -04005546 .flags = RPC_TASK_ASYNC,
5547 };
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005548 int ret;
5549
Harvey Harrison3110ff82008-05-02 13:42:44 -07005550 dprintk("%s: begin!\n", __func__);
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005551 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
Trond Myklebust8535b2b2010-05-13 12:51:01 -04005552 fl->fl_u.nfs4_fl.owner,
5553 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005554 if (data == NULL)
5555 return -ENOMEM;
5556 if (IS_SETLKW(cmd))
5557 data->arg.block = 1;
Chuck Levera9c92d62013-08-09 12:48:18 -04005558 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
Trond Myklebust1174dd12010-12-21 10:52:24 -05005559 msg.rpc_argp = &data->arg;
5560 msg.rpc_resp = &data->res;
Trond Myklebustc970aa82007-07-14 15:39:59 -04005561 task_setup_data.callback_data = data;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04005562 if (recovery_type > NFS_LOCK_NEW) {
5563 if (recovery_type == NFS_LOCK_RECLAIM)
5564 data->arg.reclaim = NFS_LOCK_RECLAIM;
5565 nfs4_set_sequence_privileged(&data->arg.seq_args);
5566 }
Trond Myklebustc970aa82007-07-14 15:39:59 -04005567 task = rpc_run_task(&task_setup_data);
Trond Myklebust7a1218a2006-03-20 18:11:10 -05005568 if (IS_ERR(task))
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005569 return PTR_ERR(task);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005570 ret = nfs4_wait_for_completion_rpc_task(task);
5571 if (ret == 0) {
5572 ret = data->rpc_status;
Trond Myklebust2bee72a2010-01-26 15:42:21 -05005573 if (ret)
5574 nfs4_handle_setlk_error(data->server, data->lsp,
5575 data->arg.new_lock_owner, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005576 } else
5577 data->cancelled = 1;
Trond Myklebuste6b3c4d2006-11-11 22:18:03 -05005578 rpc_put_task(task);
Harvey Harrison3110ff82008-05-02 13:42:44 -07005579 dprintk("%s: done, ret = %d!\n", __func__, ret);
Trond Myklebusta5d16a42006-01-03 09:55:17 +01005580 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005581}
5582
5583static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5584{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005585 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005586 struct nfs4_exception exception = {
5587 .inode = state->inode,
5588 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005589 int err;
5590
5591 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005592 /* Cache the lock if possible... */
5593 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5594 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005595 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005596 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
Trond Myklebust168667c2010-10-19 19:47:49 -04005597 if (err != -NFS4ERR_DELAY)
Trond Myklebust202b50d2005-06-22 17:16:29 +00005598 break;
5599 nfs4_handle_exception(server, err, &exception);
5600 } while (exception.retry);
5601 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005602}
5603
5604static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5605{
Trond Myklebust202b50d2005-06-22 17:16:29 +00005606 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust05ffe242012-04-18 12:20:10 -04005607 struct nfs4_exception exception = {
5608 .inode = state->inode,
5609 };
Trond Myklebust202b50d2005-06-22 17:16:29 +00005610 int err;
5611
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005612 err = nfs4_set_lock_state(state, request);
5613 if (err != 0)
5614 return err;
Trond Myklebustf6de7a32013-09-04 10:08:54 -04005615 if (!recover_lost_locks) {
NeilBrownef1820f2013-09-04 17:04:49 +10005616 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5617 return 0;
5618 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005619 do {
Trond Myklebust42a2d132006-06-29 16:38:36 -04005620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5621 return 0;
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005622 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005623 trace_nfs4_lock_expired(request, state, F_SETLK, err);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005624 switch (err) {
5625 default:
5626 goto out;
5627 case -NFS4ERR_GRACE:
5628 case -NFS4ERR_DELAY:
5629 nfs4_handle_exception(server, err, &exception);
5630 err = 0;
5631 }
Trond Myklebust202b50d2005-06-22 17:16:29 +00005632 } while (exception.retry);
Trond Myklebusta9ed2e22009-12-03 15:53:21 -05005633out:
Trond Myklebust202b50d2005-06-22 17:16:29 +00005634 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005635}
5636
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005637#if defined(CONFIG_NFS_V4_1)
Chuck Lever3e60ffd2012-07-11 16:30:14 -04005638/**
5639 * nfs41_check_expired_locks - possibly free a lock stateid
5640 *
5641 * @state: NFSv4 state for an inode
5642 *
5643 * Returns NFS_OK if recovery for this stateid is now finished.
5644 * Otherwise a negative NFS4ERR value is returned.
5645 */
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005646static int nfs41_check_expired_locks(struct nfs4_state *state)
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005647{
Chuck Levereb64cf92012-07-11 16:30:05 -04005648 int status, ret = -NFS4ERR_BAD_STATEID;
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005649 struct nfs4_lock_state *lsp;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005650 struct nfs_server *server = NFS_SERVER(state->inode);
5651
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005652 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
Trond Myklebust795a88c2012-09-10 13:26:49 -04005653 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04005654 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5655
5656 status = nfs41_test_stateid(server,
5657 &lsp->ls_stateid,
5658 cred);
Trond Myklebust08cb47f2013-08-20 21:59:40 -04005659 trace_nfs4_test_lock_stateid(state, lsp, status);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005660 if (status != NFS_OK) {
Chuck Lever3e60ffd2012-07-11 16:30:14 -04005661 /* Free the stateid unless the server
5662 * informs us the stateid is unrecognized. */
Chuck Lever89af2732012-07-11 16:29:56 -04005663 if (status != -NFS4ERR_BAD_STATEID)
5664 nfs41_free_stateid(server,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04005665 &lsp->ls_stateid,
5666 cred);
Trond Myklebust795a88c2012-09-10 13:26:49 -04005667 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
Bryan Schumakerb01dd1d2012-01-31 10:39:30 -05005668 ret = status;
5669 }
5670 }
5671 };
5672
5673 return ret;
5674}
5675
5676static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5677{
5678 int status = NFS_OK;
5679
5680 if (test_bit(LK_STATE_IN_USE, &state->flags))
5681 status = nfs41_check_expired_locks(state);
Chuck Levereb64cf92012-07-11 16:30:05 -04005682 if (status != NFS_OK)
5683 status = nfs4_lock_expired(state, request);
5684 return status;
Bryan Schumakerf062eb62011-06-02 14:59:10 -04005685}
5686#endif
5687
Linus Torvalds1da177e2005-04-16 15:20:36 -07005688static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5689{
Trond Myklebust9a99af492013-02-04 20:17:49 -05005690 struct nfs4_state_owner *sp = state->owner;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005691 struct nfs_inode *nfsi = NFS_I(state->inode);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005692 unsigned char fl_flags = request->fl_flags;
Trond Myklebust9a99af492013-02-04 20:17:49 -05005693 unsigned int seq;
Trond Myklebust8e469eb2010-01-26 15:42:30 -05005694 int status = -ENOLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005695
Trond Myklebust8e469eb2010-01-26 15:42:30 -05005696 if ((fl_flags & FL_POSIX) &&
5697 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5698 goto out;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005699 /* Is this a delegated open? */
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005700 status = nfs4_set_lock_state(state, request);
5701 if (status != 0)
5702 goto out;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005703 request->fl_flags |= FL_ACCESS;
5704 status = do_vfs_lock(request->fl_file, request);
5705 if (status < 0)
5706 goto out;
Trond Myklebust19e03c52008-12-23 15:21:44 -05005707 down_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005708 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
Trond Myklebust01c3b862006-06-29 16:38:39 -04005709 /* Yes: cache locks! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04005710 /* ...but avoid races with delegation recall... */
Trond Myklebust19e03c52008-12-23 15:21:44 -05005711 request->fl_flags = fl_flags & ~FL_SLEEP;
5712 status = do_vfs_lock(request->fl_file, request);
5713 goto out_unlock;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005714 }
Trond Myklebust9a99af492013-02-04 20:17:49 -05005715 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5716 up_read(&nfsi->rwsem);
Alexandros Batsakisafe6c272009-12-09 01:50:14 -08005717 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005718 if (status != 0)
Trond Myklebust9a99af492013-02-04 20:17:49 -05005719 goto out;
5720 down_read(&nfsi->rwsem);
5721 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5722 status = -NFS4ERR_DELAY;
Trond Myklebust01c3b862006-06-29 16:38:39 -04005723 goto out_unlock;
Trond Myklebust9a99af492013-02-04 20:17:49 -05005724 }
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005725 /* Note: we always want to sleep here! */
Trond Myklebust01c3b862006-06-29 16:38:39 -04005726 request->fl_flags = fl_flags | FL_SLEEP;
Trond Myklebust6bfc93e2005-11-04 15:39:36 -05005727 if (do_vfs_lock(request->fl_file, request) < 0)
Weston Andros Adamsona0308892012-01-26 13:32:23 -05005728 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5729 "manager!\n", __func__);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005730out_unlock:
Trond Myklebust19e03c52008-12-23 15:21:44 -05005731 up_read(&nfsi->rwsem);
Trond Myklebust01c3b862006-06-29 16:38:39 -04005732out:
5733 request->fl_flags = fl_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005734 return status;
5735}
5736
5737static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5738{
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05005739 struct nfs4_exception exception = {
5740 .state = state,
Trond Myklebust05ffe242012-04-18 12:20:10 -04005741 .inode = state->inode,
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05005742 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07005743 int err;
5744
5745 do {
Trond Myklebust965b5d62009-06-17 13:22:59 -07005746 err = _nfs4_proc_setlk(state, cmd, request);
Trond Myklebustd1b748a2013-08-12 16:35:20 -04005747 trace_nfs4_set_lock(request, state, cmd, err);
Trond Myklebust965b5d62009-06-17 13:22:59 -07005748 if (err == -NFS4ERR_DENIED)
5749 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005750 err = nfs4_handle_exception(NFS_SERVER(state->inode),
Trond Myklebust965b5d62009-06-17 13:22:59 -07005751 err, &exception);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005752 } while (exception.retry);
5753 return err;
5754}
5755
5756static int
5757nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5758{
5759 struct nfs_open_context *ctx;
5760 struct nfs4_state *state;
5761 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5762 int status;
5763
5764 /* verify open state */
Trond Myklebustcd3758e2007-08-10 17:44:32 -04005765 ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005766 state = ctx->state;
5767
5768 if (request->fl_start < 0 || request->fl_end < 0)
5769 return -EINVAL;
5770
Trond Myklebustd9531262009-07-21 19:22:38 -04005771 if (IS_GETLK(cmd)) {
5772 if (state != NULL)
5773 return nfs4_proc_getlk(state, F_GETLK, request);
5774 return 0;
5775 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005776
5777 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5778 return -EINVAL;
5779
Trond Myklebustd9531262009-07-21 19:22:38 -04005780 if (request->fl_type == F_UNLCK) {
5781 if (state != NULL)
5782 return nfs4_proc_unlck(state, cmd, request);
5783 return 0;
5784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005785
Trond Myklebustd9531262009-07-21 19:22:38 -04005786 if (state == NULL)
5787 return -ENOLCK;
Trond Myklebust55725512012-04-18 12:48:35 -04005788 /*
5789 * Don't rely on the VFS having checked the file open mode,
5790 * since it won't do this for flock() locks.
5791 */
Jeff Laytonf44106e2012-07-23 15:49:56 -04005792 switch (request->fl_type) {
Trond Myklebust55725512012-04-18 12:48:35 -04005793 case F_RDLCK:
5794 if (!(filp->f_mode & FMODE_READ))
5795 return -EBADF;
5796 break;
5797 case F_WRLCK:
5798 if (!(filp->f_mode & FMODE_WRITE))
5799 return -EBADF;
5800 }
5801
Linus Torvalds1da177e2005-04-16 15:20:36 -07005802 do {
5803 status = nfs4_proc_setlk(state, cmd, request);
5804 if ((status != -EAGAIN) || IS_SETLK(cmd))
5805 break;
5806 timeout = nfs4_set_lock_task_retry(timeout);
5807 status = -ERESTARTSYS;
5808 if (signalled())
5809 break;
5810 } while(status < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005811 return status;
5812}
5813
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04005814int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
Trond Myklebust888e6942005-11-04 15:38:11 -05005815{
5816 struct nfs_server *server = NFS_SERVER(state->inode);
Trond Myklebust888e6942005-11-04 15:38:11 -05005817 int err;
5818
5819 err = nfs4_set_lock_state(state, fl);
5820 if (err != 0)
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04005821 return err;
Trond Myklebust4a706fa2013-04-01 14:47:22 -04005822 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
Trond Myklebustdb4f2e632013-04-01 15:56:46 -04005823 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
Trond Myklebust888e6942005-11-04 15:38:11 -05005824}
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005825
Trond Myklebustcf470c32012-03-07 13:49:12 -05005826struct nfs_release_lockowner_data {
5827 struct nfs4_lock_state *lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04005828 struct nfs_server *server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05005829 struct nfs_release_lockowner_args args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005830 struct nfs_release_lockowner_res res;
Chuck Lever60ea6812013-10-17 14:13:47 -04005831 unsigned long timestamp;
Trond Myklebustcf470c32012-03-07 13:49:12 -05005832};
5833
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005834static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5835{
5836 struct nfs_release_lockowner_data *data = calldata;
5837 nfs40_setup_sequence(data->server,
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005838 &data->args.seq_args, &data->res.seq_res, task);
Chuck Lever60ea6812013-10-17 14:13:47 -04005839 data->timestamp = jiffies;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005840}
5841
5842static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5843{
5844 struct nfs_release_lockowner_data *data = calldata;
Chuck Lever60ea6812013-10-17 14:13:47 -04005845 struct nfs_server *server = data->server;
5846
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005847 nfs40_sequence_done(task, &data->res.seq_res);
Chuck Lever60ea6812013-10-17 14:13:47 -04005848
5849 switch (task->tk_status) {
5850 case 0:
5851 renew_lease(server, data->timestamp);
5852 break;
5853 case -NFS4ERR_STALE_CLIENTID:
5854 case -NFS4ERR_EXPIRED:
5855 case -NFS4ERR_LEASE_MOVED:
5856 case -NFS4ERR_DELAY:
5857 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5858 rpc_restart_call_prepare(task);
5859 }
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005860}
5861
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005862static void nfs4_release_lockowner_release(void *calldata)
5863{
Trond Myklebustcf470c32012-03-07 13:49:12 -05005864 struct nfs_release_lockowner_data *data = calldata;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04005865 nfs4_free_lock_state(data->server, data->lsp);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005866 kfree(calldata);
5867}
5868
Trond Myklebust17280172012-03-11 13:11:00 -04005869static const struct rpc_call_ops nfs4_release_lockowner_ops = {
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005870 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5871 .rpc_call_done = nfs4_release_lockowner_done,
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005872 .rpc_release = nfs4_release_lockowner_release,
5873};
5874
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04005875static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005876{
Trond Myklebustcf470c32012-03-07 13:49:12 -05005877 struct nfs_release_lockowner_data *data;
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005878 struct rpc_message msg = {
5879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5880 };
5881
5882 if (server->nfs_client->cl_mvops->minor_version != 0)
Trond Myklebustcf470c32012-03-07 13:49:12 -05005883 return -EINVAL;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005884
Trond Myklebustcf470c32012-03-07 13:49:12 -05005885 data = kmalloc(sizeof(*data), GFP_NOFS);
5886 if (!data)
5887 return -ENOMEM;
5888 data->lsp = lsp;
Trond Myklebust5ae67c42012-03-19 16:17:18 -04005889 data->server = server;
Trond Myklebustcf470c32012-03-07 13:49:12 -05005890 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5891 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5892 data->args.lock_owner.s_dev = server->s_dev;
Chuck Leverfbd4bfd2013-08-09 12:49:38 -04005893
Trond Myklebustcf470c32012-03-07 13:49:12 -05005894 msg.rpc_argp = &data->args;
Trond Myklebustb7e63a12014-02-26 11:19:14 -08005895 msg.rpc_resp = &data->res;
5896 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebustcf470c32012-03-07 13:49:12 -05005897 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5898 return 0;
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -04005899}
5900
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00005901#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5902
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005903static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5904 const void *buf, size_t buflen,
5905 int flags, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005906{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005907 if (strcmp(key, "") != 0)
5908 return -EINVAL;
J. Bruce Fields4b580ee2005-06-22 17:16:23 +00005909
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005910 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005911}
5912
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005913static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5914 void *buf, size_t buflen, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005915{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005916 if (strcmp(key, "") != 0)
5917 return -EINVAL;
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00005918
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005919 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005920}
5921
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005922static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5923 size_t list_len, const char *name,
5924 size_t name_len, int type)
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005925{
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005926 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005927
J. Bruce Fields096455a2006-03-20 23:23:42 -05005928 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5929 return 0;
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00005930
5931 if (list && len <= list_len)
5932 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
J. Bruce Fieldsaa1870a2005-06-22 17:16:22 +00005933 return len;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00005934}
5935
David Quigleyc9bccef2013-05-22 12:50:45 -04005936#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5937static inline int nfs4_server_supports_labels(struct nfs_server *server)
5938{
5939 return server->caps & NFS_CAP_SECURITY_LABEL;
5940}
5941
5942static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5943 const void *buf, size_t buflen,
5944 int flags, int type)
5945{
5946 if (security_ismaclabel(key))
5947 return nfs4_set_security_label(dentry, buf, buflen);
5948
5949 return -EOPNOTSUPP;
5950}
5951
5952static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5953 void *buf, size_t buflen, int type)
5954{
5955 if (security_ismaclabel(key))
5956 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5957 return -EOPNOTSUPP;
5958}
5959
5960static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5961 size_t list_len, const char *name,
5962 size_t name_len, int type)
5963{
5964 size_t len = 0;
5965
5966 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5967 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5968 if (list && len <= list_len)
5969 security_inode_listsecurity(dentry->d_inode, list, len);
5970 }
5971 return len;
5972}
5973
5974static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5975 .prefix = XATTR_SECURITY_PREFIX,
5976 .list = nfs4_xattr_list_nfs4_label,
5977 .get = nfs4_xattr_get_nfs4_label,
5978 .set = nfs4_xattr_set_nfs4_label,
5979};
5980#endif
5981
5982
Andy Adamson533eb462011-06-13 18:25:56 -04005983/*
5984 * nfs_fhget will use either the mounted_on_fileid or the fileid
5985 */
Trond Myklebust69aaaae2009-03-11 14:10:28 -04005986static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5987{
Andy Adamson533eb462011-06-13 18:25:56 -04005988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5990 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Chuck Lever81934dd2012-03-01 17:01:57 -05005991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
Trond Myklebust69aaaae2009-03-11 14:10:28 -04005992 return;
5993
5994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
Chuck Lever81934dd2012-03-01 17:01:57 -05005995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
Trond Myklebust69aaaae2009-03-11 14:10:28 -04005996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5997 fattr->nlink = 2;
5998}
5999
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006000static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6001 const struct qstr *name,
6002 struct nfs4_fs_locations *fs_locations,
6003 struct page *page)
Trond Myklebust683b57b2006-06-09 09:34:22 -04006004{
6005 struct nfs_server *server = NFS_SERVER(dir);
David Quigleya09df2c2013-05-22 12:50:41 -04006006 u32 bitmask[3] = {
Manoj Naik361e6242006-06-09 09:34:24 -04006007 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006008 };
6009 struct nfs4_fs_locations_arg args = {
6010 .dir_fh = NFS_FH(dir),
Trond Myklebustc228fd32007-01-13 02:28:11 -05006011 .name = name,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006012 .page = page,
6013 .bitmask = bitmask,
6014 };
Benny Halevy22958462009-04-01 09:22:02 -04006015 struct nfs4_fs_locations_res res = {
6016 .fs_locations = fs_locations,
6017 };
Trond Myklebust683b57b2006-06-09 09:34:22 -04006018 struct rpc_message msg = {
6019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6020 .rpc_argp = &args,
Benny Halevy22958462009-04-01 09:22:02 -04006021 .rpc_resp = &res,
Trond Myklebust683b57b2006-06-09 09:34:22 -04006022 };
6023 int status;
6024
Harvey Harrison3110ff82008-05-02 13:42:44 -07006025 dprintk("%s: start\n", __func__);
Andy Adamson533eb462011-06-13 18:25:56 -04006026
6027 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6028 * is not supported */
6029 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6030 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6031 else
6032 bitmask[0] |= FATTR4_WORD0_FILEID;
6033
Trond Myklebustc228fd32007-01-13 02:28:11 -05006034 nfs_fattr_init(&fs_locations->fattr);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006035 fs_locations->server = server;
Manoj Naik830b8e32006-06-09 09:34:25 -04006036 fs_locations->nlocations = 0;
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006037 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -07006038 dprintk("%s: returned status = %d\n", __func__, status);
Trond Myklebust683b57b2006-06-09 09:34:22 -04006039 return status;
6040}
6041
Bryan Schumakerf05d1472012-04-27 13:27:41 -04006042int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6043 const struct qstr *name,
6044 struct nfs4_fs_locations *fs_locations,
6045 struct page *page)
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006046{
6047 struct nfs4_exception exception = { };
6048 int err;
6049 do {
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006050 err = _nfs4_proc_fs_locations(client, dir, name,
6051 fs_locations, page);
6052 trace_nfs4_get_fs_locations(dir, name, err);
6053 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumakerdb0a9592012-04-27 13:27:39 -04006054 &exception);
6055 } while (exception.retry);
6056 return err;
6057}
6058
Chuck Leverb03d7352013-10-17 14:12:50 -04006059/*
6060 * This operation also signals the server that this client is
6061 * performing migration recovery. The server can stop returning
6062 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6063 * appended to this compound to identify the client ID which is
6064 * performing recovery.
6065 */
6066static int _nfs40_proc_get_locations(struct inode *inode,
6067 struct nfs4_fs_locations *locations,
6068 struct page *page, struct rpc_cred *cred)
6069{
6070 struct nfs_server *server = NFS_SERVER(inode);
6071 struct rpc_clnt *clnt = server->client;
6072 u32 bitmask[2] = {
6073 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6074 };
6075 struct nfs4_fs_locations_arg args = {
6076 .clientid = server->nfs_client->cl_clientid,
6077 .fh = NFS_FH(inode),
6078 .page = page,
6079 .bitmask = bitmask,
6080 .migration = 1, /* skip LOOKUP */
6081 .renew = 1, /* append RENEW */
6082 };
6083 struct nfs4_fs_locations_res res = {
6084 .fs_locations = locations,
6085 .migration = 1,
6086 .renew = 1,
6087 };
6088 struct rpc_message msg = {
6089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6090 .rpc_argp = &args,
6091 .rpc_resp = &res,
6092 .rpc_cred = cred,
6093 };
6094 unsigned long now = jiffies;
6095 int status;
6096
6097 nfs_fattr_init(&locations->fattr);
6098 locations->server = server;
6099 locations->nlocations = 0;
6100
6101 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6102 nfs4_set_sequence_privileged(&args.seq_args);
6103 status = nfs4_call_sync_sequence(clnt, server, &msg,
6104 &args.seq_args, &res.seq_res);
6105 if (status)
6106 return status;
6107
6108 renew_lease(server, now);
6109 return 0;
6110}
6111
6112#ifdef CONFIG_NFS_V4_1
6113
6114/*
6115 * This operation also signals the server that this client is
6116 * performing migration recovery. The server can stop asserting
6117 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6118 * performing this operation is identified in the SEQUENCE
6119 * operation in this compound.
6120 *
6121 * When the client supports GETATTR(fs_locations_info), it can
6122 * be plumbed in here.
6123 */
6124static int _nfs41_proc_get_locations(struct inode *inode,
6125 struct nfs4_fs_locations *locations,
6126 struct page *page, struct rpc_cred *cred)
6127{
6128 struct nfs_server *server = NFS_SERVER(inode);
6129 struct rpc_clnt *clnt = server->client;
6130 u32 bitmask[2] = {
6131 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6132 };
6133 struct nfs4_fs_locations_arg args = {
6134 .fh = NFS_FH(inode),
6135 .page = page,
6136 .bitmask = bitmask,
6137 .migration = 1, /* skip LOOKUP */
6138 };
6139 struct nfs4_fs_locations_res res = {
6140 .fs_locations = locations,
6141 .migration = 1,
6142 };
6143 struct rpc_message msg = {
6144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6145 .rpc_argp = &args,
6146 .rpc_resp = &res,
6147 .rpc_cred = cred,
6148 };
6149 int status;
6150
6151 nfs_fattr_init(&locations->fattr);
6152 locations->server = server;
6153 locations->nlocations = 0;
6154
6155 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6156 nfs4_set_sequence_privileged(&args.seq_args);
6157 status = nfs4_call_sync_sequence(clnt, server, &msg,
6158 &args.seq_args, &res.seq_res);
6159 if (status == NFS4_OK &&
6160 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6161 status = -NFS4ERR_LEASE_MOVED;
6162 return status;
6163}
6164
6165#endif /* CONFIG_NFS_V4_1 */
6166
6167/**
6168 * nfs4_proc_get_locations - discover locations for a migrated FSID
6169 * @inode: inode on FSID that is migrating
6170 * @locations: result of query
6171 * @page: buffer
6172 * @cred: credential to use for this operation
6173 *
6174 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6175 * operation failed, or a negative errno if a local error occurred.
6176 *
6177 * On success, "locations" is filled in, but if the server has
6178 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6179 * asserted.
6180 *
6181 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6182 * from this client that require migration recovery.
6183 */
6184int nfs4_proc_get_locations(struct inode *inode,
6185 struct nfs4_fs_locations *locations,
6186 struct page *page, struct rpc_cred *cred)
6187{
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct nfs_client *clp = server->nfs_client;
6190 const struct nfs4_mig_recovery_ops *ops =
6191 clp->cl_mvops->mig_recovery_ops;
6192 struct nfs4_exception exception = { };
6193 int status;
6194
6195 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6196 (unsigned long long)server->fsid.major,
6197 (unsigned long long)server->fsid.minor,
6198 clp->cl_hostname);
6199 nfs_display_fhandle(NFS_FH(inode), __func__);
6200
6201 do {
6202 status = ops->get_locations(inode, locations, page, cred);
6203 if (status != -NFS4ERR_DELAY)
6204 break;
6205 nfs4_handle_exception(server, status, &exception);
6206 } while (exception.retry);
6207 return status;
6208}
6209
Chuck Lever44c99932013-10-17 14:13:30 -04006210/*
6211 * This operation also signals the server that this client is
6212 * performing "lease moved" recovery. The server can stop
6213 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6214 * is appended to this compound to identify the client ID which is
6215 * performing recovery.
6216 */
6217static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6218{
6219 struct nfs_server *server = NFS_SERVER(inode);
6220 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6221 struct rpc_clnt *clnt = server->client;
6222 struct nfs4_fsid_present_arg args = {
6223 .fh = NFS_FH(inode),
6224 .clientid = clp->cl_clientid,
6225 .renew = 1, /* append RENEW */
6226 };
6227 struct nfs4_fsid_present_res res = {
6228 .renew = 1,
6229 };
6230 struct rpc_message msg = {
6231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6232 .rpc_argp = &args,
6233 .rpc_resp = &res,
6234 .rpc_cred = cred,
6235 };
6236 unsigned long now = jiffies;
6237 int status;
6238
6239 res.fh = nfs_alloc_fhandle();
6240 if (res.fh == NULL)
6241 return -ENOMEM;
6242
6243 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6244 nfs4_set_sequence_privileged(&args.seq_args);
6245 status = nfs4_call_sync_sequence(clnt, server, &msg,
6246 &args.seq_args, &res.seq_res);
6247 nfs_free_fhandle(res.fh);
6248 if (status)
6249 return status;
6250
6251 do_renew_lease(clp, now);
6252 return 0;
6253}
6254
6255#ifdef CONFIG_NFS_V4_1
6256
6257/*
6258 * This operation also signals the server that this client is
6259 * performing "lease moved" recovery. The server can stop asserting
6260 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6261 * this operation is identified in the SEQUENCE operation in this
6262 * compound.
6263 */
6264static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6265{
6266 struct nfs_server *server = NFS_SERVER(inode);
6267 struct rpc_clnt *clnt = server->client;
6268 struct nfs4_fsid_present_arg args = {
6269 .fh = NFS_FH(inode),
6270 };
6271 struct nfs4_fsid_present_res res = {
6272 };
6273 struct rpc_message msg = {
6274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6275 .rpc_argp = &args,
6276 .rpc_resp = &res,
6277 .rpc_cred = cred,
6278 };
6279 int status;
6280
6281 res.fh = nfs_alloc_fhandle();
6282 if (res.fh == NULL)
6283 return -ENOMEM;
6284
6285 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6286 nfs4_set_sequence_privileged(&args.seq_args);
6287 status = nfs4_call_sync_sequence(clnt, server, &msg,
6288 &args.seq_args, &res.seq_res);
6289 nfs_free_fhandle(res.fh);
6290 if (status == NFS4_OK &&
6291 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6292 status = -NFS4ERR_LEASE_MOVED;
6293 return status;
6294}
6295
6296#endif /* CONFIG_NFS_V4_1 */
6297
6298/**
6299 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6300 * @inode: inode on FSID to check
6301 * @cred: credential to use for this operation
6302 *
6303 * Server indicates whether the FSID is present, moved, or not
6304 * recognized. This operation is necessary to clear a LEASE_MOVED
6305 * condition for this client ID.
6306 *
6307 * Returns NFS4_OK if the FSID is present on this server,
6308 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6309 * NFS4ERR code if some error occurred on the server, or a
6310 * negative errno if a local failure occurred.
6311 */
6312int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6313{
6314 struct nfs_server *server = NFS_SERVER(inode);
6315 struct nfs_client *clp = server->nfs_client;
6316 const struct nfs4_mig_recovery_ops *ops =
6317 clp->cl_mvops->mig_recovery_ops;
6318 struct nfs4_exception exception = { };
6319 int status;
6320
6321 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6322 (unsigned long long)server->fsid.major,
6323 (unsigned long long)server->fsid.minor,
6324 clp->cl_hostname);
6325 nfs_display_fhandle(NFS_FH(inode), __func__);
6326
6327 do {
6328 status = ops->fsid_present(inode, cred);
6329 if (status != -NFS4ERR_DELAY)
6330 break;
6331 nfs4_handle_exception(server, status, &exception);
6332 } while (exception.retry);
6333 return status;
6334}
6335
Andy Adamson5ec16a82013-08-08 10:57:55 -04006336/**
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006337 * If 'use_integrity' is true and the state managment nfs_client
6338 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6339 * and the machine credential as per RFC3530bis and RFC5661 Security
6340 * Considerations sections. Otherwise, just use the user cred with the
6341 * filesystem's rpc_client.
Andy Adamson5ec16a82013-08-08 10:57:55 -04006342 */
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006343static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006344{
6345 int status;
6346 struct nfs4_secinfo_arg args = {
6347 .dir_fh = NFS_FH(dir),
6348 .name = name,
6349 };
6350 struct nfs4_secinfo_res res = {
6351 .flavors = flavors,
6352 };
6353 struct rpc_message msg = {
6354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6355 .rpc_argp = &args,
6356 .rpc_resp = &res,
6357 };
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006358 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006359 struct rpc_cred *cred = NULL;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006360
6361 if (use_integrity) {
6362 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006363 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6364 msg.rpc_cred = cred;
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006365 }
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006366
6367 dprintk("NFS call secinfo %s\n", name->name);
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006368
6369 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6370 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6371
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006372 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6373 &res.seq_res, 0);
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006374 dprintk("NFS reply secinfo: %d\n", status);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006375
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04006376 if (cred)
6377 put_rpccred(cred);
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006378
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006379 return status;
6380}
6381
Bryan Schumaker72de53e2012-04-27 13:27:40 -04006382int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6383 struct nfs4_secinfo_flavors *flavors)
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006384{
6385 struct nfs4_exception exception = { };
6386 int err;
6387 do {
Weston Andros Adamsona5250de2013-09-03 15:18:49 -04006388 err = -NFS4ERR_WRONGSEC;
6389
6390 /* try to use integrity protection with machine cred */
6391 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6392 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6393
6394 /*
6395 * if unable to use integrity protection, or SECINFO with
6396 * integrity protection returns NFS4ERR_WRONGSEC (which is
6397 * disallowed by spec, but exists in deployed servers) use
6398 * the current filesystem's rpc_client and the user cred.
6399 */
6400 if (err == -NFS4ERR_WRONGSEC)
6401 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6402
Trond Myklebust078ea3d2013-08-12 16:45:55 -04006403 trace_nfs4_secinfo(dir, name, err);
6404 err = nfs4_handle_exception(NFS_SERVER(dir), err,
Bryan Schumaker5a5ea0d2011-03-24 17:12:29 +00006405 &exception);
6406 } while (exception.retry);
6407 return err;
6408}
6409
Andy Adamson557134a2009-04-01 09:21:53 -04006410#ifdef CONFIG_NFS_V4_1
Benny Halevy99fe60d2009-04-01 09:22:29 -04006411/*
Andy Adamson357f54d2010-12-14 10:11:57 -05006412 * Check the exchange flags returned by the server for invalid flags, having
6413 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6414 * DS flags set.
6415 */
6416static int nfs4_check_cl_exchange_flags(u32 flags)
6417{
6418 if (flags & ~EXCHGID4_FLAG_MASK_R)
6419 goto out_inval;
6420 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6421 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6422 goto out_inval;
6423 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6424 goto out_inval;
6425 return NFS_OK;
6426out_inval:
6427 return -NFS4ERR_INVAL;
6428}
6429
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006430static bool
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006431nfs41_same_server_scope(struct nfs41_server_scope *a,
6432 struct nfs41_server_scope *b)
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006433{
6434 if (a->server_scope_sz == b->server_scope_sz &&
6435 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6436 return true;
6437
6438 return false;
6439}
6440
Andy Adamson357f54d2010-12-14 10:11:57 -05006441/*
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006442 * nfs4_proc_bind_conn_to_session()
6443 *
6444 * The 4.1 client currently uses the same TCP connection for the
6445 * fore and backchannel.
6446 */
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006447int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006448{
6449 int status;
6450 struct nfs41_bind_conn_to_session_res res;
6451 struct rpc_message msg = {
6452 .rpc_proc =
6453 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6454 .rpc_argp = clp,
6455 .rpc_resp = &res,
Trond Myklebust2cf047c2012-05-25 17:57:41 -04006456 .rpc_cred = cred,
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006457 };
6458
6459 dprintk("--> %s\n", __func__);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006460
6461 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6462 if (unlikely(res.session == NULL)) {
6463 status = -ENOMEM;
6464 goto out;
6465 }
6466
6467 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006468 trace_nfs4_bind_conn_to_session(clp, status);
Weston Andros Adamson7c44f1ae2012-05-24 13:22:50 -04006469 if (status == 0) {
6470 if (memcmp(res.session->sess_id.data,
6471 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6472 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6473 status = -EIO;
6474 goto out_session;
6475 }
6476 if (res.dir != NFS4_CDFS4_BOTH) {
6477 dprintk("NFS: %s: Unexpected direction from server\n",
6478 __func__);
6479 status = -EIO;
6480 goto out_session;
6481 }
6482 if (res.use_conn_in_rdma_mode) {
6483 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6484 __func__);
6485 status = -EIO;
6486 goto out_session;
6487 }
6488 }
6489out_session:
6490 kfree(res.session);
6491out:
6492 dprintk("<-- %s status= %d\n", __func__, status);
6493 return status;
6494}
6495
6496/*
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006497 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6498 * and operations we'd like to see to enable certain features in the allow map
Benny Halevy99fe60d2009-04-01 09:22:29 -04006499 */
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006500static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6501 .how = SP4_MACH_CRED,
6502 .enforce.u.words = {
6503 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6504 1 << (OP_EXCHANGE_ID - 32) |
6505 1 << (OP_CREATE_SESSION - 32) |
6506 1 << (OP_DESTROY_SESSION - 32) |
6507 1 << (OP_DESTROY_CLIENTID - 32)
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006508 },
6509 .allow.u.words = {
6510 [0] = 1 << (OP_CLOSE) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006511 1 << (OP_LOCKU) |
6512 1 << (OP_COMMIT),
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006513 [1] = 1 << (OP_SECINFO - 32) |
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006514 1 << (OP_SECINFO_NO_NAME - 32) |
6515 1 << (OP_TEST_STATEID - 32) |
Weston Andros Adamsona0279622013-09-10 18:44:30 -04006516 1 << (OP_FREE_STATEID - 32) |
6517 1 << (OP_WRITE - 32)
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006518 }
6519};
6520
6521/*
6522 * Select the state protection mode for client `clp' given the server results
6523 * from exchange_id in `sp'.
6524 *
6525 * Returns 0 on success, negative errno otherwise.
6526 */
6527static int nfs4_sp4_select_mode(struct nfs_client *clp,
6528 struct nfs41_state_protection *sp)
6529{
6530 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6531 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6532 1 << (OP_EXCHANGE_ID - 32) |
6533 1 << (OP_CREATE_SESSION - 32) |
6534 1 << (OP_DESTROY_SESSION - 32) |
6535 1 << (OP_DESTROY_CLIENTID - 32)
6536 };
6537 unsigned int i;
6538
6539 if (sp->how == SP4_MACH_CRED) {
6540 /* Print state protect result */
6541 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6542 for (i = 0; i <= LAST_NFS4_OP; i++) {
6543 if (test_bit(i, sp->enforce.u.longs))
6544 dfprintk(MOUNT, " enforce op %d\n", i);
6545 if (test_bit(i, sp->allow.u.longs))
6546 dfprintk(MOUNT, " allow op %d\n", i);
6547 }
6548
6549 /* make sure nothing is on enforce list that isn't supported */
6550 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6551 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6552 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6553 return -EINVAL;
6554 }
6555 }
6556
6557 /*
6558 * Minimal mode - state operations are allowed to use machine
6559 * credential. Note this already happens by default, so the
6560 * client doesn't have to do anything more than the negotiation.
6561 *
6562 * NOTE: we don't care if EXCHANGE_ID is in the list -
6563 * we're already using the machine cred for exchange_id
6564 * and will never use a different cred.
6565 */
6566 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6567 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6568 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6569 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6570 dfprintk(MOUNT, "sp4_mach_cred:\n");
6571 dfprintk(MOUNT, " minimal mode enabled\n");
6572 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6573 } else {
6574 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6575 return -EINVAL;
6576 }
Weston Andros Adamsonfa940722013-08-13 16:37:34 -04006577
6578 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6579 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6580 dfprintk(MOUNT, " cleanup mode enabled\n");
6581 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6582 }
Weston Andros Adamson8b5bee22013-08-13 16:37:35 -04006583
6584 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6585 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6586 dfprintk(MOUNT, " secinfo mode enabled\n");
6587 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6588 }
Weston Andros Adamson3787d502013-08-13 16:37:36 -04006589
6590 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6591 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6592 dfprintk(MOUNT, " stateid mode enabled\n");
6593 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6594 }
Weston Andros Adamson8c21c622013-08-13 16:37:37 -04006595
6596 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6597 dfprintk(MOUNT, " write mode enabled\n");
6598 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6599 }
6600
6601 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6602 dfprintk(MOUNT, " commit mode enabled\n");
6603 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6604 }
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006605 }
6606
6607 return 0;
6608}
6609
6610/*
6611 * _nfs4_proc_exchange_id()
6612 *
6613 * Wrapper for EXCHANGE_ID operation.
6614 */
6615static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6616 u32 sp4_how)
Benny Halevy99fe60d2009-04-01 09:22:29 -04006617{
6618 nfs4_verifier verifier;
6619 struct nfs41_exchange_id_args args = {
Chuck Levercd937102012-03-02 17:14:31 -05006620 .verifier = &verifier,
Benny Halevy99fe60d2009-04-01 09:22:29 -04006621 .client = clp,
Chuck Levercd3fade2013-10-17 14:14:04 -04006622#ifdef CONFIG_NFS_V4_1_MIGRATION
Trond Myklebust4f0b4292013-05-20 12:24:03 -04006623 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
Chuck Levercd3fade2013-10-17 14:14:04 -04006624 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6625 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6626#else
6627 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6628 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6629#endif
Benny Halevy99fe60d2009-04-01 09:22:29 -04006630 };
6631 struct nfs41_exchange_id_res res = {
Trond Myklebust32b01312012-05-26 13:41:04 -04006632 0
Benny Halevy99fe60d2009-04-01 09:22:29 -04006633 };
6634 int status;
6635 struct rpc_message msg = {
6636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6637 .rpc_argp = &args,
6638 .rpc_resp = &res,
6639 .rpc_cred = cred,
6640 };
Benny Halevy99fe60d2009-04-01 09:22:29 -04006641
Chuck Leverf0920752012-05-21 22:45:41 -04006642 nfs4_init_boot_verifier(clp, &verifier);
Chuck Levere984a552012-09-14 17:24:21 -04006643 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6644 sizeof(args.id));
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006645 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6646 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6647 args.id_len, args.id);
Benny Halevy99fe60d2009-04-01 09:22:29 -04006648
Chuck Leveracdeb692012-05-21 22:46:16 -04006649 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006650 GFP_NOFS);
Chuck Leveracdeb692012-05-21 22:46:16 -04006651 if (unlikely(res.server_owner == NULL)) {
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006652 status = -ENOMEM;
6653 goto out;
6654 }
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006655
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006656 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006657 GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04006658 if (unlikely(res.server_scope == NULL)) {
Benny Halevy99fe60d2009-04-01 09:22:29 -04006659 status = -ENOMEM;
Chuck Leveracdeb692012-05-21 22:46:16 -04006660 goto out_server_owner;
Benny Halevy99fe60d2009-04-01 09:22:29 -04006661 }
6662
Trond Myklebustbbafffd2012-05-24 16:31:39 -04006663 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
Chuck Lever177313f2012-05-21 22:44:58 -04006664 if (unlikely(res.impl_id == NULL)) {
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006665 status = -ENOMEM;
6666 goto out_server_scope;
6667 }
6668
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006669 switch (sp4_how) {
6670 case SP4_NONE:
6671 args.state_protect.how = SP4_NONE;
6672 break;
6673
6674 case SP4_MACH_CRED:
6675 args.state_protect = nfs4_sp4_mach_cred_request;
6676 break;
6677
6678 default:
6679 /* unsupported! */
6680 WARN_ON_ONCE(1);
6681 status = -EINVAL;
6682 goto out_server_scope;
6683 }
6684
Trond Myklebust1bd714f2011-04-24 14:29:33 -04006685 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006686 trace_nfs4_exchange_id(clp, status);
Chuck Lever177313f2012-05-21 22:44:58 -04006687 if (status == 0)
Trond Myklebust32b01312012-05-26 13:41:04 -04006688 status = nfs4_check_cl_exchange_flags(res.flags);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006689
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006690 if (status == 0)
6691 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6692
Chuck Lever177313f2012-05-21 22:44:58 -04006693 if (status == 0) {
Trond Myklebust32b01312012-05-26 13:41:04 -04006694 clp->cl_clientid = res.clientid;
6695 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6696 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6697 clp->cl_seqid = res.seqid;
6698
Chuck Leveracdeb692012-05-21 22:46:16 -04006699 kfree(clp->cl_serverowner);
6700 clp->cl_serverowner = res.server_owner;
6701 res.server_owner = NULL;
Chuck Leveracdeb692012-05-21 22:46:16 -04006702
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006703 /* use the most recent implementation id */
Chuck Lever59155542012-05-21 22:44:41 -04006704 kfree(clp->cl_implid);
6705 clp->cl_implid = res.impl_id;
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006706
Chuck Lever177313f2012-05-21 22:44:58 -04006707 if (clp->cl_serverscope != NULL &&
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006708 !nfs41_same_server_scope(clp->cl_serverscope,
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006709 res.server_scope)) {
6710 dprintk("%s: server_scope mismatch detected\n",
6711 __func__);
6712 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006713 kfree(clp->cl_serverscope);
6714 clp->cl_serverscope = NULL;
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -04006715 }
6716
Chuck Lever177313f2012-05-21 22:44:58 -04006717 if (clp->cl_serverscope == NULL) {
Chuck Lever79d4e1f2012-05-21 22:44:31 -04006718 clp->cl_serverscope = res.server_scope;
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006719 goto out;
6720 }
Trond Myklebust32b01312012-05-26 13:41:04 -04006721 } else
6722 kfree(res.impl_id);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006723
Chuck Leveracdeb692012-05-21 22:46:16 -04006724out_server_owner:
6725 kfree(res.server_owner);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006726out_server_scope:
Weston Andros Adamsonabe9a6d2012-02-16 11:17:05 -05006727 kfree(res.server_scope);
6728out:
Chuck Lever177313f2012-05-21 22:44:58 -04006729 if (clp->cl_implid != NULL)
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006730 dprintk("NFS reply exchange_id: Server Implementation ID: "
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -05006731 "domain: %s, name: %s, date: %llu,%u\n",
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006732 clp->cl_implid->domain, clp->cl_implid->name,
Chuck Lever59155542012-05-21 22:44:41 -04006733 clp->cl_implid->date.seconds,
6734 clp->cl_implid->date.nseconds);
Chuck Lever6bbb4ae2012-07-11 16:30:59 -04006735 dprintk("NFS reply exchange_id: %d\n", status);
Benny Halevy99fe60d2009-04-01 09:22:29 -04006736 return status;
6737}
6738
Weston Andros Adamson2031cd12013-08-13 16:37:32 -04006739/*
6740 * nfs4_proc_exchange_id()
6741 *
6742 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6743 *
6744 * Since the clientid has expired, all compounds using sessions
6745 * associated with the stale clientid will be returning
6746 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6747 * be in some phase of session reset.
6748 *
6749 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6750 */
6751int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6752{
6753 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6754 int status;
6755
6756 /* try SP4_MACH_CRED if krb5i/p */
6757 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6758 authflavor == RPC_AUTH_GSS_KRB5P) {
6759 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6760 if (!status)
6761 return 0;
6762 }
6763
6764 /* try SP4_NONE */
6765 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6766}
6767
Trond Myklebust66245532012-05-25 17:18:09 -04006768static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6769 struct rpc_cred *cred)
6770{
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6773 .rpc_argp = clp,
6774 .rpc_cred = cred,
6775 };
6776 int status;
6777
6778 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04006779 trace_nfs4_destroy_clientid(clp, status);
Trond Myklebust66245532012-05-25 17:18:09 -04006780 if (status)
Trond Myklebust02c67522012-06-07 13:45:53 -04006781 dprintk("NFS: Got error %d from the server %s on "
Trond Myklebust66245532012-05-25 17:18:09 -04006782 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6783 return status;
6784}
6785
6786static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6787 struct rpc_cred *cred)
6788{
6789 unsigned int loop;
6790 int ret;
6791
6792 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6793 ret = _nfs4_proc_destroy_clientid(clp, cred);
6794 switch (ret) {
6795 case -NFS4ERR_DELAY:
6796 case -NFS4ERR_CLIENTID_BUSY:
6797 ssleep(1);
6798 break;
6799 default:
6800 return ret;
6801 }
6802 }
6803 return 0;
6804}
6805
6806int nfs4_destroy_clientid(struct nfs_client *clp)
6807{
6808 struct rpc_cred *cred;
6809 int ret = 0;
6810
6811 if (clp->cl_mvops->minor_version < 1)
6812 goto out;
6813 if (clp->cl_exchange_flags == 0)
6814 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -04006815 if (clp->cl_preserve_clid)
6816 goto out;
Chuck Lever73d8bde2013-07-24 12:28:37 -04006817 cred = nfs4_get_clid_cred(clp);
Trond Myklebust66245532012-05-25 17:18:09 -04006818 ret = nfs4_proc_destroy_clientid(clp, cred);
6819 if (cred)
6820 put_rpccred(cred);
6821 switch (ret) {
6822 case 0:
6823 case -NFS4ERR_STALE_CLIENTID:
6824 clp->cl_exchange_flags = 0;
6825 }
6826out:
6827 return ret;
6828}
6829
Andy Adamson2050f0c2009-04-01 09:22:30 -04006830struct nfs4_get_lease_time_data {
6831 struct nfs4_get_lease_time_args *args;
6832 struct nfs4_get_lease_time_res *res;
6833 struct nfs_client *clp;
6834};
6835
6836static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6837 void *calldata)
6838{
Andy Adamson2050f0c2009-04-01 09:22:30 -04006839 struct nfs4_get_lease_time_data *data =
6840 (struct nfs4_get_lease_time_data *)calldata;
6841
6842 dprintk("--> %s\n", __func__);
6843 /* just setup sequence, do not trigger session recovery
6844 since we're invoked within one */
Trond Myklebustd9afbd12012-10-22 20:28:44 -04006845 nfs41_setup_sequence(data->clp->cl_session,
6846 &data->args->la_seq_args,
6847 &data->res->lr_seq_res,
6848 task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04006849 dprintk("<-- %s\n", __func__);
6850}
6851
6852/*
6853 * Called from nfs4_state_manager thread for session setup, so don't recover
6854 * from sequence operation or clientid errors.
6855 */
6856static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6857{
6858 struct nfs4_get_lease_time_data *data =
6859 (struct nfs4_get_lease_time_data *)calldata;
6860
6861 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04006862 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6863 return;
Andy Adamson2050f0c2009-04-01 09:22:30 -04006864 switch (task->tk_status) {
6865 case -NFS4ERR_DELAY:
6866 case -NFS4ERR_GRACE:
6867 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6868 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6869 task->tk_status = 0;
Andy Adamsona8a4ae32011-05-03 13:43:03 -04006870 /* fall through */
6871 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustd00c5d42011-10-19 12:17:29 -07006872 rpc_restart_call_prepare(task);
Andy Adamson2050f0c2009-04-01 09:22:30 -04006873 return;
6874 }
Andy Adamson2050f0c2009-04-01 09:22:30 -04006875 dprintk("<-- %s\n", __func__);
6876}
6877
Trond Myklebust17280172012-03-11 13:11:00 -04006878static const struct rpc_call_ops nfs4_get_lease_time_ops = {
Andy Adamson2050f0c2009-04-01 09:22:30 -04006879 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6880 .rpc_call_done = nfs4_get_lease_time_done,
6881};
6882
6883int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6884{
6885 struct rpc_task *task;
6886 struct nfs4_get_lease_time_args args;
6887 struct nfs4_get_lease_time_res res = {
6888 .lr_fsinfo = fsinfo,
6889 };
6890 struct nfs4_get_lease_time_data data = {
6891 .args = &args,
6892 .res = &res,
6893 .clp = clp,
6894 };
6895 struct rpc_message msg = {
6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6897 .rpc_argp = &args,
6898 .rpc_resp = &res,
6899 };
6900 struct rpc_task_setup task_setup = {
6901 .rpc_client = clp->cl_rpcclient,
6902 .rpc_message = &msg,
6903 .callback_ops = &nfs4_get_lease_time_ops,
Trond Myklebust1bd714f2011-04-24 14:29:33 -04006904 .callback_data = &data,
6905 .flags = RPC_TASK_TIMEOUT,
Andy Adamson2050f0c2009-04-01 09:22:30 -04006906 };
6907 int status;
6908
Chuck Levera9c92d62013-08-09 12:48:18 -04006909 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04006910 nfs4_set_sequence_privileged(&args.la_seq_args);
Andy Adamson2050f0c2009-04-01 09:22:30 -04006911 dprintk("--> %s\n", __func__);
6912 task = rpc_run_task(&task_setup);
6913
6914 if (IS_ERR(task))
6915 status = PTR_ERR(task);
6916 else {
6917 status = task->tk_status;
6918 rpc_put_task(task);
6919 }
6920 dprintk("<-- %s return %d\n", __func__, status);
6921
6922 return status;
6923}
6924
Andy Adamsonfc931582009-04-01 09:22:31 -04006925/*
6926 * Initialize the values to be used by the client in CREATE_SESSION
6927 * If nfs4_init_session set the fore channel request and response sizes,
6928 * use them.
6929 *
6930 * Set the back channel max_resp_sz_cached to zero to force the client to
6931 * always set csa_cachethis to FALSE because the current implementation
6932 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6933 */
6934static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6935{
Andy Adamson18aad3d2013-06-26 12:21:49 -04006936 unsigned int max_rqst_sz, max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04006937
Andy Adamson18aad3d2013-06-26 12:21:49 -04006938 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6939 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
6940
Andy Adamsonfc931582009-04-01 09:22:31 -04006941 /* Fore channel attributes */
Andy Adamson18aad3d2013-06-26 12:21:49 -04006942 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6943 args->fc_attrs.max_resp_sz = max_resp_sz;
Andy Adamsonfc931582009-04-01 09:22:31 -04006944 args->fc_attrs.max_ops = NFS4_MAX_OPS;
Trond Myklebustef159e92012-02-06 19:50:40 -05006945 args->fc_attrs.max_reqs = max_session_slots;
Andy Adamsonfc931582009-04-01 09:22:31 -04006946
6947 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
Mike Sager8e0d46e2009-12-17 12:06:26 -05006948 "max_ops=%u max_reqs=%u\n",
Andy Adamsonfc931582009-04-01 09:22:31 -04006949 __func__,
6950 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
Mike Sager8e0d46e2009-12-17 12:06:26 -05006951 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
Andy Adamsonfc931582009-04-01 09:22:31 -04006952
6953 /* Back channel attributes */
Andy Adamsonfc931582009-04-01 09:22:31 -04006954 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6955 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6956 args->bc_attrs.max_resp_sz_cached = 0;
6957 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6958 args->bc_attrs.max_reqs = 1;
6959
6960 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6961 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6962 __func__,
6963 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6964 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6965 args->bc_attrs.max_reqs);
6966}
6967
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006968static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
Andy Adamson8d353012009-04-01 09:22:32 -04006969{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006970 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6971 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6972
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006973 if (rcvd->max_resp_sz > sent->max_resp_sz)
6974 return -EINVAL;
6975 /*
6976 * Our requested max_ops is the minimum we need; we're not
6977 * prepared to break up compounds into smaller pieces than that.
6978 * So, no point even trying to continue if the server won't
6979 * cooperate:
6980 */
6981 if (rcvd->max_ops < sent->max_ops)
6982 return -EINVAL;
6983 if (rcvd->max_reqs == 0)
6984 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04006985 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6986 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006987 return 0;
Andy Adamson8d353012009-04-01 09:22:32 -04006988}
6989
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006990static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6991{
6992 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6993 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
Andy Adamson8d353012009-04-01 09:22:32 -04006994
J. Bruce Fields43c2e882010-10-02 15:19:01 -04006995 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6996 return -EINVAL;
6997 if (rcvd->max_resp_sz < sent->max_resp_sz)
6998 return -EINVAL;
6999 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7000 return -EINVAL;
7001 /* These would render the backchannel useless: */
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007002 if (rcvd->max_ops != sent->max_ops)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007003 return -EINVAL;
Vitaliy Gusevb4b9a0c2012-02-15 19:38:25 +04007004 if (rcvd->max_reqs != sent->max_reqs)
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007005 return -EINVAL;
7006 return 0;
7007}
Andy Adamson8d353012009-04-01 09:22:32 -04007008
Andy Adamson8d353012009-04-01 09:22:32 -04007009static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7010 struct nfs4_session *session)
7011{
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007012 int ret;
Andy Adamson8d353012009-04-01 09:22:32 -04007013
J. Bruce Fields43c2e882010-10-02 15:19:01 -04007014 ret = nfs4_verify_fore_channel_attrs(args, session);
7015 if (ret)
7016 return ret;
7017 return nfs4_verify_back_channel_attrs(args, session);
Andy Adamson8d353012009-04-01 09:22:32 -04007018}
7019
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007020static int _nfs4_proc_create_session(struct nfs_client *clp,
7021 struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007022{
7023 struct nfs4_session *session = clp->cl_session;
7024 struct nfs41_create_session_args args = {
7025 .client = clp,
7026 .cb_program = NFS4_CALLBACK,
7027 };
7028 struct nfs41_create_session_res res = {
7029 .client = clp,
7030 };
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7033 .rpc_argp = &args,
7034 .rpc_resp = &res,
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007035 .rpc_cred = cred,
Andy Adamsonfc931582009-04-01 09:22:31 -04007036 };
7037 int status;
7038
7039 nfs4_init_channel_attrs(&args);
Andy Adamson0f914212009-04-01 09:23:16 -04007040 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
Andy Adamsonfc931582009-04-01 09:22:31 -04007041
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007042 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007043 trace_nfs4_create_session(clp, status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007044
Trond Myklebust43095d32012-11-20 11:13:12 -05007045 if (!status) {
Andy Adamson8d353012009-04-01 09:22:32 -04007046 /* Verify the session's negotiated channel_attrs values */
7047 status = nfs4_verify_channel_attrs(&args, session);
Andy Adamsonfc931582009-04-01 09:22:31 -04007048 /* Increment the clientid slot sequence id */
7049 clp->cl_seqid++;
7050 }
7051
7052 return status;
7053}
7054
7055/*
7056 * Issues a CREATE_SESSION operation to the server.
7057 * It is the responsibility of the caller to verify the session is
7058 * expired before calling this routine.
7059 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007060int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
Andy Adamsonfc931582009-04-01 09:22:31 -04007061{
7062 int status;
7063 unsigned *ptr;
Andy Adamsonfc931582009-04-01 09:22:31 -04007064 struct nfs4_session *session = clp->cl_session;
7065
7066 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7067
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007068 status = _nfs4_proc_create_session(clp, cred);
Andy Adamsonfc931582009-04-01 09:22:31 -04007069 if (status)
7070 goto out;
7071
Andy Adamsonaacd5532011-11-09 13:58:21 -05007072 /* Init or reset the session slot tables */
7073 status = nfs4_setup_session_slot_tables(session);
7074 dprintk("slot table setup returned %d\n", status);
Andy Adamsonfc931582009-04-01 09:22:31 -04007075 if (status)
7076 goto out;
7077
7078 ptr = (unsigned *)&session->sess_id.data[0];
7079 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7080 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
Andy Adamsonfc931582009-04-01 09:22:31 -04007081out:
7082 dprintk("<-- %s\n", __func__);
7083 return status;
7084}
7085
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007086/*
7087 * Issue the over-the-wire RPC DESTROY_SESSION.
7088 * The caller must serialize access to this routine.
7089 */
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007090int nfs4_proc_destroy_session(struct nfs4_session *session,
7091 struct rpc_cred *cred)
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007092{
Trond Myklebust848f5bd2012-05-25 17:51:23 -04007093 struct rpc_message msg = {
7094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7095 .rpc_argp = session,
7096 .rpc_cred = cred,
7097 };
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007098 int status = 0;
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007099
7100 dprintk("--> nfs4_proc_destroy_session\n");
7101
7102 /* session is still being setup */
7103 if (session->clp->cl_cons_state != NFS_CS_READY)
7104 return status;
7105
Trond Myklebust1bd714f2011-04-24 14:29:33 -04007106 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007107 trace_nfs4_destroy_session(session->clp, status);
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007108
7109 if (status)
Trond Myklebust08106ac2012-06-05 10:08:24 -04007110 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
Andy Adamson0f3e66c2009-04-01 09:22:34 -04007111 "Session has been destroyed regardless...\n", status);
7112
7113 dprintk("<-- nfs4_proc_destroy_session\n");
7114 return status;
7115}
7116
Trond Myklebust7b38c362012-05-23 13:23:31 -04007117/*
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007118 * Renew the cl_session lease.
7119 */
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007120struct nfs4_sequence_data {
7121 struct nfs_client *clp;
7122 struct nfs4_sequence_args args;
7123 struct nfs4_sequence_res res;
7124};
7125
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007126static void nfs41_sequence_release(void *data)
7127{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007128 struct nfs4_sequence_data *calldata = data;
7129 struct nfs_client *clp = calldata->clp;
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007130
Alexandros Batsakis71358402010-02-05 03:45:05 -08007131 if (atomic_read(&clp->cl_count) > 1)
7132 nfs4_schedule_state_renewal(clp);
7133 nfs_put_client(clp);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007134 kfree(calldata);
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007135}
7136
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007137static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7138{
7139 switch(task->tk_status) {
7140 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007141 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7142 return -EAGAIN;
7143 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007144 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007145 }
7146 return 0;
7147}
7148
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007149static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007150{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007151 struct nfs4_sequence_data *calldata = data;
7152 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007153
Trond Myklebust14516c32010-07-31 14:29:06 -04007154 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7155 return;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007156
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007157 trace_nfs4_sequence(clp, task->tk_status);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007158 if (task->tk_status < 0) {
7159 dprintk("%s ERROR %d\n", __func__, task->tk_status);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007160 if (atomic_read(&clp->cl_count) == 1)
7161 goto out;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007162
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007163 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7164 rpc_restart_call_prepare(task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007165 return;
7166 }
7167 }
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007168 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
Alexandros Batsakis71358402010-02-05 03:45:05 -08007169out:
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007170 dprintk("<-- %s\n", __func__);
7171}
7172
7173static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7174{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007175 struct nfs4_sequence_data *calldata = data;
7176 struct nfs_client *clp = calldata->clp;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007177 struct nfs4_sequence_args *args;
7178 struct nfs4_sequence_res *res;
7179
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007180 args = task->tk_msg.rpc_argp;
7181 res = task->tk_msg.rpc_resp;
7182
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007183 nfs41_setup_sequence(clp->cl_session, args, res, task);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007184}
7185
7186static const struct rpc_call_ops nfs41_sequence_ops = {
7187 .rpc_call_done = nfs41_sequence_call_done,
7188 .rpc_call_prepare = nfs41_sequence_prepare,
Alexandros Batsakisdc96aef2010-02-05 03:45:04 -08007189 .rpc_release = nfs41_sequence_release,
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007190};
7191
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007192static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7193 struct rpc_cred *cred,
7194 bool is_privileged)
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007195{
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007196 struct nfs4_sequence_data *calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007197 struct rpc_message msg = {
7198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7199 .rpc_cred = cred,
7200 };
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007201 struct rpc_task_setup task_setup_data = {
7202 .rpc_client = clp->cl_rpcclient,
7203 .rpc_message = &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007204 .callback_ops = &nfs41_sequence_ops,
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04007205 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007206 };
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007207
Alexandros Batsakis71358402010-02-05 03:45:05 -08007208 if (!atomic_inc_not_zero(&clp->cl_count))
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007209 return ERR_PTR(-EIO);
Benny Halevydfb4f3092010-09-24 09:17:01 -04007210 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007211 if (calldata == NULL) {
Alexandros Batsakis71358402010-02-05 03:45:05 -08007212 nfs_put_client(clp);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007213 return ERR_PTR(-ENOMEM);
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007214 }
Chuck Levera9c92d62013-08-09 12:48:18 -04007215 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007216 if (is_privileged)
7217 nfs4_set_sequence_privileged(&calldata->args);
Trond Myklebustd5f8d3f2010-06-16 09:52:25 -04007218 msg.rpc_argp = &calldata->args;
7219 msg.rpc_resp = &calldata->res;
7220 calldata->clp = clp;
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007221 task_setup_data.callback_data = calldata;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007222
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007223 return rpc_run_task(&task_setup_data);
7224}
7225
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007226static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007227{
7228 struct rpc_task *task;
7229 int ret = 0;
7230
Trond Myklebust2f60ea62011-08-24 15:07:37 -04007231 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7232 return 0;
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007233 task = _nfs41_proc_sequence(clp, cred, false);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007234 if (IS_ERR(task))
7235 ret = PTR_ERR(task);
7236 else
Trond Myklebustbf294b42011-02-21 11:05:41 -08007237 rpc_put_task_async(task);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007238 dprintk("<-- %s status=%d\n", __func__, ret);
7239 return ret;
7240}
7241
7242static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7243{
7244 struct rpc_task *task;
7245 int ret;
7246
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007247 task = _nfs41_proc_sequence(clp, cred, true);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007248 if (IS_ERR(task)) {
7249 ret = PTR_ERR(task);
7250 goto out;
7251 }
7252 ret = rpc_wait_for_completion_task(task);
Trond Myklebustb4410c22011-03-09 16:00:55 -05007253 if (!ret) {
7254 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7255
7256 if (task->tk_status == 0)
7257 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007258 ret = task->tk_status;
Trond Myklebustb4410c22011-03-09 16:00:55 -05007259 }
Trond Myklebust71ac6da2010-06-16 09:52:26 -04007260 rpc_put_task(task);
7261out:
7262 dprintk("<-- %s status=%d\n", __func__, ret);
7263 return ret;
Andy Adamsonfc01cea2009-04-01 09:22:36 -04007264}
7265
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007266struct nfs4_reclaim_complete_data {
7267 struct nfs_client *clp;
7268 struct nfs41_reclaim_complete_args arg;
7269 struct nfs41_reclaim_complete_res res;
7270};
7271
7272static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7273{
7274 struct nfs4_reclaim_complete_data *calldata = data;
7275
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007276 nfs41_setup_sequence(calldata->clp->cl_session,
7277 &calldata->arg.seq_args,
7278 &calldata->res.seq_res,
7279 task);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007280}
7281
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007282static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7283{
7284 switch(task->tk_status) {
7285 case 0:
7286 case -NFS4ERR_COMPLETE_ALREADY:
7287 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7288 break;
7289 case -NFS4ERR_DELAY:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007290 rpc_delay(task, NFS4_POLL_RETRY_MAX);
Andy Adamsona8a4ae32011-05-03 13:43:03 -04007291 /* fall through */
7292 case -NFS4ERR_RETRY_UNCACHED_REP:
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007293 return -EAGAIN;
7294 default:
Trond Myklebust0400a6b2011-03-09 16:00:53 -05007295 nfs4_schedule_lease_recovery(clp);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007296 }
7297 return 0;
7298}
7299
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007300static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7301{
7302 struct nfs4_reclaim_complete_data *calldata = data;
7303 struct nfs_client *clp = calldata->clp;
7304 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7305
7306 dprintk("--> %s\n", __func__);
Trond Myklebust14516c32010-07-31 14:29:06 -04007307 if (!nfs41_sequence_done(task, res))
7308 return;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007309
Trond Myklebustc6d01c62013-08-09 11:51:26 -04007310 trace_nfs4_reclaim_complete(clp, task->tk_status);
Trond Myklebustaa5190d2010-06-16 09:52:25 -04007311 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7312 rpc_restart_call_prepare(task);
7313 return;
7314 }
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007315 dprintk("<-- %s\n", __func__);
7316}
7317
7318static void nfs4_free_reclaim_complete_data(void *data)
7319{
7320 struct nfs4_reclaim_complete_data *calldata = data;
7321
7322 kfree(calldata);
7323}
7324
7325static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7326 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7327 .rpc_call_done = nfs4_reclaim_complete_done,
7328 .rpc_release = nfs4_free_reclaim_complete_data,
7329};
7330
7331/*
7332 * Issue a global reclaim complete.
7333 */
Trond Myklebust965e9c22013-05-20 11:05:17 -04007334static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7335 struct rpc_cred *cred)
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007336{
7337 struct nfs4_reclaim_complete_data *calldata;
7338 struct rpc_task *task;
7339 struct rpc_message msg = {
7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
Trond Myklebust965e9c22013-05-20 11:05:17 -04007341 .rpc_cred = cred,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007342 };
7343 struct rpc_task_setup task_setup_data = {
7344 .rpc_client = clp->cl_rpcclient,
7345 .rpc_message = &msg,
7346 .callback_ops = &nfs4_reclaim_complete_call_ops,
7347 .flags = RPC_TASK_ASYNC,
7348 };
7349 int status = -ENOMEM;
7350
7351 dprintk("--> %s\n", __func__);
Trond Myklebust8535b2b2010-05-13 12:51:01 -04007352 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007353 if (calldata == NULL)
7354 goto out;
7355 calldata->clp = clp;
7356 calldata->arg.one_fs = 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007357
Chuck Levera9c92d62013-08-09 12:48:18 -04007358 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04007359 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007360 msg.rpc_argp = &calldata->arg;
7361 msg.rpc_resp = &calldata->res;
7362 task_setup_data.callback_data = calldata;
7363 task = rpc_run_task(&task_setup_data);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007364 if (IS_ERR(task)) {
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007365 status = PTR_ERR(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007366 goto out;
7367 }
Andy Adamsonc34c32e2011-03-09 13:13:46 -05007368 status = nfs4_wait_for_completion_rpc_task(task);
7369 if (status == 0)
7370 status = task->tk_status;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007371 rpc_put_task(task);
Dan Carpenteracf82b82010-04-22 11:28:39 +02007372 return 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05007373out:
7374 dprintk("<-- %s status=%d\n", __func__, status);
7375 return status;
7376}
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007377
7378static void
7379nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7380{
7381 struct nfs4_layoutget *lgp = calldata;
Fred Isamanc31663d2011-01-06 11:36:24 +00007382 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007383 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007384
7385 dprintk("--> %s\n", __func__);
Fred Isamanc31663d2011-01-06 11:36:24 +00007386 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7387 * right now covering the LAYOUTGET we are about to send.
7388 * However, that is not so catastrophic, and there seems
7389 * to be no way to prevent it completely.
7390 */
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007391 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
Trond Myklebust9d12b212012-01-17 22:04:25 -05007392 &lgp->res.seq_res, task))
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007393 return;
Fred Isamancf7d63f2011-01-06 11:36:25 +00007394 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7395 NFS_I(lgp->args.inode)->layout,
7396 lgp->args.ctx->state)) {
7397 rpc_exit(task, NFS4_OK);
Fred Isamancf7d63f2011-01-06 11:36:25 +00007398 }
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007399}
7400
7401static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7402{
7403 struct nfs4_layoutget *lgp = calldata;
Trond Myklebustee314c22012-10-01 17:25:48 -07007404 struct inode *inode = lgp->args.inode;
7405 struct nfs_server *server = NFS_SERVER(inode);
7406 struct pnfs_layout_hdr *lo;
7407 struct nfs4_state *state = NULL;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007408 unsigned long timeo, now, giveup;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007409
Boaz Harroshed7e5422014-01-22 20:34:54 +02007410 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007411
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007412 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
Trond Myklebustee314c22012-10-01 17:25:48 -07007413 goto out;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007414
7415 switch (task->tk_status) {
7416 case 0:
Trond Myklebustee314c22012-10-01 17:25:48 -07007417 goto out;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007418 /*
7419 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7420 * (or clients) writing to the same RAID stripe
7421 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007422 case -NFS4ERR_LAYOUTTRYLATER:
Boaz Harroshed7e5422014-01-22 20:34:54 +02007423 /*
7424 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7425 * existing layout before getting a new one).
7426 */
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007427 case -NFS4ERR_RECALLCONFLICT:
Weston Andros Adamson30005122013-02-28 20:30:10 -05007428 timeo = rpc_get_timeout(task->tk_client);
7429 giveup = lgp->args.timestamp + timeo;
Boaz Harroshed7e5422014-01-22 20:34:54 +02007430 now = jiffies;
7431 if (time_after(giveup, now)) {
7432 unsigned long delay;
7433
7434 /* Delay for:
7435 * - Not less then NFS4_POLL_RETRY_MIN.
7436 * - One last time a jiffie before we give up
7437 * - exponential backoff (time_now minus start_attempt)
7438 */
7439 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7440 min((giveup - now - 1),
7441 now - lgp->args.timestamp));
7442
7443 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7444 __func__, delay);
7445 rpc_delay(task, delay);
7446 task->tk_status = 0;
7447 rpc_restart_call_prepare(task);
7448 goto out; /* Do not call nfs4_async_handle_error() */
7449 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007450 break;
7451 case -NFS4ERR_EXPIRED:
7452 case -NFS4ERR_BAD_STATEID:
7453 spin_lock(&inode->i_lock);
7454 lo = NFS_I(inode)->layout;
7455 if (!lo || list_empty(&lo->plh_segs)) {
7456 spin_unlock(&inode->i_lock);
7457 /* If the open stateid was bad, then recover it. */
7458 state = lgp->args.ctx->state;
7459 } else {
7460 LIST_HEAD(head);
7461
7462 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7463 spin_unlock(&inode->i_lock);
7464 /* Mark the bad layout state as invalid, then
7465 * retry using the open stateid. */
7466 pnfs_free_lseg_list(&head);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007467 }
7468 }
Trond Myklebustee314c22012-10-01 17:25:48 -07007469 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7470 rpc_restart_call_prepare(task);
7471out:
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007472 dprintk("<-- %s\n", __func__);
7473}
7474
Idan Kedar85541162012-08-02 11:47:10 +03007475static size_t max_response_pages(struct nfs_server *server)
7476{
7477 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7478 return nfs_page_array_len(0, max_resp_sz);
7479}
7480
7481static void nfs4_free_pages(struct page **pages, size_t size)
7482{
7483 int i;
7484
7485 if (!pages)
7486 return;
7487
7488 for (i = 0; i < size; i++) {
7489 if (!pages[i])
7490 break;
7491 __free_page(pages[i]);
7492 }
7493 kfree(pages);
7494}
7495
7496static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7497{
7498 struct page **pages;
7499 int i;
7500
7501 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7502 if (!pages) {
7503 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7504 return NULL;
7505 }
7506
7507 for (i = 0; i < size; i++) {
7508 pages[i] = alloc_page(gfp_flags);
7509 if (!pages[i]) {
7510 dprintk("%s: failed to allocate page\n", __func__);
7511 nfs4_free_pages(pages, size);
7512 return NULL;
7513 }
7514 }
7515
7516 return pages;
7517}
7518
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007519static void nfs4_layoutget_release(void *calldata)
7520{
7521 struct nfs4_layoutget *lgp = calldata;
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007522 struct inode *inode = lgp->args.inode;
7523 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007524 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007525
7526 dprintk("--> %s\n", __func__);
Idan Kedar85541162012-08-02 11:47:10 +03007527 nfs4_free_pages(lgp->args.layout.pages, max_pages);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007528 pnfs_put_layout_hdr(NFS_I(inode)->layout);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007529 put_nfs_open_context(lgp->args.ctx);
7530 kfree(calldata);
7531 dprintk("<-- %s\n", __func__);
7532}
7533
7534static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7535 .rpc_call_prepare = nfs4_layoutget_prepare,
7536 .rpc_call_done = nfs4_layoutget_done,
7537 .rpc_release = nfs4_layoutget_release,
7538};
7539
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007540struct pnfs_layout_segment *
7541nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007542{
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007543 struct inode *inode = lgp->args.inode;
7544 struct nfs_server *server = NFS_SERVER(inode);
Idan Kedar85541162012-08-02 11:47:10 +03007545 size_t max_pages = max_response_pages(server);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007546 struct rpc_task *task;
7547 struct rpc_message msg = {
7548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7549 .rpc_argp = &lgp->args,
7550 .rpc_resp = &lgp->res,
Trond Myklebust6ab59342013-05-20 10:49:34 -04007551 .rpc_cred = lgp->cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007552 };
7553 struct rpc_task_setup task_setup_data = {
7554 .rpc_client = server->client,
7555 .rpc_message = &msg,
7556 .callback_ops = &nfs4_layoutget_call_ops,
7557 .callback_data = lgp,
7558 .flags = RPC_TASK_ASYNC,
7559 };
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007560 struct pnfs_layout_segment *lseg = NULL;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007561 int status = 0;
7562
7563 dprintk("--> %s\n", __func__);
7564
Idan Kedar85541162012-08-02 11:47:10 +03007565 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7566 if (!lgp->args.layout.pages) {
7567 nfs4_layoutget_release(lgp);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007568 return ERR_PTR(-ENOMEM);
Idan Kedar85541162012-08-02 11:47:10 +03007569 }
7570 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
Weston Andros Adamson30005122013-02-28 20:30:10 -05007571 lgp->args.timestamp = jiffies;
Idan Kedar85541162012-08-02 11:47:10 +03007572
Weston Andros Adamson35124a02011-03-24 16:48:21 -04007573 lgp->res.layoutp = &lgp->args.layout;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007574 lgp->res.seq_res.sr_slot = NULL;
Chuck Levera9c92d62013-08-09 12:48:18 -04007575 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
Weston Andros Adamsona47970f2013-02-25 21:27:33 -05007576
7577 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7578 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7579
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007580 task = rpc_run_task(&task_setup_data);
7581 if (IS_ERR(task))
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007582 return ERR_CAST(task);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007583 status = nfs4_wait_for_completion_rpc_task(task);
Fred Isamanc31663d2011-01-06 11:36:24 +00007584 if (status == 0)
7585 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007586 trace_nfs4_layoutget(lgp->args.ctx,
7587 &lgp->args.range,
7588 &lgp->res.range,
7589 status);
Weston Andros Adamson085b7a42013-02-15 16:03:46 -05007590 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7591 if (status == 0 && lgp->res.layoutp->len)
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007592 lseg = pnfs_layout_process(lgp);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007593 rpc_put_task(task);
7594 dprintk("<-- %s status=%d\n", __func__, status);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -04007595 if (status)
7596 return ERR_PTR(status);
7597 return lseg;
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007598}
7599
Benny Halevycbe82602011-05-22 19:52:37 +03007600static void
7601nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7602{
7603 struct nfs4_layoutreturn *lrp = calldata;
7604
7605 dprintk("--> %s\n", __func__);
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007606 nfs41_setup_sequence(lrp->clp->cl_session,
7607 &lrp->args.seq_args,
7608 &lrp->res.seq_res,
7609 task);
Benny Halevycbe82602011-05-22 19:52:37 +03007610}
7611
7612static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7613{
7614 struct nfs4_layoutreturn *lrp = calldata;
7615 struct nfs_server *server;
7616
7617 dprintk("--> %s\n", __func__);
7618
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007619 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
Benny Halevycbe82602011-05-22 19:52:37 +03007620 return;
7621
7622 server = NFS_SERVER(lrp->args.inode);
Trond Myklebustf22e5ed2013-12-04 12:09:45 -05007623 switch (task->tk_status) {
7624 default:
7625 task->tk_status = 0;
7626 case 0:
7627 break;
7628 case -NFS4ERR_DELAY:
7629 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7630 break;
Trond Myklebustd00c5d42011-10-19 12:17:29 -07007631 rpc_restart_call_prepare(task);
Benny Halevycbe82602011-05-22 19:52:37 +03007632 return;
7633 }
Benny Halevycbe82602011-05-22 19:52:37 +03007634 dprintk("<-- %s\n", __func__);
7635}
7636
7637static void nfs4_layoutreturn_release(void *calldata)
7638{
7639 struct nfs4_layoutreturn *lrp = calldata;
Trond Myklebust849b2862012-09-24 14:18:39 -04007640 struct pnfs_layout_hdr *lo = lrp->args.layout;
Benny Halevycbe82602011-05-22 19:52:37 +03007641
7642 dprintk("--> %s\n", __func__);
Trond Myklebust849b2862012-09-24 14:18:39 -04007643 spin_lock(&lo->plh_inode->i_lock);
7644 if (lrp->res.lrs_present)
7645 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7646 lo->plh_block_lgets--;
7647 spin_unlock(&lo->plh_inode->i_lock);
Trond Myklebust70c3bd22012-09-18 20:51:13 -04007648 pnfs_put_layout_hdr(lrp->args.layout);
Benny Halevycbe82602011-05-22 19:52:37 +03007649 kfree(calldata);
7650 dprintk("<-- %s\n", __func__);
7651}
7652
7653static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7654 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7655 .rpc_call_done = nfs4_layoutreturn_done,
7656 .rpc_release = nfs4_layoutreturn_release,
7657};
7658
7659int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7660{
7661 struct rpc_task *task;
7662 struct rpc_message msg = {
7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7664 .rpc_argp = &lrp->args,
7665 .rpc_resp = &lrp->res,
Trond Myklebust95560002013-05-20 10:43:47 -04007666 .rpc_cred = lrp->cred,
Benny Halevycbe82602011-05-22 19:52:37 +03007667 };
7668 struct rpc_task_setup task_setup_data = {
Andy Adamson1771c572013-07-22 12:42:05 -04007669 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
Benny Halevycbe82602011-05-22 19:52:37 +03007670 .rpc_message = &msg,
7671 .callback_ops = &nfs4_layoutreturn_call_ops,
7672 .callback_data = lrp,
7673 };
7674 int status;
7675
7676 dprintk("--> %s\n", __func__);
Chuck Levera9c92d62013-08-09 12:48:18 -04007677 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
Benny Halevycbe82602011-05-22 19:52:37 +03007678 task = rpc_run_task(&task_setup_data);
7679 if (IS_ERR(task))
7680 return PTR_ERR(task);
7681 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007682 trace_nfs4_layoutreturn(lrp->args.inode, status);
Benny Halevycbe82602011-05-22 19:52:37 +03007683 dprintk("<-- %s status=%d\n", __func__, status);
7684 rpc_put_task(task);
7685 return status;
7686}
7687
Andy Adamson7f11d8d2011-07-30 20:52:35 -04007688/*
7689 * Retrieve the list of Data Server devices from the MDS.
7690 */
7691static int _nfs4_getdevicelist(struct nfs_server *server,
7692 const struct nfs_fh *fh,
7693 struct pnfs_devicelist *devlist)
7694{
7695 struct nfs4_getdevicelist_args args = {
7696 .fh = fh,
7697 .layoutclass = server->pnfs_curr_ld->id,
7698 };
7699 struct nfs4_getdevicelist_res res = {
7700 .devlist = devlist,
7701 };
7702 struct rpc_message msg = {
7703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7704 .rpc_argp = &args,
7705 .rpc_resp = &res,
7706 };
7707 int status;
7708
7709 dprintk("--> %s\n", __func__);
7710 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7711 &res.seq_res, 0);
7712 dprintk("<-- %s status=%d\n", __func__, status);
7713 return status;
7714}
7715
7716int nfs4_proc_getdevicelist(struct nfs_server *server,
7717 const struct nfs_fh *fh,
7718 struct pnfs_devicelist *devlist)
7719{
7720 struct nfs4_exception exception = { };
7721 int err;
7722
7723 do {
7724 err = nfs4_handle_exception(server,
7725 _nfs4_getdevicelist(server, fh, devlist),
7726 &exception);
7727 } while (exception.retry);
7728
7729 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7730 err, devlist->num_devs);
7731
7732 return err;
7733}
7734EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7735
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007736static int
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007737_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7738 struct pnfs_device *pdev,
7739 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007740{
7741 struct nfs4_getdeviceinfo_args args = {
7742 .pdev = pdev,
7743 };
7744 struct nfs4_getdeviceinfo_res res = {
7745 .pdev = pdev,
7746 };
7747 struct rpc_message msg = {
7748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7749 .rpc_argp = &args,
7750 .rpc_resp = &res,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007751 .rpc_cred = cred,
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007752 };
7753 int status;
7754
7755 dprintk("--> %s\n", __func__);
Bryan Schumaker7c513052011-03-24 17:12:24 +00007756 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007757 dprintk("<-- %s status=%d\n", __func__, status);
7758
7759 return status;
7760}
7761
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007762int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7763 struct pnfs_device *pdev,
7764 struct rpc_cred *cred)
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007765{
7766 struct nfs4_exception exception = { };
7767 int err;
7768
7769 do {
7770 err = nfs4_handle_exception(server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -04007771 _nfs4_proc_getdeviceinfo(server, pdev, cred),
Andy Adamsonb1f69b72010-10-20 00:18:03 -04007772 &exception);
7773 } while (exception.retry);
7774 return err;
7775}
7776EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7777
Andy Adamson863a3c62011-03-23 13:27:54 +00007778static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7779{
7780 struct nfs4_layoutcommit_data *data = calldata;
7781 struct nfs_server *server = NFS_SERVER(data->args.inode);
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007782 struct nfs4_session *session = nfs4_get_session(server);
Andy Adamson863a3c62011-03-23 13:27:54 +00007783
Trond Myklebustd9afbd12012-10-22 20:28:44 -04007784 nfs41_setup_sequence(session,
7785 &data->args.seq_args,
7786 &data->res.seq_res,
7787 task);
Andy Adamson863a3c62011-03-23 13:27:54 +00007788}
7789
7790static void
7791nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7792{
7793 struct nfs4_layoutcommit_data *data = calldata;
7794 struct nfs_server *server = NFS_SERVER(data->args.inode);
7795
Trond Myklebust6ba7db32012-10-22 20:07:20 -04007796 if (!nfs41_sequence_done(task, &data->res.seq_res))
Andy Adamson863a3c62011-03-23 13:27:54 +00007797 return;
7798
7799 switch (task->tk_status) { /* Just ignore these failures */
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007800 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7801 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7802 case -NFS4ERR_BADLAYOUT: /* no layout */
7803 case -NFS4ERR_GRACE: /* loca_recalim always false */
Andy Adamson863a3c62011-03-23 13:27:54 +00007804 task->tk_status = 0;
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007805 case 0:
Trond Myklebuste59d27e2012-03-27 18:22:19 -04007806 break;
7807 default:
7808 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7809 rpc_restart_call_prepare(task);
7810 return;
7811 }
7812 }
Andy Adamson863a3c62011-03-23 13:27:54 +00007813}
7814
7815static void nfs4_layoutcommit_release(void *calldata)
7816{
7817 struct nfs4_layoutcommit_data *data = calldata;
7818
Andy Adamsondb29c082011-07-30 20:52:38 -04007819 pnfs_cleanup_layoutcommit(data);
Trond Myklebustd8c951c2014-01-13 12:08:11 -05007820 nfs_post_op_update_inode_force_wcc(data->args.inode,
7821 data->res.fattr);
Andy Adamson863a3c62011-03-23 13:27:54 +00007822 put_rpccred(data->cred);
7823 kfree(data);
7824}
7825
7826static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7827 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7828 .rpc_call_done = nfs4_layoutcommit_done,
7829 .rpc_release = nfs4_layoutcommit_release,
7830};
7831
7832int
Andy Adamsonef311532011-03-12 02:58:10 -05007833nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +00007834{
7835 struct rpc_message msg = {
7836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7837 .rpc_argp = &data->args,
7838 .rpc_resp = &data->res,
7839 .rpc_cred = data->cred,
7840 };
7841 struct rpc_task_setup task_setup_data = {
7842 .task = &data->task,
7843 .rpc_client = NFS_CLIENT(data->args.inode),
7844 .rpc_message = &msg,
7845 .callback_ops = &nfs4_layoutcommit_ops,
7846 .callback_data = data,
7847 .flags = RPC_TASK_ASYNC,
7848 };
7849 struct rpc_task *task;
7850 int status = 0;
7851
7852 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7853 "lbw: %llu inode %lu\n",
7854 data->task.tk_pid, sync,
7855 data->args.lastbytewritten,
7856 data->args.inode->i_ino);
7857
Chuck Levera9c92d62013-08-09 12:48:18 -04007858 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
Andy Adamson863a3c62011-03-23 13:27:54 +00007859 task = rpc_run_task(&task_setup_data);
7860 if (IS_ERR(task))
7861 return PTR_ERR(task);
Andy Adamsonef311532011-03-12 02:58:10 -05007862 if (sync == false)
Andy Adamson863a3c62011-03-23 13:27:54 +00007863 goto out;
7864 status = nfs4_wait_for_completion_rpc_task(task);
7865 if (status != 0)
7866 goto out;
7867 status = task->tk_status;
Trond Myklebust1037e6e2013-08-14 16:36:51 -04007868 trace_nfs4_layoutcommit(data->args.inode, status);
Andy Adamson863a3c62011-03-23 13:27:54 +00007869out:
7870 dprintk("%s: status %d\n", __func__, status);
7871 rpc_put_task(task);
7872 return status;
7873}
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007874
Andy Adamson97431202013-08-08 10:57:56 -04007875/**
7876 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7877 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7878 */
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007879static int
7880_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007881 struct nfs_fsinfo *info,
7882 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007883{
7884 struct nfs41_secinfo_no_name_args args = {
7885 .style = SECINFO_STYLE_CURRENT_FH,
7886 };
7887 struct nfs4_secinfo_res res = {
7888 .flavors = flavors,
7889 };
7890 struct rpc_message msg = {
7891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7892 .rpc_argp = &args,
7893 .rpc_resp = &res,
7894 };
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007895 struct rpc_clnt *clnt = server->client;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04007896 struct rpc_cred *cred = NULL;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007897 int status;
7898
7899 if (use_integrity) {
7900 clnt = server->nfs_client->cl_rpcclient;
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04007901 cred = nfs4_get_clid_cred(server->nfs_client);
7902 msg.rpc_cred = cred;
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007903 }
7904
7905 dprintk("--> %s\n", __func__);
7906 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7907 &res.seq_res, 0);
7908 dprintk("<-- %s status=%d\n", __func__, status);
7909
Weston Andros Adamson7cb852d2013-09-10 18:44:31 -04007910 if (cred)
7911 put_rpccred(cred);
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007912
7913 return status;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007914}
7915
7916static int
7917nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7918 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7919{
7920 struct nfs4_exception exception = { };
7921 int err;
7922 do {
Weston Andros Adamsonb1b3e132013-09-04 12:13:19 -04007923 /* first try using integrity protection */
7924 err = -NFS4ERR_WRONGSEC;
7925
7926 /* try to use integrity protection with machine cred */
7927 if (_nfs4_is_integrity_protected(server->nfs_client))
7928 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7929 flavors, true);
7930
7931 /*
7932 * if unable to use integrity protection, or SECINFO with
7933 * integrity protection returns NFS4ERR_WRONGSEC (which is
7934 * disallowed by spec, but exists in deployed servers) use
7935 * the current filesystem's rpc_client and the user cred.
7936 */
7937 if (err == -NFS4ERR_WRONGSEC)
7938 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7939 flavors, false);
7940
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007941 switch (err) {
7942 case 0:
7943 case -NFS4ERR_WRONGSEC:
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05007944 case -ENOTSUPP:
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04007945 goto out;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007946 default:
7947 err = nfs4_handle_exception(server, err, &exception);
7948 }
7949 } while (exception.retry);
Trond Myklebust05e9cfb2012-03-27 18:13:02 -04007950out:
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007951 return err;
7952}
7953
7954static int
7955nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7956 struct nfs_fsinfo *info)
7957{
7958 int err;
7959 struct page *page;
Anna Schumaker367156d2013-09-25 17:02:48 -04007960 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007961 struct nfs4_secinfo_flavors *flavors;
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04007962 struct nfs4_secinfo4 *secinfo;
7963 int i;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007964
7965 page = alloc_page(GFP_KERNEL);
7966 if (!page) {
7967 err = -ENOMEM;
7968 goto out;
7969 }
7970
7971 flavors = page_address(page);
7972 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7973
7974 /*
7975 * Fall back on "guess and check" method if
7976 * the server doesn't support SECINFO_NO_NAME
7977 */
Weston Andros Adamson78b19ba2014-01-13 16:54:45 -05007978 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
Bryan Schumakerfca78d62011-06-02 14:59:07 -04007979 err = nfs4_find_root_sec(server, fhandle, info);
7980 goto out_freepage;
7981 }
7982 if (err)
7983 goto out_freepage;
7984
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04007985 for (i = 0; i < flavors->num_flavors; i++) {
7986 secinfo = &flavors->flavors[i];
7987
7988 switch (secinfo->flavor) {
7989 case RPC_AUTH_NULL:
7990 case RPC_AUTH_UNIX:
7991 case RPC_AUTH_GSS:
7992 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7993 &secinfo->flavor_info);
7994 break;
7995 default:
7996 flavor = RPC_AUTH_MAXFLAVOR;
7997 break;
7998 }
7999
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04008000 if (!nfs_auth_info_match(&server->auth_info, flavor))
8001 flavor = RPC_AUTH_MAXFLAVOR;
8002
Weston Andros Adamson58a8cf12013-09-24 13:58:02 -04008003 if (flavor != RPC_AUTH_MAXFLAVOR) {
8004 err = nfs4_lookup_root_sec(server, fhandle,
8005 info, flavor);
8006 if (!err)
8007 break;
8008 }
8009 }
8010
8011 if (flavor == RPC_AUTH_MAXFLAVOR)
8012 err = -EPERM;
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008013
8014out_freepage:
8015 put_page(page);
8016 if (err == -EACCES)
8017 return -EPERM;
8018out:
8019 return err;
8020}
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008021
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008022static int _nfs41_test_stateid(struct nfs_server *server,
8023 nfs4_stateid *stateid,
8024 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008025{
8026 int status;
8027 struct nfs41_test_stateid_args args = {
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008028 .stateid = stateid,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008029 };
8030 struct nfs41_test_stateid_res res;
8031 struct rpc_message msg = {
8032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8033 .rpc_argp = &args,
8034 .rpc_resp = &res,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008035 .rpc_cred = cred,
Bryan Schumaker7d974792011-06-02 14:59:08 -04008036 };
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008037 struct rpc_clnt *rpc_client = server->client;
8038
8039 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8040 &rpc_client, &msg);
Bryan Schumaker1cab0652012-01-31 10:39:29 -05008041
Chuck Lever38527b12012-07-11 16:30:23 -04008042 dprintk("NFS call test_stateid %p\n", stateid);
Chuck Levera9c92d62013-08-09 12:48:18 -04008043 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008044 nfs4_set_sequence_privileged(&args.seq_args);
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008045 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
Trond Myklebust8fe72ba2012-10-29 19:02:20 -04008046 &args.seq_args, &res.seq_res);
Chuck Lever38527b12012-07-11 16:30:23 -04008047 if (status != NFS_OK) {
8048 dprintk("NFS reply test_stateid: failed, %d\n", status);
Chuck Lever377e5072012-07-11 16:29:45 -04008049 return status;
Chuck Lever38527b12012-07-11 16:30:23 -04008050 }
8051 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
Chuck Lever377e5072012-07-11 16:29:45 -04008052 return -res.status;
Bryan Schumaker7d974792011-06-02 14:59:08 -04008053}
8054
Chuck Lever38527b12012-07-11 16:30:23 -04008055/**
8056 * nfs41_test_stateid - perform a TEST_STATEID operation
8057 *
8058 * @server: server / transport on which to perform the operation
8059 * @stateid: state ID to test
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008060 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008061 *
8062 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8063 * Otherwise a negative NFS4ERR value is returned if the operation
8064 * failed or the state ID is not currently valid.
8065 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008066static int nfs41_test_stateid(struct nfs_server *server,
8067 nfs4_stateid *stateid,
8068 struct rpc_cred *cred)
Bryan Schumaker7d974792011-06-02 14:59:08 -04008069{
8070 struct nfs4_exception exception = { };
8071 int err;
8072 do {
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008073 err = _nfs41_test_stateid(server, stateid, cred);
Chuck Lever377e5072012-07-11 16:29:45 -04008074 if (err != -NFS4ERR_DELAY)
8075 break;
8076 nfs4_handle_exception(server, err, &exception);
Bryan Schumaker7d974792011-06-02 14:59:08 -04008077 } while (exception.retry);
8078 return err;
8079}
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008080
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008081struct nfs_free_stateid_data {
8082 struct nfs_server *server;
8083 struct nfs41_free_stateid_args args;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008084 struct nfs41_free_stateid_res res;
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008085};
8086
8087static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8088{
8089 struct nfs_free_stateid_data *data = calldata;
8090 nfs41_setup_sequence(nfs4_get_session(data->server),
8091 &data->args.seq_args,
8092 &data->res.seq_res,
8093 task);
8094}
8095
8096static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8097{
8098 struct nfs_free_stateid_data *data = calldata;
8099
8100 nfs41_sequence_done(task, &data->res.seq_res);
8101
8102 switch (task->tk_status) {
8103 case -NFS4ERR_DELAY:
8104 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8105 rpc_restart_call_prepare(task);
8106 }
8107}
8108
8109static void nfs41_free_stateid_release(void *calldata)
8110{
8111 kfree(calldata);
8112}
8113
Trond Myklebust17f26b12013-08-21 15:48:42 -04008114static const struct rpc_call_ops nfs41_free_stateid_ops = {
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008115 .rpc_call_prepare = nfs41_free_stateid_prepare,
8116 .rpc_call_done = nfs41_free_stateid_done,
8117 .rpc_release = nfs41_free_stateid_release,
8118};
8119
8120static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8121 nfs4_stateid *stateid,
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008122 struct rpc_cred *cred,
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008123 bool privileged)
8124{
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008125 struct rpc_message msg = {
8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008127 .rpc_cred = cred,
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008128 };
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008129 struct rpc_task_setup task_setup = {
8130 .rpc_client = server->client,
8131 .rpc_message = &msg,
8132 .callback_ops = &nfs41_free_stateid_ops,
8133 .flags = RPC_TASK_ASYNC,
8134 };
8135 struct nfs_free_stateid_data *data;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008136
Weston Andros Adamson3787d502013-08-13 16:37:36 -04008137 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8138 &task_setup.rpc_client, &msg);
8139
Chuck Lever38527b12012-07-11 16:30:23 -04008140 dprintk("NFS call free_stateid %p\n", stateid);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008141 data = kmalloc(sizeof(*data), GFP_NOFS);
8142 if (!data)
8143 return ERR_PTR(-ENOMEM);
8144 data->server = server;
8145 nfs4_stateid_copy(&data->args.stateid, stateid);
8146
8147 task_setup.callback_data = data;
8148
8149 msg.rpc_argp = &data->args;
8150 msg.rpc_resp = &data->res;
Chuck Levera9c92d62013-08-09 12:48:18 -04008151 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008152 if (privileged)
8153 nfs4_set_sequence_privileged(&data->args.seq_args);
8154
8155 return rpc_run_task(&task_setup);
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008156}
8157
Chuck Lever38527b12012-07-11 16:30:23 -04008158/**
8159 * nfs41_free_stateid - perform a FREE_STATEID operation
8160 *
8161 * @server: server / transport on which to perform the operation
8162 * @stateid: state ID to release
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008163 * @cred: credential
Chuck Lever38527b12012-07-11 16:30:23 -04008164 *
8165 * Returns NFS_OK if the server freed "stateid". Otherwise a
8166 * negative NFS4ERR value is returned.
8167 */
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008168static int nfs41_free_stateid(struct nfs_server *server,
8169 nfs4_stateid *stateid,
8170 struct rpc_cred *cred)
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008171{
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008172 struct rpc_task *task;
8173 int ret;
8174
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008175 task = _nfs41_free_stateid(server, stateid, cred, true);
Trond Myklebust7c1d5fa2013-05-03 14:40:01 -04008176 if (IS_ERR(task))
8177 return PTR_ERR(task);
8178 ret = rpc_wait_for_completion_task(task);
8179 if (!ret)
8180 ret = task->tk_status;
8181 rpc_put_task(task);
8182 return ret;
Bryan Schumaker9aeda352011-06-02 14:59:09 -04008183}
Trond Myklebust36281ca2012-03-04 18:13:56 -05008184
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008185static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8186{
8187 struct rpc_task *task;
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008188 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008189
Trond Myklebustab7cb0d2013-05-20 11:20:27 -04008190 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008191 nfs4_free_lock_state(server, lsp);
8192 if (IS_ERR(task))
8193 return PTR_ERR(task);
8194 rpc_put_task(task);
8195 return 0;
8196}
8197
Trond Myklebust36281ca2012-03-04 18:13:56 -05008198static bool nfs41_match_stateid(const nfs4_stateid *s1,
8199 const nfs4_stateid *s2)
8200{
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008201 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008202 return false;
8203
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008204 if (s1->seqid == s2->seqid)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008205 return true;
Trond Myklebust2d2f24a2012-03-04 18:13:57 -05008206 if (s1->seqid == 0 || s2->seqid == 0)
Trond Myklebust36281ca2012-03-04 18:13:56 -05008207 return true;
8208
8209 return false;
8210}
8211
Andy Adamson557134a2009-04-01 09:21:53 -04008212#endif /* CONFIG_NFS_V4_1 */
8213
Trond Myklebust36281ca2012-03-04 18:13:56 -05008214static bool nfs4_match_stateid(const nfs4_stateid *s1,
8215 const nfs4_stateid *s2)
8216{
Trond Myklebustf597c532012-03-04 18:13:56 -05008217 return nfs4_stateid_match(s1, s2);
Trond Myklebust36281ca2012-03-04 18:13:56 -05008218}
8219
8220
Trond Myklebust17280172012-03-11 13:11:00 -04008221static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008222 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008223 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008224 .recover_open = nfs4_open_reclaim,
8225 .recover_lock = nfs4_lock_reclaim,
Andy Adamson591d71c2009-04-01 09:22:47 -04008226 .establish_clid = nfs4_init_clientid,
Chuck Lever05f4c352012-09-14 17:24:32 -04008227 .detect_trunking = nfs40_discover_server_trunking,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008228};
8229
Andy Adamson591d71c2009-04-01 09:22:47 -04008230#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008231static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008232 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8233 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8234 .recover_open = nfs4_open_reclaim,
8235 .recover_lock = nfs4_lock_reclaim,
Andy Adamson4d643d12009-12-04 15:52:24 -05008236 .establish_clid = nfs41_init_clientid,
Ricardo Labiagafce5c832009-12-05 16:08:41 -05008237 .reclaim_complete = nfs41_proc_reclaim_complete,
Chuck Lever05f4c352012-09-14 17:24:32 -04008238 .detect_trunking = nfs41_discover_server_trunking,
Andy Adamson591d71c2009-04-01 09:22:47 -04008239};
8240#endif /* CONFIG_NFS_V4_1 */
8241
Trond Myklebust17280172012-03-11 13:11:00 -04008242static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
Trond Myklebust7eff03a2008-12-23 15:21:43 -05008243 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
Trond Myklebustb79a4a12008-12-23 15:21:41 -05008244 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008245 .recover_open = nfs4_open_expired,
8246 .recover_lock = nfs4_lock_expired,
Andy Adamson591d71c2009-04-01 09:22:47 -04008247 .establish_clid = nfs4_init_clientid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008248};
8249
Andy Adamson591d71c2009-04-01 09:22:47 -04008250#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008251static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
Andy Adamson591d71c2009-04-01 09:22:47 -04008252 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8253 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
Bryan Schumakerf062eb62011-06-02 14:59:10 -04008254 .recover_open = nfs41_open_expired,
8255 .recover_lock = nfs41_lock_expired,
Andy Adamson4d643d12009-12-04 15:52:24 -05008256 .establish_clid = nfs41_init_clientid,
Andy Adamson591d71c2009-04-01 09:22:47 -04008257};
8258#endif /* CONFIG_NFS_V4_1 */
8259
Trond Myklebust17280172012-03-11 13:11:00 -04008260static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008261 .sched_state_renewal = nfs4_proc_async_renew,
Andy Adamsona7b72102009-04-01 09:22:46 -04008262 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008263 .renew_lease = nfs4_proc_renew,
Benny Halevy29fba382009-04-01 09:22:44 -04008264};
8265
8266#if defined(CONFIG_NFS_V4_1)
Trond Myklebust17280172012-03-11 13:11:00 -04008267static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
Benny Halevy29fba382009-04-01 09:22:44 -04008268 .sched_state_renewal = nfs41_proc_async_sequence,
Andy Adamsona7b72102009-04-01 09:22:46 -04008269 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
Benny Halevy8e69514f2009-04-01 09:22:45 -04008270 .renew_lease = nfs4_proc_sequence,
Benny Halevy29fba382009-04-01 09:22:44 -04008271};
8272#endif
8273
Chuck Leverec011fe2013-10-17 14:12:39 -04008274static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008275 .get_locations = _nfs40_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008276 .fsid_present = _nfs40_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008277};
8278
8279#if defined(CONFIG_NFS_V4_1)
8280static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
Chuck Leverb03d7352013-10-17 14:12:50 -04008281 .get_locations = _nfs41_proc_get_locations,
Chuck Lever44c99932013-10-17 14:13:30 -04008282 .fsid_present = _nfs41_proc_fsid_present,
Chuck Leverec011fe2013-10-17 14:12:39 -04008283};
8284#endif /* CONFIG_NFS_V4_1 */
8285
Trond Myklebust97dc1352010-06-16 09:52:26 -04008286static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8287 .minor_version = 0,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008288 .init_caps = NFS_CAP_READDIRPLUS
8289 | NFS_CAP_ATOMIC_OPEN
8290 | NFS_CAP_CHANGE_ATTR
8291 | NFS_CAP_POSIX_LOCK,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008292 .init_client = nfs40_init_client,
8293 .shutdown_client = nfs40_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008294 .match_stateid = nfs4_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008295 .find_root_sec = nfs4_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008296 .free_lock_state = nfs4_release_lockowner,
Chuck Lever9915ea72013-08-09 12:48:27 -04008297 .call_sync_ops = &nfs40_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008298 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8299 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8300 .state_renewal_ops = &nfs40_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008301 .mig_recovery_ops = &nfs40_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008302};
8303
8304#if defined(CONFIG_NFS_V4_1)
8305static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8306 .minor_version = 1,
Trond Myklebust39c6daa2013-03-15 16:11:57 -04008307 .init_caps = NFS_CAP_READDIRPLUS
8308 | NFS_CAP_ATOMIC_OPEN
8309 | NFS_CAP_CHANGE_ATTR
Trond Myklebust3b664862013-03-17 15:31:15 -04008310 | NFS_CAP_POSIX_LOCK
Trond Myklebust49f9a0f2013-03-15 16:44:28 -04008311 | NFS_CAP_STATEID_NFSV41
8312 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008313 .init_client = nfs41_init_client,
8314 .shutdown_client = nfs41_shutdown_client,
Trond Myklebust36281ca2012-03-04 18:13:56 -05008315 .match_stateid = nfs41_match_stateid,
Bryan Schumakerfca78d62011-06-02 14:59:07 -04008316 .find_root_sec = nfs41_find_root_sec,
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -04008317 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008318 .call_sync_ops = &nfs41_call_sync_ops,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04008319 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8320 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8321 .state_renewal_ops = &nfs41_state_renewal_ops,
Chuck Leverec011fe2013-10-17 14:12:39 -04008322 .mig_recovery_ops = &nfs41_mig_recovery_ops,
Trond Myklebust97dc1352010-06-16 09:52:26 -04008323};
8324#endif
8325
Steve Dickson42c2c422013-05-22 12:50:38 -04008326#if defined(CONFIG_NFS_V4_2)
8327static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8328 .minor_version = 2,
Bryan Schumaker70173102013-06-19 13:41:43 -04008329 .init_caps = NFS_CAP_READDIRPLUS
8330 | NFS_CAP_ATOMIC_OPEN
8331 | NFS_CAP_CHANGE_ATTR
8332 | NFS_CAP_POSIX_LOCK
8333 | NFS_CAP_STATEID_NFSV41
8334 | NFS_CAP_ATOMIC_OPEN_V1,
Chuck Leverabf79bb2013-08-09 12:49:11 -04008335 .init_client = nfs41_init_client,
8336 .shutdown_client = nfs41_shutdown_client,
Steve Dickson42c2c422013-05-22 12:50:38 -04008337 .match_stateid = nfs41_match_stateid,
8338 .find_root_sec = nfs41_find_root_sec,
Bryan Schumaker70173102013-06-19 13:41:43 -04008339 .free_lock_state = nfs41_free_lock_state,
Chuck Lever9915ea72013-08-09 12:48:27 -04008340 .call_sync_ops = &nfs41_call_sync_ops,
Steve Dickson42c2c422013-05-22 12:50:38 -04008341 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8342 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8343 .state_renewal_ops = &nfs41_state_renewal_ops,
8344};
8345#endif
8346
Trond Myklebust97dc1352010-06-16 09:52:26 -04008347const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8348 [0] = &nfs_v4_0_minor_ops,
8349#if defined(CONFIG_NFS_V4_1)
8350 [1] = &nfs_v4_1_minor_ops,
8351#endif
Steve Dickson42c2c422013-05-22 12:50:38 -04008352#if defined(CONFIG_NFS_V4_2)
8353 [2] = &nfs_v4_2_minor_ops,
8354#endif
Trond Myklebust97dc1352010-06-16 09:52:26 -04008355};
8356
Trond Myklebust17f26b12013-08-21 15:48:42 -04008357static const struct inode_operations nfs4_dir_inode_operations = {
Bryan Schumaker73a79702012-07-16 16:39:12 -04008358 .create = nfs_create,
8359 .lookup = nfs_lookup,
8360 .atomic_open = nfs_atomic_open,
8361 .link = nfs_link,
8362 .unlink = nfs_unlink,
8363 .symlink = nfs_symlink,
8364 .mkdir = nfs_mkdir,
8365 .rmdir = nfs_rmdir,
8366 .mknod = nfs_mknod,
8367 .rename = nfs_rename,
8368 .permission = nfs_permission,
8369 .getattr = nfs_getattr,
8370 .setattr = nfs_setattr,
8371 .getxattr = generic_getxattr,
8372 .setxattr = generic_setxattr,
8373 .listxattr = generic_listxattr,
8374 .removexattr = generic_removexattr,
8375};
8376
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08008377static const struct inode_operations nfs4_file_inode_operations = {
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008378 .permission = nfs_permission,
8379 .getattr = nfs_getattr,
8380 .setattr = nfs_setattr,
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008381 .getxattr = generic_getxattr,
8382 .setxattr = generic_setxattr,
8383 .listxattr = generic_listxattr,
8384 .removexattr = generic_removexattr,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008385};
8386
David Howells509de812006-08-22 20:06:11 -04008387const struct nfs_rpc_ops nfs_v4_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07008388 .version = 4, /* protocol version */
8389 .dentry_ops = &nfs4_dentry_operations,
8390 .dir_inode_ops = &nfs4_dir_inode_operations,
J. Bruce Fields6b3b5492005-06-22 17:16:22 +00008391 .file_inode_ops = &nfs4_file_inode_operations,
Jeff Layton1788ea62011-11-04 13:31:21 -04008392 .file_ops = &nfs4_file_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008393 .getroot = nfs4_proc_get_root,
Bryan Schumaker281cad42012-04-27 13:27:45 -04008394 .submount = nfs4_submount,
Bryan Schumakerff9099f22012-07-30 16:05:18 -04008395 .try_mount = nfs4_try_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008396 .getattr = nfs4_proc_getattr,
8397 .setattr = nfs4_proc_setattr,
8398 .lookup = nfs4_proc_lookup,
8399 .access = nfs4_proc_access,
8400 .readlink = nfs4_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008401 .create = nfs4_proc_create,
8402 .remove = nfs4_proc_remove,
8403 .unlink_setup = nfs4_proc_unlink_setup,
Bryan Schumaker34e137c2012-03-19 14:54:41 -04008404 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008405 .unlink_done = nfs4_proc_unlink_done,
Jeff Laytond3d41522010-09-17 17:31:57 -04008406 .rename_setup = nfs4_proc_rename_setup,
Bryan Schumakerc6bfa1a2012-03-19 14:54:42 -04008407 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
Jeff Laytond3d41522010-09-17 17:31:57 -04008408 .rename_done = nfs4_proc_rename_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008409 .link = nfs4_proc_link,
8410 .symlink = nfs4_proc_symlink,
8411 .mkdir = nfs4_proc_mkdir,
8412 .rmdir = nfs4_proc_remove,
8413 .readdir = nfs4_proc_readdir,
8414 .mknod = nfs4_proc_mknod,
8415 .statfs = nfs4_proc_statfs,
8416 .fsinfo = nfs4_proc_fsinfo,
8417 .pathconf = nfs4_proc_pathconf,
David Howellse9326dc2006-08-22 20:06:10 -04008418 .set_capabilities = nfs4_server_capabilities,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008419 .decode_dirent = nfs4_decode_dirent,
Anna Schumakera4cdda52014-05-06 09:12:31 -04008420 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008421 .read_setup = nfs4_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -05008422 .read_done = nfs4_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008423 .write_setup = nfs4_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008424 .write_done = nfs4_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008425 .commit_setup = nfs4_proc_commit_setup,
Fred Isaman0b7c0152012-04-20 14:47:39 -04008426 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
Trond Myklebust788e7a82006-03-20 13:44:27 -05008427 .commit_done = nfs4_commit_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008428 .lock = nfs4_proc_lock,
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00008429 .clear_acl_cache = nfs4_zap_acl_attr,
Trond Myklebust7fe5c392009-03-19 15:35:50 -04008430 .close_context = nfs4_close_context,
Trond Myklebust2b484292010-09-17 10:56:51 -04008431 .open_context = nfs4_atomic_open,
Bryan Schumaker011e2a72012-06-20 15:53:43 -04008432 .have_delegation = nfs4_have_delegation,
Bryan Schumaker57ec14c2012-06-20 15:53:44 -04008433 .return_delegation = nfs4_inode_return_delegation,
Bryan Schumaker6663ee72012-06-20 15:53:46 -04008434 .alloc_client = nfs4_alloc_client,
Andy Adamson45a52a02011-03-01 01:34:08 +00008435 .init_client = nfs4_init_client,
Bryan Schumakercdb7ece2012-06-20 15:53:45 -04008436 .free_client = nfs4_free_client,
Bryan Schumaker1179acc2012-07-30 16:05:19 -04008437 .create_server = nfs4_create_server,
8438 .clone_server = nfs_clone_server,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008439};
8440
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008441static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8442 .prefix = XATTR_NAME_NFSV4_ACL,
8443 .list = nfs4_xattr_list_nfs4_acl,
8444 .get = nfs4_xattr_get_nfs4_acl,
8445 .set = nfs4_xattr_set_nfs4_acl,
8446};
8447
8448const struct xattr_handler *nfs4_xattr_handlers[] = {
8449 &nfs4_xattr_nfs4_acl_handler,
David Quigleyc9bccef2013-05-22 12:50:45 -04008450#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8451 &nfs4_xattr_nfs4_label_handler,
8452#endif
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +00008453 NULL
8454};
8455
Linus Torvalds1da177e2005-04-16 15:20:36 -07008456/*
8457 * Local variables:
8458 * c-basic-offset: 8
8459 * End:
8460 */