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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
NeilBrown7e06b7f2005-06-23 22:03:13 -070035#include <linux/file.h>
Anna Schumakerb0cb9082014-11-07 14:44:27 -050036#include <linux/falloc.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Mi Jinlong58e7b332011-08-28 18:18:56 +080039#include "idmap.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020040#include "cache.h"
41#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050042#include "vfs.h"
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +010043#include "current_stateid.h"
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +030044#include "netns.h"
Christoph Hellwig4ac72492013-12-20 05:16:55 -080045#include "acl.h"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020046#include "pnfs.h"
Christoph Hellwig31ef83d2014-08-16 19:02:22 -050047#include "trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
David Quigley18032ca2013-05-02 13:19:10 -040049#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50#include <linux/security.h>
51
52static inline void
53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
54{
David Howells2b0143b2015-03-17 22:25:59 +000055 struct inode *inode = d_inode(resfh->fh_dentry);
David Quigley18032ca2013-05-02 13:19:10 -040056 int status;
57
Al Viro59551022016-01-22 15:40:57 -050058 inode_lock(inode);
David Quigley18032ca2013-05-02 13:19:10 -040059 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
Al Viro59551022016-01-22 15:40:57 -050061 inode_unlock(inode);
David Quigley18032ca2013-05-02 13:19:10 -040062
63 if (status)
64 /*
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
68 */
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
70
71 return;
72}
73#else
74static inline void
75nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
76{ }
77#endif
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#define NFSDDBG_FACILITY NFSDDBG_PROC
80
Yu Zhiguo3c8e0312009-05-16 16:22:31 +080081static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
85};
86
87static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
91};
92
93static __be32
94check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
96{
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +080098
99 /*
100 * Check about attributes are supported by the NFSv4 server or not.
101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
102 */
103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
106 return nfserr_attrnotsupp;
107
108 /*
Trond Myklebusta06b1262009-08-31 15:16:11 -0400109 * Check FATTR4_WORD0_ACL can be supported
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800110 * in current environment or not.
111 */
112 if (bmval[0] & FATTR4_WORD0_ACL) {
David Howells2b0143b2015-03-17 22:25:59 +0000113 if (!IS_POSIXACL(d_inode(dentry)))
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800114 return nfserr_attrnotsupp;
115 }
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800116
117 /*
118 * According to spec, read-only attributes return ERR_INVAL.
119 */
120 if (writable) {
121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
122 (bmval[2] & ~writable[2]))
123 return nfserr_inval;
124 }
125
126 return nfs_ok;
127}
128
129static __be32
130nfsd4_check_open_attributes(struct svc_rqst *rqstp,
131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
132{
133 __be32 status = nfs_ok;
134
135 if (open->op_create == NFS4_OPEN_CREATE) {
136 if (open->op_createmode == NFS4_CREATE_UNCHECKED
137 || open->op_createmode == NFS4_CREATE_GUARDED)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd_attrmask);
140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
141 status = check_attr_support(rqstp, cstate,
142 open->op_bmval, nfsd41_ex_attrmask);
143 }
144
145 return status;
146}
147
Yu Zhiguo9208faf2009-07-06 17:24:16 +0800148static int
149is_create_with_attrs(struct nfsd4_open *open)
150{
151 return open->op_create == NFS4_OPEN_CREATE
152 && (open->op_createmode == NFS4_CREATE_UNCHECKED
153 || open->op_createmode == NFS4_CREATE_GUARDED
154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
155}
156
157/*
158 * if error occurs when setting the acl, just clear the acl bit
159 * in the returned attr bitmap.
160 */
161static void
162do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
163 struct nfs4_acl *acl, u32 *bmval)
164{
165 __be32 status;
166
167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
168 if (status)
169 /*
170 * We should probably fail the whole open at this point,
171 * but we've already created the file, so it's too late;
172 * So this seems the least of evils:
173 */
174 bmval[0] &= ~FATTR4_WORD0_ACL;
175}
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177static inline void
178fh_dup2(struct svc_fh *dst, struct svc_fh *src)
179{
180 fh_put(dst);
181 dget(src->fh_dentry);
182 if (src->fh_export)
Kinglong Meebf18f162014-06-10 22:06:44 +0800183 exp_get(src->fh_export);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 *dst = *src;
185}
186
Al Virob37ad282006-10-19 23:28:59 -0700187static __be32
J. Bruce Fieldsdc730e12006-10-17 00:10:13 -0700188do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
Al Virob37ad282006-10-19 23:28:59 -0700190 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 if (open->op_truncate &&
193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
194 return nfserr_inval;
195
J. Bruce Fieldsa0432262011-08-25 10:48:39 -0400196 accmode |= NFSD_MAY_READ_IF_EXEC;
197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200199 accmode |= NFSD_MAY_READ;
J. Bruce Fields9801d8a2006-10-17 00:10:14 -0700200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
J. Bruce Fields57ecb342009-12-01 19:42:57 -0500202 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200203 accmode |= NFSD_MAY_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
206
207 return status;
208}
209
J. Bruce Fieldsaadab6c2011-08-15 16:55:02 -0400210static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
211{
David Howells2b0143b2015-03-17 22:25:59 +0000212 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
J. Bruce Fieldsaadab6c2011-08-15 16:55:02 -0400213
214 if (S_ISREG(mode))
215 return nfs_ok;
216 if (S_ISDIR(mode))
217 return nfserr_isdir;
218 /*
219 * Using err_symlink as our catch-all case may look odd; but
220 * there's no other obvious error for this case in 4.0, and we
221 * happen to know that it will cause the linux v4 client to do
222 * the right thing on attempts to open something other than a
223 * regular file.
224 */
225 return nfserr_symlink;
226}
227
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400228static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400230 if (nfsd4_has_session(cstate))
231 return;
232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
233 &resfh->fh_handle);
234}
235
236static __be32
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500237do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400238{
239 struct svc_fh *current_fh = &cstate->current_fh;
Neil Brown7007c902012-12-07 15:40:55 -0500240 int accmode;
Al Virob37ad282006-10-19 23:28:59 -0700241 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
244 if (!*resfh)
J. Bruce Fields59deeb92012-01-27 16:49:55 -0500245 return nfserr_jukebox;
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500246 fh_init(*resfh, NFS4_FHSIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 open->op_truncate = 0;
248
249 if (open->op_create) {
Benny Halevy79fb54a2009-04-03 08:29:17 +0300250 /* FIXME: check session persistence and pnfs flags.
251 * The nfsv4.1 spec requires the following semantics:
252 *
253 * Persistent | pNFS | Server REQUIRED | Client Allowed
254 * Reply Cache | server | |
255 * -------------+--------+-----------------+--------------------
256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
257 * | | | (SHOULD)
258 * | | and EXCLUSIVE4 | or EXCLUSIVE4
259 * | | | (SHOULD NOT)
260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
261 * yes | no | GUARDED4 | GUARDED4
262 * yes | yes | GUARDED4 | GUARDED4
263 */
264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 /*
266 * Note: create modes (UNCHECKED,GUARDED...) are the same
Mi Jinlongac6721a2011-04-20 17:06:25 +0800267 * in NFSv4 as in v3 except EXCLUSIVE4_1.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 */
Mi Jinlongac6721a2011-04-20 17:06:25 +0800269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 open->op_fname.len, &open->op_iattr,
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500271 *resfh, open->op_createmode,
Jeff Layton749997e2007-07-31 00:37:51 -0700272 (u32 *)open->op_verf.data,
J. Bruce Fields856121b2011-10-13 11:37:11 -0400273 &open->op_truncate, &open->op_created);
Jeff Layton749997e2007-07-31 00:37:51 -0700274
David Quigley18032ca2013-05-02 13:19:10 -0400275 if (!status && open->op_label.len)
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
David Quigley18032ca2013-05-02 13:19:10 -0400277
J. Bruce Fields99f88722009-02-02 15:12:27 -0500278 /*
Kinglong Meeead8fb82015-07-30 21:55:02 +0800279 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
280 * use the returned bitmask to indicate which attributes
281 * we used to store the verifier:
Jeff Layton749997e2007-07-31 00:37:51 -0700282 */
Kinglong Meeead8fb82015-07-30 21:55:02 +0800283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
285 FATTR4_WORD1_TIME_MODIFY);
J. Bruce Fields43357232014-01-24 18:04:40 -0500286 } else
287 /*
288 * Note this may exit with the parent still locked.
289 * We will hold the lock until nfsd4_open's final
290 * lookup, to prevent renames or unlinks until we've had
291 * a chance to an acquire a delegation if appropriate.
292 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 status = nfsd_lookup(rqstp, current_fh,
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500294 open->op_fname.data, open->op_fname.len, *resfh);
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800295 if (status)
296 goto out;
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500297 status = nfsd_check_obj_isreg(*resfh);
J. Bruce Fields9dc4e6c2012-04-09 18:06:49 -0400298 if (status)
299 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Yu Zhiguo9208faf2009-07-06 17:24:16 +0800301 if (is_create_with_attrs(open) && open->op_acl != NULL)
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
Yu Zhiguo9208faf2009-07-06 17:24:16 +0800303
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
Neil Brown7007c902012-12-07 15:40:55 -0500305 accmode = NFSD_MAY_NOP;
J. Bruce Fields89f6c332013-06-19 15:47:37 -0400306 if (open->op_created ||
307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
Neil Brown7007c902012-12-07 15:40:55 -0500308 accmode |= NFSD_MAY_OWNER_OVERRIDE;
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500309 status = do_open_permission(rqstp, *resfh, open, accmode);
J. Bruce Fields41fd1e42012-01-27 16:26:02 -0500310 set_change_info(&open->op_cinfo, current_fh);
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800311out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 return status;
313}
314
Al Virob37ad282006-10-19 23:28:59 -0700315static __be32
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400316do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400318 struct svc_fh *current_fh = &cstate->current_fh;
Al Virob37ad282006-10-19 23:28:59 -0700319 __be32 status;
J. Bruce Fields9f415eb2013-05-03 16:09:09 -0400320 int accmode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 /* We don't know the target directory, and therefore can not
323 * set the change info
324 */
325
326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
327
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
331 (open->op_iattr.ia_size == 0);
J. Bruce Fields9f415eb2013-05-03 16:09:09 -0400332 /*
333 * In the delegation case, the client is telling us about an
334 * open that it *already* performed locally, some time ago. We
335 * should let it succeed now if possible.
336 *
337 * In the case of a CLAIM_FH open, on the other hand, the client
338 * may be counting on us to enforce permissions (the Linux 4.1
339 * client uses this for normal opens, for example).
340 */
341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
342 accmode = NFSD_MAY_OWNER_OVERRIDE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
J. Bruce Fields9f415eb2013-05-03 16:09:09 -0400344 status = do_open_permission(rqstp, current_fh, open, accmode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 return status;
347}
348
Andy Adamson60adfc52009-04-03 08:28:50 +0300349static void
350copy_clientid(clientid_t *clid, struct nfsd4_session *session)
351{
352 struct nfsd4_sessionid *sid =
353 (struct nfsd4_sessionid *)session->se_sessionid.data;
354
355 clid->cl_boot = sid->clientid.cl_boot;
356 clid->cl_id = sid->clientid.cl_id;
357}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
J.Bruce Fields71911552006-12-13 00:35:29 -0800359static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800360nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800361 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
Al Virob37ad282006-10-19 23:28:59 -0700363 __be32 status;
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500364 struct svc_fh *resfh = NULL;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +0300365 struct net *net = SVC_NET(rqstp);
366 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Andy Adamson66689582009-04-03 08:28:45 +0300367
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 (int)open->op_fname.len, open->op_fname.data,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400370 open->op_openowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* This check required by spec. */
373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
374 return nfserr_inval;
375
J. Bruce Fields856121b2011-10-13 11:37:11 -0400376 open->op_created = 0;
Mi Jinlongab1350b2011-07-14 15:06:26 +0800377 /*
378 * RFC5661 18.51.3
379 * Before RECLAIM_COMPLETE done, server should deny new lock
380 */
381 if (nfsd4_has_session(cstate) &&
Jeff Laytona52d7262012-03-21 09:52:02 -0400382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
383 &cstate->session->se_client->cl_flags) &&
Mi Jinlongab1350b2011-07-14 15:06:26 +0800384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
385 return nfserr_grace;
386
Andy Adamson60adfc52009-04-03 08:28:50 +0300387 if (nfsd4_has_session(cstate))
388 copy_clientid(&open->op_clientid, cstate->session);
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 /* check seqid for replay. set nfs4_owner */
Kinglong Mee6cd22662015-07-13 17:32:05 +0800391 status = nfsd4_process_open1(cstate, open, nn);
Al Viroa90b0612006-10-19 23:29:03 -0700392 if (status == nfserr_replay_me) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800394 fh_put(&cstate->current_fh);
J. Bruce Fieldsa4773c082009-02-02 17:23:10 -0500395 fh_copy_shallow(&cstate->current_fh.fh_handle,
396 &rp->rp_openfh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 if (status)
399 dprintk("nfsd4_open: replay failed"
400 " restoring previous filehandle\n");
401 else
Al Viroa90b0612006-10-19 23:29:03 -0700402 status = nfserr_replay_me;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 }
404 if (status)
405 goto out;
J. Bruce Fields9d313b12013-02-28 12:51:49 -0800406 if (open->op_xdr_error) {
407 status = open->op_xdr_error;
408 goto out;
409 }
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800410
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800411 status = nfsd4_check_open_attributes(rqstp, cstate, open);
412 if (status)
413 goto out;
414
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800415 /* Openowner is now set, so sequence id will get bumped. Now we need
416 * these checks before we do any creates: */
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800417 status = nfserr_grace;
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -0400418 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800419 goto out;
420 status = nfserr_no_grace;
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -0400421 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800422 goto out;
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 switch (open->op_claim_type) {
NeilBrown0dd3c192005-06-23 22:02:56 -0700425 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 case NFS4_OPEN_CLAIM_NULL:
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500427 status = do_open_lookup(rqstp, cstate, open, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 if (status)
429 goto out;
430 break;
431 case NFS4_OPEN_CLAIM_PREVIOUS:
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +0300432 status = nfs4_check_open_reclaim(&open->op_clientid,
Trond Myklebust0fe492d2014-06-30 11:48:47 -0400433 cstate, nn);
Mi Jinlong0cf99b92011-11-23 10:48:40 +0800434 if (status)
435 goto out;
Jeff Laytonba5378b2014-05-30 09:09:28 -0400436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fields8b289b22011-10-19 11:52:12 -0400437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
J. Bruce Fieldsbbc9c362013-03-22 18:03:49 -0400439 status = do_open_fhandle(rqstp, cstate, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (status)
441 goto out;
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500442 resfh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 break;
J. Bruce Fields8b289b22011-10-19 11:52:12 -0400444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
J. Bruce Fields2fdada02007-07-27 16:10:37 -0400446 dprintk("NFSD: unsupported OPEN claim type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 open->op_claim_type);
448 status = nfserr_notsupp;
449 goto out;
450 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -0400451 dprintk("NFSD: Invalid OPEN claim type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 open->op_claim_type);
453 status = nfserr_inval;
454 goto out;
455 }
456 /*
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
460 */
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500461 status = nfsd4_process_open2(rqstp, resfh, open);
Jeff Laytonb3fbfe02014-07-29 21:37:44 -0400462 WARN(status && open->op_created,
463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
464 be32_to_cpu(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465out:
J. Bruce Fieldsc0e6bee2012-01-27 17:26:06 -0500466 if (resfh && resfh != &cstate->current_fh) {
467 fh_dup2(&cstate->current_fh, resfh);
468 fh_put(resfh);
469 kfree(resfh);
470 }
Jeff Layton42297892015-03-23 10:53:44 -0400471 nfsd4_cleanup_open_state(cstate, open);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -0400472 nfsd4_bump_seqid(cstate, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return status;
474}
475
476/*
J. Bruce Fields9d313b12013-02-28 12:51:49 -0800477 * OPEN is the only seqid-mutating operation whose decoding can fail
478 * with a seqid-mutating error (specifically, decoding of user names in
479 * the attributes). Therefore we have to do some processing to look up
480 * the stateowner so that we can bump the seqid.
481 */
482static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
483{
484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
485
486 if (!seqid_mutating_err(ntohl(op->status)))
487 return op->status;
488 if (nfsd4_has_session(cstate))
489 return op->status;
490 open->op_xdr_error = op->status;
491 return nfsd4_open(rqstp, cstate, open);
492}
493
494/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 * filehandle-manipulating ops.
496 */
J.Bruce Fields71911552006-12-13 00:35:29 -0800497static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800498nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct svc_fh **getfh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800501 if (!cstate->current_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 return nfserr_nofilehandle;
503
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800504 *getfh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 return nfs_ok;
506}
507
J.Bruce Fields71911552006-12-13 00:35:29 -0800508static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800509nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 struct nfsd4_putfh *putfh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800512 fh_put(&cstate->current_fh);
513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
515 putfh->pf_fhlen);
J. Bruce Fields68d93182011-04-08 17:00:50 -0400516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517}
518
J.Bruce Fields71911552006-12-13 00:35:29 -0800519static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800520nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
Al Virob37ad282006-10-19 23:28:59 -0700523 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800525 fh_put(&cstate->current_fh);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -0700526 status = exp_pseudoroot(rqstp, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 return status;
528}
529
J.Bruce Fields71911552006-12-13 00:35:29 -0800530static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800531nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
532 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800534 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 return nfserr_restorefh;
536
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800537 fh_dup2(&cstate->current_fh, &cstate->save_fh);
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +0100538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
541 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 return nfs_ok;
543}
544
J.Bruce Fields71911552006-12-13 00:35:29 -0800545static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800546nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800549 if (!cstate->current_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return nfserr_nofilehandle;
551
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800552 fh_dup2(&cstate->save_fh, &cstate->current_fh);
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +0100553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
556 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 return nfs_ok;
558}
559
560/*
561 * misc nfsv4 ops
562 */
J.Bruce Fields71911552006-12-13 00:35:29 -0800563static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800564nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
565 struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
567 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
568 return nfserr_inval;
569
570 access->ac_resp_access = access->ac_req_access;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
572 &access->ac_supported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
Stanislav Kinsburskyb9c0ef82012-12-06 14:23:19 +0300575static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
Chuck Leverab4684d2012-03-02 17:13:50 -0500576{
577 __be32 verf[2];
Stanislav Kinsburskyb9c0ef82012-12-06 14:23:19 +0300578 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Chuck Leverab4684d2012-03-02 17:13:50 -0500579
Jeff Laytonf4199922014-06-17 07:44:11 -0400580 /*
581 * This is opaque to client, so no need to byte-swap. Use
582 * __force to keep sparse happy
583 */
584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
Chuck Leverab4684d2012-03-02 17:13:50 -0500586 memcpy(verifier->data, verf, sizeof(verifier->data));
587}
588
J.Bruce Fields71911552006-12-13 00:35:29 -0800589static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800590nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592{
Stanislav Kinsburskyb9c0ef82012-12-06 14:23:19 +0300593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
J. Bruce Fields75c096f2011-08-15 18:39:32 -0400594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800595 commit->co_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596}
597
Al Virob37ad282006-10-19 23:28:59 -0700598static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800599nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
600 struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601{
602 struct svc_fh resfh;
Al Virob37ad282006-10-19 23:28:59 -0700603 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 dev_t rdev;
605
606 fh_init(&resfh, NFS4_FHSIZE);
607
J. Bruce Fieldsfa081392016-07-21 16:00:12 -0400608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 if (status)
610 return status;
611
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800612 status = check_attr_support(rqstp, cstate, create->cr_bmval,
613 nfsd_attrmask);
614 if (status)
615 return status;
616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 switch (create->cr_type) {
618 case NF4LNK:
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800619 status = nfsd_symlink(rqstp, &cstate->current_fh,
620 create->cr_name, create->cr_namelen,
Kinglong Mee1e444f52014-07-01 17:48:02 +0800621 create->cr_data, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 break;
623
624 case NF4BLK:
625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
626 if (MAJOR(rdev) != create->cr_specdata1 ||
627 MINOR(rdev) != create->cr_specdata2)
628 return nfserr_inval;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800629 status = nfsd_create(rqstp, &cstate->current_fh,
630 create->cr_name, create->cr_namelen,
631 &create->cr_iattr, S_IFBLK, rdev, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 break;
633
634 case NF4CHR:
635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
636 if (MAJOR(rdev) != create->cr_specdata1 ||
637 MINOR(rdev) != create->cr_specdata2)
638 return nfserr_inval;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr,S_IFCHR, rdev, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 break;
643
644 case NF4SOCK:
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFSOCK, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 break;
649
650 case NF4FIFO:
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800651 status = nfsd_create(rqstp, &cstate->current_fh,
652 create->cr_name, create->cr_namelen,
653 &create->cr_iattr, S_IFIFO, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 break;
655
656 case NF4DIR:
657 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800658 status = nfsd_create(rqstp, &cstate->current_fh,
659 create->cr_name, create->cr_namelen,
660 &create->cr_iattr, S_IFDIR, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 break;
662
663 default:
664 status = nfserr_badtype;
665 }
666
Yu Zhiguo9208faf2009-07-06 17:24:16 +0800667 if (status)
668 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
David Quigley18032ca2013-05-02 13:19:10 -0400670 if (create->cr_label.len)
671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
672
Yu Zhiguo9208faf2009-07-06 17:24:16 +0800673 if (create->cr_acl != NULL)
674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
675 create->cr_bmval);
676
677 fh_unlock(&cstate->current_fh);
678 set_change_info(&create->cr_cinfo, &cstate->current_fh);
679 fh_dup2(&cstate->current_fh, &resfh);
680out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 fh_put(&resfh);
682 return status;
683}
684
J.Bruce Fields71911552006-12-13 00:35:29 -0800685static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800686nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
687 struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688{
Al Virob37ad282006-10-19 23:28:59 -0700689 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200691 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 if (status)
693 return status;
694
695 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
696 return nfserr_inval;
697
Andy Adamson7e705702009-04-03 08:29:11 +0300698 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
699 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
700 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800702 getattr->ga_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 return nfs_ok;
704}
705
J.Bruce Fields71911552006-12-13 00:35:29 -0800706static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800707nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
708 struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709{
Al Virob37ad282006-10-19 23:28:59 -0700710 __be32 status = nfserr_nofilehandle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800712 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 return status;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800714 status = nfsd_link(rqstp, &cstate->current_fh,
715 link->li_name, link->li_namelen, &cstate->save_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 if (!status)
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800717 set_change_info(&link->li_cinfo, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 return status;
719}
720
J. Bruce Fields0ff7ab42010-12-16 10:06:27 -0500721static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722{
723 struct svc_fh tmp_fh;
Al Virob37ad282006-10-19 23:28:59 -0700724 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726 fh_init(&tmp_fh, NFS4_FHSIZE);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -0700727 ret = exp_pseudoroot(rqstp, &tmp_fh);
728 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 return ret;
J. Bruce Fields0ff7ab42010-12-16 10:06:27 -0500730 if (tmp_fh.fh_dentry == fh->fh_dentry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 fh_put(&tmp_fh);
732 return nfserr_noent;
733 }
734 fh_put(&tmp_fh);
J. Bruce Fields0ff7ab42010-12-16 10:06:27 -0500735 return nfsd_lookup(rqstp, fh, "..", 2, fh);
736}
737
738static __be32
739nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
740 void *arg)
741{
742 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743}
744
J.Bruce Fields71911552006-12-13 00:35:29 -0800745static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800746nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
747 struct nfsd4_lookup *lookup)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800749 return nfsd_lookup(rqstp, &cstate->current_fh,
750 lookup->lo_name, lookup->lo_len,
751 &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752}
753
J.Bruce Fields71911552006-12-13 00:35:29 -0800754static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800755nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
756 struct nfsd4_read *read)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757{
Al Virob37ad282006-10-19 23:28:59 -0700758 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
NeilBrown7e06b7f2005-06-23 22:03:13 -0700760 read->rd_filp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (read->rd_offset >= OFFSET_MAX)
762 return nfserr_inval;
763
J. Bruce Fields9b3234b2012-12-04 18:03:46 -0500764 /*
765 * If we do a zero copy read, then a client will see read data
766 * that reflects the state of the file *after* performing the
767 * following compound.
768 *
769 * To ensure proper ordering, we therefore turn off zero copy if
770 * the client wants us to do more in this compound:
771 */
772 if (!nfsd4_last_compound_op(rqstp))
Jeff Layton779fb0f2014-11-19 07:51:18 -0500773 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
J. Bruce Fields9b3234b2012-12-04 18:03:46 -0500774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 /* check stateid */
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +0100776 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
777 &read->rd_stateid, RD_STATE,
778 &read->rd_filp, &read->rd_tmp_file);
Christoph Hellwigaf90f702015-06-18 16:45:00 +0200779 if (status) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
781 goto out;
782 }
783 status = nfs_ok;
784out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 read->rd_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800786 read->rd_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 return status;
788}
789
J.Bruce Fields71911552006-12-13 00:35:29 -0800790static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800791nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
794 u64 cookie = readdir->rd_cookie;
795 static const nfs4_verifier zeroverf;
796
797 /* no need to check permission - this will be done in nfsd_readdir() */
798
799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
800 return nfserr_inval;
801
Andy Adamson7e705702009-04-03 08:29:11 +0300802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Bernd Schubert832023b2011-08-08 17:38:08 +0200806 if ((cookie == 1) || (cookie == 2) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
808 return nfserr_bad_cookie;
809
810 readdir->rd_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800811 readdir->rd_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 return nfs_ok;
813}
814
J.Bruce Fields71911552006-12-13 00:35:29 -0800815static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800816nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
817 struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818{
819 readlink->rl_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800820 readlink->rl_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 return nfs_ok;
822}
823
J.Bruce Fields71911552006-12-13 00:35:29 -0800824static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800825nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827{
Al Virob37ad282006-10-19 23:28:59 -0700828 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -0400830 if (opens_in_grace(SVC_NET(rqstp)))
NeilBrownc815afc2005-06-23 22:03:00 -0700831 return nfserr_grace;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
833 remove->rm_name, remove->rm_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 if (!status) {
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800835 fh_unlock(&cstate->current_fh);
836 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 }
838 return status;
839}
840
J.Bruce Fields71911552006-12-13 00:35:29 -0800841static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800842nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Al Virob37ad282006-10-19 23:28:59 -0700845 __be32 status = nfserr_nofilehandle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800847 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 return status;
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -0400849 if (opens_in_grace(SVC_NET(rqstp)) &&
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +0400850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
NeilBrownc815afc2005-06-23 22:03:00 -0700851 return nfserr_grace;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 rename->rn_tname, rename->rn_tnamelen);
J. Bruce Fields2a6cf942013-04-30 15:28:51 -0400855 if (status)
856 return status;
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
859 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860}
861
J.Bruce Fields71911552006-12-13 00:35:29 -0800862static __be32
Andy Adamsondcb488a32007-07-17 04:04:51 -0700863nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_secinfo *secinfo)
865{
Andy Adamsondcb488a32007-07-17 04:04:51 -0700866 struct svc_export *exp;
867 struct dentry *dentry;
868 __be32 err;
869
J. Bruce Fields29a78a32011-04-09 11:28:53 -0400870 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
871 if (err)
872 return err;
Andy Adamsondcb488a32007-07-17 04:04:51 -0700873 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
874 secinfo->si_name, secinfo->si_namelen,
875 &exp, &dentry);
876 if (err)
877 return err;
J. Bruce Fields2f6fc052016-03-02 16:36:21 -0800878 fh_unlock(&cstate->current_fh);
David Howells2b0143b2015-03-17 22:25:59 +0000879 if (d_really_is_negative(dentry)) {
Andy Adamsondcb488a32007-07-17 04:04:51 -0700880 exp_put(exp);
881 err = nfserr_noent;
882 } else
883 secinfo->si_exp = exp;
884 dput(dentry);
J. Bruce Fields56560b92010-12-16 09:57:15 -0500885 if (cstate->minorversion)
886 /* See rfc 5661 section 2.6.3.1.1.8 */
887 fh_put(&cstate->current_fh);
Andy Adamsondcb488a32007-07-17 04:04:51 -0700888 return err;
889}
890
891static __be32
J. Bruce Fields04f4ad12010-12-16 09:51:13 -0500892nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
893 struct nfsd4_secinfo_no_name *sin)
894{
895 __be32 err;
896
897 switch (sin->sin_style) {
898 case NFS4_SECINFO_STYLE4_CURRENT_FH:
899 break;
900 case NFS4_SECINFO_STYLE4_PARENT:
901 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
902 if (err)
903 return err;
904 break;
905 default:
906 return nfserr_inval;
907 }
Kinglong Meebf18f162014-06-10 22:06:44 +0800908
909 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
J. Bruce Fields04f4ad12010-12-16 09:51:13 -0500910 fh_put(&cstate->current_fh);
911 return nfs_ok;
912}
913
914static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800915nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
916 struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917{
Al Virob37ad282006-10-19 23:28:59 -0700918 __be32 status = nfs_ok;
Al Viro96f6f982012-04-12 23:47:00 -0400919 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
Christoph Hellwigaf90f702015-06-18 16:45:00 +0200922 status = nfs4_preprocess_stateid_op(rqstp, cstate,
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +0100923 &cstate->current_fh, &setattr->sa_stateid,
924 WR_STATE, NULL, NULL);
J. Bruce Fields375c5542006-01-18 17:43:33 -0800925 if (status) {
Greg Banks3e3b4802006-10-02 02:17:41 -0700926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
J. Bruce Fields375c5542006-01-18 17:43:33 -0800927 return status;
928 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 }
Al Viro96f6f982012-04-12 23:47:00 -0400930 err = fh_want_write(&cstate->current_fh);
931 if (err)
932 return nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 status = nfs_ok;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800934
935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
936 nfsd_attrmask);
937 if (status)
938 goto out;
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 if (setattr->sa_acl != NULL)
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
942 setattr->sa_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 if (status)
Dave Hansen18f335a2008-02-15 14:37:38 -0800944 goto out;
David Quigley18032ca2013-05-02 13:19:10 -0400945 if (setattr->sa_label.len)
946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
947 &setattr->sa_label);
948 if (status)
949 goto out;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 0, (time_t)0);
Dave Hansen18f335a2008-02-15 14:37:38 -0800952out:
Al Virobad0dcf2011-11-23 12:03:18 -0500953 fh_drop_write(&cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 return status;
955}
956
J. Bruce Fieldsffe11372012-11-15 14:52:19 -0500957static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
958{
959 int i = 1;
960 int buflen = write->wr_buflen;
961
962 vec[0].iov_base = write->wr_head.iov_base;
963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
964 buflen -= vec[0].iov_len;
965
966 while (buflen) {
967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
969 buflen -= vec[i].iov_len;
970 i++;
971 }
972 return i;
973}
974
J.Bruce Fields71911552006-12-13 00:35:29 -0800975static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800976nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978{
979 stateid_t *stateid = &write->wr_stateid;
980 struct file *filp = NULL;
Al Virob37ad282006-10-19 23:28:59 -0700981 __be32 status = nfs_ok;
David Shaw31dec252009-03-05 20:16:14 -0500982 unsigned long cnt;
J. Bruce Fieldsffe11372012-11-15 14:52:19 -0500983 int nvecs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 if (write->wr_offset >= OFFSET_MAX)
986 return nfserr_inval;
987
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +0100988 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
989 stateid, WR_STATE, &filp, NULL);
J. Bruce Fields375c5542006-01-18 17:43:33 -0800990 if (status) {
991 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
992 return status;
993 }
994
David Shaw31dec252009-03-05 20:16:14 -0500995 cnt = write->wr_buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 write->wr_how_written = write->wr_stable_how;
Stanislav Kinsburskyb9c0ef82012-12-06 14:23:19 +0300997 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
J. Bruce Fieldsffe11372012-11-15 14:52:19 -0500999 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1000 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1001
Christoph Hellwigaf90f702015-06-18 16:45:00 +02001002 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1003 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1004 &write->wr_how_written);
1005 fput(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
David Shaw31dec252009-03-05 20:16:14 -05001007 write->wr_bytes_written = cnt;
1008
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010}
1011
Anna Schumaker24bab492014-09-26 13:58:27 -04001012static __be32
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001013nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1014 stateid_t *src_stateid, struct file **src,
1015 stateid_t *dst_stateid, struct file **dst)
Christoph Hellwigffa01602015-12-03 12:59:52 +01001016{
Christoph Hellwigffa01602015-12-03 12:59:52 +01001017 __be32 status;
1018
1019 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001020 src_stateid, RD_STATE, src, NULL);
Christoph Hellwigffa01602015-12-03 12:59:52 +01001021 if (status) {
1022 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1023 goto out;
1024 }
1025
1026 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001027 dst_stateid, WR_STATE, dst, NULL);
Christoph Hellwigffa01602015-12-03 12:59:52 +01001028 if (status) {
1029 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1030 goto out_put_src;
1031 }
1032
1033 /* fix up for NFS-specific error code */
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001034 if (!S_ISREG(file_inode(*src)->i_mode) ||
1035 !S_ISREG(file_inode(*dst)->i_mode)) {
Christoph Hellwigffa01602015-12-03 12:59:52 +01001036 status = nfserr_wrong_type;
1037 goto out_put_dst;
1038 }
1039
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001040out:
1041 return status;
1042out_put_dst:
1043 fput(*dst);
1044out_put_src:
1045 fput(*src);
1046 goto out;
1047}
1048
1049static __be32
1050nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1051 struct nfsd4_clone *clone)
1052{
1053 struct file *src, *dst;
1054 __be32 status;
1055
1056 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1057 &clone->cl_dst_stateid, &dst);
1058 if (status)
1059 goto out;
1060
Christoph Hellwigffa01602015-12-03 12:59:52 +01001061 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1062 dst, clone->cl_dst_pos, clone->cl_count);
1063
Christoph Hellwigffa01602015-12-03 12:59:52 +01001064 fput(dst);
Christoph Hellwigffa01602015-12-03 12:59:52 +01001065 fput(src);
1066out:
1067 return status;
1068}
1069
1070static __be32
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001071nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1072 struct nfsd4_copy *copy)
1073{
1074 struct file *src, *dst;
1075 __be32 status;
1076 ssize_t bytes;
1077
1078 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1079 &copy->cp_dst_stateid, &dst);
1080 if (status)
1081 goto out;
1082
1083 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1084 dst, copy->cp_dst_pos, copy->cp_count);
1085
1086 if (bytes < 0)
1087 status = nfserrno(bytes);
1088 else {
1089 copy->cp_res.wr_bytes_written = bytes;
1090 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1091 copy->cp_consecutive = 1;
1092 copy->cp_synchronous = 1;
1093 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1094 status = nfs_ok;
1095 }
1096
1097 fput(src);
1098 fput(dst);
1099out:
1100 return status;
1101}
1102
1103static __be32
Anna Schumaker95d871f2014-11-07 14:44:26 -05001104nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1105 struct nfsd4_fallocate *fallocate, int flags)
1106{
1107 __be32 status = nfserr_notsupp;
1108 struct file *file;
1109
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +01001110 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
Anna Schumaker95d871f2014-11-07 14:44:26 -05001111 &fallocate->falloc_stateid,
Christoph Hellwigaf90f702015-06-18 16:45:00 +02001112 WR_STATE, &file, NULL);
Anna Schumaker95d871f2014-11-07 14:44:26 -05001113 if (status != nfs_ok) {
1114 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1115 return status;
1116 }
1117
1118 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1119 fallocate->falloc_offset,
1120 fallocate->falloc_length,
1121 flags);
1122 fput(file);
1123 return status;
1124}
1125
1126static __be32
1127nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1128 struct nfsd4_fallocate *fallocate)
1129{
1130 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1131}
1132
1133static __be32
Anna Schumakerb0cb9082014-11-07 14:44:27 -05001134nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1135 struct nfsd4_fallocate *fallocate)
1136{
1137 return nfsd4_fallocate(rqstp, cstate, fallocate,
1138 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1139}
1140
1141static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04001142nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1143 struct nfsd4_seek *seek)
1144{
1145 int whence;
1146 __be32 status;
1147 struct file *file;
1148
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +01001149 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
Anna Schumaker24bab492014-09-26 13:58:27 -04001150 &seek->seek_stateid,
Christoph Hellwigaf90f702015-06-18 16:45:00 +02001151 RD_STATE, &file, NULL);
Anna Schumaker24bab492014-09-26 13:58:27 -04001152 if (status) {
1153 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1154 return status;
1155 }
1156
1157 switch (seek->seek_whence) {
1158 case NFS4_CONTENT_DATA:
1159 whence = SEEK_DATA;
1160 break;
1161 case NFS4_CONTENT_HOLE:
1162 whence = SEEK_HOLE;
1163 break;
1164 default:
1165 status = nfserr_union_notsupp;
1166 goto out;
1167 }
1168
1169 /*
1170 * Note: This call does change file->f_pos, but nothing in NFSD
1171 * should ever file->f_pos.
1172 */
1173 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1174 if (seek->seek_pos < 0)
1175 status = nfserrno(seek->seek_pos);
1176 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1177 seek->seek_eof = true;
1178
1179out:
1180 fput(file);
1181 return status;
1182}
1183
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184/* This routine never returns NFS_OK! If there are no other errors, it
1185 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1186 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1187 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1188 */
Al Virob37ad282006-10-19 23:28:59 -07001189static __be32
J.Bruce Fieldsc954e2a2006-12-13 00:35:31 -08001190_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08001191 struct nfsd4_verify *verify)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192{
Al Viro2ebbc012006-10-19 23:28:58 -07001193 __be32 *buf, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 int count;
Al Virob37ad282006-10-19 23:28:59 -07001195 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
Miklos Szeredi8837abc2008-06-16 13:20:29 +02001197 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 if (status)
1199 return status;
1200
Yu Zhiguo3c8e0312009-05-16 16:22:31 +08001201 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1202 if (status)
1203 return status;
1204
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1206 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1207 return nfserr_inval;
1208 if (verify->ve_attrlen & 3)
1209 return nfserr_inval;
1210
1211 /* count in words:
1212 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1213 */
1214 count = 4 + (verify->ve_attrlen >> 2);
1215 buf = kmalloc(count << 2, GFP_KERNEL);
1216 if (!buf)
J. Bruce Fields3e772462011-08-10 19:07:33 -04001217 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
J. Bruce Fields84822d02012-12-14 17:57:50 -05001219 p = buf;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04001220 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08001221 cstate->current_fh.fh_export,
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04001222 cstate->current_fh.fh_dentry,
1223 verify->ve_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08001224 rqstp, 0);
J. Bruce Fields41ae6e72013-08-21 15:32:50 -04001225 /*
1226 * If nfsd4_encode_fattr() ran out of space, assume that's because
1227 * the attributes are longer (hence different) than those given:
1228 */
J. Bruce Fields84822d02012-12-14 17:57:50 -05001229 if (status == nfserr_resource)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 status = nfserr_not_same;
1231 if (status)
1232 goto out_kfree;
1233
Benny Halevy95ec28c2009-04-03 08:29:08 +03001234 /* skip bitmap */
1235 p = buf + 1 + ntohl(buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 status = nfserr_not_same;
1237 if (ntohl(*p++) != verify->ve_attrlen)
1238 goto out_kfree;
1239 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1240 status = nfserr_same;
1241
1242out_kfree:
1243 kfree(buf);
1244 return status;
1245}
1246
J.Bruce Fieldsc954e2a2006-12-13 00:35:31 -08001247static __be32
1248nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1249 struct nfsd4_verify *verify)
1250{
1251 __be32 status;
1252
1253 status = _nfsd4_verify(rqstp, cstate, verify);
1254 return status == nfserr_not_same ? nfs_ok : status;
1255}
1256
1257static __be32
1258nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1259 struct nfsd4_verify *verify)
1260{
1261 __be32 status;
1262
1263 status = _nfsd4_verify(rqstp, cstate, verify);
1264 return status == nfserr_same ? nfs_ok : status;
1265}
1266
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001267#ifdef CONFIG_NFSD_PNFS
1268static const struct nfsd4_layout_ops *
1269nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1270{
Jeff Layton8a4c3922016-07-10 15:55:58 -04001271 if (!exp->ex_layout_types) {
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001272 dprintk("%s: export does not support pNFS\n", __func__);
1273 return NULL;
1274 }
1275
Jeff Layton8a4c3922016-07-10 15:55:58 -04001276 if (!(exp->ex_layout_types & (1 << layout_type))) {
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001277 dprintk("%s: layout type %d not supported\n",
1278 __func__, layout_type);
1279 return NULL;
1280 }
1281
1282 return nfsd4_layout_ops[layout_type];
1283}
1284
1285static __be32
1286nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1287 struct nfsd4_compound_state *cstate,
1288 struct nfsd4_getdeviceinfo *gdp)
1289{
1290 const struct nfsd4_layout_ops *ops;
1291 struct nfsd4_deviceid_map *map;
1292 struct svc_export *exp;
1293 __be32 nfserr;
1294
1295 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1296 __func__,
1297 gdp->gd_layout_type,
1298 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1299 gdp->gd_maxcount);
1300
1301 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1302 if (!map) {
1303 dprintk("%s: couldn't find device ID to export mapping!\n",
1304 __func__);
1305 return nfserr_noent;
1306 }
1307
1308 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1309 if (IS_ERR(exp)) {
1310 dprintk("%s: could not find device id\n", __func__);
1311 return nfserr_noent;
1312 }
1313
1314 nfserr = nfserr_layoutunavailable;
1315 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1316 if (!ops)
1317 goto out;
1318
1319 nfserr = nfs_ok;
Christoph Hellwigf99d4fb2016-03-04 20:46:17 +01001320 if (gdp->gd_maxcount != 0) {
1321 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
Tom Haynesd7c920d2016-06-14 13:41:27 -07001322 rqstp, cstate->session->se_client, gdp);
Christoph Hellwigf99d4fb2016-03-04 20:46:17 +01001323 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001324
1325 gdp->gd_notify_types &= ops->notify_types;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001326out:
Kinglong Meea1420382015-03-15 23:12:15 +08001327 exp_put(exp);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001328 return nfserr;
1329}
1330
1331static __be32
1332nfsd4_layoutget(struct svc_rqst *rqstp,
1333 struct nfsd4_compound_state *cstate,
1334 struct nfsd4_layoutget *lgp)
1335{
1336 struct svc_fh *current_fh = &cstate->current_fh;
1337 const struct nfsd4_layout_ops *ops;
1338 struct nfs4_layout_stateid *ls;
1339 __be32 nfserr;
1340 int accmode;
1341
1342 switch (lgp->lg_seg.iomode) {
1343 case IOMODE_READ:
1344 accmode = NFSD_MAY_READ;
1345 break;
1346 case IOMODE_RW:
1347 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1348 break;
1349 default:
1350 dprintk("%s: invalid iomode %d\n",
1351 __func__, lgp->lg_seg.iomode);
1352 nfserr = nfserr_badiomode;
1353 goto out;
1354 }
1355
1356 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1357 if (nfserr)
1358 goto out;
1359
1360 nfserr = nfserr_layoutunavailable;
1361 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1362 if (!ops)
1363 goto out;
1364
1365 /*
1366 * Verify minlength and range as per RFC5661:
1367 * o If loga_length is less than loga_minlength,
1368 * the metadata server MUST return NFS4ERR_INVAL.
1369 * o If the sum of loga_offset and loga_minlength exceeds
1370 * NFS4_UINT64_MAX, and loga_minlength is not
1371 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1372 * o If the sum of loga_offset and loga_length exceeds
1373 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1374 * the error NFS4ERR_INVAL MUST result.
1375 */
1376 nfserr = nfserr_inval;
1377 if (lgp->lg_seg.length < lgp->lg_minlength ||
1378 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1379 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1380 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1381 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1382 goto out;
1383 if (lgp->lg_seg.length == 0)
1384 goto out;
1385
1386 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1387 true, lgp->lg_layout_type, &ls);
Christoph Hellwig31ef83d2014-08-16 19:02:22 -05001388 if (nfserr) {
1389 trace_layout_get_lookup_fail(&lgp->lg_sid);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001390 goto out;
Christoph Hellwig31ef83d2014-08-16 19:02:22 -05001391 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001392
Christoph Hellwigc5c707f2014-09-23 12:38:48 +02001393 nfserr = nfserr_recallconflict;
1394 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1395 goto out_put_stid;
1396
David Howells2b0143b2015-03-17 22:25:59 +00001397 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001398 current_fh, lgp);
1399 if (nfserr)
1400 goto out_put_stid;
1401
1402 nfserr = nfsd4_insert_layout(lgp, ls);
1403
1404out_put_stid:
Jeff Laytoncc8a5532015-09-17 07:58:24 -04001405 mutex_unlock(&ls->ls_mutex);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001406 nfs4_put_stid(&ls->ls_stid);
1407out:
1408 return nfserr;
1409}
1410
1411static __be32
1412nfsd4_layoutcommit(struct svc_rqst *rqstp,
1413 struct nfsd4_compound_state *cstate,
1414 struct nfsd4_layoutcommit *lcp)
1415{
1416 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1417 struct svc_fh *current_fh = &cstate->current_fh;
1418 const struct nfsd4_layout_ops *ops;
1419 loff_t new_size = lcp->lc_last_wr + 1;
1420 struct inode *inode;
1421 struct nfs4_layout_stateid *ls;
1422 __be32 nfserr;
1423
1424 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1425 if (nfserr)
1426 goto out;
1427
1428 nfserr = nfserr_layoutunavailable;
1429 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1430 if (!ops)
1431 goto out;
David Howells2b0143b2015-03-17 22:25:59 +00001432 inode = d_inode(current_fh->fh_dentry);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001433
1434 nfserr = nfserr_inval;
1435 if (new_size <= seg->offset) {
1436 dprintk("pnfsd: last write before layout segment\n");
1437 goto out;
1438 }
1439 if (new_size > seg->offset + seg->length) {
1440 dprintk("pnfsd: last write beyond layout segment\n");
1441 goto out;
1442 }
1443 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1444 dprintk("pnfsd: layoutcommit beyond EOF\n");
1445 goto out;
1446 }
1447
1448 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1449 false, lcp->lc_layout_type,
1450 &ls);
1451 if (nfserr) {
Christoph Hellwig31ef83d2014-08-16 19:02:22 -05001452 trace_layout_commit_lookup_fail(&lcp->lc_sid);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001453 /* fixup error code as per RFC5661 */
1454 if (nfserr == nfserr_bad_stateid)
1455 nfserr = nfserr_badlayout;
1456 goto out;
1457 }
1458
Jeff Laytoncc8a5532015-09-17 07:58:24 -04001459 /* LAYOUTCOMMIT does not require any serialization */
1460 mutex_unlock(&ls->ls_mutex);
1461
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001462 if (new_size > i_size_read(inode)) {
1463 lcp->lc_size_chg = 1;
1464 lcp->lc_newsize = new_size;
1465 } else {
1466 lcp->lc_size_chg = 0;
1467 }
1468
Kinglong Meed8398fc2015-07-07 10:12:03 +08001469 nfserr = ops->proc_layoutcommit(inode, lcp);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001470 nfs4_put_stid(&ls->ls_stid);
1471out:
1472 return nfserr;
1473}
1474
1475static __be32
1476nfsd4_layoutreturn(struct svc_rqst *rqstp,
1477 struct nfsd4_compound_state *cstate,
1478 struct nfsd4_layoutreturn *lrp)
1479{
1480 struct svc_fh *current_fh = &cstate->current_fh;
1481 __be32 nfserr;
1482
1483 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1484 if (nfserr)
1485 goto out;
1486
1487 nfserr = nfserr_layoutunavailable;
1488 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1489 goto out;
1490
1491 switch (lrp->lr_seg.iomode) {
1492 case IOMODE_READ:
1493 case IOMODE_RW:
1494 case IOMODE_ANY:
1495 break;
1496 default:
1497 dprintk("%s: invalid iomode %d\n", __func__,
1498 lrp->lr_seg.iomode);
1499 nfserr = nfserr_inval;
1500 goto out;
1501 }
1502
1503 switch (lrp->lr_return_type) {
1504 case RETURN_FILE:
1505 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1506 break;
1507 case RETURN_FSID:
1508 case RETURN_ALL:
1509 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1510 break;
1511 default:
1512 dprintk("%s: invalid return_type %d\n", __func__,
1513 lrp->lr_return_type);
1514 nfserr = nfserr_inval;
1515 break;
1516 }
1517out:
1518 return nfserr;
1519}
1520#endif /* CONFIG_NFSD_PNFS */
1521
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522/*
1523 * NULL call.
1524 */
Al Viro7111c662006-10-19 23:28:45 -07001525static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1527{
1528 return nfs_ok;
1529}
1530
Shankar Anande2b20952006-07-10 04:45:44 -07001531static inline void nfsd4_increment_op_stats(u32 opnum)
1532{
1533 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1534 nfsdstats.nfs4_opcount[opnum]++;
1535}
1536
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001537typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1538 void *);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001539typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01001540typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1541typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001542
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001543enum nfsd4_op_flags {
1544 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
Mi Jinlong5ece3ca2011-02-18 09:08:31 +08001545 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1546 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
J. Bruce Fields68d93182011-04-08 17:00:50 -04001547 /* For rfc 5661 section 2.6.3.1.1: */
1548 OP_HANDLES_WRONGSEC = 1 << 3,
1549 OP_IS_PUTFH_LIKE = 1 << 4,
J. Bruce Fields10910062011-01-24 12:11:02 -05001550 /*
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04001551 * These are the ops whose result size we estimate before
1552 * encoding, to avoid performing an op then not being able to
1553 * respond or cache a response. This includes writes and setattrs
1554 * as well as the operations usually called "nonidempotent":
1555 */
1556 OP_MODIFIES_SOMETHING = 1 << 5,
1557 /*
1558 * Cache compounds containing these ops in the xid-based drc:
J. Bruce Fields10910062011-01-24 12:11:02 -05001559 * We use the DRC for compounds containing non-idempotent
1560 * operations, *except* those that are 4.1-specific (since
1561 * sessions provide their own EOS), and except for stateful
1562 * operations other than setclientid and setclientid_confirm
1563 * (since sequence numbers provide EOS for open, lock, etc in
1564 * the v4.0 case).
1565 */
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04001566 OP_CACHEME = 1 << 6,
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01001567 /*
1568 * These are ops which clear current state id.
1569 */
1570 OP_CLEAR_STATEID = 1 << 7,
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04001571};
1572
1573struct nfsd4_operation {
1574 nfsd4op_func op_func;
1575 u32 op_flags;
1576 char *op_name;
Mi Jinlong58e7b332011-08-28 18:18:56 +08001577 /* Try to get response size before operation */
1578 nfsd4op_rsize op_rsize_bop;
Bryan Schumaker24ff99c2012-08-14 15:55:08 -04001579 stateid_getter op_get_currentstateid;
1580 stateid_setter op_set_currentstateid;
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001581};
1582
1583static struct nfsd4_operation nfsd4_ops[];
1584
Adrian Bunkf1c7f792008-08-08 19:26:42 +03001585static const char *nfsd4_op_name(unsigned opnum);
Benny Halevyb001a1b2008-07-02 11:15:03 +03001586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587/*
J. Bruce Fields57716352010-04-21 12:27:19 -04001588 * Enforce NFSv4.1 COMPOUND ordering rules:
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001589 *
J. Bruce Fields57716352010-04-21 12:27:19 -04001590 * Also note, enforced elsewhere:
1591 * - SEQUENCE other than as first op results in
1592 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001593 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1594 * (Enforced in nfsd4_bind_conn_to_session().)
J. Bruce Fields57716352010-04-21 12:27:19 -04001595 * - DESTROY_SESSION must be the final operation in a compound, if
1596 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1597 * (Enforced in nfsd4_destroy_session().)
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001598 */
J. Bruce Fields57716352010-04-21 12:27:19 -04001599static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001600{
J. Bruce Fields57716352010-04-21 12:27:19 -04001601 struct nfsd4_op *op = &args->ops[0];
1602
1603 /* These ordering requirements don't apply to NFSv4.0: */
1604 if (args->minorversion == 0)
1605 return nfs_ok;
1606 /* This is weird, but OK, not our problem: */
1607 if (args->opcnt == 0)
1608 return nfs_ok;
1609 if (op->status == nfserr_op_illegal)
1610 return nfs_ok;
1611 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1612 return nfserr_op_not_in_session;
1613 if (op->opnum == OP_SEQUENCE)
1614 return nfs_ok;
1615 if (args->opcnt != 1)
1616 return nfserr_not_only_op;
1617 return nfs_ok;
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001618}
1619
J. Bruce Fields22b03212011-04-09 11:23:24 -04001620static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1621{
1622 return &nfsd4_ops[op->opnum];
1623}
1624
J. Bruce Fields10910062011-01-24 12:11:02 -05001625bool nfsd4_cache_this_op(struct nfsd4_op *op)
1626{
J. Bruce Fieldse372ba62014-05-19 12:27:11 -04001627 if (op->opnum == OP_ILLEGAL)
1628 return false;
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04001629 return OPDESC(op)->op_flags & OP_CACHEME;
J. Bruce Fields10910062011-01-24 12:11:02 -05001630}
1631
J. Bruce Fields68d93182011-04-08 17:00:50 -04001632static bool need_wrongsec_check(struct svc_rqst *rqstp)
1633{
1634 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1635 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1636 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1637 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1638 struct nfsd4_operation *thisd;
1639 struct nfsd4_operation *nextd;
1640
1641 thisd = OPDESC(this);
1642 /*
1643 * Most ops check wronsec on our own; only the putfh-like ops
1644 * have special rules.
1645 */
1646 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1647 return false;
1648 /*
1649 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1650 * put-filehandle operation if we're not going to use the
1651 * result:
1652 */
1653 if (argp->opcnt == resp->opcnt)
1654 return false;
J. Bruce Fields51904b02014-10-22 14:46:29 -04001655 if (next->opnum == OP_ILLEGAL)
1656 return false;
J. Bruce Fields68d93182011-04-08 17:00:50 -04001657 nextd = OPDESC(next);
1658 /*
1659 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1660 * errors themselves as necessary; others should check for them
1661 * now:
1662 */
1663 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1664}
1665
J. Bruce Fields2d124dfaa2014-01-15 16:26:42 -05001666static void svcxdr_init_encode(struct svc_rqst *rqstp,
1667 struct nfsd4_compoundres *resp)
1668{
1669 struct xdr_stream *xdr = &resp->xdr;
1670 struct xdr_buf *buf = &rqstp->rq_res;
1671 struct kvec *head = buf->head;
1672
1673 xdr->buf = buf;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001674 xdr->iov = head;
J. Bruce Fields2d124dfaa2014-01-15 16:26:42 -05001675 xdr->p = head->iov_base + head->iov_len;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001676 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
J. Bruce Fields6ac90392014-02-26 17:39:35 -05001677 /* Tail and page_len should be zero at this point: */
1678 buf->len = buf->head[0].iov_len;
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04001679 xdr->scratch.iov_len = 0;
J. Bruce Fields05638dc2014-06-02 12:05:47 -04001680 xdr->page_ptr = buf->pages - 1;
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04001681 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001682 - rqstp->rq_auth_slack;
J. Bruce Fields2d124dfaa2014-01-15 16:26:42 -05001683}
1684
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001685/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 * COMPOUND call.
1687 */
Al Viro7111c662006-10-19 23:28:45 -07001688static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689nfsd4_proc_compound(struct svc_rqst *rqstp,
1690 struct nfsd4_compoundargs *args,
1691 struct nfsd4_compoundres *resp)
1692{
1693 struct nfsd4_op *op;
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001694 struct nfsd4_operation *opdesc;
Andy Adamsone354d572009-03-28 11:30:52 +03001695 struct nfsd4_compound_state *cstate = &resp->cstate;
Kinglong Mee4daeed22014-03-26 17:10:37 +08001696 struct svc_fh *current_fh = &cstate->current_fh;
1697 struct svc_fh *save_fh = &cstate->save_fh;
Al Virob37ad282006-10-19 23:28:59 -07001698 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699
J. Bruce Fields2d124dfaa2014-01-15 16:26:42 -05001700 svcxdr_init_encode(rqstp, resp);
J. Bruce Fields4aea24b2014-01-15 15:17:58 -05001701 resp->tagp = resp->xdr.p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 /* reserve space for: taglen, tag, and opcnt */
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05001703 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 resp->taglen = args->taglen;
1705 resp->tag = args->tag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 resp->rqstp = rqstp;
Kinglong Mee4daeed22014-03-26 17:10:37 +08001707 cstate->minorversion = args->minorversion;
Kinglong Mee4daeed22014-03-26 17:10:37 +08001708 fh_init(current_fh, NFS4_FHSIZE);
1709 fh_init(save_fh, NFS4_FHSIZE);
NeilBrown8ff30fa2010-08-12 17:04:07 +10001710 /*
1711 * Don't use the deferral mechanism for NFSv4; compounds make it
1712 * too hard to avoid non-idempotency problems.
1713 */
Jeff Layton30660e04b2014-11-19 07:51:16 -05001714 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715
1716 /*
1717 * According to RFC3010, this takes precedence over all other errors.
1718 */
1719 status = nfserr_minor_vers_mismatch;
J. Bruce Fields35f7a142013-07-08 19:51:44 -04001720 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 goto out;
1722
J. Bruce Fields57716352010-04-21 12:27:19 -04001723 status = nfs41_check_op_ordering(args);
1724 if (status) {
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001725 op = &args->ops[0];
J. Bruce Fields57716352010-04-21 12:27:19 -04001726 op->status = status;
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001727 goto encode_op;
1728 }
1729
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 while (!status && resp->opcnt < args->opcnt) {
1731 op = &args->ops[resp->opcnt++];
1732
Benny Halevyb001a1b2008-07-02 11:15:03 +03001733 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1734 resp->opcnt, args->opcnt, op->opnum,
1735 nfsd4_op_name(op->opnum));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 /*
1737 * The XDR decode routines may have pre-set op->status;
1738 * for example, if there is a miscellaneous XDR error
1739 * it will be set to nfserr_bad_xdr.
1740 */
J. Bruce Fields9d313b12013-02-28 12:51:49 -08001741 if (op->status) {
1742 if (op->opnum == OP_OPEN)
1743 op->status = nfsd4_open_omfg(rqstp, cstate, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 goto encode_op;
J. Bruce Fields9d313b12013-02-28 12:51:49 -08001745 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746
J. Bruce Fields22b03212011-04-09 11:23:24 -04001747 opdesc = OPDESC(op);
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001748
Kinglong Mee4daeed22014-03-26 17:10:37 +08001749 if (!current_fh->fh_dentry) {
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001750 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001751 op->status = nfserr_nofilehandle;
1752 goto encode_op;
1753 }
Kinglong Mee4daeed22014-03-26 17:10:37 +08001754 } else if (current_fh->fh_export->ex_fslocs.migrated &&
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08001755 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001756 op->status = nfserr_moved;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 goto encode_op;
1758 }
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001759
Kinglong Mee23367452014-03-29 10:23:47 +08001760 fh_clear_wcc(current_fh);
1761
Mi Jinlong58e7b332011-08-28 18:18:56 +08001762 /* If op is non-idempotent */
1763 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
J. Bruce Fields4c69d582014-01-28 16:01:04 -05001764 /*
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04001765 * Don't execute this op if we couldn't encode a
1766 * succesful reply:
1767 */
1768 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1769 /*
1770 * Plus if there's another operation, make sure
J. Bruce Fields4c69d582014-01-28 16:01:04 -05001771 * we'll have space to at least encode an error:
1772 */
1773 if (resp->opcnt < args->opcnt)
1774 plen += COMPOUND_ERR_SLACK_SPACE;
Mi Jinlong58e7b332011-08-28 18:18:56 +08001775 op->status = nfsd4_check_resp_size(resp, plen);
1776 }
1777
1778 if (op->status)
1779 goto encode_op;
1780
J. Bruce Fieldsb600de72013-02-28 11:55:46 -08001781 if (opdesc->op_get_currentstateid)
1782 opdesc->op_get_currentstateid(cstate, &op->u);
1783 op->status = opdesc->op_func(rqstp, cstate, &op->u);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01001785 if (!op->status) {
1786 if (opdesc->op_set_currentstateid)
1787 opdesc->op_set_currentstateid(cstate, &op->u);
1788
1789 if (opdesc->op_flags & OP_CLEAR_STATEID)
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01001790 clear_current_stateid(cstate);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01001791
1792 if (need_wrongsec_check(rqstp))
Kinglong Mee4daeed22014-03-26 17:10:37 +08001793 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01001794 }
J. Bruce Fields68d93182011-04-08 17:00:50 -04001795
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796encode_op:
Andy Adamson49557cc2009-07-23 19:02:16 -04001797 /* Only from SEQUENCE */
Kinglong Mee4daeed22014-03-26 17:10:37 +08001798 if (cstate->status == nfserr_replay_cache) {
Andy Adamsonda3846a2009-04-03 08:28:22 +03001799 dprintk("%s NFS4.1 replay from cache\n", __func__);
Andy Adamsonabfabf82009-07-23 19:02:18 -04001800 status = op->status;
Andy Adamsonda3846a2009-04-03 08:28:22 +03001801 goto out;
1802 }
Al Viroa90b0612006-10-19 23:29:03 -07001803 if (op->status == nfserr_replay_me) {
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08001804 op->replay = &cstate->replay_owner->so_replay;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05001805 nfsd4_encode_replay(&resp->xdr, op);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 status = op->status = op->replay->rp_status;
1807 } else {
1808 nfsd4_encode_operation(resp, op);
1809 status = op->status;
1810 }
Benny Halevy04077172008-12-15 19:40:49 +02001811
1812 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1813 args->ops, args->opcnt, resp->opcnt, op->opnum,
1814 be32_to_cpu(status));
1815
Jeff Layton58fb12e2014-07-29 21:34:27 -04001816 nfsd4_cstate_clear_replay(cstate);
Shankar Anande2b20952006-07-10 04:45:44 -07001817 nfsd4_increment_op_stats(op->opnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 }
1819
Kinglong Mee4daeed22014-03-26 17:10:37 +08001820 cstate->status = status;
1821 fh_put(current_fh);
1822 fh_put(save_fh);
1823 BUG_ON(cstate->replay_owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824out:
Andy Adamson2f425872009-04-03 08:27:32 +03001825 /* Reset deferral mechanism for RPC deferrals */
Jeff Layton30660e04b2014-11-19 07:51:16 -05001826 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
J. Bruce Fields3b12cd92008-05-05 17:17:44 -04001827 dprintk("nfsv4 compound returned %d\n", ntohl(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 return status;
1829}
1830
Mi Jinlong58e7b332011-08-28 18:18:56 +08001831#define op_encode_hdr_size (2)
1832#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1833#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1834#define op_encode_change_info_maxsz (5)
1835#define nfs4_fattr_bitmap_maxsz (4)
1836
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04001837/* We'll fall back on returning no lockowner if run out of space: */
1838#define op_encode_lockowner_maxsz (0)
Mi Jinlong58e7b332011-08-28 18:18:56 +08001839#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1840
1841#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1842
1843#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1844#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1845 op_encode_ace_maxsz)
1846
1847#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1848
1849static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1850{
1851 return (op_encode_hdr_size) * sizeof(__be32);
1852}
1853
1854static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1855{
1856 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1857}
1858
1859static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1860{
1861 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1862}
1863
1864static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1865{
1866 return (op_encode_hdr_size + op_encode_change_info_maxsz
1867 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1868}
1869
J. Bruce Fieldsb86cef62014-03-23 12:01:48 -04001870/*
1871 * Note since this is an idempotent operation we won't insist on failing
1872 * the op prematurely if the estimate is too large. We may turn off splice
1873 * reads unnecessarily.
1874 */
1875static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1876 struct nfsd4_op *op)
1877{
1878 u32 *bmap = op->u.getattr.ga_bmval;
1879 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1880 u32 ret = 0;
1881
1882 if (bmap0 & FATTR4_WORD0_ACL)
1883 return svc_max_payload(rqstp);
1884 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1885 return svc_max_payload(rqstp);
1886
1887 if (bmap1 & FATTR4_WORD1_OWNER) {
1888 ret += IDMAP_NAMESZ + 4;
1889 bmap1 &= ~FATTR4_WORD1_OWNER;
1890 }
1891 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1892 ret += IDMAP_NAMESZ + 4;
1893 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1894 }
1895 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1896 ret += NFS4_FHSIZE + 4;
1897 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1898 }
1899 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
Kinglong Mee1ec8c0c2015-03-28 23:46:09 +08001900 ret += NFS4_MAXLABELLEN + 12;
J. Bruce Fieldsb86cef62014-03-23 12:01:48 -04001901 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1902 }
1903 /*
1904 * Largest of remaining attributes are 16 bytes (e.g.,
1905 * supported_attributes)
1906 */
1907 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1908 /* bitmask, length */
1909 ret += 20;
1910 return ret;
1911}
1912
Mi Jinlong58e7b332011-08-28 18:18:56 +08001913static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1914{
1915 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1916 * sizeof(__be32);
1917}
1918
1919static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1920{
1921 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1922 * sizeof(__be32);
1923}
1924
1925static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1926{
1927 return (op_encode_hdr_size + op_encode_stateid_maxsz
1928 + op_encode_change_info_maxsz + 1
1929 + nfs4_fattr_bitmap_maxsz
1930 + op_encode_delegation_maxsz) * sizeof(__be32);
1931}
1932
1933static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1934{
1935 u32 maxcount = 0, rlen = 0;
1936
1937 maxcount = svc_max_payload(rqstp);
Kinglong Mee3c7aa152014-06-10 18:08:19 +08001938 rlen = min(op->u.read.rd_length, maxcount);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001939
J. Bruce Fields622f5602014-05-16 14:38:20 -04001940 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001941}
1942
1943static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1944{
Kinglong Mee3c7aa152014-06-10 18:08:19 +08001945 u32 maxcount = 0, rlen = 0;
Mi Jinlong58e7b332011-08-28 18:18:56 +08001946
Kinglong Mee3c7aa152014-06-10 18:08:19 +08001947 maxcount = svc_max_payload(rqstp);
1948 rlen = min(op->u.readdir.rd_maxcount, maxcount);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001949
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05001950 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1951 XDR_QUADLEN(rlen)) * sizeof(__be32);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001952}
1953
1954static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1955{
1956 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1957 * sizeof(__be32);
1958}
1959
1960static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961{
1962 return (op_encode_hdr_size + op_encode_change_info_maxsz
1963 + op_encode_change_info_maxsz) * sizeof(__be32);
1964}
1965
J. Bruce Fieldsccae70a2014-03-23 09:34:22 -07001966static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1967 struct nfsd4_op *op)
1968{
J. Bruce Fieldsd1d84c92014-08-21 15:04:31 -04001969 return (op_encode_hdr_size
1970 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
J. Bruce Fieldsccae70a2014-03-23 09:34:22 -07001971}
1972
Mi Jinlong58e7b332011-08-28 18:18:56 +08001973static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1974{
1975 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1976}
1977
1978static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1979{
J. Bruce Fields480efae2014-03-10 14:17:55 -04001980 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1981 sizeof(__be32);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001982}
1983
1984static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1985{
J. Bruce Fieldsf34e4322014-05-16 21:24:56 -04001986 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
Mi Jinlong58e7b332011-08-28 18:18:56 +08001987}
1988
1989static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1990{
1991 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
Kinglong Meea8bb84b2013-12-10 15:24:36 +08001992 1 + 1 + /* eir_flags, spr_how */\
1993 4 + /* spo_must_enforce & _allow with bitmap */\
Mi Jinlong58e7b332011-08-28 18:18:56 +08001994 2 + /*eir_server_owner.so_minor_id */\
1995 /* eir_server_owner.so_major_id<> */\
1996 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1997 /* eir_server_scope<> */\
1998 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1999 1 + /* eir_server_impl_id array length */\
2000 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2001}
2002
2003static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2004{
2005 return (op_encode_hdr_size + \
2006 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2007 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2008}
2009
2010static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2011{
2012 return (op_encode_hdr_size + \
2013 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2014 2 + /* csr_sequence, csr_flags */\
2015 op_encode_channel_attrs_maxsz + \
2016 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2017}
2018
Anna Schumaker29ae7f92016-09-07 15:57:30 -04002019static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size +
2022 1 /* wr_callback */ +
2023 op_encode_stateid_maxsz /* wr_callback */ +
2024 2 /* wr_count */ +
2025 1 /* wr_committed */ +
2026 op_encode_verifier_maxsz +
2027 1 /* cr_consecutive */ +
2028 1 /* cr_synchronous */) * sizeof(__be32);
2029}
2030
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002031#ifdef CONFIG_NFSD_PNFS
2032/*
2033 * At this stage we don't really know what layout driver will handle the request,
2034 * so we need to define an arbitrary upper bound here.
2035 */
2036#define MAX_LAYOUT_SIZE 128
2037static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2038{
2039 return (op_encode_hdr_size +
2040 1 /* logr_return_on_close */ +
2041 op_encode_stateid_maxsz +
2042 1 /* nr of layouts */ +
2043 MAX_LAYOUT_SIZE) * sizeof(__be32);
2044}
2045
2046static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2047{
2048 return (op_encode_hdr_size +
2049 1 /* locr_newsize */ +
2050 2 /* ns_size */) * sizeof(__be32);
2051}
2052
2053static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2054{
2055 return (op_encode_hdr_size +
2056 1 /* lrs_stateid */ +
2057 op_encode_stateid_maxsz) * sizeof(__be32);
2058}
2059#endif /* CONFIG_NFSD_PNFS */
2060
Benny Halevy20766012009-03-28 11:32:05 +03002061static struct nfsd4_operation nfsd4_ops[] = {
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002062 [OP_ACCESS] = {
2063 .op_func = (nfsd4op_func)nfsd4_access,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002064 .op_name = "OP_ACCESS",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002065 },
2066 [OP_CLOSE] = {
2067 .op_func = (nfsd4op_func)nfsd4_close,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002068 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002069 .op_name = "OP_CLOSE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002070 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01002071 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2072 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002073 },
2074 [OP_COMMIT] = {
2075 .op_func = (nfsd4op_func)nfsd4_commit,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002076 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002077 .op_name = "OP_COMMIT",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002078 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002079 },
2080 [OP_CREATE] = {
2081 .op_func = (nfsd4op_func)nfsd4_create,
Tigran Mkrtchyand1471052012-02-13 22:55:29 +01002082 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002083 .op_name = "OP_CREATE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002085 },
2086 [OP_DELEGRETURN] = {
2087 .op_func = (nfsd4op_func)nfsd4_delegreturn,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002088 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002089 .op_name = "OP_DELEGRETURN",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002090 .op_rsize_bop = nfsd4_only_status_rsize,
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01002091 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002092 },
2093 [OP_GETATTR] = {
2094 .op_func = (nfsd4op_func)nfsd4_getattr,
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08002095 .op_flags = ALLOWED_ON_ABSENT_FS,
J. Bruce Fieldsb86cef62014-03-23 12:01:48 -04002096 .op_rsize_bop = nfsd4_getattr_rsize,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002097 .op_name = "OP_GETATTR",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002098 },
2099 [OP_GETFH] = {
2100 .op_func = (nfsd4op_func)nfsd4_getfh,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002101 .op_name = "OP_GETFH",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002102 },
2103 [OP_LINK] = {
2104 .op_func = (nfsd4op_func)nfsd4_link,
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002105 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2106 | OP_CACHEME,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002107 .op_name = "OP_LINK",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002108 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002109 },
2110 [OP_LOCK] = {
2111 .op_func = (nfsd4op_func)nfsd4_lock,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002112 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002113 .op_name = "OP_LOCK",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01002115 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002116 },
2117 [OP_LOCKT] = {
2118 .op_func = (nfsd4op_func)nfsd4_lockt,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002119 .op_name = "OP_LOCKT",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002120 },
2121 [OP_LOCKU] = {
2122 .op_func = (nfsd4op_func)nfsd4_locku,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002123 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002124 .op_name = "OP_LOCKU",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002125 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01002126 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002127 },
2128 [OP_LOOKUP] = {
2129 .op_func = (nfsd4op_func)nfsd4_lookup,
Tigran Mkrtchyand1471052012-02-13 22:55:29 +01002130 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002131 .op_name = "OP_LOOKUP",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002132 },
2133 [OP_LOOKUPP] = {
2134 .op_func = (nfsd4op_func)nfsd4_lookupp,
Tigran Mkrtchyand1471052012-02-13 22:55:29 +01002135 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002136 .op_name = "OP_LOOKUPP",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002137 },
2138 [OP_NVERIFY] = {
2139 .op_func = (nfsd4op_func)nfsd4_nverify,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002140 .op_name = "OP_NVERIFY",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002141 },
2142 [OP_OPEN] = {
2143 .op_func = (nfsd4op_func)nfsd4_open,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002144 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002145 .op_name = "OP_OPEN",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002146 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01002147 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002148 },
2149 [OP_OPEN_CONFIRM] = {
2150 .op_func = (nfsd4op_func)nfsd4_open_confirm,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002151 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002152 .op_name = "OP_OPEN_CONFIRM",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002153 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002154 },
2155 [OP_OPEN_DOWNGRADE] = {
2156 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002157 .op_flags = OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002158 .op_name = "OP_OPEN_DOWNGRADE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002159 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01002160 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2161 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002162 },
2163 [OP_PUTFH] = {
2164 .op_func = (nfsd4op_func)nfsd4_putfh,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002165 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
J. Bruce Fields5b648692014-03-07 11:43:58 -05002166 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002167 .op_name = "OP_PUTFH",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002168 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002169 },
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08002170 [OP_PUTPUBFH] = {
J. Bruce Fieldsa1c8c4d2009-03-09 12:17:29 -04002171 .op_func = (nfsd4op_func)nfsd4_putrootfh,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002172 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
J. Bruce Fields5b648692014-03-07 11:43:58 -05002173 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002174 .op_name = "OP_PUTPUBFH",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08002176 },
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002177 [OP_PUTROOTFH] = {
2178 .op_func = (nfsd4op_func)nfsd4_putrootfh,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002179 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
J. Bruce Fields5b648692014-03-07 11:43:58 -05002180 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002181 .op_name = "OP_PUTROOTFH",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002182 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002183 },
2184 [OP_READ] = {
2185 .op_func = (nfsd4op_func)nfsd4_read,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002186 .op_name = "OP_READ",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01002188 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002189 },
2190 [OP_READDIR] = {
2191 .op_func = (nfsd4op_func)nfsd4_readdir,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002192 .op_name = "OP_READDIR",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002194 },
2195 [OP_READLINK] = {
2196 .op_func = (nfsd4op_func)nfsd4_readlink,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002197 .op_name = "OP_READLINK",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002198 },
2199 [OP_REMOVE] = {
2200 .op_func = (nfsd4op_func)nfsd4_remove,
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002201 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002202 .op_name = "OP_REMOVE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002203 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002204 },
2205 [OP_RENAME] = {
2206 .op_func = (nfsd4op_func)nfsd4_rename,
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002207 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002208 .op_name = "OP_RENAME",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002210 },
2211 [OP_RENEW] = {
2212 .op_func = (nfsd4op_func)nfsd4_renew,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2214 | OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002215 .op_name = "OP_RENEW",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2217
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002218 },
2219 [OP_RESTOREFH] = {
2220 .op_func = (nfsd4op_func)nfsd4_restorefh,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002221 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
Mi Jinlong58e7b332011-08-28 18:18:56 +08002222 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002223 .op_name = "OP_RESTOREFH",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002224 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002225 },
2226 [OP_SAVEFH] = {
2227 .op_func = (nfsd4op_func)nfsd4_savefh,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002228 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002229 .op_name = "OP_SAVEFH",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002230 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002231 },
Andy Adamsondcb488a32007-07-17 04:04:51 -07002232 [OP_SECINFO] = {
2233 .op_func = (nfsd4op_func)nfsd4_secinfo,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002234 .op_flags = OP_HANDLES_WRONGSEC,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002235 .op_name = "OP_SECINFO",
Andy Adamsondcb488a32007-07-17 04:04:51 -07002236 },
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002237 [OP_SETATTR] = {
2238 .op_func = (nfsd4op_func)nfsd4_setattr,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002239 .op_name = "OP_SETATTR",
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002240 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002241 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01002242 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002243 },
2244 [OP_SETCLIENTID] = {
2245 .op_func = (nfsd4op_func)nfsd4_setclientid,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002246 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002247 | OP_MODIFIES_SOMETHING | OP_CACHEME,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002248 .op_name = "OP_SETCLIENTID",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002250 },
2251 [OP_SETCLIENTID_CONFIRM] = {
2252 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002254 | OP_MODIFIES_SOMETHING | OP_CACHEME,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002255 .op_name = "OP_SETCLIENTID_CONFIRM",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002256 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002257 },
2258 [OP_VERIFY] = {
2259 .op_func = (nfsd4op_func)nfsd4_verify,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002260 .op_name = "OP_VERIFY",
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002261 },
2262 [OP_WRITE] = {
2263 .op_func = (nfsd4op_func)nfsd4_write,
J. Bruce Fieldsc8566942011-09-20 08:49:51 -04002264 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002265 .op_name = "OP_WRITE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002266 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01002267 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002268 },
2269 [OP_RELEASE_LOCKOWNER] = {
2270 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002271 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2272 | OP_MODIFIES_SOMETHING,
Benny Halevyb001a1b2008-07-02 11:15:03 +03002273 .op_name = "OP_RELEASE_LOCKOWNER",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002274 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002275 },
Andy Adamson069b6ad2009-04-03 08:27:58 +03002276
2277 /* NFSv4.1 operations */
2278 [OP_EXCHANGE_ID] = {
2279 .op_func = (nfsd4op_func)nfsd4_exchange_id,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002280 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2281 | OP_MODIFIES_SOMETHING,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002282 .op_name = "OP_EXCHANGE_ID",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002283 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002284 },
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002285 [OP_BACKCHANNEL_CTL] = {
2286 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2287 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2288 .op_name = "OP_BACKCHANNEL_CTL",
2289 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2290 },
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002291 [OP_BIND_CONN_TO_SESSION] = {
2292 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002293 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2294 | OP_MODIFIES_SOMETHING,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002295 .op_name = "OP_BIND_CONN_TO_SESSION",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002296 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002297 },
Andy Adamson069b6ad2009-04-03 08:27:58 +03002298 [OP_CREATE_SESSION] = {
2299 .op_func = (nfsd4op_func)nfsd4_create_session,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2301 | OP_MODIFIES_SOMETHING,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002302 .op_name = "OP_CREATE_SESSION",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002304 },
2305 [OP_DESTROY_SESSION] = {
2306 .op_func = (nfsd4op_func)nfsd4_destroy_session,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002307 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2308 | OP_MODIFIES_SOMETHING,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002309 .op_name = "OP_DESTROY_SESSION",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002310 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002311 },
2312 [OP_SEQUENCE] = {
2313 .op_func = (nfsd4op_func)nfsd4_sequence,
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002315 .op_name = "OP_SEQUENCE",
J. Bruce Fieldsd1d84c92014-08-21 15:04:31 -04002316 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002317 },
Benny Halevy094b5d72011-06-16 11:39:10 -04002318 [OP_DESTROY_CLIENTID] = {
Mi Jinlong345c2842011-10-20 17:51:39 +08002319 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002320 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2321 | OP_MODIFIES_SOMETHING,
Benny Halevy094b5d72011-06-16 11:39:10 -04002322 .op_name = "OP_DESTROY_CLIENTID",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002323 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
Benny Halevy094b5d72011-06-16 11:39:10 -04002324 },
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002325 [OP_RECLAIM_COMPLETE] = {
2326 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002327 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002328 .op_name = "OP_RECLAIM_COMPLETE",
Mi Jinlong58e7b332011-08-28 18:18:56 +08002329 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002330 },
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05002331 [OP_SECINFO_NO_NAME] = {
2332 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
J. Bruce Fields68d93182011-04-08 17:00:50 -04002333 .op_flags = OP_HANDLES_WRONGSEC,
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05002334 .op_name = "OP_SECINFO_NO_NAME",
2335 },
Bryan Schumaker17456802011-07-13 10:50:48 -04002336 [OP_TEST_STATEID] = {
2337 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2338 .op_flags = ALLOWED_WITHOUT_FH,
2339 .op_name = "OP_TEST_STATEID",
2340 },
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04002341 [OP_FREE_STATEID] = {
2342 .op_func = (nfsd4op_func)nfsd4_free_stateid,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002343 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04002344 .op_name = "OP_FREE_STATEID",
J. Bruce Fieldsa1dc6952012-12-17 18:17:13 -05002345 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
Mi Jinlong58e7b332011-08-28 18:18:56 +08002346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04002347 },
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002348#ifdef CONFIG_NFSD_PNFS
2349 [OP_GETDEVICEINFO] = {
2350 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2351 .op_flags = ALLOWED_WITHOUT_FH,
2352 .op_name = "OP_GETDEVICEINFO",
2353 },
2354 [OP_LAYOUTGET] = {
2355 .op_func = (nfsd4op_func)nfsd4_layoutget,
2356 .op_flags = OP_MODIFIES_SOMETHING,
2357 .op_name = "OP_LAYOUTGET",
2358 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2359 },
2360 [OP_LAYOUTCOMMIT] = {
2361 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2362 .op_flags = OP_MODIFIES_SOMETHING,
2363 .op_name = "OP_LAYOUTCOMMIT",
2364 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2365 },
2366 [OP_LAYOUTRETURN] = {
2367 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2368 .op_flags = OP_MODIFIES_SOMETHING,
2369 .op_name = "OP_LAYOUTRETURN",
2370 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2371 },
2372#endif /* CONFIG_NFSD_PNFS */
Anna Schumaker24bab492014-09-26 13:58:27 -04002373
2374 /* NFSv4.2 operations */
Anna Schumaker95d871f2014-11-07 14:44:26 -05002375 [OP_ALLOCATE] = {
2376 .op_func = (nfsd4op_func)nfsd4_allocate,
2377 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2378 .op_name = "OP_ALLOCATE",
Kinglong Meebeaca232015-03-15 23:35:11 +08002379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
Anna Schumaker95d871f2014-11-07 14:44:26 -05002380 },
Anna Schumakerb0cb9082014-11-07 14:44:27 -05002381 [OP_DEALLOCATE] = {
2382 .op_func = (nfsd4op_func)nfsd4_deallocate,
2383 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2384 .op_name = "OP_DEALLOCATE",
Kinglong Meebeaca232015-03-15 23:35:11 +08002385 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
Anna Schumakerb0cb9082014-11-07 14:44:27 -05002386 },
Christoph Hellwigffa01602015-12-03 12:59:52 +01002387 [OP_CLONE] = {
2388 .op_func = (nfsd4op_func)nfsd4_clone,
2389 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2390 .op_name = "OP_CLONE",
2391 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2392 },
Anna Schumaker29ae7f92016-09-07 15:57:30 -04002393 [OP_COPY] = {
2394 .op_func = (nfsd4op_func)nfsd4_copy,
2395 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2396 .op_name = "OP_COPY",
2397 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2398 },
Anna Schumaker24bab492014-09-26 13:58:27 -04002399 [OP_SEEK] = {
2400 .op_func = (nfsd4op_func)nfsd4_seek,
2401 .op_name = "OP_SEEK",
2402 },
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002403};
2404
Andrew Elbleed941642016-06-15 12:52:09 -04002405/**
2406 * nfsd4_spo_must_allow - Determine if the compound op contains an
2407 * operation that is allowed to be sent with machine credentials
2408 *
2409 * @rqstp: a pointer to the struct svc_rqst
2410 *
2411 * Checks to see if the compound contains a spo_must_allow op
2412 * and confirms that it was sent with the proper machine creds.
2413 */
2414
2415bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2416{
2417 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2418 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2419 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2420 struct nfsd4_compound_state *cstate = &resp->cstate;
2421 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2422 u32 opiter;
2423
2424 if (!cstate->minorversion)
2425 return false;
2426
2427 if (cstate->spo_must_allowed == true)
2428 return true;
2429
2430 opiter = resp->opcnt;
2431 while (opiter < argp->opcnt) {
2432 this = &argp->ops[opiter++];
2433 if (test_bit(this->opnum, allow->u.longs) &&
2434 cstate->clp->cl_mach_cred &&
2435 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2436 cstate->spo_must_allowed = true;
2437 return true;
2438 }
2439 }
2440 cstate->spo_must_allowed = false;
2441 return false;
2442}
2443
J. Bruce Fields4f0cefb2014-03-11 15:39:13 -04002444int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2445{
2446 struct nfsd4_operation *opdesc;
2447 nfsd4op_rsize estimator;
2448
2449 if (op->opnum == OP_ILLEGAL)
2450 return op_encode_hdr_size * sizeof(__be32);
2451 opdesc = OPDESC(op);
2452 estimator = opdesc->op_rsize_bop;
2453 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2454}
2455
J. Bruce Fields07d1f802014-03-06 20:39:29 -05002456void warn_on_nonidempotent_op(struct nfsd4_op *op)
2457{
2458 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2459 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2460 op->opnum, nfsd4_op_name(op->opnum));
2461 WARN_ON_ONCE(1);
2462 }
2463}
2464
Adrian Bunkf1c7f792008-08-08 19:26:42 +03002465static const char *nfsd4_op_name(unsigned opnum)
Benny Halevyb001a1b2008-07-02 11:15:03 +03002466{
2467 if (opnum < ARRAY_SIZE(nfsd4_ops))
2468 return nfsd4_ops[opnum].op_name;
2469 return "unknown_operation";
2470}
2471
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472#define nfsd4_voidres nfsd4_voidargs
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473struct nfsd4_voidargs { int dummy; };
2474
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475static struct svc_procedure nfsd_procedures4[2] = {
Yu Zhiguo0a93a472009-05-19 14:09:54 +08002476 [NFSPROC4_NULL] = {
2477 .pc_func = (svc_procfunc) nfsd4_proc_null,
2478 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2479 .pc_argsize = sizeof(struct nfsd4_voidargs),
2480 .pc_ressize = sizeof(struct nfsd4_voidres),
2481 .pc_cachetype = RC_NOCACHE,
2482 .pc_xdrressize = 1,
2483 },
2484 [NFSPROC4_COMPOUND] = {
2485 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2486 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2487 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2488 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2489 .pc_ressize = sizeof(struct nfsd4_compoundres),
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04002490 .pc_release = nfsd4_release_compoundargs,
Yu Zhiguo0a93a472009-05-19 14:09:54 +08002491 .pc_cachetype = RC_NOCACHE,
2492 .pc_xdrressize = NFSD_BUFSIZE/4,
2493 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494};
2495
2496struct svc_version nfsd_version4 = {
2497 .vs_vers = 4,
2498 .vs_nproc = 2,
2499 .vs_proc = nfsd_procedures4,
2500 .vs_dispatch = nfsd_dispatch,
2501 .vs_xdrsize = NFS4_SVC_XDRSIZE,
Kinglong Mee7e55b592013-12-31 13:17:20 +08002502 .vs_rpcb_optnl = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503};
2504
2505/*
2506 * Local variables:
2507 * c-basic-offset: 8
2508 * End:
2509 */