blob: a204d7e109d4d63a76d01a31198b00f3f1cd09be [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002* Copyright (c) 2001 The Regents of the University of Michigan.
3* All rights reserved.
4*
5* Kendrick Smith <kmsmith@umich.edu>
6* Andy Adamson <kandros@umich.edu>
7*
8* Redistribution and use in source and binary forms, with or without
9* modification, are permitted provided that the following conditions
10* are met:
11*
12* 1. Redistributions of source code must retain the above copyright
13* notice, this list of conditions and the following disclaimer.
14* 2. Redistributions in binary form must reproduce the above copyright
15* notice, this list of conditions and the following disclaimer in the
16* documentation and/or other materials provided with the distribution.
17* 3. Neither the name of the University nor the names of its
18* contributors may be used to endorse or promote products derived
19* from this software without specific prior written permission.
20*
21* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32*
33*/
34
Dave Hansenaceaf782008-02-15 14:37:31 -080035#include <linux/file.h>
Arnd Bergmannb89f4322010-09-18 15:09:31 +020036#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
NeilBrown0964a3d2005-06-23 22:04:32 -070038#include <linux/namei.h>
Meelap Shahc2f1a552007-07-17 04:04:39 -070039#include <linux/swap.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040040#include <linux/pagemap.h>
Chuck Lever7df302f2012-05-29 13:56:37 -040041#include <linux/ratelimit.h>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050042#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton59766872013-02-04 12:50:00 -050043#include <linux/sunrpc/addr.h>
Daniel Borkmann87545892014-12-10 16:33:11 +010044#include <linux/jhash.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020045#include "xdr4.h"
J. Bruce Fields06b332a2013-04-09 11:34:36 -040046#include "xdr4cb.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050047#include "vfs.h"
J. Bruce Fieldsbfa4b362012-04-25 16:49:18 -040048#include "current_stateid.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040050#include "netns.h"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020051#include "pnfs.h"
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define NFSDDBG_FACILITY NFSDDBG_PROC
54
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050055#define all_ones {{~0,~0},~0}
56static const stateid_t one_stateid = {
57 .si_generation = ~0,
58 .si_opaque = all_ones,
59};
60static const stateid_t zero_stateid = {
61 /* all fields zero */
62};
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010063static const stateid_t currentstateid = {
64 .si_generation = 1,
65};
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050066
Andy Adamsonec6b5d72009-04-03 08:28:28 +030067static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070068
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050069#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
70#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010071#define CURRENT_STATEID(stateid) (!memcmp((stateid), &currentstateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/* forward declarations */
Jeff Laytonf9c00c32014-07-23 16:17:41 -040074static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
Trond Myklebust60116952014-07-29 21:34:06 -040075static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
J. Bruce Fields8b671b82009-02-22 14:51:34 -080077/* Locking: */
78
J. Bruce Fields8b671b82009-02-22 14:51:34 -080079/*
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
83 */
Benny Halevycdc97502014-05-30 09:09:30 -040084static DEFINE_SPINLOCK(state_lock);
J. Bruce Fields8b671b82009-02-22 14:51:34 -080085
Jeff Laytonb401be222014-07-29 21:34:33 -040086/*
87 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
88 * the refcount on the open stateid to drop.
89 */
90static DECLARE_WAIT_QUEUE_HEAD(close_wq);
91
Christoph Hellwigabf11352014-05-21 07:43:03 -070092static struct kmem_cache *openowner_slab;
93static struct kmem_cache *lockowner_slab;
94static struct kmem_cache *file_slab;
95static struct kmem_cache *stateid_slab;
96static struct kmem_cache *deleg_slab;
Sachin Bhamare8287f002015-04-27 14:50:14 +020097static struct kmem_cache *odstate_slab;
NeilBrowne60d4392005-06-23 22:03:01 -070098
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -040099static void free_session(struct nfsd4_session *);
Benny Halevy508dc6e2012-02-23 17:40:52 -0800100
Julia Lawallc4cb8972015-11-21 22:57:39 +0100101static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
Christoph Hellwig0162ac22014-09-24 12:19:19 +0200102
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400103static bool is_session_dead(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -0800104{
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400105 return ses->se_flags & NFS4_SESSION_DEAD;
106}
107
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -0400108static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
109{
110 if (atomic_read(&ses->se_ref) > ref_held_by_me)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400111 return nfserr_jukebox;
112 ses->se_flags |= NFS4_SESSION_DEAD;
113 return nfs_ok;
114}
115
J. Bruce Fields221a6872013-04-01 22:23:49 -0400116static bool is_client_expired(struct nfs4_client *clp)
117{
118 return clp->cl_time == 0;
119}
120
J. Bruce Fields221a6872013-04-01 22:23:49 -0400121static __be32 get_client_locked(struct nfs4_client *clp)
122{
Trond Myklebust0a880a22014-07-30 08:27:10 -0400123 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
124
125 lockdep_assert_held(&nn->client_lock);
126
J. Bruce Fields221a6872013-04-01 22:23:49 -0400127 if (is_client_expired(clp))
128 return nfserr_expired;
129 atomic_inc(&clp->cl_refcount);
130 return nfs_ok;
131}
132
133/* must be called under the client_lock */
134static inline void
135renew_client_locked(struct nfs4_client *clp)
136{
137 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
138
139 if (is_client_expired(clp)) {
140 WARN_ON(1);
141 printk("%s: client (clientid %08x/%08x) already expired\n",
142 __func__,
143 clp->cl_clientid.cl_boot,
144 clp->cl_clientid.cl_id);
145 return;
146 }
147
148 dprintk("renewing client (clientid %08x/%08x)\n",
149 clp->cl_clientid.cl_boot,
150 clp->cl_clientid.cl_id);
151 list_move_tail(&clp->cl_lru, &nn->client_lru);
152 clp->cl_time = get_seconds();
153}
154
Fengguang Wuba138432013-04-16 22:14:15 -0400155static void put_client_renew_locked(struct nfs4_client *clp)
J. Bruce Fields221a6872013-04-01 22:23:49 -0400156{
Trond Myklebust0a880a22014-07-30 08:27:10 -0400157 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
158
159 lockdep_assert_held(&nn->client_lock);
160
J. Bruce Fields221a6872013-04-01 22:23:49 -0400161 if (!atomic_dec_and_test(&clp->cl_refcount))
162 return;
163 if (!is_client_expired(clp))
164 renew_client_locked(clp);
165}
166
Jeff Layton4b24ca72014-06-30 11:48:44 -0400167static void put_client_renew(struct nfs4_client *clp)
168{
169 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
170
Jeff Laytond6c249b2014-07-08 14:02:50 -0400171 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
172 return;
173 if (!is_client_expired(clp))
174 renew_client_locked(clp);
Jeff Layton4b24ca72014-06-30 11:48:44 -0400175 spin_unlock(&nn->client_lock);
176}
177
Trond Myklebustd4e19e702014-06-30 11:48:42 -0400178static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
179{
180 __be32 status;
181
182 if (is_session_dead(ses))
183 return nfserr_badsession;
184 status = get_client_locked(ses->se_client);
185 if (status)
186 return status;
187 atomic_inc(&ses->se_ref);
188 return nfs_ok;
189}
190
191static void nfsd4_put_session_locked(struct nfsd4_session *ses)
192{
193 struct nfs4_client *clp = ses->se_client;
Trond Myklebust0a880a22014-07-30 08:27:10 -0400194 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
195
196 lockdep_assert_held(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -0400197
198 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
199 free_session(ses);
200 put_client_renew_locked(clp);
201}
202
203static void nfsd4_put_session(struct nfsd4_session *ses)
204{
205 struct nfs4_client *clp = ses->se_client;
206 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
207
208 spin_lock(&nn->client_lock);
209 nfsd4_put_session_locked(ses);
210 spin_unlock(&nn->client_lock);
211}
212
Kinglong Meeb5971af2014-08-22 10:18:43 -0400213static inline struct nfs4_stateowner *
214nfs4_get_stateowner(struct nfs4_stateowner *sop)
215{
216 atomic_inc(&sop->so_count);
217 return sop;
218}
219
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400220static int
Trond Myklebustd4f04892014-07-29 21:34:36 -0400221same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400222{
223 return (sop->so_owner.len == owner->len) &&
Trond Myklebustd4f04892014-07-29 21:34:36 -0400224 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400225}
226
227static struct nfs4_openowner *
228find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
Trond Myklebustd4f04892014-07-29 21:34:36 -0400229 struct nfs4_client *clp)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400230{
231 struct nfs4_stateowner *so;
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400232
Trond Myklebustd4f04892014-07-29 21:34:36 -0400233 lockdep_assert_held(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400234
Trond Myklebustd4f04892014-07-29 21:34:36 -0400235 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
236 so_strhash) {
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400237 if (!so->so_is_open_owner)
238 continue;
Kinglong Meeb5971af2014-08-22 10:18:43 -0400239 if (same_owner_str(so, &open->op_owner))
240 return openowner(nfs4_get_stateowner(so));
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400241 }
242 return NULL;
243}
244
245static struct nfs4_openowner *
246find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
Trond Myklebustd4f04892014-07-29 21:34:36 -0400247 struct nfs4_client *clp)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400248{
249 struct nfs4_openowner *oo;
250
Trond Myklebustd4f04892014-07-29 21:34:36 -0400251 spin_lock(&clp->cl_lock);
252 oo = find_openstateowner_str_locked(hashval, open, clp);
253 spin_unlock(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400254 return oo;
255}
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257static inline u32
258opaque_hashval(const void *ptr, int nbytes)
259{
260 unsigned char *cptr = (unsigned char *) ptr;
261
262 u32 x = 0;
263 while (nbytes--) {
264 x *= 37;
265 x += *cptr++;
266 }
267 return x;
268}
269
Jeff Layton5b095e92014-10-23 08:01:02 -0400270static void nfsd4_free_file_rcu(struct rcu_head *rcu)
J. Bruce Fields32513b42011-10-13 16:00:16 -0400271{
Jeff Layton5b095e92014-10-23 08:01:02 -0400272 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
273
274 kmem_cache_free(file_slab, fp);
J. Bruce Fields32513b42011-10-13 16:00:16 -0400275}
276
Christoph Hellwige6ba76e2014-08-14 08:50:16 +0200277void
NeilBrown13cd2182005-06-23 22:03:10 -0700278put_nfs4_file(struct nfs4_file *fi)
279{
Jeff Layton02e12152014-07-16 10:31:57 -0400280 might_lock(&state_lock);
281
Benny Halevycdc97502014-05-30 09:09:30 -0400282 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
Jeff Layton5b095e92014-10-23 08:01:02 -0400283 hlist_del_rcu(&fi->fi_hash);
Benny Halevycdc97502014-05-30 09:09:30 -0400284 spin_unlock(&state_lock);
Sachin Bhamare8287f002015-04-27 14:50:14 +0200285 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
Jeff Layton5b095e92014-10-23 08:01:02 -0400286 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
287 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800288 }
NeilBrown13cd2182005-06-23 22:03:10 -0700289}
290
Trond Myklebustde186432014-07-10 14:07:26 -0400291static struct file *
292__nfs4_get_fd(struct nfs4_file *f, int oflag)
293{
294 if (f->fi_fds[oflag])
295 return get_file(f->fi_fds[oflag]);
296 return NULL;
297}
298
299static struct file *
300find_writeable_file_locked(struct nfs4_file *f)
301{
302 struct file *ret;
303
304 lockdep_assert_held(&f->fi_lock);
305
306 ret = __nfs4_get_fd(f, O_WRONLY);
307 if (!ret)
308 ret = __nfs4_get_fd(f, O_RDWR);
309 return ret;
310}
311
312static struct file *
313find_writeable_file(struct nfs4_file *f)
314{
315 struct file *ret;
316
317 spin_lock(&f->fi_lock);
318 ret = find_writeable_file_locked(f);
319 spin_unlock(&f->fi_lock);
320
321 return ret;
322}
323
324static struct file *find_readable_file_locked(struct nfs4_file *f)
325{
326 struct file *ret;
327
328 lockdep_assert_held(&f->fi_lock);
329
330 ret = __nfs4_get_fd(f, O_RDONLY);
331 if (!ret)
332 ret = __nfs4_get_fd(f, O_RDWR);
333 return ret;
334}
335
336static struct file *
337find_readable_file(struct nfs4_file *f)
338{
339 struct file *ret;
340
341 spin_lock(&f->fi_lock);
342 ret = find_readable_file_locked(f);
343 spin_unlock(&f->fi_lock);
344
345 return ret;
346}
347
Christoph Hellwig4d227fc2014-08-17 07:40:00 -0500348struct file *
Trond Myklebustde186432014-07-10 14:07:26 -0400349find_any_file(struct nfs4_file *f)
350{
351 struct file *ret;
352
353 spin_lock(&f->fi_lock);
354 ret = __nfs4_get_fd(f, O_RDWR);
355 if (!ret) {
356 ret = __nfs4_get_fd(f, O_WRONLY);
357 if (!ret)
358 ret = __nfs4_get_fd(f, O_RDONLY);
359 }
360 spin_unlock(&f->fi_lock);
361 return ret;
362}
363
Trond Myklebust02a35082014-07-25 07:34:22 -0400364static atomic_long_t num_delegations;
Zhang Yanfei697ce9b2013-02-22 16:35:47 -0800365unsigned long max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700366
367/*
368 * Open owner state (share locks)
369 */
370
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500371/* hash tables for lock and open owners */
372#define OWNER_HASH_BITS 8
373#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
374#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
NeilBrownef0f3392006-04-10 22:55:41 -0700375
Trond Myklebustd4f04892014-07-29 21:34:36 -0400376static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400377{
378 unsigned int ret;
379
380 ret = opaque_hashval(ownername->data, ownername->len);
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500381 return ret & OWNER_HASH_MASK;
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400382}
NeilBrownef0f3392006-04-10 22:55:41 -0700383
NeilBrownef0f3392006-04-10 22:55:41 -0700384/* hash table for nfs4_file */
385#define FILE_HASH_BITS 8
386#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
Shan Wei35079582011-01-14 17:35:59 +0800387
Trond Myklebustca943212014-07-23 16:17:39 -0400388static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400389{
Trond Myklebustca943212014-07-23 16:17:39 -0400390 return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
391}
392
393static unsigned int file_hashval(struct knfsd_fh *fh)
394{
395 return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
396}
397
Jeff Layton89876f82013-04-02 09:01:59 -0400398static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700399
Jeff Layton12659652014-07-10 14:07:28 -0400400static void
401__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields34775652013-08-23 17:55:18 -0400402{
Jeff Layton7214e862014-07-10 14:07:33 -0400403 lockdep_assert_held(&fp->fi_lock);
404
Jeff Layton12659652014-07-10 14:07:28 -0400405 if (access & NFS4_SHARE_ACCESS_WRITE)
406 atomic_inc(&fp->fi_access[O_WRONLY]);
407 if (access & NFS4_SHARE_ACCESS_READ)
408 atomic_inc(&fp->fi_access[O_RDONLY]);
J. Bruce Fields34775652013-08-23 17:55:18 -0400409}
410
Jeff Layton12659652014-07-10 14:07:28 -0400411static __be32
412nfs4_file_get_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields998db522010-08-07 09:21:41 -0400413{
Jeff Layton7214e862014-07-10 14:07:33 -0400414 lockdep_assert_held(&fp->fi_lock);
415
Jeff Layton12659652014-07-10 14:07:28 -0400416 /* Does this access mode make sense? */
417 if (access & ~NFS4_SHARE_ACCESS_BOTH)
418 return nfserr_inval;
419
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400420 /* Does it conflict with a deny mode already set? */
421 if ((access & fp->fi_share_deny) != 0)
422 return nfserr_share_denied;
423
Jeff Layton12659652014-07-10 14:07:28 -0400424 __nfs4_file_get_access(fp, access);
425 return nfs_ok;
J. Bruce Fields998db522010-08-07 09:21:41 -0400426}
427
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400428static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
429{
430 /* Common case is that there is no deny mode. */
431 if (deny) {
432 /* Does this deny mode make sense? */
433 if (deny & ~NFS4_SHARE_DENY_BOTH)
434 return nfserr_inval;
435
436 if ((deny & NFS4_SHARE_DENY_READ) &&
437 atomic_read(&fp->fi_access[O_RDONLY]))
438 return nfserr_share_denied;
439
440 if ((deny & NFS4_SHARE_DENY_WRITE) &&
441 atomic_read(&fp->fi_access[O_WRONLY]))
442 return nfserr_share_denied;
443 }
444 return nfs_ok;
445}
446
J. Bruce Fields998db522010-08-07 09:21:41 -0400447static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400448{
Trond Myklebustde186432014-07-10 14:07:26 -0400449 might_lock(&fp->fi_lock);
450
451 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
452 struct file *f1 = NULL;
453 struct file *f2 = NULL;
454
Jeff Layton6d338b52014-07-10 14:07:29 -0400455 swap(f1, fp->fi_fds[oflag]);
J. Bruce Fields0c7c3e62013-03-28 20:37:14 -0400456 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
Jeff Layton6d338b52014-07-10 14:07:29 -0400457 swap(f2, fp->fi_fds[O_RDWR]);
Trond Myklebustde186432014-07-10 14:07:26 -0400458 spin_unlock(&fp->fi_lock);
459 if (f1)
460 fput(f1);
461 if (f2)
462 fput(f2);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400463 }
464}
465
Jeff Layton12659652014-07-10 14:07:28 -0400466static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields998db522010-08-07 09:21:41 -0400467{
Jeff Layton12659652014-07-10 14:07:28 -0400468 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
469
470 if (access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields998db522010-08-07 09:21:41 -0400471 __nfs4_file_put_access(fp, O_WRONLY);
Jeff Layton12659652014-07-10 14:07:28 -0400472 if (access & NFS4_SHARE_ACCESS_READ)
473 __nfs4_file_put_access(fp, O_RDONLY);
J. Bruce Fields998db522010-08-07 09:21:41 -0400474}
475
Sachin Bhamare8287f002015-04-27 14:50:14 +0200476/*
477 * Allocate a new open/delegation state counter. This is needed for
478 * pNFS for proper return on close semantics.
479 *
480 * Note that we only allocate it for pNFS-enabled exports, otherwise
481 * all pointers to struct nfs4_clnt_odstate are always NULL.
482 */
483static struct nfs4_clnt_odstate *
484alloc_clnt_odstate(struct nfs4_client *clp)
485{
486 struct nfs4_clnt_odstate *co;
487
488 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
489 if (co) {
490 co->co_client = clp;
491 atomic_set(&co->co_odcount, 1);
492 }
493 return co;
494}
495
496static void
497hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
498{
499 struct nfs4_file *fp = co->co_file;
500
501 lockdep_assert_held(&fp->fi_lock);
502 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
503}
504
505static inline void
506get_clnt_odstate(struct nfs4_clnt_odstate *co)
507{
508 if (co)
509 atomic_inc(&co->co_odcount);
510}
511
512static void
513put_clnt_odstate(struct nfs4_clnt_odstate *co)
514{
515 struct nfs4_file *fp;
516
517 if (!co)
518 return;
519
520 fp = co->co_file;
521 if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
522 list_del(&co->co_perfile);
523 spin_unlock(&fp->fi_lock);
524
525 nfsd4_return_all_file_layouts(co->co_client, fp);
526 kmem_cache_free(odstate_slab, co);
527 }
528}
529
530static struct nfs4_clnt_odstate *
531find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
532{
533 struct nfs4_clnt_odstate *co;
534 struct nfs4_client *cl;
535
536 if (!new)
537 return NULL;
538
539 cl = new->co_client;
540
541 spin_lock(&fp->fi_lock);
542 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
543 if (co->co_client == cl) {
544 get_clnt_odstate(co);
545 goto out;
546 }
547 }
548 co = new;
549 co->co_file = fp;
550 hash_clnt_odstate_locked(new);
551out:
552 spin_unlock(&fp->fi_lock);
553 return co;
554}
555
Christoph Hellwigcd61c522014-08-14 08:44:57 +0200556struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl,
Trond Myklebust60116952014-07-29 21:34:06 -0400557 struct kmem_cache *slab)
J. Bruce Fields996e0932011-10-17 11:14:48 -0400558{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500559 struct nfs4_stid *stid;
560 int new_id;
561
Trond Myklebustf8338832014-07-25 07:34:19 -0400562 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500563 if (!stid)
564 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400565
Jeff Layton4770d722014-07-29 21:34:10 -0400566 idr_preload(GFP_KERNEL);
567 spin_lock(&cl->cl_lock);
568 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
569 spin_unlock(&cl->cl_lock);
570 idr_preload_end();
Tejun Heoebd6c702013-03-13 14:59:37 -0700571 if (new_id < 0)
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500572 goto out_free;
573 stid->sc_client = cl;
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500574 stid->sc_stateid.si_opaque.so_id = new_id;
575 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
576 /* Will be incremented before return to client: */
Trond Myklebust72c0b0f2014-07-21 09:34:58 -0400577 atomic_set(&stid->sc_count, 1);
Jeff Layton9767feb2015-10-01 09:05:50 -0400578 spin_lock_init(&stid->sc_lock);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500579
J. Bruce Fields996e0932011-10-17 11:14:48 -0400580 /*
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500581 * It shouldn't be a problem to reuse an opaque stateid value.
582 * I don't think it is for 4.1. But with 4.0 I worry that, for
583 * example, a stray write retransmission could be accepted by
584 * the server when it should have been rejected. Therefore,
585 * adopt a trick from the sctp code to attempt to maximize the
586 * amount of time until an id is reused, by ensuring they always
587 * "increase" (mod INT_MAX):
J. Bruce Fields996e0932011-10-17 11:14:48 -0400588 */
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500589 return stid;
590out_free:
Wei Yongjun2c44a232013-04-09 14:15:31 +0800591 kmem_cache_free(slab, stid);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500592 return NULL;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400593}
594
Jeff Laytonb49e0842014-07-29 21:34:11 -0400595static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400596{
Trond Myklebust60116952014-07-29 21:34:06 -0400597 struct nfs4_stid *stid;
598 struct nfs4_ol_stateid *stp;
599
600 stid = nfs4_alloc_stid(clp, stateid_slab);
601 if (!stid)
602 return NULL;
603
604 stp = openlockstateid(stid);
605 stp->st_stid.sc_free = nfs4_free_ol_stateid;
606 return stp;
607}
608
609static void nfs4_free_deleg(struct nfs4_stid *stid)
610{
Trond Myklebust60116952014-07-29 21:34:06 -0400611 kmem_cache_free(deleg_slab, stid);
612 atomic_long_dec(&num_delegations);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400613}
614
NeilBrown6282cd52014-06-04 17:39:26 +1000615/*
616 * When we recall a delegation, we should be careful not to hand it
617 * out again straight away.
618 * To ensure this we keep a pair of bloom filters ('new' and 'old')
619 * in which the filehandles of recalled delegations are "stored".
620 * If a filehandle appear in either filter, a delegation is blocked.
621 * When a delegation is recalled, the filehandle is stored in the "new"
622 * filter.
623 * Every 30 seconds we swap the filters and clear the "new" one,
624 * unless both are empty of course.
625 *
626 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
627 * low 3 bytes as hash-table indices.
628 *
Jeff Laytonf54fe962014-07-25 07:34:26 -0400629 * 'blocked_delegations_lock', which is always taken in block_delegations(),
NeilBrown6282cd52014-06-04 17:39:26 +1000630 * is used to manage concurrent access. Testing does not need the lock
631 * except when swapping the two filters.
632 */
Jeff Laytonf54fe962014-07-25 07:34:26 -0400633static DEFINE_SPINLOCK(blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000634static struct bloom_pair {
635 int entries, old_entries;
636 time_t swap_time;
637 int new; /* index into 'set' */
638 DECLARE_BITMAP(set[2], 256);
639} blocked_delegations;
640
641static int delegation_blocked(struct knfsd_fh *fh)
642{
643 u32 hash;
644 struct bloom_pair *bd = &blocked_delegations;
645
646 if (bd->entries == 0)
647 return 0;
648 if (seconds_since_boot() - bd->swap_time > 30) {
Jeff Laytonf54fe962014-07-25 07:34:26 -0400649 spin_lock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000650 if (seconds_since_boot() - bd->swap_time > 30) {
651 bd->entries -= bd->old_entries;
652 bd->old_entries = bd->entries;
653 memset(bd->set[bd->new], 0,
654 sizeof(bd->set[0]));
655 bd->new = 1-bd->new;
656 bd->swap_time = seconds_since_boot();
657 }
Jeff Laytonf54fe962014-07-25 07:34:26 -0400658 spin_unlock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000659 }
Daniel Borkmann87545892014-12-10 16:33:11 +0100660 hash = jhash(&fh->fh_base, fh->fh_size, 0);
NeilBrown6282cd52014-06-04 17:39:26 +1000661 if (test_bit(hash&255, bd->set[0]) &&
662 test_bit((hash>>8)&255, bd->set[0]) &&
663 test_bit((hash>>16)&255, bd->set[0]))
664 return 1;
665
666 if (test_bit(hash&255, bd->set[1]) &&
667 test_bit((hash>>8)&255, bd->set[1]) &&
668 test_bit((hash>>16)&255, bd->set[1]))
669 return 1;
670
671 return 0;
672}
673
674static void block_delegations(struct knfsd_fh *fh)
675{
676 u32 hash;
677 struct bloom_pair *bd = &blocked_delegations;
678
Daniel Borkmann87545892014-12-10 16:33:11 +0100679 hash = jhash(&fh->fh_base, fh->fh_size, 0);
NeilBrown6282cd52014-06-04 17:39:26 +1000680
Jeff Laytonf54fe962014-07-25 07:34:26 -0400681 spin_lock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000682 __set_bit(hash&255, bd->set[bd->new]);
683 __set_bit((hash>>8)&255, bd->set[bd->new]);
684 __set_bit((hash>>16)&255, bd->set[bd->new]);
685 if (bd->entries == 0)
686 bd->swap_time = seconds_since_boot();
687 bd->entries += 1;
Jeff Laytonf54fe962014-07-25 07:34:26 -0400688 spin_unlock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000689}
690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691static struct nfs4_delegation *
Sachin Bhamare8287f002015-04-27 14:50:14 +0200692alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh,
693 struct nfs4_clnt_odstate *odstate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694{
695 struct nfs4_delegation *dp;
Trond Myklebust02a35082014-07-25 07:34:22 -0400696 long n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
698 dprintk("NFSD alloc_init_deleg\n");
Trond Myklebust02a35082014-07-25 07:34:22 -0400699 n = atomic_long_inc_return(&num_delegations);
700 if (n < 0 || n > max_delegations)
701 goto out_dec;
NeilBrown6282cd52014-06-04 17:39:26 +1000702 if (delegation_blocked(&current_fh->fh_handle))
Trond Myklebust02a35082014-07-25 07:34:22 -0400703 goto out_dec;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400704 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
NeilBrown5b2d21c2005-06-23 22:03:04 -0700705 if (dp == NULL)
Trond Myklebust02a35082014-07-25 07:34:22 -0400706 goto out_dec;
Trond Myklebust60116952014-07-29 21:34:06 -0400707
708 dp->dl_stid.sc_free = nfs4_free_deleg;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400709 /*
710 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400711 * meaning of seqid 0 isn't meaningful, really, but let's avoid
712 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400713 */
714 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownea1da632005-06-23 22:04:17 -0700715 INIT_LIST_HEAD(&dp->dl_perfile);
716 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 INIT_LIST_HEAD(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +0200718 dp->dl_clnt_odstate = odstate;
719 get_clnt_odstate(odstate);
J. Bruce Fields99c41512013-05-21 16:21:25 -0400720 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
Christoph Hellwigf0b5de12014-09-24 12:19:18 +0200721 dp->dl_retries = 1;
722 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
Christoph Hellwig0162ac22014-09-24 12:19:19 +0200723 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 return dp;
Trond Myklebust02a35082014-07-25 07:34:22 -0400725out_dec:
726 atomic_long_dec(&num_delegations);
727 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728}
729
730void
Trond Myklebust60116952014-07-29 21:34:06 -0400731nfs4_put_stid(struct nfs4_stid *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732{
Trond Myklebust11b91642014-07-29 21:34:08 -0400733 struct nfs4_file *fp = s->sc_file;
Trond Myklebust60116952014-07-29 21:34:06 -0400734 struct nfs4_client *clp = s->sc_client;
735
Jeff Layton4770d722014-07-29 21:34:10 -0400736 might_lock(&clp->cl_lock);
737
Jeff Laytonb401be222014-07-29 21:34:33 -0400738 if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
739 wake_up_all(&close_wq);
Trond Myklebust60116952014-07-29 21:34:06 -0400740 return;
Jeff Laytonb401be222014-07-29 21:34:33 -0400741 }
Trond Myklebust60116952014-07-29 21:34:06 -0400742 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
Jeff Layton4770d722014-07-29 21:34:10 -0400743 spin_unlock(&clp->cl_lock);
Trond Myklebust60116952014-07-29 21:34:06 -0400744 s->sc_free(s);
Trond Myklebust11b91642014-07-29 21:34:08 -0400745 if (fp)
746 put_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747}
748
Jeff Layton9767feb2015-10-01 09:05:50 -0400749void
750nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
751{
752 stateid_t *src = &stid->sc_stateid;
753
754 spin_lock(&stid->sc_lock);
755 if (unlikely(++src->si_generation == 0))
756 src->si_generation = 1;
757 memcpy(dst, src, sizeof(*dst));
758 spin_unlock(&stid->sc_lock);
759}
760
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500761static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762{
Jeff Layton6bcc0342014-08-09 10:22:40 -0400763 struct file *filp = NULL;
Jeff Layton417c6622014-07-21 09:34:57 -0400764
Jeff Layton6bcc0342014-08-09 10:22:40 -0400765 spin_lock(&fp->fi_lock);
Jeff Layton67db1032014-12-13 09:11:40 -0500766 if (fp->fi_deleg_file && --fp->fi_delegees == 0)
Jeff Layton6bcc0342014-08-09 10:22:40 -0400767 swap(filp, fp->fi_deleg_file);
Jeff Layton6bcc0342014-08-09 10:22:40 -0400768 spin_unlock(&fp->fi_lock);
769
770 if (filp) {
Christoph Hellwig2ab99ee2015-01-21 19:14:02 +0100771 vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp);
Jeff Layton6bcc0342014-08-09 10:22:40 -0400772 fput(filp);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500773 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774}
775
Christoph Hellwigcd61c522014-08-14 08:44:57 +0200776void nfs4_unhash_stid(struct nfs4_stid *s)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400777{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500778 s->sc_type = 0;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400779}
780
Andrew Elble34ed9872015-10-15 12:07:28 -0400781/**
782 * nfs4_get_existing_delegation - Discover if this delegation already exists
783 * @clp: a pointer to the nfs4_client we're granting a delegation to
784 * @fp: a pointer to the nfs4_file we're granting a delegation on
785 *
786 * Return:
787 * On success: NULL if an existing delegation was not found.
788 *
789 * On error: -EAGAIN if one was previously granted to this nfs4_client
790 * for this nfs4_file.
791 *
792 */
793
794static int
795nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp)
Benny Halevy931ee562014-05-30 09:09:27 -0400796{
Andrew Elble34ed9872015-10-15 12:07:28 -0400797 struct nfs4_delegation *searchdp = NULL;
798 struct nfs4_client *searchclp = NULL;
799
Benny Halevycdc97502014-05-30 09:09:30 -0400800 lockdep_assert_held(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -0400801 lockdep_assert_held(&fp->fi_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400802
Andrew Elble34ed9872015-10-15 12:07:28 -0400803 list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {
804 searchclp = searchdp->dl_stid.sc_client;
805 if (clp == searchclp) {
806 return -EAGAIN;
807 }
808 }
809 return 0;
810}
811
812/**
813 * hash_delegation_locked - Add a delegation to the appropriate lists
814 * @dp: a pointer to the nfs4_delegation we are adding.
815 * @fp: a pointer to the nfs4_file we're granting a delegation on
816 *
817 * Return:
818 * On success: NULL if the delegation was successfully hashed.
819 *
820 * On error: -EAGAIN if one was previously granted to this
821 * nfs4_client for this nfs4_file. Delegation is not hashed.
822 *
823 */
824
825static int
826hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
827{
828 int status;
829 struct nfs4_client *clp = dp->dl_stid.sc_client;
830
831 lockdep_assert_held(&state_lock);
832 lockdep_assert_held(&fp->fi_lock);
833
834 status = nfs4_get_existing_delegation(clp, fp);
835 if (status)
836 return status;
837 ++fp->fi_delegees;
Trond Myklebust67cb1272014-07-29 21:34:17 -0400838 atomic_inc(&dp->dl_stid.sc_count);
Benny Halevy3fb87d12014-05-30 09:09:31 -0400839 dp->dl_stid.sc_type = NFS4_DELEG_STID;
Benny Halevy931ee562014-05-30 09:09:27 -0400840 list_add(&dp->dl_perfile, &fp->fi_delegations);
Andrew Elble34ed9872015-10-15 12:07:28 -0400841 list_add(&dp->dl_perclnt, &clp->cl_delegations);
842 return 0;
Benny Halevy931ee562014-05-30 09:09:27 -0400843}
844
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400845static bool
Jeff Layton42690672014-07-25 07:34:20 -0400846unhash_delegation_locked(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847{
Trond Myklebust11b91642014-07-29 21:34:08 -0400848 struct nfs4_file *fp = dp->dl_stid.sc_file;
Jeff Layton02e12152014-07-16 10:31:57 -0400849
Jeff Layton42690672014-07-25 07:34:20 -0400850 lockdep_assert_held(&state_lock);
851
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400852 if (list_empty(&dp->dl_perfile))
853 return false;
854
Trond Myklebustb0fc29d2014-07-16 10:31:59 -0400855 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
Jeff Laytond55a1662014-07-22 13:52:06 -0400856 /* Ensure that deleg break won't try to requeue it */
857 ++dp->dl_time;
Jeff Layton417c6622014-07-21 09:34:57 -0400858 spin_lock(&fp->fi_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400859 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 list_del_init(&dp->dl_recall_lru);
Jeff Layton02e12152014-07-16 10:31:57 -0400861 list_del_init(&dp->dl_perfile);
862 spin_unlock(&fp->fi_lock);
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400863 return true;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400864}
865
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400866static void destroy_delegation(struct nfs4_delegation *dp)
867{
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400868 bool unhashed;
869
Jeff Layton42690672014-07-25 07:34:20 -0400870 spin_lock(&state_lock);
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400871 unhashed = unhash_delegation_locked(dp);
Jeff Layton42690672014-07-25 07:34:20 -0400872 spin_unlock(&state_lock);
Jeff Layton3fcbbd22015-08-24 12:41:48 -0400873 if (unhashed) {
874 put_clnt_odstate(dp->dl_clnt_odstate);
875 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
876 nfs4_put_stid(&dp->dl_stid);
877 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400878}
879
880static void revoke_delegation(struct nfs4_delegation *dp)
881{
882 struct nfs4_client *clp = dp->dl_stid.sc_client;
883
Jeff Layton2d4a5322014-07-25 07:34:21 -0400884 WARN_ON(!list_empty(&dp->dl_recall_lru));
885
Sachin Bhamare8287f002015-04-27 14:50:14 +0200886 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -0400887 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
888
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400889 if (clp->cl_minorversion == 0)
Trond Myklebust60116952014-07-29 21:34:06 -0400890 nfs4_put_stid(&dp->dl_stid);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400891 else {
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400892 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
Jeff Layton2d4a5322014-07-25 07:34:21 -0400893 spin_lock(&clp->cl_lock);
894 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
895 spin_unlock(&clp->cl_lock);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400896 }
897}
898
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899/*
900 * SETCLIENTID state
901 */
902
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400903static unsigned int clientid_hashval(u32 id)
904{
905 return id & CLIENT_HASH_MASK;
906}
907
908static unsigned int clientstr_hashval(const char *name)
909{
910 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
911}
912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913/*
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400914 * We store the NONE, READ, WRITE, and BOTH bits separately in the
915 * st_{access,deny}_bmap field of the stateid, in order to track not
916 * only what share bits are currently in force, but also what
917 * combinations of share bits previous opens have used. This allows us
918 * to enforce the recommendation of rfc 3530 14.2.19 that the server
919 * return an error if the client attempt to downgrade to a combination
920 * of share bits not explicable by closing some of its previous opens.
921 *
922 * XXX: This enforcement is actually incomplete, since we don't keep
923 * track of access/deny bit combinations; so, e.g., we allow:
924 *
925 * OPEN allow read, deny write
926 * OPEN allow both, deny none
927 * DOWNGRADE allow read, deny none
928 *
929 * which we should reject.
930 */
Jeff Layton5ae037e2012-05-11 09:45:11 -0400931static unsigned int
932bmap_to_share_mode(unsigned long bmap) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400933 int i;
Jeff Layton5ae037e2012-05-11 09:45:11 -0400934 unsigned int access = 0;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400935
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400936 for (i = 1; i < 4; i++) {
937 if (test_bit(i, &bmap))
Jeff Layton5ae037e2012-05-11 09:45:11 -0400938 access |= i;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400939 }
Jeff Layton5ae037e2012-05-11 09:45:11 -0400940 return access;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400941}
942
Jeff Layton82c5ff12012-05-11 09:45:13 -0400943/* set share access for a given stateid */
944static inline void
945set_access(u32 access, struct nfs4_ol_stateid *stp)
946{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400947 unsigned char mask = 1 << access;
948
949 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
950 stp->st_access_bmap |= mask;
Jeff Layton82c5ff12012-05-11 09:45:13 -0400951}
952
953/* clear share access for a given stateid */
954static inline void
955clear_access(u32 access, struct nfs4_ol_stateid *stp)
956{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400957 unsigned char mask = 1 << access;
958
959 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
960 stp->st_access_bmap &= ~mask;
Jeff Layton82c5ff12012-05-11 09:45:13 -0400961}
962
963/* test whether a given stateid has access */
964static inline bool
965test_access(u32 access, struct nfs4_ol_stateid *stp)
966{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400967 unsigned char mask = 1 << access;
968
969 return (bool)(stp->st_access_bmap & mask);
Jeff Layton82c5ff12012-05-11 09:45:13 -0400970}
971
Jeff Laytonce0fc432012-05-11 09:45:14 -0400972/* set share deny for a given stateid */
973static inline void
Jeff Laytonc11c5912014-07-10 14:07:30 -0400974set_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400975{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400976 unsigned char mask = 1 << deny;
977
978 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
979 stp->st_deny_bmap |= mask;
Jeff Laytonce0fc432012-05-11 09:45:14 -0400980}
981
982/* clear share deny for a given stateid */
983static inline void
Jeff Laytonc11c5912014-07-10 14:07:30 -0400984clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400985{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400986 unsigned char mask = 1 << deny;
987
988 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
989 stp->st_deny_bmap &= ~mask;
Jeff Laytonce0fc432012-05-11 09:45:14 -0400990}
991
992/* test whether a given stateid is denying specific access */
993static inline bool
Jeff Laytonc11c5912014-07-10 14:07:30 -0400994test_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400995{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400996 unsigned char mask = 1 << deny;
997
998 return (bool)(stp->st_deny_bmap & mask);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400999}
1000
1001static int nfs4_access_to_omode(u32 access)
1002{
J. Bruce Fields8f34a432010-09-02 15:23:16 -04001003 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04001004 case NFS4_SHARE_ACCESS_READ:
1005 return O_RDONLY;
1006 case NFS4_SHARE_ACCESS_WRITE:
1007 return O_WRONLY;
1008 case NFS4_SHARE_ACCESS_BOTH:
1009 return O_RDWR;
1010 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05001011 WARN_ON_ONCE(1);
1012 return O_RDONLY;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04001013}
1014
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04001015/*
1016 * A stateid that had a deny mode associated with it is being released
1017 * or downgraded. Recalculate the deny mode on the file.
1018 */
1019static void
1020recalculate_deny_mode(struct nfs4_file *fp)
1021{
1022 struct nfs4_ol_stateid *stp;
1023
1024 spin_lock(&fp->fi_lock);
1025 fp->fi_share_deny = 0;
1026 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
1027 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
1028 spin_unlock(&fp->fi_lock);
1029}
1030
1031static void
1032reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
1033{
1034 int i;
1035 bool change = false;
1036
1037 for (i = 1; i < 4; i++) {
1038 if ((i & deny) != i) {
1039 change = true;
1040 clear_deny(i, stp);
1041 }
1042 }
1043
1044 /* Recalculate per-file deny mode if there was a change */
1045 if (change)
Trond Myklebust11b91642014-07-29 21:34:08 -04001046 recalculate_deny_mode(stp->st_stid.sc_file);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04001047}
1048
Jeff Layton82c5ff12012-05-11 09:45:13 -04001049/* release all access and file references for a given stateid */
1050static void
1051release_all_access(struct nfs4_ol_stateid *stp)
1052{
1053 int i;
Trond Myklebust11b91642014-07-29 21:34:08 -04001054 struct nfs4_file *fp = stp->st_stid.sc_file;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04001055
1056 if (fp && stp->st_deny_bmap != 0)
1057 recalculate_deny_mode(fp);
Jeff Layton82c5ff12012-05-11 09:45:13 -04001058
1059 for (i = 1; i < 4; i++) {
1060 if (test_access(i, stp))
Trond Myklebust11b91642014-07-29 21:34:08 -04001061 nfs4_file_put_access(stp->st_stid.sc_file, i);
Jeff Layton82c5ff12012-05-11 09:45:13 -04001062 clear_access(i, stp);
1063 }
1064}
1065
Kinglong Meed50ffde2015-07-16 12:05:07 +08001066static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
1067{
1068 kfree(sop->so_owner.data);
1069 sop->so_ops->so_free(sop);
1070}
1071
Jeff Layton6b180f02014-07-29 21:34:26 -04001072static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
1073{
Jeff Laytona819ecc2014-07-29 21:34:38 -04001074 struct nfs4_client *clp = sop->so_client;
1075
1076 might_lock(&clp->cl_lock);
1077
1078 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
Jeff Layton6b180f02014-07-29 21:34:26 -04001079 return;
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001080 sop->so_ops->so_unhash(sop);
Jeff Laytona819ecc2014-07-29 21:34:38 -04001081 spin_unlock(&clp->cl_lock);
Kinglong Meed50ffde2015-07-16 12:05:07 +08001082 nfs4_free_stateowner(sop);
Jeff Layton6b180f02014-07-29 21:34:26 -04001083}
1084
Jeff Laytone8568732015-08-24 12:41:47 -04001085static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001086{
Trond Myklebust11b91642014-07-29 21:34:08 -04001087 struct nfs4_file *fp = stp->st_stid.sc_file;
Trond Myklebust1d31a252014-07-10 14:07:25 -04001088
Jeff Layton1c755dc2014-07-29 21:34:12 -04001089 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1090
Jeff Laytone8568732015-08-24 12:41:47 -04001091 if (list_empty(&stp->st_perfile))
1092 return false;
1093
Trond Myklebust1d31a252014-07-10 14:07:25 -04001094 spin_lock(&fp->fi_lock);
Jeff Laytone8568732015-08-24 12:41:47 -04001095 list_del_init(&stp->st_perfile);
Trond Myklebust1d31a252014-07-10 14:07:25 -04001096 spin_unlock(&fp->fi_lock);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001097 list_del(&stp->st_perstateowner);
Jeff Laytone8568732015-08-24 12:41:47 -04001098 return true;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001099}
1100
Trond Myklebust60116952014-07-29 21:34:06 -04001101static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001102{
Trond Myklebust60116952014-07-29 21:34:06 -04001103 struct nfs4_ol_stateid *stp = openlockstateid(stid);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -04001104
Sachin Bhamare8287f002015-04-27 14:50:14 +02001105 put_clnt_odstate(stp->st_clnt_odstate);
Trond Myklebust60116952014-07-29 21:34:06 -04001106 release_all_access(stp);
Jeff Laytond3134b12014-07-29 21:34:32 -04001107 if (stp->st_stateowner)
1108 nfs4_put_stateowner(stp->st_stateowner);
Trond Myklebust60116952014-07-29 21:34:06 -04001109 kmem_cache_free(stateid_slab, stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001110}
1111
Jeff Laytonb49e0842014-07-29 21:34:11 -04001112static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001113{
Jeff Laytonb49e0842014-07-29 21:34:11 -04001114 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1115 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001116 struct file *file;
1117
Jeff Laytonb49e0842014-07-29 21:34:11 -04001118 file = find_any_file(stp->st_stid.sc_file);
1119 if (file)
1120 filp_close(file, (fl_owner_t)lo);
1121 nfs4_free_ol_stateid(stid);
1122}
1123
Jeff Layton2c41beb2014-07-29 21:34:41 -04001124/*
1125 * Put the persistent reference to an already unhashed generic stateid, while
1126 * holding the cl_lock. If it's the last reference, then put it onto the
1127 * reaplist for later destruction.
1128 */
1129static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1130 struct list_head *reaplist)
1131{
1132 struct nfs4_stid *s = &stp->st_stid;
1133 struct nfs4_client *clp = s->sc_client;
1134
1135 lockdep_assert_held(&clp->cl_lock);
1136
1137 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1138
1139 if (!atomic_dec_and_test(&s->sc_count)) {
1140 wake_up_all(&close_wq);
1141 return;
1142 }
1143
1144 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1145 list_add(&stp->st_locks, reaplist);
1146}
1147
Jeff Laytone8568732015-08-24 12:41:47 -04001148static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
Jeff Layton3c1c9952014-07-29 21:34:39 -04001149{
1150 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
1151
1152 lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);
1153
1154 list_del_init(&stp->st_locks);
Christoph Hellwigcd61c522014-08-14 08:44:57 +02001155 nfs4_unhash_stid(&stp->st_stid);
Jeff Laytone8568732015-08-24 12:41:47 -04001156 return unhash_ol_stateid(stp);
Jeff Layton3c1c9952014-07-29 21:34:39 -04001157}
1158
Jeff Layton5adfd882014-07-29 21:34:31 -04001159static void release_lock_stateid(struct nfs4_ol_stateid *stp)
Jeff Laytonb49e0842014-07-29 21:34:11 -04001160{
Jeff Layton1c755dc2014-07-29 21:34:12 -04001161 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
Jeff Laytone8568732015-08-24 12:41:47 -04001162 bool unhashed;
Jeff Layton1c755dc2014-07-29 21:34:12 -04001163
1164 spin_lock(&oo->oo_owner.so_client->cl_lock);
Jeff Laytone8568732015-08-24 12:41:47 -04001165 unhashed = unhash_lock_stateid(stp);
Jeff Layton1c755dc2014-07-29 21:34:12 -04001166 spin_unlock(&oo->oo_owner.so_client->cl_lock);
Jeff Laytone8568732015-08-24 12:41:47 -04001167 if (unhashed)
1168 nfs4_put_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001169}
1170
Trond Myklebustc58c6612014-07-29 21:34:35 -04001171static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001172{
Trond Myklebustd4f04892014-07-29 21:34:36 -04001173 struct nfs4_client *clp = lo->lo_owner.so_client;
Trond Myklebustc58c6612014-07-29 21:34:35 -04001174
Trond Myklebustd4f04892014-07-29 21:34:36 -04001175 lockdep_assert_held(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04001176
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001177 list_del_init(&lo->lo_owner.so_strhash);
1178}
1179
Jeff Layton2c41beb2014-07-29 21:34:41 -04001180/*
1181 * Free a list of generic stateids that were collected earlier after being
1182 * fully unhashed.
1183 */
1184static void
1185free_ol_stateid_reaplist(struct list_head *reaplist)
1186{
1187 struct nfs4_ol_stateid *stp;
Kinglong Meefb94d762014-08-05 21:20:27 +08001188 struct nfs4_file *fp;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001189
1190 might_sleep();
1191
1192 while (!list_empty(reaplist)) {
1193 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1194 st_locks);
1195 list_del(&stp->st_locks);
Kinglong Meefb94d762014-08-05 21:20:27 +08001196 fp = stp->st_stid.sc_file;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001197 stp->st_stid.sc_free(&stp->st_stid);
Kinglong Meefb94d762014-08-05 21:20:27 +08001198 if (fp)
1199 put_nfs4_file(fp);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001200 }
1201}
1202
Jeff Laytond83017f2014-07-29 21:34:42 -04001203static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1204 struct list_head *reaplist)
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04001205{
1206 struct nfs4_ol_stateid *stp;
1207
Jeff Laytone8568732015-08-24 12:41:47 -04001208 lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);
1209
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04001210 while (!list_empty(&open_stp->st_locks)) {
1211 stp = list_entry(open_stp->st_locks.next,
1212 struct nfs4_ol_stateid, st_locks);
Jeff Laytone8568732015-08-24 12:41:47 -04001213 WARN_ON(!unhash_lock_stateid(stp));
Jeff Laytond83017f2014-07-29 21:34:42 -04001214 put_ol_stateid_locked(stp, reaplist);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001215 }
1216}
1217
Jeff Laytone8568732015-08-24 12:41:47 -04001218static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
Jeff Laytond83017f2014-07-29 21:34:42 -04001219 struct list_head *reaplist)
J. Bruce Fields22839632009-01-11 14:27:17 -05001220{
Jeff Laytone8568732015-08-24 12:41:47 -04001221 bool unhashed;
1222
Jeff Layton2c41beb2014-07-29 21:34:41 -04001223 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1224
Jeff Laytone8568732015-08-24 12:41:47 -04001225 unhashed = unhash_ol_stateid(stp);
Jeff Laytond83017f2014-07-29 21:34:42 -04001226 release_open_stateid_locks(stp, reaplist);
Jeff Laytone8568732015-08-24 12:41:47 -04001227 return unhashed;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04001228}
1229
1230static void release_open_stateid(struct nfs4_ol_stateid *stp)
1231{
Jeff Layton2c41beb2014-07-29 21:34:41 -04001232 LIST_HEAD(reaplist);
1233
1234 spin_lock(&stp->st_stid.sc_client->cl_lock);
Jeff Laytone8568732015-08-24 12:41:47 -04001235 if (unhash_open_stateid(stp, &reaplist))
1236 put_ol_stateid_locked(stp, &reaplist);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001237 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1238 free_ol_stateid_reaplist(&reaplist);
J. Bruce Fields22839632009-01-11 14:27:17 -05001239}
1240
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001241static void unhash_openowner_locked(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001242{
Trond Myklebustd4f04892014-07-29 21:34:36 -04001243 struct nfs4_client *clp = oo->oo_owner.so_client;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001244
Trond Myklebustd4f04892014-07-29 21:34:36 -04001245 lockdep_assert_held(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001246
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001247 list_del_init(&oo->oo_owner.so_strhash);
1248 list_del_init(&oo->oo_perclient);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001249}
1250
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001251static void release_last_closed_stateid(struct nfs4_openowner *oo)
1252{
Jeff Layton217526e2014-07-30 08:27:11 -04001253 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1254 nfsd_net_id);
1255 struct nfs4_ol_stateid *s;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001256
Jeff Layton217526e2014-07-30 08:27:11 -04001257 spin_lock(&nn->client_lock);
1258 s = oo->oo_last_closed_stid;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001259 if (s) {
Jeff Laytond3134b12014-07-29 21:34:32 -04001260 list_del_init(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001261 oo->oo_last_closed_stid = NULL;
1262 }
Jeff Layton217526e2014-07-30 08:27:11 -04001263 spin_unlock(&nn->client_lock);
1264 if (s)
1265 nfs4_put_stid(&s->st_stid);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001266}
1267
Jeff Layton2c41beb2014-07-29 21:34:41 -04001268static void release_openowner(struct nfs4_openowner *oo)
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001269{
1270 struct nfs4_ol_stateid *stp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001271 struct nfs4_client *clp = oo->oo_owner.so_client;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001272 struct list_head reaplist;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001273
Jeff Layton2c41beb2014-07-29 21:34:41 -04001274 INIT_LIST_HEAD(&reaplist);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001275
Trond Myklebustd4f04892014-07-29 21:34:36 -04001276 spin_lock(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001277 unhash_openowner_locked(oo);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001278 while (!list_empty(&oo->oo_owner.so_stateids)) {
1279 stp = list_first_entry(&oo->oo_owner.so_stateids,
1280 struct nfs4_ol_stateid, st_perstateowner);
Jeff Laytone8568732015-08-24 12:41:47 -04001281 if (unhash_open_stateid(stp, &reaplist))
1282 put_ol_stateid_locked(stp, &reaplist);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001283 }
Trond Myklebustd4f04892014-07-29 21:34:36 -04001284 spin_unlock(&clp->cl_lock);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001285 free_ol_stateid_reaplist(&reaplist);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001286 release_last_closed_stateid(oo);
Jeff Layton6b180f02014-07-29 21:34:26 -04001287 nfs4_put_stateowner(&oo->oo_owner);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001288}
1289
Marc Eshel5282fd72009-04-03 08:27:52 +03001290static inline int
1291hash_sessionid(struct nfs4_sessionid *sessionid)
1292{
1293 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1294
1295 return sid->sequence % SESSION_HASH_SIZE;
1296}
1297
Mark Salter135dd002015-04-06 09:46:00 -04001298#ifdef CONFIG_SUNRPC_DEBUG
Marc Eshel5282fd72009-04-03 08:27:52 +03001299static inline void
1300dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1301{
1302 u32 *ptr = (u32 *)(&sessionid->data[0]);
1303 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1304}
Trond Myklebust8f199b82012-03-20 15:11:17 -04001305#else
1306static inline void
1307dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1308{
1309}
1310#endif
1311
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04001312/*
1313 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1314 * won't be used for replay.
1315 */
1316void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1317{
1318 struct nfs4_stateowner *so = cstate->replay_owner;
1319
1320 if (nfserr == nfserr_replay_me)
1321 return;
1322
1323 if (!seqid_mutating_err(ntohl(nfserr))) {
Jeff Layton58fb12e2014-07-29 21:34:27 -04001324 nfsd4_cstate_clear_replay(cstate);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04001325 return;
1326 }
1327 if (!so)
1328 return;
1329 if (so->so_is_open_owner)
1330 release_last_closed_stateid(openowner(so));
1331 so->so_seqid++;
1332 return;
1333}
Marc Eshel5282fd72009-04-03 08:27:52 +03001334
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001335static void
1336gen_sessionid(struct nfsd4_session *ses)
1337{
1338 struct nfs4_client *clp = ses->se_client;
1339 struct nfsd4_sessionid *sid;
1340
1341 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1342 sid->clientid = clp->cl_clientid;
1343 sid->sequence = current_sessionid++;
1344 sid->reserved = 0;
1345}
1346
1347/*
Andy Adamsona6496372009-08-28 08:45:01 -04001348 * The protocol defines ca_maxresponssize_cached to include the size of
1349 * the rpc header, but all we need to cache is the data starting after
1350 * the end of the initial SEQUENCE operation--the rest we regenerate
1351 * each time. Therefore we can advertise a ca_maxresponssize_cached
1352 * value that is the number of bytes in our cache plus a few additional
1353 * bytes. In order to stay on the safe side, and not promise more than
1354 * we can cache, those additional bytes must be the minimum possible: 24
1355 * bytes of rpc header (xid through accept state, with AUTH_NULL
1356 * verifier), 12 for the compound header (with zero-length tag), and 44
1357 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001358 */
Andy Adamsona6496372009-08-28 08:45:01 -04001359#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1360
Andy Adamson557ce262009-08-28 08:45:04 -04001361static void
1362free_session_slots(struct nfsd4_session *ses)
1363{
1364 int i;
1365
1366 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
1367 kfree(ses->se_slots[i]);
1368}
1369
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001370/*
1371 * We don't actually need to cache the rpc and session headers, so we
1372 * can allocate a little less for each slot:
1373 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001374static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001375{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001376 u32 size;
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001377
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001378 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1379 size = 0;
1380 else
1381 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1382 return size + sizeof(struct nfsd4_slot);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001383}
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001384
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001385/*
1386 * XXX: If we run out of reserved DRC memory we could (up to a point)
1387 * re-negotiate active sessions and reduce their slot usage to make
Justin P. Mattock42b2aa82011-11-28 20:31:00 -08001388 * room for new connections. For now we just fail the create session.
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001389 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001390static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001391{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001392 u32 slotsize = slot_bytes(ca);
1393 u32 num = ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001394 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001395
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001396 spin_lock(&nfsd_drc_lock);
Zhang Yanfei697ce9b2013-02-22 16:35:47 -08001397 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1398 nfsd_drc_max_mem - nfsd_drc_mem_used);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001399 num = min_t(int, num, avail / slotsize);
1400 nfsd_drc_mem_used += num * slotsize;
1401 spin_unlock(&nfsd_drc_lock);
1402
1403 return num;
1404}
1405
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001406static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001407{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001408 int slotsize = slot_bytes(ca);
1409
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001410 spin_lock(&nfsd_drc_lock);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001411 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001412 spin_unlock(&nfsd_drc_lock);
1413}
1414
Kinglong Mee60810e52014-01-01 00:35:47 +08001415static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1416 struct nfsd4_channel_attrs *battrs)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001417{
Kinglong Mee60810e52014-01-01 00:35:47 +08001418 int numslots = fattrs->maxreqs;
1419 int slotsize = slot_bytes(fattrs);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001420 struct nfsd4_session *new;
1421 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001422
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -04001423 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001424 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1425 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -04001426
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001427 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001428 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001429 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -04001430 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001431 for (i = 0; i < numslots; i++) {
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001432 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001433 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -04001434 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -04001435 }
Kinglong Mee60810e52014-01-01 00:35:47 +08001436
1437 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1438 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1439
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001440 return new;
1441out_free:
1442 while (i--)
1443 kfree(new->se_slots[i]);
1444 kfree(new);
1445 return NULL;
1446}
1447
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001448static void free_conn(struct nfsd4_conn *c)
1449{
1450 svc_xprt_put(c->cn_xprt);
1451 kfree(c);
1452}
1453
1454static void nfsd4_conn_lost(struct svc_xpt_user *u)
1455{
1456 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1457 struct nfs4_client *clp = c->cn_session->se_client;
1458
1459 spin_lock(&clp->cl_lock);
1460 if (!list_empty(&c->cn_persession)) {
1461 list_del(&c->cn_persession);
1462 free_conn(c);
1463 }
J. Bruce Fieldseea49802010-11-18 08:34:12 -05001464 nfsd4_probe_callback(clp);
J. Bruce Fields2e4b7232013-03-08 09:30:43 -05001465 spin_unlock(&clp->cl_lock);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001466}
1467
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -04001468static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001469{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001470 struct nfsd4_conn *conn;
1471
1472 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1473 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001474 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001475 svc_xprt_get(rqstp->rq_xprt);
1476 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -04001477 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001478 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1479 return conn;
1480}
1481
J. Bruce Fields328ead22010-09-29 16:11:06 -04001482static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1483{
1484 conn->cn_session = ses;
1485 list_add(&conn->cn_persession, &ses->se_conns);
1486}
1487
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001488static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1489{
1490 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001491
1492 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001493 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001494 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001495}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001496
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001497static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001498{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001499 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001500 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001501}
1502
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001503static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001504{
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001505 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001506
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001507 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001508 ret = nfsd4_register_conn(conn);
1509 if (ret)
1510 /* oops; xprt is already down: */
1511 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fields57a37142014-07-18 15:06:47 -04001512 /* We may have gained or lost a callback channel: */
1513 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001514}
1515
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001516static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001517{
1518 u32 dir = NFS4_CDFC4_FORE;
1519
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001520 if (cses->flags & SESSION4_BACK_CHAN)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001521 dir |= NFS4_CDFC4_BACK;
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001522 return alloc_conn(rqstp, dir);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001523}
1524
1525/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001526static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001527{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001528 struct nfs4_client *clp = s->se_client;
1529 struct nfsd4_conn *c;
1530
1531 spin_lock(&clp->cl_lock);
1532 while (!list_empty(&s->se_conns)) {
1533 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1534 list_del_init(&c->cn_persession);
1535 spin_unlock(&clp->cl_lock);
1536
1537 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1538 free_conn(c);
1539
1540 spin_lock(&clp->cl_lock);
1541 }
1542 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001543}
1544
J. Bruce Fields1377b692012-09-11 21:42:40 -04001545static void __free_session(struct nfsd4_session *ses)
1546{
J. Bruce Fields1377b692012-09-11 21:42:40 -04001547 free_session_slots(ses);
1548 kfree(ses);
1549}
1550
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001551static void free_session(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -08001552{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001553 nfsd4_del_conns(ses);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001554 nfsd4_put_drc_mem(&ses->se_fchannel);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001555 __free_session(ses);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001556}
Andy Adamson557ce262009-08-28 08:45:04 -04001557
Fengguang Wu135ae822012-11-10 07:20:25 -05001558static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001559{
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001560 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001561 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001562
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001563 new->se_client = clp;
1564 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001565
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001566 INIT_LIST_HEAD(&new->se_conns);
1567
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001568 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001569 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -04001570 new->se_cb_prog = cses->callback_prog;
J. Bruce Fieldsc6bb3ca2012-11-01 16:31:02 -04001571 new->se_cb_sec = cses->cb_sec;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001572 atomic_set(&new->se_ref, 0);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001573 idx = hash_sessionid(&new->se_sessionid);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001574 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001575 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001576 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001577 spin_unlock(&clp->cl_lock);
Kinglong Mee60810e52014-01-01 00:35:47 +08001578
Chuck Leverb0d2e422014-08-22 15:10:59 -04001579 {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001580 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001581 /*
1582 * This is a little silly; with sessions there's no real
1583 * use for the callback address. Use the peer address
1584 * as a reasonable default for now, but consider fixing
1585 * the rpc client not to require an address in the
1586 * future:
1587 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001588 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1589 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001590 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001591}
1592
Benny Halevy9089f1b2010-05-12 00:12:26 +03001593/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +03001594static struct nfsd4_session *
Trond Myklebustd4e19e702014-06-30 11:48:42 -04001595__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
Marc Eshel5282fd72009-04-03 08:27:52 +03001596{
1597 struct nfsd4_session *elem;
1598 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001599 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Marc Eshel5282fd72009-04-03 08:27:52 +03001600
Trond Myklebust0a880a22014-07-30 08:27:10 -04001601 lockdep_assert_held(&nn->client_lock);
1602
Marc Eshel5282fd72009-04-03 08:27:52 +03001603 dump_sessionid(__func__, sessionid);
1604 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +03001605 /* Search in the appropriate list */
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001606 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +03001607 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1608 NFS4_MAX_SESSIONID_LEN)) {
1609 return elem;
1610 }
1611 }
1612
1613 dprintk("%s: session not found\n", __func__);
1614 return NULL;
1615}
1616
Trond Myklebustd4e19e702014-06-30 11:48:42 -04001617static struct nfsd4_session *
1618find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1619 __be32 *ret)
1620{
1621 struct nfsd4_session *session;
1622 __be32 status = nfserr_badsession;
1623
1624 session = __find_in_sessionid_hashtbl(sessionid, net);
1625 if (!session)
1626 goto out;
1627 status = nfsd4_get_session_locked(session);
1628 if (status)
1629 session = NULL;
1630out:
1631 *ret = status;
1632 return session;
1633}
1634
Benny Halevy9089f1b2010-05-12 00:12:26 +03001635/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +03001636static void
Marc Eshel5282fd72009-04-03 08:27:52 +03001637unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +03001638{
Trond Myklebust0a880a22014-07-30 08:27:10 -04001639 struct nfs4_client *clp = ses->se_client;
1640 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1641
1642 lockdep_assert_held(&nn->client_lock);
1643
Andy Adamson7116ed62009-04-03 08:27:43 +03001644 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001645 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +03001646 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001647 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +03001648}
1649
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1651static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001652STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653{
J. Bruce Fieldsbbc7f332015-01-20 11:51:26 -05001654 /*
1655 * We're assuming the clid was not given out from a boot
1656 * precisely 2^32 (about 136 years) before this one. That seems
1657 * a safe assumption:
1658 */
1659 if (clid->cl_boot == (u32)nn->boot_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +03001661 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001662 clid->cl_boot, clid->cl_id, nn->boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 return 1;
1664}
1665
1666/*
1667 * XXX Should we use a slab cache ?
1668 * This type of memory management is somewhat inefficient, but we use it
1669 * anyway since SETCLIENTID is not a common operation.
1670 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001671static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672{
1673 struct nfs4_client *clp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001674 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001676 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1677 if (clp == NULL)
1678 return NULL;
Thomas Meyer67114fe2011-11-17 23:43:40 +01001679 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
Trond Myklebustd4f04892014-07-29 21:34:36 -04001680 if (clp->cl_name.data == NULL)
1681 goto err_no_name;
1682 clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
1683 OWNER_HASH_SIZE, GFP_KERNEL);
1684 if (!clp->cl_ownerstr_hashtbl)
1685 goto err_no_hashtbl;
1686 for (i = 0; i < OWNER_HASH_SIZE; i++)
1687 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001688 clp->cl_name.len = name.len;
Trond Myklebust5694c932014-04-18 14:43:56 -04001689 INIT_LIST_HEAD(&clp->cl_sessions);
1690 idr_init(&clp->cl_stateids);
1691 atomic_set(&clp->cl_refcount, 0);
1692 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1693 INIT_LIST_HEAD(&clp->cl_idhash);
1694 INIT_LIST_HEAD(&clp->cl_openowners);
1695 INIT_LIST_HEAD(&clp->cl_delegations);
1696 INIT_LIST_HEAD(&clp->cl_lru);
Trond Myklebust5694c932014-04-18 14:43:56 -04001697 INIT_LIST_HEAD(&clp->cl_revoked);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001698#ifdef CONFIG_NFSD_PNFS
1699 INIT_LIST_HEAD(&clp->cl_lo_states);
1700#endif
Trond Myklebust5694c932014-04-18 14:43:56 -04001701 spin_lock_init(&clp->cl_lock);
1702 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 return clp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001704err_no_hashtbl:
1705 kfree(clp->cl_name.data);
1706err_no_name:
1707 kfree(clp);
1708 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709}
1710
Trond Myklebust4dd86e152014-04-18 14:43:58 -04001711static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712free_client(struct nfs4_client *clp)
1713{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001714 while (!list_empty(&clp->cl_sessions)) {
1715 struct nfsd4_session *ses;
1716 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1717 se_perclnt);
1718 list_del(&ses->se_perclnt);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001719 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1720 free_session(ses);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001721 }
Trond Myklebust4cb57e32014-04-18 14:43:57 -04001722 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001723 free_svc_cred(&clp->cl_cred);
Trond Myklebustd4f04892014-07-29 21:34:36 -04001724 kfree(clp->cl_ownerstr_hashtbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 kfree(clp->cl_name.data);
majianpeng2d32b292013-01-29 13:16:06 +08001726 idr_destroy(&clp->cl_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 kfree(clp);
1728}
1729
Benny Halevy84d38ac2010-05-12 00:13:16 +03001730/* must be called under the client_lock */
Trond Myklebust4beb3452014-07-30 08:27:02 -04001731static void
Benny Halevy84d38ac2010-05-12 00:13:16 +03001732unhash_client_locked(struct nfs4_client *clp)
1733{
Trond Myklebust4beb3452014-07-30 08:27:02 -04001734 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001735 struct nfsd4_session *ses;
1736
Trond Myklebust0a880a22014-07-30 08:27:10 -04001737 lockdep_assert_held(&nn->client_lock);
1738
Trond Myklebust4beb3452014-07-30 08:27:02 -04001739 /* Mark the client as expired! */
1740 clp->cl_time = 0;
1741 /* Make it invisible */
1742 if (!list_empty(&clp->cl_idhash)) {
1743 list_del_init(&clp->cl_idhash);
1744 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1745 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1746 else
1747 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1748 }
1749 list_del_init(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001750 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001751 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1752 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001753 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001754}
1755
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756static void
Trond Myklebust4beb3452014-07-30 08:27:02 -04001757unhash_client(struct nfs4_client *clp)
1758{
1759 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1760
1761 spin_lock(&nn->client_lock);
1762 unhash_client_locked(clp);
1763 spin_unlock(&nn->client_lock);
1764}
1765
Jeff Layton97403d92014-07-30 08:27:12 -04001766static __be32 mark_client_expired_locked(struct nfs4_client *clp)
1767{
1768 if (atomic_read(&clp->cl_refcount))
1769 return nfserr_jukebox;
1770 unhash_client_locked(clp);
1771 return nfs_ok;
1772}
1773
Trond Myklebust4beb3452014-07-30 08:27:02 -04001774static void
1775__destroy_client(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001777 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 struct list_head reaplist;
1780
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04001782 spin_lock(&state_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001783 while (!list_empty(&clp->cl_delegations)) {
1784 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
Jeff Layton3fcbbd22015-08-24 12:41:48 -04001785 WARN_ON(!unhash_delegation_locked(dp));
Jeff Layton42690672014-07-25 07:34:20 -04001786 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 }
Benny Halevycdc97502014-05-30 09:09:30 -04001788 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 while (!list_empty(&reaplist)) {
1790 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
Jeff Layton42690672014-07-25 07:34:20 -04001791 list_del_init(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +02001792 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -04001793 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
Trond Myklebust60116952014-07-29 21:34:06 -04001794 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 }
Jeff Layton2d4a5322014-07-25 07:34:21 -04001796 while (!list_empty(&clp->cl_revoked)) {
Andrew Elblec8764862015-02-25 17:46:27 -05001797 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
Jeff Layton2d4a5322014-07-25 07:34:21 -04001798 list_del_init(&dp->dl_recall_lru);
Trond Myklebust60116952014-07-29 21:34:06 -04001799 nfs4_put_stid(&dp->dl_stid);
Benny Halevy956c4fe2013-10-29 11:39:12 +02001800 }
NeilBrownea1da632005-06-23 22:04:17 -07001801 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001802 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
Kinglong Meeb5971af2014-08-22 10:18:43 -04001803 nfs4_get_stateowner(&oo->oo_owner);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001804 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001806 nfsd4_return_all_client_layouts(clp);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001807 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001808 if (clp->cl_cb_conn.cb_xprt)
1809 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001810 free_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811}
1812
Trond Myklebust4beb3452014-07-30 08:27:02 -04001813static void
1814destroy_client(struct nfs4_client *clp)
1815{
1816 unhash_client(clp);
1817 __destroy_client(clp);
1818}
1819
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001820static void expire_client(struct nfs4_client *clp)
1821{
Trond Myklebust4beb3452014-07-30 08:27:02 -04001822 unhash_client(clp);
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001823 nfsd4_client_record_remove(clp);
Trond Myklebust4beb3452014-07-30 08:27:02 -04001824 __destroy_client(clp);
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001825}
1826
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001827static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1828{
1829 memcpy(target->cl_verifier.data, source->data,
1830 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831}
1832
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001833static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1834{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1836 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1837}
1838
J. Bruce Fields50043852015-11-20 15:58:37 -05001839int strdup_if_nonnull(char **target, char *source)
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001840{
J. Bruce Fields50043852015-11-20 15:58:37 -05001841 if (source) {
1842 *target = kstrdup(source, GFP_KERNEL);
1843 if (!*target)
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001844 return -ENOMEM;
1845 } else
J. Bruce Fields50043852015-11-20 15:58:37 -05001846 *target = NULL;
1847 return 0;
1848}
1849
1850static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1851{
1852 int ret;
1853
1854 ret = strdup_if_nonnull(&target->cr_principal, source->cr_principal);
1855 if (ret)
1856 return ret;
J. Bruce Fields414ca012015-11-20 10:48:02 -05001857 ret = strdup_if_nonnull(&target->cr_raw_principal,
1858 source->cr_raw_principal);
1859 if (ret)
1860 return ret;
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001861 target->cr_flavor = source->cr_flavor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862 target->cr_uid = source->cr_uid;
1863 target->cr_gid = source->cr_gid;
1864 target->cr_group_info = source->cr_group_info;
1865 get_group_info(target->cr_group_info);
J. Bruce Fields0dc15312013-05-14 16:07:13 -04001866 target->cr_gss_mech = source->cr_gss_mech;
1867 if (source->cr_gss_mech)
1868 gss_mech_get(source->cr_gss_mech);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001869 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870}
1871
Rasmus Villemoesef17af22014-12-05 16:40:07 +01001872static int
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001873compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1874{
Rasmus Villemoesef17af22014-12-05 16:40:07 +01001875 if (o1->len < o2->len)
1876 return -1;
1877 if (o1->len > o2->len)
1878 return 1;
1879 return memcmp(o1->data, o2->data, o1->len);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001880}
1881
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001882static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001883{
NeilBrowna55370a2005-06-23 22:03:52 -07001884 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885}
1886
1887static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001888same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1889{
1890 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891}
1892
1893static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001894same_clid(clientid_t *cl1, clientid_t *cl2)
1895{
1896 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897}
1898
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001899static bool groups_equal(struct group_info *g1, struct group_info *g2)
1900{
1901 int i;
1902
1903 if (g1->ngroups != g2->ngroups)
1904 return false;
1905 for (i=0; i<g1->ngroups; i++)
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001906 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001907 return false;
1908 return true;
1909}
1910
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001911/*
1912 * RFC 3530 language requires clid_inuse be returned when the
1913 * "principal" associated with a requests differs from that previously
1914 * used. We use uid, gid's, and gss principal string as our best
1915 * approximation. We also don't want to allow non-gss use of a client
1916 * established using gss: in theory cr_principal should catch that
1917 * change, but in practice cr_principal can be null even in the gss case
1918 * since gssd doesn't always pass down a principal string.
1919 */
1920static bool is_gss_cred(struct svc_cred *cr)
1921{
1922 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1923 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1924}
1925
1926
Vivek Trivedi5559b502012-07-24 21:18:20 +05301927static bool
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001928same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1929{
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001930 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001931 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1932 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001933 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1934 return false;
1935 if (cr1->cr_principal == cr2->cr_principal)
1936 return true;
1937 if (!cr1->cr_principal || !cr2->cr_principal)
1938 return false;
Vivek Trivedi5559b502012-07-24 21:18:20 +05301939 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940}
1941
J. Bruce Fields57266a62013-04-13 14:27:29 -04001942static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1943{
1944 struct svc_cred *cr = &rqstp->rq_cred;
1945 u32 service;
1946
J. Bruce Fieldsc4720592013-08-07 11:41:49 -04001947 if (!cr->cr_gss_mech)
1948 return false;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001949 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1950 return service == RPC_GSS_SVC_INTEGRITY ||
1951 service == RPC_GSS_SVC_PRIVACY;
1952}
1953
Andrew Elblededeb132016-06-15 12:52:08 -04001954bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
J. Bruce Fields57266a62013-04-13 14:27:29 -04001955{
1956 struct svc_cred *cr = &rqstp->rq_cred;
1957
1958 if (!cl->cl_mach_cred)
1959 return true;
1960 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1961 return false;
1962 if (!svc_rqst_integrity_protected(rqstp))
1963 return false;
J. Bruce Fields414ca012015-11-20 10:48:02 -05001964 if (cl->cl_cred.cr_raw_principal)
1965 return 0 == strcmp(cl->cl_cred.cr_raw_principal,
1966 cr->cr_raw_principal);
J. Bruce Fields57266a62013-04-13 14:27:29 -04001967 if (!cr->cr_principal)
1968 return false;
1969 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1970}
1971
Jeff Layton294ac322014-07-30 08:27:15 -04001972static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001973{
Chuck Leverab4684d2012-03-02 17:13:50 -05001974 __be32 verf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975
Jeff Laytonf4199922014-06-17 07:44:11 -04001976 /*
1977 * This is opaque to client, so no need to byte-swap. Use
1978 * __force to keep sparse happy
1979 */
1980 verf[0] = (__force __be32)get_seconds();
Kinglong Mee19311aa82015-07-18 07:33:31 +08001981 verf[1] = (__force __be32)nn->clverifier_counter++;
Chuck Leverab4684d2012-03-02 17:13:50 -05001982 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983}
1984
Jeff Layton294ac322014-07-30 08:27:15 -04001985static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
1986{
1987 clp->cl_clientid.cl_boot = nn->boot_time;
1988 clp->cl_clientid.cl_id = nn->clientid_counter++;
1989 gen_confirm(clp, nn);
1990}
1991
Jeff Layton4770d722014-07-29 21:34:10 -04001992static struct nfs4_stid *
1993find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001994{
J. Bruce Fields3abdb602013-02-03 12:23:01 -05001995 struct nfs4_stid *ret;
1996
1997 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1998 if (!ret || !ret->sc_type)
1999 return NULL;
2000 return ret;
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04002001}
2002
Jeff Layton4770d722014-07-29 21:34:10 -04002003static struct nfs4_stid *
Jeff Layton4770d722014-07-29 21:34:10 -04002004find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002005{
2006 struct nfs4_stid *s;
2007
Jeff Layton4770d722014-07-29 21:34:10 -04002008 spin_lock(&cl->cl_lock);
2009 s = find_stateid_locked(cl, t);
Trond Myklebust2d3f9662014-07-29 21:34:25 -04002010 if (s != NULL) {
2011 if (typemask & s->sc_type)
2012 atomic_inc(&s->sc_count);
2013 else
2014 s = NULL;
2015 }
Jeff Layton4770d722014-07-29 21:34:10 -04002016 spin_unlock(&cl->cl_lock);
2017 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04002018}
2019
Jeff Layton2216d442012-11-12 15:00:57 -05002020static struct nfs4_client *create_client(struct xdr_netobj name,
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002021 struct svc_rqst *rqstp, nfs4_verifier *verf)
2022{
2023 struct nfs4_client *clp;
2024 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04002025 int ret;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002026 struct net *net = SVC_NET(rqstp);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002027
2028 clp = alloc_client(name);
2029 if (clp == NULL)
2030 return NULL;
2031
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04002032 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
2033 if (ret) {
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04002034 free_client(clp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04002035 return NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002036 }
Christoph Hellwig0162ac22014-09-24 12:19:19 +02002037 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
Benny Halevy07cd4902010-05-12 00:13:41 +03002038 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002039 clear_bit(0, &clp->cl_cb_slot_busy);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002040 copy_verf(clp, verf);
2041 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04002042 clp->cl_cb_session = NULL;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002043 clp->net = net;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002044 return clp;
2045}
2046
NeilBrownfd39ca92005-06-23 22:04:03 -07002047static void
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002048add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
2049{
2050 struct rb_node **new = &(root->rb_node), *parent = NULL;
2051 struct nfs4_client *clp;
2052
2053 while (*new) {
2054 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
2055 parent = *new;
2056
2057 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
2058 new = &((*new)->rb_left);
2059 else
2060 new = &((*new)->rb_right);
2061 }
2062
2063 rb_link_node(&new_clp->cl_namenode, parent, new);
2064 rb_insert_color(&new_clp->cl_namenode, root);
2065}
2066
2067static struct nfs4_client *
2068find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
2069{
Rasmus Villemoesef17af22014-12-05 16:40:07 +01002070 int cmp;
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002071 struct rb_node *node = root->rb_node;
2072 struct nfs4_client *clp;
2073
2074 while (node) {
2075 clp = rb_entry(node, struct nfs4_client, cl_namenode);
2076 cmp = compare_blob(&clp->cl_name, name);
2077 if (cmp > 0)
2078 node = node->rb_left;
2079 else if (cmp < 0)
2080 node = node->rb_right;
2081 else
2082 return clp;
2083 }
2084 return NULL;
2085}
2086
2087static void
2088add_to_unconfirmed(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089{
2090 unsigned int idhashval;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002091 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092
Trond Myklebust0a880a22014-07-30 08:27:10 -04002093 lockdep_assert_held(&nn->client_lock);
2094
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002095 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002096 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002098 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002099 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100}
2101
NeilBrownfd39ca92005-06-23 22:04:03 -07002102static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103move_to_confirmed(struct nfs4_client *clp)
2104{
2105 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002106 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107
Trond Myklebust0a880a22014-07-30 08:27:10 -04002108 lockdep_assert_held(&nn->client_lock);
2109
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002111 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002112 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002113 add_clp_to_name_tree(clp, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002114 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002115 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116}
2117
2118static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002119find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120{
2121 struct nfs4_client *clp;
2122 unsigned int idhashval = clientid_hashval(clid->cl_id);
2123
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002124 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002125 if (same_clid(&clp->cl_clientid, clid)) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002126 if ((bool)clp->cl_minorversion != sessions)
2127 return NULL;
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002128 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002130 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 }
2132 return NULL;
2133}
2134
2135static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002136find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2137{
2138 struct list_head *tbl = nn->conf_id_hashtbl;
2139
Trond Myklebust0a880a22014-07-30 08:27:10 -04002140 lockdep_assert_held(&nn->client_lock);
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002141 return find_client_in_id_table(tbl, clid, sessions);
2142}
2143
2144static struct nfs4_client *
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002145find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146{
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002147 struct list_head *tbl = nn->unconf_id_hashtbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148
Trond Myklebust0a880a22014-07-30 08:27:10 -04002149 lockdep_assert_held(&nn->client_lock);
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002150 return find_client_in_id_table(tbl, clid, sessions);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151}
2152
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05002153static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03002154{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05002155 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002156}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03002157
NeilBrown28ce6052005-06-23 22:03:56 -07002158static struct nfs4_client *
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002159find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07002160{
Trond Myklebust0a880a22014-07-30 08:27:10 -04002161 lockdep_assert_held(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002162 return find_clp_in_name_tree(name, &nn->conf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07002163}
2164
2165static struct nfs4_client *
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002166find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07002167{
Trond Myklebust0a880a22014-07-30 08:27:10 -04002168 lockdep_assert_held(&nn->client_lock);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002169 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07002170}
2171
NeilBrownfd39ca92005-06-23 22:04:03 -07002172static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002173gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174{
J. Bruce Fields07263f12010-05-31 19:09:40 -04002175 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002176 struct sockaddr *sa = svc_addr(rqstp);
2177 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04002178 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179
Jeff Layton7077ecb2009-08-14 12:57:58 -04002180 /* Currently, we only support tcp and tcp6 for the callback channel */
2181 if (se->se_callback_netid_len == 3 &&
2182 !memcmp(se->se_callback_netid_val, "tcp", 3))
2183 expected_family = AF_INET;
2184 else if (se->se_callback_netid_len == 4 &&
2185 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2186 expected_family = AF_INET6;
2187 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 goto out_err;
2189
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002190 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002191 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04002192 (struct sockaddr *)&conn->cb_addr,
2193 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002194
J. Bruce Fields07263f12010-05-31 19:09:40 -04002195 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002197
J. Bruce Fields07263f12010-05-31 19:09:40 -04002198 if (conn->cb_addr.ss_family == AF_INET6)
2199 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04002200
J. Bruce Fields07263f12010-05-31 19:09:40 -04002201 conn->cb_prog = se->se_callback_prog;
2202 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08002203 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 return;
2205out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04002206 conn->cb_addr.ss_family = AF_UNSPEC;
2207 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07002208 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 "will not receive delegations\n",
2210 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
2211
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 return;
2213}
2214
Andy Adamson074fe892009-04-03 08:28:15 +03002215/*
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04002216 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03002217 */
Trond Myklebustb6076642014-06-30 11:48:35 -04002218static void
Andy Adamson074fe892009-04-03 08:28:15 +03002219nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2220{
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002221 struct xdr_buf *buf = resp->xdr.buf;
Andy Adamson557ce262009-08-28 08:45:04 -04002222 struct nfsd4_slot *slot = resp->cstate.slot;
2223 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03002224
Andy Adamson557ce262009-08-28 08:45:04 -04002225 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03002226
Andy Adamson557ce262009-08-28 08:45:04 -04002227 slot->sl_opcnt = resp->opcnt;
2228 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002229
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002230 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002231 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04002232 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002233 return;
2234 }
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002235 base = resp->cstate.data_offset;
2236 slot->sl_datalen = buf->len - base;
2237 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
Dan Carpenterd3f03402015-11-21 13:28:50 +03002238 WARN(1, "%s: sessions DRC could not cache compound\n",
2239 __func__);
Andy Adamson557ce262009-08-28 08:45:04 -04002240 return;
Andy Adamson074fe892009-04-03 08:28:15 +03002241}
2242
2243/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04002244 * Encode the replay sequence operation from the slot values.
2245 * If cachethis is FALSE encode the uncached rep error on the next
2246 * operation which sets resp->p and increments resp->opcnt for
2247 * nfs4svc_encode_compoundres.
2248 *
Andy Adamson074fe892009-04-03 08:28:15 +03002249 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04002250static __be32
2251nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2252 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03002253{
Andy Adamsonabfabf82009-07-23 19:02:18 -04002254 struct nfsd4_op *op;
2255 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03002256
Andy Adamsonabfabf82009-07-23 19:02:18 -04002257 /* Encode the replayed sequence operation */
2258 op = &args->ops[resp->opcnt - 1];
2259 nfsd4_encode_operation(resp, op);
2260
2261 /* Return nfserr_retry_uncached_rep in next operation. */
J. Bruce Fields73e79482012-02-13 16:39:00 -05002262 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04002263 op = &args->ops[resp->opcnt++];
2264 op->status = nfserr_retry_uncached_rep;
2265 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03002266 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04002267 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03002268}
2269
2270/*
Andy Adamson557ce262009-08-28 08:45:04 -04002271 * The sequence operation is not cached because we can use the slot and
2272 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03002273 */
J. Bruce Fields3ca2eb92014-03-21 12:04:21 -04002274static __be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03002275nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
2276 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03002277{
Andy Adamson557ce262009-08-28 08:45:04 -04002278 struct nfsd4_slot *slot = resp->cstate.slot;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002279 struct xdr_stream *xdr = &resp->xdr;
2280 __be32 *p;
Andy Adamson074fe892009-04-03 08:28:15 +03002281 __be32 status;
2282
Andy Adamson557ce262009-08-28 08:45:04 -04002283 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03002284
Andy Adamsonabfabf82009-07-23 19:02:18 -04002285 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
J. Bruce Fields0da7b192014-03-21 11:43:34 -04002286 if (status)
Andy Adamsonabfabf82009-07-23 19:02:18 -04002287 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03002288
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002289 p = xdr_reserve_space(xdr, slot->sl_datalen);
2290 if (!p) {
2291 WARN_ON_ONCE(1);
2292 return nfserr_serverfault;
2293 }
2294 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
2295 xdr_commit_encode(xdr);
Andy Adamson074fe892009-04-03 08:28:15 +03002296
Andy Adamson557ce262009-08-28 08:45:04 -04002297 resp->opcnt = slot->sl_opcnt;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002298 return slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03002299}
2300
Andy Adamson0733d212009-04-03 08:28:01 +03002301/*
2302 * Set the exchange_id flags returned by the server.
2303 */
2304static void
2305nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
2306{
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002307#ifdef CONFIG_NFSD_PNFS
2308 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
2309#else
Andy Adamson0733d212009-04-03 08:28:01 +03002310 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002311#endif
Andy Adamson0733d212009-04-03 08:28:01 +03002312
2313 /* Referrals are supported, Migration is not. */
2314 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
2315
2316 /* set the wire flags to return to client. */
2317 clid->flags = new->cl_exchange_flags;
2318}
2319
J. Bruce Fields4eaea132015-10-15 16:11:01 -04002320static bool client_has_openowners(struct nfs4_client *clp)
2321{
2322 struct nfs4_openowner *oo;
2323
2324 list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
2325 if (!list_empty(&oo->oo_owner.so_stateids))
2326 return true;
2327 }
2328 return false;
2329}
2330
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002331static bool client_has_state(struct nfs4_client *clp)
2332{
J. Bruce Fields4eaea132015-10-15 16:11:01 -04002333 return client_has_openowners(clp)
Kinglong Mee47e970b2015-07-21 13:09:17 +08002334#ifdef CONFIG_NFSD_PNFS
2335 || !list_empty(&clp->cl_lo_states)
2336#endif
J. Bruce Fields6eccece2012-05-29 16:37:44 -04002337 || !list_empty(&clp->cl_delegations)
2338 || !list_empty(&clp->cl_sessions);
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002339}
2340
Al Virob37ad282006-10-19 23:28:59 -07002341__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03002342nfsd4_exchange_id(struct svc_rqst *rqstp,
2343 struct nfsd4_compound_state *cstate,
2344 struct nfsd4_exchange_id *exid)
2345{
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002346 struct nfs4_client *conf, *new;
2347 struct nfs4_client *unconf = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002348 __be32 status;
Jeff Layton363168b2009-08-14 12:57:56 -04002349 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03002350 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04002351 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04002352 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002353 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamson0733d212009-04-03 08:28:01 +03002354
Jeff Layton363168b2009-08-14 12:57:56 -04002355 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03002356 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04002357 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03002358 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04002359 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03002360
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002361 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03002362 return nfserr_inval;
2363
J. Bruce Fields50c7b942015-11-23 15:39:12 -07002364 new = create_client(exid->clname, rqstp, &verf);
2365 if (new == NULL)
2366 return nfserr_jukebox;
2367
Andy Adamson0733d212009-04-03 08:28:01 +03002368 switch (exid->spa_how) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04002369 case SP4_MACH_CRED:
Andrew Elbleed941642016-06-15 12:52:09 -04002370 exid->spo_must_enforce[0] = 0;
2371 exid->spo_must_enforce[1] = (
2372 1 << (OP_BIND_CONN_TO_SESSION - 32) |
2373 1 << (OP_EXCHANGE_ID - 32) |
2374 1 << (OP_CREATE_SESSION - 32) |
2375 1 << (OP_DESTROY_SESSION - 32) |
2376 1 << (OP_DESTROY_CLIENTID - 32));
2377
2378 exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |
2379 1 << (OP_OPEN_DOWNGRADE) |
2380 1 << (OP_LOCKU) |
2381 1 << (OP_DELEGRETURN));
2382
2383 exid->spo_must_allow[1] &= (
2384 1 << (OP_TEST_STATEID - 32) |
2385 1 << (OP_FREE_STATEID - 32));
J. Bruce Fields50c7b942015-11-23 15:39:12 -07002386 if (!svc_rqst_integrity_protected(rqstp)) {
2387 status = nfserr_inval;
2388 goto out_nolock;
2389 }
J. Bruce Fields920dd9b2015-11-20 16:42:40 -05002390 /*
2391 * Sometimes userspace doesn't give us a principal.
2392 * Which is a bug, really. Anyway, we can't enforce
2393 * MACH_CRED in that case, better to give up now:
2394 */
J. Bruce Fields414ca012015-11-20 10:48:02 -05002395 if (!new->cl_cred.cr_principal &&
2396 !new->cl_cred.cr_raw_principal) {
J. Bruce Fields920dd9b2015-11-20 16:42:40 -05002397 status = nfserr_serverfault;
2398 goto out_nolock;
2399 }
J. Bruce Fields50c7b942015-11-23 15:39:12 -07002400 new->cl_mach_cred = true;
Andy Adamson0733d212009-04-03 08:28:01 +03002401 case SP4_NONE:
2402 break;
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05002403 default: /* checked by xdr code */
2404 WARN_ON_ONCE(1);
Andy Adamson0733d212009-04-03 08:28:01 +03002405 case SP4_SSV:
Kinglong Mee8edf4b02016-02-26 22:36:42 +08002406 status = nfserr_encr_alg_unsupp;
2407 goto out_nolock;
Andy Adamson0733d212009-04-03 08:28:01 +03002408 }
2409
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002410 /* Cases below refer to rfc 5661 section 18.35.4: */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002411 spin_lock(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002412 conf = find_confirmed_client_by_name(&exid->clname, nn);
Andy Adamson0733d212009-04-03 08:28:01 +03002413 if (conf) {
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04002414 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
2415 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
2416
J. Bruce Fields136e6582012-05-12 20:37:23 -04002417 if (update) {
2418 if (!clp_used_exchangeid(conf)) { /* buggy client */
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002419 status = nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03002420 goto out;
2421 }
Andrew Elblededeb132016-06-15 12:52:08 -04002422 if (!nfsd4_mach_creds_match(conf, rqstp)) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04002423 status = nfserr_wrong_cred;
2424 goto out;
2425 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002426 if (!creds_match) { /* case 9 */
Andy Adamson0733d212009-04-03 08:28:01 +03002427 status = nfserr_perm;
2428 goto out;
2429 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002430 if (!verfs_match) { /* case 8 */
Andy Adamson0733d212009-04-03 08:28:01 +03002431 status = nfserr_not_same;
2432 goto out;
2433 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002434 /* case 6 */
2435 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002436 goto out_copy;
Andy Adamson0733d212009-04-03 08:28:01 +03002437 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002438 if (!creds_match) { /* case 3 */
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002439 if (client_has_state(conf)) {
2440 status = nfserr_clid_inuse;
2441 goto out;
2442 }
Andy Adamson0733d212009-04-03 08:28:01 +03002443 goto out_new;
2444 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002445 if (verfs_match) { /* case 2 */
J. Bruce Fields0f1ba0e2012-05-25 21:24:40 -04002446 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002447 goto out_copy;
2448 }
2449 /* case 5, client reboot */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002450 conf = NULL;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002451 goto out_new;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03002452 }
2453
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002454 if (update) { /* case 7 */
Mike Sager6ddbbbf2009-06-16 04:20:47 +03002455 status = nfserr_noent;
2456 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03002457 }
2458
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002459 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002460 if (unconf) /* case 4, possible retry or client restart */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002461 unhash_client_locked(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03002462
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002463 /* case 1 (normal case) */
Andy Adamson0733d212009-04-03 08:28:01 +03002464out_new:
Jeff Laytonfd699b82014-07-30 08:27:14 -04002465 if (conf) {
2466 status = mark_client_expired_locked(conf);
2467 if (status)
2468 goto out;
2469 }
J. Bruce Fields4f540e22013-05-07 11:57:52 -04002470 new->cl_minorversion = cstate->minorversion;
Andrew Elbleed941642016-06-15 12:52:09 -04002471 new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
2472 new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
Andy Adamson0733d212009-04-03 08:28:01 +03002473
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002474 gen_clid(new, nn);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002475 add_to_unconfirmed(new);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002476 swap(new, conf);
Andy Adamson0733d212009-04-03 08:28:01 +03002477out_copy:
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002478 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
2479 exid->clientid.cl_id = conf->cl_clientid.cl_id;
Andy Adamson0733d212009-04-03 08:28:01 +03002480
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002481 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
2482 nfsd4_set_ex_flags(conf, exid);
Andy Adamson0733d212009-04-03 08:28:01 +03002483
2484 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002485 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03002486 status = nfs_ok;
2487
2488out:
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002489 spin_unlock(&nn->client_lock);
J. Bruce Fields50c7b942015-11-23 15:39:12 -07002490out_nolock:
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002491 if (new)
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002492 expire_client(new);
2493 if (unconf)
2494 expire_client(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03002495 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002496}
2497
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002498static __be32
Andy Adamson88e588d2009-07-23 19:02:15 -04002499check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002500{
Andy Adamson88e588d2009-07-23 19:02:15 -04002501 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2502 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002503
2504 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04002505 if (slot_inuse) {
2506 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002507 return nfserr_jukebox;
2508 else
2509 return nfserr_seq_misordered;
2510 }
J. Bruce Fieldsf6d82482012-02-13 16:13:41 -05002511 /* Note unsigned 32-bit arithmetic handles wraparound: */
Andy Adamson88e588d2009-07-23 19:02:15 -04002512 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03002513 return nfs_ok;
Andy Adamson88e588d2009-07-23 19:02:15 -04002514 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002515 return nfserr_replay_cache;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002516 return nfserr_seq_misordered;
2517}
2518
Andy Adamson49557cc2009-07-23 19:02:16 -04002519/*
2520 * Cache the create session result into the create session single DRC
2521 * slot cache by saving the xdr structure. sl_seqid has been set.
2522 * Do this for solo or embedded create session operations.
2523 */
2524static void
2525nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002526 struct nfsd4_clid_slot *slot, __be32 nfserr)
Andy Adamson49557cc2009-07-23 19:02:16 -04002527{
2528 slot->sl_status = nfserr;
2529 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2530}
2531
2532static __be32
2533nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2534 struct nfsd4_clid_slot *slot)
2535{
2536 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2537 return slot->sl_status;
2538}
2539
Mi Jinlong1b74c252011-07-14 14:50:17 +08002540#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2541 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2542 1 + /* MIN tag is length with zero, only length */ \
2543 3 + /* version, opcount, opcode */ \
2544 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2545 /* seqid, slotID, slotID, cache */ \
2546 4 ) * sizeof(__be32))
2547
2548#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2549 2 + /* verifier: AUTH_NULL, length 0 */\
2550 1 + /* status */ \
2551 1 + /* MIN tag is length with zero, only length */ \
2552 3 + /* opcount, opcode, opstatus*/ \
2553 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2554 /* seqid, slotID, slotID, slotID, status */ \
2555 5 ) * sizeof(__be32))
2556
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002557static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
Mi Jinlong1b74c252011-07-14 14:50:17 +08002558{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002559 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2560
J. Bruce Fields373cd402013-04-08 15:42:12 -04002561 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2562 return nfserr_toosmall;
2563 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2564 return nfserr_toosmall;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002565 ca->headerpadsz = 0;
2566 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2567 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2568 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2569 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2570 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2571 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2572 /*
2573 * Note decreasing slot size below client's request may make it
2574 * difficult for client to function correctly, whereas
2575 * decreasing the number of slots will (just?) affect
2576 * performance. When short on memory we therefore prefer to
2577 * decrease number of slots instead of their size. Clients that
2578 * request larger slots than they need will get poor results:
2579 */
2580 ca->maxreqs = nfsd4_get_drc_mem(ca);
2581 if (!ca->maxreqs)
2582 return nfserr_jukebox;
2583
J. Bruce Fields373cd402013-04-08 15:42:12 -04002584 return nfs_ok;
Mi Jinlong1b74c252011-07-14 14:50:17 +08002585}
2586
Chuck Lever45006322016-03-01 13:06:02 -05002587/*
2588 * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
2589 * These are based on similar macros in linux/sunrpc/msg_prot.h .
2590 */
2591#define RPC_MAX_HEADER_WITH_AUTH_SYS \
2592 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2593
2594#define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2595 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2596
Kinglong Mee8a891632013-12-23 18:11:02 +08002597#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
Chuck Lever45006322016-03-01 13:06:02 -05002598 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
Kinglong Mee8a891632013-12-23 18:11:02 +08002599#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
Chuck Lever45006322016-03-01 13:06:02 -05002600 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2601 sizeof(__be32))
Kinglong Mee8a891632013-12-23 18:11:02 +08002602
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002603static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2604{
2605 ca->headerpadsz = 0;
2606
Kinglong Mee8a891632013-12-23 18:11:02 +08002607 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002608 return nfserr_toosmall;
Kinglong Mee8a891632013-12-23 18:11:02 +08002609 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002610 return nfserr_toosmall;
2611 ca->maxresp_cached = 0;
2612 if (ca->maxops < 2)
2613 return nfserr_toosmall;
2614
2615 return nfs_ok;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002616}
2617
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002618static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2619{
2620 switch (cbs->flavor) {
2621 case RPC_AUTH_NULL:
2622 case RPC_AUTH_UNIX:
2623 return nfs_ok;
2624 default:
2625 /*
2626 * GSS case: the spec doesn't allow us to return this
2627 * error. But it also doesn't allow us not to support
2628 * GSS.
2629 * I'd rather this fail hard than return some error the
2630 * client might think it can already handle:
2631 */
2632 return nfserr_encr_alg_unsupp;
2633 }
2634}
2635
Andy Adamson069b6ad2009-04-03 08:27:58 +03002636__be32
2637nfsd4_create_session(struct svc_rqst *rqstp,
2638 struct nfsd4_compound_state *cstate,
2639 struct nfsd4_create_session *cr_ses)
2640{
Jeff Layton363168b2009-08-14 12:57:56 -04002641 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002642 struct nfs4_client *conf, *unconf;
Jeff Laytond20c11d2014-07-30 08:27:07 -04002643 struct nfs4_client *old = NULL;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002644 struct nfsd4_session *new;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002645 struct nfsd4_conn *conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002646 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002647 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002648 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002649
Mi Jinlonga62573d2011-03-23 17:57:07 +08002650 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2651 return nfserr_inval;
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002652 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2653 if (status)
2654 return status;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002655 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
J. Bruce Fields373cd402013-04-08 15:42:12 -04002656 if (status)
2657 return status;
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002658 status = check_backchannel_attrs(&cr_ses->back_channel);
2659 if (status)
Kinglong Meef403e452013-12-23 17:31:21 +08002660 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002661 status = nfserr_jukebox;
Kinglong Mee60810e52014-01-01 00:35:47 +08002662 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002663 if (!new)
2664 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002665 conn = alloc_conn_from_crses(rqstp, cr_ses);
2666 if (!conn)
2667 goto out_free_session;
Mi Jinlonga62573d2011-03-23 17:57:07 +08002668
Jeff Laytond20c11d2014-07-30 08:27:07 -04002669 spin_lock(&nn->client_lock);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002670 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002671 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04002672 WARN_ON_ONCE(conf && unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002673
2674 if (conf) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04002675 status = nfserr_wrong_cred;
Andrew Elblededeb132016-06-15 12:52:08 -04002676 if (!nfsd4_mach_creds_match(conf, rqstp))
J. Bruce Fields57266a62013-04-13 14:27:29 -04002677 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002678 cs_slot = &conf->cl_cs_slot;
2679 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Kinglong Meef5e22bb2015-07-13 17:32:34 +08002680 if (status) {
2681 if (status == nfserr_replay_cache)
2682 status = nfsd4_replay_create_session(cr_ses, cs_slot);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002683 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002684 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002685 } else if (unconf) {
2686 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04002687 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002688 status = nfserr_clid_inuse;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002689 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002690 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002691 status = nfserr_wrong_cred;
Andrew Elblededeb132016-06-15 12:52:08 -04002692 if (!nfsd4_mach_creds_match(unconf, rqstp))
J. Bruce Fields57266a62013-04-13 14:27:29 -04002693 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002694 cs_slot = &unconf->cl_cs_slot;
2695 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03002696 if (status) {
2697 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002698 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002699 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002700 }
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002701 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002702 if (old) {
Jeff Laytond20c11d2014-07-30 08:27:07 -04002703 status = mark_client_expired_locked(old);
Jeff Layton7abea1e2014-07-30 08:27:13 -04002704 if (status) {
2705 old = NULL;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002706 goto out_free_conn;
Jeff Layton7abea1e2014-07-30 08:27:13 -04002707 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04002708 }
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04002709 move_to_confirmed(unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002710 conf = unconf;
2711 } else {
2712 status = nfserr_stale_clientid;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002713 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002714 }
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002715 status = nfs_ok;
Chuck Lever4ce85c82016-03-01 13:05:27 -05002716 /* Persistent sessions are not supported */
J. Bruce Fields408b79b2010-04-15 15:11:09 -04002717 cr_ses->flags &= ~SESSION4_PERSIST;
Chuck Lever4ce85c82016-03-01 13:05:27 -05002718 /* Upshifting from TCP to RDMA is not supported */
J. Bruce Fields408b79b2010-04-15 15:11:09 -04002719 cr_ses->flags &= ~SESSION4_RDMA;
2720
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002721 init_session(rqstp, new, conf, cr_ses);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002722 nfsd4_get_session_locked(new);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002723
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002724 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002725 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04002726 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04002727 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002728
Jeff Laytond20c11d2014-07-30 08:27:07 -04002729 /* cache solo and embedded create sessions under the client_lock */
Andy Adamson49557cc2009-07-23 19:02:16 -04002730 nfsd4_cache_create_session(cr_ses, cs_slot, status);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002731 spin_unlock(&nn->client_lock);
2732 /* init connection and backchannel */
2733 nfsd4_init_conn(rqstp, conn, new);
2734 nfsd4_put_session(new);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002735 if (old)
2736 expire_client(old);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002737 return status;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002738out_free_conn:
Jeff Laytond20c11d2014-07-30 08:27:07 -04002739 spin_unlock(&nn->client_lock);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002740 free_conn(conn);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002741 if (old)
2742 expire_client(old);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002743out_free_session:
2744 __free_session(new);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002745out_release_drc_mem:
2746 nfsd4_put_drc_mem(&cr_ses->fore_channel);
J. Bruce Fields1ca50792013-03-14 18:12:03 -04002747 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002748}
2749
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002750static __be32 nfsd4_map_bcts_dir(u32 *dir)
2751{
2752 switch (*dir) {
2753 case NFS4_CDFC4_FORE:
2754 case NFS4_CDFC4_BACK:
2755 return nfs_ok;
2756 case NFS4_CDFC4_FORE_OR_BOTH:
2757 case NFS4_CDFC4_BACK_OR_BOTH:
2758 *dir = NFS4_CDFC4_BOTH;
2759 return nfs_ok;
2760 };
2761 return nfserr_inval;
2762}
2763
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002764__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2765{
2766 struct nfsd4_session *session = cstate->session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002767 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002768 __be32 status;
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002769
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002770 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2771 if (status)
2772 return status;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002773 spin_lock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002774 session->se_cb_prog = bc->bc_cb_program;
2775 session->se_cb_sec = bc->bc_cb_sec;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002776 spin_unlock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002777
2778 nfsd4_probe_callback(session->se_client);
2779
2780 return nfs_ok;
2781}
2782
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002783__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2784 struct nfsd4_compound_state *cstate,
2785 struct nfsd4_bind_conn_to_session *bcts)
2786{
2787 __be32 status;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002788 struct nfsd4_conn *conn;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002789 struct nfsd4_session *session;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002790 struct net *net = SVC_NET(rqstp);
2791 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002792
2793 if (!nfsd4_last_compound_op(rqstp))
2794 return nfserr_not_only_op;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002795 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002796 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002797 spin_unlock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002798 if (!session)
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002799 goto out_no_session;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002800 status = nfserr_wrong_cred;
Andrew Elblededeb132016-06-15 12:52:08 -04002801 if (!nfsd4_mach_creds_match(session->se_client, rqstp))
J. Bruce Fields57266a62013-04-13 14:27:29 -04002802 goto out;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002803 status = nfsd4_map_bcts_dir(&bcts->dir);
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002804 if (status)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002805 goto out;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002806 conn = alloc_conn(rqstp, bcts->dir);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002807 status = nfserr_jukebox;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002808 if (!conn)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002809 goto out;
2810 nfsd4_init_conn(rqstp, conn, session);
2811 status = nfs_ok;
2812out:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002813 nfsd4_put_session(session);
2814out_no_session:
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002815 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002816}
2817
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002818static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2819{
2820 if (!session)
2821 return 0;
2822 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2823}
2824
Andy Adamson069b6ad2009-04-03 08:27:58 +03002825__be32
2826nfsd4_destroy_session(struct svc_rqst *r,
2827 struct nfsd4_compound_state *cstate,
2828 struct nfsd4_destroy_session *sessionid)
2829{
Benny Halevye10e0cf2009-04-03 08:28:38 +03002830 struct nfsd4_session *ses;
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002831 __be32 status;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002832 int ref_held_by_me = 0;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002833 struct net *net = SVC_NET(r);
2834 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002835
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002836 status = nfserr_not_only_op;
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002837 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04002838 if (!nfsd4_last_compound_op(r))
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002839 goto out;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002840 ref_held_by_me++;
J. Bruce Fields57716352010-04-21 12:27:19 -04002841 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03002842 dump_sessionid(__func__, &sessionid->sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002843 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002844 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002845 if (!ses)
2846 goto out_client_lock;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002847 status = nfserr_wrong_cred;
Andrew Elblededeb132016-06-15 12:52:08 -04002848 if (!nfsd4_mach_creds_match(ses->se_client, r))
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002849 goto out_put_session;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002850 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002851 if (status)
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002852 goto out_put_session;
Benny Halevye10e0cf2009-04-03 08:28:38 +03002853 unhash_session(ses);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002854 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002855
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05002856 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04002857
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002858 spin_lock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002859 status = nfs_ok;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002860out_put_session:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002861 nfsd4_put_session_locked(ses);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002862out_client_lock:
2863 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002864out:
Benny Halevye10e0cf2009-04-03 08:28:38 +03002865 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002866}
2867
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002868static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002869{
2870 struct nfsd4_conn *c;
2871
2872 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002873 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04002874 return c;
2875 }
2876 }
2877 return NULL;
2878}
2879
J. Bruce Fields57266a62013-04-13 14:27:29 -04002880static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002881{
2882 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002883 struct nfsd4_conn *c;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002884 __be32 status = nfs_ok;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002885 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002886
2887 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002888 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002889 if (c)
2890 goto out_free;
2891 status = nfserr_conn_not_bound_to_session;
2892 if (clp->cl_mach_cred)
2893 goto out_free;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002894 __nfsd4_hash_conn(new, ses);
2895 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002896 ret = nfsd4_register_conn(new);
2897 if (ret)
2898 /* oops; xprt is already down: */
2899 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002900 return nfs_ok;
2901out_free:
2902 spin_unlock(&clp->cl_lock);
2903 free_conn(new);
2904 return status;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002905}
2906
Mi Jinlong868b89c2011-04-27 09:09:58 +08002907static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2908{
2909 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2910
2911 return args->opcnt > session->se_fchannel.maxops;
2912}
2913
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002914static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2915 struct nfsd4_session *session)
2916{
2917 struct xdr_buf *xb = &rqstp->rq_arg;
2918
2919 return xb->len > session->se_fchannel.maxreq_sz;
2920}
2921
Andy Adamson069b6ad2009-04-03 08:27:58 +03002922__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03002923nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002924 struct nfsd4_compound_state *cstate,
2925 struct nfsd4_sequence *seq)
2926{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002927 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002928 struct xdr_stream *xdr = &resp->xdr;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002929 struct nfsd4_session *session;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002930 struct nfs4_client *clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002931 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002932 struct nfsd4_conn *conn;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002933 __be32 status;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002934 int buflen;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002935 struct net *net = SVC_NET(rqstp);
2936 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002937
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002938 if (resp->opcnt != 1)
2939 return nfserr_sequence_pos;
2940
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002941 /*
2942 * Will be either used or freed by nfsd4_sequence_check_conn
2943 * below.
2944 */
2945 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2946 if (!conn)
2947 return nfserr_jukebox;
2948
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002949 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002950 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002951 if (!session)
J. Bruce Fields221a6872013-04-01 22:23:49 -04002952 goto out_no_session;
2953 clp = session->se_client;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002954
Mi Jinlong868b89c2011-04-27 09:09:58 +08002955 status = nfserr_too_many_ops;
2956 if (nfsd4_session_too_many_ops(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002957 goto out_put_session;
Mi Jinlong868b89c2011-04-27 09:09:58 +08002958
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002959 status = nfserr_req_too_big;
2960 if (nfsd4_request_too_big(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002961 goto out_put_session;
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002962
Benny Halevyb85d4c02009-04-03 08:28:08 +03002963 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03002964 if (seq->slotid >= session->se_fchannel.maxreqs)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002965 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002966
Andy Adamson557ce262009-08-28 08:45:04 -04002967 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03002968 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2969
Andy Adamsona8dfdae2009-08-28 08:45:02 -04002970 /* We do not negotiate the number of slots yet, so set the
2971 * maxslots to the session maxreqs which is used to encode
2972 * sr_highest_slotid and the sr_target_slot id to maxslots */
2973 seq->maxslots = session->se_fchannel.maxreqs;
2974
J. Bruce Fields73e79482012-02-13 16:39:00 -05002975 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2976 slot->sl_flags & NFSD4_SLOT_INUSE);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002977 if (status == nfserr_replay_cache) {
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002978 status = nfserr_seq_misordered;
2979 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002980 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002981 cstate->slot = slot;
2982 cstate->session = session;
Jeff Layton4b24ca72014-06-30 11:48:44 -04002983 cstate->clp = clp;
Andy Adamsonda3846a2009-04-03 08:28:22 +03002984 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04002985 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03002986 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03002987 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002988 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002989 }
2990 if (status)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002991 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002992
J. Bruce Fields57266a62013-04-13 14:27:29 -04002993 status = nfsd4_sequence_check_conn(conn, session);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002994 conn = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002995 if (status)
2996 goto out_put_session;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002997
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002998 buflen = (seq->cachethis) ?
2999 session->se_fchannel.maxresp_cached :
3000 session->se_fchannel.maxresp_sz;
3001 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
3002 nfserr_rep_too_big;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04003003 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003004 goto out_put_session;
J. Bruce Fields32aaa622014-03-20 20:47:41 -04003005 svc_reserve(rqstp, buflen);
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003006
3007 status = nfs_ok;
Benny Halevyb85d4c02009-04-03 08:28:08 +03003008 /* Success! bump slot seqid */
Benny Halevyb85d4c02009-04-03 08:28:08 +03003009 slot->sl_seqid = seq->seqid;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05003010 slot->sl_flags |= NFSD4_SLOT_INUSE;
J. Bruce Fields73e79482012-02-13 16:39:00 -05003011 if (seq->cachethis)
3012 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05003013 else
3014 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
Benny Halevyb85d4c02009-04-03 08:28:08 +03003015
3016 cstate->slot = slot;
3017 cstate->session = session;
Jeff Layton4b24ca72014-06-30 11:48:44 -04003018 cstate->clp = clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03003019
Benny Halevyb85d4c02009-04-03 08:28:08 +03003020out:
J. Bruce Fields221a6872013-04-01 22:23:49 -04003021 switch (clp->cl_cb_state) {
3022 case NFSD4_CB_DOWN:
3023 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
3024 break;
3025 case NFSD4_CB_FAULT:
3026 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
3027 break;
3028 default:
3029 seq->status_flags = 0;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03003030 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003031 if (!list_empty(&clp->cl_revoked))
3032 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
J. Bruce Fields221a6872013-04-01 22:23:49 -04003033out_no_session:
Kinglong Mee3f42d2c2014-03-24 11:56:59 +08003034 if (conn)
3035 free_conn(conn);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03003036 spin_unlock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03003037 return status;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04003038out_put_session:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04003039 nfsd4_put_session_locked(session);
J. Bruce Fields221a6872013-04-01 22:23:49 -04003040 goto out_no_session;
Andy Adamson069b6ad2009-04-03 08:27:58 +03003041}
3042
Trond Myklebustb6076642014-06-30 11:48:35 -04003043void
3044nfsd4_sequence_done(struct nfsd4_compoundres *resp)
3045{
3046 struct nfsd4_compound_state *cs = &resp->cstate;
3047
3048 if (nfsd4_has_session(cs)) {
Trond Myklebustb6076642014-06-30 11:48:35 -04003049 if (cs->status != nfserr_replay_cache) {
3050 nfsd4_store_cache_entry(resp);
3051 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3052 }
Trond Myklebustd4e19e702014-06-30 11:48:42 -04003053 /* Drop session reference that was taken in nfsd4_sequence() */
Trond Myklebustb6076642014-06-30 11:48:35 -04003054 nfsd4_put_session(cs->session);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003055 } else if (cs->clp)
3056 put_client_renew(cs->clp);
Trond Myklebustb6076642014-06-30 11:48:35 -04003057}
3058
Mi Jinlong345c2842011-10-20 17:51:39 +08003059__be32
3060nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
3061{
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003062 struct nfs4_client *conf, *unconf;
3063 struct nfs4_client *clp = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003064 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03003065 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Mi Jinlong345c2842011-10-20 17:51:39 +08003066
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003067 spin_lock(&nn->client_lock);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03003068 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03003069 conf = find_confirmed_client(&dc->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04003070 WARN_ON_ONCE(conf && unconf);
Mi Jinlong345c2842011-10-20 17:51:39 +08003071
3072 if (conf) {
J. Bruce Fieldsc0293b02013-03-14 18:20:01 -04003073 if (client_has_state(conf)) {
Mi Jinlong345c2842011-10-20 17:51:39 +08003074 status = nfserr_clientid_busy;
3075 goto out;
3076 }
Jeff Laytonfd699b82014-07-30 08:27:14 -04003077 status = mark_client_expired_locked(conf);
3078 if (status)
3079 goto out;
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003080 clp = conf;
Mi Jinlong345c2842011-10-20 17:51:39 +08003081 } else if (unconf)
3082 clp = unconf;
3083 else {
3084 status = nfserr_stale_clientid;
3085 goto out;
3086 }
Andrew Elblededeb132016-06-15 12:52:08 -04003087 if (!nfsd4_mach_creds_match(clp, rqstp)) {
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003088 clp = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04003089 status = nfserr_wrong_cred;
3090 goto out;
3091 }
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003092 unhash_client_locked(clp);
Mi Jinlong345c2842011-10-20 17:51:39 +08003093out:
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003094 spin_unlock(&nn->client_lock);
Trond Myklebust6b10ad12014-07-30 08:27:08 -04003095 if (clp)
3096 expire_client(clp);
Mi Jinlong345c2842011-10-20 17:51:39 +08003097 return status;
3098}
3099
Andy Adamson069b6ad2009-04-03 08:27:58 +03003100__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003101nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
3102{
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003103 __be32 status = 0;
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003104
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003105 if (rc->rca_one_fs) {
3106 if (!cstate->current_fh.fh_dentry)
3107 return nfserr_nofilehandle;
3108 /*
3109 * We don't take advantage of the rca_one_fs case.
3110 * That's OK, it's optional, we can safely ignore it.
3111 */
Christophe JAILLETd28c4422016-07-02 08:24:32 +02003112 return nfs_ok;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003113 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003114
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003115 status = nfserr_complete_already;
Jeff Laytona52d7262012-03-21 09:52:02 -04003116 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
3117 &cstate->session->se_client->cl_flags))
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003118 goto out;
3119
3120 status = nfserr_stale_clientid;
3121 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003122 /*
3123 * The following error isn't really legal.
3124 * But we only get here if the client just explicitly
3125 * destroyed the client. Surely it no longer cares what
3126 * error it gets back on an operation for the dead
3127 * client.
3128 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003129 goto out;
3130
3131 status = nfs_ok;
Jeff Layton2a4317c2012-03-21 16:42:43 -04003132 nfsd4_client_record_create(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003133out:
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003134 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003135}
3136
3137__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003138nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3139 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003140{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04003141 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 nfs4_verifier clverifier = setclid->se_verf;
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003143 struct nfs4_client *conf, *new;
3144 struct nfs4_client *unconf = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003145 __be32 status;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03003146 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3147
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003148 new = create_client(clname, rqstp, &clverifier);
3149 if (new == NULL)
3150 return nfserr_jukebox;
J. Bruce Fields63db4632012-05-18 21:54:19 -04003151 /* Cases below refer to rfc 3530 section 14.2.33: */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003152 spin_lock(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03003153 conf = find_confirmed_client_by_name(&clname, nn);
J. Bruce Fields2b634822015-10-15 15:33:23 -04003154 if (conf && client_has_state(conf)) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04003155 /* case 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05003157 if (clp_used_exchangeid(conf))
3158 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04003159 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04003160 char addr_str[INET6_ADDRSTRLEN];
3161 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
3162 sizeof(addr_str));
3163 dprintk("NFSD: setclientid: string in use by client "
3164 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165 goto out;
3166 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003167 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03003168 unconf = find_unconfirmed_client_by_name(&clname, nn);
J. Bruce Fields8f930712012-05-18 22:06:41 -04003169 if (unconf)
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003170 unhash_client_locked(unconf);
Kinglong Mee41eb1672015-07-13 17:29:41 +08003171 if (conf && same_verf(&conf->cl_verifier, &clverifier)) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04003172 /* case 1: probable callback update */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003173 copy_clid(new, conf);
Kinglong Mee41eb1672015-07-13 17:29:41 +08003174 gen_confirm(new, nn);
3175 } else /* case 4 (new client) or cases 2, 3 (client reboot): */
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03003176 gen_clid(new, nn);
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04003177 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09003178 gen_callback(new, setclid, rqstp);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05003179 add_to_unconfirmed(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003180 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
3181 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
3182 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003183 new = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184 status = nfs_ok;
3185out:
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003186 spin_unlock(&nn->client_lock);
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003187 if (new)
3188 free_client(new);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003189 if (unconf)
3190 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191 return status;
3192}
3193
3194
Al Virob37ad282006-10-19 23:28:59 -07003195__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003196nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
3197 struct nfsd4_compound_state *cstate,
3198 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003199{
NeilBrown21ab45a2005-06-23 22:04:14 -07003200 struct nfs4_client *conf, *unconf;
Jeff Laytond20c11d2014-07-30 08:27:07 -04003201 struct nfs4_client *old = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003202 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
3203 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07003204 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03003205 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003207 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003208 return nfserr_stale_clientid;
NeilBrown21ab45a2005-06-23 22:04:14 -07003209
Jeff Laytond20c11d2014-07-30 08:27:07 -04003210 spin_lock(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03003211 conf = find_confirmed_client(clid, false, nn);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03003212 unconf = find_unconfirmed_client(clid, false, nn);
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05003213 /*
J. Bruce Fields8695b902012-05-19 10:05:58 -04003214 * We try hard to give out unique clientid's, so if we get an
3215 * attempt to confirm the same clientid with a different cred,
J. Bruce Fieldsf984a7c2015-09-01 13:40:53 -04003216 * the client may be buggy; this should never happen.
3217 *
3218 * Nevertheless, RFC 7530 recommends INUSE for this case:
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05003219 */
J. Bruce Fieldsf984a7c2015-09-01 13:40:53 -04003220 status = nfserr_clid_inuse;
J. Bruce Fields8695b902012-05-19 10:05:58 -04003221 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
3222 goto out;
3223 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
3224 goto out;
J. Bruce Fields63db4632012-05-18 21:54:19 -04003225 /* cases below refer to rfc 3530 section 14.2.34: */
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003226 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
3227 if (conf && !unconf) /* case 2: probable retransmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228 status = nfs_ok;
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003229 else /* case 4: client hasn't noticed we rebooted yet? */
3230 status = nfserr_stale_clientid;
3231 goto out;
3232 }
3233 status = nfs_ok;
3234 if (conf) { /* case 1: callback update */
Jeff Laytond20c11d2014-07-30 08:27:07 -04003235 old = unconf;
3236 unhash_client_locked(old);
J. Bruce Fields8695b902012-05-19 10:05:58 -04003237 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003238 } else { /* case 3: normal case; new or rebooted client */
Jeff Laytond20c11d2014-07-30 08:27:07 -04003239 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3240 if (old) {
J. Bruce Fields2b634822015-10-15 15:33:23 -04003241 status = nfserr_clid_inuse;
3242 if (client_has_state(old)
3243 && !same_creds(&unconf->cl_cred,
3244 &old->cl_cred))
3245 goto out;
Jeff Laytond20c11d2014-07-30 08:27:07 -04003246 status = mark_client_expired_locked(old);
Jeff Layton7abea1e2014-07-30 08:27:13 -04003247 if (status) {
3248 old = NULL;
J. Bruce Fields221a6872013-04-01 22:23:49 -04003249 goto out;
Jeff Layton7abea1e2014-07-30 08:27:13 -04003250 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003251 }
J. Bruce Fields8695b902012-05-19 10:05:58 -04003252 move_to_confirmed(unconf);
Jeff Laytond20c11d2014-07-30 08:27:07 -04003253 conf = unconf;
NeilBrown08e89872005-06-23 22:04:11 -07003254 }
Jeff Laytond20c11d2014-07-30 08:27:07 -04003255 get_client_locked(conf);
3256 spin_unlock(&nn->client_lock);
3257 nfsd4_probe_callback(conf);
3258 spin_lock(&nn->client_lock);
3259 put_client_renew_locked(conf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260out:
Jeff Laytond20c11d2014-07-30 08:27:07 -04003261 spin_unlock(&nn->client_lock);
3262 if (old)
3263 expire_client(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264 return status;
3265}
3266
J. Bruce Fields32513b42011-10-13 16:00:16 -04003267static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268{
J. Bruce Fields32513b42011-10-13 16:00:16 -04003269 return kmem_cache_alloc(file_slab, GFP_KERNEL);
3270}
3271
3272/* OPEN Share state helper functions */
Jeff Layton5b095e92014-10-23 08:01:02 -04003273static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
3274 struct nfs4_file *fp)
J. Bruce Fields32513b42011-10-13 16:00:16 -04003275{
Trond Myklebust950e0112014-06-30 11:48:31 -04003276 lockdep_assert_held(&state_lock);
3277
J. Bruce Fields32513b42011-10-13 16:00:16 -04003278 atomic_set(&fp->fi_ref, 1);
Trond Myklebust1d31a252014-07-10 14:07:25 -04003279 spin_lock_init(&fp->fi_lock);
J. Bruce Fields32513b42011-10-13 16:00:16 -04003280 INIT_LIST_HEAD(&fp->fi_stateids);
3281 INIT_LIST_HEAD(&fp->fi_delegations);
Sachin Bhamare8287f002015-04-27 14:50:14 +02003282 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
Trond Myklebuste2cf80d2014-07-23 16:17:38 -04003283 fh_copy_shallow(&fp->fi_fhandle, fh);
Jeff Layton0c637be2014-08-22 12:05:43 -04003284 fp->fi_deleg_file = NULL;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003285 fp->fi_had_conflict = false;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003286 fp->fi_share_deny = 0;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003287 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
3288 memset(fp->fi_access, 0, sizeof(fp->fi_access));
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02003289#ifdef CONFIG_NFSD_PNFS
3290 INIT_LIST_HEAD(&fp->fi_lo_states);
Christoph Hellwigc5c707f2014-09-23 12:38:48 +02003291 atomic_set(&fp->fi_lo_recalls, 0);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02003292#endif
Jeff Layton5b095e92014-10-23 08:01:02 -04003293 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294}
3295
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04003296void
NeilBrowne60d4392005-06-23 22:03:01 -07003297nfsd4_free_slabs(void)
3298{
Sachin Bhamare8287f002015-04-27 14:50:14 +02003299 kmem_cache_destroy(odstate_slab);
Christoph Hellwigabf11352014-05-21 07:43:03 -07003300 kmem_cache_destroy(openowner_slab);
3301 kmem_cache_destroy(lockowner_slab);
3302 kmem_cache_destroy(file_slab);
3303 kmem_cache_destroy(stateid_slab);
3304 kmem_cache_destroy(deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07003305}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306
Bryan Schumaker72083392011-11-01 15:24:59 -04003307int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308nfsd4_init_slabs(void)
3309{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003310 openowner_slab = kmem_cache_create("nfsd4_openowners",
3311 sizeof(struct nfs4_openowner), 0, 0, NULL);
3312 if (openowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003313 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003314 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
Yanchuan Nian3c407942012-10-24 14:44:19 +08003315 sizeof(struct nfs4_lockowner), 0, 0, NULL);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003316 if (lockowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003317 goto out_free_openowner_slab;
NeilBrowne60d4392005-06-23 22:03:01 -07003318 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09003319 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07003320 if (file_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003321 goto out_free_lockowner_slab;
NeilBrown5ac049a2005-06-23 22:03:03 -07003322 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003323 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07003324 if (stateid_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003325 goto out_free_file_slab;
NeilBrown5b2d21c2005-06-23 22:03:04 -07003326 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09003327 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07003328 if (deleg_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003329 goto out_free_stateid_slab;
Sachin Bhamare8287f002015-04-27 14:50:14 +02003330 odstate_slab = kmem_cache_create("nfsd4_odstate",
3331 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
3332 if (odstate_slab == NULL)
3333 goto out_free_deleg_slab;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003334 return 0;
Christoph Hellwigabf11352014-05-21 07:43:03 -07003335
Sachin Bhamare8287f002015-04-27 14:50:14 +02003336out_free_deleg_slab:
3337 kmem_cache_destroy(deleg_slab);
Christoph Hellwigabf11352014-05-21 07:43:03 -07003338out_free_stateid_slab:
3339 kmem_cache_destroy(stateid_slab);
3340out_free_file_slab:
3341 kmem_cache_destroy(file_slab);
3342out_free_lockowner_slab:
3343 kmem_cache_destroy(lockowner_slab);
3344out_free_openowner_slab:
3345 kmem_cache_destroy(openowner_slab);
3346out:
NeilBrowne60d4392005-06-23 22:03:01 -07003347 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3348 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003349}
3350
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003351static void init_nfs4_replay(struct nfs4_replay *rp)
3352{
3353 rp->rp_status = nfserr_serverfault;
3354 rp->rp_buflen = 0;
3355 rp->rp_buf = rp->rp_ibuf;
Jeff Layton58fb12e2014-07-29 21:34:27 -04003356 mutex_init(&rp->rp_mutex);
3357}
3358
3359static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
3360 struct nfs4_stateowner *so)
3361{
3362 if (!nfsd4_has_session(cstate)) {
3363 mutex_lock(&so->so_replay.rp_mutex);
Kinglong Meeb5971af2014-08-22 10:18:43 -04003364 cstate->replay_owner = nfs4_get_stateowner(so);
Jeff Layton58fb12e2014-07-29 21:34:27 -04003365 }
3366}
3367
3368void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
3369{
3370 struct nfs4_stateowner *so = cstate->replay_owner;
3371
3372 if (so != NULL) {
3373 cstate->replay_owner = NULL;
3374 mutex_unlock(&so->so_replay.rp_mutex);
3375 nfs4_put_stateowner(so);
3376 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003377}
3378
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003379static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380{
3381 struct nfs4_stateowner *sop;
3382
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003383 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003384 if (!sop)
3385 return NULL;
3386
3387 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
3388 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003389 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003390 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003391 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003392 sop->so_owner.len = owner->len;
3393
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003394 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003395 sop->so_client = clp;
3396 init_nfs4_replay(&sop->so_replay);
Jeff Layton6b180f02014-07-29 21:34:26 -04003397 atomic_set(&sop->so_count, 1);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003398 return sop;
3399}
3400
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003401static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003402{
Trond Myklebustd4f04892014-07-29 21:34:36 -04003403 lockdep_assert_held(&clp->cl_lock);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03003404
Trond Myklebustd4f04892014-07-29 21:34:36 -04003405 list_add(&oo->oo_owner.so_strhash,
3406 &clp->cl_ownerstr_hashtbl[strhashval]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003407 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003408}
3409
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003410static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
3411{
Trond Myklebustd4f04892014-07-29 21:34:36 -04003412 unhash_openowner_locked(openowner(so));
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003413}
3414
Jeff Layton6b180f02014-07-29 21:34:26 -04003415static void nfs4_free_openowner(struct nfs4_stateowner *so)
3416{
3417 struct nfs4_openowner *oo = openowner(so);
3418
3419 kmem_cache_free(openowner_slab, oo);
3420}
3421
3422static const struct nfs4_stateowner_operations openowner_ops = {
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003423 .so_unhash = nfs4_unhash_openowner,
3424 .so_free = nfs4_free_openowner,
Jeff Layton6b180f02014-07-29 21:34:26 -04003425};
3426
Andrew Elble7fc05642015-11-05 20:42:43 -05003427static struct nfs4_ol_stateid *
3428nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
3429{
3430 struct nfs4_ol_stateid *local, *ret = NULL;
3431 struct nfs4_openowner *oo = open->op_openowner;
3432
3433 lockdep_assert_held(&fp->fi_lock);
3434
3435 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3436 /* ignore lock owners */
3437 if (local->st_stateowner->so_is_open_owner == 0)
3438 continue;
3439 if (local->st_stateowner == &oo->oo_owner) {
3440 ret = local;
3441 atomic_inc(&ret->st_stid.sc_count);
3442 break;
3443 }
3444 }
3445 return ret;
3446}
3447
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003448static struct nfs4_openowner *
Trond Myklebust13d6f662014-06-30 11:48:45 -04003449alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
Jeff Laytondb24b3b2014-06-30 11:48:36 -04003450 struct nfsd4_compound_state *cstate)
3451{
Trond Myklebust13d6f662014-06-30 11:48:45 -04003452 struct nfs4_client *clp = cstate->clp;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04003453 struct nfs4_openowner *oo, *ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003454
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003455 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
3456 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 return NULL;
Jeff Layton6b180f02014-07-29 21:34:26 -04003458 oo->oo_owner.so_ops = &openowner_ops;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003459 oo->oo_owner.so_is_open_owner = 1;
3460 oo->oo_owner.so_seqid = open->op_seqid;
Jeff Laytond3134b12014-07-29 21:34:32 -04003461 oo->oo_flags = 0;
Jeff Laytondb24b3b2014-06-30 11:48:36 -04003462 if (nfsd4_has_session(cstate))
3463 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003464 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003465 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003466 INIT_LIST_HEAD(&oo->oo_close_lru);
Trond Myklebustd4f04892014-07-29 21:34:36 -04003467 spin_lock(&clp->cl_lock);
3468 ret = find_openstateowner_str_locked(strhashval, open, clp);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04003469 if (ret == NULL) {
3470 hash_openowner(oo, clp, strhashval);
3471 ret = oo;
3472 } else
Kinglong Meed50ffde2015-07-16 12:05:07 +08003473 nfs4_free_stateowner(&oo->oo_owner);
3474
Trond Myklebustd4f04892014-07-29 21:34:36 -04003475 spin_unlock(&clp->cl_lock);
Jeff Laytonc5952332015-03-23 10:53:42 -04003476 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477}
3478
Andrew Elble7fc05642015-11-05 20:42:43 -05003479static struct nfs4_ol_stateid *
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003480init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
Andrew Elble7fc05642015-11-05 20:42:43 -05003481{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003482
Andrew Elble7fc05642015-11-05 20:42:43 -05003483 struct nfs4_openowner *oo = open->op_openowner;
3484 struct nfs4_ol_stateid *retstp = NULL;
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003485 struct nfs4_ol_stateid *stp;
Andrew Elble7fc05642015-11-05 20:42:43 -05003486
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003487 stp = open->op_stp;
Oleg Drokin5cc1fb22016-06-14 23:28:05 -04003488 /* We are moving these outside of the spinlocks to avoid the warnings */
3489 mutex_init(&stp->st_mutex);
3490 mutex_lock(&stp->st_mutex);
3491
Andrew Elble7fc05642015-11-05 20:42:43 -05003492 spin_lock(&oo->oo_owner.so_client->cl_lock);
3493 spin_lock(&fp->fi_lock);
3494
3495 retstp = nfsd4_find_existing_open(fp, open);
3496 if (retstp)
3497 goto out_unlock;
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003498
3499 open->op_stp = NULL;
Trond Myklebustd6f2bc52014-07-29 21:34:19 -04003500 atomic_inc(&stp->st_stid.sc_count);
J. Bruce Fields3abdb602013-02-03 12:23:01 -05003501 stp->st_stid.sc_type = NFS4_OPEN_STID;
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04003502 INIT_LIST_HEAD(&stp->st_locks);
Kinglong Meeb5971af2014-08-22 10:18:43 -04003503 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
NeilBrown13cd2182005-06-23 22:03:10 -07003504 get_nfs4_file(fp);
Trond Myklebust11b91642014-07-29 21:34:08 -04003505 stp->st_stid.sc_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003506 stp->st_access_bmap = 0;
3507 stp->st_deny_bmap = 0;
NeilBrown4c4cd222005-07-07 17:59:27 -07003508 stp->st_openstp = NULL;
Jeff Layton1c755dc2014-07-29 21:34:12 -04003509 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
Trond Myklebust1d31a252014-07-10 14:07:25 -04003510 list_add(&stp->st_perfile, &fp->fi_stateids);
Andrew Elble7fc05642015-11-05 20:42:43 -05003511
3512out_unlock:
Trond Myklebust1d31a252014-07-10 14:07:25 -04003513 spin_unlock(&fp->fi_lock);
Jeff Layton1c755dc2014-07-29 21:34:12 -04003514 spin_unlock(&oo->oo_owner.so_client->cl_lock);
Oleg Drokin5cc1fb22016-06-14 23:28:05 -04003515 if (retstp) {
3516 mutex_lock(&retstp->st_mutex);
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003517 /* To keep mutex tracking happy */
Oleg Drokin5cc1fb22016-06-14 23:28:05 -04003518 mutex_unlock(&stp->st_mutex);
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003519 stp = retstp;
Oleg Drokin5cc1fb22016-06-14 23:28:05 -04003520 }
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04003521 return stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003522}
3523
Jeff Laytond3134b12014-07-29 21:34:32 -04003524/*
3525 * In the 4.0 case we need to keep the owners around a little while to handle
3526 * CLOSE replay. We still do need to release any file access that is held by
3527 * them before returning however.
3528 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003529static void
Jeff Laytond3134b12014-07-29 21:34:32 -04003530move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003531{
Jeff Layton217526e2014-07-30 08:27:11 -04003532 struct nfs4_ol_stateid *last;
Jeff Laytond3134b12014-07-29 21:34:32 -04003533 struct nfs4_openowner *oo = openowner(s->st_stateowner);
3534 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
3535 nfsd_net_id);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003536
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003537 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003538
Jeff Laytonb401be222014-07-29 21:34:33 -04003539 /*
3540 * We know that we hold one reference via nfsd4_close, and another
3541 * "persistent" reference for the client. If the refcount is higher
3542 * than 2, then there are still calls in progress that are using this
3543 * stateid. We can't put the sc_file reference until they are finished.
3544 * Wait for the refcount to drop to 2. Since it has been unhashed,
3545 * there should be no danger of the refcount going back up again at
3546 * this point.
3547 */
3548 wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2);
3549
Jeff Laytond3134b12014-07-29 21:34:32 -04003550 release_all_access(s);
3551 if (s->st_stid.sc_file) {
3552 put_nfs4_file(s->st_stid.sc_file);
3553 s->st_stid.sc_file = NULL;
3554 }
Jeff Layton217526e2014-07-30 08:27:11 -04003555
3556 spin_lock(&nn->client_lock);
3557 last = oo->oo_last_closed_stid;
Jeff Laytond3134b12014-07-29 21:34:32 -04003558 oo->oo_last_closed_stid = s;
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003559 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003560 oo->oo_time = get_seconds();
Jeff Layton217526e2014-07-30 08:27:11 -04003561 spin_unlock(&nn->client_lock);
3562 if (last)
3563 nfs4_put_stid(&last->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003564}
3565
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566/* search file_hashtbl[] for file */
3567static struct nfs4_file *
Jeff Layton5b095e92014-10-23 08:01:02 -04003568find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003569{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003570 struct nfs4_file *fp;
3571
Jeff Layton5b095e92014-10-23 08:01:02 -04003572 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
Christoph Hellwig4d94c2e2014-08-14 08:41:48 +02003573 if (fh_match(&fp->fi_fhandle, fh)) {
Jeff Layton5b095e92014-10-23 08:01:02 -04003574 if (atomic_inc_not_zero(&fp->fi_ref))
3575 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07003576 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003577 }
3578 return NULL;
3579}
3580
Christoph Hellwige6ba76e2014-08-14 08:50:16 +02003581struct nfs4_file *
Trond Myklebustca943212014-07-23 16:17:39 -04003582find_file(struct knfsd_fh *fh)
Trond Myklebust950e0112014-06-30 11:48:31 -04003583{
3584 struct nfs4_file *fp;
Jeff Layton5b095e92014-10-23 08:01:02 -04003585 unsigned int hashval = file_hashval(fh);
Trond Myklebust950e0112014-06-30 11:48:31 -04003586
Jeff Layton5b095e92014-10-23 08:01:02 -04003587 rcu_read_lock();
3588 fp = find_file_locked(fh, hashval);
3589 rcu_read_unlock();
Trond Myklebust950e0112014-06-30 11:48:31 -04003590 return fp;
3591}
3592
3593static struct nfs4_file *
Jeff Laytonf9c00c32014-07-23 16:17:41 -04003594find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
Trond Myklebust950e0112014-06-30 11:48:31 -04003595{
3596 struct nfs4_file *fp;
Jeff Layton5b095e92014-10-23 08:01:02 -04003597 unsigned int hashval = file_hashval(fh);
3598
3599 rcu_read_lock();
3600 fp = find_file_locked(fh, hashval);
3601 rcu_read_unlock();
3602 if (fp)
3603 return fp;
Trond Myklebust950e0112014-06-30 11:48:31 -04003604
3605 spin_lock(&state_lock);
Jeff Layton5b095e92014-10-23 08:01:02 -04003606 fp = find_file_locked(fh, hashval);
3607 if (likely(fp == NULL)) {
3608 nfsd4_init_file(fh, hashval, new);
Trond Myklebust950e0112014-06-30 11:48:31 -04003609 fp = new;
3610 }
3611 spin_unlock(&state_lock);
3612
3613 return fp;
3614}
3615
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04003616/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003617 * Called to check deny when READ with all zero stateid or
3618 * WRITE with all zero or all one stateid
3619 */
Al Virob37ad282006-10-19 23:28:59 -07003620static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003621nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3622{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623 struct nfs4_file *fp;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003624 __be32 ret = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625
Trond Myklebustca943212014-07-23 16:17:39 -04003626 fp = find_file(&current_fh->fh_handle);
NeilBrown13cd2182005-06-23 22:03:10 -07003627 if (!fp)
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003628 return ret;
3629 /* Check for conflicting share reservations */
Trond Myklebust1d31a252014-07-10 14:07:25 -04003630 spin_lock(&fp->fi_lock);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003631 if (fp->fi_share_deny & deny_type)
3632 ret = nfserr_locked;
Trond Myklebust1d31a252014-07-10 14:07:25 -04003633 spin_unlock(&fp->fi_lock);
NeilBrown13cd2182005-06-23 22:03:10 -07003634 put_nfs4_file(fp);
3635 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636}
3637
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003638static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639{
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003640 struct nfs4_delegation *dp = cb_to_delegation(cb);
Trond Myklebust11b91642014-07-29 21:34:08 -04003641 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
3642 nfsd_net_id);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04003643
Trond Myklebust11b91642014-07-29 21:34:08 -04003644 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
Jeff Laytonf54fe962014-07-25 07:34:26 -04003645
Jeff Layton02e12152014-07-16 10:31:57 -04003646 /*
3647 * We can't do this in nfsd_break_deleg_cb because it is
Jeff Laytonf54fe962014-07-25 07:34:26 -04003648 * already holding inode->i_lock.
3649 *
Jeff Laytondff13992014-07-08 14:02:49 -04003650 * If the dl_time != 0, then we know that it has already been
3651 * queued for a lease break. Don't queue it again.
3652 */
Jeff Laytonf54fe962014-07-25 07:34:26 -04003653 spin_lock(&state_lock);
Jeff Laytondff13992014-07-08 14:02:49 -04003654 if (dp->dl_time == 0) {
Jeff Laytondff13992014-07-08 14:02:49 -04003655 dp->dl_time = get_seconds();
Jeff Layton02e12152014-07-16 10:31:57 -04003656 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
Jeff Laytondff13992014-07-08 14:02:49 -04003657 }
Jeff Layton02e12152014-07-16 10:31:57 -04003658 spin_unlock(&state_lock);
3659}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003661static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
3662 struct rpc_task *task)
3663{
3664 struct nfs4_delegation *dp = cb_to_delegation(cb);
3665
Andrew Elblea4579742015-08-31 12:06:41 -04003666 if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID)
3667 return 1;
3668
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003669 switch (task->tk_status) {
3670 case 0:
3671 return 1;
3672 case -EBADHANDLE:
3673 case -NFS4ERR_BAD_STATEID:
3674 /*
3675 * Race: client probably got cb_recall before open reply
3676 * granting delegation.
3677 */
3678 if (dp->dl_retries--) {
3679 rpc_delay(task, 2 * HZ);
3680 return 0;
3681 }
3682 /*FALLTHRU*/
3683 default:
3684 return -1;
3685 }
3686}
3687
3688static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
3689{
3690 struct nfs4_delegation *dp = cb_to_delegation(cb);
3691
3692 nfs4_put_stid(&dp->dl_stid);
3693}
3694
Julia Lawallc4cb8972015-11-21 22:57:39 +01003695static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003696 .prepare = nfsd4_cb_recall_prepare,
3697 .done = nfsd4_cb_recall_done,
3698 .release = nfsd4_cb_recall_release,
3699};
3700
Jeff Layton02e12152014-07-16 10:31:57 -04003701static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3702{
3703 /*
3704 * We're assuming the state code never drops its reference
3705 * without first removing the lease. Since we're in this lease
3706 * callback (and since the lease code is serialized by the kernel
3707 * lock) we know the server hasn't removed the lease yet, we know
3708 * it's safe to take a reference.
3709 */
Trond Myklebust72c0b0f2014-07-21 09:34:58 -04003710 atomic_inc(&dp->dl_stid.sc_count);
Christoph Hellwigf0b5de12014-09-24 12:19:18 +02003711 nfsd4_run_cb(&dp->dl_recall);
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003712}
3713
Jeff Layton1c8c6012013-06-21 08:58:15 -04003714/* Called from break_lease() with i_lock held. */
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003715static bool
3716nfsd_break_deleg_cb(struct file_lock *fl)
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003717{
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003718 bool ret = false;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003719 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
3720 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003721
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003722 if (!fp) {
3723 WARN(1, "(%p)->fl_owner NULL\n", fl);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003724 return ret;
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003725 }
3726 if (fp->fi_had_conflict) {
3727 WARN(1, "duplicate break on %p\n", fp);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003728 return ret;
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003729 }
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04003730 /*
3731 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003732 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003733 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04003734 */
3735 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003736
Jeff Layton02e12152014-07-16 10:31:57 -04003737 spin_lock(&fp->fi_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04003738 fp->fi_had_conflict = true;
3739 /*
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003740 * If there are no delegations on the list, then return true
3741 * so that the lease code will go ahead and delete it.
Jeff Layton417c6622014-07-21 09:34:57 -04003742 */
3743 if (list_empty(&fp->fi_delegations))
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003744 ret = true;
Jeff Layton417c6622014-07-21 09:34:57 -04003745 else
3746 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
3747 nfsd_break_one_deleg(dp);
Jeff Layton02e12152014-07-16 10:31:57 -04003748 spin_unlock(&fp->fi_lock);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003749 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003750}
3751
Jeff Laytonc45198e2014-09-01 07:12:07 -04003752static int
Jeff Layton7448cc32015-01-16 15:05:57 -05003753nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
3754 struct list_head *dispose)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003755{
3756 if (arg & F_UNLCK)
Jeff Laytonc45198e2014-09-01 07:12:07 -04003757 return lease_modify(onlist, arg, dispose);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758 else
3759 return -EAGAIN;
3760}
3761
Alexey Dobriyan7b021962009-09-21 17:01:12 -07003762static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04003763 .lm_break = nfsd_break_deleg_cb,
3764 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765};
3766
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003767static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3768{
3769 if (nfsd4_has_session(cstate))
3770 return nfs_ok;
3771 if (seqid == so->so_seqid - 1)
3772 return nfserr_replay_me;
3773 if (seqid == so->so_seqid)
3774 return nfs_ok;
3775 return nfserr_bad_seqid;
3776}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003777
Jeff Layton4b24ca72014-06-30 11:48:44 -04003778static __be32 lookup_clientid(clientid_t *clid,
3779 struct nfsd4_compound_state *cstate,
3780 struct nfsd_net *nn)
3781{
3782 struct nfs4_client *found;
3783
3784 if (cstate->clp) {
3785 found = cstate->clp;
3786 if (!same_clid(&found->cl_clientid, clid))
3787 return nfserr_stale_clientid;
3788 return nfs_ok;
3789 }
3790
3791 if (STALE_CLIENTID(clid, nn))
3792 return nfserr_stale_clientid;
3793
3794 /*
3795 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3796 * cached already then we know this is for is for v4.0 and "sessions"
3797 * will be false.
3798 */
3799 WARN_ON_ONCE(cstate->session);
Trond Myklebust3e339f92014-07-30 08:27:09 -04003800 spin_lock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003801 found = find_confirmed_client(clid, false, nn);
Trond Myklebust3e339f92014-07-30 08:27:09 -04003802 if (!found) {
3803 spin_unlock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003804 return nfserr_expired;
Trond Myklebust3e339f92014-07-30 08:27:09 -04003805 }
3806 atomic_inc(&found->cl_refcount);
3807 spin_unlock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003808
3809 /* Cache the nfs4_client in cstate! */
3810 cstate->clp = found;
Jeff Layton4b24ca72014-06-30 11:48:44 -04003811 return nfs_ok;
3812}
3813
Al Virob37ad282006-10-19 23:28:59 -07003814__be32
Andy Adamson66689582009-04-03 08:28:45 +03003815nfsd4_process_open1(struct nfsd4_compound_state *cstate,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003816 struct nfsd4_open *open, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003817{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003818 clientid_t *clientid = &open->op_clientid;
3819 struct nfs4_client *clp = NULL;
3820 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003821 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003822 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003823
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003824 if (STALE_CLIENTID(&open->op_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003825 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003826 /*
3827 * In case we need it later, after we've already created the
3828 * file and don't want to risk a further failure:
3829 */
3830 open->op_file = nfsd4_alloc_file();
3831 if (open->op_file == NULL)
3832 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003833
Trond Myklebust2d91e892014-06-30 11:48:46 -04003834 status = lookup_clientid(clientid, cstate, nn);
3835 if (status)
3836 return status;
3837 clp = cstate->clp;
3838
Trond Myklebustd4f04892014-07-29 21:34:36 -04003839 strhashval = ownerstr_hashval(&open->op_owner);
3840 oo = find_openstateowner_str(strhashval, open, clp);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003841 open->op_openowner = oo;
3842 if (!oo) {
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003843 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003844 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003845 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003846 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003847 release_openowner(oo);
3848 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003849 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003850 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003851 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3852 if (status)
3853 return status;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003854 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003855new_owner:
Trond Myklebust13d6f662014-06-30 11:48:45 -04003856 oo = alloc_init_open_stateowner(strhashval, open, cstate);
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003857 if (oo == NULL)
3858 return nfserr_jukebox;
3859 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003860alloc_stateid:
Jeff Laytonb49e0842014-07-29 21:34:11 -04003861 open->op_stp = nfs4_alloc_open_stateid(clp);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003862 if (!open->op_stp)
3863 return nfserr_jukebox;
Sachin Bhamare8287f002015-04-27 14:50:14 +02003864
3865 if (nfsd4_has_session(cstate) &&
3866 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
3867 open->op_odstate = alloc_clnt_odstate(clp);
3868 if (!open->op_odstate)
3869 return nfserr_jukebox;
3870 }
3871
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003872 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873}
3874
Al Virob37ad282006-10-19 23:28:59 -07003875static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07003876nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3877{
3878 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3879 return nfserr_openmode;
3880 else
3881 return nfs_ok;
3882}
3883
Daniel Mackc47d8322011-05-16 16:38:14 +02003884static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04003885{
J. Bruce Fields24a01112010-05-18 20:01:35 -04003886 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3887}
3888
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003889static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04003890{
3891 struct nfs4_stid *ret;
3892
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003893 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04003894 if (!ret)
3895 return NULL;
3896 return delegstateid(ret);
3897}
3898
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003899static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3900{
3901 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3902 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3903}
3904
Al Virob37ad282006-10-19 23:28:59 -07003905static __be32
J. Bruce Fields41d22662013-03-21 15:49:47 -04003906nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07003907 struct nfs4_delegation **dp)
3908{
3909 int flags;
Al Virob37ad282006-10-19 23:28:59 -07003910 __be32 status = nfserr_bad_stateid;
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003911 struct nfs4_delegation *deleg;
NeilBrown567d9822005-06-23 22:02:53 -07003912
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003913 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
3914 if (deleg == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07003915 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04003916 flags = share_access_to_flags(open->op_share_access);
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003917 status = nfs4_check_delegmode(deleg, flags);
3918 if (status) {
3919 nfs4_put_stid(&deleg->dl_stid);
3920 goto out;
3921 }
3922 *dp = deleg;
NeilBrownc44c5ee2005-06-23 22:02:54 -07003923out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003924 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07003925 return nfs_ok;
3926 if (status)
3927 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003928 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07003929 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07003930}
3931
J. Bruce Fields21fb4012010-07-28 12:21:23 -04003932static inline int nfs4_access_to_access(u32 nfs4_access)
3933{
3934 int flags = 0;
3935
3936 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
3937 flags |= NFSD_MAY_READ;
3938 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
3939 flags |= NFSD_MAY_WRITE;
3940 return flags;
3941}
3942
Al Virob37ad282006-10-19 23:28:59 -07003943static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
3945 struct nfsd4_open *open)
3946{
3947 struct iattr iattr = {
3948 .ia_valid = ATTR_SIZE,
3949 .ia_size = 0,
3950 };
3951 if (!open->op_truncate)
3952 return 0;
3953 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08003954 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
3956}
3957
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003958static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04003959 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
3960 struct nfsd4_open *open)
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003961{
Trond Myklebustde186432014-07-10 14:07:26 -04003962 struct file *filp = NULL;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003963 __be32 status;
3964 int oflag = nfs4_access_to_omode(open->op_share_access);
3965 int access = nfs4_access_to_access(open->op_share_access);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003966 unsigned char old_access_bmap, old_deny_bmap;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003967
Trond Myklebustde186432014-07-10 14:07:26 -04003968 spin_lock(&fp->fi_lock);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003969
3970 /*
3971 * Are we trying to set a deny mode that would conflict with
3972 * current access?
3973 */
3974 status = nfs4_file_check_deny(fp, open->op_share_deny);
3975 if (status != nfs_ok) {
3976 spin_unlock(&fp->fi_lock);
3977 goto out;
3978 }
3979
3980 /* set access to the file */
3981 status = nfs4_file_get_access(fp, open->op_share_access);
3982 if (status != nfs_ok) {
3983 spin_unlock(&fp->fi_lock);
3984 goto out;
3985 }
3986
3987 /* Set access bits in stateid */
3988 old_access_bmap = stp->st_access_bmap;
3989 set_access(open->op_share_access, stp);
3990
3991 /* Set new deny mask */
3992 old_deny_bmap = stp->st_deny_bmap;
3993 set_deny(open->op_share_deny, stp);
3994 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
3995
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003996 if (!fp->fi_fds[oflag]) {
Trond Myklebustde186432014-07-10 14:07:26 -04003997 spin_unlock(&fp->fi_lock);
3998 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003999 if (status)
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004000 goto out_put_access;
Trond Myklebustde186432014-07-10 14:07:26 -04004001 spin_lock(&fp->fi_lock);
4002 if (!fp->fi_fds[oflag]) {
4003 fp->fi_fds[oflag] = filp;
4004 filp = NULL;
4005 }
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04004006 }
Trond Myklebustde186432014-07-10 14:07:26 -04004007 spin_unlock(&fp->fi_lock);
4008 if (filp)
4009 fput(filp);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04004010
4011 status = nfsd4_truncate(rqstp, cur_fh, open);
4012 if (status)
4013 goto out_put_access;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04004014out:
4015 return status;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004016out_put_access:
4017 stp->st_access_bmap = old_access_bmap;
4018 nfs4_file_put_access(fp, open->op_share_access);
4019 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
4020 goto out;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04004021}
4022
Al Virob37ad282006-10-19 23:28:59 -07004023static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004024nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004025{
Al Virob37ad282006-10-19 23:28:59 -07004026 __be32 status;
Arnd Bergmann6ac75362015-05-12 23:31:29 +02004027 unsigned char old_deny_bmap = stp->st_deny_bmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004028
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04004029 if (!test_access(open->op_share_access, stp))
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004030 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04004031
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004032 /* test and set deny mode */
4033 spin_lock(&fp->fi_lock);
4034 status = nfs4_file_check_deny(fp, open->op_share_deny);
4035 if (status == nfs_ok) {
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004036 set_deny(open->op_share_deny, stp);
4037 fp->fi_share_deny |=
4038 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4039 }
4040 spin_unlock(&fp->fi_lock);
4041
4042 if (status != nfs_ok)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004043 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004044
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04004045 status = nfsd4_truncate(rqstp, cur_fh, open);
4046 if (status != nfs_ok)
4047 reset_union_bmap_deny(old_deny_bmap, stp);
4048 return status;
4049}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004050
J. Bruce Fields14a24e92010-12-10 19:02:49 -05004051/* Should we give out recallable state?: */
4052static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
4053{
4054 if (clp->cl_cb_state == NFSD4_CB_UP)
4055 return true;
4056 /*
4057 * In the sessions case, since we don't have to establish a
4058 * separate connection for callbacks, we assume it's OK
4059 * until we hear otherwise:
4060 */
4061 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
4062}
4063
Jeff Laytond564fbe2014-07-16 10:31:58 -04004064static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag)
J. Bruce Fields22d38c42011-01-31 11:55:12 -05004065{
4066 struct file_lock *fl;
4067
4068 fl = locks_alloc_lock();
4069 if (!fl)
4070 return NULL;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05004071 fl->fl_lmops = &nfsd_lease_mng_ops;
J. Bruce Fields617588d2011-07-01 15:18:34 -04004072 fl->fl_flags = FL_DELEG;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05004073 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
4074 fl->fl_end = OFFSET_MAX;
Jeff Laytond564fbe2014-07-16 10:31:58 -04004075 fl->fl_owner = (fl_owner_t)fp;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05004076 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05004077 return fl;
4078}
4079
Andrew Elble34ed9872015-10-15 12:07:28 -04004080/**
4081 * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer
4082 * @dp: a pointer to the nfs4_delegation we're adding.
4083 *
4084 * Return:
4085 * On success: Return code will be 0 on success.
4086 *
4087 * On error: -EAGAIN if there was an existing delegation.
4088 * nonzero if there is an error in other cases.
4089 *
4090 */
4091
J. Bruce Fields99c41512013-05-21 16:21:25 -04004092static int nfs4_setlease(struct nfs4_delegation *dp)
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05004093{
Trond Myklebust11b91642014-07-29 21:34:08 -04004094 struct nfs4_file *fp = dp->dl_stid.sc_file;
Kinglong Meeefde6b42015-07-13 17:33:24 +08004095 struct file_lock *fl;
Jeff Layton417c6622014-07-21 09:34:57 -04004096 struct file *filp;
4097 int status = 0;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05004098
Jeff Laytond564fbe2014-07-16 10:31:58 -04004099 fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05004100 if (!fl)
4101 return -ENOMEM;
Jeff Layton417c6622014-07-21 09:34:57 -04004102 filp = find_readable_file(fp);
4103 if (!filp) {
4104 /* We should always have a readable file here */
4105 WARN_ON_ONCE(1);
Kinglong Meeaf9dbaf2015-07-13 17:30:51 +08004106 locks_free_lock(fl);
Jeff Layton417c6622014-07-21 09:34:57 -04004107 return -EBADF;
4108 }
4109 fl->fl_file = filp;
Jeff Laytone6f5c782014-08-22 10:40:25 -04004110 status = vfs_setlease(filp, fl->fl_type, &fl, NULL);
Jeff Layton1c7dd2f2014-08-22 10:55:47 -04004111 if (fl)
Jeff Layton417c6622014-07-21 09:34:57 -04004112 locks_free_lock(fl);
Jeff Layton1c7dd2f2014-08-22 10:55:47 -04004113 if (status)
Jeff Layton417c6622014-07-21 09:34:57 -04004114 goto out_fput;
Benny Halevycdc97502014-05-30 09:09:30 -04004115 spin_lock(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04004116 spin_lock(&fp->fi_lock);
4117 /* Did the lease get broken before we took the lock? */
4118 status = -EAGAIN;
4119 if (fp->fi_had_conflict)
4120 goto out_unlock;
4121 /* Race breaker */
Jeff Layton0c637be2014-08-22 12:05:43 -04004122 if (fp->fi_deleg_file) {
Andrew Elble34ed9872015-10-15 12:07:28 -04004123 status = hash_delegation_locked(dp, fp);
Jeff Layton417c6622014-07-21 09:34:57 -04004124 goto out_unlock;
4125 }
Jeff Layton417c6622014-07-21 09:34:57 -04004126 fp->fi_deleg_file = filp;
Andrew Elble34ed9872015-10-15 12:07:28 -04004127 fp->fi_delegees = 0;
4128 status = hash_delegation_locked(dp, fp);
Jeff Layton417c6622014-07-21 09:34:57 -04004129 spin_unlock(&fp->fi_lock);
Benny Halevycdc97502014-05-30 09:09:30 -04004130 spin_unlock(&state_lock);
Andrew Elble34ed9872015-10-15 12:07:28 -04004131 if (status) {
4132 /* Should never happen, this is a new fi_deleg_file */
4133 WARN_ON_ONCE(1);
4134 goto out_fput;
4135 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004136 return 0;
Jeff Layton417c6622014-07-21 09:34:57 -04004137out_unlock:
4138 spin_unlock(&fp->fi_lock);
4139 spin_unlock(&state_lock);
4140out_fput:
4141 fput(filp);
J. Bruce Fieldse8730882012-01-23 13:52:01 -05004142 return status;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004143}
4144
Jeff Layton0b266932014-07-25 07:34:25 -04004145static struct nfs4_delegation *
4146nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
Sachin Bhamare8287f002015-04-27 14:50:14 +02004147 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004148{
Jeff Layton0b266932014-07-25 07:34:25 -04004149 int status;
4150 struct nfs4_delegation *dp;
Jeff Layton417c6622014-07-21 09:34:57 -04004151
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04004152 if (fp->fi_had_conflict)
Jeff Layton0b266932014-07-25 07:34:25 -04004153 return ERR_PTR(-EAGAIN);
4154
Andrew Elble34ed9872015-10-15 12:07:28 -04004155 spin_lock(&state_lock);
4156 spin_lock(&fp->fi_lock);
4157 status = nfs4_get_existing_delegation(clp, fp);
4158 spin_unlock(&fp->fi_lock);
4159 spin_unlock(&state_lock);
4160
4161 if (status)
4162 return ERR_PTR(status);
4163
Sachin Bhamare8287f002015-04-27 14:50:14 +02004164 dp = alloc_init_deleg(clp, fh, odstate);
Jeff Layton0b266932014-07-25 07:34:25 -04004165 if (!dp)
4166 return ERR_PTR(-ENOMEM);
4167
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04004168 get_nfs4_file(fp);
Benny Halevycdc97502014-05-30 09:09:30 -04004169 spin_lock(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04004170 spin_lock(&fp->fi_lock);
Trond Myklebust11b91642014-07-29 21:34:08 -04004171 dp->dl_stid.sc_file = fp;
Jeff Layton0c637be2014-08-22 12:05:43 -04004172 if (!fp->fi_deleg_file) {
Jeff Layton417c6622014-07-21 09:34:57 -04004173 spin_unlock(&fp->fi_lock);
4174 spin_unlock(&state_lock);
Jeff Layton0b266932014-07-25 07:34:25 -04004175 status = nfs4_setlease(dp);
4176 goto out;
Jeff Layton417c6622014-07-21 09:34:57 -04004177 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004178 if (fp->fi_had_conflict) {
Jeff Layton417c6622014-07-21 09:34:57 -04004179 status = -EAGAIN;
4180 goto out_unlock;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004181 }
Andrew Elble34ed9872015-10-15 12:07:28 -04004182 status = hash_delegation_locked(dp, fp);
Jeff Layton417c6622014-07-21 09:34:57 -04004183out_unlock:
4184 spin_unlock(&fp->fi_lock);
Benny Halevycdc97502014-05-30 09:09:30 -04004185 spin_unlock(&state_lock);
Jeff Layton0b266932014-07-25 07:34:25 -04004186out:
4187 if (status) {
Sachin Bhamare8287f002015-04-27 14:50:14 +02004188 put_clnt_odstate(dp->dl_clnt_odstate);
Trond Myklebust60116952014-07-29 21:34:06 -04004189 nfs4_put_stid(&dp->dl_stid);
Jeff Layton0b266932014-07-25 07:34:25 -04004190 return ERR_PTR(status);
4191 }
4192 return dp;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05004193}
4194
Benny Halevy4aa89132012-02-21 14:16:44 -08004195static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
4196{
4197 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4198 if (status == -EAGAIN)
4199 open->op_why_no_deleg = WND4_CONTENTION;
4200 else {
4201 open->op_why_no_deleg = WND4_RESOURCE;
4202 switch (open->op_deleg_want) {
4203 case NFS4_SHARE_WANT_READ_DELEG:
4204 case NFS4_SHARE_WANT_WRITE_DELEG:
4205 case NFS4_SHARE_WANT_ANY_DELEG:
4206 break;
4207 case NFS4_SHARE_WANT_CANCEL:
4208 open->op_why_no_deleg = WND4_CANCELLED;
4209 break;
4210 case NFS4_SHARE_WANT_NO_DELEG:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004211 WARN_ON_ONCE(1);
Benny Halevy4aa89132012-02-21 14:16:44 -08004212 }
4213 }
4214}
4215
Linus Torvalds1da177e2005-04-16 15:20:36 -07004216/*
4217 * Attempt to hand out a delegation.
J. Bruce Fields99c41512013-05-21 16:21:25 -04004218 *
4219 * Note we don't support write delegations, and won't until the vfs has
4220 * proper support for them.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004221 */
4222static void
Jeff Layton4cf59222014-07-25 07:34:24 -04004223nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
4224 struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004225{
4226 struct nfs4_delegation *dp;
Jeff Layton4cf59222014-07-25 07:34:24 -04004227 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
4228 struct nfs4_client *clp = stp->st_stid.sc_client;
J. Bruce Fields14a24e92010-12-10 19:02:49 -05004229 int cb_up;
J. Bruce Fields99c41512013-05-21 16:21:25 -04004230 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004232 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
NeilBrown7b190fe2005-06-23 22:03:23 -07004233 open->op_recall = 0;
4234 switch (open->op_claim_type) {
4235 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05004236 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07004237 open->op_recall = 1;
J. Bruce Fields99c41512013-05-21 16:21:25 -04004238 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
4239 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004240 break;
4241 case NFS4_OPEN_CLAIM_NULL:
Ming Chened47b062014-01-09 21:26:10 +00004242 case NFS4_OPEN_CLAIM_FH:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004243 /*
4244 * Let's not give out any delegations till everyone's
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -04004245 * had the chance to reclaim theirs, *and* until
4246 * NLM locks have all been reclaimed:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004247 */
Jeff Layton4cf59222014-07-25 07:34:24 -04004248 if (locks_in_grace(clp->net))
J. Bruce Fields99c41512013-05-21 16:21:25 -04004249 goto out_no_deleg;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004250 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields99c41512013-05-21 16:21:25 -04004251 goto out_no_deleg;
Steve Dickson9a0590a2013-05-15 14:51:49 -04004252 /*
4253 * Also, if the file was opened for write or
4254 * create, there's a good chance the client's
4255 * about to write to it, resulting in an
4256 * immediate recall (since we don't support
4257 * write delegations):
4258 */
NeilBrown7b190fe2005-06-23 22:03:23 -07004259 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields99c41512013-05-21 16:21:25 -04004260 goto out_no_deleg;
4261 if (open->op_create == NFS4_OPEN_CREATE)
4262 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004263 break;
4264 default:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004265 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004266 }
Sachin Bhamare8287f002015-04-27 14:50:14 +02004267 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
Jeff Layton0b266932014-07-25 07:34:25 -04004268 if (IS_ERR(dp))
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004269 goto out_no_deleg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004271 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004272
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004273 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004274 STATEID_VAL(&dp->dl_stid.sc_stateid));
J. Bruce Fields99c41512013-05-21 16:21:25 -04004275 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
Trond Myklebust67cb1272014-07-29 21:34:17 -04004276 nfs4_put_stid(&dp->dl_stid);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004277 return;
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004278out_no_deleg:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004279 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
4280 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04004281 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
J. Bruce Fields99c41512013-05-21 16:21:25 -04004282 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04004283 open->op_recall = 1;
4284 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04004285
4286 /* 4.1 client asking for a delegation? */
4287 if (open->op_deleg_want)
4288 nfsd4_open_deleg_none_ext(open, status);
4289 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004290}
4291
Benny Halevye27f49c2012-02-21 14:16:54 -08004292static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
4293 struct nfs4_delegation *dp)
4294{
4295 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
4296 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4297 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4298 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
4299 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
4300 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4301 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4302 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
4303 }
4304 /* Otherwise the client must be confused wanting a delegation
4305 * it already has, therefore we don't return
4306 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4307 */
4308}
4309
Al Virob37ad282006-10-19 23:28:59 -07004310__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07004311nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
4312{
Andy Adamson66689582009-04-03 08:28:45 +03004313 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004314 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004315 struct nfs4_file *fp = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004316 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07004317 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004318 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320 /*
4321 * Lookup file; if found, lookup stateid and check open request,
4322 * and check for delegations in the process of being recalled.
4323 * If not found, create the nfs4_file struct
4324 */
Jeff Laytonf9c00c32014-07-23 16:17:41 -04004325 fp = find_or_add_file(open->op_file, &current_fh->fh_handle);
Trond Myklebust950e0112014-06-30 11:48:31 -04004326 if (fp != open->op_file) {
J. Bruce Fields41d22662013-03-21 15:49:47 -04004327 status = nfs4_check_deleg(cl, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07004328 if (status)
4329 goto out;
Andrew Elble7fc05642015-11-05 20:42:43 -05004330 spin_lock(&fp->fi_lock);
Jeff Laytona46cb7f2014-07-10 14:07:35 -04004331 stp = nfsd4_find_existing_open(fp, open);
Andrew Elble7fc05642015-11-05 20:42:43 -05004332 spin_unlock(&fp->fi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333 } else {
Trond Myklebust950e0112014-06-30 11:48:31 -04004334 open->op_file = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07004335 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04004336 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07004337 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338 }
4339
4340 /*
4341 * OPEN the file, or upgrade an existing OPEN.
4342 * If truncate fails, the OPEN fails.
4343 */
4344 if (stp) {
4345 /* Stateid was found, this is an OPEN upgrade */
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04004346 mutex_lock(&stp->st_mutex);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004347 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Jeff Layton35a92fe2015-09-17 07:47:08 -04004348 if (status) {
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04004349 mutex_unlock(&stp->st_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004350 goto out;
Jeff Layton35a92fe2015-09-17 07:47:08 -04004351 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004352 } else {
Oleg Drokin8c7245ab2016-06-14 23:28:06 -04004353 /* stp is returned locked. */
4354 stp = init_open_stateid(fp, open);
4355 /* See if we lost the race to some other thread */
4356 if (stp->st_access_bmap != 0) {
Andrew Elble7fc05642015-11-05 20:42:43 -05004357 status = nfs4_upgrade_open(rqstp, fp, current_fh,
4358 stp, open);
4359 if (status) {
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04004360 mutex_unlock(&stp->st_mutex);
Andrew Elble7fc05642015-11-05 20:42:43 -05004361 goto out;
4362 }
4363 goto upgrade_out;
4364 }
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04004365 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
4366 if (status) {
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04004367 mutex_unlock(&stp->st_mutex);
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04004368 release_open_stateid(stp);
4369 goto out;
4370 }
Sachin Bhamare8287f002015-04-27 14:50:14 +02004371
4372 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
4373 open->op_odstate);
4374 if (stp->st_clnt_odstate == open->op_odstate)
4375 open->op_odstate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376 }
Andrew Elble7fc05642015-11-05 20:42:43 -05004377upgrade_out:
Jeff Layton9767feb2015-10-01 09:05:50 -04004378 nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04004379 mutex_unlock(&stp->st_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004380
Benny Halevyd24433c2012-02-16 20:57:17 +02004381 if (nfsd4_has_session(&resp->cstate)) {
Benny Halevyd24433c2012-02-16 20:57:17 +02004382 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
4383 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4384 open->op_why_no_deleg = WND4_NOT_WANTED;
4385 goto nodeleg;
4386 }
4387 }
4388
Linus Torvalds1da177e2005-04-16 15:20:36 -07004389 /*
4390 * Attempt to hand out a delegation. No error return, because the
4391 * OPEN succeeds even if we fail.
4392 */
Jeff Layton4cf59222014-07-25 07:34:24 -04004393 nfs4_open_delegation(current_fh, open, stp);
Benny Halevyd24433c2012-02-16 20:57:17 +02004394nodeleg:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004395 status = nfs_ok;
4396
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004397 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004398 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004399out:
Benny Halevyd24433c2012-02-16 20:57:17 +02004400 /* 4.1 client trying to upgrade/downgrade delegation? */
4401 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
Benny Halevye27f49c2012-02-21 14:16:54 -08004402 open->op_deleg_want)
4403 nfsd4_deleg_xgrade_none_ext(open, dp);
Benny Halevyd24433c2012-02-16 20:57:17 +02004404
NeilBrown13cd2182005-06-23 22:03:10 -07004405 if (fp)
4406 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07004407 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
Kinglong Mee87186022015-07-13 17:32:59 +08004408 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004409 /*
4410 * To finish the open response, we just need to set the rflags.
4411 */
4412 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004413 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03004414 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004415 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04004416 if (dp)
4417 nfs4_put_stid(&dp->dl_stid);
Trond Myklebustd6f2bc52014-07-29 21:34:19 -04004418 if (stp)
4419 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004420
4421 return status;
4422}
4423
Jeff Layton58fb12e2014-07-29 21:34:27 -04004424void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
Jeff Layton42297892015-03-23 10:53:44 -04004425 struct nfsd4_open *open)
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004426{
4427 if (open->op_openowner) {
Jeff Laytond3134b12014-07-29 21:34:32 -04004428 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004429
Jeff Laytond3134b12014-07-29 21:34:32 -04004430 nfsd4_cstate_assign_replay(cstate, so);
4431 nfs4_put_stateowner(so);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004432 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04004433 if (open->op_file)
Jeff Layton5b095e92014-10-23 08:01:02 -04004434 kmem_cache_free(file_slab, open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04004435 if (open->op_stp)
Trond Myklebust60116952014-07-29 21:34:06 -04004436 nfs4_put_stid(&open->op_stp->st_stid);
Sachin Bhamare8287f002015-04-27 14:50:14 +02004437 if (open->op_odstate)
4438 kmem_cache_free(odstate_slab, open->op_odstate);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004439}
4440
Al Virob37ad282006-10-19 23:28:59 -07004441__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004442nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4443 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004444{
4445 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07004446 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004447 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004448
Linus Torvalds1da177e2005-04-16 15:20:36 -07004449 dprintk("process_renew(%08x/%08x): starting\n",
4450 clid->cl_boot, clid->cl_id);
Jeff Layton4b24ca72014-06-30 11:48:44 -04004451 status = lookup_clientid(clid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004452 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004453 goto out;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004454 clp = cstate->clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004455 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07004456 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04004457 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004458 goto out;
4459 status = nfs_ok;
4460out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004461 return status;
4462}
4463
Jeff Layton7f5ef2e2014-09-12 16:40:21 -04004464void
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03004465nfsd4_end_grace(struct nfsd_net *nn)
NeilBrowna76b4312005-06-23 22:04:01 -07004466{
Jeff Layton33dcc482012-04-10 11:08:48 -04004467 /* do nothing if grace period already ended */
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04004468 if (nn->grace_ended)
Jeff Layton33dcc482012-04-10 11:08:48 -04004469 return;
4470
NeilBrowna76b4312005-06-23 22:04:01 -07004471 dprintk("NFSD: end of grace period\n");
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04004472 nn->grace_ended = true;
J. Bruce Fields70b28232014-09-16 17:37:32 -04004473 /*
4474 * If the server goes down again right now, an NFSv4
4475 * client will still be allowed to reclaim after it comes back up,
4476 * even if it hasn't yet had a chance to reclaim state this time.
4477 *
4478 */
Jeff Layton919b8042014-09-12 16:40:20 -04004479 nfsd4_record_grace_done(nn);
J. Bruce Fields70b28232014-09-16 17:37:32 -04004480 /*
4481 * At this point, NFSv4 clients can still reclaim. But if the
4482 * server crashes, any that have not yet reclaimed will be out
4483 * of luck on the next boot.
4484 *
4485 * (NFSv4.1+ clients are considered to have reclaimed once they
4486 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4487 * have reclaimed after their first OPEN.)
4488 */
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004489 locks_end_grace(&nn->nfsd4_manager);
J. Bruce Fields70b28232014-09-16 17:37:32 -04004490 /*
4491 * At this point, and once lockd and/or any other containers
4492 * exit their grace period, further reclaims will fail and
4493 * regular locking can resume.
4494 */
NeilBrowna76b4312005-06-23 22:04:01 -07004495}
4496
NeilBrownfd39ca92005-06-23 22:04:03 -07004497static time_t
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004498nfs4_laundromat(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004499{
4500 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004501 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004502 struct nfs4_delegation *dp;
Jeff Layton217526e2014-07-30 08:27:11 -04004503 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004504 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03004505 time_t cutoff = get_seconds() - nn->nfsd4_lease;
Jeff Laytona832e7a2014-05-30 09:09:26 -04004506 time_t t, new_timeo = nn->nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004507
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508 dprintk("NFSD: laundromat service - starting\n");
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03004509 nfsd4_end_grace(nn);
Benny Halevy36acb662010-05-12 00:13:04 +03004510 INIT_LIST_HEAD(&reaplist);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03004511 spin_lock(&nn->client_lock);
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03004512 list_for_each_safe(pos, next, &nn->client_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513 clp = list_entry(pos, struct nfs4_client, cl_lru);
4514 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
4515 t = clp->cl_time - cutoff;
Jeff Laytona832e7a2014-05-30 09:09:26 -04004516 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004517 break;
4518 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04004519 if (mark_client_expired_locked(clp)) {
Benny Halevyd7682982010-05-12 00:13:54 +03004520 dprintk("NFSD: client in use (clientid %08x)\n",
4521 clp->cl_clientid.cl_id);
4522 continue;
4523 }
Trond Myklebust4864af92014-07-30 08:27:03 -04004524 list_add(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03004525 }
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03004526 spin_unlock(&nn->client_lock);
Benny Halevy36acb662010-05-12 00:13:04 +03004527 list_for_each_safe(pos, next, &reaplist) {
4528 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004529 dprintk("NFSD: purging unused client (clientid %08x)\n",
4530 clp->cl_clientid.cl_id);
Trond Myklebust4864af92014-07-30 08:27:03 -04004531 list_del_init(&clp->cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532 expire_client(clp);
4533 }
Benny Halevycdc97502014-05-30 09:09:30 -04004534 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04004535 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4537 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04004538 t = dp->dl_time - cutoff;
4539 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540 break;
4541 }
Jeff Layton3fcbbd22015-08-24 12:41:48 -04004542 WARN_ON(!unhash_delegation_locked(dp));
Jeff Layton42690672014-07-25 07:34:20 -04004543 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004544 }
Benny Halevycdc97502014-05-30 09:09:30 -04004545 spin_unlock(&state_lock);
Jeff Layton2d4a5322014-07-25 07:34:21 -04004546 while (!list_empty(&reaplist)) {
4547 dp = list_first_entry(&reaplist, struct nfs4_delegation,
4548 dl_recall_lru);
4549 list_del_init(&dp->dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004550 revoke_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004551 }
Jeff Layton217526e2014-07-30 08:27:11 -04004552
4553 spin_lock(&nn->client_lock);
4554 while (!list_empty(&nn->close_lru)) {
4555 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
4556 oo_close_lru);
4557 if (time_after((unsigned long)oo->oo_time,
4558 (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04004559 t = oo->oo_time - cutoff;
4560 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004561 break;
4562 }
Jeff Layton217526e2014-07-30 08:27:11 -04004563 list_del_init(&oo->oo_close_lru);
4564 stp = oo->oo_last_closed_stid;
4565 oo->oo_last_closed_stid = NULL;
4566 spin_unlock(&nn->client_lock);
4567 nfs4_put_stid(&stp->st_stid);
4568 spin_lock(&nn->client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004569 }
Jeff Layton217526e2014-07-30 08:27:11 -04004570 spin_unlock(&nn->client_lock);
4571
Jeff Laytona832e7a2014-05-30 09:09:26 -04004572 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
Jeff Laytona832e7a2014-05-30 09:09:26 -04004573 return new_timeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004574}
4575
Harvey Harrisona254b242008-02-20 12:49:00 -08004576static struct workqueue_struct *laundry_wq;
4577static void laundromat_main(struct work_struct *);
Harvey Harrisona254b242008-02-20 12:49:00 -08004578
4579static void
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004580laundromat_main(struct work_struct *laundry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004581{
4582 time_t t;
Geliang Tang2e55f3a2016-01-01 22:06:28 +08004583 struct delayed_work *dwork = to_delayed_work(laundry);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004584 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
4585 laundromat_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004586
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004587 t = nfs4_laundromat(nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004588 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004589 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004590}
4591
Jeff Layton8fcd4612015-07-30 06:57:46 -04004592static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07004593{
Jeff Layton8fcd4612015-07-30 06:57:46 -04004594 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004595 return nfserr_bad_stateid;
4596 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597}
4598
Linus Torvalds1da177e2005-04-16 15:20:36 -07004599static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04004600access_permit_read(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601{
Jeff Layton82c5ff12012-05-11 09:45:13 -04004602 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
4603 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
4604 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605}
4606
4607static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04004608access_permit_write(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004609{
Jeff Layton82c5ff12012-05-11 09:45:13 -04004610 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
4611 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004612}
4613
4614static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004615__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004616{
Al Virob37ad282006-10-19 23:28:59 -07004617 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004618
J. Bruce Fields02921912010-07-29 15:16:59 -04004619 /* For lock stateid's, we test the parent open, not the lock: */
4620 if (stp->st_openstp)
4621 stp = stp->st_openstp;
Jeff Layton82c5ff12012-05-11 09:45:13 -04004622 if ((flags & WR_STATE) && !access_permit_write(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623 goto out;
Jeff Layton82c5ff12012-05-11 09:45:13 -04004624 if ((flags & RD_STATE) && !access_permit_read(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625 goto out;
4626 status = nfs_ok;
4627out:
4628 return status;
4629}
4630
Al Virob37ad282006-10-19 23:28:59 -07004631static inline __be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004632check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004633{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004634 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004635 return nfs_ok;
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -04004636 else if (opens_in_grace(net)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03004637 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07004638 * conflicting state; so we must wait out the grace period. */
4639 return nfserr_grace;
4640 } else if (flags & WR_STATE)
4641 return nfs4_share_conflict(current_fh,
4642 NFS4_SHARE_DENY_WRITE);
4643 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4644 return nfs4_share_conflict(current_fh,
4645 NFS4_SHARE_DENY_READ);
4646}
4647
4648/*
4649 * Allow READ/WRITE during grace period on recovered state only for files
4650 * that are not able to provide mandatory locking.
4651 */
4652static inline int
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004653grace_disallows_io(struct net *net, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004654{
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -04004655 return opens_in_grace(net) && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004656}
4657
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004658static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05004659{
Andy Adamson66689582009-04-03 08:28:45 +03004660 /*
4661 * When sessions are used the stateid generation number is ignored
4662 * when it is zero.
4663 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04004664 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04004665 return nfs_ok;
4666
4667 if (in->si_generation == ref->si_generation)
4668 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03004669
J. Bruce Fields0836f582008-01-26 19:08:12 -05004670 /* If the client sends us a stateid from the future, it's buggy: */
Jeff Layton14b7f4a2016-05-05 06:53:47 -04004671 if (nfsd4_stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05004672 return nfserr_bad_stateid;
4673 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04004674 * However, we could see a stateid from the past, even from a
4675 * non-buggy client. For example, if the client sends a lock
4676 * while some IO is outstanding, the lock may bump si_generation
4677 * while the IO is still in flight. The client could avoid that
4678 * situation by waiting for responses on all the IO requests,
4679 * but better performance may result in retrying IO that
4680 * receives an old_stateid error if requests are rarely
4681 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05004682 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04004683 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05004684}
4685
Christoph Hellwigebe9cb32015-04-28 15:41:15 +02004686static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
4687{
4688 if (ols->st_stateowner->so_is_open_owner &&
4689 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4690 return nfserr_bad_stateid;
4691 return nfs_ok;
4692}
4693
Chuck Lever7df302f2012-05-29 13:56:37 -04004694static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04004695{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04004696 struct nfs4_stid *s;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004697 __be32 status = nfserr_bad_stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04004698
Chuck Lever7df302f2012-05-29 13:56:37 -04004699 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
Jeff Layton1af71cc2014-07-29 21:34:14 -04004700 return status;
Chuck Lever7df302f2012-05-29 13:56:37 -04004701 /* Client debugging aid. */
4702 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
4703 char addr_str[INET6_ADDRSTRLEN];
4704 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
4705 sizeof(addr_str));
4706 pr_warn_ratelimited("NFSD: client %s testing state ID "
4707 "with incorrect client ID\n", addr_str);
Jeff Layton1af71cc2014-07-29 21:34:14 -04004708 return status;
Chuck Lever7df302f2012-05-29 13:56:37 -04004709 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004710 spin_lock(&cl->cl_lock);
4711 s = find_stateid_locked(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04004712 if (!s)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004713 goto out_unlock;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04004714 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04004715 if (status)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004716 goto out_unlock;
J. Bruce Fields23340032013-04-09 17:42:28 -04004717 switch (s->sc_type) {
4718 case NFS4_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004719 status = nfs_ok;
4720 break;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004721 case NFS4_REVOKED_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004722 status = nfserr_deleg_revoked;
4723 break;
J. Bruce Fields23340032013-04-09 17:42:28 -04004724 case NFS4_OPEN_STID:
4725 case NFS4_LOCK_STID:
Christoph Hellwigebe9cb32015-04-28 15:41:15 +02004726 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
Jeff Layton1af71cc2014-07-29 21:34:14 -04004727 break;
J. Bruce Fields23340032013-04-09 17:42:28 -04004728 default:
4729 printk("unknown stateid type %x\n", s->sc_type);
Trond Myklebustb0fc29d2014-07-16 10:31:59 -04004730 /* Fallthrough */
J. Bruce Fields23340032013-04-09 17:42:28 -04004731 case NFS4_CLOSED_STID:
Trond Myklebustb0fc29d2014-07-16 10:31:59 -04004732 case NFS4_CLOSED_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004733 status = nfserr_bad_stateid;
J. Bruce Fields23340032013-04-09 17:42:28 -04004734 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004735out_unlock:
4736 spin_unlock(&cl->cl_lock);
4737 return status;
Bryan Schumaker17456802011-07-13 10:50:48 -04004738}
4739
Christoph Hellwigcd61c522014-08-14 08:44:57 +02004740__be32
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004741nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
4742 stateid_t *stateid, unsigned char typemask,
4743 struct nfs4_stid **s, struct nfsd_net *nn)
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004744{
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04004745 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004746
4747 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4748 return nfserr_bad_stateid;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004749 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004750 if (status == nfserr_stale_clientid) {
Jeff Layton4b24ca72014-06-30 11:48:44 -04004751 if (cstate->session)
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004752 return nfserr_bad_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004753 return nfserr_stale_stateid;
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004754 }
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04004755 if (status)
4756 return status;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004757 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004758 if (!*s)
4759 return nfserr_bad_stateid;
4760 return nfs_ok;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004761}
4762
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004763static struct file *
4764nfs4_find_file(struct nfs4_stid *s, int flags)
4765{
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004766 if (!s)
4767 return NULL;
4768
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004769 switch (s->sc_type) {
4770 case NFS4_DELEG_STID:
4771 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
4772 return NULL;
4773 return get_file(s->sc_file->fi_deleg_file);
4774 case NFS4_OPEN_STID:
4775 case NFS4_LOCK_STID:
4776 if (flags & RD_STATE)
4777 return find_readable_file(s->sc_file);
4778 else
4779 return find_writeable_file(s->sc_file);
4780 break;
4781 }
4782
4783 return NULL;
4784}
4785
4786static __be32
4787nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags)
4788{
4789 __be32 status;
4790
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004791 status = nfsd4_check_openowner_confirmed(ols);
4792 if (status)
4793 return status;
4794 return nfs4_check_openmode(ols, flags);
4795}
4796
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004797static __be32
4798nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
4799 struct file **filpp, bool *tmp_file, int flags)
4800{
4801 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
4802 struct file *file;
4803 __be32 status;
4804
4805 file = nfs4_find_file(s, flags);
4806 if (file) {
4807 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
4808 acc | NFSD_MAY_OWNER_OVERRIDE);
4809 if (status) {
4810 fput(file);
4811 return status;
4812 }
4813
4814 *filpp = file;
4815 } else {
4816 status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp);
4817 if (status)
4818 return status;
4819
4820 if (tmp_file)
4821 *tmp_file = true;
4822 }
4823
4824 return 0;
4825}
4826
Linus Torvalds1da177e2005-04-16 15:20:36 -07004827/*
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004828 * Checks for stateid operations
4829 */
Al Virob37ad282006-10-19 23:28:59 -07004830__be32
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004831nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
Anna Schumakeraa0d6ae2015-12-03 12:59:51 +01004832 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
4833 stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004834{
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004835 struct inode *ino = d_inode(fhp->fh_dentry);
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004836 struct net *net = SVC_NET(rqstp);
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004837 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004838 struct nfs4_stid *s = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004839 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004840
Linus Torvalds1da177e2005-04-16 15:20:36 -07004841 if (filpp)
4842 *filpp = NULL;
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004843 if (tmp_file)
4844 *tmp_file = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004845
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004846 if (grace_disallows_io(net, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004847 return nfserr_grace;
4848
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004849 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
4850 status = check_special_stateids(net, fhp, stateid, flags);
4851 goto done;
4852 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004853
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004854 status = nfsd4_lookup_stateid(cstate, stateid,
Jeff Laytondb24b3b2014-06-30 11:48:36 -04004855 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004856 &s, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004857 if (status)
Trond Myklebustc2d1d6a2014-07-30 08:27:25 -04004858 return status;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004859 status = check_stateid_generation(stateid, &s->sc_stateid,
4860 nfsd4_has_session(cstate));
J. Bruce Fields69064a22011-09-09 11:54:57 -04004861 if (status)
4862 goto out;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004863
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004864 switch (s->sc_type) {
4865 case NFS4_DELEG_STID:
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004866 status = nfs4_check_delegmode(delegstateid(s), flags);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004867 break;
4868 case NFS4_OPEN_STID:
4869 case NFS4_LOCK_STID:
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004870 status = nfs4_check_olstateid(fhp, openlockstateid(s), flags);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004871 break;
4872 default:
Trond Myklebust14bcab12014-04-18 14:44:07 -04004873 status = nfserr_bad_stateid;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004874 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004875 }
Jeff Layton8fcd4612015-07-30 06:57:46 -04004876 if (status)
4877 goto out;
4878 status = nfs4_check_fh(fhp, s);
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004879
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004880done:
4881 if (!status && filpp)
4882 status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004883out:
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004884 if (s)
4885 nfs4_put_stid(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004886 return status;
4887}
4888
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004889/*
Bryan Schumaker17456802011-07-13 10:50:48 -04004890 * Test if the stateid is valid
4891 */
4892__be32
4893nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4894 struct nfsd4_test_stateid *test_stateid)
4895{
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004896 struct nfsd4_test_stateid_id *stateid;
4897 struct nfs4_client *cl = cstate->session->se_client;
4898
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004899 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
Chuck Lever7df302f2012-05-29 13:56:37 -04004900 stateid->ts_id_status =
4901 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004902
Bryan Schumaker17456802011-07-13 10:50:48 -04004903 return nfs_ok;
4904}
4905
Chuck Lever42691392016-08-11 10:37:30 -04004906static __be32
4907nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
4908{
4909 struct nfs4_ol_stateid *stp = openlockstateid(s);
4910 __be32 ret;
4911
4912 mutex_lock(&stp->st_mutex);
4913
4914 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4915 if (ret)
4916 goto out;
4917
4918 ret = nfserr_locks_held;
4919 if (check_for_locks(stp->st_stid.sc_file,
4920 lockowner(stp->st_stateowner)))
4921 goto out;
4922
4923 release_lock_stateid(stp);
4924 ret = nfs_ok;
4925
4926out:
4927 mutex_unlock(&stp->st_mutex);
4928 nfs4_put_stid(s);
4929 return ret;
4930}
4931
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004932__be32
4933nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4934 struct nfsd4_free_stateid *free_stateid)
4935{
4936 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004937 struct nfs4_stid *s;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004938 struct nfs4_delegation *dp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004939 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004940 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004941
Jeff Layton1af71cc2014-07-29 21:34:14 -04004942 spin_lock(&cl->cl_lock);
4943 s = find_stateid_locked(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004944 if (!s)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004945 goto out_unlock;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004946 switch (s->sc_type) {
4947 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004948 ret = nfserr_locks_held;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004949 break;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004950 case NFS4_OPEN_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004951 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4952 if (ret)
4953 break;
4954 ret = nfserr_locks_held;
4955 break;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004956 case NFS4_LOCK_STID:
Chuck Lever42691392016-08-11 10:37:30 -04004957 atomic_inc(&s->sc_count);
Jeff Layton1af71cc2014-07-29 21:34:14 -04004958 spin_unlock(&cl->cl_lock);
Chuck Lever42691392016-08-11 10:37:30 -04004959 ret = nfsd4_free_lock_stateid(stateid, s);
Jeff Layton1af71cc2014-07-29 21:34:14 -04004960 goto out;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004961 case NFS4_REVOKED_DELEG_STID:
4962 dp = delegstateid(s);
Jeff Layton2d4a5322014-07-25 07:34:21 -04004963 list_del_init(&dp->dl_recall_lru);
4964 spin_unlock(&cl->cl_lock);
Trond Myklebust60116952014-07-29 21:34:06 -04004965 nfs4_put_stid(s);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004966 ret = nfs_ok;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004967 goto out;
4968 /* Default falls through and returns nfserr_bad_stateid */
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004969 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004970out_unlock:
4971 spin_unlock(&cl->cl_lock);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004972out:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004973 return ret;
4974}
4975
NeilBrown4c4cd222005-07-07 17:59:27 -07004976static inline int
4977setlkflg (int type)
4978{
4979 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
4980 RD_STATE : WR_STATE;
4981}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004982
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004983static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004984{
4985 struct svc_fh *current_fh = &cstate->current_fh;
4986 struct nfs4_stateowner *sop = stp->st_stateowner;
4987 __be32 status;
4988
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004989 status = nfsd4_check_seqid(cstate, sop, seqid);
4990 if (status)
4991 return status;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004992 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
4993 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004994 /*
4995 * "Closed" stateid's exist *only* to return
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004996 * nfserr_replay_me from the previous step, and
4997 * revoked delegations are kept only for free_stateid.
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004998 */
4999 return nfserr_bad_stateid;
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005000 mutex_lock(&stp->st_mutex);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005001 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
Jeff Layton35a92fe2015-09-17 07:47:08 -04005002 if (status == nfs_ok)
5003 status = nfs4_check_fh(current_fh, &stp->st_stid);
5004 if (status != nfs_ok)
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005005 mutex_unlock(&stp->st_mutex);
Jeff Layton35a92fe2015-09-17 07:47:08 -04005006 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005007}
5008
Linus Torvalds1da177e2005-04-16 15:20:36 -07005009/*
5010 * Checks for sequence id mutating operations.
5011 */
Al Virob37ad282006-10-19 23:28:59 -07005012static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03005013nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04005014 stateid_t *stateid, char typemask,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005015 struct nfs4_ol_stateid **stpp,
5016 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005017{
J. Bruce Fields0836f582008-01-26 19:08:12 -05005018 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005019 struct nfs4_stid *s;
Trond Myklebuste17f99b2014-06-30 11:48:34 -04005020 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005021
Benny Halevy8c10cbd2009-10-19 12:04:53 +02005022 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
5023 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07005024
Linus Torvalds1da177e2005-04-16 15:20:36 -07005025 *stpp = NULL;
Trond Myklebust2dd6e452014-06-30 11:48:43 -04005026 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005027 if (status)
5028 return status;
Trond Myklebuste17f99b2014-06-30 11:48:34 -04005029 stp = openlockstateid(s);
Jeff Layton58fb12e2014-07-29 21:34:27 -04005030 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005031
Trond Myklebuste17f99b2014-06-30 11:48:34 -04005032 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
Trond Myklebustfd911012014-07-29 21:34:24 -04005033 if (!status)
Trond Myklebuste17f99b2014-06-30 11:48:34 -04005034 *stpp = stp;
Trond Myklebustfd911012014-07-29 21:34:24 -04005035 else
5036 nfs4_put_stid(&stp->st_stid);
Trond Myklebuste17f99b2014-06-30 11:48:34 -04005037 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005038}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05005039
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005040static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5041 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005042{
5043 __be32 status;
5044 struct nfs4_openowner *oo;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04005045 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005046
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005047 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04005048 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04005049 if (status)
5050 return status;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04005051 oo = openowner(stp->st_stateowner);
5052 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005053 mutex_unlock(&stp->st_mutex);
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04005054 nfs4_put_stid(&stp->st_stid);
NeilBrown3a4f98b2005-07-07 17:59:26 -07005055 return nfserr_bad_stateid;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04005056 }
5057 *stpp = stp;
NeilBrown3a4f98b2005-07-07 17:59:26 -07005058 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005059}
5060
Al Virob37ad282006-10-19 23:28:59 -07005061__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005062nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005063 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005064{
Al Virob37ad282006-10-19 23:28:59 -07005065 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005066 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005067 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005068 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005069
Al Viroa6a9f182013-09-16 10:57:01 -04005070 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5071 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005072
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005073 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07005074 if (status)
5075 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005076
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005077 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005078 oc->oc_seqid, &oc->oc_req_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005079 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005080 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04005081 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005082 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04005083 status = nfserr_bad_stateid;
Jeff Layton35a92fe2015-09-17 07:47:08 -04005084 if (oo->oo_flags & NFS4_OO_CONFIRMED) {
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005085 mutex_unlock(&stp->st_mutex);
Trond Myklebust2585fc72014-07-29 21:34:21 -04005086 goto put_stateid;
Jeff Layton35a92fe2015-09-17 07:47:08 -04005087 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04005088 oo->oo_flags |= NFS4_OO_CONFIRMED;
Jeff Layton9767feb2015-10-01 09:05:50 -04005089 nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005090 mutex_unlock(&stp->st_mutex);
Benny Halevy8c10cbd2009-10-19 12:04:53 +02005091 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005092 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07005093
Jeff Layton2a4317c2012-03-21 16:42:43 -04005094 nfsd4_client_record_create(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04005095 status = nfs_ok;
Trond Myklebust2585fc72014-07-29 21:34:21 -04005096put_stateid:
5097 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005098out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005099 nfsd4_bump_seqid(cstate, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005100 return status;
5101}
5102
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04005103static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005104{
Jeff Layton82c5ff12012-05-11 09:45:13 -04005105 if (!test_access(access, stp))
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04005106 return;
Trond Myklebust11b91642014-07-29 21:34:08 -04005107 nfs4_file_put_access(stp->st_stid.sc_file, access);
Jeff Layton82c5ff12012-05-11 09:45:13 -04005108 clear_access(access, stp);
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04005109}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04005110
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04005111static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
5112{
5113 switch (to_access) {
5114 case NFS4_SHARE_ACCESS_READ:
5115 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
5116 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5117 break;
5118 case NFS4_SHARE_ACCESS_WRITE:
5119 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
5120 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5121 break;
5122 case NFS4_SHARE_ACCESS_BOTH:
5123 break;
5124 default:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05005125 WARN_ON_ONCE(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005126 }
5127}
5128
Al Virob37ad282006-10-19 23:28:59 -07005129__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005130nfsd4_open_downgrade(struct svc_rqst *rqstp,
5131 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005132 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005133{
Al Virob37ad282006-10-19 23:28:59 -07005134 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005135 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005136 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005137
Al Viroa6a9f182013-09-16 10:57:01 -04005138 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5139 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005140
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04005141 /* We don't yet support WANT bits: */
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02005142 if (od->od_deleg_want)
5143 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
5144 od->od_deleg_want);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005145
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005146 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005147 &od->od_stateid, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005148 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005149 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005150 status = nfserr_inval;
Jeff Layton82c5ff12012-05-11 09:45:13 -04005151 if (!test_access(od->od_share_access, stp)) {
Jeff Laytonc11c5912014-07-10 14:07:30 -04005152 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07005153 stp->st_access_bmap, od->od_share_access);
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005154 goto put_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005155 }
Jeff Laytonce0fc432012-05-11 09:45:14 -04005156 if (!test_deny(od->od_share_deny, stp)) {
Jeff Laytonc11c5912014-07-10 14:07:30 -04005157 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07005158 stp->st_deny_bmap, od->od_share_deny);
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005159 goto put_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005160 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04005161 nfs4_stateid_downgrade(stp, od->od_share_access);
Jeff Laytonce0fc432012-05-11 09:45:14 -04005162 reset_union_bmap_deny(od->od_share_deny, stp);
Jeff Layton9767feb2015-10-01 09:05:50 -04005163 nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005164 status = nfs_ok;
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005165put_stateid:
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005166 mutex_unlock(&stp->st_mutex);
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005167 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005168out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005169 nfsd4_bump_seqid(cstate, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005170 return status;
5171}
5172
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005173static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
5174{
Trond Myklebustacf92952014-06-30 11:48:37 -04005175 struct nfs4_client *clp = s->st_stid.sc_client;
Jeff Laytone8568732015-08-24 12:41:47 -04005176 bool unhashed;
Jeff Laytond83017f2014-07-29 21:34:42 -04005177 LIST_HEAD(reaplist);
Trond Myklebustacf92952014-06-30 11:48:37 -04005178
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005179 s->st_stid.sc_type = NFS4_CLOSED_STID;
Jeff Layton2c41beb2014-07-29 21:34:41 -04005180 spin_lock(&clp->cl_lock);
Jeff Laytone8568732015-08-24 12:41:47 -04005181 unhashed = unhash_open_stateid(s, &reaplist);
Trond Myklebustacf92952014-06-30 11:48:37 -04005182
Jeff Laytond83017f2014-07-29 21:34:42 -04005183 if (clp->cl_minorversion) {
Jeff Laytone8568732015-08-24 12:41:47 -04005184 if (unhashed)
5185 put_ol_stateid_locked(s, &reaplist);
Jeff Laytond83017f2014-07-29 21:34:42 -04005186 spin_unlock(&clp->cl_lock);
5187 free_ol_stateid_reaplist(&reaplist);
5188 } else {
5189 spin_unlock(&clp->cl_lock);
5190 free_ol_stateid_reaplist(&reaplist);
Jeff Laytone8568732015-08-24 12:41:47 -04005191 if (unhashed)
5192 move_to_close_lru(s, clp->net);
Jeff Laytond83017f2014-07-29 21:34:42 -04005193 }
J. Bruce Fields38c387b2011-09-16 17:42:48 -04005194}
5195
Linus Torvalds1da177e2005-04-16 15:20:36 -07005196/*
5197 * nfs4_unlock_state() called after encode
5198 */
Al Virob37ad282006-10-19 23:28:59 -07005199__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005200nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005201 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005202{
Al Virob37ad282006-10-19 23:28:59 -07005203 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005204 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005205 struct net *net = SVC_NET(rqstp);
5206 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005207
Al Viroa6a9f182013-09-16 10:57:01 -04005208 dprintk("NFSD: nfsd4_close on file %pd\n",
5209 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005210
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005211 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
5212 &close->cl_stateid,
5213 NFS4_OPEN_STID|NFS4_CLOSED_STID,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005214 &stp, nn);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005215 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005216 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005217 goto out;
Jeff Layton9767feb2015-10-01 09:05:50 -04005218 nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005219 mutex_unlock(&stp->st_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005220
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005221 nfsd4_close_open_stateid(stp);
Trond Myklebust8a0b5892014-07-29 21:34:20 -04005222
5223 /* put reference from nfs4_preprocess_seqid_op */
5224 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005225out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005226 return status;
5227}
5228
Al Virob37ad282006-10-19 23:28:59 -07005229__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005230nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5231 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005232{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005233 struct nfs4_delegation *dp;
5234 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005235 struct nfs4_stid *s;
Al Virob37ad282006-10-19 23:28:59 -07005236 __be32 status;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005237 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005238
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005239 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005240 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005241
Trond Myklebust2dd6e452014-06-30 11:48:43 -04005242 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005243 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005244 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005245 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04005246 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005247 if (status)
Trond Myklebustfd911012014-07-29 21:34:24 -04005248 goto put_stateid;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005249
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04005250 destroy_delegation(dp);
Trond Myklebustfd911012014-07-29 21:34:24 -04005251put_stateid:
5252 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005253out:
5254 return status;
5255}
5256
Benny Halevy87df4de2008-12-15 19:42:03 +02005257static inline u64
5258end_offset(u64 start, u64 len)
5259{
5260 u64 end;
5261
5262 end = start + len;
5263 return end >= start ? end: NFS4_MAX_UINT64;
5264}
5265
5266/* last octet in a range */
5267static inline u64
5268last_byte_offset(u64 start, u64 len)
5269{
5270 u64 end;
5271
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05005272 WARN_ON_ONCE(!len);
Benny Halevy87df4de2008-12-15 19:42:03 +02005273 end = start + len;
5274 return end > start ? end - 1: NFS4_MAX_UINT64;
5275}
5276
Linus Torvalds1da177e2005-04-16 15:20:36 -07005277/*
5278 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5279 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5280 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5281 * locking, this prevents us from being completely protocol-compliant. The
5282 * real solution to this problem is to start using unsigned file offsets in
5283 * the VFS, but this is a very deep change!
5284 */
5285static inline void
5286nfs4_transform_lock_offset(struct file_lock *lock)
5287{
5288 if (lock->fl_start < 0)
5289 lock->fl_start = OFFSET_MAX;
5290 if (lock->fl_end < 0)
5291 lock->fl_end = OFFSET_MAX;
5292}
5293
Jeff Laytoncae80b32015-04-03 09:04:04 -04005294static fl_owner_t
5295nfsd4_fl_get_owner(fl_owner_t owner)
Kinglong Meeaef95832014-08-22 10:18:44 -04005296{
Jeff Laytoncae80b32015-04-03 09:04:04 -04005297 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5298
5299 nfs4_get_stateowner(&lo->lo_owner);
5300 return owner;
Kinglong Meeaef95832014-08-22 10:18:44 -04005301}
5302
Jeff Laytoncae80b32015-04-03 09:04:04 -04005303static void
5304nfsd4_fl_put_owner(fl_owner_t owner)
Kinglong Meeaef95832014-08-22 10:18:44 -04005305{
Jeff Laytoncae80b32015-04-03 09:04:04 -04005306 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
Kinglong Meeaef95832014-08-22 10:18:44 -04005307
Jeff Laytoncae80b32015-04-03 09:04:04 -04005308 if (lo)
Kinglong Meeaef95832014-08-22 10:18:44 -04005309 nfs4_put_stateowner(&lo->lo_owner);
Kinglong Meeaef95832014-08-22 10:18:44 -04005310}
5311
Alexey Dobriyan7b021962009-09-21 17:01:12 -07005312static const struct lock_manager_operations nfsd_posix_mng_ops = {
Kinglong Meeaef95832014-08-22 10:18:44 -04005313 .lm_get_owner = nfsd4_fl_get_owner,
5314 .lm_put_owner = nfsd4_fl_put_owner,
NeilBrownd5b90262006-04-10 22:55:22 -07005315};
Linus Torvalds1da177e2005-04-16 15:20:36 -07005316
5317static inline void
5318nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
5319{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005320 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005321
NeilBrownd5b90262006-04-10 22:55:22 -07005322 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005323 lo = (struct nfs4_lockowner *) fl->fl_owner;
5324 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
5325 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04005326 if (!deny->ld_owner.data)
5327 /* We just don't care that much */
5328 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005329 deny->ld_owner.len = lo->lo_owner.so_owner.len;
5330 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07005331 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04005332nevermind:
5333 deny->ld_owner.len = 0;
5334 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07005335 deny->ld_clientid.cl_boot = 0;
5336 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005337 }
5338 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02005339 deny->ld_length = NFS4_MAX_UINT64;
5340 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005341 deny->ld_length = fl->fl_end - fl->fl_start + 1;
5342 deny->ld_type = NFS4_READ_LT;
5343 if (fl->fl_type != F_RDLCK)
5344 deny->ld_type = NFS4_WRITE_LT;
5345}
5346
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005347static struct nfs4_lockowner *
Kinglong Meec8623992015-07-13 17:35:37 +08005348find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005349{
Trond Myklebustd4f04892014-07-29 21:34:36 -04005350 unsigned int strhashval = ownerstr_hashval(owner);
Trond Myklebustb3c32bc2014-06-30 11:48:40 -04005351 struct nfs4_stateowner *so;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005352
Trond Myklebust0a880a22014-07-30 08:27:10 -04005353 lockdep_assert_held(&clp->cl_lock);
5354
Trond Myklebustd4f04892014-07-29 21:34:36 -04005355 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
5356 so_strhash) {
Trond Myklebustb3c32bc2014-06-30 11:48:40 -04005357 if (so->so_is_open_owner)
5358 continue;
Kinglong Meeb5971af2014-08-22 10:18:43 -04005359 if (same_owner_str(so, owner))
5360 return lockowner(nfs4_get_stateowner(so));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005361 }
5362 return NULL;
5363}
5364
Trond Myklebustc58c6612014-07-29 21:34:35 -04005365static struct nfs4_lockowner *
Kinglong Meec8623992015-07-13 17:35:37 +08005366find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner)
Trond Myklebustc58c6612014-07-29 21:34:35 -04005367{
5368 struct nfs4_lockowner *lo;
5369
Trond Myklebustd4f04892014-07-29 21:34:36 -04005370 spin_lock(&clp->cl_lock);
Kinglong Meec8623992015-07-13 17:35:37 +08005371 lo = find_lockowner_str_locked(clp, owner);
Trond Myklebustd4f04892014-07-29 21:34:36 -04005372 spin_unlock(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005373 return lo;
5374}
5375
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005376static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
5377{
Trond Myklebustc58c6612014-07-29 21:34:35 -04005378 unhash_lockowner_locked(lockowner(sop));
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005379}
5380
Jeff Layton6b180f02014-07-29 21:34:26 -04005381static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
5382{
5383 struct nfs4_lockowner *lo = lockowner(sop);
5384
5385 kmem_cache_free(lockowner_slab, lo);
5386}
5387
5388static const struct nfs4_stateowner_operations lockowner_ops = {
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005389 .so_unhash = nfs4_unhash_lockowner,
5390 .so_free = nfs4_free_lockowner,
Jeff Layton6b180f02014-07-29 21:34:26 -04005391};
5392
Linus Torvalds1da177e2005-04-16 15:20:36 -07005393/*
5394 * Alloc a lock owner structure.
5395 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03005396 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005397 *
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05005398 * strhashval = ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07005399 */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005400static struct nfs4_lockowner *
Trond Myklebustc58c6612014-07-29 21:34:35 -04005401alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
5402 struct nfs4_ol_stateid *open_stp,
5403 struct nfsd4_lock *lock)
5404{
Trond Myklebustc58c6612014-07-29 21:34:35 -04005405 struct nfs4_lockowner *lo, *ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005406
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005407 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
5408 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005409 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005410 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
5411 lo->lo_owner.so_is_open_owner = 0;
Jeff Layton5db1c032014-07-29 21:34:28 -04005412 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
Jeff Layton6b180f02014-07-29 21:34:26 -04005413 lo->lo_owner.so_ops = &lockowner_ops;
Trond Myklebustd4f04892014-07-29 21:34:36 -04005414 spin_lock(&clp->cl_lock);
Kinglong Meec8623992015-07-13 17:35:37 +08005415 ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005416 if (ret == NULL) {
5417 list_add(&lo->lo_owner.so_strhash,
Trond Myklebustd4f04892014-07-29 21:34:36 -04005418 &clp->cl_ownerstr_hashtbl[strhashval]);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005419 ret = lo;
5420 } else
Kinglong Meed50ffde2015-07-16 12:05:07 +08005421 nfs4_free_stateowner(&lo->lo_owner);
5422
Trond Myklebustd4f04892014-07-29 21:34:36 -04005423 spin_unlock(&clp->cl_lock);
J. Bruce Fields340f0ba2015-03-23 11:02:30 -04005424 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005425}
5426
Jeff Layton356a95e2014-07-29 21:34:13 -04005427static void
5428init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
5429 struct nfs4_file *fp, struct inode *inode,
5430 struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005431{
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04005432 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005433
Jeff Layton356a95e2014-07-29 21:34:13 -04005434 lockdep_assert_held(&clp->cl_lock);
5435
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005436 atomic_inc(&stp->st_stid.sc_count);
J. Bruce Fields3abdb602013-02-03 12:23:01 -05005437 stp->st_stid.sc_type = NFS4_LOCK_STID;
Kinglong Meeb5971af2014-08-22 10:18:43 -04005438 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
NeilBrown13cd2182005-06-23 22:03:10 -07005439 get_nfs4_file(fp);
Trond Myklebust11b91642014-07-29 21:34:08 -04005440 stp->st_stid.sc_file = fp;
Jeff Laytonb49e0842014-07-29 21:34:11 -04005441 stp->st_stid.sc_free = nfs4_free_lock_stateid;
J. Bruce Fields0997b172011-03-02 18:01:35 -05005442 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005443 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07005444 stp->st_openstp = open_stp;
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005445 mutex_init(&stp->st_mutex);
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04005446 list_add(&stp->st_locks, &open_stp->st_locks);
Jeff Layton1c755dc2014-07-29 21:34:12 -04005447 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
Trond Myklebust1d31a252014-07-10 14:07:25 -04005448 spin_lock(&fp->fi_lock);
5449 list_add(&stp->st_perfile, &fp->fi_stateids);
5450 spin_unlock(&fp->fi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005451}
5452
Jeff Laytonc53530d2014-06-30 11:48:39 -04005453static struct nfs4_ol_stateid *
5454find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
5455{
5456 struct nfs4_ol_stateid *lst;
Jeff Layton356a95e2014-07-29 21:34:13 -04005457 struct nfs4_client *clp = lo->lo_owner.so_client;
5458
5459 lockdep_assert_held(&clp->cl_lock);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005460
5461 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005462 if (lst->st_stid.sc_file == fp) {
5463 atomic_inc(&lst->st_stid.sc_count);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005464 return lst;
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005465 }
Jeff Laytonc53530d2014-06-30 11:48:39 -04005466 }
5467 return NULL;
5468}
5469
Jeff Layton356a95e2014-07-29 21:34:13 -04005470static struct nfs4_ol_stateid *
5471find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
5472 struct inode *inode, struct nfs4_ol_stateid *ost,
5473 bool *new)
5474{
5475 struct nfs4_stid *ns = NULL;
5476 struct nfs4_ol_stateid *lst;
5477 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5478 struct nfs4_client *clp = oo->oo_owner.so_client;
5479
5480 spin_lock(&clp->cl_lock);
5481 lst = find_lock_stateid(lo, fi);
5482 if (lst == NULL) {
5483 spin_unlock(&clp->cl_lock);
5484 ns = nfs4_alloc_stid(clp, stateid_slab);
5485 if (ns == NULL)
5486 return NULL;
5487
5488 spin_lock(&clp->cl_lock);
5489 lst = find_lock_stateid(lo, fi);
5490 if (likely(!lst)) {
5491 lst = openlockstateid(ns);
5492 init_lock_stateid(lst, lo, fi, inode, ost);
5493 ns = NULL;
5494 *new = true;
5495 }
5496 }
5497 spin_unlock(&clp->cl_lock);
5498 if (ns)
5499 nfs4_put_stid(ns);
5500 return lst;
5501}
Jeff Laytonc53530d2014-06-30 11:48:39 -04005502
NeilBrownfd39ca92005-06-23 22:04:03 -07005503static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07005504check_lock_length(u64 offset, u64 length)
5505{
Kinglong Meee7969312015-07-13 17:34:19 +08005506 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
5507 (length > ~offset)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005508}
5509
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005510static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05005511{
Trond Myklebust11b91642014-07-29 21:34:08 -04005512 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
J. Bruce Fields0997b172011-03-02 18:01:35 -05005513
Jeff Layton7214e862014-07-10 14:07:33 -04005514 lockdep_assert_held(&fp->fi_lock);
5515
Jeff Layton82c5ff12012-05-11 09:45:13 -04005516 if (test_access(access, lock_stp))
J. Bruce Fields0997b172011-03-02 18:01:35 -05005517 return;
Jeff Layton12659652014-07-10 14:07:28 -04005518 __nfs4_file_get_access(fp, access);
Jeff Layton82c5ff12012-05-11 09:45:13 -04005519 set_access(access, lock_stp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005520}
5521
Jeff Layton356a95e2014-07-29 21:34:13 -04005522static __be32
5523lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
5524 struct nfs4_ol_stateid *ost,
5525 struct nfsd4_lock *lock,
Jeff Laytondd257932016-08-11 10:37:39 -04005526 struct nfs4_ol_stateid **plst, bool *new)
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005527{
Jeff Layton5db1c032014-07-29 21:34:28 -04005528 __be32 status;
Trond Myklebust11b91642014-07-29 21:34:08 -04005529 struct nfs4_file *fi = ost->st_stid.sc_file;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005530 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5531 struct nfs4_client *cl = oo->oo_owner.so_client;
David Howells2b0143b2015-03-17 22:25:59 +00005532 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005533 struct nfs4_lockowner *lo;
Jeff Laytondd257932016-08-11 10:37:39 -04005534 struct nfs4_ol_stateid *lst;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005535 unsigned int strhashval;
Jeff Laytondd257932016-08-11 10:37:39 -04005536 bool hashed;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005537
Kinglong Meec8623992015-07-13 17:35:37 +08005538 lo = find_lockowner_str(cl, &lock->lk_new_owner);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005539 if (!lo) {
Kinglong Mee76f6c9e2015-07-13 17:35:10 +08005540 strhashval = ownerstr_hashval(&lock->lk_new_owner);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005541 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
5542 if (lo == NULL)
5543 return nfserr_jukebox;
5544 } else {
5545 /* with an existing lockowner, seqids must be the same */
Jeff Layton5db1c032014-07-29 21:34:28 -04005546 status = nfserr_bad_seqid;
Jeff Laytonc53530d2014-06-30 11:48:39 -04005547 if (!cstate->minorversion &&
5548 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
Jeff Layton5db1c032014-07-29 21:34:28 -04005549 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005550 }
Jeff Laytonc53530d2014-06-30 11:48:39 -04005551
Jeff Laytondd257932016-08-11 10:37:39 -04005552retry:
5553 lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
5554 if (lst == NULL) {
Jeff Layton5db1c032014-07-29 21:34:28 -04005555 status = nfserr_jukebox;
5556 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005557 }
Jeff Laytondd257932016-08-11 10:37:39 -04005558
5559 mutex_lock(&lst->st_mutex);
5560
5561 /* See if it's still hashed to avoid race with FREE_STATEID */
5562 spin_lock(&cl->cl_lock);
5563 hashed = !list_empty(&lst->st_perfile);
5564 spin_unlock(&cl->cl_lock);
5565
5566 if (!hashed) {
5567 mutex_unlock(&lst->st_mutex);
5568 nfs4_put_stid(&lst->st_stid);
5569 goto retry;
5570 }
Jeff Layton5db1c032014-07-29 21:34:28 -04005571 status = nfs_ok;
Jeff Laytondd257932016-08-11 10:37:39 -04005572 *plst = lst;
Jeff Layton5db1c032014-07-29 21:34:28 -04005573out:
5574 nfs4_put_stateowner(&lo->lo_owner);
5575 return status;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005576}
5577
Linus Torvalds1da177e2005-04-16 15:20:36 -07005578/*
5579 * LOCK operation
5580 */
Al Virob37ad282006-10-19 23:28:59 -07005581__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005582nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005583 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005584{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005585 struct nfs4_openowner *open_sop = NULL;
5586 struct nfs4_lockowner *lock_sop = NULL;
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005587 struct nfs4_ol_stateid *lock_stp = NULL;
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005588 struct nfs4_ol_stateid *open_stp = NULL;
Jeff Layton7214e862014-07-10 14:07:33 -04005589 struct nfs4_file *fp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04005590 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04005591 struct file_lock *file_lock = NULL;
5592 struct file_lock *conflock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005593 __be32 status = 0;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005594 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07005595 int err;
Jeff Layton5db1c032014-07-29 21:34:28 -04005596 bool new = false;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005597 struct net *net = SVC_NET(rqstp);
5598 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005599
5600 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5601 (long long) lock->lk_offset,
5602 (long long) lock->lk_length);
5603
Linus Torvalds1da177e2005-04-16 15:20:36 -07005604 if (check_lock_length(lock->lk_offset, lock->lk_length))
5605 return nfserr_inval;
5606
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005607 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02005608 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08005609 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5610 return status;
5611 }
5612
Linus Torvalds1da177e2005-04-16 15:20:36 -07005613 if (lock->lk_is_new) {
J. Bruce Fields684e5632011-11-04 17:08:10 -04005614 if (nfsd4_has_session(cstate))
5615 /* See rfc 5661 18.10.3: given clientid is ignored: */
Kinglong Mee76f6c9e2015-07-13 17:35:10 +08005616 memcpy(&lock->lk_new_clientid,
J. Bruce Fields684e5632011-11-04 17:08:10 -04005617 &cstate->session->se_client->cl_clientid,
5618 sizeof(clientid_t));
5619
Linus Torvalds1da177e2005-04-16 15:20:36 -07005620 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04005621 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005622 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005623
Linus Torvalds1da177e2005-04-16 15:20:36 -07005624 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005625 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005626 lock->lk_new_open_seqid,
5627 &lock->lk_new_open_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005628 &open_stp, nn);
NeilBrown37515172005-07-07 17:59:16 -07005629 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005630 goto out;
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005631 mutex_unlock(&open_stp->st_mutex);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005632 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005633 status = nfserr_bad_stateid;
J. Bruce Fields684e5632011-11-04 17:08:10 -04005634 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
Kinglong Mee76f6c9e2015-07-13 17:35:10 +08005635 &lock->lk_new_clientid))
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005636 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005637 status = lookup_or_create_lock_state(cstate, open_stp, lock,
Jeff Layton5db1c032014-07-29 21:34:28 -04005638 &lock_stp, &new);
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005639 } else {
Benny Halevydd453df2009-04-03 08:28:41 +03005640 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005641 lock->lk_old_lock_seqid,
5642 &lock->lk_old_lock_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005643 NFS4_LOCK_STID, &lock_stp, nn);
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005644 }
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04005645 if (status)
5646 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005647 lock_sop = lockowner(lock_stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005648
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005649 lkflg = setlkflg(lock->lk_type);
5650 status = nfs4_check_openmode(lock_stp, lkflg);
5651 if (status)
5652 goto out;
5653
NeilBrown0dd395d2005-07-07 17:59:15 -07005654 status = nfserr_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005655 if (locks_in_grace(net) && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07005656 goto out;
5657 status = nfserr_no_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005658 if (!locks_in_grace(net) && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07005659 goto out;
5660
Jeff Layton21179d82012-08-21 08:03:32 -04005661 file_lock = locks_alloc_lock();
5662 if (!file_lock) {
5663 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5664 status = nfserr_jukebox;
5665 goto out;
5666 }
5667
Trond Myklebust11b91642014-07-29 21:34:08 -04005668 fp = lock_stp->st_stid.sc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005669 switch (lock->lk_type) {
5670 case NFS4_READ_LT:
5671 case NFS4_READW_LT:
Jeff Layton7214e862014-07-10 14:07:33 -04005672 spin_lock(&fp->fi_lock);
5673 filp = find_readable_file_locked(fp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005674 if (filp)
5675 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Jeff Layton7214e862014-07-10 14:07:33 -04005676 spin_unlock(&fp->fi_lock);
Jeff Layton21179d82012-08-21 08:03:32 -04005677 file_lock->fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05005678 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005679 case NFS4_WRITE_LT:
5680 case NFS4_WRITEW_LT:
Jeff Layton7214e862014-07-10 14:07:33 -04005681 spin_lock(&fp->fi_lock);
5682 filp = find_writeable_file_locked(fp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005683 if (filp)
5684 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Jeff Layton7214e862014-07-10 14:07:33 -04005685 spin_unlock(&fp->fi_lock);
Jeff Layton21179d82012-08-21 08:03:32 -04005686 file_lock->fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05005687 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005688 default:
5689 status = nfserr_inval;
5690 goto out;
5691 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005692 if (!filp) {
5693 status = nfserr_openmode;
5694 goto out;
5695 }
Kinglong Meeaef95832014-08-22 10:18:44 -04005696
5697 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
Jeff Layton21179d82012-08-21 08:03:32 -04005698 file_lock->fl_pid = current->tgid;
5699 file_lock->fl_file = filp;
5700 file_lock->fl_flags = FL_POSIX;
5701 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5702 file_lock->fl_start = lock->lk_offset;
5703 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
5704 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005705
Jeff Layton21179d82012-08-21 08:03:32 -04005706 conflock = locks_alloc_lock();
5707 if (!conflock) {
5708 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5709 status = nfserr_jukebox;
5710 goto out;
5711 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005712
Jeff Layton21179d82012-08-21 08:03:32 -04005713 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07005714 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005715 case 0: /* success! */
Jeff Layton9767feb2015-10-01 09:05:50 -04005716 nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);
Al Virob8dd7b92006-10-19 23:29:01 -07005717 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005718 break;
5719 case (EAGAIN): /* conflock holds conflicting lock */
5720 status = nfserr_denied;
5721 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
Jeff Layton21179d82012-08-21 08:03:32 -04005722 nfs4_set_lock_denied(conflock, &lock->lk_denied);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005723 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005724 case (EDEADLK):
5725 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005726 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04005727 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05005728 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04005729 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005730 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005731 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005732out:
Trond Myklebustde186432014-07-10 14:07:26 -04005733 if (filp)
5734 fput(filp);
Jeff Layton5db1c032014-07-29 21:34:28 -04005735 if (lock_stp) {
5736 /* Bump seqid manually if the 4.0 replay owner is openowner */
5737 if (cstate->replay_owner &&
5738 cstate->replay_owner != &lock_sop->lo_owner &&
5739 seqid_mutating_err(ntohl(status)))
5740 lock_sop->lo_owner.so_seqid++;
5741
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005742 mutex_unlock(&lock_stp->st_mutex);
Jeff Layton35a92fe2015-09-17 07:47:08 -04005743
Jeff Layton5db1c032014-07-29 21:34:28 -04005744 /*
5745 * If this is a new, never-before-used stateid, and we are
5746 * returning an error, then just go ahead and release it.
5747 */
5748 if (status && new)
5749 release_lock_stateid(lock_stp);
5750
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005751 nfs4_put_stid(&lock_stp->st_stid);
Jeff Layton5db1c032014-07-29 21:34:28 -04005752 }
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005753 if (open_stp)
5754 nfs4_put_stid(&open_stp->st_stid);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005755 nfsd4_bump_seqid(cstate, status);
Jeff Layton21179d82012-08-21 08:03:32 -04005756 if (file_lock)
5757 locks_free_lock(file_lock);
5758 if (conflock)
5759 locks_free_lock(conflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005760 return status;
5761}
5762
5763/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005764 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5765 * so we do a temporary open here just to get an open file to pass to
5766 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5767 * inode operation.)
5768 */
Al Viro04da6e92012-04-13 00:00:04 -04005769static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005770{
5771 struct file *file;
Al Viro04da6e92012-04-13 00:00:04 -04005772 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
5773 if (!err) {
5774 err = nfserrno(vfs_test_lock(file, lock));
Christoph Hellwigfd891452015-04-28 15:41:16 +02005775 fput(file);
Al Viro04da6e92012-04-13 00:00:04 -04005776 }
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005777 return err;
5778}
5779
5780/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005781 * LOCKT operation
5782 */
Al Virob37ad282006-10-19 23:28:59 -07005783__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005784nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5785 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005786{
Jeff Layton21179d82012-08-21 08:03:32 -04005787 struct file_lock *file_lock = NULL;
Jeff Layton5db1c032014-07-29 21:34:28 -04005788 struct nfs4_lockowner *lo = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005789 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03005790 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005791
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04005792 if (locks_in_grace(SVC_NET(rqstp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005793 return nfserr_grace;
5794
5795 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
5796 return nfserr_inval;
5797
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005798 if (!nfsd4_has_session(cstate)) {
Jeff Layton4b24ca72014-06-30 11:48:44 -04005799 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005800 if (status)
5801 goto out;
5802 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005803
J. Bruce Fields75c096f2011-08-15 18:39:32 -04005804 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005805 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005806
Jeff Layton21179d82012-08-21 08:03:32 -04005807 file_lock = locks_alloc_lock();
5808 if (!file_lock) {
5809 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5810 status = nfserr_jukebox;
5811 goto out;
5812 }
Kinglong Mee6cd90662014-08-15 08:02:55 +08005813
Linus Torvalds1da177e2005-04-16 15:20:36 -07005814 switch (lockt->lt_type) {
5815 case NFS4_READ_LT:
5816 case NFS4_READW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04005817 file_lock->fl_type = F_RDLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005818 break;
5819 case NFS4_WRITE_LT:
5820 case NFS4_WRITEW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04005821 file_lock->fl_type = F_WRLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005822 break;
5823 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04005824 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005825 status = nfserr_inval;
5826 goto out;
5827 }
5828
Kinglong Meec8623992015-07-13 17:35:37 +08005829 lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005830 if (lo)
Jeff Layton21179d82012-08-21 08:03:32 -04005831 file_lock->fl_owner = (fl_owner_t)lo;
5832 file_lock->fl_pid = current->tgid;
5833 file_lock->fl_flags = FL_POSIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005834
Jeff Layton21179d82012-08-21 08:03:32 -04005835 file_lock->fl_start = lockt->lt_offset;
5836 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005837
Jeff Layton21179d82012-08-21 08:03:32 -04005838 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005839
Jeff Layton21179d82012-08-21 08:03:32 -04005840 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
Al Viro04da6e92012-04-13 00:00:04 -04005841 if (status)
Marc Eshelfd85b812006-11-28 16:26:41 -05005842 goto out;
Al Viro04da6e92012-04-13 00:00:04 -04005843
Jeff Layton21179d82012-08-21 08:03:32 -04005844 if (file_lock->fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005845 status = nfserr_denied;
Jeff Layton21179d82012-08-21 08:03:32 -04005846 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005847 }
5848out:
Jeff Layton5db1c032014-07-29 21:34:28 -04005849 if (lo)
5850 nfs4_put_stateowner(&lo->lo_owner);
Jeff Layton21179d82012-08-21 08:03:32 -04005851 if (file_lock)
5852 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005853 return status;
5854}
5855
Al Virob37ad282006-10-19 23:28:59 -07005856__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005857nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005858 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005859{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005860 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005861 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04005862 struct file_lock *file_lock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005863 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07005864 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005865 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5866
Linus Torvalds1da177e2005-04-16 15:20:36 -07005867 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5868 (long long) locku->lu_offset,
5869 (long long) locku->lu_length);
5870
5871 if (check_lock_length(locku->lu_offset, locku->lu_length))
5872 return nfserr_inval;
5873
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005874 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005875 &locku->lu_stateid, NFS4_LOCK_STID,
5876 &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005877 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005878 goto out;
Trond Myklebust11b91642014-07-29 21:34:08 -04005879 filp = find_any_file(stp->st_stid.sc_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005880 if (!filp) {
5881 status = nfserr_lock_range;
Trond Myklebust858cc572014-07-29 21:34:16 -04005882 goto put_stateid;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005883 }
Jeff Layton21179d82012-08-21 08:03:32 -04005884 file_lock = locks_alloc_lock();
5885 if (!file_lock) {
5886 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5887 status = nfserr_jukebox;
Trond Myklebustde186432014-07-10 14:07:26 -04005888 goto fput;
Jeff Layton21179d82012-08-21 08:03:32 -04005889 }
Kinglong Mee6cd90662014-08-15 08:02:55 +08005890
Jeff Layton21179d82012-08-21 08:03:32 -04005891 file_lock->fl_type = F_UNLCK;
Kinglong Meeaef95832014-08-22 10:18:44 -04005892 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
Jeff Layton21179d82012-08-21 08:03:32 -04005893 file_lock->fl_pid = current->tgid;
5894 file_lock->fl_file = filp;
5895 file_lock->fl_flags = FL_POSIX;
5896 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5897 file_lock->fl_start = locku->lu_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005898
Jeff Layton21179d82012-08-21 08:03:32 -04005899 file_lock->fl_end = last_byte_offset(locku->lu_offset,
5900 locku->lu_length);
5901 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005902
Jeff Layton21179d82012-08-21 08:03:32 -04005903 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07005904 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05005905 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005906 goto out_nfserr;
5907 }
Jeff Layton9767feb2015-10-01 09:05:50 -04005908 nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);
Trond Myklebustde186432014-07-10 14:07:26 -04005909fput:
5910 fput(filp);
Trond Myklebust858cc572014-07-29 21:34:16 -04005911put_stateid:
Oleg Drokinfeb9dad2016-06-14 23:28:04 -04005912 mutex_unlock(&stp->st_mutex);
Trond Myklebust858cc572014-07-29 21:34:16 -04005913 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005914out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005915 nfsd4_bump_seqid(cstate, status);
Jeff Layton21179d82012-08-21 08:03:32 -04005916 if (file_lock)
5917 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005918 return status;
5919
5920out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07005921 status = nfserrno(err);
Trond Myklebustde186432014-07-10 14:07:26 -04005922 goto fput;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005923}
5924
5925/*
5926 * returns
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005927 * true: locks held by lockowner
5928 * false: no locks held by lockowner
Linus Torvalds1da177e2005-04-16 15:20:36 -07005929 */
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005930static bool
5931check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005932{
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005933 struct file_lock *fl;
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005934 int status = false;
5935 struct file *filp = find_any_file(fp);
5936 struct inode *inode;
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005937 struct file_lock_context *flctx;
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005938
5939 if (!filp) {
5940 /* Any valid lock stateid should have some sort of access */
5941 WARN_ON_ONCE(1);
5942 return status;
5943 }
5944
5945 inode = file_inode(filp);
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005946 flctx = inode->i_flctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005947
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005948 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
Jeff Layton6109c852015-01-16 15:05:57 -05005949 spin_lock(&flctx->flc_lock);
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005950 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
5951 if (fl->fl_owner == (fl_owner_t)lowner) {
5952 status = true;
5953 break;
5954 }
J. Bruce Fields796dadf2006-01-18 17:43:22 -08005955 }
Jeff Layton6109c852015-01-16 15:05:57 -05005956 spin_unlock(&flctx->flc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005957 }
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005958 fput(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005959 return status;
5960}
5961
Al Virob37ad282006-10-19 23:28:59 -07005962__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08005963nfsd4_release_lockowner(struct svc_rqst *rqstp,
5964 struct nfsd4_compound_state *cstate,
5965 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005966{
5967 clientid_t *clid = &rlockowner->rl_clientid;
Jeff Layton882e9d22014-07-29 21:34:37 -04005968 struct nfs4_stateowner *sop;
5969 struct nfs4_lockowner *lo = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005970 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005971 struct xdr_netobj *owner = &rlockowner->rl_owner;
Trond Myklebustd4f04892014-07-29 21:34:36 -04005972 unsigned int hashval = ownerstr_hashval(owner);
Al Virob37ad282006-10-19 23:28:59 -07005973 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03005974 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005975 struct nfs4_client *clp;
Chuck Lever88584812016-07-13 16:40:14 -04005976 LIST_HEAD (reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005977
5978 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5979 clid->cl_boot, clid->cl_id);
5980
Jeff Layton4b24ca72014-06-30 11:48:44 -04005981 status = lookup_clientid(clid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005982 if (status)
Trond Myklebust51f5e782014-07-30 08:27:27 -04005983 return status;
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005984
Trond Myklebustd4f04892014-07-29 21:34:36 -04005985 clp = cstate->clp;
Jeff Laytonfd449072014-06-30 11:48:41 -04005986 /* Find the matching lock stateowner */
Trond Myklebustd4f04892014-07-29 21:34:36 -04005987 spin_lock(&clp->cl_lock);
Jeff Layton882e9d22014-07-29 21:34:37 -04005988 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
Trond Myklebustd4f04892014-07-29 21:34:36 -04005989 so_strhash) {
Jeff Layton882e9d22014-07-29 21:34:37 -04005990
5991 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05005992 continue;
Jeff Laytonfd449072014-06-30 11:48:41 -04005993
Jeff Layton882e9d22014-07-29 21:34:37 -04005994 /* see if there are still any locks associated with it */
5995 lo = lockowner(sop);
5996 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
5997 if (check_for_locks(stp->st_stid.sc_file, lo)) {
5998 status = nfserr_locks_held;
5999 spin_unlock(&clp->cl_lock);
Trond Myklebust51f5e782014-07-30 08:27:27 -04006000 return status;
Jeff Layton882e9d22014-07-29 21:34:37 -04006001 }
Jeff Layton5adfd882014-07-29 21:34:31 -04006002 }
Jeff Layton882e9d22014-07-29 21:34:37 -04006003
Kinglong Meeb5971af2014-08-22 10:18:43 -04006004 nfs4_get_stateowner(sop);
Jeff Layton882e9d22014-07-29 21:34:37 -04006005 break;
Jeff Laytonfd449072014-06-30 11:48:41 -04006006 }
Chuck Lever88584812016-07-13 16:40:14 -04006007 if (!lo) {
6008 spin_unlock(&clp->cl_lock);
6009 return status;
6010 }
6011
6012 unhash_lockowner_locked(lo);
6013 while (!list_empty(&lo->lo_owner.so_stateids)) {
6014 stp = list_first_entry(&lo->lo_owner.so_stateids,
6015 struct nfs4_ol_stateid,
6016 st_perstateowner);
6017 WARN_ON(!unhash_lock_stateid(stp));
6018 put_ol_stateid_locked(stp, &reaplist);
6019 }
Trond Myklebustc58c6612014-07-29 21:34:35 -04006020 spin_unlock(&clp->cl_lock);
Chuck Lever88584812016-07-13 16:40:14 -04006021 free_ol_stateid_reaplist(&reaplist);
6022 nfs4_put_stateowner(&lo->lo_owner);
6023
Linus Torvalds1da177e2005-04-16 15:20:36 -07006024 return status;
6025}
6026
6027static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07006028alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006029{
NeilBrowna55370a2005-06-23 22:03:52 -07006030 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006031}
6032
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05006033bool
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006034nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
NeilBrownc7b9a452005-06-23 22:04:30 -07006035{
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05006036 struct nfs4_client_reclaim *crp;
NeilBrownc7b9a452005-06-23 22:04:30 -07006037
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006038 crp = nfsd4_find_reclaim_client(name, nn);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05006039 return (crp && crp->cr_clp);
NeilBrownc7b9a452005-06-23 22:04:30 -07006040}
6041
Linus Torvalds1da177e2005-04-16 15:20:36 -07006042/*
6043 * failure => all reset bets are off, nfserr_no_grace...
6044 */
Jeff Layton772a9bb2012-11-12 15:00:54 -05006045struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006046nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006047{
6048 unsigned int strhashval;
Jeff Layton772a9bb2012-11-12 15:00:54 -05006049 struct nfs4_client_reclaim *crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006050
NeilBrowna55370a2005-06-23 22:03:52 -07006051 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
6052 crp = alloc_reclaim();
Jeff Layton772a9bb2012-11-12 15:00:54 -05006053 if (crp) {
6054 strhashval = clientstr_hashval(name);
6055 INIT_LIST_HEAD(&crp->cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006056 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
Jeff Layton772a9bb2012-11-12 15:00:54 -05006057 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05006058 crp->cr_clp = NULL;
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006059 nn->reclaim_str_hashtbl_size++;
Jeff Layton772a9bb2012-11-12 15:00:54 -05006060 }
6061 return crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006062}
6063
Jeff Layton2a4317c2012-03-21 16:42:43 -04006064void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006065nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
Jeff Laytonce30e532012-11-12 15:00:53 -05006066{
6067 list_del(&crp->cr_strhash);
6068 kfree(crp);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006069 nn->reclaim_str_hashtbl_size--;
Jeff Laytonce30e532012-11-12 15:00:53 -05006070}
6071
6072void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006073nfs4_release_reclaim(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006074{
6075 struct nfs4_client_reclaim *crp = NULL;
6076 int i;
6077
Linus Torvalds1da177e2005-04-16 15:20:36 -07006078 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006079 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
6080 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
Linus Torvalds1da177e2005-04-16 15:20:36 -07006081 struct nfs4_client_reclaim, cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006082 nfs4_remove_reclaim_record(crp, nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006083 }
6084 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05006085 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006086}
6087
6088/*
6089 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
Jeff Layton2a4317c2012-03-21 16:42:43 -04006090struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006091nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006092{
6093 unsigned int strhashval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006094 struct nfs4_client_reclaim *crp = NULL;
6095
Jeff Layton278c9312012-11-12 15:00:52 -05006096 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006097
Jeff Layton278c9312012-11-12 15:00:52 -05006098 strhashval = clientstr_hashval(recdir);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03006099 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
Jeff Layton278c9312012-11-12 15:00:52 -05006100 if (same_name(crp->cr_recdir, recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006101 return crp;
6102 }
6103 }
6104 return NULL;
6105}
6106
6107/*
6108* Called from OPEN. Look for clientid in reclaim list.
6109*/
Al Virob37ad282006-10-19 23:28:59 -07006110__be32
Trond Myklebust0fe492d2014-06-30 11:48:47 -04006111nfs4_check_open_reclaim(clientid_t *clid,
6112 struct nfsd4_compound_state *cstate,
6113 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006114{
Trond Myklebust0fe492d2014-06-30 11:48:47 -04006115 __be32 status;
Jeff Laytona52d7262012-03-21 09:52:02 -04006116
6117 /* find clientid in conf_id_hashtbl */
Trond Myklebust0fe492d2014-06-30 11:48:47 -04006118 status = lookup_clientid(clid, cstate, nn);
6119 if (status)
Jeff Laytona52d7262012-03-21 09:52:02 -04006120 return nfserr_reclaim_bad;
6121
Jeff Layton3b3e7b72014-09-12 16:40:22 -04006122 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
6123 return nfserr_no_grace;
6124
Trond Myklebust0fe492d2014-06-30 11:48:47 -04006125 if (nfsd4_client_record_check(cstate->clp))
6126 return nfserr_reclaim_bad;
6127
6128 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006129}
6130
Bryan Schumaker65178db2011-11-01 13:35:21 -04006131#ifdef CONFIG_NFSD_FAULT_INJECTION
Jeff Layton016200c2014-07-30 08:27:21 -04006132static inline void
6133put_client(struct nfs4_client *clp)
6134{
6135 atomic_dec(&clp->cl_refcount);
6136}
6137
Jeff Layton285abde2014-07-30 08:27:24 -04006138static struct nfs4_client *
6139nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
6140{
6141 struct nfs4_client *clp;
6142 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6143 nfsd_net_id);
6144
6145 if (!nfsd_netns_ready(nn))
6146 return NULL;
6147
6148 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6149 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
6150 return clp;
6151 }
6152 return NULL;
6153}
6154
Jeff Layton7ec0e362014-07-30 08:27:17 -04006155u64
Jeff Layton285abde2014-07-30 08:27:24 -04006156nfsd_inject_print_clients(void)
Jeff Layton7ec0e362014-07-30 08:27:17 -04006157{
6158 struct nfs4_client *clp;
6159 u64 count = 0;
6160 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6161 nfsd_net_id);
6162 char buf[INET6_ADDRSTRLEN];
6163
6164 if (!nfsd_netns_ready(nn))
6165 return 0;
6166
6167 spin_lock(&nn->client_lock);
6168 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6169 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
6170 pr_info("NFS Client: %s\n", buf);
6171 ++count;
6172 }
6173 spin_unlock(&nn->client_lock);
6174
6175 return count;
6176}
Bryan Schumaker65178db2011-11-01 13:35:21 -04006177
Jeff Laytona0926d12014-07-30 08:27:18 -04006178u64
Jeff Layton285abde2014-07-30 08:27:24 -04006179nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size)
Jeff Laytona0926d12014-07-30 08:27:18 -04006180{
6181 u64 count = 0;
6182 struct nfs4_client *clp;
6183 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6184 nfsd_net_id);
6185
6186 if (!nfsd_netns_ready(nn))
6187 return count;
6188
6189 spin_lock(&nn->client_lock);
6190 clp = nfsd_find_client(addr, addr_size);
6191 if (clp) {
6192 if (mark_client_expired_locked(clp) == nfs_ok)
6193 ++count;
6194 else
6195 clp = NULL;
6196 }
6197 spin_unlock(&nn->client_lock);
6198
6199 if (clp)
6200 expire_client(clp);
6201
6202 return count;
6203}
6204
Jeff Layton69fc9ed2014-07-30 08:27:19 -04006205u64
Jeff Layton285abde2014-07-30 08:27:24 -04006206nfsd_inject_forget_clients(u64 max)
Jeff Layton69fc9ed2014-07-30 08:27:19 -04006207{
6208 u64 count = 0;
6209 struct nfs4_client *clp, *next;
6210 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6211 nfsd_net_id);
6212 LIST_HEAD(reaplist);
6213
6214 if (!nfsd_netns_ready(nn))
6215 return count;
6216
6217 spin_lock(&nn->client_lock);
6218 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6219 if (mark_client_expired_locked(clp) == nfs_ok) {
6220 list_add(&clp->cl_lru, &reaplist);
6221 if (max != 0 && ++count >= max)
6222 break;
6223 }
6224 }
6225 spin_unlock(&nn->client_lock);
6226
6227 list_for_each_entry_safe(clp, next, &reaplist, cl_lru)
6228 expire_client(clp);
6229
6230 return count;
6231}
6232
Bryan Schumaker184c1842012-11-29 11:40:44 -05006233static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
6234 const char *type)
6235{
6236 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05006237 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05006238 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
6239}
6240
Jeff Layton016200c2014-07-30 08:27:21 -04006241static void
6242nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
6243 struct list_head *collect)
6244{
6245 struct nfs4_client *clp = lst->st_stid.sc_client;
6246 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6247 nfsd_net_id);
6248
6249 if (!collect)
6250 return;
6251
6252 lockdep_assert_held(&nn->client_lock);
6253 atomic_inc(&clp->cl_refcount);
6254 list_add(&lst->st_locks, collect);
6255}
6256
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006257static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
Jeff Layton3738d502014-07-30 08:27:20 -04006258 struct list_head *collect,
Jeff Laytone8568732015-08-24 12:41:47 -04006259 bool (*func)(struct nfs4_ol_stateid *))
Bryan Schumakerfc291712012-11-29 11:40:40 -05006260{
6261 struct nfs4_openowner *oop;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006262 struct nfs4_ol_stateid *stp, *st_next;
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006263 struct nfs4_ol_stateid *lst, *lst_next;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006264 u64 count = 0;
6265
Jeff Layton016200c2014-07-30 08:27:21 -04006266 spin_lock(&clp->cl_lock);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006267 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006268 list_for_each_entry_safe(stp, st_next,
6269 &oop->oo_owner.so_stateids, st_perstateowner) {
6270 list_for_each_entry_safe(lst, lst_next,
6271 &stp->st_locks, st_locks) {
Jeff Layton3738d502014-07-30 08:27:20 -04006272 if (func) {
Jeff Laytone8568732015-08-24 12:41:47 -04006273 if (func(lst))
6274 nfsd_inject_add_lock_to_list(lst,
6275 collect);
Jeff Layton3738d502014-07-30 08:27:20 -04006276 }
Jeff Layton016200c2014-07-30 08:27:21 -04006277 ++count;
6278 /*
6279 * Despite the fact that these functions deal
6280 * with 64-bit integers for "count", we must
6281 * ensure that it doesn't blow up the
6282 * clp->cl_refcount. Throw a warning if we
6283 * start to approach INT_MAX here.
6284 */
6285 WARN_ON_ONCE(count == (INT_MAX / 2));
6286 if (count == max)
6287 goto out;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006288 }
6289 }
6290 }
Jeff Layton016200c2014-07-30 08:27:21 -04006291out:
6292 spin_unlock(&clp->cl_lock);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006293
6294 return count;
6295}
6296
Jeff Layton016200c2014-07-30 08:27:21 -04006297static u64
6298nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect,
6299 u64 max)
Bryan Schumakerfc291712012-11-29 11:40:40 -05006300{
Jeff Layton016200c2014-07-30 08:27:21 -04006301 return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006302}
6303
Jeff Layton016200c2014-07-30 08:27:21 -04006304static u64
6305nfsd_print_client_locks(struct nfs4_client *clp)
Bryan Schumaker184c1842012-11-29 11:40:44 -05006306{
Jeff Layton016200c2014-07-30 08:27:21 -04006307 u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006308 nfsd_print_count(clp, count, "locked files");
6309 return count;
6310}
6311
Jeff Layton016200c2014-07-30 08:27:21 -04006312u64
Jeff Layton285abde2014-07-30 08:27:24 -04006313nfsd_inject_print_locks(void)
Jeff Layton016200c2014-07-30 08:27:21 -04006314{
6315 struct nfs4_client *clp;
6316 u64 count = 0;
6317 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6318 nfsd_net_id);
6319
6320 if (!nfsd_netns_ready(nn))
6321 return 0;
6322
6323 spin_lock(&nn->client_lock);
6324 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6325 count += nfsd_print_client_locks(clp);
6326 spin_unlock(&nn->client_lock);
6327
6328 return count;
6329}
6330
6331static void
6332nfsd_reap_locks(struct list_head *reaplist)
6333{
6334 struct nfs4_client *clp;
6335 struct nfs4_ol_stateid *stp, *next;
6336
6337 list_for_each_entry_safe(stp, next, reaplist, st_locks) {
6338 list_del_init(&stp->st_locks);
6339 clp = stp->st_stid.sc_client;
6340 nfs4_put_stid(&stp->st_stid);
6341 put_client(clp);
6342 }
6343}
6344
6345u64
Jeff Layton285abde2014-07-30 08:27:24 -04006346nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size)
Jeff Layton016200c2014-07-30 08:27:21 -04006347{
6348 unsigned int count = 0;
6349 struct nfs4_client *clp;
6350 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6351 nfsd_net_id);
6352 LIST_HEAD(reaplist);
6353
6354 if (!nfsd_netns_ready(nn))
6355 return count;
6356
6357 spin_lock(&nn->client_lock);
6358 clp = nfsd_find_client(addr, addr_size);
6359 if (clp)
6360 count = nfsd_collect_client_locks(clp, &reaplist, 0);
6361 spin_unlock(&nn->client_lock);
6362 nfsd_reap_locks(&reaplist);
6363 return count;
6364}
6365
6366u64
Jeff Layton285abde2014-07-30 08:27:24 -04006367nfsd_inject_forget_locks(u64 max)
Jeff Layton016200c2014-07-30 08:27:21 -04006368{
6369 u64 count = 0;
6370 struct nfs4_client *clp;
6371 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6372 nfsd_net_id);
6373 LIST_HEAD(reaplist);
6374
6375 if (!nfsd_netns_ready(nn))
6376 return count;
6377
6378 spin_lock(&nn->client_lock);
6379 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6380 count += nfsd_collect_client_locks(clp, &reaplist, max - count);
6381 if (max != 0 && count >= max)
6382 break;
6383 }
6384 spin_unlock(&nn->client_lock);
6385 nfsd_reap_locks(&reaplist);
6386 return count;
6387}
6388
Jeff Layton82e05ef2014-07-30 08:27:22 -04006389static u64
6390nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
6391 struct list_head *collect,
6392 void (*func)(struct nfs4_openowner *))
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006393{
6394 struct nfs4_openowner *oop, *next;
Jeff Layton82e05ef2014-07-30 08:27:22 -04006395 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6396 nfsd_net_id);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006397 u64 count = 0;
6398
Jeff Layton82e05ef2014-07-30 08:27:22 -04006399 lockdep_assert_held(&nn->client_lock);
6400
6401 spin_lock(&clp->cl_lock);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006402 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
Jeff Layton82e05ef2014-07-30 08:27:22 -04006403 if (func) {
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006404 func(oop);
Jeff Layton82e05ef2014-07-30 08:27:22 -04006405 if (collect) {
6406 atomic_inc(&clp->cl_refcount);
6407 list_add(&oop->oo_perclient, collect);
6408 }
6409 }
6410 ++count;
6411 /*
6412 * Despite the fact that these functions deal with
6413 * 64-bit integers for "count", we must ensure that
6414 * it doesn't blow up the clp->cl_refcount. Throw a
6415 * warning if we start to approach INT_MAX here.
6416 */
6417 WARN_ON_ONCE(count == (INT_MAX / 2));
6418 if (count == max)
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006419 break;
6420 }
Jeff Layton82e05ef2014-07-30 08:27:22 -04006421 spin_unlock(&clp->cl_lock);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006422
6423 return count;
6424}
6425
Jeff Layton82e05ef2014-07-30 08:27:22 -04006426static u64
6427nfsd_print_client_openowners(struct nfs4_client *clp)
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006428{
Jeff Layton82e05ef2014-07-30 08:27:22 -04006429 u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL);
6430
6431 nfsd_print_count(clp, count, "openowners");
6432 return count;
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006433}
6434
Jeff Layton82e05ef2014-07-30 08:27:22 -04006435static u64
6436nfsd_collect_client_openowners(struct nfs4_client *clp,
6437 struct list_head *collect, u64 max)
Bryan Schumaker184c1842012-11-29 11:40:44 -05006438{
Jeff Layton82e05ef2014-07-30 08:27:22 -04006439 return nfsd_foreach_client_openowner(clp, max, collect,
6440 unhash_openowner_locked);
6441}
6442
6443u64
Jeff Layton285abde2014-07-30 08:27:24 -04006444nfsd_inject_print_openowners(void)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006445{
6446 struct nfs4_client *clp;
6447 u64 count = 0;
6448 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6449 nfsd_net_id);
6450
6451 if (!nfsd_netns_ready(nn))
6452 return 0;
6453
6454 spin_lock(&nn->client_lock);
6455 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6456 count += nfsd_print_client_openowners(clp);
6457 spin_unlock(&nn->client_lock);
6458
6459 return count;
6460}
6461
6462static void
6463nfsd_reap_openowners(struct list_head *reaplist)
6464{
6465 struct nfs4_client *clp;
6466 struct nfs4_openowner *oop, *next;
6467
6468 list_for_each_entry_safe(oop, next, reaplist, oo_perclient) {
6469 list_del_init(&oop->oo_perclient);
6470 clp = oop->oo_owner.so_client;
6471 release_openowner(oop);
6472 put_client(clp);
6473 }
6474}
6475
6476u64
Jeff Layton285abde2014-07-30 08:27:24 -04006477nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr,
6478 size_t addr_size)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006479{
6480 unsigned int count = 0;
6481 struct nfs4_client *clp;
6482 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6483 nfsd_net_id);
6484 LIST_HEAD(reaplist);
6485
6486 if (!nfsd_netns_ready(nn))
6487 return count;
6488
6489 spin_lock(&nn->client_lock);
6490 clp = nfsd_find_client(addr, addr_size);
6491 if (clp)
6492 count = nfsd_collect_client_openowners(clp, &reaplist, 0);
6493 spin_unlock(&nn->client_lock);
6494 nfsd_reap_openowners(&reaplist);
6495 return count;
6496}
6497
6498u64
Jeff Layton285abde2014-07-30 08:27:24 -04006499nfsd_inject_forget_openowners(u64 max)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006500{
6501 u64 count = 0;
6502 struct nfs4_client *clp;
6503 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6504 nfsd_net_id);
6505 LIST_HEAD(reaplist);
6506
6507 if (!nfsd_netns_ready(nn))
6508 return count;
6509
6510 spin_lock(&nn->client_lock);
6511 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6512 count += nfsd_collect_client_openowners(clp, &reaplist,
6513 max - count);
6514 if (max != 0 && count >= max)
6515 break;
6516 }
6517 spin_unlock(&nn->client_lock);
6518 nfsd_reap_openowners(&reaplist);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006519 return count;
6520}
6521
Bryan Schumaker269de302012-11-29 11:40:42 -05006522static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
6523 struct list_head *victims)
6524{
6525 struct nfs4_delegation *dp, *next;
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006526 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6527 nfsd_net_id);
Bryan Schumaker269de302012-11-29 11:40:42 -05006528 u64 count = 0;
6529
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006530 lockdep_assert_held(&nn->client_lock);
6531
6532 spin_lock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05006533 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
Jeff Laytondff13992014-07-08 14:02:49 -04006534 if (victims) {
6535 /*
6536 * It's not safe to mess with delegations that have a
6537 * non-zero dl_time. They might have already been broken
6538 * and could be processed by the laundromat outside of
6539 * the state_lock. Just leave them be.
6540 */
6541 if (dp->dl_time != 0)
6542 continue;
6543
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006544 atomic_inc(&clp->cl_refcount);
Jeff Layton3fcbbd22015-08-24 12:41:48 -04006545 WARN_ON(!unhash_delegation_locked(dp));
Jeff Layton42690672014-07-25 07:34:20 -04006546 list_add(&dp->dl_recall_lru, victims);
Jeff Laytondff13992014-07-08 14:02:49 -04006547 }
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006548 ++count;
6549 /*
6550 * Despite the fact that these functions deal with
6551 * 64-bit integers for "count", we must ensure that
6552 * it doesn't blow up the clp->cl_refcount. Throw a
6553 * warning if we start to approach INT_MAX here.
6554 */
6555 WARN_ON_ONCE(count == (INT_MAX / 2));
6556 if (count == max)
Bryan Schumaker269de302012-11-29 11:40:42 -05006557 break;
6558 }
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006559 spin_unlock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05006560 return count;
6561}
6562
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006563static u64
6564nfsd_print_client_delegations(struct nfs4_client *clp)
Bryan Schumaker269de302012-11-29 11:40:42 -05006565{
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006566 u64 count = nfsd_find_all_delegations(clp, 0, NULL);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006567
6568 nfsd_print_count(clp, count, "delegations");
6569 return count;
6570}
6571
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006572u64
Jeff Layton285abde2014-07-30 08:27:24 -04006573nfsd_inject_print_delegations(void)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006574{
6575 struct nfs4_client *clp;
6576 u64 count = 0;
6577 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6578 nfsd_net_id);
6579
6580 if (!nfsd_netns_ready(nn))
6581 return 0;
6582
6583 spin_lock(&nn->client_lock);
6584 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6585 count += nfsd_print_client_delegations(clp);
6586 spin_unlock(&nn->client_lock);
6587
6588 return count;
6589}
6590
6591static void
6592nfsd_forget_delegations(struct list_head *reaplist)
6593{
6594 struct nfs4_client *clp;
6595 struct nfs4_delegation *dp, *next;
6596
6597 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6598 list_del_init(&dp->dl_recall_lru);
6599 clp = dp->dl_stid.sc_client;
6600 revoke_delegation(dp);
6601 put_client(clp);
6602 }
6603}
6604
6605u64
Jeff Layton285abde2014-07-30 08:27:24 -04006606nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr,
6607 size_t addr_size)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006608{
6609 u64 count = 0;
6610 struct nfs4_client *clp;
6611 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6612 nfsd_net_id);
6613 LIST_HEAD(reaplist);
6614
6615 if (!nfsd_netns_ready(nn))
6616 return count;
6617
6618 spin_lock(&nn->client_lock);
6619 clp = nfsd_find_client(addr, addr_size);
6620 if (clp)
6621 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6622 spin_unlock(&nn->client_lock);
6623
6624 nfsd_forget_delegations(&reaplist);
6625 return count;
6626}
6627
6628u64
Jeff Layton285abde2014-07-30 08:27:24 -04006629nfsd_inject_forget_delegations(u64 max)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006630{
6631 u64 count = 0;
6632 struct nfs4_client *clp;
6633 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6634 nfsd_net_id);
6635 LIST_HEAD(reaplist);
6636
6637 if (!nfsd_netns_ready(nn))
6638 return count;
6639
6640 spin_lock(&nn->client_lock);
6641 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6642 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6643 if (max != 0 && count >= max)
6644 break;
6645 }
6646 spin_unlock(&nn->client_lock);
6647 nfsd_forget_delegations(&reaplist);
6648 return count;
6649}
6650
6651static void
6652nfsd_recall_delegations(struct list_head *reaplist)
6653{
6654 struct nfs4_client *clp;
6655 struct nfs4_delegation *dp, *next;
6656
6657 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6658 list_del_init(&dp->dl_recall_lru);
6659 clp = dp->dl_stid.sc_client;
6660 /*
6661 * We skipped all entries that had a zero dl_time before,
6662 * so we can now reset the dl_time back to 0. If a delegation
6663 * break comes in now, then it won't make any difference since
6664 * we're recalling it either way.
6665 */
6666 spin_lock(&state_lock);
6667 dp->dl_time = 0;
6668 spin_unlock(&state_lock);
6669 nfsd_break_one_deleg(dp);
6670 put_client(clp);
6671 }
6672}
6673
6674u64
Jeff Layton285abde2014-07-30 08:27:24 -04006675nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr,
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006676 size_t addr_size)
6677{
6678 u64 count = 0;
6679 struct nfs4_client *clp;
6680 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6681 nfsd_net_id);
6682 LIST_HEAD(reaplist);
6683
6684 if (!nfsd_netns_ready(nn))
6685 return count;
6686
6687 spin_lock(&nn->client_lock);
6688 clp = nfsd_find_client(addr, addr_size);
6689 if (clp)
6690 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6691 spin_unlock(&nn->client_lock);
6692
6693 nfsd_recall_delegations(&reaplist);
6694 return count;
6695}
6696
6697u64
Jeff Layton285abde2014-07-30 08:27:24 -04006698nfsd_inject_recall_delegations(u64 max)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006699{
6700 u64 count = 0;
6701 struct nfs4_client *clp, *next;
6702 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6703 nfsd_net_id);
6704 LIST_HEAD(reaplist);
6705
6706 if (!nfsd_netns_ready(nn))
6707 return count;
6708
6709 spin_lock(&nn->client_lock);
6710 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6711 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6712 if (max != 0 && ++count >= max)
6713 break;
6714 }
6715 spin_unlock(&nn->client_lock);
6716 nfsd_recall_delegations(&reaplist);
6717 return count;
6718}
Bryan Schumaker65178db2011-11-01 13:35:21 -04006719#endif /* CONFIG_NFSD_FAULT_INJECTION */
6720
Meelap Shahc2f1a552007-07-17 04:04:39 -07006721/*
6722 * Since the lifetime of a delegation isn't limited to that of an open, a
6723 * client may quite reasonably hang on to a delegation as long as it has
6724 * the inode cached. This becomes an obvious problem the first time a
6725 * client's inode cache approaches the size of the server's total memory.
6726 *
6727 * For now we avoid this problem by imposing a hard limit on the number
6728 * of delegations, which varies according to the server's memory size.
6729 */
6730static void
6731set_max_delegations(void)
6732{
6733 /*
6734 * Allow at most 4 delegations per megabyte of RAM. Quick
6735 * estimates suggest that in the worst case (where every delegation
6736 * is for a different inode), a delegation could take about 1.5K,
6737 * giving a worst case usage of about 6% of memory.
6738 */
6739 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
6740}
6741
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006742static int nfs4_state_create_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006743{
6744 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6745 int i;
6746
6747 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6748 CLIENT_HASH_SIZE, GFP_KERNEL);
6749 if (!nn->conf_id_hashtbl)
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006750 goto err;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006751 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6752 CLIENT_HASH_SIZE, GFP_KERNEL);
6753 if (!nn->unconf_id_hashtbl)
6754 goto err_unconf_id;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006755 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
6756 SESSION_HASH_SIZE, GFP_KERNEL);
6757 if (!nn->sessionid_hashtbl)
6758 goto err_sessionid;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006759
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006760 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006761 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006762 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006763 }
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006764 for (i = 0; i < SESSION_HASH_SIZE; i++)
6765 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006766 nn->conf_name_tree = RB_ROOT;
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006767 nn->unconf_name_tree = RB_ROOT;
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03006768 INIT_LIST_HEAD(&nn->client_lru);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03006769 INIT_LIST_HEAD(&nn->close_lru);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04006770 INIT_LIST_HEAD(&nn->del_recall_lru);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03006771 spin_lock_init(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006772
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006773 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006774 get_net(net);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006775
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006776 return 0;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006777
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006778err_sessionid:
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03006779 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006780err_unconf_id:
6781 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006782err:
6783 return -ENOMEM;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006784}
6785
6786static void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006787nfs4_state_destroy_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006788{
6789 int i;
6790 struct nfs4_client *clp = NULL;
6791 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6792
6793 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6794 while (!list_empty(&nn->conf_id_hashtbl[i])) {
6795 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6796 destroy_client(clp);
6797 }
6798 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006799
Kinglong Mee2b905632014-03-26 22:09:30 +08006800 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6801 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
6802 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6803 destroy_client(clp);
6804 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006805 }
6806
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006807 kfree(nn->sessionid_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006808 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006809 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006810 put_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006811}
6812
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03006813int
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006814nfs4_state_start_net(struct net *net)
NeilBrownac4d8ff22005-06-23 22:03:30 -07006815{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04006816 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006817 int ret;
6818
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006819 ret = nfs4_state_create_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006820 if (ret)
6821 return ret;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04006822 nn->boot_time = get_seconds();
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04006823 nn->grace_ended = false;
J. Bruce Fieldsc87fb4a2015-08-06 12:47:02 -04006824 nn->nfsd4_manager.block_opens = true;
Jeff Laytond4318ac2014-09-12 16:40:21 -04006825 locks_start_grace(net, &nn->nfsd4_manager);
6826 nfsd4_client_tracking_init(net);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006827 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03006828 nn->nfsd4_grace, net);
6829 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006830 return 0;
6831}
6832
6833/* initialization to perform when the nfsd service is started: */
6834
6835int
6836nfs4_state_start(void)
6837{
6838 int ret;
6839
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006840 ret = set_callback_cred();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006841 if (ret)
6842 return -ENOMEM;
Jeff Layton51a54562015-08-20 07:17:01 -04006843 laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
Jeff Laytona6d6b782012-03-05 11:42:36 -05006844 if (laundry_wq == NULL) {
6845 ret = -ENOMEM;
6846 goto out_recovery;
6847 }
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006848 ret = nfsd4_create_callback_queue();
6849 if (ret)
6850 goto out_free_laundry;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006851
Meelap Shahc2f1a552007-07-17 04:04:39 -07006852 set_max_delegations();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006853
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006854 return 0;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006855
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006856out_free_laundry:
6857 destroy_workqueue(laundry_wq);
Jeff Laytona6d6b782012-03-05 11:42:36 -05006858out_recovery:
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006859 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006860}
6861
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03006862void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006863nfs4_state_shutdown_net(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006864{
Linus Torvalds1da177e2005-04-16 15:20:36 -07006865 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006866 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006867 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006868
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006869 cancel_delayed_work_sync(&nn->laundromat_work);
6870 locks_end_grace(&nn->nfsd4_manager);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05006871
Linus Torvalds1da177e2005-04-16 15:20:36 -07006872 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04006873 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04006874 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006875 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Jeff Layton3fcbbd22015-08-24 12:41:48 -04006876 WARN_ON(!unhash_delegation_locked(dp));
Jeff Layton42690672014-07-25 07:34:20 -04006877 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006878 }
Benny Halevycdc97502014-05-30 09:09:30 -04006879 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006880 list_for_each_safe(pos, next, &reaplist) {
6881 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Jeff Layton42690672014-07-25 07:34:20 -04006882 list_del_init(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +02006883 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -04006884 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
Trond Myklebust60116952014-07-29 21:34:06 -04006885 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006886 }
6887
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03006888 nfsd4_client_tracking_exit(net);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006889 nfs4_state_destroy_net(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006890}
6891
6892void
6893nfs4_state_shutdown(void)
6894{
NeilBrown5e8d5c22006-04-10 22:55:37 -07006895 destroy_workqueue(laundry_wq);
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04006896 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07006897}
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006898
6899static void
6900get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
6901{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01006902 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
6903 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006904}
6905
6906static void
6907put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
6908{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01006909 if (cstate->minorversion) {
6910 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
6911 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
6912 }
6913}
6914
6915void
6916clear_current_stateid(struct nfsd4_compound_state *cstate)
6917{
6918 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006919}
6920
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006921/*
6922 * functions to set current state id
6923 */
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006924void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01006925nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
6926{
6927 put_stateid(cstate, &odp->od_stateid);
6928}
6929
6930void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006931nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
6932{
6933 put_stateid(cstate, &open->op_stateid);
6934}
6935
6936void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006937nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
6938{
6939 put_stateid(cstate, &close->cl_stateid);
6940}
6941
6942void
6943nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
6944{
6945 put_stateid(cstate, &lock->lk_resp_stateid);
6946}
6947
6948/*
6949 * functions to consume current state id
6950 */
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01006951
6952void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01006953nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
6954{
6955 get_stateid(cstate, &odp->od_stateid);
6956}
6957
6958void
6959nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
6960{
6961 get_stateid(cstate, &drp->dr_stateid);
6962}
6963
6964void
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01006965nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
6966{
6967 get_stateid(cstate, &fsp->fr_stateid);
6968}
6969
6970void
6971nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
6972{
6973 get_stateid(cstate, &setattr->sa_stateid);
6974}
6975
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006976void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006977nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
6978{
6979 get_stateid(cstate, &close->cl_stateid);
6980}
6981
6982void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006983nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006984{
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006985 get_stateid(cstate, &locku->lu_stateid);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006986}
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01006987
6988void
6989nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
6990{
6991 get_stateid(cstate, &read->rd_stateid);
6992}
6993
6994void
6995nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
6996{
6997 get_stateid(cstate, &write->wr_stateid);
6998}