blob: b24f19d4187a7d7808fb41bfac1d8a3b742d254d [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>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050040#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton363168b2009-08-14 12:57:56 -040041#include <linux/sunrpc/clnt.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020042#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050043#include "vfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#define NFSDDBG_FACILITY NFSDDBG_PROC
46
47/* Globals */
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -050048time_t nfsd4_lease = 90; /* default lease time */
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050049time_t nfsd4_grace = 90;
NeilBrownfd39ca92005-06-23 22:04:03 -070050static time_t boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051static u32 current_ownerid = 1;
52static u32 current_fileid = 1;
53static u32 current_delegid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070054static stateid_t zerostateid; /* bits all 0 */
55static stateid_t onestateid; /* bits all 1 */
Andy Adamsonec6b5d72009-04-03 08:28:28 +030056static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070057
58#define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
59#define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/* forward declarations */
NeilBrownfd39ca92005-06-23 22:04:03 -070062static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
NeilBrown0964a3d2005-06-23 22:04:32 -070064static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
65static void nfs4_set_recdir(char *recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
J. Bruce Fields8b671b82009-02-22 14:51:34 -080067/* Locking: */
68
69/* Currently used for almost all code touching nfsv4 state: */
Ingo Molnar353ab6e2006-03-26 01:37:12 -080070static DEFINE_MUTEX(client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
J. Bruce Fields8b671b82009-02-22 14:51:34 -080072/*
73 * Currently used for the del_recall_lru and file hash table. In an
74 * effort to decrease the scope of the client_mutex, this spinlock may
75 * eventually cover more:
76 */
77static DEFINE_SPINLOCK(recall_lock);
78
Christoph Lametere18b8902006-12-06 20:33:20 -080079static struct kmem_cache *stateowner_slab = NULL;
80static struct kmem_cache *file_slab = NULL;
81static struct kmem_cache *stateid_slab = NULL;
82static struct kmem_cache *deleg_slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -070083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084void
85nfs4_lock_state(void)
86{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080087 mutex_lock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088}
89
90void
91nfs4_unlock_state(void)
92{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080093 mutex_unlock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
96static inline u32
97opaque_hashval(const void *ptr, int nbytes)
98{
99 unsigned char *cptr = (unsigned char *) ptr;
100
101 u32 x = 0;
102 while (nbytes--) {
103 x *= 37;
104 x += *cptr++;
105 }
106 return x;
107}
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109static struct list_head del_recall_lru;
110
NeilBrown13cd2182005-06-23 22:03:10 -0700111static inline void
112put_nfs4_file(struct nfs4_file *fi)
113{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800114 if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) {
115 list_del(&fi->fi_hash);
116 spin_unlock(&recall_lock);
117 iput(fi->fi_inode);
118 kmem_cache_free(file_slab, fi);
119 }
NeilBrown13cd2182005-06-23 22:03:10 -0700120}
121
122static inline void
123get_nfs4_file(struct nfs4_file *fi)
124{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800125 atomic_inc(&fi->fi_ref);
NeilBrown13cd2182005-06-23 22:03:10 -0700126}
127
NeilBrownef0f3392006-04-10 22:55:41 -0700128static int num_delegations;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700129unsigned int max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700130
131/*
132 * Open owner state (share locks)
133 */
134
135/* hash tables for nfs4_stateowner */
136#define OWNER_HASH_BITS 8
137#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
138#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
139
140#define ownerid_hashval(id) \
141 ((id) & OWNER_HASH_MASK)
142#define ownerstr_hashval(clientid, ownername) \
143 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
144
145static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
146static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
147
148/* hash table for nfs4_file */
149#define FILE_HASH_BITS 8
150#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
151#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
152/* hash table for (open)nfs4_stateid */
153#define STATEID_HASH_BITS 10
154#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
155#define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
156
157#define file_hashval(x) \
158 hash_ptr(x, FILE_HASH_BITS)
159#define stateid_hashval(owner_id, file_id) \
160 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
161
162static struct list_head file_hashtbl[FILE_HASH_SIZE];
163static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
164
J. Bruce Fields998db522010-08-07 09:21:41 -0400165static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400166{
167 BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
168 atomic_inc(&fp->fi_access[oflag]);
169}
170
J. Bruce Fields998db522010-08-07 09:21:41 -0400171static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
172{
173 if (oflag == O_RDWR) {
174 __nfs4_file_get_access(fp, O_RDONLY);
175 __nfs4_file_get_access(fp, O_WRONLY);
176 } else
177 __nfs4_file_get_access(fp, oflag);
178}
179
180static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400181{
182 if (fp->fi_fds[oflag]) {
183 fput(fp->fi_fds[oflag]);
184 fp->fi_fds[oflag] = NULL;
185 }
186}
187
J. Bruce Fields998db522010-08-07 09:21:41 -0400188static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400189{
190 if (atomic_dec_and_test(&fp->fi_access[oflag])) {
191 nfs4_file_put_fd(fp, O_RDWR);
192 nfs4_file_put_fd(fp, oflag);
193 }
194}
195
J. Bruce Fields998db522010-08-07 09:21:41 -0400196static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
197{
198 if (oflag == O_RDWR) {
199 __nfs4_file_put_access(fp, O_RDONLY);
200 __nfs4_file_put_access(fp, O_WRONLY);
201 } else
202 __nfs4_file_put_access(fp, oflag);
203}
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205static struct nfs4_delegation *
206alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
207{
208 struct nfs4_delegation *dp;
209 struct nfs4_file *fp = stp->st_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 dprintk("NFSD alloc_init_deleg\n");
J. Bruce Fieldsc3e48082010-07-28 10:08:57 -0400212 /*
213 * Major work on the lease subsystem (for example, to support
214 * calbacks on stat) will be required before we can support
215 * write delegations properly.
216 */
217 if (type != NFS4_OPEN_DELEGATE_READ)
218 return NULL;
Meelap Shah47f99402007-07-17 04:04:40 -0700219 if (fp->fi_had_conflict)
220 return NULL;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700221 if (num_delegations > max_delegations)
NeilBrownef0f3392006-04-10 22:55:41 -0700222 return NULL;
NeilBrown5b2d21c2005-06-23 22:03:04 -0700223 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
224 if (dp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 return dp;
NeilBrownef0f3392006-04-10 22:55:41 -0700226 num_delegations++;
NeilBrownea1da632005-06-23 22:04:17 -0700227 INIT_LIST_HEAD(&dp->dl_perfile);
228 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 INIT_LIST_HEAD(&dp->dl_recall_lru);
230 dp->dl_client = clp;
NeilBrown13cd2182005-06-23 22:03:10 -0700231 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 dp->dl_file = fp;
J. Bruce Fieldsc84d5002010-10-30 23:35:04 -0400233 dp->dl_vfs_file = find_readable_file(fp);
234 get_file(dp->dl_vfs_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 dp->dl_flock = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 dp->dl_type = type;
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -0400237 dp->dl_stateid.si_boot = boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 dp->dl_stateid.si_stateownerid = current_delegid++;
239 dp->dl_stateid.si_fileid = 0;
240 dp->dl_stateid.si_generation = 0;
J. Bruce Fields6c02eaa2009-02-02 17:30:51 -0500241 fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 dp->dl_time = 0;
243 atomic_set(&dp->dl_count, 1);
NeilBrownea1da632005-06-23 22:04:17 -0700244 list_add(&dp->dl_perfile, &fp->fi_delegations);
245 list_add(&dp->dl_perclnt, &clp->cl_delegations);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -0500246 INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 return dp;
248}
249
250void
251nfs4_put_delegation(struct nfs4_delegation *dp)
252{
253 if (atomic_dec_and_test(&dp->dl_count)) {
254 dprintk("NFSD: freeing dp %p\n",dp);
NeilBrown13cd2182005-06-23 22:03:10 -0700255 put_nfs4_file(dp->dl_file);
J. Bruce Fieldsc84d5002010-10-30 23:35:04 -0400256 fput(dp->dl_vfs_file);
NeilBrown5b2d21c2005-06-23 22:03:04 -0700257 kmem_cache_free(deleg_slab, dp);
NeilBrownef0f3392006-04-10 22:55:41 -0700258 num_delegations--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 }
260}
261
262/* Remove the associated file_lock first, then remove the delegation.
263 * lease_modify() is called to remove the FS_LEASE file_lock from
264 * the i_flock list, eventually calling nfsd's lock_manager
265 * fl_release_callback.
266 */
267static void
268nfs4_close_delegation(struct nfs4_delegation *dp)
269{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 dprintk("NFSD: close_delegation dp %p\n",dp);
J. Bruce Fieldsc84d5002010-10-30 23:35:04 -0400271 /* XXX: do we even need this check?: */
NeilBrownc9071322005-04-16 15:26:38 -0700272 if (dp->dl_flock)
J. Bruce Fieldsc84d5002010-10-30 23:35:04 -0400273 vfs_setlease(dp->dl_vfs_file, F_UNLCK, &dp->dl_flock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
276/* Called under the state lock. */
277static void
278unhash_delegation(struct nfs4_delegation *dp)
279{
NeilBrownea1da632005-06-23 22:04:17 -0700280 list_del_init(&dp->dl_perfile);
281 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 spin_lock(&recall_lock);
283 list_del_init(&dp->dl_recall_lru);
284 spin_unlock(&recall_lock);
285 nfs4_close_delegation(dp);
286 nfs4_put_delegation(dp);
287}
288
289/*
290 * SETCLIENTID state
291 */
292
Benny Halevy36acb662010-05-12 00:13:04 +0300293/* client_lock protects the client lru list and session hash table */
Benny Halevy9089f1b2010-05-12 00:12:26 +0300294static DEFINE_SPINLOCK(client_lock);
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296/* Hash tables for nfs4_clientid state */
297#define CLIENT_HASH_BITS 4
298#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
299#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
300
301#define clientid_hashval(id) \
302 ((id) & CLIENT_HASH_MASK)
NeilBrowna55370a2005-06-23 22:03:52 -0700303#define clientstr_hashval(name) \
304 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305/*
306 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
307 * used in reboot/reset lease grace period processing
308 *
309 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
310 * setclientid_confirmed info.
311 *
312 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
313 * setclientid info.
314 *
315 * client_lru holds client queue ordered by nfs4_client.cl_time
316 * for lease renewal.
317 *
318 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
319 * for last close replay.
320 */
321static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
322static int reclaim_str_hashtbl_size = 0;
323static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
324static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
325static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
326static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
327static struct list_head client_lru;
328static struct list_head close_lru;
329
J. Bruce Fields22839632009-01-11 14:27:17 -0500330static void unhash_generic_stateid(struct nfs4_stateid *stp)
331{
332 list_del(&stp->st_hash);
333 list_del(&stp->st_perfile);
334 list_del(&stp->st_perstateowner);
335}
336
337static void free_generic_stateid(struct nfs4_stateid *stp)
338{
339 put_nfs4_file(stp->st_file);
340 kmem_cache_free(stateid_slab, stp);
341}
342
343static void release_lock_stateid(struct nfs4_stateid *stp)
344{
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400345 struct file *file;
346
J. Bruce Fields22839632009-01-11 14:27:17 -0500347 unhash_generic_stateid(stp);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400348 file = find_any_file(stp->st_file);
349 if (file)
350 locks_remove_posix(file, (fl_owner_t)stp->st_stateowner);
J. Bruce Fields22839632009-01-11 14:27:17 -0500351 free_generic_stateid(stp);
352}
353
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500354static void unhash_lockowner(struct nfs4_stateowner *sop)
355{
356 struct nfs4_stateid *stp;
357
358 list_del(&sop->so_idhash);
359 list_del(&sop->so_strhash);
360 list_del(&sop->so_perstateid);
361 while (!list_empty(&sop->so_stateids)) {
362 stp = list_first_entry(&sop->so_stateids,
363 struct nfs4_stateid, st_perstateowner);
364 release_lock_stateid(stp);
365 }
366}
367
368static void release_lockowner(struct nfs4_stateowner *sop)
369{
370 unhash_lockowner(sop);
371 nfs4_put_stateowner(sop);
372}
373
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500374static void
375release_stateid_lockowners(struct nfs4_stateid *open_stp)
376{
377 struct nfs4_stateowner *lock_sop;
378
379 while (!list_empty(&open_stp->st_lockowners)) {
380 lock_sop = list_entry(open_stp->st_lockowners.next,
381 struct nfs4_stateowner, so_perstateid);
382 /* list_del(&open_stp->st_lockowners); */
383 BUG_ON(lock_sop->so_is_open_owner);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500384 release_lockowner(lock_sop);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500385 }
386}
387
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400388/*
389 * We store the NONE, READ, WRITE, and BOTH bits separately in the
390 * st_{access,deny}_bmap field of the stateid, in order to track not
391 * only what share bits are currently in force, but also what
392 * combinations of share bits previous opens have used. This allows us
393 * to enforce the recommendation of rfc 3530 14.2.19 that the server
394 * return an error if the client attempt to downgrade to a combination
395 * of share bits not explicable by closing some of its previous opens.
396 *
397 * XXX: This enforcement is actually incomplete, since we don't keep
398 * track of access/deny bit combinations; so, e.g., we allow:
399 *
400 * OPEN allow read, deny write
401 * OPEN allow both, deny none
402 * DOWNGRADE allow read, deny none
403 *
404 * which we should reject.
405 */
406static void
407set_access(unsigned int *access, unsigned long bmap) {
408 int i;
409
410 *access = 0;
411 for (i = 1; i < 4; i++) {
412 if (test_bit(i, &bmap))
413 *access |= i;
414 }
415}
416
417static void
418set_deny(unsigned int *deny, unsigned long bmap) {
419 int i;
420
421 *deny = 0;
422 for (i = 0; i < 4; i++) {
423 if (test_bit(i, &bmap))
424 *deny |= i ;
425 }
426}
427
428static int
429test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
430 unsigned int access, deny;
431
432 set_access(&access, stp->st_access_bmap);
433 set_deny(&deny, stp->st_deny_bmap);
434 if ((access & open->op_share_deny) || (deny & open->op_share_access))
435 return 0;
436 return 1;
437}
438
439static int nfs4_access_to_omode(u32 access)
440{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400441 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400442 case NFS4_SHARE_ACCESS_READ:
443 return O_RDONLY;
444 case NFS4_SHARE_ACCESS_WRITE:
445 return O_WRONLY;
446 case NFS4_SHARE_ACCESS_BOTH:
447 return O_RDWR;
448 }
449 BUG();
450}
451
452static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp)
453{
454 unsigned int access;
455
456 set_access(&access, stp->st_access_bmap);
457 return nfs4_access_to_omode(access);
458}
459
J. Bruce Fields22839632009-01-11 14:27:17 -0500460static void release_open_stateid(struct nfs4_stateid *stp)
461{
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400462 int oflag = nfs4_access_bmap_to_omode(stp);
463
J. Bruce Fields22839632009-01-11 14:27:17 -0500464 unhash_generic_stateid(stp);
465 release_stateid_lockowners(stp);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400466 nfs4_file_put_access(stp->st_file, oflag);
J. Bruce Fields22839632009-01-11 14:27:17 -0500467 free_generic_stateid(stp);
468}
469
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500470static void unhash_openowner(struct nfs4_stateowner *sop)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500471{
472 struct nfs4_stateid *stp;
473
474 list_del(&sop->so_idhash);
475 list_del(&sop->so_strhash);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500476 list_del(&sop->so_perclient);
477 list_del(&sop->so_perstateid); /* XXX: necessary? */
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500478 while (!list_empty(&sop->so_stateids)) {
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500479 stp = list_first_entry(&sop->so_stateids,
480 struct nfs4_stateid, st_perstateowner);
481 release_open_stateid(stp);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500482 }
483}
484
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500485static void release_openowner(struct nfs4_stateowner *sop)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500486{
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500487 unhash_openowner(sop);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500488 list_del(&sop->so_close_lru);
489 nfs4_put_stateowner(sop);
490}
491
Marc Eshel5282fd72009-04-03 08:27:52 +0300492#define SESSION_HASH_SIZE 512
493static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
494
495static inline int
496hash_sessionid(struct nfs4_sessionid *sessionid)
497{
498 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
499
500 return sid->sequence % SESSION_HASH_SIZE;
501}
502
503static inline void
504dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
505{
506 u32 *ptr = (u32 *)(&sessionid->data[0]);
507 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
508}
509
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300510static void
511gen_sessionid(struct nfsd4_session *ses)
512{
513 struct nfs4_client *clp = ses->se_client;
514 struct nfsd4_sessionid *sid;
515
516 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
517 sid->clientid = clp->cl_clientid;
518 sid->sequence = current_sessionid++;
519 sid->reserved = 0;
520}
521
522/*
Andy Adamsona6496372009-08-28 08:45:01 -0400523 * The protocol defines ca_maxresponssize_cached to include the size of
524 * the rpc header, but all we need to cache is the data starting after
525 * the end of the initial SEQUENCE operation--the rest we regenerate
526 * each time. Therefore we can advertise a ca_maxresponssize_cached
527 * value that is the number of bytes in our cache plus a few additional
528 * bytes. In order to stay on the safe side, and not promise more than
529 * we can cache, those additional bytes must be the minimum possible: 24
530 * bytes of rpc header (xid through accept state, with AUTH_NULL
531 * verifier), 12 for the compound header (with zero-length tag), and 44
532 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300533 */
Andy Adamsona6496372009-08-28 08:45:01 -0400534#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
535
Andy Adamson557ce262009-08-28 08:45:04 -0400536static void
537free_session_slots(struct nfsd4_session *ses)
538{
539 int i;
540
541 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
542 kfree(ses->se_slots[i]);
543}
544
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400545/*
546 * We don't actually need to cache the rpc and session headers, so we
547 * can allocate a little less for each slot:
548 */
549static inline int slot_bytes(struct nfsd4_channel_attrs *ca)
550{
551 return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
552}
553
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400554static int nfsd4_sanitize_slot_size(u32 size)
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300555{
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400556 size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */
557 size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300558
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400559 return size;
560}
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300561
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400562/*
563 * XXX: If we run out of reserved DRC memory we could (up to a point)
564 * re-negotiate active sessions and reduce their slot usage to make
565 * rooom for new connections. For now we just fail the create session.
566 */
567static int nfsd4_get_drc_mem(int slotsize, u32 num)
568{
569 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300570
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400571 num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION);
Andy Adamson557ce262009-08-28 08:45:04 -0400572
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400573 spin_lock(&nfsd_drc_lock);
574 avail = min_t(int, NFSD_MAX_MEM_PER_SESSION,
575 nfsd_drc_max_mem - nfsd_drc_mem_used);
576 num = min_t(int, num, avail / slotsize);
577 nfsd_drc_mem_used += num * slotsize;
578 spin_unlock(&nfsd_drc_lock);
579
580 return num;
581}
582
583static void nfsd4_put_drc_mem(int slotsize, int num)
584{
585 spin_lock(&nfsd_drc_lock);
586 nfsd_drc_mem_used -= slotsize * num;
587 spin_unlock(&nfsd_drc_lock);
588}
589
590static struct nfsd4_session *alloc_session(int slotsize, int numslots)
591{
592 struct nfsd4_session *new;
593 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300594
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -0400595 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400596 + sizeof(struct nfsd4_session) > PAGE_SIZE);
597 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -0400598
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400599 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300600 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400601 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -0400602 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400603 for (i = 0; i < numslots; i++) {
604 mem = sizeof(struct nfsd4_slot) + slotsize;
605 new->se_slots[i] = kzalloc(mem, GFP_KERNEL);
606 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -0400607 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -0400608 }
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400609 return new;
610out_free:
611 while (i--)
612 kfree(new->se_slots[i]);
613 kfree(new);
614 return NULL;
615}
616
617static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize)
618{
619 u32 maxrpc = nfsd_serv->sv_max_mesg;
620
621 new->maxreqs = numslots;
622 new->maxresp_cached = slotsize + NFSD_MIN_HDR_SEQ_SZ;
623 new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc);
624 new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc);
625 new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND);
626}
627
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400628static void free_conn(struct nfsd4_conn *c)
629{
630 svc_xprt_put(c->cn_xprt);
631 kfree(c);
632}
633
634static void nfsd4_conn_lost(struct svc_xpt_user *u)
635{
636 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
637 struct nfs4_client *clp = c->cn_session->se_client;
638
639 spin_lock(&clp->cl_lock);
640 if (!list_empty(&c->cn_persession)) {
641 list_del(&c->cn_persession);
642 free_conn(c);
643 }
644 spin_unlock(&clp->cl_lock);
J. Bruce Fieldseea49802010-11-18 08:34:12 -0500645 nfsd4_probe_callback(clp);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400646}
647
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400648static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400649{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400650 struct nfsd4_conn *conn;
651
652 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
653 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400654 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400655 svc_xprt_get(rqstp->rq_xprt);
656 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400657 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400658 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
659 return conn;
660}
661
J. Bruce Fields328ead22010-09-29 16:11:06 -0400662static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
663{
664 conn->cn_session = ses;
665 list_add(&conn->cn_persession, &ses->se_conns);
666}
667
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400668static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
669{
670 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400671
672 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -0400673 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400674 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400675}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400676
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400677static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400678{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400679 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400680 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400681}
682
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400683static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400684{
685 struct nfsd4_conn *conn;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400686 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400687
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400688 conn = alloc_conn(rqstp, dir);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400689 if (!conn)
690 return nfserr_jukebox;
691 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400692 ret = nfsd4_register_conn(conn);
693 if (ret)
694 /* oops; xprt is already down: */
695 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400696 return nfs_ok;
697}
698
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400699static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses)
700{
701 u32 dir = NFS4_CDFC4_FORE;
702
703 if (ses->se_flags & SESSION4_BACK_CHAN)
704 dir |= NFS4_CDFC4_BACK;
705
706 return nfsd4_new_conn(rqstp, ses, dir);
707}
708
709/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400710static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400711{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400712 struct nfs4_client *clp = s->se_client;
713 struct nfsd4_conn *c;
714
715 spin_lock(&clp->cl_lock);
716 while (!list_empty(&s->se_conns)) {
717 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
718 list_del_init(&c->cn_persession);
719 spin_unlock(&clp->cl_lock);
720
721 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
722 free_conn(c);
723
724 spin_lock(&clp->cl_lock);
725 }
726 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400727}
728
729void free_session(struct kref *kref)
730{
731 struct nfsd4_session *ses;
732 int mem;
733
734 ses = container_of(kref, struct nfsd4_session, se_ref);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400735 nfsd4_del_conns(ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400736 spin_lock(&nfsd_drc_lock);
737 mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel);
738 nfsd_drc_mem_used -= mem;
739 spin_unlock(&nfsd_drc_lock);
740 free_session_slots(ses);
741 kfree(ses);
742}
743
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400744static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400745{
746 struct nfsd4_session *new;
747 struct nfsd4_channel_attrs *fchan = &cses->fore_channel;
748 int numslots, slotsize;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400749 int status;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400750 int idx;
751
752 /*
753 * Note decreasing slot size below client's request may
754 * make it difficult for client to function correctly, whereas
755 * decreasing the number of slots will (just?) affect
756 * performance. When short on memory we therefore prefer to
757 * decrease number of slots instead of their size.
758 */
759 slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached);
760 numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs);
Mi Jinlongced6dfe2010-11-11 18:03:50 +0800761 if (numslots < 1)
762 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400763
764 new = alloc_session(slotsize, numslots);
765 if (!new) {
766 nfsd4_put_drc_mem(slotsize, fchan->maxreqs);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400767 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400768 }
769 init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize);
Andy Adamson557ce262009-08-28 08:45:04 -0400770
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300771 new->se_client = clp;
772 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300773
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400774 INIT_LIST_HEAD(&new->se_conns);
775
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400776 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300777 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -0400778 new->se_cb_prog = cses->callback_prog;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300779 kref_init(&new->se_ref);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400780 idx = hash_sessionid(&new->se_sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300781 spin_lock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300782 list_add(&new->se_hash, &sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400783 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300784 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400785 spin_unlock(&clp->cl_lock);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300786 spin_unlock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300787
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400788 status = nfsd4_new_conn_from_crses(rqstp, new);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400789 /* whoops: benny points out, status is ignored! (err, or bogus) */
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400790 if (status) {
791 free_session(&new->se_ref);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400792 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400793 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400794 if (cses->flags & SESSION4_BACK_CHAN) {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400795 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400796 /*
797 * This is a little silly; with sessions there's no real
798 * use for the callback address. Use the peer address
799 * as a reasonable default for now, but consider fixing
800 * the rpc client not to require an address in the
801 * future:
802 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400803 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
804 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400805 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400806 nfsd4_probe_callback(clp);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400807 return new;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300808}
809
Benny Halevy9089f1b2010-05-12 00:12:26 +0300810/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +0300811static struct nfsd4_session *
812find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
813{
814 struct nfsd4_session *elem;
815 int idx;
816
817 dump_sessionid(__func__, sessionid);
818 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +0300819 /* Search in the appropriate list */
820 list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +0300821 if (!memcmp(elem->se_sessionid.data, sessionid->data,
822 NFS4_MAX_SESSIONID_LEN)) {
823 return elem;
824 }
825 }
826
827 dprintk("%s: session not found\n", __func__);
828 return NULL;
829}
830
Benny Halevy9089f1b2010-05-12 00:12:26 +0300831/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +0300832static void
Marc Eshel5282fd72009-04-03 08:27:52 +0300833unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +0300834{
835 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400836 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +0300837 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400838 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +0300839}
840
Benny Halevy36acb662010-05-12 00:13:04 +0300841/* must be called under the client_lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842static inline void
Benny Halevy36acb662010-05-12 00:13:04 +0300843renew_client_locked(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Benny Halevy07cd4902010-05-12 00:13:41 +0300845 if (is_client_expired(clp)) {
846 dprintk("%s: client (clientid %08x/%08x) already expired\n",
847 __func__,
848 clp->cl_clientid.cl_boot,
849 clp->cl_clientid.cl_id);
850 return;
851 }
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 /*
854 * Move client to the end to the LRU list.
855 */
856 dprintk("renewing client (clientid %08x/%08x)\n",
857 clp->cl_clientid.cl_boot,
858 clp->cl_clientid.cl_id);
859 list_move_tail(&clp->cl_lru, &client_lru);
860 clp->cl_time = get_seconds();
861}
862
Benny Halevy36acb662010-05-12 00:13:04 +0300863static inline void
864renew_client(struct nfs4_client *clp)
865{
866 spin_lock(&client_lock);
867 renew_client_locked(clp);
868 spin_unlock(&client_lock);
869}
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
872static int
873STALE_CLIENTID(clientid_t *clid)
874{
875 if (clid->cl_boot == boot_time)
876 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +0300877 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
878 clid->cl_boot, clid->cl_id, boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 return 1;
880}
881
882/*
883 * XXX Should we use a slab cache ?
884 * This type of memory management is somewhat inefficient, but we use it
885 * anyway since SETCLIENTID is not a common operation.
886 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500887static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888{
889 struct nfs4_client *clp;
890
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500891 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
892 if (clp == NULL)
893 return NULL;
894 clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
895 if (clp->cl_name.data == NULL) {
896 kfree(clp);
897 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 }
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500899 memcpy(clp->cl_name.data, name.data, name.len);
900 clp->cl_name.len = name.len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 return clp;
902}
903
904static inline void
905free_client(struct nfs4_client *clp)
906{
J. Bruce Fields792c95d2010-10-12 19:55:25 -0400907 while (!list_empty(&clp->cl_sessions)) {
908 struct nfsd4_session *ses;
909 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
910 se_perclnt);
911 list_del(&ses->se_perclnt);
912 nfsd4_put_session(ses);
913 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 if (clp->cl_cred.cr_group_info)
915 put_group_info(clp->cl_cred.cr_group_info);
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -0500916 kfree(clp->cl_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 kfree(clp->cl_name.data);
918 kfree(clp);
919}
920
Benny Halevyd7682982010-05-12 00:13:54 +0300921void
922release_session_client(struct nfsd4_session *session)
923{
924 struct nfs4_client *clp = session->se_client;
925
926 if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock))
927 return;
928 if (is_client_expired(clp)) {
929 free_client(clp);
930 session->se_client = NULL;
931 } else
932 renew_client_locked(clp);
933 spin_unlock(&client_lock);
Benny Halevyd7682982010-05-12 00:13:54 +0300934}
935
Benny Halevy84d38ac2010-05-12 00:13:16 +0300936/* must be called under the client_lock */
937static inline void
938unhash_client_locked(struct nfs4_client *clp)
939{
J. Bruce Fields792c95d2010-10-12 19:55:25 -0400940 struct nfsd4_session *ses;
941
Benny Halevy07cd4902010-05-12 00:13:41 +0300942 mark_client_expired(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +0300943 list_del(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400944 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -0400945 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
946 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400947 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +0300948}
949
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950static void
951expire_client(struct nfs4_client *clp)
952{
953 struct nfs4_stateowner *sop;
954 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 struct list_head reaplist;
956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 INIT_LIST_HEAD(&reaplist);
958 spin_lock(&recall_lock);
NeilBrownea1da632005-06-23 22:04:17 -0700959 while (!list_empty(&clp->cl_delegations)) {
960 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
962 dp->dl_flock);
NeilBrownea1da632005-06-23 22:04:17 -0700963 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 list_move(&dp->dl_recall_lru, &reaplist);
965 }
966 spin_unlock(&recall_lock);
967 while (!list_empty(&reaplist)) {
968 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
969 list_del_init(&dp->dl_recall_lru);
970 unhash_delegation(dp);
971 }
NeilBrownea1da632005-06-23 22:04:17 -0700972 while (!list_empty(&clp->cl_openowners)) {
973 sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500974 release_openowner(sop);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 }
J. Bruce Fields6ff8da02010-06-04 20:04:45 -0400976 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -0500977 if (clp->cl_cb_conn.cb_xprt)
978 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
Benny Halevy84d38ac2010-05-12 00:13:16 +0300979 list_del(&clp->cl_idhash);
980 list_del(&clp->cl_strhash);
981 spin_lock(&client_lock);
982 unhash_client_locked(clp);
Benny Halevy46583e22010-05-12 00:13:29 +0300983 if (atomic_read(&clp->cl_refcount) == 0)
984 free_client(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +0300985 spin_unlock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986}
987
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500988static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
989{
990 memcpy(target->cl_verifier.data, source->data,
991 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992}
993
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500994static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
995{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
997 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
998}
999
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001000static void copy_cred(struct svc_cred *target, struct svc_cred *source)
1001{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 target->cr_uid = source->cr_uid;
1003 target->cr_gid = source->cr_gid;
1004 target->cr_group_info = source->cr_group_info;
1005 get_group_info(target->cr_group_info);
1006}
1007
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001008static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001009{
NeilBrowna55370a2005-06-23 22:03:52 -07001010 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011}
1012
1013static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001014same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1015{
1016 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017}
1018
1019static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001020same_clid(clientid_t *cl1, clientid_t *cl2)
1021{
1022 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023}
1024
1025/* XXX what about NGROUP */
1026static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001027same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1028{
1029 return cr1->cr_uid == cr2->cr_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030}
1031
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001032static void gen_clid(struct nfs4_client *clp)
1033{
1034 static u32 current_clientid = 1;
1035
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 clp->cl_clientid.cl_boot = boot_time;
1037 clp->cl_clientid.cl_id = current_clientid++;
1038}
1039
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001040static void gen_confirm(struct nfs4_client *clp)
1041{
1042 static u32 i;
1043 u32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 p = (u32 *)clp->cl_confirm.data;
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001046 *p++ = get_seconds();
1047 *p++ = i++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001050static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
1051 struct svc_rqst *rqstp, nfs4_verifier *verf)
1052{
1053 struct nfs4_client *clp;
1054 struct sockaddr *sa = svc_addr(rqstp);
1055 char *princ;
1056
1057 clp = alloc_client(name);
1058 if (clp == NULL)
1059 return NULL;
1060
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001061 INIT_LIST_HEAD(&clp->cl_sessions);
1062
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001063 princ = svc_gss_principal(rqstp);
1064 if (princ) {
1065 clp->cl_principal = kstrdup(princ, GFP_KERNEL);
1066 if (clp->cl_principal == NULL) {
1067 free_client(clp);
1068 return NULL;
1069 }
1070 }
1071
1072 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
Benny Halevy46583e22010-05-12 00:13:29 +03001073 atomic_set(&clp->cl_refcount, 0);
J. Bruce Fields77a35692010-04-30 18:51:44 -04001074 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001075 INIT_LIST_HEAD(&clp->cl_idhash);
1076 INIT_LIST_HEAD(&clp->cl_strhash);
1077 INIT_LIST_HEAD(&clp->cl_openowners);
1078 INIT_LIST_HEAD(&clp->cl_delegations);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001079 INIT_LIST_HEAD(&clp->cl_lru);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001080 spin_lock_init(&clp->cl_lock);
J. Bruce Fieldscee277d2010-05-26 17:52:14 -04001081 INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc);
Benny Halevy07cd4902010-05-12 00:13:41 +03001082 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001083 clear_bit(0, &clp->cl_cb_slot_busy);
1084 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1085 copy_verf(clp, verf);
1086 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
1087 clp->cl_flavor = rqstp->rq_flavor;
1088 copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1089 gen_confirm(clp);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001090 clp->cl_cb_session = NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001091 return clp;
1092}
1093
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001094static int check_name(struct xdr_netobj name)
1095{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 if (name.len == 0)
1097 return 0;
1098 if (name.len > NFS4_OPAQUE_LIMIT) {
J. Bruce Fields2fdada02007-07-27 16:10:37 -04001099 dprintk("NFSD: check_name: name too long(%d)!\n", name.len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 return 0;
1101 }
1102 return 1;
1103}
1104
NeilBrownfd39ca92005-06-23 22:04:03 -07001105static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
1107{
1108 unsigned int idhashval;
1109
1110 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
1111 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1112 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
Benny Halevy36acb662010-05-12 00:13:04 +03001113 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114}
1115
NeilBrownfd39ca92005-06-23 22:04:03 -07001116static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117move_to_confirmed(struct nfs4_client *clp)
1118{
1119 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1120 unsigned int strhashval;
1121
1122 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Akinobu Mitaf1166292006-06-26 00:24:46 -07001123 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07001124 strhashval = clientstr_hashval(clp->cl_recdir);
Benny Halevy328efba2010-05-12 00:12:51 +03001125 list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 renew_client(clp);
1127}
1128
1129static struct nfs4_client *
1130find_confirmed_client(clientid_t *clid)
1131{
1132 struct nfs4_client *clp;
1133 unsigned int idhashval = clientid_hashval(clid->cl_id);
1134
1135 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001136 if (same_clid(&clp->cl_clientid, clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 return clp;
1138 }
1139 return NULL;
1140}
1141
1142static struct nfs4_client *
1143find_unconfirmed_client(clientid_t *clid)
1144{
1145 struct nfs4_client *clp;
1146 unsigned int idhashval = clientid_hashval(clid->cl_id);
1147
1148 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001149 if (same_clid(&clp->cl_clientid, clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 return clp;
1151 }
1152 return NULL;
1153}
1154
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001155static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001156{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001157 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001158}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001159
NeilBrown28ce6052005-06-23 22:03:56 -07001160static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001161find_confirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001162{
1163 struct nfs4_client *clp;
1164
1165 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001166 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001167 return clp;
1168 }
1169 return NULL;
1170}
1171
1172static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001173find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001174{
1175 struct nfs4_client *clp;
1176
1177 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001178 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001179 return clp;
1180 }
1181 return NULL;
1182}
1183
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001184static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr)
1185{
1186 switch (family) {
1187 case AF_INET:
1188 ((struct sockaddr_in *)sa)->sin_family = AF_INET;
1189 ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr;
1190 return;
1191 case AF_INET6:
1192 ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6;
1193 ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6;
1194 return;
1195 }
1196}
1197
NeilBrownfd39ca92005-06-23 22:04:03 -07001198static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001199gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200{
J. Bruce Fields07263f12010-05-31 19:09:40 -04001201 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001202 struct sockaddr *sa = svc_addr(rqstp);
1203 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04001204 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Jeff Layton7077ecb2009-08-14 12:57:58 -04001206 /* Currently, we only support tcp and tcp6 for the callback channel */
1207 if (se->se_callback_netid_len == 3 &&
1208 !memcmp(se->se_callback_netid_val, "tcp", 3))
1209 expected_family = AF_INET;
1210 else if (se->se_callback_netid_len == 4 &&
1211 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1212 expected_family = AF_INET6;
1213 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 goto out_err;
1215
J. Bruce Fields07263f12010-05-31 19:09:40 -04001216 conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001217 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04001218 (struct sockaddr *)&conn->cb_addr,
1219 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001220
J. Bruce Fields07263f12010-05-31 19:09:40 -04001221 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001223
J. Bruce Fields07263f12010-05-31 19:09:40 -04001224 if (conn->cb_addr.ss_family == AF_INET6)
1225 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04001226
J. Bruce Fields07263f12010-05-31 19:09:40 -04001227 conn->cb_prog = se->se_callback_prog;
1228 conn->cb_ident = se->se_callback_ident;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001229 rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 return;
1231out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04001232 conn->cb_addr.ss_family = AF_UNSPEC;
1233 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07001234 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 "will not receive delegations\n",
1236 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1237
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 return;
1239}
1240
Andy Adamson074fe892009-04-03 08:28:15 +03001241/*
Andy Adamson557ce262009-08-28 08:45:04 -04001242 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03001243 */
1244void
1245nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1246{
Andy Adamson557ce262009-08-28 08:45:04 -04001247 struct nfsd4_slot *slot = resp->cstate.slot;
1248 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03001249
Andy Adamson557ce262009-08-28 08:45:04 -04001250 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001251
Andy Adamson557ce262009-08-28 08:45:04 -04001252 slot->sl_opcnt = resp->opcnt;
1253 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001254
1255 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04001256 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001257 return;
1258 }
Andy Adamson557ce262009-08-28 08:45:04 -04001259 slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap;
1260 base = (char *)resp->cstate.datap -
1261 (char *)resp->xbuf->head[0].iov_base;
1262 if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data,
1263 slot->sl_datalen))
1264 WARN("%s: sessions DRC could not cache compound\n", __func__);
1265 return;
Andy Adamson074fe892009-04-03 08:28:15 +03001266}
1267
1268/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04001269 * Encode the replay sequence operation from the slot values.
1270 * If cachethis is FALSE encode the uncached rep error on the next
1271 * operation which sets resp->p and increments resp->opcnt for
1272 * nfs4svc_encode_compoundres.
1273 *
Andy Adamson074fe892009-04-03 08:28:15 +03001274 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04001275static __be32
1276nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1277 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03001278{
Andy Adamsonabfabf82009-07-23 19:02:18 -04001279 struct nfsd4_op *op;
1280 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001281
Andy Adamsonabfabf82009-07-23 19:02:18 -04001282 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__,
Andy Adamson557ce262009-08-28 08:45:04 -04001283 resp->opcnt, resp->cstate.slot->sl_cachethis);
Andy Adamsonabfabf82009-07-23 19:02:18 -04001284
1285 /* Encode the replayed sequence operation */
1286 op = &args->ops[resp->opcnt - 1];
1287 nfsd4_encode_operation(resp, op);
1288
1289 /* Return nfserr_retry_uncached_rep in next operation. */
Andy Adamson557ce262009-08-28 08:45:04 -04001290 if (args->opcnt > 1 && slot->sl_cachethis == 0) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04001291 op = &args->ops[resp->opcnt++];
1292 op->status = nfserr_retry_uncached_rep;
1293 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03001294 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04001295 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03001296}
1297
1298/*
Andy Adamson557ce262009-08-28 08:45:04 -04001299 * The sequence operation is not cached because we can use the slot and
1300 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03001301 */
1302__be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03001303nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1304 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03001305{
Andy Adamson557ce262009-08-28 08:45:04 -04001306 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001307 __be32 status;
1308
Andy Adamson557ce262009-08-28 08:45:04 -04001309 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001310
Andy Adamsonabfabf82009-07-23 19:02:18 -04001311 /* Either returns 0 or nfserr_retry_uncached */
1312 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1313 if (status == nfserr_retry_uncached_rep)
1314 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03001315
Andy Adamson557ce262009-08-28 08:45:04 -04001316 /* The sequence operation has been encoded, cstate->datap set. */
1317 memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen);
Andy Adamson074fe892009-04-03 08:28:15 +03001318
Andy Adamson557ce262009-08-28 08:45:04 -04001319 resp->opcnt = slot->sl_opcnt;
1320 resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen);
1321 status = slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03001322
1323 return status;
1324}
1325
Andy Adamson0733d212009-04-03 08:28:01 +03001326/*
1327 * Set the exchange_id flags returned by the server.
1328 */
1329static void
1330nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1331{
1332 /* pNFS is not supported */
1333 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1334
1335 /* Referrals are supported, Migration is not. */
1336 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1337
1338 /* set the wire flags to return to client. */
1339 clid->flags = new->cl_exchange_flags;
1340}
1341
Al Virob37ad282006-10-19 23:28:59 -07001342__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03001343nfsd4_exchange_id(struct svc_rqst *rqstp,
1344 struct nfsd4_compound_state *cstate,
1345 struct nfsd4_exchange_id *exid)
1346{
Andy Adamson0733d212009-04-03 08:28:01 +03001347 struct nfs4_client *unconf, *conf, *new;
1348 int status;
1349 unsigned int strhashval;
1350 char dname[HEXDIR_LEN];
Jeff Layton363168b2009-08-14 12:57:56 -04001351 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03001352 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04001353 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamson0733d212009-04-03 08:28:01 +03001354
Jeff Layton363168b2009-08-14 12:57:56 -04001355 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03001356 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04001357 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03001358 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04001359 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03001360
1361 if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A))
1362 return nfserr_inval;
1363
1364 /* Currently only support SP4_NONE */
1365 switch (exid->spa_how) {
1366 case SP4_NONE:
1367 break;
1368 case SP4_SSV:
J. Bruce Fields044bc1d2010-11-12 14:36:06 -05001369 return nfserr_serverfault;
Andy Adamson0733d212009-04-03 08:28:01 +03001370 default:
1371 BUG(); /* checked by xdr code */
1372 case SP4_MACH_CRED:
1373 return nfserr_serverfault; /* no excuse :-/ */
1374 }
1375
1376 status = nfs4_make_rec_clidname(dname, &exid->clname);
1377
1378 if (status)
1379 goto error;
1380
1381 strhashval = clientstr_hashval(dname);
1382
1383 nfs4_lock_state();
1384 status = nfs_ok;
1385
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001386 conf = find_confirmed_client_by_str(dname, strhashval);
Andy Adamson0733d212009-04-03 08:28:01 +03001387 if (conf) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001388 if (!clp_used_exchangeid(conf)) {
1389 status = nfserr_clid_inuse; /* XXX: ? */
1390 goto out;
1391 }
Andy Adamson0733d212009-04-03 08:28:01 +03001392 if (!same_verf(&verf, &conf->cl_verifier)) {
1393 /* 18.35.4 case 8 */
1394 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1395 status = nfserr_not_same;
1396 goto out;
1397 }
1398 /* Client reboot: destroy old state */
1399 expire_client(conf);
1400 goto out_new;
1401 }
1402 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
1403 /* 18.35.4 case 9 */
1404 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1405 status = nfserr_perm;
1406 goto out;
1407 }
1408 expire_client(conf);
1409 goto out_new;
1410 }
Andy Adamson0733d212009-04-03 08:28:01 +03001411 /*
1412 * Set bit when the owner id and verifier map to an already
1413 * confirmed client id (18.35.3).
1414 */
1415 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1416
1417 /*
1418 * Falling into 18.35.4 case 2, possible router replay.
1419 * Leave confirmed record intact and return same result.
1420 */
1421 copy_verf(conf, &verf);
1422 new = conf;
1423 goto out_copy;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001424 }
1425
1426 /* 18.35.4 case 7 */
1427 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1428 status = nfserr_noent;
1429 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001430 }
1431
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001432 unconf = find_unconfirmed_client_by_str(dname, strhashval);
Andy Adamson0733d212009-04-03 08:28:01 +03001433 if (unconf) {
1434 /*
1435 * Possible retry or client restart. Per 18.35.4 case 4,
1436 * a new unconfirmed record should be generated regardless
1437 * of whether any properties have changed.
1438 */
1439 expire_client(unconf);
1440 }
1441
1442out_new:
1443 /* Normal case */
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001444 new = create_client(exid->clname, dname, rqstp, &verf);
Andy Adamson0733d212009-04-03 08:28:01 +03001445 if (new == NULL) {
J. Bruce Fields47310302010-06-22 16:17:12 -04001446 status = nfserr_jukebox;
Andy Adamson0733d212009-04-03 08:28:01 +03001447 goto out;
1448 }
1449
Andy Adamson0733d212009-04-03 08:28:01 +03001450 gen_clid(new);
Andy Adamson0733d212009-04-03 08:28:01 +03001451 add_to_unconfirmed(new, strhashval);
1452out_copy:
1453 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1454 exid->clientid.cl_id = new->cl_clientid.cl_id;
1455
Andy Adamson38eb76a2009-04-03 08:28:32 +03001456 exid->seqid = 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001457 nfsd4_set_ex_flags(new, exid);
1458
1459 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001460 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03001461 status = nfs_ok;
1462
1463out:
1464 nfs4_unlock_state();
1465error:
1466 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status));
1467 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001468}
1469
Benny Halevyb85d4c02009-04-03 08:28:08 +03001470static int
Andy Adamson88e588d2009-07-23 19:02:15 -04001471check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001472{
Andy Adamson88e588d2009-07-23 19:02:15 -04001473 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1474 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001475
1476 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04001477 if (slot_inuse) {
1478 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001479 return nfserr_jukebox;
1480 else
1481 return nfserr_seq_misordered;
1482 }
1483 /* Normal */
Andy Adamson88e588d2009-07-23 19:02:15 -04001484 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03001485 return nfs_ok;
1486 /* Replay */
Andy Adamson88e588d2009-07-23 19:02:15 -04001487 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001488 return nfserr_replay_cache;
1489 /* Wraparound */
Andy Adamson88e588d2009-07-23 19:02:15 -04001490 if (seqid == 1 && (slot_seqid + 1) == 0)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001491 return nfs_ok;
1492 /* Misordered replay or misordered new request */
1493 return nfserr_seq_misordered;
1494}
1495
Andy Adamson49557cc2009-07-23 19:02:16 -04001496/*
1497 * Cache the create session result into the create session single DRC
1498 * slot cache by saving the xdr structure. sl_seqid has been set.
1499 * Do this for solo or embedded create session operations.
1500 */
1501static void
1502nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
1503 struct nfsd4_clid_slot *slot, int nfserr)
1504{
1505 slot->sl_status = nfserr;
1506 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1507}
1508
1509static __be32
1510nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1511 struct nfsd4_clid_slot *slot)
1512{
1513 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1514 return slot->sl_status;
1515}
1516
Andy Adamson069b6ad2009-04-03 08:27:58 +03001517__be32
1518nfsd4_create_session(struct svc_rqst *rqstp,
1519 struct nfsd4_compound_state *cstate,
1520 struct nfsd4_create_session *cr_ses)
1521{
Jeff Layton363168b2009-08-14 12:57:56 -04001522 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001523 struct nfs4_client *conf, *unconf;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001524 struct nfsd4_session *new;
Andy Adamson49557cc2009-07-23 19:02:16 -04001525 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001526 bool confirm_me = false;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001527 int status = 0;
1528
1529 nfs4_lock_state();
1530 unconf = find_unconfirmed_client(&cr_ses->clientid);
1531 conf = find_confirmed_client(&cr_ses->clientid);
1532
1533 if (conf) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001534 cs_slot = &conf->cl_cs_slot;
1535 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001536 if (status == nfserr_replay_cache) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001537 dprintk("Got a create_session replay! seqid= %d\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001538 cs_slot->sl_seqid);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001539 /* Return the cached reply status */
Andy Adamson49557cc2009-07-23 19:02:16 -04001540 status = nfsd4_replay_create_session(cr_ses, cs_slot);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001541 goto out;
Andy Adamson49557cc2009-07-23 19:02:16 -04001542 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001543 status = nfserr_seq_misordered;
1544 dprintk("Sequence misordered!\n");
1545 dprintk("Expected seqid= %d but got seqid= %d\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001546 cs_slot->sl_seqid, cr_ses->seqid);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001547 goto out;
1548 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001549 } else if (unconf) {
1550 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04001551 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001552 status = nfserr_clid_inuse;
1553 goto out;
1554 }
1555
Andy Adamson49557cc2009-07-23 19:02:16 -04001556 cs_slot = &unconf->cl_cs_slot;
1557 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001558 if (status) {
1559 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001560 status = nfserr_seq_misordered;
J. Bruce Fieldscd5b8142010-10-02 17:03:35 -04001561 goto out;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001562 }
1563
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001564 confirm_me = true;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001565 conf = unconf;
1566 } else {
1567 status = nfserr_stale_clientid;
1568 goto out;
1569 }
1570
J. Bruce Fields408b79b2010-04-15 15:11:09 -04001571 /*
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04001572 * XXX: we should probably set this at creation time, and check
1573 * for consistent minorversion use throughout:
1574 */
1575 conf->cl_minorversion = 1;
1576 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04001577 * We do not support RDMA or persistent sessions
1578 */
1579 cr_ses->flags &= ~SESSION4_PERSIST;
1580 cr_ses->flags &= ~SESSION4_RDMA;
1581
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001582 status = nfserr_jukebox;
1583 new = alloc_init_session(rqstp, conf, cr_ses);
1584 if (!new)
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001585 goto out;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001586 status = nfs_ok;
1587 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001588 NFS4_MAX_SESSIONID_LEN);
Mi Jinlong12050652010-11-11 18:03:40 +08001589 memcpy(&cr_ses->fore_channel, &new->se_fchannel,
1590 sizeof(struct nfsd4_channel_attrs));
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001591 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04001592 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001593
Andy Adamson49557cc2009-07-23 19:02:16 -04001594 /* cache solo and embedded create sessions under the state lock */
1595 nfsd4_cache_create_session(cr_ses, cs_slot, status);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001596 if (confirm_me)
1597 move_to_confirmed(conf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001598out:
1599 nfs4_unlock_state();
1600 dprintk("%s returns %d\n", __func__, ntohl(status));
1601 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001602}
1603
J. Bruce Fields57716352010-04-21 12:27:19 -04001604static bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
1605{
1606 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1607 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1608
1609 return argp->opcnt == resp->opcnt;
1610}
1611
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001612static __be32 nfsd4_map_bcts_dir(u32 *dir)
1613{
1614 switch (*dir) {
1615 case NFS4_CDFC4_FORE:
1616 case NFS4_CDFC4_BACK:
1617 return nfs_ok;
1618 case NFS4_CDFC4_FORE_OR_BOTH:
1619 case NFS4_CDFC4_BACK_OR_BOTH:
1620 *dir = NFS4_CDFC4_BOTH;
1621 return nfs_ok;
1622 };
1623 return nfserr_inval;
1624}
1625
1626__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
1627 struct nfsd4_compound_state *cstate,
1628 struct nfsd4_bind_conn_to_session *bcts)
1629{
1630 __be32 status;
1631
1632 if (!nfsd4_last_compound_op(rqstp))
1633 return nfserr_not_only_op;
1634 spin_lock(&client_lock);
1635 cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid);
1636 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1637 * client_lock iself: */
1638 if (cstate->session) {
1639 nfsd4_get_session(cstate->session);
1640 atomic_inc(&cstate->session->se_client->cl_refcount);
1641 }
1642 spin_unlock(&client_lock);
1643 if (!cstate->session)
1644 return nfserr_badsession;
1645
1646 status = nfsd4_map_bcts_dir(&bcts->dir);
1647 nfsd4_new_conn(rqstp, cstate->session, bcts->dir);
1648 return nfs_ok;
1649}
1650
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001651static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
1652{
1653 if (!session)
1654 return 0;
1655 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
1656}
1657
Andy Adamson069b6ad2009-04-03 08:27:58 +03001658__be32
1659nfsd4_destroy_session(struct svc_rqst *r,
1660 struct nfsd4_compound_state *cstate,
1661 struct nfsd4_destroy_session *sessionid)
1662{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001663 struct nfsd4_session *ses;
1664 u32 status = nfserr_badsession;
1665
1666 /* Notes:
1667 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1668 * - Should we return nfserr_back_chan_busy if waiting for
1669 * callbacks on to-be-destroyed session?
1670 * - Do we need to clear any callback info from previous session?
1671 */
1672
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001673 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04001674 if (!nfsd4_last_compound_op(r))
1675 return nfserr_not_only_op;
1676 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03001677 dump_sessionid(__func__, &sessionid->sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001678 spin_lock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001679 ses = find_in_sessionid_hashtbl(&sessionid->sessionid);
1680 if (!ses) {
Benny Halevy9089f1b2010-05-12 00:12:26 +03001681 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001682 goto out;
1683 }
1684
1685 unhash_session(ses);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001686 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001687
Benny Halevyab707e152010-05-12 00:14:06 +03001688 nfs4_lock_state();
Benny Halevye10e0cf2009-04-03 08:28:38 +03001689 /* wait for callbacks */
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001690 nfsd4_shutdown_callback(ses->se_client);
Benny Halevyab707e152010-05-12 00:14:06 +03001691 nfs4_unlock_state();
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001692
1693 nfsd4_del_conns(ses);
1694
Benny Halevye10e0cf2009-04-03 08:28:38 +03001695 nfsd4_put_session(ses);
1696 status = nfs_ok;
1697out:
1698 dprintk("%s returns %d\n", __func__, ntohl(status));
1699 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001700}
1701
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001702static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001703{
1704 struct nfsd4_conn *c;
1705
1706 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001707 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04001708 return c;
1709 }
1710 }
1711 return NULL;
1712}
1713
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001714static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001715{
1716 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001717 struct nfsd4_conn *c;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001718 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04001719
1720 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001721 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001722 if (c) {
1723 spin_unlock(&clp->cl_lock);
1724 free_conn(new);
1725 return;
1726 }
1727 __nfsd4_hash_conn(new, ses);
1728 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001729 ret = nfsd4_register_conn(new);
1730 if (ret)
1731 /* oops; xprt is already down: */
1732 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001733 return;
1734}
1735
Andy Adamson069b6ad2009-04-03 08:27:58 +03001736__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03001737nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03001738 struct nfsd4_compound_state *cstate,
1739 struct nfsd4_sequence *seq)
1740{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001741 struct nfsd4_compoundres *resp = rqstp->rq_resp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001742 struct nfsd4_session *session;
1743 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001744 struct nfsd4_conn *conn;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001745 int status;
1746
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001747 if (resp->opcnt != 1)
1748 return nfserr_sequence_pos;
1749
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001750 /*
1751 * Will be either used or freed by nfsd4_sequence_check_conn
1752 * below.
1753 */
1754 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
1755 if (!conn)
1756 return nfserr_jukebox;
1757
Benny Halevy9089f1b2010-05-12 00:12:26 +03001758 spin_lock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001759 status = nfserr_badsession;
1760 session = find_in_sessionid_hashtbl(&seq->sessionid);
1761 if (!session)
1762 goto out;
1763
1764 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03001765 if (seq->slotid >= session->se_fchannel.maxreqs)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001766 goto out;
1767
Andy Adamson557ce262009-08-28 08:45:04 -04001768 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03001769 dprintk("%s: slotid %d\n", __func__, seq->slotid);
1770
Andy Adamsona8dfdae2009-08-28 08:45:02 -04001771 /* We do not negotiate the number of slots yet, so set the
1772 * maxslots to the session maxreqs which is used to encode
1773 * sr_highest_slotid and the sr_target_slot id to maxslots */
1774 seq->maxslots = session->se_fchannel.maxreqs;
1775
Andy Adamson88e588d2009-07-23 19:02:15 -04001776 status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001777 if (status == nfserr_replay_cache) {
1778 cstate->slot = slot;
1779 cstate->session = session;
Andy Adamsonda3846a2009-04-03 08:28:22 +03001780 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04001781 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03001782 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03001783 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001784 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001785 }
1786 if (status)
1787 goto out;
1788
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001789 nfsd4_sequence_check_conn(conn, session);
1790 conn = NULL;
J. Bruce Fields328ead22010-09-29 16:11:06 -04001791
Benny Halevyb85d4c02009-04-03 08:28:08 +03001792 /* Success! bump slot seqid */
1793 slot->sl_inuse = true;
1794 slot->sl_seqid = seq->seqid;
Andy Adamson557ce262009-08-28 08:45:04 -04001795 slot->sl_cachethis = seq->cachethis;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001796
1797 cstate->slot = slot;
1798 cstate->session = session;
1799
Benny Halevyb85d4c02009-04-03 08:28:08 +03001800out:
J. Bruce Fields26c0c752010-04-24 15:35:43 -04001801 /* Hold a session reference until done processing the compound. */
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001802 if (cstate->session) {
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05001803 struct nfs4_client *clp = session->se_client;
1804
Benny Halevy36acb662010-05-12 00:13:04 +03001805 nfsd4_get_session(cstate->session);
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05001806 atomic_inc(&clp->cl_refcount);
1807 if (clp->cl_cb_state == NFSD4_CB_DOWN)
1808 seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001809 }
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001810 kfree(conn);
Benny Halevy36acb662010-05-12 00:13:04 +03001811 spin_unlock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001812 dprintk("%s: return %d\n", __func__, ntohl(status));
1813 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001814}
1815
1816__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001817nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
1818{
1819 if (rc->rca_one_fs) {
1820 if (!cstate->current_fh.fh_dentry)
1821 return nfserr_nofilehandle;
1822 /*
1823 * We don't take advantage of the rca_one_fs case.
1824 * That's OK, it's optional, we can safely ignore it.
1825 */
1826 return nfs_ok;
1827 }
1828 nfs4_lock_state();
1829 if (is_client_expired(cstate->session->se_client)) {
1830 nfs4_unlock_state();
1831 /*
1832 * The following error isn't really legal.
1833 * But we only get here if the client just explicitly
1834 * destroyed the client. Surely it no longer cares what
1835 * error it gets back on an operation for the dead
1836 * client.
1837 */
1838 return nfserr_stale_clientid;
1839 }
1840 nfsd4_create_clid_dir(cstate->session->se_client);
1841 nfs4_unlock_state();
1842 return nfs_ok;
1843}
1844
1845__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001846nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1847 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 struct xdr_netobj clname = {
1850 .len = setclid->se_namelen,
1851 .data = setclid->se_name,
1852 };
1853 nfs4_verifier clverifier = setclid->se_verf;
1854 unsigned int strhashval;
NeilBrown28ce6052005-06-23 22:03:56 -07001855 struct nfs4_client *conf, *unconf, *new;
Al Virob37ad282006-10-19 23:28:59 -07001856 __be32 status;
NeilBrowna55370a2005-06-23 22:03:52 -07001857 char dname[HEXDIR_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 if (!check_name(clname))
Neil Brown73aea4e2005-09-13 01:25:39 -07001860 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
NeilBrowna55370a2005-06-23 22:03:52 -07001862 status = nfs4_make_rec_clidname(dname, &clname);
1863 if (status)
Neil Brown73aea4e2005-09-13 01:25:39 -07001864 return status;
NeilBrowna55370a2005-06-23 22:03:52 -07001865
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 /*
1867 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1868 * We get here on a DRC miss.
1869 */
1870
NeilBrowna55370a2005-06-23 22:03:52 -07001871 strhashval = clientstr_hashval(dname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 nfs4_lock_state();
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001874 conf = find_confirmed_client_by_str(dname, strhashval);
NeilBrown28ce6052005-06-23 22:03:56 -07001875 if (conf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001876 /* RFC 3530 14.2.33 CASE 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001878 if (clp_used_exchangeid(conf))
1879 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04001880 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04001881 char addr_str[INET6_ADDRSTRLEN];
1882 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
1883 sizeof(addr_str));
1884 dprintk("NFSD: setclientid: string in use by client "
1885 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 goto out;
1887 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 }
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001889 /*
1890 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1891 * has a description of SETCLIENTID request processing consisting
1892 * of 5 bullet points, labeled as CASE0 - CASE4 below.
1893 */
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001894 unconf = find_unconfirmed_client_by_str(dname, strhashval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 status = nfserr_resource;
1896 if (!conf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001897 /*
1898 * RFC 3530 14.2.33 CASE 4:
1899 * placed first, because it is the normal case
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 */
1901 if (unconf)
1902 expire_client(unconf);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001903 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07001904 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906 gen_clid(new);
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001907 } else if (same_verf(&conf->cl_verifier, &clverifier)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 /*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001909 * RFC 3530 14.2.33 CASE 1:
1910 * probable callback update
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 */
NeilBrown31f4a6c2005-06-23 22:04:06 -07001912 if (unconf) {
1913 /* Note this is removing unconfirmed {*x***},
1914 * which is stronger than RFC recommended {vxc**}.
1915 * This has the advantage that there is at most
1916 * one {*x***} in either list at any time.
1917 */
1918 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 }
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001920 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07001921 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 copy_clid(new, conf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 } else if (!unconf) {
1925 /*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001926 * RFC 3530 14.2.33 CASE 2:
1927 * probable client reboot; state will be removed if
1928 * confirmed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 */
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001930 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07001931 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 gen_clid(new);
J. Bruce Fields49ba8782007-11-19 19:09:50 -05001934 } else {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001935 /*
1936 * RFC 3530 14.2.33 CASE 3:
1937 * probable client reboot; state will be removed if
1938 * confirmed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 */
1940 expire_client(unconf);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001941 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07001942 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 gen_clid(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 }
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04001946 /*
1947 * XXX: we should probably set this at creation time, and check
1948 * for consistent minorversion use throughout:
1949 */
1950 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001951 gen_callback(new, setclid, rqstp);
J. Bruce Fieldsc175b832007-08-09 18:34:32 -04001952 add_to_unconfirmed(new, strhashval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
1954 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
1955 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
1956 status = nfs_ok;
1957out:
1958 nfs4_unlock_state();
1959 return status;
1960}
1961
1962
1963/*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001964 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
1965 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
1966 * bullets, labeled as CASE1 - CASE4 below.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 */
Al Virob37ad282006-10-19 23:28:59 -07001968__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001969nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
1970 struct nfsd4_compound_state *cstate,
1971 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972{
Jeff Layton363168b2009-08-14 12:57:56 -04001973 struct sockaddr *sa = svc_addr(rqstp);
NeilBrown21ab45a2005-06-23 22:04:14 -07001974 struct nfs4_client *conf, *unconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
1976 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07001977 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
1979 if (STALE_CLIENTID(clid))
1980 return nfserr_stale_clientid;
1981 /*
1982 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1983 * We get here on a DRC miss.
1984 */
1985
1986 nfs4_lock_state();
NeilBrown21ab45a2005-06-23 22:04:14 -07001987
1988 conf = find_confirmed_client(clid);
1989 unconf = find_unconfirmed_client(clid);
1990
1991 status = nfserr_clid_inuse;
Jeff Layton363168b2009-08-14 12:57:56 -04001992 if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa))
NeilBrown21ab45a2005-06-23 22:04:14 -07001993 goto out;
Jeff Layton363168b2009-08-14 12:57:56 -04001994 if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa))
NeilBrown21ab45a2005-06-23 22:04:14 -07001995 goto out;
1996
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05001997 /*
1998 * section 14.2.34 of RFC 3530 has a description of
1999 * SETCLIENTID_CONFIRM request processing consisting
2000 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2001 */
J. Bruce Fields366e0c12007-11-20 15:54:10 -05002002 if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002003 /*
2004 * RFC 3530 14.2.34 CASE 1:
2005 * callback update
2006 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002007 if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 status = nfserr_clid_inuse;
2009 else {
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -04002010 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2011 nfsd4_probe_callback(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002012 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 status = nfs_ok;
NeilBrown1a69c172005-06-23 22:04:08 -07002014
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 }
J. Bruce Fieldsf3aba4e2007-11-20 16:52:07 -05002016 } else if (conf && !unconf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002017 /*
2018 * RFC 3530 14.2.34 CASE 2:
2019 * probable retransmitted request; play it safe and
2020 * do nothing.
NeilBrown7c79f732005-06-23 22:04:13 -07002021 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002022 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 status = nfserr_clid_inuse;
NeilBrown21ab45a2005-06-23 22:04:14 -07002024 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 status = nfs_ok;
NeilBrown7c79f732005-06-23 22:04:13 -07002026 } else if (!conf && unconf
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002027 && same_verf(&unconf->cl_confirm, &confirm)) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002028 /*
2029 * RFC 3530 14.2.34 CASE 3:
2030 * Normal case; new or rebooted client:
NeilBrown7c79f732005-06-23 22:04:13 -07002031 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002032 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 status = nfserr_clid_inuse;
2034 } else {
NeilBrown1a69c172005-06-23 22:04:08 -07002035 unsigned int hash =
2036 clientstr_hashval(unconf->cl_recdir);
2037 conf = find_confirmed_client_by_str(unconf->cl_recdir,
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002038 hash);
NeilBrown1a69c172005-06-23 22:04:08 -07002039 if (conf) {
NeilBrownc7b9a452005-06-23 22:04:30 -07002040 nfsd4_remove_clid_dir(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002041 expire_client(conf);
2042 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 move_to_confirmed(unconf);
NeilBrown21ab45a2005-06-23 22:04:14 -07002044 conf = unconf;
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -04002045 nfsd4_probe_callback(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002046 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 }
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002048 } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
2049 && (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
NeilBrown7c79f732005-06-23 22:04:13 -07002050 &confirm)))) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002051 /*
2052 * RFC 3530 14.2.34 CASE 4:
2053 * Client probably hasn't noticed that we rebooted yet.
NeilBrown7c79f732005-06-23 22:04:13 -07002054 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 status = nfserr_stale_clientid;
NeilBrown7c79f732005-06-23 22:04:13 -07002056 } else {
NeilBrown08e89872005-06-23 22:04:11 -07002057 /* check that we have hit one of the cases...*/
2058 status = nfserr_clid_inuse;
2059 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 nfs4_unlock_state();
2062 return status;
2063}
2064
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065/* OPEN Share state helper functions */
2066static inline struct nfs4_file *
2067alloc_init_file(struct inode *ino)
2068{
2069 struct nfs4_file *fp;
2070 unsigned int hashval = file_hashval(ino);
2071
NeilBrowne60d4392005-06-23 22:03:01 -07002072 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
2073 if (fp) {
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002074 atomic_set(&fp->fi_ref, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 INIT_LIST_HEAD(&fp->fi_hash);
NeilBrown8beefa22005-06-23 22:03:08 -07002076 INIT_LIST_HEAD(&fp->fi_stateids);
2077 INIT_LIST_HEAD(&fp->fi_delegations);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 fp->fi_inode = igrab(ino);
2079 fp->fi_id = current_fileid++;
Meelap Shah47f99402007-07-17 04:04:40 -07002080 fp->fi_had_conflict = false;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002081 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2082 memset(fp->fi_access, 0, sizeof(fp->fi_access));
Pavel Emelyanov47cee542010-05-17 20:00:37 +04002083 spin_lock(&recall_lock);
2084 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
2085 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 return fp;
2087 }
2088 return NULL;
2089}
2090
2091static void
Christoph Lametere18b8902006-12-06 20:33:20 -08002092nfsd4_free_slab(struct kmem_cache **slab)
NeilBrowne60d4392005-06-23 22:03:01 -07002093{
NeilBrowne60d4392005-06-23 22:03:01 -07002094 if (*slab == NULL)
2095 return;
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07002096 kmem_cache_destroy(*slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002097 *slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -07002098}
2099
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04002100void
NeilBrowne60d4392005-06-23 22:03:01 -07002101nfsd4_free_slabs(void)
2102{
2103 nfsd4_free_slab(&stateowner_slab);
2104 nfsd4_free_slab(&file_slab);
NeilBrown5ac049a2005-06-23 22:03:03 -07002105 nfsd4_free_slab(&stateid_slab);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002106 nfsd4_free_slab(&deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002107}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108
2109static int
2110nfsd4_init_slabs(void)
2111{
2112 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
Paul Mundt20c2df82007-07-20 10:11:58 +09002113 sizeof(struct nfs4_stateowner), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002114 if (stateowner_slab == NULL)
2115 goto out_nomem;
2116 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09002117 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002118 if (file_slab == NULL)
2119 goto out_nomem;
NeilBrown5ac049a2005-06-23 22:03:03 -07002120 stateid_slab = kmem_cache_create("nfsd4_stateids",
Paul Mundt20c2df82007-07-20 10:11:58 +09002121 sizeof(struct nfs4_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07002122 if (stateid_slab == NULL)
2123 goto out_nomem;
NeilBrown5b2d21c2005-06-23 22:03:04 -07002124 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09002125 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002126 if (deleg_slab == NULL)
2127 goto out_nomem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 return 0;
NeilBrowne60d4392005-06-23 22:03:01 -07002129out_nomem:
2130 nfsd4_free_slabs();
2131 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2132 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133}
2134
2135void
2136nfs4_free_stateowner(struct kref *kref)
2137{
2138 struct nfs4_stateowner *sop =
2139 container_of(kref, struct nfs4_stateowner, so_ref);
2140 kfree(sop->so_owner.data);
2141 kmem_cache_free(stateowner_slab, sop);
2142}
2143
2144static inline struct nfs4_stateowner *
2145alloc_stateowner(struct xdr_netobj *owner)
2146{
2147 struct nfs4_stateowner *sop;
2148
2149 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
2150 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
2151 memcpy(sop->so_owner.data, owner->data, owner->len);
2152 sop->so_owner.len = owner->len;
2153 kref_init(&sop->so_ref);
2154 return sop;
2155 }
2156 kmem_cache_free(stateowner_slab, sop);
2157 }
2158 return NULL;
2159}
2160
2161static struct nfs4_stateowner *
2162alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
2163 struct nfs4_stateowner *sop;
2164 struct nfs4_replay *rp;
2165 unsigned int idhashval;
2166
2167 if (!(sop = alloc_stateowner(&open->op_owner)))
2168 return NULL;
2169 idhashval = ownerid_hashval(current_ownerid);
2170 INIT_LIST_HEAD(&sop->so_idhash);
2171 INIT_LIST_HEAD(&sop->so_strhash);
2172 INIT_LIST_HEAD(&sop->so_perclient);
NeilBrownea1da632005-06-23 22:04:17 -07002173 INIT_LIST_HEAD(&sop->so_stateids);
2174 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 INIT_LIST_HEAD(&sop->so_close_lru);
2176 sop->so_time = 0;
2177 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
2178 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
NeilBrownea1da632005-06-23 22:04:17 -07002179 list_add(&sop->so_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 sop->so_is_open_owner = 1;
2181 sop->so_id = current_ownerid++;
2182 sop->so_client = clp;
2183 sop->so_seqid = open->op_seqid;
2184 sop->so_confirmed = 0;
2185 rp = &sop->so_replay;
Al Virode1ae282006-01-18 17:43:47 -08002186 rp->rp_status = nfserr_serverfault;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 rp->rp_buflen = 0;
2188 rp->rp_buf = rp->rp_ibuf;
2189 return sop;
2190}
2191
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192static inline void
2193init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
2194 struct nfs4_stateowner *sop = open->op_stateowner;
2195 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2196
2197 INIT_LIST_HEAD(&stp->st_hash);
NeilBrownea1da632005-06-23 22:04:17 -07002198 INIT_LIST_HEAD(&stp->st_perstateowner);
2199 INIT_LIST_HEAD(&stp->st_lockowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 INIT_LIST_HEAD(&stp->st_perfile);
2201 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
NeilBrownea1da632005-06-23 22:04:17 -07002202 list_add(&stp->st_perstateowner, &sop->so_stateids);
NeilBrown8beefa22005-06-23 22:03:08 -07002203 list_add(&stp->st_perfile, &fp->fi_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 stp->st_stateowner = sop;
NeilBrown13cd2182005-06-23 22:03:10 -07002205 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 stp->st_file = fp;
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04002207 stp->st_stateid.si_boot = boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 stp->st_stateid.si_stateownerid = sop->so_id;
2209 stp->st_stateid.si_fileid = fp->fi_id;
2210 stp->st_stateid.si_generation = 0;
2211 stp->st_access_bmap = 0;
2212 stp->st_deny_bmap = 0;
Andy Adamson84459a12009-04-03 08:28:56 +03002213 __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK,
2214 &stp->st_access_bmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
NeilBrown4c4cd222005-07-07 17:59:27 -07002216 stp->st_openstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217}
2218
2219static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220move_to_close_lru(struct nfs4_stateowner *sop)
2221{
2222 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
2223
NeilBrown358dd552006-04-10 22:55:42 -07002224 list_move_tail(&sop->so_close_lru, &close_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 sop->so_time = get_seconds();
2226}
2227
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002229same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2230 clientid_t *clid)
2231{
2232 return (sop->so_owner.len == owner->len) &&
2233 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2234 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235}
2236
2237static struct nfs4_stateowner *
2238find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
2239{
2240 struct nfs4_stateowner *so = NULL;
2241
2242 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002243 if (same_owner_str(so, &open->op_owner, &open->op_clientid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 return so;
2245 }
2246 return NULL;
2247}
2248
2249/* search file_hashtbl[] for file */
2250static struct nfs4_file *
2251find_file(struct inode *ino)
2252{
2253 unsigned int hashval = file_hashval(ino);
2254 struct nfs4_file *fp;
2255
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002256 spin_lock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
NeilBrown13cd2182005-06-23 22:03:10 -07002258 if (fp->fi_inode == ino) {
2259 get_nfs4_file(fp);
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002260 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07002262 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 }
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002264 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 return NULL;
2266}
2267
Andy Adamsond87a8ad2009-04-03 08:28:53 +03002268static inline int access_valid(u32 x, u32 minorversion)
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07002269{
Andy Adamsond87a8ad2009-04-03 08:28:53 +03002270 if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ)
J. Bruce Fields8838dc42008-01-14 13:12:19 -05002271 return 0;
Andy Adamsond87a8ad2009-04-03 08:28:53 +03002272 if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH)
2273 return 0;
2274 x &= ~NFS4_SHARE_ACCESS_MASK;
2275 if (minorversion && x) {
2276 if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL)
2277 return 0;
2278 if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED)
2279 return 0;
2280 x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK);
2281 }
2282 if (x)
J. Bruce Fields8838dc42008-01-14 13:12:19 -05002283 return 0;
2284 return 1;
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07002285}
2286
J. Bruce Fields8838dc42008-01-14 13:12:19 -05002287static inline int deny_valid(u32 x)
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07002288{
J. Bruce Fields8838dc42008-01-14 13:12:19 -05002289 /* Note: unlike access bits, deny bits may be zero. */
2290 return x <= NFS4_SHARE_DENY_BOTH;
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07002291}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04002293/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294 * Called to check deny when READ with all zero stateid or
2295 * WRITE with all zero or all one stateid
2296 */
Al Virob37ad282006-10-19 23:28:59 -07002297static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2299{
2300 struct inode *ino = current_fh->fh_dentry->d_inode;
2301 struct nfs4_file *fp;
2302 struct nfs4_stateid *stp;
Al Virob37ad282006-10-19 23:28:59 -07002303 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304
2305 dprintk("NFSD: nfs4_share_conflict\n");
2306
2307 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07002308 if (!fp)
2309 return nfs_ok;
NeilBrownb7009492005-07-07 17:59:23 -07002310 ret = nfserr_locked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 /* Search for conflicting share reservations */
NeilBrown13cd2182005-06-23 22:03:10 -07002312 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
2313 if (test_bit(deny_type, &stp->st_deny_bmap) ||
2314 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
2315 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316 }
NeilBrown13cd2182005-06-23 22:03:10 -07002317 ret = nfs_ok;
2318out:
2319 put_nfs4_file(fp);
2320 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321}
2322
2323static inline void
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002324nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325{
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002326 if (share_access & NFS4_SHARE_ACCESS_WRITE)
2327 nfs4_file_put_access(fp, O_WRONLY);
2328 if (share_access & NFS4_SHARE_ACCESS_READ)
2329 nfs4_file_put_access(fp, O_RDONLY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330}
2331
2332/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 * Spawn a thread to perform a recall on the delegation represented
2334 * by the lease (file_lock)
2335 *
Arnd Bergmann460781b2010-11-17 16:26:56 +01002336 * Called from break_lease() with lock_flocks() held.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 * Note: we assume break_lease will only call this *once* for any given
2338 * lease.
2339 */
2340static
2341void nfsd_break_deleg_cb(struct file_lock *fl)
2342{
J. Bruce Fields63e48632009-05-01 22:36:55 -04002343 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344
2345 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
2346 if (!dp)
2347 return;
2348
2349 /* We're assuming the state code never drops its reference
2350 * without first removing the lease. Since we're in this lease
2351 * callback (and since the lease code is serialized by the kernel
2352 * lock) we know the server hasn't removed the lease yet, we know
2353 * it's safe to take a reference: */
2354 atomic_inc(&dp->dl_count);
2355
2356 spin_lock(&recall_lock);
2357 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
2358 spin_unlock(&recall_lock);
2359
Arnd Bergmann460781b2010-11-17 16:26:56 +01002360 /* only place dl_time is set. protected by lock_flocks*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 dp->dl_time = get_seconds();
2362
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002363 /*
2364 * We don't want the locks code to timeout the lease for us;
2365 * we'll remove it ourself if the delegation isn't returned
2366 * in time.
2367 */
2368 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369
J. Bruce Fields63e48632009-05-01 22:36:55 -04002370 dp->dl_file->fi_had_conflict = true;
2371 nfsd4_cb_recall(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372}
2373
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374static
2375int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2376{
2377 if (arg & F_UNLCK)
2378 return lease_modify(onlist, arg);
2379 else
2380 return -EAGAIN;
2381}
2382
Alexey Dobriyan7b021962009-09-21 17:01:12 -07002383static const struct lock_manager_operations nfsd_lease_mng_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384 .fl_break = nfsd_break_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 .fl_change = nfsd_change_deleg_cb,
2386};
2387
2388
Al Virob37ad282006-10-19 23:28:59 -07002389__be32
Andy Adamson66689582009-04-03 08:28:45 +03002390nfsd4_process_open1(struct nfsd4_compound_state *cstate,
2391 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 clientid_t *clientid = &open->op_clientid;
2394 struct nfs4_client *clp = NULL;
2395 unsigned int strhashval;
2396 struct nfs4_stateowner *sop = NULL;
2397
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398 if (!check_name(open->op_owner))
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002399 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400
2401 if (STALE_CLIENTID(&open->op_clientid))
2402 return nfserr_stale_clientid;
2403
2404 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
2405 sop = find_openstateowner_str(strhashval, open);
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002406 open->op_stateowner = sop;
2407 if (!sop) {
2408 /* Make sure the client's lease hasn't expired. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 clp = find_confirmed_client(clientid);
2410 if (clp == NULL)
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002411 return nfserr_expired;
2412 goto renew;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413 }
Andy Adamson66689582009-04-03 08:28:45 +03002414 /* When sessions are used, skip open sequenceid processing */
2415 if (nfsd4_has_session(cstate))
2416 goto renew;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002417 if (!sop->so_confirmed) {
2418 /* Replace unconfirmed owners without checking for replay. */
2419 clp = sop->so_client;
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05002420 release_openowner(sop);
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002421 open->op_stateowner = NULL;
2422 goto renew;
2423 }
2424 if (open->op_seqid == sop->so_seqid - 1) {
2425 if (sop->so_replay.rp_buflen)
Al Viroa90b0612006-10-19 23:29:03 -07002426 return nfserr_replay_me;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002427 /* The original OPEN failed so spectacularly
2428 * that we don't even have replay data saved!
2429 * Therefore, we have no choice but to continue
2430 * processing this OPEN; presumably, we'll
2431 * fail again for the same reason.
2432 */
2433 dprintk("nfsd4_process_open1: replay with no replay cache\n");
2434 goto renew;
2435 }
2436 if (open->op_seqid != sop->so_seqid)
2437 return nfserr_bad_seqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438renew:
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002439 if (open->op_stateowner == NULL) {
2440 sop = alloc_init_open_stateowner(strhashval, clp, open);
2441 if (sop == NULL)
2442 return nfserr_resource;
2443 open->op_stateowner = sop;
2444 }
2445 list_del_init(&sop->so_close_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446 renew_client(sop->so_client);
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002447 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448}
2449
Al Virob37ad282006-10-19 23:28:59 -07002450static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07002451nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
2452{
2453 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
2454 return nfserr_openmode;
2455 else
2456 return nfs_ok;
2457}
2458
NeilBrown52f4fb42005-06-23 22:02:49 -07002459static struct nfs4_delegation *
2460find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
2461{
2462 struct nfs4_delegation *dp;
2463
NeilBrownea1da632005-06-23 22:04:17 -07002464 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
NeilBrown52f4fb42005-06-23 22:02:49 -07002465 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
2466 return dp;
2467 }
2468 return NULL;
2469}
2470
J. Bruce Fields24a01112010-05-18 20:01:35 -04002471int share_access_to_flags(u32 share_access)
2472{
2473 share_access &= ~NFS4_SHARE_WANT_MASK;
2474
2475 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
2476}
2477
Al Virob37ad282006-10-19 23:28:59 -07002478static __be32
NeilBrown567d9822005-06-23 22:02:53 -07002479nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
2480 struct nfs4_delegation **dp)
2481{
2482 int flags;
Al Virob37ad282006-10-19 23:28:59 -07002483 __be32 status = nfserr_bad_stateid;
NeilBrown567d9822005-06-23 22:02:53 -07002484
2485 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
2486 if (*dp == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07002487 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04002488 flags = share_access_to_flags(open->op_share_access);
NeilBrown567d9822005-06-23 22:02:53 -07002489 status = nfs4_check_delegmode(*dp, flags);
2490 if (status)
2491 *dp = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002492out:
2493 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
2494 return nfs_ok;
2495 if (status)
2496 return status;
2497 open->op_stateowner->so_confirmed = 1;
2498 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07002499}
2500
Al Virob37ad282006-10-19 23:28:59 -07002501static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
2503{
2504 struct nfs4_stateid *local;
Al Virob37ad282006-10-19 23:28:59 -07002505 __be32 status = nfserr_share_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 struct nfs4_stateowner *sop = open->op_stateowner;
2507
NeilBrown8beefa22005-06-23 22:03:08 -07002508 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 /* ignore lock owners */
2510 if (local->st_stateowner->so_is_open_owner == 0)
2511 continue;
2512 /* remember if we have seen this open owner */
2513 if (local->st_stateowner == sop)
2514 *stpp = local;
2515 /* check for conflicting share reservations */
2516 if (!test_share(local, open))
2517 goto out;
2518 }
2519 status = 0;
2520out:
2521 return status;
2522}
2523
NeilBrown5ac049a2005-06-23 22:03:03 -07002524static inline struct nfs4_stateid *
2525nfs4_alloc_stateid(void)
2526{
2527 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
2528}
2529
J. Bruce Fields21fb4012010-07-28 12:21:23 -04002530static inline int nfs4_access_to_access(u32 nfs4_access)
2531{
2532 int flags = 0;
2533
2534 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
2535 flags |= NFSD_MAY_READ;
2536 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
2537 flags |= NFSD_MAY_WRITE;
2538 return flags;
2539}
2540
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002541static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file
2542*fp, struct svc_fh *cur_fh, u32 nfs4_access)
2543{
2544 __be32 status;
2545 int oflag = nfs4_access_to_omode(nfs4_access);
2546 int access = nfs4_access_to_access(nfs4_access);
2547
2548 if (!fp->fi_fds[oflag]) {
2549 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
2550 &fp->fi_fds[oflag]);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002551 if (status)
2552 return status;
2553 }
2554 nfs4_file_get_access(fp, oflag);
2555
2556 return nfs_ok;
2557}
2558
Al Virob37ad282006-10-19 23:28:59 -07002559static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002561 struct nfs4_file *fp, struct svc_fh *cur_fh,
2562 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002563{
2564 struct nfs4_stateid *stp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002565 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002566
NeilBrown5ac049a2005-06-23 22:03:03 -07002567 stp = nfs4_alloc_stateid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568 if (stp == NULL)
2569 return nfserr_resource;
2570
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002571 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access);
2572 if (status) {
2573 kmem_cache_free(stateid_slab, stp);
2574 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 *stpp = stp;
2577 return 0;
2578}
2579
Al Virob37ad282006-10-19 23:28:59 -07002580static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
2582 struct nfsd4_open *open)
2583{
2584 struct iattr iattr = {
2585 .ia_valid = ATTR_SIZE,
2586 .ia_size = 0,
2587 };
2588 if (!open->op_truncate)
2589 return 0;
2590 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08002591 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
2593}
2594
Al Virob37ad282006-10-19 23:28:59 -07002595static __be32
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002596nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597{
J. Bruce Fields7d947842010-08-20 18:09:31 -04002598 u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK;
2599 bool new_access;
Al Virob37ad282006-10-19 23:28:59 -07002600 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601
J. Bruce Fields7d947842010-08-20 18:09:31 -04002602 new_access = !test_bit(op_share_access, &stp->st_access_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002603 if (new_access) {
J. Bruce Fields7d947842010-08-20 18:09:31 -04002604 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002605 if (status)
2606 return status;
J. Bruce Fields6c26d082006-01-18 17:43:38 -08002607 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 status = nfsd4_truncate(rqstp, cur_fh, open);
2609 if (status) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002610 if (new_access) {
2611 int oflag = nfs4_access_to_omode(new_access);
2612 nfs4_file_put_access(fp, oflag);
2613 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614 return status;
2615 }
2616 /* remember the open */
J. Bruce Fields24a01112010-05-18 20:01:35 -04002617 __set_bit(op_share_access, &stp->st_access_bmap);
J. Bruce Fieldsb55e0ba2008-04-28 18:22:50 -04002618 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619
2620 return nfs_ok;
2621}
2622
2623
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624static void
NeilBrown37515172005-07-07 17:59:16 -07002625nfs4_set_claim_prev(struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002626{
NeilBrown37515172005-07-07 17:59:16 -07002627 open->op_stateowner->so_confirmed = 1;
2628 open->op_stateowner->so_client->cl_firststate = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629}
2630
2631/*
2632 * Attempt to hand out a delegation.
2633 */
2634static void
2635nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
2636{
2637 struct nfs4_delegation *dp;
2638 struct nfs4_stateowner *sop = stp->st_stateowner;
J. Bruce Fields77a35692010-04-30 18:51:44 -04002639 /* XXX: or unknown and nfsv4.1: */
2640 int cb_up = (sop->so_client->cl_cb_state == NFSD4_CB_UP);
Arnd Bergmannc5b1f0d2010-10-27 15:46:08 +02002641 struct file_lock *fl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642 int status, flag = 0;
2643
2644 flag = NFS4_OPEN_DELEGATE_NONE;
NeilBrown7b190fe2005-06-23 22:03:23 -07002645 open->op_recall = 0;
2646 switch (open->op_claim_type) {
2647 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05002648 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07002649 open->op_recall = 1;
2650 flag = open->op_delegate_type;
2651 if (flag == NFS4_OPEN_DELEGATE_NONE)
2652 goto out;
2653 break;
2654 case NFS4_OPEN_CLAIM_NULL:
2655 /* Let's not give out any delegations till everyone's
2656 * had the chance to reclaim theirs.... */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002657 if (locks_in_grace())
NeilBrown7b190fe2005-06-23 22:03:23 -07002658 goto out;
J. Bruce Fields2bf23872010-03-08 12:37:27 -05002659 if (!cb_up || !sop->so_confirmed)
NeilBrown7b190fe2005-06-23 22:03:23 -07002660 goto out;
2661 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
2662 flag = NFS4_OPEN_DELEGATE_WRITE;
2663 else
2664 flag = NFS4_OPEN_DELEGATE_READ;
2665 break;
2666 default:
2667 goto out;
2668 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669
2670 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
2671 if (dp == NULL) {
2672 flag = NFS4_OPEN_DELEGATE_NONE;
2673 goto out;
2674 }
Arnd Bergmannc5b1f0d2010-10-27 15:46:08 +02002675 status = -ENOMEM;
2676 fl = locks_alloc_lock();
2677 if (!fl)
2678 goto out;
2679 locks_init_lock(fl);
2680 fl->fl_lmops = &nfsd_lease_mng_ops;
2681 fl->fl_flags = FL_LEASE;
2682 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
2683 fl->fl_end = OFFSET_MAX;
2684 fl->fl_owner = (fl_owner_t)dp;
2685 fl->fl_file = find_readable_file(stp->st_file);
2686 BUG_ON(!fl->fl_file);
2687 fl->fl_pid = current->tgid;
J. Bruce Fieldsfcf744a2010-10-30 17:31:16 -04002688 dp->dl_flock = fl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689
J. Bruce Fieldsa9933ce2007-06-07 17:09:49 -04002690 /* vfs_setlease checks to see if delegation should be handed out.
J. Bruce Fieldsc45821d2010-10-31 00:04:44 -04002691 * the lock_manager callback fl_change is used
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692 */
Arnd Bergmannc5b1f0d2010-10-27 15:46:08 +02002693 if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
J. Bruce Fieldsfcf744a2010-10-30 17:31:16 -04002695 dp->dl_flock = NULL;
Christoph Hellwig51ee4b82010-10-31 08:35:10 -04002696 locks_free_lock(fl);
NeilBrownc9071322005-04-16 15:26:38 -07002697 unhash_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 flag = NFS4_OPEN_DELEGATE_NONE;
2699 goto out;
2700 }
2701
2702 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
2703
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002704 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
2705 STATEID_VAL(&dp->dl_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002706out:
NeilBrown7b190fe2005-06-23 22:03:23 -07002707 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
2708 && flag == NFS4_OPEN_DELEGATE_NONE
2709 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
J. Bruce Fields2fdada02007-07-27 16:10:37 -04002710 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711 open->op_delegate_type = flag;
2712}
2713
2714/*
2715 * called with nfs4_lock_state() held.
2716 */
Al Virob37ad282006-10-19 23:28:59 -07002717__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
2719{
Andy Adamson66689582009-04-03 08:28:45 +03002720 struct nfsd4_compoundres *resp = rqstp->rq_resp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 struct nfs4_file *fp = NULL;
2722 struct inode *ino = current_fh->fh_dentry->d_inode;
2723 struct nfs4_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07002724 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07002725 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726
2727 status = nfserr_inval;
Andy Adamsond87a8ad2009-04-03 08:28:53 +03002728 if (!access_valid(open->op_share_access, resp->cstate.minorversion)
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07002729 || !deny_valid(open->op_share_deny))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 goto out;
2731 /*
2732 * Lookup file; if found, lookup stateid and check open request,
2733 * and check for delegations in the process of being recalled.
2734 * If not found, create the nfs4_file struct
2735 */
2736 fp = find_file(ino);
2737 if (fp) {
2738 if ((status = nfs4_check_open(fp, open, &stp)))
2739 goto out;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002740 status = nfs4_check_deleg(fp, open, &dp);
2741 if (status)
2742 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 } else {
NeilBrownc44c5ee2005-06-23 22:02:54 -07002744 status = nfserr_bad_stateid;
2745 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
2746 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747 status = nfserr_resource;
2748 fp = alloc_init_file(ino);
2749 if (fp == NULL)
2750 goto out;
2751 }
2752
2753 /*
2754 * OPEN the file, or upgrade an existing OPEN.
2755 * If truncate fails, the OPEN fails.
2756 */
2757 if (stp) {
2758 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002759 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 if (status)
2761 goto out;
NeilBrown444c2c02005-07-07 17:59:22 -07002762 update_stateid(&stp->st_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763 } else {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002764 status = nfs4_new_open(rqstp, &stp, fp, current_fh, open);
NeilBrown567d9822005-06-23 22:02:53 -07002765 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 goto out;
2767 init_stateid(stp, fp, open);
2768 status = nfsd4_truncate(rqstp, current_fh, open);
2769 if (status) {
J. Bruce Fields22839632009-01-11 14:27:17 -05002770 release_open_stateid(stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 goto out;
2772 }
Andy Adamson66689582009-04-03 08:28:45 +03002773 if (nfsd4_has_session(&resp->cstate))
2774 update_stateid(&stp->st_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002775 }
2776 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
2777
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002778 if (nfsd4_has_session(&resp->cstate))
Andy Adamson66689582009-04-03 08:28:45 +03002779 open->op_stateowner->so_confirmed = 1;
2780
Linus Torvalds1da177e2005-04-16 15:20:36 -07002781 /*
2782 * Attempt to hand out a delegation. No error return, because the
2783 * OPEN succeeds even if we fail.
2784 */
2785 nfs4_open_delegation(current_fh, open, stp);
2786
2787 status = nfs_ok;
2788
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002789 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
2790 STATEID_VAL(&stp->st_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791out:
NeilBrown13cd2182005-06-23 22:03:10 -07002792 if (fp)
2793 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07002794 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
2795 nfs4_set_claim_prev(open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796 /*
2797 * To finish the open response, we just need to set the rflags.
2798 */
2799 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
Andy Adamson66689582009-04-03 08:28:45 +03002800 if (!open->op_stateowner->so_confirmed &&
2801 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
2803
2804 return status;
2805}
2806
Al Virob37ad282006-10-19 23:28:59 -07002807__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002808nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2809 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002810{
2811 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07002812 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813
2814 nfs4_lock_state();
2815 dprintk("process_renew(%08x/%08x): starting\n",
2816 clid->cl_boot, clid->cl_id);
2817 status = nfserr_stale_clientid;
2818 if (STALE_CLIENTID(clid))
2819 goto out;
2820 clp = find_confirmed_client(clid);
2821 status = nfserr_expired;
2822 if (clp == NULL) {
2823 /* We assume the client took too long to RENEW. */
2824 dprintk("nfsd4_renew: clientid not found!\n");
2825 goto out;
2826 }
2827 renew_client(clp);
2828 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07002829 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04002830 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 goto out;
2832 status = nfs_ok;
2833out:
2834 nfs4_unlock_state();
2835 return status;
2836}
2837
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002838struct lock_manager nfsd4_manager = {
2839};
2840
NeilBrowna76b4312005-06-23 22:04:01 -07002841static void
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002842nfsd4_end_grace(void)
NeilBrowna76b4312005-06-23 22:04:01 -07002843{
2844 dprintk("NFSD: end of grace period\n");
NeilBrownc7b9a452005-06-23 22:04:30 -07002845 nfsd4_recdir_purge_old();
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002846 locks_end_grace(&nfsd4_manager);
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05002847 /*
2848 * Now that every NFSv4 client has had the chance to recover and
2849 * to see the (possibly new, possibly shorter) lease time, we
2850 * can safely set the next grace time to the current lease time:
2851 */
2852 nfsd4_grace = nfsd4_lease;
NeilBrowna76b4312005-06-23 22:04:01 -07002853}
2854
NeilBrownfd39ca92005-06-23 22:04:03 -07002855static time_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856nfs4_laundromat(void)
2857{
2858 struct nfs4_client *clp;
2859 struct nfs4_stateowner *sop;
2860 struct nfs4_delegation *dp;
2861 struct list_head *pos, *next, reaplist;
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05002862 time_t cutoff = get_seconds() - nfsd4_lease;
2863 time_t t, clientid_val = nfsd4_lease;
2864 time_t u, test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865
2866 nfs4_lock_state();
2867
2868 dprintk("NFSD: laundromat service - starting\n");
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002869 if (locks_in_grace())
2870 nfsd4_end_grace();
Benny Halevy36acb662010-05-12 00:13:04 +03002871 INIT_LIST_HEAD(&reaplist);
2872 spin_lock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873 list_for_each_safe(pos, next, &client_lru) {
2874 clp = list_entry(pos, struct nfs4_client, cl_lru);
2875 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
2876 t = clp->cl_time - cutoff;
2877 if (clientid_val > t)
2878 clientid_val = t;
2879 break;
2880 }
Benny Halevyd7682982010-05-12 00:13:54 +03002881 if (atomic_read(&clp->cl_refcount)) {
2882 dprintk("NFSD: client in use (clientid %08x)\n",
2883 clp->cl_clientid.cl_id);
2884 continue;
2885 }
2886 unhash_client_locked(clp);
2887 list_add(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03002888 }
2889 spin_unlock(&client_lock);
2890 list_for_each_safe(pos, next, &reaplist) {
2891 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002892 dprintk("NFSD: purging unused client (clientid %08x)\n",
2893 clp->cl_clientid.cl_id);
NeilBrownc7b9a452005-06-23 22:04:30 -07002894 nfsd4_remove_clid_dir(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895 expire_client(clp);
2896 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897 spin_lock(&recall_lock);
2898 list_for_each_safe(pos, next, &del_recall_lru) {
2899 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
2900 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
2901 u = dp->dl_time - cutoff;
2902 if (test_val > u)
2903 test_val = u;
2904 break;
2905 }
2906 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
2907 dp, dp->dl_flock);
2908 list_move(&dp->dl_recall_lru, &reaplist);
2909 }
2910 spin_unlock(&recall_lock);
2911 list_for_each_safe(pos, next, &reaplist) {
2912 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
2913 list_del_init(&dp->dl_recall_lru);
2914 unhash_delegation(dp);
2915 }
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05002916 test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002917 list_for_each_safe(pos, next, &close_lru) {
2918 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
2919 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
2920 u = sop->so_time - cutoff;
2921 if (test_val > u)
2922 test_val = u;
2923 break;
2924 }
2925 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
2926 sop->so_id);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05002927 release_openowner(sop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 }
2929 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
2930 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
2931 nfs4_unlock_state();
2932 return clientid_val;
2933}
2934
Harvey Harrisona254b242008-02-20 12:49:00 -08002935static struct workqueue_struct *laundry_wq;
2936static void laundromat_main(struct work_struct *);
2937static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
2938
2939static void
David Howellsc4028952006-11-22 14:57:56 +00002940laundromat_main(struct work_struct *not_used)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002941{
2942 time_t t;
2943
2944 t = nfs4_laundromat();
2945 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
NeilBrown58da2822005-06-23 22:03:19 -07002946 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002947}
2948
NeilBrownfd39ca92005-06-23 22:04:03 -07002949static struct nfs4_stateowner *
NeilBrownf8816512005-07-07 17:59:25 -07002950search_close_lru(u32 st_id, int flags)
2951{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952 struct nfs4_stateowner *local = NULL;
2953
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954 if (flags & CLOSE_STATE) {
2955 list_for_each_entry(local, &close_lru, so_close_lru) {
2956 if (local->so_id == st_id)
2957 return local;
2958 }
2959 }
2960 return NULL;
2961}
2962
2963static inline int
2964nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
2965{
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002966 return fhp->fh_dentry->d_inode != stp->st_file->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002967}
2968
2969static int
2970STALE_STATEID(stateid_t *stateid)
2971{
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04002972 if (stateid->si_boot == boot_time)
2973 return 0;
2974 dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002975 STATEID_VAL(stateid));
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04002976 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977}
2978
2979static inline int
2980access_permit_read(unsigned long access_bmap)
2981{
2982 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
2983 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
2984 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
2985}
2986
2987static inline int
2988access_permit_write(unsigned long access_bmap)
2989{
2990 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
2991 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2992}
2993
2994static
Al Virob37ad282006-10-19 23:28:59 -07002995__be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996{
Al Virob37ad282006-10-19 23:28:59 -07002997 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002998
J. Bruce Fields02921912010-07-29 15:16:59 -04002999 /* For lock stateid's, we test the parent open, not the lock: */
3000 if (stp->st_openstp)
3001 stp = stp->st_openstp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
3003 goto out;
3004 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
3005 goto out;
3006 status = nfs_ok;
3007out:
3008 return status;
3009}
3010
Al Virob37ad282006-10-19 23:28:59 -07003011static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003012check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
3013{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003014 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003015 return nfs_ok;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003016 else if (locks_in_grace()) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003017 /* Answer in remaining cases depends on existance of
3018 * conflicting state; so we must wait out the grace period. */
3019 return nfserr_grace;
3020 } else if (flags & WR_STATE)
3021 return nfs4_share_conflict(current_fh,
3022 NFS4_SHARE_DENY_WRITE);
3023 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3024 return nfs4_share_conflict(current_fh,
3025 NFS4_SHARE_DENY_READ);
3026}
3027
3028/*
3029 * Allow READ/WRITE during grace period on recovered state only for files
3030 * that are not able to provide mandatory locking.
3031 */
3032static inline int
J. Bruce Fields18f82732009-02-21 15:23:01 -08003033grace_disallows_io(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003034{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003035 return locks_in_grace() && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003036}
3037
Andy Adamson66689582009-04-03 08:28:45 +03003038static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags)
J. Bruce Fields0836f582008-01-26 19:08:12 -05003039{
Andy Adamson66689582009-04-03 08:28:45 +03003040 /*
3041 * When sessions are used the stateid generation number is ignored
3042 * when it is zero.
3043 */
3044 if ((flags & HAS_SESSION) && in->si_generation == 0)
3045 goto out;
3046
J. Bruce Fields0836f582008-01-26 19:08:12 -05003047 /* If the client sends us a stateid from the future, it's buggy: */
3048 if (in->si_generation > ref->si_generation)
3049 return nfserr_bad_stateid;
3050 /*
3051 * The following, however, can happen. For example, if the
3052 * client sends an open and some IO at the same time, the open
3053 * may bump si_generation while the IO is still in flight.
3054 * Thanks to hard links and renames, the client never knows what
3055 * file an open will affect. So it could avoid that situation
3056 * only by serializing all opens and IO from the same open
3057 * owner. To recover from the old_stateid error, the client
3058 * will just have to retry the IO:
3059 */
3060 if (in->si_generation < ref->si_generation)
3061 return nfserr_old_stateid;
Andy Adamson66689582009-04-03 08:28:45 +03003062out:
J. Bruce Fields0836f582008-01-26 19:08:12 -05003063 return nfs_ok;
3064}
3065
J. Bruce Fields3e633072009-02-21 13:17:19 -08003066static int is_delegation_stateid(stateid_t *stateid)
3067{
3068 return stateid->si_fileid == 0;
3069}
3070
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071/*
3072* Checks for stateid operations
3073*/
Al Virob37ad282006-10-19 23:28:59 -07003074__be32
Benny Halevydd453df2009-04-03 08:28:41 +03003075nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
3076 stateid_t *stateid, int flags, struct file **filpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077{
3078 struct nfs4_stateid *stp = NULL;
3079 struct nfs4_delegation *dp = NULL;
Benny Halevydd453df2009-04-03 08:28:41 +03003080 struct svc_fh *current_fh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003081 struct inode *ino = current_fh->fh_dentry->d_inode;
Al Virob37ad282006-10-19 23:28:59 -07003082 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003083
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084 if (filpp)
3085 *filpp = NULL;
3086
J. Bruce Fields18f82732009-02-21 15:23:01 -08003087 if (grace_disallows_io(ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088 return nfserr_grace;
3089
Andy Adamson66689582009-04-03 08:28:45 +03003090 if (nfsd4_has_session(cstate))
3091 flags |= HAS_SESSION;
3092
Linus Torvalds1da177e2005-04-16 15:20:36 -07003093 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3094 return check_special_stateids(current_fh, stateid, flags);
3095
Linus Torvalds1da177e2005-04-16 15:20:36 -07003096 status = nfserr_stale_stateid;
3097 if (STALE_STATEID(stateid))
3098 goto out;
3099
J. Bruce Fields33515142010-10-02 18:42:39 -04003100 /*
3101 * We assume that any stateid that has the current boot time,
3102 * but that we can't find, is expired:
3103 */
3104 status = nfserr_expired;
J. Bruce Fields3e633072009-02-21 13:17:19 -08003105 if (is_delegation_stateid(stateid)) {
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003106 dp = find_delegation_stateid(ino, stateid);
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003107 if (!dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108 goto out;
Andy Adamson66689582009-04-03 08:28:45 +03003109 status = check_stateid_generation(stateid, &dp->dl_stateid,
3110 flags);
J. Bruce Fields0c2a4982009-02-21 11:11:50 -08003111 if (status)
3112 goto out;
J. Bruce Fieldsdc9bf702009-02-21 11:14:43 -08003113 status = nfs4_check_delegmode(dp, flags);
3114 if (status)
3115 goto out;
3116 renew_client(dp->dl_client);
Dan Carpenter43b01782010-10-27 23:19:04 +02003117 if (filpp) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003118 *filpp = find_readable_file(dp->dl_file);
Dan Carpenter43b01782010-10-27 23:19:04 +02003119 BUG_ON(!*filpp);
3120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121 } else { /* open or lock stateid */
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003122 stp = find_stateid(stateid, flags);
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003123 if (!stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003124 goto out;
J. Bruce Fields33515142010-10-02 18:42:39 -04003125 status = nfserr_bad_stateid;
J. Bruce Fields6150ef02009-02-21 13:36:16 -08003126 if (nfs4_check_fh(current_fh, stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 goto out;
3128 if (!stp->st_stateowner->so_confirmed)
3129 goto out;
Andy Adamson66689582009-04-03 08:28:45 +03003130 status = check_stateid_generation(stateid, &stp->st_stateid,
3131 flags);
J. Bruce Fields0c2a4982009-02-21 11:11:50 -08003132 if (status)
3133 goto out;
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003134 status = nfs4_check_openmode(stp, flags);
3135 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003136 goto out;
3137 renew_client(stp->st_stateowner->so_client);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003138 if (filpp) {
3139 if (flags & RD_STATE)
3140 *filpp = find_readable_file(stp->st_file);
3141 else
3142 *filpp = find_writeable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003143 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144 }
3145 status = nfs_ok;
3146out:
3147 return status;
3148}
3149
NeilBrown4c4cd222005-07-07 17:59:27 -07003150static inline int
3151setlkflg (int type)
3152{
3153 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
3154 RD_STATE : WR_STATE;
3155}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156
3157/*
3158 * Checks for sequence id mutating operations.
3159 */
Al Virob37ad282006-10-19 23:28:59 -07003160static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03003161nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
3162 stateid_t *stateid, int flags,
3163 struct nfs4_stateowner **sopp,
3164 struct nfs4_stateid **stpp, struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003166 struct nfs4_stateid *stp;
3167 struct nfs4_stateowner *sop;
Benny Halevydd453df2009-04-03 08:28:41 +03003168 struct svc_fh *current_fh = &cstate->current_fh;
J. Bruce Fields0836f582008-01-26 19:08:12 -05003169 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003171 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
3172 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07003173
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174 *stpp = NULL;
3175 *sopp = NULL;
3176
Linus Torvalds1da177e2005-04-16 15:20:36 -07003177 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003178 dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
NeilBrown3a4f98b2005-07-07 17:59:26 -07003179 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003180 }
3181
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182 if (STALE_STATEID(stateid))
NeilBrown3a4f98b2005-07-07 17:59:26 -07003183 return nfserr_stale_stateid;
Andy Adamson66689582009-04-03 08:28:45 +03003184
3185 if (nfsd4_has_session(cstate))
3186 flags |= HAS_SESSION;
3187
Linus Torvalds1da177e2005-04-16 15:20:36 -07003188 /*
3189 * We return BAD_STATEID if filehandle doesn't match stateid,
3190 * the confirmed flag is incorrecly set, or the generation
3191 * number is incorrect.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003192 */
NeilBrownf8816512005-07-07 17:59:25 -07003193 stp = find_stateid(stateid, flags);
3194 if (stp == NULL) {
3195 /*
3196 * Also, we should make sure this isn't just the result of
3197 * a replayed close:
3198 */
3199 sop = search_close_lru(stateid->si_stateownerid, flags);
J. Bruce Fields33515142010-10-02 18:42:39 -04003200 /* It's not stale; let's assume it's expired: */
NeilBrownf8816512005-07-07 17:59:25 -07003201 if (sop == NULL)
J. Bruce Fields33515142010-10-02 18:42:39 -04003202 return nfserr_expired;
NeilBrownf8816512005-07-07 17:59:25 -07003203 *sopp = sop;
3204 goto check_replay;
3205 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206
J. Bruce Fields39325bd2007-11-26 17:06:39 -05003207 *stpp = stp;
3208 *sopp = sop = stp->st_stateowner;
3209
NeilBrown4c4cd222005-07-07 17:59:27 -07003210 if (lock) {
NeilBrown4c4cd222005-07-07 17:59:27 -07003211 clientid_t *lockclid = &lock->v.new.clientid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212 struct nfs4_client *clp = sop->so_client;
NeilBrown4c4cd222005-07-07 17:59:27 -07003213 int lkflg = 0;
Al Virob37ad282006-10-19 23:28:59 -07003214 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003215
NeilBrown4c4cd222005-07-07 17:59:27 -07003216 lkflg = setlkflg(lock->lk_type);
3217
3218 if (lock->lk_is_new) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04003219 if (!sop->so_is_open_owner)
3220 return nfserr_bad_stateid;
Andy Adamson60adfc52009-04-03 08:28:50 +03003221 if (!(flags & HAS_SESSION) &&
3222 !same_clid(&clp->cl_clientid, lockclid))
3223 return nfserr_bad_stateid;
J. Bruce Fields599e0a22007-07-26 17:04:54 -04003224 /* stp is the open stateid */
3225 status = nfs4_check_openmode(stp, lkflg);
3226 if (status)
3227 return status;
3228 } else {
3229 /* stp is the lock stateid */
3230 status = nfs4_check_openmode(stp->st_openstp, lkflg);
3231 if (status)
3232 return status;
NeilBrown4c4cd222005-07-07 17:59:27 -07003233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234 }
3235
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003236 if (nfs4_check_fh(current_fh, stp)) {
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003237 dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
NeilBrown3a4f98b2005-07-07 17:59:26 -07003238 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003239 }
3240
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 /*
3242 * We now validate the seqid and stateid generation numbers.
3243 * For the moment, we ignore the possibility of
3244 * generation number wraparound.
3245 */
Andy Adamson66689582009-04-03 08:28:45 +03003246 if (!(flags & HAS_SESSION) && seqid != sop->so_seqid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 goto check_replay;
3248
NeilBrown3a4f98b2005-07-07 17:59:26 -07003249 if (sop->so_confirmed && flags & CONFIRM) {
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003250 dprintk("NFSD: preprocess_seqid_op: expected"
NeilBrown3a4f98b2005-07-07 17:59:26 -07003251 " unconfirmed stateowner!\n");
3252 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253 }
NeilBrown3a4f98b2005-07-07 17:59:26 -07003254 if (!sop->so_confirmed && !(flags & CONFIRM)) {
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003255 dprintk("NFSD: preprocess_seqid_op: stateowner not"
NeilBrown3a4f98b2005-07-07 17:59:26 -07003256 " confirmed yet!\n");
3257 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258 }
Andy Adamson66689582009-04-03 08:28:45 +03003259 status = check_stateid_generation(stateid, &stp->st_stateid, flags);
J. Bruce Fields0836f582008-01-26 19:08:12 -05003260 if (status)
3261 return status;
NeilBrown52fd0042005-07-07 17:59:24 -07003262 renew_client(sop->so_client);
NeilBrown3a4f98b2005-07-07 17:59:26 -07003263 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264
Linus Torvalds1da177e2005-04-16 15:20:36 -07003265check_replay:
NeilBrownbd9aac52005-07-07 17:59:19 -07003266 if (seqid == sop->so_seqid - 1) {
Neil Brown849823c2005-09-13 01:25:36 -07003267 dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268 /* indicate replay to calling function */
Al Viroa90b0612006-10-19 23:29:03 -07003269 return nfserr_replay_me;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003270 }
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003271 dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
NeilBrown3a4f98b2005-07-07 17:59:26 -07003272 sop->so_seqid, seqid);
3273 *sopp = NULL;
3274 return nfserr_bad_seqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275}
3276
Al Virob37ad282006-10-19 23:28:59 -07003277__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003278nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003279 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003280{
Al Virob37ad282006-10-19 23:28:59 -07003281 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282 struct nfs4_stateowner *sop;
3283 struct nfs4_stateid *stp;
3284
3285 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003286 (int)cstate->current_fh.fh_dentry->d_name.len,
3287 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003289 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07003290 if (status)
3291 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003292
3293 nfs4_lock_state();
3294
Benny Halevydd453df2009-04-03 08:28:41 +03003295 if ((status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003296 oc->oc_seqid, &oc->oc_req_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003297 CONFIRM | OPEN_STATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298 &oc->oc_stateowner, &stp, NULL)))
3299 goto out;
3300
3301 sop = oc->oc_stateowner;
3302 sop->so_confirmed = 1;
3303 update_stateid(&stp->st_stateid);
3304 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003305 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
3306 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07003307
3308 nfsd4_create_clid_dir(sop->so_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003309out:
Neil Brownf2327d92005-09-13 01:25:37 -07003310 if (oc->oc_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311 nfs4_get_stateowner(oc->oc_stateowner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003312 cstate->replay_owner = oc->oc_stateowner;
Neil Brownf2327d92005-09-13 01:25:37 -07003313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003314 nfs4_unlock_state();
3315 return status;
3316}
3317
3318
3319/*
3320 * unset all bits in union bitmap (bmap) that
3321 * do not exist in share (from successful OPEN_DOWNGRADE)
3322 */
3323static void
3324reset_union_bmap_access(unsigned long access, unsigned long *bmap)
3325{
3326 int i;
3327 for (i = 1; i < 4; i++) {
3328 if ((i & access) != i)
3329 __clear_bit(i, bmap);
3330 }
3331}
3332
3333static void
3334reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
3335{
3336 int i;
3337 for (i = 0; i < 4; i++) {
3338 if ((i & deny) != i)
3339 __clear_bit(i, bmap);
3340 }
3341}
3342
Al Virob37ad282006-10-19 23:28:59 -07003343__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003344nfsd4_open_downgrade(struct svc_rqst *rqstp,
3345 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003346 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347{
Al Virob37ad282006-10-19 23:28:59 -07003348 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003349 struct nfs4_stateid *stp;
3350 unsigned int share_access;
3351
3352 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003353 (int)cstate->current_fh.fh_dentry->d_name.len,
3354 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355
Andy Adamsond87a8ad2009-04-03 08:28:53 +03003356 if (!access_valid(od->od_share_access, cstate->minorversion)
J. Bruce Fieldsba5a6a12006-06-30 01:56:16 -07003357 || !deny_valid(od->od_share_deny))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358 return nfserr_inval;
3359
3360 nfs4_lock_state();
Benny Halevydd453df2009-04-03 08:28:41 +03003361 if ((status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003362 od->od_seqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 &od->od_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003364 OPEN_STATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003365 &od->od_stateowner, &stp, NULL)))
3366 goto out;
3367
3368 status = nfserr_inval;
3369 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
3370 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3371 stp->st_access_bmap, od->od_share_access);
3372 goto out;
3373 }
3374 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
3375 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3376 stp->st_deny_bmap, od->od_share_deny);
3377 goto out;
3378 }
3379 set_access(&share_access, stp->st_access_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003380 nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381
3382 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
3383 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
3384
3385 update_stateid(&stp->st_stateid);
3386 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
3387 status = nfs_ok;
3388out:
Neil Brownf2327d92005-09-13 01:25:37 -07003389 if (od->od_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003390 nfs4_get_stateowner(od->od_stateowner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003391 cstate->replay_owner = od->od_stateowner;
Neil Brownf2327d92005-09-13 01:25:37 -07003392 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393 nfs4_unlock_state();
3394 return status;
3395}
3396
3397/*
3398 * nfs4_unlock_state() called after encode
3399 */
Al Virob37ad282006-10-19 23:28:59 -07003400__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003401nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003402 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003403{
Al Virob37ad282006-10-19 23:28:59 -07003404 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003405 struct nfs4_stateid *stp;
3406
3407 dprintk("NFSD: nfsd4_close on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003408 (int)cstate->current_fh.fh_dentry->d_name.len,
3409 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410
3411 nfs4_lock_state();
3412 /* check close_lru for replay */
Benny Halevydd453df2009-04-03 08:28:41 +03003413 if ((status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003414 close->cl_seqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003415 &close->cl_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003416 OPEN_STATE | CLOSE_STATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417 &close->cl_stateowner, &stp, NULL)))
3418 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003419 status = nfs_ok;
3420 update_stateid(&stp->st_stateid);
3421 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
3422
J. Bruce Fields04ef5952006-01-18 17:43:21 -08003423 /* release_stateid() calls nfsd_close() if needed */
J. Bruce Fields22839632009-01-11 14:27:17 -05003424 release_open_stateid(stp);
J. Bruce Fields04ef5952006-01-18 17:43:21 -08003425
3426 /* place unused nfs4_stateowners on so_close_lru list to be
3427 * released by the laundromat service after the lease period
3428 * to enable us to handle CLOSE replay
3429 */
3430 if (list_empty(&close->cl_stateowner->so_stateids))
3431 move_to_close_lru(close->cl_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003432out:
Neil Brownf2327d92005-09-13 01:25:37 -07003433 if (close->cl_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003434 nfs4_get_stateowner(close->cl_stateowner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003435 cstate->replay_owner = close->cl_stateowner;
Neil Brownf2327d92005-09-13 01:25:37 -07003436 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437 nfs4_unlock_state();
3438 return status;
3439}
3440
Al Virob37ad282006-10-19 23:28:59 -07003441__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003442nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3443 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003445 struct nfs4_delegation *dp;
3446 stateid_t *stateid = &dr->dr_stateid;
3447 struct inode *inode;
Al Virob37ad282006-10-19 23:28:59 -07003448 __be32 status;
Andy Adamson66689582009-04-03 08:28:45 +03003449 int flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003451 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003452 return status;
3453 inode = cstate->current_fh.fh_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003454
Andy Adamson66689582009-04-03 08:28:45 +03003455 if (nfsd4_has_session(cstate))
3456 flags |= HAS_SESSION;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 nfs4_lock_state();
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003458 status = nfserr_bad_stateid;
3459 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3460 goto out;
3461 status = nfserr_stale_stateid;
3462 if (STALE_STATEID(stateid))
3463 goto out;
J. Bruce Fields7e0f7cf2009-02-21 13:32:28 -08003464 status = nfserr_bad_stateid;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003465 if (!is_delegation_stateid(stateid))
3466 goto out;
J. Bruce Fields33515142010-10-02 18:42:39 -04003467 status = nfserr_expired;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003468 dp = find_delegation_stateid(inode, stateid);
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003469 if (!dp)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003470 goto out;
Andy Adamson66689582009-04-03 08:28:45 +03003471 status = check_stateid_generation(stateid, &dp->dl_stateid, flags);
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003472 if (status)
3473 goto out;
3474 renew_client(dp->dl_client);
3475
3476 unhash_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477out:
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003478 nfs4_unlock_state();
3479
Linus Torvalds1da177e2005-04-16 15:20:36 -07003480 return status;
3481}
3482
3483
3484/*
3485 * Lock owner state (byte-range locks)
3486 */
3487#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3488#define LOCK_HASH_BITS 8
3489#define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3490#define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3491
Benny Halevy87df4de2008-12-15 19:42:03 +02003492static inline u64
3493end_offset(u64 start, u64 len)
3494{
3495 u64 end;
3496
3497 end = start + len;
3498 return end >= start ? end: NFS4_MAX_UINT64;
3499}
3500
3501/* last octet in a range */
3502static inline u64
3503last_byte_offset(u64 start, u64 len)
3504{
3505 u64 end;
3506
3507 BUG_ON(!len);
3508 end = start + len;
3509 return end > start ? end - 1: NFS4_MAX_UINT64;
3510}
3511
Linus Torvalds1da177e2005-04-16 15:20:36 -07003512#define lockownerid_hashval(id) \
3513 ((id) & LOCK_HASH_MASK)
3514
3515static inline unsigned int
3516lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
3517 struct xdr_netobj *ownername)
3518{
3519 return (file_hashval(inode) + cl_id
3520 + opaque_hashval(ownername->data, ownername->len))
3521 & LOCK_HASH_MASK;
3522}
3523
3524static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
3525static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
3526static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
3527
NeilBrownfd39ca92005-06-23 22:04:03 -07003528static struct nfs4_stateid *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003529find_stateid(stateid_t *stid, int flags)
3530{
Krishna Kumar9346eff2008-10-20 11:44:28 +05303531 struct nfs4_stateid *local;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532 u32 st_id = stid->si_stateownerid;
3533 u32 f_id = stid->si_fileid;
3534 unsigned int hashval;
3535
3536 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
Krishna Kumar9346eff2008-10-20 11:44:28 +05303537 if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003538 hashval = stateid_hashval(st_id, f_id);
3539 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
3540 if ((local->st_stateid.si_stateownerid == st_id) &&
3541 (local->st_stateid.si_fileid == f_id))
3542 return local;
3543 }
3544 }
Krishna Kumar9346eff2008-10-20 11:44:28 +05303545
3546 if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003547 hashval = stateid_hashval(st_id, f_id);
3548 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
3549 if ((local->st_stateid.si_stateownerid == st_id) &&
3550 (local->st_stateid.si_fileid == f_id))
3551 return local;
3552 }
Neil Brown849823c2005-09-13 01:25:36 -07003553 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 return NULL;
3555}
3556
3557static struct nfs4_delegation *
3558find_delegation_stateid(struct inode *ino, stateid_t *stid)
3559{
NeilBrown13cd2182005-06-23 22:03:10 -07003560 struct nfs4_file *fp;
3561 struct nfs4_delegation *dl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003563 dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__,
3564 STATEID_VAL(stid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003565
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07003567 if (!fp)
3568 return NULL;
3569 dl = find_delegation_file(fp, stid);
3570 put_nfs4_file(fp);
3571 return dl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003572}
3573
3574/*
3575 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3576 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3577 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3578 * locking, this prevents us from being completely protocol-compliant. The
3579 * real solution to this problem is to start using unsigned file offsets in
3580 * the VFS, but this is a very deep change!
3581 */
3582static inline void
3583nfs4_transform_lock_offset(struct file_lock *lock)
3584{
3585 if (lock->fl_start < 0)
3586 lock->fl_start = OFFSET_MAX;
3587 if (lock->fl_end < 0)
3588 lock->fl_end = OFFSET_MAX;
3589}
3590
NeilBrownd5b90262006-04-10 22:55:22 -07003591/* Hack!: For now, we're defining this just so we can use a pointer to it
3592 * as a unique cookie to identify our (NFSv4's) posix locks. */
Alexey Dobriyan7b021962009-09-21 17:01:12 -07003593static const struct lock_manager_operations nfsd_posix_mng_ops = {
NeilBrownd5b90262006-04-10 22:55:22 -07003594};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595
3596static inline void
3597nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
3598{
NeilBrownd5b90262006-04-10 22:55:22 -07003599 struct nfs4_stateowner *sop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003600
NeilBrownd5b90262006-04-10 22:55:22 -07003601 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
3602 sop = (struct nfs4_stateowner *) fl->fl_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003603 kref_get(&sop->so_ref);
3604 deny->ld_sop = sop;
3605 deny->ld_clientid = sop->so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07003606 } else {
3607 deny->ld_sop = NULL;
3608 deny->ld_clientid.cl_boot = 0;
3609 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003610 }
3611 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02003612 deny->ld_length = NFS4_MAX_UINT64;
3613 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614 deny->ld_length = fl->fl_end - fl->fl_start + 1;
3615 deny->ld_type = NFS4_READ_LT;
3616 if (fl->fl_type != F_RDLCK)
3617 deny->ld_type = NFS4_WRITE_LT;
3618}
3619
3620static struct nfs4_stateowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003621find_lockstateowner_str(struct inode *inode, clientid_t *clid,
3622 struct xdr_netobj *owner)
3623{
3624 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
3625 struct nfs4_stateowner *op;
3626
3627 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04003628 if (same_owner_str(op, owner, clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629 return op;
3630 }
3631 return NULL;
3632}
3633
3634/*
3635 * Alloc a lock owner structure.
3636 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3637 * occured.
3638 *
3639 * strhashval = lock_ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07003640 */
3641
3642static struct nfs4_stateowner *
3643alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
3644 struct nfs4_stateowner *sop;
3645 struct nfs4_replay *rp;
3646 unsigned int idhashval;
3647
3648 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
3649 return NULL;
3650 idhashval = lockownerid_hashval(current_ownerid);
3651 INIT_LIST_HEAD(&sop->so_idhash);
3652 INIT_LIST_HEAD(&sop->so_strhash);
3653 INIT_LIST_HEAD(&sop->so_perclient);
NeilBrownea1da632005-06-23 22:04:17 -07003654 INIT_LIST_HEAD(&sop->so_stateids);
3655 INIT_LIST_HEAD(&sop->so_perstateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003656 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
3657 sop->so_time = 0;
3658 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
3659 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
NeilBrownea1da632005-06-23 22:04:17 -07003660 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661 sop->so_is_open_owner = 0;
3662 sop->so_id = current_ownerid++;
3663 sop->so_client = clp;
Neil Brownb59e3c02005-09-13 01:25:38 -07003664 /* It is the openowner seqid that will be incremented in encode in the
3665 * case of new lockowners; so increment the lock seqid manually: */
3666 sop->so_seqid = lock->lk_new_lock_seqid + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003667 sop->so_confirmed = 1;
3668 rp = &sop->so_replay;
Al Virode1ae282006-01-18 17:43:47 -08003669 rp->rp_status = nfserr_serverfault;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670 rp->rp_buflen = 0;
3671 rp->rp_buf = rp->rp_ibuf;
3672 return sop;
3673}
3674
NeilBrownfd39ca92005-06-23 22:04:03 -07003675static struct nfs4_stateid *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
3677{
3678 struct nfs4_stateid *stp;
3679 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
3680
NeilBrown5ac049a2005-06-23 22:03:03 -07003681 stp = nfs4_alloc_stateid();
3682 if (stp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 goto out;
3684 INIT_LIST_HEAD(&stp->st_hash);
3685 INIT_LIST_HEAD(&stp->st_perfile);
NeilBrownea1da632005-06-23 22:04:17 -07003686 INIT_LIST_HEAD(&stp->st_perstateowner);
3687 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
NeilBrown8beefa22005-06-23 22:03:08 -07003689 list_add(&stp->st_perfile, &fp->fi_stateids);
NeilBrownea1da632005-06-23 22:04:17 -07003690 list_add(&stp->st_perstateowner, &sop->so_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003691 stp->st_stateowner = sop;
NeilBrown13cd2182005-06-23 22:03:10 -07003692 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693 stp->st_file = fp;
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003694 stp->st_stateid.si_boot = boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003695 stp->st_stateid.si_stateownerid = sop->so_id;
3696 stp->st_stateid.si_fileid = fp->fi_id;
3697 stp->st_stateid.si_generation = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003698 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07003699 stp->st_openstp = open_stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700
3701out:
3702 return stp;
3703}
3704
NeilBrownfd39ca92005-06-23 22:04:03 -07003705static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003706check_lock_length(u64 offset, u64 length)
3707{
Benny Halevy87df4de2008-12-15 19:42:03 +02003708 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709 LOFF_OVERFLOW(offset, length)));
3710}
3711
3712/*
3713 * LOCK operation
3714 */
Al Virob37ad282006-10-19 23:28:59 -07003715__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003716nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003717 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003718{
NeilBrown3e9e3db2005-06-23 22:04:20 -07003719 struct nfs4_stateowner *open_sop = NULL;
Neil Brownb59e3c02005-09-13 01:25:38 -07003720 struct nfs4_stateowner *lock_sop = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 struct nfs4_stateid *lock_stp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04003722 struct nfs4_file *fp;
3723 struct file *filp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003724 struct file_lock file_lock;
Andy Adamson8dc7c312006-03-20 13:44:26 -05003725 struct file_lock conflock;
Al Virob37ad282006-10-19 23:28:59 -07003726 __be32 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727 unsigned int strhashval;
Marc Eshel150b3932007-01-18 16:15:35 -05003728 unsigned int cmd;
Al Virob8dd7b92006-10-19 23:29:01 -07003729 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003730
3731 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3732 (long long) lock->lk_offset,
3733 (long long) lock->lk_length);
3734
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735 if (check_lock_length(lock->lk_offset, lock->lk_length))
3736 return nfserr_inval;
3737
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003738 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02003739 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08003740 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3741 return status;
3742 }
3743
Linus Torvalds1da177e2005-04-16 15:20:36 -07003744 nfs4_lock_state();
3745
3746 if (lock->lk_is_new) {
NeilBrown893f8772005-07-07 17:59:17 -07003747 /*
3748 * Client indicates that this is a new lockowner.
3749 * Use open owner and open stateid to create lock owner and
3750 * lock stateid.
3751 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752 struct nfs4_stateid *open_stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003753
3754 status = nfserr_stale_clientid;
Andy Adamson60adfc52009-04-03 08:28:50 +03003755 if (!nfsd4_has_session(cstate) &&
3756 STALE_CLIENTID(&lock->lk_new_clientid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003757 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 /* validate and update open stateid and open seqid */
Benny Halevydd453df2009-04-03 08:28:41 +03003760 status = nfs4_preprocess_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003761 lock->lk_new_open_seqid,
3762 &lock->lk_new_open_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003763 OPEN_STATE,
J. Bruce Fields3a655882006-01-18 17:43:19 -08003764 &lock->lk_replay_owner, &open_stp,
Neil Brownb59e3c02005-09-13 01:25:38 -07003765 lock);
NeilBrown37515172005-07-07 17:59:16 -07003766 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767 goto out;
J. Bruce Fields3a655882006-01-18 17:43:19 -08003768 open_sop = lock->lk_replay_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003769 /* create lockowner and lock stateid */
3770 fp = open_stp->st_file;
3771 strhashval = lock_ownerstr_hashval(fp->fi_inode,
3772 open_sop->so_client->cl_clientid.cl_id,
3773 &lock->v.new.owner);
NeilBrown3e9e3db2005-06-23 22:04:20 -07003774 /* XXX: Do we need to check for duplicate stateowners on
3775 * the same file, or should they just be allowed (and
3776 * create new stateids)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003777 status = nfserr_resource;
Neil Brownb59e3c02005-09-13 01:25:38 -07003778 lock_sop = alloc_init_lock_stateowner(strhashval,
3779 open_sop->so_client, open_stp, lock);
3780 if (lock_sop == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781 goto out;
Neil Brownb59e3c02005-09-13 01:25:38 -07003782 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
J. Bruce Fields8a280512006-01-18 17:43:18 -08003783 if (lock_stp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003784 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785 } else {
3786 /* lock (lock owner + lock stateid) already exists */
Benny Halevydd453df2009-04-03 08:28:41 +03003787 status = nfs4_preprocess_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003788 lock->lk_old_lock_seqid,
3789 &lock->lk_old_lock_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003790 LOCK_STATE,
J. Bruce Fields3a655882006-01-18 17:43:19 -08003791 &lock->lk_replay_owner, &lock_stp, lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792 if (status)
3793 goto out;
J. Bruce Fields3a655882006-01-18 17:43:19 -08003794 lock_sop = lock->lk_replay_owner;
J. Bruce Fields7d947842010-08-20 18:09:31 -04003795 fp = lock_stp->st_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003796 }
J. Bruce Fields3a655882006-01-18 17:43:19 -08003797 /* lock->lk_replay_owner and lock_stp have been created or found */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003798
NeilBrown0dd395d2005-07-07 17:59:15 -07003799 status = nfserr_grace;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003800 if (locks_in_grace() && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07003801 goto out;
3802 status = nfserr_no_grace;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003803 if (!locks_in_grace() && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07003804 goto out;
3805
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806 locks_init_lock(&file_lock);
3807 switch (lock->lk_type) {
3808 case NFS4_READ_LT:
3809 case NFS4_READW_LT:
J. Bruce Fields7d947842010-08-20 18:09:31 -04003810 if (find_readable_file(lock_stp->st_file)) {
3811 nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ);
3812 filp = find_readable_file(lock_stp->st_file);
3813 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003814 file_lock.fl_type = F_RDLCK;
Marc Eshel150b3932007-01-18 16:15:35 -05003815 cmd = F_SETLK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003816 break;
3817 case NFS4_WRITE_LT:
3818 case NFS4_WRITEW_LT:
J. Bruce Fields7d947842010-08-20 18:09:31 -04003819 if (find_writeable_file(lock_stp->st_file)) {
3820 nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE);
3821 filp = find_writeable_file(lock_stp->st_file);
3822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003823 file_lock.fl_type = F_WRLCK;
Marc Eshel150b3932007-01-18 16:15:35 -05003824 cmd = F_SETLK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003825 break;
3826 default:
3827 status = nfserr_inval;
3828 goto out;
3829 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003830 if (!filp) {
3831 status = nfserr_openmode;
3832 goto out;
3833 }
Neil Brownb59e3c02005-09-13 01:25:38 -07003834 file_lock.fl_owner = (fl_owner_t)lock_sop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003835 file_lock.fl_pid = current->tgid;
3836 file_lock.fl_file = filp;
3837 file_lock.fl_flags = FL_POSIX;
NeilBrownd5b90262006-04-10 22:55:22 -07003838 file_lock.fl_lmops = &nfsd_posix_mng_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839
3840 file_lock.fl_start = lock->lk_offset;
Benny Halevy87df4de2008-12-15 19:42:03 +02003841 file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003842 nfs4_transform_lock_offset(&file_lock);
3843
3844 /*
3845 * Try to lock the file in the VFS.
3846 * Note: locks.c uses the BKL to protect the inode's lock list.
3847 */
3848
Marc Eshelfd85b812006-11-28 16:26:41 -05003849 err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07003850 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003851 case 0: /* success! */
3852 update_stateid(&lock_stp->st_stateid);
3853 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
3854 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07003855 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08003856 break;
3857 case (EAGAIN): /* conflock holds conflicting lock */
3858 status = nfserr_denied;
3859 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
3860 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
3861 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003862 case (EDEADLK):
3863 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08003864 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05003866 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08003867 status = nfserr_resource;
3868 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003869 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003870out:
J. Bruce Fields8a280512006-01-18 17:43:18 -08003871 if (status && lock->lk_is_new && lock_sop)
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05003872 release_lockowner(lock_sop);
J. Bruce Fields3a655882006-01-18 17:43:19 -08003873 if (lock->lk_replay_owner) {
3874 nfs4_get_stateowner(lock->lk_replay_owner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003875 cstate->replay_owner = lock->lk_replay_owner;
Neil Brownf2327d92005-09-13 01:25:37 -07003876 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003877 nfs4_unlock_state();
3878 return status;
3879}
3880
3881/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08003882 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
3883 * so we do a temporary open here just to get an open file to pass to
3884 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
3885 * inode operation.)
3886 */
3887static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
3888{
3889 struct file *file;
3890 int err;
3891
3892 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
3893 if (err)
3894 return err;
3895 err = vfs_test_lock(file, lock);
3896 nfsd_close(file);
3897 return err;
3898}
3899
3900/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003901 * LOCKT operation
3902 */
Al Virob37ad282006-10-19 23:28:59 -07003903__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003904nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3905 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003906{
3907 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 struct file_lock file_lock;
Marc Eshelfd85b812006-11-28 16:26:41 -05003909 int error;
Al Virob37ad282006-10-19 23:28:59 -07003910 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003911
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003912 if (locks_in_grace())
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913 return nfserr_grace;
3914
3915 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
3916 return nfserr_inval;
3917
3918 lockt->lt_stateowner = NULL;
3919 nfs4_lock_state();
3920
3921 status = nfserr_stale_clientid;
Andy Adamson60adfc52009-04-03 08:28:50 +03003922 if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003923 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003924
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003925 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
Neil Brown849823c2005-09-13 01:25:36 -07003926 dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003927 if (status == nfserr_symlink)
3928 status = nfserr_inval;
3929 goto out;
3930 }
3931
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003932 inode = cstate->current_fh.fh_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003933 locks_init_lock(&file_lock);
3934 switch (lockt->lt_type) {
3935 case NFS4_READ_LT:
3936 case NFS4_READW_LT:
3937 file_lock.fl_type = F_RDLCK;
3938 break;
3939 case NFS4_WRITE_LT:
3940 case NFS4_WRITEW_LT:
3941 file_lock.fl_type = F_WRLCK;
3942 break;
3943 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04003944 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003945 status = nfserr_inval;
3946 goto out;
3947 }
3948
3949 lockt->lt_stateowner = find_lockstateowner_str(inode,
3950 &lockt->lt_clientid, &lockt->lt_owner);
3951 if (lockt->lt_stateowner)
3952 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
3953 file_lock.fl_pid = current->tgid;
3954 file_lock.fl_flags = FL_POSIX;
3955
3956 file_lock.fl_start = lockt->lt_offset;
Benny Halevy87df4de2008-12-15 19:42:03 +02003957 file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003958
3959 nfs4_transform_lock_offset(&file_lock);
3960
Linus Torvalds1da177e2005-04-16 15:20:36 -07003961 status = nfs_ok;
J. Bruce Fields55ef1272008-12-20 11:58:38 -08003962 error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock);
Marc Eshelfd85b812006-11-28 16:26:41 -05003963 if (error) {
3964 status = nfserrno(error);
3965 goto out;
3966 }
Marc Eshel9d6a8c52007-02-21 00:55:18 -05003967 if (file_lock.fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003968 status = nfserr_denied;
Marc Eshel9d6a8c52007-02-21 00:55:18 -05003969 nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003970 }
3971out:
3972 nfs4_unlock_state();
3973 return status;
3974}
3975
Al Virob37ad282006-10-19 23:28:59 -07003976__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003977nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003978 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003979{
3980 struct nfs4_stateid *stp;
3981 struct file *filp = NULL;
3982 struct file_lock file_lock;
Al Virob37ad282006-10-19 23:28:59 -07003983 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07003984 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003985
3986 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
3987 (long long) locku->lu_offset,
3988 (long long) locku->lu_length);
3989
3990 if (check_lock_length(locku->lu_offset, locku->lu_length))
3991 return nfserr_inval;
3992
3993 nfs4_lock_state();
3994
Benny Halevydd453df2009-04-03 08:28:41 +03003995 if ((status = nfs4_preprocess_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003996 locku->lu_seqid,
3997 &locku->lu_stateid,
J. Bruce Fieldsf3362732008-01-26 14:58:45 -05003998 LOCK_STATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003999 &locku->lu_stateowner, &stp, NULL)))
4000 goto out;
4001
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004002 filp = find_any_file(stp->st_file);
4003 if (!filp) {
4004 status = nfserr_lock_range;
4005 goto out;
4006 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007 BUG_ON(!filp);
4008 locks_init_lock(&file_lock);
4009 file_lock.fl_type = F_UNLCK;
4010 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
4011 file_lock.fl_pid = current->tgid;
4012 file_lock.fl_file = filp;
4013 file_lock.fl_flags = FL_POSIX;
NeilBrownd5b90262006-04-10 22:55:22 -07004014 file_lock.fl_lmops = &nfsd_posix_mng_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004015 file_lock.fl_start = locku->lu_offset;
4016
Benny Halevy87df4de2008-12-15 19:42:03 +02004017 file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 nfs4_transform_lock_offset(&file_lock);
4019
4020 /*
4021 * Try to unlock the file in the VFS.
4022 */
Marc Eshelfd85b812006-11-28 16:26:41 -05004023 err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07004024 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05004025 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026 goto out_nfserr;
4027 }
4028 /*
4029 * OK, unlock succeeded; the only thing left to do is update the stateid.
4030 */
4031 update_stateid(&stp->st_stateid);
4032 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
4033
4034out:
Neil Brownf2327d92005-09-13 01:25:37 -07004035 if (locku->lu_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004036 nfs4_get_stateowner(locku->lu_stateowner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004037 cstate->replay_owner = locku->lu_stateowner;
Neil Brownf2327d92005-09-13 01:25:37 -07004038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004039 nfs4_unlock_state();
4040 return status;
4041
4042out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07004043 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004044 goto out;
4045}
4046
4047/*
4048 * returns
4049 * 1: locks held by lockowner
4050 * 0: no locks held by lockowner
4051 */
4052static int
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004053check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004054{
4055 struct file_lock **flpp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004056 struct inode *inode = filp->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004057 int status = 0;
4058
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004059 lock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004060 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004061 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004062 status = 1;
4063 goto out;
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004064 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004065 }
4066out:
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004067 unlock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004068 return status;
4069}
4070
Al Virob37ad282006-10-19 23:28:59 -07004071__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004072nfsd4_release_lockowner(struct svc_rqst *rqstp,
4073 struct nfsd4_compound_state *cstate,
4074 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075{
4076 clientid_t *clid = &rlockowner->rl_clientid;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004077 struct nfs4_stateowner *sop;
4078 struct nfs4_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004079 struct xdr_netobj *owner = &rlockowner->rl_owner;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004080 struct list_head matches;
4081 int i;
Al Virob37ad282006-10-19 23:28:59 -07004082 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004083
4084 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4085 clid->cl_boot, clid->cl_id);
4086
4087 /* XXX check for lease expiration */
4088
4089 status = nfserr_stale_clientid;
Neil Brown849823c2005-09-13 01:25:36 -07004090 if (STALE_CLIENTID(clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004091 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004092
4093 nfs4_lock_state();
4094
NeilBrown3e9e3db2005-06-23 22:04:20 -07004095 status = nfserr_locks_held;
4096 /* XXX: we're doing a linear search through all the lockowners.
4097 * Yipes! For now we'll just hope clients aren't really using
4098 * release_lockowner much, but eventually we have to fix these
4099 * data structures. */
4100 INIT_LIST_HEAD(&matches);
4101 for (i = 0; i < LOCK_HASH_SIZE; i++) {
4102 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04004103 if (!same_owner_str(sop, owner, clid))
NeilBrown3e9e3db2005-06-23 22:04:20 -07004104 continue;
4105 list_for_each_entry(stp, &sop->so_stateids,
4106 st_perstateowner) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004107 if (check_for_locks(stp->st_file, sop))
NeilBrown3e9e3db2005-06-23 22:04:20 -07004108 goto out;
4109 /* Note: so_perclient unused for lockowners,
4110 * so it's OK to fool with here. */
4111 list_add(&sop->so_perclient, &matches);
4112 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004113 }
NeilBrown3e9e3db2005-06-23 22:04:20 -07004114 }
4115 /* Clients probably won't expect us to return with some (but not all)
4116 * of the lockowner state released; so don't release any until all
4117 * have been checked. */
4118 status = nfs_ok;
NeilBrown0fa822e2005-07-07 17:59:14 -07004119 while (!list_empty(&matches)) {
4120 sop = list_entry(matches.next, struct nfs4_stateowner,
4121 so_perclient);
4122 /* unhash_stateowner deletes so_perclient only
4123 * for openowners. */
4124 list_del(&sop->so_perclient);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05004125 release_lockowner(sop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004126 }
4127out:
4128 nfs4_unlock_state();
4129 return status;
4130}
4131
4132static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07004133alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004134{
NeilBrowna55370a2005-06-23 22:03:52 -07004135 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004136}
4137
NeilBrownc7b9a452005-06-23 22:04:30 -07004138int
Andy Adamsona1bcecd2009-04-03 08:28:05 +03004139nfs4_has_reclaimed_state(const char *name, bool use_exchange_id)
NeilBrownc7b9a452005-06-23 22:04:30 -07004140{
4141 unsigned int strhashval = clientstr_hashval(name);
4142 struct nfs4_client *clp;
4143
J. Bruce Fieldse203d502010-11-24 17:30:54 -05004144 clp = find_confirmed_client_by_str(name, strhashval);
NeilBrownc7b9a452005-06-23 22:04:30 -07004145 return clp ? 1 : 0;
4146}
4147
Linus Torvalds1da177e2005-04-16 15:20:36 -07004148/*
4149 * failure => all reset bets are off, nfserr_no_grace...
4150 */
NeilBrown190e4fb2005-06-23 22:04:25 -07004151int
4152nfs4_client_to_reclaim(const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004153{
4154 unsigned int strhashval;
4155 struct nfs4_client_reclaim *crp = NULL;
4156
NeilBrowna55370a2005-06-23 22:03:52 -07004157 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4158 crp = alloc_reclaim();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004159 if (!crp)
4160 return 0;
NeilBrowna55370a2005-06-23 22:03:52 -07004161 strhashval = clientstr_hashval(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004162 INIT_LIST_HEAD(&crp->cr_strhash);
4163 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07004164 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004165 reclaim_str_hashtbl_size++;
4166 return 1;
4167}
4168
4169static void
4170nfs4_release_reclaim(void)
4171{
4172 struct nfs4_client_reclaim *crp = NULL;
4173 int i;
4174
Linus Torvalds1da177e2005-04-16 15:20:36 -07004175 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4176 while (!list_empty(&reclaim_str_hashtbl[i])) {
4177 crp = list_entry(reclaim_str_hashtbl[i].next,
4178 struct nfs4_client_reclaim, cr_strhash);
4179 list_del(&crp->cr_strhash);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004180 kfree(crp);
4181 reclaim_str_hashtbl_size--;
4182 }
4183 }
4184 BUG_ON(reclaim_str_hashtbl_size);
4185}
4186
4187/*
4188 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
NeilBrownfd39ca92005-06-23 22:04:03 -07004189static struct nfs4_client_reclaim *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190nfs4_find_reclaim_client(clientid_t *clid)
4191{
4192 unsigned int strhashval;
4193 struct nfs4_client *clp;
4194 struct nfs4_client_reclaim *crp = NULL;
4195
4196
4197 /* find clientid in conf_id_hashtbl */
4198 clp = find_confirmed_client(clid);
4199 if (clp == NULL)
4200 return NULL;
4201
NeilBrowna55370a2005-06-23 22:03:52 -07004202 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4203 clp->cl_name.len, clp->cl_name.data,
4204 clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205
4206 /* find clp->cl_name in reclaim_str_hashtbl */
NeilBrowna55370a2005-06-23 22:03:52 -07004207 strhashval = clientstr_hashval(clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004208 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
NeilBrowna55370a2005-06-23 22:03:52 -07004209 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004210 return crp;
4211 }
4212 }
4213 return NULL;
4214}
4215
4216/*
4217* Called from OPEN. Look for clientid in reclaim list.
4218*/
Al Virob37ad282006-10-19 23:28:59 -07004219__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07004220nfs4_check_open_reclaim(clientid_t *clid)
4221{
NeilBrowndfc83562005-06-23 22:03:16 -07004222 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004223}
4224
NeilBrownac4d8ff22005-06-23 22:03:30 -07004225/* initialization to perform at module load time: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004226
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004227int
NeilBrownac4d8ff22005-06-23 22:03:30 -07004228nfs4_state_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004229{
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004230 int i, status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004232 status = nfsd4_init_slabs();
4233 if (status)
4234 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004235 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4236 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
4237 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
4238 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
4239 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
Wang Chen02cb2852009-04-24 15:41:57 +08004240 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004241 }
Marc Eshel5282fd72009-04-03 08:27:52 +03004242 for (i = 0; i < SESSION_HASH_SIZE; i++)
4243 INIT_LIST_HEAD(&sessionid_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004244 for (i = 0; i < FILE_HASH_SIZE; i++) {
4245 INIT_LIST_HEAD(&file_hashtbl[i]);
4246 }
4247 for (i = 0; i < OWNER_HASH_SIZE; i++) {
4248 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
4249 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
4250 }
4251 for (i = 0; i < STATEID_HASH_SIZE; i++) {
4252 INIT_LIST_HEAD(&stateid_hashtbl[i]);
4253 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
4254 }
4255 for (i = 0; i < LOCK_HASH_SIZE; i++) {
4256 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
4257 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
4258 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004259 memset(&onestateid, ~0, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004260 INIT_LIST_HEAD(&close_lru);
4261 INIT_LIST_HEAD(&client_lru);
4262 INIT_LIST_HEAD(&del_recall_lru);
NeilBrownac4d8ff22005-06-23 22:03:30 -07004263 reclaim_str_hashtbl_size = 0;
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004264 return 0;
NeilBrownac4d8ff22005-06-23 22:03:30 -07004265}
4266
NeilBrown190e4fb2005-06-23 22:04:25 -07004267static void
4268nfsd4_load_reboot_recovery_data(void)
4269{
4270 int status;
4271
NeilBrown0964a3d2005-06-23 22:04:32 -07004272 nfs4_lock_state();
4273 nfsd4_init_recdir(user_recovery_dirname);
NeilBrown190e4fb2005-06-23 22:04:25 -07004274 status = nfsd4_recdir_load();
NeilBrown0964a3d2005-06-23 22:04:32 -07004275 nfs4_unlock_state();
NeilBrown190e4fb2005-06-23 22:04:25 -07004276 if (status)
4277 printk("NFSD: Failure reading reboot recovery data\n");
4278}
4279
Meelap Shahc2f1a552007-07-17 04:04:39 -07004280/*
4281 * Since the lifetime of a delegation isn't limited to that of an open, a
4282 * client may quite reasonably hang on to a delegation as long as it has
4283 * the inode cached. This becomes an obvious problem the first time a
4284 * client's inode cache approaches the size of the server's total memory.
4285 *
4286 * For now we avoid this problem by imposing a hard limit on the number
4287 * of delegations, which varies according to the server's memory size.
4288 */
4289static void
4290set_max_delegations(void)
4291{
4292 /*
4293 * Allow at most 4 delegations per megabyte of RAM. Quick
4294 * estimates suggest that in the worst case (where every delegation
4295 * is for a different inode), a delegation could take about 1.5K,
4296 * giving a worst case usage of about 6% of memory.
4297 */
4298 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
4299}
4300
NeilBrownac4d8ff22005-06-23 22:03:30 -07004301/* initialization to perform when the nfsd service is started: */
4302
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004303static int
NeilBrownac4d8ff22005-06-23 22:03:30 -07004304__nfs4_state_start(void)
4305{
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004306 int ret;
4307
Linus Torvalds1da177e2005-04-16 15:20:36 -07004308 boot_time = get_seconds();
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04004309 locks_start_grace(&nfsd4_manager);
Marc Eshel9a8db972007-07-17 04:04:35 -07004310 printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004311 nfsd4_grace);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004312 ret = set_callback_cred();
4313 if (ret)
4314 return -ENOMEM;
NeilBrown58da2822005-06-23 22:03:19 -07004315 laundry_wq = create_singlethread_workqueue("nfsd4");
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004316 if (laundry_wq == NULL)
4317 return -ENOMEM;
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004318 ret = nfsd4_create_callback_queue();
4319 if (ret)
4320 goto out_free_laundry;
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004321 queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
Meelap Shahc2f1a552007-07-17 04:04:39 -07004322 set_max_delegations();
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004323 return 0;
4324out_free_laundry:
4325 destroy_workqueue(laundry_wq);
4326 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004327}
4328
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004329int
NeilBrown76a35502005-06-23 22:03:26 -07004330nfs4_state_start(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331{
NeilBrown190e4fb2005-06-23 22:04:25 -07004332 nfsd4_load_reboot_recovery_data();
Jeff Layton4ad9a342010-07-19 16:50:04 -04004333 return __nfs4_state_start();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004334}
4335
Linus Torvalds1da177e2005-04-16 15:20:36 -07004336static void
4337__nfs4_state_shutdown(void)
4338{
4339 int i;
4340 struct nfs4_client *clp = NULL;
4341 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004342 struct list_head *pos, *next, reaplist;
4343
Linus Torvalds1da177e2005-04-16 15:20:36 -07004344 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4345 while (!list_empty(&conf_id_hashtbl[i])) {
4346 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
4347 expire_client(clp);
4348 }
4349 while (!list_empty(&unconf_str_hashtbl[i])) {
4350 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
4351 expire_client(clp);
4352 }
4353 }
4354 INIT_LIST_HEAD(&reaplist);
4355 spin_lock(&recall_lock);
4356 list_for_each_safe(pos, next, &del_recall_lru) {
4357 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4358 list_move(&dp->dl_recall_lru, &reaplist);
4359 }
4360 spin_unlock(&recall_lock);
4361 list_for_each_safe(pos, next, &reaplist) {
4362 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4363 list_del_init(&dp->dl_recall_lru);
4364 unhash_delegation(dp);
4365 }
4366
NeilBrown190e4fb2005-06-23 22:04:25 -07004367 nfsd4_shutdown_recdir();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368}
4369
4370void
4371nfs4_state_shutdown(void)
4372{
NeilBrown5e8d5c22006-04-10 22:55:37 -07004373 cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
4374 destroy_workqueue(laundry_wq);
J. Bruce Fields2c5e7612008-11-20 14:36:17 -06004375 locks_end_grace(&nfsd4_manager);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376 nfs4_lock_state();
4377 nfs4_release_reclaim();
4378 __nfs4_state_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004379 nfs4_unlock_state();
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04004380 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004381}
4382
Jeff Layton3dd98a32008-06-10 08:40:36 -04004383/*
4384 * user_recovery_dirname is protected by the nfsd_mutex since it's only
4385 * accessed when nfsd is starting.
4386 */
NeilBrown0964a3d2005-06-23 22:04:32 -07004387static void
4388nfs4_set_recdir(char *recdir)
4389{
NeilBrown0964a3d2005-06-23 22:04:32 -07004390 strcpy(user_recovery_dirname, recdir);
NeilBrown0964a3d2005-06-23 22:04:32 -07004391}
4392
4393/*
4394 * Change the NFSv4 recovery directory to recdir.
4395 */
4396int
4397nfs4_reset_recoverydir(char *recdir)
4398{
4399 int status;
Al Viroa63bb992008-08-02 01:03:36 -04004400 struct path path;
NeilBrown0964a3d2005-06-23 22:04:32 -07004401
Al Viroa63bb992008-08-02 01:03:36 -04004402 status = kern_path(recdir, LOOKUP_FOLLOW, &path);
NeilBrown0964a3d2005-06-23 22:04:32 -07004403 if (status)
4404 return status;
4405 status = -ENOTDIR;
Al Viroa63bb992008-08-02 01:03:36 -04004406 if (S_ISDIR(path.dentry->d_inode->i_mode)) {
NeilBrown0964a3d2005-06-23 22:04:32 -07004407 nfs4_set_recdir(recdir);
4408 status = 0;
4409 }
Al Viroa63bb992008-08-02 01:03:36 -04004410 path_put(&path);
NeilBrown0964a3d2005-06-23 22:04:32 -07004411 return status;
4412}
4413
Jeff Layton3dd98a32008-06-10 08:40:36 -04004414char *
4415nfs4_recoverydir(void)
4416{
4417 return user_recovery_dirname;
4418}