blob: e5197d947b9e6961657d5c93642ea6ad05518eee [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002* Copyright (c) 2001 The Regents of the University of Michigan.
3* All rights reserved.
4*
5* Kendrick Smith <kmsmith@umich.edu>
6* Andy Adamson <kandros@umich.edu>
7*
8* Redistribution and use in source and binary forms, with or without
9* modification, are permitted provided that the following conditions
10* are met:
11*
12* 1. Redistributions of source code must retain the above copyright
13* notice, this list of conditions and the following disclaimer.
14* 2. Redistributions in binary form must reproduce the above copyright
15* notice, this list of conditions and the following disclaimer in the
16* documentation and/or other materials provided with the distribution.
17* 3. Neither the name of the University nor the names of its
18* contributors may be used to endorse or promote products derived
19* from this software without specific prior written permission.
20*
21* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32*
33*/
34
Dave Hansenaceaf782008-02-15 14:37:31 -080035#include <linux/file.h>
Arnd Bergmannb89f4322010-09-18 15:09:31 +020036#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
NeilBrown0964a3d2005-06-23 22:04:32 -070038#include <linux/namei.h>
Meelap Shahc2f1a552007-07-17 04:04:39 -070039#include <linux/swap.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040040#include <linux/pagemap.h>
Chuck Lever7df302f2012-05-29 13:56:37 -040041#include <linux/ratelimit.h>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050042#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton59766872013-02-04 12:50:00 -050043#include <linux/sunrpc/addr.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020044#include "xdr4.h"
J. Bruce Fields06b332a2013-04-09 11:34:36 -040045#include "xdr4cb.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050046#include "vfs.h"
J. Bruce Fieldsbfa4b362012-04-25 16:49:18 -040047#include "current_stateid.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040049#include "netns.h"
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define NFSDDBG_FACILITY NFSDDBG_PROC
52
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050053#define all_ones {{~0,~0},~0}
54static const stateid_t one_stateid = {
55 .si_generation = ~0,
56 .si_opaque = all_ones,
57};
58static const stateid_t zero_stateid = {
59 /* all fields zero */
60};
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010061static const stateid_t currentstateid = {
62 .si_generation = 1,
63};
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050064
Andy Adamsonec6b5d72009-04-03 08:28:28 +030065static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070066
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050067#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
68#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010069#define CURRENT_STATEID(stateid) (!memcmp((stateid), &currentstateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/* forward declarations */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -040072static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
J. Bruce Fields8b671b82009-02-22 14:51:34 -080074/* Locking: */
75
76/* Currently used for almost all code touching nfsv4 state: */
Ingo Molnar353ab6e2006-03-26 01:37:12 -080077static DEFINE_MUTEX(client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
J. Bruce Fields8b671b82009-02-22 14:51:34 -080079/*
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
83 */
Benny Halevycdc97502014-05-30 09:09:30 -040084static DEFINE_SPINLOCK(state_lock);
J. Bruce Fields8b671b82009-02-22 14:51:34 -080085
Christoph Hellwigabf11352014-05-21 07:43:03 -070086static struct kmem_cache *openowner_slab;
87static struct kmem_cache *lockowner_slab;
88static struct kmem_cache *file_slab;
89static struct kmem_cache *stateid_slab;
90static struct kmem_cache *deleg_slab;
NeilBrowne60d4392005-06-23 22:03:01 -070091
Linus Torvalds1da177e2005-04-16 15:20:36 -070092void
93nfs4_lock_state(void)
94{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080095 mutex_lock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -040098static void free_session(struct nfsd4_session *);
Benny Halevy508dc6e2012-02-23 17:40:52 -080099
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400100static bool is_session_dead(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -0800101{
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400102 return ses->se_flags & NFS4_SESSION_DEAD;
103}
104
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -0400105void nfsd4_put_session(struct nfsd4_session *ses)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400106{
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -0400107 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
108 free_session(ses);
109}
110
111static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
112{
113 if (atomic_read(&ses->se_ref) > ref_held_by_me)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400114 return nfserr_jukebox;
115 ses->se_flags |= NFS4_SESSION_DEAD;
116 return nfs_ok;
117}
118
119static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
120{
121 if (is_session_dead(ses))
122 return nfserr_badsession;
123 atomic_inc(&ses->se_ref);
124 return nfs_ok;
Benny Halevy508dc6e2012-02-23 17:40:52 -0800125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127void
128nfs4_unlock_state(void)
129{
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800130 mutex_unlock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
J. Bruce Fields221a6872013-04-01 22:23:49 -0400133static bool is_client_expired(struct nfs4_client *clp)
134{
135 return clp->cl_time == 0;
136}
137
138static __be32 mark_client_expired_locked(struct nfs4_client *clp)
139{
140 if (atomic_read(&clp->cl_refcount))
141 return nfserr_jukebox;
142 clp->cl_time = 0;
143 return nfs_ok;
144}
145
146static __be32 mark_client_expired(struct nfs4_client *clp)
147{
148 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
149 __be32 ret;
150
151 spin_lock(&nn->client_lock);
152 ret = mark_client_expired_locked(clp);
153 spin_unlock(&nn->client_lock);
154 return ret;
155}
156
157static __be32 get_client_locked(struct nfs4_client *clp)
158{
159 if (is_client_expired(clp))
160 return nfserr_expired;
161 atomic_inc(&clp->cl_refcount);
162 return nfs_ok;
163}
164
165/* must be called under the client_lock */
166static inline void
167renew_client_locked(struct nfs4_client *clp)
168{
169 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
170
171 if (is_client_expired(clp)) {
172 WARN_ON(1);
173 printk("%s: client (clientid %08x/%08x) already expired\n",
174 __func__,
175 clp->cl_clientid.cl_boot,
176 clp->cl_clientid.cl_id);
177 return;
178 }
179
180 dprintk("renewing client (clientid %08x/%08x)\n",
181 clp->cl_clientid.cl_boot,
182 clp->cl_clientid.cl_id);
183 list_move_tail(&clp->cl_lru, &nn->client_lru);
184 clp->cl_time = get_seconds();
185}
186
187static inline void
188renew_client(struct nfs4_client *clp)
189{
190 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
191
192 spin_lock(&nn->client_lock);
193 renew_client_locked(clp);
194 spin_unlock(&nn->client_lock);
195}
196
Fengguang Wuba138432013-04-16 22:14:15 -0400197static void put_client_renew_locked(struct nfs4_client *clp)
J. Bruce Fields221a6872013-04-01 22:23:49 -0400198{
199 if (!atomic_dec_and_test(&clp->cl_refcount))
200 return;
201 if (!is_client_expired(clp))
202 renew_client_locked(clp);
203}
204
205void put_client_renew(struct nfs4_client *clp)
206{
207 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
208
209 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
210 return;
211 if (!is_client_expired(clp))
212 renew_client_locked(clp);
213 spin_unlock(&nn->client_lock);
214}
215
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217static inline u32
218opaque_hashval(const void *ptr, int nbytes)
219{
220 unsigned char *cptr = (unsigned char *) ptr;
221
222 u32 x = 0;
223 while (nbytes--) {
224 x *= 37;
225 x += *cptr++;
226 }
227 return x;
228}
229
J. Bruce Fields32513b42011-10-13 16:00:16 -0400230static void nfsd4_free_file(struct nfs4_file *f)
231{
232 kmem_cache_free(file_slab, f);
233}
234
NeilBrown13cd2182005-06-23 22:03:10 -0700235static inline void
236put_nfs4_file(struct nfs4_file *fi)
237{
Benny Halevycdc97502014-05-30 09:09:30 -0400238 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
Jeff Layton89876f82013-04-02 09:01:59 -0400239 hlist_del(&fi->fi_hash);
Benny Halevycdc97502014-05-30 09:09:30 -0400240 spin_unlock(&state_lock);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800241 iput(fi->fi_inode);
J. Bruce Fields32513b42011-10-13 16:00:16 -0400242 nfsd4_free_file(fi);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800243 }
NeilBrown13cd2182005-06-23 22:03:10 -0700244}
245
246static inline void
247get_nfs4_file(struct nfs4_file *fi)
248{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800249 atomic_inc(&fi->fi_ref);
NeilBrown13cd2182005-06-23 22:03:10 -0700250}
251
NeilBrownef0f3392006-04-10 22:55:41 -0700252static int num_delegations;
Zhang Yanfei697ce9b2013-02-22 16:35:47 -0800253unsigned long max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700254
255/*
256 * Open owner state (share locks)
257 */
258
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500259/* hash tables for lock and open owners */
260#define OWNER_HASH_BITS 8
261#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
262#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
NeilBrownef0f3392006-04-10 22:55:41 -0700263
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500264static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400265{
266 unsigned int ret;
267
268 ret = opaque_hashval(ownername->data, ownername->len);
269 ret += clientid;
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500270 return ret & OWNER_HASH_MASK;
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400271}
NeilBrownef0f3392006-04-10 22:55:41 -0700272
NeilBrownef0f3392006-04-10 22:55:41 -0700273/* hash table for nfs4_file */
274#define FILE_HASH_BITS 8
275#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
Shan Wei35079582011-01-14 17:35:59 +0800276
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400277static unsigned int file_hashval(struct inode *ino)
278{
279 /* XXX: why are we hashing on inode pointer, anyway? */
280 return hash_ptr(ino, FILE_HASH_BITS);
281}
282
Jeff Layton89876f82013-04-02 09:01:59 -0400283static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700284
J. Bruce Fields34775652013-08-23 17:55:18 -0400285static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
286{
287 WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
288 atomic_inc(&fp->fi_access[oflag]);
289}
290
J. Bruce Fields998db522010-08-07 09:21:41 -0400291static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
292{
293 if (oflag == O_RDWR) {
J. Bruce Fields34775652013-08-23 17:55:18 -0400294 __nfs4_file_get_access(fp, O_RDONLY);
295 __nfs4_file_get_access(fp, O_WRONLY);
J. Bruce Fields998db522010-08-07 09:21:41 -0400296 } else
J. Bruce Fields34775652013-08-23 17:55:18 -0400297 __nfs4_file_get_access(fp, oflag);
J. Bruce Fields998db522010-08-07 09:21:41 -0400298}
299
300static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400301{
302 if (fp->fi_fds[oflag]) {
303 fput(fp->fi_fds[oflag]);
304 fp->fi_fds[oflag] = NULL;
305 }
306}
307
J. Bruce Fields998db522010-08-07 09:21:41 -0400308static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400309{
310 if (atomic_dec_and_test(&fp->fi_access[oflag])) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400311 nfs4_file_put_fd(fp, oflag);
J. Bruce Fields0c7c3e62013-03-28 20:37:14 -0400312 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
J. Bruce Fields3d02fa22011-09-19 15:07:41 -0400313 nfs4_file_put_fd(fp, O_RDWR);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400314 }
315}
316
J. Bruce Fields998db522010-08-07 09:21:41 -0400317static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
318{
319 if (oflag == O_RDWR) {
320 __nfs4_file_put_access(fp, O_RDONLY);
321 __nfs4_file_put_access(fp, O_WRONLY);
322 } else
323 __nfs4_file_put_access(fp, oflag);
324}
325
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500326static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
327kmem_cache *slab)
J. Bruce Fields996e0932011-10-17 11:14:48 -0400328{
329 struct idr *stateids = &cl->cl_stateids;
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500330 struct nfs4_stid *stid;
331 int new_id;
332
333 stid = kmem_cache_alloc(slab, GFP_KERNEL);
334 if (!stid)
335 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400336
Jeff Layton398c33a2013-04-29 16:21:20 -0700337 new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL);
Tejun Heoebd6c702013-03-13 14:59:37 -0700338 if (new_id < 0)
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500339 goto out_free;
340 stid->sc_client = cl;
341 stid->sc_type = 0;
342 stid->sc_stateid.si_opaque.so_id = new_id;
343 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
344 /* Will be incremented before return to client: */
345 stid->sc_stateid.si_generation = 0;
346
J. Bruce Fields996e0932011-10-17 11:14:48 -0400347 /*
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500348 * It shouldn't be a problem to reuse an opaque stateid value.
349 * I don't think it is for 4.1. But with 4.0 I worry that, for
350 * example, a stray write retransmission could be accepted by
351 * the server when it should have been rejected. Therefore,
352 * adopt a trick from the sctp code to attempt to maximize the
353 * amount of time until an id is reused, by ensuring they always
354 * "increase" (mod INT_MAX):
J. Bruce Fields996e0932011-10-17 11:14:48 -0400355 */
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500356 return stid;
357out_free:
Wei Yongjun2c44a232013-04-09 14:15:31 +0800358 kmem_cache_free(slab, stid);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500359 return NULL;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400360}
361
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400362static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
363{
364 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367static struct nfs4_delegation *
J. Bruce Fields99c41512013-05-21 16:21:25 -0400368alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369{
370 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 dprintk("NFSD alloc_init_deleg\n");
Meelap Shahc2f1a552007-07-17 04:04:39 -0700373 if (num_delegations > max_delegations)
NeilBrownef0f3392006-04-10 22:55:41 -0700374 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400375 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
NeilBrown5b2d21c2005-06-23 22:03:04 -0700376 if (dp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 return dp;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400378 /*
379 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400380 * meaning of seqid 0 isn't meaningful, really, but let's avoid
381 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400382 */
383 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownef0f3392006-04-10 22:55:41 -0700384 num_delegations++;
NeilBrownea1da632005-06-23 22:04:17 -0700385 INIT_LIST_HEAD(&dp->dl_perfile);
386 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 INIT_LIST_HEAD(&dp->dl_recall_lru);
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -0400388 dp->dl_file = NULL;
J. Bruce Fields99c41512013-05-21 16:21:25 -0400389 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
J. Bruce Fields6c02eaa2009-02-02 17:30:51 -0500390 fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 dp->dl_time = 0;
392 atomic_set(&dp->dl_count, 1);
J. Bruce Fields57725152012-11-05 15:10:26 -0500393 nfsd4_init_callback(&dp->dl_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return dp;
395}
396
J. Bruce Fields68a33962013-03-21 11:21:50 -0400397static void remove_stid(struct nfs4_stid *s)
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500398{
399 struct idr *stateids = &s->sc_client->cl_stateids;
400
401 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500402}
403
Benny Halevy9857df82013-10-14 13:44:52 +0300404static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
405{
406 kmem_cache_free(slab, s);
407}
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409void
410nfs4_put_delegation(struct nfs4_delegation *dp)
411{
412 if (atomic_dec_and_test(&dp->dl_count)) {
Benny Halevy9857df82013-10-14 13:44:52 +0300413 nfs4_free_stid(deleg_slab, &dp->dl_stid);
NeilBrownef0f3392006-04-10 22:55:41 -0700414 num_delegations--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416}
417
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500418static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419{
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -0500420 if (!fp->fi_lease)
421 return;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500422 if (atomic_dec_and_test(&fp->fi_delegees)) {
423 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
424 fp->fi_lease = NULL;
J. Bruce Fields4ee63622011-04-15 18:08:26 -0400425 fput(fp->fi_deleg_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500426 fp->fi_deleg_file = NULL;
427 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428}
429
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400430static void unhash_stid(struct nfs4_stid *s)
431{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500432 s->sc_type = 0;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400433}
434
Benny Halevy931ee562014-05-30 09:09:27 -0400435static void
436hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
437{
Benny Halevycdc97502014-05-30 09:09:30 -0400438 lockdep_assert_held(&state_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400439
Benny Halevy3fb87d12014-05-30 09:09:31 -0400440 dp->dl_stid.sc_type = NFS4_DELEG_STID;
Benny Halevy931ee562014-05-30 09:09:27 -0400441 list_add(&dp->dl_perfile, &fp->fi_delegations);
442 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
443}
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445/* Called under the state lock. */
446static void
447unhash_delegation(struct nfs4_delegation *dp)
448{
Benny Halevycdc97502014-05-30 09:09:30 -0400449 spin_lock(&state_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400450 list_del_init(&dp->dl_perclnt);
J. Bruce Fields5d926e82011-02-07 16:53:46 -0500451 list_del_init(&dp->dl_perfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 list_del_init(&dp->dl_recall_lru);
Benny Halevycdc97502014-05-30 09:09:30 -0400453 spin_unlock(&state_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -0500454 if (dp->dl_file) {
455 nfs4_put_deleg_lease(dp->dl_file);
456 put_nfs4_file(dp->dl_file);
457 dp->dl_file = NULL;
458 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400459}
460
461
462
463static void destroy_revoked_delegation(struct nfs4_delegation *dp)
464{
465 list_del_init(&dp->dl_recall_lru);
J. Bruce Fields68a33962013-03-21 11:21:50 -0400466 remove_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 nfs4_put_delegation(dp);
468}
469
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400470static void destroy_delegation(struct nfs4_delegation *dp)
471{
472 unhash_delegation(dp);
473 remove_stid(&dp->dl_stid);
474 nfs4_put_delegation(dp);
475}
476
477static void revoke_delegation(struct nfs4_delegation *dp)
478{
479 struct nfs4_client *clp = dp->dl_stid.sc_client;
480
481 if (clp->cl_minorversion == 0)
482 destroy_delegation(dp);
483 else {
484 unhash_delegation(dp);
485 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
486 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
487 }
488}
489
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490/*
491 * SETCLIENTID state
492 */
493
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400494static unsigned int clientid_hashval(u32 id)
495{
496 return id & CLIENT_HASH_MASK;
497}
498
499static unsigned int clientstr_hashval(const char *name)
500{
501 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
502}
503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504/*
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400505 * We store the NONE, READ, WRITE, and BOTH bits separately in the
506 * st_{access,deny}_bmap field of the stateid, in order to track not
507 * only what share bits are currently in force, but also what
508 * combinations of share bits previous opens have used. This allows us
509 * to enforce the recommendation of rfc 3530 14.2.19 that the server
510 * return an error if the client attempt to downgrade to a combination
511 * of share bits not explicable by closing some of its previous opens.
512 *
513 * XXX: This enforcement is actually incomplete, since we don't keep
514 * track of access/deny bit combinations; so, e.g., we allow:
515 *
516 * OPEN allow read, deny write
517 * OPEN allow both, deny none
518 * DOWNGRADE allow read, deny none
519 *
520 * which we should reject.
521 */
Jeff Layton5ae037e2012-05-11 09:45:11 -0400522static unsigned int
523bmap_to_share_mode(unsigned long bmap) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400524 int i;
Jeff Layton5ae037e2012-05-11 09:45:11 -0400525 unsigned int access = 0;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400526
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400527 for (i = 1; i < 4; i++) {
528 if (test_bit(i, &bmap))
Jeff Layton5ae037e2012-05-11 09:45:11 -0400529 access |= i;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400530 }
Jeff Layton5ae037e2012-05-11 09:45:11 -0400531 return access;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400532}
533
Jeff Layton3a328612012-05-11 09:45:12 -0400534static bool
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400535test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400536 unsigned int access, deny;
537
Jeff Layton5ae037e2012-05-11 09:45:11 -0400538 access = bmap_to_share_mode(stp->st_access_bmap);
539 deny = bmap_to_share_mode(stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400540 if ((access & open->op_share_deny) || (deny & open->op_share_access))
Jeff Layton3a328612012-05-11 09:45:12 -0400541 return false;
542 return true;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400543}
544
Jeff Layton82c5ff12012-05-11 09:45:13 -0400545/* set share access for a given stateid */
546static inline void
547set_access(u32 access, struct nfs4_ol_stateid *stp)
548{
549 __set_bit(access, &stp->st_access_bmap);
550}
551
552/* clear share access for a given stateid */
553static inline void
554clear_access(u32 access, struct nfs4_ol_stateid *stp)
555{
556 __clear_bit(access, &stp->st_access_bmap);
557}
558
559/* test whether a given stateid has access */
560static inline bool
561test_access(u32 access, struct nfs4_ol_stateid *stp)
562{
563 return test_bit(access, &stp->st_access_bmap);
564}
565
Jeff Laytonce0fc432012-05-11 09:45:14 -0400566/* set share deny for a given stateid */
567static inline void
568set_deny(u32 access, struct nfs4_ol_stateid *stp)
569{
570 __set_bit(access, &stp->st_deny_bmap);
571}
572
573/* clear share deny for a given stateid */
574static inline void
575clear_deny(u32 access, struct nfs4_ol_stateid *stp)
576{
577 __clear_bit(access, &stp->st_deny_bmap);
578}
579
580/* test whether a given stateid is denying specific access */
581static inline bool
582test_deny(u32 access, struct nfs4_ol_stateid *stp)
583{
584 return test_bit(access, &stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400585}
586
587static int nfs4_access_to_omode(u32 access)
588{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400589 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400590 case NFS4_SHARE_ACCESS_READ:
591 return O_RDONLY;
592 case NFS4_SHARE_ACCESS_WRITE:
593 return O_WRONLY;
594 case NFS4_SHARE_ACCESS_BOTH:
595 return O_RDWR;
596 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -0500597 WARN_ON_ONCE(1);
598 return O_RDONLY;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400599}
600
Jeff Layton82c5ff12012-05-11 09:45:13 -0400601/* release all access and file references for a given stateid */
602static void
603release_all_access(struct nfs4_ol_stateid *stp)
604{
605 int i;
606
607 for (i = 1; i < 4; i++) {
608 if (test_access(i, stp))
609 nfs4_file_put_access(stp->st_file,
610 nfs4_access_to_omode(i));
611 clear_access(i, stp);
612 }
613}
614
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400615static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500616{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500617 list_del(&stp->st_perfile);
618 list_del(&stp->st_perstateowner);
619}
620
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400621static void close_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500622{
Jeff Layton82c5ff12012-05-11 09:45:13 -0400623 release_all_access(stp);
OGAWA Hirofumia96e5b92011-04-18 11:48:55 -0400624 put_nfs4_file(stp->st_file);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400625 stp->st_file = NULL;
626}
627
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400628static void free_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400629{
J. Bruce Fields68a33962013-03-21 11:21:50 -0400630 remove_stid(&stp->st_stid);
Benny Halevy9857df82013-10-14 13:44:52 +0300631 nfs4_free_stid(stateid_slab, &stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500632}
633
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400634static void release_lock_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500635{
636 struct file *file;
637
638 unhash_generic_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400639 unhash_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500640 file = find_any_file(stp->st_file);
641 if (file)
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400642 locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400643 close_generic_stateid(stp);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500644 free_generic_stateid(stp);
645}
646
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400647static void unhash_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500648{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400649 struct nfs4_ol_stateid *stp;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500650
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400651 list_del(&lo->lo_owner.so_strhash);
652 list_del(&lo->lo_perstateid);
J. Bruce Fields009673b2011-11-07 17:40:10 -0500653 list_del(&lo->lo_owner_ino_hash);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400654 while (!list_empty(&lo->lo_owner.so_stateids)) {
655 stp = list_first_entry(&lo->lo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400656 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500657 release_lock_stateid(stp);
658 }
659}
660
Trond Myklebust50cc6232014-04-18 14:44:03 -0400661static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
662{
663 kfree(lo->lo_owner.so_owner.data);
664 kmem_cache_free(lockowner_slab, lo);
665}
666
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400667static void release_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500668{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400669 unhash_lockowner(lo);
670 nfs4_free_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500671}
672
673static void
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400674release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500675{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400676 struct nfs4_lockowner *lo;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500677
678 while (!list_empty(&open_stp->st_lockowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400679 lo = list_entry(open_stp->st_lockowners.next,
680 struct nfs4_lockowner, lo_perstateid);
681 release_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500682 }
683}
684
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400685static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields22839632009-01-11 14:27:17 -0500686{
687 unhash_generic_stateid(stp);
688 release_stateid_lockowners(stp);
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400689 close_generic_stateid(stp);
690}
691
692static void release_open_stateid(struct nfs4_ol_stateid *stp)
693{
694 unhash_open_stateid(stp);
J. Bruce Fields22839632009-01-11 14:27:17 -0500695 free_generic_stateid(stp);
696}
697
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400698static void unhash_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500699{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400700 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500701
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400702 list_del(&oo->oo_owner.so_strhash);
703 list_del(&oo->oo_perclient);
704 while (!list_empty(&oo->oo_owner.so_stateids)) {
705 stp = list_first_entry(&oo->oo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400706 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500707 release_open_stateid(stp);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500708 }
709}
710
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400711static void release_last_closed_stateid(struct nfs4_openowner *oo)
712{
713 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
714
715 if (s) {
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400716 free_generic_stateid(s);
717 oo->oo_last_closed_stid = NULL;
718 }
719}
720
Trond Myklebust50cc6232014-04-18 14:44:03 -0400721static void nfs4_free_openowner(struct nfs4_openowner *oo)
722{
723 kfree(oo->oo_owner.so_owner.data);
724 kmem_cache_free(openowner_slab, oo);
725}
726
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400727static void release_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500728{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400729 unhash_openowner(oo);
730 list_del(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400731 release_last_closed_stateid(oo);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400732 nfs4_free_openowner(oo);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500733}
734
Marc Eshel5282fd72009-04-03 08:27:52 +0300735static inline int
736hash_sessionid(struct nfs4_sessionid *sessionid)
737{
738 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
739
740 return sid->sequence % SESSION_HASH_SIZE;
741}
742
Trond Myklebust8f199b82012-03-20 15:11:17 -0400743#ifdef NFSD_DEBUG
Marc Eshel5282fd72009-04-03 08:27:52 +0300744static inline void
745dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
746{
747 u32 *ptr = (u32 *)(&sessionid->data[0]);
748 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
749}
Trond Myklebust8f199b82012-03-20 15:11:17 -0400750#else
751static inline void
752dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
753{
754}
755#endif
756
J. Bruce Fields9411b1d2013-04-01 16:37:12 -0400757/*
758 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
759 * won't be used for replay.
760 */
761void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
762{
763 struct nfs4_stateowner *so = cstate->replay_owner;
764
765 if (nfserr == nfserr_replay_me)
766 return;
767
768 if (!seqid_mutating_err(ntohl(nfserr))) {
769 cstate->replay_owner = NULL;
770 return;
771 }
772 if (!so)
773 return;
774 if (so->so_is_open_owner)
775 release_last_closed_stateid(openowner(so));
776 so->so_seqid++;
777 return;
778}
Marc Eshel5282fd72009-04-03 08:27:52 +0300779
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300780static void
781gen_sessionid(struct nfsd4_session *ses)
782{
783 struct nfs4_client *clp = ses->se_client;
784 struct nfsd4_sessionid *sid;
785
786 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
787 sid->clientid = clp->cl_clientid;
788 sid->sequence = current_sessionid++;
789 sid->reserved = 0;
790}
791
792/*
Andy Adamsona6496372009-08-28 08:45:01 -0400793 * The protocol defines ca_maxresponssize_cached to include the size of
794 * the rpc header, but all we need to cache is the data starting after
795 * the end of the initial SEQUENCE operation--the rest we regenerate
796 * each time. Therefore we can advertise a ca_maxresponssize_cached
797 * value that is the number of bytes in our cache plus a few additional
798 * bytes. In order to stay on the safe side, and not promise more than
799 * we can cache, those additional bytes must be the minimum possible: 24
800 * bytes of rpc header (xid through accept state, with AUTH_NULL
801 * verifier), 12 for the compound header (with zero-length tag), and 44
802 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300803 */
Andy Adamsona6496372009-08-28 08:45:01 -0400804#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
805
Andy Adamson557ce262009-08-28 08:45:04 -0400806static void
807free_session_slots(struct nfsd4_session *ses)
808{
809 int i;
810
811 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
812 kfree(ses->se_slots[i]);
813}
814
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400815/*
816 * We don't actually need to cache the rpc and session headers, so we
817 * can allocate a little less for each slot:
818 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400819static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400820{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400821 u32 size;
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400822
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400823 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
824 size = 0;
825 else
826 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
827 return size + sizeof(struct nfsd4_slot);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400828}
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300829
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400830/*
831 * XXX: If we run out of reserved DRC memory we could (up to a point)
832 * re-negotiate active sessions and reduce their slot usage to make
Justin P. Mattock42b2aa82011-11-28 20:31:00 -0800833 * room for new connections. For now we just fail the create session.
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400834 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400835static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400836{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400837 u32 slotsize = slot_bytes(ca);
838 u32 num = ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400839 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300840
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400841 spin_lock(&nfsd_drc_lock);
Zhang Yanfei697ce9b2013-02-22 16:35:47 -0800842 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
843 nfsd_drc_max_mem - nfsd_drc_mem_used);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400844 num = min_t(int, num, avail / slotsize);
845 nfsd_drc_mem_used += num * slotsize;
846 spin_unlock(&nfsd_drc_lock);
847
848 return num;
849}
850
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400851static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400852{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400853 int slotsize = slot_bytes(ca);
854
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400855 spin_lock(&nfsd_drc_lock);
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400856 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400857 spin_unlock(&nfsd_drc_lock);
858}
859
Kinglong Mee60810e52014-01-01 00:35:47 +0800860static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
861 struct nfsd4_channel_attrs *battrs)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400862{
Kinglong Mee60810e52014-01-01 00:35:47 +0800863 int numslots = fattrs->maxreqs;
864 int slotsize = slot_bytes(fattrs);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400865 struct nfsd4_session *new;
866 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300867
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -0400868 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400869 + sizeof(struct nfsd4_session) > PAGE_SIZE);
870 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -0400871
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400872 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300873 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400874 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -0400875 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400876 for (i = 0; i < numslots; i++) {
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400877 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400878 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -0400879 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -0400880 }
Kinglong Mee60810e52014-01-01 00:35:47 +0800881
882 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
883 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
884
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400885 return new;
886out_free:
887 while (i--)
888 kfree(new->se_slots[i]);
889 kfree(new);
890 return NULL;
891}
892
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400893static void free_conn(struct nfsd4_conn *c)
894{
895 svc_xprt_put(c->cn_xprt);
896 kfree(c);
897}
898
899static void nfsd4_conn_lost(struct svc_xpt_user *u)
900{
901 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
902 struct nfs4_client *clp = c->cn_session->se_client;
903
904 spin_lock(&clp->cl_lock);
905 if (!list_empty(&c->cn_persession)) {
906 list_del(&c->cn_persession);
907 free_conn(c);
908 }
J. Bruce Fieldseea49802010-11-18 08:34:12 -0500909 nfsd4_probe_callback(clp);
J. Bruce Fields2e4b7232013-03-08 09:30:43 -0500910 spin_unlock(&clp->cl_lock);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400911}
912
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400913static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400914{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400915 struct nfsd4_conn *conn;
916
917 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
918 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400919 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400920 svc_xprt_get(rqstp->rq_xprt);
921 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400922 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400923 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
924 return conn;
925}
926
J. Bruce Fields328ead22010-09-29 16:11:06 -0400927static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
928{
929 conn->cn_session = ses;
930 list_add(&conn->cn_persession, &ses->se_conns);
931}
932
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400933static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
934{
935 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400936
937 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -0400938 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400939 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400940}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400941
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400942static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400943{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400944 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400945 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400946}
947
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400948static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400949{
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400950 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400951
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400952 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400953 ret = nfsd4_register_conn(conn);
954 if (ret)
955 /* oops; xprt is already down: */
956 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fields6a3b1562012-09-12 09:59:17 -0400957 if (conn->cn_flags & NFS4_CDFC4_BACK) {
Weston Andros Adamson24119672012-05-24 15:42:17 -0400958 /* callback channel may be back up */
959 nfsd4_probe_callback(ses->se_client);
960 }
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400961}
962
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400963static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400964{
965 u32 dir = NFS4_CDFC4_FORE;
966
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400967 if (cses->flags & SESSION4_BACK_CHAN)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400968 dir |= NFS4_CDFC4_BACK;
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400969 return alloc_conn(rqstp, dir);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400970}
971
972/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400973static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400974{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400975 struct nfs4_client *clp = s->se_client;
976 struct nfsd4_conn *c;
977
978 spin_lock(&clp->cl_lock);
979 while (!list_empty(&s->se_conns)) {
980 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
981 list_del_init(&c->cn_persession);
982 spin_unlock(&clp->cl_lock);
983
984 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
985 free_conn(c);
986
987 spin_lock(&clp->cl_lock);
988 }
989 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400990}
991
J. Bruce Fields1377b692012-09-11 21:42:40 -0400992static void __free_session(struct nfsd4_session *ses)
993{
J. Bruce Fields1377b692012-09-11 21:42:40 -0400994 free_session_slots(ses);
995 kfree(ses);
996}
997
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400998static void free_session(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -0800999{
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001000 struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
1001
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001002 lockdep_assert_held(&nn->client_lock);
1003 nfsd4_del_conns(ses);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001004 nfsd4_put_drc_mem(&ses->se_fchannel);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001005 __free_session(ses);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001006}
Andy Adamson557ce262009-08-28 08:45:04 -04001007
Fengguang Wu135ae822012-11-10 07:20:25 -05001008static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001009{
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001010 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001011 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001012
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001013 new->se_client = clp;
1014 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001015
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001016 INIT_LIST_HEAD(&new->se_conns);
1017
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001018 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001019 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -04001020 new->se_cb_prog = cses->callback_prog;
J. Bruce Fieldsc6bb3ca2012-11-01 16:31:02 -04001021 new->se_cb_sec = cses->cb_sec;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001022 atomic_set(&new->se_ref, 0);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001023 idx = hash_sessionid(&new->se_sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001024 spin_lock(&nn->client_lock);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001025 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001026 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001027 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001028 spin_unlock(&clp->cl_lock);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001029 spin_unlock(&nn->client_lock);
Kinglong Mee60810e52014-01-01 00:35:47 +08001030
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001031 if (cses->flags & SESSION4_BACK_CHAN) {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001032 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001033 /*
1034 * This is a little silly; with sessions there's no real
1035 * use for the callback address. Use the peer address
1036 * as a reasonable default for now, but consider fixing
1037 * the rpc client not to require an address in the
1038 * future:
1039 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001040 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1041 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001042 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001043}
1044
Benny Halevy9089f1b2010-05-12 00:12:26 +03001045/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +03001046static struct nfsd4_session *
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001047find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
Marc Eshel5282fd72009-04-03 08:27:52 +03001048{
1049 struct nfsd4_session *elem;
1050 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001051 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Marc Eshel5282fd72009-04-03 08:27:52 +03001052
1053 dump_sessionid(__func__, sessionid);
1054 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +03001055 /* Search in the appropriate list */
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001056 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +03001057 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1058 NFS4_MAX_SESSIONID_LEN)) {
1059 return elem;
1060 }
1061 }
1062
1063 dprintk("%s: session not found\n", __func__);
1064 return NULL;
1065}
1066
Benny Halevy9089f1b2010-05-12 00:12:26 +03001067/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +03001068static void
Marc Eshel5282fd72009-04-03 08:27:52 +03001069unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +03001070{
1071 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001072 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +03001073 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001074 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +03001075}
1076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1078static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001079STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080{
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001081 if (clid->cl_boot == nn->boot_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +03001083 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001084 clid->cl_boot, clid->cl_id, nn->boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 return 1;
1086}
1087
1088/*
1089 * XXX Should we use a slab cache ?
1090 * This type of memory management is somewhat inefficient, but we use it
1091 * anyway since SETCLIENTID is not a common operation.
1092 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001093static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094{
1095 struct nfs4_client *clp;
1096
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001097 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1098 if (clp == NULL)
1099 return NULL;
Thomas Meyer67114fe2011-11-17 23:43:40 +01001100 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001101 if (clp->cl_name.data == NULL) {
1102 kfree(clp);
1103 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 }
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001105 clp->cl_name.len = name.len;
Trond Myklebust5694c932014-04-18 14:43:56 -04001106 INIT_LIST_HEAD(&clp->cl_sessions);
1107 idr_init(&clp->cl_stateids);
1108 atomic_set(&clp->cl_refcount, 0);
1109 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1110 INIT_LIST_HEAD(&clp->cl_idhash);
1111 INIT_LIST_HEAD(&clp->cl_openowners);
1112 INIT_LIST_HEAD(&clp->cl_delegations);
1113 INIT_LIST_HEAD(&clp->cl_lru);
1114 INIT_LIST_HEAD(&clp->cl_callbacks);
1115 INIT_LIST_HEAD(&clp->cl_revoked);
1116 spin_lock_init(&clp->cl_lock);
1117 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 return clp;
1119}
1120
Trond Myklebust4dd86e152014-04-18 14:43:58 -04001121static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122free_client(struct nfs4_client *clp)
1123{
Stanislav Kinsburskybca0ec62013-01-09 12:38:34 +03001124 struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001125
1126 lockdep_assert_held(&nn->client_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001127 while (!list_empty(&clp->cl_sessions)) {
1128 struct nfsd4_session *ses;
1129 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1130 se_perclnt);
1131 list_del(&ses->se_perclnt);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001132 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1133 free_session(ses);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001134 }
Trond Myklebust4cb57e32014-04-18 14:43:57 -04001135 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001136 free_svc_cred(&clp->cl_cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 kfree(clp->cl_name.data);
majianpeng2d32b292013-01-29 13:16:06 +08001138 idr_destroy(&clp->cl_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 kfree(clp);
1140}
1141
Benny Halevy84d38ac2010-05-12 00:13:16 +03001142/* must be called under the client_lock */
1143static inline void
1144unhash_client_locked(struct nfs4_client *clp)
1145{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001146 struct nfsd4_session *ses;
1147
Benny Halevy84d38ac2010-05-12 00:13:16 +03001148 list_del(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001149 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001150 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1151 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001152 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001153}
1154
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155static void
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001156destroy_client(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001158 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 struct list_head reaplist;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001161 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04001164 spin_lock(&state_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001165 while (!list_empty(&clp->cl_delegations)) {
1166 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
NeilBrownea1da632005-06-23 22:04:17 -07001167 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 list_move(&dp->dl_recall_lru, &reaplist);
1169 }
Benny Halevycdc97502014-05-30 09:09:30 -04001170 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 while (!list_empty(&reaplist)) {
1172 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04001173 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 }
Benny Halevy956c4fe2013-10-29 11:39:12 +02001175 list_splice_init(&clp->cl_revoked, &reaplist);
1176 while (!list_empty(&reaplist)) {
1177 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1178 destroy_revoked_delegation(dp);
1179 }
NeilBrownea1da632005-06-23 22:04:17 -07001180 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001181 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1182 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 }
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001184 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001185 if (clp->cl_cb_conn.cb_xprt)
1186 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001187 list_del(&clp->cl_idhash);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001188 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001189 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001190 else
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001191 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001192 spin_lock(&nn->client_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001193 unhash_client_locked(clp);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001194 WARN_ON_ONCE(atomic_read(&clp->cl_refcount));
1195 free_client(clp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001196 spin_unlock(&nn->client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197}
1198
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001199static void expire_client(struct nfs4_client *clp)
1200{
1201 nfsd4_client_record_remove(clp);
1202 destroy_client(clp);
1203}
1204
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001205static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1206{
1207 memcpy(target->cl_verifier.data, source->data,
1208 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209}
1210
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001211static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1212{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1214 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1215}
1216
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001217static int copy_cred(struct svc_cred *target, struct svc_cred *source)
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001218{
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001219 if (source->cr_principal) {
1220 target->cr_principal =
1221 kstrdup(source->cr_principal, GFP_KERNEL);
1222 if (target->cr_principal == NULL)
1223 return -ENOMEM;
1224 } else
1225 target->cr_principal = NULL;
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001226 target->cr_flavor = source->cr_flavor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 target->cr_uid = source->cr_uid;
1228 target->cr_gid = source->cr_gid;
1229 target->cr_group_info = source->cr_group_info;
1230 get_group_info(target->cr_group_info);
J. Bruce Fields0dc15312013-05-14 16:07:13 -04001231 target->cr_gss_mech = source->cr_gss_mech;
1232 if (source->cr_gss_mech)
1233 gss_mech_get(source->cr_gss_mech);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001234 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235}
1236
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001237static long long
1238compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1239{
1240 long long res;
1241
1242 res = o1->len - o2->len;
1243 if (res)
1244 return res;
1245 return (long long)memcmp(o1->data, o2->data, o1->len);
1246}
1247
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001248static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001249{
NeilBrowna55370a2005-06-23 22:03:52 -07001250 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251}
1252
1253static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001254same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1255{
1256 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257}
1258
1259static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001260same_clid(clientid_t *cl1, clientid_t *cl2)
1261{
1262 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263}
1264
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001265static bool groups_equal(struct group_info *g1, struct group_info *g2)
1266{
1267 int i;
1268
1269 if (g1->ngroups != g2->ngroups)
1270 return false;
1271 for (i=0; i<g1->ngroups; i++)
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001272 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001273 return false;
1274 return true;
1275}
1276
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001277/*
1278 * RFC 3530 language requires clid_inuse be returned when the
1279 * "principal" associated with a requests differs from that previously
1280 * used. We use uid, gid's, and gss principal string as our best
1281 * approximation. We also don't want to allow non-gss use of a client
1282 * established using gss: in theory cr_principal should catch that
1283 * change, but in practice cr_principal can be null even in the gss case
1284 * since gssd doesn't always pass down a principal string.
1285 */
1286static bool is_gss_cred(struct svc_cred *cr)
1287{
1288 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1289 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1290}
1291
1292
Vivek Trivedi5559b502012-07-24 21:18:20 +05301293static bool
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001294same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1295{
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001296 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001297 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1298 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001299 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1300 return false;
1301 if (cr1->cr_principal == cr2->cr_principal)
1302 return true;
1303 if (!cr1->cr_principal || !cr2->cr_principal)
1304 return false;
Vivek Trivedi5559b502012-07-24 21:18:20 +05301305 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306}
1307
J. Bruce Fields57266a62013-04-13 14:27:29 -04001308static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1309{
1310 struct svc_cred *cr = &rqstp->rq_cred;
1311 u32 service;
1312
J. Bruce Fieldsc4720592013-08-07 11:41:49 -04001313 if (!cr->cr_gss_mech)
1314 return false;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001315 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1316 return service == RPC_GSS_SVC_INTEGRITY ||
1317 service == RPC_GSS_SVC_PRIVACY;
1318}
1319
1320static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1321{
1322 struct svc_cred *cr = &rqstp->rq_cred;
1323
1324 if (!cl->cl_mach_cred)
1325 return true;
1326 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1327 return false;
1328 if (!svc_rqst_integrity_protected(rqstp))
1329 return false;
1330 if (!cr->cr_principal)
1331 return false;
1332 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1333}
1334
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001335static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001336{
1337 static u32 current_clientid = 1;
1338
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001339 clp->cl_clientid.cl_boot = nn->boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 clp->cl_clientid.cl_id = current_clientid++;
1341}
1342
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001343static void gen_confirm(struct nfs4_client *clp)
1344{
Chuck Leverab4684d2012-03-02 17:13:50 -05001345 __be32 verf[2];
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001346 static u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
Chuck Leverab4684d2012-03-02 17:13:50 -05001348 verf[0] = (__be32)get_seconds();
1349 verf[1] = (__be32)i++;
1350 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351}
1352
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001353static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001354{
J. Bruce Fields3abdb602013-02-03 12:23:01 -05001355 struct nfs4_stid *ret;
1356
1357 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1358 if (!ret || !ret->sc_type)
1359 return NULL;
1360 return ret;
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001361}
1362
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001363static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001364{
1365 struct nfs4_stid *s;
1366
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001367 s = find_stateid(cl, t);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001368 if (!s)
1369 return NULL;
1370 if (typemask & s->sc_type)
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001371 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04001372 return NULL;
1373}
1374
Jeff Layton2216d442012-11-12 15:00:57 -05001375static struct nfs4_client *create_client(struct xdr_netobj name,
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001376 struct svc_rqst *rqstp, nfs4_verifier *verf)
1377{
1378 struct nfs4_client *clp;
1379 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001380 int ret;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001381 struct net *net = SVC_NET(rqstp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001382 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001383
1384 clp = alloc_client(name);
1385 if (clp == NULL)
1386 return NULL;
1387
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001388 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1389 if (ret) {
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001390 spin_lock(&nn->client_lock);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001391 free_client(clp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001392 spin_unlock(&nn->client_lock);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001393 return NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001394 }
J. Bruce Fields57725152012-11-05 15:10:26 -05001395 nfsd4_init_callback(&clp->cl_cb_null);
Benny Halevy07cd4902010-05-12 00:13:41 +03001396 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001397 clear_bit(0, &clp->cl_cb_slot_busy);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001398 copy_verf(clp, verf);
1399 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001400 gen_confirm(clp);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001401 clp->cl_cb_session = NULL;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001402 clp->net = net;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001403 return clp;
1404}
1405
NeilBrownfd39ca92005-06-23 22:04:03 -07001406static void
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001407add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1408{
1409 struct rb_node **new = &(root->rb_node), *parent = NULL;
1410 struct nfs4_client *clp;
1411
1412 while (*new) {
1413 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1414 parent = *new;
1415
1416 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1417 new = &((*new)->rb_left);
1418 else
1419 new = &((*new)->rb_right);
1420 }
1421
1422 rb_link_node(&new_clp->cl_namenode, parent, new);
1423 rb_insert_color(&new_clp->cl_namenode, root);
1424}
1425
1426static struct nfs4_client *
1427find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1428{
1429 long long cmp;
1430 struct rb_node *node = root->rb_node;
1431 struct nfs4_client *clp;
1432
1433 while (node) {
1434 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1435 cmp = compare_blob(&clp->cl_name, name);
1436 if (cmp > 0)
1437 node = node->rb_left;
1438 else if (cmp < 0)
1439 node = node->rb_right;
1440 else
1441 return clp;
1442 }
1443 return NULL;
1444}
1445
1446static void
1447add_to_unconfirmed(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448{
1449 unsigned int idhashval;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001450 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001452 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001453 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001455 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
Benny Halevy36acb662010-05-12 00:13:04 +03001456 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457}
1458
NeilBrownfd39ca92005-06-23 22:04:03 -07001459static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460move_to_confirmed(struct nfs4_client *clp)
1461{
1462 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001463 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
1465 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001466 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001467 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001468 add_clp_to_name_tree(clp, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001469 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 renew_client(clp);
1471}
1472
1473static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001474find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475{
1476 struct nfs4_client *clp;
1477 unsigned int idhashval = clientid_hashval(clid->cl_id);
1478
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001479 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001480 if (same_clid(&clp->cl_clientid, clid)) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001481 if ((bool)clp->cl_minorversion != sessions)
1482 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001483 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 }
1487 return NULL;
1488}
1489
1490static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001491find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1492{
1493 struct list_head *tbl = nn->conf_id_hashtbl;
1494
1495 return find_client_in_id_table(tbl, clid, sessions);
1496}
1497
1498static struct nfs4_client *
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001499find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500{
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001501 struct list_head *tbl = nn->unconf_id_hashtbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001503 return find_client_in_id_table(tbl, clid, sessions);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504}
1505
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001506static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001507{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001508 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001509}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001510
NeilBrown28ce6052005-06-23 22:03:56 -07001511static struct nfs4_client *
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001512find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07001513{
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001514 return find_clp_in_name_tree(name, &nn->conf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07001515}
1516
1517static struct nfs4_client *
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001518find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07001519{
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001520 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07001521}
1522
NeilBrownfd39ca92005-06-23 22:04:03 -07001523static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001524gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525{
J. Bruce Fields07263f12010-05-31 19:09:40 -04001526 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001527 struct sockaddr *sa = svc_addr(rqstp);
1528 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04001529 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Jeff Layton7077ecb2009-08-14 12:57:58 -04001531 /* Currently, we only support tcp and tcp6 for the callback channel */
1532 if (se->se_callback_netid_len == 3 &&
1533 !memcmp(se->se_callback_netid_val, "tcp", 3))
1534 expected_family = AF_INET;
1535 else if (se->se_callback_netid_len == 4 &&
1536 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1537 expected_family = AF_INET6;
1538 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 goto out_err;
1540
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001541 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001542 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04001543 (struct sockaddr *)&conn->cb_addr,
1544 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001545
J. Bruce Fields07263f12010-05-31 19:09:40 -04001546 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001548
J. Bruce Fields07263f12010-05-31 19:09:40 -04001549 if (conn->cb_addr.ss_family == AF_INET6)
1550 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04001551
J. Bruce Fields07263f12010-05-31 19:09:40 -04001552 conn->cb_prog = se->se_callback_prog;
1553 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08001554 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 return;
1556out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04001557 conn->cb_addr.ss_family = AF_UNSPEC;
1558 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07001559 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 "will not receive delegations\n",
1561 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1562
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 return;
1564}
1565
Andy Adamson074fe892009-04-03 08:28:15 +03001566/*
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04001567 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03001568 */
1569void
1570nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1571{
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001572 struct xdr_buf *buf = resp->xdr.buf;
Andy Adamson557ce262009-08-28 08:45:04 -04001573 struct nfsd4_slot *slot = resp->cstate.slot;
1574 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03001575
Andy Adamson557ce262009-08-28 08:45:04 -04001576 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001577
Andy Adamson557ce262009-08-28 08:45:04 -04001578 slot->sl_opcnt = resp->opcnt;
1579 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001580
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05001581 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001582 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04001583 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001584 return;
1585 }
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001586 base = resp->cstate.data_offset;
1587 slot->sl_datalen = buf->len - base;
1588 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
Andy Adamson557ce262009-08-28 08:45:04 -04001589 WARN("%s: sessions DRC could not cache compound\n", __func__);
1590 return;
Andy Adamson074fe892009-04-03 08:28:15 +03001591}
1592
1593/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04001594 * Encode the replay sequence operation from the slot values.
1595 * If cachethis is FALSE encode the uncached rep error on the next
1596 * operation which sets resp->p and increments resp->opcnt for
1597 * nfs4svc_encode_compoundres.
1598 *
Andy Adamson074fe892009-04-03 08:28:15 +03001599 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04001600static __be32
1601nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1602 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03001603{
Andy Adamsonabfabf82009-07-23 19:02:18 -04001604 struct nfsd4_op *op;
1605 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001606
Andy Adamsonabfabf82009-07-23 19:02:18 -04001607 /* Encode the replayed sequence operation */
1608 op = &args->ops[resp->opcnt - 1];
1609 nfsd4_encode_operation(resp, op);
1610
1611 /* Return nfserr_retry_uncached_rep in next operation. */
J. Bruce Fields73e79482012-02-13 16:39:00 -05001612 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04001613 op = &args->ops[resp->opcnt++];
1614 op->status = nfserr_retry_uncached_rep;
1615 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03001616 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04001617 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03001618}
1619
1620/*
Andy Adamson557ce262009-08-28 08:45:04 -04001621 * The sequence operation is not cached because we can use the slot and
1622 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03001623 */
J. Bruce Fields3ca2eb92014-03-21 12:04:21 -04001624static __be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03001625nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1626 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03001627{
Andy Adamson557ce262009-08-28 08:45:04 -04001628 struct nfsd4_slot *slot = resp->cstate.slot;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001629 struct xdr_stream *xdr = &resp->xdr;
1630 __be32 *p;
Andy Adamson074fe892009-04-03 08:28:15 +03001631 __be32 status;
1632
Andy Adamson557ce262009-08-28 08:45:04 -04001633 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001634
Andy Adamsonabfabf82009-07-23 19:02:18 -04001635 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
J. Bruce Fields0da7b192014-03-21 11:43:34 -04001636 if (status)
Andy Adamsonabfabf82009-07-23 19:02:18 -04001637 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03001638
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001639 p = xdr_reserve_space(xdr, slot->sl_datalen);
1640 if (!p) {
1641 WARN_ON_ONCE(1);
1642 return nfserr_serverfault;
1643 }
1644 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
1645 xdr_commit_encode(xdr);
Andy Adamson074fe892009-04-03 08:28:15 +03001646
Andy Adamson557ce262009-08-28 08:45:04 -04001647 resp->opcnt = slot->sl_opcnt;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001648 return slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03001649}
1650
Andy Adamson0733d212009-04-03 08:28:01 +03001651/*
1652 * Set the exchange_id flags returned by the server.
1653 */
1654static void
1655nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1656{
1657 /* pNFS is not supported */
1658 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1659
1660 /* Referrals are supported, Migration is not. */
1661 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1662
1663 /* set the wire flags to return to client. */
1664 clid->flags = new->cl_exchange_flags;
1665}
1666
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001667static bool client_has_state(struct nfs4_client *clp)
1668{
1669 /*
1670 * Note clp->cl_openowners check isn't quite right: there's no
1671 * need to count owners without stateid's.
1672 *
1673 * Also note we should probably be using this in 4.0 case too.
1674 */
J. Bruce Fields6eccece2012-05-29 16:37:44 -04001675 return !list_empty(&clp->cl_openowners)
1676 || !list_empty(&clp->cl_delegations)
1677 || !list_empty(&clp->cl_sessions);
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001678}
1679
Al Virob37ad282006-10-19 23:28:59 -07001680__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03001681nfsd4_exchange_id(struct svc_rqst *rqstp,
1682 struct nfsd4_compound_state *cstate,
1683 struct nfsd4_exchange_id *exid)
1684{
Andy Adamson0733d212009-04-03 08:28:01 +03001685 struct nfs4_client *unconf, *conf, *new;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001686 __be32 status;
Jeff Layton363168b2009-08-14 12:57:56 -04001687 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03001688 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04001689 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001690 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001691 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamson0733d212009-04-03 08:28:01 +03001692
Jeff Layton363168b2009-08-14 12:57:56 -04001693 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03001694 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04001695 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03001696 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04001697 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03001698
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001699 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03001700 return nfserr_inval;
1701
Andy Adamson0733d212009-04-03 08:28:01 +03001702 switch (exid->spa_how) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04001703 case SP4_MACH_CRED:
1704 if (!svc_rqst_integrity_protected(rqstp))
1705 return nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03001706 case SP4_NONE:
1707 break;
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05001708 default: /* checked by xdr code */
1709 WARN_ON_ONCE(1);
Andy Adamson0733d212009-04-03 08:28:01 +03001710 case SP4_SSV:
J. Bruce Fieldsdd303332013-04-12 18:10:56 -04001711 return nfserr_encr_alg_unsupp;
Andy Adamson0733d212009-04-03 08:28:01 +03001712 }
1713
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001714 /* Cases below refer to rfc 5661 section 18.35.4: */
Andy Adamson0733d212009-04-03 08:28:01 +03001715 nfs4_lock_state();
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001716 conf = find_confirmed_client_by_name(&exid->clname, nn);
Andy Adamson0733d212009-04-03 08:28:01 +03001717 if (conf) {
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001718 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
1719 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
1720
J. Bruce Fields136e6582012-05-12 20:37:23 -04001721 if (update) {
1722 if (!clp_used_exchangeid(conf)) { /* buggy client */
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001723 status = nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03001724 goto out;
1725 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04001726 if (!mach_creds_match(conf, rqstp)) {
1727 status = nfserr_wrong_cred;
1728 goto out;
1729 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001730 if (!creds_match) { /* case 9 */
Andy Adamson0733d212009-04-03 08:28:01 +03001731 status = nfserr_perm;
1732 goto out;
1733 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001734 if (!verfs_match) { /* case 8 */
Andy Adamson0733d212009-04-03 08:28:01 +03001735 status = nfserr_not_same;
1736 goto out;
1737 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001738 /* case 6 */
1739 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1740 new = conf;
1741 goto out_copy;
Andy Adamson0733d212009-04-03 08:28:01 +03001742 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001743 if (!creds_match) { /* case 3 */
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001744 if (client_has_state(conf)) {
1745 status = nfserr_clid_inuse;
1746 goto out;
1747 }
Andy Adamson0733d212009-04-03 08:28:01 +03001748 expire_client(conf);
1749 goto out_new;
1750 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001751 if (verfs_match) { /* case 2 */
J. Bruce Fields0f1ba0e2012-05-25 21:24:40 -04001752 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04001753 new = conf;
1754 goto out_copy;
1755 }
1756 /* case 5, client reboot */
J. Bruce Fields136e6582012-05-12 20:37:23 -04001757 goto out_new;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001758 }
1759
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001760 if (update) { /* case 7 */
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001761 status = nfserr_noent;
1762 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001763 }
1764
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001765 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001766 if (unconf) /* case 4, possible retry or client restart */
Andy Adamson0733d212009-04-03 08:28:01 +03001767 expire_client(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03001768
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001769 /* case 1 (normal case) */
Andy Adamson0733d212009-04-03 08:28:01 +03001770out_new:
Jeff Layton2216d442012-11-12 15:00:57 -05001771 new = create_client(exid->clname, rqstp, &verf);
Andy Adamson0733d212009-04-03 08:28:01 +03001772 if (new == NULL) {
J. Bruce Fields47310302010-06-22 16:17:12 -04001773 status = nfserr_jukebox;
Andy Adamson0733d212009-04-03 08:28:01 +03001774 goto out;
1775 }
J. Bruce Fields4f540e22013-05-07 11:57:52 -04001776 new->cl_minorversion = cstate->minorversion;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001777 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
Andy Adamson0733d212009-04-03 08:28:01 +03001778
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001779 gen_clid(new, nn);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001780 add_to_unconfirmed(new);
Andy Adamson0733d212009-04-03 08:28:01 +03001781out_copy:
1782 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1783 exid->clientid.cl_id = new->cl_clientid.cl_id;
1784
J. Bruce Fields778df3f2012-05-25 21:40:23 -04001785 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001786 nfsd4_set_ex_flags(new, exid);
1787
1788 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001789 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03001790 status = nfs_ok;
1791
1792out:
1793 nfs4_unlock_state();
Andy Adamson0733d212009-04-03 08:28:01 +03001794 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001795}
1796
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001797static __be32
Andy Adamson88e588d2009-07-23 19:02:15 -04001798check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001799{
Andy Adamson88e588d2009-07-23 19:02:15 -04001800 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1801 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001802
1803 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04001804 if (slot_inuse) {
1805 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001806 return nfserr_jukebox;
1807 else
1808 return nfserr_seq_misordered;
1809 }
J. Bruce Fieldsf6d82482012-02-13 16:13:41 -05001810 /* Note unsigned 32-bit arithmetic handles wraparound: */
Andy Adamson88e588d2009-07-23 19:02:15 -04001811 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03001812 return nfs_ok;
Andy Adamson88e588d2009-07-23 19:02:15 -04001813 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001814 return nfserr_replay_cache;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001815 return nfserr_seq_misordered;
1816}
1817
Andy Adamson49557cc2009-07-23 19:02:16 -04001818/*
1819 * Cache the create session result into the create session single DRC
1820 * slot cache by saving the xdr structure. sl_seqid has been set.
1821 * Do this for solo or embedded create session operations.
1822 */
1823static void
1824nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001825 struct nfsd4_clid_slot *slot, __be32 nfserr)
Andy Adamson49557cc2009-07-23 19:02:16 -04001826{
1827 slot->sl_status = nfserr;
1828 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1829}
1830
1831static __be32
1832nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1833 struct nfsd4_clid_slot *slot)
1834{
1835 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1836 return slot->sl_status;
1837}
1838
Mi Jinlong1b74c252011-07-14 14:50:17 +08001839#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1840 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1841 1 + /* MIN tag is length with zero, only length */ \
1842 3 + /* version, opcount, opcode */ \
1843 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1844 /* seqid, slotID, slotID, cache */ \
1845 4 ) * sizeof(__be32))
1846
1847#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1848 2 + /* verifier: AUTH_NULL, length 0 */\
1849 1 + /* status */ \
1850 1 + /* MIN tag is length with zero, only length */ \
1851 3 + /* opcount, opcode, opstatus*/ \
1852 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1853 /* seqid, slotID, slotID, slotID, status */ \
1854 5 ) * sizeof(__be32))
1855
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001856static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
Mi Jinlong1b74c252011-07-14 14:50:17 +08001857{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001858 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
1859
J. Bruce Fields373cd402013-04-08 15:42:12 -04001860 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
1861 return nfserr_toosmall;
1862 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
1863 return nfserr_toosmall;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001864 ca->headerpadsz = 0;
1865 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
1866 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
1867 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
1868 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
1869 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
1870 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
1871 /*
1872 * Note decreasing slot size below client's request may make it
1873 * difficult for client to function correctly, whereas
1874 * decreasing the number of slots will (just?) affect
1875 * performance. When short on memory we therefore prefer to
1876 * decrease number of slots instead of their size. Clients that
1877 * request larger slots than they need will get poor results:
1878 */
1879 ca->maxreqs = nfsd4_get_drc_mem(ca);
1880 if (!ca->maxreqs)
1881 return nfserr_jukebox;
1882
J. Bruce Fields373cd402013-04-08 15:42:12 -04001883 return nfs_ok;
Mi Jinlong1b74c252011-07-14 14:50:17 +08001884}
1885
Kinglong Mee8a891632013-12-23 18:11:02 +08001886#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
1887 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
1888#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
1889 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
1890
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001891static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
1892{
1893 ca->headerpadsz = 0;
1894
1895 /*
1896 * These RPC_MAX_HEADER macros are overkill, especially since we
1897 * don't even do gss on the backchannel yet. But this is still
1898 * less than 1k. Tighten up this estimate in the unlikely event
1899 * it turns out to be a problem for some client:
1900 */
Kinglong Mee8a891632013-12-23 18:11:02 +08001901 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001902 return nfserr_toosmall;
Kinglong Mee8a891632013-12-23 18:11:02 +08001903 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001904 return nfserr_toosmall;
1905 ca->maxresp_cached = 0;
1906 if (ca->maxops < 2)
1907 return nfserr_toosmall;
1908
1909 return nfs_ok;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001910}
1911
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04001912static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
1913{
1914 switch (cbs->flavor) {
1915 case RPC_AUTH_NULL:
1916 case RPC_AUTH_UNIX:
1917 return nfs_ok;
1918 default:
1919 /*
1920 * GSS case: the spec doesn't allow us to return this
1921 * error. But it also doesn't allow us not to support
1922 * GSS.
1923 * I'd rather this fail hard than return some error the
1924 * client might think it can already handle:
1925 */
1926 return nfserr_encr_alg_unsupp;
1927 }
1928}
1929
Andy Adamson069b6ad2009-04-03 08:27:58 +03001930__be32
1931nfsd4_create_session(struct svc_rqst *rqstp,
1932 struct nfsd4_compound_state *cstate,
1933 struct nfsd4_create_session *cr_ses)
1934{
Jeff Layton363168b2009-08-14 12:57:56 -04001935 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001936 struct nfs4_client *conf, *unconf;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001937 struct nfsd4_session *new;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001938 struct nfsd4_conn *conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001939 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001940 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001941 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001942
Mi Jinlonga62573d2011-03-23 17:57:07 +08001943 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
1944 return nfserr_inval;
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04001945 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
1946 if (status)
1947 return status;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001948 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
J. Bruce Fields373cd402013-04-08 15:42:12 -04001949 if (status)
1950 return status;
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001951 status = check_backchannel_attrs(&cr_ses->back_channel);
1952 if (status)
Kinglong Meef403e452013-12-23 17:31:21 +08001953 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001954 status = nfserr_jukebox;
Kinglong Mee60810e52014-01-01 00:35:47 +08001955 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001956 if (!new)
1957 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001958 conn = alloc_conn_from_crses(rqstp, cr_ses);
1959 if (!conn)
1960 goto out_free_session;
Mi Jinlonga62573d2011-03-23 17:57:07 +08001961
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001962 nfs4_lock_state();
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001963 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001964 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04001965 WARN_ON_ONCE(conf && unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001966
1967 if (conf) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04001968 status = nfserr_wrong_cred;
1969 if (!mach_creds_match(conf, rqstp))
1970 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001971 cs_slot = &conf->cl_cs_slot;
1972 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001973 if (status == nfserr_replay_cache) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001974 status = nfsd4_replay_create_session(cr_ses, cs_slot);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001975 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001976 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001977 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001978 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001979 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001980 } else if (unconf) {
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04001981 struct nfs4_client *old;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001982 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04001983 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001984 status = nfserr_clid_inuse;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001985 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001986 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04001987 status = nfserr_wrong_cred;
1988 if (!mach_creds_match(unconf, rqstp))
1989 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001990 cs_slot = &unconf->cl_cs_slot;
1991 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001992 if (status) {
1993 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001994 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001995 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001996 }
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001997 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001998 if (old) {
1999 status = mark_client_expired(old);
2000 if (status)
2001 goto out_free_conn;
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04002002 expire_client(old);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002003 }
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04002004 move_to_confirmed(unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002005 conf = unconf;
2006 } else {
2007 status = nfserr_stale_clientid;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002008 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002009 }
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002010 status = nfs_ok;
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002011 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04002012 * We do not support RDMA or persistent sessions
2013 */
2014 cr_ses->flags &= ~SESSION4_PERSIST;
2015 cr_ses->flags &= ~SESSION4_RDMA;
2016
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002017 init_session(rqstp, new, conf, cr_ses);
2018 nfsd4_init_conn(rqstp, conn, new);
2019
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002020 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002021 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04002022 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04002023 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002024
Andy Adamson49557cc2009-07-23 19:02:16 -04002025 /* cache solo and embedded create sessions under the state lock */
2026 nfsd4_cache_create_session(cr_ses, cs_slot, status);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002027 nfs4_unlock_state();
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002028 return status;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002029out_free_conn:
Yanchuan Nian266533c2012-12-24 18:11:45 +08002030 nfs4_unlock_state();
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002031 free_conn(conn);
2032out_free_session:
2033 __free_session(new);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002034out_release_drc_mem:
2035 nfsd4_put_drc_mem(&cr_ses->fore_channel);
J. Bruce Fields1ca50792013-03-14 18:12:03 -04002036 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002037}
2038
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002039static __be32 nfsd4_map_bcts_dir(u32 *dir)
2040{
2041 switch (*dir) {
2042 case NFS4_CDFC4_FORE:
2043 case NFS4_CDFC4_BACK:
2044 return nfs_ok;
2045 case NFS4_CDFC4_FORE_OR_BOTH:
2046 case NFS4_CDFC4_BACK_OR_BOTH:
2047 *dir = NFS4_CDFC4_BOTH;
2048 return nfs_ok;
2049 };
2050 return nfserr_inval;
2051}
2052
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002053__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2054{
2055 struct nfsd4_session *session = cstate->session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002056 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002057 __be32 status;
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002058
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002059 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2060 if (status)
2061 return status;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002062 spin_lock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002063 session->se_cb_prog = bc->bc_cb_program;
2064 session->se_cb_sec = bc->bc_cb_sec;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002065 spin_unlock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002066
2067 nfsd4_probe_callback(session->se_client);
2068
2069 return nfs_ok;
2070}
2071
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002072__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2073 struct nfsd4_compound_state *cstate,
2074 struct nfsd4_bind_conn_to_session *bcts)
2075{
2076 __be32 status;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002077 struct nfsd4_conn *conn;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002078 struct nfsd4_session *session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002079 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002080
2081 if (!nfsd4_last_compound_op(rqstp))
2082 return nfserr_not_only_op;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002083 nfs4_lock_state();
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002084 spin_lock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002085 session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp));
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002086 spin_unlock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002087 status = nfserr_badsession;
2088 if (!session)
2089 goto out;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002090 status = nfserr_wrong_cred;
2091 if (!mach_creds_match(session->se_client, rqstp))
2092 goto out;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002093 status = nfsd4_map_bcts_dir(&bcts->dir);
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002094 if (status)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002095 goto out;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002096 conn = alloc_conn(rqstp, bcts->dir);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002097 status = nfserr_jukebox;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002098 if (!conn)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002099 goto out;
2100 nfsd4_init_conn(rqstp, conn, session);
2101 status = nfs_ok;
2102out:
2103 nfs4_unlock_state();
2104 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002105}
2106
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002107static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2108{
2109 if (!session)
2110 return 0;
2111 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2112}
2113
Andy Adamson069b6ad2009-04-03 08:27:58 +03002114__be32
2115nfsd4_destroy_session(struct svc_rqst *r,
2116 struct nfsd4_compound_state *cstate,
2117 struct nfsd4_destroy_session *sessionid)
2118{
Benny Halevye10e0cf2009-04-03 08:28:38 +03002119 struct nfsd4_session *ses;
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002120 __be32 status;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002121 int ref_held_by_me = 0;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002122 struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002123
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002124 nfs4_lock_state();
2125 status = nfserr_not_only_op;
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002126 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04002127 if (!nfsd4_last_compound_op(r))
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002128 goto out;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002129 ref_held_by_me++;
J. Bruce Fields57716352010-04-21 12:27:19 -04002130 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03002131 dump_sessionid(__func__, &sessionid->sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002132 spin_lock(&nn->client_lock);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03002133 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r));
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002134 status = nfserr_badsession;
2135 if (!ses)
2136 goto out_client_lock;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002137 status = nfserr_wrong_cred;
2138 if (!mach_creds_match(ses->se_client, r))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002139 goto out_client_lock;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002140 nfsd4_get_session_locked(ses);
2141 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002142 if (status)
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002143 goto out_put_session;
Benny Halevye10e0cf2009-04-03 08:28:38 +03002144 unhash_session(ses);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002145 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002146
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05002147 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04002148
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002149 spin_lock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002150 status = nfs_ok;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002151out_put_session:
2152 nfsd4_put_session(ses);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002153out_client_lock:
2154 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002155out:
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002156 nfs4_unlock_state();
Benny Halevye10e0cf2009-04-03 08:28:38 +03002157 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002158}
2159
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002160static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002161{
2162 struct nfsd4_conn *c;
2163
2164 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002165 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04002166 return c;
2167 }
2168 }
2169 return NULL;
2170}
2171
J. Bruce Fields57266a62013-04-13 14:27:29 -04002172static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002173{
2174 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002175 struct nfsd4_conn *c;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002176 __be32 status = nfs_ok;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002177 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002178
2179 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002180 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002181 if (c)
2182 goto out_free;
2183 status = nfserr_conn_not_bound_to_session;
2184 if (clp->cl_mach_cred)
2185 goto out_free;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002186 __nfsd4_hash_conn(new, ses);
2187 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002188 ret = nfsd4_register_conn(new);
2189 if (ret)
2190 /* oops; xprt is already down: */
2191 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002192 return nfs_ok;
2193out_free:
2194 spin_unlock(&clp->cl_lock);
2195 free_conn(new);
2196 return status;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002197}
2198
Mi Jinlong868b89c2011-04-27 09:09:58 +08002199static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2200{
2201 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2202
2203 return args->opcnt > session->se_fchannel.maxops;
2204}
2205
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002206static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2207 struct nfsd4_session *session)
2208{
2209 struct xdr_buf *xb = &rqstp->rq_arg;
2210
2211 return xb->len > session->se_fchannel.maxreq_sz;
2212}
2213
Andy Adamson069b6ad2009-04-03 08:27:58 +03002214__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03002215nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002216 struct nfsd4_compound_state *cstate,
2217 struct nfsd4_sequence *seq)
2218{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002219 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002220 struct xdr_stream *xdr = &resp->xdr;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002221 struct nfsd4_session *session;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002222 struct nfs4_client *clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002223 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002224 struct nfsd4_conn *conn;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002225 __be32 status;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002226 int buflen;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002227 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002228
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002229 if (resp->opcnt != 1)
2230 return nfserr_sequence_pos;
2231
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002232 /*
2233 * Will be either used or freed by nfsd4_sequence_check_conn
2234 * below.
2235 */
2236 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2237 if (!conn)
2238 return nfserr_jukebox;
2239
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002240 spin_lock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002241 status = nfserr_badsession;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03002242 session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp));
Benny Halevyb85d4c02009-04-03 08:28:08 +03002243 if (!session)
J. Bruce Fields221a6872013-04-01 22:23:49 -04002244 goto out_no_session;
2245 clp = session->se_client;
2246 status = get_client_locked(clp);
2247 if (status)
2248 goto out_no_session;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002249 status = nfsd4_get_session_locked(session);
2250 if (status)
2251 goto out_put_client;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002252
Mi Jinlong868b89c2011-04-27 09:09:58 +08002253 status = nfserr_too_many_ops;
2254 if (nfsd4_session_too_many_ops(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002255 goto out_put_session;
Mi Jinlong868b89c2011-04-27 09:09:58 +08002256
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002257 status = nfserr_req_too_big;
2258 if (nfsd4_request_too_big(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002259 goto out_put_session;
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002260
Benny Halevyb85d4c02009-04-03 08:28:08 +03002261 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03002262 if (seq->slotid >= session->se_fchannel.maxreqs)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002263 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002264
Andy Adamson557ce262009-08-28 08:45:04 -04002265 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03002266 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2267
Andy Adamsona8dfdae2009-08-28 08:45:02 -04002268 /* We do not negotiate the number of slots yet, so set the
2269 * maxslots to the session maxreqs which is used to encode
2270 * sr_highest_slotid and the sr_target_slot id to maxslots */
2271 seq->maxslots = session->se_fchannel.maxreqs;
2272
J. Bruce Fields73e79482012-02-13 16:39:00 -05002273 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2274 slot->sl_flags & NFSD4_SLOT_INUSE);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002275 if (status == nfserr_replay_cache) {
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002276 status = nfserr_seq_misordered;
2277 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002278 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002279 cstate->slot = slot;
2280 cstate->session = session;
Andy Adamsonda3846a2009-04-03 08:28:22 +03002281 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04002282 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03002283 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03002284 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002285 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002286 }
2287 if (status)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002288 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002289
J. Bruce Fields57266a62013-04-13 14:27:29 -04002290 status = nfsd4_sequence_check_conn(conn, session);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002291 conn = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002292 if (status)
2293 goto out_put_session;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002294
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002295 buflen = (seq->cachethis) ?
2296 session->se_fchannel.maxresp_cached :
2297 session->se_fchannel.maxresp_sz;
2298 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2299 nfserr_rep_too_big;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04002300 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002301 goto out_put_session;
J. Bruce Fields32aaa622014-03-20 20:47:41 -04002302 svc_reserve(rqstp, buflen);
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002303
2304 status = nfs_ok;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002305 /* Success! bump slot seqid */
Benny Halevyb85d4c02009-04-03 08:28:08 +03002306 slot->sl_seqid = seq->seqid;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002307 slot->sl_flags |= NFSD4_SLOT_INUSE;
J. Bruce Fields73e79482012-02-13 16:39:00 -05002308 if (seq->cachethis)
2309 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002310 else
2311 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002312
2313 cstate->slot = slot;
2314 cstate->session = session;
2315
Benny Halevyb85d4c02009-04-03 08:28:08 +03002316out:
J. Bruce Fields221a6872013-04-01 22:23:49 -04002317 switch (clp->cl_cb_state) {
2318 case NFSD4_CB_DOWN:
2319 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2320 break;
2321 case NFSD4_CB_FAULT:
2322 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2323 break;
2324 default:
2325 seq->status_flags = 0;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002326 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04002327 if (!list_empty(&clp->cl_revoked))
2328 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002329out_no_session:
Kinglong Mee3f42d2c2014-03-24 11:56:59 +08002330 if (conn)
2331 free_conn(conn);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002332 spin_unlock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002333 return status;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002334out_put_session:
2335 nfsd4_put_session(session);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002336out_put_client:
2337 put_client_renew_locked(clp);
2338 goto out_no_session;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002339}
2340
Mi Jinlong345c2842011-10-20 17:51:39 +08002341__be32
2342nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2343{
2344 struct nfs4_client *conf, *unconf, *clp;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002345 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002346 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Mi Jinlong345c2842011-10-20 17:51:39 +08002347
2348 nfs4_lock_state();
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002349 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002350 conf = find_confirmed_client(&dc->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04002351 WARN_ON_ONCE(conf && unconf);
Mi Jinlong345c2842011-10-20 17:51:39 +08002352
2353 if (conf) {
2354 clp = conf;
2355
J. Bruce Fieldsc0293b02013-03-14 18:20:01 -04002356 if (client_has_state(conf)) {
Mi Jinlong345c2842011-10-20 17:51:39 +08002357 status = nfserr_clientid_busy;
2358 goto out;
2359 }
2360 } else if (unconf)
2361 clp = unconf;
2362 else {
2363 status = nfserr_stale_clientid;
2364 goto out;
2365 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002366 if (!mach_creds_match(clp, rqstp)) {
2367 status = nfserr_wrong_cred;
2368 goto out;
2369 }
Mi Jinlong345c2842011-10-20 17:51:39 +08002370 expire_client(clp);
2371out:
2372 nfs4_unlock_state();
Mi Jinlong345c2842011-10-20 17:51:39 +08002373 return status;
2374}
2375
Andy Adamson069b6ad2009-04-03 08:27:58 +03002376__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002377nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2378{
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002379 __be32 status = 0;
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002380
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002381 if (rc->rca_one_fs) {
2382 if (!cstate->current_fh.fh_dentry)
2383 return nfserr_nofilehandle;
2384 /*
2385 * We don't take advantage of the rca_one_fs case.
2386 * That's OK, it's optional, we can safely ignore it.
2387 */
2388 return nfs_ok;
2389 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002390
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002391 nfs4_lock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002392 status = nfserr_complete_already;
Jeff Laytona52d7262012-03-21 09:52:02 -04002393 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2394 &cstate->session->se_client->cl_flags))
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002395 goto out;
2396
2397 status = nfserr_stale_clientid;
2398 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002399 /*
2400 * The following error isn't really legal.
2401 * But we only get here if the client just explicitly
2402 * destroyed the client. Surely it no longer cares what
2403 * error it gets back on an operation for the dead
2404 * client.
2405 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002406 goto out;
2407
2408 status = nfs_ok;
Jeff Layton2a4317c2012-03-21 16:42:43 -04002409 nfsd4_client_record_create(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002410out:
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002411 nfs4_unlock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002412 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002413}
2414
2415__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002416nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2417 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002419 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 nfs4_verifier clverifier = setclid->se_verf;
NeilBrown28ce6052005-06-23 22:03:56 -07002421 struct nfs4_client *conf, *unconf, *new;
Al Virob37ad282006-10-19 23:28:59 -07002422 __be32 status;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002423 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2424
J. Bruce Fields63db4632012-05-18 21:54:19 -04002425 /* Cases below refer to rfc 3530 section 14.2.33: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 nfs4_lock_state();
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002427 conf = find_confirmed_client_by_name(&clname, nn);
NeilBrown28ce6052005-06-23 22:03:56 -07002428 if (conf) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04002429 /* case 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002431 if (clp_used_exchangeid(conf))
2432 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04002433 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04002434 char addr_str[INET6_ADDRSTRLEN];
2435 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2436 sizeof(addr_str));
2437 dprintk("NFSD: setclientid: string in use by client "
2438 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 goto out;
2440 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002442 unconf = find_unconfirmed_client_by_name(&clname, nn);
J. Bruce Fields8f930712012-05-18 22:06:41 -04002443 if (unconf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 status = nfserr_jukebox;
Jeff Layton2216d442012-11-12 15:00:57 -05002446 new = create_client(clname, rqstp, &clverifier);
J. Bruce Fields8f930712012-05-18 22:06:41 -04002447 if (new == NULL)
2448 goto out;
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002449 if (conf && same_verf(&conf->cl_verifier, &clverifier))
J. Bruce Fields63db4632012-05-18 21:54:19 -04002450 /* case 1: probable callback update */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002451 copy_clid(new, conf);
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002452 else /* case 4 (new client) or cases 2, 3 (client reboot): */
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002453 gen_clid(new, nn);
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002454 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002455 gen_callback(new, setclid, rqstp);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002456 add_to_unconfirmed(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2458 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2459 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2460 status = nfs_ok;
2461out:
2462 nfs4_unlock_state();
2463 return status;
2464}
2465
2466
Al Virob37ad282006-10-19 23:28:59 -07002467__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002468nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2469 struct nfsd4_compound_state *cstate,
2470 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471{
NeilBrown21ab45a2005-06-23 22:04:14 -07002472 struct nfs4_client *conf, *unconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2474 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07002475 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03002476 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002478 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479 return nfserr_stale_clientid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002480 nfs4_lock_state();
NeilBrown21ab45a2005-06-23 22:04:14 -07002481
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002482 conf = find_confirmed_client(clid, false, nn);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002483 unconf = find_unconfirmed_client(clid, false, nn);
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002484 /*
J. Bruce Fields8695b902012-05-19 10:05:58 -04002485 * We try hard to give out unique clientid's, so if we get an
2486 * attempt to confirm the same clientid with a different cred,
2487 * there's a bug somewhere. Let's charitably assume it's our
2488 * bug.
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002489 */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002490 status = nfserr_serverfault;
2491 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2492 goto out;
2493 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2494 goto out;
J. Bruce Fields63db4632012-05-18 21:54:19 -04002495 /* cases below refer to rfc 3530 section 14.2.34: */
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002496 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2497 if (conf && !unconf) /* case 2: probable retransmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 status = nfs_ok;
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002499 else /* case 4: client hasn't noticed we rebooted yet? */
2500 status = nfserr_stale_clientid;
2501 goto out;
2502 }
2503 status = nfs_ok;
2504 if (conf) { /* case 1: callback update */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002505 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2506 nfsd4_probe_callback(conf);
2507 expire_client(unconf);
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002508 } else { /* case 3: normal case; new or rebooted client */
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002509 conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002510 if (conf) {
2511 status = mark_client_expired(conf);
2512 if (status)
2513 goto out;
J. Bruce Fields8695b902012-05-19 10:05:58 -04002514 expire_client(conf);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002515 }
J. Bruce Fields8695b902012-05-19 10:05:58 -04002516 move_to_confirmed(unconf);
J. Bruce Fieldsf3d03b92012-05-23 11:38:38 -04002517 nfsd4_probe_callback(unconf);
NeilBrown08e89872005-06-23 22:04:11 -07002518 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 nfs4_unlock_state();
2521 return status;
2522}
2523
J. Bruce Fields32513b42011-10-13 16:00:16 -04002524static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525{
J. Bruce Fields32513b42011-10-13 16:00:16 -04002526 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2527}
2528
2529/* OPEN Share state helper functions */
2530static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2531{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 unsigned int hashval = file_hashval(ino);
2533
J. Bruce Fields32513b42011-10-13 16:00:16 -04002534 atomic_set(&fp->fi_ref, 1);
J. Bruce Fields32513b42011-10-13 16:00:16 -04002535 INIT_LIST_HEAD(&fp->fi_stateids);
2536 INIT_LIST_HEAD(&fp->fi_delegations);
2537 fp->fi_inode = igrab(ino);
2538 fp->fi_had_conflict = false;
2539 fp->fi_lease = NULL;
2540 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2541 memset(fp->fi_access, 0, sizeof(fp->fi_access));
Benny Halevycdc97502014-05-30 09:09:30 -04002542 spin_lock(&state_lock);
Jeff Layton89876f82013-04-02 09:01:59 -04002543 hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
Benny Halevycdc97502014-05-30 09:09:30 -04002544 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545}
2546
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04002547void
NeilBrowne60d4392005-06-23 22:03:01 -07002548nfsd4_free_slabs(void)
2549{
Christoph Hellwigabf11352014-05-21 07:43:03 -07002550 kmem_cache_destroy(openowner_slab);
2551 kmem_cache_destroy(lockowner_slab);
2552 kmem_cache_destroy(file_slab);
2553 kmem_cache_destroy(stateid_slab);
2554 kmem_cache_destroy(deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002555}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556
Bryan Schumaker72083392011-11-01 15:24:59 -04002557int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558nfsd4_init_slabs(void)
2559{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002560 openowner_slab = kmem_cache_create("nfsd4_openowners",
2561 sizeof(struct nfs4_openowner), 0, 0, NULL);
2562 if (openowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002563 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002564 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
Yanchuan Nian3c407942012-10-24 14:44:19 +08002565 sizeof(struct nfs4_lockowner), 0, 0, NULL);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002566 if (lockowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002567 goto out_free_openowner_slab;
NeilBrowne60d4392005-06-23 22:03:01 -07002568 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09002569 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002570 if (file_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002571 goto out_free_lockowner_slab;
NeilBrown5ac049a2005-06-23 22:03:03 -07002572 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002573 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07002574 if (stateid_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002575 goto out_free_file_slab;
NeilBrown5b2d21c2005-06-23 22:03:04 -07002576 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09002577 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002578 if (deleg_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002579 goto out_free_stateid_slab;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580 return 0;
Christoph Hellwigabf11352014-05-21 07:43:03 -07002581
2582out_free_stateid_slab:
2583 kmem_cache_destroy(stateid_slab);
2584out_free_file_slab:
2585 kmem_cache_destroy(file_slab);
2586out_free_lockowner_slab:
2587 kmem_cache_destroy(lockowner_slab);
2588out_free_openowner_slab:
2589 kmem_cache_destroy(openowner_slab);
2590out:
NeilBrowne60d4392005-06-23 22:03:01 -07002591 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2592 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593}
2594
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002595static void init_nfs4_replay(struct nfs4_replay *rp)
2596{
2597 rp->rp_status = nfserr_serverfault;
2598 rp->rp_buflen = 0;
2599 rp->rp_buf = rp->rp_ibuf;
2600}
2601
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002602static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603{
2604 struct nfs4_stateowner *sop;
2605
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002606 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002607 if (!sop)
2608 return NULL;
2609
2610 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2611 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002612 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002613 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002615 sop->so_owner.len = owner->len;
2616
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002617 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002618 sop->so_client = clp;
2619 init_nfs4_replay(&sop->so_replay);
2620 return sop;
2621}
2622
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002623static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002624{
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002625 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2626
2627 list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002628 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629}
2630
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002631static struct nfs4_openowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002633 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002635 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2636 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002638 oo->oo_owner.so_is_open_owner = 1;
2639 oo->oo_owner.so_seqid = open->op_seqid;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04002640 oo->oo_flags = NFS4_OO_NEW;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002641 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04002642 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002643 INIT_LIST_HEAD(&oo->oo_close_lru);
2644 hash_openowner(oo, clp, strhashval);
2645 return oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002646}
2647
J. Bruce Fields996e0932011-10-17 11:14:48 -04002648static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002649 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002650
J. Bruce Fields3abdb602013-02-03 12:23:01 -05002651 stp->st_stid.sc_type = NFS4_OPEN_STID;
NeilBrownea1da632005-06-23 22:04:17 -07002652 INIT_LIST_HEAD(&stp->st_lockowners);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002653 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
NeilBrown8beefa22005-06-23 22:03:08 -07002654 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002655 stp->st_stateowner = &oo->oo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07002656 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657 stp->st_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658 stp->st_access_bmap = 0;
2659 stp->st_deny_bmap = 0;
Jeff Layton82c5ff12012-05-11 09:45:13 -04002660 set_access(open->op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04002661 set_deny(open->op_share_deny, stp);
NeilBrown4c4cd222005-07-07 17:59:27 -07002662 stp->st_openstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663}
2664
2665static void
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002666move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667{
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002668 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2669
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002670 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002671
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002672 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002673 oo->oo_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674}
2675
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002677same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2678 clientid_t *clid)
2679{
2680 return (sop->so_owner.len == owner->len) &&
2681 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2682 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683}
2684
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002685static struct nfs4_openowner *
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002686find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
2687 bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688{
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002689 struct nfs4_stateowner *so;
2690 struct nfs4_openowner *oo;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002691 struct nfs4_client *clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002693 list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002694 if (!so->so_is_open_owner)
2695 continue;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002696 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2697 oo = openowner(so);
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002698 clp = oo->oo_owner.so_client;
2699 if ((bool)clp->cl_minorversion != sessions)
2700 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002701 renew_client(oo->oo_owner.so_client);
2702 return oo;
2703 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002704 }
2705 return NULL;
2706}
2707
2708/* search file_hashtbl[] for file */
2709static struct nfs4_file *
2710find_file(struct inode *ino)
2711{
2712 unsigned int hashval = file_hashval(ino);
2713 struct nfs4_file *fp;
2714
Benny Halevycdc97502014-05-30 09:09:30 -04002715 spin_lock(&state_lock);
Jeff Layton89876f82013-04-02 09:01:59 -04002716 hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
NeilBrown13cd2182005-06-23 22:03:10 -07002717 if (fp->fi_inode == ino) {
2718 get_nfs4_file(fp);
Benny Halevycdc97502014-05-30 09:09:30 -04002719 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07002721 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 }
Benny Halevycdc97502014-05-30 09:09:30 -04002723 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 return NULL;
2725}
2726
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04002727/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002728 * Called to check deny when READ with all zero stateid or
2729 * WRITE with all zero or all one stateid
2730 */
Al Virob37ad282006-10-19 23:28:59 -07002731static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2733{
2734 struct inode *ino = current_fh->fh_dentry->d_inode;
2735 struct nfs4_file *fp;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002736 struct nfs4_ol_stateid *stp;
Al Virob37ad282006-10-19 23:28:59 -07002737 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002738
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07002740 if (!fp)
2741 return nfs_ok;
NeilBrownb7009492005-07-07 17:59:23 -07002742 ret = nfserr_locked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 /* Search for conflicting share reservations */
NeilBrown13cd2182005-06-23 22:03:10 -07002744 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
Jeff Laytonce0fc432012-05-11 09:45:14 -04002745 if (test_deny(deny_type, stp) ||
2746 test_deny(NFS4_SHARE_DENY_BOTH, stp))
NeilBrown13cd2182005-06-23 22:03:10 -07002747 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748 }
NeilBrown13cd2182005-06-23 22:03:10 -07002749 ret = nfs_ok;
2750out:
2751 put_nfs4_file(fp);
2752 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753}
2754
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002755static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002756{
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04002757 struct nfs4_client *clp = dp->dl_stid.sc_client;
2758 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2759
Benny Halevycdc97502014-05-30 09:09:30 -04002760 lockdep_assert_held(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761 /* We're assuming the state code never drops its reference
2762 * without first removing the lease. Since we're in this lease
2763 * callback (and since the lease code is serialized by the kernel
2764 * lock) we know the server hasn't removed the lease yet, we know
2765 * it's safe to take a reference: */
2766 atomic_inc(&dp->dl_count);
2767
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04002768 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769
Jeff Layton1c8c6012013-06-21 08:58:15 -04002770 /* Only place dl_time is set; protected by i_lock: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 dp->dl_time = get_seconds();
2772
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002773 nfsd4_cb_recall(dp);
2774}
2775
Jeff Layton1c8c6012013-06-21 08:58:15 -04002776/* Called from break_lease() with i_lock held. */
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002777static void nfsd_break_deleg_cb(struct file_lock *fl)
2778{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002779 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
2780 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002781
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04002782 if (!fp) {
2783 WARN(1, "(%p)->fl_owner NULL\n", fl);
2784 return;
2785 }
2786 if (fp->fi_had_conflict) {
2787 WARN(1, "duplicate break on %p\n", fp);
2788 return;
2789 }
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002790 /*
2791 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002792 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002793 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002794 */
2795 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796
Benny Halevycdc97502014-05-30 09:09:30 -04002797 spin_lock(&state_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002798 fp->fi_had_conflict = true;
2799 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
2800 nfsd_break_one_deleg(dp);
Benny Halevycdc97502014-05-30 09:09:30 -04002801 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802}
2803
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804static
2805int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2806{
2807 if (arg & F_UNLCK)
2808 return lease_modify(onlist, arg);
2809 else
2810 return -EAGAIN;
2811}
2812
Alexey Dobriyan7b021962009-09-21 17:01:12 -07002813static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04002814 .lm_break = nfsd_break_deleg_cb,
2815 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002816};
2817
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04002818static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
2819{
2820 if (nfsd4_has_session(cstate))
2821 return nfs_ok;
2822 if (seqid == so->so_seqid - 1)
2823 return nfserr_replay_me;
2824 if (seqid == so->so_seqid)
2825 return nfs_ok;
2826 return nfserr_bad_seqid;
2827}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828
Al Virob37ad282006-10-19 23:28:59 -07002829__be32
Andy Adamson66689582009-04-03 08:28:45 +03002830nfsd4_process_open1(struct nfsd4_compound_state *cstate,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03002831 struct nfsd4_open *open, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833 clientid_t *clientid = &open->op_clientid;
2834 struct nfs4_client *clp = NULL;
2835 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002836 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002837 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002839 if (STALE_CLIENTID(&open->op_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04002841 /*
2842 * In case we need it later, after we've already created the
2843 * file and don't want to risk a further failure:
2844 */
2845 open->op_file = nfsd4_alloc_file();
2846 if (open->op_file == NULL)
2847 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002849 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002850 oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002851 open->op_openowner = oo;
2852 if (!oo) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002853 clp = find_confirmed_client(clientid, cstate->minorversion,
2854 nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002855 if (clp == NULL)
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002856 return nfserr_expired;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002857 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002859 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002860 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002861 clp = oo->oo_owner.so_client;
2862 release_openowner(oo);
2863 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002864 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002865 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002866 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
2867 if (status)
2868 return status;
2869 clp = oo->oo_owner.so_client;
2870 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002871new_owner:
2872 oo = alloc_init_open_stateowner(strhashval, clp, open);
2873 if (oo == NULL)
2874 return nfserr_jukebox;
2875 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002876alloc_stateid:
2877 open->op_stp = nfs4_alloc_stateid(clp);
2878 if (!open->op_stp)
2879 return nfserr_jukebox;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002880 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881}
2882
Al Virob37ad282006-10-19 23:28:59 -07002883static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07002884nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
2885{
2886 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
2887 return nfserr_openmode;
2888 else
2889 return nfs_ok;
2890}
2891
Daniel Mackc47d8322011-05-16 16:38:14 +02002892static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04002893{
J. Bruce Fields24a01112010-05-18 20:01:35 -04002894 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
2895}
2896
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002897static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002898{
2899 struct nfs4_stid *ret;
2900
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002901 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002902 if (!ret)
2903 return NULL;
2904 return delegstateid(ret);
2905}
2906
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002907static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
2908{
2909 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
2910 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
2911}
2912
Al Virob37ad282006-10-19 23:28:59 -07002913static __be32
J. Bruce Fields41d22662013-03-21 15:49:47 -04002914nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07002915 struct nfs4_delegation **dp)
2916{
2917 int flags;
Al Virob37ad282006-10-19 23:28:59 -07002918 __be32 status = nfserr_bad_stateid;
NeilBrown567d9822005-06-23 22:02:53 -07002919
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002920 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
NeilBrown567d9822005-06-23 22:02:53 -07002921 if (*dp == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07002922 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04002923 flags = share_access_to_flags(open->op_share_access);
NeilBrown567d9822005-06-23 22:02:53 -07002924 status = nfs4_check_delegmode(*dp, flags);
2925 if (status)
2926 *dp = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002927out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002928 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07002929 return nfs_ok;
2930 if (status)
2931 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002932 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002933 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07002934}
2935
Al Virob37ad282006-10-19 23:28:59 -07002936static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002937nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002939 struct nfs4_ol_stateid *local;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002940 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002941
NeilBrown8beefa22005-06-23 22:03:08 -07002942 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 /* ignore lock owners */
2944 if (local->st_stateowner->so_is_open_owner == 0)
2945 continue;
2946 /* remember if we have seen this open owner */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002947 if (local->st_stateowner == &oo->oo_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948 *stpp = local;
2949 /* check for conflicting share reservations */
2950 if (!test_share(local, open))
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002951 return nfserr_share_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952 }
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002953 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954}
2955
J. Bruce Fields21fb4012010-07-28 12:21:23 -04002956static inline int nfs4_access_to_access(u32 nfs4_access)
2957{
2958 int flags = 0;
2959
2960 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
2961 flags |= NFSD_MAY_READ;
2962 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
2963 flags |= NFSD_MAY_WRITE;
2964 return flags;
2965}
2966
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002967static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
2968 struct svc_fh *cur_fh, struct nfsd4_open *open)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002969{
2970 __be32 status;
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002971 int oflag = nfs4_access_to_omode(open->op_share_access);
2972 int access = nfs4_access_to_access(open->op_share_access);
2973
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002974 if (!fp->fi_fds[oflag]) {
2975 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
2976 &fp->fi_fds[oflag]);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002977 if (status)
2978 return status;
2979 }
2980 nfs4_file_get_access(fp, oflag);
2981
2982 return nfs_ok;
2983}
2984
Al Virob37ad282006-10-19 23:28:59 -07002985static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
2987 struct nfsd4_open *open)
2988{
2989 struct iattr iattr = {
2990 .ia_valid = ATTR_SIZE,
2991 .ia_size = 0,
2992 };
2993 if (!open->op_truncate)
2994 return 0;
2995 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08002996 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
2998}
2999
Al Virob37ad282006-10-19 23:28:59 -07003000static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003001nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002{
J. Bruce Fieldsb6d2f1c2011-10-10 17:44:19 -04003003 u32 op_share_access = open->op_share_access;
J. Bruce Fields7d947842010-08-20 18:09:31 -04003004 bool new_access;
Al Virob37ad282006-10-19 23:28:59 -07003005 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003006
Jeff Layton82c5ff12012-05-11 09:45:13 -04003007 new_access = !test_access(op_share_access, stp);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003008 if (new_access) {
Casey Bodley0c12eaf2011-07-23 14:58:10 -04003009 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003010 if (status)
3011 return status;
J. Bruce Fields6c26d082006-01-18 17:43:38 -08003012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 status = nfsd4_truncate(rqstp, cur_fh, open);
3014 if (status) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003015 if (new_access) {
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003016 int oflag = nfs4_access_to_omode(op_share_access);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003017 nfs4_file_put_access(fp, oflag);
3018 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019 return status;
3020 }
3021 /* remember the open */
Jeff Layton82c5ff12012-05-11 09:45:13 -04003022 set_access(op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04003023 set_deny(open->op_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003024
3025 return nfs_ok;
3026}
3027
3028
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029static void
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003030nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031{
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003032 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003033}
3034
J. Bruce Fields14a24e92010-12-10 19:02:49 -05003035/* Should we give out recallable state?: */
3036static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3037{
3038 if (clp->cl_cb_state == NFSD4_CB_UP)
3039 return true;
3040 /*
3041 * In the sessions case, since we don't have to establish a
3042 * separate connection for callbacks, we assume it's OK
3043 * until we hear otherwise:
3044 */
3045 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3046}
3047
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003048static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
3049{
3050 struct file_lock *fl;
3051
3052 fl = locks_alloc_lock();
3053 if (!fl)
3054 return NULL;
3055 locks_init_lock(fl);
3056 fl->fl_lmops = &nfsd_lease_mng_ops;
J. Bruce Fields617588d2011-07-01 15:18:34 -04003057 fl->fl_flags = FL_DELEG;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003058 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3059 fl->fl_end = OFFSET_MAX;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003060 fl->fl_owner = (fl_owner_t)(dp->dl_file);
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003061 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003062 return fl;
3063}
3064
J. Bruce Fields99c41512013-05-21 16:21:25 -04003065static int nfs4_setlease(struct nfs4_delegation *dp)
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003066{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003067 struct nfs4_file *fp = dp->dl_file;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003068 struct file_lock *fl;
3069 int status;
3070
J. Bruce Fields99c41512013-05-21 16:21:25 -04003071 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003072 if (!fl)
3073 return -ENOMEM;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003074 fl->fl_file = find_readable_file(fp);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003075 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
J. Bruce Fieldse8730882012-01-23 13:52:01 -05003076 if (status)
3077 goto out_free;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003078 fp->fi_lease = fl;
Al Virocb0942b2012-08-27 14:48:26 -04003079 fp->fi_deleg_file = get_file(fl->fl_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003080 atomic_set(&fp->fi_delegees, 1);
Benny Halevycdc97502014-05-30 09:09:30 -04003081 spin_lock(&state_lock);
Benny Halevy931ee562014-05-30 09:09:27 -04003082 hash_delegation_locked(dp, fp);
Benny Halevycdc97502014-05-30 09:09:30 -04003083 spin_unlock(&state_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003084 return 0;
J. Bruce Fieldse8730882012-01-23 13:52:01 -05003085out_free:
3086 locks_free_lock(fl);
3087 return status;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003088}
3089
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003090static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003091{
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003092 if (fp->fi_had_conflict)
3093 return -EAGAIN;
3094 get_nfs4_file(fp);
3095 dp->dl_file = fp;
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003096 if (!fp->fi_lease)
3097 return nfs4_setlease(dp);
Benny Halevycdc97502014-05-30 09:09:30 -04003098 spin_lock(&state_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003099 atomic_inc(&fp->fi_delegees);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003100 if (fp->fi_had_conflict) {
Benny Halevycdc97502014-05-30 09:09:30 -04003101 spin_unlock(&state_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003102 return -EAGAIN;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003103 }
Benny Halevy931ee562014-05-30 09:09:27 -04003104 hash_delegation_locked(dp, fp);
Benny Halevycdc97502014-05-30 09:09:30 -04003105 spin_unlock(&state_lock);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003106 return 0;
3107}
3108
Benny Halevy4aa89132012-02-21 14:16:44 -08003109static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
3110{
3111 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3112 if (status == -EAGAIN)
3113 open->op_why_no_deleg = WND4_CONTENTION;
3114 else {
3115 open->op_why_no_deleg = WND4_RESOURCE;
3116 switch (open->op_deleg_want) {
3117 case NFS4_SHARE_WANT_READ_DELEG:
3118 case NFS4_SHARE_WANT_WRITE_DELEG:
3119 case NFS4_SHARE_WANT_ANY_DELEG:
3120 break;
3121 case NFS4_SHARE_WANT_CANCEL:
3122 open->op_why_no_deleg = WND4_CANCELLED;
3123 break;
3124 case NFS4_SHARE_WANT_NO_DELEG:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003125 WARN_ON_ONCE(1);
Benny Halevy4aa89132012-02-21 14:16:44 -08003126 }
3127 }
3128}
3129
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130/*
3131 * Attempt to hand out a delegation.
J. Bruce Fields99c41512013-05-21 16:21:25 -04003132 *
3133 * Note we don't support write delegations, and won't until the vfs has
3134 * proper support for them.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135 */
3136static void
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003137nfs4_open_delegation(struct net *net, struct svc_fh *fh,
3138 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139{
3140 struct nfs4_delegation *dp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003141 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
J. Bruce Fields14a24e92010-12-10 19:02:49 -05003142 int cb_up;
J. Bruce Fields99c41512013-05-21 16:21:25 -04003143 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003145 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
NeilBrown7b190fe2005-06-23 22:03:23 -07003146 open->op_recall = 0;
3147 switch (open->op_claim_type) {
3148 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05003149 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07003150 open->op_recall = 1;
J. Bruce Fields99c41512013-05-21 16:21:25 -04003151 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
3152 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003153 break;
3154 case NFS4_OPEN_CLAIM_NULL:
Ming Chened47b062014-01-09 21:26:10 +00003155 case NFS4_OPEN_CLAIM_FH:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003156 /*
3157 * Let's not give out any delegations till everyone's
3158 * had the chance to reclaim theirs....
3159 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003160 if (locks_in_grace(net))
J. Bruce Fields99c41512013-05-21 16:21:25 -04003161 goto out_no_deleg;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003162 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields99c41512013-05-21 16:21:25 -04003163 goto out_no_deleg;
Steve Dickson9a0590a2013-05-15 14:51:49 -04003164 /*
3165 * Also, if the file was opened for write or
3166 * create, there's a good chance the client's
3167 * about to write to it, resulting in an
3168 * immediate recall (since we don't support
3169 * write delegations):
3170 */
NeilBrown7b190fe2005-06-23 22:03:23 -07003171 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields99c41512013-05-21 16:21:25 -04003172 goto out_no_deleg;
3173 if (open->op_create == NFS4_OPEN_CREATE)
3174 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003175 break;
3176 default:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003177 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003178 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04003179 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003180 if (dp == NULL)
3181 goto out_no_deleg;
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003182 status = nfs4_set_delegation(dp, stp->st_file);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003183 if (status)
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003184 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003186 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003188 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003189 STATEID_VAL(&dp->dl_stid.sc_stateid));
J. Bruce Fields99c41512013-05-21 16:21:25 -04003190 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003191 return;
3192out_free:
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003193 destroy_delegation(dp);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003194out_no_deleg:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003195 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
3196 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04003197 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
J. Bruce Fields99c41512013-05-21 16:21:25 -04003198 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04003199 open->op_recall = 1;
3200 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04003201
3202 /* 4.1 client asking for a delegation? */
3203 if (open->op_deleg_want)
3204 nfsd4_open_deleg_none_ext(open, status);
3205 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206}
3207
Benny Halevye27f49c2012-02-21 14:16:54 -08003208static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
3209 struct nfs4_delegation *dp)
3210{
3211 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
3212 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3213 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3214 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
3215 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
3216 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3217 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3218 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
3219 }
3220 /* Otherwise the client must be confused wanting a delegation
3221 * it already has, therefore we don't return
3222 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3223 */
3224}
3225
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226/*
3227 * called with nfs4_lock_state() held.
3228 */
Al Virob37ad282006-10-19 23:28:59 -07003229__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
3231{
Andy Adamson66689582009-04-03 08:28:45 +03003232 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003233 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234 struct nfs4_file *fp = NULL;
3235 struct inode *ino = current_fh->fh_dentry->d_inode;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003236 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07003237 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003238 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003239
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 /*
3241 * Lookup file; if found, lookup stateid and check open request,
3242 * and check for delegations in the process of being recalled.
3243 * If not found, create the nfs4_file struct
3244 */
3245 fp = find_file(ino);
3246 if (fp) {
3247 if ((status = nfs4_check_open(fp, open, &stp)))
3248 goto out;
J. Bruce Fields41d22662013-03-21 15:49:47 -04003249 status = nfs4_check_deleg(cl, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07003250 if (status)
3251 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252 } else {
NeilBrownc44c5ee2005-06-23 22:02:54 -07003253 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003254 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07003255 goto out;
J. Bruce Fields3e772462011-08-10 19:07:33 -04003256 status = nfserr_jukebox;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003257 fp = open->op_file;
3258 open->op_file = NULL;
3259 nfsd4_init_file(fp, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260 }
3261
3262 /*
3263 * OPEN the file, or upgrade an existing OPEN.
3264 * If truncate fails, the OPEN fails.
3265 */
3266 if (stp) {
3267 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003268 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269 if (status)
3270 goto out;
3271 } else {
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003272 status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
NeilBrown567d9822005-06-23 22:02:53 -07003273 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274 goto out;
J. Bruce Fields4af82502012-06-07 17:30:45 -04003275 status = nfsd4_truncate(rqstp, current_fh, open);
3276 if (status)
3277 goto out;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003278 stp = open->op_stp;
3279 open->op_stp = NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04003280 init_open_stateid(stp, fp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003281 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003282 update_stateid(&stp->st_stid.sc_stateid);
3283 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003284
Benny Halevyd24433c2012-02-16 20:57:17 +02003285 if (nfsd4_has_session(&resp->cstate)) {
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003286 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Andy Adamson66689582009-04-03 08:28:45 +03003287
Benny Halevyd24433c2012-02-16 20:57:17 +02003288 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3289 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3290 open->op_why_no_deleg = WND4_NOT_WANTED;
3291 goto nodeleg;
3292 }
3293 }
3294
Linus Torvalds1da177e2005-04-16 15:20:36 -07003295 /*
3296 * Attempt to hand out a delegation. No error return, because the
3297 * OPEN succeeds even if we fail.
3298 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003299 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003300nodeleg:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301 status = nfs_ok;
3302
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003303 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003304 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003305out:
Benny Halevyd24433c2012-02-16 20:57:17 +02003306 /* 4.1 client trying to upgrade/downgrade delegation? */
3307 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
Benny Halevye27f49c2012-02-21 14:16:54 -08003308 open->op_deleg_want)
3309 nfsd4_deleg_xgrade_none_ext(open, dp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003310
NeilBrown13cd2182005-06-23 22:03:10 -07003311 if (fp)
3312 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07003313 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003314 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315 /*
3316 * To finish the open response, we just need to set the rflags.
3317 */
3318 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003319 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03003320 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3322
3323 return status;
3324}
3325
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003326void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3327{
3328 if (open->op_openowner) {
3329 struct nfs4_openowner *oo = open->op_openowner;
3330
3331 if (!list_empty(&oo->oo_owner.so_stateids))
3332 list_del_init(&oo->oo_close_lru);
3333 if (oo->oo_flags & NFS4_OO_NEW) {
3334 if (status) {
3335 release_openowner(oo);
3336 open->op_openowner = NULL;
3337 } else
3338 oo->oo_flags &= ~NFS4_OO_NEW;
3339 }
3340 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04003341 if (open->op_file)
3342 nfsd4_free_file(open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003343 if (open->op_stp)
J. Bruce Fieldsef798592012-08-29 10:32:54 -07003344 free_generic_stateid(open->op_stp);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003345}
3346
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05003347static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp)
3348{
3349 struct nfs4_client *found;
3350
3351 if (STALE_CLIENTID(clid, nn))
3352 return nfserr_stale_clientid;
3353 found = find_confirmed_client(clid, session, nn);
3354 if (clp)
3355 *clp = found;
3356 return found ? nfs_ok : nfserr_expired;
3357}
3358
Al Virob37ad282006-10-19 23:28:59 -07003359__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003360nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3361 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362{
3363 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07003364 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03003365 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366
3367 nfs4_lock_state();
3368 dprintk("process_renew(%08x/%08x): starting\n",
3369 clid->cl_boot, clid->cl_id);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05003370 status = lookup_clientid(clid, cstate->minorversion, nn, &clp);
3371 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07003374 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04003375 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003376 goto out;
3377 status = nfs_ok;
3378out:
3379 nfs4_unlock_state();
3380 return status;
3381}
3382
NeilBrowna76b4312005-06-23 22:04:01 -07003383static void
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003384nfsd4_end_grace(struct nfsd_net *nn)
NeilBrowna76b4312005-06-23 22:04:01 -07003385{
Jeff Layton33dcc482012-04-10 11:08:48 -04003386 /* do nothing if grace period already ended */
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003387 if (nn->grace_ended)
Jeff Layton33dcc482012-04-10 11:08:48 -04003388 return;
3389
NeilBrowna76b4312005-06-23 22:04:01 -07003390 dprintk("NFSD: end of grace period\n");
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003391 nn->grace_ended = true;
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003392 nfsd4_record_grace_done(nn, nn->boot_time);
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003393 locks_end_grace(&nn->nfsd4_manager);
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05003394 /*
3395 * Now that every NFSv4 client has had the chance to recover and
3396 * to see the (possibly new, possibly shorter) lease time, we
3397 * can safely set the next grace time to the current lease time:
3398 */
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03003399 nn->nfsd4_grace = nn->nfsd4_lease;
NeilBrowna76b4312005-06-23 22:04:01 -07003400}
3401
NeilBrownfd39ca92005-06-23 22:04:03 -07003402static time_t
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003403nfs4_laundromat(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404{
3405 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003406 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407 struct nfs4_delegation *dp;
3408 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03003409 time_t cutoff = get_seconds() - nn->nfsd4_lease;
Jeff Laytona832e7a2014-05-30 09:09:26 -04003410 time_t t, new_timeo = nn->nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003411
3412 nfs4_lock_state();
3413
3414 dprintk("NFSD: laundromat service - starting\n");
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003415 nfsd4_end_grace(nn);
Benny Halevy36acb662010-05-12 00:13:04 +03003416 INIT_LIST_HEAD(&reaplist);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03003417 spin_lock(&nn->client_lock);
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03003418 list_for_each_safe(pos, next, &nn->client_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003419 clp = list_entry(pos, struct nfs4_client, cl_lru);
3420 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3421 t = clp->cl_time - cutoff;
Jeff Laytona832e7a2014-05-30 09:09:26 -04003422 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003423 break;
3424 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003425 if (mark_client_expired_locked(clp)) {
Benny Halevyd7682982010-05-12 00:13:54 +03003426 dprintk("NFSD: client in use (clientid %08x)\n",
3427 clp->cl_clientid.cl_id);
3428 continue;
3429 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003430 list_move(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03003431 }
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03003432 spin_unlock(&nn->client_lock);
Benny Halevy36acb662010-05-12 00:13:04 +03003433 list_for_each_safe(pos, next, &reaplist) {
3434 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003435 dprintk("NFSD: purging unused client (clientid %08x)\n",
3436 clp->cl_clientid.cl_id);
3437 expire_client(clp);
3438 }
Benny Halevycdc97502014-05-30 09:09:30 -04003439 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04003440 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Stanislav Kinsbursky4e37a7c22012-11-26 15:22:03 +03003442 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
3443 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04003445 t = dp->dl_time - cutoff;
3446 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003447 break;
3448 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449 list_move(&dp->dl_recall_lru, &reaplist);
3450 }
Benny Halevycdc97502014-05-30 09:09:30 -04003451 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452 list_for_each_safe(pos, next, &reaplist) {
3453 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003454 revoke_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003455 }
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003456 list_for_each_safe(pos, next, &nn->close_lru) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003457 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3458 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04003459 t = oo->oo_time - cutoff;
3460 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003461 break;
3462 }
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003463 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003464 }
Jeff Laytona832e7a2014-05-30 09:09:26 -04003465 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003466 nfs4_unlock_state();
Jeff Laytona832e7a2014-05-30 09:09:26 -04003467 return new_timeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003468}
3469
Harvey Harrisona254b242008-02-20 12:49:00 -08003470static struct workqueue_struct *laundry_wq;
3471static void laundromat_main(struct work_struct *);
Harvey Harrisona254b242008-02-20 12:49:00 -08003472
3473static void
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003474laundromat_main(struct work_struct *laundry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475{
3476 time_t t;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003477 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
3478 work);
3479 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
3480 laundromat_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003481
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003482 t = nfs4_laundromat(nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003483 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003484 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003485}
3486
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003487static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07003488{
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003489 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3490 return nfserr_bad_stateid;
3491 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492}
3493
Linus Torvalds1da177e2005-04-16 15:20:36 -07003494static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003495access_permit_read(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003496{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003497 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3498 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3499 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500}
3501
3502static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003503access_permit_write(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003505 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3506 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507}
3508
3509static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003510__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003511{
Al Virob37ad282006-10-19 23:28:59 -07003512 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003513
J. Bruce Fields02921912010-07-29 15:16:59 -04003514 /* For lock stateid's, we test the parent open, not the lock: */
3515 if (stp->st_openstp)
3516 stp = stp->st_openstp;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003517 if ((flags & WR_STATE) && !access_permit_write(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003518 goto out;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003519 if ((flags & RD_STATE) && !access_permit_read(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003520 goto out;
3521 status = nfs_ok;
3522out:
3523 return status;
3524}
3525
Al Virob37ad282006-10-19 23:28:59 -07003526static inline __be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003527check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003528{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003529 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003530 return nfs_ok;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003531 else if (locks_in_grace(net)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003532 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003533 * conflicting state; so we must wait out the grace period. */
3534 return nfserr_grace;
3535 } else if (flags & WR_STATE)
3536 return nfs4_share_conflict(current_fh,
3537 NFS4_SHARE_DENY_WRITE);
3538 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3539 return nfs4_share_conflict(current_fh,
3540 NFS4_SHARE_DENY_READ);
3541}
3542
3543/*
3544 * Allow READ/WRITE during grace period on recovered state only for files
3545 * that are not able to provide mandatory locking.
3546 */
3547static inline int
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003548grace_disallows_io(struct net *net, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549{
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003550 return locks_in_grace(net) && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003551}
3552
J. Bruce Fields81b82962011-08-23 11:03:29 -04003553/* Returns true iff a is later than b: */
3554static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3555{
Jim Rees1a9357f2013-05-17 17:33:00 -04003556 return (s32)(a->si_generation - b->si_generation) > 0;
J. Bruce Fields81b82962011-08-23 11:03:29 -04003557}
3558
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003559static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05003560{
Andy Adamson66689582009-04-03 08:28:45 +03003561 /*
3562 * When sessions are used the stateid generation number is ignored
3563 * when it is zero.
3564 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04003565 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04003566 return nfs_ok;
3567
3568 if (in->si_generation == ref->si_generation)
3569 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03003570
J. Bruce Fields0836f582008-01-26 19:08:12 -05003571 /* If the client sends us a stateid from the future, it's buggy: */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003572 if (stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05003573 return nfserr_bad_stateid;
3574 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04003575 * However, we could see a stateid from the past, even from a
3576 * non-buggy client. For example, if the client sends a lock
3577 * while some IO is outstanding, the lock may bump si_generation
3578 * while the IO is still in flight. The client could avoid that
3579 * situation by waiting for responses on all the IO requests,
3580 * but better performance may result in retrying IO that
3581 * receives an old_stateid error if requests are rarely
3582 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05003583 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003584 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05003585}
3586
Chuck Lever7df302f2012-05-29 13:56:37 -04003587static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04003588{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003589 struct nfs4_stid *s;
3590 struct nfs4_ol_stateid *ols;
3591 __be32 status;
Bryan Schumaker17456802011-07-13 10:50:48 -04003592
Chuck Lever7df302f2012-05-29 13:56:37 -04003593 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3594 return nfserr_bad_stateid;
3595 /* Client debugging aid. */
3596 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
3597 char addr_str[INET6_ADDRSTRLEN];
3598 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
3599 sizeof(addr_str));
3600 pr_warn_ratelimited("NFSD: client %s testing state ID "
3601 "with incorrect client ID\n", addr_str);
3602 return nfserr_bad_stateid;
3603 }
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003604 s = find_stateid(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003605 if (!s)
Chuck Lever7df302f2012-05-29 13:56:37 -04003606 return nfserr_bad_stateid;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04003607 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04003608 if (status)
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003609 return status;
J. Bruce Fields23340032013-04-09 17:42:28 -04003610 switch (s->sc_type) {
3611 case NFS4_DELEG_STID:
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003612 return nfs_ok;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003613 case NFS4_REVOKED_DELEG_STID:
3614 return nfserr_deleg_revoked;
J. Bruce Fields23340032013-04-09 17:42:28 -04003615 case NFS4_OPEN_STID:
3616 case NFS4_LOCK_STID:
3617 ols = openlockstateid(s);
3618 if (ols->st_stateowner->so_is_open_owner
3619 && !(openowner(ols->st_stateowner)->oo_flags
3620 & NFS4_OO_CONFIRMED))
3621 return nfserr_bad_stateid;
3622 return nfs_ok;
3623 default:
3624 printk("unknown stateid type %x\n", s->sc_type);
3625 case NFS4_CLOSED_STID:
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003626 return nfserr_bad_stateid;
J. Bruce Fields23340032013-04-09 17:42:28 -04003627 }
Bryan Schumaker17456802011-07-13 10:50:48 -04003628}
3629
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003630static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,
3631 struct nfs4_stid **s, bool sessions,
3632 struct nfsd_net *nn)
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003633{
3634 struct nfs4_client *cl;
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003635 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003636
3637 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3638 return nfserr_bad_stateid;
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003639 status = lookup_clientid(&stateid->si_opaque.so_clid, sessions,
3640 nn, &cl);
Trond Myklebusta8a7c672014-03-29 14:43:38 -04003641 if (status == nfserr_stale_clientid) {
3642 if (sessions)
3643 return nfserr_bad_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003644 return nfserr_stale_stateid;
Trond Myklebusta8a7c672014-03-29 14:43:38 -04003645 }
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003646 if (status)
3647 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003648 *s = find_stateid_by_type(cl, stateid, typemask);
3649 if (!*s)
3650 return nfserr_bad_stateid;
3651 return nfs_ok;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003652}
3653
Linus Torvalds1da177e2005-04-16 15:20:36 -07003654/*
3655* Checks for stateid operations
3656*/
Al Virob37ad282006-10-19 23:28:59 -07003657__be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003658nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
Benny Halevydd453df2009-04-03 08:28:41 +03003659 stateid_t *stateid, int flags, struct file **filpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660{
J. Bruce Fields69064a22011-09-09 11:54:57 -04003661 struct nfs4_stid *s;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003662 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003663 struct nfs4_delegation *dp = NULL;
Benny Halevydd453df2009-04-03 08:28:41 +03003664 struct svc_fh *current_fh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665 struct inode *ino = current_fh->fh_dentry->d_inode;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003666 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Trond Myklebust14bcab12014-04-18 14:44:07 -04003667 struct file *file = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003668 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670 if (filpp)
3671 *filpp = NULL;
3672
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003673 if (grace_disallows_io(net, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674 return nfserr_grace;
3675
3676 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003677 return check_special_stateids(net, current_fh, stateid, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678
Trond Myklebust14bcab12014-04-18 14:44:07 -04003679 nfs4_lock_state();
3680
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003681 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
3682 &s, cstate->minorversion, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003683 if (status)
Trond Myklebust14bcab12014-04-18 14:44:07 -04003684 goto out;
J. Bruce Fields69064a22011-09-09 11:54:57 -04003685 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
3686 if (status)
3687 goto out;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003688 switch (s->sc_type) {
3689 case NFS4_DELEG_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003690 dp = delegstateid(s);
J. Bruce Fieldsdc9bf702009-02-21 11:14:43 -08003691 status = nfs4_check_delegmode(dp, flags);
3692 if (status)
3693 goto out;
Dan Carpenter43b01782010-10-27 23:19:04 +02003694 if (filpp) {
Trond Myklebust14bcab12014-04-18 14:44:07 -04003695 file = dp->dl_file->fi_deleg_file;
3696 if (!file) {
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003697 WARN_ON_ONCE(1);
3698 status = nfserr_serverfault;
3699 goto out;
3700 }
Dan Carpenter43b01782010-10-27 23:19:04 +02003701 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003702 break;
3703 case NFS4_OPEN_STID:
3704 case NFS4_LOCK_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003705 stp = openlockstateid(s);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003706 status = nfs4_check_fh(current_fh, stp);
3707 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003708 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003709 if (stp->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003710 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711 goto out;
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003712 status = nfs4_check_openmode(stp, flags);
3713 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003715 if (filpp) {
3716 if (flags & RD_STATE)
Trond Myklebust14bcab12014-04-18 14:44:07 -04003717 file = find_readable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003718 else
Trond Myklebust14bcab12014-04-18 14:44:07 -04003719 file = find_writeable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003720 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003721 break;
3722 default:
Trond Myklebust14bcab12014-04-18 14:44:07 -04003723 status = nfserr_bad_stateid;
3724 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725 }
3726 status = nfs_ok;
Trond Myklebust14bcab12014-04-18 14:44:07 -04003727 if (file)
3728 *filpp = get_file(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729out:
Trond Myklebust14bcab12014-04-18 14:44:07 -04003730 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003731 return status;
3732}
3733
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003734static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003735nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003736{
J. Bruce Fieldsa1b8ff42014-05-20 15:55:21 -04003737 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
3738
3739 if (check_for_locks(stp->st_file, lo))
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003740 return nfserr_locks_held;
J. Bruce Fieldsa1b8ff42014-05-20 15:55:21 -04003741 /*
3742 * Currently there's a 1-1 lock stateid<->lockowner
3743 * correspondance, and we have to delete the lockowner when we
3744 * delete the lock stateid:
3745 */
3746 unhash_lockowner(lo);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003747 return nfs_ok;
3748}
3749
3750/*
Bryan Schumaker17456802011-07-13 10:50:48 -04003751 * Test if the stateid is valid
3752 */
3753__be32
3754nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3755 struct nfsd4_test_stateid *test_stateid)
3756{
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003757 struct nfsd4_test_stateid_id *stateid;
3758 struct nfs4_client *cl = cstate->session->se_client;
3759
3760 nfs4_lock_state();
3761 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
Chuck Lever7df302f2012-05-29 13:56:37 -04003762 stateid->ts_id_status =
3763 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003764 nfs4_unlock_state();
3765
Bryan Schumaker17456802011-07-13 10:50:48 -04003766 return nfs_ok;
3767}
3768
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003769__be32
3770nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3771 struct nfsd4_free_stateid *free_stateid)
3772{
3773 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003774 struct nfs4_stid *s;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003775 struct nfs4_delegation *dp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003776 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003777 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003778
3779 nfs4_lock_state();
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003780 s = find_stateid(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003781 if (!s)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003782 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003783 switch (s->sc_type) {
3784 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003785 ret = nfserr_locks_held;
3786 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003787 case NFS4_OPEN_STID:
3788 case NFS4_LOCK_STID:
3789 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
3790 if (ret)
3791 goto out;
3792 if (s->sc_type == NFS4_LOCK_STID)
3793 ret = nfsd4_free_lock_stateid(openlockstateid(s));
3794 else
3795 ret = nfserr_locks_held;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003796 break;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003797 case NFS4_REVOKED_DELEG_STID:
3798 dp = delegstateid(s);
3799 destroy_revoked_delegation(dp);
3800 ret = nfs_ok;
3801 break;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003802 default:
3803 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003804 }
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003805out:
3806 nfs4_unlock_state();
3807 return ret;
3808}
3809
NeilBrown4c4cd222005-07-07 17:59:27 -07003810static inline int
3811setlkflg (int type)
3812{
3813 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
3814 RD_STATE : WR_STATE;
3815}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003816
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003817static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003818{
3819 struct svc_fh *current_fh = &cstate->current_fh;
3820 struct nfs4_stateowner *sop = stp->st_stateowner;
3821 __be32 status;
3822
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003823 status = nfsd4_check_seqid(cstate, sop, seqid);
3824 if (status)
3825 return status;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003826 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
3827 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003828 /*
3829 * "Closed" stateid's exist *only* to return
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003830 * nfserr_replay_me from the previous step, and
3831 * revoked delegations are kept only for free_stateid.
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003832 */
3833 return nfserr_bad_stateid;
3834 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
3835 if (status)
3836 return status;
3837 return nfs4_check_fh(current_fh, stp);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003838}
3839
Linus Torvalds1da177e2005-04-16 15:20:36 -07003840/*
3841 * Checks for sequence id mutating operations.
3842 */
Al Virob37ad282006-10-19 23:28:59 -07003843static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03003844nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003845 stateid_t *stateid, char typemask,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003846 struct nfs4_ol_stateid **stpp,
3847 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848{
J. Bruce Fields0836f582008-01-26 19:08:12 -05003849 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003850 struct nfs4_stid *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003851
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003852 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
3853 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07003854
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855 *stpp = NULL;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003856 status = nfsd4_lookup_stateid(stateid, typemask, &s,
3857 cstate->minorversion, nn);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003858 if (status)
3859 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003860 *stpp = openlockstateid(s);
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04003861 if (!nfsd4_has_session(cstate))
3862 cstate->replay_owner = (*stpp)->st_stateowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003863
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003864 return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
3865}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05003866
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003867static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
3868 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003869{
3870 __be32 status;
3871 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003872
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003873 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003874 NFS4_OPEN_STID, stpp, nn);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003875 if (status)
3876 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003877 oo = openowner((*stpp)->st_stateowner);
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003878 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown3a4f98b2005-07-07 17:59:26 -07003879 return nfserr_bad_stateid;
NeilBrown3a4f98b2005-07-07 17:59:26 -07003880 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881}
3882
Al Virob37ad282006-10-19 23:28:59 -07003883__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003884nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003885 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886{
Al Virob37ad282006-10-19 23:28:59 -07003887 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003888 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003889 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003890 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003891
Al Viroa6a9f182013-09-16 10:57:01 -04003892 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3893 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003894
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003895 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07003896 if (status)
3897 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003898
3899 nfs4_lock_state();
3900
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003901 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003902 oc->oc_seqid, &oc->oc_req_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003903 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003904 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003905 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003906 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003907 status = nfserr_bad_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003908 if (oo->oo_flags & NFS4_OO_CONFIRMED)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003909 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003910 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003911 update_stateid(&stp->st_stid.sc_stateid);
3912 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003913 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003914 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07003915
Jeff Layton2a4317c2012-03-21 16:42:43 -04003916 nfsd4_client_record_create(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003917 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003919 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003920 if (!cstate->replay_owner)
3921 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003922 return status;
3923}
3924
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003925static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003926{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003927 if (!test_access(access, stp))
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003928 return;
3929 nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
Jeff Layton82c5ff12012-05-11 09:45:13 -04003930 clear_access(access, stp);
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003931}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003932
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003933static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
3934{
3935 switch (to_access) {
3936 case NFS4_SHARE_ACCESS_READ:
3937 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
3938 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3939 break;
3940 case NFS4_SHARE_ACCESS_WRITE:
3941 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
3942 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3943 break;
3944 case NFS4_SHARE_ACCESS_BOTH:
3945 break;
3946 default:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003947 WARN_ON_ONCE(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003948 }
3949}
3950
3951static void
Jeff Laytonce0fc432012-05-11 09:45:14 -04003952reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953{
3954 int i;
3955 for (i = 0; i < 4; i++) {
3956 if ((i & deny) != i)
Jeff Laytonce0fc432012-05-11 09:45:14 -04003957 clear_deny(i, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003958 }
3959}
3960
Al Virob37ad282006-10-19 23:28:59 -07003961__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003962nfsd4_open_downgrade(struct svc_rqst *rqstp,
3963 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003964 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965{
Al Virob37ad282006-10-19 23:28:59 -07003966 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003967 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003968 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003969
Al Viroa6a9f182013-09-16 10:57:01 -04003970 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
3971 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003972
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04003973 /* We don't yet support WANT bits: */
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02003974 if (od->od_deleg_want)
3975 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
3976 od->od_deleg_want);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003977
3978 nfs4_lock_state();
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003979 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003980 &od->od_stateid, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003981 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003982 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003983 status = nfserr_inval;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003984 if (!test_access(od->od_share_access, stp)) {
3985 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986 stp->st_access_bmap, od->od_share_access);
3987 goto out;
3988 }
Jeff Laytonce0fc432012-05-11 09:45:14 -04003989 if (!test_deny(od->od_share_deny, stp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003990 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3991 stp->st_deny_bmap, od->od_share_deny);
3992 goto out;
3993 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003994 nfs4_stateid_downgrade(stp, od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003995
Jeff Laytonce0fc432012-05-11 09:45:14 -04003996 reset_union_bmap_deny(od->od_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003997
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003998 update_stateid(&stp->st_stid.sc_stateid);
3999 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004000 status = nfs_ok;
4001out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004002 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004003 if (!cstate->replay_owner)
4004 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004005 return status;
4006}
4007
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004008static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4009{
4010 unhash_open_stateid(s);
4011 s->st_stid.sc_type = NFS4_CLOSED_STID;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04004012}
4013
Linus Torvalds1da177e2005-04-16 15:20:36 -07004014/*
4015 * nfs4_unlock_state() called after encode
4016 */
Al Virob37ad282006-10-19 23:28:59 -07004017__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004018nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004019 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004020{
Al Virob37ad282006-10-19 23:28:59 -07004021 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004022 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004023 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004024 struct net *net = SVC_NET(rqstp);
4025 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026
Al Viroa6a9f182013-09-16 10:57:01 -04004027 dprintk("NFSD: nfsd4_close on file %pd\n",
4028 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004029
4030 nfs4_lock_state();
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004031 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
4032 &close->cl_stateid,
4033 NFS4_OPEN_STID|NFS4_CLOSED_STID,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004034 &stp, nn);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004035 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004036 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004038 oo = openowner(stp->st_stateowner);
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004039 update_stateid(&stp->st_stid.sc_stateid);
4040 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004041
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004042 nfsd4_close_open_stateid(stp);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004043
Benny Halevy01a87d92013-10-14 09:01:55 +03004044 if (cstate->minorversion)
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004045 free_generic_stateid(stp);
Benny Halevy01a87d92013-10-14 09:01:55 +03004046 else
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004047 oo->oo_last_closed_stid = stp;
J. Bruce Fields04ef5952006-01-18 17:43:21 -08004048
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004049 if (list_empty(&oo->oo_owner.so_stateids)) {
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04004050 if (cstate->minorversion)
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004051 release_openowner(oo);
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04004052 else {
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004053 /*
4054 * In the 4.0 case we need to keep the owners around a
4055 * little while to handle CLOSE replay.
4056 */
fanchaoting53584f62013-04-11 21:24:13 +08004057 move_to_close_lru(oo, SVC_NET(rqstp));
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004058 }
4059 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004060out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004061 if (!cstate->replay_owner)
4062 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004063 return status;
4064}
4065
Al Virob37ad282006-10-19 23:28:59 -07004066__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004067nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4068 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004070 struct nfs4_delegation *dp;
4071 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004072 struct nfs4_stid *s;
Al Virob37ad282006-10-19 23:28:59 -07004073 __be32 status;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004074 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004076 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004077 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004078
4079 nfs4_lock_state();
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004080 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s,
4081 cstate->minorversion, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004082 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004083 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004084 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004085 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004086 if (status)
4087 goto out;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004088
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004089 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004090out:
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004091 nfs4_unlock_state();
4092
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093 return status;
4094}
4095
4096
Linus Torvalds1da177e2005-04-16 15:20:36 -07004097#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004098
J. Bruce Fields009673b2011-11-07 17:40:10 -05004099#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004100
Benny Halevy87df4de2008-12-15 19:42:03 +02004101static inline u64
4102end_offset(u64 start, u64 len)
4103{
4104 u64 end;
4105
4106 end = start + len;
4107 return end >= start ? end: NFS4_MAX_UINT64;
4108}
4109
4110/* last octet in a range */
4111static inline u64
4112last_byte_offset(u64 start, u64 len)
4113{
4114 u64 end;
4115
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004116 WARN_ON_ONCE(!len);
Benny Halevy87df4de2008-12-15 19:42:03 +02004117 end = start + len;
4118 return end > start ? end - 1: NFS4_MAX_UINT64;
4119}
4120
J. Bruce Fields009673b2011-11-07 17:40:10 -05004121static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004122{
4123 return (file_hashval(inode) + cl_id
4124 + opaque_hashval(ownername->data, ownername->len))
J. Bruce Fields009673b2011-11-07 17:40:10 -05004125 & LOCKOWNER_INO_HASH_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004126}
4127
Linus Torvalds1da177e2005-04-16 15:20:36 -07004128/*
4129 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4130 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4131 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4132 * locking, this prevents us from being completely protocol-compliant. The
4133 * real solution to this problem is to start using unsigned file offsets in
4134 * the VFS, but this is a very deep change!
4135 */
4136static inline void
4137nfs4_transform_lock_offset(struct file_lock *lock)
4138{
4139 if (lock->fl_start < 0)
4140 lock->fl_start = OFFSET_MAX;
4141 if (lock->fl_end < 0)
4142 lock->fl_end = OFFSET_MAX;
4143}
4144
NeilBrownd5b90262006-04-10 22:55:22 -07004145/* Hack!: For now, we're defining this just so we can use a pointer to it
4146 * as a unique cookie to identify our (NFSv4's) posix locks. */
Alexey Dobriyan7b021962009-09-21 17:01:12 -07004147static const struct lock_manager_operations nfsd_posix_mng_ops = {
NeilBrownd5b90262006-04-10 22:55:22 -07004148};
Linus Torvalds1da177e2005-04-16 15:20:36 -07004149
4150static inline void
4151nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
4152{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004153 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004154
NeilBrownd5b90262006-04-10 22:55:22 -07004155 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004156 lo = (struct nfs4_lockowner *) fl->fl_owner;
4157 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
4158 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04004159 if (!deny->ld_owner.data)
4160 /* We just don't care that much */
4161 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004162 deny->ld_owner.len = lo->lo_owner.so_owner.len;
4163 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07004164 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04004165nevermind:
4166 deny->ld_owner.len = 0;
4167 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07004168 deny->ld_clientid.cl_boot = 0;
4169 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004170 }
4171 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02004172 deny->ld_length = NFS4_MAX_UINT64;
4173 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004174 deny->ld_length = fl->fl_end - fl->fl_start + 1;
4175 deny->ld_type = NFS4_READ_LT;
4176 if (fl->fl_type != F_RDLCK)
4177 deny->ld_type = NFS4_WRITE_LT;
4178}
4179
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004180static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner)
4181{
4182 struct nfs4_ol_stateid *lst;
4183
4184 if (!same_owner_str(&lo->lo_owner, owner, clid))
4185 return false;
J. Bruce Fields27b11422014-05-08 11:19:41 -04004186 if (list_empty(&lo->lo_owner.so_stateids)) {
4187 WARN_ON_ONCE(1);
4188 return false;
4189 }
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004190 lst = list_first_entry(&lo->lo_owner.so_stateids,
4191 struct nfs4_ol_stateid, st_perstateowner);
4192 return lst->st_file->fi_inode == inode;
4193}
4194
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004195static struct nfs4_lockowner *
4196find_lockowner_str(struct inode *inode, clientid_t *clid,
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004197 struct xdr_netobj *owner, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004198{
J. Bruce Fields009673b2011-11-07 17:40:10 -05004199 unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner);
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004200 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004201
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004202 list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004203 if (same_lockowner_ino(lo, inode, clid, owner))
4204 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205 }
4206 return NULL;
4207}
4208
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004209static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04004210{
J. Bruce Fields009673b2011-11-07 17:40:10 -05004211 struct inode *inode = open_stp->st_file->fi_inode;
4212 unsigned int inohash = lockowner_ino_hashval(inode,
4213 clp->cl_clientid.cl_id, &lo->lo_owner.so_owner);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004214 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
J. Bruce Fields009673b2011-11-07 17:40:10 -05004215
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004216 list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004217 list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004218 list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04004219}
4220
Linus Torvalds1da177e2005-04-16 15:20:36 -07004221/*
4222 * Alloc a lock owner structure.
4223 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03004224 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004225 *
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004226 * strhashval = ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07004227 */
4228
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004229static struct nfs4_lockowner *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004230alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004231 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004232
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004233 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
4234 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004235 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004236 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
4237 lo->lo_owner.so_is_open_owner = 0;
Neil Brownb59e3c02005-09-13 01:25:38 -07004238 /* It is the openowner seqid that will be incremented in encode in the
4239 * case of new lockowners; so increment the lock seqid manually: */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004240 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
4241 hash_lockowner(lo, strhashval, clp, open_stp);
4242 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243}
4244
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004245static struct nfs4_ol_stateid *
4246alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004247{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004248 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04004249 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004250
J. Bruce Fields996e0932011-10-17 11:14:48 -04004251 stp = nfs4_alloc_stateid(clp);
NeilBrown5ac049a2005-06-23 22:03:03 -07004252 if (stp == NULL)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -04004253 return NULL;
J. Bruce Fields3abdb602013-02-03 12:23:01 -05004254 stp->st_stid.sc_type = NFS4_LOCK_STID;
NeilBrown8beefa22005-06-23 22:03:08 -07004255 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004256 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
4257 stp->st_stateowner = &lo->lo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07004258 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004259 stp->st_file = fp;
J. Bruce Fields0997b172011-03-02 18:01:35 -05004260 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004261 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07004262 stp->st_openstp = open_stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263 return stp;
4264}
4265
NeilBrownfd39ca92005-06-23 22:04:03 -07004266static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07004267check_lock_length(u64 offset, u64 length)
4268{
Benny Halevy87df4de2008-12-15 19:42:03 +02004269 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270 LOFF_OVERFLOW(offset, length)));
4271}
4272
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004273static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05004274{
4275 struct nfs4_file *fp = lock_stp->st_file;
4276 int oflag = nfs4_access_to_omode(access);
4277
Jeff Layton82c5ff12012-05-11 09:45:13 -04004278 if (test_access(access, lock_stp))
J. Bruce Fields0997b172011-03-02 18:01:35 -05004279 return;
4280 nfs4_file_get_access(fp, oflag);
Jeff Layton82c5ff12012-05-11 09:45:13 -04004281 set_access(access, lock_stp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05004282}
4283
J. Bruce Fields2355c592012-04-25 16:56:22 -04004284static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new)
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004285{
4286 struct nfs4_file *fi = ost->st_file;
4287 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4288 struct nfs4_client *cl = oo->oo_owner.so_client;
4289 struct nfs4_lockowner *lo;
4290 unsigned int strhashval;
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004291 struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004292
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004293 lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid,
4294 &lock->v.new.owner, nn);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004295 if (lo) {
4296 if (!cstate->minorversion)
4297 return nfserr_bad_seqid;
4298 /* XXX: a lockowner always has exactly one stateid: */
4299 *lst = list_first_entry(&lo->lo_owner.so_stateids,
4300 struct nfs4_ol_stateid, st_perstateowner);
4301 return nfs_ok;
4302 }
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004303 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004304 &lock->v.new.owner);
4305 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4306 if (lo == NULL)
4307 return nfserr_jukebox;
4308 *lst = alloc_init_lock_stateid(lo, fi, ost);
4309 if (*lst == NULL) {
4310 release_lockowner(lo);
4311 return nfserr_jukebox;
4312 }
4313 *new = true;
4314 return nfs_ok;
4315}
4316
Linus Torvalds1da177e2005-04-16 15:20:36 -07004317/*
4318 * LOCK operation
4319 */
Al Virob37ad282006-10-19 23:28:59 -07004320__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004321nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004322 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004323{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004324 struct nfs4_openowner *open_sop = NULL;
4325 struct nfs4_lockowner *lock_sop = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004326 struct nfs4_ol_stateid *lock_stp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04004327 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004328 struct file_lock *file_lock = NULL;
4329 struct file_lock *conflock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004330 __be32 status = 0;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004331 bool new_state = false;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004332 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07004333 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004334 struct net *net = SVC_NET(rqstp);
4335 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004336
4337 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4338 (long long) lock->lk_offset,
4339 (long long) lock->lk_length);
4340
Linus Torvalds1da177e2005-04-16 15:20:36 -07004341 if (check_lock_length(lock->lk_offset, lock->lk_length))
4342 return nfserr_inval;
4343
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004344 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02004345 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08004346 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4347 return status;
4348 }
4349
Linus Torvalds1da177e2005-04-16 15:20:36 -07004350 nfs4_lock_state();
4351
4352 if (lock->lk_is_new) {
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004353 struct nfs4_ol_stateid *open_stp = NULL;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004354
4355 if (nfsd4_has_session(cstate))
4356 /* See rfc 5661 18.10.3: given clientid is ignored: */
4357 memcpy(&lock->v.new.clientid,
4358 &cstate->session->se_client->cl_clientid,
4359 sizeof(clientid_t));
4360
Linus Torvalds1da177e2005-04-16 15:20:36 -07004361 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004362 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004363 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364
Linus Torvalds1da177e2005-04-16 15:20:36 -07004365 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004366 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004367 lock->lk_new_open_seqid,
4368 &lock->lk_new_open_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004369 &open_stp, nn);
NeilBrown37515172005-07-07 17:59:16 -07004370 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004371 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004372 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004373 status = nfserr_bad_stateid;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004374 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004375 &lock->v.new.clientid))
4376 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004377 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4378 &lock_stp, &new_state);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004379 } else
Benny Halevydd453df2009-04-03 08:28:41 +03004380 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004381 lock->lk_old_lock_seqid,
4382 &lock->lk_old_lock_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004383 NFS4_LOCK_STID, &lock_stp, nn);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004384 if (status)
4385 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004386 lock_sop = lockowner(lock_stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004388 lkflg = setlkflg(lock->lk_type);
4389 status = nfs4_check_openmode(lock_stp, lkflg);
4390 if (status)
4391 goto out;
4392
NeilBrown0dd395d2005-07-07 17:59:15 -07004393 status = nfserr_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004394 if (locks_in_grace(net) && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07004395 goto out;
4396 status = nfserr_no_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004397 if (!locks_in_grace(net) && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07004398 goto out;
4399
Jeff Layton21179d82012-08-21 08:03:32 -04004400 file_lock = locks_alloc_lock();
4401 if (!file_lock) {
4402 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4403 status = nfserr_jukebox;
4404 goto out;
4405 }
4406
4407 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408 switch (lock->lk_type) {
4409 case NFS4_READ_LT:
4410 case NFS4_READW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004411 filp = find_readable_file(lock_stp->st_file);
4412 if (filp)
4413 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Jeff Layton21179d82012-08-21 08:03:32 -04004414 file_lock->fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004415 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416 case NFS4_WRITE_LT:
4417 case NFS4_WRITEW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004418 filp = find_writeable_file(lock_stp->st_file);
4419 if (filp)
4420 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Jeff Layton21179d82012-08-21 08:03:32 -04004421 file_lock->fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004422 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423 default:
4424 status = nfserr_inval;
4425 goto out;
4426 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004427 if (!filp) {
4428 status = nfserr_openmode;
4429 goto out;
4430 }
Jeff Layton21179d82012-08-21 08:03:32 -04004431 file_lock->fl_owner = (fl_owner_t)lock_sop;
4432 file_lock->fl_pid = current->tgid;
4433 file_lock->fl_file = filp;
4434 file_lock->fl_flags = FL_POSIX;
4435 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4436 file_lock->fl_start = lock->lk_offset;
4437 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4438 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004439
Jeff Layton21179d82012-08-21 08:03:32 -04004440 conflock = locks_alloc_lock();
4441 if (!conflock) {
4442 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4443 status = nfserr_jukebox;
4444 goto out;
4445 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004446
Jeff Layton21179d82012-08-21 08:03:32 -04004447 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07004448 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004449 case 0: /* success! */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004450 update_stateid(&lock_stp->st_stid.sc_stateid);
4451 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004452 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07004453 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004454 break;
4455 case (EAGAIN): /* conflock holds conflicting lock */
4456 status = nfserr_denied;
4457 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
Jeff Layton21179d82012-08-21 08:03:32 -04004458 nfs4_set_lock_denied(conflock, &lock->lk_denied);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004459 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004460 case (EDEADLK):
4461 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004462 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04004463 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05004464 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04004465 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004466 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004467 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004468out:
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004469 if (status && new_state)
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05004470 release_lockowner(lock_sop);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004471 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004472 if (!cstate->replay_owner)
4473 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004474 if (file_lock)
4475 locks_free_lock(file_lock);
4476 if (conflock)
4477 locks_free_lock(conflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004478 return status;
4479}
4480
4481/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004482 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4483 * so we do a temporary open here just to get an open file to pass to
4484 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4485 * inode operation.)
4486 */
Al Viro04da6e92012-04-13 00:00:04 -04004487static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004488{
4489 struct file *file;
Al Viro04da6e92012-04-13 00:00:04 -04004490 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4491 if (!err) {
4492 err = nfserrno(vfs_test_lock(file, lock));
4493 nfsd_close(file);
4494 }
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004495 return err;
4496}
4497
4498/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004499 * LOCKT operation
4500 */
Al Virob37ad282006-10-19 23:28:59 -07004501__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004502nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4503 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004504{
4505 struct inode *inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004506 struct file_lock *file_lock = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004507 struct nfs4_lockowner *lo;
Al Virob37ad282006-10-19 23:28:59 -07004508 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004509 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004510
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004511 if (locks_in_grace(SVC_NET(rqstp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004512 return nfserr_grace;
4513
4514 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4515 return nfserr_inval;
4516
Linus Torvalds1da177e2005-04-16 15:20:36 -07004517 nfs4_lock_state();
4518
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004519 if (!nfsd4_has_session(cstate)) {
4520 status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL);
4521 if (status)
4522 goto out;
4523 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004524
J. Bruce Fields75c096f2011-08-15 18:39:32 -04004525 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004526 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004527
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004528 inode = cstate->current_fh.fh_dentry->d_inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004529 file_lock = locks_alloc_lock();
4530 if (!file_lock) {
4531 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4532 status = nfserr_jukebox;
4533 goto out;
4534 }
4535 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536 switch (lockt->lt_type) {
4537 case NFS4_READ_LT:
4538 case NFS4_READW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004539 file_lock->fl_type = F_RDLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540 break;
4541 case NFS4_WRITE_LT:
4542 case NFS4_WRITEW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004543 file_lock->fl_type = F_WRLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004544 break;
4545 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04004546 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004547 status = nfserr_inval;
4548 goto out;
4549 }
4550
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004551 lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004552 if (lo)
Jeff Layton21179d82012-08-21 08:03:32 -04004553 file_lock->fl_owner = (fl_owner_t)lo;
4554 file_lock->fl_pid = current->tgid;
4555 file_lock->fl_flags = FL_POSIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004556
Jeff Layton21179d82012-08-21 08:03:32 -04004557 file_lock->fl_start = lockt->lt_offset;
4558 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559
Jeff Layton21179d82012-08-21 08:03:32 -04004560 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004561
Jeff Layton21179d82012-08-21 08:03:32 -04004562 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
Al Viro04da6e92012-04-13 00:00:04 -04004563 if (status)
Marc Eshelfd85b812006-11-28 16:26:41 -05004564 goto out;
Al Viro04da6e92012-04-13 00:00:04 -04004565
Jeff Layton21179d82012-08-21 08:03:32 -04004566 if (file_lock->fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567 status = nfserr_denied;
Jeff Layton21179d82012-08-21 08:03:32 -04004568 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004569 }
4570out:
4571 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004572 if (file_lock)
4573 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004574 return status;
4575}
4576
Al Virob37ad282006-10-19 23:28:59 -07004577__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004578nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004579 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004580{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004581 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004582 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004583 struct file_lock *file_lock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004584 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07004585 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004586 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4587
Linus Torvalds1da177e2005-04-16 15:20:36 -07004588 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4589 (long long) locku->lu_offset,
4590 (long long) locku->lu_length);
4591
4592 if (check_lock_length(locku->lu_offset, locku->lu_length))
4593 return nfserr_inval;
4594
4595 nfs4_lock_state();
4596
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004597 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004598 &locku->lu_stateid, NFS4_LOCK_STID,
4599 &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004600 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004602 filp = find_any_file(stp->st_file);
4603 if (!filp) {
4604 status = nfserr_lock_range;
4605 goto out;
4606 }
Jeff Layton21179d82012-08-21 08:03:32 -04004607 file_lock = locks_alloc_lock();
4608 if (!file_lock) {
4609 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4610 status = nfserr_jukebox;
4611 goto out;
4612 }
4613 locks_init_lock(file_lock);
4614 file_lock->fl_type = F_UNLCK;
J. Bruce Fields0a262ff2013-06-17 17:29:40 -04004615 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
Jeff Layton21179d82012-08-21 08:03:32 -04004616 file_lock->fl_pid = current->tgid;
4617 file_lock->fl_file = filp;
4618 file_lock->fl_flags = FL_POSIX;
4619 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4620 file_lock->fl_start = locku->lu_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004621
Jeff Layton21179d82012-08-21 08:03:32 -04004622 file_lock->fl_end = last_byte_offset(locku->lu_offset,
4623 locku->lu_length);
4624 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625
Jeff Layton21179d82012-08-21 08:03:32 -04004626 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07004627 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05004628 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629 goto out_nfserr;
4630 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004631 update_stateid(&stp->st_stid.sc_stateid);
4632 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004633
4634out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004635 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields71c3bcd2011-09-27 21:42:29 -04004636 if (!cstate->replay_owner)
4637 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004638 if (file_lock)
4639 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004640 return status;
4641
4642out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07004643 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004644 goto out;
4645}
4646
4647/*
4648 * returns
4649 * 1: locks held by lockowner
4650 * 0: no locks held by lockowner
4651 */
4652static int
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004653check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004654{
4655 struct file_lock **flpp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004656 struct inode *inode = filp->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004657 int status = 0;
4658
Jeff Layton1c8c6012013-06-21 08:58:15 -04004659 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004660 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004661 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004662 status = 1;
4663 goto out;
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004664 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004665 }
4666out:
Jeff Layton1c8c6012013-06-21 08:58:15 -04004667 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004668 return status;
4669}
4670
Al Virob37ad282006-10-19 23:28:59 -07004671__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004672nfsd4_release_lockowner(struct svc_rqst *rqstp,
4673 struct nfsd4_compound_state *cstate,
4674 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004675{
4676 clientid_t *clid = &rlockowner->rl_clientid;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004677 struct nfs4_stateowner *sop;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004678 struct nfs4_lockowner *lo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004679 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004680 struct xdr_netobj *owner = &rlockowner->rl_owner;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004681 struct list_head matches;
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004682 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
Al Virob37ad282006-10-19 23:28:59 -07004683 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004684 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004685
4686 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4687 clid->cl_boot, clid->cl_id);
4688
Linus Torvalds1da177e2005-04-16 15:20:36 -07004689 nfs4_lock_state();
4690
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004691 status = lookup_clientid(clid, cstate->minorversion, nn, NULL);
4692 if (status)
4693 goto out;
4694
NeilBrown3e9e3db2005-06-23 22:04:20 -07004695 status = nfserr_locks_held;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004696 INIT_LIST_HEAD(&matches);
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004697
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004698 list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004699 if (sop->so_is_open_owner)
4700 continue;
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004701 if (!same_owner_str(sop, owner, clid))
4702 continue;
4703 list_for_each_entry(stp, &sop->so_stateids,
4704 st_perstateowner) {
4705 lo = lockowner(sop);
4706 if (check_for_locks(stp->st_file, lo))
4707 goto out;
4708 list_add(&lo->lo_list, &matches);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004709 }
NeilBrown3e9e3db2005-06-23 22:04:20 -07004710 }
4711 /* Clients probably won't expect us to return with some (but not all)
4712 * of the lockowner state released; so don't release any until all
4713 * have been checked. */
4714 status = nfs_ok;
NeilBrown0fa822e2005-07-07 17:59:14 -07004715 while (!list_empty(&matches)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004716 lo = list_entry(matches.next, struct nfs4_lockowner,
4717 lo_list);
NeilBrown0fa822e2005-07-07 17:59:14 -07004718 /* unhash_stateowner deletes so_perclient only
4719 * for openowners. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004720 list_del(&lo->lo_list);
4721 release_lockowner(lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004722 }
4723out:
4724 nfs4_unlock_state();
4725 return status;
4726}
4727
4728static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07004729alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004730{
NeilBrowna55370a2005-06-23 22:03:52 -07004731 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004732}
4733
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004734bool
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004735nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
NeilBrownc7b9a452005-06-23 22:04:30 -07004736{
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004737 struct nfs4_client_reclaim *crp;
NeilBrownc7b9a452005-06-23 22:04:30 -07004738
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004739 crp = nfsd4_find_reclaim_client(name, nn);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004740 return (crp && crp->cr_clp);
NeilBrownc7b9a452005-06-23 22:04:30 -07004741}
4742
Linus Torvalds1da177e2005-04-16 15:20:36 -07004743/*
4744 * failure => all reset bets are off, nfserr_no_grace...
4745 */
Jeff Layton772a9bb2012-11-12 15:00:54 -05004746struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004747nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004748{
4749 unsigned int strhashval;
Jeff Layton772a9bb2012-11-12 15:00:54 -05004750 struct nfs4_client_reclaim *crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004751
NeilBrowna55370a2005-06-23 22:03:52 -07004752 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4753 crp = alloc_reclaim();
Jeff Layton772a9bb2012-11-12 15:00:54 -05004754 if (crp) {
4755 strhashval = clientstr_hashval(name);
4756 INIT_LIST_HEAD(&crp->cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004757 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
Jeff Layton772a9bb2012-11-12 15:00:54 -05004758 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004759 crp->cr_clp = NULL;
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004760 nn->reclaim_str_hashtbl_size++;
Jeff Layton772a9bb2012-11-12 15:00:54 -05004761 }
4762 return crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004763}
4764
Jeff Layton2a4317c2012-03-21 16:42:43 -04004765void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004766nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
Jeff Laytonce30e532012-11-12 15:00:53 -05004767{
4768 list_del(&crp->cr_strhash);
4769 kfree(crp);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004770 nn->reclaim_str_hashtbl_size--;
Jeff Laytonce30e532012-11-12 15:00:53 -05004771}
4772
4773void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004774nfs4_release_reclaim(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004775{
4776 struct nfs4_client_reclaim *crp = NULL;
4777 int i;
4778
Linus Torvalds1da177e2005-04-16 15:20:36 -07004779 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004780 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
4781 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782 struct nfs4_client_reclaim, cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004783 nfs4_remove_reclaim_record(crp, nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004784 }
4785 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004786 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004787}
4788
4789/*
4790 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
Jeff Layton2a4317c2012-03-21 16:42:43 -04004791struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004792nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004793{
4794 unsigned int strhashval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004795 struct nfs4_client_reclaim *crp = NULL;
4796
Jeff Layton278c9312012-11-12 15:00:52 -05004797 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798
Jeff Layton278c9312012-11-12 15:00:52 -05004799 strhashval = clientstr_hashval(recdir);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004800 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
Jeff Layton278c9312012-11-12 15:00:52 -05004801 if (same_name(crp->cr_recdir, recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004802 return crp;
4803 }
4804 }
4805 return NULL;
4806}
4807
4808/*
4809* Called from OPEN. Look for clientid in reclaim list.
4810*/
Al Virob37ad282006-10-19 23:28:59 -07004811__be32
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004812nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004813{
Jeff Laytona52d7262012-03-21 09:52:02 -04004814 struct nfs4_client *clp;
4815
4816 /* find clientid in conf_id_hashtbl */
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03004817 clp = find_confirmed_client(clid, sessions, nn);
Jeff Laytona52d7262012-03-21 09:52:02 -04004818 if (clp == NULL)
4819 return nfserr_reclaim_bad;
4820
4821 return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004822}
4823
Bryan Schumaker65178db2011-11-01 13:35:21 -04004824#ifdef CONFIG_NFSD_FAULT_INJECTION
4825
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004826u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
4827{
J. Bruce Fields221a6872013-04-01 22:23:49 -04004828 if (mark_client_expired(clp))
4829 return 0;
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004830 expire_client(clp);
4831 return 1;
4832}
4833
Bryan Schumaker184c1842012-11-29 11:40:44 -05004834u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
4835{
4836 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05004837 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05004838 printk(KERN_INFO "NFS Client: %s\n", buf);
4839 return 1;
4840}
4841
4842static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
4843 const char *type)
4844{
4845 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05004846 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05004847 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
4848}
4849
Bryan Schumakerfc291712012-11-29 11:40:40 -05004850static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *))
4851{
4852 struct nfs4_openowner *oop;
4853 struct nfs4_lockowner *lop, *lo_next;
4854 struct nfs4_ol_stateid *stp, *st_next;
4855 u64 count = 0;
4856
4857 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
4858 list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) {
4859 list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) {
4860 if (func)
4861 func(lop);
4862 if (++count == max)
4863 return count;
4864 }
4865 }
4866 }
4867
4868 return count;
4869}
4870
4871u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
4872{
4873 return nfsd_foreach_client_lock(clp, max, release_lockowner);
4874}
4875
Bryan Schumaker184c1842012-11-29 11:40:44 -05004876u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
4877{
4878 u64 count = nfsd_foreach_client_lock(clp, max, NULL);
4879 nfsd_print_count(clp, count, "locked files");
4880 return count;
4881}
4882
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05004883static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
4884{
4885 struct nfs4_openowner *oop, *next;
4886 u64 count = 0;
4887
4888 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
4889 if (func)
4890 func(oop);
4891 if (++count == max)
4892 break;
4893 }
4894
4895 return count;
4896}
4897
4898u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
4899{
4900 return nfsd_foreach_client_open(clp, max, release_openowner);
4901}
4902
Bryan Schumaker184c1842012-11-29 11:40:44 -05004903u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
4904{
4905 u64 count = nfsd_foreach_client_open(clp, max, NULL);
4906 nfsd_print_count(clp, count, "open files");
4907 return count;
4908}
4909
Bryan Schumaker269de302012-11-29 11:40:42 -05004910static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
4911 struct list_head *victims)
4912{
4913 struct nfs4_delegation *dp, *next;
4914 u64 count = 0;
4915
Benny Halevycdc97502014-05-30 09:09:30 -04004916 lockdep_assert_held(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05004917 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
4918 if (victims)
4919 list_move(&dp->dl_recall_lru, victims);
4920 if (++count == max)
4921 break;
4922 }
4923 return count;
4924}
4925
4926u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
4927{
4928 struct nfs4_delegation *dp, *next;
4929 LIST_HEAD(victims);
4930 u64 count;
4931
Benny Halevycdc97502014-05-30 09:09:30 -04004932 spin_lock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05004933 count = nfsd_find_all_delegations(clp, max, &victims);
Benny Halevycdc97502014-05-30 09:09:30 -04004934 spin_unlock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05004935
4936 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004937 revoke_delegation(dp);
Bryan Schumaker269de302012-11-29 11:40:42 -05004938
4939 return count;
4940}
4941
4942u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
4943{
4944 struct nfs4_delegation *dp, *next;
4945 LIST_HEAD(victims);
4946 u64 count;
4947
Benny Halevycdc97502014-05-30 09:09:30 -04004948 spin_lock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05004949 count = nfsd_find_all_delegations(clp, max, &victims);
4950 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
4951 nfsd_break_one_deleg(dp);
Benny Halevycdc97502014-05-30 09:09:30 -04004952 spin_unlock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05004953
4954 return count;
4955}
4956
Bryan Schumaker184c1842012-11-29 11:40:44 -05004957u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
4958{
4959 u64 count = 0;
4960
Benny Halevycdc97502014-05-30 09:09:30 -04004961 spin_lock(&state_lock);
Bryan Schumaker184c1842012-11-29 11:40:44 -05004962 count = nfsd_find_all_delegations(clp, max, NULL);
Benny Halevycdc97502014-05-30 09:09:30 -04004963 spin_unlock(&state_lock);
Bryan Schumaker184c1842012-11-29 11:40:44 -05004964
4965 nfsd_print_count(clp, count, "delegations");
4966 return count;
4967}
4968
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004969u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
Bryan Schumaker65178db2011-11-01 13:35:21 -04004970{
4971 struct nfs4_client *clp, *next;
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004972 u64 count = 0;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004973 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004974
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004975 if (!nfsd_netns_ready(nn))
4976 return 0;
4977
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03004978 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004979 count += func(clp, max - count);
4980 if ((max != 0) && (count >= max))
Bryan Schumaker65178db2011-11-01 13:35:21 -04004981 break;
4982 }
Bryan Schumaker65178db2011-11-01 13:35:21 -04004983
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004984 return count;
4985}
4986
Bryan Schumaker6c1e82a2012-11-29 11:40:46 -05004987struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
4988{
4989 struct nfs4_client *clp;
4990 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
4991
4992 if (!nfsd_netns_ready(nn))
4993 return NULL;
4994
4995 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
4996 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
4997 return clp;
4998 }
4999 return NULL;
5000}
5001
Bryan Schumaker65178db2011-11-01 13:35:21 -04005002#endif /* CONFIG_NFSD_FAULT_INJECTION */
5003
Meelap Shahc2f1a552007-07-17 04:04:39 -07005004/*
5005 * Since the lifetime of a delegation isn't limited to that of an open, a
5006 * client may quite reasonably hang on to a delegation as long as it has
5007 * the inode cached. This becomes an obvious problem the first time a
5008 * client's inode cache approaches the size of the server's total memory.
5009 *
5010 * For now we avoid this problem by imposing a hard limit on the number
5011 * of delegations, which varies according to the server's memory size.
5012 */
5013static void
5014set_max_delegations(void)
5015{
5016 /*
5017 * Allow at most 4 delegations per megabyte of RAM. Quick
5018 * estimates suggest that in the worst case (where every delegation
5019 * is for a different inode), a delegation could take about 1.5K,
5020 * giving a worst case usage of about 6% of memory.
5021 */
5022 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
5023}
5024
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005025static int nfs4_state_create_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005026{
5027 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5028 int i;
5029
5030 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5031 CLIENT_HASH_SIZE, GFP_KERNEL);
5032 if (!nn->conf_id_hashtbl)
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005033 goto err;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005034 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5035 CLIENT_HASH_SIZE, GFP_KERNEL);
5036 if (!nn->unconf_id_hashtbl)
5037 goto err_unconf_id;
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005038 nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
5039 OWNER_HASH_SIZE, GFP_KERNEL);
5040 if (!nn->ownerstr_hashtbl)
5041 goto err_ownerstr;
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005042 nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) *
5043 LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL);
5044 if (!nn->lockowner_ino_hashtbl)
5045 goto err_lockowner_ino;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005046 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
5047 SESSION_HASH_SIZE, GFP_KERNEL);
5048 if (!nn->sessionid_hashtbl)
5049 goto err_sessionid;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005050
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005051 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005052 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005053 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005054 }
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005055 for (i = 0; i < OWNER_HASH_SIZE; i++)
5056 INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005057 for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
5058 INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005059 for (i = 0; i < SESSION_HASH_SIZE; i++)
5060 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005061 nn->conf_name_tree = RB_ROOT;
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005062 nn->unconf_name_tree = RB_ROOT;
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03005063 INIT_LIST_HEAD(&nn->client_lru);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03005064 INIT_LIST_HEAD(&nn->close_lru);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04005065 INIT_LIST_HEAD(&nn->del_recall_lru);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03005066 spin_lock_init(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005067
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005068 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005069 get_net(net);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005070
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005071 return 0;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005072
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005073err_sessionid:
5074 kfree(nn->lockowner_ino_hashtbl);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005075err_lockowner_ino:
5076 kfree(nn->ownerstr_hashtbl);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005077err_ownerstr:
5078 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005079err_unconf_id:
5080 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005081err:
5082 return -ENOMEM;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005083}
5084
5085static void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005086nfs4_state_destroy_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005087{
5088 int i;
5089 struct nfs4_client *clp = NULL;
5090 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5091
5092 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5093 while (!list_empty(&nn->conf_id_hashtbl[i])) {
5094 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5095 destroy_client(clp);
5096 }
5097 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005098
Kinglong Mee2b905632014-03-26 22:09:30 +08005099 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5100 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
5101 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5102 destroy_client(clp);
5103 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005104 }
5105
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005106 kfree(nn->sessionid_hashtbl);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005107 kfree(nn->lockowner_ino_hashtbl);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005108 kfree(nn->ownerstr_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005109 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005110 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005111 put_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005112}
5113
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03005114int
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005115nfs4_state_start_net(struct net *net)
NeilBrownac4d8ff22005-06-23 22:03:30 -07005116{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04005117 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005118 int ret;
5119
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005120 ret = nfs4_state_create_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005121 if (ret)
5122 return ret;
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04005123 nfsd4_client_tracking_init(net);
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04005124 nn->boot_time = get_seconds();
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04005125 locks_start_grace(net, &nn->nfsd4_manager);
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04005126 nn->grace_ended = false;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005127 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03005128 nn->nfsd4_grace, net);
5129 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005130 return 0;
5131}
5132
5133/* initialization to perform when the nfsd service is started: */
5134
5135int
5136nfs4_state_start(void)
5137{
5138 int ret;
5139
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005140 ret = set_callback_cred();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005141 if (ret)
5142 return -ENOMEM;
NeilBrown58da2822005-06-23 22:03:19 -07005143 laundry_wq = create_singlethread_workqueue("nfsd4");
Jeff Laytona6d6b782012-03-05 11:42:36 -05005144 if (laundry_wq == NULL) {
5145 ret = -ENOMEM;
5146 goto out_recovery;
5147 }
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005148 ret = nfsd4_create_callback_queue();
5149 if (ret)
5150 goto out_free_laundry;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005151
Meelap Shahc2f1a552007-07-17 04:04:39 -07005152 set_max_delegations();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005153
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005154 return 0;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005155
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005156out_free_laundry:
5157 destroy_workqueue(laundry_wq);
Jeff Laytona6d6b782012-03-05 11:42:36 -05005158out_recovery:
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005159 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005160}
5161
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03005162void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005163nfs4_state_shutdown_net(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005164{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005165 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005166 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005167 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005168
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005169 cancel_delayed_work_sync(&nn->laundromat_work);
5170 locks_end_grace(&nn->nfsd4_manager);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05005171
J. Bruce Fieldse50a26d2013-10-30 10:33:09 -04005172 nfs4_lock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005173 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04005174 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04005175 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005176 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5177 list_move(&dp->dl_recall_lru, &reaplist);
5178 }
Benny Halevycdc97502014-05-30 09:09:30 -04005179 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005180 list_for_each_safe(pos, next, &reaplist) {
5181 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04005182 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005183 }
5184
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005185 nfsd4_client_tracking_exit(net);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005186 nfs4_state_destroy_net(net);
J. Bruce Fieldse50a26d2013-10-30 10:33:09 -04005187 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005188}
5189
5190void
5191nfs4_state_shutdown(void)
5192{
NeilBrown5e8d5c22006-04-10 22:55:37 -07005193 destroy_workqueue(laundry_wq);
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04005194 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005195}
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005196
5197static void
5198get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5199{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01005200 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
5201 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005202}
5203
5204static void
5205put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5206{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01005207 if (cstate->minorversion) {
5208 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
5209 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5210 }
5211}
5212
5213void
5214clear_current_stateid(struct nfsd4_compound_state *cstate)
5215{
5216 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005217}
5218
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005219/*
5220 * functions to set current state id
5221 */
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005222void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01005223nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5224{
5225 put_stateid(cstate, &odp->od_stateid);
5226}
5227
5228void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005229nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
5230{
5231 put_stateid(cstate, &open->op_stateid);
5232}
5233
5234void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005235nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5236{
5237 put_stateid(cstate, &close->cl_stateid);
5238}
5239
5240void
5241nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
5242{
5243 put_stateid(cstate, &lock->lk_resp_stateid);
5244}
5245
5246/*
5247 * functions to consume current state id
5248 */
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01005249
5250void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01005251nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5252{
5253 get_stateid(cstate, &odp->od_stateid);
5254}
5255
5256void
5257nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
5258{
5259 get_stateid(cstate, &drp->dr_stateid);
5260}
5261
5262void
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01005263nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
5264{
5265 get_stateid(cstate, &fsp->fr_stateid);
5266}
5267
5268void
5269nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
5270{
5271 get_stateid(cstate, &setattr->sa_stateid);
5272}
5273
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005274void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005275nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5276{
5277 get_stateid(cstate, &close->cl_stateid);
5278}
5279
5280void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005281nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005282{
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005283 get_stateid(cstate, &locku->lu_stateid);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005284}
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01005285
5286void
5287nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
5288{
5289 get_stateid(cstate, &read->rd_stateid);
5290}
5291
5292void
5293nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
5294{
5295 get_stateid(cstate, &write->wr_stateid);
5296}