blob: d0a016a502becb71e549546876220f8f35ba7626 [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 */
84static DEFINE_SPINLOCK(recall_lock);
85
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{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800238 if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) {
Jeff Layton89876f82013-04-02 09:01:59 -0400239 hlist_del(&fi->fi_hash);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800240 spin_unlock(&recall_lock);
241 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 Fields3abdb602013-02-03 12:23:01 -0500378 dp->dl_stid.sc_type = NFS4_DELEG_STID;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400379 /*
380 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400381 * meaning of seqid 0 isn't meaningful, really, but let's avoid
382 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400383 */
384 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownef0f3392006-04-10 22:55:41 -0700385 num_delegations++;
NeilBrownea1da632005-06-23 22:04:17 -0700386 INIT_LIST_HEAD(&dp->dl_perfile);
387 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 INIT_LIST_HEAD(&dp->dl_recall_lru);
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -0400389 dp->dl_file = NULL;
J. Bruce Fields99c41512013-05-21 16:21:25 -0400390 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
J. Bruce Fields6c02eaa2009-02-02 17:30:51 -0500391 fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 dp->dl_time = 0;
393 atomic_set(&dp->dl_count, 1);
J. Bruce Fields57725152012-11-05 15:10:26 -0500394 nfsd4_init_callback(&dp->dl_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return dp;
396}
397
J. Bruce Fields68a33962013-03-21 11:21:50 -0400398static void remove_stid(struct nfs4_stid *s)
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500399{
400 struct idr *stateids = &s->sc_client->cl_stateids;
401
402 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500403}
404
Benny Halevy9857df82013-10-14 13:44:52 +0300405static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
406{
407 kmem_cache_free(slab, s);
408}
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410void
411nfs4_put_delegation(struct nfs4_delegation *dp)
412{
413 if (atomic_dec_and_test(&dp->dl_count)) {
Benny Halevy9857df82013-10-14 13:44:52 +0300414 nfs4_free_stid(deleg_slab, &dp->dl_stid);
NeilBrownef0f3392006-04-10 22:55:41 -0700415 num_delegations--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 }
417}
418
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500419static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420{
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -0500421 if (!fp->fi_lease)
422 return;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500423 if (atomic_dec_and_test(&fp->fi_delegees)) {
424 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
425 fp->fi_lease = NULL;
J. Bruce Fields4ee63622011-04-15 18:08:26 -0400426 fput(fp->fi_deleg_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500427 fp->fi_deleg_file = NULL;
428 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400431static void unhash_stid(struct nfs4_stid *s)
432{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500433 s->sc_type = 0;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400434}
435
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436/* Called under the state lock. */
437static void
438unhash_delegation(struct nfs4_delegation *dp)
439{
NeilBrownea1da632005-06-23 22:04:17 -0700440 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 spin_lock(&recall_lock);
J. Bruce Fields5d926e82011-02-07 16:53:46 -0500442 list_del_init(&dp->dl_perfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 list_del_init(&dp->dl_recall_lru);
444 spin_unlock(&recall_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -0500445 if (dp->dl_file) {
446 nfs4_put_deleg_lease(dp->dl_file);
447 put_nfs4_file(dp->dl_file);
448 dp->dl_file = NULL;
449 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400450}
451
452
453
454static void destroy_revoked_delegation(struct nfs4_delegation *dp)
455{
456 list_del_init(&dp->dl_recall_lru);
J. Bruce Fields68a33962013-03-21 11:21:50 -0400457 remove_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 nfs4_put_delegation(dp);
459}
460
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400461static void destroy_delegation(struct nfs4_delegation *dp)
462{
463 unhash_delegation(dp);
464 remove_stid(&dp->dl_stid);
465 nfs4_put_delegation(dp);
466}
467
468static void revoke_delegation(struct nfs4_delegation *dp)
469{
470 struct nfs4_client *clp = dp->dl_stid.sc_client;
471
472 if (clp->cl_minorversion == 0)
473 destroy_delegation(dp);
474 else {
475 unhash_delegation(dp);
476 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
477 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
478 }
479}
480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481/*
482 * SETCLIENTID state
483 */
484
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400485static unsigned int clientid_hashval(u32 id)
486{
487 return id & CLIENT_HASH_MASK;
488}
489
490static unsigned int clientstr_hashval(const char *name)
491{
492 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
493}
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495/*
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400496 * We store the NONE, READ, WRITE, and BOTH bits separately in the
497 * st_{access,deny}_bmap field of the stateid, in order to track not
498 * only what share bits are currently in force, but also what
499 * combinations of share bits previous opens have used. This allows us
500 * to enforce the recommendation of rfc 3530 14.2.19 that the server
501 * return an error if the client attempt to downgrade to a combination
502 * of share bits not explicable by closing some of its previous opens.
503 *
504 * XXX: This enforcement is actually incomplete, since we don't keep
505 * track of access/deny bit combinations; so, e.g., we allow:
506 *
507 * OPEN allow read, deny write
508 * OPEN allow both, deny none
509 * DOWNGRADE allow read, deny none
510 *
511 * which we should reject.
512 */
Jeff Layton5ae037e2012-05-11 09:45:11 -0400513static unsigned int
514bmap_to_share_mode(unsigned long bmap) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400515 int i;
Jeff Layton5ae037e2012-05-11 09:45:11 -0400516 unsigned int access = 0;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400517
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400518 for (i = 1; i < 4; i++) {
519 if (test_bit(i, &bmap))
Jeff Layton5ae037e2012-05-11 09:45:11 -0400520 access |= i;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400521 }
Jeff Layton5ae037e2012-05-11 09:45:11 -0400522 return access;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400523}
524
Jeff Layton3a328612012-05-11 09:45:12 -0400525static bool
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400526test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400527 unsigned int access, deny;
528
Jeff Layton5ae037e2012-05-11 09:45:11 -0400529 access = bmap_to_share_mode(stp->st_access_bmap);
530 deny = bmap_to_share_mode(stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400531 if ((access & open->op_share_deny) || (deny & open->op_share_access))
Jeff Layton3a328612012-05-11 09:45:12 -0400532 return false;
533 return true;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400534}
535
Jeff Layton82c5ff12012-05-11 09:45:13 -0400536/* set share access for a given stateid */
537static inline void
538set_access(u32 access, struct nfs4_ol_stateid *stp)
539{
540 __set_bit(access, &stp->st_access_bmap);
541}
542
543/* clear share access for a given stateid */
544static inline void
545clear_access(u32 access, struct nfs4_ol_stateid *stp)
546{
547 __clear_bit(access, &stp->st_access_bmap);
548}
549
550/* test whether a given stateid has access */
551static inline bool
552test_access(u32 access, struct nfs4_ol_stateid *stp)
553{
554 return test_bit(access, &stp->st_access_bmap);
555}
556
Jeff Laytonce0fc432012-05-11 09:45:14 -0400557/* set share deny for a given stateid */
558static inline void
559set_deny(u32 access, struct nfs4_ol_stateid *stp)
560{
561 __set_bit(access, &stp->st_deny_bmap);
562}
563
564/* clear share deny for a given stateid */
565static inline void
566clear_deny(u32 access, struct nfs4_ol_stateid *stp)
567{
568 __clear_bit(access, &stp->st_deny_bmap);
569}
570
571/* test whether a given stateid is denying specific access */
572static inline bool
573test_deny(u32 access, struct nfs4_ol_stateid *stp)
574{
575 return test_bit(access, &stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400576}
577
578static int nfs4_access_to_omode(u32 access)
579{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400580 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400581 case NFS4_SHARE_ACCESS_READ:
582 return O_RDONLY;
583 case NFS4_SHARE_ACCESS_WRITE:
584 return O_WRONLY;
585 case NFS4_SHARE_ACCESS_BOTH:
586 return O_RDWR;
587 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -0500588 WARN_ON_ONCE(1);
589 return O_RDONLY;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400590}
591
Jeff Layton82c5ff12012-05-11 09:45:13 -0400592/* release all access and file references for a given stateid */
593static void
594release_all_access(struct nfs4_ol_stateid *stp)
595{
596 int i;
597
598 for (i = 1; i < 4; i++) {
599 if (test_access(i, stp))
600 nfs4_file_put_access(stp->st_file,
601 nfs4_access_to_omode(i));
602 clear_access(i, stp);
603 }
604}
605
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400606static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500607{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500608 list_del(&stp->st_perfile);
609 list_del(&stp->st_perstateowner);
610}
611
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400612static void close_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500613{
Jeff Layton82c5ff12012-05-11 09:45:13 -0400614 release_all_access(stp);
OGAWA Hirofumia96e5b92011-04-18 11:48:55 -0400615 put_nfs4_file(stp->st_file);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400616 stp->st_file = NULL;
617}
618
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400619static void free_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400620{
J. Bruce Fields68a33962013-03-21 11:21:50 -0400621 remove_stid(&stp->st_stid);
Benny Halevy9857df82013-10-14 13:44:52 +0300622 nfs4_free_stid(stateid_slab, &stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500623}
624
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400625static void release_lock_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500626{
627 struct file *file;
628
629 unhash_generic_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400630 unhash_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500631 file = find_any_file(stp->st_file);
632 if (file)
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400633 locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400634 close_generic_stateid(stp);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500635 free_generic_stateid(stp);
636}
637
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400638static void unhash_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500639{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400640 struct nfs4_ol_stateid *stp;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500641
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400642 list_del(&lo->lo_owner.so_strhash);
643 list_del(&lo->lo_perstateid);
J. Bruce Fields009673b2011-11-07 17:40:10 -0500644 list_del(&lo->lo_owner_ino_hash);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400645 while (!list_empty(&lo->lo_owner.so_stateids)) {
646 stp = list_first_entry(&lo->lo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400647 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500648 release_lock_stateid(stp);
649 }
650}
651
Trond Myklebust50cc6232014-04-18 14:44:03 -0400652static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
653{
654 kfree(lo->lo_owner.so_owner.data);
655 kmem_cache_free(lockowner_slab, lo);
656}
657
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400658static void release_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500659{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400660 unhash_lockowner(lo);
661 nfs4_free_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500662}
663
664static void
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400665release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500666{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400667 struct nfs4_lockowner *lo;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500668
669 while (!list_empty(&open_stp->st_lockowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400670 lo = list_entry(open_stp->st_lockowners.next,
671 struct nfs4_lockowner, lo_perstateid);
672 release_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500673 }
674}
675
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400676static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields22839632009-01-11 14:27:17 -0500677{
678 unhash_generic_stateid(stp);
679 release_stateid_lockowners(stp);
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400680 close_generic_stateid(stp);
681}
682
683static void release_open_stateid(struct nfs4_ol_stateid *stp)
684{
685 unhash_open_stateid(stp);
J. Bruce Fields22839632009-01-11 14:27:17 -0500686 free_generic_stateid(stp);
687}
688
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400689static void unhash_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500690{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400691 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500692
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400693 list_del(&oo->oo_owner.so_strhash);
694 list_del(&oo->oo_perclient);
695 while (!list_empty(&oo->oo_owner.so_stateids)) {
696 stp = list_first_entry(&oo->oo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400697 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500698 release_open_stateid(stp);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500699 }
700}
701
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400702static void release_last_closed_stateid(struct nfs4_openowner *oo)
703{
704 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
705
706 if (s) {
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400707 free_generic_stateid(s);
708 oo->oo_last_closed_stid = NULL;
709 }
710}
711
Trond Myklebust50cc6232014-04-18 14:44:03 -0400712static void nfs4_free_openowner(struct nfs4_openowner *oo)
713{
714 kfree(oo->oo_owner.so_owner.data);
715 kmem_cache_free(openowner_slab, oo);
716}
717
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400718static void release_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500719{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400720 unhash_openowner(oo);
721 list_del(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400722 release_last_closed_stateid(oo);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400723 nfs4_free_openowner(oo);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500724}
725
Marc Eshel5282fd72009-04-03 08:27:52 +0300726static inline int
727hash_sessionid(struct nfs4_sessionid *sessionid)
728{
729 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
730
731 return sid->sequence % SESSION_HASH_SIZE;
732}
733
Trond Myklebust8f199b82012-03-20 15:11:17 -0400734#ifdef NFSD_DEBUG
Marc Eshel5282fd72009-04-03 08:27:52 +0300735static inline void
736dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
737{
738 u32 *ptr = (u32 *)(&sessionid->data[0]);
739 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
740}
Trond Myklebust8f199b82012-03-20 15:11:17 -0400741#else
742static inline void
743dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
744{
745}
746#endif
747
J. Bruce Fields9411b1d2013-04-01 16:37:12 -0400748/*
749 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
750 * won't be used for replay.
751 */
752void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
753{
754 struct nfs4_stateowner *so = cstate->replay_owner;
755
756 if (nfserr == nfserr_replay_me)
757 return;
758
759 if (!seqid_mutating_err(ntohl(nfserr))) {
760 cstate->replay_owner = NULL;
761 return;
762 }
763 if (!so)
764 return;
765 if (so->so_is_open_owner)
766 release_last_closed_stateid(openowner(so));
767 so->so_seqid++;
768 return;
769}
Marc Eshel5282fd72009-04-03 08:27:52 +0300770
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300771static void
772gen_sessionid(struct nfsd4_session *ses)
773{
774 struct nfs4_client *clp = ses->se_client;
775 struct nfsd4_sessionid *sid;
776
777 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
778 sid->clientid = clp->cl_clientid;
779 sid->sequence = current_sessionid++;
780 sid->reserved = 0;
781}
782
783/*
Andy Adamsona6496372009-08-28 08:45:01 -0400784 * The protocol defines ca_maxresponssize_cached to include the size of
785 * the rpc header, but all we need to cache is the data starting after
786 * the end of the initial SEQUENCE operation--the rest we regenerate
787 * each time. Therefore we can advertise a ca_maxresponssize_cached
788 * value that is the number of bytes in our cache plus a few additional
789 * bytes. In order to stay on the safe side, and not promise more than
790 * we can cache, those additional bytes must be the minimum possible: 24
791 * bytes of rpc header (xid through accept state, with AUTH_NULL
792 * verifier), 12 for the compound header (with zero-length tag), and 44
793 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300794 */
Andy Adamsona6496372009-08-28 08:45:01 -0400795#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
796
Andy Adamson557ce262009-08-28 08:45:04 -0400797static void
798free_session_slots(struct nfsd4_session *ses)
799{
800 int i;
801
802 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
803 kfree(ses->se_slots[i]);
804}
805
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400806/*
807 * We don't actually need to cache the rpc and session headers, so we
808 * can allocate a little less for each slot:
809 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400810static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400811{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400812 u32 size;
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400813
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400814 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
815 size = 0;
816 else
817 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
818 return size + sizeof(struct nfsd4_slot);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400819}
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300820
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400821/*
822 * XXX: If we run out of reserved DRC memory we could (up to a point)
823 * re-negotiate active sessions and reduce their slot usage to make
Justin P. Mattock42b2aa82011-11-28 20:31:00 -0800824 * room for new connections. For now we just fail the create session.
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400825 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400826static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400827{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400828 u32 slotsize = slot_bytes(ca);
829 u32 num = ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400830 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300831
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400832 spin_lock(&nfsd_drc_lock);
Zhang Yanfei697ce9b2013-02-22 16:35:47 -0800833 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
834 nfsd_drc_max_mem - nfsd_drc_mem_used);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400835 num = min_t(int, num, avail / slotsize);
836 nfsd_drc_mem_used += num * slotsize;
837 spin_unlock(&nfsd_drc_lock);
838
839 return num;
840}
841
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400842static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400843{
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400844 int slotsize = slot_bytes(ca);
845
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400846 spin_lock(&nfsd_drc_lock);
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400847 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400848 spin_unlock(&nfsd_drc_lock);
849}
850
Kinglong Mee60810e52014-01-01 00:35:47 +0800851static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
852 struct nfsd4_channel_attrs *battrs)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400853{
Kinglong Mee60810e52014-01-01 00:35:47 +0800854 int numslots = fattrs->maxreqs;
855 int slotsize = slot_bytes(fattrs);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400856 struct nfsd4_session *new;
857 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300858
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -0400859 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400860 + sizeof(struct nfsd4_session) > PAGE_SIZE);
861 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -0400862
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400863 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300864 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400865 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -0400866 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400867 for (i = 0; i < numslots; i++) {
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400868 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400869 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -0400870 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -0400871 }
Kinglong Mee60810e52014-01-01 00:35:47 +0800872
873 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
874 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
875
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400876 return new;
877out_free:
878 while (i--)
879 kfree(new->se_slots[i]);
880 kfree(new);
881 return NULL;
882}
883
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400884static void free_conn(struct nfsd4_conn *c)
885{
886 svc_xprt_put(c->cn_xprt);
887 kfree(c);
888}
889
890static void nfsd4_conn_lost(struct svc_xpt_user *u)
891{
892 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
893 struct nfs4_client *clp = c->cn_session->se_client;
894
895 spin_lock(&clp->cl_lock);
896 if (!list_empty(&c->cn_persession)) {
897 list_del(&c->cn_persession);
898 free_conn(c);
899 }
J. Bruce Fieldseea49802010-11-18 08:34:12 -0500900 nfsd4_probe_callback(clp);
J. Bruce Fields2e4b7232013-03-08 09:30:43 -0500901 spin_unlock(&clp->cl_lock);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400902}
903
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400904static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400905{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400906 struct nfsd4_conn *conn;
907
908 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
909 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400910 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400911 svc_xprt_get(rqstp->rq_xprt);
912 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400913 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400914 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
915 return conn;
916}
917
J. Bruce Fields328ead22010-09-29 16:11:06 -0400918static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
919{
920 conn->cn_session = ses;
921 list_add(&conn->cn_persession, &ses->se_conns);
922}
923
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400924static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
925{
926 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400927
928 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -0400929 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400930 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400931}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400932
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400933static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400934{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400935 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400936 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400937}
938
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400939static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400940{
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400941 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400942
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400943 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400944 ret = nfsd4_register_conn(conn);
945 if (ret)
946 /* oops; xprt is already down: */
947 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fields6a3b1562012-09-12 09:59:17 -0400948 if (conn->cn_flags & NFS4_CDFC4_BACK) {
Weston Andros Adamson24119672012-05-24 15:42:17 -0400949 /* callback channel may be back up */
950 nfsd4_probe_callback(ses->se_client);
951 }
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400952}
953
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400954static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400955{
956 u32 dir = NFS4_CDFC4_FORE;
957
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400958 if (cses->flags & SESSION4_BACK_CHAN)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400959 dir |= NFS4_CDFC4_BACK;
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -0400960 return alloc_conn(rqstp, dir);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400961}
962
963/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400964static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400965{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400966 struct nfs4_client *clp = s->se_client;
967 struct nfsd4_conn *c;
968
969 spin_lock(&clp->cl_lock);
970 while (!list_empty(&s->se_conns)) {
971 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
972 list_del_init(&c->cn_persession);
973 spin_unlock(&clp->cl_lock);
974
975 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
976 free_conn(c);
977
978 spin_lock(&clp->cl_lock);
979 }
980 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400981}
982
J. Bruce Fields1377b692012-09-11 21:42:40 -0400983static void __free_session(struct nfsd4_session *ses)
984{
J. Bruce Fields1377b692012-09-11 21:42:40 -0400985 free_session_slots(ses);
986 kfree(ses);
987}
988
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400989static void free_session(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -0800990{
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +0300991 struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
992
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400993 lockdep_assert_held(&nn->client_lock);
994 nfsd4_del_conns(ses);
J. Bruce Fields55c760c2013-04-08 16:44:14 -0400995 nfsd4_put_drc_mem(&ses->se_fchannel);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400996 __free_session(ses);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -0400997}
Andy Adamson557ce262009-08-28 08:45:04 -0400998
Fengguang Wu135ae822012-11-10 07:20:25 -0500999static 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 -04001000{
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001001 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001002 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001003
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001004 new->se_client = clp;
1005 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001006
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001007 INIT_LIST_HEAD(&new->se_conns);
1008
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001009 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001010 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -04001011 new->se_cb_prog = cses->callback_prog;
J. Bruce Fieldsc6bb3ca2012-11-01 16:31:02 -04001012 new->se_cb_sec = cses->cb_sec;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001013 atomic_set(&new->se_ref, 0);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001014 idx = hash_sessionid(&new->se_sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001015 spin_lock(&nn->client_lock);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001016 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001017 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001018 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001019 spin_unlock(&clp->cl_lock);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001020 spin_unlock(&nn->client_lock);
Kinglong Mee60810e52014-01-01 00:35:47 +08001021
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001022 if (cses->flags & SESSION4_BACK_CHAN) {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001023 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001024 /*
1025 * This is a little silly; with sessions there's no real
1026 * use for the callback address. Use the peer address
1027 * as a reasonable default for now, but consider fixing
1028 * the rpc client not to require an address in the
1029 * future:
1030 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001031 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1032 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001033 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001034}
1035
Benny Halevy9089f1b2010-05-12 00:12:26 +03001036/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +03001037static struct nfsd4_session *
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001038find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
Marc Eshel5282fd72009-04-03 08:27:52 +03001039{
1040 struct nfsd4_session *elem;
1041 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001042 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Marc Eshel5282fd72009-04-03 08:27:52 +03001043
1044 dump_sessionid(__func__, sessionid);
1045 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +03001046 /* Search in the appropriate list */
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001047 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +03001048 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1049 NFS4_MAX_SESSIONID_LEN)) {
1050 return elem;
1051 }
1052 }
1053
1054 dprintk("%s: session not found\n", __func__);
1055 return NULL;
1056}
1057
Benny Halevy9089f1b2010-05-12 00:12:26 +03001058/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +03001059static void
Marc Eshel5282fd72009-04-03 08:27:52 +03001060unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +03001061{
1062 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001063 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +03001064 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001065 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +03001066}
1067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1069static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001070STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071{
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001072 if (clid->cl_boot == nn->boot_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +03001074 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001075 clid->cl_boot, clid->cl_id, nn->boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 return 1;
1077}
1078
1079/*
1080 * XXX Should we use a slab cache ?
1081 * This type of memory management is somewhat inefficient, but we use it
1082 * anyway since SETCLIENTID is not a common operation.
1083 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001084static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085{
1086 struct nfs4_client *clp;
1087
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001088 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1089 if (clp == NULL)
1090 return NULL;
Thomas Meyer67114fe2011-11-17 23:43:40 +01001091 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001092 if (clp->cl_name.data == NULL) {
1093 kfree(clp);
1094 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 }
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001096 clp->cl_name.len = name.len;
Trond Myklebust5694c932014-04-18 14:43:56 -04001097 INIT_LIST_HEAD(&clp->cl_sessions);
1098 idr_init(&clp->cl_stateids);
1099 atomic_set(&clp->cl_refcount, 0);
1100 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1101 INIT_LIST_HEAD(&clp->cl_idhash);
1102 INIT_LIST_HEAD(&clp->cl_openowners);
1103 INIT_LIST_HEAD(&clp->cl_delegations);
1104 INIT_LIST_HEAD(&clp->cl_lru);
1105 INIT_LIST_HEAD(&clp->cl_callbacks);
1106 INIT_LIST_HEAD(&clp->cl_revoked);
1107 spin_lock_init(&clp->cl_lock);
1108 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 return clp;
1110}
1111
Trond Myklebust4dd86e152014-04-18 14:43:58 -04001112static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113free_client(struct nfs4_client *clp)
1114{
Stanislav Kinsburskybca0ec62013-01-09 12:38:34 +03001115 struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001116
1117 lockdep_assert_held(&nn->client_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001118 while (!list_empty(&clp->cl_sessions)) {
1119 struct nfsd4_session *ses;
1120 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1121 se_perclnt);
1122 list_del(&ses->se_perclnt);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001123 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1124 free_session(ses);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001125 }
Trond Myklebust4cb57e32014-04-18 14:43:57 -04001126 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001127 free_svc_cred(&clp->cl_cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 kfree(clp->cl_name.data);
majianpeng2d32b292013-01-29 13:16:06 +08001129 idr_destroy(&clp->cl_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 kfree(clp);
1131}
1132
Benny Halevy84d38ac2010-05-12 00:13:16 +03001133/* must be called under the client_lock */
1134static inline void
1135unhash_client_locked(struct nfs4_client *clp)
1136{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001137 struct nfsd4_session *ses;
1138
Benny Halevy84d38ac2010-05-12 00:13:16 +03001139 list_del(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001140 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001141 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1142 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001143 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001144}
1145
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146static void
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001147destroy_client(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001149 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 struct list_head reaplist;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001152 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 INIT_LIST_HEAD(&reaplist);
1155 spin_lock(&recall_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001156 while (!list_empty(&clp->cl_delegations)) {
1157 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
NeilBrownea1da632005-06-23 22:04:17 -07001158 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 list_move(&dp->dl_recall_lru, &reaplist);
1160 }
1161 spin_unlock(&recall_lock);
1162 while (!list_empty(&reaplist)) {
1163 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04001164 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 }
Benny Halevy956c4fe2013-10-29 11:39:12 +02001166 list_splice_init(&clp->cl_revoked, &reaplist);
1167 while (!list_empty(&reaplist)) {
1168 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1169 destroy_revoked_delegation(dp);
1170 }
NeilBrownea1da632005-06-23 22:04:17 -07001171 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001172 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1173 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 }
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001175 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001176 if (clp->cl_cb_conn.cb_xprt)
1177 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001178 list_del(&clp->cl_idhash);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001179 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001180 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001181 else
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001182 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001183 spin_lock(&nn->client_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001184 unhash_client_locked(clp);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001185 WARN_ON_ONCE(atomic_read(&clp->cl_refcount));
1186 free_client(clp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001187 spin_unlock(&nn->client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188}
1189
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001190static void expire_client(struct nfs4_client *clp)
1191{
1192 nfsd4_client_record_remove(clp);
1193 destroy_client(clp);
1194}
1195
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001196static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1197{
1198 memcpy(target->cl_verifier.data, source->data,
1199 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200}
1201
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001202static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1203{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1205 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1206}
1207
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001208static int copy_cred(struct svc_cred *target, struct svc_cred *source)
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001209{
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001210 if (source->cr_principal) {
1211 target->cr_principal =
1212 kstrdup(source->cr_principal, GFP_KERNEL);
1213 if (target->cr_principal == NULL)
1214 return -ENOMEM;
1215 } else
1216 target->cr_principal = NULL;
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001217 target->cr_flavor = source->cr_flavor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 target->cr_uid = source->cr_uid;
1219 target->cr_gid = source->cr_gid;
1220 target->cr_group_info = source->cr_group_info;
1221 get_group_info(target->cr_group_info);
J. Bruce Fields0dc15312013-05-14 16:07:13 -04001222 target->cr_gss_mech = source->cr_gss_mech;
1223 if (source->cr_gss_mech)
1224 gss_mech_get(source->cr_gss_mech);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001225 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226}
1227
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001228static long long
1229compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1230{
1231 long long res;
1232
1233 res = o1->len - o2->len;
1234 if (res)
1235 return res;
1236 return (long long)memcmp(o1->data, o2->data, o1->len);
1237}
1238
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001239static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001240{
NeilBrowna55370a2005-06-23 22:03:52 -07001241 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
1244static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001245same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1246{
1247 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
1250static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001251same_clid(clientid_t *cl1, clientid_t *cl2)
1252{
1253 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254}
1255
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001256static bool groups_equal(struct group_info *g1, struct group_info *g2)
1257{
1258 int i;
1259
1260 if (g1->ngroups != g2->ngroups)
1261 return false;
1262 for (i=0; i<g1->ngroups; i++)
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001263 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001264 return false;
1265 return true;
1266}
1267
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001268/*
1269 * RFC 3530 language requires clid_inuse be returned when the
1270 * "principal" associated with a requests differs from that previously
1271 * used. We use uid, gid's, and gss principal string as our best
1272 * approximation. We also don't want to allow non-gss use of a client
1273 * established using gss: in theory cr_principal should catch that
1274 * change, but in practice cr_principal can be null even in the gss case
1275 * since gssd doesn't always pass down a principal string.
1276 */
1277static bool is_gss_cred(struct svc_cred *cr)
1278{
1279 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1280 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1281}
1282
1283
Vivek Trivedi5559b502012-07-24 21:18:20 +05301284static bool
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001285same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1286{
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001287 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001288 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1289 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001290 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1291 return false;
1292 if (cr1->cr_principal == cr2->cr_principal)
1293 return true;
1294 if (!cr1->cr_principal || !cr2->cr_principal)
1295 return false;
Vivek Trivedi5559b502012-07-24 21:18:20 +05301296 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297}
1298
J. Bruce Fields57266a62013-04-13 14:27:29 -04001299static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1300{
1301 struct svc_cred *cr = &rqstp->rq_cred;
1302 u32 service;
1303
J. Bruce Fieldsc4720592013-08-07 11:41:49 -04001304 if (!cr->cr_gss_mech)
1305 return false;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001306 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1307 return service == RPC_GSS_SVC_INTEGRITY ||
1308 service == RPC_GSS_SVC_PRIVACY;
1309}
1310
1311static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1312{
1313 struct svc_cred *cr = &rqstp->rq_cred;
1314
1315 if (!cl->cl_mach_cred)
1316 return true;
1317 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1318 return false;
1319 if (!svc_rqst_integrity_protected(rqstp))
1320 return false;
1321 if (!cr->cr_principal)
1322 return false;
1323 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1324}
1325
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001326static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001327{
1328 static u32 current_clientid = 1;
1329
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001330 clp->cl_clientid.cl_boot = nn->boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 clp->cl_clientid.cl_id = current_clientid++;
1332}
1333
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001334static void gen_confirm(struct nfs4_client *clp)
1335{
Chuck Leverab4684d2012-03-02 17:13:50 -05001336 __be32 verf[2];
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001337 static u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
Chuck Leverab4684d2012-03-02 17:13:50 -05001339 verf[0] = (__be32)get_seconds();
1340 verf[1] = (__be32)i++;
1341 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342}
1343
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001344static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001345{
J. Bruce Fields3abdb602013-02-03 12:23:01 -05001346 struct nfs4_stid *ret;
1347
1348 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1349 if (!ret || !ret->sc_type)
1350 return NULL;
1351 return ret;
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001352}
1353
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001354static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001355{
1356 struct nfs4_stid *s;
1357
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001358 s = find_stateid(cl, t);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001359 if (!s)
1360 return NULL;
1361 if (typemask & s->sc_type)
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001362 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04001363 return NULL;
1364}
1365
Jeff Layton2216d442012-11-12 15:00:57 -05001366static struct nfs4_client *create_client(struct xdr_netobj name,
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001367 struct svc_rqst *rqstp, nfs4_verifier *verf)
1368{
1369 struct nfs4_client *clp;
1370 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001371 int ret;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001372 struct net *net = SVC_NET(rqstp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001373 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001374
1375 clp = alloc_client(name);
1376 if (clp == NULL)
1377 return NULL;
1378
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001379 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1380 if (ret) {
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001381 spin_lock(&nn->client_lock);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001382 free_client(clp);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03001383 spin_unlock(&nn->client_lock);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001384 return NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001385 }
J. Bruce Fields57725152012-11-05 15:10:26 -05001386 nfsd4_init_callback(&clp->cl_cb_null);
Benny Halevy07cd4902010-05-12 00:13:41 +03001387 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001388 clear_bit(0, &clp->cl_cb_slot_busy);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001389 copy_verf(clp, verf);
1390 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001391 gen_confirm(clp);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001392 clp->cl_cb_session = NULL;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001393 clp->net = net;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001394 return clp;
1395}
1396
NeilBrownfd39ca92005-06-23 22:04:03 -07001397static void
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001398add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1399{
1400 struct rb_node **new = &(root->rb_node), *parent = NULL;
1401 struct nfs4_client *clp;
1402
1403 while (*new) {
1404 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1405 parent = *new;
1406
1407 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1408 new = &((*new)->rb_left);
1409 else
1410 new = &((*new)->rb_right);
1411 }
1412
1413 rb_link_node(&new_clp->cl_namenode, parent, new);
1414 rb_insert_color(&new_clp->cl_namenode, root);
1415}
1416
1417static struct nfs4_client *
1418find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1419{
1420 long long cmp;
1421 struct rb_node *node = root->rb_node;
1422 struct nfs4_client *clp;
1423
1424 while (node) {
1425 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1426 cmp = compare_blob(&clp->cl_name, name);
1427 if (cmp > 0)
1428 node = node->rb_left;
1429 else if (cmp < 0)
1430 node = node->rb_right;
1431 else
1432 return clp;
1433 }
1434 return NULL;
1435}
1436
1437static void
1438add_to_unconfirmed(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439{
1440 unsigned int idhashval;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001441 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001443 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001444 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001446 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
Benny Halevy36acb662010-05-12 00:13:04 +03001447 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448}
1449
NeilBrownfd39ca92005-06-23 22:04:03 -07001450static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451move_to_confirmed(struct nfs4_client *clp)
1452{
1453 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001454 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
1456 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001457 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001458 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001459 add_clp_to_name_tree(clp, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001460 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 renew_client(clp);
1462}
1463
1464static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001465find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
1467 struct nfs4_client *clp;
1468 unsigned int idhashval = clientid_hashval(clid->cl_id);
1469
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001470 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001471 if (same_clid(&clp->cl_clientid, clid)) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001472 if ((bool)clp->cl_minorversion != sessions)
1473 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001474 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 }
1478 return NULL;
1479}
1480
1481static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001482find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1483{
1484 struct list_head *tbl = nn->conf_id_hashtbl;
1485
1486 return find_client_in_id_table(tbl, clid, sessions);
1487}
1488
1489static struct nfs4_client *
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001490find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491{
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001492 struct list_head *tbl = nn->unconf_id_hashtbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04001494 return find_client_in_id_table(tbl, clid, sessions);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495}
1496
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001497static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001498{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001499 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001500}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001501
NeilBrown28ce6052005-06-23 22:03:56 -07001502static struct nfs4_client *
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001503find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07001504{
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001505 return find_clp_in_name_tree(name, &nn->conf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07001506}
1507
1508static struct nfs4_client *
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001509find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07001510{
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001511 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07001512}
1513
NeilBrownfd39ca92005-06-23 22:04:03 -07001514static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001515gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516{
J. Bruce Fields07263f12010-05-31 19:09:40 -04001517 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001518 struct sockaddr *sa = svc_addr(rqstp);
1519 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04001520 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521
Jeff Layton7077ecb2009-08-14 12:57:58 -04001522 /* Currently, we only support tcp and tcp6 for the callback channel */
1523 if (se->se_callback_netid_len == 3 &&
1524 !memcmp(se->se_callback_netid_val, "tcp", 3))
1525 expected_family = AF_INET;
1526 else if (se->se_callback_netid_len == 4 &&
1527 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1528 expected_family = AF_INET6;
1529 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 goto out_err;
1531
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001532 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001533 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04001534 (struct sockaddr *)&conn->cb_addr,
1535 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001536
J. Bruce Fields07263f12010-05-31 19:09:40 -04001537 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001539
J. Bruce Fields07263f12010-05-31 19:09:40 -04001540 if (conn->cb_addr.ss_family == AF_INET6)
1541 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04001542
J. Bruce Fields07263f12010-05-31 19:09:40 -04001543 conn->cb_prog = se->se_callback_prog;
1544 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08001545 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 return;
1547out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04001548 conn->cb_addr.ss_family = AF_UNSPEC;
1549 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07001550 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 "will not receive delegations\n",
1552 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1553
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 return;
1555}
1556
Andy Adamson074fe892009-04-03 08:28:15 +03001557/*
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04001558 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03001559 */
1560void
1561nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1562{
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001563 struct xdr_buf *buf = resp->xdr.buf;
Andy Adamson557ce262009-08-28 08:45:04 -04001564 struct nfsd4_slot *slot = resp->cstate.slot;
1565 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03001566
Andy Adamson557ce262009-08-28 08:45:04 -04001567 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001568
Andy Adamson557ce262009-08-28 08:45:04 -04001569 slot->sl_opcnt = resp->opcnt;
1570 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001571
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05001572 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001573 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04001574 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001575 return;
1576 }
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001577 base = resp->cstate.data_offset;
1578 slot->sl_datalen = buf->len - base;
1579 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
Andy Adamson557ce262009-08-28 08:45:04 -04001580 WARN("%s: sessions DRC could not cache compound\n", __func__);
1581 return;
Andy Adamson074fe892009-04-03 08:28:15 +03001582}
1583
1584/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04001585 * Encode the replay sequence operation from the slot values.
1586 * If cachethis is FALSE encode the uncached rep error on the next
1587 * operation which sets resp->p and increments resp->opcnt for
1588 * nfs4svc_encode_compoundres.
1589 *
Andy Adamson074fe892009-04-03 08:28:15 +03001590 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04001591static __be32
1592nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1593 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03001594{
Andy Adamsonabfabf82009-07-23 19:02:18 -04001595 struct nfsd4_op *op;
1596 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001597
Andy Adamsonabfabf82009-07-23 19:02:18 -04001598 /* Encode the replayed sequence operation */
1599 op = &args->ops[resp->opcnt - 1];
1600 nfsd4_encode_operation(resp, op);
1601
1602 /* Return nfserr_retry_uncached_rep in next operation. */
J. Bruce Fields73e79482012-02-13 16:39:00 -05001603 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04001604 op = &args->ops[resp->opcnt++];
1605 op->status = nfserr_retry_uncached_rep;
1606 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03001607 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04001608 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03001609}
1610
1611/*
Andy Adamson557ce262009-08-28 08:45:04 -04001612 * The sequence operation is not cached because we can use the slot and
1613 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03001614 */
J. Bruce Fields3ca2eb92014-03-21 12:04:21 -04001615static __be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03001616nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1617 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03001618{
Andy Adamson557ce262009-08-28 08:45:04 -04001619 struct nfsd4_slot *slot = resp->cstate.slot;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001620 struct xdr_stream *xdr = &resp->xdr;
1621 __be32 *p;
Andy Adamson074fe892009-04-03 08:28:15 +03001622 __be32 status;
1623
Andy Adamson557ce262009-08-28 08:45:04 -04001624 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001625
Andy Adamsonabfabf82009-07-23 19:02:18 -04001626 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
J. Bruce Fields0da7b192014-03-21 11:43:34 -04001627 if (status)
Andy Adamsonabfabf82009-07-23 19:02:18 -04001628 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03001629
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001630 p = xdr_reserve_space(xdr, slot->sl_datalen);
1631 if (!p) {
1632 WARN_ON_ONCE(1);
1633 return nfserr_serverfault;
1634 }
1635 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
1636 xdr_commit_encode(xdr);
Andy Adamson074fe892009-04-03 08:28:15 +03001637
Andy Adamson557ce262009-08-28 08:45:04 -04001638 resp->opcnt = slot->sl_opcnt;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04001639 return slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03001640}
1641
Andy Adamson0733d212009-04-03 08:28:01 +03001642/*
1643 * Set the exchange_id flags returned by the server.
1644 */
1645static void
1646nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1647{
1648 /* pNFS is not supported */
1649 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1650
1651 /* Referrals are supported, Migration is not. */
1652 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1653
1654 /* set the wire flags to return to client. */
1655 clid->flags = new->cl_exchange_flags;
1656}
1657
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001658static bool client_has_state(struct nfs4_client *clp)
1659{
1660 /*
1661 * Note clp->cl_openowners check isn't quite right: there's no
1662 * need to count owners without stateid's.
1663 *
1664 * Also note we should probably be using this in 4.0 case too.
1665 */
J. Bruce Fields6eccece2012-05-29 16:37:44 -04001666 return !list_empty(&clp->cl_openowners)
1667 || !list_empty(&clp->cl_delegations)
1668 || !list_empty(&clp->cl_sessions);
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001669}
1670
Al Virob37ad282006-10-19 23:28:59 -07001671__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03001672nfsd4_exchange_id(struct svc_rqst *rqstp,
1673 struct nfsd4_compound_state *cstate,
1674 struct nfsd4_exchange_id *exid)
1675{
Andy Adamson0733d212009-04-03 08:28:01 +03001676 struct nfs4_client *unconf, *conf, *new;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001677 __be32 status;
Jeff Layton363168b2009-08-14 12:57:56 -04001678 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03001679 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04001680 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001681 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001682 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamson0733d212009-04-03 08:28:01 +03001683
Jeff Layton363168b2009-08-14 12:57:56 -04001684 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03001685 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04001686 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03001687 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04001688 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03001689
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001690 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03001691 return nfserr_inval;
1692
Andy Adamson0733d212009-04-03 08:28:01 +03001693 switch (exid->spa_how) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04001694 case SP4_MACH_CRED:
1695 if (!svc_rqst_integrity_protected(rqstp))
1696 return nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03001697 case SP4_NONE:
1698 break;
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05001699 default: /* checked by xdr code */
1700 WARN_ON_ONCE(1);
Andy Adamson0733d212009-04-03 08:28:01 +03001701 case SP4_SSV:
J. Bruce Fieldsdd303332013-04-12 18:10:56 -04001702 return nfserr_encr_alg_unsupp;
Andy Adamson0733d212009-04-03 08:28:01 +03001703 }
1704
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001705 /* Cases below refer to rfc 5661 section 18.35.4: */
Andy Adamson0733d212009-04-03 08:28:01 +03001706 nfs4_lock_state();
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001707 conf = find_confirmed_client_by_name(&exid->clname, nn);
Andy Adamson0733d212009-04-03 08:28:01 +03001708 if (conf) {
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001709 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
1710 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
1711
J. Bruce Fields136e6582012-05-12 20:37:23 -04001712 if (update) {
1713 if (!clp_used_exchangeid(conf)) { /* buggy client */
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001714 status = nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03001715 goto out;
1716 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04001717 if (!mach_creds_match(conf, rqstp)) {
1718 status = nfserr_wrong_cred;
1719 goto out;
1720 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001721 if (!creds_match) { /* case 9 */
Andy Adamson0733d212009-04-03 08:28:01 +03001722 status = nfserr_perm;
1723 goto out;
1724 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001725 if (!verfs_match) { /* case 8 */
Andy Adamson0733d212009-04-03 08:28:01 +03001726 status = nfserr_not_same;
1727 goto out;
1728 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001729 /* case 6 */
1730 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1731 new = conf;
1732 goto out_copy;
Andy Adamson0733d212009-04-03 08:28:01 +03001733 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001734 if (!creds_match) { /* case 3 */
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001735 if (client_has_state(conf)) {
1736 status = nfserr_clid_inuse;
1737 goto out;
1738 }
Andy Adamson0733d212009-04-03 08:28:01 +03001739 expire_client(conf);
1740 goto out_new;
1741 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001742 if (verfs_match) { /* case 2 */
J. Bruce Fields0f1ba0e2012-05-25 21:24:40 -04001743 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04001744 new = conf;
1745 goto out_copy;
1746 }
1747 /* case 5, client reboot */
J. Bruce Fields136e6582012-05-12 20:37:23 -04001748 goto out_new;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001749 }
1750
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001751 if (update) { /* case 7 */
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001752 status = nfserr_noent;
1753 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001754 }
1755
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03001756 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001757 if (unconf) /* case 4, possible retry or client restart */
Andy Adamson0733d212009-04-03 08:28:01 +03001758 expire_client(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03001759
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001760 /* case 1 (normal case) */
Andy Adamson0733d212009-04-03 08:28:01 +03001761out_new:
Jeff Layton2216d442012-11-12 15:00:57 -05001762 new = create_client(exid->clname, rqstp, &verf);
Andy Adamson0733d212009-04-03 08:28:01 +03001763 if (new == NULL) {
J. Bruce Fields47310302010-06-22 16:17:12 -04001764 status = nfserr_jukebox;
Andy Adamson0733d212009-04-03 08:28:01 +03001765 goto out;
1766 }
J. Bruce Fields4f540e22013-05-07 11:57:52 -04001767 new->cl_minorversion = cstate->minorversion;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001768 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
Andy Adamson0733d212009-04-03 08:28:01 +03001769
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001770 gen_clid(new, nn);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001771 add_to_unconfirmed(new);
Andy Adamson0733d212009-04-03 08:28:01 +03001772out_copy:
1773 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1774 exid->clientid.cl_id = new->cl_clientid.cl_id;
1775
J. Bruce Fields778df3f2012-05-25 21:40:23 -04001776 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001777 nfsd4_set_ex_flags(new, exid);
1778
1779 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001780 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03001781 status = nfs_ok;
1782
1783out:
1784 nfs4_unlock_state();
Andy Adamson0733d212009-04-03 08:28:01 +03001785 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001786}
1787
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001788static __be32
Andy Adamson88e588d2009-07-23 19:02:15 -04001789check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001790{
Andy Adamson88e588d2009-07-23 19:02:15 -04001791 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1792 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001793
1794 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04001795 if (slot_inuse) {
1796 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001797 return nfserr_jukebox;
1798 else
1799 return nfserr_seq_misordered;
1800 }
J. Bruce Fieldsf6d82482012-02-13 16:13:41 -05001801 /* Note unsigned 32-bit arithmetic handles wraparound: */
Andy Adamson88e588d2009-07-23 19:02:15 -04001802 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03001803 return nfs_ok;
Andy Adamson88e588d2009-07-23 19:02:15 -04001804 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001805 return nfserr_replay_cache;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001806 return nfserr_seq_misordered;
1807}
1808
Andy Adamson49557cc2009-07-23 19:02:16 -04001809/*
1810 * Cache the create session result into the create session single DRC
1811 * slot cache by saving the xdr structure. sl_seqid has been set.
1812 * Do this for solo or embedded create session operations.
1813 */
1814static void
1815nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001816 struct nfsd4_clid_slot *slot, __be32 nfserr)
Andy Adamson49557cc2009-07-23 19:02:16 -04001817{
1818 slot->sl_status = nfserr;
1819 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1820}
1821
1822static __be32
1823nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1824 struct nfsd4_clid_slot *slot)
1825{
1826 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1827 return slot->sl_status;
1828}
1829
Mi Jinlong1b74c252011-07-14 14:50:17 +08001830#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1831 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1832 1 + /* MIN tag is length with zero, only length */ \
1833 3 + /* version, opcount, opcode */ \
1834 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1835 /* seqid, slotID, slotID, cache */ \
1836 4 ) * sizeof(__be32))
1837
1838#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1839 2 + /* verifier: AUTH_NULL, length 0 */\
1840 1 + /* status */ \
1841 1 + /* MIN tag is length with zero, only length */ \
1842 3 + /* opcount, opcode, opstatus*/ \
1843 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1844 /* seqid, slotID, slotID, slotID, status */ \
1845 5 ) * sizeof(__be32))
1846
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001847static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
Mi Jinlong1b74c252011-07-14 14:50:17 +08001848{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001849 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
1850
J. Bruce Fields373cd402013-04-08 15:42:12 -04001851 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
1852 return nfserr_toosmall;
1853 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
1854 return nfserr_toosmall;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001855 ca->headerpadsz = 0;
1856 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
1857 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
1858 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
1859 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
1860 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
1861 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
1862 /*
1863 * Note decreasing slot size below client's request may make it
1864 * difficult for client to function correctly, whereas
1865 * decreasing the number of slots will (just?) affect
1866 * performance. When short on memory we therefore prefer to
1867 * decrease number of slots instead of their size. Clients that
1868 * request larger slots than they need will get poor results:
1869 */
1870 ca->maxreqs = nfsd4_get_drc_mem(ca);
1871 if (!ca->maxreqs)
1872 return nfserr_jukebox;
1873
J. Bruce Fields373cd402013-04-08 15:42:12 -04001874 return nfs_ok;
Mi Jinlong1b74c252011-07-14 14:50:17 +08001875}
1876
Kinglong Mee8a891632013-12-23 18:11:02 +08001877#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
1878 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
1879#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
1880 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
1881
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001882static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
1883{
1884 ca->headerpadsz = 0;
1885
1886 /*
1887 * These RPC_MAX_HEADER macros are overkill, especially since we
1888 * don't even do gss on the backchannel yet. But this is still
1889 * less than 1k. Tighten up this estimate in the unlikely event
1890 * it turns out to be a problem for some client:
1891 */
Kinglong Mee8a891632013-12-23 18:11:02 +08001892 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001893 return nfserr_toosmall;
Kinglong Mee8a891632013-12-23 18:11:02 +08001894 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001895 return nfserr_toosmall;
1896 ca->maxresp_cached = 0;
1897 if (ca->maxops < 2)
1898 return nfserr_toosmall;
1899
1900 return nfs_ok;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001901}
1902
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04001903static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
1904{
1905 switch (cbs->flavor) {
1906 case RPC_AUTH_NULL:
1907 case RPC_AUTH_UNIX:
1908 return nfs_ok;
1909 default:
1910 /*
1911 * GSS case: the spec doesn't allow us to return this
1912 * error. But it also doesn't allow us not to support
1913 * GSS.
1914 * I'd rather this fail hard than return some error the
1915 * client might think it can already handle:
1916 */
1917 return nfserr_encr_alg_unsupp;
1918 }
1919}
1920
Andy Adamson069b6ad2009-04-03 08:27:58 +03001921__be32
1922nfsd4_create_session(struct svc_rqst *rqstp,
1923 struct nfsd4_compound_state *cstate,
1924 struct nfsd4_create_session *cr_ses)
1925{
Jeff Layton363168b2009-08-14 12:57:56 -04001926 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001927 struct nfs4_client *conf, *unconf;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001928 struct nfsd4_session *new;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001929 struct nfsd4_conn *conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001930 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001931 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001932 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001933
Mi Jinlonga62573d2011-03-23 17:57:07 +08001934 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
1935 return nfserr_inval;
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04001936 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
1937 if (status)
1938 return status;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001939 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
J. Bruce Fields373cd402013-04-08 15:42:12 -04001940 if (status)
1941 return status;
J. Bruce Fields06b332a2013-04-09 11:34:36 -04001942 status = check_backchannel_attrs(&cr_ses->back_channel);
1943 if (status)
Kinglong Meef403e452013-12-23 17:31:21 +08001944 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001945 status = nfserr_jukebox;
Kinglong Mee60810e52014-01-01 00:35:47 +08001946 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001947 if (!new)
1948 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001949 conn = alloc_conn_from_crses(rqstp, cr_ses);
1950 if (!conn)
1951 goto out_free_session;
Mi Jinlonga62573d2011-03-23 17:57:07 +08001952
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001953 nfs4_lock_state();
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03001954 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03001955 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04001956 WARN_ON_ONCE(conf && unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001957
1958 if (conf) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04001959 status = nfserr_wrong_cred;
1960 if (!mach_creds_match(conf, rqstp))
1961 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001962 cs_slot = &conf->cl_cs_slot;
1963 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001964 if (status == nfserr_replay_cache) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001965 status = nfsd4_replay_create_session(cr_ses, cs_slot);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001966 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001967 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001968 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001969 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001970 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001971 } else if (unconf) {
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04001972 struct nfs4_client *old;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001973 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04001974 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001975 status = nfserr_clid_inuse;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001976 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001977 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04001978 status = nfserr_wrong_cred;
1979 if (!mach_creds_match(unconf, rqstp))
1980 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04001981 cs_slot = &unconf->cl_cs_slot;
1982 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001983 if (status) {
1984 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001985 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001986 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001987 }
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03001988 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001989 if (old) {
1990 status = mark_client_expired(old);
1991 if (status)
1992 goto out_free_conn;
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04001993 expire_client(old);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001994 }
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04001995 move_to_confirmed(unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001996 conf = unconf;
1997 } else {
1998 status = nfserr_stale_clientid;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04001999 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002000 }
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002001 status = nfs_ok;
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002002 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04002003 * We do not support RDMA or persistent sessions
2004 */
2005 cr_ses->flags &= ~SESSION4_PERSIST;
2006 cr_ses->flags &= ~SESSION4_RDMA;
2007
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002008 init_session(rqstp, new, conf, cr_ses);
2009 nfsd4_init_conn(rqstp, conn, new);
2010
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002011 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002012 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04002013 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04002014 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002015
Andy Adamson49557cc2009-07-23 19:02:16 -04002016 /* cache solo and embedded create sessions under the state lock */
2017 nfsd4_cache_create_session(cr_ses, cs_slot, status);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002018 nfs4_unlock_state();
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002019 return status;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002020out_free_conn:
Yanchuan Nian266533c2012-12-24 18:11:45 +08002021 nfs4_unlock_state();
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002022 free_conn(conn);
2023out_free_session:
2024 __free_session(new);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002025out_release_drc_mem:
2026 nfsd4_put_drc_mem(&cr_ses->fore_channel);
J. Bruce Fields1ca50792013-03-14 18:12:03 -04002027 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002028}
2029
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002030static __be32 nfsd4_map_bcts_dir(u32 *dir)
2031{
2032 switch (*dir) {
2033 case NFS4_CDFC4_FORE:
2034 case NFS4_CDFC4_BACK:
2035 return nfs_ok;
2036 case NFS4_CDFC4_FORE_OR_BOTH:
2037 case NFS4_CDFC4_BACK_OR_BOTH:
2038 *dir = NFS4_CDFC4_BOTH;
2039 return nfs_ok;
2040 };
2041 return nfserr_inval;
2042}
2043
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002044__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2045{
2046 struct nfsd4_session *session = cstate->session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002047 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002048 __be32 status;
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002049
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002050 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2051 if (status)
2052 return status;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002053 spin_lock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002054 session->se_cb_prog = bc->bc_cb_program;
2055 session->se_cb_sec = bc->bc_cb_sec;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002056 spin_unlock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002057
2058 nfsd4_probe_callback(session->se_client);
2059
2060 return nfs_ok;
2061}
2062
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002063__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2064 struct nfsd4_compound_state *cstate,
2065 struct nfsd4_bind_conn_to_session *bcts)
2066{
2067 __be32 status;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002068 struct nfsd4_conn *conn;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002069 struct nfsd4_session *session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002070 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002071
2072 if (!nfsd4_last_compound_op(rqstp))
2073 return nfserr_not_only_op;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002074 nfs4_lock_state();
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002075 spin_lock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002076 session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp));
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002077 spin_unlock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002078 status = nfserr_badsession;
2079 if (!session)
2080 goto out;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002081 status = nfserr_wrong_cred;
2082 if (!mach_creds_match(session->se_client, rqstp))
2083 goto out;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002084 status = nfsd4_map_bcts_dir(&bcts->dir);
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002085 if (status)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002086 goto out;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002087 conn = alloc_conn(rqstp, bcts->dir);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002088 status = nfserr_jukebox;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002089 if (!conn)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002090 goto out;
2091 nfsd4_init_conn(rqstp, conn, session);
2092 status = nfs_ok;
2093out:
2094 nfs4_unlock_state();
2095 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002096}
2097
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002098static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2099{
2100 if (!session)
2101 return 0;
2102 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2103}
2104
Andy Adamson069b6ad2009-04-03 08:27:58 +03002105__be32
2106nfsd4_destroy_session(struct svc_rqst *r,
2107 struct nfsd4_compound_state *cstate,
2108 struct nfsd4_destroy_session *sessionid)
2109{
Benny Halevye10e0cf2009-04-03 08:28:38 +03002110 struct nfsd4_session *ses;
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002111 __be32 status;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002112 int ref_held_by_me = 0;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002113 struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002114
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002115 nfs4_lock_state();
2116 status = nfserr_not_only_op;
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002117 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04002118 if (!nfsd4_last_compound_op(r))
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002119 goto out;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002120 ref_held_by_me++;
J. Bruce Fields57716352010-04-21 12:27:19 -04002121 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03002122 dump_sessionid(__func__, &sessionid->sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002123 spin_lock(&nn->client_lock);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03002124 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r));
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002125 status = nfserr_badsession;
2126 if (!ses)
2127 goto out_client_lock;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002128 status = nfserr_wrong_cred;
2129 if (!mach_creds_match(ses->se_client, r))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002130 goto out_client_lock;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002131 nfsd4_get_session_locked(ses);
2132 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002133 if (status)
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002134 goto out_put_session;
Benny Halevye10e0cf2009-04-03 08:28:38 +03002135 unhash_session(ses);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002136 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002137
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05002138 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04002139
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002140 spin_lock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002141 status = nfs_ok;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002142out_put_session:
2143 nfsd4_put_session(ses);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002144out_client_lock:
2145 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002146out:
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002147 nfs4_unlock_state();
Benny Halevye10e0cf2009-04-03 08:28:38 +03002148 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002149}
2150
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002151static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002152{
2153 struct nfsd4_conn *c;
2154
2155 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002156 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04002157 return c;
2158 }
2159 }
2160 return NULL;
2161}
2162
J. Bruce Fields57266a62013-04-13 14:27:29 -04002163static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002164{
2165 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002166 struct nfsd4_conn *c;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002167 __be32 status = nfs_ok;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002168 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002169
2170 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002171 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002172 if (c)
2173 goto out_free;
2174 status = nfserr_conn_not_bound_to_session;
2175 if (clp->cl_mach_cred)
2176 goto out_free;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002177 __nfsd4_hash_conn(new, ses);
2178 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002179 ret = nfsd4_register_conn(new);
2180 if (ret)
2181 /* oops; xprt is already down: */
2182 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002183 return nfs_ok;
2184out_free:
2185 spin_unlock(&clp->cl_lock);
2186 free_conn(new);
2187 return status;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002188}
2189
Mi Jinlong868b89c2011-04-27 09:09:58 +08002190static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2191{
2192 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2193
2194 return args->opcnt > session->se_fchannel.maxops;
2195}
2196
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002197static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2198 struct nfsd4_session *session)
2199{
2200 struct xdr_buf *xb = &rqstp->rq_arg;
2201
2202 return xb->len > session->se_fchannel.maxreq_sz;
2203}
2204
Andy Adamson069b6ad2009-04-03 08:27:58 +03002205__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03002206nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002207 struct nfsd4_compound_state *cstate,
2208 struct nfsd4_sequence *seq)
2209{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002210 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002211 struct xdr_stream *xdr = &resp->xdr;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002212 struct nfsd4_session *session;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002213 struct nfs4_client *clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002214 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002215 struct nfsd4_conn *conn;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002216 __be32 status;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002217 int buflen;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002218 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002219
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002220 if (resp->opcnt != 1)
2221 return nfserr_sequence_pos;
2222
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002223 /*
2224 * Will be either used or freed by nfsd4_sequence_check_conn
2225 * below.
2226 */
2227 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2228 if (!conn)
2229 return nfserr_jukebox;
2230
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002231 spin_lock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002232 status = nfserr_badsession;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03002233 session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp));
Benny Halevyb85d4c02009-04-03 08:28:08 +03002234 if (!session)
J. Bruce Fields221a6872013-04-01 22:23:49 -04002235 goto out_no_session;
2236 clp = session->se_client;
2237 status = get_client_locked(clp);
2238 if (status)
2239 goto out_no_session;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002240 status = nfsd4_get_session_locked(session);
2241 if (status)
2242 goto out_put_client;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002243
Mi Jinlong868b89c2011-04-27 09:09:58 +08002244 status = nfserr_too_many_ops;
2245 if (nfsd4_session_too_many_ops(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002246 goto out_put_session;
Mi Jinlong868b89c2011-04-27 09:09:58 +08002247
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002248 status = nfserr_req_too_big;
2249 if (nfsd4_request_too_big(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002250 goto out_put_session;
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002251
Benny Halevyb85d4c02009-04-03 08:28:08 +03002252 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03002253 if (seq->slotid >= session->se_fchannel.maxreqs)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002254 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002255
Andy Adamson557ce262009-08-28 08:45:04 -04002256 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03002257 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2258
Andy Adamsona8dfdae2009-08-28 08:45:02 -04002259 /* We do not negotiate the number of slots yet, so set the
2260 * maxslots to the session maxreqs which is used to encode
2261 * sr_highest_slotid and the sr_target_slot id to maxslots */
2262 seq->maxslots = session->se_fchannel.maxreqs;
2263
J. Bruce Fields73e79482012-02-13 16:39:00 -05002264 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2265 slot->sl_flags & NFSD4_SLOT_INUSE);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002266 if (status == nfserr_replay_cache) {
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002267 status = nfserr_seq_misordered;
2268 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002269 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002270 cstate->slot = slot;
2271 cstate->session = session;
Andy Adamsonda3846a2009-04-03 08:28:22 +03002272 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04002273 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03002274 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03002275 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002276 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002277 }
2278 if (status)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002279 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002280
J. Bruce Fields57266a62013-04-13 14:27:29 -04002281 status = nfsd4_sequence_check_conn(conn, session);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002282 conn = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002283 if (status)
2284 goto out_put_session;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002285
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002286 buflen = (seq->cachethis) ?
2287 session->se_fchannel.maxresp_cached :
2288 session->se_fchannel.maxresp_sz;
2289 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2290 nfserr_rep_too_big;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04002291 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002292 goto out_put_session;
J. Bruce Fields32aaa622014-03-20 20:47:41 -04002293 svc_reserve(rqstp, buflen);
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002294
2295 status = nfs_ok;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002296 /* Success! bump slot seqid */
Benny Halevyb85d4c02009-04-03 08:28:08 +03002297 slot->sl_seqid = seq->seqid;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002298 slot->sl_flags |= NFSD4_SLOT_INUSE;
J. Bruce Fields73e79482012-02-13 16:39:00 -05002299 if (seq->cachethis)
2300 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002301 else
2302 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002303
2304 cstate->slot = slot;
2305 cstate->session = session;
2306
Benny Halevyb85d4c02009-04-03 08:28:08 +03002307out:
J. Bruce Fields221a6872013-04-01 22:23:49 -04002308 switch (clp->cl_cb_state) {
2309 case NFSD4_CB_DOWN:
2310 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2311 break;
2312 case NFSD4_CB_FAULT:
2313 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2314 break;
2315 default:
2316 seq->status_flags = 0;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002317 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04002318 if (!list_empty(&clp->cl_revoked))
2319 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002320out_no_session:
Kinglong Mee3f42d2c2014-03-24 11:56:59 +08002321 if (conn)
2322 free_conn(conn);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002323 spin_unlock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002324 return status;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002325out_put_session:
2326 nfsd4_put_session(session);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002327out_put_client:
2328 put_client_renew_locked(clp);
2329 goto out_no_session;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002330}
2331
Mi Jinlong345c2842011-10-20 17:51:39 +08002332__be32
2333nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2334{
2335 struct nfs4_client *conf, *unconf, *clp;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002336 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002337 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Mi Jinlong345c2842011-10-20 17:51:39 +08002338
2339 nfs4_lock_state();
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002340 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002341 conf = find_confirmed_client(&dc->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04002342 WARN_ON_ONCE(conf && unconf);
Mi Jinlong345c2842011-10-20 17:51:39 +08002343
2344 if (conf) {
2345 clp = conf;
2346
J. Bruce Fieldsc0293b02013-03-14 18:20:01 -04002347 if (client_has_state(conf)) {
Mi Jinlong345c2842011-10-20 17:51:39 +08002348 status = nfserr_clientid_busy;
2349 goto out;
2350 }
2351 } else if (unconf)
2352 clp = unconf;
2353 else {
2354 status = nfserr_stale_clientid;
2355 goto out;
2356 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002357 if (!mach_creds_match(clp, rqstp)) {
2358 status = nfserr_wrong_cred;
2359 goto out;
2360 }
Mi Jinlong345c2842011-10-20 17:51:39 +08002361 expire_client(clp);
2362out:
2363 nfs4_unlock_state();
Mi Jinlong345c2842011-10-20 17:51:39 +08002364 return status;
2365}
2366
Andy Adamson069b6ad2009-04-03 08:27:58 +03002367__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002368nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2369{
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002370 __be32 status = 0;
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002371
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002372 if (rc->rca_one_fs) {
2373 if (!cstate->current_fh.fh_dentry)
2374 return nfserr_nofilehandle;
2375 /*
2376 * We don't take advantage of the rca_one_fs case.
2377 * That's OK, it's optional, we can safely ignore it.
2378 */
2379 return nfs_ok;
2380 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002381
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002382 nfs4_lock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002383 status = nfserr_complete_already;
Jeff Laytona52d7262012-03-21 09:52:02 -04002384 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2385 &cstate->session->se_client->cl_flags))
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002386 goto out;
2387
2388 status = nfserr_stale_clientid;
2389 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002390 /*
2391 * The following error isn't really legal.
2392 * But we only get here if the client just explicitly
2393 * destroyed the client. Surely it no longer cares what
2394 * error it gets back on an operation for the dead
2395 * client.
2396 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002397 goto out;
2398
2399 status = nfs_ok;
Jeff Layton2a4317c2012-03-21 16:42:43 -04002400 nfsd4_client_record_create(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002401out:
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002402 nfs4_unlock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002403 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002404}
2405
2406__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002407nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2408 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002410 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411 nfs4_verifier clverifier = setclid->se_verf;
NeilBrown28ce6052005-06-23 22:03:56 -07002412 struct nfs4_client *conf, *unconf, *new;
Al Virob37ad282006-10-19 23:28:59 -07002413 __be32 status;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002414 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2415
J. Bruce Fields63db4632012-05-18 21:54:19 -04002416 /* Cases below refer to rfc 3530 section 14.2.33: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417 nfs4_lock_state();
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002418 conf = find_confirmed_client_by_name(&clname, nn);
NeilBrown28ce6052005-06-23 22:03:56 -07002419 if (conf) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04002420 /* case 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002422 if (clp_used_exchangeid(conf))
2423 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04002424 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04002425 char addr_str[INET6_ADDRSTRLEN];
2426 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2427 sizeof(addr_str));
2428 dprintk("NFSD: setclientid: string in use by client "
2429 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 goto out;
2431 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002433 unconf = find_unconfirmed_client_by_name(&clname, nn);
J. Bruce Fields8f930712012-05-18 22:06:41 -04002434 if (unconf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 status = nfserr_jukebox;
Jeff Layton2216d442012-11-12 15:00:57 -05002437 new = create_client(clname, rqstp, &clverifier);
J. Bruce Fields8f930712012-05-18 22:06:41 -04002438 if (new == NULL)
2439 goto out;
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002440 if (conf && same_verf(&conf->cl_verifier, &clverifier))
J. Bruce Fields63db4632012-05-18 21:54:19 -04002441 /* case 1: probable callback update */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 copy_clid(new, conf);
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002443 else /* case 4 (new client) or cases 2, 3 (client reboot): */
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002444 gen_clid(new, nn);
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002445 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002446 gen_callback(new, setclid, rqstp);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002447 add_to_unconfirmed(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2449 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2450 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2451 status = nfs_ok;
2452out:
2453 nfs4_unlock_state();
2454 return status;
2455}
2456
2457
Al Virob37ad282006-10-19 23:28:59 -07002458__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002459nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2460 struct nfsd4_compound_state *cstate,
2461 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462{
NeilBrown21ab45a2005-06-23 22:04:14 -07002463 struct nfs4_client *conf, *unconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2465 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07002466 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03002467 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002469 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470 return nfserr_stale_clientid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471 nfs4_lock_state();
NeilBrown21ab45a2005-06-23 22:04:14 -07002472
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002473 conf = find_confirmed_client(clid, false, nn);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002474 unconf = find_unconfirmed_client(clid, false, nn);
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002475 /*
J. Bruce Fields8695b902012-05-19 10:05:58 -04002476 * We try hard to give out unique clientid's, so if we get an
2477 * attempt to confirm the same clientid with a different cred,
2478 * there's a bug somewhere. Let's charitably assume it's our
2479 * bug.
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002480 */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002481 status = nfserr_serverfault;
2482 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2483 goto out;
2484 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2485 goto out;
J. Bruce Fields63db4632012-05-18 21:54:19 -04002486 /* cases below refer to rfc 3530 section 14.2.34: */
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002487 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2488 if (conf && !unconf) /* case 2: probable retransmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489 status = nfs_ok;
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002490 else /* case 4: client hasn't noticed we rebooted yet? */
2491 status = nfserr_stale_clientid;
2492 goto out;
2493 }
2494 status = nfs_ok;
2495 if (conf) { /* case 1: callback update */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002496 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2497 nfsd4_probe_callback(conf);
2498 expire_client(unconf);
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002499 } else { /* case 3: normal case; new or rebooted client */
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002500 conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002501 if (conf) {
2502 status = mark_client_expired(conf);
2503 if (status)
2504 goto out;
J. Bruce Fields8695b902012-05-19 10:05:58 -04002505 expire_client(conf);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002506 }
J. Bruce Fields8695b902012-05-19 10:05:58 -04002507 move_to_confirmed(unconf);
J. Bruce Fieldsf3d03b92012-05-23 11:38:38 -04002508 nfsd4_probe_callback(unconf);
NeilBrown08e89872005-06-23 22:04:11 -07002509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511 nfs4_unlock_state();
2512 return status;
2513}
2514
J. Bruce Fields32513b42011-10-13 16:00:16 -04002515static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516{
J. Bruce Fields32513b42011-10-13 16:00:16 -04002517 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2518}
2519
2520/* OPEN Share state helper functions */
2521static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2522{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 unsigned int hashval = file_hashval(ino);
2524
J. Bruce Fields32513b42011-10-13 16:00:16 -04002525 atomic_set(&fp->fi_ref, 1);
J. Bruce Fields32513b42011-10-13 16:00:16 -04002526 INIT_LIST_HEAD(&fp->fi_stateids);
2527 INIT_LIST_HEAD(&fp->fi_delegations);
2528 fp->fi_inode = igrab(ino);
2529 fp->fi_had_conflict = false;
2530 fp->fi_lease = NULL;
2531 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2532 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2533 spin_lock(&recall_lock);
Jeff Layton89876f82013-04-02 09:01:59 -04002534 hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
J. Bruce Fields32513b42011-10-13 16:00:16 -04002535 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536}
2537
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04002538void
NeilBrowne60d4392005-06-23 22:03:01 -07002539nfsd4_free_slabs(void)
2540{
Christoph Hellwigabf11352014-05-21 07:43:03 -07002541 kmem_cache_destroy(openowner_slab);
2542 kmem_cache_destroy(lockowner_slab);
2543 kmem_cache_destroy(file_slab);
2544 kmem_cache_destroy(stateid_slab);
2545 kmem_cache_destroy(deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002546}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547
Bryan Schumaker72083392011-11-01 15:24:59 -04002548int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549nfsd4_init_slabs(void)
2550{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002551 openowner_slab = kmem_cache_create("nfsd4_openowners",
2552 sizeof(struct nfs4_openowner), 0, 0, NULL);
2553 if (openowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002554 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002555 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
Yanchuan Nian3c407942012-10-24 14:44:19 +08002556 sizeof(struct nfs4_lockowner), 0, 0, NULL);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002557 if (lockowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002558 goto out_free_openowner_slab;
NeilBrowne60d4392005-06-23 22:03:01 -07002559 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09002560 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002561 if (file_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002562 goto out_free_lockowner_slab;
NeilBrown5ac049a2005-06-23 22:03:03 -07002563 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002564 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07002565 if (stateid_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002566 goto out_free_file_slab;
NeilBrown5b2d21c2005-06-23 22:03:04 -07002567 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09002568 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002569 if (deleg_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07002570 goto out_free_stateid_slab;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 return 0;
Christoph Hellwigabf11352014-05-21 07:43:03 -07002572
2573out_free_stateid_slab:
2574 kmem_cache_destroy(stateid_slab);
2575out_free_file_slab:
2576 kmem_cache_destroy(file_slab);
2577out_free_lockowner_slab:
2578 kmem_cache_destroy(lockowner_slab);
2579out_free_openowner_slab:
2580 kmem_cache_destroy(openowner_slab);
2581out:
NeilBrowne60d4392005-06-23 22:03:01 -07002582 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2583 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002584}
2585
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002586static void init_nfs4_replay(struct nfs4_replay *rp)
2587{
2588 rp->rp_status = nfserr_serverfault;
2589 rp->rp_buflen = 0;
2590 rp->rp_buf = rp->rp_ibuf;
2591}
2592
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002593static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594{
2595 struct nfs4_stateowner *sop;
2596
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002597 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002598 if (!sop)
2599 return NULL;
2600
2601 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2602 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002603 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002604 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002606 sop->so_owner.len = owner->len;
2607
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002608 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002609 sop->so_client = clp;
2610 init_nfs4_replay(&sop->so_replay);
2611 return sop;
2612}
2613
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002614static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002615{
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002616 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2617
2618 list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002619 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620}
2621
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002622static struct nfs4_openowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002624 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002626 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2627 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002629 oo->oo_owner.so_is_open_owner = 1;
2630 oo->oo_owner.so_seqid = open->op_seqid;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04002631 oo->oo_flags = NFS4_OO_NEW;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002632 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04002633 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002634 INIT_LIST_HEAD(&oo->oo_close_lru);
2635 hash_openowner(oo, clp, strhashval);
2636 return oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637}
2638
J. Bruce Fields996e0932011-10-17 11:14:48 -04002639static 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 -04002640 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641
J. Bruce Fields3abdb602013-02-03 12:23:01 -05002642 stp->st_stid.sc_type = NFS4_OPEN_STID;
NeilBrownea1da632005-06-23 22:04:17 -07002643 INIT_LIST_HEAD(&stp->st_lockowners);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002644 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
NeilBrown8beefa22005-06-23 22:03:08 -07002645 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002646 stp->st_stateowner = &oo->oo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07002647 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648 stp->st_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649 stp->st_access_bmap = 0;
2650 stp->st_deny_bmap = 0;
Jeff Layton82c5ff12012-05-11 09:45:13 -04002651 set_access(open->op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04002652 set_deny(open->op_share_deny, stp);
NeilBrown4c4cd222005-07-07 17:59:27 -07002653 stp->st_openstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654}
2655
2656static void
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002657move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658{
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002659 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2660
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002661 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03002663 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002664 oo->oo_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665}
2666
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002668same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2669 clientid_t *clid)
2670{
2671 return (sop->so_owner.len == owner->len) &&
2672 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2673 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674}
2675
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002676static struct nfs4_openowner *
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002677find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
2678 bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679{
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002680 struct nfs4_stateowner *so;
2681 struct nfs4_openowner *oo;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002682 struct nfs4_client *clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002684 list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002685 if (!so->so_is_open_owner)
2686 continue;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002687 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2688 oo = openowner(so);
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002689 clp = oo->oo_owner.so_client;
2690 if ((bool)clp->cl_minorversion != sessions)
2691 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002692 renew_client(oo->oo_owner.so_client);
2693 return oo;
2694 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695 }
2696 return NULL;
2697}
2698
2699/* search file_hashtbl[] for file */
2700static struct nfs4_file *
2701find_file(struct inode *ino)
2702{
2703 unsigned int hashval = file_hashval(ino);
2704 struct nfs4_file *fp;
2705
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002706 spin_lock(&recall_lock);
Jeff Layton89876f82013-04-02 09:01:59 -04002707 hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
NeilBrown13cd2182005-06-23 22:03:10 -07002708 if (fp->fi_inode == ino) {
2709 get_nfs4_file(fp);
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002710 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07002712 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713 }
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002714 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 return NULL;
2716}
2717
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04002718/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 * Called to check deny when READ with all zero stateid or
2720 * WRITE with all zero or all one stateid
2721 */
Al Virob37ad282006-10-19 23:28:59 -07002722static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2724{
2725 struct inode *ino = current_fh->fh_dentry->d_inode;
2726 struct nfs4_file *fp;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002727 struct nfs4_ol_stateid *stp;
Al Virob37ad282006-10-19 23:28:59 -07002728 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07002731 if (!fp)
2732 return nfs_ok;
NeilBrownb7009492005-07-07 17:59:23 -07002733 ret = nfserr_locked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 /* Search for conflicting share reservations */
NeilBrown13cd2182005-06-23 22:03:10 -07002735 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
Jeff Laytonce0fc432012-05-11 09:45:14 -04002736 if (test_deny(deny_type, stp) ||
2737 test_deny(NFS4_SHARE_DENY_BOTH, stp))
NeilBrown13cd2182005-06-23 22:03:10 -07002738 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739 }
NeilBrown13cd2182005-06-23 22:03:10 -07002740 ret = nfs_ok;
2741out:
2742 put_nfs4_file(fp);
2743 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744}
2745
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002746static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747{
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04002748 struct nfs4_client *clp = dp->dl_stid.sc_client;
2749 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2750
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751 /* We're assuming the state code never drops its reference
2752 * without first removing the lease. Since we're in this lease
2753 * callback (and since the lease code is serialized by the kernel
2754 * lock) we know the server hasn't removed the lease yet, we know
2755 * it's safe to take a reference: */
2756 atomic_inc(&dp->dl_count);
2757
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04002758 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002759
Jeff Layton1c8c6012013-06-21 08:58:15 -04002760 /* Only place dl_time is set; protected by i_lock: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761 dp->dl_time = get_seconds();
2762
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002763 nfsd4_cb_recall(dp);
2764}
2765
Jeff Layton1c8c6012013-06-21 08:58:15 -04002766/* Called from break_lease() with i_lock held. */
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002767static void nfsd_break_deleg_cb(struct file_lock *fl)
2768{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002769 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
2770 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002771
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04002772 if (!fp) {
2773 WARN(1, "(%p)->fl_owner NULL\n", fl);
2774 return;
2775 }
2776 if (fp->fi_had_conflict) {
2777 WARN(1, "duplicate break on %p\n", fp);
2778 return;
2779 }
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002780 /*
2781 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002782 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002783 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002784 */
2785 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002786
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002787 spin_lock(&recall_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002788 fp->fi_had_conflict = true;
2789 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
2790 nfsd_break_one_deleg(dp);
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002791 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792}
2793
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794static
2795int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2796{
2797 if (arg & F_UNLCK)
2798 return lease_modify(onlist, arg);
2799 else
2800 return -EAGAIN;
2801}
2802
Alexey Dobriyan7b021962009-09-21 17:01:12 -07002803static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04002804 .lm_break = nfsd_break_deleg_cb,
2805 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806};
2807
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04002808static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
2809{
2810 if (nfsd4_has_session(cstate))
2811 return nfs_ok;
2812 if (seqid == so->so_seqid - 1)
2813 return nfserr_replay_me;
2814 if (seqid == so->so_seqid)
2815 return nfs_ok;
2816 return nfserr_bad_seqid;
2817}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818
Al Virob37ad282006-10-19 23:28:59 -07002819__be32
Andy Adamson66689582009-04-03 08:28:45 +03002820nfsd4_process_open1(struct nfsd4_compound_state *cstate,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03002821 struct nfsd4_open *open, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002822{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002823 clientid_t *clientid = &open->op_clientid;
2824 struct nfs4_client *clp = NULL;
2825 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002826 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002827 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002829 if (STALE_CLIENTID(&open->op_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002830 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04002831 /*
2832 * In case we need it later, after we've already created the
2833 * file and don't want to risk a further failure:
2834 */
2835 open->op_file = nfsd4_alloc_file();
2836 if (open->op_file == NULL)
2837 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002839 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03002840 oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002841 open->op_openowner = oo;
2842 if (!oo) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002843 clp = find_confirmed_client(clientid, cstate->minorversion,
2844 nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845 if (clp == NULL)
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002846 return nfserr_expired;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002847 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002849 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002850 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002851 clp = oo->oo_owner.so_client;
2852 release_openowner(oo);
2853 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002854 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002855 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002856 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
2857 if (status)
2858 return status;
2859 clp = oo->oo_owner.so_client;
2860 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002861new_owner:
2862 oo = alloc_init_open_stateowner(strhashval, clp, open);
2863 if (oo == NULL)
2864 return nfserr_jukebox;
2865 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002866alloc_stateid:
2867 open->op_stp = nfs4_alloc_stateid(clp);
2868 if (!open->op_stp)
2869 return nfserr_jukebox;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002870 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871}
2872
Al Virob37ad282006-10-19 23:28:59 -07002873static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07002874nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
2875{
2876 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
2877 return nfserr_openmode;
2878 else
2879 return nfs_ok;
2880}
2881
Daniel Mackc47d8322011-05-16 16:38:14 +02002882static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04002883{
J. Bruce Fields24a01112010-05-18 20:01:35 -04002884 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
2885}
2886
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002887static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002888{
2889 struct nfs4_stid *ret;
2890
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002891 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002892 if (!ret)
2893 return NULL;
2894 return delegstateid(ret);
2895}
2896
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002897static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
2898{
2899 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
2900 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
2901}
2902
Al Virob37ad282006-10-19 23:28:59 -07002903static __be32
J. Bruce Fields41d22662013-03-21 15:49:47 -04002904nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07002905 struct nfs4_delegation **dp)
2906{
2907 int flags;
Al Virob37ad282006-10-19 23:28:59 -07002908 __be32 status = nfserr_bad_stateid;
NeilBrown567d9822005-06-23 22:02:53 -07002909
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002910 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
NeilBrown567d9822005-06-23 22:02:53 -07002911 if (*dp == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07002912 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04002913 flags = share_access_to_flags(open->op_share_access);
NeilBrown567d9822005-06-23 22:02:53 -07002914 status = nfs4_check_delegmode(*dp, flags);
2915 if (status)
2916 *dp = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002917out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002918 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07002919 return nfs_ok;
2920 if (status)
2921 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002922 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002923 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07002924}
2925
Al Virob37ad282006-10-19 23:28:59 -07002926static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002927nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002929 struct nfs4_ol_stateid *local;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002930 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931
NeilBrown8beefa22005-06-23 22:03:08 -07002932 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933 /* ignore lock owners */
2934 if (local->st_stateowner->so_is_open_owner == 0)
2935 continue;
2936 /* remember if we have seen this open owner */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002937 if (local->st_stateowner == &oo->oo_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938 *stpp = local;
2939 /* check for conflicting share reservations */
2940 if (!test_share(local, open))
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002941 return nfserr_share_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 }
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002943 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944}
2945
J. Bruce Fields21fb4012010-07-28 12:21:23 -04002946static inline int nfs4_access_to_access(u32 nfs4_access)
2947{
2948 int flags = 0;
2949
2950 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
2951 flags |= NFSD_MAY_READ;
2952 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
2953 flags |= NFSD_MAY_WRITE;
2954 return flags;
2955}
2956
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002957static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
2958 struct svc_fh *cur_fh, struct nfsd4_open *open)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002959{
2960 __be32 status;
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002961 int oflag = nfs4_access_to_omode(open->op_share_access);
2962 int access = nfs4_access_to_access(open->op_share_access);
2963
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002964 if (!fp->fi_fds[oflag]) {
2965 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
2966 &fp->fi_fds[oflag]);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002967 if (status)
2968 return status;
2969 }
2970 nfs4_file_get_access(fp, oflag);
2971
2972 return nfs_ok;
2973}
2974
Al Virob37ad282006-10-19 23:28:59 -07002975static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002976nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
2977 struct nfsd4_open *open)
2978{
2979 struct iattr iattr = {
2980 .ia_valid = ATTR_SIZE,
2981 .ia_size = 0,
2982 };
2983 if (!open->op_truncate)
2984 return 0;
2985 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08002986 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
2988}
2989
Al Virob37ad282006-10-19 23:28:59 -07002990static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002991nfs4_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 -07002992{
J. Bruce Fieldsb6d2f1c2011-10-10 17:44:19 -04002993 u32 op_share_access = open->op_share_access;
J. Bruce Fields7d947842010-08-20 18:09:31 -04002994 bool new_access;
Al Virob37ad282006-10-19 23:28:59 -07002995 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996
Jeff Layton82c5ff12012-05-11 09:45:13 -04002997 new_access = !test_access(op_share_access, stp);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002998 if (new_access) {
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002999 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003000 if (status)
3001 return status;
J. Bruce Fields6c26d082006-01-18 17:43:38 -08003002 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003 status = nfsd4_truncate(rqstp, cur_fh, open);
3004 if (status) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003005 if (new_access) {
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003006 int oflag = nfs4_access_to_omode(op_share_access);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003007 nfs4_file_put_access(fp, oflag);
3008 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003009 return status;
3010 }
3011 /* remember the open */
Jeff Layton82c5ff12012-05-11 09:45:13 -04003012 set_access(op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04003013 set_deny(open->op_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003014
3015 return nfs_ok;
3016}
3017
3018
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019static void
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003020nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021{
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003022 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003023}
3024
J. Bruce Fields14a24e92010-12-10 19:02:49 -05003025/* Should we give out recallable state?: */
3026static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3027{
3028 if (clp->cl_cb_state == NFSD4_CB_UP)
3029 return true;
3030 /*
3031 * In the sessions case, since we don't have to establish a
3032 * separate connection for callbacks, we assume it's OK
3033 * until we hear otherwise:
3034 */
3035 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3036}
3037
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003038static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
3039{
3040 struct file_lock *fl;
3041
3042 fl = locks_alloc_lock();
3043 if (!fl)
3044 return NULL;
3045 locks_init_lock(fl);
3046 fl->fl_lmops = &nfsd_lease_mng_ops;
J. Bruce Fields617588d2011-07-01 15:18:34 -04003047 fl->fl_flags = FL_DELEG;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003048 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3049 fl->fl_end = OFFSET_MAX;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003050 fl->fl_owner = (fl_owner_t)(dp->dl_file);
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003051 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003052 return fl;
3053}
3054
J. Bruce Fields99c41512013-05-21 16:21:25 -04003055static int nfs4_setlease(struct nfs4_delegation *dp)
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003056{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003057 struct nfs4_file *fp = dp->dl_file;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003058 struct file_lock *fl;
3059 int status;
3060
J. Bruce Fields99c41512013-05-21 16:21:25 -04003061 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003062 if (!fl)
3063 return -ENOMEM;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003064 fl->fl_file = find_readable_file(fp);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003065 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
J. Bruce Fieldse8730882012-01-23 13:52:01 -05003066 if (status)
3067 goto out_free;
3068 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003069 fp->fi_lease = fl;
Al Virocb0942b2012-08-27 14:48:26 -04003070 fp->fi_deleg_file = get_file(fl->fl_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003071 atomic_set(&fp->fi_delegees, 1);
3072 list_add(&dp->dl_perfile, &fp->fi_delegations);
3073 return 0;
J. Bruce Fieldse8730882012-01-23 13:52:01 -05003074out_free:
3075 locks_free_lock(fl);
3076 return status;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003077}
3078
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003079static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003080{
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003081 if (fp->fi_had_conflict)
3082 return -EAGAIN;
3083 get_nfs4_file(fp);
3084 dp->dl_file = fp;
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003085 if (!fp->fi_lease)
3086 return nfs4_setlease(dp);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003087 spin_lock(&recall_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003088 atomic_inc(&fp->fi_delegees);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003089 if (fp->fi_had_conflict) {
3090 spin_unlock(&recall_lock);
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003091 return -EAGAIN;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003092 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003093 list_add(&dp->dl_perfile, &fp->fi_delegations);
3094 spin_unlock(&recall_lock);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -04003095 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003096 return 0;
3097}
3098
Benny Halevy4aa89132012-02-21 14:16:44 -08003099static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
3100{
3101 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3102 if (status == -EAGAIN)
3103 open->op_why_no_deleg = WND4_CONTENTION;
3104 else {
3105 open->op_why_no_deleg = WND4_RESOURCE;
3106 switch (open->op_deleg_want) {
3107 case NFS4_SHARE_WANT_READ_DELEG:
3108 case NFS4_SHARE_WANT_WRITE_DELEG:
3109 case NFS4_SHARE_WANT_ANY_DELEG:
3110 break;
3111 case NFS4_SHARE_WANT_CANCEL:
3112 open->op_why_no_deleg = WND4_CANCELLED;
3113 break;
3114 case NFS4_SHARE_WANT_NO_DELEG:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003115 WARN_ON_ONCE(1);
Benny Halevy4aa89132012-02-21 14:16:44 -08003116 }
3117 }
3118}
3119
Linus Torvalds1da177e2005-04-16 15:20:36 -07003120/*
3121 * Attempt to hand out a delegation.
J. Bruce Fields99c41512013-05-21 16:21:25 -04003122 *
3123 * Note we don't support write delegations, and won't until the vfs has
3124 * proper support for them.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003125 */
3126static void
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003127nfs4_open_delegation(struct net *net, struct svc_fh *fh,
3128 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129{
3130 struct nfs4_delegation *dp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003131 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
J. Bruce Fields14a24e92010-12-10 19:02:49 -05003132 int cb_up;
J. Bruce Fields99c41512013-05-21 16:21:25 -04003133 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003135 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
NeilBrown7b190fe2005-06-23 22:03:23 -07003136 open->op_recall = 0;
3137 switch (open->op_claim_type) {
3138 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05003139 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07003140 open->op_recall = 1;
J. Bruce Fields99c41512013-05-21 16:21:25 -04003141 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
3142 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003143 break;
3144 case NFS4_OPEN_CLAIM_NULL:
Ming Chened47b062014-01-09 21:26:10 +00003145 case NFS4_OPEN_CLAIM_FH:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003146 /*
3147 * Let's not give out any delegations till everyone's
3148 * had the chance to reclaim theirs....
3149 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003150 if (locks_in_grace(net))
J. Bruce Fields99c41512013-05-21 16:21:25 -04003151 goto out_no_deleg;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003152 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields99c41512013-05-21 16:21:25 -04003153 goto out_no_deleg;
Steve Dickson9a0590a2013-05-15 14:51:49 -04003154 /*
3155 * Also, if the file was opened for write or
3156 * create, there's a good chance the client's
3157 * about to write to it, resulting in an
3158 * immediate recall (since we don't support
3159 * write delegations):
3160 */
NeilBrown7b190fe2005-06-23 22:03:23 -07003161 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields99c41512013-05-21 16:21:25 -04003162 goto out_no_deleg;
3163 if (open->op_create == NFS4_OPEN_CREATE)
3164 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003165 break;
3166 default:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003167 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07003168 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04003169 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003170 if (dp == NULL)
3171 goto out_no_deleg;
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003172 status = nfs4_set_delegation(dp, stp->st_file);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003173 if (status)
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003174 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003175
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003176 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003177
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003178 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003179 STATEID_VAL(&dp->dl_stid.sc_stateid));
J. Bruce Fields99c41512013-05-21 16:21:25 -04003180 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003181 return;
3182out_free:
J. Bruce Fieldscbf7a752014-03-03 12:19:18 -05003183 destroy_delegation(dp);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05003184out_no_deleg:
J. Bruce Fields99c41512013-05-21 16:21:25 -04003185 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
3186 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04003187 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
J. Bruce Fields99c41512013-05-21 16:21:25 -04003188 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04003189 open->op_recall = 1;
3190 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04003191
3192 /* 4.1 client asking for a delegation? */
3193 if (open->op_deleg_want)
3194 nfsd4_open_deleg_none_ext(open, status);
3195 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196}
3197
Benny Halevye27f49c2012-02-21 14:16:54 -08003198static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
3199 struct nfs4_delegation *dp)
3200{
3201 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
3202 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3203 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3204 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
3205 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
3206 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3207 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3208 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
3209 }
3210 /* Otherwise the client must be confused wanting a delegation
3211 * it already has, therefore we don't return
3212 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3213 */
3214}
3215
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216/*
3217 * called with nfs4_lock_state() held.
3218 */
Al Virob37ad282006-10-19 23:28:59 -07003219__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003220nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
3221{
Andy Adamson66689582009-04-03 08:28:45 +03003222 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003223 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 struct nfs4_file *fp = NULL;
3225 struct inode *ino = current_fh->fh_dentry->d_inode;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003226 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07003227 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003228 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230 /*
3231 * Lookup file; if found, lookup stateid and check open request,
3232 * and check for delegations in the process of being recalled.
3233 * If not found, create the nfs4_file struct
3234 */
3235 fp = find_file(ino);
3236 if (fp) {
3237 if ((status = nfs4_check_open(fp, open, &stp)))
3238 goto out;
J. Bruce Fields41d22662013-03-21 15:49:47 -04003239 status = nfs4_check_deleg(cl, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07003240 if (status)
3241 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242 } else {
NeilBrownc44c5ee2005-06-23 22:02:54 -07003243 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003244 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07003245 goto out;
J. Bruce Fields3e772462011-08-10 19:07:33 -04003246 status = nfserr_jukebox;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003247 fp = open->op_file;
3248 open->op_file = NULL;
3249 nfsd4_init_file(fp, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 }
3251
3252 /*
3253 * OPEN the file, or upgrade an existing OPEN.
3254 * If truncate fails, the OPEN fails.
3255 */
3256 if (stp) {
3257 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003258 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003259 if (status)
3260 goto out;
3261 } else {
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003262 status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
NeilBrown567d9822005-06-23 22:02:53 -07003263 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264 goto out;
J. Bruce Fields4af82502012-06-07 17:30:45 -04003265 status = nfsd4_truncate(rqstp, current_fh, open);
3266 if (status)
3267 goto out;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003268 stp = open->op_stp;
3269 open->op_stp = NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04003270 init_open_stateid(stp, fp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003271 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003272 update_stateid(&stp->st_stid.sc_stateid);
3273 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274
Benny Halevyd24433c2012-02-16 20:57:17 +02003275 if (nfsd4_has_session(&resp->cstate)) {
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003276 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Andy Adamson66689582009-04-03 08:28:45 +03003277
Benny Halevyd24433c2012-02-16 20:57:17 +02003278 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3279 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3280 open->op_why_no_deleg = WND4_NOT_WANTED;
3281 goto nodeleg;
3282 }
3283 }
3284
Linus Torvalds1da177e2005-04-16 15:20:36 -07003285 /*
3286 * Attempt to hand out a delegation. No error return, because the
3287 * OPEN succeeds even if we fail.
3288 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003289 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003290nodeleg:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003291 status = nfs_ok;
3292
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003293 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003294 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003295out:
Benny Halevyd24433c2012-02-16 20:57:17 +02003296 /* 4.1 client trying to upgrade/downgrade delegation? */
3297 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
Benny Halevye27f49c2012-02-21 14:16:54 -08003298 open->op_deleg_want)
3299 nfsd4_deleg_xgrade_none_ext(open, dp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003300
NeilBrown13cd2182005-06-23 22:03:10 -07003301 if (fp)
3302 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07003303 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003304 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003305 /*
3306 * To finish the open response, we just need to set the rflags.
3307 */
3308 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003309 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03003310 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3312
3313 return status;
3314}
3315
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003316void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3317{
3318 if (open->op_openowner) {
3319 struct nfs4_openowner *oo = open->op_openowner;
3320
3321 if (!list_empty(&oo->oo_owner.so_stateids))
3322 list_del_init(&oo->oo_close_lru);
3323 if (oo->oo_flags & NFS4_OO_NEW) {
3324 if (status) {
3325 release_openowner(oo);
3326 open->op_openowner = NULL;
3327 } else
3328 oo->oo_flags &= ~NFS4_OO_NEW;
3329 }
3330 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04003331 if (open->op_file)
3332 nfsd4_free_file(open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003333 if (open->op_stp)
J. Bruce Fieldsef798592012-08-29 10:32:54 -07003334 free_generic_stateid(open->op_stp);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003335}
3336
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05003337static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp)
3338{
3339 struct nfs4_client *found;
3340
3341 if (STALE_CLIENTID(clid, nn))
3342 return nfserr_stale_clientid;
3343 found = find_confirmed_client(clid, session, nn);
3344 if (clp)
3345 *clp = found;
3346 return found ? nfs_ok : nfserr_expired;
3347}
3348
Al Virob37ad282006-10-19 23:28:59 -07003349__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003350nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3351 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003352{
3353 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07003354 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03003355 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003356
3357 nfs4_lock_state();
3358 dprintk("process_renew(%08x/%08x): starting\n",
3359 clid->cl_boot, clid->cl_id);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05003360 status = lookup_clientid(clid, cstate->minorversion, nn, &clp);
3361 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07003364 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04003365 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 goto out;
3367 status = nfs_ok;
3368out:
3369 nfs4_unlock_state();
3370 return status;
3371}
3372
NeilBrowna76b4312005-06-23 22:04:01 -07003373static void
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003374nfsd4_end_grace(struct nfsd_net *nn)
NeilBrowna76b4312005-06-23 22:04:01 -07003375{
Jeff Layton33dcc482012-04-10 11:08:48 -04003376 /* do nothing if grace period already ended */
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003377 if (nn->grace_ended)
Jeff Layton33dcc482012-04-10 11:08:48 -04003378 return;
3379
NeilBrowna76b4312005-06-23 22:04:01 -07003380 dprintk("NFSD: end of grace period\n");
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003381 nn->grace_ended = true;
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003382 nfsd4_record_grace_done(nn, nn->boot_time);
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003383 locks_end_grace(&nn->nfsd4_manager);
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05003384 /*
3385 * Now that every NFSv4 client has had the chance to recover and
3386 * to see the (possibly new, possibly shorter) lease time, we
3387 * can safely set the next grace time to the current lease time:
3388 */
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03003389 nn->nfsd4_grace = nn->nfsd4_lease;
NeilBrowna76b4312005-06-23 22:04:01 -07003390}
3391
NeilBrownfd39ca92005-06-23 22:04:03 -07003392static time_t
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003393nfs4_laundromat(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394{
3395 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003396 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397 struct nfs4_delegation *dp;
3398 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03003399 time_t cutoff = get_seconds() - nn->nfsd4_lease;
3400 time_t t, clientid_val = nn->nfsd4_lease;
3401 time_t u, test_val = nn->nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003402
3403 nfs4_lock_state();
3404
3405 dprintk("NFSD: laundromat service - starting\n");
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03003406 nfsd4_end_grace(nn);
Benny Halevy36acb662010-05-12 00:13:04 +03003407 INIT_LIST_HEAD(&reaplist);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03003408 spin_lock(&nn->client_lock);
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03003409 list_for_each_safe(pos, next, &nn->client_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410 clp = list_entry(pos, struct nfs4_client, cl_lru);
3411 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3412 t = clp->cl_time - cutoff;
3413 if (clientid_val > t)
3414 clientid_val = t;
3415 break;
3416 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003417 if (mark_client_expired_locked(clp)) {
Benny Halevyd7682982010-05-12 00:13:54 +03003418 dprintk("NFSD: client in use (clientid %08x)\n",
3419 clp->cl_clientid.cl_id);
3420 continue;
3421 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003422 list_move(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03003423 }
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03003424 spin_unlock(&nn->client_lock);
Benny Halevy36acb662010-05-12 00:13:04 +03003425 list_for_each_safe(pos, next, &reaplist) {
3426 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003427 dprintk("NFSD: purging unused client (clientid %08x)\n",
3428 clp->cl_clientid.cl_id);
3429 expire_client(clp);
3430 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431 spin_lock(&recall_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04003432 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003433 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Stanislav Kinsbursky4e37a7c22012-11-26 15:22:03 +03003434 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
3435 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3437 u = dp->dl_time - cutoff;
3438 if (test_val > u)
3439 test_val = u;
3440 break;
3441 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442 list_move(&dp->dl_recall_lru, &reaplist);
3443 }
3444 spin_unlock(&recall_lock);
3445 list_for_each_safe(pos, next, &reaplist) {
3446 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003447 revoke_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003448 }
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03003449 test_val = nn->nfsd4_lease;
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003450 list_for_each_safe(pos, next, &nn->close_lru) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003451 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3452 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3453 u = oo->oo_time - cutoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003454 if (test_val > u)
3455 test_val = u;
3456 break;
3457 }
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003458 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003459 }
3460 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
3461 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
3462 nfs4_unlock_state();
3463 return clientid_val;
3464}
3465
Harvey Harrisona254b242008-02-20 12:49:00 -08003466static struct workqueue_struct *laundry_wq;
3467static void laundromat_main(struct work_struct *);
Harvey Harrisona254b242008-02-20 12:49:00 -08003468
3469static void
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003470laundromat_main(struct work_struct *laundry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003471{
3472 time_t t;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003473 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
3474 work);
3475 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
3476 laundromat_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003477
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003478 t = nfs4_laundromat(nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03003480 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003481}
3482
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003483static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07003484{
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003485 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3486 return nfserr_bad_stateid;
3487 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003488}
3489
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003491access_permit_read(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003493 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3494 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3495 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003496}
3497
3498static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003499access_permit_write(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003501 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3502 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003503}
3504
3505static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003506__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507{
Al Virob37ad282006-10-19 23:28:59 -07003508 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509
J. Bruce Fields02921912010-07-29 15:16:59 -04003510 /* For lock stateid's, we test the parent open, not the lock: */
3511 if (stp->st_openstp)
3512 stp = stp->st_openstp;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003513 if ((flags & WR_STATE) && !access_permit_write(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514 goto out;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003515 if ((flags & RD_STATE) && !access_permit_read(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003516 goto out;
3517 status = nfs_ok;
3518out:
3519 return status;
3520}
3521
Al Virob37ad282006-10-19 23:28:59 -07003522static inline __be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003523check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003524{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003525 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 return nfs_ok;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003527 else if (locks_in_grace(net)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003528 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003529 * conflicting state; so we must wait out the grace period. */
3530 return nfserr_grace;
3531 } else if (flags & WR_STATE)
3532 return nfs4_share_conflict(current_fh,
3533 NFS4_SHARE_DENY_WRITE);
3534 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3535 return nfs4_share_conflict(current_fh,
3536 NFS4_SHARE_DENY_READ);
3537}
3538
3539/*
3540 * Allow READ/WRITE during grace period on recovered state only for files
3541 * that are not able to provide mandatory locking.
3542 */
3543static inline int
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003544grace_disallows_io(struct net *net, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545{
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003546 return locks_in_grace(net) && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003547}
3548
J. Bruce Fields81b82962011-08-23 11:03:29 -04003549/* Returns true iff a is later than b: */
3550static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3551{
Jim Rees1a9357f2013-05-17 17:33:00 -04003552 return (s32)(a->si_generation - b->si_generation) > 0;
J. Bruce Fields81b82962011-08-23 11:03:29 -04003553}
3554
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003555static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05003556{
Andy Adamson66689582009-04-03 08:28:45 +03003557 /*
3558 * When sessions are used the stateid generation number is ignored
3559 * when it is zero.
3560 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04003561 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04003562 return nfs_ok;
3563
3564 if (in->si_generation == ref->si_generation)
3565 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03003566
J. Bruce Fields0836f582008-01-26 19:08:12 -05003567 /* If the client sends us a stateid from the future, it's buggy: */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003568 if (stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05003569 return nfserr_bad_stateid;
3570 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04003571 * However, we could see a stateid from the past, even from a
3572 * non-buggy client. For example, if the client sends a lock
3573 * while some IO is outstanding, the lock may bump si_generation
3574 * while the IO is still in flight. The client could avoid that
3575 * situation by waiting for responses on all the IO requests,
3576 * but better performance may result in retrying IO that
3577 * receives an old_stateid error if requests are rarely
3578 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05003579 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003580 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05003581}
3582
Chuck Lever7df302f2012-05-29 13:56:37 -04003583static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04003584{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003585 struct nfs4_stid *s;
3586 struct nfs4_ol_stateid *ols;
3587 __be32 status;
Bryan Schumaker17456802011-07-13 10:50:48 -04003588
Chuck Lever7df302f2012-05-29 13:56:37 -04003589 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3590 return nfserr_bad_stateid;
3591 /* Client debugging aid. */
3592 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
3593 char addr_str[INET6_ADDRSTRLEN];
3594 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
3595 sizeof(addr_str));
3596 pr_warn_ratelimited("NFSD: client %s testing state ID "
3597 "with incorrect client ID\n", addr_str);
3598 return nfserr_bad_stateid;
3599 }
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003600 s = find_stateid(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003601 if (!s)
Chuck Lever7df302f2012-05-29 13:56:37 -04003602 return nfserr_bad_stateid;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04003603 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04003604 if (status)
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003605 return status;
J. Bruce Fields23340032013-04-09 17:42:28 -04003606 switch (s->sc_type) {
3607 case NFS4_DELEG_STID:
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003608 return nfs_ok;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003609 case NFS4_REVOKED_DELEG_STID:
3610 return nfserr_deleg_revoked;
J. Bruce Fields23340032013-04-09 17:42:28 -04003611 case NFS4_OPEN_STID:
3612 case NFS4_LOCK_STID:
3613 ols = openlockstateid(s);
3614 if (ols->st_stateowner->so_is_open_owner
3615 && !(openowner(ols->st_stateowner)->oo_flags
3616 & NFS4_OO_CONFIRMED))
3617 return nfserr_bad_stateid;
3618 return nfs_ok;
3619 default:
3620 printk("unknown stateid type %x\n", s->sc_type);
3621 case NFS4_CLOSED_STID:
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003622 return nfserr_bad_stateid;
J. Bruce Fields23340032013-04-09 17:42:28 -04003623 }
Bryan Schumaker17456802011-07-13 10:50:48 -04003624}
3625
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003626static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,
3627 struct nfs4_stid **s, bool sessions,
3628 struct nfsd_net *nn)
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003629{
3630 struct nfs4_client *cl;
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003631 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003632
3633 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3634 return nfserr_bad_stateid;
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003635 status = lookup_clientid(&stateid->si_opaque.so_clid, sessions,
3636 nn, &cl);
Trond Myklebusta8a7c672014-03-29 14:43:38 -04003637 if (status == nfserr_stale_clientid) {
3638 if (sessions)
3639 return nfserr_bad_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003640 return nfserr_stale_stateid;
Trond Myklebusta8a7c672014-03-29 14:43:38 -04003641 }
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04003642 if (status)
3643 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003644 *s = find_stateid_by_type(cl, stateid, typemask);
3645 if (!*s)
3646 return nfserr_bad_stateid;
3647 return nfs_ok;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003648}
3649
Linus Torvalds1da177e2005-04-16 15:20:36 -07003650/*
3651* Checks for stateid operations
3652*/
Al Virob37ad282006-10-19 23:28:59 -07003653__be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003654nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
Benny Halevydd453df2009-04-03 08:28:41 +03003655 stateid_t *stateid, int flags, struct file **filpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003656{
J. Bruce Fields69064a22011-09-09 11:54:57 -04003657 struct nfs4_stid *s;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003658 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003659 struct nfs4_delegation *dp = NULL;
Benny Halevydd453df2009-04-03 08:28:41 +03003660 struct svc_fh *current_fh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661 struct inode *ino = current_fh->fh_dentry->d_inode;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003662 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Trond Myklebust14bcab12014-04-18 14:44:07 -04003663 struct file *file = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003664 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665
Linus Torvalds1da177e2005-04-16 15:20:36 -07003666 if (filpp)
3667 *filpp = NULL;
3668
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003669 if (grace_disallows_io(net, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670 return nfserr_grace;
3671
3672 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003673 return check_special_stateids(net, current_fh, stateid, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674
Trond Myklebust14bcab12014-04-18 14:44:07 -04003675 nfs4_lock_state();
3676
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003677 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
3678 &s, cstate->minorversion, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003679 if (status)
Trond Myklebust14bcab12014-04-18 14:44:07 -04003680 goto out;
J. Bruce Fields69064a22011-09-09 11:54:57 -04003681 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
3682 if (status)
3683 goto out;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003684 switch (s->sc_type) {
3685 case NFS4_DELEG_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003686 dp = delegstateid(s);
J. Bruce Fieldsdc9bf702009-02-21 11:14:43 -08003687 status = nfs4_check_delegmode(dp, flags);
3688 if (status)
3689 goto out;
Dan Carpenter43b01782010-10-27 23:19:04 +02003690 if (filpp) {
Trond Myklebust14bcab12014-04-18 14:44:07 -04003691 file = dp->dl_file->fi_deleg_file;
3692 if (!file) {
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003693 WARN_ON_ONCE(1);
3694 status = nfserr_serverfault;
3695 goto out;
3696 }
Dan Carpenter43b01782010-10-27 23:19:04 +02003697 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003698 break;
3699 case NFS4_OPEN_STID:
3700 case NFS4_LOCK_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003701 stp = openlockstateid(s);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003702 status = nfs4_check_fh(current_fh, stp);
3703 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003705 if (stp->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003706 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003707 goto out;
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003708 status = nfs4_check_openmode(stp, flags);
3709 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003711 if (filpp) {
3712 if (flags & RD_STATE)
Trond Myklebust14bcab12014-04-18 14:44:07 -04003713 file = find_readable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003714 else
Trond Myklebust14bcab12014-04-18 14:44:07 -04003715 file = find_writeable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003716 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003717 break;
3718 default:
Trond Myklebust14bcab12014-04-18 14:44:07 -04003719 status = nfserr_bad_stateid;
3720 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 }
3722 status = nfs_ok;
Trond Myklebust14bcab12014-04-18 14:44:07 -04003723 if (file)
3724 *filpp = get_file(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725out:
Trond Myklebust14bcab12014-04-18 14:44:07 -04003726 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727 return status;
3728}
3729
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003730static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003731nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003732{
J. Bruce Fieldsa1b8ff42014-05-20 15:55:21 -04003733 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
3734
3735 if (check_for_locks(stp->st_file, lo))
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003736 return nfserr_locks_held;
J. Bruce Fieldsa1b8ff42014-05-20 15:55:21 -04003737 /*
3738 * Currently there's a 1-1 lock stateid<->lockowner
3739 * correspondance, and we have to delete the lockowner when we
3740 * delete the lock stateid:
3741 */
3742 unhash_lockowner(lo);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003743 return nfs_ok;
3744}
3745
3746/*
Bryan Schumaker17456802011-07-13 10:50:48 -04003747 * Test if the stateid is valid
3748 */
3749__be32
3750nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3751 struct nfsd4_test_stateid *test_stateid)
3752{
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003753 struct nfsd4_test_stateid_id *stateid;
3754 struct nfs4_client *cl = cstate->session->se_client;
3755
3756 nfs4_lock_state();
3757 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
Chuck Lever7df302f2012-05-29 13:56:37 -04003758 stateid->ts_id_status =
3759 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003760 nfs4_unlock_state();
3761
Bryan Schumaker17456802011-07-13 10:50:48 -04003762 return nfs_ok;
3763}
3764
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003765__be32
3766nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3767 struct nfsd4_free_stateid *free_stateid)
3768{
3769 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003770 struct nfs4_stid *s;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003771 struct nfs4_delegation *dp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003772 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003773 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003774
3775 nfs4_lock_state();
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003776 s = find_stateid(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003777 if (!s)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003778 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003779 switch (s->sc_type) {
3780 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003781 ret = nfserr_locks_held;
3782 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003783 case NFS4_OPEN_STID:
3784 case NFS4_LOCK_STID:
3785 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
3786 if (ret)
3787 goto out;
3788 if (s->sc_type == NFS4_LOCK_STID)
3789 ret = nfsd4_free_lock_stateid(openlockstateid(s));
3790 else
3791 ret = nfserr_locks_held;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003792 break;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003793 case NFS4_REVOKED_DELEG_STID:
3794 dp = delegstateid(s);
3795 destroy_revoked_delegation(dp);
3796 ret = nfs_ok;
3797 break;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003798 default:
3799 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003800 }
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003801out:
3802 nfs4_unlock_state();
3803 return ret;
3804}
3805
NeilBrown4c4cd222005-07-07 17:59:27 -07003806static inline int
3807setlkflg (int type)
3808{
3809 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
3810 RD_STATE : WR_STATE;
3811}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003813static __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 -04003814{
3815 struct svc_fh *current_fh = &cstate->current_fh;
3816 struct nfs4_stateowner *sop = stp->st_stateowner;
3817 __be32 status;
3818
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003819 status = nfsd4_check_seqid(cstate, sop, seqid);
3820 if (status)
3821 return status;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003822 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
3823 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003824 /*
3825 * "Closed" stateid's exist *only* to return
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04003826 * nfserr_replay_me from the previous step, and
3827 * revoked delegations are kept only for free_stateid.
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003828 */
3829 return nfserr_bad_stateid;
3830 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
3831 if (status)
3832 return status;
3833 return nfs4_check_fh(current_fh, stp);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003834}
3835
Linus Torvalds1da177e2005-04-16 15:20:36 -07003836/*
3837 * Checks for sequence id mutating operations.
3838 */
Al Virob37ad282006-10-19 23:28:59 -07003839static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03003840nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003841 stateid_t *stateid, char typemask,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003842 struct nfs4_ol_stateid **stpp,
3843 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003844{
J. Bruce Fields0836f582008-01-26 19:08:12 -05003845 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003846 struct nfs4_stid *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003847
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003848 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
3849 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07003850
Linus Torvalds1da177e2005-04-16 15:20:36 -07003851 *stpp = NULL;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003852 status = nfsd4_lookup_stateid(stateid, typemask, &s,
3853 cstate->minorversion, nn);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003854 if (status)
3855 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003856 *stpp = openlockstateid(s);
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04003857 if (!nfsd4_has_session(cstate))
3858 cstate->replay_owner = (*stpp)->st_stateowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003859
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003860 return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
3861}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05003862
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003863static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
3864 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003865{
3866 __be32 status;
3867 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003869 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003870 NFS4_OPEN_STID, stpp, nn);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003871 if (status)
3872 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003873 oo = openowner((*stpp)->st_stateowner);
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003874 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown3a4f98b2005-07-07 17:59:26 -07003875 return nfserr_bad_stateid;
NeilBrown3a4f98b2005-07-07 17:59:26 -07003876 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003877}
3878
Al Virob37ad282006-10-19 23:28:59 -07003879__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003880nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003881 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003882{
Al Virob37ad282006-10-19 23:28:59 -07003883 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003884 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003885 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003886 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887
Al Viroa6a9f182013-09-16 10:57:01 -04003888 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3889 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003890
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003891 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07003892 if (status)
3893 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003894
3895 nfs4_lock_state();
3896
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003897 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003898 oc->oc_seqid, &oc->oc_req_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003899 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003900 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003901 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003902 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003903 status = nfserr_bad_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003904 if (oo->oo_flags & NFS4_OO_CONFIRMED)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003905 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003906 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003907 update_stateid(&stp->st_stid.sc_stateid);
3908 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003909 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003910 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07003911
Jeff Layton2a4317c2012-03-21 16:42:43 -04003912 nfsd4_client_record_create(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003913 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003914out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003915 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003916 if (!cstate->replay_owner)
3917 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918 return status;
3919}
3920
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003921static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003922{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003923 if (!test_access(access, stp))
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003924 return;
3925 nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
Jeff Layton82c5ff12012-05-11 09:45:13 -04003926 clear_access(access, stp);
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003927}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003928
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003929static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
3930{
3931 switch (to_access) {
3932 case NFS4_SHARE_ACCESS_READ:
3933 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
3934 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3935 break;
3936 case NFS4_SHARE_ACCESS_WRITE:
3937 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
3938 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3939 break;
3940 case NFS4_SHARE_ACCESS_BOTH:
3941 break;
3942 default:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05003943 WARN_ON_ONCE(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944 }
3945}
3946
3947static void
Jeff Laytonce0fc432012-05-11 09:45:14 -04003948reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003949{
3950 int i;
3951 for (i = 0; i < 4; i++) {
3952 if ((i & deny) != i)
Jeff Laytonce0fc432012-05-11 09:45:14 -04003953 clear_deny(i, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954 }
3955}
3956
Al Virob37ad282006-10-19 23:28:59 -07003957__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003958nfsd4_open_downgrade(struct svc_rqst *rqstp,
3959 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003960 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003961{
Al Virob37ad282006-10-19 23:28:59 -07003962 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003963 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003964 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965
Al Viroa6a9f182013-09-16 10:57:01 -04003966 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
3967 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003968
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04003969 /* We don't yet support WANT bits: */
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02003970 if (od->od_deleg_want)
3971 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
3972 od->od_deleg_want);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003973
3974 nfs4_lock_state();
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003975 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003976 &od->od_stateid, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003977 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003978 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003979 status = nfserr_inval;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003980 if (!test_access(od->od_share_access, stp)) {
3981 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003982 stp->st_access_bmap, od->od_share_access);
3983 goto out;
3984 }
Jeff Laytonce0fc432012-05-11 09:45:14 -04003985 if (!test_deny(od->od_share_deny, stp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3987 stp->st_deny_bmap, od->od_share_deny);
3988 goto out;
3989 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003990 nfs4_stateid_downgrade(stp, od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003991
Jeff Laytonce0fc432012-05-11 09:45:14 -04003992 reset_union_bmap_deny(od->od_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003993
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003994 update_stateid(&stp->st_stid.sc_stateid);
3995 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003996 status = nfs_ok;
3997out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003998 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003999 if (!cstate->replay_owner)
4000 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004001 return status;
4002}
4003
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004004static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4005{
4006 unhash_open_stateid(s);
4007 s->st_stid.sc_type = NFS4_CLOSED_STID;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04004008}
4009
Linus Torvalds1da177e2005-04-16 15:20:36 -07004010/*
4011 * nfs4_unlock_state() called after encode
4012 */
Al Virob37ad282006-10-19 23:28:59 -07004013__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004014nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004015 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004016{
Al Virob37ad282006-10-19 23:28:59 -07004017 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004018 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004019 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004020 struct net *net = SVC_NET(rqstp);
4021 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004022
Al Viroa6a9f182013-09-16 10:57:01 -04004023 dprintk("NFSD: nfsd4_close on file %pd\n",
4024 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004025
4026 nfs4_lock_state();
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004027 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
4028 &close->cl_stateid,
4029 NFS4_OPEN_STID|NFS4_CLOSED_STID,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004030 &stp, nn);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004031 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004032 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004033 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004034 oo = openowner(stp->st_stateowner);
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004035 update_stateid(&stp->st_stid.sc_stateid);
4036 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004038 nfsd4_close_open_stateid(stp);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004039
Benny Halevy01a87d92013-10-14 09:01:55 +03004040 if (cstate->minorversion)
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004041 free_generic_stateid(stp);
Benny Halevy01a87d92013-10-14 09:01:55 +03004042 else
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004043 oo->oo_last_closed_stid = stp;
J. Bruce Fields04ef5952006-01-18 17:43:21 -08004044
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004045 if (list_empty(&oo->oo_owner.so_stateids)) {
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04004046 if (cstate->minorversion)
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004047 release_openowner(oo);
J. Bruce Fields3d74e6a2013-03-22 17:44:19 -04004048 else {
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004049 /*
4050 * In the 4.0 case we need to keep the owners around a
4051 * little while to handle CLOSE replay.
4052 */
fanchaoting53584f62013-04-11 21:24:13 +08004053 move_to_close_lru(oo, SVC_NET(rqstp));
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04004054 }
4055 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004056out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004057 if (!cstate->replay_owner)
4058 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004059 return status;
4060}
4061
Al Virob37ad282006-10-19 23:28:59 -07004062__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004063nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4064 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004065{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004066 struct nfs4_delegation *dp;
4067 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004068 struct nfs4_stid *s;
Al Virob37ad282006-10-19 23:28:59 -07004069 __be32 status;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004070 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004071
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004072 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004073 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004074
4075 nfs4_lock_state();
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004076 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s,
4077 cstate->minorversion, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004078 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004079 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004080 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004081 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004082 if (status)
4083 goto out;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004084
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004085 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004086out:
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004087 nfs4_unlock_state();
4088
Linus Torvalds1da177e2005-04-16 15:20:36 -07004089 return status;
4090}
4091
4092
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004094
J. Bruce Fields009673b2011-11-07 17:40:10 -05004095#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004096
Benny Halevy87df4de2008-12-15 19:42:03 +02004097static inline u64
4098end_offset(u64 start, u64 len)
4099{
4100 u64 end;
4101
4102 end = start + len;
4103 return end >= start ? end: NFS4_MAX_UINT64;
4104}
4105
4106/* last octet in a range */
4107static inline u64
4108last_byte_offset(u64 start, u64 len)
4109{
4110 u64 end;
4111
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004112 WARN_ON_ONCE(!len);
Benny Halevy87df4de2008-12-15 19:42:03 +02004113 end = start + len;
4114 return end > start ? end - 1: NFS4_MAX_UINT64;
4115}
4116
J. Bruce Fields009673b2011-11-07 17:40:10 -05004117static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004118{
4119 return (file_hashval(inode) + cl_id
4120 + opaque_hashval(ownername->data, ownername->len))
J. Bruce Fields009673b2011-11-07 17:40:10 -05004121 & LOCKOWNER_INO_HASH_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004122}
4123
Linus Torvalds1da177e2005-04-16 15:20:36 -07004124/*
4125 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4126 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4127 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4128 * locking, this prevents us from being completely protocol-compliant. The
4129 * real solution to this problem is to start using unsigned file offsets in
4130 * the VFS, but this is a very deep change!
4131 */
4132static inline void
4133nfs4_transform_lock_offset(struct file_lock *lock)
4134{
4135 if (lock->fl_start < 0)
4136 lock->fl_start = OFFSET_MAX;
4137 if (lock->fl_end < 0)
4138 lock->fl_end = OFFSET_MAX;
4139}
4140
NeilBrownd5b90262006-04-10 22:55:22 -07004141/* Hack!: For now, we're defining this just so we can use a pointer to it
4142 * as a unique cookie to identify our (NFSv4's) posix locks. */
Alexey Dobriyan7b021962009-09-21 17:01:12 -07004143static const struct lock_manager_operations nfsd_posix_mng_ops = {
NeilBrownd5b90262006-04-10 22:55:22 -07004144};
Linus Torvalds1da177e2005-04-16 15:20:36 -07004145
4146static inline void
4147nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
4148{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004149 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004150
NeilBrownd5b90262006-04-10 22:55:22 -07004151 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004152 lo = (struct nfs4_lockowner *) fl->fl_owner;
4153 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
4154 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04004155 if (!deny->ld_owner.data)
4156 /* We just don't care that much */
4157 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004158 deny->ld_owner.len = lo->lo_owner.so_owner.len;
4159 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07004160 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04004161nevermind:
4162 deny->ld_owner.len = 0;
4163 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07004164 deny->ld_clientid.cl_boot = 0;
4165 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004166 }
4167 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02004168 deny->ld_length = NFS4_MAX_UINT64;
4169 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004170 deny->ld_length = fl->fl_end - fl->fl_start + 1;
4171 deny->ld_type = NFS4_READ_LT;
4172 if (fl->fl_type != F_RDLCK)
4173 deny->ld_type = NFS4_WRITE_LT;
4174}
4175
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004176static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner)
4177{
4178 struct nfs4_ol_stateid *lst;
4179
4180 if (!same_owner_str(&lo->lo_owner, owner, clid))
4181 return false;
J. Bruce Fields27b11422014-05-08 11:19:41 -04004182 if (list_empty(&lo->lo_owner.so_stateids)) {
4183 WARN_ON_ONCE(1);
4184 return false;
4185 }
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004186 lst = list_first_entry(&lo->lo_owner.so_stateids,
4187 struct nfs4_ol_stateid, st_perstateowner);
4188 return lst->st_file->fi_inode == inode;
4189}
4190
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004191static struct nfs4_lockowner *
4192find_lockowner_str(struct inode *inode, clientid_t *clid,
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004193 struct xdr_netobj *owner, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004194{
J. Bruce Fields009673b2011-11-07 17:40:10 -05004195 unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner);
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004196 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004198 list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05004199 if (same_lockowner_ino(lo, inode, clid, owner))
4200 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004201 }
4202 return NULL;
4203}
4204
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004205static 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 -04004206{
J. Bruce Fields009673b2011-11-07 17:40:10 -05004207 struct inode *inode = open_stp->st_file->fi_inode;
4208 unsigned int inohash = lockowner_ino_hashval(inode,
4209 clp->cl_clientid.cl_id, &lo->lo_owner.so_owner);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004210 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
J. Bruce Fields009673b2011-11-07 17:40:10 -05004211
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004212 list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004213 list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004214 list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04004215}
4216
Linus Torvalds1da177e2005-04-16 15:20:36 -07004217/*
4218 * Alloc a lock owner structure.
4219 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03004220 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004221 *
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004222 * strhashval = ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07004223 */
4224
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004225static struct nfs4_lockowner *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004226alloc_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 -04004227 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004228
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004229 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
4230 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004232 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
4233 lo->lo_owner.so_is_open_owner = 0;
Neil Brownb59e3c02005-09-13 01:25:38 -07004234 /* It is the openowner seqid that will be incremented in encode in the
4235 * case of new lockowners; so increment the lock seqid manually: */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004236 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
4237 hash_lockowner(lo, strhashval, clp, open_stp);
4238 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004239}
4240
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004241static struct nfs4_ol_stateid *
4242alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004244 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04004245 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004246
J. Bruce Fields996e0932011-10-17 11:14:48 -04004247 stp = nfs4_alloc_stateid(clp);
NeilBrown5ac049a2005-06-23 22:03:03 -07004248 if (stp == NULL)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -04004249 return NULL;
J. Bruce Fields3abdb602013-02-03 12:23:01 -05004250 stp->st_stid.sc_type = NFS4_LOCK_STID;
NeilBrown8beefa22005-06-23 22:03:08 -07004251 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004252 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
4253 stp->st_stateowner = &lo->lo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07004254 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004255 stp->st_file = fp;
J. Bruce Fields0997b172011-03-02 18:01:35 -05004256 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004257 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07004258 stp->st_openstp = open_stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004259 return stp;
4260}
4261
NeilBrownfd39ca92005-06-23 22:04:03 -07004262static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263check_lock_length(u64 offset, u64 length)
4264{
Benny Halevy87df4de2008-12-15 19:42:03 +02004265 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07004266 LOFF_OVERFLOW(offset, length)));
4267}
4268
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004269static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05004270{
4271 struct nfs4_file *fp = lock_stp->st_file;
4272 int oflag = nfs4_access_to_omode(access);
4273
Jeff Layton82c5ff12012-05-11 09:45:13 -04004274 if (test_access(access, lock_stp))
J. Bruce Fields0997b172011-03-02 18:01:35 -05004275 return;
4276 nfs4_file_get_access(fp, oflag);
Jeff Layton82c5ff12012-05-11 09:45:13 -04004277 set_access(access, lock_stp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05004278}
4279
J. Bruce Fields2355c592012-04-25 16:56:22 -04004280static __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 -04004281{
4282 struct nfs4_file *fi = ost->st_file;
4283 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4284 struct nfs4_client *cl = oo->oo_owner.so_client;
4285 struct nfs4_lockowner *lo;
4286 unsigned int strhashval;
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004287 struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004288
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004289 lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid,
4290 &lock->v.new.owner, nn);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004291 if (lo) {
4292 if (!cstate->minorversion)
4293 return nfserr_bad_seqid;
4294 /* XXX: a lockowner always has exactly one stateid: */
4295 *lst = list_first_entry(&lo->lo_owner.so_stateids,
4296 struct nfs4_ol_stateid, st_perstateowner);
4297 return nfs_ok;
4298 }
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004299 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004300 &lock->v.new.owner);
4301 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4302 if (lo == NULL)
4303 return nfserr_jukebox;
4304 *lst = alloc_init_lock_stateid(lo, fi, ost);
4305 if (*lst == NULL) {
4306 release_lockowner(lo);
4307 return nfserr_jukebox;
4308 }
4309 *new = true;
4310 return nfs_ok;
4311}
4312
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313/*
4314 * LOCK operation
4315 */
Al Virob37ad282006-10-19 23:28:59 -07004316__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004317nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004318 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004320 struct nfs4_openowner *open_sop = NULL;
4321 struct nfs4_lockowner *lock_sop = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004322 struct nfs4_ol_stateid *lock_stp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04004323 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004324 struct file_lock *file_lock = NULL;
4325 struct file_lock *conflock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004326 __be32 status = 0;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004327 bool new_state = false;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004328 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07004329 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004330 struct net *net = SVC_NET(rqstp);
4331 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332
4333 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4334 (long long) lock->lk_offset,
4335 (long long) lock->lk_length);
4336
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337 if (check_lock_length(lock->lk_offset, lock->lk_length))
4338 return nfserr_inval;
4339
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004340 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02004341 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08004342 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4343 return status;
4344 }
4345
Linus Torvalds1da177e2005-04-16 15:20:36 -07004346 nfs4_lock_state();
4347
4348 if (lock->lk_is_new) {
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004349 struct nfs4_ol_stateid *open_stp = NULL;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004350
4351 if (nfsd4_has_session(cstate))
4352 /* See rfc 5661 18.10.3: given clientid is ignored: */
4353 memcpy(&lock->v.new.clientid,
4354 &cstate->session->se_client->cl_clientid,
4355 sizeof(clientid_t));
4356
Linus Torvalds1da177e2005-04-16 15:20:36 -07004357 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004358 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004359 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004360
Linus Torvalds1da177e2005-04-16 15:20:36 -07004361 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004362 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004363 lock->lk_new_open_seqid,
4364 &lock->lk_new_open_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004365 &open_stp, nn);
NeilBrown37515172005-07-07 17:59:16 -07004366 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004367 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004368 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004369 status = nfserr_bad_stateid;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004370 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004371 &lock->v.new.clientid))
4372 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004373 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4374 &lock_stp, &new_state);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004375 } else
Benny Halevydd453df2009-04-03 08:28:41 +03004376 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004377 lock->lk_old_lock_seqid,
4378 &lock->lk_old_lock_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004379 NFS4_LOCK_STID, &lock_stp, nn);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004380 if (status)
4381 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004382 lock_sop = lockowner(lock_stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004383
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004384 lkflg = setlkflg(lock->lk_type);
4385 status = nfs4_check_openmode(lock_stp, lkflg);
4386 if (status)
4387 goto out;
4388
NeilBrown0dd395d2005-07-07 17:59:15 -07004389 status = nfserr_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004390 if (locks_in_grace(net) && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07004391 goto out;
4392 status = nfserr_no_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004393 if (!locks_in_grace(net) && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07004394 goto out;
4395
Jeff Layton21179d82012-08-21 08:03:32 -04004396 file_lock = locks_alloc_lock();
4397 if (!file_lock) {
4398 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4399 status = nfserr_jukebox;
4400 goto out;
4401 }
4402
4403 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004404 switch (lock->lk_type) {
4405 case NFS4_READ_LT:
4406 case NFS4_READW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004407 filp = find_readable_file(lock_stp->st_file);
4408 if (filp)
4409 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Jeff Layton21179d82012-08-21 08:03:32 -04004410 file_lock->fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004411 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004412 case NFS4_WRITE_LT:
4413 case NFS4_WRITEW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004414 filp = find_writeable_file(lock_stp->st_file);
4415 if (filp)
4416 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Jeff Layton21179d82012-08-21 08:03:32 -04004417 file_lock->fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004418 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004419 default:
4420 status = nfserr_inval;
4421 goto out;
4422 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004423 if (!filp) {
4424 status = nfserr_openmode;
4425 goto out;
4426 }
Jeff Layton21179d82012-08-21 08:03:32 -04004427 file_lock->fl_owner = (fl_owner_t)lock_sop;
4428 file_lock->fl_pid = current->tgid;
4429 file_lock->fl_file = filp;
4430 file_lock->fl_flags = FL_POSIX;
4431 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4432 file_lock->fl_start = lock->lk_offset;
4433 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4434 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004435
Jeff Layton21179d82012-08-21 08:03:32 -04004436 conflock = locks_alloc_lock();
4437 if (!conflock) {
4438 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4439 status = nfserr_jukebox;
4440 goto out;
4441 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004442
Jeff Layton21179d82012-08-21 08:03:32 -04004443 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07004444 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004445 case 0: /* success! */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004446 update_stateid(&lock_stp->st_stid.sc_stateid);
4447 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004448 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07004449 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004450 break;
4451 case (EAGAIN): /* conflock holds conflicting lock */
4452 status = nfserr_denied;
4453 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
Jeff Layton21179d82012-08-21 08:03:32 -04004454 nfs4_set_lock_denied(conflock, &lock->lk_denied);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004455 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004456 case (EDEADLK):
4457 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004458 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04004459 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05004460 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04004461 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004462 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004463 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004464out:
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004465 if (status && new_state)
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05004466 release_lockowner(lock_sop);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004467 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004468 if (!cstate->replay_owner)
4469 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004470 if (file_lock)
4471 locks_free_lock(file_lock);
4472 if (conflock)
4473 locks_free_lock(conflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004474 return status;
4475}
4476
4477/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004478 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4479 * so we do a temporary open here just to get an open file to pass to
4480 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4481 * inode operation.)
4482 */
Al Viro04da6e92012-04-13 00:00:04 -04004483static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004484{
4485 struct file *file;
Al Viro04da6e92012-04-13 00:00:04 -04004486 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4487 if (!err) {
4488 err = nfserrno(vfs_test_lock(file, lock));
4489 nfsd_close(file);
4490 }
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004491 return err;
4492}
4493
4494/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004495 * LOCKT operation
4496 */
Al Virob37ad282006-10-19 23:28:59 -07004497__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004498nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4499 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004500{
4501 struct inode *inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004502 struct file_lock *file_lock = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004503 struct nfs4_lockowner *lo;
Al Virob37ad282006-10-19 23:28:59 -07004504 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004505 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004507 if (locks_in_grace(SVC_NET(rqstp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508 return nfserr_grace;
4509
4510 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4511 return nfserr_inval;
4512
Linus Torvalds1da177e2005-04-16 15:20:36 -07004513 nfs4_lock_state();
4514
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004515 if (!nfsd4_has_session(cstate)) {
4516 status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL);
4517 if (status)
4518 goto out;
4519 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004520
J. Bruce Fields75c096f2011-08-15 18:39:32 -04004521 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004524 inode = cstate->current_fh.fh_dentry->d_inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004525 file_lock = locks_alloc_lock();
4526 if (!file_lock) {
4527 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4528 status = nfserr_jukebox;
4529 goto out;
4530 }
4531 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532 switch (lockt->lt_type) {
4533 case NFS4_READ_LT:
4534 case NFS4_READW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004535 file_lock->fl_type = F_RDLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536 break;
4537 case NFS4_WRITE_LT:
4538 case NFS4_WRITEW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004539 file_lock->fl_type = F_WRLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540 break;
4541 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04004542 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004543 status = nfserr_inval;
4544 goto out;
4545 }
4546
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03004547 lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004548 if (lo)
Jeff Layton21179d82012-08-21 08:03:32 -04004549 file_lock->fl_owner = (fl_owner_t)lo;
4550 file_lock->fl_pid = current->tgid;
4551 file_lock->fl_flags = FL_POSIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004552
Jeff Layton21179d82012-08-21 08:03:32 -04004553 file_lock->fl_start = lockt->lt_offset;
4554 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555
Jeff Layton21179d82012-08-21 08:03:32 -04004556 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004557
Jeff Layton21179d82012-08-21 08:03:32 -04004558 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
Al Viro04da6e92012-04-13 00:00:04 -04004559 if (status)
Marc Eshelfd85b812006-11-28 16:26:41 -05004560 goto out;
Al Viro04da6e92012-04-13 00:00:04 -04004561
Jeff Layton21179d82012-08-21 08:03:32 -04004562 if (file_lock->fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004563 status = nfserr_denied;
Jeff Layton21179d82012-08-21 08:03:32 -04004564 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004565 }
4566out:
4567 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004568 if (file_lock)
4569 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004570 return status;
4571}
4572
Al Virob37ad282006-10-19 23:28:59 -07004573__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004574nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004575 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004576{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004577 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004579 struct file_lock *file_lock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004580 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07004581 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004582 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4583
Linus Torvalds1da177e2005-04-16 15:20:36 -07004584 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4585 (long long) locku->lu_offset,
4586 (long long) locku->lu_length);
4587
4588 if (check_lock_length(locku->lu_offset, locku->lu_length))
4589 return nfserr_inval;
4590
4591 nfs4_lock_state();
4592
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004593 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004594 &locku->lu_stateid, NFS4_LOCK_STID,
4595 &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004596 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004598 filp = find_any_file(stp->st_file);
4599 if (!filp) {
4600 status = nfserr_lock_range;
4601 goto out;
4602 }
Jeff Layton21179d82012-08-21 08:03:32 -04004603 file_lock = locks_alloc_lock();
4604 if (!file_lock) {
4605 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4606 status = nfserr_jukebox;
4607 goto out;
4608 }
4609 locks_init_lock(file_lock);
4610 file_lock->fl_type = F_UNLCK;
J. Bruce Fields0a262ff2013-06-17 17:29:40 -04004611 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
Jeff Layton21179d82012-08-21 08:03:32 -04004612 file_lock->fl_pid = current->tgid;
4613 file_lock->fl_file = filp;
4614 file_lock->fl_flags = FL_POSIX;
4615 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4616 file_lock->fl_start = locku->lu_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004617
Jeff Layton21179d82012-08-21 08:03:32 -04004618 file_lock->fl_end = last_byte_offset(locku->lu_offset,
4619 locku->lu_length);
4620 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004621
Jeff Layton21179d82012-08-21 08:03:32 -04004622 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07004623 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05004624 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625 goto out_nfserr;
4626 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004627 update_stateid(&stp->st_stid.sc_stateid);
4628 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629
4630out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004631 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields71c3bcd2011-09-27 21:42:29 -04004632 if (!cstate->replay_owner)
4633 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004634 if (file_lock)
4635 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004636 return status;
4637
4638out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07004639 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004640 goto out;
4641}
4642
4643/*
4644 * returns
4645 * 1: locks held by lockowner
4646 * 0: no locks held by lockowner
4647 */
4648static int
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004649check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004650{
4651 struct file_lock **flpp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004652 struct inode *inode = filp->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004653 int status = 0;
4654
Jeff Layton1c8c6012013-06-21 08:58:15 -04004655 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004656 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004657 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004658 status = 1;
4659 goto out;
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004660 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004661 }
4662out:
Jeff Layton1c8c6012013-06-21 08:58:15 -04004663 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004664 return status;
4665}
4666
Al Virob37ad282006-10-19 23:28:59 -07004667__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004668nfsd4_release_lockowner(struct svc_rqst *rqstp,
4669 struct nfsd4_compound_state *cstate,
4670 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004671{
4672 clientid_t *clid = &rlockowner->rl_clientid;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004673 struct nfs4_stateowner *sop;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004674 struct nfs4_lockowner *lo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004675 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676 struct xdr_netobj *owner = &rlockowner->rl_owner;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004677 struct list_head matches;
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004678 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
Al Virob37ad282006-10-19 23:28:59 -07004679 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004680 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004681
4682 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4683 clid->cl_boot, clid->cl_id);
4684
Linus Torvalds1da177e2005-04-16 15:20:36 -07004685 nfs4_lock_state();
4686
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004687 status = lookup_clientid(clid, cstate->minorversion, nn, NULL);
4688 if (status)
4689 goto out;
4690
NeilBrown3e9e3db2005-06-23 22:04:20 -07004691 status = nfserr_locks_held;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004692 INIT_LIST_HEAD(&matches);
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004693
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03004694 list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004695 if (sop->so_is_open_owner)
4696 continue;
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004697 if (!same_owner_str(sop, owner, clid))
4698 continue;
4699 list_for_each_entry(stp, &sop->so_stateids,
4700 st_perstateowner) {
4701 lo = lockowner(sop);
4702 if (check_for_locks(stp->st_file, lo))
4703 goto out;
4704 list_add(&lo->lo_list, &matches);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004705 }
NeilBrown3e9e3db2005-06-23 22:04:20 -07004706 }
4707 /* Clients probably won't expect us to return with some (but not all)
4708 * of the lockowner state released; so don't release any until all
4709 * have been checked. */
4710 status = nfs_ok;
NeilBrown0fa822e2005-07-07 17:59:14 -07004711 while (!list_empty(&matches)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004712 lo = list_entry(matches.next, struct nfs4_lockowner,
4713 lo_list);
NeilBrown0fa822e2005-07-07 17:59:14 -07004714 /* unhash_stateowner deletes so_perclient only
4715 * for openowners. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004716 list_del(&lo->lo_list);
4717 release_lockowner(lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004718 }
4719out:
4720 nfs4_unlock_state();
4721 return status;
4722}
4723
4724static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07004725alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004726{
NeilBrowna55370a2005-06-23 22:03:52 -07004727 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004728}
4729
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004730bool
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004731nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
NeilBrownc7b9a452005-06-23 22:04:30 -07004732{
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004733 struct nfs4_client_reclaim *crp;
NeilBrownc7b9a452005-06-23 22:04:30 -07004734
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004735 crp = nfsd4_find_reclaim_client(name, nn);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004736 return (crp && crp->cr_clp);
NeilBrownc7b9a452005-06-23 22:04:30 -07004737}
4738
Linus Torvalds1da177e2005-04-16 15:20:36 -07004739/*
4740 * failure => all reset bets are off, nfserr_no_grace...
4741 */
Jeff Layton772a9bb2012-11-12 15:00:54 -05004742struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004743nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004744{
4745 unsigned int strhashval;
Jeff Layton772a9bb2012-11-12 15:00:54 -05004746 struct nfs4_client_reclaim *crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004747
NeilBrowna55370a2005-06-23 22:03:52 -07004748 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4749 crp = alloc_reclaim();
Jeff Layton772a9bb2012-11-12 15:00:54 -05004750 if (crp) {
4751 strhashval = clientstr_hashval(name);
4752 INIT_LIST_HEAD(&crp->cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004753 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
Jeff Layton772a9bb2012-11-12 15:00:54 -05004754 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05004755 crp->cr_clp = NULL;
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004756 nn->reclaim_str_hashtbl_size++;
Jeff Layton772a9bb2012-11-12 15:00:54 -05004757 }
4758 return crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004759}
4760
Jeff Layton2a4317c2012-03-21 16:42:43 -04004761void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004762nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
Jeff Laytonce30e532012-11-12 15:00:53 -05004763{
4764 list_del(&crp->cr_strhash);
4765 kfree(crp);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004766 nn->reclaim_str_hashtbl_size--;
Jeff Laytonce30e532012-11-12 15:00:53 -05004767}
4768
4769void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004770nfs4_release_reclaim(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004771{
4772 struct nfs4_client_reclaim *crp = NULL;
4773 int i;
4774
Linus Torvalds1da177e2005-04-16 15:20:36 -07004775 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004776 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
4777 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004778 struct nfs4_client_reclaim, cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004779 nfs4_remove_reclaim_record(crp, nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004780 }
4781 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004782 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004783}
4784
4785/*
4786 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
Jeff Layton2a4317c2012-03-21 16:42:43 -04004787struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004788nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004789{
4790 unsigned int strhashval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004791 struct nfs4_client_reclaim *crp = NULL;
4792
Jeff Layton278c9312012-11-12 15:00:52 -05004793 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004794
Jeff Layton278c9312012-11-12 15:00:52 -05004795 strhashval = clientstr_hashval(recdir);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03004796 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
Jeff Layton278c9312012-11-12 15:00:52 -05004797 if (same_name(crp->cr_recdir, recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798 return crp;
4799 }
4800 }
4801 return NULL;
4802}
4803
4804/*
4805* Called from OPEN. Look for clientid in reclaim list.
4806*/
Al Virob37ad282006-10-19 23:28:59 -07004807__be32
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004808nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004809{
Jeff Laytona52d7262012-03-21 09:52:02 -04004810 struct nfs4_client *clp;
4811
4812 /* find clientid in conf_id_hashtbl */
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03004813 clp = find_confirmed_client(clid, sessions, nn);
Jeff Laytona52d7262012-03-21 09:52:02 -04004814 if (clp == NULL)
4815 return nfserr_reclaim_bad;
4816
4817 return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004818}
4819
Bryan Schumaker65178db2011-11-01 13:35:21 -04004820#ifdef CONFIG_NFSD_FAULT_INJECTION
4821
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004822u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
4823{
J. Bruce Fields221a6872013-04-01 22:23:49 -04004824 if (mark_client_expired(clp))
4825 return 0;
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004826 expire_client(clp);
4827 return 1;
4828}
4829
Bryan Schumaker184c1842012-11-29 11:40:44 -05004830u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
4831{
4832 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05004833 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05004834 printk(KERN_INFO "NFS Client: %s\n", buf);
4835 return 1;
4836}
4837
4838static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
4839 const char *type)
4840{
4841 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05004842 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05004843 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
4844}
4845
Bryan Schumakerfc291712012-11-29 11:40:40 -05004846static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *))
4847{
4848 struct nfs4_openowner *oop;
4849 struct nfs4_lockowner *lop, *lo_next;
4850 struct nfs4_ol_stateid *stp, *st_next;
4851 u64 count = 0;
4852
4853 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
4854 list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) {
4855 list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) {
4856 if (func)
4857 func(lop);
4858 if (++count == max)
4859 return count;
4860 }
4861 }
4862 }
4863
4864 return count;
4865}
4866
4867u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
4868{
4869 return nfsd_foreach_client_lock(clp, max, release_lockowner);
4870}
4871
Bryan Schumaker184c1842012-11-29 11:40:44 -05004872u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
4873{
4874 u64 count = nfsd_foreach_client_lock(clp, max, NULL);
4875 nfsd_print_count(clp, count, "locked files");
4876 return count;
4877}
4878
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05004879static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
4880{
4881 struct nfs4_openowner *oop, *next;
4882 u64 count = 0;
4883
4884 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
4885 if (func)
4886 func(oop);
4887 if (++count == max)
4888 break;
4889 }
4890
4891 return count;
4892}
4893
4894u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
4895{
4896 return nfsd_foreach_client_open(clp, max, release_openowner);
4897}
4898
Bryan Schumaker184c1842012-11-29 11:40:44 -05004899u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
4900{
4901 u64 count = nfsd_foreach_client_open(clp, max, NULL);
4902 nfsd_print_count(clp, count, "open files");
4903 return count;
4904}
4905
Bryan Schumaker269de302012-11-29 11:40:42 -05004906static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
4907 struct list_head *victims)
4908{
4909 struct nfs4_delegation *dp, *next;
4910 u64 count = 0;
4911
4912 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
4913 if (victims)
4914 list_move(&dp->dl_recall_lru, victims);
4915 if (++count == max)
4916 break;
4917 }
4918 return count;
4919}
4920
4921u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
4922{
4923 struct nfs4_delegation *dp, *next;
4924 LIST_HEAD(victims);
4925 u64 count;
4926
4927 spin_lock(&recall_lock);
4928 count = nfsd_find_all_delegations(clp, max, &victims);
4929 spin_unlock(&recall_lock);
4930
4931 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004932 revoke_delegation(dp);
Bryan Schumaker269de302012-11-29 11:40:42 -05004933
4934 return count;
4935}
4936
4937u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
4938{
4939 struct nfs4_delegation *dp, *next;
4940 LIST_HEAD(victims);
4941 u64 count;
4942
4943 spin_lock(&recall_lock);
4944 count = nfsd_find_all_delegations(clp, max, &victims);
4945 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
4946 nfsd_break_one_deleg(dp);
4947 spin_unlock(&recall_lock);
4948
4949 return count;
4950}
4951
Bryan Schumaker184c1842012-11-29 11:40:44 -05004952u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
4953{
4954 u64 count = 0;
4955
4956 spin_lock(&recall_lock);
4957 count = nfsd_find_all_delegations(clp, max, NULL);
4958 spin_unlock(&recall_lock);
4959
4960 nfsd_print_count(clp, count, "delegations");
4961 return count;
4962}
4963
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004964u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
Bryan Schumaker65178db2011-11-01 13:35:21 -04004965{
4966 struct nfs4_client *clp, *next;
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004967 u64 count = 0;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004968 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004969
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004970 if (!nfsd_netns_ready(nn))
4971 return 0;
4972
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03004973 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004974 count += func(clp, max - count);
4975 if ((max != 0) && (count >= max))
Bryan Schumaker65178db2011-11-01 13:35:21 -04004976 break;
4977 }
Bryan Schumaker65178db2011-11-01 13:35:21 -04004978
Bryan Schumaker44e34da602012-11-29 11:40:39 -05004979 return count;
4980}
4981
Bryan Schumaker6c1e82a2012-11-29 11:40:46 -05004982struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
4983{
4984 struct nfs4_client *clp;
4985 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
4986
4987 if (!nfsd_netns_ready(nn))
4988 return NULL;
4989
4990 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
4991 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
4992 return clp;
4993 }
4994 return NULL;
4995}
4996
Bryan Schumaker65178db2011-11-01 13:35:21 -04004997#endif /* CONFIG_NFSD_FAULT_INJECTION */
4998
Meelap Shahc2f1a552007-07-17 04:04:39 -07004999/*
5000 * Since the lifetime of a delegation isn't limited to that of an open, a
5001 * client may quite reasonably hang on to a delegation as long as it has
5002 * the inode cached. This becomes an obvious problem the first time a
5003 * client's inode cache approaches the size of the server's total memory.
5004 *
5005 * For now we avoid this problem by imposing a hard limit on the number
5006 * of delegations, which varies according to the server's memory size.
5007 */
5008static void
5009set_max_delegations(void)
5010{
5011 /*
5012 * Allow at most 4 delegations per megabyte of RAM. Quick
5013 * estimates suggest that in the worst case (where every delegation
5014 * is for a different inode), a delegation could take about 1.5K,
5015 * giving a worst case usage of about 6% of memory.
5016 */
5017 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
5018}
5019
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005020static int nfs4_state_create_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005021{
5022 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5023 int i;
5024
5025 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5026 CLIENT_HASH_SIZE, GFP_KERNEL);
5027 if (!nn->conf_id_hashtbl)
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005028 goto err;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005029 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5030 CLIENT_HASH_SIZE, GFP_KERNEL);
5031 if (!nn->unconf_id_hashtbl)
5032 goto err_unconf_id;
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005033 nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
5034 OWNER_HASH_SIZE, GFP_KERNEL);
5035 if (!nn->ownerstr_hashtbl)
5036 goto err_ownerstr;
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005037 nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) *
5038 LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL);
5039 if (!nn->lockowner_ino_hashtbl)
5040 goto err_lockowner_ino;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005041 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
5042 SESSION_HASH_SIZE, GFP_KERNEL);
5043 if (!nn->sessionid_hashtbl)
5044 goto err_sessionid;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005045
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005046 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005047 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005048 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005049 }
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005050 for (i = 0; i < OWNER_HASH_SIZE; i++)
5051 INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005052 for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
5053 INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005054 for (i = 0; i < SESSION_HASH_SIZE; i++)
5055 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005056 nn->conf_name_tree = RB_ROOT;
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005057 nn->unconf_name_tree = RB_ROOT;
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03005058 INIT_LIST_HEAD(&nn->client_lru);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03005059 INIT_LIST_HEAD(&nn->close_lru);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04005060 INIT_LIST_HEAD(&nn->del_recall_lru);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03005061 spin_lock_init(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005062
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005063 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005064 get_net(net);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005065
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005066 return 0;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005067
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005068err_sessionid:
5069 kfree(nn->lockowner_ino_hashtbl);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005070err_lockowner_ino:
5071 kfree(nn->ownerstr_hashtbl);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005072err_ownerstr:
5073 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005074err_unconf_id:
5075 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03005076err:
5077 return -ENOMEM;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005078}
5079
5080static void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005081nfs4_state_destroy_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005082{
5083 int i;
5084 struct nfs4_client *clp = NULL;
5085 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5086
5087 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5088 while (!list_empty(&nn->conf_id_hashtbl[i])) {
5089 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5090 destroy_client(clp);
5091 }
5092 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005093
Kinglong Mee2b905632014-03-26 22:09:30 +08005094 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5095 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
5096 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5097 destroy_client(clp);
5098 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03005099 }
5100
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03005101 kfree(nn->sessionid_hashtbl);
Stanislav Kinsbursky20e9e2b2012-11-14 18:21:46 +03005102 kfree(nn->lockowner_ino_hashtbl);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03005103 kfree(nn->ownerstr_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03005104 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005105 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005106 put_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005107}
5108
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03005109int
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005110nfs4_state_start_net(struct net *net)
NeilBrownac4d8ff22005-06-23 22:03:30 -07005111{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04005112 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005113 int ret;
5114
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005115 ret = nfs4_state_create_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03005116 if (ret)
5117 return ret;
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04005118 nfsd4_client_tracking_init(net);
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04005119 nn->boot_time = get_seconds();
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04005120 locks_start_grace(net, &nn->nfsd4_manager);
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04005121 nn->grace_ended = false;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005122 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03005123 nn->nfsd4_grace, net);
5124 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005125 return 0;
5126}
5127
5128/* initialization to perform when the nfsd service is started: */
5129
5130int
5131nfs4_state_start(void)
5132{
5133 int ret;
5134
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005135 ret = set_callback_cred();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005136 if (ret)
5137 return -ENOMEM;
NeilBrown58da2822005-06-23 22:03:19 -07005138 laundry_wq = create_singlethread_workqueue("nfsd4");
Jeff Laytona6d6b782012-03-05 11:42:36 -05005139 if (laundry_wq == NULL) {
5140 ret = -ENOMEM;
5141 goto out_recovery;
5142 }
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005143 ret = nfsd4_create_callback_queue();
5144 if (ret)
5145 goto out_free_laundry;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03005146
Meelap Shahc2f1a552007-07-17 04:04:39 -07005147 set_max_delegations();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005148
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005149 return 0;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03005150
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005151out_free_laundry:
5152 destroy_workqueue(laundry_wq);
Jeff Laytona6d6b782012-03-05 11:42:36 -05005153out_recovery:
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05005154 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005155}
5156
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03005157void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005158nfs4_state_shutdown_net(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005159{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005160 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005161 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005162 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005163
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005164 cancel_delayed_work_sync(&nn->laundromat_work);
5165 locks_end_grace(&nn->nfsd4_manager);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05005166
J. Bruce Fieldse50a26d2013-10-30 10:33:09 -04005167 nfs4_lock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005168 INIT_LIST_HEAD(&reaplist);
5169 spin_lock(&recall_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04005170 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005171 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5172 list_move(&dp->dl_recall_lru, &reaplist);
5173 }
5174 spin_unlock(&recall_lock);
5175 list_for_each_safe(pos, next, &reaplist) {
5176 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04005177 destroy_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005178 }
5179
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005180 nfsd4_client_tracking_exit(net);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03005181 nfs4_state_destroy_net(net);
J. Bruce Fieldse50a26d2013-10-30 10:33:09 -04005182 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005183}
5184
5185void
5186nfs4_state_shutdown(void)
5187{
NeilBrown5e8d5c22006-04-10 22:55:37 -07005188 destroy_workqueue(laundry_wq);
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04005189 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005190}
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005191
5192static void
5193get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5194{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01005195 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
5196 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005197}
5198
5199static void
5200put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5201{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01005202 if (cstate->minorversion) {
5203 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
5204 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5205 }
5206}
5207
5208void
5209clear_current_stateid(struct nfsd4_compound_state *cstate)
5210{
5211 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005212}
5213
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005214/*
5215 * functions to set current state id
5216 */
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005217void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01005218nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5219{
5220 put_stateid(cstate, &odp->od_stateid);
5221}
5222
5223void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005224nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
5225{
5226 put_stateid(cstate, &open->op_stateid);
5227}
5228
5229void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005230nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5231{
5232 put_stateid(cstate, &close->cl_stateid);
5233}
5234
5235void
5236nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
5237{
5238 put_stateid(cstate, &lock->lk_resp_stateid);
5239}
5240
5241/*
5242 * functions to consume current state id
5243 */
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01005244
5245void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01005246nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5247{
5248 get_stateid(cstate, &odp->od_stateid);
5249}
5250
5251void
5252nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
5253{
5254 get_stateid(cstate, &drp->dr_stateid);
5255}
5256
5257void
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01005258nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
5259{
5260 get_stateid(cstate, &fsp->fr_stateid);
5261}
5262
5263void
5264nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
5265{
5266 get_stateid(cstate, &setattr->sa_stateid);
5267}
5268
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005269void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005270nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5271{
5272 get_stateid(cstate, &close->cl_stateid);
5273}
5274
5275void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005276nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005277{
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01005278 get_stateid(cstate, &locku->lu_stateid);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01005279}
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01005280
5281void
5282nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
5283{
5284 get_stateid(cstate, &read->rd_stateid);
5285}
5286
5287void
5288nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
5289{
5290 get_stateid(cstate, &write->wr_stateid);
5291}