blob: 47e94e33a975d801ddefbf36d4ed793333ff141b [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>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050041#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton363168b2009-08-14 12:57:56 -040042#include <linux/sunrpc/clnt.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020043#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050044#include "vfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46#define NFSDDBG_FACILITY NFSDDBG_PROC
47
48/* Globals */
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -050049time_t nfsd4_lease = 90; /* default lease time */
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050050time_t nfsd4_grace = 90;
NeilBrownfd39ca92005-06-23 22:04:03 -070051static time_t boot_time;
NeilBrownfd39ca92005-06-23 22:04:03 -070052static stateid_t zerostateid; /* bits all 0 */
53static stateid_t onestateid; /* bits all 1 */
Andy Adamsonec6b5d72009-04-03 08:28:28 +030054static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070055
56#define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
57#define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* forward declarations */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -040060static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
J. Bruce Fields8b671b82009-02-22 14:51:34 -080062/* Locking: */
63
64/* Currently used for almost all code touching nfsv4 state: */
Ingo Molnar353ab6e2006-03-26 01:37:12 -080065static DEFINE_MUTEX(client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
J. Bruce Fields8b671b82009-02-22 14:51:34 -080067/*
68 * Currently used for the del_recall_lru and file hash table. In an
69 * effort to decrease the scope of the client_mutex, this spinlock may
70 * eventually cover more:
71 */
72static DEFINE_SPINLOCK(recall_lock);
73
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -040074static struct kmem_cache *openowner_slab = NULL;
75static struct kmem_cache *lockowner_slab = NULL;
Christoph Lametere18b8902006-12-06 20:33:20 -080076static struct kmem_cache *file_slab = NULL;
77static struct kmem_cache *stateid_slab = NULL;
78static struct kmem_cache *deleg_slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -070079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080void
81nfs4_lock_state(void)
82{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080083 mutex_lock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084}
85
86void
87nfs4_unlock_state(void)
88{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080089 mutex_unlock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
92static inline u32
93opaque_hashval(const void *ptr, int nbytes)
94{
95 unsigned char *cptr = (unsigned char *) ptr;
96
97 u32 x = 0;
98 while (nbytes--) {
99 x *= 37;
100 x += *cptr++;
101 }
102 return x;
103}
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105static struct list_head del_recall_lru;
106
J. Bruce Fields32513b42011-10-13 16:00:16 -0400107static void nfsd4_free_file(struct nfs4_file *f)
108{
109 kmem_cache_free(file_slab, f);
110}
111
NeilBrown13cd2182005-06-23 22:03:10 -0700112static inline void
113put_nfs4_file(struct nfs4_file *fi)
114{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800115 if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) {
116 list_del(&fi->fi_hash);
117 spin_unlock(&recall_lock);
118 iput(fi->fi_inode);
J. Bruce Fields32513b42011-10-13 16:00:16 -0400119 nfsd4_free_file(fi);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800120 }
NeilBrown13cd2182005-06-23 22:03:10 -0700121}
122
123static inline void
124get_nfs4_file(struct nfs4_file *fi)
125{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800126 atomic_inc(&fi->fi_ref);
NeilBrown13cd2182005-06-23 22:03:10 -0700127}
128
NeilBrownef0f3392006-04-10 22:55:41 -0700129static int num_delegations;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700130unsigned int max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700131
132/*
133 * Open owner state (share locks)
134 */
135
J. Bruce Fields506f2752011-08-11 18:50:18 -0400136/* hash tables for open owners */
137#define OPEN_OWNER_HASH_BITS 8
138#define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
139#define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
NeilBrownef0f3392006-04-10 22:55:41 -0700140
J. Bruce Fields506f2752011-08-11 18:50:18 -0400141static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400142{
143 unsigned int ret;
144
145 ret = opaque_hashval(ownername->data, ownername->len);
146 ret += clientid;
J. Bruce Fields506f2752011-08-11 18:50:18 -0400147 return ret & OPEN_OWNER_HASH_MASK;
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400148}
NeilBrownef0f3392006-04-10 22:55:41 -0700149
J. Bruce Fields506f2752011-08-11 18:50:18 -0400150static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700151
152/* hash table for nfs4_file */
153#define FILE_HASH_BITS 8
154#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
Shan Wei35079582011-01-14 17:35:59 +0800155
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400156static unsigned int file_hashval(struct inode *ino)
157{
158 /* XXX: why are we hashing on inode pointer, anyway? */
159 return hash_ptr(ino, FILE_HASH_BITS);
160}
161
NeilBrownef0f3392006-04-10 22:55:41 -0700162static struct list_head file_hashtbl[FILE_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700163
J. Bruce Fields998db522010-08-07 09:21:41 -0400164static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400165{
166 BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
167 atomic_inc(&fp->fi_access[oflag]);
168}
169
J. Bruce Fields998db522010-08-07 09:21:41 -0400170static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
171{
172 if (oflag == O_RDWR) {
173 __nfs4_file_get_access(fp, O_RDONLY);
174 __nfs4_file_get_access(fp, O_WRONLY);
175 } else
176 __nfs4_file_get_access(fp, oflag);
177}
178
179static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400180{
181 if (fp->fi_fds[oflag]) {
182 fput(fp->fi_fds[oflag]);
183 fp->fi_fds[oflag] = NULL;
184 }
185}
186
J. Bruce Fields998db522010-08-07 09:21:41 -0400187static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400188{
189 if (atomic_dec_and_test(&fp->fi_access[oflag])) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400190 nfs4_file_put_fd(fp, oflag);
J. Bruce Fields3d02fa22011-09-19 15:07:41 -0400191 /*
192 * It's also safe to get rid of the RDWR open *if*
193 * we no longer have need of the other kind of access
194 * or if we already have the other kind of open:
195 */
196 if (fp->fi_fds[1-oflag]
197 || atomic_read(&fp->fi_access[1 - oflag]) == 0)
198 nfs4_file_put_fd(fp, O_RDWR);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400199 }
200}
201
J. Bruce Fields998db522010-08-07 09:21:41 -0400202static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
203{
204 if (oflag == O_RDWR) {
205 __nfs4_file_put_access(fp, O_RDONLY);
206 __nfs4_file_put_access(fp, O_WRONLY);
207 } else
208 __nfs4_file_put_access(fp, oflag);
209}
210
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400211static inline int get_new_stid(struct nfs4_stid *stid)
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400212{
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400213 static int min_stateid = 0;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400214 struct idr *stateids = &stid->sc_client->cl_stateids;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400215 int new_stid;
216 int error;
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400217
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400218 error = idr_get_new_above(stateids, stid, min_stateid, &new_stid);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400219 /*
J. Bruce Fields996e0932011-10-17 11:14:48 -0400220 * Note: the necessary preallocation was done in
221 * nfs4_alloc_stateid(). The idr code caps the number of
222 * preallocations that can exist at a time, but the state lock
223 * prevents anyone from using ours before we get here:
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400224 */
225 BUG_ON(error);
226 /*
227 * It shouldn't be a problem to reuse an opaque stateid value.
228 * I don't think it is for 4.1. But with 4.0 I worry that, for
229 * example, a stray write retransmission could be accepted by
230 * the server when it should have been rejected. Therefore,
231 * adopt a trick from the sctp code to attempt to maximize the
232 * amount of time until an id is reused, by ensuring they always
233 * "increase" (mod INT_MAX):
234 */
235
236 min_stateid = new_stid+1;
237 if (min_stateid == INT_MAX)
238 min_stateid = 0;
239 return new_stid;
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400240}
241
J. Bruce Fields996e0932011-10-17 11:14:48 -0400242static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type)
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400243{
244 stateid_t *s = &stid->sc_stateid;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400245 int new_id;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400246
247 stid->sc_type = type;
248 stid->sc_client = cl;
249 s->si_opaque.so_clid = cl->cl_clientid;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400250 new_id = get_new_stid(stid);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400251 s->si_opaque.so_id = (u32)new_id;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400252 /* Will be incremented before return to client: */
253 s->si_generation = 0;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400254}
255
256static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab)
257{
258 struct idr *stateids = &cl->cl_stateids;
259
260 if (!idr_pre_get(stateids, GFP_KERNEL))
261 return NULL;
262 /*
263 * Note: if we fail here (or any time between now and the time
264 * we actually get the new idr), we won't need to undo the idr
265 * preallocation, since the idr code caps the number of
266 * preallocated entries.
267 */
268 return kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400269}
270
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400271static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
272{
273 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
274}
275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276static struct nfs4_delegation *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400277alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
279 struct nfs4_delegation *dp;
280 struct nfs4_file *fp = stp->st_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
282 dprintk("NFSD alloc_init_deleg\n");
J. Bruce Fieldsc3e48082010-07-28 10:08:57 -0400283 /*
284 * Major work on the lease subsystem (for example, to support
285 * calbacks on stat) will be required before we can support
286 * write delegations properly.
287 */
288 if (type != NFS4_OPEN_DELEGATE_READ)
289 return NULL;
Meelap Shah47f99402007-07-17 04:04:40 -0700290 if (fp->fi_had_conflict)
291 return NULL;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700292 if (num_delegations > max_delegations)
NeilBrownef0f3392006-04-10 22:55:41 -0700293 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400294 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
NeilBrown5b2d21c2005-06-23 22:03:04 -0700295 if (dp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 return dp;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400297 init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400298 /*
299 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400300 * meaning of seqid 0 isn't meaningful, really, but let's avoid
301 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400302 */
303 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownef0f3392006-04-10 22:55:41 -0700304 num_delegations++;
NeilBrownea1da632005-06-23 22:04:17 -0700305 INIT_LIST_HEAD(&dp->dl_perfile);
306 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 INIT_LIST_HEAD(&dp->dl_recall_lru);
NeilBrown13cd2182005-06-23 22:03:10 -0700308 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 dp->dl_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 dp->dl_type = type;
J. Bruce Fields6c02eaa2009-02-02 17:30:51 -0500311 fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 dp->dl_time = 0;
313 atomic_set(&dp->dl_count, 1);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -0500314 INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 return dp;
316}
317
318void
319nfs4_put_delegation(struct nfs4_delegation *dp)
320{
321 if (atomic_dec_and_test(&dp->dl_count)) {
322 dprintk("NFSD: freeing dp %p\n",dp);
NeilBrown13cd2182005-06-23 22:03:10 -0700323 put_nfs4_file(dp->dl_file);
NeilBrown5b2d21c2005-06-23 22:03:04 -0700324 kmem_cache_free(deleg_slab, dp);
NeilBrownef0f3392006-04-10 22:55:41 -0700325 num_delegations--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 }
327}
328
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500329static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500331 if (atomic_dec_and_test(&fp->fi_delegees)) {
332 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
333 fp->fi_lease = NULL;
J. Bruce Fields4ee63622011-04-15 18:08:26 -0400334 fput(fp->fi_deleg_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500335 fp->fi_deleg_file = NULL;
336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337}
338
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400339static void unhash_stid(struct nfs4_stid *s)
340{
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400341 struct idr *stateids = &s->sc_client->cl_stateids;
342
343 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400344}
345
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346/* Called under the state lock. */
347static void
348unhash_delegation(struct nfs4_delegation *dp)
349{
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400350 unhash_stid(&dp->dl_stid);
NeilBrownea1da632005-06-23 22:04:17 -0700351 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 spin_lock(&recall_lock);
J. Bruce Fields5d926e82011-02-07 16:53:46 -0500353 list_del_init(&dp->dl_perfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 list_del_init(&dp->dl_recall_lru);
355 spin_unlock(&recall_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500356 nfs4_put_deleg_lease(dp->dl_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 nfs4_put_delegation(dp);
358}
359
360/*
361 * SETCLIENTID state
362 */
363
Benny Halevy36acb662010-05-12 00:13:04 +0300364/* client_lock protects the client lru list and session hash table */
Benny Halevy9089f1b2010-05-12 00:12:26 +0300365static DEFINE_SPINLOCK(client_lock);
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367/* Hash tables for nfs4_clientid state */
368#define CLIENT_HASH_BITS 4
369#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
370#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
371
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400372static unsigned int clientid_hashval(u32 id)
373{
374 return id & CLIENT_HASH_MASK;
375}
376
377static unsigned int clientstr_hashval(const char *name)
378{
379 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
380}
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382/*
383 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
384 * used in reboot/reset lease grace period processing
385 *
386 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
387 * setclientid_confirmed info.
388 *
389 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
390 * setclientid info.
391 *
392 * client_lru holds client queue ordered by nfs4_client.cl_time
393 * for lease renewal.
394 *
395 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
396 * for last close replay.
397 */
398static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
399static int reclaim_str_hashtbl_size = 0;
400static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
401static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
402static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
403static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
404static struct list_head client_lru;
405static struct list_head close_lru;
406
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400407/*
408 * We store the NONE, READ, WRITE, and BOTH bits separately in the
409 * st_{access,deny}_bmap field of the stateid, in order to track not
410 * only what share bits are currently in force, but also what
411 * combinations of share bits previous opens have used. This allows us
412 * to enforce the recommendation of rfc 3530 14.2.19 that the server
413 * return an error if the client attempt to downgrade to a combination
414 * of share bits not explicable by closing some of its previous opens.
415 *
416 * XXX: This enforcement is actually incomplete, since we don't keep
417 * track of access/deny bit combinations; so, e.g., we allow:
418 *
419 * OPEN allow read, deny write
420 * OPEN allow both, deny none
421 * DOWNGRADE allow read, deny none
422 *
423 * which we should reject.
424 */
425static void
426set_access(unsigned int *access, unsigned long bmap) {
427 int i;
428
429 *access = 0;
430 for (i = 1; i < 4; i++) {
431 if (test_bit(i, &bmap))
432 *access |= i;
433 }
434}
435
436static void
437set_deny(unsigned int *deny, unsigned long bmap) {
438 int i;
439
440 *deny = 0;
441 for (i = 0; i < 4; i++) {
442 if (test_bit(i, &bmap))
443 *deny |= i ;
444 }
445}
446
447static int
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400448test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400449 unsigned int access, deny;
450
451 set_access(&access, stp->st_access_bmap);
452 set_deny(&deny, stp->st_deny_bmap);
453 if ((access & open->op_share_deny) || (deny & open->op_share_access))
454 return 0;
455 return 1;
456}
457
458static int nfs4_access_to_omode(u32 access)
459{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400460 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400461 case NFS4_SHARE_ACCESS_READ:
462 return O_RDONLY;
463 case NFS4_SHARE_ACCESS_WRITE:
464 return O_WRONLY;
465 case NFS4_SHARE_ACCESS_BOTH:
466 return O_RDWR;
467 }
468 BUG();
469}
470
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400471static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500472{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500473 list_del(&stp->st_perfile);
474 list_del(&stp->st_perstateowner);
475}
476
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400477static void close_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500478{
J. Bruce Fields499f3ed2011-06-27 16:57:12 -0400479 int i;
J. Bruce Fields0997b172011-03-02 18:01:35 -0500480
J. Bruce Fields23fcf2e2011-03-28 15:15:09 +0800481 if (stp->st_access_bmap) {
J. Bruce Fields499f3ed2011-06-27 16:57:12 -0400482 for (i = 1; i < 4; i++) {
483 if (test_bit(i, &stp->st_access_bmap))
484 nfs4_file_put_access(stp->st_file,
485 nfs4_access_to_omode(i));
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400486 __clear_bit(i, &stp->st_access_bmap);
J. Bruce Fields499f3ed2011-06-27 16:57:12 -0400487 }
J. Bruce Fields23fcf2e2011-03-28 15:15:09 +0800488 }
OGAWA Hirofumia96e5b92011-04-18 11:48:55 -0400489 put_nfs4_file(stp->st_file);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400490 stp->st_file = NULL;
491}
492
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400493static void free_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400494{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500495 kmem_cache_free(stateid_slab, stp);
496}
497
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400498static void release_lock_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500499{
500 struct file *file;
501
502 unhash_generic_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400503 unhash_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500504 file = find_any_file(stp->st_file);
505 if (file)
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400506 locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400507 close_generic_stateid(stp);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500508 free_generic_stateid(stp);
509}
510
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400511static void unhash_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500512{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400513 struct nfs4_ol_stateid *stp;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500514
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400515 list_del(&lo->lo_owner.so_strhash);
516 list_del(&lo->lo_perstateid);
517 while (!list_empty(&lo->lo_owner.so_stateids)) {
518 stp = list_first_entry(&lo->lo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400519 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500520 release_lock_stateid(stp);
521 }
522}
523
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400524static void release_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500525{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400526 unhash_lockowner(lo);
527 nfs4_free_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500528}
529
530static void
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400531release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500532{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400533 struct nfs4_lockowner *lo;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500534
535 while (!list_empty(&open_stp->st_lockowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400536 lo = list_entry(open_stp->st_lockowners.next,
537 struct nfs4_lockowner, lo_perstateid);
538 release_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500539 }
540}
541
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400542static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields22839632009-01-11 14:27:17 -0500543{
544 unhash_generic_stateid(stp);
545 release_stateid_lockowners(stp);
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400546 close_generic_stateid(stp);
547}
548
549static void release_open_stateid(struct nfs4_ol_stateid *stp)
550{
551 unhash_open_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400552 unhash_stid(&stp->st_stid);
J. Bruce Fields22839632009-01-11 14:27:17 -0500553 free_generic_stateid(stp);
554}
555
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400556static void unhash_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500557{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400558 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500559
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400560 list_del(&oo->oo_owner.so_strhash);
561 list_del(&oo->oo_perclient);
562 while (!list_empty(&oo->oo_owner.so_stateids)) {
563 stp = list_first_entry(&oo->oo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400564 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500565 release_open_stateid(stp);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500566 }
567}
568
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400569static void release_last_closed_stateid(struct nfs4_openowner *oo)
570{
571 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
572
573 if (s) {
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400574 unhash_stid(&s->st_stid);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400575 free_generic_stateid(s);
576 oo->oo_last_closed_stid = NULL;
577 }
578}
579
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400580static void release_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500581{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400582 unhash_openowner(oo);
583 list_del(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400584 release_last_closed_stateid(oo);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400585 nfs4_free_openowner(oo);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500586}
587
Marc Eshel5282fd72009-04-03 08:27:52 +0300588#define SESSION_HASH_SIZE 512
589static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
590
591static inline int
592hash_sessionid(struct nfs4_sessionid *sessionid)
593{
594 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
595
596 return sid->sequence % SESSION_HASH_SIZE;
597}
598
599static inline void
600dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
601{
602 u32 *ptr = (u32 *)(&sessionid->data[0]);
603 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
604}
605
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300606static void
607gen_sessionid(struct nfsd4_session *ses)
608{
609 struct nfs4_client *clp = ses->se_client;
610 struct nfsd4_sessionid *sid;
611
612 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
613 sid->clientid = clp->cl_clientid;
614 sid->sequence = current_sessionid++;
615 sid->reserved = 0;
616}
617
618/*
Andy Adamsona6496372009-08-28 08:45:01 -0400619 * The protocol defines ca_maxresponssize_cached to include the size of
620 * the rpc header, but all we need to cache is the data starting after
621 * the end of the initial SEQUENCE operation--the rest we regenerate
622 * each time. Therefore we can advertise a ca_maxresponssize_cached
623 * value that is the number of bytes in our cache plus a few additional
624 * bytes. In order to stay on the safe side, and not promise more than
625 * we can cache, those additional bytes must be the minimum possible: 24
626 * bytes of rpc header (xid through accept state, with AUTH_NULL
627 * verifier), 12 for the compound header (with zero-length tag), and 44
628 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300629 */
Andy Adamsona6496372009-08-28 08:45:01 -0400630#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
631
Andy Adamson557ce262009-08-28 08:45:04 -0400632static void
633free_session_slots(struct nfsd4_session *ses)
634{
635 int i;
636
637 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
638 kfree(ses->se_slots[i]);
639}
640
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400641/*
642 * We don't actually need to cache the rpc and session headers, so we
643 * can allocate a little less for each slot:
644 */
645static inline int slot_bytes(struct nfsd4_channel_attrs *ca)
646{
647 return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
648}
649
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400650static int nfsd4_sanitize_slot_size(u32 size)
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300651{
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400652 size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */
653 size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300654
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400655 return size;
656}
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300657
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400658/*
659 * XXX: If we run out of reserved DRC memory we could (up to a point)
660 * re-negotiate active sessions and reduce their slot usage to make
661 * rooom for new connections. For now we just fail the create session.
662 */
663static int nfsd4_get_drc_mem(int slotsize, u32 num)
664{
665 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300666
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400667 num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION);
Andy Adamson557ce262009-08-28 08:45:04 -0400668
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400669 spin_lock(&nfsd_drc_lock);
670 avail = min_t(int, NFSD_MAX_MEM_PER_SESSION,
671 nfsd_drc_max_mem - nfsd_drc_mem_used);
672 num = min_t(int, num, avail / slotsize);
673 nfsd_drc_mem_used += num * slotsize;
674 spin_unlock(&nfsd_drc_lock);
675
676 return num;
677}
678
679static void nfsd4_put_drc_mem(int slotsize, int num)
680{
681 spin_lock(&nfsd_drc_lock);
682 nfsd_drc_mem_used -= slotsize * num;
683 spin_unlock(&nfsd_drc_lock);
684}
685
686static struct nfsd4_session *alloc_session(int slotsize, int numslots)
687{
688 struct nfsd4_session *new;
689 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300690
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -0400691 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400692 + sizeof(struct nfsd4_session) > PAGE_SIZE);
693 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -0400694
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400695 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300696 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400697 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -0400698 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400699 for (i = 0; i < numslots; i++) {
700 mem = sizeof(struct nfsd4_slot) + slotsize;
701 new->se_slots[i] = kzalloc(mem, GFP_KERNEL);
702 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -0400703 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -0400704 }
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400705 return new;
706out_free:
707 while (i--)
708 kfree(new->se_slots[i]);
709 kfree(new);
710 return NULL;
711}
712
713static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize)
714{
715 u32 maxrpc = nfsd_serv->sv_max_mesg;
716
717 new->maxreqs = numslots;
Mi Jinlongd2b21742011-03-10 17:43:37 +0800718 new->maxresp_cached = min_t(u32, req->maxresp_cached,
719 slotsize + NFSD_MIN_HDR_SEQ_SZ);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400720 new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc);
721 new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc);
722 new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND);
723}
724
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400725static void free_conn(struct nfsd4_conn *c)
726{
727 svc_xprt_put(c->cn_xprt);
728 kfree(c);
729}
730
731static void nfsd4_conn_lost(struct svc_xpt_user *u)
732{
733 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
734 struct nfs4_client *clp = c->cn_session->se_client;
735
736 spin_lock(&clp->cl_lock);
737 if (!list_empty(&c->cn_persession)) {
738 list_del(&c->cn_persession);
739 free_conn(c);
740 }
741 spin_unlock(&clp->cl_lock);
J. Bruce Fieldseea49802010-11-18 08:34:12 -0500742 nfsd4_probe_callback(clp);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400743}
744
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400745static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400746{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400747 struct nfsd4_conn *conn;
748
749 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
750 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400751 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400752 svc_xprt_get(rqstp->rq_xprt);
753 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400754 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400755 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
756 return conn;
757}
758
J. Bruce Fields328ead22010-09-29 16:11:06 -0400759static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
760{
761 conn->cn_session = ses;
762 list_add(&conn->cn_persession, &ses->se_conns);
763}
764
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400765static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
766{
767 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400768
769 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -0400770 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400771 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400772}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400773
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400774static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400775{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400776 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400777 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400778}
779
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400780static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400781{
782 struct nfsd4_conn *conn;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400783 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400784
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400785 conn = alloc_conn(rqstp, dir);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400786 if (!conn)
787 return nfserr_jukebox;
788 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400789 ret = nfsd4_register_conn(conn);
790 if (ret)
791 /* oops; xprt is already down: */
792 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400793 return nfs_ok;
794}
795
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400796static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses)
797{
798 u32 dir = NFS4_CDFC4_FORE;
799
800 if (ses->se_flags & SESSION4_BACK_CHAN)
801 dir |= NFS4_CDFC4_BACK;
802
803 return nfsd4_new_conn(rqstp, ses, dir);
804}
805
806/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400807static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400808{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400809 struct nfs4_client *clp = s->se_client;
810 struct nfsd4_conn *c;
811
812 spin_lock(&clp->cl_lock);
813 while (!list_empty(&s->se_conns)) {
814 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
815 list_del_init(&c->cn_persession);
816 spin_unlock(&clp->cl_lock);
817
818 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
819 free_conn(c);
820
821 spin_lock(&clp->cl_lock);
822 }
823 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400824}
825
826void free_session(struct kref *kref)
827{
828 struct nfsd4_session *ses;
829 int mem;
830
831 ses = container_of(kref, struct nfsd4_session, se_ref);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400832 nfsd4_del_conns(ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400833 spin_lock(&nfsd_drc_lock);
834 mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel);
835 nfsd_drc_mem_used -= mem;
836 spin_unlock(&nfsd_drc_lock);
837 free_session_slots(ses);
838 kfree(ses);
839}
840
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400841static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400842{
843 struct nfsd4_session *new;
844 struct nfsd4_channel_attrs *fchan = &cses->fore_channel;
845 int numslots, slotsize;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400846 int status;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400847 int idx;
848
849 /*
850 * Note decreasing slot size below client's request may
851 * make it difficult for client to function correctly, whereas
852 * decreasing the number of slots will (just?) affect
853 * performance. When short on memory we therefore prefer to
854 * decrease number of slots instead of their size.
855 */
856 slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached);
857 numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs);
Mi Jinlongced6dfe2010-11-11 18:03:50 +0800858 if (numslots < 1)
859 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400860
861 new = alloc_session(slotsize, numslots);
862 if (!new) {
863 nfsd4_put_drc_mem(slotsize, fchan->maxreqs);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400864 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400865 }
866 init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize);
Andy Adamson557ce262009-08-28 08:45:04 -0400867
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300868 new->se_client = clp;
869 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300870
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400871 INIT_LIST_HEAD(&new->se_conns);
872
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400873 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300874 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -0400875 new->se_cb_prog = cses->callback_prog;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300876 kref_init(&new->se_ref);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400877 idx = hash_sessionid(&new->se_sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300878 spin_lock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300879 list_add(&new->se_hash, &sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400880 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300881 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400882 spin_unlock(&clp->cl_lock);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300883 spin_unlock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300884
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400885 status = nfsd4_new_conn_from_crses(rqstp, new);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400886 /* whoops: benny points out, status is ignored! (err, or bogus) */
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400887 if (status) {
888 free_session(&new->se_ref);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400889 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400890 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400891 if (cses->flags & SESSION4_BACK_CHAN) {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400892 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400893 /*
894 * This is a little silly; with sessions there's no real
895 * use for the callback address. Use the peer address
896 * as a reasonable default for now, but consider fixing
897 * the rpc client not to require an address in the
898 * future:
899 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400900 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
901 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400902 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400903 nfsd4_probe_callback(clp);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400904 return new;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300905}
906
Benny Halevy9089f1b2010-05-12 00:12:26 +0300907/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +0300908static struct nfsd4_session *
909find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
910{
911 struct nfsd4_session *elem;
912 int idx;
913
914 dump_sessionid(__func__, sessionid);
915 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +0300916 /* Search in the appropriate list */
917 list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +0300918 if (!memcmp(elem->se_sessionid.data, sessionid->data,
919 NFS4_MAX_SESSIONID_LEN)) {
920 return elem;
921 }
922 }
923
924 dprintk("%s: session not found\n", __func__);
925 return NULL;
926}
927
Benny Halevy9089f1b2010-05-12 00:12:26 +0300928/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +0300929static void
Marc Eshel5282fd72009-04-03 08:27:52 +0300930unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +0300931{
932 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400933 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +0300934 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400935 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +0300936}
937
Benny Halevy36acb662010-05-12 00:13:04 +0300938/* must be called under the client_lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939static inline void
Benny Halevy36acb662010-05-12 00:13:04 +0300940renew_client_locked(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{
Benny Halevy07cd4902010-05-12 00:13:41 +0300942 if (is_client_expired(clp)) {
943 dprintk("%s: client (clientid %08x/%08x) already expired\n",
944 __func__,
945 clp->cl_clientid.cl_boot,
946 clp->cl_clientid.cl_id);
947 return;
948 }
949
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 dprintk("renewing client (clientid %08x/%08x)\n",
951 clp->cl_clientid.cl_boot,
952 clp->cl_clientid.cl_id);
953 list_move_tail(&clp->cl_lru, &client_lru);
954 clp->cl_time = get_seconds();
955}
956
Benny Halevy36acb662010-05-12 00:13:04 +0300957static inline void
958renew_client(struct nfs4_client *clp)
959{
960 spin_lock(&client_lock);
961 renew_client_locked(clp);
962 spin_unlock(&client_lock);
963}
964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
966static int
967STALE_CLIENTID(clientid_t *clid)
968{
969 if (clid->cl_boot == boot_time)
970 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +0300971 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
972 clid->cl_boot, clid->cl_id, boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 return 1;
974}
975
976/*
977 * XXX Should we use a slab cache ?
978 * This type of memory management is somewhat inefficient, but we use it
979 * anyway since SETCLIENTID is not a common operation.
980 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500981static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982{
983 struct nfs4_client *clp;
984
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500985 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
986 if (clp == NULL)
987 return NULL;
988 clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
989 if (clp->cl_name.data == NULL) {
990 kfree(clp);
991 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 }
J. Bruce Fields35bba9a2007-11-21 22:07:08 -0500993 memcpy(clp->cl_name.data, name.data, name.len);
994 clp->cl_name.len = name.len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 return clp;
996}
997
998static inline void
999free_client(struct nfs4_client *clp)
1000{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001001 while (!list_empty(&clp->cl_sessions)) {
1002 struct nfsd4_session *ses;
1003 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1004 se_perclnt);
1005 list_del(&ses->se_perclnt);
1006 nfsd4_put_session(ses);
1007 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 if (clp->cl_cred.cr_group_info)
1009 put_group_info(clp->cl_cred.cr_group_info);
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -05001010 kfree(clp->cl_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 kfree(clp->cl_name.data);
1012 kfree(clp);
1013}
1014
Benny Halevyd7682982010-05-12 00:13:54 +03001015void
1016release_session_client(struct nfsd4_session *session)
1017{
1018 struct nfs4_client *clp = session->se_client;
1019
1020 if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock))
1021 return;
1022 if (is_client_expired(clp)) {
1023 free_client(clp);
1024 session->se_client = NULL;
1025 } else
1026 renew_client_locked(clp);
1027 spin_unlock(&client_lock);
Benny Halevyd7682982010-05-12 00:13:54 +03001028}
1029
Benny Halevy84d38ac2010-05-12 00:13:16 +03001030/* must be called under the client_lock */
1031static inline void
1032unhash_client_locked(struct nfs4_client *clp)
1033{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001034 struct nfsd4_session *ses;
1035
Benny Halevy07cd4902010-05-12 00:13:41 +03001036 mark_client_expired(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001037 list_del(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001038 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001039 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1040 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001041 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001042}
1043
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044static void
1045expire_client(struct nfs4_client *clp)
1046{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001047 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 struct list_head reaplist;
1050
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 INIT_LIST_HEAD(&reaplist);
1052 spin_lock(&recall_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001053 while (!list_empty(&clp->cl_delegations)) {
1054 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
NeilBrownea1da632005-06-23 22:04:17 -07001055 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 list_move(&dp->dl_recall_lru, &reaplist);
1057 }
1058 spin_unlock(&recall_lock);
1059 while (!list_empty(&reaplist)) {
1060 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1061 list_del_init(&dp->dl_recall_lru);
1062 unhash_delegation(dp);
1063 }
NeilBrownea1da632005-06-23 22:04:17 -07001064 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001065 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1066 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 }
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001068 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001069 if (clp->cl_cb_conn.cb_xprt)
1070 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001071 list_del(&clp->cl_idhash);
1072 list_del(&clp->cl_strhash);
1073 spin_lock(&client_lock);
1074 unhash_client_locked(clp);
Benny Halevy46583e22010-05-12 00:13:29 +03001075 if (atomic_read(&clp->cl_refcount) == 0)
1076 free_client(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001077 spin_unlock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078}
1079
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001080static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1081{
1082 memcpy(target->cl_verifier.data, source->data,
1083 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084}
1085
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001086static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1087{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1089 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1090}
1091
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001092static void copy_cred(struct svc_cred *target, struct svc_cred *source)
1093{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 target->cr_uid = source->cr_uid;
1095 target->cr_gid = source->cr_gid;
1096 target->cr_group_info = source->cr_group_info;
1097 get_group_info(target->cr_group_info);
1098}
1099
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001100static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001101{
NeilBrowna55370a2005-06-23 22:03:52 -07001102 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103}
1104
1105static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001106same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1107{
1108 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
1111static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001112same_clid(clientid_t *cl1, clientid_t *cl2)
1113{
1114 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115}
1116
1117/* XXX what about NGROUP */
1118static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001119same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1120{
1121 return cr1->cr_uid == cr2->cr_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122}
1123
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001124static void gen_clid(struct nfs4_client *clp)
1125{
1126 static u32 current_clientid = 1;
1127
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 clp->cl_clientid.cl_boot = boot_time;
1129 clp->cl_clientid.cl_id = current_clientid++;
1130}
1131
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001132static void gen_confirm(struct nfs4_client *clp)
1133{
1134 static u32 i;
1135 u32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 p = (u32 *)clp->cl_confirm.data;
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001138 *p++ = get_seconds();
1139 *p++ = i++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140}
1141
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001142static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001143{
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001144 return idr_find(&cl->cl_stateids, t->si_opaque.so_id);
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001145}
1146
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001147static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001148{
1149 struct nfs4_stid *s;
1150
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001151 s = find_stateid(cl, t);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001152 if (!s)
1153 return NULL;
1154 if (typemask & s->sc_type)
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001155 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04001156 return NULL;
1157}
1158
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001159static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
1160 struct svc_rqst *rqstp, nfs4_verifier *verf)
1161{
1162 struct nfs4_client *clp;
1163 struct sockaddr *sa = svc_addr(rqstp);
1164 char *princ;
1165
1166 clp = alloc_client(name);
1167 if (clp == NULL)
1168 return NULL;
1169
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001170 INIT_LIST_HEAD(&clp->cl_sessions);
1171
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001172 princ = svc_gss_principal(rqstp);
1173 if (princ) {
1174 clp->cl_principal = kstrdup(princ, GFP_KERNEL);
1175 if (clp->cl_principal == NULL) {
1176 free_client(clp);
1177 return NULL;
1178 }
1179 }
1180
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001181 idr_init(&clp->cl_stateids);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001182 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
Benny Halevy46583e22010-05-12 00:13:29 +03001183 atomic_set(&clp->cl_refcount, 0);
J. Bruce Fields77a35692010-04-30 18:51:44 -04001184 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001185 INIT_LIST_HEAD(&clp->cl_idhash);
1186 INIT_LIST_HEAD(&clp->cl_strhash);
1187 INIT_LIST_HEAD(&clp->cl_openowners);
1188 INIT_LIST_HEAD(&clp->cl_delegations);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001189 INIT_LIST_HEAD(&clp->cl_lru);
J. Bruce Fields5ce8ba22011-01-10 16:44:41 -05001190 INIT_LIST_HEAD(&clp->cl_callbacks);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001191 spin_lock_init(&clp->cl_lock);
J. Bruce Fieldscee277d2010-05-26 17:52:14 -04001192 INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc);
Benny Halevy07cd4902010-05-12 00:13:41 +03001193 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001194 clear_bit(0, &clp->cl_cb_slot_busy);
1195 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1196 copy_verf(clp, verf);
1197 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
1198 clp->cl_flavor = rqstp->rq_flavor;
1199 copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1200 gen_confirm(clp);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001201 clp->cl_cb_session = NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001202 return clp;
1203}
1204
NeilBrownfd39ca92005-06-23 22:04:03 -07001205static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
1207{
1208 unsigned int idhashval;
1209
1210 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
1211 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1212 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
Benny Halevy36acb662010-05-12 00:13:04 +03001213 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214}
1215
NeilBrownfd39ca92005-06-23 22:04:03 -07001216static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217move_to_confirmed(struct nfs4_client *clp)
1218{
1219 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1220 unsigned int strhashval;
1221
1222 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Akinobu Mitaf1166292006-06-26 00:24:46 -07001223 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07001224 strhashval = clientstr_hashval(clp->cl_recdir);
Benny Halevy328efba2010-05-12 00:12:51 +03001225 list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 renew_client(clp);
1227}
1228
1229static struct nfs4_client *
1230find_confirmed_client(clientid_t *clid)
1231{
1232 struct nfs4_client *clp;
1233 unsigned int idhashval = clientid_hashval(clid->cl_id);
1234
1235 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001236 if (same_clid(&clp->cl_clientid, clid)) {
1237 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 }
1241 return NULL;
1242}
1243
1244static struct nfs4_client *
1245find_unconfirmed_client(clientid_t *clid)
1246{
1247 struct nfs4_client *clp;
1248 unsigned int idhashval = clientid_hashval(clid->cl_id);
1249
1250 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001251 if (same_clid(&clp->cl_clientid, clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 return clp;
1253 }
1254 return NULL;
1255}
1256
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001257static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001258{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001259 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001260}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001261
NeilBrown28ce6052005-06-23 22:03:56 -07001262static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001263find_confirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001264{
1265 struct nfs4_client *clp;
1266
1267 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001268 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001269 return clp;
1270 }
1271 return NULL;
1272}
1273
1274static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001275find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001276{
1277 struct nfs4_client *clp;
1278
1279 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001280 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001281 return clp;
1282 }
1283 return NULL;
1284}
1285
NeilBrownfd39ca92005-06-23 22:04:03 -07001286static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001287gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288{
J. Bruce Fields07263f12010-05-31 19:09:40 -04001289 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001290 struct sockaddr *sa = svc_addr(rqstp);
1291 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04001292 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293
Jeff Layton7077ecb2009-08-14 12:57:58 -04001294 /* Currently, we only support tcp and tcp6 for the callback channel */
1295 if (se->se_callback_netid_len == 3 &&
1296 !memcmp(se->se_callback_netid_val, "tcp", 3))
1297 expected_family = AF_INET;
1298 else if (se->se_callback_netid_len == 4 &&
1299 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1300 expected_family = AF_INET6;
1301 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 goto out_err;
1303
J. Bruce Fields07263f12010-05-31 19:09:40 -04001304 conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001305 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04001306 (struct sockaddr *)&conn->cb_addr,
1307 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001308
J. Bruce Fields07263f12010-05-31 19:09:40 -04001309 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001311
J. Bruce Fields07263f12010-05-31 19:09:40 -04001312 if (conn->cb_addr.ss_family == AF_INET6)
1313 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04001314
J. Bruce Fields07263f12010-05-31 19:09:40 -04001315 conn->cb_prog = se->se_callback_prog;
1316 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08001317 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 return;
1319out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04001320 conn->cb_addr.ss_family = AF_UNSPEC;
1321 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07001322 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 "will not receive delegations\n",
1324 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1325
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 return;
1327}
1328
Andy Adamson074fe892009-04-03 08:28:15 +03001329/*
Andy Adamson557ce262009-08-28 08:45:04 -04001330 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03001331 */
1332void
1333nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1334{
Andy Adamson557ce262009-08-28 08:45:04 -04001335 struct nfsd4_slot *slot = resp->cstate.slot;
1336 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03001337
Andy Adamson557ce262009-08-28 08:45:04 -04001338 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001339
Andy Adamson557ce262009-08-28 08:45:04 -04001340 slot->sl_opcnt = resp->opcnt;
1341 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001342
1343 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04001344 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001345 return;
1346 }
Andy Adamson557ce262009-08-28 08:45:04 -04001347 slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap;
1348 base = (char *)resp->cstate.datap -
1349 (char *)resp->xbuf->head[0].iov_base;
1350 if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data,
1351 slot->sl_datalen))
1352 WARN("%s: sessions DRC could not cache compound\n", __func__);
1353 return;
Andy Adamson074fe892009-04-03 08:28:15 +03001354}
1355
1356/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04001357 * Encode the replay sequence operation from the slot values.
1358 * If cachethis is FALSE encode the uncached rep error on the next
1359 * operation which sets resp->p and increments resp->opcnt for
1360 * nfs4svc_encode_compoundres.
1361 *
Andy Adamson074fe892009-04-03 08:28:15 +03001362 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04001363static __be32
1364nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1365 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03001366{
Andy Adamsonabfabf82009-07-23 19:02:18 -04001367 struct nfsd4_op *op;
1368 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001369
Andy Adamsonabfabf82009-07-23 19:02:18 -04001370 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__,
Andy Adamson557ce262009-08-28 08:45:04 -04001371 resp->opcnt, resp->cstate.slot->sl_cachethis);
Andy Adamsonabfabf82009-07-23 19:02:18 -04001372
1373 /* Encode the replayed sequence operation */
1374 op = &args->ops[resp->opcnt - 1];
1375 nfsd4_encode_operation(resp, op);
1376
1377 /* Return nfserr_retry_uncached_rep in next operation. */
Andy Adamson557ce262009-08-28 08:45:04 -04001378 if (args->opcnt > 1 && slot->sl_cachethis == 0) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04001379 op = &args->ops[resp->opcnt++];
1380 op->status = nfserr_retry_uncached_rep;
1381 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03001382 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04001383 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03001384}
1385
1386/*
Andy Adamson557ce262009-08-28 08:45:04 -04001387 * The sequence operation is not cached because we can use the slot and
1388 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03001389 */
1390__be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03001391nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1392 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03001393{
Andy Adamson557ce262009-08-28 08:45:04 -04001394 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001395 __be32 status;
1396
Andy Adamson557ce262009-08-28 08:45:04 -04001397 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001398
Andy Adamsonabfabf82009-07-23 19:02:18 -04001399 /* Either returns 0 or nfserr_retry_uncached */
1400 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1401 if (status == nfserr_retry_uncached_rep)
1402 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03001403
Andy Adamson557ce262009-08-28 08:45:04 -04001404 /* The sequence operation has been encoded, cstate->datap set. */
1405 memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen);
Andy Adamson074fe892009-04-03 08:28:15 +03001406
Andy Adamson557ce262009-08-28 08:45:04 -04001407 resp->opcnt = slot->sl_opcnt;
1408 resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen);
1409 status = slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03001410
1411 return status;
1412}
1413
Andy Adamson0733d212009-04-03 08:28:01 +03001414/*
1415 * Set the exchange_id flags returned by the server.
1416 */
1417static void
1418nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1419{
1420 /* pNFS is not supported */
1421 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1422
1423 /* Referrals are supported, Migration is not. */
1424 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1425
1426 /* set the wire flags to return to client. */
1427 clid->flags = new->cl_exchange_flags;
1428}
1429
Al Virob37ad282006-10-19 23:28:59 -07001430__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03001431nfsd4_exchange_id(struct svc_rqst *rqstp,
1432 struct nfsd4_compound_state *cstate,
1433 struct nfsd4_exchange_id *exid)
1434{
Andy Adamson0733d212009-04-03 08:28:01 +03001435 struct nfs4_client *unconf, *conf, *new;
1436 int status;
1437 unsigned int strhashval;
1438 char dname[HEXDIR_LEN];
Jeff Layton363168b2009-08-14 12:57:56 -04001439 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03001440 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04001441 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamson0733d212009-04-03 08:28:01 +03001442
Jeff Layton363168b2009-08-14 12:57:56 -04001443 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03001444 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04001445 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03001446 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04001447 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03001448
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001449 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03001450 return nfserr_inval;
1451
1452 /* Currently only support SP4_NONE */
1453 switch (exid->spa_how) {
1454 case SP4_NONE:
1455 break;
1456 case SP4_SSV:
J. Bruce Fields044bc1d2010-11-12 14:36:06 -05001457 return nfserr_serverfault;
Andy Adamson0733d212009-04-03 08:28:01 +03001458 default:
1459 BUG(); /* checked by xdr code */
1460 case SP4_MACH_CRED:
1461 return nfserr_serverfault; /* no excuse :-/ */
1462 }
1463
1464 status = nfs4_make_rec_clidname(dname, &exid->clname);
1465
1466 if (status)
1467 goto error;
1468
1469 strhashval = clientstr_hashval(dname);
1470
1471 nfs4_lock_state();
1472 status = nfs_ok;
1473
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001474 conf = find_confirmed_client_by_str(dname, strhashval);
Andy Adamson0733d212009-04-03 08:28:01 +03001475 if (conf) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001476 if (!clp_used_exchangeid(conf)) {
1477 status = nfserr_clid_inuse; /* XXX: ? */
1478 goto out;
1479 }
Andy Adamson0733d212009-04-03 08:28:01 +03001480 if (!same_verf(&verf, &conf->cl_verifier)) {
1481 /* 18.35.4 case 8 */
1482 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1483 status = nfserr_not_same;
1484 goto out;
1485 }
1486 /* Client reboot: destroy old state */
1487 expire_client(conf);
1488 goto out_new;
1489 }
1490 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
1491 /* 18.35.4 case 9 */
1492 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1493 status = nfserr_perm;
1494 goto out;
1495 }
1496 expire_client(conf);
1497 goto out_new;
1498 }
Andy Adamson0733d212009-04-03 08:28:01 +03001499 /*
1500 * Set bit when the owner id and verifier map to an already
1501 * confirmed client id (18.35.3).
1502 */
1503 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1504
1505 /*
1506 * Falling into 18.35.4 case 2, possible router replay.
1507 * Leave confirmed record intact and return same result.
1508 */
1509 copy_verf(conf, &verf);
1510 new = conf;
1511 goto out_copy;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001512 }
1513
1514 /* 18.35.4 case 7 */
1515 if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
1516 status = nfserr_noent;
1517 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001518 }
1519
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001520 unconf = find_unconfirmed_client_by_str(dname, strhashval);
Andy Adamson0733d212009-04-03 08:28:01 +03001521 if (unconf) {
1522 /*
1523 * Possible retry or client restart. Per 18.35.4 case 4,
1524 * a new unconfirmed record should be generated regardless
1525 * of whether any properties have changed.
1526 */
1527 expire_client(unconf);
1528 }
1529
1530out_new:
1531 /* Normal case */
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001532 new = create_client(exid->clname, dname, rqstp, &verf);
Andy Adamson0733d212009-04-03 08:28:01 +03001533 if (new == NULL) {
J. Bruce Fields47310302010-06-22 16:17:12 -04001534 status = nfserr_jukebox;
Andy Adamson0733d212009-04-03 08:28:01 +03001535 goto out;
1536 }
1537
Andy Adamson0733d212009-04-03 08:28:01 +03001538 gen_clid(new);
Andy Adamson0733d212009-04-03 08:28:01 +03001539 add_to_unconfirmed(new, strhashval);
1540out_copy:
1541 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1542 exid->clientid.cl_id = new->cl_clientid.cl_id;
1543
Andy Adamson38eb76a2009-04-03 08:28:32 +03001544 exid->seqid = 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001545 nfsd4_set_ex_flags(new, exid);
1546
1547 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001548 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03001549 status = nfs_ok;
1550
1551out:
1552 nfs4_unlock_state();
1553error:
1554 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status));
1555 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001556}
1557
Benny Halevyb85d4c02009-04-03 08:28:08 +03001558static int
Andy Adamson88e588d2009-07-23 19:02:15 -04001559check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001560{
Andy Adamson88e588d2009-07-23 19:02:15 -04001561 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1562 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001563
1564 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04001565 if (slot_inuse) {
1566 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001567 return nfserr_jukebox;
1568 else
1569 return nfserr_seq_misordered;
1570 }
1571 /* Normal */
Andy Adamson88e588d2009-07-23 19:02:15 -04001572 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03001573 return nfs_ok;
1574 /* Replay */
Andy Adamson88e588d2009-07-23 19:02:15 -04001575 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001576 return nfserr_replay_cache;
1577 /* Wraparound */
Andy Adamson88e588d2009-07-23 19:02:15 -04001578 if (seqid == 1 && (slot_seqid + 1) == 0)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001579 return nfs_ok;
1580 /* Misordered replay or misordered new request */
1581 return nfserr_seq_misordered;
1582}
1583
Andy Adamson49557cc2009-07-23 19:02:16 -04001584/*
1585 * Cache the create session result into the create session single DRC
1586 * slot cache by saving the xdr structure. sl_seqid has been set.
1587 * Do this for solo or embedded create session operations.
1588 */
1589static void
1590nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
1591 struct nfsd4_clid_slot *slot, int nfserr)
1592{
1593 slot->sl_status = nfserr;
1594 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1595}
1596
1597static __be32
1598nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1599 struct nfsd4_clid_slot *slot)
1600{
1601 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1602 return slot->sl_status;
1603}
1604
Mi Jinlong1b74c252011-07-14 14:50:17 +08001605#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1606 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1607 1 + /* MIN tag is length with zero, only length */ \
1608 3 + /* version, opcount, opcode */ \
1609 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1610 /* seqid, slotID, slotID, cache */ \
1611 4 ) * sizeof(__be32))
1612
1613#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1614 2 + /* verifier: AUTH_NULL, length 0 */\
1615 1 + /* status */ \
1616 1 + /* MIN tag is length with zero, only length */ \
1617 3 + /* opcount, opcode, opstatus*/ \
1618 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1619 /* seqid, slotID, slotID, slotID, status */ \
1620 5 ) * sizeof(__be32))
1621
1622static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel)
1623{
1624 return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ
1625 || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ;
1626}
1627
Andy Adamson069b6ad2009-04-03 08:27:58 +03001628__be32
1629nfsd4_create_session(struct svc_rqst *rqstp,
1630 struct nfsd4_compound_state *cstate,
1631 struct nfsd4_create_session *cr_ses)
1632{
Jeff Layton363168b2009-08-14 12:57:56 -04001633 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001634 struct nfs4_client *conf, *unconf;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001635 struct nfsd4_session *new;
Andy Adamson49557cc2009-07-23 19:02:16 -04001636 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001637 bool confirm_me = false;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001638 int status = 0;
1639
Mi Jinlonga62573d2011-03-23 17:57:07 +08001640 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
1641 return nfserr_inval;
1642
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001643 nfs4_lock_state();
1644 unconf = find_unconfirmed_client(&cr_ses->clientid);
1645 conf = find_confirmed_client(&cr_ses->clientid);
1646
1647 if (conf) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001648 cs_slot = &conf->cl_cs_slot;
1649 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001650 if (status == nfserr_replay_cache) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001651 dprintk("Got a create_session replay! seqid= %d\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001652 cs_slot->sl_seqid);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001653 /* Return the cached reply status */
Andy Adamson49557cc2009-07-23 19:02:16 -04001654 status = nfsd4_replay_create_session(cr_ses, cs_slot);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001655 goto out;
Andy Adamson49557cc2009-07-23 19:02:16 -04001656 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001657 status = nfserr_seq_misordered;
1658 dprintk("Sequence misordered!\n");
1659 dprintk("Expected seqid= %d but got seqid= %d\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001660 cs_slot->sl_seqid, cr_ses->seqid);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001661 goto out;
1662 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001663 } else if (unconf) {
1664 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04001665 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001666 status = nfserr_clid_inuse;
1667 goto out;
1668 }
1669
Andy Adamson49557cc2009-07-23 19:02:16 -04001670 cs_slot = &unconf->cl_cs_slot;
1671 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001672 if (status) {
1673 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001674 status = nfserr_seq_misordered;
J. Bruce Fieldscd5b8142010-10-02 17:03:35 -04001675 goto out;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001676 }
1677
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001678 confirm_me = true;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001679 conf = unconf;
1680 } else {
1681 status = nfserr_stale_clientid;
1682 goto out;
1683 }
1684
J. Bruce Fields408b79b2010-04-15 15:11:09 -04001685 /*
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04001686 * XXX: we should probably set this at creation time, and check
1687 * for consistent minorversion use throughout:
1688 */
1689 conf->cl_minorversion = 1;
1690 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04001691 * We do not support RDMA or persistent sessions
1692 */
1693 cr_ses->flags &= ~SESSION4_PERSIST;
1694 cr_ses->flags &= ~SESSION4_RDMA;
1695
Mi Jinlong1b74c252011-07-14 14:50:17 +08001696 status = nfserr_toosmall;
1697 if (check_forechannel_attrs(cr_ses->fore_channel))
1698 goto out;
1699
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001700 status = nfserr_jukebox;
1701 new = alloc_init_session(rqstp, conf, cr_ses);
1702 if (!new)
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001703 goto out;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001704 status = nfs_ok;
1705 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001706 NFS4_MAX_SESSIONID_LEN);
Mi Jinlong12050652010-11-11 18:03:40 +08001707 memcpy(&cr_ses->fore_channel, &new->se_fchannel,
1708 sizeof(struct nfsd4_channel_attrs));
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001709 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04001710 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001711
Andy Adamson49557cc2009-07-23 19:02:16 -04001712 /* cache solo and embedded create sessions under the state lock */
1713 nfsd4_cache_create_session(cr_ses, cs_slot, status);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001714 if (confirm_me)
1715 move_to_confirmed(conf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001716out:
1717 nfs4_unlock_state();
1718 dprintk("%s returns %d\n", __func__, ntohl(status));
1719 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001720}
1721
J. Bruce Fields57716352010-04-21 12:27:19 -04001722static bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
1723{
1724 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1725 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1726
1727 return argp->opcnt == resp->opcnt;
1728}
1729
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001730static __be32 nfsd4_map_bcts_dir(u32 *dir)
1731{
1732 switch (*dir) {
1733 case NFS4_CDFC4_FORE:
1734 case NFS4_CDFC4_BACK:
1735 return nfs_ok;
1736 case NFS4_CDFC4_FORE_OR_BOTH:
1737 case NFS4_CDFC4_BACK_OR_BOTH:
1738 *dir = NFS4_CDFC4_BOTH;
1739 return nfs_ok;
1740 };
1741 return nfserr_inval;
1742}
1743
1744__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
1745 struct nfsd4_compound_state *cstate,
1746 struct nfsd4_bind_conn_to_session *bcts)
1747{
1748 __be32 status;
1749
1750 if (!nfsd4_last_compound_op(rqstp))
1751 return nfserr_not_only_op;
1752 spin_lock(&client_lock);
1753 cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid);
1754 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1755 * client_lock iself: */
1756 if (cstate->session) {
1757 nfsd4_get_session(cstate->session);
1758 atomic_inc(&cstate->session->se_client->cl_refcount);
1759 }
1760 spin_unlock(&client_lock);
1761 if (!cstate->session)
1762 return nfserr_badsession;
1763
1764 status = nfsd4_map_bcts_dir(&bcts->dir);
Bryan Schumaker1db2b9d2011-04-27 15:47:15 -04001765 if (!status)
1766 nfsd4_new_conn(rqstp, cstate->session, bcts->dir);
1767 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001768}
1769
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001770static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
1771{
1772 if (!session)
1773 return 0;
1774 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
1775}
1776
Andy Adamson069b6ad2009-04-03 08:27:58 +03001777__be32
1778nfsd4_destroy_session(struct svc_rqst *r,
1779 struct nfsd4_compound_state *cstate,
1780 struct nfsd4_destroy_session *sessionid)
1781{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001782 struct nfsd4_session *ses;
1783 u32 status = nfserr_badsession;
1784
1785 /* Notes:
1786 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1787 * - Should we return nfserr_back_chan_busy if waiting for
1788 * callbacks on to-be-destroyed session?
1789 * - Do we need to clear any callback info from previous session?
1790 */
1791
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001792 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04001793 if (!nfsd4_last_compound_op(r))
1794 return nfserr_not_only_op;
1795 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03001796 dump_sessionid(__func__, &sessionid->sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001797 spin_lock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001798 ses = find_in_sessionid_hashtbl(&sessionid->sessionid);
1799 if (!ses) {
Benny Halevy9089f1b2010-05-12 00:12:26 +03001800 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001801 goto out;
1802 }
1803
1804 unhash_session(ses);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001805 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001806
Benny Halevyab707e152010-05-12 00:14:06 +03001807 nfs4_lock_state();
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05001808 nfsd4_probe_callback_sync(ses->se_client);
Benny Halevyab707e152010-05-12 00:14:06 +03001809 nfs4_unlock_state();
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001810
1811 nfsd4_del_conns(ses);
1812
Benny Halevye10e0cf2009-04-03 08:28:38 +03001813 nfsd4_put_session(ses);
1814 status = nfs_ok;
1815out:
1816 dprintk("%s returns %d\n", __func__, ntohl(status));
1817 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001818}
1819
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001820static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001821{
1822 struct nfsd4_conn *c;
1823
1824 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001825 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04001826 return c;
1827 }
1828 }
1829 return NULL;
1830}
1831
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001832static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001833{
1834 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001835 struct nfsd4_conn *c;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001836 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04001837
1838 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001839 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001840 if (c) {
1841 spin_unlock(&clp->cl_lock);
1842 free_conn(new);
1843 return;
1844 }
1845 __nfsd4_hash_conn(new, ses);
1846 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001847 ret = nfsd4_register_conn(new);
1848 if (ret)
1849 /* oops; xprt is already down: */
1850 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001851 return;
1852}
1853
Mi Jinlong868b89c2011-04-27 09:09:58 +08001854static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
1855{
1856 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1857
1858 return args->opcnt > session->se_fchannel.maxops;
1859}
1860
Mi Jinlongae82a8d2011-07-14 14:56:02 +08001861static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
1862 struct nfsd4_session *session)
1863{
1864 struct xdr_buf *xb = &rqstp->rq_arg;
1865
1866 return xb->len > session->se_fchannel.maxreq_sz;
1867}
1868
Andy Adamson069b6ad2009-04-03 08:27:58 +03001869__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03001870nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03001871 struct nfsd4_compound_state *cstate,
1872 struct nfsd4_sequence *seq)
1873{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001874 struct nfsd4_compoundres *resp = rqstp->rq_resp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001875 struct nfsd4_session *session;
1876 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001877 struct nfsd4_conn *conn;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001878 int status;
1879
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03001880 if (resp->opcnt != 1)
1881 return nfserr_sequence_pos;
1882
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001883 /*
1884 * Will be either used or freed by nfsd4_sequence_check_conn
1885 * below.
1886 */
1887 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
1888 if (!conn)
1889 return nfserr_jukebox;
1890
Benny Halevy9089f1b2010-05-12 00:12:26 +03001891 spin_lock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001892 status = nfserr_badsession;
1893 session = find_in_sessionid_hashtbl(&seq->sessionid);
1894 if (!session)
1895 goto out;
1896
Mi Jinlong868b89c2011-04-27 09:09:58 +08001897 status = nfserr_too_many_ops;
1898 if (nfsd4_session_too_many_ops(rqstp, session))
1899 goto out;
1900
Mi Jinlongae82a8d2011-07-14 14:56:02 +08001901 status = nfserr_req_too_big;
1902 if (nfsd4_request_too_big(rqstp, session))
1903 goto out;
1904
Benny Halevyb85d4c02009-04-03 08:28:08 +03001905 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03001906 if (seq->slotid >= session->se_fchannel.maxreqs)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001907 goto out;
1908
Andy Adamson557ce262009-08-28 08:45:04 -04001909 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03001910 dprintk("%s: slotid %d\n", __func__, seq->slotid);
1911
Andy Adamsona8dfdae2009-08-28 08:45:02 -04001912 /* We do not negotiate the number of slots yet, so set the
1913 * maxslots to the session maxreqs which is used to encode
1914 * sr_highest_slotid and the sr_target_slot id to maxslots */
1915 seq->maxslots = session->se_fchannel.maxreqs;
1916
Andy Adamson88e588d2009-07-23 19:02:15 -04001917 status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001918 if (status == nfserr_replay_cache) {
1919 cstate->slot = slot;
1920 cstate->session = session;
Andy Adamsonda3846a2009-04-03 08:28:22 +03001921 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04001922 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03001923 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03001924 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001925 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001926 }
1927 if (status)
1928 goto out;
1929
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001930 nfsd4_sequence_check_conn(conn, session);
1931 conn = NULL;
J. Bruce Fields328ead22010-09-29 16:11:06 -04001932
Benny Halevyb85d4c02009-04-03 08:28:08 +03001933 /* Success! bump slot seqid */
1934 slot->sl_inuse = true;
1935 slot->sl_seqid = seq->seqid;
Andy Adamson557ce262009-08-28 08:45:04 -04001936 slot->sl_cachethis = seq->cachethis;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001937
1938 cstate->slot = slot;
1939 cstate->session = session;
1940
Benny Halevyb85d4c02009-04-03 08:28:08 +03001941out:
J. Bruce Fields26c0c752010-04-24 15:35:43 -04001942 /* Hold a session reference until done processing the compound. */
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001943 if (cstate->session) {
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05001944 struct nfs4_client *clp = session->se_client;
1945
Benny Halevy36acb662010-05-12 00:13:04 +03001946 nfsd4_get_session(cstate->session);
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05001947 atomic_inc(&clp->cl_refcount);
Benny Halevy54237322011-10-19 19:12:58 -07001948 switch (clp->cl_cb_state) {
1949 case NFSD4_CB_DOWN:
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07001950 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
Benny Halevy54237322011-10-19 19:12:58 -07001951 break;
1952 case NFSD4_CB_FAULT:
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07001953 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
Benny Halevy54237322011-10-19 19:12:58 -07001954 break;
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07001955 default:
1956 seq->status_flags = 0;
Benny Halevy54237322011-10-19 19:12:58 -07001957 }
Benny Halevyaaf84eb2009-08-20 03:21:56 +03001958 }
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001959 kfree(conn);
Benny Halevy36acb662010-05-12 00:13:04 +03001960 spin_unlock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001961 dprintk("%s: return %d\n", __func__, ntohl(status));
1962 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001963}
1964
Mi Jinlong345c2842011-10-20 17:51:39 +08001965static inline bool has_resources(struct nfs4_client *clp)
1966{
1967 return !list_empty(&clp->cl_openowners)
1968 || !list_empty(&clp->cl_delegations)
1969 || !list_empty(&clp->cl_sessions);
1970}
1971
1972__be32
1973nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
1974{
1975 struct nfs4_client *conf, *unconf, *clp;
1976 int status = 0;
1977
1978 nfs4_lock_state();
1979 unconf = find_unconfirmed_client(&dc->clientid);
1980 conf = find_confirmed_client(&dc->clientid);
1981
1982 if (conf) {
1983 clp = conf;
1984
1985 if (!is_client_expired(conf) && has_resources(conf)) {
1986 status = nfserr_clientid_busy;
1987 goto out;
1988 }
1989
1990 /* rfc5661 18.50.3 */
1991 if (cstate->session && conf == cstate->session->se_client) {
1992 status = nfserr_clientid_busy;
1993 goto out;
1994 }
1995 } else if (unconf)
1996 clp = unconf;
1997 else {
1998 status = nfserr_stale_clientid;
1999 goto out;
2000 }
2001
2002 expire_client(clp);
2003out:
2004 nfs4_unlock_state();
2005 dprintk("%s return %d\n", __func__, ntohl(status));
2006 return status;
2007}
2008
Andy Adamson069b6ad2009-04-03 08:27:58 +03002009__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002010nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2011{
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002012 int status = 0;
2013
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002014 if (rc->rca_one_fs) {
2015 if (!cstate->current_fh.fh_dentry)
2016 return nfserr_nofilehandle;
2017 /*
2018 * We don't take advantage of the rca_one_fs case.
2019 * That's OK, it's optional, we can safely ignore it.
2020 */
2021 return nfs_ok;
2022 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002023
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002024 nfs4_lock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002025 status = nfserr_complete_already;
2026 if (cstate->session->se_client->cl_firststate)
2027 goto out;
2028
2029 status = nfserr_stale_clientid;
2030 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002031 /*
2032 * The following error isn't really legal.
2033 * But we only get here if the client just explicitly
2034 * destroyed the client. Surely it no longer cares what
2035 * error it gets back on an operation for the dead
2036 * client.
2037 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002038 goto out;
2039
2040 status = nfs_ok;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002041 nfsd4_create_clid_dir(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002042out:
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002043 nfs4_unlock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002044 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002045}
2046
2047__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002048nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2049 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002051 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 nfs4_verifier clverifier = setclid->se_verf;
2053 unsigned int strhashval;
NeilBrown28ce6052005-06-23 22:03:56 -07002054 struct nfs4_client *conf, *unconf, *new;
Al Virob37ad282006-10-19 23:28:59 -07002055 __be32 status;
NeilBrowna55370a2005-06-23 22:03:52 -07002056 char dname[HEXDIR_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057
NeilBrowna55370a2005-06-23 22:03:52 -07002058 status = nfs4_make_rec_clidname(dname, &clname);
2059 if (status)
Neil Brown73aea4e2005-09-13 01:25:39 -07002060 return status;
NeilBrowna55370a2005-06-23 22:03:52 -07002061
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062 /*
2063 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2064 * We get here on a DRC miss.
2065 */
2066
NeilBrowna55370a2005-06-23 22:03:52 -07002067 strhashval = clientstr_hashval(dname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 nfs4_lock_state();
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002070 conf = find_confirmed_client_by_str(dname, strhashval);
NeilBrown28ce6052005-06-23 22:03:56 -07002071 if (conf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002072 /* RFC 3530 14.2.33 CASE 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002074 if (clp_used_exchangeid(conf))
2075 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04002076 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04002077 char addr_str[INET6_ADDRSTRLEN];
2078 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2079 sizeof(addr_str));
2080 dprintk("NFSD: setclientid: string in use by client "
2081 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 goto out;
2083 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 }
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002085 /*
2086 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2087 * has a description of SETCLIENTID request processing consisting
2088 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2089 */
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002090 unconf = find_unconfirmed_client_by_str(dname, strhashval);
J. Bruce Fields3e772462011-08-10 19:07:33 -04002091 status = nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092 if (!conf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002093 /*
2094 * RFC 3530 14.2.33 CASE 4:
2095 * placed first, because it is the normal case
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 */
2097 if (unconf)
2098 expire_client(unconf);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002099 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07002100 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 gen_clid(new);
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002103 } else if (same_verf(&conf->cl_verifier, &clverifier)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 /*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002105 * RFC 3530 14.2.33 CASE 1:
2106 * probable callback update
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 */
NeilBrown31f4a6c2005-06-23 22:04:06 -07002108 if (unconf) {
2109 /* Note this is removing unconfirmed {*x***},
2110 * which is stronger than RFC recommended {vxc**}.
2111 * This has the advantage that there is at most
2112 * one {*x***} in either list at any time.
2113 */
2114 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115 }
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002116 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07002117 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 copy_clid(new, conf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 } else if (!unconf) {
2121 /*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002122 * RFC 3530 14.2.33 CASE 2:
2123 * probable client reboot; state will be removed if
2124 * confirmed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 */
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002126 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07002127 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 gen_clid(new);
J. Bruce Fields49ba8782007-11-19 19:09:50 -05002130 } else {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002131 /*
2132 * RFC 3530 14.2.33 CASE 3:
2133 * probable client reboot; state will be removed if
2134 * confirmed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 */
2136 expire_client(unconf);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03002137 new = create_client(clname, dname, rqstp, &clverifier);
NeilBrowna55370a2005-06-23 22:03:52 -07002138 if (new == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 gen_clid(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141 }
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002142 /*
2143 * XXX: we should probably set this at creation time, and check
2144 * for consistent minorversion use throughout:
2145 */
2146 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002147 gen_callback(new, setclid, rqstp);
J. Bruce Fieldsc175b832007-08-09 18:34:32 -04002148 add_to_unconfirmed(new, strhashval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2150 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2151 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2152 status = nfs_ok;
2153out:
2154 nfs4_unlock_state();
2155 return status;
2156}
2157
2158
2159/*
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002160 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2161 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2162 * bullets, labeled as CASE1 - CASE4 below.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 */
Al Virob37ad282006-10-19 23:28:59 -07002164__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002165nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2166 struct nfsd4_compound_state *cstate,
2167 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168{
Jeff Layton363168b2009-08-14 12:57:56 -04002169 struct sockaddr *sa = svc_addr(rqstp);
NeilBrown21ab45a2005-06-23 22:04:14 -07002170 struct nfs4_client *conf, *unconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2172 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07002173 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
2175 if (STALE_CLIENTID(clid))
2176 return nfserr_stale_clientid;
2177 /*
2178 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2179 * We get here on a DRC miss.
2180 */
2181
2182 nfs4_lock_state();
NeilBrown21ab45a2005-06-23 22:04:14 -07002183
2184 conf = find_confirmed_client(clid);
2185 unconf = find_unconfirmed_client(clid);
2186
2187 status = nfserr_clid_inuse;
Jeff Layton363168b2009-08-14 12:57:56 -04002188 if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa))
NeilBrown21ab45a2005-06-23 22:04:14 -07002189 goto out;
Jeff Layton363168b2009-08-14 12:57:56 -04002190 if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa))
NeilBrown21ab45a2005-06-23 22:04:14 -07002191 goto out;
2192
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002193 /*
2194 * section 14.2.34 of RFC 3530 has a description of
2195 * SETCLIENTID_CONFIRM request processing consisting
2196 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2197 */
J. Bruce Fields366e0c12007-11-20 15:54:10 -05002198 if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002199 /*
2200 * RFC 3530 14.2.34 CASE 1:
2201 * callback update
2202 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002203 if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 status = nfserr_clid_inuse;
2205 else {
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -04002206 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2207 nfsd4_probe_callback(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002208 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 status = nfs_ok;
NeilBrown1a69c172005-06-23 22:04:08 -07002210
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 }
J. Bruce Fieldsf3aba4e2007-11-20 16:52:07 -05002212 } else if (conf && !unconf) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002213 /*
2214 * RFC 3530 14.2.34 CASE 2:
2215 * probable retransmitted request; play it safe and
2216 * do nothing.
NeilBrown7c79f732005-06-23 22:04:13 -07002217 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002218 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 status = nfserr_clid_inuse;
NeilBrown21ab45a2005-06-23 22:04:14 -07002220 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 status = nfs_ok;
NeilBrown7c79f732005-06-23 22:04:13 -07002222 } else if (!conf && unconf
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002223 && same_verf(&unconf->cl_confirm, &confirm)) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002224 /*
2225 * RFC 3530 14.2.34 CASE 3:
2226 * Normal case; new or rebooted client:
NeilBrown7c79f732005-06-23 22:04:13 -07002227 */
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002228 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 status = nfserr_clid_inuse;
2230 } else {
NeilBrown1a69c172005-06-23 22:04:08 -07002231 unsigned int hash =
2232 clientstr_hashval(unconf->cl_recdir);
2233 conf = find_confirmed_client_by_str(unconf->cl_recdir,
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002234 hash);
NeilBrown1a69c172005-06-23 22:04:08 -07002235 if (conf) {
NeilBrownc7b9a452005-06-23 22:04:30 -07002236 nfsd4_remove_clid_dir(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002237 expire_client(conf);
2238 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 move_to_confirmed(unconf);
NeilBrown21ab45a2005-06-23 22:04:14 -07002240 conf = unconf;
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -04002241 nfsd4_probe_callback(conf);
NeilBrown1a69c172005-06-23 22:04:08 -07002242 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 }
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002244 } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
2245 && (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
NeilBrown7c79f732005-06-23 22:04:13 -07002246 &confirm)))) {
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002247 /*
2248 * RFC 3530 14.2.34 CASE 4:
2249 * Client probably hasn't noticed that we rebooted yet.
NeilBrown7c79f732005-06-23 22:04:13 -07002250 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 status = nfserr_stale_clientid;
NeilBrown7c79f732005-06-23 22:04:13 -07002252 } else {
NeilBrown08e89872005-06-23 22:04:11 -07002253 /* check that we have hit one of the cases...*/
2254 status = nfserr_clid_inuse;
2255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257 nfs4_unlock_state();
2258 return status;
2259}
2260
J. Bruce Fields32513b42011-10-13 16:00:16 -04002261static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262{
J. Bruce Fields32513b42011-10-13 16:00:16 -04002263 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2264}
2265
2266/* OPEN Share state helper functions */
2267static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2268{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 unsigned int hashval = file_hashval(ino);
2270
J. Bruce Fields32513b42011-10-13 16:00:16 -04002271 atomic_set(&fp->fi_ref, 1);
2272 INIT_LIST_HEAD(&fp->fi_hash);
2273 INIT_LIST_HEAD(&fp->fi_stateids);
2274 INIT_LIST_HEAD(&fp->fi_delegations);
2275 fp->fi_inode = igrab(ino);
2276 fp->fi_had_conflict = false;
2277 fp->fi_lease = NULL;
2278 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2279 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2280 spin_lock(&recall_lock);
2281 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
2282 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283}
2284
2285static void
Christoph Lametere18b8902006-12-06 20:33:20 -08002286nfsd4_free_slab(struct kmem_cache **slab)
NeilBrowne60d4392005-06-23 22:03:01 -07002287{
NeilBrowne60d4392005-06-23 22:03:01 -07002288 if (*slab == NULL)
2289 return;
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07002290 kmem_cache_destroy(*slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002291 *slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -07002292}
2293
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04002294void
NeilBrowne60d4392005-06-23 22:03:01 -07002295nfsd4_free_slabs(void)
2296{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002297 nfsd4_free_slab(&openowner_slab);
2298 nfsd4_free_slab(&lockowner_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002299 nfsd4_free_slab(&file_slab);
NeilBrown5ac049a2005-06-23 22:03:03 -07002300 nfsd4_free_slab(&stateid_slab);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002301 nfsd4_free_slab(&deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002302}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303
2304static int
2305nfsd4_init_slabs(void)
2306{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002307 openowner_slab = kmem_cache_create("nfsd4_openowners",
2308 sizeof(struct nfs4_openowner), 0, 0, NULL);
2309 if (openowner_slab == NULL)
2310 goto out_nomem;
2311 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
2312 sizeof(struct nfs4_openowner), 0, 0, NULL);
2313 if (lockowner_slab == NULL)
NeilBrowne60d4392005-06-23 22:03:01 -07002314 goto out_nomem;
2315 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09002316 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002317 if (file_slab == NULL)
2318 goto out_nomem;
NeilBrown5ac049a2005-06-23 22:03:03 -07002319 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002320 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07002321 if (stateid_slab == NULL)
2322 goto out_nomem;
NeilBrown5b2d21c2005-06-23 22:03:04 -07002323 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09002324 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002325 if (deleg_slab == NULL)
2326 goto out_nomem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327 return 0;
NeilBrowne60d4392005-06-23 22:03:01 -07002328out_nomem:
2329 nfsd4_free_slabs();
2330 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2331 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332}
2333
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002334void nfs4_free_openowner(struct nfs4_openowner *oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002336 kfree(oo->oo_owner.so_owner.data);
2337 kmem_cache_free(openowner_slab, oo);
2338}
2339
2340void nfs4_free_lockowner(struct nfs4_lockowner *lo)
2341{
2342 kfree(lo->lo_owner.so_owner.data);
2343 kmem_cache_free(lockowner_slab, lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344}
2345
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002346static void init_nfs4_replay(struct nfs4_replay *rp)
2347{
2348 rp->rp_status = nfserr_serverfault;
2349 rp->rp_buflen = 0;
2350 rp->rp_buf = rp->rp_ibuf;
2351}
2352
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002353static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354{
2355 struct nfs4_stateowner *sop;
2356
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002357 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002358 if (!sop)
2359 return NULL;
2360
2361 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2362 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002363 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002364 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002366 sop->so_owner.len = owner->len;
2367
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002368 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002369 sop->so_client = clp;
2370 init_nfs4_replay(&sop->so_replay);
2371 return sop;
2372}
2373
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002374static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002375{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002376 list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]);
2377 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378}
2379
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002380static struct nfs4_openowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002382 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002384 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2385 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002387 oo->oo_owner.so_is_open_owner = 1;
2388 oo->oo_owner.so_seqid = open->op_seqid;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04002389 oo->oo_flags = NFS4_OO_NEW;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002390 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04002391 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002392 INIT_LIST_HEAD(&oo->oo_close_lru);
2393 hash_openowner(oo, clp, strhashval);
2394 return oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395}
2396
J. Bruce Fields996e0932011-10-17 11:14:48 -04002397static 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 -04002398 struct nfs4_openowner *oo = open->op_openowner;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04002399 struct nfs4_client *clp = oo->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400
J. Bruce Fields996e0932011-10-17 11:14:48 -04002401 init_stid(&stp->st_stid, clp, NFS4_OPEN_STID);
NeilBrownea1da632005-06-23 22:04:17 -07002402 INIT_LIST_HEAD(&stp->st_lockowners);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002403 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
NeilBrown8beefa22005-06-23 22:03:08 -07002404 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002405 stp->st_stateowner = &oo->oo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07002406 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407 stp->st_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002408 stp->st_access_bmap = 0;
2409 stp->st_deny_bmap = 0;
J. Bruce Fieldsb6d2f1c2011-10-10 17:44:19 -04002410 __set_bit(open->op_share_access, &stp->st_access_bmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
NeilBrown4c4cd222005-07-07 17:59:27 -07002412 stp->st_openstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413}
2414
2415static void
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002416move_to_close_lru(struct nfs4_openowner *oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002418 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002420 list_move_tail(&oo->oo_close_lru, &close_lru);
2421 oo->oo_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422}
2423
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002425same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2426 clientid_t *clid)
2427{
2428 return (sop->so_owner.len == owner->len) &&
2429 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2430 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431}
2432
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002433static struct nfs4_openowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
2435{
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002436 struct nfs4_stateowner *so;
2437 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438
J. Bruce Fields506f2752011-08-11 18:50:18 -04002439 list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002440 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2441 oo = openowner(so);
2442 renew_client(oo->oo_owner.so_client);
2443 return oo;
2444 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 }
2446 return NULL;
2447}
2448
2449/* search file_hashtbl[] for file */
2450static struct nfs4_file *
2451find_file(struct inode *ino)
2452{
2453 unsigned int hashval = file_hashval(ino);
2454 struct nfs4_file *fp;
2455
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002456 spin_lock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
NeilBrown13cd2182005-06-23 22:03:10 -07002458 if (fp->fi_inode == ino) {
2459 get_nfs4_file(fp);
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002460 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07002462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002463 }
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002464 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465 return NULL;
2466}
2467
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04002468/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469 * Called to check deny when READ with all zero stateid or
2470 * WRITE with all zero or all one stateid
2471 */
Al Virob37ad282006-10-19 23:28:59 -07002472static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2474{
2475 struct inode *ino = current_fh->fh_dentry->d_inode;
2476 struct nfs4_file *fp;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002477 struct nfs4_ol_stateid *stp;
Al Virob37ad282006-10-19 23:28:59 -07002478 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479
2480 dprintk("NFSD: nfs4_share_conflict\n");
2481
2482 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07002483 if (!fp)
2484 return nfs_ok;
NeilBrownb7009492005-07-07 17:59:23 -07002485 ret = nfserr_locked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 /* Search for conflicting share reservations */
NeilBrown13cd2182005-06-23 22:03:10 -07002487 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
2488 if (test_bit(deny_type, &stp->st_deny_bmap) ||
2489 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
2490 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 }
NeilBrown13cd2182005-06-23 22:03:10 -07002492 ret = nfs_ok;
2493out:
2494 put_nfs4_file(fp);
2495 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496}
2497
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002498static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500 /* We're assuming the state code never drops its reference
2501 * without first removing the lease. Since we're in this lease
2502 * callback (and since the lease code is serialized by the kernel
2503 * lock) we know the server hasn't removed the lease yet, we know
2504 * it's safe to take a reference: */
2505 atomic_inc(&dp->dl_count);
2506
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508
Arnd Bergmann460781b2010-11-17 16:26:56 +01002509 /* only place dl_time is set. protected by lock_flocks*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 dp->dl_time = get_seconds();
2511
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002512 nfsd4_cb_recall(dp);
2513}
2514
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002515/* Called from break_lease() with lock_flocks() held. */
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002516static void nfsd_break_deleg_cb(struct file_lock *fl)
2517{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002518 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
2519 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002520
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002521 BUG_ON(!fp);
2522 /* We assume break_lease is only called once per lease: */
2523 BUG_ON(fp->fi_had_conflict);
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002524 /*
2525 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002526 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002527 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002528 */
2529 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002531 spin_lock(&recall_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002532 fp->fi_had_conflict = true;
2533 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
2534 nfsd_break_one_deleg(dp);
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002535 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536}
2537
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538static
2539int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2540{
2541 if (arg & F_UNLCK)
2542 return lease_modify(onlist, arg);
2543 else
2544 return -EAGAIN;
2545}
2546
Alexey Dobriyan7b021962009-09-21 17:01:12 -07002547static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04002548 .lm_break = nfsd_break_deleg_cb,
2549 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550};
2551
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04002552static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
2553{
2554 if (nfsd4_has_session(cstate))
2555 return nfs_ok;
2556 if (seqid == so->so_seqid - 1)
2557 return nfserr_replay_me;
2558 if (seqid == so->so_seqid)
2559 return nfs_ok;
2560 return nfserr_bad_seqid;
2561}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562
Al Virob37ad282006-10-19 23:28:59 -07002563__be32
Andy Adamson66689582009-04-03 08:28:45 +03002564nfsd4_process_open1(struct nfsd4_compound_state *cstate,
2565 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002566{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 clientid_t *clientid = &open->op_clientid;
2568 struct nfs4_client *clp = NULL;
2569 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002570 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002571 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 if (STALE_CLIENTID(&open->op_clientid))
2574 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04002575 /*
2576 * In case we need it later, after we've already created the
2577 * file and don't want to risk a further failure:
2578 */
2579 open->op_file = nfsd4_alloc_file();
2580 if (open->op_file == NULL)
2581 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582
J. Bruce Fields506f2752011-08-11 18:50:18 -04002583 strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002584 oo = find_openstateowner_str(strhashval, open);
2585 open->op_openowner = oo;
2586 if (!oo) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587 clp = find_confirmed_client(clientid);
2588 if (clp == NULL)
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002589 return nfserr_expired;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002590 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002592 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002593 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002594 clp = oo->oo_owner.so_client;
2595 release_openowner(oo);
2596 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002597 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002598 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002599 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
2600 if (status)
2601 return status;
2602 clp = oo->oo_owner.so_client;
2603 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002604new_owner:
2605 oo = alloc_init_open_stateowner(strhashval, clp, open);
2606 if (oo == NULL)
2607 return nfserr_jukebox;
2608 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002609alloc_stateid:
2610 open->op_stp = nfs4_alloc_stateid(clp);
2611 if (!open->op_stp)
2612 return nfserr_jukebox;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002613 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614}
2615
Al Virob37ad282006-10-19 23:28:59 -07002616static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07002617nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
2618{
2619 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
2620 return nfserr_openmode;
2621 else
2622 return nfs_ok;
2623}
2624
Daniel Mackc47d8322011-05-16 16:38:14 +02002625static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04002626{
2627 share_access &= ~NFS4_SHARE_WANT_MASK;
2628
2629 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
2630}
2631
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002632static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002633{
2634 struct nfs4_stid *ret;
2635
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002636 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002637 if (!ret)
2638 return NULL;
2639 return delegstateid(ret);
2640}
2641
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002642static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
2643{
2644 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
2645 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
2646}
2647
Al Virob37ad282006-10-19 23:28:59 -07002648static __be32
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002649nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07002650 struct nfs4_delegation **dp)
2651{
2652 int flags;
Al Virob37ad282006-10-19 23:28:59 -07002653 __be32 status = nfserr_bad_stateid;
NeilBrown567d9822005-06-23 22:02:53 -07002654
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002655 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
NeilBrown567d9822005-06-23 22:02:53 -07002656 if (*dp == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07002657 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04002658 flags = share_access_to_flags(open->op_share_access);
NeilBrown567d9822005-06-23 22:02:53 -07002659 status = nfs4_check_delegmode(*dp, flags);
2660 if (status)
2661 *dp = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002662out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002663 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07002664 return nfs_ok;
2665 if (status)
2666 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002667 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002668 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07002669}
2670
Al Virob37ad282006-10-19 23:28:59 -07002671static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002672nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002673{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002674 struct nfs4_ol_stateid *local;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002675 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676
NeilBrown8beefa22005-06-23 22:03:08 -07002677 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 /* ignore lock owners */
2679 if (local->st_stateowner->so_is_open_owner == 0)
2680 continue;
2681 /* remember if we have seen this open owner */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002682 if (local->st_stateowner == &oo->oo_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683 *stpp = local;
2684 /* check for conflicting share reservations */
2685 if (!test_share(local, open))
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002686 return nfserr_share_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 }
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002688 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689}
2690
J. Bruce Fields996e0932011-10-17 11:14:48 -04002691static void nfs4_free_stateid(struct nfs4_ol_stateid *s)
2692{
2693 kmem_cache_free(stateid_slab, s);
NeilBrown5ac049a2005-06-23 22:03:03 -07002694}
2695
J. Bruce Fields21fb4012010-07-28 12:21:23 -04002696static inline int nfs4_access_to_access(u32 nfs4_access)
2697{
2698 int flags = 0;
2699
2700 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
2701 flags |= NFSD_MAY_READ;
2702 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
2703 flags |= NFSD_MAY_WRITE;
2704 return flags;
2705}
2706
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002707static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
2708 struct svc_fh *cur_fh, struct nfsd4_open *open)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002709{
2710 __be32 status;
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002711 int oflag = nfs4_access_to_omode(open->op_share_access);
2712 int access = nfs4_access_to_access(open->op_share_access);
2713
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002714 if (!fp->fi_fds[oflag]) {
2715 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
2716 &fp->fi_fds[oflag]);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002717 if (status)
2718 return status;
2719 }
2720 nfs4_file_get_access(fp, oflag);
2721
2722 return nfs_ok;
2723}
2724
Al Virob37ad282006-10-19 23:28:59 -07002725static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
2727 struct nfsd4_open *open)
2728{
2729 struct iattr iattr = {
2730 .ia_valid = ATTR_SIZE,
2731 .ia_size = 0,
2732 };
2733 if (!open->op_truncate)
2734 return 0;
2735 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08002736 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
2738}
2739
Al Virob37ad282006-10-19 23:28:59 -07002740static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002741nfs4_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 -07002742{
J. Bruce Fieldsb6d2f1c2011-10-10 17:44:19 -04002743 u32 op_share_access = open->op_share_access;
J. Bruce Fields7d947842010-08-20 18:09:31 -04002744 bool new_access;
Al Virob37ad282006-10-19 23:28:59 -07002745 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746
J. Bruce Fields7d947842010-08-20 18:09:31 -04002747 new_access = !test_bit(op_share_access, &stp->st_access_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002748 if (new_access) {
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002749 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002750 if (status)
2751 return status;
J. Bruce Fields6c26d082006-01-18 17:43:38 -08002752 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 status = nfsd4_truncate(rqstp, cur_fh, open);
2754 if (status) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002755 if (new_access) {
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04002756 int oflag = nfs4_access_to_omode(op_share_access);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002757 nfs4_file_put_access(fp, oflag);
2758 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002759 return status;
2760 }
2761 /* remember the open */
J. Bruce Fields24a01112010-05-18 20:01:35 -04002762 __set_bit(op_share_access, &stp->st_access_bmap);
J. Bruce Fieldsb55e0ba2008-04-28 18:22:50 -04002763 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764
2765 return nfs_ok;
2766}
2767
2768
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769static void
NeilBrown37515172005-07-07 17:59:16 -07002770nfs4_set_claim_prev(struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771{
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002772 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002773 open->op_openowner->oo_owner.so_client->cl_firststate = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774}
2775
J. Bruce Fields14a24e92010-12-10 19:02:49 -05002776/* Should we give out recallable state?: */
2777static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
2778{
2779 if (clp->cl_cb_state == NFSD4_CB_UP)
2780 return true;
2781 /*
2782 * In the sessions case, since we don't have to establish a
2783 * separate connection for callbacks, we assume it's OK
2784 * until we hear otherwise:
2785 */
2786 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
2787}
2788
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002789static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
2790{
2791 struct file_lock *fl;
2792
2793 fl = locks_alloc_lock();
2794 if (!fl)
2795 return NULL;
2796 locks_init_lock(fl);
2797 fl->fl_lmops = &nfsd_lease_mng_ops;
2798 fl->fl_flags = FL_LEASE;
2799 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
2800 fl->fl_end = OFFSET_MAX;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002801 fl->fl_owner = (fl_owner_t)(dp->dl_file);
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002802 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002803 return fl;
2804}
2805
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002806static int nfs4_setlease(struct nfs4_delegation *dp, int flag)
2807{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002808 struct nfs4_file *fp = dp->dl_file;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002809 struct file_lock *fl;
2810 int status;
2811
2812 fl = nfs4_alloc_init_lease(dp, flag);
2813 if (!fl)
2814 return -ENOMEM;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002815 fl->fl_file = find_readable_file(fp);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -04002816 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002817 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002818 if (status) {
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002819 list_del_init(&dp->dl_perclnt);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002820 locks_free_lock(fl);
2821 return -ENOMEM;
2822 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002823 fp->fi_lease = fl;
2824 fp->fi_deleg_file = fl->fl_file;
2825 get_file(fp->fi_deleg_file);
2826 atomic_set(&fp->fi_delegees, 1);
2827 list_add(&dp->dl_perfile, &fp->fi_delegations);
2828 return 0;
2829}
2830
2831static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag)
2832{
2833 struct nfs4_file *fp = dp->dl_file;
2834
2835 if (!fp->fi_lease)
2836 return nfs4_setlease(dp, flag);
2837 spin_lock(&recall_lock);
2838 if (fp->fi_had_conflict) {
2839 spin_unlock(&recall_lock);
2840 return -EAGAIN;
2841 }
2842 atomic_inc(&fp->fi_delegees);
2843 list_add(&dp->dl_perfile, &fp->fi_delegations);
2844 spin_unlock(&recall_lock);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -04002845 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002846 return 0;
2847}
2848
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849/*
2850 * Attempt to hand out a delegation.
2851 */
2852static void
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002853nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854{
2855 struct nfs4_delegation *dp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002856 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
J. Bruce Fields14a24e92010-12-10 19:02:49 -05002857 int cb_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 int status, flag = 0;
2859
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002860 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861 flag = NFS4_OPEN_DELEGATE_NONE;
NeilBrown7b190fe2005-06-23 22:03:23 -07002862 open->op_recall = 0;
2863 switch (open->op_claim_type) {
2864 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05002865 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07002866 open->op_recall = 1;
2867 flag = open->op_delegate_type;
2868 if (flag == NFS4_OPEN_DELEGATE_NONE)
2869 goto out;
2870 break;
2871 case NFS4_OPEN_CLAIM_NULL:
2872 /* Let's not give out any delegations till everyone's
2873 * had the chance to reclaim theirs.... */
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04002874 if (locks_in_grace())
NeilBrown7b190fe2005-06-23 22:03:23 -07002875 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002876 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown7b190fe2005-06-23 22:03:23 -07002877 goto out;
2878 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
2879 flag = NFS4_OPEN_DELEGATE_WRITE;
2880 else
2881 flag = NFS4_OPEN_DELEGATE_READ;
2882 break;
2883 default:
2884 goto out;
2885 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002887 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002888 if (dp == NULL)
2889 goto out_no_deleg;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002890 status = nfs4_set_delegation(dp, flag);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002891 if (status)
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002892 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04002894 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002896 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04002897 STATEID_VAL(&dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898out:
NeilBrown7b190fe2005-06-23 22:03:23 -07002899 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
2900 && flag == NFS4_OPEN_DELEGATE_NONE
2901 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
J. Bruce Fields2fdada02007-07-27 16:10:37 -04002902 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903 open->op_delegate_type = flag;
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002904 return;
2905out_free:
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002906 nfs4_put_delegation(dp);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002907out_no_deleg:
2908 flag = NFS4_OPEN_DELEGATE_NONE;
2909 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910}
2911
2912/*
2913 * called with nfs4_lock_state() held.
2914 */
Al Virob37ad282006-10-19 23:28:59 -07002915__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
2917{
Andy Adamson66689582009-04-03 08:28:45 +03002918 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002919 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002920 struct nfs4_file *fp = NULL;
2921 struct inode *ino = current_fh->fh_dentry->d_inode;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002922 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07002923 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07002924 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926 /*
2927 * Lookup file; if found, lookup stateid and check open request,
2928 * and check for delegations in the process of being recalled.
2929 * If not found, create the nfs4_file struct
2930 */
2931 fp = find_file(ino);
2932 if (fp) {
2933 if ((status = nfs4_check_open(fp, open, &stp)))
2934 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002935 status = nfs4_check_deleg(cl, fp, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07002936 if (status)
2937 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938 } else {
NeilBrownc44c5ee2005-06-23 22:02:54 -07002939 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002940 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07002941 goto out;
J. Bruce Fields3e772462011-08-10 19:07:33 -04002942 status = nfserr_jukebox;
J. Bruce Fields32513b42011-10-13 16:00:16 -04002943 fp = open->op_file;
2944 open->op_file = NULL;
2945 nfsd4_init_file(fp, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946 }
2947
2948 /*
2949 * OPEN the file, or upgrade an existing OPEN.
2950 * If truncate fails, the OPEN fails.
2951 */
2952 if (stp) {
2953 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002954 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955 if (status)
2956 goto out;
2957 } else {
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002958 status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
NeilBrown567d9822005-06-23 22:02:53 -07002959 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960 goto out;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002961 stp = open->op_stp;
2962 open->op_stp = NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04002963 init_open_stateid(stp, fp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002964 status = nfsd4_truncate(rqstp, current_fh, open);
2965 if (status) {
J. Bruce Fields22839632009-01-11 14:27:17 -05002966 release_open_stateid(stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002967 goto out;
2968 }
2969 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002970 update_stateid(&stp->st_stid.sc_stateid);
2971 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002972
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002973 if (nfsd4_has_session(&resp->cstate))
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002974 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Andy Adamson66689582009-04-03 08:28:45 +03002975
Linus Torvalds1da177e2005-04-16 15:20:36 -07002976 /*
2977 * Attempt to hand out a delegation. No error return, because the
2978 * OPEN succeeds even if we fail.
2979 */
2980 nfs4_open_delegation(current_fh, open, stp);
2981
2982 status = nfs_ok;
2983
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002984 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002985 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986out:
NeilBrown13cd2182005-06-23 22:03:10 -07002987 if (fp)
2988 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07002989 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
2990 nfs4_set_claim_prev(open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 /*
2992 * To finish the open response, we just need to set the rflags.
2993 */
2994 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002995 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03002996 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
2998
2999 return status;
3000}
3001
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003002void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3003{
3004 if (open->op_openowner) {
3005 struct nfs4_openowner *oo = open->op_openowner;
3006
3007 if (!list_empty(&oo->oo_owner.so_stateids))
3008 list_del_init(&oo->oo_close_lru);
3009 if (oo->oo_flags & NFS4_OO_NEW) {
3010 if (status) {
3011 release_openowner(oo);
3012 open->op_openowner = NULL;
3013 } else
3014 oo->oo_flags &= ~NFS4_OO_NEW;
3015 }
3016 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04003017 if (open->op_file)
3018 nfsd4_free_file(open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003019 if (open->op_stp)
3020 nfs4_free_stateid(open->op_stp);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003021}
3022
Al Virob37ad282006-10-19 23:28:59 -07003023__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003024nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3025 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026{
3027 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07003028 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029
3030 nfs4_lock_state();
3031 dprintk("process_renew(%08x/%08x): starting\n",
3032 clid->cl_boot, clid->cl_id);
3033 status = nfserr_stale_clientid;
3034 if (STALE_CLIENTID(clid))
3035 goto out;
3036 clp = find_confirmed_client(clid);
3037 status = nfserr_expired;
3038 if (clp == NULL) {
3039 /* We assume the client took too long to RENEW. */
3040 dprintk("nfsd4_renew: clientid not found!\n");
3041 goto out;
3042 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07003044 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04003045 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 goto out;
3047 status = nfs_ok;
3048out:
3049 nfs4_unlock_state();
3050 return status;
3051}
3052
Daniel Mackc47d8322011-05-16 16:38:14 +02003053static struct lock_manager nfsd4_manager = {
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003054};
3055
NeilBrowna76b4312005-06-23 22:04:01 -07003056static void
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003057nfsd4_end_grace(void)
NeilBrowna76b4312005-06-23 22:04:01 -07003058{
3059 dprintk("NFSD: end of grace period\n");
NeilBrownc7b9a452005-06-23 22:04:30 -07003060 nfsd4_recdir_purge_old();
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003061 locks_end_grace(&nfsd4_manager);
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05003062 /*
3063 * Now that every NFSv4 client has had the chance to recover and
3064 * to see the (possibly new, possibly shorter) lease time, we
3065 * can safely set the next grace time to the current lease time:
3066 */
3067 nfsd4_grace = nfsd4_lease;
NeilBrowna76b4312005-06-23 22:04:01 -07003068}
3069
NeilBrownfd39ca92005-06-23 22:04:03 -07003070static time_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071nfs4_laundromat(void)
3072{
3073 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003074 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003075 struct nfs4_delegation *dp;
3076 struct list_head *pos, *next, reaplist;
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05003077 time_t cutoff = get_seconds() - nfsd4_lease;
3078 time_t t, clientid_val = nfsd4_lease;
3079 time_t u, test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003080
3081 nfs4_lock_state();
3082
3083 dprintk("NFSD: laundromat service - starting\n");
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003084 if (locks_in_grace())
3085 nfsd4_end_grace();
Benny Halevy36acb662010-05-12 00:13:04 +03003086 INIT_LIST_HEAD(&reaplist);
3087 spin_lock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088 list_for_each_safe(pos, next, &client_lru) {
3089 clp = list_entry(pos, struct nfs4_client, cl_lru);
3090 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3091 t = clp->cl_time - cutoff;
3092 if (clientid_val > t)
3093 clientid_val = t;
3094 break;
3095 }
Benny Halevyd7682982010-05-12 00:13:54 +03003096 if (atomic_read(&clp->cl_refcount)) {
3097 dprintk("NFSD: client in use (clientid %08x)\n",
3098 clp->cl_clientid.cl_id);
3099 continue;
3100 }
3101 unhash_client_locked(clp);
3102 list_add(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03003103 }
3104 spin_unlock(&client_lock);
3105 list_for_each_safe(pos, next, &reaplist) {
3106 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003107 dprintk("NFSD: purging unused client (clientid %08x)\n",
3108 clp->cl_clientid.cl_id);
NeilBrownc7b9a452005-06-23 22:04:30 -07003109 nfsd4_remove_clid_dir(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110 expire_client(clp);
3111 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112 spin_lock(&recall_lock);
3113 list_for_each_safe(pos, next, &del_recall_lru) {
3114 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3115 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3116 u = dp->dl_time - cutoff;
3117 if (test_val > u)
3118 test_val = u;
3119 break;
3120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121 list_move(&dp->dl_recall_lru, &reaplist);
3122 }
3123 spin_unlock(&recall_lock);
3124 list_for_each_safe(pos, next, &reaplist) {
3125 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3126 list_del_init(&dp->dl_recall_lru);
3127 unhash_delegation(dp);
3128 }
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05003129 test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 list_for_each_safe(pos, next, &close_lru) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003131 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3132 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3133 u = oo->oo_time - cutoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134 if (test_val > u)
3135 test_val = u;
3136 break;
3137 }
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003138 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 }
3140 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
3141 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
3142 nfs4_unlock_state();
3143 return clientid_val;
3144}
3145
Harvey Harrisona254b242008-02-20 12:49:00 -08003146static struct workqueue_struct *laundry_wq;
3147static void laundromat_main(struct work_struct *);
3148static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
3149
3150static void
David Howellsc4028952006-11-22 14:57:56 +00003151laundromat_main(struct work_struct *not_used)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003152{
3153 time_t t;
3154
3155 t = nfs4_laundromat();
3156 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
NeilBrown58da2822005-06-23 22:03:19 -07003157 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003158}
3159
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003160static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07003161{
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003162 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3163 return nfserr_bad_stateid;
3164 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165}
3166
3167static int
3168STALE_STATEID(stateid_t *stateid)
3169{
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04003170 if (stateid->si_opaque.so_clid.cl_boot == boot_time)
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003171 return 0;
3172 dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003173 STATEID_VAL(stateid));
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003174 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003175}
3176
3177static inline int
3178access_permit_read(unsigned long access_bmap)
3179{
3180 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
3181 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
3182 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
3183}
3184
3185static inline int
3186access_permit_write(unsigned long access_bmap)
3187{
3188 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
3189 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
3190}
3191
3192static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003193__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194{
Al Virob37ad282006-10-19 23:28:59 -07003195 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196
J. Bruce Fields02921912010-07-29 15:16:59 -04003197 /* For lock stateid's, we test the parent open, not the lock: */
3198 if (stp->st_openstp)
3199 stp = stp->st_openstp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
3201 goto out;
3202 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
3203 goto out;
3204 status = nfs_ok;
3205out:
3206 return status;
3207}
3208
Al Virob37ad282006-10-19 23:28:59 -07003209static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
3211{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003212 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003213 return nfs_ok;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003214 else if (locks_in_grace()) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003215 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216 * conflicting state; so we must wait out the grace period. */
3217 return nfserr_grace;
3218 } else if (flags & WR_STATE)
3219 return nfs4_share_conflict(current_fh,
3220 NFS4_SHARE_DENY_WRITE);
3221 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3222 return nfs4_share_conflict(current_fh,
3223 NFS4_SHARE_DENY_READ);
3224}
3225
3226/*
3227 * Allow READ/WRITE during grace period on recovered state only for files
3228 * that are not able to provide mandatory locking.
3229 */
3230static inline int
J. Bruce Fields18f82732009-02-21 15:23:01 -08003231grace_disallows_io(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003233 return locks_in_grace() && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234}
3235
J. Bruce Fields81b82962011-08-23 11:03:29 -04003236/* Returns true iff a is later than b: */
3237static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3238{
3239 return (s32)a->si_generation - (s32)b->si_generation > 0;
3240}
3241
J. Bruce Fields28dde242011-08-22 10:07:12 -04003242static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05003243{
Andy Adamson66689582009-04-03 08:28:45 +03003244 /*
3245 * When sessions are used the stateid generation number is ignored
3246 * when it is zero.
3247 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04003248 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04003249 return nfs_ok;
3250
3251 if (in->si_generation == ref->si_generation)
3252 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03003253
J. Bruce Fields0836f582008-01-26 19:08:12 -05003254 /* If the client sends us a stateid from the future, it's buggy: */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003255 if (stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05003256 return nfserr_bad_stateid;
3257 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04003258 * However, we could see a stateid from the past, even from a
3259 * non-buggy client. For example, if the client sends a lock
3260 * while some IO is outstanding, the lock may bump si_generation
3261 * while the IO is still in flight. The client could avoid that
3262 * situation by waiting for responses on all the IO requests,
3263 * but better performance may result in retrying IO that
3264 * receives an old_stateid error if requests are rarely
3265 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05003266 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003267 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05003268}
3269
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003270__be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04003271{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003272 struct nfs4_stid *s;
3273 struct nfs4_ol_stateid *ols;
3274 __be32 status;
Bryan Schumaker17456802011-07-13 10:50:48 -04003275
3276 if (STALE_STATEID(stateid))
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003277 return nfserr_stale_stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04003278
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003279 s = find_stateid(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003280 if (!s)
3281 return nfserr_stale_stateid;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04003282 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04003283 if (status)
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003284 return status;
3285 if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID)))
3286 return nfs_ok;
3287 ols = openlockstateid(s);
3288 if (ols->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003289 && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003290 return nfserr_bad_stateid;
3291 return nfs_ok;
Bryan Schumaker17456802011-07-13 10:50:48 -04003292}
3293
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003294static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s)
3295{
3296 struct nfs4_client *cl;
3297
3298 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3299 return nfserr_bad_stateid;
3300 if (STALE_STATEID(stateid))
3301 return nfserr_stale_stateid;
3302 cl = find_confirmed_client(&stateid->si_opaque.so_clid);
3303 if (!cl)
3304 return nfserr_expired;
3305 *s = find_stateid_by_type(cl, stateid, typemask);
3306 if (!*s)
3307 return nfserr_bad_stateid;
3308 return nfs_ok;
3309
3310}
3311
Linus Torvalds1da177e2005-04-16 15:20:36 -07003312/*
3313* Checks for stateid operations
3314*/
Al Virob37ad282006-10-19 23:28:59 -07003315__be32
Benny Halevydd453df2009-04-03 08:28:41 +03003316nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
3317 stateid_t *stateid, int flags, struct file **filpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003318{
J. Bruce Fields69064a22011-09-09 11:54:57 -04003319 struct nfs4_stid *s;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003320 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321 struct nfs4_delegation *dp = NULL;
Benny Halevydd453df2009-04-03 08:28:41 +03003322 struct svc_fh *current_fh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003323 struct inode *ino = current_fh->fh_dentry->d_inode;
Al Virob37ad282006-10-19 23:28:59 -07003324 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325
Linus Torvalds1da177e2005-04-16 15:20:36 -07003326 if (filpp)
3327 *filpp = NULL;
3328
J. Bruce Fields18f82732009-02-21 15:23:01 -08003329 if (grace_disallows_io(ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003330 return nfserr_grace;
3331
3332 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3333 return check_special_stateids(current_fh, stateid, flags);
3334
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003335 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s);
3336 if (status)
3337 return status;
J. Bruce Fields69064a22011-09-09 11:54:57 -04003338 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
3339 if (status)
3340 goto out;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003341 switch (s->sc_type) {
3342 case NFS4_DELEG_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003343 dp = delegstateid(s);
J. Bruce Fieldsdc9bf702009-02-21 11:14:43 -08003344 status = nfs4_check_delegmode(dp, flags);
3345 if (status)
3346 goto out;
Dan Carpenter43b01782010-10-27 23:19:04 +02003347 if (filpp) {
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003348 *filpp = dp->dl_file->fi_deleg_file;
Dan Carpenter43b01782010-10-27 23:19:04 +02003349 BUG_ON(!*filpp);
3350 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003351 break;
3352 case NFS4_OPEN_STID:
3353 case NFS4_LOCK_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003354 stp = openlockstateid(s);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003355 status = nfs4_check_fh(current_fh, stp);
3356 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003358 if (stp->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003359 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003360 goto out;
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003361 status = nfs4_check_openmode(stp, flags);
3362 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003364 if (filpp) {
3365 if (flags & RD_STATE)
3366 *filpp = find_readable_file(stp->st_file);
3367 else
3368 *filpp = find_writeable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003369 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003370 break;
3371 default:
3372 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 }
3374 status = nfs_ok;
3375out:
3376 return status;
3377}
3378
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003379static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003380nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003381{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003382 if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner)))
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003383 return nfserr_locks_held;
3384 release_lock_stateid(stp);
3385 return nfs_ok;
3386}
3387
3388/*
Bryan Schumaker17456802011-07-13 10:50:48 -04003389 * Test if the stateid is valid
3390 */
3391__be32
3392nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3393 struct nfsd4_test_stateid *test_stateid)
3394{
J. Bruce Fields36279ac2011-09-26 12:53:00 -04003395 /* real work is done during encoding */
Bryan Schumaker17456802011-07-13 10:50:48 -04003396 return nfs_ok;
3397}
3398
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003399__be32
3400nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3401 struct nfsd4_free_stateid *free_stateid)
3402{
3403 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003404 struct nfs4_stid *s;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003405 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003406 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003407
3408 nfs4_lock_state();
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003409 s = find_stateid(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003410 if (!s)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003411 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003412 switch (s->sc_type) {
3413 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003414 ret = nfserr_locks_held;
3415 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003416 case NFS4_OPEN_STID:
3417 case NFS4_LOCK_STID:
3418 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
3419 if (ret)
3420 goto out;
3421 if (s->sc_type == NFS4_LOCK_STID)
3422 ret = nfsd4_free_lock_stateid(openlockstateid(s));
3423 else
3424 ret = nfserr_locks_held;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003425 break;
3426 default:
3427 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003428 }
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003429out:
3430 nfs4_unlock_state();
3431 return ret;
3432}
3433
NeilBrown4c4cd222005-07-07 17:59:27 -07003434static inline int
3435setlkflg (int type)
3436{
3437 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
3438 RD_STATE : WR_STATE;
3439}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003441static __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 -04003442{
3443 struct svc_fh *current_fh = &cstate->current_fh;
3444 struct nfs4_stateowner *sop = stp->st_stateowner;
3445 __be32 status;
3446
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003447 status = nfsd4_check_seqid(cstate, sop, seqid);
3448 if (status)
3449 return status;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003450 if (stp->st_stid.sc_type == NFS4_CLOSED_STID)
3451 /*
3452 * "Closed" stateid's exist *only* to return
3453 * nfserr_replay_me from the previous step.
3454 */
3455 return nfserr_bad_stateid;
3456 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
3457 if (status)
3458 return status;
3459 return nfs4_check_fh(current_fh, stp);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003460}
3461
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462/*
3463 * Checks for sequence id mutating operations.
3464 */
Al Virob37ad282006-10-19 23:28:59 -07003465static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03003466nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003467 stateid_t *stateid, char typemask,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003468 struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469{
J. Bruce Fields0836f582008-01-26 19:08:12 -05003470 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003471 struct nfs4_stid *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003472
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003473 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
3474 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07003475
Linus Torvalds1da177e2005-04-16 15:20:36 -07003476 *stpp = NULL;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003477 status = nfsd4_lookup_stateid(stateid, typemask, &s);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003478 if (status)
3479 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003480 *stpp = openlockstateid(s);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003481 cstate->replay_owner = (*stpp)->st_stateowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003482
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003483 return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
3484}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05003485
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003486static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003487{
3488 __be32 status;
3489 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003491 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003492 NFS4_OPEN_STID, stpp);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003493 if (status)
3494 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003495 oo = openowner((*stpp)->st_stateowner);
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003496 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown3a4f98b2005-07-07 17:59:26 -07003497 return nfserr_bad_stateid;
NeilBrown3a4f98b2005-07-07 17:59:26 -07003498 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003499}
3500
Al Virob37ad282006-10-19 23:28:59 -07003501__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003502nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003503 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504{
Al Virob37ad282006-10-19 23:28:59 -07003505 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003506 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003507 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003508
3509 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003510 (int)cstate->current_fh.fh_dentry->d_name.len,
3511 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003512
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003513 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07003514 if (status)
3515 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003516
3517 nfs4_lock_state();
3518
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003519 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003520 oc->oc_seqid, &oc->oc_req_stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003521 NFS4_OPEN_STID, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003522 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003523 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003524 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003525 status = nfserr_bad_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003526 if (oo->oo_flags & NFS4_OO_CONFIRMED)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003527 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003528 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003529 update_stateid(&stp->st_stid.sc_stateid);
3530 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003531 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003532 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07003533
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003534 nfsd4_create_clid_dir(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003535 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003536out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003537 if (!cstate->replay_owner)
3538 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003539 return status;
3540}
3541
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003542static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003543{
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003544 if (!test_bit(access, &stp->st_access_bmap))
3545 return;
3546 nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
3547 __clear_bit(access, &stp->st_access_bmap);
3548}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003549
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003550static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
3551{
3552 switch (to_access) {
3553 case NFS4_SHARE_ACCESS_READ:
3554 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
3555 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3556 break;
3557 case NFS4_SHARE_ACCESS_WRITE:
3558 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
3559 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3560 break;
3561 case NFS4_SHARE_ACCESS_BOTH:
3562 break;
3563 default:
3564 BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003565 }
3566}
3567
3568static void
3569reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
3570{
3571 int i;
3572 for (i = 0; i < 4; i++) {
3573 if ((i & deny) != i)
3574 __clear_bit(i, bmap);
3575 }
3576}
3577
Al Virob37ad282006-10-19 23:28:59 -07003578__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003579nfsd4_open_downgrade(struct svc_rqst *rqstp,
3580 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003581 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582{
Al Virob37ad282006-10-19 23:28:59 -07003583 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003584 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003585
3586 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003587 (int)cstate->current_fh.fh_dentry->d_name.len,
3588 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003589
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04003590 /* We don't yet support WANT bits: */
3591 od->od_share_access &= NFS4_SHARE_ACCESS_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003592
3593 nfs4_lock_state();
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003594 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
3595 &od->od_stateid, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003596 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003597 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003598 status = nfserr_inval;
3599 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
3600 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3601 stp->st_access_bmap, od->od_share_access);
3602 goto out;
3603 }
3604 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
3605 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3606 stp->st_deny_bmap, od->od_share_deny);
3607 goto out;
3608 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003609 nfs4_stateid_downgrade(stp, od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003610
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
3612
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003613 update_stateid(&stp->st_stid.sc_stateid);
3614 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615 status = nfs_ok;
3616out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003617 if (!cstate->replay_owner)
3618 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003619 return status;
3620}
3621
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003622void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so)
3623{
3624 struct nfs4_openowner *oo;
3625 struct nfs4_ol_stateid *s;
3626
3627 if (!so->so_is_open_owner)
3628 return;
3629 oo = openowner(so);
3630 s = oo->oo_last_closed_stid;
3631 if (!s)
3632 return;
3633 if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) {
3634 /* Release the last_closed_stid on the next seqid bump: */
3635 oo->oo_flags |= NFS4_OO_PURGE_CLOSE;
3636 return;
3637 }
3638 oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003639 release_last_closed_stateid(oo);
3640}
3641
3642static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
3643{
3644 unhash_open_stateid(s);
3645 s->st_stid.sc_type = NFS4_CLOSED_STID;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003646}
3647
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648/*
3649 * nfs4_unlock_state() called after encode
3650 */
Al Virob37ad282006-10-19 23:28:59 -07003651__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003652nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003653 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003654{
Al Virob37ad282006-10-19 23:28:59 -07003655 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003656 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003657 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003658
3659 dprintk("NFSD: nfsd4_close on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003660 (int)cstate->current_fh.fh_dentry->d_name.len,
3661 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003662
3663 nfs4_lock_state();
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003664 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
3665 &close->cl_stateid,
3666 NFS4_OPEN_STID|NFS4_CLOSED_STID,
3667 &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003668 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003670 oo = openowner(stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003671 status = nfs_ok;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003672 update_stateid(&stp->st_stid.sc_stateid);
3673 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003675 nfsd4_close_open_stateid(stp);
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003676 oo->oo_last_closed_stid = stp;
J. Bruce Fields04ef5952006-01-18 17:43:21 -08003677
3678 /* place unused nfs4_stateowners on so_close_lru list to be
3679 * released by the laundromat service after the lease period
3680 * to enable us to handle CLOSE replay
3681 */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003682 if (list_empty(&oo->oo_owner.so_stateids))
3683 move_to_close_lru(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003684out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003685 if (!cstate->replay_owner)
3686 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003687 return status;
3688}
3689
Al Virob37ad282006-10-19 23:28:59 -07003690__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003691nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3692 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003693{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003694 struct nfs4_delegation *dp;
3695 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003696 struct nfs4_stid *s;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003697 struct inode *inode;
Al Virob37ad282006-10-19 23:28:59 -07003698 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003700 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003701 return status;
3702 inode = cstate->current_fh.fh_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703
3704 nfs4_lock_state();
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003705 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s);
3706 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003707 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003708 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003709 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003710 if (status)
3711 goto out;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003712
3713 unhash_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714out:
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003715 nfs4_unlock_state();
3716
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717 return status;
3718}
3719
3720
3721/*
3722 * Lock owner state (byte-range locks)
3723 */
3724#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3725#define LOCK_HASH_BITS 8
3726#define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3727#define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3728
Benny Halevy87df4de2008-12-15 19:42:03 +02003729static inline u64
3730end_offset(u64 start, u64 len)
3731{
3732 u64 end;
3733
3734 end = start + len;
3735 return end >= start ? end: NFS4_MAX_UINT64;
3736}
3737
3738/* last octet in a range */
3739static inline u64
3740last_byte_offset(u64 start, u64 len)
3741{
3742 u64 end;
3743
3744 BUG_ON(!len);
3745 end = start + len;
3746 return end > start ? end - 1: NFS4_MAX_UINT64;
3747}
3748
Linus Torvalds1da177e2005-04-16 15:20:36 -07003749static inline unsigned int
3750lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
3751 struct xdr_netobj *ownername)
3752{
3753 return (file_hashval(inode) + cl_id
3754 + opaque_hashval(ownername->data, ownername->len))
3755 & LOCK_HASH_MASK;
3756}
3757
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759
Linus Torvalds1da177e2005-04-16 15:20:36 -07003760/*
3761 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3762 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3763 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3764 * locking, this prevents us from being completely protocol-compliant. The
3765 * real solution to this problem is to start using unsigned file offsets in
3766 * the VFS, but this is a very deep change!
3767 */
3768static inline void
3769nfs4_transform_lock_offset(struct file_lock *lock)
3770{
3771 if (lock->fl_start < 0)
3772 lock->fl_start = OFFSET_MAX;
3773 if (lock->fl_end < 0)
3774 lock->fl_end = OFFSET_MAX;
3775}
3776
NeilBrownd5b90262006-04-10 22:55:22 -07003777/* Hack!: For now, we're defining this just so we can use a pointer to it
3778 * as a unique cookie to identify our (NFSv4's) posix locks. */
Alexey Dobriyan7b021962009-09-21 17:01:12 -07003779static const struct lock_manager_operations nfsd_posix_mng_ops = {
NeilBrownd5b90262006-04-10 22:55:22 -07003780};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781
3782static inline void
3783nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
3784{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003785 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003786
NeilBrownd5b90262006-04-10 22:55:22 -07003787 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003788 lo = (struct nfs4_lockowner *) fl->fl_owner;
3789 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
3790 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003791 if (!deny->ld_owner.data)
3792 /* We just don't care that much */
3793 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003794 deny->ld_owner.len = lo->lo_owner.so_owner.len;
3795 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07003796 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003797nevermind:
3798 deny->ld_owner.len = 0;
3799 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07003800 deny->ld_clientid.cl_boot = 0;
3801 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802 }
3803 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02003804 deny->ld_length = NFS4_MAX_UINT64;
3805 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806 deny->ld_length = fl->fl_end - fl->fl_start + 1;
3807 deny->ld_type = NFS4_READ_LT;
3808 if (fl->fl_type != F_RDLCK)
3809 deny->ld_type = NFS4_WRITE_LT;
3810}
3811
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003812static struct nfs4_lockowner *
3813find_lockowner_str(struct inode *inode, clientid_t *clid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003814 struct xdr_netobj *owner)
3815{
3816 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
3817 struct nfs4_stateowner *op;
3818
3819 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04003820 if (same_owner_str(op, owner, clid))
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003821 return lockowner(op);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822 }
3823 return NULL;
3824}
3825
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003826static 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 -04003827{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003828 list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]);
3829 list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003830}
3831
Linus Torvalds1da177e2005-04-16 15:20:36 -07003832/*
3833 * Alloc a lock owner structure.
3834 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003835 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003836 *
3837 * strhashval = lock_ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07003838 */
3839
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003840static struct nfs4_lockowner *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003841alloc_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 -04003842 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003843
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003844 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
3845 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003846 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003847 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
3848 lo->lo_owner.so_is_open_owner = 0;
Neil Brownb59e3c02005-09-13 01:25:38 -07003849 /* It is the openowner seqid that will be incremented in encode in the
3850 * case of new lockowners; so increment the lock seqid manually: */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003851 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
3852 hash_lockowner(lo, strhashval, clp, open_stp);
3853 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854}
3855
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003856static struct nfs4_ol_stateid *
3857alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003859 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04003860 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003861
J. Bruce Fields996e0932011-10-17 11:14:48 -04003862 stp = nfs4_alloc_stateid(clp);
NeilBrown5ac049a2005-06-23 22:03:03 -07003863 if (stp == NULL)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -04003864 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04003865 init_stid(&stp->st_stid, clp, NFS4_LOCK_STID);
NeilBrown8beefa22005-06-23 22:03:08 -07003866 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003867 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
3868 stp->st_stateowner = &lo->lo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07003869 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003870 stp->st_file = fp;
J. Bruce Fields0997b172011-03-02 18:01:35 -05003871 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003872 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07003873 stp->st_openstp = open_stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003874 return stp;
3875}
3876
NeilBrownfd39ca92005-06-23 22:04:03 -07003877static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003878check_lock_length(u64 offset, u64 length)
3879{
Benny Halevy87df4de2008-12-15 19:42:03 +02003880 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881 LOFF_OVERFLOW(offset, length)));
3882}
3883
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003884static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05003885{
3886 struct nfs4_file *fp = lock_stp->st_file;
3887 int oflag = nfs4_access_to_omode(access);
3888
3889 if (test_bit(access, &lock_stp->st_access_bmap))
3890 return;
3891 nfs4_file_get_access(fp, oflag);
3892 __set_bit(access, &lock_stp->st_access_bmap);
3893}
3894
Linus Torvalds1da177e2005-04-16 15:20:36 -07003895/*
3896 * LOCK operation
3897 */
Al Virob37ad282006-10-19 23:28:59 -07003898__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003899nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003900 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003901{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003902 struct nfs4_openowner *open_sop = NULL;
3903 struct nfs4_lockowner *lock_sop = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003904 struct nfs4_ol_stateid *lock_stp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04003905 struct nfs4_file *fp;
3906 struct file *filp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003907 struct file_lock file_lock;
Andy Adamson8dc7c312006-03-20 13:44:26 -05003908 struct file_lock conflock;
Al Virob37ad282006-10-19 23:28:59 -07003909 __be32 status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003910 unsigned int strhashval;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04003911 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07003912 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913
3914 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3915 (long long) lock->lk_offset,
3916 (long long) lock->lk_length);
3917
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918 if (check_lock_length(lock->lk_offset, lock->lk_length))
3919 return nfserr_inval;
3920
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003921 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02003922 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08003923 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3924 return status;
3925 }
3926
Linus Torvalds1da177e2005-04-16 15:20:36 -07003927 nfs4_lock_state();
3928
3929 if (lock->lk_is_new) {
NeilBrown893f8772005-07-07 17:59:17 -07003930 /*
3931 * Client indicates that this is a new lockowner.
3932 * Use open owner and open stateid to create lock owner and
3933 * lock stateid.
3934 */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003935 struct nfs4_ol_stateid *open_stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003936
3937 status = nfserr_stale_clientid;
Andy Adamson60adfc52009-04-03 08:28:50 +03003938 if (!nfsd4_has_session(cstate) &&
3939 STALE_CLIENTID(&lock->lk_new_clientid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003940 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003941
Linus Torvalds1da177e2005-04-16 15:20:36 -07003942 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003943 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944 lock->lk_new_open_seqid,
3945 &lock->lk_new_open_stateid,
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003946 &open_stp);
NeilBrown37515172005-07-07 17:59:16 -07003947 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003948 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003949 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04003950 status = nfserr_bad_stateid;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04003951 if (!nfsd4_has_session(cstate) &&
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003952 !same_clid(&open_sop->oo_owner.so_client->cl_clientid,
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04003953 &lock->v.new.clientid))
3954 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955 /* create lockowner and lock stateid */
3956 fp = open_stp->st_file;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003957 strhashval = lock_ownerstr_hashval(fp->fi_inode,
3958 open_sop->oo_owner.so_client->cl_clientid.cl_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003959 &lock->v.new.owner);
NeilBrown3e9e3db2005-06-23 22:04:20 -07003960 /* XXX: Do we need to check for duplicate stateowners on
3961 * the same file, or should they just be allowed (and
3962 * create new stateids)? */
J. Bruce Fields3e772462011-08-10 19:07:33 -04003963 status = nfserr_jukebox;
Neil Brownb59e3c02005-09-13 01:25:38 -07003964 lock_sop = alloc_init_lock_stateowner(strhashval,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003965 open_sop->oo_owner.so_client, open_stp, lock);
Neil Brownb59e3c02005-09-13 01:25:38 -07003966 if (lock_sop == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003967 goto out;
Neil Brownb59e3c02005-09-13 01:25:38 -07003968 lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp);
J. Bruce Fields8a280512006-01-18 17:43:18 -08003969 if (lock_stp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003970 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003971 } else {
3972 /* lock (lock owner + lock stateid) already exists */
Benny Halevydd453df2009-04-03 08:28:41 +03003973 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003974 lock->lk_old_lock_seqid,
3975 &lock->lk_old_lock_stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003976 NFS4_LOCK_STID, &lock_stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003977 if (status)
3978 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003979 lock_sop = lockowner(lock_stp->st_stateowner);
J. Bruce Fields7d947842010-08-20 18:09:31 -04003980 fp = lock_stp->st_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003981 }
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003982 /* lock_sop and lock_stp have been created or found */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003983
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04003984 lkflg = setlkflg(lock->lk_type);
3985 status = nfs4_check_openmode(lock_stp, lkflg);
3986 if (status)
3987 goto out;
3988
NeilBrown0dd395d2005-07-07 17:59:15 -07003989 status = nfserr_grace;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003990 if (locks_in_grace() && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07003991 goto out;
3992 status = nfserr_no_grace;
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04003993 if (!locks_in_grace() && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07003994 goto out;
3995
Linus Torvalds1da177e2005-04-16 15:20:36 -07003996 locks_init_lock(&file_lock);
3997 switch (lock->lk_type) {
3998 case NFS4_READ_LT:
3999 case NFS4_READW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004000 filp = find_readable_file(lock_stp->st_file);
4001 if (filp)
4002 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004003 file_lock.fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004004 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004005 case NFS4_WRITE_LT:
4006 case NFS4_WRITEW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004007 filp = find_writeable_file(lock_stp->st_file);
4008 if (filp)
4009 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004010 file_lock.fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004011 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004012 default:
4013 status = nfserr_inval;
4014 goto out;
4015 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004016 if (!filp) {
4017 status = nfserr_openmode;
4018 goto out;
4019 }
Neil Brownb59e3c02005-09-13 01:25:38 -07004020 file_lock.fl_owner = (fl_owner_t)lock_sop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004021 file_lock.fl_pid = current->tgid;
4022 file_lock.fl_file = filp;
4023 file_lock.fl_flags = FL_POSIX;
NeilBrownd5b90262006-04-10 22:55:22 -07004024 file_lock.fl_lmops = &nfsd_posix_mng_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004025
4026 file_lock.fl_start = lock->lk_offset;
Benny Halevy87df4de2008-12-15 19:42:03 +02004027 file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004028 nfs4_transform_lock_offset(&file_lock);
4029
4030 /*
4031 * Try to lock the file in the VFS.
4032 * Note: locks.c uses the BKL to protect the inode's lock list.
4033 */
4034
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004035 err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07004036 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037 case 0: /* success! */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004038 update_stateid(&lock_stp->st_stid.sc_stateid);
4039 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004040 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07004041 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004042 break;
4043 case (EAGAIN): /* conflock holds conflicting lock */
4044 status = nfserr_denied;
4045 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4046 nfs4_set_lock_denied(&conflock, &lock->lk_denied);
4047 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004048 case (EDEADLK):
4049 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004050 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04004051 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05004052 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04004053 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004054 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004055 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004056out:
J. Bruce Fields8a280512006-01-18 17:43:18 -08004057 if (status && lock->lk_is_new && lock_sop)
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05004058 release_lockowner(lock_sop);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004059 if (!cstate->replay_owner)
4060 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004061 return status;
4062}
4063
4064/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004065 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4066 * so we do a temporary open here just to get an open file to pass to
4067 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4068 * inode operation.)
4069 */
4070static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
4071{
4072 struct file *file;
4073 int err;
4074
4075 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4076 if (err)
4077 return err;
4078 err = vfs_test_lock(file, lock);
4079 nfsd_close(file);
4080 return err;
4081}
4082
4083/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004084 * LOCKT operation
4085 */
Al Virob37ad282006-10-19 23:28:59 -07004086__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004087nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4088 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004089{
4090 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004091 struct file_lock file_lock;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004092 struct nfs4_lockowner *lo;
Marc Eshelfd85b812006-11-28 16:26:41 -05004093 int error;
Al Virob37ad282006-10-19 23:28:59 -07004094 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04004096 if (locks_in_grace())
Linus Torvalds1da177e2005-04-16 15:20:36 -07004097 return nfserr_grace;
4098
4099 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4100 return nfserr_inval;
4101
Linus Torvalds1da177e2005-04-16 15:20:36 -07004102 nfs4_lock_state();
4103
4104 status = nfserr_stale_clientid;
Andy Adamson60adfc52009-04-03 08:28:50 +03004105 if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004106 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004107
J. Bruce Fields75c096f2011-08-15 18:39:32 -04004108 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004109 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004111 inode = cstate->current_fh.fh_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004112 locks_init_lock(&file_lock);
4113 switch (lockt->lt_type) {
4114 case NFS4_READ_LT:
4115 case NFS4_READW_LT:
4116 file_lock.fl_type = F_RDLCK;
4117 break;
4118 case NFS4_WRITE_LT:
4119 case NFS4_WRITEW_LT:
4120 file_lock.fl_type = F_WRLCK;
4121 break;
4122 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04004123 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004124 status = nfserr_inval;
4125 goto out;
4126 }
4127
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004128 lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner);
4129 if (lo)
4130 file_lock.fl_owner = (fl_owner_t)lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004131 file_lock.fl_pid = current->tgid;
4132 file_lock.fl_flags = FL_POSIX;
4133
4134 file_lock.fl_start = lockt->lt_offset;
Benny Halevy87df4de2008-12-15 19:42:03 +02004135 file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004136
4137 nfs4_transform_lock_offset(&file_lock);
4138
Linus Torvalds1da177e2005-04-16 15:20:36 -07004139 status = nfs_ok;
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004140 error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock);
Marc Eshelfd85b812006-11-28 16:26:41 -05004141 if (error) {
4142 status = nfserrno(error);
4143 goto out;
4144 }
Marc Eshel9d6a8c52007-02-21 00:55:18 -05004145 if (file_lock.fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146 status = nfserr_denied;
Marc Eshel9d6a8c52007-02-21 00:55:18 -05004147 nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004148 }
4149out:
4150 nfs4_unlock_state();
4151 return status;
4152}
4153
Al Virob37ad282006-10-19 23:28:59 -07004154__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004155nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004156 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004157{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004158 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004159 struct file *filp = NULL;
4160 struct file_lock file_lock;
Al Virob37ad282006-10-19 23:28:59 -07004161 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07004162 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163
4164 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4165 (long long) locku->lu_offset,
4166 (long long) locku->lu_length);
4167
4168 if (check_lock_length(locku->lu_offset, locku->lu_length))
4169 return nfserr_inval;
4170
4171 nfs4_lock_state();
4172
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004173 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04004174 &locku->lu_stateid, NFS4_LOCK_STID, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004175 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004177 filp = find_any_file(stp->st_file);
4178 if (!filp) {
4179 status = nfserr_lock_range;
4180 goto out;
4181 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004182 BUG_ON(!filp);
4183 locks_init_lock(&file_lock);
4184 file_lock.fl_type = F_UNLCK;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004185 file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004186 file_lock.fl_pid = current->tgid;
4187 file_lock.fl_file = filp;
4188 file_lock.fl_flags = FL_POSIX;
NeilBrownd5b90262006-04-10 22:55:22 -07004189 file_lock.fl_lmops = &nfsd_posix_mng_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190 file_lock.fl_start = locku->lu_offset;
4191
Benny Halevy87df4de2008-12-15 19:42:03 +02004192 file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193 nfs4_transform_lock_offset(&file_lock);
4194
4195 /*
4196 * Try to unlock the file in the VFS.
4197 */
Marc Eshelfd85b812006-11-28 16:26:41 -05004198 err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07004199 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05004200 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004201 goto out_nfserr;
4202 }
4203 /*
4204 * OK, unlock succeeded; the only thing left to do is update the stateid.
4205 */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004206 update_stateid(&stp->st_stid.sc_stateid);
4207 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004208
4209out:
J. Bruce Fields71c3bcd2011-09-27 21:42:29 -04004210 if (!cstate->replay_owner)
4211 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004212 return status;
4213
4214out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07004215 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004216 goto out;
4217}
4218
4219/*
4220 * returns
4221 * 1: locks held by lockowner
4222 * 0: no locks held by lockowner
4223 */
4224static int
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004225check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004226{
4227 struct file_lock **flpp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004228 struct inode *inode = filp->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004229 int status = 0;
4230
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004231 lock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004232 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004233 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004234 status = 1;
4235 goto out;
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004237 }
4238out:
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004239 unlock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004240 return status;
4241}
4242
Al Virob37ad282006-10-19 23:28:59 -07004243__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004244nfsd4_release_lockowner(struct svc_rqst *rqstp,
4245 struct nfsd4_compound_state *cstate,
4246 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004247{
4248 clientid_t *clid = &rlockowner->rl_clientid;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004249 struct nfs4_stateowner *sop;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004250 struct nfs4_lockowner *lo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004251 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004252 struct xdr_netobj *owner = &rlockowner->rl_owner;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004253 struct list_head matches;
4254 int i;
Al Virob37ad282006-10-19 23:28:59 -07004255 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004256
4257 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4258 clid->cl_boot, clid->cl_id);
4259
4260 /* XXX check for lease expiration */
4261
4262 status = nfserr_stale_clientid;
Neil Brown849823c2005-09-13 01:25:36 -07004263 if (STALE_CLIENTID(clid))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004264 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004265
4266 nfs4_lock_state();
4267
NeilBrown3e9e3db2005-06-23 22:04:20 -07004268 status = nfserr_locks_held;
4269 /* XXX: we're doing a linear search through all the lockowners.
4270 * Yipes! For now we'll just hope clients aren't really using
4271 * release_lockowner much, but eventually we have to fix these
4272 * data structures. */
4273 INIT_LIST_HEAD(&matches);
4274 for (i = 0; i < LOCK_HASH_SIZE; i++) {
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04004275 list_for_each_entry(sop, &lock_ownerstr_hashtbl[i], so_strhash) {
J. Bruce Fields599e0a22007-07-26 17:04:54 -04004276 if (!same_owner_str(sop, owner, clid))
NeilBrown3e9e3db2005-06-23 22:04:20 -07004277 continue;
4278 list_for_each_entry(stp, &sop->so_stateids,
4279 st_perstateowner) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004280 lo = lockowner(sop);
4281 if (check_for_locks(stp->st_file, lo))
NeilBrown3e9e3db2005-06-23 22:04:20 -07004282 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004283 list_add(&lo->lo_list, &matches);
NeilBrown3e9e3db2005-06-23 22:04:20 -07004284 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004285 }
NeilBrown3e9e3db2005-06-23 22:04:20 -07004286 }
4287 /* Clients probably won't expect us to return with some (but not all)
4288 * of the lockowner state released; so don't release any until all
4289 * have been checked. */
4290 status = nfs_ok;
NeilBrown0fa822e2005-07-07 17:59:14 -07004291 while (!list_empty(&matches)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004292 lo = list_entry(matches.next, struct nfs4_lockowner,
4293 lo_list);
NeilBrown0fa822e2005-07-07 17:59:14 -07004294 /* unhash_stateowner deletes so_perclient only
4295 * for openowners. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004296 list_del(&lo->lo_list);
4297 release_lockowner(lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004298 }
4299out:
4300 nfs4_unlock_state();
4301 return status;
4302}
4303
4304static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07004305alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004306{
NeilBrowna55370a2005-06-23 22:03:52 -07004307 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004308}
4309
NeilBrownc7b9a452005-06-23 22:04:30 -07004310int
Andy Adamsona1bcecd2009-04-03 08:28:05 +03004311nfs4_has_reclaimed_state(const char *name, bool use_exchange_id)
NeilBrownc7b9a452005-06-23 22:04:30 -07004312{
4313 unsigned int strhashval = clientstr_hashval(name);
4314 struct nfs4_client *clp;
4315
J. Bruce Fieldse203d502010-11-24 17:30:54 -05004316 clp = find_confirmed_client_by_str(name, strhashval);
NeilBrownc7b9a452005-06-23 22:04:30 -07004317 return clp ? 1 : 0;
4318}
4319
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320/*
4321 * failure => all reset bets are off, nfserr_no_grace...
4322 */
NeilBrown190e4fb2005-06-23 22:04:25 -07004323int
4324nfs4_client_to_reclaim(const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325{
4326 unsigned int strhashval;
4327 struct nfs4_client_reclaim *crp = NULL;
4328
NeilBrowna55370a2005-06-23 22:03:52 -07004329 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4330 crp = alloc_reclaim();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331 if (!crp)
4332 return 0;
NeilBrowna55370a2005-06-23 22:03:52 -07004333 strhashval = clientstr_hashval(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004334 INIT_LIST_HEAD(&crp->cr_strhash);
4335 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07004336 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337 reclaim_str_hashtbl_size++;
4338 return 1;
4339}
4340
4341static void
4342nfs4_release_reclaim(void)
4343{
4344 struct nfs4_client_reclaim *crp = NULL;
4345 int i;
4346
Linus Torvalds1da177e2005-04-16 15:20:36 -07004347 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4348 while (!list_empty(&reclaim_str_hashtbl[i])) {
4349 crp = list_entry(reclaim_str_hashtbl[i].next,
4350 struct nfs4_client_reclaim, cr_strhash);
4351 list_del(&crp->cr_strhash);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004352 kfree(crp);
4353 reclaim_str_hashtbl_size--;
4354 }
4355 }
4356 BUG_ON(reclaim_str_hashtbl_size);
4357}
4358
4359/*
4360 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
NeilBrownfd39ca92005-06-23 22:04:03 -07004361static struct nfs4_client_reclaim *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004362nfs4_find_reclaim_client(clientid_t *clid)
4363{
4364 unsigned int strhashval;
4365 struct nfs4_client *clp;
4366 struct nfs4_client_reclaim *crp = NULL;
4367
4368
4369 /* find clientid in conf_id_hashtbl */
4370 clp = find_confirmed_client(clid);
4371 if (clp == NULL)
4372 return NULL;
4373
NeilBrowna55370a2005-06-23 22:03:52 -07004374 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4375 clp->cl_name.len, clp->cl_name.data,
4376 clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004377
4378 /* find clp->cl_name in reclaim_str_hashtbl */
NeilBrowna55370a2005-06-23 22:03:52 -07004379 strhashval = clientstr_hashval(clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004380 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
NeilBrowna55370a2005-06-23 22:03:52 -07004381 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004382 return crp;
4383 }
4384 }
4385 return NULL;
4386}
4387
4388/*
4389* Called from OPEN. Look for clientid in reclaim list.
4390*/
Al Virob37ad282006-10-19 23:28:59 -07004391__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392nfs4_check_open_reclaim(clientid_t *clid)
4393{
NeilBrowndfc83562005-06-23 22:03:16 -07004394 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004395}
4396
NeilBrownac4d8ff22005-06-23 22:03:30 -07004397/* initialization to perform at module load time: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004398
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004399int
NeilBrownac4d8ff22005-06-23 22:03:30 -07004400nfs4_state_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004401{
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004402 int i, status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004403
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004404 status = nfsd4_init_slabs();
4405 if (status)
4406 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4408 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
4409 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
4410 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
4411 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
Wang Chen02cb2852009-04-24 15:41:57 +08004412 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413 }
Marc Eshel5282fd72009-04-03 08:27:52 +03004414 for (i = 0; i < SESSION_HASH_SIZE; i++)
4415 INIT_LIST_HEAD(&sessionid_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416 for (i = 0; i < FILE_HASH_SIZE; i++) {
4417 INIT_LIST_HEAD(&file_hashtbl[i]);
4418 }
J. Bruce Fields506f2752011-08-11 18:50:18 -04004419 for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) {
4420 INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004421 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004422 for (i = 0; i < LOCK_HASH_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
4424 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004425 memset(&onestateid, ~0, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004426 INIT_LIST_HEAD(&close_lru);
4427 INIT_LIST_HEAD(&client_lru);
4428 INIT_LIST_HEAD(&del_recall_lru);
NeilBrownac4d8ff22005-06-23 22:03:30 -07004429 reclaim_str_hashtbl_size = 0;
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04004430 return 0;
NeilBrownac4d8ff22005-06-23 22:03:30 -07004431}
4432
NeilBrown190e4fb2005-06-23 22:04:25 -07004433static void
4434nfsd4_load_reboot_recovery_data(void)
4435{
4436 int status;
4437
NeilBrown0964a3d2005-06-23 22:04:32 -07004438 nfs4_lock_state();
J. Bruce Fields48483bf2011-08-26 20:40:28 -04004439 nfsd4_init_recdir();
NeilBrown190e4fb2005-06-23 22:04:25 -07004440 status = nfsd4_recdir_load();
NeilBrown0964a3d2005-06-23 22:04:32 -07004441 nfs4_unlock_state();
NeilBrown190e4fb2005-06-23 22:04:25 -07004442 if (status)
4443 printk("NFSD: Failure reading reboot recovery data\n");
4444}
4445
Meelap Shahc2f1a552007-07-17 04:04:39 -07004446/*
4447 * Since the lifetime of a delegation isn't limited to that of an open, a
4448 * client may quite reasonably hang on to a delegation as long as it has
4449 * the inode cached. This becomes an obvious problem the first time a
4450 * client's inode cache approaches the size of the server's total memory.
4451 *
4452 * For now we avoid this problem by imposing a hard limit on the number
4453 * of delegations, which varies according to the server's memory size.
4454 */
4455static void
4456set_max_delegations(void)
4457{
4458 /*
4459 * Allow at most 4 delegations per megabyte of RAM. Quick
4460 * estimates suggest that in the worst case (where every delegation
4461 * is for a different inode), a delegation could take about 1.5K,
4462 * giving a worst case usage of about 6% of memory.
4463 */
4464 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
4465}
4466
NeilBrownac4d8ff22005-06-23 22:03:30 -07004467/* initialization to perform when the nfsd service is started: */
4468
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004469static int
NeilBrownac4d8ff22005-06-23 22:03:30 -07004470__nfs4_state_start(void)
4471{
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004472 int ret;
4473
Linus Torvalds1da177e2005-04-16 15:20:36 -07004474 boot_time = get_seconds();
J. Bruce Fieldsaf558e32007-09-06 12:34:25 -04004475 locks_start_grace(&nfsd4_manager);
Marc Eshel9a8db972007-07-17 04:04:35 -07004476 printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004477 nfsd4_grace);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004478 ret = set_callback_cred();
4479 if (ret)
4480 return -ENOMEM;
NeilBrown58da2822005-06-23 22:03:19 -07004481 laundry_wq = create_singlethread_workqueue("nfsd4");
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004482 if (laundry_wq == NULL)
4483 return -ENOMEM;
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004484 ret = nfsd4_create_callback_queue();
4485 if (ret)
4486 goto out_free_laundry;
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004487 queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
Meelap Shahc2f1a552007-07-17 04:04:39 -07004488 set_max_delegations();
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004489 return 0;
4490out_free_laundry:
4491 destroy_workqueue(laundry_wq);
4492 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004493}
4494
J. Bruce Fields29ab23c2009-09-15 15:56:50 -04004495int
NeilBrown76a35502005-06-23 22:03:26 -07004496nfs4_state_start(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004497{
NeilBrown190e4fb2005-06-23 22:04:25 -07004498 nfsd4_load_reboot_recovery_data();
Jeff Layton4ad9a342010-07-19 16:50:04 -04004499 return __nfs4_state_start();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004500}
4501
Linus Torvalds1da177e2005-04-16 15:20:36 -07004502static void
4503__nfs4_state_shutdown(void)
4504{
4505 int i;
4506 struct nfs4_client *clp = NULL;
4507 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004508 struct list_head *pos, *next, reaplist;
4509
Linus Torvalds1da177e2005-04-16 15:20:36 -07004510 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4511 while (!list_empty(&conf_id_hashtbl[i])) {
4512 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
4513 expire_client(clp);
4514 }
4515 while (!list_empty(&unconf_str_hashtbl[i])) {
4516 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
4517 expire_client(clp);
4518 }
4519 }
4520 INIT_LIST_HEAD(&reaplist);
4521 spin_lock(&recall_lock);
4522 list_for_each_safe(pos, next, &del_recall_lru) {
4523 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4524 list_move(&dp->dl_recall_lru, &reaplist);
4525 }
4526 spin_unlock(&recall_lock);
4527 list_for_each_safe(pos, next, &reaplist) {
4528 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4529 list_del_init(&dp->dl_recall_lru);
4530 unhash_delegation(dp);
4531 }
4532
NeilBrown190e4fb2005-06-23 22:04:25 -07004533 nfsd4_shutdown_recdir();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534}
4535
4536void
4537nfs4_state_shutdown(void)
4538{
Tejun Heoafe2c512010-12-14 16:21:17 +01004539 cancel_delayed_work_sync(&laundromat_work);
NeilBrown5e8d5c22006-04-10 22:55:37 -07004540 destroy_workqueue(laundry_wq);
J. Bruce Fields2c5e7612008-11-20 14:36:17 -06004541 locks_end_grace(&nfsd4_manager);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004542 nfs4_lock_state();
4543 nfs4_release_reclaim();
4544 __nfs4_state_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004545 nfs4_unlock_state();
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04004546 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004547}