blob: 64938ca05c6dfdb73af099d82015a91605424faa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002* Copyright (c) 2001 The Regents of the University of Michigan.
3* All rights reserved.
4*
5* Kendrick Smith <kmsmith@umich.edu>
6* Andy Adamson <kandros@umich.edu>
7*
8* Redistribution and use in source and binary forms, with or without
9* modification, are permitted provided that the following conditions
10* are met:
11*
12* 1. Redistributions of source code must retain the above copyright
13* notice, this list of conditions and the following disclaimer.
14* 2. Redistributions in binary form must reproduce the above copyright
15* notice, this list of conditions and the following disclaimer in the
16* documentation and/or other materials provided with the distribution.
17* 3. Neither the name of the University nor the names of its
18* contributors may be used to endorse or promote products derived
19* from this software without specific prior written permission.
20*
21* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32*
33*/
34
Dave Hansenaceaf782008-02-15 14:37:31 -080035#include <linux/file.h>
Arnd Bergmannb89f4322010-09-18 15:09:31 +020036#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
NeilBrown0964a3d2005-06-23 22:04:32 -070038#include <linux/namei.h>
Meelap Shahc2f1a552007-07-17 04:04:39 -070039#include <linux/swap.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040040#include <linux/pagemap.h>
Chuck Lever7df302f2012-05-29 13:56:37 -040041#include <linux/ratelimit.h>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050042#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton363168b2009-08-14 12:57:56 -040043#include <linux/sunrpc/clnt.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020044#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050045#include "vfs.h"
J. Bruce Fieldsbfa4b362012-04-25 16:49:18 -040046#include "current_stateid.h"
J. Bruce Fields99dbb8f2012-07-27 16:30:12 -040047#include "fault_inject.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040049#include "netns.h"
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define NFSDDBG_FACILITY NFSDDBG_PROC
52
53/* Globals */
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -050054time_t nfsd4_lease = 90; /* default lease time */
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050055time_t nfsd4_grace = 90;
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050056
57#define all_ones {{~0,~0},~0}
58static const stateid_t one_stateid = {
59 .si_generation = ~0,
60 .si_opaque = all_ones,
61};
62static const stateid_t zero_stateid = {
63 /* all fields zero */
64};
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010065static const stateid_t currentstateid = {
66 .si_generation = 1,
67};
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050068
Andy Adamsonec6b5d72009-04-03 08:28:28 +030069static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070070
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050071#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
72#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010073#define CURRENT_STATEID(stateid) (!memcmp((stateid), &currentstateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/* forward declarations */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -040076static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
J. Bruce Fields8b671b82009-02-22 14:51:34 -080078/* Locking: */
79
80/* Currently used for almost all code touching nfsv4 state: */
Ingo Molnar353ab6e2006-03-26 01:37:12 -080081static DEFINE_MUTEX(client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
J. Bruce Fields8b671b82009-02-22 14:51:34 -080083/*
84 * Currently used for the del_recall_lru and file hash table. In an
85 * effort to decrease the scope of the client_mutex, this spinlock may
86 * eventually cover more:
87 */
88static DEFINE_SPINLOCK(recall_lock);
89
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -040090static struct kmem_cache *openowner_slab = NULL;
91static struct kmem_cache *lockowner_slab = NULL;
Christoph Lametere18b8902006-12-06 20:33:20 -080092static struct kmem_cache *file_slab = NULL;
93static struct kmem_cache *stateid_slab = NULL;
94static struct kmem_cache *deleg_slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -070095
Linus Torvalds1da177e2005-04-16 15:20:36 -070096void
97nfs4_lock_state(void)
98{
Ingo Molnar353ab6e2006-03-26 01:37:12 -080099 mutex_lock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
Benny Halevy508dc6e2012-02-23 17:40:52 -0800102static void free_session(struct kref *);
103
104/* Must be called under the client_lock */
105static void nfsd4_put_session_locked(struct nfsd4_session *ses)
106{
107 kref_put(&ses->se_ref, free_session);
108}
109
110static void nfsd4_get_session(struct nfsd4_session *ses)
111{
112 kref_get(&ses->se_ref);
113}
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115void
116nfs4_unlock_state(void)
117{
Ingo Molnar353ab6e2006-03-26 01:37:12 -0800118 mutex_unlock(&client_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
120
121static inline u32
122opaque_hashval(const void *ptr, int nbytes)
123{
124 unsigned char *cptr = (unsigned char *) ptr;
125
126 u32 x = 0;
127 while (nbytes--) {
128 x *= 37;
129 x += *cptr++;
130 }
131 return x;
132}
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134static struct list_head del_recall_lru;
135
J. Bruce Fields32513b42011-10-13 16:00:16 -0400136static void nfsd4_free_file(struct nfs4_file *f)
137{
138 kmem_cache_free(file_slab, f);
139}
140
NeilBrown13cd2182005-06-23 22:03:10 -0700141static inline void
142put_nfs4_file(struct nfs4_file *fi)
143{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800144 if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) {
145 list_del(&fi->fi_hash);
146 spin_unlock(&recall_lock);
147 iput(fi->fi_inode);
J. Bruce Fields32513b42011-10-13 16:00:16 -0400148 nfsd4_free_file(fi);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800149 }
NeilBrown13cd2182005-06-23 22:03:10 -0700150}
151
152static inline void
153get_nfs4_file(struct nfs4_file *fi)
154{
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800155 atomic_inc(&fi->fi_ref);
NeilBrown13cd2182005-06-23 22:03:10 -0700156}
157
NeilBrownef0f3392006-04-10 22:55:41 -0700158static int num_delegations;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700159unsigned int max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700160
161/*
162 * Open owner state (share locks)
163 */
164
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500165/* hash tables for lock and open owners */
166#define OWNER_HASH_BITS 8
167#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
168#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
NeilBrownef0f3392006-04-10 22:55:41 -0700169
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500170static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400171{
172 unsigned int ret;
173
174 ret = opaque_hashval(ownername->data, ownername->len);
175 ret += clientid;
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500176 return ret & OWNER_HASH_MASK;
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400177}
NeilBrownef0f3392006-04-10 22:55:41 -0700178
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500179static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700180
181/* hash table for nfs4_file */
182#define FILE_HASH_BITS 8
183#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
Shan Wei35079582011-01-14 17:35:59 +0800184
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400185static unsigned int file_hashval(struct inode *ino)
186{
187 /* XXX: why are we hashing on inode pointer, anyway? */
188 return hash_ptr(ino, FILE_HASH_BITS);
189}
190
NeilBrownef0f3392006-04-10 22:55:41 -0700191static struct list_head file_hashtbl[FILE_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700192
J. Bruce Fields998db522010-08-07 09:21:41 -0400193static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400194{
195 BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
196 atomic_inc(&fp->fi_access[oflag]);
197}
198
J. Bruce Fields998db522010-08-07 09:21:41 -0400199static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
200{
201 if (oflag == O_RDWR) {
202 __nfs4_file_get_access(fp, O_RDONLY);
203 __nfs4_file_get_access(fp, O_WRONLY);
204 } else
205 __nfs4_file_get_access(fp, oflag);
206}
207
208static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400209{
210 if (fp->fi_fds[oflag]) {
211 fput(fp->fi_fds[oflag]);
212 fp->fi_fds[oflag] = NULL;
213 }
214}
215
J. Bruce Fields998db522010-08-07 09:21:41 -0400216static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400217{
218 if (atomic_dec_and_test(&fp->fi_access[oflag])) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400219 nfs4_file_put_fd(fp, oflag);
J. Bruce Fields3d02fa22011-09-19 15:07:41 -0400220 /*
221 * It's also safe to get rid of the RDWR open *if*
222 * we no longer have need of the other kind of access
223 * or if we already have the other kind of open:
224 */
225 if (fp->fi_fds[1-oflag]
226 || atomic_read(&fp->fi_access[1 - oflag]) == 0)
227 nfs4_file_put_fd(fp, O_RDWR);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400228 }
229}
230
J. Bruce Fields998db522010-08-07 09:21:41 -0400231static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
232{
233 if (oflag == O_RDWR) {
234 __nfs4_file_put_access(fp, O_RDONLY);
235 __nfs4_file_put_access(fp, O_WRONLY);
236 } else
237 __nfs4_file_put_access(fp, oflag);
238}
239
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400240static inline int get_new_stid(struct nfs4_stid *stid)
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400241{
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400242 static int min_stateid = 0;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400243 struct idr *stateids = &stid->sc_client->cl_stateids;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400244 int new_stid;
245 int error;
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400246
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400247 error = idr_get_new_above(stateids, stid, min_stateid, &new_stid);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400248 /*
J. Bruce Fields996e0932011-10-17 11:14:48 -0400249 * Note: the necessary preallocation was done in
250 * nfs4_alloc_stateid(). The idr code caps the number of
251 * preallocations that can exist at a time, but the state lock
252 * prevents anyone from using ours before we get here:
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400253 */
254 BUG_ON(error);
255 /*
256 * It shouldn't be a problem to reuse an opaque stateid value.
257 * I don't think it is for 4.1. But with 4.0 I worry that, for
258 * example, a stray write retransmission could be accepted by
259 * the server when it should have been rejected. Therefore,
260 * adopt a trick from the sctp code to attempt to maximize the
261 * amount of time until an id is reused, by ensuring they always
262 * "increase" (mod INT_MAX):
263 */
264
265 min_stateid = new_stid+1;
266 if (min_stateid == INT_MAX)
267 min_stateid = 0;
268 return new_stid;
J. Bruce Fields36d44c62011-09-08 12:16:03 -0400269}
270
J. Bruce Fields996e0932011-10-17 11:14:48 -0400271static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type)
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400272{
273 stateid_t *s = &stid->sc_stateid;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400274 int new_id;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400275
276 stid->sc_type = type;
277 stid->sc_client = cl;
278 s->si_opaque.so_clid = cl->cl_clientid;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400279 new_id = get_new_stid(stid);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400280 s->si_opaque.so_id = (u32)new_id;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400281 /* Will be incremented before return to client: */
282 s->si_generation = 0;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400283}
284
285static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab)
286{
287 struct idr *stateids = &cl->cl_stateids;
288
289 if (!idr_pre_get(stateids, GFP_KERNEL))
290 return NULL;
291 /*
292 * Note: if we fail here (or any time between now and the time
293 * we actually get the new idr), we won't need to undo the idr
294 * preallocation, since the idr code caps the number of
295 * preallocated entries.
296 */
297 return kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400298}
299
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400300static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
301{
302 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
303}
304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305static struct nfs4_delegation *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400306alloc_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 -0700307{
308 struct nfs4_delegation *dp;
309 struct nfs4_file *fp = stp->st_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
311 dprintk("NFSD alloc_init_deleg\n");
J. Bruce Fieldsc3e48082010-07-28 10:08:57 -0400312 /*
313 * Major work on the lease subsystem (for example, to support
314 * calbacks on stat) will be required before we can support
315 * write delegations properly.
316 */
317 if (type != NFS4_OPEN_DELEGATE_READ)
318 return NULL;
Meelap Shah47f99402007-07-17 04:04:40 -0700319 if (fp->fi_had_conflict)
320 return NULL;
Meelap Shahc2f1a552007-07-17 04:04:39 -0700321 if (num_delegations > max_delegations)
NeilBrownef0f3392006-04-10 22:55:41 -0700322 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400323 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
NeilBrown5b2d21c2005-06-23 22:03:04 -0700324 if (dp == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return dp;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400326 init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400327 /*
328 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400329 * meaning of seqid 0 isn't meaningful, really, but let's avoid
330 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400331 */
332 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownef0f3392006-04-10 22:55:41 -0700333 num_delegations++;
NeilBrownea1da632005-06-23 22:04:17 -0700334 INIT_LIST_HEAD(&dp->dl_perfile);
335 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 INIT_LIST_HEAD(&dp->dl_recall_lru);
NeilBrown13cd2182005-06-23 22:03:10 -0700337 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 dp->dl_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 dp->dl_type = type;
J. Bruce Fields6c02eaa2009-02-02 17:30:51 -0500340 fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 dp->dl_time = 0;
342 atomic_set(&dp->dl_count, 1);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -0500343 INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 return dp;
345}
346
347void
348nfs4_put_delegation(struct nfs4_delegation *dp)
349{
350 if (atomic_dec_and_test(&dp->dl_count)) {
351 dprintk("NFSD: freeing dp %p\n",dp);
NeilBrown13cd2182005-06-23 22:03:10 -0700352 put_nfs4_file(dp->dl_file);
NeilBrown5b2d21c2005-06-23 22:03:04 -0700353 kmem_cache_free(deleg_slab, dp);
NeilBrownef0f3392006-04-10 22:55:41 -0700354 num_delegations--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 }
356}
357
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500358static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500360 if (atomic_dec_and_test(&fp->fi_delegees)) {
361 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
362 fp->fi_lease = NULL;
J. Bruce Fields4ee63622011-04-15 18:08:26 -0400363 fput(fp->fi_deleg_file);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500364 fp->fi_deleg_file = NULL;
365 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366}
367
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400368static void unhash_stid(struct nfs4_stid *s)
369{
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -0400370 struct idr *stateids = &s->sc_client->cl_stateids;
371
372 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400373}
374
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375/* Called under the state lock. */
376static void
377unhash_delegation(struct nfs4_delegation *dp)
378{
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400379 unhash_stid(&dp->dl_stid);
NeilBrownea1da632005-06-23 22:04:17 -0700380 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 spin_lock(&recall_lock);
J. Bruce Fields5d926e82011-02-07 16:53:46 -0500382 list_del_init(&dp->dl_perfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 list_del_init(&dp->dl_recall_lru);
384 spin_unlock(&recall_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500385 nfs4_put_deleg_lease(dp->dl_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 nfs4_put_delegation(dp);
387}
388
389/*
390 * SETCLIENTID state
391 */
392
Benny Halevy36acb662010-05-12 00:13:04 +0300393/* client_lock protects the client lru list and session hash table */
Benny Halevy9089f1b2010-05-12 00:12:26 +0300394static DEFINE_SPINLOCK(client_lock);
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396/* Hash tables for nfs4_clientid state */
397#define CLIENT_HASH_BITS 4
398#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
399#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
400
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400401static unsigned int clientid_hashval(u32 id)
402{
403 return id & CLIENT_HASH_MASK;
404}
405
406static unsigned int clientstr_hashval(const char *name)
407{
408 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
409}
410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411/*
412 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
413 * used in reboot/reset lease grace period processing
414 *
415 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
416 * setclientid_confirmed info.
417 *
418 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
419 * setclientid info.
420 *
421 * client_lru holds client queue ordered by nfs4_client.cl_time
422 * for lease renewal.
423 *
424 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
425 * for last close replay.
426 */
427static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
428static int reclaim_str_hashtbl_size = 0;
429static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
430static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
431static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
432static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
433static struct list_head client_lru;
434static struct list_head close_lru;
435
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400436/*
437 * We store the NONE, READ, WRITE, and BOTH bits separately in the
438 * st_{access,deny}_bmap field of the stateid, in order to track not
439 * only what share bits are currently in force, but also what
440 * combinations of share bits previous opens have used. This allows us
441 * to enforce the recommendation of rfc 3530 14.2.19 that the server
442 * return an error if the client attempt to downgrade to a combination
443 * of share bits not explicable by closing some of its previous opens.
444 *
445 * XXX: This enforcement is actually incomplete, since we don't keep
446 * track of access/deny bit combinations; so, e.g., we allow:
447 *
448 * OPEN allow read, deny write
449 * OPEN allow both, deny none
450 * DOWNGRADE allow read, deny none
451 *
452 * which we should reject.
453 */
Jeff Layton5ae037e2012-05-11 09:45:11 -0400454static unsigned int
455bmap_to_share_mode(unsigned long bmap) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400456 int i;
Jeff Layton5ae037e2012-05-11 09:45:11 -0400457 unsigned int access = 0;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400458
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400459 for (i = 1; i < 4; i++) {
460 if (test_bit(i, &bmap))
Jeff Layton5ae037e2012-05-11 09:45:11 -0400461 access |= i;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400462 }
Jeff Layton5ae037e2012-05-11 09:45:11 -0400463 return access;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400464}
465
Jeff Layton3a328612012-05-11 09:45:12 -0400466static bool
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400467test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400468 unsigned int access, deny;
469
Jeff Layton5ae037e2012-05-11 09:45:11 -0400470 access = bmap_to_share_mode(stp->st_access_bmap);
471 deny = bmap_to_share_mode(stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400472 if ((access & open->op_share_deny) || (deny & open->op_share_access))
Jeff Layton3a328612012-05-11 09:45:12 -0400473 return false;
474 return true;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400475}
476
Jeff Layton82c5ff12012-05-11 09:45:13 -0400477/* set share access for a given stateid */
478static inline void
479set_access(u32 access, struct nfs4_ol_stateid *stp)
480{
481 __set_bit(access, &stp->st_access_bmap);
482}
483
484/* clear share access for a given stateid */
485static inline void
486clear_access(u32 access, struct nfs4_ol_stateid *stp)
487{
488 __clear_bit(access, &stp->st_access_bmap);
489}
490
491/* test whether a given stateid has access */
492static inline bool
493test_access(u32 access, struct nfs4_ol_stateid *stp)
494{
495 return test_bit(access, &stp->st_access_bmap);
496}
497
Jeff Laytonce0fc432012-05-11 09:45:14 -0400498/* set share deny for a given stateid */
499static inline void
500set_deny(u32 access, struct nfs4_ol_stateid *stp)
501{
502 __set_bit(access, &stp->st_deny_bmap);
503}
504
505/* clear share deny for a given stateid */
506static inline void
507clear_deny(u32 access, struct nfs4_ol_stateid *stp)
508{
509 __clear_bit(access, &stp->st_deny_bmap);
510}
511
512/* test whether a given stateid is denying specific access */
513static inline bool
514test_deny(u32 access, struct nfs4_ol_stateid *stp)
515{
516 return test_bit(access, &stp->st_deny_bmap);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400517}
518
519static int nfs4_access_to_omode(u32 access)
520{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400521 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400522 case NFS4_SHARE_ACCESS_READ:
523 return O_RDONLY;
524 case NFS4_SHARE_ACCESS_WRITE:
525 return O_WRONLY;
526 case NFS4_SHARE_ACCESS_BOTH:
527 return O_RDWR;
528 }
529 BUG();
530}
531
Jeff Layton82c5ff12012-05-11 09:45:13 -0400532/* release all access and file references for a given stateid */
533static void
534release_all_access(struct nfs4_ol_stateid *stp)
535{
536 int i;
537
538 for (i = 1; i < 4; i++) {
539 if (test_access(i, stp))
540 nfs4_file_put_access(stp->st_file,
541 nfs4_access_to_omode(i));
542 clear_access(i, stp);
543 }
544}
545
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400546static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500547{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500548 list_del(&stp->st_perfile);
549 list_del(&stp->st_perstateowner);
550}
551
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400552static void close_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500553{
Jeff Layton82c5ff12012-05-11 09:45:13 -0400554 release_all_access(stp);
OGAWA Hirofumia96e5b92011-04-18 11:48:55 -0400555 put_nfs4_file(stp->st_file);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400556 stp->st_file = NULL;
557}
558
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400559static void free_generic_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields4665e2b2011-09-06 14:50:49 -0400560{
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500561 kmem_cache_free(stateid_slab, stp);
562}
563
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400564static void release_lock_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500565{
566 struct file *file;
567
568 unhash_generic_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400569 unhash_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500570 file = find_any_file(stp->st_file);
571 if (file)
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400572 locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400573 close_generic_stateid(stp);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500574 free_generic_stateid(stp);
575}
576
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400577static void unhash_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500578{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400579 struct nfs4_ol_stateid *stp;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500580
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400581 list_del(&lo->lo_owner.so_strhash);
582 list_del(&lo->lo_perstateid);
J. Bruce Fields009673b2011-11-07 17:40:10 -0500583 list_del(&lo->lo_owner_ino_hash);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400584 while (!list_empty(&lo->lo_owner.so_stateids)) {
585 stp = list_first_entry(&lo->lo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400586 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500587 release_lock_stateid(stp);
588 }
589}
590
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400591static void release_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500592{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400593 unhash_lockowner(lo);
594 nfs4_free_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500595}
596
597static void
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400598release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500599{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400600 struct nfs4_lockowner *lo;
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500601
602 while (!list_empty(&open_stp->st_lockowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400603 lo = list_entry(open_stp->st_lockowners.next,
604 struct nfs4_lockowner, lo_perstateid);
605 release_lockowner(lo);
J. Bruce Fields529d7b22011-03-02 23:48:33 -0500606 }
607}
608
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400609static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields22839632009-01-11 14:27:17 -0500610{
611 unhash_generic_stateid(stp);
612 release_stateid_lockowners(stp);
J. Bruce Fields38c387b2011-09-16 17:42:48 -0400613 close_generic_stateid(stp);
614}
615
616static void release_open_stateid(struct nfs4_ol_stateid *stp)
617{
618 unhash_open_stateid(stp);
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400619 unhash_stid(&stp->st_stid);
J. Bruce Fields22839632009-01-11 14:27:17 -0500620 free_generic_stateid(stp);
621}
622
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400623static void unhash_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500624{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400625 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500626
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400627 list_del(&oo->oo_owner.so_strhash);
628 list_del(&oo->oo_perclient);
629 while (!list_empty(&oo->oo_owner.so_stateids)) {
630 stp = list_first_entry(&oo->oo_owner.so_stateids,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -0400631 struct nfs4_ol_stateid, st_perstateowner);
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -0500632 release_open_stateid(stp);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500633 }
634}
635
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400636static void release_last_closed_stateid(struct nfs4_openowner *oo)
637{
638 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
639
640 if (s) {
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400641 unhash_stid(&s->st_stid);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400642 free_generic_stateid(s);
643 oo->oo_last_closed_stid = NULL;
644 }
645}
646
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400647static void release_openowner(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500648{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400649 unhash_openowner(oo);
650 list_del(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -0400651 release_last_closed_stateid(oo);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400652 nfs4_free_openowner(oo);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -0500653}
654
Marc Eshel5282fd72009-04-03 08:27:52 +0300655#define SESSION_HASH_SIZE 512
656static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
657
658static inline int
659hash_sessionid(struct nfs4_sessionid *sessionid)
660{
661 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
662
663 return sid->sequence % SESSION_HASH_SIZE;
664}
665
Trond Myklebust8f199b82012-03-20 15:11:17 -0400666#ifdef NFSD_DEBUG
Marc Eshel5282fd72009-04-03 08:27:52 +0300667static inline void
668dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
669{
670 u32 *ptr = (u32 *)(&sessionid->data[0]);
671 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
672}
Trond Myklebust8f199b82012-03-20 15:11:17 -0400673#else
674static inline void
675dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
676{
677}
678#endif
679
Marc Eshel5282fd72009-04-03 08:27:52 +0300680
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300681static void
682gen_sessionid(struct nfsd4_session *ses)
683{
684 struct nfs4_client *clp = ses->se_client;
685 struct nfsd4_sessionid *sid;
686
687 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
688 sid->clientid = clp->cl_clientid;
689 sid->sequence = current_sessionid++;
690 sid->reserved = 0;
691}
692
693/*
Andy Adamsona6496372009-08-28 08:45:01 -0400694 * The protocol defines ca_maxresponssize_cached to include the size of
695 * the rpc header, but all we need to cache is the data starting after
696 * the end of the initial SEQUENCE operation--the rest we regenerate
697 * each time. Therefore we can advertise a ca_maxresponssize_cached
698 * value that is the number of bytes in our cache plus a few additional
699 * bytes. In order to stay on the safe side, and not promise more than
700 * we can cache, those additional bytes must be the minimum possible: 24
701 * bytes of rpc header (xid through accept state, with AUTH_NULL
702 * verifier), 12 for the compound header (with zero-length tag), and 44
703 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300704 */
Andy Adamsona6496372009-08-28 08:45:01 -0400705#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
706
Andy Adamson557ce262009-08-28 08:45:04 -0400707static void
708free_session_slots(struct nfsd4_session *ses)
709{
710 int i;
711
712 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
713 kfree(ses->se_slots[i]);
714}
715
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -0400716/*
717 * We don't actually need to cache the rpc and session headers, so we
718 * can allocate a little less for each slot:
719 */
720static inline int slot_bytes(struct nfsd4_channel_attrs *ca)
721{
722 return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
723}
724
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400725static int nfsd4_sanitize_slot_size(u32 size)
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300726{
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400727 size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */
728 size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300729
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400730 return size;
731}
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300732
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400733/*
734 * XXX: If we run out of reserved DRC memory we could (up to a point)
735 * re-negotiate active sessions and reduce their slot usage to make
Justin P. Mattock42b2aa82011-11-28 20:31:00 -0800736 * room for new connections. For now we just fail the create session.
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400737 */
738static int nfsd4_get_drc_mem(int slotsize, u32 num)
739{
740 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300741
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400742 num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION);
Andy Adamson557ce262009-08-28 08:45:04 -0400743
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400744 spin_lock(&nfsd_drc_lock);
745 avail = min_t(int, NFSD_MAX_MEM_PER_SESSION,
746 nfsd_drc_max_mem - nfsd_drc_mem_used);
747 num = min_t(int, num, avail / slotsize);
748 nfsd_drc_mem_used += num * slotsize;
749 spin_unlock(&nfsd_drc_lock);
750
751 return num;
752}
753
754static void nfsd4_put_drc_mem(int slotsize, int num)
755{
756 spin_lock(&nfsd_drc_lock);
757 nfsd_drc_mem_used -= slotsize * num;
758 spin_unlock(&nfsd_drc_lock);
759}
760
761static struct nfsd4_session *alloc_session(int slotsize, int numslots)
762{
763 struct nfsd4_session *new;
764 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300765
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -0400766 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400767 + sizeof(struct nfsd4_session) > PAGE_SIZE);
768 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -0400769
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400770 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300771 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400772 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -0400773 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400774 for (i = 0; i < numslots; i++) {
775 mem = sizeof(struct nfsd4_slot) + slotsize;
776 new->se_slots[i] = kzalloc(mem, GFP_KERNEL);
777 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -0400778 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -0400779 }
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400780 return new;
781out_free:
782 while (i--)
783 kfree(new->se_slots[i]);
784 kfree(new);
785 return NULL;
786}
787
788static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize)
789{
790 u32 maxrpc = nfsd_serv->sv_max_mesg;
791
792 new->maxreqs = numslots;
Mi Jinlongd2b21742011-03-10 17:43:37 +0800793 new->maxresp_cached = min_t(u32, req->maxresp_cached,
794 slotsize + NFSD_MIN_HDR_SEQ_SZ);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400795 new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc);
796 new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc);
797 new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND);
798}
799
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400800static void free_conn(struct nfsd4_conn *c)
801{
802 svc_xprt_put(c->cn_xprt);
803 kfree(c);
804}
805
806static void nfsd4_conn_lost(struct svc_xpt_user *u)
807{
808 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
809 struct nfs4_client *clp = c->cn_session->se_client;
810
811 spin_lock(&clp->cl_lock);
812 if (!list_empty(&c->cn_persession)) {
813 list_del(&c->cn_persession);
814 free_conn(c);
815 }
816 spin_unlock(&clp->cl_lock);
J. Bruce Fieldseea49802010-11-18 08:34:12 -0500817 nfsd4_probe_callback(clp);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400818}
819
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400820static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400821{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400822 struct nfsd4_conn *conn;
823
824 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
825 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400826 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400827 svc_xprt_get(rqstp->rq_xprt);
828 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -0400829 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400830 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
831 return conn;
832}
833
J. Bruce Fields328ead22010-09-29 16:11:06 -0400834static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
835{
836 conn->cn_session = ses;
837 list_add(&conn->cn_persession, &ses->se_conns);
838}
839
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400840static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
841{
842 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400843
844 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -0400845 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400846 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400847}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400848
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400849static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400850{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400851 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400852 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400853}
854
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400855static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400856{
857 struct nfsd4_conn *conn;
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400858 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400859
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400860 conn = alloc_conn(rqstp, dir);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -0400861 if (!conn)
862 return nfserr_jukebox;
863 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -0400864 ret = nfsd4_register_conn(conn);
865 if (ret)
866 /* oops; xprt is already down: */
867 nfsd4_conn_lost(&conn->cn_xpt_user);
Weston Andros Adamson24119672012-05-24 15:42:17 -0400868 if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN &&
869 dir & NFS4_CDFC4_BACK) {
870 /* callback channel may be back up */
871 nfsd4_probe_callback(ses->se_client);
872 }
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400873 return nfs_ok;
874}
875
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400876static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses)
877{
878 u32 dir = NFS4_CDFC4_FORE;
879
880 if (ses->se_flags & SESSION4_BACK_CHAN)
881 dir |= NFS4_CDFC4_BACK;
882
883 return nfsd4_new_conn(rqstp, ses, dir);
884}
885
886/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400887static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400888{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400889 struct nfs4_client *clp = s->se_client;
890 struct nfsd4_conn *c;
891
892 spin_lock(&clp->cl_lock);
893 while (!list_empty(&s->se_conns)) {
894 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
895 list_del_init(&c->cn_persession);
896 spin_unlock(&clp->cl_lock);
897
898 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
899 free_conn(c);
900
901 spin_lock(&clp->cl_lock);
902 }
903 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400904}
905
Benny Halevy508dc6e2012-02-23 17:40:52 -0800906static void free_session(struct kref *kref)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400907{
908 struct nfsd4_session *ses;
909 int mem;
910
J. Bruce Fieldsbc2df472012-06-12 08:28:48 -0400911 lockdep_assert_held(&client_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400912 ses = container_of(kref, struct nfsd4_session, se_ref);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400913 nfsd4_del_conns(ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400914 spin_lock(&nfsd_drc_lock);
915 mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel);
916 nfsd_drc_mem_used -= mem;
917 spin_unlock(&nfsd_drc_lock);
918 free_session_slots(ses);
919 kfree(ses);
920}
921
Benny Halevy508dc6e2012-02-23 17:40:52 -0800922void nfsd4_put_session(struct nfsd4_session *ses)
923{
924 spin_lock(&client_lock);
925 nfsd4_put_session_locked(ses);
926 spin_unlock(&client_lock);
927}
928
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400929static 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 -0400930{
931 struct nfsd4_session *new;
932 struct nfsd4_channel_attrs *fchan = &cses->fore_channel;
933 int numslots, slotsize;
J. Bruce Fields57b7b432012-04-25 17:58:50 -0400934 __be32 status;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400935 int idx;
936
937 /*
938 * Note decreasing slot size below client's request may
939 * make it difficult for client to function correctly, whereas
940 * decreasing the number of slots will (just?) affect
941 * performance. When short on memory we therefore prefer to
942 * decrease number of slots instead of their size.
943 */
944 slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached);
945 numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs);
Mi Jinlongced6dfe2010-11-11 18:03:50 +0800946 if (numslots < 1)
947 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400948
949 new = alloc_session(slotsize, numslots);
950 if (!new) {
951 nfsd4_put_drc_mem(slotsize, fchan->maxreqs);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400952 return NULL;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400953 }
954 init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize);
Andy Adamson557ce262009-08-28 08:45:04 -0400955
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300956 new->se_client = clp;
957 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300958
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400959 INIT_LIST_HEAD(&new->se_conns);
960
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400961 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300962 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -0400963 new->se_cb_prog = cses->callback_prog;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300964 kref_init(&new->se_ref);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -0400965 idx = hash_sessionid(&new->se_sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300966 spin_lock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300967 list_add(&new->se_hash, &sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400968 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300969 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -0400970 spin_unlock(&clp->cl_lock);
Benny Halevy9089f1b2010-05-12 00:12:26 +0300971 spin_unlock(&client_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300972
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400973 status = nfsd4_new_conn_from_crses(rqstp, new);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400974 /* whoops: benny points out, status is ignored! (err, or bogus) */
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400975 if (status) {
Benny Halevy508dc6e2012-02-23 17:40:52 -0800976 spin_lock(&client_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400977 free_session(&new->se_ref);
Benny Halevy508dc6e2012-02-23 17:40:52 -0800978 spin_unlock(&client_lock);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400979 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400980 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400981 if (cses->flags & SESSION4_BACK_CHAN) {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400982 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400983 /*
984 * This is a little silly; with sessions there's no real
985 * use for the callback address. Use the peer address
986 * as a reasonable default for now, but consider fixing
987 * the rpc client not to require an address in the
988 * future:
989 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400990 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
991 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400992 }
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -0400993 nfsd4_probe_callback(clp);
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400994 return new;
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300995}
996
Benny Halevy9089f1b2010-05-12 00:12:26 +0300997/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +0300998static struct nfsd4_session *
999find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
1000{
1001 struct nfsd4_session *elem;
1002 int idx;
1003
1004 dump_sessionid(__func__, sessionid);
1005 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +03001006 /* Search in the appropriate list */
1007 list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +03001008 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1009 NFS4_MAX_SESSIONID_LEN)) {
1010 return elem;
1011 }
1012 }
1013
1014 dprintk("%s: session not found\n", __func__);
1015 return NULL;
1016}
1017
Benny Halevy9089f1b2010-05-12 00:12:26 +03001018/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +03001019static void
Marc Eshel5282fd72009-04-03 08:27:52 +03001020unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +03001021{
1022 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001023 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +03001024 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001025 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +03001026}
1027
Benny Halevy36acb662010-05-12 00:13:04 +03001028/* must be called under the client_lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029static inline void
Benny Halevy36acb662010-05-12 00:13:04 +03001030renew_client_locked(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031{
Benny Halevy07cd4902010-05-12 00:13:41 +03001032 if (is_client_expired(clp)) {
J. Bruce Fields74477582012-05-04 14:57:52 -04001033 WARN_ON(1);
1034 printk("%s: client (clientid %08x/%08x) already expired\n",
Benny Halevy07cd4902010-05-12 00:13:41 +03001035 __func__,
1036 clp->cl_clientid.cl_boot,
1037 clp->cl_clientid.cl_id);
1038 return;
1039 }
1040
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 dprintk("renewing client (clientid %08x/%08x)\n",
1042 clp->cl_clientid.cl_boot,
1043 clp->cl_clientid.cl_id);
1044 list_move_tail(&clp->cl_lru, &client_lru);
1045 clp->cl_time = get_seconds();
1046}
1047
Benny Halevy36acb662010-05-12 00:13:04 +03001048static inline void
1049renew_client(struct nfs4_client *clp)
1050{
1051 spin_lock(&client_lock);
1052 renew_client_locked(clp);
1053 spin_unlock(&client_lock);
1054}
1055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1057static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001058STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059{
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001060 if (clid->cl_boot == nn->boot_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +03001062 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001063 clid->cl_boot, clid->cl_id, nn->boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 return 1;
1065}
1066
1067/*
1068 * XXX Should we use a slab cache ?
1069 * This type of memory management is somewhat inefficient, but we use it
1070 * anyway since SETCLIENTID is not a common operation.
1071 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001072static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073{
1074 struct nfs4_client *clp;
1075
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001076 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1077 if (clp == NULL)
1078 return NULL;
Thomas Meyer67114fe2011-11-17 23:43:40 +01001079 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001080 if (clp->cl_name.data == NULL) {
1081 kfree(clp);
1082 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 }
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001084 clp->cl_name.len = name.len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 return clp;
1086}
1087
1088static inline void
1089free_client(struct nfs4_client *clp)
1090{
J. Bruce Fieldsbc2df472012-06-12 08:28:48 -04001091 lockdep_assert_held(&client_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001092 while (!list_empty(&clp->cl_sessions)) {
1093 struct nfsd4_session *ses;
1094 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1095 se_perclnt);
1096 list_del(&ses->se_perclnt);
Benny Halevy508dc6e2012-02-23 17:40:52 -08001097 nfsd4_put_session_locked(ses);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001098 }
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001099 free_svc_cred(&clp->cl_cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 kfree(clp->cl_name.data);
1101 kfree(clp);
1102}
1103
Benny Halevyd7682982010-05-12 00:13:54 +03001104void
1105release_session_client(struct nfsd4_session *session)
1106{
1107 struct nfs4_client *clp = session->se_client;
1108
1109 if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock))
1110 return;
1111 if (is_client_expired(clp)) {
1112 free_client(clp);
1113 session->se_client = NULL;
1114 } else
1115 renew_client_locked(clp);
1116 spin_unlock(&client_lock);
Benny Halevyd7682982010-05-12 00:13:54 +03001117}
1118
Benny Halevy84d38ac2010-05-12 00:13:16 +03001119/* must be called under the client_lock */
1120static inline void
1121unhash_client_locked(struct nfs4_client *clp)
1122{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001123 struct nfsd4_session *ses;
1124
Benny Halevy07cd4902010-05-12 00:13:41 +03001125 mark_client_expired(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001126 list_del(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001127 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001128 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1129 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001130 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001131}
1132
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133static void
1134expire_client(struct nfs4_client *clp)
1135{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001136 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 struct list_head reaplist;
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 INIT_LIST_HEAD(&reaplist);
1141 spin_lock(&recall_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001142 while (!list_empty(&clp->cl_delegations)) {
1143 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
NeilBrownea1da632005-06-23 22:04:17 -07001144 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 list_move(&dp->dl_recall_lru, &reaplist);
1146 }
1147 spin_unlock(&recall_lock);
1148 while (!list_empty(&reaplist)) {
1149 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 unhash_delegation(dp);
1151 }
NeilBrownea1da632005-06-23 22:04:17 -07001152 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001153 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1154 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 }
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001156 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001157 if (clp->cl_cb_conn.cb_xprt)
1158 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001159 list_del(&clp->cl_idhash);
1160 list_del(&clp->cl_strhash);
1161 spin_lock(&client_lock);
1162 unhash_client_locked(clp);
Benny Halevy46583e22010-05-12 00:13:29 +03001163 if (atomic_read(&clp->cl_refcount) == 0)
1164 free_client(clp);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001165 spin_unlock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166}
1167
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001168static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1169{
1170 memcpy(target->cl_verifier.data, source->data,
1171 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172}
1173
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001174static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1175{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1177 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1178}
1179
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001180static int copy_cred(struct svc_cred *target, struct svc_cred *source)
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001181{
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001182 if (source->cr_principal) {
1183 target->cr_principal =
1184 kstrdup(source->cr_principal, GFP_KERNEL);
1185 if (target->cr_principal == NULL)
1186 return -ENOMEM;
1187 } else
1188 target->cr_principal = NULL;
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001189 target->cr_flavor = source->cr_flavor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 target->cr_uid = source->cr_uid;
1191 target->cr_gid = source->cr_gid;
1192 target->cr_group_info = source->cr_group_info;
1193 get_group_info(target->cr_group_info);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001194 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195}
1196
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001197static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001198{
NeilBrowna55370a2005-06-23 22:03:52 -07001199 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200}
1201
1202static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001203same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1204{
1205 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206}
1207
1208static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001209same_clid(clientid_t *cl1, clientid_t *cl2)
1210{
1211 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212}
1213
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001214static bool groups_equal(struct group_info *g1, struct group_info *g2)
1215{
1216 int i;
1217
1218 if (g1->ngroups != g2->ngroups)
1219 return false;
1220 for (i=0; i<g1->ngroups; i++)
1221 if (GROUP_AT(g1, i) != GROUP_AT(g2, i))
1222 return false;
1223 return true;
1224}
1225
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001226/*
1227 * RFC 3530 language requires clid_inuse be returned when the
1228 * "principal" associated with a requests differs from that previously
1229 * used. We use uid, gid's, and gss principal string as our best
1230 * approximation. We also don't want to allow non-gss use of a client
1231 * established using gss: in theory cr_principal should catch that
1232 * change, but in practice cr_principal can be null even in the gss case
1233 * since gssd doesn't always pass down a principal string.
1234 */
1235static bool is_gss_cred(struct svc_cred *cr)
1236{
1237 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1238 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1239}
1240
1241
Vivek Trivedi5559b502012-07-24 21:18:20 +05301242static bool
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001243same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1244{
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001245 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001246 || (cr1->cr_uid != cr2->cr_uid)
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001247 || (cr1->cr_gid != cr2->cr_gid)
1248 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1249 return false;
1250 if (cr1->cr_principal == cr2->cr_principal)
1251 return true;
1252 if (!cr1->cr_principal || !cr2->cr_principal)
1253 return false;
Vivek Trivedi5559b502012-07-24 21:18:20 +05301254 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255}
1256
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001257static void gen_clid(struct nfs4_client *clp)
1258{
1259 static u32 current_clientid = 1;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001260 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
J. Bruce Fields5ec7b462007-11-21 21:58:56 -05001261
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001262 clp->cl_clientid.cl_boot = nn->boot_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 clp->cl_clientid.cl_id = current_clientid++;
1264}
1265
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001266static void gen_confirm(struct nfs4_client *clp)
1267{
Chuck Leverab4684d2012-03-02 17:13:50 -05001268 __be32 verf[2];
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001269 static u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Chuck Leverab4684d2012-03-02 17:13:50 -05001271 verf[0] = (__be32)get_seconds();
1272 verf[1] = (__be32)i++;
1273 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274}
1275
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001276static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001277{
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001278 return idr_find(&cl->cl_stateids, t->si_opaque.so_id);
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001279}
1280
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001281static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001282{
1283 struct nfs4_stid *s;
1284
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001285 s = find_stateid(cl, t);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001286 if (!s)
1287 return NULL;
1288 if (typemask & s->sc_type)
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001289 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04001290 return NULL;
1291}
1292
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001293static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
1294 struct svc_rqst *rqstp, nfs4_verifier *verf)
1295{
1296 struct nfs4_client *clp;
1297 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001298 int ret;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001299
1300 clp = alloc_client(name);
1301 if (clp == NULL)
1302 return NULL;
1303
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001304 INIT_LIST_HEAD(&clp->cl_sessions);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001305 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1306 if (ret) {
1307 spin_lock(&client_lock);
1308 free_client(clp);
1309 spin_unlock(&client_lock);
1310 return NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001311 }
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04001312 idr_init(&clp->cl_stateids);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001313 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
Benny Halevy46583e22010-05-12 00:13:29 +03001314 atomic_set(&clp->cl_refcount, 0);
J. Bruce Fields77a35692010-04-30 18:51:44 -04001315 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001316 INIT_LIST_HEAD(&clp->cl_idhash);
1317 INIT_LIST_HEAD(&clp->cl_strhash);
1318 INIT_LIST_HEAD(&clp->cl_openowners);
1319 INIT_LIST_HEAD(&clp->cl_delegations);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001320 INIT_LIST_HEAD(&clp->cl_lru);
J. Bruce Fields5ce8ba22011-01-10 16:44:41 -05001321 INIT_LIST_HEAD(&clp->cl_callbacks);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001322 spin_lock_init(&clp->cl_lock);
J. Bruce Fieldscee277d2010-05-26 17:52:14 -04001323 INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc);
Benny Halevy07cd4902010-05-12 00:13:41 +03001324 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001325 clear_bit(0, &clp->cl_cb_slot_busy);
1326 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1327 copy_verf(clp, verf);
1328 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001329 gen_confirm(clp);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001330 clp->cl_cb_session = NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001331 return clp;
1332}
1333
NeilBrownfd39ca92005-06-23 22:04:03 -07001334static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
1336{
1337 unsigned int idhashval;
1338
1339 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
1340 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1341 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
Benny Halevy36acb662010-05-12 00:13:04 +03001342 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343}
1344
NeilBrownfd39ca92005-06-23 22:04:03 -07001345static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346move_to_confirmed(struct nfs4_client *clp)
1347{
1348 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1349 unsigned int strhashval;
1350
1351 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Akinobu Mitaf1166292006-06-26 00:24:46 -07001352 list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07001353 strhashval = clientstr_hashval(clp->cl_recdir);
Benny Halevy328efba2010-05-12 00:12:51 +03001354 list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 renew_client(clp);
1356}
1357
1358static struct nfs4_client *
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001359find_confirmed_client(clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360{
1361 struct nfs4_client *clp;
1362 unsigned int idhashval = clientid_hashval(clid->cl_id);
1363
1364 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001365 if (same_clid(&clp->cl_clientid, clid)) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001366 if ((bool)clp->cl_minorversion != sessions)
1367 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001368 renew_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04001370 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 }
1372 return NULL;
1373}
1374
1375static struct nfs4_client *
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001376find_unconfirmed_client(clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377{
1378 struct nfs4_client *clp;
1379 unsigned int idhashval = clientid_hashval(clid->cl_id);
1380
1381 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001382 if (same_clid(&clp->cl_clientid, clid)) {
1383 if ((bool)clp->cl_minorversion != sessions)
1384 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 return clp;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001386 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 }
1388 return NULL;
1389}
1390
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001391static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001392{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05001393 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001394}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03001395
NeilBrown28ce6052005-06-23 22:03:56 -07001396static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001397find_confirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001398{
1399 struct nfs4_client *clp;
1400
1401 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001402 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001403 return clp;
1404 }
1405 return NULL;
1406}
1407
1408static struct nfs4_client *
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001409find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
NeilBrown28ce6052005-06-23 22:03:56 -07001410{
1411 struct nfs4_client *clp;
1412
1413 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001414 if (same_name(clp->cl_recdir, dname))
NeilBrown28ce6052005-06-23 22:03:56 -07001415 return clp;
1416 }
1417 return NULL;
1418}
1419
NeilBrownfd39ca92005-06-23 22:04:03 -07001420static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001421gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422{
J. Bruce Fields07263f12010-05-31 19:09:40 -04001423 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09001424 struct sockaddr *sa = svc_addr(rqstp);
1425 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04001426 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Jeff Layton7077ecb2009-08-14 12:57:58 -04001428 /* Currently, we only support tcp and tcp6 for the callback channel */
1429 if (se->se_callback_netid_len == 3 &&
1430 !memcmp(se->se_callback_netid_val, "tcp", 3))
1431 expected_family = AF_INET;
1432 else if (se->se_callback_netid_len == 4 &&
1433 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1434 expected_family = AF_INET6;
1435 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 goto out_err;
1437
Stanislav Kinsburskyf2ac4dc2012-01-13 13:09:27 +04001438 conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001439 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04001440 (struct sockaddr *)&conn->cb_addr,
1441 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001442
J. Bruce Fields07263f12010-05-31 19:09:40 -04001443 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04001445
J. Bruce Fields07263f12010-05-31 19:09:40 -04001446 if (conn->cb_addr.ss_family == AF_INET6)
1447 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04001448
J. Bruce Fields07263f12010-05-31 19:09:40 -04001449 conn->cb_prog = se->se_callback_prog;
1450 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08001451 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 return;
1453out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04001454 conn->cb_addr.ss_family = AF_UNSPEC;
1455 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07001456 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 "will not receive delegations\n",
1458 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1459
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 return;
1461}
1462
Andy Adamson074fe892009-04-03 08:28:15 +03001463/*
Andy Adamson557ce262009-08-28 08:45:04 -04001464 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03001465 */
1466void
1467nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1468{
Andy Adamson557ce262009-08-28 08:45:04 -04001469 struct nfsd4_slot *slot = resp->cstate.slot;
1470 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03001471
Andy Adamson557ce262009-08-28 08:45:04 -04001472 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001473
Andy Adamson557ce262009-08-28 08:45:04 -04001474 slot->sl_opcnt = resp->opcnt;
1475 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001476
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05001477 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001478 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04001479 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03001480 return;
1481 }
Andy Adamson557ce262009-08-28 08:45:04 -04001482 slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap;
1483 base = (char *)resp->cstate.datap -
1484 (char *)resp->xbuf->head[0].iov_base;
1485 if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data,
1486 slot->sl_datalen))
1487 WARN("%s: sessions DRC could not cache compound\n", __func__);
1488 return;
Andy Adamson074fe892009-04-03 08:28:15 +03001489}
1490
1491/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04001492 * Encode the replay sequence operation from the slot values.
1493 * If cachethis is FALSE encode the uncached rep error on the next
1494 * operation which sets resp->p and increments resp->opcnt for
1495 * nfs4svc_encode_compoundres.
1496 *
Andy Adamson074fe892009-04-03 08:28:15 +03001497 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04001498static __be32
1499nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1500 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03001501{
Andy Adamsonabfabf82009-07-23 19:02:18 -04001502 struct nfsd4_op *op;
1503 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001504
Andy Adamsonabfabf82009-07-23 19:02:18 -04001505 /* Encode the replayed sequence operation */
1506 op = &args->ops[resp->opcnt - 1];
1507 nfsd4_encode_operation(resp, op);
1508
1509 /* Return nfserr_retry_uncached_rep in next operation. */
J. Bruce Fields73e79482012-02-13 16:39:00 -05001510 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04001511 op = &args->ops[resp->opcnt++];
1512 op->status = nfserr_retry_uncached_rep;
1513 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03001514 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04001515 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03001516}
1517
1518/*
Andy Adamson557ce262009-08-28 08:45:04 -04001519 * The sequence operation is not cached because we can use the slot and
1520 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03001521 */
1522__be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03001523nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1524 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03001525{
Andy Adamson557ce262009-08-28 08:45:04 -04001526 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03001527 __be32 status;
1528
Andy Adamson557ce262009-08-28 08:45:04 -04001529 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03001530
Andy Adamsonabfabf82009-07-23 19:02:18 -04001531 /* Either returns 0 or nfserr_retry_uncached */
1532 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1533 if (status == nfserr_retry_uncached_rep)
1534 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03001535
Andy Adamson557ce262009-08-28 08:45:04 -04001536 /* The sequence operation has been encoded, cstate->datap set. */
1537 memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen);
Andy Adamson074fe892009-04-03 08:28:15 +03001538
Andy Adamson557ce262009-08-28 08:45:04 -04001539 resp->opcnt = slot->sl_opcnt;
1540 resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen);
1541 status = slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03001542
1543 return status;
1544}
1545
Andy Adamson0733d212009-04-03 08:28:01 +03001546/*
1547 * Set the exchange_id flags returned by the server.
1548 */
1549static void
1550nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1551{
1552 /* pNFS is not supported */
1553 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1554
1555 /* Referrals are supported, Migration is not. */
1556 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1557
1558 /* set the wire flags to return to client. */
1559 clid->flags = new->cl_exchange_flags;
1560}
1561
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001562static bool client_has_state(struct nfs4_client *clp)
1563{
1564 /*
1565 * Note clp->cl_openowners check isn't quite right: there's no
1566 * need to count owners without stateid's.
1567 *
1568 * Also note we should probably be using this in 4.0 case too.
1569 */
J. Bruce Fields6eccece2012-05-29 16:37:44 -04001570 return !list_empty(&clp->cl_openowners)
1571 || !list_empty(&clp->cl_delegations)
1572 || !list_empty(&clp->cl_sessions);
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001573}
1574
Al Virob37ad282006-10-19 23:28:59 -07001575__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03001576nfsd4_exchange_id(struct svc_rqst *rqstp,
1577 struct nfsd4_compound_state *cstate,
1578 struct nfsd4_exchange_id *exid)
1579{
Andy Adamson0733d212009-04-03 08:28:01 +03001580 struct nfs4_client *unconf, *conf, *new;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001581 __be32 status;
Andy Adamson0733d212009-04-03 08:28:01 +03001582 unsigned int strhashval;
1583 char dname[HEXDIR_LEN];
Jeff Layton363168b2009-08-14 12:57:56 -04001584 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03001585 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04001586 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001587 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
Andy Adamson0733d212009-04-03 08:28:01 +03001588
Jeff Layton363168b2009-08-14 12:57:56 -04001589 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03001590 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04001591 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03001592 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04001593 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03001594
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001595 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03001596 return nfserr_inval;
1597
1598 /* Currently only support SP4_NONE */
1599 switch (exid->spa_how) {
1600 case SP4_NONE:
1601 break;
1602 case SP4_SSV:
J. Bruce Fields044bc1d2010-11-12 14:36:06 -05001603 return nfserr_serverfault;
Andy Adamson0733d212009-04-03 08:28:01 +03001604 default:
1605 BUG(); /* checked by xdr code */
1606 case SP4_MACH_CRED:
1607 return nfserr_serverfault; /* no excuse :-/ */
1608 }
1609
1610 status = nfs4_make_rec_clidname(dname, &exid->clname);
1611
1612 if (status)
J. Bruce Fields2786cc32012-05-12 20:53:20 -04001613 return status;
Andy Adamson0733d212009-04-03 08:28:01 +03001614
1615 strhashval = clientstr_hashval(dname);
1616
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001617 /* Cases below refer to rfc 5661 section 18.35.4: */
Andy Adamson0733d212009-04-03 08:28:01 +03001618 nfs4_lock_state();
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001619 conf = find_confirmed_client_by_str(dname, strhashval);
Andy Adamson0733d212009-04-03 08:28:01 +03001620 if (conf) {
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04001621 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
1622 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
1623
J. Bruce Fields136e6582012-05-12 20:37:23 -04001624 if (update) {
1625 if (!clp_used_exchangeid(conf)) { /* buggy client */
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001626 status = nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03001627 goto out;
1628 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001629 if (!creds_match) { /* case 9 */
Andy Adamson0733d212009-04-03 08:28:01 +03001630 status = nfserr_perm;
1631 goto out;
1632 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001633 if (!verfs_match) { /* case 8 */
Andy Adamson0733d212009-04-03 08:28:01 +03001634 status = nfserr_not_same;
1635 goto out;
1636 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001637 /* case 6 */
1638 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1639 new = conf;
1640 goto out_copy;
Andy Adamson0733d212009-04-03 08:28:01 +03001641 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001642 if (!creds_match) { /* case 3 */
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04001643 if (client_has_state(conf)) {
1644 status = nfserr_clid_inuse;
1645 goto out;
1646 }
Andy Adamson0733d212009-04-03 08:28:01 +03001647 expire_client(conf);
1648 goto out_new;
1649 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04001650 if (verfs_match) { /* case 2 */
J. Bruce Fields0f1ba0e2012-05-25 21:24:40 -04001651 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04001652 new = conf;
1653 goto out_copy;
1654 }
1655 /* case 5, client reboot */
J. Bruce Fields136e6582012-05-12 20:37:23 -04001656 goto out_new;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001657 }
1658
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001659 if (update) { /* case 7 */
Mike Sager6ddbbbf2009-06-16 04:20:47 +03001660 status = nfserr_noent;
1661 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001662 }
1663
J. Bruce Fieldse203d502010-11-24 17:30:54 -05001664 unconf = find_unconfirmed_client_by_str(dname, strhashval);
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001665 if (unconf) /* case 4, possible retry or client restart */
Andy Adamson0733d212009-04-03 08:28:01 +03001666 expire_client(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03001667
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04001668 /* case 1 (normal case) */
Andy Adamson0733d212009-04-03 08:28:01 +03001669out_new:
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001670 new = create_client(exid->clname, dname, rqstp, &verf);
Andy Adamson0733d212009-04-03 08:28:01 +03001671 if (new == NULL) {
J. Bruce Fields47310302010-06-22 16:17:12 -04001672 status = nfserr_jukebox;
Andy Adamson0733d212009-04-03 08:28:01 +03001673 goto out;
1674 }
J. Bruce Fieldsc116a0a2012-09-11 14:53:09 -04001675 new->cl_minorversion = 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001676
Andy Adamson0733d212009-04-03 08:28:01 +03001677 gen_clid(new);
Andy Adamson0733d212009-04-03 08:28:01 +03001678 add_to_unconfirmed(new, strhashval);
1679out_copy:
1680 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1681 exid->clientid.cl_id = new->cl_clientid.cl_id;
1682
J. Bruce Fields778df3f2012-05-25 21:40:23 -04001683 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
Andy Adamson0733d212009-04-03 08:28:01 +03001684 nfsd4_set_ex_flags(new, exid);
1685
1686 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Andy Adamson49557cc2009-07-23 19:02:16 -04001687 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03001688 status = nfs_ok;
1689
1690out:
1691 nfs4_unlock_state();
Andy Adamson0733d212009-04-03 08:28:01 +03001692 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001693}
1694
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001695static __be32
Andy Adamson88e588d2009-07-23 19:02:15 -04001696check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001697{
Andy Adamson88e588d2009-07-23 19:02:15 -04001698 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1699 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001700
1701 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04001702 if (slot_inuse) {
1703 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001704 return nfserr_jukebox;
1705 else
1706 return nfserr_seq_misordered;
1707 }
J. Bruce Fieldsf6d82482012-02-13 16:13:41 -05001708 /* Note unsigned 32-bit arithmetic handles wraparound: */
Andy Adamson88e588d2009-07-23 19:02:15 -04001709 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03001710 return nfs_ok;
Andy Adamson88e588d2009-07-23 19:02:15 -04001711 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03001712 return nfserr_replay_cache;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001713 return nfserr_seq_misordered;
1714}
1715
Andy Adamson49557cc2009-07-23 19:02:16 -04001716/*
1717 * Cache the create session result into the create session single DRC
1718 * slot cache by saving the xdr structure. sl_seqid has been set.
1719 * Do this for solo or embedded create session operations.
1720 */
1721static void
1722nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001723 struct nfsd4_clid_slot *slot, __be32 nfserr)
Andy Adamson49557cc2009-07-23 19:02:16 -04001724{
1725 slot->sl_status = nfserr;
1726 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1727}
1728
1729static __be32
1730nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1731 struct nfsd4_clid_slot *slot)
1732{
1733 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1734 return slot->sl_status;
1735}
1736
Mi Jinlong1b74c252011-07-14 14:50:17 +08001737#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1738 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1739 1 + /* MIN tag is length with zero, only length */ \
1740 3 + /* version, opcount, opcode */ \
1741 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1742 /* seqid, slotID, slotID, cache */ \
1743 4 ) * sizeof(__be32))
1744
1745#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1746 2 + /* verifier: AUTH_NULL, length 0 */\
1747 1 + /* status */ \
1748 1 + /* MIN tag is length with zero, only length */ \
1749 3 + /* opcount, opcode, opstatus*/ \
1750 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1751 /* seqid, slotID, slotID, slotID, status */ \
1752 5 ) * sizeof(__be32))
1753
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001754static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel)
Mi Jinlong1b74c252011-07-14 14:50:17 +08001755{
1756 return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ
1757 || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ;
1758}
1759
Andy Adamson069b6ad2009-04-03 08:27:58 +03001760__be32
1761nfsd4_create_session(struct svc_rqst *rqstp,
1762 struct nfsd4_compound_state *cstate,
1763 struct nfsd4_create_session *cr_ses)
1764{
Jeff Layton363168b2009-08-14 12:57:56 -04001765 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001766 struct nfs4_client *conf, *unconf;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001767 struct nfsd4_session *new;
Andy Adamson49557cc2009-07-23 19:02:16 -04001768 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001769 bool confirm_me = false;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001770 __be32 status = 0;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001771
Mi Jinlonga62573d2011-03-23 17:57:07 +08001772 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
1773 return nfserr_inval;
J. Bruce Fields49730502012-09-11 15:33:21 -04001774 if (check_forechannel_attrs(cr_ses->fore_channel))
1775 return nfserr_toosmall;
Mi Jinlonga62573d2011-03-23 17:57:07 +08001776
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001777 nfs4_lock_state();
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04001778 unconf = find_unconfirmed_client(&cr_ses->clientid, true);
1779 conf = find_confirmed_client(&cr_ses->clientid, true);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001780
1781 if (conf) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001782 cs_slot = &conf->cl_cs_slot;
1783 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001784 if (status == nfserr_replay_cache) {
Andy Adamson49557cc2009-07-23 19:02:16 -04001785 status = nfsd4_replay_create_session(cr_ses, cs_slot);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001786 goto out;
Andy Adamson49557cc2009-07-23 19:02:16 -04001787 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001788 status = nfserr_seq_misordered;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001789 goto out;
1790 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001791 } else if (unconf) {
1792 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04001793 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001794 status = nfserr_clid_inuse;
1795 goto out;
1796 }
Andy Adamson49557cc2009-07-23 19:02:16 -04001797 cs_slot = &unconf->cl_cs_slot;
1798 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03001799 if (status) {
1800 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001801 status = nfserr_seq_misordered;
J. Bruce Fieldscd5b8142010-10-02 17:03:35 -04001802 goto out;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001803 }
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001804 confirm_me = true;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001805 conf = unconf;
1806 } else {
1807 status = nfserr_stale_clientid;
1808 goto out;
1809 }
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04001810 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04001811 * We do not support RDMA or persistent sessions
1812 */
1813 cr_ses->flags &= ~SESSION4_PERSIST;
1814 cr_ses->flags &= ~SESSION4_RDMA;
1815
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001816 status = nfserr_jukebox;
1817 new = alloc_init_session(rqstp, conf, cr_ses);
1818 if (!new)
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001819 goto out;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001820 status = nfs_ok;
1821 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001822 NFS4_MAX_SESSIONID_LEN);
Mi Jinlong12050652010-11-11 18:03:40 +08001823 memcpy(&cr_ses->fore_channel, &new->se_fchannel,
1824 sizeof(struct nfsd4_channel_attrs));
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001825 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04001826 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001827
Andy Adamson49557cc2009-07-23 19:02:16 -04001828 /* cache solo and embedded create sessions under the state lock */
1829 nfsd4_cache_create_session(cr_ses, cs_slot, status);
J. Bruce Fieldsb9831b52012-05-29 14:44:28 -04001830 if (confirm_me) {
1831 unsigned int hash = clientstr_hashval(unconf->cl_recdir);
1832 struct nfs4_client *old =
1833 find_confirmed_client_by_str(conf->cl_recdir, hash);
1834 if (old)
1835 expire_client(old);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04001836 move_to_confirmed(conf);
J. Bruce Fieldsb9831b52012-05-29 14:44:28 -04001837 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001838out:
1839 nfs4_unlock_state();
1840 dprintk("%s returns %d\n", __func__, ntohl(status));
1841 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001842}
1843
J. Bruce Fields57716352010-04-21 12:27:19 -04001844static bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
1845{
1846 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1847 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1848
1849 return argp->opcnt == resp->opcnt;
1850}
1851
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001852static __be32 nfsd4_map_bcts_dir(u32 *dir)
1853{
1854 switch (*dir) {
1855 case NFS4_CDFC4_FORE:
1856 case NFS4_CDFC4_BACK:
1857 return nfs_ok;
1858 case NFS4_CDFC4_FORE_OR_BOTH:
1859 case NFS4_CDFC4_BACK_OR_BOTH:
1860 *dir = NFS4_CDFC4_BOTH;
1861 return nfs_ok;
1862 };
1863 return nfserr_inval;
1864}
1865
1866__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
1867 struct nfsd4_compound_state *cstate,
1868 struct nfsd4_bind_conn_to_session *bcts)
1869{
1870 __be32 status;
1871
1872 if (!nfsd4_last_compound_op(rqstp))
1873 return nfserr_not_only_op;
1874 spin_lock(&client_lock);
1875 cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid);
1876 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1877 * client_lock iself: */
1878 if (cstate->session) {
1879 nfsd4_get_session(cstate->session);
1880 atomic_inc(&cstate->session->se_client->cl_refcount);
1881 }
1882 spin_unlock(&client_lock);
1883 if (!cstate->session)
1884 return nfserr_badsession;
1885
1886 status = nfsd4_map_bcts_dir(&bcts->dir);
Bryan Schumaker1db2b9d2011-04-27 15:47:15 -04001887 if (!status)
1888 nfsd4_new_conn(rqstp, cstate->session, bcts->dir);
1889 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001890}
1891
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001892static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
1893{
1894 if (!session)
1895 return 0;
1896 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
1897}
1898
Andy Adamson069b6ad2009-04-03 08:27:58 +03001899__be32
1900nfsd4_destroy_session(struct svc_rqst *r,
1901 struct nfsd4_compound_state *cstate,
1902 struct nfsd4_destroy_session *sessionid)
1903{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001904 struct nfsd4_session *ses;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04001905 __be32 status = nfserr_badsession;
Benny Halevye10e0cf2009-04-03 08:28:38 +03001906
1907 /* Notes:
1908 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1909 * - Should we return nfserr_back_chan_busy if waiting for
1910 * callbacks on to-be-destroyed session?
1911 * - Do we need to clear any callback info from previous session?
1912 */
1913
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04001914 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04001915 if (!nfsd4_last_compound_op(r))
1916 return nfserr_not_only_op;
1917 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03001918 dump_sessionid(__func__, &sessionid->sessionid);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001919 spin_lock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001920 ses = find_in_sessionid_hashtbl(&sessionid->sessionid);
1921 if (!ses) {
Benny Halevy9089f1b2010-05-12 00:12:26 +03001922 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001923 goto out;
1924 }
1925
1926 unhash_session(ses);
Benny Halevy9089f1b2010-05-12 00:12:26 +03001927 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001928
Benny Halevyab707e152010-05-12 00:14:06 +03001929 nfs4_lock_state();
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05001930 nfsd4_probe_callback_sync(ses->se_client);
Benny Halevyab707e152010-05-12 00:14:06 +03001931 nfs4_unlock_state();
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001932
Benny Halevy508dc6e2012-02-23 17:40:52 -08001933 spin_lock(&client_lock);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001934 nfsd4_del_conns(ses);
Benny Halevy508dc6e2012-02-23 17:40:52 -08001935 nfsd4_put_session_locked(ses);
1936 spin_unlock(&client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03001937 status = nfs_ok;
1938out:
1939 dprintk("%s returns %d\n", __func__, ntohl(status));
1940 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03001941}
1942
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001943static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001944{
1945 struct nfsd4_conn *c;
1946
1947 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001948 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04001949 return c;
1950 }
1951 }
1952 return NULL;
1953}
1954
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001955static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04001956{
1957 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001958 struct nfsd4_conn *c;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001959 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04001960
1961 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04001962 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001963 if (c) {
1964 spin_unlock(&clp->cl_lock);
1965 free_conn(new);
1966 return;
1967 }
1968 __nfsd4_hash_conn(new, ses);
1969 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001970 ret = nfsd4_register_conn(new);
1971 if (ret)
1972 /* oops; xprt is already down: */
1973 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001974 return;
1975}
1976
Mi Jinlong868b89c2011-04-27 09:09:58 +08001977static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
1978{
1979 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1980
1981 return args->opcnt > session->se_fchannel.maxops;
1982}
1983
Mi Jinlongae82a8d2011-07-14 14:56:02 +08001984static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
1985 struct nfsd4_session *session)
1986{
1987 struct xdr_buf *xb = &rqstp->rq_arg;
1988
1989 return xb->len > session->se_fchannel.maxreq_sz;
1990}
1991
Andy Adamson069b6ad2009-04-03 08:27:58 +03001992__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03001993nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03001994 struct nfsd4_compound_state *cstate,
1995 struct nfsd4_sequence *seq)
1996{
Andy Adamsonf9bb94c42009-04-03 08:28:12 +03001997 struct nfsd4_compoundres *resp = rqstp->rq_resp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03001998 struct nfsd4_session *session;
1999 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002000 struct nfsd4_conn *conn;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002001 __be32 status;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002002
Andy Adamsonf9bb94c42009-04-03 08:28:12 +03002003 if (resp->opcnt != 1)
2004 return nfserr_sequence_pos;
2005
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002006 /*
2007 * Will be either used or freed by nfsd4_sequence_check_conn
2008 * below.
2009 */
2010 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2011 if (!conn)
2012 return nfserr_jukebox;
2013
Benny Halevy9089f1b2010-05-12 00:12:26 +03002014 spin_lock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002015 status = nfserr_badsession;
2016 session = find_in_sessionid_hashtbl(&seq->sessionid);
2017 if (!session)
2018 goto out;
2019
Mi Jinlong868b89c2011-04-27 09:09:58 +08002020 status = nfserr_too_many_ops;
2021 if (nfsd4_session_too_many_ops(rqstp, session))
2022 goto out;
2023
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002024 status = nfserr_req_too_big;
2025 if (nfsd4_request_too_big(rqstp, session))
2026 goto out;
2027
Benny Halevyb85d4c02009-04-03 08:28:08 +03002028 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03002029 if (seq->slotid >= session->se_fchannel.maxreqs)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002030 goto out;
2031
Andy Adamson557ce262009-08-28 08:45:04 -04002032 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03002033 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2034
Andy Adamsona8dfdae2009-08-28 08:45:02 -04002035 /* We do not negotiate the number of slots yet, so set the
2036 * maxslots to the session maxreqs which is used to encode
2037 * sr_highest_slotid and the sr_target_slot id to maxslots */
2038 seq->maxslots = session->se_fchannel.maxreqs;
2039
J. Bruce Fields73e79482012-02-13 16:39:00 -05002040 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2041 slot->sl_flags & NFSD4_SLOT_INUSE);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002042 if (status == nfserr_replay_cache) {
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002043 status = nfserr_seq_misordered;
2044 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
2045 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002046 cstate->slot = slot;
2047 cstate->session = session;
Andy Adamsonda3846a2009-04-03 08:28:22 +03002048 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04002049 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03002050 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03002051 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002052 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002053 }
2054 if (status)
2055 goto out;
2056
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002057 nfsd4_sequence_check_conn(conn, session);
2058 conn = NULL;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002059
Benny Halevyb85d4c02009-04-03 08:28:08 +03002060 /* Success! bump slot seqid */
Benny Halevyb85d4c02009-04-03 08:28:08 +03002061 slot->sl_seqid = seq->seqid;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002062 slot->sl_flags |= NFSD4_SLOT_INUSE;
J. Bruce Fields73e79482012-02-13 16:39:00 -05002063 if (seq->cachethis)
2064 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002065 else
2066 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002067
2068 cstate->slot = slot;
2069 cstate->session = session;
2070
Benny Halevyb85d4c02009-04-03 08:28:08 +03002071out:
J. Bruce Fields26c0c752010-04-24 15:35:43 -04002072 /* Hold a session reference until done processing the compound. */
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002073 if (cstate->session) {
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05002074 struct nfs4_client *clp = session->se_client;
2075
Benny Halevy36acb662010-05-12 00:13:04 +03002076 nfsd4_get_session(cstate->session);
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05002077 atomic_inc(&clp->cl_refcount);
Benny Halevy54237322011-10-19 19:12:58 -07002078 switch (clp->cl_cb_state) {
2079 case NFSD4_CB_DOWN:
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07002080 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
Benny Halevy54237322011-10-19 19:12:58 -07002081 break;
2082 case NFSD4_CB_FAULT:
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07002083 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
Benny Halevy54237322011-10-19 19:12:58 -07002084 break;
Benny Halevyfc0c3dd2011-10-19 19:13:06 -07002085 default:
2086 seq->status_flags = 0;
Benny Halevy54237322011-10-19 19:12:58 -07002087 }
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002088 }
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002089 kfree(conn);
Benny Halevy36acb662010-05-12 00:13:04 +03002090 spin_unlock(&client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002091 dprintk("%s: return %d\n", __func__, ntohl(status));
2092 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002093}
2094
Mi Jinlong345c2842011-10-20 17:51:39 +08002095__be32
2096nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2097{
2098 struct nfs4_client *conf, *unconf, *clp;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002099 __be32 status = 0;
Mi Jinlong345c2842011-10-20 17:51:39 +08002100
2101 nfs4_lock_state();
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002102 unconf = find_unconfirmed_client(&dc->clientid, true);
2103 conf = find_confirmed_client(&dc->clientid, true);
Mi Jinlong345c2842011-10-20 17:51:39 +08002104
2105 if (conf) {
2106 clp = conf;
2107
J. Bruce Fields6eccece2012-05-29 16:37:44 -04002108 if (!is_client_expired(conf) && client_has_state(conf)) {
Mi Jinlong345c2842011-10-20 17:51:39 +08002109 status = nfserr_clientid_busy;
2110 goto out;
2111 }
2112
2113 /* rfc5661 18.50.3 */
2114 if (cstate->session && conf == cstate->session->se_client) {
2115 status = nfserr_clientid_busy;
2116 goto out;
2117 }
2118 } else if (unconf)
2119 clp = unconf;
2120 else {
2121 status = nfserr_stale_clientid;
2122 goto out;
2123 }
2124
2125 expire_client(clp);
2126out:
2127 nfs4_unlock_state();
2128 dprintk("%s return %d\n", __func__, ntohl(status));
2129 return status;
2130}
2131
Andy Adamson069b6ad2009-04-03 08:27:58 +03002132__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002133nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2134{
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002135 __be32 status = 0;
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002136
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002137 if (rc->rca_one_fs) {
2138 if (!cstate->current_fh.fh_dentry)
2139 return nfserr_nofilehandle;
2140 /*
2141 * We don't take advantage of the rca_one_fs case.
2142 * That's OK, it's optional, we can safely ignore it.
2143 */
2144 return nfs_ok;
2145 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002146
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002147 nfs4_lock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002148 status = nfserr_complete_already;
Jeff Laytona52d7262012-03-21 09:52:02 -04002149 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2150 &cstate->session->se_client->cl_flags))
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002151 goto out;
2152
2153 status = nfserr_stale_clientid;
2154 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002155 /*
2156 * The following error isn't really legal.
2157 * But we only get here if the client just explicitly
2158 * destroyed the client. Surely it no longer cares what
2159 * error it gets back on an operation for the dead
2160 * client.
2161 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002162 goto out;
2163
2164 status = nfs_ok;
Jeff Layton2a4317c2012-03-21 16:42:43 -04002165 nfsd4_client_record_create(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002166out:
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002167 nfs4_unlock_state();
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002168 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002169}
2170
2171__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002172nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2173 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002175 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 nfs4_verifier clverifier = setclid->se_verf;
2177 unsigned int strhashval;
NeilBrown28ce6052005-06-23 22:03:56 -07002178 struct nfs4_client *conf, *unconf, *new;
Al Virob37ad282006-10-19 23:28:59 -07002179 __be32 status;
NeilBrowna55370a2005-06-23 22:03:52 -07002180 char dname[HEXDIR_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181
NeilBrowna55370a2005-06-23 22:03:52 -07002182 status = nfs4_make_rec_clidname(dname, &clname);
2183 if (status)
Neil Brown73aea4e2005-09-13 01:25:39 -07002184 return status;
NeilBrowna55370a2005-06-23 22:03:52 -07002185
NeilBrowna55370a2005-06-23 22:03:52 -07002186 strhashval = clientstr_hashval(dname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187
J. Bruce Fields63db4632012-05-18 21:54:19 -04002188 /* Cases below refer to rfc 3530 section 14.2.33: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189 nfs4_lock_state();
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002190 conf = find_confirmed_client_by_str(dname, strhashval);
NeilBrown28ce6052005-06-23 22:03:56 -07002191 if (conf) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04002192 /* case 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002194 if (clp_used_exchangeid(conf))
2195 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04002196 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04002197 char addr_str[INET6_ADDRSTRLEN];
2198 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2199 sizeof(addr_str));
2200 dprintk("NFSD: setclientid: string in use by client "
2201 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202 goto out;
2203 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 }
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002205 unconf = find_unconfirmed_client_by_str(dname, strhashval);
J. Bruce Fields8f930712012-05-18 22:06:41 -04002206 if (unconf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 status = nfserr_jukebox;
J. Bruce Fields8f930712012-05-18 22:06:41 -04002209 new = create_client(clname, dname, rqstp, &clverifier);
2210 if (new == NULL)
2211 goto out;
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002212 if (conf && same_verf(&conf->cl_verifier, &clverifier))
J. Bruce Fields63db4632012-05-18 21:54:19 -04002213 /* case 1: probable callback update */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 copy_clid(new, conf);
J. Bruce Fields34b232b2012-05-18 22:23:42 -04002215 else /* case 4 (new client) or cases 2, 3 (client reboot): */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216 gen_clid(new);
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002217 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002218 gen_callback(new, setclid, rqstp);
J. Bruce Fieldsc175b832007-08-09 18:34:32 -04002219 add_to_unconfirmed(new, strhashval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2221 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2222 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2223 status = nfs_ok;
2224out:
2225 nfs4_unlock_state();
2226 return status;
2227}
2228
2229
Al Virob37ad282006-10-19 23:28:59 -07002230__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08002231nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2232 struct nfsd4_compound_state *cstate,
2233 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234{
NeilBrown21ab45a2005-06-23 22:04:14 -07002235 struct nfs4_client *conf, *unconf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2237 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07002238 __be32 status;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002239 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002241 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 return nfserr_stale_clientid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 nfs4_lock_state();
NeilBrown21ab45a2005-06-23 22:04:14 -07002244
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002245 conf = find_confirmed_client(clid, false);
2246 unconf = find_unconfirmed_client(clid, false);
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002247 /*
J. Bruce Fields8695b902012-05-19 10:05:58 -04002248 * We try hard to give out unique clientid's, so if we get an
2249 * attempt to confirm the same clientid with a different cred,
2250 * there's a bug somewhere. Let's charitably assume it's our
2251 * bug.
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05002252 */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002253 status = nfserr_serverfault;
2254 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2255 goto out;
2256 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2257 goto out;
J. Bruce Fields63db4632012-05-18 21:54:19 -04002258 /* cases below refer to rfc 3530 section 14.2.34: */
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002259 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2260 if (conf && !unconf) /* case 2: probable retransmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 status = nfs_ok;
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002262 else /* case 4: client hasn't noticed we rebooted yet? */
2263 status = nfserr_stale_clientid;
2264 goto out;
2265 }
2266 status = nfs_ok;
2267 if (conf) { /* case 1: callback update */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002268 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2269 nfsd4_probe_callback(conf);
2270 expire_client(unconf);
J. Bruce Fields90d700b2012-05-19 13:55:22 -04002271 } else { /* case 3: normal case; new or rebooted client */
J. Bruce Fields8695b902012-05-19 10:05:58 -04002272 unsigned int hash = clientstr_hashval(unconf->cl_recdir);
NeilBrown1a69c172005-06-23 22:04:08 -07002273
J. Bruce Fields8695b902012-05-19 10:05:58 -04002274 conf = find_confirmed_client_by_str(unconf->cl_recdir, hash);
2275 if (conf) {
2276 nfsd4_client_record_remove(conf);
2277 expire_client(conf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 }
J. Bruce Fields8695b902012-05-19 10:05:58 -04002279 move_to_confirmed(unconf);
J. Bruce Fieldsf3d03b92012-05-23 11:38:38 -04002280 nfsd4_probe_callback(unconf);
NeilBrown08e89872005-06-23 22:04:11 -07002281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 nfs4_unlock_state();
2284 return status;
2285}
2286
J. Bruce Fields32513b42011-10-13 16:00:16 -04002287static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288{
J. Bruce Fields32513b42011-10-13 16:00:16 -04002289 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2290}
2291
2292/* OPEN Share state helper functions */
2293static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2294{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 unsigned int hashval = file_hashval(ino);
2296
J. Bruce Fields32513b42011-10-13 16:00:16 -04002297 atomic_set(&fp->fi_ref, 1);
2298 INIT_LIST_HEAD(&fp->fi_hash);
2299 INIT_LIST_HEAD(&fp->fi_stateids);
2300 INIT_LIST_HEAD(&fp->fi_delegations);
2301 fp->fi_inode = igrab(ino);
2302 fp->fi_had_conflict = false;
2303 fp->fi_lease = NULL;
2304 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2305 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2306 spin_lock(&recall_lock);
2307 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
2308 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309}
2310
2311static void
Christoph Lametere18b8902006-12-06 20:33:20 -08002312nfsd4_free_slab(struct kmem_cache **slab)
NeilBrowne60d4392005-06-23 22:03:01 -07002313{
NeilBrowne60d4392005-06-23 22:03:01 -07002314 if (*slab == NULL)
2315 return;
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07002316 kmem_cache_destroy(*slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002317 *slab = NULL;
NeilBrowne60d4392005-06-23 22:03:01 -07002318}
2319
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04002320void
NeilBrowne60d4392005-06-23 22:03:01 -07002321nfsd4_free_slabs(void)
2322{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002323 nfsd4_free_slab(&openowner_slab);
2324 nfsd4_free_slab(&lockowner_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002325 nfsd4_free_slab(&file_slab);
NeilBrown5ac049a2005-06-23 22:03:03 -07002326 nfsd4_free_slab(&stateid_slab);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002327 nfsd4_free_slab(&deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07002328}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329
Bryan Schumaker72083392011-11-01 15:24:59 -04002330int
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331nfsd4_init_slabs(void)
2332{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002333 openowner_slab = kmem_cache_create("nfsd4_openowners",
2334 sizeof(struct nfs4_openowner), 0, 0, NULL);
2335 if (openowner_slab == NULL)
2336 goto out_nomem;
2337 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
2338 sizeof(struct nfs4_openowner), 0, 0, NULL);
2339 if (lockowner_slab == NULL)
NeilBrowne60d4392005-06-23 22:03:01 -07002340 goto out_nomem;
2341 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09002342 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07002343 if (file_slab == NULL)
2344 goto out_nomem;
NeilBrown5ac049a2005-06-23 22:03:03 -07002345 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002346 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07002347 if (stateid_slab == NULL)
2348 goto out_nomem;
NeilBrown5b2d21c2005-06-23 22:03:04 -07002349 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09002350 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07002351 if (deleg_slab == NULL)
2352 goto out_nomem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 return 0;
NeilBrowne60d4392005-06-23 22:03:01 -07002354out_nomem:
2355 nfsd4_free_slabs();
2356 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2357 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358}
2359
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002360void nfs4_free_openowner(struct nfs4_openowner *oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002362 kfree(oo->oo_owner.so_owner.data);
2363 kmem_cache_free(openowner_slab, oo);
2364}
2365
2366void nfs4_free_lockowner(struct nfs4_lockowner *lo)
2367{
2368 kfree(lo->lo_owner.so_owner.data);
2369 kmem_cache_free(lockowner_slab, lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370}
2371
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002372static void init_nfs4_replay(struct nfs4_replay *rp)
2373{
2374 rp->rp_status = nfserr_serverfault;
2375 rp->rp_buflen = 0;
2376 rp->rp_buf = rp->rp_ibuf;
2377}
2378
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002379static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380{
2381 struct nfs4_stateowner *sop;
2382
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002383 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002384 if (!sop)
2385 return NULL;
2386
2387 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2388 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002389 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002390 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002392 sop->so_owner.len = owner->len;
2393
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002394 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002395 sop->so_client = clp;
2396 init_nfs4_replay(&sop->so_replay);
2397 return sop;
2398}
2399
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002400static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04002401{
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002402 list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002403 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404}
2405
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002406static struct nfs4_openowner *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002408 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002410 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2411 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002413 oo->oo_owner.so_is_open_owner = 1;
2414 oo->oo_owner.so_seqid = open->op_seqid;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04002415 oo->oo_flags = NFS4_OO_NEW;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002416 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04002417 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002418 INIT_LIST_HEAD(&oo->oo_close_lru);
2419 hash_openowner(oo, clp, strhashval);
2420 return oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421}
2422
J. Bruce Fields996e0932011-10-17 11:14:48 -04002423static 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 -04002424 struct nfs4_openowner *oo = open->op_openowner;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04002425 struct nfs4_client *clp = oo->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426
J. Bruce Fields996e0932011-10-17 11:14:48 -04002427 init_stid(&stp->st_stid, clp, NFS4_OPEN_STID);
NeilBrownea1da632005-06-23 22:04:17 -07002428 INIT_LIST_HEAD(&stp->st_lockowners);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002429 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
NeilBrown8beefa22005-06-23 22:03:08 -07002430 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002431 stp->st_stateowner = &oo->oo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07002432 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 stp->st_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434 stp->st_access_bmap = 0;
2435 stp->st_deny_bmap = 0;
Jeff Layton82c5ff12012-05-11 09:45:13 -04002436 set_access(open->op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04002437 set_deny(open->op_share_deny, stp);
NeilBrown4c4cd222005-07-07 17:59:27 -07002438 stp->st_openstp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439}
2440
2441static void
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002442move_to_close_lru(struct nfs4_openowner *oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002444 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002446 list_move_tail(&oo->oo_close_lru, &close_lru);
2447 oo->oo_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448}
2449
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04002451same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2452 clientid_t *clid)
2453{
2454 return (sop->so_owner.len == owner->len) &&
2455 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2456 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457}
2458
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002459static struct nfs4_openowner *
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002460find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461{
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002462 struct nfs4_stateowner *so;
2463 struct nfs4_openowner *oo;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002464 struct nfs4_client *clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002466 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
2467 if (!so->so_is_open_owner)
2468 continue;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002469 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2470 oo = openowner(so);
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002471 clp = oo->oo_owner.so_client;
2472 if ((bool)clp->cl_minorversion != sessions)
2473 return NULL;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002474 renew_client(oo->oo_owner.so_client);
2475 return oo;
2476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477 }
2478 return NULL;
2479}
2480
2481/* search file_hashtbl[] for file */
2482static struct nfs4_file *
2483find_file(struct inode *ino)
2484{
2485 unsigned int hashval = file_hashval(ino);
2486 struct nfs4_file *fp;
2487
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002488 spin_lock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
NeilBrown13cd2182005-06-23 22:03:10 -07002490 if (fp->fi_inode == ino) {
2491 get_nfs4_file(fp);
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002492 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07002494 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 }
J. Bruce Fields8b671b82009-02-22 14:51:34 -08002496 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 return NULL;
2498}
2499
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04002500/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 * Called to check deny when READ with all zero stateid or
2502 * WRITE with all zero or all one stateid
2503 */
Al Virob37ad282006-10-19 23:28:59 -07002504static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2506{
2507 struct inode *ino = current_fh->fh_dentry->d_inode;
2508 struct nfs4_file *fp;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002509 struct nfs4_ol_stateid *stp;
Al Virob37ad282006-10-19 23:28:59 -07002510 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511
2512 dprintk("NFSD: nfs4_share_conflict\n");
2513
2514 fp = find_file(ino);
NeilBrown13cd2182005-06-23 22:03:10 -07002515 if (!fp)
2516 return nfs_ok;
NeilBrownb7009492005-07-07 17:59:23 -07002517 ret = nfserr_locked;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518 /* Search for conflicting share reservations */
NeilBrown13cd2182005-06-23 22:03:10 -07002519 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
Jeff Laytonce0fc432012-05-11 09:45:14 -04002520 if (test_deny(deny_type, stp) ||
2521 test_deny(NFS4_SHARE_DENY_BOTH, stp))
NeilBrown13cd2182005-06-23 22:03:10 -07002522 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 }
NeilBrown13cd2182005-06-23 22:03:10 -07002524 ret = nfs_ok;
2525out:
2526 put_nfs4_file(fp);
2527 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528}
2529
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002530static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 /* We're assuming the state code never drops its reference
2533 * without first removing the lease. Since we're in this lease
2534 * callback (and since the lease code is serialized by the kernel
2535 * lock) we know the server hasn't removed the lease yet, we know
2536 * it's safe to take a reference: */
2537 atomic_inc(&dp->dl_count);
2538
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540
Arnd Bergmann460781b2010-11-17 16:26:56 +01002541 /* only place dl_time is set. protected by lock_flocks*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542 dp->dl_time = get_seconds();
2543
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002544 nfsd4_cb_recall(dp);
2545}
2546
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002547/* Called from break_lease() with lock_flocks() held. */
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002548static void nfsd_break_deleg_cb(struct file_lock *fl)
2549{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002550 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
2551 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002552
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002553 BUG_ON(!fp);
2554 /* We assume break_lease is only called once per lease: */
2555 BUG_ON(fp->fi_had_conflict);
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002556 /*
2557 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002558 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05002559 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04002560 */
2561 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002563 spin_lock(&recall_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002564 fp->fi_had_conflict = true;
2565 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
2566 nfsd_break_one_deleg(dp);
J. Bruce Fields5d926e82011-02-07 16:53:46 -05002567 spin_unlock(&recall_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568}
2569
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570static
2571int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2572{
2573 if (arg & F_UNLCK)
2574 return lease_modify(onlist, arg);
2575 else
2576 return -EAGAIN;
2577}
2578
Alexey Dobriyan7b021962009-09-21 17:01:12 -07002579static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04002580 .lm_break = nfsd_break_deleg_cb,
2581 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582};
2583
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04002584static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
2585{
2586 if (nfsd4_has_session(cstate))
2587 return nfs_ok;
2588 if (seqid == so->so_seqid - 1)
2589 return nfserr_replay_me;
2590 if (seqid == so->so_seqid)
2591 return nfs_ok;
2592 return nfserr_bad_seqid;
2593}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594
Al Virob37ad282006-10-19 23:28:59 -07002595__be32
Andy Adamson66689582009-04-03 08:28:45 +03002596nfsd4_process_open1(struct nfsd4_compound_state *cstate,
2597 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 clientid_t *clientid = &open->op_clientid;
2600 struct nfs4_client *clp = NULL;
2601 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002602 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002603 __be32 status;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002604 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04002606 if (STALE_CLIENTID(&open->op_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04002608 /*
2609 * In case we need it later, after we've already created the
2610 * file and don't want to risk a further failure:
2611 */
2612 open->op_file = nfsd4_alloc_file();
2613 if (open->op_file == NULL)
2614 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05002616 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002617 oo = find_openstateowner_str(strhashval, open, cstate->minorversion);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002618 open->op_openowner = oo;
2619 if (!oo) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002620 clp = find_confirmed_client(clientid, cstate->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 if (clp == NULL)
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002622 return nfserr_expired;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002623 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002625 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002626 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002627 clp = oo->oo_owner.so_client;
2628 release_openowner(oo);
2629 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002630 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002631 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002632 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
2633 if (status)
2634 return status;
2635 clp = oo->oo_owner.so_client;
2636 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04002637new_owner:
2638 oo = alloc_init_open_stateowner(strhashval, clp, open);
2639 if (oo == NULL)
2640 return nfserr_jukebox;
2641 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04002642alloc_stateid:
2643 open->op_stp = nfs4_alloc_stateid(clp);
2644 if (!open->op_stp)
2645 return nfserr_jukebox;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08002646 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647}
2648
Al Virob37ad282006-10-19 23:28:59 -07002649static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07002650nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
2651{
2652 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
2653 return nfserr_openmode;
2654 else
2655 return nfs_ok;
2656}
2657
Daniel Mackc47d8322011-05-16 16:38:14 +02002658static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04002659{
J. Bruce Fields24a01112010-05-18 20:01:35 -04002660 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
2661}
2662
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002663static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002664{
2665 struct nfs4_stid *ret;
2666
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002667 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04002668 if (!ret)
2669 return NULL;
2670 return delegstateid(ret);
2671}
2672
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002673static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
2674{
2675 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
2676 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
2677}
2678
Al Virob37ad282006-10-19 23:28:59 -07002679static __be32
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002680nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07002681 struct nfs4_delegation **dp)
2682{
2683 int flags;
Al Virob37ad282006-10-19 23:28:59 -07002684 __be32 status = nfserr_bad_stateid;
NeilBrown567d9822005-06-23 22:02:53 -07002685
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002686 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
NeilBrown567d9822005-06-23 22:02:53 -07002687 if (*dp == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07002688 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04002689 flags = share_access_to_flags(open->op_share_access);
NeilBrown567d9822005-06-23 22:02:53 -07002690 status = nfs4_check_delegmode(*dp, flags);
2691 if (status)
2692 *dp = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002693out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04002694 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07002695 return nfs_ok;
2696 if (status)
2697 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002698 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07002699 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07002700}
2701
Al Virob37ad282006-10-19 23:28:59 -07002702static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002703nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002704{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002705 struct nfs4_ol_stateid *local;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002706 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707
NeilBrown8beefa22005-06-23 22:03:08 -07002708 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 /* ignore lock owners */
2710 if (local->st_stateowner->so_is_open_owner == 0)
2711 continue;
2712 /* remember if we have seen this open owner */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002713 if (local->st_stateowner == &oo->oo_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714 *stpp = local;
2715 /* check for conflicting share reservations */
2716 if (!test_share(local, open))
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002717 return nfserr_share_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718 }
J. Bruce Fields77eaae82011-09-02 12:08:20 -04002719 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720}
2721
J. Bruce Fields21fb4012010-07-28 12:21:23 -04002722static inline int nfs4_access_to_access(u32 nfs4_access)
2723{
2724 int flags = 0;
2725
2726 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
2727 flags |= NFSD_MAY_READ;
2728 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
2729 flags |= NFSD_MAY_WRITE;
2730 return flags;
2731}
2732
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002733static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
2734 struct svc_fh *cur_fh, struct nfsd4_open *open)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002735{
2736 __be32 status;
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002737 int oflag = nfs4_access_to_omode(open->op_share_access);
2738 int access = nfs4_access_to_access(open->op_share_access);
2739
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002740 if (!fp->fi_fds[oflag]) {
2741 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
2742 &fp->fi_fds[oflag]);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002743 if (status)
2744 return status;
2745 }
2746 nfs4_file_get_access(fp, oflag);
2747
2748 return nfs_ok;
2749}
2750
Al Virob37ad282006-10-19 23:28:59 -07002751static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
2753 struct nfsd4_open *open)
2754{
2755 struct iattr iattr = {
2756 .ia_valid = ATTR_SIZE,
2757 .ia_size = 0,
2758 };
2759 if (!open->op_truncate)
2760 return 0;
2761 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08002762 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
2764}
2765
Al Virob37ad282006-10-19 23:28:59 -07002766static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002767nfs4_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 -07002768{
J. Bruce Fieldsb6d2f1c2011-10-10 17:44:19 -04002769 u32 op_share_access = open->op_share_access;
J. Bruce Fields7d947842010-08-20 18:09:31 -04002770 bool new_access;
Al Virob37ad282006-10-19 23:28:59 -07002771 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772
Jeff Layton82c5ff12012-05-11 09:45:13 -04002773 new_access = !test_access(op_share_access, stp);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002774 if (new_access) {
Casey Bodley0c12eaf2011-07-23 14:58:10 -04002775 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002776 if (status)
2777 return status;
J. Bruce Fields6c26d082006-01-18 17:43:38 -08002778 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779 status = nfsd4_truncate(rqstp, cur_fh, open);
2780 if (status) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002781 if (new_access) {
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04002782 int oflag = nfs4_access_to_omode(op_share_access);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04002783 nfs4_file_put_access(fp, oflag);
2784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785 return status;
2786 }
2787 /* remember the open */
Jeff Layton82c5ff12012-05-11 09:45:13 -04002788 set_access(op_share_access, stp);
Jeff Laytonce0fc432012-05-11 09:45:14 -04002789 set_deny(open->op_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790
2791 return nfs_ok;
2792}
2793
2794
Linus Torvalds1da177e2005-04-16 15:20:36 -07002795static void
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05002796nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002797{
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002798 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002799}
2800
J. Bruce Fields14a24e92010-12-10 19:02:49 -05002801/* Should we give out recallable state?: */
2802static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
2803{
2804 if (clp->cl_cb_state == NFSD4_CB_UP)
2805 return true;
2806 /*
2807 * In the sessions case, since we don't have to establish a
2808 * separate connection for callbacks, we assume it's OK
2809 * until we hear otherwise:
2810 */
2811 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
2812}
2813
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002814static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
2815{
2816 struct file_lock *fl;
2817
2818 fl = locks_alloc_lock();
2819 if (!fl)
2820 return NULL;
2821 locks_init_lock(fl);
2822 fl->fl_lmops = &nfsd_lease_mng_ops;
2823 fl->fl_flags = FL_LEASE;
2824 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
2825 fl->fl_end = OFFSET_MAX;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002826 fl->fl_owner = (fl_owner_t)(dp->dl_file);
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002827 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05002828 return fl;
2829}
2830
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002831static int nfs4_setlease(struct nfs4_delegation *dp, int flag)
2832{
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002833 struct nfs4_file *fp = dp->dl_file;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002834 struct file_lock *fl;
2835 int status;
2836
2837 fl = nfs4_alloc_init_lease(dp, flag);
2838 if (!fl)
2839 return -ENOMEM;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002840 fl->fl_file = find_readable_file(fp);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -04002841 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002842 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002843 if (status) {
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002844 list_del_init(&dp->dl_perclnt);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002845 locks_free_lock(fl);
2846 return -ENOMEM;
2847 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002848 fp->fi_lease = fl;
2849 fp->fi_deleg_file = fl->fl_file;
2850 get_file(fp->fi_deleg_file);
2851 atomic_set(&fp->fi_delegees, 1);
2852 list_add(&dp->dl_perfile, &fp->fi_delegations);
2853 return 0;
2854}
2855
2856static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag)
2857{
2858 struct nfs4_file *fp = dp->dl_file;
2859
2860 if (!fp->fi_lease)
2861 return nfs4_setlease(dp, flag);
2862 spin_lock(&recall_lock);
2863 if (fp->fi_had_conflict) {
2864 spin_unlock(&recall_lock);
2865 return -EAGAIN;
2866 }
2867 atomic_inc(&fp->fi_delegees);
2868 list_add(&dp->dl_perfile, &fp->fi_delegations);
2869 spin_unlock(&recall_lock);
J. Bruce Fields2a74aba2011-09-23 17:20:02 -04002870 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002871 return 0;
2872}
2873
Benny Halevy4aa89132012-02-21 14:16:44 -08002874static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
2875{
2876 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
2877 if (status == -EAGAIN)
2878 open->op_why_no_deleg = WND4_CONTENTION;
2879 else {
2880 open->op_why_no_deleg = WND4_RESOURCE;
2881 switch (open->op_deleg_want) {
2882 case NFS4_SHARE_WANT_READ_DELEG:
2883 case NFS4_SHARE_WANT_WRITE_DELEG:
2884 case NFS4_SHARE_WANT_ANY_DELEG:
2885 break;
2886 case NFS4_SHARE_WANT_CANCEL:
2887 open->op_why_no_deleg = WND4_CANCELLED;
2888 break;
2889 case NFS4_SHARE_WANT_NO_DELEG:
2890 BUG(); /* not supposed to get here */
2891 }
2892 }
2893}
2894
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895/*
2896 * Attempt to hand out a delegation.
2897 */
2898static void
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04002899nfs4_open_delegation(struct net *net, struct svc_fh *fh,
2900 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901{
2902 struct nfs4_delegation *dp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002903 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
J. Bruce Fields14a24e92010-12-10 19:02:49 -05002904 int cb_up;
Benny Halevyd24433c2012-02-16 20:57:17 +02002905 int status = 0, flag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002907 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002908 flag = NFS4_OPEN_DELEGATE_NONE;
NeilBrown7b190fe2005-06-23 22:03:23 -07002909 open->op_recall = 0;
2910 switch (open->op_claim_type) {
2911 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05002912 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07002913 open->op_recall = 1;
2914 flag = open->op_delegate_type;
2915 if (flag == NFS4_OPEN_DELEGATE_NONE)
2916 goto out;
2917 break;
2918 case NFS4_OPEN_CLAIM_NULL:
2919 /* Let's not give out any delegations till everyone's
2920 * had the chance to reclaim theirs.... */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04002921 if (locks_in_grace(net))
NeilBrown7b190fe2005-06-23 22:03:23 -07002922 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04002923 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown7b190fe2005-06-23 22:03:23 -07002924 goto out;
2925 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
2926 flag = NFS4_OPEN_DELEGATE_WRITE;
2927 else
2928 flag = NFS4_OPEN_DELEGATE_READ;
2929 break;
2930 default:
2931 goto out;
2932 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04002934 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002935 if (dp == NULL)
2936 goto out_no_deleg;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002937 status = nfs4_set_delegation(dp, flag);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05002938 if (status)
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002939 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04002941 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942
Benny Halevy8c10cbd2009-10-19 12:04:53 +02002943 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04002944 STATEID_VAL(&dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945out:
2946 open->op_delegate_type = flag;
Benny Halevyd24433c2012-02-16 20:57:17 +02002947 if (flag == NFS4_OPEN_DELEGATE_NONE) {
2948 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
2949 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
2950 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2951
Benny Halevy4aa89132012-02-21 14:16:44 -08002952 /* 4.1 client asking for a delegation? */
2953 if (open->op_deleg_want)
2954 nfsd4_open_deleg_none_ext(open, status);
Benny Halevyd24433c2012-02-16 20:57:17 +02002955 }
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002956 return;
2957out_free:
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05002958 nfs4_put_delegation(dp);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05002959out_no_deleg:
2960 flag = NFS4_OPEN_DELEGATE_NONE;
2961 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962}
2963
Benny Halevye27f49c2012-02-21 14:16:54 -08002964static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
2965 struct nfs4_delegation *dp)
2966{
2967 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
2968 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
2969 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
2970 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
2971 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
2972 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
2973 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
2974 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
2975 }
2976 /* Otherwise the client must be confused wanting a delegation
2977 * it already has, therefore we don't return
2978 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
2979 */
2980}
2981
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982/*
2983 * called with nfs4_lock_state() held.
2984 */
Al Virob37ad282006-10-19 23:28:59 -07002985__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
2987{
Andy Adamson66689582009-04-03 08:28:45 +03002988 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04002989 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990 struct nfs4_file *fp = NULL;
2991 struct inode *ino = current_fh->fh_dentry->d_inode;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04002992 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07002993 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07002994 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996 /*
2997 * Lookup file; if found, lookup stateid and check open request,
2998 * and check for delegations in the process of being recalled.
2999 * If not found, create the nfs4_file struct
3000 */
3001 fp = find_file(ino);
3002 if (fp) {
3003 if ((status = nfs4_check_open(fp, open, &stp)))
3004 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003005 status = nfs4_check_deleg(cl, fp, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07003006 if (status)
3007 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008 } else {
NeilBrownc44c5ee2005-06-23 22:02:54 -07003009 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003010 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07003011 goto out;
J. Bruce Fields3e772462011-08-10 19:07:33 -04003012 status = nfserr_jukebox;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003013 fp = open->op_file;
3014 open->op_file = NULL;
3015 nfsd4_init_file(fp, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016 }
3017
3018 /*
3019 * OPEN the file, or upgrade an existing OPEN.
3020 * If truncate fails, the OPEN fails.
3021 */
3022 if (stp) {
3023 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003024 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025 if (status)
3026 goto out;
3027 } else {
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003028 status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
NeilBrown567d9822005-06-23 22:02:53 -07003029 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030 goto out;
J. Bruce Fields4af82502012-06-07 17:30:45 -04003031 status = nfsd4_truncate(rqstp, current_fh, open);
3032 if (status)
3033 goto out;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003034 stp = open->op_stp;
3035 open->op_stp = NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04003036 init_open_stateid(stp, fp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003037 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003038 update_stateid(&stp->st_stid.sc_stateid);
3039 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040
Benny Halevyd24433c2012-02-16 20:57:17 +02003041 if (nfsd4_has_session(&resp->cstate)) {
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003042 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Andy Adamson66689582009-04-03 08:28:45 +03003043
Benny Halevyd24433c2012-02-16 20:57:17 +02003044 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3045 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3046 open->op_why_no_deleg = WND4_NOT_WANTED;
3047 goto nodeleg;
3048 }
3049 }
3050
Linus Torvalds1da177e2005-04-16 15:20:36 -07003051 /*
3052 * Attempt to hand out a delegation. No error return, because the
3053 * OPEN succeeds even if we fail.
3054 */
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003055 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003056nodeleg:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057 status = nfs_ok;
3058
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003059 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003060 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003061out:
Benny Halevyd24433c2012-02-16 20:57:17 +02003062 /* 4.1 client trying to upgrade/downgrade delegation? */
3063 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
Benny Halevye27f49c2012-02-21 14:16:54 -08003064 open->op_deleg_want)
3065 nfsd4_deleg_xgrade_none_ext(open, dp);
Benny Halevyd24433c2012-02-16 20:57:17 +02003066
NeilBrown13cd2182005-06-23 22:03:10 -07003067 if (fp)
3068 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07003069 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003070 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071 /*
3072 * To finish the open response, we just need to set the rflags.
3073 */
3074 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003075 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03003076 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3078
3079 return status;
3080}
3081
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003082void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3083{
3084 if (open->op_openowner) {
3085 struct nfs4_openowner *oo = open->op_openowner;
3086
3087 if (!list_empty(&oo->oo_owner.so_stateids))
3088 list_del_init(&oo->oo_close_lru);
3089 if (oo->oo_flags & NFS4_OO_NEW) {
3090 if (status) {
3091 release_openowner(oo);
3092 open->op_openowner = NULL;
3093 } else
3094 oo->oo_flags &= ~NFS4_OO_NEW;
3095 }
3096 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04003097 if (open->op_file)
3098 nfsd4_free_file(open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003099 if (open->op_stp)
J. Bruce Fieldsef798592012-08-29 10:32:54 -07003100 free_generic_stateid(open->op_stp);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04003101}
3102
Al Virob37ad282006-10-19 23:28:59 -07003103__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003104nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3105 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106{
3107 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07003108 __be32 status;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003109 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110
3111 nfs4_lock_state();
3112 dprintk("process_renew(%08x/%08x): starting\n",
3113 clid->cl_boot, clid->cl_id);
3114 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003115 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116 goto out;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003117 clp = find_confirmed_client(clid, cstate->minorversion);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118 status = nfserr_expired;
3119 if (clp == NULL) {
3120 /* We assume the client took too long to RENEW. */
3121 dprintk("nfsd4_renew: clientid not found!\n");
3122 goto out;
3123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003124 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07003125 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04003126 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 goto out;
3128 status = nfs_ok;
3129out:
3130 nfs4_unlock_state();
3131 return status;
3132}
3133
NeilBrowna76b4312005-06-23 22:04:01 -07003134static void
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003135nfsd4_end_grace(struct net *net)
NeilBrowna76b4312005-06-23 22:04:01 -07003136{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003137 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3138
Jeff Layton33dcc482012-04-10 11:08:48 -04003139 /* do nothing if grace period already ended */
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003140 if (nn->grace_ended)
Jeff Layton33dcc482012-04-10 11:08:48 -04003141 return;
3142
NeilBrowna76b4312005-06-23 22:04:01 -07003143 dprintk("NFSD: end of grace period\n");
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04003144 nn->grace_ended = true;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003145 nfsd4_record_grace_done(net, nn->boot_time);
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003146 locks_end_grace(&nn->nfsd4_manager);
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05003147 /*
3148 * Now that every NFSv4 client has had the chance to recover and
3149 * to see the (possibly new, possibly shorter) lease time, we
3150 * can safely set the next grace time to the current lease time:
3151 */
3152 nfsd4_grace = nfsd4_lease;
NeilBrowna76b4312005-06-23 22:04:01 -07003153}
3154
NeilBrownfd39ca92005-06-23 22:04:03 -07003155static time_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156nfs4_laundromat(void)
3157{
3158 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003159 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 struct nfs4_delegation *dp;
3161 struct list_head *pos, *next, reaplist;
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05003162 time_t cutoff = get_seconds() - nfsd4_lease;
3163 time_t t, clientid_val = nfsd4_lease;
3164 time_t u, test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165
3166 nfs4_lock_state();
3167
3168 dprintk("NFSD: laundromat service - starting\n");
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04003169 nfsd4_end_grace(&init_net);
Benny Halevy36acb662010-05-12 00:13:04 +03003170 INIT_LIST_HEAD(&reaplist);
3171 spin_lock(&client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172 list_for_each_safe(pos, next, &client_lru) {
3173 clp = list_entry(pos, struct nfs4_client, cl_lru);
3174 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3175 t = clp->cl_time - cutoff;
3176 if (clientid_val > t)
3177 clientid_val = t;
3178 break;
3179 }
Benny Halevyd7682982010-05-12 00:13:54 +03003180 if (atomic_read(&clp->cl_refcount)) {
3181 dprintk("NFSD: client in use (clientid %08x)\n",
3182 clp->cl_clientid.cl_id);
3183 continue;
3184 }
3185 unhash_client_locked(clp);
3186 list_add(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03003187 }
3188 spin_unlock(&client_lock);
3189 list_for_each_safe(pos, next, &reaplist) {
3190 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191 dprintk("NFSD: purging unused client (clientid %08x)\n",
3192 clp->cl_clientid.cl_id);
Jeff Layton2a4317c2012-03-21 16:42:43 -04003193 nfsd4_client_record_remove(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194 expire_client(clp);
3195 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196 spin_lock(&recall_lock);
3197 list_for_each_safe(pos, next, &del_recall_lru) {
3198 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3199 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3200 u = dp->dl_time - cutoff;
3201 if (test_val > u)
3202 test_val = u;
3203 break;
3204 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003205 list_move(&dp->dl_recall_lru, &reaplist);
3206 }
3207 spin_unlock(&recall_lock);
3208 list_for_each_safe(pos, next, &reaplist) {
3209 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210 unhash_delegation(dp);
3211 }
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05003212 test_val = nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003213 list_for_each_safe(pos, next, &close_lru) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003214 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3215 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3216 u = oo->oo_time - cutoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217 if (test_val > u)
3218 test_val = u;
3219 break;
3220 }
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003221 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003222 }
3223 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
3224 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
3225 nfs4_unlock_state();
3226 return clientid_val;
3227}
3228
Harvey Harrisona254b242008-02-20 12:49:00 -08003229static struct workqueue_struct *laundry_wq;
3230static void laundromat_main(struct work_struct *);
3231static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
3232
3233static void
David Howellsc4028952006-11-22 14:57:56 +00003234laundromat_main(struct work_struct *not_used)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235{
3236 time_t t;
3237
3238 t = nfs4_laundromat();
3239 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
NeilBrown58da2822005-06-23 22:03:19 -07003240 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241}
3242
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003243static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07003244{
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003245 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3246 return nfserr_bad_stateid;
3247 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003248}
3249
3250static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003251STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252{
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003253 if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time)
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003254 return 0;
3255 dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003256 STATEID_VAL(stateid));
J. Bruce Fieldse4e83ea2010-04-22 16:21:39 -04003257 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258}
3259
3260static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003261access_permit_read(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003262{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003263 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3264 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3265 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266}
3267
3268static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04003269access_permit_write(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003270{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003271 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3272 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003273}
3274
3275static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003276__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003277{
Al Virob37ad282006-10-19 23:28:59 -07003278 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003279
J. Bruce Fields02921912010-07-29 15:16:59 -04003280 /* For lock stateid's, we test the parent open, not the lock: */
3281 if (stp->st_openstp)
3282 stp = stp->st_openstp;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003283 if ((flags & WR_STATE) && !access_permit_write(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003284 goto out;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003285 if ((flags & RD_STATE) && !access_permit_read(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286 goto out;
3287 status = nfs_ok;
3288out:
3289 return status;
3290}
3291
Al Virob37ad282006-10-19 23:28:59 -07003292static inline __be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003293check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003295 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296 return nfs_ok;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003297 else if (locks_in_grace(net)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003298 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07003299 * conflicting state; so we must wait out the grace period. */
3300 return nfserr_grace;
3301 } else if (flags & WR_STATE)
3302 return nfs4_share_conflict(current_fh,
3303 NFS4_SHARE_DENY_WRITE);
3304 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3305 return nfs4_share_conflict(current_fh,
3306 NFS4_SHARE_DENY_READ);
3307}
3308
3309/*
3310 * Allow READ/WRITE during grace period on recovered state only for files
3311 * that are not able to provide mandatory locking.
3312 */
3313static inline int
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003314grace_disallows_io(struct net *net, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315{
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003316 return locks_in_grace(net) && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317}
3318
J. Bruce Fields81b82962011-08-23 11:03:29 -04003319/* Returns true iff a is later than b: */
3320static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3321{
3322 return (s32)a->si_generation - (s32)b->si_generation > 0;
3323}
3324
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003325static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05003326{
Andy Adamson66689582009-04-03 08:28:45 +03003327 /*
3328 * When sessions are used the stateid generation number is ignored
3329 * when it is zero.
3330 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04003331 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04003332 return nfs_ok;
3333
3334 if (in->si_generation == ref->si_generation)
3335 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03003336
J. Bruce Fields0836f582008-01-26 19:08:12 -05003337 /* If the client sends us a stateid from the future, it's buggy: */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003338 if (stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05003339 return nfserr_bad_stateid;
3340 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04003341 * However, we could see a stateid from the past, even from a
3342 * non-buggy client. For example, if the client sends a lock
3343 * while some IO is outstanding, the lock may bump si_generation
3344 * while the IO is still in flight. The client could avoid that
3345 * situation by waiting for responses on all the IO requests,
3346 * but better performance may result in retrying IO that
3347 * receives an old_stateid error if requests are rarely
3348 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05003349 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04003350 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05003351}
3352
Chuck Lever7df302f2012-05-29 13:56:37 -04003353static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04003354{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003355 struct nfs4_stid *s;
3356 struct nfs4_ol_stateid *ols;
3357 __be32 status;
Bryan Schumaker17456802011-07-13 10:50:48 -04003358
Chuck Lever7df302f2012-05-29 13:56:37 -04003359 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3360 return nfserr_bad_stateid;
3361 /* Client debugging aid. */
3362 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
3363 char addr_str[INET6_ADDRSTRLEN];
3364 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
3365 sizeof(addr_str));
3366 pr_warn_ratelimited("NFSD: client %s testing state ID "
3367 "with incorrect client ID\n", addr_str);
3368 return nfserr_bad_stateid;
3369 }
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003370 s = find_stateid(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003371 if (!s)
Chuck Lever7df302f2012-05-29 13:56:37 -04003372 return nfserr_bad_stateid;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04003373 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04003374 if (status)
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003375 return status;
3376 if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID)))
3377 return nfs_ok;
3378 ols = openlockstateid(s);
3379 if (ols->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003380 && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04003381 return nfserr_bad_stateid;
3382 return nfs_ok;
Bryan Schumaker17456802011-07-13 10:50:48 -04003383}
3384
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003385static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions)
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003386{
3387 struct nfs4_client *cl;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003388 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003389
3390 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3391 return nfserr_bad_stateid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003392 if (STALE_STATEID(stateid, nn))
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003393 return nfserr_stale_stateid;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003394 cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003395 if (!cl)
3396 return nfserr_expired;
3397 *s = find_stateid_by_type(cl, stateid, typemask);
3398 if (!*s)
3399 return nfserr_bad_stateid;
3400 return nfs_ok;
3401
3402}
3403
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404/*
3405* Checks for stateid operations
3406*/
Al Virob37ad282006-10-19 23:28:59 -07003407__be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003408nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
Benny Halevydd453df2009-04-03 08:28:41 +03003409 stateid_t *stateid, int flags, struct file **filpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410{
J. Bruce Fields69064a22011-09-09 11:54:57 -04003411 struct nfs4_stid *s;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003412 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003413 struct nfs4_delegation *dp = NULL;
Benny Halevydd453df2009-04-03 08:28:41 +03003414 struct svc_fh *current_fh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003415 struct inode *ino = current_fh->fh_dentry->d_inode;
Al Virob37ad282006-10-19 23:28:59 -07003416 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417
Linus Torvalds1da177e2005-04-16 15:20:36 -07003418 if (filpp)
3419 *filpp = NULL;
3420
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003421 if (grace_disallows_io(net, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003422 return nfserr_grace;
3423
3424 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04003425 return check_special_stateids(net, current_fh, stateid, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003426
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003427 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003428 if (status)
3429 return status;
J. Bruce Fields69064a22011-09-09 11:54:57 -04003430 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
3431 if (status)
3432 goto out;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003433 switch (s->sc_type) {
3434 case NFS4_DELEG_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003435 dp = delegstateid(s);
J. Bruce Fieldsdc9bf702009-02-21 11:14:43 -08003436 status = nfs4_check_delegmode(dp, flags);
3437 if (status)
3438 goto out;
Dan Carpenter43b01782010-10-27 23:19:04 +02003439 if (filpp) {
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003440 *filpp = dp->dl_file->fi_deleg_file;
Dan Carpenter43b01782010-10-27 23:19:04 +02003441 BUG_ON(!*filpp);
3442 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003443 break;
3444 case NFS4_OPEN_STID:
3445 case NFS4_LOCK_STID:
J. Bruce Fields69064a22011-09-09 11:54:57 -04003446 stp = openlockstateid(s);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003447 status = nfs4_check_fh(current_fh, stp);
3448 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003450 if (stp->st_stateowner->so_is_open_owner
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003451 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452 goto out;
J. Bruce Fieldsa4455be2009-02-21 10:40:22 -08003453 status = nfs4_check_openmode(stp, flags);
3454 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003455 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003456 if (filpp) {
3457 if (flags & RD_STATE)
3458 *filpp = find_readable_file(stp->st_file);
3459 else
3460 *filpp = find_writeable_file(stp->st_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04003461 }
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003462 break;
3463 default:
3464 return nfserr_bad_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003465 }
3466 status = nfs_ok;
3467out:
3468 return status;
3469}
3470
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003471static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003472nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003473{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003474 if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner)))
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003475 return nfserr_locks_held;
3476 release_lock_stateid(stp);
3477 return nfs_ok;
3478}
3479
3480/*
Bryan Schumaker17456802011-07-13 10:50:48 -04003481 * Test if the stateid is valid
3482 */
3483__be32
3484nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3485 struct nfsd4_test_stateid *test_stateid)
3486{
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003487 struct nfsd4_test_stateid_id *stateid;
3488 struct nfs4_client *cl = cstate->session->se_client;
3489
3490 nfs4_lock_state();
3491 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
Chuck Lever7df302f2012-05-29 13:56:37 -04003492 stateid->ts_id_status =
3493 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003494 nfs4_unlock_state();
3495
Bryan Schumaker17456802011-07-13 10:50:48 -04003496 return nfs_ok;
3497}
3498
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003499__be32
3500nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3501 struct nfsd4_free_stateid *free_stateid)
3502{
3503 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003504 struct nfs4_stid *s;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003505 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003506 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003507
3508 nfs4_lock_state();
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003509 s = find_stateid(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003510 if (!s)
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003511 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003512 switch (s->sc_type) {
3513 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003514 ret = nfserr_locks_held;
3515 goto out;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04003516 case NFS4_OPEN_STID:
3517 case NFS4_LOCK_STID:
3518 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
3519 if (ret)
3520 goto out;
3521 if (s->sc_type == NFS4_LOCK_STID)
3522 ret = nfsd4_free_lock_stateid(openlockstateid(s));
3523 else
3524 ret = nfserr_locks_held;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003525 break;
3526 default:
3527 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003528 }
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003529out:
3530 nfs4_unlock_state();
3531 return ret;
3532}
3533
NeilBrown4c4cd222005-07-07 17:59:27 -07003534static inline int
3535setlkflg (int type)
3536{
3537 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
3538 RD_STATE : WR_STATE;
3539}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003540
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003541static __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 -04003542{
3543 struct svc_fh *current_fh = &cstate->current_fh;
3544 struct nfs4_stateowner *sop = stp->st_stateowner;
3545 __be32 status;
3546
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003547 status = nfsd4_check_seqid(cstate, sop, seqid);
3548 if (status)
3549 return status;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003550 if (stp->st_stid.sc_type == NFS4_CLOSED_STID)
3551 /*
3552 * "Closed" stateid's exist *only* to return
3553 * nfserr_replay_me from the previous step.
3554 */
3555 return nfserr_bad_stateid;
3556 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
3557 if (status)
3558 return status;
3559 return nfs4_check_fh(current_fh, stp);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003560}
3561
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562/*
3563 * Checks for sequence id mutating operations.
3564 */
Al Virob37ad282006-10-19 23:28:59 -07003565static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03003566nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003567 stateid_t *stateid, char typemask,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003568 struct nfs4_ol_stateid **stpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003569{
J. Bruce Fields0836f582008-01-26 19:08:12 -05003570 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003571 struct nfs4_stid *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003572
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003573 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
3574 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07003575
Linus Torvalds1da177e2005-04-16 15:20:36 -07003576 *stpp = NULL;
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003577 status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003578 if (status)
3579 return status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003580 *stpp = openlockstateid(s);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003581 cstate->replay_owner = (*stpp)->st_stateowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003583 return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
3584}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05003585
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003586static __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 -04003587{
3588 __be32 status;
3589 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003591 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003592 NFS4_OPEN_STID, stpp);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003593 if (status)
3594 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003595 oo = openowner((*stpp)->st_stateowner);
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003596 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
NeilBrown3a4f98b2005-07-07 17:59:26 -07003597 return nfserr_bad_stateid;
NeilBrown3a4f98b2005-07-07 17:59:26 -07003598 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003599}
3600
Al Virob37ad282006-10-19 23:28:59 -07003601__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003602nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003603 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003604{
Al Virob37ad282006-10-19 23:28:59 -07003605 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003606 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003607 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608
3609 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003610 (int)cstate->current_fh.fh_dentry->d_name.len,
3611 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003612
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003613 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07003614 if (status)
3615 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003616
3617 nfs4_lock_state();
3618
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003619 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003620 oc->oc_seqid, &oc->oc_req_stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04003621 NFS4_OPEN_STID, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003622 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003623 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003624 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003625 status = nfserr_bad_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003626 if (oo->oo_flags & NFS4_OO_CONFIRMED)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003627 goto out;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003628 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003629 update_stateid(&stp->st_stid.sc_stateid);
3630 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02003631 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003632 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07003633
Jeff Layton2a4317c2012-03-21 16:42:43 -04003634 nfsd4_client_record_create(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04003635 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003637 if (!cstate->replay_owner)
3638 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 return status;
3640}
3641
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003642static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003643{
Jeff Layton82c5ff12012-05-11 09:45:13 -04003644 if (!test_access(access, stp))
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003645 return;
3646 nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
Jeff Layton82c5ff12012-05-11 09:45:13 -04003647 clear_access(access, stp);
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003648}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04003649
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003650static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
3651{
3652 switch (to_access) {
3653 case NFS4_SHARE_ACCESS_READ:
3654 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
3655 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3656 break;
3657 case NFS4_SHARE_ACCESS_WRITE:
3658 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
3659 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
3660 break;
3661 case NFS4_SHARE_ACCESS_BOTH:
3662 break;
3663 default:
3664 BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003665 }
3666}
3667
3668static void
Jeff Laytonce0fc432012-05-11 09:45:14 -04003669reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670{
3671 int i;
3672 for (i = 0; i < 4; i++) {
3673 if ((i & deny) != i)
Jeff Laytonce0fc432012-05-11 09:45:14 -04003674 clear_deny(i, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003675 }
3676}
3677
Al Virob37ad282006-10-19 23:28:59 -07003678__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003679nfsd4_open_downgrade(struct svc_rqst *rqstp,
3680 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003681 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003682{
Al Virob37ad282006-10-19 23:28:59 -07003683 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003684 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003685
3686 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003687 (int)cstate->current_fh.fh_dentry->d_name.len,
3688 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04003690 /* We don't yet support WANT bits: */
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02003691 if (od->od_deleg_want)
3692 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
3693 od->od_deleg_want);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003694
3695 nfs4_lock_state();
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04003696 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
3697 &od->od_stateid, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003698 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700 status = nfserr_inval;
Jeff Layton82c5ff12012-05-11 09:45:13 -04003701 if (!test_access(od->od_share_access, stp)) {
3702 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703 stp->st_access_bmap, od->od_share_access);
3704 goto out;
3705 }
Jeff Laytonce0fc432012-05-11 09:45:14 -04003706 if (!test_deny(od->od_share_deny, stp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003707 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3708 stp->st_deny_bmap, od->od_share_deny);
3709 goto out;
3710 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04003711 nfs4_stateid_downgrade(stp, od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003712
Jeff Laytonce0fc432012-05-11 09:45:14 -04003713 reset_union_bmap_deny(od->od_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003715 update_stateid(&stp->st_stid.sc_stateid);
3716 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717 status = nfs_ok;
3718out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003719 if (!cstate->replay_owner)
3720 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 return status;
3722}
3723
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003724void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so)
3725{
3726 struct nfs4_openowner *oo;
3727 struct nfs4_ol_stateid *s;
3728
3729 if (!so->so_is_open_owner)
3730 return;
3731 oo = openowner(so);
3732 s = oo->oo_last_closed_stid;
3733 if (!s)
3734 return;
3735 if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) {
3736 /* Release the last_closed_stid on the next seqid bump: */
3737 oo->oo_flags |= NFS4_OO_PURGE_CLOSE;
3738 return;
3739 }
3740 oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003741 release_last_closed_stateid(oo);
3742}
3743
3744static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
3745{
3746 unhash_open_stateid(s);
3747 s->st_stid.sc_type = NFS4_CLOSED_STID;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003748}
3749
Linus Torvalds1da177e2005-04-16 15:20:36 -07003750/*
3751 * nfs4_unlock_state() called after encode
3752 */
Al Virob37ad282006-10-19 23:28:59 -07003753__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003754nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08003755 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003756{
Al Virob37ad282006-10-19 23:28:59 -07003757 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003758 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003759 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003760
3761 dprintk("NFSD: nfsd4_close on file %.*s\n",
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003762 (int)cstate->current_fh.fh_dentry->d_name.len,
3763 cstate->current_fh.fh_dentry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003764
3765 nfs4_lock_state();
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003766 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
3767 &close->cl_stateid,
3768 NFS4_OPEN_STID|NFS4_CLOSED_STID,
3769 &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04003770 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003771 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003772 oo = openowner(stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003773 status = nfs_ok;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003774 update_stateid(&stp->st_stid.sc_stateid);
3775 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04003777 nfsd4_close_open_stateid(stp);
J. Bruce Fieldscf9182e2012-08-29 15:21:58 -07003778 release_last_closed_stateid(oo);
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003779 oo->oo_last_closed_stid = stp;
J. Bruce Fields04ef5952006-01-18 17:43:21 -08003780
J. Bruce Fields74dbafa2012-06-06 12:53:48 -04003781 if (list_empty(&oo->oo_owner.so_stateids)) {
3782 if (cstate->minorversion) {
3783 release_openowner(oo);
3784 cstate->replay_owner = NULL;
3785 } else {
3786 /*
3787 * In the 4.0 case we need to keep the owners around a
3788 * little while to handle CLOSE replay.
3789 */
3790 if (list_empty(&oo->oo_owner.so_stateids))
3791 move_to_close_lru(oo);
3792 }
3793 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003794out:
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04003795 if (!cstate->replay_owner)
3796 nfs4_unlock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003797 return status;
3798}
3799
Al Virob37ad282006-10-19 23:28:59 -07003800__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003801nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3802 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003803{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003804 struct nfs4_delegation *dp;
3805 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003806 struct nfs4_stid *s;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003807 struct inode *inode;
Al Virob37ad282006-10-19 23:28:59 -07003808 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809
J.Bruce Fieldsca364312006-12-13 00:35:27 -08003810 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003811 return status;
3812 inode = cstate->current_fh.fh_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003813
3814 nfs4_lock_state();
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04003815 status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003816 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003817 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003818 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04003819 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003820 if (status)
3821 goto out;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003822
3823 unhash_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824out:
J. Bruce Fields203a8c82009-02-21 13:29:14 -08003825 nfs4_unlock_state();
3826
Linus Torvalds1da177e2005-04-16 15:20:36 -07003827 return status;
3828}
3829
3830
Linus Torvalds1da177e2005-04-16 15:20:36 -07003831#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003832
J. Bruce Fields009673b2011-11-07 17:40:10 -05003833#define LOCKOWNER_INO_HASH_BITS 8
3834#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
3835#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003836
Benny Halevy87df4de2008-12-15 19:42:03 +02003837static inline u64
3838end_offset(u64 start, u64 len)
3839{
3840 u64 end;
3841
3842 end = start + len;
3843 return end >= start ? end: NFS4_MAX_UINT64;
3844}
3845
3846/* last octet in a range */
3847static inline u64
3848last_byte_offset(u64 start, u64 len)
3849{
3850 u64 end;
3851
3852 BUG_ON(!len);
3853 end = start + len;
3854 return end > start ? end - 1: NFS4_MAX_UINT64;
3855}
3856
J. Bruce Fields009673b2011-11-07 17:40:10 -05003857static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858{
3859 return (file_hashval(inode) + cl_id
3860 + opaque_hashval(ownername->data, ownername->len))
J. Bruce Fields009673b2011-11-07 17:40:10 -05003861 & LOCKOWNER_INO_HASH_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003862}
3863
J. Bruce Fields009673b2011-11-07 17:40:10 -05003864static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865
Linus Torvalds1da177e2005-04-16 15:20:36 -07003866/*
3867 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3868 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3869 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3870 * locking, this prevents us from being completely protocol-compliant. The
3871 * real solution to this problem is to start using unsigned file offsets in
3872 * the VFS, but this is a very deep change!
3873 */
3874static inline void
3875nfs4_transform_lock_offset(struct file_lock *lock)
3876{
3877 if (lock->fl_start < 0)
3878 lock->fl_start = OFFSET_MAX;
3879 if (lock->fl_end < 0)
3880 lock->fl_end = OFFSET_MAX;
3881}
3882
NeilBrownd5b90262006-04-10 22:55:22 -07003883/* Hack!: For now, we're defining this just so we can use a pointer to it
3884 * as a unique cookie to identify our (NFSv4's) posix locks. */
Alexey Dobriyan7b021962009-09-21 17:01:12 -07003885static const struct lock_manager_operations nfsd_posix_mng_ops = {
NeilBrownd5b90262006-04-10 22:55:22 -07003886};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887
3888static inline void
3889nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
3890{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003891 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003892
NeilBrownd5b90262006-04-10 22:55:22 -07003893 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003894 lo = (struct nfs4_lockowner *) fl->fl_owner;
3895 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
3896 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003897 if (!deny->ld_owner.data)
3898 /* We just don't care that much */
3899 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003900 deny->ld_owner.len = lo->lo_owner.so_owner.len;
3901 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07003902 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003903nevermind:
3904 deny->ld_owner.len = 0;
3905 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07003906 deny->ld_clientid.cl_boot = 0;
3907 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 }
3909 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02003910 deny->ld_length = NFS4_MAX_UINT64;
3911 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003912 deny->ld_length = fl->fl_end - fl->fl_start + 1;
3913 deny->ld_type = NFS4_READ_LT;
3914 if (fl->fl_type != F_RDLCK)
3915 deny->ld_type = NFS4_WRITE_LT;
3916}
3917
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05003918static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner)
3919{
3920 struct nfs4_ol_stateid *lst;
3921
3922 if (!same_owner_str(&lo->lo_owner, owner, clid))
3923 return false;
3924 lst = list_first_entry(&lo->lo_owner.so_stateids,
3925 struct nfs4_ol_stateid, st_perstateowner);
3926 return lst->st_file->fi_inode == inode;
3927}
3928
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003929static struct nfs4_lockowner *
3930find_lockowner_str(struct inode *inode, clientid_t *clid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003931 struct xdr_netobj *owner)
3932{
J. Bruce Fields009673b2011-11-07 17:40:10 -05003933 unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner);
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05003934 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003935
J. Bruce Fields009673b2011-11-07 17:40:10 -05003936 list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
J. Bruce Fieldsb93d87c2011-11-07 16:37:57 -05003937 if (same_lockowner_ino(lo, inode, clid, owner))
3938 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003939 }
3940 return NULL;
3941}
3942
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003943static 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 -04003944{
J. Bruce Fields009673b2011-11-07 17:40:10 -05003945 struct inode *inode = open_stp->st_file->fi_inode;
3946 unsigned int inohash = lockowner_ino_hashval(inode,
3947 clp->cl_clientid.cl_id, &lo->lo_owner.so_owner);
3948
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05003949 list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);
J. Bruce Fields009673b2011-11-07 17:40:10 -05003950 list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003951 list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003952}
3953
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954/*
3955 * Alloc a lock owner structure.
3956 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003957 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003958 *
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05003959 * strhashval = ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07003960 */
3961
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003962static struct nfs4_lockowner *
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003963alloc_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 -04003964 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003966 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
3967 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003968 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003969 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
3970 lo->lo_owner.so_is_open_owner = 0;
Neil Brownb59e3c02005-09-13 01:25:38 -07003971 /* It is the openowner seqid that will be incremented in encode in the
3972 * case of new lockowners; so increment the lock seqid manually: */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003973 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
3974 hash_lockowner(lo, strhashval, clp, open_stp);
3975 return lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003976}
3977
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003978static struct nfs4_ol_stateid *
3979alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003981 struct nfs4_ol_stateid *stp;
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04003982 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003983
J. Bruce Fields996e0932011-10-17 11:14:48 -04003984 stp = nfs4_alloc_stateid(clp);
NeilBrown5ac049a2005-06-23 22:03:03 -07003985 if (stp == NULL)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -04003986 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04003987 init_stid(&stp->st_stid, clp, NFS4_LOCK_STID);
NeilBrown8beefa22005-06-23 22:03:08 -07003988 list_add(&stp->st_perfile, &fp->fi_stateids);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003989 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
3990 stp->st_stateowner = &lo->lo_owner;
NeilBrown13cd2182005-06-23 22:03:10 -07003991 get_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003992 stp->st_file = fp;
J. Bruce Fields0997b172011-03-02 18:01:35 -05003993 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003994 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07003995 stp->st_openstp = open_stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003996 return stp;
3997}
3998
NeilBrownfd39ca92005-06-23 22:04:03 -07003999static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07004000check_lock_length(u64 offset, u64 length)
4001{
Benny Halevy87df4de2008-12-15 19:42:03 +02004002 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07004003 LOFF_OVERFLOW(offset, length)));
4004}
4005
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004006static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05004007{
4008 struct nfs4_file *fp = lock_stp->st_file;
4009 int oflag = nfs4_access_to_omode(access);
4010
Jeff Layton82c5ff12012-05-11 09:45:13 -04004011 if (test_access(access, lock_stp))
J. Bruce Fields0997b172011-03-02 18:01:35 -05004012 return;
4013 nfs4_file_get_access(fp, oflag);
Jeff Layton82c5ff12012-05-11 09:45:13 -04004014 set_access(access, lock_stp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05004015}
4016
J. Bruce Fields2355c592012-04-25 16:56:22 -04004017static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new)
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004018{
4019 struct nfs4_file *fi = ost->st_file;
4020 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4021 struct nfs4_client *cl = oo->oo_owner.so_client;
4022 struct nfs4_lockowner *lo;
4023 unsigned int strhashval;
4024
4025 lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner);
4026 if (lo) {
4027 if (!cstate->minorversion)
4028 return nfserr_bad_seqid;
4029 /* XXX: a lockowner always has exactly one stateid: */
4030 *lst = list_first_entry(&lo->lo_owner.so_stateids,
4031 struct nfs4_ol_stateid, st_perstateowner);
4032 return nfs_ok;
4033 }
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004034 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004035 &lock->v.new.owner);
4036 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4037 if (lo == NULL)
4038 return nfserr_jukebox;
4039 *lst = alloc_init_lock_stateid(lo, fi, ost);
4040 if (*lst == NULL) {
4041 release_lockowner(lo);
4042 return nfserr_jukebox;
4043 }
4044 *new = true;
4045 return nfs_ok;
4046}
4047
Linus Torvalds1da177e2005-04-16 15:20:36 -07004048/*
4049 * LOCK operation
4050 */
Al Virob37ad282006-10-19 23:28:59 -07004051__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004052nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004053 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004054{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004055 struct nfs4_openowner *open_sop = NULL;
4056 struct nfs4_lockowner *lock_sop = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004057 struct nfs4_ol_stateid *lock_stp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04004058 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004059 struct file_lock *file_lock = NULL;
4060 struct file_lock *conflock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004061 __be32 status = 0;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004062 bool new_state = false;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004063 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07004064 int err;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004065 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004066
4067 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4068 (long long) lock->lk_offset,
4069 (long long) lock->lk_length);
4070
Linus Torvalds1da177e2005-04-16 15:20:36 -07004071 if (check_lock_length(lock->lk_offset, lock->lk_length))
4072 return nfserr_inval;
4073
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004074 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02004075 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08004076 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4077 return status;
4078 }
4079
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080 nfs4_lock_state();
4081
4082 if (lock->lk_is_new) {
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004083 struct nfs4_ol_stateid *open_stp = NULL;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004084
4085 if (nfsd4_has_session(cstate))
4086 /* See rfc 5661 18.10.3: given clientid is ignored: */
4087 memcpy(&lock->v.new.clientid,
4088 &cstate->session->se_client->cl_clientid,
4089 sizeof(clientid_t));
4090
Linus Torvalds1da177e2005-04-16 15:20:36 -07004091 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004092 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004093 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004094
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004096 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004097 lock->lk_new_open_seqid,
4098 &lock->lk_new_open_stateid,
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004099 &open_stp);
NeilBrown37515172005-07-07 17:59:16 -07004100 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004101 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004102 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004103 status = nfserr_bad_stateid;
J. Bruce Fields684e5632011-11-04 17:08:10 -04004104 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004105 &lock->v.new.clientid))
4106 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004107 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4108 &lock_stp, &new_state);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004109 } else
Benny Halevydd453df2009-04-03 08:28:41 +03004110 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004111 lock->lk_old_lock_seqid,
4112 &lock->lk_old_lock_stateid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04004113 NFS4_LOCK_STID, &lock_stp);
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04004114 if (status)
4115 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004116 lock_sop = lockowner(lock_stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004117
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04004118 lkflg = setlkflg(lock->lk_type);
4119 status = nfs4_check_openmode(lock_stp, lkflg);
4120 if (status)
4121 goto out;
4122
NeilBrown0dd395dc2005-07-07 17:59:15 -07004123 status = nfserr_grace;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004124 if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim)
NeilBrown0dd395dc2005-07-07 17:59:15 -07004125 goto out;
4126 status = nfserr_no_grace;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004127 if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim)
NeilBrown0dd395dc2005-07-07 17:59:15 -07004128 goto out;
4129
Jeff Layton21179d82012-08-21 08:03:32 -04004130 file_lock = locks_alloc_lock();
4131 if (!file_lock) {
4132 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4133 status = nfserr_jukebox;
4134 goto out;
4135 }
4136
4137 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004138 switch (lock->lk_type) {
4139 case NFS4_READ_LT:
4140 case NFS4_READW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004141 filp = find_readable_file(lock_stp->st_file);
4142 if (filp)
4143 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Jeff Layton21179d82012-08-21 08:03:32 -04004144 file_lock->fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004145 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146 case NFS4_WRITE_LT:
4147 case NFS4_WRITEW_LT:
J. Bruce Fields0997b172011-03-02 18:01:35 -05004148 filp = find_writeable_file(lock_stp->st_file);
4149 if (filp)
4150 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Jeff Layton21179d82012-08-21 08:03:32 -04004151 file_lock->fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05004152 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004153 default:
4154 status = nfserr_inval;
4155 goto out;
4156 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004157 if (!filp) {
4158 status = nfserr_openmode;
4159 goto out;
4160 }
Jeff Layton21179d82012-08-21 08:03:32 -04004161 file_lock->fl_owner = (fl_owner_t)lock_sop;
4162 file_lock->fl_pid = current->tgid;
4163 file_lock->fl_file = filp;
4164 file_lock->fl_flags = FL_POSIX;
4165 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4166 file_lock->fl_start = lock->lk_offset;
4167 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4168 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004169
Jeff Layton21179d82012-08-21 08:03:32 -04004170 conflock = locks_alloc_lock();
4171 if (!conflock) {
4172 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4173 status = nfserr_jukebox;
4174 goto out;
4175 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176
Jeff Layton21179d82012-08-21 08:03:32 -04004177 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07004178 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004179 case 0: /* success! */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004180 update_stateid(&lock_stp->st_stid.sc_stateid);
4181 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004182 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07004183 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004184 break;
4185 case (EAGAIN): /* conflock holds conflicting lock */
4186 status = nfserr_denied;
4187 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
Jeff Layton21179d82012-08-21 08:03:32 -04004188 nfs4_set_lock_denied(conflock, &lock->lk_denied);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004189 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190 case (EDEADLK):
4191 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004192 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04004193 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05004194 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04004195 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08004196 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004198out:
J. Bruce Fields64a284d2011-10-20 06:57:46 -04004199 if (status && new_state)
J. Bruce Fieldsf044ff82009-01-11 15:24:04 -05004200 release_lockowner(lock_sop);
J. Bruce Fields5ec094c2011-08-30 17:02:48 -04004201 if (!cstate->replay_owner)
4202 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004203 if (file_lock)
4204 locks_free_lock(file_lock);
4205 if (conflock)
4206 locks_free_lock(conflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004207 return status;
4208}
4209
4210/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004211 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4212 * so we do a temporary open here just to get an open file to pass to
4213 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4214 * inode operation.)
4215 */
Al Viro04da6e92012-04-13 00:00:04 -04004216static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004217{
4218 struct file *file;
Al Viro04da6e92012-04-13 00:00:04 -04004219 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4220 if (!err) {
4221 err = nfserrno(vfs_test_lock(file, lock));
4222 nfsd_close(file);
4223 }
J. Bruce Fields55ef1272008-12-20 11:58:38 -08004224 return err;
4225}
4226
4227/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07004228 * LOCKT operation
4229 */
Al Virob37ad282006-10-19 23:28:59 -07004230__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004231nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4232 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004233{
4234 struct inode *inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004235 struct file_lock *file_lock = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004236 struct nfs4_lockowner *lo;
Al Virob37ad282006-10-19 23:28:59 -07004237 __be32 status;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004238 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004239
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004240 if (locks_in_grace(SVC_NET(rqstp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004241 return nfserr_grace;
4242
4243 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4244 return nfserr_inval;
4245
Linus Torvalds1da177e2005-04-16 15:20:36 -07004246 nfs4_lock_state();
4247
4248 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004249 if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004250 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004251
J. Bruce Fields75c096f2011-08-15 18:39:32 -04004252 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004253 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004254
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004255 inode = cstate->current_fh.fh_dentry->d_inode;
Jeff Layton21179d82012-08-21 08:03:32 -04004256 file_lock = locks_alloc_lock();
4257 if (!file_lock) {
4258 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4259 status = nfserr_jukebox;
4260 goto out;
4261 }
4262 locks_init_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004263 switch (lockt->lt_type) {
4264 case NFS4_READ_LT:
4265 case NFS4_READW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004266 file_lock->fl_type = F_RDLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004267 break;
4268 case NFS4_WRITE_LT:
4269 case NFS4_WRITEW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04004270 file_lock->fl_type = F_WRLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004271 break;
4272 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04004273 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004274 status = nfserr_inval;
4275 goto out;
4276 }
4277
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004278 lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner);
4279 if (lo)
Jeff Layton21179d82012-08-21 08:03:32 -04004280 file_lock->fl_owner = (fl_owner_t)lo;
4281 file_lock->fl_pid = current->tgid;
4282 file_lock->fl_flags = FL_POSIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004283
Jeff Layton21179d82012-08-21 08:03:32 -04004284 file_lock->fl_start = lockt->lt_offset;
4285 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004286
Jeff Layton21179d82012-08-21 08:03:32 -04004287 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004288
Jeff Layton21179d82012-08-21 08:03:32 -04004289 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
Al Viro04da6e92012-04-13 00:00:04 -04004290 if (status)
Marc Eshelfd85b812006-11-28 16:26:41 -05004291 goto out;
Al Viro04da6e92012-04-13 00:00:04 -04004292
Jeff Layton21179d82012-08-21 08:03:32 -04004293 if (file_lock->fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004294 status = nfserr_denied;
Jeff Layton21179d82012-08-21 08:03:32 -04004295 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004296 }
4297out:
4298 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004299 if (file_lock)
4300 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004301 return status;
4302}
4303
Al Virob37ad282006-10-19 23:28:59 -07004304__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004305nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004306 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004307{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004308 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004309 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04004310 struct file_lock *file_lock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004311 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07004312 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313
4314 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4315 (long long) locku->lu_offset,
4316 (long long) locku->lu_length);
4317
4318 if (check_lock_length(locku->lu_offset, locku->lu_length))
4319 return nfserr_inval;
4320
4321 nfs4_lock_state();
4322
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004323 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04004324 &locku->lu_stateid, NFS4_LOCK_STID, &stp);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004325 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004326 goto out;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004327 filp = find_any_file(stp->st_file);
4328 if (!filp) {
4329 status = nfserr_lock_range;
4330 goto out;
4331 }
Jeff Layton21179d82012-08-21 08:03:32 -04004332 file_lock = locks_alloc_lock();
4333 if (!file_lock) {
4334 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4335 status = nfserr_jukebox;
4336 goto out;
4337 }
4338 locks_init_lock(file_lock);
4339 file_lock->fl_type = F_UNLCK;
4340 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
4341 file_lock->fl_pid = current->tgid;
4342 file_lock->fl_file = filp;
4343 file_lock->fl_flags = FL_POSIX;
4344 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4345 file_lock->fl_start = locku->lu_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004346
Jeff Layton21179d82012-08-21 08:03:32 -04004347 file_lock->fl_end = last_byte_offset(locku->lu_offset,
4348 locku->lu_length);
4349 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004350
4351 /*
4352 * Try to unlock the file in the VFS.
4353 */
Jeff Layton21179d82012-08-21 08:03:32 -04004354 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07004355 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05004356 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004357 goto out_nfserr;
4358 }
4359 /*
4360 * OK, unlock succeeded; the only thing left to do is update the stateid.
4361 */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004362 update_stateid(&stp->st_stid.sc_stateid);
4363 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364
4365out:
J. Bruce Fields71c3bcd2011-09-27 21:42:29 -04004366 if (!cstate->replay_owner)
4367 nfs4_unlock_state();
Jeff Layton21179d82012-08-21 08:03:32 -04004368 if (file_lock)
4369 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004370 return status;
4371
4372out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07004373 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004374 goto out;
4375}
4376
4377/*
4378 * returns
4379 * 1: locks held by lockowner
4380 * 0: no locks held by lockowner
4381 */
4382static int
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004383check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004384{
4385 struct file_lock **flpp;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004386 struct inode *inode = filp->fi_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387 int status = 0;
4388
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004389 lock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004390 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004391 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392 status = 1;
4393 goto out;
J. Bruce Fields796dadf2006-01-18 17:43:22 -08004394 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004395 }
4396out:
Arnd Bergmannb89f4322010-09-18 15:09:31 +02004397 unlock_flocks();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004398 return status;
4399}
4400
Al Virob37ad282006-10-19 23:28:59 -07004401__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004402nfsd4_release_lockowner(struct svc_rqst *rqstp,
4403 struct nfsd4_compound_state *cstate,
4404 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004405{
4406 clientid_t *clid = &rlockowner->rl_clientid;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004407 struct nfs4_stateowner *sop;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004408 struct nfs4_lockowner *lo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004409 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004410 struct xdr_netobj *owner = &rlockowner->rl_owner;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004411 struct list_head matches;
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004412 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
Al Virob37ad282006-10-19 23:28:59 -07004413 __be32 status;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004414 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004415
4416 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4417 clid->cl_boot, clid->cl_id);
4418
4419 /* XXX check for lease expiration */
4420
4421 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004422 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004424
4425 nfs4_lock_state();
4426
NeilBrown3e9e3db2005-06-23 22:04:20 -07004427 status = nfserr_locks_held;
NeilBrown3e9e3db2005-06-23 22:04:20 -07004428 INIT_LIST_HEAD(&matches);
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004429
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004430 list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) {
4431 if (sop->so_is_open_owner)
4432 continue;
J. Bruce Fields06f1f862011-11-07 16:58:18 -05004433 if (!same_owner_str(sop, owner, clid))
4434 continue;
4435 list_for_each_entry(stp, &sop->so_stateids,
4436 st_perstateowner) {
4437 lo = lockowner(sop);
4438 if (check_for_locks(stp->st_file, lo))
4439 goto out;
4440 list_add(&lo->lo_list, &matches);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004441 }
NeilBrown3e9e3db2005-06-23 22:04:20 -07004442 }
4443 /* Clients probably won't expect us to return with some (but not all)
4444 * of the lockowner state released; so don't release any until all
4445 * have been checked. */
4446 status = nfs_ok;
NeilBrown0fa822e2005-07-07 17:59:14 -07004447 while (!list_empty(&matches)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004448 lo = list_entry(matches.next, struct nfs4_lockowner,
4449 lo_list);
NeilBrown0fa822e2005-07-07 17:59:14 -07004450 /* unhash_stateowner deletes so_perclient only
4451 * for openowners. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004452 list_del(&lo->lo_list);
4453 release_lockowner(lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004454 }
4455out:
4456 nfs4_unlock_state();
4457 return status;
4458}
4459
4460static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07004461alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004462{
NeilBrowna55370a2005-06-23 22:03:52 -07004463 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004464}
4465
NeilBrownc7b9a452005-06-23 22:04:30 -07004466int
Andy Adamsona1bcecd2009-04-03 08:28:05 +03004467nfs4_has_reclaimed_state(const char *name, bool use_exchange_id)
NeilBrownc7b9a452005-06-23 22:04:30 -07004468{
4469 unsigned int strhashval = clientstr_hashval(name);
4470 struct nfs4_client *clp;
4471
J. Bruce Fieldse203d502010-11-24 17:30:54 -05004472 clp = find_confirmed_client_by_str(name, strhashval);
J. Bruce Fields393d8ed2012-03-06 14:43:36 -05004473 if (!clp)
4474 return 0;
Jeff Laytona52d7262012-03-21 09:52:02 -04004475 return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
NeilBrownc7b9a452005-06-23 22:04:30 -07004476}
4477
Linus Torvalds1da177e2005-04-16 15:20:36 -07004478/*
4479 * failure => all reset bets are off, nfserr_no_grace...
4480 */
NeilBrown190e4fb2005-06-23 22:04:25 -07004481int
4482nfs4_client_to_reclaim(const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004483{
4484 unsigned int strhashval;
4485 struct nfs4_client_reclaim *crp = NULL;
4486
NeilBrowna55370a2005-06-23 22:03:52 -07004487 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4488 crp = alloc_reclaim();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004489 if (!crp)
4490 return 0;
NeilBrowna55370a2005-06-23 22:03:52 -07004491 strhashval = clientstr_hashval(name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004492 INIT_LIST_HEAD(&crp->cr_strhash);
4493 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
NeilBrowna55370a2005-06-23 22:03:52 -07004494 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004495 reclaim_str_hashtbl_size++;
4496 return 1;
4497}
4498
Jeff Layton2a4317c2012-03-21 16:42:43 -04004499void
Linus Torvalds1da177e2005-04-16 15:20:36 -07004500nfs4_release_reclaim(void)
4501{
4502 struct nfs4_client_reclaim *crp = NULL;
4503 int i;
4504
Linus Torvalds1da177e2005-04-16 15:20:36 -07004505 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4506 while (!list_empty(&reclaim_str_hashtbl[i])) {
4507 crp = list_entry(reclaim_str_hashtbl[i].next,
4508 struct nfs4_client_reclaim, cr_strhash);
4509 list_del(&crp->cr_strhash);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004510 kfree(crp);
4511 reclaim_str_hashtbl_size--;
4512 }
4513 }
4514 BUG_ON(reclaim_str_hashtbl_size);
4515}
4516
4517/*
4518 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
Jeff Layton2a4317c2012-03-21 16:42:43 -04004519struct nfs4_client_reclaim *
Jeff Laytona52d7262012-03-21 09:52:02 -04004520nfsd4_find_reclaim_client(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521{
4522 unsigned int strhashval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523 struct nfs4_client_reclaim *crp = NULL;
4524
NeilBrowna55370a2005-06-23 22:03:52 -07004525 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4526 clp->cl_name.len, clp->cl_name.data,
4527 clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004528
4529 /* find clp->cl_name in reclaim_str_hashtbl */
NeilBrowna55370a2005-06-23 22:03:52 -07004530 strhashval = clientstr_hashval(clp->cl_recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004531 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
NeilBrowna55370a2005-06-23 22:03:52 -07004532 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004533 return crp;
4534 }
4535 }
4536 return NULL;
4537}
4538
4539/*
4540* Called from OPEN. Look for clientid in reclaim list.
4541*/
Al Virob37ad282006-10-19 23:28:59 -07004542__be32
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04004543nfs4_check_open_reclaim(clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004544{
Jeff Laytona52d7262012-03-21 09:52:02 -04004545 struct nfs4_client *clp;
4546
4547 /* find clientid in conf_id_hashtbl */
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04004548 clp = find_confirmed_client(clid, sessions);
Jeff Laytona52d7262012-03-21 09:52:02 -04004549 if (clp == NULL)
4550 return nfserr_reclaim_bad;
4551
4552 return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004553}
4554
Bryan Schumaker65178db2011-11-01 13:35:21 -04004555#ifdef CONFIG_NFSD_FAULT_INJECTION
4556
4557void nfsd_forget_clients(u64 num)
4558{
4559 struct nfs4_client *clp, *next;
4560 int count = 0;
4561
4562 nfs4_lock_state();
4563 list_for_each_entry_safe(clp, next, &client_lru, cl_lru) {
Jeff Layton2a4317c2012-03-21 16:42:43 -04004564 nfsd4_client_record_remove(clp);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004565 expire_client(clp);
4566 if (++count == num)
4567 break;
4568 }
4569 nfs4_unlock_state();
4570
4571 printk(KERN_INFO "NFSD: Forgot %d clients", count);
4572}
4573
4574static void release_lockowner_sop(struct nfs4_stateowner *sop)
4575{
4576 release_lockowner(lockowner(sop));
4577}
4578
4579static void release_openowner_sop(struct nfs4_stateowner *sop)
4580{
4581 release_openowner(openowner(sop));
4582}
4583
J. Bruce Fields353de312011-11-15 19:25:03 -05004584static int nfsd_release_n_owners(u64 num, bool is_open_owner,
Bryan Schumaker65178db2011-11-01 13:35:21 -04004585 void (*release_sop)(struct nfs4_stateowner *))
4586{
4587 int i, count = 0;
4588 struct nfs4_stateowner *sop, *next;
4589
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004590 for (i = 0; i < OWNER_HASH_SIZE; i++) {
4591 list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) {
4592 if (sop->so_is_open_owner != is_open_owner)
4593 continue;
Bryan Schumaker65178db2011-11-01 13:35:21 -04004594 release_sop(sop);
4595 if (++count == num)
4596 return count;
4597 }
4598 }
4599 return count;
4600}
4601
4602void nfsd_forget_locks(u64 num)
4603{
4604 int count;
4605
4606 nfs4_lock_state();
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004607 count = nfsd_release_n_owners(num, false, release_lockowner_sop);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004608 nfs4_unlock_state();
4609
4610 printk(KERN_INFO "NFSD: Forgot %d locks", count);
4611}
4612
4613void nfsd_forget_openowners(u64 num)
4614{
4615 int count;
4616
4617 nfs4_lock_state();
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004618 count = nfsd_release_n_owners(num, true, release_openowner_sop);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004619 nfs4_unlock_state();
4620
4621 printk(KERN_INFO "NFSD: Forgot %d open owners", count);
4622}
4623
J. Bruce Fieldsda5c80a2012-08-14 16:09:31 -04004624static int nfsd_process_n_delegations(u64 num, struct list_head *list)
Bryan Schumaker65178db2011-11-01 13:35:21 -04004625{
4626 int i, count = 0;
Bryan Schumaker2d3475c2011-12-14 14:39:56 -05004627 struct nfs4_file *fp, *fnext;
4628 struct nfs4_delegation *dp, *dnext;
Bryan Schumaker65178db2011-11-01 13:35:21 -04004629
4630 for (i = 0; i < FILE_HASH_SIZE; i++) {
Bryan Schumaker2d3475c2011-12-14 14:39:56 -05004631 list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) {
4632 list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) {
Stanislav Kinsburskya6d88f22012-05-25 18:38:50 +04004633 list_move(&dp->dl_recall_lru, list);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004634 if (++count == num)
4635 return count;
4636 }
4637 }
4638 }
Bryan Schumaker2d3475c2011-12-14 14:39:56 -05004639
Bryan Schumaker65178db2011-11-01 13:35:21 -04004640 return count;
4641}
4642
4643void nfsd_forget_delegations(u64 num)
4644{
4645 unsigned int count;
Stanislav Kinsburskya6d88f22012-05-25 18:38:50 +04004646 LIST_HEAD(victims);
4647 struct nfs4_delegation *dp, *dnext;
4648
4649 spin_lock(&recall_lock);
4650 count = nfsd_process_n_delegations(num, &victims);
4651 spin_unlock(&recall_lock);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004652
4653 nfs4_lock_state();
Stanislav Kinsburskya6d88f22012-05-25 18:38:50 +04004654 list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru)
4655 unhash_delegation(dp);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004656 nfs4_unlock_state();
4657
4658 printk(KERN_INFO "NFSD: Forgot %d delegations", count);
4659}
4660
4661void nfsd_recall_delegations(u64 num)
4662{
4663 unsigned int count;
Stanislav Kinsburskya6d88f22012-05-25 18:38:50 +04004664 LIST_HEAD(victims);
4665 struct nfs4_delegation *dp, *dnext;
Bryan Schumaker65178db2011-11-01 13:35:21 -04004666
Bryan Schumaker65178db2011-11-01 13:35:21 -04004667 spin_lock(&recall_lock);
Stanislav Kinsburskya6d88f22012-05-25 18:38:50 +04004668 count = nfsd_process_n_delegations(num, &victims);
4669 list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
4670 list_del(&dp->dl_recall_lru);
4671 nfsd_break_one_deleg(dp);
4672 }
Bryan Schumaker65178db2011-11-01 13:35:21 -04004673 spin_unlock(&recall_lock);
Bryan Schumaker65178db2011-11-01 13:35:21 -04004674
4675 printk(KERN_INFO "NFSD: Recalled %d delegations", count);
4676}
4677
4678#endif /* CONFIG_NFSD_FAULT_INJECTION */
4679
NeilBrownac4d8ff22005-06-23 22:03:30 -07004680/* initialization to perform at module load time: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004681
Bryan Schumaker72083392011-11-01 15:24:59 -04004682void
NeilBrownac4d8ff22005-06-23 22:03:30 -07004683nfs4_state_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004684{
Bryan Schumaker72083392011-11-01 15:24:59 -04004685 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004686
Linus Torvalds1da177e2005-04-16 15:20:36 -07004687 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4688 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
4689 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
4690 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
4691 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
Wang Chen02cb2852009-04-24 15:41:57 +08004692 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004693 }
Marc Eshel5282fd72009-04-03 08:27:52 +03004694 for (i = 0; i < SESSION_HASH_SIZE; i++)
4695 INIT_LIST_HEAD(&sessionid_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004696 for (i = 0; i < FILE_HASH_SIZE; i++) {
4697 INIT_LIST_HEAD(&file_hashtbl[i]);
4698 }
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05004699 for (i = 0; i < OWNER_HASH_SIZE; i++) {
4700 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004701 }
J. Bruce Fields009673b2011-11-07 17:40:10 -05004702 for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
4703 INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004704 INIT_LIST_HEAD(&close_lru);
4705 INIT_LIST_HEAD(&client_lru);
4706 INIT_LIST_HEAD(&del_recall_lru);
NeilBrownac4d8ff22005-06-23 22:03:30 -07004707 reclaim_str_hashtbl_size = 0;
NeilBrownac4d8ff22005-06-23 22:03:30 -07004708}
4709
Meelap Shahc2f1a552007-07-17 04:04:39 -07004710/*
4711 * Since the lifetime of a delegation isn't limited to that of an open, a
4712 * client may quite reasonably hang on to a delegation as long as it has
4713 * the inode cached. This becomes an obvious problem the first time a
4714 * client's inode cache approaches the size of the server's total memory.
4715 *
4716 * For now we avoid this problem by imposing a hard limit on the number
4717 * of delegations, which varies according to the server's memory size.
4718 */
4719static void
4720set_max_delegations(void)
4721{
4722 /*
4723 * Allow at most 4 delegations per megabyte of RAM. Quick
4724 * estimates suggest that in the worst case (where every delegation
4725 * is for a different inode), a delegation could take about 1.5K,
4726 * giving a worst case usage of about 6% of memory.
4727 */
4728 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
4729}
4730
NeilBrownac4d8ff22005-06-23 22:03:30 -07004731/* initialization to perform when the nfsd service is started: */
4732
Jeff Laytona6d6b782012-03-05 11:42:36 -05004733int
4734nfs4_state_start(void)
NeilBrownac4d8ff22005-06-23 22:03:30 -07004735{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004736 struct net *net = &init_net;
4737 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004738 int ret;
4739
Jeff Layton2a4317c2012-03-21 16:42:43 -04004740 /*
4741 * FIXME: For now, we hang most of the pernet global stuff off of
4742 * init_net until nfsd is fully containerized. Eventually, we'll
4743 * need to pass a net pointer into this function, take a reference
4744 * to that instead and then do most of the rest of this on a per-net
4745 * basis.
4746 */
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004747 get_net(net);
4748 nfsd4_client_tracking_init(net);
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04004749 nn->boot_time = get_seconds();
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004750 locks_start_grace(net, &nn->nfsd4_manager);
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04004751 nn->grace_ended = false;
Marc Eshel9a8db972007-07-17 04:04:35 -07004752 printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004753 nfsd4_grace);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004754 ret = set_callback_cred();
Jeff Laytona6d6b782012-03-05 11:42:36 -05004755 if (ret) {
4756 ret = -ENOMEM;
4757 goto out_recovery;
4758 }
NeilBrown58da2822005-06-23 22:03:19 -07004759 laundry_wq = create_singlethread_workqueue("nfsd4");
Jeff Laytona6d6b782012-03-05 11:42:36 -05004760 if (laundry_wq == NULL) {
4761 ret = -ENOMEM;
4762 goto out_recovery;
4763 }
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004764 ret = nfsd4_create_callback_queue();
4765 if (ret)
4766 goto out_free_laundry;
J. Bruce Fieldse46b4982010-03-01 19:21:21 -05004767 queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
Meelap Shahc2f1a552007-07-17 04:04:39 -07004768 set_max_delegations();
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004769 return 0;
4770out_free_laundry:
4771 destroy_workqueue(laundry_wq);
Jeff Laytona6d6b782012-03-05 11:42:36 -05004772out_recovery:
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004773 nfsd4_client_tracking_exit(net);
4774 put_net(net);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05004775 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004776}
4777
Linus Torvalds1da177e2005-04-16 15:20:36 -07004778static void
4779__nfs4_state_shutdown(void)
4780{
4781 int i;
4782 struct nfs4_client *clp = NULL;
4783 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004784 struct list_head *pos, *next, reaplist;
4785
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4787 while (!list_empty(&conf_id_hashtbl[i])) {
4788 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
4789 expire_client(clp);
4790 }
4791 while (!list_empty(&unconf_str_hashtbl[i])) {
4792 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
4793 expire_client(clp);
4794 }
4795 }
4796 INIT_LIST_HEAD(&reaplist);
4797 spin_lock(&recall_lock);
4798 list_for_each_safe(pos, next, &del_recall_lru) {
4799 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4800 list_move(&dp->dl_recall_lru, &reaplist);
4801 }
4802 spin_unlock(&recall_lock);
4803 list_for_each_safe(pos, next, &reaplist) {
4804 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004805 unhash_delegation(dp);
4806 }
4807
Jeff Layton2a4317c2012-03-21 16:42:43 -04004808 nfsd4_client_tracking_exit(&init_net);
4809 put_net(&init_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004810}
4811
4812void
4813nfs4_state_shutdown(void)
4814{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004815 struct net *net = &init_net;
4816 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4817
Tejun Heoafe2c512010-12-14 16:21:17 +01004818 cancel_delayed_work_sync(&laundromat_work);
NeilBrown5e8d5c22006-04-10 22:55:37 -07004819 destroy_workqueue(laundry_wq);
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004820 locks_end_grace(&nn->nfsd4_manager);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004821 nfs4_lock_state();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004822 __nfs4_state_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004823 nfs4_unlock_state();
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04004824 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07004825}
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004826
4827static void
4828get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
4829{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01004830 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
4831 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004832}
4833
4834static void
4835put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
4836{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01004837 if (cstate->minorversion) {
4838 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
4839 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
4840 }
4841}
4842
4843void
4844clear_current_stateid(struct nfsd4_compound_state *cstate)
4845{
4846 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004847}
4848
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01004849/*
4850 * functions to set current state id
4851 */
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004852void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01004853nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
4854{
4855 put_stateid(cstate, &odp->od_stateid);
4856}
4857
4858void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004859nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
4860{
4861 put_stateid(cstate, &open->op_stateid);
4862}
4863
4864void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01004865nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
4866{
4867 put_stateid(cstate, &close->cl_stateid);
4868}
4869
4870void
4871nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
4872{
4873 put_stateid(cstate, &lock->lk_resp_stateid);
4874}
4875
4876/*
4877 * functions to consume current state id
4878 */
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01004879
4880void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01004881nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
4882{
4883 get_stateid(cstate, &odp->od_stateid);
4884}
4885
4886void
4887nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
4888{
4889 get_stateid(cstate, &drp->dr_stateid);
4890}
4891
4892void
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01004893nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
4894{
4895 get_stateid(cstate, &fsp->fr_stateid);
4896}
4897
4898void
4899nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
4900{
4901 get_stateid(cstate, &setattr->sa_stateid);
4902}
4903
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01004904void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004905nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
4906{
4907 get_stateid(cstate, &close->cl_stateid);
4908}
4909
4910void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01004911nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004912{
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01004913 get_stateid(cstate, &locku->lu_stateid);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01004914}
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01004915
4916void
4917nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
4918{
4919 get_stateid(cstate, &read->rd_stateid);
4920}
4921
4922void
4923nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
4924{
4925 get_stateid(cstate, &write->wr_stateid);
4926}