blob: 95202719a1fd26bd27ea71a2fe85ec1c248e8d13 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002* Copyright (c) 2001 The Regents of the University of Michigan.
3* All rights reserved.
4*
5* Kendrick Smith <kmsmith@umich.edu>
6* Andy Adamson <kandros@umich.edu>
7*
8* Redistribution and use in source and binary forms, with or without
9* modification, are permitted provided that the following conditions
10* are met:
11*
12* 1. Redistributions of source code must retain the above copyright
13* notice, this list of conditions and the following disclaimer.
14* 2. Redistributions in binary form must reproduce the above copyright
15* notice, this list of conditions and the following disclaimer in the
16* documentation and/or other materials provided with the distribution.
17* 3. Neither the name of the University nor the names of its
18* contributors may be used to endorse or promote products derived
19* from this software without specific prior written permission.
20*
21* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32*
33*/
34
Dave Hansenaceaf782008-02-15 14:37:31 -080035#include <linux/file.h>
Arnd Bergmannb89f4322010-09-18 15:09:31 +020036#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
NeilBrown0964a3d2005-06-23 22:04:32 -070038#include <linux/namei.h>
Meelap Shahc2f1a552007-07-17 04:04:39 -070039#include <linux/swap.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040040#include <linux/pagemap.h>
Chuck Lever7df302f2012-05-29 13:56:37 -040041#include <linux/ratelimit.h>
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -050042#include <linux/sunrpc/svcauth_gss.h>
Jeff Layton59766872013-02-04 12:50:00 -050043#include <linux/sunrpc/addr.h>
Daniel Borkmann87545892014-12-10 16:33:11 +010044#include <linux/jhash.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020045#include "xdr4.h"
J. Bruce Fields06b332a2013-04-09 11:34:36 -040046#include "xdr4cb.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050047#include "vfs.h"
J. Bruce Fieldsbfa4b362012-04-25 16:49:18 -040048#include "current_stateid.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040050#include "netns.h"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020051#include "pnfs.h"
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +040052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define NFSDDBG_FACILITY NFSDDBG_PROC
54
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050055#define all_ones {{~0,~0},~0}
56static const stateid_t one_stateid = {
57 .si_generation = ~0,
58 .si_opaque = all_ones,
59};
60static const stateid_t zero_stateid = {
61 /* all fields zero */
62};
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010063static const stateid_t currentstateid = {
64 .si_generation = 1,
65};
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050066
Andy Adamsonec6b5d72009-04-03 08:28:28 +030067static u64 current_sessionid = 1;
NeilBrownfd39ca92005-06-23 22:04:03 -070068
J. Bruce Fieldsf32f3c22011-12-12 15:00:35 -050069#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
70#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
Tigran Mkrtchyan19ff0f22012-02-13 22:55:23 +010071#define CURRENT_STATEID(stateid) (!memcmp((stateid), &currentstateid, sizeof(stateid_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/* forward declarations */
Jeff Laytonf9c00c32014-07-23 16:17:41 -040074static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
Trond Myklebust60116952014-07-29 21:34:06 -040075static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
J. Bruce Fields8b671b82009-02-22 14:51:34 -080077/* Locking: */
78
J. Bruce Fields8b671b82009-02-22 14:51:34 -080079/*
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
83 */
Benny Halevycdc97502014-05-30 09:09:30 -040084static DEFINE_SPINLOCK(state_lock);
J. Bruce Fields8b671b82009-02-22 14:51:34 -080085
Jeff Laytonb401be222014-07-29 21:34:33 -040086/*
87 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
88 * the refcount on the open stateid to drop.
89 */
90static DECLARE_WAIT_QUEUE_HEAD(close_wq);
91
Christoph Hellwigabf11352014-05-21 07:43:03 -070092static struct kmem_cache *openowner_slab;
93static struct kmem_cache *lockowner_slab;
94static struct kmem_cache *file_slab;
95static struct kmem_cache *stateid_slab;
96static struct kmem_cache *deleg_slab;
Sachin Bhamare8287f002015-04-27 14:50:14 +020097static struct kmem_cache *odstate_slab;
NeilBrowne60d4392005-06-23 22:03:01 -070098
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -040099static void free_session(struct nfsd4_session *);
Benny Halevy508dc6e2012-02-23 17:40:52 -0800100
Christoph Hellwig0162ac22014-09-24 12:19:19 +0200101static struct nfsd4_callback_ops nfsd4_cb_recall_ops;
102
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400103static bool is_session_dead(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -0800104{
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400105 return ses->se_flags & NFS4_SESSION_DEAD;
106}
107
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -0400108static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
109{
110 if (atomic_read(&ses->se_ref) > ref_held_by_me)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -0400111 return nfserr_jukebox;
112 ses->se_flags |= NFS4_SESSION_DEAD;
113 return nfs_ok;
114}
115
J. Bruce Fields221a6872013-04-01 22:23:49 -0400116static bool is_client_expired(struct nfs4_client *clp)
117{
118 return clp->cl_time == 0;
119}
120
J. Bruce Fields221a6872013-04-01 22:23:49 -0400121static __be32 get_client_locked(struct nfs4_client *clp)
122{
Trond Myklebust0a880a22014-07-30 08:27:10 -0400123 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
124
125 lockdep_assert_held(&nn->client_lock);
126
J. Bruce Fields221a6872013-04-01 22:23:49 -0400127 if (is_client_expired(clp))
128 return nfserr_expired;
129 atomic_inc(&clp->cl_refcount);
130 return nfs_ok;
131}
132
133/* must be called under the client_lock */
134static inline void
135renew_client_locked(struct nfs4_client *clp)
136{
137 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
138
139 if (is_client_expired(clp)) {
140 WARN_ON(1);
141 printk("%s: client (clientid %08x/%08x) already expired\n",
142 __func__,
143 clp->cl_clientid.cl_boot,
144 clp->cl_clientid.cl_id);
145 return;
146 }
147
148 dprintk("renewing client (clientid %08x/%08x)\n",
149 clp->cl_clientid.cl_boot,
150 clp->cl_clientid.cl_id);
151 list_move_tail(&clp->cl_lru, &nn->client_lru);
152 clp->cl_time = get_seconds();
153}
154
Fengguang Wuba138432013-04-16 22:14:15 -0400155static void put_client_renew_locked(struct nfs4_client *clp)
J. Bruce Fields221a6872013-04-01 22:23:49 -0400156{
Trond Myklebust0a880a22014-07-30 08:27:10 -0400157 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
158
159 lockdep_assert_held(&nn->client_lock);
160
J. Bruce Fields221a6872013-04-01 22:23:49 -0400161 if (!atomic_dec_and_test(&clp->cl_refcount))
162 return;
163 if (!is_client_expired(clp))
164 renew_client_locked(clp);
165}
166
Jeff Layton4b24ca72014-06-30 11:48:44 -0400167static void put_client_renew(struct nfs4_client *clp)
168{
169 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
170
Jeff Laytond6c249b2014-07-08 14:02:50 -0400171 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
172 return;
173 if (!is_client_expired(clp))
174 renew_client_locked(clp);
Jeff Layton4b24ca72014-06-30 11:48:44 -0400175 spin_unlock(&nn->client_lock);
176}
177
Trond Myklebustd4e19e702014-06-30 11:48:42 -0400178static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
179{
180 __be32 status;
181
182 if (is_session_dead(ses))
183 return nfserr_badsession;
184 status = get_client_locked(ses->se_client);
185 if (status)
186 return status;
187 atomic_inc(&ses->se_ref);
188 return nfs_ok;
189}
190
191static void nfsd4_put_session_locked(struct nfsd4_session *ses)
192{
193 struct nfs4_client *clp = ses->se_client;
Trond Myklebust0a880a22014-07-30 08:27:10 -0400194 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
195
196 lockdep_assert_held(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -0400197
198 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
199 free_session(ses);
200 put_client_renew_locked(clp);
201}
202
203static void nfsd4_put_session(struct nfsd4_session *ses)
204{
205 struct nfs4_client *clp = ses->se_client;
206 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
207
208 spin_lock(&nn->client_lock);
209 nfsd4_put_session_locked(ses);
210 spin_unlock(&nn->client_lock);
211}
212
Kinglong Meeb5971af2014-08-22 10:18:43 -0400213static inline struct nfs4_stateowner *
214nfs4_get_stateowner(struct nfs4_stateowner *sop)
215{
216 atomic_inc(&sop->so_count);
217 return sop;
218}
219
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400220static int
Trond Myklebustd4f04892014-07-29 21:34:36 -0400221same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400222{
223 return (sop->so_owner.len == owner->len) &&
Trond Myklebustd4f04892014-07-29 21:34:36 -0400224 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400225}
226
227static struct nfs4_openowner *
228find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
Trond Myklebustd4f04892014-07-29 21:34:36 -0400229 struct nfs4_client *clp)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400230{
231 struct nfs4_stateowner *so;
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400232
Trond Myklebustd4f04892014-07-29 21:34:36 -0400233 lockdep_assert_held(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400234
Trond Myklebustd4f04892014-07-29 21:34:36 -0400235 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
236 so_strhash) {
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400237 if (!so->so_is_open_owner)
238 continue;
Kinglong Meeb5971af2014-08-22 10:18:43 -0400239 if (same_owner_str(so, &open->op_owner))
240 return openowner(nfs4_get_stateowner(so));
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400241 }
242 return NULL;
243}
244
245static struct nfs4_openowner *
246find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
Trond Myklebustd4f04892014-07-29 21:34:36 -0400247 struct nfs4_client *clp)
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400248{
249 struct nfs4_openowner *oo;
250
Trond Myklebustd4f04892014-07-29 21:34:36 -0400251 spin_lock(&clp->cl_lock);
252 oo = find_openstateowner_str_locked(hashval, open, clp);
253 spin_unlock(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -0400254 return oo;
255}
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257static inline u32
258opaque_hashval(const void *ptr, int nbytes)
259{
260 unsigned char *cptr = (unsigned char *) ptr;
261
262 u32 x = 0;
263 while (nbytes--) {
264 x *= 37;
265 x += *cptr++;
266 }
267 return x;
268}
269
Jeff Layton5b095e92014-10-23 08:01:02 -0400270static void nfsd4_free_file_rcu(struct rcu_head *rcu)
J. Bruce Fields32513b42011-10-13 16:00:16 -0400271{
Jeff Layton5b095e92014-10-23 08:01:02 -0400272 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
273
274 kmem_cache_free(file_slab, fp);
J. Bruce Fields32513b42011-10-13 16:00:16 -0400275}
276
Christoph Hellwige6ba76e2014-08-14 08:50:16 +0200277void
NeilBrown13cd2182005-06-23 22:03:10 -0700278put_nfs4_file(struct nfs4_file *fi)
279{
Jeff Layton02e12152014-07-16 10:31:57 -0400280 might_lock(&state_lock);
281
Benny Halevycdc97502014-05-30 09:09:30 -0400282 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
Jeff Layton5b095e92014-10-23 08:01:02 -0400283 hlist_del_rcu(&fi->fi_hash);
Benny Halevycdc97502014-05-30 09:09:30 -0400284 spin_unlock(&state_lock);
Sachin Bhamare8287f002015-04-27 14:50:14 +0200285 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
Jeff Layton5b095e92014-10-23 08:01:02 -0400286 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
287 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800288 }
NeilBrown13cd2182005-06-23 22:03:10 -0700289}
290
Trond Myklebustde186432014-07-10 14:07:26 -0400291static struct file *
292__nfs4_get_fd(struct nfs4_file *f, int oflag)
293{
294 if (f->fi_fds[oflag])
295 return get_file(f->fi_fds[oflag]);
296 return NULL;
297}
298
299static struct file *
300find_writeable_file_locked(struct nfs4_file *f)
301{
302 struct file *ret;
303
304 lockdep_assert_held(&f->fi_lock);
305
306 ret = __nfs4_get_fd(f, O_WRONLY);
307 if (!ret)
308 ret = __nfs4_get_fd(f, O_RDWR);
309 return ret;
310}
311
312static struct file *
313find_writeable_file(struct nfs4_file *f)
314{
315 struct file *ret;
316
317 spin_lock(&f->fi_lock);
318 ret = find_writeable_file_locked(f);
319 spin_unlock(&f->fi_lock);
320
321 return ret;
322}
323
324static struct file *find_readable_file_locked(struct nfs4_file *f)
325{
326 struct file *ret;
327
328 lockdep_assert_held(&f->fi_lock);
329
330 ret = __nfs4_get_fd(f, O_RDONLY);
331 if (!ret)
332 ret = __nfs4_get_fd(f, O_RDWR);
333 return ret;
334}
335
336static struct file *
337find_readable_file(struct nfs4_file *f)
338{
339 struct file *ret;
340
341 spin_lock(&f->fi_lock);
342 ret = find_readable_file_locked(f);
343 spin_unlock(&f->fi_lock);
344
345 return ret;
346}
347
Christoph Hellwig4d227fc2014-08-17 07:40:00 -0500348struct file *
Trond Myklebustde186432014-07-10 14:07:26 -0400349find_any_file(struct nfs4_file *f)
350{
351 struct file *ret;
352
353 spin_lock(&f->fi_lock);
354 ret = __nfs4_get_fd(f, O_RDWR);
355 if (!ret) {
356 ret = __nfs4_get_fd(f, O_WRONLY);
357 if (!ret)
358 ret = __nfs4_get_fd(f, O_RDONLY);
359 }
360 spin_unlock(&f->fi_lock);
361 return ret;
362}
363
Trond Myklebust02a35082014-07-25 07:34:22 -0400364static atomic_long_t num_delegations;
Zhang Yanfei697ce9b2013-02-22 16:35:47 -0800365unsigned long max_delegations;
NeilBrownef0f3392006-04-10 22:55:41 -0700366
367/*
368 * Open owner state (share locks)
369 */
370
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500371/* hash tables for lock and open owners */
372#define OWNER_HASH_BITS 8
373#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
374#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
NeilBrownef0f3392006-04-10 22:55:41 -0700375
Trond Myklebustd4f04892014-07-29 21:34:36 -0400376static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400377{
378 unsigned int ret;
379
380 ret = opaque_hashval(ownername->data, ownername->len);
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -0500381 return ret & OWNER_HASH_MASK;
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400382}
NeilBrownef0f3392006-04-10 22:55:41 -0700383
NeilBrownef0f3392006-04-10 22:55:41 -0700384/* hash table for nfs4_file */
385#define FILE_HASH_BITS 8
386#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
Shan Wei35079582011-01-14 17:35:59 +0800387
Trond Myklebustca943212014-07-23 16:17:39 -0400388static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400389{
Trond Myklebustca943212014-07-23 16:17:39 -0400390 return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
391}
392
393static unsigned int file_hashval(struct knfsd_fh *fh)
394{
395 return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
396}
397
Jeff Layton89876f82013-04-02 09:01:59 -0400398static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
NeilBrownef0f3392006-04-10 22:55:41 -0700399
Jeff Layton12659652014-07-10 14:07:28 -0400400static void
401__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields34775652013-08-23 17:55:18 -0400402{
Jeff Layton7214e862014-07-10 14:07:33 -0400403 lockdep_assert_held(&fp->fi_lock);
404
Jeff Layton12659652014-07-10 14:07:28 -0400405 if (access & NFS4_SHARE_ACCESS_WRITE)
406 atomic_inc(&fp->fi_access[O_WRONLY]);
407 if (access & NFS4_SHARE_ACCESS_READ)
408 atomic_inc(&fp->fi_access[O_RDONLY]);
J. Bruce Fields34775652013-08-23 17:55:18 -0400409}
410
Jeff Layton12659652014-07-10 14:07:28 -0400411static __be32
412nfs4_file_get_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields998db522010-08-07 09:21:41 -0400413{
Jeff Layton7214e862014-07-10 14:07:33 -0400414 lockdep_assert_held(&fp->fi_lock);
415
Jeff Layton12659652014-07-10 14:07:28 -0400416 /* Does this access mode make sense? */
417 if (access & ~NFS4_SHARE_ACCESS_BOTH)
418 return nfserr_inval;
419
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400420 /* Does it conflict with a deny mode already set? */
421 if ((access & fp->fi_share_deny) != 0)
422 return nfserr_share_denied;
423
Jeff Layton12659652014-07-10 14:07:28 -0400424 __nfs4_file_get_access(fp, access);
425 return nfs_ok;
J. Bruce Fields998db522010-08-07 09:21:41 -0400426}
427
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400428static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
429{
430 /* Common case is that there is no deny mode. */
431 if (deny) {
432 /* Does this deny mode make sense? */
433 if (deny & ~NFS4_SHARE_DENY_BOTH)
434 return nfserr_inval;
435
436 if ((deny & NFS4_SHARE_DENY_READ) &&
437 atomic_read(&fp->fi_access[O_RDONLY]))
438 return nfserr_share_denied;
439
440 if ((deny & NFS4_SHARE_DENY_WRITE) &&
441 atomic_read(&fp->fi_access[O_WRONLY]))
442 return nfserr_share_denied;
443 }
444 return nfs_ok;
445}
446
J. Bruce Fields998db522010-08-07 09:21:41 -0400447static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400448{
Trond Myklebustde186432014-07-10 14:07:26 -0400449 might_lock(&fp->fi_lock);
450
451 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
452 struct file *f1 = NULL;
453 struct file *f2 = NULL;
454
Jeff Layton6d338b52014-07-10 14:07:29 -0400455 swap(f1, fp->fi_fds[oflag]);
J. Bruce Fields0c7c3e62013-03-28 20:37:14 -0400456 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
Jeff Layton6d338b52014-07-10 14:07:29 -0400457 swap(f2, fp->fi_fds[O_RDWR]);
Trond Myklebustde186432014-07-10 14:07:26 -0400458 spin_unlock(&fp->fi_lock);
459 if (f1)
460 fput(f1);
461 if (f2)
462 fput(f2);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400463 }
464}
465
Jeff Layton12659652014-07-10 14:07:28 -0400466static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
J. Bruce Fields998db522010-08-07 09:21:41 -0400467{
Jeff Layton12659652014-07-10 14:07:28 -0400468 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
469
470 if (access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields998db522010-08-07 09:21:41 -0400471 __nfs4_file_put_access(fp, O_WRONLY);
Jeff Layton12659652014-07-10 14:07:28 -0400472 if (access & NFS4_SHARE_ACCESS_READ)
473 __nfs4_file_put_access(fp, O_RDONLY);
J. Bruce Fields998db522010-08-07 09:21:41 -0400474}
475
Sachin Bhamare8287f002015-04-27 14:50:14 +0200476/*
477 * Allocate a new open/delegation state counter. This is needed for
478 * pNFS for proper return on close semantics.
479 *
480 * Note that we only allocate it for pNFS-enabled exports, otherwise
481 * all pointers to struct nfs4_clnt_odstate are always NULL.
482 */
483static struct nfs4_clnt_odstate *
484alloc_clnt_odstate(struct nfs4_client *clp)
485{
486 struct nfs4_clnt_odstate *co;
487
488 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
489 if (co) {
490 co->co_client = clp;
491 atomic_set(&co->co_odcount, 1);
492 }
493 return co;
494}
495
496static void
497hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
498{
499 struct nfs4_file *fp = co->co_file;
500
501 lockdep_assert_held(&fp->fi_lock);
502 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
503}
504
505static inline void
506get_clnt_odstate(struct nfs4_clnt_odstate *co)
507{
508 if (co)
509 atomic_inc(&co->co_odcount);
510}
511
512static void
513put_clnt_odstate(struct nfs4_clnt_odstate *co)
514{
515 struct nfs4_file *fp;
516
517 if (!co)
518 return;
519
520 fp = co->co_file;
521 if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
522 list_del(&co->co_perfile);
523 spin_unlock(&fp->fi_lock);
524
525 nfsd4_return_all_file_layouts(co->co_client, fp);
526 kmem_cache_free(odstate_slab, co);
527 }
528}
529
530static struct nfs4_clnt_odstate *
531find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
532{
533 struct nfs4_clnt_odstate *co;
534 struct nfs4_client *cl;
535
536 if (!new)
537 return NULL;
538
539 cl = new->co_client;
540
541 spin_lock(&fp->fi_lock);
542 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
543 if (co->co_client == cl) {
544 get_clnt_odstate(co);
545 goto out;
546 }
547 }
548 co = new;
549 co->co_file = fp;
550 hash_clnt_odstate_locked(new);
551out:
552 spin_unlock(&fp->fi_lock);
553 return co;
554}
555
Christoph Hellwigcd61c522014-08-14 08:44:57 +0200556struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl,
Trond Myklebust60116952014-07-29 21:34:06 -0400557 struct kmem_cache *slab)
J. Bruce Fields996e0932011-10-17 11:14:48 -0400558{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500559 struct nfs4_stid *stid;
560 int new_id;
561
Trond Myklebustf8338832014-07-25 07:34:19 -0400562 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500563 if (!stid)
564 return NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400565
Jeff Layton4770d722014-07-29 21:34:10 -0400566 idr_preload(GFP_KERNEL);
567 spin_lock(&cl->cl_lock);
568 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
569 spin_unlock(&cl->cl_lock);
570 idr_preload_end();
Tejun Heoebd6c702013-03-13 14:59:37 -0700571 if (new_id < 0)
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500572 goto out_free;
573 stid->sc_client = cl;
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500574 stid->sc_stateid.si_opaque.so_id = new_id;
575 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
576 /* Will be incremented before return to client: */
Trond Myklebust72c0b0f2014-07-21 09:34:58 -0400577 atomic_set(&stid->sc_count, 1);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500578
J. Bruce Fields996e0932011-10-17 11:14:48 -0400579 /*
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500580 * It shouldn't be a problem to reuse an opaque stateid value.
581 * I don't think it is for 4.1. But with 4.0 I worry that, for
582 * example, a stray write retransmission could be accepted by
583 * the server when it should have been rejected. Therefore,
584 * adopt a trick from the sctp code to attempt to maximize the
585 * amount of time until an id is reused, by ensuring they always
586 * "increase" (mod INT_MAX):
J. Bruce Fields996e0932011-10-17 11:14:48 -0400587 */
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500588 return stid;
589out_free:
Wei Yongjun2c44a232013-04-09 14:15:31 +0800590 kmem_cache_free(slab, stid);
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500591 return NULL;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400592}
593
Jeff Laytonb49e0842014-07-29 21:34:11 -0400594static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400595{
Trond Myklebust60116952014-07-29 21:34:06 -0400596 struct nfs4_stid *stid;
597 struct nfs4_ol_stateid *stp;
598
599 stid = nfs4_alloc_stid(clp, stateid_slab);
600 if (!stid)
601 return NULL;
602
603 stp = openlockstateid(stid);
604 stp->st_stid.sc_free = nfs4_free_ol_stateid;
605 return stp;
606}
607
608static void nfs4_free_deleg(struct nfs4_stid *stid)
609{
Trond Myklebust60116952014-07-29 21:34:06 -0400610 kmem_cache_free(deleg_slab, stid);
611 atomic_long_dec(&num_delegations);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -0400612}
613
NeilBrown6282cd52014-06-04 17:39:26 +1000614/*
615 * When we recall a delegation, we should be careful not to hand it
616 * out again straight away.
617 * To ensure this we keep a pair of bloom filters ('new' and 'old')
618 * in which the filehandles of recalled delegations are "stored".
619 * If a filehandle appear in either filter, a delegation is blocked.
620 * When a delegation is recalled, the filehandle is stored in the "new"
621 * filter.
622 * Every 30 seconds we swap the filters and clear the "new" one,
623 * unless both are empty of course.
624 *
625 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
626 * low 3 bytes as hash-table indices.
627 *
Jeff Laytonf54fe962014-07-25 07:34:26 -0400628 * 'blocked_delegations_lock', which is always taken in block_delegations(),
NeilBrown6282cd52014-06-04 17:39:26 +1000629 * is used to manage concurrent access. Testing does not need the lock
630 * except when swapping the two filters.
631 */
Jeff Laytonf54fe962014-07-25 07:34:26 -0400632static DEFINE_SPINLOCK(blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000633static struct bloom_pair {
634 int entries, old_entries;
635 time_t swap_time;
636 int new; /* index into 'set' */
637 DECLARE_BITMAP(set[2], 256);
638} blocked_delegations;
639
640static int delegation_blocked(struct knfsd_fh *fh)
641{
642 u32 hash;
643 struct bloom_pair *bd = &blocked_delegations;
644
645 if (bd->entries == 0)
646 return 0;
647 if (seconds_since_boot() - bd->swap_time > 30) {
Jeff Laytonf54fe962014-07-25 07:34:26 -0400648 spin_lock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000649 if (seconds_since_boot() - bd->swap_time > 30) {
650 bd->entries -= bd->old_entries;
651 bd->old_entries = bd->entries;
652 memset(bd->set[bd->new], 0,
653 sizeof(bd->set[0]));
654 bd->new = 1-bd->new;
655 bd->swap_time = seconds_since_boot();
656 }
Jeff Laytonf54fe962014-07-25 07:34:26 -0400657 spin_unlock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000658 }
Daniel Borkmann87545892014-12-10 16:33:11 +0100659 hash = jhash(&fh->fh_base, fh->fh_size, 0);
NeilBrown6282cd52014-06-04 17:39:26 +1000660 if (test_bit(hash&255, bd->set[0]) &&
661 test_bit((hash>>8)&255, bd->set[0]) &&
662 test_bit((hash>>16)&255, bd->set[0]))
663 return 1;
664
665 if (test_bit(hash&255, bd->set[1]) &&
666 test_bit((hash>>8)&255, bd->set[1]) &&
667 test_bit((hash>>16)&255, bd->set[1]))
668 return 1;
669
670 return 0;
671}
672
673static void block_delegations(struct knfsd_fh *fh)
674{
675 u32 hash;
676 struct bloom_pair *bd = &blocked_delegations;
677
Daniel Borkmann87545892014-12-10 16:33:11 +0100678 hash = jhash(&fh->fh_base, fh->fh_size, 0);
NeilBrown6282cd52014-06-04 17:39:26 +1000679
Jeff Laytonf54fe962014-07-25 07:34:26 -0400680 spin_lock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000681 __set_bit(hash&255, bd->set[bd->new]);
682 __set_bit((hash>>8)&255, bd->set[bd->new]);
683 __set_bit((hash>>16)&255, bd->set[bd->new]);
684 if (bd->entries == 0)
685 bd->swap_time = seconds_since_boot();
686 bd->entries += 1;
Jeff Laytonf54fe962014-07-25 07:34:26 -0400687 spin_unlock(&blocked_delegations_lock);
NeilBrown6282cd52014-06-04 17:39:26 +1000688}
689
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690static struct nfs4_delegation *
Sachin Bhamare8287f002015-04-27 14:50:14 +0200691alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh,
692 struct nfs4_clnt_odstate *odstate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693{
694 struct nfs4_delegation *dp;
Trond Myklebust02a35082014-07-25 07:34:22 -0400695 long n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 dprintk("NFSD alloc_init_deleg\n");
Trond Myklebust02a35082014-07-25 07:34:22 -0400698 n = atomic_long_inc_return(&num_delegations);
699 if (n < 0 || n > max_delegations)
700 goto out_dec;
NeilBrown6282cd52014-06-04 17:39:26 +1000701 if (delegation_blocked(&current_fh->fh_handle))
Trond Myklebust02a35082014-07-25 07:34:22 -0400702 goto out_dec;
J. Bruce Fields996e0932011-10-17 11:14:48 -0400703 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
NeilBrown5b2d21c2005-06-23 22:03:04 -0700704 if (dp == NULL)
Trond Myklebust02a35082014-07-25 07:34:22 -0400705 goto out_dec;
Trond Myklebust60116952014-07-29 21:34:06 -0400706
707 dp->dl_stid.sc_free = nfs4_free_deleg;
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400708 /*
709 * delegation seqid's are never incremented. The 4.1 special
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400710 * meaning of seqid 0 isn't meaningful, really, but let's avoid
711 * 0 anyway just for consistency and use 1:
J. Bruce Fields2a74aba2011-09-23 17:20:02 -0400712 */
713 dp->dl_stid.sc_stateid.si_generation = 1;
NeilBrownea1da632005-06-23 22:04:17 -0700714 INIT_LIST_HEAD(&dp->dl_perfile);
715 INIT_LIST_HEAD(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 INIT_LIST_HEAD(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +0200717 dp->dl_clnt_odstate = odstate;
718 get_clnt_odstate(odstate);
J. Bruce Fields99c41512013-05-21 16:21:25 -0400719 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
Christoph Hellwigf0b5de12014-09-24 12:19:18 +0200720 dp->dl_retries = 1;
721 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
Christoph Hellwig0162ac22014-09-24 12:19:19 +0200722 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 return dp;
Trond Myklebust02a35082014-07-25 07:34:22 -0400724out_dec:
725 atomic_long_dec(&num_delegations);
726 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
729void
Trond Myklebust60116952014-07-29 21:34:06 -0400730nfs4_put_stid(struct nfs4_stid *s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731{
Trond Myklebust11b91642014-07-29 21:34:08 -0400732 struct nfs4_file *fp = s->sc_file;
Trond Myklebust60116952014-07-29 21:34:06 -0400733 struct nfs4_client *clp = s->sc_client;
734
Jeff Layton4770d722014-07-29 21:34:10 -0400735 might_lock(&clp->cl_lock);
736
Jeff Laytonb401be222014-07-29 21:34:33 -0400737 if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
738 wake_up_all(&close_wq);
Trond Myklebust60116952014-07-29 21:34:06 -0400739 return;
Jeff Laytonb401be222014-07-29 21:34:33 -0400740 }
Trond Myklebust60116952014-07-29 21:34:06 -0400741 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
Jeff Layton4770d722014-07-29 21:34:10 -0400742 spin_unlock(&clp->cl_lock);
Trond Myklebust60116952014-07-29 21:34:06 -0400743 s->sc_free(s);
Trond Myklebust11b91642014-07-29 21:34:08 -0400744 if (fp)
745 put_nfs4_file(fp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746}
747
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500748static void nfs4_put_deleg_lease(struct nfs4_file *fp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749{
Jeff Layton6bcc0342014-08-09 10:22:40 -0400750 struct file *filp = NULL;
Jeff Layton417c6622014-07-21 09:34:57 -0400751
Jeff Layton6bcc0342014-08-09 10:22:40 -0400752 spin_lock(&fp->fi_lock);
Jeff Layton67db1032014-12-13 09:11:40 -0500753 if (fp->fi_deleg_file && --fp->fi_delegees == 0)
Jeff Layton6bcc0342014-08-09 10:22:40 -0400754 swap(filp, fp->fi_deleg_file);
Jeff Layton6bcc0342014-08-09 10:22:40 -0400755 spin_unlock(&fp->fi_lock);
756
757 if (filp) {
Christoph Hellwig2ab99ee2015-01-21 19:14:02 +0100758 vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp);
Jeff Layton6bcc0342014-08-09 10:22:40 -0400759 fput(filp);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500760 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761}
762
Christoph Hellwigcd61c522014-08-14 08:44:57 +0200763void nfs4_unhash_stid(struct nfs4_stid *s)
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400764{
J. Bruce Fields3abdb602013-02-03 12:23:01 -0500765 s->sc_type = 0;
J. Bruce Fields6136d2b2011-09-23 16:21:15 -0400766}
767
Benny Halevy931ee562014-05-30 09:09:27 -0400768static void
769hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
770{
Benny Halevycdc97502014-05-30 09:09:30 -0400771 lockdep_assert_held(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -0400772 lockdep_assert_held(&fp->fi_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400773
Trond Myklebust67cb1272014-07-29 21:34:17 -0400774 atomic_inc(&dp->dl_stid.sc_count);
Benny Halevy3fb87d12014-05-30 09:09:31 -0400775 dp->dl_stid.sc_type = NFS4_DELEG_STID;
Benny Halevy931ee562014-05-30 09:09:27 -0400776 list_add(&dp->dl_perfile, &fp->fi_delegations);
777 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
778}
779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780static void
Jeff Layton42690672014-07-25 07:34:20 -0400781unhash_delegation_locked(struct nfs4_delegation *dp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782{
Trond Myklebust11b91642014-07-29 21:34:08 -0400783 struct nfs4_file *fp = dp->dl_stid.sc_file;
Jeff Layton02e12152014-07-16 10:31:57 -0400784
Jeff Layton42690672014-07-25 07:34:20 -0400785 lockdep_assert_held(&state_lock);
786
Trond Myklebustb0fc29d2014-07-16 10:31:59 -0400787 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
Jeff Laytond55a1662014-07-22 13:52:06 -0400788 /* Ensure that deleg break won't try to requeue it */
789 ++dp->dl_time;
Jeff Layton417c6622014-07-21 09:34:57 -0400790 spin_lock(&fp->fi_lock);
Benny Halevy931ee562014-05-30 09:09:27 -0400791 list_del_init(&dp->dl_perclnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 list_del_init(&dp->dl_recall_lru);
Jeff Layton02e12152014-07-16 10:31:57 -0400793 list_del_init(&dp->dl_perfile);
794 spin_unlock(&fp->fi_lock);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400795}
796
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400797static void destroy_delegation(struct nfs4_delegation *dp)
798{
Jeff Layton42690672014-07-25 07:34:20 -0400799 spin_lock(&state_lock);
800 unhash_delegation_locked(dp);
801 spin_unlock(&state_lock);
Sachin Bhamare8287f002015-04-27 14:50:14 +0200802 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -0400803 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
Trond Myklebust60116952014-07-29 21:34:06 -0400804 nfs4_put_stid(&dp->dl_stid);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400805}
806
807static void revoke_delegation(struct nfs4_delegation *dp)
808{
809 struct nfs4_client *clp = dp->dl_stid.sc_client;
810
Jeff Layton2d4a5322014-07-25 07:34:21 -0400811 WARN_ON(!list_empty(&dp->dl_recall_lru));
812
Sachin Bhamare8287f002015-04-27 14:50:14 +0200813 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -0400814 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
815
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400816 if (clp->cl_minorversion == 0)
Trond Myklebust60116952014-07-29 21:34:06 -0400817 nfs4_put_stid(&dp->dl_stid);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400818 else {
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400819 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
Jeff Layton2d4a5322014-07-25 07:34:21 -0400820 spin_lock(&clp->cl_lock);
821 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
822 spin_unlock(&clp->cl_lock);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -0400823 }
824}
825
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826/*
827 * SETCLIENTID state
828 */
829
J. Bruce Fieldsddc04c42011-07-30 23:46:29 -0400830static unsigned int clientid_hashval(u32 id)
831{
832 return id & CLIENT_HASH_MASK;
833}
834
835static unsigned int clientstr_hashval(const char *name)
836{
837 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
838}
839
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840/*
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400841 * We store the NONE, READ, WRITE, and BOTH bits separately in the
842 * st_{access,deny}_bmap field of the stateid, in order to track not
843 * only what share bits are currently in force, but also what
844 * combinations of share bits previous opens have used. This allows us
845 * to enforce the recommendation of rfc 3530 14.2.19 that the server
846 * return an error if the client attempt to downgrade to a combination
847 * of share bits not explicable by closing some of its previous opens.
848 *
849 * XXX: This enforcement is actually incomplete, since we don't keep
850 * track of access/deny bit combinations; so, e.g., we allow:
851 *
852 * OPEN allow read, deny write
853 * OPEN allow both, deny none
854 * DOWNGRADE allow read, deny none
855 *
856 * which we should reject.
857 */
Jeff Layton5ae037e2012-05-11 09:45:11 -0400858static unsigned int
859bmap_to_share_mode(unsigned long bmap) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400860 int i;
Jeff Layton5ae037e2012-05-11 09:45:11 -0400861 unsigned int access = 0;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400862
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400863 for (i = 1; i < 4; i++) {
864 if (test_bit(i, &bmap))
Jeff Layton5ae037e2012-05-11 09:45:11 -0400865 access |= i;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400866 }
Jeff Layton5ae037e2012-05-11 09:45:11 -0400867 return access;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400868}
869
Jeff Layton82c5ff12012-05-11 09:45:13 -0400870/* set share access for a given stateid */
871static inline void
872set_access(u32 access, struct nfs4_ol_stateid *stp)
873{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400874 unsigned char mask = 1 << access;
875
876 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
877 stp->st_access_bmap |= mask;
Jeff Layton82c5ff12012-05-11 09:45:13 -0400878}
879
880/* clear share access for a given stateid */
881static inline void
882clear_access(u32 access, struct nfs4_ol_stateid *stp)
883{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400884 unsigned char mask = 1 << access;
885
886 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
887 stp->st_access_bmap &= ~mask;
Jeff Layton82c5ff12012-05-11 09:45:13 -0400888}
889
890/* test whether a given stateid has access */
891static inline bool
892test_access(u32 access, struct nfs4_ol_stateid *stp)
893{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400894 unsigned char mask = 1 << access;
895
896 return (bool)(stp->st_access_bmap & mask);
Jeff Layton82c5ff12012-05-11 09:45:13 -0400897}
898
Jeff Laytonce0fc432012-05-11 09:45:14 -0400899/* set share deny for a given stateid */
900static inline void
Jeff Laytonc11c5912014-07-10 14:07:30 -0400901set_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400902{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400903 unsigned char mask = 1 << deny;
904
905 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
906 stp->st_deny_bmap |= mask;
Jeff Laytonce0fc432012-05-11 09:45:14 -0400907}
908
909/* clear share deny for a given stateid */
910static inline void
Jeff Laytonc11c5912014-07-10 14:07:30 -0400911clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400912{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400913 unsigned char mask = 1 << deny;
914
915 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
916 stp->st_deny_bmap &= ~mask;
Jeff Laytonce0fc432012-05-11 09:45:14 -0400917}
918
919/* test whether a given stateid is denying specific access */
920static inline bool
Jeff Laytonc11c5912014-07-10 14:07:30 -0400921test_deny(u32 deny, struct nfs4_ol_stateid *stp)
Jeff Laytonce0fc432012-05-11 09:45:14 -0400922{
Jeff Laytonc11c5912014-07-10 14:07:30 -0400923 unsigned char mask = 1 << deny;
924
925 return (bool)(stp->st_deny_bmap & mask);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400926}
927
928static int nfs4_access_to_omode(u32 access)
929{
J. Bruce Fields8f34a432010-09-02 15:23:16 -0400930 switch (access & NFS4_SHARE_ACCESS_BOTH) {
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400931 case NFS4_SHARE_ACCESS_READ:
932 return O_RDONLY;
933 case NFS4_SHARE_ACCESS_WRITE:
934 return O_WRONLY;
935 case NFS4_SHARE_ACCESS_BOTH:
936 return O_RDWR;
937 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -0500938 WARN_ON_ONCE(1);
939 return O_RDONLY;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400940}
941
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400942/*
943 * A stateid that had a deny mode associated with it is being released
944 * or downgraded. Recalculate the deny mode on the file.
945 */
946static void
947recalculate_deny_mode(struct nfs4_file *fp)
948{
949 struct nfs4_ol_stateid *stp;
950
951 spin_lock(&fp->fi_lock);
952 fp->fi_share_deny = 0;
953 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
954 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
955 spin_unlock(&fp->fi_lock);
956}
957
958static void
959reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
960{
961 int i;
962 bool change = false;
963
964 for (i = 1; i < 4; i++) {
965 if ((i & deny) != i) {
966 change = true;
967 clear_deny(i, stp);
968 }
969 }
970
971 /* Recalculate per-file deny mode if there was a change */
972 if (change)
Trond Myklebust11b91642014-07-29 21:34:08 -0400973 recalculate_deny_mode(stp->st_stid.sc_file);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400974}
975
Jeff Layton82c5ff12012-05-11 09:45:13 -0400976/* release all access and file references for a given stateid */
977static void
978release_all_access(struct nfs4_ol_stateid *stp)
979{
980 int i;
Trond Myklebust11b91642014-07-29 21:34:08 -0400981 struct nfs4_file *fp = stp->st_stid.sc_file;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -0400982
983 if (fp && stp->st_deny_bmap != 0)
984 recalculate_deny_mode(fp);
Jeff Layton82c5ff12012-05-11 09:45:13 -0400985
986 for (i = 1; i < 4; i++) {
987 if (test_access(i, stp))
Trond Myklebust11b91642014-07-29 21:34:08 -0400988 nfs4_file_put_access(stp->st_stid.sc_file, i);
Jeff Layton82c5ff12012-05-11 09:45:13 -0400989 clear_access(i, stp);
990 }
991}
992
Jeff Layton6b180f02014-07-29 21:34:26 -0400993static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
994{
Jeff Laytona819ecc2014-07-29 21:34:38 -0400995 struct nfs4_client *clp = sop->so_client;
996
997 might_lock(&clp->cl_lock);
998
999 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
Jeff Layton6b180f02014-07-29 21:34:26 -04001000 return;
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001001 sop->so_ops->so_unhash(sop);
Jeff Laytona819ecc2014-07-29 21:34:38 -04001002 spin_unlock(&clp->cl_lock);
Jeff Layton6b180f02014-07-29 21:34:26 -04001003 kfree(sop->so_owner.data);
1004 sop->so_ops->so_free(sop);
1005}
1006
Jeff Layton4ae098d2014-07-29 21:34:43 -04001007static void unhash_ol_stateid(struct nfs4_ol_stateid *stp)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001008{
Trond Myklebust11b91642014-07-29 21:34:08 -04001009 struct nfs4_file *fp = stp->st_stid.sc_file;
Trond Myklebust1d31a252014-07-10 14:07:25 -04001010
Jeff Layton1c755dc2014-07-29 21:34:12 -04001011 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1012
Trond Myklebust1d31a252014-07-10 14:07:25 -04001013 spin_lock(&fp->fi_lock);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001014 list_del(&stp->st_perfile);
Trond Myklebust1d31a252014-07-10 14:07:25 -04001015 spin_unlock(&fp->fi_lock);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001016 list_del(&stp->st_perstateowner);
1017}
1018
Trond Myklebust60116952014-07-29 21:34:06 -04001019static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001020{
Trond Myklebust60116952014-07-29 21:34:06 -04001021 struct nfs4_ol_stateid *stp = openlockstateid(stid);
J. Bruce Fields4665e2b2011-09-06 14:50:49 -04001022
Sachin Bhamare8287f002015-04-27 14:50:14 +02001023 put_clnt_odstate(stp->st_clnt_odstate);
Trond Myklebust60116952014-07-29 21:34:06 -04001024 release_all_access(stp);
Jeff Laytond3134b12014-07-29 21:34:32 -04001025 if (stp->st_stateowner)
1026 nfs4_put_stateowner(stp->st_stateowner);
Trond Myklebust60116952014-07-29 21:34:06 -04001027 kmem_cache_free(stateid_slab, stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001028}
1029
Jeff Laytonb49e0842014-07-29 21:34:11 -04001030static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001031{
Jeff Laytonb49e0842014-07-29 21:34:11 -04001032 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1033 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001034 struct file *file;
1035
Jeff Laytonb49e0842014-07-29 21:34:11 -04001036 file = find_any_file(stp->st_stid.sc_file);
1037 if (file)
1038 filp_close(file, (fl_owner_t)lo);
1039 nfs4_free_ol_stateid(stid);
1040}
1041
Jeff Layton2c41beb2014-07-29 21:34:41 -04001042/*
1043 * Put the persistent reference to an already unhashed generic stateid, while
1044 * holding the cl_lock. If it's the last reference, then put it onto the
1045 * reaplist for later destruction.
1046 */
1047static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1048 struct list_head *reaplist)
1049{
1050 struct nfs4_stid *s = &stp->st_stid;
1051 struct nfs4_client *clp = s->sc_client;
1052
1053 lockdep_assert_held(&clp->cl_lock);
1054
1055 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1056
1057 if (!atomic_dec_and_test(&s->sc_count)) {
1058 wake_up_all(&close_wq);
1059 return;
1060 }
1061
1062 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1063 list_add(&stp->st_locks, reaplist);
1064}
1065
Jeff Layton3c1c9952014-07-29 21:34:39 -04001066static void unhash_lock_stateid(struct nfs4_ol_stateid *stp)
1067{
1068 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
1069
1070 lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);
1071
1072 list_del_init(&stp->st_locks);
Jeff Layton4ae098d2014-07-29 21:34:43 -04001073 unhash_ol_stateid(stp);
Christoph Hellwigcd61c522014-08-14 08:44:57 +02001074 nfs4_unhash_stid(&stp->st_stid);
Jeff Layton3c1c9952014-07-29 21:34:39 -04001075}
1076
Jeff Layton5adfd882014-07-29 21:34:31 -04001077static void release_lock_stateid(struct nfs4_ol_stateid *stp)
Jeff Laytonb49e0842014-07-29 21:34:11 -04001078{
Jeff Layton1c755dc2014-07-29 21:34:12 -04001079 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
1080
1081 spin_lock(&oo->oo_owner.so_client->cl_lock);
Jeff Layton3c1c9952014-07-29 21:34:39 -04001082 unhash_lock_stateid(stp);
Jeff Layton1c755dc2014-07-29 21:34:12 -04001083 spin_unlock(&oo->oo_owner.so_client->cl_lock);
Trond Myklebust60116952014-07-29 21:34:06 -04001084 nfs4_put_stid(&stp->st_stid);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001085}
1086
Trond Myklebustc58c6612014-07-29 21:34:35 -04001087static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001088{
Trond Myklebustd4f04892014-07-29 21:34:36 -04001089 struct nfs4_client *clp = lo->lo_owner.so_client;
Trond Myklebustc58c6612014-07-29 21:34:35 -04001090
Trond Myklebustd4f04892014-07-29 21:34:36 -04001091 lockdep_assert_held(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04001092
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001093 list_del_init(&lo->lo_owner.so_strhash);
1094}
1095
Jeff Layton2c41beb2014-07-29 21:34:41 -04001096/*
1097 * Free a list of generic stateids that were collected earlier after being
1098 * fully unhashed.
1099 */
1100static void
1101free_ol_stateid_reaplist(struct list_head *reaplist)
1102{
1103 struct nfs4_ol_stateid *stp;
Kinglong Meefb94d762014-08-05 21:20:27 +08001104 struct nfs4_file *fp;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001105
1106 might_sleep();
1107
1108 while (!list_empty(reaplist)) {
1109 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1110 st_locks);
1111 list_del(&stp->st_locks);
Kinglong Meefb94d762014-08-05 21:20:27 +08001112 fp = stp->st_stid.sc_file;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001113 stp->st_stid.sc_free(&stp->st_stid);
Kinglong Meefb94d762014-08-05 21:20:27 +08001114 if (fp)
1115 put_nfs4_file(fp);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001116 }
1117}
1118
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001119static void release_lockowner(struct nfs4_lockowner *lo)
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001120{
Trond Myklebustd4f04892014-07-29 21:34:36 -04001121 struct nfs4_client *clp = lo->lo_owner.so_client;
Jeff Layton3c1c9952014-07-29 21:34:39 -04001122 struct nfs4_ol_stateid *stp;
1123 struct list_head reaplist;
1124
1125 INIT_LIST_HEAD(&reaplist);
Trond Myklebustc58c6612014-07-29 21:34:35 -04001126
Trond Myklebustd4f04892014-07-29 21:34:36 -04001127 spin_lock(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04001128 unhash_lockowner_locked(lo);
Jeff Layton3c1c9952014-07-29 21:34:39 -04001129 while (!list_empty(&lo->lo_owner.so_stateids)) {
1130 stp = list_first_entry(&lo->lo_owner.so_stateids,
1131 struct nfs4_ol_stateid, st_perstateowner);
1132 unhash_lock_stateid(stp);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001133 put_ol_stateid_locked(stp, &reaplist);
Jeff Layton3c1c9952014-07-29 21:34:39 -04001134 }
Trond Myklebustd4f04892014-07-29 21:34:36 -04001135 spin_unlock(&clp->cl_lock);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001136 free_ol_stateid_reaplist(&reaplist);
Jeff Layton6b180f02014-07-29 21:34:26 -04001137 nfs4_put_stateowner(&lo->lo_owner);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001138}
1139
Jeff Laytond83017f2014-07-29 21:34:42 -04001140static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1141 struct list_head *reaplist)
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04001142{
1143 struct nfs4_ol_stateid *stp;
1144
1145 while (!list_empty(&open_stp->st_locks)) {
1146 stp = list_entry(open_stp->st_locks.next,
1147 struct nfs4_ol_stateid, st_locks);
Jeff Laytond83017f2014-07-29 21:34:42 -04001148 unhash_lock_stateid(stp);
1149 put_ol_stateid_locked(stp, reaplist);
J. Bruce Fields529d7b22011-03-02 23:48:33 -05001150 }
1151}
1152
Jeff Laytond83017f2014-07-29 21:34:42 -04001153static void unhash_open_stateid(struct nfs4_ol_stateid *stp,
1154 struct list_head *reaplist)
J. Bruce Fields22839632009-01-11 14:27:17 -05001155{
Jeff Layton2c41beb2014-07-29 21:34:41 -04001156 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1157
Jeff Layton4ae098d2014-07-29 21:34:43 -04001158 unhash_ol_stateid(stp);
Jeff Laytond83017f2014-07-29 21:34:42 -04001159 release_open_stateid_locks(stp, reaplist);
J. Bruce Fields38c387b2011-09-16 17:42:48 -04001160}
1161
1162static void release_open_stateid(struct nfs4_ol_stateid *stp)
1163{
Jeff Layton2c41beb2014-07-29 21:34:41 -04001164 LIST_HEAD(reaplist);
1165
1166 spin_lock(&stp->st_stid.sc_client->cl_lock);
Jeff Laytond83017f2014-07-29 21:34:42 -04001167 unhash_open_stateid(stp, &reaplist);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001168 put_ol_stateid_locked(stp, &reaplist);
1169 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1170 free_ol_stateid_reaplist(&reaplist);
J. Bruce Fields22839632009-01-11 14:27:17 -05001171}
1172
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001173static void unhash_openowner_locked(struct nfs4_openowner *oo)
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001174{
Trond Myklebustd4f04892014-07-29 21:34:36 -04001175 struct nfs4_client *clp = oo->oo_owner.so_client;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001176
Trond Myklebustd4f04892014-07-29 21:34:36 -04001177 lockdep_assert_held(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001178
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001179 list_del_init(&oo->oo_owner.so_strhash);
1180 list_del_init(&oo->oo_perclient);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001181}
1182
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001183static void release_last_closed_stateid(struct nfs4_openowner *oo)
1184{
Jeff Layton217526e2014-07-30 08:27:11 -04001185 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1186 nfsd_net_id);
1187 struct nfs4_ol_stateid *s;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001188
Jeff Layton217526e2014-07-30 08:27:11 -04001189 spin_lock(&nn->client_lock);
1190 s = oo->oo_last_closed_stid;
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001191 if (s) {
Jeff Laytond3134b12014-07-29 21:34:32 -04001192 list_del_init(&oo->oo_close_lru);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001193 oo->oo_last_closed_stid = NULL;
1194 }
Jeff Layton217526e2014-07-30 08:27:11 -04001195 spin_unlock(&nn->client_lock);
1196 if (s)
1197 nfs4_put_stid(&s->st_stid);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001198}
1199
Jeff Layton2c41beb2014-07-29 21:34:41 -04001200static void release_openowner(struct nfs4_openowner *oo)
Jeff Layton8f4b54c2014-07-29 21:34:29 -04001201{
1202 struct nfs4_ol_stateid *stp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001203 struct nfs4_client *clp = oo->oo_owner.so_client;
Jeff Layton2c41beb2014-07-29 21:34:41 -04001204 struct list_head reaplist;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001205
Jeff Layton2c41beb2014-07-29 21:34:41 -04001206 INIT_LIST_HEAD(&reaplist);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001207
Trond Myklebustd4f04892014-07-29 21:34:36 -04001208 spin_lock(&clp->cl_lock);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04001209 unhash_openowner_locked(oo);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001210 while (!list_empty(&oo->oo_owner.so_stateids)) {
1211 stp = list_first_entry(&oo->oo_owner.so_stateids,
1212 struct nfs4_ol_stateid, st_perstateowner);
Jeff Laytond83017f2014-07-29 21:34:42 -04001213 unhash_open_stateid(stp, &reaplist);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001214 put_ol_stateid_locked(stp, &reaplist);
1215 }
Trond Myklebustd4f04892014-07-29 21:34:36 -04001216 spin_unlock(&clp->cl_lock);
Jeff Layton2c41beb2014-07-29 21:34:41 -04001217 free_ol_stateid_reaplist(&reaplist);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04001218 release_last_closed_stateid(oo);
Jeff Layton6b180f02014-07-29 21:34:26 -04001219 nfs4_put_stateowner(&oo->oo_owner);
J. Bruce Fieldsf1d110c2009-01-11 14:37:31 -05001220}
1221
Marc Eshel5282fd72009-04-03 08:27:52 +03001222static inline int
1223hash_sessionid(struct nfs4_sessionid *sessionid)
1224{
1225 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1226
1227 return sid->sequence % SESSION_HASH_SIZE;
1228}
1229
Mark Salter135dd002015-04-06 09:46:00 -04001230#ifdef CONFIG_SUNRPC_DEBUG
Marc Eshel5282fd72009-04-03 08:27:52 +03001231static inline void
1232dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1233{
1234 u32 *ptr = (u32 *)(&sessionid->data[0]);
1235 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1236}
Trond Myklebust8f199b82012-03-20 15:11:17 -04001237#else
1238static inline void
1239dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1240{
1241}
1242#endif
1243
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04001244/*
1245 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1246 * won't be used for replay.
1247 */
1248void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1249{
1250 struct nfs4_stateowner *so = cstate->replay_owner;
1251
1252 if (nfserr == nfserr_replay_me)
1253 return;
1254
1255 if (!seqid_mutating_err(ntohl(nfserr))) {
Jeff Layton58fb12e2014-07-29 21:34:27 -04001256 nfsd4_cstate_clear_replay(cstate);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04001257 return;
1258 }
1259 if (!so)
1260 return;
1261 if (so->so_is_open_owner)
1262 release_last_closed_stateid(openowner(so));
1263 so->so_seqid++;
1264 return;
1265}
Marc Eshel5282fd72009-04-03 08:27:52 +03001266
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001267static void
1268gen_sessionid(struct nfsd4_session *ses)
1269{
1270 struct nfs4_client *clp = ses->se_client;
1271 struct nfsd4_sessionid *sid;
1272
1273 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1274 sid->clientid = clp->cl_clientid;
1275 sid->sequence = current_sessionid++;
1276 sid->reserved = 0;
1277}
1278
1279/*
Andy Adamsona6496372009-08-28 08:45:01 -04001280 * The protocol defines ca_maxresponssize_cached to include the size of
1281 * the rpc header, but all we need to cache is the data starting after
1282 * the end of the initial SEQUENCE operation--the rest we regenerate
1283 * each time. Therefore we can advertise a ca_maxresponssize_cached
1284 * value that is the number of bytes in our cache plus a few additional
1285 * bytes. In order to stay on the safe side, and not promise more than
1286 * we can cache, those additional bytes must be the minimum possible: 24
1287 * bytes of rpc header (xid through accept state, with AUTH_NULL
1288 * verifier), 12 for the compound header (with zero-length tag), and 44
1289 * for the SEQUENCE op response:
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001290 */
Andy Adamsona6496372009-08-28 08:45:01 -04001291#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1292
Andy Adamson557ce262009-08-28 08:45:04 -04001293static void
1294free_session_slots(struct nfsd4_session *ses)
1295{
1296 int i;
1297
1298 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
1299 kfree(ses->se_slots[i]);
1300}
1301
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001302/*
1303 * We don't actually need to cache the rpc and session headers, so we
1304 * can allocate a little less for each slot:
1305 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001306static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001307{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001308 u32 size;
J. Bruce Fieldsefe0cb62009-10-24 20:52:16 -04001309
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001310 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1311 size = 0;
1312 else
1313 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1314 return size + sizeof(struct nfsd4_slot);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001315}
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001316
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001317/*
1318 * XXX: If we run out of reserved DRC memory we could (up to a point)
1319 * re-negotiate active sessions and reduce their slot usage to make
Justin P. Mattock42b2aa82011-11-28 20:31:00 -08001320 * room for new connections. For now we just fail the create session.
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001321 */
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001322static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001323{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001324 u32 slotsize = slot_bytes(ca);
1325 u32 num = ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001326 int avail;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001327
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001328 spin_lock(&nfsd_drc_lock);
Zhang Yanfei697ce9b2013-02-22 16:35:47 -08001329 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1330 nfsd_drc_max_mem - nfsd_drc_mem_used);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001331 num = min_t(int, num, avail / slotsize);
1332 nfsd_drc_mem_used += num * slotsize;
1333 spin_unlock(&nfsd_drc_lock);
1334
1335 return num;
1336}
1337
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001338static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001339{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001340 int slotsize = slot_bytes(ca);
1341
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001342 spin_lock(&nfsd_drc_lock);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001343 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001344 spin_unlock(&nfsd_drc_lock);
1345}
1346
Kinglong Mee60810e52014-01-01 00:35:47 +08001347static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1348 struct nfsd4_channel_attrs *battrs)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001349{
Kinglong Mee60810e52014-01-01 00:35:47 +08001350 int numslots = fattrs->maxreqs;
1351 int slotsize = slot_bytes(fattrs);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001352 struct nfsd4_session *new;
1353 int mem, i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001354
J. Bruce Fieldsc23753d2010-09-27 16:22:30 -04001355 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001356 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1357 mem = numslots * sizeof(struct nfsd4_slot *);
Andy Adamson557ce262009-08-28 08:45:04 -04001358
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001359 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001360 if (!new)
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001361 return NULL;
Andy Adamson557ce262009-08-28 08:45:04 -04001362 /* allocate each struct nfsd4_slot and data cache in one piece */
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001363 for (i = 0; i < numslots; i++) {
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001364 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001365 if (!new->se_slots[i])
Andy Adamson557ce262009-08-28 08:45:04 -04001366 goto out_free;
Andy Adamson557ce262009-08-28 08:45:04 -04001367 }
Kinglong Mee60810e52014-01-01 00:35:47 +08001368
1369 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1370 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1371
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001372 return new;
1373out_free:
1374 while (i--)
1375 kfree(new->se_slots[i]);
1376 kfree(new);
1377 return NULL;
1378}
1379
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001380static void free_conn(struct nfsd4_conn *c)
1381{
1382 svc_xprt_put(c->cn_xprt);
1383 kfree(c);
1384}
1385
1386static void nfsd4_conn_lost(struct svc_xpt_user *u)
1387{
1388 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1389 struct nfs4_client *clp = c->cn_session->se_client;
1390
1391 spin_lock(&clp->cl_lock);
1392 if (!list_empty(&c->cn_persession)) {
1393 list_del(&c->cn_persession);
1394 free_conn(c);
1395 }
J. Bruce Fieldseea49802010-11-18 08:34:12 -05001396 nfsd4_probe_callback(clp);
J. Bruce Fields2e4b7232013-03-08 09:30:43 -05001397 spin_unlock(&clp->cl_lock);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001398}
1399
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -04001400static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001401{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001402 struct nfsd4_conn *conn;
1403
1404 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1405 if (!conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001406 return NULL;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001407 svc_xprt_get(rqstp->rq_xprt);
1408 conn->cn_xprt = rqstp->rq_xprt;
J. Bruce Fieldsd29c3742010-06-15 17:34:11 -04001409 conn->cn_flags = flags;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001410 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1411 return conn;
1412}
1413
J. Bruce Fields328ead22010-09-29 16:11:06 -04001414static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1415{
1416 conn->cn_session = ses;
1417 list_add(&conn->cn_persession, &ses->se_conns);
1418}
1419
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001420static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1421{
1422 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001423
1424 spin_lock(&clp->cl_lock);
J. Bruce Fields328ead22010-09-29 16:11:06 -04001425 __nfsd4_hash_conn(conn, ses);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001426 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001427}
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001428
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001429static int nfsd4_register_conn(struct nfsd4_conn *conn)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001430{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001431 conn->cn_xpt_user.callback = nfsd4_conn_lost;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001432 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001433}
1434
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001435static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001436{
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001437 int ret;
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001438
J. Bruce Fieldsdb906812010-09-29 15:29:32 -04001439 nfsd4_hash_conn(conn, ses);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04001440 ret = nfsd4_register_conn(conn);
1441 if (ret)
1442 /* oops; xprt is already down: */
1443 nfsd4_conn_lost(&conn->cn_xpt_user);
J. Bruce Fields57a37142014-07-18 15:06:47 -04001444 /* We may have gained or lost a callback channel: */
1445 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001446}
1447
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001448static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001449{
1450 u32 dir = NFS4_CDFC4_FORE;
1451
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001452 if (cses->flags & SESSION4_BACK_CHAN)
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001453 dir |= NFS4_CDFC4_BACK;
J. Bruce Fieldse1ff3712012-09-11 17:10:25 -04001454 return alloc_conn(rqstp, dir);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001455}
1456
1457/* must be called under client_lock */
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001458static void nfsd4_del_conns(struct nfsd4_session *s)
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001459{
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04001460 struct nfs4_client *clp = s->se_client;
1461 struct nfsd4_conn *c;
1462
1463 spin_lock(&clp->cl_lock);
1464 while (!list_empty(&s->se_conns)) {
1465 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1466 list_del_init(&c->cn_persession);
1467 spin_unlock(&clp->cl_lock);
1468
1469 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1470 free_conn(c);
1471
1472 spin_lock(&clp->cl_lock);
1473 }
1474 spin_unlock(&clp->cl_lock);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001475}
1476
J. Bruce Fields1377b692012-09-11 21:42:40 -04001477static void __free_session(struct nfsd4_session *ses)
1478{
J. Bruce Fields1377b692012-09-11 21:42:40 -04001479 free_session_slots(ses);
1480 kfree(ses);
1481}
1482
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001483static void free_session(struct nfsd4_session *ses)
Benny Halevy508dc6e2012-02-23 17:40:52 -08001484{
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001485 nfsd4_del_conns(ses);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04001486 nfsd4_put_drc_mem(&ses->se_fchannel);
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001487 __free_session(ses);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001488}
Andy Adamson557ce262009-08-28 08:45:04 -04001489
Fengguang Wu135ae822012-11-10 07:20:25 -05001490static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001491{
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001492 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001493 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsa827bcb2012-09-12 09:51:34 -04001494
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001495 new->se_client = clp;
1496 gen_sessionid(new);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001497
J. Bruce Fieldsc7662512010-06-06 18:12:14 -04001498 INIT_LIST_HEAD(&new->se_conns);
1499
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04001500 new->se_cb_seq_nr = 1;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001501 new->se_flags = cses->flags;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -04001502 new->se_cb_prog = cses->callback_prog;
J. Bruce Fieldsc6bb3ca2012-11-01 16:31:02 -04001503 new->se_cb_sec = cses->cb_sec;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001504 atomic_set(&new->se_ref, 0);
J. Bruce Fields5b6feee2010-09-27 17:12:05 -04001505 idx = hash_sessionid(&new->se_sessionid);
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001506 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001507 spin_lock(&clp->cl_lock);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001508 list_add(&new->se_perclnt, &clp->cl_sessions);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001509 spin_unlock(&clp->cl_lock);
Kinglong Mee60810e52014-01-01 00:35:47 +08001510
Chuck Leverb0d2e422014-08-22 15:10:59 -04001511 {
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001512 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fieldsdcbeaa62010-06-15 17:25:45 -04001513 /*
1514 * This is a little silly; with sessions there's no real
1515 * use for the callback address. Use the peer address
1516 * as a reasonable default for now, but consider fixing
1517 * the rpc client not to require an address in the
1518 * future:
1519 */
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001520 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1521 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001522 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001523}
1524
Benny Halevy9089f1b2010-05-12 00:12:26 +03001525/* caller must hold client_lock */
Marc Eshel5282fd72009-04-03 08:27:52 +03001526static struct nfsd4_session *
Trond Myklebustd4e19e702014-06-30 11:48:42 -04001527__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
Marc Eshel5282fd72009-04-03 08:27:52 +03001528{
1529 struct nfsd4_session *elem;
1530 int idx;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001531 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Marc Eshel5282fd72009-04-03 08:27:52 +03001532
Trond Myklebust0a880a22014-07-30 08:27:10 -04001533 lockdep_assert_held(&nn->client_lock);
1534
Marc Eshel5282fd72009-04-03 08:27:52 +03001535 dump_sessionid(__func__, sessionid);
1536 idx = hash_sessionid(sessionid);
Marc Eshel5282fd72009-04-03 08:27:52 +03001537 /* Search in the appropriate list */
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03001538 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
Marc Eshel5282fd72009-04-03 08:27:52 +03001539 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1540 NFS4_MAX_SESSIONID_LEN)) {
1541 return elem;
1542 }
1543 }
1544
1545 dprintk("%s: session not found\n", __func__);
1546 return NULL;
1547}
1548
Trond Myklebustd4e19e702014-06-30 11:48:42 -04001549static struct nfsd4_session *
1550find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1551 __be32 *ret)
1552{
1553 struct nfsd4_session *session;
1554 __be32 status = nfserr_badsession;
1555
1556 session = __find_in_sessionid_hashtbl(sessionid, net);
1557 if (!session)
1558 goto out;
1559 status = nfsd4_get_session_locked(session);
1560 if (status)
1561 session = NULL;
1562out:
1563 *ret = status;
1564 return session;
1565}
1566
Benny Halevy9089f1b2010-05-12 00:12:26 +03001567/* caller must hold client_lock */
Andy Adamson7116ed62009-04-03 08:27:43 +03001568static void
Marc Eshel5282fd72009-04-03 08:27:52 +03001569unhash_session(struct nfsd4_session *ses)
Andy Adamson7116ed62009-04-03 08:27:43 +03001570{
Trond Myklebust0a880a22014-07-30 08:27:10 -04001571 struct nfs4_client *clp = ses->se_client;
1572 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1573
1574 lockdep_assert_held(&nn->client_lock);
1575
Andy Adamson7116ed62009-04-03 08:27:43 +03001576 list_del(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001577 spin_lock(&ses->se_client->cl_lock);
Andy Adamson7116ed62009-04-03 08:27:43 +03001578 list_del(&ses->se_perclnt);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001579 spin_unlock(&ses->se_client->cl_lock);
Marc Eshel5282fd72009-04-03 08:27:52 +03001580}
1581
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1583static int
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001584STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585{
J. Bruce Fieldsbbc7f332015-01-20 11:51:26 -05001586 /*
1587 * We're assuming the clid was not given out from a boot
1588 * precisely 2^32 (about 136 years) before this one. That seems
1589 * a safe assumption:
1590 */
1591 if (clid->cl_boot == (u32)nn->boot_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 return 0;
Andy Adamson60adfc52009-04-03 08:28:50 +03001593 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04001594 clid->cl_boot, clid->cl_id, nn->boot_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 return 1;
1596}
1597
1598/*
1599 * XXX Should we use a slab cache ?
1600 * This type of memory management is somewhat inefficient, but we use it
1601 * anyway since SETCLIENTID is not a common operation.
1602 */
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001603static struct nfs4_client *alloc_client(struct xdr_netobj name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604{
1605 struct nfs4_client *clp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001606 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001608 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1609 if (clp == NULL)
1610 return NULL;
Thomas Meyer67114fe2011-11-17 23:43:40 +01001611 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
Trond Myklebustd4f04892014-07-29 21:34:36 -04001612 if (clp->cl_name.data == NULL)
1613 goto err_no_name;
1614 clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
1615 OWNER_HASH_SIZE, GFP_KERNEL);
1616 if (!clp->cl_ownerstr_hashtbl)
1617 goto err_no_hashtbl;
1618 for (i = 0; i < OWNER_HASH_SIZE; i++)
1619 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001620 clp->cl_name.len = name.len;
Trond Myklebust5694c932014-04-18 14:43:56 -04001621 INIT_LIST_HEAD(&clp->cl_sessions);
1622 idr_init(&clp->cl_stateids);
1623 atomic_set(&clp->cl_refcount, 0);
1624 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1625 INIT_LIST_HEAD(&clp->cl_idhash);
1626 INIT_LIST_HEAD(&clp->cl_openowners);
1627 INIT_LIST_HEAD(&clp->cl_delegations);
1628 INIT_LIST_HEAD(&clp->cl_lru);
Trond Myklebust5694c932014-04-18 14:43:56 -04001629 INIT_LIST_HEAD(&clp->cl_revoked);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001630#ifdef CONFIG_NFSD_PNFS
1631 INIT_LIST_HEAD(&clp->cl_lo_states);
1632#endif
Trond Myklebust5694c932014-04-18 14:43:56 -04001633 spin_lock_init(&clp->cl_lock);
1634 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 return clp;
Trond Myklebustd4f04892014-07-29 21:34:36 -04001636err_no_hashtbl:
1637 kfree(clp->cl_name.data);
1638err_no_name:
1639 kfree(clp);
1640 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641}
1642
Trond Myklebust4dd86e152014-04-18 14:43:58 -04001643static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644free_client(struct nfs4_client *clp)
1645{
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001646 while (!list_empty(&clp->cl_sessions)) {
1647 struct nfsd4_session *ses;
1648 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1649 se_perclnt);
1650 list_del(&ses->se_perclnt);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04001651 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1652 free_session(ses);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001653 }
Trond Myklebust4cb57e32014-04-18 14:43:57 -04001654 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001655 free_svc_cred(&clp->cl_cred);
Trond Myklebustd4f04892014-07-29 21:34:36 -04001656 kfree(clp->cl_ownerstr_hashtbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 kfree(clp->cl_name.data);
majianpeng2d32b292013-01-29 13:16:06 +08001658 idr_destroy(&clp->cl_stateids);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 kfree(clp);
1660}
1661
Benny Halevy84d38ac2010-05-12 00:13:16 +03001662/* must be called under the client_lock */
Trond Myklebust4beb3452014-07-30 08:27:02 -04001663static void
Benny Halevy84d38ac2010-05-12 00:13:16 +03001664unhash_client_locked(struct nfs4_client *clp)
1665{
Trond Myklebust4beb3452014-07-30 08:27:02 -04001666 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001667 struct nfsd4_session *ses;
1668
Trond Myklebust0a880a22014-07-30 08:27:10 -04001669 lockdep_assert_held(&nn->client_lock);
1670
Trond Myklebust4beb3452014-07-30 08:27:02 -04001671 /* Mark the client as expired! */
1672 clp->cl_time = 0;
1673 /* Make it invisible */
1674 if (!list_empty(&clp->cl_idhash)) {
1675 list_del_init(&clp->cl_idhash);
1676 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1677 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1678 else
1679 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1680 }
1681 list_del_init(&clp->cl_lru);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001682 spin_lock(&clp->cl_lock);
J. Bruce Fields792c95d2010-10-12 19:55:25 -04001683 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1684 list_del_init(&ses->se_hash);
J. Bruce Fields4c649372010-06-15 14:22:37 -04001685 spin_unlock(&clp->cl_lock);
Benny Halevy84d38ac2010-05-12 00:13:16 +03001686}
1687
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688static void
Trond Myklebust4beb3452014-07-30 08:27:02 -04001689unhash_client(struct nfs4_client *clp)
1690{
1691 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1692
1693 spin_lock(&nn->client_lock);
1694 unhash_client_locked(clp);
1695 spin_unlock(&nn->client_lock);
1696}
1697
Jeff Layton97403d92014-07-30 08:27:12 -04001698static __be32 mark_client_expired_locked(struct nfs4_client *clp)
1699{
1700 if (atomic_read(&clp->cl_refcount))
1701 return nfserr_jukebox;
1702 unhash_client_locked(clp);
1703 return nfs_ok;
1704}
1705
Trond Myklebust4beb3452014-07-30 08:27:02 -04001706static void
1707__destroy_client(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001709 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 struct nfs4_delegation *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 struct list_head reaplist;
1712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04001714 spin_lock(&state_lock);
NeilBrownea1da632005-06-23 22:04:17 -07001715 while (!list_empty(&clp->cl_delegations)) {
1716 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
Jeff Layton42690672014-07-25 07:34:20 -04001717 unhash_delegation_locked(dp);
1718 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 }
Benny Halevycdc97502014-05-30 09:09:30 -04001720 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 while (!list_empty(&reaplist)) {
1722 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
Jeff Layton42690672014-07-25 07:34:20 -04001723 list_del_init(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +02001724 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -04001725 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
Trond Myklebust60116952014-07-29 21:34:06 -04001726 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 }
Jeff Layton2d4a5322014-07-25 07:34:21 -04001728 while (!list_empty(&clp->cl_revoked)) {
Andrew Elblec8764862015-02-25 17:46:27 -05001729 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
Jeff Layton2d4a5322014-07-25 07:34:21 -04001730 list_del_init(&dp->dl_recall_lru);
Trond Myklebust60116952014-07-29 21:34:06 -04001731 nfs4_put_stid(&dp->dl_stid);
Benny Halevy956c4fe2013-10-29 11:39:12 +02001732 }
NeilBrownea1da632005-06-23 22:04:17 -07001733 while (!list_empty(&clp->cl_openowners)) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001734 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
Kinglong Meeb5971af2014-08-22 10:18:43 -04001735 nfs4_get_stateowner(&oo->oo_owner);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04001736 release_openowner(oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001738 nfsd4_return_all_client_layouts(clp);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -04001739 nfsd4_shutdown_callback(clp);
J. Bruce Fields2bf23872010-03-08 12:37:27 -05001740 if (clp->cl_cb_conn.cb_xprt)
1741 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
J. Bruce Fields221a6872013-04-01 22:23:49 -04001742 free_client(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743}
1744
Trond Myklebust4beb3452014-07-30 08:27:02 -04001745static void
1746destroy_client(struct nfs4_client *clp)
1747{
1748 unhash_client(clp);
1749 __destroy_client(clp);
1750}
1751
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001752static void expire_client(struct nfs4_client *clp)
1753{
Trond Myklebust4beb3452014-07-30 08:27:02 -04001754 unhash_client(clp);
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001755 nfsd4_client_record_remove(clp);
Trond Myklebust4beb3452014-07-30 08:27:02 -04001756 __destroy_client(clp);
J. Bruce Fields0d22f682012-09-26 11:36:16 -04001757}
1758
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001759static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1760{
1761 memcpy(target->cl_verifier.data, source->data,
1762 sizeof(target->cl_verifier.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763}
1764
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001765static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1766{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1768 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1769}
1770
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001771static int copy_cred(struct svc_cred *target, struct svc_cred *source)
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001772{
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001773 if (source->cr_principal) {
1774 target->cr_principal =
1775 kstrdup(source->cr_principal, GFP_KERNEL);
1776 if (target->cr_principal == NULL)
1777 return -ENOMEM;
1778 } else
1779 target->cr_principal = NULL;
J. Bruce Fieldsd5497fc2012-05-14 22:06:49 -04001780 target->cr_flavor = source->cr_flavor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 target->cr_uid = source->cr_uid;
1782 target->cr_gid = source->cr_gid;
1783 target->cr_group_info = source->cr_group_info;
1784 get_group_info(target->cr_group_info);
J. Bruce Fields0dc15312013-05-14 16:07:13 -04001785 target->cr_gss_mech = source->cr_gss_mech;
1786 if (source->cr_gss_mech)
1787 gss_mech_get(source->cr_gss_mech);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001788 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789}
1790
Rasmus Villemoesef17af22014-12-05 16:40:07 +01001791static int
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001792compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1793{
Rasmus Villemoesef17af22014-12-05 16:40:07 +01001794 if (o1->len < o2->len)
1795 return -1;
1796 if (o1->len > o2->len)
1797 return 1;
1798 return memcmp(o1->data, o2->data, o1->len);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001799}
1800
J. Bruce Fields35bba9a2007-11-21 22:07:08 -05001801static int same_name(const char *n1, const char *n2)
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001802{
NeilBrowna55370a2005-06-23 22:03:52 -07001803 return 0 == memcmp(n1, n2, HEXDIR_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804}
1805
1806static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001807same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1808{
1809 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810}
1811
1812static int
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001813same_clid(clientid_t *cl1, clientid_t *cl2)
1814{
1815 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816}
1817
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001818static bool groups_equal(struct group_info *g1, struct group_info *g2)
1819{
1820 int i;
1821
1822 if (g1->ngroups != g2->ngroups)
1823 return false;
1824 for (i=0; i<g1->ngroups; i++)
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001825 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001826 return false;
1827 return true;
1828}
1829
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001830/*
1831 * RFC 3530 language requires clid_inuse be returned when the
1832 * "principal" associated with a requests differs from that previously
1833 * used. We use uid, gid's, and gss principal string as our best
1834 * approximation. We also don't want to allow non-gss use of a client
1835 * established using gss: in theory cr_principal should catch that
1836 * change, but in practice cr_principal can be null even in the gss case
1837 * since gssd doesn't always pass down a principal string.
1838 */
1839static bool is_gss_cred(struct svc_cred *cr)
1840{
1841 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1842 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1843}
1844
1845
Vivek Trivedi5559b502012-07-24 21:18:20 +05301846static bool
J. Bruce Fields599e0a22007-07-26 17:04:54 -04001847same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1848{
J. Bruce Fields68eb3502012-08-21 12:48:30 -04001849 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
Eric W. Biederman6fab8772013-02-02 06:53:11 -08001850 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1851 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
J. Bruce Fields8fbba962012-05-14 21:20:54 -04001852 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1853 return false;
1854 if (cr1->cr_principal == cr2->cr_principal)
1855 return true;
1856 if (!cr1->cr_principal || !cr2->cr_principal)
1857 return false;
Vivek Trivedi5559b502012-07-24 21:18:20 +05301858 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859}
1860
J. Bruce Fields57266a62013-04-13 14:27:29 -04001861static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1862{
1863 struct svc_cred *cr = &rqstp->rq_cred;
1864 u32 service;
1865
J. Bruce Fieldsc4720592013-08-07 11:41:49 -04001866 if (!cr->cr_gss_mech)
1867 return false;
J. Bruce Fields57266a62013-04-13 14:27:29 -04001868 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1869 return service == RPC_GSS_SVC_INTEGRITY ||
1870 service == RPC_GSS_SVC_PRIVACY;
1871}
1872
1873static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1874{
1875 struct svc_cred *cr = &rqstp->rq_cred;
1876
1877 if (!cl->cl_mach_cred)
1878 return true;
1879 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1880 return false;
1881 if (!svc_rqst_integrity_protected(rqstp))
1882 return false;
1883 if (!cr->cr_principal)
1884 return false;
1885 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1886}
1887
Jeff Layton294ac322014-07-30 08:27:15 -04001888static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
J. Bruce Fieldsdeda2fa2007-11-19 20:31:04 -05001889{
Chuck Leverab4684d2012-03-02 17:13:50 -05001890 __be32 verf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891
Jeff Laytonf4199922014-06-17 07:44:11 -04001892 /*
1893 * This is opaque to client, so no need to byte-swap. Use
1894 * __force to keep sparse happy
1895 */
1896 verf[0] = (__force __be32)get_seconds();
Jeff Layton294ac322014-07-30 08:27:15 -04001897 verf[1] = (__force __be32)nn->clientid_counter;
Chuck Leverab4684d2012-03-02 17:13:50 -05001898 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899}
1900
Jeff Layton294ac322014-07-30 08:27:15 -04001901static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
1902{
1903 clp->cl_clientid.cl_boot = nn->boot_time;
1904 clp->cl_clientid.cl_id = nn->clientid_counter++;
1905 gen_confirm(clp, nn);
1906}
1907
Jeff Layton4770d722014-07-29 21:34:10 -04001908static struct nfs4_stid *
1909find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
J. Bruce Fields4581d142011-09-06 14:56:09 -04001910{
J. Bruce Fields3abdb602013-02-03 12:23:01 -05001911 struct nfs4_stid *ret;
1912
1913 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1914 if (!ret || !ret->sc_type)
1915 return NULL;
1916 return ret;
J. Bruce Fields4d71ab82011-09-06 16:48:57 -04001917}
1918
Jeff Layton4770d722014-07-29 21:34:10 -04001919static struct nfs4_stid *
Jeff Layton4770d722014-07-29 21:34:10 -04001920find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04001921{
1922 struct nfs4_stid *s;
1923
Jeff Layton4770d722014-07-29 21:34:10 -04001924 spin_lock(&cl->cl_lock);
1925 s = find_stateid_locked(cl, t);
Trond Myklebust2d3f9662014-07-29 21:34:25 -04001926 if (s != NULL) {
1927 if (typemask & s->sc_type)
1928 atomic_inc(&s->sc_count);
1929 else
1930 s = NULL;
1931 }
Jeff Layton4770d722014-07-29 21:34:10 -04001932 spin_unlock(&cl->cl_lock);
1933 return s;
J. Bruce Fields4581d142011-09-06 14:56:09 -04001934}
1935
Jeff Layton2216d442012-11-12 15:00:57 -05001936static struct nfs4_client *create_client(struct xdr_netobj name,
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001937 struct svc_rqst *rqstp, nfs4_verifier *verf)
1938{
1939 struct nfs4_client *clp;
1940 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001941 int ret;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001942 struct net *net = SVC_NET(rqstp);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001943
1944 clp = alloc_client(name);
1945 if (clp == NULL)
1946 return NULL;
1947
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001948 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1949 if (ret) {
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001950 free_client(clp);
J. Bruce Fields03a4e1f2012-05-14 19:55:22 -04001951 return NULL;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001952 }
Christoph Hellwig0162ac22014-09-24 12:19:19 +02001953 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
Benny Halevy07cd4902010-05-12 00:13:41 +03001954 clp->cl_time = get_seconds();
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001955 clear_bit(0, &clp->cl_cb_slot_busy);
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001956 copy_verf(clp, verf);
1957 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
J. Bruce Fieldsedd76782010-06-14 22:26:31 -04001958 clp->cl_cb_session = NULL;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03001959 clp->net = net;
Ricardo Labiagab09333c2009-09-10 12:27:34 +03001960 return clp;
1961}
1962
NeilBrownfd39ca92005-06-23 22:04:03 -07001963static void
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001964add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1965{
1966 struct rb_node **new = &(root->rb_node), *parent = NULL;
1967 struct nfs4_client *clp;
1968
1969 while (*new) {
1970 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1971 parent = *new;
1972
1973 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1974 new = &((*new)->rb_left);
1975 else
1976 new = &((*new)->rb_right);
1977 }
1978
1979 rb_link_node(&new_clp->cl_namenode, parent, new);
1980 rb_insert_color(&new_clp->cl_namenode, root);
1981}
1982
1983static struct nfs4_client *
1984find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1985{
Rasmus Villemoesef17af22014-12-05 16:40:07 +01001986 int cmp;
Jeff Laytonac55fdc2012-11-12 15:00:56 -05001987 struct rb_node *node = root->rb_node;
1988 struct nfs4_client *clp;
1989
1990 while (node) {
1991 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1992 cmp = compare_blob(&clp->cl_name, name);
1993 if (cmp > 0)
1994 node = node->rb_left;
1995 else if (cmp < 0)
1996 node = node->rb_right;
1997 else
1998 return clp;
1999 }
2000 return NULL;
2001}
2002
2003static void
2004add_to_unconfirmed(struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005{
2006 unsigned int idhashval;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002007 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008
Trond Myklebust0a880a22014-07-30 08:27:10 -04002009 lockdep_assert_held(&nn->client_lock);
2010
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002011 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002012 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002014 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002015 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016}
2017
NeilBrownfd39ca92005-06-23 22:04:03 -07002018static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019move_to_confirmed(struct nfs4_client *clp)
2020{
2021 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002022 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023
Trond Myklebust0a880a22014-07-30 08:27:10 -04002024 lockdep_assert_held(&nn->client_lock);
2025
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002027 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002028 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002029 add_clp_to_name_tree(clp, &nn->conf_name_tree);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002030 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002031 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032}
2033
2034static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002035find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036{
2037 struct nfs4_client *clp;
2038 unsigned int idhashval = clientid_hashval(clid->cl_id);
2039
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002040 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002041 if (same_clid(&clp->cl_clientid, clid)) {
J. Bruce Fieldsd15c0772012-09-13 16:19:31 -04002042 if ((bool)clp->cl_minorversion != sessions)
2043 return NULL;
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002044 renew_client_locked(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 return clp;
J. Bruce Fieldsa50d2ad2011-10-12 16:24:27 -04002046 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 }
2048 return NULL;
2049}
2050
2051static struct nfs4_client *
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002052find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2053{
2054 struct list_head *tbl = nn->conf_id_hashtbl;
2055
Trond Myklebust0a880a22014-07-30 08:27:10 -04002056 lockdep_assert_held(&nn->client_lock);
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002057 return find_client_in_id_table(tbl, clid, sessions);
2058}
2059
2060static struct nfs4_client *
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002061find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062{
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002063 struct list_head *tbl = nn->unconf_id_hashtbl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
Trond Myklebust0a880a22014-07-30 08:27:10 -04002065 lockdep_assert_held(&nn->client_lock);
J. Bruce Fieldsbfa85e832013-03-14 18:24:52 -04002066 return find_client_in_id_table(tbl, clid, sessions);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067}
2068
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05002069static bool clp_used_exchangeid(struct nfs4_client *clp)
Andy Adamsona1bcecd2009-04-03 08:28:05 +03002070{
J. Bruce Fields6e5f15c2010-11-24 17:17:34 -05002071 return clp->cl_exchange_flags != 0;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05002072}
Andy Adamsona1bcecd2009-04-03 08:28:05 +03002073
NeilBrown28ce6052005-06-23 22:03:56 -07002074static struct nfs4_client *
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002075find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07002076{
Trond Myklebust0a880a22014-07-30 08:27:10 -04002077 lockdep_assert_held(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002078 return find_clp_in_name_tree(name, &nn->conf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07002079}
2080
2081static struct nfs4_client *
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002082find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
NeilBrown28ce6052005-06-23 22:03:56 -07002083{
Trond Myklebust0a880a22014-07-30 08:27:10 -04002084 lockdep_assert_held(&nn->client_lock);
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002085 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
NeilBrown28ce6052005-06-23 22:03:56 -07002086}
2087
NeilBrownfd39ca92005-06-23 22:04:03 -07002088static void
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002089gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090{
J. Bruce Fields07263f12010-05-31 19:09:40 -04002091 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09002092 struct sockaddr *sa = svc_addr(rqstp);
2093 u32 scopeid = rpc_get_scope_id(sa);
Jeff Layton7077ecb2009-08-14 12:57:58 -04002094 unsigned short expected_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095
Jeff Layton7077ecb2009-08-14 12:57:58 -04002096 /* Currently, we only support tcp and tcp6 for the callback channel */
2097 if (se->se_callback_netid_len == 3 &&
2098 !memcmp(se->se_callback_netid_val, "tcp", 3))
2099 expected_family = AF_INET;
2100 else if (se->se_callback_netid_len == 4 &&
2101 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2102 expected_family = AF_INET6;
2103 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 goto out_err;
2105
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002106 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002107 se->se_callback_addr_len,
J. Bruce Fields07263f12010-05-31 19:09:40 -04002108 (struct sockaddr *)&conn->cb_addr,
2109 sizeof(conn->cb_addr));
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002110
J. Bruce Fields07263f12010-05-31 19:09:40 -04002111 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 goto out_err;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -04002113
J. Bruce Fields07263f12010-05-31 19:09:40 -04002114 if (conn->cb_addr.ss_family == AF_INET6)
2115 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
Jeff Laytonfbf46652009-08-14 12:57:59 -04002116
J. Bruce Fields07263f12010-05-31 19:09:40 -04002117 conn->cb_prog = se->se_callback_prog;
2118 conn->cb_ident = se->se_callback_ident;
Mi Jinlong849a1cf2011-08-30 17:18:41 +08002119 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 return;
2121out_err:
J. Bruce Fields07263f12010-05-31 19:09:40 -04002122 conn->cb_addr.ss_family = AF_UNSPEC;
2123 conn->cb_addrlen = 0;
Neil Brown849823c2005-09-13 01:25:36 -07002124 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 "will not receive delegations\n",
2126 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
2127
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 return;
2129}
2130
Andy Adamson074fe892009-04-03 08:28:15 +03002131/*
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04002132 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
Andy Adamson074fe892009-04-03 08:28:15 +03002133 */
Trond Myklebustb6076642014-06-30 11:48:35 -04002134static void
Andy Adamson074fe892009-04-03 08:28:15 +03002135nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2136{
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002137 struct xdr_buf *buf = resp->xdr.buf;
Andy Adamson557ce262009-08-28 08:45:04 -04002138 struct nfsd4_slot *slot = resp->cstate.slot;
2139 unsigned int base;
Andy Adamson074fe892009-04-03 08:28:15 +03002140
Andy Adamson557ce262009-08-28 08:45:04 -04002141 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03002142
Andy Adamson557ce262009-08-28 08:45:04 -04002143 slot->sl_opcnt = resp->opcnt;
2144 slot->sl_status = resp->cstate.status;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002145
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002146 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002147 if (nfsd4_not_cached(resp)) {
Andy Adamson557ce262009-08-28 08:45:04 -04002148 slot->sl_datalen = 0;
Andy Adamsonbf864a32009-04-03 08:28:35 +03002149 return;
2150 }
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002151 base = resp->cstate.data_offset;
2152 slot->sl_datalen = buf->len - base;
2153 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
Andy Adamson557ce262009-08-28 08:45:04 -04002154 WARN("%s: sessions DRC could not cache compound\n", __func__);
2155 return;
Andy Adamson074fe892009-04-03 08:28:15 +03002156}
2157
2158/*
Andy Adamsonabfabf82009-07-23 19:02:18 -04002159 * Encode the replay sequence operation from the slot values.
2160 * If cachethis is FALSE encode the uncached rep error on the next
2161 * operation which sets resp->p and increments resp->opcnt for
2162 * nfs4svc_encode_compoundres.
2163 *
Andy Adamson074fe892009-04-03 08:28:15 +03002164 */
Andy Adamsonabfabf82009-07-23 19:02:18 -04002165static __be32
2166nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2167 struct nfsd4_compoundres *resp)
Andy Adamson074fe892009-04-03 08:28:15 +03002168{
Andy Adamsonabfabf82009-07-23 19:02:18 -04002169 struct nfsd4_op *op;
2170 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson074fe892009-04-03 08:28:15 +03002171
Andy Adamsonabfabf82009-07-23 19:02:18 -04002172 /* Encode the replayed sequence operation */
2173 op = &args->ops[resp->opcnt - 1];
2174 nfsd4_encode_operation(resp, op);
2175
2176 /* Return nfserr_retry_uncached_rep in next operation. */
J. Bruce Fields73e79482012-02-13 16:39:00 -05002177 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
Andy Adamsonabfabf82009-07-23 19:02:18 -04002178 op = &args->ops[resp->opcnt++];
2179 op->status = nfserr_retry_uncached_rep;
2180 nfsd4_encode_operation(resp, op);
Andy Adamson074fe892009-04-03 08:28:15 +03002181 }
Andy Adamsonabfabf82009-07-23 19:02:18 -04002182 return op->status;
Andy Adamson074fe892009-04-03 08:28:15 +03002183}
2184
2185/*
Andy Adamson557ce262009-08-28 08:45:04 -04002186 * The sequence operation is not cached because we can use the slot and
2187 * session values.
Andy Adamson074fe892009-04-03 08:28:15 +03002188 */
J. Bruce Fields3ca2eb92014-03-21 12:04:21 -04002189static __be32
Andy Adamsonbf864a32009-04-03 08:28:35 +03002190nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
2191 struct nfsd4_sequence *seq)
Andy Adamson074fe892009-04-03 08:28:15 +03002192{
Andy Adamson557ce262009-08-28 08:45:04 -04002193 struct nfsd4_slot *slot = resp->cstate.slot;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002194 struct xdr_stream *xdr = &resp->xdr;
2195 __be32 *p;
Andy Adamson074fe892009-04-03 08:28:15 +03002196 __be32 status;
2197
Andy Adamson557ce262009-08-28 08:45:04 -04002198 dprintk("--> %s slot %p\n", __func__, slot);
Andy Adamson074fe892009-04-03 08:28:15 +03002199
Andy Adamsonabfabf82009-07-23 19:02:18 -04002200 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
J. Bruce Fields0da7b192014-03-21 11:43:34 -04002201 if (status)
Andy Adamsonabfabf82009-07-23 19:02:18 -04002202 return status;
Andy Adamson074fe892009-04-03 08:28:15 +03002203
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002204 p = xdr_reserve_space(xdr, slot->sl_datalen);
2205 if (!p) {
2206 WARN_ON_ONCE(1);
2207 return nfserr_serverfault;
2208 }
2209 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
2210 xdr_commit_encode(xdr);
Andy Adamson074fe892009-04-03 08:28:15 +03002211
Andy Adamson557ce262009-08-28 08:45:04 -04002212 resp->opcnt = slot->sl_opcnt;
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04002213 return slot->sl_status;
Andy Adamson074fe892009-04-03 08:28:15 +03002214}
2215
Andy Adamson0733d212009-04-03 08:28:01 +03002216/*
2217 * Set the exchange_id flags returned by the server.
2218 */
2219static void
2220nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
2221{
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002222#ifdef CONFIG_NFSD_PNFS
2223 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
2224#else
Andy Adamson0733d212009-04-03 08:28:01 +03002225 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002226#endif
Andy Adamson0733d212009-04-03 08:28:01 +03002227
2228 /* Referrals are supported, Migration is not. */
2229 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
2230
2231 /* set the wire flags to return to client. */
2232 clid->flags = new->cl_exchange_flags;
2233}
2234
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002235static bool client_has_state(struct nfs4_client *clp)
2236{
2237 /*
2238 * Note clp->cl_openowners check isn't quite right: there's no
2239 * need to count owners without stateid's.
2240 *
2241 * Also note we should probably be using this in 4.0 case too.
2242 */
J. Bruce Fields6eccece2012-05-29 16:37:44 -04002243 return !list_empty(&clp->cl_openowners)
2244 || !list_empty(&clp->cl_delegations)
2245 || !list_empty(&clp->cl_sessions);
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002246}
2247
Al Virob37ad282006-10-19 23:28:59 -07002248__be32
Andy Adamson069b6ad2009-04-03 08:27:58 +03002249nfsd4_exchange_id(struct svc_rqst *rqstp,
2250 struct nfsd4_compound_state *cstate,
2251 struct nfsd4_exchange_id *exid)
2252{
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002253 struct nfs4_client *conf, *new;
2254 struct nfs4_client *unconf = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002255 __be32 status;
Jeff Layton363168b2009-08-14 12:57:56 -04002256 char addr_str[INET6_ADDRSTRLEN];
Andy Adamson0733d212009-04-03 08:28:01 +03002257 nfs4_verifier verf = exid->verifier;
Jeff Layton363168b2009-08-14 12:57:56 -04002258 struct sockaddr *sa = svc_addr(rqstp);
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04002259 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002260 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamson0733d212009-04-03 08:28:01 +03002261
Jeff Layton363168b2009-08-14 12:57:56 -04002262 rpc_ntop(sa, addr_str, sizeof(addr_str));
Andy Adamson0733d212009-04-03 08:28:01 +03002263 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
Jeff Layton363168b2009-08-14 12:57:56 -04002264 "ip_addr=%s flags %x, spa_how %d\n",
Andy Adamson0733d212009-04-03 08:28:01 +03002265 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
Jeff Layton363168b2009-08-14 12:57:56 -04002266 addr_str, exid->flags, exid->spa_how);
Andy Adamson0733d212009-04-03 08:28:01 +03002267
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04002268 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
Andy Adamson0733d212009-04-03 08:28:01 +03002269 return nfserr_inval;
2270
Andy Adamson0733d212009-04-03 08:28:01 +03002271 switch (exid->spa_how) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04002272 case SP4_MACH_CRED:
2273 if (!svc_rqst_integrity_protected(rqstp))
2274 return nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03002275 case SP4_NONE:
2276 break;
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05002277 default: /* checked by xdr code */
2278 WARN_ON_ONCE(1);
Andy Adamson0733d212009-04-03 08:28:01 +03002279 case SP4_SSV:
J. Bruce Fieldsdd303332013-04-12 18:10:56 -04002280 return nfserr_encr_alg_unsupp;
Andy Adamson0733d212009-04-03 08:28:01 +03002281 }
2282
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002283 new = create_client(exid->clname, rqstp, &verf);
2284 if (new == NULL)
2285 return nfserr_jukebox;
2286
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002287 /* Cases below refer to rfc 5661 section 18.35.4: */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002288 spin_lock(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002289 conf = find_confirmed_client_by_name(&exid->clname, nn);
Andy Adamson0733d212009-04-03 08:28:01 +03002290 if (conf) {
J. Bruce Fields83e08fd2012-05-14 09:08:10 -04002291 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
2292 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
2293
J. Bruce Fields136e6582012-05-12 20:37:23 -04002294 if (update) {
2295 if (!clp_used_exchangeid(conf)) { /* buggy client */
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002296 status = nfserr_inval;
Andy Adamson0733d212009-04-03 08:28:01 +03002297 goto out;
2298 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002299 if (!mach_creds_match(conf, rqstp)) {
2300 status = nfserr_wrong_cred;
2301 goto out;
2302 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002303 if (!creds_match) { /* case 9 */
Andy Adamson0733d212009-04-03 08:28:01 +03002304 status = nfserr_perm;
2305 goto out;
2306 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002307 if (!verfs_match) { /* case 8 */
Andy Adamson0733d212009-04-03 08:28:01 +03002308 status = nfserr_not_same;
2309 goto out;
2310 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002311 /* case 6 */
2312 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002313 goto out_copy;
Andy Adamson0733d212009-04-03 08:28:01 +03002314 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002315 if (!creds_match) { /* case 3 */
J. Bruce Fields631fc9e2012-05-14 15:57:23 -04002316 if (client_has_state(conf)) {
2317 status = nfserr_clid_inuse;
2318 goto out;
2319 }
Andy Adamson0733d212009-04-03 08:28:01 +03002320 goto out_new;
2321 }
J. Bruce Fields136e6582012-05-12 20:37:23 -04002322 if (verfs_match) { /* case 2 */
J. Bruce Fields0f1ba0e2012-05-25 21:24:40 -04002323 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002324 goto out_copy;
2325 }
2326 /* case 5, client reboot */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002327 conf = NULL;
J. Bruce Fields136e6582012-05-12 20:37:23 -04002328 goto out_new;
Mike Sager6ddbbbf2009-06-16 04:20:47 +03002329 }
2330
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002331 if (update) { /* case 7 */
Mike Sager6ddbbbf2009-06-16 04:20:47 +03002332 status = nfserr_noent;
2333 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03002334 }
2335
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03002336 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002337 if (unconf) /* case 4, possible retry or client restart */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002338 unhash_client_locked(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03002339
J. Bruce Fields2dbb2692012-05-14 09:47:11 -04002340 /* case 1 (normal case) */
Andy Adamson0733d212009-04-03 08:28:01 +03002341out_new:
Jeff Laytonfd699b82014-07-30 08:27:14 -04002342 if (conf) {
2343 status = mark_client_expired_locked(conf);
2344 if (status)
2345 goto out;
2346 }
J. Bruce Fields4f540e22013-05-07 11:57:52 -04002347 new->cl_minorversion = cstate->minorversion;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002348 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
Andy Adamson0733d212009-04-03 08:28:01 +03002349
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03002350 gen_clid(new, nn);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05002351 add_to_unconfirmed(new);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002352 swap(new, conf);
Andy Adamson0733d212009-04-03 08:28:01 +03002353out_copy:
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002354 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
2355 exid->clientid.cl_id = conf->cl_clientid.cl_id;
Andy Adamson0733d212009-04-03 08:28:01 +03002356
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002357 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
2358 nfsd4_set_ex_flags(conf, exid);
Andy Adamson0733d212009-04-03 08:28:01 +03002359
2360 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002361 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
Andy Adamson0733d212009-04-03 08:28:01 +03002362 status = nfs_ok;
2363
2364out:
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002365 spin_unlock(&nn->client_lock);
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04002366 if (new)
Trond Myklebust3dbacee2014-07-30 08:27:06 -04002367 expire_client(new);
2368 if (unconf)
2369 expire_client(unconf);
Andy Adamson0733d212009-04-03 08:28:01 +03002370 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002371}
2372
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002373static __be32
Andy Adamson88e588d2009-07-23 19:02:15 -04002374check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002375{
Andy Adamson88e588d2009-07-23 19:02:15 -04002376 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2377 slot_seqid);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002378
2379 /* The slot is in use, and no response has been sent. */
Andy Adamson88e588d2009-07-23 19:02:15 -04002380 if (slot_inuse) {
2381 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002382 return nfserr_jukebox;
2383 else
2384 return nfserr_seq_misordered;
2385 }
J. Bruce Fieldsf6d82482012-02-13 16:13:41 -05002386 /* Note unsigned 32-bit arithmetic handles wraparound: */
Andy Adamson88e588d2009-07-23 19:02:15 -04002387 if (likely(seqid == slot_seqid + 1))
Benny Halevyb85d4c02009-04-03 08:28:08 +03002388 return nfs_ok;
Andy Adamson88e588d2009-07-23 19:02:15 -04002389 if (seqid == slot_seqid)
Benny Halevyb85d4c02009-04-03 08:28:08 +03002390 return nfserr_replay_cache;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002391 return nfserr_seq_misordered;
2392}
2393
Andy Adamson49557cc2009-07-23 19:02:16 -04002394/*
2395 * Cache the create session result into the create session single DRC
2396 * slot cache by saving the xdr structure. sl_seqid has been set.
2397 * Do this for solo or embedded create session operations.
2398 */
2399static void
2400nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002401 struct nfsd4_clid_slot *slot, __be32 nfserr)
Andy Adamson49557cc2009-07-23 19:02:16 -04002402{
2403 slot->sl_status = nfserr;
2404 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2405}
2406
2407static __be32
2408nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2409 struct nfsd4_clid_slot *slot)
2410{
2411 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2412 return slot->sl_status;
2413}
2414
Mi Jinlong1b74c252011-07-14 14:50:17 +08002415#define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2416 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2417 1 + /* MIN tag is length with zero, only length */ \
2418 3 + /* version, opcount, opcode */ \
2419 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2420 /* seqid, slotID, slotID, cache */ \
2421 4 ) * sizeof(__be32))
2422
2423#define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2424 2 + /* verifier: AUTH_NULL, length 0 */\
2425 1 + /* status */ \
2426 1 + /* MIN tag is length with zero, only length */ \
2427 3 + /* opcount, opcode, opstatus*/ \
2428 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2429 /* seqid, slotID, slotID, slotID, status */ \
2430 5 ) * sizeof(__be32))
2431
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002432static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
Mi Jinlong1b74c252011-07-14 14:50:17 +08002433{
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002434 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2435
J. Bruce Fields373cd402013-04-08 15:42:12 -04002436 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2437 return nfserr_toosmall;
2438 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2439 return nfserr_toosmall;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002440 ca->headerpadsz = 0;
2441 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2442 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2443 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2444 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2445 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2446 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2447 /*
2448 * Note decreasing slot size below client's request may make it
2449 * difficult for client to function correctly, whereas
2450 * decreasing the number of slots will (just?) affect
2451 * performance. When short on memory we therefore prefer to
2452 * decrease number of slots instead of their size. Clients that
2453 * request larger slots than they need will get poor results:
2454 */
2455 ca->maxreqs = nfsd4_get_drc_mem(ca);
2456 if (!ca->maxreqs)
2457 return nfserr_jukebox;
2458
J. Bruce Fields373cd402013-04-08 15:42:12 -04002459 return nfs_ok;
Mi Jinlong1b74c252011-07-14 14:50:17 +08002460}
2461
Kinglong Mee8a891632013-12-23 18:11:02 +08002462#define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2463 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2464#define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2465 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2466
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002467static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2468{
2469 ca->headerpadsz = 0;
2470
2471 /*
2472 * These RPC_MAX_HEADER macros are overkill, especially since we
2473 * don't even do gss on the backchannel yet. But this is still
2474 * less than 1k. Tighten up this estimate in the unlikely event
2475 * it turns out to be a problem for some client:
2476 */
Kinglong Mee8a891632013-12-23 18:11:02 +08002477 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002478 return nfserr_toosmall;
Kinglong Mee8a891632013-12-23 18:11:02 +08002479 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002480 return nfserr_toosmall;
2481 ca->maxresp_cached = 0;
2482 if (ca->maxops < 2)
2483 return nfserr_toosmall;
2484
2485 return nfs_ok;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002486}
2487
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002488static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2489{
2490 switch (cbs->flavor) {
2491 case RPC_AUTH_NULL:
2492 case RPC_AUTH_UNIX:
2493 return nfs_ok;
2494 default:
2495 /*
2496 * GSS case: the spec doesn't allow us to return this
2497 * error. But it also doesn't allow us not to support
2498 * GSS.
2499 * I'd rather this fail hard than return some error the
2500 * client might think it can already handle:
2501 */
2502 return nfserr_encr_alg_unsupp;
2503 }
2504}
2505
Andy Adamson069b6ad2009-04-03 08:27:58 +03002506__be32
2507nfsd4_create_session(struct svc_rqst *rqstp,
2508 struct nfsd4_compound_state *cstate,
2509 struct nfsd4_create_session *cr_ses)
2510{
Jeff Layton363168b2009-08-14 12:57:56 -04002511 struct sockaddr *sa = svc_addr(rqstp);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002512 struct nfs4_client *conf, *unconf;
Jeff Laytond20c11d2014-07-30 08:27:07 -04002513 struct nfs4_client *old = NULL;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002514 struct nfsd4_session *new;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002515 struct nfsd4_conn *conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002516 struct nfsd4_clid_slot *cs_slot = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002517 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002518 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002519
Mi Jinlonga62573d2011-03-23 17:57:07 +08002520 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2521 return nfserr_inval;
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002522 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2523 if (status)
2524 return status;
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002525 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
J. Bruce Fields373cd402013-04-08 15:42:12 -04002526 if (status)
2527 return status;
J. Bruce Fields06b332a2013-04-09 11:34:36 -04002528 status = check_backchannel_attrs(&cr_ses->back_channel);
2529 if (status)
Kinglong Meef403e452013-12-23 17:31:21 +08002530 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002531 status = nfserr_jukebox;
Kinglong Mee60810e52014-01-01 00:35:47 +08002532 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002533 if (!new)
2534 goto out_release_drc_mem;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002535 conn = alloc_conn_from_crses(rqstp, cr_ses);
2536 if (!conn)
2537 goto out_free_session;
Mi Jinlonga62573d2011-03-23 17:57:07 +08002538
Jeff Laytond20c11d2014-07-30 08:27:07 -04002539 spin_lock(&nn->client_lock);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002540 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002541 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04002542 WARN_ON_ONCE(conf && unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002543
2544 if (conf) {
J. Bruce Fields57266a62013-04-13 14:27:29 -04002545 status = nfserr_wrong_cred;
2546 if (!mach_creds_match(conf, rqstp))
2547 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002548 cs_slot = &conf->cl_cs_slot;
2549 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03002550 if (status == nfserr_replay_cache) {
Andy Adamson49557cc2009-07-23 19:02:16 -04002551 status = nfsd4_replay_create_session(cr_ses, cs_slot);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002552 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002553 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002554 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002555 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002556 }
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002557 } else if (unconf) {
2558 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
Jeff Layton363168b2009-08-14 12:57:56 -04002559 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002560 status = nfserr_clid_inuse;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002561 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002562 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002563 status = nfserr_wrong_cred;
2564 if (!mach_creds_match(unconf, rqstp))
2565 goto out_free_conn;
Andy Adamson49557cc2009-07-23 19:02:16 -04002566 cs_slot = &unconf->cl_cs_slot;
2567 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
Andy Adamson38eb76a2009-04-03 08:28:32 +03002568 if (status) {
2569 /* an unconfirmed replay returns misordered */
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002570 status = nfserr_seq_misordered;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002571 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002572 }
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03002573 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002574 if (old) {
Jeff Laytond20c11d2014-07-30 08:27:07 -04002575 status = mark_client_expired_locked(old);
Jeff Layton7abea1e2014-07-30 08:27:13 -04002576 if (status) {
2577 old = NULL;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002578 goto out_free_conn;
Jeff Layton7abea1e2014-07-30 08:27:13 -04002579 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04002580 }
J. Bruce Fields8f9d3d32012-09-12 14:41:31 -04002581 move_to_confirmed(unconf);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002582 conf = unconf;
2583 } else {
2584 status = nfserr_stale_clientid;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002585 goto out_free_conn;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002586 }
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002587 status = nfs_ok;
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04002588 /*
J. Bruce Fields408b79b2010-04-15 15:11:09 -04002589 * We do not support RDMA or persistent sessions
2590 */
2591 cr_ses->flags &= ~SESSION4_PERSIST;
2592 cr_ses->flags &= ~SESSION4_RDMA;
2593
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002594 init_session(rqstp, new, conf, cr_ses);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002595 nfsd4_get_session_locked(new);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002596
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -04002597 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002598 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields86c3e162010-10-02 17:04:00 -04002599 cs_slot->sl_seqid++;
Andy Adamson49557cc2009-07-23 19:02:16 -04002600 cr_ses->seqid = cs_slot->sl_seqid;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002601
Jeff Laytond20c11d2014-07-30 08:27:07 -04002602 /* cache solo and embedded create sessions under the client_lock */
Andy Adamson49557cc2009-07-23 19:02:16 -04002603 nfsd4_cache_create_session(cr_ses, cs_slot, status);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002604 spin_unlock(&nn->client_lock);
2605 /* init connection and backchannel */
2606 nfsd4_init_conn(rqstp, conn, new);
2607 nfsd4_put_session(new);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002608 if (old)
2609 expire_client(old);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03002610 return status;
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002611out_free_conn:
Jeff Laytond20c11d2014-07-30 08:27:07 -04002612 spin_unlock(&nn->client_lock);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002613 free_conn(conn);
Jeff Laytond20c11d2014-07-30 08:27:07 -04002614 if (old)
2615 expire_client(old);
J. Bruce Fields81f0b2a2012-09-12 11:04:33 -04002616out_free_session:
2617 __free_session(new);
J. Bruce Fields55c760c2013-04-08 16:44:14 -04002618out_release_drc_mem:
2619 nfsd4_put_drc_mem(&cr_ses->fore_channel);
J. Bruce Fields1ca50792013-03-14 18:12:03 -04002620 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002621}
2622
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002623static __be32 nfsd4_map_bcts_dir(u32 *dir)
2624{
2625 switch (*dir) {
2626 case NFS4_CDFC4_FORE:
2627 case NFS4_CDFC4_BACK:
2628 return nfs_ok;
2629 case NFS4_CDFC4_FORE_OR_BOTH:
2630 case NFS4_CDFC4_BACK_OR_BOTH:
2631 *dir = NFS4_CDFC4_BOTH;
2632 return nfs_ok;
2633 };
2634 return nfserr_inval;
2635}
2636
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002637__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2638{
2639 struct nfsd4_session *session = cstate->session;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002640 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002641 __be32 status;
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002642
J. Bruce Fieldsb78724b2013-05-15 17:34:39 -04002643 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2644 if (status)
2645 return status;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002646 spin_lock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002647 session->se_cb_prog = bc->bc_cb_program;
2648 session->se_cb_sec = bc->bc_cb_sec;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002649 spin_unlock(&nn->client_lock);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04002650
2651 nfsd4_probe_callback(session->se_client);
2652
2653 return nfs_ok;
2654}
2655
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002656__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2657 struct nfsd4_compound_state *cstate,
2658 struct nfsd4_bind_conn_to_session *bcts)
2659{
2660 __be32 status;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002661 struct nfsd4_conn *conn;
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002662 struct nfsd4_session *session;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002663 struct net *net = SVC_NET(rqstp);
2664 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002665
2666 if (!nfsd4_last_compound_op(rqstp))
2667 return nfserr_not_only_op;
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002668 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002669 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002670 spin_unlock(&nn->client_lock);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002671 if (!session)
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002672 goto out_no_session;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002673 status = nfserr_wrong_cred;
2674 if (!mach_creds_match(session->se_client, rqstp))
2675 goto out;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002676 status = nfsd4_map_bcts_dir(&bcts->dir);
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002677 if (status)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002678 goto out;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002679 conn = alloc_conn(rqstp, bcts->dir);
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002680 status = nfserr_jukebox;
J. Bruce Fields3ba63672012-09-11 15:37:40 -04002681 if (!conn)
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002682 goto out;
2683 nfsd4_init_conn(rqstp, conn, session);
2684 status = nfs_ok;
2685out:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002686 nfsd4_put_session(session);
2687out_no_session:
J. Bruce Fields4f6e6c12013-03-18 17:31:30 -04002688 return status;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002689}
2690
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002691static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2692{
2693 if (!session)
2694 return 0;
2695 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2696}
2697
Andy Adamson069b6ad2009-04-03 08:27:58 +03002698__be32
2699nfsd4_destroy_session(struct svc_rqst *r,
2700 struct nfsd4_compound_state *cstate,
2701 struct nfsd4_destroy_session *sessionid)
2702{
Benny Halevye10e0cf2009-04-03 08:28:38 +03002703 struct nfsd4_session *ses;
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002704 __be32 status;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002705 int ref_held_by_me = 0;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002706 struct net *net = SVC_NET(r);
2707 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002708
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002709 status = nfserr_not_only_op;
J. Bruce Fields5d4cec22010-05-01 12:56:06 -04002710 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
J. Bruce Fields57716352010-04-21 12:27:19 -04002711 if (!nfsd4_last_compound_op(r))
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002712 goto out;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002713 ref_held_by_me++;
J. Bruce Fields57716352010-04-21 12:27:19 -04002714 }
Benny Halevye10e0cf2009-04-03 08:28:38 +03002715 dump_sessionid(__func__, &sessionid->sessionid);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002716 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002717 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002718 if (!ses)
2719 goto out_client_lock;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002720 status = nfserr_wrong_cred;
2721 if (!mach_creds_match(ses->se_client, r))
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002722 goto out_put_session;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002723 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002724 if (status)
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002725 goto out_put_session;
Benny Halevye10e0cf2009-04-03 08:28:38 +03002726 unhash_session(ses);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002727 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002728
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -05002729 nfsd4_probe_callback_sync(ses->se_client);
J. Bruce Fields19cf5c02010-06-06 18:37:16 -04002730
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002731 spin_lock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002732 status = nfs_ok;
J. Bruce Fieldsf0f51f52013-06-18 14:26:02 -04002733out_put_session:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002734 nfsd4_put_session_locked(ses);
J. Bruce Fieldsabcdff02013-03-14 19:55:33 -04002735out_client_lock:
2736 spin_unlock(&nn->client_lock);
Benny Halevye10e0cf2009-04-03 08:28:38 +03002737out:
Benny Halevye10e0cf2009-04-03 08:28:38 +03002738 return status;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002739}
2740
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002741static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002742{
2743 struct nfsd4_conn *c;
2744
2745 list_for_each_entry(c, &s->se_conns, cn_persession) {
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002746 if (c->cn_xprt == xpt) {
J. Bruce Fields328ead22010-09-29 16:11:06 -04002747 return c;
2748 }
2749 }
2750 return NULL;
2751}
2752
J. Bruce Fields57266a62013-04-13 14:27:29 -04002753static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
J. Bruce Fields328ead22010-09-29 16:11:06 -04002754{
2755 struct nfs4_client *clp = ses->se_client;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002756 struct nfsd4_conn *c;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002757 __be32 status = nfs_ok;
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002758 int ret;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002759
2760 spin_lock(&clp->cl_lock);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002761 c = __nfsd4_find_conn(new->cn_xprt, ses);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002762 if (c)
2763 goto out_free;
2764 status = nfserr_conn_not_bound_to_session;
2765 if (clp->cl_mach_cred)
2766 goto out_free;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002767 __nfsd4_hash_conn(new, ses);
2768 spin_unlock(&clp->cl_lock);
J. Bruce Fields21b75b02010-10-26 10:07:17 -04002769 ret = nfsd4_register_conn(new);
2770 if (ret)
2771 /* oops; xprt is already down: */
2772 nfsd4_conn_lost(&new->cn_xpt_user);
J. Bruce Fields57266a62013-04-13 14:27:29 -04002773 return nfs_ok;
2774out_free:
2775 spin_unlock(&clp->cl_lock);
2776 free_conn(new);
2777 return status;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002778}
2779
Mi Jinlong868b89c2011-04-27 09:09:58 +08002780static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2781{
2782 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2783
2784 return args->opcnt > session->se_fchannel.maxops;
2785}
2786
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002787static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2788 struct nfsd4_session *session)
2789{
2790 struct xdr_buf *xb = &rqstp->rq_arg;
2791
2792 return xb->len > session->se_fchannel.maxreq_sz;
2793}
2794
Andy Adamson069b6ad2009-04-03 08:27:58 +03002795__be32
Benny Halevyb85d4c02009-04-03 08:28:08 +03002796nfsd4_sequence(struct svc_rqst *rqstp,
Andy Adamson069b6ad2009-04-03 08:27:58 +03002797 struct nfsd4_compound_state *cstate,
2798 struct nfsd4_sequence *seq)
2799{
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002800 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002801 struct xdr_stream *xdr = &resp->xdr;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002802 struct nfsd4_session *session;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002803 struct nfs4_client *clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002804 struct nfsd4_slot *slot;
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002805 struct nfsd4_conn *conn;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002806 __be32 status;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002807 int buflen;
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002808 struct net *net = SVC_NET(rqstp);
2809 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002810
Andy Adamsonf9bb94c2009-04-03 08:28:12 +03002811 if (resp->opcnt != 1)
2812 return nfserr_sequence_pos;
2813
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002814 /*
2815 * Will be either used or freed by nfsd4_sequence_check_conn
2816 * below.
2817 */
2818 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2819 if (!conn)
2820 return nfserr_jukebox;
2821
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002822 spin_lock(&nn->client_lock);
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002823 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002824 if (!session)
J. Bruce Fields221a6872013-04-01 22:23:49 -04002825 goto out_no_session;
2826 clp = session->se_client;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002827
Mi Jinlong868b89c2011-04-27 09:09:58 +08002828 status = nfserr_too_many_ops;
2829 if (nfsd4_session_too_many_ops(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002830 goto out_put_session;
Mi Jinlong868b89c2011-04-27 09:09:58 +08002831
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002832 status = nfserr_req_too_big;
2833 if (nfsd4_request_too_big(rqstp, session))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002834 goto out_put_session;
Mi Jinlongae82a8d2011-07-14 14:56:02 +08002835
Benny Halevyb85d4c02009-04-03 08:28:08 +03002836 status = nfserr_badslot;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03002837 if (seq->slotid >= session->se_fchannel.maxreqs)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002838 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002839
Andy Adamson557ce262009-08-28 08:45:04 -04002840 slot = session->se_slots[seq->slotid];
Benny Halevyb85d4c02009-04-03 08:28:08 +03002841 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2842
Andy Adamsona8dfdae2009-08-28 08:45:02 -04002843 /* We do not negotiate the number of slots yet, so set the
2844 * maxslots to the session maxreqs which is used to encode
2845 * sr_highest_slotid and the sr_target_slot id to maxslots */
2846 seq->maxslots = session->se_fchannel.maxreqs;
2847
J. Bruce Fields73e79482012-02-13 16:39:00 -05002848 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2849 slot->sl_flags & NFSD4_SLOT_INUSE);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002850 if (status == nfserr_replay_cache) {
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002851 status = nfserr_seq_misordered;
2852 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002853 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002854 cstate->slot = slot;
2855 cstate->session = session;
Jeff Layton4b24ca72014-06-30 11:48:44 -04002856 cstate->clp = clp;
Andy Adamsonda3846a2009-04-03 08:28:22 +03002857 /* Return the cached reply status and set cstate->status
Andy Adamson557ce262009-08-28 08:45:04 -04002858 * for nfsd4_proc_compound processing */
Andy Adamsonbf864a32009-04-03 08:28:35 +03002859 status = nfsd4_replay_cache_entry(resp, seq);
Andy Adamsonda3846a2009-04-03 08:28:22 +03002860 cstate->status = nfserr_replay_cache;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002861 goto out;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002862 }
2863 if (status)
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002864 goto out_put_session;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002865
J. Bruce Fields57266a62013-04-13 14:27:29 -04002866 status = nfsd4_sequence_check_conn(conn, session);
J. Bruce Fieldsa663bdd2010-10-21 17:17:31 -04002867 conn = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002868 if (status)
2869 goto out_put_session;
J. Bruce Fields328ead22010-09-29 16:11:06 -04002870
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002871 buflen = (seq->cachethis) ?
2872 session->se_fchannel.maxresp_cached :
2873 session->se_fchannel.maxresp_sz;
2874 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2875 nfserr_rep_too_big;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04002876 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002877 goto out_put_session;
J. Bruce Fields32aaa622014-03-20 20:47:41 -04002878 svc_reserve(rqstp, buflen);
J. Bruce Fields47ee5292014-03-12 21:39:35 -04002879
2880 status = nfs_ok;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002881 /* Success! bump slot seqid */
Benny Halevyb85d4c02009-04-03 08:28:08 +03002882 slot->sl_seqid = seq->seqid;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002883 slot->sl_flags |= NFSD4_SLOT_INUSE;
J. Bruce Fields73e79482012-02-13 16:39:00 -05002884 if (seq->cachethis)
2885 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
J. Bruce Fieldsbf5c43c2012-02-13 16:56:19 -05002886 else
2887 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002888
2889 cstate->slot = slot;
2890 cstate->session = session;
Jeff Layton4b24ca72014-06-30 11:48:44 -04002891 cstate->clp = clp;
Benny Halevyb85d4c02009-04-03 08:28:08 +03002892
Benny Halevyb85d4c02009-04-03 08:28:08 +03002893out:
J. Bruce Fields221a6872013-04-01 22:23:49 -04002894 switch (clp->cl_cb_state) {
2895 case NFSD4_CB_DOWN:
2896 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2897 break;
2898 case NFSD4_CB_FAULT:
2899 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2900 break;
2901 default:
2902 seq->status_flags = 0;
Benny Halevyaaf84eb2009-08-20 03:21:56 +03002903 }
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04002904 if (!list_empty(&clp->cl_revoked))
2905 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
J. Bruce Fields221a6872013-04-01 22:23:49 -04002906out_no_session:
Kinglong Mee3f42d2c2014-03-24 11:56:59 +08002907 if (conn)
2908 free_conn(conn);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03002909 spin_unlock(&nn->client_lock);
Benny Halevyb85d4c02009-04-03 08:28:08 +03002910 return status;
J. Bruce Fields66b2b9b2013-03-19 12:05:39 -04002911out_put_session:
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002912 nfsd4_put_session_locked(session);
J. Bruce Fields221a6872013-04-01 22:23:49 -04002913 goto out_no_session;
Andy Adamson069b6ad2009-04-03 08:27:58 +03002914}
2915
Trond Myklebustb6076642014-06-30 11:48:35 -04002916void
2917nfsd4_sequence_done(struct nfsd4_compoundres *resp)
2918{
2919 struct nfsd4_compound_state *cs = &resp->cstate;
2920
2921 if (nfsd4_has_session(cs)) {
Trond Myklebustb6076642014-06-30 11:48:35 -04002922 if (cs->status != nfserr_replay_cache) {
2923 nfsd4_store_cache_entry(resp);
2924 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
2925 }
Trond Myklebustd4e19e702014-06-30 11:48:42 -04002926 /* Drop session reference that was taken in nfsd4_sequence() */
Trond Myklebustb6076642014-06-30 11:48:35 -04002927 nfsd4_put_session(cs->session);
Jeff Layton4b24ca72014-06-30 11:48:44 -04002928 } else if (cs->clp)
2929 put_client_renew(cs->clp);
Trond Myklebustb6076642014-06-30 11:48:35 -04002930}
2931
Mi Jinlong345c2842011-10-20 17:51:39 +08002932__be32
2933nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2934{
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002935 struct nfs4_client *conf, *unconf;
2936 struct nfs4_client *clp = NULL;
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002937 __be32 status = 0;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002938 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Mi Jinlong345c2842011-10-20 17:51:39 +08002939
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002940 spin_lock(&nn->client_lock);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03002941 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03002942 conf = find_confirmed_client(&dc->clientid, true, nn);
J. Bruce Fields78389042013-03-12 10:12:37 -04002943 WARN_ON_ONCE(conf && unconf);
Mi Jinlong345c2842011-10-20 17:51:39 +08002944
2945 if (conf) {
J. Bruce Fieldsc0293b02013-03-14 18:20:01 -04002946 if (client_has_state(conf)) {
Mi Jinlong345c2842011-10-20 17:51:39 +08002947 status = nfserr_clientid_busy;
2948 goto out;
2949 }
Jeff Laytonfd699b82014-07-30 08:27:14 -04002950 status = mark_client_expired_locked(conf);
2951 if (status)
2952 goto out;
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002953 clp = conf;
Mi Jinlong345c2842011-10-20 17:51:39 +08002954 } else if (unconf)
2955 clp = unconf;
2956 else {
2957 status = nfserr_stale_clientid;
2958 goto out;
2959 }
J. Bruce Fields57266a62013-04-13 14:27:29 -04002960 if (!mach_creds_match(clp, rqstp)) {
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002961 clp = NULL;
J. Bruce Fields57266a62013-04-13 14:27:29 -04002962 status = nfserr_wrong_cred;
2963 goto out;
2964 }
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002965 unhash_client_locked(clp);
Mi Jinlong345c2842011-10-20 17:51:39 +08002966out:
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002967 spin_unlock(&nn->client_lock);
Trond Myklebust6b10ad12014-07-30 08:27:08 -04002968 if (clp)
2969 expire_client(clp);
Mi Jinlong345c2842011-10-20 17:51:39 +08002970 return status;
2971}
2972
Andy Adamson069b6ad2009-04-03 08:27:58 +03002973__be32
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002974nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2975{
J. Bruce Fields57b7b432012-04-25 17:58:50 -04002976 __be32 status = 0;
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002977
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002978 if (rc->rca_one_fs) {
2979 if (!cstate->current_fh.fh_dentry)
2980 return nfserr_nofilehandle;
2981 /*
2982 * We don't take advantage of the rca_one_fs case.
2983 * That's OK, it's optional, we can safely ignore it.
2984 */
2985 return nfs_ok;
2986 }
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002987
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002988 status = nfserr_complete_already;
Jeff Laytona52d7262012-03-21 09:52:02 -04002989 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2990 &cstate->session->se_client->cl_flags))
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08002991 goto out;
2992
2993 status = nfserr_stale_clientid;
2994 if (is_client_expired(cstate->session->se_client))
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04002995 /*
2996 * The following error isn't really legal.
2997 * But we only get here if the client just explicitly
2998 * destroyed the client. Surely it no longer cares what
2999 * error it gets back on an operation for the dead
3000 * client.
3001 */
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003002 goto out;
3003
3004 status = nfs_ok;
Jeff Layton2a4317c2012-03-21 16:42:43 -04003005 nfsd4_client_record_create(cstate->session->se_client);
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003006out:
Mi Jinlongbcecf1c2011-04-27 09:14:30 +08003007 return status;
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04003008}
3009
3010__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003011nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3012 struct nfsd4_setclientid *setclid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013{
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04003014 struct xdr_netobj clname = setclid->se_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003015 nfs4_verifier clverifier = setclid->se_verf;
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003016 struct nfs4_client *conf, *new;
3017 struct nfs4_client *unconf = NULL;
Al Virob37ad282006-10-19 23:28:59 -07003018 __be32 status;
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03003019 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3020
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003021 new = create_client(clname, rqstp, &clverifier);
3022 if (new == NULL)
3023 return nfserr_jukebox;
J. Bruce Fields63db4632012-05-18 21:54:19 -04003024 /* Cases below refer to rfc 3530 section 14.2.33: */
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003025 spin_lock(&nn->client_lock);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03003026 conf = find_confirmed_client_by_name(&clname, nn);
NeilBrown28ce6052005-06-23 22:03:56 -07003027 if (conf) {
J. Bruce Fields63db4632012-05-18 21:54:19 -04003028 /* case 0: */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029 status = nfserr_clid_inuse;
J. Bruce Fieldse203d502010-11-24 17:30:54 -05003030 if (clp_used_exchangeid(conf))
3031 goto out;
J. Bruce Fields026722c2009-03-18 15:06:26 -04003032 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
Jeff Layton363168b2009-08-14 12:57:56 -04003033 char addr_str[INET6_ADDRSTRLEN];
3034 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
3035 sizeof(addr_str));
3036 dprintk("NFSD: setclientid: string in use by client "
3037 "at %s\n", addr_str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003038 goto out;
3039 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03003041 unconf = find_unconfirmed_client_by_name(&clname, nn);
J. Bruce Fields8f930712012-05-18 22:06:41 -04003042 if (unconf)
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003043 unhash_client_locked(unconf);
J. Bruce Fields34b232b2012-05-18 22:23:42 -04003044 if (conf && same_verf(&conf->cl_verifier, &clverifier))
J. Bruce Fields63db4632012-05-18 21:54:19 -04003045 /* case 1: probable callback update */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 copy_clid(new, conf);
J. Bruce Fields34b232b2012-05-18 22:23:42 -04003047 else /* case 4 (new client) or cases 2, 3 (client reboot): */
Stanislav Kinsburskyc212cec2012-11-14 18:21:10 +03003048 gen_clid(new, nn);
J. Bruce Fields8323c3b2010-10-19 19:36:51 -04003049 new->cl_minorversion = 0;
Takuma Umeya6f3d7722010-12-15 14:09:01 +09003050 gen_callback(new, setclid, rqstp);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05003051 add_to_unconfirmed(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
3053 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
3054 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003055 new = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056 status = nfs_ok;
3057out:
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003058 spin_unlock(&nn->client_lock);
Trond Myklebust5cc40fd2014-07-30 08:27:05 -04003059 if (new)
3060 free_client(new);
Trond Myklebust3dbacee2014-07-30 08:27:06 -04003061 if (unconf)
3062 expire_client(unconf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003063 return status;
3064}
3065
3066
Al Virob37ad282006-10-19 23:28:59 -07003067__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08003068nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
3069 struct nfsd4_compound_state *cstate,
3070 struct nfsd4_setclientid_confirm *setclientid_confirm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071{
NeilBrown21ab45a2005-06-23 22:04:14 -07003072 struct nfs4_client *conf, *unconf;
Jeff Laytond20c11d2014-07-30 08:27:07 -04003073 struct nfs4_client *old = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003074 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
3075 clientid_t * clid = &setclientid_confirm->sc_clientid;
Al Virob37ad282006-10-19 23:28:59 -07003076 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03003077 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003079 if (STALE_CLIENTID(clid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003080 return nfserr_stale_clientid;
NeilBrown21ab45a2005-06-23 22:04:14 -07003081
Jeff Laytond20c11d2014-07-30 08:27:07 -04003082 spin_lock(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03003083 conf = find_confirmed_client(clid, false, nn);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03003084 unconf = find_unconfirmed_client(clid, false, nn);
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05003085 /*
J. Bruce Fields8695b902012-05-19 10:05:58 -04003086 * We try hard to give out unique clientid's, so if we get an
3087 * attempt to confirm the same clientid with a different cred,
3088 * there's a bug somewhere. Let's charitably assume it's our
3089 * bug.
J. Bruce Fieldsa186e762007-11-20 16:11:27 -05003090 */
J. Bruce Fields8695b902012-05-19 10:05:58 -04003091 status = nfserr_serverfault;
3092 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
3093 goto out;
3094 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
3095 goto out;
J. Bruce Fields63db4632012-05-18 21:54:19 -04003096 /* cases below refer to rfc 3530 section 14.2.34: */
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003097 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
3098 if (conf && !unconf) /* case 2: probable retransmit */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099 status = nfs_ok;
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003100 else /* case 4: client hasn't noticed we rebooted yet? */
3101 status = nfserr_stale_clientid;
3102 goto out;
3103 }
3104 status = nfs_ok;
3105 if (conf) { /* case 1: callback update */
Jeff Laytond20c11d2014-07-30 08:27:07 -04003106 old = unconf;
3107 unhash_client_locked(old);
J. Bruce Fields8695b902012-05-19 10:05:58 -04003108 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
J. Bruce Fields90d700b2012-05-19 13:55:22 -04003109 } else { /* case 3: normal case; new or rebooted client */
Jeff Laytond20c11d2014-07-30 08:27:07 -04003110 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3111 if (old) {
3112 status = mark_client_expired_locked(old);
Jeff Layton7abea1e2014-07-30 08:27:13 -04003113 if (status) {
3114 old = NULL;
J. Bruce Fields221a6872013-04-01 22:23:49 -04003115 goto out;
Jeff Layton7abea1e2014-07-30 08:27:13 -04003116 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04003117 }
J. Bruce Fields8695b902012-05-19 10:05:58 -04003118 move_to_confirmed(unconf);
Jeff Laytond20c11d2014-07-30 08:27:07 -04003119 conf = unconf;
NeilBrown08e89872005-06-23 22:04:11 -07003120 }
Jeff Laytond20c11d2014-07-30 08:27:07 -04003121 get_client_locked(conf);
3122 spin_unlock(&nn->client_lock);
3123 nfsd4_probe_callback(conf);
3124 spin_lock(&nn->client_lock);
3125 put_client_renew_locked(conf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126out:
Jeff Laytond20c11d2014-07-30 08:27:07 -04003127 spin_unlock(&nn->client_lock);
3128 if (old)
3129 expire_client(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 return status;
3131}
3132
J. Bruce Fields32513b42011-10-13 16:00:16 -04003133static struct nfs4_file *nfsd4_alloc_file(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134{
J. Bruce Fields32513b42011-10-13 16:00:16 -04003135 return kmem_cache_alloc(file_slab, GFP_KERNEL);
3136}
3137
3138/* OPEN Share state helper functions */
Jeff Layton5b095e92014-10-23 08:01:02 -04003139static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
3140 struct nfs4_file *fp)
J. Bruce Fields32513b42011-10-13 16:00:16 -04003141{
Trond Myklebust950e0112014-06-30 11:48:31 -04003142 lockdep_assert_held(&state_lock);
3143
J. Bruce Fields32513b42011-10-13 16:00:16 -04003144 atomic_set(&fp->fi_ref, 1);
Trond Myklebust1d31a252014-07-10 14:07:25 -04003145 spin_lock_init(&fp->fi_lock);
J. Bruce Fields32513b42011-10-13 16:00:16 -04003146 INIT_LIST_HEAD(&fp->fi_stateids);
3147 INIT_LIST_HEAD(&fp->fi_delegations);
Sachin Bhamare8287f002015-04-27 14:50:14 +02003148 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
Trond Myklebuste2cf80d2014-07-23 16:17:38 -04003149 fh_copy_shallow(&fp->fi_fhandle, fh);
Jeff Layton0c637be2014-08-22 12:05:43 -04003150 fp->fi_deleg_file = NULL;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003151 fp->fi_had_conflict = false;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003152 fp->fi_share_deny = 0;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003153 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
3154 memset(fp->fi_access, 0, sizeof(fp->fi_access));
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02003155#ifdef CONFIG_NFSD_PNFS
3156 INIT_LIST_HEAD(&fp->fi_lo_states);
Christoph Hellwigc5c707f2014-09-23 12:38:48 +02003157 atomic_set(&fp->fi_lo_recalls, 0);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02003158#endif
Jeff Layton5b095e92014-10-23 08:01:02 -04003159 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160}
3161
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04003162void
NeilBrowne60d4392005-06-23 22:03:01 -07003163nfsd4_free_slabs(void)
3164{
Sachin Bhamare8287f002015-04-27 14:50:14 +02003165 kmem_cache_destroy(odstate_slab);
Christoph Hellwigabf11352014-05-21 07:43:03 -07003166 kmem_cache_destroy(openowner_slab);
3167 kmem_cache_destroy(lockowner_slab);
3168 kmem_cache_destroy(file_slab);
3169 kmem_cache_destroy(stateid_slab);
3170 kmem_cache_destroy(deleg_slab);
NeilBrowne60d4392005-06-23 22:03:01 -07003171}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172
Bryan Schumaker72083392011-11-01 15:24:59 -04003173int
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174nfsd4_init_slabs(void)
3175{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003176 openowner_slab = kmem_cache_create("nfsd4_openowners",
3177 sizeof(struct nfs4_openowner), 0, 0, NULL);
3178 if (openowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003179 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003180 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
Yanchuan Nian3c407942012-10-24 14:44:19 +08003181 sizeof(struct nfs4_lockowner), 0, 0, NULL);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003182 if (lockowner_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003183 goto out_free_openowner_slab;
NeilBrowne60d4392005-06-23 22:03:01 -07003184 file_slab = kmem_cache_create("nfsd4_files",
Paul Mundt20c2df82007-07-20 10:11:58 +09003185 sizeof(struct nfs4_file), 0, 0, NULL);
NeilBrowne60d4392005-06-23 22:03:01 -07003186 if (file_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003187 goto out_free_lockowner_slab;
NeilBrown5ac049a2005-06-23 22:03:03 -07003188 stateid_slab = kmem_cache_create("nfsd4_stateids",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003189 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
NeilBrown5ac049a2005-06-23 22:03:03 -07003190 if (stateid_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003191 goto out_free_file_slab;
NeilBrown5b2d21c2005-06-23 22:03:04 -07003192 deleg_slab = kmem_cache_create("nfsd4_delegations",
Paul Mundt20c2df82007-07-20 10:11:58 +09003193 sizeof(struct nfs4_delegation), 0, 0, NULL);
NeilBrown5b2d21c2005-06-23 22:03:04 -07003194 if (deleg_slab == NULL)
Christoph Hellwigabf11352014-05-21 07:43:03 -07003195 goto out_free_stateid_slab;
Sachin Bhamare8287f002015-04-27 14:50:14 +02003196 odstate_slab = kmem_cache_create("nfsd4_odstate",
3197 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
3198 if (odstate_slab == NULL)
3199 goto out_free_deleg_slab;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200 return 0;
Christoph Hellwigabf11352014-05-21 07:43:03 -07003201
Sachin Bhamare8287f002015-04-27 14:50:14 +02003202out_free_deleg_slab:
3203 kmem_cache_destroy(deleg_slab);
Christoph Hellwigabf11352014-05-21 07:43:03 -07003204out_free_stateid_slab:
3205 kmem_cache_destroy(stateid_slab);
3206out_free_file_slab:
3207 kmem_cache_destroy(file_slab);
3208out_free_lockowner_slab:
3209 kmem_cache_destroy(lockowner_slab);
3210out_free_openowner_slab:
3211 kmem_cache_destroy(openowner_slab);
3212out:
NeilBrowne60d4392005-06-23 22:03:01 -07003213 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3214 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003215}
3216
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003217static void init_nfs4_replay(struct nfs4_replay *rp)
3218{
3219 rp->rp_status = nfserr_serverfault;
3220 rp->rp_buflen = 0;
3221 rp->rp_buf = rp->rp_ibuf;
Jeff Layton58fb12e2014-07-29 21:34:27 -04003222 mutex_init(&rp->rp_mutex);
3223}
3224
3225static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
3226 struct nfs4_stateowner *so)
3227{
3228 if (!nfsd4_has_session(cstate)) {
3229 mutex_lock(&so->so_replay.rp_mutex);
Kinglong Meeb5971af2014-08-22 10:18:43 -04003230 cstate->replay_owner = nfs4_get_stateowner(so);
Jeff Layton58fb12e2014-07-29 21:34:27 -04003231 }
3232}
3233
3234void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
3235{
3236 struct nfs4_stateowner *so = cstate->replay_owner;
3237
3238 if (so != NULL) {
3239 cstate->replay_owner = NULL;
3240 mutex_unlock(&so->so_replay.rp_mutex);
3241 nfs4_put_stateowner(so);
3242 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003243}
3244
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003245static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003246{
3247 struct nfs4_stateowner *sop;
3248
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003249 sop = kmem_cache_alloc(slab, GFP_KERNEL);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003250 if (!sop)
3251 return NULL;
3252
3253 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
3254 if (!sop->so_owner.data) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003255 kmem_cache_free(slab, sop);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003256 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257 }
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003258 sop->so_owner.len = owner->len;
3259
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003260 INIT_LIST_HEAD(&sop->so_stateids);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003261 sop->so_client = clp;
3262 init_nfs4_replay(&sop->so_replay);
Jeff Layton6b180f02014-07-29 21:34:26 -04003263 atomic_set(&sop->so_count, 1);
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003264 return sop;
3265}
3266
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003267static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
J. Bruce Fieldsff194bd2011-08-12 09:42:57 -04003268{
Trond Myklebustd4f04892014-07-29 21:34:36 -04003269 lockdep_assert_held(&clp->cl_lock);
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03003270
Trond Myklebustd4f04892014-07-29 21:34:36 -04003271 list_add(&oo->oo_owner.so_strhash,
3272 &clp->cl_ownerstr_hashtbl[strhashval]);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003273 list_add(&oo->oo_perclient, &clp->cl_openowners);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274}
3275
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003276static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
3277{
Trond Myklebustd4f04892014-07-29 21:34:36 -04003278 unhash_openowner_locked(openowner(so));
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003279}
3280
Jeff Layton6b180f02014-07-29 21:34:26 -04003281static void nfs4_free_openowner(struct nfs4_stateowner *so)
3282{
3283 struct nfs4_openowner *oo = openowner(so);
3284
3285 kmem_cache_free(openowner_slab, oo);
3286}
3287
3288static const struct nfs4_stateowner_operations openowner_ops = {
Jeff Layton8f4b54c2014-07-29 21:34:29 -04003289 .so_unhash = nfs4_unhash_openowner,
3290 .so_free = nfs4_free_openowner,
Jeff Layton6b180f02014-07-29 21:34:26 -04003291};
3292
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003293static struct nfs4_openowner *
Trond Myklebust13d6f662014-06-30 11:48:45 -04003294alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
Jeff Laytondb24b3b2014-06-30 11:48:36 -04003295 struct nfsd4_compound_state *cstate)
3296{
Trond Myklebust13d6f662014-06-30 11:48:45 -04003297 struct nfs4_client *clp = cstate->clp;
Trond Myklebust7ffb5882014-07-29 21:34:34 -04003298 struct nfs4_openowner *oo, *ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003299
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003300 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
3301 if (!oo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302 return NULL;
Jeff Layton6b180f02014-07-29 21:34:26 -04003303 oo->oo_owner.so_ops = &openowner_ops;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003304 oo->oo_owner.so_is_open_owner = 1;
3305 oo->oo_owner.so_seqid = open->op_seqid;
Jeff Laytond3134b12014-07-29 21:34:32 -04003306 oo->oo_flags = 0;
Jeff Laytondb24b3b2014-06-30 11:48:36 -04003307 if (nfsd4_has_session(cstate))
3308 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003309 oo->oo_time = 0;
J. Bruce Fields38c387b2011-09-16 17:42:48 -04003310 oo->oo_last_closed_stid = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003311 INIT_LIST_HEAD(&oo->oo_close_lru);
Trond Myklebustd4f04892014-07-29 21:34:36 -04003312 spin_lock(&clp->cl_lock);
3313 ret = find_openstateowner_str_locked(strhashval, open, clp);
Trond Myklebust7ffb5882014-07-29 21:34:34 -04003314 if (ret == NULL) {
3315 hash_openowner(oo, clp, strhashval);
3316 ret = oo;
3317 } else
3318 nfs4_free_openowner(&oo->oo_owner);
Trond Myklebustd4f04892014-07-29 21:34:36 -04003319 spin_unlock(&clp->cl_lock);
Jeff Laytonc5952332015-03-23 10:53:42 -04003320 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321}
3322
J. Bruce Fields996e0932011-10-17 11:14:48 -04003323static 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 -04003324 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325
Trond Myklebustd6f2bc52014-07-29 21:34:19 -04003326 atomic_inc(&stp->st_stid.sc_count);
J. Bruce Fields3abdb602013-02-03 12:23:01 -05003327 stp->st_stid.sc_type = NFS4_OPEN_STID;
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04003328 INIT_LIST_HEAD(&stp->st_locks);
Kinglong Meeb5971af2014-08-22 10:18:43 -04003329 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
NeilBrown13cd2182005-06-23 22:03:10 -07003330 get_nfs4_file(fp);
Trond Myklebust11b91642014-07-29 21:34:08 -04003331 stp->st_stid.sc_file = fp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003332 stp->st_access_bmap = 0;
3333 stp->st_deny_bmap = 0;
NeilBrown4c4cd222005-07-07 17:59:27 -07003334 stp->st_openstp = NULL;
Jeff Layton1c755dc2014-07-29 21:34:12 -04003335 spin_lock(&oo->oo_owner.so_client->cl_lock);
3336 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
Trond Myklebust1d31a252014-07-10 14:07:25 -04003337 spin_lock(&fp->fi_lock);
3338 list_add(&stp->st_perfile, &fp->fi_stateids);
3339 spin_unlock(&fp->fi_lock);
Jeff Layton1c755dc2014-07-29 21:34:12 -04003340 spin_unlock(&oo->oo_owner.so_client->cl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003341}
3342
Jeff Laytond3134b12014-07-29 21:34:32 -04003343/*
3344 * In the 4.0 case we need to keep the owners around a little while to handle
3345 * CLOSE replay. We still do need to release any file access that is held by
3346 * them before returning however.
3347 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003348static void
Jeff Laytond3134b12014-07-29 21:34:32 -04003349move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350{
Jeff Layton217526e2014-07-30 08:27:11 -04003351 struct nfs4_ol_stateid *last;
Jeff Laytond3134b12014-07-29 21:34:32 -04003352 struct nfs4_openowner *oo = openowner(s->st_stateowner);
3353 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
3354 nfsd_net_id);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003355
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003356 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357
Jeff Laytonb401be222014-07-29 21:34:33 -04003358 /*
3359 * We know that we hold one reference via nfsd4_close, and another
3360 * "persistent" reference for the client. If the refcount is higher
3361 * than 2, then there are still calls in progress that are using this
3362 * stateid. We can't put the sc_file reference until they are finished.
3363 * Wait for the refcount to drop to 2. Since it has been unhashed,
3364 * there should be no danger of the refcount going back up again at
3365 * this point.
3366 */
3367 wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2);
3368
Jeff Laytond3134b12014-07-29 21:34:32 -04003369 release_all_access(s);
3370 if (s->st_stid.sc_file) {
3371 put_nfs4_file(s->st_stid.sc_file);
3372 s->st_stid.sc_file = NULL;
3373 }
Jeff Layton217526e2014-07-30 08:27:11 -04003374
3375 spin_lock(&nn->client_lock);
3376 last = oo->oo_last_closed_stid;
Jeff Laytond3134b12014-07-29 21:34:32 -04003377 oo->oo_last_closed_stid = s;
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03003378 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003379 oo->oo_time = get_seconds();
Jeff Layton217526e2014-07-30 08:27:11 -04003380 spin_unlock(&nn->client_lock);
3381 if (last)
3382 nfs4_put_stid(&last->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383}
3384
Linus Torvalds1da177e2005-04-16 15:20:36 -07003385/* search file_hashtbl[] for file */
3386static struct nfs4_file *
Jeff Layton5b095e92014-10-23 08:01:02 -04003387find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003389 struct nfs4_file *fp;
3390
Jeff Layton5b095e92014-10-23 08:01:02 -04003391 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
Christoph Hellwig4d94c2e2014-08-14 08:41:48 +02003392 if (fh_match(&fp->fi_fhandle, fh)) {
Jeff Layton5b095e92014-10-23 08:01:02 -04003393 if (atomic_inc_not_zero(&fp->fi_ref))
3394 return fp;
NeilBrown13cd2182005-06-23 22:03:10 -07003395 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396 }
3397 return NULL;
3398}
3399
Christoph Hellwige6ba76e2014-08-14 08:50:16 +02003400struct nfs4_file *
Trond Myklebustca943212014-07-23 16:17:39 -04003401find_file(struct knfsd_fh *fh)
Trond Myklebust950e0112014-06-30 11:48:31 -04003402{
3403 struct nfs4_file *fp;
Jeff Layton5b095e92014-10-23 08:01:02 -04003404 unsigned int hashval = file_hashval(fh);
Trond Myklebust950e0112014-06-30 11:48:31 -04003405
Jeff Layton5b095e92014-10-23 08:01:02 -04003406 rcu_read_lock();
3407 fp = find_file_locked(fh, hashval);
3408 rcu_read_unlock();
Trond Myklebust950e0112014-06-30 11:48:31 -04003409 return fp;
3410}
3411
3412static struct nfs4_file *
Jeff Laytonf9c00c32014-07-23 16:17:41 -04003413find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
Trond Myklebust950e0112014-06-30 11:48:31 -04003414{
3415 struct nfs4_file *fp;
Jeff Layton5b095e92014-10-23 08:01:02 -04003416 unsigned int hashval = file_hashval(fh);
3417
3418 rcu_read_lock();
3419 fp = find_file_locked(fh, hashval);
3420 rcu_read_unlock();
3421 if (fp)
3422 return fp;
Trond Myklebust950e0112014-06-30 11:48:31 -04003423
3424 spin_lock(&state_lock);
Jeff Layton5b095e92014-10-23 08:01:02 -04003425 fp = find_file_locked(fh, hashval);
3426 if (likely(fp == NULL)) {
3427 nfsd4_init_file(fh, hashval, new);
Trond Myklebust950e0112014-06-30 11:48:31 -04003428 fp = new;
3429 }
3430 spin_unlock(&state_lock);
3431
3432 return fp;
3433}
3434
J. Bruce Fields4f83aa32008-07-07 15:02:02 -04003435/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436 * Called to check deny when READ with all zero stateid or
3437 * WRITE with all zero or all one stateid
3438 */
Al Virob37ad282006-10-19 23:28:59 -07003439static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3441{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442 struct nfs4_file *fp;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003443 __be32 ret = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444
Trond Myklebustca943212014-07-23 16:17:39 -04003445 fp = find_file(&current_fh->fh_handle);
NeilBrown13cd2182005-06-23 22:03:10 -07003446 if (!fp)
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003447 return ret;
3448 /* Check for conflicting share reservations */
Trond Myklebust1d31a252014-07-10 14:07:25 -04003449 spin_lock(&fp->fi_lock);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003450 if (fp->fi_share_deny & deny_type)
3451 ret = nfserr_locked;
Trond Myklebust1d31a252014-07-10 14:07:25 -04003452 spin_unlock(&fp->fi_lock);
NeilBrown13cd2182005-06-23 22:03:10 -07003453 put_nfs4_file(fp);
3454 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003455}
3456
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003457static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458{
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003459 struct nfs4_delegation *dp = cb_to_delegation(cb);
Trond Myklebust11b91642014-07-29 21:34:08 -04003460 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
3461 nfsd_net_id);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04003462
Trond Myklebust11b91642014-07-29 21:34:08 -04003463 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
Jeff Laytonf54fe962014-07-25 07:34:26 -04003464
Jeff Layton02e12152014-07-16 10:31:57 -04003465 /*
3466 * We can't do this in nfsd_break_deleg_cb because it is
Jeff Laytonf54fe962014-07-25 07:34:26 -04003467 * already holding inode->i_lock.
3468 *
Jeff Laytondff13992014-07-08 14:02:49 -04003469 * If the dl_time != 0, then we know that it has already been
3470 * queued for a lease break. Don't queue it again.
3471 */
Jeff Laytonf54fe962014-07-25 07:34:26 -04003472 spin_lock(&state_lock);
Jeff Laytondff13992014-07-08 14:02:49 -04003473 if (dp->dl_time == 0) {
Jeff Laytondff13992014-07-08 14:02:49 -04003474 dp->dl_time = get_seconds();
Jeff Layton02e12152014-07-16 10:31:57 -04003475 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
Jeff Laytondff13992014-07-08 14:02:49 -04003476 }
Jeff Layton02e12152014-07-16 10:31:57 -04003477 spin_unlock(&state_lock);
3478}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479
Christoph Hellwig0162ac22014-09-24 12:19:19 +02003480static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
3481 struct rpc_task *task)
3482{
3483 struct nfs4_delegation *dp = cb_to_delegation(cb);
3484
3485 switch (task->tk_status) {
3486 case 0:
3487 return 1;
3488 case -EBADHANDLE:
3489 case -NFS4ERR_BAD_STATEID:
3490 /*
3491 * Race: client probably got cb_recall before open reply
3492 * granting delegation.
3493 */
3494 if (dp->dl_retries--) {
3495 rpc_delay(task, 2 * HZ);
3496 return 0;
3497 }
3498 /*FALLTHRU*/
3499 default:
3500 return -1;
3501 }
3502}
3503
3504static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
3505{
3506 struct nfs4_delegation *dp = cb_to_delegation(cb);
3507
3508 nfs4_put_stid(&dp->dl_stid);
3509}
3510
3511static struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
3512 .prepare = nfsd4_cb_recall_prepare,
3513 .done = nfsd4_cb_recall_done,
3514 .release = nfsd4_cb_recall_release,
3515};
3516
Jeff Layton02e12152014-07-16 10:31:57 -04003517static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3518{
3519 /*
3520 * We're assuming the state code never drops its reference
3521 * without first removing the lease. Since we're in this lease
3522 * callback (and since the lease code is serialized by the kernel
3523 * lock) we know the server hasn't removed the lease yet, we know
3524 * it's safe to take a reference.
3525 */
Trond Myklebust72c0b0f2014-07-21 09:34:58 -04003526 atomic_inc(&dp->dl_stid.sc_count);
Christoph Hellwigf0b5de12014-09-24 12:19:18 +02003527 nfsd4_run_cb(&dp->dl_recall);
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003528}
3529
Jeff Layton1c8c6012013-06-21 08:58:15 -04003530/* Called from break_lease() with i_lock held. */
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003531static bool
3532nfsd_break_deleg_cb(struct file_lock *fl)
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003533{
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003534 bool ret = false;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003535 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
3536 struct nfs4_delegation *dp;
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003537
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003538 if (!fp) {
3539 WARN(1, "(%p)->fl_owner NULL\n", fl);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003540 return ret;
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003541 }
3542 if (fp->fi_had_conflict) {
3543 WARN(1, "duplicate break on %p\n", fp);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003544 return ret;
J. Bruce Fields7fa10cd2012-10-16 12:39:33 -04003545 }
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04003546 /*
3547 * We don't want the locks code to timeout the lease for us;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003548 * we'll remove it ourself if a delegation isn't returned
J. Bruce Fields6b57d9c2011-01-31 11:54:04 -05003549 * in time:
J. Bruce Fields0272e1f2007-09-12 18:56:12 -04003550 */
3551 fl->fl_break_time = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003552
Jeff Layton02e12152014-07-16 10:31:57 -04003553 spin_lock(&fp->fi_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04003554 fp->fi_had_conflict = true;
3555 /*
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003556 * If there are no delegations on the list, then return true
3557 * so that the lease code will go ahead and delete it.
Jeff Layton417c6622014-07-21 09:34:57 -04003558 */
3559 if (list_empty(&fp->fi_delegations))
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003560 ret = true;
Jeff Layton417c6622014-07-21 09:34:57 -04003561 else
3562 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
3563 nfsd_break_one_deleg(dp);
Jeff Layton02e12152014-07-16 10:31:57 -04003564 spin_unlock(&fp->fi_lock);
Jeff Layton4d01b7f2014-09-01 15:06:54 -04003565 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566}
3567
Jeff Laytonc45198e2014-09-01 07:12:07 -04003568static int
Jeff Layton7448cc32015-01-16 15:05:57 -05003569nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
3570 struct list_head *dispose)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003571{
3572 if (arg & F_UNLCK)
Jeff Laytonc45198e2014-09-01 07:12:07 -04003573 return lease_modify(onlist, arg, dispose);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574 else
3575 return -EAGAIN;
3576}
3577
Alexey Dobriyan7b021962009-09-21 17:01:12 -07003578static const struct lock_manager_operations nfsd_lease_mng_ops = {
J. Bruce Fields8fb47a42011-07-20 20:21:59 -04003579 .lm_break = nfsd_break_deleg_cb,
3580 .lm_change = nfsd_change_deleg_cb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581};
3582
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04003583static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3584{
3585 if (nfsd4_has_session(cstate))
3586 return nfs_ok;
3587 if (seqid == so->so_seqid - 1)
3588 return nfserr_replay_me;
3589 if (seqid == so->so_seqid)
3590 return nfs_ok;
3591 return nfserr_bad_seqid;
3592}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593
Jeff Layton4b24ca72014-06-30 11:48:44 -04003594static __be32 lookup_clientid(clientid_t *clid,
3595 struct nfsd4_compound_state *cstate,
3596 struct nfsd_net *nn)
3597{
3598 struct nfs4_client *found;
3599
3600 if (cstate->clp) {
3601 found = cstate->clp;
3602 if (!same_clid(&found->cl_clientid, clid))
3603 return nfserr_stale_clientid;
3604 return nfs_ok;
3605 }
3606
3607 if (STALE_CLIENTID(clid, nn))
3608 return nfserr_stale_clientid;
3609
3610 /*
3611 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3612 * cached already then we know this is for is for v4.0 and "sessions"
3613 * will be false.
3614 */
3615 WARN_ON_ONCE(cstate->session);
Trond Myklebust3e339f92014-07-30 08:27:09 -04003616 spin_lock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003617 found = find_confirmed_client(clid, false, nn);
Trond Myklebust3e339f92014-07-30 08:27:09 -04003618 if (!found) {
3619 spin_unlock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003620 return nfserr_expired;
Trond Myklebust3e339f92014-07-30 08:27:09 -04003621 }
3622 atomic_inc(&found->cl_refcount);
3623 spin_unlock(&nn->client_lock);
Jeff Layton4b24ca72014-06-30 11:48:44 -04003624
3625 /* Cache the nfs4_client in cstate! */
3626 cstate->clp = found;
Jeff Layton4b24ca72014-06-30 11:48:44 -04003627 return nfs_ok;
3628}
3629
Al Virob37ad282006-10-19 23:28:59 -07003630__be32
Andy Adamson66689582009-04-03 08:28:45 +03003631nfsd4_process_open1(struct nfsd4_compound_state *cstate,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03003632 struct nfsd4_open *open, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003633{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 clientid_t *clientid = &open->op_clientid;
3635 struct nfs4_client *clp = NULL;
3636 unsigned int strhashval;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003637 struct nfs4_openowner *oo = NULL;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003638 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04003640 if (STALE_CLIENTID(&open->op_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003641 return nfserr_stale_clientid;
J. Bruce Fields32513b42011-10-13 16:00:16 -04003642 /*
3643 * In case we need it later, after we've already created the
3644 * file and don't want to risk a further failure:
3645 */
3646 open->op_file = nfsd4_alloc_file();
3647 if (open->op_file == NULL)
3648 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003649
Trond Myklebust2d91e892014-06-30 11:48:46 -04003650 status = lookup_clientid(clientid, cstate, nn);
3651 if (status)
3652 return status;
3653 clp = cstate->clp;
3654
Trond Myklebustd4f04892014-07-29 21:34:36 -04003655 strhashval = ownerstr_hashval(&open->op_owner);
3656 oo = find_openstateowner_str(strhashval, open, clp);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003657 open->op_openowner = oo;
3658 if (!oo) {
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003659 goto new_owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660 }
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003661 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003662 /* Replace unconfirmed owners without checking for replay. */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003663 release_openowner(oo);
3664 open->op_openowner = NULL;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003665 goto new_owner;
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003666 }
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003667 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3668 if (status)
3669 return status;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003670 goto alloc_stateid;
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003671new_owner:
Trond Myklebust13d6f662014-06-30 11:48:45 -04003672 oo = alloc_init_open_stateowner(strhashval, open, cstate);
J. Bruce Fieldsbcf130f2011-10-12 20:44:20 -04003673 if (oo == NULL)
3674 return nfserr_jukebox;
3675 open->op_openowner = oo;
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003676alloc_stateid:
Jeff Laytonb49e0842014-07-29 21:34:11 -04003677 open->op_stp = nfs4_alloc_open_stateid(clp);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04003678 if (!open->op_stp)
3679 return nfserr_jukebox;
Sachin Bhamare8287f002015-04-27 14:50:14 +02003680
3681 if (nfsd4_has_session(cstate) &&
3682 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
3683 open->op_odstate = alloc_clnt_odstate(clp);
3684 if (!open->op_odstate)
3685 return nfserr_jukebox;
3686 }
3687
J. Bruce Fields0f442aa2006-01-18 17:43:34 -08003688 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689}
3690
Al Virob37ad282006-10-19 23:28:59 -07003691static inline __be32
NeilBrown4a6e43e2005-06-23 22:02:50 -07003692nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3693{
3694 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3695 return nfserr_openmode;
3696 else
3697 return nfs_ok;
3698}
3699
Daniel Mackc47d8322011-05-16 16:38:14 +02003700static int share_access_to_flags(u32 share_access)
J. Bruce Fields24a01112010-05-18 20:01:35 -04003701{
J. Bruce Fields24a01112010-05-18 20:01:35 -04003702 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3703}
3704
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003705static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04003706{
3707 struct nfs4_stid *ret;
3708
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04003709 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
J. Bruce Fieldsf459e452011-09-09 09:06:12 -04003710 if (!ret)
3711 return NULL;
3712 return delegstateid(ret);
3713}
3714
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003715static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3716{
3717 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3718 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3719}
3720
Al Virob37ad282006-10-19 23:28:59 -07003721static __be32
J. Bruce Fields41d22662013-03-21 15:49:47 -04003722nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
NeilBrown567d9822005-06-23 22:02:53 -07003723 struct nfs4_delegation **dp)
3724{
3725 int flags;
Al Virob37ad282006-10-19 23:28:59 -07003726 __be32 status = nfserr_bad_stateid;
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003727 struct nfs4_delegation *deleg;
NeilBrown567d9822005-06-23 22:02:53 -07003728
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003729 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
3730 if (deleg == NULL)
NeilBrownc44c5ee2005-06-23 22:02:54 -07003731 goto out;
J. Bruce Fields24a01112010-05-18 20:01:35 -04003732 flags = share_access_to_flags(open->op_share_access);
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04003733 status = nfs4_check_delegmode(deleg, flags);
3734 if (status) {
3735 nfs4_put_stid(&deleg->dl_stid);
3736 goto out;
3737 }
3738 *dp = deleg;
NeilBrownc44c5ee2005-06-23 22:02:54 -07003739out:
J. Bruce Fields8b289b22011-10-19 11:52:12 -04003740 if (!nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07003741 return nfs_ok;
3742 if (status)
3743 return status;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003744 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
NeilBrownc44c5ee2005-06-23 22:02:54 -07003745 return nfs_ok;
NeilBrown567d9822005-06-23 22:02:53 -07003746}
3747
Jeff Laytona46cb7f2014-07-10 14:07:35 -04003748static struct nfs4_ol_stateid *
3749nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003750{
Jeff Laytona46cb7f2014-07-10 14:07:35 -04003751 struct nfs4_ol_stateid *local, *ret = NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04003752 struct nfs4_openowner *oo = open->op_openowner;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003753
Trond Myklebust1d31a252014-07-10 14:07:25 -04003754 spin_lock(&fp->fi_lock);
NeilBrown8beefa22005-06-23 22:03:08 -07003755 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003756 /* ignore lock owners */
3757 if (local->st_stateowner->so_is_open_owner == 0)
3758 continue;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003759 if (local->st_stateowner == &oo->oo_owner) {
Jeff Laytona46cb7f2014-07-10 14:07:35 -04003760 ret = local;
Trond Myklebustd6f2bc52014-07-29 21:34:19 -04003761 atomic_inc(&ret->st_stid.sc_count);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003762 break;
Trond Myklebust1d31a252014-07-10 14:07:25 -04003763 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003764 }
Trond Myklebust1d31a252014-07-10 14:07:25 -04003765 spin_unlock(&fp->fi_lock);
Jeff Laytona46cb7f2014-07-10 14:07:35 -04003766 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767}
3768
J. Bruce Fields21fb4012010-07-28 12:21:23 -04003769static inline int nfs4_access_to_access(u32 nfs4_access)
3770{
3771 int flags = 0;
3772
3773 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
3774 flags |= NFSD_MAY_READ;
3775 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
3776 flags |= NFSD_MAY_WRITE;
3777 return flags;
3778}
3779
Al Virob37ad282006-10-19 23:28:59 -07003780static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07003781nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
3782 struct nfsd4_open *open)
3783{
3784 struct iattr iattr = {
3785 .ia_valid = ATTR_SIZE,
3786 .ia_size = 0,
3787 };
3788 if (!open->op_truncate)
3789 return 0;
3790 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
Al Viro92465852006-01-18 17:43:46 -08003791 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
3793}
3794
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003795static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04003796 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
3797 struct nfsd4_open *open)
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003798{
Trond Myklebustde186432014-07-10 14:07:26 -04003799 struct file *filp = NULL;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003800 __be32 status;
3801 int oflag = nfs4_access_to_omode(open->op_share_access);
3802 int access = nfs4_access_to_access(open->op_share_access);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003803 unsigned char old_access_bmap, old_deny_bmap;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003804
Trond Myklebustde186432014-07-10 14:07:26 -04003805 spin_lock(&fp->fi_lock);
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003806
3807 /*
3808 * Are we trying to set a deny mode that would conflict with
3809 * current access?
3810 */
3811 status = nfs4_file_check_deny(fp, open->op_share_deny);
3812 if (status != nfs_ok) {
3813 spin_unlock(&fp->fi_lock);
3814 goto out;
3815 }
3816
3817 /* set access to the file */
3818 status = nfs4_file_get_access(fp, open->op_share_access);
3819 if (status != nfs_ok) {
3820 spin_unlock(&fp->fi_lock);
3821 goto out;
3822 }
3823
3824 /* Set access bits in stateid */
3825 old_access_bmap = stp->st_access_bmap;
3826 set_access(open->op_share_access, stp);
3827
3828 /* Set new deny mask */
3829 old_deny_bmap = stp->st_deny_bmap;
3830 set_deny(open->op_share_deny, stp);
3831 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
3832
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003833 if (!fp->fi_fds[oflag]) {
Trond Myklebustde186432014-07-10 14:07:26 -04003834 spin_unlock(&fp->fi_lock);
3835 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003836 if (status)
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003837 goto out_put_access;
Trond Myklebustde186432014-07-10 14:07:26 -04003838 spin_lock(&fp->fi_lock);
3839 if (!fp->fi_fds[oflag]) {
3840 fp->fi_fds[oflag] = filp;
3841 filp = NULL;
3842 }
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003843 }
Trond Myklebustde186432014-07-10 14:07:26 -04003844 spin_unlock(&fp->fi_lock);
3845 if (filp)
3846 fput(filp);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003847
3848 status = nfsd4_truncate(rqstp, cur_fh, open);
3849 if (status)
3850 goto out_put_access;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003851out:
3852 return status;
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003853out_put_access:
3854 stp->st_access_bmap = old_access_bmap;
3855 nfs4_file_put_access(fp, open->op_share_access);
3856 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
3857 goto out;
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003858}
3859
Al Virob37ad282006-10-19 23:28:59 -07003860static __be32
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04003861nfs4_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 -07003862{
Al Virob37ad282006-10-19 23:28:59 -07003863 __be32 status;
Arnd Bergmann6ac75362015-05-12 23:31:29 +02003864 unsigned char old_deny_bmap = stp->st_deny_bmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04003866 if (!test_access(open->op_share_access, stp))
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003867 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
Christoph Hellwig7e6a72e2014-06-30 11:48:30 -04003868
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003869 /* test and set deny mode */
3870 spin_lock(&fp->fi_lock);
3871 status = nfs4_file_check_deny(fp, open->op_share_deny);
3872 if (status == nfs_ok) {
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003873 set_deny(open->op_share_deny, stp);
3874 fp->fi_share_deny |=
3875 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
3876 }
3877 spin_unlock(&fp->fi_lock);
3878
3879 if (status != nfs_ok)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881
Jeff Laytonbaeb4ff2014-07-10 14:07:34 -04003882 status = nfsd4_truncate(rqstp, cur_fh, open);
3883 if (status != nfs_ok)
3884 reset_union_bmap_deny(old_deny_bmap, stp);
3885 return status;
3886}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887
Linus Torvalds1da177e2005-04-16 15:20:36 -07003888static void
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05003889nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003890{
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04003891 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003892}
3893
J. Bruce Fields14a24e92010-12-10 19:02:49 -05003894/* Should we give out recallable state?: */
3895static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3896{
3897 if (clp->cl_cb_state == NFSD4_CB_UP)
3898 return true;
3899 /*
3900 * In the sessions case, since we don't have to establish a
3901 * separate connection for callbacks, we assume it's OK
3902 * until we hear otherwise:
3903 */
3904 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3905}
3906
Jeff Laytond564fbe2014-07-16 10:31:58 -04003907static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag)
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003908{
3909 struct file_lock *fl;
3910
3911 fl = locks_alloc_lock();
3912 if (!fl)
3913 return NULL;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003914 fl->fl_lmops = &nfsd_lease_mng_ops;
J. Bruce Fields617588d2011-07-01 15:18:34 -04003915 fl->fl_flags = FL_DELEG;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003916 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3917 fl->fl_end = OFFSET_MAX;
Jeff Laytond564fbe2014-07-16 10:31:58 -04003918 fl->fl_owner = (fl_owner_t)fp;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003919 fl->fl_pid = current->tgid;
J. Bruce Fields22d38c42011-01-31 11:55:12 -05003920 return fl;
3921}
3922
J. Bruce Fields99c41512013-05-21 16:21:25 -04003923static int nfs4_setlease(struct nfs4_delegation *dp)
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003924{
Trond Myklebust11b91642014-07-29 21:34:08 -04003925 struct nfs4_file *fp = dp->dl_stid.sc_file;
Jeff Layton415b96c2014-08-22 12:26:36 -04003926 struct file_lock *fl, *ret;
Jeff Layton417c6622014-07-21 09:34:57 -04003927 struct file *filp;
3928 int status = 0;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003929
Jeff Laytond564fbe2014-07-16 10:31:58 -04003930 fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ);
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05003931 if (!fl)
3932 return -ENOMEM;
Jeff Layton417c6622014-07-21 09:34:57 -04003933 filp = find_readable_file(fp);
3934 if (!filp) {
3935 /* We should always have a readable file here */
3936 WARN_ON_ONCE(1);
3937 return -EBADF;
3938 }
3939 fl->fl_file = filp;
Jeff Layton415b96c2014-08-22 12:26:36 -04003940 ret = fl;
Jeff Laytone6f5c782014-08-22 10:40:25 -04003941 status = vfs_setlease(filp, fl->fl_type, &fl, NULL);
Jeff Layton1c7dd2f2014-08-22 10:55:47 -04003942 if (fl)
Jeff Layton417c6622014-07-21 09:34:57 -04003943 locks_free_lock(fl);
Jeff Layton1c7dd2f2014-08-22 10:55:47 -04003944 if (status)
Jeff Layton417c6622014-07-21 09:34:57 -04003945 goto out_fput;
Benny Halevycdc97502014-05-30 09:09:30 -04003946 spin_lock(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04003947 spin_lock(&fp->fi_lock);
3948 /* Did the lease get broken before we took the lock? */
3949 status = -EAGAIN;
3950 if (fp->fi_had_conflict)
3951 goto out_unlock;
3952 /* Race breaker */
Jeff Layton0c637be2014-08-22 12:05:43 -04003953 if (fp->fi_deleg_file) {
Jeff Layton417c6622014-07-21 09:34:57 -04003954 status = 0;
Jeff Layton67db1032014-12-13 09:11:40 -05003955 ++fp->fi_delegees;
Jeff Layton417c6622014-07-21 09:34:57 -04003956 hash_delegation_locked(dp, fp);
3957 goto out_unlock;
3958 }
Jeff Layton417c6622014-07-21 09:34:57 -04003959 fp->fi_deleg_file = filp;
Jeff Layton67db1032014-12-13 09:11:40 -05003960 fp->fi_delegees = 1;
Benny Halevy931ee562014-05-30 09:09:27 -04003961 hash_delegation_locked(dp, fp);
Jeff Layton417c6622014-07-21 09:34:57 -04003962 spin_unlock(&fp->fi_lock);
Benny Halevycdc97502014-05-30 09:09:30 -04003963 spin_unlock(&state_lock);
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003964 return 0;
Jeff Layton417c6622014-07-21 09:34:57 -04003965out_unlock:
3966 spin_unlock(&fp->fi_lock);
3967 spin_unlock(&state_lock);
3968out_fput:
3969 fput(filp);
J. Bruce Fieldse8730882012-01-23 13:52:01 -05003970 return status;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003971}
3972
Jeff Layton0b266932014-07-25 07:34:25 -04003973static struct nfs4_delegation *
3974nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
Sachin Bhamare8287f002015-04-27 14:50:14 +02003975 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003976{
Jeff Layton0b266932014-07-25 07:34:25 -04003977 int status;
3978 struct nfs4_delegation *dp;
Jeff Layton417c6622014-07-21 09:34:57 -04003979
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003980 if (fp->fi_had_conflict)
Jeff Layton0b266932014-07-25 07:34:25 -04003981 return ERR_PTR(-EAGAIN);
3982
Sachin Bhamare8287f002015-04-27 14:50:14 +02003983 dp = alloc_init_deleg(clp, fh, odstate);
Jeff Layton0b266932014-07-25 07:34:25 -04003984 if (!dp)
3985 return ERR_PTR(-ENOMEM);
3986
J. Bruce Fieldsbf7bd3e2013-08-15 16:55:26 -04003987 get_nfs4_file(fp);
Benny Halevycdc97502014-05-30 09:09:30 -04003988 spin_lock(&state_lock);
Jeff Layton417c6622014-07-21 09:34:57 -04003989 spin_lock(&fp->fi_lock);
Trond Myklebust11b91642014-07-29 21:34:08 -04003990 dp->dl_stid.sc_file = fp;
Jeff Layton0c637be2014-08-22 12:05:43 -04003991 if (!fp->fi_deleg_file) {
Jeff Layton417c6622014-07-21 09:34:57 -04003992 spin_unlock(&fp->fi_lock);
3993 spin_unlock(&state_lock);
Jeff Layton0b266932014-07-25 07:34:25 -04003994 status = nfs4_setlease(dp);
3995 goto out;
Jeff Layton417c6622014-07-21 09:34:57 -04003996 }
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05003997 if (fp->fi_had_conflict) {
Jeff Layton417c6622014-07-21 09:34:57 -04003998 status = -EAGAIN;
3999 goto out_unlock;
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -05004000 }
Jeff Layton67db1032014-12-13 09:11:40 -05004001 ++fp->fi_delegees;
Benny Halevy931ee562014-05-30 09:09:27 -04004002 hash_delegation_locked(dp, fp);
Jeff Layton0b266932014-07-25 07:34:25 -04004003 status = 0;
Jeff Layton417c6622014-07-21 09:34:57 -04004004out_unlock:
4005 spin_unlock(&fp->fi_lock);
Benny Halevycdc97502014-05-30 09:09:30 -04004006 spin_unlock(&state_lock);
Jeff Layton0b266932014-07-25 07:34:25 -04004007out:
4008 if (status) {
Sachin Bhamare8287f002015-04-27 14:50:14 +02004009 put_clnt_odstate(dp->dl_clnt_odstate);
Trond Myklebust60116952014-07-29 21:34:06 -04004010 nfs4_put_stid(&dp->dl_stid);
Jeff Layton0b266932014-07-25 07:34:25 -04004011 return ERR_PTR(status);
4012 }
4013 return dp;
J. Bruce Fieldsedab9782011-01-31 17:58:10 -05004014}
4015
Benny Halevy4aa89132012-02-21 14:16:44 -08004016static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
4017{
4018 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4019 if (status == -EAGAIN)
4020 open->op_why_no_deleg = WND4_CONTENTION;
4021 else {
4022 open->op_why_no_deleg = WND4_RESOURCE;
4023 switch (open->op_deleg_want) {
4024 case NFS4_SHARE_WANT_READ_DELEG:
4025 case NFS4_SHARE_WANT_WRITE_DELEG:
4026 case NFS4_SHARE_WANT_ANY_DELEG:
4027 break;
4028 case NFS4_SHARE_WANT_CANCEL:
4029 open->op_why_no_deleg = WND4_CANCELLED;
4030 break;
4031 case NFS4_SHARE_WANT_NO_DELEG:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004032 WARN_ON_ONCE(1);
Benny Halevy4aa89132012-02-21 14:16:44 -08004033 }
4034 }
4035}
4036
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037/*
4038 * Attempt to hand out a delegation.
J. Bruce Fields99c41512013-05-21 16:21:25 -04004039 *
4040 * Note we don't support write delegations, and won't until the vfs has
4041 * proper support for them.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042 */
4043static void
Jeff Layton4cf59222014-07-25 07:34:24 -04004044nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
4045 struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004046{
4047 struct nfs4_delegation *dp;
Jeff Layton4cf59222014-07-25 07:34:24 -04004048 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
4049 struct nfs4_client *clp = stp->st_stid.sc_client;
J. Bruce Fields14a24e92010-12-10 19:02:49 -05004050 int cb_up;
J. Bruce Fields99c41512013-05-21 16:21:25 -04004051 int status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004052
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004053 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
NeilBrown7b190fe2005-06-23 22:03:23 -07004054 open->op_recall = 0;
4055 switch (open->op_claim_type) {
4056 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fields2bf23872010-03-08 12:37:27 -05004057 if (!cb_up)
NeilBrown7b190fe2005-06-23 22:03:23 -07004058 open->op_recall = 1;
J. Bruce Fields99c41512013-05-21 16:21:25 -04004059 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
4060 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004061 break;
4062 case NFS4_OPEN_CLAIM_NULL:
Ming Chened47b062014-01-09 21:26:10 +00004063 case NFS4_OPEN_CLAIM_FH:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004064 /*
4065 * Let's not give out any delegations till everyone's
4066 * had the chance to reclaim theirs....
4067 */
Jeff Layton4cf59222014-07-25 07:34:24 -04004068 if (locks_in_grace(clp->net))
J. Bruce Fields99c41512013-05-21 16:21:25 -04004069 goto out_no_deleg;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004070 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
J. Bruce Fields99c41512013-05-21 16:21:25 -04004071 goto out_no_deleg;
Steve Dickson9a0590a2013-05-15 14:51:49 -04004072 /*
4073 * Also, if the file was opened for write or
4074 * create, there's a good chance the client's
4075 * about to write to it, resulting in an
4076 * immediate recall (since we don't support
4077 * write delegations):
4078 */
NeilBrown7b190fe2005-06-23 22:03:23 -07004079 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
J. Bruce Fields99c41512013-05-21 16:21:25 -04004080 goto out_no_deleg;
4081 if (open->op_create == NFS4_OPEN_CREATE)
4082 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004083 break;
4084 default:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004085 goto out_no_deleg;
NeilBrown7b190fe2005-06-23 22:03:23 -07004086 }
Sachin Bhamare8287f002015-04-27 14:50:14 +02004087 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
Jeff Layton0b266932014-07-25 07:34:25 -04004088 if (IS_ERR(dp))
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004089 goto out_no_deleg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004090
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004091 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004092
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004093 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04004094 STATEID_VAL(&dp->dl_stid.sc_stateid));
J. Bruce Fields99c41512013-05-21 16:21:25 -04004095 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
Trond Myklebust67cb1272014-07-29 21:34:17 -04004096 nfs4_put_stid(&dp->dl_stid);
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004097 return;
J. Bruce Fieldsdd239cc2011-01-31 17:14:55 -05004098out_no_deleg:
J. Bruce Fields99c41512013-05-21 16:21:25 -04004099 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
4100 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04004101 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
J. Bruce Fields99c41512013-05-21 16:21:25 -04004102 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
J. Bruce Fieldsd08d32e2013-06-21 11:05:32 -04004103 open->op_recall = 1;
4104 }
J. Bruce Fields99c41512013-05-21 16:21:25 -04004105
4106 /* 4.1 client asking for a delegation? */
4107 if (open->op_deleg_want)
4108 nfsd4_open_deleg_none_ext(open, status);
4109 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110}
4111
Benny Halevye27f49c2012-02-21 14:16:54 -08004112static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
4113 struct nfs4_delegation *dp)
4114{
4115 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
4116 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4117 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4118 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
4119 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
4120 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4121 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4122 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
4123 }
4124 /* Otherwise the client must be confused wanting a delegation
4125 * it already has, therefore we don't return
4126 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4127 */
4128}
4129
Al Virob37ad282006-10-19 23:28:59 -07004130__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07004131nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
4132{
Andy Adamson66689582009-04-03 08:28:45 +03004133 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004134 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004135 struct nfs4_file *fp = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004136 struct nfs4_ol_stateid *stp = NULL;
NeilBrown567d9822005-06-23 22:02:53 -07004137 struct nfs4_delegation *dp = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004138 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004139
Linus Torvalds1da177e2005-04-16 15:20:36 -07004140 /*
4141 * Lookup file; if found, lookup stateid and check open request,
4142 * and check for delegations in the process of being recalled.
4143 * If not found, create the nfs4_file struct
4144 */
Jeff Laytonf9c00c32014-07-23 16:17:41 -04004145 fp = find_or_add_file(open->op_file, &current_fh->fh_handle);
Trond Myklebust950e0112014-06-30 11:48:31 -04004146 if (fp != open->op_file) {
J. Bruce Fields41d22662013-03-21 15:49:47 -04004147 status = nfs4_check_deleg(cl, open, &dp);
NeilBrownc44c5ee2005-06-23 22:02:54 -07004148 if (status)
4149 goto out;
Jeff Laytona46cb7f2014-07-10 14:07:35 -04004150 stp = nfsd4_find_existing_open(fp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004151 } else {
Trond Myklebust950e0112014-06-30 11:48:31 -04004152 open->op_file = NULL;
NeilBrownc44c5ee2005-06-23 22:02:54 -07004153 status = nfserr_bad_stateid;
J. Bruce Fields8b289b22011-10-19 11:52:12 -04004154 if (nfsd4_is_deleg_cur(open))
NeilBrownc44c5ee2005-06-23 22:02:54 -07004155 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004156 }
4157
4158 /*
4159 * OPEN the file, or upgrade an existing OPEN.
4160 * If truncate fails, the OPEN fails.
4161 */
4162 if (stp) {
4163 /* Stateid was found, this is an OPEN upgrade */
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04004164 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004165 if (status)
4166 goto out;
4167 } else {
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04004168 stp = open->op_stp;
4169 open->op_stp = NULL;
J. Bruce Fields996e0932011-10-17 11:14:48 -04004170 init_open_stateid(stp, fp, open);
Jeff Layton6eb3a1d2014-07-10 14:07:31 -04004171 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
4172 if (status) {
4173 release_open_stateid(stp);
4174 goto out;
4175 }
Sachin Bhamare8287f002015-04-27 14:50:14 +02004176
4177 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
4178 open->op_odstate);
4179 if (stp->st_clnt_odstate == open->op_odstate)
4180 open->op_odstate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004181 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004182 update_stateid(&stp->st_stid.sc_stateid);
4183 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004184
Benny Halevyd24433c2012-02-16 20:57:17 +02004185 if (nfsd4_has_session(&resp->cstate)) {
Benny Halevyd24433c2012-02-16 20:57:17 +02004186 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
4187 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4188 open->op_why_no_deleg = WND4_NOT_WANTED;
4189 goto nodeleg;
4190 }
4191 }
4192
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193 /*
4194 * Attempt to hand out a delegation. No error return, because the
4195 * OPEN succeeds even if we fail.
4196 */
Jeff Layton4cf59222014-07-25 07:34:24 -04004197 nfs4_open_delegation(current_fh, open, stp);
Benny Halevyd24433c2012-02-16 20:57:17 +02004198nodeleg:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004199 status = nfs_ok;
4200
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004201 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004202 STATEID_VAL(&stp->st_stid.sc_stateid));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004203out:
Benny Halevyd24433c2012-02-16 20:57:17 +02004204 /* 4.1 client trying to upgrade/downgrade delegation? */
4205 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
Benny Halevye27f49c2012-02-21 14:16:54 -08004206 open->op_deleg_want)
4207 nfsd4_deleg_xgrade_none_ext(open, dp);
Benny Halevyd24433c2012-02-16 20:57:17 +02004208
NeilBrown13cd2182005-06-23 22:03:10 -07004209 if (fp)
4210 put_nfs4_file(fp);
NeilBrown37515172005-07-07 17:59:16 -07004211 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fields1255a8f2012-03-06 14:35:16 -05004212 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004213 /*
4214 * To finish the open response, we just need to set the rflags.
4215 */
4216 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004217 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
Andy Adamson66689582009-04-03 08:28:45 +03004218 !nfsd4_has_session(&resp->cstate))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004219 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
Trond Myklebustdcd94cc2014-07-29 21:34:18 -04004220 if (dp)
4221 nfs4_put_stid(&dp->dl_stid);
Trond Myklebustd6f2bc52014-07-29 21:34:19 -04004222 if (stp)
4223 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004224
4225 return status;
4226}
4227
Jeff Layton58fb12e2014-07-29 21:34:27 -04004228void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
Jeff Layton42297892015-03-23 10:53:44 -04004229 struct nfsd4_open *open)
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004230{
4231 if (open->op_openowner) {
Jeff Laytond3134b12014-07-29 21:34:32 -04004232 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004233
Jeff Laytond3134b12014-07-29 21:34:32 -04004234 nfsd4_cstate_assign_replay(cstate, so);
4235 nfs4_put_stateowner(so);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004236 }
J. Bruce Fields32513b42011-10-13 16:00:16 -04004237 if (open->op_file)
Jeff Layton5b095e92014-10-23 08:01:02 -04004238 kmem_cache_free(file_slab, open->op_file);
J. Bruce Fields4cdc9512011-10-17 15:57:47 -04004239 if (open->op_stp)
Trond Myklebust60116952014-07-29 21:34:06 -04004240 nfs4_put_stid(&open->op_stp->st_stid);
Sachin Bhamare8287f002015-04-27 14:50:14 +02004241 if (open->op_odstate)
4242 kmem_cache_free(odstate_slab, open->op_odstate);
J. Bruce Fieldsd29b20c2011-10-13 15:12:59 -04004243}
4244
Al Virob37ad282006-10-19 23:28:59 -07004245__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08004246nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4247 clientid_t *clid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004248{
4249 struct nfs4_client *clp;
Al Virob37ad282006-10-19 23:28:59 -07004250 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03004251 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004252
Linus Torvalds1da177e2005-04-16 15:20:36 -07004253 dprintk("process_renew(%08x/%08x): starting\n",
4254 clid->cl_boot, clid->cl_id);
Jeff Layton4b24ca72014-06-30 11:48:44 -04004255 status = lookup_clientid(clid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05004256 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004257 goto out;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004258 clp = cstate->clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004259 status = nfserr_cb_path_down;
NeilBrownea1da632005-06-23 22:04:17 -07004260 if (!list_empty(&clp->cl_delegations)
J. Bruce Fields77a35692010-04-30 18:51:44 -04004261 && clp->cl_cb_state != NFSD4_CB_UP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004262 goto out;
4263 status = nfs_ok;
4264out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004265 return status;
4266}
4267
Jeff Layton7f5ef2e2014-09-12 16:40:21 -04004268void
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03004269nfsd4_end_grace(struct nfsd_net *nn)
NeilBrowna76b4312005-06-23 22:04:01 -07004270{
Jeff Layton33dcc482012-04-10 11:08:48 -04004271 /* do nothing if grace period already ended */
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04004272 if (nn->grace_ended)
Jeff Layton33dcc482012-04-10 11:08:48 -04004273 return;
4274
NeilBrowna76b4312005-06-23 22:04:01 -07004275 dprintk("NFSD: end of grace period\n");
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04004276 nn->grace_ended = true;
J. Bruce Fields70b28232014-09-16 17:37:32 -04004277 /*
4278 * If the server goes down again right now, an NFSv4
4279 * client will still be allowed to reclaim after it comes back up,
4280 * even if it hasn't yet had a chance to reclaim state this time.
4281 *
4282 */
Jeff Layton919b8042014-09-12 16:40:20 -04004283 nfsd4_record_grace_done(nn);
J. Bruce Fields70b28232014-09-16 17:37:32 -04004284 /*
4285 * At this point, NFSv4 clients can still reclaim. But if the
4286 * server crashes, any that have not yet reclaimed will be out
4287 * of luck on the next boot.
4288 *
4289 * (NFSv4.1+ clients are considered to have reclaimed once they
4290 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4291 * have reclaimed after their first OPEN.)
4292 */
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04004293 locks_end_grace(&nn->nfsd4_manager);
J. Bruce Fields70b28232014-09-16 17:37:32 -04004294 /*
4295 * At this point, and once lockd and/or any other containers
4296 * exit their grace period, further reclaims will fail and
4297 * regular locking can resume.
4298 */
NeilBrowna76b4312005-06-23 22:04:01 -07004299}
4300
NeilBrownfd39ca92005-06-23 22:04:03 -07004301static time_t
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004302nfs4_laundromat(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004303{
4304 struct nfs4_client *clp;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004305 struct nfs4_openowner *oo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004306 struct nfs4_delegation *dp;
Jeff Layton217526e2014-07-30 08:27:11 -04004307 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004308 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03004309 time_t cutoff = get_seconds() - nn->nfsd4_lease;
Jeff Laytona832e7a2014-05-30 09:09:26 -04004310 time_t t, new_timeo = nn->nfsd4_lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004311
Linus Torvalds1da177e2005-04-16 15:20:36 -07004312 dprintk("NFSD: laundromat service - starting\n");
Stanislav Kinsbursky12760c62012-11-14 18:22:12 +03004313 nfsd4_end_grace(nn);
Benny Halevy36acb662010-05-12 00:13:04 +03004314 INIT_LIST_HEAD(&reaplist);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03004315 spin_lock(&nn->client_lock);
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03004316 list_for_each_safe(pos, next, &nn->client_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004317 clp = list_entry(pos, struct nfs4_client, cl_lru);
4318 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
4319 t = clp->cl_time - cutoff;
Jeff Laytona832e7a2014-05-30 09:09:26 -04004320 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004321 break;
4322 }
J. Bruce Fields221a6872013-04-01 22:23:49 -04004323 if (mark_client_expired_locked(clp)) {
Benny Halevyd7682982010-05-12 00:13:54 +03004324 dprintk("NFSD: client in use (clientid %08x)\n",
4325 clp->cl_clientid.cl_id);
4326 continue;
4327 }
Trond Myklebust4864af92014-07-30 08:27:03 -04004328 list_add(&clp->cl_lru, &reaplist);
Benny Halevy36acb662010-05-12 00:13:04 +03004329 }
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03004330 spin_unlock(&nn->client_lock);
Benny Halevy36acb662010-05-12 00:13:04 +03004331 list_for_each_safe(pos, next, &reaplist) {
4332 clp = list_entry(pos, struct nfs4_client, cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333 dprintk("NFSD: purging unused client (clientid %08x)\n",
4334 clp->cl_clientid.cl_id);
Trond Myklebust4864af92014-07-30 08:27:03 -04004335 list_del_init(&clp->cl_lru);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004336 expire_client(clp);
4337 }
Benny Halevycdc97502014-05-30 09:09:30 -04004338 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04004339 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004340 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Stanislav Kinsbursky4e37a7c22012-11-26 15:22:03 +03004341 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
4342 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004343 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04004344 t = dp->dl_time - cutoff;
4345 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004346 break;
4347 }
Jeff Layton42690672014-07-25 07:34:20 -04004348 unhash_delegation_locked(dp);
4349 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004350 }
Benny Halevycdc97502014-05-30 09:09:30 -04004351 spin_unlock(&state_lock);
Jeff Layton2d4a5322014-07-25 07:34:21 -04004352 while (!list_empty(&reaplist)) {
4353 dp = list_first_entry(&reaplist, struct nfs4_delegation,
4354 dl_recall_lru);
4355 list_del_init(&dp->dl_recall_lru);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004356 revoke_delegation(dp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004357 }
Jeff Layton217526e2014-07-30 08:27:11 -04004358
4359 spin_lock(&nn->client_lock);
4360 while (!list_empty(&nn->close_lru)) {
4361 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
4362 oo_close_lru);
4363 if (time_after((unsigned long)oo->oo_time,
4364 (unsigned long)cutoff)) {
Jeff Laytona832e7a2014-05-30 09:09:26 -04004365 t = oo->oo_time - cutoff;
4366 new_timeo = min(new_timeo, t);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004367 break;
4368 }
Jeff Layton217526e2014-07-30 08:27:11 -04004369 list_del_init(&oo->oo_close_lru);
4370 stp = oo->oo_last_closed_stid;
4371 oo->oo_last_closed_stid = NULL;
4372 spin_unlock(&nn->client_lock);
4373 nfs4_put_stid(&stp->st_stid);
4374 spin_lock(&nn->client_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004375 }
Jeff Layton217526e2014-07-30 08:27:11 -04004376 spin_unlock(&nn->client_lock);
4377
Jeff Laytona832e7a2014-05-30 09:09:26 -04004378 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
Jeff Laytona832e7a2014-05-30 09:09:26 -04004379 return new_timeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004380}
4381
Harvey Harrisona254b242008-02-20 12:49:00 -08004382static struct workqueue_struct *laundry_wq;
4383static void laundromat_main(struct work_struct *);
Harvey Harrisona254b242008-02-20 12:49:00 -08004384
4385static void
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004386laundromat_main(struct work_struct *laundry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387{
4388 time_t t;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004389 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
4390 work);
4391 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
4392 laundromat_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004393
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004394 t = nfs4_laundromat(nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004395 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03004396 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004397}
4398
Jeff Layton8fcd4612015-07-30 06:57:46 -04004399static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
NeilBrownf8816512005-07-07 17:59:25 -07004400{
Jeff Layton8fcd4612015-07-30 06:57:46 -04004401 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004402 return nfserr_bad_stateid;
4403 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004404}
4405
Linus Torvalds1da177e2005-04-16 15:20:36 -07004406static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04004407access_permit_read(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408{
Jeff Layton82c5ff12012-05-11 09:45:13 -04004409 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
4410 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
4411 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004412}
4413
4414static inline int
Jeff Layton82c5ff12012-05-11 09:45:13 -04004415access_permit_write(struct nfs4_ol_stateid *stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416{
Jeff Layton82c5ff12012-05-11 09:45:13 -04004417 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
4418 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004419}
4420
4421static
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004422__be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423{
Al Virob37ad282006-10-19 23:28:59 -07004424 __be32 status = nfserr_openmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004425
J. Bruce Fields02921912010-07-29 15:16:59 -04004426 /* For lock stateid's, we test the parent open, not the lock: */
4427 if (stp->st_openstp)
4428 stp = stp->st_openstp;
Jeff Layton82c5ff12012-05-11 09:45:13 -04004429 if ((flags & WR_STATE) && !access_permit_write(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004430 goto out;
Jeff Layton82c5ff12012-05-11 09:45:13 -04004431 if ((flags & RD_STATE) && !access_permit_read(stp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004432 goto out;
4433 status = nfs_ok;
4434out:
4435 return status;
4436}
4437
Al Virob37ad282006-10-19 23:28:59 -07004438static inline __be32
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004439check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004440{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08004441 if (ONE_STATEID(stateid) && (flags & RD_STATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004442 return nfs_ok;
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004443 else if (locks_in_grace(net)) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -03004444 /* Answer in remaining cases depends on existence of
Linus Torvalds1da177e2005-04-16 15:20:36 -07004445 * conflicting state; so we must wait out the grace period. */
4446 return nfserr_grace;
4447 } else if (flags & WR_STATE)
4448 return nfs4_share_conflict(current_fh,
4449 NFS4_SHARE_DENY_WRITE);
4450 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4451 return nfs4_share_conflict(current_fh,
4452 NFS4_SHARE_DENY_READ);
4453}
4454
4455/*
4456 * Allow READ/WRITE during grace period on recovered state only for files
4457 * that are not able to provide mandatory locking.
4458 */
4459static inline int
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004460grace_disallows_io(struct net *net, struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004461{
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004462 return locks_in_grace(net) && mandatory_lock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004463}
4464
J. Bruce Fields81b82962011-08-23 11:03:29 -04004465/* Returns true iff a is later than b: */
4466static bool stateid_generation_after(stateid_t *a, stateid_t *b)
4467{
Jim Rees1a9357f2013-05-17 17:33:00 -04004468 return (s32)(a->si_generation - b->si_generation) > 0;
J. Bruce Fields81b82962011-08-23 11:03:29 -04004469}
4470
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004471static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
J. Bruce Fields0836f582008-01-26 19:08:12 -05004472{
Andy Adamson66689582009-04-03 08:28:45 +03004473 /*
4474 * When sessions are used the stateid generation number is ignored
4475 * when it is zero.
4476 */
J. Bruce Fields28dde242011-08-22 10:07:12 -04004477 if (has_session && in->si_generation == 0)
J. Bruce Fields81b82962011-08-23 11:03:29 -04004478 return nfs_ok;
4479
4480 if (in->si_generation == ref->si_generation)
4481 return nfs_ok;
Andy Adamson66689582009-04-03 08:28:45 +03004482
J. Bruce Fields0836f582008-01-26 19:08:12 -05004483 /* If the client sends us a stateid from the future, it's buggy: */
J. Bruce Fields81b82962011-08-23 11:03:29 -04004484 if (stateid_generation_after(in, ref))
J. Bruce Fields0836f582008-01-26 19:08:12 -05004485 return nfserr_bad_stateid;
4486 /*
J. Bruce Fields81b82962011-08-23 11:03:29 -04004487 * However, we could see a stateid from the past, even from a
4488 * non-buggy client. For example, if the client sends a lock
4489 * while some IO is outstanding, the lock may bump si_generation
4490 * while the IO is still in flight. The client could avoid that
4491 * situation by waiting for responses on all the IO requests,
4492 * but better performance may result in retrying IO that
4493 * receives an old_stateid error if requests are rarely
4494 * reordered in flight:
J. Bruce Fields0836f582008-01-26 19:08:12 -05004495 */
J. Bruce Fields81b82962011-08-23 11:03:29 -04004496 return nfserr_old_stateid;
J. Bruce Fields0836f582008-01-26 19:08:12 -05004497}
4498
Christoph Hellwigebe9cb32015-04-28 15:41:15 +02004499static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
4500{
4501 if (ols->st_stateowner->so_is_open_owner &&
4502 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4503 return nfserr_bad_stateid;
4504 return nfs_ok;
4505}
4506
Chuck Lever7df302f2012-05-29 13:56:37 -04004507static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
Bryan Schumaker17456802011-07-13 10:50:48 -04004508{
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04004509 struct nfs4_stid *s;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004510 __be32 status = nfserr_bad_stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04004511
Chuck Lever7df302f2012-05-29 13:56:37 -04004512 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
Jeff Layton1af71cc2014-07-29 21:34:14 -04004513 return status;
Chuck Lever7df302f2012-05-29 13:56:37 -04004514 /* Client debugging aid. */
4515 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
4516 char addr_str[INET6_ADDRSTRLEN];
4517 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
4518 sizeof(addr_str));
4519 pr_warn_ratelimited("NFSD: client %s testing state ID "
4520 "with incorrect client ID\n", addr_str);
Jeff Layton1af71cc2014-07-29 21:34:14 -04004521 return status;
Chuck Lever7df302f2012-05-29 13:56:37 -04004522 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004523 spin_lock(&cl->cl_lock);
4524 s = find_stateid_locked(cl, stateid);
J. Bruce Fields97b7e3b2011-09-09 11:26:58 -04004525 if (!s)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004526 goto out_unlock;
J. Bruce Fields36279ac2011-09-26 12:53:00 -04004527 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
Bryan Schumaker17456802011-07-13 10:50:48 -04004528 if (status)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004529 goto out_unlock;
J. Bruce Fields23340032013-04-09 17:42:28 -04004530 switch (s->sc_type) {
4531 case NFS4_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004532 status = nfs_ok;
4533 break;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004534 case NFS4_REVOKED_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004535 status = nfserr_deleg_revoked;
4536 break;
J. Bruce Fields23340032013-04-09 17:42:28 -04004537 case NFS4_OPEN_STID:
4538 case NFS4_LOCK_STID:
Christoph Hellwigebe9cb32015-04-28 15:41:15 +02004539 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
Jeff Layton1af71cc2014-07-29 21:34:14 -04004540 break;
J. Bruce Fields23340032013-04-09 17:42:28 -04004541 default:
4542 printk("unknown stateid type %x\n", s->sc_type);
Trond Myklebustb0fc29d2014-07-16 10:31:59 -04004543 /* Fallthrough */
J. Bruce Fields23340032013-04-09 17:42:28 -04004544 case NFS4_CLOSED_STID:
Trond Myklebustb0fc29d2014-07-16 10:31:59 -04004545 case NFS4_CLOSED_DELEG_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004546 status = nfserr_bad_stateid;
J. Bruce Fields23340032013-04-09 17:42:28 -04004547 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004548out_unlock:
4549 spin_unlock(&cl->cl_lock);
4550 return status;
Bryan Schumaker17456802011-07-13 10:50:48 -04004551}
4552
Christoph Hellwigcd61c522014-08-14 08:44:57 +02004553__be32
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004554nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
4555 stateid_t *stateid, unsigned char typemask,
4556 struct nfs4_stid **s, struct nfsd_net *nn)
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004557{
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04004558 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004559
4560 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4561 return nfserr_bad_stateid;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004562 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004563 if (status == nfserr_stale_clientid) {
Jeff Layton4b24ca72014-06-30 11:48:44 -04004564 if (cstate->session)
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004565 return nfserr_bad_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004566 return nfserr_stale_stateid;
Trond Myklebusta8a7c672014-03-29 14:43:38 -04004567 }
J. Bruce Fields0eb6f202013-03-12 17:36:17 -04004568 if (status)
4569 return status;
Jeff Layton4b24ca72014-06-30 11:48:44 -04004570 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004571 if (!*s)
4572 return nfserr_bad_stateid;
4573 return nfs_ok;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004574}
4575
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004576static struct file *
4577nfs4_find_file(struct nfs4_stid *s, int flags)
4578{
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004579 if (!s)
4580 return NULL;
4581
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004582 switch (s->sc_type) {
4583 case NFS4_DELEG_STID:
4584 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
4585 return NULL;
4586 return get_file(s->sc_file->fi_deleg_file);
4587 case NFS4_OPEN_STID:
4588 case NFS4_LOCK_STID:
4589 if (flags & RD_STATE)
4590 return find_readable_file(s->sc_file);
4591 else
4592 return find_writeable_file(s->sc_file);
4593 break;
4594 }
4595
4596 return NULL;
4597}
4598
4599static __be32
4600nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags)
4601{
4602 __be32 status;
4603
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004604 status = nfsd4_check_openowner_confirmed(ols);
4605 if (status)
4606 return status;
4607 return nfs4_check_openmode(ols, flags);
4608}
4609
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004610static __be32
4611nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
4612 struct file **filpp, bool *tmp_file, int flags)
4613{
4614 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
4615 struct file *file;
4616 __be32 status;
4617
4618 file = nfs4_find_file(s, flags);
4619 if (file) {
4620 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
4621 acc | NFSD_MAY_OWNER_OVERRIDE);
4622 if (status) {
4623 fput(file);
4624 return status;
4625 }
4626
4627 *filpp = file;
4628 } else {
4629 status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp);
4630 if (status)
4631 return status;
4632
4633 if (tmp_file)
4634 *tmp_file = true;
4635 }
4636
4637 return 0;
4638}
4639
Linus Torvalds1da177e2005-04-16 15:20:36 -07004640/*
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004641 * Checks for stateid operations
4642 */
Al Virob37ad282006-10-19 23:28:59 -07004643__be32
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004644nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
4645 struct nfsd4_compound_state *cstate, stateid_t *stateid,
4646 int flags, struct file **filpp, bool *tmp_file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004647{
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004648 struct svc_fh *fhp = &cstate->current_fh;
4649 struct inode *ino = d_inode(fhp->fh_dentry);
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004650 struct net *net = SVC_NET(rqstp);
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004651 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004652 struct nfs4_stid *s = NULL;
Al Virob37ad282006-10-19 23:28:59 -07004653 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004654
Linus Torvalds1da177e2005-04-16 15:20:36 -07004655 if (filpp)
4656 *filpp = NULL;
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004657 if (tmp_file)
4658 *tmp_file = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004659
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04004660 if (grace_disallows_io(net, ino))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004661 return nfserr_grace;
4662
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004663 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
4664 status = check_special_stateids(net, fhp, stateid, flags);
4665 goto done;
4666 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004667
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004668 status = nfsd4_lookup_stateid(cstate, stateid,
Jeff Laytondb24b3b2014-06-30 11:48:36 -04004669 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004670 &s, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004671 if (status)
Trond Myklebustc2d1d6a2014-07-30 08:27:25 -04004672 return status;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004673 status = check_stateid_generation(stateid, &s->sc_stateid,
4674 nfsd4_has_session(cstate));
J. Bruce Fields69064a22011-09-09 11:54:57 -04004675 if (status)
4676 goto out;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004677
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004678 switch (s->sc_type) {
4679 case NFS4_DELEG_STID:
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004680 status = nfs4_check_delegmode(delegstateid(s), flags);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004681 break;
4682 case NFS4_OPEN_STID:
4683 case NFS4_LOCK_STID:
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004684 status = nfs4_check_olstateid(fhp, openlockstateid(s), flags);
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004685 break;
4686 default:
Trond Myklebust14bcab12014-04-18 14:44:07 -04004687 status = nfserr_bad_stateid;
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004688 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004689 }
Jeff Layton8fcd4612015-07-30 06:57:46 -04004690 if (status)
4691 goto out;
4692 status = nfs4_check_fh(fhp, s);
Christoph Hellwiga0649b22015-06-18 16:44:59 +02004693
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004694done:
4695 if (!status && filpp)
4696 status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004697out:
Christoph Hellwigaf90f702015-06-18 16:45:00 +02004698 if (s)
4699 nfs4_put_stid(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004700 return status;
4701}
4702
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004703/*
Bryan Schumaker17456802011-07-13 10:50:48 -04004704 * Test if the stateid is valid
4705 */
4706__be32
4707nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4708 struct nfsd4_test_stateid *test_stateid)
4709{
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004710 struct nfsd4_test_stateid_id *stateid;
4711 struct nfs4_client *cl = cstate->session->se_client;
4712
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004713 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
Chuck Lever7df302f2012-05-29 13:56:37 -04004714 stateid->ts_id_status =
4715 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004716
Bryan Schumaker17456802011-07-13 10:50:48 -04004717 return nfs_ok;
4718}
4719
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004720__be32
4721nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4722 struct nfsd4_free_stateid *free_stateid)
4723{
4724 stateid_t *stateid = &free_stateid->fr_stateid;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004725 struct nfs4_stid *s;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004726 struct nfs4_delegation *dp;
Jeff Laytonfc5a96c2014-07-29 21:34:40 -04004727 struct nfs4_ol_stateid *stp;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004728 struct nfs4_client *cl = cstate->session->se_client;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004729 __be32 ret = nfserr_bad_stateid;
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004730
Jeff Layton1af71cc2014-07-29 21:34:14 -04004731 spin_lock(&cl->cl_lock);
4732 s = find_stateid_locked(cl, stateid);
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004733 if (!s)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004734 goto out_unlock;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004735 switch (s->sc_type) {
4736 case NFS4_DELEG_STID:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004737 ret = nfserr_locks_held;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004738 break;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004739 case NFS4_OPEN_STID:
Jeff Layton1af71cc2014-07-29 21:34:14 -04004740 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4741 if (ret)
4742 break;
4743 ret = nfserr_locks_held;
4744 break;
J. Bruce Fields2da1cec2011-09-16 18:56:20 -04004745 case NFS4_LOCK_STID:
4746 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
4747 if (ret)
Jeff Layton1af71cc2014-07-29 21:34:14 -04004748 break;
Jeff Laytonfc5a96c2014-07-29 21:34:40 -04004749 stp = openlockstateid(s);
4750 ret = nfserr_locks_held;
4751 if (check_for_locks(stp->st_stid.sc_file,
4752 lockowner(stp->st_stateowner)))
4753 break;
4754 unhash_lock_stateid(stp);
Jeff Layton1af71cc2014-07-29 21:34:14 -04004755 spin_unlock(&cl->cl_lock);
Jeff Laytonfc5a96c2014-07-29 21:34:40 -04004756 nfs4_put_stid(s);
4757 ret = nfs_ok;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004758 goto out;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004759 case NFS4_REVOKED_DELEG_STID:
4760 dp = delegstateid(s);
Jeff Layton2d4a5322014-07-25 07:34:21 -04004761 list_del_init(&dp->dl_recall_lru);
4762 spin_unlock(&cl->cl_lock);
Trond Myklebust60116952014-07-29 21:34:06 -04004763 nfs4_put_stid(s);
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004764 ret = nfs_ok;
Jeff Layton1af71cc2014-07-29 21:34:14 -04004765 goto out;
4766 /* Default falls through and returns nfserr_bad_stateid */
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004767 }
Jeff Layton1af71cc2014-07-29 21:34:14 -04004768out_unlock:
4769 spin_unlock(&cl->cl_lock);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004770out:
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04004771 return ret;
4772}
4773
NeilBrown4c4cd222005-07-07 17:59:27 -07004774static inline int
4775setlkflg (int type)
4776{
4777 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
4778 RD_STATE : WR_STATE;
4779}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004780
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004781static __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 -04004782{
4783 struct svc_fh *current_fh = &cstate->current_fh;
4784 struct nfs4_stateowner *sop = stp->st_stateowner;
4785 __be32 status;
4786
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004787 status = nfsd4_check_seqid(cstate, sop, seqid);
4788 if (status)
4789 return status;
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004790 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
4791 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004792 /*
4793 * "Closed" stateid's exist *only* to return
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04004794 * nfserr_replay_me from the previous step, and
4795 * revoked delegations are kept only for free_stateid.
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004796 */
4797 return nfserr_bad_stateid;
4798 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
4799 if (status)
4800 return status;
Jeff Layton8fcd4612015-07-30 06:57:46 -04004801 return nfs4_check_fh(current_fh, &stp->st_stid);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004802}
4803
Linus Torvalds1da177e2005-04-16 15:20:36 -07004804/*
4805 * Checks for sequence id mutating operations.
4806 */
Al Virob37ad282006-10-19 23:28:59 -07004807static __be32
Benny Halevydd453df2009-04-03 08:28:41 +03004808nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
J. Bruce Fields2288d0e2011-09-06 15:50:21 -04004809 stateid_t *stateid, char typemask,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004810 struct nfs4_ol_stateid **stpp,
4811 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004812{
J. Bruce Fields0836f582008-01-26 19:08:12 -05004813 __be32 status;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04004814 struct nfs4_stid *s;
Trond Myklebuste17f99b2014-06-30 11:48:34 -04004815 struct nfs4_ol_stateid *stp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004817 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
4818 seqid, STATEID_VAL(stateid));
NeilBrown3a4f98b2005-07-07 17:59:26 -07004819
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 *stpp = NULL;
Trond Myklebust2dd6e452014-06-30 11:48:43 -04004821 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004822 if (status)
4823 return status;
Trond Myklebuste17f99b2014-06-30 11:48:34 -04004824 stp = openlockstateid(s);
Jeff Layton58fb12e2014-07-29 21:34:27 -04004825 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004826
Trond Myklebuste17f99b2014-06-30 11:48:34 -04004827 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
Trond Myklebustfd911012014-07-29 21:34:24 -04004828 if (!status)
Trond Myklebuste17f99b2014-06-30 11:48:34 -04004829 *stpp = stp;
Trond Myklebustfd911012014-07-29 21:34:24 -04004830 else
4831 nfs4_put_stid(&stp->st_stid);
Trond Myklebuste17f99b2014-06-30 11:48:34 -04004832 return status;
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004833}
J. Bruce Fields39325bd2007-11-26 17:06:39 -05004834
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004835static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4836 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004837{
4838 __be32 status;
4839 struct nfs4_openowner *oo;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04004840 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004841
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004842 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04004843 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields7a8711c2011-09-02 09:03:37 -04004844 if (status)
4845 return status;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04004846 oo = openowner(stp->st_stateowner);
4847 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
4848 nfs4_put_stid(&stp->st_stid);
NeilBrown3a4f98b2005-07-07 17:59:26 -07004849 return nfserr_bad_stateid;
Trond Myklebust4cbfc9f2014-07-29 21:34:23 -04004850 }
4851 *stpp = stp;
NeilBrown3a4f98b2005-07-07 17:59:26 -07004852 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004853}
4854
Al Virob37ad282006-10-19 23:28:59 -07004855__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004856nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004857 struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004858{
Al Virob37ad282006-10-19 23:28:59 -07004859 __be32 status;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004860 struct nfs4_openowner *oo;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004861 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004862 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004863
Al Viroa6a9f182013-09-16 10:57:01 -04004864 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4865 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004866
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004867 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
J. Bruce Fieldsa8cddc52006-06-30 01:56:13 -07004868 if (status)
4869 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004870
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004871 status = nfs4_preprocess_seqid_op(cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004872 oc->oc_seqid, &oc->oc_req_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004873 NFS4_OPEN_STID, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004874 if (status)
J. Bruce Fields68b66e82011-09-02 12:19:43 -04004875 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04004876 oo = openowner(stp->st_stateowner);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04004877 status = nfserr_bad_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004878 if (oo->oo_flags & NFS4_OO_CONFIRMED)
Trond Myklebust2585fc72014-07-29 21:34:21 -04004879 goto put_stateid;
J. Bruce Fieldsdad1c062011-09-12 12:24:13 -04004880 oo->oo_flags |= NFS4_OO_CONFIRMED;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004881 update_stateid(&stp->st_stid.sc_stateid);
4882 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Benny Halevy8c10cbd2009-10-19 12:04:53 +02004883 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004884 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
NeilBrownc7b9a452005-06-23 22:04:30 -07004885
Jeff Layton2a4317c2012-03-21 16:42:43 -04004886 nfsd4_client_record_create(oo->oo_owner.so_client);
J. Bruce Fields68b66e82011-09-02 12:19:43 -04004887 status = nfs_ok;
Trond Myklebust2585fc72014-07-29 21:34:21 -04004888put_stateid:
4889 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004890out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004891 nfsd4_bump_seqid(cstate, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004892 return status;
4893}
4894
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04004895static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004896{
Jeff Layton82c5ff12012-05-11 09:45:13 -04004897 if (!test_access(access, stp))
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04004898 return;
Trond Myklebust11b91642014-07-29 21:34:08 -04004899 nfs4_file_put_access(stp->st_stid.sc_file, access);
Jeff Layton82c5ff12012-05-11 09:45:13 -04004900 clear_access(access, stp);
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04004901}
J. Bruce Fieldsf197c272011-06-29 08:23:50 -04004902
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04004903static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
4904{
4905 switch (to_access) {
4906 case NFS4_SHARE_ACCESS_READ:
4907 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
4908 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4909 break;
4910 case NFS4_SHARE_ACCESS_WRITE:
4911 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
4912 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4913 break;
4914 case NFS4_SHARE_ACCESS_BOTH:
4915 break;
4916 default:
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05004917 WARN_ON_ONCE(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004918 }
4919}
4920
Al Virob37ad282006-10-19 23:28:59 -07004921__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004922nfsd4_open_downgrade(struct svc_rqst *rqstp,
4923 struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004924 struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004925{
Al Virob37ad282006-10-19 23:28:59 -07004926 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004927 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004928 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004929
Al Viroa6a9f182013-09-16 10:57:01 -04004930 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4931 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004932
J. Bruce Fieldsc30e92d2011-10-10 17:34:31 -04004933 /* We don't yet support WANT bits: */
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02004934 if (od->od_deleg_want)
4935 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
4936 od->od_deleg_want);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004937
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04004938 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004939 &od->od_stateid, &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04004940 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004941 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004942 status = nfserr_inval;
Jeff Layton82c5ff12012-05-11 09:45:13 -04004943 if (!test_access(od->od_share_access, stp)) {
Jeff Laytonc11c5912014-07-10 14:07:30 -04004944 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004945 stp->st_access_bmap, od->od_share_access);
Trond Myklebust0667b1e2014-07-29 21:34:22 -04004946 goto put_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004947 }
Jeff Laytonce0fc432012-05-11 09:45:14 -04004948 if (!test_deny(od->od_share_deny, stp)) {
Jeff Laytonc11c5912014-07-10 14:07:30 -04004949 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004950 stp->st_deny_bmap, od->od_share_deny);
Trond Myklebust0667b1e2014-07-29 21:34:22 -04004951 goto put_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004952 }
J. Bruce Fields6409a5a2011-09-28 11:37:56 -04004953 nfs4_stateid_downgrade(stp, od->od_share_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004954
Jeff Laytonce0fc432012-05-11 09:45:14 -04004955 reset_union_bmap_deny(od->od_share_deny, stp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004956
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004957 update_stateid(&stp->st_stid.sc_stateid);
4958 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004959 status = nfs_ok;
Trond Myklebust0667b1e2014-07-29 21:34:22 -04004960put_stateid:
4961 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004962out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004963 nfsd4_bump_seqid(cstate, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004964 return status;
4965}
4966
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004967static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4968{
Trond Myklebustacf92952014-06-30 11:48:37 -04004969 struct nfs4_client *clp = s->st_stid.sc_client;
Jeff Laytond83017f2014-07-29 21:34:42 -04004970 LIST_HEAD(reaplist);
Trond Myklebustacf92952014-06-30 11:48:37 -04004971
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04004972 s->st_stid.sc_type = NFS4_CLOSED_STID;
Jeff Layton2c41beb2014-07-29 21:34:41 -04004973 spin_lock(&clp->cl_lock);
Jeff Laytond83017f2014-07-29 21:34:42 -04004974 unhash_open_stateid(s, &reaplist);
Trond Myklebustacf92952014-06-30 11:48:37 -04004975
Jeff Laytond83017f2014-07-29 21:34:42 -04004976 if (clp->cl_minorversion) {
4977 put_ol_stateid_locked(s, &reaplist);
4978 spin_unlock(&clp->cl_lock);
4979 free_ol_stateid_reaplist(&reaplist);
4980 } else {
4981 spin_unlock(&clp->cl_lock);
4982 free_ol_stateid_reaplist(&reaplist);
Jeff Laytond3134b12014-07-29 21:34:32 -04004983 move_to_close_lru(s, clp->net);
Jeff Laytond83017f2014-07-29 21:34:42 -04004984 }
J. Bruce Fields38c387b2011-09-16 17:42:48 -04004985}
4986
Linus Torvalds1da177e2005-04-16 15:20:36 -07004987/*
4988 * nfs4_unlock_state() called after encode
4989 */
Al Virob37ad282006-10-19 23:28:59 -07004990__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08004991nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08004992 struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004993{
Al Virob37ad282006-10-19 23:28:59 -07004994 __be32 status;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04004995 struct nfs4_ol_stateid *stp;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03004996 struct net *net = SVC_NET(rqstp);
4997 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004998
Al Viroa6a9f182013-09-16 10:57:01 -04004999 dprintk("NFSD: nfsd4_close on file %pd\n",
5000 cstate->current_fh.fh_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005001
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005002 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
5003 &close->cl_stateid,
5004 NFS4_OPEN_STID|NFS4_CLOSED_STID,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005005 &stp, nn);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005006 nfsd4_bump_seqid(cstate, status);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005007 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005008 goto out;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005009 update_stateid(&stp->st_stid.sc_stateid);
5010 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005011
J. Bruce Fieldsf7a4d872011-09-16 20:12:38 -04005012 nfsd4_close_open_stateid(stp);
Trond Myklebust8a0b5892014-07-29 21:34:20 -04005013
5014 /* put reference from nfs4_preprocess_seqid_op */
5015 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005016out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005017 return status;
5018}
5019
Al Virob37ad282006-10-19 23:28:59 -07005020__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005021nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5022 struct nfsd4_delegreturn *dr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005023{
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005024 struct nfs4_delegation *dp;
5025 stateid_t *stateid = &dr->dr_stateid;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005026 struct nfs4_stid *s;
Al Virob37ad282006-10-19 23:28:59 -07005027 __be32 status;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005028 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005029
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005030 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005031 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005032
Trond Myklebust2dd6e452014-06-30 11:48:43 -04005033 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005034 if (status)
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005035 goto out;
J. Bruce Fields38c2f4b2011-09-23 17:01:19 -04005036 dp = delegstateid(s);
J. Bruce Fieldsd5477a82011-09-08 12:07:44 -04005037 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005038 if (status)
Trond Myklebustfd911012014-07-29 21:34:24 -04005039 goto put_stateid;
J. Bruce Fields203a8c82009-02-21 13:29:14 -08005040
J. Bruce Fields3bd64a52013-04-09 17:02:51 -04005041 destroy_delegation(dp);
Trond Myklebustfd911012014-07-29 21:34:24 -04005042put_stateid:
5043 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005044out:
5045 return status;
5046}
5047
5048
Linus Torvalds1da177e2005-04-16 15:20:36 -07005049#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005050
Benny Halevy87df4de2008-12-15 19:42:03 +02005051static inline u64
5052end_offset(u64 start, u64 len)
5053{
5054 u64 end;
5055
5056 end = start + len;
5057 return end >= start ? end: NFS4_MAX_UINT64;
5058}
5059
5060/* last octet in a range */
5061static inline u64
5062last_byte_offset(u64 start, u64 len)
5063{
5064 u64 end;
5065
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05005066 WARN_ON_ONCE(!len);
Benny Halevy87df4de2008-12-15 19:42:03 +02005067 end = start + len;
5068 return end > start ? end - 1: NFS4_MAX_UINT64;
5069}
5070
Linus Torvalds1da177e2005-04-16 15:20:36 -07005071/*
5072 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5073 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5074 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5075 * locking, this prevents us from being completely protocol-compliant. The
5076 * real solution to this problem is to start using unsigned file offsets in
5077 * the VFS, but this is a very deep change!
5078 */
5079static inline void
5080nfs4_transform_lock_offset(struct file_lock *lock)
5081{
5082 if (lock->fl_start < 0)
5083 lock->fl_start = OFFSET_MAX;
5084 if (lock->fl_end < 0)
5085 lock->fl_end = OFFSET_MAX;
5086}
5087
Jeff Laytoncae80b32015-04-03 09:04:04 -04005088static fl_owner_t
5089nfsd4_fl_get_owner(fl_owner_t owner)
Kinglong Meeaef95832014-08-22 10:18:44 -04005090{
Jeff Laytoncae80b32015-04-03 09:04:04 -04005091 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5092
5093 nfs4_get_stateowner(&lo->lo_owner);
5094 return owner;
Kinglong Meeaef95832014-08-22 10:18:44 -04005095}
5096
Jeff Laytoncae80b32015-04-03 09:04:04 -04005097static void
5098nfsd4_fl_put_owner(fl_owner_t owner)
Kinglong Meeaef95832014-08-22 10:18:44 -04005099{
Jeff Laytoncae80b32015-04-03 09:04:04 -04005100 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
Kinglong Meeaef95832014-08-22 10:18:44 -04005101
Jeff Laytoncae80b32015-04-03 09:04:04 -04005102 if (lo)
Kinglong Meeaef95832014-08-22 10:18:44 -04005103 nfs4_put_stateowner(&lo->lo_owner);
Kinglong Meeaef95832014-08-22 10:18:44 -04005104}
5105
Alexey Dobriyan7b021962009-09-21 17:01:12 -07005106static const struct lock_manager_operations nfsd_posix_mng_ops = {
Kinglong Meeaef95832014-08-22 10:18:44 -04005107 .lm_get_owner = nfsd4_fl_get_owner,
5108 .lm_put_owner = nfsd4_fl_put_owner,
NeilBrownd5b90262006-04-10 22:55:22 -07005109};
Linus Torvalds1da177e2005-04-16 15:20:36 -07005110
5111static inline void
5112nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
5113{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005114 struct nfs4_lockowner *lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005115
NeilBrownd5b90262006-04-10 22:55:22 -07005116 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005117 lo = (struct nfs4_lockowner *) fl->fl_owner;
5118 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
5119 lo->lo_owner.so_owner.len, GFP_KERNEL);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04005120 if (!deny->ld_owner.data)
5121 /* We just don't care that much */
5122 goto nevermind;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005123 deny->ld_owner.len = lo->lo_owner.so_owner.len;
5124 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
NeilBrownd5b90262006-04-10 22:55:22 -07005125 } else {
J. Bruce Fields7c13f342011-08-30 22:15:47 -04005126nevermind:
5127 deny->ld_owner.len = 0;
5128 deny->ld_owner.data = NULL;
NeilBrownd5b90262006-04-10 22:55:22 -07005129 deny->ld_clientid.cl_boot = 0;
5130 deny->ld_clientid.cl_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005131 }
5132 deny->ld_start = fl->fl_start;
Benny Halevy87df4de2008-12-15 19:42:03 +02005133 deny->ld_length = NFS4_MAX_UINT64;
5134 if (fl->fl_end != NFS4_MAX_UINT64)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005135 deny->ld_length = fl->fl_end - fl->fl_start + 1;
5136 deny->ld_type = NFS4_READ_LT;
5137 if (fl->fl_type != F_RDLCK)
5138 deny->ld_type = NFS4_WRITE_LT;
5139}
5140
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005141static struct nfs4_lockowner *
Trond Myklebustc58c6612014-07-29 21:34:35 -04005142find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner,
Trond Myklebustd4f04892014-07-29 21:34:36 -04005143 struct nfs4_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005144{
Trond Myklebustd4f04892014-07-29 21:34:36 -04005145 unsigned int strhashval = ownerstr_hashval(owner);
Trond Myklebustb3c32bc2014-06-30 11:48:40 -04005146 struct nfs4_stateowner *so;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005147
Trond Myklebust0a880a22014-07-30 08:27:10 -04005148 lockdep_assert_held(&clp->cl_lock);
5149
Trond Myklebustd4f04892014-07-29 21:34:36 -04005150 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
5151 so_strhash) {
Trond Myklebustb3c32bc2014-06-30 11:48:40 -04005152 if (so->so_is_open_owner)
5153 continue;
Kinglong Meeb5971af2014-08-22 10:18:43 -04005154 if (same_owner_str(so, owner))
5155 return lockowner(nfs4_get_stateowner(so));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005156 }
5157 return NULL;
5158}
5159
Trond Myklebustc58c6612014-07-29 21:34:35 -04005160static struct nfs4_lockowner *
5161find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
Trond Myklebustd4f04892014-07-29 21:34:36 -04005162 struct nfs4_client *clp)
Trond Myklebustc58c6612014-07-29 21:34:35 -04005163{
5164 struct nfs4_lockowner *lo;
5165
Trond Myklebustd4f04892014-07-29 21:34:36 -04005166 spin_lock(&clp->cl_lock);
5167 lo = find_lockowner_str_locked(clid, owner, clp);
5168 spin_unlock(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005169 return lo;
5170}
5171
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005172static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
5173{
Trond Myklebustc58c6612014-07-29 21:34:35 -04005174 unhash_lockowner_locked(lockowner(sop));
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005175}
5176
Jeff Layton6b180f02014-07-29 21:34:26 -04005177static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
5178{
5179 struct nfs4_lockowner *lo = lockowner(sop);
5180
5181 kmem_cache_free(lockowner_slab, lo);
5182}
5183
5184static const struct nfs4_stateowner_operations lockowner_ops = {
Jeff Layton8f4b54c2014-07-29 21:34:29 -04005185 .so_unhash = nfs4_unhash_lockowner,
5186 .so_free = nfs4_free_lockowner,
Jeff Layton6b180f02014-07-29 21:34:26 -04005187};
5188
Linus Torvalds1da177e2005-04-16 15:20:36 -07005189/*
5190 * Alloc a lock owner structure.
5191 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
Lucas De Marchi25985ed2011-03-30 22:57:33 -03005192 * occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005193 *
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05005194 * strhashval = ownerstr_hashval
Linus Torvalds1da177e2005-04-16 15:20:36 -07005195 */
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005196static struct nfs4_lockowner *
Trond Myklebustc58c6612014-07-29 21:34:35 -04005197alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
5198 struct nfs4_ol_stateid *open_stp,
5199 struct nfsd4_lock *lock)
5200{
Trond Myklebustc58c6612014-07-29 21:34:35 -04005201 struct nfs4_lockowner *lo, *ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005202
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005203 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
5204 if (!lo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005205 return NULL;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005206 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
5207 lo->lo_owner.so_is_open_owner = 0;
Jeff Layton5db1c032014-07-29 21:34:28 -04005208 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
Jeff Layton6b180f02014-07-29 21:34:26 -04005209 lo->lo_owner.so_ops = &lockowner_ops;
Trond Myklebustd4f04892014-07-29 21:34:36 -04005210 spin_lock(&clp->cl_lock);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005211 ret = find_lockowner_str_locked(&clp->cl_clientid,
Trond Myklebustd4f04892014-07-29 21:34:36 -04005212 &lock->lk_new_owner, clp);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005213 if (ret == NULL) {
5214 list_add(&lo->lo_owner.so_strhash,
Trond Myklebustd4f04892014-07-29 21:34:36 -04005215 &clp->cl_ownerstr_hashtbl[strhashval]);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005216 ret = lo;
5217 } else
5218 nfs4_free_lockowner(&lo->lo_owner);
Trond Myklebustd4f04892014-07-29 21:34:36 -04005219 spin_unlock(&clp->cl_lock);
J. Bruce Fields340f0ba2015-03-23 11:02:30 -04005220 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005221}
5222
Jeff Layton356a95e2014-07-29 21:34:13 -04005223static void
5224init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
5225 struct nfs4_file *fp, struct inode *inode,
5226 struct nfs4_ol_stateid *open_stp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005227{
J. Bruce Fieldsd3b313a2011-09-15 15:02:41 -04005228 struct nfs4_client *clp = lo->lo_owner.so_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229
Jeff Layton356a95e2014-07-29 21:34:13 -04005230 lockdep_assert_held(&clp->cl_lock);
5231
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005232 atomic_inc(&stp->st_stid.sc_count);
J. Bruce Fields3abdb602013-02-03 12:23:01 -05005233 stp->st_stid.sc_type = NFS4_LOCK_STID;
Kinglong Meeb5971af2014-08-22 10:18:43 -04005234 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
NeilBrown13cd2182005-06-23 22:03:10 -07005235 get_nfs4_file(fp);
Trond Myklebust11b91642014-07-29 21:34:08 -04005236 stp->st_stid.sc_file = fp;
Jeff Laytonb49e0842014-07-29 21:34:11 -04005237 stp->st_stid.sc_free = nfs4_free_lock_stateid;
J. Bruce Fields0997b172011-03-02 18:01:35 -05005238 stp->st_access_bmap = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239 stp->st_deny_bmap = open_stp->st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -07005240 stp->st_openstp = open_stp;
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04005241 list_add(&stp->st_locks, &open_stp->st_locks);
Jeff Layton1c755dc2014-07-29 21:34:12 -04005242 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
Trond Myklebust1d31a252014-07-10 14:07:25 -04005243 spin_lock(&fp->fi_lock);
5244 list_add(&stp->st_perfile, &fp->fi_stateids);
5245 spin_unlock(&fp->fi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005246}
5247
Jeff Laytonc53530d2014-06-30 11:48:39 -04005248static struct nfs4_ol_stateid *
5249find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
5250{
5251 struct nfs4_ol_stateid *lst;
Jeff Layton356a95e2014-07-29 21:34:13 -04005252 struct nfs4_client *clp = lo->lo_owner.so_client;
5253
5254 lockdep_assert_held(&clp->cl_lock);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005255
5256 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005257 if (lst->st_stid.sc_file == fp) {
5258 atomic_inc(&lst->st_stid.sc_count);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005259 return lst;
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005260 }
Jeff Laytonc53530d2014-06-30 11:48:39 -04005261 }
5262 return NULL;
5263}
5264
Jeff Layton356a95e2014-07-29 21:34:13 -04005265static struct nfs4_ol_stateid *
5266find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
5267 struct inode *inode, struct nfs4_ol_stateid *ost,
5268 bool *new)
5269{
5270 struct nfs4_stid *ns = NULL;
5271 struct nfs4_ol_stateid *lst;
5272 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5273 struct nfs4_client *clp = oo->oo_owner.so_client;
5274
5275 spin_lock(&clp->cl_lock);
5276 lst = find_lock_stateid(lo, fi);
5277 if (lst == NULL) {
5278 spin_unlock(&clp->cl_lock);
5279 ns = nfs4_alloc_stid(clp, stateid_slab);
5280 if (ns == NULL)
5281 return NULL;
5282
5283 spin_lock(&clp->cl_lock);
5284 lst = find_lock_stateid(lo, fi);
5285 if (likely(!lst)) {
5286 lst = openlockstateid(ns);
5287 init_lock_stateid(lst, lo, fi, inode, ost);
5288 ns = NULL;
5289 *new = true;
5290 }
5291 }
5292 spin_unlock(&clp->cl_lock);
5293 if (ns)
5294 nfs4_put_stid(ns);
5295 return lst;
5296}
Jeff Laytonc53530d2014-06-30 11:48:39 -04005297
NeilBrownfd39ca92005-06-23 22:04:03 -07005298static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07005299check_lock_length(u64 offset, u64 length)
5300{
Benny Halevy87df4de2008-12-15 19:42:03 +02005301 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07005302 LOFF_OVERFLOW(offset, length)));
5303}
5304
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005305static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
J. Bruce Fields0997b172011-03-02 18:01:35 -05005306{
Trond Myklebust11b91642014-07-29 21:34:08 -04005307 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
J. Bruce Fields0997b172011-03-02 18:01:35 -05005308
Jeff Layton7214e862014-07-10 14:07:33 -04005309 lockdep_assert_held(&fp->fi_lock);
5310
Jeff Layton82c5ff12012-05-11 09:45:13 -04005311 if (test_access(access, lock_stp))
J. Bruce Fields0997b172011-03-02 18:01:35 -05005312 return;
Jeff Layton12659652014-07-10 14:07:28 -04005313 __nfs4_file_get_access(fp, access);
Jeff Layton82c5ff12012-05-11 09:45:13 -04005314 set_access(access, lock_stp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005315}
5316
Jeff Layton356a95e2014-07-29 21:34:13 -04005317static __be32
5318lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
5319 struct nfs4_ol_stateid *ost,
5320 struct nfsd4_lock *lock,
5321 struct nfs4_ol_stateid **lst, bool *new)
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005322{
Jeff Layton5db1c032014-07-29 21:34:28 -04005323 __be32 status;
Trond Myklebust11b91642014-07-29 21:34:08 -04005324 struct nfs4_file *fi = ost->st_stid.sc_file;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005325 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5326 struct nfs4_client *cl = oo->oo_owner.so_client;
David Howells2b0143b2015-03-17 22:25:59 +00005327 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005328 struct nfs4_lockowner *lo;
5329 unsigned int strhashval;
5330
Trond Myklebustd4f04892014-07-29 21:34:36 -04005331 lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005332 if (!lo) {
Trond Myklebustd4f04892014-07-29 21:34:36 -04005333 strhashval = ownerstr_hashval(&lock->v.new.owner);
Jeff Laytonc53530d2014-06-30 11:48:39 -04005334 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
5335 if (lo == NULL)
5336 return nfserr_jukebox;
5337 } else {
5338 /* with an existing lockowner, seqids must be the same */
Jeff Layton5db1c032014-07-29 21:34:28 -04005339 status = nfserr_bad_seqid;
Jeff Laytonc53530d2014-06-30 11:48:39 -04005340 if (!cstate->minorversion &&
5341 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
Jeff Layton5db1c032014-07-29 21:34:28 -04005342 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005343 }
Jeff Laytonc53530d2014-06-30 11:48:39 -04005344
Jeff Layton356a95e2014-07-29 21:34:13 -04005345 *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005346 if (*lst == NULL) {
Jeff Layton5db1c032014-07-29 21:34:28 -04005347 status = nfserr_jukebox;
5348 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005349 }
Jeff Layton5db1c032014-07-29 21:34:28 -04005350 status = nfs_ok;
5351out:
5352 nfs4_put_stateowner(&lo->lo_owner);
5353 return status;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005354}
5355
Linus Torvalds1da177e2005-04-16 15:20:36 -07005356/*
5357 * LOCK operation
5358 */
Al Virob37ad282006-10-19 23:28:59 -07005359__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005360nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005361 struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005362{
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005363 struct nfs4_openowner *open_sop = NULL;
5364 struct nfs4_lockowner *lock_sop = NULL;
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005365 struct nfs4_ol_stateid *lock_stp = NULL;
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005366 struct nfs4_ol_stateid *open_stp = NULL;
Jeff Layton7214e862014-07-10 14:07:33 -04005367 struct nfs4_file *fp;
J. Bruce Fields7d947842010-08-20 18:09:31 -04005368 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04005369 struct file_lock *file_lock = NULL;
5370 struct file_lock *conflock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005371 __be32 status = 0;
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005372 int lkflg;
Al Virob8dd7b92006-10-19 23:29:01 -07005373 int err;
Jeff Layton5db1c032014-07-29 21:34:28 -04005374 bool new = false;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005375 struct net *net = SVC_NET(rqstp);
5376 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005377
5378 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5379 (long long) lock->lk_offset,
5380 (long long) lock->lk_length);
5381
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382 if (check_lock_length(lock->lk_offset, lock->lk_length))
5383 return nfserr_inval;
5384
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005385 if ((status = fh_verify(rqstp, &cstate->current_fh,
Miklos Szeredi8837abc2008-06-16 13:20:29 +02005386 S_IFREG, NFSD_MAY_LOCK))) {
Andy Adamsona6f6ef22006-01-18 17:43:17 -08005387 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5388 return status;
5389 }
5390
Linus Torvalds1da177e2005-04-16 15:20:36 -07005391 if (lock->lk_is_new) {
J. Bruce Fields684e5632011-11-04 17:08:10 -04005392 if (nfsd4_has_session(cstate))
5393 /* See rfc 5661 18.10.3: given clientid is ignored: */
5394 memcpy(&lock->v.new.clientid,
5395 &cstate->session->se_client->cl_clientid,
5396 sizeof(clientid_t));
5397
Linus Torvalds1da177e2005-04-16 15:20:36 -07005398 status = nfserr_stale_clientid;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04005399 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005400 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005401
Linus Torvalds1da177e2005-04-16 15:20:36 -07005402 /* validate and update open stateid and open seqid */
J. Bruce Fieldsc0a5d932011-09-06 15:19:46 -04005403 status = nfs4_preprocess_confirmed_seqid_op(cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005404 lock->lk_new_open_seqid,
5405 &lock->lk_new_open_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005406 &open_stp, nn);
NeilBrown37515172005-07-07 17:59:16 -07005407 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005408 goto out;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005409 open_sop = openowner(open_stp->st_stateowner);
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005410 status = nfserr_bad_stateid;
J. Bruce Fields684e5632011-11-04 17:08:10 -04005411 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005412 &lock->v.new.clientid))
5413 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005414 status = lookup_or_create_lock_state(cstate, open_stp, lock,
Jeff Layton5db1c032014-07-29 21:34:28 -04005415 &lock_stp, &new);
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005416 } else {
Benny Halevydd453df2009-04-03 08:28:41 +03005417 status = nfs4_preprocess_seqid_op(cstate,
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005418 lock->lk_old_lock_seqid,
5419 &lock->lk_old_lock_stateid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005420 NFS4_LOCK_STID, &lock_stp, nn);
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005421 }
J. Bruce Fieldse1aaa892012-06-06 16:01:37 -04005422 if (status)
5423 goto out;
J. Bruce Fields64a284d2011-10-20 06:57:46 -04005424 lock_sop = lockowner(lock_stp->st_stateowner);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005425
J. Bruce Fieldsb34f27a2011-08-22 13:13:31 -04005426 lkflg = setlkflg(lock->lk_type);
5427 status = nfs4_check_openmode(lock_stp, lkflg);
5428 if (status)
5429 goto out;
5430
NeilBrown0dd395d2005-07-07 17:59:15 -07005431 status = nfserr_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005432 if (locks_in_grace(net) && !lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07005433 goto out;
5434 status = nfserr_no_grace;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005435 if (!locks_in_grace(net) && lock->lk_reclaim)
NeilBrown0dd395d2005-07-07 17:59:15 -07005436 goto out;
5437
Jeff Layton21179d82012-08-21 08:03:32 -04005438 file_lock = locks_alloc_lock();
5439 if (!file_lock) {
5440 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5441 status = nfserr_jukebox;
5442 goto out;
5443 }
5444
Trond Myklebust11b91642014-07-29 21:34:08 -04005445 fp = lock_stp->st_stid.sc_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005446 switch (lock->lk_type) {
5447 case NFS4_READ_LT:
5448 case NFS4_READW_LT:
Jeff Layton7214e862014-07-10 14:07:33 -04005449 spin_lock(&fp->fi_lock);
5450 filp = find_readable_file_locked(fp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005451 if (filp)
5452 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
Jeff Layton7214e862014-07-10 14:07:33 -04005453 spin_unlock(&fp->fi_lock);
Jeff Layton21179d82012-08-21 08:03:32 -04005454 file_lock->fl_type = F_RDLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05005455 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005456 case NFS4_WRITE_LT:
5457 case NFS4_WRITEW_LT:
Jeff Layton7214e862014-07-10 14:07:33 -04005458 spin_lock(&fp->fi_lock);
5459 filp = find_writeable_file_locked(fp);
J. Bruce Fields0997b172011-03-02 18:01:35 -05005460 if (filp)
5461 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
Jeff Layton7214e862014-07-10 14:07:33 -04005462 spin_unlock(&fp->fi_lock);
Jeff Layton21179d82012-08-21 08:03:32 -04005463 file_lock->fl_type = F_WRLCK;
J. Bruce Fields529d7b22011-03-02 23:48:33 -05005464 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005465 default:
5466 status = nfserr_inval;
5467 goto out;
5468 }
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005469 if (!filp) {
5470 status = nfserr_openmode;
5471 goto out;
5472 }
Kinglong Meeaef95832014-08-22 10:18:44 -04005473
5474 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
Jeff Layton21179d82012-08-21 08:03:32 -04005475 file_lock->fl_pid = current->tgid;
5476 file_lock->fl_file = filp;
5477 file_lock->fl_flags = FL_POSIX;
5478 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5479 file_lock->fl_start = lock->lk_offset;
5480 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
5481 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005482
Jeff Layton21179d82012-08-21 08:03:32 -04005483 conflock = locks_alloc_lock();
5484 if (!conflock) {
5485 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5486 status = nfserr_jukebox;
5487 goto out;
5488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005489
Jeff Layton21179d82012-08-21 08:03:32 -04005490 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
Al Virob8dd7b92006-10-19 23:29:01 -07005491 switch (-err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005492 case 0: /* success! */
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005493 update_stateid(&lock_stp->st_stid.sc_stateid);
5494 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005495 sizeof(stateid_t));
Al Virob8dd7b92006-10-19 23:29:01 -07005496 status = 0;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005497 break;
5498 case (EAGAIN): /* conflock holds conflicting lock */
5499 status = nfserr_denied;
5500 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
Jeff Layton21179d82012-08-21 08:03:32 -04005501 nfs4_set_lock_denied(conflock, &lock->lk_denied);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005502 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005503 case (EDEADLK):
5504 status = nfserr_deadlock;
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005505 break;
J. Bruce Fields3e772462011-08-10 19:07:33 -04005506 default:
Marc Eshelfd85b812006-11-28 16:26:41 -05005507 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
J. Bruce Fields3e772462011-08-10 19:07:33 -04005508 status = nfserrno(err);
Andy Adamsoneb76b3f2006-03-26 01:37:26 -08005509 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005510 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005511out:
Trond Myklebustde186432014-07-10 14:07:26 -04005512 if (filp)
5513 fput(filp);
Jeff Layton5db1c032014-07-29 21:34:28 -04005514 if (lock_stp) {
5515 /* Bump seqid manually if the 4.0 replay owner is openowner */
5516 if (cstate->replay_owner &&
5517 cstate->replay_owner != &lock_sop->lo_owner &&
5518 seqid_mutating_err(ntohl(status)))
5519 lock_sop->lo_owner.so_seqid++;
5520
5521 /*
5522 * If this is a new, never-before-used stateid, and we are
5523 * returning an error, then just go ahead and release it.
5524 */
5525 if (status && new)
5526 release_lock_stateid(lock_stp);
5527
Trond Myklebust3d0fabd2014-07-29 21:34:15 -04005528 nfs4_put_stid(&lock_stp->st_stid);
Jeff Layton5db1c032014-07-29 21:34:28 -04005529 }
Trond Myklebust0667b1e2014-07-29 21:34:22 -04005530 if (open_stp)
5531 nfs4_put_stid(&open_stp->st_stid);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005532 nfsd4_bump_seqid(cstate, status);
Jeff Layton21179d82012-08-21 08:03:32 -04005533 if (file_lock)
5534 locks_free_lock(file_lock);
5535 if (conflock)
5536 locks_free_lock(conflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005537 return status;
5538}
5539
5540/*
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005541 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5542 * so we do a temporary open here just to get an open file to pass to
5543 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5544 * inode operation.)
5545 */
Al Viro04da6e92012-04-13 00:00:04 -04005546static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005547{
5548 struct file *file;
Al Viro04da6e92012-04-13 00:00:04 -04005549 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
5550 if (!err) {
5551 err = nfserrno(vfs_test_lock(file, lock));
Christoph Hellwigfd891452015-04-28 15:41:16 +02005552 fput(file);
Al Viro04da6e92012-04-13 00:00:04 -04005553 }
J. Bruce Fields55ef1272008-12-20 11:58:38 -08005554 return err;
5555}
5556
5557/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07005558 * LOCKT operation
5559 */
Al Virob37ad282006-10-19 23:28:59 -07005560__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005561nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5562 struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005563{
Jeff Layton21179d82012-08-21 08:03:32 -04005564 struct file_lock *file_lock = NULL;
Jeff Layton5db1c032014-07-29 21:34:28 -04005565 struct nfs4_lockowner *lo = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005566 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03005567 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005568
Stanislav Kinsbursky5ccb0062012-07-25 16:57:22 +04005569 if (locks_in_grace(SVC_NET(rqstp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005570 return nfserr_grace;
5571
5572 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
5573 return nfserr_inval;
5574
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005575 if (!nfsd4_has_session(cstate)) {
Jeff Layton4b24ca72014-06-30 11:48:44 -04005576 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005577 if (status)
5578 goto out;
5579 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005580
J. Bruce Fields75c096f2011-08-15 18:39:32 -04005581 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005582 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005583
Jeff Layton21179d82012-08-21 08:03:32 -04005584 file_lock = locks_alloc_lock();
5585 if (!file_lock) {
5586 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5587 status = nfserr_jukebox;
5588 goto out;
5589 }
Kinglong Mee6cd90662014-08-15 08:02:55 +08005590
Linus Torvalds1da177e2005-04-16 15:20:36 -07005591 switch (lockt->lt_type) {
5592 case NFS4_READ_LT:
5593 case NFS4_READW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04005594 file_lock->fl_type = F_RDLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005595 break;
5596 case NFS4_WRITE_LT:
5597 case NFS4_WRITEW_LT:
Jeff Layton21179d82012-08-21 08:03:32 -04005598 file_lock->fl_type = F_WRLCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005599 break;
5600 default:
J. Bruce Fields2fdada02007-07-27 16:10:37 -04005601 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005602 status = nfserr_inval;
5603 goto out;
5604 }
5605
Trond Myklebustd4f04892014-07-29 21:34:36 -04005606 lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner,
5607 cstate->clp);
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -04005608 if (lo)
Jeff Layton21179d82012-08-21 08:03:32 -04005609 file_lock->fl_owner = (fl_owner_t)lo;
5610 file_lock->fl_pid = current->tgid;
5611 file_lock->fl_flags = FL_POSIX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005612
Jeff Layton21179d82012-08-21 08:03:32 -04005613 file_lock->fl_start = lockt->lt_offset;
5614 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005615
Jeff Layton21179d82012-08-21 08:03:32 -04005616 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005617
Jeff Layton21179d82012-08-21 08:03:32 -04005618 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
Al Viro04da6e92012-04-13 00:00:04 -04005619 if (status)
Marc Eshelfd85b812006-11-28 16:26:41 -05005620 goto out;
Al Viro04da6e92012-04-13 00:00:04 -04005621
Jeff Layton21179d82012-08-21 08:03:32 -04005622 if (file_lock->fl_type != F_UNLCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005623 status = nfserr_denied;
Jeff Layton21179d82012-08-21 08:03:32 -04005624 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005625 }
5626out:
Jeff Layton5db1c032014-07-29 21:34:28 -04005627 if (lo)
5628 nfs4_put_stateowner(&lo->lo_owner);
Jeff Layton21179d82012-08-21 08:03:32 -04005629 if (file_lock)
5630 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005631 return status;
5632}
5633
Al Virob37ad282006-10-19 23:28:59 -07005634__be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -08005635nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -08005636 struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005637{
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005638 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005639 struct file *filp = NULL;
Jeff Layton21179d82012-08-21 08:03:32 -04005640 struct file_lock *file_lock = NULL;
Al Virob37ad282006-10-19 23:28:59 -07005641 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07005642 int err;
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005643 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5644
Linus Torvalds1da177e2005-04-16 15:20:36 -07005645 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5646 (long long) locku->lu_offset,
5647 (long long) locku->lu_length);
5648
5649 if (check_lock_length(locku->lu_offset, locku->lu_length))
5650 return nfserr_inval;
5651
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005652 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03005653 &locku->lu_stateid, NFS4_LOCK_STID,
5654 &stp, nn);
J. Bruce Fields9072d5c2011-08-24 12:45:03 -04005655 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005656 goto out;
Trond Myklebust11b91642014-07-29 21:34:08 -04005657 filp = find_any_file(stp->st_stid.sc_file);
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005658 if (!filp) {
5659 status = nfserr_lock_range;
Trond Myklebust858cc572014-07-29 21:34:16 -04005660 goto put_stateid;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -04005661 }
Jeff Layton21179d82012-08-21 08:03:32 -04005662 file_lock = locks_alloc_lock();
5663 if (!file_lock) {
5664 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5665 status = nfserr_jukebox;
Trond Myklebustde186432014-07-10 14:07:26 -04005666 goto fput;
Jeff Layton21179d82012-08-21 08:03:32 -04005667 }
Kinglong Mee6cd90662014-08-15 08:02:55 +08005668
Jeff Layton21179d82012-08-21 08:03:32 -04005669 file_lock->fl_type = F_UNLCK;
Kinglong Meeaef95832014-08-22 10:18:44 -04005670 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
Jeff Layton21179d82012-08-21 08:03:32 -04005671 file_lock->fl_pid = current->tgid;
5672 file_lock->fl_file = filp;
5673 file_lock->fl_flags = FL_POSIX;
5674 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5675 file_lock->fl_start = locku->lu_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005676
Jeff Layton21179d82012-08-21 08:03:32 -04005677 file_lock->fl_end = last_byte_offset(locku->lu_offset,
5678 locku->lu_length);
5679 nfs4_transform_lock_offset(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005680
Jeff Layton21179d82012-08-21 08:03:32 -04005681 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
Al Virob8dd7b92006-10-19 23:29:01 -07005682 if (err) {
Marc Eshelfd85b812006-11-28 16:26:41 -05005683 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005684 goto out_nfserr;
5685 }
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005686 update_stateid(&stp->st_stid.sc_stateid);
5687 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
Trond Myklebustde186432014-07-10 14:07:26 -04005688fput:
5689 fput(filp);
Trond Myklebust858cc572014-07-29 21:34:16 -04005690put_stateid:
5691 nfs4_put_stid(&stp->st_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005692out:
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04005693 nfsd4_bump_seqid(cstate, status);
Jeff Layton21179d82012-08-21 08:03:32 -04005694 if (file_lock)
5695 locks_free_lock(file_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005696 return status;
5697
5698out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07005699 status = nfserrno(err);
Trond Myklebustde186432014-07-10 14:07:26 -04005700 goto fput;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005701}
5702
5703/*
5704 * returns
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005705 * true: locks held by lockowner
5706 * false: no locks held by lockowner
Linus Torvalds1da177e2005-04-16 15:20:36 -07005707 */
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005708static bool
5709check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005710{
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005711 struct file_lock *fl;
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005712 int status = false;
5713 struct file *filp = find_any_file(fp);
5714 struct inode *inode;
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005715 struct file_lock_context *flctx;
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005716
5717 if (!filp) {
5718 /* Any valid lock stateid should have some sort of access */
5719 WARN_ON_ONCE(1);
5720 return status;
5721 }
5722
5723 inode = file_inode(filp);
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005724 flctx = inode->i_flctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005725
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005726 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
Jeff Layton6109c852015-01-16 15:05:57 -05005727 spin_lock(&flctx->flc_lock);
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05005728 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
5729 if (fl->fl_owner == (fl_owner_t)lowner) {
5730 status = true;
5731 break;
5732 }
J. Bruce Fields796dadf2006-01-18 17:43:22 -08005733 }
Jeff Layton6109c852015-01-16 15:05:57 -05005734 spin_unlock(&flctx->flc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005735 }
Jeff Laytonf9c00c32014-07-23 16:17:41 -04005736 fput(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005737 return status;
5738}
5739
Al Virob37ad282006-10-19 23:28:59 -07005740__be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08005741nfsd4_release_lockowner(struct svc_rqst *rqstp,
5742 struct nfsd4_compound_state *cstate,
5743 struct nfsd4_release_lockowner *rlockowner)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005744{
5745 clientid_t *clid = &rlockowner->rl_clientid;
Jeff Layton882e9d22014-07-29 21:34:37 -04005746 struct nfs4_stateowner *sop;
5747 struct nfs4_lockowner *lo = NULL;
J. Bruce Fieldsdcef0412011-09-07 16:06:42 -04005748 struct nfs4_ol_stateid *stp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005749 struct xdr_netobj *owner = &rlockowner->rl_owner;
Trond Myklebustd4f04892014-07-29 21:34:36 -04005750 unsigned int hashval = ownerstr_hashval(owner);
Al Virob37ad282006-10-19 23:28:59 -07005751 __be32 status;
Stanislav Kinsbursky7f2210f2012-11-14 18:21:05 +03005752 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Trond Myklebustc58c6612014-07-29 21:34:35 -04005753 struct nfs4_client *clp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005754
5755 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5756 clid->cl_boot, clid->cl_id);
5757
Jeff Layton4b24ca72014-06-30 11:48:44 -04005758 status = lookup_clientid(clid, cstate, nn);
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005759 if (status)
Trond Myklebust51f5e782014-07-30 08:27:27 -04005760 return status;
J. Bruce Fields9b2ef622012-12-03 17:24:41 -05005761
Trond Myklebustd4f04892014-07-29 21:34:36 -04005762 clp = cstate->clp;
Jeff Laytonfd449072014-06-30 11:48:41 -04005763 /* Find the matching lock stateowner */
Trond Myklebustd4f04892014-07-29 21:34:36 -04005764 spin_lock(&clp->cl_lock);
Jeff Layton882e9d22014-07-29 21:34:37 -04005765 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
Trond Myklebustd4f04892014-07-29 21:34:36 -04005766 so_strhash) {
Jeff Layton882e9d22014-07-29 21:34:37 -04005767
5768 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
J. Bruce Fields16bfdaaf2011-11-07 17:23:30 -05005769 continue;
Jeff Laytonfd449072014-06-30 11:48:41 -04005770
Jeff Layton882e9d22014-07-29 21:34:37 -04005771 /* see if there are still any locks associated with it */
5772 lo = lockowner(sop);
5773 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
5774 if (check_for_locks(stp->st_stid.sc_file, lo)) {
5775 status = nfserr_locks_held;
5776 spin_unlock(&clp->cl_lock);
Trond Myklebust51f5e782014-07-30 08:27:27 -04005777 return status;
Jeff Layton882e9d22014-07-29 21:34:37 -04005778 }
Jeff Layton5adfd882014-07-29 21:34:31 -04005779 }
Jeff Layton882e9d22014-07-29 21:34:37 -04005780
Kinglong Meeb5971af2014-08-22 10:18:43 -04005781 nfs4_get_stateowner(sop);
Jeff Layton882e9d22014-07-29 21:34:37 -04005782 break;
Jeff Laytonfd449072014-06-30 11:48:41 -04005783 }
Trond Myklebustc58c6612014-07-29 21:34:35 -04005784 spin_unlock(&clp->cl_lock);
Jeff Layton882e9d22014-07-29 21:34:37 -04005785 if (lo)
5786 release_lockowner(lo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005787 return status;
5788}
5789
5790static inline struct nfs4_client_reclaim *
NeilBrowna55370a2005-06-23 22:03:52 -07005791alloc_reclaim(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005792{
NeilBrowna55370a2005-06-23 22:03:52 -07005793 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005794}
5795
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05005796bool
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005797nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
NeilBrownc7b9a452005-06-23 22:04:30 -07005798{
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05005799 struct nfs4_client_reclaim *crp;
NeilBrownc7b9a452005-06-23 22:04:30 -07005800
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005801 crp = nfsd4_find_reclaim_client(name, nn);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05005802 return (crp && crp->cr_clp);
NeilBrownc7b9a452005-06-23 22:04:30 -07005803}
5804
Linus Torvalds1da177e2005-04-16 15:20:36 -07005805/*
5806 * failure => all reset bets are off, nfserr_no_grace...
5807 */
Jeff Layton772a9bb2012-11-12 15:00:54 -05005808struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005809nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005810{
5811 unsigned int strhashval;
Jeff Layton772a9bb2012-11-12 15:00:54 -05005812 struct nfs4_client_reclaim *crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005813
NeilBrowna55370a2005-06-23 22:03:52 -07005814 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
5815 crp = alloc_reclaim();
Jeff Layton772a9bb2012-11-12 15:00:54 -05005816 if (crp) {
5817 strhashval = clientstr_hashval(name);
5818 INIT_LIST_HEAD(&crp->cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005819 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
Jeff Layton772a9bb2012-11-12 15:00:54 -05005820 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
Jeff Layton0ce0c2b2012-11-12 15:00:55 -05005821 crp->cr_clp = NULL;
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005822 nn->reclaim_str_hashtbl_size++;
Jeff Layton772a9bb2012-11-12 15:00:54 -05005823 }
5824 return crp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005825}
5826
Jeff Layton2a4317c2012-03-21 16:42:43 -04005827void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005828nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
Jeff Laytonce30e532012-11-12 15:00:53 -05005829{
5830 list_del(&crp->cr_strhash);
5831 kfree(crp);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005832 nn->reclaim_str_hashtbl_size--;
Jeff Laytonce30e532012-11-12 15:00:53 -05005833}
5834
5835void
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005836nfs4_release_reclaim(struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005837{
5838 struct nfs4_client_reclaim *crp = NULL;
5839 int i;
5840
Linus Torvalds1da177e2005-04-16 15:20:36 -07005841 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005842 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
5843 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005844 struct nfs4_client_reclaim, cr_strhash);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005845 nfs4_remove_reclaim_record(crp, nn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005846 }
5847 }
J. Bruce Fields063b0fb2012-11-25 14:48:10 -05005848 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005849}
5850
5851/*
5852 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
Jeff Layton2a4317c2012-03-21 16:42:43 -04005853struct nfs4_client_reclaim *
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005854nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005855{
5856 unsigned int strhashval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005857 struct nfs4_client_reclaim *crp = NULL;
5858
Jeff Layton278c9312012-11-12 15:00:52 -05005859 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005860
Jeff Layton278c9312012-11-12 15:00:52 -05005861 strhashval = clientstr_hashval(recdir);
Stanislav Kinsbursky52e19c02012-11-14 18:21:16 +03005862 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
Jeff Layton278c9312012-11-12 15:00:52 -05005863 if (same_name(crp->cr_recdir, recdir)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005864 return crp;
5865 }
5866 }
5867 return NULL;
5868}
5869
5870/*
5871* Called from OPEN. Look for clientid in reclaim list.
5872*/
Al Virob37ad282006-10-19 23:28:59 -07005873__be32
Trond Myklebust0fe492d2014-06-30 11:48:47 -04005874nfs4_check_open_reclaim(clientid_t *clid,
5875 struct nfsd4_compound_state *cstate,
5876 struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005877{
Trond Myklebust0fe492d2014-06-30 11:48:47 -04005878 __be32 status;
Jeff Laytona52d7262012-03-21 09:52:02 -04005879
5880 /* find clientid in conf_id_hashtbl */
Trond Myklebust0fe492d2014-06-30 11:48:47 -04005881 status = lookup_clientid(clid, cstate, nn);
5882 if (status)
Jeff Laytona52d7262012-03-21 09:52:02 -04005883 return nfserr_reclaim_bad;
5884
Jeff Layton3b3e7b72014-09-12 16:40:22 -04005885 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
5886 return nfserr_no_grace;
5887
Trond Myklebust0fe492d2014-06-30 11:48:47 -04005888 if (nfsd4_client_record_check(cstate->clp))
5889 return nfserr_reclaim_bad;
5890
5891 return nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005892}
5893
Bryan Schumaker65178db2011-11-01 13:35:21 -04005894#ifdef CONFIG_NFSD_FAULT_INJECTION
Jeff Layton016200c2014-07-30 08:27:21 -04005895static inline void
5896put_client(struct nfs4_client *clp)
5897{
5898 atomic_dec(&clp->cl_refcount);
5899}
5900
Jeff Layton285abde2014-07-30 08:27:24 -04005901static struct nfs4_client *
5902nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
5903{
5904 struct nfs4_client *clp;
5905 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
5906 nfsd_net_id);
5907
5908 if (!nfsd_netns_ready(nn))
5909 return NULL;
5910
5911 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
5912 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
5913 return clp;
5914 }
5915 return NULL;
5916}
5917
Jeff Layton7ec0e362014-07-30 08:27:17 -04005918u64
Jeff Layton285abde2014-07-30 08:27:24 -04005919nfsd_inject_print_clients(void)
Jeff Layton7ec0e362014-07-30 08:27:17 -04005920{
5921 struct nfs4_client *clp;
5922 u64 count = 0;
5923 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
5924 nfsd_net_id);
5925 char buf[INET6_ADDRSTRLEN];
5926
5927 if (!nfsd_netns_ready(nn))
5928 return 0;
5929
5930 spin_lock(&nn->client_lock);
5931 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
5932 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5933 pr_info("NFS Client: %s\n", buf);
5934 ++count;
5935 }
5936 spin_unlock(&nn->client_lock);
5937
5938 return count;
5939}
Bryan Schumaker65178db2011-11-01 13:35:21 -04005940
Jeff Laytona0926d12014-07-30 08:27:18 -04005941u64
Jeff Layton285abde2014-07-30 08:27:24 -04005942nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size)
Jeff Laytona0926d12014-07-30 08:27:18 -04005943{
5944 u64 count = 0;
5945 struct nfs4_client *clp;
5946 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
5947 nfsd_net_id);
5948
5949 if (!nfsd_netns_ready(nn))
5950 return count;
5951
5952 spin_lock(&nn->client_lock);
5953 clp = nfsd_find_client(addr, addr_size);
5954 if (clp) {
5955 if (mark_client_expired_locked(clp) == nfs_ok)
5956 ++count;
5957 else
5958 clp = NULL;
5959 }
5960 spin_unlock(&nn->client_lock);
5961
5962 if (clp)
5963 expire_client(clp);
5964
5965 return count;
5966}
5967
Jeff Layton69fc9ed2014-07-30 08:27:19 -04005968u64
Jeff Layton285abde2014-07-30 08:27:24 -04005969nfsd_inject_forget_clients(u64 max)
Jeff Layton69fc9ed2014-07-30 08:27:19 -04005970{
5971 u64 count = 0;
5972 struct nfs4_client *clp, *next;
5973 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
5974 nfsd_net_id);
5975 LIST_HEAD(reaplist);
5976
5977 if (!nfsd_netns_ready(nn))
5978 return count;
5979
5980 spin_lock(&nn->client_lock);
5981 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
5982 if (mark_client_expired_locked(clp) == nfs_ok) {
5983 list_add(&clp->cl_lru, &reaplist);
5984 if (max != 0 && ++count >= max)
5985 break;
5986 }
5987 }
5988 spin_unlock(&nn->client_lock);
5989
5990 list_for_each_entry_safe(clp, next, &reaplist, cl_lru)
5991 expire_client(clp);
5992
5993 return count;
5994}
5995
Bryan Schumaker184c1842012-11-29 11:40:44 -05005996static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
5997 const char *type)
5998{
5999 char buf[INET6_ADDRSTRLEN];
Bryan Schumaker0a5c33e2012-12-07 16:17:28 -05006000 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
Bryan Schumaker184c1842012-11-29 11:40:44 -05006001 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
6002}
6003
Jeff Layton016200c2014-07-30 08:27:21 -04006004static void
6005nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
6006 struct list_head *collect)
6007{
6008 struct nfs4_client *clp = lst->st_stid.sc_client;
6009 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6010 nfsd_net_id);
6011
6012 if (!collect)
6013 return;
6014
6015 lockdep_assert_held(&nn->client_lock);
6016 atomic_inc(&clp->cl_refcount);
6017 list_add(&lst->st_locks, collect);
6018}
6019
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006020static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
Jeff Layton3738d502014-07-30 08:27:20 -04006021 struct list_head *collect,
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006022 void (*func)(struct nfs4_ol_stateid *))
Bryan Schumakerfc291712012-11-29 11:40:40 -05006023{
6024 struct nfs4_openowner *oop;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006025 struct nfs4_ol_stateid *stp, *st_next;
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006026 struct nfs4_ol_stateid *lst, *lst_next;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006027 u64 count = 0;
6028
Jeff Layton016200c2014-07-30 08:27:21 -04006029 spin_lock(&clp->cl_lock);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006030 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006031 list_for_each_entry_safe(stp, st_next,
6032 &oop->oo_owner.so_stateids, st_perstateowner) {
6033 list_for_each_entry_safe(lst, lst_next,
6034 &stp->st_locks, st_locks) {
Jeff Layton3738d502014-07-30 08:27:20 -04006035 if (func) {
Trond Myklebust3c87b9b2014-06-30 11:48:38 -04006036 func(lst);
Jeff Layton016200c2014-07-30 08:27:21 -04006037 nfsd_inject_add_lock_to_list(lst,
6038 collect);
Jeff Layton3738d502014-07-30 08:27:20 -04006039 }
Jeff Layton016200c2014-07-30 08:27:21 -04006040 ++count;
6041 /*
6042 * Despite the fact that these functions deal
6043 * with 64-bit integers for "count", we must
6044 * ensure that it doesn't blow up the
6045 * clp->cl_refcount. Throw a warning if we
6046 * start to approach INT_MAX here.
6047 */
6048 WARN_ON_ONCE(count == (INT_MAX / 2));
6049 if (count == max)
6050 goto out;
Bryan Schumakerfc291712012-11-29 11:40:40 -05006051 }
6052 }
6053 }
Jeff Layton016200c2014-07-30 08:27:21 -04006054out:
6055 spin_unlock(&clp->cl_lock);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006056
6057 return count;
6058}
6059
Jeff Layton016200c2014-07-30 08:27:21 -04006060static u64
6061nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect,
6062 u64 max)
Bryan Schumakerfc291712012-11-29 11:40:40 -05006063{
Jeff Layton016200c2014-07-30 08:27:21 -04006064 return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid);
Bryan Schumakerfc291712012-11-29 11:40:40 -05006065}
6066
Jeff Layton016200c2014-07-30 08:27:21 -04006067static u64
6068nfsd_print_client_locks(struct nfs4_client *clp)
Bryan Schumaker184c1842012-11-29 11:40:44 -05006069{
Jeff Layton016200c2014-07-30 08:27:21 -04006070 u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006071 nfsd_print_count(clp, count, "locked files");
6072 return count;
6073}
6074
Jeff Layton016200c2014-07-30 08:27:21 -04006075u64
Jeff Layton285abde2014-07-30 08:27:24 -04006076nfsd_inject_print_locks(void)
Jeff Layton016200c2014-07-30 08:27:21 -04006077{
6078 struct nfs4_client *clp;
6079 u64 count = 0;
6080 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6081 nfsd_net_id);
6082
6083 if (!nfsd_netns_ready(nn))
6084 return 0;
6085
6086 spin_lock(&nn->client_lock);
6087 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6088 count += nfsd_print_client_locks(clp);
6089 spin_unlock(&nn->client_lock);
6090
6091 return count;
6092}
6093
6094static void
6095nfsd_reap_locks(struct list_head *reaplist)
6096{
6097 struct nfs4_client *clp;
6098 struct nfs4_ol_stateid *stp, *next;
6099
6100 list_for_each_entry_safe(stp, next, reaplist, st_locks) {
6101 list_del_init(&stp->st_locks);
6102 clp = stp->st_stid.sc_client;
6103 nfs4_put_stid(&stp->st_stid);
6104 put_client(clp);
6105 }
6106}
6107
6108u64
Jeff Layton285abde2014-07-30 08:27:24 -04006109nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size)
Jeff Layton016200c2014-07-30 08:27:21 -04006110{
6111 unsigned int count = 0;
6112 struct nfs4_client *clp;
6113 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6114 nfsd_net_id);
6115 LIST_HEAD(reaplist);
6116
6117 if (!nfsd_netns_ready(nn))
6118 return count;
6119
6120 spin_lock(&nn->client_lock);
6121 clp = nfsd_find_client(addr, addr_size);
6122 if (clp)
6123 count = nfsd_collect_client_locks(clp, &reaplist, 0);
6124 spin_unlock(&nn->client_lock);
6125 nfsd_reap_locks(&reaplist);
6126 return count;
6127}
6128
6129u64
Jeff Layton285abde2014-07-30 08:27:24 -04006130nfsd_inject_forget_locks(u64 max)
Jeff Layton016200c2014-07-30 08:27:21 -04006131{
6132 u64 count = 0;
6133 struct nfs4_client *clp;
6134 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6135 nfsd_net_id);
6136 LIST_HEAD(reaplist);
6137
6138 if (!nfsd_netns_ready(nn))
6139 return count;
6140
6141 spin_lock(&nn->client_lock);
6142 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6143 count += nfsd_collect_client_locks(clp, &reaplist, max - count);
6144 if (max != 0 && count >= max)
6145 break;
6146 }
6147 spin_unlock(&nn->client_lock);
6148 nfsd_reap_locks(&reaplist);
6149 return count;
6150}
6151
Jeff Layton82e05ef2014-07-30 08:27:22 -04006152static u64
6153nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
6154 struct list_head *collect,
6155 void (*func)(struct nfs4_openowner *))
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006156{
6157 struct nfs4_openowner *oop, *next;
Jeff Layton82e05ef2014-07-30 08:27:22 -04006158 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6159 nfsd_net_id);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006160 u64 count = 0;
6161
Jeff Layton82e05ef2014-07-30 08:27:22 -04006162 lockdep_assert_held(&nn->client_lock);
6163
6164 spin_lock(&clp->cl_lock);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006165 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
Jeff Layton82e05ef2014-07-30 08:27:22 -04006166 if (func) {
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006167 func(oop);
Jeff Layton82e05ef2014-07-30 08:27:22 -04006168 if (collect) {
6169 atomic_inc(&clp->cl_refcount);
6170 list_add(&oop->oo_perclient, collect);
6171 }
6172 }
6173 ++count;
6174 /*
6175 * Despite the fact that these functions deal with
6176 * 64-bit integers for "count", we must ensure that
6177 * it doesn't blow up the clp->cl_refcount. Throw a
6178 * warning if we start to approach INT_MAX here.
6179 */
6180 WARN_ON_ONCE(count == (INT_MAX / 2));
6181 if (count == max)
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006182 break;
6183 }
Jeff Layton82e05ef2014-07-30 08:27:22 -04006184 spin_unlock(&clp->cl_lock);
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006185
6186 return count;
6187}
6188
Jeff Layton82e05ef2014-07-30 08:27:22 -04006189static u64
6190nfsd_print_client_openowners(struct nfs4_client *clp)
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006191{
Jeff Layton82e05ef2014-07-30 08:27:22 -04006192 u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL);
6193
6194 nfsd_print_count(clp, count, "openowners");
6195 return count;
Bryan Schumaker4dbdbda2012-11-29 11:40:41 -05006196}
6197
Jeff Layton82e05ef2014-07-30 08:27:22 -04006198static u64
6199nfsd_collect_client_openowners(struct nfs4_client *clp,
6200 struct list_head *collect, u64 max)
Bryan Schumaker184c1842012-11-29 11:40:44 -05006201{
Jeff Layton82e05ef2014-07-30 08:27:22 -04006202 return nfsd_foreach_client_openowner(clp, max, collect,
6203 unhash_openowner_locked);
6204}
6205
6206u64
Jeff Layton285abde2014-07-30 08:27:24 -04006207nfsd_inject_print_openowners(void)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006208{
6209 struct nfs4_client *clp;
6210 u64 count = 0;
6211 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6212 nfsd_net_id);
6213
6214 if (!nfsd_netns_ready(nn))
6215 return 0;
6216
6217 spin_lock(&nn->client_lock);
6218 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6219 count += nfsd_print_client_openowners(clp);
6220 spin_unlock(&nn->client_lock);
6221
6222 return count;
6223}
6224
6225static void
6226nfsd_reap_openowners(struct list_head *reaplist)
6227{
6228 struct nfs4_client *clp;
6229 struct nfs4_openowner *oop, *next;
6230
6231 list_for_each_entry_safe(oop, next, reaplist, oo_perclient) {
6232 list_del_init(&oop->oo_perclient);
6233 clp = oop->oo_owner.so_client;
6234 release_openowner(oop);
6235 put_client(clp);
6236 }
6237}
6238
6239u64
Jeff Layton285abde2014-07-30 08:27:24 -04006240nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr,
6241 size_t addr_size)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006242{
6243 unsigned int count = 0;
6244 struct nfs4_client *clp;
6245 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6246 nfsd_net_id);
6247 LIST_HEAD(reaplist);
6248
6249 if (!nfsd_netns_ready(nn))
6250 return count;
6251
6252 spin_lock(&nn->client_lock);
6253 clp = nfsd_find_client(addr, addr_size);
6254 if (clp)
6255 count = nfsd_collect_client_openowners(clp, &reaplist, 0);
6256 spin_unlock(&nn->client_lock);
6257 nfsd_reap_openowners(&reaplist);
6258 return count;
6259}
6260
6261u64
Jeff Layton285abde2014-07-30 08:27:24 -04006262nfsd_inject_forget_openowners(u64 max)
Jeff Layton82e05ef2014-07-30 08:27:22 -04006263{
6264 u64 count = 0;
6265 struct nfs4_client *clp;
6266 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6267 nfsd_net_id);
6268 LIST_HEAD(reaplist);
6269
6270 if (!nfsd_netns_ready(nn))
6271 return count;
6272
6273 spin_lock(&nn->client_lock);
6274 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6275 count += nfsd_collect_client_openowners(clp, &reaplist,
6276 max - count);
6277 if (max != 0 && count >= max)
6278 break;
6279 }
6280 spin_unlock(&nn->client_lock);
6281 nfsd_reap_openowners(&reaplist);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006282 return count;
6283}
6284
Bryan Schumaker269de302012-11-29 11:40:42 -05006285static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
6286 struct list_head *victims)
6287{
6288 struct nfs4_delegation *dp, *next;
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006289 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6290 nfsd_net_id);
Bryan Schumaker269de302012-11-29 11:40:42 -05006291 u64 count = 0;
6292
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006293 lockdep_assert_held(&nn->client_lock);
6294
6295 spin_lock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05006296 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
Jeff Laytondff13992014-07-08 14:02:49 -04006297 if (victims) {
6298 /*
6299 * It's not safe to mess with delegations that have a
6300 * non-zero dl_time. They might have already been broken
6301 * and could be processed by the laundromat outside of
6302 * the state_lock. Just leave them be.
6303 */
6304 if (dp->dl_time != 0)
6305 continue;
6306
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006307 atomic_inc(&clp->cl_refcount);
Jeff Layton42690672014-07-25 07:34:20 -04006308 unhash_delegation_locked(dp);
6309 list_add(&dp->dl_recall_lru, victims);
Jeff Laytondff13992014-07-08 14:02:49 -04006310 }
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006311 ++count;
6312 /*
6313 * Despite the fact that these functions deal with
6314 * 64-bit integers for "count", we must ensure that
6315 * it doesn't blow up the clp->cl_refcount. Throw a
6316 * warning if we start to approach INT_MAX here.
6317 */
6318 WARN_ON_ONCE(count == (INT_MAX / 2));
6319 if (count == max)
Bryan Schumaker269de302012-11-29 11:40:42 -05006320 break;
6321 }
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006322 spin_unlock(&state_lock);
Bryan Schumaker269de302012-11-29 11:40:42 -05006323 return count;
6324}
6325
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006326static u64
6327nfsd_print_client_delegations(struct nfs4_client *clp)
Bryan Schumaker269de302012-11-29 11:40:42 -05006328{
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006329 u64 count = nfsd_find_all_delegations(clp, 0, NULL);
Bryan Schumaker184c1842012-11-29 11:40:44 -05006330
6331 nfsd_print_count(clp, count, "delegations");
6332 return count;
6333}
6334
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006335u64
Jeff Layton285abde2014-07-30 08:27:24 -04006336nfsd_inject_print_delegations(void)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006337{
6338 struct nfs4_client *clp;
6339 u64 count = 0;
6340 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6341 nfsd_net_id);
6342
6343 if (!nfsd_netns_ready(nn))
6344 return 0;
6345
6346 spin_lock(&nn->client_lock);
6347 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6348 count += nfsd_print_client_delegations(clp);
6349 spin_unlock(&nn->client_lock);
6350
6351 return count;
6352}
6353
6354static void
6355nfsd_forget_delegations(struct list_head *reaplist)
6356{
6357 struct nfs4_client *clp;
6358 struct nfs4_delegation *dp, *next;
6359
6360 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6361 list_del_init(&dp->dl_recall_lru);
6362 clp = dp->dl_stid.sc_client;
6363 revoke_delegation(dp);
6364 put_client(clp);
6365 }
6366}
6367
6368u64
Jeff Layton285abde2014-07-30 08:27:24 -04006369nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr,
6370 size_t addr_size)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006371{
6372 u64 count = 0;
6373 struct nfs4_client *clp;
6374 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6375 nfsd_net_id);
6376 LIST_HEAD(reaplist);
6377
6378 if (!nfsd_netns_ready(nn))
6379 return count;
6380
6381 spin_lock(&nn->client_lock);
6382 clp = nfsd_find_client(addr, addr_size);
6383 if (clp)
6384 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6385 spin_unlock(&nn->client_lock);
6386
6387 nfsd_forget_delegations(&reaplist);
6388 return count;
6389}
6390
6391u64
Jeff Layton285abde2014-07-30 08:27:24 -04006392nfsd_inject_forget_delegations(u64 max)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006393{
6394 u64 count = 0;
6395 struct nfs4_client *clp;
6396 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6397 nfsd_net_id);
6398 LIST_HEAD(reaplist);
6399
6400 if (!nfsd_netns_ready(nn))
6401 return count;
6402
6403 spin_lock(&nn->client_lock);
6404 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6405 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6406 if (max != 0 && count >= max)
6407 break;
6408 }
6409 spin_unlock(&nn->client_lock);
6410 nfsd_forget_delegations(&reaplist);
6411 return count;
6412}
6413
6414static void
6415nfsd_recall_delegations(struct list_head *reaplist)
6416{
6417 struct nfs4_client *clp;
6418 struct nfs4_delegation *dp, *next;
6419
6420 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6421 list_del_init(&dp->dl_recall_lru);
6422 clp = dp->dl_stid.sc_client;
6423 /*
6424 * We skipped all entries that had a zero dl_time before,
6425 * so we can now reset the dl_time back to 0. If a delegation
6426 * break comes in now, then it won't make any difference since
6427 * we're recalling it either way.
6428 */
6429 spin_lock(&state_lock);
6430 dp->dl_time = 0;
6431 spin_unlock(&state_lock);
6432 nfsd_break_one_deleg(dp);
6433 put_client(clp);
6434 }
6435}
6436
6437u64
Jeff Layton285abde2014-07-30 08:27:24 -04006438nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr,
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006439 size_t addr_size)
6440{
6441 u64 count = 0;
6442 struct nfs4_client *clp;
6443 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6444 nfsd_net_id);
6445 LIST_HEAD(reaplist);
6446
6447 if (!nfsd_netns_ready(nn))
6448 return count;
6449
6450 spin_lock(&nn->client_lock);
6451 clp = nfsd_find_client(addr, addr_size);
6452 if (clp)
6453 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6454 spin_unlock(&nn->client_lock);
6455
6456 nfsd_recall_delegations(&reaplist);
6457 return count;
6458}
6459
6460u64
Jeff Layton285abde2014-07-30 08:27:24 -04006461nfsd_inject_recall_delegations(u64 max)
Jeff Layton98d5c7c2014-07-30 08:27:23 -04006462{
6463 u64 count = 0;
6464 struct nfs4_client *clp, *next;
6465 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6466 nfsd_net_id);
6467 LIST_HEAD(reaplist);
6468
6469 if (!nfsd_netns_ready(nn))
6470 return count;
6471
6472 spin_lock(&nn->client_lock);
6473 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6474 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6475 if (max != 0 && ++count >= max)
6476 break;
6477 }
6478 spin_unlock(&nn->client_lock);
6479 nfsd_recall_delegations(&reaplist);
6480 return count;
6481}
Bryan Schumaker65178db2011-11-01 13:35:21 -04006482#endif /* CONFIG_NFSD_FAULT_INJECTION */
6483
Meelap Shahc2f1a552007-07-17 04:04:39 -07006484/*
6485 * Since the lifetime of a delegation isn't limited to that of an open, a
6486 * client may quite reasonably hang on to a delegation as long as it has
6487 * the inode cached. This becomes an obvious problem the first time a
6488 * client's inode cache approaches the size of the server's total memory.
6489 *
6490 * For now we avoid this problem by imposing a hard limit on the number
6491 * of delegations, which varies according to the server's memory size.
6492 */
6493static void
6494set_max_delegations(void)
6495{
6496 /*
6497 * Allow at most 4 delegations per megabyte of RAM. Quick
6498 * estimates suggest that in the worst case (where every delegation
6499 * is for a different inode), a delegation could take about 1.5K,
6500 * giving a worst case usage of about 6% of memory.
6501 */
6502 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
6503}
6504
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006505static int nfs4_state_create_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006506{
6507 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6508 int i;
6509
6510 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6511 CLIENT_HASH_SIZE, GFP_KERNEL);
6512 if (!nn->conf_id_hashtbl)
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006513 goto err;
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006514 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6515 CLIENT_HASH_SIZE, GFP_KERNEL);
6516 if (!nn->unconf_id_hashtbl)
6517 goto err_unconf_id;
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006518 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
6519 SESSION_HASH_SIZE, GFP_KERNEL);
6520 if (!nn->sessionid_hashtbl)
6521 goto err_sessionid;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006522
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006523 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006524 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006525 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006526 }
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006527 for (i = 0; i < SESSION_HASH_SIZE; i++)
6528 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006529 nn->conf_name_tree = RB_ROOT;
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006530 nn->unconf_name_tree = RB_ROOT;
Stanislav Kinsbursky5ed58bb2012-11-14 18:21:56 +03006531 INIT_LIST_HEAD(&nn->client_lru);
Stanislav Kinsbursky73758fed2012-11-14 18:22:01 +03006532 INIT_LIST_HEAD(&nn->close_lru);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04006533 INIT_LIST_HEAD(&nn->del_recall_lru);
Stanislav Kinsburskyc9a49622012-11-26 15:21:58 +03006534 spin_lock_init(&nn->client_lock);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006535
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006536 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006537 get_net(net);
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006538
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006539 return 0;
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006540
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006541err_sessionid:
Stanislav Kinsbursky9b531132012-11-14 18:21:41 +03006542 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006543err_unconf_id:
6544 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky382a62e2012-11-14 18:21:26 +03006545err:
6546 return -ENOMEM;
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006547}
6548
6549static void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006550nfs4_state_destroy_net(struct net *net)
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006551{
6552 int i;
6553 struct nfs4_client *clp = NULL;
6554 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6555
6556 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6557 while (!list_empty(&nn->conf_id_hashtbl[i])) {
6558 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6559 destroy_client(clp);
6560 }
6561 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006562
Kinglong Mee2b905632014-03-26 22:09:30 +08006563 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6564 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
6565 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6566 destroy_client(clp);
6567 }
Stanislav Kinsburskya99454a2012-11-14 18:21:36 +03006568 }
6569
Stanislav Kinsbursky1872de02012-11-14 18:21:51 +03006570 kfree(nn->sessionid_hashtbl);
Stanislav Kinsbursky0a7ec372012-11-14 18:21:31 +03006571 kfree(nn->unconf_id_hashtbl);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006572 kfree(nn->conf_id_hashtbl);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006573 put_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006574}
6575
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03006576int
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006577nfs4_state_start_net(struct net *net)
NeilBrownac4d8ff22005-06-23 22:03:30 -07006578{
Stanislav Kinsbursky5e1533c2012-07-25 16:56:58 +04006579 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006580 int ret;
6581
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006582 ret = nfs4_state_create_net(net);
Stanislav Kinsbursky8daae4d2012-11-14 18:21:21 +03006583 if (ret)
6584 return ret;
Stanislav Kinsbursky2c142ba2012-07-25 16:57:45 +04006585 nn->boot_time = get_seconds();
Stanislav Kinsburskya51c84e2012-07-25 16:57:37 +04006586 nn->grace_ended = false;
Jeff Laytond4318ac2014-09-12 16:40:21 -04006587 locks_start_grace(net, &nn->nfsd4_manager);
6588 nfsd4_client_tracking_init(net);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006589 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03006590 nn->nfsd4_grace, net);
6591 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006592 return 0;
6593}
6594
6595/* initialization to perform when the nfsd service is started: */
6596
6597int
6598nfs4_state_start(void)
6599{
6600 int ret;
6601
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006602 ret = set_callback_cred();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006603 if (ret)
6604 return -ENOMEM;
NeilBrown58da2822005-06-23 22:03:19 -07006605 laundry_wq = create_singlethread_workqueue("nfsd4");
Jeff Laytona6d6b782012-03-05 11:42:36 -05006606 if (laundry_wq == NULL) {
6607 ret = -ENOMEM;
6608 goto out_recovery;
6609 }
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006610 ret = nfsd4_create_callback_queue();
6611 if (ret)
6612 goto out_free_laundry;
Stanislav Kinsbursky09121282012-11-14 18:22:17 +03006613
Meelap Shahc2f1a552007-07-17 04:04:39 -07006614 set_max_delegations();
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006615
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006616 return 0;
Stanislav Kinsburskyd85ed442012-11-26 15:22:13 +03006617
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006618out_free_laundry:
6619 destroy_workqueue(laundry_wq);
Jeff Laytona6d6b782012-03-05 11:42:36 -05006620out_recovery:
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -05006621 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006622}
6623
Stanislav Kinsburskyf252bc62012-11-26 15:22:18 +03006624void
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006625nfs4_state_shutdown_net(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006626{
Linus Torvalds1da177e2005-04-16 15:20:36 -07006627 struct nfs4_delegation *dp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006628 struct list_head *pos, *next, reaplist;
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006629 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006630
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006631 cancel_delayed_work_sync(&nn->laundromat_work);
6632 locks_end_grace(&nn->nfsd4_manager);
Jeff Laytonac55fdc2012-11-12 15:00:56 -05006633
Linus Torvalds1da177e2005-04-16 15:20:36 -07006634 INIT_LIST_HEAD(&reaplist);
Benny Halevycdc97502014-05-30 09:09:30 -04006635 spin_lock(&state_lock);
J. Bruce Fieldse8c69d12013-03-21 15:19:33 -04006636 list_for_each_safe(pos, next, &nn->del_recall_lru) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006637 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Jeff Layton42690672014-07-25 07:34:20 -04006638 unhash_delegation_locked(dp);
6639 list_add(&dp->dl_recall_lru, &reaplist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006640 }
Benny Halevycdc97502014-05-30 09:09:30 -04006641 spin_unlock(&state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006642 list_for_each_safe(pos, next, &reaplist) {
6643 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
Jeff Layton42690672014-07-25 07:34:20 -04006644 list_del_init(&dp->dl_recall_lru);
Sachin Bhamare8287f002015-04-27 14:50:14 +02006645 put_clnt_odstate(dp->dl_clnt_odstate);
Jeff Laytonafbda402014-08-09 10:22:41 -04006646 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
Trond Myklebust60116952014-07-29 21:34:06 -04006647 nfs4_put_stid(&dp->dl_stid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006648 }
6649
Stanislav Kinsbursky3320fef192012-11-14 18:22:07 +03006650 nfsd4_client_tracking_exit(net);
Stanislav Kinsbursky4dce0ac2012-11-26 15:22:08 +03006651 nfs4_state_destroy_net(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006652}
6653
6654void
6655nfs4_state_shutdown(void)
6656{
NeilBrown5e8d5c22006-04-10 22:55:37 -07006657 destroy_workqueue(laundry_wq);
J. Bruce Fieldsc3935e32010-06-04 16:42:08 -04006658 nfsd4_destroy_callback_queue();
Linus Torvalds1da177e2005-04-16 15:20:36 -07006659}
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006660
6661static void
6662get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
6663{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01006664 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
6665 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006666}
6667
6668static void
6669put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
6670{
Tigran Mkrtchyan37c593c2012-02-13 22:55:32 +01006671 if (cstate->minorversion) {
6672 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
6673 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
6674 }
6675}
6676
6677void
6678clear_current_stateid(struct nfsd4_compound_state *cstate)
6679{
6680 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006681}
6682
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006683/*
6684 * functions to set current state id
6685 */
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006686void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01006687nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
6688{
6689 put_stateid(cstate, &odp->od_stateid);
6690}
6691
6692void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006693nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
6694{
6695 put_stateid(cstate, &open->op_stateid);
6696}
6697
6698void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006699nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
6700{
6701 put_stateid(cstate, &close->cl_stateid);
6702}
6703
6704void
6705nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
6706{
6707 put_stateid(cstate, &lock->lk_resp_stateid);
6708}
6709
6710/*
6711 * functions to consume current state id
6712 */
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01006713
6714void
Tigran Mkrtchyan9428fe12012-02-13 22:55:31 +01006715nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
6716{
6717 get_stateid(cstate, &odp->od_stateid);
6718}
6719
6720void
6721nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
6722{
6723 get_stateid(cstate, &drp->dr_stateid);
6724}
6725
6726void
Tigran Mkrtchyan1e97b512012-02-13 22:55:30 +01006727nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
6728{
6729 get_stateid(cstate, &fsp->fr_stateid);
6730}
6731
6732void
6733nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
6734{
6735 get_stateid(cstate, &setattr->sa_stateid);
6736}
6737
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006738void
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006739nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
6740{
6741 get_stateid(cstate, &close->cl_stateid);
6742}
6743
6744void
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006745nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006746{
Tigran Mkrtchyan62cd4a52012-02-13 22:55:25 +01006747 get_stateid(cstate, &locku->lu_stateid);
Tigran Mkrtchyan8b704842012-02-13 22:55:24 +01006748}
Tigran Mkrtchyan30813e22012-02-13 22:55:26 +01006749
6750void
6751nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
6752{
6753 get_stateid(cstate, &read->rd_stateid);
6754}
6755
6756void
6757nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
6758{
6759 get_stateid(cstate, &write->wr_stateid);
6760}