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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * 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 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 | 50 | #include "netns.h" |
9cf514cc | 51 | #include "pnfs.h" |
5e1533c7 | 52 | |
1da177e4 LT |
53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
54 | ||
f32f3c2d BF |
55 | #define all_ones {{~0,~0},~0} |
56 | static const stateid_t one_stateid = { | |
57 | .si_generation = ~0, | |
58 | .si_opaque = all_ones, | |
59 | }; | |
60 | static const stateid_t zero_stateid = { | |
61 | /* all fields zero */ | |
62 | }; | |
19ff0f28 TM |
63 | static const stateid_t currentstateid = { |
64 | .si_generation = 1, | |
65 | }; | |
f32f3c2d | 66 | |
ec6b5d7b | 67 | static u64 current_sessionid = 1; |
fd39ca9a | 68 | |
f32f3c2d BF |
69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 71 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 72 | |
1da177e4 | 73 | /* forward declarations */ |
f9c00c3a | 74 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 75 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 76 | |
8b671b80 BF |
77 | /* Locking: */ |
78 | ||
8b671b80 BF |
79 | /* |
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 | */ | |
cdc97505 | 84 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 85 | |
b401be22 JL |
86 | /* |
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 | */ | |
90 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
91 | ||
abf1135b CH |
92 | static struct kmem_cache *openowner_slab; |
93 | static struct kmem_cache *lockowner_slab; | |
94 | static struct kmem_cache *file_slab; | |
95 | static struct kmem_cache *stateid_slab; | |
96 | static struct kmem_cache *deleg_slab; | |
8287f009 | 97 | static struct kmem_cache *odstate_slab; |
e60d4398 | 98 | |
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
c4cb8974 | 101 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
0162ac2b | 102 | |
f0f51f5c | 103 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 104 | { |
f0f51f5c | 105 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
106 | } |
107 | ||
f0f51f5c | 108 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 109 | { |
f0f51f5c | 110 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
111 | return nfserr_jukebox; |
112 | ses->se_flags |= NFS4_SESSION_DEAD; | |
113 | return nfs_ok; | |
508dc6e1 BH |
114 | } |
115 | ||
221a6876 BF |
116 | static bool is_client_expired(struct nfs4_client *clp) |
117 | { | |
118 | return clp->cl_time == 0; | |
119 | } | |
120 | ||
221a6876 BF |
121 | static __be32 get_client_locked(struct nfs4_client *clp) |
122 | { | |
0a880a28 TM |
123 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
124 | ||
125 | lockdep_assert_held(&nn->client_lock); | |
126 | ||
221a6876 BF |
127 | 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 */ | |
134 | static inline void | |
135 | renew_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 | ||
ba138435 | 155 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 156 | { |
0a880a28 TM |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
158 | ||
159 | lockdep_assert_held(&nn->client_lock); | |
160 | ||
221a6876 BF |
161 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
162 | return; | |
163 | if (!is_client_expired(clp)) | |
164 | renew_client_locked(clp); | |
165 | } | |
166 | ||
4b24ca7d JL |
167 | static void put_client_renew(struct nfs4_client *clp) |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
d6c249b4 JL |
171 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
172 | return; | |
173 | if (!is_client_expired(clp)) | |
174 | renew_client_locked(clp); | |
4b24ca7d JL |
175 | spin_unlock(&nn->client_lock); |
176 | } | |
177 | ||
d4e19e70 TM |
178 | static __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 | ||
191 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
192 | { | |
193 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
194 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
195 | ||
196 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
197 | |
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 | ||
203 | static 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 | ||
b5971afa KM |
213 | static inline struct nfs4_stateowner * |
214 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
215 | { | |
216 | atomic_inc(&sop->so_count); | |
217 | return sop; | |
218 | } | |
219 | ||
7ffb5880 | 220 | static int |
d4f0489f | 221 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
222 | { |
223 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 224 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
225 | } |
226 | ||
227 | static struct nfs4_openowner * | |
228 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 229 | struct nfs4_client *clp) |
7ffb5880 TM |
230 | { |
231 | struct nfs4_stateowner *so; | |
7ffb5880 | 232 | |
d4f0489f | 233 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 234 | |
d4f0489f TM |
235 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
236 | so_strhash) { | |
7ffb5880 TM |
237 | if (!so->so_is_open_owner) |
238 | continue; | |
b5971afa KM |
239 | if (same_owner_str(so, &open->op_owner)) |
240 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
241 | } |
242 | return NULL; | |
243 | } | |
244 | ||
245 | static struct nfs4_openowner * | |
246 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 247 | struct nfs4_client *clp) |
7ffb5880 TM |
248 | { |
249 | struct nfs4_openowner *oo; | |
250 | ||
d4f0489f TM |
251 | spin_lock(&clp->cl_lock); |
252 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
253 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
254 | return oo; |
255 | } | |
256 | ||
1da177e4 LT |
257 | static inline u32 |
258 | opaque_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 | ||
5b095e99 | 270 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 271 | { |
5b095e99 JL |
272 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
273 | ||
274 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
275 | } |
276 | ||
e6ba76e1 | 277 | void |
13cd2184 N |
278 | put_nfs4_file(struct nfs4_file *fi) |
279 | { | |
02e1215f JL |
280 | might_lock(&state_lock); |
281 | ||
cdc97505 | 282 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 283 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 284 | spin_unlock(&state_lock); |
8287f009 | 285 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
286 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
287 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 288 | } |
13cd2184 N |
289 | } |
290 | ||
de18643d TM |
291 | static 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 | ||
299 | static struct file * | |
300 | find_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 | ||
312 | static struct file * | |
313 | find_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 | ||
324 | static 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 | ||
336 | static struct file * | |
337 | find_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 | ||
4d227fca | 348 | struct file * |
de18643d TM |
349 | find_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 | ||
02a3508d | 364 | static atomic_long_t num_delegations; |
697ce9be | 365 | unsigned long max_delegations; |
ef0f3390 N |
366 | |
367 | /* | |
368 | * Open owner state (share locks) | |
369 | */ | |
370 | ||
16bfdaaf BF |
371 | /* 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) | |
ef0f3390 | 375 | |
d4f0489f | 376 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
377 | { |
378 | unsigned int ret; | |
379 | ||
380 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 381 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 382 | } |
ef0f3390 | 383 | |
ef0f3390 N |
384 | /* hash table for nfs4_file */ |
385 | #define FILE_HASH_BITS 8 | |
386 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 387 | |
ca943217 | 388 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 389 | { |
ca943217 TM |
390 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
391 | } | |
392 | ||
393 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
394 | { | |
395 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
396 | } | |
397 | ||
89876f8c | 398 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 399 | |
12659651 JL |
400 | static void |
401 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 402 | { |
7214e860 JL |
403 | lockdep_assert_held(&fp->fi_lock); |
404 | ||
12659651 JL |
405 | 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]); | |
3477565e BF |
409 | } |
410 | ||
12659651 JL |
411 | static __be32 |
412 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 413 | { |
7214e860 JL |
414 | lockdep_assert_held(&fp->fi_lock); |
415 | ||
12659651 JL |
416 | /* Does this access mode make sense? */ |
417 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
418 | return nfserr_inval; | |
419 | ||
baeb4ff0 JL |
420 | /* Does it conflict with a deny mode already set? */ |
421 | if ((access & fp->fi_share_deny) != 0) | |
422 | return nfserr_share_denied; | |
423 | ||
12659651 JL |
424 | __nfs4_file_get_access(fp, access); |
425 | return nfs_ok; | |
998db52c BF |
426 | } |
427 | ||
baeb4ff0 JL |
428 | static __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 | ||
998db52c | 447 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 448 | { |
de18643d TM |
449 | 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 | ||
6d338b51 | 455 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 456 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 457 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
458 | spin_unlock(&fp->fi_lock); |
459 | if (f1) | |
460 | fput(f1); | |
461 | if (f2) | |
462 | fput(f2); | |
f9d7562f BF |
463 | } |
464 | } | |
465 | ||
12659651 | 466 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 467 | { |
12659651 JL |
468 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
469 | ||
470 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 471 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
472 | if (access & NFS4_SHARE_ACCESS_READ) |
473 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
474 | } |
475 | ||
8287f009 SB |
476 | /* |
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 | */ | |
483 | static struct nfs4_clnt_odstate * | |
484 | alloc_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 | ||
496 | static void | |
497 | hash_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 | ||
505 | static inline void | |
506 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
507 | { | |
508 | if (co) | |
509 | atomic_inc(&co->co_odcount); | |
510 | } | |
511 | ||
512 | static void | |
513 | put_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 | ||
530 | static struct nfs4_clnt_odstate * | |
531 | find_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); | |
551 | out: | |
552 | spin_unlock(&fp->fi_lock); | |
553 | return co; | |
554 | } | |
555 | ||
cd61c522 | 556 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
6011695d | 557 | struct kmem_cache *slab) |
2a74aba7 | 558 | { |
3abdb607 | 559 | struct nfs4_stid *stid; |
6136d2b4 | 560 | int new_id; |
2a74aba7 | 561 | |
f8338834 | 562 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
563 | if (!stid) |
564 | return NULL; | |
565 | ||
4770d722 JL |
566 | 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(); | |
ebd6c707 | 571 | if (new_id < 0) |
3abdb607 | 572 | goto out_free; |
2a74aba7 | 573 | stid->sc_client = cl; |
3abdb607 BF |
574 | stid->sc_stateid.si_opaque.so_id = new_id; |
575 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 576 | /* Will be incremented before return to client: */ |
72c0b0fb | 577 | atomic_set(&stid->sc_count, 1); |
9767feb2 | 578 | spin_lock_init(&stid->sc_lock); |
996e0938 | 579 | |
996e0938 | 580 | /* |
3abdb607 BF |
581 | * It shouldn't be a problem to reuse an opaque stateid value. |
582 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
583 | * example, a stray write retransmission could be accepted by | |
584 | * the server when it should have been rejected. Therefore, | |
585 | * adopt a trick from the sctp code to attempt to maximize the | |
586 | * amount of time until an id is reused, by ensuring they always | |
587 | * "increase" (mod INT_MAX): | |
996e0938 | 588 | */ |
3abdb607 BF |
589 | return stid; |
590 | out_free: | |
2c44a234 | 591 | kmem_cache_free(slab, stid); |
3abdb607 | 592 | return NULL; |
2a74aba7 BF |
593 | } |
594 | ||
b49e084d | 595 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 596 | { |
6011695d TM |
597 | struct nfs4_stid *stid; |
598 | struct nfs4_ol_stateid *stp; | |
599 | ||
600 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
601 | if (!stid) | |
602 | return NULL; | |
603 | ||
604 | stp = openlockstateid(stid); | |
605 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
606 | return stp; | |
607 | } | |
608 | ||
609 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
610 | { | |
6011695d TM |
611 | kmem_cache_free(deleg_slab, stid); |
612 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
613 | } |
614 | ||
6282cd56 N |
615 | /* |
616 | * When we recall a delegation, we should be careful not to hand it | |
617 | * out again straight away. | |
618 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
619 | * in which the filehandles of recalled delegations are "stored". | |
620 | * If a filehandle appear in either filter, a delegation is blocked. | |
621 | * When a delegation is recalled, the filehandle is stored in the "new" | |
622 | * filter. | |
623 | * Every 30 seconds we swap the filters and clear the "new" one, | |
624 | * unless both are empty of course. | |
625 | * | |
626 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
627 | * low 3 bytes as hash-table indices. | |
628 | * | |
f54fe962 | 629 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
630 | * is used to manage concurrent access. Testing does not need the lock |
631 | * except when swapping the two filters. | |
632 | */ | |
f54fe962 | 633 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
634 | static struct bloom_pair { |
635 | int entries, old_entries; | |
636 | time_t swap_time; | |
637 | int new; /* index into 'set' */ | |
638 | DECLARE_BITMAP(set[2], 256); | |
639 | } blocked_delegations; | |
640 | ||
641 | static int delegation_blocked(struct knfsd_fh *fh) | |
642 | { | |
643 | u32 hash; | |
644 | struct bloom_pair *bd = &blocked_delegations; | |
645 | ||
646 | if (bd->entries == 0) | |
647 | return 0; | |
648 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 649 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
650 | if (seconds_since_boot() - bd->swap_time > 30) { |
651 | bd->entries -= bd->old_entries; | |
652 | bd->old_entries = bd->entries; | |
653 | memset(bd->set[bd->new], 0, | |
654 | sizeof(bd->set[0])); | |
655 | bd->new = 1-bd->new; | |
656 | bd->swap_time = seconds_since_boot(); | |
657 | } | |
f54fe962 | 658 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 659 | } |
87545899 | 660 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
661 | if (test_bit(hash&255, bd->set[0]) && |
662 | test_bit((hash>>8)&255, bd->set[0]) && | |
663 | test_bit((hash>>16)&255, bd->set[0])) | |
664 | return 1; | |
665 | ||
666 | if (test_bit(hash&255, bd->set[1]) && | |
667 | test_bit((hash>>8)&255, bd->set[1]) && | |
668 | test_bit((hash>>16)&255, bd->set[1])) | |
669 | return 1; | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | static void block_delegations(struct knfsd_fh *fh) | |
675 | { | |
676 | u32 hash; | |
677 | struct bloom_pair *bd = &blocked_delegations; | |
678 | ||
87545899 | 679 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 680 | |
f54fe962 | 681 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
682 | __set_bit(hash&255, bd->set[bd->new]); |
683 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
684 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
685 | if (bd->entries == 0) | |
686 | bd->swap_time = seconds_since_boot(); | |
687 | bd->entries += 1; | |
f54fe962 | 688 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
689 | } |
690 | ||
1da177e4 | 691 | static struct nfs4_delegation * |
8287f009 SB |
692 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
693 | struct nfs4_clnt_odstate *odstate) | |
1da177e4 LT |
694 | { |
695 | struct nfs4_delegation *dp; | |
02a3508d | 696 | long n; |
1da177e4 LT |
697 | |
698 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
699 | n = atomic_long_inc_return(&num_delegations); |
700 | if (n < 0 || n > max_delegations) | |
701 | goto out_dec; | |
6282cd56 | 702 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 703 | goto out_dec; |
996e0938 | 704 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 705 | if (dp == NULL) |
02a3508d | 706 | goto out_dec; |
6011695d TM |
707 | |
708 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
709 | /* |
710 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
711 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
712 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
713 | */ |
714 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
715 | INIT_LIST_HEAD(&dp->dl_perfile); |
716 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 717 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
718 | dp->dl_clnt_odstate = odstate; |
719 | get_clnt_odstate(odstate); | |
99c41515 | 720 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
721 | dp->dl_retries = 1; |
722 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 723 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
1da177e4 | 724 | return dp; |
02a3508d TM |
725 | out_dec: |
726 | atomic_long_dec(&num_delegations); | |
727 | return NULL; | |
1da177e4 LT |
728 | } |
729 | ||
730 | void | |
6011695d | 731 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 732 | { |
11b9164a | 733 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
734 | struct nfs4_client *clp = s->sc_client; |
735 | ||
4770d722 JL |
736 | might_lock(&clp->cl_lock); |
737 | ||
b401be22 JL |
738 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
739 | wake_up_all(&close_wq); | |
6011695d | 740 | return; |
b401be22 | 741 | } |
6011695d | 742 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 743 | spin_unlock(&clp->cl_lock); |
6011695d | 744 | s->sc_free(s); |
11b9164a TM |
745 | if (fp) |
746 | put_nfs4_file(fp); | |
1da177e4 LT |
747 | } |
748 | ||
9767feb2 JL |
749 | void |
750 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
751 | { | |
752 | stateid_t *src = &stid->sc_stateid; | |
753 | ||
754 | spin_lock(&stid->sc_lock); | |
755 | if (unlikely(++src->si_generation == 0)) | |
756 | src->si_generation = 1; | |
757 | memcpy(dst, src, sizeof(*dst)); | |
758 | spin_unlock(&stid->sc_lock); | |
759 | } | |
760 | ||
acfdf5c3 | 761 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 762 | { |
6bcc034e | 763 | struct file *filp = NULL; |
417c6629 | 764 | |
6bcc034e | 765 | spin_lock(&fp->fi_lock); |
67db1034 | 766 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
6bcc034e | 767 | swap(filp, fp->fi_deleg_file); |
6bcc034e JL |
768 | spin_unlock(&fp->fi_lock); |
769 | ||
770 | if (filp) { | |
2ab99ee1 | 771 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
6bcc034e | 772 | fput(filp); |
acfdf5c3 | 773 | } |
1da177e4 LT |
774 | } |
775 | ||
cd61c522 | 776 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 777 | { |
3abdb607 | 778 | s->sc_type = 0; |
6136d2b4 BF |
779 | } |
780 | ||
34ed9872 AE |
781 | /** |
782 | * nfs4_get_existing_delegation - Discover if this delegation already exists | |
783 | * @clp: a pointer to the nfs4_client we're granting a delegation to | |
784 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
785 | * | |
786 | * Return: | |
787 | * On success: NULL if an existing delegation was not found. | |
788 | * | |
789 | * On error: -EAGAIN if one was previously granted to this nfs4_client | |
790 | * for this nfs4_file. | |
791 | * | |
792 | */ | |
793 | ||
794 | static int | |
795 | nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) | |
796 | { | |
797 | struct nfs4_delegation *searchdp = NULL; | |
798 | struct nfs4_client *searchclp = NULL; | |
799 | ||
800 | lockdep_assert_held(&state_lock); | |
801 | lockdep_assert_held(&fp->fi_lock); | |
802 | ||
803 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
804 | searchclp = searchdp->dl_stid.sc_client; | |
805 | if (clp == searchclp) { | |
806 | return -EAGAIN; | |
807 | } | |
808 | } | |
809 | return 0; | |
810 | } | |
811 | ||
812 | /** | |
813 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
814 | * @dp: a pointer to the nfs4_delegation we are adding. | |
815 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
816 | * | |
817 | * Return: | |
818 | * On success: NULL if the delegation was successfully hashed. | |
819 | * | |
820 | * On error: -EAGAIN if one was previously granted to this | |
821 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
822 | * | |
823 | */ | |
824 | ||
825 | static int | |
931ee56c BH |
826 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
827 | { | |
34ed9872 AE |
828 | int status; |
829 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
830 | ||
cdc97505 | 831 | lockdep_assert_held(&state_lock); |
417c6629 | 832 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 833 | |
34ed9872 AE |
834 | status = nfs4_get_existing_delegation(clp, fp); |
835 | if (status) | |
836 | return status; | |
837 | ++fp->fi_delegees; | |
67cb1279 | 838 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 839 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 840 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
841 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
842 | return 0; | |
931ee56c BH |
843 | } |
844 | ||
3fcbbd24 | 845 | static bool |
42690676 | 846 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 847 | { |
11b9164a | 848 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 849 | |
42690676 JL |
850 | lockdep_assert_held(&state_lock); |
851 | ||
3fcbbd24 JL |
852 | if (list_empty(&dp->dl_perfile)) |
853 | return false; | |
854 | ||
b0fc29d6 | 855 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
856 | /* Ensure that deleg break won't try to requeue it */ |
857 | ++dp->dl_time; | |
417c6629 | 858 | spin_lock(&fp->fi_lock); |
931ee56c | 859 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 860 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
861 | list_del_init(&dp->dl_perfile); |
862 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 863 | return true; |
3bd64a5b BF |
864 | } |
865 | ||
3bd64a5b BF |
866 | static void destroy_delegation(struct nfs4_delegation *dp) |
867 | { | |
3fcbbd24 JL |
868 | bool unhashed; |
869 | ||
42690676 | 870 | spin_lock(&state_lock); |
3fcbbd24 | 871 | unhashed = unhash_delegation_locked(dp); |
42690676 | 872 | spin_unlock(&state_lock); |
3fcbbd24 JL |
873 | if (unhashed) { |
874 | put_clnt_odstate(dp->dl_clnt_odstate); | |
875 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); | |
876 | nfs4_put_stid(&dp->dl_stid); | |
877 | } | |
3bd64a5b BF |
878 | } |
879 | ||
880 | static void revoke_delegation(struct nfs4_delegation *dp) | |
881 | { | |
882 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
883 | ||
2d4a532d JL |
884 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
885 | ||
8287f009 | 886 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 JL |
887 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
888 | ||
3bd64a5b | 889 | if (clp->cl_minorversion == 0) |
6011695d | 890 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 891 | else { |
3bd64a5b | 892 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
893 | spin_lock(&clp->cl_lock); |
894 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
895 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
896 | } |
897 | } | |
898 | ||
1da177e4 LT |
899 | /* |
900 | * SETCLIENTID state | |
901 | */ | |
902 | ||
ddc04c41 BF |
903 | static unsigned int clientid_hashval(u32 id) |
904 | { | |
905 | return id & CLIENT_HASH_MASK; | |
906 | } | |
907 | ||
908 | static unsigned int clientstr_hashval(const char *name) | |
909 | { | |
910 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
911 | } | |
912 | ||
f9d7562f BF |
913 | /* |
914 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
915 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
916 | * only what share bits are currently in force, but also what | |
917 | * combinations of share bits previous opens have used. This allows us | |
918 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
919 | * return an error if the client attempt to downgrade to a combination | |
920 | * of share bits not explicable by closing some of its previous opens. | |
921 | * | |
922 | * XXX: This enforcement is actually incomplete, since we don't keep | |
923 | * track of access/deny bit combinations; so, e.g., we allow: | |
924 | * | |
925 | * OPEN allow read, deny write | |
926 | * OPEN allow both, deny none | |
927 | * DOWNGRADE allow read, deny none | |
928 | * | |
929 | * which we should reject. | |
930 | */ | |
5ae037e5 JL |
931 | static unsigned int |
932 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 933 | int i; |
5ae037e5 | 934 | unsigned int access = 0; |
f9d7562f | 935 | |
f9d7562f BF |
936 | for (i = 1; i < 4; i++) { |
937 | if (test_bit(i, &bmap)) | |
5ae037e5 | 938 | access |= i; |
f9d7562f | 939 | } |
5ae037e5 | 940 | return access; |
f9d7562f BF |
941 | } |
942 | ||
82c5ff1b JL |
943 | /* set share access for a given stateid */ |
944 | static inline void | |
945 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
946 | { | |
c11c591f JL |
947 | unsigned char mask = 1 << access; |
948 | ||
949 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
950 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
951 | } |
952 | ||
953 | /* clear share access for a given stateid */ | |
954 | static inline void | |
955 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
956 | { | |
c11c591f JL |
957 | unsigned char mask = 1 << access; |
958 | ||
959 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
960 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
961 | } |
962 | ||
963 | /* test whether a given stateid has access */ | |
964 | static inline bool | |
965 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
966 | { | |
c11c591f JL |
967 | unsigned char mask = 1 << access; |
968 | ||
969 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
970 | } |
971 | ||
ce0fc43c JL |
972 | /* set share deny for a given stateid */ |
973 | static inline void | |
c11c591f | 974 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 975 | { |
c11c591f JL |
976 | unsigned char mask = 1 << deny; |
977 | ||
978 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
979 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
980 | } |
981 | ||
982 | /* clear share deny for a given stateid */ | |
983 | static inline void | |
c11c591f | 984 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 985 | { |
c11c591f JL |
986 | unsigned char mask = 1 << deny; |
987 | ||
988 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
989 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
990 | } |
991 | ||
992 | /* test whether a given stateid is denying specific access */ | |
993 | static inline bool | |
c11c591f | 994 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 995 | { |
c11c591f JL |
996 | unsigned char mask = 1 << deny; |
997 | ||
998 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
999 | } |
1000 | ||
1001 | static int nfs4_access_to_omode(u32 access) | |
1002 | { | |
8f34a430 | 1003 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1004 | case NFS4_SHARE_ACCESS_READ: |
1005 | return O_RDONLY; | |
1006 | case NFS4_SHARE_ACCESS_WRITE: | |
1007 | return O_WRONLY; | |
1008 | case NFS4_SHARE_ACCESS_BOTH: | |
1009 | return O_RDWR; | |
1010 | } | |
063b0fb9 BF |
1011 | WARN_ON_ONCE(1); |
1012 | return O_RDONLY; | |
f9d7562f BF |
1013 | } |
1014 | ||
baeb4ff0 JL |
1015 | /* |
1016 | * A stateid that had a deny mode associated with it is being released | |
1017 | * or downgraded. Recalculate the deny mode on the file. | |
1018 | */ | |
1019 | static void | |
1020 | recalculate_deny_mode(struct nfs4_file *fp) | |
1021 | { | |
1022 | struct nfs4_ol_stateid *stp; | |
1023 | ||
1024 | spin_lock(&fp->fi_lock); | |
1025 | fp->fi_share_deny = 0; | |
1026 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1027 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1028 | spin_unlock(&fp->fi_lock); | |
1029 | } | |
1030 | ||
1031 | static void | |
1032 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1033 | { | |
1034 | int i; | |
1035 | bool change = false; | |
1036 | ||
1037 | for (i = 1; i < 4; i++) { | |
1038 | if ((i & deny) != i) { | |
1039 | change = true; | |
1040 | clear_deny(i, stp); | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* Recalculate per-file deny mode if there was a change */ | |
1045 | if (change) | |
11b9164a | 1046 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1047 | } |
1048 | ||
82c5ff1b JL |
1049 | /* release all access and file references for a given stateid */ |
1050 | static void | |
1051 | release_all_access(struct nfs4_ol_stateid *stp) | |
1052 | { | |
1053 | int i; | |
11b9164a | 1054 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1055 | |
1056 | if (fp && stp->st_deny_bmap != 0) | |
1057 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1058 | |
1059 | for (i = 1; i < 4; i++) { | |
1060 | if (test_access(i, stp)) | |
11b9164a | 1061 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1062 | clear_access(i, stp); |
1063 | } | |
1064 | } | |
1065 | ||
d50ffded KM |
1066 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1067 | { | |
1068 | kfree(sop->so_owner.data); | |
1069 | sop->so_ops->so_free(sop); | |
1070 | } | |
1071 | ||
6b180f0b JL |
1072 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1073 | { | |
a819ecc1 JL |
1074 | struct nfs4_client *clp = sop->so_client; |
1075 | ||
1076 | might_lock(&clp->cl_lock); | |
1077 | ||
1078 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1079 | return; |
8f4b54c5 | 1080 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1081 | spin_unlock(&clp->cl_lock); |
d50ffded | 1082 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1083 | } |
1084 | ||
e8568739 | 1085 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1086 | { |
11b9164a | 1087 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1088 | |
1c755dc1 JL |
1089 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1090 | ||
e8568739 JL |
1091 | if (list_empty(&stp->st_perfile)) |
1092 | return false; | |
1093 | ||
1d31a253 | 1094 | spin_lock(&fp->fi_lock); |
e8568739 | 1095 | list_del_init(&stp->st_perfile); |
1d31a253 | 1096 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1097 | list_del(&stp->st_perstateowner); |
e8568739 | 1098 | return true; |
529d7b2a BF |
1099 | } |
1100 | ||
6011695d | 1101 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1102 | { |
6011695d | 1103 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1104 | |
8287f009 | 1105 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1106 | release_all_access(stp); |
d3134b10 JL |
1107 | if (stp->st_stateowner) |
1108 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1109 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1110 | } |
1111 | ||
b49e084d | 1112 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1113 | { |
b49e084d JL |
1114 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1115 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
1116 | struct file *file; |
1117 | ||
b49e084d JL |
1118 | file = find_any_file(stp->st_stid.sc_file); |
1119 | if (file) | |
1120 | filp_close(file, (fl_owner_t)lo); | |
1121 | nfs4_free_ol_stateid(stid); | |
1122 | } | |
1123 | ||
2c41beb0 JL |
1124 | /* |
1125 | * Put the persistent reference to an already unhashed generic stateid, while | |
1126 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1127 | * reaplist for later destruction. | |
1128 | */ | |
1129 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1130 | struct list_head *reaplist) | |
1131 | { | |
1132 | struct nfs4_stid *s = &stp->st_stid; | |
1133 | struct nfs4_client *clp = s->sc_client; | |
1134 | ||
1135 | lockdep_assert_held(&clp->cl_lock); | |
1136 | ||
1137 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1138 | ||
1139 | if (!atomic_dec_and_test(&s->sc_count)) { | |
1140 | wake_up_all(&close_wq); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1145 | list_add(&stp->st_locks, reaplist); | |
1146 | } | |
1147 | ||
e8568739 | 1148 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1149 | { |
1c755dc1 JL |
1150 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1151 | ||
3c1c995c JL |
1152 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1153 | ||
1154 | list_del_init(&stp->st_locks); | |
cd61c522 | 1155 | nfs4_unhash_stid(&stp->st_stid); |
e8568739 | 1156 | return unhash_ol_stateid(stp); |
3c1c995c JL |
1157 | } |
1158 | ||
1159 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1160 | { | |
1161 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
e8568739 | 1162 | bool unhashed; |
3c1c995c JL |
1163 | |
1164 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
e8568739 | 1165 | unhashed = unhash_lock_stateid(stp); |
1c755dc1 | 1166 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
e8568739 JL |
1167 | if (unhashed) |
1168 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1169 | } |
1170 | ||
c58c6610 | 1171 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1172 | { |
d4f0489f | 1173 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1174 | |
d4f0489f | 1175 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1176 | |
8f4b54c5 JL |
1177 | list_del_init(&lo->lo_owner.so_strhash); |
1178 | } | |
1179 | ||
2c41beb0 JL |
1180 | /* |
1181 | * Free a list of generic stateids that were collected earlier after being | |
1182 | * fully unhashed. | |
1183 | */ | |
1184 | static void | |
1185 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1186 | { | |
1187 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1188 | struct nfs4_file *fp; |
2c41beb0 JL |
1189 | |
1190 | might_sleep(); | |
1191 | ||
1192 | while (!list_empty(reaplist)) { | |
1193 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1194 | st_locks); | |
1195 | list_del(&stp->st_locks); | |
fb94d766 | 1196 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1197 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1198 | if (fp) |
1199 | put_nfs4_file(fp); | |
2c41beb0 JL |
1200 | } |
1201 | } | |
1202 | ||
3c1c995c | 1203 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1204 | { |
d4f0489f | 1205 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1206 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1207 | struct list_head reaplist; |
529d7b2a | 1208 | |
3c1c995c | 1209 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1210 | |
3c1c995c JL |
1211 | spin_lock(&clp->cl_lock); |
1212 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1213 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1214 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1215 | struct nfs4_ol_stateid, st_perstateowner); |
e8568739 | 1216 | WARN_ON(!unhash_lock_stateid(stp)); |
2c41beb0 | 1217 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1218 | } |
d4f0489f | 1219 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1220 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1221 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1222 | } |
1223 | ||
d83017f9 JL |
1224 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1225 | struct list_head *reaplist) | |
3c87b9b7 TM |
1226 | { |
1227 | struct nfs4_ol_stateid *stp; | |
1228 | ||
e8568739 JL |
1229 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1230 | ||
3c87b9b7 TM |
1231 | while (!list_empty(&open_stp->st_locks)) { |
1232 | stp = list_entry(open_stp->st_locks.next, | |
1233 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1234 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1235 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1236 | } |
1237 | } | |
1238 | ||
e8568739 | 1239 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1240 | struct list_head *reaplist) |
2283963f | 1241 | { |
e8568739 JL |
1242 | bool unhashed; |
1243 | ||
2c41beb0 JL |
1244 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1245 | ||
e8568739 | 1246 | unhashed = unhash_ol_stateid(stp); |
d83017f9 | 1247 | release_open_stateid_locks(stp, reaplist); |
e8568739 | 1248 | return unhashed; |
38c387b5 BF |
1249 | } |
1250 | ||
1251 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1252 | { | |
2c41beb0 JL |
1253 | LIST_HEAD(reaplist); |
1254 | ||
1255 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1256 | if (unhash_open_stateid(stp, &reaplist)) |
1257 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1258 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1259 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1260 | } |
1261 | ||
7ffb5880 | 1262 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1263 | { |
d4f0489f | 1264 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1265 | |
d4f0489f | 1266 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1267 | |
8f4b54c5 JL |
1268 | list_del_init(&oo->oo_owner.so_strhash); |
1269 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1270 | } |
1271 | ||
f7a4d872 BF |
1272 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1273 | { | |
217526e7 JL |
1274 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1275 | nfsd_net_id); | |
1276 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1277 | |
217526e7 JL |
1278 | spin_lock(&nn->client_lock); |
1279 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1280 | if (s) { |
d3134b10 | 1281 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1282 | oo->oo_last_closed_stid = NULL; |
1283 | } | |
217526e7 JL |
1284 | spin_unlock(&nn->client_lock); |
1285 | if (s) | |
1286 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1287 | } |
1288 | ||
2c41beb0 | 1289 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1290 | { |
1291 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1292 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1293 | struct list_head reaplist; |
7ffb5880 | 1294 | |
2c41beb0 | 1295 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1296 | |
2c41beb0 JL |
1297 | spin_lock(&clp->cl_lock); |
1298 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1299 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1300 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1301 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1302 | if (unhash_open_stateid(stp, &reaplist)) |
1303 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1304 | } |
d4f0489f | 1305 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1306 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1307 | release_last_closed_stateid(oo); |
6b180f0b | 1308 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1309 | } |
1310 | ||
5282fd72 ME |
1311 | static inline int |
1312 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1313 | { | |
1314 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1315 | ||
1316 | return sid->sequence % SESSION_HASH_SIZE; | |
1317 | } | |
1318 | ||
135dd002 | 1319 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1320 | static inline void |
1321 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1322 | { | |
1323 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1324 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1325 | } | |
8f199b82 TM |
1326 | #else |
1327 | static inline void | |
1328 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1329 | { | |
1330 | } | |
1331 | #endif | |
1332 | ||
9411b1d4 BF |
1333 | /* |
1334 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1335 | * won't be used for replay. | |
1336 | */ | |
1337 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1338 | { | |
1339 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1340 | ||
1341 | if (nfserr == nfserr_replay_me) | |
1342 | return; | |
1343 | ||
1344 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1345 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1346 | return; |
1347 | } | |
1348 | if (!so) | |
1349 | return; | |
1350 | if (so->so_is_open_owner) | |
1351 | release_last_closed_stateid(openowner(so)); | |
1352 | so->so_seqid++; | |
1353 | return; | |
1354 | } | |
5282fd72 | 1355 | |
ec6b5d7b AA |
1356 | static void |
1357 | gen_sessionid(struct nfsd4_session *ses) | |
1358 | { | |
1359 | struct nfs4_client *clp = ses->se_client; | |
1360 | struct nfsd4_sessionid *sid; | |
1361 | ||
1362 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1363 | sid->clientid = clp->cl_clientid; | |
1364 | sid->sequence = current_sessionid++; | |
1365 | sid->reserved = 0; | |
1366 | } | |
1367 | ||
1368 | /* | |
a649637c AA |
1369 | * The protocol defines ca_maxresponssize_cached to include the size of |
1370 | * the rpc header, but all we need to cache is the data starting after | |
1371 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1372 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1373 | * value that is the number of bytes in our cache plus a few additional | |
1374 | * bytes. In order to stay on the safe side, and not promise more than | |
1375 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1376 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1377 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1378 | * for the SEQUENCE op response: | |
1379 | */ | |
1380 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1381 | ||
557ce264 AA |
1382 | static void |
1383 | free_session_slots(struct nfsd4_session *ses) | |
1384 | { | |
1385 | int i; | |
1386 | ||
1387 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1388 | kfree(ses->se_slots[i]); | |
1389 | } | |
1390 | ||
a649637c | 1391 | /* |
efe0cb6d BF |
1392 | * We don't actually need to cache the rpc and session headers, so we |
1393 | * can allocate a little less for each slot: | |
1394 | */ | |
55c760cf | 1395 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1396 | { |
55c760cf | 1397 | u32 size; |
efe0cb6d | 1398 | |
55c760cf BF |
1399 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1400 | size = 0; | |
1401 | else | |
1402 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1403 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1404 | } |
ec6b5d7b | 1405 | |
5b6feee9 BF |
1406 | /* |
1407 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1408 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1409 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1410 | */ |
55c760cf | 1411 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1412 | { |
55c760cf BF |
1413 | u32 slotsize = slot_bytes(ca); |
1414 | u32 num = ca->maxreqs; | |
5b6feee9 | 1415 | int avail; |
ec6b5d7b | 1416 | |
5b6feee9 | 1417 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1418 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1419 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1420 | num = min_t(int, num, avail / slotsize); |
1421 | nfsd_drc_mem_used += num * slotsize; | |
1422 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1423 | |
5b6feee9 BF |
1424 | return num; |
1425 | } | |
ec6b5d7b | 1426 | |
55c760cf | 1427 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1428 | { |
55c760cf BF |
1429 | int slotsize = slot_bytes(ca); |
1430 | ||
4bd9b0f4 | 1431 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1432 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1433 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1434 | } |
ec6b5d7b | 1435 | |
60810e54 KM |
1436 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1437 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1438 | { |
60810e54 KM |
1439 | int numslots = fattrs->maxreqs; |
1440 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1441 | struct nfsd4_session *new; |
1442 | int mem, i; | |
a649637c | 1443 | |
5b6feee9 BF |
1444 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1445 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1446 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1447 | |
5b6feee9 BF |
1448 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1449 | if (!new) | |
1450 | return NULL; | |
557ce264 | 1451 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1452 | for (i = 0; i < numslots; i++) { |
55c760cf | 1453 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1454 | if (!new->se_slots[i]) |
557ce264 | 1455 | goto out_free; |
557ce264 | 1456 | } |
60810e54 KM |
1457 | |
1458 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1459 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1460 | ||
5b6feee9 BF |
1461 | return new; |
1462 | out_free: | |
1463 | while (i--) | |
1464 | kfree(new->se_slots[i]); | |
1465 | kfree(new); | |
1466 | return NULL; | |
ec6b5d7b AA |
1467 | } |
1468 | ||
19cf5c02 BF |
1469 | static void free_conn(struct nfsd4_conn *c) |
1470 | { | |
1471 | svc_xprt_put(c->cn_xprt); | |
1472 | kfree(c); | |
1473 | } | |
ec6b5d7b | 1474 | |
19cf5c02 BF |
1475 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1476 | { | |
1477 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1478 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1479 | |
19cf5c02 BF |
1480 | spin_lock(&clp->cl_lock); |
1481 | if (!list_empty(&c->cn_persession)) { | |
1482 | list_del(&c->cn_persession); | |
1483 | free_conn(c); | |
1484 | } | |
eea49806 | 1485 | nfsd4_probe_callback(clp); |
2e4b7239 | 1486 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1487 | } |
ec6b5d7b | 1488 | |
d29c374c | 1489 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1490 | { |
c7662518 | 1491 | struct nfsd4_conn *conn; |
ec6b5d7b | 1492 | |
c7662518 BF |
1493 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1494 | if (!conn) | |
db90681d | 1495 | return NULL; |
c7662518 BF |
1496 | svc_xprt_get(rqstp->rq_xprt); |
1497 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1498 | conn->cn_flags = flags; |
db90681d BF |
1499 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1500 | return conn; | |
1501 | } | |
a649637c | 1502 | |
328ead28 BF |
1503 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1504 | { | |
1505 | conn->cn_session = ses; | |
1506 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1507 | } |
1508 | ||
db90681d | 1509 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1510 | { |
db90681d | 1511 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1512 | |
c7662518 | 1513 | spin_lock(&clp->cl_lock); |
328ead28 | 1514 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1515 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1516 | } |
1517 | ||
21b75b01 | 1518 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1519 | { |
19cf5c02 | 1520 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1521 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1522 | } |
1523 | ||
e1ff371f | 1524 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1525 | { |
21b75b01 | 1526 | int ret; |
ec6b5d7b | 1527 | |
db90681d | 1528 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1529 | ret = nfsd4_register_conn(conn); |
1530 | if (ret) | |
1531 | /* oops; xprt is already down: */ | |
1532 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1533 | /* We may have gained or lost a callback channel: */ |
1534 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1535 | } |
ec6b5d7b | 1536 | |
e1ff371f | 1537 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1538 | { |
1539 | u32 dir = NFS4_CDFC4_FORE; | |
1540 | ||
e1ff371f | 1541 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1542 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1543 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1544 | } |
1545 | ||
1546 | /* must be called under client_lock */ | |
19cf5c02 | 1547 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1548 | { |
19cf5c02 BF |
1549 | struct nfs4_client *clp = s->se_client; |
1550 | struct nfsd4_conn *c; | |
ec6b5d7b | 1551 | |
19cf5c02 BF |
1552 | spin_lock(&clp->cl_lock); |
1553 | while (!list_empty(&s->se_conns)) { | |
1554 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1555 | list_del_init(&c->cn_persession); | |
1556 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1557 | |
19cf5c02 BF |
1558 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1559 | free_conn(c); | |
ec6b5d7b | 1560 | |
19cf5c02 BF |
1561 | spin_lock(&clp->cl_lock); |
1562 | } | |
1563 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1564 | } |
ec6b5d7b | 1565 | |
1377b69e BF |
1566 | static void __free_session(struct nfsd4_session *ses) |
1567 | { | |
1377b69e BF |
1568 | free_session_slots(ses); |
1569 | kfree(ses); | |
1570 | } | |
1571 | ||
66b2b9b2 | 1572 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1573 | { |
19cf5c02 | 1574 | nfsd4_del_conns(ses); |
55c760cf | 1575 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1576 | __free_session(ses); |
c7662518 BF |
1577 | } |
1578 | ||
135ae827 | 1579 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1580 | { |
a827bcb2 | 1581 | int idx; |
1872de0e | 1582 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1583 | |
ec6b5d7b AA |
1584 | new->se_client = clp; |
1585 | gen_sessionid(new); | |
ec6b5d7b | 1586 | |
c7662518 BF |
1587 | INIT_LIST_HEAD(&new->se_conns); |
1588 | ||
ac7c46f2 | 1589 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1590 | new->se_flags = cses->flags; |
8b5ce5cd | 1591 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1592 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1593 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1594 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1595 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1596 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1597 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1598 | spin_unlock(&clp->cl_lock); |
60810e54 | 1599 | |
b0d2e42c | 1600 | { |
edd76786 | 1601 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1602 | /* |
1603 | * This is a little silly; with sessions there's no real | |
1604 | * use for the callback address. Use the peer address | |
1605 | * as a reasonable default for now, but consider fixing | |
1606 | * the rpc client not to require an address in the | |
1607 | * future: | |
1608 | */ | |
edd76786 BF |
1609 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1610 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1611 | } |
ec6b5d7b AA |
1612 | } |
1613 | ||
9089f1b4 | 1614 | /* caller must hold client_lock */ |
5282fd72 | 1615 | static struct nfsd4_session * |
d4e19e70 | 1616 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1617 | { |
1618 | struct nfsd4_session *elem; | |
1619 | int idx; | |
1872de0e | 1620 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1621 | |
0a880a28 TM |
1622 | lockdep_assert_held(&nn->client_lock); |
1623 | ||
5282fd72 ME |
1624 | dump_sessionid(__func__, sessionid); |
1625 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1626 | /* Search in the appropriate list */ |
1872de0e | 1627 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1628 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1629 | NFS4_MAX_SESSIONID_LEN)) { | |
1630 | return elem; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | dprintk("%s: session not found\n", __func__); | |
1635 | return NULL; | |
1636 | } | |
1637 | ||
d4e19e70 TM |
1638 | static struct nfsd4_session * |
1639 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1640 | __be32 *ret) | |
1641 | { | |
1642 | struct nfsd4_session *session; | |
1643 | __be32 status = nfserr_badsession; | |
1644 | ||
1645 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1646 | if (!session) | |
1647 | goto out; | |
1648 | status = nfsd4_get_session_locked(session); | |
1649 | if (status) | |
1650 | session = NULL; | |
1651 | out: | |
1652 | *ret = status; | |
1653 | return session; | |
1654 | } | |
1655 | ||
9089f1b4 | 1656 | /* caller must hold client_lock */ |
7116ed6b | 1657 | static void |
5282fd72 | 1658 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1659 | { |
0a880a28 TM |
1660 | struct nfs4_client *clp = ses->se_client; |
1661 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1662 | ||
1663 | lockdep_assert_held(&nn->client_lock); | |
1664 | ||
7116ed6b | 1665 | list_del(&ses->se_hash); |
4c649378 | 1666 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1667 | list_del(&ses->se_perclnt); |
4c649378 | 1668 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1669 | } |
1670 | ||
1da177e4 LT |
1671 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1672 | static int | |
2c142baa | 1673 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1674 | { |
bbc7f33a BF |
1675 | /* |
1676 | * We're assuming the clid was not given out from a boot | |
1677 | * precisely 2^32 (about 136 years) before this one. That seems | |
1678 | * a safe assumption: | |
1679 | */ | |
1680 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1681 | return 0; |
60adfc50 | 1682 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1683 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1684 | return 1; |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * XXX Should we use a slab cache ? | |
1689 | * This type of memory management is somewhat inefficient, but we use it | |
1690 | * anyway since SETCLIENTID is not a common operation. | |
1691 | */ | |
35bba9a3 | 1692 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1693 | { |
1694 | struct nfs4_client *clp; | |
d4f0489f | 1695 | int i; |
1da177e4 | 1696 | |
35bba9a3 BF |
1697 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1698 | if (clp == NULL) | |
1699 | return NULL; | |
67114fe6 | 1700 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1701 | if (clp->cl_name.data == NULL) |
1702 | goto err_no_name; | |
1703 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1704 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1705 | if (!clp->cl_ownerstr_hashtbl) | |
1706 | goto err_no_hashtbl; | |
1707 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1708 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1709 | clp->cl_name.len = name.len; |
5694c93e TM |
1710 | INIT_LIST_HEAD(&clp->cl_sessions); |
1711 | idr_init(&clp->cl_stateids); | |
1712 | atomic_set(&clp->cl_refcount, 0); | |
1713 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1714 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1715 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1716 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1717 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1718 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1719 | #ifdef CONFIG_NFSD_PNFS |
1720 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1721 | #endif | |
5694c93e TM |
1722 | spin_lock_init(&clp->cl_lock); |
1723 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1724 | return clp; |
d4f0489f TM |
1725 | err_no_hashtbl: |
1726 | kfree(clp->cl_name.data); | |
1727 | err_no_name: | |
1728 | kfree(clp); | |
1729 | return NULL; | |
1da177e4 LT |
1730 | } |
1731 | ||
4dd86e15 | 1732 | static void |
1da177e4 LT |
1733 | free_client(struct nfs4_client *clp) |
1734 | { | |
792c95dd BF |
1735 | while (!list_empty(&clp->cl_sessions)) { |
1736 | struct nfsd4_session *ses; | |
1737 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1738 | se_perclnt); | |
1739 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1740 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1741 | free_session(ses); | |
792c95dd | 1742 | } |
4cb57e30 | 1743 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1744 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1745 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1746 | kfree(clp->cl_name.data); |
2d32b29a | 1747 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1748 | kfree(clp); |
1749 | } | |
1750 | ||
84d38ac9 | 1751 | /* must be called under the client_lock */ |
4beb345b | 1752 | static void |
84d38ac9 BH |
1753 | unhash_client_locked(struct nfs4_client *clp) |
1754 | { | |
4beb345b | 1755 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1756 | struct nfsd4_session *ses; |
1757 | ||
0a880a28 TM |
1758 | lockdep_assert_held(&nn->client_lock); |
1759 | ||
4beb345b TM |
1760 | /* Mark the client as expired! */ |
1761 | clp->cl_time = 0; | |
1762 | /* Make it invisible */ | |
1763 | if (!list_empty(&clp->cl_idhash)) { | |
1764 | list_del_init(&clp->cl_idhash); | |
1765 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1766 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1767 | else | |
1768 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1769 | } | |
1770 | list_del_init(&clp->cl_lru); | |
4c649378 | 1771 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1772 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1773 | list_del_init(&ses->se_hash); | |
4c649378 | 1774 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1775 | } |
1776 | ||
1da177e4 | 1777 | static void |
4beb345b TM |
1778 | unhash_client(struct nfs4_client *clp) |
1779 | { | |
1780 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1781 | ||
1782 | spin_lock(&nn->client_lock); | |
1783 | unhash_client_locked(clp); | |
1784 | spin_unlock(&nn->client_lock); | |
1785 | } | |
1786 | ||
97403d95 JL |
1787 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1788 | { | |
1789 | if (atomic_read(&clp->cl_refcount)) | |
1790 | return nfserr_jukebox; | |
1791 | unhash_client_locked(clp); | |
1792 | return nfs_ok; | |
1793 | } | |
1794 | ||
4beb345b TM |
1795 | static void |
1796 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1797 | { |
fe0750e5 | 1798 | struct nfs4_openowner *oo; |
1da177e4 | 1799 | struct nfs4_delegation *dp; |
1da177e4 LT |
1800 | struct list_head reaplist; |
1801 | ||
1da177e4 | 1802 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1803 | spin_lock(&state_lock); |
ea1da636 N |
1804 | while (!list_empty(&clp->cl_delegations)) { |
1805 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 1806 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 1807 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 1808 | } |
cdc97505 | 1809 | spin_unlock(&state_lock); |
1da177e4 LT |
1810 | while (!list_empty(&reaplist)) { |
1811 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1812 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 1813 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 1814 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 1815 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1816 | } |
2d4a532d | 1817 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 1818 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1819 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1820 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1821 | } |
ea1da636 | 1822 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1823 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 1824 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 1825 | release_openowner(oo); |
1da177e4 | 1826 | } |
9cf514cc | 1827 | nfsd4_return_all_client_layouts(clp); |
6ff8da08 | 1828 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1829 | if (clp->cl_cb_conn.cb_xprt) |
1830 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1831 | free_client(clp); |
1da177e4 LT |
1832 | } |
1833 | ||
4beb345b TM |
1834 | static void |
1835 | destroy_client(struct nfs4_client *clp) | |
1836 | { | |
1837 | unhash_client(clp); | |
1838 | __destroy_client(clp); | |
1839 | } | |
1840 | ||
0d22f68f BF |
1841 | static void expire_client(struct nfs4_client *clp) |
1842 | { | |
4beb345b | 1843 | unhash_client(clp); |
0d22f68f | 1844 | nfsd4_client_record_remove(clp); |
4beb345b | 1845 | __destroy_client(clp); |
0d22f68f BF |
1846 | } |
1847 | ||
35bba9a3 BF |
1848 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1849 | { | |
1850 | memcpy(target->cl_verifier.data, source->data, | |
1851 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1852 | } |
1853 | ||
35bba9a3 BF |
1854 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1855 | { | |
1da177e4 LT |
1856 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1857 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1858 | } | |
1859 | ||
03a4e1f6 | 1860 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1861 | { |
03a4e1f6 BF |
1862 | if (source->cr_principal) { |
1863 | target->cr_principal = | |
1864 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1865 | if (target->cr_principal == NULL) | |
1866 | return -ENOMEM; | |
1867 | } else | |
1868 | target->cr_principal = NULL; | |
d5497fc6 | 1869 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1870 | target->cr_uid = source->cr_uid; |
1871 | target->cr_gid = source->cr_gid; | |
1872 | target->cr_group_info = source->cr_group_info; | |
1873 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1874 | target->cr_gss_mech = source->cr_gss_mech; |
1875 | if (source->cr_gss_mech) | |
1876 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1877 | return 0; |
1da177e4 LT |
1878 | } |
1879 | ||
ef17af2a | 1880 | static int |
ac55fdc4 JL |
1881 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
1882 | { | |
ef17af2a RV |
1883 | if (o1->len < o2->len) |
1884 | return -1; | |
1885 | if (o1->len > o2->len) | |
1886 | return 1; | |
1887 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
1888 | } |
1889 | ||
35bba9a3 | 1890 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1891 | { |
a55370a3 | 1892 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1893 | } |
1894 | ||
1895 | static int | |
599e0a22 BF |
1896 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1897 | { | |
1898 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | static int | |
599e0a22 BF |
1902 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1903 | { | |
1904 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1905 | } |
1906 | ||
8fbba96e BF |
1907 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1908 | { | |
1909 | int i; | |
1910 | ||
1911 | if (g1->ngroups != g2->ngroups) | |
1912 | return false; | |
1913 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1914 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1915 | return false; |
1916 | return true; | |
1917 | } | |
1918 | ||
68eb3508 BF |
1919 | /* |
1920 | * RFC 3530 language requires clid_inuse be returned when the | |
1921 | * "principal" associated with a requests differs from that previously | |
1922 | * used. We use uid, gid's, and gss principal string as our best | |
1923 | * approximation. We also don't want to allow non-gss use of a client | |
1924 | * established using gss: in theory cr_principal should catch that | |
1925 | * change, but in practice cr_principal can be null even in the gss case | |
1926 | * since gssd doesn't always pass down a principal string. | |
1927 | */ | |
1928 | static bool is_gss_cred(struct svc_cred *cr) | |
1929 | { | |
1930 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1931 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1932 | } | |
1933 | ||
1934 | ||
5559b50a | 1935 | static bool |
599e0a22 BF |
1936 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1937 | { | |
68eb3508 | 1938 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1939 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1940 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1941 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1942 | return false; | |
1943 | if (cr1->cr_principal == cr2->cr_principal) | |
1944 | return true; | |
1945 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1946 | return false; | |
5559b50a | 1947 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1948 | } |
1949 | ||
57266a6e BF |
1950 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1951 | { | |
1952 | struct svc_cred *cr = &rqstp->rq_cred; | |
1953 | u32 service; | |
1954 | ||
c4720591 BF |
1955 | if (!cr->cr_gss_mech) |
1956 | return false; | |
57266a6e BF |
1957 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1958 | return service == RPC_GSS_SVC_INTEGRITY || | |
1959 | service == RPC_GSS_SVC_PRIVACY; | |
1960 | } | |
1961 | ||
1962 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1963 | { | |
1964 | struct svc_cred *cr = &rqstp->rq_cred; | |
1965 | ||
1966 | if (!cl->cl_mach_cred) | |
1967 | return true; | |
1968 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1969 | return false; | |
1970 | if (!svc_rqst_integrity_protected(rqstp)) | |
1971 | return false; | |
1972 | if (!cr->cr_principal) | |
1973 | return false; | |
1974 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1975 | } | |
1976 | ||
294ac32e | 1977 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 1978 | { |
ab4684d1 | 1979 | __be32 verf[2]; |
1da177e4 | 1980 | |
f419992c JL |
1981 | /* |
1982 | * This is opaque to client, so no need to byte-swap. Use | |
1983 | * __force to keep sparse happy | |
1984 | */ | |
1985 | verf[0] = (__force __be32)get_seconds(); | |
19311aa8 | 1986 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 1987 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1988 | } |
1989 | ||
294ac32e JL |
1990 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
1991 | { | |
1992 | clp->cl_clientid.cl_boot = nn->boot_time; | |
1993 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
1994 | gen_confirm(clp, nn); | |
1995 | } | |
1996 | ||
4770d722 JL |
1997 | static struct nfs4_stid * |
1998 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1999 | { |
3abdb607 BF |
2000 | struct nfs4_stid *ret; |
2001 | ||
2002 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2003 | if (!ret || !ret->sc_type) | |
2004 | return NULL; | |
2005 | return ret; | |
4d71ab87 BF |
2006 | } |
2007 | ||
4770d722 JL |
2008 | static struct nfs4_stid * |
2009 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2010 | { |
2011 | struct nfs4_stid *s; | |
4d71ab87 | 2012 | |
4770d722 JL |
2013 | spin_lock(&cl->cl_lock); |
2014 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2015 | if (s != NULL) { |
2016 | if (typemask & s->sc_type) | |
2017 | atomic_inc(&s->sc_count); | |
2018 | else | |
2019 | s = NULL; | |
2020 | } | |
4770d722 JL |
2021 | spin_unlock(&cl->cl_lock); |
2022 | return s; | |
4581d140 BF |
2023 | } |
2024 | ||
2216d449 | 2025 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2026 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2027 | { | |
2028 | struct nfs4_client *clp; | |
2029 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2030 | int ret; |
c212cecf | 2031 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
2032 | |
2033 | clp = alloc_client(name); | |
2034 | if (clp == NULL) | |
2035 | return NULL; | |
2036 | ||
03a4e1f6 BF |
2037 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2038 | if (ret) { | |
03a4e1f6 | 2039 | free_client(clp); |
03a4e1f6 | 2040 | return NULL; |
b09333c4 | 2041 | } |
0162ac2b | 2042 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
07cd4909 | 2043 | clp->cl_time = get_seconds(); |
b09333c4 | 2044 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
2045 | copy_verf(clp, verf); |
2046 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 2047 | clp->cl_cb_session = NULL; |
c212cecf | 2048 | clp->net = net; |
b09333c4 RL |
2049 | return clp; |
2050 | } | |
2051 | ||
fd39ca9a | 2052 | static void |
ac55fdc4 JL |
2053 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2054 | { | |
2055 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2056 | struct nfs4_client *clp; | |
2057 | ||
2058 | while (*new) { | |
2059 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2060 | parent = *new; | |
2061 | ||
2062 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2063 | new = &((*new)->rb_left); | |
2064 | else | |
2065 | new = &((*new)->rb_right); | |
2066 | } | |
2067 | ||
2068 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2069 | rb_insert_color(&new_clp->cl_namenode, root); | |
2070 | } | |
2071 | ||
2072 | static struct nfs4_client * | |
2073 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2074 | { | |
ef17af2a | 2075 | int cmp; |
ac55fdc4 JL |
2076 | struct rb_node *node = root->rb_node; |
2077 | struct nfs4_client *clp; | |
2078 | ||
2079 | while (node) { | |
2080 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2081 | cmp = compare_blob(&clp->cl_name, name); | |
2082 | if (cmp > 0) | |
2083 | node = node->rb_left; | |
2084 | else if (cmp < 0) | |
2085 | node = node->rb_right; | |
2086 | else | |
2087 | return clp; | |
2088 | } | |
2089 | return NULL; | |
2090 | } | |
2091 | ||
2092 | static void | |
2093 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2094 | { |
2095 | unsigned int idhashval; | |
0a7ec377 | 2096 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2097 | |
0a880a28 TM |
2098 | lockdep_assert_held(&nn->client_lock); |
2099 | ||
ac55fdc4 | 2100 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2101 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2102 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2103 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2104 | renew_client_locked(clp); |
1da177e4 LT |
2105 | } |
2106 | ||
fd39ca9a | 2107 | static void |
1da177e4 LT |
2108 | move_to_confirmed(struct nfs4_client *clp) |
2109 | { | |
2110 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2111 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2112 | |
0a880a28 TM |
2113 | lockdep_assert_held(&nn->client_lock); |
2114 | ||
1da177e4 | 2115 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2116 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2117 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2118 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2119 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2120 | renew_client_locked(clp); |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | static struct nfs4_client * | |
bfa85e83 | 2124 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2125 | { |
2126 | struct nfs4_client *clp; | |
2127 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2128 | ||
bfa85e83 | 2129 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2130 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2131 | if ((bool)clp->cl_minorversion != sessions) |
2132 | return NULL; | |
3dbacee6 | 2133 | renew_client_locked(clp); |
1da177e4 | 2134 | return clp; |
a50d2ad1 | 2135 | } |
1da177e4 LT |
2136 | } |
2137 | return NULL; | |
2138 | } | |
2139 | ||
bfa85e83 BF |
2140 | static struct nfs4_client * |
2141 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2142 | { | |
2143 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2144 | ||
0a880a28 | 2145 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2146 | return find_client_in_id_table(tbl, clid, sessions); |
2147 | } | |
2148 | ||
1da177e4 | 2149 | static struct nfs4_client * |
0a7ec377 | 2150 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2151 | { |
bfa85e83 | 2152 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2153 | |
0a880a28 | 2154 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2155 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2156 | } |
2157 | ||
6e5f15c9 | 2158 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2159 | { |
6e5f15c9 | 2160 | return clp->cl_exchange_flags != 0; |
e203d506 | 2161 | } |
a1bcecd2 | 2162 | |
28ce6054 | 2163 | static struct nfs4_client * |
382a62e7 | 2164 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2165 | { |
0a880a28 | 2166 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2167 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2168 | } |
2169 | ||
2170 | static struct nfs4_client * | |
a99454aa | 2171 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2172 | { |
0a880a28 | 2173 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2174 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2175 | } |
2176 | ||
fd39ca9a | 2177 | static void |
6f3d772f | 2178 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2179 | { |
07263f1e | 2180 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2181 | struct sockaddr *sa = svc_addr(rqstp); |
2182 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2183 | unsigned short expected_family; |
2184 | ||
2185 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2186 | if (se->se_callback_netid_len == 3 && | |
2187 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2188 | expected_family = AF_INET; | |
2189 | else if (se->se_callback_netid_len == 4 && | |
2190 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2191 | expected_family = AF_INET6; | |
2192 | else | |
1da177e4 LT |
2193 | goto out_err; |
2194 | ||
c212cecf | 2195 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2196 | se->se_callback_addr_len, |
07263f1e BF |
2197 | (struct sockaddr *)&conn->cb_addr, |
2198 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2199 | |
07263f1e | 2200 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2201 | goto out_err; |
aa9a4ec7 | 2202 | |
07263f1e BF |
2203 | if (conn->cb_addr.ss_family == AF_INET6) |
2204 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2205 | |
07263f1e BF |
2206 | conn->cb_prog = se->se_callback_prog; |
2207 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2208 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2209 | return; |
2210 | out_err: | |
07263f1e BF |
2211 | conn->cb_addr.ss_family = AF_UNSPEC; |
2212 | conn->cb_addrlen = 0; | |
849823c5 | 2213 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2214 | "will not receive delegations\n", |
2215 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2216 | ||
1da177e4 LT |
2217 | return; |
2218 | } | |
2219 | ||
074fe897 | 2220 | /* |
067e1ace | 2221 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2222 | */ |
b607664e | 2223 | static void |
074fe897 | 2224 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2225 | { |
f5236013 | 2226 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2227 | struct nfsd4_slot *slot = resp->cstate.slot; |
2228 | unsigned int base; | |
074fe897 | 2229 | |
557ce264 | 2230 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2231 | |
557ce264 AA |
2232 | slot->sl_opcnt = resp->opcnt; |
2233 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2234 | |
bf5c43c8 | 2235 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2236 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2237 | slot->sl_datalen = 0; |
bf864a31 | 2238 | return; |
074fe897 | 2239 | } |
f5236013 BF |
2240 | base = resp->cstate.data_offset; |
2241 | slot->sl_datalen = buf->len - base; | |
2242 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2243 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2244 | return; | |
074fe897 AA |
2245 | } |
2246 | ||
2247 | /* | |
abfabf8c AA |
2248 | * Encode the replay sequence operation from the slot values. |
2249 | * If cachethis is FALSE encode the uncached rep error on the next | |
2250 | * operation which sets resp->p and increments resp->opcnt for | |
2251 | * nfs4svc_encode_compoundres. | |
074fe897 | 2252 | * |
074fe897 | 2253 | */ |
abfabf8c AA |
2254 | static __be32 |
2255 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2256 | struct nfsd4_compoundres *resp) | |
074fe897 | 2257 | { |
abfabf8c AA |
2258 | struct nfsd4_op *op; |
2259 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2260 | |
abfabf8c AA |
2261 | /* Encode the replayed sequence operation */ |
2262 | op = &args->ops[resp->opcnt - 1]; | |
2263 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2264 | |
abfabf8c | 2265 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2266 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2267 | op = &args->ops[resp->opcnt++]; |
2268 | op->status = nfserr_retry_uncached_rep; | |
2269 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2270 | } |
abfabf8c | 2271 | return op->status; |
074fe897 AA |
2272 | } |
2273 | ||
2274 | /* | |
557ce264 AA |
2275 | * The sequence operation is not cached because we can use the slot and |
2276 | * session values. | |
074fe897 | 2277 | */ |
3ca2eb98 | 2278 | static __be32 |
bf864a31 AA |
2279 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2280 | struct nfsd4_sequence *seq) | |
074fe897 | 2281 | { |
557ce264 | 2282 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2283 | struct xdr_stream *xdr = &resp->xdr; |
2284 | __be32 *p; | |
074fe897 AA |
2285 | __be32 status; |
2286 | ||
557ce264 | 2287 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2288 | |
abfabf8c | 2289 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2290 | if (status) |
abfabf8c | 2291 | return status; |
074fe897 | 2292 | |
f5236013 BF |
2293 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2294 | if (!p) { | |
2295 | WARN_ON_ONCE(1); | |
2296 | return nfserr_serverfault; | |
2297 | } | |
2298 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2299 | xdr_commit_encode(xdr); | |
074fe897 | 2300 | |
557ce264 | 2301 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2302 | return slot->sl_status; |
074fe897 AA |
2303 | } |
2304 | ||
0733d213 AA |
2305 | /* |
2306 | * Set the exchange_id flags returned by the server. | |
2307 | */ | |
2308 | static void | |
2309 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2310 | { | |
9cf514cc CH |
2311 | #ifdef CONFIG_NFSD_PNFS |
2312 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2313 | #else | |
0733d213 | 2314 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2315 | #endif |
0733d213 AA |
2316 | |
2317 | /* Referrals are supported, Migration is not. */ | |
2318 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2319 | ||
2320 | /* set the wire flags to return to client. */ | |
2321 | clid->flags = new->cl_exchange_flags; | |
2322 | } | |
2323 | ||
4eaea134 BF |
2324 | static bool client_has_openowners(struct nfs4_client *clp) |
2325 | { | |
2326 | struct nfs4_openowner *oo; | |
2327 | ||
2328 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2329 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2330 | return true; | |
2331 | } | |
2332 | return false; | |
2333 | } | |
2334 | ||
631fc9ea BF |
2335 | static bool client_has_state(struct nfs4_client *clp) |
2336 | { | |
4eaea134 | 2337 | return client_has_openowners(clp) |
47e970be KM |
2338 | #ifdef CONFIG_NFSD_PNFS |
2339 | || !list_empty(&clp->cl_lo_states) | |
2340 | #endif | |
6eccece9 BF |
2341 | || !list_empty(&clp->cl_delegations) |
2342 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2343 | } |
2344 | ||
069b6ad4 AA |
2345 | __be32 |
2346 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2347 | struct nfsd4_compound_state *cstate, | |
2348 | struct nfsd4_exchange_id *exid) | |
2349 | { | |
3dbacee6 TM |
2350 | struct nfs4_client *conf, *new; |
2351 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2352 | __be32 status; |
363168b4 | 2353 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2354 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2355 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2356 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2357 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2358 | |
363168b4 | 2359 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2360 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2361 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2362 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2363 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2364 | |
a084daf5 | 2365 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2366 | return nfserr_inval; |
2367 | ||
0733d213 | 2368 | switch (exid->spa_how) { |
57266a6e BF |
2369 | case SP4_MACH_CRED: |
2370 | if (!svc_rqst_integrity_protected(rqstp)) | |
2371 | return nfserr_inval; | |
0733d213 AA |
2372 | case SP4_NONE: |
2373 | break; | |
063b0fb9 BF |
2374 | default: /* checked by xdr code */ |
2375 | WARN_ON_ONCE(1); | |
0733d213 | 2376 | case SP4_SSV: |
dd30333c | 2377 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2378 | } |
2379 | ||
5cc40fd7 TM |
2380 | new = create_client(exid->clname, rqstp, &verf); |
2381 | if (new == NULL) | |
2382 | return nfserr_jukebox; | |
2383 | ||
2dbb269d | 2384 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2385 | spin_lock(&nn->client_lock); |
382a62e7 | 2386 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2387 | if (conf) { |
83e08fd4 BF |
2388 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2389 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2390 | ||
136e658d BF |
2391 | if (update) { |
2392 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2393 | status = nfserr_inval; |
1a308118 BF |
2394 | goto out; |
2395 | } | |
57266a6e BF |
2396 | if (!mach_creds_match(conf, rqstp)) { |
2397 | status = nfserr_wrong_cred; | |
2398 | goto out; | |
2399 | } | |
136e658d | 2400 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2401 | status = nfserr_perm; |
136e658d BF |
2402 | goto out; |
2403 | } | |
2404 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2405 | status = nfserr_not_same; |
2406 | goto out; | |
2407 | } | |
136e658d BF |
2408 | /* case 6 */ |
2409 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2410 | goto out_copy; |
0733d213 | 2411 | } |
136e658d | 2412 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2413 | if (client_has_state(conf)) { |
2414 | status = nfserr_clid_inuse; | |
0733d213 AA |
2415 | goto out; |
2416 | } | |
0733d213 AA |
2417 | goto out_new; |
2418 | } | |
136e658d | 2419 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2420 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2421 | goto out_copy; |
2422 | } | |
2423 | /* case 5, client reboot */ | |
3dbacee6 | 2424 | conf = NULL; |
136e658d | 2425 | goto out_new; |
6ddbbbfe MS |
2426 | } |
2427 | ||
2dbb269d | 2428 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2429 | status = nfserr_noent; |
2430 | goto out; | |
0733d213 AA |
2431 | } |
2432 | ||
a99454aa | 2433 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2434 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2435 | unhash_client_locked(unconf); |
0733d213 | 2436 | |
2dbb269d | 2437 | /* case 1 (normal case) */ |
0733d213 | 2438 | out_new: |
fd699b8a JL |
2439 | if (conf) { |
2440 | status = mark_client_expired_locked(conf); | |
2441 | if (status) | |
2442 | goto out; | |
2443 | } | |
4f540e29 | 2444 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2445 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2446 | |
c212cecf | 2447 | gen_clid(new, nn); |
ac55fdc4 | 2448 | add_to_unconfirmed(new); |
3dbacee6 | 2449 | swap(new, conf); |
0733d213 | 2450 | out_copy: |
5cc40fd7 TM |
2451 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2452 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2453 | |
5cc40fd7 TM |
2454 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2455 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2456 | |
2457 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2458 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2459 | status = nfs_ok; |
2460 | ||
2461 | out: | |
3dbacee6 | 2462 | spin_unlock(&nn->client_lock); |
5cc40fd7 | 2463 | if (new) |
3dbacee6 TM |
2464 | expire_client(new); |
2465 | if (unconf) | |
2466 | expire_client(unconf); | |
0733d213 | 2467 | return status; |
069b6ad4 AA |
2468 | } |
2469 | ||
57b7b43b | 2470 | static __be32 |
88e588d5 | 2471 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2472 | { |
88e588d5 AA |
2473 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2474 | slot_seqid); | |
b85d4c01 BH |
2475 | |
2476 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2477 | if (slot_inuse) { |
2478 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2479 | return nfserr_jukebox; |
2480 | else | |
2481 | return nfserr_seq_misordered; | |
2482 | } | |
f6d82485 | 2483 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2484 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2485 | return nfs_ok; |
88e588d5 | 2486 | if (seqid == slot_seqid) |
b85d4c01 | 2487 | return nfserr_replay_cache; |
b85d4c01 BH |
2488 | return nfserr_seq_misordered; |
2489 | } | |
2490 | ||
49557cc7 AA |
2491 | /* |
2492 | * Cache the create session result into the create session single DRC | |
2493 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2494 | * Do this for solo or embedded create session operations. | |
2495 | */ | |
2496 | static void | |
2497 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2498 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2499 | { |
2500 | slot->sl_status = nfserr; | |
2501 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2502 | } | |
2503 | ||
2504 | static __be32 | |
2505 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2506 | struct nfsd4_clid_slot *slot) | |
2507 | { | |
2508 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2509 | return slot->sl_status; | |
2510 | } | |
2511 | ||
1b74c25b MJ |
2512 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2513 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2514 | 1 + /* MIN tag is length with zero, only length */ \ | |
2515 | 3 + /* version, opcount, opcode */ \ | |
2516 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2517 | /* seqid, slotID, slotID, cache */ \ | |
2518 | 4 ) * sizeof(__be32)) | |
2519 | ||
2520 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2521 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2522 | 1 + /* status */ \ | |
2523 | 1 + /* MIN tag is length with zero, only length */ \ | |
2524 | 3 + /* opcount, opcode, opstatus*/ \ | |
2525 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2526 | /* seqid, slotID, slotID, slotID, status */ \ | |
2527 | 5 ) * sizeof(__be32)) | |
2528 | ||
55c760cf | 2529 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2530 | { |
55c760cf BF |
2531 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2532 | ||
373cd409 BF |
2533 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2534 | return nfserr_toosmall; | |
2535 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2536 | return nfserr_toosmall; | |
55c760cf BF |
2537 | ca->headerpadsz = 0; |
2538 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2539 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2540 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2541 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2542 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2543 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2544 | /* | |
2545 | * Note decreasing slot size below client's request may make it | |
2546 | * difficult for client to function correctly, whereas | |
2547 | * decreasing the number of slots will (just?) affect | |
2548 | * performance. When short on memory we therefore prefer to | |
2549 | * decrease number of slots instead of their size. Clients that | |
2550 | * request larger slots than they need will get poor results: | |
2551 | */ | |
2552 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2553 | if (!ca->maxreqs) | |
2554 | return nfserr_jukebox; | |
2555 | ||
373cd409 | 2556 | return nfs_ok; |
1b74c25b MJ |
2557 | } |
2558 | ||
8a891633 KM |
2559 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2560 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2561 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2562 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2563 | ||
06b332a5 | 2564 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2565 | { |
06b332a5 BF |
2566 | ca->headerpadsz = 0; |
2567 | ||
2568 | /* | |
2569 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2570 | * don't even do gss on the backchannel yet. But this is still | |
2571 | * less than 1k. Tighten up this estimate in the unlikely event | |
2572 | * it turns out to be a problem for some client: | |
2573 | */ | |
8a891633 | 2574 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2575 | return nfserr_toosmall; |
8a891633 | 2576 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2577 | return nfserr_toosmall; |
2578 | ca->maxresp_cached = 0; | |
2579 | if (ca->maxops < 2) | |
2580 | return nfserr_toosmall; | |
2581 | ||
2582 | return nfs_ok; | |
1b74c25b MJ |
2583 | } |
2584 | ||
b78724b7 BF |
2585 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2586 | { | |
2587 | switch (cbs->flavor) { | |
2588 | case RPC_AUTH_NULL: | |
2589 | case RPC_AUTH_UNIX: | |
2590 | return nfs_ok; | |
2591 | default: | |
2592 | /* | |
2593 | * GSS case: the spec doesn't allow us to return this | |
2594 | * error. But it also doesn't allow us not to support | |
2595 | * GSS. | |
2596 | * I'd rather this fail hard than return some error the | |
2597 | * client might think it can already handle: | |
2598 | */ | |
2599 | return nfserr_encr_alg_unsupp; | |
2600 | } | |
2601 | } | |
2602 | ||
069b6ad4 AA |
2603 | __be32 |
2604 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2605 | struct nfsd4_compound_state *cstate, | |
2606 | struct nfsd4_create_session *cr_ses) | |
2607 | { | |
363168b4 | 2608 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2609 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2610 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2611 | struct nfsd4_session *new; |
81f0b2a4 | 2612 | struct nfsd4_conn *conn; |
49557cc7 | 2613 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2614 | __be32 status = 0; |
8daae4dc | 2615 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2616 | |
a62573dc MJ |
2617 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2618 | return nfserr_inval; | |
b78724b7 BF |
2619 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2620 | if (status) | |
2621 | return status; | |
55c760cf | 2622 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2623 | if (status) |
2624 | return status; | |
2625 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2626 | if (status) |
f403e450 | 2627 | goto out_release_drc_mem; |
81f0b2a4 | 2628 | status = nfserr_jukebox; |
60810e54 | 2629 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2630 | if (!new) |
2631 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2632 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2633 | if (!conn) | |
2634 | goto out_free_session; | |
a62573dc | 2635 | |
d20c11d8 | 2636 | spin_lock(&nn->client_lock); |
0a7ec377 | 2637 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2638 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2639 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2640 | |
2641 | if (conf) { | |
57266a6e BF |
2642 | status = nfserr_wrong_cred; |
2643 | if (!mach_creds_match(conf, rqstp)) | |
2644 | goto out_free_conn; | |
49557cc7 AA |
2645 | cs_slot = &conf->cl_cs_slot; |
2646 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
2647 | if (status) { |
2648 | if (status == nfserr_replay_cache) | |
2649 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 2650 | goto out_free_conn; |
ec6b5d7b | 2651 | } |
ec6b5d7b AA |
2652 | } else if (unconf) { |
2653 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2654 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2655 | status = nfserr_clid_inuse; |
81f0b2a4 | 2656 | goto out_free_conn; |
ec6b5d7b | 2657 | } |
57266a6e BF |
2658 | status = nfserr_wrong_cred; |
2659 | if (!mach_creds_match(unconf, rqstp)) | |
2660 | goto out_free_conn; | |
49557cc7 AA |
2661 | cs_slot = &unconf->cl_cs_slot; |
2662 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2663 | if (status) { |
2664 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2665 | status = nfserr_seq_misordered; |
81f0b2a4 | 2666 | goto out_free_conn; |
ec6b5d7b | 2667 | } |
382a62e7 | 2668 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2669 | if (old) { |
d20c11d8 | 2670 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2671 | if (status) { |
2672 | old = NULL; | |
221a6876 | 2673 | goto out_free_conn; |
7abea1e8 | 2674 | } |
221a6876 | 2675 | } |
8f9d3d3b | 2676 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2677 | conf = unconf; |
2678 | } else { | |
2679 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2680 | goto out_free_conn; |
ec6b5d7b | 2681 | } |
81f0b2a4 | 2682 | status = nfs_ok; |
408b79bc BF |
2683 | /* |
2684 | * We do not support RDMA or persistent sessions | |
2685 | */ | |
2686 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2687 | cr_ses->flags &= ~SESSION4_RDMA; | |
2688 | ||
81f0b2a4 | 2689 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2690 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2691 | |
ac7c46f2 | 2692 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2693 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2694 | cs_slot->sl_seqid++; |
49557cc7 | 2695 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2696 | |
d20c11d8 | 2697 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2698 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2699 | spin_unlock(&nn->client_lock); |
2700 | /* init connection and backchannel */ | |
2701 | nfsd4_init_conn(rqstp, conn, new); | |
2702 | nfsd4_put_session(new); | |
d20c11d8 JL |
2703 | if (old) |
2704 | expire_client(old); | |
ec6b5d7b | 2705 | return status; |
81f0b2a4 | 2706 | out_free_conn: |
d20c11d8 | 2707 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2708 | free_conn(conn); |
d20c11d8 JL |
2709 | if (old) |
2710 | expire_client(old); | |
81f0b2a4 BF |
2711 | out_free_session: |
2712 | __free_session(new); | |
55c760cf BF |
2713 | out_release_drc_mem: |
2714 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2715 | return status; |
069b6ad4 AA |
2716 | } |
2717 | ||
1d1bc8f2 BF |
2718 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2719 | { | |
2720 | switch (*dir) { | |
2721 | case NFS4_CDFC4_FORE: | |
2722 | case NFS4_CDFC4_BACK: | |
2723 | return nfs_ok; | |
2724 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2725 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2726 | *dir = NFS4_CDFC4_BOTH; | |
2727 | return nfs_ok; | |
2728 | }; | |
2729 | return nfserr_inval; | |
2730 | } | |
2731 | ||
cb73a9f4 BF |
2732 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2733 | { | |
2734 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2735 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2736 | __be32 status; |
cb73a9f4 | 2737 | |
b78724b7 BF |
2738 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2739 | if (status) | |
2740 | return status; | |
c9a49628 | 2741 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2742 | session->se_cb_prog = bc->bc_cb_program; |
2743 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2744 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2745 | |
2746 | nfsd4_probe_callback(session->se_client); | |
2747 | ||
2748 | return nfs_ok; | |
2749 | } | |
2750 | ||
1d1bc8f2 BF |
2751 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2752 | struct nfsd4_compound_state *cstate, | |
2753 | struct nfsd4_bind_conn_to_session *bcts) | |
2754 | { | |
2755 | __be32 status; | |
3ba63671 | 2756 | struct nfsd4_conn *conn; |
4f6e6c17 | 2757 | struct nfsd4_session *session; |
d4e19e70 TM |
2758 | struct net *net = SVC_NET(rqstp); |
2759 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2760 | |
2761 | if (!nfsd4_last_compound_op(rqstp)) | |
2762 | return nfserr_not_only_op; | |
c9a49628 | 2763 | spin_lock(&nn->client_lock); |
d4e19e70 | 2764 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2765 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2766 | if (!session) |
d4e19e70 | 2767 | goto out_no_session; |
57266a6e BF |
2768 | status = nfserr_wrong_cred; |
2769 | if (!mach_creds_match(session->se_client, rqstp)) | |
2770 | goto out; | |
1d1bc8f2 | 2771 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2772 | if (status) |
4f6e6c17 | 2773 | goto out; |
3ba63671 | 2774 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2775 | status = nfserr_jukebox; |
3ba63671 | 2776 | if (!conn) |
4f6e6c17 BF |
2777 | goto out; |
2778 | nfsd4_init_conn(rqstp, conn, session); | |
2779 | status = nfs_ok; | |
2780 | out: | |
d4e19e70 TM |
2781 | nfsd4_put_session(session); |
2782 | out_no_session: | |
4f6e6c17 | 2783 | return status; |
1d1bc8f2 BF |
2784 | } |
2785 | ||
5d4cec2f BF |
2786 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2787 | { | |
2788 | if (!session) | |
2789 | return 0; | |
2790 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2791 | } | |
2792 | ||
069b6ad4 AA |
2793 | __be32 |
2794 | nfsd4_destroy_session(struct svc_rqst *r, | |
2795 | struct nfsd4_compound_state *cstate, | |
2796 | struct nfsd4_destroy_session *sessionid) | |
2797 | { | |
e10e0cfc | 2798 | struct nfsd4_session *ses; |
abcdff09 | 2799 | __be32 status; |
f0f51f5c | 2800 | int ref_held_by_me = 0; |
d4e19e70 TM |
2801 | struct net *net = SVC_NET(r); |
2802 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2803 | |
abcdff09 | 2804 | status = nfserr_not_only_op; |
5d4cec2f | 2805 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2806 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2807 | goto out; |
f0f51f5c | 2808 | ref_held_by_me++; |
57716355 | 2809 | } |
e10e0cfc | 2810 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2811 | spin_lock(&nn->client_lock); |
d4e19e70 | 2812 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2813 | if (!ses) |
2814 | goto out_client_lock; | |
57266a6e BF |
2815 | status = nfserr_wrong_cred; |
2816 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2817 | goto out_put_session; |
f0f51f5c | 2818 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2819 | if (status) |
f0f51f5c | 2820 | goto out_put_session; |
e10e0cfc | 2821 | unhash_session(ses); |
c9a49628 | 2822 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2823 | |
84f5f7cc | 2824 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2825 | |
c9a49628 | 2826 | spin_lock(&nn->client_lock); |
e10e0cfc | 2827 | status = nfs_ok; |
f0f51f5c | 2828 | out_put_session: |
d4e19e70 | 2829 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2830 | out_client_lock: |
2831 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2832 | out: |
e10e0cfc | 2833 | return status; |
069b6ad4 AA |
2834 | } |
2835 | ||
a663bdd8 | 2836 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2837 | { |
2838 | struct nfsd4_conn *c; | |
2839 | ||
2840 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2841 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2842 | return c; |
2843 | } | |
2844 | } | |
2845 | return NULL; | |
2846 | } | |
2847 | ||
57266a6e | 2848 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2849 | { |
2850 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2851 | struct nfsd4_conn *c; |
57266a6e | 2852 | __be32 status = nfs_ok; |
21b75b01 | 2853 | int ret; |
328ead28 BF |
2854 | |
2855 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2856 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2857 | if (c) |
2858 | goto out_free; | |
2859 | status = nfserr_conn_not_bound_to_session; | |
2860 | if (clp->cl_mach_cred) | |
2861 | goto out_free; | |
328ead28 BF |
2862 | __nfsd4_hash_conn(new, ses); |
2863 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2864 | ret = nfsd4_register_conn(new); |
2865 | if (ret) | |
2866 | /* oops; xprt is already down: */ | |
2867 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2868 | return nfs_ok; |
2869 | out_free: | |
2870 | spin_unlock(&clp->cl_lock); | |
2871 | free_conn(new); | |
2872 | return status; | |
328ead28 BF |
2873 | } |
2874 | ||
868b89c3 MJ |
2875 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2876 | { | |
2877 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2878 | ||
2879 | return args->opcnt > session->se_fchannel.maxops; | |
2880 | } | |
2881 | ||
ae82a8d0 MJ |
2882 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2883 | struct nfsd4_session *session) | |
2884 | { | |
2885 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2886 | ||
2887 | return xb->len > session->se_fchannel.maxreq_sz; | |
2888 | } | |
2889 | ||
069b6ad4 | 2890 | __be32 |
b85d4c01 | 2891 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2892 | struct nfsd4_compound_state *cstate, |
2893 | struct nfsd4_sequence *seq) | |
2894 | { | |
f9bb94c4 | 2895 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2896 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2897 | struct nfsd4_session *session; |
221a6876 | 2898 | struct nfs4_client *clp; |
b85d4c01 | 2899 | struct nfsd4_slot *slot; |
a663bdd8 | 2900 | struct nfsd4_conn *conn; |
57b7b43b | 2901 | __be32 status; |
47ee5298 | 2902 | int buflen; |
d4e19e70 TM |
2903 | struct net *net = SVC_NET(rqstp); |
2904 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2905 | |
f9bb94c4 AA |
2906 | if (resp->opcnt != 1) |
2907 | return nfserr_sequence_pos; | |
2908 | ||
a663bdd8 BF |
2909 | /* |
2910 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2911 | * below. | |
2912 | */ | |
2913 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2914 | if (!conn) | |
2915 | return nfserr_jukebox; | |
2916 | ||
c9a49628 | 2917 | spin_lock(&nn->client_lock); |
d4e19e70 | 2918 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2919 | if (!session) |
221a6876 BF |
2920 | goto out_no_session; |
2921 | clp = session->se_client; | |
b85d4c01 | 2922 | |
868b89c3 MJ |
2923 | status = nfserr_too_many_ops; |
2924 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2925 | goto out_put_session; |
868b89c3 | 2926 | |
ae82a8d0 MJ |
2927 | status = nfserr_req_too_big; |
2928 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2929 | goto out_put_session; |
ae82a8d0 | 2930 | |
b85d4c01 | 2931 | status = nfserr_badslot; |
6c18ba9f | 2932 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2933 | goto out_put_session; |
b85d4c01 | 2934 | |
557ce264 | 2935 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2936 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2937 | ||
a8dfdaeb AA |
2938 | /* We do not negotiate the number of slots yet, so set the |
2939 | * maxslots to the session maxreqs which is used to encode | |
2940 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2941 | seq->maxslots = session->se_fchannel.maxreqs; | |
2942 | ||
73e79482 BF |
2943 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2944 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2945 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2946 | status = nfserr_seq_misordered; |
2947 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2948 | goto out_put_session; |
b85d4c01 BH |
2949 | cstate->slot = slot; |
2950 | cstate->session = session; | |
4b24ca7d | 2951 | cstate->clp = clp; |
da3846a2 | 2952 | /* Return the cached reply status and set cstate->status |
557ce264 | 2953 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2954 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2955 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2956 | goto out; |
b85d4c01 BH |
2957 | } |
2958 | if (status) | |
66b2b9b2 | 2959 | goto out_put_session; |
b85d4c01 | 2960 | |
57266a6e | 2961 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2962 | conn = NULL; |
57266a6e BF |
2963 | if (status) |
2964 | goto out_put_session; | |
328ead28 | 2965 | |
47ee5298 BF |
2966 | buflen = (seq->cachethis) ? |
2967 | session->se_fchannel.maxresp_cached : | |
2968 | session->se_fchannel.maxresp_sz; | |
2969 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2970 | nfserr_rep_too_big; | |
a5cddc88 | 2971 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2972 | goto out_put_session; |
32aaa62e | 2973 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2974 | |
2975 | status = nfs_ok; | |
b85d4c01 | 2976 | /* Success! bump slot seqid */ |
b85d4c01 | 2977 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2978 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2979 | if (seq->cachethis) |
2980 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2981 | else |
2982 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2983 | |
2984 | cstate->slot = slot; | |
2985 | cstate->session = session; | |
4b24ca7d | 2986 | cstate->clp = clp; |
b85d4c01 | 2987 | |
b85d4c01 | 2988 | out: |
221a6876 BF |
2989 | switch (clp->cl_cb_state) { |
2990 | case NFSD4_CB_DOWN: | |
2991 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2992 | break; | |
2993 | case NFSD4_CB_FAULT: | |
2994 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2995 | break; | |
2996 | default: | |
2997 | seq->status_flags = 0; | |
aaf84eb9 | 2998 | } |
3bd64a5b BF |
2999 | if (!list_empty(&clp->cl_revoked)) |
3000 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3001 | out_no_session: |
3f42d2c4 KM |
3002 | if (conn) |
3003 | free_conn(conn); | |
c9a49628 | 3004 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3005 | return status; |
66b2b9b2 | 3006 | out_put_session: |
d4e19e70 | 3007 | nfsd4_put_session_locked(session); |
221a6876 | 3008 | goto out_no_session; |
069b6ad4 AA |
3009 | } |
3010 | ||
b607664e TM |
3011 | void |
3012 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3013 | { | |
3014 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3015 | ||
3016 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3017 | if (cs->status != nfserr_replay_cache) { |
3018 | nfsd4_store_cache_entry(resp); | |
3019 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3020 | } | |
d4e19e70 | 3021 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3022 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3023 | } else if (cs->clp) |
3024 | put_client_renew(cs->clp); | |
b607664e TM |
3025 | } |
3026 | ||
345c2842 MJ |
3027 | __be32 |
3028 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
3029 | { | |
6b10ad19 TM |
3030 | struct nfs4_client *conf, *unconf; |
3031 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3032 | __be32 status = 0; |
8daae4dc | 3033 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3034 | |
6b10ad19 | 3035 | spin_lock(&nn->client_lock); |
0a7ec377 | 3036 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3037 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3038 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3039 | |
3040 | if (conf) { | |
c0293b01 | 3041 | if (client_has_state(conf)) { |
345c2842 MJ |
3042 | status = nfserr_clientid_busy; |
3043 | goto out; | |
3044 | } | |
fd699b8a JL |
3045 | status = mark_client_expired_locked(conf); |
3046 | if (status) | |
3047 | goto out; | |
6b10ad19 | 3048 | clp = conf; |
345c2842 MJ |
3049 | } else if (unconf) |
3050 | clp = unconf; | |
3051 | else { | |
3052 | status = nfserr_stale_clientid; | |
3053 | goto out; | |
3054 | } | |
57266a6e | 3055 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3056 | clp = NULL; |
57266a6e BF |
3057 | status = nfserr_wrong_cred; |
3058 | goto out; | |
3059 | } | |
6b10ad19 | 3060 | unhash_client_locked(clp); |
345c2842 | 3061 | out: |
6b10ad19 | 3062 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3063 | if (clp) |
3064 | expire_client(clp); | |
345c2842 MJ |
3065 | return status; |
3066 | } | |
3067 | ||
4dc6ec00 BF |
3068 | __be32 |
3069 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
3070 | { | |
57b7b43b | 3071 | __be32 status = 0; |
bcecf1cc | 3072 | |
4dc6ec00 BF |
3073 | if (rc->rca_one_fs) { |
3074 | if (!cstate->current_fh.fh_dentry) | |
3075 | return nfserr_nofilehandle; | |
3076 | /* | |
3077 | * We don't take advantage of the rca_one_fs case. | |
3078 | * That's OK, it's optional, we can safely ignore it. | |
3079 | */ | |
3080 | return nfs_ok; | |
3081 | } | |
bcecf1cc | 3082 | |
bcecf1cc | 3083 | status = nfserr_complete_already; |
a52d726b JL |
3084 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3085 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3086 | goto out; |
3087 | ||
3088 | status = nfserr_stale_clientid; | |
3089 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3090 | /* |
3091 | * The following error isn't really legal. | |
3092 | * But we only get here if the client just explicitly | |
3093 | * destroyed the client. Surely it no longer cares what | |
3094 | * error it gets back on an operation for the dead | |
3095 | * client. | |
3096 | */ | |
bcecf1cc MJ |
3097 | goto out; |
3098 | ||
3099 | status = nfs_ok; | |
2a4317c5 | 3100 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 3101 | out: |
bcecf1cc | 3102 | return status; |
4dc6ec00 BF |
3103 | } |
3104 | ||
b37ad28b | 3105 | __be32 |
b591480b BF |
3106 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3107 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 3108 | { |
a084daf5 | 3109 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3110 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3111 | struct nfs4_client *conf, *new; |
3112 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3113 | __be32 status; |
c212cecf SK |
3114 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3115 | ||
5cc40fd7 TM |
3116 | new = create_client(clname, rqstp, &clverifier); |
3117 | if (new == NULL) | |
3118 | return nfserr_jukebox; | |
63db4632 | 3119 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3120 | spin_lock(&nn->client_lock); |
382a62e7 | 3121 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3122 | if (conf && client_has_state(conf)) { |
63db4632 | 3123 | /* case 0: */ |
1da177e4 | 3124 | status = nfserr_clid_inuse; |
e203d506 BF |
3125 | if (clp_used_exchangeid(conf)) |
3126 | goto out; | |
026722c2 | 3127 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3128 | char addr_str[INET6_ADDRSTRLEN]; |
3129 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3130 | sizeof(addr_str)); | |
3131 | dprintk("NFSD: setclientid: string in use by client " | |
3132 | "at %s\n", addr_str); | |
1da177e4 LT |
3133 | goto out; |
3134 | } | |
1da177e4 | 3135 | } |
a99454aa | 3136 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3137 | if (unconf) |
3dbacee6 | 3138 | unhash_client_locked(unconf); |
41eb1670 | 3139 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3140 | /* case 1: probable callback update */ |
1da177e4 | 3141 | copy_clid(new, conf); |
41eb1670 KM |
3142 | gen_confirm(new, nn); |
3143 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
c212cecf | 3144 | gen_clid(new, nn); |
8323c3b2 | 3145 | new->cl_minorversion = 0; |
6f3d772f | 3146 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3147 | add_to_unconfirmed(new); |
1da177e4 LT |
3148 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3149 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3150 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3151 | new = NULL; |
1da177e4 LT |
3152 | status = nfs_ok; |
3153 | out: | |
3dbacee6 | 3154 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3155 | if (new) |
3156 | free_client(new); | |
3dbacee6 TM |
3157 | if (unconf) |
3158 | expire_client(unconf); | |
1da177e4 LT |
3159 | return status; |
3160 | } | |
3161 | ||
3162 | ||
b37ad28b | 3163 | __be32 |
b591480b BF |
3164 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
3165 | struct nfsd4_compound_state *cstate, | |
3166 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3167 | { |
21ab45a4 | 3168 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3169 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3170 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3171 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3172 | __be32 status; |
7f2210fa | 3173 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3174 | |
2c142baa | 3175 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3176 | return nfserr_stale_clientid; |
21ab45a4 | 3177 | |
d20c11d8 | 3178 | spin_lock(&nn->client_lock); |
8daae4dc | 3179 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3180 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3181 | /* |
8695b90a BF |
3182 | * We try hard to give out unique clientid's, so if we get an |
3183 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3184 | * the client may be buggy; this should never happen. |
3185 | * | |
3186 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3187 | */ |
f984a7ce | 3188 | status = nfserr_clid_inuse; |
8695b90a BF |
3189 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3190 | goto out; | |
3191 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3192 | goto out; | |
63db4632 | 3193 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3194 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3195 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3196 | status = nfs_ok; |
90d700b7 BF |
3197 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3198 | status = nfserr_stale_clientid; | |
3199 | goto out; | |
3200 | } | |
3201 | status = nfs_ok; | |
3202 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3203 | old = unconf; |
3204 | unhash_client_locked(old); | |
8695b90a | 3205 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3206 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3207 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3208 | if (old) { | |
2b634821 BF |
3209 | status = nfserr_clid_inuse; |
3210 | if (client_has_state(old) | |
3211 | && !same_creds(&unconf->cl_cred, | |
3212 | &old->cl_cred)) | |
3213 | goto out; | |
d20c11d8 | 3214 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3215 | if (status) { |
3216 | old = NULL; | |
221a6876 | 3217 | goto out; |
7abea1e8 | 3218 | } |
221a6876 | 3219 | } |
8695b90a | 3220 | move_to_confirmed(unconf); |
d20c11d8 | 3221 | conf = unconf; |
08e8987c | 3222 | } |
d20c11d8 JL |
3223 | get_client_locked(conf); |
3224 | spin_unlock(&nn->client_lock); | |
3225 | nfsd4_probe_callback(conf); | |
3226 | spin_lock(&nn->client_lock); | |
3227 | put_client_renew_locked(conf); | |
1da177e4 | 3228 | out: |
d20c11d8 JL |
3229 | spin_unlock(&nn->client_lock); |
3230 | if (old) | |
3231 | expire_client(old); | |
1da177e4 LT |
3232 | return status; |
3233 | } | |
3234 | ||
32513b40 BF |
3235 | static struct nfs4_file *nfsd4_alloc_file(void) |
3236 | { | |
3237 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3238 | } | |
3239 | ||
1da177e4 | 3240 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3241 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3242 | struct nfs4_file *fp) | |
1da177e4 | 3243 | { |
950e0118 TM |
3244 | lockdep_assert_held(&state_lock); |
3245 | ||
32513b40 | 3246 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3247 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3248 | INIT_LIST_HEAD(&fp->fi_stateids); |
3249 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 3250 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 3251 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 3252 | fp->fi_deleg_file = NULL; |
32513b40 | 3253 | fp->fi_had_conflict = false; |
baeb4ff0 | 3254 | fp->fi_share_deny = 0; |
32513b40 BF |
3255 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3256 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
3257 | #ifdef CONFIG_NFSD_PNFS |
3258 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 3259 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 3260 | #endif |
5b095e99 | 3261 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3262 | } |
3263 | ||
e8ff2a84 | 3264 | void |
1da177e4 LT |
3265 | nfsd4_free_slabs(void) |
3266 | { | |
8287f009 | 3267 | kmem_cache_destroy(odstate_slab); |
abf1135b CH |
3268 | kmem_cache_destroy(openowner_slab); |
3269 | kmem_cache_destroy(lockowner_slab); | |
3270 | kmem_cache_destroy(file_slab); | |
3271 | kmem_cache_destroy(stateid_slab); | |
3272 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3273 | } |
1da177e4 | 3274 | |
72083396 | 3275 | int |
e60d4398 N |
3276 | nfsd4_init_slabs(void) |
3277 | { | |
fe0750e5 BF |
3278 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3279 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3280 | if (openowner_slab == NULL) | |
abf1135b | 3281 | goto out; |
fe0750e5 | 3282 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3283 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3284 | if (lockowner_slab == NULL) |
abf1135b | 3285 | goto out_free_openowner_slab; |
e60d4398 | 3286 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3287 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3288 | if (file_slab == NULL) |
abf1135b | 3289 | goto out_free_lockowner_slab; |
5ac049ac | 3290 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3291 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3292 | if (stateid_slab == NULL) |
abf1135b | 3293 | goto out_free_file_slab; |
5b2d21c1 | 3294 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3295 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3296 | if (deleg_slab == NULL) |
abf1135b | 3297 | goto out_free_stateid_slab; |
8287f009 SB |
3298 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
3299 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
3300 | if (odstate_slab == NULL) | |
3301 | goto out_free_deleg_slab; | |
e60d4398 | 3302 | return 0; |
abf1135b | 3303 | |
8287f009 SB |
3304 | out_free_deleg_slab: |
3305 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
3306 | out_free_stateid_slab: |
3307 | kmem_cache_destroy(stateid_slab); | |
3308 | out_free_file_slab: | |
3309 | kmem_cache_destroy(file_slab); | |
3310 | out_free_lockowner_slab: | |
3311 | kmem_cache_destroy(lockowner_slab); | |
3312 | out_free_openowner_slab: | |
3313 | kmem_cache_destroy(openowner_slab); | |
3314 | out: | |
e60d4398 N |
3315 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3316 | return -ENOMEM; | |
1da177e4 LT |
3317 | } |
3318 | ||
ff194bd9 | 3319 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3320 | { |
ff194bd9 BF |
3321 | rp->rp_status = nfserr_serverfault; |
3322 | rp->rp_buflen = 0; | |
3323 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3324 | mutex_init(&rp->rp_mutex); |
3325 | } | |
3326 | ||
3327 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3328 | struct nfs4_stateowner *so) | |
3329 | { | |
3330 | if (!nfsd4_has_session(cstate)) { | |
3331 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 3332 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
3333 | } |
3334 | } | |
3335 | ||
3336 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3337 | { | |
3338 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3339 | ||
3340 | if (so != NULL) { | |
3341 | cstate->replay_owner = NULL; | |
3342 | mutex_unlock(&so->so_replay.rp_mutex); | |
3343 | nfs4_put_stateowner(so); | |
3344 | } | |
1da177e4 LT |
3345 | } |
3346 | ||
fe0750e5 | 3347 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3348 | { |
1da177e4 | 3349 | struct nfs4_stateowner *sop; |
1da177e4 | 3350 | |
fe0750e5 | 3351 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3352 | if (!sop) |
3353 | return NULL; | |
3354 | ||
3355 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3356 | if (!sop->so_owner.data) { | |
fe0750e5 | 3357 | kmem_cache_free(slab, sop); |
1da177e4 | 3358 | return NULL; |
ff194bd9 BF |
3359 | } |
3360 | sop->so_owner.len = owner->len; | |
3361 | ||
ea1da636 | 3362 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3363 | sop->so_client = clp; |
3364 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3365 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3366 | return sop; |
3367 | } | |
3368 | ||
fe0750e5 | 3369 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3370 | { |
d4f0489f | 3371 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3372 | |
d4f0489f TM |
3373 | list_add(&oo->oo_owner.so_strhash, |
3374 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3375 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3376 | } |
3377 | ||
8f4b54c5 JL |
3378 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3379 | { | |
d4f0489f | 3380 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3381 | } |
3382 | ||
6b180f0b JL |
3383 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3384 | { | |
3385 | struct nfs4_openowner *oo = openowner(so); | |
3386 | ||
3387 | kmem_cache_free(openowner_slab, oo); | |
3388 | } | |
3389 | ||
3390 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3391 | .so_unhash = nfs4_unhash_openowner, |
3392 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3393 | }; |
3394 | ||
7fc0564e AE |
3395 | static struct nfs4_ol_stateid * |
3396 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
3397 | { | |
3398 | struct nfs4_ol_stateid *local, *ret = NULL; | |
3399 | struct nfs4_openowner *oo = open->op_openowner; | |
3400 | ||
3401 | lockdep_assert_held(&fp->fi_lock); | |
3402 | ||
3403 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
3404 | /* ignore lock owners */ | |
3405 | if (local->st_stateowner->so_is_open_owner == 0) | |
3406 | continue; | |
3407 | if (local->st_stateowner == &oo->oo_owner) { | |
3408 | ret = local; | |
3409 | atomic_inc(&ret->st_stid.sc_count); | |
3410 | break; | |
3411 | } | |
3412 | } | |
3413 | return ret; | |
3414 | } | |
3415 | ||
fe0750e5 | 3416 | static struct nfs4_openowner * |
13d6f66b | 3417 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3418 | struct nfsd4_compound_state *cstate) |
3419 | { | |
13d6f66b | 3420 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3421 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3422 | |
fe0750e5 BF |
3423 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3424 | if (!oo) | |
ff194bd9 | 3425 | return NULL; |
6b180f0b | 3426 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3427 | oo->oo_owner.so_is_open_owner = 1; |
3428 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3429 | oo->oo_flags = 0; |
db24b3b4 JL |
3430 | if (nfsd4_has_session(cstate)) |
3431 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3432 | oo->oo_time = 0; |
38c387b5 | 3433 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3434 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3435 | spin_lock(&clp->cl_lock); |
3436 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3437 | if (ret == NULL) { |
3438 | hash_openowner(oo, clp, strhashval); | |
3439 | ret = oo; | |
3440 | } else | |
d50ffded KM |
3441 | nfs4_free_stateowner(&oo->oo_owner); |
3442 | ||
d4f0489f | 3443 | spin_unlock(&clp->cl_lock); |
c5952338 | 3444 | return ret; |
1da177e4 LT |
3445 | } |
3446 | ||
7fc0564e AE |
3447 | static struct nfs4_ol_stateid * |
3448 | init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, | |
3449 | struct nfsd4_open *open) | |
3450 | { | |
3451 | ||
fe0750e5 | 3452 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 3453 | struct nfs4_ol_stateid *retstp = NULL; |
1da177e4 | 3454 | |
7fc0564e AE |
3455 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3456 | spin_lock(&fp->fi_lock); | |
3457 | ||
3458 | retstp = nfsd4_find_existing_open(fp, open); | |
3459 | if (retstp) | |
3460 | goto out_unlock; | |
d6f2bc5d | 3461 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3462 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3463 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 3464 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 3465 | get_nfs4_file(fp); |
11b9164a | 3466 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3467 | stp->st_access_bmap = 0; |
3468 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3469 | stp->st_openstp = NULL; |
35a92fe8 | 3470 | init_rwsem(&stp->st_rwsem); |
1c755dc1 | 3471 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 3472 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
3473 | |
3474 | out_unlock: | |
1d31a253 | 3475 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 3476 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
7fc0564e | 3477 | return retstp; |
1da177e4 LT |
3478 | } |
3479 | ||
d3134b10 JL |
3480 | /* |
3481 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3482 | * CLOSE replay. We still do need to release any file access that is held by | |
3483 | * them before returning however. | |
3484 | */ | |
fd39ca9a | 3485 | static void |
d3134b10 | 3486 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3487 | { |
217526e7 | 3488 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3489 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3490 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3491 | nfsd_net_id); | |
73758fed | 3492 | |
fe0750e5 | 3493 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3494 | |
b401be22 JL |
3495 | /* |
3496 | * We know that we hold one reference via nfsd4_close, and another | |
3497 | * "persistent" reference for the client. If the refcount is higher | |
3498 | * than 2, then there are still calls in progress that are using this | |
3499 | * stateid. We can't put the sc_file reference until they are finished. | |
3500 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3501 | * there should be no danger of the refcount going back up again at | |
3502 | * this point. | |
3503 | */ | |
3504 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3505 | ||
d3134b10 JL |
3506 | release_all_access(s); |
3507 | if (s->st_stid.sc_file) { | |
3508 | put_nfs4_file(s->st_stid.sc_file); | |
3509 | s->st_stid.sc_file = NULL; | |
3510 | } | |
217526e7 JL |
3511 | |
3512 | spin_lock(&nn->client_lock); | |
3513 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3514 | oo->oo_last_closed_stid = s; |
73758fed | 3515 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3516 | oo->oo_time = get_seconds(); |
217526e7 JL |
3517 | spin_unlock(&nn->client_lock); |
3518 | if (last) | |
3519 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3520 | } |
3521 | ||
1da177e4 LT |
3522 | /* search file_hashtbl[] for file */ |
3523 | static struct nfs4_file * | |
5b095e99 | 3524 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 3525 | { |
1da177e4 LT |
3526 | struct nfs4_file *fp; |
3527 | ||
5b095e99 | 3528 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
4d94c2ef | 3529 | if (fh_match(&fp->fi_fhandle, fh)) { |
5b095e99 JL |
3530 | if (atomic_inc_not_zero(&fp->fi_ref)) |
3531 | return fp; | |
13cd2184 | 3532 | } |
1da177e4 LT |
3533 | } |
3534 | return NULL; | |
3535 | } | |
3536 | ||
e6ba76e1 | 3537 | struct nfs4_file * |
ca943217 | 3538 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3539 | { |
3540 | struct nfs4_file *fp; | |
5b095e99 | 3541 | unsigned int hashval = file_hashval(fh); |
950e0118 | 3542 | |
5b095e99 JL |
3543 | rcu_read_lock(); |
3544 | fp = find_file_locked(fh, hashval); | |
3545 | rcu_read_unlock(); | |
950e0118 TM |
3546 | return fp; |
3547 | } | |
3548 | ||
3549 | static struct nfs4_file * | |
f9c00c3a | 3550 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3551 | { |
3552 | struct nfs4_file *fp; | |
5b095e99 JL |
3553 | unsigned int hashval = file_hashval(fh); |
3554 | ||
3555 | rcu_read_lock(); | |
3556 | fp = find_file_locked(fh, hashval); | |
3557 | rcu_read_unlock(); | |
3558 | if (fp) | |
3559 | return fp; | |
950e0118 TM |
3560 | |
3561 | spin_lock(&state_lock); | |
5b095e99 JL |
3562 | fp = find_file_locked(fh, hashval); |
3563 | if (likely(fp == NULL)) { | |
3564 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
3565 | fp = new; |
3566 | } | |
3567 | spin_unlock(&state_lock); | |
3568 | ||
3569 | return fp; | |
3570 | } | |
3571 | ||
1da177e4 LT |
3572 | /* |
3573 | * Called to check deny when READ with all zero stateid or | |
3574 | * WRITE with all zero or all one stateid | |
3575 | */ | |
b37ad28b | 3576 | static __be32 |
1da177e4 LT |
3577 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3578 | { | |
1da177e4 | 3579 | struct nfs4_file *fp; |
baeb4ff0 | 3580 | __be32 ret = nfs_ok; |
1da177e4 | 3581 | |
ca943217 | 3582 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3583 | if (!fp) |
baeb4ff0 JL |
3584 | return ret; |
3585 | /* Check for conflicting share reservations */ | |
1d31a253 | 3586 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3587 | if (fp->fi_share_deny & deny_type) |
3588 | ret = nfserr_locked; | |
1d31a253 | 3589 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3590 | put_nfs4_file(fp); |
3591 | return ret; | |
1da177e4 LT |
3592 | } |
3593 | ||
0162ac2b | 3594 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 3595 | { |
0162ac2b | 3596 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
3597 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3598 | nfsd_net_id); | |
e8c69d17 | 3599 | |
11b9164a | 3600 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3601 | |
dff1399f | 3602 | /* |
f54fe962 JL |
3603 | * We can't do this in nfsd_break_deleg_cb because it is |
3604 | * already holding inode->i_lock. | |
3605 | * | |
dff1399f JL |
3606 | * If the dl_time != 0, then we know that it has already been |
3607 | * queued for a lease break. Don't queue it again. | |
3608 | */ | |
f54fe962 | 3609 | spin_lock(&state_lock); |
dff1399f | 3610 | if (dp->dl_time == 0) { |
dff1399f | 3611 | dp->dl_time = get_seconds(); |
02e1215f | 3612 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3613 | } |
02e1215f JL |
3614 | spin_unlock(&state_lock); |
3615 | } | |
1da177e4 | 3616 | |
0162ac2b CH |
3617 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
3618 | struct rpc_task *task) | |
3619 | { | |
3620 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3621 | ||
a457974f AE |
3622 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
3623 | return 1; | |
3624 | ||
0162ac2b CH |
3625 | switch (task->tk_status) { |
3626 | case 0: | |
3627 | return 1; | |
3628 | case -EBADHANDLE: | |
3629 | case -NFS4ERR_BAD_STATEID: | |
3630 | /* | |
3631 | * Race: client probably got cb_recall before open reply | |
3632 | * granting delegation. | |
3633 | */ | |
3634 | if (dp->dl_retries--) { | |
3635 | rpc_delay(task, 2 * HZ); | |
3636 | return 0; | |
3637 | } | |
3638 | /*FALLTHRU*/ | |
3639 | default: | |
3640 | return -1; | |
3641 | } | |
3642 | } | |
3643 | ||
3644 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
3645 | { | |
3646 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
3647 | ||
3648 | nfs4_put_stid(&dp->dl_stid); | |
3649 | } | |
3650 | ||
c4cb8974 | 3651 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
3652 | .prepare = nfsd4_cb_recall_prepare, |
3653 | .done = nfsd4_cb_recall_done, | |
3654 | .release = nfsd4_cb_recall_release, | |
3655 | }; | |
3656 | ||
02e1215f JL |
3657 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3658 | { | |
3659 | /* | |
3660 | * We're assuming the state code never drops its reference | |
3661 | * without first removing the lease. Since we're in this lease | |
3662 | * callback (and since the lease code is serialized by the kernel | |
3663 | * lock) we know the server hasn't removed the lease yet, we know | |
3664 | * it's safe to take a reference. | |
3665 | */ | |
72c0b0fb | 3666 | atomic_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 3667 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
3668 | } |
3669 | ||
1c8c601a | 3670 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
3671 | static bool |
3672 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 3673 | { |
4d01b7f5 | 3674 | bool ret = false; |
acfdf5c3 BF |
3675 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3676 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3677 | |
7fa10cd1 BF |
3678 | if (!fp) { |
3679 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
4d01b7f5 | 3680 | return ret; |
7fa10cd1 BF |
3681 | } |
3682 | if (fp->fi_had_conflict) { | |
3683 | WARN(1, "duplicate break on %p\n", fp); | |
4d01b7f5 | 3684 | return ret; |
7fa10cd1 | 3685 | } |
0272e1fd BF |
3686 | /* |
3687 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3688 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3689 | * in time: |
0272e1fd BF |
3690 | */ |
3691 | fl->fl_break_time = 0; | |
1da177e4 | 3692 | |
02e1215f | 3693 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3694 | fp->fi_had_conflict = true; |
3695 | /* | |
4d01b7f5 JL |
3696 | * If there are no delegations on the list, then return true |
3697 | * so that the lease code will go ahead and delete it. | |
417c6629 JL |
3698 | */ |
3699 | if (list_empty(&fp->fi_delegations)) | |
4d01b7f5 | 3700 | ret = true; |
417c6629 JL |
3701 | else |
3702 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3703 | nfsd_break_one_deleg(dp); | |
02e1215f | 3704 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 3705 | return ret; |
1da177e4 LT |
3706 | } |
3707 | ||
c45198ed | 3708 | static int |
7448cc37 JL |
3709 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
3710 | struct list_head *dispose) | |
1da177e4 LT |
3711 | { |
3712 | if (arg & F_UNLCK) | |
c45198ed | 3713 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
3714 | else |
3715 | return -EAGAIN; | |
3716 | } | |
3717 | ||
7b021967 | 3718 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3719 | .lm_break = nfsd_break_deleg_cb, |
3720 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3721 | }; |
3722 | ||
7a8711c9 BF |
3723 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3724 | { | |
3725 | if (nfsd4_has_session(cstate)) | |
3726 | return nfs_ok; | |
3727 | if (seqid == so->so_seqid - 1) | |
3728 | return nfserr_replay_me; | |
3729 | if (seqid == so->so_seqid) | |
3730 | return nfs_ok; | |
3731 | return nfserr_bad_seqid; | |
3732 | } | |
1da177e4 | 3733 | |
4b24ca7d JL |
3734 | static __be32 lookup_clientid(clientid_t *clid, |
3735 | struct nfsd4_compound_state *cstate, | |
3736 | struct nfsd_net *nn) | |
3737 | { | |
3738 | struct nfs4_client *found; | |
3739 | ||
3740 | if (cstate->clp) { | |
3741 | found = cstate->clp; | |
3742 | if (!same_clid(&found->cl_clientid, clid)) | |
3743 | return nfserr_stale_clientid; | |
3744 | return nfs_ok; | |
3745 | } | |
3746 | ||
3747 | if (STALE_CLIENTID(clid, nn)) | |
3748 | return nfserr_stale_clientid; | |
3749 | ||
3750 | /* | |
3751 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3752 | * cached already then we know this is for is for v4.0 and "sessions" | |
3753 | * will be false. | |
3754 | */ | |
3755 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3756 | spin_lock(&nn->client_lock); |
4b24ca7d | 3757 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3758 | if (!found) { |
3759 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3760 | return nfserr_expired; |
3e339f96 TM |
3761 | } |
3762 | atomic_inc(&found->cl_refcount); | |
3763 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3764 | |
3765 | /* Cache the nfs4_client in cstate! */ | |
3766 | cstate->clp = found; | |
4b24ca7d JL |
3767 | return nfs_ok; |
3768 | } | |
3769 | ||
b37ad28b | 3770 | __be32 |
6668958f | 3771 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3772 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3773 | { |
1da177e4 LT |
3774 | clientid_t *clientid = &open->op_clientid; |
3775 | struct nfs4_client *clp = NULL; | |
3776 | unsigned int strhashval; | |
fe0750e5 | 3777 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3778 | __be32 status; |
1da177e4 | 3779 | |
2c142baa | 3780 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3781 | return nfserr_stale_clientid; |
32513b40 BF |
3782 | /* |
3783 | * In case we need it later, after we've already created the | |
3784 | * file and don't want to risk a further failure: | |
3785 | */ | |
3786 | open->op_file = nfsd4_alloc_file(); | |
3787 | if (open->op_file == NULL) | |
3788 | return nfserr_jukebox; | |
1da177e4 | 3789 | |
2d91e895 TM |
3790 | status = lookup_clientid(clientid, cstate, nn); |
3791 | if (status) | |
3792 | return status; | |
3793 | clp = cstate->clp; | |
3794 | ||
d4f0489f TM |
3795 | strhashval = ownerstr_hashval(&open->op_owner); |
3796 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3797 | open->op_openowner = oo; |
3798 | if (!oo) { | |
bcf130f9 | 3799 | goto new_owner; |
1da177e4 | 3800 | } |
dad1c067 | 3801 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3802 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3803 | release_openowner(oo); |
3804 | open->op_openowner = NULL; | |
bcf130f9 | 3805 | goto new_owner; |
0f442aa2 | 3806 | } |
4cdc951b BF |
3807 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3808 | if (status) | |
3809 | return status; | |
4cdc951b | 3810 | goto alloc_stateid; |
bcf130f9 | 3811 | new_owner: |
13d6f66b | 3812 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3813 | if (oo == NULL) |
3814 | return nfserr_jukebox; | |
3815 | open->op_openowner = oo; | |
4cdc951b | 3816 | alloc_stateid: |
b49e084d | 3817 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3818 | if (!open->op_stp) |
3819 | return nfserr_jukebox; | |
8287f009 SB |
3820 | |
3821 | if (nfsd4_has_session(cstate) && | |
3822 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
3823 | open->op_odstate = alloc_clnt_odstate(clp); | |
3824 | if (!open->op_odstate) | |
3825 | return nfserr_jukebox; | |
3826 | } | |
3827 | ||
0f442aa2 | 3828 | return nfs_ok; |
1da177e4 LT |
3829 | } |
3830 | ||
b37ad28b | 3831 | static inline __be32 |
4a6e43e6 N |
3832 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3833 | { | |
3834 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3835 | return nfserr_openmode; | |
3836 | else | |
3837 | return nfs_ok; | |
3838 | } | |
3839 | ||
f459e453 | 3840 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3841 | { |
f459e453 | 3842 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3843 | } |
3844 | ||
38c2f4b1 | 3845 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3846 | { |
f459e453 | 3847 | struct nfs4_stid *ret; |
24a0111e | 3848 | |
38c2f4b1 | 3849 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3850 | if (!ret) |
3851 | return NULL; | |
3852 | return delegstateid(ret); | |
24a0111e BF |
3853 | } |
3854 | ||
8b289b2c BF |
3855 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3856 | { | |
3857 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3858 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3859 | } | |
3860 | ||
b37ad28b | 3861 | static __be32 |
41d22663 | 3862 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3863 | struct nfs4_delegation **dp) |
3864 | { | |
3865 | int flags; | |
b37ad28b | 3866 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3867 | struct nfs4_delegation *deleg; |
567d9829 | 3868 | |
dcd94cc2 TM |
3869 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3870 | if (deleg == NULL) | |
c44c5eeb | 3871 | goto out; |
24a0111e | 3872 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3873 | status = nfs4_check_delegmode(deleg, flags); |
3874 | if (status) { | |
3875 | nfs4_put_stid(&deleg->dl_stid); | |
3876 | goto out; | |
3877 | } | |
3878 | *dp = deleg; | |
c44c5eeb | 3879 | out: |
8b289b2c | 3880 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3881 | return nfs_ok; |
3882 | if (status) | |
3883 | return status; | |
dad1c067 | 3884 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3885 | return nfs_ok; |
567d9829 N |
3886 | } |
3887 | ||
21fb4016 BF |
3888 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3889 | { | |
3890 | int flags = 0; | |
3891 | ||
3892 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3893 | flags |= NFSD_MAY_READ; | |
3894 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3895 | flags |= NFSD_MAY_WRITE; | |
3896 | return flags; | |
3897 | } | |
3898 | ||
7e6a72e5 CH |
3899 | static inline __be32 |
3900 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3901 | struct nfsd4_open *open) | |
3902 | { | |
3903 | struct iattr iattr = { | |
3904 | .ia_valid = ATTR_SIZE, | |
3905 | .ia_size = 0, | |
3906 | }; | |
3907 | if (!open->op_truncate) | |
3908 | return 0; | |
3909 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3910 | return nfserr_inval; | |
3911 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3912 | } | |
3913 | ||
0c12eaff | 3914 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3915 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3916 | struct nfsd4_open *open) | |
f9d7562f | 3917 | { |
de18643d | 3918 | struct file *filp = NULL; |
f9d7562f | 3919 | __be32 status; |
0c12eaff CB |
3920 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3921 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3922 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3923 | |
de18643d | 3924 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3925 | |
3926 | /* | |
3927 | * Are we trying to set a deny mode that would conflict with | |
3928 | * current access? | |
3929 | */ | |
3930 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3931 | if (status != nfs_ok) { | |
3932 | spin_unlock(&fp->fi_lock); | |
3933 | goto out; | |
3934 | } | |
3935 | ||
3936 | /* set access to the file */ | |
3937 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3938 | if (status != nfs_ok) { | |
3939 | spin_unlock(&fp->fi_lock); | |
3940 | goto out; | |
3941 | } | |
3942 | ||
3943 | /* Set access bits in stateid */ | |
3944 | old_access_bmap = stp->st_access_bmap; | |
3945 | set_access(open->op_share_access, stp); | |
3946 | ||
3947 | /* Set new deny mask */ | |
3948 | old_deny_bmap = stp->st_deny_bmap; | |
3949 | set_deny(open->op_share_deny, stp); | |
3950 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3951 | ||
f9d7562f | 3952 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3953 | spin_unlock(&fp->fi_lock); |
3954 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3955 | if (status) |
baeb4ff0 | 3956 | goto out_put_access; |
de18643d TM |
3957 | spin_lock(&fp->fi_lock); |
3958 | if (!fp->fi_fds[oflag]) { | |
3959 | fp->fi_fds[oflag] = filp; | |
3960 | filp = NULL; | |
3961 | } | |
f9d7562f | 3962 | } |
de18643d TM |
3963 | spin_unlock(&fp->fi_lock); |
3964 | if (filp) | |
3965 | fput(filp); | |
f9d7562f | 3966 | |
7e6a72e5 CH |
3967 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3968 | if (status) | |
3969 | goto out_put_access; | |
7e6a72e5 CH |
3970 | out: |
3971 | return status; | |
baeb4ff0 JL |
3972 | out_put_access: |
3973 | stp->st_access_bmap = old_access_bmap; | |
3974 | nfs4_file_put_access(fp, open->op_share_access); | |
3975 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3976 | goto out; | |
1da177e4 LT |
3977 | } |
3978 | ||
b37ad28b | 3979 | static __be32 |
dcef0413 | 3980 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 3981 | { |
b37ad28b | 3982 | __be32 status; |
6ac75368 | 3983 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 3984 | |
6eb3a1d0 | 3985 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3986 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3987 | |
baeb4ff0 JL |
3988 | /* test and set deny mode */ |
3989 | spin_lock(&fp->fi_lock); | |
3990 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3991 | if (status == nfs_ok) { | |
baeb4ff0 JL |
3992 | set_deny(open->op_share_deny, stp); |
3993 | fp->fi_share_deny |= | |
3994 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3995 | } | |
3996 | spin_unlock(&fp->fi_lock); | |
3997 | ||
3998 | if (status != nfs_ok) | |
1da177e4 | 3999 | return status; |
1da177e4 | 4000 | |
baeb4ff0 JL |
4001 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4002 | if (status != nfs_ok) | |
4003 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4004 | return status; | |
4005 | } | |
1da177e4 | 4006 | |
14a24e99 BF |
4007 | /* Should we give out recallable state?: */ |
4008 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4009 | { | |
4010 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4011 | return true; | |
4012 | /* | |
4013 | * In the sessions case, since we don't have to establish a | |
4014 | * separate connection for callbacks, we assume it's OK | |
4015 | * until we hear otherwise: | |
4016 | */ | |
4017 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4018 | } | |
4019 | ||
d564fbec | 4020 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
4021 | { |
4022 | struct file_lock *fl; | |
4023 | ||
4024 | fl = locks_alloc_lock(); | |
4025 | if (!fl) | |
4026 | return NULL; | |
22d38c4c | 4027 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4028 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4029 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4030 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 4031 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 4032 | fl->fl_pid = current->tgid; |
22d38c4c BF |
4033 | return fl; |
4034 | } | |
4035 | ||
34ed9872 AE |
4036 | /** |
4037 | * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer | |
4038 | * @dp: a pointer to the nfs4_delegation we're adding. | |
4039 | * | |
4040 | * Return: | |
4041 | * On success: Return code will be 0 on success. | |
4042 | * | |
4043 | * On error: -EAGAIN if there was an existing delegation. | |
4044 | * nonzero if there is an error in other cases. | |
4045 | * | |
4046 | */ | |
4047 | ||
99c41515 | 4048 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 4049 | { |
11b9164a | 4050 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
efde6b4d | 4051 | struct file_lock *fl; |
417c6629 JL |
4052 | struct file *filp; |
4053 | int status = 0; | |
edab9782 | 4054 | |
d564fbec | 4055 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
4056 | if (!fl) |
4057 | return -ENOMEM; | |
417c6629 JL |
4058 | filp = find_readable_file(fp); |
4059 | if (!filp) { | |
4060 | /* We should always have a readable file here */ | |
4061 | WARN_ON_ONCE(1); | |
af9dbaf4 | 4062 | locks_free_lock(fl); |
417c6629 JL |
4063 | return -EBADF; |
4064 | } | |
4065 | fl->fl_file = filp; | |
e6f5c789 | 4066 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
1c7dd2ff | 4067 | if (fl) |
417c6629 | 4068 | locks_free_lock(fl); |
1c7dd2ff | 4069 | if (status) |
417c6629 | 4070 | goto out_fput; |
417c6629 JL |
4071 | spin_lock(&state_lock); |
4072 | spin_lock(&fp->fi_lock); | |
4073 | /* Did the lease get broken before we took the lock? */ | |
4074 | status = -EAGAIN; | |
4075 | if (fp->fi_had_conflict) | |
4076 | goto out_unlock; | |
4077 | /* Race breaker */ | |
0c637be8 | 4078 | if (fp->fi_deleg_file) { |
34ed9872 | 4079 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4080 | goto out_unlock; |
4081 | } | |
417c6629 | 4082 | fp->fi_deleg_file = filp; |
34ed9872 AE |
4083 | fp->fi_delegees = 0; |
4084 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4085 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4086 | spin_unlock(&state_lock); |
34ed9872 AE |
4087 | if (status) { |
4088 | /* Should never happen, this is a new fi_deleg_file */ | |
4089 | WARN_ON_ONCE(1); | |
4090 | goto out_fput; | |
4091 | } | |
acfdf5c3 | 4092 | return 0; |
417c6629 JL |
4093 | out_unlock: |
4094 | spin_unlock(&fp->fi_lock); | |
4095 | spin_unlock(&state_lock); | |
4096 | out_fput: | |
4097 | fput(filp); | |
e873088f | 4098 | return status; |
acfdf5c3 BF |
4099 | } |
4100 | ||
0b26693c JL |
4101 | static struct nfs4_delegation * |
4102 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4103 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4104 | { |
0b26693c JL |
4105 | int status; |
4106 | struct nfs4_delegation *dp; | |
417c6629 | 4107 | |
bf7bd3e9 | 4108 | if (fp->fi_had_conflict) |
0b26693c JL |
4109 | return ERR_PTR(-EAGAIN); |
4110 | ||
34ed9872 AE |
4111 | spin_lock(&state_lock); |
4112 | spin_lock(&fp->fi_lock); | |
4113 | status = nfs4_get_existing_delegation(clp, fp); | |
4114 | spin_unlock(&fp->fi_lock); | |
4115 | spin_unlock(&state_lock); | |
4116 | ||
4117 | if (status) | |
4118 | return ERR_PTR(status); | |
4119 | ||
8287f009 | 4120 | dp = alloc_init_deleg(clp, fh, odstate); |
0b26693c JL |
4121 | if (!dp) |
4122 | return ERR_PTR(-ENOMEM); | |
4123 | ||
bf7bd3e9 | 4124 | get_nfs4_file(fp); |
417c6629 JL |
4125 | spin_lock(&state_lock); |
4126 | spin_lock(&fp->fi_lock); | |
11b9164a | 4127 | dp->dl_stid.sc_file = fp; |
0c637be8 | 4128 | if (!fp->fi_deleg_file) { |
417c6629 JL |
4129 | spin_unlock(&fp->fi_lock); |
4130 | spin_unlock(&state_lock); | |
0b26693c JL |
4131 | status = nfs4_setlease(dp); |
4132 | goto out; | |
417c6629 | 4133 | } |
acfdf5c3 | 4134 | if (fp->fi_had_conflict) { |
417c6629 JL |
4135 | status = -EAGAIN; |
4136 | goto out_unlock; | |
acfdf5c3 | 4137 | } |
34ed9872 | 4138 | status = hash_delegation_locked(dp, fp); |
417c6629 JL |
4139 | out_unlock: |
4140 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 4141 | spin_unlock(&state_lock); |
0b26693c JL |
4142 | out: |
4143 | if (status) { | |
8287f009 | 4144 | put_clnt_odstate(dp->dl_clnt_odstate); |
6011695d | 4145 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
4146 | return ERR_PTR(status); |
4147 | } | |
4148 | return dp; | |
edab9782 BF |
4149 | } |
4150 | ||
4aa8913c BH |
4151 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4152 | { | |
4153 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4154 | if (status == -EAGAIN) | |
4155 | open->op_why_no_deleg = WND4_CONTENTION; | |
4156 | else { | |
4157 | open->op_why_no_deleg = WND4_RESOURCE; | |
4158 | switch (open->op_deleg_want) { | |
4159 | case NFS4_SHARE_WANT_READ_DELEG: | |
4160 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4161 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4162 | break; | |
4163 | case NFS4_SHARE_WANT_CANCEL: | |
4164 | open->op_why_no_deleg = WND4_CANCELLED; | |
4165 | break; | |
4166 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4167 | WARN_ON_ONCE(1); |
4aa8913c BH |
4168 | } |
4169 | } | |
4170 | } | |
4171 | ||
1da177e4 LT |
4172 | /* |
4173 | * Attempt to hand out a delegation. | |
99c41515 BF |
4174 | * |
4175 | * Note we don't support write delegations, and won't until the vfs has | |
4176 | * proper support for them. | |
1da177e4 LT |
4177 | */ |
4178 | static void | |
4cf59221 JL |
4179 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4180 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4181 | { |
4182 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4183 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4184 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4185 | int cb_up; |
99c41515 | 4186 | int status = 0; |
1da177e4 | 4187 | |
fe0750e5 | 4188 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4189 | open->op_recall = 0; |
4190 | switch (open->op_claim_type) { | |
4191 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4192 | if (!cb_up) |
7b190fec | 4193 | open->op_recall = 1; |
99c41515 BF |
4194 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4195 | goto out_no_deleg; | |
7b190fec N |
4196 | break; |
4197 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4198 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4199 | /* |
4200 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4201 | * had the chance to reclaim theirs, *and* until |
4202 | * NLM locks have all been reclaimed: | |
99c41515 | 4203 | */ |
4cf59221 | 4204 | if (locks_in_grace(clp->net)) |
99c41515 | 4205 | goto out_no_deleg; |
dad1c067 | 4206 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4207 | goto out_no_deleg; |
9a0590ae SD |
4208 | /* |
4209 | * Also, if the file was opened for write or | |
4210 | * create, there's a good chance the client's | |
4211 | * about to write to it, resulting in an | |
4212 | * immediate recall (since we don't support | |
4213 | * write delegations): | |
4214 | */ | |
7b190fec | 4215 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
4216 | goto out_no_deleg; |
4217 | if (open->op_create == NFS4_OPEN_CREATE) | |
4218 | goto out_no_deleg; | |
7b190fec N |
4219 | break; |
4220 | default: | |
99c41515 | 4221 | goto out_no_deleg; |
7b190fec | 4222 | } |
8287f009 | 4223 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 4224 | if (IS_ERR(dp)) |
dd239cc0 | 4225 | goto out_no_deleg; |
1da177e4 | 4226 | |
d5477a8d | 4227 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 4228 | |
8c10cbdb | 4229 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 4230 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 4231 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 4232 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 4233 | return; |
dd239cc0 | 4234 | out_no_deleg: |
99c41515 BF |
4235 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
4236 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 4237 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 4238 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
4239 | open->op_recall = 1; |
4240 | } | |
99c41515 BF |
4241 | |
4242 | /* 4.1 client asking for a delegation? */ | |
4243 | if (open->op_deleg_want) | |
4244 | nfsd4_open_deleg_none_ext(open, status); | |
4245 | return; | |
1da177e4 LT |
4246 | } |
4247 | ||
e27f49c3 BH |
4248 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
4249 | struct nfs4_delegation *dp) | |
4250 | { | |
4251 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
4252 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4253 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4254 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4255 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4256 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4257 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4258 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4259 | } | |
4260 | /* Otherwise the client must be confused wanting a delegation | |
4261 | * it already has, therefore we don't return | |
4262 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4263 | */ | |
4264 | } | |
4265 | ||
b37ad28b | 4266 | __be32 |
1da177e4 LT |
4267 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4268 | { | |
6668958f | 4269 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4270 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4271 | struct nfs4_file *fp = NULL; |
dcef0413 | 4272 | struct nfs4_ol_stateid *stp = NULL; |
7fc0564e | 4273 | struct nfs4_ol_stateid *swapstp = NULL; |
567d9829 | 4274 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4275 | __be32 status; |
1da177e4 | 4276 | |
1da177e4 LT |
4277 | /* |
4278 | * Lookup file; if found, lookup stateid and check open request, | |
4279 | * and check for delegations in the process of being recalled. | |
4280 | * If not found, create the nfs4_file struct | |
4281 | */ | |
f9c00c3a | 4282 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4283 | if (fp != open->op_file) { |
41d22663 | 4284 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4285 | if (status) |
4286 | goto out; | |
7fc0564e | 4287 | spin_lock(&fp->fi_lock); |
a46cb7f2 | 4288 | stp = nfsd4_find_existing_open(fp, open); |
7fc0564e | 4289 | spin_unlock(&fp->fi_lock); |
1da177e4 | 4290 | } else { |
950e0118 | 4291 | open->op_file = NULL; |
c44c5eeb | 4292 | status = nfserr_bad_stateid; |
8b289b2c | 4293 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4294 | goto out; |
1da177e4 LT |
4295 | } |
4296 | ||
4297 | /* | |
4298 | * OPEN the file, or upgrade an existing OPEN. | |
4299 | * If truncate fails, the OPEN fails. | |
4300 | */ | |
4301 | if (stp) { | |
4302 | /* Stateid was found, this is an OPEN upgrade */ | |
35a92fe8 | 4303 | down_read(&stp->st_rwsem); |
f9d7562f | 4304 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 JL |
4305 | if (status) { |
4306 | up_read(&stp->st_rwsem); | |
1da177e4 | 4307 | goto out; |
35a92fe8 | 4308 | } |
1da177e4 | 4309 | } else { |
4cdc951b BF |
4310 | stp = open->op_stp; |
4311 | open->op_stp = NULL; | |
7fc0564e AE |
4312 | swapstp = init_open_stateid(stp, fp, open); |
4313 | if (swapstp) { | |
4314 | nfs4_put_stid(&stp->st_stid); | |
4315 | stp = swapstp; | |
4316 | down_read(&stp->st_rwsem); | |
4317 | status = nfs4_upgrade_open(rqstp, fp, current_fh, | |
4318 | stp, open); | |
4319 | if (status) { | |
4320 | up_read(&stp->st_rwsem); | |
4321 | goto out; | |
4322 | } | |
4323 | goto upgrade_out; | |
4324 | } | |
35a92fe8 | 4325 | down_read(&stp->st_rwsem); |
6eb3a1d0 JL |
4326 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4327 | if (status) { | |
35a92fe8 | 4328 | up_read(&stp->st_rwsem); |
6eb3a1d0 JL |
4329 | release_open_stateid(stp); |
4330 | goto out; | |
4331 | } | |
8287f009 SB |
4332 | |
4333 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
4334 | open->op_odstate); | |
4335 | if (stp->st_clnt_odstate == open->op_odstate) | |
4336 | open->op_odstate = NULL; | |
1da177e4 | 4337 | } |
7fc0564e | 4338 | upgrade_out: |
9767feb2 | 4339 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
35a92fe8 | 4340 | up_read(&stp->st_rwsem); |
1da177e4 | 4341 | |
d24433cd | 4342 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4343 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4344 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4345 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4346 | goto nodeleg; | |
4347 | } | |
4348 | } | |
4349 | ||
1da177e4 LT |
4350 | /* |
4351 | * Attempt to hand out a delegation. No error return, because the | |
4352 | * OPEN succeeds even if we fail. | |
4353 | */ | |
4cf59221 | 4354 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4355 | nodeleg: |
1da177e4 LT |
4356 | status = nfs_ok; |
4357 | ||
8c10cbdb | 4358 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4359 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4360 | out: |
d24433cd BH |
4361 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4362 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4363 | open->op_deleg_want) |
4364 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4365 | |
13cd2184 N |
4366 | if (fp) |
4367 | put_nfs4_file(fp); | |
37515177 | 4368 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 4369 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
4370 | /* |
4371 | * To finish the open response, we just need to set the rflags. | |
4372 | */ | |
4373 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4374 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4375 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4376 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4377 | if (dp) |
4378 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4379 | if (stp) |
4380 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4381 | |
4382 | return status; | |
4383 | } | |
4384 | ||
58fb12e6 | 4385 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 4386 | struct nfsd4_open *open) |
d29b20cd BF |
4387 | { |
4388 | if (open->op_openowner) { | |
d3134b10 JL |
4389 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4390 | ||
4391 | nfsd4_cstate_assign_replay(cstate, so); | |
4392 | nfs4_put_stateowner(so); | |
d29b20cd | 4393 | } |
32513b40 | 4394 | if (open->op_file) |
5b095e99 | 4395 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 4396 | if (open->op_stp) |
6011695d | 4397 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
4398 | if (open->op_odstate) |
4399 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
4400 | } |
4401 | ||
b37ad28b | 4402 | __be32 |
b591480b BF |
4403 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4404 | clientid_t *clid) | |
1da177e4 LT |
4405 | { |
4406 | struct nfs4_client *clp; | |
b37ad28b | 4407 | __be32 status; |
7f2210fa | 4408 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4409 | |
1da177e4 LT |
4410 | dprintk("process_renew(%08x/%08x): starting\n", |
4411 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4412 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4413 | if (status) |
1da177e4 | 4414 | goto out; |
4b24ca7d | 4415 | clp = cstate->clp; |
1da177e4 | 4416 | status = nfserr_cb_path_down; |
ea1da636 | 4417 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4418 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4419 | goto out; |
4420 | status = nfs_ok; | |
4421 | out: | |
1da177e4 LT |
4422 | return status; |
4423 | } | |
4424 | ||
7f5ef2e9 | 4425 | void |
12760c66 | 4426 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4427 | { |
33dcc481 | 4428 | /* do nothing if grace period already ended */ |
a51c84ed | 4429 | if (nn->grace_ended) |
33dcc481 JL |
4430 | return; |
4431 | ||
a76b4319 | 4432 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4433 | nn->grace_ended = true; |
70b28235 BF |
4434 | /* |
4435 | * If the server goes down again right now, an NFSv4 | |
4436 | * client will still be allowed to reclaim after it comes back up, | |
4437 | * even if it hasn't yet had a chance to reclaim state this time. | |
4438 | * | |
4439 | */ | |
919b8049 | 4440 | nfsd4_record_grace_done(nn); |
70b28235 BF |
4441 | /* |
4442 | * At this point, NFSv4 clients can still reclaim. But if the | |
4443 | * server crashes, any that have not yet reclaimed will be out | |
4444 | * of luck on the next boot. | |
4445 | * | |
4446 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
4447 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
4448 | * have reclaimed after their first OPEN.) | |
4449 | */ | |
5e1533c7 | 4450 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
4451 | /* |
4452 | * At this point, and once lockd and/or any other containers | |
4453 | * exit their grace period, further reclaims will fail and | |
4454 | * regular locking can resume. | |
4455 | */ | |
a76b4319 N |
4456 | } |
4457 | ||
fd39ca9a | 4458 | static time_t |
09121281 | 4459 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4460 | { |
4461 | struct nfs4_client *clp; | |
fe0750e5 | 4462 | struct nfs4_openowner *oo; |
1da177e4 | 4463 | struct nfs4_delegation *dp; |
217526e7 | 4464 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4465 | struct list_head *pos, *next, reaplist; |
3d733711 | 4466 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4467 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4468 | |
1da177e4 | 4469 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4470 | nfsd4_end_grace(nn); |
36acb66b | 4471 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4472 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4473 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4474 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4475 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4476 | t = clp->cl_time - cutoff; | |
a832e7ae | 4477 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4478 | break; |
4479 | } | |
221a6876 | 4480 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4481 | dprintk("NFSD: client in use (clientid %08x)\n", |
4482 | clp->cl_clientid.cl_id); | |
4483 | continue; | |
4484 | } | |
4864af97 | 4485 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4486 | } |
c9a49628 | 4487 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4488 | list_for_each_safe(pos, next, &reaplist) { |
4489 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4490 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4491 | clp->cl_clientid.cl_id); | |
4864af97 | 4492 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4493 | expire_client(clp); |
4494 | } | |
cdc97505 | 4495 | spin_lock(&state_lock); |
e8c69d17 | 4496 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
4497 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4498 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4499 | t = dp->dl_time - cutoff; |
4500 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4501 | break; |
4502 | } | |
3fcbbd24 | 4503 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 4504 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 4505 | } |
cdc97505 | 4506 | spin_unlock(&state_lock); |
2d4a532d JL |
4507 | while (!list_empty(&reaplist)) { |
4508 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4509 | dl_recall_lru); | |
4510 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4511 | revoke_delegation(dp); |
1da177e4 | 4512 | } |
217526e7 JL |
4513 | |
4514 | spin_lock(&nn->client_lock); | |
4515 | while (!list_empty(&nn->close_lru)) { | |
4516 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4517 | oo_close_lru); | |
4518 | if (time_after((unsigned long)oo->oo_time, | |
4519 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4520 | t = oo->oo_time - cutoff; |
4521 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4522 | break; |
4523 | } | |
217526e7 JL |
4524 | list_del_init(&oo->oo_close_lru); |
4525 | stp = oo->oo_last_closed_stid; | |
4526 | oo->oo_last_closed_stid = NULL; | |
4527 | spin_unlock(&nn->client_lock); | |
4528 | nfs4_put_stid(&stp->st_stid); | |
4529 | spin_lock(&nn->client_lock); | |
1da177e4 | 4530 | } |
217526e7 JL |
4531 | spin_unlock(&nn->client_lock); |
4532 | ||
a832e7ae | 4533 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4534 | return new_timeo; |
1da177e4 LT |
4535 | } |
4536 | ||
a254b246 HH |
4537 | static struct workqueue_struct *laundry_wq; |
4538 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4539 | |
4540 | static void | |
09121281 | 4541 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4542 | { |
4543 | time_t t; | |
09121281 SK |
4544 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4545 | work); | |
4546 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4547 | laundromat_work); | |
1da177e4 | 4548 | |
09121281 | 4549 | t = nfs4_laundromat(nn); |
1da177e4 | 4550 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4551 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4552 | } |
4553 | ||
8fcd461d | 4554 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 4555 | { |
8fcd461d | 4556 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
4557 | return nfserr_bad_stateid; |
4558 | return nfs_ok; | |
1da177e4 LT |
4559 | } |
4560 | ||
1da177e4 | 4561 | static inline int |
82c5ff1b | 4562 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4563 | { |
82c5ff1b JL |
4564 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4565 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4566 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4567 | } |
4568 | ||
4569 | static inline int | |
82c5ff1b | 4570 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4571 | { |
82c5ff1b JL |
4572 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4573 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4574 | } |
4575 | ||
4576 | static | |
dcef0413 | 4577 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4578 | { |
b37ad28b | 4579 | __be32 status = nfserr_openmode; |
1da177e4 | 4580 | |
02921914 BF |
4581 | /* For lock stateid's, we test the parent open, not the lock: */ |
4582 | if (stp->st_openstp) | |
4583 | stp = stp->st_openstp; | |
82c5ff1b | 4584 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4585 | goto out; |
82c5ff1b | 4586 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4587 | goto out; |
4588 | status = nfs_ok; | |
4589 | out: | |
4590 | return status; | |
4591 | } | |
4592 | ||
b37ad28b | 4593 | static inline __be32 |
5ccb0066 | 4594 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4595 | { |
203a8c8e | 4596 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4597 | return nfs_ok; |
c87fb4a3 | 4598 | else if (opens_in_grace(net)) { |
25985edc | 4599 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4600 | * conflicting state; so we must wait out the grace period. */ |
4601 | return nfserr_grace; | |
4602 | } else if (flags & WR_STATE) | |
4603 | return nfs4_share_conflict(current_fh, | |
4604 | NFS4_SHARE_DENY_WRITE); | |
4605 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4606 | return nfs4_share_conflict(current_fh, | |
4607 | NFS4_SHARE_DENY_READ); | |
4608 | } | |
4609 | ||
4610 | /* | |
4611 | * Allow READ/WRITE during grace period on recovered state only for files | |
4612 | * that are not able to provide mandatory locking. | |
4613 | */ | |
4614 | static inline int | |
5ccb0066 | 4615 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4616 | { |
c87fb4a3 | 4617 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4618 | } |
4619 | ||
81b82965 BF |
4620 | /* Returns true iff a is later than b: */ |
4621 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4622 | { | |
1a9357f4 | 4623 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4624 | } |
4625 | ||
57b7b43b | 4626 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4627 | { |
6668958f AA |
4628 | /* |
4629 | * When sessions are used the stateid generation number is ignored | |
4630 | * when it is zero. | |
4631 | */ | |
28dde241 | 4632 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4633 | return nfs_ok; |
4634 | ||
4635 | if (in->si_generation == ref->si_generation) | |
4636 | return nfs_ok; | |
6668958f | 4637 | |
0836f587 | 4638 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4639 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4640 | return nfserr_bad_stateid; |
4641 | /* | |
81b82965 BF |
4642 | * However, we could see a stateid from the past, even from a |
4643 | * non-buggy client. For example, if the client sends a lock | |
4644 | * while some IO is outstanding, the lock may bump si_generation | |
4645 | * while the IO is still in flight. The client could avoid that | |
4646 | * situation by waiting for responses on all the IO requests, | |
4647 | * but better performance may result in retrying IO that | |
4648 | * receives an old_stateid error if requests are rarely | |
4649 | * reordered in flight: | |
0836f587 | 4650 | */ |
81b82965 | 4651 | return nfserr_old_stateid; |
0836f587 BF |
4652 | } |
4653 | ||
ebe9cb3b CH |
4654 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
4655 | { | |
4656 | if (ols->st_stateowner->so_is_open_owner && | |
4657 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
4658 | return nfserr_bad_stateid; | |
4659 | return nfs_ok; | |
4660 | } | |
4661 | ||
7df302f7 | 4662 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4663 | { |
97b7e3b6 | 4664 | struct nfs4_stid *s; |
1af71cc8 | 4665 | __be32 status = nfserr_bad_stateid; |
17456804 | 4666 | |
7df302f7 | 4667 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4668 | return status; |
7df302f7 CL |
4669 | /* Client debugging aid. */ |
4670 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4671 | char addr_str[INET6_ADDRSTRLEN]; | |
4672 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4673 | sizeof(addr_str)); | |
4674 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4675 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4676 | return status; |
7df302f7 | 4677 | } |
1af71cc8 JL |
4678 | spin_lock(&cl->cl_lock); |
4679 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4680 | if (!s) |
1af71cc8 | 4681 | goto out_unlock; |
36279ac1 | 4682 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4683 | if (status) |
1af71cc8 | 4684 | goto out_unlock; |
23340032 BF |
4685 | switch (s->sc_type) { |
4686 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4687 | status = nfs_ok; |
4688 | break; | |
3bd64a5b | 4689 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4690 | status = nfserr_deleg_revoked; |
4691 | break; | |
23340032 BF |
4692 | case NFS4_OPEN_STID: |
4693 | case NFS4_LOCK_STID: | |
ebe9cb3b | 4694 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 4695 | break; |
23340032 BF |
4696 | default: |
4697 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4698 | /* Fallthrough */ |
23340032 | 4699 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4700 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4701 | status = nfserr_bad_stateid; |
23340032 | 4702 | } |
1af71cc8 JL |
4703 | out_unlock: |
4704 | spin_unlock(&cl->cl_lock); | |
4705 | return status; | |
17456804 BS |
4706 | } |
4707 | ||
cd61c522 | 4708 | __be32 |
2dd6e458 TM |
4709 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
4710 | stateid_t *stateid, unsigned char typemask, | |
4711 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4712 | { |
0eb6f20a | 4713 | __be32 status; |
38c2f4b1 BF |
4714 | |
4715 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4716 | return nfserr_bad_stateid; | |
4b24ca7d | 4717 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4718 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4719 | if (cstate->session) |
a8a7c677 | 4720 | return nfserr_bad_stateid; |
38c2f4b1 | 4721 | return nfserr_stale_stateid; |
a8a7c677 | 4722 | } |
0eb6f20a BF |
4723 | if (status) |
4724 | return status; | |
4b24ca7d | 4725 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4726 | if (!*s) |
4727 | return nfserr_bad_stateid; | |
4728 | return nfs_ok; | |
38c2f4b1 BF |
4729 | } |
4730 | ||
a0649b2d CH |
4731 | static struct file * |
4732 | nfs4_find_file(struct nfs4_stid *s, int flags) | |
4733 | { | |
af90f707 CH |
4734 | if (!s) |
4735 | return NULL; | |
4736 | ||
a0649b2d CH |
4737 | switch (s->sc_type) { |
4738 | case NFS4_DELEG_STID: | |
4739 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
4740 | return NULL; | |
4741 | return get_file(s->sc_file->fi_deleg_file); | |
4742 | case NFS4_OPEN_STID: | |
4743 | case NFS4_LOCK_STID: | |
4744 | if (flags & RD_STATE) | |
4745 | return find_readable_file(s->sc_file); | |
4746 | else | |
4747 | return find_writeable_file(s->sc_file); | |
4748 | break; | |
4749 | } | |
4750 | ||
4751 | return NULL; | |
4752 | } | |
4753 | ||
4754 | static __be32 | |
4755 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) | |
4756 | { | |
4757 | __be32 status; | |
4758 | ||
a0649b2d CH |
4759 | status = nfsd4_check_openowner_confirmed(ols); |
4760 | if (status) | |
4761 | return status; | |
4762 | return nfs4_check_openmode(ols, flags); | |
4763 | } | |
4764 | ||
af90f707 CH |
4765 | static __be32 |
4766 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
4767 | struct file **filpp, bool *tmp_file, int flags) | |
4768 | { | |
4769 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
4770 | struct file *file; | |
4771 | __be32 status; | |
4772 | ||
4773 | file = nfs4_find_file(s, flags); | |
4774 | if (file) { | |
4775 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, | |
4776 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
4777 | if (status) { | |
4778 | fput(file); | |
4779 | return status; | |
4780 | } | |
4781 | ||
4782 | *filpp = file; | |
4783 | } else { | |
4784 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); | |
4785 | if (status) | |
4786 | return status; | |
4787 | ||
4788 | if (tmp_file) | |
4789 | *tmp_file = true; | |
4790 | } | |
4791 | ||
4792 | return 0; | |
4793 | } | |
4794 | ||
1da177e4 | 4795 | /* |
a0649b2d CH |
4796 | * Checks for stateid operations |
4797 | */ | |
b37ad28b | 4798 | __be32 |
af90f707 CH |
4799 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
4800 | struct nfsd4_compound_state *cstate, stateid_t *stateid, | |
4801 | int flags, struct file **filpp, bool *tmp_file) | |
1da177e4 | 4802 | { |
a0649b2d CH |
4803 | struct svc_fh *fhp = &cstate->current_fh; |
4804 | struct inode *ino = d_inode(fhp->fh_dentry); | |
af90f707 | 4805 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 4806 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 4807 | struct nfs4_stid *s = NULL; |
b37ad28b | 4808 | __be32 status; |
1da177e4 | 4809 | |
1da177e4 LT |
4810 | if (filpp) |
4811 | *filpp = NULL; | |
af90f707 CH |
4812 | if (tmp_file) |
4813 | *tmp_file = false; | |
1da177e4 | 4814 | |
5ccb0066 | 4815 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4816 | return nfserr_grace; |
4817 | ||
af90f707 CH |
4818 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
4819 | status = check_special_stateids(net, fhp, stateid, flags); | |
4820 | goto done; | |
4821 | } | |
1da177e4 | 4822 | |
2dd6e458 | 4823 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4824 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4825 | &s, nn); |
38c2f4b1 | 4826 | if (status) |
c2d1d6a8 | 4827 | return status; |
a0649b2d CH |
4828 | status = check_stateid_generation(stateid, &s->sc_stateid, |
4829 | nfsd4_has_session(cstate)); | |
69064a27 BF |
4830 | if (status) |
4831 | goto out; | |
a0649b2d | 4832 | |
f7a4d872 BF |
4833 | switch (s->sc_type) { |
4834 | case NFS4_DELEG_STID: | |
a0649b2d | 4835 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
4836 | break; |
4837 | case NFS4_OPEN_STID: | |
4838 | case NFS4_LOCK_STID: | |
a0649b2d | 4839 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
f7a4d872 BF |
4840 | break; |
4841 | default: | |
14bcab1a | 4842 | status = nfserr_bad_stateid; |
a0649b2d CH |
4843 | break; |
4844 | } | |
8fcd461d JL |
4845 | if (status) |
4846 | goto out; | |
4847 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 4848 | |
af90f707 CH |
4849 | done: |
4850 | if (!status && filpp) | |
4851 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); | |
1da177e4 | 4852 | out: |
af90f707 CH |
4853 | if (s) |
4854 | nfs4_put_stid(s); | |
1da177e4 LT |
4855 | return status; |
4856 | } | |
4857 | ||
17456804 BS |
4858 | /* |
4859 | * Test if the stateid is valid | |
4860 | */ | |
4861 | __be32 | |
4862 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4863 | struct nfsd4_test_stateid *test_stateid) | |
4864 | { | |
03cfb420 BS |
4865 | struct nfsd4_test_stateid_id *stateid; |
4866 | struct nfs4_client *cl = cstate->session->se_client; | |
4867 | ||
03cfb420 | 4868 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
4869 | stateid->ts_id_status = |
4870 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 4871 | |
17456804 BS |
4872 | return nfs_ok; |
4873 | } | |
4874 | ||
e1ca12df BS |
4875 | __be32 |
4876 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4877 | struct nfsd4_free_stateid *free_stateid) | |
4878 | { | |
4879 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4880 | struct nfs4_stid *s; |
3bd64a5b | 4881 | struct nfs4_delegation *dp; |
fc5a96c3 | 4882 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4883 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4884 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 4885 | |
1af71cc8 JL |
4886 | spin_lock(&cl->cl_lock); |
4887 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4888 | if (!s) |
1af71cc8 | 4889 | goto out_unlock; |
2da1cec7 BF |
4890 | switch (s->sc_type) { |
4891 | case NFS4_DELEG_STID: | |
e1ca12df | 4892 | ret = nfserr_locks_held; |
1af71cc8 | 4893 | break; |
2da1cec7 | 4894 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4895 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4896 | if (ret) | |
1af71cc8 JL |
4897 | break; |
4898 | ret = nfserr_locks_held; | |
f7a4d872 | 4899 | break; |
1af71cc8 JL |
4900 | case NFS4_LOCK_STID: |
4901 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4902 | if (ret) | |
4903 | break; | |
fc5a96c3 JL |
4904 | stp = openlockstateid(s); |
4905 | ret = nfserr_locks_held; | |
4906 | if (check_for_locks(stp->st_stid.sc_file, | |
4907 | lockowner(stp->st_stateowner))) | |
4908 | break; | |
e8568739 | 4909 | WARN_ON(!unhash_lock_stateid(stp)); |
1af71cc8 | 4910 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4911 | nfs4_put_stid(s); |
4912 | ret = nfs_ok; | |
1af71cc8 | 4913 | goto out; |
3bd64a5b BF |
4914 | case NFS4_REVOKED_DELEG_STID: |
4915 | dp = delegstateid(s); | |
2d4a532d JL |
4916 | list_del_init(&dp->dl_recall_lru); |
4917 | spin_unlock(&cl->cl_lock); | |
6011695d | 4918 | nfs4_put_stid(s); |
3bd64a5b | 4919 | ret = nfs_ok; |
1af71cc8 JL |
4920 | goto out; |
4921 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4922 | } |
1af71cc8 JL |
4923 | out_unlock: |
4924 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 4925 | out: |
e1ca12df BS |
4926 | return ret; |
4927 | } | |
4928 | ||
4c4cd222 N |
4929 | static inline int |
4930 | setlkflg (int type) | |
4931 | { | |
4932 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4933 | RD_STATE : WR_STATE; | |
4934 | } | |
1da177e4 | 4935 | |
dcef0413 | 4936 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4937 | { |
4938 | struct svc_fh *current_fh = &cstate->current_fh; | |
4939 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4940 | __be32 status; | |
4941 | ||
c0a5d93e BF |
4942 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4943 | if (status) | |
4944 | return status; | |
3bd64a5b BF |
4945 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4946 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4947 | /* |
4948 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4949 | * nfserr_replay_me from the previous step, and |
4950 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4951 | */ |
4952 | return nfserr_bad_stateid; | |
35a92fe8 | 4953 | down_write(&stp->st_rwsem); |
f7a4d872 | 4954 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
4955 | if (status == nfs_ok) |
4956 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
4957 | if (status != nfs_ok) | |
4958 | up_write(&stp->st_rwsem); | |
4959 | return status; | |
c0a5d93e BF |
4960 | } |
4961 | ||
1da177e4 LT |
4962 | /* |
4963 | * Checks for sequence id mutating operations. | |
4964 | */ | |
b37ad28b | 4965 | static __be32 |
dd453dfd | 4966 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4967 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4968 | struct nfs4_ol_stateid **stpp, |
4969 | struct nfsd_net *nn) | |
1da177e4 | 4970 | { |
0836f587 | 4971 | __be32 status; |
38c2f4b1 | 4972 | struct nfs4_stid *s; |
e17f99b7 | 4973 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4974 | |
8c10cbdb BH |
4975 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4976 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4977 | |
1da177e4 | 4978 | *stpp = NULL; |
2dd6e458 | 4979 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4980 | if (status) |
4981 | return status; | |
e17f99b7 | 4982 | stp = openlockstateid(s); |
58fb12e6 | 4983 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4984 | |
e17f99b7 | 4985 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4986 | if (!status) |
e17f99b7 | 4987 | *stpp = stp; |
fd911011 TM |
4988 | else |
4989 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4990 | return status; |
c0a5d93e | 4991 | } |
39325bd0 | 4992 | |
3320fef1 SK |
4993 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4994 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4995 | { |
4996 | __be32 status; | |
4997 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4998 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4999 | |
c0a5d93e | 5000 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5001 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5002 | if (status) |
5003 | return status; | |
4cbfc9f7 TM |
5004 | oo = openowner(stp->st_stateowner); |
5005 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
35a92fe8 | 5006 | up_write(&stp->st_rwsem); |
4cbfc9f7 | 5007 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5008 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5009 | } |
5010 | *stpp = stp; | |
3a4f98bb | 5011 | return nfs_ok; |
1da177e4 LT |
5012 | } |
5013 | ||
b37ad28b | 5014 | __be32 |
ca364317 | 5015 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5016 | struct nfsd4_open_confirm *oc) |
1da177e4 | 5017 | { |
b37ad28b | 5018 | __be32 status; |
fe0750e5 | 5019 | struct nfs4_openowner *oo; |
dcef0413 | 5020 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5021 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5022 | |
a6a9f18f AV |
5023 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
5024 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5025 | |
ca364317 | 5026 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
5027 | if (status) |
5028 | return status; | |
1da177e4 | 5029 | |
9072d5c6 | 5030 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 5031 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 5032 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 5033 | if (status) |
68b66e82 | 5034 | goto out; |
fe0750e5 | 5035 | oo = openowner(stp->st_stateowner); |
68b66e82 | 5036 | status = nfserr_bad_stateid; |
35a92fe8 JL |
5037 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
5038 | up_write(&stp->st_rwsem); | |
2585fc79 | 5039 | goto put_stateid; |
35a92fe8 | 5040 | } |
dad1c067 | 5041 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 5042 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
35a92fe8 | 5043 | up_write(&stp->st_rwsem); |
8c10cbdb | 5044 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 5045 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 5046 | |
2a4317c5 | 5047 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 5048 | status = nfs_ok; |
2585fc79 TM |
5049 | put_stateid: |
5050 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5051 | out: |
9411b1d4 | 5052 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5053 | return status; |
5054 | } | |
5055 | ||
6409a5a6 | 5056 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 5057 | { |
82c5ff1b | 5058 | if (!test_access(access, stp)) |
6409a5a6 | 5059 | return; |
11b9164a | 5060 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 5061 | clear_access(access, stp); |
6409a5a6 | 5062 | } |
f197c271 | 5063 | |
6409a5a6 BF |
5064 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
5065 | { | |
5066 | switch (to_access) { | |
5067 | case NFS4_SHARE_ACCESS_READ: | |
5068 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
5069 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5070 | break; | |
5071 | case NFS4_SHARE_ACCESS_WRITE: | |
5072 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
5073 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
5074 | break; | |
5075 | case NFS4_SHARE_ACCESS_BOTH: | |
5076 | break; | |
5077 | default: | |
063b0fb9 | 5078 | WARN_ON_ONCE(1); |
1da177e4 LT |
5079 | } |
5080 | } | |
5081 | ||
b37ad28b | 5082 | __be32 |
ca364317 BF |
5083 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
5084 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 5085 | struct nfsd4_open_downgrade *od) |
1da177e4 | 5086 | { |
b37ad28b | 5087 | __be32 status; |
dcef0413 | 5088 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5089 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5090 | |
a6a9f18f AV |
5091 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
5092 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5093 | |
c30e92df | 5094 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
5095 | if (od->od_deleg_want) |
5096 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
5097 | od->od_deleg_want); | |
1da177e4 | 5098 | |
c0a5d93e | 5099 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 5100 | &od->od_stateid, &stp, nn); |
9072d5c6 | 5101 | if (status) |
1da177e4 | 5102 | goto out; |
1da177e4 | 5103 | status = nfserr_inval; |
82c5ff1b | 5104 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 5105 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 5106 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 5107 | goto put_stateid; |
1da177e4 | 5108 | } |
ce0fc43c | 5109 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 5110 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 5111 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 5112 | goto put_stateid; |
1da177e4 | 5113 | } |
6409a5a6 | 5114 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 5115 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 5116 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 5117 | status = nfs_ok; |
0667b1e9 | 5118 | put_stateid: |
35a92fe8 | 5119 | up_write(&stp->st_rwsem); |
0667b1e9 | 5120 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5121 | out: |
9411b1d4 | 5122 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
5123 | return status; |
5124 | } | |
5125 | ||
f7a4d872 BF |
5126 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
5127 | { | |
acf9295b | 5128 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 5129 | bool unhashed; |
d83017f9 | 5130 | LIST_HEAD(reaplist); |
acf9295b | 5131 | |
f7a4d872 | 5132 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 5133 | spin_lock(&clp->cl_lock); |
e8568739 | 5134 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 5135 | |
d83017f9 | 5136 | if (clp->cl_minorversion) { |
e8568739 JL |
5137 | if (unhashed) |
5138 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
5139 | spin_unlock(&clp->cl_lock); |
5140 | free_ol_stateid_reaplist(&reaplist); | |
5141 | } else { | |
5142 | spin_unlock(&clp->cl_lock); | |
5143 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
5144 | if (unhashed) |
5145 | move_to_close_lru(s, clp->net); | |
d83017f9 | 5146 | } |
38c387b5 BF |
5147 | } |
5148 | ||
1da177e4 LT |
5149 | /* |
5150 | * nfs4_unlock_state() called after encode | |
5151 | */ | |
b37ad28b | 5152 | __be32 |
ca364317 | 5153 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5154 | struct nfsd4_close *close) |
1da177e4 | 5155 | { |
b37ad28b | 5156 | __be32 status; |
dcef0413 | 5157 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
5158 | struct net *net = SVC_NET(rqstp); |
5159 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 5160 | |
a6a9f18f AV |
5161 | dprintk("NFSD: nfsd4_close on file %pd\n", |
5162 | cstate->current_fh.fh_dentry); | |
1da177e4 | 5163 | |
f7a4d872 BF |
5164 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
5165 | &close->cl_stateid, | |
5166 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 5167 | &stp, nn); |
9411b1d4 | 5168 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 5169 | if (status) |
1da177e4 | 5170 | goto out; |
9767feb2 | 5171 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
35a92fe8 | 5172 | up_write(&stp->st_rwsem); |
1da177e4 | 5173 | |
f7a4d872 | 5174 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
5175 | |
5176 | /* put reference from nfs4_preprocess_seqid_op */ | |
5177 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5178 | out: |
1da177e4 LT |
5179 | return status; |
5180 | } | |
5181 | ||
b37ad28b | 5182 | __be32 |
ca364317 BF |
5183 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5184 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 5185 | { |
203a8c8e BF |
5186 | struct nfs4_delegation *dp; |
5187 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 5188 | struct nfs4_stid *s; |
b37ad28b | 5189 | __be32 status; |
3320fef1 | 5190 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5191 | |
ca364317 | 5192 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 5193 | return status; |
1da177e4 | 5194 | |
2dd6e458 | 5195 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 5196 | if (status) |
203a8c8e | 5197 | goto out; |
38c2f4b1 | 5198 | dp = delegstateid(s); |
d5477a8d | 5199 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 5200 | if (status) |
fd911011 | 5201 | goto put_stateid; |
203a8c8e | 5202 | |
3bd64a5b | 5203 | destroy_delegation(dp); |
fd911011 TM |
5204 | put_stateid: |
5205 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
5206 | out: |
5207 | return status; | |
5208 | } | |
5209 | ||
87df4de8 BH |
5210 | static inline u64 |
5211 | end_offset(u64 start, u64 len) | |
5212 | { | |
5213 | u64 end; | |
5214 | ||
5215 | end = start + len; | |
5216 | return end >= start ? end: NFS4_MAX_UINT64; | |
5217 | } | |
5218 | ||
5219 | /* last octet in a range */ | |
5220 | static inline u64 | |
5221 | last_byte_offset(u64 start, u64 len) | |
5222 | { | |
5223 | u64 end; | |
5224 | ||
063b0fb9 | 5225 | WARN_ON_ONCE(!len); |
87df4de8 BH |
5226 | end = start + len; |
5227 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
5228 | } | |
5229 | ||
1da177e4 LT |
5230 | /* |
5231 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
5232 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
5233 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
5234 | * locking, this prevents us from being completely protocol-compliant. The | |
5235 | * real solution to this problem is to start using unsigned file offsets in | |
5236 | * the VFS, but this is a very deep change! | |
5237 | */ | |
5238 | static inline void | |
5239 | nfs4_transform_lock_offset(struct file_lock *lock) | |
5240 | { | |
5241 | if (lock->fl_start < 0) | |
5242 | lock->fl_start = OFFSET_MAX; | |
5243 | if (lock->fl_end < 0) | |
5244 | lock->fl_end = OFFSET_MAX; | |
5245 | } | |
5246 | ||
cae80b30 JL |
5247 | static fl_owner_t |
5248 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 5249 | { |
cae80b30 JL |
5250 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
5251 | ||
5252 | nfs4_get_stateowner(&lo->lo_owner); | |
5253 | return owner; | |
aef9583b KM |
5254 | } |
5255 | ||
cae80b30 JL |
5256 | static void |
5257 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 5258 | { |
cae80b30 | 5259 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 5260 | |
cae80b30 | 5261 | if (lo) |
aef9583b | 5262 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
5263 | } |
5264 | ||
7b021967 | 5265 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
aef9583b KM |
5266 | .lm_get_owner = nfsd4_fl_get_owner, |
5267 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 5268 | }; |
1da177e4 LT |
5269 | |
5270 | static inline void | |
5271 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
5272 | { | |
fe0750e5 | 5273 | struct nfs4_lockowner *lo; |
1da177e4 | 5274 | |
d5b9026a | 5275 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
5276 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
5277 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
5278 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
5279 | if (!deny->ld_owner.data) |
5280 | /* We just don't care that much */ | |
5281 | goto nevermind; | |
fe0750e5 BF |
5282 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
5283 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 5284 | } else { |
7c13f344 BF |
5285 | nevermind: |
5286 | deny->ld_owner.len = 0; | |
5287 | deny->ld_owner.data = NULL; | |
d5b9026a N |
5288 | deny->ld_clientid.cl_boot = 0; |
5289 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
5290 | } |
5291 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
5292 | deny->ld_length = NFS4_MAX_UINT64; |
5293 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
5294 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
5295 | deny->ld_type = NFS4_READ_LT; | |
5296 | if (fl->fl_type != F_RDLCK) | |
5297 | deny->ld_type = NFS4_WRITE_LT; | |
5298 | } | |
5299 | ||
fe0750e5 | 5300 | static struct nfs4_lockowner * |
c8623999 | 5301 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 5302 | { |
d4f0489f | 5303 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 5304 | struct nfs4_stateowner *so; |
1da177e4 | 5305 | |
0a880a28 TM |
5306 | lockdep_assert_held(&clp->cl_lock); |
5307 | ||
d4f0489f TM |
5308 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
5309 | so_strhash) { | |
b3c32bcd TM |
5310 | if (so->so_is_open_owner) |
5311 | continue; | |
b5971afa KM |
5312 | if (same_owner_str(so, owner)) |
5313 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
5314 | } |
5315 | return NULL; | |
5316 | } | |
5317 | ||
c58c6610 | 5318 | static struct nfs4_lockowner * |
c8623999 | 5319 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
5320 | { |
5321 | struct nfs4_lockowner *lo; | |
5322 | ||
d4f0489f | 5323 | spin_lock(&clp->cl_lock); |
c8623999 | 5324 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 5325 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
5326 | return lo; |
5327 | } | |
5328 | ||
8f4b54c5 JL |
5329 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5330 | { | |
c58c6610 | 5331 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5332 | } |
5333 | ||
6b180f0b JL |
5334 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5335 | { | |
5336 | struct nfs4_lockowner *lo = lockowner(sop); | |
5337 | ||
5338 | kmem_cache_free(lockowner_slab, lo); | |
5339 | } | |
5340 | ||
5341 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5342 | .so_unhash = nfs4_unhash_lockowner, |
5343 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5344 | }; |
5345 | ||
1da177e4 LT |
5346 | /* |
5347 | * Alloc a lock owner structure. | |
5348 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5349 | * occurred. |
1da177e4 | 5350 | * |
16bfdaaf | 5351 | * strhashval = ownerstr_hashval |
1da177e4 | 5352 | */ |
fe0750e5 | 5353 | static struct nfs4_lockowner * |
c58c6610 TM |
5354 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5355 | struct nfs4_ol_stateid *open_stp, | |
5356 | struct nfsd4_lock *lock) | |
5357 | { | |
c58c6610 | 5358 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5359 | |
fe0750e5 BF |
5360 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5361 | if (!lo) | |
1da177e4 | 5362 | return NULL; |
fe0750e5 BF |
5363 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5364 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5365 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5366 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5367 | spin_lock(&clp->cl_lock); |
c8623999 | 5368 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
5369 | if (ret == NULL) { |
5370 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5371 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5372 | ret = lo; |
5373 | } else | |
d50ffded KM |
5374 | nfs4_free_stateowner(&lo->lo_owner); |
5375 | ||
d4f0489f | 5376 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 5377 | return ret; |
1da177e4 LT |
5378 | } |
5379 | ||
356a95ec JL |
5380 | static void |
5381 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5382 | struct nfs4_file *fp, struct inode *inode, | |
5383 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5384 | { |
d3b313a4 | 5385 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5386 | |
356a95ec JL |
5387 | lockdep_assert_held(&clp->cl_lock); |
5388 | ||
3d0fabd5 | 5389 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5390 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 5391 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 5392 | get_nfs4_file(fp); |
11b9164a | 5393 | stp->st_stid.sc_file = fp; |
b49e084d | 5394 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5395 | stp->st_access_bmap = 0; |
1da177e4 | 5396 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5397 | stp->st_openstp = open_stp; |
35a92fe8 | 5398 | init_rwsem(&stp->st_rwsem); |
3c87b9b7 | 5399 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5400 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5401 | spin_lock(&fp->fi_lock); |
5402 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5403 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5404 | } |
5405 | ||
c53530da JL |
5406 | static struct nfs4_ol_stateid * |
5407 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5408 | { | |
5409 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5410 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5411 | ||
5412 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5413 | |
5414 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5415 | if (lst->st_stid.sc_file == fp) { |
5416 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5417 | return lst; |
3d0fabd5 | 5418 | } |
c53530da JL |
5419 | } |
5420 | return NULL; | |
5421 | } | |
5422 | ||
356a95ec JL |
5423 | static struct nfs4_ol_stateid * |
5424 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5425 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5426 | bool *new) | |
5427 | { | |
5428 | struct nfs4_stid *ns = NULL; | |
5429 | struct nfs4_ol_stateid *lst; | |
5430 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5431 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5432 | ||
5433 | spin_lock(&clp->cl_lock); | |
5434 | lst = find_lock_stateid(lo, fi); | |
5435 | if (lst == NULL) { | |
5436 | spin_unlock(&clp->cl_lock); | |
5437 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5438 | if (ns == NULL) | |
5439 | return NULL; | |
5440 | ||
5441 | spin_lock(&clp->cl_lock); | |
5442 | lst = find_lock_stateid(lo, fi); | |
5443 | if (likely(!lst)) { | |
5444 | lst = openlockstateid(ns); | |
5445 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5446 | ns = NULL; | |
5447 | *new = true; | |
5448 | } | |
5449 | } | |
5450 | spin_unlock(&clp->cl_lock); | |
5451 | if (ns) | |
5452 | nfs4_put_stid(ns); | |
5453 | return lst; | |
5454 | } | |
c53530da | 5455 | |
fd39ca9a | 5456 | static int |
1da177e4 LT |
5457 | check_lock_length(u64 offset, u64 length) |
5458 | { | |
e7969315 KM |
5459 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
5460 | (length > ~offset))); | |
1da177e4 LT |
5461 | } |
5462 | ||
dcef0413 | 5463 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5464 | { |
11b9164a | 5465 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5466 | |
7214e860 JL |
5467 | lockdep_assert_held(&fp->fi_lock); |
5468 | ||
82c5ff1b | 5469 | if (test_access(access, lock_stp)) |
0997b173 | 5470 | return; |
12659651 | 5471 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5472 | set_access(access, lock_stp); |
0997b173 BF |
5473 | } |
5474 | ||
356a95ec JL |
5475 | static __be32 |
5476 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5477 | struct nfs4_ol_stateid *ost, | |
5478 | struct nfsd4_lock *lock, | |
5479 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5480 | { |
5db1c03f | 5481 | __be32 status; |
11b9164a | 5482 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5483 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5484 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 5485 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 BF |
5486 | struct nfs4_lockowner *lo; |
5487 | unsigned int strhashval; | |
5488 | ||
c8623999 | 5489 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 5490 | if (!lo) { |
76f6c9e1 | 5491 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
5492 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5493 | if (lo == NULL) | |
5494 | return nfserr_jukebox; | |
5495 | } else { | |
5496 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5497 | status = nfserr_bad_seqid; |
c53530da JL |
5498 | if (!cstate->minorversion && |
5499 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5500 | goto out; |
64a284d0 | 5501 | } |
c53530da | 5502 | |
356a95ec | 5503 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5504 | if (*lst == NULL) { |
5db1c03f JL |
5505 | status = nfserr_jukebox; |
5506 | goto out; | |
64a284d0 | 5507 | } |
5db1c03f JL |
5508 | status = nfs_ok; |
5509 | out: | |
5510 | nfs4_put_stateowner(&lo->lo_owner); | |
5511 | return status; | |
64a284d0 BF |
5512 | } |
5513 | ||
1da177e4 LT |
5514 | /* |
5515 | * LOCK operation | |
5516 | */ | |
b37ad28b | 5517 | __be32 |
ca364317 | 5518 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5519 | struct nfsd4_lock *lock) |
1da177e4 | 5520 | { |
fe0750e5 BF |
5521 | struct nfs4_openowner *open_sop = NULL; |
5522 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5523 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5524 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5525 | struct nfs4_file *fp; |
7d947842 | 5526 | struct file *filp = NULL; |
21179d81 JL |
5527 | struct file_lock *file_lock = NULL; |
5528 | struct file_lock *conflock = NULL; | |
b37ad28b | 5529 | __be32 status = 0; |
b34f27aa | 5530 | int lkflg; |
b8dd7b9a | 5531 | int err; |
5db1c03f | 5532 | bool new = false; |
3320fef1 SK |
5533 | struct net *net = SVC_NET(rqstp); |
5534 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5535 | |
5536 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5537 | (long long) lock->lk_offset, | |
5538 | (long long) lock->lk_length); | |
5539 | ||
1da177e4 LT |
5540 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5541 | return nfserr_inval; | |
5542 | ||
ca364317 | 5543 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5544 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5545 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5546 | return status; | |
5547 | } | |
5548 | ||
1da177e4 | 5549 | if (lock->lk_is_new) { |
684e5638 BF |
5550 | if (nfsd4_has_session(cstate)) |
5551 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 5552 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
5553 | &cstate->session->se_client->cl_clientid, |
5554 | sizeof(clientid_t)); | |
5555 | ||
1da177e4 | 5556 | status = nfserr_stale_clientid; |
2c142baa | 5557 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5558 | goto out; |
1da177e4 | 5559 | |
1da177e4 | 5560 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5561 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5562 | lock->lk_new_open_seqid, |
5563 | &lock->lk_new_open_stateid, | |
3320fef1 | 5564 | &open_stp, nn); |
37515177 | 5565 | if (status) |
1da177e4 | 5566 | goto out; |
35a92fe8 | 5567 | up_write(&open_stp->st_rwsem); |
fe0750e5 | 5568 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5569 | status = nfserr_bad_stateid; |
684e5638 | 5570 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 5571 | &lock->lk_new_clientid)) |
b34f27aa | 5572 | goto out; |
64a284d0 | 5573 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5574 | &lock_stp, &new); |
35a92fe8 JL |
5575 | if (status == nfs_ok) |
5576 | down_write(&lock_stp->st_rwsem); | |
3d0fabd5 | 5577 | } else { |
dd453dfd | 5578 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5579 | lock->lk_old_lock_seqid, |
5580 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5581 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5582 | } |
e1aaa891 BF |
5583 | if (status) |
5584 | goto out; | |
64a284d0 | 5585 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5586 | |
b34f27aa BF |
5587 | lkflg = setlkflg(lock->lk_type); |
5588 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5589 | if (status) | |
5590 | goto out; | |
5591 | ||
0dd395dc | 5592 | status = nfserr_grace; |
3320fef1 | 5593 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5594 | goto out; |
5595 | status = nfserr_no_grace; | |
3320fef1 | 5596 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5597 | goto out; |
5598 | ||
21179d81 JL |
5599 | file_lock = locks_alloc_lock(); |
5600 | if (!file_lock) { | |
5601 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5602 | status = nfserr_jukebox; | |
5603 | goto out; | |
5604 | } | |
5605 | ||
11b9164a | 5606 | fp = lock_stp->st_stid.sc_file; |
1da177e4 LT |
5607 | switch (lock->lk_type) { |
5608 | case NFS4_READ_LT: | |
5609 | case NFS4_READW_LT: | |
7214e860 JL |
5610 | spin_lock(&fp->fi_lock); |
5611 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5612 | if (filp) |
5613 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5614 | spin_unlock(&fp->fi_lock); |
21179d81 | 5615 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5616 | break; |
1da177e4 LT |
5617 | case NFS4_WRITE_LT: |
5618 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5619 | spin_lock(&fp->fi_lock); |
5620 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5621 | if (filp) |
5622 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5623 | spin_unlock(&fp->fi_lock); |
21179d81 | 5624 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5625 | break; |
1da177e4 LT |
5626 | default: |
5627 | status = nfserr_inval; | |
5628 | goto out; | |
5629 | } | |
f9d7562f BF |
5630 | if (!filp) { |
5631 | status = nfserr_openmode; | |
5632 | goto out; | |
5633 | } | |
aef9583b KM |
5634 | |
5635 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); | |
21179d81 JL |
5636 | file_lock->fl_pid = current->tgid; |
5637 | file_lock->fl_file = filp; | |
5638 | file_lock->fl_flags = FL_POSIX; | |
5639 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5640 | file_lock->fl_start = lock->lk_offset; | |
5641 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5642 | nfs4_transform_lock_offset(file_lock); | |
5643 | ||
5644 | conflock = locks_alloc_lock(); | |
5645 | if (!conflock) { | |
5646 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5647 | status = nfserr_jukebox; | |
5648 | goto out; | |
5649 | } | |
1da177e4 | 5650 | |
21179d81 | 5651 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5652 | switch (-err) { |
1da177e4 | 5653 | case 0: /* success! */ |
9767feb2 | 5654 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 5655 | status = 0; |
eb76b3fd AA |
5656 | break; |
5657 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5658 | status = nfserr_denied; | |
5659 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5660 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5661 | break; |
1da177e4 LT |
5662 | case (EDEADLK): |
5663 | status = nfserr_deadlock; | |
eb76b3fd | 5664 | break; |
3e772463 | 5665 | default: |
fd85b817 | 5666 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5667 | status = nfserrno(err); |
eb76b3fd | 5668 | break; |
1da177e4 | 5669 | } |
1da177e4 | 5670 | out: |
de18643d TM |
5671 | if (filp) |
5672 | fput(filp); | |
5db1c03f JL |
5673 | if (lock_stp) { |
5674 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5675 | if (cstate->replay_owner && | |
5676 | cstate->replay_owner != &lock_sop->lo_owner && | |
5677 | seqid_mutating_err(ntohl(status))) | |
5678 | lock_sop->lo_owner.so_seqid++; | |
5679 | ||
35a92fe8 JL |
5680 | up_write(&lock_stp->st_rwsem); |
5681 | ||
5db1c03f JL |
5682 | /* |
5683 | * If this is a new, never-before-used stateid, and we are | |
5684 | * returning an error, then just go ahead and release it. | |
5685 | */ | |
5686 | if (status && new) | |
5687 | release_lock_stateid(lock_stp); | |
5688 | ||
3d0fabd5 | 5689 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5690 | } |
0667b1e9 TM |
5691 | if (open_stp) |
5692 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5693 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5694 | if (file_lock) |
5695 | locks_free_lock(file_lock); | |
5696 | if (conflock) | |
5697 | locks_free_lock(conflock); | |
1da177e4 LT |
5698 | return status; |
5699 | } | |
5700 | ||
55ef1274 BF |
5701 | /* |
5702 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5703 | * so we do a temporary open here just to get an open file to pass to | |
5704 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5705 | * inode operation.) | |
5706 | */ | |
04da6e9d | 5707 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5708 | { |
5709 | struct file *file; | |
04da6e9d AV |
5710 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5711 | if (!err) { | |
5712 | err = nfserrno(vfs_test_lock(file, lock)); | |
fd891454 | 5713 | fput(file); |
04da6e9d | 5714 | } |
55ef1274 BF |
5715 | return err; |
5716 | } | |
5717 | ||
1da177e4 LT |
5718 | /* |
5719 | * LOCKT operation | |
5720 | */ | |
b37ad28b | 5721 | __be32 |
ca364317 BF |
5722 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5723 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5724 | { |
21179d81 | 5725 | struct file_lock *file_lock = NULL; |
5db1c03f | 5726 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5727 | __be32 status; |
7f2210fa | 5728 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5729 | |
5ccb0066 | 5730 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5731 | return nfserr_grace; |
5732 | ||
5733 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5734 | return nfserr_inval; | |
5735 | ||
9b2ef62b | 5736 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5737 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5738 | if (status) |
5739 | goto out; | |
5740 | } | |
1da177e4 | 5741 | |
75c096f7 | 5742 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5743 | goto out; |
1da177e4 | 5744 | |
21179d81 JL |
5745 | file_lock = locks_alloc_lock(); |
5746 | if (!file_lock) { | |
5747 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5748 | status = nfserr_jukebox; | |
5749 | goto out; | |
5750 | } | |
6cd90662 | 5751 | |
1da177e4 LT |
5752 | switch (lockt->lt_type) { |
5753 | case NFS4_READ_LT: | |
5754 | case NFS4_READW_LT: | |
21179d81 | 5755 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5756 | break; |
5757 | case NFS4_WRITE_LT: | |
5758 | case NFS4_WRITEW_LT: | |
21179d81 | 5759 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5760 | break; |
5761 | default: | |
2fdada03 | 5762 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5763 | status = nfserr_inval; |
5764 | goto out; | |
5765 | } | |
5766 | ||
c8623999 | 5767 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 5768 | if (lo) |
21179d81 JL |
5769 | file_lock->fl_owner = (fl_owner_t)lo; |
5770 | file_lock->fl_pid = current->tgid; | |
5771 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5772 | |
21179d81 JL |
5773 | file_lock->fl_start = lockt->lt_offset; |
5774 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5775 | |
21179d81 | 5776 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5777 | |
21179d81 | 5778 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5779 | if (status) |
fd85b817 | 5780 | goto out; |
04da6e9d | 5781 | |
21179d81 | 5782 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5783 | status = nfserr_denied; |
21179d81 | 5784 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5785 | } |
5786 | out: | |
5db1c03f JL |
5787 | if (lo) |
5788 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
5789 | if (file_lock) |
5790 | locks_free_lock(file_lock); | |
1da177e4 LT |
5791 | return status; |
5792 | } | |
5793 | ||
b37ad28b | 5794 | __be32 |
ca364317 | 5795 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5796 | struct nfsd4_locku *locku) |
1da177e4 | 5797 | { |
dcef0413 | 5798 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5799 | struct file *filp = NULL; |
21179d81 | 5800 | struct file_lock *file_lock = NULL; |
b37ad28b | 5801 | __be32 status; |
b8dd7b9a | 5802 | int err; |
3320fef1 SK |
5803 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5804 | ||
1da177e4 LT |
5805 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5806 | (long long) locku->lu_offset, | |
5807 | (long long) locku->lu_length); | |
5808 | ||
5809 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5810 | return nfserr_inval; | |
5811 | ||
9072d5c6 | 5812 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5813 | &locku->lu_stateid, NFS4_LOCK_STID, |
5814 | &stp, nn); | |
9072d5c6 | 5815 | if (status) |
1da177e4 | 5816 | goto out; |
11b9164a | 5817 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5818 | if (!filp) { |
5819 | status = nfserr_lock_range; | |
858cc573 | 5820 | goto put_stateid; |
f9d7562f | 5821 | } |
21179d81 JL |
5822 | file_lock = locks_alloc_lock(); |
5823 | if (!file_lock) { | |
5824 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5825 | status = nfserr_jukebox; | |
de18643d | 5826 | goto fput; |
21179d81 | 5827 | } |
6cd90662 | 5828 | |
21179d81 | 5829 | file_lock->fl_type = F_UNLCK; |
aef9583b | 5830 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 JL |
5831 | file_lock->fl_pid = current->tgid; |
5832 | file_lock->fl_file = filp; | |
5833 | file_lock->fl_flags = FL_POSIX; | |
5834 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5835 | file_lock->fl_start = locku->lu_offset; | |
5836 | ||
5837 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5838 | locku->lu_length); | |
5839 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5840 | |
21179d81 | 5841 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5842 | if (err) { |
fd85b817 | 5843 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5844 | goto out_nfserr; |
5845 | } | |
9767feb2 | 5846 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
de18643d TM |
5847 | fput: |
5848 | fput(filp); | |
858cc573 | 5849 | put_stateid: |
35a92fe8 | 5850 | up_write(&stp->st_rwsem); |
858cc573 | 5851 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 5852 | out: |
9411b1d4 | 5853 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5854 | if (file_lock) |
5855 | locks_free_lock(file_lock); | |
1da177e4 LT |
5856 | return status; |
5857 | ||
5858 | out_nfserr: | |
b8dd7b9a | 5859 | status = nfserrno(err); |
de18643d | 5860 | goto fput; |
1da177e4 LT |
5861 | } |
5862 | ||
5863 | /* | |
5864 | * returns | |
f9c00c3a JL |
5865 | * true: locks held by lockowner |
5866 | * false: no locks held by lockowner | |
1da177e4 | 5867 | */ |
f9c00c3a JL |
5868 | static bool |
5869 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 5870 | { |
bd61e0a9 | 5871 | struct file_lock *fl; |
f9c00c3a JL |
5872 | int status = false; |
5873 | struct file *filp = find_any_file(fp); | |
5874 | struct inode *inode; | |
bd61e0a9 | 5875 | struct file_lock_context *flctx; |
f9c00c3a JL |
5876 | |
5877 | if (!filp) { | |
5878 | /* Any valid lock stateid should have some sort of access */ | |
5879 | WARN_ON_ONCE(1); | |
5880 | return status; | |
5881 | } | |
5882 | ||
5883 | inode = file_inode(filp); | |
bd61e0a9 JL |
5884 | flctx = inode->i_flctx; |
5885 | ||
5886 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 5887 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
5888 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
5889 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
5890 | status = true; | |
5891 | break; | |
5892 | } | |
796dadfd | 5893 | } |
6109c850 | 5894 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 5895 | } |
f9c00c3a | 5896 | fput(filp); |
1da177e4 LT |
5897 | return status; |
5898 | } | |
5899 | ||
b37ad28b | 5900 | __be32 |
b591480b BF |
5901 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5902 | struct nfsd4_compound_state *cstate, | |
5903 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5904 | { |
5905 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5906 | struct nfs4_stateowner *sop; |
5907 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5908 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5909 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5910 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5911 | __be32 status; |
7f2210fa | 5912 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5913 | struct nfs4_client *clp; |
1da177e4 LT |
5914 | |
5915 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5916 | clid->cl_boot, clid->cl_id); | |
5917 | ||
4b24ca7d | 5918 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 5919 | if (status) |
51f5e783 | 5920 | return status; |
9b2ef62b | 5921 | |
d4f0489f | 5922 | clp = cstate->clp; |
fd44907c | 5923 | /* Find the matching lock stateowner */ |
d4f0489f | 5924 | spin_lock(&clp->cl_lock); |
882e9d25 | 5925 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5926 | so_strhash) { |
fd44907c | 5927 | |
882e9d25 JL |
5928 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5929 | continue; | |
fd44907c | 5930 | |
882e9d25 JL |
5931 | /* see if there are still any locks associated with it */ |
5932 | lo = lockowner(sop); | |
5933 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5934 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5935 | status = nfserr_locks_held; | |
5936 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 5937 | return status; |
882e9d25 | 5938 | } |
5adfd885 | 5939 | } |
882e9d25 | 5940 | |
b5971afa | 5941 | nfs4_get_stateowner(sop); |
882e9d25 | 5942 | break; |
1da177e4 | 5943 | } |
c58c6610 | 5944 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5945 | if (lo) |
5946 | release_lockowner(lo); | |
1da177e4 LT |
5947 | return status; |
5948 | } | |
5949 | ||
5950 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5951 | alloc_reclaim(void) |
1da177e4 | 5952 | { |
a55370a3 | 5953 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5954 | } |
5955 | ||
0ce0c2b5 | 5956 | bool |
52e19c09 | 5957 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5958 | { |
0ce0c2b5 | 5959 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5960 | |
52e19c09 | 5961 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5962 | return (crp && crp->cr_clp); |
c7b9a459 N |
5963 | } |
5964 | ||
1da177e4 LT |
5965 | /* |
5966 | * failure => all reset bets are off, nfserr_no_grace... | |
5967 | */ | |
772a9bbb | 5968 | struct nfs4_client_reclaim * |
52e19c09 | 5969 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5970 | { |
5971 | unsigned int strhashval; | |
772a9bbb | 5972 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5973 | |
a55370a3 N |
5974 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5975 | crp = alloc_reclaim(); | |
772a9bbb JL |
5976 | if (crp) { |
5977 | strhashval = clientstr_hashval(name); | |
5978 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5979 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5980 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5981 | crp->cr_clp = NULL; |
52e19c09 | 5982 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5983 | } |
5984 | return crp; | |
1da177e4 LT |
5985 | } |
5986 | ||
ce30e539 | 5987 | void |
52e19c09 | 5988 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5989 | { |
5990 | list_del(&crp->cr_strhash); | |
5991 | kfree(crp); | |
52e19c09 | 5992 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5993 | } |
5994 | ||
2a4317c5 | 5995 | void |
52e19c09 | 5996 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5997 | { |
5998 | struct nfs4_client_reclaim *crp = NULL; | |
5999 | int i; | |
6000 | ||
1da177e4 | 6001 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
6002 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
6003 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 6004 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 6005 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
6006 | } |
6007 | } | |
063b0fb9 | 6008 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
6009 | } |
6010 | ||
6011 | /* | |
6012 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 6013 | struct nfs4_client_reclaim * |
52e19c09 | 6014 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
6015 | { |
6016 | unsigned int strhashval; | |
1da177e4 LT |
6017 | struct nfs4_client_reclaim *crp = NULL; |
6018 | ||
278c931c | 6019 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 6020 | |
278c931c | 6021 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 6022 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 6023 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
6024 | return crp; |
6025 | } | |
6026 | } | |
6027 | return NULL; | |
6028 | } | |
6029 | ||
6030 | /* | |
6031 | * Called from OPEN. Look for clientid in reclaim list. | |
6032 | */ | |
b37ad28b | 6033 | __be32 |
0fe492db TM |
6034 | nfs4_check_open_reclaim(clientid_t *clid, |
6035 | struct nfsd4_compound_state *cstate, | |
6036 | struct nfsd_net *nn) | |
1da177e4 | 6037 | { |
0fe492db | 6038 | __be32 status; |
a52d726b JL |
6039 | |
6040 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
6041 | status = lookup_clientid(clid, cstate, nn); |
6042 | if (status) | |
a52d726b JL |
6043 | return nfserr_reclaim_bad; |
6044 | ||
3b3e7b72 JL |
6045 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
6046 | return nfserr_no_grace; | |
6047 | ||
0fe492db TM |
6048 | if (nfsd4_client_record_check(cstate->clp)) |
6049 | return nfserr_reclaim_bad; | |
6050 | ||
6051 | return nfs_ok; | |
1da177e4 LT |
6052 | } |
6053 | ||
65178db4 | 6054 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
6055 | static inline void |
6056 | put_client(struct nfs4_client *clp) | |
6057 | { | |
6058 | atomic_dec(&clp->cl_refcount); | |
6059 | } | |
6060 | ||
285abdee JL |
6061 | static struct nfs4_client * |
6062 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
6063 | { | |
6064 | struct nfs4_client *clp; | |
6065 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6066 | nfsd_net_id); | |
6067 | ||
6068 | if (!nfsd_netns_ready(nn)) | |
6069 | return NULL; | |
6070 | ||
6071 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6072 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
6073 | return clp; | |
6074 | } | |
6075 | return NULL; | |
6076 | } | |
6077 | ||
7ec0e36f | 6078 | u64 |
285abdee | 6079 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
6080 | { |
6081 | struct nfs4_client *clp; | |
6082 | u64 count = 0; | |
6083 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6084 | nfsd_net_id); | |
6085 | char buf[INET6_ADDRSTRLEN]; | |
6086 | ||
6087 | if (!nfsd_netns_ready(nn)) | |
6088 | return 0; | |
6089 | ||
6090 | spin_lock(&nn->client_lock); | |
6091 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6092 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
6093 | pr_info("NFS Client: %s\n", buf); | |
6094 | ++count; | |
6095 | } | |
6096 | spin_unlock(&nn->client_lock); | |
6097 | ||
6098 | return count; | |
6099 | } | |
65178db4 | 6100 | |
a0926d15 | 6101 | u64 |
285abdee | 6102 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
6103 | { |
6104 | u64 count = 0; | |
6105 | struct nfs4_client *clp; | |
6106 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6107 | nfsd_net_id); | |
6108 | ||
6109 | if (!nfsd_netns_ready(nn)) | |
6110 | return count; | |
6111 | ||
6112 | spin_lock(&nn->client_lock); | |
6113 | clp = nfsd_find_client(addr, addr_size); | |
6114 | if (clp) { | |
6115 | if (mark_client_expired_locked(clp) == nfs_ok) | |
6116 | ++count; | |
6117 | else | |
6118 | clp = NULL; | |
6119 | } | |
6120 | spin_unlock(&nn->client_lock); | |
6121 | ||
6122 | if (clp) | |
6123 | expire_client(clp); | |
6124 | ||
6125 | return count; | |
6126 | } | |
6127 | ||
69fc9edf | 6128 | u64 |
285abdee | 6129 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
6130 | { |
6131 | u64 count = 0; | |
6132 | struct nfs4_client *clp, *next; | |
6133 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6134 | nfsd_net_id); | |
6135 | LIST_HEAD(reaplist); | |
6136 | ||
6137 | if (!nfsd_netns_ready(nn)) | |
6138 | return count; | |
6139 | ||
6140 | spin_lock(&nn->client_lock); | |
6141 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6142 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
6143 | list_add(&clp->cl_lru, &reaplist); | |
6144 | if (max != 0 && ++count >= max) | |
6145 | break; | |
6146 | } | |
6147 | } | |
6148 | spin_unlock(&nn->client_lock); | |
6149 | ||
6150 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
6151 | expire_client(clp); | |
6152 | ||
6153 | return count; | |
6154 | } | |
6155 | ||
184c1847 BS |
6156 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
6157 | const char *type) | |
6158 | { | |
6159 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 6160 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
6161 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
6162 | } | |
6163 | ||
016200c3 JL |
6164 | static void |
6165 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
6166 | struct list_head *collect) | |
6167 | { | |
6168 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
6169 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6170 | nfsd_net_id); | |
6171 | ||
6172 | if (!collect) | |
6173 | return; | |
6174 | ||
6175 | lockdep_assert_held(&nn->client_lock); | |
6176 | atomic_inc(&clp->cl_refcount); | |
6177 | list_add(&lst->st_locks, collect); | |
6178 | } | |
6179 | ||
3c87b9b7 | 6180 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 6181 | struct list_head *collect, |
e8568739 | 6182 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
6183 | { |
6184 | struct nfs4_openowner *oop; | |
fc29171f | 6185 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 6186 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
6187 | u64 count = 0; |
6188 | ||
016200c3 | 6189 | spin_lock(&clp->cl_lock); |
fc29171f | 6190 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
6191 | list_for_each_entry_safe(stp, st_next, |
6192 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
6193 | list_for_each_entry_safe(lst, lst_next, | |
6194 | &stp->st_locks, st_locks) { | |
3738d50e | 6195 | if (func) { |
e8568739 JL |
6196 | if (func(lst)) |
6197 | nfsd_inject_add_lock_to_list(lst, | |
6198 | collect); | |
3738d50e | 6199 | } |
016200c3 JL |
6200 | ++count; |
6201 | /* | |
6202 | * Despite the fact that these functions deal | |
6203 | * with 64-bit integers for "count", we must | |
6204 | * ensure that it doesn't blow up the | |
6205 | * clp->cl_refcount. Throw a warning if we | |
6206 | * start to approach INT_MAX here. | |
6207 | */ | |
6208 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6209 | if (count == max) | |
6210 | goto out; | |
fc29171f BS |
6211 | } |
6212 | } | |
6213 | } | |
016200c3 JL |
6214 | out: |
6215 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
6216 | |
6217 | return count; | |
6218 | } | |
6219 | ||
016200c3 JL |
6220 | static u64 |
6221 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
6222 | u64 max) | |
fc29171f | 6223 | { |
016200c3 | 6224 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
6225 | } |
6226 | ||
016200c3 JL |
6227 | static u64 |
6228 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 6229 | { |
016200c3 | 6230 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
6231 | nfsd_print_count(clp, count, "locked files"); |
6232 | return count; | |
6233 | } | |
6234 | ||
016200c3 | 6235 | u64 |
285abdee | 6236 | nfsd_inject_print_locks(void) |
016200c3 JL |
6237 | { |
6238 | struct nfs4_client *clp; | |
6239 | u64 count = 0; | |
6240 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6241 | nfsd_net_id); | |
6242 | ||
6243 | if (!nfsd_netns_ready(nn)) | |
6244 | return 0; | |
6245 | ||
6246 | spin_lock(&nn->client_lock); | |
6247 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6248 | count += nfsd_print_client_locks(clp); | |
6249 | spin_unlock(&nn->client_lock); | |
6250 | ||
6251 | return count; | |
6252 | } | |
6253 | ||
6254 | static void | |
6255 | nfsd_reap_locks(struct list_head *reaplist) | |
6256 | { | |
6257 | struct nfs4_client *clp; | |
6258 | struct nfs4_ol_stateid *stp, *next; | |
6259 | ||
6260 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
6261 | list_del_init(&stp->st_locks); | |
6262 | clp = stp->st_stid.sc_client; | |
6263 | nfs4_put_stid(&stp->st_stid); | |
6264 | put_client(clp); | |
6265 | } | |
6266 | } | |
6267 | ||
6268 | u64 | |
285abdee | 6269 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
6270 | { |
6271 | unsigned int count = 0; | |
6272 | struct nfs4_client *clp; | |
6273 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6274 | nfsd_net_id); | |
6275 | LIST_HEAD(reaplist); | |
6276 | ||
6277 | if (!nfsd_netns_ready(nn)) | |
6278 | return count; | |
6279 | ||
6280 | spin_lock(&nn->client_lock); | |
6281 | clp = nfsd_find_client(addr, addr_size); | |
6282 | if (clp) | |
6283 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
6284 | spin_unlock(&nn->client_lock); | |
6285 | nfsd_reap_locks(&reaplist); | |
6286 | return count; | |
6287 | } | |
6288 | ||
6289 | u64 | |
285abdee | 6290 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
6291 | { |
6292 | u64 count = 0; | |
6293 | struct nfs4_client *clp; | |
6294 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6295 | nfsd_net_id); | |
6296 | LIST_HEAD(reaplist); | |
6297 | ||
6298 | if (!nfsd_netns_ready(nn)) | |
6299 | return count; | |
6300 | ||
6301 | spin_lock(&nn->client_lock); | |
6302 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6303 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
6304 | if (max != 0 && count >= max) | |
6305 | break; | |
6306 | } | |
6307 | spin_unlock(&nn->client_lock); | |
6308 | nfsd_reap_locks(&reaplist); | |
6309 | return count; | |
6310 | } | |
6311 | ||
82e05efa JL |
6312 | static u64 |
6313 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
6314 | struct list_head *collect, | |
6315 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
6316 | { |
6317 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
6318 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6319 | nfsd_net_id); | |
4dbdbda8 BS |
6320 | u64 count = 0; |
6321 | ||
82e05efa JL |
6322 | lockdep_assert_held(&nn->client_lock); |
6323 | ||
6324 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 6325 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 6326 | if (func) { |
4dbdbda8 | 6327 | func(oop); |
82e05efa JL |
6328 | if (collect) { |
6329 | atomic_inc(&clp->cl_refcount); | |
6330 | list_add(&oop->oo_perclient, collect); | |
6331 | } | |
6332 | } | |
6333 | ++count; | |
6334 | /* | |
6335 | * Despite the fact that these functions deal with | |
6336 | * 64-bit integers for "count", we must ensure that | |
6337 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6338 | * warning if we start to approach INT_MAX here. | |
6339 | */ | |
6340 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6341 | if (count == max) | |
4dbdbda8 BS |
6342 | break; |
6343 | } | |
82e05efa JL |
6344 | spin_unlock(&clp->cl_lock); |
6345 | ||
6346 | return count; | |
6347 | } | |
6348 | ||
6349 | static u64 | |
6350 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
6351 | { | |
6352 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
6353 | ||
6354 | nfsd_print_count(clp, count, "openowners"); | |
6355 | return count; | |
6356 | } | |
6357 | ||
6358 | static u64 | |
6359 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
6360 | struct list_head *collect, u64 max) | |
6361 | { | |
6362 | return nfsd_foreach_client_openowner(clp, max, collect, | |
6363 | unhash_openowner_locked); | |
6364 | } | |
6365 | ||
6366 | u64 | |
285abdee | 6367 | nfsd_inject_print_openowners(void) |
82e05efa JL |
6368 | { |
6369 | struct nfs4_client *clp; | |
6370 | u64 count = 0; | |
6371 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6372 | nfsd_net_id); | |
6373 | ||
6374 | if (!nfsd_netns_ready(nn)) | |
6375 | return 0; | |
6376 | ||
6377 | spin_lock(&nn->client_lock); | |
6378 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6379 | count += nfsd_print_client_openowners(clp); | |
6380 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
6381 | |
6382 | return count; | |
6383 | } | |
6384 | ||
82e05efa JL |
6385 | static void |
6386 | nfsd_reap_openowners(struct list_head *reaplist) | |
6387 | { | |
6388 | struct nfs4_client *clp; | |
6389 | struct nfs4_openowner *oop, *next; | |
6390 | ||
6391 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
6392 | list_del_init(&oop->oo_perclient); | |
6393 | clp = oop->oo_owner.so_client; | |
6394 | release_openowner(oop); | |
6395 | put_client(clp); | |
6396 | } | |
6397 | } | |
6398 | ||
6399 | u64 | |
285abdee JL |
6400 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6401 | size_t addr_size) | |
4dbdbda8 | 6402 | { |
82e05efa JL |
6403 | unsigned int count = 0; |
6404 | struct nfs4_client *clp; | |
6405 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6406 | nfsd_net_id); | |
6407 | LIST_HEAD(reaplist); | |
6408 | ||
6409 | if (!nfsd_netns_ready(nn)) | |
6410 | return count; | |
6411 | ||
6412 | spin_lock(&nn->client_lock); | |
6413 | clp = nfsd_find_client(addr, addr_size); | |
6414 | if (clp) | |
6415 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6416 | spin_unlock(&nn->client_lock); | |
6417 | nfsd_reap_openowners(&reaplist); | |
6418 | return count; | |
4dbdbda8 BS |
6419 | } |
6420 | ||
82e05efa | 6421 | u64 |
285abdee | 6422 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6423 | { |
82e05efa JL |
6424 | u64 count = 0; |
6425 | struct nfs4_client *clp; | |
6426 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6427 | nfsd_net_id); | |
6428 | LIST_HEAD(reaplist); | |
6429 | ||
6430 | if (!nfsd_netns_ready(nn)) | |
6431 | return count; | |
6432 | ||
6433 | spin_lock(&nn->client_lock); | |
6434 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6435 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6436 | max - count); | |
6437 | if (max != 0 && count >= max) | |
6438 | break; | |
6439 | } | |
6440 | spin_unlock(&nn->client_lock); | |
6441 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6442 | return count; |
6443 | } | |
6444 | ||
269de30f BS |
6445 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6446 | struct list_head *victims) | |
6447 | { | |
6448 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6449 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6450 | nfsd_net_id); | |
269de30f BS |
6451 | u64 count = 0; |
6452 | ||
98d5c7c5 JL |
6453 | lockdep_assert_held(&nn->client_lock); |
6454 | ||
6455 | spin_lock(&state_lock); | |
269de30f | 6456 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6457 | if (victims) { |
6458 | /* | |
6459 | * It's not safe to mess with delegations that have a | |
6460 | * non-zero dl_time. They might have already been broken | |
6461 | * and could be processed by the laundromat outside of | |
6462 | * the state_lock. Just leave them be. | |
6463 | */ | |
6464 | if (dp->dl_time != 0) | |
6465 | continue; | |
6466 | ||
98d5c7c5 | 6467 | atomic_inc(&clp->cl_refcount); |
3fcbbd24 | 6468 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6469 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 6470 | } |
98d5c7c5 JL |
6471 | ++count; |
6472 | /* | |
6473 | * Despite the fact that these functions deal with | |
6474 | * 64-bit integers for "count", we must ensure that | |
6475 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6476 | * warning if we start to approach INT_MAX here. | |
6477 | */ | |
6478 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6479 | if (count == max) | |
269de30f BS |
6480 | break; |
6481 | } | |
98d5c7c5 | 6482 | spin_unlock(&state_lock); |
269de30f BS |
6483 | return count; |
6484 | } | |
6485 | ||
98d5c7c5 JL |
6486 | static u64 |
6487 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6488 | { |
98d5c7c5 | 6489 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6490 | |
98d5c7c5 JL |
6491 | nfsd_print_count(clp, count, "delegations"); |
6492 | return count; | |
6493 | } | |
6494 | ||
6495 | u64 | |
285abdee | 6496 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6497 | { |
6498 | struct nfs4_client *clp; | |
6499 | u64 count = 0; | |
6500 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6501 | nfsd_net_id); | |
6502 | ||
6503 | if (!nfsd_netns_ready(nn)) | |
6504 | return 0; | |
269de30f | 6505 | |
98d5c7c5 JL |
6506 | spin_lock(&nn->client_lock); |
6507 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6508 | count += nfsd_print_client_delegations(clp); | |
6509 | spin_unlock(&nn->client_lock); | |
6510 | ||
6511 | return count; | |
6512 | } | |
6513 | ||
6514 | static void | |
6515 | nfsd_forget_delegations(struct list_head *reaplist) | |
6516 | { | |
6517 | struct nfs4_client *clp; | |
6518 | struct nfs4_delegation *dp, *next; | |
6519 | ||
6520 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6521 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6522 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6523 | revoke_delegation(dp); |
98d5c7c5 | 6524 | put_client(clp); |
2d4a532d | 6525 | } |
98d5c7c5 JL |
6526 | } |
6527 | ||
6528 | u64 | |
285abdee JL |
6529 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6530 | size_t addr_size) | |
98d5c7c5 JL |
6531 | { |
6532 | u64 count = 0; | |
6533 | struct nfs4_client *clp; | |
6534 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6535 | nfsd_net_id); | |
6536 | LIST_HEAD(reaplist); | |
6537 | ||
6538 | if (!nfsd_netns_ready(nn)) | |
6539 | return count; | |
6540 | ||
6541 | spin_lock(&nn->client_lock); | |
6542 | clp = nfsd_find_client(addr, addr_size); | |
6543 | if (clp) | |
6544 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6545 | spin_unlock(&nn->client_lock); | |
6546 | ||
6547 | nfsd_forget_delegations(&reaplist); | |
6548 | return count; | |
6549 | } | |
269de30f | 6550 | |
98d5c7c5 | 6551 | u64 |
285abdee | 6552 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6553 | { |
6554 | u64 count = 0; | |
6555 | struct nfs4_client *clp; | |
6556 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6557 | nfsd_net_id); | |
6558 | LIST_HEAD(reaplist); | |
6559 | ||
6560 | if (!nfsd_netns_ready(nn)) | |
6561 | return count; | |
6562 | ||
6563 | spin_lock(&nn->client_lock); | |
6564 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6565 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6566 | if (max != 0 && count >= max) | |
6567 | break; | |
6568 | } | |
6569 | spin_unlock(&nn->client_lock); | |
6570 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6571 | return count; |
6572 | } | |
6573 | ||
98d5c7c5 JL |
6574 | static void |
6575 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6576 | { |
98d5c7c5 JL |
6577 | struct nfs4_client *clp; |
6578 | struct nfs4_delegation *dp, *next; | |
269de30f | 6579 | |
98d5c7c5 | 6580 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6581 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6582 | clp = dp->dl_stid.sc_client; |
6583 | /* | |
6584 | * We skipped all entries that had a zero dl_time before, | |
6585 | * so we can now reset the dl_time back to 0. If a delegation | |
6586 | * break comes in now, then it won't make any difference since | |
6587 | * we're recalling it either way. | |
6588 | */ | |
6589 | spin_lock(&state_lock); | |
dff1399f | 6590 | dp->dl_time = 0; |
98d5c7c5 | 6591 | spin_unlock(&state_lock); |
269de30f | 6592 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6593 | put_client(clp); |
dff1399f | 6594 | } |
98d5c7c5 | 6595 | } |
269de30f | 6596 | |
98d5c7c5 | 6597 | u64 |
285abdee | 6598 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6599 | size_t addr_size) |
6600 | { | |
6601 | u64 count = 0; | |
6602 | struct nfs4_client *clp; | |
6603 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6604 | nfsd_net_id); | |
6605 | LIST_HEAD(reaplist); | |
6606 | ||
6607 | if (!nfsd_netns_ready(nn)) | |
6608 | return count; | |
6609 | ||
6610 | spin_lock(&nn->client_lock); | |
6611 | clp = nfsd_find_client(addr, addr_size); | |
6612 | if (clp) | |
6613 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6614 | spin_unlock(&nn->client_lock); | |
6615 | ||
6616 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6617 | return count; |
6618 | } | |
6619 | ||
98d5c7c5 | 6620 | u64 |
285abdee | 6621 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6622 | { |
6623 | u64 count = 0; | |
98d5c7c5 JL |
6624 | struct nfs4_client *clp, *next; |
6625 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6626 | nfsd_net_id); | |
6627 | LIST_HEAD(reaplist); | |
184c1847 | 6628 | |
98d5c7c5 JL |
6629 | if (!nfsd_netns_ready(nn)) |
6630 | return count; | |
184c1847 | 6631 | |
98d5c7c5 JL |
6632 | spin_lock(&nn->client_lock); |
6633 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6634 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6635 | if (max != 0 && ++count >= max) | |
6636 | break; | |
6637 | } | |
6638 | spin_unlock(&nn->client_lock); | |
6639 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6640 | return count; |
6641 | } | |
65178db4 BS |
6642 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6643 | ||
c2f1a551 MS |
6644 | /* |
6645 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6646 | * client may quite reasonably hang on to a delegation as long as it has | |
6647 | * the inode cached. This becomes an obvious problem the first time a | |
6648 | * client's inode cache approaches the size of the server's total memory. | |
6649 | * | |
6650 | * For now we avoid this problem by imposing a hard limit on the number | |
6651 | * of delegations, which varies according to the server's memory size. | |
6652 | */ | |
6653 | static void | |
6654 | set_max_delegations(void) | |
6655 | { | |
6656 | /* | |
6657 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6658 | * estimates suggest that in the worst case (where every delegation | |
6659 | * is for a different inode), a delegation could take about 1.5K, | |
6660 | * giving a worst case usage of about 6% of memory. | |
6661 | */ | |
6662 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6663 | } | |
6664 | ||
d85ed443 | 6665 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6666 | { |
6667 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6668 | int i; | |
6669 | ||
6670 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6671 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6672 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6673 | goto err; |
0a7ec377 SK |
6674 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6675 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6676 | if (!nn->unconf_id_hashtbl) | |
6677 | goto err_unconf_id; | |
1872de0e SK |
6678 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6679 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6680 | if (!nn->sessionid_hashtbl) | |
6681 | goto err_sessionid; | |
8daae4dc | 6682 | |
382a62e7 | 6683 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6684 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6685 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6686 | } |
1872de0e SK |
6687 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6688 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6689 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6690 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6691 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6692 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6693 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 6694 | spin_lock_init(&nn->client_lock); |
8daae4dc | 6695 | |
09121281 | 6696 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 6697 | get_net(net); |
09121281 | 6698 | |
8daae4dc | 6699 | return 0; |
382a62e7 | 6700 | |
1872de0e | 6701 | err_sessionid: |
9b531137 | 6702 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
6703 | err_unconf_id: |
6704 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
6705 | err: |
6706 | return -ENOMEM; | |
8daae4dc SK |
6707 | } |
6708 | ||
6709 | static void | |
4dce0ac9 | 6710 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6711 | { |
6712 | int i; | |
6713 | struct nfs4_client *clp = NULL; | |
6714 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6715 | ||
6716 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6717 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6718 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6719 | destroy_client(clp); | |
6720 | } | |
6721 | } | |
a99454aa | 6722 | |
2b905635 KM |
6723 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6724 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6725 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6726 | destroy_client(clp); | |
6727 | } | |
a99454aa SK |
6728 | } |
6729 | ||
1872de0e | 6730 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6731 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6732 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6733 | put_net(net); |
8daae4dc SK |
6734 | } |
6735 | ||
f252bc68 | 6736 | int |
d85ed443 | 6737 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6738 | { |
5e1533c7 | 6739 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6740 | int ret; |
6741 | ||
d85ed443 | 6742 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6743 | if (ret) |
6744 | return ret; | |
2c142baa | 6745 | nn->boot_time = get_seconds(); |
a51c84ed | 6746 | nn->grace_ended = false; |
c87fb4a3 | 6747 | nn->nfsd4_manager.block_opens = true; |
d4318acd JL |
6748 | locks_start_grace(net, &nn->nfsd4_manager); |
6749 | nfsd4_client_tracking_init(net); | |
d85ed443 | 6750 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6751 | nn->nfsd4_grace, net); |
6752 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6753 | return 0; |
6754 | } | |
6755 | ||
6756 | /* initialization to perform when the nfsd service is started: */ | |
6757 | ||
6758 | int | |
6759 | nfs4_state_start(void) | |
6760 | { | |
6761 | int ret; | |
6762 | ||
b5a1a81e | 6763 | ret = set_callback_cred(); |
d85ed443 SK |
6764 | if (ret) |
6765 | return -ENOMEM; | |
51a54568 | 6766 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
6767 | if (laundry_wq == NULL) { |
6768 | ret = -ENOMEM; | |
6769 | goto out_recovery; | |
6770 | } | |
b5a1a81e BF |
6771 | ret = nfsd4_create_callback_queue(); |
6772 | if (ret) | |
6773 | goto out_free_laundry; | |
09121281 | 6774 | |
c2f1a551 | 6775 | set_max_delegations(); |
d85ed443 | 6776 | |
b5a1a81e | 6777 | return 0; |
d85ed443 | 6778 | |
b5a1a81e BF |
6779 | out_free_laundry: |
6780 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6781 | out_recovery: |
b5a1a81e | 6782 | return ret; |
1da177e4 LT |
6783 | } |
6784 | ||
f252bc68 | 6785 | void |
4dce0ac9 | 6786 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6787 | { |
1da177e4 | 6788 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6789 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6790 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6791 | |
4dce0ac9 SK |
6792 | cancel_delayed_work_sync(&nn->laundromat_work); |
6793 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6794 | |
1da177e4 | 6795 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6796 | spin_lock(&state_lock); |
e8c69d17 | 6797 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6798 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 6799 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 6800 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 6801 | } |
cdc97505 | 6802 | spin_unlock(&state_lock); |
1da177e4 LT |
6803 | list_for_each_safe(pos, next, &reaplist) { |
6804 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6805 | list_del_init(&dp->dl_recall_lru); |
8287f009 | 6806 | put_clnt_odstate(dp->dl_clnt_odstate); |
afbda402 | 6807 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
6011695d | 6808 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6809 | } |
6810 | ||
3320fef1 | 6811 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6812 | nfs4_state_destroy_net(net); |
1da177e4 LT |
6813 | } |
6814 | ||
6815 | void | |
6816 | nfs4_state_shutdown(void) | |
6817 | { | |
5e8d5c29 | 6818 | destroy_workqueue(laundry_wq); |
c3935e30 | 6819 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6820 | } |
8b70484c TM |
6821 | |
6822 | static void | |
6823 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6824 | { | |
37c593c5 TM |
6825 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6826 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6827 | } |
6828 | ||
6829 | static void | |
6830 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6831 | { | |
37c593c5 TM |
6832 | if (cstate->minorversion) { |
6833 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6834 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6835 | } | |
6836 | } | |
6837 | ||
6838 | void | |
6839 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6840 | { | |
6841 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6842 | } |
6843 | ||
62cd4a59 TM |
6844 | /* |
6845 | * functions to set current state id | |
6846 | */ | |
9428fe1a TM |
6847 | void |
6848 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6849 | { | |
6850 | put_stateid(cstate, &odp->od_stateid); | |
6851 | } | |
6852 | ||
8b70484c TM |
6853 | void |
6854 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6855 | { | |
6856 | put_stateid(cstate, &open->op_stateid); | |
6857 | } | |
6858 | ||
62cd4a59 TM |
6859 | void |
6860 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6861 | { | |
6862 | put_stateid(cstate, &close->cl_stateid); | |
6863 | } | |
6864 | ||
6865 | void | |
6866 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6867 | { | |
6868 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6869 | } | |
6870 | ||
6871 | /* | |
6872 | * functions to consume current state id | |
6873 | */ | |
1e97b519 | 6874 | |
9428fe1a TM |
6875 | void |
6876 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6877 | { | |
6878 | get_stateid(cstate, &odp->od_stateid); | |
6879 | } | |
6880 | ||
6881 | void | |
6882 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6883 | { | |
6884 | get_stateid(cstate, &drp->dr_stateid); | |
6885 | } | |
6886 | ||
1e97b519 TM |
6887 | void |
6888 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6889 | { | |
6890 | get_stateid(cstate, &fsp->fr_stateid); | |
6891 | } | |
6892 | ||
6893 | void | |
6894 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6895 | { | |
6896 | get_stateid(cstate, &setattr->sa_stateid); | |
6897 | } | |
6898 | ||
8b70484c TM |
6899 | void |
6900 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6901 | { | |
6902 | get_stateid(cstate, &close->cl_stateid); | |
6903 | } | |
6904 | ||
6905 | void | |
62cd4a59 | 6906 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6907 | { |
62cd4a59 | 6908 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6909 | } |
30813e27 TM |
6910 | |
6911 | void | |
6912 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6913 | { | |
6914 | get_stateid(cstate, &read->rd_stateid); | |
6915 | } | |
6916 | ||
6917 | void | |
6918 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6919 | { | |
6920 | get_stateid(cstate, &write->wr_stateid); | |
6921 | } |