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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> |
6282cd56 | 44 | #include <linux/hash.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 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
f9c00c3a | 73 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 74 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* Locking: */ |
77 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
b401be22 JL |
88 | /* |
89 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
90 | * the refcount on the open stateid to drop. | |
91 | */ | |
92 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
93 | ||
abf1135b CH |
94 | static struct kmem_cache *openowner_slab; |
95 | static struct kmem_cache *lockowner_slab; | |
96 | static struct kmem_cache *file_slab; | |
97 | static struct kmem_cache *stateid_slab; | |
98 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 99 | |
1da177e4 LT |
100 | void |
101 | nfs4_lock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_lock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
66b2b9b2 | 106 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 107 | |
f0f51f5c | 108 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 109 | { |
f0f51f5c | 110 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
111 | } |
112 | ||
f0f51f5c | 113 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 114 | { |
f0f51f5c | 115 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
116 | return nfserr_jukebox; |
117 | ses->se_flags |= NFS4_SESSION_DEAD; | |
118 | return nfs_ok; | |
508dc6e1 BH |
119 | } |
120 | ||
1da177e4 LT |
121 | void |
122 | nfs4_unlock_state(void) | |
123 | { | |
353ab6e9 | 124 | mutex_unlock(&client_mutex); |
1da177e4 LT |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
221a6876 BF |
132 | static __be32 get_client_locked(struct nfs4_client *clp) |
133 | { | |
0a880a28 TM |
134 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
135 | ||
136 | lockdep_assert_held(&nn->client_lock); | |
137 | ||
221a6876 BF |
138 | if (is_client_expired(clp)) |
139 | return nfserr_expired; | |
140 | atomic_inc(&clp->cl_refcount); | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | /* must be called under the client_lock */ | |
145 | static inline void | |
146 | renew_client_locked(struct nfs4_client *clp) | |
147 | { | |
148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
149 | ||
150 | if (is_client_expired(clp)) { | |
151 | WARN_ON(1); | |
152 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
153 | __func__, | |
154 | clp->cl_clientid.cl_boot, | |
155 | clp->cl_clientid.cl_id); | |
156 | return; | |
157 | } | |
158 | ||
159 | dprintk("renewing client (clientid %08x/%08x)\n", | |
160 | clp->cl_clientid.cl_boot, | |
161 | clp->cl_clientid.cl_id); | |
162 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
163 | clp->cl_time = get_seconds(); | |
164 | } | |
165 | ||
166 | static inline void | |
167 | renew_client(struct nfs4_client *clp) | |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
171 | spin_lock(&nn->client_lock); | |
172 | renew_client_locked(clp); | |
173 | spin_unlock(&nn->client_lock); | |
174 | } | |
175 | ||
ba138435 | 176 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 177 | { |
0a880a28 TM |
178 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
179 | ||
180 | lockdep_assert_held(&nn->client_lock); | |
181 | ||
221a6876 BF |
182 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
183 | return; | |
184 | if (!is_client_expired(clp)) | |
185 | renew_client_locked(clp); | |
186 | } | |
187 | ||
4b24ca7d JL |
188 | static void put_client_renew(struct nfs4_client *clp) |
189 | { | |
190 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
191 | ||
d6c249b4 JL |
192 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
193 | return; | |
194 | if (!is_client_expired(clp)) | |
195 | renew_client_locked(clp); | |
4b24ca7d JL |
196 | spin_unlock(&nn->client_lock); |
197 | } | |
198 | ||
d4e19e70 TM |
199 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
200 | { | |
201 | __be32 status; | |
202 | ||
203 | if (is_session_dead(ses)) | |
204 | return nfserr_badsession; | |
205 | status = get_client_locked(ses->se_client); | |
206 | if (status) | |
207 | return status; | |
208 | atomic_inc(&ses->se_ref); | |
209 | return nfs_ok; | |
210 | } | |
211 | ||
212 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
213 | { | |
214 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
215 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
216 | ||
217 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
218 | |
219 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
220 | free_session(ses); | |
221 | put_client_renew_locked(clp); | |
222 | } | |
223 | ||
224 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
225 | { | |
226 | struct nfs4_client *clp = ses->se_client; | |
227 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
228 | ||
229 | spin_lock(&nn->client_lock); | |
230 | nfsd4_put_session_locked(ses); | |
231 | spin_unlock(&nn->client_lock); | |
232 | } | |
233 | ||
7ffb5880 | 234 | static int |
d4f0489f | 235 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
236 | { |
237 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 238 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
239 | } |
240 | ||
241 | static struct nfs4_openowner * | |
242 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 243 | struct nfs4_client *clp) |
7ffb5880 TM |
244 | { |
245 | struct nfs4_stateowner *so; | |
7ffb5880 | 246 | |
d4f0489f | 247 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 248 | |
d4f0489f TM |
249 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
250 | so_strhash) { | |
7ffb5880 TM |
251 | if (!so->so_is_open_owner) |
252 | continue; | |
d4f0489f | 253 | if (same_owner_str(so, &open->op_owner)) { |
7ffb5880 | 254 | atomic_inc(&so->so_count); |
d4f0489f | 255 | return openowner(so); |
7ffb5880 TM |
256 | } |
257 | } | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | static struct nfs4_openowner * | |
262 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 263 | struct nfs4_client *clp) |
7ffb5880 TM |
264 | { |
265 | struct nfs4_openowner *oo; | |
266 | ||
d4f0489f TM |
267 | spin_lock(&clp->cl_lock); |
268 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
269 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
270 | return oo; |
271 | } | |
272 | ||
1da177e4 LT |
273 | static inline u32 |
274 | opaque_hashval(const void *ptr, int nbytes) | |
275 | { | |
276 | unsigned char *cptr = (unsigned char *) ptr; | |
277 | ||
278 | u32 x = 0; | |
279 | while (nbytes--) { | |
280 | x *= 37; | |
281 | x += *cptr++; | |
282 | } | |
283 | return x; | |
284 | } | |
285 | ||
32513b40 BF |
286 | static void nfsd4_free_file(struct nfs4_file *f) |
287 | { | |
288 | kmem_cache_free(file_slab, f); | |
289 | } | |
290 | ||
13cd2184 N |
291 | static inline void |
292 | put_nfs4_file(struct nfs4_file *fi) | |
293 | { | |
02e1215f JL |
294 | might_lock(&state_lock); |
295 | ||
cdc97505 | 296 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 297 | hlist_del(&fi->fi_hash); |
cdc97505 | 298 | spin_unlock(&state_lock); |
32513b40 | 299 | nfsd4_free_file(fi); |
8b671b80 | 300 | } |
13cd2184 N |
301 | } |
302 | ||
303 | static inline void | |
304 | get_nfs4_file(struct nfs4_file *fi) | |
305 | { | |
8b671b80 | 306 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
307 | } |
308 | ||
de18643d TM |
309 | static struct file * |
310 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
311 | { | |
312 | if (f->fi_fds[oflag]) | |
313 | return get_file(f->fi_fds[oflag]); | |
314 | return NULL; | |
315 | } | |
316 | ||
317 | static struct file * | |
318 | find_writeable_file_locked(struct nfs4_file *f) | |
319 | { | |
320 | struct file *ret; | |
321 | ||
322 | lockdep_assert_held(&f->fi_lock); | |
323 | ||
324 | ret = __nfs4_get_fd(f, O_WRONLY); | |
325 | if (!ret) | |
326 | ret = __nfs4_get_fd(f, O_RDWR); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | static struct file * | |
331 | find_writeable_file(struct nfs4_file *f) | |
332 | { | |
333 | struct file *ret; | |
334 | ||
335 | spin_lock(&f->fi_lock); | |
336 | ret = find_writeable_file_locked(f); | |
337 | spin_unlock(&f->fi_lock); | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
342 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
343 | { | |
344 | struct file *ret; | |
345 | ||
346 | lockdep_assert_held(&f->fi_lock); | |
347 | ||
348 | ret = __nfs4_get_fd(f, O_RDONLY); | |
349 | if (!ret) | |
350 | ret = __nfs4_get_fd(f, O_RDWR); | |
351 | return ret; | |
352 | } | |
353 | ||
354 | static struct file * | |
355 | find_readable_file(struct nfs4_file *f) | |
356 | { | |
357 | struct file *ret; | |
358 | ||
359 | spin_lock(&f->fi_lock); | |
360 | ret = find_readable_file_locked(f); | |
361 | spin_unlock(&f->fi_lock); | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | static struct file * | |
367 | find_any_file(struct nfs4_file *f) | |
368 | { | |
369 | struct file *ret; | |
370 | ||
371 | spin_lock(&f->fi_lock); | |
372 | ret = __nfs4_get_fd(f, O_RDWR); | |
373 | if (!ret) { | |
374 | ret = __nfs4_get_fd(f, O_WRONLY); | |
375 | if (!ret) | |
376 | ret = __nfs4_get_fd(f, O_RDONLY); | |
377 | } | |
378 | spin_unlock(&f->fi_lock); | |
379 | return ret; | |
380 | } | |
381 | ||
02a3508d | 382 | static atomic_long_t num_delegations; |
697ce9be | 383 | unsigned long max_delegations; |
ef0f3390 N |
384 | |
385 | /* | |
386 | * Open owner state (share locks) | |
387 | */ | |
388 | ||
16bfdaaf BF |
389 | /* hash tables for lock and open owners */ |
390 | #define OWNER_HASH_BITS 8 | |
391 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
392 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 393 | |
d4f0489f | 394 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
395 | { |
396 | unsigned int ret; | |
397 | ||
398 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 399 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 400 | } |
ef0f3390 | 401 | |
ef0f3390 N |
402 | /* hash table for nfs4_file */ |
403 | #define FILE_HASH_BITS 8 | |
404 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 405 | |
ca943217 | 406 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 407 | { |
ca943217 TM |
408 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
409 | } | |
410 | ||
411 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
412 | { | |
413 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
414 | } | |
415 | ||
416 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
417 | { | |
418 | return fh1->fh_size == fh2->fh_size && | |
419 | !memcmp(fh1->fh_base.fh_pad, | |
420 | fh2->fh_base.fh_pad, | |
421 | fh1->fh_size); | |
ddc04c41 BF |
422 | } |
423 | ||
89876f8c | 424 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 425 | |
12659651 JL |
426 | static void |
427 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 428 | { |
7214e860 JL |
429 | lockdep_assert_held(&fp->fi_lock); |
430 | ||
12659651 JL |
431 | if (access & NFS4_SHARE_ACCESS_WRITE) |
432 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
433 | if (access & NFS4_SHARE_ACCESS_READ) | |
434 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
435 | } |
436 | ||
12659651 JL |
437 | static __be32 |
438 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 439 | { |
7214e860 JL |
440 | lockdep_assert_held(&fp->fi_lock); |
441 | ||
12659651 JL |
442 | /* Does this access mode make sense? */ |
443 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
444 | return nfserr_inval; | |
445 | ||
baeb4ff0 JL |
446 | /* Does it conflict with a deny mode already set? */ |
447 | if ((access & fp->fi_share_deny) != 0) | |
448 | return nfserr_share_denied; | |
449 | ||
12659651 JL |
450 | __nfs4_file_get_access(fp, access); |
451 | return nfs_ok; | |
998db52c BF |
452 | } |
453 | ||
baeb4ff0 JL |
454 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
455 | { | |
456 | /* Common case is that there is no deny mode. */ | |
457 | if (deny) { | |
458 | /* Does this deny mode make sense? */ | |
459 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
460 | return nfserr_inval; | |
461 | ||
462 | if ((deny & NFS4_SHARE_DENY_READ) && | |
463 | atomic_read(&fp->fi_access[O_RDONLY])) | |
464 | return nfserr_share_denied; | |
465 | ||
466 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
467 | atomic_read(&fp->fi_access[O_WRONLY])) | |
468 | return nfserr_share_denied; | |
469 | } | |
470 | return nfs_ok; | |
471 | } | |
472 | ||
998db52c | 473 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 474 | { |
de18643d TM |
475 | might_lock(&fp->fi_lock); |
476 | ||
477 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
478 | struct file *f1 = NULL; | |
479 | struct file *f2 = NULL; | |
480 | ||
6d338b51 | 481 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 482 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 483 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
484 | spin_unlock(&fp->fi_lock); |
485 | if (f1) | |
486 | fput(f1); | |
487 | if (f2) | |
488 | fput(f2); | |
f9d7562f BF |
489 | } |
490 | } | |
491 | ||
12659651 | 492 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 493 | { |
12659651 JL |
494 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
495 | ||
496 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 497 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
498 | if (access & NFS4_SHARE_ACCESS_READ) |
499 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
500 | } |
501 | ||
6011695d TM |
502 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
503 | struct kmem_cache *slab) | |
2a74aba7 | 504 | { |
3abdb607 | 505 | struct nfs4_stid *stid; |
6136d2b4 | 506 | int new_id; |
2a74aba7 | 507 | |
f8338834 | 508 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
509 | if (!stid) |
510 | return NULL; | |
511 | ||
4770d722 JL |
512 | idr_preload(GFP_KERNEL); |
513 | spin_lock(&cl->cl_lock); | |
514 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
515 | spin_unlock(&cl->cl_lock); | |
516 | idr_preload_end(); | |
ebd6c707 | 517 | if (new_id < 0) |
3abdb607 | 518 | goto out_free; |
2a74aba7 | 519 | stid->sc_client = cl; |
3abdb607 BF |
520 | stid->sc_stateid.si_opaque.so_id = new_id; |
521 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 522 | /* Will be incremented before return to client: */ |
72c0b0fb | 523 | atomic_set(&stid->sc_count, 1); |
996e0938 | 524 | |
996e0938 | 525 | /* |
3abdb607 BF |
526 | * It shouldn't be a problem to reuse an opaque stateid value. |
527 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
528 | * example, a stray write retransmission could be accepted by | |
529 | * the server when it should have been rejected. Therefore, | |
530 | * adopt a trick from the sctp code to attempt to maximize the | |
531 | * amount of time until an id is reused, by ensuring they always | |
532 | * "increase" (mod INT_MAX): | |
996e0938 | 533 | */ |
3abdb607 BF |
534 | return stid; |
535 | out_free: | |
2c44a234 | 536 | kmem_cache_free(slab, stid); |
3abdb607 | 537 | return NULL; |
2a74aba7 BF |
538 | } |
539 | ||
b49e084d | 540 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 541 | { |
6011695d TM |
542 | struct nfs4_stid *stid; |
543 | struct nfs4_ol_stateid *stp; | |
544 | ||
545 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
546 | if (!stid) | |
547 | return NULL; | |
548 | ||
549 | stp = openlockstateid(stid); | |
550 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
551 | return stp; | |
552 | } | |
553 | ||
554 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
555 | { | |
6011695d TM |
556 | kmem_cache_free(deleg_slab, stid); |
557 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
558 | } |
559 | ||
6282cd56 N |
560 | /* |
561 | * When we recall a delegation, we should be careful not to hand it | |
562 | * out again straight away. | |
563 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
564 | * in which the filehandles of recalled delegations are "stored". | |
565 | * If a filehandle appear in either filter, a delegation is blocked. | |
566 | * When a delegation is recalled, the filehandle is stored in the "new" | |
567 | * filter. | |
568 | * Every 30 seconds we swap the filters and clear the "new" one, | |
569 | * unless both are empty of course. | |
570 | * | |
571 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
572 | * low 3 bytes as hash-table indices. | |
573 | * | |
f54fe962 | 574 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
575 | * is used to manage concurrent access. Testing does not need the lock |
576 | * except when swapping the two filters. | |
577 | */ | |
f54fe962 | 578 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
579 | static struct bloom_pair { |
580 | int entries, old_entries; | |
581 | time_t swap_time; | |
582 | int new; /* index into 'set' */ | |
583 | DECLARE_BITMAP(set[2], 256); | |
584 | } blocked_delegations; | |
585 | ||
586 | static int delegation_blocked(struct knfsd_fh *fh) | |
587 | { | |
588 | u32 hash; | |
589 | struct bloom_pair *bd = &blocked_delegations; | |
590 | ||
591 | if (bd->entries == 0) | |
592 | return 0; | |
593 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 594 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
595 | if (seconds_since_boot() - bd->swap_time > 30) { |
596 | bd->entries -= bd->old_entries; | |
597 | bd->old_entries = bd->entries; | |
598 | memset(bd->set[bd->new], 0, | |
599 | sizeof(bd->set[0])); | |
600 | bd->new = 1-bd->new; | |
601 | bd->swap_time = seconds_since_boot(); | |
602 | } | |
f54fe962 | 603 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
604 | } |
605 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
606 | if (test_bit(hash&255, bd->set[0]) && | |
607 | test_bit((hash>>8)&255, bd->set[0]) && | |
608 | test_bit((hash>>16)&255, bd->set[0])) | |
609 | return 1; | |
610 | ||
611 | if (test_bit(hash&255, bd->set[1]) && | |
612 | test_bit((hash>>8)&255, bd->set[1]) && | |
613 | test_bit((hash>>16)&255, bd->set[1])) | |
614 | return 1; | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | static void block_delegations(struct knfsd_fh *fh) | |
620 | { | |
621 | u32 hash; | |
622 | struct bloom_pair *bd = &blocked_delegations; | |
623 | ||
624 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
625 | ||
f54fe962 | 626 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
627 | __set_bit(hash&255, bd->set[bd->new]); |
628 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
629 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
630 | if (bd->entries == 0) | |
631 | bd->swap_time = seconds_since_boot(); | |
632 | bd->entries += 1; | |
f54fe962 | 633 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
634 | } |
635 | ||
1da177e4 | 636 | static struct nfs4_delegation * |
f9416e28 | 637 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
638 | { |
639 | struct nfs4_delegation *dp; | |
02a3508d | 640 | long n; |
1da177e4 LT |
641 | |
642 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
643 | n = atomic_long_inc_return(&num_delegations); |
644 | if (n < 0 || n > max_delegations) | |
645 | goto out_dec; | |
6282cd56 | 646 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 647 | goto out_dec; |
996e0938 | 648 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 649 | if (dp == NULL) |
02a3508d | 650 | goto out_dec; |
6011695d TM |
651 | |
652 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
653 | /* |
654 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
655 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
656 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
657 | */ |
658 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
659 | INIT_LIST_HEAD(&dp->dl_perfile); |
660 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 661 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 662 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 663 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 664 | return dp; |
02a3508d TM |
665 | out_dec: |
666 | atomic_long_dec(&num_delegations); | |
667 | return NULL; | |
1da177e4 LT |
668 | } |
669 | ||
670 | void | |
6011695d | 671 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 672 | { |
11b9164a | 673 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
674 | struct nfs4_client *clp = s->sc_client; |
675 | ||
4770d722 JL |
676 | might_lock(&clp->cl_lock); |
677 | ||
b401be22 JL |
678 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
679 | wake_up_all(&close_wq); | |
6011695d | 680 | return; |
b401be22 | 681 | } |
6011695d | 682 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 683 | spin_unlock(&clp->cl_lock); |
6011695d | 684 | s->sc_free(s); |
11b9164a TM |
685 | if (fp) |
686 | put_nfs4_file(fp); | |
1da177e4 LT |
687 | } |
688 | ||
acfdf5c3 | 689 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 690 | { |
417c6629 JL |
691 | lockdep_assert_held(&state_lock); |
692 | ||
cbf7a75b BF |
693 | if (!fp->fi_lease) |
694 | return; | |
acfdf5c3 BF |
695 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
696 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
697 | fp->fi_lease = NULL; | |
4ee63624 | 698 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
699 | fp->fi_deleg_file = NULL; |
700 | } | |
1da177e4 LT |
701 | } |
702 | ||
6136d2b4 BF |
703 | static void unhash_stid(struct nfs4_stid *s) |
704 | { | |
3abdb607 | 705 | s->sc_type = 0; |
6136d2b4 BF |
706 | } |
707 | ||
931ee56c BH |
708 | static void |
709 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
710 | { | |
cdc97505 | 711 | lockdep_assert_held(&state_lock); |
417c6629 | 712 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 713 | |
67cb1279 | 714 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 715 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
716 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
717 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
718 | } | |
719 | ||
1da177e4 | 720 | static void |
42690676 | 721 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 722 | { |
11b9164a | 723 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 724 | |
42690676 JL |
725 | lockdep_assert_held(&state_lock); |
726 | ||
b0fc29d6 | 727 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
728 | /* Ensure that deleg break won't try to requeue it */ |
729 | ++dp->dl_time; | |
417c6629 | 730 | spin_lock(&fp->fi_lock); |
931ee56c | 731 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 732 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
733 | list_del_init(&dp->dl_perfile); |
734 | spin_unlock(&fp->fi_lock); | |
f8338834 | 735 | if (fp) |
02e1215f | 736 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
737 | } |
738 | ||
3bd64a5b BF |
739 | static void destroy_delegation(struct nfs4_delegation *dp) |
740 | { | |
42690676 JL |
741 | spin_lock(&state_lock); |
742 | unhash_delegation_locked(dp); | |
743 | spin_unlock(&state_lock); | |
6011695d | 744 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
745 | } |
746 | ||
747 | static void revoke_delegation(struct nfs4_delegation *dp) | |
748 | { | |
749 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
750 | ||
2d4a532d JL |
751 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
752 | ||
3bd64a5b | 753 | if (clp->cl_minorversion == 0) |
6011695d | 754 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 755 | else { |
3bd64a5b | 756 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
757 | spin_lock(&clp->cl_lock); |
758 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
759 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
760 | } |
761 | } | |
762 | ||
1da177e4 LT |
763 | /* |
764 | * SETCLIENTID state | |
765 | */ | |
766 | ||
ddc04c41 BF |
767 | static unsigned int clientid_hashval(u32 id) |
768 | { | |
769 | return id & CLIENT_HASH_MASK; | |
770 | } | |
771 | ||
772 | static unsigned int clientstr_hashval(const char *name) | |
773 | { | |
774 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
775 | } | |
776 | ||
f9d7562f BF |
777 | /* |
778 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
779 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
780 | * only what share bits are currently in force, but also what | |
781 | * combinations of share bits previous opens have used. This allows us | |
782 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
783 | * return an error if the client attempt to downgrade to a combination | |
784 | * of share bits not explicable by closing some of its previous opens. | |
785 | * | |
786 | * XXX: This enforcement is actually incomplete, since we don't keep | |
787 | * track of access/deny bit combinations; so, e.g., we allow: | |
788 | * | |
789 | * OPEN allow read, deny write | |
790 | * OPEN allow both, deny none | |
791 | * DOWNGRADE allow read, deny none | |
792 | * | |
793 | * which we should reject. | |
794 | */ | |
5ae037e5 JL |
795 | static unsigned int |
796 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 797 | int i; |
5ae037e5 | 798 | unsigned int access = 0; |
f9d7562f | 799 | |
f9d7562f BF |
800 | for (i = 1; i < 4; i++) { |
801 | if (test_bit(i, &bmap)) | |
5ae037e5 | 802 | access |= i; |
f9d7562f | 803 | } |
5ae037e5 | 804 | return access; |
f9d7562f BF |
805 | } |
806 | ||
82c5ff1b JL |
807 | /* set share access for a given stateid */ |
808 | static inline void | |
809 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
810 | { | |
c11c591f JL |
811 | unsigned char mask = 1 << access; |
812 | ||
813 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
814 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
815 | } |
816 | ||
817 | /* clear share access for a given stateid */ | |
818 | static inline void | |
819 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
820 | { | |
c11c591f JL |
821 | unsigned char mask = 1 << access; |
822 | ||
823 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
824 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
825 | } |
826 | ||
827 | /* test whether a given stateid has access */ | |
828 | static inline bool | |
829 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
830 | { | |
c11c591f JL |
831 | unsigned char mask = 1 << access; |
832 | ||
833 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
834 | } |
835 | ||
ce0fc43c JL |
836 | /* set share deny for a given stateid */ |
837 | static inline void | |
c11c591f | 838 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 839 | { |
c11c591f JL |
840 | unsigned char mask = 1 << deny; |
841 | ||
842 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
843 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
844 | } |
845 | ||
846 | /* clear share deny for a given stateid */ | |
847 | static inline void | |
c11c591f | 848 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 849 | { |
c11c591f JL |
850 | unsigned char mask = 1 << deny; |
851 | ||
852 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
853 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
854 | } |
855 | ||
856 | /* test whether a given stateid is denying specific access */ | |
857 | static inline bool | |
c11c591f | 858 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 859 | { |
c11c591f JL |
860 | unsigned char mask = 1 << deny; |
861 | ||
862 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
863 | } |
864 | ||
865 | static int nfs4_access_to_omode(u32 access) | |
866 | { | |
8f34a430 | 867 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
868 | case NFS4_SHARE_ACCESS_READ: |
869 | return O_RDONLY; | |
870 | case NFS4_SHARE_ACCESS_WRITE: | |
871 | return O_WRONLY; | |
872 | case NFS4_SHARE_ACCESS_BOTH: | |
873 | return O_RDWR; | |
874 | } | |
063b0fb9 BF |
875 | WARN_ON_ONCE(1); |
876 | return O_RDONLY; | |
f9d7562f BF |
877 | } |
878 | ||
baeb4ff0 JL |
879 | /* |
880 | * A stateid that had a deny mode associated with it is being released | |
881 | * or downgraded. Recalculate the deny mode on the file. | |
882 | */ | |
883 | static void | |
884 | recalculate_deny_mode(struct nfs4_file *fp) | |
885 | { | |
886 | struct nfs4_ol_stateid *stp; | |
887 | ||
888 | spin_lock(&fp->fi_lock); | |
889 | fp->fi_share_deny = 0; | |
890 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
891 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
892 | spin_unlock(&fp->fi_lock); | |
893 | } | |
894 | ||
895 | static void | |
896 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
897 | { | |
898 | int i; | |
899 | bool change = false; | |
900 | ||
901 | for (i = 1; i < 4; i++) { | |
902 | if ((i & deny) != i) { | |
903 | change = true; | |
904 | clear_deny(i, stp); | |
905 | } | |
906 | } | |
907 | ||
908 | /* Recalculate per-file deny mode if there was a change */ | |
909 | if (change) | |
11b9164a | 910 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
911 | } |
912 | ||
82c5ff1b JL |
913 | /* release all access and file references for a given stateid */ |
914 | static void | |
915 | release_all_access(struct nfs4_ol_stateid *stp) | |
916 | { | |
917 | int i; | |
11b9164a | 918 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
919 | |
920 | if (fp && stp->st_deny_bmap != 0) | |
921 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
922 | |
923 | for (i = 1; i < 4; i++) { | |
924 | if (test_access(i, stp)) | |
11b9164a | 925 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
926 | clear_access(i, stp); |
927 | } | |
928 | } | |
929 | ||
6b180f0b JL |
930 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
931 | { | |
a819ecc1 JL |
932 | struct nfs4_client *clp = sop->so_client; |
933 | ||
934 | might_lock(&clp->cl_lock); | |
935 | ||
936 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 937 | return; |
8f4b54c5 | 938 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 939 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
940 | kfree(sop->so_owner.data); |
941 | sop->so_ops->so_free(sop); | |
942 | } | |
943 | ||
4ae098d3 | 944 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 945 | { |
11b9164a | 946 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 947 | |
1c755dc1 JL |
948 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
949 | ||
1d31a253 | 950 | spin_lock(&fp->fi_lock); |
529d7b2a | 951 | list_del(&stp->st_perfile); |
1d31a253 | 952 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
953 | list_del(&stp->st_perstateowner); |
954 | } | |
955 | ||
6011695d | 956 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 957 | { |
6011695d | 958 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 959 | |
6011695d | 960 | release_all_access(stp); |
d3134b10 JL |
961 | if (stp->st_stateowner) |
962 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 963 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
964 | } |
965 | ||
b49e084d | 966 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 967 | { |
b49e084d JL |
968 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
969 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
970 | struct file *file; |
971 | ||
b49e084d JL |
972 | file = find_any_file(stp->st_stid.sc_file); |
973 | if (file) | |
974 | filp_close(file, (fl_owner_t)lo); | |
975 | nfs4_free_ol_stateid(stid); | |
976 | } | |
977 | ||
2c41beb0 JL |
978 | /* |
979 | * Put the persistent reference to an already unhashed generic stateid, while | |
980 | * holding the cl_lock. If it's the last reference, then put it onto the | |
981 | * reaplist for later destruction. | |
982 | */ | |
983 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
984 | struct list_head *reaplist) | |
985 | { | |
986 | struct nfs4_stid *s = &stp->st_stid; | |
987 | struct nfs4_client *clp = s->sc_client; | |
988 | ||
989 | lockdep_assert_held(&clp->cl_lock); | |
990 | ||
991 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
992 | ||
993 | if (!atomic_dec_and_test(&s->sc_count)) { | |
994 | wake_up_all(&close_wq); | |
995 | return; | |
996 | } | |
997 | ||
998 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
999 | list_add(&stp->st_locks, reaplist); | |
1000 | } | |
1001 | ||
3c1c995c | 1002 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1003 | { |
1c755dc1 JL |
1004 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1005 | ||
3c1c995c JL |
1006 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1007 | ||
1008 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1009 | unhash_ol_stateid(stp); |
6136d2b4 | 1010 | unhash_stid(&stp->st_stid); |
3c1c995c JL |
1011 | } |
1012 | ||
1013 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1014 | { | |
1015 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1016 | ||
1017 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1018 | unhash_lock_stateid(stp); | |
1c755dc1 | 1019 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1020 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1021 | } |
1022 | ||
c58c6610 | 1023 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1024 | { |
d4f0489f | 1025 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1026 | |
d4f0489f | 1027 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1028 | |
8f4b54c5 JL |
1029 | list_del_init(&lo->lo_owner.so_strhash); |
1030 | } | |
1031 | ||
2c41beb0 JL |
1032 | /* |
1033 | * Free a list of generic stateids that were collected earlier after being | |
1034 | * fully unhashed. | |
1035 | */ | |
1036 | static void | |
1037 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1038 | { | |
1039 | struct nfs4_ol_stateid *stp; | |
1040 | ||
1041 | might_sleep(); | |
1042 | ||
1043 | while (!list_empty(reaplist)) { | |
1044 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1045 | st_locks); | |
1046 | list_del(&stp->st_locks); | |
1047 | stp->st_stid.sc_free(&stp->st_stid); | |
1048 | } | |
1049 | } | |
1050 | ||
3c1c995c | 1051 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1052 | { |
d4f0489f | 1053 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1054 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1055 | struct list_head reaplist; |
529d7b2a | 1056 | |
3c1c995c | 1057 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1058 | |
3c1c995c JL |
1059 | spin_lock(&clp->cl_lock); |
1060 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1061 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1062 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1063 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1064 | unhash_lock_stateid(stp); |
2c41beb0 | 1065 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1066 | } |
d4f0489f | 1067 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1068 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1069 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1070 | } |
1071 | ||
d83017f9 JL |
1072 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1073 | struct list_head *reaplist) | |
3c87b9b7 TM |
1074 | { |
1075 | struct nfs4_ol_stateid *stp; | |
1076 | ||
1077 | while (!list_empty(&open_stp->st_locks)) { | |
1078 | stp = list_entry(open_stp->st_locks.next, | |
1079 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1080 | unhash_lock_stateid(stp); |
1081 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1082 | } |
1083 | } | |
1084 | ||
d83017f9 JL |
1085 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1086 | struct list_head *reaplist) | |
2283963f | 1087 | { |
2c41beb0 JL |
1088 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1089 | ||
4ae098d3 | 1090 | unhash_ol_stateid(stp); |
d83017f9 | 1091 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1092 | } |
1093 | ||
1094 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1095 | { | |
2c41beb0 JL |
1096 | LIST_HEAD(reaplist); |
1097 | ||
1098 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1099 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1100 | put_ol_stateid_locked(stp, &reaplist); |
1101 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1102 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1103 | } |
1104 | ||
7ffb5880 | 1105 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1106 | { |
d4f0489f | 1107 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1108 | |
d4f0489f | 1109 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1110 | |
8f4b54c5 JL |
1111 | list_del_init(&oo->oo_owner.so_strhash); |
1112 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1113 | } |
1114 | ||
f7a4d872 BF |
1115 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1116 | { | |
217526e7 JL |
1117 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1118 | nfsd_net_id); | |
1119 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1120 | |
217526e7 JL |
1121 | spin_lock(&nn->client_lock); |
1122 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1123 | if (s) { |
d3134b10 | 1124 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1125 | oo->oo_last_closed_stid = NULL; |
1126 | } | |
217526e7 JL |
1127 | spin_unlock(&nn->client_lock); |
1128 | if (s) | |
1129 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1130 | } |
1131 | ||
2c41beb0 | 1132 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1133 | { |
1134 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1135 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1136 | struct list_head reaplist; |
7ffb5880 | 1137 | |
2c41beb0 | 1138 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1139 | |
2c41beb0 JL |
1140 | spin_lock(&clp->cl_lock); |
1141 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1142 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1143 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1144 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1145 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1146 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1147 | } |
d4f0489f | 1148 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1149 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1150 | release_last_closed_stateid(oo); |
6b180f0b | 1151 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1152 | } |
1153 | ||
5282fd72 ME |
1154 | static inline int |
1155 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1156 | { | |
1157 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1158 | ||
1159 | return sid->sequence % SESSION_HASH_SIZE; | |
1160 | } | |
1161 | ||
8f199b82 | 1162 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1163 | static inline void |
1164 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1165 | { | |
1166 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1167 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1168 | } | |
8f199b82 TM |
1169 | #else |
1170 | static inline void | |
1171 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1172 | { | |
1173 | } | |
1174 | #endif | |
1175 | ||
9411b1d4 BF |
1176 | /* |
1177 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1178 | * won't be used for replay. | |
1179 | */ | |
1180 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1181 | { | |
1182 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1183 | ||
1184 | if (nfserr == nfserr_replay_me) | |
1185 | return; | |
1186 | ||
1187 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1188 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1189 | return; |
1190 | } | |
1191 | if (!so) | |
1192 | return; | |
1193 | if (so->so_is_open_owner) | |
1194 | release_last_closed_stateid(openowner(so)); | |
1195 | so->so_seqid++; | |
1196 | return; | |
1197 | } | |
5282fd72 | 1198 | |
ec6b5d7b AA |
1199 | static void |
1200 | gen_sessionid(struct nfsd4_session *ses) | |
1201 | { | |
1202 | struct nfs4_client *clp = ses->se_client; | |
1203 | struct nfsd4_sessionid *sid; | |
1204 | ||
1205 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1206 | sid->clientid = clp->cl_clientid; | |
1207 | sid->sequence = current_sessionid++; | |
1208 | sid->reserved = 0; | |
1209 | } | |
1210 | ||
1211 | /* | |
a649637c AA |
1212 | * The protocol defines ca_maxresponssize_cached to include the size of |
1213 | * the rpc header, but all we need to cache is the data starting after | |
1214 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1215 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1216 | * value that is the number of bytes in our cache plus a few additional | |
1217 | * bytes. In order to stay on the safe side, and not promise more than | |
1218 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1219 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1220 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1221 | * for the SEQUENCE op response: | |
1222 | */ | |
1223 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1224 | ||
557ce264 AA |
1225 | static void |
1226 | free_session_slots(struct nfsd4_session *ses) | |
1227 | { | |
1228 | int i; | |
1229 | ||
1230 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1231 | kfree(ses->se_slots[i]); | |
1232 | } | |
1233 | ||
a649637c | 1234 | /* |
efe0cb6d BF |
1235 | * We don't actually need to cache the rpc and session headers, so we |
1236 | * can allocate a little less for each slot: | |
1237 | */ | |
55c760cf | 1238 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1239 | { |
55c760cf | 1240 | u32 size; |
efe0cb6d | 1241 | |
55c760cf BF |
1242 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1243 | size = 0; | |
1244 | else | |
1245 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1246 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1247 | } |
ec6b5d7b | 1248 | |
5b6feee9 BF |
1249 | /* |
1250 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1251 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1252 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1253 | */ |
55c760cf | 1254 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1255 | { |
55c760cf BF |
1256 | u32 slotsize = slot_bytes(ca); |
1257 | u32 num = ca->maxreqs; | |
5b6feee9 | 1258 | int avail; |
ec6b5d7b | 1259 | |
5b6feee9 | 1260 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1261 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1262 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1263 | num = min_t(int, num, avail / slotsize); |
1264 | nfsd_drc_mem_used += num * slotsize; | |
1265 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1266 | |
5b6feee9 BF |
1267 | return num; |
1268 | } | |
ec6b5d7b | 1269 | |
55c760cf | 1270 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1271 | { |
55c760cf BF |
1272 | int slotsize = slot_bytes(ca); |
1273 | ||
4bd9b0f4 | 1274 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1275 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1276 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1277 | } |
ec6b5d7b | 1278 | |
60810e54 KM |
1279 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1280 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1281 | { |
60810e54 KM |
1282 | int numslots = fattrs->maxreqs; |
1283 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1284 | struct nfsd4_session *new; |
1285 | int mem, i; | |
a649637c | 1286 | |
5b6feee9 BF |
1287 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1288 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1289 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1290 | |
5b6feee9 BF |
1291 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1292 | if (!new) | |
1293 | return NULL; | |
557ce264 | 1294 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1295 | for (i = 0; i < numslots; i++) { |
55c760cf | 1296 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1297 | if (!new->se_slots[i]) |
557ce264 | 1298 | goto out_free; |
557ce264 | 1299 | } |
60810e54 KM |
1300 | |
1301 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1302 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1303 | ||
5b6feee9 BF |
1304 | return new; |
1305 | out_free: | |
1306 | while (i--) | |
1307 | kfree(new->se_slots[i]); | |
1308 | kfree(new); | |
1309 | return NULL; | |
ec6b5d7b AA |
1310 | } |
1311 | ||
19cf5c02 BF |
1312 | static void free_conn(struct nfsd4_conn *c) |
1313 | { | |
1314 | svc_xprt_put(c->cn_xprt); | |
1315 | kfree(c); | |
1316 | } | |
ec6b5d7b | 1317 | |
19cf5c02 BF |
1318 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1319 | { | |
1320 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1321 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1322 | |
19cf5c02 BF |
1323 | spin_lock(&clp->cl_lock); |
1324 | if (!list_empty(&c->cn_persession)) { | |
1325 | list_del(&c->cn_persession); | |
1326 | free_conn(c); | |
1327 | } | |
eea49806 | 1328 | nfsd4_probe_callback(clp); |
2e4b7239 | 1329 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1330 | } |
ec6b5d7b | 1331 | |
d29c374c | 1332 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1333 | { |
c7662518 | 1334 | struct nfsd4_conn *conn; |
ec6b5d7b | 1335 | |
c7662518 BF |
1336 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1337 | if (!conn) | |
db90681d | 1338 | return NULL; |
c7662518 BF |
1339 | svc_xprt_get(rqstp->rq_xprt); |
1340 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1341 | conn->cn_flags = flags; |
db90681d BF |
1342 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1343 | return conn; | |
1344 | } | |
a649637c | 1345 | |
328ead28 BF |
1346 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1347 | { | |
1348 | conn->cn_session = ses; | |
1349 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1350 | } |
1351 | ||
db90681d | 1352 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1353 | { |
db90681d | 1354 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1355 | |
c7662518 | 1356 | spin_lock(&clp->cl_lock); |
328ead28 | 1357 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1358 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1359 | } |
1360 | ||
21b75b01 | 1361 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1362 | { |
19cf5c02 | 1363 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1364 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1365 | } |
1366 | ||
e1ff371f | 1367 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1368 | { |
21b75b01 | 1369 | int ret; |
ec6b5d7b | 1370 | |
db90681d | 1371 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1372 | ret = nfsd4_register_conn(conn); |
1373 | if (ret) | |
1374 | /* oops; xprt is already down: */ | |
1375 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1376 | /* We may have gained or lost a callback channel: */ |
1377 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1378 | } |
ec6b5d7b | 1379 | |
e1ff371f | 1380 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1381 | { |
1382 | u32 dir = NFS4_CDFC4_FORE; | |
1383 | ||
e1ff371f | 1384 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1385 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1386 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1387 | } |
1388 | ||
1389 | /* must be called under client_lock */ | |
19cf5c02 | 1390 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1391 | { |
19cf5c02 BF |
1392 | struct nfs4_client *clp = s->se_client; |
1393 | struct nfsd4_conn *c; | |
ec6b5d7b | 1394 | |
19cf5c02 BF |
1395 | spin_lock(&clp->cl_lock); |
1396 | while (!list_empty(&s->se_conns)) { | |
1397 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1398 | list_del_init(&c->cn_persession); | |
1399 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1400 | |
19cf5c02 BF |
1401 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1402 | free_conn(c); | |
ec6b5d7b | 1403 | |
19cf5c02 BF |
1404 | spin_lock(&clp->cl_lock); |
1405 | } | |
1406 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1407 | } |
ec6b5d7b | 1408 | |
1377b69e BF |
1409 | static void __free_session(struct nfsd4_session *ses) |
1410 | { | |
1377b69e BF |
1411 | free_session_slots(ses); |
1412 | kfree(ses); | |
1413 | } | |
1414 | ||
66b2b9b2 | 1415 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1416 | { |
19cf5c02 | 1417 | nfsd4_del_conns(ses); |
55c760cf | 1418 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1419 | __free_session(ses); |
c7662518 BF |
1420 | } |
1421 | ||
135ae827 | 1422 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1423 | { |
a827bcb2 | 1424 | int idx; |
1872de0e | 1425 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1426 | |
ec6b5d7b AA |
1427 | new->se_client = clp; |
1428 | gen_sessionid(new); | |
ec6b5d7b | 1429 | |
c7662518 BF |
1430 | INIT_LIST_HEAD(&new->se_conns); |
1431 | ||
ac7c46f2 | 1432 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1433 | new->se_flags = cses->flags; |
8b5ce5cd | 1434 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1435 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1436 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1437 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1438 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1439 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1440 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1441 | spin_unlock(&clp->cl_lock); |
60810e54 | 1442 | |
dcbeaa68 | 1443 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1444 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1445 | /* |
1446 | * This is a little silly; with sessions there's no real | |
1447 | * use for the callback address. Use the peer address | |
1448 | * as a reasonable default for now, but consider fixing | |
1449 | * the rpc client not to require an address in the | |
1450 | * future: | |
1451 | */ | |
edd76786 BF |
1452 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1453 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1454 | } |
ec6b5d7b AA |
1455 | } |
1456 | ||
9089f1b4 | 1457 | /* caller must hold client_lock */ |
5282fd72 | 1458 | static struct nfsd4_session * |
d4e19e70 | 1459 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1460 | { |
1461 | struct nfsd4_session *elem; | |
1462 | int idx; | |
1872de0e | 1463 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1464 | |
0a880a28 TM |
1465 | lockdep_assert_held(&nn->client_lock); |
1466 | ||
5282fd72 ME |
1467 | dump_sessionid(__func__, sessionid); |
1468 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1469 | /* Search in the appropriate list */ |
1872de0e | 1470 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1471 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1472 | NFS4_MAX_SESSIONID_LEN)) { | |
1473 | return elem; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | dprintk("%s: session not found\n", __func__); | |
1478 | return NULL; | |
1479 | } | |
1480 | ||
d4e19e70 TM |
1481 | static struct nfsd4_session * |
1482 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1483 | __be32 *ret) | |
1484 | { | |
1485 | struct nfsd4_session *session; | |
1486 | __be32 status = nfserr_badsession; | |
1487 | ||
1488 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1489 | if (!session) | |
1490 | goto out; | |
1491 | status = nfsd4_get_session_locked(session); | |
1492 | if (status) | |
1493 | session = NULL; | |
1494 | out: | |
1495 | *ret = status; | |
1496 | return session; | |
1497 | } | |
1498 | ||
9089f1b4 | 1499 | /* caller must hold client_lock */ |
7116ed6b | 1500 | static void |
5282fd72 | 1501 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1502 | { |
0a880a28 TM |
1503 | struct nfs4_client *clp = ses->se_client; |
1504 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1505 | ||
1506 | lockdep_assert_held(&nn->client_lock); | |
1507 | ||
7116ed6b | 1508 | list_del(&ses->se_hash); |
4c649378 | 1509 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1510 | list_del(&ses->se_perclnt); |
4c649378 | 1511 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1512 | } |
1513 | ||
1da177e4 LT |
1514 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1515 | static int | |
2c142baa | 1516 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1517 | { |
2c142baa | 1518 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1519 | return 0; |
60adfc50 | 1520 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1521 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1522 | return 1; |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * XXX Should we use a slab cache ? | |
1527 | * This type of memory management is somewhat inefficient, but we use it | |
1528 | * anyway since SETCLIENTID is not a common operation. | |
1529 | */ | |
35bba9a3 | 1530 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1531 | { |
1532 | struct nfs4_client *clp; | |
d4f0489f | 1533 | int i; |
1da177e4 | 1534 | |
35bba9a3 BF |
1535 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1536 | if (clp == NULL) | |
1537 | return NULL; | |
67114fe6 | 1538 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1539 | if (clp->cl_name.data == NULL) |
1540 | goto err_no_name; | |
1541 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1542 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1543 | if (!clp->cl_ownerstr_hashtbl) | |
1544 | goto err_no_hashtbl; | |
1545 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1546 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1547 | clp->cl_name.len = name.len; |
5694c93e TM |
1548 | INIT_LIST_HEAD(&clp->cl_sessions); |
1549 | idr_init(&clp->cl_stateids); | |
1550 | atomic_set(&clp->cl_refcount, 0); | |
1551 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1552 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1553 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1554 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1555 | INIT_LIST_HEAD(&clp->cl_lru); | |
1556 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1557 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1558 | spin_lock_init(&clp->cl_lock); | |
1559 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1560 | return clp; |
d4f0489f TM |
1561 | err_no_hashtbl: |
1562 | kfree(clp->cl_name.data); | |
1563 | err_no_name: | |
1564 | kfree(clp); | |
1565 | return NULL; | |
1da177e4 LT |
1566 | } |
1567 | ||
4dd86e15 | 1568 | static void |
1da177e4 LT |
1569 | free_client(struct nfs4_client *clp) |
1570 | { | |
792c95dd BF |
1571 | while (!list_empty(&clp->cl_sessions)) { |
1572 | struct nfsd4_session *ses; | |
1573 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1574 | se_perclnt); | |
1575 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1576 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1577 | free_session(ses); | |
792c95dd | 1578 | } |
4cb57e30 | 1579 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1580 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1581 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1582 | kfree(clp->cl_name.data); |
2d32b29a | 1583 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1584 | kfree(clp); |
1585 | } | |
1586 | ||
84d38ac9 | 1587 | /* must be called under the client_lock */ |
4beb345b | 1588 | static void |
84d38ac9 BH |
1589 | unhash_client_locked(struct nfs4_client *clp) |
1590 | { | |
4beb345b | 1591 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1592 | struct nfsd4_session *ses; |
1593 | ||
0a880a28 TM |
1594 | lockdep_assert_held(&nn->client_lock); |
1595 | ||
4beb345b TM |
1596 | /* Mark the client as expired! */ |
1597 | clp->cl_time = 0; | |
1598 | /* Make it invisible */ | |
1599 | if (!list_empty(&clp->cl_idhash)) { | |
1600 | list_del_init(&clp->cl_idhash); | |
1601 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1602 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1603 | else | |
1604 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1605 | } | |
1606 | list_del_init(&clp->cl_lru); | |
4c649378 | 1607 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1608 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1609 | list_del_init(&ses->se_hash); | |
4c649378 | 1610 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1611 | } |
1612 | ||
1da177e4 | 1613 | static void |
4beb345b TM |
1614 | unhash_client(struct nfs4_client *clp) |
1615 | { | |
1616 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1617 | ||
1618 | spin_lock(&nn->client_lock); | |
1619 | unhash_client_locked(clp); | |
1620 | spin_unlock(&nn->client_lock); | |
1621 | } | |
1622 | ||
97403d95 JL |
1623 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1624 | { | |
1625 | if (atomic_read(&clp->cl_refcount)) | |
1626 | return nfserr_jukebox; | |
1627 | unhash_client_locked(clp); | |
1628 | return nfs_ok; | |
1629 | } | |
1630 | ||
4beb345b TM |
1631 | static void |
1632 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1633 | { |
fe0750e5 | 1634 | struct nfs4_openowner *oo; |
1da177e4 | 1635 | struct nfs4_delegation *dp; |
1da177e4 LT |
1636 | struct list_head reaplist; |
1637 | ||
1da177e4 | 1638 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1639 | spin_lock(&state_lock); |
ea1da636 N |
1640 | while (!list_empty(&clp->cl_delegations)) { |
1641 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1642 | unhash_delegation_locked(dp); |
1643 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1644 | } |
cdc97505 | 1645 | spin_unlock(&state_lock); |
1da177e4 LT |
1646 | while (!list_empty(&reaplist)) { |
1647 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1648 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1649 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1650 | } |
2d4a532d | 1651 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1652 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1653 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1654 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1655 | } |
ea1da636 | 1656 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1657 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1658 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1659 | release_openowner(oo); |
1da177e4 | 1660 | } |
6ff8da08 | 1661 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1662 | if (clp->cl_cb_conn.cb_xprt) |
1663 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1664 | free_client(clp); |
1da177e4 LT |
1665 | } |
1666 | ||
4beb345b TM |
1667 | static void |
1668 | destroy_client(struct nfs4_client *clp) | |
1669 | { | |
1670 | unhash_client(clp); | |
1671 | __destroy_client(clp); | |
1672 | } | |
1673 | ||
0d22f68f BF |
1674 | static void expire_client(struct nfs4_client *clp) |
1675 | { | |
4beb345b | 1676 | unhash_client(clp); |
0d22f68f | 1677 | nfsd4_client_record_remove(clp); |
4beb345b | 1678 | __destroy_client(clp); |
0d22f68f BF |
1679 | } |
1680 | ||
35bba9a3 BF |
1681 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1682 | { | |
1683 | memcpy(target->cl_verifier.data, source->data, | |
1684 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1685 | } |
1686 | ||
35bba9a3 BF |
1687 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1688 | { | |
1da177e4 LT |
1689 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1690 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1691 | } | |
1692 | ||
03a4e1f6 | 1693 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1694 | { |
03a4e1f6 BF |
1695 | if (source->cr_principal) { |
1696 | target->cr_principal = | |
1697 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1698 | if (target->cr_principal == NULL) | |
1699 | return -ENOMEM; | |
1700 | } else | |
1701 | target->cr_principal = NULL; | |
d5497fc6 | 1702 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1703 | target->cr_uid = source->cr_uid; |
1704 | target->cr_gid = source->cr_gid; | |
1705 | target->cr_group_info = source->cr_group_info; | |
1706 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1707 | target->cr_gss_mech = source->cr_gss_mech; |
1708 | if (source->cr_gss_mech) | |
1709 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1710 | return 0; |
1da177e4 LT |
1711 | } |
1712 | ||
ac55fdc4 JL |
1713 | static long long |
1714 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1715 | { | |
1716 | long long res; | |
1717 | ||
1718 | res = o1->len - o2->len; | |
1719 | if (res) | |
1720 | return res; | |
1721 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1722 | } | |
1723 | ||
35bba9a3 | 1724 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1725 | { |
a55370a3 | 1726 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1727 | } |
1728 | ||
1729 | static int | |
599e0a22 BF |
1730 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1731 | { | |
1732 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1733 | } |
1734 | ||
1735 | static int | |
599e0a22 BF |
1736 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1737 | { | |
1738 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1739 | } |
1740 | ||
8fbba96e BF |
1741 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1742 | { | |
1743 | int i; | |
1744 | ||
1745 | if (g1->ngroups != g2->ngroups) | |
1746 | return false; | |
1747 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1748 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1749 | return false; |
1750 | return true; | |
1751 | } | |
1752 | ||
68eb3508 BF |
1753 | /* |
1754 | * RFC 3530 language requires clid_inuse be returned when the | |
1755 | * "principal" associated with a requests differs from that previously | |
1756 | * used. We use uid, gid's, and gss principal string as our best | |
1757 | * approximation. We also don't want to allow non-gss use of a client | |
1758 | * established using gss: in theory cr_principal should catch that | |
1759 | * change, but in practice cr_principal can be null even in the gss case | |
1760 | * since gssd doesn't always pass down a principal string. | |
1761 | */ | |
1762 | static bool is_gss_cred(struct svc_cred *cr) | |
1763 | { | |
1764 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1765 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1766 | } | |
1767 | ||
1768 | ||
5559b50a | 1769 | static bool |
599e0a22 BF |
1770 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1771 | { | |
68eb3508 | 1772 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1773 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1774 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1775 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1776 | return false; | |
1777 | if (cr1->cr_principal == cr2->cr_principal) | |
1778 | return true; | |
1779 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1780 | return false; | |
5559b50a | 1781 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1782 | } |
1783 | ||
57266a6e BF |
1784 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1785 | { | |
1786 | struct svc_cred *cr = &rqstp->rq_cred; | |
1787 | u32 service; | |
1788 | ||
c4720591 BF |
1789 | if (!cr->cr_gss_mech) |
1790 | return false; | |
57266a6e BF |
1791 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1792 | return service == RPC_GSS_SVC_INTEGRITY || | |
1793 | service == RPC_GSS_SVC_PRIVACY; | |
1794 | } | |
1795 | ||
1796 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1797 | { | |
1798 | struct svc_cred *cr = &rqstp->rq_cred; | |
1799 | ||
1800 | if (!cl->cl_mach_cred) | |
1801 | return true; | |
1802 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1803 | return false; | |
1804 | if (!svc_rqst_integrity_protected(rqstp)) | |
1805 | return false; | |
1806 | if (!cr->cr_principal) | |
1807 | return false; | |
1808 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1809 | } | |
1810 | ||
c212cecf | 1811 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1812 | { |
1813 | static u32 current_clientid = 1; | |
1814 | ||
2c142baa | 1815 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1816 | clp->cl_clientid.cl_id = current_clientid++; |
1817 | } | |
1818 | ||
deda2faa BF |
1819 | static void gen_confirm(struct nfs4_client *clp) |
1820 | { | |
ab4684d1 | 1821 | __be32 verf[2]; |
deda2faa | 1822 | static u32 i; |
1da177e4 | 1823 | |
f419992c JL |
1824 | /* |
1825 | * This is opaque to client, so no need to byte-swap. Use | |
1826 | * __force to keep sparse happy | |
1827 | */ | |
1828 | verf[0] = (__force __be32)get_seconds(); | |
1829 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1830 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1831 | } |
1832 | ||
4770d722 JL |
1833 | static struct nfs4_stid * |
1834 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1835 | { |
3abdb607 BF |
1836 | struct nfs4_stid *ret; |
1837 | ||
1838 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1839 | if (!ret || !ret->sc_type) | |
1840 | return NULL; | |
1841 | return ret; | |
4d71ab87 BF |
1842 | } |
1843 | ||
4770d722 JL |
1844 | static struct nfs4_stid * |
1845 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1846 | { |
1847 | struct nfs4_stid *s; | |
4d71ab87 | 1848 | |
4770d722 JL |
1849 | spin_lock(&cl->cl_lock); |
1850 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1851 | if (s != NULL) { |
1852 | if (typemask & s->sc_type) | |
1853 | atomic_inc(&s->sc_count); | |
1854 | else | |
1855 | s = NULL; | |
1856 | } | |
4770d722 JL |
1857 | spin_unlock(&cl->cl_lock); |
1858 | return s; | |
4581d140 BF |
1859 | } |
1860 | ||
2216d449 | 1861 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1862 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1863 | { | |
1864 | struct nfs4_client *clp; | |
1865 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1866 | int ret; |
c212cecf | 1867 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1868 | |
1869 | clp = alloc_client(name); | |
1870 | if (clp == NULL) | |
1871 | return NULL; | |
1872 | ||
03a4e1f6 BF |
1873 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1874 | if (ret) { | |
03a4e1f6 | 1875 | free_client(clp); |
03a4e1f6 | 1876 | return NULL; |
b09333c4 | 1877 | } |
02e1215f | 1878 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1879 | clp->cl_time = get_seconds(); |
b09333c4 | 1880 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1881 | copy_verf(clp, verf); |
1882 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1883 | gen_confirm(clp); |
edd76786 | 1884 | clp->cl_cb_session = NULL; |
c212cecf | 1885 | clp->net = net; |
b09333c4 RL |
1886 | return clp; |
1887 | } | |
1888 | ||
fd39ca9a | 1889 | static void |
ac55fdc4 JL |
1890 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1891 | { | |
1892 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1893 | struct nfs4_client *clp; | |
1894 | ||
1895 | while (*new) { | |
1896 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1897 | parent = *new; | |
1898 | ||
1899 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1900 | new = &((*new)->rb_left); | |
1901 | else | |
1902 | new = &((*new)->rb_right); | |
1903 | } | |
1904 | ||
1905 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1906 | rb_insert_color(&new_clp->cl_namenode, root); | |
1907 | } | |
1908 | ||
1909 | static struct nfs4_client * | |
1910 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1911 | { | |
1912 | long long cmp; | |
1913 | struct rb_node *node = root->rb_node; | |
1914 | struct nfs4_client *clp; | |
1915 | ||
1916 | while (node) { | |
1917 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1918 | cmp = compare_blob(&clp->cl_name, name); | |
1919 | if (cmp > 0) | |
1920 | node = node->rb_left; | |
1921 | else if (cmp < 0) | |
1922 | node = node->rb_right; | |
1923 | else | |
1924 | return clp; | |
1925 | } | |
1926 | return NULL; | |
1927 | } | |
1928 | ||
1929 | static void | |
1930 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1931 | { |
1932 | unsigned int idhashval; | |
0a7ec377 | 1933 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1934 | |
0a880a28 TM |
1935 | lockdep_assert_held(&nn->client_lock); |
1936 | ||
ac55fdc4 | 1937 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1938 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1939 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1940 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 1941 | renew_client_locked(clp); |
1da177e4 LT |
1942 | } |
1943 | ||
fd39ca9a | 1944 | static void |
1da177e4 LT |
1945 | move_to_confirmed(struct nfs4_client *clp) |
1946 | { | |
1947 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1948 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1949 | |
0a880a28 TM |
1950 | lockdep_assert_held(&nn->client_lock); |
1951 | ||
1da177e4 | 1952 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 1953 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1954 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1955 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1956 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 1957 | renew_client_locked(clp); |
1da177e4 LT |
1958 | } |
1959 | ||
1960 | static struct nfs4_client * | |
bfa85e83 | 1961 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1962 | { |
1963 | struct nfs4_client *clp; | |
1964 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1965 | ||
bfa85e83 | 1966 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1967 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1968 | if ((bool)clp->cl_minorversion != sessions) |
1969 | return NULL; | |
3dbacee6 | 1970 | renew_client_locked(clp); |
1da177e4 | 1971 | return clp; |
a50d2ad1 | 1972 | } |
1da177e4 LT |
1973 | } |
1974 | return NULL; | |
1975 | } | |
1976 | ||
bfa85e83 BF |
1977 | static struct nfs4_client * |
1978 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1979 | { | |
1980 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1981 | ||
0a880a28 | 1982 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
1983 | return find_client_in_id_table(tbl, clid, sessions); |
1984 | } | |
1985 | ||
1da177e4 | 1986 | static struct nfs4_client * |
0a7ec377 | 1987 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1988 | { |
bfa85e83 | 1989 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1990 | |
0a880a28 | 1991 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 1992 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1993 | } |
1994 | ||
6e5f15c9 | 1995 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1996 | { |
6e5f15c9 | 1997 | return clp->cl_exchange_flags != 0; |
e203d506 | 1998 | } |
a1bcecd2 | 1999 | |
28ce6054 | 2000 | static struct nfs4_client * |
382a62e7 | 2001 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2002 | { |
0a880a28 | 2003 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2004 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2005 | } |
2006 | ||
2007 | static struct nfs4_client * | |
a99454aa | 2008 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2009 | { |
0a880a28 | 2010 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2011 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2012 | } |
2013 | ||
fd39ca9a | 2014 | static void |
6f3d772f | 2015 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2016 | { |
07263f1e | 2017 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2018 | struct sockaddr *sa = svc_addr(rqstp); |
2019 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2020 | unsigned short expected_family; |
2021 | ||
2022 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2023 | if (se->se_callback_netid_len == 3 && | |
2024 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2025 | expected_family = AF_INET; | |
2026 | else if (se->se_callback_netid_len == 4 && | |
2027 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2028 | expected_family = AF_INET6; | |
2029 | else | |
1da177e4 LT |
2030 | goto out_err; |
2031 | ||
c212cecf | 2032 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2033 | se->se_callback_addr_len, |
07263f1e BF |
2034 | (struct sockaddr *)&conn->cb_addr, |
2035 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2036 | |
07263f1e | 2037 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2038 | goto out_err; |
aa9a4ec7 | 2039 | |
07263f1e BF |
2040 | if (conn->cb_addr.ss_family == AF_INET6) |
2041 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2042 | |
07263f1e BF |
2043 | conn->cb_prog = se->se_callback_prog; |
2044 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2045 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2046 | return; |
2047 | out_err: | |
07263f1e BF |
2048 | conn->cb_addr.ss_family = AF_UNSPEC; |
2049 | conn->cb_addrlen = 0; | |
849823c5 | 2050 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2051 | "will not receive delegations\n", |
2052 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2053 | ||
1da177e4 LT |
2054 | return; |
2055 | } | |
2056 | ||
074fe897 | 2057 | /* |
067e1ace | 2058 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2059 | */ |
b607664e | 2060 | static void |
074fe897 | 2061 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2062 | { |
f5236013 | 2063 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2064 | struct nfsd4_slot *slot = resp->cstate.slot; |
2065 | unsigned int base; | |
074fe897 | 2066 | |
557ce264 | 2067 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2068 | |
557ce264 AA |
2069 | slot->sl_opcnt = resp->opcnt; |
2070 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2071 | |
bf5c43c8 | 2072 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2073 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2074 | slot->sl_datalen = 0; |
bf864a31 | 2075 | return; |
074fe897 | 2076 | } |
f5236013 BF |
2077 | base = resp->cstate.data_offset; |
2078 | slot->sl_datalen = buf->len - base; | |
2079 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2080 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2081 | return; | |
074fe897 AA |
2082 | } |
2083 | ||
2084 | /* | |
abfabf8c AA |
2085 | * Encode the replay sequence operation from the slot values. |
2086 | * If cachethis is FALSE encode the uncached rep error on the next | |
2087 | * operation which sets resp->p and increments resp->opcnt for | |
2088 | * nfs4svc_encode_compoundres. | |
074fe897 | 2089 | * |
074fe897 | 2090 | */ |
abfabf8c AA |
2091 | static __be32 |
2092 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2093 | struct nfsd4_compoundres *resp) | |
074fe897 | 2094 | { |
abfabf8c AA |
2095 | struct nfsd4_op *op; |
2096 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2097 | |
abfabf8c AA |
2098 | /* Encode the replayed sequence operation */ |
2099 | op = &args->ops[resp->opcnt - 1]; | |
2100 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2101 | |
abfabf8c | 2102 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2103 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2104 | op = &args->ops[resp->opcnt++]; |
2105 | op->status = nfserr_retry_uncached_rep; | |
2106 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2107 | } |
abfabf8c | 2108 | return op->status; |
074fe897 AA |
2109 | } |
2110 | ||
2111 | /* | |
557ce264 AA |
2112 | * The sequence operation is not cached because we can use the slot and |
2113 | * session values. | |
074fe897 | 2114 | */ |
3ca2eb98 | 2115 | static __be32 |
bf864a31 AA |
2116 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2117 | struct nfsd4_sequence *seq) | |
074fe897 | 2118 | { |
557ce264 | 2119 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2120 | struct xdr_stream *xdr = &resp->xdr; |
2121 | __be32 *p; | |
074fe897 AA |
2122 | __be32 status; |
2123 | ||
557ce264 | 2124 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2125 | |
abfabf8c | 2126 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2127 | if (status) |
abfabf8c | 2128 | return status; |
074fe897 | 2129 | |
f5236013 BF |
2130 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2131 | if (!p) { | |
2132 | WARN_ON_ONCE(1); | |
2133 | return nfserr_serverfault; | |
2134 | } | |
2135 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2136 | xdr_commit_encode(xdr); | |
074fe897 | 2137 | |
557ce264 | 2138 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2139 | return slot->sl_status; |
074fe897 AA |
2140 | } |
2141 | ||
0733d213 AA |
2142 | /* |
2143 | * Set the exchange_id flags returned by the server. | |
2144 | */ | |
2145 | static void | |
2146 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2147 | { | |
2148 | /* pNFS is not supported */ | |
2149 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2150 | ||
2151 | /* Referrals are supported, Migration is not. */ | |
2152 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2153 | ||
2154 | /* set the wire flags to return to client. */ | |
2155 | clid->flags = new->cl_exchange_flags; | |
2156 | } | |
2157 | ||
631fc9ea BF |
2158 | static bool client_has_state(struct nfs4_client *clp) |
2159 | { | |
2160 | /* | |
2161 | * Note clp->cl_openowners check isn't quite right: there's no | |
2162 | * need to count owners without stateid's. | |
2163 | * | |
2164 | * Also note we should probably be using this in 4.0 case too. | |
2165 | */ | |
6eccece9 BF |
2166 | return !list_empty(&clp->cl_openowners) |
2167 | || !list_empty(&clp->cl_delegations) | |
2168 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2169 | } |
2170 | ||
069b6ad4 AA |
2171 | __be32 |
2172 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2173 | struct nfsd4_compound_state *cstate, | |
2174 | struct nfsd4_exchange_id *exid) | |
2175 | { | |
3dbacee6 TM |
2176 | struct nfs4_client *conf, *new; |
2177 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2178 | __be32 status; |
363168b4 | 2179 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2180 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2181 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2182 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2183 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2184 | |
363168b4 | 2185 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2186 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2187 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2188 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2189 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2190 | |
a084daf5 | 2191 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2192 | return nfserr_inval; |
2193 | ||
0733d213 | 2194 | switch (exid->spa_how) { |
57266a6e BF |
2195 | case SP4_MACH_CRED: |
2196 | if (!svc_rqst_integrity_protected(rqstp)) | |
2197 | return nfserr_inval; | |
0733d213 AA |
2198 | case SP4_NONE: |
2199 | break; | |
063b0fb9 BF |
2200 | default: /* checked by xdr code */ |
2201 | WARN_ON_ONCE(1); | |
0733d213 | 2202 | case SP4_SSV: |
dd30333c | 2203 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2204 | } |
2205 | ||
5cc40fd7 TM |
2206 | new = create_client(exid->clname, rqstp, &verf); |
2207 | if (new == NULL) | |
2208 | return nfserr_jukebox; | |
2209 | ||
2dbb269d | 2210 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2211 | nfs4_lock_state(); |
3dbacee6 | 2212 | spin_lock(&nn->client_lock); |
382a62e7 | 2213 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2214 | if (conf) { |
83e08fd4 BF |
2215 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2216 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2217 | ||
136e658d BF |
2218 | if (update) { |
2219 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2220 | status = nfserr_inval; |
1a308118 BF |
2221 | goto out; |
2222 | } | |
57266a6e BF |
2223 | if (!mach_creds_match(conf, rqstp)) { |
2224 | status = nfserr_wrong_cred; | |
2225 | goto out; | |
2226 | } | |
136e658d | 2227 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2228 | status = nfserr_perm; |
136e658d BF |
2229 | goto out; |
2230 | } | |
2231 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2232 | status = nfserr_not_same; |
2233 | goto out; | |
2234 | } | |
136e658d BF |
2235 | /* case 6 */ |
2236 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2237 | goto out_copy; |
0733d213 | 2238 | } |
136e658d | 2239 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2240 | if (client_has_state(conf)) { |
2241 | status = nfserr_clid_inuse; | |
0733d213 AA |
2242 | goto out; |
2243 | } | |
0733d213 AA |
2244 | goto out_new; |
2245 | } | |
136e658d | 2246 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2247 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2248 | goto out_copy; |
2249 | } | |
2250 | /* case 5, client reboot */ | |
3dbacee6 | 2251 | conf = NULL; |
136e658d | 2252 | goto out_new; |
6ddbbbfe MS |
2253 | } |
2254 | ||
2dbb269d | 2255 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2256 | status = nfserr_noent; |
2257 | goto out; | |
0733d213 AA |
2258 | } |
2259 | ||
a99454aa | 2260 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2261 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2262 | unhash_client_locked(unconf); |
0733d213 | 2263 | |
2dbb269d | 2264 | /* case 1 (normal case) */ |
0733d213 | 2265 | out_new: |
3dbacee6 TM |
2266 | if (conf) |
2267 | unhash_client_locked(conf); | |
4f540e29 | 2268 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2269 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2270 | |
c212cecf | 2271 | gen_clid(new, nn); |
ac55fdc4 | 2272 | add_to_unconfirmed(new); |
3dbacee6 | 2273 | swap(new, conf); |
0733d213 | 2274 | out_copy: |
5cc40fd7 TM |
2275 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2276 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2277 | |
5cc40fd7 TM |
2278 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2279 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2280 | |
2281 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2282 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2283 | status = nfs_ok; |
2284 | ||
2285 | out: | |
3dbacee6 | 2286 | spin_unlock(&nn->client_lock); |
0733d213 | 2287 | nfs4_unlock_state(); |
5cc40fd7 | 2288 | if (new) |
3dbacee6 TM |
2289 | expire_client(new); |
2290 | if (unconf) | |
2291 | expire_client(unconf); | |
0733d213 | 2292 | return status; |
069b6ad4 AA |
2293 | } |
2294 | ||
57b7b43b | 2295 | static __be32 |
88e588d5 | 2296 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2297 | { |
88e588d5 AA |
2298 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2299 | slot_seqid); | |
b85d4c01 BH |
2300 | |
2301 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2302 | if (slot_inuse) { |
2303 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2304 | return nfserr_jukebox; |
2305 | else | |
2306 | return nfserr_seq_misordered; | |
2307 | } | |
f6d82485 | 2308 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2309 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2310 | return nfs_ok; |
88e588d5 | 2311 | if (seqid == slot_seqid) |
b85d4c01 | 2312 | return nfserr_replay_cache; |
b85d4c01 BH |
2313 | return nfserr_seq_misordered; |
2314 | } | |
2315 | ||
49557cc7 AA |
2316 | /* |
2317 | * Cache the create session result into the create session single DRC | |
2318 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2319 | * Do this for solo or embedded create session operations. | |
2320 | */ | |
2321 | static void | |
2322 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2323 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2324 | { |
2325 | slot->sl_status = nfserr; | |
2326 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2327 | } | |
2328 | ||
2329 | static __be32 | |
2330 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2331 | struct nfsd4_clid_slot *slot) | |
2332 | { | |
2333 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2334 | return slot->sl_status; | |
2335 | } | |
2336 | ||
1b74c25b MJ |
2337 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2338 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2339 | 1 + /* MIN tag is length with zero, only length */ \ | |
2340 | 3 + /* version, opcount, opcode */ \ | |
2341 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2342 | /* seqid, slotID, slotID, cache */ \ | |
2343 | 4 ) * sizeof(__be32)) | |
2344 | ||
2345 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2346 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2347 | 1 + /* status */ \ | |
2348 | 1 + /* MIN tag is length with zero, only length */ \ | |
2349 | 3 + /* opcount, opcode, opstatus*/ \ | |
2350 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2351 | /* seqid, slotID, slotID, slotID, status */ \ | |
2352 | 5 ) * sizeof(__be32)) | |
2353 | ||
55c760cf | 2354 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2355 | { |
55c760cf BF |
2356 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2357 | ||
373cd409 BF |
2358 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2359 | return nfserr_toosmall; | |
2360 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2361 | return nfserr_toosmall; | |
55c760cf BF |
2362 | ca->headerpadsz = 0; |
2363 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2364 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2365 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2366 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2367 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2368 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2369 | /* | |
2370 | * Note decreasing slot size below client's request may make it | |
2371 | * difficult for client to function correctly, whereas | |
2372 | * decreasing the number of slots will (just?) affect | |
2373 | * performance. When short on memory we therefore prefer to | |
2374 | * decrease number of slots instead of their size. Clients that | |
2375 | * request larger slots than they need will get poor results: | |
2376 | */ | |
2377 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2378 | if (!ca->maxreqs) | |
2379 | return nfserr_jukebox; | |
2380 | ||
373cd409 | 2381 | return nfs_ok; |
1b74c25b MJ |
2382 | } |
2383 | ||
8a891633 KM |
2384 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2385 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2386 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2387 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2388 | ||
06b332a5 | 2389 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2390 | { |
06b332a5 BF |
2391 | ca->headerpadsz = 0; |
2392 | ||
2393 | /* | |
2394 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2395 | * don't even do gss on the backchannel yet. But this is still | |
2396 | * less than 1k. Tighten up this estimate in the unlikely event | |
2397 | * it turns out to be a problem for some client: | |
2398 | */ | |
8a891633 | 2399 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2400 | return nfserr_toosmall; |
8a891633 | 2401 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2402 | return nfserr_toosmall; |
2403 | ca->maxresp_cached = 0; | |
2404 | if (ca->maxops < 2) | |
2405 | return nfserr_toosmall; | |
2406 | ||
2407 | return nfs_ok; | |
1b74c25b MJ |
2408 | } |
2409 | ||
b78724b7 BF |
2410 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2411 | { | |
2412 | switch (cbs->flavor) { | |
2413 | case RPC_AUTH_NULL: | |
2414 | case RPC_AUTH_UNIX: | |
2415 | return nfs_ok; | |
2416 | default: | |
2417 | /* | |
2418 | * GSS case: the spec doesn't allow us to return this | |
2419 | * error. But it also doesn't allow us not to support | |
2420 | * GSS. | |
2421 | * I'd rather this fail hard than return some error the | |
2422 | * client might think it can already handle: | |
2423 | */ | |
2424 | return nfserr_encr_alg_unsupp; | |
2425 | } | |
2426 | } | |
2427 | ||
069b6ad4 AA |
2428 | __be32 |
2429 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2430 | struct nfsd4_compound_state *cstate, | |
2431 | struct nfsd4_create_session *cr_ses) | |
2432 | { | |
363168b4 | 2433 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2434 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2435 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2436 | struct nfsd4_session *new; |
81f0b2a4 | 2437 | struct nfsd4_conn *conn; |
49557cc7 | 2438 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2439 | __be32 status = 0; |
8daae4dc | 2440 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2441 | |
a62573dc MJ |
2442 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2443 | return nfserr_inval; | |
b78724b7 BF |
2444 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2445 | if (status) | |
2446 | return status; | |
55c760cf | 2447 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2448 | if (status) |
2449 | return status; | |
2450 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2451 | if (status) |
f403e450 | 2452 | goto out_release_drc_mem; |
81f0b2a4 | 2453 | status = nfserr_jukebox; |
60810e54 | 2454 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2455 | if (!new) |
2456 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2457 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2458 | if (!conn) | |
2459 | goto out_free_session; | |
a62573dc | 2460 | |
ec6b5d7b | 2461 | nfs4_lock_state(); |
d20c11d8 | 2462 | spin_lock(&nn->client_lock); |
0a7ec377 | 2463 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2464 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2465 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2466 | |
2467 | if (conf) { | |
57266a6e BF |
2468 | status = nfserr_wrong_cred; |
2469 | if (!mach_creds_match(conf, rqstp)) | |
2470 | goto out_free_conn; | |
49557cc7 AA |
2471 | cs_slot = &conf->cl_cs_slot; |
2472 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2473 | if (status == nfserr_replay_cache) { |
49557cc7 | 2474 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2475 | goto out_free_conn; |
49557cc7 | 2476 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2477 | status = nfserr_seq_misordered; |
81f0b2a4 | 2478 | goto out_free_conn; |
ec6b5d7b | 2479 | } |
ec6b5d7b AA |
2480 | } else if (unconf) { |
2481 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2482 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2483 | status = nfserr_clid_inuse; |
81f0b2a4 | 2484 | goto out_free_conn; |
ec6b5d7b | 2485 | } |
57266a6e BF |
2486 | status = nfserr_wrong_cred; |
2487 | if (!mach_creds_match(unconf, rqstp)) | |
2488 | goto out_free_conn; | |
49557cc7 AA |
2489 | cs_slot = &unconf->cl_cs_slot; |
2490 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2491 | if (status) { |
2492 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2493 | status = nfserr_seq_misordered; |
81f0b2a4 | 2494 | goto out_free_conn; |
ec6b5d7b | 2495 | } |
382a62e7 | 2496 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2497 | if (old) { |
d20c11d8 | 2498 | status = mark_client_expired_locked(old); |
221a6876 BF |
2499 | if (status) |
2500 | goto out_free_conn; | |
221a6876 | 2501 | } |
8f9d3d3b | 2502 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2503 | conf = unconf; |
2504 | } else { | |
2505 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2506 | goto out_free_conn; |
ec6b5d7b | 2507 | } |
81f0b2a4 | 2508 | status = nfs_ok; |
408b79bc BF |
2509 | /* |
2510 | * We do not support RDMA or persistent sessions | |
2511 | */ | |
2512 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2513 | cr_ses->flags &= ~SESSION4_RDMA; | |
2514 | ||
81f0b2a4 | 2515 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2516 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2517 | |
ac7c46f2 | 2518 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2519 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2520 | cs_slot->sl_seqid++; |
49557cc7 | 2521 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2522 | |
d20c11d8 | 2523 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2524 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2525 | spin_unlock(&nn->client_lock); |
2526 | /* init connection and backchannel */ | |
2527 | nfsd4_init_conn(rqstp, conn, new); | |
2528 | nfsd4_put_session(new); | |
ec6b5d7b | 2529 | nfs4_unlock_state(); |
d20c11d8 JL |
2530 | if (old) |
2531 | expire_client(old); | |
ec6b5d7b | 2532 | return status; |
81f0b2a4 | 2533 | out_free_conn: |
d20c11d8 | 2534 | spin_unlock(&nn->client_lock); |
266533c6 | 2535 | nfs4_unlock_state(); |
81f0b2a4 | 2536 | free_conn(conn); |
d20c11d8 JL |
2537 | if (old) |
2538 | expire_client(old); | |
81f0b2a4 BF |
2539 | out_free_session: |
2540 | __free_session(new); | |
55c760cf BF |
2541 | out_release_drc_mem: |
2542 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2543 | return status; |
069b6ad4 AA |
2544 | } |
2545 | ||
1d1bc8f2 BF |
2546 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2547 | { | |
2548 | switch (*dir) { | |
2549 | case NFS4_CDFC4_FORE: | |
2550 | case NFS4_CDFC4_BACK: | |
2551 | return nfs_ok; | |
2552 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2553 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2554 | *dir = NFS4_CDFC4_BOTH; | |
2555 | return nfs_ok; | |
2556 | }; | |
2557 | return nfserr_inval; | |
2558 | } | |
2559 | ||
cb73a9f4 BF |
2560 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2561 | { | |
2562 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2563 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2564 | __be32 status; |
cb73a9f4 | 2565 | |
b78724b7 BF |
2566 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2567 | if (status) | |
2568 | return status; | |
c9a49628 | 2569 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2570 | session->se_cb_prog = bc->bc_cb_program; |
2571 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2572 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2573 | |
2574 | nfsd4_probe_callback(session->se_client); | |
2575 | ||
2576 | return nfs_ok; | |
2577 | } | |
2578 | ||
1d1bc8f2 BF |
2579 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2580 | struct nfsd4_compound_state *cstate, | |
2581 | struct nfsd4_bind_conn_to_session *bcts) | |
2582 | { | |
2583 | __be32 status; | |
3ba63671 | 2584 | struct nfsd4_conn *conn; |
4f6e6c17 | 2585 | struct nfsd4_session *session; |
d4e19e70 TM |
2586 | struct net *net = SVC_NET(rqstp); |
2587 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2588 | |
2589 | if (!nfsd4_last_compound_op(rqstp)) | |
2590 | return nfserr_not_only_op; | |
4f6e6c17 | 2591 | nfs4_lock_state(); |
c9a49628 | 2592 | spin_lock(&nn->client_lock); |
d4e19e70 | 2593 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2594 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2595 | if (!session) |
d4e19e70 | 2596 | goto out_no_session; |
57266a6e BF |
2597 | status = nfserr_wrong_cred; |
2598 | if (!mach_creds_match(session->se_client, rqstp)) | |
2599 | goto out; | |
1d1bc8f2 | 2600 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2601 | if (status) |
4f6e6c17 | 2602 | goto out; |
3ba63671 | 2603 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2604 | status = nfserr_jukebox; |
3ba63671 | 2605 | if (!conn) |
4f6e6c17 BF |
2606 | goto out; |
2607 | nfsd4_init_conn(rqstp, conn, session); | |
2608 | status = nfs_ok; | |
2609 | out: | |
d4e19e70 TM |
2610 | nfsd4_put_session(session); |
2611 | out_no_session: | |
4f6e6c17 BF |
2612 | nfs4_unlock_state(); |
2613 | return status; | |
1d1bc8f2 BF |
2614 | } |
2615 | ||
5d4cec2f BF |
2616 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2617 | { | |
2618 | if (!session) | |
2619 | return 0; | |
2620 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2621 | } | |
2622 | ||
069b6ad4 AA |
2623 | __be32 |
2624 | nfsd4_destroy_session(struct svc_rqst *r, | |
2625 | struct nfsd4_compound_state *cstate, | |
2626 | struct nfsd4_destroy_session *sessionid) | |
2627 | { | |
e10e0cfc | 2628 | struct nfsd4_session *ses; |
abcdff09 | 2629 | __be32 status; |
f0f51f5c | 2630 | int ref_held_by_me = 0; |
d4e19e70 TM |
2631 | struct net *net = SVC_NET(r); |
2632 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2633 | |
abcdff09 BF |
2634 | nfs4_lock_state(); |
2635 | status = nfserr_not_only_op; | |
5d4cec2f | 2636 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2637 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2638 | goto out; |
f0f51f5c | 2639 | ref_held_by_me++; |
57716355 | 2640 | } |
e10e0cfc | 2641 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2642 | spin_lock(&nn->client_lock); |
d4e19e70 | 2643 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2644 | if (!ses) |
2645 | goto out_client_lock; | |
57266a6e BF |
2646 | status = nfserr_wrong_cred; |
2647 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2648 | goto out_put_session; |
f0f51f5c | 2649 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2650 | if (status) |
f0f51f5c | 2651 | goto out_put_session; |
e10e0cfc | 2652 | unhash_session(ses); |
c9a49628 | 2653 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2654 | |
84f5f7cc | 2655 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2656 | |
c9a49628 | 2657 | spin_lock(&nn->client_lock); |
e10e0cfc | 2658 | status = nfs_ok; |
f0f51f5c | 2659 | out_put_session: |
d4e19e70 | 2660 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2661 | out_client_lock: |
2662 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2663 | out: |
abcdff09 | 2664 | nfs4_unlock_state(); |
e10e0cfc | 2665 | return status; |
069b6ad4 AA |
2666 | } |
2667 | ||
a663bdd8 | 2668 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2669 | { |
2670 | struct nfsd4_conn *c; | |
2671 | ||
2672 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2673 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2674 | return c; |
2675 | } | |
2676 | } | |
2677 | return NULL; | |
2678 | } | |
2679 | ||
57266a6e | 2680 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2681 | { |
2682 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2683 | struct nfsd4_conn *c; |
57266a6e | 2684 | __be32 status = nfs_ok; |
21b75b01 | 2685 | int ret; |
328ead28 BF |
2686 | |
2687 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2688 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2689 | if (c) |
2690 | goto out_free; | |
2691 | status = nfserr_conn_not_bound_to_session; | |
2692 | if (clp->cl_mach_cred) | |
2693 | goto out_free; | |
328ead28 BF |
2694 | __nfsd4_hash_conn(new, ses); |
2695 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2696 | ret = nfsd4_register_conn(new); |
2697 | if (ret) | |
2698 | /* oops; xprt is already down: */ | |
2699 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2700 | return nfs_ok; |
2701 | out_free: | |
2702 | spin_unlock(&clp->cl_lock); | |
2703 | free_conn(new); | |
2704 | return status; | |
328ead28 BF |
2705 | } |
2706 | ||
868b89c3 MJ |
2707 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2708 | { | |
2709 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2710 | ||
2711 | return args->opcnt > session->se_fchannel.maxops; | |
2712 | } | |
2713 | ||
ae82a8d0 MJ |
2714 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2715 | struct nfsd4_session *session) | |
2716 | { | |
2717 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2718 | ||
2719 | return xb->len > session->se_fchannel.maxreq_sz; | |
2720 | } | |
2721 | ||
069b6ad4 | 2722 | __be32 |
b85d4c01 | 2723 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2724 | struct nfsd4_compound_state *cstate, |
2725 | struct nfsd4_sequence *seq) | |
2726 | { | |
f9bb94c4 | 2727 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2728 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2729 | struct nfsd4_session *session; |
221a6876 | 2730 | struct nfs4_client *clp; |
b85d4c01 | 2731 | struct nfsd4_slot *slot; |
a663bdd8 | 2732 | struct nfsd4_conn *conn; |
57b7b43b | 2733 | __be32 status; |
47ee5298 | 2734 | int buflen; |
d4e19e70 TM |
2735 | struct net *net = SVC_NET(rqstp); |
2736 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2737 | |
f9bb94c4 AA |
2738 | if (resp->opcnt != 1) |
2739 | return nfserr_sequence_pos; | |
2740 | ||
a663bdd8 BF |
2741 | /* |
2742 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2743 | * below. | |
2744 | */ | |
2745 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2746 | if (!conn) | |
2747 | return nfserr_jukebox; | |
2748 | ||
c9a49628 | 2749 | spin_lock(&nn->client_lock); |
d4e19e70 | 2750 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2751 | if (!session) |
221a6876 BF |
2752 | goto out_no_session; |
2753 | clp = session->se_client; | |
b85d4c01 | 2754 | |
868b89c3 MJ |
2755 | status = nfserr_too_many_ops; |
2756 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2757 | goto out_put_session; |
868b89c3 | 2758 | |
ae82a8d0 MJ |
2759 | status = nfserr_req_too_big; |
2760 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2761 | goto out_put_session; |
ae82a8d0 | 2762 | |
b85d4c01 | 2763 | status = nfserr_badslot; |
6c18ba9f | 2764 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2765 | goto out_put_session; |
b85d4c01 | 2766 | |
557ce264 | 2767 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2768 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2769 | ||
a8dfdaeb AA |
2770 | /* We do not negotiate the number of slots yet, so set the |
2771 | * maxslots to the session maxreqs which is used to encode | |
2772 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2773 | seq->maxslots = session->se_fchannel.maxreqs; | |
2774 | ||
73e79482 BF |
2775 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2776 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2777 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2778 | status = nfserr_seq_misordered; |
2779 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2780 | goto out_put_session; |
b85d4c01 BH |
2781 | cstate->slot = slot; |
2782 | cstate->session = session; | |
4b24ca7d | 2783 | cstate->clp = clp; |
da3846a2 | 2784 | /* Return the cached reply status and set cstate->status |
557ce264 | 2785 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2786 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2787 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2788 | goto out; |
b85d4c01 BH |
2789 | } |
2790 | if (status) | |
66b2b9b2 | 2791 | goto out_put_session; |
b85d4c01 | 2792 | |
57266a6e | 2793 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2794 | conn = NULL; |
57266a6e BF |
2795 | if (status) |
2796 | goto out_put_session; | |
328ead28 | 2797 | |
47ee5298 BF |
2798 | buflen = (seq->cachethis) ? |
2799 | session->se_fchannel.maxresp_cached : | |
2800 | session->se_fchannel.maxresp_sz; | |
2801 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2802 | nfserr_rep_too_big; | |
a5cddc88 | 2803 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2804 | goto out_put_session; |
32aaa62e | 2805 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2806 | |
2807 | status = nfs_ok; | |
b85d4c01 | 2808 | /* Success! bump slot seqid */ |
b85d4c01 | 2809 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2810 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2811 | if (seq->cachethis) |
2812 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2813 | else |
2814 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2815 | |
2816 | cstate->slot = slot; | |
2817 | cstate->session = session; | |
4b24ca7d | 2818 | cstate->clp = clp; |
b85d4c01 | 2819 | |
b85d4c01 | 2820 | out: |
221a6876 BF |
2821 | switch (clp->cl_cb_state) { |
2822 | case NFSD4_CB_DOWN: | |
2823 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2824 | break; | |
2825 | case NFSD4_CB_FAULT: | |
2826 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2827 | break; | |
2828 | default: | |
2829 | seq->status_flags = 0; | |
aaf84eb9 | 2830 | } |
3bd64a5b BF |
2831 | if (!list_empty(&clp->cl_revoked)) |
2832 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2833 | out_no_session: |
3f42d2c4 KM |
2834 | if (conn) |
2835 | free_conn(conn); | |
c9a49628 | 2836 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2837 | return status; |
66b2b9b2 | 2838 | out_put_session: |
d4e19e70 | 2839 | nfsd4_put_session_locked(session); |
221a6876 | 2840 | goto out_no_session; |
069b6ad4 AA |
2841 | } |
2842 | ||
b607664e TM |
2843 | void |
2844 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2845 | { | |
2846 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2847 | ||
2848 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2849 | if (cs->status != nfserr_replay_cache) { |
2850 | nfsd4_store_cache_entry(resp); | |
2851 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2852 | } | |
d4e19e70 | 2853 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2854 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2855 | } else if (cs->clp) |
2856 | put_client_renew(cs->clp); | |
b607664e TM |
2857 | } |
2858 | ||
345c2842 MJ |
2859 | __be32 |
2860 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2861 | { | |
6b10ad19 TM |
2862 | struct nfs4_client *conf, *unconf; |
2863 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2864 | __be32 status = 0; |
8daae4dc | 2865 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2866 | |
2867 | nfs4_lock_state(); | |
6b10ad19 | 2868 | spin_lock(&nn->client_lock); |
0a7ec377 | 2869 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2870 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2871 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2872 | |
2873 | if (conf) { | |
c0293b01 | 2874 | if (client_has_state(conf)) { |
345c2842 MJ |
2875 | status = nfserr_clientid_busy; |
2876 | goto out; | |
2877 | } | |
6b10ad19 | 2878 | clp = conf; |
345c2842 MJ |
2879 | } else if (unconf) |
2880 | clp = unconf; | |
2881 | else { | |
2882 | status = nfserr_stale_clientid; | |
2883 | goto out; | |
2884 | } | |
57266a6e | 2885 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2886 | clp = NULL; |
57266a6e BF |
2887 | status = nfserr_wrong_cred; |
2888 | goto out; | |
2889 | } | |
6b10ad19 | 2890 | unhash_client_locked(clp); |
345c2842 | 2891 | out: |
6b10ad19 | 2892 | spin_unlock(&nn->client_lock); |
345c2842 | 2893 | nfs4_unlock_state(); |
6b10ad19 TM |
2894 | if (clp) |
2895 | expire_client(clp); | |
345c2842 MJ |
2896 | return status; |
2897 | } | |
2898 | ||
4dc6ec00 BF |
2899 | __be32 |
2900 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2901 | { | |
57b7b43b | 2902 | __be32 status = 0; |
bcecf1cc | 2903 | |
4dc6ec00 BF |
2904 | if (rc->rca_one_fs) { |
2905 | if (!cstate->current_fh.fh_dentry) | |
2906 | return nfserr_nofilehandle; | |
2907 | /* | |
2908 | * We don't take advantage of the rca_one_fs case. | |
2909 | * That's OK, it's optional, we can safely ignore it. | |
2910 | */ | |
2911 | return nfs_ok; | |
2912 | } | |
bcecf1cc | 2913 | |
4dc6ec00 | 2914 | nfs4_lock_state(); |
bcecf1cc | 2915 | status = nfserr_complete_already; |
a52d726b JL |
2916 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2917 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2918 | goto out; |
2919 | ||
2920 | status = nfserr_stale_clientid; | |
2921 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2922 | /* |
2923 | * The following error isn't really legal. | |
2924 | * But we only get here if the client just explicitly | |
2925 | * destroyed the client. Surely it no longer cares what | |
2926 | * error it gets back on an operation for the dead | |
2927 | * client. | |
2928 | */ | |
bcecf1cc MJ |
2929 | goto out; |
2930 | ||
2931 | status = nfs_ok; | |
2a4317c5 | 2932 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2933 | out: |
4dc6ec00 | 2934 | nfs4_unlock_state(); |
bcecf1cc | 2935 | return status; |
4dc6ec00 BF |
2936 | } |
2937 | ||
b37ad28b | 2938 | __be32 |
b591480b BF |
2939 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2940 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2941 | { |
a084daf5 | 2942 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2943 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
2944 | struct nfs4_client *conf, *new; |
2945 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 2946 | __be32 status; |
c212cecf SK |
2947 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2948 | ||
5cc40fd7 TM |
2949 | new = create_client(clname, rqstp, &clverifier); |
2950 | if (new == NULL) | |
2951 | return nfserr_jukebox; | |
63db4632 | 2952 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2953 | nfs4_lock_state(); |
3dbacee6 | 2954 | spin_lock(&nn->client_lock); |
382a62e7 | 2955 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2956 | if (conf) { |
63db4632 | 2957 | /* case 0: */ |
1da177e4 | 2958 | status = nfserr_clid_inuse; |
e203d506 BF |
2959 | if (clp_used_exchangeid(conf)) |
2960 | goto out; | |
026722c2 | 2961 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2962 | char addr_str[INET6_ADDRSTRLEN]; |
2963 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2964 | sizeof(addr_str)); | |
2965 | dprintk("NFSD: setclientid: string in use by client " | |
2966 | "at %s\n", addr_str); | |
1da177e4 LT |
2967 | goto out; |
2968 | } | |
1da177e4 | 2969 | } |
a99454aa | 2970 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 2971 | if (unconf) |
3dbacee6 | 2972 | unhash_client_locked(unconf); |
34b232bb | 2973 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2974 | /* case 1: probable callback update */ |
1da177e4 | 2975 | copy_clid(new, conf); |
34b232bb | 2976 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2977 | gen_clid(new, nn); |
8323c3b2 | 2978 | new->cl_minorversion = 0; |
6f3d772f | 2979 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2980 | add_to_unconfirmed(new); |
1da177e4 LT |
2981 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2982 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2983 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 2984 | new = NULL; |
1da177e4 LT |
2985 | status = nfs_ok; |
2986 | out: | |
3dbacee6 | 2987 | spin_unlock(&nn->client_lock); |
1da177e4 | 2988 | nfs4_unlock_state(); |
5cc40fd7 TM |
2989 | if (new) |
2990 | free_client(new); | |
3dbacee6 TM |
2991 | if (unconf) |
2992 | expire_client(unconf); | |
1da177e4 LT |
2993 | return status; |
2994 | } | |
2995 | ||
2996 | ||
b37ad28b | 2997 | __be32 |
b591480b BF |
2998 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2999 | struct nfsd4_compound_state *cstate, | |
3000 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3001 | { |
21ab45a4 | 3002 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3003 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3004 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3005 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3006 | __be32 status; |
7f2210fa | 3007 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3008 | |
2c142baa | 3009 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3010 | return nfserr_stale_clientid; |
1da177e4 | 3011 | nfs4_lock_state(); |
21ab45a4 | 3012 | |
d20c11d8 | 3013 | spin_lock(&nn->client_lock); |
8daae4dc | 3014 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3015 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3016 | /* |
8695b90a BF |
3017 | * We try hard to give out unique clientid's, so if we get an |
3018 | * attempt to confirm the same clientid with a different cred, | |
3019 | * there's a bug somewhere. Let's charitably assume it's our | |
3020 | * bug. | |
a186e767 | 3021 | */ |
8695b90a BF |
3022 | status = nfserr_serverfault; |
3023 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3024 | goto out; | |
3025 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3026 | goto out; | |
63db4632 | 3027 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3028 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3029 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3030 | status = nfs_ok; |
90d700b7 BF |
3031 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3032 | status = nfserr_stale_clientid; | |
3033 | goto out; | |
3034 | } | |
3035 | status = nfs_ok; | |
3036 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3037 | old = unconf; |
3038 | unhash_client_locked(old); | |
8695b90a | 3039 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3040 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3041 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3042 | if (old) { | |
3043 | status = mark_client_expired_locked(old); | |
221a6876 BF |
3044 | if (status) |
3045 | goto out; | |
221a6876 | 3046 | } |
8695b90a | 3047 | move_to_confirmed(unconf); |
d20c11d8 | 3048 | conf = unconf; |
08e8987c | 3049 | } |
d20c11d8 JL |
3050 | get_client_locked(conf); |
3051 | spin_unlock(&nn->client_lock); | |
3052 | nfsd4_probe_callback(conf); | |
3053 | spin_lock(&nn->client_lock); | |
3054 | put_client_renew_locked(conf); | |
1da177e4 | 3055 | out: |
d20c11d8 JL |
3056 | spin_unlock(&nn->client_lock); |
3057 | if (old) | |
3058 | expire_client(old); | |
1da177e4 LT |
3059 | nfs4_unlock_state(); |
3060 | return status; | |
3061 | } | |
3062 | ||
32513b40 BF |
3063 | static struct nfs4_file *nfsd4_alloc_file(void) |
3064 | { | |
3065 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3066 | } | |
3067 | ||
1da177e4 | 3068 | /* OPEN Share state helper functions */ |
f9c00c3a | 3069 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 3070 | { |
ca943217 | 3071 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 3072 | |
950e0118 TM |
3073 | lockdep_assert_held(&state_lock); |
3074 | ||
32513b40 | 3075 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3076 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3077 | INIT_LIST_HEAD(&fp->fi_stateids); |
3078 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 3079 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
3080 | fp->fi_had_conflict = false; |
3081 | fp->fi_lease = NULL; | |
baeb4ff0 | 3082 | fp->fi_share_deny = 0; |
32513b40 BF |
3083 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3084 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 3085 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3086 | } |
3087 | ||
e8ff2a84 | 3088 | void |
1da177e4 LT |
3089 | nfsd4_free_slabs(void) |
3090 | { | |
abf1135b CH |
3091 | kmem_cache_destroy(openowner_slab); |
3092 | kmem_cache_destroy(lockowner_slab); | |
3093 | kmem_cache_destroy(file_slab); | |
3094 | kmem_cache_destroy(stateid_slab); | |
3095 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3096 | } |
1da177e4 | 3097 | |
72083396 | 3098 | int |
e60d4398 N |
3099 | nfsd4_init_slabs(void) |
3100 | { | |
fe0750e5 BF |
3101 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3102 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3103 | if (openowner_slab == NULL) | |
abf1135b | 3104 | goto out; |
fe0750e5 | 3105 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3106 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3107 | if (lockowner_slab == NULL) |
abf1135b | 3108 | goto out_free_openowner_slab; |
e60d4398 | 3109 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3110 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3111 | if (file_slab == NULL) |
abf1135b | 3112 | goto out_free_lockowner_slab; |
5ac049ac | 3113 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3114 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3115 | if (stateid_slab == NULL) |
abf1135b | 3116 | goto out_free_file_slab; |
5b2d21c1 | 3117 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3118 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3119 | if (deleg_slab == NULL) |
abf1135b | 3120 | goto out_free_stateid_slab; |
e60d4398 | 3121 | return 0; |
abf1135b CH |
3122 | |
3123 | out_free_stateid_slab: | |
3124 | kmem_cache_destroy(stateid_slab); | |
3125 | out_free_file_slab: | |
3126 | kmem_cache_destroy(file_slab); | |
3127 | out_free_lockowner_slab: | |
3128 | kmem_cache_destroy(lockowner_slab); | |
3129 | out_free_openowner_slab: | |
3130 | kmem_cache_destroy(openowner_slab); | |
3131 | out: | |
e60d4398 N |
3132 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3133 | return -ENOMEM; | |
1da177e4 LT |
3134 | } |
3135 | ||
ff194bd9 | 3136 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3137 | { |
ff194bd9 BF |
3138 | rp->rp_status = nfserr_serverfault; |
3139 | rp->rp_buflen = 0; | |
3140 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3141 | mutex_init(&rp->rp_mutex); |
3142 | } | |
3143 | ||
3144 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3145 | struct nfs4_stateowner *so) | |
3146 | { | |
3147 | if (!nfsd4_has_session(cstate)) { | |
3148 | mutex_lock(&so->so_replay.rp_mutex); | |
3149 | cstate->replay_owner = so; | |
3150 | atomic_inc(&so->so_count); | |
3151 | } | |
3152 | } | |
3153 | ||
3154 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3155 | { | |
3156 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3157 | ||
3158 | if (so != NULL) { | |
3159 | cstate->replay_owner = NULL; | |
3160 | mutex_unlock(&so->so_replay.rp_mutex); | |
3161 | nfs4_put_stateowner(so); | |
3162 | } | |
1da177e4 LT |
3163 | } |
3164 | ||
fe0750e5 | 3165 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3166 | { |
1da177e4 | 3167 | struct nfs4_stateowner *sop; |
1da177e4 | 3168 | |
fe0750e5 | 3169 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3170 | if (!sop) |
3171 | return NULL; | |
3172 | ||
3173 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3174 | if (!sop->so_owner.data) { | |
fe0750e5 | 3175 | kmem_cache_free(slab, sop); |
1da177e4 | 3176 | return NULL; |
ff194bd9 BF |
3177 | } |
3178 | sop->so_owner.len = owner->len; | |
3179 | ||
ea1da636 | 3180 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3181 | sop->so_client = clp; |
3182 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3183 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3184 | return sop; |
3185 | } | |
3186 | ||
fe0750e5 | 3187 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3188 | { |
d4f0489f | 3189 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3190 | |
d4f0489f TM |
3191 | list_add(&oo->oo_owner.so_strhash, |
3192 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3193 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3194 | } |
3195 | ||
8f4b54c5 JL |
3196 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3197 | { | |
d4f0489f | 3198 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3199 | } |
3200 | ||
6b180f0b JL |
3201 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3202 | { | |
3203 | struct nfs4_openowner *oo = openowner(so); | |
3204 | ||
3205 | kmem_cache_free(openowner_slab, oo); | |
3206 | } | |
3207 | ||
3208 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3209 | .so_unhash = nfs4_unhash_openowner, |
3210 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3211 | }; |
3212 | ||
fe0750e5 | 3213 | static struct nfs4_openowner * |
13d6f66b | 3214 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3215 | struct nfsd4_compound_state *cstate) |
3216 | { | |
13d6f66b | 3217 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3218 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3219 | |
fe0750e5 BF |
3220 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3221 | if (!oo) | |
ff194bd9 | 3222 | return NULL; |
6b180f0b | 3223 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3224 | oo->oo_owner.so_is_open_owner = 1; |
3225 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3226 | oo->oo_flags = 0; |
db24b3b4 JL |
3227 | if (nfsd4_has_session(cstate)) |
3228 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3229 | oo->oo_time = 0; |
38c387b5 | 3230 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3231 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3232 | spin_lock(&clp->cl_lock); |
3233 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3234 | if (ret == NULL) { |
3235 | hash_openowner(oo, clp, strhashval); | |
3236 | ret = oo; | |
3237 | } else | |
3238 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3239 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3240 | return oo; |
1da177e4 LT |
3241 | } |
3242 | ||
996e0938 | 3243 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3244 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3245 | |
d6f2bc5d | 3246 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3247 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3248 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3249 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3250 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3251 | get_nfs4_file(fp); |
11b9164a | 3252 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3253 | stp->st_access_bmap = 0; |
3254 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3255 | stp->st_openstp = NULL; |
1c755dc1 JL |
3256 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3257 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3258 | spin_lock(&fp->fi_lock); |
3259 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3260 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3261 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3262 | } |
3263 | ||
d3134b10 JL |
3264 | /* |
3265 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3266 | * CLOSE replay. We still do need to release any file access that is held by | |
3267 | * them before returning however. | |
3268 | */ | |
fd39ca9a | 3269 | static void |
d3134b10 | 3270 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3271 | { |
217526e7 | 3272 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3273 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3274 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3275 | nfsd_net_id); | |
73758fed | 3276 | |
fe0750e5 | 3277 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3278 | |
b401be22 JL |
3279 | /* |
3280 | * We know that we hold one reference via nfsd4_close, and another | |
3281 | * "persistent" reference for the client. If the refcount is higher | |
3282 | * than 2, then there are still calls in progress that are using this | |
3283 | * stateid. We can't put the sc_file reference until they are finished. | |
3284 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3285 | * there should be no danger of the refcount going back up again at | |
3286 | * this point. | |
3287 | */ | |
3288 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3289 | ||
d3134b10 JL |
3290 | release_all_access(s); |
3291 | if (s->st_stid.sc_file) { | |
3292 | put_nfs4_file(s->st_stid.sc_file); | |
3293 | s->st_stid.sc_file = NULL; | |
3294 | } | |
217526e7 JL |
3295 | |
3296 | spin_lock(&nn->client_lock); | |
3297 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3298 | oo->oo_last_closed_stid = s; |
73758fed | 3299 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3300 | oo->oo_time = get_seconds(); |
217526e7 JL |
3301 | spin_unlock(&nn->client_lock); |
3302 | if (last) | |
3303 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3304 | } |
3305 | ||
1da177e4 LT |
3306 | /* search file_hashtbl[] for file */ |
3307 | static struct nfs4_file * | |
ca943217 | 3308 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3309 | { |
ca943217 | 3310 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3311 | struct nfs4_file *fp; |
3312 | ||
950e0118 TM |
3313 | lockdep_assert_held(&state_lock); |
3314 | ||
89876f8c | 3315 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3316 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3317 | get_nfs4_file(fp); |
1da177e4 | 3318 | return fp; |
13cd2184 | 3319 | } |
1da177e4 LT |
3320 | } |
3321 | return NULL; | |
3322 | } | |
3323 | ||
950e0118 | 3324 | static struct nfs4_file * |
ca943217 | 3325 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3326 | { |
3327 | struct nfs4_file *fp; | |
3328 | ||
3329 | spin_lock(&state_lock); | |
ca943217 | 3330 | fp = find_file_locked(fh); |
950e0118 TM |
3331 | spin_unlock(&state_lock); |
3332 | return fp; | |
3333 | } | |
3334 | ||
3335 | static struct nfs4_file * | |
f9c00c3a | 3336 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3337 | { |
3338 | struct nfs4_file *fp; | |
3339 | ||
3340 | spin_lock(&state_lock); | |
ca943217 | 3341 | fp = find_file_locked(fh); |
950e0118 | 3342 | if (fp == NULL) { |
f9c00c3a | 3343 | nfsd4_init_file(new, fh); |
950e0118 TM |
3344 | fp = new; |
3345 | } | |
3346 | spin_unlock(&state_lock); | |
3347 | ||
3348 | return fp; | |
3349 | } | |
3350 | ||
1da177e4 LT |
3351 | /* |
3352 | * Called to check deny when READ with all zero stateid or | |
3353 | * WRITE with all zero or all one stateid | |
3354 | */ | |
b37ad28b | 3355 | static __be32 |
1da177e4 LT |
3356 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3357 | { | |
1da177e4 | 3358 | struct nfs4_file *fp; |
baeb4ff0 | 3359 | __be32 ret = nfs_ok; |
1da177e4 | 3360 | |
ca943217 | 3361 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3362 | if (!fp) |
baeb4ff0 JL |
3363 | return ret; |
3364 | /* Check for conflicting share reservations */ | |
1d31a253 | 3365 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3366 | if (fp->fi_share_deny & deny_type) |
3367 | ret = nfserr_locked; | |
1d31a253 | 3368 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3369 | put_nfs4_file(fp); |
3370 | return ret; | |
1da177e4 LT |
3371 | } |
3372 | ||
02e1215f | 3373 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3374 | { |
11b9164a TM |
3375 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3376 | nfsd_net_id); | |
e8c69d17 | 3377 | |
11b9164a | 3378 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3379 | |
dff1399f | 3380 | /* |
f54fe962 JL |
3381 | * We can't do this in nfsd_break_deleg_cb because it is |
3382 | * already holding inode->i_lock. | |
3383 | * | |
dff1399f JL |
3384 | * If the dl_time != 0, then we know that it has already been |
3385 | * queued for a lease break. Don't queue it again. | |
3386 | */ | |
f54fe962 | 3387 | spin_lock(&state_lock); |
dff1399f | 3388 | if (dp->dl_time == 0) { |
dff1399f | 3389 | dp->dl_time = get_seconds(); |
02e1215f | 3390 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3391 | } |
02e1215f JL |
3392 | spin_unlock(&state_lock); |
3393 | } | |
1da177e4 | 3394 | |
02e1215f JL |
3395 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3396 | { | |
3397 | /* | |
3398 | * We're assuming the state code never drops its reference | |
3399 | * without first removing the lease. Since we're in this lease | |
3400 | * callback (and since the lease code is serialized by the kernel | |
3401 | * lock) we know the server hasn't removed the lease yet, we know | |
3402 | * it's safe to take a reference. | |
3403 | */ | |
72c0b0fb | 3404 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3405 | nfsd4_cb_recall(dp); |
3406 | } | |
3407 | ||
1c8c601a | 3408 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3409 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3410 | { | |
acfdf5c3 BF |
3411 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3412 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3413 | |
7fa10cd1 BF |
3414 | if (!fp) { |
3415 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3416 | return; | |
3417 | } | |
3418 | if (fp->fi_had_conflict) { | |
3419 | WARN(1, "duplicate break on %p\n", fp); | |
3420 | return; | |
3421 | } | |
0272e1fd BF |
3422 | /* |
3423 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3424 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3425 | * in time: |
0272e1fd BF |
3426 | */ |
3427 | fl->fl_break_time = 0; | |
1da177e4 | 3428 | |
02e1215f | 3429 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3430 | fp->fi_had_conflict = true; |
3431 | /* | |
3432 | * If there are no delegations on the list, then we can't count on this | |
3433 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3434 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3435 | * true should keep any new delegations from being hashed. | |
3436 | */ | |
3437 | if (list_empty(&fp->fi_delegations)) | |
3438 | fl->fl_break_time = jiffies; | |
3439 | else | |
3440 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3441 | nfsd_break_one_deleg(dp); | |
02e1215f | 3442 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3443 | } |
3444 | ||
1da177e4 LT |
3445 | static |
3446 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3447 | { | |
3448 | if (arg & F_UNLCK) | |
3449 | return lease_modify(onlist, arg); | |
3450 | else | |
3451 | return -EAGAIN; | |
3452 | } | |
3453 | ||
7b021967 | 3454 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3455 | .lm_break = nfsd_break_deleg_cb, |
3456 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3457 | }; |
3458 | ||
7a8711c9 BF |
3459 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3460 | { | |
3461 | if (nfsd4_has_session(cstate)) | |
3462 | return nfs_ok; | |
3463 | if (seqid == so->so_seqid - 1) | |
3464 | return nfserr_replay_me; | |
3465 | if (seqid == so->so_seqid) | |
3466 | return nfs_ok; | |
3467 | return nfserr_bad_seqid; | |
3468 | } | |
1da177e4 | 3469 | |
4b24ca7d JL |
3470 | static __be32 lookup_clientid(clientid_t *clid, |
3471 | struct nfsd4_compound_state *cstate, | |
3472 | struct nfsd_net *nn) | |
3473 | { | |
3474 | struct nfs4_client *found; | |
3475 | ||
3476 | if (cstate->clp) { | |
3477 | found = cstate->clp; | |
3478 | if (!same_clid(&found->cl_clientid, clid)) | |
3479 | return nfserr_stale_clientid; | |
3480 | return nfs_ok; | |
3481 | } | |
3482 | ||
3483 | if (STALE_CLIENTID(clid, nn)) | |
3484 | return nfserr_stale_clientid; | |
3485 | ||
3486 | /* | |
3487 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3488 | * cached already then we know this is for is for v4.0 and "sessions" | |
3489 | * will be false. | |
3490 | */ | |
3491 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3492 | spin_lock(&nn->client_lock); |
4b24ca7d | 3493 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3494 | if (!found) { |
3495 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3496 | return nfserr_expired; |
3e339f96 TM |
3497 | } |
3498 | atomic_inc(&found->cl_refcount); | |
3499 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3500 | |
3501 | /* Cache the nfs4_client in cstate! */ | |
3502 | cstate->clp = found; | |
4b24ca7d JL |
3503 | return nfs_ok; |
3504 | } | |
3505 | ||
b37ad28b | 3506 | __be32 |
6668958f | 3507 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3508 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3509 | { |
1da177e4 LT |
3510 | clientid_t *clientid = &open->op_clientid; |
3511 | struct nfs4_client *clp = NULL; | |
3512 | unsigned int strhashval; | |
fe0750e5 | 3513 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3514 | __be32 status; |
1da177e4 | 3515 | |
2c142baa | 3516 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3517 | return nfserr_stale_clientid; |
32513b40 BF |
3518 | /* |
3519 | * In case we need it later, after we've already created the | |
3520 | * file and don't want to risk a further failure: | |
3521 | */ | |
3522 | open->op_file = nfsd4_alloc_file(); | |
3523 | if (open->op_file == NULL) | |
3524 | return nfserr_jukebox; | |
1da177e4 | 3525 | |
2d91e895 TM |
3526 | status = lookup_clientid(clientid, cstate, nn); |
3527 | if (status) | |
3528 | return status; | |
3529 | clp = cstate->clp; | |
3530 | ||
d4f0489f TM |
3531 | strhashval = ownerstr_hashval(&open->op_owner); |
3532 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3533 | open->op_openowner = oo; |
3534 | if (!oo) { | |
bcf130f9 | 3535 | goto new_owner; |
1da177e4 | 3536 | } |
dad1c067 | 3537 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3538 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3539 | release_openowner(oo); |
3540 | open->op_openowner = NULL; | |
bcf130f9 | 3541 | goto new_owner; |
0f442aa2 | 3542 | } |
4cdc951b BF |
3543 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3544 | if (status) | |
3545 | return status; | |
4cdc951b | 3546 | goto alloc_stateid; |
bcf130f9 | 3547 | new_owner: |
13d6f66b | 3548 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3549 | if (oo == NULL) |
3550 | return nfserr_jukebox; | |
3551 | open->op_openowner = oo; | |
4cdc951b | 3552 | alloc_stateid: |
b49e084d | 3553 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3554 | if (!open->op_stp) |
3555 | return nfserr_jukebox; | |
0f442aa2 | 3556 | return nfs_ok; |
1da177e4 LT |
3557 | } |
3558 | ||
b37ad28b | 3559 | static inline __be32 |
4a6e43e6 N |
3560 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3561 | { | |
3562 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3563 | return nfserr_openmode; | |
3564 | else | |
3565 | return nfs_ok; | |
3566 | } | |
3567 | ||
f459e453 | 3568 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3569 | { |
f459e453 | 3570 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3571 | } |
3572 | ||
38c2f4b1 | 3573 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3574 | { |
f459e453 | 3575 | struct nfs4_stid *ret; |
24a0111e | 3576 | |
38c2f4b1 | 3577 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3578 | if (!ret) |
3579 | return NULL; | |
3580 | return delegstateid(ret); | |
24a0111e BF |
3581 | } |
3582 | ||
8b289b2c BF |
3583 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3584 | { | |
3585 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3586 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3587 | } | |
3588 | ||
b37ad28b | 3589 | static __be32 |
41d22663 | 3590 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3591 | struct nfs4_delegation **dp) |
3592 | { | |
3593 | int flags; | |
b37ad28b | 3594 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3595 | struct nfs4_delegation *deleg; |
567d9829 | 3596 | |
dcd94cc2 TM |
3597 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3598 | if (deleg == NULL) | |
c44c5eeb | 3599 | goto out; |
24a0111e | 3600 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3601 | status = nfs4_check_delegmode(deleg, flags); |
3602 | if (status) { | |
3603 | nfs4_put_stid(&deleg->dl_stid); | |
3604 | goto out; | |
3605 | } | |
3606 | *dp = deleg; | |
c44c5eeb | 3607 | out: |
8b289b2c | 3608 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3609 | return nfs_ok; |
3610 | if (status) | |
3611 | return status; | |
dad1c067 | 3612 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3613 | return nfs_ok; |
567d9829 N |
3614 | } |
3615 | ||
a46cb7f2 JL |
3616 | static struct nfs4_ol_stateid * |
3617 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3618 | { |
a46cb7f2 | 3619 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3620 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3621 | |
1d31a253 | 3622 | spin_lock(&fp->fi_lock); |
8beefa24 | 3623 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3624 | /* ignore lock owners */ |
3625 | if (local->st_stateowner->so_is_open_owner == 0) | |
3626 | continue; | |
baeb4ff0 | 3627 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3628 | ret = local; |
d6f2bc5d | 3629 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3630 | break; |
1d31a253 | 3631 | } |
1da177e4 | 3632 | } |
1d31a253 | 3633 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3634 | return ret; |
1da177e4 LT |
3635 | } |
3636 | ||
21fb4016 BF |
3637 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3638 | { | |
3639 | int flags = 0; | |
3640 | ||
3641 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3642 | flags |= NFSD_MAY_READ; | |
3643 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3644 | flags |= NFSD_MAY_WRITE; | |
3645 | return flags; | |
3646 | } | |
3647 | ||
7e6a72e5 CH |
3648 | static inline __be32 |
3649 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3650 | struct nfsd4_open *open) | |
3651 | { | |
3652 | struct iattr iattr = { | |
3653 | .ia_valid = ATTR_SIZE, | |
3654 | .ia_size = 0, | |
3655 | }; | |
3656 | if (!open->op_truncate) | |
3657 | return 0; | |
3658 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3659 | return nfserr_inval; | |
3660 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3661 | } | |
3662 | ||
0c12eaff | 3663 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3664 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3665 | struct nfsd4_open *open) | |
f9d7562f | 3666 | { |
de18643d | 3667 | struct file *filp = NULL; |
f9d7562f | 3668 | __be32 status; |
0c12eaff CB |
3669 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3670 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3671 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3672 | |
de18643d | 3673 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3674 | |
3675 | /* | |
3676 | * Are we trying to set a deny mode that would conflict with | |
3677 | * current access? | |
3678 | */ | |
3679 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3680 | if (status != nfs_ok) { | |
3681 | spin_unlock(&fp->fi_lock); | |
3682 | goto out; | |
3683 | } | |
3684 | ||
3685 | /* set access to the file */ | |
3686 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3687 | if (status != nfs_ok) { | |
3688 | spin_unlock(&fp->fi_lock); | |
3689 | goto out; | |
3690 | } | |
3691 | ||
3692 | /* Set access bits in stateid */ | |
3693 | old_access_bmap = stp->st_access_bmap; | |
3694 | set_access(open->op_share_access, stp); | |
3695 | ||
3696 | /* Set new deny mask */ | |
3697 | old_deny_bmap = stp->st_deny_bmap; | |
3698 | set_deny(open->op_share_deny, stp); | |
3699 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3700 | ||
f9d7562f | 3701 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3702 | spin_unlock(&fp->fi_lock); |
3703 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3704 | if (status) |
baeb4ff0 | 3705 | goto out_put_access; |
de18643d TM |
3706 | spin_lock(&fp->fi_lock); |
3707 | if (!fp->fi_fds[oflag]) { | |
3708 | fp->fi_fds[oflag] = filp; | |
3709 | filp = NULL; | |
3710 | } | |
f9d7562f | 3711 | } |
de18643d TM |
3712 | spin_unlock(&fp->fi_lock); |
3713 | if (filp) | |
3714 | fput(filp); | |
f9d7562f | 3715 | |
7e6a72e5 CH |
3716 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3717 | if (status) | |
3718 | goto out_put_access; | |
7e6a72e5 CH |
3719 | out: |
3720 | return status; | |
baeb4ff0 JL |
3721 | out_put_access: |
3722 | stp->st_access_bmap = old_access_bmap; | |
3723 | nfs4_file_put_access(fp, open->op_share_access); | |
3724 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3725 | goto out; | |
1da177e4 LT |
3726 | } |
3727 | ||
b37ad28b | 3728 | static __be32 |
dcef0413 | 3729 | 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 | 3730 | { |
b37ad28b | 3731 | __be32 status; |
baeb4ff0 | 3732 | unsigned char old_deny_bmap; |
1da177e4 | 3733 | |
6eb3a1d0 | 3734 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3735 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3736 | |
baeb4ff0 JL |
3737 | /* test and set deny mode */ |
3738 | spin_lock(&fp->fi_lock); | |
3739 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3740 | if (status == nfs_ok) { | |
3741 | old_deny_bmap = stp->st_deny_bmap; | |
3742 | set_deny(open->op_share_deny, stp); | |
3743 | fp->fi_share_deny |= | |
3744 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3745 | } | |
3746 | spin_unlock(&fp->fi_lock); | |
3747 | ||
3748 | if (status != nfs_ok) | |
1da177e4 | 3749 | return status; |
1da177e4 | 3750 | |
baeb4ff0 JL |
3751 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3752 | if (status != nfs_ok) | |
3753 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3754 | return status; | |
3755 | } | |
1da177e4 | 3756 | |
1da177e4 | 3757 | static void |
1255a8f3 | 3758 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3759 | { |
dad1c067 | 3760 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3761 | } |
3762 | ||
14a24e99 BF |
3763 | /* Should we give out recallable state?: */ |
3764 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3765 | { | |
3766 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3767 | return true; | |
3768 | /* | |
3769 | * In the sessions case, since we don't have to establish a | |
3770 | * separate connection for callbacks, we assume it's OK | |
3771 | * until we hear otherwise: | |
3772 | */ | |
3773 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3774 | } | |
3775 | ||
d564fbec | 3776 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3777 | { |
3778 | struct file_lock *fl; | |
3779 | ||
3780 | fl = locks_alloc_lock(); | |
3781 | if (!fl) | |
3782 | return NULL; | |
3783 | locks_init_lock(fl); | |
3784 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3785 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3786 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3787 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3788 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3789 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3790 | return fl; |
3791 | } | |
3792 | ||
99c41515 | 3793 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3794 | { |
11b9164a | 3795 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3796 | struct file_lock *fl; |
417c6629 JL |
3797 | struct file *filp; |
3798 | int status = 0; | |
edab9782 | 3799 | |
d564fbec | 3800 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3801 | if (!fl) |
3802 | return -ENOMEM; | |
417c6629 JL |
3803 | filp = find_readable_file(fp); |
3804 | if (!filp) { | |
3805 | /* We should always have a readable file here */ | |
3806 | WARN_ON_ONCE(1); | |
3807 | return -EBADF; | |
3808 | } | |
3809 | fl->fl_file = filp; | |
3810 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3811 | if (status) { | |
3812 | locks_free_lock(fl); | |
3813 | goto out_fput; | |
3814 | } | |
3815 | spin_lock(&state_lock); | |
3816 | spin_lock(&fp->fi_lock); | |
3817 | /* Did the lease get broken before we took the lock? */ | |
3818 | status = -EAGAIN; | |
3819 | if (fp->fi_had_conflict) | |
3820 | goto out_unlock; | |
3821 | /* Race breaker */ | |
3822 | if (fp->fi_lease) { | |
3823 | status = 0; | |
3824 | atomic_inc(&fp->fi_delegees); | |
3825 | hash_delegation_locked(dp, fp); | |
3826 | goto out_unlock; | |
3827 | } | |
acfdf5c3 | 3828 | fp->fi_lease = fl; |
417c6629 | 3829 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3830 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3831 | hash_delegation_locked(dp, fp); |
417c6629 | 3832 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3833 | spin_unlock(&state_lock); |
acfdf5c3 | 3834 | return 0; |
417c6629 JL |
3835 | out_unlock: |
3836 | spin_unlock(&fp->fi_lock); | |
3837 | spin_unlock(&state_lock); | |
3838 | out_fput: | |
3839 | fput(filp); | |
e873088f | 3840 | return status; |
acfdf5c3 BF |
3841 | } |
3842 | ||
0b26693c JL |
3843 | static struct nfs4_delegation * |
3844 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3845 | struct nfs4_file *fp) | |
acfdf5c3 | 3846 | { |
0b26693c JL |
3847 | int status; |
3848 | struct nfs4_delegation *dp; | |
417c6629 | 3849 | |
bf7bd3e9 | 3850 | if (fp->fi_had_conflict) |
0b26693c JL |
3851 | return ERR_PTR(-EAGAIN); |
3852 | ||
3853 | dp = alloc_init_deleg(clp, fh); | |
3854 | if (!dp) | |
3855 | return ERR_PTR(-ENOMEM); | |
3856 | ||
bf7bd3e9 | 3857 | get_nfs4_file(fp); |
417c6629 JL |
3858 | spin_lock(&state_lock); |
3859 | spin_lock(&fp->fi_lock); | |
11b9164a | 3860 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3861 | if (!fp->fi_lease) { |
3862 | spin_unlock(&fp->fi_lock); | |
3863 | spin_unlock(&state_lock); | |
0b26693c JL |
3864 | status = nfs4_setlease(dp); |
3865 | goto out; | |
417c6629 | 3866 | } |
cbf7a75b | 3867 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3868 | if (fp->fi_had_conflict) { |
417c6629 JL |
3869 | status = -EAGAIN; |
3870 | goto out_unlock; | |
acfdf5c3 | 3871 | } |
931ee56c | 3872 | hash_delegation_locked(dp, fp); |
0b26693c | 3873 | status = 0; |
417c6629 JL |
3874 | out_unlock: |
3875 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3876 | spin_unlock(&state_lock); |
0b26693c JL |
3877 | out: |
3878 | if (status) { | |
6011695d | 3879 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3880 | return ERR_PTR(status); |
3881 | } | |
3882 | return dp; | |
edab9782 BF |
3883 | } |
3884 | ||
4aa8913c BH |
3885 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3886 | { | |
3887 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3888 | if (status == -EAGAIN) | |
3889 | open->op_why_no_deleg = WND4_CONTENTION; | |
3890 | else { | |
3891 | open->op_why_no_deleg = WND4_RESOURCE; | |
3892 | switch (open->op_deleg_want) { | |
3893 | case NFS4_SHARE_WANT_READ_DELEG: | |
3894 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3895 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3896 | break; | |
3897 | case NFS4_SHARE_WANT_CANCEL: | |
3898 | open->op_why_no_deleg = WND4_CANCELLED; | |
3899 | break; | |
3900 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3901 | WARN_ON_ONCE(1); |
4aa8913c BH |
3902 | } |
3903 | } | |
3904 | } | |
3905 | ||
1da177e4 LT |
3906 | /* |
3907 | * Attempt to hand out a delegation. | |
99c41515 BF |
3908 | * |
3909 | * Note we don't support write delegations, and won't until the vfs has | |
3910 | * proper support for them. | |
1da177e4 LT |
3911 | */ |
3912 | static void | |
4cf59221 JL |
3913 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3914 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3915 | { |
3916 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3917 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3918 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3919 | int cb_up; |
99c41515 | 3920 | int status = 0; |
1da177e4 | 3921 | |
fe0750e5 | 3922 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3923 | open->op_recall = 0; |
3924 | switch (open->op_claim_type) { | |
3925 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3926 | if (!cb_up) |
7b190fec | 3927 | open->op_recall = 1; |
99c41515 BF |
3928 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3929 | goto out_no_deleg; | |
7b190fec N |
3930 | break; |
3931 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3932 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3933 | /* |
3934 | * Let's not give out any delegations till everyone's | |
3935 | * had the chance to reclaim theirs.... | |
3936 | */ | |
4cf59221 | 3937 | if (locks_in_grace(clp->net)) |
99c41515 | 3938 | goto out_no_deleg; |
dad1c067 | 3939 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3940 | goto out_no_deleg; |
9a0590ae SD |
3941 | /* |
3942 | * Also, if the file was opened for write or | |
3943 | * create, there's a good chance the client's | |
3944 | * about to write to it, resulting in an | |
3945 | * immediate recall (since we don't support | |
3946 | * write delegations): | |
3947 | */ | |
7b190fec | 3948 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3949 | goto out_no_deleg; |
3950 | if (open->op_create == NFS4_OPEN_CREATE) | |
3951 | goto out_no_deleg; | |
7b190fec N |
3952 | break; |
3953 | default: | |
99c41515 | 3954 | goto out_no_deleg; |
7b190fec | 3955 | } |
11b9164a | 3956 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3957 | if (IS_ERR(dp)) |
dd239cc0 | 3958 | goto out_no_deleg; |
1da177e4 | 3959 | |
d5477a8d | 3960 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3961 | |
8c10cbdb | 3962 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3963 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3964 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3965 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3966 | return; |
dd239cc0 | 3967 | out_no_deleg: |
99c41515 BF |
3968 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3969 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3970 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3971 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3972 | open->op_recall = 1; |
3973 | } | |
99c41515 BF |
3974 | |
3975 | /* 4.1 client asking for a delegation? */ | |
3976 | if (open->op_deleg_want) | |
3977 | nfsd4_open_deleg_none_ext(open, status); | |
3978 | return; | |
1da177e4 LT |
3979 | } |
3980 | ||
e27f49c3 BH |
3981 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3982 | struct nfs4_delegation *dp) | |
3983 | { | |
3984 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3985 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3986 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3987 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3988 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3989 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3990 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3991 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3992 | } | |
3993 | /* Otherwise the client must be confused wanting a delegation | |
3994 | * it already has, therefore we don't return | |
3995 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3996 | */ | |
3997 | } | |
3998 | ||
1da177e4 LT |
3999 | /* |
4000 | * called with nfs4_lock_state() held. | |
4001 | */ | |
b37ad28b | 4002 | __be32 |
1da177e4 LT |
4003 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4004 | { | |
6668958f | 4005 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4006 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4007 | struct nfs4_file *fp = NULL; |
dcef0413 | 4008 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4009 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4010 | __be32 status; |
1da177e4 | 4011 | |
1da177e4 LT |
4012 | /* |
4013 | * Lookup file; if found, lookup stateid and check open request, | |
4014 | * and check for delegations in the process of being recalled. | |
4015 | * If not found, create the nfs4_file struct | |
4016 | */ | |
f9c00c3a | 4017 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4018 | if (fp != open->op_file) { |
41d22663 | 4019 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4020 | if (status) |
4021 | goto out; | |
a46cb7f2 | 4022 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 4023 | } else { |
950e0118 | 4024 | open->op_file = NULL; |
c44c5eeb | 4025 | status = nfserr_bad_stateid; |
8b289b2c | 4026 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4027 | goto out; |
3e772463 | 4028 | status = nfserr_jukebox; |
1da177e4 LT |
4029 | } |
4030 | ||
4031 | /* | |
4032 | * OPEN the file, or upgrade an existing OPEN. | |
4033 | * If truncate fails, the OPEN fails. | |
4034 | */ | |
4035 | if (stp) { | |
4036 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4037 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4038 | if (status) |
4039 | goto out; | |
4040 | } else { | |
4cdc951b BF |
4041 | stp = open->op_stp; |
4042 | open->op_stp = NULL; | |
996e0938 | 4043 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4044 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4045 | if (status) { | |
4046 | release_open_stateid(stp); | |
4047 | goto out; | |
4048 | } | |
1da177e4 | 4049 | } |
dcef0413 BF |
4050 | update_stateid(&stp->st_stid.sc_stateid); |
4051 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4052 | |
d24433cd | 4053 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4054 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4055 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4056 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4057 | goto nodeleg; | |
4058 | } | |
4059 | } | |
4060 | ||
1da177e4 LT |
4061 | /* |
4062 | * Attempt to hand out a delegation. No error return, because the | |
4063 | * OPEN succeeds even if we fail. | |
4064 | */ | |
4cf59221 | 4065 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4066 | nodeleg: |
1da177e4 LT |
4067 | status = nfs_ok; |
4068 | ||
8c10cbdb | 4069 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4070 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4071 | out: |
d24433cd BH |
4072 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4073 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4074 | open->op_deleg_want) |
4075 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4076 | |
13cd2184 N |
4077 | if (fp) |
4078 | put_nfs4_file(fp); | |
37515177 | 4079 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4080 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4081 | /* |
4082 | * To finish the open response, we just need to set the rflags. | |
4083 | */ | |
4084 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4085 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4086 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4087 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4088 | if (dp) |
4089 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4090 | if (stp) |
4091 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4092 | |
4093 | return status; | |
4094 | } | |
4095 | ||
58fb12e6 JL |
4096 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
4097 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
4098 | { |
4099 | if (open->op_openowner) { | |
d3134b10 JL |
4100 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4101 | ||
4102 | nfsd4_cstate_assign_replay(cstate, so); | |
4103 | nfs4_put_stateowner(so); | |
d29b20cd | 4104 | } |
32513b40 BF |
4105 | if (open->op_file) |
4106 | nfsd4_free_file(open->op_file); | |
4cdc951b | 4107 | if (open->op_stp) |
6011695d | 4108 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
4109 | } |
4110 | ||
b37ad28b | 4111 | __be32 |
b591480b BF |
4112 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4113 | clientid_t *clid) | |
1da177e4 LT |
4114 | { |
4115 | struct nfs4_client *clp; | |
b37ad28b | 4116 | __be32 status; |
7f2210fa | 4117 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4118 | |
4119 | nfs4_lock_state(); | |
4120 | dprintk("process_renew(%08x/%08x): starting\n", | |
4121 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4122 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4123 | if (status) |
1da177e4 | 4124 | goto out; |
4b24ca7d | 4125 | clp = cstate->clp; |
1da177e4 | 4126 | status = nfserr_cb_path_down; |
ea1da636 | 4127 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4128 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4129 | goto out; |
4130 | status = nfs_ok; | |
4131 | out: | |
4132 | nfs4_unlock_state(); | |
4133 | return status; | |
4134 | } | |
4135 | ||
a76b4319 | 4136 | static void |
12760c66 | 4137 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4138 | { |
33dcc481 | 4139 | /* do nothing if grace period already ended */ |
a51c84ed | 4140 | if (nn->grace_ended) |
33dcc481 JL |
4141 | return; |
4142 | ||
a76b4319 | 4143 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4144 | nn->grace_ended = true; |
12760c66 | 4145 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4146 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4147 | /* |
4148 | * Now that every NFSv4 client has had the chance to recover and | |
4149 | * to see the (possibly new, possibly shorter) lease time, we | |
4150 | * can safely set the next grace time to the current lease time: | |
4151 | */ | |
5284b44e | 4152 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4153 | } |
4154 | ||
fd39ca9a | 4155 | static time_t |
09121281 | 4156 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4157 | { |
4158 | struct nfs4_client *clp; | |
fe0750e5 | 4159 | struct nfs4_openowner *oo; |
1da177e4 | 4160 | struct nfs4_delegation *dp; |
217526e7 | 4161 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4162 | struct list_head *pos, *next, reaplist; |
3d733711 | 4163 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4164 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
4165 | |
4166 | nfs4_lock_state(); | |
4167 | ||
4168 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 4169 | nfsd4_end_grace(nn); |
36acb66b | 4170 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4171 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4172 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4173 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4174 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4175 | t = clp->cl_time - cutoff; | |
a832e7ae | 4176 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4177 | break; |
4178 | } | |
221a6876 | 4179 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4180 | dprintk("NFSD: client in use (clientid %08x)\n", |
4181 | clp->cl_clientid.cl_id); | |
4182 | continue; | |
4183 | } | |
4864af97 | 4184 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4185 | } |
c9a49628 | 4186 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4187 | list_for_each_safe(pos, next, &reaplist) { |
4188 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4189 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4190 | clp->cl_clientid.cl_id); | |
4864af97 | 4191 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4192 | expire_client(clp); |
4193 | } | |
cdc97505 | 4194 | spin_lock(&state_lock); |
e8c69d17 | 4195 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4196 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4197 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4198 | continue; | |
1da177e4 | 4199 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4200 | t = dp->dl_time - cutoff; |
4201 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4202 | break; |
4203 | } | |
42690676 JL |
4204 | unhash_delegation_locked(dp); |
4205 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4206 | } |
cdc97505 | 4207 | spin_unlock(&state_lock); |
2d4a532d JL |
4208 | while (!list_empty(&reaplist)) { |
4209 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4210 | dl_recall_lru); | |
4211 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4212 | revoke_delegation(dp); |
1da177e4 | 4213 | } |
217526e7 JL |
4214 | |
4215 | spin_lock(&nn->client_lock); | |
4216 | while (!list_empty(&nn->close_lru)) { | |
4217 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4218 | oo_close_lru); | |
4219 | if (time_after((unsigned long)oo->oo_time, | |
4220 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4221 | t = oo->oo_time - cutoff; |
4222 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4223 | break; |
4224 | } | |
217526e7 JL |
4225 | list_del_init(&oo->oo_close_lru); |
4226 | stp = oo->oo_last_closed_stid; | |
4227 | oo->oo_last_closed_stid = NULL; | |
4228 | spin_unlock(&nn->client_lock); | |
4229 | nfs4_put_stid(&stp->st_stid); | |
4230 | spin_lock(&nn->client_lock); | |
1da177e4 | 4231 | } |
217526e7 JL |
4232 | spin_unlock(&nn->client_lock); |
4233 | ||
a832e7ae | 4234 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4235 | nfs4_unlock_state(); |
a832e7ae | 4236 | return new_timeo; |
1da177e4 LT |
4237 | } |
4238 | ||
a254b246 HH |
4239 | static struct workqueue_struct *laundry_wq; |
4240 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4241 | |
4242 | static void | |
09121281 | 4243 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4244 | { |
4245 | time_t t; | |
09121281 SK |
4246 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4247 | work); | |
4248 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4249 | laundromat_work); | |
1da177e4 | 4250 | |
09121281 | 4251 | t = nfs4_laundromat(nn); |
1da177e4 | 4252 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4253 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4254 | } |
4255 | ||
f7a4d872 | 4256 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4257 | { |
11b9164a | 4258 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4259 | return nfserr_bad_stateid; |
4260 | return nfs_ok; | |
1da177e4 LT |
4261 | } |
4262 | ||
1da177e4 | 4263 | static inline int |
82c5ff1b | 4264 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4265 | { |
82c5ff1b JL |
4266 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4267 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4268 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4269 | } |
4270 | ||
4271 | static inline int | |
82c5ff1b | 4272 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4273 | { |
82c5ff1b JL |
4274 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4275 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4276 | } |
4277 | ||
4278 | static | |
dcef0413 | 4279 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4280 | { |
b37ad28b | 4281 | __be32 status = nfserr_openmode; |
1da177e4 | 4282 | |
02921914 BF |
4283 | /* For lock stateid's, we test the parent open, not the lock: */ |
4284 | if (stp->st_openstp) | |
4285 | stp = stp->st_openstp; | |
82c5ff1b | 4286 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4287 | goto out; |
82c5ff1b | 4288 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4289 | goto out; |
4290 | status = nfs_ok; | |
4291 | out: | |
4292 | return status; | |
4293 | } | |
4294 | ||
b37ad28b | 4295 | static inline __be32 |
5ccb0066 | 4296 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4297 | { |
203a8c8e | 4298 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4299 | return nfs_ok; |
5ccb0066 | 4300 | else if (locks_in_grace(net)) { |
25985edc | 4301 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4302 | * conflicting state; so we must wait out the grace period. */ |
4303 | return nfserr_grace; | |
4304 | } else if (flags & WR_STATE) | |
4305 | return nfs4_share_conflict(current_fh, | |
4306 | NFS4_SHARE_DENY_WRITE); | |
4307 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4308 | return nfs4_share_conflict(current_fh, | |
4309 | NFS4_SHARE_DENY_READ); | |
4310 | } | |
4311 | ||
4312 | /* | |
4313 | * Allow READ/WRITE during grace period on recovered state only for files | |
4314 | * that are not able to provide mandatory locking. | |
4315 | */ | |
4316 | static inline int | |
5ccb0066 | 4317 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4318 | { |
5ccb0066 | 4319 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4320 | } |
4321 | ||
81b82965 BF |
4322 | /* Returns true iff a is later than b: */ |
4323 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4324 | { | |
1a9357f4 | 4325 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4326 | } |
4327 | ||
57b7b43b | 4328 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4329 | { |
6668958f AA |
4330 | /* |
4331 | * When sessions are used the stateid generation number is ignored | |
4332 | * when it is zero. | |
4333 | */ | |
28dde241 | 4334 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4335 | return nfs_ok; |
4336 | ||
4337 | if (in->si_generation == ref->si_generation) | |
4338 | return nfs_ok; | |
6668958f | 4339 | |
0836f587 | 4340 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4341 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4342 | return nfserr_bad_stateid; |
4343 | /* | |
81b82965 BF |
4344 | * However, we could see a stateid from the past, even from a |
4345 | * non-buggy client. For example, if the client sends a lock | |
4346 | * while some IO is outstanding, the lock may bump si_generation | |
4347 | * while the IO is still in flight. The client could avoid that | |
4348 | * situation by waiting for responses on all the IO requests, | |
4349 | * but better performance may result in retrying IO that | |
4350 | * receives an old_stateid error if requests are rarely | |
4351 | * reordered in flight: | |
0836f587 | 4352 | */ |
81b82965 | 4353 | return nfserr_old_stateid; |
0836f587 BF |
4354 | } |
4355 | ||
7df302f7 | 4356 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4357 | { |
97b7e3b6 BF |
4358 | struct nfs4_stid *s; |
4359 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4360 | __be32 status = nfserr_bad_stateid; |
17456804 | 4361 | |
7df302f7 | 4362 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4363 | return status; |
7df302f7 CL |
4364 | /* Client debugging aid. */ |
4365 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4366 | char addr_str[INET6_ADDRSTRLEN]; | |
4367 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4368 | sizeof(addr_str)); | |
4369 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4370 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4371 | return status; |
7df302f7 | 4372 | } |
1af71cc8 JL |
4373 | spin_lock(&cl->cl_lock); |
4374 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4375 | if (!s) |
1af71cc8 | 4376 | goto out_unlock; |
36279ac1 | 4377 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4378 | if (status) |
1af71cc8 | 4379 | goto out_unlock; |
23340032 BF |
4380 | switch (s->sc_type) { |
4381 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4382 | status = nfs_ok; |
4383 | break; | |
3bd64a5b | 4384 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4385 | status = nfserr_deleg_revoked; |
4386 | break; | |
23340032 BF |
4387 | case NFS4_OPEN_STID: |
4388 | case NFS4_LOCK_STID: | |
4389 | ols = openlockstateid(s); | |
4390 | if (ols->st_stateowner->so_is_open_owner | |
4391 | && !(openowner(ols->st_stateowner)->oo_flags | |
4392 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4393 | status = nfserr_bad_stateid; |
4394 | else | |
4395 | status = nfs_ok; | |
4396 | break; | |
23340032 BF |
4397 | default: |
4398 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4399 | /* Fallthrough */ |
23340032 | 4400 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4401 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4402 | status = nfserr_bad_stateid; |
23340032 | 4403 | } |
1af71cc8 JL |
4404 | out_unlock: |
4405 | spin_unlock(&cl->cl_lock); | |
4406 | return status; | |
17456804 BS |
4407 | } |
4408 | ||
2dd6e458 TM |
4409 | static __be32 |
4410 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4411 | stateid_t *stateid, unsigned char typemask, | |
4412 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4413 | { |
0eb6f20a | 4414 | __be32 status; |
38c2f4b1 BF |
4415 | |
4416 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4417 | return nfserr_bad_stateid; | |
4b24ca7d | 4418 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4419 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4420 | if (cstate->session) |
a8a7c677 | 4421 | return nfserr_bad_stateid; |
38c2f4b1 | 4422 | return nfserr_stale_stateid; |
a8a7c677 | 4423 | } |
0eb6f20a BF |
4424 | if (status) |
4425 | return status; | |
4b24ca7d | 4426 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4427 | if (!*s) |
4428 | return nfserr_bad_stateid; | |
4429 | return nfs_ok; | |
38c2f4b1 BF |
4430 | } |
4431 | ||
1da177e4 LT |
4432 | /* |
4433 | * Checks for stateid operations | |
4434 | */ | |
b37ad28b | 4435 | __be32 |
5ccb0066 | 4436 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4437 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4438 | { |
69064a27 | 4439 | struct nfs4_stid *s; |
dcef0413 | 4440 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4441 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4442 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4443 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4444 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4445 | struct file *file = NULL; |
b37ad28b | 4446 | __be32 status; |
1da177e4 | 4447 | |
1da177e4 LT |
4448 | if (filpp) |
4449 | *filpp = NULL; | |
4450 | ||
5ccb0066 | 4451 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4452 | return nfserr_grace; |
4453 | ||
4454 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4455 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4456 | |
14bcab1a TM |
4457 | nfs4_lock_state(); |
4458 | ||
2dd6e458 | 4459 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4460 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4461 | &s, nn); |
38c2f4b1 | 4462 | if (status) |
fd911011 | 4463 | goto unlock_state; |
69064a27 BF |
4464 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4465 | if (status) | |
4466 | goto out; | |
f7a4d872 BF |
4467 | switch (s->sc_type) { |
4468 | case NFS4_DELEG_STID: | |
69064a27 | 4469 | dp = delegstateid(s); |
dc9bf700 BF |
4470 | status = nfs4_check_delegmode(dp, flags); |
4471 | if (status) | |
4472 | goto out; | |
43b0178e | 4473 | if (filpp) { |
11b9164a | 4474 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4475 | if (!file) { |
063b0fb9 BF |
4476 | WARN_ON_ONCE(1); |
4477 | status = nfserr_serverfault; | |
4478 | goto out; | |
4479 | } | |
de18643d | 4480 | get_file(file); |
43b0178e | 4481 | } |
f7a4d872 BF |
4482 | break; |
4483 | case NFS4_OPEN_STID: | |
4484 | case NFS4_LOCK_STID: | |
69064a27 | 4485 | stp = openlockstateid(s); |
f7a4d872 BF |
4486 | status = nfs4_check_fh(current_fh, stp); |
4487 | if (status) | |
1da177e4 | 4488 | goto out; |
fe0750e5 | 4489 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4490 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4491 | goto out; |
a4455be0 BF |
4492 | status = nfs4_check_openmode(stp, flags); |
4493 | if (status) | |
1da177e4 | 4494 | goto out; |
f9d7562f | 4495 | if (filpp) { |
11b9164a TM |
4496 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4497 | ||
f9d7562f | 4498 | if (flags & RD_STATE) |
11b9164a | 4499 | file = find_readable_file(fp); |
f9d7562f | 4500 | else |
11b9164a | 4501 | file = find_writeable_file(fp); |
f9d7562f | 4502 | } |
f7a4d872 BF |
4503 | break; |
4504 | default: | |
14bcab1a TM |
4505 | status = nfserr_bad_stateid; |
4506 | goto out; | |
1da177e4 LT |
4507 | } |
4508 | status = nfs_ok; | |
14bcab1a | 4509 | if (file) |
de18643d | 4510 | *filpp = file; |
1da177e4 | 4511 | out: |
fd911011 TM |
4512 | nfs4_put_stid(s); |
4513 | unlock_state: | |
14bcab1a | 4514 | nfs4_unlock_state(); |
1da177e4 LT |
4515 | return status; |
4516 | } | |
4517 | ||
17456804 BS |
4518 | /* |
4519 | * Test if the stateid is valid | |
4520 | */ | |
4521 | __be32 | |
4522 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4523 | struct nfsd4_test_stateid *test_stateid) | |
4524 | { | |
03cfb420 BS |
4525 | struct nfsd4_test_stateid_id *stateid; |
4526 | struct nfs4_client *cl = cstate->session->se_client; | |
4527 | ||
4528 | nfs4_lock_state(); | |
4529 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4530 | stateid->ts_id_status = |
4531 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4532 | nfs4_unlock_state(); |
4533 | ||
17456804 BS |
4534 | return nfs_ok; |
4535 | } | |
4536 | ||
e1ca12df BS |
4537 | __be32 |
4538 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4539 | struct nfsd4_free_stateid *free_stateid) | |
4540 | { | |
4541 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4542 | struct nfs4_stid *s; |
3bd64a5b | 4543 | struct nfs4_delegation *dp; |
fc5a96c3 | 4544 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4545 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4546 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4547 | |
4548 | nfs4_lock_state(); | |
1af71cc8 JL |
4549 | spin_lock(&cl->cl_lock); |
4550 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4551 | if (!s) |
1af71cc8 | 4552 | goto out_unlock; |
2da1cec7 BF |
4553 | switch (s->sc_type) { |
4554 | case NFS4_DELEG_STID: | |
e1ca12df | 4555 | ret = nfserr_locks_held; |
1af71cc8 | 4556 | break; |
2da1cec7 | 4557 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4558 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4559 | if (ret) | |
1af71cc8 JL |
4560 | break; |
4561 | ret = nfserr_locks_held; | |
f7a4d872 | 4562 | break; |
1af71cc8 JL |
4563 | case NFS4_LOCK_STID: |
4564 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4565 | if (ret) | |
4566 | break; | |
fc5a96c3 JL |
4567 | stp = openlockstateid(s); |
4568 | ret = nfserr_locks_held; | |
4569 | if (check_for_locks(stp->st_stid.sc_file, | |
4570 | lockowner(stp->st_stateowner))) | |
4571 | break; | |
4572 | unhash_lock_stateid(stp); | |
1af71cc8 | 4573 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4574 | nfs4_put_stid(s); |
4575 | ret = nfs_ok; | |
1af71cc8 | 4576 | goto out; |
3bd64a5b BF |
4577 | case NFS4_REVOKED_DELEG_STID: |
4578 | dp = delegstateid(s); | |
2d4a532d JL |
4579 | list_del_init(&dp->dl_recall_lru); |
4580 | spin_unlock(&cl->cl_lock); | |
6011695d | 4581 | nfs4_put_stid(s); |
3bd64a5b | 4582 | ret = nfs_ok; |
1af71cc8 JL |
4583 | goto out; |
4584 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4585 | } |
1af71cc8 JL |
4586 | out_unlock: |
4587 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4588 | out: |
4589 | nfs4_unlock_state(); | |
4590 | return ret; | |
4591 | } | |
4592 | ||
4c4cd222 N |
4593 | static inline int |
4594 | setlkflg (int type) | |
4595 | { | |
4596 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4597 | RD_STATE : WR_STATE; | |
4598 | } | |
1da177e4 | 4599 | |
dcef0413 | 4600 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4601 | { |
4602 | struct svc_fh *current_fh = &cstate->current_fh; | |
4603 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4604 | __be32 status; | |
4605 | ||
c0a5d93e BF |
4606 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4607 | if (status) | |
4608 | return status; | |
3bd64a5b BF |
4609 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4610 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4611 | /* |
4612 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4613 | * nfserr_replay_me from the previous step, and |
4614 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4615 | */ |
4616 | return nfserr_bad_stateid; | |
4617 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4618 | if (status) | |
4619 | return status; | |
4620 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4621 | } |
4622 | ||
1da177e4 LT |
4623 | /* |
4624 | * Checks for sequence id mutating operations. | |
4625 | */ | |
b37ad28b | 4626 | static __be32 |
dd453dfd | 4627 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4628 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4629 | struct nfs4_ol_stateid **stpp, |
4630 | struct nfsd_net *nn) | |
1da177e4 | 4631 | { |
0836f587 | 4632 | __be32 status; |
38c2f4b1 | 4633 | struct nfs4_stid *s; |
e17f99b7 | 4634 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4635 | |
8c10cbdb BH |
4636 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4637 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4638 | |
1da177e4 | 4639 | *stpp = NULL; |
2dd6e458 | 4640 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4641 | if (status) |
4642 | return status; | |
e17f99b7 | 4643 | stp = openlockstateid(s); |
58fb12e6 | 4644 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4645 | |
e17f99b7 | 4646 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4647 | if (!status) |
e17f99b7 | 4648 | *stpp = stp; |
fd911011 TM |
4649 | else |
4650 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4651 | return status; |
c0a5d93e | 4652 | } |
39325bd0 | 4653 | |
3320fef1 SK |
4654 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4655 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4656 | { |
4657 | __be32 status; | |
4658 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4659 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4660 | |
c0a5d93e | 4661 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4662 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4663 | if (status) |
4664 | return status; | |
4cbfc9f7 TM |
4665 | oo = openowner(stp->st_stateowner); |
4666 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4667 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4668 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4669 | } |
4670 | *stpp = stp; | |
3a4f98bb | 4671 | return nfs_ok; |
1da177e4 LT |
4672 | } |
4673 | ||
b37ad28b | 4674 | __be32 |
ca364317 | 4675 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4676 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4677 | { |
b37ad28b | 4678 | __be32 status; |
fe0750e5 | 4679 | struct nfs4_openowner *oo; |
dcef0413 | 4680 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4681 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4682 | |
a6a9f18f AV |
4683 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4684 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4685 | |
ca364317 | 4686 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4687 | if (status) |
4688 | return status; | |
1da177e4 LT |
4689 | |
4690 | nfs4_lock_state(); | |
4691 | ||
9072d5c6 | 4692 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4693 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4694 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4695 | if (status) |
68b66e82 | 4696 | goto out; |
fe0750e5 | 4697 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4698 | status = nfserr_bad_stateid; |
dad1c067 | 4699 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4700 | goto put_stateid; |
dad1c067 | 4701 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4702 | update_stateid(&stp->st_stid.sc_stateid); |
4703 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4704 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4705 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4706 | |
2a4317c5 | 4707 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4708 | status = nfs_ok; |
2585fc79 TM |
4709 | put_stateid: |
4710 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4711 | out: |
9411b1d4 | 4712 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4713 | nfs4_unlock_state(); |
1da177e4 LT |
4714 | return status; |
4715 | } | |
4716 | ||
6409a5a6 | 4717 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4718 | { |
82c5ff1b | 4719 | if (!test_access(access, stp)) |
6409a5a6 | 4720 | return; |
11b9164a | 4721 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4722 | clear_access(access, stp); |
6409a5a6 | 4723 | } |
f197c271 | 4724 | |
6409a5a6 BF |
4725 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4726 | { | |
4727 | switch (to_access) { | |
4728 | case NFS4_SHARE_ACCESS_READ: | |
4729 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4730 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4731 | break; | |
4732 | case NFS4_SHARE_ACCESS_WRITE: | |
4733 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4734 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4735 | break; | |
4736 | case NFS4_SHARE_ACCESS_BOTH: | |
4737 | break; | |
4738 | default: | |
063b0fb9 | 4739 | WARN_ON_ONCE(1); |
1da177e4 LT |
4740 | } |
4741 | } | |
4742 | ||
b37ad28b | 4743 | __be32 |
ca364317 BF |
4744 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4745 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4746 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4747 | { |
b37ad28b | 4748 | __be32 status; |
dcef0413 | 4749 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4750 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4751 | |
a6a9f18f AV |
4752 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4753 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4754 | |
c30e92df | 4755 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4756 | if (od->od_deleg_want) |
4757 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4758 | od->od_deleg_want); | |
1da177e4 LT |
4759 | |
4760 | nfs4_lock_state(); | |
c0a5d93e | 4761 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4762 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4763 | if (status) |
1da177e4 | 4764 | goto out; |
1da177e4 | 4765 | status = nfserr_inval; |
82c5ff1b | 4766 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4767 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4768 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4769 | goto put_stateid; |
1da177e4 | 4770 | } |
ce0fc43c | 4771 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4772 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4773 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4774 | goto put_stateid; |
1da177e4 | 4775 | } |
6409a5a6 | 4776 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4777 | |
ce0fc43c | 4778 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4779 | |
dcef0413 BF |
4780 | update_stateid(&stp->st_stid.sc_stateid); |
4781 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4782 | status = nfs_ok; |
0667b1e9 TM |
4783 | put_stateid: |
4784 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4785 | out: |
9411b1d4 | 4786 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4787 | nfs4_unlock_state(); |
1da177e4 LT |
4788 | return status; |
4789 | } | |
4790 | ||
f7a4d872 BF |
4791 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4792 | { | |
acf9295b | 4793 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4794 | LIST_HEAD(reaplist); |
acf9295b | 4795 | |
f7a4d872 | 4796 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4797 | spin_lock(&clp->cl_lock); |
d83017f9 | 4798 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4799 | |
d83017f9 JL |
4800 | if (clp->cl_minorversion) { |
4801 | put_ol_stateid_locked(s, &reaplist); | |
4802 | spin_unlock(&clp->cl_lock); | |
4803 | free_ol_stateid_reaplist(&reaplist); | |
4804 | } else { | |
4805 | spin_unlock(&clp->cl_lock); | |
4806 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4807 | move_to_close_lru(s, clp->net); |
d83017f9 | 4808 | } |
38c387b5 BF |
4809 | } |
4810 | ||
1da177e4 LT |
4811 | /* |
4812 | * nfs4_unlock_state() called after encode | |
4813 | */ | |
b37ad28b | 4814 | __be32 |
ca364317 | 4815 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4816 | struct nfsd4_close *close) |
1da177e4 | 4817 | { |
b37ad28b | 4818 | __be32 status; |
dcef0413 | 4819 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4820 | struct net *net = SVC_NET(rqstp); |
4821 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4822 | |
a6a9f18f AV |
4823 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4824 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4825 | |
4826 | nfs4_lock_state(); | |
f7a4d872 BF |
4827 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4828 | &close->cl_stateid, | |
4829 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4830 | &stp, nn); |
9411b1d4 | 4831 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4832 | if (status) |
1da177e4 | 4833 | goto out; |
dcef0413 BF |
4834 | update_stateid(&stp->st_stid.sc_stateid); |
4835 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4836 | |
f7a4d872 | 4837 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4838 | |
4839 | /* put reference from nfs4_preprocess_seqid_op */ | |
4840 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4841 | out: |
58fb12e6 | 4842 | nfs4_unlock_state(); |
1da177e4 LT |
4843 | return status; |
4844 | } | |
4845 | ||
b37ad28b | 4846 | __be32 |
ca364317 BF |
4847 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4848 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4849 | { |
203a8c8e BF |
4850 | struct nfs4_delegation *dp; |
4851 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4852 | struct nfs4_stid *s; |
b37ad28b | 4853 | __be32 status; |
3320fef1 | 4854 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4855 | |
ca364317 | 4856 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4857 | return status; |
1da177e4 LT |
4858 | |
4859 | nfs4_lock_state(); | |
2dd6e458 | 4860 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4861 | if (status) |
203a8c8e | 4862 | goto out; |
38c2f4b1 | 4863 | dp = delegstateid(s); |
d5477a8d | 4864 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4865 | if (status) |
fd911011 | 4866 | goto put_stateid; |
203a8c8e | 4867 | |
3bd64a5b | 4868 | destroy_delegation(dp); |
fd911011 TM |
4869 | put_stateid: |
4870 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4871 | out: |
203a8c8e BF |
4872 | nfs4_unlock_state(); |
4873 | ||
1da177e4 LT |
4874 | return status; |
4875 | } | |
4876 | ||
4877 | ||
1da177e4 | 4878 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4879 | |
87df4de8 BH |
4880 | static inline u64 |
4881 | end_offset(u64 start, u64 len) | |
4882 | { | |
4883 | u64 end; | |
4884 | ||
4885 | end = start + len; | |
4886 | return end >= start ? end: NFS4_MAX_UINT64; | |
4887 | } | |
4888 | ||
4889 | /* last octet in a range */ | |
4890 | static inline u64 | |
4891 | last_byte_offset(u64 start, u64 len) | |
4892 | { | |
4893 | u64 end; | |
4894 | ||
063b0fb9 | 4895 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4896 | end = start + len; |
4897 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4898 | } | |
4899 | ||
1da177e4 LT |
4900 | /* |
4901 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4902 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4903 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4904 | * locking, this prevents us from being completely protocol-compliant. The | |
4905 | * real solution to this problem is to start using unsigned file offsets in | |
4906 | * the VFS, but this is a very deep change! | |
4907 | */ | |
4908 | static inline void | |
4909 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4910 | { | |
4911 | if (lock->fl_start < 0) | |
4912 | lock->fl_start = OFFSET_MAX; | |
4913 | if (lock->fl_end < 0) | |
4914 | lock->fl_end = OFFSET_MAX; | |
4915 | } | |
4916 | ||
d5b9026a N |
4917 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4918 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4919 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4920 | }; |
1da177e4 LT |
4921 | |
4922 | static inline void | |
4923 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4924 | { | |
fe0750e5 | 4925 | struct nfs4_lockowner *lo; |
1da177e4 | 4926 | |
d5b9026a | 4927 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4928 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4929 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4930 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4931 | if (!deny->ld_owner.data) |
4932 | /* We just don't care that much */ | |
4933 | goto nevermind; | |
fe0750e5 BF |
4934 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4935 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4936 | } else { |
7c13f344 BF |
4937 | nevermind: |
4938 | deny->ld_owner.len = 0; | |
4939 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4940 | deny->ld_clientid.cl_boot = 0; |
4941 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4942 | } |
4943 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4944 | deny->ld_length = NFS4_MAX_UINT64; |
4945 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4946 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4947 | deny->ld_type = NFS4_READ_LT; | |
4948 | if (fl->fl_type != F_RDLCK) | |
4949 | deny->ld_type = NFS4_WRITE_LT; | |
4950 | } | |
4951 | ||
fe0750e5 | 4952 | static struct nfs4_lockowner * |
c58c6610 | 4953 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4954 | struct nfs4_client *clp) |
1da177e4 | 4955 | { |
d4f0489f | 4956 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4957 | struct nfs4_stateowner *so; |
1da177e4 | 4958 | |
0a880a28 TM |
4959 | lockdep_assert_held(&clp->cl_lock); |
4960 | ||
d4f0489f TM |
4961 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4962 | so_strhash) { | |
b3c32bcd TM |
4963 | if (so->so_is_open_owner) |
4964 | continue; | |
d4f0489f | 4965 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4966 | continue; |
5db1c03f | 4967 | atomic_inc(&so->so_count); |
b3c32bcd | 4968 | return lockowner(so); |
1da177e4 LT |
4969 | } |
4970 | return NULL; | |
4971 | } | |
4972 | ||
c58c6610 TM |
4973 | static struct nfs4_lockowner * |
4974 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4975 | struct nfs4_client *clp) |
c58c6610 TM |
4976 | { |
4977 | struct nfs4_lockowner *lo; | |
4978 | ||
d4f0489f TM |
4979 | spin_lock(&clp->cl_lock); |
4980 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4981 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4982 | return lo; |
4983 | } | |
4984 | ||
8f4b54c5 JL |
4985 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
4986 | { | |
c58c6610 | 4987 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
4988 | } |
4989 | ||
6b180f0b JL |
4990 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4991 | { | |
4992 | struct nfs4_lockowner *lo = lockowner(sop); | |
4993 | ||
4994 | kmem_cache_free(lockowner_slab, lo); | |
4995 | } | |
4996 | ||
4997 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
4998 | .so_unhash = nfs4_unhash_lockowner, |
4999 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5000 | }; |
5001 | ||
1da177e4 LT |
5002 | /* |
5003 | * Alloc a lock owner structure. | |
5004 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5005 | * occurred. |
1da177e4 | 5006 | * |
16bfdaaf | 5007 | * strhashval = ownerstr_hashval |
1da177e4 | 5008 | */ |
fe0750e5 | 5009 | static struct nfs4_lockowner * |
c58c6610 TM |
5010 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5011 | struct nfs4_ol_stateid *open_stp, | |
5012 | struct nfsd4_lock *lock) | |
5013 | { | |
c58c6610 | 5014 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5015 | |
fe0750e5 BF |
5016 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5017 | if (!lo) | |
1da177e4 | 5018 | return NULL; |
fe0750e5 BF |
5019 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5020 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5021 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5022 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5023 | spin_lock(&clp->cl_lock); |
c58c6610 | 5024 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 5025 | &lock->lk_new_owner, clp); |
c58c6610 TM |
5026 | if (ret == NULL) { |
5027 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5028 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5029 | ret = lo; |
5030 | } else | |
5031 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 5032 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 5033 | return lo; |
1da177e4 LT |
5034 | } |
5035 | ||
356a95ec JL |
5036 | static void |
5037 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5038 | struct nfs4_file *fp, struct inode *inode, | |
5039 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5040 | { |
d3b313a4 | 5041 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5042 | |
356a95ec JL |
5043 | lockdep_assert_held(&clp->cl_lock); |
5044 | ||
3d0fabd5 | 5045 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5046 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 5047 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 5048 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 5049 | get_nfs4_file(fp); |
11b9164a | 5050 | stp->st_stid.sc_file = fp; |
b49e084d | 5051 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5052 | stp->st_access_bmap = 0; |
1da177e4 | 5053 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5054 | stp->st_openstp = open_stp; |
3c87b9b7 | 5055 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5056 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5057 | spin_lock(&fp->fi_lock); |
5058 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5059 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5060 | } |
5061 | ||
c53530da JL |
5062 | static struct nfs4_ol_stateid * |
5063 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5064 | { | |
5065 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5066 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5067 | ||
5068 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5069 | |
5070 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5071 | if (lst->st_stid.sc_file == fp) { |
5072 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5073 | return lst; |
3d0fabd5 | 5074 | } |
c53530da JL |
5075 | } |
5076 | return NULL; | |
5077 | } | |
5078 | ||
356a95ec JL |
5079 | static struct nfs4_ol_stateid * |
5080 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5081 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5082 | bool *new) | |
5083 | { | |
5084 | struct nfs4_stid *ns = NULL; | |
5085 | struct nfs4_ol_stateid *lst; | |
5086 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5087 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5088 | ||
5089 | spin_lock(&clp->cl_lock); | |
5090 | lst = find_lock_stateid(lo, fi); | |
5091 | if (lst == NULL) { | |
5092 | spin_unlock(&clp->cl_lock); | |
5093 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5094 | if (ns == NULL) | |
5095 | return NULL; | |
5096 | ||
5097 | spin_lock(&clp->cl_lock); | |
5098 | lst = find_lock_stateid(lo, fi); | |
5099 | if (likely(!lst)) { | |
5100 | lst = openlockstateid(ns); | |
5101 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5102 | ns = NULL; | |
5103 | *new = true; | |
5104 | } | |
5105 | } | |
5106 | spin_unlock(&clp->cl_lock); | |
5107 | if (ns) | |
5108 | nfs4_put_stid(ns); | |
5109 | return lst; | |
5110 | } | |
c53530da | 5111 | |
fd39ca9a | 5112 | static int |
1da177e4 LT |
5113 | check_lock_length(u64 offset, u64 length) |
5114 | { | |
87df4de8 | 5115 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5116 | LOFF_OVERFLOW(offset, length))); |
5117 | } | |
5118 | ||
dcef0413 | 5119 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5120 | { |
11b9164a | 5121 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5122 | |
7214e860 JL |
5123 | lockdep_assert_held(&fp->fi_lock); |
5124 | ||
82c5ff1b | 5125 | if (test_access(access, lock_stp)) |
0997b173 | 5126 | return; |
12659651 | 5127 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5128 | set_access(access, lock_stp); |
0997b173 BF |
5129 | } |
5130 | ||
356a95ec JL |
5131 | static __be32 |
5132 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5133 | struct nfs4_ol_stateid *ost, | |
5134 | struct nfsd4_lock *lock, | |
5135 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5136 | { |
5db1c03f | 5137 | __be32 status; |
11b9164a | 5138 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5139 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5140 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5141 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5142 | struct nfs4_lockowner *lo; |
5143 | unsigned int strhashval; | |
5144 | ||
d4f0489f | 5145 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5146 | if (!lo) { |
d4f0489f | 5147 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5148 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5149 | if (lo == NULL) | |
5150 | return nfserr_jukebox; | |
5151 | } else { | |
5152 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5153 | status = nfserr_bad_seqid; |
c53530da JL |
5154 | if (!cstate->minorversion && |
5155 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5156 | goto out; |
64a284d0 | 5157 | } |
c53530da | 5158 | |
356a95ec | 5159 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5160 | if (*lst == NULL) { |
5db1c03f JL |
5161 | status = nfserr_jukebox; |
5162 | goto out; | |
64a284d0 | 5163 | } |
5db1c03f JL |
5164 | status = nfs_ok; |
5165 | out: | |
5166 | nfs4_put_stateowner(&lo->lo_owner); | |
5167 | return status; | |
64a284d0 BF |
5168 | } |
5169 | ||
1da177e4 LT |
5170 | /* |
5171 | * LOCK operation | |
5172 | */ | |
b37ad28b | 5173 | __be32 |
ca364317 | 5174 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5175 | struct nfsd4_lock *lock) |
1da177e4 | 5176 | { |
fe0750e5 BF |
5177 | struct nfs4_openowner *open_sop = NULL; |
5178 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5179 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5180 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5181 | struct nfs4_file *fp; |
7d947842 | 5182 | struct file *filp = NULL; |
21179d81 JL |
5183 | struct file_lock *file_lock = NULL; |
5184 | struct file_lock *conflock = NULL; | |
b37ad28b | 5185 | __be32 status = 0; |
b34f27aa | 5186 | int lkflg; |
b8dd7b9a | 5187 | int err; |
5db1c03f | 5188 | bool new = false; |
3320fef1 SK |
5189 | struct net *net = SVC_NET(rqstp); |
5190 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5191 | |
5192 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5193 | (long long) lock->lk_offset, | |
5194 | (long long) lock->lk_length); | |
5195 | ||
1da177e4 LT |
5196 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5197 | return nfserr_inval; | |
5198 | ||
ca364317 | 5199 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5200 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5201 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5202 | return status; | |
5203 | } | |
5204 | ||
1da177e4 LT |
5205 | nfs4_lock_state(); |
5206 | ||
5207 | if (lock->lk_is_new) { | |
684e5638 BF |
5208 | if (nfsd4_has_session(cstate)) |
5209 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5210 | memcpy(&lock->v.new.clientid, | |
5211 | &cstate->session->se_client->cl_clientid, | |
5212 | sizeof(clientid_t)); | |
5213 | ||
1da177e4 | 5214 | status = nfserr_stale_clientid; |
2c142baa | 5215 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5216 | goto out; |
1da177e4 | 5217 | |
1da177e4 | 5218 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5219 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5220 | lock->lk_new_open_seqid, |
5221 | &lock->lk_new_open_stateid, | |
3320fef1 | 5222 | &open_stp, nn); |
37515177 | 5223 | if (status) |
1da177e4 | 5224 | goto out; |
fe0750e5 | 5225 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5226 | status = nfserr_bad_stateid; |
684e5638 | 5227 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5228 | &lock->v.new.clientid)) |
5229 | goto out; | |
64a284d0 | 5230 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5231 | &lock_stp, &new); |
3d0fabd5 | 5232 | } else { |
dd453dfd | 5233 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5234 | lock->lk_old_lock_seqid, |
5235 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5236 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5237 | } |
e1aaa891 BF |
5238 | if (status) |
5239 | goto out; | |
64a284d0 | 5240 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5241 | |
b34f27aa BF |
5242 | lkflg = setlkflg(lock->lk_type); |
5243 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5244 | if (status) | |
5245 | goto out; | |
5246 | ||
0dd395dc | 5247 | status = nfserr_grace; |
3320fef1 | 5248 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5249 | goto out; |
5250 | status = nfserr_no_grace; | |
3320fef1 | 5251 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5252 | goto out; |
5253 | ||
21179d81 JL |
5254 | file_lock = locks_alloc_lock(); |
5255 | if (!file_lock) { | |
5256 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5257 | status = nfserr_jukebox; | |
5258 | goto out; | |
5259 | } | |
5260 | ||
11b9164a | 5261 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5262 | locks_init_lock(file_lock); |
1da177e4 LT |
5263 | switch (lock->lk_type) { |
5264 | case NFS4_READ_LT: | |
5265 | case NFS4_READW_LT: | |
7214e860 JL |
5266 | spin_lock(&fp->fi_lock); |
5267 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5268 | if (filp) |
5269 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5270 | spin_unlock(&fp->fi_lock); |
21179d81 | 5271 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5272 | break; |
1da177e4 LT |
5273 | case NFS4_WRITE_LT: |
5274 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5275 | spin_lock(&fp->fi_lock); |
5276 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5277 | if (filp) |
5278 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5279 | spin_unlock(&fp->fi_lock); |
21179d81 | 5280 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5281 | break; |
1da177e4 LT |
5282 | default: |
5283 | status = nfserr_inval; | |
5284 | goto out; | |
5285 | } | |
f9d7562f BF |
5286 | if (!filp) { |
5287 | status = nfserr_openmode; | |
5288 | goto out; | |
5289 | } | |
21179d81 JL |
5290 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5291 | file_lock->fl_pid = current->tgid; | |
5292 | file_lock->fl_file = filp; | |
5293 | file_lock->fl_flags = FL_POSIX; | |
5294 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5295 | file_lock->fl_start = lock->lk_offset; | |
5296 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5297 | nfs4_transform_lock_offset(file_lock); | |
5298 | ||
5299 | conflock = locks_alloc_lock(); | |
5300 | if (!conflock) { | |
5301 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5302 | status = nfserr_jukebox; | |
5303 | goto out; | |
5304 | } | |
1da177e4 | 5305 | |
21179d81 | 5306 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5307 | switch (-err) { |
1da177e4 | 5308 | case 0: /* success! */ |
dcef0413 BF |
5309 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5310 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5311 | sizeof(stateid_t)); |
b8dd7b9a | 5312 | status = 0; |
eb76b3fd AA |
5313 | break; |
5314 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5315 | status = nfserr_denied; | |
5316 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5317 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5318 | break; |
1da177e4 LT |
5319 | case (EDEADLK): |
5320 | status = nfserr_deadlock; | |
eb76b3fd | 5321 | break; |
3e772463 | 5322 | default: |
fd85b817 | 5323 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5324 | status = nfserrno(err); |
eb76b3fd | 5325 | break; |
1da177e4 | 5326 | } |
1da177e4 | 5327 | out: |
de18643d TM |
5328 | if (filp) |
5329 | fput(filp); | |
5db1c03f JL |
5330 | if (lock_stp) { |
5331 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5332 | if (cstate->replay_owner && | |
5333 | cstate->replay_owner != &lock_sop->lo_owner && | |
5334 | seqid_mutating_err(ntohl(status))) | |
5335 | lock_sop->lo_owner.so_seqid++; | |
5336 | ||
5337 | /* | |
5338 | * If this is a new, never-before-used stateid, and we are | |
5339 | * returning an error, then just go ahead and release it. | |
5340 | */ | |
5341 | if (status && new) | |
5342 | release_lock_stateid(lock_stp); | |
5343 | ||
3d0fabd5 | 5344 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5345 | } |
0667b1e9 TM |
5346 | if (open_stp) |
5347 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5348 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5349 | nfs4_unlock_state(); |
21179d81 JL |
5350 | if (file_lock) |
5351 | locks_free_lock(file_lock); | |
5352 | if (conflock) | |
5353 | locks_free_lock(conflock); | |
1da177e4 LT |
5354 | return status; |
5355 | } | |
5356 | ||
55ef1274 BF |
5357 | /* |
5358 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5359 | * so we do a temporary open here just to get an open file to pass to | |
5360 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5361 | * inode operation.) | |
5362 | */ | |
04da6e9d | 5363 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5364 | { |
5365 | struct file *file; | |
04da6e9d AV |
5366 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5367 | if (!err) { | |
5368 | err = nfserrno(vfs_test_lock(file, lock)); | |
5369 | nfsd_close(file); | |
5370 | } | |
55ef1274 BF |
5371 | return err; |
5372 | } | |
5373 | ||
1da177e4 LT |
5374 | /* |
5375 | * LOCKT operation | |
5376 | */ | |
b37ad28b | 5377 | __be32 |
ca364317 BF |
5378 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5379 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5380 | { |
21179d81 | 5381 | struct file_lock *file_lock = NULL; |
5db1c03f | 5382 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5383 | __be32 status; |
7f2210fa | 5384 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5385 | |
5ccb0066 | 5386 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5387 | return nfserr_grace; |
5388 | ||
5389 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5390 | return nfserr_inval; | |
5391 | ||
1da177e4 LT |
5392 | nfs4_lock_state(); |
5393 | ||
9b2ef62b | 5394 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5395 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5396 | if (status) |
5397 | goto out; | |
5398 | } | |
1da177e4 | 5399 | |
75c096f7 | 5400 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5401 | goto out; |
1da177e4 | 5402 | |
21179d81 JL |
5403 | file_lock = locks_alloc_lock(); |
5404 | if (!file_lock) { | |
5405 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5406 | status = nfserr_jukebox; | |
5407 | goto out; | |
5408 | } | |
5409 | locks_init_lock(file_lock); | |
1da177e4 LT |
5410 | switch (lockt->lt_type) { |
5411 | case NFS4_READ_LT: | |
5412 | case NFS4_READW_LT: | |
21179d81 | 5413 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5414 | break; |
5415 | case NFS4_WRITE_LT: | |
5416 | case NFS4_WRITEW_LT: | |
21179d81 | 5417 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5418 | break; |
5419 | default: | |
2fdada03 | 5420 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5421 | status = nfserr_inval; |
5422 | goto out; | |
5423 | } | |
5424 | ||
d4f0489f TM |
5425 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5426 | cstate->clp); | |
fe0750e5 | 5427 | if (lo) |
21179d81 JL |
5428 | file_lock->fl_owner = (fl_owner_t)lo; |
5429 | file_lock->fl_pid = current->tgid; | |
5430 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5431 | |
21179d81 JL |
5432 | file_lock->fl_start = lockt->lt_offset; |
5433 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5434 | |
21179d81 | 5435 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5436 | |
21179d81 | 5437 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5438 | if (status) |
fd85b817 | 5439 | goto out; |
04da6e9d | 5440 | |
21179d81 | 5441 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5442 | status = nfserr_denied; |
21179d81 | 5443 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5444 | } |
5445 | out: | |
5db1c03f JL |
5446 | if (lo) |
5447 | nfs4_put_stateowner(&lo->lo_owner); | |
1da177e4 | 5448 | nfs4_unlock_state(); |
21179d81 JL |
5449 | if (file_lock) |
5450 | locks_free_lock(file_lock); | |
1da177e4 LT |
5451 | return status; |
5452 | } | |
5453 | ||
b37ad28b | 5454 | __be32 |
ca364317 | 5455 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5456 | struct nfsd4_locku *locku) |
1da177e4 | 5457 | { |
dcef0413 | 5458 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5459 | struct file *filp = NULL; |
21179d81 | 5460 | struct file_lock *file_lock = NULL; |
b37ad28b | 5461 | __be32 status; |
b8dd7b9a | 5462 | int err; |
3320fef1 SK |
5463 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5464 | ||
1da177e4 LT |
5465 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5466 | (long long) locku->lu_offset, | |
5467 | (long long) locku->lu_length); | |
5468 | ||
5469 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5470 | return nfserr_inval; | |
5471 | ||
5472 | nfs4_lock_state(); | |
5473 | ||
9072d5c6 | 5474 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5475 | &locku->lu_stateid, NFS4_LOCK_STID, |
5476 | &stp, nn); | |
9072d5c6 | 5477 | if (status) |
1da177e4 | 5478 | goto out; |
11b9164a | 5479 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5480 | if (!filp) { |
5481 | status = nfserr_lock_range; | |
858cc573 | 5482 | goto put_stateid; |
f9d7562f | 5483 | } |
21179d81 JL |
5484 | file_lock = locks_alloc_lock(); |
5485 | if (!file_lock) { | |
5486 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5487 | status = nfserr_jukebox; | |
de18643d | 5488 | goto fput; |
21179d81 JL |
5489 | } |
5490 | locks_init_lock(file_lock); | |
5491 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5492 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5493 | file_lock->fl_pid = current->tgid; |
5494 | file_lock->fl_file = filp; | |
5495 | file_lock->fl_flags = FL_POSIX; | |
5496 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5497 | file_lock->fl_start = locku->lu_offset; | |
5498 | ||
5499 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5500 | locku->lu_length); | |
5501 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5502 | |
21179d81 | 5503 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5504 | if (err) { |
fd85b817 | 5505 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5506 | goto out_nfserr; |
5507 | } | |
dcef0413 BF |
5508 | update_stateid(&stp->st_stid.sc_stateid); |
5509 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5510 | fput: |
5511 | fput(filp); | |
858cc573 TM |
5512 | put_stateid: |
5513 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5514 | out: |
9411b1d4 | 5515 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5516 | nfs4_unlock_state(); |
21179d81 JL |
5517 | if (file_lock) |
5518 | locks_free_lock(file_lock); | |
1da177e4 LT |
5519 | return status; |
5520 | ||
5521 | out_nfserr: | |
b8dd7b9a | 5522 | status = nfserrno(err); |
de18643d | 5523 | goto fput; |
1da177e4 LT |
5524 | } |
5525 | ||
5526 | /* | |
5527 | * returns | |
f9c00c3a JL |
5528 | * true: locks held by lockowner |
5529 | * false: no locks held by lockowner | |
1da177e4 | 5530 | */ |
f9c00c3a JL |
5531 | static bool |
5532 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5533 | { |
5534 | struct file_lock **flpp; | |
f9c00c3a JL |
5535 | int status = false; |
5536 | struct file *filp = find_any_file(fp); | |
5537 | struct inode *inode; | |
5538 | ||
5539 | if (!filp) { | |
5540 | /* Any valid lock stateid should have some sort of access */ | |
5541 | WARN_ON_ONCE(1); | |
5542 | return status; | |
5543 | } | |
5544 | ||
5545 | inode = file_inode(filp); | |
1da177e4 | 5546 | |
1c8c601a | 5547 | spin_lock(&inode->i_lock); |
1da177e4 | 5548 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5549 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5550 | status = true; |
5551 | break; | |
796dadfd | 5552 | } |
1da177e4 | 5553 | } |
1c8c601a | 5554 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5555 | fput(filp); |
1da177e4 LT |
5556 | return status; |
5557 | } | |
5558 | ||
b37ad28b | 5559 | __be32 |
b591480b BF |
5560 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5561 | struct nfsd4_compound_state *cstate, | |
5562 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5563 | { |
5564 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5565 | struct nfs4_stateowner *sop; |
5566 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5567 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5568 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5569 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5570 | __be32 status; |
7f2210fa | 5571 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5572 | struct nfs4_client *clp; |
1da177e4 LT |
5573 | |
5574 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5575 | clid->cl_boot, clid->cl_id); | |
5576 | ||
1da177e4 LT |
5577 | nfs4_lock_state(); |
5578 | ||
4b24ca7d | 5579 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5580 | if (status) |
5581 | goto out; | |
5582 | ||
d4f0489f | 5583 | clp = cstate->clp; |
fd44907c | 5584 | /* Find the matching lock stateowner */ |
d4f0489f | 5585 | spin_lock(&clp->cl_lock); |
882e9d25 | 5586 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5587 | so_strhash) { |
fd44907c | 5588 | |
882e9d25 JL |
5589 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5590 | continue; | |
fd44907c | 5591 | |
882e9d25 JL |
5592 | /* see if there are still any locks associated with it */ |
5593 | lo = lockowner(sop); | |
5594 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5595 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5596 | status = nfserr_locks_held; | |
5597 | spin_unlock(&clp->cl_lock); | |
5598 | goto out; | |
5599 | } | |
5adfd885 | 5600 | } |
882e9d25 JL |
5601 | |
5602 | atomic_inc(&sop->so_count); | |
5603 | break; | |
1da177e4 | 5604 | } |
c58c6610 | 5605 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5606 | if (lo) |
5607 | release_lockowner(lo); | |
1da177e4 LT |
5608 | out: |
5609 | nfs4_unlock_state(); | |
5610 | return status; | |
5611 | } | |
5612 | ||
5613 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5614 | alloc_reclaim(void) |
1da177e4 | 5615 | { |
a55370a3 | 5616 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5617 | } |
5618 | ||
0ce0c2b5 | 5619 | bool |
52e19c09 | 5620 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5621 | { |
0ce0c2b5 | 5622 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5623 | |
52e19c09 | 5624 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5625 | return (crp && crp->cr_clp); |
c7b9a459 N |
5626 | } |
5627 | ||
1da177e4 LT |
5628 | /* |
5629 | * failure => all reset bets are off, nfserr_no_grace... | |
5630 | */ | |
772a9bbb | 5631 | struct nfs4_client_reclaim * |
52e19c09 | 5632 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5633 | { |
5634 | unsigned int strhashval; | |
772a9bbb | 5635 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5636 | |
a55370a3 N |
5637 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5638 | crp = alloc_reclaim(); | |
772a9bbb JL |
5639 | if (crp) { |
5640 | strhashval = clientstr_hashval(name); | |
5641 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5642 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5643 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5644 | crp->cr_clp = NULL; |
52e19c09 | 5645 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5646 | } |
5647 | return crp; | |
1da177e4 LT |
5648 | } |
5649 | ||
ce30e539 | 5650 | void |
52e19c09 | 5651 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5652 | { |
5653 | list_del(&crp->cr_strhash); | |
5654 | kfree(crp); | |
52e19c09 | 5655 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5656 | } |
5657 | ||
2a4317c5 | 5658 | void |
52e19c09 | 5659 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5660 | { |
5661 | struct nfs4_client_reclaim *crp = NULL; | |
5662 | int i; | |
5663 | ||
1da177e4 | 5664 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5665 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5666 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5667 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5668 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5669 | } |
5670 | } | |
063b0fb9 | 5671 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5672 | } |
5673 | ||
5674 | /* | |
5675 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5676 | struct nfs4_client_reclaim * |
52e19c09 | 5677 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5678 | { |
5679 | unsigned int strhashval; | |
1da177e4 LT |
5680 | struct nfs4_client_reclaim *crp = NULL; |
5681 | ||
278c931c | 5682 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5683 | |
278c931c | 5684 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5685 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5686 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5687 | return crp; |
5688 | } | |
5689 | } | |
5690 | return NULL; | |
5691 | } | |
5692 | ||
5693 | /* | |
5694 | * Called from OPEN. Look for clientid in reclaim list. | |
5695 | */ | |
b37ad28b | 5696 | __be32 |
0fe492db TM |
5697 | nfs4_check_open_reclaim(clientid_t *clid, |
5698 | struct nfsd4_compound_state *cstate, | |
5699 | struct nfsd_net *nn) | |
1da177e4 | 5700 | { |
0fe492db | 5701 | __be32 status; |
a52d726b JL |
5702 | |
5703 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5704 | status = lookup_clientid(clid, cstate, nn); |
5705 | if (status) | |
a52d726b JL |
5706 | return nfserr_reclaim_bad; |
5707 | ||
0fe492db TM |
5708 | if (nfsd4_client_record_check(cstate->clp)) |
5709 | return nfserr_reclaim_bad; | |
5710 | ||
5711 | return nfs_ok; | |
1da177e4 LT |
5712 | } |
5713 | ||
65178db4 BS |
5714 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5715 | ||
44e34da6 BS |
5716 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5717 | { | |
d20c11d8 JL |
5718 | __be32 ret; |
5719 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
5720 | ||
5721 | spin_lock(&nn->client_lock); | |
5722 | ret = mark_client_expired_locked(clp); | |
5723 | spin_unlock(&nn->client_lock); | |
5724 | if (ret != nfs_ok) | |
221a6876 | 5725 | return 0; |
44e34da6 BS |
5726 | expire_client(clp); |
5727 | return 1; | |
5728 | } | |
5729 | ||
184c1847 BS |
5730 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5731 | { | |
5732 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5733 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5734 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5735 | return 1; | |
5736 | } | |
5737 | ||
5738 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5739 | const char *type) | |
5740 | { | |
5741 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5742 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5743 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5744 | } | |
5745 | ||
3c87b9b7 TM |
5746 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5747 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5748 | { |
5749 | struct nfs4_openowner *oop; | |
fc29171f | 5750 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5751 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5752 | u64 count = 0; |
5753 | ||
5754 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5755 | list_for_each_entry_safe(stp, st_next, |
5756 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5757 | list_for_each_entry_safe(lst, lst_next, | |
5758 | &stp->st_locks, st_locks) { | |
fc29171f | 5759 | if (func) |
3c87b9b7 | 5760 | func(lst); |
fc29171f BS |
5761 | if (++count == max) |
5762 | return count; | |
5763 | } | |
5764 | } | |
5765 | } | |
5766 | ||
5767 | return count; | |
5768 | } | |
5769 | ||
5770 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5771 | { | |
3c87b9b7 | 5772 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5773 | } |
5774 | ||
184c1847 BS |
5775 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5776 | { | |
5777 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5778 | nfsd_print_count(clp, count, "locked files"); | |
5779 | return count; | |
5780 | } | |
5781 | ||
4dbdbda8 BS |
5782 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5783 | { | |
5784 | struct nfs4_openowner *oop, *next; | |
5785 | u64 count = 0; | |
5786 | ||
5787 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5788 | if (func) | |
5789 | func(oop); | |
5790 | if (++count == max) | |
5791 | break; | |
5792 | } | |
5793 | ||
5794 | return count; | |
5795 | } | |
5796 | ||
5797 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5798 | { | |
5799 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5800 | } | |
5801 | ||
184c1847 BS |
5802 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5803 | { | |
5804 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5805 | nfsd_print_count(clp, count, "open files"); | |
5806 | return count; | |
5807 | } | |
5808 | ||
269de30f BS |
5809 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5810 | struct list_head *victims) | |
5811 | { | |
5812 | struct nfs4_delegation *dp, *next; | |
5813 | u64 count = 0; | |
5814 | ||
cdc97505 | 5815 | lockdep_assert_held(&state_lock); |
269de30f | 5816 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5817 | if (victims) { |
5818 | /* | |
5819 | * It's not safe to mess with delegations that have a | |
5820 | * non-zero dl_time. They might have already been broken | |
5821 | * and could be processed by the laundromat outside of | |
5822 | * the state_lock. Just leave them be. | |
5823 | */ | |
5824 | if (dp->dl_time != 0) | |
5825 | continue; | |
5826 | ||
42690676 JL |
5827 | unhash_delegation_locked(dp); |
5828 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5829 | } |
269de30f BS |
5830 | if (++count == max) |
5831 | break; | |
5832 | } | |
5833 | return count; | |
5834 | } | |
5835 | ||
5836 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5837 | { | |
5838 | struct nfs4_delegation *dp, *next; | |
5839 | LIST_HEAD(victims); | |
5840 | u64 count; | |
5841 | ||
cdc97505 | 5842 | spin_lock(&state_lock); |
269de30f | 5843 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5844 | spin_unlock(&state_lock); |
269de30f | 5845 | |
2d4a532d JL |
5846 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5847 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5848 | revoke_delegation(dp); |
2d4a532d | 5849 | } |
269de30f BS |
5850 | |
5851 | return count; | |
5852 | } | |
5853 | ||
5854 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5855 | { | |
dff1399f | 5856 | struct nfs4_delegation *dp; |
269de30f BS |
5857 | LIST_HEAD(victims); |
5858 | u64 count; | |
5859 | ||
cdc97505 | 5860 | spin_lock(&state_lock); |
269de30f | 5861 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5862 | while (!list_empty(&victims)) { |
5863 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5864 | dl_recall_lru); | |
5865 | list_del_init(&dp->dl_recall_lru); | |
5866 | dp->dl_time = 0; | |
269de30f | 5867 | nfsd_break_one_deleg(dp); |
dff1399f | 5868 | } |
cdc97505 | 5869 | spin_unlock(&state_lock); |
269de30f BS |
5870 | |
5871 | return count; | |
5872 | } | |
5873 | ||
184c1847 BS |
5874 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5875 | { | |
5876 | u64 count = 0; | |
5877 | ||
cdc97505 | 5878 | spin_lock(&state_lock); |
184c1847 | 5879 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5880 | spin_unlock(&state_lock); |
184c1847 BS |
5881 | |
5882 | nfsd_print_count(clp, count, "delegations"); | |
5883 | return count; | |
5884 | } | |
5885 | ||
44e34da6 | 5886 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5887 | { |
5888 | struct nfs4_client *clp, *next; | |
44e34da6 | 5889 | u64 count = 0; |
3320fef1 | 5890 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5891 | |
44e34da6 BS |
5892 | if (!nfsd_netns_ready(nn)) |
5893 | return 0; | |
5894 | ||
5ed58bb2 | 5895 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5896 | count += func(clp, max - count); |
5897 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5898 | break; |
5899 | } | |
65178db4 | 5900 | |
44e34da6 BS |
5901 | return count; |
5902 | } | |
5903 | ||
6c1e82a4 BS |
5904 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5905 | { | |
5906 | struct nfs4_client *clp; | |
5907 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5908 | ||
5909 | if (!nfsd_netns_ready(nn)) | |
5910 | return NULL; | |
5911 | ||
5912 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5913 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5914 | return clp; | |
5915 | } | |
5916 | return NULL; | |
5917 | } | |
5918 | ||
65178db4 BS |
5919 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5920 | ||
c2f1a551 MS |
5921 | /* |
5922 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5923 | * client may quite reasonably hang on to a delegation as long as it has | |
5924 | * the inode cached. This becomes an obvious problem the first time a | |
5925 | * client's inode cache approaches the size of the server's total memory. | |
5926 | * | |
5927 | * For now we avoid this problem by imposing a hard limit on the number | |
5928 | * of delegations, which varies according to the server's memory size. | |
5929 | */ | |
5930 | static void | |
5931 | set_max_delegations(void) | |
5932 | { | |
5933 | /* | |
5934 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5935 | * estimates suggest that in the worst case (where every delegation | |
5936 | * is for a different inode), a delegation could take about 1.5K, | |
5937 | * giving a worst case usage of about 6% of memory. | |
5938 | */ | |
5939 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5940 | } | |
5941 | ||
d85ed443 | 5942 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5943 | { |
5944 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5945 | int i; | |
5946 | ||
5947 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5948 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5949 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5950 | goto err; |
0a7ec377 SK |
5951 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5952 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5953 | if (!nn->unconf_id_hashtbl) | |
5954 | goto err_unconf_id; | |
1872de0e SK |
5955 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5956 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5957 | if (!nn->sessionid_hashtbl) | |
5958 | goto err_sessionid; | |
8daae4dc | 5959 | |
382a62e7 | 5960 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5961 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5962 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5963 | } |
1872de0e SK |
5964 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5965 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5966 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5967 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5968 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5969 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5970 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5971 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5972 | |
09121281 | 5973 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5974 | get_net(net); |
09121281 | 5975 | |
8daae4dc | 5976 | return 0; |
382a62e7 | 5977 | |
1872de0e | 5978 | err_sessionid: |
9b531137 | 5979 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
5980 | err_unconf_id: |
5981 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5982 | err: |
5983 | return -ENOMEM; | |
8daae4dc SK |
5984 | } |
5985 | ||
5986 | static void | |
4dce0ac9 | 5987 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5988 | { |
5989 | int i; | |
5990 | struct nfs4_client *clp = NULL; | |
5991 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5992 | ||
5993 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5994 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5995 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5996 | destroy_client(clp); | |
5997 | } | |
5998 | } | |
a99454aa | 5999 | |
2b905635 KM |
6000 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6001 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6002 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6003 | destroy_client(clp); | |
6004 | } | |
a99454aa SK |
6005 | } |
6006 | ||
1872de0e | 6007 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6008 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6009 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6010 | put_net(net); |
8daae4dc SK |
6011 | } |
6012 | ||
f252bc68 | 6013 | int |
d85ed443 | 6014 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6015 | { |
5e1533c7 | 6016 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6017 | int ret; |
6018 | ||
d85ed443 | 6019 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6020 | if (ret) |
6021 | return ret; | |
5e1533c7 | 6022 | nfsd4_client_tracking_init(net); |
2c142baa | 6023 | nn->boot_time = get_seconds(); |
5ccb0066 | 6024 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 6025 | nn->grace_ended = false; |
d85ed443 | 6026 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6027 | nn->nfsd4_grace, net); |
6028 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6029 | return 0; |
6030 | } | |
6031 | ||
6032 | /* initialization to perform when the nfsd service is started: */ | |
6033 | ||
6034 | int | |
6035 | nfs4_state_start(void) | |
6036 | { | |
6037 | int ret; | |
6038 | ||
b5a1a81e | 6039 | ret = set_callback_cred(); |
d85ed443 SK |
6040 | if (ret) |
6041 | return -ENOMEM; | |
58da282b | 6042 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6043 | if (laundry_wq == NULL) { |
6044 | ret = -ENOMEM; | |
6045 | goto out_recovery; | |
6046 | } | |
b5a1a81e BF |
6047 | ret = nfsd4_create_callback_queue(); |
6048 | if (ret) | |
6049 | goto out_free_laundry; | |
09121281 | 6050 | |
c2f1a551 | 6051 | set_max_delegations(); |
d85ed443 | 6052 | |
b5a1a81e | 6053 | return 0; |
d85ed443 | 6054 | |
b5a1a81e BF |
6055 | out_free_laundry: |
6056 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6057 | out_recovery: |
b5a1a81e | 6058 | return ret; |
1da177e4 LT |
6059 | } |
6060 | ||
f252bc68 | 6061 | void |
4dce0ac9 | 6062 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6063 | { |
1da177e4 | 6064 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6065 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6066 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6067 | |
4dce0ac9 SK |
6068 | cancel_delayed_work_sync(&nn->laundromat_work); |
6069 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6070 | |
e50a26dc | 6071 | nfs4_lock_state(); |
1da177e4 | 6072 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6073 | spin_lock(&state_lock); |
e8c69d17 | 6074 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6075 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6076 | unhash_delegation_locked(dp); |
6077 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6078 | } |
cdc97505 | 6079 | spin_unlock(&state_lock); |
1da177e4 LT |
6080 | list_for_each_safe(pos, next, &reaplist) { |
6081 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6082 | list_del_init(&dp->dl_recall_lru); |
6011695d | 6083 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6084 | } |
6085 | ||
3320fef1 | 6086 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6087 | nfs4_state_destroy_net(net); |
e50a26dc | 6088 | nfs4_unlock_state(); |
1da177e4 LT |
6089 | } |
6090 | ||
6091 | void | |
6092 | nfs4_state_shutdown(void) | |
6093 | { | |
5e8d5c29 | 6094 | destroy_workqueue(laundry_wq); |
c3935e30 | 6095 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6096 | } |
8b70484c TM |
6097 | |
6098 | static void | |
6099 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6100 | { | |
37c593c5 TM |
6101 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6102 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6103 | } |
6104 | ||
6105 | static void | |
6106 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6107 | { | |
37c593c5 TM |
6108 | if (cstate->minorversion) { |
6109 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6110 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6111 | } | |
6112 | } | |
6113 | ||
6114 | void | |
6115 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6116 | { | |
6117 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6118 | } |
6119 | ||
62cd4a59 TM |
6120 | /* |
6121 | * functions to set current state id | |
6122 | */ | |
9428fe1a TM |
6123 | void |
6124 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6125 | { | |
6126 | put_stateid(cstate, &odp->od_stateid); | |
6127 | } | |
6128 | ||
8b70484c TM |
6129 | void |
6130 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6131 | { | |
6132 | put_stateid(cstate, &open->op_stateid); | |
6133 | } | |
6134 | ||
62cd4a59 TM |
6135 | void |
6136 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6137 | { | |
6138 | put_stateid(cstate, &close->cl_stateid); | |
6139 | } | |
6140 | ||
6141 | void | |
6142 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6143 | { | |
6144 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6145 | } | |
6146 | ||
6147 | /* | |
6148 | * functions to consume current state id | |
6149 | */ | |
1e97b519 | 6150 | |
9428fe1a TM |
6151 | void |
6152 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6153 | { | |
6154 | get_stateid(cstate, &odp->od_stateid); | |
6155 | } | |
6156 | ||
6157 | void | |
6158 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6159 | { | |
6160 | get_stateid(cstate, &drp->dr_stateid); | |
6161 | } | |
6162 | ||
1e97b519 TM |
6163 | void |
6164 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6165 | { | |
6166 | get_stateid(cstate, &fsp->fr_stateid); | |
6167 | } | |
6168 | ||
6169 | void | |
6170 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6171 | { | |
6172 | get_stateid(cstate, &setattr->sa_stateid); | |
6173 | } | |
6174 | ||
8b70484c TM |
6175 | void |
6176 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6177 | { | |
6178 | get_stateid(cstate, &close->cl_stateid); | |
6179 | } | |
6180 | ||
6181 | void | |
62cd4a59 | 6182 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6183 | { |
62cd4a59 | 6184 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6185 | } |
30813e27 TM |
6186 | |
6187 | void | |
6188 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6189 | { | |
6190 | get_stateid(cstate, &read->rd_stateid); | |
6191 | } | |
6192 | ||
6193 | void | |
6194 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6195 | { | |
6196 | get_stateid(cstate, &write->wr_stateid); | |
6197 | } |