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