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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 | |
abf1135b CH |
88 | static struct kmem_cache *openowner_slab; |
89 | static struct kmem_cache *lockowner_slab; | |
90 | static struct kmem_cache *file_slab; | |
91 | static struct kmem_cache *stateid_slab; | |
92 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 93 | |
1da177e4 LT |
94 | void |
95 | nfs4_lock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_lock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
66b2b9b2 | 100 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 101 | |
f0f51f5c | 102 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 103 | { |
f0f51f5c | 104 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
105 | } |
106 | ||
f0f51f5c | 107 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 108 | { |
f0f51f5c | 109 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
110 | return nfserr_jukebox; |
111 | ses->se_flags |= NFS4_SESSION_DEAD; | |
112 | return nfs_ok; | |
508dc6e1 BH |
113 | } |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
221a6876 BF |
121 | static bool is_client_expired(struct nfs4_client *clp) |
122 | { | |
123 | return clp->cl_time == 0; | |
124 | } | |
125 | ||
126 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
127 | { | |
128 | if (atomic_read(&clp->cl_refcount)) | |
129 | return nfserr_jukebox; | |
130 | clp->cl_time = 0; | |
131 | return nfs_ok; | |
132 | } | |
133 | ||
134 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
135 | { | |
136 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
137 | __be32 ret; | |
138 | ||
139 | spin_lock(&nn->client_lock); | |
140 | ret = mark_client_expired_locked(clp); | |
141 | spin_unlock(&nn->client_lock); | |
142 | return ret; | |
143 | } | |
144 | ||
145 | static __be32 get_client_locked(struct nfs4_client *clp) | |
146 | { | |
147 | if (is_client_expired(clp)) | |
148 | return nfserr_expired; | |
149 | atomic_inc(&clp->cl_refcount); | |
150 | return nfs_ok; | |
151 | } | |
152 | ||
153 | /* must be called under the client_lock */ | |
154 | static inline void | |
155 | renew_client_locked(struct nfs4_client *clp) | |
156 | { | |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
158 | ||
159 | if (is_client_expired(clp)) { | |
160 | WARN_ON(1); | |
161 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
162 | __func__, | |
163 | clp->cl_clientid.cl_boot, | |
164 | clp->cl_clientid.cl_id); | |
165 | return; | |
166 | } | |
167 | ||
168 | dprintk("renewing client (clientid %08x/%08x)\n", | |
169 | clp->cl_clientid.cl_boot, | |
170 | clp->cl_clientid.cl_id); | |
171 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
172 | clp->cl_time = get_seconds(); | |
173 | } | |
174 | ||
175 | static inline void | |
176 | renew_client(struct nfs4_client *clp) | |
177 | { | |
178 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
179 | ||
180 | spin_lock(&nn->client_lock); | |
181 | renew_client_locked(clp); | |
182 | spin_unlock(&nn->client_lock); | |
183 | } | |
184 | ||
ba138435 | 185 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
186 | { |
187 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
188 | return; | |
189 | if (!is_client_expired(clp)) | |
190 | renew_client_locked(clp); | |
191 | } | |
192 | ||
4b24ca7d JL |
193 | static void put_client_renew(struct nfs4_client *clp) |
194 | { | |
195 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
196 | ||
d6c249b4 JL |
197 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
198 | return; | |
199 | if (!is_client_expired(clp)) | |
200 | renew_client_locked(clp); | |
4b24ca7d JL |
201 | spin_unlock(&nn->client_lock); |
202 | } | |
203 | ||
d4e19e70 TM |
204 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
205 | { | |
206 | __be32 status; | |
207 | ||
208 | if (is_session_dead(ses)) | |
209 | return nfserr_badsession; | |
210 | status = get_client_locked(ses->se_client); | |
211 | if (status) | |
212 | return status; | |
213 | atomic_inc(&ses->se_ref); | |
214 | return nfs_ok; | |
215 | } | |
216 | ||
217 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
218 | { | |
219 | struct nfs4_client *clp = ses->se_client; | |
220 | ||
221 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
222 | free_session(ses); | |
223 | put_client_renew_locked(clp); | |
224 | } | |
225 | ||
226 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
227 | { | |
228 | struct nfs4_client *clp = ses->se_client; | |
229 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
230 | ||
231 | spin_lock(&nn->client_lock); | |
232 | nfsd4_put_session_locked(ses); | |
233 | spin_unlock(&nn->client_lock); | |
234 | } | |
235 | ||
236 | ||
1da177e4 LT |
237 | static inline u32 |
238 | opaque_hashval(const void *ptr, int nbytes) | |
239 | { | |
240 | unsigned char *cptr = (unsigned char *) ptr; | |
241 | ||
242 | u32 x = 0; | |
243 | while (nbytes--) { | |
244 | x *= 37; | |
245 | x += *cptr++; | |
246 | } | |
247 | return x; | |
248 | } | |
249 | ||
32513b40 BF |
250 | static void nfsd4_free_file(struct nfs4_file *f) |
251 | { | |
252 | kmem_cache_free(file_slab, f); | |
253 | } | |
254 | ||
13cd2184 N |
255 | static inline void |
256 | put_nfs4_file(struct nfs4_file *fi) | |
257 | { | |
02e1215f JL |
258 | might_lock(&state_lock); |
259 | ||
cdc97505 | 260 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 261 | hlist_del(&fi->fi_hash); |
cdc97505 | 262 | spin_unlock(&state_lock); |
32513b40 | 263 | nfsd4_free_file(fi); |
8b671b80 | 264 | } |
13cd2184 N |
265 | } |
266 | ||
267 | static inline void | |
268 | get_nfs4_file(struct nfs4_file *fi) | |
269 | { | |
8b671b80 | 270 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
271 | } |
272 | ||
de18643d TM |
273 | static struct file * |
274 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
275 | { | |
276 | if (f->fi_fds[oflag]) | |
277 | return get_file(f->fi_fds[oflag]); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | static struct file * | |
282 | find_writeable_file_locked(struct nfs4_file *f) | |
283 | { | |
284 | struct file *ret; | |
285 | ||
286 | lockdep_assert_held(&f->fi_lock); | |
287 | ||
288 | ret = __nfs4_get_fd(f, O_WRONLY); | |
289 | if (!ret) | |
290 | ret = __nfs4_get_fd(f, O_RDWR); | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static struct file * | |
295 | find_writeable_file(struct nfs4_file *f) | |
296 | { | |
297 | struct file *ret; | |
298 | ||
299 | spin_lock(&f->fi_lock); | |
300 | ret = find_writeable_file_locked(f); | |
301 | spin_unlock(&f->fi_lock); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
307 | { | |
308 | struct file *ret; | |
309 | ||
310 | lockdep_assert_held(&f->fi_lock); | |
311 | ||
312 | ret = __nfs4_get_fd(f, O_RDONLY); | |
313 | if (!ret) | |
314 | ret = __nfs4_get_fd(f, O_RDWR); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static struct file * | |
319 | find_readable_file(struct nfs4_file *f) | |
320 | { | |
321 | struct file *ret; | |
322 | ||
323 | spin_lock(&f->fi_lock); | |
324 | ret = find_readable_file_locked(f); | |
325 | spin_unlock(&f->fi_lock); | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static struct file * | |
331 | find_any_file(struct nfs4_file *f) | |
332 | { | |
333 | struct file *ret; | |
334 | ||
335 | spin_lock(&f->fi_lock); | |
336 | ret = __nfs4_get_fd(f, O_RDWR); | |
337 | if (!ret) { | |
338 | ret = __nfs4_get_fd(f, O_WRONLY); | |
339 | if (!ret) | |
340 | ret = __nfs4_get_fd(f, O_RDONLY); | |
341 | } | |
342 | spin_unlock(&f->fi_lock); | |
343 | return ret; | |
344 | } | |
345 | ||
02a3508d | 346 | static atomic_long_t num_delegations; |
697ce9be | 347 | unsigned long max_delegations; |
ef0f3390 N |
348 | |
349 | /* | |
350 | * Open owner state (share locks) | |
351 | */ | |
352 | ||
16bfdaaf BF |
353 | /* hash tables for lock and open owners */ |
354 | #define OWNER_HASH_BITS 8 | |
355 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
356 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 357 | |
16bfdaaf | 358 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
359 | { |
360 | unsigned int ret; | |
361 | ||
362 | ret = opaque_hashval(ownername->data, ownername->len); | |
363 | ret += clientid; | |
16bfdaaf | 364 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 365 | } |
ef0f3390 | 366 | |
ef0f3390 N |
367 | /* hash table for nfs4_file */ |
368 | #define FILE_HASH_BITS 8 | |
369 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 370 | |
ca943217 | 371 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 372 | { |
ca943217 TM |
373 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
374 | } | |
375 | ||
376 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
377 | { | |
378 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
379 | } | |
380 | ||
381 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
382 | { | |
383 | return fh1->fh_size == fh2->fh_size && | |
384 | !memcmp(fh1->fh_base.fh_pad, | |
385 | fh2->fh_base.fh_pad, | |
386 | fh1->fh_size); | |
ddc04c41 BF |
387 | } |
388 | ||
89876f8c | 389 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 390 | |
12659651 JL |
391 | static void |
392 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 393 | { |
7214e860 JL |
394 | lockdep_assert_held(&fp->fi_lock); |
395 | ||
12659651 JL |
396 | if (access & NFS4_SHARE_ACCESS_WRITE) |
397 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
398 | if (access & NFS4_SHARE_ACCESS_READ) | |
399 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
400 | } |
401 | ||
12659651 JL |
402 | static __be32 |
403 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 404 | { |
7214e860 JL |
405 | lockdep_assert_held(&fp->fi_lock); |
406 | ||
12659651 JL |
407 | /* Does this access mode make sense? */ |
408 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
409 | return nfserr_inval; | |
410 | ||
baeb4ff0 JL |
411 | /* Does it conflict with a deny mode already set? */ |
412 | if ((access & fp->fi_share_deny) != 0) | |
413 | return nfserr_share_denied; | |
414 | ||
12659651 JL |
415 | __nfs4_file_get_access(fp, access); |
416 | return nfs_ok; | |
998db52c BF |
417 | } |
418 | ||
baeb4ff0 JL |
419 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
420 | { | |
421 | /* Common case is that there is no deny mode. */ | |
422 | if (deny) { | |
423 | /* Does this deny mode make sense? */ | |
424 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
425 | return nfserr_inval; | |
426 | ||
427 | if ((deny & NFS4_SHARE_DENY_READ) && | |
428 | atomic_read(&fp->fi_access[O_RDONLY])) | |
429 | return nfserr_share_denied; | |
430 | ||
431 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
432 | atomic_read(&fp->fi_access[O_WRONLY])) | |
433 | return nfserr_share_denied; | |
434 | } | |
435 | return nfs_ok; | |
436 | } | |
437 | ||
998db52c | 438 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 439 | { |
de18643d TM |
440 | might_lock(&fp->fi_lock); |
441 | ||
442 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
443 | struct file *f1 = NULL; | |
444 | struct file *f2 = NULL; | |
445 | ||
6d338b51 | 446 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 447 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 448 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
449 | spin_unlock(&fp->fi_lock); |
450 | if (f1) | |
451 | fput(f1); | |
452 | if (f2) | |
453 | fput(f2); | |
f9d7562f BF |
454 | } |
455 | } | |
456 | ||
12659651 | 457 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 458 | { |
12659651 JL |
459 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
460 | ||
461 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 462 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
463 | if (access & NFS4_SHARE_ACCESS_READ) |
464 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
465 | } |
466 | ||
6011695d TM |
467 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
468 | struct kmem_cache *slab) | |
2a74aba7 | 469 | { |
3abdb607 | 470 | struct nfs4_stid *stid; |
6136d2b4 | 471 | int new_id; |
2a74aba7 | 472 | |
f8338834 | 473 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
474 | if (!stid) |
475 | return NULL; | |
476 | ||
4770d722 JL |
477 | idr_preload(GFP_KERNEL); |
478 | spin_lock(&cl->cl_lock); | |
479 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
480 | spin_unlock(&cl->cl_lock); | |
481 | idr_preload_end(); | |
ebd6c707 | 482 | if (new_id < 0) |
3abdb607 | 483 | goto out_free; |
2a74aba7 | 484 | stid->sc_client = cl; |
3abdb607 BF |
485 | stid->sc_stateid.si_opaque.so_id = new_id; |
486 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 487 | /* Will be incremented before return to client: */ |
72c0b0fb | 488 | atomic_set(&stid->sc_count, 1); |
996e0938 | 489 | |
996e0938 | 490 | /* |
3abdb607 BF |
491 | * It shouldn't be a problem to reuse an opaque stateid value. |
492 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
493 | * example, a stray write retransmission could be accepted by | |
494 | * the server when it should have been rejected. Therefore, | |
495 | * adopt a trick from the sctp code to attempt to maximize the | |
496 | * amount of time until an id is reused, by ensuring they always | |
497 | * "increase" (mod INT_MAX): | |
996e0938 | 498 | */ |
3abdb607 BF |
499 | return stid; |
500 | out_free: | |
2c44a234 | 501 | kmem_cache_free(slab, stid); |
3abdb607 | 502 | return NULL; |
2a74aba7 BF |
503 | } |
504 | ||
b49e084d | 505 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 506 | { |
6011695d TM |
507 | struct nfs4_stid *stid; |
508 | struct nfs4_ol_stateid *stp; | |
509 | ||
510 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
511 | if (!stid) | |
512 | return NULL; | |
513 | ||
514 | stp = openlockstateid(stid); | |
515 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
516 | return stp; | |
517 | } | |
518 | ||
519 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
520 | { | |
6011695d TM |
521 | kmem_cache_free(deleg_slab, stid); |
522 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
523 | } |
524 | ||
6282cd56 N |
525 | /* |
526 | * When we recall a delegation, we should be careful not to hand it | |
527 | * out again straight away. | |
528 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
529 | * in which the filehandles of recalled delegations are "stored". | |
530 | * If a filehandle appear in either filter, a delegation is blocked. | |
531 | * When a delegation is recalled, the filehandle is stored in the "new" | |
532 | * filter. | |
533 | * Every 30 seconds we swap the filters and clear the "new" one, | |
534 | * unless both are empty of course. | |
535 | * | |
536 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
537 | * low 3 bytes as hash-table indices. | |
538 | * | |
f54fe962 | 539 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
540 | * is used to manage concurrent access. Testing does not need the lock |
541 | * except when swapping the two filters. | |
542 | */ | |
f54fe962 | 543 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
544 | static struct bloom_pair { |
545 | int entries, old_entries; | |
546 | time_t swap_time; | |
547 | int new; /* index into 'set' */ | |
548 | DECLARE_BITMAP(set[2], 256); | |
549 | } blocked_delegations; | |
550 | ||
551 | static int delegation_blocked(struct knfsd_fh *fh) | |
552 | { | |
553 | u32 hash; | |
554 | struct bloom_pair *bd = &blocked_delegations; | |
555 | ||
556 | if (bd->entries == 0) | |
557 | return 0; | |
558 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 559 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
560 | if (seconds_since_boot() - bd->swap_time > 30) { |
561 | bd->entries -= bd->old_entries; | |
562 | bd->old_entries = bd->entries; | |
563 | memset(bd->set[bd->new], 0, | |
564 | sizeof(bd->set[0])); | |
565 | bd->new = 1-bd->new; | |
566 | bd->swap_time = seconds_since_boot(); | |
567 | } | |
f54fe962 | 568 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
569 | } |
570 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
571 | if (test_bit(hash&255, bd->set[0]) && | |
572 | test_bit((hash>>8)&255, bd->set[0]) && | |
573 | test_bit((hash>>16)&255, bd->set[0])) | |
574 | return 1; | |
575 | ||
576 | if (test_bit(hash&255, bd->set[1]) && | |
577 | test_bit((hash>>8)&255, bd->set[1]) && | |
578 | test_bit((hash>>16)&255, bd->set[1])) | |
579 | return 1; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | static void block_delegations(struct knfsd_fh *fh) | |
585 | { | |
586 | u32 hash; | |
587 | struct bloom_pair *bd = &blocked_delegations; | |
588 | ||
589 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
590 | ||
f54fe962 | 591 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
592 | __set_bit(hash&255, bd->set[bd->new]); |
593 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
594 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
595 | if (bd->entries == 0) | |
596 | bd->swap_time = seconds_since_boot(); | |
597 | bd->entries += 1; | |
f54fe962 | 598 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
599 | } |
600 | ||
1da177e4 | 601 | static struct nfs4_delegation * |
f9416e28 | 602 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
603 | { |
604 | struct nfs4_delegation *dp; | |
02a3508d | 605 | long n; |
1da177e4 LT |
606 | |
607 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
608 | n = atomic_long_inc_return(&num_delegations); |
609 | if (n < 0 || n > max_delegations) | |
610 | goto out_dec; | |
6282cd56 | 611 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 612 | goto out_dec; |
996e0938 | 613 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 614 | if (dp == NULL) |
02a3508d | 615 | goto out_dec; |
6011695d TM |
616 | |
617 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
618 | /* |
619 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
620 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
621 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
622 | */ |
623 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
624 | INIT_LIST_HEAD(&dp->dl_perfile); |
625 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 626 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 627 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 628 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 629 | return dp; |
02a3508d TM |
630 | out_dec: |
631 | atomic_long_dec(&num_delegations); | |
632 | return NULL; | |
1da177e4 LT |
633 | } |
634 | ||
635 | void | |
6011695d | 636 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 637 | { |
11b9164a | 638 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
639 | struct nfs4_client *clp = s->sc_client; |
640 | ||
4770d722 JL |
641 | might_lock(&clp->cl_lock); |
642 | ||
643 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) | |
6011695d TM |
644 | return; |
645 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
4770d722 | 646 | spin_unlock(&clp->cl_lock); |
6011695d | 647 | s->sc_free(s); |
11b9164a TM |
648 | if (fp) |
649 | put_nfs4_file(fp); | |
1da177e4 LT |
650 | } |
651 | ||
acfdf5c3 | 652 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 653 | { |
417c6629 JL |
654 | lockdep_assert_held(&state_lock); |
655 | ||
cbf7a75b BF |
656 | if (!fp->fi_lease) |
657 | return; | |
acfdf5c3 BF |
658 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
659 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
660 | fp->fi_lease = NULL; | |
4ee63624 | 661 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
662 | fp->fi_deleg_file = NULL; |
663 | } | |
1da177e4 LT |
664 | } |
665 | ||
6136d2b4 BF |
666 | static void unhash_stid(struct nfs4_stid *s) |
667 | { | |
3abdb607 | 668 | s->sc_type = 0; |
6136d2b4 BF |
669 | } |
670 | ||
931ee56c BH |
671 | static void |
672 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
673 | { | |
cdc97505 | 674 | lockdep_assert_held(&state_lock); |
417c6629 | 675 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 676 | |
3fb87d13 | 677 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
678 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
679 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
680 | } | |
681 | ||
1da177e4 | 682 | static void |
42690676 | 683 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 684 | { |
11b9164a | 685 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 686 | |
42690676 JL |
687 | lockdep_assert_held(&state_lock); |
688 | ||
b0fc29d6 | 689 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
690 | /* Ensure that deleg break won't try to requeue it */ |
691 | ++dp->dl_time; | |
417c6629 | 692 | spin_lock(&fp->fi_lock); |
931ee56c | 693 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 694 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
695 | list_del_init(&dp->dl_perfile); |
696 | spin_unlock(&fp->fi_lock); | |
f8338834 | 697 | if (fp) |
02e1215f | 698 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
699 | } |
700 | ||
3bd64a5b BF |
701 | static void destroy_delegation(struct nfs4_delegation *dp) |
702 | { | |
42690676 JL |
703 | spin_lock(&state_lock); |
704 | unhash_delegation_locked(dp); | |
705 | spin_unlock(&state_lock); | |
6011695d | 706 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
707 | } |
708 | ||
709 | static void revoke_delegation(struct nfs4_delegation *dp) | |
710 | { | |
711 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
712 | ||
2d4a532d JL |
713 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
714 | ||
3bd64a5b | 715 | if (clp->cl_minorversion == 0) |
6011695d | 716 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 717 | else { |
3bd64a5b | 718 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
719 | spin_lock(&clp->cl_lock); |
720 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
721 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
722 | } |
723 | } | |
724 | ||
1da177e4 LT |
725 | /* |
726 | * SETCLIENTID state | |
727 | */ | |
728 | ||
ddc04c41 BF |
729 | static unsigned int clientid_hashval(u32 id) |
730 | { | |
731 | return id & CLIENT_HASH_MASK; | |
732 | } | |
733 | ||
734 | static unsigned int clientstr_hashval(const char *name) | |
735 | { | |
736 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
737 | } | |
738 | ||
f9d7562f BF |
739 | /* |
740 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
741 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
742 | * only what share bits are currently in force, but also what | |
743 | * combinations of share bits previous opens have used. This allows us | |
744 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
745 | * return an error if the client attempt to downgrade to a combination | |
746 | * of share bits not explicable by closing some of its previous opens. | |
747 | * | |
748 | * XXX: This enforcement is actually incomplete, since we don't keep | |
749 | * track of access/deny bit combinations; so, e.g., we allow: | |
750 | * | |
751 | * OPEN allow read, deny write | |
752 | * OPEN allow both, deny none | |
753 | * DOWNGRADE allow read, deny none | |
754 | * | |
755 | * which we should reject. | |
756 | */ | |
5ae037e5 JL |
757 | static unsigned int |
758 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 759 | int i; |
5ae037e5 | 760 | unsigned int access = 0; |
f9d7562f | 761 | |
f9d7562f BF |
762 | for (i = 1; i < 4; i++) { |
763 | if (test_bit(i, &bmap)) | |
5ae037e5 | 764 | access |= i; |
f9d7562f | 765 | } |
5ae037e5 | 766 | return access; |
f9d7562f BF |
767 | } |
768 | ||
82c5ff1b JL |
769 | /* set share access for a given stateid */ |
770 | static inline void | |
771 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
772 | { | |
c11c591f JL |
773 | unsigned char mask = 1 << access; |
774 | ||
775 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
776 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
777 | } |
778 | ||
779 | /* clear share access for a given stateid */ | |
780 | static inline void | |
781 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
782 | { | |
c11c591f JL |
783 | unsigned char mask = 1 << access; |
784 | ||
785 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
786 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
787 | } |
788 | ||
789 | /* test whether a given stateid has access */ | |
790 | static inline bool | |
791 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
792 | { | |
c11c591f JL |
793 | unsigned char mask = 1 << access; |
794 | ||
795 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
796 | } |
797 | ||
ce0fc43c JL |
798 | /* set share deny for a given stateid */ |
799 | static inline void | |
c11c591f | 800 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 801 | { |
c11c591f JL |
802 | unsigned char mask = 1 << deny; |
803 | ||
804 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
805 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
806 | } |
807 | ||
808 | /* clear share deny for a given stateid */ | |
809 | static inline void | |
c11c591f | 810 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 811 | { |
c11c591f JL |
812 | unsigned char mask = 1 << deny; |
813 | ||
814 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
815 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
816 | } |
817 | ||
818 | /* test whether a given stateid is denying specific access */ | |
819 | static inline bool | |
c11c591f | 820 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 821 | { |
c11c591f JL |
822 | unsigned char mask = 1 << deny; |
823 | ||
824 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
825 | } |
826 | ||
827 | static int nfs4_access_to_omode(u32 access) | |
828 | { | |
8f34a430 | 829 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
830 | case NFS4_SHARE_ACCESS_READ: |
831 | return O_RDONLY; | |
832 | case NFS4_SHARE_ACCESS_WRITE: | |
833 | return O_WRONLY; | |
834 | case NFS4_SHARE_ACCESS_BOTH: | |
835 | return O_RDWR; | |
836 | } | |
063b0fb9 BF |
837 | WARN_ON_ONCE(1); |
838 | return O_RDONLY; | |
f9d7562f BF |
839 | } |
840 | ||
baeb4ff0 JL |
841 | /* |
842 | * A stateid that had a deny mode associated with it is being released | |
843 | * or downgraded. Recalculate the deny mode on the file. | |
844 | */ | |
845 | static void | |
846 | recalculate_deny_mode(struct nfs4_file *fp) | |
847 | { | |
848 | struct nfs4_ol_stateid *stp; | |
849 | ||
850 | spin_lock(&fp->fi_lock); | |
851 | fp->fi_share_deny = 0; | |
852 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
853 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
854 | spin_unlock(&fp->fi_lock); | |
855 | } | |
856 | ||
857 | static void | |
858 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
859 | { | |
860 | int i; | |
861 | bool change = false; | |
862 | ||
863 | for (i = 1; i < 4; i++) { | |
864 | if ((i & deny) != i) { | |
865 | change = true; | |
866 | clear_deny(i, stp); | |
867 | } | |
868 | } | |
869 | ||
870 | /* Recalculate per-file deny mode if there was a change */ | |
871 | if (change) | |
11b9164a | 872 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
873 | } |
874 | ||
82c5ff1b JL |
875 | /* release all access and file references for a given stateid */ |
876 | static void | |
877 | release_all_access(struct nfs4_ol_stateid *stp) | |
878 | { | |
879 | int i; | |
11b9164a | 880 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
881 | |
882 | if (fp && stp->st_deny_bmap != 0) | |
883 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
884 | |
885 | for (i = 1; i < 4; i++) { | |
886 | if (test_access(i, stp)) | |
11b9164a | 887 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
888 | clear_access(i, stp); |
889 | } | |
890 | } | |
891 | ||
dcef0413 | 892 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 893 | { |
11b9164a | 894 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 TM |
895 | |
896 | spin_lock(&fp->fi_lock); | |
529d7b2a | 897 | list_del(&stp->st_perfile); |
1d31a253 | 898 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
899 | list_del(&stp->st_perstateowner); |
900 | } | |
901 | ||
6011695d | 902 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 903 | { |
6011695d | 904 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 905 | |
6011695d | 906 | release_all_access(stp); |
6011695d | 907 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
908 | } |
909 | ||
b49e084d | 910 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 911 | { |
b49e084d JL |
912 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
913 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
914 | struct file *file; |
915 | ||
b49e084d JL |
916 | file = find_any_file(stp->st_stid.sc_file); |
917 | if (file) | |
918 | filp_close(file, (fl_owner_t)lo); | |
919 | nfs4_free_ol_stateid(stid); | |
920 | } | |
921 | ||
922 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) | |
923 | { | |
3c87b9b7 | 924 | list_del(&stp->st_locks); |
529d7b2a | 925 | unhash_generic_stateid(stp); |
6136d2b4 | 926 | unhash_stid(&stp->st_stid); |
6011695d | 927 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
928 | } |
929 | ||
fe0750e5 | 930 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 931 | { |
dcef0413 | 932 | struct nfs4_ol_stateid *stp; |
529d7b2a | 933 | |
fe0750e5 | 934 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
935 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
936 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 937 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 938 | __release_lock_stateid(stp); |
529d7b2a BF |
939 | } |
940 | } | |
941 | ||
50cc6231 TM |
942 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
943 | { | |
944 | kfree(lo->lo_owner.so_owner.data); | |
945 | kmem_cache_free(lockowner_slab, lo); | |
946 | } | |
947 | ||
fe0750e5 | 948 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 949 | { |
fe0750e5 BF |
950 | unhash_lockowner(lo); |
951 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
952 | } |
953 | ||
3c87b9b7 TM |
954 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
955 | { | |
956 | if (list_empty(&lo->lo_owner.so_stateids)) | |
957 | release_lockowner(lo); | |
958 | } | |
959 | ||
960 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 961 | { |
fe0750e5 | 962 | struct nfs4_lockowner *lo; |
529d7b2a | 963 | |
3c87b9b7 TM |
964 | lo = lockowner(stp->st_stateowner); |
965 | __release_lock_stateid(stp); | |
966 | release_lockowner_if_empty(lo); | |
967 | } | |
968 | ||
969 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
970 | { | |
971 | struct nfs4_ol_stateid *stp; | |
972 | ||
973 | while (!list_empty(&open_stp->st_locks)) { | |
974 | stp = list_entry(open_stp->st_locks.next, | |
975 | struct nfs4_ol_stateid, st_locks); | |
976 | release_lock_stateid(stp); | |
529d7b2a BF |
977 | } |
978 | } | |
979 | ||
38c387b5 | 980 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
981 | { |
982 | unhash_generic_stateid(stp); | |
3c87b9b7 | 983 | release_open_stateid_locks(stp); |
38c387b5 BF |
984 | } |
985 | ||
986 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
987 | { | |
988 | unhash_open_stateid(stp); | |
6011695d | 989 | nfs4_put_stid(&stp->st_stid); |
2283963f BF |
990 | } |
991 | ||
fe0750e5 | 992 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 993 | { |
dcef0413 | 994 | struct nfs4_ol_stateid *stp; |
f1d110ca | 995 | |
fe0750e5 BF |
996 | list_del(&oo->oo_owner.so_strhash); |
997 | list_del(&oo->oo_perclient); | |
998 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
999 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 1000 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 1001 | release_open_stateid(stp); |
f1d110ca BF |
1002 | } |
1003 | } | |
1004 | ||
f7a4d872 BF |
1005 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1006 | { | |
1007 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1008 | ||
1009 | if (s) { | |
6011695d | 1010 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1011 | oo->oo_last_closed_stid = NULL; |
1012 | } | |
1013 | } | |
1014 | ||
50cc6231 TM |
1015 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
1016 | { | |
1017 | kfree(oo->oo_owner.so_owner.data); | |
1018 | kmem_cache_free(openowner_slab, oo); | |
1019 | } | |
1020 | ||
fe0750e5 | 1021 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1022 | { |
fe0750e5 BF |
1023 | unhash_openowner(oo); |
1024 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 1025 | release_last_closed_stateid(oo); |
fe0750e5 | 1026 | nfs4_free_openowner(oo); |
f1d110ca BF |
1027 | } |
1028 | ||
5282fd72 ME |
1029 | static inline int |
1030 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1031 | { | |
1032 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1033 | ||
1034 | return sid->sequence % SESSION_HASH_SIZE; | |
1035 | } | |
1036 | ||
8f199b82 | 1037 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1038 | static inline void |
1039 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1040 | { | |
1041 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1042 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1043 | } | |
8f199b82 TM |
1044 | #else |
1045 | static inline void | |
1046 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1047 | { | |
1048 | } | |
1049 | #endif | |
1050 | ||
9411b1d4 BF |
1051 | /* |
1052 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1053 | * won't be used for replay. | |
1054 | */ | |
1055 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1056 | { | |
1057 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1058 | ||
1059 | if (nfserr == nfserr_replay_me) | |
1060 | return; | |
1061 | ||
1062 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
1063 | cstate->replay_owner = NULL; | |
1064 | return; | |
1065 | } | |
1066 | if (!so) | |
1067 | return; | |
1068 | if (so->so_is_open_owner) | |
1069 | release_last_closed_stateid(openowner(so)); | |
1070 | so->so_seqid++; | |
1071 | return; | |
1072 | } | |
5282fd72 | 1073 | |
ec6b5d7b AA |
1074 | static void |
1075 | gen_sessionid(struct nfsd4_session *ses) | |
1076 | { | |
1077 | struct nfs4_client *clp = ses->se_client; | |
1078 | struct nfsd4_sessionid *sid; | |
1079 | ||
1080 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1081 | sid->clientid = clp->cl_clientid; | |
1082 | sid->sequence = current_sessionid++; | |
1083 | sid->reserved = 0; | |
1084 | } | |
1085 | ||
1086 | /* | |
a649637c AA |
1087 | * The protocol defines ca_maxresponssize_cached to include the size of |
1088 | * the rpc header, but all we need to cache is the data starting after | |
1089 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1090 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1091 | * value that is the number of bytes in our cache plus a few additional | |
1092 | * bytes. In order to stay on the safe side, and not promise more than | |
1093 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1094 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1095 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1096 | * for the SEQUENCE op response: | |
1097 | */ | |
1098 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1099 | ||
557ce264 AA |
1100 | static void |
1101 | free_session_slots(struct nfsd4_session *ses) | |
1102 | { | |
1103 | int i; | |
1104 | ||
1105 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1106 | kfree(ses->se_slots[i]); | |
1107 | } | |
1108 | ||
a649637c | 1109 | /* |
efe0cb6d BF |
1110 | * We don't actually need to cache the rpc and session headers, so we |
1111 | * can allocate a little less for each slot: | |
1112 | */ | |
55c760cf | 1113 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1114 | { |
55c760cf | 1115 | u32 size; |
efe0cb6d | 1116 | |
55c760cf BF |
1117 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1118 | size = 0; | |
1119 | else | |
1120 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1121 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1122 | } |
ec6b5d7b | 1123 | |
5b6feee9 BF |
1124 | /* |
1125 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1126 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1127 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1128 | */ |
55c760cf | 1129 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1130 | { |
55c760cf BF |
1131 | u32 slotsize = slot_bytes(ca); |
1132 | u32 num = ca->maxreqs; | |
5b6feee9 | 1133 | int avail; |
ec6b5d7b | 1134 | |
5b6feee9 | 1135 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1136 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1137 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1138 | num = min_t(int, num, avail / slotsize); |
1139 | nfsd_drc_mem_used += num * slotsize; | |
1140 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1141 | |
5b6feee9 BF |
1142 | return num; |
1143 | } | |
ec6b5d7b | 1144 | |
55c760cf | 1145 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1146 | { |
55c760cf BF |
1147 | int slotsize = slot_bytes(ca); |
1148 | ||
4bd9b0f4 | 1149 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1150 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1151 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1152 | } |
ec6b5d7b | 1153 | |
60810e54 KM |
1154 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1155 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1156 | { |
60810e54 KM |
1157 | int numslots = fattrs->maxreqs; |
1158 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1159 | struct nfsd4_session *new; |
1160 | int mem, i; | |
a649637c | 1161 | |
5b6feee9 BF |
1162 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1163 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1164 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1165 | |
5b6feee9 BF |
1166 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1167 | if (!new) | |
1168 | return NULL; | |
557ce264 | 1169 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1170 | for (i = 0; i < numslots; i++) { |
55c760cf | 1171 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1172 | if (!new->se_slots[i]) |
557ce264 | 1173 | goto out_free; |
557ce264 | 1174 | } |
60810e54 KM |
1175 | |
1176 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1177 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1178 | ||
5b6feee9 BF |
1179 | return new; |
1180 | out_free: | |
1181 | while (i--) | |
1182 | kfree(new->se_slots[i]); | |
1183 | kfree(new); | |
1184 | return NULL; | |
ec6b5d7b AA |
1185 | } |
1186 | ||
19cf5c02 BF |
1187 | static void free_conn(struct nfsd4_conn *c) |
1188 | { | |
1189 | svc_xprt_put(c->cn_xprt); | |
1190 | kfree(c); | |
1191 | } | |
ec6b5d7b | 1192 | |
19cf5c02 BF |
1193 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1194 | { | |
1195 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1196 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1197 | |
19cf5c02 BF |
1198 | spin_lock(&clp->cl_lock); |
1199 | if (!list_empty(&c->cn_persession)) { | |
1200 | list_del(&c->cn_persession); | |
1201 | free_conn(c); | |
1202 | } | |
eea49806 | 1203 | nfsd4_probe_callback(clp); |
2e4b7239 | 1204 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1205 | } |
ec6b5d7b | 1206 | |
d29c374c | 1207 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1208 | { |
c7662518 | 1209 | struct nfsd4_conn *conn; |
ec6b5d7b | 1210 | |
c7662518 BF |
1211 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1212 | if (!conn) | |
db90681d | 1213 | return NULL; |
c7662518 BF |
1214 | svc_xprt_get(rqstp->rq_xprt); |
1215 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1216 | conn->cn_flags = flags; |
db90681d BF |
1217 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1218 | return conn; | |
1219 | } | |
a649637c | 1220 | |
328ead28 BF |
1221 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1222 | { | |
1223 | conn->cn_session = ses; | |
1224 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1225 | } |
1226 | ||
db90681d | 1227 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1228 | { |
db90681d | 1229 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1230 | |
c7662518 | 1231 | spin_lock(&clp->cl_lock); |
328ead28 | 1232 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1233 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1234 | } |
1235 | ||
21b75b01 | 1236 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1237 | { |
19cf5c02 | 1238 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1239 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1240 | } |
1241 | ||
e1ff371f | 1242 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1243 | { |
21b75b01 | 1244 | int ret; |
ec6b5d7b | 1245 | |
db90681d | 1246 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1247 | ret = nfsd4_register_conn(conn); |
1248 | if (ret) | |
1249 | /* oops; xprt is already down: */ | |
1250 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1251 | /* We may have gained or lost a callback channel: */ |
1252 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1253 | } |
ec6b5d7b | 1254 | |
e1ff371f | 1255 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1256 | { |
1257 | u32 dir = NFS4_CDFC4_FORE; | |
1258 | ||
e1ff371f | 1259 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1260 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1261 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1262 | } |
1263 | ||
1264 | /* must be called under client_lock */ | |
19cf5c02 | 1265 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1266 | { |
19cf5c02 BF |
1267 | struct nfs4_client *clp = s->se_client; |
1268 | struct nfsd4_conn *c; | |
ec6b5d7b | 1269 | |
19cf5c02 BF |
1270 | spin_lock(&clp->cl_lock); |
1271 | while (!list_empty(&s->se_conns)) { | |
1272 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1273 | list_del_init(&c->cn_persession); | |
1274 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1275 | |
19cf5c02 BF |
1276 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1277 | free_conn(c); | |
ec6b5d7b | 1278 | |
19cf5c02 BF |
1279 | spin_lock(&clp->cl_lock); |
1280 | } | |
1281 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1282 | } |
ec6b5d7b | 1283 | |
1377b69e BF |
1284 | static void __free_session(struct nfsd4_session *ses) |
1285 | { | |
1377b69e BF |
1286 | free_session_slots(ses); |
1287 | kfree(ses); | |
1288 | } | |
1289 | ||
66b2b9b2 | 1290 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1291 | { |
66b2b9b2 | 1292 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1293 | |
1294 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1295 | nfsd4_del_conns(ses); |
55c760cf | 1296 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1297 | __free_session(ses); |
c7662518 BF |
1298 | } |
1299 | ||
135ae827 | 1300 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1301 | { |
a827bcb2 | 1302 | int idx; |
1872de0e | 1303 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1304 | |
ec6b5d7b AA |
1305 | new->se_client = clp; |
1306 | gen_sessionid(new); | |
ec6b5d7b | 1307 | |
c7662518 BF |
1308 | INIT_LIST_HEAD(&new->se_conns); |
1309 | ||
ac7c46f2 | 1310 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1311 | new->se_flags = cses->flags; |
8b5ce5cd | 1312 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1313 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1314 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1315 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1316 | spin_lock(&nn->client_lock); |
1872de0e | 1317 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1318 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1319 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1320 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1321 | spin_unlock(&nn->client_lock); |
60810e54 | 1322 | |
dcbeaa68 | 1323 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1324 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1325 | /* |
1326 | * This is a little silly; with sessions there's no real | |
1327 | * use for the callback address. Use the peer address | |
1328 | * as a reasonable default for now, but consider fixing | |
1329 | * the rpc client not to require an address in the | |
1330 | * future: | |
1331 | */ | |
edd76786 BF |
1332 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1333 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1334 | } |
ec6b5d7b AA |
1335 | } |
1336 | ||
9089f1b4 | 1337 | /* caller must hold client_lock */ |
5282fd72 | 1338 | static struct nfsd4_session * |
d4e19e70 | 1339 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1340 | { |
1341 | struct nfsd4_session *elem; | |
1342 | int idx; | |
1872de0e | 1343 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1344 | |
1345 | dump_sessionid(__func__, sessionid); | |
1346 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1347 | /* Search in the appropriate list */ |
1872de0e | 1348 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1349 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1350 | NFS4_MAX_SESSIONID_LEN)) { | |
1351 | return elem; | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | dprintk("%s: session not found\n", __func__); | |
1356 | return NULL; | |
1357 | } | |
1358 | ||
d4e19e70 TM |
1359 | static struct nfsd4_session * |
1360 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1361 | __be32 *ret) | |
1362 | { | |
1363 | struct nfsd4_session *session; | |
1364 | __be32 status = nfserr_badsession; | |
1365 | ||
1366 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1367 | if (!session) | |
1368 | goto out; | |
1369 | status = nfsd4_get_session_locked(session); | |
1370 | if (status) | |
1371 | session = NULL; | |
1372 | out: | |
1373 | *ret = status; | |
1374 | return session; | |
1375 | } | |
1376 | ||
9089f1b4 | 1377 | /* caller must hold client_lock */ |
7116ed6b | 1378 | static void |
5282fd72 | 1379 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1380 | { |
1381 | list_del(&ses->se_hash); | |
4c649378 | 1382 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1383 | list_del(&ses->se_perclnt); |
4c649378 | 1384 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1385 | } |
1386 | ||
1da177e4 LT |
1387 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1388 | static int | |
2c142baa | 1389 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1390 | { |
2c142baa | 1391 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1392 | return 0; |
60adfc50 | 1393 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1394 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1395 | return 1; |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * XXX Should we use a slab cache ? | |
1400 | * This type of memory management is somewhat inefficient, but we use it | |
1401 | * anyway since SETCLIENTID is not a common operation. | |
1402 | */ | |
35bba9a3 | 1403 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1404 | { |
1405 | struct nfs4_client *clp; | |
1406 | ||
35bba9a3 BF |
1407 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1408 | if (clp == NULL) | |
1409 | return NULL; | |
67114fe6 | 1410 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1411 | if (clp->cl_name.data == NULL) { |
1412 | kfree(clp); | |
1413 | return NULL; | |
1da177e4 | 1414 | } |
35bba9a3 | 1415 | clp->cl_name.len = name.len; |
5694c93e TM |
1416 | INIT_LIST_HEAD(&clp->cl_sessions); |
1417 | idr_init(&clp->cl_stateids); | |
1418 | atomic_set(&clp->cl_refcount, 0); | |
1419 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1420 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1421 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1422 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1423 | INIT_LIST_HEAD(&clp->cl_lru); | |
1424 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1425 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1426 | spin_lock_init(&clp->cl_lock); | |
1427 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1428 | return clp; |
1429 | } | |
1430 | ||
4dd86e15 | 1431 | static void |
1da177e4 LT |
1432 | free_client(struct nfs4_client *clp) |
1433 | { | |
bca0ec65 | 1434 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1435 | |
1436 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1437 | while (!list_empty(&clp->cl_sessions)) { |
1438 | struct nfsd4_session *ses; | |
1439 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1440 | se_perclnt); | |
1441 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1442 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1443 | free_session(ses); | |
792c95dd | 1444 | } |
4cb57e30 | 1445 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1446 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1447 | kfree(clp->cl_name.data); |
2d32b29a | 1448 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1449 | kfree(clp); |
1450 | } | |
1451 | ||
84d38ac9 BH |
1452 | /* must be called under the client_lock */ |
1453 | static inline void | |
1454 | unhash_client_locked(struct nfs4_client *clp) | |
1455 | { | |
792c95dd BF |
1456 | struct nfsd4_session *ses; |
1457 | ||
84d38ac9 | 1458 | list_del(&clp->cl_lru); |
4c649378 | 1459 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1460 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1461 | list_del_init(&ses->se_hash); | |
4c649378 | 1462 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1463 | } |
1464 | ||
1da177e4 | 1465 | static void |
0d22f68f | 1466 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1467 | { |
fe0750e5 | 1468 | struct nfs4_openowner *oo; |
1da177e4 | 1469 | struct nfs4_delegation *dp; |
1da177e4 | 1470 | struct list_head reaplist; |
382a62e7 | 1471 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1472 | |
1da177e4 | 1473 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1474 | spin_lock(&state_lock); |
ea1da636 N |
1475 | while (!list_empty(&clp->cl_delegations)) { |
1476 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1477 | unhash_delegation_locked(dp); |
1478 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1479 | } |
cdc97505 | 1480 | spin_unlock(&state_lock); |
1da177e4 LT |
1481 | while (!list_empty(&reaplist)) { |
1482 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1483 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1484 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1485 | } |
2d4a532d | 1486 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1487 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1488 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1489 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1490 | } |
ea1da636 | 1491 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1492 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1493 | release_openowner(oo); | |
1da177e4 | 1494 | } |
6ff8da08 | 1495 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1496 | if (clp->cl_cb_conn.cb_xprt) |
1497 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1498 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1499 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1500 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1501 | else |
a99454aa | 1502 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1503 | spin_lock(&nn->client_lock); |
84d38ac9 | 1504 | unhash_client_locked(clp); |
221a6876 BF |
1505 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1506 | free_client(clp); | |
c9a49628 | 1507 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1508 | } |
1509 | ||
0d22f68f BF |
1510 | static void expire_client(struct nfs4_client *clp) |
1511 | { | |
1512 | nfsd4_client_record_remove(clp); | |
1513 | destroy_client(clp); | |
1514 | } | |
1515 | ||
35bba9a3 BF |
1516 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1517 | { | |
1518 | memcpy(target->cl_verifier.data, source->data, | |
1519 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1520 | } |
1521 | ||
35bba9a3 BF |
1522 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1523 | { | |
1da177e4 LT |
1524 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1525 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1526 | } | |
1527 | ||
03a4e1f6 | 1528 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1529 | { |
03a4e1f6 BF |
1530 | if (source->cr_principal) { |
1531 | target->cr_principal = | |
1532 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1533 | if (target->cr_principal == NULL) | |
1534 | return -ENOMEM; | |
1535 | } else | |
1536 | target->cr_principal = NULL; | |
d5497fc6 | 1537 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1538 | target->cr_uid = source->cr_uid; |
1539 | target->cr_gid = source->cr_gid; | |
1540 | target->cr_group_info = source->cr_group_info; | |
1541 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1542 | target->cr_gss_mech = source->cr_gss_mech; |
1543 | if (source->cr_gss_mech) | |
1544 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1545 | return 0; |
1da177e4 LT |
1546 | } |
1547 | ||
ac55fdc4 JL |
1548 | static long long |
1549 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1550 | { | |
1551 | long long res; | |
1552 | ||
1553 | res = o1->len - o2->len; | |
1554 | if (res) | |
1555 | return res; | |
1556 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1557 | } | |
1558 | ||
35bba9a3 | 1559 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1560 | { |
a55370a3 | 1561 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1562 | } |
1563 | ||
1564 | static int | |
599e0a22 BF |
1565 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1566 | { | |
1567 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | static int | |
599e0a22 BF |
1571 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1572 | { | |
1573 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1574 | } |
1575 | ||
8fbba96e BF |
1576 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1577 | { | |
1578 | int i; | |
1579 | ||
1580 | if (g1->ngroups != g2->ngroups) | |
1581 | return false; | |
1582 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1583 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1584 | return false; |
1585 | return true; | |
1586 | } | |
1587 | ||
68eb3508 BF |
1588 | /* |
1589 | * RFC 3530 language requires clid_inuse be returned when the | |
1590 | * "principal" associated with a requests differs from that previously | |
1591 | * used. We use uid, gid's, and gss principal string as our best | |
1592 | * approximation. We also don't want to allow non-gss use of a client | |
1593 | * established using gss: in theory cr_principal should catch that | |
1594 | * change, but in practice cr_principal can be null even in the gss case | |
1595 | * since gssd doesn't always pass down a principal string. | |
1596 | */ | |
1597 | static bool is_gss_cred(struct svc_cred *cr) | |
1598 | { | |
1599 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1600 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1601 | } | |
1602 | ||
1603 | ||
5559b50a | 1604 | static bool |
599e0a22 BF |
1605 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1606 | { | |
68eb3508 | 1607 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1608 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1609 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1610 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1611 | return false; | |
1612 | if (cr1->cr_principal == cr2->cr_principal) | |
1613 | return true; | |
1614 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1615 | return false; | |
5559b50a | 1616 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1617 | } |
1618 | ||
57266a6e BF |
1619 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1620 | { | |
1621 | struct svc_cred *cr = &rqstp->rq_cred; | |
1622 | u32 service; | |
1623 | ||
c4720591 BF |
1624 | if (!cr->cr_gss_mech) |
1625 | return false; | |
57266a6e BF |
1626 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1627 | return service == RPC_GSS_SVC_INTEGRITY || | |
1628 | service == RPC_GSS_SVC_PRIVACY; | |
1629 | } | |
1630 | ||
1631 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1632 | { | |
1633 | struct svc_cred *cr = &rqstp->rq_cred; | |
1634 | ||
1635 | if (!cl->cl_mach_cred) | |
1636 | return true; | |
1637 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1638 | return false; | |
1639 | if (!svc_rqst_integrity_protected(rqstp)) | |
1640 | return false; | |
1641 | if (!cr->cr_principal) | |
1642 | return false; | |
1643 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1644 | } | |
1645 | ||
c212cecf | 1646 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1647 | { |
1648 | static u32 current_clientid = 1; | |
1649 | ||
2c142baa | 1650 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1651 | clp->cl_clientid.cl_id = current_clientid++; |
1652 | } | |
1653 | ||
deda2faa BF |
1654 | static void gen_confirm(struct nfs4_client *clp) |
1655 | { | |
ab4684d1 | 1656 | __be32 verf[2]; |
deda2faa | 1657 | static u32 i; |
1da177e4 | 1658 | |
f419992c JL |
1659 | /* |
1660 | * This is opaque to client, so no need to byte-swap. Use | |
1661 | * __force to keep sparse happy | |
1662 | */ | |
1663 | verf[0] = (__force __be32)get_seconds(); | |
1664 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1665 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1666 | } |
1667 | ||
4770d722 JL |
1668 | static struct nfs4_stid * |
1669 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1670 | { |
3abdb607 BF |
1671 | struct nfs4_stid *ret; |
1672 | ||
1673 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1674 | if (!ret || !ret->sc_type) | |
1675 | return NULL; | |
1676 | return ret; | |
4d71ab87 BF |
1677 | } |
1678 | ||
4770d722 JL |
1679 | static struct nfs4_stid * |
1680 | find_stateid(struct nfs4_client *cl, stateid_t *t) | |
1681 | { | |
1682 | struct nfs4_stid *ret; | |
1683 | ||
1684 | spin_lock(&cl->cl_lock); | |
1685 | ret = find_stateid_locked(cl, t); | |
1686 | spin_unlock(&cl->cl_lock); | |
1687 | return ret; | |
1688 | } | |
1689 | ||
1690 | static struct nfs4_stid * | |
1691 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1692 | { |
1693 | struct nfs4_stid *s; | |
4d71ab87 | 1694 | |
4770d722 JL |
1695 | spin_lock(&cl->cl_lock); |
1696 | s = find_stateid_locked(cl, t); | |
1697 | if (s != NULL && !(typemask & s->sc_type)) | |
1698 | s = NULL; | |
1699 | spin_unlock(&cl->cl_lock); | |
1700 | return s; | |
4581d140 BF |
1701 | } |
1702 | ||
2216d449 | 1703 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1704 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1705 | { | |
1706 | struct nfs4_client *clp; | |
1707 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1708 | int ret; |
c212cecf | 1709 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1710 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1711 | |
1712 | clp = alloc_client(name); | |
1713 | if (clp == NULL) | |
1714 | return NULL; | |
1715 | ||
03a4e1f6 BF |
1716 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1717 | if (ret) { | |
c9a49628 | 1718 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1719 | free_client(clp); |
c9a49628 | 1720 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1721 | return NULL; |
b09333c4 | 1722 | } |
02e1215f | 1723 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1724 | clp->cl_time = get_seconds(); |
b09333c4 | 1725 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1726 | copy_verf(clp, verf); |
1727 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1728 | gen_confirm(clp); |
edd76786 | 1729 | clp->cl_cb_session = NULL; |
c212cecf | 1730 | clp->net = net; |
b09333c4 RL |
1731 | return clp; |
1732 | } | |
1733 | ||
fd39ca9a | 1734 | static void |
ac55fdc4 JL |
1735 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1736 | { | |
1737 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1738 | struct nfs4_client *clp; | |
1739 | ||
1740 | while (*new) { | |
1741 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1742 | parent = *new; | |
1743 | ||
1744 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1745 | new = &((*new)->rb_left); | |
1746 | else | |
1747 | new = &((*new)->rb_right); | |
1748 | } | |
1749 | ||
1750 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1751 | rb_insert_color(&new_clp->cl_namenode, root); | |
1752 | } | |
1753 | ||
1754 | static struct nfs4_client * | |
1755 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1756 | { | |
1757 | long long cmp; | |
1758 | struct rb_node *node = root->rb_node; | |
1759 | struct nfs4_client *clp; | |
1760 | ||
1761 | while (node) { | |
1762 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1763 | cmp = compare_blob(&clp->cl_name, name); | |
1764 | if (cmp > 0) | |
1765 | node = node->rb_left; | |
1766 | else if (cmp < 0) | |
1767 | node = node->rb_right; | |
1768 | else | |
1769 | return clp; | |
1770 | } | |
1771 | return NULL; | |
1772 | } | |
1773 | ||
1774 | static void | |
1775 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1776 | { |
1777 | unsigned int idhashval; | |
0a7ec377 | 1778 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1779 | |
ac55fdc4 | 1780 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1781 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1782 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1783 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1784 | renew_client(clp); |
1da177e4 LT |
1785 | } |
1786 | ||
fd39ca9a | 1787 | static void |
1da177e4 LT |
1788 | move_to_confirmed(struct nfs4_client *clp) |
1789 | { | |
1790 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1791 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1792 | |
1793 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1794 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1795 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1796 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1797 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1798 | renew_client(clp); |
1799 | } | |
1800 | ||
1801 | static struct nfs4_client * | |
bfa85e83 | 1802 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1803 | { |
1804 | struct nfs4_client *clp; | |
1805 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1806 | ||
bfa85e83 | 1807 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1808 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1809 | if ((bool)clp->cl_minorversion != sessions) |
1810 | return NULL; | |
a50d2ad1 | 1811 | renew_client(clp); |
1da177e4 | 1812 | return clp; |
a50d2ad1 | 1813 | } |
1da177e4 LT |
1814 | } |
1815 | return NULL; | |
1816 | } | |
1817 | ||
bfa85e83 BF |
1818 | static struct nfs4_client * |
1819 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1820 | { | |
1821 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1822 | ||
1823 | return find_client_in_id_table(tbl, clid, sessions); | |
1824 | } | |
1825 | ||
1da177e4 | 1826 | static struct nfs4_client * |
0a7ec377 | 1827 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1828 | { |
bfa85e83 | 1829 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1830 | |
bfa85e83 | 1831 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1832 | } |
1833 | ||
6e5f15c9 | 1834 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1835 | { |
6e5f15c9 | 1836 | return clp->cl_exchange_flags != 0; |
e203d506 | 1837 | } |
a1bcecd2 | 1838 | |
28ce6054 | 1839 | static struct nfs4_client * |
382a62e7 | 1840 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1841 | { |
382a62e7 | 1842 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1843 | } |
1844 | ||
1845 | static struct nfs4_client * | |
a99454aa | 1846 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1847 | { |
a99454aa | 1848 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1849 | } |
1850 | ||
fd39ca9a | 1851 | static void |
6f3d772f | 1852 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1853 | { |
07263f1e | 1854 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1855 | struct sockaddr *sa = svc_addr(rqstp); |
1856 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1857 | unsigned short expected_family; |
1858 | ||
1859 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1860 | if (se->se_callback_netid_len == 3 && | |
1861 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1862 | expected_family = AF_INET; | |
1863 | else if (se->se_callback_netid_len == 4 && | |
1864 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1865 | expected_family = AF_INET6; | |
1866 | else | |
1da177e4 LT |
1867 | goto out_err; |
1868 | ||
c212cecf | 1869 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1870 | se->se_callback_addr_len, |
07263f1e BF |
1871 | (struct sockaddr *)&conn->cb_addr, |
1872 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1873 | |
07263f1e | 1874 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1875 | goto out_err; |
aa9a4ec7 | 1876 | |
07263f1e BF |
1877 | if (conn->cb_addr.ss_family == AF_INET6) |
1878 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1879 | |
07263f1e BF |
1880 | conn->cb_prog = se->se_callback_prog; |
1881 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1882 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1883 | return; |
1884 | out_err: | |
07263f1e BF |
1885 | conn->cb_addr.ss_family = AF_UNSPEC; |
1886 | conn->cb_addrlen = 0; | |
849823c5 | 1887 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1888 | "will not receive delegations\n", |
1889 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1890 | ||
1da177e4 LT |
1891 | return; |
1892 | } | |
1893 | ||
074fe897 | 1894 | /* |
067e1ace | 1895 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1896 | */ |
b607664e | 1897 | static void |
074fe897 | 1898 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1899 | { |
f5236013 | 1900 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1901 | struct nfsd4_slot *slot = resp->cstate.slot; |
1902 | unsigned int base; | |
074fe897 | 1903 | |
557ce264 | 1904 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1905 | |
557ce264 AA |
1906 | slot->sl_opcnt = resp->opcnt; |
1907 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1908 | |
bf5c43c8 | 1909 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1910 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1911 | slot->sl_datalen = 0; |
bf864a31 | 1912 | return; |
074fe897 | 1913 | } |
f5236013 BF |
1914 | base = resp->cstate.data_offset; |
1915 | slot->sl_datalen = buf->len - base; | |
1916 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1917 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1918 | return; | |
074fe897 AA |
1919 | } |
1920 | ||
1921 | /* | |
abfabf8c AA |
1922 | * Encode the replay sequence operation from the slot values. |
1923 | * If cachethis is FALSE encode the uncached rep error on the next | |
1924 | * operation which sets resp->p and increments resp->opcnt for | |
1925 | * nfs4svc_encode_compoundres. | |
074fe897 | 1926 | * |
074fe897 | 1927 | */ |
abfabf8c AA |
1928 | static __be32 |
1929 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1930 | struct nfsd4_compoundres *resp) | |
074fe897 | 1931 | { |
abfabf8c AA |
1932 | struct nfsd4_op *op; |
1933 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1934 | |
abfabf8c AA |
1935 | /* Encode the replayed sequence operation */ |
1936 | op = &args->ops[resp->opcnt - 1]; | |
1937 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1938 | |
abfabf8c | 1939 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1940 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1941 | op = &args->ops[resp->opcnt++]; |
1942 | op->status = nfserr_retry_uncached_rep; | |
1943 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1944 | } |
abfabf8c | 1945 | return op->status; |
074fe897 AA |
1946 | } |
1947 | ||
1948 | /* | |
557ce264 AA |
1949 | * The sequence operation is not cached because we can use the slot and |
1950 | * session values. | |
074fe897 | 1951 | */ |
3ca2eb98 | 1952 | static __be32 |
bf864a31 AA |
1953 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1954 | struct nfsd4_sequence *seq) | |
074fe897 | 1955 | { |
557ce264 | 1956 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1957 | struct xdr_stream *xdr = &resp->xdr; |
1958 | __be32 *p; | |
074fe897 AA |
1959 | __be32 status; |
1960 | ||
557ce264 | 1961 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1962 | |
abfabf8c | 1963 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1964 | if (status) |
abfabf8c | 1965 | return status; |
074fe897 | 1966 | |
f5236013 BF |
1967 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1968 | if (!p) { | |
1969 | WARN_ON_ONCE(1); | |
1970 | return nfserr_serverfault; | |
1971 | } | |
1972 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1973 | xdr_commit_encode(xdr); | |
074fe897 | 1974 | |
557ce264 | 1975 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1976 | return slot->sl_status; |
074fe897 AA |
1977 | } |
1978 | ||
0733d213 AA |
1979 | /* |
1980 | * Set the exchange_id flags returned by the server. | |
1981 | */ | |
1982 | static void | |
1983 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1984 | { | |
1985 | /* pNFS is not supported */ | |
1986 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1987 | ||
1988 | /* Referrals are supported, Migration is not. */ | |
1989 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1990 | ||
1991 | /* set the wire flags to return to client. */ | |
1992 | clid->flags = new->cl_exchange_flags; | |
1993 | } | |
1994 | ||
631fc9ea BF |
1995 | static bool client_has_state(struct nfs4_client *clp) |
1996 | { | |
1997 | /* | |
1998 | * Note clp->cl_openowners check isn't quite right: there's no | |
1999 | * need to count owners without stateid's. | |
2000 | * | |
2001 | * Also note we should probably be using this in 4.0 case too. | |
2002 | */ | |
6eccece9 BF |
2003 | return !list_empty(&clp->cl_openowners) |
2004 | || !list_empty(&clp->cl_delegations) | |
2005 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2006 | } |
2007 | ||
069b6ad4 AA |
2008 | __be32 |
2009 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2010 | struct nfsd4_compound_state *cstate, | |
2011 | struct nfsd4_exchange_id *exid) | |
2012 | { | |
0733d213 | 2013 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 2014 | __be32 status; |
363168b4 | 2015 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2016 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2017 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2018 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2019 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2020 | |
363168b4 | 2021 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2022 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2023 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2024 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2025 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2026 | |
a084daf5 | 2027 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2028 | return nfserr_inval; |
2029 | ||
0733d213 | 2030 | switch (exid->spa_how) { |
57266a6e BF |
2031 | case SP4_MACH_CRED: |
2032 | if (!svc_rqst_integrity_protected(rqstp)) | |
2033 | return nfserr_inval; | |
0733d213 AA |
2034 | case SP4_NONE: |
2035 | break; | |
063b0fb9 BF |
2036 | default: /* checked by xdr code */ |
2037 | WARN_ON_ONCE(1); | |
0733d213 | 2038 | case SP4_SSV: |
dd30333c | 2039 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2040 | } |
2041 | ||
2dbb269d | 2042 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2043 | nfs4_lock_state(); |
382a62e7 | 2044 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2045 | if (conf) { |
83e08fd4 BF |
2046 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2047 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2048 | ||
136e658d BF |
2049 | if (update) { |
2050 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2051 | status = nfserr_inval; |
1a308118 BF |
2052 | goto out; |
2053 | } | |
57266a6e BF |
2054 | if (!mach_creds_match(conf, rqstp)) { |
2055 | status = nfserr_wrong_cred; | |
2056 | goto out; | |
2057 | } | |
136e658d | 2058 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2059 | status = nfserr_perm; |
136e658d BF |
2060 | goto out; |
2061 | } | |
2062 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2063 | status = nfserr_not_same; |
2064 | goto out; | |
2065 | } | |
136e658d BF |
2066 | /* case 6 */ |
2067 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
2068 | new = conf; | |
2069 | goto out_copy; | |
0733d213 | 2070 | } |
136e658d | 2071 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2072 | if (client_has_state(conf)) { |
2073 | status = nfserr_clid_inuse; | |
0733d213 AA |
2074 | goto out; |
2075 | } | |
2076 | expire_client(conf); | |
2077 | goto out_new; | |
2078 | } | |
136e658d | 2079 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2080 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2081 | new = conf; |
2082 | goto out_copy; | |
2083 | } | |
2084 | /* case 5, client reboot */ | |
136e658d | 2085 | goto out_new; |
6ddbbbfe MS |
2086 | } |
2087 | ||
2dbb269d | 2088 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2089 | status = nfserr_noent; |
2090 | goto out; | |
0733d213 AA |
2091 | } |
2092 | ||
a99454aa | 2093 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2094 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 2095 | expire_client(unconf); |
0733d213 | 2096 | |
2dbb269d | 2097 | /* case 1 (normal case) */ |
0733d213 | 2098 | out_new: |
2216d449 | 2099 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2100 | if (new == NULL) { |
4731030d | 2101 | status = nfserr_jukebox; |
0733d213 AA |
2102 | goto out; |
2103 | } | |
4f540e29 | 2104 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2105 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2106 | |
c212cecf | 2107 | gen_clid(new, nn); |
ac55fdc4 | 2108 | add_to_unconfirmed(new); |
0733d213 AA |
2109 | out_copy: |
2110 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2111 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2112 | ||
778df3f0 | 2113 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2114 | nfsd4_set_ex_flags(new, exid); |
2115 | ||
2116 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2117 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2118 | status = nfs_ok; |
2119 | ||
2120 | out: | |
2121 | nfs4_unlock_state(); | |
0733d213 | 2122 | return status; |
069b6ad4 AA |
2123 | } |
2124 | ||
57b7b43b | 2125 | static __be32 |
88e588d5 | 2126 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2127 | { |
88e588d5 AA |
2128 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2129 | slot_seqid); | |
b85d4c01 BH |
2130 | |
2131 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2132 | if (slot_inuse) { |
2133 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2134 | return nfserr_jukebox; |
2135 | else | |
2136 | return nfserr_seq_misordered; | |
2137 | } | |
f6d82485 | 2138 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2139 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2140 | return nfs_ok; |
88e588d5 | 2141 | if (seqid == slot_seqid) |
b85d4c01 | 2142 | return nfserr_replay_cache; |
b85d4c01 BH |
2143 | return nfserr_seq_misordered; |
2144 | } | |
2145 | ||
49557cc7 AA |
2146 | /* |
2147 | * Cache the create session result into the create session single DRC | |
2148 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2149 | * Do this for solo or embedded create session operations. | |
2150 | */ | |
2151 | static void | |
2152 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2153 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2154 | { |
2155 | slot->sl_status = nfserr; | |
2156 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2157 | } | |
2158 | ||
2159 | static __be32 | |
2160 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2161 | struct nfsd4_clid_slot *slot) | |
2162 | { | |
2163 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2164 | return slot->sl_status; | |
2165 | } | |
2166 | ||
1b74c25b MJ |
2167 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2168 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2169 | 1 + /* MIN tag is length with zero, only length */ \ | |
2170 | 3 + /* version, opcount, opcode */ \ | |
2171 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2172 | /* seqid, slotID, slotID, cache */ \ | |
2173 | 4 ) * sizeof(__be32)) | |
2174 | ||
2175 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2176 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2177 | 1 + /* status */ \ | |
2178 | 1 + /* MIN tag is length with zero, only length */ \ | |
2179 | 3 + /* opcount, opcode, opstatus*/ \ | |
2180 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2181 | /* seqid, slotID, slotID, slotID, status */ \ | |
2182 | 5 ) * sizeof(__be32)) | |
2183 | ||
55c760cf | 2184 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2185 | { |
55c760cf BF |
2186 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2187 | ||
373cd409 BF |
2188 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2189 | return nfserr_toosmall; | |
2190 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2191 | return nfserr_toosmall; | |
55c760cf BF |
2192 | ca->headerpadsz = 0; |
2193 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2194 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2195 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2196 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2197 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2198 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2199 | /* | |
2200 | * Note decreasing slot size below client's request may make it | |
2201 | * difficult for client to function correctly, whereas | |
2202 | * decreasing the number of slots will (just?) affect | |
2203 | * performance. When short on memory we therefore prefer to | |
2204 | * decrease number of slots instead of their size. Clients that | |
2205 | * request larger slots than they need will get poor results: | |
2206 | */ | |
2207 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2208 | if (!ca->maxreqs) | |
2209 | return nfserr_jukebox; | |
2210 | ||
373cd409 | 2211 | return nfs_ok; |
1b74c25b MJ |
2212 | } |
2213 | ||
8a891633 KM |
2214 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2215 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2216 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2217 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2218 | ||
06b332a5 | 2219 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2220 | { |
06b332a5 BF |
2221 | ca->headerpadsz = 0; |
2222 | ||
2223 | /* | |
2224 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2225 | * don't even do gss on the backchannel yet. But this is still | |
2226 | * less than 1k. Tighten up this estimate in the unlikely event | |
2227 | * it turns out to be a problem for some client: | |
2228 | */ | |
8a891633 | 2229 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2230 | return nfserr_toosmall; |
8a891633 | 2231 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2232 | return nfserr_toosmall; |
2233 | ca->maxresp_cached = 0; | |
2234 | if (ca->maxops < 2) | |
2235 | return nfserr_toosmall; | |
2236 | ||
2237 | return nfs_ok; | |
1b74c25b MJ |
2238 | } |
2239 | ||
b78724b7 BF |
2240 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2241 | { | |
2242 | switch (cbs->flavor) { | |
2243 | case RPC_AUTH_NULL: | |
2244 | case RPC_AUTH_UNIX: | |
2245 | return nfs_ok; | |
2246 | default: | |
2247 | /* | |
2248 | * GSS case: the spec doesn't allow us to return this | |
2249 | * error. But it also doesn't allow us not to support | |
2250 | * GSS. | |
2251 | * I'd rather this fail hard than return some error the | |
2252 | * client might think it can already handle: | |
2253 | */ | |
2254 | return nfserr_encr_alg_unsupp; | |
2255 | } | |
2256 | } | |
2257 | ||
069b6ad4 AA |
2258 | __be32 |
2259 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2260 | struct nfsd4_compound_state *cstate, | |
2261 | struct nfsd4_create_session *cr_ses) | |
2262 | { | |
363168b4 | 2263 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2264 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2265 | struct nfsd4_session *new; |
81f0b2a4 | 2266 | struct nfsd4_conn *conn; |
49557cc7 | 2267 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2268 | __be32 status = 0; |
8daae4dc | 2269 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2270 | |
a62573dc MJ |
2271 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2272 | return nfserr_inval; | |
b78724b7 BF |
2273 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2274 | if (status) | |
2275 | return status; | |
55c760cf | 2276 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2277 | if (status) |
2278 | return status; | |
2279 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2280 | if (status) |
f403e450 | 2281 | goto out_release_drc_mem; |
81f0b2a4 | 2282 | status = nfserr_jukebox; |
60810e54 | 2283 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2284 | if (!new) |
2285 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2286 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2287 | if (!conn) | |
2288 | goto out_free_session; | |
a62573dc | 2289 | |
ec6b5d7b | 2290 | nfs4_lock_state(); |
0a7ec377 | 2291 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2292 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2293 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2294 | |
2295 | if (conf) { | |
57266a6e BF |
2296 | status = nfserr_wrong_cred; |
2297 | if (!mach_creds_match(conf, rqstp)) | |
2298 | goto out_free_conn; | |
49557cc7 AA |
2299 | cs_slot = &conf->cl_cs_slot; |
2300 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2301 | if (status == nfserr_replay_cache) { |
49557cc7 | 2302 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2303 | goto out_free_conn; |
49557cc7 | 2304 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2305 | status = nfserr_seq_misordered; |
81f0b2a4 | 2306 | goto out_free_conn; |
ec6b5d7b | 2307 | } |
ec6b5d7b | 2308 | } else if (unconf) { |
8f9d3d3b | 2309 | struct nfs4_client *old; |
ec6b5d7b | 2310 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2311 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2312 | status = nfserr_clid_inuse; |
81f0b2a4 | 2313 | goto out_free_conn; |
ec6b5d7b | 2314 | } |
57266a6e BF |
2315 | status = nfserr_wrong_cred; |
2316 | if (!mach_creds_match(unconf, rqstp)) | |
2317 | goto out_free_conn; | |
49557cc7 AA |
2318 | cs_slot = &unconf->cl_cs_slot; |
2319 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2320 | if (status) { |
2321 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2322 | status = nfserr_seq_misordered; |
81f0b2a4 | 2323 | goto out_free_conn; |
ec6b5d7b | 2324 | } |
382a62e7 | 2325 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2326 | if (old) { |
2327 | status = mark_client_expired(old); | |
2328 | if (status) | |
2329 | goto out_free_conn; | |
8f9d3d3b | 2330 | expire_client(old); |
221a6876 | 2331 | } |
8f9d3d3b | 2332 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2333 | conf = unconf; |
2334 | } else { | |
2335 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2336 | goto out_free_conn; |
ec6b5d7b | 2337 | } |
81f0b2a4 | 2338 | status = nfs_ok; |
408b79bc BF |
2339 | /* |
2340 | * We do not support RDMA or persistent sessions | |
2341 | */ | |
2342 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2343 | cr_ses->flags &= ~SESSION4_RDMA; | |
2344 | ||
81f0b2a4 BF |
2345 | init_session(rqstp, new, conf, cr_ses); |
2346 | nfsd4_init_conn(rqstp, conn, new); | |
2347 | ||
ac7c46f2 | 2348 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2349 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2350 | cs_slot->sl_seqid++; |
49557cc7 | 2351 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2352 | |
49557cc7 AA |
2353 | /* cache solo and embedded create sessions under the state lock */ |
2354 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2355 | nfs4_unlock_state(); |
ec6b5d7b | 2356 | return status; |
81f0b2a4 | 2357 | out_free_conn: |
266533c6 | 2358 | nfs4_unlock_state(); |
81f0b2a4 BF |
2359 | free_conn(conn); |
2360 | out_free_session: | |
2361 | __free_session(new); | |
55c760cf BF |
2362 | out_release_drc_mem: |
2363 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2364 | return status; |
069b6ad4 AA |
2365 | } |
2366 | ||
1d1bc8f2 BF |
2367 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2368 | { | |
2369 | switch (*dir) { | |
2370 | case NFS4_CDFC4_FORE: | |
2371 | case NFS4_CDFC4_BACK: | |
2372 | return nfs_ok; | |
2373 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2374 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2375 | *dir = NFS4_CDFC4_BOTH; | |
2376 | return nfs_ok; | |
2377 | }; | |
2378 | return nfserr_inval; | |
2379 | } | |
2380 | ||
cb73a9f4 BF |
2381 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2382 | { | |
2383 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2384 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2385 | __be32 status; |
cb73a9f4 | 2386 | |
b78724b7 BF |
2387 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2388 | if (status) | |
2389 | return status; | |
c9a49628 | 2390 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2391 | session->se_cb_prog = bc->bc_cb_program; |
2392 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2393 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2394 | |
2395 | nfsd4_probe_callback(session->se_client); | |
2396 | ||
2397 | return nfs_ok; | |
2398 | } | |
2399 | ||
1d1bc8f2 BF |
2400 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2401 | struct nfsd4_compound_state *cstate, | |
2402 | struct nfsd4_bind_conn_to_session *bcts) | |
2403 | { | |
2404 | __be32 status; | |
3ba63671 | 2405 | struct nfsd4_conn *conn; |
4f6e6c17 | 2406 | struct nfsd4_session *session; |
d4e19e70 TM |
2407 | struct net *net = SVC_NET(rqstp); |
2408 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2409 | |
2410 | if (!nfsd4_last_compound_op(rqstp)) | |
2411 | return nfserr_not_only_op; | |
4f6e6c17 | 2412 | nfs4_lock_state(); |
c9a49628 | 2413 | spin_lock(&nn->client_lock); |
d4e19e70 | 2414 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2415 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2416 | if (!session) |
d4e19e70 | 2417 | goto out_no_session; |
57266a6e BF |
2418 | status = nfserr_wrong_cred; |
2419 | if (!mach_creds_match(session->se_client, rqstp)) | |
2420 | goto out; | |
1d1bc8f2 | 2421 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2422 | if (status) |
4f6e6c17 | 2423 | goto out; |
3ba63671 | 2424 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2425 | status = nfserr_jukebox; |
3ba63671 | 2426 | if (!conn) |
4f6e6c17 BF |
2427 | goto out; |
2428 | nfsd4_init_conn(rqstp, conn, session); | |
2429 | status = nfs_ok; | |
2430 | out: | |
d4e19e70 TM |
2431 | nfsd4_put_session(session); |
2432 | out_no_session: | |
4f6e6c17 BF |
2433 | nfs4_unlock_state(); |
2434 | return status; | |
1d1bc8f2 BF |
2435 | } |
2436 | ||
5d4cec2f BF |
2437 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2438 | { | |
2439 | if (!session) | |
2440 | return 0; | |
2441 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2442 | } | |
2443 | ||
069b6ad4 AA |
2444 | __be32 |
2445 | nfsd4_destroy_session(struct svc_rqst *r, | |
2446 | struct nfsd4_compound_state *cstate, | |
2447 | struct nfsd4_destroy_session *sessionid) | |
2448 | { | |
e10e0cfc | 2449 | struct nfsd4_session *ses; |
abcdff09 | 2450 | __be32 status; |
f0f51f5c | 2451 | int ref_held_by_me = 0; |
d4e19e70 TM |
2452 | struct net *net = SVC_NET(r); |
2453 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2454 | |
abcdff09 BF |
2455 | nfs4_lock_state(); |
2456 | status = nfserr_not_only_op; | |
5d4cec2f | 2457 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2458 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2459 | goto out; |
f0f51f5c | 2460 | ref_held_by_me++; |
57716355 | 2461 | } |
e10e0cfc | 2462 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2463 | spin_lock(&nn->client_lock); |
d4e19e70 | 2464 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2465 | if (!ses) |
2466 | goto out_client_lock; | |
57266a6e BF |
2467 | status = nfserr_wrong_cred; |
2468 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2469 | goto out_put_session; |
f0f51f5c | 2470 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2471 | if (status) |
f0f51f5c | 2472 | goto out_put_session; |
e10e0cfc | 2473 | unhash_session(ses); |
c9a49628 | 2474 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2475 | |
84f5f7cc | 2476 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2477 | |
c9a49628 | 2478 | spin_lock(&nn->client_lock); |
e10e0cfc | 2479 | status = nfs_ok; |
f0f51f5c | 2480 | out_put_session: |
d4e19e70 | 2481 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2482 | out_client_lock: |
2483 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2484 | out: |
abcdff09 | 2485 | nfs4_unlock_state(); |
e10e0cfc | 2486 | return status; |
069b6ad4 AA |
2487 | } |
2488 | ||
a663bdd8 | 2489 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2490 | { |
2491 | struct nfsd4_conn *c; | |
2492 | ||
2493 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2494 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2495 | return c; |
2496 | } | |
2497 | } | |
2498 | return NULL; | |
2499 | } | |
2500 | ||
57266a6e | 2501 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2502 | { |
2503 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2504 | struct nfsd4_conn *c; |
57266a6e | 2505 | __be32 status = nfs_ok; |
21b75b01 | 2506 | int ret; |
328ead28 BF |
2507 | |
2508 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2509 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2510 | if (c) |
2511 | goto out_free; | |
2512 | status = nfserr_conn_not_bound_to_session; | |
2513 | if (clp->cl_mach_cred) | |
2514 | goto out_free; | |
328ead28 BF |
2515 | __nfsd4_hash_conn(new, ses); |
2516 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2517 | ret = nfsd4_register_conn(new); |
2518 | if (ret) | |
2519 | /* oops; xprt is already down: */ | |
2520 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2521 | return nfs_ok; |
2522 | out_free: | |
2523 | spin_unlock(&clp->cl_lock); | |
2524 | free_conn(new); | |
2525 | return status; | |
328ead28 BF |
2526 | } |
2527 | ||
868b89c3 MJ |
2528 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2529 | { | |
2530 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2531 | ||
2532 | return args->opcnt > session->se_fchannel.maxops; | |
2533 | } | |
2534 | ||
ae82a8d0 MJ |
2535 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2536 | struct nfsd4_session *session) | |
2537 | { | |
2538 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2539 | ||
2540 | return xb->len > session->se_fchannel.maxreq_sz; | |
2541 | } | |
2542 | ||
069b6ad4 | 2543 | __be32 |
b85d4c01 | 2544 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2545 | struct nfsd4_compound_state *cstate, |
2546 | struct nfsd4_sequence *seq) | |
2547 | { | |
f9bb94c4 | 2548 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2549 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2550 | struct nfsd4_session *session; |
221a6876 | 2551 | struct nfs4_client *clp; |
b85d4c01 | 2552 | struct nfsd4_slot *slot; |
a663bdd8 | 2553 | struct nfsd4_conn *conn; |
57b7b43b | 2554 | __be32 status; |
47ee5298 | 2555 | int buflen; |
d4e19e70 TM |
2556 | struct net *net = SVC_NET(rqstp); |
2557 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2558 | |
f9bb94c4 AA |
2559 | if (resp->opcnt != 1) |
2560 | return nfserr_sequence_pos; | |
2561 | ||
a663bdd8 BF |
2562 | /* |
2563 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2564 | * below. | |
2565 | */ | |
2566 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2567 | if (!conn) | |
2568 | return nfserr_jukebox; | |
2569 | ||
c9a49628 | 2570 | spin_lock(&nn->client_lock); |
d4e19e70 | 2571 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2572 | if (!session) |
221a6876 BF |
2573 | goto out_no_session; |
2574 | clp = session->se_client; | |
b85d4c01 | 2575 | |
868b89c3 MJ |
2576 | status = nfserr_too_many_ops; |
2577 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2578 | goto out_put_session; |
868b89c3 | 2579 | |
ae82a8d0 MJ |
2580 | status = nfserr_req_too_big; |
2581 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2582 | goto out_put_session; |
ae82a8d0 | 2583 | |
b85d4c01 | 2584 | status = nfserr_badslot; |
6c18ba9f | 2585 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2586 | goto out_put_session; |
b85d4c01 | 2587 | |
557ce264 | 2588 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2589 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2590 | ||
a8dfdaeb AA |
2591 | /* We do not negotiate the number of slots yet, so set the |
2592 | * maxslots to the session maxreqs which is used to encode | |
2593 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2594 | seq->maxslots = session->se_fchannel.maxreqs; | |
2595 | ||
73e79482 BF |
2596 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2597 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2598 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2599 | status = nfserr_seq_misordered; |
2600 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2601 | goto out_put_session; |
b85d4c01 BH |
2602 | cstate->slot = slot; |
2603 | cstate->session = session; | |
4b24ca7d | 2604 | cstate->clp = clp; |
da3846a2 | 2605 | /* Return the cached reply status and set cstate->status |
557ce264 | 2606 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2607 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2608 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2609 | goto out; |
b85d4c01 BH |
2610 | } |
2611 | if (status) | |
66b2b9b2 | 2612 | goto out_put_session; |
b85d4c01 | 2613 | |
57266a6e | 2614 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2615 | conn = NULL; |
57266a6e BF |
2616 | if (status) |
2617 | goto out_put_session; | |
328ead28 | 2618 | |
47ee5298 BF |
2619 | buflen = (seq->cachethis) ? |
2620 | session->se_fchannel.maxresp_cached : | |
2621 | session->se_fchannel.maxresp_sz; | |
2622 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2623 | nfserr_rep_too_big; | |
a5cddc88 | 2624 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2625 | goto out_put_session; |
32aaa62e | 2626 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2627 | |
2628 | status = nfs_ok; | |
b85d4c01 | 2629 | /* Success! bump slot seqid */ |
b85d4c01 | 2630 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2631 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2632 | if (seq->cachethis) |
2633 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2634 | else |
2635 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2636 | |
2637 | cstate->slot = slot; | |
2638 | cstate->session = session; | |
4b24ca7d | 2639 | cstate->clp = clp; |
b85d4c01 | 2640 | |
b85d4c01 | 2641 | out: |
221a6876 BF |
2642 | switch (clp->cl_cb_state) { |
2643 | case NFSD4_CB_DOWN: | |
2644 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2645 | break; | |
2646 | case NFSD4_CB_FAULT: | |
2647 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2648 | break; | |
2649 | default: | |
2650 | seq->status_flags = 0; | |
aaf84eb9 | 2651 | } |
3bd64a5b BF |
2652 | if (!list_empty(&clp->cl_revoked)) |
2653 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2654 | out_no_session: |
3f42d2c4 KM |
2655 | if (conn) |
2656 | free_conn(conn); | |
c9a49628 | 2657 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2658 | return status; |
66b2b9b2 | 2659 | out_put_session: |
d4e19e70 | 2660 | nfsd4_put_session_locked(session); |
221a6876 | 2661 | goto out_no_session; |
069b6ad4 AA |
2662 | } |
2663 | ||
b607664e TM |
2664 | void |
2665 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2666 | { | |
2667 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2668 | ||
2669 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2670 | if (cs->status != nfserr_replay_cache) { |
2671 | nfsd4_store_cache_entry(resp); | |
2672 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2673 | } | |
d4e19e70 | 2674 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2675 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2676 | } else if (cs->clp) |
2677 | put_client_renew(cs->clp); | |
b607664e TM |
2678 | } |
2679 | ||
345c2842 MJ |
2680 | __be32 |
2681 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2682 | { | |
2683 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2684 | __be32 status = 0; |
8daae4dc | 2685 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2686 | |
2687 | nfs4_lock_state(); | |
0a7ec377 | 2688 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2689 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2690 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2691 | |
2692 | if (conf) { | |
2693 | clp = conf; | |
2694 | ||
c0293b01 | 2695 | if (client_has_state(conf)) { |
345c2842 MJ |
2696 | status = nfserr_clientid_busy; |
2697 | goto out; | |
2698 | } | |
2699 | } else if (unconf) | |
2700 | clp = unconf; | |
2701 | else { | |
2702 | status = nfserr_stale_clientid; | |
2703 | goto out; | |
2704 | } | |
57266a6e BF |
2705 | if (!mach_creds_match(clp, rqstp)) { |
2706 | status = nfserr_wrong_cred; | |
2707 | goto out; | |
2708 | } | |
345c2842 MJ |
2709 | expire_client(clp); |
2710 | out: | |
2711 | nfs4_unlock_state(); | |
345c2842 MJ |
2712 | return status; |
2713 | } | |
2714 | ||
4dc6ec00 BF |
2715 | __be32 |
2716 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2717 | { | |
57b7b43b | 2718 | __be32 status = 0; |
bcecf1cc | 2719 | |
4dc6ec00 BF |
2720 | if (rc->rca_one_fs) { |
2721 | if (!cstate->current_fh.fh_dentry) | |
2722 | return nfserr_nofilehandle; | |
2723 | /* | |
2724 | * We don't take advantage of the rca_one_fs case. | |
2725 | * That's OK, it's optional, we can safely ignore it. | |
2726 | */ | |
2727 | return nfs_ok; | |
2728 | } | |
bcecf1cc | 2729 | |
4dc6ec00 | 2730 | nfs4_lock_state(); |
bcecf1cc | 2731 | status = nfserr_complete_already; |
a52d726b JL |
2732 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2733 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2734 | goto out; |
2735 | ||
2736 | status = nfserr_stale_clientid; | |
2737 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2738 | /* |
2739 | * The following error isn't really legal. | |
2740 | * But we only get here if the client just explicitly | |
2741 | * destroyed the client. Surely it no longer cares what | |
2742 | * error it gets back on an operation for the dead | |
2743 | * client. | |
2744 | */ | |
bcecf1cc MJ |
2745 | goto out; |
2746 | ||
2747 | status = nfs_ok; | |
2a4317c5 | 2748 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2749 | out: |
4dc6ec00 | 2750 | nfs4_unlock_state(); |
bcecf1cc | 2751 | return status; |
4dc6ec00 BF |
2752 | } |
2753 | ||
b37ad28b | 2754 | __be32 |
b591480b BF |
2755 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2756 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2757 | { |
a084daf5 | 2758 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2759 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2760 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2761 | __be32 status; |
c212cecf SK |
2762 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2763 | ||
63db4632 | 2764 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2765 | nfs4_lock_state(); |
382a62e7 | 2766 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2767 | if (conf) { |
63db4632 | 2768 | /* case 0: */ |
1da177e4 | 2769 | status = nfserr_clid_inuse; |
e203d506 BF |
2770 | if (clp_used_exchangeid(conf)) |
2771 | goto out; | |
026722c2 | 2772 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2773 | char addr_str[INET6_ADDRSTRLEN]; |
2774 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2775 | sizeof(addr_str)); | |
2776 | dprintk("NFSD: setclientid: string in use by client " | |
2777 | "at %s\n", addr_str); | |
1da177e4 LT |
2778 | goto out; |
2779 | } | |
1da177e4 | 2780 | } |
a99454aa | 2781 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2782 | if (unconf) |
2783 | expire_client(unconf); | |
3e772463 | 2784 | status = nfserr_jukebox; |
2216d449 | 2785 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2786 | if (new == NULL) |
2787 | goto out; | |
34b232bb | 2788 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2789 | /* case 1: probable callback update */ |
1da177e4 | 2790 | copy_clid(new, conf); |
34b232bb | 2791 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2792 | gen_clid(new, nn); |
8323c3b2 | 2793 | new->cl_minorversion = 0; |
6f3d772f | 2794 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2795 | add_to_unconfirmed(new); |
1da177e4 LT |
2796 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2797 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2798 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2799 | status = nfs_ok; | |
2800 | out: | |
2801 | nfs4_unlock_state(); | |
2802 | return status; | |
2803 | } | |
2804 | ||
2805 | ||
b37ad28b | 2806 | __be32 |
b591480b BF |
2807 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2808 | struct nfsd4_compound_state *cstate, | |
2809 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2810 | { |
21ab45a4 | 2811 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2812 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2813 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2814 | __be32 status; |
7f2210fa | 2815 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2816 | |
2c142baa | 2817 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2818 | return nfserr_stale_clientid; |
1da177e4 | 2819 | nfs4_lock_state(); |
21ab45a4 | 2820 | |
8daae4dc | 2821 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2822 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2823 | /* |
8695b90a BF |
2824 | * We try hard to give out unique clientid's, so if we get an |
2825 | * attempt to confirm the same clientid with a different cred, | |
2826 | * there's a bug somewhere. Let's charitably assume it's our | |
2827 | * bug. | |
a186e767 | 2828 | */ |
8695b90a BF |
2829 | status = nfserr_serverfault; |
2830 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2831 | goto out; | |
2832 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2833 | goto out; | |
63db4632 | 2834 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2835 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2836 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2837 | status = nfs_ok; |
90d700b7 BF |
2838 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2839 | status = nfserr_stale_clientid; | |
2840 | goto out; | |
2841 | } | |
2842 | status = nfs_ok; | |
2843 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2844 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2845 | nfsd4_probe_callback(conf); | |
2846 | expire_client(unconf); | |
90d700b7 | 2847 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2848 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2849 | if (conf) { |
2850 | status = mark_client_expired(conf); | |
2851 | if (status) | |
2852 | goto out; | |
8695b90a | 2853 | expire_client(conf); |
221a6876 | 2854 | } |
8695b90a | 2855 | move_to_confirmed(unconf); |
f3d03b92 | 2856 | nfsd4_probe_callback(unconf); |
08e8987c | 2857 | } |
1da177e4 | 2858 | out: |
1da177e4 LT |
2859 | nfs4_unlock_state(); |
2860 | return status; | |
2861 | } | |
2862 | ||
32513b40 BF |
2863 | static struct nfs4_file *nfsd4_alloc_file(void) |
2864 | { | |
2865 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2866 | } | |
2867 | ||
1da177e4 | 2868 | /* OPEN Share state helper functions */ |
f9c00c3a | 2869 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 2870 | { |
ca943217 | 2871 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 2872 | |
950e0118 TM |
2873 | lockdep_assert_held(&state_lock); |
2874 | ||
32513b40 | 2875 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2876 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2877 | INIT_LIST_HEAD(&fp->fi_stateids); |
2878 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 2879 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
2880 | fp->fi_had_conflict = false; |
2881 | fp->fi_lease = NULL; | |
baeb4ff0 | 2882 | fp->fi_share_deny = 0; |
32513b40 BF |
2883 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2884 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2885 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2886 | } |
2887 | ||
e8ff2a84 | 2888 | void |
1da177e4 LT |
2889 | nfsd4_free_slabs(void) |
2890 | { | |
abf1135b CH |
2891 | kmem_cache_destroy(openowner_slab); |
2892 | kmem_cache_destroy(lockowner_slab); | |
2893 | kmem_cache_destroy(file_slab); | |
2894 | kmem_cache_destroy(stateid_slab); | |
2895 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2896 | } |
1da177e4 | 2897 | |
72083396 | 2898 | int |
e60d4398 N |
2899 | nfsd4_init_slabs(void) |
2900 | { | |
fe0750e5 BF |
2901 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2902 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2903 | if (openowner_slab == NULL) | |
abf1135b | 2904 | goto out; |
fe0750e5 | 2905 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2906 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2907 | if (lockowner_slab == NULL) |
abf1135b | 2908 | goto out_free_openowner_slab; |
e60d4398 | 2909 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2910 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2911 | if (file_slab == NULL) |
abf1135b | 2912 | goto out_free_lockowner_slab; |
5ac049ac | 2913 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2914 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2915 | if (stateid_slab == NULL) |
abf1135b | 2916 | goto out_free_file_slab; |
5b2d21c1 | 2917 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2918 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2919 | if (deleg_slab == NULL) |
abf1135b | 2920 | goto out_free_stateid_slab; |
e60d4398 | 2921 | return 0; |
abf1135b CH |
2922 | |
2923 | out_free_stateid_slab: | |
2924 | kmem_cache_destroy(stateid_slab); | |
2925 | out_free_file_slab: | |
2926 | kmem_cache_destroy(file_slab); | |
2927 | out_free_lockowner_slab: | |
2928 | kmem_cache_destroy(lockowner_slab); | |
2929 | out_free_openowner_slab: | |
2930 | kmem_cache_destroy(openowner_slab); | |
2931 | out: | |
e60d4398 N |
2932 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2933 | return -ENOMEM; | |
1da177e4 LT |
2934 | } |
2935 | ||
ff194bd9 | 2936 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2937 | { |
ff194bd9 BF |
2938 | rp->rp_status = nfserr_serverfault; |
2939 | rp->rp_buflen = 0; | |
2940 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2941 | } |
2942 | ||
fe0750e5 | 2943 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2944 | { |
1da177e4 | 2945 | struct nfs4_stateowner *sop; |
1da177e4 | 2946 | |
fe0750e5 | 2947 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2948 | if (!sop) |
2949 | return NULL; | |
2950 | ||
2951 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2952 | if (!sop->so_owner.data) { | |
fe0750e5 | 2953 | kmem_cache_free(slab, sop); |
1da177e4 | 2954 | return NULL; |
ff194bd9 BF |
2955 | } |
2956 | sop->so_owner.len = owner->len; | |
2957 | ||
ea1da636 | 2958 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2959 | sop->so_client = clp; |
2960 | init_nfs4_replay(&sop->so_replay); | |
2961 | return sop; | |
2962 | } | |
2963 | ||
fe0750e5 | 2964 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2965 | { |
9b531137 SK |
2966 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2967 | ||
2968 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2969 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2970 | } |
2971 | ||
fe0750e5 | 2972 | static struct nfs4_openowner * |
13d6f66b | 2973 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
2974 | struct nfsd4_compound_state *cstate) |
2975 | { | |
13d6f66b | 2976 | struct nfs4_client *clp = cstate->clp; |
fe0750e5 | 2977 | struct nfs4_openowner *oo; |
ff194bd9 | 2978 | |
fe0750e5 BF |
2979 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2980 | if (!oo) | |
ff194bd9 | 2981 | return NULL; |
fe0750e5 BF |
2982 | oo->oo_owner.so_is_open_owner = 1; |
2983 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2984 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2985 | if (nfsd4_has_session(cstate)) |
2986 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2987 | oo->oo_time = 0; |
38c387b5 | 2988 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2989 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2990 | hash_openowner(oo, clp, strhashval); | |
2991 | return oo; | |
1da177e4 LT |
2992 | } |
2993 | ||
996e0938 | 2994 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2995 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2996 | |
3abdb607 | 2997 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 2998 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 2999 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
fe0750e5 | 3000 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 3001 | get_nfs4_file(fp); |
11b9164a | 3002 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3003 | stp->st_access_bmap = 0; |
3004 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3005 | stp->st_openstp = NULL; |
1d31a253 TM |
3006 | spin_lock(&fp->fi_lock); |
3007 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3008 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
3009 | } |
3010 | ||
fd39ca9a | 3011 | static void |
73758fed | 3012 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 3013 | { |
73758fed SK |
3014 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3015 | ||
fe0750e5 | 3016 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3017 | |
73758fed | 3018 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3019 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3020 | } |
3021 | ||
1da177e4 | 3022 | static int |
599e0a22 BF |
3023 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
3024 | clientid_t *clid) | |
3025 | { | |
3026 | return (sop->so_owner.len == owner->len) && | |
3027 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
3028 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
3029 | } |
3030 | ||
fe0750e5 | 3031 | static struct nfs4_openowner * |
9b531137 SK |
3032 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
3033 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 3034 | { |
a50d2ad1 BF |
3035 | struct nfs4_stateowner *so; |
3036 | struct nfs4_openowner *oo; | |
d15c077e | 3037 | struct nfs4_client *clp; |
1da177e4 | 3038 | |
9b531137 | 3039 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
3040 | if (!so->so_is_open_owner) |
3041 | continue; | |
a50d2ad1 BF |
3042 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
3043 | oo = openowner(so); | |
d15c077e BF |
3044 | clp = oo->oo_owner.so_client; |
3045 | if ((bool)clp->cl_minorversion != sessions) | |
3046 | return NULL; | |
a50d2ad1 BF |
3047 | renew_client(oo->oo_owner.so_client); |
3048 | return oo; | |
3049 | } | |
1da177e4 LT |
3050 | } |
3051 | return NULL; | |
3052 | } | |
3053 | ||
3054 | /* search file_hashtbl[] for file */ | |
3055 | static struct nfs4_file * | |
ca943217 | 3056 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3057 | { |
ca943217 | 3058 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3059 | struct nfs4_file *fp; |
3060 | ||
950e0118 TM |
3061 | lockdep_assert_held(&state_lock); |
3062 | ||
89876f8c | 3063 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3064 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3065 | get_nfs4_file(fp); |
1da177e4 | 3066 | return fp; |
13cd2184 | 3067 | } |
1da177e4 LT |
3068 | } |
3069 | return NULL; | |
3070 | } | |
3071 | ||
950e0118 | 3072 | static struct nfs4_file * |
ca943217 | 3073 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3074 | { |
3075 | struct nfs4_file *fp; | |
3076 | ||
3077 | spin_lock(&state_lock); | |
ca943217 | 3078 | fp = find_file_locked(fh); |
950e0118 TM |
3079 | spin_unlock(&state_lock); |
3080 | return fp; | |
3081 | } | |
3082 | ||
3083 | static struct nfs4_file * | |
f9c00c3a | 3084 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3085 | { |
3086 | struct nfs4_file *fp; | |
3087 | ||
3088 | spin_lock(&state_lock); | |
ca943217 | 3089 | fp = find_file_locked(fh); |
950e0118 | 3090 | if (fp == NULL) { |
f9c00c3a | 3091 | nfsd4_init_file(new, fh); |
950e0118 TM |
3092 | fp = new; |
3093 | } | |
3094 | spin_unlock(&state_lock); | |
3095 | ||
3096 | return fp; | |
3097 | } | |
3098 | ||
1da177e4 LT |
3099 | /* |
3100 | * Called to check deny when READ with all zero stateid or | |
3101 | * WRITE with all zero or all one stateid | |
3102 | */ | |
b37ad28b | 3103 | static __be32 |
1da177e4 LT |
3104 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3105 | { | |
1da177e4 | 3106 | struct nfs4_file *fp; |
baeb4ff0 | 3107 | __be32 ret = nfs_ok; |
1da177e4 | 3108 | |
ca943217 | 3109 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3110 | if (!fp) |
baeb4ff0 JL |
3111 | return ret; |
3112 | /* Check for conflicting share reservations */ | |
1d31a253 | 3113 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3114 | if (fp->fi_share_deny & deny_type) |
3115 | ret = nfserr_locked; | |
1d31a253 | 3116 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3117 | put_nfs4_file(fp); |
3118 | return ret; | |
1da177e4 LT |
3119 | } |
3120 | ||
02e1215f | 3121 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3122 | { |
11b9164a TM |
3123 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3124 | nfsd_net_id); | |
e8c69d17 | 3125 | |
11b9164a | 3126 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3127 | |
dff1399f | 3128 | /* |
f54fe962 JL |
3129 | * We can't do this in nfsd_break_deleg_cb because it is |
3130 | * already holding inode->i_lock. | |
3131 | * | |
dff1399f JL |
3132 | * If the dl_time != 0, then we know that it has already been |
3133 | * queued for a lease break. Don't queue it again. | |
3134 | */ | |
f54fe962 | 3135 | spin_lock(&state_lock); |
dff1399f | 3136 | if (dp->dl_time == 0) { |
dff1399f | 3137 | dp->dl_time = get_seconds(); |
02e1215f | 3138 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3139 | } |
02e1215f JL |
3140 | spin_unlock(&state_lock); |
3141 | } | |
1da177e4 | 3142 | |
02e1215f JL |
3143 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3144 | { | |
3145 | /* | |
3146 | * We're assuming the state code never drops its reference | |
3147 | * without first removing the lease. Since we're in this lease | |
3148 | * callback (and since the lease code is serialized by the kernel | |
3149 | * lock) we know the server hasn't removed the lease yet, we know | |
3150 | * it's safe to take a reference. | |
3151 | */ | |
72c0b0fb | 3152 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3153 | nfsd4_cb_recall(dp); |
3154 | } | |
3155 | ||
1c8c601a | 3156 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3157 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3158 | { | |
acfdf5c3 BF |
3159 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3160 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3161 | |
7fa10cd1 BF |
3162 | if (!fp) { |
3163 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3164 | return; | |
3165 | } | |
3166 | if (fp->fi_had_conflict) { | |
3167 | WARN(1, "duplicate break on %p\n", fp); | |
3168 | return; | |
3169 | } | |
0272e1fd BF |
3170 | /* |
3171 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3172 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3173 | * in time: |
0272e1fd BF |
3174 | */ |
3175 | fl->fl_break_time = 0; | |
1da177e4 | 3176 | |
02e1215f | 3177 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3178 | fp->fi_had_conflict = true; |
3179 | /* | |
3180 | * If there are no delegations on the list, then we can't count on this | |
3181 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3182 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3183 | * true should keep any new delegations from being hashed. | |
3184 | */ | |
3185 | if (list_empty(&fp->fi_delegations)) | |
3186 | fl->fl_break_time = jiffies; | |
3187 | else | |
3188 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3189 | nfsd_break_one_deleg(dp); | |
02e1215f | 3190 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3191 | } |
3192 | ||
1da177e4 LT |
3193 | static |
3194 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3195 | { | |
3196 | if (arg & F_UNLCK) | |
3197 | return lease_modify(onlist, arg); | |
3198 | else | |
3199 | return -EAGAIN; | |
3200 | } | |
3201 | ||
7b021967 | 3202 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3203 | .lm_break = nfsd_break_deleg_cb, |
3204 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3205 | }; |
3206 | ||
7a8711c9 BF |
3207 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3208 | { | |
3209 | if (nfsd4_has_session(cstate)) | |
3210 | return nfs_ok; | |
3211 | if (seqid == so->so_seqid - 1) | |
3212 | return nfserr_replay_me; | |
3213 | if (seqid == so->so_seqid) | |
3214 | return nfs_ok; | |
3215 | return nfserr_bad_seqid; | |
3216 | } | |
1da177e4 | 3217 | |
4b24ca7d JL |
3218 | static __be32 lookup_clientid(clientid_t *clid, |
3219 | struct nfsd4_compound_state *cstate, | |
3220 | struct nfsd_net *nn) | |
3221 | { | |
3222 | struct nfs4_client *found; | |
3223 | ||
3224 | if (cstate->clp) { | |
3225 | found = cstate->clp; | |
3226 | if (!same_clid(&found->cl_clientid, clid)) | |
3227 | return nfserr_stale_clientid; | |
3228 | return nfs_ok; | |
3229 | } | |
3230 | ||
3231 | if (STALE_CLIENTID(clid, nn)) | |
3232 | return nfserr_stale_clientid; | |
3233 | ||
3234 | /* | |
3235 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3236 | * cached already then we know this is for is for v4.0 and "sessions" | |
3237 | * will be false. | |
3238 | */ | |
3239 | WARN_ON_ONCE(cstate->session); | |
3240 | found = find_confirmed_client(clid, false, nn); | |
3241 | if (!found) | |
3242 | return nfserr_expired; | |
3243 | ||
3244 | /* Cache the nfs4_client in cstate! */ | |
3245 | cstate->clp = found; | |
3246 | atomic_inc(&found->cl_refcount); | |
3247 | return nfs_ok; | |
3248 | } | |
3249 | ||
b37ad28b | 3250 | __be32 |
6668958f | 3251 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3252 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3253 | { |
1da177e4 LT |
3254 | clientid_t *clientid = &open->op_clientid; |
3255 | struct nfs4_client *clp = NULL; | |
3256 | unsigned int strhashval; | |
fe0750e5 | 3257 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3258 | __be32 status; |
1da177e4 | 3259 | |
2c142baa | 3260 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3261 | return nfserr_stale_clientid; |
32513b40 BF |
3262 | /* |
3263 | * In case we need it later, after we've already created the | |
3264 | * file and don't want to risk a further failure: | |
3265 | */ | |
3266 | open->op_file = nfsd4_alloc_file(); | |
3267 | if (open->op_file == NULL) | |
3268 | return nfserr_jukebox; | |
1da177e4 | 3269 | |
2d91e895 TM |
3270 | status = lookup_clientid(clientid, cstate, nn); |
3271 | if (status) | |
3272 | return status; | |
3273 | clp = cstate->clp; | |
3274 | ||
16bfdaaf | 3275 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3276 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3277 | open->op_openowner = oo; |
3278 | if (!oo) { | |
bcf130f9 | 3279 | goto new_owner; |
1da177e4 | 3280 | } |
dad1c067 | 3281 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3282 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3283 | release_openowner(oo); |
3284 | open->op_openowner = NULL; | |
bcf130f9 | 3285 | goto new_owner; |
0f442aa2 | 3286 | } |
4cdc951b BF |
3287 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3288 | if (status) | |
3289 | return status; | |
4cdc951b | 3290 | goto alloc_stateid; |
bcf130f9 | 3291 | new_owner: |
13d6f66b | 3292 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3293 | if (oo == NULL) |
3294 | return nfserr_jukebox; | |
3295 | open->op_openowner = oo; | |
4cdc951b | 3296 | alloc_stateid: |
b49e084d | 3297 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3298 | if (!open->op_stp) |
3299 | return nfserr_jukebox; | |
0f442aa2 | 3300 | return nfs_ok; |
1da177e4 LT |
3301 | } |
3302 | ||
b37ad28b | 3303 | static inline __be32 |
4a6e43e6 N |
3304 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3305 | { | |
3306 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3307 | return nfserr_openmode; | |
3308 | else | |
3309 | return nfs_ok; | |
3310 | } | |
3311 | ||
f459e453 | 3312 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3313 | { |
f459e453 | 3314 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3315 | } |
3316 | ||
38c2f4b1 | 3317 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3318 | { |
f459e453 | 3319 | struct nfs4_stid *ret; |
24a0111e | 3320 | |
38c2f4b1 | 3321 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3322 | if (!ret) |
3323 | return NULL; | |
3324 | return delegstateid(ret); | |
24a0111e BF |
3325 | } |
3326 | ||
8b289b2c BF |
3327 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3328 | { | |
3329 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3330 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3331 | } | |
3332 | ||
b37ad28b | 3333 | static __be32 |
41d22663 | 3334 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3335 | struct nfs4_delegation **dp) |
3336 | { | |
3337 | int flags; | |
b37ad28b | 3338 | __be32 status = nfserr_bad_stateid; |
567d9829 | 3339 | |
38c2f4b1 | 3340 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 3341 | if (*dp == NULL) |
c44c5eeb | 3342 | goto out; |
24a0111e | 3343 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3344 | status = nfs4_check_delegmode(*dp, flags); |
3345 | if (status) | |
3346 | *dp = NULL; | |
c44c5eeb | 3347 | out: |
8b289b2c | 3348 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3349 | return nfs_ok; |
3350 | if (status) | |
3351 | return status; | |
dad1c067 | 3352 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3353 | return nfs_ok; |
567d9829 N |
3354 | } |
3355 | ||
a46cb7f2 JL |
3356 | static struct nfs4_ol_stateid * |
3357 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3358 | { |
a46cb7f2 | 3359 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3360 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3361 | |
1d31a253 | 3362 | spin_lock(&fp->fi_lock); |
8beefa24 | 3363 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3364 | /* ignore lock owners */ |
3365 | if (local->st_stateowner->so_is_open_owner == 0) | |
3366 | continue; | |
baeb4ff0 | 3367 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3368 | ret = local; |
baeb4ff0 | 3369 | break; |
1d31a253 | 3370 | } |
1da177e4 | 3371 | } |
1d31a253 | 3372 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3373 | return ret; |
1da177e4 LT |
3374 | } |
3375 | ||
21fb4016 BF |
3376 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3377 | { | |
3378 | int flags = 0; | |
3379 | ||
3380 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3381 | flags |= NFSD_MAY_READ; | |
3382 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3383 | flags |= NFSD_MAY_WRITE; | |
3384 | return flags; | |
3385 | } | |
3386 | ||
7e6a72e5 CH |
3387 | static inline __be32 |
3388 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3389 | struct nfsd4_open *open) | |
3390 | { | |
3391 | struct iattr iattr = { | |
3392 | .ia_valid = ATTR_SIZE, | |
3393 | .ia_size = 0, | |
3394 | }; | |
3395 | if (!open->op_truncate) | |
3396 | return 0; | |
3397 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3398 | return nfserr_inval; | |
3399 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3400 | } | |
3401 | ||
0c12eaff | 3402 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3403 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3404 | struct nfsd4_open *open) | |
f9d7562f | 3405 | { |
de18643d | 3406 | struct file *filp = NULL; |
f9d7562f | 3407 | __be32 status; |
0c12eaff CB |
3408 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3409 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3410 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3411 | |
de18643d | 3412 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3413 | |
3414 | /* | |
3415 | * Are we trying to set a deny mode that would conflict with | |
3416 | * current access? | |
3417 | */ | |
3418 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3419 | if (status != nfs_ok) { | |
3420 | spin_unlock(&fp->fi_lock); | |
3421 | goto out; | |
3422 | } | |
3423 | ||
3424 | /* set access to the file */ | |
3425 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3426 | if (status != nfs_ok) { | |
3427 | spin_unlock(&fp->fi_lock); | |
3428 | goto out; | |
3429 | } | |
3430 | ||
3431 | /* Set access bits in stateid */ | |
3432 | old_access_bmap = stp->st_access_bmap; | |
3433 | set_access(open->op_share_access, stp); | |
3434 | ||
3435 | /* Set new deny mask */ | |
3436 | old_deny_bmap = stp->st_deny_bmap; | |
3437 | set_deny(open->op_share_deny, stp); | |
3438 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3439 | ||
f9d7562f | 3440 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3441 | spin_unlock(&fp->fi_lock); |
3442 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3443 | if (status) |
baeb4ff0 | 3444 | goto out_put_access; |
de18643d TM |
3445 | spin_lock(&fp->fi_lock); |
3446 | if (!fp->fi_fds[oflag]) { | |
3447 | fp->fi_fds[oflag] = filp; | |
3448 | filp = NULL; | |
3449 | } | |
f9d7562f | 3450 | } |
de18643d TM |
3451 | spin_unlock(&fp->fi_lock); |
3452 | if (filp) | |
3453 | fput(filp); | |
f9d7562f | 3454 | |
7e6a72e5 CH |
3455 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3456 | if (status) | |
3457 | goto out_put_access; | |
7e6a72e5 CH |
3458 | out: |
3459 | return status; | |
baeb4ff0 JL |
3460 | out_put_access: |
3461 | stp->st_access_bmap = old_access_bmap; | |
3462 | nfs4_file_put_access(fp, open->op_share_access); | |
3463 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3464 | goto out; | |
1da177e4 LT |
3465 | } |
3466 | ||
b37ad28b | 3467 | static __be32 |
dcef0413 | 3468 | 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 | 3469 | { |
b37ad28b | 3470 | __be32 status; |
baeb4ff0 | 3471 | unsigned char old_deny_bmap; |
1da177e4 | 3472 | |
6eb3a1d0 | 3473 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3474 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3475 | |
baeb4ff0 JL |
3476 | /* test and set deny mode */ |
3477 | spin_lock(&fp->fi_lock); | |
3478 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3479 | if (status == nfs_ok) { | |
3480 | old_deny_bmap = stp->st_deny_bmap; | |
3481 | set_deny(open->op_share_deny, stp); | |
3482 | fp->fi_share_deny |= | |
3483 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3484 | } | |
3485 | spin_unlock(&fp->fi_lock); | |
3486 | ||
3487 | if (status != nfs_ok) | |
1da177e4 | 3488 | return status; |
1da177e4 | 3489 | |
baeb4ff0 JL |
3490 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3491 | if (status != nfs_ok) | |
3492 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3493 | return status; | |
3494 | } | |
1da177e4 | 3495 | |
1da177e4 | 3496 | static void |
1255a8f3 | 3497 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3498 | { |
dad1c067 | 3499 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3500 | } |
3501 | ||
14a24e99 BF |
3502 | /* Should we give out recallable state?: */ |
3503 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3504 | { | |
3505 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3506 | return true; | |
3507 | /* | |
3508 | * In the sessions case, since we don't have to establish a | |
3509 | * separate connection for callbacks, we assume it's OK | |
3510 | * until we hear otherwise: | |
3511 | */ | |
3512 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3513 | } | |
3514 | ||
d564fbec | 3515 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3516 | { |
3517 | struct file_lock *fl; | |
3518 | ||
3519 | fl = locks_alloc_lock(); | |
3520 | if (!fl) | |
3521 | return NULL; | |
3522 | locks_init_lock(fl); | |
3523 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3524 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3525 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3526 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3527 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3528 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3529 | return fl; |
3530 | } | |
3531 | ||
99c41515 | 3532 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3533 | { |
11b9164a | 3534 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3535 | struct file_lock *fl; |
417c6629 JL |
3536 | struct file *filp; |
3537 | int status = 0; | |
edab9782 | 3538 | |
d564fbec | 3539 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3540 | if (!fl) |
3541 | return -ENOMEM; | |
417c6629 JL |
3542 | filp = find_readable_file(fp); |
3543 | if (!filp) { | |
3544 | /* We should always have a readable file here */ | |
3545 | WARN_ON_ONCE(1); | |
3546 | return -EBADF; | |
3547 | } | |
3548 | fl->fl_file = filp; | |
3549 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3550 | if (status) { | |
3551 | locks_free_lock(fl); | |
3552 | goto out_fput; | |
3553 | } | |
3554 | spin_lock(&state_lock); | |
3555 | spin_lock(&fp->fi_lock); | |
3556 | /* Did the lease get broken before we took the lock? */ | |
3557 | status = -EAGAIN; | |
3558 | if (fp->fi_had_conflict) | |
3559 | goto out_unlock; | |
3560 | /* Race breaker */ | |
3561 | if (fp->fi_lease) { | |
3562 | status = 0; | |
3563 | atomic_inc(&fp->fi_delegees); | |
3564 | hash_delegation_locked(dp, fp); | |
3565 | goto out_unlock; | |
3566 | } | |
acfdf5c3 | 3567 | fp->fi_lease = fl; |
417c6629 | 3568 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3569 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3570 | hash_delegation_locked(dp, fp); |
417c6629 | 3571 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3572 | spin_unlock(&state_lock); |
acfdf5c3 | 3573 | return 0; |
417c6629 JL |
3574 | out_unlock: |
3575 | spin_unlock(&fp->fi_lock); | |
3576 | spin_unlock(&state_lock); | |
3577 | out_fput: | |
3578 | fput(filp); | |
e873088f | 3579 | return status; |
acfdf5c3 BF |
3580 | } |
3581 | ||
0b26693c JL |
3582 | static struct nfs4_delegation * |
3583 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3584 | struct nfs4_file *fp) | |
acfdf5c3 | 3585 | { |
0b26693c JL |
3586 | int status; |
3587 | struct nfs4_delegation *dp; | |
417c6629 | 3588 | |
bf7bd3e9 | 3589 | if (fp->fi_had_conflict) |
0b26693c JL |
3590 | return ERR_PTR(-EAGAIN); |
3591 | ||
3592 | dp = alloc_init_deleg(clp, fh); | |
3593 | if (!dp) | |
3594 | return ERR_PTR(-ENOMEM); | |
3595 | ||
bf7bd3e9 | 3596 | get_nfs4_file(fp); |
417c6629 JL |
3597 | spin_lock(&state_lock); |
3598 | spin_lock(&fp->fi_lock); | |
11b9164a | 3599 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3600 | if (!fp->fi_lease) { |
3601 | spin_unlock(&fp->fi_lock); | |
3602 | spin_unlock(&state_lock); | |
0b26693c JL |
3603 | status = nfs4_setlease(dp); |
3604 | goto out; | |
417c6629 | 3605 | } |
cbf7a75b | 3606 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3607 | if (fp->fi_had_conflict) { |
417c6629 JL |
3608 | status = -EAGAIN; |
3609 | goto out_unlock; | |
acfdf5c3 | 3610 | } |
931ee56c | 3611 | hash_delegation_locked(dp, fp); |
0b26693c | 3612 | status = 0; |
417c6629 JL |
3613 | out_unlock: |
3614 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3615 | spin_unlock(&state_lock); |
0b26693c JL |
3616 | out: |
3617 | if (status) { | |
6011695d | 3618 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3619 | return ERR_PTR(status); |
3620 | } | |
3621 | return dp; | |
edab9782 BF |
3622 | } |
3623 | ||
4aa8913c BH |
3624 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3625 | { | |
3626 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3627 | if (status == -EAGAIN) | |
3628 | open->op_why_no_deleg = WND4_CONTENTION; | |
3629 | else { | |
3630 | open->op_why_no_deleg = WND4_RESOURCE; | |
3631 | switch (open->op_deleg_want) { | |
3632 | case NFS4_SHARE_WANT_READ_DELEG: | |
3633 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3634 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3635 | break; | |
3636 | case NFS4_SHARE_WANT_CANCEL: | |
3637 | open->op_why_no_deleg = WND4_CANCELLED; | |
3638 | break; | |
3639 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3640 | WARN_ON_ONCE(1); |
4aa8913c BH |
3641 | } |
3642 | } | |
3643 | } | |
3644 | ||
1da177e4 LT |
3645 | /* |
3646 | * Attempt to hand out a delegation. | |
99c41515 BF |
3647 | * |
3648 | * Note we don't support write delegations, and won't until the vfs has | |
3649 | * proper support for them. | |
1da177e4 LT |
3650 | */ |
3651 | static void | |
4cf59221 JL |
3652 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3653 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3654 | { |
3655 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3656 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3657 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3658 | int cb_up; |
99c41515 | 3659 | int status = 0; |
1da177e4 | 3660 | |
fe0750e5 | 3661 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3662 | open->op_recall = 0; |
3663 | switch (open->op_claim_type) { | |
3664 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3665 | if (!cb_up) |
7b190fec | 3666 | open->op_recall = 1; |
99c41515 BF |
3667 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3668 | goto out_no_deleg; | |
7b190fec N |
3669 | break; |
3670 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3671 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3672 | /* |
3673 | * Let's not give out any delegations till everyone's | |
3674 | * had the chance to reclaim theirs.... | |
3675 | */ | |
4cf59221 | 3676 | if (locks_in_grace(clp->net)) |
99c41515 | 3677 | goto out_no_deleg; |
dad1c067 | 3678 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3679 | goto out_no_deleg; |
9a0590ae SD |
3680 | /* |
3681 | * Also, if the file was opened for write or | |
3682 | * create, there's a good chance the client's | |
3683 | * about to write to it, resulting in an | |
3684 | * immediate recall (since we don't support | |
3685 | * write delegations): | |
3686 | */ | |
7b190fec | 3687 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3688 | goto out_no_deleg; |
3689 | if (open->op_create == NFS4_OPEN_CREATE) | |
3690 | goto out_no_deleg; | |
7b190fec N |
3691 | break; |
3692 | default: | |
99c41515 | 3693 | goto out_no_deleg; |
7b190fec | 3694 | } |
11b9164a | 3695 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3696 | if (IS_ERR(dp)) |
dd239cc0 | 3697 | goto out_no_deleg; |
1da177e4 | 3698 | |
d5477a8d | 3699 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3700 | |
8c10cbdb | 3701 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3702 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3703 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 | 3704 | return; |
dd239cc0 | 3705 | out_no_deleg: |
99c41515 BF |
3706 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3707 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3708 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3709 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3710 | open->op_recall = 1; |
3711 | } | |
99c41515 BF |
3712 | |
3713 | /* 4.1 client asking for a delegation? */ | |
3714 | if (open->op_deleg_want) | |
3715 | nfsd4_open_deleg_none_ext(open, status); | |
3716 | return; | |
1da177e4 LT |
3717 | } |
3718 | ||
e27f49c3 BH |
3719 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3720 | struct nfs4_delegation *dp) | |
3721 | { | |
3722 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3723 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3724 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3725 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3726 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3727 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3728 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3729 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3730 | } | |
3731 | /* Otherwise the client must be confused wanting a delegation | |
3732 | * it already has, therefore we don't return | |
3733 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3734 | */ | |
3735 | } | |
3736 | ||
1da177e4 LT |
3737 | /* |
3738 | * called with nfs4_lock_state() held. | |
3739 | */ | |
b37ad28b | 3740 | __be32 |
1da177e4 LT |
3741 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3742 | { | |
6668958f | 3743 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3744 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3745 | struct nfs4_file *fp = NULL; |
dcef0413 | 3746 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3747 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3748 | __be32 status; |
1da177e4 | 3749 | |
1da177e4 LT |
3750 | /* |
3751 | * Lookup file; if found, lookup stateid and check open request, | |
3752 | * and check for delegations in the process of being recalled. | |
3753 | * If not found, create the nfs4_file struct | |
3754 | */ | |
f9c00c3a | 3755 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3756 | if (fp != open->op_file) { |
41d22663 | 3757 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3758 | if (status) |
3759 | goto out; | |
a46cb7f2 | 3760 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3761 | } else { |
950e0118 | 3762 | open->op_file = NULL; |
c44c5eeb | 3763 | status = nfserr_bad_stateid; |
8b289b2c | 3764 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3765 | goto out; |
3e772463 | 3766 | status = nfserr_jukebox; |
1da177e4 LT |
3767 | } |
3768 | ||
3769 | /* | |
3770 | * OPEN the file, or upgrade an existing OPEN. | |
3771 | * If truncate fails, the OPEN fails. | |
3772 | */ | |
3773 | if (stp) { | |
3774 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3775 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3776 | if (status) |
3777 | goto out; | |
3778 | } else { | |
4cdc951b BF |
3779 | stp = open->op_stp; |
3780 | open->op_stp = NULL; | |
996e0938 | 3781 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3782 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3783 | if (status) { | |
3784 | release_open_stateid(stp); | |
3785 | goto out; | |
3786 | } | |
1da177e4 | 3787 | } |
dcef0413 BF |
3788 | update_stateid(&stp->st_stid.sc_stateid); |
3789 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3790 | |
d24433cd | 3791 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3792 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3793 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3794 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3795 | goto nodeleg; | |
3796 | } | |
3797 | } | |
3798 | ||
1da177e4 LT |
3799 | /* |
3800 | * Attempt to hand out a delegation. No error return, because the | |
3801 | * OPEN succeeds even if we fail. | |
3802 | */ | |
4cf59221 | 3803 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3804 | nodeleg: |
1da177e4 LT |
3805 | status = nfs_ok; |
3806 | ||
8c10cbdb | 3807 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3808 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3809 | out: |
d24433cd BH |
3810 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3811 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3812 | open->op_deleg_want) |
3813 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3814 | |
13cd2184 N |
3815 | if (fp) |
3816 | put_nfs4_file(fp); | |
37515177 | 3817 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3818 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3819 | /* |
3820 | * To finish the open response, we just need to set the rflags. | |
3821 | */ | |
3822 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3823 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3824 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3825 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3826 | ||
3827 | return status; | |
3828 | } | |
3829 | ||
d29b20cd BF |
3830 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3831 | { | |
3832 | if (open->op_openowner) { | |
3833 | struct nfs4_openowner *oo = open->op_openowner; | |
3834 | ||
3835 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3836 | list_del_init(&oo->oo_close_lru); | |
3837 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3838 | if (status) { | |
3839 | release_openowner(oo); | |
3840 | open->op_openowner = NULL; | |
3841 | } else | |
3842 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3843 | } | |
3844 | } | |
32513b40 BF |
3845 | if (open->op_file) |
3846 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3847 | if (open->op_stp) |
6011695d | 3848 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
3849 | } |
3850 | ||
b37ad28b | 3851 | __be32 |
b591480b BF |
3852 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3853 | clientid_t *clid) | |
1da177e4 LT |
3854 | { |
3855 | struct nfs4_client *clp; | |
b37ad28b | 3856 | __be32 status; |
7f2210fa | 3857 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3858 | |
3859 | nfs4_lock_state(); | |
3860 | dprintk("process_renew(%08x/%08x): starting\n", | |
3861 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3862 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3863 | if (status) |
1da177e4 | 3864 | goto out; |
4b24ca7d | 3865 | clp = cstate->clp; |
1da177e4 | 3866 | status = nfserr_cb_path_down; |
ea1da636 | 3867 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3868 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3869 | goto out; |
3870 | status = nfs_ok; | |
3871 | out: | |
3872 | nfs4_unlock_state(); | |
3873 | return status; | |
3874 | } | |
3875 | ||
a76b4319 | 3876 | static void |
12760c66 | 3877 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3878 | { |
33dcc481 | 3879 | /* do nothing if grace period already ended */ |
a51c84ed | 3880 | if (nn->grace_ended) |
33dcc481 JL |
3881 | return; |
3882 | ||
a76b4319 | 3883 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3884 | nn->grace_ended = true; |
12760c66 | 3885 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3886 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3887 | /* |
3888 | * Now that every NFSv4 client has had the chance to recover and | |
3889 | * to see the (possibly new, possibly shorter) lease time, we | |
3890 | * can safely set the next grace time to the current lease time: | |
3891 | */ | |
5284b44e | 3892 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3893 | } |
3894 | ||
fd39ca9a | 3895 | static time_t |
09121281 | 3896 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3897 | { |
3898 | struct nfs4_client *clp; | |
fe0750e5 | 3899 | struct nfs4_openowner *oo; |
1da177e4 LT |
3900 | struct nfs4_delegation *dp; |
3901 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3902 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3903 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3904 | |
3905 | nfs4_lock_state(); | |
3906 | ||
3907 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3908 | nfsd4_end_grace(nn); |
36acb66b | 3909 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3910 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3911 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3912 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3913 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3914 | t = clp->cl_time - cutoff; | |
a832e7ae | 3915 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3916 | break; |
3917 | } | |
221a6876 | 3918 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3919 | dprintk("NFSD: client in use (clientid %08x)\n", |
3920 | clp->cl_clientid.cl_id); | |
3921 | continue; | |
3922 | } | |
221a6876 | 3923 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3924 | } |
c9a49628 | 3925 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3926 | list_for_each_safe(pos, next, &reaplist) { |
3927 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3928 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3929 | clp->cl_clientid.cl_id); | |
3930 | expire_client(clp); | |
3931 | } | |
cdc97505 | 3932 | spin_lock(&state_lock); |
e8c69d17 | 3933 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3934 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3935 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3936 | continue; | |
1da177e4 | 3937 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3938 | t = dp->dl_time - cutoff; |
3939 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3940 | break; |
3941 | } | |
42690676 JL |
3942 | unhash_delegation_locked(dp); |
3943 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 3944 | } |
cdc97505 | 3945 | spin_unlock(&state_lock); |
2d4a532d JL |
3946 | while (!list_empty(&reaplist)) { |
3947 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
3948 | dl_recall_lru); | |
3949 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 3950 | revoke_delegation(dp); |
1da177e4 | 3951 | } |
73758fed | 3952 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3953 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3954 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3955 | t = oo->oo_time - cutoff; |
3956 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3957 | break; |
3958 | } | |
fe0750e5 | 3959 | release_openowner(oo); |
1da177e4 | 3960 | } |
a832e7ae | 3961 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3962 | nfs4_unlock_state(); |
a832e7ae | 3963 | return new_timeo; |
1da177e4 LT |
3964 | } |
3965 | ||
a254b246 HH |
3966 | static struct workqueue_struct *laundry_wq; |
3967 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3968 | |
3969 | static void | |
09121281 | 3970 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3971 | { |
3972 | time_t t; | |
09121281 SK |
3973 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3974 | work); | |
3975 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3976 | laundromat_work); | |
1da177e4 | 3977 | |
09121281 | 3978 | t = nfs4_laundromat(nn); |
1da177e4 | 3979 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3980 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3981 | } |
3982 | ||
f7a4d872 | 3983 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3984 | { |
11b9164a | 3985 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
3986 | return nfserr_bad_stateid; |
3987 | return nfs_ok; | |
1da177e4 LT |
3988 | } |
3989 | ||
1da177e4 | 3990 | static inline int |
82c5ff1b | 3991 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3992 | { |
82c5ff1b JL |
3993 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3994 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3995 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3996 | } |
3997 | ||
3998 | static inline int | |
82c5ff1b | 3999 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4000 | { |
82c5ff1b JL |
4001 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4002 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4003 | } |
4004 | ||
4005 | static | |
dcef0413 | 4006 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4007 | { |
b37ad28b | 4008 | __be32 status = nfserr_openmode; |
1da177e4 | 4009 | |
02921914 BF |
4010 | /* For lock stateid's, we test the parent open, not the lock: */ |
4011 | if (stp->st_openstp) | |
4012 | stp = stp->st_openstp; | |
82c5ff1b | 4013 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4014 | goto out; |
82c5ff1b | 4015 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4016 | goto out; |
4017 | status = nfs_ok; | |
4018 | out: | |
4019 | return status; | |
4020 | } | |
4021 | ||
b37ad28b | 4022 | static inline __be32 |
5ccb0066 | 4023 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4024 | { |
203a8c8e | 4025 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4026 | return nfs_ok; |
5ccb0066 | 4027 | else if (locks_in_grace(net)) { |
25985edc | 4028 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4029 | * conflicting state; so we must wait out the grace period. */ |
4030 | return nfserr_grace; | |
4031 | } else if (flags & WR_STATE) | |
4032 | return nfs4_share_conflict(current_fh, | |
4033 | NFS4_SHARE_DENY_WRITE); | |
4034 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4035 | return nfs4_share_conflict(current_fh, | |
4036 | NFS4_SHARE_DENY_READ); | |
4037 | } | |
4038 | ||
4039 | /* | |
4040 | * Allow READ/WRITE during grace period on recovered state only for files | |
4041 | * that are not able to provide mandatory locking. | |
4042 | */ | |
4043 | static inline int | |
5ccb0066 | 4044 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4045 | { |
5ccb0066 | 4046 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4047 | } |
4048 | ||
81b82965 BF |
4049 | /* Returns true iff a is later than b: */ |
4050 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4051 | { | |
1a9357f4 | 4052 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4053 | } |
4054 | ||
57b7b43b | 4055 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4056 | { |
6668958f AA |
4057 | /* |
4058 | * When sessions are used the stateid generation number is ignored | |
4059 | * when it is zero. | |
4060 | */ | |
28dde241 | 4061 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4062 | return nfs_ok; |
4063 | ||
4064 | if (in->si_generation == ref->si_generation) | |
4065 | return nfs_ok; | |
6668958f | 4066 | |
0836f587 | 4067 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4068 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4069 | return nfserr_bad_stateid; |
4070 | /* | |
81b82965 BF |
4071 | * However, we could see a stateid from the past, even from a |
4072 | * non-buggy client. For example, if the client sends a lock | |
4073 | * while some IO is outstanding, the lock may bump si_generation | |
4074 | * while the IO is still in flight. The client could avoid that | |
4075 | * situation by waiting for responses on all the IO requests, | |
4076 | * but better performance may result in retrying IO that | |
4077 | * receives an old_stateid error if requests are rarely | |
4078 | * reordered in flight: | |
0836f587 | 4079 | */ |
81b82965 | 4080 | return nfserr_old_stateid; |
0836f587 BF |
4081 | } |
4082 | ||
7df302f7 | 4083 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4084 | { |
97b7e3b6 BF |
4085 | struct nfs4_stid *s; |
4086 | struct nfs4_ol_stateid *ols; | |
4087 | __be32 status; | |
17456804 | 4088 | |
7df302f7 CL |
4089 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
4090 | return nfserr_bad_stateid; | |
4091 | /* Client debugging aid. */ | |
4092 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4093 | char addr_str[INET6_ADDRSTRLEN]; | |
4094 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4095 | sizeof(addr_str)); | |
4096 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4097 | "with incorrect client ID\n", addr_str); | |
4098 | return nfserr_bad_stateid; | |
4099 | } | |
38c2f4b1 | 4100 | s = find_stateid(cl, stateid); |
97b7e3b6 | 4101 | if (!s) |
7df302f7 | 4102 | return nfserr_bad_stateid; |
36279ac1 | 4103 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4104 | if (status) |
97b7e3b6 | 4105 | return status; |
23340032 BF |
4106 | switch (s->sc_type) { |
4107 | case NFS4_DELEG_STID: | |
97b7e3b6 | 4108 | return nfs_ok; |
3bd64a5b BF |
4109 | case NFS4_REVOKED_DELEG_STID: |
4110 | return nfserr_deleg_revoked; | |
23340032 BF |
4111 | case NFS4_OPEN_STID: |
4112 | case NFS4_LOCK_STID: | |
4113 | ols = openlockstateid(s); | |
4114 | if (ols->st_stateowner->so_is_open_owner | |
4115 | && !(openowner(ols->st_stateowner)->oo_flags | |
4116 | & NFS4_OO_CONFIRMED)) | |
4117 | return nfserr_bad_stateid; | |
97b7e3b6 | 4118 | return nfs_ok; |
23340032 BF |
4119 | default: |
4120 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4121 | /* Fallthrough */ |
23340032 | 4122 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4123 | case NFS4_CLOSED_DELEG_STID: |
97b7e3b6 | 4124 | return nfserr_bad_stateid; |
23340032 | 4125 | } |
17456804 BS |
4126 | } |
4127 | ||
2dd6e458 TM |
4128 | static __be32 |
4129 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4130 | stateid_t *stateid, unsigned char typemask, | |
4131 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4132 | { |
0eb6f20a | 4133 | __be32 status; |
38c2f4b1 BF |
4134 | |
4135 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4136 | return nfserr_bad_stateid; | |
4b24ca7d | 4137 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4138 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4139 | if (cstate->session) |
a8a7c677 | 4140 | return nfserr_bad_stateid; |
38c2f4b1 | 4141 | return nfserr_stale_stateid; |
a8a7c677 | 4142 | } |
0eb6f20a BF |
4143 | if (status) |
4144 | return status; | |
4b24ca7d | 4145 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4146 | if (!*s) |
4147 | return nfserr_bad_stateid; | |
4148 | return nfs_ok; | |
38c2f4b1 BF |
4149 | } |
4150 | ||
1da177e4 LT |
4151 | /* |
4152 | * Checks for stateid operations | |
4153 | */ | |
b37ad28b | 4154 | __be32 |
5ccb0066 | 4155 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4156 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4157 | { |
69064a27 | 4158 | struct nfs4_stid *s; |
dcef0413 | 4159 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4160 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4161 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4162 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4163 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4164 | struct file *file = NULL; |
b37ad28b | 4165 | __be32 status; |
1da177e4 | 4166 | |
1da177e4 LT |
4167 | if (filpp) |
4168 | *filpp = NULL; | |
4169 | ||
5ccb0066 | 4170 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4171 | return nfserr_grace; |
4172 | ||
4173 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4174 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4175 | |
14bcab1a TM |
4176 | nfs4_lock_state(); |
4177 | ||
2dd6e458 | 4178 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4179 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4180 | &s, nn); |
38c2f4b1 | 4181 | if (status) |
14bcab1a | 4182 | goto out; |
69064a27 BF |
4183 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4184 | if (status) | |
4185 | goto out; | |
f7a4d872 BF |
4186 | switch (s->sc_type) { |
4187 | case NFS4_DELEG_STID: | |
69064a27 | 4188 | dp = delegstateid(s); |
dc9bf700 BF |
4189 | status = nfs4_check_delegmode(dp, flags); |
4190 | if (status) | |
4191 | goto out; | |
43b0178e | 4192 | if (filpp) { |
11b9164a | 4193 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4194 | if (!file) { |
063b0fb9 BF |
4195 | WARN_ON_ONCE(1); |
4196 | status = nfserr_serverfault; | |
4197 | goto out; | |
4198 | } | |
de18643d | 4199 | get_file(file); |
43b0178e | 4200 | } |
f7a4d872 BF |
4201 | break; |
4202 | case NFS4_OPEN_STID: | |
4203 | case NFS4_LOCK_STID: | |
69064a27 | 4204 | stp = openlockstateid(s); |
f7a4d872 BF |
4205 | status = nfs4_check_fh(current_fh, stp); |
4206 | if (status) | |
1da177e4 | 4207 | goto out; |
fe0750e5 | 4208 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4209 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4210 | goto out; |
a4455be0 BF |
4211 | status = nfs4_check_openmode(stp, flags); |
4212 | if (status) | |
1da177e4 | 4213 | goto out; |
f9d7562f | 4214 | if (filpp) { |
11b9164a TM |
4215 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4216 | ||
f9d7562f | 4217 | if (flags & RD_STATE) |
11b9164a | 4218 | file = find_readable_file(fp); |
f9d7562f | 4219 | else |
11b9164a | 4220 | file = find_writeable_file(fp); |
f9d7562f | 4221 | } |
f7a4d872 BF |
4222 | break; |
4223 | default: | |
14bcab1a TM |
4224 | status = nfserr_bad_stateid; |
4225 | goto out; | |
1da177e4 LT |
4226 | } |
4227 | status = nfs_ok; | |
14bcab1a | 4228 | if (file) |
de18643d | 4229 | *filpp = file; |
1da177e4 | 4230 | out: |
14bcab1a | 4231 | nfs4_unlock_state(); |
1da177e4 LT |
4232 | return status; |
4233 | } | |
4234 | ||
e1ca12df | 4235 | static __be32 |
dcef0413 | 4236 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4237 | { |
a1b8ff4c BF |
4238 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4239 | ||
11b9164a | 4240 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
e1ca12df | 4241 | return nfserr_locks_held; |
c53530da | 4242 | release_lockowner_if_empty(lo); |
e1ca12df BS |
4243 | return nfs_ok; |
4244 | } | |
4245 | ||
17456804 BS |
4246 | /* |
4247 | * Test if the stateid is valid | |
4248 | */ | |
4249 | __be32 | |
4250 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4251 | struct nfsd4_test_stateid *test_stateid) | |
4252 | { | |
03cfb420 BS |
4253 | struct nfsd4_test_stateid_id *stateid; |
4254 | struct nfs4_client *cl = cstate->session->se_client; | |
4255 | ||
4256 | nfs4_lock_state(); | |
4257 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4258 | stateid->ts_id_status = |
4259 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4260 | nfs4_unlock_state(); |
4261 | ||
17456804 BS |
4262 | return nfs_ok; |
4263 | } | |
4264 | ||
e1ca12df BS |
4265 | __be32 |
4266 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4267 | struct nfsd4_free_stateid *free_stateid) | |
4268 | { | |
4269 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4270 | struct nfs4_stid *s; |
3bd64a5b | 4271 | struct nfs4_delegation *dp; |
38c2f4b1 | 4272 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4273 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4274 | |
4275 | nfs4_lock_state(); | |
38c2f4b1 | 4276 | s = find_stateid(cl, stateid); |
2da1cec7 | 4277 | if (!s) |
81b82965 | 4278 | goto out; |
2da1cec7 BF |
4279 | switch (s->sc_type) { |
4280 | case NFS4_DELEG_STID: | |
e1ca12df BS |
4281 | ret = nfserr_locks_held; |
4282 | goto out; | |
2da1cec7 BF |
4283 | case NFS4_OPEN_STID: |
4284 | case NFS4_LOCK_STID: | |
4285 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4286 | if (ret) | |
4287 | goto out; | |
4288 | if (s->sc_type == NFS4_LOCK_STID) | |
4289 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4290 | else | |
4291 | ret = nfserr_locks_held; | |
f7a4d872 | 4292 | break; |
3bd64a5b BF |
4293 | case NFS4_REVOKED_DELEG_STID: |
4294 | dp = delegstateid(s); | |
2d4a532d JL |
4295 | spin_lock(&cl->cl_lock); |
4296 | list_del_init(&dp->dl_recall_lru); | |
4297 | spin_unlock(&cl->cl_lock); | |
6011695d | 4298 | nfs4_put_stid(s); |
3bd64a5b BF |
4299 | ret = nfs_ok; |
4300 | break; | |
f7a4d872 BF |
4301 | default: |
4302 | ret = nfserr_bad_stateid; | |
e1ca12df | 4303 | } |
e1ca12df BS |
4304 | out: |
4305 | nfs4_unlock_state(); | |
4306 | return ret; | |
4307 | } | |
4308 | ||
4c4cd222 N |
4309 | static inline int |
4310 | setlkflg (int type) | |
4311 | { | |
4312 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4313 | RD_STATE : WR_STATE; | |
4314 | } | |
1da177e4 | 4315 | |
dcef0413 | 4316 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4317 | { |
4318 | struct svc_fh *current_fh = &cstate->current_fh; | |
4319 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4320 | __be32 status; | |
4321 | ||
c0a5d93e BF |
4322 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4323 | if (status) | |
4324 | return status; | |
3bd64a5b BF |
4325 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4326 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4327 | /* |
4328 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4329 | * nfserr_replay_me from the previous step, and |
4330 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4331 | */ |
4332 | return nfserr_bad_stateid; | |
4333 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4334 | if (status) | |
4335 | return status; | |
4336 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4337 | } |
4338 | ||
1da177e4 LT |
4339 | /* |
4340 | * Checks for sequence id mutating operations. | |
4341 | */ | |
b37ad28b | 4342 | static __be32 |
dd453dfd | 4343 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4344 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4345 | struct nfs4_ol_stateid **stpp, |
4346 | struct nfsd_net *nn) | |
1da177e4 | 4347 | { |
0836f587 | 4348 | __be32 status; |
38c2f4b1 | 4349 | struct nfs4_stid *s; |
e17f99b7 | 4350 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4351 | |
8c10cbdb BH |
4352 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4353 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4354 | |
1da177e4 | 4355 | *stpp = NULL; |
2dd6e458 | 4356 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4357 | if (status) |
4358 | return status; | |
e17f99b7 | 4359 | stp = openlockstateid(s); |
3d74e6a5 | 4360 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4361 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4362 | |
e17f99b7 TM |
4363 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4364 | if (!status) | |
4365 | *stpp = stp; | |
4366 | return status; | |
c0a5d93e | 4367 | } |
39325bd0 | 4368 | |
3320fef1 SK |
4369 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4370 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4371 | { |
4372 | __be32 status; | |
4373 | struct nfs4_openowner *oo; | |
1da177e4 | 4374 | |
c0a5d93e | 4375 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4376 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4377 | if (status) |
4378 | return status; | |
c0a5d93e | 4379 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4380 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4381 | return nfserr_bad_stateid; |
3a4f98bb | 4382 | return nfs_ok; |
1da177e4 LT |
4383 | } |
4384 | ||
b37ad28b | 4385 | __be32 |
ca364317 | 4386 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4387 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4388 | { |
b37ad28b | 4389 | __be32 status; |
fe0750e5 | 4390 | struct nfs4_openowner *oo; |
dcef0413 | 4391 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4392 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4393 | |
a6a9f18f AV |
4394 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4395 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4396 | |
ca364317 | 4397 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4398 | if (status) |
4399 | return status; | |
1da177e4 LT |
4400 | |
4401 | nfs4_lock_state(); | |
4402 | ||
9072d5c6 | 4403 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4404 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4405 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4406 | if (status) |
68b66e82 | 4407 | goto out; |
fe0750e5 | 4408 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4409 | status = nfserr_bad_stateid; |
dad1c067 | 4410 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4411 | goto out; |
dad1c067 | 4412 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4413 | update_stateid(&stp->st_stid.sc_stateid); |
4414 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4415 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4416 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4417 | |
2a4317c5 | 4418 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4419 | status = nfs_ok; |
1da177e4 | 4420 | out: |
9411b1d4 | 4421 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4422 | if (!cstate->replay_owner) |
4423 | nfs4_unlock_state(); | |
1da177e4 LT |
4424 | return status; |
4425 | } | |
4426 | ||
6409a5a6 | 4427 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4428 | { |
82c5ff1b | 4429 | if (!test_access(access, stp)) |
6409a5a6 | 4430 | return; |
11b9164a | 4431 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4432 | clear_access(access, stp); |
6409a5a6 | 4433 | } |
f197c271 | 4434 | |
6409a5a6 BF |
4435 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4436 | { | |
4437 | switch (to_access) { | |
4438 | case NFS4_SHARE_ACCESS_READ: | |
4439 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4440 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4441 | break; | |
4442 | case NFS4_SHARE_ACCESS_WRITE: | |
4443 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4444 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4445 | break; | |
4446 | case NFS4_SHARE_ACCESS_BOTH: | |
4447 | break; | |
4448 | default: | |
063b0fb9 | 4449 | WARN_ON_ONCE(1); |
1da177e4 LT |
4450 | } |
4451 | } | |
4452 | ||
b37ad28b | 4453 | __be32 |
ca364317 BF |
4454 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4455 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4456 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4457 | { |
b37ad28b | 4458 | __be32 status; |
dcef0413 | 4459 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4460 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4461 | |
a6a9f18f AV |
4462 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4463 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4464 | |
c30e92df | 4465 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4466 | if (od->od_deleg_want) |
4467 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4468 | od->od_deleg_want); | |
1da177e4 LT |
4469 | |
4470 | nfs4_lock_state(); | |
c0a5d93e | 4471 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4472 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4473 | if (status) |
1da177e4 | 4474 | goto out; |
1da177e4 | 4475 | status = nfserr_inval; |
82c5ff1b | 4476 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4477 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 LT |
4478 | stp->st_access_bmap, od->od_share_access); |
4479 | goto out; | |
4480 | } | |
ce0fc43c | 4481 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4482 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 LT |
4483 | stp->st_deny_bmap, od->od_share_deny); |
4484 | goto out; | |
4485 | } | |
6409a5a6 | 4486 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4487 | |
ce0fc43c | 4488 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4489 | |
dcef0413 BF |
4490 | update_stateid(&stp->st_stid.sc_stateid); |
4491 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4492 | status = nfs_ok; |
4493 | out: | |
9411b1d4 | 4494 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4495 | if (!cstate->replay_owner) |
4496 | nfs4_unlock_state(); | |
1da177e4 LT |
4497 | return status; |
4498 | } | |
4499 | ||
f7a4d872 BF |
4500 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4501 | { | |
acf9295b TM |
4502 | struct nfs4_client *clp = s->st_stid.sc_client; |
4503 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4504 | ||
f7a4d872 | 4505 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4506 | unhash_open_stateid(s); |
4507 | ||
4508 | if (clp->cl_minorversion) { | |
acf9295b TM |
4509 | if (list_empty(&oo->oo_owner.so_stateids)) |
4510 | release_openowner(oo); | |
6011695d | 4511 | nfs4_put_stid(&s->st_stid); |
acf9295b | 4512 | } else { |
6011695d TM |
4513 | /* |
4514 | * In the 4.0 case we need to keep the owners around a | |
4515 | * little while to handle CLOSE replay. We still do need | |
4516 | * to release any file access that is held by them | |
4517 | * before returning however. | |
4518 | */ | |
4519 | release_all_access(s); | |
11b9164a TM |
4520 | if (s->st_stid.sc_file) { |
4521 | put_nfs4_file(s->st_stid.sc_file); | |
4522 | s->st_stid.sc_file = NULL; | |
f8338834 | 4523 | } |
acf9295b | 4524 | oo->oo_last_closed_stid = s; |
acf9295b TM |
4525 | if (list_empty(&oo->oo_owner.so_stateids)) |
4526 | move_to_close_lru(oo, clp->net); | |
4527 | } | |
38c387b5 BF |
4528 | } |
4529 | ||
1da177e4 LT |
4530 | /* |
4531 | * nfs4_unlock_state() called after encode | |
4532 | */ | |
b37ad28b | 4533 | __be32 |
ca364317 | 4534 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4535 | struct nfsd4_close *close) |
1da177e4 | 4536 | { |
b37ad28b | 4537 | __be32 status; |
dcef0413 | 4538 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4539 | struct net *net = SVC_NET(rqstp); |
4540 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4541 | |
a6a9f18f AV |
4542 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4543 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4544 | |
4545 | nfs4_lock_state(); | |
f7a4d872 BF |
4546 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4547 | &close->cl_stateid, | |
4548 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4549 | &stp, nn); |
9411b1d4 | 4550 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4551 | if (status) |
1da177e4 | 4552 | goto out; |
dcef0413 BF |
4553 | update_stateid(&stp->st_stid.sc_stateid); |
4554 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4555 | |
f7a4d872 | 4556 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4557 | out: |
5ec094c1 BF |
4558 | if (!cstate->replay_owner) |
4559 | nfs4_unlock_state(); | |
1da177e4 LT |
4560 | return status; |
4561 | } | |
4562 | ||
b37ad28b | 4563 | __be32 |
ca364317 BF |
4564 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4565 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4566 | { |
203a8c8e BF |
4567 | struct nfs4_delegation *dp; |
4568 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4569 | struct nfs4_stid *s; |
b37ad28b | 4570 | __be32 status; |
3320fef1 | 4571 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4572 | |
ca364317 | 4573 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4574 | return status; |
1da177e4 LT |
4575 | |
4576 | nfs4_lock_state(); | |
2dd6e458 | 4577 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4578 | if (status) |
203a8c8e | 4579 | goto out; |
38c2f4b1 | 4580 | dp = delegstateid(s); |
d5477a8d | 4581 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4582 | if (status) |
4583 | goto out; | |
203a8c8e | 4584 | |
3bd64a5b | 4585 | destroy_delegation(dp); |
1da177e4 | 4586 | out: |
203a8c8e BF |
4587 | nfs4_unlock_state(); |
4588 | ||
1da177e4 LT |
4589 | return status; |
4590 | } | |
4591 | ||
4592 | ||
1da177e4 | 4593 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4594 | |
87df4de8 BH |
4595 | static inline u64 |
4596 | end_offset(u64 start, u64 len) | |
4597 | { | |
4598 | u64 end; | |
4599 | ||
4600 | end = start + len; | |
4601 | return end >= start ? end: NFS4_MAX_UINT64; | |
4602 | } | |
4603 | ||
4604 | /* last octet in a range */ | |
4605 | static inline u64 | |
4606 | last_byte_offset(u64 start, u64 len) | |
4607 | { | |
4608 | u64 end; | |
4609 | ||
063b0fb9 | 4610 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4611 | end = start + len; |
4612 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4613 | } | |
4614 | ||
1da177e4 LT |
4615 | /* |
4616 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4617 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4618 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4619 | * locking, this prevents us from being completely protocol-compliant. The | |
4620 | * real solution to this problem is to start using unsigned file offsets in | |
4621 | * the VFS, but this is a very deep change! | |
4622 | */ | |
4623 | static inline void | |
4624 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4625 | { | |
4626 | if (lock->fl_start < 0) | |
4627 | lock->fl_start = OFFSET_MAX; | |
4628 | if (lock->fl_end < 0) | |
4629 | lock->fl_end = OFFSET_MAX; | |
4630 | } | |
4631 | ||
d5b9026a N |
4632 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4633 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4634 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4635 | }; |
1da177e4 LT |
4636 | |
4637 | static inline void | |
4638 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4639 | { | |
fe0750e5 | 4640 | struct nfs4_lockowner *lo; |
1da177e4 | 4641 | |
d5b9026a | 4642 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4643 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4644 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4645 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4646 | if (!deny->ld_owner.data) |
4647 | /* We just don't care that much */ | |
4648 | goto nevermind; | |
fe0750e5 BF |
4649 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4650 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4651 | } else { |
7c13f344 BF |
4652 | nevermind: |
4653 | deny->ld_owner.len = 0; | |
4654 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4655 | deny->ld_clientid.cl_boot = 0; |
4656 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4657 | } |
4658 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4659 | deny->ld_length = NFS4_MAX_UINT64; |
4660 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4661 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4662 | deny->ld_type = NFS4_READ_LT; | |
4663 | if (fl->fl_type != F_RDLCK) | |
4664 | deny->ld_type = NFS4_WRITE_LT; | |
4665 | } | |
4666 | ||
fe0750e5 | 4667 | static struct nfs4_lockowner * |
b3c32bcd TM |
4668 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4669 | struct nfsd_net *nn) | |
1da177e4 | 4670 | { |
b3c32bcd TM |
4671 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4672 | struct nfs4_stateowner *so; | |
1da177e4 | 4673 | |
b3c32bcd TM |
4674 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4675 | if (so->so_is_open_owner) | |
4676 | continue; | |
4677 | if (!same_owner_str(so, owner, clid)) | |
4678 | continue; | |
4679 | return lockowner(so); | |
1da177e4 LT |
4680 | } |
4681 | return NULL; | |
4682 | } | |
4683 | ||
4684 | /* | |
4685 | * Alloc a lock owner structure. | |
4686 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4687 | * occurred. |
1da177e4 | 4688 | * |
16bfdaaf | 4689 | * strhashval = ownerstr_hashval |
1da177e4 | 4690 | */ |
fe0750e5 | 4691 | static struct nfs4_lockowner * |
dcef0413 | 4692 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4693 | struct nfs4_lockowner *lo; |
b3c32bcd | 4694 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4695 | |
fe0750e5 BF |
4696 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4697 | if (!lo) | |
1da177e4 | 4698 | return NULL; |
fe0750e5 BF |
4699 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4700 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4701 | /* It is the openowner seqid that will be incremented in encode in the |
4702 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4703 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4704 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4705 | return lo; |
1da177e4 LT |
4706 | } |
4707 | ||
dcef0413 | 4708 | static struct nfs4_ol_stateid * |
f9c00c3a JL |
4709 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, |
4710 | struct inode *inode, | |
4711 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4712 | { |
b49e084d | 4713 | struct nfs4_stid *s; |
dcef0413 | 4714 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4715 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4716 | |
b49e084d JL |
4717 | s = nfs4_alloc_stid(clp, stateid_slab); |
4718 | if (s == NULL) | |
6136d2b4 | 4719 | return NULL; |
b49e084d | 4720 | stp = openlockstateid(s); |
3abdb607 | 4721 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 BF |
4722 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4723 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4724 | get_nfs4_file(fp); |
11b9164a | 4725 | stp->st_stid.sc_file = fp; |
b49e084d | 4726 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4727 | stp->st_access_bmap = 0; |
1da177e4 | 4728 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4729 | stp->st_openstp = open_stp; |
3c87b9b7 | 4730 | list_add(&stp->st_locks, &open_stp->st_locks); |
1d31a253 TM |
4731 | spin_lock(&fp->fi_lock); |
4732 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4733 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4734 | return stp; |
4735 | } | |
4736 | ||
c53530da JL |
4737 | static struct nfs4_ol_stateid * |
4738 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4739 | { | |
4740 | struct nfs4_ol_stateid *lst; | |
4741 | ||
4742 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
11b9164a | 4743 | if (lst->st_stid.sc_file == fp) |
c53530da JL |
4744 | return lst; |
4745 | } | |
4746 | return NULL; | |
4747 | } | |
4748 | ||
4749 | ||
fd39ca9a | 4750 | static int |
1da177e4 LT |
4751 | check_lock_length(u64 offset, u64 length) |
4752 | { | |
87df4de8 | 4753 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4754 | LOFF_OVERFLOW(offset, length))); |
4755 | } | |
4756 | ||
dcef0413 | 4757 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 4758 | { |
11b9164a | 4759 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 4760 | |
7214e860 JL |
4761 | lockdep_assert_held(&fp->fi_lock); |
4762 | ||
82c5ff1b | 4763 | if (test_access(access, lock_stp)) |
0997b173 | 4764 | return; |
12659651 | 4765 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4766 | set_access(access, lock_stp); |
0997b173 BF |
4767 | } |
4768 | ||
2355c596 | 4769 | static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
64a284d0 | 4770 | { |
11b9164a | 4771 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
4772 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
4773 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 4774 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
4775 | struct nfs4_lockowner *lo; |
4776 | unsigned int strhashval; | |
20e9e2bc | 4777 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4778 | |
b3c32bcd | 4779 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4780 | if (!lo) { |
4781 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4782 | &lock->v.new.owner); | |
4783 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4784 | if (lo == NULL) | |
4785 | return nfserr_jukebox; | |
4786 | } else { | |
4787 | /* with an existing lockowner, seqids must be the same */ | |
4788 | if (!cstate->minorversion && | |
4789 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4790 | return nfserr_bad_seqid; |
64a284d0 | 4791 | } |
c53530da JL |
4792 | |
4793 | *lst = find_lock_stateid(lo, fi); | |
64a284d0 | 4794 | if (*lst == NULL) { |
f9c00c3a | 4795 | *lst = alloc_init_lock_stateid(lo, fi, inode, ost); |
c53530da JL |
4796 | if (*lst == NULL) { |
4797 | release_lockowner_if_empty(lo); | |
4798 | return nfserr_jukebox; | |
4799 | } | |
4800 | *new = true; | |
64a284d0 | 4801 | } |
64a284d0 BF |
4802 | return nfs_ok; |
4803 | } | |
4804 | ||
1da177e4 LT |
4805 | /* |
4806 | * LOCK operation | |
4807 | */ | |
b37ad28b | 4808 | __be32 |
ca364317 | 4809 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4810 | struct nfsd4_lock *lock) |
1da177e4 | 4811 | { |
fe0750e5 BF |
4812 | struct nfs4_openowner *open_sop = NULL; |
4813 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4814 | struct nfs4_ol_stateid *lock_stp; |
7214e860 | 4815 | struct nfs4_file *fp; |
7d947842 | 4816 | struct file *filp = NULL; |
21179d81 JL |
4817 | struct file_lock *file_lock = NULL; |
4818 | struct file_lock *conflock = NULL; | |
b37ad28b | 4819 | __be32 status = 0; |
64a284d0 | 4820 | bool new_state = false; |
b34f27aa | 4821 | int lkflg; |
b8dd7b9a | 4822 | int err; |
3320fef1 SK |
4823 | struct net *net = SVC_NET(rqstp); |
4824 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4825 | |
4826 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4827 | (long long) lock->lk_offset, | |
4828 | (long long) lock->lk_length); | |
4829 | ||
1da177e4 LT |
4830 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4831 | return nfserr_inval; | |
4832 | ||
ca364317 | 4833 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4834 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4835 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4836 | return status; | |
4837 | } | |
4838 | ||
1da177e4 LT |
4839 | nfs4_lock_state(); |
4840 | ||
4841 | if (lock->lk_is_new) { | |
dcef0413 | 4842 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4843 | |
4844 | if (nfsd4_has_session(cstate)) | |
4845 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4846 | memcpy(&lock->v.new.clientid, | |
4847 | &cstate->session->se_client->cl_clientid, | |
4848 | sizeof(clientid_t)); | |
4849 | ||
1da177e4 | 4850 | status = nfserr_stale_clientid; |
2c142baa | 4851 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4852 | goto out; |
1da177e4 | 4853 | |
1da177e4 | 4854 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4855 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4856 | lock->lk_new_open_seqid, |
4857 | &lock->lk_new_open_stateid, | |
3320fef1 | 4858 | &open_stp, nn); |
37515177 | 4859 | if (status) |
1da177e4 | 4860 | goto out; |
fe0750e5 | 4861 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4862 | status = nfserr_bad_stateid; |
684e5638 | 4863 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4864 | &lock->v.new.clientid)) |
4865 | goto out; | |
64a284d0 BF |
4866 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4867 | &lock_stp, &new_state); | |
e1aaa891 | 4868 | } else |
dd453dfd | 4869 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4870 | lock->lk_old_lock_seqid, |
4871 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4872 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4873 | if (status) |
4874 | goto out; | |
64a284d0 | 4875 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4876 | |
b34f27aa BF |
4877 | lkflg = setlkflg(lock->lk_type); |
4878 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4879 | if (status) | |
4880 | goto out; | |
4881 | ||
0dd395dc | 4882 | status = nfserr_grace; |
3320fef1 | 4883 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4884 | goto out; |
4885 | status = nfserr_no_grace; | |
3320fef1 | 4886 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4887 | goto out; |
4888 | ||
21179d81 JL |
4889 | file_lock = locks_alloc_lock(); |
4890 | if (!file_lock) { | |
4891 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4892 | status = nfserr_jukebox; | |
4893 | goto out; | |
4894 | } | |
4895 | ||
11b9164a | 4896 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 4897 | locks_init_lock(file_lock); |
1da177e4 LT |
4898 | switch (lock->lk_type) { |
4899 | case NFS4_READ_LT: | |
4900 | case NFS4_READW_LT: | |
7214e860 JL |
4901 | spin_lock(&fp->fi_lock); |
4902 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
4903 | if (filp) |
4904 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 4905 | spin_unlock(&fp->fi_lock); |
21179d81 | 4906 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4907 | break; |
1da177e4 LT |
4908 | case NFS4_WRITE_LT: |
4909 | case NFS4_WRITEW_LT: | |
7214e860 JL |
4910 | spin_lock(&fp->fi_lock); |
4911 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
4912 | if (filp) |
4913 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 4914 | spin_unlock(&fp->fi_lock); |
21179d81 | 4915 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4916 | break; |
1da177e4 LT |
4917 | default: |
4918 | status = nfserr_inval; | |
4919 | goto out; | |
4920 | } | |
f9d7562f BF |
4921 | if (!filp) { |
4922 | status = nfserr_openmode; | |
4923 | goto out; | |
4924 | } | |
21179d81 JL |
4925 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4926 | file_lock->fl_pid = current->tgid; | |
4927 | file_lock->fl_file = filp; | |
4928 | file_lock->fl_flags = FL_POSIX; | |
4929 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4930 | file_lock->fl_start = lock->lk_offset; | |
4931 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4932 | nfs4_transform_lock_offset(file_lock); | |
4933 | ||
4934 | conflock = locks_alloc_lock(); | |
4935 | if (!conflock) { | |
4936 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4937 | status = nfserr_jukebox; | |
4938 | goto out; | |
4939 | } | |
1da177e4 | 4940 | |
21179d81 | 4941 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4942 | switch (-err) { |
1da177e4 | 4943 | case 0: /* success! */ |
dcef0413 BF |
4944 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4945 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4946 | sizeof(stateid_t)); |
b8dd7b9a | 4947 | status = 0; |
eb76b3fd AA |
4948 | break; |
4949 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4950 | status = nfserr_denied; | |
4951 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4952 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4953 | break; |
1da177e4 LT |
4954 | case (EDEADLK): |
4955 | status = nfserr_deadlock; | |
eb76b3fd | 4956 | break; |
3e772463 | 4957 | default: |
fd85b817 | 4958 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4959 | status = nfserrno(err); |
eb76b3fd | 4960 | break; |
1da177e4 | 4961 | } |
1da177e4 | 4962 | out: |
de18643d TM |
4963 | if (filp) |
4964 | fput(filp); | |
64a284d0 | 4965 | if (status && new_state) |
c53530da | 4966 | release_lock_stateid(lock_stp); |
9411b1d4 | 4967 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4968 | if (!cstate->replay_owner) |
4969 | nfs4_unlock_state(); | |
21179d81 JL |
4970 | if (file_lock) |
4971 | locks_free_lock(file_lock); | |
4972 | if (conflock) | |
4973 | locks_free_lock(conflock); | |
1da177e4 LT |
4974 | return status; |
4975 | } | |
4976 | ||
55ef1274 BF |
4977 | /* |
4978 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4979 | * so we do a temporary open here just to get an open file to pass to | |
4980 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4981 | * inode operation.) | |
4982 | */ | |
04da6e9d | 4983 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4984 | { |
4985 | struct file *file; | |
04da6e9d AV |
4986 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4987 | if (!err) { | |
4988 | err = nfserrno(vfs_test_lock(file, lock)); | |
4989 | nfsd_close(file); | |
4990 | } | |
55ef1274 BF |
4991 | return err; |
4992 | } | |
4993 | ||
1da177e4 LT |
4994 | /* |
4995 | * LOCKT operation | |
4996 | */ | |
b37ad28b | 4997 | __be32 |
ca364317 BF |
4998 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4999 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5000 | { |
21179d81 | 5001 | struct file_lock *file_lock = NULL; |
fe0750e5 | 5002 | struct nfs4_lockowner *lo; |
b37ad28b | 5003 | __be32 status; |
7f2210fa | 5004 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5005 | |
5ccb0066 | 5006 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5007 | return nfserr_grace; |
5008 | ||
5009 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5010 | return nfserr_inval; | |
5011 | ||
1da177e4 LT |
5012 | nfs4_lock_state(); |
5013 | ||
9b2ef62b | 5014 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5015 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5016 | if (status) |
5017 | goto out; | |
5018 | } | |
1da177e4 | 5019 | |
75c096f7 | 5020 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5021 | goto out; |
1da177e4 | 5022 | |
21179d81 JL |
5023 | file_lock = locks_alloc_lock(); |
5024 | if (!file_lock) { | |
5025 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5026 | status = nfserr_jukebox; | |
5027 | goto out; | |
5028 | } | |
5029 | locks_init_lock(file_lock); | |
1da177e4 LT |
5030 | switch (lockt->lt_type) { |
5031 | case NFS4_READ_LT: | |
5032 | case NFS4_READW_LT: | |
21179d81 | 5033 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5034 | break; |
5035 | case NFS4_WRITE_LT: | |
5036 | case NFS4_WRITEW_LT: | |
21179d81 | 5037 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5038 | break; |
5039 | default: | |
2fdada03 | 5040 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5041 | status = nfserr_inval; |
5042 | goto out; | |
5043 | } | |
5044 | ||
b3c32bcd | 5045 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 5046 | if (lo) |
21179d81 JL |
5047 | file_lock->fl_owner = (fl_owner_t)lo; |
5048 | file_lock->fl_pid = current->tgid; | |
5049 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5050 | |
21179d81 JL |
5051 | file_lock->fl_start = lockt->lt_offset; |
5052 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5053 | |
21179d81 | 5054 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5055 | |
21179d81 | 5056 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5057 | if (status) |
fd85b817 | 5058 | goto out; |
04da6e9d | 5059 | |
21179d81 | 5060 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5061 | status = nfserr_denied; |
21179d81 | 5062 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5063 | } |
5064 | out: | |
5065 | nfs4_unlock_state(); | |
21179d81 JL |
5066 | if (file_lock) |
5067 | locks_free_lock(file_lock); | |
1da177e4 LT |
5068 | return status; |
5069 | } | |
5070 | ||
b37ad28b | 5071 | __be32 |
ca364317 | 5072 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5073 | struct nfsd4_locku *locku) |
1da177e4 | 5074 | { |
dcef0413 | 5075 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5076 | struct file *filp = NULL; |
21179d81 | 5077 | struct file_lock *file_lock = NULL; |
b37ad28b | 5078 | __be32 status; |
b8dd7b9a | 5079 | int err; |
3320fef1 SK |
5080 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5081 | ||
1da177e4 LT |
5082 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5083 | (long long) locku->lu_offset, | |
5084 | (long long) locku->lu_length); | |
5085 | ||
5086 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5087 | return nfserr_inval; | |
5088 | ||
5089 | nfs4_lock_state(); | |
5090 | ||
9072d5c6 | 5091 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5092 | &locku->lu_stateid, NFS4_LOCK_STID, |
5093 | &stp, nn); | |
9072d5c6 | 5094 | if (status) |
1da177e4 | 5095 | goto out; |
11b9164a | 5096 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5097 | if (!filp) { |
5098 | status = nfserr_lock_range; | |
5099 | goto out; | |
5100 | } | |
21179d81 JL |
5101 | file_lock = locks_alloc_lock(); |
5102 | if (!file_lock) { | |
5103 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5104 | status = nfserr_jukebox; | |
de18643d | 5105 | goto fput; |
21179d81 JL |
5106 | } |
5107 | locks_init_lock(file_lock); | |
5108 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5109 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5110 | file_lock->fl_pid = current->tgid; |
5111 | file_lock->fl_file = filp; | |
5112 | file_lock->fl_flags = FL_POSIX; | |
5113 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5114 | file_lock->fl_start = locku->lu_offset; | |
5115 | ||
5116 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5117 | locku->lu_length); | |
5118 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5119 | |
21179d81 | 5120 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5121 | if (err) { |
fd85b817 | 5122 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5123 | goto out_nfserr; |
5124 | } | |
dcef0413 BF |
5125 | update_stateid(&stp->st_stid.sc_stateid); |
5126 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5127 | fput: |
5128 | fput(filp); | |
1da177e4 | 5129 | out: |
9411b1d4 | 5130 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
5131 | if (!cstate->replay_owner) |
5132 | nfs4_unlock_state(); | |
21179d81 JL |
5133 | if (file_lock) |
5134 | locks_free_lock(file_lock); | |
1da177e4 LT |
5135 | return status; |
5136 | ||
5137 | out_nfserr: | |
b8dd7b9a | 5138 | status = nfserrno(err); |
de18643d | 5139 | goto fput; |
1da177e4 LT |
5140 | } |
5141 | ||
5142 | /* | |
5143 | * returns | |
f9c00c3a JL |
5144 | * true: locks held by lockowner |
5145 | * false: no locks held by lockowner | |
1da177e4 | 5146 | */ |
f9c00c3a JL |
5147 | static bool |
5148 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5149 | { |
5150 | struct file_lock **flpp; | |
f9c00c3a JL |
5151 | int status = false; |
5152 | struct file *filp = find_any_file(fp); | |
5153 | struct inode *inode; | |
5154 | ||
5155 | if (!filp) { | |
5156 | /* Any valid lock stateid should have some sort of access */ | |
5157 | WARN_ON_ONCE(1); | |
5158 | return status; | |
5159 | } | |
5160 | ||
5161 | inode = file_inode(filp); | |
1da177e4 | 5162 | |
1c8c601a | 5163 | spin_lock(&inode->i_lock); |
1da177e4 | 5164 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5165 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5166 | status = true; |
5167 | break; | |
796dadfd | 5168 | } |
1da177e4 | 5169 | } |
1c8c601a | 5170 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5171 | fput(filp); |
1da177e4 LT |
5172 | return status; |
5173 | } | |
5174 | ||
b37ad28b | 5175 | __be32 |
b591480b BF |
5176 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5177 | struct nfsd4_compound_state *cstate, | |
5178 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5179 | { |
5180 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 5181 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 5182 | struct nfs4_lockowner *lo; |
dcef0413 | 5183 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5184 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 5185 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 5186 | __be32 status; |
7f2210fa | 5187 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
5188 | |
5189 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5190 | clid->cl_boot, clid->cl_id); | |
5191 | ||
1da177e4 LT |
5192 | nfs4_lock_state(); |
5193 | ||
4b24ca7d | 5194 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5195 | if (status) |
5196 | goto out; | |
5197 | ||
3e9e3dbe | 5198 | status = nfserr_locks_held; |
06f1f864 | 5199 | |
fd44907c JL |
5200 | /* Find the matching lock stateowner */ |
5201 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
5202 | if (tmp->so_is_open_owner) | |
06f1f864 | 5203 | continue; |
fd44907c JL |
5204 | if (same_owner_str(tmp, owner, clid)) { |
5205 | sop = tmp; | |
5206 | break; | |
1da177e4 | 5207 | } |
3e9e3dbe | 5208 | } |
fd44907c JL |
5209 | |
5210 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
5211 | if (!sop) { | |
5212 | status = nfs_ok; | |
5213 | goto out; | |
5214 | } | |
5215 | ||
5216 | lo = lockowner(sop); | |
5217 | /* see if there are still any locks associated with it */ | |
5218 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
11b9164a | 5219 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
fd44907c | 5220 | goto out; |
1da177e4 | 5221 | } |
fd44907c JL |
5222 | |
5223 | status = nfs_ok; | |
5224 | release_lockowner(lo); | |
1da177e4 LT |
5225 | out: |
5226 | nfs4_unlock_state(); | |
5227 | return status; | |
5228 | } | |
5229 | ||
5230 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5231 | alloc_reclaim(void) |
1da177e4 | 5232 | { |
a55370a3 | 5233 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5234 | } |
5235 | ||
0ce0c2b5 | 5236 | bool |
52e19c09 | 5237 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5238 | { |
0ce0c2b5 | 5239 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5240 | |
52e19c09 | 5241 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5242 | return (crp && crp->cr_clp); |
c7b9a459 N |
5243 | } |
5244 | ||
1da177e4 LT |
5245 | /* |
5246 | * failure => all reset bets are off, nfserr_no_grace... | |
5247 | */ | |
772a9bbb | 5248 | struct nfs4_client_reclaim * |
52e19c09 | 5249 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5250 | { |
5251 | unsigned int strhashval; | |
772a9bbb | 5252 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5253 | |
a55370a3 N |
5254 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5255 | crp = alloc_reclaim(); | |
772a9bbb JL |
5256 | if (crp) { |
5257 | strhashval = clientstr_hashval(name); | |
5258 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5259 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5260 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5261 | crp->cr_clp = NULL; |
52e19c09 | 5262 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5263 | } |
5264 | return crp; | |
1da177e4 LT |
5265 | } |
5266 | ||
ce30e539 | 5267 | void |
52e19c09 | 5268 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5269 | { |
5270 | list_del(&crp->cr_strhash); | |
5271 | kfree(crp); | |
52e19c09 | 5272 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5273 | } |
5274 | ||
2a4317c5 | 5275 | void |
52e19c09 | 5276 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5277 | { |
5278 | struct nfs4_client_reclaim *crp = NULL; | |
5279 | int i; | |
5280 | ||
1da177e4 | 5281 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5282 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5283 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5284 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5285 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5286 | } |
5287 | } | |
063b0fb9 | 5288 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5289 | } |
5290 | ||
5291 | /* | |
5292 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5293 | struct nfs4_client_reclaim * |
52e19c09 | 5294 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5295 | { |
5296 | unsigned int strhashval; | |
1da177e4 LT |
5297 | struct nfs4_client_reclaim *crp = NULL; |
5298 | ||
278c931c | 5299 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5300 | |
278c931c | 5301 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5302 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5303 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5304 | return crp; |
5305 | } | |
5306 | } | |
5307 | return NULL; | |
5308 | } | |
5309 | ||
5310 | /* | |
5311 | * Called from OPEN. Look for clientid in reclaim list. | |
5312 | */ | |
b37ad28b | 5313 | __be32 |
0fe492db TM |
5314 | nfs4_check_open_reclaim(clientid_t *clid, |
5315 | struct nfsd4_compound_state *cstate, | |
5316 | struct nfsd_net *nn) | |
1da177e4 | 5317 | { |
0fe492db | 5318 | __be32 status; |
a52d726b JL |
5319 | |
5320 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5321 | status = lookup_clientid(clid, cstate, nn); |
5322 | if (status) | |
a52d726b JL |
5323 | return nfserr_reclaim_bad; |
5324 | ||
0fe492db TM |
5325 | if (nfsd4_client_record_check(cstate->clp)) |
5326 | return nfserr_reclaim_bad; | |
5327 | ||
5328 | return nfs_ok; | |
1da177e4 LT |
5329 | } |
5330 | ||
65178db4 BS |
5331 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5332 | ||
44e34da6 BS |
5333 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5334 | { | |
221a6876 BF |
5335 | if (mark_client_expired(clp)) |
5336 | return 0; | |
44e34da6 BS |
5337 | expire_client(clp); |
5338 | return 1; | |
5339 | } | |
5340 | ||
184c1847 BS |
5341 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5342 | { | |
5343 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5344 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5345 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5346 | return 1; | |
5347 | } | |
5348 | ||
5349 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5350 | const char *type) | |
5351 | { | |
5352 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5353 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5354 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5355 | } | |
5356 | ||
3c87b9b7 TM |
5357 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5358 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5359 | { |
5360 | struct nfs4_openowner *oop; | |
fc29171f | 5361 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5362 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5363 | u64 count = 0; |
5364 | ||
5365 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5366 | list_for_each_entry_safe(stp, st_next, |
5367 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5368 | list_for_each_entry_safe(lst, lst_next, | |
5369 | &stp->st_locks, st_locks) { | |
fc29171f | 5370 | if (func) |
3c87b9b7 | 5371 | func(lst); |
fc29171f BS |
5372 | if (++count == max) |
5373 | return count; | |
5374 | } | |
5375 | } | |
5376 | } | |
5377 | ||
5378 | return count; | |
5379 | } | |
5380 | ||
5381 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5382 | { | |
3c87b9b7 | 5383 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5384 | } |
5385 | ||
184c1847 BS |
5386 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5387 | { | |
5388 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5389 | nfsd_print_count(clp, count, "locked files"); | |
5390 | return count; | |
5391 | } | |
5392 | ||
4dbdbda8 BS |
5393 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5394 | { | |
5395 | struct nfs4_openowner *oop, *next; | |
5396 | u64 count = 0; | |
5397 | ||
5398 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5399 | if (func) | |
5400 | func(oop); | |
5401 | if (++count == max) | |
5402 | break; | |
5403 | } | |
5404 | ||
5405 | return count; | |
5406 | } | |
5407 | ||
5408 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5409 | { | |
5410 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5411 | } | |
5412 | ||
184c1847 BS |
5413 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5414 | { | |
5415 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5416 | nfsd_print_count(clp, count, "open files"); | |
5417 | return count; | |
5418 | } | |
5419 | ||
269de30f BS |
5420 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5421 | struct list_head *victims) | |
5422 | { | |
5423 | struct nfs4_delegation *dp, *next; | |
5424 | u64 count = 0; | |
5425 | ||
cdc97505 | 5426 | lockdep_assert_held(&state_lock); |
269de30f | 5427 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5428 | if (victims) { |
5429 | /* | |
5430 | * It's not safe to mess with delegations that have a | |
5431 | * non-zero dl_time. They might have already been broken | |
5432 | * and could be processed by the laundromat outside of | |
5433 | * the state_lock. Just leave them be. | |
5434 | */ | |
5435 | if (dp->dl_time != 0) | |
5436 | continue; | |
5437 | ||
42690676 JL |
5438 | unhash_delegation_locked(dp); |
5439 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5440 | } |
269de30f BS |
5441 | if (++count == max) |
5442 | break; | |
5443 | } | |
5444 | return count; | |
5445 | } | |
5446 | ||
5447 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5448 | { | |
5449 | struct nfs4_delegation *dp, *next; | |
5450 | LIST_HEAD(victims); | |
5451 | u64 count; | |
5452 | ||
cdc97505 | 5453 | spin_lock(&state_lock); |
269de30f | 5454 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5455 | spin_unlock(&state_lock); |
269de30f | 5456 | |
2d4a532d JL |
5457 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5458 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5459 | revoke_delegation(dp); |
2d4a532d | 5460 | } |
269de30f BS |
5461 | |
5462 | return count; | |
5463 | } | |
5464 | ||
5465 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5466 | { | |
dff1399f | 5467 | struct nfs4_delegation *dp; |
269de30f BS |
5468 | LIST_HEAD(victims); |
5469 | u64 count; | |
5470 | ||
cdc97505 | 5471 | spin_lock(&state_lock); |
269de30f | 5472 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5473 | while (!list_empty(&victims)) { |
5474 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5475 | dl_recall_lru); | |
5476 | list_del_init(&dp->dl_recall_lru); | |
5477 | dp->dl_time = 0; | |
269de30f | 5478 | nfsd_break_one_deleg(dp); |
dff1399f | 5479 | } |
cdc97505 | 5480 | spin_unlock(&state_lock); |
269de30f BS |
5481 | |
5482 | return count; | |
5483 | } | |
5484 | ||
184c1847 BS |
5485 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5486 | { | |
5487 | u64 count = 0; | |
5488 | ||
cdc97505 | 5489 | spin_lock(&state_lock); |
184c1847 | 5490 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5491 | spin_unlock(&state_lock); |
184c1847 BS |
5492 | |
5493 | nfsd_print_count(clp, count, "delegations"); | |
5494 | return count; | |
5495 | } | |
5496 | ||
44e34da6 | 5497 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5498 | { |
5499 | struct nfs4_client *clp, *next; | |
44e34da6 | 5500 | u64 count = 0; |
3320fef1 | 5501 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5502 | |
44e34da6 BS |
5503 | if (!nfsd_netns_ready(nn)) |
5504 | return 0; | |
5505 | ||
5ed58bb2 | 5506 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5507 | count += func(clp, max - count); |
5508 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5509 | break; |
5510 | } | |
65178db4 | 5511 | |
44e34da6 BS |
5512 | return count; |
5513 | } | |
5514 | ||
6c1e82a4 BS |
5515 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5516 | { | |
5517 | struct nfs4_client *clp; | |
5518 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5519 | ||
5520 | if (!nfsd_netns_ready(nn)) | |
5521 | return NULL; | |
5522 | ||
5523 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5524 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5525 | return clp; | |
5526 | } | |
5527 | return NULL; | |
5528 | } | |
5529 | ||
65178db4 BS |
5530 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5531 | ||
c2f1a551 MS |
5532 | /* |
5533 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5534 | * client may quite reasonably hang on to a delegation as long as it has | |
5535 | * the inode cached. This becomes an obvious problem the first time a | |
5536 | * client's inode cache approaches the size of the server's total memory. | |
5537 | * | |
5538 | * For now we avoid this problem by imposing a hard limit on the number | |
5539 | * of delegations, which varies according to the server's memory size. | |
5540 | */ | |
5541 | static void | |
5542 | set_max_delegations(void) | |
5543 | { | |
5544 | /* | |
5545 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5546 | * estimates suggest that in the worst case (where every delegation | |
5547 | * is for a different inode), a delegation could take about 1.5K, | |
5548 | * giving a worst case usage of about 6% of memory. | |
5549 | */ | |
5550 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5551 | } | |
5552 | ||
d85ed443 | 5553 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5554 | { |
5555 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5556 | int i; | |
5557 | ||
5558 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5559 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5560 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5561 | goto err; |
0a7ec377 SK |
5562 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5563 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5564 | if (!nn->unconf_id_hashtbl) | |
5565 | goto err_unconf_id; | |
9b531137 SK |
5566 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5567 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5568 | if (!nn->ownerstr_hashtbl) | |
5569 | goto err_ownerstr; | |
1872de0e SK |
5570 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5571 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5572 | if (!nn->sessionid_hashtbl) | |
5573 | goto err_sessionid; | |
8daae4dc | 5574 | |
382a62e7 | 5575 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5576 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5577 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5578 | } |
9b531137 SK |
5579 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5580 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5581 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5582 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5583 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5584 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5585 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5586 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5587 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5588 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5589 | |
09121281 | 5590 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5591 | get_net(net); |
09121281 | 5592 | |
8daae4dc | 5593 | return 0; |
382a62e7 | 5594 | |
1872de0e | 5595 | err_sessionid: |
20e9e2bc | 5596 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5597 | err_ownerstr: |
5598 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5599 | err_unconf_id: |
5600 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5601 | err: |
5602 | return -ENOMEM; | |
8daae4dc SK |
5603 | } |
5604 | ||
5605 | static void | |
4dce0ac9 | 5606 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5607 | { |
5608 | int i; | |
5609 | struct nfs4_client *clp = NULL; | |
5610 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5611 | ||
5612 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5613 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5614 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5615 | destroy_client(clp); | |
5616 | } | |
5617 | } | |
a99454aa | 5618 | |
2b905635 KM |
5619 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5620 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5621 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5622 | destroy_client(clp); | |
5623 | } | |
a99454aa SK |
5624 | } |
5625 | ||
1872de0e | 5626 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5627 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5628 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5629 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5630 | put_net(net); |
8daae4dc SK |
5631 | } |
5632 | ||
f252bc68 | 5633 | int |
d85ed443 | 5634 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5635 | { |
5e1533c7 | 5636 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5637 | int ret; |
5638 | ||
d85ed443 | 5639 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5640 | if (ret) |
5641 | return ret; | |
5e1533c7 | 5642 | nfsd4_client_tracking_init(net); |
2c142baa | 5643 | nn->boot_time = get_seconds(); |
5ccb0066 | 5644 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5645 | nn->grace_ended = false; |
d85ed443 | 5646 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5647 | nn->nfsd4_grace, net); |
5648 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5649 | return 0; |
5650 | } | |
5651 | ||
5652 | /* initialization to perform when the nfsd service is started: */ | |
5653 | ||
5654 | int | |
5655 | nfs4_state_start(void) | |
5656 | { | |
5657 | int ret; | |
5658 | ||
b5a1a81e | 5659 | ret = set_callback_cred(); |
d85ed443 SK |
5660 | if (ret) |
5661 | return -ENOMEM; | |
58da282b | 5662 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5663 | if (laundry_wq == NULL) { |
5664 | ret = -ENOMEM; | |
5665 | goto out_recovery; | |
5666 | } | |
b5a1a81e BF |
5667 | ret = nfsd4_create_callback_queue(); |
5668 | if (ret) | |
5669 | goto out_free_laundry; | |
09121281 | 5670 | |
c2f1a551 | 5671 | set_max_delegations(); |
d85ed443 | 5672 | |
b5a1a81e | 5673 | return 0; |
d85ed443 | 5674 | |
b5a1a81e BF |
5675 | out_free_laundry: |
5676 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5677 | out_recovery: |
b5a1a81e | 5678 | return ret; |
1da177e4 LT |
5679 | } |
5680 | ||
f252bc68 | 5681 | void |
4dce0ac9 | 5682 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5683 | { |
1da177e4 | 5684 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5685 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5686 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5687 | |
4dce0ac9 SK |
5688 | cancel_delayed_work_sync(&nn->laundromat_work); |
5689 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5690 | |
e50a26dc | 5691 | nfs4_lock_state(); |
1da177e4 | 5692 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5693 | spin_lock(&state_lock); |
e8c69d17 | 5694 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5695 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5696 | unhash_delegation_locked(dp); |
5697 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5698 | } |
cdc97505 | 5699 | spin_unlock(&state_lock); |
1da177e4 LT |
5700 | list_for_each_safe(pos, next, &reaplist) { |
5701 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5702 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5703 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5704 | } |
5705 | ||
3320fef1 | 5706 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5707 | nfs4_state_destroy_net(net); |
e50a26dc | 5708 | nfs4_unlock_state(); |
1da177e4 LT |
5709 | } |
5710 | ||
5711 | void | |
5712 | nfs4_state_shutdown(void) | |
5713 | { | |
5e8d5c29 | 5714 | destroy_workqueue(laundry_wq); |
c3935e30 | 5715 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5716 | } |
8b70484c TM |
5717 | |
5718 | static void | |
5719 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5720 | { | |
37c593c5 TM |
5721 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5722 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5723 | } |
5724 | ||
5725 | static void | |
5726 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5727 | { | |
37c593c5 TM |
5728 | if (cstate->minorversion) { |
5729 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5730 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5731 | } | |
5732 | } | |
5733 | ||
5734 | void | |
5735 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5736 | { | |
5737 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5738 | } |
5739 | ||
62cd4a59 TM |
5740 | /* |
5741 | * functions to set current state id | |
5742 | */ | |
9428fe1a TM |
5743 | void |
5744 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5745 | { | |
5746 | put_stateid(cstate, &odp->od_stateid); | |
5747 | } | |
5748 | ||
8b70484c TM |
5749 | void |
5750 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5751 | { | |
5752 | put_stateid(cstate, &open->op_stateid); | |
5753 | } | |
5754 | ||
62cd4a59 TM |
5755 | void |
5756 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5757 | { | |
5758 | put_stateid(cstate, &close->cl_stateid); | |
5759 | } | |
5760 | ||
5761 | void | |
5762 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5763 | { | |
5764 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5765 | } | |
5766 | ||
5767 | /* | |
5768 | * functions to consume current state id | |
5769 | */ | |
1e97b519 | 5770 | |
9428fe1a TM |
5771 | void |
5772 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5773 | { | |
5774 | get_stateid(cstate, &odp->od_stateid); | |
5775 | } | |
5776 | ||
5777 | void | |
5778 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5779 | { | |
5780 | get_stateid(cstate, &drp->dr_stateid); | |
5781 | } | |
5782 | ||
1e97b519 TM |
5783 | void |
5784 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5785 | { | |
5786 | get_stateid(cstate, &fsp->fr_stateid); | |
5787 | } | |
5788 | ||
5789 | void | |
5790 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5791 | { | |
5792 | get_stateid(cstate, &setattr->sa_stateid); | |
5793 | } | |
5794 | ||
8b70484c TM |
5795 | void |
5796 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5797 | { | |
5798 | get_stateid(cstate, &close->cl_stateid); | |
5799 | } | |
5800 | ||
5801 | void | |
62cd4a59 | 5802 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5803 | { |
62cd4a59 | 5804 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5805 | } |
30813e27 TM |
5806 | |
5807 | void | |
5808 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5809 | { | |
5810 | get_stateid(cstate, &read->rd_stateid); | |
5811 | } | |
5812 | ||
5813 | void | |
5814 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5815 | { | |
5816 | get_stateid(cstate, &write->wr_stateid); | |
5817 | } |