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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
f9c00c3a | 73 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 74 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* Locking: */ |
77 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
b401be22 JL |
88 | /* |
89 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
90 | * the refcount on the open stateid to drop. | |
91 | */ | |
92 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
93 | ||
abf1135b CH |
94 | static struct kmem_cache *openowner_slab; |
95 | static struct kmem_cache *lockowner_slab; | |
96 | static struct kmem_cache *file_slab; | |
97 | static struct kmem_cache *stateid_slab; | |
98 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 99 | |
1da177e4 LT |
100 | void |
101 | nfs4_lock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_lock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
66b2b9b2 | 106 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 107 | |
f0f51f5c | 108 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 109 | { |
f0f51f5c | 110 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
111 | } |
112 | ||
f0f51f5c | 113 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 114 | { |
f0f51f5c | 115 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
116 | return nfserr_jukebox; |
117 | ses->se_flags |= NFS4_SESSION_DEAD; | |
118 | return nfs_ok; | |
508dc6e1 BH |
119 | } |
120 | ||
1da177e4 LT |
121 | void |
122 | nfs4_unlock_state(void) | |
123 | { | |
353ab6e9 | 124 | mutex_unlock(&client_mutex); |
1da177e4 LT |
125 | } |
126 | ||
221a6876 BF |
127 | static bool is_client_expired(struct nfs4_client *clp) |
128 | { | |
129 | return clp->cl_time == 0; | |
130 | } | |
131 | ||
221a6876 BF |
132 | static __be32 get_client_locked(struct nfs4_client *clp) |
133 | { | |
0a880a28 TM |
134 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
135 | ||
136 | lockdep_assert_held(&nn->client_lock); | |
137 | ||
221a6876 BF |
138 | if (is_client_expired(clp)) |
139 | return nfserr_expired; | |
140 | atomic_inc(&clp->cl_refcount); | |
141 | return nfs_ok; | |
142 | } | |
143 | ||
144 | /* must be called under the client_lock */ | |
145 | static inline void | |
146 | renew_client_locked(struct nfs4_client *clp) | |
147 | { | |
148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
149 | ||
150 | if (is_client_expired(clp)) { | |
151 | WARN_ON(1); | |
152 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
153 | __func__, | |
154 | clp->cl_clientid.cl_boot, | |
155 | clp->cl_clientid.cl_id); | |
156 | return; | |
157 | } | |
158 | ||
159 | dprintk("renewing client (clientid %08x/%08x)\n", | |
160 | clp->cl_clientid.cl_boot, | |
161 | clp->cl_clientid.cl_id); | |
162 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
163 | clp->cl_time = get_seconds(); | |
164 | } | |
165 | ||
166 | static inline void | |
167 | renew_client(struct nfs4_client *clp) | |
168 | { | |
169 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
170 | ||
171 | spin_lock(&nn->client_lock); | |
172 | renew_client_locked(clp); | |
173 | spin_unlock(&nn->client_lock); | |
174 | } | |
175 | ||
ba138435 | 176 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 177 | { |
0a880a28 TM |
178 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
179 | ||
180 | lockdep_assert_held(&nn->client_lock); | |
181 | ||
221a6876 BF |
182 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
183 | return; | |
184 | if (!is_client_expired(clp)) | |
185 | renew_client_locked(clp); | |
186 | } | |
187 | ||
4b24ca7d JL |
188 | static void put_client_renew(struct nfs4_client *clp) |
189 | { | |
190 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
191 | ||
d6c249b4 JL |
192 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
193 | return; | |
194 | if (!is_client_expired(clp)) | |
195 | renew_client_locked(clp); | |
4b24ca7d JL |
196 | spin_unlock(&nn->client_lock); |
197 | } | |
198 | ||
d4e19e70 TM |
199 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
200 | { | |
201 | __be32 status; | |
202 | ||
203 | if (is_session_dead(ses)) | |
204 | return nfserr_badsession; | |
205 | status = get_client_locked(ses->se_client); | |
206 | if (status) | |
207 | return status; | |
208 | atomic_inc(&ses->se_ref); | |
209 | return nfs_ok; | |
210 | } | |
211 | ||
212 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
213 | { | |
214 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
215 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
216 | ||
217 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
218 | |
219 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
220 | free_session(ses); | |
221 | put_client_renew_locked(clp); | |
222 | } | |
223 | ||
224 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
225 | { | |
226 | struct nfs4_client *clp = ses->se_client; | |
227 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
228 | ||
229 | spin_lock(&nn->client_lock); | |
230 | nfsd4_put_session_locked(ses); | |
231 | spin_unlock(&nn->client_lock); | |
232 | } | |
233 | ||
7ffb5880 | 234 | static int |
d4f0489f | 235 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
236 | { |
237 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 238 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
239 | } |
240 | ||
241 | static struct nfs4_openowner * | |
242 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 243 | struct nfs4_client *clp) |
7ffb5880 TM |
244 | { |
245 | struct nfs4_stateowner *so; | |
7ffb5880 | 246 | |
d4f0489f | 247 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 248 | |
d4f0489f TM |
249 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
250 | so_strhash) { | |
7ffb5880 TM |
251 | if (!so->so_is_open_owner) |
252 | continue; | |
d4f0489f | 253 | if (same_owner_str(so, &open->op_owner)) { |
7ffb5880 | 254 | atomic_inc(&so->so_count); |
d4f0489f | 255 | return openowner(so); |
7ffb5880 TM |
256 | } |
257 | } | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | static struct nfs4_openowner * | |
262 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 263 | struct nfs4_client *clp) |
7ffb5880 TM |
264 | { |
265 | struct nfs4_openowner *oo; | |
266 | ||
d4f0489f TM |
267 | spin_lock(&clp->cl_lock); |
268 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
269 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
270 | return oo; |
271 | } | |
272 | ||
1da177e4 LT |
273 | static inline u32 |
274 | opaque_hashval(const void *ptr, int nbytes) | |
275 | { | |
276 | unsigned char *cptr = (unsigned char *) ptr; | |
277 | ||
278 | u32 x = 0; | |
279 | while (nbytes--) { | |
280 | x *= 37; | |
281 | x += *cptr++; | |
282 | } | |
283 | return x; | |
284 | } | |
285 | ||
32513b40 BF |
286 | static void nfsd4_free_file(struct nfs4_file *f) |
287 | { | |
288 | kmem_cache_free(file_slab, f); | |
289 | } | |
290 | ||
13cd2184 N |
291 | static inline void |
292 | put_nfs4_file(struct nfs4_file *fi) | |
293 | { | |
02e1215f JL |
294 | might_lock(&state_lock); |
295 | ||
cdc97505 | 296 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 297 | hlist_del(&fi->fi_hash); |
cdc97505 | 298 | spin_unlock(&state_lock); |
32513b40 | 299 | nfsd4_free_file(fi); |
8b671b80 | 300 | } |
13cd2184 N |
301 | } |
302 | ||
303 | static inline void | |
304 | get_nfs4_file(struct nfs4_file *fi) | |
305 | { | |
8b671b80 | 306 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
307 | } |
308 | ||
de18643d TM |
309 | static struct file * |
310 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
311 | { | |
312 | if (f->fi_fds[oflag]) | |
313 | return get_file(f->fi_fds[oflag]); | |
314 | return NULL; | |
315 | } | |
316 | ||
317 | static struct file * | |
318 | find_writeable_file_locked(struct nfs4_file *f) | |
319 | { | |
320 | struct file *ret; | |
321 | ||
322 | lockdep_assert_held(&f->fi_lock); | |
323 | ||
324 | ret = __nfs4_get_fd(f, O_WRONLY); | |
325 | if (!ret) | |
326 | ret = __nfs4_get_fd(f, O_RDWR); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | static struct file * | |
331 | find_writeable_file(struct nfs4_file *f) | |
332 | { | |
333 | struct file *ret; | |
334 | ||
335 | spin_lock(&f->fi_lock); | |
336 | ret = find_writeable_file_locked(f); | |
337 | spin_unlock(&f->fi_lock); | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
342 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
343 | { | |
344 | struct file *ret; | |
345 | ||
346 | lockdep_assert_held(&f->fi_lock); | |
347 | ||
348 | ret = __nfs4_get_fd(f, O_RDONLY); | |
349 | if (!ret) | |
350 | ret = __nfs4_get_fd(f, O_RDWR); | |
351 | return ret; | |
352 | } | |
353 | ||
354 | static struct file * | |
355 | find_readable_file(struct nfs4_file *f) | |
356 | { | |
357 | struct file *ret; | |
358 | ||
359 | spin_lock(&f->fi_lock); | |
360 | ret = find_readable_file_locked(f); | |
361 | spin_unlock(&f->fi_lock); | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | static struct file * | |
367 | find_any_file(struct nfs4_file *f) | |
368 | { | |
369 | struct file *ret; | |
370 | ||
371 | spin_lock(&f->fi_lock); | |
372 | ret = __nfs4_get_fd(f, O_RDWR); | |
373 | if (!ret) { | |
374 | ret = __nfs4_get_fd(f, O_WRONLY); | |
375 | if (!ret) | |
376 | ret = __nfs4_get_fd(f, O_RDONLY); | |
377 | } | |
378 | spin_unlock(&f->fi_lock); | |
379 | return ret; | |
380 | } | |
381 | ||
02a3508d | 382 | static atomic_long_t num_delegations; |
697ce9be | 383 | unsigned long max_delegations; |
ef0f3390 N |
384 | |
385 | /* | |
386 | * Open owner state (share locks) | |
387 | */ | |
388 | ||
16bfdaaf BF |
389 | /* hash tables for lock and open owners */ |
390 | #define OWNER_HASH_BITS 8 | |
391 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
392 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 393 | |
d4f0489f | 394 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
395 | { |
396 | unsigned int ret; | |
397 | ||
398 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 399 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 400 | } |
ef0f3390 | 401 | |
ef0f3390 N |
402 | /* hash table for nfs4_file */ |
403 | #define FILE_HASH_BITS 8 | |
404 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 405 | |
ca943217 | 406 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 407 | { |
ca943217 TM |
408 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
409 | } | |
410 | ||
411 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
412 | { | |
413 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
414 | } | |
415 | ||
416 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
417 | { | |
418 | return fh1->fh_size == fh2->fh_size && | |
419 | !memcmp(fh1->fh_base.fh_pad, | |
420 | fh2->fh_base.fh_pad, | |
421 | fh1->fh_size); | |
ddc04c41 BF |
422 | } |
423 | ||
89876f8c | 424 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 425 | |
12659651 JL |
426 | static void |
427 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 428 | { |
7214e860 JL |
429 | lockdep_assert_held(&fp->fi_lock); |
430 | ||
12659651 JL |
431 | if (access & NFS4_SHARE_ACCESS_WRITE) |
432 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
433 | if (access & NFS4_SHARE_ACCESS_READ) | |
434 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
435 | } |
436 | ||
12659651 JL |
437 | static __be32 |
438 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 439 | { |
7214e860 JL |
440 | lockdep_assert_held(&fp->fi_lock); |
441 | ||
12659651 JL |
442 | /* Does this access mode make sense? */ |
443 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
444 | return nfserr_inval; | |
445 | ||
baeb4ff0 JL |
446 | /* Does it conflict with a deny mode already set? */ |
447 | if ((access & fp->fi_share_deny) != 0) | |
448 | return nfserr_share_denied; | |
449 | ||
12659651 JL |
450 | __nfs4_file_get_access(fp, access); |
451 | return nfs_ok; | |
998db52c BF |
452 | } |
453 | ||
baeb4ff0 JL |
454 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
455 | { | |
456 | /* Common case is that there is no deny mode. */ | |
457 | if (deny) { | |
458 | /* Does this deny mode make sense? */ | |
459 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
460 | return nfserr_inval; | |
461 | ||
462 | if ((deny & NFS4_SHARE_DENY_READ) && | |
463 | atomic_read(&fp->fi_access[O_RDONLY])) | |
464 | return nfserr_share_denied; | |
465 | ||
466 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
467 | atomic_read(&fp->fi_access[O_WRONLY])) | |
468 | return nfserr_share_denied; | |
469 | } | |
470 | return nfs_ok; | |
471 | } | |
472 | ||
998db52c | 473 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 474 | { |
de18643d TM |
475 | might_lock(&fp->fi_lock); |
476 | ||
477 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
478 | struct file *f1 = NULL; | |
479 | struct file *f2 = NULL; | |
480 | ||
6d338b51 | 481 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 482 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 483 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
484 | spin_unlock(&fp->fi_lock); |
485 | if (f1) | |
486 | fput(f1); | |
487 | if (f2) | |
488 | fput(f2); | |
f9d7562f BF |
489 | } |
490 | } | |
491 | ||
12659651 | 492 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 493 | { |
12659651 JL |
494 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
495 | ||
496 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 497 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
498 | if (access & NFS4_SHARE_ACCESS_READ) |
499 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
500 | } |
501 | ||
6011695d TM |
502 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
503 | struct kmem_cache *slab) | |
2a74aba7 | 504 | { |
3abdb607 | 505 | struct nfs4_stid *stid; |
6136d2b4 | 506 | int new_id; |
2a74aba7 | 507 | |
f8338834 | 508 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
509 | if (!stid) |
510 | return NULL; | |
511 | ||
4770d722 JL |
512 | idr_preload(GFP_KERNEL); |
513 | spin_lock(&cl->cl_lock); | |
514 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
515 | spin_unlock(&cl->cl_lock); | |
516 | idr_preload_end(); | |
ebd6c707 | 517 | if (new_id < 0) |
3abdb607 | 518 | goto out_free; |
2a74aba7 | 519 | stid->sc_client = cl; |
3abdb607 BF |
520 | stid->sc_stateid.si_opaque.so_id = new_id; |
521 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 522 | /* Will be incremented before return to client: */ |
72c0b0fb | 523 | atomic_set(&stid->sc_count, 1); |
996e0938 | 524 | |
996e0938 | 525 | /* |
3abdb607 BF |
526 | * It shouldn't be a problem to reuse an opaque stateid value. |
527 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
528 | * example, a stray write retransmission could be accepted by | |
529 | * the server when it should have been rejected. Therefore, | |
530 | * adopt a trick from the sctp code to attempt to maximize the | |
531 | * amount of time until an id is reused, by ensuring they always | |
532 | * "increase" (mod INT_MAX): | |
996e0938 | 533 | */ |
3abdb607 BF |
534 | return stid; |
535 | out_free: | |
2c44a234 | 536 | kmem_cache_free(slab, stid); |
3abdb607 | 537 | return NULL; |
2a74aba7 BF |
538 | } |
539 | ||
b49e084d | 540 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 541 | { |
6011695d TM |
542 | struct nfs4_stid *stid; |
543 | struct nfs4_ol_stateid *stp; | |
544 | ||
545 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
546 | if (!stid) | |
547 | return NULL; | |
548 | ||
549 | stp = openlockstateid(stid); | |
550 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
551 | return stp; | |
552 | } | |
553 | ||
554 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
555 | { | |
6011695d TM |
556 | kmem_cache_free(deleg_slab, stid); |
557 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
558 | } |
559 | ||
6282cd56 N |
560 | /* |
561 | * When we recall a delegation, we should be careful not to hand it | |
562 | * out again straight away. | |
563 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
564 | * in which the filehandles of recalled delegations are "stored". | |
565 | * If a filehandle appear in either filter, a delegation is blocked. | |
566 | * When a delegation is recalled, the filehandle is stored in the "new" | |
567 | * filter. | |
568 | * Every 30 seconds we swap the filters and clear the "new" one, | |
569 | * unless both are empty of course. | |
570 | * | |
571 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
572 | * low 3 bytes as hash-table indices. | |
573 | * | |
f54fe962 | 574 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
575 | * is used to manage concurrent access. Testing does not need the lock |
576 | * except when swapping the two filters. | |
577 | */ | |
f54fe962 | 578 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
579 | static struct bloom_pair { |
580 | int entries, old_entries; | |
581 | time_t swap_time; | |
582 | int new; /* index into 'set' */ | |
583 | DECLARE_BITMAP(set[2], 256); | |
584 | } blocked_delegations; | |
585 | ||
586 | static int delegation_blocked(struct knfsd_fh *fh) | |
587 | { | |
588 | u32 hash; | |
589 | struct bloom_pair *bd = &blocked_delegations; | |
590 | ||
591 | if (bd->entries == 0) | |
592 | return 0; | |
593 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 594 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
595 | if (seconds_since_boot() - bd->swap_time > 30) { |
596 | bd->entries -= bd->old_entries; | |
597 | bd->old_entries = bd->entries; | |
598 | memset(bd->set[bd->new], 0, | |
599 | sizeof(bd->set[0])); | |
600 | bd->new = 1-bd->new; | |
601 | bd->swap_time = seconds_since_boot(); | |
602 | } | |
f54fe962 | 603 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
604 | } |
605 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
606 | if (test_bit(hash&255, bd->set[0]) && | |
607 | test_bit((hash>>8)&255, bd->set[0]) && | |
608 | test_bit((hash>>16)&255, bd->set[0])) | |
609 | return 1; | |
610 | ||
611 | if (test_bit(hash&255, bd->set[1]) && | |
612 | test_bit((hash>>8)&255, bd->set[1]) && | |
613 | test_bit((hash>>16)&255, bd->set[1])) | |
614 | return 1; | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | static void block_delegations(struct knfsd_fh *fh) | |
620 | { | |
621 | u32 hash; | |
622 | struct bloom_pair *bd = &blocked_delegations; | |
623 | ||
624 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
625 | ||
f54fe962 | 626 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
627 | __set_bit(hash&255, bd->set[bd->new]); |
628 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
629 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
630 | if (bd->entries == 0) | |
631 | bd->swap_time = seconds_since_boot(); | |
632 | bd->entries += 1; | |
f54fe962 | 633 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
634 | } |
635 | ||
1da177e4 | 636 | static struct nfs4_delegation * |
f9416e28 | 637 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
638 | { |
639 | struct nfs4_delegation *dp; | |
02a3508d | 640 | long n; |
1da177e4 LT |
641 | |
642 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
643 | n = atomic_long_inc_return(&num_delegations); |
644 | if (n < 0 || n > max_delegations) | |
645 | goto out_dec; | |
6282cd56 | 646 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 647 | goto out_dec; |
996e0938 | 648 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 649 | if (dp == NULL) |
02a3508d | 650 | goto out_dec; |
6011695d TM |
651 | |
652 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
653 | /* |
654 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
655 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
656 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
657 | */ |
658 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
659 | INIT_LIST_HEAD(&dp->dl_perfile); |
660 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 661 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 662 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 663 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 664 | return dp; |
02a3508d TM |
665 | out_dec: |
666 | atomic_long_dec(&num_delegations); | |
667 | return NULL; | |
1da177e4 LT |
668 | } |
669 | ||
670 | void | |
6011695d | 671 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 672 | { |
11b9164a | 673 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
674 | struct nfs4_client *clp = s->sc_client; |
675 | ||
4770d722 JL |
676 | might_lock(&clp->cl_lock); |
677 | ||
b401be22 JL |
678 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
679 | wake_up_all(&close_wq); | |
6011695d | 680 | return; |
b401be22 | 681 | } |
6011695d | 682 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 683 | spin_unlock(&clp->cl_lock); |
6011695d | 684 | s->sc_free(s); |
11b9164a TM |
685 | if (fp) |
686 | put_nfs4_file(fp); | |
1da177e4 LT |
687 | } |
688 | ||
acfdf5c3 | 689 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 690 | { |
417c6629 JL |
691 | lockdep_assert_held(&state_lock); |
692 | ||
cbf7a75b BF |
693 | if (!fp->fi_lease) |
694 | return; | |
acfdf5c3 BF |
695 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
696 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
697 | fp->fi_lease = NULL; | |
4ee63624 | 698 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
699 | fp->fi_deleg_file = NULL; |
700 | } | |
1da177e4 LT |
701 | } |
702 | ||
6136d2b4 BF |
703 | static void unhash_stid(struct nfs4_stid *s) |
704 | { | |
3abdb607 | 705 | s->sc_type = 0; |
6136d2b4 BF |
706 | } |
707 | ||
931ee56c BH |
708 | static void |
709 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
710 | { | |
cdc97505 | 711 | lockdep_assert_held(&state_lock); |
417c6629 | 712 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 713 | |
67cb1279 | 714 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 715 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
716 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
717 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
718 | } | |
719 | ||
1da177e4 | 720 | static void |
42690676 | 721 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 722 | { |
11b9164a | 723 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 724 | |
42690676 JL |
725 | lockdep_assert_held(&state_lock); |
726 | ||
b0fc29d6 | 727 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
728 | /* Ensure that deleg break won't try to requeue it */ |
729 | ++dp->dl_time; | |
417c6629 | 730 | spin_lock(&fp->fi_lock); |
931ee56c | 731 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 732 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
733 | list_del_init(&dp->dl_perfile); |
734 | spin_unlock(&fp->fi_lock); | |
f8338834 | 735 | if (fp) |
02e1215f | 736 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
737 | } |
738 | ||
3bd64a5b BF |
739 | static void destroy_delegation(struct nfs4_delegation *dp) |
740 | { | |
42690676 JL |
741 | spin_lock(&state_lock); |
742 | unhash_delegation_locked(dp); | |
743 | spin_unlock(&state_lock); | |
6011695d | 744 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
745 | } |
746 | ||
747 | static void revoke_delegation(struct nfs4_delegation *dp) | |
748 | { | |
749 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
750 | ||
2d4a532d JL |
751 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
752 | ||
3bd64a5b | 753 | if (clp->cl_minorversion == 0) |
6011695d | 754 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 755 | else { |
3bd64a5b | 756 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
757 | spin_lock(&clp->cl_lock); |
758 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
759 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
760 | } |
761 | } | |
762 | ||
1da177e4 LT |
763 | /* |
764 | * SETCLIENTID state | |
765 | */ | |
766 | ||
ddc04c41 BF |
767 | static unsigned int clientid_hashval(u32 id) |
768 | { | |
769 | return id & CLIENT_HASH_MASK; | |
770 | } | |
771 | ||
772 | static unsigned int clientstr_hashval(const char *name) | |
773 | { | |
774 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
775 | } | |
776 | ||
f9d7562f BF |
777 | /* |
778 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
779 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
780 | * only what share bits are currently in force, but also what | |
781 | * combinations of share bits previous opens have used. This allows us | |
782 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
783 | * return an error if the client attempt to downgrade to a combination | |
784 | * of share bits not explicable by closing some of its previous opens. | |
785 | * | |
786 | * XXX: This enforcement is actually incomplete, since we don't keep | |
787 | * track of access/deny bit combinations; so, e.g., we allow: | |
788 | * | |
789 | * OPEN allow read, deny write | |
790 | * OPEN allow both, deny none | |
791 | * DOWNGRADE allow read, deny none | |
792 | * | |
793 | * which we should reject. | |
794 | */ | |
5ae037e5 JL |
795 | static unsigned int |
796 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 797 | int i; |
5ae037e5 | 798 | unsigned int access = 0; |
f9d7562f | 799 | |
f9d7562f BF |
800 | for (i = 1; i < 4; i++) { |
801 | if (test_bit(i, &bmap)) | |
5ae037e5 | 802 | access |= i; |
f9d7562f | 803 | } |
5ae037e5 | 804 | return access; |
f9d7562f BF |
805 | } |
806 | ||
82c5ff1b JL |
807 | /* set share access for a given stateid */ |
808 | static inline void | |
809 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
810 | { | |
c11c591f JL |
811 | unsigned char mask = 1 << access; |
812 | ||
813 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
814 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
815 | } |
816 | ||
817 | /* clear share access for a given stateid */ | |
818 | static inline void | |
819 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
820 | { | |
c11c591f JL |
821 | unsigned char mask = 1 << access; |
822 | ||
823 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
824 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
825 | } |
826 | ||
827 | /* test whether a given stateid has access */ | |
828 | static inline bool | |
829 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
830 | { | |
c11c591f JL |
831 | unsigned char mask = 1 << access; |
832 | ||
833 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
834 | } |
835 | ||
ce0fc43c JL |
836 | /* set share deny for a given stateid */ |
837 | static inline void | |
c11c591f | 838 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 839 | { |
c11c591f JL |
840 | unsigned char mask = 1 << deny; |
841 | ||
842 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
843 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
844 | } |
845 | ||
846 | /* clear share deny for a given stateid */ | |
847 | static inline void | |
c11c591f | 848 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 849 | { |
c11c591f JL |
850 | unsigned char mask = 1 << deny; |
851 | ||
852 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
853 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
854 | } |
855 | ||
856 | /* test whether a given stateid is denying specific access */ | |
857 | static inline bool | |
c11c591f | 858 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 859 | { |
c11c591f JL |
860 | unsigned char mask = 1 << deny; |
861 | ||
862 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
863 | } |
864 | ||
865 | static int nfs4_access_to_omode(u32 access) | |
866 | { | |
8f34a430 | 867 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
868 | case NFS4_SHARE_ACCESS_READ: |
869 | return O_RDONLY; | |
870 | case NFS4_SHARE_ACCESS_WRITE: | |
871 | return O_WRONLY; | |
872 | case NFS4_SHARE_ACCESS_BOTH: | |
873 | return O_RDWR; | |
874 | } | |
063b0fb9 BF |
875 | WARN_ON_ONCE(1); |
876 | return O_RDONLY; | |
f9d7562f BF |
877 | } |
878 | ||
baeb4ff0 JL |
879 | /* |
880 | * A stateid that had a deny mode associated with it is being released | |
881 | * or downgraded. Recalculate the deny mode on the file. | |
882 | */ | |
883 | static void | |
884 | recalculate_deny_mode(struct nfs4_file *fp) | |
885 | { | |
886 | struct nfs4_ol_stateid *stp; | |
887 | ||
888 | spin_lock(&fp->fi_lock); | |
889 | fp->fi_share_deny = 0; | |
890 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
891 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
892 | spin_unlock(&fp->fi_lock); | |
893 | } | |
894 | ||
895 | static void | |
896 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
897 | { | |
898 | int i; | |
899 | bool change = false; | |
900 | ||
901 | for (i = 1; i < 4; i++) { | |
902 | if ((i & deny) != i) { | |
903 | change = true; | |
904 | clear_deny(i, stp); | |
905 | } | |
906 | } | |
907 | ||
908 | /* Recalculate per-file deny mode if there was a change */ | |
909 | if (change) | |
11b9164a | 910 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
911 | } |
912 | ||
82c5ff1b JL |
913 | /* release all access and file references for a given stateid */ |
914 | static void | |
915 | release_all_access(struct nfs4_ol_stateid *stp) | |
916 | { | |
917 | int i; | |
11b9164a | 918 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
919 | |
920 | if (fp && stp->st_deny_bmap != 0) | |
921 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
922 | |
923 | for (i = 1; i < 4; i++) { | |
924 | if (test_access(i, stp)) | |
11b9164a | 925 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
926 | clear_access(i, stp); |
927 | } | |
928 | } | |
929 | ||
6b180f0b JL |
930 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
931 | { | |
a819ecc1 JL |
932 | struct nfs4_client *clp = sop->so_client; |
933 | ||
934 | might_lock(&clp->cl_lock); | |
935 | ||
936 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 937 | return; |
8f4b54c5 | 938 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 939 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
940 | kfree(sop->so_owner.data); |
941 | sop->so_ops->so_free(sop); | |
942 | } | |
943 | ||
4ae098d3 | 944 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 945 | { |
11b9164a | 946 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 947 | |
1c755dc1 JL |
948 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
949 | ||
1d31a253 | 950 | spin_lock(&fp->fi_lock); |
529d7b2a | 951 | list_del(&stp->st_perfile); |
1d31a253 | 952 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
953 | list_del(&stp->st_perstateowner); |
954 | } | |
955 | ||
6011695d | 956 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 957 | { |
6011695d | 958 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 959 | |
6011695d | 960 | release_all_access(stp); |
d3134b10 JL |
961 | if (stp->st_stateowner) |
962 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 963 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
964 | } |
965 | ||
b49e084d | 966 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 967 | { |
b49e084d JL |
968 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
969 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
970 | struct file *file; |
971 | ||
b49e084d JL |
972 | file = find_any_file(stp->st_stid.sc_file); |
973 | if (file) | |
974 | filp_close(file, (fl_owner_t)lo); | |
975 | nfs4_free_ol_stateid(stid); | |
976 | } | |
977 | ||
2c41beb0 JL |
978 | /* |
979 | * Put the persistent reference to an already unhashed generic stateid, while | |
980 | * holding the cl_lock. If it's the last reference, then put it onto the | |
981 | * reaplist for later destruction. | |
982 | */ | |
983 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
984 | struct list_head *reaplist) | |
985 | { | |
986 | struct nfs4_stid *s = &stp->st_stid; | |
987 | struct nfs4_client *clp = s->sc_client; | |
988 | ||
989 | lockdep_assert_held(&clp->cl_lock); | |
990 | ||
991 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
992 | ||
993 | if (!atomic_dec_and_test(&s->sc_count)) { | |
994 | wake_up_all(&close_wq); | |
995 | return; | |
996 | } | |
997 | ||
998 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
999 | list_add(&stp->st_locks, reaplist); | |
1000 | } | |
1001 | ||
3c1c995c | 1002 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1003 | { |
1c755dc1 JL |
1004 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
1005 | ||
3c1c995c JL |
1006 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
1007 | ||
1008 | list_del_init(&stp->st_locks); | |
4ae098d3 | 1009 | unhash_ol_stateid(stp); |
6136d2b4 | 1010 | unhash_stid(&stp->st_stid); |
3c1c995c JL |
1011 | } |
1012 | ||
1013 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1014 | { | |
1015 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1016 | ||
1017 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1018 | unhash_lock_stateid(stp); | |
1c755dc1 | 1019 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1020 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1021 | } |
1022 | ||
c58c6610 | 1023 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1024 | { |
d4f0489f | 1025 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1026 | |
d4f0489f | 1027 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1028 | |
8f4b54c5 JL |
1029 | list_del_init(&lo->lo_owner.so_strhash); |
1030 | } | |
1031 | ||
2c41beb0 JL |
1032 | /* |
1033 | * Free a list of generic stateids that were collected earlier after being | |
1034 | * fully unhashed. | |
1035 | */ | |
1036 | static void | |
1037 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1038 | { | |
1039 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1040 | struct nfs4_file *fp; |
2c41beb0 JL |
1041 | |
1042 | might_sleep(); | |
1043 | ||
1044 | while (!list_empty(reaplist)) { | |
1045 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1046 | st_locks); | |
1047 | list_del(&stp->st_locks); | |
fb94d766 | 1048 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1049 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1050 | if (fp) |
1051 | put_nfs4_file(fp); | |
2c41beb0 JL |
1052 | } |
1053 | } | |
1054 | ||
3c1c995c | 1055 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1056 | { |
d4f0489f | 1057 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1058 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1059 | struct list_head reaplist; |
529d7b2a | 1060 | |
3c1c995c | 1061 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1062 | |
3c1c995c JL |
1063 | spin_lock(&clp->cl_lock); |
1064 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1065 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1066 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1067 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1068 | unhash_lock_stateid(stp); |
2c41beb0 | 1069 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1070 | } |
d4f0489f | 1071 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1072 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1073 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1074 | } |
1075 | ||
d83017f9 JL |
1076 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1077 | struct list_head *reaplist) | |
3c87b9b7 TM |
1078 | { |
1079 | struct nfs4_ol_stateid *stp; | |
1080 | ||
1081 | while (!list_empty(&open_stp->st_locks)) { | |
1082 | stp = list_entry(open_stp->st_locks.next, | |
1083 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1084 | unhash_lock_stateid(stp); |
1085 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1086 | } |
1087 | } | |
1088 | ||
d83017f9 JL |
1089 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1090 | struct list_head *reaplist) | |
2283963f | 1091 | { |
2c41beb0 JL |
1092 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1093 | ||
4ae098d3 | 1094 | unhash_ol_stateid(stp); |
d83017f9 | 1095 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1096 | } |
1097 | ||
1098 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1099 | { | |
2c41beb0 JL |
1100 | LIST_HEAD(reaplist); |
1101 | ||
1102 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1103 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1104 | put_ol_stateid_locked(stp, &reaplist); |
1105 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1106 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1107 | } |
1108 | ||
7ffb5880 | 1109 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1110 | { |
d4f0489f | 1111 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1112 | |
d4f0489f | 1113 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1114 | |
8f4b54c5 JL |
1115 | list_del_init(&oo->oo_owner.so_strhash); |
1116 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1117 | } |
1118 | ||
f7a4d872 BF |
1119 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1120 | { | |
217526e7 JL |
1121 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1122 | nfsd_net_id); | |
1123 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1124 | |
217526e7 JL |
1125 | spin_lock(&nn->client_lock); |
1126 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1127 | if (s) { |
d3134b10 | 1128 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1129 | oo->oo_last_closed_stid = NULL; |
1130 | } | |
217526e7 JL |
1131 | spin_unlock(&nn->client_lock); |
1132 | if (s) | |
1133 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1134 | } |
1135 | ||
2c41beb0 | 1136 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1137 | { |
1138 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1139 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1140 | struct list_head reaplist; |
7ffb5880 | 1141 | |
2c41beb0 | 1142 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1143 | |
2c41beb0 JL |
1144 | spin_lock(&clp->cl_lock); |
1145 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1146 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1147 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1148 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1149 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1150 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1151 | } |
d4f0489f | 1152 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1153 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1154 | release_last_closed_stateid(oo); |
6b180f0b | 1155 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1156 | } |
1157 | ||
5282fd72 ME |
1158 | static inline int |
1159 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1160 | { | |
1161 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1162 | ||
1163 | return sid->sequence % SESSION_HASH_SIZE; | |
1164 | } | |
1165 | ||
8f199b82 | 1166 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1167 | static inline void |
1168 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1169 | { | |
1170 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1171 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1172 | } | |
8f199b82 TM |
1173 | #else |
1174 | static inline void | |
1175 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1176 | { | |
1177 | } | |
1178 | #endif | |
1179 | ||
9411b1d4 BF |
1180 | /* |
1181 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1182 | * won't be used for replay. | |
1183 | */ | |
1184 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1185 | { | |
1186 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1187 | ||
1188 | if (nfserr == nfserr_replay_me) | |
1189 | return; | |
1190 | ||
1191 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1192 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1193 | return; |
1194 | } | |
1195 | if (!so) | |
1196 | return; | |
1197 | if (so->so_is_open_owner) | |
1198 | release_last_closed_stateid(openowner(so)); | |
1199 | so->so_seqid++; | |
1200 | return; | |
1201 | } | |
5282fd72 | 1202 | |
ec6b5d7b AA |
1203 | static void |
1204 | gen_sessionid(struct nfsd4_session *ses) | |
1205 | { | |
1206 | struct nfs4_client *clp = ses->se_client; | |
1207 | struct nfsd4_sessionid *sid; | |
1208 | ||
1209 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1210 | sid->clientid = clp->cl_clientid; | |
1211 | sid->sequence = current_sessionid++; | |
1212 | sid->reserved = 0; | |
1213 | } | |
1214 | ||
1215 | /* | |
a649637c AA |
1216 | * The protocol defines ca_maxresponssize_cached to include the size of |
1217 | * the rpc header, but all we need to cache is the data starting after | |
1218 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1219 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1220 | * value that is the number of bytes in our cache plus a few additional | |
1221 | * bytes. In order to stay on the safe side, and not promise more than | |
1222 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1223 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1224 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1225 | * for the SEQUENCE op response: | |
1226 | */ | |
1227 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1228 | ||
557ce264 AA |
1229 | static void |
1230 | free_session_slots(struct nfsd4_session *ses) | |
1231 | { | |
1232 | int i; | |
1233 | ||
1234 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1235 | kfree(ses->se_slots[i]); | |
1236 | } | |
1237 | ||
a649637c | 1238 | /* |
efe0cb6d BF |
1239 | * We don't actually need to cache the rpc and session headers, so we |
1240 | * can allocate a little less for each slot: | |
1241 | */ | |
55c760cf | 1242 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1243 | { |
55c760cf | 1244 | u32 size; |
efe0cb6d | 1245 | |
55c760cf BF |
1246 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1247 | size = 0; | |
1248 | else | |
1249 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1250 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1251 | } |
ec6b5d7b | 1252 | |
5b6feee9 BF |
1253 | /* |
1254 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1255 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1256 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1257 | */ |
55c760cf | 1258 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1259 | { |
55c760cf BF |
1260 | u32 slotsize = slot_bytes(ca); |
1261 | u32 num = ca->maxreqs; | |
5b6feee9 | 1262 | int avail; |
ec6b5d7b | 1263 | |
5b6feee9 | 1264 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1265 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1266 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1267 | num = min_t(int, num, avail / slotsize); |
1268 | nfsd_drc_mem_used += num * slotsize; | |
1269 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1270 | |
5b6feee9 BF |
1271 | return num; |
1272 | } | |
ec6b5d7b | 1273 | |
55c760cf | 1274 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1275 | { |
55c760cf BF |
1276 | int slotsize = slot_bytes(ca); |
1277 | ||
4bd9b0f4 | 1278 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1279 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1280 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1281 | } |
ec6b5d7b | 1282 | |
60810e54 KM |
1283 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1284 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1285 | { |
60810e54 KM |
1286 | int numslots = fattrs->maxreqs; |
1287 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1288 | struct nfsd4_session *new; |
1289 | int mem, i; | |
a649637c | 1290 | |
5b6feee9 BF |
1291 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1292 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1293 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1294 | |
5b6feee9 BF |
1295 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1296 | if (!new) | |
1297 | return NULL; | |
557ce264 | 1298 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1299 | for (i = 0; i < numslots; i++) { |
55c760cf | 1300 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1301 | if (!new->se_slots[i]) |
557ce264 | 1302 | goto out_free; |
557ce264 | 1303 | } |
60810e54 KM |
1304 | |
1305 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1306 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1307 | ||
5b6feee9 BF |
1308 | return new; |
1309 | out_free: | |
1310 | while (i--) | |
1311 | kfree(new->se_slots[i]); | |
1312 | kfree(new); | |
1313 | return NULL; | |
ec6b5d7b AA |
1314 | } |
1315 | ||
19cf5c02 BF |
1316 | static void free_conn(struct nfsd4_conn *c) |
1317 | { | |
1318 | svc_xprt_put(c->cn_xprt); | |
1319 | kfree(c); | |
1320 | } | |
ec6b5d7b | 1321 | |
19cf5c02 BF |
1322 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1323 | { | |
1324 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1325 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1326 | |
19cf5c02 BF |
1327 | spin_lock(&clp->cl_lock); |
1328 | if (!list_empty(&c->cn_persession)) { | |
1329 | list_del(&c->cn_persession); | |
1330 | free_conn(c); | |
1331 | } | |
eea49806 | 1332 | nfsd4_probe_callback(clp); |
2e4b7239 | 1333 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1334 | } |
ec6b5d7b | 1335 | |
d29c374c | 1336 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1337 | { |
c7662518 | 1338 | struct nfsd4_conn *conn; |
ec6b5d7b | 1339 | |
c7662518 BF |
1340 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1341 | if (!conn) | |
db90681d | 1342 | return NULL; |
c7662518 BF |
1343 | svc_xprt_get(rqstp->rq_xprt); |
1344 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1345 | conn->cn_flags = flags; |
db90681d BF |
1346 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1347 | return conn; | |
1348 | } | |
a649637c | 1349 | |
328ead28 BF |
1350 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1351 | { | |
1352 | conn->cn_session = ses; | |
1353 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1354 | } |
1355 | ||
db90681d | 1356 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1357 | { |
db90681d | 1358 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1359 | |
c7662518 | 1360 | spin_lock(&clp->cl_lock); |
328ead28 | 1361 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1362 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1363 | } |
1364 | ||
21b75b01 | 1365 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1366 | { |
19cf5c02 | 1367 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1368 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1369 | } |
1370 | ||
e1ff371f | 1371 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1372 | { |
21b75b01 | 1373 | int ret; |
ec6b5d7b | 1374 | |
db90681d | 1375 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1376 | ret = nfsd4_register_conn(conn); |
1377 | if (ret) | |
1378 | /* oops; xprt is already down: */ | |
1379 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1380 | /* We may have gained or lost a callback channel: */ |
1381 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1382 | } |
ec6b5d7b | 1383 | |
e1ff371f | 1384 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1385 | { |
1386 | u32 dir = NFS4_CDFC4_FORE; | |
1387 | ||
e1ff371f | 1388 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1389 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1390 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1391 | } |
1392 | ||
1393 | /* must be called under client_lock */ | |
19cf5c02 | 1394 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1395 | { |
19cf5c02 BF |
1396 | struct nfs4_client *clp = s->se_client; |
1397 | struct nfsd4_conn *c; | |
ec6b5d7b | 1398 | |
19cf5c02 BF |
1399 | spin_lock(&clp->cl_lock); |
1400 | while (!list_empty(&s->se_conns)) { | |
1401 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1402 | list_del_init(&c->cn_persession); | |
1403 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1404 | |
19cf5c02 BF |
1405 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1406 | free_conn(c); | |
ec6b5d7b | 1407 | |
19cf5c02 BF |
1408 | spin_lock(&clp->cl_lock); |
1409 | } | |
1410 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1411 | } |
ec6b5d7b | 1412 | |
1377b69e BF |
1413 | static void __free_session(struct nfsd4_session *ses) |
1414 | { | |
1377b69e BF |
1415 | free_session_slots(ses); |
1416 | kfree(ses); | |
1417 | } | |
1418 | ||
66b2b9b2 | 1419 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1420 | { |
19cf5c02 | 1421 | nfsd4_del_conns(ses); |
55c760cf | 1422 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1423 | __free_session(ses); |
c7662518 BF |
1424 | } |
1425 | ||
135ae827 | 1426 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1427 | { |
a827bcb2 | 1428 | int idx; |
1872de0e | 1429 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1430 | |
ec6b5d7b AA |
1431 | new->se_client = clp; |
1432 | gen_sessionid(new); | |
ec6b5d7b | 1433 | |
c7662518 BF |
1434 | INIT_LIST_HEAD(&new->se_conns); |
1435 | ||
ac7c46f2 | 1436 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1437 | new->se_flags = cses->flags; |
8b5ce5cd | 1438 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1439 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1440 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1441 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1442 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1443 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1444 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1445 | spin_unlock(&clp->cl_lock); |
60810e54 | 1446 | |
dcbeaa68 | 1447 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1448 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1449 | /* |
1450 | * This is a little silly; with sessions there's no real | |
1451 | * use for the callback address. Use the peer address | |
1452 | * as a reasonable default for now, but consider fixing | |
1453 | * the rpc client not to require an address in the | |
1454 | * future: | |
1455 | */ | |
edd76786 BF |
1456 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1457 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1458 | } |
ec6b5d7b AA |
1459 | } |
1460 | ||
9089f1b4 | 1461 | /* caller must hold client_lock */ |
5282fd72 | 1462 | static struct nfsd4_session * |
d4e19e70 | 1463 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1464 | { |
1465 | struct nfsd4_session *elem; | |
1466 | int idx; | |
1872de0e | 1467 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1468 | |
0a880a28 TM |
1469 | lockdep_assert_held(&nn->client_lock); |
1470 | ||
5282fd72 ME |
1471 | dump_sessionid(__func__, sessionid); |
1472 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1473 | /* Search in the appropriate list */ |
1872de0e | 1474 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1475 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1476 | NFS4_MAX_SESSIONID_LEN)) { | |
1477 | return elem; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | dprintk("%s: session not found\n", __func__); | |
1482 | return NULL; | |
1483 | } | |
1484 | ||
d4e19e70 TM |
1485 | static struct nfsd4_session * |
1486 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1487 | __be32 *ret) | |
1488 | { | |
1489 | struct nfsd4_session *session; | |
1490 | __be32 status = nfserr_badsession; | |
1491 | ||
1492 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1493 | if (!session) | |
1494 | goto out; | |
1495 | status = nfsd4_get_session_locked(session); | |
1496 | if (status) | |
1497 | session = NULL; | |
1498 | out: | |
1499 | *ret = status; | |
1500 | return session; | |
1501 | } | |
1502 | ||
9089f1b4 | 1503 | /* caller must hold client_lock */ |
7116ed6b | 1504 | static void |
5282fd72 | 1505 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1506 | { |
0a880a28 TM |
1507 | struct nfs4_client *clp = ses->se_client; |
1508 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1509 | ||
1510 | lockdep_assert_held(&nn->client_lock); | |
1511 | ||
7116ed6b | 1512 | list_del(&ses->se_hash); |
4c649378 | 1513 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1514 | list_del(&ses->se_perclnt); |
4c649378 | 1515 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1516 | } |
1517 | ||
1da177e4 LT |
1518 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1519 | static int | |
2c142baa | 1520 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1521 | { |
2c142baa | 1522 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1523 | return 0; |
60adfc50 | 1524 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1525 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1526 | return 1; |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * XXX Should we use a slab cache ? | |
1531 | * This type of memory management is somewhat inefficient, but we use it | |
1532 | * anyway since SETCLIENTID is not a common operation. | |
1533 | */ | |
35bba9a3 | 1534 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1535 | { |
1536 | struct nfs4_client *clp; | |
d4f0489f | 1537 | int i; |
1da177e4 | 1538 | |
35bba9a3 BF |
1539 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1540 | if (clp == NULL) | |
1541 | return NULL; | |
67114fe6 | 1542 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1543 | if (clp->cl_name.data == NULL) |
1544 | goto err_no_name; | |
1545 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1546 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1547 | if (!clp->cl_ownerstr_hashtbl) | |
1548 | goto err_no_hashtbl; | |
1549 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1550 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1551 | clp->cl_name.len = name.len; |
5694c93e TM |
1552 | INIT_LIST_HEAD(&clp->cl_sessions); |
1553 | idr_init(&clp->cl_stateids); | |
1554 | atomic_set(&clp->cl_refcount, 0); | |
1555 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1556 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1557 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1558 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1559 | INIT_LIST_HEAD(&clp->cl_lru); | |
1560 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1561 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1562 | spin_lock_init(&clp->cl_lock); | |
1563 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1564 | return clp; |
d4f0489f TM |
1565 | err_no_hashtbl: |
1566 | kfree(clp->cl_name.data); | |
1567 | err_no_name: | |
1568 | kfree(clp); | |
1569 | return NULL; | |
1da177e4 LT |
1570 | } |
1571 | ||
4dd86e15 | 1572 | static void |
1da177e4 LT |
1573 | free_client(struct nfs4_client *clp) |
1574 | { | |
792c95dd BF |
1575 | while (!list_empty(&clp->cl_sessions)) { |
1576 | struct nfsd4_session *ses; | |
1577 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1578 | se_perclnt); | |
1579 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1580 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1581 | free_session(ses); | |
792c95dd | 1582 | } |
4cb57e30 | 1583 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1584 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1585 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1586 | kfree(clp->cl_name.data); |
2d32b29a | 1587 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1588 | kfree(clp); |
1589 | } | |
1590 | ||
84d38ac9 | 1591 | /* must be called under the client_lock */ |
4beb345b | 1592 | static void |
84d38ac9 BH |
1593 | unhash_client_locked(struct nfs4_client *clp) |
1594 | { | |
4beb345b | 1595 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1596 | struct nfsd4_session *ses; |
1597 | ||
0a880a28 TM |
1598 | lockdep_assert_held(&nn->client_lock); |
1599 | ||
4beb345b TM |
1600 | /* Mark the client as expired! */ |
1601 | clp->cl_time = 0; | |
1602 | /* Make it invisible */ | |
1603 | if (!list_empty(&clp->cl_idhash)) { | |
1604 | list_del_init(&clp->cl_idhash); | |
1605 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1606 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1607 | else | |
1608 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1609 | } | |
1610 | list_del_init(&clp->cl_lru); | |
4c649378 | 1611 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1612 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1613 | list_del_init(&ses->se_hash); | |
4c649378 | 1614 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1615 | } |
1616 | ||
1da177e4 | 1617 | static void |
4beb345b TM |
1618 | unhash_client(struct nfs4_client *clp) |
1619 | { | |
1620 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1621 | ||
1622 | spin_lock(&nn->client_lock); | |
1623 | unhash_client_locked(clp); | |
1624 | spin_unlock(&nn->client_lock); | |
1625 | } | |
1626 | ||
97403d95 JL |
1627 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1628 | { | |
1629 | if (atomic_read(&clp->cl_refcount)) | |
1630 | return nfserr_jukebox; | |
1631 | unhash_client_locked(clp); | |
1632 | return nfs_ok; | |
1633 | } | |
1634 | ||
4beb345b TM |
1635 | static void |
1636 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1637 | { |
fe0750e5 | 1638 | struct nfs4_openowner *oo; |
1da177e4 | 1639 | struct nfs4_delegation *dp; |
1da177e4 LT |
1640 | struct list_head reaplist; |
1641 | ||
1da177e4 | 1642 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1643 | spin_lock(&state_lock); |
ea1da636 N |
1644 | while (!list_empty(&clp->cl_delegations)) { |
1645 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1646 | unhash_delegation_locked(dp); |
1647 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1648 | } |
cdc97505 | 1649 | spin_unlock(&state_lock); |
1da177e4 LT |
1650 | while (!list_empty(&reaplist)) { |
1651 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1652 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1653 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1654 | } |
2d4a532d | 1655 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1656 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1657 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1658 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1659 | } |
ea1da636 | 1660 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1661 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1662 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1663 | release_openowner(oo); |
1da177e4 | 1664 | } |
6ff8da08 | 1665 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1666 | if (clp->cl_cb_conn.cb_xprt) |
1667 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1668 | free_client(clp); |
1da177e4 LT |
1669 | } |
1670 | ||
4beb345b TM |
1671 | static void |
1672 | destroy_client(struct nfs4_client *clp) | |
1673 | { | |
1674 | unhash_client(clp); | |
1675 | __destroy_client(clp); | |
1676 | } | |
1677 | ||
0d22f68f BF |
1678 | static void expire_client(struct nfs4_client *clp) |
1679 | { | |
4beb345b | 1680 | unhash_client(clp); |
0d22f68f | 1681 | nfsd4_client_record_remove(clp); |
4beb345b | 1682 | __destroy_client(clp); |
0d22f68f BF |
1683 | } |
1684 | ||
35bba9a3 BF |
1685 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1686 | { | |
1687 | memcpy(target->cl_verifier.data, source->data, | |
1688 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1689 | } |
1690 | ||
35bba9a3 BF |
1691 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1692 | { | |
1da177e4 LT |
1693 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1694 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1695 | } | |
1696 | ||
03a4e1f6 | 1697 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1698 | { |
03a4e1f6 BF |
1699 | if (source->cr_principal) { |
1700 | target->cr_principal = | |
1701 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1702 | if (target->cr_principal == NULL) | |
1703 | return -ENOMEM; | |
1704 | } else | |
1705 | target->cr_principal = NULL; | |
d5497fc6 | 1706 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1707 | target->cr_uid = source->cr_uid; |
1708 | target->cr_gid = source->cr_gid; | |
1709 | target->cr_group_info = source->cr_group_info; | |
1710 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1711 | target->cr_gss_mech = source->cr_gss_mech; |
1712 | if (source->cr_gss_mech) | |
1713 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1714 | return 0; |
1da177e4 LT |
1715 | } |
1716 | ||
ac55fdc4 JL |
1717 | static long long |
1718 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1719 | { | |
1720 | long long res; | |
1721 | ||
1722 | res = o1->len - o2->len; | |
1723 | if (res) | |
1724 | return res; | |
1725 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1726 | } | |
1727 | ||
35bba9a3 | 1728 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1729 | { |
a55370a3 | 1730 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1731 | } |
1732 | ||
1733 | static int | |
599e0a22 BF |
1734 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1735 | { | |
1736 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1737 | } |
1738 | ||
1739 | static int | |
599e0a22 BF |
1740 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1741 | { | |
1742 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1743 | } |
1744 | ||
8fbba96e BF |
1745 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1746 | { | |
1747 | int i; | |
1748 | ||
1749 | if (g1->ngroups != g2->ngroups) | |
1750 | return false; | |
1751 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1752 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1753 | return false; |
1754 | return true; | |
1755 | } | |
1756 | ||
68eb3508 BF |
1757 | /* |
1758 | * RFC 3530 language requires clid_inuse be returned when the | |
1759 | * "principal" associated with a requests differs from that previously | |
1760 | * used. We use uid, gid's, and gss principal string as our best | |
1761 | * approximation. We also don't want to allow non-gss use of a client | |
1762 | * established using gss: in theory cr_principal should catch that | |
1763 | * change, but in practice cr_principal can be null even in the gss case | |
1764 | * since gssd doesn't always pass down a principal string. | |
1765 | */ | |
1766 | static bool is_gss_cred(struct svc_cred *cr) | |
1767 | { | |
1768 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1769 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1770 | } | |
1771 | ||
1772 | ||
5559b50a | 1773 | static bool |
599e0a22 BF |
1774 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1775 | { | |
68eb3508 | 1776 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1777 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1778 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1779 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1780 | return false; | |
1781 | if (cr1->cr_principal == cr2->cr_principal) | |
1782 | return true; | |
1783 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1784 | return false; | |
5559b50a | 1785 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1786 | } |
1787 | ||
57266a6e BF |
1788 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1789 | { | |
1790 | struct svc_cred *cr = &rqstp->rq_cred; | |
1791 | u32 service; | |
1792 | ||
c4720591 BF |
1793 | if (!cr->cr_gss_mech) |
1794 | return false; | |
57266a6e BF |
1795 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1796 | return service == RPC_GSS_SVC_INTEGRITY || | |
1797 | service == RPC_GSS_SVC_PRIVACY; | |
1798 | } | |
1799 | ||
1800 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1801 | { | |
1802 | struct svc_cred *cr = &rqstp->rq_cred; | |
1803 | ||
1804 | if (!cl->cl_mach_cred) | |
1805 | return true; | |
1806 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1807 | return false; | |
1808 | if (!svc_rqst_integrity_protected(rqstp)) | |
1809 | return false; | |
1810 | if (!cr->cr_principal) | |
1811 | return false; | |
1812 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1813 | } | |
1814 | ||
c212cecf | 1815 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1816 | { |
1817 | static u32 current_clientid = 1; | |
1818 | ||
2c142baa | 1819 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1820 | clp->cl_clientid.cl_id = current_clientid++; |
1821 | } | |
1822 | ||
deda2faa BF |
1823 | static void gen_confirm(struct nfs4_client *clp) |
1824 | { | |
ab4684d1 | 1825 | __be32 verf[2]; |
deda2faa | 1826 | static u32 i; |
1da177e4 | 1827 | |
f419992c JL |
1828 | /* |
1829 | * This is opaque to client, so no need to byte-swap. Use | |
1830 | * __force to keep sparse happy | |
1831 | */ | |
1832 | verf[0] = (__force __be32)get_seconds(); | |
1833 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1834 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1835 | } |
1836 | ||
4770d722 JL |
1837 | static struct nfs4_stid * |
1838 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1839 | { |
3abdb607 BF |
1840 | struct nfs4_stid *ret; |
1841 | ||
1842 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1843 | if (!ret || !ret->sc_type) | |
1844 | return NULL; | |
1845 | return ret; | |
4d71ab87 BF |
1846 | } |
1847 | ||
4770d722 JL |
1848 | static struct nfs4_stid * |
1849 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1850 | { |
1851 | struct nfs4_stid *s; | |
4d71ab87 | 1852 | |
4770d722 JL |
1853 | spin_lock(&cl->cl_lock); |
1854 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1855 | if (s != NULL) { |
1856 | if (typemask & s->sc_type) | |
1857 | atomic_inc(&s->sc_count); | |
1858 | else | |
1859 | s = NULL; | |
1860 | } | |
4770d722 JL |
1861 | spin_unlock(&cl->cl_lock); |
1862 | return s; | |
4581d140 BF |
1863 | } |
1864 | ||
2216d449 | 1865 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1866 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1867 | { | |
1868 | struct nfs4_client *clp; | |
1869 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1870 | int ret; |
c212cecf | 1871 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1872 | |
1873 | clp = alloc_client(name); | |
1874 | if (clp == NULL) | |
1875 | return NULL; | |
1876 | ||
03a4e1f6 BF |
1877 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1878 | if (ret) { | |
03a4e1f6 | 1879 | free_client(clp); |
03a4e1f6 | 1880 | return NULL; |
b09333c4 | 1881 | } |
02e1215f | 1882 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1883 | clp->cl_time = get_seconds(); |
b09333c4 | 1884 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1885 | copy_verf(clp, verf); |
1886 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1887 | gen_confirm(clp); |
edd76786 | 1888 | clp->cl_cb_session = NULL; |
c212cecf | 1889 | clp->net = net; |
b09333c4 RL |
1890 | return clp; |
1891 | } | |
1892 | ||
fd39ca9a | 1893 | static void |
ac55fdc4 JL |
1894 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1895 | { | |
1896 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1897 | struct nfs4_client *clp; | |
1898 | ||
1899 | while (*new) { | |
1900 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1901 | parent = *new; | |
1902 | ||
1903 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1904 | new = &((*new)->rb_left); | |
1905 | else | |
1906 | new = &((*new)->rb_right); | |
1907 | } | |
1908 | ||
1909 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1910 | rb_insert_color(&new_clp->cl_namenode, root); | |
1911 | } | |
1912 | ||
1913 | static struct nfs4_client * | |
1914 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1915 | { | |
1916 | long long cmp; | |
1917 | struct rb_node *node = root->rb_node; | |
1918 | struct nfs4_client *clp; | |
1919 | ||
1920 | while (node) { | |
1921 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1922 | cmp = compare_blob(&clp->cl_name, name); | |
1923 | if (cmp > 0) | |
1924 | node = node->rb_left; | |
1925 | else if (cmp < 0) | |
1926 | node = node->rb_right; | |
1927 | else | |
1928 | return clp; | |
1929 | } | |
1930 | return NULL; | |
1931 | } | |
1932 | ||
1933 | static void | |
1934 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1935 | { |
1936 | unsigned int idhashval; | |
0a7ec377 | 1937 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1938 | |
0a880a28 TM |
1939 | lockdep_assert_held(&nn->client_lock); |
1940 | ||
ac55fdc4 | 1941 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1942 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1943 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1944 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 1945 | renew_client_locked(clp); |
1da177e4 LT |
1946 | } |
1947 | ||
fd39ca9a | 1948 | static void |
1da177e4 LT |
1949 | move_to_confirmed(struct nfs4_client *clp) |
1950 | { | |
1951 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1952 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1953 | |
0a880a28 TM |
1954 | lockdep_assert_held(&nn->client_lock); |
1955 | ||
1da177e4 | 1956 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 1957 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1958 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1959 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1960 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 1961 | renew_client_locked(clp); |
1da177e4 LT |
1962 | } |
1963 | ||
1964 | static struct nfs4_client * | |
bfa85e83 | 1965 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1966 | { |
1967 | struct nfs4_client *clp; | |
1968 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1969 | ||
bfa85e83 | 1970 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1971 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1972 | if ((bool)clp->cl_minorversion != sessions) |
1973 | return NULL; | |
3dbacee6 | 1974 | renew_client_locked(clp); |
1da177e4 | 1975 | return clp; |
a50d2ad1 | 1976 | } |
1da177e4 LT |
1977 | } |
1978 | return NULL; | |
1979 | } | |
1980 | ||
bfa85e83 BF |
1981 | static struct nfs4_client * |
1982 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1983 | { | |
1984 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1985 | ||
0a880a28 | 1986 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
1987 | return find_client_in_id_table(tbl, clid, sessions); |
1988 | } | |
1989 | ||
1da177e4 | 1990 | static struct nfs4_client * |
0a7ec377 | 1991 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1992 | { |
bfa85e83 | 1993 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1994 | |
0a880a28 | 1995 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 1996 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1997 | } |
1998 | ||
6e5f15c9 | 1999 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2000 | { |
6e5f15c9 | 2001 | return clp->cl_exchange_flags != 0; |
e203d506 | 2002 | } |
a1bcecd2 | 2003 | |
28ce6054 | 2004 | static struct nfs4_client * |
382a62e7 | 2005 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2006 | { |
0a880a28 | 2007 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2008 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2009 | } |
2010 | ||
2011 | static struct nfs4_client * | |
a99454aa | 2012 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2013 | { |
0a880a28 | 2014 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2015 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2016 | } |
2017 | ||
fd39ca9a | 2018 | static void |
6f3d772f | 2019 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2020 | { |
07263f1e | 2021 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2022 | struct sockaddr *sa = svc_addr(rqstp); |
2023 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2024 | unsigned short expected_family; |
2025 | ||
2026 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2027 | if (se->se_callback_netid_len == 3 && | |
2028 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2029 | expected_family = AF_INET; | |
2030 | else if (se->se_callback_netid_len == 4 && | |
2031 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2032 | expected_family = AF_INET6; | |
2033 | else | |
1da177e4 LT |
2034 | goto out_err; |
2035 | ||
c212cecf | 2036 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2037 | se->se_callback_addr_len, |
07263f1e BF |
2038 | (struct sockaddr *)&conn->cb_addr, |
2039 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2040 | |
07263f1e | 2041 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2042 | goto out_err; |
aa9a4ec7 | 2043 | |
07263f1e BF |
2044 | if (conn->cb_addr.ss_family == AF_INET6) |
2045 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2046 | |
07263f1e BF |
2047 | conn->cb_prog = se->se_callback_prog; |
2048 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2049 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2050 | return; |
2051 | out_err: | |
07263f1e BF |
2052 | conn->cb_addr.ss_family = AF_UNSPEC; |
2053 | conn->cb_addrlen = 0; | |
849823c5 | 2054 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2055 | "will not receive delegations\n", |
2056 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2057 | ||
1da177e4 LT |
2058 | return; |
2059 | } | |
2060 | ||
074fe897 | 2061 | /* |
067e1ace | 2062 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2063 | */ |
b607664e | 2064 | static void |
074fe897 | 2065 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2066 | { |
f5236013 | 2067 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2068 | struct nfsd4_slot *slot = resp->cstate.slot; |
2069 | unsigned int base; | |
074fe897 | 2070 | |
557ce264 | 2071 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2072 | |
557ce264 AA |
2073 | slot->sl_opcnt = resp->opcnt; |
2074 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2075 | |
bf5c43c8 | 2076 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2077 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2078 | slot->sl_datalen = 0; |
bf864a31 | 2079 | return; |
074fe897 | 2080 | } |
f5236013 BF |
2081 | base = resp->cstate.data_offset; |
2082 | slot->sl_datalen = buf->len - base; | |
2083 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2084 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2085 | return; | |
074fe897 AA |
2086 | } |
2087 | ||
2088 | /* | |
abfabf8c AA |
2089 | * Encode the replay sequence operation from the slot values. |
2090 | * If cachethis is FALSE encode the uncached rep error on the next | |
2091 | * operation which sets resp->p and increments resp->opcnt for | |
2092 | * nfs4svc_encode_compoundres. | |
074fe897 | 2093 | * |
074fe897 | 2094 | */ |
abfabf8c AA |
2095 | static __be32 |
2096 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2097 | struct nfsd4_compoundres *resp) | |
074fe897 | 2098 | { |
abfabf8c AA |
2099 | struct nfsd4_op *op; |
2100 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2101 | |
abfabf8c AA |
2102 | /* Encode the replayed sequence operation */ |
2103 | op = &args->ops[resp->opcnt - 1]; | |
2104 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2105 | |
abfabf8c | 2106 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2107 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2108 | op = &args->ops[resp->opcnt++]; |
2109 | op->status = nfserr_retry_uncached_rep; | |
2110 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2111 | } |
abfabf8c | 2112 | return op->status; |
074fe897 AA |
2113 | } |
2114 | ||
2115 | /* | |
557ce264 AA |
2116 | * The sequence operation is not cached because we can use the slot and |
2117 | * session values. | |
074fe897 | 2118 | */ |
3ca2eb98 | 2119 | static __be32 |
bf864a31 AA |
2120 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2121 | struct nfsd4_sequence *seq) | |
074fe897 | 2122 | { |
557ce264 | 2123 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2124 | struct xdr_stream *xdr = &resp->xdr; |
2125 | __be32 *p; | |
074fe897 AA |
2126 | __be32 status; |
2127 | ||
557ce264 | 2128 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2129 | |
abfabf8c | 2130 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2131 | if (status) |
abfabf8c | 2132 | return status; |
074fe897 | 2133 | |
f5236013 BF |
2134 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2135 | if (!p) { | |
2136 | WARN_ON_ONCE(1); | |
2137 | return nfserr_serverfault; | |
2138 | } | |
2139 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2140 | xdr_commit_encode(xdr); | |
074fe897 | 2141 | |
557ce264 | 2142 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2143 | return slot->sl_status; |
074fe897 AA |
2144 | } |
2145 | ||
0733d213 AA |
2146 | /* |
2147 | * Set the exchange_id flags returned by the server. | |
2148 | */ | |
2149 | static void | |
2150 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2151 | { | |
2152 | /* pNFS is not supported */ | |
2153 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2154 | ||
2155 | /* Referrals are supported, Migration is not. */ | |
2156 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2157 | ||
2158 | /* set the wire flags to return to client. */ | |
2159 | clid->flags = new->cl_exchange_flags; | |
2160 | } | |
2161 | ||
631fc9ea BF |
2162 | static bool client_has_state(struct nfs4_client *clp) |
2163 | { | |
2164 | /* | |
2165 | * Note clp->cl_openowners check isn't quite right: there's no | |
2166 | * need to count owners without stateid's. | |
2167 | * | |
2168 | * Also note we should probably be using this in 4.0 case too. | |
2169 | */ | |
6eccece9 BF |
2170 | return !list_empty(&clp->cl_openowners) |
2171 | || !list_empty(&clp->cl_delegations) | |
2172 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2173 | } |
2174 | ||
069b6ad4 AA |
2175 | __be32 |
2176 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2177 | struct nfsd4_compound_state *cstate, | |
2178 | struct nfsd4_exchange_id *exid) | |
2179 | { | |
3dbacee6 TM |
2180 | struct nfs4_client *conf, *new; |
2181 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2182 | __be32 status; |
363168b4 | 2183 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2184 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2185 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2186 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2187 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2188 | |
363168b4 | 2189 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2190 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2191 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2192 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2193 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2194 | |
a084daf5 | 2195 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2196 | return nfserr_inval; |
2197 | ||
0733d213 | 2198 | switch (exid->spa_how) { |
57266a6e BF |
2199 | case SP4_MACH_CRED: |
2200 | if (!svc_rqst_integrity_protected(rqstp)) | |
2201 | return nfserr_inval; | |
0733d213 AA |
2202 | case SP4_NONE: |
2203 | break; | |
063b0fb9 BF |
2204 | default: /* checked by xdr code */ |
2205 | WARN_ON_ONCE(1); | |
0733d213 | 2206 | case SP4_SSV: |
dd30333c | 2207 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2208 | } |
2209 | ||
5cc40fd7 TM |
2210 | new = create_client(exid->clname, rqstp, &verf); |
2211 | if (new == NULL) | |
2212 | return nfserr_jukebox; | |
2213 | ||
2dbb269d | 2214 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2215 | nfs4_lock_state(); |
3dbacee6 | 2216 | spin_lock(&nn->client_lock); |
382a62e7 | 2217 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2218 | if (conf) { |
83e08fd4 BF |
2219 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2220 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2221 | ||
136e658d BF |
2222 | if (update) { |
2223 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2224 | status = nfserr_inval; |
1a308118 BF |
2225 | goto out; |
2226 | } | |
57266a6e BF |
2227 | if (!mach_creds_match(conf, rqstp)) { |
2228 | status = nfserr_wrong_cred; | |
2229 | goto out; | |
2230 | } | |
136e658d | 2231 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2232 | status = nfserr_perm; |
136e658d BF |
2233 | goto out; |
2234 | } | |
2235 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2236 | status = nfserr_not_same; |
2237 | goto out; | |
2238 | } | |
136e658d BF |
2239 | /* case 6 */ |
2240 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2241 | goto out_copy; |
0733d213 | 2242 | } |
136e658d | 2243 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2244 | if (client_has_state(conf)) { |
2245 | status = nfserr_clid_inuse; | |
0733d213 AA |
2246 | goto out; |
2247 | } | |
0733d213 AA |
2248 | goto out_new; |
2249 | } | |
136e658d | 2250 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2251 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2252 | goto out_copy; |
2253 | } | |
2254 | /* case 5, client reboot */ | |
3dbacee6 | 2255 | conf = NULL; |
136e658d | 2256 | goto out_new; |
6ddbbbfe MS |
2257 | } |
2258 | ||
2dbb269d | 2259 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2260 | status = nfserr_noent; |
2261 | goto out; | |
0733d213 AA |
2262 | } |
2263 | ||
a99454aa | 2264 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2265 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2266 | unhash_client_locked(unconf); |
0733d213 | 2267 | |
2dbb269d | 2268 | /* case 1 (normal case) */ |
0733d213 | 2269 | out_new: |
fd699b8a JL |
2270 | if (conf) { |
2271 | status = mark_client_expired_locked(conf); | |
2272 | if (status) | |
2273 | goto out; | |
2274 | } | |
4f540e29 | 2275 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2276 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2277 | |
c212cecf | 2278 | gen_clid(new, nn); |
ac55fdc4 | 2279 | add_to_unconfirmed(new); |
3dbacee6 | 2280 | swap(new, conf); |
0733d213 | 2281 | out_copy: |
5cc40fd7 TM |
2282 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2283 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2284 | |
5cc40fd7 TM |
2285 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2286 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2287 | |
2288 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2289 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2290 | status = nfs_ok; |
2291 | ||
2292 | out: | |
3dbacee6 | 2293 | spin_unlock(&nn->client_lock); |
0733d213 | 2294 | nfs4_unlock_state(); |
5cc40fd7 | 2295 | if (new) |
3dbacee6 TM |
2296 | expire_client(new); |
2297 | if (unconf) | |
2298 | expire_client(unconf); | |
0733d213 | 2299 | return status; |
069b6ad4 AA |
2300 | } |
2301 | ||
57b7b43b | 2302 | static __be32 |
88e588d5 | 2303 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2304 | { |
88e588d5 AA |
2305 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2306 | slot_seqid); | |
b85d4c01 BH |
2307 | |
2308 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2309 | if (slot_inuse) { |
2310 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2311 | return nfserr_jukebox; |
2312 | else | |
2313 | return nfserr_seq_misordered; | |
2314 | } | |
f6d82485 | 2315 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2316 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2317 | return nfs_ok; |
88e588d5 | 2318 | if (seqid == slot_seqid) |
b85d4c01 | 2319 | return nfserr_replay_cache; |
b85d4c01 BH |
2320 | return nfserr_seq_misordered; |
2321 | } | |
2322 | ||
49557cc7 AA |
2323 | /* |
2324 | * Cache the create session result into the create session single DRC | |
2325 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2326 | * Do this for solo or embedded create session operations. | |
2327 | */ | |
2328 | static void | |
2329 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2330 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2331 | { |
2332 | slot->sl_status = nfserr; | |
2333 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2334 | } | |
2335 | ||
2336 | static __be32 | |
2337 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2338 | struct nfsd4_clid_slot *slot) | |
2339 | { | |
2340 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2341 | return slot->sl_status; | |
2342 | } | |
2343 | ||
1b74c25b MJ |
2344 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2345 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2346 | 1 + /* MIN tag is length with zero, only length */ \ | |
2347 | 3 + /* version, opcount, opcode */ \ | |
2348 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2349 | /* seqid, slotID, slotID, cache */ \ | |
2350 | 4 ) * sizeof(__be32)) | |
2351 | ||
2352 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2353 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2354 | 1 + /* status */ \ | |
2355 | 1 + /* MIN tag is length with zero, only length */ \ | |
2356 | 3 + /* opcount, opcode, opstatus*/ \ | |
2357 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2358 | /* seqid, slotID, slotID, slotID, status */ \ | |
2359 | 5 ) * sizeof(__be32)) | |
2360 | ||
55c760cf | 2361 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2362 | { |
55c760cf BF |
2363 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2364 | ||
373cd409 BF |
2365 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2366 | return nfserr_toosmall; | |
2367 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2368 | return nfserr_toosmall; | |
55c760cf BF |
2369 | ca->headerpadsz = 0; |
2370 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2371 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2372 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2373 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2374 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2375 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2376 | /* | |
2377 | * Note decreasing slot size below client's request may make it | |
2378 | * difficult for client to function correctly, whereas | |
2379 | * decreasing the number of slots will (just?) affect | |
2380 | * performance. When short on memory we therefore prefer to | |
2381 | * decrease number of slots instead of their size. Clients that | |
2382 | * request larger slots than they need will get poor results: | |
2383 | */ | |
2384 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2385 | if (!ca->maxreqs) | |
2386 | return nfserr_jukebox; | |
2387 | ||
373cd409 | 2388 | return nfs_ok; |
1b74c25b MJ |
2389 | } |
2390 | ||
8a891633 KM |
2391 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2392 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2393 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2394 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2395 | ||
06b332a5 | 2396 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2397 | { |
06b332a5 BF |
2398 | ca->headerpadsz = 0; |
2399 | ||
2400 | /* | |
2401 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2402 | * don't even do gss on the backchannel yet. But this is still | |
2403 | * less than 1k. Tighten up this estimate in the unlikely event | |
2404 | * it turns out to be a problem for some client: | |
2405 | */ | |
8a891633 | 2406 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2407 | return nfserr_toosmall; |
8a891633 | 2408 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2409 | return nfserr_toosmall; |
2410 | ca->maxresp_cached = 0; | |
2411 | if (ca->maxops < 2) | |
2412 | return nfserr_toosmall; | |
2413 | ||
2414 | return nfs_ok; | |
1b74c25b MJ |
2415 | } |
2416 | ||
b78724b7 BF |
2417 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2418 | { | |
2419 | switch (cbs->flavor) { | |
2420 | case RPC_AUTH_NULL: | |
2421 | case RPC_AUTH_UNIX: | |
2422 | return nfs_ok; | |
2423 | default: | |
2424 | /* | |
2425 | * GSS case: the spec doesn't allow us to return this | |
2426 | * error. But it also doesn't allow us not to support | |
2427 | * GSS. | |
2428 | * I'd rather this fail hard than return some error the | |
2429 | * client might think it can already handle: | |
2430 | */ | |
2431 | return nfserr_encr_alg_unsupp; | |
2432 | } | |
2433 | } | |
2434 | ||
069b6ad4 AA |
2435 | __be32 |
2436 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2437 | struct nfsd4_compound_state *cstate, | |
2438 | struct nfsd4_create_session *cr_ses) | |
2439 | { | |
363168b4 | 2440 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2441 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2442 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2443 | struct nfsd4_session *new; |
81f0b2a4 | 2444 | struct nfsd4_conn *conn; |
49557cc7 | 2445 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2446 | __be32 status = 0; |
8daae4dc | 2447 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2448 | |
a62573dc MJ |
2449 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2450 | return nfserr_inval; | |
b78724b7 BF |
2451 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2452 | if (status) | |
2453 | return status; | |
55c760cf | 2454 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2455 | if (status) |
2456 | return status; | |
2457 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2458 | if (status) |
f403e450 | 2459 | goto out_release_drc_mem; |
81f0b2a4 | 2460 | status = nfserr_jukebox; |
60810e54 | 2461 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2462 | if (!new) |
2463 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2464 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2465 | if (!conn) | |
2466 | goto out_free_session; | |
a62573dc | 2467 | |
ec6b5d7b | 2468 | nfs4_lock_state(); |
d20c11d8 | 2469 | spin_lock(&nn->client_lock); |
0a7ec377 | 2470 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2471 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2472 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2473 | |
2474 | if (conf) { | |
57266a6e BF |
2475 | status = nfserr_wrong_cred; |
2476 | if (!mach_creds_match(conf, rqstp)) | |
2477 | goto out_free_conn; | |
49557cc7 AA |
2478 | cs_slot = &conf->cl_cs_slot; |
2479 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2480 | if (status == nfserr_replay_cache) { |
49557cc7 | 2481 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2482 | goto out_free_conn; |
49557cc7 | 2483 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2484 | status = nfserr_seq_misordered; |
81f0b2a4 | 2485 | goto out_free_conn; |
ec6b5d7b | 2486 | } |
ec6b5d7b AA |
2487 | } else if (unconf) { |
2488 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2489 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2490 | status = nfserr_clid_inuse; |
81f0b2a4 | 2491 | goto out_free_conn; |
ec6b5d7b | 2492 | } |
57266a6e BF |
2493 | status = nfserr_wrong_cred; |
2494 | if (!mach_creds_match(unconf, rqstp)) | |
2495 | goto out_free_conn; | |
49557cc7 AA |
2496 | cs_slot = &unconf->cl_cs_slot; |
2497 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2498 | if (status) { |
2499 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2500 | status = nfserr_seq_misordered; |
81f0b2a4 | 2501 | goto out_free_conn; |
ec6b5d7b | 2502 | } |
382a62e7 | 2503 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2504 | if (old) { |
d20c11d8 | 2505 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2506 | if (status) { |
2507 | old = NULL; | |
221a6876 | 2508 | goto out_free_conn; |
7abea1e8 | 2509 | } |
221a6876 | 2510 | } |
8f9d3d3b | 2511 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2512 | conf = unconf; |
2513 | } else { | |
2514 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2515 | goto out_free_conn; |
ec6b5d7b | 2516 | } |
81f0b2a4 | 2517 | status = nfs_ok; |
408b79bc BF |
2518 | /* |
2519 | * We do not support RDMA or persistent sessions | |
2520 | */ | |
2521 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2522 | cr_ses->flags &= ~SESSION4_RDMA; | |
2523 | ||
81f0b2a4 | 2524 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2525 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2526 | |
ac7c46f2 | 2527 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2528 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2529 | cs_slot->sl_seqid++; |
49557cc7 | 2530 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2531 | |
d20c11d8 | 2532 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2533 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2534 | spin_unlock(&nn->client_lock); |
2535 | /* init connection and backchannel */ | |
2536 | nfsd4_init_conn(rqstp, conn, new); | |
2537 | nfsd4_put_session(new); | |
ec6b5d7b | 2538 | nfs4_unlock_state(); |
d20c11d8 JL |
2539 | if (old) |
2540 | expire_client(old); | |
ec6b5d7b | 2541 | return status; |
81f0b2a4 | 2542 | out_free_conn: |
d20c11d8 | 2543 | spin_unlock(&nn->client_lock); |
266533c6 | 2544 | nfs4_unlock_state(); |
81f0b2a4 | 2545 | free_conn(conn); |
d20c11d8 JL |
2546 | if (old) |
2547 | expire_client(old); | |
81f0b2a4 BF |
2548 | out_free_session: |
2549 | __free_session(new); | |
55c760cf BF |
2550 | out_release_drc_mem: |
2551 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2552 | return status; |
069b6ad4 AA |
2553 | } |
2554 | ||
1d1bc8f2 BF |
2555 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2556 | { | |
2557 | switch (*dir) { | |
2558 | case NFS4_CDFC4_FORE: | |
2559 | case NFS4_CDFC4_BACK: | |
2560 | return nfs_ok; | |
2561 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2562 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2563 | *dir = NFS4_CDFC4_BOTH; | |
2564 | return nfs_ok; | |
2565 | }; | |
2566 | return nfserr_inval; | |
2567 | } | |
2568 | ||
cb73a9f4 BF |
2569 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2570 | { | |
2571 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2572 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2573 | __be32 status; |
cb73a9f4 | 2574 | |
b78724b7 BF |
2575 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2576 | if (status) | |
2577 | return status; | |
c9a49628 | 2578 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2579 | session->se_cb_prog = bc->bc_cb_program; |
2580 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2581 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2582 | |
2583 | nfsd4_probe_callback(session->se_client); | |
2584 | ||
2585 | return nfs_ok; | |
2586 | } | |
2587 | ||
1d1bc8f2 BF |
2588 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2589 | struct nfsd4_compound_state *cstate, | |
2590 | struct nfsd4_bind_conn_to_session *bcts) | |
2591 | { | |
2592 | __be32 status; | |
3ba63671 | 2593 | struct nfsd4_conn *conn; |
4f6e6c17 | 2594 | struct nfsd4_session *session; |
d4e19e70 TM |
2595 | struct net *net = SVC_NET(rqstp); |
2596 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2597 | |
2598 | if (!nfsd4_last_compound_op(rqstp)) | |
2599 | return nfserr_not_only_op; | |
4f6e6c17 | 2600 | nfs4_lock_state(); |
c9a49628 | 2601 | spin_lock(&nn->client_lock); |
d4e19e70 | 2602 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2603 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2604 | if (!session) |
d4e19e70 | 2605 | goto out_no_session; |
57266a6e BF |
2606 | status = nfserr_wrong_cred; |
2607 | if (!mach_creds_match(session->se_client, rqstp)) | |
2608 | goto out; | |
1d1bc8f2 | 2609 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2610 | if (status) |
4f6e6c17 | 2611 | goto out; |
3ba63671 | 2612 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2613 | status = nfserr_jukebox; |
3ba63671 | 2614 | if (!conn) |
4f6e6c17 BF |
2615 | goto out; |
2616 | nfsd4_init_conn(rqstp, conn, session); | |
2617 | status = nfs_ok; | |
2618 | out: | |
d4e19e70 TM |
2619 | nfsd4_put_session(session); |
2620 | out_no_session: | |
4f6e6c17 BF |
2621 | nfs4_unlock_state(); |
2622 | return status; | |
1d1bc8f2 BF |
2623 | } |
2624 | ||
5d4cec2f BF |
2625 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2626 | { | |
2627 | if (!session) | |
2628 | return 0; | |
2629 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2630 | } | |
2631 | ||
069b6ad4 AA |
2632 | __be32 |
2633 | nfsd4_destroy_session(struct svc_rqst *r, | |
2634 | struct nfsd4_compound_state *cstate, | |
2635 | struct nfsd4_destroy_session *sessionid) | |
2636 | { | |
e10e0cfc | 2637 | struct nfsd4_session *ses; |
abcdff09 | 2638 | __be32 status; |
f0f51f5c | 2639 | int ref_held_by_me = 0; |
d4e19e70 TM |
2640 | struct net *net = SVC_NET(r); |
2641 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2642 | |
abcdff09 BF |
2643 | nfs4_lock_state(); |
2644 | status = nfserr_not_only_op; | |
5d4cec2f | 2645 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2646 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2647 | goto out; |
f0f51f5c | 2648 | ref_held_by_me++; |
57716355 | 2649 | } |
e10e0cfc | 2650 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2651 | spin_lock(&nn->client_lock); |
d4e19e70 | 2652 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2653 | if (!ses) |
2654 | goto out_client_lock; | |
57266a6e BF |
2655 | status = nfserr_wrong_cred; |
2656 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2657 | goto out_put_session; |
f0f51f5c | 2658 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2659 | if (status) |
f0f51f5c | 2660 | goto out_put_session; |
e10e0cfc | 2661 | unhash_session(ses); |
c9a49628 | 2662 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2663 | |
84f5f7cc | 2664 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2665 | |
c9a49628 | 2666 | spin_lock(&nn->client_lock); |
e10e0cfc | 2667 | status = nfs_ok; |
f0f51f5c | 2668 | out_put_session: |
d4e19e70 | 2669 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2670 | out_client_lock: |
2671 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2672 | out: |
abcdff09 | 2673 | nfs4_unlock_state(); |
e10e0cfc | 2674 | return status; |
069b6ad4 AA |
2675 | } |
2676 | ||
a663bdd8 | 2677 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2678 | { |
2679 | struct nfsd4_conn *c; | |
2680 | ||
2681 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2682 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2683 | return c; |
2684 | } | |
2685 | } | |
2686 | return NULL; | |
2687 | } | |
2688 | ||
57266a6e | 2689 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2690 | { |
2691 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2692 | struct nfsd4_conn *c; |
57266a6e | 2693 | __be32 status = nfs_ok; |
21b75b01 | 2694 | int ret; |
328ead28 BF |
2695 | |
2696 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2697 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2698 | if (c) |
2699 | goto out_free; | |
2700 | status = nfserr_conn_not_bound_to_session; | |
2701 | if (clp->cl_mach_cred) | |
2702 | goto out_free; | |
328ead28 BF |
2703 | __nfsd4_hash_conn(new, ses); |
2704 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2705 | ret = nfsd4_register_conn(new); |
2706 | if (ret) | |
2707 | /* oops; xprt is already down: */ | |
2708 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2709 | return nfs_ok; |
2710 | out_free: | |
2711 | spin_unlock(&clp->cl_lock); | |
2712 | free_conn(new); | |
2713 | return status; | |
328ead28 BF |
2714 | } |
2715 | ||
868b89c3 MJ |
2716 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2717 | { | |
2718 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2719 | ||
2720 | return args->opcnt > session->se_fchannel.maxops; | |
2721 | } | |
2722 | ||
ae82a8d0 MJ |
2723 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2724 | struct nfsd4_session *session) | |
2725 | { | |
2726 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2727 | ||
2728 | return xb->len > session->se_fchannel.maxreq_sz; | |
2729 | } | |
2730 | ||
069b6ad4 | 2731 | __be32 |
b85d4c01 | 2732 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2733 | struct nfsd4_compound_state *cstate, |
2734 | struct nfsd4_sequence *seq) | |
2735 | { | |
f9bb94c4 | 2736 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2737 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2738 | struct nfsd4_session *session; |
221a6876 | 2739 | struct nfs4_client *clp; |
b85d4c01 | 2740 | struct nfsd4_slot *slot; |
a663bdd8 | 2741 | struct nfsd4_conn *conn; |
57b7b43b | 2742 | __be32 status; |
47ee5298 | 2743 | int buflen; |
d4e19e70 TM |
2744 | struct net *net = SVC_NET(rqstp); |
2745 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2746 | |
f9bb94c4 AA |
2747 | if (resp->opcnt != 1) |
2748 | return nfserr_sequence_pos; | |
2749 | ||
a663bdd8 BF |
2750 | /* |
2751 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2752 | * below. | |
2753 | */ | |
2754 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2755 | if (!conn) | |
2756 | return nfserr_jukebox; | |
2757 | ||
c9a49628 | 2758 | spin_lock(&nn->client_lock); |
d4e19e70 | 2759 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2760 | if (!session) |
221a6876 BF |
2761 | goto out_no_session; |
2762 | clp = session->se_client; | |
b85d4c01 | 2763 | |
868b89c3 MJ |
2764 | status = nfserr_too_many_ops; |
2765 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2766 | goto out_put_session; |
868b89c3 | 2767 | |
ae82a8d0 MJ |
2768 | status = nfserr_req_too_big; |
2769 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2770 | goto out_put_session; |
ae82a8d0 | 2771 | |
b85d4c01 | 2772 | status = nfserr_badslot; |
6c18ba9f | 2773 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2774 | goto out_put_session; |
b85d4c01 | 2775 | |
557ce264 | 2776 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2777 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2778 | ||
a8dfdaeb AA |
2779 | /* We do not negotiate the number of slots yet, so set the |
2780 | * maxslots to the session maxreqs which is used to encode | |
2781 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2782 | seq->maxslots = session->se_fchannel.maxreqs; | |
2783 | ||
73e79482 BF |
2784 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2785 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2786 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2787 | status = nfserr_seq_misordered; |
2788 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2789 | goto out_put_session; |
b85d4c01 BH |
2790 | cstate->slot = slot; |
2791 | cstate->session = session; | |
4b24ca7d | 2792 | cstate->clp = clp; |
da3846a2 | 2793 | /* Return the cached reply status and set cstate->status |
557ce264 | 2794 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2795 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2796 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2797 | goto out; |
b85d4c01 BH |
2798 | } |
2799 | if (status) | |
66b2b9b2 | 2800 | goto out_put_session; |
b85d4c01 | 2801 | |
57266a6e | 2802 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2803 | conn = NULL; |
57266a6e BF |
2804 | if (status) |
2805 | goto out_put_session; | |
328ead28 | 2806 | |
47ee5298 BF |
2807 | buflen = (seq->cachethis) ? |
2808 | session->se_fchannel.maxresp_cached : | |
2809 | session->se_fchannel.maxresp_sz; | |
2810 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2811 | nfserr_rep_too_big; | |
a5cddc88 | 2812 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2813 | goto out_put_session; |
32aaa62e | 2814 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2815 | |
2816 | status = nfs_ok; | |
b85d4c01 | 2817 | /* Success! bump slot seqid */ |
b85d4c01 | 2818 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2819 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2820 | if (seq->cachethis) |
2821 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2822 | else |
2823 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2824 | |
2825 | cstate->slot = slot; | |
2826 | cstate->session = session; | |
4b24ca7d | 2827 | cstate->clp = clp; |
b85d4c01 | 2828 | |
b85d4c01 | 2829 | out: |
221a6876 BF |
2830 | switch (clp->cl_cb_state) { |
2831 | case NFSD4_CB_DOWN: | |
2832 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2833 | break; | |
2834 | case NFSD4_CB_FAULT: | |
2835 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2836 | break; | |
2837 | default: | |
2838 | seq->status_flags = 0; | |
aaf84eb9 | 2839 | } |
3bd64a5b BF |
2840 | if (!list_empty(&clp->cl_revoked)) |
2841 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2842 | out_no_session: |
3f42d2c4 KM |
2843 | if (conn) |
2844 | free_conn(conn); | |
c9a49628 | 2845 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2846 | return status; |
66b2b9b2 | 2847 | out_put_session: |
d4e19e70 | 2848 | nfsd4_put_session_locked(session); |
221a6876 | 2849 | goto out_no_session; |
069b6ad4 AA |
2850 | } |
2851 | ||
b607664e TM |
2852 | void |
2853 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2854 | { | |
2855 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2856 | ||
2857 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2858 | if (cs->status != nfserr_replay_cache) { |
2859 | nfsd4_store_cache_entry(resp); | |
2860 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2861 | } | |
d4e19e70 | 2862 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2863 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2864 | } else if (cs->clp) |
2865 | put_client_renew(cs->clp); | |
b607664e TM |
2866 | } |
2867 | ||
345c2842 MJ |
2868 | __be32 |
2869 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2870 | { | |
6b10ad19 TM |
2871 | struct nfs4_client *conf, *unconf; |
2872 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2873 | __be32 status = 0; |
8daae4dc | 2874 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2875 | |
2876 | nfs4_lock_state(); | |
6b10ad19 | 2877 | spin_lock(&nn->client_lock); |
0a7ec377 | 2878 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2879 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2880 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2881 | |
2882 | if (conf) { | |
c0293b01 | 2883 | if (client_has_state(conf)) { |
345c2842 MJ |
2884 | status = nfserr_clientid_busy; |
2885 | goto out; | |
2886 | } | |
fd699b8a JL |
2887 | status = mark_client_expired_locked(conf); |
2888 | if (status) | |
2889 | goto out; | |
6b10ad19 | 2890 | clp = conf; |
345c2842 MJ |
2891 | } else if (unconf) |
2892 | clp = unconf; | |
2893 | else { | |
2894 | status = nfserr_stale_clientid; | |
2895 | goto out; | |
2896 | } | |
57266a6e | 2897 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2898 | clp = NULL; |
57266a6e BF |
2899 | status = nfserr_wrong_cred; |
2900 | goto out; | |
2901 | } | |
6b10ad19 | 2902 | unhash_client_locked(clp); |
345c2842 | 2903 | out: |
6b10ad19 | 2904 | spin_unlock(&nn->client_lock); |
345c2842 | 2905 | nfs4_unlock_state(); |
6b10ad19 TM |
2906 | if (clp) |
2907 | expire_client(clp); | |
345c2842 MJ |
2908 | return status; |
2909 | } | |
2910 | ||
4dc6ec00 BF |
2911 | __be32 |
2912 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2913 | { | |
57b7b43b | 2914 | __be32 status = 0; |
bcecf1cc | 2915 | |
4dc6ec00 BF |
2916 | if (rc->rca_one_fs) { |
2917 | if (!cstate->current_fh.fh_dentry) | |
2918 | return nfserr_nofilehandle; | |
2919 | /* | |
2920 | * We don't take advantage of the rca_one_fs case. | |
2921 | * That's OK, it's optional, we can safely ignore it. | |
2922 | */ | |
2923 | return nfs_ok; | |
2924 | } | |
bcecf1cc | 2925 | |
4dc6ec00 | 2926 | nfs4_lock_state(); |
bcecf1cc | 2927 | status = nfserr_complete_already; |
a52d726b JL |
2928 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2929 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2930 | goto out; |
2931 | ||
2932 | status = nfserr_stale_clientid; | |
2933 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2934 | /* |
2935 | * The following error isn't really legal. | |
2936 | * But we only get here if the client just explicitly | |
2937 | * destroyed the client. Surely it no longer cares what | |
2938 | * error it gets back on an operation for the dead | |
2939 | * client. | |
2940 | */ | |
bcecf1cc MJ |
2941 | goto out; |
2942 | ||
2943 | status = nfs_ok; | |
2a4317c5 | 2944 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2945 | out: |
4dc6ec00 | 2946 | nfs4_unlock_state(); |
bcecf1cc | 2947 | return status; |
4dc6ec00 BF |
2948 | } |
2949 | ||
b37ad28b | 2950 | __be32 |
b591480b BF |
2951 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2952 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2953 | { |
a084daf5 | 2954 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2955 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
2956 | struct nfs4_client *conf, *new; |
2957 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 2958 | __be32 status; |
c212cecf SK |
2959 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2960 | ||
5cc40fd7 TM |
2961 | new = create_client(clname, rqstp, &clverifier); |
2962 | if (new == NULL) | |
2963 | return nfserr_jukebox; | |
63db4632 | 2964 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2965 | nfs4_lock_state(); |
3dbacee6 | 2966 | spin_lock(&nn->client_lock); |
382a62e7 | 2967 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2968 | if (conf) { |
63db4632 | 2969 | /* case 0: */ |
1da177e4 | 2970 | status = nfserr_clid_inuse; |
e203d506 BF |
2971 | if (clp_used_exchangeid(conf)) |
2972 | goto out; | |
026722c2 | 2973 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2974 | char addr_str[INET6_ADDRSTRLEN]; |
2975 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2976 | sizeof(addr_str)); | |
2977 | dprintk("NFSD: setclientid: string in use by client " | |
2978 | "at %s\n", addr_str); | |
1da177e4 LT |
2979 | goto out; |
2980 | } | |
1da177e4 | 2981 | } |
a99454aa | 2982 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 2983 | if (unconf) |
3dbacee6 | 2984 | unhash_client_locked(unconf); |
34b232bb | 2985 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2986 | /* case 1: probable callback update */ |
1da177e4 | 2987 | copy_clid(new, conf); |
34b232bb | 2988 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2989 | gen_clid(new, nn); |
8323c3b2 | 2990 | new->cl_minorversion = 0; |
6f3d772f | 2991 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2992 | add_to_unconfirmed(new); |
1da177e4 LT |
2993 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2994 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2995 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 2996 | new = NULL; |
1da177e4 LT |
2997 | status = nfs_ok; |
2998 | out: | |
3dbacee6 | 2999 | spin_unlock(&nn->client_lock); |
1da177e4 | 3000 | nfs4_unlock_state(); |
5cc40fd7 TM |
3001 | if (new) |
3002 | free_client(new); | |
3dbacee6 TM |
3003 | if (unconf) |
3004 | expire_client(unconf); | |
1da177e4 LT |
3005 | return status; |
3006 | } | |
3007 | ||
3008 | ||
b37ad28b | 3009 | __be32 |
b591480b BF |
3010 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
3011 | struct nfsd4_compound_state *cstate, | |
3012 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 3013 | { |
21ab45a4 | 3014 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3015 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3016 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3017 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3018 | __be32 status; |
7f2210fa | 3019 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3020 | |
2c142baa | 3021 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3022 | return nfserr_stale_clientid; |
1da177e4 | 3023 | nfs4_lock_state(); |
21ab45a4 | 3024 | |
d20c11d8 | 3025 | spin_lock(&nn->client_lock); |
8daae4dc | 3026 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3027 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3028 | /* |
8695b90a BF |
3029 | * We try hard to give out unique clientid's, so if we get an |
3030 | * attempt to confirm the same clientid with a different cred, | |
3031 | * there's a bug somewhere. Let's charitably assume it's our | |
3032 | * bug. | |
a186e767 | 3033 | */ |
8695b90a BF |
3034 | status = nfserr_serverfault; |
3035 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3036 | goto out; | |
3037 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3038 | goto out; | |
63db4632 | 3039 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3040 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3041 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3042 | status = nfs_ok; |
90d700b7 BF |
3043 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3044 | status = nfserr_stale_clientid; | |
3045 | goto out; | |
3046 | } | |
3047 | status = nfs_ok; | |
3048 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3049 | old = unconf; |
3050 | unhash_client_locked(old); | |
8695b90a | 3051 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3052 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3053 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3054 | if (old) { | |
3055 | status = mark_client_expired_locked(old); | |
7abea1e8 JL |
3056 | if (status) { |
3057 | old = NULL; | |
221a6876 | 3058 | goto out; |
7abea1e8 | 3059 | } |
221a6876 | 3060 | } |
8695b90a | 3061 | move_to_confirmed(unconf); |
d20c11d8 | 3062 | conf = unconf; |
08e8987c | 3063 | } |
d20c11d8 JL |
3064 | get_client_locked(conf); |
3065 | spin_unlock(&nn->client_lock); | |
3066 | nfsd4_probe_callback(conf); | |
3067 | spin_lock(&nn->client_lock); | |
3068 | put_client_renew_locked(conf); | |
1da177e4 | 3069 | out: |
d20c11d8 JL |
3070 | spin_unlock(&nn->client_lock); |
3071 | if (old) | |
3072 | expire_client(old); | |
1da177e4 LT |
3073 | nfs4_unlock_state(); |
3074 | return status; | |
3075 | } | |
3076 | ||
32513b40 BF |
3077 | static struct nfs4_file *nfsd4_alloc_file(void) |
3078 | { | |
3079 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3080 | } | |
3081 | ||
1da177e4 | 3082 | /* OPEN Share state helper functions */ |
f9c00c3a | 3083 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 3084 | { |
ca943217 | 3085 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 3086 | |
950e0118 TM |
3087 | lockdep_assert_held(&state_lock); |
3088 | ||
32513b40 | 3089 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3090 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3091 | INIT_LIST_HEAD(&fp->fi_stateids); |
3092 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 3093 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
3094 | fp->fi_had_conflict = false; |
3095 | fp->fi_lease = NULL; | |
baeb4ff0 | 3096 | fp->fi_share_deny = 0; |
32513b40 BF |
3097 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3098 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 3099 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3100 | } |
3101 | ||
e8ff2a84 | 3102 | void |
1da177e4 LT |
3103 | nfsd4_free_slabs(void) |
3104 | { | |
abf1135b CH |
3105 | kmem_cache_destroy(openowner_slab); |
3106 | kmem_cache_destroy(lockowner_slab); | |
3107 | kmem_cache_destroy(file_slab); | |
3108 | kmem_cache_destroy(stateid_slab); | |
3109 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3110 | } |
1da177e4 | 3111 | |
72083396 | 3112 | int |
e60d4398 N |
3113 | nfsd4_init_slabs(void) |
3114 | { | |
fe0750e5 BF |
3115 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3116 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3117 | if (openowner_slab == NULL) | |
abf1135b | 3118 | goto out; |
fe0750e5 | 3119 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3120 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3121 | if (lockowner_slab == NULL) |
abf1135b | 3122 | goto out_free_openowner_slab; |
e60d4398 | 3123 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3124 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3125 | if (file_slab == NULL) |
abf1135b | 3126 | goto out_free_lockowner_slab; |
5ac049ac | 3127 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3128 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3129 | if (stateid_slab == NULL) |
abf1135b | 3130 | goto out_free_file_slab; |
5b2d21c1 | 3131 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3132 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3133 | if (deleg_slab == NULL) |
abf1135b | 3134 | goto out_free_stateid_slab; |
e60d4398 | 3135 | return 0; |
abf1135b CH |
3136 | |
3137 | out_free_stateid_slab: | |
3138 | kmem_cache_destroy(stateid_slab); | |
3139 | out_free_file_slab: | |
3140 | kmem_cache_destroy(file_slab); | |
3141 | out_free_lockowner_slab: | |
3142 | kmem_cache_destroy(lockowner_slab); | |
3143 | out_free_openowner_slab: | |
3144 | kmem_cache_destroy(openowner_slab); | |
3145 | out: | |
e60d4398 N |
3146 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3147 | return -ENOMEM; | |
1da177e4 LT |
3148 | } |
3149 | ||
ff194bd9 | 3150 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3151 | { |
ff194bd9 BF |
3152 | rp->rp_status = nfserr_serverfault; |
3153 | rp->rp_buflen = 0; | |
3154 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3155 | mutex_init(&rp->rp_mutex); |
3156 | } | |
3157 | ||
3158 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3159 | struct nfs4_stateowner *so) | |
3160 | { | |
3161 | if (!nfsd4_has_session(cstate)) { | |
3162 | mutex_lock(&so->so_replay.rp_mutex); | |
3163 | cstate->replay_owner = so; | |
3164 | atomic_inc(&so->so_count); | |
3165 | } | |
3166 | } | |
3167 | ||
3168 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3169 | { | |
3170 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3171 | ||
3172 | if (so != NULL) { | |
3173 | cstate->replay_owner = NULL; | |
3174 | mutex_unlock(&so->so_replay.rp_mutex); | |
3175 | nfs4_put_stateowner(so); | |
3176 | } | |
1da177e4 LT |
3177 | } |
3178 | ||
fe0750e5 | 3179 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3180 | { |
1da177e4 | 3181 | struct nfs4_stateowner *sop; |
1da177e4 | 3182 | |
fe0750e5 | 3183 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3184 | if (!sop) |
3185 | return NULL; | |
3186 | ||
3187 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3188 | if (!sop->so_owner.data) { | |
fe0750e5 | 3189 | kmem_cache_free(slab, sop); |
1da177e4 | 3190 | return NULL; |
ff194bd9 BF |
3191 | } |
3192 | sop->so_owner.len = owner->len; | |
3193 | ||
ea1da636 | 3194 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3195 | sop->so_client = clp; |
3196 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3197 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3198 | return sop; |
3199 | } | |
3200 | ||
fe0750e5 | 3201 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3202 | { |
d4f0489f | 3203 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3204 | |
d4f0489f TM |
3205 | list_add(&oo->oo_owner.so_strhash, |
3206 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3207 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3208 | } |
3209 | ||
8f4b54c5 JL |
3210 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3211 | { | |
d4f0489f | 3212 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3213 | } |
3214 | ||
6b180f0b JL |
3215 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3216 | { | |
3217 | struct nfs4_openowner *oo = openowner(so); | |
3218 | ||
3219 | kmem_cache_free(openowner_slab, oo); | |
3220 | } | |
3221 | ||
3222 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3223 | .so_unhash = nfs4_unhash_openowner, |
3224 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3225 | }; |
3226 | ||
fe0750e5 | 3227 | static struct nfs4_openowner * |
13d6f66b | 3228 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3229 | struct nfsd4_compound_state *cstate) |
3230 | { | |
13d6f66b | 3231 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3232 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3233 | |
fe0750e5 BF |
3234 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3235 | if (!oo) | |
ff194bd9 | 3236 | return NULL; |
6b180f0b | 3237 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3238 | oo->oo_owner.so_is_open_owner = 1; |
3239 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3240 | oo->oo_flags = 0; |
db24b3b4 JL |
3241 | if (nfsd4_has_session(cstate)) |
3242 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3243 | oo->oo_time = 0; |
38c387b5 | 3244 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3245 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3246 | spin_lock(&clp->cl_lock); |
3247 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3248 | if (ret == NULL) { |
3249 | hash_openowner(oo, clp, strhashval); | |
3250 | ret = oo; | |
3251 | } else | |
3252 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3253 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3254 | return oo; |
1da177e4 LT |
3255 | } |
3256 | ||
996e0938 | 3257 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3258 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3259 | |
d6f2bc5d | 3260 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3261 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3262 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3263 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3264 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3265 | get_nfs4_file(fp); |
11b9164a | 3266 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3267 | stp->st_access_bmap = 0; |
3268 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3269 | stp->st_openstp = NULL; |
1c755dc1 JL |
3270 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3271 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3272 | spin_lock(&fp->fi_lock); |
3273 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3274 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3275 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3276 | } |
3277 | ||
d3134b10 JL |
3278 | /* |
3279 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3280 | * CLOSE replay. We still do need to release any file access that is held by | |
3281 | * them before returning however. | |
3282 | */ | |
fd39ca9a | 3283 | static void |
d3134b10 | 3284 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3285 | { |
217526e7 | 3286 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3287 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3288 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3289 | nfsd_net_id); | |
73758fed | 3290 | |
fe0750e5 | 3291 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3292 | |
b401be22 JL |
3293 | /* |
3294 | * We know that we hold one reference via nfsd4_close, and another | |
3295 | * "persistent" reference for the client. If the refcount is higher | |
3296 | * than 2, then there are still calls in progress that are using this | |
3297 | * stateid. We can't put the sc_file reference until they are finished. | |
3298 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3299 | * there should be no danger of the refcount going back up again at | |
3300 | * this point. | |
3301 | */ | |
3302 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3303 | ||
d3134b10 JL |
3304 | release_all_access(s); |
3305 | if (s->st_stid.sc_file) { | |
3306 | put_nfs4_file(s->st_stid.sc_file); | |
3307 | s->st_stid.sc_file = NULL; | |
3308 | } | |
217526e7 JL |
3309 | |
3310 | spin_lock(&nn->client_lock); | |
3311 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3312 | oo->oo_last_closed_stid = s; |
73758fed | 3313 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3314 | oo->oo_time = get_seconds(); |
217526e7 JL |
3315 | spin_unlock(&nn->client_lock); |
3316 | if (last) | |
3317 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3318 | } |
3319 | ||
1da177e4 LT |
3320 | /* search file_hashtbl[] for file */ |
3321 | static struct nfs4_file * | |
ca943217 | 3322 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3323 | { |
ca943217 | 3324 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3325 | struct nfs4_file *fp; |
3326 | ||
950e0118 TM |
3327 | lockdep_assert_held(&state_lock); |
3328 | ||
89876f8c | 3329 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3330 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3331 | get_nfs4_file(fp); |
1da177e4 | 3332 | return fp; |
13cd2184 | 3333 | } |
1da177e4 LT |
3334 | } |
3335 | return NULL; | |
3336 | } | |
3337 | ||
950e0118 | 3338 | static struct nfs4_file * |
ca943217 | 3339 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3340 | { |
3341 | struct nfs4_file *fp; | |
3342 | ||
3343 | spin_lock(&state_lock); | |
ca943217 | 3344 | fp = find_file_locked(fh); |
950e0118 TM |
3345 | spin_unlock(&state_lock); |
3346 | return fp; | |
3347 | } | |
3348 | ||
3349 | static struct nfs4_file * | |
f9c00c3a | 3350 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3351 | { |
3352 | struct nfs4_file *fp; | |
3353 | ||
3354 | spin_lock(&state_lock); | |
ca943217 | 3355 | fp = find_file_locked(fh); |
950e0118 | 3356 | if (fp == NULL) { |
f9c00c3a | 3357 | nfsd4_init_file(new, fh); |
950e0118 TM |
3358 | fp = new; |
3359 | } | |
3360 | spin_unlock(&state_lock); | |
3361 | ||
3362 | return fp; | |
3363 | } | |
3364 | ||
1da177e4 LT |
3365 | /* |
3366 | * Called to check deny when READ with all zero stateid or | |
3367 | * WRITE with all zero or all one stateid | |
3368 | */ | |
b37ad28b | 3369 | static __be32 |
1da177e4 LT |
3370 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3371 | { | |
1da177e4 | 3372 | struct nfs4_file *fp; |
baeb4ff0 | 3373 | __be32 ret = nfs_ok; |
1da177e4 | 3374 | |
ca943217 | 3375 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3376 | if (!fp) |
baeb4ff0 JL |
3377 | return ret; |
3378 | /* Check for conflicting share reservations */ | |
1d31a253 | 3379 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3380 | if (fp->fi_share_deny & deny_type) |
3381 | ret = nfserr_locked; | |
1d31a253 | 3382 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3383 | put_nfs4_file(fp); |
3384 | return ret; | |
1da177e4 LT |
3385 | } |
3386 | ||
02e1215f | 3387 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3388 | { |
11b9164a TM |
3389 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3390 | nfsd_net_id); | |
e8c69d17 | 3391 | |
11b9164a | 3392 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3393 | |
dff1399f | 3394 | /* |
f54fe962 JL |
3395 | * We can't do this in nfsd_break_deleg_cb because it is |
3396 | * already holding inode->i_lock. | |
3397 | * | |
dff1399f JL |
3398 | * If the dl_time != 0, then we know that it has already been |
3399 | * queued for a lease break. Don't queue it again. | |
3400 | */ | |
f54fe962 | 3401 | spin_lock(&state_lock); |
dff1399f | 3402 | if (dp->dl_time == 0) { |
dff1399f | 3403 | dp->dl_time = get_seconds(); |
02e1215f | 3404 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3405 | } |
02e1215f JL |
3406 | spin_unlock(&state_lock); |
3407 | } | |
1da177e4 | 3408 | |
02e1215f JL |
3409 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3410 | { | |
3411 | /* | |
3412 | * We're assuming the state code never drops its reference | |
3413 | * without first removing the lease. Since we're in this lease | |
3414 | * callback (and since the lease code is serialized by the kernel | |
3415 | * lock) we know the server hasn't removed the lease yet, we know | |
3416 | * it's safe to take a reference. | |
3417 | */ | |
72c0b0fb | 3418 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3419 | nfsd4_cb_recall(dp); |
3420 | } | |
3421 | ||
1c8c601a | 3422 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3423 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3424 | { | |
acfdf5c3 BF |
3425 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3426 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3427 | |
7fa10cd1 BF |
3428 | if (!fp) { |
3429 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3430 | return; | |
3431 | } | |
3432 | if (fp->fi_had_conflict) { | |
3433 | WARN(1, "duplicate break on %p\n", fp); | |
3434 | return; | |
3435 | } | |
0272e1fd BF |
3436 | /* |
3437 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3438 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3439 | * in time: |
0272e1fd BF |
3440 | */ |
3441 | fl->fl_break_time = 0; | |
1da177e4 | 3442 | |
02e1215f | 3443 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3444 | fp->fi_had_conflict = true; |
3445 | /* | |
3446 | * If there are no delegations on the list, then we can't count on this | |
3447 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3448 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3449 | * true should keep any new delegations from being hashed. | |
3450 | */ | |
3451 | if (list_empty(&fp->fi_delegations)) | |
3452 | fl->fl_break_time = jiffies; | |
3453 | else | |
3454 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3455 | nfsd_break_one_deleg(dp); | |
02e1215f | 3456 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3457 | } |
3458 | ||
1da177e4 LT |
3459 | static |
3460 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3461 | { | |
3462 | if (arg & F_UNLCK) | |
3463 | return lease_modify(onlist, arg); | |
3464 | else | |
3465 | return -EAGAIN; | |
3466 | } | |
3467 | ||
7b021967 | 3468 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3469 | .lm_break = nfsd_break_deleg_cb, |
3470 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3471 | }; |
3472 | ||
7a8711c9 BF |
3473 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3474 | { | |
3475 | if (nfsd4_has_session(cstate)) | |
3476 | return nfs_ok; | |
3477 | if (seqid == so->so_seqid - 1) | |
3478 | return nfserr_replay_me; | |
3479 | if (seqid == so->so_seqid) | |
3480 | return nfs_ok; | |
3481 | return nfserr_bad_seqid; | |
3482 | } | |
1da177e4 | 3483 | |
4b24ca7d JL |
3484 | static __be32 lookup_clientid(clientid_t *clid, |
3485 | struct nfsd4_compound_state *cstate, | |
3486 | struct nfsd_net *nn) | |
3487 | { | |
3488 | struct nfs4_client *found; | |
3489 | ||
3490 | if (cstate->clp) { | |
3491 | found = cstate->clp; | |
3492 | if (!same_clid(&found->cl_clientid, clid)) | |
3493 | return nfserr_stale_clientid; | |
3494 | return nfs_ok; | |
3495 | } | |
3496 | ||
3497 | if (STALE_CLIENTID(clid, nn)) | |
3498 | return nfserr_stale_clientid; | |
3499 | ||
3500 | /* | |
3501 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3502 | * cached already then we know this is for is for v4.0 and "sessions" | |
3503 | * will be false. | |
3504 | */ | |
3505 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3506 | spin_lock(&nn->client_lock); |
4b24ca7d | 3507 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3508 | if (!found) { |
3509 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3510 | return nfserr_expired; |
3e339f96 TM |
3511 | } |
3512 | atomic_inc(&found->cl_refcount); | |
3513 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3514 | |
3515 | /* Cache the nfs4_client in cstate! */ | |
3516 | cstate->clp = found; | |
4b24ca7d JL |
3517 | return nfs_ok; |
3518 | } | |
3519 | ||
b37ad28b | 3520 | __be32 |
6668958f | 3521 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3522 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3523 | { |
1da177e4 LT |
3524 | clientid_t *clientid = &open->op_clientid; |
3525 | struct nfs4_client *clp = NULL; | |
3526 | unsigned int strhashval; | |
fe0750e5 | 3527 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3528 | __be32 status; |
1da177e4 | 3529 | |
2c142baa | 3530 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3531 | return nfserr_stale_clientid; |
32513b40 BF |
3532 | /* |
3533 | * In case we need it later, after we've already created the | |
3534 | * file and don't want to risk a further failure: | |
3535 | */ | |
3536 | open->op_file = nfsd4_alloc_file(); | |
3537 | if (open->op_file == NULL) | |
3538 | return nfserr_jukebox; | |
1da177e4 | 3539 | |
2d91e895 TM |
3540 | status = lookup_clientid(clientid, cstate, nn); |
3541 | if (status) | |
3542 | return status; | |
3543 | clp = cstate->clp; | |
3544 | ||
d4f0489f TM |
3545 | strhashval = ownerstr_hashval(&open->op_owner); |
3546 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3547 | open->op_openowner = oo; |
3548 | if (!oo) { | |
bcf130f9 | 3549 | goto new_owner; |
1da177e4 | 3550 | } |
dad1c067 | 3551 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3552 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3553 | release_openowner(oo); |
3554 | open->op_openowner = NULL; | |
bcf130f9 | 3555 | goto new_owner; |
0f442aa2 | 3556 | } |
4cdc951b BF |
3557 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3558 | if (status) | |
3559 | return status; | |
4cdc951b | 3560 | goto alloc_stateid; |
bcf130f9 | 3561 | new_owner: |
13d6f66b | 3562 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3563 | if (oo == NULL) |
3564 | return nfserr_jukebox; | |
3565 | open->op_openowner = oo; | |
4cdc951b | 3566 | alloc_stateid: |
b49e084d | 3567 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3568 | if (!open->op_stp) |
3569 | return nfserr_jukebox; | |
0f442aa2 | 3570 | return nfs_ok; |
1da177e4 LT |
3571 | } |
3572 | ||
b37ad28b | 3573 | static inline __be32 |
4a6e43e6 N |
3574 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3575 | { | |
3576 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3577 | return nfserr_openmode; | |
3578 | else | |
3579 | return nfs_ok; | |
3580 | } | |
3581 | ||
f459e453 | 3582 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3583 | { |
f459e453 | 3584 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3585 | } |
3586 | ||
38c2f4b1 | 3587 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3588 | { |
f459e453 | 3589 | struct nfs4_stid *ret; |
24a0111e | 3590 | |
38c2f4b1 | 3591 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3592 | if (!ret) |
3593 | return NULL; | |
3594 | return delegstateid(ret); | |
24a0111e BF |
3595 | } |
3596 | ||
8b289b2c BF |
3597 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3598 | { | |
3599 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3600 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3601 | } | |
3602 | ||
b37ad28b | 3603 | static __be32 |
41d22663 | 3604 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3605 | struct nfs4_delegation **dp) |
3606 | { | |
3607 | int flags; | |
b37ad28b | 3608 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3609 | struct nfs4_delegation *deleg; |
567d9829 | 3610 | |
dcd94cc2 TM |
3611 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3612 | if (deleg == NULL) | |
c44c5eeb | 3613 | goto out; |
24a0111e | 3614 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3615 | status = nfs4_check_delegmode(deleg, flags); |
3616 | if (status) { | |
3617 | nfs4_put_stid(&deleg->dl_stid); | |
3618 | goto out; | |
3619 | } | |
3620 | *dp = deleg; | |
c44c5eeb | 3621 | out: |
8b289b2c | 3622 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3623 | return nfs_ok; |
3624 | if (status) | |
3625 | return status; | |
dad1c067 | 3626 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3627 | return nfs_ok; |
567d9829 N |
3628 | } |
3629 | ||
a46cb7f2 JL |
3630 | static struct nfs4_ol_stateid * |
3631 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3632 | { |
a46cb7f2 | 3633 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3634 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3635 | |
1d31a253 | 3636 | spin_lock(&fp->fi_lock); |
8beefa24 | 3637 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3638 | /* ignore lock owners */ |
3639 | if (local->st_stateowner->so_is_open_owner == 0) | |
3640 | continue; | |
baeb4ff0 | 3641 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3642 | ret = local; |
d6f2bc5d | 3643 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3644 | break; |
1d31a253 | 3645 | } |
1da177e4 | 3646 | } |
1d31a253 | 3647 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3648 | return ret; |
1da177e4 LT |
3649 | } |
3650 | ||
21fb4016 BF |
3651 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3652 | { | |
3653 | int flags = 0; | |
3654 | ||
3655 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3656 | flags |= NFSD_MAY_READ; | |
3657 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3658 | flags |= NFSD_MAY_WRITE; | |
3659 | return flags; | |
3660 | } | |
3661 | ||
7e6a72e5 CH |
3662 | static inline __be32 |
3663 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3664 | struct nfsd4_open *open) | |
3665 | { | |
3666 | struct iattr iattr = { | |
3667 | .ia_valid = ATTR_SIZE, | |
3668 | .ia_size = 0, | |
3669 | }; | |
3670 | if (!open->op_truncate) | |
3671 | return 0; | |
3672 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3673 | return nfserr_inval; | |
3674 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3675 | } | |
3676 | ||
0c12eaff | 3677 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3678 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3679 | struct nfsd4_open *open) | |
f9d7562f | 3680 | { |
de18643d | 3681 | struct file *filp = NULL; |
f9d7562f | 3682 | __be32 status; |
0c12eaff CB |
3683 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3684 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3685 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3686 | |
de18643d | 3687 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3688 | |
3689 | /* | |
3690 | * Are we trying to set a deny mode that would conflict with | |
3691 | * current access? | |
3692 | */ | |
3693 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3694 | if (status != nfs_ok) { | |
3695 | spin_unlock(&fp->fi_lock); | |
3696 | goto out; | |
3697 | } | |
3698 | ||
3699 | /* set access to the file */ | |
3700 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3701 | if (status != nfs_ok) { | |
3702 | spin_unlock(&fp->fi_lock); | |
3703 | goto out; | |
3704 | } | |
3705 | ||
3706 | /* Set access bits in stateid */ | |
3707 | old_access_bmap = stp->st_access_bmap; | |
3708 | set_access(open->op_share_access, stp); | |
3709 | ||
3710 | /* Set new deny mask */ | |
3711 | old_deny_bmap = stp->st_deny_bmap; | |
3712 | set_deny(open->op_share_deny, stp); | |
3713 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3714 | ||
f9d7562f | 3715 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3716 | spin_unlock(&fp->fi_lock); |
3717 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3718 | if (status) |
baeb4ff0 | 3719 | goto out_put_access; |
de18643d TM |
3720 | spin_lock(&fp->fi_lock); |
3721 | if (!fp->fi_fds[oflag]) { | |
3722 | fp->fi_fds[oflag] = filp; | |
3723 | filp = NULL; | |
3724 | } | |
f9d7562f | 3725 | } |
de18643d TM |
3726 | spin_unlock(&fp->fi_lock); |
3727 | if (filp) | |
3728 | fput(filp); | |
f9d7562f | 3729 | |
7e6a72e5 CH |
3730 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3731 | if (status) | |
3732 | goto out_put_access; | |
7e6a72e5 CH |
3733 | out: |
3734 | return status; | |
baeb4ff0 JL |
3735 | out_put_access: |
3736 | stp->st_access_bmap = old_access_bmap; | |
3737 | nfs4_file_put_access(fp, open->op_share_access); | |
3738 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3739 | goto out; | |
1da177e4 LT |
3740 | } |
3741 | ||
b37ad28b | 3742 | static __be32 |
dcef0413 | 3743 | 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 | 3744 | { |
b37ad28b | 3745 | __be32 status; |
baeb4ff0 | 3746 | unsigned char old_deny_bmap; |
1da177e4 | 3747 | |
6eb3a1d0 | 3748 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3749 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3750 | |
baeb4ff0 JL |
3751 | /* test and set deny mode */ |
3752 | spin_lock(&fp->fi_lock); | |
3753 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3754 | if (status == nfs_ok) { | |
3755 | old_deny_bmap = stp->st_deny_bmap; | |
3756 | set_deny(open->op_share_deny, stp); | |
3757 | fp->fi_share_deny |= | |
3758 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3759 | } | |
3760 | spin_unlock(&fp->fi_lock); | |
3761 | ||
3762 | if (status != nfs_ok) | |
1da177e4 | 3763 | return status; |
1da177e4 | 3764 | |
baeb4ff0 JL |
3765 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3766 | if (status != nfs_ok) | |
3767 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3768 | return status; | |
3769 | } | |
1da177e4 | 3770 | |
1da177e4 | 3771 | static void |
1255a8f3 | 3772 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3773 | { |
dad1c067 | 3774 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3775 | } |
3776 | ||
14a24e99 BF |
3777 | /* Should we give out recallable state?: */ |
3778 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3779 | { | |
3780 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3781 | return true; | |
3782 | /* | |
3783 | * In the sessions case, since we don't have to establish a | |
3784 | * separate connection for callbacks, we assume it's OK | |
3785 | * until we hear otherwise: | |
3786 | */ | |
3787 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3788 | } | |
3789 | ||
d564fbec | 3790 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3791 | { |
3792 | struct file_lock *fl; | |
3793 | ||
3794 | fl = locks_alloc_lock(); | |
3795 | if (!fl) | |
3796 | return NULL; | |
3797 | locks_init_lock(fl); | |
3798 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3799 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3800 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3801 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3802 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3803 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3804 | return fl; |
3805 | } | |
3806 | ||
99c41515 | 3807 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3808 | { |
11b9164a | 3809 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3810 | struct file_lock *fl; |
417c6629 JL |
3811 | struct file *filp; |
3812 | int status = 0; | |
edab9782 | 3813 | |
d564fbec | 3814 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3815 | if (!fl) |
3816 | return -ENOMEM; | |
417c6629 JL |
3817 | filp = find_readable_file(fp); |
3818 | if (!filp) { | |
3819 | /* We should always have a readable file here */ | |
3820 | WARN_ON_ONCE(1); | |
3821 | return -EBADF; | |
3822 | } | |
3823 | fl->fl_file = filp; | |
3824 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3825 | if (status) { | |
3826 | locks_free_lock(fl); | |
3827 | goto out_fput; | |
3828 | } | |
3829 | spin_lock(&state_lock); | |
3830 | spin_lock(&fp->fi_lock); | |
3831 | /* Did the lease get broken before we took the lock? */ | |
3832 | status = -EAGAIN; | |
3833 | if (fp->fi_had_conflict) | |
3834 | goto out_unlock; | |
3835 | /* Race breaker */ | |
3836 | if (fp->fi_lease) { | |
3837 | status = 0; | |
3838 | atomic_inc(&fp->fi_delegees); | |
3839 | hash_delegation_locked(dp, fp); | |
3840 | goto out_unlock; | |
3841 | } | |
acfdf5c3 | 3842 | fp->fi_lease = fl; |
417c6629 | 3843 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3844 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3845 | hash_delegation_locked(dp, fp); |
417c6629 | 3846 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3847 | spin_unlock(&state_lock); |
acfdf5c3 | 3848 | return 0; |
417c6629 JL |
3849 | out_unlock: |
3850 | spin_unlock(&fp->fi_lock); | |
3851 | spin_unlock(&state_lock); | |
3852 | out_fput: | |
3853 | fput(filp); | |
e873088f | 3854 | return status; |
acfdf5c3 BF |
3855 | } |
3856 | ||
0b26693c JL |
3857 | static struct nfs4_delegation * |
3858 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3859 | struct nfs4_file *fp) | |
acfdf5c3 | 3860 | { |
0b26693c JL |
3861 | int status; |
3862 | struct nfs4_delegation *dp; | |
417c6629 | 3863 | |
bf7bd3e9 | 3864 | if (fp->fi_had_conflict) |
0b26693c JL |
3865 | return ERR_PTR(-EAGAIN); |
3866 | ||
3867 | dp = alloc_init_deleg(clp, fh); | |
3868 | if (!dp) | |
3869 | return ERR_PTR(-ENOMEM); | |
3870 | ||
bf7bd3e9 | 3871 | get_nfs4_file(fp); |
417c6629 JL |
3872 | spin_lock(&state_lock); |
3873 | spin_lock(&fp->fi_lock); | |
11b9164a | 3874 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3875 | if (!fp->fi_lease) { |
3876 | spin_unlock(&fp->fi_lock); | |
3877 | spin_unlock(&state_lock); | |
0b26693c JL |
3878 | status = nfs4_setlease(dp); |
3879 | goto out; | |
417c6629 | 3880 | } |
cbf7a75b | 3881 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3882 | if (fp->fi_had_conflict) { |
417c6629 JL |
3883 | status = -EAGAIN; |
3884 | goto out_unlock; | |
acfdf5c3 | 3885 | } |
931ee56c | 3886 | hash_delegation_locked(dp, fp); |
0b26693c | 3887 | status = 0; |
417c6629 JL |
3888 | out_unlock: |
3889 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3890 | spin_unlock(&state_lock); |
0b26693c JL |
3891 | out: |
3892 | if (status) { | |
6011695d | 3893 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3894 | return ERR_PTR(status); |
3895 | } | |
3896 | return dp; | |
edab9782 BF |
3897 | } |
3898 | ||
4aa8913c BH |
3899 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3900 | { | |
3901 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3902 | if (status == -EAGAIN) | |
3903 | open->op_why_no_deleg = WND4_CONTENTION; | |
3904 | else { | |
3905 | open->op_why_no_deleg = WND4_RESOURCE; | |
3906 | switch (open->op_deleg_want) { | |
3907 | case NFS4_SHARE_WANT_READ_DELEG: | |
3908 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3909 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3910 | break; | |
3911 | case NFS4_SHARE_WANT_CANCEL: | |
3912 | open->op_why_no_deleg = WND4_CANCELLED; | |
3913 | break; | |
3914 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3915 | WARN_ON_ONCE(1); |
4aa8913c BH |
3916 | } |
3917 | } | |
3918 | } | |
3919 | ||
1da177e4 LT |
3920 | /* |
3921 | * Attempt to hand out a delegation. | |
99c41515 BF |
3922 | * |
3923 | * Note we don't support write delegations, and won't until the vfs has | |
3924 | * proper support for them. | |
1da177e4 LT |
3925 | */ |
3926 | static void | |
4cf59221 JL |
3927 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3928 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3929 | { |
3930 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3931 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3932 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3933 | int cb_up; |
99c41515 | 3934 | int status = 0; |
1da177e4 | 3935 | |
fe0750e5 | 3936 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3937 | open->op_recall = 0; |
3938 | switch (open->op_claim_type) { | |
3939 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3940 | if (!cb_up) |
7b190fec | 3941 | open->op_recall = 1; |
99c41515 BF |
3942 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3943 | goto out_no_deleg; | |
7b190fec N |
3944 | break; |
3945 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3946 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3947 | /* |
3948 | * Let's not give out any delegations till everyone's | |
3949 | * had the chance to reclaim theirs.... | |
3950 | */ | |
4cf59221 | 3951 | if (locks_in_grace(clp->net)) |
99c41515 | 3952 | goto out_no_deleg; |
dad1c067 | 3953 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3954 | goto out_no_deleg; |
9a0590ae SD |
3955 | /* |
3956 | * Also, if the file was opened for write or | |
3957 | * create, there's a good chance the client's | |
3958 | * about to write to it, resulting in an | |
3959 | * immediate recall (since we don't support | |
3960 | * write delegations): | |
3961 | */ | |
7b190fec | 3962 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3963 | goto out_no_deleg; |
3964 | if (open->op_create == NFS4_OPEN_CREATE) | |
3965 | goto out_no_deleg; | |
7b190fec N |
3966 | break; |
3967 | default: | |
99c41515 | 3968 | goto out_no_deleg; |
7b190fec | 3969 | } |
11b9164a | 3970 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3971 | if (IS_ERR(dp)) |
dd239cc0 | 3972 | goto out_no_deleg; |
1da177e4 | 3973 | |
d5477a8d | 3974 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3975 | |
8c10cbdb | 3976 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3977 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3978 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3979 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3980 | return; |
dd239cc0 | 3981 | out_no_deleg: |
99c41515 BF |
3982 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3983 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3984 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3985 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3986 | open->op_recall = 1; |
3987 | } | |
99c41515 BF |
3988 | |
3989 | /* 4.1 client asking for a delegation? */ | |
3990 | if (open->op_deleg_want) | |
3991 | nfsd4_open_deleg_none_ext(open, status); | |
3992 | return; | |
1da177e4 LT |
3993 | } |
3994 | ||
e27f49c3 BH |
3995 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3996 | struct nfs4_delegation *dp) | |
3997 | { | |
3998 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3999 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4000 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4001 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
4002 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
4003 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
4004 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4005 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
4006 | } | |
4007 | /* Otherwise the client must be confused wanting a delegation | |
4008 | * it already has, therefore we don't return | |
4009 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
4010 | */ | |
4011 | } | |
4012 | ||
1da177e4 LT |
4013 | /* |
4014 | * called with nfs4_lock_state() held. | |
4015 | */ | |
b37ad28b | 4016 | __be32 |
1da177e4 LT |
4017 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
4018 | { | |
6668958f | 4019 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 4020 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 4021 | struct nfs4_file *fp = NULL; |
dcef0413 | 4022 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 4023 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 4024 | __be32 status; |
1da177e4 | 4025 | |
1da177e4 LT |
4026 | /* |
4027 | * Lookup file; if found, lookup stateid and check open request, | |
4028 | * and check for delegations in the process of being recalled. | |
4029 | * If not found, create the nfs4_file struct | |
4030 | */ | |
f9c00c3a | 4031 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 4032 | if (fp != open->op_file) { |
41d22663 | 4033 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
4034 | if (status) |
4035 | goto out; | |
a46cb7f2 | 4036 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 4037 | } else { |
950e0118 | 4038 | open->op_file = NULL; |
c44c5eeb | 4039 | status = nfserr_bad_stateid; |
8b289b2c | 4040 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4041 | goto out; |
3e772463 | 4042 | status = nfserr_jukebox; |
1da177e4 LT |
4043 | } |
4044 | ||
4045 | /* | |
4046 | * OPEN the file, or upgrade an existing OPEN. | |
4047 | * If truncate fails, the OPEN fails. | |
4048 | */ | |
4049 | if (stp) { | |
4050 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4051 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4052 | if (status) |
4053 | goto out; | |
4054 | } else { | |
4cdc951b BF |
4055 | stp = open->op_stp; |
4056 | open->op_stp = NULL; | |
996e0938 | 4057 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4058 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4059 | if (status) { | |
4060 | release_open_stateid(stp); | |
4061 | goto out; | |
4062 | } | |
1da177e4 | 4063 | } |
dcef0413 BF |
4064 | update_stateid(&stp->st_stid.sc_stateid); |
4065 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4066 | |
d24433cd | 4067 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4068 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4069 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4070 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4071 | goto nodeleg; | |
4072 | } | |
4073 | } | |
4074 | ||
1da177e4 LT |
4075 | /* |
4076 | * Attempt to hand out a delegation. No error return, because the | |
4077 | * OPEN succeeds even if we fail. | |
4078 | */ | |
4cf59221 | 4079 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4080 | nodeleg: |
1da177e4 LT |
4081 | status = nfs_ok; |
4082 | ||
8c10cbdb | 4083 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4084 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4085 | out: |
d24433cd BH |
4086 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4087 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4088 | open->op_deleg_want) |
4089 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4090 | |
13cd2184 N |
4091 | if (fp) |
4092 | put_nfs4_file(fp); | |
37515177 | 4093 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4094 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4095 | /* |
4096 | * To finish the open response, we just need to set the rflags. | |
4097 | */ | |
4098 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4099 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4100 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4101 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4102 | if (dp) |
4103 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4104 | if (stp) |
4105 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4106 | |
4107 | return status; | |
4108 | } | |
4109 | ||
58fb12e6 JL |
4110 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
4111 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
4112 | { |
4113 | if (open->op_openowner) { | |
d3134b10 JL |
4114 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4115 | ||
4116 | nfsd4_cstate_assign_replay(cstate, so); | |
4117 | nfs4_put_stateowner(so); | |
d29b20cd | 4118 | } |
32513b40 BF |
4119 | if (open->op_file) |
4120 | nfsd4_free_file(open->op_file); | |
4cdc951b | 4121 | if (open->op_stp) |
6011695d | 4122 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
4123 | } |
4124 | ||
b37ad28b | 4125 | __be32 |
b591480b BF |
4126 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4127 | clientid_t *clid) | |
1da177e4 LT |
4128 | { |
4129 | struct nfs4_client *clp; | |
b37ad28b | 4130 | __be32 status; |
7f2210fa | 4131 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4132 | |
4133 | nfs4_lock_state(); | |
4134 | dprintk("process_renew(%08x/%08x): starting\n", | |
4135 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4136 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4137 | if (status) |
1da177e4 | 4138 | goto out; |
4b24ca7d | 4139 | clp = cstate->clp; |
1da177e4 | 4140 | status = nfserr_cb_path_down; |
ea1da636 | 4141 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4142 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4143 | goto out; |
4144 | status = nfs_ok; | |
4145 | out: | |
4146 | nfs4_unlock_state(); | |
4147 | return status; | |
4148 | } | |
4149 | ||
a76b4319 | 4150 | static void |
12760c66 | 4151 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4152 | { |
33dcc481 | 4153 | /* do nothing if grace period already ended */ |
a51c84ed | 4154 | if (nn->grace_ended) |
33dcc481 JL |
4155 | return; |
4156 | ||
a76b4319 | 4157 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4158 | nn->grace_ended = true; |
12760c66 | 4159 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4160 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4161 | /* |
4162 | * Now that every NFSv4 client has had the chance to recover and | |
4163 | * to see the (possibly new, possibly shorter) lease time, we | |
4164 | * can safely set the next grace time to the current lease time: | |
4165 | */ | |
5284b44e | 4166 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4167 | } |
4168 | ||
fd39ca9a | 4169 | static time_t |
09121281 | 4170 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4171 | { |
4172 | struct nfs4_client *clp; | |
fe0750e5 | 4173 | struct nfs4_openowner *oo; |
1da177e4 | 4174 | struct nfs4_delegation *dp; |
217526e7 | 4175 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4176 | struct list_head *pos, *next, reaplist; |
3d733711 | 4177 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4178 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
4179 | |
4180 | nfs4_lock_state(); | |
4181 | ||
4182 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 4183 | nfsd4_end_grace(nn); |
36acb66b | 4184 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4185 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4186 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4187 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4188 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4189 | t = clp->cl_time - cutoff; | |
a832e7ae | 4190 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4191 | break; |
4192 | } | |
221a6876 | 4193 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4194 | dprintk("NFSD: client in use (clientid %08x)\n", |
4195 | clp->cl_clientid.cl_id); | |
4196 | continue; | |
4197 | } | |
4864af97 | 4198 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4199 | } |
c9a49628 | 4200 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4201 | list_for_each_safe(pos, next, &reaplist) { |
4202 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4203 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4204 | clp->cl_clientid.cl_id); | |
4864af97 | 4205 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4206 | expire_client(clp); |
4207 | } | |
cdc97505 | 4208 | spin_lock(&state_lock); |
e8c69d17 | 4209 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4210 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4211 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4212 | continue; | |
1da177e4 | 4213 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4214 | t = dp->dl_time - cutoff; |
4215 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4216 | break; |
4217 | } | |
42690676 JL |
4218 | unhash_delegation_locked(dp); |
4219 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4220 | } |
cdc97505 | 4221 | spin_unlock(&state_lock); |
2d4a532d JL |
4222 | while (!list_empty(&reaplist)) { |
4223 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4224 | dl_recall_lru); | |
4225 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4226 | revoke_delegation(dp); |
1da177e4 | 4227 | } |
217526e7 JL |
4228 | |
4229 | spin_lock(&nn->client_lock); | |
4230 | while (!list_empty(&nn->close_lru)) { | |
4231 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4232 | oo_close_lru); | |
4233 | if (time_after((unsigned long)oo->oo_time, | |
4234 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4235 | t = oo->oo_time - cutoff; |
4236 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4237 | break; |
4238 | } | |
217526e7 JL |
4239 | list_del_init(&oo->oo_close_lru); |
4240 | stp = oo->oo_last_closed_stid; | |
4241 | oo->oo_last_closed_stid = NULL; | |
4242 | spin_unlock(&nn->client_lock); | |
4243 | nfs4_put_stid(&stp->st_stid); | |
4244 | spin_lock(&nn->client_lock); | |
1da177e4 | 4245 | } |
217526e7 JL |
4246 | spin_unlock(&nn->client_lock); |
4247 | ||
a832e7ae | 4248 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4249 | nfs4_unlock_state(); |
a832e7ae | 4250 | return new_timeo; |
1da177e4 LT |
4251 | } |
4252 | ||
a254b246 HH |
4253 | static struct workqueue_struct *laundry_wq; |
4254 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4255 | |
4256 | static void | |
09121281 | 4257 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4258 | { |
4259 | time_t t; | |
09121281 SK |
4260 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4261 | work); | |
4262 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4263 | laundromat_work); | |
1da177e4 | 4264 | |
09121281 | 4265 | t = nfs4_laundromat(nn); |
1da177e4 | 4266 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4267 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4268 | } |
4269 | ||
f7a4d872 | 4270 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4271 | { |
11b9164a | 4272 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4273 | return nfserr_bad_stateid; |
4274 | return nfs_ok; | |
1da177e4 LT |
4275 | } |
4276 | ||
1da177e4 | 4277 | static inline int |
82c5ff1b | 4278 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4279 | { |
82c5ff1b JL |
4280 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4281 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4282 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4283 | } |
4284 | ||
4285 | static inline int | |
82c5ff1b | 4286 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4287 | { |
82c5ff1b JL |
4288 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4289 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4290 | } |
4291 | ||
4292 | static | |
dcef0413 | 4293 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4294 | { |
b37ad28b | 4295 | __be32 status = nfserr_openmode; |
1da177e4 | 4296 | |
02921914 BF |
4297 | /* For lock stateid's, we test the parent open, not the lock: */ |
4298 | if (stp->st_openstp) | |
4299 | stp = stp->st_openstp; | |
82c5ff1b | 4300 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4301 | goto out; |
82c5ff1b | 4302 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4303 | goto out; |
4304 | status = nfs_ok; | |
4305 | out: | |
4306 | return status; | |
4307 | } | |
4308 | ||
b37ad28b | 4309 | static inline __be32 |
5ccb0066 | 4310 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4311 | { |
203a8c8e | 4312 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4313 | return nfs_ok; |
5ccb0066 | 4314 | else if (locks_in_grace(net)) { |
25985edc | 4315 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4316 | * conflicting state; so we must wait out the grace period. */ |
4317 | return nfserr_grace; | |
4318 | } else if (flags & WR_STATE) | |
4319 | return nfs4_share_conflict(current_fh, | |
4320 | NFS4_SHARE_DENY_WRITE); | |
4321 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4322 | return nfs4_share_conflict(current_fh, | |
4323 | NFS4_SHARE_DENY_READ); | |
4324 | } | |
4325 | ||
4326 | /* | |
4327 | * Allow READ/WRITE during grace period on recovered state only for files | |
4328 | * that are not able to provide mandatory locking. | |
4329 | */ | |
4330 | static inline int | |
5ccb0066 | 4331 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4332 | { |
5ccb0066 | 4333 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4334 | } |
4335 | ||
81b82965 BF |
4336 | /* Returns true iff a is later than b: */ |
4337 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4338 | { | |
1a9357f4 | 4339 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4340 | } |
4341 | ||
57b7b43b | 4342 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4343 | { |
6668958f AA |
4344 | /* |
4345 | * When sessions are used the stateid generation number is ignored | |
4346 | * when it is zero. | |
4347 | */ | |
28dde241 | 4348 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4349 | return nfs_ok; |
4350 | ||
4351 | if (in->si_generation == ref->si_generation) | |
4352 | return nfs_ok; | |
6668958f | 4353 | |
0836f587 | 4354 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4355 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4356 | return nfserr_bad_stateid; |
4357 | /* | |
81b82965 BF |
4358 | * However, we could see a stateid from the past, even from a |
4359 | * non-buggy client. For example, if the client sends a lock | |
4360 | * while some IO is outstanding, the lock may bump si_generation | |
4361 | * while the IO is still in flight. The client could avoid that | |
4362 | * situation by waiting for responses on all the IO requests, | |
4363 | * but better performance may result in retrying IO that | |
4364 | * receives an old_stateid error if requests are rarely | |
4365 | * reordered in flight: | |
0836f587 | 4366 | */ |
81b82965 | 4367 | return nfserr_old_stateid; |
0836f587 BF |
4368 | } |
4369 | ||
7df302f7 | 4370 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4371 | { |
97b7e3b6 BF |
4372 | struct nfs4_stid *s; |
4373 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4374 | __be32 status = nfserr_bad_stateid; |
17456804 | 4375 | |
7df302f7 | 4376 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4377 | return status; |
7df302f7 CL |
4378 | /* Client debugging aid. */ |
4379 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4380 | char addr_str[INET6_ADDRSTRLEN]; | |
4381 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4382 | sizeof(addr_str)); | |
4383 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4384 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4385 | return status; |
7df302f7 | 4386 | } |
1af71cc8 JL |
4387 | spin_lock(&cl->cl_lock); |
4388 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4389 | if (!s) |
1af71cc8 | 4390 | goto out_unlock; |
36279ac1 | 4391 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4392 | if (status) |
1af71cc8 | 4393 | goto out_unlock; |
23340032 BF |
4394 | switch (s->sc_type) { |
4395 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4396 | status = nfs_ok; |
4397 | break; | |
3bd64a5b | 4398 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4399 | status = nfserr_deleg_revoked; |
4400 | break; | |
23340032 BF |
4401 | case NFS4_OPEN_STID: |
4402 | case NFS4_LOCK_STID: | |
4403 | ols = openlockstateid(s); | |
4404 | if (ols->st_stateowner->so_is_open_owner | |
4405 | && !(openowner(ols->st_stateowner)->oo_flags | |
4406 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4407 | status = nfserr_bad_stateid; |
4408 | else | |
4409 | status = nfs_ok; | |
4410 | break; | |
23340032 BF |
4411 | default: |
4412 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4413 | /* Fallthrough */ |
23340032 | 4414 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4415 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4416 | status = nfserr_bad_stateid; |
23340032 | 4417 | } |
1af71cc8 JL |
4418 | out_unlock: |
4419 | spin_unlock(&cl->cl_lock); | |
4420 | return status; | |
17456804 BS |
4421 | } |
4422 | ||
2dd6e458 TM |
4423 | static __be32 |
4424 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4425 | stateid_t *stateid, unsigned char typemask, | |
4426 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4427 | { |
0eb6f20a | 4428 | __be32 status; |
38c2f4b1 BF |
4429 | |
4430 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4431 | return nfserr_bad_stateid; | |
4b24ca7d | 4432 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4433 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4434 | if (cstate->session) |
a8a7c677 | 4435 | return nfserr_bad_stateid; |
38c2f4b1 | 4436 | return nfserr_stale_stateid; |
a8a7c677 | 4437 | } |
0eb6f20a BF |
4438 | if (status) |
4439 | return status; | |
4b24ca7d | 4440 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4441 | if (!*s) |
4442 | return nfserr_bad_stateid; | |
4443 | return nfs_ok; | |
38c2f4b1 BF |
4444 | } |
4445 | ||
1da177e4 LT |
4446 | /* |
4447 | * Checks for stateid operations | |
4448 | */ | |
b37ad28b | 4449 | __be32 |
5ccb0066 | 4450 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4451 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4452 | { |
69064a27 | 4453 | struct nfs4_stid *s; |
dcef0413 | 4454 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4455 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4456 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4457 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4458 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4459 | struct file *file = NULL; |
b37ad28b | 4460 | __be32 status; |
1da177e4 | 4461 | |
1da177e4 LT |
4462 | if (filpp) |
4463 | *filpp = NULL; | |
4464 | ||
5ccb0066 | 4465 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4466 | return nfserr_grace; |
4467 | ||
4468 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4469 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4470 | |
14bcab1a TM |
4471 | nfs4_lock_state(); |
4472 | ||
2dd6e458 | 4473 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4474 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4475 | &s, nn); |
38c2f4b1 | 4476 | if (status) |
fd911011 | 4477 | goto unlock_state; |
69064a27 BF |
4478 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4479 | if (status) | |
4480 | goto out; | |
f7a4d872 BF |
4481 | switch (s->sc_type) { |
4482 | case NFS4_DELEG_STID: | |
69064a27 | 4483 | dp = delegstateid(s); |
dc9bf700 BF |
4484 | status = nfs4_check_delegmode(dp, flags); |
4485 | if (status) | |
4486 | goto out; | |
43b0178e | 4487 | if (filpp) { |
11b9164a | 4488 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4489 | if (!file) { |
063b0fb9 BF |
4490 | WARN_ON_ONCE(1); |
4491 | status = nfserr_serverfault; | |
4492 | goto out; | |
4493 | } | |
de18643d | 4494 | get_file(file); |
43b0178e | 4495 | } |
f7a4d872 BF |
4496 | break; |
4497 | case NFS4_OPEN_STID: | |
4498 | case NFS4_LOCK_STID: | |
69064a27 | 4499 | stp = openlockstateid(s); |
f7a4d872 BF |
4500 | status = nfs4_check_fh(current_fh, stp); |
4501 | if (status) | |
1da177e4 | 4502 | goto out; |
fe0750e5 | 4503 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4504 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4505 | goto out; |
a4455be0 BF |
4506 | status = nfs4_check_openmode(stp, flags); |
4507 | if (status) | |
1da177e4 | 4508 | goto out; |
f9d7562f | 4509 | if (filpp) { |
11b9164a TM |
4510 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4511 | ||
f9d7562f | 4512 | if (flags & RD_STATE) |
11b9164a | 4513 | file = find_readable_file(fp); |
f9d7562f | 4514 | else |
11b9164a | 4515 | file = find_writeable_file(fp); |
f9d7562f | 4516 | } |
f7a4d872 BF |
4517 | break; |
4518 | default: | |
14bcab1a TM |
4519 | status = nfserr_bad_stateid; |
4520 | goto out; | |
1da177e4 LT |
4521 | } |
4522 | status = nfs_ok; | |
14bcab1a | 4523 | if (file) |
de18643d | 4524 | *filpp = file; |
1da177e4 | 4525 | out: |
fd911011 TM |
4526 | nfs4_put_stid(s); |
4527 | unlock_state: | |
14bcab1a | 4528 | nfs4_unlock_state(); |
1da177e4 LT |
4529 | return status; |
4530 | } | |
4531 | ||
17456804 BS |
4532 | /* |
4533 | * Test if the stateid is valid | |
4534 | */ | |
4535 | __be32 | |
4536 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4537 | struct nfsd4_test_stateid *test_stateid) | |
4538 | { | |
03cfb420 BS |
4539 | struct nfsd4_test_stateid_id *stateid; |
4540 | struct nfs4_client *cl = cstate->session->se_client; | |
4541 | ||
4542 | nfs4_lock_state(); | |
4543 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4544 | stateid->ts_id_status = |
4545 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4546 | nfs4_unlock_state(); |
4547 | ||
17456804 BS |
4548 | return nfs_ok; |
4549 | } | |
4550 | ||
e1ca12df BS |
4551 | __be32 |
4552 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4553 | struct nfsd4_free_stateid *free_stateid) | |
4554 | { | |
4555 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4556 | struct nfs4_stid *s; |
3bd64a5b | 4557 | struct nfs4_delegation *dp; |
fc5a96c3 | 4558 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4559 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4560 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4561 | |
4562 | nfs4_lock_state(); | |
1af71cc8 JL |
4563 | spin_lock(&cl->cl_lock); |
4564 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4565 | if (!s) |
1af71cc8 | 4566 | goto out_unlock; |
2da1cec7 BF |
4567 | switch (s->sc_type) { |
4568 | case NFS4_DELEG_STID: | |
e1ca12df | 4569 | ret = nfserr_locks_held; |
1af71cc8 | 4570 | break; |
2da1cec7 | 4571 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4572 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4573 | if (ret) | |
1af71cc8 JL |
4574 | break; |
4575 | ret = nfserr_locks_held; | |
f7a4d872 | 4576 | break; |
1af71cc8 JL |
4577 | case NFS4_LOCK_STID: |
4578 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4579 | if (ret) | |
4580 | break; | |
fc5a96c3 JL |
4581 | stp = openlockstateid(s); |
4582 | ret = nfserr_locks_held; | |
4583 | if (check_for_locks(stp->st_stid.sc_file, | |
4584 | lockowner(stp->st_stateowner))) | |
4585 | break; | |
4586 | unhash_lock_stateid(stp); | |
1af71cc8 | 4587 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4588 | nfs4_put_stid(s); |
4589 | ret = nfs_ok; | |
1af71cc8 | 4590 | goto out; |
3bd64a5b BF |
4591 | case NFS4_REVOKED_DELEG_STID: |
4592 | dp = delegstateid(s); | |
2d4a532d JL |
4593 | list_del_init(&dp->dl_recall_lru); |
4594 | spin_unlock(&cl->cl_lock); | |
6011695d | 4595 | nfs4_put_stid(s); |
3bd64a5b | 4596 | ret = nfs_ok; |
1af71cc8 JL |
4597 | goto out; |
4598 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4599 | } |
1af71cc8 JL |
4600 | out_unlock: |
4601 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4602 | out: |
4603 | nfs4_unlock_state(); | |
4604 | return ret; | |
4605 | } | |
4606 | ||
4c4cd222 N |
4607 | static inline int |
4608 | setlkflg (int type) | |
4609 | { | |
4610 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4611 | RD_STATE : WR_STATE; | |
4612 | } | |
1da177e4 | 4613 | |
dcef0413 | 4614 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4615 | { |
4616 | struct svc_fh *current_fh = &cstate->current_fh; | |
4617 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4618 | __be32 status; | |
4619 | ||
c0a5d93e BF |
4620 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4621 | if (status) | |
4622 | return status; | |
3bd64a5b BF |
4623 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4624 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4625 | /* |
4626 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4627 | * nfserr_replay_me from the previous step, and |
4628 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4629 | */ |
4630 | return nfserr_bad_stateid; | |
4631 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4632 | if (status) | |
4633 | return status; | |
4634 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4635 | } |
4636 | ||
1da177e4 LT |
4637 | /* |
4638 | * Checks for sequence id mutating operations. | |
4639 | */ | |
b37ad28b | 4640 | static __be32 |
dd453dfd | 4641 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4642 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4643 | struct nfs4_ol_stateid **stpp, |
4644 | struct nfsd_net *nn) | |
1da177e4 | 4645 | { |
0836f587 | 4646 | __be32 status; |
38c2f4b1 | 4647 | struct nfs4_stid *s; |
e17f99b7 | 4648 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4649 | |
8c10cbdb BH |
4650 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4651 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4652 | |
1da177e4 | 4653 | *stpp = NULL; |
2dd6e458 | 4654 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4655 | if (status) |
4656 | return status; | |
e17f99b7 | 4657 | stp = openlockstateid(s); |
58fb12e6 | 4658 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4659 | |
e17f99b7 | 4660 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4661 | if (!status) |
e17f99b7 | 4662 | *stpp = stp; |
fd911011 TM |
4663 | else |
4664 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4665 | return status; |
c0a5d93e | 4666 | } |
39325bd0 | 4667 | |
3320fef1 SK |
4668 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4669 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4670 | { |
4671 | __be32 status; | |
4672 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4673 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4674 | |
c0a5d93e | 4675 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4676 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4677 | if (status) |
4678 | return status; | |
4cbfc9f7 TM |
4679 | oo = openowner(stp->st_stateowner); |
4680 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4681 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4682 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4683 | } |
4684 | *stpp = stp; | |
3a4f98bb | 4685 | return nfs_ok; |
1da177e4 LT |
4686 | } |
4687 | ||
b37ad28b | 4688 | __be32 |
ca364317 | 4689 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4690 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4691 | { |
b37ad28b | 4692 | __be32 status; |
fe0750e5 | 4693 | struct nfs4_openowner *oo; |
dcef0413 | 4694 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4695 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4696 | |
a6a9f18f AV |
4697 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4698 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4699 | |
ca364317 | 4700 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4701 | if (status) |
4702 | return status; | |
1da177e4 LT |
4703 | |
4704 | nfs4_lock_state(); | |
4705 | ||
9072d5c6 | 4706 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4707 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4708 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4709 | if (status) |
68b66e82 | 4710 | goto out; |
fe0750e5 | 4711 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4712 | status = nfserr_bad_stateid; |
dad1c067 | 4713 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4714 | goto put_stateid; |
dad1c067 | 4715 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4716 | update_stateid(&stp->st_stid.sc_stateid); |
4717 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4718 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4719 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4720 | |
2a4317c5 | 4721 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4722 | status = nfs_ok; |
2585fc79 TM |
4723 | put_stateid: |
4724 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4725 | out: |
9411b1d4 | 4726 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4727 | nfs4_unlock_state(); |
1da177e4 LT |
4728 | return status; |
4729 | } | |
4730 | ||
6409a5a6 | 4731 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4732 | { |
82c5ff1b | 4733 | if (!test_access(access, stp)) |
6409a5a6 | 4734 | return; |
11b9164a | 4735 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4736 | clear_access(access, stp); |
6409a5a6 | 4737 | } |
f197c271 | 4738 | |
6409a5a6 BF |
4739 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4740 | { | |
4741 | switch (to_access) { | |
4742 | case NFS4_SHARE_ACCESS_READ: | |
4743 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4744 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4745 | break; | |
4746 | case NFS4_SHARE_ACCESS_WRITE: | |
4747 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4748 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4749 | break; | |
4750 | case NFS4_SHARE_ACCESS_BOTH: | |
4751 | break; | |
4752 | default: | |
063b0fb9 | 4753 | WARN_ON_ONCE(1); |
1da177e4 LT |
4754 | } |
4755 | } | |
4756 | ||
b37ad28b | 4757 | __be32 |
ca364317 BF |
4758 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4759 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4760 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4761 | { |
b37ad28b | 4762 | __be32 status; |
dcef0413 | 4763 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4764 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4765 | |
a6a9f18f AV |
4766 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4767 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4768 | |
c30e92df | 4769 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4770 | if (od->od_deleg_want) |
4771 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4772 | od->od_deleg_want); | |
1da177e4 LT |
4773 | |
4774 | nfs4_lock_state(); | |
c0a5d93e | 4775 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4776 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4777 | if (status) |
1da177e4 | 4778 | goto out; |
1da177e4 | 4779 | status = nfserr_inval; |
82c5ff1b | 4780 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4781 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4782 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4783 | goto put_stateid; |
1da177e4 | 4784 | } |
ce0fc43c | 4785 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4786 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4787 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4788 | goto put_stateid; |
1da177e4 | 4789 | } |
6409a5a6 | 4790 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4791 | |
ce0fc43c | 4792 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4793 | |
dcef0413 BF |
4794 | update_stateid(&stp->st_stid.sc_stateid); |
4795 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4796 | status = nfs_ok; |
0667b1e9 TM |
4797 | put_stateid: |
4798 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4799 | out: |
9411b1d4 | 4800 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4801 | nfs4_unlock_state(); |
1da177e4 LT |
4802 | return status; |
4803 | } | |
4804 | ||
f7a4d872 BF |
4805 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4806 | { | |
acf9295b | 4807 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4808 | LIST_HEAD(reaplist); |
acf9295b | 4809 | |
f7a4d872 | 4810 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4811 | spin_lock(&clp->cl_lock); |
d83017f9 | 4812 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4813 | |
d83017f9 JL |
4814 | if (clp->cl_minorversion) { |
4815 | put_ol_stateid_locked(s, &reaplist); | |
4816 | spin_unlock(&clp->cl_lock); | |
4817 | free_ol_stateid_reaplist(&reaplist); | |
4818 | } else { | |
4819 | spin_unlock(&clp->cl_lock); | |
4820 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4821 | move_to_close_lru(s, clp->net); |
d83017f9 | 4822 | } |
38c387b5 BF |
4823 | } |
4824 | ||
1da177e4 LT |
4825 | /* |
4826 | * nfs4_unlock_state() called after encode | |
4827 | */ | |
b37ad28b | 4828 | __be32 |
ca364317 | 4829 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4830 | struct nfsd4_close *close) |
1da177e4 | 4831 | { |
b37ad28b | 4832 | __be32 status; |
dcef0413 | 4833 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4834 | struct net *net = SVC_NET(rqstp); |
4835 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4836 | |
a6a9f18f AV |
4837 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4838 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4839 | |
4840 | nfs4_lock_state(); | |
f7a4d872 BF |
4841 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4842 | &close->cl_stateid, | |
4843 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4844 | &stp, nn); |
9411b1d4 | 4845 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4846 | if (status) |
1da177e4 | 4847 | goto out; |
dcef0413 BF |
4848 | update_stateid(&stp->st_stid.sc_stateid); |
4849 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4850 | |
f7a4d872 | 4851 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4852 | |
4853 | /* put reference from nfs4_preprocess_seqid_op */ | |
4854 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4855 | out: |
58fb12e6 | 4856 | nfs4_unlock_state(); |
1da177e4 LT |
4857 | return status; |
4858 | } | |
4859 | ||
b37ad28b | 4860 | __be32 |
ca364317 BF |
4861 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4862 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4863 | { |
203a8c8e BF |
4864 | struct nfs4_delegation *dp; |
4865 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4866 | struct nfs4_stid *s; |
b37ad28b | 4867 | __be32 status; |
3320fef1 | 4868 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4869 | |
ca364317 | 4870 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4871 | return status; |
1da177e4 LT |
4872 | |
4873 | nfs4_lock_state(); | |
2dd6e458 | 4874 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4875 | if (status) |
203a8c8e | 4876 | goto out; |
38c2f4b1 | 4877 | dp = delegstateid(s); |
d5477a8d | 4878 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4879 | if (status) |
fd911011 | 4880 | goto put_stateid; |
203a8c8e | 4881 | |
3bd64a5b | 4882 | destroy_delegation(dp); |
fd911011 TM |
4883 | put_stateid: |
4884 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4885 | out: |
203a8c8e BF |
4886 | nfs4_unlock_state(); |
4887 | ||
1da177e4 LT |
4888 | return status; |
4889 | } | |
4890 | ||
4891 | ||
1da177e4 | 4892 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4893 | |
87df4de8 BH |
4894 | static inline u64 |
4895 | end_offset(u64 start, u64 len) | |
4896 | { | |
4897 | u64 end; | |
4898 | ||
4899 | end = start + len; | |
4900 | return end >= start ? end: NFS4_MAX_UINT64; | |
4901 | } | |
4902 | ||
4903 | /* last octet in a range */ | |
4904 | static inline u64 | |
4905 | last_byte_offset(u64 start, u64 len) | |
4906 | { | |
4907 | u64 end; | |
4908 | ||
063b0fb9 | 4909 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4910 | end = start + len; |
4911 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4912 | } | |
4913 | ||
1da177e4 LT |
4914 | /* |
4915 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4916 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4917 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4918 | * locking, this prevents us from being completely protocol-compliant. The | |
4919 | * real solution to this problem is to start using unsigned file offsets in | |
4920 | * the VFS, but this is a very deep change! | |
4921 | */ | |
4922 | static inline void | |
4923 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4924 | { | |
4925 | if (lock->fl_start < 0) | |
4926 | lock->fl_start = OFFSET_MAX; | |
4927 | if (lock->fl_end < 0) | |
4928 | lock->fl_end = OFFSET_MAX; | |
4929 | } | |
4930 | ||
d5b9026a N |
4931 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4932 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4933 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4934 | }; |
1da177e4 LT |
4935 | |
4936 | static inline void | |
4937 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4938 | { | |
fe0750e5 | 4939 | struct nfs4_lockowner *lo; |
1da177e4 | 4940 | |
d5b9026a | 4941 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4942 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4943 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4944 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4945 | if (!deny->ld_owner.data) |
4946 | /* We just don't care that much */ | |
4947 | goto nevermind; | |
fe0750e5 BF |
4948 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4949 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4950 | } else { |
7c13f344 BF |
4951 | nevermind: |
4952 | deny->ld_owner.len = 0; | |
4953 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4954 | deny->ld_clientid.cl_boot = 0; |
4955 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4956 | } |
4957 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4958 | deny->ld_length = NFS4_MAX_UINT64; |
4959 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4960 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4961 | deny->ld_type = NFS4_READ_LT; | |
4962 | if (fl->fl_type != F_RDLCK) | |
4963 | deny->ld_type = NFS4_WRITE_LT; | |
4964 | } | |
4965 | ||
fe0750e5 | 4966 | static struct nfs4_lockowner * |
c58c6610 | 4967 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4968 | struct nfs4_client *clp) |
1da177e4 | 4969 | { |
d4f0489f | 4970 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4971 | struct nfs4_stateowner *so; |
1da177e4 | 4972 | |
0a880a28 TM |
4973 | lockdep_assert_held(&clp->cl_lock); |
4974 | ||
d4f0489f TM |
4975 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4976 | so_strhash) { | |
b3c32bcd TM |
4977 | if (so->so_is_open_owner) |
4978 | continue; | |
d4f0489f | 4979 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4980 | continue; |
5db1c03f | 4981 | atomic_inc(&so->so_count); |
b3c32bcd | 4982 | return lockowner(so); |
1da177e4 LT |
4983 | } |
4984 | return NULL; | |
4985 | } | |
4986 | ||
c58c6610 TM |
4987 | static struct nfs4_lockowner * |
4988 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4989 | struct nfs4_client *clp) |
c58c6610 TM |
4990 | { |
4991 | struct nfs4_lockowner *lo; | |
4992 | ||
d4f0489f TM |
4993 | spin_lock(&clp->cl_lock); |
4994 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4995 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4996 | return lo; |
4997 | } | |
4998 | ||
8f4b54c5 JL |
4999 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
5000 | { | |
c58c6610 | 5001 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
5002 | } |
5003 | ||
6b180f0b JL |
5004 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
5005 | { | |
5006 | struct nfs4_lockowner *lo = lockowner(sop); | |
5007 | ||
5008 | kmem_cache_free(lockowner_slab, lo); | |
5009 | } | |
5010 | ||
5011 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
5012 | .so_unhash = nfs4_unhash_lockowner, |
5013 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
5014 | }; |
5015 | ||
1da177e4 LT |
5016 | /* |
5017 | * Alloc a lock owner structure. | |
5018 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 5019 | * occurred. |
1da177e4 | 5020 | * |
16bfdaaf | 5021 | * strhashval = ownerstr_hashval |
1da177e4 | 5022 | */ |
fe0750e5 | 5023 | static struct nfs4_lockowner * |
c58c6610 TM |
5024 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
5025 | struct nfs4_ol_stateid *open_stp, | |
5026 | struct nfsd4_lock *lock) | |
5027 | { | |
c58c6610 | 5028 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 5029 | |
fe0750e5 BF |
5030 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
5031 | if (!lo) | |
1da177e4 | 5032 | return NULL; |
fe0750e5 BF |
5033 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
5034 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 5035 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 5036 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 5037 | spin_lock(&clp->cl_lock); |
c58c6610 | 5038 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 5039 | &lock->lk_new_owner, clp); |
c58c6610 TM |
5040 | if (ret == NULL) { |
5041 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 5042 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
5043 | ret = lo; |
5044 | } else | |
5045 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 5046 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 5047 | return lo; |
1da177e4 LT |
5048 | } |
5049 | ||
356a95ec JL |
5050 | static void |
5051 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
5052 | struct nfs4_file *fp, struct inode *inode, | |
5053 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 5054 | { |
d3b313a4 | 5055 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 5056 | |
356a95ec JL |
5057 | lockdep_assert_held(&clp->cl_lock); |
5058 | ||
3d0fabd5 | 5059 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 5060 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 5061 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 5062 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 5063 | get_nfs4_file(fp); |
11b9164a | 5064 | stp->st_stid.sc_file = fp; |
b49e084d | 5065 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5066 | stp->st_access_bmap = 0; |
1da177e4 | 5067 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5068 | stp->st_openstp = open_stp; |
3c87b9b7 | 5069 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5070 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5071 | spin_lock(&fp->fi_lock); |
5072 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5073 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5074 | } |
5075 | ||
c53530da JL |
5076 | static struct nfs4_ol_stateid * |
5077 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5078 | { | |
5079 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5080 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5081 | ||
5082 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5083 | |
5084 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5085 | if (lst->st_stid.sc_file == fp) { |
5086 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5087 | return lst; |
3d0fabd5 | 5088 | } |
c53530da JL |
5089 | } |
5090 | return NULL; | |
5091 | } | |
5092 | ||
356a95ec JL |
5093 | static struct nfs4_ol_stateid * |
5094 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5095 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5096 | bool *new) | |
5097 | { | |
5098 | struct nfs4_stid *ns = NULL; | |
5099 | struct nfs4_ol_stateid *lst; | |
5100 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5101 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5102 | ||
5103 | spin_lock(&clp->cl_lock); | |
5104 | lst = find_lock_stateid(lo, fi); | |
5105 | if (lst == NULL) { | |
5106 | spin_unlock(&clp->cl_lock); | |
5107 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5108 | if (ns == NULL) | |
5109 | return NULL; | |
5110 | ||
5111 | spin_lock(&clp->cl_lock); | |
5112 | lst = find_lock_stateid(lo, fi); | |
5113 | if (likely(!lst)) { | |
5114 | lst = openlockstateid(ns); | |
5115 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5116 | ns = NULL; | |
5117 | *new = true; | |
5118 | } | |
5119 | } | |
5120 | spin_unlock(&clp->cl_lock); | |
5121 | if (ns) | |
5122 | nfs4_put_stid(ns); | |
5123 | return lst; | |
5124 | } | |
c53530da | 5125 | |
fd39ca9a | 5126 | static int |
1da177e4 LT |
5127 | check_lock_length(u64 offset, u64 length) |
5128 | { | |
87df4de8 | 5129 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5130 | LOFF_OVERFLOW(offset, length))); |
5131 | } | |
5132 | ||
dcef0413 | 5133 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5134 | { |
11b9164a | 5135 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5136 | |
7214e860 JL |
5137 | lockdep_assert_held(&fp->fi_lock); |
5138 | ||
82c5ff1b | 5139 | if (test_access(access, lock_stp)) |
0997b173 | 5140 | return; |
12659651 | 5141 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5142 | set_access(access, lock_stp); |
0997b173 BF |
5143 | } |
5144 | ||
356a95ec JL |
5145 | static __be32 |
5146 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5147 | struct nfs4_ol_stateid *ost, | |
5148 | struct nfsd4_lock *lock, | |
5149 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5150 | { |
5db1c03f | 5151 | __be32 status; |
11b9164a | 5152 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5153 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5154 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5155 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5156 | struct nfs4_lockowner *lo; |
5157 | unsigned int strhashval; | |
5158 | ||
d4f0489f | 5159 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5160 | if (!lo) { |
d4f0489f | 5161 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5162 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5163 | if (lo == NULL) | |
5164 | return nfserr_jukebox; | |
5165 | } else { | |
5166 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5167 | status = nfserr_bad_seqid; |
c53530da JL |
5168 | if (!cstate->minorversion && |
5169 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5170 | goto out; |
64a284d0 | 5171 | } |
c53530da | 5172 | |
356a95ec | 5173 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5174 | if (*lst == NULL) { |
5db1c03f JL |
5175 | status = nfserr_jukebox; |
5176 | goto out; | |
64a284d0 | 5177 | } |
5db1c03f JL |
5178 | status = nfs_ok; |
5179 | out: | |
5180 | nfs4_put_stateowner(&lo->lo_owner); | |
5181 | return status; | |
64a284d0 BF |
5182 | } |
5183 | ||
1da177e4 LT |
5184 | /* |
5185 | * LOCK operation | |
5186 | */ | |
b37ad28b | 5187 | __be32 |
ca364317 | 5188 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5189 | struct nfsd4_lock *lock) |
1da177e4 | 5190 | { |
fe0750e5 BF |
5191 | struct nfs4_openowner *open_sop = NULL; |
5192 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5193 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5194 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5195 | struct nfs4_file *fp; |
7d947842 | 5196 | struct file *filp = NULL; |
21179d81 JL |
5197 | struct file_lock *file_lock = NULL; |
5198 | struct file_lock *conflock = NULL; | |
b37ad28b | 5199 | __be32 status = 0; |
b34f27aa | 5200 | int lkflg; |
b8dd7b9a | 5201 | int err; |
5db1c03f | 5202 | bool new = false; |
3320fef1 SK |
5203 | struct net *net = SVC_NET(rqstp); |
5204 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5205 | |
5206 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5207 | (long long) lock->lk_offset, | |
5208 | (long long) lock->lk_length); | |
5209 | ||
1da177e4 LT |
5210 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5211 | return nfserr_inval; | |
5212 | ||
ca364317 | 5213 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5214 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5215 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5216 | return status; | |
5217 | } | |
5218 | ||
1da177e4 LT |
5219 | nfs4_lock_state(); |
5220 | ||
5221 | if (lock->lk_is_new) { | |
684e5638 BF |
5222 | if (nfsd4_has_session(cstate)) |
5223 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5224 | memcpy(&lock->v.new.clientid, | |
5225 | &cstate->session->se_client->cl_clientid, | |
5226 | sizeof(clientid_t)); | |
5227 | ||
1da177e4 | 5228 | status = nfserr_stale_clientid; |
2c142baa | 5229 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5230 | goto out; |
1da177e4 | 5231 | |
1da177e4 | 5232 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5233 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5234 | lock->lk_new_open_seqid, |
5235 | &lock->lk_new_open_stateid, | |
3320fef1 | 5236 | &open_stp, nn); |
37515177 | 5237 | if (status) |
1da177e4 | 5238 | goto out; |
fe0750e5 | 5239 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5240 | status = nfserr_bad_stateid; |
684e5638 | 5241 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5242 | &lock->v.new.clientid)) |
5243 | goto out; | |
64a284d0 | 5244 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5245 | &lock_stp, &new); |
3d0fabd5 | 5246 | } else { |
dd453dfd | 5247 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5248 | lock->lk_old_lock_seqid, |
5249 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5250 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5251 | } |
e1aaa891 BF |
5252 | if (status) |
5253 | goto out; | |
64a284d0 | 5254 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5255 | |
b34f27aa BF |
5256 | lkflg = setlkflg(lock->lk_type); |
5257 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5258 | if (status) | |
5259 | goto out; | |
5260 | ||
0dd395dc | 5261 | status = nfserr_grace; |
3320fef1 | 5262 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5263 | goto out; |
5264 | status = nfserr_no_grace; | |
3320fef1 | 5265 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5266 | goto out; |
5267 | ||
21179d81 JL |
5268 | file_lock = locks_alloc_lock(); |
5269 | if (!file_lock) { | |
5270 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5271 | status = nfserr_jukebox; | |
5272 | goto out; | |
5273 | } | |
5274 | ||
11b9164a | 5275 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5276 | locks_init_lock(file_lock); |
1da177e4 LT |
5277 | switch (lock->lk_type) { |
5278 | case NFS4_READ_LT: | |
5279 | case NFS4_READW_LT: | |
7214e860 JL |
5280 | spin_lock(&fp->fi_lock); |
5281 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5282 | if (filp) |
5283 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5284 | spin_unlock(&fp->fi_lock); |
21179d81 | 5285 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5286 | break; |
1da177e4 LT |
5287 | case NFS4_WRITE_LT: |
5288 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5289 | spin_lock(&fp->fi_lock); |
5290 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5291 | if (filp) |
5292 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5293 | spin_unlock(&fp->fi_lock); |
21179d81 | 5294 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5295 | break; |
1da177e4 LT |
5296 | default: |
5297 | status = nfserr_inval; | |
5298 | goto out; | |
5299 | } | |
f9d7562f BF |
5300 | if (!filp) { |
5301 | status = nfserr_openmode; | |
5302 | goto out; | |
5303 | } | |
21179d81 JL |
5304 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5305 | file_lock->fl_pid = current->tgid; | |
5306 | file_lock->fl_file = filp; | |
5307 | file_lock->fl_flags = FL_POSIX; | |
5308 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5309 | file_lock->fl_start = lock->lk_offset; | |
5310 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5311 | nfs4_transform_lock_offset(file_lock); | |
5312 | ||
5313 | conflock = locks_alloc_lock(); | |
5314 | if (!conflock) { | |
5315 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5316 | status = nfserr_jukebox; | |
5317 | goto out; | |
5318 | } | |
1da177e4 | 5319 | |
21179d81 | 5320 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5321 | switch (-err) { |
1da177e4 | 5322 | case 0: /* success! */ |
dcef0413 BF |
5323 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5324 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5325 | sizeof(stateid_t)); |
b8dd7b9a | 5326 | status = 0; |
eb76b3fd AA |
5327 | break; |
5328 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5329 | status = nfserr_denied; | |
5330 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5331 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5332 | break; |
1da177e4 LT |
5333 | case (EDEADLK): |
5334 | status = nfserr_deadlock; | |
eb76b3fd | 5335 | break; |
3e772463 | 5336 | default: |
fd85b817 | 5337 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5338 | status = nfserrno(err); |
eb76b3fd | 5339 | break; |
1da177e4 | 5340 | } |
1da177e4 | 5341 | out: |
de18643d TM |
5342 | if (filp) |
5343 | fput(filp); | |
5db1c03f JL |
5344 | if (lock_stp) { |
5345 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5346 | if (cstate->replay_owner && | |
5347 | cstate->replay_owner != &lock_sop->lo_owner && | |
5348 | seqid_mutating_err(ntohl(status))) | |
5349 | lock_sop->lo_owner.so_seqid++; | |
5350 | ||
5351 | /* | |
5352 | * If this is a new, never-before-used stateid, and we are | |
5353 | * returning an error, then just go ahead and release it. | |
5354 | */ | |
5355 | if (status && new) | |
5356 | release_lock_stateid(lock_stp); | |
5357 | ||
3d0fabd5 | 5358 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5359 | } |
0667b1e9 TM |
5360 | if (open_stp) |
5361 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5362 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5363 | nfs4_unlock_state(); |
21179d81 JL |
5364 | if (file_lock) |
5365 | locks_free_lock(file_lock); | |
5366 | if (conflock) | |
5367 | locks_free_lock(conflock); | |
1da177e4 LT |
5368 | return status; |
5369 | } | |
5370 | ||
55ef1274 BF |
5371 | /* |
5372 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5373 | * so we do a temporary open here just to get an open file to pass to | |
5374 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5375 | * inode operation.) | |
5376 | */ | |
04da6e9d | 5377 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5378 | { |
5379 | struct file *file; | |
04da6e9d AV |
5380 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5381 | if (!err) { | |
5382 | err = nfserrno(vfs_test_lock(file, lock)); | |
5383 | nfsd_close(file); | |
5384 | } | |
55ef1274 BF |
5385 | return err; |
5386 | } | |
5387 | ||
1da177e4 LT |
5388 | /* |
5389 | * LOCKT operation | |
5390 | */ | |
b37ad28b | 5391 | __be32 |
ca364317 BF |
5392 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5393 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5394 | { |
21179d81 | 5395 | struct file_lock *file_lock = NULL; |
5db1c03f | 5396 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5397 | __be32 status; |
7f2210fa | 5398 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5399 | |
5ccb0066 | 5400 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5401 | return nfserr_grace; |
5402 | ||
5403 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5404 | return nfserr_inval; | |
5405 | ||
1da177e4 LT |
5406 | nfs4_lock_state(); |
5407 | ||
9b2ef62b | 5408 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5409 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5410 | if (status) |
5411 | goto out; | |
5412 | } | |
1da177e4 | 5413 | |
75c096f7 | 5414 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5415 | goto out; |
1da177e4 | 5416 | |
21179d81 JL |
5417 | file_lock = locks_alloc_lock(); |
5418 | if (!file_lock) { | |
5419 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5420 | status = nfserr_jukebox; | |
5421 | goto out; | |
5422 | } | |
5423 | locks_init_lock(file_lock); | |
1da177e4 LT |
5424 | switch (lockt->lt_type) { |
5425 | case NFS4_READ_LT: | |
5426 | case NFS4_READW_LT: | |
21179d81 | 5427 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5428 | break; |
5429 | case NFS4_WRITE_LT: | |
5430 | case NFS4_WRITEW_LT: | |
21179d81 | 5431 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5432 | break; |
5433 | default: | |
2fdada03 | 5434 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5435 | status = nfserr_inval; |
5436 | goto out; | |
5437 | } | |
5438 | ||
d4f0489f TM |
5439 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5440 | cstate->clp); | |
fe0750e5 | 5441 | if (lo) |
21179d81 JL |
5442 | file_lock->fl_owner = (fl_owner_t)lo; |
5443 | file_lock->fl_pid = current->tgid; | |
5444 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5445 | |
21179d81 JL |
5446 | file_lock->fl_start = lockt->lt_offset; |
5447 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5448 | |
21179d81 | 5449 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5450 | |
21179d81 | 5451 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5452 | if (status) |
fd85b817 | 5453 | goto out; |
04da6e9d | 5454 | |
21179d81 | 5455 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5456 | status = nfserr_denied; |
21179d81 | 5457 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5458 | } |
5459 | out: | |
5db1c03f JL |
5460 | if (lo) |
5461 | nfs4_put_stateowner(&lo->lo_owner); | |
1da177e4 | 5462 | nfs4_unlock_state(); |
21179d81 JL |
5463 | if (file_lock) |
5464 | locks_free_lock(file_lock); | |
1da177e4 LT |
5465 | return status; |
5466 | } | |
5467 | ||
b37ad28b | 5468 | __be32 |
ca364317 | 5469 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5470 | struct nfsd4_locku *locku) |
1da177e4 | 5471 | { |
dcef0413 | 5472 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5473 | struct file *filp = NULL; |
21179d81 | 5474 | struct file_lock *file_lock = NULL; |
b37ad28b | 5475 | __be32 status; |
b8dd7b9a | 5476 | int err; |
3320fef1 SK |
5477 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5478 | ||
1da177e4 LT |
5479 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5480 | (long long) locku->lu_offset, | |
5481 | (long long) locku->lu_length); | |
5482 | ||
5483 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5484 | return nfserr_inval; | |
5485 | ||
5486 | nfs4_lock_state(); | |
5487 | ||
9072d5c6 | 5488 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5489 | &locku->lu_stateid, NFS4_LOCK_STID, |
5490 | &stp, nn); | |
9072d5c6 | 5491 | if (status) |
1da177e4 | 5492 | goto out; |
11b9164a | 5493 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5494 | if (!filp) { |
5495 | status = nfserr_lock_range; | |
858cc573 | 5496 | goto put_stateid; |
f9d7562f | 5497 | } |
21179d81 JL |
5498 | file_lock = locks_alloc_lock(); |
5499 | if (!file_lock) { | |
5500 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5501 | status = nfserr_jukebox; | |
de18643d | 5502 | goto fput; |
21179d81 JL |
5503 | } |
5504 | locks_init_lock(file_lock); | |
5505 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5506 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5507 | file_lock->fl_pid = current->tgid; |
5508 | file_lock->fl_file = filp; | |
5509 | file_lock->fl_flags = FL_POSIX; | |
5510 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5511 | file_lock->fl_start = locku->lu_offset; | |
5512 | ||
5513 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5514 | locku->lu_length); | |
5515 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5516 | |
21179d81 | 5517 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5518 | if (err) { |
fd85b817 | 5519 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5520 | goto out_nfserr; |
5521 | } | |
dcef0413 BF |
5522 | update_stateid(&stp->st_stid.sc_stateid); |
5523 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5524 | fput: |
5525 | fput(filp); | |
858cc573 TM |
5526 | put_stateid: |
5527 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5528 | out: |
9411b1d4 | 5529 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5530 | nfs4_unlock_state(); |
21179d81 JL |
5531 | if (file_lock) |
5532 | locks_free_lock(file_lock); | |
1da177e4 LT |
5533 | return status; |
5534 | ||
5535 | out_nfserr: | |
b8dd7b9a | 5536 | status = nfserrno(err); |
de18643d | 5537 | goto fput; |
1da177e4 LT |
5538 | } |
5539 | ||
5540 | /* | |
5541 | * returns | |
f9c00c3a JL |
5542 | * true: locks held by lockowner |
5543 | * false: no locks held by lockowner | |
1da177e4 | 5544 | */ |
f9c00c3a JL |
5545 | static bool |
5546 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5547 | { |
5548 | struct file_lock **flpp; | |
f9c00c3a JL |
5549 | int status = false; |
5550 | struct file *filp = find_any_file(fp); | |
5551 | struct inode *inode; | |
5552 | ||
5553 | if (!filp) { | |
5554 | /* Any valid lock stateid should have some sort of access */ | |
5555 | WARN_ON_ONCE(1); | |
5556 | return status; | |
5557 | } | |
5558 | ||
5559 | inode = file_inode(filp); | |
1da177e4 | 5560 | |
1c8c601a | 5561 | spin_lock(&inode->i_lock); |
1da177e4 | 5562 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5563 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5564 | status = true; |
5565 | break; | |
796dadfd | 5566 | } |
1da177e4 | 5567 | } |
1c8c601a | 5568 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5569 | fput(filp); |
1da177e4 LT |
5570 | return status; |
5571 | } | |
5572 | ||
b37ad28b | 5573 | __be32 |
b591480b BF |
5574 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5575 | struct nfsd4_compound_state *cstate, | |
5576 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5577 | { |
5578 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5579 | struct nfs4_stateowner *sop; |
5580 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5581 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5582 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5583 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5584 | __be32 status; |
7f2210fa | 5585 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5586 | struct nfs4_client *clp; |
1da177e4 LT |
5587 | |
5588 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5589 | clid->cl_boot, clid->cl_id); | |
5590 | ||
1da177e4 LT |
5591 | nfs4_lock_state(); |
5592 | ||
4b24ca7d | 5593 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5594 | if (status) |
5595 | goto out; | |
5596 | ||
d4f0489f | 5597 | clp = cstate->clp; |
fd44907c | 5598 | /* Find the matching lock stateowner */ |
d4f0489f | 5599 | spin_lock(&clp->cl_lock); |
882e9d25 | 5600 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5601 | so_strhash) { |
fd44907c | 5602 | |
882e9d25 JL |
5603 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5604 | continue; | |
fd44907c | 5605 | |
882e9d25 JL |
5606 | /* see if there are still any locks associated with it */ |
5607 | lo = lockowner(sop); | |
5608 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5609 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5610 | status = nfserr_locks_held; | |
5611 | spin_unlock(&clp->cl_lock); | |
5612 | goto out; | |
5613 | } | |
5adfd885 | 5614 | } |
882e9d25 JL |
5615 | |
5616 | atomic_inc(&sop->so_count); | |
5617 | break; | |
1da177e4 | 5618 | } |
c58c6610 | 5619 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5620 | if (lo) |
5621 | release_lockowner(lo); | |
1da177e4 LT |
5622 | out: |
5623 | nfs4_unlock_state(); | |
5624 | return status; | |
5625 | } | |
5626 | ||
5627 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5628 | alloc_reclaim(void) |
1da177e4 | 5629 | { |
a55370a3 | 5630 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5631 | } |
5632 | ||
0ce0c2b5 | 5633 | bool |
52e19c09 | 5634 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5635 | { |
0ce0c2b5 | 5636 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5637 | |
52e19c09 | 5638 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5639 | return (crp && crp->cr_clp); |
c7b9a459 N |
5640 | } |
5641 | ||
1da177e4 LT |
5642 | /* |
5643 | * failure => all reset bets are off, nfserr_no_grace... | |
5644 | */ | |
772a9bbb | 5645 | struct nfs4_client_reclaim * |
52e19c09 | 5646 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5647 | { |
5648 | unsigned int strhashval; | |
772a9bbb | 5649 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5650 | |
a55370a3 N |
5651 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5652 | crp = alloc_reclaim(); | |
772a9bbb JL |
5653 | if (crp) { |
5654 | strhashval = clientstr_hashval(name); | |
5655 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5656 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5657 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5658 | crp->cr_clp = NULL; |
52e19c09 | 5659 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5660 | } |
5661 | return crp; | |
1da177e4 LT |
5662 | } |
5663 | ||
ce30e539 | 5664 | void |
52e19c09 | 5665 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5666 | { |
5667 | list_del(&crp->cr_strhash); | |
5668 | kfree(crp); | |
52e19c09 | 5669 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5670 | } |
5671 | ||
2a4317c5 | 5672 | void |
52e19c09 | 5673 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5674 | { |
5675 | struct nfs4_client_reclaim *crp = NULL; | |
5676 | int i; | |
5677 | ||
1da177e4 | 5678 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5679 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5680 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5681 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5682 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5683 | } |
5684 | } | |
063b0fb9 | 5685 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5686 | } |
5687 | ||
5688 | /* | |
5689 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5690 | struct nfs4_client_reclaim * |
52e19c09 | 5691 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5692 | { |
5693 | unsigned int strhashval; | |
1da177e4 LT |
5694 | struct nfs4_client_reclaim *crp = NULL; |
5695 | ||
278c931c | 5696 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5697 | |
278c931c | 5698 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5699 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5700 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5701 | return crp; |
5702 | } | |
5703 | } | |
5704 | return NULL; | |
5705 | } | |
5706 | ||
5707 | /* | |
5708 | * Called from OPEN. Look for clientid in reclaim list. | |
5709 | */ | |
b37ad28b | 5710 | __be32 |
0fe492db TM |
5711 | nfs4_check_open_reclaim(clientid_t *clid, |
5712 | struct nfsd4_compound_state *cstate, | |
5713 | struct nfsd_net *nn) | |
1da177e4 | 5714 | { |
0fe492db | 5715 | __be32 status; |
a52d726b JL |
5716 | |
5717 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5718 | status = lookup_clientid(clid, cstate, nn); |
5719 | if (status) | |
a52d726b JL |
5720 | return nfserr_reclaim_bad; |
5721 | ||
0fe492db TM |
5722 | if (nfsd4_client_record_check(cstate->clp)) |
5723 | return nfserr_reclaim_bad; | |
5724 | ||
5725 | return nfs_ok; | |
1da177e4 LT |
5726 | } |
5727 | ||
65178db4 BS |
5728 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5729 | ||
44e34da6 BS |
5730 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5731 | { | |
d20c11d8 JL |
5732 | __be32 ret; |
5733 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
5734 | ||
5735 | spin_lock(&nn->client_lock); | |
5736 | ret = mark_client_expired_locked(clp); | |
5737 | spin_unlock(&nn->client_lock); | |
5738 | if (ret != nfs_ok) | |
221a6876 | 5739 | return 0; |
44e34da6 BS |
5740 | expire_client(clp); |
5741 | return 1; | |
5742 | } | |
5743 | ||
184c1847 BS |
5744 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5745 | { | |
5746 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5747 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5748 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5749 | return 1; | |
5750 | } | |
5751 | ||
5752 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5753 | const char *type) | |
5754 | { | |
5755 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5756 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5757 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5758 | } | |
5759 | ||
3c87b9b7 TM |
5760 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5761 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5762 | { |
5763 | struct nfs4_openowner *oop; | |
fc29171f | 5764 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5765 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5766 | u64 count = 0; |
5767 | ||
5768 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5769 | list_for_each_entry_safe(stp, st_next, |
5770 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5771 | list_for_each_entry_safe(lst, lst_next, | |
5772 | &stp->st_locks, st_locks) { | |
fc29171f | 5773 | if (func) |
3c87b9b7 | 5774 | func(lst); |
fc29171f BS |
5775 | if (++count == max) |
5776 | return count; | |
5777 | } | |
5778 | } | |
5779 | } | |
5780 | ||
5781 | return count; | |
5782 | } | |
5783 | ||
5784 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5785 | { | |
3c87b9b7 | 5786 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5787 | } |
5788 | ||
184c1847 BS |
5789 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5790 | { | |
5791 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5792 | nfsd_print_count(clp, count, "locked files"); | |
5793 | return count; | |
5794 | } | |
5795 | ||
4dbdbda8 BS |
5796 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5797 | { | |
5798 | struct nfs4_openowner *oop, *next; | |
5799 | u64 count = 0; | |
5800 | ||
5801 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5802 | if (func) | |
5803 | func(oop); | |
5804 | if (++count == max) | |
5805 | break; | |
5806 | } | |
5807 | ||
5808 | return count; | |
5809 | } | |
5810 | ||
5811 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5812 | { | |
5813 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5814 | } | |
5815 | ||
184c1847 BS |
5816 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5817 | { | |
5818 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5819 | nfsd_print_count(clp, count, "open files"); | |
5820 | return count; | |
5821 | } | |
5822 | ||
269de30f BS |
5823 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5824 | struct list_head *victims) | |
5825 | { | |
5826 | struct nfs4_delegation *dp, *next; | |
5827 | u64 count = 0; | |
5828 | ||
cdc97505 | 5829 | lockdep_assert_held(&state_lock); |
269de30f | 5830 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5831 | if (victims) { |
5832 | /* | |
5833 | * It's not safe to mess with delegations that have a | |
5834 | * non-zero dl_time. They might have already been broken | |
5835 | * and could be processed by the laundromat outside of | |
5836 | * the state_lock. Just leave them be. | |
5837 | */ | |
5838 | if (dp->dl_time != 0) | |
5839 | continue; | |
5840 | ||
42690676 JL |
5841 | unhash_delegation_locked(dp); |
5842 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5843 | } |
269de30f BS |
5844 | if (++count == max) |
5845 | break; | |
5846 | } | |
5847 | return count; | |
5848 | } | |
5849 | ||
5850 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5851 | { | |
5852 | struct nfs4_delegation *dp, *next; | |
5853 | LIST_HEAD(victims); | |
5854 | u64 count; | |
5855 | ||
cdc97505 | 5856 | spin_lock(&state_lock); |
269de30f | 5857 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5858 | spin_unlock(&state_lock); |
269de30f | 5859 | |
2d4a532d JL |
5860 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5861 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5862 | revoke_delegation(dp); |
2d4a532d | 5863 | } |
269de30f BS |
5864 | |
5865 | return count; | |
5866 | } | |
5867 | ||
5868 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5869 | { | |
dff1399f | 5870 | struct nfs4_delegation *dp; |
269de30f BS |
5871 | LIST_HEAD(victims); |
5872 | u64 count; | |
5873 | ||
cdc97505 | 5874 | spin_lock(&state_lock); |
269de30f | 5875 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5876 | while (!list_empty(&victims)) { |
5877 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5878 | dl_recall_lru); | |
5879 | list_del_init(&dp->dl_recall_lru); | |
5880 | dp->dl_time = 0; | |
269de30f | 5881 | nfsd_break_one_deleg(dp); |
dff1399f | 5882 | } |
cdc97505 | 5883 | spin_unlock(&state_lock); |
269de30f BS |
5884 | |
5885 | return count; | |
5886 | } | |
5887 | ||
184c1847 BS |
5888 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5889 | { | |
5890 | u64 count = 0; | |
5891 | ||
cdc97505 | 5892 | spin_lock(&state_lock); |
184c1847 | 5893 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5894 | spin_unlock(&state_lock); |
184c1847 BS |
5895 | |
5896 | nfsd_print_count(clp, count, "delegations"); | |
5897 | return count; | |
5898 | } | |
5899 | ||
44e34da6 | 5900 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5901 | { |
5902 | struct nfs4_client *clp, *next; | |
44e34da6 | 5903 | u64 count = 0; |
3320fef1 | 5904 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5905 | |
44e34da6 BS |
5906 | if (!nfsd_netns_ready(nn)) |
5907 | return 0; | |
5908 | ||
5ed58bb2 | 5909 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5910 | count += func(clp, max - count); |
5911 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5912 | break; |
5913 | } | |
65178db4 | 5914 | |
44e34da6 BS |
5915 | return count; |
5916 | } | |
5917 | ||
6c1e82a4 BS |
5918 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5919 | { | |
5920 | struct nfs4_client *clp; | |
5921 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5922 | ||
5923 | if (!nfsd_netns_ready(nn)) | |
5924 | return NULL; | |
5925 | ||
5926 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5927 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5928 | return clp; | |
5929 | } | |
5930 | return NULL; | |
5931 | } | |
5932 | ||
65178db4 BS |
5933 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5934 | ||
c2f1a551 MS |
5935 | /* |
5936 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5937 | * client may quite reasonably hang on to a delegation as long as it has | |
5938 | * the inode cached. This becomes an obvious problem the first time a | |
5939 | * client's inode cache approaches the size of the server's total memory. | |
5940 | * | |
5941 | * For now we avoid this problem by imposing a hard limit on the number | |
5942 | * of delegations, which varies according to the server's memory size. | |
5943 | */ | |
5944 | static void | |
5945 | set_max_delegations(void) | |
5946 | { | |
5947 | /* | |
5948 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5949 | * estimates suggest that in the worst case (where every delegation | |
5950 | * is for a different inode), a delegation could take about 1.5K, | |
5951 | * giving a worst case usage of about 6% of memory. | |
5952 | */ | |
5953 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5954 | } | |
5955 | ||
d85ed443 | 5956 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5957 | { |
5958 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5959 | int i; | |
5960 | ||
5961 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5962 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5963 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5964 | goto err; |
0a7ec377 SK |
5965 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5966 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5967 | if (!nn->unconf_id_hashtbl) | |
5968 | goto err_unconf_id; | |
1872de0e SK |
5969 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5970 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5971 | if (!nn->sessionid_hashtbl) | |
5972 | goto err_sessionid; | |
8daae4dc | 5973 | |
382a62e7 | 5974 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5975 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5976 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5977 | } |
1872de0e SK |
5978 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5979 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5980 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5981 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5982 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5983 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5984 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5985 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5986 | |
09121281 | 5987 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5988 | get_net(net); |
09121281 | 5989 | |
8daae4dc | 5990 | return 0; |
382a62e7 | 5991 | |
1872de0e | 5992 | err_sessionid: |
9b531137 | 5993 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
5994 | err_unconf_id: |
5995 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5996 | err: |
5997 | return -ENOMEM; | |
8daae4dc SK |
5998 | } |
5999 | ||
6000 | static void | |
4dce0ac9 | 6001 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6002 | { |
6003 | int i; | |
6004 | struct nfs4_client *clp = NULL; | |
6005 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6006 | ||
6007 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6008 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6009 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6010 | destroy_client(clp); | |
6011 | } | |
6012 | } | |
a99454aa | 6013 | |
2b905635 KM |
6014 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6015 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6016 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6017 | destroy_client(clp); | |
6018 | } | |
a99454aa SK |
6019 | } |
6020 | ||
1872de0e | 6021 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6022 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6023 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6024 | put_net(net); |
8daae4dc SK |
6025 | } |
6026 | ||
f252bc68 | 6027 | int |
d85ed443 | 6028 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6029 | { |
5e1533c7 | 6030 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6031 | int ret; |
6032 | ||
d85ed443 | 6033 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6034 | if (ret) |
6035 | return ret; | |
5e1533c7 | 6036 | nfsd4_client_tracking_init(net); |
2c142baa | 6037 | nn->boot_time = get_seconds(); |
5ccb0066 | 6038 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 6039 | nn->grace_ended = false; |
d85ed443 | 6040 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6041 | nn->nfsd4_grace, net); |
6042 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6043 | return 0; |
6044 | } | |
6045 | ||
6046 | /* initialization to perform when the nfsd service is started: */ | |
6047 | ||
6048 | int | |
6049 | nfs4_state_start(void) | |
6050 | { | |
6051 | int ret; | |
6052 | ||
b5a1a81e | 6053 | ret = set_callback_cred(); |
d85ed443 SK |
6054 | if (ret) |
6055 | return -ENOMEM; | |
58da282b | 6056 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6057 | if (laundry_wq == NULL) { |
6058 | ret = -ENOMEM; | |
6059 | goto out_recovery; | |
6060 | } | |
b5a1a81e BF |
6061 | ret = nfsd4_create_callback_queue(); |
6062 | if (ret) | |
6063 | goto out_free_laundry; | |
09121281 | 6064 | |
c2f1a551 | 6065 | set_max_delegations(); |
d85ed443 | 6066 | |
b5a1a81e | 6067 | return 0; |
d85ed443 | 6068 | |
b5a1a81e BF |
6069 | out_free_laundry: |
6070 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6071 | out_recovery: |
b5a1a81e | 6072 | return ret; |
1da177e4 LT |
6073 | } |
6074 | ||
f252bc68 | 6075 | void |
4dce0ac9 | 6076 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6077 | { |
1da177e4 | 6078 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6079 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6080 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6081 | |
4dce0ac9 SK |
6082 | cancel_delayed_work_sync(&nn->laundromat_work); |
6083 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6084 | |
e50a26dc | 6085 | nfs4_lock_state(); |
1da177e4 | 6086 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6087 | spin_lock(&state_lock); |
e8c69d17 | 6088 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6089 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6090 | unhash_delegation_locked(dp); |
6091 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6092 | } |
cdc97505 | 6093 | spin_unlock(&state_lock); |
1da177e4 LT |
6094 | list_for_each_safe(pos, next, &reaplist) { |
6095 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6096 | list_del_init(&dp->dl_recall_lru); |
6011695d | 6097 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6098 | } |
6099 | ||
3320fef1 | 6100 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6101 | nfs4_state_destroy_net(net); |
e50a26dc | 6102 | nfs4_unlock_state(); |
1da177e4 LT |
6103 | } |
6104 | ||
6105 | void | |
6106 | nfs4_state_shutdown(void) | |
6107 | { | |
5e8d5c29 | 6108 | destroy_workqueue(laundry_wq); |
c3935e30 | 6109 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6110 | } |
8b70484c TM |
6111 | |
6112 | static void | |
6113 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6114 | { | |
37c593c5 TM |
6115 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6116 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6117 | } |
6118 | ||
6119 | static void | |
6120 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6121 | { | |
37c593c5 TM |
6122 | if (cstate->minorversion) { |
6123 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6124 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6125 | } | |
6126 | } | |
6127 | ||
6128 | void | |
6129 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6130 | { | |
6131 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6132 | } |
6133 | ||
62cd4a59 TM |
6134 | /* |
6135 | * functions to set current state id | |
6136 | */ | |
9428fe1a TM |
6137 | void |
6138 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6139 | { | |
6140 | put_stateid(cstate, &odp->od_stateid); | |
6141 | } | |
6142 | ||
8b70484c TM |
6143 | void |
6144 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6145 | { | |
6146 | put_stateid(cstate, &open->op_stateid); | |
6147 | } | |
6148 | ||
62cd4a59 TM |
6149 | void |
6150 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6151 | { | |
6152 | put_stateid(cstate, &close->cl_stateid); | |
6153 | } | |
6154 | ||
6155 | void | |
6156 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6157 | { | |
6158 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6159 | } | |
6160 | ||
6161 | /* | |
6162 | * functions to consume current state id | |
6163 | */ | |
1e97b519 | 6164 | |
9428fe1a TM |
6165 | void |
6166 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6167 | { | |
6168 | get_stateid(cstate, &odp->od_stateid); | |
6169 | } | |
6170 | ||
6171 | void | |
6172 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6173 | { | |
6174 | get_stateid(cstate, &drp->dr_stateid); | |
6175 | } | |
6176 | ||
1e97b519 TM |
6177 | void |
6178 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6179 | { | |
6180 | get_stateid(cstate, &fsp->fr_stateid); | |
6181 | } | |
6182 | ||
6183 | void | |
6184 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6185 | { | |
6186 | get_stateid(cstate, &setattr->sa_stateid); | |
6187 | } | |
6188 | ||
8b70484c TM |
6189 | void |
6190 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6191 | { | |
6192 | get_stateid(cstate, &close->cl_stateid); | |
6193 | } | |
6194 | ||
6195 | void | |
62cd4a59 | 6196 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6197 | { |
62cd4a59 | 6198 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6199 | } |
30813e27 TM |
6200 | |
6201 | void | |
6202 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6203 | { | |
6204 | get_stateid(cstate, &read->rd_stateid); | |
6205 | } | |
6206 | ||
6207 | void | |
6208 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6209 | { | |
6210 | get_stateid(cstate, &write->wr_stateid); | |
6211 | } |