]>
Commit | Line | Data |
---|---|---|
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 | ||
8b671b80 BF |
78 | /* |
79 | * Currently used for the del_recall_lru and file hash table. In an | |
80 | * effort to decrease the scope of the client_mutex, this spinlock may | |
81 | * eventually cover more: | |
82 | */ | |
cdc97505 | 83 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 84 | |
b401be22 JL |
85 | /* |
86 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
87 | * the refcount on the open stateid to drop. | |
88 | */ | |
89 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
90 | ||
abf1135b CH |
91 | static struct kmem_cache *openowner_slab; |
92 | static struct kmem_cache *lockowner_slab; | |
93 | static struct kmem_cache *file_slab; | |
94 | static struct kmem_cache *stateid_slab; | |
95 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 96 | |
66b2b9b2 | 97 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 98 | |
f0f51f5c | 99 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 100 | { |
f0f51f5c | 101 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
102 | } |
103 | ||
f0f51f5c | 104 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 105 | { |
f0f51f5c | 106 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
107 | return nfserr_jukebox; |
108 | ses->se_flags |= NFS4_SESSION_DEAD; | |
109 | return nfs_ok; | |
508dc6e1 BH |
110 | } |
111 | ||
221a6876 BF |
112 | static bool is_client_expired(struct nfs4_client *clp) |
113 | { | |
114 | return clp->cl_time == 0; | |
115 | } | |
116 | ||
221a6876 BF |
117 | static __be32 get_client_locked(struct nfs4_client *clp) |
118 | { | |
0a880a28 TM |
119 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
120 | ||
121 | lockdep_assert_held(&nn->client_lock); | |
122 | ||
221a6876 BF |
123 | if (is_client_expired(clp)) |
124 | return nfserr_expired; | |
125 | atomic_inc(&clp->cl_refcount); | |
126 | return nfs_ok; | |
127 | } | |
128 | ||
129 | /* must be called under the client_lock */ | |
130 | static inline void | |
131 | renew_client_locked(struct nfs4_client *clp) | |
132 | { | |
133 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
134 | ||
135 | if (is_client_expired(clp)) { | |
136 | WARN_ON(1); | |
137 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
138 | __func__, | |
139 | clp->cl_clientid.cl_boot, | |
140 | clp->cl_clientid.cl_id); | |
141 | return; | |
142 | } | |
143 | ||
144 | dprintk("renewing client (clientid %08x/%08x)\n", | |
145 | clp->cl_clientid.cl_boot, | |
146 | clp->cl_clientid.cl_id); | |
147 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
148 | clp->cl_time = get_seconds(); | |
149 | } | |
150 | ||
151 | static inline void | |
152 | renew_client(struct nfs4_client *clp) | |
153 | { | |
154 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
155 | ||
156 | spin_lock(&nn->client_lock); | |
157 | renew_client_locked(clp); | |
158 | spin_unlock(&nn->client_lock); | |
159 | } | |
160 | ||
ba138435 | 161 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 162 | { |
0a880a28 TM |
163 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
164 | ||
165 | lockdep_assert_held(&nn->client_lock); | |
166 | ||
221a6876 BF |
167 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
168 | return; | |
169 | if (!is_client_expired(clp)) | |
170 | renew_client_locked(clp); | |
171 | } | |
172 | ||
4b24ca7d JL |
173 | static void put_client_renew(struct nfs4_client *clp) |
174 | { | |
175 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
176 | ||
d6c249b4 JL |
177 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
178 | return; | |
179 | if (!is_client_expired(clp)) | |
180 | renew_client_locked(clp); | |
4b24ca7d JL |
181 | spin_unlock(&nn->client_lock); |
182 | } | |
183 | ||
d4e19e70 TM |
184 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
185 | { | |
186 | __be32 status; | |
187 | ||
188 | if (is_session_dead(ses)) | |
189 | return nfserr_badsession; | |
190 | status = get_client_locked(ses->se_client); | |
191 | if (status) | |
192 | return status; | |
193 | atomic_inc(&ses->se_ref); | |
194 | return nfs_ok; | |
195 | } | |
196 | ||
197 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
198 | { | |
199 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
200 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
201 | ||
202 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
203 | |
204 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
205 | free_session(ses); | |
206 | put_client_renew_locked(clp); | |
207 | } | |
208 | ||
209 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
210 | { | |
211 | struct nfs4_client *clp = ses->se_client; | |
212 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
213 | ||
214 | spin_lock(&nn->client_lock); | |
215 | nfsd4_put_session_locked(ses); | |
216 | spin_unlock(&nn->client_lock); | |
217 | } | |
218 | ||
7ffb5880 | 219 | static int |
d4f0489f | 220 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
221 | { |
222 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 223 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
224 | } |
225 | ||
226 | static struct nfs4_openowner * | |
227 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 228 | struct nfs4_client *clp) |
7ffb5880 TM |
229 | { |
230 | struct nfs4_stateowner *so; | |
7ffb5880 | 231 | |
d4f0489f | 232 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 233 | |
d4f0489f TM |
234 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
235 | so_strhash) { | |
7ffb5880 TM |
236 | if (!so->so_is_open_owner) |
237 | continue; | |
d4f0489f | 238 | if (same_owner_str(so, &open->op_owner)) { |
7ffb5880 | 239 | atomic_inc(&so->so_count); |
d4f0489f | 240 | return openowner(so); |
7ffb5880 TM |
241 | } |
242 | } | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | static struct nfs4_openowner * | |
247 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 248 | struct nfs4_client *clp) |
7ffb5880 TM |
249 | { |
250 | struct nfs4_openowner *oo; | |
251 | ||
d4f0489f TM |
252 | spin_lock(&clp->cl_lock); |
253 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
254 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
255 | return oo; |
256 | } | |
257 | ||
1da177e4 LT |
258 | static inline u32 |
259 | opaque_hashval(const void *ptr, int nbytes) | |
260 | { | |
261 | unsigned char *cptr = (unsigned char *) ptr; | |
262 | ||
263 | u32 x = 0; | |
264 | while (nbytes--) { | |
265 | x *= 37; | |
266 | x += *cptr++; | |
267 | } | |
268 | return x; | |
269 | } | |
270 | ||
32513b40 BF |
271 | static void nfsd4_free_file(struct nfs4_file *f) |
272 | { | |
273 | kmem_cache_free(file_slab, f); | |
274 | } | |
275 | ||
13cd2184 N |
276 | static inline void |
277 | put_nfs4_file(struct nfs4_file *fi) | |
278 | { | |
02e1215f JL |
279 | might_lock(&state_lock); |
280 | ||
cdc97505 | 281 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 282 | hlist_del(&fi->fi_hash); |
cdc97505 | 283 | spin_unlock(&state_lock); |
32513b40 | 284 | nfsd4_free_file(fi); |
8b671b80 | 285 | } |
13cd2184 N |
286 | } |
287 | ||
288 | static inline void | |
289 | get_nfs4_file(struct nfs4_file *fi) | |
290 | { | |
8b671b80 | 291 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
292 | } |
293 | ||
de18643d TM |
294 | static struct file * |
295 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
296 | { | |
297 | if (f->fi_fds[oflag]) | |
298 | return get_file(f->fi_fds[oflag]); | |
299 | return NULL; | |
300 | } | |
301 | ||
302 | static struct file * | |
303 | find_writeable_file_locked(struct nfs4_file *f) | |
304 | { | |
305 | struct file *ret; | |
306 | ||
307 | lockdep_assert_held(&f->fi_lock); | |
308 | ||
309 | ret = __nfs4_get_fd(f, O_WRONLY); | |
310 | if (!ret) | |
311 | ret = __nfs4_get_fd(f, O_RDWR); | |
312 | return ret; | |
313 | } | |
314 | ||
315 | static struct file * | |
316 | find_writeable_file(struct nfs4_file *f) | |
317 | { | |
318 | struct file *ret; | |
319 | ||
320 | spin_lock(&f->fi_lock); | |
321 | ret = find_writeable_file_locked(f); | |
322 | spin_unlock(&f->fi_lock); | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
327 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
328 | { | |
329 | struct file *ret; | |
330 | ||
331 | lockdep_assert_held(&f->fi_lock); | |
332 | ||
333 | ret = __nfs4_get_fd(f, O_RDONLY); | |
334 | if (!ret) | |
335 | ret = __nfs4_get_fd(f, O_RDWR); | |
336 | return ret; | |
337 | } | |
338 | ||
339 | static struct file * | |
340 | find_readable_file(struct nfs4_file *f) | |
341 | { | |
342 | struct file *ret; | |
343 | ||
344 | spin_lock(&f->fi_lock); | |
345 | ret = find_readable_file_locked(f); | |
346 | spin_unlock(&f->fi_lock); | |
347 | ||
348 | return ret; | |
349 | } | |
350 | ||
351 | static struct file * | |
352 | find_any_file(struct nfs4_file *f) | |
353 | { | |
354 | struct file *ret; | |
355 | ||
356 | spin_lock(&f->fi_lock); | |
357 | ret = __nfs4_get_fd(f, O_RDWR); | |
358 | if (!ret) { | |
359 | ret = __nfs4_get_fd(f, O_WRONLY); | |
360 | if (!ret) | |
361 | ret = __nfs4_get_fd(f, O_RDONLY); | |
362 | } | |
363 | spin_unlock(&f->fi_lock); | |
364 | return ret; | |
365 | } | |
366 | ||
02a3508d | 367 | static atomic_long_t num_delegations; |
697ce9be | 368 | unsigned long max_delegations; |
ef0f3390 N |
369 | |
370 | /* | |
371 | * Open owner state (share locks) | |
372 | */ | |
373 | ||
16bfdaaf BF |
374 | /* hash tables for lock and open owners */ |
375 | #define OWNER_HASH_BITS 8 | |
376 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
377 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 378 | |
d4f0489f | 379 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
380 | { |
381 | unsigned int ret; | |
382 | ||
383 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 384 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 385 | } |
ef0f3390 | 386 | |
ef0f3390 N |
387 | /* hash table for nfs4_file */ |
388 | #define FILE_HASH_BITS 8 | |
389 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 390 | |
ca943217 | 391 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 392 | { |
ca943217 TM |
393 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
394 | } | |
395 | ||
396 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
397 | { | |
398 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
399 | } | |
400 | ||
401 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
402 | { | |
403 | return fh1->fh_size == fh2->fh_size && | |
404 | !memcmp(fh1->fh_base.fh_pad, | |
405 | fh2->fh_base.fh_pad, | |
406 | fh1->fh_size); | |
ddc04c41 BF |
407 | } |
408 | ||
89876f8c | 409 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 410 | |
12659651 JL |
411 | static void |
412 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 413 | { |
7214e860 JL |
414 | lockdep_assert_held(&fp->fi_lock); |
415 | ||
12659651 JL |
416 | if (access & NFS4_SHARE_ACCESS_WRITE) |
417 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
418 | if (access & NFS4_SHARE_ACCESS_READ) | |
419 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
420 | } |
421 | ||
12659651 JL |
422 | static __be32 |
423 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 424 | { |
7214e860 JL |
425 | lockdep_assert_held(&fp->fi_lock); |
426 | ||
12659651 JL |
427 | /* Does this access mode make sense? */ |
428 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
429 | return nfserr_inval; | |
430 | ||
baeb4ff0 JL |
431 | /* Does it conflict with a deny mode already set? */ |
432 | if ((access & fp->fi_share_deny) != 0) | |
433 | return nfserr_share_denied; | |
434 | ||
12659651 JL |
435 | __nfs4_file_get_access(fp, access); |
436 | return nfs_ok; | |
998db52c BF |
437 | } |
438 | ||
baeb4ff0 JL |
439 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
440 | { | |
441 | /* Common case is that there is no deny mode. */ | |
442 | if (deny) { | |
443 | /* Does this deny mode make sense? */ | |
444 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
445 | return nfserr_inval; | |
446 | ||
447 | if ((deny & NFS4_SHARE_DENY_READ) && | |
448 | atomic_read(&fp->fi_access[O_RDONLY])) | |
449 | return nfserr_share_denied; | |
450 | ||
451 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
452 | atomic_read(&fp->fi_access[O_WRONLY])) | |
453 | return nfserr_share_denied; | |
454 | } | |
455 | return nfs_ok; | |
456 | } | |
457 | ||
998db52c | 458 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 459 | { |
de18643d TM |
460 | might_lock(&fp->fi_lock); |
461 | ||
462 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
463 | struct file *f1 = NULL; | |
464 | struct file *f2 = NULL; | |
465 | ||
6d338b51 | 466 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 467 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 468 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
469 | spin_unlock(&fp->fi_lock); |
470 | if (f1) | |
471 | fput(f1); | |
472 | if (f2) | |
473 | fput(f2); | |
f9d7562f BF |
474 | } |
475 | } | |
476 | ||
12659651 | 477 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 478 | { |
12659651 JL |
479 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
480 | ||
481 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 482 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
483 | if (access & NFS4_SHARE_ACCESS_READ) |
484 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
485 | } |
486 | ||
6011695d TM |
487 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
488 | struct kmem_cache *slab) | |
2a74aba7 | 489 | { |
3abdb607 | 490 | struct nfs4_stid *stid; |
6136d2b4 | 491 | int new_id; |
2a74aba7 | 492 | |
f8338834 | 493 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
494 | if (!stid) |
495 | return NULL; | |
496 | ||
4770d722 JL |
497 | idr_preload(GFP_KERNEL); |
498 | spin_lock(&cl->cl_lock); | |
499 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
500 | spin_unlock(&cl->cl_lock); | |
501 | idr_preload_end(); | |
ebd6c707 | 502 | if (new_id < 0) |
3abdb607 | 503 | goto out_free; |
2a74aba7 | 504 | stid->sc_client = cl; |
3abdb607 BF |
505 | stid->sc_stateid.si_opaque.so_id = new_id; |
506 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 507 | /* Will be incremented before return to client: */ |
72c0b0fb | 508 | atomic_set(&stid->sc_count, 1); |
996e0938 | 509 | |
996e0938 | 510 | /* |
3abdb607 BF |
511 | * It shouldn't be a problem to reuse an opaque stateid value. |
512 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
513 | * example, a stray write retransmission could be accepted by | |
514 | * the server when it should have been rejected. Therefore, | |
515 | * adopt a trick from the sctp code to attempt to maximize the | |
516 | * amount of time until an id is reused, by ensuring they always | |
517 | * "increase" (mod INT_MAX): | |
996e0938 | 518 | */ |
3abdb607 BF |
519 | return stid; |
520 | out_free: | |
2c44a234 | 521 | kmem_cache_free(slab, stid); |
3abdb607 | 522 | return NULL; |
2a74aba7 BF |
523 | } |
524 | ||
b49e084d | 525 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 526 | { |
6011695d TM |
527 | struct nfs4_stid *stid; |
528 | struct nfs4_ol_stateid *stp; | |
529 | ||
530 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
531 | if (!stid) | |
532 | return NULL; | |
533 | ||
534 | stp = openlockstateid(stid); | |
535 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
536 | return stp; | |
537 | } | |
538 | ||
539 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
540 | { | |
6011695d TM |
541 | kmem_cache_free(deleg_slab, stid); |
542 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
543 | } |
544 | ||
6282cd56 N |
545 | /* |
546 | * When we recall a delegation, we should be careful not to hand it | |
547 | * out again straight away. | |
548 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
549 | * in which the filehandles of recalled delegations are "stored". | |
550 | * If a filehandle appear in either filter, a delegation is blocked. | |
551 | * When a delegation is recalled, the filehandle is stored in the "new" | |
552 | * filter. | |
553 | * Every 30 seconds we swap the filters and clear the "new" one, | |
554 | * unless both are empty of course. | |
555 | * | |
556 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
557 | * low 3 bytes as hash-table indices. | |
558 | * | |
f54fe962 | 559 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
560 | * is used to manage concurrent access. Testing does not need the lock |
561 | * except when swapping the two filters. | |
562 | */ | |
f54fe962 | 563 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
564 | static struct bloom_pair { |
565 | int entries, old_entries; | |
566 | time_t swap_time; | |
567 | int new; /* index into 'set' */ | |
568 | DECLARE_BITMAP(set[2], 256); | |
569 | } blocked_delegations; | |
570 | ||
571 | static int delegation_blocked(struct knfsd_fh *fh) | |
572 | { | |
573 | u32 hash; | |
574 | struct bloom_pair *bd = &blocked_delegations; | |
575 | ||
576 | if (bd->entries == 0) | |
577 | return 0; | |
578 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 579 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
580 | if (seconds_since_boot() - bd->swap_time > 30) { |
581 | bd->entries -= bd->old_entries; | |
582 | bd->old_entries = bd->entries; | |
583 | memset(bd->set[bd->new], 0, | |
584 | sizeof(bd->set[0])); | |
585 | bd->new = 1-bd->new; | |
586 | bd->swap_time = seconds_since_boot(); | |
587 | } | |
f54fe962 | 588 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
589 | } |
590 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
591 | if (test_bit(hash&255, bd->set[0]) && | |
592 | test_bit((hash>>8)&255, bd->set[0]) && | |
593 | test_bit((hash>>16)&255, bd->set[0])) | |
594 | return 1; | |
595 | ||
596 | if (test_bit(hash&255, bd->set[1]) && | |
597 | test_bit((hash>>8)&255, bd->set[1]) && | |
598 | test_bit((hash>>16)&255, bd->set[1])) | |
599 | return 1; | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | static void block_delegations(struct knfsd_fh *fh) | |
605 | { | |
606 | u32 hash; | |
607 | struct bloom_pair *bd = &blocked_delegations; | |
608 | ||
609 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
610 | ||
f54fe962 | 611 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
612 | __set_bit(hash&255, bd->set[bd->new]); |
613 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
614 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
615 | if (bd->entries == 0) | |
616 | bd->swap_time = seconds_since_boot(); | |
617 | bd->entries += 1; | |
f54fe962 | 618 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
619 | } |
620 | ||
1da177e4 | 621 | static struct nfs4_delegation * |
f9416e28 | 622 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
623 | { |
624 | struct nfs4_delegation *dp; | |
02a3508d | 625 | long n; |
1da177e4 LT |
626 | |
627 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
628 | n = atomic_long_inc_return(&num_delegations); |
629 | if (n < 0 || n > max_delegations) | |
630 | goto out_dec; | |
6282cd56 | 631 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 632 | goto out_dec; |
996e0938 | 633 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 634 | if (dp == NULL) |
02a3508d | 635 | goto out_dec; |
6011695d TM |
636 | |
637 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
638 | /* |
639 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
640 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
641 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
642 | */ |
643 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
644 | INIT_LIST_HEAD(&dp->dl_perfile); |
645 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 646 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 647 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 648 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 649 | return dp; |
02a3508d TM |
650 | out_dec: |
651 | atomic_long_dec(&num_delegations); | |
652 | return NULL; | |
1da177e4 LT |
653 | } |
654 | ||
655 | void | |
6011695d | 656 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 657 | { |
11b9164a | 658 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
659 | struct nfs4_client *clp = s->sc_client; |
660 | ||
4770d722 JL |
661 | might_lock(&clp->cl_lock); |
662 | ||
b401be22 JL |
663 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
664 | wake_up_all(&close_wq); | |
6011695d | 665 | return; |
b401be22 | 666 | } |
6011695d | 667 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
4770d722 | 668 | spin_unlock(&clp->cl_lock); |
6011695d | 669 | s->sc_free(s); |
11b9164a TM |
670 | if (fp) |
671 | put_nfs4_file(fp); | |
1da177e4 LT |
672 | } |
673 | ||
acfdf5c3 | 674 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 675 | { |
417c6629 JL |
676 | lockdep_assert_held(&state_lock); |
677 | ||
cbf7a75b BF |
678 | if (!fp->fi_lease) |
679 | return; | |
acfdf5c3 BF |
680 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
681 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
682 | fp->fi_lease = NULL; | |
4ee63624 | 683 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
684 | fp->fi_deleg_file = NULL; |
685 | } | |
1da177e4 LT |
686 | } |
687 | ||
6136d2b4 BF |
688 | static void unhash_stid(struct nfs4_stid *s) |
689 | { | |
3abdb607 | 690 | s->sc_type = 0; |
6136d2b4 BF |
691 | } |
692 | ||
931ee56c BH |
693 | static void |
694 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
695 | { | |
cdc97505 | 696 | lockdep_assert_held(&state_lock); |
417c6629 | 697 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 698 | |
67cb1279 | 699 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 700 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
701 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
702 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
703 | } | |
704 | ||
1da177e4 | 705 | static void |
42690676 | 706 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 707 | { |
11b9164a | 708 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 709 | |
42690676 JL |
710 | lockdep_assert_held(&state_lock); |
711 | ||
b0fc29d6 | 712 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
713 | /* Ensure that deleg break won't try to requeue it */ |
714 | ++dp->dl_time; | |
417c6629 | 715 | spin_lock(&fp->fi_lock); |
931ee56c | 716 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 717 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
718 | list_del_init(&dp->dl_perfile); |
719 | spin_unlock(&fp->fi_lock); | |
f8338834 | 720 | if (fp) |
02e1215f | 721 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
722 | } |
723 | ||
3bd64a5b BF |
724 | static void destroy_delegation(struct nfs4_delegation *dp) |
725 | { | |
42690676 JL |
726 | spin_lock(&state_lock); |
727 | unhash_delegation_locked(dp); | |
728 | spin_unlock(&state_lock); | |
6011695d | 729 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
730 | } |
731 | ||
732 | static void revoke_delegation(struct nfs4_delegation *dp) | |
733 | { | |
734 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
735 | ||
2d4a532d JL |
736 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
737 | ||
3bd64a5b | 738 | if (clp->cl_minorversion == 0) |
6011695d | 739 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 740 | else { |
3bd64a5b | 741 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
742 | spin_lock(&clp->cl_lock); |
743 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
744 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
745 | } |
746 | } | |
747 | ||
1da177e4 LT |
748 | /* |
749 | * SETCLIENTID state | |
750 | */ | |
751 | ||
ddc04c41 BF |
752 | static unsigned int clientid_hashval(u32 id) |
753 | { | |
754 | return id & CLIENT_HASH_MASK; | |
755 | } | |
756 | ||
757 | static unsigned int clientstr_hashval(const char *name) | |
758 | { | |
759 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
760 | } | |
761 | ||
f9d7562f BF |
762 | /* |
763 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
764 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
765 | * only what share bits are currently in force, but also what | |
766 | * combinations of share bits previous opens have used. This allows us | |
767 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
768 | * return an error if the client attempt to downgrade to a combination | |
769 | * of share bits not explicable by closing some of its previous opens. | |
770 | * | |
771 | * XXX: This enforcement is actually incomplete, since we don't keep | |
772 | * track of access/deny bit combinations; so, e.g., we allow: | |
773 | * | |
774 | * OPEN allow read, deny write | |
775 | * OPEN allow both, deny none | |
776 | * DOWNGRADE allow read, deny none | |
777 | * | |
778 | * which we should reject. | |
779 | */ | |
5ae037e5 JL |
780 | static unsigned int |
781 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 782 | int i; |
5ae037e5 | 783 | unsigned int access = 0; |
f9d7562f | 784 | |
f9d7562f BF |
785 | for (i = 1; i < 4; i++) { |
786 | if (test_bit(i, &bmap)) | |
5ae037e5 | 787 | access |= i; |
f9d7562f | 788 | } |
5ae037e5 | 789 | return access; |
f9d7562f BF |
790 | } |
791 | ||
82c5ff1b JL |
792 | /* set share access for a given stateid */ |
793 | static inline void | |
794 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
795 | { | |
c11c591f JL |
796 | unsigned char mask = 1 << access; |
797 | ||
798 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
799 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
800 | } |
801 | ||
802 | /* clear share access for a given stateid */ | |
803 | static inline void | |
804 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
805 | { | |
c11c591f JL |
806 | unsigned char mask = 1 << access; |
807 | ||
808 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
809 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
810 | } |
811 | ||
812 | /* test whether a given stateid has access */ | |
813 | static inline bool | |
814 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
815 | { | |
c11c591f JL |
816 | unsigned char mask = 1 << access; |
817 | ||
818 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
819 | } |
820 | ||
ce0fc43c JL |
821 | /* set share deny for a given stateid */ |
822 | static inline void | |
c11c591f | 823 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 824 | { |
c11c591f JL |
825 | unsigned char mask = 1 << deny; |
826 | ||
827 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
828 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
829 | } |
830 | ||
831 | /* clear share deny for a given stateid */ | |
832 | static inline void | |
c11c591f | 833 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 834 | { |
c11c591f JL |
835 | unsigned char mask = 1 << deny; |
836 | ||
837 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
838 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
839 | } |
840 | ||
841 | /* test whether a given stateid is denying specific access */ | |
842 | static inline bool | |
c11c591f | 843 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 844 | { |
c11c591f JL |
845 | unsigned char mask = 1 << deny; |
846 | ||
847 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
848 | } |
849 | ||
850 | static int nfs4_access_to_omode(u32 access) | |
851 | { | |
8f34a430 | 852 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
853 | case NFS4_SHARE_ACCESS_READ: |
854 | return O_RDONLY; | |
855 | case NFS4_SHARE_ACCESS_WRITE: | |
856 | return O_WRONLY; | |
857 | case NFS4_SHARE_ACCESS_BOTH: | |
858 | return O_RDWR; | |
859 | } | |
063b0fb9 BF |
860 | WARN_ON_ONCE(1); |
861 | return O_RDONLY; | |
f9d7562f BF |
862 | } |
863 | ||
baeb4ff0 JL |
864 | /* |
865 | * A stateid that had a deny mode associated with it is being released | |
866 | * or downgraded. Recalculate the deny mode on the file. | |
867 | */ | |
868 | static void | |
869 | recalculate_deny_mode(struct nfs4_file *fp) | |
870 | { | |
871 | struct nfs4_ol_stateid *stp; | |
872 | ||
873 | spin_lock(&fp->fi_lock); | |
874 | fp->fi_share_deny = 0; | |
875 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
876 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
877 | spin_unlock(&fp->fi_lock); | |
878 | } | |
879 | ||
880 | static void | |
881 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
882 | { | |
883 | int i; | |
884 | bool change = false; | |
885 | ||
886 | for (i = 1; i < 4; i++) { | |
887 | if ((i & deny) != i) { | |
888 | change = true; | |
889 | clear_deny(i, stp); | |
890 | } | |
891 | } | |
892 | ||
893 | /* Recalculate per-file deny mode if there was a change */ | |
894 | if (change) | |
11b9164a | 895 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
896 | } |
897 | ||
82c5ff1b JL |
898 | /* release all access and file references for a given stateid */ |
899 | static void | |
900 | release_all_access(struct nfs4_ol_stateid *stp) | |
901 | { | |
902 | int i; | |
11b9164a | 903 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
904 | |
905 | if (fp && stp->st_deny_bmap != 0) | |
906 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
907 | |
908 | for (i = 1; i < 4; i++) { | |
909 | if (test_access(i, stp)) | |
11b9164a | 910 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
911 | clear_access(i, stp); |
912 | } | |
913 | } | |
914 | ||
6b180f0b JL |
915 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
916 | { | |
a819ecc1 JL |
917 | struct nfs4_client *clp = sop->so_client; |
918 | ||
919 | might_lock(&clp->cl_lock); | |
920 | ||
921 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 922 | return; |
8f4b54c5 | 923 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 924 | spin_unlock(&clp->cl_lock); |
6b180f0b JL |
925 | kfree(sop->so_owner.data); |
926 | sop->so_ops->so_free(sop); | |
927 | } | |
928 | ||
4ae098d3 | 929 | static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 930 | { |
11b9164a | 931 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 932 | |
1c755dc1 JL |
933 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
934 | ||
1d31a253 | 935 | spin_lock(&fp->fi_lock); |
529d7b2a | 936 | list_del(&stp->st_perfile); |
1d31a253 | 937 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
938 | list_del(&stp->st_perstateowner); |
939 | } | |
940 | ||
6011695d | 941 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 942 | { |
6011695d | 943 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 944 | |
6011695d | 945 | release_all_access(stp); |
d3134b10 JL |
946 | if (stp->st_stateowner) |
947 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 948 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
949 | } |
950 | ||
b49e084d | 951 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 952 | { |
b49e084d JL |
953 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
954 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
955 | struct file *file; |
956 | ||
b49e084d JL |
957 | file = find_any_file(stp->st_stid.sc_file); |
958 | if (file) | |
959 | filp_close(file, (fl_owner_t)lo); | |
960 | nfs4_free_ol_stateid(stid); | |
961 | } | |
962 | ||
2c41beb0 JL |
963 | /* |
964 | * Put the persistent reference to an already unhashed generic stateid, while | |
965 | * holding the cl_lock. If it's the last reference, then put it onto the | |
966 | * reaplist for later destruction. | |
967 | */ | |
968 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
969 | struct list_head *reaplist) | |
970 | { | |
971 | struct nfs4_stid *s = &stp->st_stid; | |
972 | struct nfs4_client *clp = s->sc_client; | |
973 | ||
974 | lockdep_assert_held(&clp->cl_lock); | |
975 | ||
976 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
977 | ||
978 | if (!atomic_dec_and_test(&s->sc_count)) { | |
979 | wake_up_all(&close_wq); | |
980 | return; | |
981 | } | |
982 | ||
983 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
984 | list_add(&stp->st_locks, reaplist); | |
985 | } | |
986 | ||
3c1c995c | 987 | static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 988 | { |
1c755dc1 JL |
989 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
990 | ||
3c1c995c JL |
991 | lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); |
992 | ||
993 | list_del_init(&stp->st_locks); | |
4ae098d3 | 994 | unhash_ol_stateid(stp); |
6136d2b4 | 995 | unhash_stid(&stp->st_stid); |
3c1c995c JL |
996 | } |
997 | ||
998 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
999 | { | |
1000 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); | |
1001 | ||
1002 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
1003 | unhash_lock_stateid(stp); | |
1c755dc1 | 1004 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 1005 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
1006 | } |
1007 | ||
c58c6610 | 1008 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1009 | { |
d4f0489f | 1010 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1011 | |
d4f0489f | 1012 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1013 | |
8f4b54c5 JL |
1014 | list_del_init(&lo->lo_owner.so_strhash); |
1015 | } | |
1016 | ||
2c41beb0 JL |
1017 | /* |
1018 | * Free a list of generic stateids that were collected earlier after being | |
1019 | * fully unhashed. | |
1020 | */ | |
1021 | static void | |
1022 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1023 | { | |
1024 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1025 | struct nfs4_file *fp; |
2c41beb0 JL |
1026 | |
1027 | might_sleep(); | |
1028 | ||
1029 | while (!list_empty(reaplist)) { | |
1030 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1031 | st_locks); | |
1032 | list_del(&stp->st_locks); | |
fb94d766 | 1033 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1034 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1035 | if (fp) |
1036 | put_nfs4_file(fp); | |
2c41beb0 JL |
1037 | } |
1038 | } | |
1039 | ||
3c1c995c | 1040 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 1041 | { |
d4f0489f | 1042 | struct nfs4_client *clp = lo->lo_owner.so_client; |
dcef0413 | 1043 | struct nfs4_ol_stateid *stp; |
3c1c995c | 1044 | struct list_head reaplist; |
529d7b2a | 1045 | |
3c1c995c | 1046 | INIT_LIST_HEAD(&reaplist); |
c58c6610 | 1047 | |
3c1c995c JL |
1048 | spin_lock(&clp->cl_lock); |
1049 | unhash_lockowner_locked(lo); | |
fe0750e5 BF |
1050 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
1051 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 1052 | struct nfs4_ol_stateid, st_perstateowner); |
3c1c995c | 1053 | unhash_lock_stateid(stp); |
2c41beb0 | 1054 | put_ol_stateid_locked(stp, &reaplist); |
529d7b2a | 1055 | } |
d4f0489f | 1056 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1057 | free_ol_stateid_reaplist(&reaplist); |
6b180f0b | 1058 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
1059 | } |
1060 | ||
d83017f9 JL |
1061 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1062 | struct list_head *reaplist) | |
3c87b9b7 TM |
1063 | { |
1064 | struct nfs4_ol_stateid *stp; | |
1065 | ||
1066 | while (!list_empty(&open_stp->st_locks)) { | |
1067 | stp = list_entry(open_stp->st_locks.next, | |
1068 | struct nfs4_ol_stateid, st_locks); | |
d83017f9 JL |
1069 | unhash_lock_stateid(stp); |
1070 | put_ol_stateid_locked(stp, reaplist); | |
529d7b2a BF |
1071 | } |
1072 | } | |
1073 | ||
d83017f9 JL |
1074 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp, |
1075 | struct list_head *reaplist) | |
2283963f | 1076 | { |
2c41beb0 JL |
1077 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1078 | ||
4ae098d3 | 1079 | unhash_ol_stateid(stp); |
d83017f9 | 1080 | release_open_stateid_locks(stp, reaplist); |
38c387b5 BF |
1081 | } |
1082 | ||
1083 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1084 | { | |
2c41beb0 JL |
1085 | LIST_HEAD(reaplist); |
1086 | ||
1087 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
d83017f9 | 1088 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 JL |
1089 | put_ol_stateid_locked(stp, &reaplist); |
1090 | spin_unlock(&stp->st_stid.sc_client->cl_lock); | |
1091 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1092 | } |
1093 | ||
7ffb5880 | 1094 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1095 | { |
d4f0489f | 1096 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1097 | |
d4f0489f | 1098 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1099 | |
8f4b54c5 JL |
1100 | list_del_init(&oo->oo_owner.so_strhash); |
1101 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1102 | } |
1103 | ||
f7a4d872 BF |
1104 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1105 | { | |
217526e7 JL |
1106 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1107 | nfsd_net_id); | |
1108 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1109 | |
217526e7 JL |
1110 | spin_lock(&nn->client_lock); |
1111 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1112 | if (s) { |
d3134b10 | 1113 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1114 | oo->oo_last_closed_stid = NULL; |
1115 | } | |
217526e7 JL |
1116 | spin_unlock(&nn->client_lock); |
1117 | if (s) | |
1118 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1119 | } |
1120 | ||
2c41beb0 | 1121 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1122 | { |
1123 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1124 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1125 | struct list_head reaplist; |
7ffb5880 | 1126 | |
2c41beb0 | 1127 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1128 | |
2c41beb0 JL |
1129 | spin_lock(&clp->cl_lock); |
1130 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1131 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1132 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1133 | struct nfs4_ol_stateid, st_perstateowner); | |
d83017f9 | 1134 | unhash_open_stateid(stp, &reaplist); |
2c41beb0 | 1135 | put_ol_stateid_locked(stp, &reaplist); |
8f4b54c5 | 1136 | } |
d4f0489f | 1137 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1138 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1139 | release_last_closed_stateid(oo); |
6b180f0b | 1140 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1141 | } |
1142 | ||
5282fd72 ME |
1143 | static inline int |
1144 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1145 | { | |
1146 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1147 | ||
1148 | return sid->sequence % SESSION_HASH_SIZE; | |
1149 | } | |
1150 | ||
8f199b82 | 1151 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1152 | static inline void |
1153 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1154 | { | |
1155 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1156 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1157 | } | |
8f199b82 TM |
1158 | #else |
1159 | static inline void | |
1160 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1161 | { | |
1162 | } | |
1163 | #endif | |
1164 | ||
9411b1d4 BF |
1165 | /* |
1166 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1167 | * won't be used for replay. | |
1168 | */ | |
1169 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1170 | { | |
1171 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1172 | ||
1173 | if (nfserr == nfserr_replay_me) | |
1174 | return; | |
1175 | ||
1176 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1177 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1178 | return; |
1179 | } | |
1180 | if (!so) | |
1181 | return; | |
1182 | if (so->so_is_open_owner) | |
1183 | release_last_closed_stateid(openowner(so)); | |
1184 | so->so_seqid++; | |
1185 | return; | |
1186 | } | |
5282fd72 | 1187 | |
ec6b5d7b AA |
1188 | static void |
1189 | gen_sessionid(struct nfsd4_session *ses) | |
1190 | { | |
1191 | struct nfs4_client *clp = ses->se_client; | |
1192 | struct nfsd4_sessionid *sid; | |
1193 | ||
1194 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1195 | sid->clientid = clp->cl_clientid; | |
1196 | sid->sequence = current_sessionid++; | |
1197 | sid->reserved = 0; | |
1198 | } | |
1199 | ||
1200 | /* | |
a649637c AA |
1201 | * The protocol defines ca_maxresponssize_cached to include the size of |
1202 | * the rpc header, but all we need to cache is the data starting after | |
1203 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1204 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1205 | * value that is the number of bytes in our cache plus a few additional | |
1206 | * bytes. In order to stay on the safe side, and not promise more than | |
1207 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1208 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1209 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1210 | * for the SEQUENCE op response: | |
1211 | */ | |
1212 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1213 | ||
557ce264 AA |
1214 | static void |
1215 | free_session_slots(struct nfsd4_session *ses) | |
1216 | { | |
1217 | int i; | |
1218 | ||
1219 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1220 | kfree(ses->se_slots[i]); | |
1221 | } | |
1222 | ||
a649637c | 1223 | /* |
efe0cb6d BF |
1224 | * We don't actually need to cache the rpc and session headers, so we |
1225 | * can allocate a little less for each slot: | |
1226 | */ | |
55c760cf | 1227 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1228 | { |
55c760cf | 1229 | u32 size; |
efe0cb6d | 1230 | |
55c760cf BF |
1231 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1232 | size = 0; | |
1233 | else | |
1234 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1235 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1236 | } |
ec6b5d7b | 1237 | |
5b6feee9 BF |
1238 | /* |
1239 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1240 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1241 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1242 | */ |
55c760cf | 1243 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1244 | { |
55c760cf BF |
1245 | u32 slotsize = slot_bytes(ca); |
1246 | u32 num = ca->maxreqs; | |
5b6feee9 | 1247 | int avail; |
ec6b5d7b | 1248 | |
5b6feee9 | 1249 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1250 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1251 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1252 | num = min_t(int, num, avail / slotsize); |
1253 | nfsd_drc_mem_used += num * slotsize; | |
1254 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1255 | |
5b6feee9 BF |
1256 | return num; |
1257 | } | |
ec6b5d7b | 1258 | |
55c760cf | 1259 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1260 | { |
55c760cf BF |
1261 | int slotsize = slot_bytes(ca); |
1262 | ||
4bd9b0f4 | 1263 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1264 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1265 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1266 | } |
ec6b5d7b | 1267 | |
60810e54 KM |
1268 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1269 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1270 | { |
60810e54 KM |
1271 | int numslots = fattrs->maxreqs; |
1272 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1273 | struct nfsd4_session *new; |
1274 | int mem, i; | |
a649637c | 1275 | |
5b6feee9 BF |
1276 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1277 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1278 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1279 | |
5b6feee9 BF |
1280 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1281 | if (!new) | |
1282 | return NULL; | |
557ce264 | 1283 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1284 | for (i = 0; i < numslots; i++) { |
55c760cf | 1285 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1286 | if (!new->se_slots[i]) |
557ce264 | 1287 | goto out_free; |
557ce264 | 1288 | } |
60810e54 KM |
1289 | |
1290 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1291 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1292 | ||
5b6feee9 BF |
1293 | return new; |
1294 | out_free: | |
1295 | while (i--) | |
1296 | kfree(new->se_slots[i]); | |
1297 | kfree(new); | |
1298 | return NULL; | |
ec6b5d7b AA |
1299 | } |
1300 | ||
19cf5c02 BF |
1301 | static void free_conn(struct nfsd4_conn *c) |
1302 | { | |
1303 | svc_xprt_put(c->cn_xprt); | |
1304 | kfree(c); | |
1305 | } | |
ec6b5d7b | 1306 | |
19cf5c02 BF |
1307 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1308 | { | |
1309 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1310 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1311 | |
19cf5c02 BF |
1312 | spin_lock(&clp->cl_lock); |
1313 | if (!list_empty(&c->cn_persession)) { | |
1314 | list_del(&c->cn_persession); | |
1315 | free_conn(c); | |
1316 | } | |
eea49806 | 1317 | nfsd4_probe_callback(clp); |
2e4b7239 | 1318 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1319 | } |
ec6b5d7b | 1320 | |
d29c374c | 1321 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1322 | { |
c7662518 | 1323 | struct nfsd4_conn *conn; |
ec6b5d7b | 1324 | |
c7662518 BF |
1325 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1326 | if (!conn) | |
db90681d | 1327 | return NULL; |
c7662518 BF |
1328 | svc_xprt_get(rqstp->rq_xprt); |
1329 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1330 | conn->cn_flags = flags; |
db90681d BF |
1331 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1332 | return conn; | |
1333 | } | |
a649637c | 1334 | |
328ead28 BF |
1335 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1336 | { | |
1337 | conn->cn_session = ses; | |
1338 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1339 | } |
1340 | ||
db90681d | 1341 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1342 | { |
db90681d | 1343 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1344 | |
c7662518 | 1345 | spin_lock(&clp->cl_lock); |
328ead28 | 1346 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1347 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1348 | } |
1349 | ||
21b75b01 | 1350 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1351 | { |
19cf5c02 | 1352 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1353 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1354 | } |
1355 | ||
e1ff371f | 1356 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1357 | { |
21b75b01 | 1358 | int ret; |
ec6b5d7b | 1359 | |
db90681d | 1360 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1361 | ret = nfsd4_register_conn(conn); |
1362 | if (ret) | |
1363 | /* oops; xprt is already down: */ | |
1364 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1365 | /* We may have gained or lost a callback channel: */ |
1366 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1367 | } |
ec6b5d7b | 1368 | |
e1ff371f | 1369 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1370 | { |
1371 | u32 dir = NFS4_CDFC4_FORE; | |
1372 | ||
e1ff371f | 1373 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1374 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1375 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1376 | } |
1377 | ||
1378 | /* must be called under client_lock */ | |
19cf5c02 | 1379 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1380 | { |
19cf5c02 BF |
1381 | struct nfs4_client *clp = s->se_client; |
1382 | struct nfsd4_conn *c; | |
ec6b5d7b | 1383 | |
19cf5c02 BF |
1384 | spin_lock(&clp->cl_lock); |
1385 | while (!list_empty(&s->se_conns)) { | |
1386 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1387 | list_del_init(&c->cn_persession); | |
1388 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1389 | |
19cf5c02 BF |
1390 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1391 | free_conn(c); | |
ec6b5d7b | 1392 | |
19cf5c02 BF |
1393 | spin_lock(&clp->cl_lock); |
1394 | } | |
1395 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1396 | } |
ec6b5d7b | 1397 | |
1377b69e BF |
1398 | static void __free_session(struct nfsd4_session *ses) |
1399 | { | |
1377b69e BF |
1400 | free_session_slots(ses); |
1401 | kfree(ses); | |
1402 | } | |
1403 | ||
66b2b9b2 | 1404 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1405 | { |
19cf5c02 | 1406 | nfsd4_del_conns(ses); |
55c760cf | 1407 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1408 | __free_session(ses); |
c7662518 BF |
1409 | } |
1410 | ||
135ae827 | 1411 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1412 | { |
a827bcb2 | 1413 | int idx; |
1872de0e | 1414 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1415 | |
ec6b5d7b AA |
1416 | new->se_client = clp; |
1417 | gen_sessionid(new); | |
ec6b5d7b | 1418 | |
c7662518 BF |
1419 | INIT_LIST_HEAD(&new->se_conns); |
1420 | ||
ac7c46f2 | 1421 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1422 | new->se_flags = cses->flags; |
8b5ce5cd | 1423 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1424 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1425 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1426 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1427 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1428 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1429 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1430 | spin_unlock(&clp->cl_lock); |
60810e54 | 1431 | |
dcbeaa68 | 1432 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1433 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1434 | /* |
1435 | * This is a little silly; with sessions there's no real | |
1436 | * use for the callback address. Use the peer address | |
1437 | * as a reasonable default for now, but consider fixing | |
1438 | * the rpc client not to require an address in the | |
1439 | * future: | |
1440 | */ | |
edd76786 BF |
1441 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1442 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1443 | } |
ec6b5d7b AA |
1444 | } |
1445 | ||
9089f1b4 | 1446 | /* caller must hold client_lock */ |
5282fd72 | 1447 | static struct nfsd4_session * |
d4e19e70 | 1448 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1449 | { |
1450 | struct nfsd4_session *elem; | |
1451 | int idx; | |
1872de0e | 1452 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1453 | |
0a880a28 TM |
1454 | lockdep_assert_held(&nn->client_lock); |
1455 | ||
5282fd72 ME |
1456 | dump_sessionid(__func__, sessionid); |
1457 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1458 | /* Search in the appropriate list */ |
1872de0e | 1459 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1460 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1461 | NFS4_MAX_SESSIONID_LEN)) { | |
1462 | return elem; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | dprintk("%s: session not found\n", __func__); | |
1467 | return NULL; | |
1468 | } | |
1469 | ||
d4e19e70 TM |
1470 | static struct nfsd4_session * |
1471 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1472 | __be32 *ret) | |
1473 | { | |
1474 | struct nfsd4_session *session; | |
1475 | __be32 status = nfserr_badsession; | |
1476 | ||
1477 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1478 | if (!session) | |
1479 | goto out; | |
1480 | status = nfsd4_get_session_locked(session); | |
1481 | if (status) | |
1482 | session = NULL; | |
1483 | out: | |
1484 | *ret = status; | |
1485 | return session; | |
1486 | } | |
1487 | ||
9089f1b4 | 1488 | /* caller must hold client_lock */ |
7116ed6b | 1489 | static void |
5282fd72 | 1490 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1491 | { |
0a880a28 TM |
1492 | struct nfs4_client *clp = ses->se_client; |
1493 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1494 | ||
1495 | lockdep_assert_held(&nn->client_lock); | |
1496 | ||
7116ed6b | 1497 | list_del(&ses->se_hash); |
4c649378 | 1498 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1499 | list_del(&ses->se_perclnt); |
4c649378 | 1500 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1501 | } |
1502 | ||
1da177e4 LT |
1503 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1504 | static int | |
2c142baa | 1505 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1506 | { |
2c142baa | 1507 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1508 | return 0; |
60adfc50 | 1509 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1510 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1511 | return 1; |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * XXX Should we use a slab cache ? | |
1516 | * This type of memory management is somewhat inefficient, but we use it | |
1517 | * anyway since SETCLIENTID is not a common operation. | |
1518 | */ | |
35bba9a3 | 1519 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1520 | { |
1521 | struct nfs4_client *clp; | |
d4f0489f | 1522 | int i; |
1da177e4 | 1523 | |
35bba9a3 BF |
1524 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1525 | if (clp == NULL) | |
1526 | return NULL; | |
67114fe6 | 1527 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
d4f0489f TM |
1528 | if (clp->cl_name.data == NULL) |
1529 | goto err_no_name; | |
1530 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * | |
1531 | OWNER_HASH_SIZE, GFP_KERNEL); | |
1532 | if (!clp->cl_ownerstr_hashtbl) | |
1533 | goto err_no_hashtbl; | |
1534 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1535 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
35bba9a3 | 1536 | clp->cl_name.len = name.len; |
5694c93e TM |
1537 | INIT_LIST_HEAD(&clp->cl_sessions); |
1538 | idr_init(&clp->cl_stateids); | |
1539 | atomic_set(&clp->cl_refcount, 0); | |
1540 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1541 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1542 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1543 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1544 | INIT_LIST_HEAD(&clp->cl_lru); | |
1545 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1546 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1547 | spin_lock_init(&clp->cl_lock); | |
1548 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1549 | return clp; |
d4f0489f TM |
1550 | err_no_hashtbl: |
1551 | kfree(clp->cl_name.data); | |
1552 | err_no_name: | |
1553 | kfree(clp); | |
1554 | return NULL; | |
1da177e4 LT |
1555 | } |
1556 | ||
4dd86e15 | 1557 | static void |
1da177e4 LT |
1558 | free_client(struct nfs4_client *clp) |
1559 | { | |
792c95dd BF |
1560 | while (!list_empty(&clp->cl_sessions)) { |
1561 | struct nfsd4_session *ses; | |
1562 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1563 | se_perclnt); | |
1564 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1565 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1566 | free_session(ses); | |
792c95dd | 1567 | } |
4cb57e30 | 1568 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1569 | free_svc_cred(&clp->cl_cred); |
d4f0489f | 1570 | kfree(clp->cl_ownerstr_hashtbl); |
1da177e4 | 1571 | kfree(clp->cl_name.data); |
2d32b29a | 1572 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1573 | kfree(clp); |
1574 | } | |
1575 | ||
84d38ac9 | 1576 | /* must be called under the client_lock */ |
4beb345b | 1577 | static void |
84d38ac9 BH |
1578 | unhash_client_locked(struct nfs4_client *clp) |
1579 | { | |
4beb345b | 1580 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
1581 | struct nfsd4_session *ses; |
1582 | ||
0a880a28 TM |
1583 | lockdep_assert_held(&nn->client_lock); |
1584 | ||
4beb345b TM |
1585 | /* Mark the client as expired! */ |
1586 | clp->cl_time = 0; | |
1587 | /* Make it invisible */ | |
1588 | if (!list_empty(&clp->cl_idhash)) { | |
1589 | list_del_init(&clp->cl_idhash); | |
1590 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
1591 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
1592 | else | |
1593 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
1594 | } | |
1595 | list_del_init(&clp->cl_lru); | |
4c649378 | 1596 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1597 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1598 | list_del_init(&ses->se_hash); | |
4c649378 | 1599 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1600 | } |
1601 | ||
1da177e4 | 1602 | static void |
4beb345b TM |
1603 | unhash_client(struct nfs4_client *clp) |
1604 | { | |
1605 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1606 | ||
1607 | spin_lock(&nn->client_lock); | |
1608 | unhash_client_locked(clp); | |
1609 | spin_unlock(&nn->client_lock); | |
1610 | } | |
1611 | ||
97403d95 JL |
1612 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
1613 | { | |
1614 | if (atomic_read(&clp->cl_refcount)) | |
1615 | return nfserr_jukebox; | |
1616 | unhash_client_locked(clp); | |
1617 | return nfs_ok; | |
1618 | } | |
1619 | ||
4beb345b TM |
1620 | static void |
1621 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 1622 | { |
fe0750e5 | 1623 | struct nfs4_openowner *oo; |
1da177e4 | 1624 | struct nfs4_delegation *dp; |
1da177e4 LT |
1625 | struct list_head reaplist; |
1626 | ||
1da177e4 | 1627 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1628 | spin_lock(&state_lock); |
ea1da636 N |
1629 | while (!list_empty(&clp->cl_delegations)) { |
1630 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1631 | unhash_delegation_locked(dp); |
1632 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1633 | } |
cdc97505 | 1634 | spin_unlock(&state_lock); |
1da177e4 LT |
1635 | while (!list_empty(&reaplist)) { |
1636 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1637 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1638 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1639 | } |
2d4a532d | 1640 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1641 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1642 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1643 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1644 | } |
ea1da636 | 1645 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 1646 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
d3134b10 | 1647 | atomic_inc(&oo->oo_owner.so_count); |
fe0750e5 | 1648 | release_openowner(oo); |
1da177e4 | 1649 | } |
6ff8da08 | 1650 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1651 | if (clp->cl_cb_conn.cb_xprt) |
1652 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 1653 | free_client(clp); |
1da177e4 LT |
1654 | } |
1655 | ||
4beb345b TM |
1656 | static void |
1657 | destroy_client(struct nfs4_client *clp) | |
1658 | { | |
1659 | unhash_client(clp); | |
1660 | __destroy_client(clp); | |
1661 | } | |
1662 | ||
0d22f68f BF |
1663 | static void expire_client(struct nfs4_client *clp) |
1664 | { | |
4beb345b | 1665 | unhash_client(clp); |
0d22f68f | 1666 | nfsd4_client_record_remove(clp); |
4beb345b | 1667 | __destroy_client(clp); |
0d22f68f BF |
1668 | } |
1669 | ||
35bba9a3 BF |
1670 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1671 | { | |
1672 | memcpy(target->cl_verifier.data, source->data, | |
1673 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1674 | } |
1675 | ||
35bba9a3 BF |
1676 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1677 | { | |
1da177e4 LT |
1678 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1679 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1680 | } | |
1681 | ||
03a4e1f6 | 1682 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1683 | { |
03a4e1f6 BF |
1684 | if (source->cr_principal) { |
1685 | target->cr_principal = | |
1686 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1687 | if (target->cr_principal == NULL) | |
1688 | return -ENOMEM; | |
1689 | } else | |
1690 | target->cr_principal = NULL; | |
d5497fc6 | 1691 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1692 | target->cr_uid = source->cr_uid; |
1693 | target->cr_gid = source->cr_gid; | |
1694 | target->cr_group_info = source->cr_group_info; | |
1695 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1696 | target->cr_gss_mech = source->cr_gss_mech; |
1697 | if (source->cr_gss_mech) | |
1698 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1699 | return 0; |
1da177e4 LT |
1700 | } |
1701 | ||
ac55fdc4 JL |
1702 | static long long |
1703 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1704 | { | |
1705 | long long res; | |
1706 | ||
1707 | res = o1->len - o2->len; | |
1708 | if (res) | |
1709 | return res; | |
1710 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1711 | } | |
1712 | ||
35bba9a3 | 1713 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1714 | { |
a55370a3 | 1715 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | static int | |
599e0a22 BF |
1719 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1720 | { | |
1721 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1722 | } |
1723 | ||
1724 | static int | |
599e0a22 BF |
1725 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1726 | { | |
1727 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1728 | } |
1729 | ||
8fbba96e BF |
1730 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1731 | { | |
1732 | int i; | |
1733 | ||
1734 | if (g1->ngroups != g2->ngroups) | |
1735 | return false; | |
1736 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1737 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1738 | return false; |
1739 | return true; | |
1740 | } | |
1741 | ||
68eb3508 BF |
1742 | /* |
1743 | * RFC 3530 language requires clid_inuse be returned when the | |
1744 | * "principal" associated with a requests differs from that previously | |
1745 | * used. We use uid, gid's, and gss principal string as our best | |
1746 | * approximation. We also don't want to allow non-gss use of a client | |
1747 | * established using gss: in theory cr_principal should catch that | |
1748 | * change, but in practice cr_principal can be null even in the gss case | |
1749 | * since gssd doesn't always pass down a principal string. | |
1750 | */ | |
1751 | static bool is_gss_cred(struct svc_cred *cr) | |
1752 | { | |
1753 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1754 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1755 | } | |
1756 | ||
1757 | ||
5559b50a | 1758 | static bool |
599e0a22 BF |
1759 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1760 | { | |
68eb3508 | 1761 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1762 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1763 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1764 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1765 | return false; | |
1766 | if (cr1->cr_principal == cr2->cr_principal) | |
1767 | return true; | |
1768 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1769 | return false; | |
5559b50a | 1770 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1771 | } |
1772 | ||
57266a6e BF |
1773 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1774 | { | |
1775 | struct svc_cred *cr = &rqstp->rq_cred; | |
1776 | u32 service; | |
1777 | ||
c4720591 BF |
1778 | if (!cr->cr_gss_mech) |
1779 | return false; | |
57266a6e BF |
1780 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1781 | return service == RPC_GSS_SVC_INTEGRITY || | |
1782 | service == RPC_GSS_SVC_PRIVACY; | |
1783 | } | |
1784 | ||
1785 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1786 | { | |
1787 | struct svc_cred *cr = &rqstp->rq_cred; | |
1788 | ||
1789 | if (!cl->cl_mach_cred) | |
1790 | return true; | |
1791 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1792 | return false; | |
1793 | if (!svc_rqst_integrity_protected(rqstp)) | |
1794 | return false; | |
1795 | if (!cr->cr_principal) | |
1796 | return false; | |
1797 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1798 | } | |
1799 | ||
294ac32e | 1800 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 1801 | { |
ab4684d1 | 1802 | __be32 verf[2]; |
1da177e4 | 1803 | |
f419992c JL |
1804 | /* |
1805 | * This is opaque to client, so no need to byte-swap. Use | |
1806 | * __force to keep sparse happy | |
1807 | */ | |
1808 | verf[0] = (__force __be32)get_seconds(); | |
294ac32e | 1809 | verf[1] = (__force __be32)nn->clientid_counter; |
ab4684d1 | 1810 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1811 | } |
1812 | ||
294ac32e JL |
1813 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
1814 | { | |
1815 | clp->cl_clientid.cl_boot = nn->boot_time; | |
1816 | clp->cl_clientid.cl_id = nn->clientid_counter++; | |
1817 | gen_confirm(clp, nn); | |
1818 | } | |
1819 | ||
4770d722 JL |
1820 | static struct nfs4_stid * |
1821 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1822 | { |
3abdb607 BF |
1823 | struct nfs4_stid *ret; |
1824 | ||
1825 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1826 | if (!ret || !ret->sc_type) | |
1827 | return NULL; | |
1828 | return ret; | |
4d71ab87 BF |
1829 | } |
1830 | ||
4770d722 JL |
1831 | static struct nfs4_stid * |
1832 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1833 | { |
1834 | struct nfs4_stid *s; | |
4d71ab87 | 1835 | |
4770d722 JL |
1836 | spin_lock(&cl->cl_lock); |
1837 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1838 | if (s != NULL) { |
1839 | if (typemask & s->sc_type) | |
1840 | atomic_inc(&s->sc_count); | |
1841 | else | |
1842 | s = NULL; | |
1843 | } | |
4770d722 JL |
1844 | spin_unlock(&cl->cl_lock); |
1845 | return s; | |
4581d140 BF |
1846 | } |
1847 | ||
2216d449 | 1848 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1849 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1850 | { | |
1851 | struct nfs4_client *clp; | |
1852 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1853 | int ret; |
c212cecf | 1854 | struct net *net = SVC_NET(rqstp); |
b09333c4 RL |
1855 | |
1856 | clp = alloc_client(name); | |
1857 | if (clp == NULL) | |
1858 | return NULL; | |
1859 | ||
03a4e1f6 BF |
1860 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1861 | if (ret) { | |
03a4e1f6 | 1862 | free_client(clp); |
03a4e1f6 | 1863 | return NULL; |
b09333c4 | 1864 | } |
02e1215f | 1865 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1866 | clp->cl_time = get_seconds(); |
b09333c4 | 1867 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1868 | copy_verf(clp, verf); |
1869 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
edd76786 | 1870 | clp->cl_cb_session = NULL; |
c212cecf | 1871 | clp->net = net; |
b09333c4 RL |
1872 | return clp; |
1873 | } | |
1874 | ||
fd39ca9a | 1875 | static void |
ac55fdc4 JL |
1876 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1877 | { | |
1878 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1879 | struct nfs4_client *clp; | |
1880 | ||
1881 | while (*new) { | |
1882 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1883 | parent = *new; | |
1884 | ||
1885 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1886 | new = &((*new)->rb_left); | |
1887 | else | |
1888 | new = &((*new)->rb_right); | |
1889 | } | |
1890 | ||
1891 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1892 | rb_insert_color(&new_clp->cl_namenode, root); | |
1893 | } | |
1894 | ||
1895 | static struct nfs4_client * | |
1896 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1897 | { | |
1898 | long long cmp; | |
1899 | struct rb_node *node = root->rb_node; | |
1900 | struct nfs4_client *clp; | |
1901 | ||
1902 | while (node) { | |
1903 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1904 | cmp = compare_blob(&clp->cl_name, name); | |
1905 | if (cmp > 0) | |
1906 | node = node->rb_left; | |
1907 | else if (cmp < 0) | |
1908 | node = node->rb_right; | |
1909 | else | |
1910 | return clp; | |
1911 | } | |
1912 | return NULL; | |
1913 | } | |
1914 | ||
1915 | static void | |
1916 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1917 | { |
1918 | unsigned int idhashval; | |
0a7ec377 | 1919 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1920 | |
0a880a28 TM |
1921 | lockdep_assert_held(&nn->client_lock); |
1922 | ||
ac55fdc4 | 1923 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1924 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1925 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1926 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 1927 | renew_client_locked(clp); |
1da177e4 LT |
1928 | } |
1929 | ||
fd39ca9a | 1930 | static void |
1da177e4 LT |
1931 | move_to_confirmed(struct nfs4_client *clp) |
1932 | { | |
1933 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1934 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1935 | |
0a880a28 TM |
1936 | lockdep_assert_held(&nn->client_lock); |
1937 | ||
1da177e4 | 1938 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 1939 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1940 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1941 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1942 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 1943 | renew_client_locked(clp); |
1da177e4 LT |
1944 | } |
1945 | ||
1946 | static struct nfs4_client * | |
bfa85e83 | 1947 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1948 | { |
1949 | struct nfs4_client *clp; | |
1950 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1951 | ||
bfa85e83 | 1952 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1953 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1954 | if ((bool)clp->cl_minorversion != sessions) |
1955 | return NULL; | |
3dbacee6 | 1956 | renew_client_locked(clp); |
1da177e4 | 1957 | return clp; |
a50d2ad1 | 1958 | } |
1da177e4 LT |
1959 | } |
1960 | return NULL; | |
1961 | } | |
1962 | ||
bfa85e83 BF |
1963 | static struct nfs4_client * |
1964 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1965 | { | |
1966 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1967 | ||
0a880a28 | 1968 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
1969 | return find_client_in_id_table(tbl, clid, sessions); |
1970 | } | |
1971 | ||
1da177e4 | 1972 | static struct nfs4_client * |
0a7ec377 | 1973 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1974 | { |
bfa85e83 | 1975 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1976 | |
0a880a28 | 1977 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 1978 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1979 | } |
1980 | ||
6e5f15c9 | 1981 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1982 | { |
6e5f15c9 | 1983 | return clp->cl_exchange_flags != 0; |
e203d506 | 1984 | } |
a1bcecd2 | 1985 | |
28ce6054 | 1986 | static struct nfs4_client * |
382a62e7 | 1987 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1988 | { |
0a880a28 | 1989 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 1990 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1991 | } |
1992 | ||
1993 | static struct nfs4_client * | |
a99454aa | 1994 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1995 | { |
0a880a28 | 1996 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 1997 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1998 | } |
1999 | ||
fd39ca9a | 2000 | static void |
6f3d772f | 2001 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2002 | { |
07263f1e | 2003 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2004 | struct sockaddr *sa = svc_addr(rqstp); |
2005 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2006 | unsigned short expected_family; |
2007 | ||
2008 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2009 | if (se->se_callback_netid_len == 3 && | |
2010 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2011 | expected_family = AF_INET; | |
2012 | else if (se->se_callback_netid_len == 4 && | |
2013 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2014 | expected_family = AF_INET6; | |
2015 | else | |
1da177e4 LT |
2016 | goto out_err; |
2017 | ||
c212cecf | 2018 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2019 | se->se_callback_addr_len, |
07263f1e BF |
2020 | (struct sockaddr *)&conn->cb_addr, |
2021 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2022 | |
07263f1e | 2023 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2024 | goto out_err; |
aa9a4ec7 | 2025 | |
07263f1e BF |
2026 | if (conn->cb_addr.ss_family == AF_INET6) |
2027 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2028 | |
07263f1e BF |
2029 | conn->cb_prog = se->se_callback_prog; |
2030 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2031 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2032 | return; |
2033 | out_err: | |
07263f1e BF |
2034 | conn->cb_addr.ss_family = AF_UNSPEC; |
2035 | conn->cb_addrlen = 0; | |
849823c5 | 2036 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2037 | "will not receive delegations\n", |
2038 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2039 | ||
1da177e4 LT |
2040 | return; |
2041 | } | |
2042 | ||
074fe897 | 2043 | /* |
067e1ace | 2044 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2045 | */ |
b607664e | 2046 | static void |
074fe897 | 2047 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2048 | { |
f5236013 | 2049 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2050 | struct nfsd4_slot *slot = resp->cstate.slot; |
2051 | unsigned int base; | |
074fe897 | 2052 | |
557ce264 | 2053 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2054 | |
557ce264 AA |
2055 | slot->sl_opcnt = resp->opcnt; |
2056 | slot->sl_status = resp->cstate.status; | |
074fe897 | 2057 | |
bf5c43c8 | 2058 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 2059 | if (nfsd4_not_cached(resp)) { |
557ce264 | 2060 | slot->sl_datalen = 0; |
bf864a31 | 2061 | return; |
074fe897 | 2062 | } |
f5236013 BF |
2063 | base = resp->cstate.data_offset; |
2064 | slot->sl_datalen = buf->len - base; | |
2065 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
2066 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
2067 | return; | |
074fe897 AA |
2068 | } |
2069 | ||
2070 | /* | |
abfabf8c AA |
2071 | * Encode the replay sequence operation from the slot values. |
2072 | * If cachethis is FALSE encode the uncached rep error on the next | |
2073 | * operation which sets resp->p and increments resp->opcnt for | |
2074 | * nfs4svc_encode_compoundres. | |
074fe897 | 2075 | * |
074fe897 | 2076 | */ |
abfabf8c AA |
2077 | static __be32 |
2078 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2079 | struct nfsd4_compoundres *resp) | |
074fe897 | 2080 | { |
abfabf8c AA |
2081 | struct nfsd4_op *op; |
2082 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2083 | |
abfabf8c AA |
2084 | /* Encode the replayed sequence operation */ |
2085 | op = &args->ops[resp->opcnt - 1]; | |
2086 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2087 | |
abfabf8c | 2088 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 2089 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
2090 | op = &args->ops[resp->opcnt++]; |
2091 | op->status = nfserr_retry_uncached_rep; | |
2092 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2093 | } |
abfabf8c | 2094 | return op->status; |
074fe897 AA |
2095 | } |
2096 | ||
2097 | /* | |
557ce264 AA |
2098 | * The sequence operation is not cached because we can use the slot and |
2099 | * session values. | |
074fe897 | 2100 | */ |
3ca2eb98 | 2101 | static __be32 |
bf864a31 AA |
2102 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2103 | struct nfsd4_sequence *seq) | |
074fe897 | 2104 | { |
557ce264 | 2105 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2106 | struct xdr_stream *xdr = &resp->xdr; |
2107 | __be32 *p; | |
074fe897 AA |
2108 | __be32 status; |
2109 | ||
557ce264 | 2110 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2111 | |
abfabf8c | 2112 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2113 | if (status) |
abfabf8c | 2114 | return status; |
074fe897 | 2115 | |
f5236013 BF |
2116 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2117 | if (!p) { | |
2118 | WARN_ON_ONCE(1); | |
2119 | return nfserr_serverfault; | |
2120 | } | |
2121 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2122 | xdr_commit_encode(xdr); | |
074fe897 | 2123 | |
557ce264 | 2124 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2125 | return slot->sl_status; |
074fe897 AA |
2126 | } |
2127 | ||
0733d213 AA |
2128 | /* |
2129 | * Set the exchange_id flags returned by the server. | |
2130 | */ | |
2131 | static void | |
2132 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2133 | { | |
2134 | /* pNFS is not supported */ | |
2135 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
2136 | ||
2137 | /* Referrals are supported, Migration is not. */ | |
2138 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2139 | ||
2140 | /* set the wire flags to return to client. */ | |
2141 | clid->flags = new->cl_exchange_flags; | |
2142 | } | |
2143 | ||
631fc9ea BF |
2144 | static bool client_has_state(struct nfs4_client *clp) |
2145 | { | |
2146 | /* | |
2147 | * Note clp->cl_openowners check isn't quite right: there's no | |
2148 | * need to count owners without stateid's. | |
2149 | * | |
2150 | * Also note we should probably be using this in 4.0 case too. | |
2151 | */ | |
6eccece9 BF |
2152 | return !list_empty(&clp->cl_openowners) |
2153 | || !list_empty(&clp->cl_delegations) | |
2154 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2155 | } |
2156 | ||
069b6ad4 AA |
2157 | __be32 |
2158 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2159 | struct nfsd4_compound_state *cstate, | |
2160 | struct nfsd4_exchange_id *exid) | |
2161 | { | |
3dbacee6 TM |
2162 | struct nfs4_client *conf, *new; |
2163 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 2164 | __be32 status; |
363168b4 | 2165 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2166 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2167 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2168 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2169 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2170 | |
363168b4 | 2171 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2172 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2173 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2174 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2175 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2176 | |
a084daf5 | 2177 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2178 | return nfserr_inval; |
2179 | ||
0733d213 | 2180 | switch (exid->spa_how) { |
57266a6e BF |
2181 | case SP4_MACH_CRED: |
2182 | if (!svc_rqst_integrity_protected(rqstp)) | |
2183 | return nfserr_inval; | |
0733d213 AA |
2184 | case SP4_NONE: |
2185 | break; | |
063b0fb9 BF |
2186 | default: /* checked by xdr code */ |
2187 | WARN_ON_ONCE(1); | |
0733d213 | 2188 | case SP4_SSV: |
dd30333c | 2189 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2190 | } |
2191 | ||
5cc40fd7 TM |
2192 | new = create_client(exid->clname, rqstp, &verf); |
2193 | if (new == NULL) | |
2194 | return nfserr_jukebox; | |
2195 | ||
2dbb269d | 2196 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 2197 | spin_lock(&nn->client_lock); |
382a62e7 | 2198 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2199 | if (conf) { |
83e08fd4 BF |
2200 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2201 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2202 | ||
136e658d BF |
2203 | if (update) { |
2204 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2205 | status = nfserr_inval; |
1a308118 BF |
2206 | goto out; |
2207 | } | |
57266a6e BF |
2208 | if (!mach_creds_match(conf, rqstp)) { |
2209 | status = nfserr_wrong_cred; | |
2210 | goto out; | |
2211 | } | |
136e658d | 2212 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2213 | status = nfserr_perm; |
136e658d BF |
2214 | goto out; |
2215 | } | |
2216 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2217 | status = nfserr_not_same; |
2218 | goto out; | |
2219 | } | |
136e658d BF |
2220 | /* case 6 */ |
2221 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 2222 | goto out_copy; |
0733d213 | 2223 | } |
136e658d | 2224 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2225 | if (client_has_state(conf)) { |
2226 | status = nfserr_clid_inuse; | |
0733d213 AA |
2227 | goto out; |
2228 | } | |
0733d213 AA |
2229 | goto out_new; |
2230 | } | |
136e658d | 2231 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2232 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2233 | goto out_copy; |
2234 | } | |
2235 | /* case 5, client reboot */ | |
3dbacee6 | 2236 | conf = NULL; |
136e658d | 2237 | goto out_new; |
6ddbbbfe MS |
2238 | } |
2239 | ||
2dbb269d | 2240 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2241 | status = nfserr_noent; |
2242 | goto out; | |
0733d213 AA |
2243 | } |
2244 | ||
a99454aa | 2245 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2246 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 2247 | unhash_client_locked(unconf); |
0733d213 | 2248 | |
2dbb269d | 2249 | /* case 1 (normal case) */ |
0733d213 | 2250 | out_new: |
fd699b8a JL |
2251 | if (conf) { |
2252 | status = mark_client_expired_locked(conf); | |
2253 | if (status) | |
2254 | goto out; | |
2255 | } | |
4f540e29 | 2256 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2257 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2258 | |
c212cecf | 2259 | gen_clid(new, nn); |
ac55fdc4 | 2260 | add_to_unconfirmed(new); |
3dbacee6 | 2261 | swap(new, conf); |
0733d213 | 2262 | out_copy: |
5cc40fd7 TM |
2263 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
2264 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 2265 | |
5cc40fd7 TM |
2266 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
2267 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
2268 | |
2269 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 2270 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
2271 | status = nfs_ok; |
2272 | ||
2273 | out: | |
3dbacee6 | 2274 | spin_unlock(&nn->client_lock); |
5cc40fd7 | 2275 | if (new) |
3dbacee6 TM |
2276 | expire_client(new); |
2277 | if (unconf) | |
2278 | expire_client(unconf); | |
0733d213 | 2279 | return status; |
069b6ad4 AA |
2280 | } |
2281 | ||
57b7b43b | 2282 | static __be32 |
88e588d5 | 2283 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2284 | { |
88e588d5 AA |
2285 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2286 | slot_seqid); | |
b85d4c01 BH |
2287 | |
2288 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2289 | if (slot_inuse) { |
2290 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2291 | return nfserr_jukebox; |
2292 | else | |
2293 | return nfserr_seq_misordered; | |
2294 | } | |
f6d82485 | 2295 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2296 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2297 | return nfs_ok; |
88e588d5 | 2298 | if (seqid == slot_seqid) |
b85d4c01 | 2299 | return nfserr_replay_cache; |
b85d4c01 BH |
2300 | return nfserr_seq_misordered; |
2301 | } | |
2302 | ||
49557cc7 AA |
2303 | /* |
2304 | * Cache the create session result into the create session single DRC | |
2305 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2306 | * Do this for solo or embedded create session operations. | |
2307 | */ | |
2308 | static void | |
2309 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2310 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2311 | { |
2312 | slot->sl_status = nfserr; | |
2313 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2314 | } | |
2315 | ||
2316 | static __be32 | |
2317 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2318 | struct nfsd4_clid_slot *slot) | |
2319 | { | |
2320 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2321 | return slot->sl_status; | |
2322 | } | |
2323 | ||
1b74c25b MJ |
2324 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2325 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2326 | 1 + /* MIN tag is length with zero, only length */ \ | |
2327 | 3 + /* version, opcount, opcode */ \ | |
2328 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2329 | /* seqid, slotID, slotID, cache */ \ | |
2330 | 4 ) * sizeof(__be32)) | |
2331 | ||
2332 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2333 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2334 | 1 + /* status */ \ | |
2335 | 1 + /* MIN tag is length with zero, only length */ \ | |
2336 | 3 + /* opcount, opcode, opstatus*/ \ | |
2337 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2338 | /* seqid, slotID, slotID, slotID, status */ \ | |
2339 | 5 ) * sizeof(__be32)) | |
2340 | ||
55c760cf | 2341 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2342 | { |
55c760cf BF |
2343 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2344 | ||
373cd409 BF |
2345 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2346 | return nfserr_toosmall; | |
2347 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2348 | return nfserr_toosmall; | |
55c760cf BF |
2349 | ca->headerpadsz = 0; |
2350 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2351 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2352 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2353 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2354 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2355 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2356 | /* | |
2357 | * Note decreasing slot size below client's request may make it | |
2358 | * difficult for client to function correctly, whereas | |
2359 | * decreasing the number of slots will (just?) affect | |
2360 | * performance. When short on memory we therefore prefer to | |
2361 | * decrease number of slots instead of their size. Clients that | |
2362 | * request larger slots than they need will get poor results: | |
2363 | */ | |
2364 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2365 | if (!ca->maxreqs) | |
2366 | return nfserr_jukebox; | |
2367 | ||
373cd409 | 2368 | return nfs_ok; |
1b74c25b MJ |
2369 | } |
2370 | ||
8a891633 KM |
2371 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2372 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2373 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2374 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2375 | ||
06b332a5 | 2376 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2377 | { |
06b332a5 BF |
2378 | ca->headerpadsz = 0; |
2379 | ||
2380 | /* | |
2381 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2382 | * don't even do gss on the backchannel yet. But this is still | |
2383 | * less than 1k. Tighten up this estimate in the unlikely event | |
2384 | * it turns out to be a problem for some client: | |
2385 | */ | |
8a891633 | 2386 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2387 | return nfserr_toosmall; |
8a891633 | 2388 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2389 | return nfserr_toosmall; |
2390 | ca->maxresp_cached = 0; | |
2391 | if (ca->maxops < 2) | |
2392 | return nfserr_toosmall; | |
2393 | ||
2394 | return nfs_ok; | |
1b74c25b MJ |
2395 | } |
2396 | ||
b78724b7 BF |
2397 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2398 | { | |
2399 | switch (cbs->flavor) { | |
2400 | case RPC_AUTH_NULL: | |
2401 | case RPC_AUTH_UNIX: | |
2402 | return nfs_ok; | |
2403 | default: | |
2404 | /* | |
2405 | * GSS case: the spec doesn't allow us to return this | |
2406 | * error. But it also doesn't allow us not to support | |
2407 | * GSS. | |
2408 | * I'd rather this fail hard than return some error the | |
2409 | * client might think it can already handle: | |
2410 | */ | |
2411 | return nfserr_encr_alg_unsupp; | |
2412 | } | |
2413 | } | |
2414 | ||
069b6ad4 AA |
2415 | __be32 |
2416 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2417 | struct nfsd4_compound_state *cstate, | |
2418 | struct nfsd4_create_session *cr_ses) | |
2419 | { | |
363168b4 | 2420 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2421 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2422 | struct nfs4_client *old = NULL; |
ac7c46f2 | 2423 | struct nfsd4_session *new; |
81f0b2a4 | 2424 | struct nfsd4_conn *conn; |
49557cc7 | 2425 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2426 | __be32 status = 0; |
8daae4dc | 2427 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2428 | |
a62573dc MJ |
2429 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2430 | return nfserr_inval; | |
b78724b7 BF |
2431 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2432 | if (status) | |
2433 | return status; | |
55c760cf | 2434 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2435 | if (status) |
2436 | return status; | |
2437 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2438 | if (status) |
f403e450 | 2439 | goto out_release_drc_mem; |
81f0b2a4 | 2440 | status = nfserr_jukebox; |
60810e54 | 2441 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2442 | if (!new) |
2443 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2444 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2445 | if (!conn) | |
2446 | goto out_free_session; | |
a62573dc | 2447 | |
d20c11d8 | 2448 | spin_lock(&nn->client_lock); |
0a7ec377 | 2449 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2450 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2451 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2452 | |
2453 | if (conf) { | |
57266a6e BF |
2454 | status = nfserr_wrong_cred; |
2455 | if (!mach_creds_match(conf, rqstp)) | |
2456 | goto out_free_conn; | |
49557cc7 AA |
2457 | cs_slot = &conf->cl_cs_slot; |
2458 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2459 | if (status == nfserr_replay_cache) { |
49557cc7 | 2460 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2461 | goto out_free_conn; |
49557cc7 | 2462 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2463 | status = nfserr_seq_misordered; |
81f0b2a4 | 2464 | goto out_free_conn; |
ec6b5d7b | 2465 | } |
ec6b5d7b AA |
2466 | } else if (unconf) { |
2467 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 2468 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2469 | status = nfserr_clid_inuse; |
81f0b2a4 | 2470 | goto out_free_conn; |
ec6b5d7b | 2471 | } |
57266a6e BF |
2472 | status = nfserr_wrong_cred; |
2473 | if (!mach_creds_match(unconf, rqstp)) | |
2474 | goto out_free_conn; | |
49557cc7 AA |
2475 | cs_slot = &unconf->cl_cs_slot; |
2476 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2477 | if (status) { |
2478 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2479 | status = nfserr_seq_misordered; |
81f0b2a4 | 2480 | goto out_free_conn; |
ec6b5d7b | 2481 | } |
382a62e7 | 2482 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 2483 | if (old) { |
d20c11d8 | 2484 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
2485 | if (status) { |
2486 | old = NULL; | |
221a6876 | 2487 | goto out_free_conn; |
7abea1e8 | 2488 | } |
221a6876 | 2489 | } |
8f9d3d3b | 2490 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2491 | conf = unconf; |
2492 | } else { | |
2493 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2494 | goto out_free_conn; |
ec6b5d7b | 2495 | } |
81f0b2a4 | 2496 | status = nfs_ok; |
408b79bc BF |
2497 | /* |
2498 | * We do not support RDMA or persistent sessions | |
2499 | */ | |
2500 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2501 | cr_ses->flags &= ~SESSION4_RDMA; | |
2502 | ||
81f0b2a4 | 2503 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 2504 | nfsd4_get_session_locked(new); |
81f0b2a4 | 2505 | |
ac7c46f2 | 2506 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2507 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2508 | cs_slot->sl_seqid++; |
49557cc7 | 2509 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2510 | |
d20c11d8 | 2511 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 2512 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
2513 | spin_unlock(&nn->client_lock); |
2514 | /* init connection and backchannel */ | |
2515 | nfsd4_init_conn(rqstp, conn, new); | |
2516 | nfsd4_put_session(new); | |
d20c11d8 JL |
2517 | if (old) |
2518 | expire_client(old); | |
ec6b5d7b | 2519 | return status; |
81f0b2a4 | 2520 | out_free_conn: |
d20c11d8 | 2521 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 2522 | free_conn(conn); |
d20c11d8 JL |
2523 | if (old) |
2524 | expire_client(old); | |
81f0b2a4 BF |
2525 | out_free_session: |
2526 | __free_session(new); | |
55c760cf BF |
2527 | out_release_drc_mem: |
2528 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2529 | return status; |
069b6ad4 AA |
2530 | } |
2531 | ||
1d1bc8f2 BF |
2532 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2533 | { | |
2534 | switch (*dir) { | |
2535 | case NFS4_CDFC4_FORE: | |
2536 | case NFS4_CDFC4_BACK: | |
2537 | return nfs_ok; | |
2538 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2539 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2540 | *dir = NFS4_CDFC4_BOTH; | |
2541 | return nfs_ok; | |
2542 | }; | |
2543 | return nfserr_inval; | |
2544 | } | |
2545 | ||
cb73a9f4 BF |
2546 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2547 | { | |
2548 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2549 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2550 | __be32 status; |
cb73a9f4 | 2551 | |
b78724b7 BF |
2552 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2553 | if (status) | |
2554 | return status; | |
c9a49628 | 2555 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2556 | session->se_cb_prog = bc->bc_cb_program; |
2557 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2558 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2559 | |
2560 | nfsd4_probe_callback(session->se_client); | |
2561 | ||
2562 | return nfs_ok; | |
2563 | } | |
2564 | ||
1d1bc8f2 BF |
2565 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2566 | struct nfsd4_compound_state *cstate, | |
2567 | struct nfsd4_bind_conn_to_session *bcts) | |
2568 | { | |
2569 | __be32 status; | |
3ba63671 | 2570 | struct nfsd4_conn *conn; |
4f6e6c17 | 2571 | struct nfsd4_session *session; |
d4e19e70 TM |
2572 | struct net *net = SVC_NET(rqstp); |
2573 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2574 | |
2575 | if (!nfsd4_last_compound_op(rqstp)) | |
2576 | return nfserr_not_only_op; | |
c9a49628 | 2577 | spin_lock(&nn->client_lock); |
d4e19e70 | 2578 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2579 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2580 | if (!session) |
d4e19e70 | 2581 | goto out_no_session; |
57266a6e BF |
2582 | status = nfserr_wrong_cred; |
2583 | if (!mach_creds_match(session->se_client, rqstp)) | |
2584 | goto out; | |
1d1bc8f2 | 2585 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2586 | if (status) |
4f6e6c17 | 2587 | goto out; |
3ba63671 | 2588 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2589 | status = nfserr_jukebox; |
3ba63671 | 2590 | if (!conn) |
4f6e6c17 BF |
2591 | goto out; |
2592 | nfsd4_init_conn(rqstp, conn, session); | |
2593 | status = nfs_ok; | |
2594 | out: | |
d4e19e70 TM |
2595 | nfsd4_put_session(session); |
2596 | out_no_session: | |
4f6e6c17 | 2597 | return status; |
1d1bc8f2 BF |
2598 | } |
2599 | ||
5d4cec2f BF |
2600 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2601 | { | |
2602 | if (!session) | |
2603 | return 0; | |
2604 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2605 | } | |
2606 | ||
069b6ad4 AA |
2607 | __be32 |
2608 | nfsd4_destroy_session(struct svc_rqst *r, | |
2609 | struct nfsd4_compound_state *cstate, | |
2610 | struct nfsd4_destroy_session *sessionid) | |
2611 | { | |
e10e0cfc | 2612 | struct nfsd4_session *ses; |
abcdff09 | 2613 | __be32 status; |
f0f51f5c | 2614 | int ref_held_by_me = 0; |
d4e19e70 TM |
2615 | struct net *net = SVC_NET(r); |
2616 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2617 | |
abcdff09 | 2618 | status = nfserr_not_only_op; |
5d4cec2f | 2619 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2620 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2621 | goto out; |
f0f51f5c | 2622 | ref_held_by_me++; |
57716355 | 2623 | } |
e10e0cfc | 2624 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2625 | spin_lock(&nn->client_lock); |
d4e19e70 | 2626 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2627 | if (!ses) |
2628 | goto out_client_lock; | |
57266a6e BF |
2629 | status = nfserr_wrong_cred; |
2630 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2631 | goto out_put_session; |
f0f51f5c | 2632 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2633 | if (status) |
f0f51f5c | 2634 | goto out_put_session; |
e10e0cfc | 2635 | unhash_session(ses); |
c9a49628 | 2636 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2637 | |
84f5f7cc | 2638 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2639 | |
c9a49628 | 2640 | spin_lock(&nn->client_lock); |
e10e0cfc | 2641 | status = nfs_ok; |
f0f51f5c | 2642 | out_put_session: |
d4e19e70 | 2643 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2644 | out_client_lock: |
2645 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2646 | out: |
e10e0cfc | 2647 | return status; |
069b6ad4 AA |
2648 | } |
2649 | ||
a663bdd8 | 2650 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2651 | { |
2652 | struct nfsd4_conn *c; | |
2653 | ||
2654 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2655 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2656 | return c; |
2657 | } | |
2658 | } | |
2659 | return NULL; | |
2660 | } | |
2661 | ||
57266a6e | 2662 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2663 | { |
2664 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2665 | struct nfsd4_conn *c; |
57266a6e | 2666 | __be32 status = nfs_ok; |
21b75b01 | 2667 | int ret; |
328ead28 BF |
2668 | |
2669 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2670 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2671 | if (c) |
2672 | goto out_free; | |
2673 | status = nfserr_conn_not_bound_to_session; | |
2674 | if (clp->cl_mach_cred) | |
2675 | goto out_free; | |
328ead28 BF |
2676 | __nfsd4_hash_conn(new, ses); |
2677 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2678 | ret = nfsd4_register_conn(new); |
2679 | if (ret) | |
2680 | /* oops; xprt is already down: */ | |
2681 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2682 | return nfs_ok; |
2683 | out_free: | |
2684 | spin_unlock(&clp->cl_lock); | |
2685 | free_conn(new); | |
2686 | return status; | |
328ead28 BF |
2687 | } |
2688 | ||
868b89c3 MJ |
2689 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2690 | { | |
2691 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2692 | ||
2693 | return args->opcnt > session->se_fchannel.maxops; | |
2694 | } | |
2695 | ||
ae82a8d0 MJ |
2696 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2697 | struct nfsd4_session *session) | |
2698 | { | |
2699 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2700 | ||
2701 | return xb->len > session->se_fchannel.maxreq_sz; | |
2702 | } | |
2703 | ||
069b6ad4 | 2704 | __be32 |
b85d4c01 | 2705 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2706 | struct nfsd4_compound_state *cstate, |
2707 | struct nfsd4_sequence *seq) | |
2708 | { | |
f9bb94c4 | 2709 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2710 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2711 | struct nfsd4_session *session; |
221a6876 | 2712 | struct nfs4_client *clp; |
b85d4c01 | 2713 | struct nfsd4_slot *slot; |
a663bdd8 | 2714 | struct nfsd4_conn *conn; |
57b7b43b | 2715 | __be32 status; |
47ee5298 | 2716 | int buflen; |
d4e19e70 TM |
2717 | struct net *net = SVC_NET(rqstp); |
2718 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2719 | |
f9bb94c4 AA |
2720 | if (resp->opcnt != 1) |
2721 | return nfserr_sequence_pos; | |
2722 | ||
a663bdd8 BF |
2723 | /* |
2724 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2725 | * below. | |
2726 | */ | |
2727 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2728 | if (!conn) | |
2729 | return nfserr_jukebox; | |
2730 | ||
c9a49628 | 2731 | spin_lock(&nn->client_lock); |
d4e19e70 | 2732 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2733 | if (!session) |
221a6876 BF |
2734 | goto out_no_session; |
2735 | clp = session->se_client; | |
b85d4c01 | 2736 | |
868b89c3 MJ |
2737 | status = nfserr_too_many_ops; |
2738 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2739 | goto out_put_session; |
868b89c3 | 2740 | |
ae82a8d0 MJ |
2741 | status = nfserr_req_too_big; |
2742 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2743 | goto out_put_session; |
ae82a8d0 | 2744 | |
b85d4c01 | 2745 | status = nfserr_badslot; |
6c18ba9f | 2746 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2747 | goto out_put_session; |
b85d4c01 | 2748 | |
557ce264 | 2749 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2750 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2751 | ||
a8dfdaeb AA |
2752 | /* We do not negotiate the number of slots yet, so set the |
2753 | * maxslots to the session maxreqs which is used to encode | |
2754 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2755 | seq->maxslots = session->se_fchannel.maxreqs; | |
2756 | ||
73e79482 BF |
2757 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2758 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2759 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2760 | status = nfserr_seq_misordered; |
2761 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2762 | goto out_put_session; |
b85d4c01 BH |
2763 | cstate->slot = slot; |
2764 | cstate->session = session; | |
4b24ca7d | 2765 | cstate->clp = clp; |
da3846a2 | 2766 | /* Return the cached reply status and set cstate->status |
557ce264 | 2767 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2768 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2769 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2770 | goto out; |
b85d4c01 BH |
2771 | } |
2772 | if (status) | |
66b2b9b2 | 2773 | goto out_put_session; |
b85d4c01 | 2774 | |
57266a6e | 2775 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2776 | conn = NULL; |
57266a6e BF |
2777 | if (status) |
2778 | goto out_put_session; | |
328ead28 | 2779 | |
47ee5298 BF |
2780 | buflen = (seq->cachethis) ? |
2781 | session->se_fchannel.maxresp_cached : | |
2782 | session->se_fchannel.maxresp_sz; | |
2783 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2784 | nfserr_rep_too_big; | |
a5cddc88 | 2785 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2786 | goto out_put_session; |
32aaa62e | 2787 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2788 | |
2789 | status = nfs_ok; | |
b85d4c01 | 2790 | /* Success! bump slot seqid */ |
b85d4c01 | 2791 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2792 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2793 | if (seq->cachethis) |
2794 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2795 | else |
2796 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2797 | |
2798 | cstate->slot = slot; | |
2799 | cstate->session = session; | |
4b24ca7d | 2800 | cstate->clp = clp; |
b85d4c01 | 2801 | |
b85d4c01 | 2802 | out: |
221a6876 BF |
2803 | switch (clp->cl_cb_state) { |
2804 | case NFSD4_CB_DOWN: | |
2805 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2806 | break; | |
2807 | case NFSD4_CB_FAULT: | |
2808 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2809 | break; | |
2810 | default: | |
2811 | seq->status_flags = 0; | |
aaf84eb9 | 2812 | } |
3bd64a5b BF |
2813 | if (!list_empty(&clp->cl_revoked)) |
2814 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2815 | out_no_session: |
3f42d2c4 KM |
2816 | if (conn) |
2817 | free_conn(conn); | |
c9a49628 | 2818 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2819 | return status; |
66b2b9b2 | 2820 | out_put_session: |
d4e19e70 | 2821 | nfsd4_put_session_locked(session); |
221a6876 | 2822 | goto out_no_session; |
069b6ad4 AA |
2823 | } |
2824 | ||
b607664e TM |
2825 | void |
2826 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2827 | { | |
2828 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2829 | ||
2830 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2831 | if (cs->status != nfserr_replay_cache) { |
2832 | nfsd4_store_cache_entry(resp); | |
2833 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2834 | } | |
d4e19e70 | 2835 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2836 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2837 | } else if (cs->clp) |
2838 | put_client_renew(cs->clp); | |
b607664e TM |
2839 | } |
2840 | ||
345c2842 MJ |
2841 | __be32 |
2842 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2843 | { | |
6b10ad19 TM |
2844 | struct nfs4_client *conf, *unconf; |
2845 | struct nfs4_client *clp = NULL; | |
57b7b43b | 2846 | __be32 status = 0; |
8daae4dc | 2847 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 2848 | |
6b10ad19 | 2849 | spin_lock(&nn->client_lock); |
0a7ec377 | 2850 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2851 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2852 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2853 | |
2854 | if (conf) { | |
c0293b01 | 2855 | if (client_has_state(conf)) { |
345c2842 MJ |
2856 | status = nfserr_clientid_busy; |
2857 | goto out; | |
2858 | } | |
fd699b8a JL |
2859 | status = mark_client_expired_locked(conf); |
2860 | if (status) | |
2861 | goto out; | |
6b10ad19 | 2862 | clp = conf; |
345c2842 MJ |
2863 | } else if (unconf) |
2864 | clp = unconf; | |
2865 | else { | |
2866 | status = nfserr_stale_clientid; | |
2867 | goto out; | |
2868 | } | |
57266a6e | 2869 | if (!mach_creds_match(clp, rqstp)) { |
6b10ad19 | 2870 | clp = NULL; |
57266a6e BF |
2871 | status = nfserr_wrong_cred; |
2872 | goto out; | |
2873 | } | |
6b10ad19 | 2874 | unhash_client_locked(clp); |
345c2842 | 2875 | out: |
6b10ad19 | 2876 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
2877 | if (clp) |
2878 | expire_client(clp); | |
345c2842 MJ |
2879 | return status; |
2880 | } | |
2881 | ||
4dc6ec00 BF |
2882 | __be32 |
2883 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2884 | { | |
57b7b43b | 2885 | __be32 status = 0; |
bcecf1cc | 2886 | |
4dc6ec00 BF |
2887 | if (rc->rca_one_fs) { |
2888 | if (!cstate->current_fh.fh_dentry) | |
2889 | return nfserr_nofilehandle; | |
2890 | /* | |
2891 | * We don't take advantage of the rca_one_fs case. | |
2892 | * That's OK, it's optional, we can safely ignore it. | |
2893 | */ | |
2894 | return nfs_ok; | |
2895 | } | |
bcecf1cc | 2896 | |
bcecf1cc | 2897 | status = nfserr_complete_already; |
a52d726b JL |
2898 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2899 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2900 | goto out; |
2901 | ||
2902 | status = nfserr_stale_clientid; | |
2903 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2904 | /* |
2905 | * The following error isn't really legal. | |
2906 | * But we only get here if the client just explicitly | |
2907 | * destroyed the client. Surely it no longer cares what | |
2908 | * error it gets back on an operation for the dead | |
2909 | * client. | |
2910 | */ | |
bcecf1cc MJ |
2911 | goto out; |
2912 | ||
2913 | status = nfs_ok; | |
2a4317c5 | 2914 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2915 | out: |
bcecf1cc | 2916 | return status; |
4dc6ec00 BF |
2917 | } |
2918 | ||
b37ad28b | 2919 | __be32 |
b591480b BF |
2920 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2921 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2922 | { |
a084daf5 | 2923 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2924 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
2925 | struct nfs4_client *conf, *new; |
2926 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 2927 | __be32 status; |
c212cecf SK |
2928 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2929 | ||
5cc40fd7 TM |
2930 | new = create_client(clname, rqstp, &clverifier); |
2931 | if (new == NULL) | |
2932 | return nfserr_jukebox; | |
63db4632 | 2933 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 2934 | spin_lock(&nn->client_lock); |
382a62e7 | 2935 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2936 | if (conf) { |
63db4632 | 2937 | /* case 0: */ |
1da177e4 | 2938 | status = nfserr_clid_inuse; |
e203d506 BF |
2939 | if (clp_used_exchangeid(conf)) |
2940 | goto out; | |
026722c2 | 2941 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2942 | char addr_str[INET6_ADDRSTRLEN]; |
2943 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2944 | sizeof(addr_str)); | |
2945 | dprintk("NFSD: setclientid: string in use by client " | |
2946 | "at %s\n", addr_str); | |
1da177e4 LT |
2947 | goto out; |
2948 | } | |
1da177e4 | 2949 | } |
a99454aa | 2950 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 2951 | if (unconf) |
3dbacee6 | 2952 | unhash_client_locked(unconf); |
34b232bb | 2953 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2954 | /* case 1: probable callback update */ |
1da177e4 | 2955 | copy_clid(new, conf); |
34b232bb | 2956 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2957 | gen_clid(new, nn); |
8323c3b2 | 2958 | new->cl_minorversion = 0; |
6f3d772f | 2959 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2960 | add_to_unconfirmed(new); |
1da177e4 LT |
2961 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2962 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2963 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 2964 | new = NULL; |
1da177e4 LT |
2965 | status = nfs_ok; |
2966 | out: | |
3dbacee6 | 2967 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
2968 | if (new) |
2969 | free_client(new); | |
3dbacee6 TM |
2970 | if (unconf) |
2971 | expire_client(unconf); | |
1da177e4 LT |
2972 | return status; |
2973 | } | |
2974 | ||
2975 | ||
b37ad28b | 2976 | __be32 |
b591480b BF |
2977 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2978 | struct nfsd4_compound_state *cstate, | |
2979 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2980 | { |
21ab45a4 | 2981 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 2982 | struct nfs4_client *old = NULL; |
1da177e4 LT |
2983 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2984 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2985 | __be32 status; |
7f2210fa | 2986 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2987 | |
2c142baa | 2988 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2989 | return nfserr_stale_clientid; |
21ab45a4 | 2990 | |
d20c11d8 | 2991 | spin_lock(&nn->client_lock); |
8daae4dc | 2992 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2993 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2994 | /* |
8695b90a BF |
2995 | * We try hard to give out unique clientid's, so if we get an |
2996 | * attempt to confirm the same clientid with a different cred, | |
2997 | * there's a bug somewhere. Let's charitably assume it's our | |
2998 | * bug. | |
a186e767 | 2999 | */ |
8695b90a BF |
3000 | status = nfserr_serverfault; |
3001 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
3002 | goto out; | |
3003 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3004 | goto out; | |
63db4632 | 3005 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
3006 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
3007 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 3008 | status = nfs_ok; |
90d700b7 BF |
3009 | else /* case 4: client hasn't noticed we rebooted yet? */ |
3010 | status = nfserr_stale_clientid; | |
3011 | goto out; | |
3012 | } | |
3013 | status = nfs_ok; | |
3014 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3015 | old = unconf; |
3016 | unhash_client_locked(old); | |
8695b90a | 3017 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3018 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3019 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3020 | if (old) { | |
3021 | status = mark_client_expired_locked(old); | |
7abea1e8 JL |
3022 | if (status) { |
3023 | old = NULL; | |
221a6876 | 3024 | goto out; |
7abea1e8 | 3025 | } |
221a6876 | 3026 | } |
8695b90a | 3027 | move_to_confirmed(unconf); |
d20c11d8 | 3028 | conf = unconf; |
08e8987c | 3029 | } |
d20c11d8 JL |
3030 | get_client_locked(conf); |
3031 | spin_unlock(&nn->client_lock); | |
3032 | nfsd4_probe_callback(conf); | |
3033 | spin_lock(&nn->client_lock); | |
3034 | put_client_renew_locked(conf); | |
1da177e4 | 3035 | out: |
d20c11d8 JL |
3036 | spin_unlock(&nn->client_lock); |
3037 | if (old) | |
3038 | expire_client(old); | |
1da177e4 LT |
3039 | return status; |
3040 | } | |
3041 | ||
32513b40 BF |
3042 | static struct nfs4_file *nfsd4_alloc_file(void) |
3043 | { | |
3044 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3045 | } | |
3046 | ||
1da177e4 | 3047 | /* OPEN Share state helper functions */ |
f9c00c3a | 3048 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 3049 | { |
ca943217 | 3050 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 3051 | |
950e0118 TM |
3052 | lockdep_assert_held(&state_lock); |
3053 | ||
32513b40 | 3054 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 3055 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
3056 | INIT_LIST_HEAD(&fp->fi_stateids); |
3057 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 3058 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
3059 | fp->fi_had_conflict = false; |
3060 | fp->fi_lease = NULL; | |
baeb4ff0 | 3061 | fp->fi_share_deny = 0; |
32513b40 BF |
3062 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
3063 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 3064 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
3065 | } |
3066 | ||
e8ff2a84 | 3067 | void |
1da177e4 LT |
3068 | nfsd4_free_slabs(void) |
3069 | { | |
abf1135b CH |
3070 | kmem_cache_destroy(openowner_slab); |
3071 | kmem_cache_destroy(lockowner_slab); | |
3072 | kmem_cache_destroy(file_slab); | |
3073 | kmem_cache_destroy(stateid_slab); | |
3074 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 3075 | } |
1da177e4 | 3076 | |
72083396 | 3077 | int |
e60d4398 N |
3078 | nfsd4_init_slabs(void) |
3079 | { | |
fe0750e5 BF |
3080 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
3081 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
3082 | if (openowner_slab == NULL) | |
abf1135b | 3083 | goto out; |
fe0750e5 | 3084 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 3085 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 3086 | if (lockowner_slab == NULL) |
abf1135b | 3087 | goto out_free_openowner_slab; |
e60d4398 | 3088 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 3089 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 3090 | if (file_slab == NULL) |
abf1135b | 3091 | goto out_free_lockowner_slab; |
5ac049ac | 3092 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 3093 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 3094 | if (stateid_slab == NULL) |
abf1135b | 3095 | goto out_free_file_slab; |
5b2d21c1 | 3096 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 3097 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 3098 | if (deleg_slab == NULL) |
abf1135b | 3099 | goto out_free_stateid_slab; |
e60d4398 | 3100 | return 0; |
abf1135b CH |
3101 | |
3102 | out_free_stateid_slab: | |
3103 | kmem_cache_destroy(stateid_slab); | |
3104 | out_free_file_slab: | |
3105 | kmem_cache_destroy(file_slab); | |
3106 | out_free_lockowner_slab: | |
3107 | kmem_cache_destroy(lockowner_slab); | |
3108 | out_free_openowner_slab: | |
3109 | kmem_cache_destroy(openowner_slab); | |
3110 | out: | |
e60d4398 N |
3111 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
3112 | return -ENOMEM; | |
1da177e4 LT |
3113 | } |
3114 | ||
ff194bd9 | 3115 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 3116 | { |
ff194bd9 BF |
3117 | rp->rp_status = nfserr_serverfault; |
3118 | rp->rp_buflen = 0; | |
3119 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
3120 | mutex_init(&rp->rp_mutex); |
3121 | } | |
3122 | ||
3123 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
3124 | struct nfs4_stateowner *so) | |
3125 | { | |
3126 | if (!nfsd4_has_session(cstate)) { | |
3127 | mutex_lock(&so->so_replay.rp_mutex); | |
3128 | cstate->replay_owner = so; | |
3129 | atomic_inc(&so->so_count); | |
3130 | } | |
3131 | } | |
3132 | ||
3133 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
3134 | { | |
3135 | struct nfs4_stateowner *so = cstate->replay_owner; | |
3136 | ||
3137 | if (so != NULL) { | |
3138 | cstate->replay_owner = NULL; | |
3139 | mutex_unlock(&so->so_replay.rp_mutex); | |
3140 | nfs4_put_stateowner(so); | |
3141 | } | |
1da177e4 LT |
3142 | } |
3143 | ||
fe0750e5 | 3144 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 3145 | { |
1da177e4 | 3146 | struct nfs4_stateowner *sop; |
1da177e4 | 3147 | |
fe0750e5 | 3148 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
3149 | if (!sop) |
3150 | return NULL; | |
3151 | ||
3152 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
3153 | if (!sop->so_owner.data) { | |
fe0750e5 | 3154 | kmem_cache_free(slab, sop); |
1da177e4 | 3155 | return NULL; |
ff194bd9 BF |
3156 | } |
3157 | sop->so_owner.len = owner->len; | |
3158 | ||
ea1da636 | 3159 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
3160 | sop->so_client = clp; |
3161 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 3162 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
3163 | return sop; |
3164 | } | |
3165 | ||
fe0750e5 | 3166 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 3167 | { |
d4f0489f | 3168 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 3169 | |
d4f0489f TM |
3170 | list_add(&oo->oo_owner.so_strhash, |
3171 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 3172 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
3173 | } |
3174 | ||
8f4b54c5 JL |
3175 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
3176 | { | |
d4f0489f | 3177 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
3178 | } |
3179 | ||
6b180f0b JL |
3180 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
3181 | { | |
3182 | struct nfs4_openowner *oo = openowner(so); | |
3183 | ||
3184 | kmem_cache_free(openowner_slab, oo); | |
3185 | } | |
3186 | ||
3187 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
3188 | .so_unhash = nfs4_unhash_openowner, |
3189 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
3190 | }; |
3191 | ||
fe0750e5 | 3192 | static struct nfs4_openowner * |
13d6f66b | 3193 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3194 | struct nfsd4_compound_state *cstate) |
3195 | { | |
13d6f66b | 3196 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 3197 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 3198 | |
fe0750e5 BF |
3199 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3200 | if (!oo) | |
ff194bd9 | 3201 | return NULL; |
6b180f0b | 3202 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3203 | oo->oo_owner.so_is_open_owner = 1; |
3204 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 3205 | oo->oo_flags = 0; |
db24b3b4 JL |
3206 | if (nfsd4_has_session(cstate)) |
3207 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3208 | oo->oo_time = 0; |
38c387b5 | 3209 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 3210 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
3211 | spin_lock(&clp->cl_lock); |
3212 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
3213 | if (ret == NULL) { |
3214 | hash_openowner(oo, clp, strhashval); | |
3215 | ret = oo; | |
3216 | } else | |
3217 | nfs4_free_openowner(&oo->oo_owner); | |
d4f0489f | 3218 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 3219 | return oo; |
1da177e4 LT |
3220 | } |
3221 | ||
996e0938 | 3222 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3223 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3224 | |
d6f2bc5d | 3225 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3226 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3227 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3228 | stp->st_stateowner = &oo->oo_owner; |
d3134b10 | 3229 | atomic_inc(&stp->st_stateowner->so_count); |
13cd2184 | 3230 | get_nfs4_file(fp); |
11b9164a | 3231 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3232 | stp->st_access_bmap = 0; |
3233 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3234 | stp->st_openstp = NULL; |
1c755dc1 JL |
3235 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3236 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3237 | spin_lock(&fp->fi_lock); |
3238 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3239 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3240 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3241 | } |
3242 | ||
d3134b10 JL |
3243 | /* |
3244 | * In the 4.0 case we need to keep the owners around a little while to handle | |
3245 | * CLOSE replay. We still do need to release any file access that is held by | |
3246 | * them before returning however. | |
3247 | */ | |
fd39ca9a | 3248 | static void |
d3134b10 | 3249 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 3250 | { |
217526e7 | 3251 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
3252 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
3253 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
3254 | nfsd_net_id); | |
73758fed | 3255 | |
fe0750e5 | 3256 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3257 | |
b401be22 JL |
3258 | /* |
3259 | * We know that we hold one reference via nfsd4_close, and another | |
3260 | * "persistent" reference for the client. If the refcount is higher | |
3261 | * than 2, then there are still calls in progress that are using this | |
3262 | * stateid. We can't put the sc_file reference until they are finished. | |
3263 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
3264 | * there should be no danger of the refcount going back up again at | |
3265 | * this point. | |
3266 | */ | |
3267 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); | |
3268 | ||
d3134b10 JL |
3269 | release_all_access(s); |
3270 | if (s->st_stid.sc_file) { | |
3271 | put_nfs4_file(s->st_stid.sc_file); | |
3272 | s->st_stid.sc_file = NULL; | |
3273 | } | |
217526e7 JL |
3274 | |
3275 | spin_lock(&nn->client_lock); | |
3276 | last = oo->oo_last_closed_stid; | |
d3134b10 | 3277 | oo->oo_last_closed_stid = s; |
73758fed | 3278 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3279 | oo->oo_time = get_seconds(); |
217526e7 JL |
3280 | spin_unlock(&nn->client_lock); |
3281 | if (last) | |
3282 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
3283 | } |
3284 | ||
1da177e4 LT |
3285 | /* search file_hashtbl[] for file */ |
3286 | static struct nfs4_file * | |
ca943217 | 3287 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3288 | { |
ca943217 | 3289 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3290 | struct nfs4_file *fp; |
3291 | ||
950e0118 TM |
3292 | lockdep_assert_held(&state_lock); |
3293 | ||
89876f8c | 3294 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3295 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3296 | get_nfs4_file(fp); |
1da177e4 | 3297 | return fp; |
13cd2184 | 3298 | } |
1da177e4 LT |
3299 | } |
3300 | return NULL; | |
3301 | } | |
3302 | ||
950e0118 | 3303 | static struct nfs4_file * |
ca943217 | 3304 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3305 | { |
3306 | struct nfs4_file *fp; | |
3307 | ||
3308 | spin_lock(&state_lock); | |
ca943217 | 3309 | fp = find_file_locked(fh); |
950e0118 TM |
3310 | spin_unlock(&state_lock); |
3311 | return fp; | |
3312 | } | |
3313 | ||
3314 | static struct nfs4_file * | |
f9c00c3a | 3315 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3316 | { |
3317 | struct nfs4_file *fp; | |
3318 | ||
3319 | spin_lock(&state_lock); | |
ca943217 | 3320 | fp = find_file_locked(fh); |
950e0118 | 3321 | if (fp == NULL) { |
f9c00c3a | 3322 | nfsd4_init_file(new, fh); |
950e0118 TM |
3323 | fp = new; |
3324 | } | |
3325 | spin_unlock(&state_lock); | |
3326 | ||
3327 | return fp; | |
3328 | } | |
3329 | ||
1da177e4 LT |
3330 | /* |
3331 | * Called to check deny when READ with all zero stateid or | |
3332 | * WRITE with all zero or all one stateid | |
3333 | */ | |
b37ad28b | 3334 | static __be32 |
1da177e4 LT |
3335 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3336 | { | |
1da177e4 | 3337 | struct nfs4_file *fp; |
baeb4ff0 | 3338 | __be32 ret = nfs_ok; |
1da177e4 | 3339 | |
ca943217 | 3340 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3341 | if (!fp) |
baeb4ff0 JL |
3342 | return ret; |
3343 | /* Check for conflicting share reservations */ | |
1d31a253 | 3344 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3345 | if (fp->fi_share_deny & deny_type) |
3346 | ret = nfserr_locked; | |
1d31a253 | 3347 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3348 | put_nfs4_file(fp); |
3349 | return ret; | |
1da177e4 LT |
3350 | } |
3351 | ||
02e1215f | 3352 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3353 | { |
11b9164a TM |
3354 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3355 | nfsd_net_id); | |
e8c69d17 | 3356 | |
11b9164a | 3357 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3358 | |
dff1399f | 3359 | /* |
f54fe962 JL |
3360 | * We can't do this in nfsd_break_deleg_cb because it is |
3361 | * already holding inode->i_lock. | |
3362 | * | |
dff1399f JL |
3363 | * If the dl_time != 0, then we know that it has already been |
3364 | * queued for a lease break. Don't queue it again. | |
3365 | */ | |
f54fe962 | 3366 | spin_lock(&state_lock); |
dff1399f | 3367 | if (dp->dl_time == 0) { |
dff1399f | 3368 | dp->dl_time = get_seconds(); |
02e1215f | 3369 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3370 | } |
02e1215f JL |
3371 | spin_unlock(&state_lock); |
3372 | } | |
1da177e4 | 3373 | |
02e1215f JL |
3374 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3375 | { | |
3376 | /* | |
3377 | * We're assuming the state code never drops its reference | |
3378 | * without first removing the lease. Since we're in this lease | |
3379 | * callback (and since the lease code is serialized by the kernel | |
3380 | * lock) we know the server hasn't removed the lease yet, we know | |
3381 | * it's safe to take a reference. | |
3382 | */ | |
72c0b0fb | 3383 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3384 | nfsd4_cb_recall(dp); |
3385 | } | |
3386 | ||
1c8c601a | 3387 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3388 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3389 | { | |
acfdf5c3 BF |
3390 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3391 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3392 | |
7fa10cd1 BF |
3393 | if (!fp) { |
3394 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3395 | return; | |
3396 | } | |
3397 | if (fp->fi_had_conflict) { | |
3398 | WARN(1, "duplicate break on %p\n", fp); | |
3399 | return; | |
3400 | } | |
0272e1fd BF |
3401 | /* |
3402 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3403 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3404 | * in time: |
0272e1fd BF |
3405 | */ |
3406 | fl->fl_break_time = 0; | |
1da177e4 | 3407 | |
02e1215f | 3408 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3409 | fp->fi_had_conflict = true; |
3410 | /* | |
3411 | * If there are no delegations on the list, then we can't count on this | |
3412 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3413 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3414 | * true should keep any new delegations from being hashed. | |
3415 | */ | |
3416 | if (list_empty(&fp->fi_delegations)) | |
3417 | fl->fl_break_time = jiffies; | |
3418 | else | |
3419 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3420 | nfsd_break_one_deleg(dp); | |
02e1215f | 3421 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3422 | } |
3423 | ||
1da177e4 LT |
3424 | static |
3425 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3426 | { | |
3427 | if (arg & F_UNLCK) | |
3428 | return lease_modify(onlist, arg); | |
3429 | else | |
3430 | return -EAGAIN; | |
3431 | } | |
3432 | ||
7b021967 | 3433 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3434 | .lm_break = nfsd_break_deleg_cb, |
3435 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3436 | }; |
3437 | ||
7a8711c9 BF |
3438 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3439 | { | |
3440 | if (nfsd4_has_session(cstate)) | |
3441 | return nfs_ok; | |
3442 | if (seqid == so->so_seqid - 1) | |
3443 | return nfserr_replay_me; | |
3444 | if (seqid == so->so_seqid) | |
3445 | return nfs_ok; | |
3446 | return nfserr_bad_seqid; | |
3447 | } | |
1da177e4 | 3448 | |
4b24ca7d JL |
3449 | static __be32 lookup_clientid(clientid_t *clid, |
3450 | struct nfsd4_compound_state *cstate, | |
3451 | struct nfsd_net *nn) | |
3452 | { | |
3453 | struct nfs4_client *found; | |
3454 | ||
3455 | if (cstate->clp) { | |
3456 | found = cstate->clp; | |
3457 | if (!same_clid(&found->cl_clientid, clid)) | |
3458 | return nfserr_stale_clientid; | |
3459 | return nfs_ok; | |
3460 | } | |
3461 | ||
3462 | if (STALE_CLIENTID(clid, nn)) | |
3463 | return nfserr_stale_clientid; | |
3464 | ||
3465 | /* | |
3466 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3467 | * cached already then we know this is for is for v4.0 and "sessions" | |
3468 | * will be false. | |
3469 | */ | |
3470 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 3471 | spin_lock(&nn->client_lock); |
4b24ca7d | 3472 | found = find_confirmed_client(clid, false, nn); |
3e339f96 TM |
3473 | if (!found) { |
3474 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 3475 | return nfserr_expired; |
3e339f96 TM |
3476 | } |
3477 | atomic_inc(&found->cl_refcount); | |
3478 | spin_unlock(&nn->client_lock); | |
4b24ca7d JL |
3479 | |
3480 | /* Cache the nfs4_client in cstate! */ | |
3481 | cstate->clp = found; | |
4b24ca7d JL |
3482 | return nfs_ok; |
3483 | } | |
3484 | ||
b37ad28b | 3485 | __be32 |
6668958f | 3486 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3487 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3488 | { |
1da177e4 LT |
3489 | clientid_t *clientid = &open->op_clientid; |
3490 | struct nfs4_client *clp = NULL; | |
3491 | unsigned int strhashval; | |
fe0750e5 | 3492 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3493 | __be32 status; |
1da177e4 | 3494 | |
2c142baa | 3495 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3496 | return nfserr_stale_clientid; |
32513b40 BF |
3497 | /* |
3498 | * In case we need it later, after we've already created the | |
3499 | * file and don't want to risk a further failure: | |
3500 | */ | |
3501 | open->op_file = nfsd4_alloc_file(); | |
3502 | if (open->op_file == NULL) | |
3503 | return nfserr_jukebox; | |
1da177e4 | 3504 | |
2d91e895 TM |
3505 | status = lookup_clientid(clientid, cstate, nn); |
3506 | if (status) | |
3507 | return status; | |
3508 | clp = cstate->clp; | |
3509 | ||
d4f0489f TM |
3510 | strhashval = ownerstr_hashval(&open->op_owner); |
3511 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
3512 | open->op_openowner = oo; |
3513 | if (!oo) { | |
bcf130f9 | 3514 | goto new_owner; |
1da177e4 | 3515 | } |
dad1c067 | 3516 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3517 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3518 | release_openowner(oo); |
3519 | open->op_openowner = NULL; | |
bcf130f9 | 3520 | goto new_owner; |
0f442aa2 | 3521 | } |
4cdc951b BF |
3522 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3523 | if (status) | |
3524 | return status; | |
4cdc951b | 3525 | goto alloc_stateid; |
bcf130f9 | 3526 | new_owner: |
13d6f66b | 3527 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3528 | if (oo == NULL) |
3529 | return nfserr_jukebox; | |
3530 | open->op_openowner = oo; | |
4cdc951b | 3531 | alloc_stateid: |
b49e084d | 3532 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3533 | if (!open->op_stp) |
3534 | return nfserr_jukebox; | |
0f442aa2 | 3535 | return nfs_ok; |
1da177e4 LT |
3536 | } |
3537 | ||
b37ad28b | 3538 | static inline __be32 |
4a6e43e6 N |
3539 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3540 | { | |
3541 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3542 | return nfserr_openmode; | |
3543 | else | |
3544 | return nfs_ok; | |
3545 | } | |
3546 | ||
f459e453 | 3547 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3548 | { |
f459e453 | 3549 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3550 | } |
3551 | ||
38c2f4b1 | 3552 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3553 | { |
f459e453 | 3554 | struct nfs4_stid *ret; |
24a0111e | 3555 | |
38c2f4b1 | 3556 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3557 | if (!ret) |
3558 | return NULL; | |
3559 | return delegstateid(ret); | |
24a0111e BF |
3560 | } |
3561 | ||
8b289b2c BF |
3562 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3563 | { | |
3564 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3565 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3566 | } | |
3567 | ||
b37ad28b | 3568 | static __be32 |
41d22663 | 3569 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3570 | struct nfs4_delegation **dp) |
3571 | { | |
3572 | int flags; | |
b37ad28b | 3573 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3574 | struct nfs4_delegation *deleg; |
567d9829 | 3575 | |
dcd94cc2 TM |
3576 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3577 | if (deleg == NULL) | |
c44c5eeb | 3578 | goto out; |
24a0111e | 3579 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3580 | status = nfs4_check_delegmode(deleg, flags); |
3581 | if (status) { | |
3582 | nfs4_put_stid(&deleg->dl_stid); | |
3583 | goto out; | |
3584 | } | |
3585 | *dp = deleg; | |
c44c5eeb | 3586 | out: |
8b289b2c | 3587 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3588 | return nfs_ok; |
3589 | if (status) | |
3590 | return status; | |
dad1c067 | 3591 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3592 | return nfs_ok; |
567d9829 N |
3593 | } |
3594 | ||
a46cb7f2 JL |
3595 | static struct nfs4_ol_stateid * |
3596 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3597 | { |
a46cb7f2 | 3598 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3599 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3600 | |
1d31a253 | 3601 | spin_lock(&fp->fi_lock); |
8beefa24 | 3602 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3603 | /* ignore lock owners */ |
3604 | if (local->st_stateowner->so_is_open_owner == 0) | |
3605 | continue; | |
baeb4ff0 | 3606 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3607 | ret = local; |
d6f2bc5d | 3608 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3609 | break; |
1d31a253 | 3610 | } |
1da177e4 | 3611 | } |
1d31a253 | 3612 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3613 | return ret; |
1da177e4 LT |
3614 | } |
3615 | ||
21fb4016 BF |
3616 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3617 | { | |
3618 | int flags = 0; | |
3619 | ||
3620 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3621 | flags |= NFSD_MAY_READ; | |
3622 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3623 | flags |= NFSD_MAY_WRITE; | |
3624 | return flags; | |
3625 | } | |
3626 | ||
7e6a72e5 CH |
3627 | static inline __be32 |
3628 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3629 | struct nfsd4_open *open) | |
3630 | { | |
3631 | struct iattr iattr = { | |
3632 | .ia_valid = ATTR_SIZE, | |
3633 | .ia_size = 0, | |
3634 | }; | |
3635 | if (!open->op_truncate) | |
3636 | return 0; | |
3637 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3638 | return nfserr_inval; | |
3639 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3640 | } | |
3641 | ||
0c12eaff | 3642 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3643 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3644 | struct nfsd4_open *open) | |
f9d7562f | 3645 | { |
de18643d | 3646 | struct file *filp = NULL; |
f9d7562f | 3647 | __be32 status; |
0c12eaff CB |
3648 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3649 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3650 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3651 | |
de18643d | 3652 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3653 | |
3654 | /* | |
3655 | * Are we trying to set a deny mode that would conflict with | |
3656 | * current access? | |
3657 | */ | |
3658 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3659 | if (status != nfs_ok) { | |
3660 | spin_unlock(&fp->fi_lock); | |
3661 | goto out; | |
3662 | } | |
3663 | ||
3664 | /* set access to the file */ | |
3665 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3666 | if (status != nfs_ok) { | |
3667 | spin_unlock(&fp->fi_lock); | |
3668 | goto out; | |
3669 | } | |
3670 | ||
3671 | /* Set access bits in stateid */ | |
3672 | old_access_bmap = stp->st_access_bmap; | |
3673 | set_access(open->op_share_access, stp); | |
3674 | ||
3675 | /* Set new deny mask */ | |
3676 | old_deny_bmap = stp->st_deny_bmap; | |
3677 | set_deny(open->op_share_deny, stp); | |
3678 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3679 | ||
f9d7562f | 3680 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3681 | spin_unlock(&fp->fi_lock); |
3682 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3683 | if (status) |
baeb4ff0 | 3684 | goto out_put_access; |
de18643d TM |
3685 | spin_lock(&fp->fi_lock); |
3686 | if (!fp->fi_fds[oflag]) { | |
3687 | fp->fi_fds[oflag] = filp; | |
3688 | filp = NULL; | |
3689 | } | |
f9d7562f | 3690 | } |
de18643d TM |
3691 | spin_unlock(&fp->fi_lock); |
3692 | if (filp) | |
3693 | fput(filp); | |
f9d7562f | 3694 | |
7e6a72e5 CH |
3695 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3696 | if (status) | |
3697 | goto out_put_access; | |
7e6a72e5 CH |
3698 | out: |
3699 | return status; | |
baeb4ff0 JL |
3700 | out_put_access: |
3701 | stp->st_access_bmap = old_access_bmap; | |
3702 | nfs4_file_put_access(fp, open->op_share_access); | |
3703 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3704 | goto out; | |
1da177e4 LT |
3705 | } |
3706 | ||
b37ad28b | 3707 | static __be32 |
dcef0413 | 3708 | 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 | 3709 | { |
b37ad28b | 3710 | __be32 status; |
baeb4ff0 | 3711 | unsigned char old_deny_bmap; |
1da177e4 | 3712 | |
6eb3a1d0 | 3713 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3714 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3715 | |
baeb4ff0 JL |
3716 | /* test and set deny mode */ |
3717 | spin_lock(&fp->fi_lock); | |
3718 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3719 | if (status == nfs_ok) { | |
3720 | old_deny_bmap = stp->st_deny_bmap; | |
3721 | set_deny(open->op_share_deny, stp); | |
3722 | fp->fi_share_deny |= | |
3723 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3724 | } | |
3725 | spin_unlock(&fp->fi_lock); | |
3726 | ||
3727 | if (status != nfs_ok) | |
1da177e4 | 3728 | return status; |
1da177e4 | 3729 | |
baeb4ff0 JL |
3730 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3731 | if (status != nfs_ok) | |
3732 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3733 | return status; | |
3734 | } | |
1da177e4 | 3735 | |
1da177e4 | 3736 | static void |
1255a8f3 | 3737 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3738 | { |
dad1c067 | 3739 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3740 | } |
3741 | ||
14a24e99 BF |
3742 | /* Should we give out recallable state?: */ |
3743 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3744 | { | |
3745 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3746 | return true; | |
3747 | /* | |
3748 | * In the sessions case, since we don't have to establish a | |
3749 | * separate connection for callbacks, we assume it's OK | |
3750 | * until we hear otherwise: | |
3751 | */ | |
3752 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3753 | } | |
3754 | ||
d564fbec | 3755 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3756 | { |
3757 | struct file_lock *fl; | |
3758 | ||
3759 | fl = locks_alloc_lock(); | |
3760 | if (!fl) | |
3761 | return NULL; | |
3762 | locks_init_lock(fl); | |
3763 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3764 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3765 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3766 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3767 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3768 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3769 | return fl; |
3770 | } | |
3771 | ||
99c41515 | 3772 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3773 | { |
11b9164a | 3774 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3775 | struct file_lock *fl; |
417c6629 JL |
3776 | struct file *filp; |
3777 | int status = 0; | |
edab9782 | 3778 | |
d564fbec | 3779 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3780 | if (!fl) |
3781 | return -ENOMEM; | |
417c6629 JL |
3782 | filp = find_readable_file(fp); |
3783 | if (!filp) { | |
3784 | /* We should always have a readable file here */ | |
3785 | WARN_ON_ONCE(1); | |
3786 | return -EBADF; | |
3787 | } | |
3788 | fl->fl_file = filp; | |
3789 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3790 | if (status) { | |
3791 | locks_free_lock(fl); | |
3792 | goto out_fput; | |
3793 | } | |
3794 | spin_lock(&state_lock); | |
3795 | spin_lock(&fp->fi_lock); | |
3796 | /* Did the lease get broken before we took the lock? */ | |
3797 | status = -EAGAIN; | |
3798 | if (fp->fi_had_conflict) | |
3799 | goto out_unlock; | |
3800 | /* Race breaker */ | |
3801 | if (fp->fi_lease) { | |
3802 | status = 0; | |
3803 | atomic_inc(&fp->fi_delegees); | |
3804 | hash_delegation_locked(dp, fp); | |
3805 | goto out_unlock; | |
3806 | } | |
acfdf5c3 | 3807 | fp->fi_lease = fl; |
417c6629 | 3808 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3809 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3810 | hash_delegation_locked(dp, fp); |
417c6629 | 3811 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3812 | spin_unlock(&state_lock); |
acfdf5c3 | 3813 | return 0; |
417c6629 JL |
3814 | out_unlock: |
3815 | spin_unlock(&fp->fi_lock); | |
3816 | spin_unlock(&state_lock); | |
3817 | out_fput: | |
3818 | fput(filp); | |
e873088f | 3819 | return status; |
acfdf5c3 BF |
3820 | } |
3821 | ||
0b26693c JL |
3822 | static struct nfs4_delegation * |
3823 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3824 | struct nfs4_file *fp) | |
acfdf5c3 | 3825 | { |
0b26693c JL |
3826 | int status; |
3827 | struct nfs4_delegation *dp; | |
417c6629 | 3828 | |
bf7bd3e9 | 3829 | if (fp->fi_had_conflict) |
0b26693c JL |
3830 | return ERR_PTR(-EAGAIN); |
3831 | ||
3832 | dp = alloc_init_deleg(clp, fh); | |
3833 | if (!dp) | |
3834 | return ERR_PTR(-ENOMEM); | |
3835 | ||
bf7bd3e9 | 3836 | get_nfs4_file(fp); |
417c6629 JL |
3837 | spin_lock(&state_lock); |
3838 | spin_lock(&fp->fi_lock); | |
11b9164a | 3839 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3840 | if (!fp->fi_lease) { |
3841 | spin_unlock(&fp->fi_lock); | |
3842 | spin_unlock(&state_lock); | |
0b26693c JL |
3843 | status = nfs4_setlease(dp); |
3844 | goto out; | |
417c6629 | 3845 | } |
cbf7a75b | 3846 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3847 | if (fp->fi_had_conflict) { |
417c6629 JL |
3848 | status = -EAGAIN; |
3849 | goto out_unlock; | |
acfdf5c3 | 3850 | } |
931ee56c | 3851 | hash_delegation_locked(dp, fp); |
0b26693c | 3852 | status = 0; |
417c6629 JL |
3853 | out_unlock: |
3854 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3855 | spin_unlock(&state_lock); |
0b26693c JL |
3856 | out: |
3857 | if (status) { | |
6011695d | 3858 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3859 | return ERR_PTR(status); |
3860 | } | |
3861 | return dp; | |
edab9782 BF |
3862 | } |
3863 | ||
4aa8913c BH |
3864 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3865 | { | |
3866 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3867 | if (status == -EAGAIN) | |
3868 | open->op_why_no_deleg = WND4_CONTENTION; | |
3869 | else { | |
3870 | open->op_why_no_deleg = WND4_RESOURCE; | |
3871 | switch (open->op_deleg_want) { | |
3872 | case NFS4_SHARE_WANT_READ_DELEG: | |
3873 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3874 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3875 | break; | |
3876 | case NFS4_SHARE_WANT_CANCEL: | |
3877 | open->op_why_no_deleg = WND4_CANCELLED; | |
3878 | break; | |
3879 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3880 | WARN_ON_ONCE(1); |
4aa8913c BH |
3881 | } |
3882 | } | |
3883 | } | |
3884 | ||
1da177e4 LT |
3885 | /* |
3886 | * Attempt to hand out a delegation. | |
99c41515 BF |
3887 | * |
3888 | * Note we don't support write delegations, and won't until the vfs has | |
3889 | * proper support for them. | |
1da177e4 LT |
3890 | */ |
3891 | static void | |
4cf59221 JL |
3892 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3893 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3894 | { |
3895 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3896 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3897 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3898 | int cb_up; |
99c41515 | 3899 | int status = 0; |
1da177e4 | 3900 | |
fe0750e5 | 3901 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3902 | open->op_recall = 0; |
3903 | switch (open->op_claim_type) { | |
3904 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3905 | if (!cb_up) |
7b190fec | 3906 | open->op_recall = 1; |
99c41515 BF |
3907 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3908 | goto out_no_deleg; | |
7b190fec N |
3909 | break; |
3910 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3911 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3912 | /* |
3913 | * Let's not give out any delegations till everyone's | |
3914 | * had the chance to reclaim theirs.... | |
3915 | */ | |
4cf59221 | 3916 | if (locks_in_grace(clp->net)) |
99c41515 | 3917 | goto out_no_deleg; |
dad1c067 | 3918 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3919 | goto out_no_deleg; |
9a0590ae SD |
3920 | /* |
3921 | * Also, if the file was opened for write or | |
3922 | * create, there's a good chance the client's | |
3923 | * about to write to it, resulting in an | |
3924 | * immediate recall (since we don't support | |
3925 | * write delegations): | |
3926 | */ | |
7b190fec | 3927 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3928 | goto out_no_deleg; |
3929 | if (open->op_create == NFS4_OPEN_CREATE) | |
3930 | goto out_no_deleg; | |
7b190fec N |
3931 | break; |
3932 | default: | |
99c41515 | 3933 | goto out_no_deleg; |
7b190fec | 3934 | } |
11b9164a | 3935 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3936 | if (IS_ERR(dp)) |
dd239cc0 | 3937 | goto out_no_deleg; |
1da177e4 | 3938 | |
d5477a8d | 3939 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3940 | |
8c10cbdb | 3941 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3942 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3943 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3944 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3945 | return; |
dd239cc0 | 3946 | out_no_deleg: |
99c41515 BF |
3947 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3948 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3949 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3950 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3951 | open->op_recall = 1; |
3952 | } | |
99c41515 BF |
3953 | |
3954 | /* 4.1 client asking for a delegation? */ | |
3955 | if (open->op_deleg_want) | |
3956 | nfsd4_open_deleg_none_ext(open, status); | |
3957 | return; | |
1da177e4 LT |
3958 | } |
3959 | ||
e27f49c3 BH |
3960 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3961 | struct nfs4_delegation *dp) | |
3962 | { | |
3963 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3964 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3965 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3966 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3967 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3968 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3969 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3970 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3971 | } | |
3972 | /* Otherwise the client must be confused wanting a delegation | |
3973 | * it already has, therefore we don't return | |
3974 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3975 | */ | |
3976 | } | |
3977 | ||
b37ad28b | 3978 | __be32 |
1da177e4 LT |
3979 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3980 | { | |
6668958f | 3981 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3982 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3983 | struct nfs4_file *fp = NULL; |
dcef0413 | 3984 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3985 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3986 | __be32 status; |
1da177e4 | 3987 | |
1da177e4 LT |
3988 | /* |
3989 | * Lookup file; if found, lookup stateid and check open request, | |
3990 | * and check for delegations in the process of being recalled. | |
3991 | * If not found, create the nfs4_file struct | |
3992 | */ | |
f9c00c3a | 3993 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3994 | if (fp != open->op_file) { |
41d22663 | 3995 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3996 | if (status) |
3997 | goto out; | |
a46cb7f2 | 3998 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3999 | } else { |
950e0118 | 4000 | open->op_file = NULL; |
c44c5eeb | 4001 | status = nfserr_bad_stateid; |
8b289b2c | 4002 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 4003 | goto out; |
3e772463 | 4004 | status = nfserr_jukebox; |
1da177e4 LT |
4005 | } |
4006 | ||
4007 | /* | |
4008 | * OPEN the file, or upgrade an existing OPEN. | |
4009 | * If truncate fails, the OPEN fails. | |
4010 | */ | |
4011 | if (stp) { | |
4012 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 4013 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
4014 | if (status) |
4015 | goto out; | |
4016 | } else { | |
4cdc951b BF |
4017 | stp = open->op_stp; |
4018 | open->op_stp = NULL; | |
996e0938 | 4019 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
4020 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
4021 | if (status) { | |
4022 | release_open_stateid(stp); | |
4023 | goto out; | |
4024 | } | |
1da177e4 | 4025 | } |
dcef0413 BF |
4026 | update_stateid(&stp->st_stid.sc_stateid); |
4027 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4028 | |
d24433cd | 4029 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
4030 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
4031 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4032 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
4033 | goto nodeleg; | |
4034 | } | |
4035 | } | |
4036 | ||
1da177e4 LT |
4037 | /* |
4038 | * Attempt to hand out a delegation. No error return, because the | |
4039 | * OPEN succeeds even if we fail. | |
4040 | */ | |
4cf59221 | 4041 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 4042 | nodeleg: |
1da177e4 LT |
4043 | status = nfs_ok; |
4044 | ||
8c10cbdb | 4045 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 4046 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 4047 | out: |
d24433cd BH |
4048 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
4049 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
4050 | open->op_deleg_want) |
4051 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 4052 | |
13cd2184 N |
4053 | if (fp) |
4054 | put_nfs4_file(fp); | |
37515177 | 4055 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 4056 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
4057 | /* |
4058 | * To finish the open response, we just need to set the rflags. | |
4059 | */ | |
4060 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 4061 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 4062 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 4063 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
4064 | if (dp) |
4065 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
4066 | if (stp) |
4067 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
4068 | |
4069 | return status; | |
4070 | } | |
4071 | ||
58fb12e6 JL |
4072 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
4073 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
4074 | { |
4075 | if (open->op_openowner) { | |
d3134b10 JL |
4076 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
4077 | ||
4078 | nfsd4_cstate_assign_replay(cstate, so); | |
4079 | nfs4_put_stateowner(so); | |
d29b20cd | 4080 | } |
32513b40 BF |
4081 | if (open->op_file) |
4082 | nfsd4_free_file(open->op_file); | |
4cdc951b | 4083 | if (open->op_stp) |
6011695d | 4084 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
4085 | } |
4086 | ||
b37ad28b | 4087 | __be32 |
b591480b BF |
4088 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4089 | clientid_t *clid) | |
1da177e4 LT |
4090 | { |
4091 | struct nfs4_client *clp; | |
b37ad28b | 4092 | __be32 status; |
7f2210fa | 4093 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4094 | |
1da177e4 LT |
4095 | dprintk("process_renew(%08x/%08x): starting\n", |
4096 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 4097 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 4098 | if (status) |
1da177e4 | 4099 | goto out; |
4b24ca7d | 4100 | clp = cstate->clp; |
1da177e4 | 4101 | status = nfserr_cb_path_down; |
ea1da636 | 4102 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 4103 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
4104 | goto out; |
4105 | status = nfs_ok; | |
4106 | out: | |
1da177e4 LT |
4107 | return status; |
4108 | } | |
4109 | ||
a76b4319 | 4110 | static void |
12760c66 | 4111 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 4112 | { |
33dcc481 | 4113 | /* do nothing if grace period already ended */ |
a51c84ed | 4114 | if (nn->grace_ended) |
33dcc481 JL |
4115 | return; |
4116 | ||
a76b4319 | 4117 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 4118 | nn->grace_ended = true; |
12760c66 | 4119 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 4120 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
4121 | /* |
4122 | * Now that every NFSv4 client has had the chance to recover and | |
4123 | * to see the (possibly new, possibly shorter) lease time, we | |
4124 | * can safely set the next grace time to the current lease time: | |
4125 | */ | |
5284b44e | 4126 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
4127 | } |
4128 | ||
fd39ca9a | 4129 | static time_t |
09121281 | 4130 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
4131 | { |
4132 | struct nfs4_client *clp; | |
fe0750e5 | 4133 | struct nfs4_openowner *oo; |
1da177e4 | 4134 | struct nfs4_delegation *dp; |
217526e7 | 4135 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4136 | struct list_head *pos, *next, reaplist; |
3d733711 | 4137 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 4138 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 | 4139 | |
1da177e4 | 4140 | dprintk("NFSD: laundromat service - starting\n"); |
12760c66 | 4141 | nfsd4_end_grace(nn); |
36acb66b | 4142 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 4143 | spin_lock(&nn->client_lock); |
5ed58bb2 | 4144 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
4145 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
4146 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
4147 | t = clp->cl_time - cutoff; | |
a832e7ae | 4148 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
4149 | break; |
4150 | } | |
221a6876 | 4151 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
4152 | dprintk("NFSD: client in use (clientid %08x)\n", |
4153 | clp->cl_clientid.cl_id); | |
4154 | continue; | |
4155 | } | |
4864af97 | 4156 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 4157 | } |
c9a49628 | 4158 | spin_unlock(&nn->client_lock); |
36acb66b BH |
4159 | list_for_each_safe(pos, next, &reaplist) { |
4160 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
4161 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
4162 | clp->cl_clientid.cl_id); | |
4864af97 | 4163 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
4164 | expire_client(clp); |
4165 | } | |
cdc97505 | 4166 | spin_lock(&state_lock); |
e8c69d17 | 4167 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 4168 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
4169 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
4170 | continue; | |
1da177e4 | 4171 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
4172 | t = dp->dl_time - cutoff; |
4173 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4174 | break; |
4175 | } | |
42690676 JL |
4176 | unhash_delegation_locked(dp); |
4177 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 4178 | } |
cdc97505 | 4179 | spin_unlock(&state_lock); |
2d4a532d JL |
4180 | while (!list_empty(&reaplist)) { |
4181 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4182 | dl_recall_lru); | |
4183 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4184 | revoke_delegation(dp); |
1da177e4 | 4185 | } |
217526e7 JL |
4186 | |
4187 | spin_lock(&nn->client_lock); | |
4188 | while (!list_empty(&nn->close_lru)) { | |
4189 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
4190 | oo_close_lru); | |
4191 | if (time_after((unsigned long)oo->oo_time, | |
4192 | (unsigned long)cutoff)) { | |
a832e7ae JL |
4193 | t = oo->oo_time - cutoff; |
4194 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4195 | break; |
4196 | } | |
217526e7 JL |
4197 | list_del_init(&oo->oo_close_lru); |
4198 | stp = oo->oo_last_closed_stid; | |
4199 | oo->oo_last_closed_stid = NULL; | |
4200 | spin_unlock(&nn->client_lock); | |
4201 | nfs4_put_stid(&stp->st_stid); | |
4202 | spin_lock(&nn->client_lock); | |
1da177e4 | 4203 | } |
217526e7 JL |
4204 | spin_unlock(&nn->client_lock); |
4205 | ||
a832e7ae | 4206 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 4207 | return new_timeo; |
1da177e4 LT |
4208 | } |
4209 | ||
a254b246 HH |
4210 | static struct workqueue_struct *laundry_wq; |
4211 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4212 | |
4213 | static void | |
09121281 | 4214 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4215 | { |
4216 | time_t t; | |
09121281 SK |
4217 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4218 | work); | |
4219 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4220 | laundromat_work); | |
1da177e4 | 4221 | |
09121281 | 4222 | t = nfs4_laundromat(nn); |
1da177e4 | 4223 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4224 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4225 | } |
4226 | ||
f7a4d872 | 4227 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4228 | { |
11b9164a | 4229 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4230 | return nfserr_bad_stateid; |
4231 | return nfs_ok; | |
1da177e4 LT |
4232 | } |
4233 | ||
1da177e4 | 4234 | static inline int |
82c5ff1b | 4235 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4236 | { |
82c5ff1b JL |
4237 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4238 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4239 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4240 | } |
4241 | ||
4242 | static inline int | |
82c5ff1b | 4243 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4244 | { |
82c5ff1b JL |
4245 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4246 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4247 | } |
4248 | ||
4249 | static | |
dcef0413 | 4250 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4251 | { |
b37ad28b | 4252 | __be32 status = nfserr_openmode; |
1da177e4 | 4253 | |
02921914 BF |
4254 | /* For lock stateid's, we test the parent open, not the lock: */ |
4255 | if (stp->st_openstp) | |
4256 | stp = stp->st_openstp; | |
82c5ff1b | 4257 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4258 | goto out; |
82c5ff1b | 4259 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4260 | goto out; |
4261 | status = nfs_ok; | |
4262 | out: | |
4263 | return status; | |
4264 | } | |
4265 | ||
b37ad28b | 4266 | static inline __be32 |
5ccb0066 | 4267 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4268 | { |
203a8c8e | 4269 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4270 | return nfs_ok; |
5ccb0066 | 4271 | else if (locks_in_grace(net)) { |
25985edc | 4272 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4273 | * conflicting state; so we must wait out the grace period. */ |
4274 | return nfserr_grace; | |
4275 | } else if (flags & WR_STATE) | |
4276 | return nfs4_share_conflict(current_fh, | |
4277 | NFS4_SHARE_DENY_WRITE); | |
4278 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4279 | return nfs4_share_conflict(current_fh, | |
4280 | NFS4_SHARE_DENY_READ); | |
4281 | } | |
4282 | ||
4283 | /* | |
4284 | * Allow READ/WRITE during grace period on recovered state only for files | |
4285 | * that are not able to provide mandatory locking. | |
4286 | */ | |
4287 | static inline int | |
5ccb0066 | 4288 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4289 | { |
5ccb0066 | 4290 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4291 | } |
4292 | ||
81b82965 BF |
4293 | /* Returns true iff a is later than b: */ |
4294 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4295 | { | |
1a9357f4 | 4296 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4297 | } |
4298 | ||
57b7b43b | 4299 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4300 | { |
6668958f AA |
4301 | /* |
4302 | * When sessions are used the stateid generation number is ignored | |
4303 | * when it is zero. | |
4304 | */ | |
28dde241 | 4305 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4306 | return nfs_ok; |
4307 | ||
4308 | if (in->si_generation == ref->si_generation) | |
4309 | return nfs_ok; | |
6668958f | 4310 | |
0836f587 | 4311 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4312 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4313 | return nfserr_bad_stateid; |
4314 | /* | |
81b82965 BF |
4315 | * However, we could see a stateid from the past, even from a |
4316 | * non-buggy client. For example, if the client sends a lock | |
4317 | * while some IO is outstanding, the lock may bump si_generation | |
4318 | * while the IO is still in flight. The client could avoid that | |
4319 | * situation by waiting for responses on all the IO requests, | |
4320 | * but better performance may result in retrying IO that | |
4321 | * receives an old_stateid error if requests are rarely | |
4322 | * reordered in flight: | |
0836f587 | 4323 | */ |
81b82965 | 4324 | return nfserr_old_stateid; |
0836f587 BF |
4325 | } |
4326 | ||
7df302f7 | 4327 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4328 | { |
97b7e3b6 BF |
4329 | struct nfs4_stid *s; |
4330 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4331 | __be32 status = nfserr_bad_stateid; |
17456804 | 4332 | |
7df302f7 | 4333 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4334 | return status; |
7df302f7 CL |
4335 | /* Client debugging aid. */ |
4336 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4337 | char addr_str[INET6_ADDRSTRLEN]; | |
4338 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4339 | sizeof(addr_str)); | |
4340 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4341 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4342 | return status; |
7df302f7 | 4343 | } |
1af71cc8 JL |
4344 | spin_lock(&cl->cl_lock); |
4345 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4346 | if (!s) |
1af71cc8 | 4347 | goto out_unlock; |
36279ac1 | 4348 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4349 | if (status) |
1af71cc8 | 4350 | goto out_unlock; |
23340032 BF |
4351 | switch (s->sc_type) { |
4352 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4353 | status = nfs_ok; |
4354 | break; | |
3bd64a5b | 4355 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4356 | status = nfserr_deleg_revoked; |
4357 | break; | |
23340032 BF |
4358 | case NFS4_OPEN_STID: |
4359 | case NFS4_LOCK_STID: | |
4360 | ols = openlockstateid(s); | |
4361 | if (ols->st_stateowner->so_is_open_owner | |
4362 | && !(openowner(ols->st_stateowner)->oo_flags | |
4363 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4364 | status = nfserr_bad_stateid; |
4365 | else | |
4366 | status = nfs_ok; | |
4367 | break; | |
23340032 BF |
4368 | default: |
4369 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4370 | /* Fallthrough */ |
23340032 | 4371 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4372 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4373 | status = nfserr_bad_stateid; |
23340032 | 4374 | } |
1af71cc8 JL |
4375 | out_unlock: |
4376 | spin_unlock(&cl->cl_lock); | |
4377 | return status; | |
17456804 BS |
4378 | } |
4379 | ||
2dd6e458 TM |
4380 | static __be32 |
4381 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4382 | stateid_t *stateid, unsigned char typemask, | |
4383 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4384 | { |
0eb6f20a | 4385 | __be32 status; |
38c2f4b1 BF |
4386 | |
4387 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4388 | return nfserr_bad_stateid; | |
4b24ca7d | 4389 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4390 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4391 | if (cstate->session) |
a8a7c677 | 4392 | return nfserr_bad_stateid; |
38c2f4b1 | 4393 | return nfserr_stale_stateid; |
a8a7c677 | 4394 | } |
0eb6f20a BF |
4395 | if (status) |
4396 | return status; | |
4b24ca7d | 4397 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4398 | if (!*s) |
4399 | return nfserr_bad_stateid; | |
4400 | return nfs_ok; | |
38c2f4b1 BF |
4401 | } |
4402 | ||
1da177e4 LT |
4403 | /* |
4404 | * Checks for stateid operations | |
4405 | */ | |
b37ad28b | 4406 | __be32 |
5ccb0066 | 4407 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4408 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4409 | { |
69064a27 | 4410 | struct nfs4_stid *s; |
dcef0413 | 4411 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4412 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4413 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4414 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4415 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4416 | struct file *file = NULL; |
b37ad28b | 4417 | __be32 status; |
1da177e4 | 4418 | |
1da177e4 LT |
4419 | if (filpp) |
4420 | *filpp = NULL; | |
4421 | ||
5ccb0066 | 4422 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4423 | return nfserr_grace; |
4424 | ||
4425 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4426 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4427 | |
2dd6e458 | 4428 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4429 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4430 | &s, nn); |
38c2f4b1 | 4431 | if (status) |
c2d1d6a8 | 4432 | return status; |
69064a27 BF |
4433 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4434 | if (status) | |
4435 | goto out; | |
f7a4d872 BF |
4436 | switch (s->sc_type) { |
4437 | case NFS4_DELEG_STID: | |
69064a27 | 4438 | dp = delegstateid(s); |
dc9bf700 BF |
4439 | status = nfs4_check_delegmode(dp, flags); |
4440 | if (status) | |
4441 | goto out; | |
43b0178e | 4442 | if (filpp) { |
11b9164a | 4443 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4444 | if (!file) { |
063b0fb9 BF |
4445 | WARN_ON_ONCE(1); |
4446 | status = nfserr_serverfault; | |
4447 | goto out; | |
4448 | } | |
de18643d | 4449 | get_file(file); |
43b0178e | 4450 | } |
f7a4d872 BF |
4451 | break; |
4452 | case NFS4_OPEN_STID: | |
4453 | case NFS4_LOCK_STID: | |
69064a27 | 4454 | stp = openlockstateid(s); |
f7a4d872 BF |
4455 | status = nfs4_check_fh(current_fh, stp); |
4456 | if (status) | |
1da177e4 | 4457 | goto out; |
fe0750e5 | 4458 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4459 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4460 | goto out; |
a4455be0 BF |
4461 | status = nfs4_check_openmode(stp, flags); |
4462 | if (status) | |
1da177e4 | 4463 | goto out; |
f9d7562f | 4464 | if (filpp) { |
11b9164a TM |
4465 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4466 | ||
f9d7562f | 4467 | if (flags & RD_STATE) |
11b9164a | 4468 | file = find_readable_file(fp); |
f9d7562f | 4469 | else |
11b9164a | 4470 | file = find_writeable_file(fp); |
f9d7562f | 4471 | } |
f7a4d872 BF |
4472 | break; |
4473 | default: | |
14bcab1a TM |
4474 | status = nfserr_bad_stateid; |
4475 | goto out; | |
1da177e4 LT |
4476 | } |
4477 | status = nfs_ok; | |
14bcab1a | 4478 | if (file) |
de18643d | 4479 | *filpp = file; |
1da177e4 | 4480 | out: |
fd911011 | 4481 | nfs4_put_stid(s); |
1da177e4 LT |
4482 | return status; |
4483 | } | |
4484 | ||
17456804 BS |
4485 | /* |
4486 | * Test if the stateid is valid | |
4487 | */ | |
4488 | __be32 | |
4489 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4490 | struct nfsd4_test_stateid *test_stateid) | |
4491 | { | |
03cfb420 BS |
4492 | struct nfsd4_test_stateid_id *stateid; |
4493 | struct nfs4_client *cl = cstate->session->se_client; | |
4494 | ||
03cfb420 | 4495 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
4496 | stateid->ts_id_status = |
4497 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 4498 | |
17456804 BS |
4499 | return nfs_ok; |
4500 | } | |
4501 | ||
e1ca12df BS |
4502 | __be32 |
4503 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4504 | struct nfsd4_free_stateid *free_stateid) | |
4505 | { | |
4506 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4507 | struct nfs4_stid *s; |
3bd64a5b | 4508 | struct nfs4_delegation *dp; |
fc5a96c3 | 4509 | struct nfs4_ol_stateid *stp; |
38c2f4b1 | 4510 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4511 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 4512 | |
1af71cc8 JL |
4513 | spin_lock(&cl->cl_lock); |
4514 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4515 | if (!s) |
1af71cc8 | 4516 | goto out_unlock; |
2da1cec7 BF |
4517 | switch (s->sc_type) { |
4518 | case NFS4_DELEG_STID: | |
e1ca12df | 4519 | ret = nfserr_locks_held; |
1af71cc8 | 4520 | break; |
2da1cec7 | 4521 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4522 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4523 | if (ret) | |
1af71cc8 JL |
4524 | break; |
4525 | ret = nfserr_locks_held; | |
f7a4d872 | 4526 | break; |
1af71cc8 JL |
4527 | case NFS4_LOCK_STID: |
4528 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4529 | if (ret) | |
4530 | break; | |
fc5a96c3 JL |
4531 | stp = openlockstateid(s); |
4532 | ret = nfserr_locks_held; | |
4533 | if (check_for_locks(stp->st_stid.sc_file, | |
4534 | lockowner(stp->st_stateowner))) | |
4535 | break; | |
4536 | unhash_lock_stateid(stp); | |
1af71cc8 | 4537 | spin_unlock(&cl->cl_lock); |
fc5a96c3 JL |
4538 | nfs4_put_stid(s); |
4539 | ret = nfs_ok; | |
1af71cc8 | 4540 | goto out; |
3bd64a5b BF |
4541 | case NFS4_REVOKED_DELEG_STID: |
4542 | dp = delegstateid(s); | |
2d4a532d JL |
4543 | list_del_init(&dp->dl_recall_lru); |
4544 | spin_unlock(&cl->cl_lock); | |
6011695d | 4545 | nfs4_put_stid(s); |
3bd64a5b | 4546 | ret = nfs_ok; |
1af71cc8 JL |
4547 | goto out; |
4548 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4549 | } |
1af71cc8 JL |
4550 | out_unlock: |
4551 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 4552 | out: |
e1ca12df BS |
4553 | return ret; |
4554 | } | |
4555 | ||
4c4cd222 N |
4556 | static inline int |
4557 | setlkflg (int type) | |
4558 | { | |
4559 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4560 | RD_STATE : WR_STATE; | |
4561 | } | |
1da177e4 | 4562 | |
dcef0413 | 4563 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4564 | { |
4565 | struct svc_fh *current_fh = &cstate->current_fh; | |
4566 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4567 | __be32 status; | |
4568 | ||
c0a5d93e BF |
4569 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4570 | if (status) | |
4571 | return status; | |
3bd64a5b BF |
4572 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4573 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4574 | /* |
4575 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4576 | * nfserr_replay_me from the previous step, and |
4577 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4578 | */ |
4579 | return nfserr_bad_stateid; | |
4580 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4581 | if (status) | |
4582 | return status; | |
4583 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4584 | } |
4585 | ||
1da177e4 LT |
4586 | /* |
4587 | * Checks for sequence id mutating operations. | |
4588 | */ | |
b37ad28b | 4589 | static __be32 |
dd453dfd | 4590 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4591 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4592 | struct nfs4_ol_stateid **stpp, |
4593 | struct nfsd_net *nn) | |
1da177e4 | 4594 | { |
0836f587 | 4595 | __be32 status; |
38c2f4b1 | 4596 | struct nfs4_stid *s; |
e17f99b7 | 4597 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4598 | |
8c10cbdb BH |
4599 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4600 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4601 | |
1da177e4 | 4602 | *stpp = NULL; |
2dd6e458 | 4603 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4604 | if (status) |
4605 | return status; | |
e17f99b7 | 4606 | stp = openlockstateid(s); |
58fb12e6 | 4607 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4608 | |
e17f99b7 | 4609 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4610 | if (!status) |
e17f99b7 | 4611 | *stpp = stp; |
fd911011 TM |
4612 | else |
4613 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4614 | return status; |
c0a5d93e | 4615 | } |
39325bd0 | 4616 | |
3320fef1 SK |
4617 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4618 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4619 | { |
4620 | __be32 status; | |
4621 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4622 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4623 | |
c0a5d93e | 4624 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4625 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4626 | if (status) |
4627 | return status; | |
4cbfc9f7 TM |
4628 | oo = openowner(stp->st_stateowner); |
4629 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4630 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4631 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4632 | } |
4633 | *stpp = stp; | |
3a4f98bb | 4634 | return nfs_ok; |
1da177e4 LT |
4635 | } |
4636 | ||
b37ad28b | 4637 | __be32 |
ca364317 | 4638 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4639 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4640 | { |
b37ad28b | 4641 | __be32 status; |
fe0750e5 | 4642 | struct nfs4_openowner *oo; |
dcef0413 | 4643 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4644 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4645 | |
a6a9f18f AV |
4646 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4647 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4648 | |
ca364317 | 4649 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4650 | if (status) |
4651 | return status; | |
1da177e4 | 4652 | |
9072d5c6 | 4653 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4654 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4655 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4656 | if (status) |
68b66e82 | 4657 | goto out; |
fe0750e5 | 4658 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4659 | status = nfserr_bad_stateid; |
dad1c067 | 4660 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4661 | goto put_stateid; |
dad1c067 | 4662 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4663 | update_stateid(&stp->st_stid.sc_stateid); |
4664 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4665 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4666 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4667 | |
2a4317c5 | 4668 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4669 | status = nfs_ok; |
2585fc79 TM |
4670 | put_stateid: |
4671 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4672 | out: |
9411b1d4 | 4673 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4674 | return status; |
4675 | } | |
4676 | ||
6409a5a6 | 4677 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4678 | { |
82c5ff1b | 4679 | if (!test_access(access, stp)) |
6409a5a6 | 4680 | return; |
11b9164a | 4681 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4682 | clear_access(access, stp); |
6409a5a6 | 4683 | } |
f197c271 | 4684 | |
6409a5a6 BF |
4685 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4686 | { | |
4687 | switch (to_access) { | |
4688 | case NFS4_SHARE_ACCESS_READ: | |
4689 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4690 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4691 | break; | |
4692 | case NFS4_SHARE_ACCESS_WRITE: | |
4693 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4694 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4695 | break; | |
4696 | case NFS4_SHARE_ACCESS_BOTH: | |
4697 | break; | |
4698 | default: | |
063b0fb9 | 4699 | WARN_ON_ONCE(1); |
1da177e4 LT |
4700 | } |
4701 | } | |
4702 | ||
b37ad28b | 4703 | __be32 |
ca364317 BF |
4704 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4705 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4706 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4707 | { |
b37ad28b | 4708 | __be32 status; |
dcef0413 | 4709 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4710 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4711 | |
a6a9f18f AV |
4712 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4713 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4714 | |
c30e92df | 4715 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4716 | if (od->od_deleg_want) |
4717 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4718 | od->od_deleg_want); | |
1da177e4 | 4719 | |
c0a5d93e | 4720 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4721 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4722 | if (status) |
1da177e4 | 4723 | goto out; |
1da177e4 | 4724 | status = nfserr_inval; |
82c5ff1b | 4725 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4726 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4727 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4728 | goto put_stateid; |
1da177e4 | 4729 | } |
ce0fc43c | 4730 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4731 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4732 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4733 | goto put_stateid; |
1da177e4 | 4734 | } |
6409a5a6 | 4735 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4736 | |
ce0fc43c | 4737 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4738 | |
dcef0413 BF |
4739 | update_stateid(&stp->st_stid.sc_stateid); |
4740 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4741 | status = nfs_ok; |
0667b1e9 TM |
4742 | put_stateid: |
4743 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4744 | out: |
9411b1d4 | 4745 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
4746 | return status; |
4747 | } | |
4748 | ||
f7a4d872 BF |
4749 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4750 | { | |
acf9295b | 4751 | struct nfs4_client *clp = s->st_stid.sc_client; |
d83017f9 | 4752 | LIST_HEAD(reaplist); |
acf9295b | 4753 | |
f7a4d872 | 4754 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
2c41beb0 | 4755 | spin_lock(&clp->cl_lock); |
d83017f9 | 4756 | unhash_open_stateid(s, &reaplist); |
acf9295b | 4757 | |
d83017f9 JL |
4758 | if (clp->cl_minorversion) { |
4759 | put_ol_stateid_locked(s, &reaplist); | |
4760 | spin_unlock(&clp->cl_lock); | |
4761 | free_ol_stateid_reaplist(&reaplist); | |
4762 | } else { | |
4763 | spin_unlock(&clp->cl_lock); | |
4764 | free_ol_stateid_reaplist(&reaplist); | |
d3134b10 | 4765 | move_to_close_lru(s, clp->net); |
d83017f9 | 4766 | } |
38c387b5 BF |
4767 | } |
4768 | ||
1da177e4 LT |
4769 | /* |
4770 | * nfs4_unlock_state() called after encode | |
4771 | */ | |
b37ad28b | 4772 | __be32 |
ca364317 | 4773 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4774 | struct nfsd4_close *close) |
1da177e4 | 4775 | { |
b37ad28b | 4776 | __be32 status; |
dcef0413 | 4777 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4778 | struct net *net = SVC_NET(rqstp); |
4779 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4780 | |
a6a9f18f AV |
4781 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4782 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4783 | |
f7a4d872 BF |
4784 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4785 | &close->cl_stateid, | |
4786 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4787 | &stp, nn); |
9411b1d4 | 4788 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4789 | if (status) |
1da177e4 | 4790 | goto out; |
dcef0413 BF |
4791 | update_stateid(&stp->st_stid.sc_stateid); |
4792 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4793 | |
f7a4d872 | 4794 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4795 | |
4796 | /* put reference from nfs4_preprocess_seqid_op */ | |
4797 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4798 | out: |
1da177e4 LT |
4799 | return status; |
4800 | } | |
4801 | ||
b37ad28b | 4802 | __be32 |
ca364317 BF |
4803 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4804 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4805 | { |
203a8c8e BF |
4806 | struct nfs4_delegation *dp; |
4807 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4808 | struct nfs4_stid *s; |
b37ad28b | 4809 | __be32 status; |
3320fef1 | 4810 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4811 | |
ca364317 | 4812 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4813 | return status; |
1da177e4 | 4814 | |
2dd6e458 | 4815 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4816 | if (status) |
203a8c8e | 4817 | goto out; |
38c2f4b1 | 4818 | dp = delegstateid(s); |
d5477a8d | 4819 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4820 | if (status) |
fd911011 | 4821 | goto put_stateid; |
203a8c8e | 4822 | |
3bd64a5b | 4823 | destroy_delegation(dp); |
fd911011 TM |
4824 | put_stateid: |
4825 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
4826 | out: |
4827 | return status; | |
4828 | } | |
4829 | ||
4830 | ||
1da177e4 | 4831 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4832 | |
87df4de8 BH |
4833 | static inline u64 |
4834 | end_offset(u64 start, u64 len) | |
4835 | { | |
4836 | u64 end; | |
4837 | ||
4838 | end = start + len; | |
4839 | return end >= start ? end: NFS4_MAX_UINT64; | |
4840 | } | |
4841 | ||
4842 | /* last octet in a range */ | |
4843 | static inline u64 | |
4844 | last_byte_offset(u64 start, u64 len) | |
4845 | { | |
4846 | u64 end; | |
4847 | ||
063b0fb9 | 4848 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4849 | end = start + len; |
4850 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4851 | } | |
4852 | ||
1da177e4 LT |
4853 | /* |
4854 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4855 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4856 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4857 | * locking, this prevents us from being completely protocol-compliant. The | |
4858 | * real solution to this problem is to start using unsigned file offsets in | |
4859 | * the VFS, but this is a very deep change! | |
4860 | */ | |
4861 | static inline void | |
4862 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4863 | { | |
4864 | if (lock->fl_start < 0) | |
4865 | lock->fl_start = OFFSET_MAX; | |
4866 | if (lock->fl_end < 0) | |
4867 | lock->fl_end = OFFSET_MAX; | |
4868 | } | |
4869 | ||
d5b9026a N |
4870 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4871 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4872 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4873 | }; |
1da177e4 LT |
4874 | |
4875 | static inline void | |
4876 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4877 | { | |
fe0750e5 | 4878 | struct nfs4_lockowner *lo; |
1da177e4 | 4879 | |
d5b9026a | 4880 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4881 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4882 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4883 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4884 | if (!deny->ld_owner.data) |
4885 | /* We just don't care that much */ | |
4886 | goto nevermind; | |
fe0750e5 BF |
4887 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4888 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4889 | } else { |
7c13f344 BF |
4890 | nevermind: |
4891 | deny->ld_owner.len = 0; | |
4892 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4893 | deny->ld_clientid.cl_boot = 0; |
4894 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4895 | } |
4896 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4897 | deny->ld_length = NFS4_MAX_UINT64; |
4898 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4899 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4900 | deny->ld_type = NFS4_READ_LT; | |
4901 | if (fl->fl_type != F_RDLCK) | |
4902 | deny->ld_type = NFS4_WRITE_LT; | |
4903 | } | |
4904 | ||
fe0750e5 | 4905 | static struct nfs4_lockowner * |
c58c6610 | 4906 | find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, |
d4f0489f | 4907 | struct nfs4_client *clp) |
1da177e4 | 4908 | { |
d4f0489f | 4909 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 4910 | struct nfs4_stateowner *so; |
1da177e4 | 4911 | |
0a880a28 TM |
4912 | lockdep_assert_held(&clp->cl_lock); |
4913 | ||
d4f0489f TM |
4914 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
4915 | so_strhash) { | |
b3c32bcd TM |
4916 | if (so->so_is_open_owner) |
4917 | continue; | |
d4f0489f | 4918 | if (!same_owner_str(so, owner)) |
b3c32bcd | 4919 | continue; |
5db1c03f | 4920 | atomic_inc(&so->so_count); |
b3c32bcd | 4921 | return lockowner(so); |
1da177e4 LT |
4922 | } |
4923 | return NULL; | |
4924 | } | |
4925 | ||
c58c6610 TM |
4926 | static struct nfs4_lockowner * |
4927 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, | |
d4f0489f | 4928 | struct nfs4_client *clp) |
c58c6610 TM |
4929 | { |
4930 | struct nfs4_lockowner *lo; | |
4931 | ||
d4f0489f TM |
4932 | spin_lock(&clp->cl_lock); |
4933 | lo = find_lockowner_str_locked(clid, owner, clp); | |
4934 | spin_unlock(&clp->cl_lock); | |
c58c6610 TM |
4935 | return lo; |
4936 | } | |
4937 | ||
8f4b54c5 JL |
4938 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
4939 | { | |
c58c6610 | 4940 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
4941 | } |
4942 | ||
6b180f0b JL |
4943 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4944 | { | |
4945 | struct nfs4_lockowner *lo = lockowner(sop); | |
4946 | ||
4947 | kmem_cache_free(lockowner_slab, lo); | |
4948 | } | |
4949 | ||
4950 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
4951 | .so_unhash = nfs4_unhash_lockowner, |
4952 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
4953 | }; |
4954 | ||
1da177e4 LT |
4955 | /* |
4956 | * Alloc a lock owner structure. | |
4957 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4958 | * occurred. |
1da177e4 | 4959 | * |
16bfdaaf | 4960 | * strhashval = ownerstr_hashval |
1da177e4 | 4961 | */ |
fe0750e5 | 4962 | static struct nfs4_lockowner * |
c58c6610 TM |
4963 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
4964 | struct nfs4_ol_stateid *open_stp, | |
4965 | struct nfsd4_lock *lock) | |
4966 | { | |
c58c6610 | 4967 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 4968 | |
fe0750e5 BF |
4969 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4970 | if (!lo) | |
1da177e4 | 4971 | return NULL; |
fe0750e5 BF |
4972 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4973 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 4974 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 4975 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 4976 | spin_lock(&clp->cl_lock); |
c58c6610 | 4977 | ret = find_lockowner_str_locked(&clp->cl_clientid, |
d4f0489f | 4978 | &lock->lk_new_owner, clp); |
c58c6610 TM |
4979 | if (ret == NULL) { |
4980 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 4981 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
4982 | ret = lo; |
4983 | } else | |
4984 | nfs4_free_lockowner(&lo->lo_owner); | |
d4f0489f | 4985 | spin_unlock(&clp->cl_lock); |
fe0750e5 | 4986 | return lo; |
1da177e4 LT |
4987 | } |
4988 | ||
356a95ec JL |
4989 | static void |
4990 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4991 | struct nfs4_file *fp, struct inode *inode, | |
4992 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4993 | { |
d3b313a4 | 4994 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4995 | |
356a95ec JL |
4996 | lockdep_assert_held(&clp->cl_lock); |
4997 | ||
3d0fabd5 | 4998 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4999 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 5000 | stp->st_stateowner = &lo->lo_owner; |
e4f1dd7f | 5001 | atomic_inc(&lo->lo_owner.so_count); |
13cd2184 | 5002 | get_nfs4_file(fp); |
11b9164a | 5003 | stp->st_stid.sc_file = fp; |
b49e084d | 5004 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 5005 | stp->st_access_bmap = 0; |
1da177e4 | 5006 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 5007 | stp->st_openstp = open_stp; |
3c87b9b7 | 5008 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 5009 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
5010 | spin_lock(&fp->fi_lock); |
5011 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
5012 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
5013 | } |
5014 | ||
c53530da JL |
5015 | static struct nfs4_ol_stateid * |
5016 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
5017 | { | |
5018 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
5019 | struct nfs4_client *clp = lo->lo_owner.so_client; |
5020 | ||
5021 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
5022 | |
5023 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
5024 | if (lst->st_stid.sc_file == fp) { |
5025 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 5026 | return lst; |
3d0fabd5 | 5027 | } |
c53530da JL |
5028 | } |
5029 | return NULL; | |
5030 | } | |
5031 | ||
356a95ec JL |
5032 | static struct nfs4_ol_stateid * |
5033 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
5034 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
5035 | bool *new) | |
5036 | { | |
5037 | struct nfs4_stid *ns = NULL; | |
5038 | struct nfs4_ol_stateid *lst; | |
5039 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
5040 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
5041 | ||
5042 | spin_lock(&clp->cl_lock); | |
5043 | lst = find_lock_stateid(lo, fi); | |
5044 | if (lst == NULL) { | |
5045 | spin_unlock(&clp->cl_lock); | |
5046 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
5047 | if (ns == NULL) | |
5048 | return NULL; | |
5049 | ||
5050 | spin_lock(&clp->cl_lock); | |
5051 | lst = find_lock_stateid(lo, fi); | |
5052 | if (likely(!lst)) { | |
5053 | lst = openlockstateid(ns); | |
5054 | init_lock_stateid(lst, lo, fi, inode, ost); | |
5055 | ns = NULL; | |
5056 | *new = true; | |
5057 | } | |
5058 | } | |
5059 | spin_unlock(&clp->cl_lock); | |
5060 | if (ns) | |
5061 | nfs4_put_stid(ns); | |
5062 | return lst; | |
5063 | } | |
c53530da | 5064 | |
fd39ca9a | 5065 | static int |
1da177e4 LT |
5066 | check_lock_length(u64 offset, u64 length) |
5067 | { | |
87df4de8 | 5068 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
5069 | LOFF_OVERFLOW(offset, length))); |
5070 | } | |
5071 | ||
dcef0413 | 5072 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 5073 | { |
11b9164a | 5074 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 5075 | |
7214e860 JL |
5076 | lockdep_assert_held(&fp->fi_lock); |
5077 | ||
82c5ff1b | 5078 | if (test_access(access, lock_stp)) |
0997b173 | 5079 | return; |
12659651 | 5080 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 5081 | set_access(access, lock_stp); |
0997b173 BF |
5082 | } |
5083 | ||
356a95ec JL |
5084 | static __be32 |
5085 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
5086 | struct nfs4_ol_stateid *ost, | |
5087 | struct nfsd4_lock *lock, | |
5088 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 5089 | { |
5db1c03f | 5090 | __be32 status; |
11b9164a | 5091 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
5092 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
5093 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 5094 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
5095 | struct nfs4_lockowner *lo; |
5096 | unsigned int strhashval; | |
5097 | ||
d4f0489f | 5098 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); |
c53530da | 5099 | if (!lo) { |
d4f0489f | 5100 | strhashval = ownerstr_hashval(&lock->v.new.owner); |
c53530da JL |
5101 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
5102 | if (lo == NULL) | |
5103 | return nfserr_jukebox; | |
5104 | } else { | |
5105 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 5106 | status = nfserr_bad_seqid; |
c53530da JL |
5107 | if (!cstate->minorversion && |
5108 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 5109 | goto out; |
64a284d0 | 5110 | } |
c53530da | 5111 | |
356a95ec | 5112 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 5113 | if (*lst == NULL) { |
5db1c03f JL |
5114 | status = nfserr_jukebox; |
5115 | goto out; | |
64a284d0 | 5116 | } |
5db1c03f JL |
5117 | status = nfs_ok; |
5118 | out: | |
5119 | nfs4_put_stateowner(&lo->lo_owner); | |
5120 | return status; | |
64a284d0 BF |
5121 | } |
5122 | ||
1da177e4 LT |
5123 | /* |
5124 | * LOCK operation | |
5125 | */ | |
b37ad28b | 5126 | __be32 |
ca364317 | 5127 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5128 | struct nfsd4_lock *lock) |
1da177e4 | 5129 | { |
fe0750e5 BF |
5130 | struct nfs4_openowner *open_sop = NULL; |
5131 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 5132 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 5133 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 5134 | struct nfs4_file *fp; |
7d947842 | 5135 | struct file *filp = NULL; |
21179d81 JL |
5136 | struct file_lock *file_lock = NULL; |
5137 | struct file_lock *conflock = NULL; | |
b37ad28b | 5138 | __be32 status = 0; |
b34f27aa | 5139 | int lkflg; |
b8dd7b9a | 5140 | int err; |
5db1c03f | 5141 | bool new = false; |
3320fef1 SK |
5142 | struct net *net = SVC_NET(rqstp); |
5143 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
5144 | |
5145 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
5146 | (long long) lock->lk_offset, | |
5147 | (long long) lock->lk_length); | |
5148 | ||
1da177e4 LT |
5149 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
5150 | return nfserr_inval; | |
5151 | ||
ca364317 | 5152 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 5153 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
5154 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
5155 | return status; | |
5156 | } | |
5157 | ||
1da177e4 | 5158 | if (lock->lk_is_new) { |
684e5638 BF |
5159 | if (nfsd4_has_session(cstate)) |
5160 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
5161 | memcpy(&lock->v.new.clientid, | |
5162 | &cstate->session->se_client->cl_clientid, | |
5163 | sizeof(clientid_t)); | |
5164 | ||
1da177e4 | 5165 | status = nfserr_stale_clientid; |
2c142baa | 5166 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 5167 | goto out; |
1da177e4 | 5168 | |
1da177e4 | 5169 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 5170 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
5171 | lock->lk_new_open_seqid, |
5172 | &lock->lk_new_open_stateid, | |
3320fef1 | 5173 | &open_stp, nn); |
37515177 | 5174 | if (status) |
1da177e4 | 5175 | goto out; |
fe0750e5 | 5176 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 5177 | status = nfserr_bad_stateid; |
684e5638 | 5178 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
5179 | &lock->v.new.clientid)) |
5180 | goto out; | |
64a284d0 | 5181 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 5182 | &lock_stp, &new); |
3d0fabd5 | 5183 | } else { |
dd453dfd | 5184 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
5185 | lock->lk_old_lock_seqid, |
5186 | &lock->lk_old_lock_stateid, | |
3320fef1 | 5187 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 5188 | } |
e1aaa891 BF |
5189 | if (status) |
5190 | goto out; | |
64a284d0 | 5191 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 5192 | |
b34f27aa BF |
5193 | lkflg = setlkflg(lock->lk_type); |
5194 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5195 | if (status) | |
5196 | goto out; | |
5197 | ||
0dd395dc | 5198 | status = nfserr_grace; |
3320fef1 | 5199 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5200 | goto out; |
5201 | status = nfserr_no_grace; | |
3320fef1 | 5202 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5203 | goto out; |
5204 | ||
21179d81 JL |
5205 | file_lock = locks_alloc_lock(); |
5206 | if (!file_lock) { | |
5207 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5208 | status = nfserr_jukebox; | |
5209 | goto out; | |
5210 | } | |
5211 | ||
11b9164a | 5212 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5213 | locks_init_lock(file_lock); |
1da177e4 LT |
5214 | switch (lock->lk_type) { |
5215 | case NFS4_READ_LT: | |
5216 | case NFS4_READW_LT: | |
7214e860 JL |
5217 | spin_lock(&fp->fi_lock); |
5218 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5219 | if (filp) |
5220 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5221 | spin_unlock(&fp->fi_lock); |
21179d81 | 5222 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5223 | break; |
1da177e4 LT |
5224 | case NFS4_WRITE_LT: |
5225 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5226 | spin_lock(&fp->fi_lock); |
5227 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5228 | if (filp) |
5229 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5230 | spin_unlock(&fp->fi_lock); |
21179d81 | 5231 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5232 | break; |
1da177e4 LT |
5233 | default: |
5234 | status = nfserr_inval; | |
5235 | goto out; | |
5236 | } | |
f9d7562f BF |
5237 | if (!filp) { |
5238 | status = nfserr_openmode; | |
5239 | goto out; | |
5240 | } | |
21179d81 JL |
5241 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5242 | file_lock->fl_pid = current->tgid; | |
5243 | file_lock->fl_file = filp; | |
5244 | file_lock->fl_flags = FL_POSIX; | |
5245 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5246 | file_lock->fl_start = lock->lk_offset; | |
5247 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5248 | nfs4_transform_lock_offset(file_lock); | |
5249 | ||
5250 | conflock = locks_alloc_lock(); | |
5251 | if (!conflock) { | |
5252 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5253 | status = nfserr_jukebox; | |
5254 | goto out; | |
5255 | } | |
1da177e4 | 5256 | |
21179d81 | 5257 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5258 | switch (-err) { |
1da177e4 | 5259 | case 0: /* success! */ |
dcef0413 BF |
5260 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5261 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5262 | sizeof(stateid_t)); |
b8dd7b9a | 5263 | status = 0; |
eb76b3fd AA |
5264 | break; |
5265 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5266 | status = nfserr_denied; | |
5267 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5268 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5269 | break; |
1da177e4 LT |
5270 | case (EDEADLK): |
5271 | status = nfserr_deadlock; | |
eb76b3fd | 5272 | break; |
3e772463 | 5273 | default: |
fd85b817 | 5274 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5275 | status = nfserrno(err); |
eb76b3fd | 5276 | break; |
1da177e4 | 5277 | } |
1da177e4 | 5278 | out: |
de18643d TM |
5279 | if (filp) |
5280 | fput(filp); | |
5db1c03f JL |
5281 | if (lock_stp) { |
5282 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
5283 | if (cstate->replay_owner && | |
5284 | cstate->replay_owner != &lock_sop->lo_owner && | |
5285 | seqid_mutating_err(ntohl(status))) | |
5286 | lock_sop->lo_owner.so_seqid++; | |
5287 | ||
5288 | /* | |
5289 | * If this is a new, never-before-used stateid, and we are | |
5290 | * returning an error, then just go ahead and release it. | |
5291 | */ | |
5292 | if (status && new) | |
5293 | release_lock_stateid(lock_stp); | |
5294 | ||
3d0fabd5 | 5295 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 5296 | } |
0667b1e9 TM |
5297 | if (open_stp) |
5298 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 5299 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5300 | if (file_lock) |
5301 | locks_free_lock(file_lock); | |
5302 | if (conflock) | |
5303 | locks_free_lock(conflock); | |
1da177e4 LT |
5304 | return status; |
5305 | } | |
5306 | ||
55ef1274 BF |
5307 | /* |
5308 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5309 | * so we do a temporary open here just to get an open file to pass to | |
5310 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5311 | * inode operation.) | |
5312 | */ | |
04da6e9d | 5313 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5314 | { |
5315 | struct file *file; | |
04da6e9d AV |
5316 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5317 | if (!err) { | |
5318 | err = nfserrno(vfs_test_lock(file, lock)); | |
5319 | nfsd_close(file); | |
5320 | } | |
55ef1274 BF |
5321 | return err; |
5322 | } | |
5323 | ||
1da177e4 LT |
5324 | /* |
5325 | * LOCKT operation | |
5326 | */ | |
b37ad28b | 5327 | __be32 |
ca364317 BF |
5328 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5329 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5330 | { |
21179d81 | 5331 | struct file_lock *file_lock = NULL; |
5db1c03f | 5332 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 5333 | __be32 status; |
7f2210fa | 5334 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5335 | |
5ccb0066 | 5336 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5337 | return nfserr_grace; |
5338 | ||
5339 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5340 | return nfserr_inval; | |
5341 | ||
9b2ef62b | 5342 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5343 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5344 | if (status) |
5345 | goto out; | |
5346 | } | |
1da177e4 | 5347 | |
75c096f7 | 5348 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5349 | goto out; |
1da177e4 | 5350 | |
21179d81 JL |
5351 | file_lock = locks_alloc_lock(); |
5352 | if (!file_lock) { | |
5353 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5354 | status = nfserr_jukebox; | |
5355 | goto out; | |
5356 | } | |
5357 | locks_init_lock(file_lock); | |
1da177e4 LT |
5358 | switch (lockt->lt_type) { |
5359 | case NFS4_READ_LT: | |
5360 | case NFS4_READW_LT: | |
21179d81 | 5361 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5362 | break; |
5363 | case NFS4_WRITE_LT: | |
5364 | case NFS4_WRITEW_LT: | |
21179d81 | 5365 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5366 | break; |
5367 | default: | |
2fdada03 | 5368 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5369 | status = nfserr_inval; |
5370 | goto out; | |
5371 | } | |
5372 | ||
d4f0489f TM |
5373 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, |
5374 | cstate->clp); | |
fe0750e5 | 5375 | if (lo) |
21179d81 JL |
5376 | file_lock->fl_owner = (fl_owner_t)lo; |
5377 | file_lock->fl_pid = current->tgid; | |
5378 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5379 | |
21179d81 JL |
5380 | file_lock->fl_start = lockt->lt_offset; |
5381 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5382 | |
21179d81 | 5383 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5384 | |
21179d81 | 5385 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5386 | if (status) |
fd85b817 | 5387 | goto out; |
04da6e9d | 5388 | |
21179d81 | 5389 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5390 | status = nfserr_denied; |
21179d81 | 5391 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5392 | } |
5393 | out: | |
5db1c03f JL |
5394 | if (lo) |
5395 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
5396 | if (file_lock) |
5397 | locks_free_lock(file_lock); | |
1da177e4 LT |
5398 | return status; |
5399 | } | |
5400 | ||
b37ad28b | 5401 | __be32 |
ca364317 | 5402 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5403 | struct nfsd4_locku *locku) |
1da177e4 | 5404 | { |
dcef0413 | 5405 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5406 | struct file *filp = NULL; |
21179d81 | 5407 | struct file_lock *file_lock = NULL; |
b37ad28b | 5408 | __be32 status; |
b8dd7b9a | 5409 | int err; |
3320fef1 SK |
5410 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5411 | ||
1da177e4 LT |
5412 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5413 | (long long) locku->lu_offset, | |
5414 | (long long) locku->lu_length); | |
5415 | ||
5416 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5417 | return nfserr_inval; | |
5418 | ||
9072d5c6 | 5419 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5420 | &locku->lu_stateid, NFS4_LOCK_STID, |
5421 | &stp, nn); | |
9072d5c6 | 5422 | if (status) |
1da177e4 | 5423 | goto out; |
11b9164a | 5424 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5425 | if (!filp) { |
5426 | status = nfserr_lock_range; | |
858cc573 | 5427 | goto put_stateid; |
f9d7562f | 5428 | } |
21179d81 JL |
5429 | file_lock = locks_alloc_lock(); |
5430 | if (!file_lock) { | |
5431 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5432 | status = nfserr_jukebox; | |
de18643d | 5433 | goto fput; |
21179d81 JL |
5434 | } |
5435 | locks_init_lock(file_lock); | |
5436 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5437 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5438 | file_lock->fl_pid = current->tgid; |
5439 | file_lock->fl_file = filp; | |
5440 | file_lock->fl_flags = FL_POSIX; | |
5441 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5442 | file_lock->fl_start = locku->lu_offset; | |
5443 | ||
5444 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5445 | locku->lu_length); | |
5446 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5447 | |
21179d81 | 5448 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5449 | if (err) { |
fd85b817 | 5450 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5451 | goto out_nfserr; |
5452 | } | |
dcef0413 BF |
5453 | update_stateid(&stp->st_stid.sc_stateid); |
5454 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5455 | fput: |
5456 | fput(filp); | |
858cc573 TM |
5457 | put_stateid: |
5458 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5459 | out: |
9411b1d4 | 5460 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
5461 | if (file_lock) |
5462 | locks_free_lock(file_lock); | |
1da177e4 LT |
5463 | return status; |
5464 | ||
5465 | out_nfserr: | |
b8dd7b9a | 5466 | status = nfserrno(err); |
de18643d | 5467 | goto fput; |
1da177e4 LT |
5468 | } |
5469 | ||
5470 | /* | |
5471 | * returns | |
f9c00c3a JL |
5472 | * true: locks held by lockowner |
5473 | * false: no locks held by lockowner | |
1da177e4 | 5474 | */ |
f9c00c3a JL |
5475 | static bool |
5476 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5477 | { |
5478 | struct file_lock **flpp; | |
f9c00c3a JL |
5479 | int status = false; |
5480 | struct file *filp = find_any_file(fp); | |
5481 | struct inode *inode; | |
5482 | ||
5483 | if (!filp) { | |
5484 | /* Any valid lock stateid should have some sort of access */ | |
5485 | WARN_ON_ONCE(1); | |
5486 | return status; | |
5487 | } | |
5488 | ||
5489 | inode = file_inode(filp); | |
1da177e4 | 5490 | |
1c8c601a | 5491 | spin_lock(&inode->i_lock); |
1da177e4 | 5492 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5493 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5494 | status = true; |
5495 | break; | |
796dadfd | 5496 | } |
1da177e4 | 5497 | } |
1c8c601a | 5498 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5499 | fput(filp); |
1da177e4 LT |
5500 | return status; |
5501 | } | |
5502 | ||
b37ad28b | 5503 | __be32 |
b591480b BF |
5504 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5505 | struct nfsd4_compound_state *cstate, | |
5506 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5507 | { |
5508 | clientid_t *clid = &rlockowner->rl_clientid; | |
882e9d25 JL |
5509 | struct nfs4_stateowner *sop; |
5510 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 5511 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5512 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 5513 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 5514 | __be32 status; |
7f2210fa | 5515 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 5516 | struct nfs4_client *clp; |
1da177e4 LT |
5517 | |
5518 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5519 | clid->cl_boot, clid->cl_id); | |
5520 | ||
4b24ca7d | 5521 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 5522 | if (status) |
51f5e783 | 5523 | return status; |
9b2ef62b | 5524 | |
d4f0489f | 5525 | clp = cstate->clp; |
fd44907c | 5526 | /* Find the matching lock stateowner */ |
d4f0489f | 5527 | spin_lock(&clp->cl_lock); |
882e9d25 | 5528 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 5529 | so_strhash) { |
fd44907c | 5530 | |
882e9d25 JL |
5531 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
5532 | continue; | |
fd44907c | 5533 | |
882e9d25 JL |
5534 | /* see if there are still any locks associated with it */ |
5535 | lo = lockowner(sop); | |
5536 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5537 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
5538 | status = nfserr_locks_held; | |
5539 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 5540 | return status; |
882e9d25 | 5541 | } |
5adfd885 | 5542 | } |
882e9d25 JL |
5543 | |
5544 | atomic_inc(&sop->so_count); | |
5545 | break; | |
1da177e4 | 5546 | } |
c58c6610 | 5547 | spin_unlock(&clp->cl_lock); |
882e9d25 JL |
5548 | if (lo) |
5549 | release_lockowner(lo); | |
1da177e4 LT |
5550 | return status; |
5551 | } | |
5552 | ||
5553 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5554 | alloc_reclaim(void) |
1da177e4 | 5555 | { |
a55370a3 | 5556 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5557 | } |
5558 | ||
0ce0c2b5 | 5559 | bool |
52e19c09 | 5560 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5561 | { |
0ce0c2b5 | 5562 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5563 | |
52e19c09 | 5564 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5565 | return (crp && crp->cr_clp); |
c7b9a459 N |
5566 | } |
5567 | ||
1da177e4 LT |
5568 | /* |
5569 | * failure => all reset bets are off, nfserr_no_grace... | |
5570 | */ | |
772a9bbb | 5571 | struct nfs4_client_reclaim * |
52e19c09 | 5572 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5573 | { |
5574 | unsigned int strhashval; | |
772a9bbb | 5575 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5576 | |
a55370a3 N |
5577 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5578 | crp = alloc_reclaim(); | |
772a9bbb JL |
5579 | if (crp) { |
5580 | strhashval = clientstr_hashval(name); | |
5581 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5582 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5583 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5584 | crp->cr_clp = NULL; |
52e19c09 | 5585 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5586 | } |
5587 | return crp; | |
1da177e4 LT |
5588 | } |
5589 | ||
ce30e539 | 5590 | void |
52e19c09 | 5591 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5592 | { |
5593 | list_del(&crp->cr_strhash); | |
5594 | kfree(crp); | |
52e19c09 | 5595 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5596 | } |
5597 | ||
2a4317c5 | 5598 | void |
52e19c09 | 5599 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5600 | { |
5601 | struct nfs4_client_reclaim *crp = NULL; | |
5602 | int i; | |
5603 | ||
1da177e4 | 5604 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5605 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5606 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5607 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5608 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5609 | } |
5610 | } | |
063b0fb9 | 5611 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5612 | } |
5613 | ||
5614 | /* | |
5615 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5616 | struct nfs4_client_reclaim * |
52e19c09 | 5617 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5618 | { |
5619 | unsigned int strhashval; | |
1da177e4 LT |
5620 | struct nfs4_client_reclaim *crp = NULL; |
5621 | ||
278c931c | 5622 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5623 | |
278c931c | 5624 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5625 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5626 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5627 | return crp; |
5628 | } | |
5629 | } | |
5630 | return NULL; | |
5631 | } | |
5632 | ||
5633 | /* | |
5634 | * Called from OPEN. Look for clientid in reclaim list. | |
5635 | */ | |
b37ad28b | 5636 | __be32 |
0fe492db TM |
5637 | nfs4_check_open_reclaim(clientid_t *clid, |
5638 | struct nfsd4_compound_state *cstate, | |
5639 | struct nfsd_net *nn) | |
1da177e4 | 5640 | { |
0fe492db | 5641 | __be32 status; |
a52d726b JL |
5642 | |
5643 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5644 | status = lookup_clientid(clid, cstate, nn); |
5645 | if (status) | |
a52d726b JL |
5646 | return nfserr_reclaim_bad; |
5647 | ||
0fe492db TM |
5648 | if (nfsd4_client_record_check(cstate->clp)) |
5649 | return nfserr_reclaim_bad; | |
5650 | ||
5651 | return nfs_ok; | |
1da177e4 LT |
5652 | } |
5653 | ||
65178db4 | 5654 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
5655 | static inline void |
5656 | put_client(struct nfs4_client *clp) | |
5657 | { | |
5658 | atomic_dec(&clp->cl_refcount); | |
5659 | } | |
5660 | ||
285abdee JL |
5661 | static struct nfs4_client * |
5662 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
5663 | { | |
5664 | struct nfs4_client *clp; | |
5665 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5666 | nfsd_net_id); | |
5667 | ||
5668 | if (!nfsd_netns_ready(nn)) | |
5669 | return NULL; | |
5670 | ||
5671 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5672 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5673 | return clp; | |
5674 | } | |
5675 | return NULL; | |
5676 | } | |
5677 | ||
7ec0e36f | 5678 | u64 |
285abdee | 5679 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
5680 | { |
5681 | struct nfs4_client *clp; | |
5682 | u64 count = 0; | |
5683 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5684 | nfsd_net_id); | |
5685 | char buf[INET6_ADDRSTRLEN]; | |
5686 | ||
5687 | if (!nfsd_netns_ready(nn)) | |
5688 | return 0; | |
5689 | ||
5690 | spin_lock(&nn->client_lock); | |
5691 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5692 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
5693 | pr_info("NFS Client: %s\n", buf); | |
5694 | ++count; | |
5695 | } | |
5696 | spin_unlock(&nn->client_lock); | |
5697 | ||
5698 | return count; | |
5699 | } | |
65178db4 | 5700 | |
a0926d15 | 5701 | u64 |
285abdee | 5702 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
5703 | { |
5704 | u64 count = 0; | |
5705 | struct nfs4_client *clp; | |
5706 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5707 | nfsd_net_id); | |
5708 | ||
5709 | if (!nfsd_netns_ready(nn)) | |
5710 | return count; | |
5711 | ||
5712 | spin_lock(&nn->client_lock); | |
5713 | clp = nfsd_find_client(addr, addr_size); | |
5714 | if (clp) { | |
5715 | if (mark_client_expired_locked(clp) == nfs_ok) | |
5716 | ++count; | |
5717 | else | |
5718 | clp = NULL; | |
5719 | } | |
5720 | spin_unlock(&nn->client_lock); | |
5721 | ||
5722 | if (clp) | |
5723 | expire_client(clp); | |
5724 | ||
5725 | return count; | |
5726 | } | |
5727 | ||
69fc9edf | 5728 | u64 |
285abdee | 5729 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
5730 | { |
5731 | u64 count = 0; | |
5732 | struct nfs4_client *clp, *next; | |
5733 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5734 | nfsd_net_id); | |
5735 | LIST_HEAD(reaplist); | |
5736 | ||
5737 | if (!nfsd_netns_ready(nn)) | |
5738 | return count; | |
5739 | ||
5740 | spin_lock(&nn->client_lock); | |
5741 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
5742 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
5743 | list_add(&clp->cl_lru, &reaplist); | |
5744 | if (max != 0 && ++count >= max) | |
5745 | break; | |
5746 | } | |
5747 | } | |
5748 | spin_unlock(&nn->client_lock); | |
5749 | ||
5750 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
5751 | expire_client(clp); | |
5752 | ||
5753 | return count; | |
5754 | } | |
5755 | ||
184c1847 BS |
5756 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
5757 | const char *type) | |
5758 | { | |
5759 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5760 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5761 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5762 | } | |
5763 | ||
016200c3 JL |
5764 | static void |
5765 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
5766 | struct list_head *collect) | |
5767 | { | |
5768 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
5769 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5770 | nfsd_net_id); | |
5771 | ||
5772 | if (!collect) | |
5773 | return; | |
5774 | ||
5775 | lockdep_assert_held(&nn->client_lock); | |
5776 | atomic_inc(&clp->cl_refcount); | |
5777 | list_add(&lst->st_locks, collect); | |
5778 | } | |
5779 | ||
3c87b9b7 | 5780 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 5781 | struct list_head *collect, |
3c87b9b7 | 5782 | void (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
5783 | { |
5784 | struct nfs4_openowner *oop; | |
fc29171f | 5785 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5786 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5787 | u64 count = 0; |
5788 | ||
016200c3 | 5789 | spin_lock(&clp->cl_lock); |
fc29171f | 5790 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
5791 | list_for_each_entry_safe(stp, st_next, |
5792 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5793 | list_for_each_entry_safe(lst, lst_next, | |
5794 | &stp->st_locks, st_locks) { | |
3738d50e | 5795 | if (func) { |
3c87b9b7 | 5796 | func(lst); |
016200c3 JL |
5797 | nfsd_inject_add_lock_to_list(lst, |
5798 | collect); | |
3738d50e | 5799 | } |
016200c3 JL |
5800 | ++count; |
5801 | /* | |
5802 | * Despite the fact that these functions deal | |
5803 | * with 64-bit integers for "count", we must | |
5804 | * ensure that it doesn't blow up the | |
5805 | * clp->cl_refcount. Throw a warning if we | |
5806 | * start to approach INT_MAX here. | |
5807 | */ | |
5808 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
5809 | if (count == max) | |
5810 | goto out; | |
fc29171f BS |
5811 | } |
5812 | } | |
5813 | } | |
016200c3 JL |
5814 | out: |
5815 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
5816 | |
5817 | return count; | |
5818 | } | |
5819 | ||
016200c3 JL |
5820 | static u64 |
5821 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
5822 | u64 max) | |
fc29171f | 5823 | { |
016200c3 | 5824 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
5825 | } |
5826 | ||
016200c3 JL |
5827 | static u64 |
5828 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 5829 | { |
016200c3 | 5830 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
5831 | nfsd_print_count(clp, count, "locked files"); |
5832 | return count; | |
5833 | } | |
5834 | ||
016200c3 | 5835 | u64 |
285abdee | 5836 | nfsd_inject_print_locks(void) |
016200c3 JL |
5837 | { |
5838 | struct nfs4_client *clp; | |
5839 | u64 count = 0; | |
5840 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5841 | nfsd_net_id); | |
5842 | ||
5843 | if (!nfsd_netns_ready(nn)) | |
5844 | return 0; | |
5845 | ||
5846 | spin_lock(&nn->client_lock); | |
5847 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
5848 | count += nfsd_print_client_locks(clp); | |
5849 | spin_unlock(&nn->client_lock); | |
5850 | ||
5851 | return count; | |
5852 | } | |
5853 | ||
5854 | static void | |
5855 | nfsd_reap_locks(struct list_head *reaplist) | |
5856 | { | |
5857 | struct nfs4_client *clp; | |
5858 | struct nfs4_ol_stateid *stp, *next; | |
5859 | ||
5860 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
5861 | list_del_init(&stp->st_locks); | |
5862 | clp = stp->st_stid.sc_client; | |
5863 | nfs4_put_stid(&stp->st_stid); | |
5864 | put_client(clp); | |
5865 | } | |
5866 | } | |
5867 | ||
5868 | u64 | |
285abdee | 5869 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
5870 | { |
5871 | unsigned int count = 0; | |
5872 | struct nfs4_client *clp; | |
5873 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5874 | nfsd_net_id); | |
5875 | LIST_HEAD(reaplist); | |
5876 | ||
5877 | if (!nfsd_netns_ready(nn)) | |
5878 | return count; | |
5879 | ||
5880 | spin_lock(&nn->client_lock); | |
5881 | clp = nfsd_find_client(addr, addr_size); | |
5882 | if (clp) | |
5883 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
5884 | spin_unlock(&nn->client_lock); | |
5885 | nfsd_reap_locks(&reaplist); | |
5886 | return count; | |
5887 | } | |
5888 | ||
5889 | u64 | |
285abdee | 5890 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
5891 | { |
5892 | u64 count = 0; | |
5893 | struct nfs4_client *clp; | |
5894 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5895 | nfsd_net_id); | |
5896 | LIST_HEAD(reaplist); | |
5897 | ||
5898 | if (!nfsd_netns_ready(nn)) | |
5899 | return count; | |
5900 | ||
5901 | spin_lock(&nn->client_lock); | |
5902 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5903 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
5904 | if (max != 0 && count >= max) | |
5905 | break; | |
5906 | } | |
5907 | spin_unlock(&nn->client_lock); | |
5908 | nfsd_reap_locks(&reaplist); | |
5909 | return count; | |
5910 | } | |
5911 | ||
82e05efa JL |
5912 | static u64 |
5913 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
5914 | struct list_head *collect, | |
5915 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
5916 | { |
5917 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
5918 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
5919 | nfsd_net_id); | |
4dbdbda8 BS |
5920 | u64 count = 0; |
5921 | ||
82e05efa JL |
5922 | lockdep_assert_held(&nn->client_lock); |
5923 | ||
5924 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 5925 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 5926 | if (func) { |
4dbdbda8 | 5927 | func(oop); |
82e05efa JL |
5928 | if (collect) { |
5929 | atomic_inc(&clp->cl_refcount); | |
5930 | list_add(&oop->oo_perclient, collect); | |
5931 | } | |
5932 | } | |
5933 | ++count; | |
5934 | /* | |
5935 | * Despite the fact that these functions deal with | |
5936 | * 64-bit integers for "count", we must ensure that | |
5937 | * it doesn't blow up the clp->cl_refcount. Throw a | |
5938 | * warning if we start to approach INT_MAX here. | |
5939 | */ | |
5940 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
5941 | if (count == max) | |
4dbdbda8 BS |
5942 | break; |
5943 | } | |
82e05efa JL |
5944 | spin_unlock(&clp->cl_lock); |
5945 | ||
5946 | return count; | |
5947 | } | |
5948 | ||
5949 | static u64 | |
5950 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
5951 | { | |
5952 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
5953 | ||
5954 | nfsd_print_count(clp, count, "openowners"); | |
5955 | return count; | |
5956 | } | |
5957 | ||
5958 | static u64 | |
5959 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
5960 | struct list_head *collect, u64 max) | |
5961 | { | |
5962 | return nfsd_foreach_client_openowner(clp, max, collect, | |
5963 | unhash_openowner_locked); | |
5964 | } | |
5965 | ||
5966 | u64 | |
285abdee | 5967 | nfsd_inject_print_openowners(void) |
82e05efa JL |
5968 | { |
5969 | struct nfs4_client *clp; | |
5970 | u64 count = 0; | |
5971 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
5972 | nfsd_net_id); | |
5973 | ||
5974 | if (!nfsd_netns_ready(nn)) | |
5975 | return 0; | |
5976 | ||
5977 | spin_lock(&nn->client_lock); | |
5978 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
5979 | count += nfsd_print_client_openowners(clp); | |
5980 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
5981 | |
5982 | return count; | |
5983 | } | |
5984 | ||
82e05efa JL |
5985 | static void |
5986 | nfsd_reap_openowners(struct list_head *reaplist) | |
5987 | { | |
5988 | struct nfs4_client *clp; | |
5989 | struct nfs4_openowner *oop, *next; | |
5990 | ||
5991 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
5992 | list_del_init(&oop->oo_perclient); | |
5993 | clp = oop->oo_owner.so_client; | |
5994 | release_openowner(oop); | |
5995 | put_client(clp); | |
5996 | } | |
5997 | } | |
5998 | ||
5999 | u64 | |
285abdee JL |
6000 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
6001 | size_t addr_size) | |
4dbdbda8 | 6002 | { |
82e05efa JL |
6003 | unsigned int count = 0; |
6004 | struct nfs4_client *clp; | |
6005 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6006 | nfsd_net_id); | |
6007 | LIST_HEAD(reaplist); | |
6008 | ||
6009 | if (!nfsd_netns_ready(nn)) | |
6010 | return count; | |
6011 | ||
6012 | spin_lock(&nn->client_lock); | |
6013 | clp = nfsd_find_client(addr, addr_size); | |
6014 | if (clp) | |
6015 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
6016 | spin_unlock(&nn->client_lock); | |
6017 | nfsd_reap_openowners(&reaplist); | |
6018 | return count; | |
4dbdbda8 BS |
6019 | } |
6020 | ||
82e05efa | 6021 | u64 |
285abdee | 6022 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 6023 | { |
82e05efa JL |
6024 | u64 count = 0; |
6025 | struct nfs4_client *clp; | |
6026 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6027 | nfsd_net_id); | |
6028 | LIST_HEAD(reaplist); | |
6029 | ||
6030 | if (!nfsd_netns_ready(nn)) | |
6031 | return count; | |
6032 | ||
6033 | spin_lock(&nn->client_lock); | |
6034 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6035 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
6036 | max - count); | |
6037 | if (max != 0 && count >= max) | |
6038 | break; | |
6039 | } | |
6040 | spin_unlock(&nn->client_lock); | |
6041 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
6042 | return count; |
6043 | } | |
6044 | ||
269de30f BS |
6045 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
6046 | struct list_head *victims) | |
6047 | { | |
6048 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
6049 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
6050 | nfsd_net_id); | |
269de30f BS |
6051 | u64 count = 0; |
6052 | ||
98d5c7c5 JL |
6053 | lockdep_assert_held(&nn->client_lock); |
6054 | ||
6055 | spin_lock(&state_lock); | |
269de30f | 6056 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
6057 | if (victims) { |
6058 | /* | |
6059 | * It's not safe to mess with delegations that have a | |
6060 | * non-zero dl_time. They might have already been broken | |
6061 | * and could be processed by the laundromat outside of | |
6062 | * the state_lock. Just leave them be. | |
6063 | */ | |
6064 | if (dp->dl_time != 0) | |
6065 | continue; | |
6066 | ||
98d5c7c5 | 6067 | atomic_inc(&clp->cl_refcount); |
42690676 JL |
6068 | unhash_delegation_locked(dp); |
6069 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 6070 | } |
98d5c7c5 JL |
6071 | ++count; |
6072 | /* | |
6073 | * Despite the fact that these functions deal with | |
6074 | * 64-bit integers for "count", we must ensure that | |
6075 | * it doesn't blow up the clp->cl_refcount. Throw a | |
6076 | * warning if we start to approach INT_MAX here. | |
6077 | */ | |
6078 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
6079 | if (count == max) | |
269de30f BS |
6080 | break; |
6081 | } | |
98d5c7c5 | 6082 | spin_unlock(&state_lock); |
269de30f BS |
6083 | return count; |
6084 | } | |
6085 | ||
98d5c7c5 JL |
6086 | static u64 |
6087 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 6088 | { |
98d5c7c5 | 6089 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 6090 | |
98d5c7c5 JL |
6091 | nfsd_print_count(clp, count, "delegations"); |
6092 | return count; | |
6093 | } | |
6094 | ||
6095 | u64 | |
285abdee | 6096 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
6097 | { |
6098 | struct nfs4_client *clp; | |
6099 | u64 count = 0; | |
6100 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6101 | nfsd_net_id); | |
6102 | ||
6103 | if (!nfsd_netns_ready(nn)) | |
6104 | return 0; | |
269de30f | 6105 | |
98d5c7c5 JL |
6106 | spin_lock(&nn->client_lock); |
6107 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
6108 | count += nfsd_print_client_delegations(clp); | |
6109 | spin_unlock(&nn->client_lock); | |
6110 | ||
6111 | return count; | |
6112 | } | |
6113 | ||
6114 | static void | |
6115 | nfsd_forget_delegations(struct list_head *reaplist) | |
6116 | { | |
6117 | struct nfs4_client *clp; | |
6118 | struct nfs4_delegation *dp, *next; | |
6119 | ||
6120 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 6121 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 6122 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 6123 | revoke_delegation(dp); |
98d5c7c5 | 6124 | put_client(clp); |
2d4a532d | 6125 | } |
98d5c7c5 JL |
6126 | } |
6127 | ||
6128 | u64 | |
285abdee JL |
6129 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
6130 | size_t addr_size) | |
98d5c7c5 JL |
6131 | { |
6132 | u64 count = 0; | |
6133 | struct nfs4_client *clp; | |
6134 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6135 | nfsd_net_id); | |
6136 | LIST_HEAD(reaplist); | |
6137 | ||
6138 | if (!nfsd_netns_ready(nn)) | |
6139 | return count; | |
6140 | ||
6141 | spin_lock(&nn->client_lock); | |
6142 | clp = nfsd_find_client(addr, addr_size); | |
6143 | if (clp) | |
6144 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6145 | spin_unlock(&nn->client_lock); | |
6146 | ||
6147 | nfsd_forget_delegations(&reaplist); | |
6148 | return count; | |
6149 | } | |
269de30f | 6150 | |
98d5c7c5 | 6151 | u64 |
285abdee | 6152 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
6153 | { |
6154 | u64 count = 0; | |
6155 | struct nfs4_client *clp; | |
6156 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6157 | nfsd_net_id); | |
6158 | LIST_HEAD(reaplist); | |
6159 | ||
6160 | if (!nfsd_netns_ready(nn)) | |
6161 | return count; | |
6162 | ||
6163 | spin_lock(&nn->client_lock); | |
6164 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
6165 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6166 | if (max != 0 && count >= max) | |
6167 | break; | |
6168 | } | |
6169 | spin_unlock(&nn->client_lock); | |
6170 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
6171 | return count; |
6172 | } | |
6173 | ||
98d5c7c5 JL |
6174 | static void |
6175 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 6176 | { |
98d5c7c5 JL |
6177 | struct nfs4_client *clp; |
6178 | struct nfs4_delegation *dp, *next; | |
269de30f | 6179 | |
98d5c7c5 | 6180 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 6181 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
6182 | clp = dp->dl_stid.sc_client; |
6183 | /* | |
6184 | * We skipped all entries that had a zero dl_time before, | |
6185 | * so we can now reset the dl_time back to 0. If a delegation | |
6186 | * break comes in now, then it won't make any difference since | |
6187 | * we're recalling it either way. | |
6188 | */ | |
6189 | spin_lock(&state_lock); | |
dff1399f | 6190 | dp->dl_time = 0; |
98d5c7c5 | 6191 | spin_unlock(&state_lock); |
269de30f | 6192 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 6193 | put_client(clp); |
dff1399f | 6194 | } |
98d5c7c5 | 6195 | } |
269de30f | 6196 | |
98d5c7c5 | 6197 | u64 |
285abdee | 6198 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
6199 | size_t addr_size) |
6200 | { | |
6201 | u64 count = 0; | |
6202 | struct nfs4_client *clp; | |
6203 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6204 | nfsd_net_id); | |
6205 | LIST_HEAD(reaplist); | |
6206 | ||
6207 | if (!nfsd_netns_ready(nn)) | |
6208 | return count; | |
6209 | ||
6210 | spin_lock(&nn->client_lock); | |
6211 | clp = nfsd_find_client(addr, addr_size); | |
6212 | if (clp) | |
6213 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
6214 | spin_unlock(&nn->client_lock); | |
6215 | ||
6216 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
6217 | return count; |
6218 | } | |
6219 | ||
98d5c7c5 | 6220 | u64 |
285abdee | 6221 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
6222 | { |
6223 | u64 count = 0; | |
98d5c7c5 JL |
6224 | struct nfs4_client *clp, *next; |
6225 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
6226 | nfsd_net_id); | |
6227 | LIST_HEAD(reaplist); | |
184c1847 | 6228 | |
98d5c7c5 JL |
6229 | if (!nfsd_netns_ready(nn)) |
6230 | return count; | |
184c1847 | 6231 | |
98d5c7c5 JL |
6232 | spin_lock(&nn->client_lock); |
6233 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
6234 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
6235 | if (max != 0 && ++count >= max) | |
6236 | break; | |
6237 | } | |
6238 | spin_unlock(&nn->client_lock); | |
6239 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
6240 | return count; |
6241 | } | |
65178db4 BS |
6242 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
6243 | ||
c2f1a551 MS |
6244 | /* |
6245 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
6246 | * client may quite reasonably hang on to a delegation as long as it has | |
6247 | * the inode cached. This becomes an obvious problem the first time a | |
6248 | * client's inode cache approaches the size of the server's total memory. | |
6249 | * | |
6250 | * For now we avoid this problem by imposing a hard limit on the number | |
6251 | * of delegations, which varies according to the server's memory size. | |
6252 | */ | |
6253 | static void | |
6254 | set_max_delegations(void) | |
6255 | { | |
6256 | /* | |
6257 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
6258 | * estimates suggest that in the worst case (where every delegation | |
6259 | * is for a different inode), a delegation could take about 1.5K, | |
6260 | * giving a worst case usage of about 6% of memory. | |
6261 | */ | |
6262 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
6263 | } | |
6264 | ||
d85ed443 | 6265 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
6266 | { |
6267 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6268 | int i; | |
6269 | ||
6270 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
6271 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6272 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 6273 | goto err; |
0a7ec377 SK |
6274 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
6275 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
6276 | if (!nn->unconf_id_hashtbl) | |
6277 | goto err_unconf_id; | |
1872de0e SK |
6278 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
6279 | SESSION_HASH_SIZE, GFP_KERNEL); | |
6280 | if (!nn->sessionid_hashtbl) | |
6281 | goto err_sessionid; | |
8daae4dc | 6282 | |
382a62e7 | 6283 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 6284 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 6285 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 6286 | } |
1872de0e SK |
6287 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
6288 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 6289 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 6290 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 6291 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 6292 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 6293 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 6294 | spin_lock_init(&nn->client_lock); |
8daae4dc | 6295 | |
09121281 | 6296 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 6297 | get_net(net); |
09121281 | 6298 | |
8daae4dc | 6299 | return 0; |
382a62e7 | 6300 | |
1872de0e | 6301 | err_sessionid: |
9b531137 | 6302 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
6303 | err_unconf_id: |
6304 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
6305 | err: |
6306 | return -ENOMEM; | |
8daae4dc SK |
6307 | } |
6308 | ||
6309 | static void | |
4dce0ac9 | 6310 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
6311 | { |
6312 | int i; | |
6313 | struct nfs4_client *clp = NULL; | |
6314 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6315 | ||
6316 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
6317 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
6318 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6319 | destroy_client(clp); | |
6320 | } | |
6321 | } | |
a99454aa | 6322 | |
2b905635 KM |
6323 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
6324 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
6325 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
6326 | destroy_client(clp); | |
6327 | } | |
a99454aa SK |
6328 | } |
6329 | ||
1872de0e | 6330 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 6331 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 6332 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 6333 | put_net(net); |
8daae4dc SK |
6334 | } |
6335 | ||
f252bc68 | 6336 | int |
d85ed443 | 6337 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 6338 | { |
5e1533c7 | 6339 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
6340 | int ret; |
6341 | ||
d85ed443 | 6342 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
6343 | if (ret) |
6344 | return ret; | |
5e1533c7 | 6345 | nfsd4_client_tracking_init(net); |
2c142baa | 6346 | nn->boot_time = get_seconds(); |
5ccb0066 | 6347 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 6348 | nn->grace_ended = false; |
d85ed443 | 6349 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
6350 | nn->nfsd4_grace, net); |
6351 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
6352 | return 0; |
6353 | } | |
6354 | ||
6355 | /* initialization to perform when the nfsd service is started: */ | |
6356 | ||
6357 | int | |
6358 | nfs4_state_start(void) | |
6359 | { | |
6360 | int ret; | |
6361 | ||
b5a1a81e | 6362 | ret = set_callback_cred(); |
d85ed443 SK |
6363 | if (ret) |
6364 | return -ENOMEM; | |
58da282b | 6365 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
6366 | if (laundry_wq == NULL) { |
6367 | ret = -ENOMEM; | |
6368 | goto out_recovery; | |
6369 | } | |
b5a1a81e BF |
6370 | ret = nfsd4_create_callback_queue(); |
6371 | if (ret) | |
6372 | goto out_free_laundry; | |
09121281 | 6373 | |
c2f1a551 | 6374 | set_max_delegations(); |
d85ed443 | 6375 | |
b5a1a81e | 6376 | return 0; |
d85ed443 | 6377 | |
b5a1a81e BF |
6378 | out_free_laundry: |
6379 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 6380 | out_recovery: |
b5a1a81e | 6381 | return ret; |
1da177e4 LT |
6382 | } |
6383 | ||
f252bc68 | 6384 | void |
4dce0ac9 | 6385 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 6386 | { |
1da177e4 | 6387 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 6388 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 6389 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 6390 | |
4dce0ac9 SK |
6391 | cancel_delayed_work_sync(&nn->laundromat_work); |
6392 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 6393 | |
1da177e4 | 6394 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 6395 | spin_lock(&state_lock); |
e8c69d17 | 6396 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 6397 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
6398 | unhash_delegation_locked(dp); |
6399 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 6400 | } |
cdc97505 | 6401 | spin_unlock(&state_lock); |
1da177e4 LT |
6402 | list_for_each_safe(pos, next, &reaplist) { |
6403 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 6404 | list_del_init(&dp->dl_recall_lru); |
6011695d | 6405 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
6406 | } |
6407 | ||
3320fef1 | 6408 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 6409 | nfs4_state_destroy_net(net); |
1da177e4 LT |
6410 | } |
6411 | ||
6412 | void | |
6413 | nfs4_state_shutdown(void) | |
6414 | { | |
5e8d5c29 | 6415 | destroy_workqueue(laundry_wq); |
c3935e30 | 6416 | nfsd4_destroy_callback_queue(); |
1da177e4 | 6417 | } |
8b70484c TM |
6418 | |
6419 | static void | |
6420 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6421 | { | |
37c593c5 TM |
6422 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
6423 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
6424 | } |
6425 | ||
6426 | static void | |
6427 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
6428 | { | |
37c593c5 TM |
6429 | if (cstate->minorversion) { |
6430 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
6431 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
6432 | } | |
6433 | } | |
6434 | ||
6435 | void | |
6436 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
6437 | { | |
6438 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
6439 | } |
6440 | ||
62cd4a59 TM |
6441 | /* |
6442 | * functions to set current state id | |
6443 | */ | |
9428fe1a TM |
6444 | void |
6445 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6446 | { | |
6447 | put_stateid(cstate, &odp->od_stateid); | |
6448 | } | |
6449 | ||
8b70484c TM |
6450 | void |
6451 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
6452 | { | |
6453 | put_stateid(cstate, &open->op_stateid); | |
6454 | } | |
6455 | ||
62cd4a59 TM |
6456 | void |
6457 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6458 | { | |
6459 | put_stateid(cstate, &close->cl_stateid); | |
6460 | } | |
6461 | ||
6462 | void | |
6463 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
6464 | { | |
6465 | put_stateid(cstate, &lock->lk_resp_stateid); | |
6466 | } | |
6467 | ||
6468 | /* | |
6469 | * functions to consume current state id | |
6470 | */ | |
1e97b519 | 6471 | |
9428fe1a TM |
6472 | void |
6473 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
6474 | { | |
6475 | get_stateid(cstate, &odp->od_stateid); | |
6476 | } | |
6477 | ||
6478 | void | |
6479 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
6480 | { | |
6481 | get_stateid(cstate, &drp->dr_stateid); | |
6482 | } | |
6483 | ||
1e97b519 TM |
6484 | void |
6485 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
6486 | { | |
6487 | get_stateid(cstate, &fsp->fr_stateid); | |
6488 | } | |
6489 | ||
6490 | void | |
6491 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
6492 | { | |
6493 | get_stateid(cstate, &setattr->sa_stateid); | |
6494 | } | |
6495 | ||
8b70484c TM |
6496 | void |
6497 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
6498 | { | |
6499 | get_stateid(cstate, &close->cl_stateid); | |
6500 | } | |
6501 | ||
6502 | void | |
62cd4a59 | 6503 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 6504 | { |
62cd4a59 | 6505 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 6506 | } |
30813e27 TM |
6507 | |
6508 | void | |
6509 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
6510 | { | |
6511 | get_stateid(cstate, &read->rd_stateid); | |
6512 | } | |
6513 | ||
6514 | void | |
6515 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
6516 | { | |
6517 | get_stateid(cstate, &write->wr_stateid); | |
6518 | } |