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 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
abf1135b CH |
88 | static struct kmem_cache *openowner_slab; |
89 | static struct kmem_cache *lockowner_slab; | |
90 | static struct kmem_cache *file_slab; | |
91 | static struct kmem_cache *stateid_slab; | |
92 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 93 | |
1da177e4 LT |
94 | void |
95 | nfs4_lock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_lock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
66b2b9b2 | 100 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 101 | |
f0f51f5c | 102 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 103 | { |
f0f51f5c | 104 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
105 | } |
106 | ||
f0f51f5c | 107 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 108 | { |
f0f51f5c | 109 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
110 | return nfserr_jukebox; |
111 | ses->se_flags |= NFS4_SESSION_DEAD; | |
112 | return nfs_ok; | |
508dc6e1 BH |
113 | } |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
221a6876 BF |
121 | static bool is_client_expired(struct nfs4_client *clp) |
122 | { | |
123 | return clp->cl_time == 0; | |
124 | } | |
125 | ||
126 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
127 | { | |
128 | if (atomic_read(&clp->cl_refcount)) | |
129 | return nfserr_jukebox; | |
130 | clp->cl_time = 0; | |
131 | return nfs_ok; | |
132 | } | |
133 | ||
134 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
135 | { | |
136 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
137 | __be32 ret; | |
138 | ||
139 | spin_lock(&nn->client_lock); | |
140 | ret = mark_client_expired_locked(clp); | |
141 | spin_unlock(&nn->client_lock); | |
142 | return ret; | |
143 | } | |
144 | ||
145 | static __be32 get_client_locked(struct nfs4_client *clp) | |
146 | { | |
147 | if (is_client_expired(clp)) | |
148 | return nfserr_expired; | |
149 | atomic_inc(&clp->cl_refcount); | |
150 | return nfs_ok; | |
151 | } | |
152 | ||
153 | /* must be called under the client_lock */ | |
154 | static inline void | |
155 | renew_client_locked(struct nfs4_client *clp) | |
156 | { | |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
158 | ||
159 | if (is_client_expired(clp)) { | |
160 | WARN_ON(1); | |
161 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
162 | __func__, | |
163 | clp->cl_clientid.cl_boot, | |
164 | clp->cl_clientid.cl_id); | |
165 | return; | |
166 | } | |
167 | ||
168 | dprintk("renewing client (clientid %08x/%08x)\n", | |
169 | clp->cl_clientid.cl_boot, | |
170 | clp->cl_clientid.cl_id); | |
171 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
172 | clp->cl_time = get_seconds(); | |
173 | } | |
174 | ||
175 | static inline void | |
176 | renew_client(struct nfs4_client *clp) | |
177 | { | |
178 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
179 | ||
180 | spin_lock(&nn->client_lock); | |
181 | renew_client_locked(clp); | |
182 | spin_unlock(&nn->client_lock); | |
183 | } | |
184 | ||
ba138435 | 185 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
186 | { |
187 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
188 | return; | |
189 | if (!is_client_expired(clp)) | |
190 | renew_client_locked(clp); | |
191 | } | |
192 | ||
4b24ca7d JL |
193 | static void put_client_renew(struct nfs4_client *clp) |
194 | { | |
195 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
196 | ||
d6c249b4 JL |
197 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
198 | return; | |
199 | if (!is_client_expired(clp)) | |
200 | renew_client_locked(clp); | |
4b24ca7d JL |
201 | spin_unlock(&nn->client_lock); |
202 | } | |
203 | ||
d4e19e70 TM |
204 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
205 | { | |
206 | __be32 status; | |
207 | ||
208 | if (is_session_dead(ses)) | |
209 | return nfserr_badsession; | |
210 | status = get_client_locked(ses->se_client); | |
211 | if (status) | |
212 | return status; | |
213 | atomic_inc(&ses->se_ref); | |
214 | return nfs_ok; | |
215 | } | |
216 | ||
217 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
218 | { | |
219 | struct nfs4_client *clp = ses->se_client; | |
220 | ||
221 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
222 | free_session(ses); | |
223 | put_client_renew_locked(clp); | |
224 | } | |
225 | ||
226 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
227 | { | |
228 | struct nfs4_client *clp = ses->se_client; | |
229 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
230 | ||
231 | spin_lock(&nn->client_lock); | |
232 | nfsd4_put_session_locked(ses); | |
233 | spin_unlock(&nn->client_lock); | |
234 | } | |
235 | ||
236 | ||
1da177e4 LT |
237 | static inline u32 |
238 | opaque_hashval(const void *ptr, int nbytes) | |
239 | { | |
240 | unsigned char *cptr = (unsigned char *) ptr; | |
241 | ||
242 | u32 x = 0; | |
243 | while (nbytes--) { | |
244 | x *= 37; | |
245 | x += *cptr++; | |
246 | } | |
247 | return x; | |
248 | } | |
249 | ||
32513b40 BF |
250 | static void nfsd4_free_file(struct nfs4_file *f) |
251 | { | |
252 | kmem_cache_free(file_slab, f); | |
253 | } | |
254 | ||
13cd2184 N |
255 | static inline void |
256 | put_nfs4_file(struct nfs4_file *fi) | |
257 | { | |
02e1215f JL |
258 | might_lock(&state_lock); |
259 | ||
cdc97505 | 260 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 261 | hlist_del(&fi->fi_hash); |
cdc97505 | 262 | spin_unlock(&state_lock); |
32513b40 | 263 | nfsd4_free_file(fi); |
8b671b80 | 264 | } |
13cd2184 N |
265 | } |
266 | ||
267 | static inline void | |
268 | get_nfs4_file(struct nfs4_file *fi) | |
269 | { | |
8b671b80 | 270 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
271 | } |
272 | ||
de18643d TM |
273 | static struct file * |
274 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
275 | { | |
276 | if (f->fi_fds[oflag]) | |
277 | return get_file(f->fi_fds[oflag]); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | static struct file * | |
282 | find_writeable_file_locked(struct nfs4_file *f) | |
283 | { | |
284 | struct file *ret; | |
285 | ||
286 | lockdep_assert_held(&f->fi_lock); | |
287 | ||
288 | ret = __nfs4_get_fd(f, O_WRONLY); | |
289 | if (!ret) | |
290 | ret = __nfs4_get_fd(f, O_RDWR); | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static struct file * | |
295 | find_writeable_file(struct nfs4_file *f) | |
296 | { | |
297 | struct file *ret; | |
298 | ||
299 | spin_lock(&f->fi_lock); | |
300 | ret = find_writeable_file_locked(f); | |
301 | spin_unlock(&f->fi_lock); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
307 | { | |
308 | struct file *ret; | |
309 | ||
310 | lockdep_assert_held(&f->fi_lock); | |
311 | ||
312 | ret = __nfs4_get_fd(f, O_RDONLY); | |
313 | if (!ret) | |
314 | ret = __nfs4_get_fd(f, O_RDWR); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static struct file * | |
319 | find_readable_file(struct nfs4_file *f) | |
320 | { | |
321 | struct file *ret; | |
322 | ||
323 | spin_lock(&f->fi_lock); | |
324 | ret = find_readable_file_locked(f); | |
325 | spin_unlock(&f->fi_lock); | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static struct file * | |
331 | find_any_file(struct nfs4_file *f) | |
332 | { | |
333 | struct file *ret; | |
334 | ||
335 | spin_lock(&f->fi_lock); | |
336 | ret = __nfs4_get_fd(f, O_RDWR); | |
337 | if (!ret) { | |
338 | ret = __nfs4_get_fd(f, O_WRONLY); | |
339 | if (!ret) | |
340 | ret = __nfs4_get_fd(f, O_RDONLY); | |
341 | } | |
342 | spin_unlock(&f->fi_lock); | |
343 | return ret; | |
344 | } | |
345 | ||
02a3508d | 346 | static atomic_long_t num_delegations; |
697ce9be | 347 | unsigned long max_delegations; |
ef0f3390 N |
348 | |
349 | /* | |
350 | * Open owner state (share locks) | |
351 | */ | |
352 | ||
16bfdaaf BF |
353 | /* hash tables for lock and open owners */ |
354 | #define OWNER_HASH_BITS 8 | |
355 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
356 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 357 | |
16bfdaaf | 358 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
359 | { |
360 | unsigned int ret; | |
361 | ||
362 | ret = opaque_hashval(ownername->data, ownername->len); | |
363 | ret += clientid; | |
16bfdaaf | 364 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 365 | } |
ef0f3390 | 366 | |
ef0f3390 N |
367 | /* hash table for nfs4_file */ |
368 | #define FILE_HASH_BITS 8 | |
369 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 370 | |
ca943217 | 371 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 372 | { |
ca943217 TM |
373 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
374 | } | |
375 | ||
376 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
377 | { | |
378 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
379 | } | |
380 | ||
381 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
382 | { | |
383 | return fh1->fh_size == fh2->fh_size && | |
384 | !memcmp(fh1->fh_base.fh_pad, | |
385 | fh2->fh_base.fh_pad, | |
386 | fh1->fh_size); | |
ddc04c41 BF |
387 | } |
388 | ||
89876f8c | 389 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 390 | |
12659651 JL |
391 | static void |
392 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 393 | { |
7214e860 JL |
394 | lockdep_assert_held(&fp->fi_lock); |
395 | ||
12659651 JL |
396 | if (access & NFS4_SHARE_ACCESS_WRITE) |
397 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
398 | if (access & NFS4_SHARE_ACCESS_READ) | |
399 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
400 | } |
401 | ||
12659651 JL |
402 | static __be32 |
403 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 404 | { |
7214e860 JL |
405 | lockdep_assert_held(&fp->fi_lock); |
406 | ||
12659651 JL |
407 | /* Does this access mode make sense? */ |
408 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
409 | return nfserr_inval; | |
410 | ||
baeb4ff0 JL |
411 | /* Does it conflict with a deny mode already set? */ |
412 | if ((access & fp->fi_share_deny) != 0) | |
413 | return nfserr_share_denied; | |
414 | ||
12659651 JL |
415 | __nfs4_file_get_access(fp, access); |
416 | return nfs_ok; | |
998db52c BF |
417 | } |
418 | ||
baeb4ff0 JL |
419 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
420 | { | |
421 | /* Common case is that there is no deny mode. */ | |
422 | if (deny) { | |
423 | /* Does this deny mode make sense? */ | |
424 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
425 | return nfserr_inval; | |
426 | ||
427 | if ((deny & NFS4_SHARE_DENY_READ) && | |
428 | atomic_read(&fp->fi_access[O_RDONLY])) | |
429 | return nfserr_share_denied; | |
430 | ||
431 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
432 | atomic_read(&fp->fi_access[O_WRONLY])) | |
433 | return nfserr_share_denied; | |
434 | } | |
435 | return nfs_ok; | |
436 | } | |
437 | ||
998db52c | 438 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 439 | { |
de18643d TM |
440 | might_lock(&fp->fi_lock); |
441 | ||
442 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
443 | struct file *f1 = NULL; | |
444 | struct file *f2 = NULL; | |
445 | ||
6d338b51 | 446 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 447 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 448 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
449 | spin_unlock(&fp->fi_lock); |
450 | if (f1) | |
451 | fput(f1); | |
452 | if (f2) | |
453 | fput(f2); | |
f9d7562f BF |
454 | } |
455 | } | |
456 | ||
12659651 | 457 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 458 | { |
12659651 JL |
459 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
460 | ||
461 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 462 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
463 | if (access & NFS4_SHARE_ACCESS_READ) |
464 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
465 | } |
466 | ||
6011695d TM |
467 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
468 | struct kmem_cache *slab) | |
2a74aba7 | 469 | { |
3abdb607 | 470 | struct nfs4_stid *stid; |
6136d2b4 | 471 | int new_id; |
2a74aba7 | 472 | |
f8338834 | 473 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
474 | if (!stid) |
475 | return NULL; | |
476 | ||
4770d722 JL |
477 | idr_preload(GFP_KERNEL); |
478 | spin_lock(&cl->cl_lock); | |
479 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
480 | spin_unlock(&cl->cl_lock); | |
481 | idr_preload_end(); | |
ebd6c707 | 482 | if (new_id < 0) |
3abdb607 | 483 | goto out_free; |
2a74aba7 | 484 | stid->sc_client = cl; |
3abdb607 BF |
485 | stid->sc_stateid.si_opaque.so_id = new_id; |
486 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 487 | /* Will be incremented before return to client: */ |
72c0b0fb | 488 | atomic_set(&stid->sc_count, 1); |
996e0938 | 489 | |
996e0938 | 490 | /* |
3abdb607 BF |
491 | * It shouldn't be a problem to reuse an opaque stateid value. |
492 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
493 | * example, a stray write retransmission could be accepted by | |
494 | * the server when it should have been rejected. Therefore, | |
495 | * adopt a trick from the sctp code to attempt to maximize the | |
496 | * amount of time until an id is reused, by ensuring they always | |
497 | * "increase" (mod INT_MAX): | |
996e0938 | 498 | */ |
3abdb607 BF |
499 | return stid; |
500 | out_free: | |
2c44a234 | 501 | kmem_cache_free(slab, stid); |
3abdb607 | 502 | return NULL; |
2a74aba7 BF |
503 | } |
504 | ||
b49e084d | 505 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 506 | { |
6011695d TM |
507 | struct nfs4_stid *stid; |
508 | struct nfs4_ol_stateid *stp; | |
509 | ||
510 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
511 | if (!stid) | |
512 | return NULL; | |
513 | ||
514 | stp = openlockstateid(stid); | |
515 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
516 | return stp; | |
517 | } | |
518 | ||
519 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
520 | { | |
6011695d TM |
521 | kmem_cache_free(deleg_slab, stid); |
522 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
523 | } |
524 | ||
6282cd56 N |
525 | /* |
526 | * When we recall a delegation, we should be careful not to hand it | |
527 | * out again straight away. | |
528 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
529 | * in which the filehandles of recalled delegations are "stored". | |
530 | * If a filehandle appear in either filter, a delegation is blocked. | |
531 | * When a delegation is recalled, the filehandle is stored in the "new" | |
532 | * filter. | |
533 | * Every 30 seconds we swap the filters and clear the "new" one, | |
534 | * unless both are empty of course. | |
535 | * | |
536 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
537 | * low 3 bytes as hash-table indices. | |
538 | * | |
f54fe962 | 539 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
540 | * is used to manage concurrent access. Testing does not need the lock |
541 | * except when swapping the two filters. | |
542 | */ | |
f54fe962 | 543 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
544 | static struct bloom_pair { |
545 | int entries, old_entries; | |
546 | time_t swap_time; | |
547 | int new; /* index into 'set' */ | |
548 | DECLARE_BITMAP(set[2], 256); | |
549 | } blocked_delegations; | |
550 | ||
551 | static int delegation_blocked(struct knfsd_fh *fh) | |
552 | { | |
553 | u32 hash; | |
554 | struct bloom_pair *bd = &blocked_delegations; | |
555 | ||
556 | if (bd->entries == 0) | |
557 | return 0; | |
558 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 559 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
560 | if (seconds_since_boot() - bd->swap_time > 30) { |
561 | bd->entries -= bd->old_entries; | |
562 | bd->old_entries = bd->entries; | |
563 | memset(bd->set[bd->new], 0, | |
564 | sizeof(bd->set[0])); | |
565 | bd->new = 1-bd->new; | |
566 | bd->swap_time = seconds_since_boot(); | |
567 | } | |
f54fe962 | 568 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
569 | } |
570 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
571 | if (test_bit(hash&255, bd->set[0]) && | |
572 | test_bit((hash>>8)&255, bd->set[0]) && | |
573 | test_bit((hash>>16)&255, bd->set[0])) | |
574 | return 1; | |
575 | ||
576 | if (test_bit(hash&255, bd->set[1]) && | |
577 | test_bit((hash>>8)&255, bd->set[1]) && | |
578 | test_bit((hash>>16)&255, bd->set[1])) | |
579 | return 1; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | static void block_delegations(struct knfsd_fh *fh) | |
585 | { | |
586 | u32 hash; | |
587 | struct bloom_pair *bd = &blocked_delegations; | |
588 | ||
589 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
590 | ||
f54fe962 | 591 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
592 | __set_bit(hash&255, bd->set[bd->new]); |
593 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
594 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
595 | if (bd->entries == 0) | |
596 | bd->swap_time = seconds_since_boot(); | |
597 | bd->entries += 1; | |
f54fe962 | 598 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
599 | } |
600 | ||
1da177e4 | 601 | static struct nfs4_delegation * |
f9416e28 | 602 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
603 | { |
604 | struct nfs4_delegation *dp; | |
02a3508d | 605 | long n; |
1da177e4 LT |
606 | |
607 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
608 | n = atomic_long_inc_return(&num_delegations); |
609 | if (n < 0 || n > max_delegations) | |
610 | goto out_dec; | |
6282cd56 | 611 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 612 | goto out_dec; |
996e0938 | 613 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 614 | if (dp == NULL) |
02a3508d | 615 | goto out_dec; |
6011695d TM |
616 | |
617 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
618 | /* |
619 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
620 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
621 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
622 | */ |
623 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
624 | INIT_LIST_HEAD(&dp->dl_perfile); |
625 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 626 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 627 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 628 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 629 | return dp; |
02a3508d TM |
630 | out_dec: |
631 | atomic_long_dec(&num_delegations); | |
632 | return NULL; | |
1da177e4 LT |
633 | } |
634 | ||
635 | void | |
6011695d | 636 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 637 | { |
11b9164a | 638 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
639 | struct nfs4_client *clp = s->sc_client; |
640 | ||
4770d722 JL |
641 | might_lock(&clp->cl_lock); |
642 | ||
643 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) | |
6011695d TM |
644 | return; |
645 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
4770d722 | 646 | spin_unlock(&clp->cl_lock); |
6011695d | 647 | s->sc_free(s); |
11b9164a TM |
648 | if (fp) |
649 | put_nfs4_file(fp); | |
1da177e4 LT |
650 | } |
651 | ||
acfdf5c3 | 652 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 653 | { |
417c6629 JL |
654 | lockdep_assert_held(&state_lock); |
655 | ||
cbf7a75b BF |
656 | if (!fp->fi_lease) |
657 | return; | |
acfdf5c3 BF |
658 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
659 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
660 | fp->fi_lease = NULL; | |
4ee63624 | 661 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
662 | fp->fi_deleg_file = NULL; |
663 | } | |
1da177e4 LT |
664 | } |
665 | ||
6136d2b4 BF |
666 | static void unhash_stid(struct nfs4_stid *s) |
667 | { | |
3abdb607 | 668 | s->sc_type = 0; |
6136d2b4 BF |
669 | } |
670 | ||
931ee56c BH |
671 | static void |
672 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
673 | { | |
cdc97505 | 674 | lockdep_assert_held(&state_lock); |
417c6629 | 675 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 676 | |
67cb1279 | 677 | atomic_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 678 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
679 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
680 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
681 | } | |
682 | ||
1da177e4 | 683 | static void |
42690676 | 684 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 685 | { |
11b9164a | 686 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 687 | |
42690676 JL |
688 | lockdep_assert_held(&state_lock); |
689 | ||
b0fc29d6 | 690 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
691 | /* Ensure that deleg break won't try to requeue it */ |
692 | ++dp->dl_time; | |
417c6629 | 693 | spin_lock(&fp->fi_lock); |
931ee56c | 694 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 695 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
696 | list_del_init(&dp->dl_perfile); |
697 | spin_unlock(&fp->fi_lock); | |
f8338834 | 698 | if (fp) |
02e1215f | 699 | nfs4_put_deleg_lease(fp); |
3bd64a5b BF |
700 | } |
701 | ||
3bd64a5b BF |
702 | static void destroy_delegation(struct nfs4_delegation *dp) |
703 | { | |
42690676 JL |
704 | spin_lock(&state_lock); |
705 | unhash_delegation_locked(dp); | |
706 | spin_unlock(&state_lock); | |
6011695d | 707 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b BF |
708 | } |
709 | ||
710 | static void revoke_delegation(struct nfs4_delegation *dp) | |
711 | { | |
712 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
713 | ||
2d4a532d JL |
714 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
715 | ||
3bd64a5b | 716 | if (clp->cl_minorversion == 0) |
6011695d | 717 | nfs4_put_stid(&dp->dl_stid); |
3bd64a5b | 718 | else { |
3bd64a5b | 719 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
2d4a532d JL |
720 | spin_lock(&clp->cl_lock); |
721 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
722 | spin_unlock(&clp->cl_lock); | |
3bd64a5b BF |
723 | } |
724 | } | |
725 | ||
1da177e4 LT |
726 | /* |
727 | * SETCLIENTID state | |
728 | */ | |
729 | ||
ddc04c41 BF |
730 | static unsigned int clientid_hashval(u32 id) |
731 | { | |
732 | return id & CLIENT_HASH_MASK; | |
733 | } | |
734 | ||
735 | static unsigned int clientstr_hashval(const char *name) | |
736 | { | |
737 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
738 | } | |
739 | ||
f9d7562f BF |
740 | /* |
741 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
742 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
743 | * only what share bits are currently in force, but also what | |
744 | * combinations of share bits previous opens have used. This allows us | |
745 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
746 | * return an error if the client attempt to downgrade to a combination | |
747 | * of share bits not explicable by closing some of its previous opens. | |
748 | * | |
749 | * XXX: This enforcement is actually incomplete, since we don't keep | |
750 | * track of access/deny bit combinations; so, e.g., we allow: | |
751 | * | |
752 | * OPEN allow read, deny write | |
753 | * OPEN allow both, deny none | |
754 | * DOWNGRADE allow read, deny none | |
755 | * | |
756 | * which we should reject. | |
757 | */ | |
5ae037e5 JL |
758 | static unsigned int |
759 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 760 | int i; |
5ae037e5 | 761 | unsigned int access = 0; |
f9d7562f | 762 | |
f9d7562f BF |
763 | for (i = 1; i < 4; i++) { |
764 | if (test_bit(i, &bmap)) | |
5ae037e5 | 765 | access |= i; |
f9d7562f | 766 | } |
5ae037e5 | 767 | return access; |
f9d7562f BF |
768 | } |
769 | ||
82c5ff1b JL |
770 | /* set share access for a given stateid */ |
771 | static inline void | |
772 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
773 | { | |
c11c591f JL |
774 | unsigned char mask = 1 << access; |
775 | ||
776 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
777 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
778 | } |
779 | ||
780 | /* clear share access for a given stateid */ | |
781 | static inline void | |
782 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
783 | { | |
c11c591f JL |
784 | unsigned char mask = 1 << access; |
785 | ||
786 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
787 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
788 | } |
789 | ||
790 | /* test whether a given stateid has access */ | |
791 | static inline bool | |
792 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
793 | { | |
c11c591f JL |
794 | unsigned char mask = 1 << access; |
795 | ||
796 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
797 | } |
798 | ||
ce0fc43c JL |
799 | /* set share deny for a given stateid */ |
800 | static inline void | |
c11c591f | 801 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 802 | { |
c11c591f JL |
803 | unsigned char mask = 1 << deny; |
804 | ||
805 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
806 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
807 | } |
808 | ||
809 | /* clear share deny for a given stateid */ | |
810 | static inline void | |
c11c591f | 811 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 812 | { |
c11c591f JL |
813 | unsigned char mask = 1 << deny; |
814 | ||
815 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
816 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
817 | } |
818 | ||
819 | /* test whether a given stateid is denying specific access */ | |
820 | static inline bool | |
c11c591f | 821 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 822 | { |
c11c591f JL |
823 | unsigned char mask = 1 << deny; |
824 | ||
825 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
826 | } |
827 | ||
828 | static int nfs4_access_to_omode(u32 access) | |
829 | { | |
8f34a430 | 830 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
831 | case NFS4_SHARE_ACCESS_READ: |
832 | return O_RDONLY; | |
833 | case NFS4_SHARE_ACCESS_WRITE: | |
834 | return O_WRONLY; | |
835 | case NFS4_SHARE_ACCESS_BOTH: | |
836 | return O_RDWR; | |
837 | } | |
063b0fb9 BF |
838 | WARN_ON_ONCE(1); |
839 | return O_RDONLY; | |
f9d7562f BF |
840 | } |
841 | ||
baeb4ff0 JL |
842 | /* |
843 | * A stateid that had a deny mode associated with it is being released | |
844 | * or downgraded. Recalculate the deny mode on the file. | |
845 | */ | |
846 | static void | |
847 | recalculate_deny_mode(struct nfs4_file *fp) | |
848 | { | |
849 | struct nfs4_ol_stateid *stp; | |
850 | ||
851 | spin_lock(&fp->fi_lock); | |
852 | fp->fi_share_deny = 0; | |
853 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
854 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
855 | spin_unlock(&fp->fi_lock); | |
856 | } | |
857 | ||
858 | static void | |
859 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
860 | { | |
861 | int i; | |
862 | bool change = false; | |
863 | ||
864 | for (i = 1; i < 4; i++) { | |
865 | if ((i & deny) != i) { | |
866 | change = true; | |
867 | clear_deny(i, stp); | |
868 | } | |
869 | } | |
870 | ||
871 | /* Recalculate per-file deny mode if there was a change */ | |
872 | if (change) | |
11b9164a | 873 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
874 | } |
875 | ||
82c5ff1b JL |
876 | /* release all access and file references for a given stateid */ |
877 | static void | |
878 | release_all_access(struct nfs4_ol_stateid *stp) | |
879 | { | |
880 | int i; | |
11b9164a | 881 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
882 | |
883 | if (fp && stp->st_deny_bmap != 0) | |
884 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
885 | |
886 | for (i = 1; i < 4; i++) { | |
887 | if (test_access(i, stp)) | |
11b9164a | 888 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
889 | clear_access(i, stp); |
890 | } | |
891 | } | |
892 | ||
dcef0413 | 893 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 894 | { |
11b9164a | 895 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 896 | |
1c755dc1 JL |
897 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
898 | ||
1d31a253 | 899 | spin_lock(&fp->fi_lock); |
529d7b2a | 900 | list_del(&stp->st_perfile); |
1d31a253 | 901 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
902 | list_del(&stp->st_perstateowner); |
903 | } | |
904 | ||
6011695d | 905 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 906 | { |
6011695d | 907 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 908 | |
6011695d | 909 | release_all_access(stp); |
6011695d | 910 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
911 | } |
912 | ||
b49e084d | 913 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 914 | { |
b49e084d JL |
915 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
916 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
917 | struct file *file; |
918 | ||
b49e084d JL |
919 | file = find_any_file(stp->st_stid.sc_file); |
920 | if (file) | |
921 | filp_close(file, (fl_owner_t)lo); | |
922 | nfs4_free_ol_stateid(stid); | |
923 | } | |
924 | ||
925 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) | |
926 | { | |
1c755dc1 JL |
927 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
928 | ||
929 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
3c87b9b7 | 930 | list_del(&stp->st_locks); |
529d7b2a | 931 | unhash_generic_stateid(stp); |
6136d2b4 | 932 | unhash_stid(&stp->st_stid); |
1c755dc1 | 933 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 934 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
935 | } |
936 | ||
fe0750e5 | 937 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 938 | { |
dcef0413 | 939 | struct nfs4_ol_stateid *stp; |
529d7b2a | 940 | |
fe0750e5 | 941 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
942 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
943 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 944 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 945 | __release_lock_stateid(stp); |
529d7b2a BF |
946 | } |
947 | } | |
948 | ||
50cc6231 TM |
949 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
950 | { | |
951 | kfree(lo->lo_owner.so_owner.data); | |
952 | kmem_cache_free(lockowner_slab, lo); | |
953 | } | |
954 | ||
fe0750e5 | 955 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 956 | { |
fe0750e5 BF |
957 | unhash_lockowner(lo); |
958 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
959 | } |
960 | ||
3c87b9b7 TM |
961 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
962 | { | |
963 | if (list_empty(&lo->lo_owner.so_stateids)) | |
964 | release_lockowner(lo); | |
965 | } | |
966 | ||
967 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 968 | { |
fe0750e5 | 969 | struct nfs4_lockowner *lo; |
529d7b2a | 970 | |
3c87b9b7 TM |
971 | lo = lockowner(stp->st_stateowner); |
972 | __release_lock_stateid(stp); | |
973 | release_lockowner_if_empty(lo); | |
974 | } | |
975 | ||
976 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
1c755dc1 JL |
977 | __releases(&open_stp->st_stateowner->so_client->cl_lock) |
978 | __acquires(&open_stp->st_stateowner->so_client->cl_lock) | |
3c87b9b7 TM |
979 | { |
980 | struct nfs4_ol_stateid *stp; | |
981 | ||
982 | while (!list_empty(&open_stp->st_locks)) { | |
983 | stp = list_entry(open_stp->st_locks.next, | |
984 | struct nfs4_ol_stateid, st_locks); | |
1c755dc1 | 985 | spin_unlock(&open_stp->st_stateowner->so_client->cl_lock); |
3c87b9b7 | 986 | release_lock_stateid(stp); |
1c755dc1 | 987 | spin_lock(&open_stp->st_stateowner->so_client->cl_lock); |
529d7b2a BF |
988 | } |
989 | } | |
990 | ||
38c387b5 | 991 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f | 992 | { |
1c755dc1 | 993 | spin_lock(&stp->st_stateowner->so_client->cl_lock); |
2283963f | 994 | unhash_generic_stateid(stp); |
3c87b9b7 | 995 | release_open_stateid_locks(stp); |
1c755dc1 | 996 | spin_unlock(&stp->st_stateowner->so_client->cl_lock); |
38c387b5 BF |
997 | } |
998 | ||
999 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1000 | { | |
1001 | unhash_open_stateid(stp); | |
6011695d | 1002 | nfs4_put_stid(&stp->st_stid); |
2283963f BF |
1003 | } |
1004 | ||
fe0750e5 | 1005 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1006 | { |
dcef0413 | 1007 | struct nfs4_ol_stateid *stp; |
f1d110ca | 1008 | |
fe0750e5 BF |
1009 | list_del(&oo->oo_owner.so_strhash); |
1010 | list_del(&oo->oo_perclient); | |
1011 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
1012 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 1013 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 1014 | release_open_stateid(stp); |
f1d110ca BF |
1015 | } |
1016 | } | |
1017 | ||
f7a4d872 BF |
1018 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1019 | { | |
1020 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1021 | ||
1022 | if (s) { | |
6011695d | 1023 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1024 | oo->oo_last_closed_stid = NULL; |
1025 | } | |
1026 | } | |
1027 | ||
50cc6231 TM |
1028 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
1029 | { | |
1030 | kfree(oo->oo_owner.so_owner.data); | |
1031 | kmem_cache_free(openowner_slab, oo); | |
1032 | } | |
1033 | ||
fe0750e5 | 1034 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1035 | { |
fe0750e5 BF |
1036 | unhash_openowner(oo); |
1037 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 1038 | release_last_closed_stateid(oo); |
fe0750e5 | 1039 | nfs4_free_openowner(oo); |
f1d110ca BF |
1040 | } |
1041 | ||
5282fd72 ME |
1042 | static inline int |
1043 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1044 | { | |
1045 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1046 | ||
1047 | return sid->sequence % SESSION_HASH_SIZE; | |
1048 | } | |
1049 | ||
8f199b82 | 1050 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1051 | static inline void |
1052 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1053 | { | |
1054 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1055 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1056 | } | |
8f199b82 TM |
1057 | #else |
1058 | static inline void | |
1059 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1060 | { | |
1061 | } | |
1062 | #endif | |
1063 | ||
9411b1d4 BF |
1064 | /* |
1065 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1066 | * won't be used for replay. | |
1067 | */ | |
1068 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1069 | { | |
1070 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1071 | ||
1072 | if (nfserr == nfserr_replay_me) | |
1073 | return; | |
1074 | ||
1075 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
1076 | cstate->replay_owner = NULL; | |
1077 | return; | |
1078 | } | |
1079 | if (!so) | |
1080 | return; | |
1081 | if (so->so_is_open_owner) | |
1082 | release_last_closed_stateid(openowner(so)); | |
1083 | so->so_seqid++; | |
1084 | return; | |
1085 | } | |
5282fd72 | 1086 | |
ec6b5d7b AA |
1087 | static void |
1088 | gen_sessionid(struct nfsd4_session *ses) | |
1089 | { | |
1090 | struct nfs4_client *clp = ses->se_client; | |
1091 | struct nfsd4_sessionid *sid; | |
1092 | ||
1093 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1094 | sid->clientid = clp->cl_clientid; | |
1095 | sid->sequence = current_sessionid++; | |
1096 | sid->reserved = 0; | |
1097 | } | |
1098 | ||
1099 | /* | |
a649637c AA |
1100 | * The protocol defines ca_maxresponssize_cached to include the size of |
1101 | * the rpc header, but all we need to cache is the data starting after | |
1102 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1103 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1104 | * value that is the number of bytes in our cache plus a few additional | |
1105 | * bytes. In order to stay on the safe side, and not promise more than | |
1106 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1107 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1108 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1109 | * for the SEQUENCE op response: | |
1110 | */ | |
1111 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1112 | ||
557ce264 AA |
1113 | static void |
1114 | free_session_slots(struct nfsd4_session *ses) | |
1115 | { | |
1116 | int i; | |
1117 | ||
1118 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1119 | kfree(ses->se_slots[i]); | |
1120 | } | |
1121 | ||
a649637c | 1122 | /* |
efe0cb6d BF |
1123 | * We don't actually need to cache the rpc and session headers, so we |
1124 | * can allocate a little less for each slot: | |
1125 | */ | |
55c760cf | 1126 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1127 | { |
55c760cf | 1128 | u32 size; |
efe0cb6d | 1129 | |
55c760cf BF |
1130 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1131 | size = 0; | |
1132 | else | |
1133 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1134 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1135 | } |
ec6b5d7b | 1136 | |
5b6feee9 BF |
1137 | /* |
1138 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1139 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1140 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1141 | */ |
55c760cf | 1142 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1143 | { |
55c760cf BF |
1144 | u32 slotsize = slot_bytes(ca); |
1145 | u32 num = ca->maxreqs; | |
5b6feee9 | 1146 | int avail; |
ec6b5d7b | 1147 | |
5b6feee9 | 1148 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1149 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1150 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1151 | num = min_t(int, num, avail / slotsize); |
1152 | nfsd_drc_mem_used += num * slotsize; | |
1153 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1154 | |
5b6feee9 BF |
1155 | return num; |
1156 | } | |
ec6b5d7b | 1157 | |
55c760cf | 1158 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1159 | { |
55c760cf BF |
1160 | int slotsize = slot_bytes(ca); |
1161 | ||
4bd9b0f4 | 1162 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1163 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1164 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1165 | } |
ec6b5d7b | 1166 | |
60810e54 KM |
1167 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1168 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1169 | { |
60810e54 KM |
1170 | int numslots = fattrs->maxreqs; |
1171 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1172 | struct nfsd4_session *new; |
1173 | int mem, i; | |
a649637c | 1174 | |
5b6feee9 BF |
1175 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1176 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1177 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1178 | |
5b6feee9 BF |
1179 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1180 | if (!new) | |
1181 | return NULL; | |
557ce264 | 1182 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1183 | for (i = 0; i < numslots; i++) { |
55c760cf | 1184 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1185 | if (!new->se_slots[i]) |
557ce264 | 1186 | goto out_free; |
557ce264 | 1187 | } |
60810e54 KM |
1188 | |
1189 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1190 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1191 | ||
5b6feee9 BF |
1192 | return new; |
1193 | out_free: | |
1194 | while (i--) | |
1195 | kfree(new->se_slots[i]); | |
1196 | kfree(new); | |
1197 | return NULL; | |
ec6b5d7b AA |
1198 | } |
1199 | ||
19cf5c02 BF |
1200 | static void free_conn(struct nfsd4_conn *c) |
1201 | { | |
1202 | svc_xprt_put(c->cn_xprt); | |
1203 | kfree(c); | |
1204 | } | |
ec6b5d7b | 1205 | |
19cf5c02 BF |
1206 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1207 | { | |
1208 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1209 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1210 | |
19cf5c02 BF |
1211 | spin_lock(&clp->cl_lock); |
1212 | if (!list_empty(&c->cn_persession)) { | |
1213 | list_del(&c->cn_persession); | |
1214 | free_conn(c); | |
1215 | } | |
eea49806 | 1216 | nfsd4_probe_callback(clp); |
2e4b7239 | 1217 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1218 | } |
ec6b5d7b | 1219 | |
d29c374c | 1220 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1221 | { |
c7662518 | 1222 | struct nfsd4_conn *conn; |
ec6b5d7b | 1223 | |
c7662518 BF |
1224 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1225 | if (!conn) | |
db90681d | 1226 | return NULL; |
c7662518 BF |
1227 | svc_xprt_get(rqstp->rq_xprt); |
1228 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1229 | conn->cn_flags = flags; |
db90681d BF |
1230 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1231 | return conn; | |
1232 | } | |
a649637c | 1233 | |
328ead28 BF |
1234 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1235 | { | |
1236 | conn->cn_session = ses; | |
1237 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1238 | } |
1239 | ||
db90681d | 1240 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1241 | { |
db90681d | 1242 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1243 | |
c7662518 | 1244 | spin_lock(&clp->cl_lock); |
328ead28 | 1245 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1246 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1247 | } |
1248 | ||
21b75b01 | 1249 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1250 | { |
19cf5c02 | 1251 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1252 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1253 | } |
1254 | ||
e1ff371f | 1255 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1256 | { |
21b75b01 | 1257 | int ret; |
ec6b5d7b | 1258 | |
db90681d | 1259 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1260 | ret = nfsd4_register_conn(conn); |
1261 | if (ret) | |
1262 | /* oops; xprt is already down: */ | |
1263 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1264 | /* We may have gained or lost a callback channel: */ |
1265 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1266 | } |
ec6b5d7b | 1267 | |
e1ff371f | 1268 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1269 | { |
1270 | u32 dir = NFS4_CDFC4_FORE; | |
1271 | ||
e1ff371f | 1272 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1273 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1274 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1275 | } |
1276 | ||
1277 | /* must be called under client_lock */ | |
19cf5c02 | 1278 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1279 | { |
19cf5c02 BF |
1280 | struct nfs4_client *clp = s->se_client; |
1281 | struct nfsd4_conn *c; | |
ec6b5d7b | 1282 | |
19cf5c02 BF |
1283 | spin_lock(&clp->cl_lock); |
1284 | while (!list_empty(&s->se_conns)) { | |
1285 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1286 | list_del_init(&c->cn_persession); | |
1287 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1288 | |
19cf5c02 BF |
1289 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1290 | free_conn(c); | |
ec6b5d7b | 1291 | |
19cf5c02 BF |
1292 | spin_lock(&clp->cl_lock); |
1293 | } | |
1294 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1295 | } |
ec6b5d7b | 1296 | |
1377b69e BF |
1297 | static void __free_session(struct nfsd4_session *ses) |
1298 | { | |
1377b69e BF |
1299 | free_session_slots(ses); |
1300 | kfree(ses); | |
1301 | } | |
1302 | ||
66b2b9b2 | 1303 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1304 | { |
66b2b9b2 | 1305 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1306 | |
1307 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1308 | nfsd4_del_conns(ses); |
55c760cf | 1309 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1310 | __free_session(ses); |
c7662518 BF |
1311 | } |
1312 | ||
135ae827 | 1313 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1314 | { |
a827bcb2 | 1315 | int idx; |
1872de0e | 1316 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1317 | |
ec6b5d7b AA |
1318 | new->se_client = clp; |
1319 | gen_sessionid(new); | |
ec6b5d7b | 1320 | |
c7662518 BF |
1321 | INIT_LIST_HEAD(&new->se_conns); |
1322 | ||
ac7c46f2 | 1323 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1324 | new->se_flags = cses->flags; |
8b5ce5cd | 1325 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1326 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1327 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1328 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1329 | spin_lock(&nn->client_lock); |
1872de0e | 1330 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1331 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1332 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1333 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1334 | spin_unlock(&nn->client_lock); |
60810e54 | 1335 | |
dcbeaa68 | 1336 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1337 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1338 | /* |
1339 | * This is a little silly; with sessions there's no real | |
1340 | * use for the callback address. Use the peer address | |
1341 | * as a reasonable default for now, but consider fixing | |
1342 | * the rpc client not to require an address in the | |
1343 | * future: | |
1344 | */ | |
edd76786 BF |
1345 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1346 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1347 | } |
ec6b5d7b AA |
1348 | } |
1349 | ||
9089f1b4 | 1350 | /* caller must hold client_lock */ |
5282fd72 | 1351 | static struct nfsd4_session * |
d4e19e70 | 1352 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1353 | { |
1354 | struct nfsd4_session *elem; | |
1355 | int idx; | |
1872de0e | 1356 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1357 | |
1358 | dump_sessionid(__func__, sessionid); | |
1359 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1360 | /* Search in the appropriate list */ |
1872de0e | 1361 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1362 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1363 | NFS4_MAX_SESSIONID_LEN)) { | |
1364 | return elem; | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | dprintk("%s: session not found\n", __func__); | |
1369 | return NULL; | |
1370 | } | |
1371 | ||
d4e19e70 TM |
1372 | static struct nfsd4_session * |
1373 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1374 | __be32 *ret) | |
1375 | { | |
1376 | struct nfsd4_session *session; | |
1377 | __be32 status = nfserr_badsession; | |
1378 | ||
1379 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1380 | if (!session) | |
1381 | goto out; | |
1382 | status = nfsd4_get_session_locked(session); | |
1383 | if (status) | |
1384 | session = NULL; | |
1385 | out: | |
1386 | *ret = status; | |
1387 | return session; | |
1388 | } | |
1389 | ||
9089f1b4 | 1390 | /* caller must hold client_lock */ |
7116ed6b | 1391 | static void |
5282fd72 | 1392 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1393 | { |
1394 | list_del(&ses->se_hash); | |
4c649378 | 1395 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1396 | list_del(&ses->se_perclnt); |
4c649378 | 1397 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1398 | } |
1399 | ||
1da177e4 LT |
1400 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1401 | static int | |
2c142baa | 1402 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1403 | { |
2c142baa | 1404 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1405 | return 0; |
60adfc50 | 1406 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1407 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1408 | return 1; |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * XXX Should we use a slab cache ? | |
1413 | * This type of memory management is somewhat inefficient, but we use it | |
1414 | * anyway since SETCLIENTID is not a common operation. | |
1415 | */ | |
35bba9a3 | 1416 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1417 | { |
1418 | struct nfs4_client *clp; | |
1419 | ||
35bba9a3 BF |
1420 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1421 | if (clp == NULL) | |
1422 | return NULL; | |
67114fe6 | 1423 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1424 | if (clp->cl_name.data == NULL) { |
1425 | kfree(clp); | |
1426 | return NULL; | |
1da177e4 | 1427 | } |
35bba9a3 | 1428 | clp->cl_name.len = name.len; |
5694c93e TM |
1429 | INIT_LIST_HEAD(&clp->cl_sessions); |
1430 | idr_init(&clp->cl_stateids); | |
1431 | atomic_set(&clp->cl_refcount, 0); | |
1432 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1433 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1434 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1435 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1436 | INIT_LIST_HEAD(&clp->cl_lru); | |
1437 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1438 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1439 | spin_lock_init(&clp->cl_lock); | |
1440 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1441 | return clp; |
1442 | } | |
1443 | ||
4dd86e15 | 1444 | static void |
1da177e4 LT |
1445 | free_client(struct nfs4_client *clp) |
1446 | { | |
bca0ec65 | 1447 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1448 | |
1449 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1450 | while (!list_empty(&clp->cl_sessions)) { |
1451 | struct nfsd4_session *ses; | |
1452 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1453 | se_perclnt); | |
1454 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1455 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1456 | free_session(ses); | |
792c95dd | 1457 | } |
4cb57e30 | 1458 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1459 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1460 | kfree(clp->cl_name.data); |
2d32b29a | 1461 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1462 | kfree(clp); |
1463 | } | |
1464 | ||
84d38ac9 BH |
1465 | /* must be called under the client_lock */ |
1466 | static inline void | |
1467 | unhash_client_locked(struct nfs4_client *clp) | |
1468 | { | |
792c95dd BF |
1469 | struct nfsd4_session *ses; |
1470 | ||
84d38ac9 | 1471 | list_del(&clp->cl_lru); |
4c649378 | 1472 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1473 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1474 | list_del_init(&ses->se_hash); | |
4c649378 | 1475 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1476 | } |
1477 | ||
1da177e4 | 1478 | static void |
0d22f68f | 1479 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1480 | { |
fe0750e5 | 1481 | struct nfs4_openowner *oo; |
1da177e4 | 1482 | struct nfs4_delegation *dp; |
1da177e4 | 1483 | struct list_head reaplist; |
382a62e7 | 1484 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1485 | |
1da177e4 | 1486 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1487 | spin_lock(&state_lock); |
ea1da636 N |
1488 | while (!list_empty(&clp->cl_delegations)) { |
1489 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1490 | unhash_delegation_locked(dp); |
1491 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1492 | } |
cdc97505 | 1493 | spin_unlock(&state_lock); |
1da177e4 LT |
1494 | while (!list_empty(&reaplist)) { |
1495 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1496 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1497 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1498 | } |
2d4a532d | 1499 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1500 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1501 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1502 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1503 | } |
ea1da636 | 1504 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1505 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1506 | release_openowner(oo); | |
1da177e4 | 1507 | } |
6ff8da08 | 1508 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1509 | if (clp->cl_cb_conn.cb_xprt) |
1510 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1511 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1512 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1513 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1514 | else |
a99454aa | 1515 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1516 | spin_lock(&nn->client_lock); |
84d38ac9 | 1517 | unhash_client_locked(clp); |
221a6876 BF |
1518 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1519 | free_client(clp); | |
c9a49628 | 1520 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1521 | } |
1522 | ||
0d22f68f BF |
1523 | static void expire_client(struct nfs4_client *clp) |
1524 | { | |
1525 | nfsd4_client_record_remove(clp); | |
1526 | destroy_client(clp); | |
1527 | } | |
1528 | ||
35bba9a3 BF |
1529 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1530 | { | |
1531 | memcpy(target->cl_verifier.data, source->data, | |
1532 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1533 | } |
1534 | ||
35bba9a3 BF |
1535 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1536 | { | |
1da177e4 LT |
1537 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1538 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1539 | } | |
1540 | ||
03a4e1f6 | 1541 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1542 | { |
03a4e1f6 BF |
1543 | if (source->cr_principal) { |
1544 | target->cr_principal = | |
1545 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1546 | if (target->cr_principal == NULL) | |
1547 | return -ENOMEM; | |
1548 | } else | |
1549 | target->cr_principal = NULL; | |
d5497fc6 | 1550 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1551 | target->cr_uid = source->cr_uid; |
1552 | target->cr_gid = source->cr_gid; | |
1553 | target->cr_group_info = source->cr_group_info; | |
1554 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1555 | target->cr_gss_mech = source->cr_gss_mech; |
1556 | if (source->cr_gss_mech) | |
1557 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1558 | return 0; |
1da177e4 LT |
1559 | } |
1560 | ||
ac55fdc4 JL |
1561 | static long long |
1562 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1563 | { | |
1564 | long long res; | |
1565 | ||
1566 | res = o1->len - o2->len; | |
1567 | if (res) | |
1568 | return res; | |
1569 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1570 | } | |
1571 | ||
35bba9a3 | 1572 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1573 | { |
a55370a3 | 1574 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1575 | } |
1576 | ||
1577 | static int | |
599e0a22 BF |
1578 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1579 | { | |
1580 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | static int | |
599e0a22 BF |
1584 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1585 | { | |
1586 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1587 | } |
1588 | ||
8fbba96e BF |
1589 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1590 | { | |
1591 | int i; | |
1592 | ||
1593 | if (g1->ngroups != g2->ngroups) | |
1594 | return false; | |
1595 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1596 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1597 | return false; |
1598 | return true; | |
1599 | } | |
1600 | ||
68eb3508 BF |
1601 | /* |
1602 | * RFC 3530 language requires clid_inuse be returned when the | |
1603 | * "principal" associated with a requests differs from that previously | |
1604 | * used. We use uid, gid's, and gss principal string as our best | |
1605 | * approximation. We also don't want to allow non-gss use of a client | |
1606 | * established using gss: in theory cr_principal should catch that | |
1607 | * change, but in practice cr_principal can be null even in the gss case | |
1608 | * since gssd doesn't always pass down a principal string. | |
1609 | */ | |
1610 | static bool is_gss_cred(struct svc_cred *cr) | |
1611 | { | |
1612 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1613 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1614 | } | |
1615 | ||
1616 | ||
5559b50a | 1617 | static bool |
599e0a22 BF |
1618 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1619 | { | |
68eb3508 | 1620 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1621 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1622 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1623 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1624 | return false; | |
1625 | if (cr1->cr_principal == cr2->cr_principal) | |
1626 | return true; | |
1627 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1628 | return false; | |
5559b50a | 1629 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1630 | } |
1631 | ||
57266a6e BF |
1632 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1633 | { | |
1634 | struct svc_cred *cr = &rqstp->rq_cred; | |
1635 | u32 service; | |
1636 | ||
c4720591 BF |
1637 | if (!cr->cr_gss_mech) |
1638 | return false; | |
57266a6e BF |
1639 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1640 | return service == RPC_GSS_SVC_INTEGRITY || | |
1641 | service == RPC_GSS_SVC_PRIVACY; | |
1642 | } | |
1643 | ||
1644 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1645 | { | |
1646 | struct svc_cred *cr = &rqstp->rq_cred; | |
1647 | ||
1648 | if (!cl->cl_mach_cred) | |
1649 | return true; | |
1650 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1651 | return false; | |
1652 | if (!svc_rqst_integrity_protected(rqstp)) | |
1653 | return false; | |
1654 | if (!cr->cr_principal) | |
1655 | return false; | |
1656 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1657 | } | |
1658 | ||
c212cecf | 1659 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1660 | { |
1661 | static u32 current_clientid = 1; | |
1662 | ||
2c142baa | 1663 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1664 | clp->cl_clientid.cl_id = current_clientid++; |
1665 | } | |
1666 | ||
deda2faa BF |
1667 | static void gen_confirm(struct nfs4_client *clp) |
1668 | { | |
ab4684d1 | 1669 | __be32 verf[2]; |
deda2faa | 1670 | static u32 i; |
1da177e4 | 1671 | |
f419992c JL |
1672 | /* |
1673 | * This is opaque to client, so no need to byte-swap. Use | |
1674 | * __force to keep sparse happy | |
1675 | */ | |
1676 | verf[0] = (__force __be32)get_seconds(); | |
1677 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1678 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1679 | } |
1680 | ||
4770d722 JL |
1681 | static struct nfs4_stid * |
1682 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1683 | { |
3abdb607 BF |
1684 | struct nfs4_stid *ret; |
1685 | ||
1686 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1687 | if (!ret || !ret->sc_type) | |
1688 | return NULL; | |
1689 | return ret; | |
4d71ab87 BF |
1690 | } |
1691 | ||
4770d722 JL |
1692 | static struct nfs4_stid * |
1693 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1694 | { |
1695 | struct nfs4_stid *s; | |
4d71ab87 | 1696 | |
4770d722 JL |
1697 | spin_lock(&cl->cl_lock); |
1698 | s = find_stateid_locked(cl, t); | |
1699 | if (s != NULL && !(typemask & s->sc_type)) | |
1700 | s = NULL; | |
1701 | spin_unlock(&cl->cl_lock); | |
1702 | return s; | |
4581d140 BF |
1703 | } |
1704 | ||
2216d449 | 1705 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1706 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1707 | { | |
1708 | struct nfs4_client *clp; | |
1709 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1710 | int ret; |
c212cecf | 1711 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1712 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1713 | |
1714 | clp = alloc_client(name); | |
1715 | if (clp == NULL) | |
1716 | return NULL; | |
1717 | ||
03a4e1f6 BF |
1718 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1719 | if (ret) { | |
c9a49628 | 1720 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1721 | free_client(clp); |
c9a49628 | 1722 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1723 | return NULL; |
b09333c4 | 1724 | } |
02e1215f | 1725 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); |
07cd4909 | 1726 | clp->cl_time = get_seconds(); |
b09333c4 | 1727 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1728 | copy_verf(clp, verf); |
1729 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1730 | gen_confirm(clp); |
edd76786 | 1731 | clp->cl_cb_session = NULL; |
c212cecf | 1732 | clp->net = net; |
b09333c4 RL |
1733 | return clp; |
1734 | } | |
1735 | ||
fd39ca9a | 1736 | static void |
ac55fdc4 JL |
1737 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1738 | { | |
1739 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1740 | struct nfs4_client *clp; | |
1741 | ||
1742 | while (*new) { | |
1743 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1744 | parent = *new; | |
1745 | ||
1746 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1747 | new = &((*new)->rb_left); | |
1748 | else | |
1749 | new = &((*new)->rb_right); | |
1750 | } | |
1751 | ||
1752 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1753 | rb_insert_color(&new_clp->cl_namenode, root); | |
1754 | } | |
1755 | ||
1756 | static struct nfs4_client * | |
1757 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1758 | { | |
1759 | long long cmp; | |
1760 | struct rb_node *node = root->rb_node; | |
1761 | struct nfs4_client *clp; | |
1762 | ||
1763 | while (node) { | |
1764 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1765 | cmp = compare_blob(&clp->cl_name, name); | |
1766 | if (cmp > 0) | |
1767 | node = node->rb_left; | |
1768 | else if (cmp < 0) | |
1769 | node = node->rb_right; | |
1770 | else | |
1771 | return clp; | |
1772 | } | |
1773 | return NULL; | |
1774 | } | |
1775 | ||
1776 | static void | |
1777 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1778 | { |
1779 | unsigned int idhashval; | |
0a7ec377 | 1780 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1781 | |
ac55fdc4 | 1782 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1783 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1784 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1785 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1786 | renew_client(clp); |
1da177e4 LT |
1787 | } |
1788 | ||
fd39ca9a | 1789 | static void |
1da177e4 LT |
1790 | move_to_confirmed(struct nfs4_client *clp) |
1791 | { | |
1792 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1793 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1794 | |
1795 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1796 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1797 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1798 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1799 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1800 | renew_client(clp); |
1801 | } | |
1802 | ||
1803 | static struct nfs4_client * | |
bfa85e83 | 1804 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1805 | { |
1806 | struct nfs4_client *clp; | |
1807 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1808 | ||
bfa85e83 | 1809 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1810 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1811 | if ((bool)clp->cl_minorversion != sessions) |
1812 | return NULL; | |
a50d2ad1 | 1813 | renew_client(clp); |
1da177e4 | 1814 | return clp; |
a50d2ad1 | 1815 | } |
1da177e4 LT |
1816 | } |
1817 | return NULL; | |
1818 | } | |
1819 | ||
bfa85e83 BF |
1820 | static struct nfs4_client * |
1821 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1822 | { | |
1823 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1824 | ||
1825 | return find_client_in_id_table(tbl, clid, sessions); | |
1826 | } | |
1827 | ||
1da177e4 | 1828 | static struct nfs4_client * |
0a7ec377 | 1829 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1830 | { |
bfa85e83 | 1831 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1832 | |
bfa85e83 | 1833 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1834 | } |
1835 | ||
6e5f15c9 | 1836 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1837 | { |
6e5f15c9 | 1838 | return clp->cl_exchange_flags != 0; |
e203d506 | 1839 | } |
a1bcecd2 | 1840 | |
28ce6054 | 1841 | static struct nfs4_client * |
382a62e7 | 1842 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1843 | { |
382a62e7 | 1844 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1845 | } |
1846 | ||
1847 | static struct nfs4_client * | |
a99454aa | 1848 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1849 | { |
a99454aa | 1850 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1851 | } |
1852 | ||
fd39ca9a | 1853 | static void |
6f3d772f | 1854 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1855 | { |
07263f1e | 1856 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1857 | struct sockaddr *sa = svc_addr(rqstp); |
1858 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1859 | unsigned short expected_family; |
1860 | ||
1861 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1862 | if (se->se_callback_netid_len == 3 && | |
1863 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1864 | expected_family = AF_INET; | |
1865 | else if (se->se_callback_netid_len == 4 && | |
1866 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1867 | expected_family = AF_INET6; | |
1868 | else | |
1da177e4 LT |
1869 | goto out_err; |
1870 | ||
c212cecf | 1871 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1872 | se->se_callback_addr_len, |
07263f1e BF |
1873 | (struct sockaddr *)&conn->cb_addr, |
1874 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1875 | |
07263f1e | 1876 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1877 | goto out_err; |
aa9a4ec7 | 1878 | |
07263f1e BF |
1879 | if (conn->cb_addr.ss_family == AF_INET6) |
1880 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1881 | |
07263f1e BF |
1882 | conn->cb_prog = se->se_callback_prog; |
1883 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1884 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1885 | return; |
1886 | out_err: | |
07263f1e BF |
1887 | conn->cb_addr.ss_family = AF_UNSPEC; |
1888 | conn->cb_addrlen = 0; | |
849823c5 | 1889 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1890 | "will not receive delegations\n", |
1891 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1892 | ||
1da177e4 LT |
1893 | return; |
1894 | } | |
1895 | ||
074fe897 | 1896 | /* |
067e1ace | 1897 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1898 | */ |
b607664e | 1899 | static void |
074fe897 | 1900 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1901 | { |
f5236013 | 1902 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1903 | struct nfsd4_slot *slot = resp->cstate.slot; |
1904 | unsigned int base; | |
074fe897 | 1905 | |
557ce264 | 1906 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1907 | |
557ce264 AA |
1908 | slot->sl_opcnt = resp->opcnt; |
1909 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1910 | |
bf5c43c8 | 1911 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1912 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1913 | slot->sl_datalen = 0; |
bf864a31 | 1914 | return; |
074fe897 | 1915 | } |
f5236013 BF |
1916 | base = resp->cstate.data_offset; |
1917 | slot->sl_datalen = buf->len - base; | |
1918 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1919 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1920 | return; | |
074fe897 AA |
1921 | } |
1922 | ||
1923 | /* | |
abfabf8c AA |
1924 | * Encode the replay sequence operation from the slot values. |
1925 | * If cachethis is FALSE encode the uncached rep error on the next | |
1926 | * operation which sets resp->p and increments resp->opcnt for | |
1927 | * nfs4svc_encode_compoundres. | |
074fe897 | 1928 | * |
074fe897 | 1929 | */ |
abfabf8c AA |
1930 | static __be32 |
1931 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1932 | struct nfsd4_compoundres *resp) | |
074fe897 | 1933 | { |
abfabf8c AA |
1934 | struct nfsd4_op *op; |
1935 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1936 | |
abfabf8c AA |
1937 | /* Encode the replayed sequence operation */ |
1938 | op = &args->ops[resp->opcnt - 1]; | |
1939 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1940 | |
abfabf8c | 1941 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1942 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1943 | op = &args->ops[resp->opcnt++]; |
1944 | op->status = nfserr_retry_uncached_rep; | |
1945 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1946 | } |
abfabf8c | 1947 | return op->status; |
074fe897 AA |
1948 | } |
1949 | ||
1950 | /* | |
557ce264 AA |
1951 | * The sequence operation is not cached because we can use the slot and |
1952 | * session values. | |
074fe897 | 1953 | */ |
3ca2eb98 | 1954 | static __be32 |
bf864a31 AA |
1955 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1956 | struct nfsd4_sequence *seq) | |
074fe897 | 1957 | { |
557ce264 | 1958 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1959 | struct xdr_stream *xdr = &resp->xdr; |
1960 | __be32 *p; | |
074fe897 AA |
1961 | __be32 status; |
1962 | ||
557ce264 | 1963 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1964 | |
abfabf8c | 1965 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1966 | if (status) |
abfabf8c | 1967 | return status; |
074fe897 | 1968 | |
f5236013 BF |
1969 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1970 | if (!p) { | |
1971 | WARN_ON_ONCE(1); | |
1972 | return nfserr_serverfault; | |
1973 | } | |
1974 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1975 | xdr_commit_encode(xdr); | |
074fe897 | 1976 | |
557ce264 | 1977 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1978 | return slot->sl_status; |
074fe897 AA |
1979 | } |
1980 | ||
0733d213 AA |
1981 | /* |
1982 | * Set the exchange_id flags returned by the server. | |
1983 | */ | |
1984 | static void | |
1985 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1986 | { | |
1987 | /* pNFS is not supported */ | |
1988 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1989 | ||
1990 | /* Referrals are supported, Migration is not. */ | |
1991 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1992 | ||
1993 | /* set the wire flags to return to client. */ | |
1994 | clid->flags = new->cl_exchange_flags; | |
1995 | } | |
1996 | ||
631fc9ea BF |
1997 | static bool client_has_state(struct nfs4_client *clp) |
1998 | { | |
1999 | /* | |
2000 | * Note clp->cl_openowners check isn't quite right: there's no | |
2001 | * need to count owners without stateid's. | |
2002 | * | |
2003 | * Also note we should probably be using this in 4.0 case too. | |
2004 | */ | |
6eccece9 BF |
2005 | return !list_empty(&clp->cl_openowners) |
2006 | || !list_empty(&clp->cl_delegations) | |
2007 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
2008 | } |
2009 | ||
069b6ad4 AA |
2010 | __be32 |
2011 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
2012 | struct nfsd4_compound_state *cstate, | |
2013 | struct nfsd4_exchange_id *exid) | |
2014 | { | |
0733d213 | 2015 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 2016 | __be32 status; |
363168b4 | 2017 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 2018 | nfs4_verifier verf = exid->verifier; |
363168b4 | 2019 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 2020 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 2021 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 2022 | |
363168b4 | 2023 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 2024 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 2025 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 2026 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 2027 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 2028 | |
a084daf5 | 2029 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
2030 | return nfserr_inval; |
2031 | ||
0733d213 | 2032 | switch (exid->spa_how) { |
57266a6e BF |
2033 | case SP4_MACH_CRED: |
2034 | if (!svc_rqst_integrity_protected(rqstp)) | |
2035 | return nfserr_inval; | |
0733d213 AA |
2036 | case SP4_NONE: |
2037 | break; | |
063b0fb9 BF |
2038 | default: /* checked by xdr code */ |
2039 | WARN_ON_ONCE(1); | |
0733d213 | 2040 | case SP4_SSV: |
dd30333c | 2041 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
2042 | } |
2043 | ||
2dbb269d | 2044 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 2045 | nfs4_lock_state(); |
382a62e7 | 2046 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 2047 | if (conf) { |
83e08fd4 BF |
2048 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
2049 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
2050 | ||
136e658d BF |
2051 | if (update) { |
2052 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 2053 | status = nfserr_inval; |
1a308118 BF |
2054 | goto out; |
2055 | } | |
57266a6e BF |
2056 | if (!mach_creds_match(conf, rqstp)) { |
2057 | status = nfserr_wrong_cred; | |
2058 | goto out; | |
2059 | } | |
136e658d | 2060 | if (!creds_match) { /* case 9 */ |
ea236d07 | 2061 | status = nfserr_perm; |
136e658d BF |
2062 | goto out; |
2063 | } | |
2064 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
2065 | status = nfserr_not_same; |
2066 | goto out; | |
2067 | } | |
136e658d BF |
2068 | /* case 6 */ |
2069 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
2070 | new = conf; | |
2071 | goto out_copy; | |
0733d213 | 2072 | } |
136e658d | 2073 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
2074 | if (client_has_state(conf)) { |
2075 | status = nfserr_clid_inuse; | |
0733d213 AA |
2076 | goto out; |
2077 | } | |
2078 | expire_client(conf); | |
2079 | goto out_new; | |
2080 | } | |
136e658d | 2081 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 2082 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
2083 | new = conf; |
2084 | goto out_copy; | |
2085 | } | |
2086 | /* case 5, client reboot */ | |
136e658d | 2087 | goto out_new; |
6ddbbbfe MS |
2088 | } |
2089 | ||
2dbb269d | 2090 | if (update) { /* case 7 */ |
6ddbbbfe MS |
2091 | status = nfserr_noent; |
2092 | goto out; | |
0733d213 AA |
2093 | } |
2094 | ||
a99454aa | 2095 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 2096 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 2097 | expire_client(unconf); |
0733d213 | 2098 | |
2dbb269d | 2099 | /* case 1 (normal case) */ |
0733d213 | 2100 | out_new: |
2216d449 | 2101 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2102 | if (new == NULL) { |
4731030d | 2103 | status = nfserr_jukebox; |
0733d213 AA |
2104 | goto out; |
2105 | } | |
4f540e29 | 2106 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2107 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2108 | |
c212cecf | 2109 | gen_clid(new, nn); |
ac55fdc4 | 2110 | add_to_unconfirmed(new); |
0733d213 AA |
2111 | out_copy: |
2112 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2113 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2114 | ||
778df3f0 | 2115 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2116 | nfsd4_set_ex_flags(new, exid); |
2117 | ||
2118 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2119 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2120 | status = nfs_ok; |
2121 | ||
2122 | out: | |
2123 | nfs4_unlock_state(); | |
0733d213 | 2124 | return status; |
069b6ad4 AA |
2125 | } |
2126 | ||
57b7b43b | 2127 | static __be32 |
88e588d5 | 2128 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2129 | { |
88e588d5 AA |
2130 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2131 | slot_seqid); | |
b85d4c01 BH |
2132 | |
2133 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2134 | if (slot_inuse) { |
2135 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2136 | return nfserr_jukebox; |
2137 | else | |
2138 | return nfserr_seq_misordered; | |
2139 | } | |
f6d82485 | 2140 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2141 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2142 | return nfs_ok; |
88e588d5 | 2143 | if (seqid == slot_seqid) |
b85d4c01 | 2144 | return nfserr_replay_cache; |
b85d4c01 BH |
2145 | return nfserr_seq_misordered; |
2146 | } | |
2147 | ||
49557cc7 AA |
2148 | /* |
2149 | * Cache the create session result into the create session single DRC | |
2150 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2151 | * Do this for solo or embedded create session operations. | |
2152 | */ | |
2153 | static void | |
2154 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2155 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2156 | { |
2157 | slot->sl_status = nfserr; | |
2158 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2159 | } | |
2160 | ||
2161 | static __be32 | |
2162 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2163 | struct nfsd4_clid_slot *slot) | |
2164 | { | |
2165 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2166 | return slot->sl_status; | |
2167 | } | |
2168 | ||
1b74c25b MJ |
2169 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2170 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2171 | 1 + /* MIN tag is length with zero, only length */ \ | |
2172 | 3 + /* version, opcount, opcode */ \ | |
2173 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2174 | /* seqid, slotID, slotID, cache */ \ | |
2175 | 4 ) * sizeof(__be32)) | |
2176 | ||
2177 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2178 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2179 | 1 + /* status */ \ | |
2180 | 1 + /* MIN tag is length with zero, only length */ \ | |
2181 | 3 + /* opcount, opcode, opstatus*/ \ | |
2182 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2183 | /* seqid, slotID, slotID, slotID, status */ \ | |
2184 | 5 ) * sizeof(__be32)) | |
2185 | ||
55c760cf | 2186 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2187 | { |
55c760cf BF |
2188 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2189 | ||
373cd409 BF |
2190 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2191 | return nfserr_toosmall; | |
2192 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2193 | return nfserr_toosmall; | |
55c760cf BF |
2194 | ca->headerpadsz = 0; |
2195 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2196 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2197 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2198 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2199 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2200 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2201 | /* | |
2202 | * Note decreasing slot size below client's request may make it | |
2203 | * difficult for client to function correctly, whereas | |
2204 | * decreasing the number of slots will (just?) affect | |
2205 | * performance. When short on memory we therefore prefer to | |
2206 | * decrease number of slots instead of their size. Clients that | |
2207 | * request larger slots than they need will get poor results: | |
2208 | */ | |
2209 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2210 | if (!ca->maxreqs) | |
2211 | return nfserr_jukebox; | |
2212 | ||
373cd409 | 2213 | return nfs_ok; |
1b74c25b MJ |
2214 | } |
2215 | ||
8a891633 KM |
2216 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2217 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2218 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2219 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2220 | ||
06b332a5 | 2221 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2222 | { |
06b332a5 BF |
2223 | ca->headerpadsz = 0; |
2224 | ||
2225 | /* | |
2226 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2227 | * don't even do gss on the backchannel yet. But this is still | |
2228 | * less than 1k. Tighten up this estimate in the unlikely event | |
2229 | * it turns out to be a problem for some client: | |
2230 | */ | |
8a891633 | 2231 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2232 | return nfserr_toosmall; |
8a891633 | 2233 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2234 | return nfserr_toosmall; |
2235 | ca->maxresp_cached = 0; | |
2236 | if (ca->maxops < 2) | |
2237 | return nfserr_toosmall; | |
2238 | ||
2239 | return nfs_ok; | |
1b74c25b MJ |
2240 | } |
2241 | ||
b78724b7 BF |
2242 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2243 | { | |
2244 | switch (cbs->flavor) { | |
2245 | case RPC_AUTH_NULL: | |
2246 | case RPC_AUTH_UNIX: | |
2247 | return nfs_ok; | |
2248 | default: | |
2249 | /* | |
2250 | * GSS case: the spec doesn't allow us to return this | |
2251 | * error. But it also doesn't allow us not to support | |
2252 | * GSS. | |
2253 | * I'd rather this fail hard than return some error the | |
2254 | * client might think it can already handle: | |
2255 | */ | |
2256 | return nfserr_encr_alg_unsupp; | |
2257 | } | |
2258 | } | |
2259 | ||
069b6ad4 AA |
2260 | __be32 |
2261 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2262 | struct nfsd4_compound_state *cstate, | |
2263 | struct nfsd4_create_session *cr_ses) | |
2264 | { | |
363168b4 | 2265 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2266 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2267 | struct nfsd4_session *new; |
81f0b2a4 | 2268 | struct nfsd4_conn *conn; |
49557cc7 | 2269 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2270 | __be32 status = 0; |
8daae4dc | 2271 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2272 | |
a62573dc MJ |
2273 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2274 | return nfserr_inval; | |
b78724b7 BF |
2275 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2276 | if (status) | |
2277 | return status; | |
55c760cf | 2278 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2279 | if (status) |
2280 | return status; | |
2281 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2282 | if (status) |
f403e450 | 2283 | goto out_release_drc_mem; |
81f0b2a4 | 2284 | status = nfserr_jukebox; |
60810e54 | 2285 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2286 | if (!new) |
2287 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2288 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2289 | if (!conn) | |
2290 | goto out_free_session; | |
a62573dc | 2291 | |
ec6b5d7b | 2292 | nfs4_lock_state(); |
0a7ec377 | 2293 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2294 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2295 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2296 | |
2297 | if (conf) { | |
57266a6e BF |
2298 | status = nfserr_wrong_cred; |
2299 | if (!mach_creds_match(conf, rqstp)) | |
2300 | goto out_free_conn; | |
49557cc7 AA |
2301 | cs_slot = &conf->cl_cs_slot; |
2302 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2303 | if (status == nfserr_replay_cache) { |
49557cc7 | 2304 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2305 | goto out_free_conn; |
49557cc7 | 2306 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2307 | status = nfserr_seq_misordered; |
81f0b2a4 | 2308 | goto out_free_conn; |
ec6b5d7b | 2309 | } |
ec6b5d7b | 2310 | } else if (unconf) { |
8f9d3d3b | 2311 | struct nfs4_client *old; |
ec6b5d7b | 2312 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2313 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2314 | status = nfserr_clid_inuse; |
81f0b2a4 | 2315 | goto out_free_conn; |
ec6b5d7b | 2316 | } |
57266a6e BF |
2317 | status = nfserr_wrong_cred; |
2318 | if (!mach_creds_match(unconf, rqstp)) | |
2319 | goto out_free_conn; | |
49557cc7 AA |
2320 | cs_slot = &unconf->cl_cs_slot; |
2321 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2322 | if (status) { |
2323 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2324 | status = nfserr_seq_misordered; |
81f0b2a4 | 2325 | goto out_free_conn; |
ec6b5d7b | 2326 | } |
382a62e7 | 2327 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2328 | if (old) { |
2329 | status = mark_client_expired(old); | |
2330 | if (status) | |
2331 | goto out_free_conn; | |
8f9d3d3b | 2332 | expire_client(old); |
221a6876 | 2333 | } |
8f9d3d3b | 2334 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2335 | conf = unconf; |
2336 | } else { | |
2337 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2338 | goto out_free_conn; |
ec6b5d7b | 2339 | } |
81f0b2a4 | 2340 | status = nfs_ok; |
408b79bc BF |
2341 | /* |
2342 | * We do not support RDMA or persistent sessions | |
2343 | */ | |
2344 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2345 | cr_ses->flags &= ~SESSION4_RDMA; | |
2346 | ||
81f0b2a4 BF |
2347 | init_session(rqstp, new, conf, cr_ses); |
2348 | nfsd4_init_conn(rqstp, conn, new); | |
2349 | ||
ac7c46f2 | 2350 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2351 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2352 | cs_slot->sl_seqid++; |
49557cc7 | 2353 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2354 | |
49557cc7 AA |
2355 | /* cache solo and embedded create sessions under the state lock */ |
2356 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2357 | nfs4_unlock_state(); |
ec6b5d7b | 2358 | return status; |
81f0b2a4 | 2359 | out_free_conn: |
266533c6 | 2360 | nfs4_unlock_state(); |
81f0b2a4 BF |
2361 | free_conn(conn); |
2362 | out_free_session: | |
2363 | __free_session(new); | |
55c760cf BF |
2364 | out_release_drc_mem: |
2365 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2366 | return status; |
069b6ad4 AA |
2367 | } |
2368 | ||
1d1bc8f2 BF |
2369 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2370 | { | |
2371 | switch (*dir) { | |
2372 | case NFS4_CDFC4_FORE: | |
2373 | case NFS4_CDFC4_BACK: | |
2374 | return nfs_ok; | |
2375 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2376 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2377 | *dir = NFS4_CDFC4_BOTH; | |
2378 | return nfs_ok; | |
2379 | }; | |
2380 | return nfserr_inval; | |
2381 | } | |
2382 | ||
cb73a9f4 BF |
2383 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2384 | { | |
2385 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2386 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2387 | __be32 status; |
cb73a9f4 | 2388 | |
b78724b7 BF |
2389 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2390 | if (status) | |
2391 | return status; | |
c9a49628 | 2392 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2393 | session->se_cb_prog = bc->bc_cb_program; |
2394 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2395 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2396 | |
2397 | nfsd4_probe_callback(session->se_client); | |
2398 | ||
2399 | return nfs_ok; | |
2400 | } | |
2401 | ||
1d1bc8f2 BF |
2402 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2403 | struct nfsd4_compound_state *cstate, | |
2404 | struct nfsd4_bind_conn_to_session *bcts) | |
2405 | { | |
2406 | __be32 status; | |
3ba63671 | 2407 | struct nfsd4_conn *conn; |
4f6e6c17 | 2408 | struct nfsd4_session *session; |
d4e19e70 TM |
2409 | struct net *net = SVC_NET(rqstp); |
2410 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2411 | |
2412 | if (!nfsd4_last_compound_op(rqstp)) | |
2413 | return nfserr_not_only_op; | |
4f6e6c17 | 2414 | nfs4_lock_state(); |
c9a49628 | 2415 | spin_lock(&nn->client_lock); |
d4e19e70 | 2416 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2417 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2418 | if (!session) |
d4e19e70 | 2419 | goto out_no_session; |
57266a6e BF |
2420 | status = nfserr_wrong_cred; |
2421 | if (!mach_creds_match(session->se_client, rqstp)) | |
2422 | goto out; | |
1d1bc8f2 | 2423 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2424 | if (status) |
4f6e6c17 | 2425 | goto out; |
3ba63671 | 2426 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2427 | status = nfserr_jukebox; |
3ba63671 | 2428 | if (!conn) |
4f6e6c17 BF |
2429 | goto out; |
2430 | nfsd4_init_conn(rqstp, conn, session); | |
2431 | status = nfs_ok; | |
2432 | out: | |
d4e19e70 TM |
2433 | nfsd4_put_session(session); |
2434 | out_no_session: | |
4f6e6c17 BF |
2435 | nfs4_unlock_state(); |
2436 | return status; | |
1d1bc8f2 BF |
2437 | } |
2438 | ||
5d4cec2f BF |
2439 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2440 | { | |
2441 | if (!session) | |
2442 | return 0; | |
2443 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2444 | } | |
2445 | ||
069b6ad4 AA |
2446 | __be32 |
2447 | nfsd4_destroy_session(struct svc_rqst *r, | |
2448 | struct nfsd4_compound_state *cstate, | |
2449 | struct nfsd4_destroy_session *sessionid) | |
2450 | { | |
e10e0cfc | 2451 | struct nfsd4_session *ses; |
abcdff09 | 2452 | __be32 status; |
f0f51f5c | 2453 | int ref_held_by_me = 0; |
d4e19e70 TM |
2454 | struct net *net = SVC_NET(r); |
2455 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2456 | |
abcdff09 BF |
2457 | nfs4_lock_state(); |
2458 | status = nfserr_not_only_op; | |
5d4cec2f | 2459 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2460 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2461 | goto out; |
f0f51f5c | 2462 | ref_held_by_me++; |
57716355 | 2463 | } |
e10e0cfc | 2464 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2465 | spin_lock(&nn->client_lock); |
d4e19e70 | 2466 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2467 | if (!ses) |
2468 | goto out_client_lock; | |
57266a6e BF |
2469 | status = nfserr_wrong_cred; |
2470 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2471 | goto out_put_session; |
f0f51f5c | 2472 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2473 | if (status) |
f0f51f5c | 2474 | goto out_put_session; |
e10e0cfc | 2475 | unhash_session(ses); |
c9a49628 | 2476 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2477 | |
84f5f7cc | 2478 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2479 | |
c9a49628 | 2480 | spin_lock(&nn->client_lock); |
e10e0cfc | 2481 | status = nfs_ok; |
f0f51f5c | 2482 | out_put_session: |
d4e19e70 | 2483 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2484 | out_client_lock: |
2485 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2486 | out: |
abcdff09 | 2487 | nfs4_unlock_state(); |
e10e0cfc | 2488 | return status; |
069b6ad4 AA |
2489 | } |
2490 | ||
a663bdd8 | 2491 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2492 | { |
2493 | struct nfsd4_conn *c; | |
2494 | ||
2495 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2496 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2497 | return c; |
2498 | } | |
2499 | } | |
2500 | return NULL; | |
2501 | } | |
2502 | ||
57266a6e | 2503 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2504 | { |
2505 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2506 | struct nfsd4_conn *c; |
57266a6e | 2507 | __be32 status = nfs_ok; |
21b75b01 | 2508 | int ret; |
328ead28 BF |
2509 | |
2510 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2511 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2512 | if (c) |
2513 | goto out_free; | |
2514 | status = nfserr_conn_not_bound_to_session; | |
2515 | if (clp->cl_mach_cred) | |
2516 | goto out_free; | |
328ead28 BF |
2517 | __nfsd4_hash_conn(new, ses); |
2518 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2519 | ret = nfsd4_register_conn(new); |
2520 | if (ret) | |
2521 | /* oops; xprt is already down: */ | |
2522 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2523 | return nfs_ok; |
2524 | out_free: | |
2525 | spin_unlock(&clp->cl_lock); | |
2526 | free_conn(new); | |
2527 | return status; | |
328ead28 BF |
2528 | } |
2529 | ||
868b89c3 MJ |
2530 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2531 | { | |
2532 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2533 | ||
2534 | return args->opcnt > session->se_fchannel.maxops; | |
2535 | } | |
2536 | ||
ae82a8d0 MJ |
2537 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2538 | struct nfsd4_session *session) | |
2539 | { | |
2540 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2541 | ||
2542 | return xb->len > session->se_fchannel.maxreq_sz; | |
2543 | } | |
2544 | ||
069b6ad4 | 2545 | __be32 |
b85d4c01 | 2546 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2547 | struct nfsd4_compound_state *cstate, |
2548 | struct nfsd4_sequence *seq) | |
2549 | { | |
f9bb94c4 | 2550 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2551 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2552 | struct nfsd4_session *session; |
221a6876 | 2553 | struct nfs4_client *clp; |
b85d4c01 | 2554 | struct nfsd4_slot *slot; |
a663bdd8 | 2555 | struct nfsd4_conn *conn; |
57b7b43b | 2556 | __be32 status; |
47ee5298 | 2557 | int buflen; |
d4e19e70 TM |
2558 | struct net *net = SVC_NET(rqstp); |
2559 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2560 | |
f9bb94c4 AA |
2561 | if (resp->opcnt != 1) |
2562 | return nfserr_sequence_pos; | |
2563 | ||
a663bdd8 BF |
2564 | /* |
2565 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2566 | * below. | |
2567 | */ | |
2568 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2569 | if (!conn) | |
2570 | return nfserr_jukebox; | |
2571 | ||
c9a49628 | 2572 | spin_lock(&nn->client_lock); |
d4e19e70 | 2573 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2574 | if (!session) |
221a6876 BF |
2575 | goto out_no_session; |
2576 | clp = session->se_client; | |
b85d4c01 | 2577 | |
868b89c3 MJ |
2578 | status = nfserr_too_many_ops; |
2579 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2580 | goto out_put_session; |
868b89c3 | 2581 | |
ae82a8d0 MJ |
2582 | status = nfserr_req_too_big; |
2583 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2584 | goto out_put_session; |
ae82a8d0 | 2585 | |
b85d4c01 | 2586 | status = nfserr_badslot; |
6c18ba9f | 2587 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2588 | goto out_put_session; |
b85d4c01 | 2589 | |
557ce264 | 2590 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2591 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2592 | ||
a8dfdaeb AA |
2593 | /* We do not negotiate the number of slots yet, so set the |
2594 | * maxslots to the session maxreqs which is used to encode | |
2595 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2596 | seq->maxslots = session->se_fchannel.maxreqs; | |
2597 | ||
73e79482 BF |
2598 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2599 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2600 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2601 | status = nfserr_seq_misordered; |
2602 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2603 | goto out_put_session; |
b85d4c01 BH |
2604 | cstate->slot = slot; |
2605 | cstate->session = session; | |
4b24ca7d | 2606 | cstate->clp = clp; |
da3846a2 | 2607 | /* Return the cached reply status and set cstate->status |
557ce264 | 2608 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2609 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2610 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2611 | goto out; |
b85d4c01 BH |
2612 | } |
2613 | if (status) | |
66b2b9b2 | 2614 | goto out_put_session; |
b85d4c01 | 2615 | |
57266a6e | 2616 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2617 | conn = NULL; |
57266a6e BF |
2618 | if (status) |
2619 | goto out_put_session; | |
328ead28 | 2620 | |
47ee5298 BF |
2621 | buflen = (seq->cachethis) ? |
2622 | session->se_fchannel.maxresp_cached : | |
2623 | session->se_fchannel.maxresp_sz; | |
2624 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2625 | nfserr_rep_too_big; | |
a5cddc88 | 2626 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2627 | goto out_put_session; |
32aaa62e | 2628 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2629 | |
2630 | status = nfs_ok; | |
b85d4c01 | 2631 | /* Success! bump slot seqid */ |
b85d4c01 | 2632 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2633 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2634 | if (seq->cachethis) |
2635 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2636 | else |
2637 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2638 | |
2639 | cstate->slot = slot; | |
2640 | cstate->session = session; | |
4b24ca7d | 2641 | cstate->clp = clp; |
b85d4c01 | 2642 | |
b85d4c01 | 2643 | out: |
221a6876 BF |
2644 | switch (clp->cl_cb_state) { |
2645 | case NFSD4_CB_DOWN: | |
2646 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2647 | break; | |
2648 | case NFSD4_CB_FAULT: | |
2649 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2650 | break; | |
2651 | default: | |
2652 | seq->status_flags = 0; | |
aaf84eb9 | 2653 | } |
3bd64a5b BF |
2654 | if (!list_empty(&clp->cl_revoked)) |
2655 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2656 | out_no_session: |
3f42d2c4 KM |
2657 | if (conn) |
2658 | free_conn(conn); | |
c9a49628 | 2659 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2660 | return status; |
66b2b9b2 | 2661 | out_put_session: |
d4e19e70 | 2662 | nfsd4_put_session_locked(session); |
221a6876 | 2663 | goto out_no_session; |
069b6ad4 AA |
2664 | } |
2665 | ||
b607664e TM |
2666 | void |
2667 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2668 | { | |
2669 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2670 | ||
2671 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2672 | if (cs->status != nfserr_replay_cache) { |
2673 | nfsd4_store_cache_entry(resp); | |
2674 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2675 | } | |
d4e19e70 | 2676 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2677 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2678 | } else if (cs->clp) |
2679 | put_client_renew(cs->clp); | |
b607664e TM |
2680 | } |
2681 | ||
345c2842 MJ |
2682 | __be32 |
2683 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2684 | { | |
2685 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2686 | __be32 status = 0; |
8daae4dc | 2687 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2688 | |
2689 | nfs4_lock_state(); | |
0a7ec377 | 2690 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2691 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2692 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2693 | |
2694 | if (conf) { | |
2695 | clp = conf; | |
2696 | ||
c0293b01 | 2697 | if (client_has_state(conf)) { |
345c2842 MJ |
2698 | status = nfserr_clientid_busy; |
2699 | goto out; | |
2700 | } | |
2701 | } else if (unconf) | |
2702 | clp = unconf; | |
2703 | else { | |
2704 | status = nfserr_stale_clientid; | |
2705 | goto out; | |
2706 | } | |
57266a6e BF |
2707 | if (!mach_creds_match(clp, rqstp)) { |
2708 | status = nfserr_wrong_cred; | |
2709 | goto out; | |
2710 | } | |
345c2842 MJ |
2711 | expire_client(clp); |
2712 | out: | |
2713 | nfs4_unlock_state(); | |
345c2842 MJ |
2714 | return status; |
2715 | } | |
2716 | ||
4dc6ec00 BF |
2717 | __be32 |
2718 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2719 | { | |
57b7b43b | 2720 | __be32 status = 0; |
bcecf1cc | 2721 | |
4dc6ec00 BF |
2722 | if (rc->rca_one_fs) { |
2723 | if (!cstate->current_fh.fh_dentry) | |
2724 | return nfserr_nofilehandle; | |
2725 | /* | |
2726 | * We don't take advantage of the rca_one_fs case. | |
2727 | * That's OK, it's optional, we can safely ignore it. | |
2728 | */ | |
2729 | return nfs_ok; | |
2730 | } | |
bcecf1cc | 2731 | |
4dc6ec00 | 2732 | nfs4_lock_state(); |
bcecf1cc | 2733 | status = nfserr_complete_already; |
a52d726b JL |
2734 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2735 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2736 | goto out; |
2737 | ||
2738 | status = nfserr_stale_clientid; | |
2739 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2740 | /* |
2741 | * The following error isn't really legal. | |
2742 | * But we only get here if the client just explicitly | |
2743 | * destroyed the client. Surely it no longer cares what | |
2744 | * error it gets back on an operation for the dead | |
2745 | * client. | |
2746 | */ | |
bcecf1cc MJ |
2747 | goto out; |
2748 | ||
2749 | status = nfs_ok; | |
2a4317c5 | 2750 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2751 | out: |
4dc6ec00 | 2752 | nfs4_unlock_state(); |
bcecf1cc | 2753 | return status; |
4dc6ec00 BF |
2754 | } |
2755 | ||
b37ad28b | 2756 | __be32 |
b591480b BF |
2757 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2758 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2759 | { |
a084daf5 | 2760 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2761 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2762 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2763 | __be32 status; |
c212cecf SK |
2764 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2765 | ||
63db4632 | 2766 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2767 | nfs4_lock_state(); |
382a62e7 | 2768 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2769 | if (conf) { |
63db4632 | 2770 | /* case 0: */ |
1da177e4 | 2771 | status = nfserr_clid_inuse; |
e203d506 BF |
2772 | if (clp_used_exchangeid(conf)) |
2773 | goto out; | |
026722c2 | 2774 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2775 | char addr_str[INET6_ADDRSTRLEN]; |
2776 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2777 | sizeof(addr_str)); | |
2778 | dprintk("NFSD: setclientid: string in use by client " | |
2779 | "at %s\n", addr_str); | |
1da177e4 LT |
2780 | goto out; |
2781 | } | |
1da177e4 | 2782 | } |
a99454aa | 2783 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2784 | if (unconf) |
2785 | expire_client(unconf); | |
3e772463 | 2786 | status = nfserr_jukebox; |
2216d449 | 2787 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2788 | if (new == NULL) |
2789 | goto out; | |
34b232bb | 2790 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2791 | /* case 1: probable callback update */ |
1da177e4 | 2792 | copy_clid(new, conf); |
34b232bb | 2793 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2794 | gen_clid(new, nn); |
8323c3b2 | 2795 | new->cl_minorversion = 0; |
6f3d772f | 2796 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2797 | add_to_unconfirmed(new); |
1da177e4 LT |
2798 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2799 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2800 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2801 | status = nfs_ok; | |
2802 | out: | |
2803 | nfs4_unlock_state(); | |
2804 | return status; | |
2805 | } | |
2806 | ||
2807 | ||
b37ad28b | 2808 | __be32 |
b591480b BF |
2809 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2810 | struct nfsd4_compound_state *cstate, | |
2811 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2812 | { |
21ab45a4 | 2813 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2814 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2815 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2816 | __be32 status; |
7f2210fa | 2817 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2818 | |
2c142baa | 2819 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2820 | return nfserr_stale_clientid; |
1da177e4 | 2821 | nfs4_lock_state(); |
21ab45a4 | 2822 | |
8daae4dc | 2823 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2824 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2825 | /* |
8695b90a BF |
2826 | * We try hard to give out unique clientid's, so if we get an |
2827 | * attempt to confirm the same clientid with a different cred, | |
2828 | * there's a bug somewhere. Let's charitably assume it's our | |
2829 | * bug. | |
a186e767 | 2830 | */ |
8695b90a BF |
2831 | status = nfserr_serverfault; |
2832 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2833 | goto out; | |
2834 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2835 | goto out; | |
63db4632 | 2836 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2837 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2838 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2839 | status = nfs_ok; |
90d700b7 BF |
2840 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2841 | status = nfserr_stale_clientid; | |
2842 | goto out; | |
2843 | } | |
2844 | status = nfs_ok; | |
2845 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2846 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2847 | nfsd4_probe_callback(conf); | |
2848 | expire_client(unconf); | |
90d700b7 | 2849 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2850 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2851 | if (conf) { |
2852 | status = mark_client_expired(conf); | |
2853 | if (status) | |
2854 | goto out; | |
8695b90a | 2855 | expire_client(conf); |
221a6876 | 2856 | } |
8695b90a | 2857 | move_to_confirmed(unconf); |
f3d03b92 | 2858 | nfsd4_probe_callback(unconf); |
08e8987c | 2859 | } |
1da177e4 | 2860 | out: |
1da177e4 LT |
2861 | nfs4_unlock_state(); |
2862 | return status; | |
2863 | } | |
2864 | ||
32513b40 BF |
2865 | static struct nfs4_file *nfsd4_alloc_file(void) |
2866 | { | |
2867 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2868 | } | |
2869 | ||
1da177e4 | 2870 | /* OPEN Share state helper functions */ |
f9c00c3a | 2871 | static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) |
1da177e4 | 2872 | { |
ca943217 | 2873 | unsigned int hashval = file_hashval(fh); |
1da177e4 | 2874 | |
950e0118 TM |
2875 | lockdep_assert_held(&state_lock); |
2876 | ||
32513b40 | 2877 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2878 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2879 | INIT_LIST_HEAD(&fp->fi_stateids); |
2880 | INIT_LIST_HEAD(&fp->fi_delegations); | |
e2cf80d7 | 2881 | fh_copy_shallow(&fp->fi_fhandle, fh); |
32513b40 BF |
2882 | fp->fi_had_conflict = false; |
2883 | fp->fi_lease = NULL; | |
baeb4ff0 | 2884 | fp->fi_share_deny = 0; |
32513b40 BF |
2885 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2886 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2887 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2888 | } |
2889 | ||
e8ff2a84 | 2890 | void |
1da177e4 LT |
2891 | nfsd4_free_slabs(void) |
2892 | { | |
abf1135b CH |
2893 | kmem_cache_destroy(openowner_slab); |
2894 | kmem_cache_destroy(lockowner_slab); | |
2895 | kmem_cache_destroy(file_slab); | |
2896 | kmem_cache_destroy(stateid_slab); | |
2897 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2898 | } |
1da177e4 | 2899 | |
72083396 | 2900 | int |
e60d4398 N |
2901 | nfsd4_init_slabs(void) |
2902 | { | |
fe0750e5 BF |
2903 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2904 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2905 | if (openowner_slab == NULL) | |
abf1135b | 2906 | goto out; |
fe0750e5 | 2907 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2908 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2909 | if (lockowner_slab == NULL) |
abf1135b | 2910 | goto out_free_openowner_slab; |
e60d4398 | 2911 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2912 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2913 | if (file_slab == NULL) |
abf1135b | 2914 | goto out_free_lockowner_slab; |
5ac049ac | 2915 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2916 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2917 | if (stateid_slab == NULL) |
abf1135b | 2918 | goto out_free_file_slab; |
5b2d21c1 | 2919 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2920 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2921 | if (deleg_slab == NULL) |
abf1135b | 2922 | goto out_free_stateid_slab; |
e60d4398 | 2923 | return 0; |
abf1135b CH |
2924 | |
2925 | out_free_stateid_slab: | |
2926 | kmem_cache_destroy(stateid_slab); | |
2927 | out_free_file_slab: | |
2928 | kmem_cache_destroy(file_slab); | |
2929 | out_free_lockowner_slab: | |
2930 | kmem_cache_destroy(lockowner_slab); | |
2931 | out_free_openowner_slab: | |
2932 | kmem_cache_destroy(openowner_slab); | |
2933 | out: | |
e60d4398 N |
2934 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2935 | return -ENOMEM; | |
1da177e4 LT |
2936 | } |
2937 | ||
ff194bd9 | 2938 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2939 | { |
ff194bd9 BF |
2940 | rp->rp_status = nfserr_serverfault; |
2941 | rp->rp_buflen = 0; | |
2942 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2943 | } |
2944 | ||
fe0750e5 | 2945 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2946 | { |
1da177e4 | 2947 | struct nfs4_stateowner *sop; |
1da177e4 | 2948 | |
fe0750e5 | 2949 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2950 | if (!sop) |
2951 | return NULL; | |
2952 | ||
2953 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2954 | if (!sop->so_owner.data) { | |
fe0750e5 | 2955 | kmem_cache_free(slab, sop); |
1da177e4 | 2956 | return NULL; |
ff194bd9 BF |
2957 | } |
2958 | sop->so_owner.len = owner->len; | |
2959 | ||
ea1da636 | 2960 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2961 | sop->so_client = clp; |
2962 | init_nfs4_replay(&sop->so_replay); | |
2963 | return sop; | |
2964 | } | |
2965 | ||
fe0750e5 | 2966 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2967 | { |
9b531137 SK |
2968 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2969 | ||
2970 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2971 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2972 | } |
2973 | ||
fe0750e5 | 2974 | static struct nfs4_openowner * |
13d6f66b | 2975 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
2976 | struct nfsd4_compound_state *cstate) |
2977 | { | |
13d6f66b | 2978 | struct nfs4_client *clp = cstate->clp; |
fe0750e5 | 2979 | struct nfs4_openowner *oo; |
ff194bd9 | 2980 | |
fe0750e5 BF |
2981 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2982 | if (!oo) | |
ff194bd9 | 2983 | return NULL; |
fe0750e5 BF |
2984 | oo->oo_owner.so_is_open_owner = 1; |
2985 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2986 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2987 | if (nfsd4_has_session(cstate)) |
2988 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2989 | oo->oo_time = 0; |
38c387b5 | 2990 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2991 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2992 | hash_openowner(oo, clp, strhashval); | |
2993 | return oo; | |
1da177e4 LT |
2994 | } |
2995 | ||
996e0938 | 2996 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2997 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2998 | |
3abdb607 | 2999 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3000 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3001 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 3002 | get_nfs4_file(fp); |
11b9164a | 3003 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3004 | stp->st_access_bmap = 0; |
3005 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3006 | stp->st_openstp = NULL; |
1c755dc1 JL |
3007 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3008 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3009 | spin_lock(&fp->fi_lock); |
3010 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3011 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3012 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3013 | } |
3014 | ||
fd39ca9a | 3015 | static void |
73758fed | 3016 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 3017 | { |
73758fed SK |
3018 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3019 | ||
fe0750e5 | 3020 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3021 | |
73758fed | 3022 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3023 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3024 | } |
3025 | ||
1da177e4 | 3026 | static int |
599e0a22 BF |
3027 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
3028 | clientid_t *clid) | |
3029 | { | |
3030 | return (sop->so_owner.len == owner->len) && | |
3031 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
3032 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
3033 | } |
3034 | ||
fe0750e5 | 3035 | static struct nfs4_openowner * |
9b531137 SK |
3036 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
3037 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 3038 | { |
a50d2ad1 BF |
3039 | struct nfs4_stateowner *so; |
3040 | struct nfs4_openowner *oo; | |
d15c077e | 3041 | struct nfs4_client *clp; |
1da177e4 | 3042 | |
9b531137 | 3043 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
3044 | if (!so->so_is_open_owner) |
3045 | continue; | |
a50d2ad1 BF |
3046 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
3047 | oo = openowner(so); | |
d15c077e BF |
3048 | clp = oo->oo_owner.so_client; |
3049 | if ((bool)clp->cl_minorversion != sessions) | |
3050 | return NULL; | |
a50d2ad1 BF |
3051 | renew_client(oo->oo_owner.so_client); |
3052 | return oo; | |
3053 | } | |
1da177e4 LT |
3054 | } |
3055 | return NULL; | |
3056 | } | |
3057 | ||
3058 | /* search file_hashtbl[] for file */ | |
3059 | static struct nfs4_file * | |
ca943217 | 3060 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3061 | { |
ca943217 | 3062 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3063 | struct nfs4_file *fp; |
3064 | ||
950e0118 TM |
3065 | lockdep_assert_held(&state_lock); |
3066 | ||
89876f8c | 3067 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3068 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3069 | get_nfs4_file(fp); |
1da177e4 | 3070 | return fp; |
13cd2184 | 3071 | } |
1da177e4 LT |
3072 | } |
3073 | return NULL; | |
3074 | } | |
3075 | ||
950e0118 | 3076 | static struct nfs4_file * |
ca943217 | 3077 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3078 | { |
3079 | struct nfs4_file *fp; | |
3080 | ||
3081 | spin_lock(&state_lock); | |
ca943217 | 3082 | fp = find_file_locked(fh); |
950e0118 TM |
3083 | spin_unlock(&state_lock); |
3084 | return fp; | |
3085 | } | |
3086 | ||
3087 | static struct nfs4_file * | |
f9c00c3a | 3088 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3089 | { |
3090 | struct nfs4_file *fp; | |
3091 | ||
3092 | spin_lock(&state_lock); | |
ca943217 | 3093 | fp = find_file_locked(fh); |
950e0118 | 3094 | if (fp == NULL) { |
f9c00c3a | 3095 | nfsd4_init_file(new, fh); |
950e0118 TM |
3096 | fp = new; |
3097 | } | |
3098 | spin_unlock(&state_lock); | |
3099 | ||
3100 | return fp; | |
3101 | } | |
3102 | ||
1da177e4 LT |
3103 | /* |
3104 | * Called to check deny when READ with all zero stateid or | |
3105 | * WRITE with all zero or all one stateid | |
3106 | */ | |
b37ad28b | 3107 | static __be32 |
1da177e4 LT |
3108 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3109 | { | |
1da177e4 | 3110 | struct nfs4_file *fp; |
baeb4ff0 | 3111 | __be32 ret = nfs_ok; |
1da177e4 | 3112 | |
ca943217 | 3113 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3114 | if (!fp) |
baeb4ff0 JL |
3115 | return ret; |
3116 | /* Check for conflicting share reservations */ | |
1d31a253 | 3117 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3118 | if (fp->fi_share_deny & deny_type) |
3119 | ret = nfserr_locked; | |
1d31a253 | 3120 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3121 | put_nfs4_file(fp); |
3122 | return ret; | |
1da177e4 LT |
3123 | } |
3124 | ||
02e1215f | 3125 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3126 | { |
11b9164a TM |
3127 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3128 | nfsd_net_id); | |
e8c69d17 | 3129 | |
11b9164a | 3130 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3131 | |
dff1399f | 3132 | /* |
f54fe962 JL |
3133 | * We can't do this in nfsd_break_deleg_cb because it is |
3134 | * already holding inode->i_lock. | |
3135 | * | |
dff1399f JL |
3136 | * If the dl_time != 0, then we know that it has already been |
3137 | * queued for a lease break. Don't queue it again. | |
3138 | */ | |
f54fe962 | 3139 | spin_lock(&state_lock); |
dff1399f | 3140 | if (dp->dl_time == 0) { |
dff1399f | 3141 | dp->dl_time = get_seconds(); |
02e1215f | 3142 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3143 | } |
02e1215f JL |
3144 | spin_unlock(&state_lock); |
3145 | } | |
1da177e4 | 3146 | |
02e1215f JL |
3147 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3148 | { | |
3149 | /* | |
3150 | * We're assuming the state code never drops its reference | |
3151 | * without first removing the lease. Since we're in this lease | |
3152 | * callback (and since the lease code is serialized by the kernel | |
3153 | * lock) we know the server hasn't removed the lease yet, we know | |
3154 | * it's safe to take a reference. | |
3155 | */ | |
72c0b0fb | 3156 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3157 | nfsd4_cb_recall(dp); |
3158 | } | |
3159 | ||
1c8c601a | 3160 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3161 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3162 | { | |
acfdf5c3 BF |
3163 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3164 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3165 | |
7fa10cd1 BF |
3166 | if (!fp) { |
3167 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3168 | return; | |
3169 | } | |
3170 | if (fp->fi_had_conflict) { | |
3171 | WARN(1, "duplicate break on %p\n", fp); | |
3172 | return; | |
3173 | } | |
0272e1fd BF |
3174 | /* |
3175 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3176 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3177 | * in time: |
0272e1fd BF |
3178 | */ |
3179 | fl->fl_break_time = 0; | |
1da177e4 | 3180 | |
02e1215f | 3181 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3182 | fp->fi_had_conflict = true; |
3183 | /* | |
3184 | * If there are no delegations on the list, then we can't count on this | |
3185 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3186 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3187 | * true should keep any new delegations from being hashed. | |
3188 | */ | |
3189 | if (list_empty(&fp->fi_delegations)) | |
3190 | fl->fl_break_time = jiffies; | |
3191 | else | |
3192 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3193 | nfsd_break_one_deleg(dp); | |
02e1215f | 3194 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3195 | } |
3196 | ||
1da177e4 LT |
3197 | static |
3198 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3199 | { | |
3200 | if (arg & F_UNLCK) | |
3201 | return lease_modify(onlist, arg); | |
3202 | else | |
3203 | return -EAGAIN; | |
3204 | } | |
3205 | ||
7b021967 | 3206 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3207 | .lm_break = nfsd_break_deleg_cb, |
3208 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3209 | }; |
3210 | ||
7a8711c9 BF |
3211 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3212 | { | |
3213 | if (nfsd4_has_session(cstate)) | |
3214 | return nfs_ok; | |
3215 | if (seqid == so->so_seqid - 1) | |
3216 | return nfserr_replay_me; | |
3217 | if (seqid == so->so_seqid) | |
3218 | return nfs_ok; | |
3219 | return nfserr_bad_seqid; | |
3220 | } | |
1da177e4 | 3221 | |
4b24ca7d JL |
3222 | static __be32 lookup_clientid(clientid_t *clid, |
3223 | struct nfsd4_compound_state *cstate, | |
3224 | struct nfsd_net *nn) | |
3225 | { | |
3226 | struct nfs4_client *found; | |
3227 | ||
3228 | if (cstate->clp) { | |
3229 | found = cstate->clp; | |
3230 | if (!same_clid(&found->cl_clientid, clid)) | |
3231 | return nfserr_stale_clientid; | |
3232 | return nfs_ok; | |
3233 | } | |
3234 | ||
3235 | if (STALE_CLIENTID(clid, nn)) | |
3236 | return nfserr_stale_clientid; | |
3237 | ||
3238 | /* | |
3239 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3240 | * cached already then we know this is for is for v4.0 and "sessions" | |
3241 | * will be false. | |
3242 | */ | |
3243 | WARN_ON_ONCE(cstate->session); | |
3244 | found = find_confirmed_client(clid, false, nn); | |
3245 | if (!found) | |
3246 | return nfserr_expired; | |
3247 | ||
3248 | /* Cache the nfs4_client in cstate! */ | |
3249 | cstate->clp = found; | |
3250 | atomic_inc(&found->cl_refcount); | |
3251 | return nfs_ok; | |
3252 | } | |
3253 | ||
b37ad28b | 3254 | __be32 |
6668958f | 3255 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3256 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3257 | { |
1da177e4 LT |
3258 | clientid_t *clientid = &open->op_clientid; |
3259 | struct nfs4_client *clp = NULL; | |
3260 | unsigned int strhashval; | |
fe0750e5 | 3261 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3262 | __be32 status; |
1da177e4 | 3263 | |
2c142baa | 3264 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3265 | return nfserr_stale_clientid; |
32513b40 BF |
3266 | /* |
3267 | * In case we need it later, after we've already created the | |
3268 | * file and don't want to risk a further failure: | |
3269 | */ | |
3270 | open->op_file = nfsd4_alloc_file(); | |
3271 | if (open->op_file == NULL) | |
3272 | return nfserr_jukebox; | |
1da177e4 | 3273 | |
2d91e895 TM |
3274 | status = lookup_clientid(clientid, cstate, nn); |
3275 | if (status) | |
3276 | return status; | |
3277 | clp = cstate->clp; | |
3278 | ||
16bfdaaf | 3279 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3280 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3281 | open->op_openowner = oo; |
3282 | if (!oo) { | |
bcf130f9 | 3283 | goto new_owner; |
1da177e4 | 3284 | } |
dad1c067 | 3285 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3286 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3287 | release_openowner(oo); |
3288 | open->op_openowner = NULL; | |
bcf130f9 | 3289 | goto new_owner; |
0f442aa2 | 3290 | } |
4cdc951b BF |
3291 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3292 | if (status) | |
3293 | return status; | |
4cdc951b | 3294 | goto alloc_stateid; |
bcf130f9 | 3295 | new_owner: |
13d6f66b | 3296 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3297 | if (oo == NULL) |
3298 | return nfserr_jukebox; | |
3299 | open->op_openowner = oo; | |
4cdc951b | 3300 | alloc_stateid: |
b49e084d | 3301 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3302 | if (!open->op_stp) |
3303 | return nfserr_jukebox; | |
0f442aa2 | 3304 | return nfs_ok; |
1da177e4 LT |
3305 | } |
3306 | ||
b37ad28b | 3307 | static inline __be32 |
4a6e43e6 N |
3308 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3309 | { | |
3310 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3311 | return nfserr_openmode; | |
3312 | else | |
3313 | return nfs_ok; | |
3314 | } | |
3315 | ||
f459e453 | 3316 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3317 | { |
f459e453 | 3318 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3319 | } |
3320 | ||
38c2f4b1 | 3321 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3322 | { |
f459e453 | 3323 | struct nfs4_stid *ret; |
24a0111e | 3324 | |
38c2f4b1 | 3325 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3326 | if (!ret) |
3327 | return NULL; | |
dcd94cc2 TM |
3328 | /* FIXME: move into find_stateid_by_type */ |
3329 | atomic_inc(&ret->sc_count); | |
f459e453 | 3330 | return delegstateid(ret); |
24a0111e BF |
3331 | } |
3332 | ||
8b289b2c BF |
3333 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3334 | { | |
3335 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3336 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3337 | } | |
3338 | ||
b37ad28b | 3339 | static __be32 |
41d22663 | 3340 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3341 | struct nfs4_delegation **dp) |
3342 | { | |
3343 | int flags; | |
b37ad28b | 3344 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3345 | struct nfs4_delegation *deleg; |
567d9829 | 3346 | |
dcd94cc2 TM |
3347 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3348 | if (deleg == NULL) | |
c44c5eeb | 3349 | goto out; |
24a0111e | 3350 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3351 | status = nfs4_check_delegmode(deleg, flags); |
3352 | if (status) { | |
3353 | nfs4_put_stid(&deleg->dl_stid); | |
3354 | goto out; | |
3355 | } | |
3356 | *dp = deleg; | |
c44c5eeb | 3357 | out: |
8b289b2c | 3358 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3359 | return nfs_ok; |
3360 | if (status) | |
3361 | return status; | |
dad1c067 | 3362 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3363 | return nfs_ok; |
567d9829 N |
3364 | } |
3365 | ||
a46cb7f2 JL |
3366 | static struct nfs4_ol_stateid * |
3367 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3368 | { |
a46cb7f2 | 3369 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3370 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3371 | |
1d31a253 | 3372 | spin_lock(&fp->fi_lock); |
8beefa24 | 3373 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3374 | /* ignore lock owners */ |
3375 | if (local->st_stateowner->so_is_open_owner == 0) | |
3376 | continue; | |
baeb4ff0 | 3377 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3378 | ret = local; |
baeb4ff0 | 3379 | break; |
1d31a253 | 3380 | } |
1da177e4 | 3381 | } |
1d31a253 | 3382 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3383 | return ret; |
1da177e4 LT |
3384 | } |
3385 | ||
21fb4016 BF |
3386 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3387 | { | |
3388 | int flags = 0; | |
3389 | ||
3390 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3391 | flags |= NFSD_MAY_READ; | |
3392 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3393 | flags |= NFSD_MAY_WRITE; | |
3394 | return flags; | |
3395 | } | |
3396 | ||
7e6a72e5 CH |
3397 | static inline __be32 |
3398 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3399 | struct nfsd4_open *open) | |
3400 | { | |
3401 | struct iattr iattr = { | |
3402 | .ia_valid = ATTR_SIZE, | |
3403 | .ia_size = 0, | |
3404 | }; | |
3405 | if (!open->op_truncate) | |
3406 | return 0; | |
3407 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3408 | return nfserr_inval; | |
3409 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3410 | } | |
3411 | ||
0c12eaff | 3412 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3413 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3414 | struct nfsd4_open *open) | |
f9d7562f | 3415 | { |
de18643d | 3416 | struct file *filp = NULL; |
f9d7562f | 3417 | __be32 status; |
0c12eaff CB |
3418 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3419 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3420 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3421 | |
de18643d | 3422 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3423 | |
3424 | /* | |
3425 | * Are we trying to set a deny mode that would conflict with | |
3426 | * current access? | |
3427 | */ | |
3428 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3429 | if (status != nfs_ok) { | |
3430 | spin_unlock(&fp->fi_lock); | |
3431 | goto out; | |
3432 | } | |
3433 | ||
3434 | /* set access to the file */ | |
3435 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3436 | if (status != nfs_ok) { | |
3437 | spin_unlock(&fp->fi_lock); | |
3438 | goto out; | |
3439 | } | |
3440 | ||
3441 | /* Set access bits in stateid */ | |
3442 | old_access_bmap = stp->st_access_bmap; | |
3443 | set_access(open->op_share_access, stp); | |
3444 | ||
3445 | /* Set new deny mask */ | |
3446 | old_deny_bmap = stp->st_deny_bmap; | |
3447 | set_deny(open->op_share_deny, stp); | |
3448 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3449 | ||
f9d7562f | 3450 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3451 | spin_unlock(&fp->fi_lock); |
3452 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3453 | if (status) |
baeb4ff0 | 3454 | goto out_put_access; |
de18643d TM |
3455 | spin_lock(&fp->fi_lock); |
3456 | if (!fp->fi_fds[oflag]) { | |
3457 | fp->fi_fds[oflag] = filp; | |
3458 | filp = NULL; | |
3459 | } | |
f9d7562f | 3460 | } |
de18643d TM |
3461 | spin_unlock(&fp->fi_lock); |
3462 | if (filp) | |
3463 | fput(filp); | |
f9d7562f | 3464 | |
7e6a72e5 CH |
3465 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3466 | if (status) | |
3467 | goto out_put_access; | |
7e6a72e5 CH |
3468 | out: |
3469 | return status; | |
baeb4ff0 JL |
3470 | out_put_access: |
3471 | stp->st_access_bmap = old_access_bmap; | |
3472 | nfs4_file_put_access(fp, open->op_share_access); | |
3473 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3474 | goto out; | |
1da177e4 LT |
3475 | } |
3476 | ||
b37ad28b | 3477 | static __be32 |
dcef0413 | 3478 | 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 | 3479 | { |
b37ad28b | 3480 | __be32 status; |
baeb4ff0 | 3481 | unsigned char old_deny_bmap; |
1da177e4 | 3482 | |
6eb3a1d0 | 3483 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3484 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3485 | |
baeb4ff0 JL |
3486 | /* test and set deny mode */ |
3487 | spin_lock(&fp->fi_lock); | |
3488 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3489 | if (status == nfs_ok) { | |
3490 | old_deny_bmap = stp->st_deny_bmap; | |
3491 | set_deny(open->op_share_deny, stp); | |
3492 | fp->fi_share_deny |= | |
3493 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3494 | } | |
3495 | spin_unlock(&fp->fi_lock); | |
3496 | ||
3497 | if (status != nfs_ok) | |
1da177e4 | 3498 | return status; |
1da177e4 | 3499 | |
baeb4ff0 JL |
3500 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3501 | if (status != nfs_ok) | |
3502 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3503 | return status; | |
3504 | } | |
1da177e4 | 3505 | |
1da177e4 | 3506 | static void |
1255a8f3 | 3507 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3508 | { |
dad1c067 | 3509 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3510 | } |
3511 | ||
14a24e99 BF |
3512 | /* Should we give out recallable state?: */ |
3513 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3514 | { | |
3515 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3516 | return true; | |
3517 | /* | |
3518 | * In the sessions case, since we don't have to establish a | |
3519 | * separate connection for callbacks, we assume it's OK | |
3520 | * until we hear otherwise: | |
3521 | */ | |
3522 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3523 | } | |
3524 | ||
d564fbec | 3525 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3526 | { |
3527 | struct file_lock *fl; | |
3528 | ||
3529 | fl = locks_alloc_lock(); | |
3530 | if (!fl) | |
3531 | return NULL; | |
3532 | locks_init_lock(fl); | |
3533 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3534 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3535 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3536 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3537 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3538 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3539 | return fl; |
3540 | } | |
3541 | ||
99c41515 | 3542 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3543 | { |
11b9164a | 3544 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3545 | struct file_lock *fl; |
417c6629 JL |
3546 | struct file *filp; |
3547 | int status = 0; | |
edab9782 | 3548 | |
d564fbec | 3549 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3550 | if (!fl) |
3551 | return -ENOMEM; | |
417c6629 JL |
3552 | filp = find_readable_file(fp); |
3553 | if (!filp) { | |
3554 | /* We should always have a readable file here */ | |
3555 | WARN_ON_ONCE(1); | |
3556 | return -EBADF; | |
3557 | } | |
3558 | fl->fl_file = filp; | |
3559 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3560 | if (status) { | |
3561 | locks_free_lock(fl); | |
3562 | goto out_fput; | |
3563 | } | |
3564 | spin_lock(&state_lock); | |
3565 | spin_lock(&fp->fi_lock); | |
3566 | /* Did the lease get broken before we took the lock? */ | |
3567 | status = -EAGAIN; | |
3568 | if (fp->fi_had_conflict) | |
3569 | goto out_unlock; | |
3570 | /* Race breaker */ | |
3571 | if (fp->fi_lease) { | |
3572 | status = 0; | |
3573 | atomic_inc(&fp->fi_delegees); | |
3574 | hash_delegation_locked(dp, fp); | |
3575 | goto out_unlock; | |
3576 | } | |
acfdf5c3 | 3577 | fp->fi_lease = fl; |
417c6629 | 3578 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3579 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3580 | hash_delegation_locked(dp, fp); |
417c6629 | 3581 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3582 | spin_unlock(&state_lock); |
acfdf5c3 | 3583 | return 0; |
417c6629 JL |
3584 | out_unlock: |
3585 | spin_unlock(&fp->fi_lock); | |
3586 | spin_unlock(&state_lock); | |
3587 | out_fput: | |
3588 | fput(filp); | |
e873088f | 3589 | return status; |
acfdf5c3 BF |
3590 | } |
3591 | ||
0b26693c JL |
3592 | static struct nfs4_delegation * |
3593 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3594 | struct nfs4_file *fp) | |
acfdf5c3 | 3595 | { |
0b26693c JL |
3596 | int status; |
3597 | struct nfs4_delegation *dp; | |
417c6629 | 3598 | |
bf7bd3e9 | 3599 | if (fp->fi_had_conflict) |
0b26693c JL |
3600 | return ERR_PTR(-EAGAIN); |
3601 | ||
3602 | dp = alloc_init_deleg(clp, fh); | |
3603 | if (!dp) | |
3604 | return ERR_PTR(-ENOMEM); | |
3605 | ||
bf7bd3e9 | 3606 | get_nfs4_file(fp); |
417c6629 JL |
3607 | spin_lock(&state_lock); |
3608 | spin_lock(&fp->fi_lock); | |
11b9164a | 3609 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3610 | if (!fp->fi_lease) { |
3611 | spin_unlock(&fp->fi_lock); | |
3612 | spin_unlock(&state_lock); | |
0b26693c JL |
3613 | status = nfs4_setlease(dp); |
3614 | goto out; | |
417c6629 | 3615 | } |
cbf7a75b | 3616 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3617 | if (fp->fi_had_conflict) { |
417c6629 JL |
3618 | status = -EAGAIN; |
3619 | goto out_unlock; | |
acfdf5c3 | 3620 | } |
931ee56c | 3621 | hash_delegation_locked(dp, fp); |
0b26693c | 3622 | status = 0; |
417c6629 JL |
3623 | out_unlock: |
3624 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3625 | spin_unlock(&state_lock); |
0b26693c JL |
3626 | out: |
3627 | if (status) { | |
6011695d | 3628 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3629 | return ERR_PTR(status); |
3630 | } | |
3631 | return dp; | |
edab9782 BF |
3632 | } |
3633 | ||
4aa8913c BH |
3634 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3635 | { | |
3636 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3637 | if (status == -EAGAIN) | |
3638 | open->op_why_no_deleg = WND4_CONTENTION; | |
3639 | else { | |
3640 | open->op_why_no_deleg = WND4_RESOURCE; | |
3641 | switch (open->op_deleg_want) { | |
3642 | case NFS4_SHARE_WANT_READ_DELEG: | |
3643 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3644 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3645 | break; | |
3646 | case NFS4_SHARE_WANT_CANCEL: | |
3647 | open->op_why_no_deleg = WND4_CANCELLED; | |
3648 | break; | |
3649 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3650 | WARN_ON_ONCE(1); |
4aa8913c BH |
3651 | } |
3652 | } | |
3653 | } | |
3654 | ||
1da177e4 LT |
3655 | /* |
3656 | * Attempt to hand out a delegation. | |
99c41515 BF |
3657 | * |
3658 | * Note we don't support write delegations, and won't until the vfs has | |
3659 | * proper support for them. | |
1da177e4 LT |
3660 | */ |
3661 | static void | |
4cf59221 JL |
3662 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3663 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3664 | { |
3665 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3666 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3667 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3668 | int cb_up; |
99c41515 | 3669 | int status = 0; |
1da177e4 | 3670 | |
fe0750e5 | 3671 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3672 | open->op_recall = 0; |
3673 | switch (open->op_claim_type) { | |
3674 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3675 | if (!cb_up) |
7b190fec | 3676 | open->op_recall = 1; |
99c41515 BF |
3677 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3678 | goto out_no_deleg; | |
7b190fec N |
3679 | break; |
3680 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3681 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3682 | /* |
3683 | * Let's not give out any delegations till everyone's | |
3684 | * had the chance to reclaim theirs.... | |
3685 | */ | |
4cf59221 | 3686 | if (locks_in_grace(clp->net)) |
99c41515 | 3687 | goto out_no_deleg; |
dad1c067 | 3688 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3689 | goto out_no_deleg; |
9a0590ae SD |
3690 | /* |
3691 | * Also, if the file was opened for write or | |
3692 | * create, there's a good chance the client's | |
3693 | * about to write to it, resulting in an | |
3694 | * immediate recall (since we don't support | |
3695 | * write delegations): | |
3696 | */ | |
7b190fec | 3697 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3698 | goto out_no_deleg; |
3699 | if (open->op_create == NFS4_OPEN_CREATE) | |
3700 | goto out_no_deleg; | |
7b190fec N |
3701 | break; |
3702 | default: | |
99c41515 | 3703 | goto out_no_deleg; |
7b190fec | 3704 | } |
11b9164a | 3705 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3706 | if (IS_ERR(dp)) |
dd239cc0 | 3707 | goto out_no_deleg; |
1da177e4 | 3708 | |
d5477a8d | 3709 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3710 | |
8c10cbdb | 3711 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3712 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3713 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3714 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3715 | return; |
dd239cc0 | 3716 | out_no_deleg: |
99c41515 BF |
3717 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3718 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3719 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3720 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3721 | open->op_recall = 1; |
3722 | } | |
99c41515 BF |
3723 | |
3724 | /* 4.1 client asking for a delegation? */ | |
3725 | if (open->op_deleg_want) | |
3726 | nfsd4_open_deleg_none_ext(open, status); | |
3727 | return; | |
1da177e4 LT |
3728 | } |
3729 | ||
e27f49c3 BH |
3730 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3731 | struct nfs4_delegation *dp) | |
3732 | { | |
3733 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3734 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3735 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3736 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3737 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3738 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3739 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3740 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3741 | } | |
3742 | /* Otherwise the client must be confused wanting a delegation | |
3743 | * it already has, therefore we don't return | |
3744 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3745 | */ | |
3746 | } | |
3747 | ||
1da177e4 LT |
3748 | /* |
3749 | * called with nfs4_lock_state() held. | |
3750 | */ | |
b37ad28b | 3751 | __be32 |
1da177e4 LT |
3752 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3753 | { | |
6668958f | 3754 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3755 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3756 | struct nfs4_file *fp = NULL; |
dcef0413 | 3757 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3758 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3759 | __be32 status; |
1da177e4 | 3760 | |
1da177e4 LT |
3761 | /* |
3762 | * Lookup file; if found, lookup stateid and check open request, | |
3763 | * and check for delegations in the process of being recalled. | |
3764 | * If not found, create the nfs4_file struct | |
3765 | */ | |
f9c00c3a | 3766 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3767 | if (fp != open->op_file) { |
41d22663 | 3768 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3769 | if (status) |
3770 | goto out; | |
a46cb7f2 | 3771 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3772 | } else { |
950e0118 | 3773 | open->op_file = NULL; |
c44c5eeb | 3774 | status = nfserr_bad_stateid; |
8b289b2c | 3775 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3776 | goto out; |
3e772463 | 3777 | status = nfserr_jukebox; |
1da177e4 LT |
3778 | } |
3779 | ||
3780 | /* | |
3781 | * OPEN the file, or upgrade an existing OPEN. | |
3782 | * If truncate fails, the OPEN fails. | |
3783 | */ | |
3784 | if (stp) { | |
3785 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3786 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3787 | if (status) |
3788 | goto out; | |
3789 | } else { | |
4cdc951b BF |
3790 | stp = open->op_stp; |
3791 | open->op_stp = NULL; | |
996e0938 | 3792 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3793 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3794 | if (status) { | |
3795 | release_open_stateid(stp); | |
3796 | goto out; | |
3797 | } | |
1da177e4 | 3798 | } |
dcef0413 BF |
3799 | update_stateid(&stp->st_stid.sc_stateid); |
3800 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3801 | |
d24433cd | 3802 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3803 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3804 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3805 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3806 | goto nodeleg; | |
3807 | } | |
3808 | } | |
3809 | ||
1da177e4 LT |
3810 | /* |
3811 | * Attempt to hand out a delegation. No error return, because the | |
3812 | * OPEN succeeds even if we fail. | |
3813 | */ | |
4cf59221 | 3814 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3815 | nodeleg: |
1da177e4 LT |
3816 | status = nfs_ok; |
3817 | ||
8c10cbdb | 3818 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3819 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3820 | out: |
d24433cd BH |
3821 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3822 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3823 | open->op_deleg_want) |
3824 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3825 | |
13cd2184 N |
3826 | if (fp) |
3827 | put_nfs4_file(fp); | |
37515177 | 3828 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3829 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3830 | /* |
3831 | * To finish the open response, we just need to set the rflags. | |
3832 | */ | |
3833 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3834 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3835 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 3836 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
3837 | if (dp) |
3838 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
3839 | |
3840 | return status; | |
3841 | } | |
3842 | ||
d29b20cd BF |
3843 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3844 | { | |
3845 | if (open->op_openowner) { | |
3846 | struct nfs4_openowner *oo = open->op_openowner; | |
3847 | ||
3848 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3849 | list_del_init(&oo->oo_close_lru); | |
3850 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3851 | if (status) { | |
3852 | release_openowner(oo); | |
3853 | open->op_openowner = NULL; | |
3854 | } else | |
3855 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3856 | } | |
3857 | } | |
32513b40 BF |
3858 | if (open->op_file) |
3859 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3860 | if (open->op_stp) |
6011695d | 3861 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
3862 | } |
3863 | ||
b37ad28b | 3864 | __be32 |
b591480b BF |
3865 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3866 | clientid_t *clid) | |
1da177e4 LT |
3867 | { |
3868 | struct nfs4_client *clp; | |
b37ad28b | 3869 | __be32 status; |
7f2210fa | 3870 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3871 | |
3872 | nfs4_lock_state(); | |
3873 | dprintk("process_renew(%08x/%08x): starting\n", | |
3874 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3875 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3876 | if (status) |
1da177e4 | 3877 | goto out; |
4b24ca7d | 3878 | clp = cstate->clp; |
1da177e4 | 3879 | status = nfserr_cb_path_down; |
ea1da636 | 3880 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3881 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3882 | goto out; |
3883 | status = nfs_ok; | |
3884 | out: | |
3885 | nfs4_unlock_state(); | |
3886 | return status; | |
3887 | } | |
3888 | ||
a76b4319 | 3889 | static void |
12760c66 | 3890 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3891 | { |
33dcc481 | 3892 | /* do nothing if grace period already ended */ |
a51c84ed | 3893 | if (nn->grace_ended) |
33dcc481 JL |
3894 | return; |
3895 | ||
a76b4319 | 3896 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3897 | nn->grace_ended = true; |
12760c66 | 3898 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3899 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3900 | /* |
3901 | * Now that every NFSv4 client has had the chance to recover and | |
3902 | * to see the (possibly new, possibly shorter) lease time, we | |
3903 | * can safely set the next grace time to the current lease time: | |
3904 | */ | |
5284b44e | 3905 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3906 | } |
3907 | ||
fd39ca9a | 3908 | static time_t |
09121281 | 3909 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3910 | { |
3911 | struct nfs4_client *clp; | |
fe0750e5 | 3912 | struct nfs4_openowner *oo; |
1da177e4 LT |
3913 | struct nfs4_delegation *dp; |
3914 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3915 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3916 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3917 | |
3918 | nfs4_lock_state(); | |
3919 | ||
3920 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3921 | nfsd4_end_grace(nn); |
36acb66b | 3922 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3923 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3924 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3925 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3926 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3927 | t = clp->cl_time - cutoff; | |
a832e7ae | 3928 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3929 | break; |
3930 | } | |
221a6876 | 3931 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3932 | dprintk("NFSD: client in use (clientid %08x)\n", |
3933 | clp->cl_clientid.cl_id); | |
3934 | continue; | |
3935 | } | |
221a6876 | 3936 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3937 | } |
c9a49628 | 3938 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3939 | list_for_each_safe(pos, next, &reaplist) { |
3940 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3941 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3942 | clp->cl_clientid.cl_id); | |
3943 | expire_client(clp); | |
3944 | } | |
cdc97505 | 3945 | spin_lock(&state_lock); |
e8c69d17 | 3946 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3947 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3948 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3949 | continue; | |
1da177e4 | 3950 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3951 | t = dp->dl_time - cutoff; |
3952 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3953 | break; |
3954 | } | |
42690676 JL |
3955 | unhash_delegation_locked(dp); |
3956 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 3957 | } |
cdc97505 | 3958 | spin_unlock(&state_lock); |
2d4a532d JL |
3959 | while (!list_empty(&reaplist)) { |
3960 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
3961 | dl_recall_lru); | |
3962 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 3963 | revoke_delegation(dp); |
1da177e4 | 3964 | } |
73758fed | 3965 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3966 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3967 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3968 | t = oo->oo_time - cutoff; |
3969 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3970 | break; |
3971 | } | |
fe0750e5 | 3972 | release_openowner(oo); |
1da177e4 | 3973 | } |
a832e7ae | 3974 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3975 | nfs4_unlock_state(); |
a832e7ae | 3976 | return new_timeo; |
1da177e4 LT |
3977 | } |
3978 | ||
a254b246 HH |
3979 | static struct workqueue_struct *laundry_wq; |
3980 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3981 | |
3982 | static void | |
09121281 | 3983 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3984 | { |
3985 | time_t t; | |
09121281 SK |
3986 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3987 | work); | |
3988 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3989 | laundromat_work); | |
1da177e4 | 3990 | |
09121281 | 3991 | t = nfs4_laundromat(nn); |
1da177e4 | 3992 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3993 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3994 | } |
3995 | ||
f7a4d872 | 3996 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3997 | { |
11b9164a | 3998 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
3999 | return nfserr_bad_stateid; |
4000 | return nfs_ok; | |
1da177e4 LT |
4001 | } |
4002 | ||
1da177e4 | 4003 | static inline int |
82c5ff1b | 4004 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4005 | { |
82c5ff1b JL |
4006 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4007 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4008 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4009 | } |
4010 | ||
4011 | static inline int | |
82c5ff1b | 4012 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4013 | { |
82c5ff1b JL |
4014 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4015 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4016 | } |
4017 | ||
4018 | static | |
dcef0413 | 4019 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4020 | { |
b37ad28b | 4021 | __be32 status = nfserr_openmode; |
1da177e4 | 4022 | |
02921914 BF |
4023 | /* For lock stateid's, we test the parent open, not the lock: */ |
4024 | if (stp->st_openstp) | |
4025 | stp = stp->st_openstp; | |
82c5ff1b | 4026 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4027 | goto out; |
82c5ff1b | 4028 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4029 | goto out; |
4030 | status = nfs_ok; | |
4031 | out: | |
4032 | return status; | |
4033 | } | |
4034 | ||
b37ad28b | 4035 | static inline __be32 |
5ccb0066 | 4036 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4037 | { |
203a8c8e | 4038 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4039 | return nfs_ok; |
5ccb0066 | 4040 | else if (locks_in_grace(net)) { |
25985edc | 4041 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4042 | * conflicting state; so we must wait out the grace period. */ |
4043 | return nfserr_grace; | |
4044 | } else if (flags & WR_STATE) | |
4045 | return nfs4_share_conflict(current_fh, | |
4046 | NFS4_SHARE_DENY_WRITE); | |
4047 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4048 | return nfs4_share_conflict(current_fh, | |
4049 | NFS4_SHARE_DENY_READ); | |
4050 | } | |
4051 | ||
4052 | /* | |
4053 | * Allow READ/WRITE during grace period on recovered state only for files | |
4054 | * that are not able to provide mandatory locking. | |
4055 | */ | |
4056 | static inline int | |
5ccb0066 | 4057 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4058 | { |
5ccb0066 | 4059 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4060 | } |
4061 | ||
81b82965 BF |
4062 | /* Returns true iff a is later than b: */ |
4063 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4064 | { | |
1a9357f4 | 4065 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4066 | } |
4067 | ||
57b7b43b | 4068 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4069 | { |
6668958f AA |
4070 | /* |
4071 | * When sessions are used the stateid generation number is ignored | |
4072 | * when it is zero. | |
4073 | */ | |
28dde241 | 4074 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4075 | return nfs_ok; |
4076 | ||
4077 | if (in->si_generation == ref->si_generation) | |
4078 | return nfs_ok; | |
6668958f | 4079 | |
0836f587 | 4080 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4081 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4082 | return nfserr_bad_stateid; |
4083 | /* | |
81b82965 BF |
4084 | * However, we could see a stateid from the past, even from a |
4085 | * non-buggy client. For example, if the client sends a lock | |
4086 | * while some IO is outstanding, the lock may bump si_generation | |
4087 | * while the IO is still in flight. The client could avoid that | |
4088 | * situation by waiting for responses on all the IO requests, | |
4089 | * but better performance may result in retrying IO that | |
4090 | * receives an old_stateid error if requests are rarely | |
4091 | * reordered in flight: | |
0836f587 | 4092 | */ |
81b82965 | 4093 | return nfserr_old_stateid; |
0836f587 BF |
4094 | } |
4095 | ||
7df302f7 | 4096 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4097 | { |
97b7e3b6 BF |
4098 | struct nfs4_stid *s; |
4099 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4100 | __be32 status = nfserr_bad_stateid; |
17456804 | 4101 | |
7df302f7 | 4102 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4103 | return status; |
7df302f7 CL |
4104 | /* Client debugging aid. */ |
4105 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4106 | char addr_str[INET6_ADDRSTRLEN]; | |
4107 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4108 | sizeof(addr_str)); | |
4109 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4110 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4111 | return status; |
7df302f7 | 4112 | } |
1af71cc8 JL |
4113 | spin_lock(&cl->cl_lock); |
4114 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4115 | if (!s) |
1af71cc8 | 4116 | goto out_unlock; |
36279ac1 | 4117 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4118 | if (status) |
1af71cc8 | 4119 | goto out_unlock; |
23340032 BF |
4120 | switch (s->sc_type) { |
4121 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4122 | status = nfs_ok; |
4123 | break; | |
3bd64a5b | 4124 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4125 | status = nfserr_deleg_revoked; |
4126 | break; | |
23340032 BF |
4127 | case NFS4_OPEN_STID: |
4128 | case NFS4_LOCK_STID: | |
4129 | ols = openlockstateid(s); | |
4130 | if (ols->st_stateowner->so_is_open_owner | |
4131 | && !(openowner(ols->st_stateowner)->oo_flags | |
4132 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4133 | status = nfserr_bad_stateid; |
4134 | else | |
4135 | status = nfs_ok; | |
4136 | break; | |
23340032 BF |
4137 | default: |
4138 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4139 | /* Fallthrough */ |
23340032 | 4140 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4141 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4142 | status = nfserr_bad_stateid; |
23340032 | 4143 | } |
1af71cc8 JL |
4144 | out_unlock: |
4145 | spin_unlock(&cl->cl_lock); | |
4146 | return status; | |
17456804 BS |
4147 | } |
4148 | ||
2dd6e458 TM |
4149 | static __be32 |
4150 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4151 | stateid_t *stateid, unsigned char typemask, | |
4152 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4153 | { |
0eb6f20a | 4154 | __be32 status; |
38c2f4b1 BF |
4155 | |
4156 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4157 | return nfserr_bad_stateid; | |
4b24ca7d | 4158 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4159 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4160 | if (cstate->session) |
a8a7c677 | 4161 | return nfserr_bad_stateid; |
38c2f4b1 | 4162 | return nfserr_stale_stateid; |
a8a7c677 | 4163 | } |
0eb6f20a BF |
4164 | if (status) |
4165 | return status; | |
4b24ca7d | 4166 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4167 | if (!*s) |
4168 | return nfserr_bad_stateid; | |
4169 | return nfs_ok; | |
38c2f4b1 BF |
4170 | } |
4171 | ||
1da177e4 LT |
4172 | /* |
4173 | * Checks for stateid operations | |
4174 | */ | |
b37ad28b | 4175 | __be32 |
5ccb0066 | 4176 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4177 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4178 | { |
69064a27 | 4179 | struct nfs4_stid *s; |
dcef0413 | 4180 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4181 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4182 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4183 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4184 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4185 | struct file *file = NULL; |
b37ad28b | 4186 | __be32 status; |
1da177e4 | 4187 | |
1da177e4 LT |
4188 | if (filpp) |
4189 | *filpp = NULL; | |
4190 | ||
5ccb0066 | 4191 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4192 | return nfserr_grace; |
4193 | ||
4194 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4195 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4196 | |
14bcab1a TM |
4197 | nfs4_lock_state(); |
4198 | ||
2dd6e458 | 4199 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4200 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4201 | &s, nn); |
38c2f4b1 | 4202 | if (status) |
14bcab1a | 4203 | goto out; |
69064a27 BF |
4204 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4205 | if (status) | |
4206 | goto out; | |
f7a4d872 BF |
4207 | switch (s->sc_type) { |
4208 | case NFS4_DELEG_STID: | |
69064a27 | 4209 | dp = delegstateid(s); |
dc9bf700 BF |
4210 | status = nfs4_check_delegmode(dp, flags); |
4211 | if (status) | |
4212 | goto out; | |
43b0178e | 4213 | if (filpp) { |
11b9164a | 4214 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4215 | if (!file) { |
063b0fb9 BF |
4216 | WARN_ON_ONCE(1); |
4217 | status = nfserr_serverfault; | |
4218 | goto out; | |
4219 | } | |
de18643d | 4220 | get_file(file); |
43b0178e | 4221 | } |
f7a4d872 BF |
4222 | break; |
4223 | case NFS4_OPEN_STID: | |
4224 | case NFS4_LOCK_STID: | |
69064a27 | 4225 | stp = openlockstateid(s); |
f7a4d872 BF |
4226 | status = nfs4_check_fh(current_fh, stp); |
4227 | if (status) | |
1da177e4 | 4228 | goto out; |
fe0750e5 | 4229 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4230 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4231 | goto out; |
a4455be0 BF |
4232 | status = nfs4_check_openmode(stp, flags); |
4233 | if (status) | |
1da177e4 | 4234 | goto out; |
f9d7562f | 4235 | if (filpp) { |
11b9164a TM |
4236 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4237 | ||
f9d7562f | 4238 | if (flags & RD_STATE) |
11b9164a | 4239 | file = find_readable_file(fp); |
f9d7562f | 4240 | else |
11b9164a | 4241 | file = find_writeable_file(fp); |
f9d7562f | 4242 | } |
f7a4d872 BF |
4243 | break; |
4244 | default: | |
14bcab1a TM |
4245 | status = nfserr_bad_stateid; |
4246 | goto out; | |
1da177e4 LT |
4247 | } |
4248 | status = nfs_ok; | |
14bcab1a | 4249 | if (file) |
de18643d | 4250 | *filpp = file; |
1da177e4 | 4251 | out: |
14bcab1a | 4252 | nfs4_unlock_state(); |
1da177e4 LT |
4253 | return status; |
4254 | } | |
4255 | ||
e1ca12df | 4256 | static __be32 |
dcef0413 | 4257 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4258 | { |
a1b8ff4c BF |
4259 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4260 | ||
11b9164a | 4261 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
e1ca12df | 4262 | return nfserr_locks_held; |
c53530da | 4263 | release_lockowner_if_empty(lo); |
e1ca12df BS |
4264 | return nfs_ok; |
4265 | } | |
4266 | ||
17456804 BS |
4267 | /* |
4268 | * Test if the stateid is valid | |
4269 | */ | |
4270 | __be32 | |
4271 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4272 | struct nfsd4_test_stateid *test_stateid) | |
4273 | { | |
03cfb420 BS |
4274 | struct nfsd4_test_stateid_id *stateid; |
4275 | struct nfs4_client *cl = cstate->session->se_client; | |
4276 | ||
4277 | nfs4_lock_state(); | |
4278 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4279 | stateid->ts_id_status = |
4280 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4281 | nfs4_unlock_state(); |
4282 | ||
17456804 BS |
4283 | return nfs_ok; |
4284 | } | |
4285 | ||
e1ca12df BS |
4286 | __be32 |
4287 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4288 | struct nfsd4_free_stateid *free_stateid) | |
4289 | { | |
4290 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4291 | struct nfs4_stid *s; |
3bd64a5b | 4292 | struct nfs4_delegation *dp; |
38c2f4b1 | 4293 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4294 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4295 | |
4296 | nfs4_lock_state(); | |
1af71cc8 JL |
4297 | spin_lock(&cl->cl_lock); |
4298 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4299 | if (!s) |
1af71cc8 | 4300 | goto out_unlock; |
2da1cec7 BF |
4301 | switch (s->sc_type) { |
4302 | case NFS4_DELEG_STID: | |
e1ca12df | 4303 | ret = nfserr_locks_held; |
1af71cc8 | 4304 | break; |
2da1cec7 | 4305 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4306 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4307 | if (ret) | |
1af71cc8 JL |
4308 | break; |
4309 | ret = nfserr_locks_held; | |
f7a4d872 | 4310 | break; |
1af71cc8 JL |
4311 | case NFS4_LOCK_STID: |
4312 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4313 | if (ret) | |
4314 | break; | |
4315 | spin_unlock(&cl->cl_lock); | |
4316 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4317 | goto out; | |
3bd64a5b BF |
4318 | case NFS4_REVOKED_DELEG_STID: |
4319 | dp = delegstateid(s); | |
2d4a532d JL |
4320 | list_del_init(&dp->dl_recall_lru); |
4321 | spin_unlock(&cl->cl_lock); | |
6011695d | 4322 | nfs4_put_stid(s); |
3bd64a5b | 4323 | ret = nfs_ok; |
1af71cc8 JL |
4324 | goto out; |
4325 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4326 | } |
1af71cc8 JL |
4327 | out_unlock: |
4328 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4329 | out: |
4330 | nfs4_unlock_state(); | |
4331 | return ret; | |
4332 | } | |
4333 | ||
4c4cd222 N |
4334 | static inline int |
4335 | setlkflg (int type) | |
4336 | { | |
4337 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4338 | RD_STATE : WR_STATE; | |
4339 | } | |
1da177e4 | 4340 | |
dcef0413 | 4341 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4342 | { |
4343 | struct svc_fh *current_fh = &cstate->current_fh; | |
4344 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4345 | __be32 status; | |
4346 | ||
c0a5d93e BF |
4347 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4348 | if (status) | |
4349 | return status; | |
3bd64a5b BF |
4350 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4351 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4352 | /* |
4353 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4354 | * nfserr_replay_me from the previous step, and |
4355 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4356 | */ |
4357 | return nfserr_bad_stateid; | |
4358 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4359 | if (status) | |
4360 | return status; | |
4361 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4362 | } |
4363 | ||
1da177e4 LT |
4364 | /* |
4365 | * Checks for sequence id mutating operations. | |
4366 | */ | |
b37ad28b | 4367 | static __be32 |
dd453dfd | 4368 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4369 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4370 | struct nfs4_ol_stateid **stpp, |
4371 | struct nfsd_net *nn) | |
1da177e4 | 4372 | { |
0836f587 | 4373 | __be32 status; |
38c2f4b1 | 4374 | struct nfs4_stid *s; |
e17f99b7 | 4375 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4376 | |
8c10cbdb BH |
4377 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4378 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4379 | |
1da177e4 | 4380 | *stpp = NULL; |
2dd6e458 | 4381 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4382 | if (status) |
4383 | return status; | |
e17f99b7 | 4384 | stp = openlockstateid(s); |
3d74e6a5 | 4385 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4386 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4387 | |
e17f99b7 TM |
4388 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4389 | if (!status) | |
4390 | *stpp = stp; | |
4391 | return status; | |
c0a5d93e | 4392 | } |
39325bd0 | 4393 | |
3320fef1 SK |
4394 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4395 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4396 | { |
4397 | __be32 status; | |
4398 | struct nfs4_openowner *oo; | |
1da177e4 | 4399 | |
c0a5d93e | 4400 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4401 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4402 | if (status) |
4403 | return status; | |
c0a5d93e | 4404 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4405 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4406 | return nfserr_bad_stateid; |
3a4f98bb | 4407 | return nfs_ok; |
1da177e4 LT |
4408 | } |
4409 | ||
b37ad28b | 4410 | __be32 |
ca364317 | 4411 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4412 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4413 | { |
b37ad28b | 4414 | __be32 status; |
fe0750e5 | 4415 | struct nfs4_openowner *oo; |
dcef0413 | 4416 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4417 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4418 | |
a6a9f18f AV |
4419 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4420 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4421 | |
ca364317 | 4422 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4423 | if (status) |
4424 | return status; | |
1da177e4 LT |
4425 | |
4426 | nfs4_lock_state(); | |
4427 | ||
9072d5c6 | 4428 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4429 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4430 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4431 | if (status) |
68b66e82 | 4432 | goto out; |
fe0750e5 | 4433 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4434 | status = nfserr_bad_stateid; |
dad1c067 | 4435 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4436 | goto out; |
dad1c067 | 4437 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4438 | update_stateid(&stp->st_stid.sc_stateid); |
4439 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4440 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4441 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4442 | |
2a4317c5 | 4443 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4444 | status = nfs_ok; |
1da177e4 | 4445 | out: |
9411b1d4 | 4446 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4447 | if (!cstate->replay_owner) |
4448 | nfs4_unlock_state(); | |
1da177e4 LT |
4449 | return status; |
4450 | } | |
4451 | ||
6409a5a6 | 4452 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4453 | { |
82c5ff1b | 4454 | if (!test_access(access, stp)) |
6409a5a6 | 4455 | return; |
11b9164a | 4456 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4457 | clear_access(access, stp); |
6409a5a6 | 4458 | } |
f197c271 | 4459 | |
6409a5a6 BF |
4460 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4461 | { | |
4462 | switch (to_access) { | |
4463 | case NFS4_SHARE_ACCESS_READ: | |
4464 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4465 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4466 | break; | |
4467 | case NFS4_SHARE_ACCESS_WRITE: | |
4468 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4469 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4470 | break; | |
4471 | case NFS4_SHARE_ACCESS_BOTH: | |
4472 | break; | |
4473 | default: | |
063b0fb9 | 4474 | WARN_ON_ONCE(1); |
1da177e4 LT |
4475 | } |
4476 | } | |
4477 | ||
b37ad28b | 4478 | __be32 |
ca364317 BF |
4479 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4480 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4481 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4482 | { |
b37ad28b | 4483 | __be32 status; |
dcef0413 | 4484 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4485 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4486 | |
a6a9f18f AV |
4487 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4488 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4489 | |
c30e92df | 4490 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4491 | if (od->od_deleg_want) |
4492 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4493 | od->od_deleg_want); | |
1da177e4 LT |
4494 | |
4495 | nfs4_lock_state(); | |
c0a5d93e | 4496 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4497 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4498 | if (status) |
1da177e4 | 4499 | goto out; |
1da177e4 | 4500 | status = nfserr_inval; |
82c5ff1b | 4501 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4502 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 LT |
4503 | stp->st_access_bmap, od->od_share_access); |
4504 | goto out; | |
4505 | } | |
ce0fc43c | 4506 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4507 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 LT |
4508 | stp->st_deny_bmap, od->od_share_deny); |
4509 | goto out; | |
4510 | } | |
6409a5a6 | 4511 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4512 | |
ce0fc43c | 4513 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4514 | |
dcef0413 BF |
4515 | update_stateid(&stp->st_stid.sc_stateid); |
4516 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4517 | status = nfs_ok; |
4518 | out: | |
9411b1d4 | 4519 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4520 | if (!cstate->replay_owner) |
4521 | nfs4_unlock_state(); | |
1da177e4 LT |
4522 | return status; |
4523 | } | |
4524 | ||
f7a4d872 BF |
4525 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4526 | { | |
acf9295b TM |
4527 | struct nfs4_client *clp = s->st_stid.sc_client; |
4528 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4529 | ||
f7a4d872 | 4530 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4531 | unhash_open_stateid(s); |
4532 | ||
4533 | if (clp->cl_minorversion) { | |
acf9295b TM |
4534 | if (list_empty(&oo->oo_owner.so_stateids)) |
4535 | release_openowner(oo); | |
6011695d | 4536 | nfs4_put_stid(&s->st_stid); |
acf9295b | 4537 | } else { |
6011695d TM |
4538 | /* |
4539 | * In the 4.0 case we need to keep the owners around a | |
4540 | * little while to handle CLOSE replay. We still do need | |
4541 | * to release any file access that is held by them | |
4542 | * before returning however. | |
4543 | */ | |
4544 | release_all_access(s); | |
11b9164a TM |
4545 | if (s->st_stid.sc_file) { |
4546 | put_nfs4_file(s->st_stid.sc_file); | |
4547 | s->st_stid.sc_file = NULL; | |
f8338834 | 4548 | } |
acf9295b | 4549 | oo->oo_last_closed_stid = s; |
acf9295b TM |
4550 | if (list_empty(&oo->oo_owner.so_stateids)) |
4551 | move_to_close_lru(oo, clp->net); | |
4552 | } | |
38c387b5 BF |
4553 | } |
4554 | ||
1da177e4 LT |
4555 | /* |
4556 | * nfs4_unlock_state() called after encode | |
4557 | */ | |
b37ad28b | 4558 | __be32 |
ca364317 | 4559 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4560 | struct nfsd4_close *close) |
1da177e4 | 4561 | { |
b37ad28b | 4562 | __be32 status; |
dcef0413 | 4563 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4564 | struct net *net = SVC_NET(rqstp); |
4565 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4566 | |
a6a9f18f AV |
4567 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4568 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4569 | |
4570 | nfs4_lock_state(); | |
f7a4d872 BF |
4571 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4572 | &close->cl_stateid, | |
4573 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4574 | &stp, nn); |
9411b1d4 | 4575 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4576 | if (status) |
1da177e4 | 4577 | goto out; |
dcef0413 BF |
4578 | update_stateid(&stp->st_stid.sc_stateid); |
4579 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4580 | |
f7a4d872 | 4581 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4582 | out: |
5ec094c1 BF |
4583 | if (!cstate->replay_owner) |
4584 | nfs4_unlock_state(); | |
1da177e4 LT |
4585 | return status; |
4586 | } | |
4587 | ||
b37ad28b | 4588 | __be32 |
ca364317 BF |
4589 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4590 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4591 | { |
203a8c8e BF |
4592 | struct nfs4_delegation *dp; |
4593 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4594 | struct nfs4_stid *s; |
b37ad28b | 4595 | __be32 status; |
3320fef1 | 4596 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4597 | |
ca364317 | 4598 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4599 | return status; |
1da177e4 LT |
4600 | |
4601 | nfs4_lock_state(); | |
2dd6e458 | 4602 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4603 | if (status) |
203a8c8e | 4604 | goto out; |
38c2f4b1 | 4605 | dp = delegstateid(s); |
d5477a8d | 4606 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4607 | if (status) |
4608 | goto out; | |
203a8c8e | 4609 | |
3bd64a5b | 4610 | destroy_delegation(dp); |
1da177e4 | 4611 | out: |
203a8c8e BF |
4612 | nfs4_unlock_state(); |
4613 | ||
1da177e4 LT |
4614 | return status; |
4615 | } | |
4616 | ||
4617 | ||
1da177e4 | 4618 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4619 | |
87df4de8 BH |
4620 | static inline u64 |
4621 | end_offset(u64 start, u64 len) | |
4622 | { | |
4623 | u64 end; | |
4624 | ||
4625 | end = start + len; | |
4626 | return end >= start ? end: NFS4_MAX_UINT64; | |
4627 | } | |
4628 | ||
4629 | /* last octet in a range */ | |
4630 | static inline u64 | |
4631 | last_byte_offset(u64 start, u64 len) | |
4632 | { | |
4633 | u64 end; | |
4634 | ||
063b0fb9 | 4635 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4636 | end = start + len; |
4637 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4638 | } | |
4639 | ||
1da177e4 LT |
4640 | /* |
4641 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4642 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4643 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4644 | * locking, this prevents us from being completely protocol-compliant. The | |
4645 | * real solution to this problem is to start using unsigned file offsets in | |
4646 | * the VFS, but this is a very deep change! | |
4647 | */ | |
4648 | static inline void | |
4649 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4650 | { | |
4651 | if (lock->fl_start < 0) | |
4652 | lock->fl_start = OFFSET_MAX; | |
4653 | if (lock->fl_end < 0) | |
4654 | lock->fl_end = OFFSET_MAX; | |
4655 | } | |
4656 | ||
d5b9026a N |
4657 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4658 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4659 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4660 | }; |
1da177e4 LT |
4661 | |
4662 | static inline void | |
4663 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4664 | { | |
fe0750e5 | 4665 | struct nfs4_lockowner *lo; |
1da177e4 | 4666 | |
d5b9026a | 4667 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4668 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4669 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4670 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4671 | if (!deny->ld_owner.data) |
4672 | /* We just don't care that much */ | |
4673 | goto nevermind; | |
fe0750e5 BF |
4674 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4675 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4676 | } else { |
7c13f344 BF |
4677 | nevermind: |
4678 | deny->ld_owner.len = 0; | |
4679 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4680 | deny->ld_clientid.cl_boot = 0; |
4681 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4682 | } |
4683 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4684 | deny->ld_length = NFS4_MAX_UINT64; |
4685 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4686 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4687 | deny->ld_type = NFS4_READ_LT; | |
4688 | if (fl->fl_type != F_RDLCK) | |
4689 | deny->ld_type = NFS4_WRITE_LT; | |
4690 | } | |
4691 | ||
fe0750e5 | 4692 | static struct nfs4_lockowner * |
b3c32bcd TM |
4693 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4694 | struct nfsd_net *nn) | |
1da177e4 | 4695 | { |
b3c32bcd TM |
4696 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4697 | struct nfs4_stateowner *so; | |
1da177e4 | 4698 | |
b3c32bcd TM |
4699 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4700 | if (so->so_is_open_owner) | |
4701 | continue; | |
4702 | if (!same_owner_str(so, owner, clid)) | |
4703 | continue; | |
4704 | return lockowner(so); | |
1da177e4 LT |
4705 | } |
4706 | return NULL; | |
4707 | } | |
4708 | ||
4709 | /* | |
4710 | * Alloc a lock owner structure. | |
4711 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4712 | * occurred. |
1da177e4 | 4713 | * |
16bfdaaf | 4714 | * strhashval = ownerstr_hashval |
1da177e4 | 4715 | */ |
fe0750e5 | 4716 | static struct nfs4_lockowner * |
dcef0413 | 4717 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4718 | struct nfs4_lockowner *lo; |
b3c32bcd | 4719 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4720 | |
fe0750e5 BF |
4721 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4722 | if (!lo) | |
1da177e4 | 4723 | return NULL; |
fe0750e5 BF |
4724 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4725 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4726 | /* It is the openowner seqid that will be incremented in encode in the |
4727 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4728 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4729 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4730 | return lo; |
1da177e4 LT |
4731 | } |
4732 | ||
356a95ec JL |
4733 | static void |
4734 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4735 | struct nfs4_file *fp, struct inode *inode, | |
4736 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4737 | { |
d3b313a4 | 4738 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4739 | |
356a95ec JL |
4740 | lockdep_assert_held(&clp->cl_lock); |
4741 | ||
3d0fabd5 | 4742 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4743 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 4744 | stp->st_stateowner = &lo->lo_owner; |
13cd2184 | 4745 | get_nfs4_file(fp); |
11b9164a | 4746 | stp->st_stid.sc_file = fp; |
b49e084d | 4747 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4748 | stp->st_access_bmap = 0; |
1da177e4 | 4749 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4750 | stp->st_openstp = open_stp; |
3c87b9b7 | 4751 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 4752 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
4753 | spin_lock(&fp->fi_lock); |
4754 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4755 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4756 | } |
4757 | ||
c53530da JL |
4758 | static struct nfs4_ol_stateid * |
4759 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4760 | { | |
4761 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
4762 | struct nfs4_client *clp = lo->lo_owner.so_client; |
4763 | ||
4764 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
4765 | |
4766 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
4767 | if (lst->st_stid.sc_file == fp) { |
4768 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 4769 | return lst; |
3d0fabd5 | 4770 | } |
c53530da JL |
4771 | } |
4772 | return NULL; | |
4773 | } | |
4774 | ||
356a95ec JL |
4775 | static struct nfs4_ol_stateid * |
4776 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
4777 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
4778 | bool *new) | |
4779 | { | |
4780 | struct nfs4_stid *ns = NULL; | |
4781 | struct nfs4_ol_stateid *lst; | |
4782 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4783 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
4784 | ||
4785 | spin_lock(&clp->cl_lock); | |
4786 | lst = find_lock_stateid(lo, fi); | |
4787 | if (lst == NULL) { | |
4788 | spin_unlock(&clp->cl_lock); | |
4789 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
4790 | if (ns == NULL) | |
4791 | return NULL; | |
4792 | ||
4793 | spin_lock(&clp->cl_lock); | |
4794 | lst = find_lock_stateid(lo, fi); | |
4795 | if (likely(!lst)) { | |
4796 | lst = openlockstateid(ns); | |
4797 | init_lock_stateid(lst, lo, fi, inode, ost); | |
4798 | ns = NULL; | |
4799 | *new = true; | |
4800 | } | |
4801 | } | |
4802 | spin_unlock(&clp->cl_lock); | |
4803 | if (ns) | |
4804 | nfs4_put_stid(ns); | |
4805 | return lst; | |
4806 | } | |
c53530da | 4807 | |
fd39ca9a | 4808 | static int |
1da177e4 LT |
4809 | check_lock_length(u64 offset, u64 length) |
4810 | { | |
87df4de8 | 4811 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4812 | LOFF_OVERFLOW(offset, length))); |
4813 | } | |
4814 | ||
dcef0413 | 4815 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 4816 | { |
11b9164a | 4817 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 4818 | |
7214e860 JL |
4819 | lockdep_assert_held(&fp->fi_lock); |
4820 | ||
82c5ff1b | 4821 | if (test_access(access, lock_stp)) |
0997b173 | 4822 | return; |
12659651 | 4823 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4824 | set_access(access, lock_stp); |
0997b173 BF |
4825 | } |
4826 | ||
356a95ec JL |
4827 | static __be32 |
4828 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
4829 | struct nfs4_ol_stateid *ost, | |
4830 | struct nfsd4_lock *lock, | |
4831 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 4832 | { |
11b9164a | 4833 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
4834 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
4835 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 4836 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
4837 | struct nfs4_lockowner *lo; |
4838 | unsigned int strhashval; | |
20e9e2bc | 4839 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4840 | |
b3c32bcd | 4841 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4842 | if (!lo) { |
4843 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4844 | &lock->v.new.owner); | |
4845 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4846 | if (lo == NULL) | |
4847 | return nfserr_jukebox; | |
4848 | } else { | |
4849 | /* with an existing lockowner, seqids must be the same */ | |
4850 | if (!cstate->minorversion && | |
4851 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4852 | return nfserr_bad_seqid; |
64a284d0 | 4853 | } |
c53530da | 4854 | |
356a95ec | 4855 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 4856 | if (*lst == NULL) { |
356a95ec JL |
4857 | release_lockowner_if_empty(lo); |
4858 | return nfserr_jukebox; | |
64a284d0 | 4859 | } |
64a284d0 BF |
4860 | return nfs_ok; |
4861 | } | |
4862 | ||
1da177e4 LT |
4863 | /* |
4864 | * LOCK operation | |
4865 | */ | |
b37ad28b | 4866 | __be32 |
ca364317 | 4867 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4868 | struct nfsd4_lock *lock) |
1da177e4 | 4869 | { |
fe0750e5 BF |
4870 | struct nfs4_openowner *open_sop = NULL; |
4871 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 4872 | struct nfs4_ol_stateid *lock_stp = NULL; |
7214e860 | 4873 | struct nfs4_file *fp; |
7d947842 | 4874 | struct file *filp = NULL; |
21179d81 JL |
4875 | struct file_lock *file_lock = NULL; |
4876 | struct file_lock *conflock = NULL; | |
b37ad28b | 4877 | __be32 status = 0; |
64a284d0 | 4878 | bool new_state = false; |
b34f27aa | 4879 | int lkflg; |
b8dd7b9a | 4880 | int err; |
3320fef1 SK |
4881 | struct net *net = SVC_NET(rqstp); |
4882 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4883 | |
4884 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4885 | (long long) lock->lk_offset, | |
4886 | (long long) lock->lk_length); | |
4887 | ||
1da177e4 LT |
4888 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4889 | return nfserr_inval; | |
4890 | ||
ca364317 | 4891 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4892 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4893 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4894 | return status; | |
4895 | } | |
4896 | ||
1da177e4 LT |
4897 | nfs4_lock_state(); |
4898 | ||
4899 | if (lock->lk_is_new) { | |
dcef0413 | 4900 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4901 | |
4902 | if (nfsd4_has_session(cstate)) | |
4903 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4904 | memcpy(&lock->v.new.clientid, | |
4905 | &cstate->session->se_client->cl_clientid, | |
4906 | sizeof(clientid_t)); | |
4907 | ||
1da177e4 | 4908 | status = nfserr_stale_clientid; |
2c142baa | 4909 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4910 | goto out; |
1da177e4 | 4911 | |
1da177e4 | 4912 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4913 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4914 | lock->lk_new_open_seqid, |
4915 | &lock->lk_new_open_stateid, | |
3320fef1 | 4916 | &open_stp, nn); |
37515177 | 4917 | if (status) |
1da177e4 | 4918 | goto out; |
fe0750e5 | 4919 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4920 | status = nfserr_bad_stateid; |
684e5638 | 4921 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4922 | &lock->v.new.clientid)) |
4923 | goto out; | |
64a284d0 BF |
4924 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4925 | &lock_stp, &new_state); | |
3d0fabd5 | 4926 | } else { |
dd453dfd | 4927 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4928 | lock->lk_old_lock_seqid, |
4929 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4930 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 TM |
4931 | /* FIXME: move into nfs4_preprocess_seqid_op */ |
4932 | if (!status) | |
4933 | atomic_inc(&lock_stp->st_stid.sc_count); | |
4934 | } | |
e1aaa891 BF |
4935 | if (status) |
4936 | goto out; | |
64a284d0 | 4937 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4938 | |
b34f27aa BF |
4939 | lkflg = setlkflg(lock->lk_type); |
4940 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4941 | if (status) | |
4942 | goto out; | |
4943 | ||
0dd395dc | 4944 | status = nfserr_grace; |
3320fef1 | 4945 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4946 | goto out; |
4947 | status = nfserr_no_grace; | |
3320fef1 | 4948 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4949 | goto out; |
4950 | ||
21179d81 JL |
4951 | file_lock = locks_alloc_lock(); |
4952 | if (!file_lock) { | |
4953 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4954 | status = nfserr_jukebox; | |
4955 | goto out; | |
4956 | } | |
4957 | ||
11b9164a | 4958 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 4959 | locks_init_lock(file_lock); |
1da177e4 LT |
4960 | switch (lock->lk_type) { |
4961 | case NFS4_READ_LT: | |
4962 | case NFS4_READW_LT: | |
7214e860 JL |
4963 | spin_lock(&fp->fi_lock); |
4964 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
4965 | if (filp) |
4966 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 4967 | spin_unlock(&fp->fi_lock); |
21179d81 | 4968 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4969 | break; |
1da177e4 LT |
4970 | case NFS4_WRITE_LT: |
4971 | case NFS4_WRITEW_LT: | |
7214e860 JL |
4972 | spin_lock(&fp->fi_lock); |
4973 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
4974 | if (filp) |
4975 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 4976 | spin_unlock(&fp->fi_lock); |
21179d81 | 4977 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4978 | break; |
1da177e4 LT |
4979 | default: |
4980 | status = nfserr_inval; | |
4981 | goto out; | |
4982 | } | |
f9d7562f BF |
4983 | if (!filp) { |
4984 | status = nfserr_openmode; | |
4985 | goto out; | |
4986 | } | |
21179d81 JL |
4987 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4988 | file_lock->fl_pid = current->tgid; | |
4989 | file_lock->fl_file = filp; | |
4990 | file_lock->fl_flags = FL_POSIX; | |
4991 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4992 | file_lock->fl_start = lock->lk_offset; | |
4993 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4994 | nfs4_transform_lock_offset(file_lock); | |
4995 | ||
4996 | conflock = locks_alloc_lock(); | |
4997 | if (!conflock) { | |
4998 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4999 | status = nfserr_jukebox; | |
5000 | goto out; | |
5001 | } | |
1da177e4 | 5002 | |
21179d81 | 5003 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5004 | switch (-err) { |
1da177e4 | 5005 | case 0: /* success! */ |
dcef0413 BF |
5006 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5007 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5008 | sizeof(stateid_t)); |
b8dd7b9a | 5009 | status = 0; |
eb76b3fd AA |
5010 | break; |
5011 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5012 | status = nfserr_denied; | |
5013 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5014 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5015 | break; |
1da177e4 LT |
5016 | case (EDEADLK): |
5017 | status = nfserr_deadlock; | |
eb76b3fd | 5018 | break; |
3e772463 | 5019 | default: |
fd85b817 | 5020 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5021 | status = nfserrno(err); |
eb76b3fd | 5022 | break; |
1da177e4 | 5023 | } |
1da177e4 | 5024 | out: |
de18643d TM |
5025 | if (filp) |
5026 | fput(filp); | |
3d0fabd5 TM |
5027 | if (lock_stp) |
5028 | nfs4_put_stid(&lock_stp->st_stid); | |
64a284d0 | 5029 | if (status && new_state) |
c53530da | 5030 | release_lock_stateid(lock_stp); |
9411b1d4 | 5031 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
5032 | if (!cstate->replay_owner) |
5033 | nfs4_unlock_state(); | |
21179d81 JL |
5034 | if (file_lock) |
5035 | locks_free_lock(file_lock); | |
5036 | if (conflock) | |
5037 | locks_free_lock(conflock); | |
1da177e4 LT |
5038 | return status; |
5039 | } | |
5040 | ||
55ef1274 BF |
5041 | /* |
5042 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5043 | * so we do a temporary open here just to get an open file to pass to | |
5044 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5045 | * inode operation.) | |
5046 | */ | |
04da6e9d | 5047 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5048 | { |
5049 | struct file *file; | |
04da6e9d AV |
5050 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5051 | if (!err) { | |
5052 | err = nfserrno(vfs_test_lock(file, lock)); | |
5053 | nfsd_close(file); | |
5054 | } | |
55ef1274 BF |
5055 | return err; |
5056 | } | |
5057 | ||
1da177e4 LT |
5058 | /* |
5059 | * LOCKT operation | |
5060 | */ | |
b37ad28b | 5061 | __be32 |
ca364317 BF |
5062 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5063 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5064 | { |
21179d81 | 5065 | struct file_lock *file_lock = NULL; |
fe0750e5 | 5066 | struct nfs4_lockowner *lo; |
b37ad28b | 5067 | __be32 status; |
7f2210fa | 5068 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5069 | |
5ccb0066 | 5070 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5071 | return nfserr_grace; |
5072 | ||
5073 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5074 | return nfserr_inval; | |
5075 | ||
1da177e4 LT |
5076 | nfs4_lock_state(); |
5077 | ||
9b2ef62b | 5078 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5079 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5080 | if (status) |
5081 | goto out; | |
5082 | } | |
1da177e4 | 5083 | |
75c096f7 | 5084 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5085 | goto out; |
1da177e4 | 5086 | |
21179d81 JL |
5087 | file_lock = locks_alloc_lock(); |
5088 | if (!file_lock) { | |
5089 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5090 | status = nfserr_jukebox; | |
5091 | goto out; | |
5092 | } | |
5093 | locks_init_lock(file_lock); | |
1da177e4 LT |
5094 | switch (lockt->lt_type) { |
5095 | case NFS4_READ_LT: | |
5096 | case NFS4_READW_LT: | |
21179d81 | 5097 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5098 | break; |
5099 | case NFS4_WRITE_LT: | |
5100 | case NFS4_WRITEW_LT: | |
21179d81 | 5101 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5102 | break; |
5103 | default: | |
2fdada03 | 5104 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5105 | status = nfserr_inval; |
5106 | goto out; | |
5107 | } | |
5108 | ||
b3c32bcd | 5109 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 5110 | if (lo) |
21179d81 JL |
5111 | file_lock->fl_owner = (fl_owner_t)lo; |
5112 | file_lock->fl_pid = current->tgid; | |
5113 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5114 | |
21179d81 JL |
5115 | file_lock->fl_start = lockt->lt_offset; |
5116 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5117 | |
21179d81 | 5118 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5119 | |
21179d81 | 5120 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5121 | if (status) |
fd85b817 | 5122 | goto out; |
04da6e9d | 5123 | |
21179d81 | 5124 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5125 | status = nfserr_denied; |
21179d81 | 5126 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5127 | } |
5128 | out: | |
5129 | nfs4_unlock_state(); | |
21179d81 JL |
5130 | if (file_lock) |
5131 | locks_free_lock(file_lock); | |
1da177e4 LT |
5132 | return status; |
5133 | } | |
5134 | ||
b37ad28b | 5135 | __be32 |
ca364317 | 5136 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5137 | struct nfsd4_locku *locku) |
1da177e4 | 5138 | { |
dcef0413 | 5139 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5140 | struct file *filp = NULL; |
21179d81 | 5141 | struct file_lock *file_lock = NULL; |
b37ad28b | 5142 | __be32 status; |
b8dd7b9a | 5143 | int err; |
3320fef1 SK |
5144 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5145 | ||
1da177e4 LT |
5146 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5147 | (long long) locku->lu_offset, | |
5148 | (long long) locku->lu_length); | |
5149 | ||
5150 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5151 | return nfserr_inval; | |
5152 | ||
5153 | nfs4_lock_state(); | |
5154 | ||
9072d5c6 | 5155 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5156 | &locku->lu_stateid, NFS4_LOCK_STID, |
5157 | &stp, nn); | |
9072d5c6 | 5158 | if (status) |
1da177e4 | 5159 | goto out; |
858cc573 TM |
5160 | /* FIXME: move into nfs4_preprocess_seqid_op */ |
5161 | atomic_inc(&stp->st_stid.sc_count); | |
11b9164a | 5162 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5163 | if (!filp) { |
5164 | status = nfserr_lock_range; | |
858cc573 | 5165 | goto put_stateid; |
f9d7562f | 5166 | } |
21179d81 JL |
5167 | file_lock = locks_alloc_lock(); |
5168 | if (!file_lock) { | |
5169 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5170 | status = nfserr_jukebox; | |
de18643d | 5171 | goto fput; |
21179d81 JL |
5172 | } |
5173 | locks_init_lock(file_lock); | |
5174 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5175 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5176 | file_lock->fl_pid = current->tgid; |
5177 | file_lock->fl_file = filp; | |
5178 | file_lock->fl_flags = FL_POSIX; | |
5179 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5180 | file_lock->fl_start = locku->lu_offset; | |
5181 | ||
5182 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5183 | locku->lu_length); | |
5184 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5185 | |
21179d81 | 5186 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5187 | if (err) { |
fd85b817 | 5188 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5189 | goto out_nfserr; |
5190 | } | |
dcef0413 BF |
5191 | update_stateid(&stp->st_stid.sc_stateid); |
5192 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5193 | fput: |
5194 | fput(filp); | |
858cc573 TM |
5195 | put_stateid: |
5196 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5197 | out: |
9411b1d4 | 5198 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
5199 | if (!cstate->replay_owner) |
5200 | nfs4_unlock_state(); | |
21179d81 JL |
5201 | if (file_lock) |
5202 | locks_free_lock(file_lock); | |
1da177e4 LT |
5203 | return status; |
5204 | ||
5205 | out_nfserr: | |
b8dd7b9a | 5206 | status = nfserrno(err); |
de18643d | 5207 | goto fput; |
1da177e4 LT |
5208 | } |
5209 | ||
5210 | /* | |
5211 | * returns | |
f9c00c3a JL |
5212 | * true: locks held by lockowner |
5213 | * false: no locks held by lockowner | |
1da177e4 | 5214 | */ |
f9c00c3a JL |
5215 | static bool |
5216 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5217 | { |
5218 | struct file_lock **flpp; | |
f9c00c3a JL |
5219 | int status = false; |
5220 | struct file *filp = find_any_file(fp); | |
5221 | struct inode *inode; | |
5222 | ||
5223 | if (!filp) { | |
5224 | /* Any valid lock stateid should have some sort of access */ | |
5225 | WARN_ON_ONCE(1); | |
5226 | return status; | |
5227 | } | |
5228 | ||
5229 | inode = file_inode(filp); | |
1da177e4 | 5230 | |
1c8c601a | 5231 | spin_lock(&inode->i_lock); |
1da177e4 | 5232 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5233 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5234 | status = true; |
5235 | break; | |
796dadfd | 5236 | } |
1da177e4 | 5237 | } |
1c8c601a | 5238 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5239 | fput(filp); |
1da177e4 LT |
5240 | return status; |
5241 | } | |
5242 | ||
b37ad28b | 5243 | __be32 |
b591480b BF |
5244 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5245 | struct nfsd4_compound_state *cstate, | |
5246 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5247 | { |
5248 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 5249 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 5250 | struct nfs4_lockowner *lo; |
dcef0413 | 5251 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5252 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 5253 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 5254 | __be32 status; |
7f2210fa | 5255 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
5256 | |
5257 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5258 | clid->cl_boot, clid->cl_id); | |
5259 | ||
1da177e4 LT |
5260 | nfs4_lock_state(); |
5261 | ||
4b24ca7d | 5262 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5263 | if (status) |
5264 | goto out; | |
5265 | ||
3e9e3dbe | 5266 | status = nfserr_locks_held; |
06f1f864 | 5267 | |
fd44907c JL |
5268 | /* Find the matching lock stateowner */ |
5269 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
5270 | if (tmp->so_is_open_owner) | |
06f1f864 | 5271 | continue; |
fd44907c JL |
5272 | if (same_owner_str(tmp, owner, clid)) { |
5273 | sop = tmp; | |
5274 | break; | |
1da177e4 | 5275 | } |
3e9e3dbe | 5276 | } |
fd44907c JL |
5277 | |
5278 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
5279 | if (!sop) { | |
5280 | status = nfs_ok; | |
5281 | goto out; | |
5282 | } | |
5283 | ||
5284 | lo = lockowner(sop); | |
5285 | /* see if there are still any locks associated with it */ | |
5286 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
11b9164a | 5287 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
fd44907c | 5288 | goto out; |
1da177e4 | 5289 | } |
fd44907c JL |
5290 | |
5291 | status = nfs_ok; | |
5292 | release_lockowner(lo); | |
1da177e4 LT |
5293 | out: |
5294 | nfs4_unlock_state(); | |
5295 | return status; | |
5296 | } | |
5297 | ||
5298 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5299 | alloc_reclaim(void) |
1da177e4 | 5300 | { |
a55370a3 | 5301 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5302 | } |
5303 | ||
0ce0c2b5 | 5304 | bool |
52e19c09 | 5305 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5306 | { |
0ce0c2b5 | 5307 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5308 | |
52e19c09 | 5309 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5310 | return (crp && crp->cr_clp); |
c7b9a459 N |
5311 | } |
5312 | ||
1da177e4 LT |
5313 | /* |
5314 | * failure => all reset bets are off, nfserr_no_grace... | |
5315 | */ | |
772a9bbb | 5316 | struct nfs4_client_reclaim * |
52e19c09 | 5317 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5318 | { |
5319 | unsigned int strhashval; | |
772a9bbb | 5320 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5321 | |
a55370a3 N |
5322 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5323 | crp = alloc_reclaim(); | |
772a9bbb JL |
5324 | if (crp) { |
5325 | strhashval = clientstr_hashval(name); | |
5326 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5327 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5328 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5329 | crp->cr_clp = NULL; |
52e19c09 | 5330 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5331 | } |
5332 | return crp; | |
1da177e4 LT |
5333 | } |
5334 | ||
ce30e539 | 5335 | void |
52e19c09 | 5336 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5337 | { |
5338 | list_del(&crp->cr_strhash); | |
5339 | kfree(crp); | |
52e19c09 | 5340 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5341 | } |
5342 | ||
2a4317c5 | 5343 | void |
52e19c09 | 5344 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5345 | { |
5346 | struct nfs4_client_reclaim *crp = NULL; | |
5347 | int i; | |
5348 | ||
1da177e4 | 5349 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5350 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5351 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5352 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5353 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5354 | } |
5355 | } | |
063b0fb9 | 5356 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5357 | } |
5358 | ||
5359 | /* | |
5360 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5361 | struct nfs4_client_reclaim * |
52e19c09 | 5362 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5363 | { |
5364 | unsigned int strhashval; | |
1da177e4 LT |
5365 | struct nfs4_client_reclaim *crp = NULL; |
5366 | ||
278c931c | 5367 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5368 | |
278c931c | 5369 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5370 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5371 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5372 | return crp; |
5373 | } | |
5374 | } | |
5375 | return NULL; | |
5376 | } | |
5377 | ||
5378 | /* | |
5379 | * Called from OPEN. Look for clientid in reclaim list. | |
5380 | */ | |
b37ad28b | 5381 | __be32 |
0fe492db TM |
5382 | nfs4_check_open_reclaim(clientid_t *clid, |
5383 | struct nfsd4_compound_state *cstate, | |
5384 | struct nfsd_net *nn) | |
1da177e4 | 5385 | { |
0fe492db | 5386 | __be32 status; |
a52d726b JL |
5387 | |
5388 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5389 | status = lookup_clientid(clid, cstate, nn); |
5390 | if (status) | |
a52d726b JL |
5391 | return nfserr_reclaim_bad; |
5392 | ||
0fe492db TM |
5393 | if (nfsd4_client_record_check(cstate->clp)) |
5394 | return nfserr_reclaim_bad; | |
5395 | ||
5396 | return nfs_ok; | |
1da177e4 LT |
5397 | } |
5398 | ||
65178db4 BS |
5399 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5400 | ||
44e34da6 BS |
5401 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5402 | { | |
221a6876 BF |
5403 | if (mark_client_expired(clp)) |
5404 | return 0; | |
44e34da6 BS |
5405 | expire_client(clp); |
5406 | return 1; | |
5407 | } | |
5408 | ||
184c1847 BS |
5409 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5410 | { | |
5411 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5412 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5413 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5414 | return 1; | |
5415 | } | |
5416 | ||
5417 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5418 | const char *type) | |
5419 | { | |
5420 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5421 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5422 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5423 | } | |
5424 | ||
3c87b9b7 TM |
5425 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5426 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5427 | { |
5428 | struct nfs4_openowner *oop; | |
fc29171f | 5429 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5430 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5431 | u64 count = 0; |
5432 | ||
5433 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5434 | list_for_each_entry_safe(stp, st_next, |
5435 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5436 | list_for_each_entry_safe(lst, lst_next, | |
5437 | &stp->st_locks, st_locks) { | |
fc29171f | 5438 | if (func) |
3c87b9b7 | 5439 | func(lst); |
fc29171f BS |
5440 | if (++count == max) |
5441 | return count; | |
5442 | } | |
5443 | } | |
5444 | } | |
5445 | ||
5446 | return count; | |
5447 | } | |
5448 | ||
5449 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5450 | { | |
3c87b9b7 | 5451 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5452 | } |
5453 | ||
184c1847 BS |
5454 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5455 | { | |
5456 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5457 | nfsd_print_count(clp, count, "locked files"); | |
5458 | return count; | |
5459 | } | |
5460 | ||
4dbdbda8 BS |
5461 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5462 | { | |
5463 | struct nfs4_openowner *oop, *next; | |
5464 | u64 count = 0; | |
5465 | ||
5466 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5467 | if (func) | |
5468 | func(oop); | |
5469 | if (++count == max) | |
5470 | break; | |
5471 | } | |
5472 | ||
5473 | return count; | |
5474 | } | |
5475 | ||
5476 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5477 | { | |
5478 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5479 | } | |
5480 | ||
184c1847 BS |
5481 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5482 | { | |
5483 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5484 | nfsd_print_count(clp, count, "open files"); | |
5485 | return count; | |
5486 | } | |
5487 | ||
269de30f BS |
5488 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5489 | struct list_head *victims) | |
5490 | { | |
5491 | struct nfs4_delegation *dp, *next; | |
5492 | u64 count = 0; | |
5493 | ||
cdc97505 | 5494 | lockdep_assert_held(&state_lock); |
269de30f | 5495 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5496 | if (victims) { |
5497 | /* | |
5498 | * It's not safe to mess with delegations that have a | |
5499 | * non-zero dl_time. They might have already been broken | |
5500 | * and could be processed by the laundromat outside of | |
5501 | * the state_lock. Just leave them be. | |
5502 | */ | |
5503 | if (dp->dl_time != 0) | |
5504 | continue; | |
5505 | ||
42690676 JL |
5506 | unhash_delegation_locked(dp); |
5507 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5508 | } |
269de30f BS |
5509 | if (++count == max) |
5510 | break; | |
5511 | } | |
5512 | return count; | |
5513 | } | |
5514 | ||
5515 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5516 | { | |
5517 | struct nfs4_delegation *dp, *next; | |
5518 | LIST_HEAD(victims); | |
5519 | u64 count; | |
5520 | ||
cdc97505 | 5521 | spin_lock(&state_lock); |
269de30f | 5522 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5523 | spin_unlock(&state_lock); |
269de30f | 5524 | |
2d4a532d JL |
5525 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5526 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5527 | revoke_delegation(dp); |
2d4a532d | 5528 | } |
269de30f BS |
5529 | |
5530 | return count; | |
5531 | } | |
5532 | ||
5533 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5534 | { | |
dff1399f | 5535 | struct nfs4_delegation *dp; |
269de30f BS |
5536 | LIST_HEAD(victims); |
5537 | u64 count; | |
5538 | ||
cdc97505 | 5539 | spin_lock(&state_lock); |
269de30f | 5540 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5541 | while (!list_empty(&victims)) { |
5542 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5543 | dl_recall_lru); | |
5544 | list_del_init(&dp->dl_recall_lru); | |
5545 | dp->dl_time = 0; | |
269de30f | 5546 | nfsd_break_one_deleg(dp); |
dff1399f | 5547 | } |
cdc97505 | 5548 | spin_unlock(&state_lock); |
269de30f BS |
5549 | |
5550 | return count; | |
5551 | } | |
5552 | ||
184c1847 BS |
5553 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5554 | { | |
5555 | u64 count = 0; | |
5556 | ||
cdc97505 | 5557 | spin_lock(&state_lock); |
184c1847 | 5558 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5559 | spin_unlock(&state_lock); |
184c1847 BS |
5560 | |
5561 | nfsd_print_count(clp, count, "delegations"); | |
5562 | return count; | |
5563 | } | |
5564 | ||
44e34da6 | 5565 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5566 | { |
5567 | struct nfs4_client *clp, *next; | |
44e34da6 | 5568 | u64 count = 0; |
3320fef1 | 5569 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5570 | |
44e34da6 BS |
5571 | if (!nfsd_netns_ready(nn)) |
5572 | return 0; | |
5573 | ||
5ed58bb2 | 5574 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5575 | count += func(clp, max - count); |
5576 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5577 | break; |
5578 | } | |
65178db4 | 5579 | |
44e34da6 BS |
5580 | return count; |
5581 | } | |
5582 | ||
6c1e82a4 BS |
5583 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5584 | { | |
5585 | struct nfs4_client *clp; | |
5586 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5587 | ||
5588 | if (!nfsd_netns_ready(nn)) | |
5589 | return NULL; | |
5590 | ||
5591 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5592 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5593 | return clp; | |
5594 | } | |
5595 | return NULL; | |
5596 | } | |
5597 | ||
65178db4 BS |
5598 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5599 | ||
c2f1a551 MS |
5600 | /* |
5601 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5602 | * client may quite reasonably hang on to a delegation as long as it has | |
5603 | * the inode cached. This becomes an obvious problem the first time a | |
5604 | * client's inode cache approaches the size of the server's total memory. | |
5605 | * | |
5606 | * For now we avoid this problem by imposing a hard limit on the number | |
5607 | * of delegations, which varies according to the server's memory size. | |
5608 | */ | |
5609 | static void | |
5610 | set_max_delegations(void) | |
5611 | { | |
5612 | /* | |
5613 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5614 | * estimates suggest that in the worst case (where every delegation | |
5615 | * is for a different inode), a delegation could take about 1.5K, | |
5616 | * giving a worst case usage of about 6% of memory. | |
5617 | */ | |
5618 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5619 | } | |
5620 | ||
d85ed443 | 5621 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5622 | { |
5623 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5624 | int i; | |
5625 | ||
5626 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5627 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5628 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5629 | goto err; |
0a7ec377 SK |
5630 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5631 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5632 | if (!nn->unconf_id_hashtbl) | |
5633 | goto err_unconf_id; | |
9b531137 SK |
5634 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5635 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5636 | if (!nn->ownerstr_hashtbl) | |
5637 | goto err_ownerstr; | |
1872de0e SK |
5638 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5639 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5640 | if (!nn->sessionid_hashtbl) | |
5641 | goto err_sessionid; | |
8daae4dc | 5642 | |
382a62e7 | 5643 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5644 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5645 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5646 | } |
9b531137 SK |
5647 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5648 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5649 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5650 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5651 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5652 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5653 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5654 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5655 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5656 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5657 | |
09121281 | 5658 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5659 | get_net(net); |
09121281 | 5660 | |
8daae4dc | 5661 | return 0; |
382a62e7 | 5662 | |
1872de0e | 5663 | err_sessionid: |
20e9e2bc | 5664 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5665 | err_ownerstr: |
5666 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5667 | err_unconf_id: |
5668 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5669 | err: |
5670 | return -ENOMEM; | |
8daae4dc SK |
5671 | } |
5672 | ||
5673 | static void | |
4dce0ac9 | 5674 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5675 | { |
5676 | int i; | |
5677 | struct nfs4_client *clp = NULL; | |
5678 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5679 | ||
5680 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5681 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5682 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5683 | destroy_client(clp); | |
5684 | } | |
5685 | } | |
a99454aa | 5686 | |
2b905635 KM |
5687 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5688 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5689 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5690 | destroy_client(clp); | |
5691 | } | |
a99454aa SK |
5692 | } |
5693 | ||
1872de0e | 5694 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5695 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5696 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5697 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5698 | put_net(net); |
8daae4dc SK |
5699 | } |
5700 | ||
f252bc68 | 5701 | int |
d85ed443 | 5702 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5703 | { |
5e1533c7 | 5704 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5705 | int ret; |
5706 | ||
d85ed443 | 5707 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5708 | if (ret) |
5709 | return ret; | |
5e1533c7 | 5710 | nfsd4_client_tracking_init(net); |
2c142baa | 5711 | nn->boot_time = get_seconds(); |
5ccb0066 | 5712 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5713 | nn->grace_ended = false; |
d85ed443 | 5714 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5715 | nn->nfsd4_grace, net); |
5716 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5717 | return 0; |
5718 | } | |
5719 | ||
5720 | /* initialization to perform when the nfsd service is started: */ | |
5721 | ||
5722 | int | |
5723 | nfs4_state_start(void) | |
5724 | { | |
5725 | int ret; | |
5726 | ||
b5a1a81e | 5727 | ret = set_callback_cred(); |
d85ed443 SK |
5728 | if (ret) |
5729 | return -ENOMEM; | |
58da282b | 5730 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5731 | if (laundry_wq == NULL) { |
5732 | ret = -ENOMEM; | |
5733 | goto out_recovery; | |
5734 | } | |
b5a1a81e BF |
5735 | ret = nfsd4_create_callback_queue(); |
5736 | if (ret) | |
5737 | goto out_free_laundry; | |
09121281 | 5738 | |
c2f1a551 | 5739 | set_max_delegations(); |
d85ed443 | 5740 | |
b5a1a81e | 5741 | return 0; |
d85ed443 | 5742 | |
b5a1a81e BF |
5743 | out_free_laundry: |
5744 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5745 | out_recovery: |
b5a1a81e | 5746 | return ret; |
1da177e4 LT |
5747 | } |
5748 | ||
f252bc68 | 5749 | void |
4dce0ac9 | 5750 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5751 | { |
1da177e4 | 5752 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5753 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5754 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5755 | |
4dce0ac9 SK |
5756 | cancel_delayed_work_sync(&nn->laundromat_work); |
5757 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5758 | |
e50a26dc | 5759 | nfs4_lock_state(); |
1da177e4 | 5760 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5761 | spin_lock(&state_lock); |
e8c69d17 | 5762 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5763 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5764 | unhash_delegation_locked(dp); |
5765 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5766 | } |
cdc97505 | 5767 | spin_unlock(&state_lock); |
1da177e4 LT |
5768 | list_for_each_safe(pos, next, &reaplist) { |
5769 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5770 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5771 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5772 | } |
5773 | ||
3320fef1 | 5774 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5775 | nfs4_state_destroy_net(net); |
e50a26dc | 5776 | nfs4_unlock_state(); |
1da177e4 LT |
5777 | } |
5778 | ||
5779 | void | |
5780 | nfs4_state_shutdown(void) | |
5781 | { | |
5e8d5c29 | 5782 | destroy_workqueue(laundry_wq); |
c3935e30 | 5783 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5784 | } |
8b70484c TM |
5785 | |
5786 | static void | |
5787 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5788 | { | |
37c593c5 TM |
5789 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5790 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5791 | } |
5792 | ||
5793 | static void | |
5794 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5795 | { | |
37c593c5 TM |
5796 | if (cstate->minorversion) { |
5797 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5798 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5799 | } | |
5800 | } | |
5801 | ||
5802 | void | |
5803 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5804 | { | |
5805 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5806 | } |
5807 | ||
62cd4a59 TM |
5808 | /* |
5809 | * functions to set current state id | |
5810 | */ | |
9428fe1a TM |
5811 | void |
5812 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5813 | { | |
5814 | put_stateid(cstate, &odp->od_stateid); | |
5815 | } | |
5816 | ||
8b70484c TM |
5817 | void |
5818 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5819 | { | |
5820 | put_stateid(cstate, &open->op_stateid); | |
5821 | } | |
5822 | ||
62cd4a59 TM |
5823 | void |
5824 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5825 | { | |
5826 | put_stateid(cstate, &close->cl_stateid); | |
5827 | } | |
5828 | ||
5829 | void | |
5830 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5831 | { | |
5832 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5833 | } | |
5834 | ||
5835 | /* | |
5836 | * functions to consume current state id | |
5837 | */ | |
1e97b519 | 5838 | |
9428fe1a TM |
5839 | void |
5840 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5841 | { | |
5842 | get_stateid(cstate, &odp->od_stateid); | |
5843 | } | |
5844 | ||
5845 | void | |
5846 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5847 | { | |
5848 | get_stateid(cstate, &drp->dr_stateid); | |
5849 | } | |
5850 | ||
1e97b519 TM |
5851 | void |
5852 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5853 | { | |
5854 | get_stateid(cstate, &fsp->fr_stateid); | |
5855 | } | |
5856 | ||
5857 | void | |
5858 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5859 | { | |
5860 | get_stateid(cstate, &setattr->sa_stateid); | |
5861 | } | |
5862 | ||
8b70484c TM |
5863 | void |
5864 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5865 | { | |
5866 | get_stateid(cstate, &close->cl_stateid); | |
5867 | } | |
5868 | ||
5869 | void | |
62cd4a59 | 5870 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5871 | { |
62cd4a59 | 5872 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5873 | } |
30813e27 TM |
5874 | |
5875 | void | |
5876 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5877 | { | |
5878 | get_stateid(cstate, &read->rd_stateid); | |
5879 | } | |
5880 | ||
5881 | void | |
5882 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5883 | { | |
5884 | get_stateid(cstate, &write->wr_stateid); | |
5885 | } |