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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
f9c00c3a | 73 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 74 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* Locking: */ |
77 | ||
78 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 79 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 80 | |
8b671b80 BF |
81 | /* |
82 | * Currently used for the del_recall_lru and file hash table. In an | |
83 | * effort to decrease the scope of the client_mutex, this spinlock may | |
84 | * eventually cover more: | |
85 | */ | |
cdc97505 | 86 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 87 | |
abf1135b CH |
88 | static struct kmem_cache *openowner_slab; |
89 | static struct kmem_cache *lockowner_slab; | |
90 | static struct kmem_cache *file_slab; | |
91 | static struct kmem_cache *stateid_slab; | |
92 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 93 | |
1da177e4 LT |
94 | void |
95 | nfs4_lock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_lock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
66b2b9b2 | 100 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 101 | |
f0f51f5c | 102 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 103 | { |
f0f51f5c | 104 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
105 | } |
106 | ||
f0f51f5c | 107 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 108 | { |
f0f51f5c | 109 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
110 | return nfserr_jukebox; |
111 | ses->se_flags |= NFS4_SESSION_DEAD; | |
112 | return nfs_ok; | |
508dc6e1 BH |
113 | } |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
221a6876 BF |
121 | static bool is_client_expired(struct nfs4_client *clp) |
122 | { | |
123 | return clp->cl_time == 0; | |
124 | } | |
125 | ||
126 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
127 | { | |
128 | if (atomic_read(&clp->cl_refcount)) | |
129 | return nfserr_jukebox; | |
130 | clp->cl_time = 0; | |
131 | return nfs_ok; | |
132 | } | |
133 | ||
134 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
135 | { | |
136 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
137 | __be32 ret; | |
138 | ||
139 | spin_lock(&nn->client_lock); | |
140 | ret = mark_client_expired_locked(clp); | |
141 | spin_unlock(&nn->client_lock); | |
142 | return ret; | |
143 | } | |
144 | ||
145 | static __be32 get_client_locked(struct nfs4_client *clp) | |
146 | { | |
147 | if (is_client_expired(clp)) | |
148 | return nfserr_expired; | |
149 | atomic_inc(&clp->cl_refcount); | |
150 | return nfs_ok; | |
151 | } | |
152 | ||
153 | /* must be called under the client_lock */ | |
154 | static inline void | |
155 | renew_client_locked(struct nfs4_client *clp) | |
156 | { | |
157 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
158 | ||
159 | if (is_client_expired(clp)) { | |
160 | WARN_ON(1); | |
161 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
162 | __func__, | |
163 | clp->cl_clientid.cl_boot, | |
164 | clp->cl_clientid.cl_id); | |
165 | return; | |
166 | } | |
167 | ||
168 | dprintk("renewing client (clientid %08x/%08x)\n", | |
169 | clp->cl_clientid.cl_boot, | |
170 | clp->cl_clientid.cl_id); | |
171 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
172 | clp->cl_time = get_seconds(); | |
173 | } | |
174 | ||
175 | static inline void | |
176 | renew_client(struct nfs4_client *clp) | |
177 | { | |
178 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
179 | ||
180 | spin_lock(&nn->client_lock); | |
181 | renew_client_locked(clp); | |
182 | spin_unlock(&nn->client_lock); | |
183 | } | |
184 | ||
ba138435 | 185 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
186 | { |
187 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
188 | return; | |
189 | if (!is_client_expired(clp)) | |
190 | renew_client_locked(clp); | |
191 | } | |
192 | ||
4b24ca7d JL |
193 | static void put_client_renew(struct nfs4_client *clp) |
194 | { | |
195 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
196 | ||
d6c249b4 JL |
197 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
198 | return; | |
199 | if (!is_client_expired(clp)) | |
200 | renew_client_locked(clp); | |
4b24ca7d JL |
201 | spin_unlock(&nn->client_lock); |
202 | } | |
203 | ||
d4e19e70 TM |
204 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
205 | { | |
206 | __be32 status; | |
207 | ||
208 | if (is_session_dead(ses)) | |
209 | return nfserr_badsession; | |
210 | status = get_client_locked(ses->se_client); | |
211 | if (status) | |
212 | return status; | |
213 | atomic_inc(&ses->se_ref); | |
214 | return nfs_ok; | |
215 | } | |
216 | ||
217 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
218 | { | |
219 | struct nfs4_client *clp = ses->se_client; | |
220 | ||
221 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
222 | free_session(ses); | |
223 | put_client_renew_locked(clp); | |
224 | } | |
225 | ||
226 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
227 | { | |
228 | struct nfs4_client *clp = ses->se_client; | |
229 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
230 | ||
231 | spin_lock(&nn->client_lock); | |
232 | nfsd4_put_session_locked(ses); | |
233 | spin_unlock(&nn->client_lock); | |
234 | } | |
235 | ||
236 | ||
1da177e4 LT |
237 | static inline u32 |
238 | opaque_hashval(const void *ptr, int nbytes) | |
239 | { | |
240 | unsigned char *cptr = (unsigned char *) ptr; | |
241 | ||
242 | u32 x = 0; | |
243 | while (nbytes--) { | |
244 | x *= 37; | |
245 | x += *cptr++; | |
246 | } | |
247 | return x; | |
248 | } | |
249 | ||
32513b40 BF |
250 | static void nfsd4_free_file(struct nfs4_file *f) |
251 | { | |
252 | kmem_cache_free(file_slab, f); | |
253 | } | |
254 | ||
13cd2184 N |
255 | static inline void |
256 | put_nfs4_file(struct nfs4_file *fi) | |
257 | { | |
02e1215f JL |
258 | might_lock(&state_lock); |
259 | ||
cdc97505 | 260 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 261 | hlist_del(&fi->fi_hash); |
cdc97505 | 262 | spin_unlock(&state_lock); |
32513b40 | 263 | nfsd4_free_file(fi); |
8b671b80 | 264 | } |
13cd2184 N |
265 | } |
266 | ||
267 | static inline void | |
268 | get_nfs4_file(struct nfs4_file *fi) | |
269 | { | |
8b671b80 | 270 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
271 | } |
272 | ||
de18643d TM |
273 | static struct file * |
274 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
275 | { | |
276 | if (f->fi_fds[oflag]) | |
277 | return get_file(f->fi_fds[oflag]); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | static struct file * | |
282 | find_writeable_file_locked(struct nfs4_file *f) | |
283 | { | |
284 | struct file *ret; | |
285 | ||
286 | lockdep_assert_held(&f->fi_lock); | |
287 | ||
288 | ret = __nfs4_get_fd(f, O_WRONLY); | |
289 | if (!ret) | |
290 | ret = __nfs4_get_fd(f, O_RDWR); | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static struct file * | |
295 | find_writeable_file(struct nfs4_file *f) | |
296 | { | |
297 | struct file *ret; | |
298 | ||
299 | spin_lock(&f->fi_lock); | |
300 | ret = find_writeable_file_locked(f); | |
301 | spin_unlock(&f->fi_lock); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
307 | { | |
308 | struct file *ret; | |
309 | ||
310 | lockdep_assert_held(&f->fi_lock); | |
311 | ||
312 | ret = __nfs4_get_fd(f, O_RDONLY); | |
313 | if (!ret) | |
314 | ret = __nfs4_get_fd(f, O_RDWR); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static struct file * | |
319 | find_readable_file(struct nfs4_file *f) | |
320 | { | |
321 | struct file *ret; | |
322 | ||
323 | spin_lock(&f->fi_lock); | |
324 | ret = find_readable_file_locked(f); | |
325 | spin_unlock(&f->fi_lock); | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static struct file * | |
331 | find_any_file(struct nfs4_file *f) | |
332 | { | |
333 | struct file *ret; | |
334 | ||
335 | spin_lock(&f->fi_lock); | |
336 | ret = __nfs4_get_fd(f, O_RDWR); | |
337 | if (!ret) { | |
338 | ret = __nfs4_get_fd(f, O_WRONLY); | |
339 | if (!ret) | |
340 | ret = __nfs4_get_fd(f, O_RDONLY); | |
341 | } | |
342 | spin_unlock(&f->fi_lock); | |
343 | return ret; | |
344 | } | |
345 | ||
02a3508d | 346 | static atomic_long_t num_delegations; |
697ce9be | 347 | unsigned long max_delegations; |
ef0f3390 N |
348 | |
349 | /* | |
350 | * Open owner state (share locks) | |
351 | */ | |
352 | ||
16bfdaaf BF |
353 | /* hash tables for lock and open owners */ |
354 | #define OWNER_HASH_BITS 8 | |
355 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
356 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 357 | |
16bfdaaf | 358 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
359 | { |
360 | unsigned int ret; | |
361 | ||
362 | ret = opaque_hashval(ownername->data, ownername->len); | |
363 | ret += clientid; | |
16bfdaaf | 364 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 365 | } |
ef0f3390 | 366 | |
ef0f3390 N |
367 | /* hash table for nfs4_file */ |
368 | #define FILE_HASH_BITS 8 | |
369 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 370 | |
ca943217 | 371 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 372 | { |
ca943217 TM |
373 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
374 | } | |
375 | ||
376 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
377 | { | |
378 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
379 | } | |
380 | ||
381 | static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) | |
382 | { | |
383 | return fh1->fh_size == fh2->fh_size && | |
384 | !memcmp(fh1->fh_base.fh_pad, | |
385 | fh2->fh_base.fh_pad, | |
386 | fh1->fh_size); | |
ddc04c41 BF |
387 | } |
388 | ||
89876f8c | 389 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 390 | |
12659651 JL |
391 | static void |
392 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 393 | { |
7214e860 JL |
394 | lockdep_assert_held(&fp->fi_lock); |
395 | ||
12659651 JL |
396 | if (access & NFS4_SHARE_ACCESS_WRITE) |
397 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
398 | if (access & NFS4_SHARE_ACCESS_READ) | |
399 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
400 | } |
401 | ||
12659651 JL |
402 | static __be32 |
403 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 404 | { |
7214e860 JL |
405 | lockdep_assert_held(&fp->fi_lock); |
406 | ||
12659651 JL |
407 | /* Does this access mode make sense? */ |
408 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
409 | return nfserr_inval; | |
410 | ||
baeb4ff0 JL |
411 | /* Does it conflict with a deny mode already set? */ |
412 | if ((access & fp->fi_share_deny) != 0) | |
413 | return nfserr_share_denied; | |
414 | ||
12659651 JL |
415 | __nfs4_file_get_access(fp, access); |
416 | return nfs_ok; | |
998db52c BF |
417 | } |
418 | ||
baeb4ff0 JL |
419 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
420 | { | |
421 | /* Common case is that there is no deny mode. */ | |
422 | if (deny) { | |
423 | /* Does this deny mode make sense? */ | |
424 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
425 | return nfserr_inval; | |
426 | ||
427 | if ((deny & NFS4_SHARE_DENY_READ) && | |
428 | atomic_read(&fp->fi_access[O_RDONLY])) | |
429 | return nfserr_share_denied; | |
430 | ||
431 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
432 | atomic_read(&fp->fi_access[O_WRONLY])) | |
433 | return nfserr_share_denied; | |
434 | } | |
435 | return nfs_ok; | |
436 | } | |
437 | ||
998db52c | 438 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 439 | { |
de18643d TM |
440 | might_lock(&fp->fi_lock); |
441 | ||
442 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
443 | struct file *f1 = NULL; | |
444 | struct file *f2 = NULL; | |
445 | ||
6d338b51 | 446 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 447 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 448 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
449 | spin_unlock(&fp->fi_lock); |
450 | if (f1) | |
451 | fput(f1); | |
452 | if (f2) | |
453 | fput(f2); | |
f9d7562f BF |
454 | } |
455 | } | |
456 | ||
12659651 | 457 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 458 | { |
12659651 JL |
459 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
460 | ||
461 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 462 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
463 | if (access & NFS4_SHARE_ACCESS_READ) |
464 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
465 | } |
466 | ||
6011695d TM |
467 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, |
468 | struct kmem_cache *slab) | |
2a74aba7 | 469 | { |
3abdb607 | 470 | struct nfs4_stid *stid; |
6136d2b4 | 471 | int new_id; |
2a74aba7 | 472 | |
f8338834 | 473 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
474 | if (!stid) |
475 | return NULL; | |
476 | ||
4770d722 JL |
477 | idr_preload(GFP_KERNEL); |
478 | spin_lock(&cl->cl_lock); | |
479 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); | |
480 | spin_unlock(&cl->cl_lock); | |
481 | idr_preload_end(); | |
ebd6c707 | 482 | if (new_id < 0) |
3abdb607 | 483 | goto out_free; |
2a74aba7 | 484 | stid->sc_client = cl; |
3abdb607 BF |
485 | stid->sc_stateid.si_opaque.so_id = new_id; |
486 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 487 | /* Will be incremented before return to client: */ |
72c0b0fb | 488 | atomic_set(&stid->sc_count, 1); |
996e0938 | 489 | |
996e0938 | 490 | /* |
3abdb607 BF |
491 | * It shouldn't be a problem to reuse an opaque stateid value. |
492 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
493 | * example, a stray write retransmission could be accepted by | |
494 | * the server when it should have been rejected. Therefore, | |
495 | * adopt a trick from the sctp code to attempt to maximize the | |
496 | * amount of time until an id is reused, by ensuring they always | |
497 | * "increase" (mod INT_MAX): | |
996e0938 | 498 | */ |
3abdb607 BF |
499 | return stid; |
500 | out_free: | |
2c44a234 | 501 | kmem_cache_free(slab, stid); |
3abdb607 | 502 | return NULL; |
2a74aba7 BF |
503 | } |
504 | ||
b49e084d | 505 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 506 | { |
6011695d TM |
507 | struct nfs4_stid *stid; |
508 | struct nfs4_ol_stateid *stp; | |
509 | ||
510 | stid = nfs4_alloc_stid(clp, stateid_slab); | |
511 | if (!stid) | |
512 | return NULL; | |
513 | ||
514 | stp = openlockstateid(stid); | |
515 | stp->st_stid.sc_free = nfs4_free_ol_stateid; | |
516 | return stp; | |
517 | } | |
518 | ||
519 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
520 | { | |
6011695d TM |
521 | kmem_cache_free(deleg_slab, stid); |
522 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
523 | } |
524 | ||
6282cd56 N |
525 | /* |
526 | * When we recall a delegation, we should be careful not to hand it | |
527 | * out again straight away. | |
528 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
529 | * in which the filehandles of recalled delegations are "stored". | |
530 | * If a filehandle appear in either filter, a delegation is blocked. | |
531 | * When a delegation is recalled, the filehandle is stored in the "new" | |
532 | * filter. | |
533 | * Every 30 seconds we swap the filters and clear the "new" one, | |
534 | * unless both are empty of course. | |
535 | * | |
536 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
537 | * low 3 bytes as hash-table indices. | |
538 | * | |
f54fe962 | 539 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
540 | * is used to manage concurrent access. Testing does not need the lock |
541 | * except when swapping the two filters. | |
542 | */ | |
f54fe962 | 543 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
544 | static struct bloom_pair { |
545 | int entries, old_entries; | |
546 | time_t swap_time; | |
547 | int new; /* index into 'set' */ | |
548 | DECLARE_BITMAP(set[2], 256); | |
549 | } blocked_delegations; | |
550 | ||
551 | static int delegation_blocked(struct knfsd_fh *fh) | |
552 | { | |
553 | u32 hash; | |
554 | struct bloom_pair *bd = &blocked_delegations; | |
555 | ||
556 | if (bd->entries == 0) | |
557 | return 0; | |
558 | if (seconds_since_boot() - bd->swap_time > 30) { | |
f54fe962 | 559 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
560 | if (seconds_since_boot() - bd->swap_time > 30) { |
561 | bd->entries -= bd->old_entries; | |
562 | bd->old_entries = bd->entries; | |
563 | memset(bd->set[bd->new], 0, | |
564 | sizeof(bd->set[0])); | |
565 | bd->new = 1-bd->new; | |
566 | bd->swap_time = seconds_since_boot(); | |
567 | } | |
f54fe962 | 568 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
569 | } |
570 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
571 | if (test_bit(hash&255, bd->set[0]) && | |
572 | test_bit((hash>>8)&255, bd->set[0]) && | |
573 | test_bit((hash>>16)&255, bd->set[0])) | |
574 | return 1; | |
575 | ||
576 | if (test_bit(hash&255, bd->set[1]) && | |
577 | test_bit((hash>>8)&255, bd->set[1]) && | |
578 | test_bit((hash>>16)&255, bd->set[1])) | |
579 | return 1; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | static void block_delegations(struct knfsd_fh *fh) | |
585 | { | |
586 | u32 hash; | |
587 | struct bloom_pair *bd = &blocked_delegations; | |
588 | ||
589 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
590 | ||
f54fe962 | 591 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
592 | __set_bit(hash&255, bd->set[bd->new]); |
593 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
594 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
595 | if (bd->entries == 0) | |
596 | bd->swap_time = seconds_since_boot(); | |
597 | bd->entries += 1; | |
f54fe962 | 598 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
599 | } |
600 | ||
1da177e4 | 601 | static struct nfs4_delegation * |
f9416e28 | 602 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) |
1da177e4 LT |
603 | { |
604 | struct nfs4_delegation *dp; | |
02a3508d | 605 | long n; |
1da177e4 LT |
606 | |
607 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
608 | n = atomic_long_inc_return(&num_delegations); |
609 | if (n < 0 || n > max_delegations) | |
610 | goto out_dec; | |
6282cd56 | 611 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 612 | goto out_dec; |
996e0938 | 613 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 614 | if (dp == NULL) |
02a3508d | 615 | goto out_dec; |
6011695d TM |
616 | |
617 | dp->dl_stid.sc_free = nfs4_free_deleg; | |
2a74aba7 BF |
618 | /* |
619 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
620 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
621 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
622 | */ |
623 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
624 | INIT_LIST_HEAD(&dp->dl_perfile); |
625 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 626 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
99c41515 | 627 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
02e1215f | 628 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); |
1da177e4 | 629 | return dp; |
02a3508d TM |
630 | out_dec: |
631 | atomic_long_dec(&num_delegations); | |
632 | return NULL; | |
1da177e4 LT |
633 | } |
634 | ||
635 | void | |
6011695d | 636 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 637 | { |
11b9164a | 638 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
639 | struct nfs4_client *clp = s->sc_client; |
640 | ||
4770d722 JL |
641 | might_lock(&clp->cl_lock); |
642 | ||
643 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) | |
6011695d TM |
644 | return; |
645 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
4770d722 | 646 | spin_unlock(&clp->cl_lock); |
6011695d | 647 | s->sc_free(s); |
11b9164a TM |
648 | if (fp) |
649 | put_nfs4_file(fp); | |
1da177e4 LT |
650 | } |
651 | ||
acfdf5c3 | 652 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 653 | { |
417c6629 JL |
654 | lockdep_assert_held(&state_lock); |
655 | ||
cbf7a75b BF |
656 | if (!fp->fi_lease) |
657 | return; | |
acfdf5c3 BF |
658 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
659 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
660 | fp->fi_lease = NULL; | |
4ee63624 | 661 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
662 | fp->fi_deleg_file = NULL; |
663 | } | |
1da177e4 LT |
664 | } |
665 | ||
6136d2b4 BF |
666 | static void unhash_stid(struct nfs4_stid *s) |
667 | { | |
3abdb607 | 668 | s->sc_type = 0; |
6136d2b4 BF |
669 | } |
670 | ||
931ee56c BH |
671 | static void |
672 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
673 | { | |
cdc97505 | 674 | lockdep_assert_held(&state_lock); |
417c6629 | 675 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 676 | |
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 | ||
6b180f0b JL |
893 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
894 | { | |
895 | if (!atomic_dec_and_test(&sop->so_count)) | |
896 | return; | |
897 | kfree(sop->so_owner.data); | |
898 | sop->so_ops->so_free(sop); | |
899 | } | |
900 | ||
dcef0413 | 901 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 902 | { |
11b9164a | 903 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 904 | |
1c755dc1 JL |
905 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
906 | ||
1d31a253 | 907 | spin_lock(&fp->fi_lock); |
529d7b2a | 908 | list_del(&stp->st_perfile); |
1d31a253 | 909 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
910 | list_del(&stp->st_perstateowner); |
911 | } | |
912 | ||
6011695d | 913 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 914 | { |
6011695d | 915 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 916 | |
6011695d | 917 | release_all_access(stp); |
6011695d | 918 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
919 | } |
920 | ||
b49e084d | 921 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 922 | { |
b49e084d JL |
923 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
924 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
529d7b2a BF |
925 | struct file *file; |
926 | ||
b49e084d JL |
927 | file = find_any_file(stp->st_stid.sc_file); |
928 | if (file) | |
929 | filp_close(file, (fl_owner_t)lo); | |
930 | nfs4_free_ol_stateid(stid); | |
931 | } | |
932 | ||
933 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) | |
934 | { | |
1c755dc1 JL |
935 | struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); |
936 | ||
937 | spin_lock(&oo->oo_owner.so_client->cl_lock); | |
3c87b9b7 | 938 | list_del(&stp->st_locks); |
529d7b2a | 939 | unhash_generic_stateid(stp); |
6136d2b4 | 940 | unhash_stid(&stp->st_stid); |
1c755dc1 | 941 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
6011695d | 942 | nfs4_put_stid(&stp->st_stid); |
529d7b2a BF |
943 | } |
944 | ||
fe0750e5 | 945 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 946 | { |
dcef0413 | 947 | struct nfs4_ol_stateid *stp; |
529d7b2a | 948 | |
fe0750e5 | 949 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
950 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
951 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 952 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 953 | __release_lock_stateid(stp); |
529d7b2a BF |
954 | } |
955 | } | |
956 | ||
fe0750e5 | 957 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 958 | { |
fe0750e5 | 959 | unhash_lockowner(lo); |
6b180f0b | 960 | nfs4_put_stateowner(&lo->lo_owner); |
529d7b2a BF |
961 | } |
962 | ||
3c87b9b7 TM |
963 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
964 | { | |
965 | if (list_empty(&lo->lo_owner.so_stateids)) | |
966 | release_lockowner(lo); | |
967 | } | |
968 | ||
969 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 970 | { |
fe0750e5 | 971 | struct nfs4_lockowner *lo; |
529d7b2a | 972 | |
3c87b9b7 TM |
973 | lo = lockowner(stp->st_stateowner); |
974 | __release_lock_stateid(stp); | |
975 | release_lockowner_if_empty(lo); | |
976 | } | |
977 | ||
978 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
1c755dc1 JL |
979 | __releases(&open_stp->st_stateowner->so_client->cl_lock) |
980 | __acquires(&open_stp->st_stateowner->so_client->cl_lock) | |
3c87b9b7 TM |
981 | { |
982 | struct nfs4_ol_stateid *stp; | |
983 | ||
984 | while (!list_empty(&open_stp->st_locks)) { | |
985 | stp = list_entry(open_stp->st_locks.next, | |
986 | struct nfs4_ol_stateid, st_locks); | |
1c755dc1 | 987 | spin_unlock(&open_stp->st_stateowner->so_client->cl_lock); |
3c87b9b7 | 988 | release_lock_stateid(stp); |
1c755dc1 | 989 | spin_lock(&open_stp->st_stateowner->so_client->cl_lock); |
529d7b2a BF |
990 | } |
991 | } | |
992 | ||
38c387b5 | 993 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f | 994 | { |
1c755dc1 | 995 | spin_lock(&stp->st_stateowner->so_client->cl_lock); |
2283963f | 996 | unhash_generic_stateid(stp); |
3c87b9b7 | 997 | release_open_stateid_locks(stp); |
1c755dc1 | 998 | spin_unlock(&stp->st_stateowner->so_client->cl_lock); |
38c387b5 BF |
999 | } |
1000 | ||
1001 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1002 | { | |
1003 | unhash_open_stateid(stp); | |
6011695d | 1004 | nfs4_put_stid(&stp->st_stid); |
2283963f BF |
1005 | } |
1006 | ||
fe0750e5 | 1007 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1008 | { |
dcef0413 | 1009 | struct nfs4_ol_stateid *stp; |
f1d110ca | 1010 | |
fe0750e5 BF |
1011 | list_del(&oo->oo_owner.so_strhash); |
1012 | list_del(&oo->oo_perclient); | |
1013 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
1014 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 1015 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 1016 | release_open_stateid(stp); |
f1d110ca BF |
1017 | } |
1018 | } | |
1019 | ||
f7a4d872 BF |
1020 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1021 | { | |
1022 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
1023 | ||
1024 | if (s) { | |
6011695d | 1025 | nfs4_put_stid(&s->st_stid); |
f7a4d872 BF |
1026 | oo->oo_last_closed_stid = NULL; |
1027 | } | |
1028 | } | |
1029 | ||
fe0750e5 | 1030 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 1031 | { |
fe0750e5 BF |
1032 | unhash_openowner(oo); |
1033 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 1034 | release_last_closed_stateid(oo); |
6b180f0b | 1035 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1036 | } |
1037 | ||
5282fd72 ME |
1038 | static inline int |
1039 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1040 | { | |
1041 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1042 | ||
1043 | return sid->sequence % SESSION_HASH_SIZE; | |
1044 | } | |
1045 | ||
8f199b82 | 1046 | #ifdef NFSD_DEBUG |
5282fd72 ME |
1047 | static inline void |
1048 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1049 | { | |
1050 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1051 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1052 | } | |
8f199b82 TM |
1053 | #else |
1054 | static inline void | |
1055 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1056 | { | |
1057 | } | |
1058 | #endif | |
1059 | ||
9411b1d4 BF |
1060 | /* |
1061 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1062 | * won't be used for replay. | |
1063 | */ | |
1064 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1065 | { | |
1066 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1067 | ||
1068 | if (nfserr == nfserr_replay_me) | |
1069 | return; | |
1070 | ||
1071 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1072 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1073 | return; |
1074 | } | |
1075 | if (!so) | |
1076 | return; | |
1077 | if (so->so_is_open_owner) | |
1078 | release_last_closed_stateid(openowner(so)); | |
1079 | so->so_seqid++; | |
1080 | return; | |
1081 | } | |
5282fd72 | 1082 | |
ec6b5d7b AA |
1083 | static void |
1084 | gen_sessionid(struct nfsd4_session *ses) | |
1085 | { | |
1086 | struct nfs4_client *clp = ses->se_client; | |
1087 | struct nfsd4_sessionid *sid; | |
1088 | ||
1089 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1090 | sid->clientid = clp->cl_clientid; | |
1091 | sid->sequence = current_sessionid++; | |
1092 | sid->reserved = 0; | |
1093 | } | |
1094 | ||
1095 | /* | |
a649637c AA |
1096 | * The protocol defines ca_maxresponssize_cached to include the size of |
1097 | * the rpc header, but all we need to cache is the data starting after | |
1098 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1099 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1100 | * value that is the number of bytes in our cache plus a few additional | |
1101 | * bytes. In order to stay on the safe side, and not promise more than | |
1102 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1103 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1104 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1105 | * for the SEQUENCE op response: | |
1106 | */ | |
1107 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1108 | ||
557ce264 AA |
1109 | static void |
1110 | free_session_slots(struct nfsd4_session *ses) | |
1111 | { | |
1112 | int i; | |
1113 | ||
1114 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1115 | kfree(ses->se_slots[i]); | |
1116 | } | |
1117 | ||
a649637c | 1118 | /* |
efe0cb6d BF |
1119 | * We don't actually need to cache the rpc and session headers, so we |
1120 | * can allocate a little less for each slot: | |
1121 | */ | |
55c760cf | 1122 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1123 | { |
55c760cf | 1124 | u32 size; |
efe0cb6d | 1125 | |
55c760cf BF |
1126 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1127 | size = 0; | |
1128 | else | |
1129 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1130 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1131 | } |
ec6b5d7b | 1132 | |
5b6feee9 BF |
1133 | /* |
1134 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1135 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1136 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1137 | */ |
55c760cf | 1138 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1139 | { |
55c760cf BF |
1140 | u32 slotsize = slot_bytes(ca); |
1141 | u32 num = ca->maxreqs; | |
5b6feee9 | 1142 | int avail; |
ec6b5d7b | 1143 | |
5b6feee9 | 1144 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1145 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1146 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1147 | num = min_t(int, num, avail / slotsize); |
1148 | nfsd_drc_mem_used += num * slotsize; | |
1149 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1150 | |
5b6feee9 BF |
1151 | return num; |
1152 | } | |
ec6b5d7b | 1153 | |
55c760cf | 1154 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1155 | { |
55c760cf BF |
1156 | int slotsize = slot_bytes(ca); |
1157 | ||
4bd9b0f4 | 1158 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1159 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1160 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1161 | } |
ec6b5d7b | 1162 | |
60810e54 KM |
1163 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1164 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1165 | { |
60810e54 KM |
1166 | int numslots = fattrs->maxreqs; |
1167 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1168 | struct nfsd4_session *new; |
1169 | int mem, i; | |
a649637c | 1170 | |
5b6feee9 BF |
1171 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1172 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1173 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1174 | |
5b6feee9 BF |
1175 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1176 | if (!new) | |
1177 | return NULL; | |
557ce264 | 1178 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1179 | for (i = 0; i < numslots; i++) { |
55c760cf | 1180 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1181 | if (!new->se_slots[i]) |
557ce264 | 1182 | goto out_free; |
557ce264 | 1183 | } |
60810e54 KM |
1184 | |
1185 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1186 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1187 | ||
5b6feee9 BF |
1188 | return new; |
1189 | out_free: | |
1190 | while (i--) | |
1191 | kfree(new->se_slots[i]); | |
1192 | kfree(new); | |
1193 | return NULL; | |
ec6b5d7b AA |
1194 | } |
1195 | ||
19cf5c02 BF |
1196 | static void free_conn(struct nfsd4_conn *c) |
1197 | { | |
1198 | svc_xprt_put(c->cn_xprt); | |
1199 | kfree(c); | |
1200 | } | |
ec6b5d7b | 1201 | |
19cf5c02 BF |
1202 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1203 | { | |
1204 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1205 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1206 | |
19cf5c02 BF |
1207 | spin_lock(&clp->cl_lock); |
1208 | if (!list_empty(&c->cn_persession)) { | |
1209 | list_del(&c->cn_persession); | |
1210 | free_conn(c); | |
1211 | } | |
eea49806 | 1212 | nfsd4_probe_callback(clp); |
2e4b7239 | 1213 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1214 | } |
ec6b5d7b | 1215 | |
d29c374c | 1216 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1217 | { |
c7662518 | 1218 | struct nfsd4_conn *conn; |
ec6b5d7b | 1219 | |
c7662518 BF |
1220 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1221 | if (!conn) | |
db90681d | 1222 | return NULL; |
c7662518 BF |
1223 | svc_xprt_get(rqstp->rq_xprt); |
1224 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1225 | conn->cn_flags = flags; |
db90681d BF |
1226 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1227 | return conn; | |
1228 | } | |
a649637c | 1229 | |
328ead28 BF |
1230 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1231 | { | |
1232 | conn->cn_session = ses; | |
1233 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1234 | } |
1235 | ||
db90681d | 1236 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1237 | { |
db90681d | 1238 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1239 | |
c7662518 | 1240 | spin_lock(&clp->cl_lock); |
328ead28 | 1241 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1242 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1243 | } |
1244 | ||
21b75b01 | 1245 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1246 | { |
19cf5c02 | 1247 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1248 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1249 | } |
1250 | ||
e1ff371f | 1251 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1252 | { |
21b75b01 | 1253 | int ret; |
ec6b5d7b | 1254 | |
db90681d | 1255 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1256 | ret = nfsd4_register_conn(conn); |
1257 | if (ret) | |
1258 | /* oops; xprt is already down: */ | |
1259 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1260 | /* We may have gained or lost a callback channel: */ |
1261 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1262 | } |
ec6b5d7b | 1263 | |
e1ff371f | 1264 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1265 | { |
1266 | u32 dir = NFS4_CDFC4_FORE; | |
1267 | ||
e1ff371f | 1268 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1269 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1270 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1271 | } |
1272 | ||
1273 | /* must be called under client_lock */ | |
19cf5c02 | 1274 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1275 | { |
19cf5c02 BF |
1276 | struct nfs4_client *clp = s->se_client; |
1277 | struct nfsd4_conn *c; | |
ec6b5d7b | 1278 | |
19cf5c02 BF |
1279 | spin_lock(&clp->cl_lock); |
1280 | while (!list_empty(&s->se_conns)) { | |
1281 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1282 | list_del_init(&c->cn_persession); | |
1283 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1284 | |
19cf5c02 BF |
1285 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1286 | free_conn(c); | |
ec6b5d7b | 1287 | |
19cf5c02 BF |
1288 | spin_lock(&clp->cl_lock); |
1289 | } | |
1290 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1291 | } |
ec6b5d7b | 1292 | |
1377b69e BF |
1293 | static void __free_session(struct nfsd4_session *ses) |
1294 | { | |
1377b69e BF |
1295 | free_session_slots(ses); |
1296 | kfree(ses); | |
1297 | } | |
1298 | ||
66b2b9b2 | 1299 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1300 | { |
66b2b9b2 | 1301 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1302 | |
1303 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1304 | nfsd4_del_conns(ses); |
55c760cf | 1305 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1306 | __free_session(ses); |
c7662518 BF |
1307 | } |
1308 | ||
135ae827 | 1309 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1310 | { |
a827bcb2 | 1311 | int idx; |
1872de0e | 1312 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1313 | |
ec6b5d7b AA |
1314 | new->se_client = clp; |
1315 | gen_sessionid(new); | |
ec6b5d7b | 1316 | |
c7662518 BF |
1317 | INIT_LIST_HEAD(&new->se_conns); |
1318 | ||
ac7c46f2 | 1319 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1320 | new->se_flags = cses->flags; |
8b5ce5cd | 1321 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1322 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1323 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1324 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1325 | spin_lock(&nn->client_lock); |
1872de0e | 1326 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1327 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1328 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1329 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1330 | spin_unlock(&nn->client_lock); |
60810e54 | 1331 | |
dcbeaa68 | 1332 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1333 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1334 | /* |
1335 | * This is a little silly; with sessions there's no real | |
1336 | * use for the callback address. Use the peer address | |
1337 | * as a reasonable default for now, but consider fixing | |
1338 | * the rpc client not to require an address in the | |
1339 | * future: | |
1340 | */ | |
edd76786 BF |
1341 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1342 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1343 | } |
ec6b5d7b AA |
1344 | } |
1345 | ||
9089f1b4 | 1346 | /* caller must hold client_lock */ |
5282fd72 | 1347 | static struct nfsd4_session * |
d4e19e70 | 1348 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1349 | { |
1350 | struct nfsd4_session *elem; | |
1351 | int idx; | |
1872de0e | 1352 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1353 | |
1354 | dump_sessionid(__func__, sessionid); | |
1355 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1356 | /* Search in the appropriate list */ |
1872de0e | 1357 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1358 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1359 | NFS4_MAX_SESSIONID_LEN)) { | |
1360 | return elem; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | dprintk("%s: session not found\n", __func__); | |
1365 | return NULL; | |
1366 | } | |
1367 | ||
d4e19e70 TM |
1368 | static struct nfsd4_session * |
1369 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1370 | __be32 *ret) | |
1371 | { | |
1372 | struct nfsd4_session *session; | |
1373 | __be32 status = nfserr_badsession; | |
1374 | ||
1375 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1376 | if (!session) | |
1377 | goto out; | |
1378 | status = nfsd4_get_session_locked(session); | |
1379 | if (status) | |
1380 | session = NULL; | |
1381 | out: | |
1382 | *ret = status; | |
1383 | return session; | |
1384 | } | |
1385 | ||
9089f1b4 | 1386 | /* caller must hold client_lock */ |
7116ed6b | 1387 | static void |
5282fd72 | 1388 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1389 | { |
1390 | list_del(&ses->se_hash); | |
4c649378 | 1391 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1392 | list_del(&ses->se_perclnt); |
4c649378 | 1393 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1394 | } |
1395 | ||
1da177e4 LT |
1396 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1397 | static int | |
2c142baa | 1398 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1399 | { |
2c142baa | 1400 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1401 | return 0; |
60adfc50 | 1402 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1403 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1404 | return 1; |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * XXX Should we use a slab cache ? | |
1409 | * This type of memory management is somewhat inefficient, but we use it | |
1410 | * anyway since SETCLIENTID is not a common operation. | |
1411 | */ | |
35bba9a3 | 1412 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1413 | { |
1414 | struct nfs4_client *clp; | |
1415 | ||
35bba9a3 BF |
1416 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1417 | if (clp == NULL) | |
1418 | return NULL; | |
67114fe6 | 1419 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1420 | if (clp->cl_name.data == NULL) { |
1421 | kfree(clp); | |
1422 | return NULL; | |
1da177e4 | 1423 | } |
35bba9a3 | 1424 | clp->cl_name.len = name.len; |
5694c93e TM |
1425 | INIT_LIST_HEAD(&clp->cl_sessions); |
1426 | idr_init(&clp->cl_stateids); | |
1427 | atomic_set(&clp->cl_refcount, 0); | |
1428 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1429 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1430 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1431 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1432 | INIT_LIST_HEAD(&clp->cl_lru); | |
1433 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1434 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1435 | spin_lock_init(&clp->cl_lock); | |
1436 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1437 | return clp; |
1438 | } | |
1439 | ||
4dd86e15 | 1440 | static void |
1da177e4 LT |
1441 | free_client(struct nfs4_client *clp) |
1442 | { | |
bca0ec65 | 1443 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1444 | |
1445 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1446 | while (!list_empty(&clp->cl_sessions)) { |
1447 | struct nfsd4_session *ses; | |
1448 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1449 | se_perclnt); | |
1450 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1451 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1452 | free_session(ses); | |
792c95dd | 1453 | } |
4cb57e30 | 1454 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1455 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1456 | kfree(clp->cl_name.data); |
2d32b29a | 1457 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1458 | kfree(clp); |
1459 | } | |
1460 | ||
84d38ac9 BH |
1461 | /* must be called under the client_lock */ |
1462 | static inline void | |
1463 | unhash_client_locked(struct nfs4_client *clp) | |
1464 | { | |
792c95dd BF |
1465 | struct nfsd4_session *ses; |
1466 | ||
84d38ac9 | 1467 | list_del(&clp->cl_lru); |
4c649378 | 1468 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1469 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1470 | list_del_init(&ses->se_hash); | |
4c649378 | 1471 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1472 | } |
1473 | ||
1da177e4 | 1474 | static void |
0d22f68f | 1475 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1476 | { |
fe0750e5 | 1477 | struct nfs4_openowner *oo; |
1da177e4 | 1478 | struct nfs4_delegation *dp; |
1da177e4 | 1479 | struct list_head reaplist; |
382a62e7 | 1480 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1481 | |
1da177e4 | 1482 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1483 | spin_lock(&state_lock); |
ea1da636 N |
1484 | while (!list_empty(&clp->cl_delegations)) { |
1485 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
42690676 JL |
1486 | unhash_delegation_locked(dp); |
1487 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 1488 | } |
cdc97505 | 1489 | spin_unlock(&state_lock); |
1da177e4 LT |
1490 | while (!list_empty(&reaplist)) { |
1491 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 1492 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1493 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 | 1494 | } |
2d4a532d | 1495 | while (!list_empty(&clp->cl_revoked)) { |
956c4fee | 1496 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 1497 | list_del_init(&dp->dl_recall_lru); |
6011695d | 1498 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 1499 | } |
ea1da636 | 1500 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1501 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1502 | release_openowner(oo); | |
1da177e4 | 1503 | } |
6ff8da08 | 1504 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1505 | if (clp->cl_cb_conn.cb_xprt) |
1506 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1507 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1508 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1509 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1510 | else |
a99454aa | 1511 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1512 | spin_lock(&nn->client_lock); |
84d38ac9 | 1513 | unhash_client_locked(clp); |
221a6876 BF |
1514 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1515 | free_client(clp); | |
c9a49628 | 1516 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1517 | } |
1518 | ||
0d22f68f BF |
1519 | static void expire_client(struct nfs4_client *clp) |
1520 | { | |
1521 | nfsd4_client_record_remove(clp); | |
1522 | destroy_client(clp); | |
1523 | } | |
1524 | ||
35bba9a3 BF |
1525 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1526 | { | |
1527 | memcpy(target->cl_verifier.data, source->data, | |
1528 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1529 | } |
1530 | ||
35bba9a3 BF |
1531 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1532 | { | |
1da177e4 LT |
1533 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1534 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1535 | } | |
1536 | ||
03a4e1f6 | 1537 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1538 | { |
03a4e1f6 BF |
1539 | if (source->cr_principal) { |
1540 | target->cr_principal = | |
1541 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1542 | if (target->cr_principal == NULL) | |
1543 | return -ENOMEM; | |
1544 | } else | |
1545 | target->cr_principal = NULL; | |
d5497fc6 | 1546 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1547 | target->cr_uid = source->cr_uid; |
1548 | target->cr_gid = source->cr_gid; | |
1549 | target->cr_group_info = source->cr_group_info; | |
1550 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1551 | target->cr_gss_mech = source->cr_gss_mech; |
1552 | if (source->cr_gss_mech) | |
1553 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1554 | return 0; |
1da177e4 LT |
1555 | } |
1556 | ||
ac55fdc4 JL |
1557 | static long long |
1558 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1559 | { | |
1560 | long long res; | |
1561 | ||
1562 | res = o1->len - o2->len; | |
1563 | if (res) | |
1564 | return res; | |
1565 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1566 | } | |
1567 | ||
35bba9a3 | 1568 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1569 | { |
a55370a3 | 1570 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1571 | } |
1572 | ||
1573 | static int | |
599e0a22 BF |
1574 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1575 | { | |
1576 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1577 | } |
1578 | ||
1579 | static int | |
599e0a22 BF |
1580 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1581 | { | |
1582 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1583 | } |
1584 | ||
8fbba96e BF |
1585 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1586 | { | |
1587 | int i; | |
1588 | ||
1589 | if (g1->ngroups != g2->ngroups) | |
1590 | return false; | |
1591 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1592 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1593 | return false; |
1594 | return true; | |
1595 | } | |
1596 | ||
68eb3508 BF |
1597 | /* |
1598 | * RFC 3530 language requires clid_inuse be returned when the | |
1599 | * "principal" associated with a requests differs from that previously | |
1600 | * used. We use uid, gid's, and gss principal string as our best | |
1601 | * approximation. We also don't want to allow non-gss use of a client | |
1602 | * established using gss: in theory cr_principal should catch that | |
1603 | * change, but in practice cr_principal can be null even in the gss case | |
1604 | * since gssd doesn't always pass down a principal string. | |
1605 | */ | |
1606 | static bool is_gss_cred(struct svc_cred *cr) | |
1607 | { | |
1608 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1609 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1610 | } | |
1611 | ||
1612 | ||
5559b50a | 1613 | static bool |
599e0a22 BF |
1614 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1615 | { | |
68eb3508 | 1616 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1617 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1618 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1619 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1620 | return false; | |
1621 | if (cr1->cr_principal == cr2->cr_principal) | |
1622 | return true; | |
1623 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1624 | return false; | |
5559b50a | 1625 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1626 | } |
1627 | ||
57266a6e BF |
1628 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1629 | { | |
1630 | struct svc_cred *cr = &rqstp->rq_cred; | |
1631 | u32 service; | |
1632 | ||
c4720591 BF |
1633 | if (!cr->cr_gss_mech) |
1634 | return false; | |
57266a6e BF |
1635 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1636 | return service == RPC_GSS_SVC_INTEGRITY || | |
1637 | service == RPC_GSS_SVC_PRIVACY; | |
1638 | } | |
1639 | ||
1640 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1641 | { | |
1642 | struct svc_cred *cr = &rqstp->rq_cred; | |
1643 | ||
1644 | if (!cl->cl_mach_cred) | |
1645 | return true; | |
1646 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1647 | return false; | |
1648 | if (!svc_rqst_integrity_protected(rqstp)) | |
1649 | return false; | |
1650 | if (!cr->cr_principal) | |
1651 | return false; | |
1652 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1653 | } | |
1654 | ||
c212cecf | 1655 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1656 | { |
1657 | static u32 current_clientid = 1; | |
1658 | ||
2c142baa | 1659 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1660 | clp->cl_clientid.cl_id = current_clientid++; |
1661 | } | |
1662 | ||
deda2faa BF |
1663 | static void gen_confirm(struct nfs4_client *clp) |
1664 | { | |
ab4684d1 | 1665 | __be32 verf[2]; |
deda2faa | 1666 | static u32 i; |
1da177e4 | 1667 | |
f419992c JL |
1668 | /* |
1669 | * This is opaque to client, so no need to byte-swap. Use | |
1670 | * __force to keep sparse happy | |
1671 | */ | |
1672 | verf[0] = (__force __be32)get_seconds(); | |
1673 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1674 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1675 | } |
1676 | ||
4770d722 JL |
1677 | static struct nfs4_stid * |
1678 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 1679 | { |
3abdb607 BF |
1680 | struct nfs4_stid *ret; |
1681 | ||
1682 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1683 | if (!ret || !ret->sc_type) | |
1684 | return NULL; | |
1685 | return ret; | |
4d71ab87 BF |
1686 | } |
1687 | ||
4770d722 JL |
1688 | static struct nfs4_stid * |
1689 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
1690 | { |
1691 | struct nfs4_stid *s; | |
4d71ab87 | 1692 | |
4770d722 JL |
1693 | spin_lock(&cl->cl_lock); |
1694 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
1695 | if (s != NULL) { |
1696 | if (typemask & s->sc_type) | |
1697 | atomic_inc(&s->sc_count); | |
1698 | else | |
1699 | s = NULL; | |
1700 | } | |
4770d722 JL |
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; | |
58fb12e6 JL |
2943 | mutex_init(&rp->rp_mutex); |
2944 | } | |
2945 | ||
2946 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
2947 | struct nfs4_stateowner *so) | |
2948 | { | |
2949 | if (!nfsd4_has_session(cstate)) { | |
2950 | mutex_lock(&so->so_replay.rp_mutex); | |
2951 | cstate->replay_owner = so; | |
2952 | atomic_inc(&so->so_count); | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
2957 | { | |
2958 | struct nfs4_stateowner *so = cstate->replay_owner; | |
2959 | ||
2960 | if (so != NULL) { | |
2961 | cstate->replay_owner = NULL; | |
2962 | mutex_unlock(&so->so_replay.rp_mutex); | |
2963 | nfs4_put_stateowner(so); | |
2964 | } | |
1da177e4 LT |
2965 | } |
2966 | ||
fe0750e5 | 2967 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2968 | { |
1da177e4 | 2969 | struct nfs4_stateowner *sop; |
1da177e4 | 2970 | |
fe0750e5 | 2971 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2972 | if (!sop) |
2973 | return NULL; | |
2974 | ||
2975 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2976 | if (!sop->so_owner.data) { | |
fe0750e5 | 2977 | kmem_cache_free(slab, sop); |
1da177e4 | 2978 | return NULL; |
ff194bd9 BF |
2979 | } |
2980 | sop->so_owner.len = owner->len; | |
2981 | ||
ea1da636 | 2982 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2983 | sop->so_client = clp; |
2984 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 2985 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
2986 | return sop; |
2987 | } | |
2988 | ||
fe0750e5 | 2989 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2990 | { |
9b531137 SK |
2991 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2992 | ||
2993 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2994 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2995 | } |
2996 | ||
6b180f0b JL |
2997 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
2998 | { | |
2999 | struct nfs4_openowner *oo = openowner(so); | |
3000 | ||
3001 | kmem_cache_free(openowner_slab, oo); | |
3002 | } | |
3003 | ||
3004 | static const struct nfs4_stateowner_operations openowner_ops = { | |
3005 | .so_free = nfs4_free_openowner, | |
3006 | }; | |
3007 | ||
fe0750e5 | 3008 | static struct nfs4_openowner * |
13d6f66b | 3009 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
3010 | struct nfsd4_compound_state *cstate) |
3011 | { | |
13d6f66b | 3012 | struct nfs4_client *clp = cstate->clp; |
fe0750e5 | 3013 | struct nfs4_openowner *oo; |
ff194bd9 | 3014 | |
fe0750e5 BF |
3015 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
3016 | if (!oo) | |
ff194bd9 | 3017 | return NULL; |
6b180f0b | 3018 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
3019 | oo->oo_owner.so_is_open_owner = 1; |
3020 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 3021 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
3022 | if (nfsd4_has_session(cstate)) |
3023 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 3024 | oo->oo_time = 0; |
38c387b5 | 3025 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
3026 | INIT_LIST_HEAD(&oo->oo_close_lru); |
3027 | hash_openowner(oo, clp, strhashval); | |
3028 | return oo; | |
1da177e4 LT |
3029 | } |
3030 | ||
996e0938 | 3031 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 3032 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3033 | |
d6f2bc5d | 3034 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 3035 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 3036 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 3037 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 3038 | get_nfs4_file(fp); |
11b9164a | 3039 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
3040 | stp->st_access_bmap = 0; |
3041 | stp->st_deny_bmap = 0; | |
4c4cd222 | 3042 | stp->st_openstp = NULL; |
1c755dc1 JL |
3043 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
3044 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); | |
1d31a253 TM |
3045 | spin_lock(&fp->fi_lock); |
3046 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
3047 | spin_unlock(&fp->fi_lock); | |
1c755dc1 | 3048 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
1da177e4 LT |
3049 | } |
3050 | ||
fd39ca9a | 3051 | static void |
73758fed | 3052 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 3053 | { |
73758fed SK |
3054 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3055 | ||
fe0750e5 | 3056 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 3057 | |
73758fed | 3058 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 3059 | oo->oo_time = get_seconds(); |
1da177e4 LT |
3060 | } |
3061 | ||
1da177e4 | 3062 | static int |
599e0a22 BF |
3063 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
3064 | clientid_t *clid) | |
3065 | { | |
3066 | return (sop->so_owner.len == owner->len) && | |
3067 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
3068 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
3069 | } |
3070 | ||
fe0750e5 | 3071 | static struct nfs4_openowner * |
9b531137 SK |
3072 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
3073 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 3074 | { |
a50d2ad1 BF |
3075 | struct nfs4_stateowner *so; |
3076 | struct nfs4_openowner *oo; | |
d15c077e | 3077 | struct nfs4_client *clp; |
1da177e4 | 3078 | |
9b531137 | 3079 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
3080 | if (!so->so_is_open_owner) |
3081 | continue; | |
a50d2ad1 BF |
3082 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
3083 | oo = openowner(so); | |
d15c077e BF |
3084 | clp = oo->oo_owner.so_client; |
3085 | if ((bool)clp->cl_minorversion != sessions) | |
3086 | return NULL; | |
a50d2ad1 BF |
3087 | renew_client(oo->oo_owner.so_client); |
3088 | return oo; | |
3089 | } | |
1da177e4 LT |
3090 | } |
3091 | return NULL; | |
3092 | } | |
3093 | ||
3094 | /* search file_hashtbl[] for file */ | |
3095 | static struct nfs4_file * | |
ca943217 | 3096 | find_file_locked(struct knfsd_fh *fh) |
1da177e4 | 3097 | { |
ca943217 | 3098 | unsigned int hashval = file_hashval(fh); |
1da177e4 LT |
3099 | struct nfs4_file *fp; |
3100 | ||
950e0118 TM |
3101 | lockdep_assert_held(&state_lock); |
3102 | ||
89876f8c | 3103 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
ca943217 | 3104 | if (nfsd_fh_match(&fp->fi_fhandle, fh)) { |
13cd2184 | 3105 | get_nfs4_file(fp); |
1da177e4 | 3106 | return fp; |
13cd2184 | 3107 | } |
1da177e4 LT |
3108 | } |
3109 | return NULL; | |
3110 | } | |
3111 | ||
950e0118 | 3112 | static struct nfs4_file * |
ca943217 | 3113 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
3114 | { |
3115 | struct nfs4_file *fp; | |
3116 | ||
3117 | spin_lock(&state_lock); | |
ca943217 | 3118 | fp = find_file_locked(fh); |
950e0118 TM |
3119 | spin_unlock(&state_lock); |
3120 | return fp; | |
3121 | } | |
3122 | ||
3123 | static struct nfs4_file * | |
f9c00c3a | 3124 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
3125 | { |
3126 | struct nfs4_file *fp; | |
3127 | ||
3128 | spin_lock(&state_lock); | |
ca943217 | 3129 | fp = find_file_locked(fh); |
950e0118 | 3130 | if (fp == NULL) { |
f9c00c3a | 3131 | nfsd4_init_file(new, fh); |
950e0118 TM |
3132 | fp = new; |
3133 | } | |
3134 | spin_unlock(&state_lock); | |
3135 | ||
3136 | return fp; | |
3137 | } | |
3138 | ||
1da177e4 LT |
3139 | /* |
3140 | * Called to check deny when READ with all zero stateid or | |
3141 | * WRITE with all zero or all one stateid | |
3142 | */ | |
b37ad28b | 3143 | static __be32 |
1da177e4 LT |
3144 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3145 | { | |
1da177e4 | 3146 | struct nfs4_file *fp; |
baeb4ff0 | 3147 | __be32 ret = nfs_ok; |
1da177e4 | 3148 | |
ca943217 | 3149 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 3150 | if (!fp) |
baeb4ff0 JL |
3151 | return ret; |
3152 | /* Check for conflicting share reservations */ | |
1d31a253 | 3153 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3154 | if (fp->fi_share_deny & deny_type) |
3155 | ret = nfserr_locked; | |
1d31a253 | 3156 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3157 | put_nfs4_file(fp); |
3158 | return ret; | |
1da177e4 LT |
3159 | } |
3160 | ||
02e1215f | 3161 | void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) |
1da177e4 | 3162 | { |
11b9164a TM |
3163 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
3164 | nfsd_net_id); | |
e8c69d17 | 3165 | |
11b9164a | 3166 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 3167 | |
dff1399f | 3168 | /* |
f54fe962 JL |
3169 | * We can't do this in nfsd_break_deleg_cb because it is |
3170 | * already holding inode->i_lock. | |
3171 | * | |
dff1399f JL |
3172 | * If the dl_time != 0, then we know that it has already been |
3173 | * queued for a lease break. Don't queue it again. | |
3174 | */ | |
f54fe962 | 3175 | spin_lock(&state_lock); |
dff1399f | 3176 | if (dp->dl_time == 0) { |
dff1399f | 3177 | dp->dl_time = get_seconds(); |
02e1215f | 3178 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 3179 | } |
02e1215f JL |
3180 | spin_unlock(&state_lock); |
3181 | } | |
1da177e4 | 3182 | |
02e1215f JL |
3183 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
3184 | { | |
3185 | /* | |
3186 | * We're assuming the state code never drops its reference | |
3187 | * without first removing the lease. Since we're in this lease | |
3188 | * callback (and since the lease code is serialized by the kernel | |
3189 | * lock) we know the server hasn't removed the lease yet, we know | |
3190 | * it's safe to take a reference. | |
3191 | */ | |
72c0b0fb | 3192 | atomic_inc(&dp->dl_stid.sc_count); |
6b57d9c8 BF |
3193 | nfsd4_cb_recall(dp); |
3194 | } | |
3195 | ||
1c8c601a | 3196 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3197 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3198 | { | |
acfdf5c3 BF |
3199 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3200 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3201 | |
7fa10cd1 BF |
3202 | if (!fp) { |
3203 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3204 | return; | |
3205 | } | |
3206 | if (fp->fi_had_conflict) { | |
3207 | WARN(1, "duplicate break on %p\n", fp); | |
3208 | return; | |
3209 | } | |
0272e1fd BF |
3210 | /* |
3211 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3212 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3213 | * in time: |
0272e1fd BF |
3214 | */ |
3215 | fl->fl_break_time = 0; | |
1da177e4 | 3216 | |
02e1215f | 3217 | spin_lock(&fp->fi_lock); |
417c6629 JL |
3218 | fp->fi_had_conflict = true; |
3219 | /* | |
3220 | * If there are no delegations on the list, then we can't count on this | |
3221 | * lease ever being cleaned up. Set the fl_break_time to jiffies so that | |
3222 | * time_out_leases will do it ASAP. The fact that fi_had_conflict is now | |
3223 | * true should keep any new delegations from being hashed. | |
3224 | */ | |
3225 | if (list_empty(&fp->fi_delegations)) | |
3226 | fl->fl_break_time = jiffies; | |
3227 | else | |
3228 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3229 | nfsd_break_one_deleg(dp); | |
02e1215f | 3230 | spin_unlock(&fp->fi_lock); |
1da177e4 LT |
3231 | } |
3232 | ||
1da177e4 LT |
3233 | static |
3234 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3235 | { | |
3236 | if (arg & F_UNLCK) | |
3237 | return lease_modify(onlist, arg); | |
3238 | else | |
3239 | return -EAGAIN; | |
3240 | } | |
3241 | ||
7b021967 | 3242 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3243 | .lm_break = nfsd_break_deleg_cb, |
3244 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3245 | }; |
3246 | ||
7a8711c9 BF |
3247 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3248 | { | |
3249 | if (nfsd4_has_session(cstate)) | |
3250 | return nfs_ok; | |
3251 | if (seqid == so->so_seqid - 1) | |
3252 | return nfserr_replay_me; | |
3253 | if (seqid == so->so_seqid) | |
3254 | return nfs_ok; | |
3255 | return nfserr_bad_seqid; | |
3256 | } | |
1da177e4 | 3257 | |
4b24ca7d JL |
3258 | static __be32 lookup_clientid(clientid_t *clid, |
3259 | struct nfsd4_compound_state *cstate, | |
3260 | struct nfsd_net *nn) | |
3261 | { | |
3262 | struct nfs4_client *found; | |
3263 | ||
3264 | if (cstate->clp) { | |
3265 | found = cstate->clp; | |
3266 | if (!same_clid(&found->cl_clientid, clid)) | |
3267 | return nfserr_stale_clientid; | |
3268 | return nfs_ok; | |
3269 | } | |
3270 | ||
3271 | if (STALE_CLIENTID(clid, nn)) | |
3272 | return nfserr_stale_clientid; | |
3273 | ||
3274 | /* | |
3275 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3276 | * cached already then we know this is for is for v4.0 and "sessions" | |
3277 | * will be false. | |
3278 | */ | |
3279 | WARN_ON_ONCE(cstate->session); | |
3280 | found = find_confirmed_client(clid, false, nn); | |
3281 | if (!found) | |
3282 | return nfserr_expired; | |
3283 | ||
3284 | /* Cache the nfs4_client in cstate! */ | |
3285 | cstate->clp = found; | |
3286 | atomic_inc(&found->cl_refcount); | |
3287 | return nfs_ok; | |
3288 | } | |
3289 | ||
b37ad28b | 3290 | __be32 |
6668958f | 3291 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3292 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3293 | { |
1da177e4 LT |
3294 | clientid_t *clientid = &open->op_clientid; |
3295 | struct nfs4_client *clp = NULL; | |
3296 | unsigned int strhashval; | |
fe0750e5 | 3297 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3298 | __be32 status; |
1da177e4 | 3299 | |
2c142baa | 3300 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3301 | return nfserr_stale_clientid; |
32513b40 BF |
3302 | /* |
3303 | * In case we need it later, after we've already created the | |
3304 | * file and don't want to risk a further failure: | |
3305 | */ | |
3306 | open->op_file = nfsd4_alloc_file(); | |
3307 | if (open->op_file == NULL) | |
3308 | return nfserr_jukebox; | |
1da177e4 | 3309 | |
2d91e895 TM |
3310 | status = lookup_clientid(clientid, cstate, nn); |
3311 | if (status) | |
3312 | return status; | |
3313 | clp = cstate->clp; | |
3314 | ||
16bfdaaf | 3315 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3316 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3317 | open->op_openowner = oo; |
3318 | if (!oo) { | |
bcf130f9 | 3319 | goto new_owner; |
1da177e4 | 3320 | } |
dad1c067 | 3321 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3322 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3323 | release_openowner(oo); |
3324 | open->op_openowner = NULL; | |
bcf130f9 | 3325 | goto new_owner; |
0f442aa2 | 3326 | } |
4cdc951b BF |
3327 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3328 | if (status) | |
3329 | return status; | |
4cdc951b | 3330 | goto alloc_stateid; |
bcf130f9 | 3331 | new_owner: |
13d6f66b | 3332 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3333 | if (oo == NULL) |
3334 | return nfserr_jukebox; | |
3335 | open->op_openowner = oo; | |
4cdc951b | 3336 | alloc_stateid: |
b49e084d | 3337 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
3338 | if (!open->op_stp) |
3339 | return nfserr_jukebox; | |
0f442aa2 | 3340 | return nfs_ok; |
1da177e4 LT |
3341 | } |
3342 | ||
b37ad28b | 3343 | static inline __be32 |
4a6e43e6 N |
3344 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3345 | { | |
3346 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3347 | return nfserr_openmode; | |
3348 | else | |
3349 | return nfs_ok; | |
3350 | } | |
3351 | ||
f459e453 | 3352 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3353 | { |
f459e453 | 3354 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3355 | } |
3356 | ||
38c2f4b1 | 3357 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3358 | { |
f459e453 | 3359 | struct nfs4_stid *ret; |
24a0111e | 3360 | |
38c2f4b1 | 3361 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3362 | if (!ret) |
3363 | return NULL; | |
3364 | return delegstateid(ret); | |
24a0111e BF |
3365 | } |
3366 | ||
8b289b2c BF |
3367 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3368 | { | |
3369 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3370 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3371 | } | |
3372 | ||
b37ad28b | 3373 | static __be32 |
41d22663 | 3374 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3375 | struct nfs4_delegation **dp) |
3376 | { | |
3377 | int flags; | |
b37ad28b | 3378 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 3379 | struct nfs4_delegation *deleg; |
567d9829 | 3380 | |
dcd94cc2 TM |
3381 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
3382 | if (deleg == NULL) | |
c44c5eeb | 3383 | goto out; |
24a0111e | 3384 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
3385 | status = nfs4_check_delegmode(deleg, flags); |
3386 | if (status) { | |
3387 | nfs4_put_stid(&deleg->dl_stid); | |
3388 | goto out; | |
3389 | } | |
3390 | *dp = deleg; | |
c44c5eeb | 3391 | out: |
8b289b2c | 3392 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3393 | return nfs_ok; |
3394 | if (status) | |
3395 | return status; | |
dad1c067 | 3396 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3397 | return nfs_ok; |
567d9829 N |
3398 | } |
3399 | ||
a46cb7f2 JL |
3400 | static struct nfs4_ol_stateid * |
3401 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
1da177e4 | 3402 | { |
a46cb7f2 | 3403 | struct nfs4_ol_stateid *local, *ret = NULL; |
fe0750e5 | 3404 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3405 | |
1d31a253 | 3406 | spin_lock(&fp->fi_lock); |
8beefa24 | 3407 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3408 | /* ignore lock owners */ |
3409 | if (local->st_stateowner->so_is_open_owner == 0) | |
3410 | continue; | |
baeb4ff0 | 3411 | if (local->st_stateowner == &oo->oo_owner) { |
a46cb7f2 | 3412 | ret = local; |
d6f2bc5d | 3413 | atomic_inc(&ret->st_stid.sc_count); |
baeb4ff0 | 3414 | break; |
1d31a253 | 3415 | } |
1da177e4 | 3416 | } |
1d31a253 | 3417 | spin_unlock(&fp->fi_lock); |
a46cb7f2 | 3418 | return ret; |
1da177e4 LT |
3419 | } |
3420 | ||
21fb4016 BF |
3421 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3422 | { | |
3423 | int flags = 0; | |
3424 | ||
3425 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3426 | flags |= NFSD_MAY_READ; | |
3427 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3428 | flags |= NFSD_MAY_WRITE; | |
3429 | return flags; | |
3430 | } | |
3431 | ||
7e6a72e5 CH |
3432 | static inline __be32 |
3433 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3434 | struct nfsd4_open *open) | |
3435 | { | |
3436 | struct iattr iattr = { | |
3437 | .ia_valid = ATTR_SIZE, | |
3438 | .ia_size = 0, | |
3439 | }; | |
3440 | if (!open->op_truncate) | |
3441 | return 0; | |
3442 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3443 | return nfserr_inval; | |
3444 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3445 | } | |
3446 | ||
0c12eaff | 3447 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
3448 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3449 | struct nfsd4_open *open) | |
f9d7562f | 3450 | { |
de18643d | 3451 | struct file *filp = NULL; |
f9d7562f | 3452 | __be32 status; |
0c12eaff CB |
3453 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3454 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 3455 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 3456 | |
de18643d | 3457 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
3458 | |
3459 | /* | |
3460 | * Are we trying to set a deny mode that would conflict with | |
3461 | * current access? | |
3462 | */ | |
3463 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3464 | if (status != nfs_ok) { | |
3465 | spin_unlock(&fp->fi_lock); | |
3466 | goto out; | |
3467 | } | |
3468 | ||
3469 | /* set access to the file */ | |
3470 | status = nfs4_file_get_access(fp, open->op_share_access); | |
3471 | if (status != nfs_ok) { | |
3472 | spin_unlock(&fp->fi_lock); | |
3473 | goto out; | |
3474 | } | |
3475 | ||
3476 | /* Set access bits in stateid */ | |
3477 | old_access_bmap = stp->st_access_bmap; | |
3478 | set_access(open->op_share_access, stp); | |
3479 | ||
3480 | /* Set new deny mask */ | |
3481 | old_deny_bmap = stp->st_deny_bmap; | |
3482 | set_deny(open->op_share_deny, stp); | |
3483 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3484 | ||
f9d7562f | 3485 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3486 | spin_unlock(&fp->fi_lock); |
3487 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3488 | if (status) |
baeb4ff0 | 3489 | goto out_put_access; |
de18643d TM |
3490 | spin_lock(&fp->fi_lock); |
3491 | if (!fp->fi_fds[oflag]) { | |
3492 | fp->fi_fds[oflag] = filp; | |
3493 | filp = NULL; | |
3494 | } | |
f9d7562f | 3495 | } |
de18643d TM |
3496 | spin_unlock(&fp->fi_lock); |
3497 | if (filp) | |
3498 | fput(filp); | |
f9d7562f | 3499 | |
7e6a72e5 CH |
3500 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3501 | if (status) | |
3502 | goto out_put_access; | |
7e6a72e5 CH |
3503 | out: |
3504 | return status; | |
baeb4ff0 JL |
3505 | out_put_access: |
3506 | stp->st_access_bmap = old_access_bmap; | |
3507 | nfs4_file_put_access(fp, open->op_share_access); | |
3508 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
3509 | goto out; | |
1da177e4 LT |
3510 | } |
3511 | ||
b37ad28b | 3512 | static __be32 |
dcef0413 | 3513 | 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 | 3514 | { |
b37ad28b | 3515 | __be32 status; |
baeb4ff0 | 3516 | unsigned char old_deny_bmap; |
1da177e4 | 3517 | |
6eb3a1d0 | 3518 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 3519 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 3520 | |
baeb4ff0 JL |
3521 | /* test and set deny mode */ |
3522 | spin_lock(&fp->fi_lock); | |
3523 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
3524 | if (status == nfs_ok) { | |
3525 | old_deny_bmap = stp->st_deny_bmap; | |
3526 | set_deny(open->op_share_deny, stp); | |
3527 | fp->fi_share_deny |= | |
3528 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
3529 | } | |
3530 | spin_unlock(&fp->fi_lock); | |
3531 | ||
3532 | if (status != nfs_ok) | |
1da177e4 | 3533 | return status; |
1da177e4 | 3534 | |
baeb4ff0 JL |
3535 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3536 | if (status != nfs_ok) | |
3537 | reset_union_bmap_deny(old_deny_bmap, stp); | |
3538 | return status; | |
3539 | } | |
1da177e4 | 3540 | |
1da177e4 | 3541 | static void |
1255a8f3 | 3542 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3543 | { |
dad1c067 | 3544 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3545 | } |
3546 | ||
14a24e99 BF |
3547 | /* Should we give out recallable state?: */ |
3548 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3549 | { | |
3550 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3551 | return true; | |
3552 | /* | |
3553 | * In the sessions case, since we don't have to establish a | |
3554 | * separate connection for callbacks, we assume it's OK | |
3555 | * until we hear otherwise: | |
3556 | */ | |
3557 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3558 | } | |
3559 | ||
d564fbec | 3560 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
22d38c4c BF |
3561 | { |
3562 | struct file_lock *fl; | |
3563 | ||
3564 | fl = locks_alloc_lock(); | |
3565 | if (!fl) | |
3566 | return NULL; | |
3567 | locks_init_lock(fl); | |
3568 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3569 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3570 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3571 | fl->fl_end = OFFSET_MAX; | |
d564fbec | 3572 | fl->fl_owner = (fl_owner_t)fp; |
22d38c4c | 3573 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3574 | return fl; |
3575 | } | |
3576 | ||
99c41515 | 3577 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3578 | { |
11b9164a | 3579 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
edab9782 | 3580 | struct file_lock *fl; |
417c6629 JL |
3581 | struct file *filp; |
3582 | int status = 0; | |
edab9782 | 3583 | |
d564fbec | 3584 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3585 | if (!fl) |
3586 | return -ENOMEM; | |
417c6629 JL |
3587 | filp = find_readable_file(fp); |
3588 | if (!filp) { | |
3589 | /* We should always have a readable file here */ | |
3590 | WARN_ON_ONCE(1); | |
3591 | return -EBADF; | |
3592 | } | |
3593 | fl->fl_file = filp; | |
3594 | status = vfs_setlease(filp, fl->fl_type, &fl); | |
3595 | if (status) { | |
3596 | locks_free_lock(fl); | |
3597 | goto out_fput; | |
3598 | } | |
3599 | spin_lock(&state_lock); | |
3600 | spin_lock(&fp->fi_lock); | |
3601 | /* Did the lease get broken before we took the lock? */ | |
3602 | status = -EAGAIN; | |
3603 | if (fp->fi_had_conflict) | |
3604 | goto out_unlock; | |
3605 | /* Race breaker */ | |
3606 | if (fp->fi_lease) { | |
3607 | status = 0; | |
3608 | atomic_inc(&fp->fi_delegees); | |
3609 | hash_delegation_locked(dp, fp); | |
3610 | goto out_unlock; | |
3611 | } | |
acfdf5c3 | 3612 | fp->fi_lease = fl; |
417c6629 | 3613 | fp->fi_deleg_file = filp; |
acfdf5c3 | 3614 | atomic_set(&fp->fi_delegees, 1); |
931ee56c | 3615 | hash_delegation_locked(dp, fp); |
417c6629 | 3616 | spin_unlock(&fp->fi_lock); |
cdc97505 | 3617 | spin_unlock(&state_lock); |
acfdf5c3 | 3618 | return 0; |
417c6629 JL |
3619 | out_unlock: |
3620 | spin_unlock(&fp->fi_lock); | |
3621 | spin_unlock(&state_lock); | |
3622 | out_fput: | |
3623 | fput(filp); | |
e873088f | 3624 | return status; |
acfdf5c3 BF |
3625 | } |
3626 | ||
0b26693c JL |
3627 | static struct nfs4_delegation * |
3628 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
3629 | struct nfs4_file *fp) | |
acfdf5c3 | 3630 | { |
0b26693c JL |
3631 | int status; |
3632 | struct nfs4_delegation *dp; | |
417c6629 | 3633 | |
bf7bd3e9 | 3634 | if (fp->fi_had_conflict) |
0b26693c JL |
3635 | return ERR_PTR(-EAGAIN); |
3636 | ||
3637 | dp = alloc_init_deleg(clp, fh); | |
3638 | if (!dp) | |
3639 | return ERR_PTR(-ENOMEM); | |
3640 | ||
bf7bd3e9 | 3641 | get_nfs4_file(fp); |
417c6629 JL |
3642 | spin_lock(&state_lock); |
3643 | spin_lock(&fp->fi_lock); | |
11b9164a | 3644 | dp->dl_stid.sc_file = fp; |
417c6629 JL |
3645 | if (!fp->fi_lease) { |
3646 | spin_unlock(&fp->fi_lock); | |
3647 | spin_unlock(&state_lock); | |
0b26693c JL |
3648 | status = nfs4_setlease(dp); |
3649 | goto out; | |
417c6629 | 3650 | } |
cbf7a75b | 3651 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3652 | if (fp->fi_had_conflict) { |
417c6629 JL |
3653 | status = -EAGAIN; |
3654 | goto out_unlock; | |
acfdf5c3 | 3655 | } |
931ee56c | 3656 | hash_delegation_locked(dp, fp); |
0b26693c | 3657 | status = 0; |
417c6629 JL |
3658 | out_unlock: |
3659 | spin_unlock(&fp->fi_lock); | |
cdc97505 | 3660 | spin_unlock(&state_lock); |
0b26693c JL |
3661 | out: |
3662 | if (status) { | |
6011695d | 3663 | nfs4_put_stid(&dp->dl_stid); |
0b26693c JL |
3664 | return ERR_PTR(status); |
3665 | } | |
3666 | return dp; | |
edab9782 BF |
3667 | } |
3668 | ||
4aa8913c BH |
3669 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3670 | { | |
3671 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3672 | if (status == -EAGAIN) | |
3673 | open->op_why_no_deleg = WND4_CONTENTION; | |
3674 | else { | |
3675 | open->op_why_no_deleg = WND4_RESOURCE; | |
3676 | switch (open->op_deleg_want) { | |
3677 | case NFS4_SHARE_WANT_READ_DELEG: | |
3678 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3679 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3680 | break; | |
3681 | case NFS4_SHARE_WANT_CANCEL: | |
3682 | open->op_why_no_deleg = WND4_CANCELLED; | |
3683 | break; | |
3684 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3685 | WARN_ON_ONCE(1); |
4aa8913c BH |
3686 | } |
3687 | } | |
3688 | } | |
3689 | ||
1da177e4 LT |
3690 | /* |
3691 | * Attempt to hand out a delegation. | |
99c41515 BF |
3692 | * |
3693 | * Note we don't support write delegations, and won't until the vfs has | |
3694 | * proper support for them. | |
1da177e4 LT |
3695 | */ |
3696 | static void | |
4cf59221 JL |
3697 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
3698 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3699 | { |
3700 | struct nfs4_delegation *dp; | |
4cf59221 JL |
3701 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
3702 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 3703 | int cb_up; |
99c41515 | 3704 | int status = 0; |
1da177e4 | 3705 | |
fe0750e5 | 3706 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3707 | open->op_recall = 0; |
3708 | switch (open->op_claim_type) { | |
3709 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3710 | if (!cb_up) |
7b190fec | 3711 | open->op_recall = 1; |
99c41515 BF |
3712 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3713 | goto out_no_deleg; | |
7b190fec N |
3714 | break; |
3715 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3716 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3717 | /* |
3718 | * Let's not give out any delegations till everyone's | |
3719 | * had the chance to reclaim theirs.... | |
3720 | */ | |
4cf59221 | 3721 | if (locks_in_grace(clp->net)) |
99c41515 | 3722 | goto out_no_deleg; |
dad1c067 | 3723 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3724 | goto out_no_deleg; |
9a0590ae SD |
3725 | /* |
3726 | * Also, if the file was opened for write or | |
3727 | * create, there's a good chance the client's | |
3728 | * about to write to it, resulting in an | |
3729 | * immediate recall (since we don't support | |
3730 | * write delegations): | |
3731 | */ | |
7b190fec | 3732 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3733 | goto out_no_deleg; |
3734 | if (open->op_create == NFS4_OPEN_CREATE) | |
3735 | goto out_no_deleg; | |
7b190fec N |
3736 | break; |
3737 | default: | |
99c41515 | 3738 | goto out_no_deleg; |
7b190fec | 3739 | } |
11b9164a | 3740 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); |
0b26693c | 3741 | if (IS_ERR(dp)) |
dd239cc0 | 3742 | goto out_no_deleg; |
1da177e4 | 3743 | |
d5477a8d | 3744 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3745 | |
8c10cbdb | 3746 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3747 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3748 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 3749 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 3750 | return; |
dd239cc0 | 3751 | out_no_deleg: |
99c41515 BF |
3752 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3753 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3754 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3755 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3756 | open->op_recall = 1; |
3757 | } | |
99c41515 BF |
3758 | |
3759 | /* 4.1 client asking for a delegation? */ | |
3760 | if (open->op_deleg_want) | |
3761 | nfsd4_open_deleg_none_ext(open, status); | |
3762 | return; | |
1da177e4 LT |
3763 | } |
3764 | ||
e27f49c3 BH |
3765 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3766 | struct nfs4_delegation *dp) | |
3767 | { | |
3768 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3769 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3770 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3771 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3772 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3773 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3774 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3775 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3776 | } | |
3777 | /* Otherwise the client must be confused wanting a delegation | |
3778 | * it already has, therefore we don't return | |
3779 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3780 | */ | |
3781 | } | |
3782 | ||
1da177e4 LT |
3783 | /* |
3784 | * called with nfs4_lock_state() held. | |
3785 | */ | |
b37ad28b | 3786 | __be32 |
1da177e4 LT |
3787 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3788 | { | |
6668958f | 3789 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3790 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 3791 | struct nfs4_file *fp = NULL; |
dcef0413 | 3792 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3793 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3794 | __be32 status; |
1da177e4 | 3795 | |
1da177e4 LT |
3796 | /* |
3797 | * Lookup file; if found, lookup stateid and check open request, | |
3798 | * and check for delegations in the process of being recalled. | |
3799 | * If not found, create the nfs4_file struct | |
3800 | */ | |
f9c00c3a | 3801 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 3802 | if (fp != open->op_file) { |
41d22663 | 3803 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3804 | if (status) |
3805 | goto out; | |
a46cb7f2 | 3806 | stp = nfsd4_find_existing_open(fp, open); |
1da177e4 | 3807 | } else { |
950e0118 | 3808 | open->op_file = NULL; |
c44c5eeb | 3809 | status = nfserr_bad_stateid; |
8b289b2c | 3810 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3811 | goto out; |
3e772463 | 3812 | status = nfserr_jukebox; |
1da177e4 LT |
3813 | } |
3814 | ||
3815 | /* | |
3816 | * OPEN the file, or upgrade an existing OPEN. | |
3817 | * If truncate fails, the OPEN fails. | |
3818 | */ | |
3819 | if (stp) { | |
3820 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3821 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3822 | if (status) |
3823 | goto out; | |
3824 | } else { | |
4cdc951b BF |
3825 | stp = open->op_stp; |
3826 | open->op_stp = NULL; | |
996e0938 | 3827 | init_open_stateid(stp, fp, open); |
6eb3a1d0 JL |
3828 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
3829 | if (status) { | |
3830 | release_open_stateid(stp); | |
3831 | goto out; | |
3832 | } | |
1da177e4 | 3833 | } |
dcef0413 BF |
3834 | update_stateid(&stp->st_stid.sc_stateid); |
3835 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3836 | |
d24433cd | 3837 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3838 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3839 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3840 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3841 | goto nodeleg; | |
3842 | } | |
3843 | } | |
3844 | ||
1da177e4 LT |
3845 | /* |
3846 | * Attempt to hand out a delegation. No error return, because the | |
3847 | * OPEN succeeds even if we fail. | |
3848 | */ | |
4cf59221 | 3849 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 3850 | nodeleg: |
1da177e4 LT |
3851 | status = nfs_ok; |
3852 | ||
8c10cbdb | 3853 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3854 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3855 | out: |
d24433cd BH |
3856 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3857 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3858 | open->op_deleg_want) |
3859 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3860 | |
13cd2184 N |
3861 | if (fp) |
3862 | put_nfs4_file(fp); | |
37515177 | 3863 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3864 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3865 | /* |
3866 | * To finish the open response, we just need to set the rflags. | |
3867 | */ | |
3868 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3869 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3870 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 | 3871 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
dcd94cc2 TM |
3872 | if (dp) |
3873 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
3874 | if (stp) |
3875 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
3876 | |
3877 | return status; | |
3878 | } | |
3879 | ||
58fb12e6 JL |
3880 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
3881 | struct nfsd4_open *open, __be32 status) | |
d29b20cd BF |
3882 | { |
3883 | if (open->op_openowner) { | |
3884 | struct nfs4_openowner *oo = open->op_openowner; | |
3885 | ||
3886 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3887 | list_del_init(&oo->oo_close_lru); | |
3888 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3889 | if (status) { | |
3890 | release_openowner(oo); | |
3891 | open->op_openowner = NULL; | |
3892 | } else | |
3893 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3894 | } | |
58fb12e6 JL |
3895 | if (open->op_openowner) |
3896 | nfsd4_cstate_assign_replay(cstate, &oo->oo_owner); | |
d29b20cd | 3897 | } |
32513b40 BF |
3898 | if (open->op_file) |
3899 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3900 | if (open->op_stp) |
6011695d | 3901 | nfs4_put_stid(&open->op_stp->st_stid); |
d29b20cd BF |
3902 | } |
3903 | ||
b37ad28b | 3904 | __be32 |
b591480b BF |
3905 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3906 | clientid_t *clid) | |
1da177e4 LT |
3907 | { |
3908 | struct nfs4_client *clp; | |
b37ad28b | 3909 | __be32 status; |
7f2210fa | 3910 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3911 | |
3912 | nfs4_lock_state(); | |
3913 | dprintk("process_renew(%08x/%08x): starting\n", | |
3914 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3915 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3916 | if (status) |
1da177e4 | 3917 | goto out; |
4b24ca7d | 3918 | clp = cstate->clp; |
1da177e4 | 3919 | status = nfserr_cb_path_down; |
ea1da636 | 3920 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3921 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3922 | goto out; |
3923 | status = nfs_ok; | |
3924 | out: | |
3925 | nfs4_unlock_state(); | |
3926 | return status; | |
3927 | } | |
3928 | ||
a76b4319 | 3929 | static void |
12760c66 | 3930 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3931 | { |
33dcc481 | 3932 | /* do nothing if grace period already ended */ |
a51c84ed | 3933 | if (nn->grace_ended) |
33dcc481 JL |
3934 | return; |
3935 | ||
a76b4319 | 3936 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3937 | nn->grace_ended = true; |
12760c66 | 3938 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3939 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3940 | /* |
3941 | * Now that every NFSv4 client has had the chance to recover and | |
3942 | * to see the (possibly new, possibly shorter) lease time, we | |
3943 | * can safely set the next grace time to the current lease time: | |
3944 | */ | |
5284b44e | 3945 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3946 | } |
3947 | ||
fd39ca9a | 3948 | static time_t |
09121281 | 3949 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3950 | { |
3951 | struct nfs4_client *clp; | |
fe0750e5 | 3952 | struct nfs4_openowner *oo; |
1da177e4 LT |
3953 | struct nfs4_delegation *dp; |
3954 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3955 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3956 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3957 | |
3958 | nfs4_lock_state(); | |
3959 | ||
3960 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3961 | nfsd4_end_grace(nn); |
36acb66b | 3962 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3963 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3964 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3965 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3966 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3967 | t = clp->cl_time - cutoff; | |
a832e7ae | 3968 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3969 | break; |
3970 | } | |
221a6876 | 3971 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3972 | dprintk("NFSD: client in use (clientid %08x)\n", |
3973 | clp->cl_clientid.cl_id); | |
3974 | continue; | |
3975 | } | |
221a6876 | 3976 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3977 | } |
c9a49628 | 3978 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3979 | list_for_each_safe(pos, next, &reaplist) { |
3980 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3981 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3982 | clp->cl_clientid.cl_id); | |
3983 | expire_client(clp); | |
3984 | } | |
cdc97505 | 3985 | spin_lock(&state_lock); |
e8c69d17 | 3986 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3987 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3988 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3989 | continue; | |
1da177e4 | 3990 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3991 | t = dp->dl_time - cutoff; |
3992 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3993 | break; |
3994 | } | |
42690676 JL |
3995 | unhash_delegation_locked(dp); |
3996 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 3997 | } |
cdc97505 | 3998 | spin_unlock(&state_lock); |
2d4a532d JL |
3999 | while (!list_empty(&reaplist)) { |
4000 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
4001 | dl_recall_lru); | |
4002 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 4003 | revoke_delegation(dp); |
1da177e4 | 4004 | } |
73758fed | 4005 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
4006 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
4007 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
4008 | t = oo->oo_time - cutoff; |
4009 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
4010 | break; |
4011 | } | |
fe0750e5 | 4012 | release_openowner(oo); |
1da177e4 | 4013 | } |
a832e7ae | 4014 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 4015 | nfs4_unlock_state(); |
a832e7ae | 4016 | return new_timeo; |
1da177e4 LT |
4017 | } |
4018 | ||
a254b246 HH |
4019 | static struct workqueue_struct *laundry_wq; |
4020 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
4021 | |
4022 | static void | |
09121281 | 4023 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
4024 | { |
4025 | time_t t; | |
09121281 SK |
4026 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
4027 | work); | |
4028 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
4029 | laundromat_work); | |
1da177e4 | 4030 | |
09121281 | 4031 | t = nfs4_laundromat(nn); |
1da177e4 | 4032 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 4033 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
4034 | } |
4035 | ||
f7a4d872 | 4036 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 4037 | { |
11b9164a | 4038 | if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) |
f7a4d872 BF |
4039 | return nfserr_bad_stateid; |
4040 | return nfs_ok; | |
1da177e4 LT |
4041 | } |
4042 | ||
1da177e4 | 4043 | static inline int |
82c5ff1b | 4044 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 4045 | { |
82c5ff1b JL |
4046 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
4047 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
4048 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
4049 | } |
4050 | ||
4051 | static inline int | |
82c5ff1b | 4052 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 4053 | { |
82c5ff1b JL |
4054 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
4055 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
4056 | } |
4057 | ||
4058 | static | |
dcef0413 | 4059 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 4060 | { |
b37ad28b | 4061 | __be32 status = nfserr_openmode; |
1da177e4 | 4062 | |
02921914 BF |
4063 | /* For lock stateid's, we test the parent open, not the lock: */ |
4064 | if (stp->st_openstp) | |
4065 | stp = stp->st_openstp; | |
82c5ff1b | 4066 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 4067 | goto out; |
82c5ff1b | 4068 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
4069 | goto out; |
4070 | status = nfs_ok; | |
4071 | out: | |
4072 | return status; | |
4073 | } | |
4074 | ||
b37ad28b | 4075 | static inline __be32 |
5ccb0066 | 4076 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 4077 | { |
203a8c8e | 4078 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 4079 | return nfs_ok; |
5ccb0066 | 4080 | else if (locks_in_grace(net)) { |
25985edc | 4081 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
4082 | * conflicting state; so we must wait out the grace period. */ |
4083 | return nfserr_grace; | |
4084 | } else if (flags & WR_STATE) | |
4085 | return nfs4_share_conflict(current_fh, | |
4086 | NFS4_SHARE_DENY_WRITE); | |
4087 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
4088 | return nfs4_share_conflict(current_fh, | |
4089 | NFS4_SHARE_DENY_READ); | |
4090 | } | |
4091 | ||
4092 | /* | |
4093 | * Allow READ/WRITE during grace period on recovered state only for files | |
4094 | * that are not able to provide mandatory locking. | |
4095 | */ | |
4096 | static inline int | |
5ccb0066 | 4097 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 4098 | { |
5ccb0066 | 4099 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
4100 | } |
4101 | ||
81b82965 BF |
4102 | /* Returns true iff a is later than b: */ |
4103 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
4104 | { | |
1a9357f4 | 4105 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
4106 | } |
4107 | ||
57b7b43b | 4108 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 4109 | { |
6668958f AA |
4110 | /* |
4111 | * When sessions are used the stateid generation number is ignored | |
4112 | * when it is zero. | |
4113 | */ | |
28dde241 | 4114 | if (has_session && in->si_generation == 0) |
81b82965 BF |
4115 | return nfs_ok; |
4116 | ||
4117 | if (in->si_generation == ref->si_generation) | |
4118 | return nfs_ok; | |
6668958f | 4119 | |
0836f587 | 4120 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 4121 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
4122 | return nfserr_bad_stateid; |
4123 | /* | |
81b82965 BF |
4124 | * However, we could see a stateid from the past, even from a |
4125 | * non-buggy client. For example, if the client sends a lock | |
4126 | * while some IO is outstanding, the lock may bump si_generation | |
4127 | * while the IO is still in flight. The client could avoid that | |
4128 | * situation by waiting for responses on all the IO requests, | |
4129 | * but better performance may result in retrying IO that | |
4130 | * receives an old_stateid error if requests are rarely | |
4131 | * reordered in flight: | |
0836f587 | 4132 | */ |
81b82965 | 4133 | return nfserr_old_stateid; |
0836f587 BF |
4134 | } |
4135 | ||
7df302f7 | 4136 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 4137 | { |
97b7e3b6 BF |
4138 | struct nfs4_stid *s; |
4139 | struct nfs4_ol_stateid *ols; | |
1af71cc8 | 4140 | __be32 status = nfserr_bad_stateid; |
17456804 | 4141 | |
7df302f7 | 4142 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
1af71cc8 | 4143 | return status; |
7df302f7 CL |
4144 | /* Client debugging aid. */ |
4145 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
4146 | char addr_str[INET6_ADDRSTRLEN]; | |
4147 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
4148 | sizeof(addr_str)); | |
4149 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
4150 | "with incorrect client ID\n", addr_str); | |
1af71cc8 | 4151 | return status; |
7df302f7 | 4152 | } |
1af71cc8 JL |
4153 | spin_lock(&cl->cl_lock); |
4154 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 4155 | if (!s) |
1af71cc8 | 4156 | goto out_unlock; |
36279ac1 | 4157 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 4158 | if (status) |
1af71cc8 | 4159 | goto out_unlock; |
23340032 BF |
4160 | switch (s->sc_type) { |
4161 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
4162 | status = nfs_ok; |
4163 | break; | |
3bd64a5b | 4164 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
4165 | status = nfserr_deleg_revoked; |
4166 | break; | |
23340032 BF |
4167 | case NFS4_OPEN_STID: |
4168 | case NFS4_LOCK_STID: | |
4169 | ols = openlockstateid(s); | |
4170 | if (ols->st_stateowner->so_is_open_owner | |
4171 | && !(openowner(ols->st_stateowner)->oo_flags | |
4172 | & NFS4_OO_CONFIRMED)) | |
1af71cc8 JL |
4173 | status = nfserr_bad_stateid; |
4174 | else | |
4175 | status = nfs_ok; | |
4176 | break; | |
23340032 BF |
4177 | default: |
4178 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 4179 | /* Fallthrough */ |
23340032 | 4180 | case NFS4_CLOSED_STID: |
b0fc29d6 | 4181 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 4182 | status = nfserr_bad_stateid; |
23340032 | 4183 | } |
1af71cc8 JL |
4184 | out_unlock: |
4185 | spin_unlock(&cl->cl_lock); | |
4186 | return status; | |
17456804 BS |
4187 | } |
4188 | ||
2dd6e458 TM |
4189 | static __be32 |
4190 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
4191 | stateid_t *stateid, unsigned char typemask, | |
4192 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 4193 | { |
0eb6f20a | 4194 | __be32 status; |
38c2f4b1 BF |
4195 | |
4196 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
4197 | return nfserr_bad_stateid; | |
4b24ca7d | 4198 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 4199 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 4200 | if (cstate->session) |
a8a7c677 | 4201 | return nfserr_bad_stateid; |
38c2f4b1 | 4202 | return nfserr_stale_stateid; |
a8a7c677 | 4203 | } |
0eb6f20a BF |
4204 | if (status) |
4205 | return status; | |
4b24ca7d | 4206 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
4207 | if (!*s) |
4208 | return nfserr_bad_stateid; | |
4209 | return nfs_ok; | |
38c2f4b1 BF |
4210 | } |
4211 | ||
1da177e4 LT |
4212 | /* |
4213 | * Checks for stateid operations | |
4214 | */ | |
b37ad28b | 4215 | __be32 |
5ccb0066 | 4216 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 4217 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 4218 | { |
69064a27 | 4219 | struct nfs4_stid *s; |
dcef0413 | 4220 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4221 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 4222 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 4223 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 4224 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 4225 | struct file *file = NULL; |
b37ad28b | 4226 | __be32 status; |
1da177e4 | 4227 | |
1da177e4 LT |
4228 | if (filpp) |
4229 | *filpp = NULL; | |
4230 | ||
5ccb0066 | 4231 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
4232 | return nfserr_grace; |
4233 | ||
4234 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 4235 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 4236 | |
14bcab1a TM |
4237 | nfs4_lock_state(); |
4238 | ||
2dd6e458 | 4239 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 4240 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 4241 | &s, nn); |
38c2f4b1 | 4242 | if (status) |
fd911011 | 4243 | goto unlock_state; |
69064a27 BF |
4244 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4245 | if (status) | |
4246 | goto out; | |
f7a4d872 BF |
4247 | switch (s->sc_type) { |
4248 | case NFS4_DELEG_STID: | |
69064a27 | 4249 | dp = delegstateid(s); |
dc9bf700 BF |
4250 | status = nfs4_check_delegmode(dp, flags); |
4251 | if (status) | |
4252 | goto out; | |
43b0178e | 4253 | if (filpp) { |
11b9164a | 4254 | file = dp->dl_stid.sc_file->fi_deleg_file; |
14bcab1a | 4255 | if (!file) { |
063b0fb9 BF |
4256 | WARN_ON_ONCE(1); |
4257 | status = nfserr_serverfault; | |
4258 | goto out; | |
4259 | } | |
de18643d | 4260 | get_file(file); |
43b0178e | 4261 | } |
f7a4d872 BF |
4262 | break; |
4263 | case NFS4_OPEN_STID: | |
4264 | case NFS4_LOCK_STID: | |
69064a27 | 4265 | stp = openlockstateid(s); |
f7a4d872 BF |
4266 | status = nfs4_check_fh(current_fh, stp); |
4267 | if (status) | |
1da177e4 | 4268 | goto out; |
fe0750e5 | 4269 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4270 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4271 | goto out; |
a4455be0 BF |
4272 | status = nfs4_check_openmode(stp, flags); |
4273 | if (status) | |
1da177e4 | 4274 | goto out; |
f9d7562f | 4275 | if (filpp) { |
11b9164a TM |
4276 | struct nfs4_file *fp = stp->st_stid.sc_file; |
4277 | ||
f9d7562f | 4278 | if (flags & RD_STATE) |
11b9164a | 4279 | file = find_readable_file(fp); |
f9d7562f | 4280 | else |
11b9164a | 4281 | file = find_writeable_file(fp); |
f9d7562f | 4282 | } |
f7a4d872 BF |
4283 | break; |
4284 | default: | |
14bcab1a TM |
4285 | status = nfserr_bad_stateid; |
4286 | goto out; | |
1da177e4 LT |
4287 | } |
4288 | status = nfs_ok; | |
14bcab1a | 4289 | if (file) |
de18643d | 4290 | *filpp = file; |
1da177e4 | 4291 | out: |
fd911011 TM |
4292 | nfs4_put_stid(s); |
4293 | unlock_state: | |
14bcab1a | 4294 | nfs4_unlock_state(); |
1da177e4 LT |
4295 | return status; |
4296 | } | |
4297 | ||
e1ca12df | 4298 | static __be32 |
dcef0413 | 4299 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4300 | { |
a1b8ff4c BF |
4301 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4302 | ||
11b9164a | 4303 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
e1ca12df | 4304 | return nfserr_locks_held; |
c53530da | 4305 | release_lockowner_if_empty(lo); |
e1ca12df BS |
4306 | return nfs_ok; |
4307 | } | |
4308 | ||
17456804 BS |
4309 | /* |
4310 | * Test if the stateid is valid | |
4311 | */ | |
4312 | __be32 | |
4313 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4314 | struct nfsd4_test_stateid *test_stateid) | |
4315 | { | |
03cfb420 BS |
4316 | struct nfsd4_test_stateid_id *stateid; |
4317 | struct nfs4_client *cl = cstate->session->se_client; | |
4318 | ||
4319 | nfs4_lock_state(); | |
4320 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4321 | stateid->ts_id_status = |
4322 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4323 | nfs4_unlock_state(); |
4324 | ||
17456804 BS |
4325 | return nfs_ok; |
4326 | } | |
4327 | ||
e1ca12df BS |
4328 | __be32 |
4329 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4330 | struct nfsd4_free_stateid *free_stateid) | |
4331 | { | |
4332 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4333 | struct nfs4_stid *s; |
3bd64a5b | 4334 | struct nfs4_delegation *dp; |
38c2f4b1 | 4335 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4336 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4337 | |
4338 | nfs4_lock_state(); | |
1af71cc8 JL |
4339 | spin_lock(&cl->cl_lock); |
4340 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 4341 | if (!s) |
1af71cc8 | 4342 | goto out_unlock; |
2da1cec7 BF |
4343 | switch (s->sc_type) { |
4344 | case NFS4_DELEG_STID: | |
e1ca12df | 4345 | ret = nfserr_locks_held; |
1af71cc8 | 4346 | break; |
2da1cec7 | 4347 | case NFS4_OPEN_STID: |
2da1cec7 BF |
4348 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
4349 | if (ret) | |
1af71cc8 JL |
4350 | break; |
4351 | ret = nfserr_locks_held; | |
f7a4d872 | 4352 | break; |
1af71cc8 JL |
4353 | case NFS4_LOCK_STID: |
4354 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4355 | if (ret) | |
4356 | break; | |
4357 | spin_unlock(&cl->cl_lock); | |
4358 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4359 | goto out; | |
3bd64a5b BF |
4360 | case NFS4_REVOKED_DELEG_STID: |
4361 | dp = delegstateid(s); | |
2d4a532d JL |
4362 | list_del_init(&dp->dl_recall_lru); |
4363 | spin_unlock(&cl->cl_lock); | |
6011695d | 4364 | nfs4_put_stid(s); |
3bd64a5b | 4365 | ret = nfs_ok; |
1af71cc8 JL |
4366 | goto out; |
4367 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 4368 | } |
1af71cc8 JL |
4369 | out_unlock: |
4370 | spin_unlock(&cl->cl_lock); | |
e1ca12df BS |
4371 | out: |
4372 | nfs4_unlock_state(); | |
4373 | return ret; | |
4374 | } | |
4375 | ||
4c4cd222 N |
4376 | static inline int |
4377 | setlkflg (int type) | |
4378 | { | |
4379 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4380 | RD_STATE : WR_STATE; | |
4381 | } | |
1da177e4 | 4382 | |
dcef0413 | 4383 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4384 | { |
4385 | struct svc_fh *current_fh = &cstate->current_fh; | |
4386 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4387 | __be32 status; | |
4388 | ||
c0a5d93e BF |
4389 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4390 | if (status) | |
4391 | return status; | |
3bd64a5b BF |
4392 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4393 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4394 | /* |
4395 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4396 | * nfserr_replay_me from the previous step, and |
4397 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4398 | */ |
4399 | return nfserr_bad_stateid; | |
4400 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4401 | if (status) | |
4402 | return status; | |
4403 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4404 | } |
4405 | ||
1da177e4 LT |
4406 | /* |
4407 | * Checks for sequence id mutating operations. | |
4408 | */ | |
b37ad28b | 4409 | static __be32 |
dd453dfd | 4410 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4411 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4412 | struct nfs4_ol_stateid **stpp, |
4413 | struct nfsd_net *nn) | |
1da177e4 | 4414 | { |
0836f587 | 4415 | __be32 status; |
38c2f4b1 | 4416 | struct nfs4_stid *s; |
e17f99b7 | 4417 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4418 | |
8c10cbdb BH |
4419 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4420 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4421 | |
1da177e4 | 4422 | *stpp = NULL; |
2dd6e458 | 4423 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4424 | if (status) |
4425 | return status; | |
e17f99b7 | 4426 | stp = openlockstateid(s); |
58fb12e6 | 4427 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 4428 | |
e17f99b7 | 4429 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 4430 | if (!status) |
e17f99b7 | 4431 | *stpp = stp; |
fd911011 TM |
4432 | else |
4433 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 4434 | return status; |
c0a5d93e | 4435 | } |
39325bd0 | 4436 | |
3320fef1 SK |
4437 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4438 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4439 | { |
4440 | __be32 status; | |
4441 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 4442 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4443 | |
c0a5d93e | 4444 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 4445 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
4446 | if (status) |
4447 | return status; | |
4cbfc9f7 TM |
4448 | oo = openowner(stp->st_stateowner); |
4449 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
4450 | nfs4_put_stid(&stp->st_stid); | |
3a4f98bb | 4451 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
4452 | } |
4453 | *stpp = stp; | |
3a4f98bb | 4454 | return nfs_ok; |
1da177e4 LT |
4455 | } |
4456 | ||
b37ad28b | 4457 | __be32 |
ca364317 | 4458 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4459 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4460 | { |
b37ad28b | 4461 | __be32 status; |
fe0750e5 | 4462 | struct nfs4_openowner *oo; |
dcef0413 | 4463 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4464 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4465 | |
a6a9f18f AV |
4466 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4467 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4468 | |
ca364317 | 4469 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4470 | if (status) |
4471 | return status; | |
1da177e4 LT |
4472 | |
4473 | nfs4_lock_state(); | |
4474 | ||
9072d5c6 | 4475 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4476 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4477 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4478 | if (status) |
68b66e82 | 4479 | goto out; |
fe0750e5 | 4480 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4481 | status = nfserr_bad_stateid; |
dad1c067 | 4482 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
2585fc79 | 4483 | goto put_stateid; |
dad1c067 | 4484 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4485 | update_stateid(&stp->st_stid.sc_stateid); |
4486 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4487 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4488 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4489 | |
2a4317c5 | 4490 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4491 | status = nfs_ok; |
2585fc79 TM |
4492 | put_stateid: |
4493 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4494 | out: |
9411b1d4 | 4495 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4496 | nfs4_unlock_state(); |
1da177e4 LT |
4497 | return status; |
4498 | } | |
4499 | ||
6409a5a6 | 4500 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4501 | { |
82c5ff1b | 4502 | if (!test_access(access, stp)) |
6409a5a6 | 4503 | return; |
11b9164a | 4504 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 4505 | clear_access(access, stp); |
6409a5a6 | 4506 | } |
f197c271 | 4507 | |
6409a5a6 BF |
4508 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4509 | { | |
4510 | switch (to_access) { | |
4511 | case NFS4_SHARE_ACCESS_READ: | |
4512 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4513 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4514 | break; | |
4515 | case NFS4_SHARE_ACCESS_WRITE: | |
4516 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4517 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4518 | break; | |
4519 | case NFS4_SHARE_ACCESS_BOTH: | |
4520 | break; | |
4521 | default: | |
063b0fb9 | 4522 | WARN_ON_ONCE(1); |
1da177e4 LT |
4523 | } |
4524 | } | |
4525 | ||
b37ad28b | 4526 | __be32 |
ca364317 BF |
4527 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4528 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4529 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4530 | { |
b37ad28b | 4531 | __be32 status; |
dcef0413 | 4532 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4533 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4534 | |
a6a9f18f AV |
4535 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4536 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4537 | |
c30e92df | 4538 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4539 | if (od->od_deleg_want) |
4540 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4541 | od->od_deleg_want); | |
1da177e4 LT |
4542 | |
4543 | nfs4_lock_state(); | |
c0a5d93e | 4544 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4545 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4546 | if (status) |
1da177e4 | 4547 | goto out; |
1da177e4 | 4548 | status = nfserr_inval; |
82c5ff1b | 4549 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4550 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 4551 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 4552 | goto put_stateid; |
1da177e4 | 4553 | } |
ce0fc43c | 4554 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4555 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 4556 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 4557 | goto put_stateid; |
1da177e4 | 4558 | } |
6409a5a6 | 4559 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4560 | |
ce0fc43c | 4561 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4562 | |
dcef0413 BF |
4563 | update_stateid(&stp->st_stid.sc_stateid); |
4564 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4565 | status = nfs_ok; |
0667b1e9 TM |
4566 | put_stateid: |
4567 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4568 | out: |
9411b1d4 | 4569 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 4570 | nfs4_unlock_state(); |
1da177e4 LT |
4571 | return status; |
4572 | } | |
4573 | ||
f7a4d872 BF |
4574 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4575 | { | |
acf9295b TM |
4576 | struct nfs4_client *clp = s->st_stid.sc_client; |
4577 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4578 | ||
f7a4d872 | 4579 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4580 | unhash_open_stateid(s); |
4581 | ||
4582 | if (clp->cl_minorversion) { | |
acf9295b TM |
4583 | if (list_empty(&oo->oo_owner.so_stateids)) |
4584 | release_openowner(oo); | |
6011695d | 4585 | nfs4_put_stid(&s->st_stid); |
acf9295b | 4586 | } else { |
6011695d TM |
4587 | /* |
4588 | * In the 4.0 case we need to keep the owners around a | |
4589 | * little while to handle CLOSE replay. We still do need | |
4590 | * to release any file access that is held by them | |
4591 | * before returning however. | |
4592 | */ | |
4593 | release_all_access(s); | |
11b9164a TM |
4594 | if (s->st_stid.sc_file) { |
4595 | put_nfs4_file(s->st_stid.sc_file); | |
4596 | s->st_stid.sc_file = NULL; | |
f8338834 | 4597 | } |
acf9295b | 4598 | oo->oo_last_closed_stid = s; |
acf9295b TM |
4599 | if (list_empty(&oo->oo_owner.so_stateids)) |
4600 | move_to_close_lru(oo, clp->net); | |
4601 | } | |
38c387b5 BF |
4602 | } |
4603 | ||
1da177e4 LT |
4604 | /* |
4605 | * nfs4_unlock_state() called after encode | |
4606 | */ | |
b37ad28b | 4607 | __be32 |
ca364317 | 4608 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4609 | struct nfsd4_close *close) |
1da177e4 | 4610 | { |
b37ad28b | 4611 | __be32 status; |
dcef0413 | 4612 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4613 | struct net *net = SVC_NET(rqstp); |
4614 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4615 | |
a6a9f18f AV |
4616 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4617 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4618 | |
4619 | nfs4_lock_state(); | |
f7a4d872 BF |
4620 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4621 | &close->cl_stateid, | |
4622 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4623 | &stp, nn); |
9411b1d4 | 4624 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4625 | if (status) |
1da177e4 | 4626 | goto out; |
dcef0413 BF |
4627 | update_stateid(&stp->st_stid.sc_stateid); |
4628 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4629 | |
f7a4d872 | 4630 | nfsd4_close_open_stateid(stp); |
8a0b589d TM |
4631 | |
4632 | /* put reference from nfs4_preprocess_seqid_op */ | |
4633 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 4634 | out: |
58fb12e6 | 4635 | nfs4_unlock_state(); |
1da177e4 LT |
4636 | return status; |
4637 | } | |
4638 | ||
b37ad28b | 4639 | __be32 |
ca364317 BF |
4640 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4641 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4642 | { |
203a8c8e BF |
4643 | struct nfs4_delegation *dp; |
4644 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4645 | struct nfs4_stid *s; |
b37ad28b | 4646 | __be32 status; |
3320fef1 | 4647 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4648 | |
ca364317 | 4649 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4650 | return status; |
1da177e4 LT |
4651 | |
4652 | nfs4_lock_state(); | |
2dd6e458 | 4653 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4654 | if (status) |
203a8c8e | 4655 | goto out; |
38c2f4b1 | 4656 | dp = delegstateid(s); |
d5477a8d | 4657 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e | 4658 | if (status) |
fd911011 | 4659 | goto put_stateid; |
203a8c8e | 4660 | |
3bd64a5b | 4661 | destroy_delegation(dp); |
fd911011 TM |
4662 | put_stateid: |
4663 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 | 4664 | out: |
203a8c8e BF |
4665 | nfs4_unlock_state(); |
4666 | ||
1da177e4 LT |
4667 | return status; |
4668 | } | |
4669 | ||
4670 | ||
1da177e4 | 4671 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4672 | |
87df4de8 BH |
4673 | static inline u64 |
4674 | end_offset(u64 start, u64 len) | |
4675 | { | |
4676 | u64 end; | |
4677 | ||
4678 | end = start + len; | |
4679 | return end >= start ? end: NFS4_MAX_UINT64; | |
4680 | } | |
4681 | ||
4682 | /* last octet in a range */ | |
4683 | static inline u64 | |
4684 | last_byte_offset(u64 start, u64 len) | |
4685 | { | |
4686 | u64 end; | |
4687 | ||
063b0fb9 | 4688 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4689 | end = start + len; |
4690 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4691 | } | |
4692 | ||
1da177e4 LT |
4693 | /* |
4694 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4695 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4696 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4697 | * locking, this prevents us from being completely protocol-compliant. The | |
4698 | * real solution to this problem is to start using unsigned file offsets in | |
4699 | * the VFS, but this is a very deep change! | |
4700 | */ | |
4701 | static inline void | |
4702 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4703 | { | |
4704 | if (lock->fl_start < 0) | |
4705 | lock->fl_start = OFFSET_MAX; | |
4706 | if (lock->fl_end < 0) | |
4707 | lock->fl_end = OFFSET_MAX; | |
4708 | } | |
4709 | ||
d5b9026a N |
4710 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4711 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4712 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4713 | }; |
1da177e4 LT |
4714 | |
4715 | static inline void | |
4716 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4717 | { | |
fe0750e5 | 4718 | struct nfs4_lockowner *lo; |
1da177e4 | 4719 | |
d5b9026a | 4720 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4721 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4722 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4723 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4724 | if (!deny->ld_owner.data) |
4725 | /* We just don't care that much */ | |
4726 | goto nevermind; | |
fe0750e5 BF |
4727 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4728 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4729 | } else { |
7c13f344 BF |
4730 | nevermind: |
4731 | deny->ld_owner.len = 0; | |
4732 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4733 | deny->ld_clientid.cl_boot = 0; |
4734 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4735 | } |
4736 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4737 | deny->ld_length = NFS4_MAX_UINT64; |
4738 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4739 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4740 | deny->ld_type = NFS4_READ_LT; | |
4741 | if (fl->fl_type != F_RDLCK) | |
4742 | deny->ld_type = NFS4_WRITE_LT; | |
4743 | } | |
4744 | ||
fe0750e5 | 4745 | static struct nfs4_lockowner * |
b3c32bcd TM |
4746 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4747 | struct nfsd_net *nn) | |
1da177e4 | 4748 | { |
b3c32bcd TM |
4749 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4750 | struct nfs4_stateowner *so; | |
1da177e4 | 4751 | |
b3c32bcd TM |
4752 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4753 | if (so->so_is_open_owner) | |
4754 | continue; | |
4755 | if (!same_owner_str(so, owner, clid)) | |
4756 | continue; | |
4757 | return lockowner(so); | |
1da177e4 LT |
4758 | } |
4759 | return NULL; | |
4760 | } | |
4761 | ||
6b180f0b JL |
4762 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
4763 | { | |
4764 | struct nfs4_lockowner *lo = lockowner(sop); | |
4765 | ||
4766 | kmem_cache_free(lockowner_slab, lo); | |
4767 | } | |
4768 | ||
4769 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
4770 | .so_free = nfs4_free_lockowner, | |
4771 | }; | |
4772 | ||
1da177e4 LT |
4773 | /* |
4774 | * Alloc a lock owner structure. | |
4775 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4776 | * occurred. |
1da177e4 | 4777 | * |
16bfdaaf | 4778 | * strhashval = ownerstr_hashval |
1da177e4 | 4779 | */ |
fe0750e5 | 4780 | static struct nfs4_lockowner * |
dcef0413 | 4781 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4782 | struct nfs4_lockowner *lo; |
b3c32bcd | 4783 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4784 | |
fe0750e5 BF |
4785 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4786 | if (!lo) | |
1da177e4 | 4787 | return NULL; |
fe0750e5 BF |
4788 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4789 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4790 | /* It is the openowner seqid that will be incremented in encode in the |
4791 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4792 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
6b180f0b | 4793 | lo->lo_owner.so_ops = &lockowner_ops; |
b3c32bcd | 4794 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4795 | return lo; |
1da177e4 LT |
4796 | } |
4797 | ||
356a95ec JL |
4798 | static void |
4799 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, | |
4800 | struct nfs4_file *fp, struct inode *inode, | |
4801 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4802 | { |
d3b313a4 | 4803 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4804 | |
356a95ec JL |
4805 | lockdep_assert_held(&clp->cl_lock); |
4806 | ||
3d0fabd5 | 4807 | atomic_inc(&stp->st_stid.sc_count); |
3abdb607 | 4808 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 | 4809 | stp->st_stateowner = &lo->lo_owner; |
13cd2184 | 4810 | get_nfs4_file(fp); |
11b9164a | 4811 | stp->st_stid.sc_file = fp; |
b49e084d | 4812 | stp->st_stid.sc_free = nfs4_free_lock_stateid; |
0997b173 | 4813 | stp->st_access_bmap = 0; |
1da177e4 | 4814 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4815 | stp->st_openstp = open_stp; |
3c87b9b7 | 4816 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 4817 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
4818 | spin_lock(&fp->fi_lock); |
4819 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4820 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4821 | } |
4822 | ||
c53530da JL |
4823 | static struct nfs4_ol_stateid * |
4824 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4825 | { | |
4826 | struct nfs4_ol_stateid *lst; | |
356a95ec JL |
4827 | struct nfs4_client *clp = lo->lo_owner.so_client; |
4828 | ||
4829 | lockdep_assert_held(&clp->cl_lock); | |
c53530da JL |
4830 | |
4831 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
3d0fabd5 TM |
4832 | if (lst->st_stid.sc_file == fp) { |
4833 | atomic_inc(&lst->st_stid.sc_count); | |
c53530da | 4834 | return lst; |
3d0fabd5 | 4835 | } |
c53530da JL |
4836 | } |
4837 | return NULL; | |
4838 | } | |
4839 | ||
356a95ec JL |
4840 | static struct nfs4_ol_stateid * |
4841 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
4842 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
4843 | bool *new) | |
4844 | { | |
4845 | struct nfs4_stid *ns = NULL; | |
4846 | struct nfs4_ol_stateid *lst; | |
4847 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4848 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
4849 | ||
4850 | spin_lock(&clp->cl_lock); | |
4851 | lst = find_lock_stateid(lo, fi); | |
4852 | if (lst == NULL) { | |
4853 | spin_unlock(&clp->cl_lock); | |
4854 | ns = nfs4_alloc_stid(clp, stateid_slab); | |
4855 | if (ns == NULL) | |
4856 | return NULL; | |
4857 | ||
4858 | spin_lock(&clp->cl_lock); | |
4859 | lst = find_lock_stateid(lo, fi); | |
4860 | if (likely(!lst)) { | |
4861 | lst = openlockstateid(ns); | |
4862 | init_lock_stateid(lst, lo, fi, inode, ost); | |
4863 | ns = NULL; | |
4864 | *new = true; | |
4865 | } | |
4866 | } | |
4867 | spin_unlock(&clp->cl_lock); | |
4868 | if (ns) | |
4869 | nfs4_put_stid(ns); | |
4870 | return lst; | |
4871 | } | |
c53530da | 4872 | |
fd39ca9a | 4873 | static int |
1da177e4 LT |
4874 | check_lock_length(u64 offset, u64 length) |
4875 | { | |
87df4de8 | 4876 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4877 | LOFF_OVERFLOW(offset, length))); |
4878 | } | |
4879 | ||
dcef0413 | 4880 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 4881 | { |
11b9164a | 4882 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 4883 | |
7214e860 JL |
4884 | lockdep_assert_held(&fp->fi_lock); |
4885 | ||
82c5ff1b | 4886 | if (test_access(access, lock_stp)) |
0997b173 | 4887 | return; |
12659651 | 4888 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4889 | set_access(access, lock_stp); |
0997b173 BF |
4890 | } |
4891 | ||
356a95ec JL |
4892 | static __be32 |
4893 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
4894 | struct nfs4_ol_stateid *ost, | |
4895 | struct nfsd4_lock *lock, | |
4896 | struct nfs4_ol_stateid **lst, bool *new) | |
64a284d0 | 4897 | { |
11b9164a | 4898 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
4899 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
4900 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
f9c00c3a | 4901 | struct inode *inode = cstate->current_fh.fh_dentry->d_inode; |
64a284d0 BF |
4902 | struct nfs4_lockowner *lo; |
4903 | unsigned int strhashval; | |
20e9e2bc | 4904 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4905 | |
b3c32bcd | 4906 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4907 | if (!lo) { |
4908 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4909 | &lock->v.new.owner); | |
4910 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4911 | if (lo == NULL) | |
4912 | return nfserr_jukebox; | |
4913 | } else { | |
4914 | /* with an existing lockowner, seqids must be the same */ | |
4915 | if (!cstate->minorversion && | |
4916 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4917 | return nfserr_bad_seqid; |
64a284d0 | 4918 | } |
c53530da | 4919 | |
356a95ec | 4920 | *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
64a284d0 | 4921 | if (*lst == NULL) { |
356a95ec JL |
4922 | release_lockowner_if_empty(lo); |
4923 | return nfserr_jukebox; | |
64a284d0 | 4924 | } |
64a284d0 BF |
4925 | return nfs_ok; |
4926 | } | |
4927 | ||
1da177e4 LT |
4928 | /* |
4929 | * LOCK operation | |
4930 | */ | |
b37ad28b | 4931 | __be32 |
ca364317 | 4932 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4933 | struct nfsd4_lock *lock) |
1da177e4 | 4934 | { |
fe0750e5 BF |
4935 | struct nfs4_openowner *open_sop = NULL; |
4936 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 4937 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 4938 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 4939 | struct nfs4_file *fp; |
7d947842 | 4940 | struct file *filp = NULL; |
21179d81 JL |
4941 | struct file_lock *file_lock = NULL; |
4942 | struct file_lock *conflock = NULL; | |
b37ad28b | 4943 | __be32 status = 0; |
64a284d0 | 4944 | bool new_state = false; |
b34f27aa | 4945 | int lkflg; |
b8dd7b9a | 4946 | int err; |
3320fef1 SK |
4947 | struct net *net = SVC_NET(rqstp); |
4948 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4949 | |
4950 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4951 | (long long) lock->lk_offset, | |
4952 | (long long) lock->lk_length); | |
4953 | ||
1da177e4 LT |
4954 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4955 | return nfserr_inval; | |
4956 | ||
ca364317 | 4957 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4958 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4959 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4960 | return status; | |
4961 | } | |
4962 | ||
1da177e4 LT |
4963 | nfs4_lock_state(); |
4964 | ||
4965 | if (lock->lk_is_new) { | |
684e5638 BF |
4966 | if (nfsd4_has_session(cstate)) |
4967 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4968 | memcpy(&lock->v.new.clientid, | |
4969 | &cstate->session->se_client->cl_clientid, | |
4970 | sizeof(clientid_t)); | |
4971 | ||
1da177e4 | 4972 | status = nfserr_stale_clientid; |
2c142baa | 4973 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4974 | goto out; |
1da177e4 | 4975 | |
1da177e4 | 4976 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4977 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4978 | lock->lk_new_open_seqid, |
4979 | &lock->lk_new_open_stateid, | |
3320fef1 | 4980 | &open_stp, nn); |
37515177 | 4981 | if (status) |
1da177e4 | 4982 | goto out; |
fe0750e5 | 4983 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4984 | status = nfserr_bad_stateid; |
684e5638 | 4985 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4986 | &lock->v.new.clientid)) |
4987 | goto out; | |
64a284d0 BF |
4988 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4989 | &lock_stp, &new_state); | |
3d0fabd5 | 4990 | } else { |
dd453dfd | 4991 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4992 | lock->lk_old_lock_seqid, |
4993 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4994 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 4995 | } |
e1aaa891 BF |
4996 | if (status) |
4997 | goto out; | |
64a284d0 | 4998 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4999 | |
b34f27aa BF |
5000 | lkflg = setlkflg(lock->lk_type); |
5001 | status = nfs4_check_openmode(lock_stp, lkflg); | |
5002 | if (status) | |
5003 | goto out; | |
5004 | ||
0dd395dc | 5005 | status = nfserr_grace; |
3320fef1 | 5006 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
5007 | goto out; |
5008 | status = nfserr_no_grace; | |
3320fef1 | 5009 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
5010 | goto out; |
5011 | ||
21179d81 JL |
5012 | file_lock = locks_alloc_lock(); |
5013 | if (!file_lock) { | |
5014 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5015 | status = nfserr_jukebox; | |
5016 | goto out; | |
5017 | } | |
5018 | ||
11b9164a | 5019 | fp = lock_stp->st_stid.sc_file; |
21179d81 | 5020 | locks_init_lock(file_lock); |
1da177e4 LT |
5021 | switch (lock->lk_type) { |
5022 | case NFS4_READ_LT: | |
5023 | case NFS4_READW_LT: | |
7214e860 JL |
5024 | spin_lock(&fp->fi_lock); |
5025 | filp = find_readable_file_locked(fp); | |
0997b173 BF |
5026 | if (filp) |
5027 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
7214e860 | 5028 | spin_unlock(&fp->fi_lock); |
21179d81 | 5029 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 5030 | break; |
1da177e4 LT |
5031 | case NFS4_WRITE_LT: |
5032 | case NFS4_WRITEW_LT: | |
7214e860 JL |
5033 | spin_lock(&fp->fi_lock); |
5034 | filp = find_writeable_file_locked(fp); | |
0997b173 BF |
5035 | if (filp) |
5036 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
7214e860 | 5037 | spin_unlock(&fp->fi_lock); |
21179d81 | 5038 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 5039 | break; |
1da177e4 LT |
5040 | default: |
5041 | status = nfserr_inval; | |
5042 | goto out; | |
5043 | } | |
f9d7562f BF |
5044 | if (!filp) { |
5045 | status = nfserr_openmode; | |
5046 | goto out; | |
5047 | } | |
21179d81 JL |
5048 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
5049 | file_lock->fl_pid = current->tgid; | |
5050 | file_lock->fl_file = filp; | |
5051 | file_lock->fl_flags = FL_POSIX; | |
5052 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5053 | file_lock->fl_start = lock->lk_offset; | |
5054 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
5055 | nfs4_transform_lock_offset(file_lock); | |
5056 | ||
5057 | conflock = locks_alloc_lock(); | |
5058 | if (!conflock) { | |
5059 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5060 | status = nfserr_jukebox; | |
5061 | goto out; | |
5062 | } | |
1da177e4 | 5063 | |
21179d81 | 5064 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 5065 | switch (-err) { |
1da177e4 | 5066 | case 0: /* success! */ |
dcef0413 BF |
5067 | update_stateid(&lock_stp->st_stid.sc_stateid); |
5068 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 5069 | sizeof(stateid_t)); |
b8dd7b9a | 5070 | status = 0; |
eb76b3fd AA |
5071 | break; |
5072 | case (EAGAIN): /* conflock holds conflicting lock */ | |
5073 | status = nfserr_denied; | |
5074 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 5075 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 5076 | break; |
1da177e4 LT |
5077 | case (EDEADLK): |
5078 | status = nfserr_deadlock; | |
eb76b3fd | 5079 | break; |
3e772463 | 5080 | default: |
fd85b817 | 5081 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 5082 | status = nfserrno(err); |
eb76b3fd | 5083 | break; |
1da177e4 | 5084 | } |
1da177e4 | 5085 | out: |
de18643d TM |
5086 | if (filp) |
5087 | fput(filp); | |
3d0fabd5 TM |
5088 | if (lock_stp) |
5089 | nfs4_put_stid(&lock_stp->st_stid); | |
0667b1e9 TM |
5090 | if (open_stp) |
5091 | nfs4_put_stid(&open_stp->st_stid); | |
64a284d0 | 5092 | if (status && new_state) |
c53530da | 5093 | release_lock_stateid(lock_stp); |
9411b1d4 | 5094 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5095 | nfs4_unlock_state(); |
21179d81 JL |
5096 | if (file_lock) |
5097 | locks_free_lock(file_lock); | |
5098 | if (conflock) | |
5099 | locks_free_lock(conflock); | |
1da177e4 LT |
5100 | return status; |
5101 | } | |
5102 | ||
55ef1274 BF |
5103 | /* |
5104 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
5105 | * so we do a temporary open here just to get an open file to pass to | |
5106 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
5107 | * inode operation.) | |
5108 | */ | |
04da6e9d | 5109 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
5110 | { |
5111 | struct file *file; | |
04da6e9d AV |
5112 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
5113 | if (!err) { | |
5114 | err = nfserrno(vfs_test_lock(file, lock)); | |
5115 | nfsd_close(file); | |
5116 | } | |
55ef1274 BF |
5117 | return err; |
5118 | } | |
5119 | ||
1da177e4 LT |
5120 | /* |
5121 | * LOCKT operation | |
5122 | */ | |
b37ad28b | 5123 | __be32 |
ca364317 BF |
5124 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
5125 | struct nfsd4_lockt *lockt) | |
1da177e4 | 5126 | { |
21179d81 | 5127 | struct file_lock *file_lock = NULL; |
fe0750e5 | 5128 | struct nfs4_lockowner *lo; |
b37ad28b | 5129 | __be32 status; |
7f2210fa | 5130 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5131 | |
5ccb0066 | 5132 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
5133 | return nfserr_grace; |
5134 | ||
5135 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
5136 | return nfserr_inval; | |
5137 | ||
1da177e4 LT |
5138 | nfs4_lock_state(); |
5139 | ||
9b2ef62b | 5140 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 5141 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
5142 | if (status) |
5143 | goto out; | |
5144 | } | |
1da177e4 | 5145 | |
75c096f7 | 5146 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 5147 | goto out; |
1da177e4 | 5148 | |
21179d81 JL |
5149 | file_lock = locks_alloc_lock(); |
5150 | if (!file_lock) { | |
5151 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5152 | status = nfserr_jukebox; | |
5153 | goto out; | |
5154 | } | |
5155 | locks_init_lock(file_lock); | |
1da177e4 LT |
5156 | switch (lockt->lt_type) { |
5157 | case NFS4_READ_LT: | |
5158 | case NFS4_READW_LT: | |
21179d81 | 5159 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
5160 | break; |
5161 | case NFS4_WRITE_LT: | |
5162 | case NFS4_WRITEW_LT: | |
21179d81 | 5163 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
5164 | break; |
5165 | default: | |
2fdada03 | 5166 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
5167 | status = nfserr_inval; |
5168 | goto out; | |
5169 | } | |
5170 | ||
b3c32bcd | 5171 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 5172 | if (lo) |
21179d81 JL |
5173 | file_lock->fl_owner = (fl_owner_t)lo; |
5174 | file_lock->fl_pid = current->tgid; | |
5175 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 5176 | |
21179d81 JL |
5177 | file_lock->fl_start = lockt->lt_offset; |
5178 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 5179 | |
21179d81 | 5180 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 5181 | |
21179d81 | 5182 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 5183 | if (status) |
fd85b817 | 5184 | goto out; |
04da6e9d | 5185 | |
21179d81 | 5186 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 5187 | status = nfserr_denied; |
21179d81 | 5188 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
5189 | } |
5190 | out: | |
5191 | nfs4_unlock_state(); | |
21179d81 JL |
5192 | if (file_lock) |
5193 | locks_free_lock(file_lock); | |
1da177e4 LT |
5194 | return status; |
5195 | } | |
5196 | ||
b37ad28b | 5197 | __be32 |
ca364317 | 5198 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 5199 | struct nfsd4_locku *locku) |
1da177e4 | 5200 | { |
dcef0413 | 5201 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5202 | struct file *filp = NULL; |
21179d81 | 5203 | struct file_lock *file_lock = NULL; |
b37ad28b | 5204 | __be32 status; |
b8dd7b9a | 5205 | int err; |
3320fef1 SK |
5206 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
5207 | ||
1da177e4 LT |
5208 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
5209 | (long long) locku->lu_offset, | |
5210 | (long long) locku->lu_length); | |
5211 | ||
5212 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
5213 | return nfserr_inval; | |
5214 | ||
5215 | nfs4_lock_state(); | |
5216 | ||
9072d5c6 | 5217 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
5218 | &locku->lu_stateid, NFS4_LOCK_STID, |
5219 | &stp, nn); | |
9072d5c6 | 5220 | if (status) |
1da177e4 | 5221 | goto out; |
11b9164a | 5222 | filp = find_any_file(stp->st_stid.sc_file); |
f9d7562f BF |
5223 | if (!filp) { |
5224 | status = nfserr_lock_range; | |
858cc573 | 5225 | goto put_stateid; |
f9d7562f | 5226 | } |
21179d81 JL |
5227 | file_lock = locks_alloc_lock(); |
5228 | if (!file_lock) { | |
5229 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
5230 | status = nfserr_jukebox; | |
de18643d | 5231 | goto fput; |
21179d81 JL |
5232 | } |
5233 | locks_init_lock(file_lock); | |
5234 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 5235 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
5236 | file_lock->fl_pid = current->tgid; |
5237 | file_lock->fl_file = filp; | |
5238 | file_lock->fl_flags = FL_POSIX; | |
5239 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
5240 | file_lock->fl_start = locku->lu_offset; | |
5241 | ||
5242 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
5243 | locku->lu_length); | |
5244 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 5245 | |
21179d81 | 5246 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 5247 | if (err) { |
fd85b817 | 5248 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
5249 | goto out_nfserr; |
5250 | } | |
dcef0413 BF |
5251 | update_stateid(&stp->st_stid.sc_stateid); |
5252 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
5253 | fput: |
5254 | fput(filp); | |
858cc573 TM |
5255 | put_stateid: |
5256 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 5257 | out: |
9411b1d4 | 5258 | nfsd4_bump_seqid(cstate, status); |
58fb12e6 | 5259 | nfs4_unlock_state(); |
21179d81 JL |
5260 | if (file_lock) |
5261 | locks_free_lock(file_lock); | |
1da177e4 LT |
5262 | return status; |
5263 | ||
5264 | out_nfserr: | |
b8dd7b9a | 5265 | status = nfserrno(err); |
de18643d | 5266 | goto fput; |
1da177e4 LT |
5267 | } |
5268 | ||
5269 | /* | |
5270 | * returns | |
f9c00c3a JL |
5271 | * true: locks held by lockowner |
5272 | * false: no locks held by lockowner | |
1da177e4 | 5273 | */ |
f9c00c3a JL |
5274 | static bool |
5275 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 LT |
5276 | { |
5277 | struct file_lock **flpp; | |
f9c00c3a JL |
5278 | int status = false; |
5279 | struct file *filp = find_any_file(fp); | |
5280 | struct inode *inode; | |
5281 | ||
5282 | if (!filp) { | |
5283 | /* Any valid lock stateid should have some sort of access */ | |
5284 | WARN_ON_ONCE(1); | |
5285 | return status; | |
5286 | } | |
5287 | ||
5288 | inode = file_inode(filp); | |
1da177e4 | 5289 | |
1c8c601a | 5290 | spin_lock(&inode->i_lock); |
1da177e4 | 5291 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 5292 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
f9c00c3a JL |
5293 | status = true; |
5294 | break; | |
796dadfd | 5295 | } |
1da177e4 | 5296 | } |
1c8c601a | 5297 | spin_unlock(&inode->i_lock); |
f9c00c3a | 5298 | fput(filp); |
1da177e4 LT |
5299 | return status; |
5300 | } | |
5301 | ||
b37ad28b | 5302 | __be32 |
b591480b BF |
5303 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
5304 | struct nfsd4_compound_state *cstate, | |
5305 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
5306 | { |
5307 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 5308 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 5309 | struct nfs4_lockowner *lo; |
dcef0413 | 5310 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5311 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 5312 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 5313 | __be32 status; |
7f2210fa | 5314 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
5315 | |
5316 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
5317 | clid->cl_boot, clid->cl_id); | |
5318 | ||
1da177e4 LT |
5319 | nfs4_lock_state(); |
5320 | ||
4b24ca7d | 5321 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
5322 | if (status) |
5323 | goto out; | |
5324 | ||
3e9e3dbe | 5325 | status = nfserr_locks_held; |
06f1f864 | 5326 | |
fd44907c JL |
5327 | /* Find the matching lock stateowner */ |
5328 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
5329 | if (tmp->so_is_open_owner) | |
06f1f864 | 5330 | continue; |
fd44907c JL |
5331 | if (same_owner_str(tmp, owner, clid)) { |
5332 | sop = tmp; | |
5333 | break; | |
1da177e4 | 5334 | } |
3e9e3dbe | 5335 | } |
fd44907c JL |
5336 | |
5337 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
5338 | if (!sop) { | |
5339 | status = nfs_ok; | |
5340 | goto out; | |
5341 | } | |
5342 | ||
5343 | lo = lockowner(sop); | |
5344 | /* see if there are still any locks associated with it */ | |
5345 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
11b9164a | 5346 | if (check_for_locks(stp->st_stid.sc_file, lo)) |
fd44907c | 5347 | goto out; |
1da177e4 | 5348 | } |
fd44907c JL |
5349 | |
5350 | status = nfs_ok; | |
5351 | release_lockowner(lo); | |
1da177e4 LT |
5352 | out: |
5353 | nfs4_unlock_state(); | |
5354 | return status; | |
5355 | } | |
5356 | ||
5357 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5358 | alloc_reclaim(void) |
1da177e4 | 5359 | { |
a55370a3 | 5360 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5361 | } |
5362 | ||
0ce0c2b5 | 5363 | bool |
52e19c09 | 5364 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5365 | { |
0ce0c2b5 | 5366 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5367 | |
52e19c09 | 5368 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5369 | return (crp && crp->cr_clp); |
c7b9a459 N |
5370 | } |
5371 | ||
1da177e4 LT |
5372 | /* |
5373 | * failure => all reset bets are off, nfserr_no_grace... | |
5374 | */ | |
772a9bbb | 5375 | struct nfs4_client_reclaim * |
52e19c09 | 5376 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5377 | { |
5378 | unsigned int strhashval; | |
772a9bbb | 5379 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5380 | |
a55370a3 N |
5381 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5382 | crp = alloc_reclaim(); | |
772a9bbb JL |
5383 | if (crp) { |
5384 | strhashval = clientstr_hashval(name); | |
5385 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5386 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5387 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5388 | crp->cr_clp = NULL; |
52e19c09 | 5389 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5390 | } |
5391 | return crp; | |
1da177e4 LT |
5392 | } |
5393 | ||
ce30e539 | 5394 | void |
52e19c09 | 5395 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5396 | { |
5397 | list_del(&crp->cr_strhash); | |
5398 | kfree(crp); | |
52e19c09 | 5399 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5400 | } |
5401 | ||
2a4317c5 | 5402 | void |
52e19c09 | 5403 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5404 | { |
5405 | struct nfs4_client_reclaim *crp = NULL; | |
5406 | int i; | |
5407 | ||
1da177e4 | 5408 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5409 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5410 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5411 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5412 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5413 | } |
5414 | } | |
063b0fb9 | 5415 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5416 | } |
5417 | ||
5418 | /* | |
5419 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5420 | struct nfs4_client_reclaim * |
52e19c09 | 5421 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5422 | { |
5423 | unsigned int strhashval; | |
1da177e4 LT |
5424 | struct nfs4_client_reclaim *crp = NULL; |
5425 | ||
278c931c | 5426 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5427 | |
278c931c | 5428 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5429 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5430 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5431 | return crp; |
5432 | } | |
5433 | } | |
5434 | return NULL; | |
5435 | } | |
5436 | ||
5437 | /* | |
5438 | * Called from OPEN. Look for clientid in reclaim list. | |
5439 | */ | |
b37ad28b | 5440 | __be32 |
0fe492db TM |
5441 | nfs4_check_open_reclaim(clientid_t *clid, |
5442 | struct nfsd4_compound_state *cstate, | |
5443 | struct nfsd_net *nn) | |
1da177e4 | 5444 | { |
0fe492db | 5445 | __be32 status; |
a52d726b JL |
5446 | |
5447 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5448 | status = lookup_clientid(clid, cstate, nn); |
5449 | if (status) | |
a52d726b JL |
5450 | return nfserr_reclaim_bad; |
5451 | ||
0fe492db TM |
5452 | if (nfsd4_client_record_check(cstate->clp)) |
5453 | return nfserr_reclaim_bad; | |
5454 | ||
5455 | return nfs_ok; | |
1da177e4 LT |
5456 | } |
5457 | ||
65178db4 BS |
5458 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5459 | ||
44e34da6 BS |
5460 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5461 | { | |
221a6876 BF |
5462 | if (mark_client_expired(clp)) |
5463 | return 0; | |
44e34da6 BS |
5464 | expire_client(clp); |
5465 | return 1; | |
5466 | } | |
5467 | ||
184c1847 BS |
5468 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5469 | { | |
5470 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5471 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5472 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5473 | return 1; | |
5474 | } | |
5475 | ||
5476 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5477 | const char *type) | |
5478 | { | |
5479 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5480 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5481 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5482 | } | |
5483 | ||
3c87b9b7 TM |
5484 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5485 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5486 | { |
5487 | struct nfs4_openowner *oop; | |
fc29171f | 5488 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5489 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5490 | u64 count = 0; |
5491 | ||
5492 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5493 | list_for_each_entry_safe(stp, st_next, |
5494 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5495 | list_for_each_entry_safe(lst, lst_next, | |
5496 | &stp->st_locks, st_locks) { | |
fc29171f | 5497 | if (func) |
3c87b9b7 | 5498 | func(lst); |
fc29171f BS |
5499 | if (++count == max) |
5500 | return count; | |
5501 | } | |
5502 | } | |
5503 | } | |
5504 | ||
5505 | return count; | |
5506 | } | |
5507 | ||
5508 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5509 | { | |
3c87b9b7 | 5510 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5511 | } |
5512 | ||
184c1847 BS |
5513 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5514 | { | |
5515 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5516 | nfsd_print_count(clp, count, "locked files"); | |
5517 | return count; | |
5518 | } | |
5519 | ||
4dbdbda8 BS |
5520 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5521 | { | |
5522 | struct nfs4_openowner *oop, *next; | |
5523 | u64 count = 0; | |
5524 | ||
5525 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5526 | if (func) | |
5527 | func(oop); | |
5528 | if (++count == max) | |
5529 | break; | |
5530 | } | |
5531 | ||
5532 | return count; | |
5533 | } | |
5534 | ||
5535 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5536 | { | |
5537 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5538 | } | |
5539 | ||
184c1847 BS |
5540 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5541 | { | |
5542 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5543 | nfsd_print_count(clp, count, "open files"); | |
5544 | return count; | |
5545 | } | |
5546 | ||
269de30f BS |
5547 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5548 | struct list_head *victims) | |
5549 | { | |
5550 | struct nfs4_delegation *dp, *next; | |
5551 | u64 count = 0; | |
5552 | ||
cdc97505 | 5553 | lockdep_assert_held(&state_lock); |
269de30f | 5554 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5555 | if (victims) { |
5556 | /* | |
5557 | * It's not safe to mess with delegations that have a | |
5558 | * non-zero dl_time. They might have already been broken | |
5559 | * and could be processed by the laundromat outside of | |
5560 | * the state_lock. Just leave them be. | |
5561 | */ | |
5562 | if (dp->dl_time != 0) | |
5563 | continue; | |
5564 | ||
42690676 JL |
5565 | unhash_delegation_locked(dp); |
5566 | list_add(&dp->dl_recall_lru, victims); | |
dff1399f | 5567 | } |
269de30f BS |
5568 | if (++count == max) |
5569 | break; | |
5570 | } | |
5571 | return count; | |
5572 | } | |
5573 | ||
5574 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5575 | { | |
5576 | struct nfs4_delegation *dp, *next; | |
5577 | LIST_HEAD(victims); | |
5578 | u64 count; | |
5579 | ||
cdc97505 | 5580 | spin_lock(&state_lock); |
269de30f | 5581 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5582 | spin_unlock(&state_lock); |
269de30f | 5583 | |
2d4a532d JL |
5584 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) { |
5585 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5586 | revoke_delegation(dp); |
2d4a532d | 5587 | } |
269de30f BS |
5588 | |
5589 | return count; | |
5590 | } | |
5591 | ||
5592 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5593 | { | |
dff1399f | 5594 | struct nfs4_delegation *dp; |
269de30f BS |
5595 | LIST_HEAD(victims); |
5596 | u64 count; | |
5597 | ||
cdc97505 | 5598 | spin_lock(&state_lock); |
269de30f | 5599 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5600 | while (!list_empty(&victims)) { |
5601 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5602 | dl_recall_lru); | |
5603 | list_del_init(&dp->dl_recall_lru); | |
5604 | dp->dl_time = 0; | |
269de30f | 5605 | nfsd_break_one_deleg(dp); |
dff1399f | 5606 | } |
cdc97505 | 5607 | spin_unlock(&state_lock); |
269de30f BS |
5608 | |
5609 | return count; | |
5610 | } | |
5611 | ||
184c1847 BS |
5612 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5613 | { | |
5614 | u64 count = 0; | |
5615 | ||
cdc97505 | 5616 | spin_lock(&state_lock); |
184c1847 | 5617 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5618 | spin_unlock(&state_lock); |
184c1847 BS |
5619 | |
5620 | nfsd_print_count(clp, count, "delegations"); | |
5621 | return count; | |
5622 | } | |
5623 | ||
44e34da6 | 5624 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5625 | { |
5626 | struct nfs4_client *clp, *next; | |
44e34da6 | 5627 | u64 count = 0; |
3320fef1 | 5628 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5629 | |
44e34da6 BS |
5630 | if (!nfsd_netns_ready(nn)) |
5631 | return 0; | |
5632 | ||
5ed58bb2 | 5633 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5634 | count += func(clp, max - count); |
5635 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5636 | break; |
5637 | } | |
65178db4 | 5638 | |
44e34da6 BS |
5639 | return count; |
5640 | } | |
5641 | ||
6c1e82a4 BS |
5642 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5643 | { | |
5644 | struct nfs4_client *clp; | |
5645 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5646 | ||
5647 | if (!nfsd_netns_ready(nn)) | |
5648 | return NULL; | |
5649 | ||
5650 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5651 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5652 | return clp; | |
5653 | } | |
5654 | return NULL; | |
5655 | } | |
5656 | ||
65178db4 BS |
5657 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5658 | ||
c2f1a551 MS |
5659 | /* |
5660 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5661 | * client may quite reasonably hang on to a delegation as long as it has | |
5662 | * the inode cached. This becomes an obvious problem the first time a | |
5663 | * client's inode cache approaches the size of the server's total memory. | |
5664 | * | |
5665 | * For now we avoid this problem by imposing a hard limit on the number | |
5666 | * of delegations, which varies according to the server's memory size. | |
5667 | */ | |
5668 | static void | |
5669 | set_max_delegations(void) | |
5670 | { | |
5671 | /* | |
5672 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5673 | * estimates suggest that in the worst case (where every delegation | |
5674 | * is for a different inode), a delegation could take about 1.5K, | |
5675 | * giving a worst case usage of about 6% of memory. | |
5676 | */ | |
5677 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5678 | } | |
5679 | ||
d85ed443 | 5680 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5681 | { |
5682 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5683 | int i; | |
5684 | ||
5685 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5686 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5687 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5688 | goto err; |
0a7ec377 SK |
5689 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5690 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5691 | if (!nn->unconf_id_hashtbl) | |
5692 | goto err_unconf_id; | |
9b531137 SK |
5693 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5694 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5695 | if (!nn->ownerstr_hashtbl) | |
5696 | goto err_ownerstr; | |
1872de0e SK |
5697 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5698 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5699 | if (!nn->sessionid_hashtbl) | |
5700 | goto err_sessionid; | |
8daae4dc | 5701 | |
382a62e7 | 5702 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5703 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5704 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5705 | } |
9b531137 SK |
5706 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5707 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5708 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5709 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5710 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5711 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5712 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5713 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5714 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5715 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5716 | |
09121281 | 5717 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5718 | get_net(net); |
09121281 | 5719 | |
8daae4dc | 5720 | return 0; |
382a62e7 | 5721 | |
1872de0e | 5722 | err_sessionid: |
20e9e2bc | 5723 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5724 | err_ownerstr: |
5725 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5726 | err_unconf_id: |
5727 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5728 | err: |
5729 | return -ENOMEM; | |
8daae4dc SK |
5730 | } |
5731 | ||
5732 | static void | |
4dce0ac9 | 5733 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5734 | { |
5735 | int i; | |
5736 | struct nfs4_client *clp = NULL; | |
5737 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5738 | ||
5739 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5740 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5741 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5742 | destroy_client(clp); | |
5743 | } | |
5744 | } | |
a99454aa | 5745 | |
2b905635 KM |
5746 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5747 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5748 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5749 | destroy_client(clp); | |
5750 | } | |
a99454aa SK |
5751 | } |
5752 | ||
1872de0e | 5753 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5754 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5755 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5756 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5757 | put_net(net); |
8daae4dc SK |
5758 | } |
5759 | ||
f252bc68 | 5760 | int |
d85ed443 | 5761 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5762 | { |
5e1533c7 | 5763 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5764 | int ret; |
5765 | ||
d85ed443 | 5766 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5767 | if (ret) |
5768 | return ret; | |
5e1533c7 | 5769 | nfsd4_client_tracking_init(net); |
2c142baa | 5770 | nn->boot_time = get_seconds(); |
5ccb0066 | 5771 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5772 | nn->grace_ended = false; |
d85ed443 | 5773 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5774 | nn->nfsd4_grace, net); |
5775 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5776 | return 0; |
5777 | } | |
5778 | ||
5779 | /* initialization to perform when the nfsd service is started: */ | |
5780 | ||
5781 | int | |
5782 | nfs4_state_start(void) | |
5783 | { | |
5784 | int ret; | |
5785 | ||
b5a1a81e | 5786 | ret = set_callback_cred(); |
d85ed443 SK |
5787 | if (ret) |
5788 | return -ENOMEM; | |
58da282b | 5789 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5790 | if (laundry_wq == NULL) { |
5791 | ret = -ENOMEM; | |
5792 | goto out_recovery; | |
5793 | } | |
b5a1a81e BF |
5794 | ret = nfsd4_create_callback_queue(); |
5795 | if (ret) | |
5796 | goto out_free_laundry; | |
09121281 | 5797 | |
c2f1a551 | 5798 | set_max_delegations(); |
d85ed443 | 5799 | |
b5a1a81e | 5800 | return 0; |
d85ed443 | 5801 | |
b5a1a81e BF |
5802 | out_free_laundry: |
5803 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5804 | out_recovery: |
b5a1a81e | 5805 | return ret; |
1da177e4 LT |
5806 | } |
5807 | ||
f252bc68 | 5808 | void |
4dce0ac9 | 5809 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5810 | { |
1da177e4 | 5811 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5812 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5813 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5814 | |
4dce0ac9 SK |
5815 | cancel_delayed_work_sync(&nn->laundromat_work); |
5816 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5817 | |
e50a26dc | 5818 | nfs4_lock_state(); |
1da177e4 | 5819 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5820 | spin_lock(&state_lock); |
e8c69d17 | 5821 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5822 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
42690676 JL |
5823 | unhash_delegation_locked(dp); |
5824 | list_add(&dp->dl_recall_lru, &reaplist); | |
1da177e4 | 5825 | } |
cdc97505 | 5826 | spin_unlock(&state_lock); |
1da177e4 LT |
5827 | list_for_each_safe(pos, next, &reaplist) { |
5828 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 5829 | list_del_init(&dp->dl_recall_lru); |
6011695d | 5830 | nfs4_put_stid(&dp->dl_stid); |
1da177e4 LT |
5831 | } |
5832 | ||
3320fef1 | 5833 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5834 | nfs4_state_destroy_net(net); |
e50a26dc | 5835 | nfs4_unlock_state(); |
1da177e4 LT |
5836 | } |
5837 | ||
5838 | void | |
5839 | nfs4_state_shutdown(void) | |
5840 | { | |
5e8d5c29 | 5841 | destroy_workqueue(laundry_wq); |
c3935e30 | 5842 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5843 | } |
8b70484c TM |
5844 | |
5845 | static void | |
5846 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5847 | { | |
37c593c5 TM |
5848 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5849 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5850 | } |
5851 | ||
5852 | static void | |
5853 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5854 | { | |
37c593c5 TM |
5855 | if (cstate->minorversion) { |
5856 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5857 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5858 | } | |
5859 | } | |
5860 | ||
5861 | void | |
5862 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5863 | { | |
5864 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5865 | } |
5866 | ||
62cd4a59 TM |
5867 | /* |
5868 | * functions to set current state id | |
5869 | */ | |
9428fe1a TM |
5870 | void |
5871 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5872 | { | |
5873 | put_stateid(cstate, &odp->od_stateid); | |
5874 | } | |
5875 | ||
8b70484c TM |
5876 | void |
5877 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5878 | { | |
5879 | put_stateid(cstate, &open->op_stateid); | |
5880 | } | |
5881 | ||
62cd4a59 TM |
5882 | void |
5883 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5884 | { | |
5885 | put_stateid(cstate, &close->cl_stateid); | |
5886 | } | |
5887 | ||
5888 | void | |
5889 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5890 | { | |
5891 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5892 | } | |
5893 | ||
5894 | /* | |
5895 | * functions to consume current state id | |
5896 | */ | |
1e97b519 | 5897 | |
9428fe1a TM |
5898 | void |
5899 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5900 | { | |
5901 | get_stateid(cstate, &odp->od_stateid); | |
5902 | } | |
5903 | ||
5904 | void | |
5905 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5906 | { | |
5907 | get_stateid(cstate, &drp->dr_stateid); | |
5908 | } | |
5909 | ||
1e97b519 TM |
5910 | void |
5911 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5912 | { | |
5913 | get_stateid(cstate, &fsp->fr_stateid); | |
5914 | } | |
5915 | ||
5916 | void | |
5917 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5918 | { | |
5919 | get_stateid(cstate, &setattr->sa_stateid); | |
5920 | } | |
5921 | ||
8b70484c TM |
5922 | void |
5923 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5924 | { | |
5925 | get_stateid(cstate, &close->cl_stateid); | |
5926 | } | |
5927 | ||
5928 | void | |
62cd4a59 | 5929 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5930 | { |
62cd4a59 | 5931 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5932 | } |
30813e27 TM |
5933 | |
5934 | void | |
5935 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5936 | { | |
5937 | get_stateid(cstate, &read->rd_stateid); | |
5938 | } | |
5939 | ||
5940 | void | |
5941 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5942 | { | |
5943 | get_stateid(cstate, &write->wr_stateid); | |
5944 | } |