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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 */ |
fe0750e5 | 73 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 74 | |
8b671b80 BF |
75 | /* Locking: */ |
76 | ||
77 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 78 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 79 | |
8b671b80 BF |
80 | /* |
81 | * Currently used for the del_recall_lru and file hash table. In an | |
82 | * effort to decrease the scope of the client_mutex, this spinlock may | |
83 | * eventually cover more: | |
84 | */ | |
cdc97505 | 85 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 86 | |
abf1135b CH |
87 | static struct kmem_cache *openowner_slab; |
88 | static struct kmem_cache *lockowner_slab; | |
89 | static struct kmem_cache *file_slab; | |
90 | static struct kmem_cache *stateid_slab; | |
91 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
f0f51f5c | 101 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 102 | { |
f0f51f5c | 103 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
104 | } |
105 | ||
f0f51f5c | 106 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 107 | { |
f0f51f5c | 108 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
109 | return nfserr_jukebox; |
110 | ses->se_flags |= NFS4_SESSION_DEAD; | |
111 | return nfs_ok; | |
508dc6e1 BH |
112 | } |
113 | ||
1da177e4 LT |
114 | void |
115 | nfs4_unlock_state(void) | |
116 | { | |
353ab6e9 | 117 | mutex_unlock(&client_mutex); |
1da177e4 LT |
118 | } |
119 | ||
221a6876 BF |
120 | static bool is_client_expired(struct nfs4_client *clp) |
121 | { | |
122 | return clp->cl_time == 0; | |
123 | } | |
124 | ||
125 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
126 | { | |
127 | if (atomic_read(&clp->cl_refcount)) | |
128 | return nfserr_jukebox; | |
129 | clp->cl_time = 0; | |
130 | return nfs_ok; | |
131 | } | |
132 | ||
133 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
134 | { | |
135 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
136 | __be32 ret; | |
137 | ||
138 | spin_lock(&nn->client_lock); | |
139 | ret = mark_client_expired_locked(clp); | |
140 | spin_unlock(&nn->client_lock); | |
141 | return ret; | |
142 | } | |
143 | ||
144 | static __be32 get_client_locked(struct nfs4_client *clp) | |
145 | { | |
146 | if (is_client_expired(clp)) | |
147 | return nfserr_expired; | |
148 | atomic_inc(&clp->cl_refcount); | |
149 | return nfs_ok; | |
150 | } | |
151 | ||
152 | /* must be called under the client_lock */ | |
153 | static inline void | |
154 | renew_client_locked(struct nfs4_client *clp) | |
155 | { | |
156 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
157 | ||
158 | if (is_client_expired(clp)) { | |
159 | WARN_ON(1); | |
160 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
161 | __func__, | |
162 | clp->cl_clientid.cl_boot, | |
163 | clp->cl_clientid.cl_id); | |
164 | return; | |
165 | } | |
166 | ||
167 | dprintk("renewing client (clientid %08x/%08x)\n", | |
168 | clp->cl_clientid.cl_boot, | |
169 | clp->cl_clientid.cl_id); | |
170 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
171 | clp->cl_time = get_seconds(); | |
172 | } | |
173 | ||
174 | static inline void | |
175 | renew_client(struct nfs4_client *clp) | |
176 | { | |
177 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
178 | ||
179 | spin_lock(&nn->client_lock); | |
180 | renew_client_locked(clp); | |
181 | spin_unlock(&nn->client_lock); | |
182 | } | |
183 | ||
ba138435 | 184 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
185 | { |
186 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
187 | return; | |
188 | if (!is_client_expired(clp)) | |
189 | renew_client_locked(clp); | |
190 | } | |
191 | ||
4b24ca7d JL |
192 | static void put_client_renew(struct nfs4_client *clp) |
193 | { | |
194 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
195 | ||
d6c249b4 JL |
196 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
197 | return; | |
198 | if (!is_client_expired(clp)) | |
199 | renew_client_locked(clp); | |
4b24ca7d JL |
200 | spin_unlock(&nn->client_lock); |
201 | } | |
202 | ||
d4e19e70 TM |
203 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
204 | { | |
205 | __be32 status; | |
206 | ||
207 | if (is_session_dead(ses)) | |
208 | return nfserr_badsession; | |
209 | status = get_client_locked(ses->se_client); | |
210 | if (status) | |
211 | return status; | |
212 | atomic_inc(&ses->se_ref); | |
213 | return nfs_ok; | |
214 | } | |
215 | ||
216 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
217 | { | |
218 | struct nfs4_client *clp = ses->se_client; | |
219 | ||
220 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
221 | free_session(ses); | |
222 | put_client_renew_locked(clp); | |
223 | } | |
224 | ||
225 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
226 | { | |
227 | struct nfs4_client *clp = ses->se_client; | |
228 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
229 | ||
230 | spin_lock(&nn->client_lock); | |
231 | nfsd4_put_session_locked(ses); | |
232 | spin_unlock(&nn->client_lock); | |
233 | } | |
234 | ||
235 | ||
1da177e4 LT |
236 | static inline u32 |
237 | opaque_hashval(const void *ptr, int nbytes) | |
238 | { | |
239 | unsigned char *cptr = (unsigned char *) ptr; | |
240 | ||
241 | u32 x = 0; | |
242 | while (nbytes--) { | |
243 | x *= 37; | |
244 | x += *cptr++; | |
245 | } | |
246 | return x; | |
247 | } | |
248 | ||
32513b40 BF |
249 | static void nfsd4_free_file(struct nfs4_file *f) |
250 | { | |
251 | kmem_cache_free(file_slab, f); | |
252 | } | |
253 | ||
13cd2184 N |
254 | static inline void |
255 | put_nfs4_file(struct nfs4_file *fi) | |
256 | { | |
cdc97505 | 257 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 258 | hlist_del(&fi->fi_hash); |
cdc97505 | 259 | spin_unlock(&state_lock); |
8b671b80 | 260 | iput(fi->fi_inode); |
32513b40 | 261 | nfsd4_free_file(fi); |
8b671b80 | 262 | } |
13cd2184 N |
263 | } |
264 | ||
265 | static inline void | |
266 | get_nfs4_file(struct nfs4_file *fi) | |
267 | { | |
8b671b80 | 268 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
269 | } |
270 | ||
de18643d TM |
271 | static struct file * |
272 | __nfs4_get_fd(struct nfs4_file *f, int oflag) | |
273 | { | |
274 | if (f->fi_fds[oflag]) | |
275 | return get_file(f->fi_fds[oflag]); | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | static struct file * | |
280 | find_writeable_file_locked(struct nfs4_file *f) | |
281 | { | |
282 | struct file *ret; | |
283 | ||
284 | lockdep_assert_held(&f->fi_lock); | |
285 | ||
286 | ret = __nfs4_get_fd(f, O_WRONLY); | |
287 | if (!ret) | |
288 | ret = __nfs4_get_fd(f, O_RDWR); | |
289 | return ret; | |
290 | } | |
291 | ||
292 | static struct file * | |
293 | find_writeable_file(struct nfs4_file *f) | |
294 | { | |
295 | struct file *ret; | |
296 | ||
297 | spin_lock(&f->fi_lock); | |
298 | ret = find_writeable_file_locked(f); | |
299 | spin_unlock(&f->fi_lock); | |
300 | ||
301 | return ret; | |
302 | } | |
303 | ||
304 | static struct file *find_readable_file_locked(struct nfs4_file *f) | |
305 | { | |
306 | struct file *ret; | |
307 | ||
308 | lockdep_assert_held(&f->fi_lock); | |
309 | ||
310 | ret = __nfs4_get_fd(f, O_RDONLY); | |
311 | if (!ret) | |
312 | ret = __nfs4_get_fd(f, O_RDWR); | |
313 | return ret; | |
314 | } | |
315 | ||
316 | static struct file * | |
317 | find_readable_file(struct nfs4_file *f) | |
318 | { | |
319 | struct file *ret; | |
320 | ||
321 | spin_lock(&f->fi_lock); | |
322 | ret = find_readable_file_locked(f); | |
323 | spin_unlock(&f->fi_lock); | |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
328 | static struct file * | |
329 | find_any_file(struct nfs4_file *f) | |
330 | { | |
331 | struct file *ret; | |
332 | ||
333 | spin_lock(&f->fi_lock); | |
334 | ret = __nfs4_get_fd(f, O_RDWR); | |
335 | if (!ret) { | |
336 | ret = __nfs4_get_fd(f, O_WRONLY); | |
337 | if (!ret) | |
338 | ret = __nfs4_get_fd(f, O_RDONLY); | |
339 | } | |
340 | spin_unlock(&f->fi_lock); | |
341 | return ret; | |
342 | } | |
343 | ||
ef0f3390 | 344 | static int num_delegations; |
697ce9be | 345 | unsigned long max_delegations; |
ef0f3390 N |
346 | |
347 | /* | |
348 | * Open owner state (share locks) | |
349 | */ | |
350 | ||
16bfdaaf BF |
351 | /* hash tables for lock and open owners */ |
352 | #define OWNER_HASH_BITS 8 | |
353 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
354 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 355 | |
16bfdaaf | 356 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
357 | { |
358 | unsigned int ret; | |
359 | ||
360 | ret = opaque_hashval(ownername->data, ownername->len); | |
361 | ret += clientid; | |
16bfdaaf | 362 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 363 | } |
ef0f3390 | 364 | |
ef0f3390 N |
365 | /* hash table for nfs4_file */ |
366 | #define FILE_HASH_BITS 8 | |
367 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 368 | |
ddc04c41 BF |
369 | static unsigned int file_hashval(struct inode *ino) |
370 | { | |
371 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
372 | return hash_ptr(ino, FILE_HASH_BITS); | |
373 | } | |
374 | ||
89876f8c | 375 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 376 | |
12659651 JL |
377 | static void |
378 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 379 | { |
12659651 JL |
380 | if (access & NFS4_SHARE_ACCESS_WRITE) |
381 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
382 | if (access & NFS4_SHARE_ACCESS_READ) | |
383 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
384 | } |
385 | ||
12659651 JL |
386 | static __be32 |
387 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 388 | { |
12659651 JL |
389 | /* Does this access mode make sense? */ |
390 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
391 | return nfserr_inval; | |
392 | ||
393 | __nfs4_file_get_access(fp, access); | |
394 | return nfs_ok; | |
998db52c BF |
395 | } |
396 | ||
998db52c | 397 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 398 | { |
de18643d TM |
399 | might_lock(&fp->fi_lock); |
400 | ||
401 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
402 | struct file *f1 = NULL; | |
403 | struct file *f2 = NULL; | |
404 | ||
6d338b51 | 405 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 406 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 407 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
408 | spin_unlock(&fp->fi_lock); |
409 | if (f1) | |
410 | fput(f1); | |
411 | if (f2) | |
412 | fput(f2); | |
f9d7562f BF |
413 | } |
414 | } | |
415 | ||
12659651 | 416 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 417 | { |
12659651 JL |
418 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
419 | ||
420 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 421 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
422 | if (access & NFS4_SHARE_ACCESS_READ) |
423 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
424 | } |
425 | ||
3abdb607 BF |
426 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
427 | kmem_cache *slab) | |
2a74aba7 | 428 | { |
3abdb607 | 429 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 430 | struct nfs4_stid *stid; |
6136d2b4 | 431 | int new_id; |
2a74aba7 | 432 | |
3abdb607 BF |
433 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
434 | if (!stid) | |
435 | return NULL; | |
436 | ||
398c33aa | 437 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 438 | if (new_id < 0) |
3abdb607 | 439 | goto out_free; |
2a74aba7 | 440 | stid->sc_client = cl; |
3abdb607 BF |
441 | stid->sc_type = 0; |
442 | stid->sc_stateid.si_opaque.so_id = new_id; | |
443 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 444 | /* Will be incremented before return to client: */ |
3abdb607 | 445 | stid->sc_stateid.si_generation = 0; |
996e0938 | 446 | |
996e0938 | 447 | /* |
3abdb607 BF |
448 | * It shouldn't be a problem to reuse an opaque stateid value. |
449 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
450 | * example, a stray write retransmission could be accepted by | |
451 | * the server when it should have been rejected. Therefore, | |
452 | * adopt a trick from the sctp code to attempt to maximize the | |
453 | * amount of time until an id is reused, by ensuring they always | |
454 | * "increase" (mod INT_MAX): | |
996e0938 | 455 | */ |
3abdb607 BF |
456 | return stid; |
457 | out_free: | |
2c44a234 | 458 | kmem_cache_free(slab, stid); |
3abdb607 | 459 | return NULL; |
2a74aba7 BF |
460 | } |
461 | ||
4cdc951b BF |
462 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
463 | { | |
464 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
465 | } | |
466 | ||
6282cd56 N |
467 | /* |
468 | * When we recall a delegation, we should be careful not to hand it | |
469 | * out again straight away. | |
470 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
471 | * in which the filehandles of recalled delegations are "stored". | |
472 | * If a filehandle appear in either filter, a delegation is blocked. | |
473 | * When a delegation is recalled, the filehandle is stored in the "new" | |
474 | * filter. | |
475 | * Every 30 seconds we swap the filters and clear the "new" one, | |
476 | * unless both are empty of course. | |
477 | * | |
478 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
479 | * low 3 bytes as hash-table indices. | |
480 | * | |
481 | * 'state_lock', which is always held when block_delegations() is called, | |
482 | * is used to manage concurrent access. Testing does not need the lock | |
483 | * except when swapping the two filters. | |
484 | */ | |
485 | static struct bloom_pair { | |
486 | int entries, old_entries; | |
487 | time_t swap_time; | |
488 | int new; /* index into 'set' */ | |
489 | DECLARE_BITMAP(set[2], 256); | |
490 | } blocked_delegations; | |
491 | ||
492 | static int delegation_blocked(struct knfsd_fh *fh) | |
493 | { | |
494 | u32 hash; | |
495 | struct bloom_pair *bd = &blocked_delegations; | |
496 | ||
497 | if (bd->entries == 0) | |
498 | return 0; | |
499 | if (seconds_since_boot() - bd->swap_time > 30) { | |
500 | spin_lock(&state_lock); | |
501 | if (seconds_since_boot() - bd->swap_time > 30) { | |
502 | bd->entries -= bd->old_entries; | |
503 | bd->old_entries = bd->entries; | |
504 | memset(bd->set[bd->new], 0, | |
505 | sizeof(bd->set[0])); | |
506 | bd->new = 1-bd->new; | |
507 | bd->swap_time = seconds_since_boot(); | |
508 | } | |
509 | spin_unlock(&state_lock); | |
510 | } | |
511 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
512 | if (test_bit(hash&255, bd->set[0]) && | |
513 | test_bit((hash>>8)&255, bd->set[0]) && | |
514 | test_bit((hash>>16)&255, bd->set[0])) | |
515 | return 1; | |
516 | ||
517 | if (test_bit(hash&255, bd->set[1]) && | |
518 | test_bit((hash>>8)&255, bd->set[1]) && | |
519 | test_bit((hash>>16)&255, bd->set[1])) | |
520 | return 1; | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static void block_delegations(struct knfsd_fh *fh) | |
526 | { | |
527 | u32 hash; | |
528 | struct bloom_pair *bd = &blocked_delegations; | |
529 | ||
530 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
531 | ||
532 | __set_bit(hash&255, bd->set[bd->new]); | |
533 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
534 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
535 | if (bd->entries == 0) | |
536 | bd->swap_time = seconds_since_boot(); | |
537 | bd->entries += 1; | |
538 | } | |
539 | ||
1da177e4 | 540 | static struct nfs4_delegation * |
99c41515 | 541 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
542 | { |
543 | struct nfs4_delegation *dp; | |
1da177e4 LT |
544 | |
545 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 546 | if (num_delegations > max_delegations) |
ef0f3390 | 547 | return NULL; |
6282cd56 N |
548 | if (delegation_blocked(¤t_fh->fh_handle)) |
549 | return NULL; | |
996e0938 | 550 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 551 | if (dp == NULL) |
1da177e4 | 552 | return dp; |
2a74aba7 BF |
553 | /* |
554 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
555 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
556 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
557 | */ |
558 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 559 | num_delegations++; |
ea1da636 N |
560 | INIT_LIST_HEAD(&dp->dl_perfile); |
561 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 562 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 563 | dp->dl_file = NULL; |
99c41515 | 564 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 565 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
566 | dp->dl_time = 0; |
567 | atomic_set(&dp->dl_count, 1); | |
57725155 | 568 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
569 | return dp; |
570 | } | |
571 | ||
68a33961 | 572 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
573 | { |
574 | struct idr *stateids = &s->sc_client->cl_stateids; | |
575 | ||
576 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
577 | } |
578 | ||
9857df81 BH |
579 | static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) |
580 | { | |
581 | kmem_cache_free(slab, s); | |
582 | } | |
583 | ||
1da177e4 LT |
584 | void |
585 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
586 | { | |
587 | if (atomic_dec_and_test(&dp->dl_count)) { | |
9857df81 | 588 | nfs4_free_stid(deleg_slab, &dp->dl_stid); |
ef0f3390 | 589 | num_delegations--; |
1da177e4 LT |
590 | } |
591 | } | |
592 | ||
acfdf5c3 | 593 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 594 | { |
cbf7a75b BF |
595 | if (!fp->fi_lease) |
596 | return; | |
acfdf5c3 BF |
597 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
598 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
599 | fp->fi_lease = NULL; | |
4ee63624 | 600 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
601 | fp->fi_deleg_file = NULL; |
602 | } | |
1da177e4 LT |
603 | } |
604 | ||
6136d2b4 BF |
605 | static void unhash_stid(struct nfs4_stid *s) |
606 | { | |
3abdb607 | 607 | s->sc_type = 0; |
6136d2b4 BF |
608 | } |
609 | ||
931ee56c BH |
610 | static void |
611 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
612 | { | |
cdc97505 | 613 | lockdep_assert_held(&state_lock); |
931ee56c | 614 | |
3fb87d13 | 615 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
616 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
617 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
618 | } | |
619 | ||
1da177e4 LT |
620 | /* Called under the state lock. */ |
621 | static void | |
622 | unhash_delegation(struct nfs4_delegation *dp) | |
623 | { | |
cdc97505 | 624 | spin_lock(&state_lock); |
931ee56c | 625 | list_del_init(&dp->dl_perclnt); |
5d926e8c | 626 | list_del_init(&dp->dl_perfile); |
1da177e4 | 627 | list_del_init(&dp->dl_recall_lru); |
cdc97505 | 628 | spin_unlock(&state_lock); |
cbf7a75b BF |
629 | if (dp->dl_file) { |
630 | nfs4_put_deleg_lease(dp->dl_file); | |
631 | put_nfs4_file(dp->dl_file); | |
632 | dp->dl_file = NULL; | |
633 | } | |
3bd64a5b BF |
634 | } |
635 | ||
636 | ||
637 | ||
638 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
639 | { | |
640 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 641 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
642 | nfs4_put_delegation(dp); |
643 | } | |
644 | ||
3bd64a5b BF |
645 | static void destroy_delegation(struct nfs4_delegation *dp) |
646 | { | |
647 | unhash_delegation(dp); | |
648 | remove_stid(&dp->dl_stid); | |
649 | nfs4_put_delegation(dp); | |
650 | } | |
651 | ||
652 | static void revoke_delegation(struct nfs4_delegation *dp) | |
653 | { | |
654 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
655 | ||
656 | if (clp->cl_minorversion == 0) | |
657 | destroy_delegation(dp); | |
658 | else { | |
659 | unhash_delegation(dp); | |
660 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
661 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
662 | } | |
663 | } | |
664 | ||
1da177e4 LT |
665 | /* |
666 | * SETCLIENTID state | |
667 | */ | |
668 | ||
ddc04c41 BF |
669 | static unsigned int clientid_hashval(u32 id) |
670 | { | |
671 | return id & CLIENT_HASH_MASK; | |
672 | } | |
673 | ||
674 | static unsigned int clientstr_hashval(const char *name) | |
675 | { | |
676 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
677 | } | |
678 | ||
f9d7562f BF |
679 | /* |
680 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
681 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
682 | * only what share bits are currently in force, but also what | |
683 | * combinations of share bits previous opens have used. This allows us | |
684 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
685 | * return an error if the client attempt to downgrade to a combination | |
686 | * of share bits not explicable by closing some of its previous opens. | |
687 | * | |
688 | * XXX: This enforcement is actually incomplete, since we don't keep | |
689 | * track of access/deny bit combinations; so, e.g., we allow: | |
690 | * | |
691 | * OPEN allow read, deny write | |
692 | * OPEN allow both, deny none | |
693 | * DOWNGRADE allow read, deny none | |
694 | * | |
695 | * which we should reject. | |
696 | */ | |
5ae037e5 JL |
697 | static unsigned int |
698 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 699 | int i; |
5ae037e5 | 700 | unsigned int access = 0; |
f9d7562f | 701 | |
f9d7562f BF |
702 | for (i = 1; i < 4; i++) { |
703 | if (test_bit(i, &bmap)) | |
5ae037e5 | 704 | access |= i; |
f9d7562f | 705 | } |
5ae037e5 | 706 | return access; |
f9d7562f BF |
707 | } |
708 | ||
3a328614 | 709 | static bool |
dcef0413 | 710 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
711 | unsigned int access, deny; |
712 | ||
5ae037e5 JL |
713 | access = bmap_to_share_mode(stp->st_access_bmap); |
714 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 715 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
716 | return false; |
717 | return true; | |
f9d7562f BF |
718 | } |
719 | ||
82c5ff1b JL |
720 | /* set share access for a given stateid */ |
721 | static inline void | |
722 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
723 | { | |
c11c591f JL |
724 | unsigned char mask = 1 << access; |
725 | ||
726 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
727 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
728 | } |
729 | ||
730 | /* clear share access for a given stateid */ | |
731 | static inline void | |
732 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
733 | { | |
c11c591f JL |
734 | unsigned char mask = 1 << access; |
735 | ||
736 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
737 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
738 | } |
739 | ||
740 | /* test whether a given stateid has access */ | |
741 | static inline bool | |
742 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
743 | { | |
c11c591f JL |
744 | unsigned char mask = 1 << access; |
745 | ||
746 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
747 | } |
748 | ||
ce0fc43c JL |
749 | /* set share deny for a given stateid */ |
750 | static inline void | |
c11c591f | 751 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 752 | { |
c11c591f JL |
753 | unsigned char mask = 1 << deny; |
754 | ||
755 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
756 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
757 | } |
758 | ||
759 | /* clear share deny for a given stateid */ | |
760 | static inline void | |
c11c591f | 761 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 762 | { |
c11c591f JL |
763 | unsigned char mask = 1 << deny; |
764 | ||
765 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
766 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
767 | } |
768 | ||
769 | /* test whether a given stateid is denying specific access */ | |
770 | static inline bool | |
c11c591f | 771 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 772 | { |
c11c591f JL |
773 | unsigned char mask = 1 << deny; |
774 | ||
775 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
776 | } |
777 | ||
778 | static int nfs4_access_to_omode(u32 access) | |
779 | { | |
8f34a430 | 780 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
781 | case NFS4_SHARE_ACCESS_READ: |
782 | return O_RDONLY; | |
783 | case NFS4_SHARE_ACCESS_WRITE: | |
784 | return O_WRONLY; | |
785 | case NFS4_SHARE_ACCESS_BOTH: | |
786 | return O_RDWR; | |
787 | } | |
063b0fb9 BF |
788 | WARN_ON_ONCE(1); |
789 | return O_RDONLY; | |
f9d7562f BF |
790 | } |
791 | ||
82c5ff1b JL |
792 | /* release all access and file references for a given stateid */ |
793 | static void | |
794 | release_all_access(struct nfs4_ol_stateid *stp) | |
795 | { | |
796 | int i; | |
797 | ||
798 | for (i = 1; i < 4; i++) { | |
799 | if (test_access(i, stp)) | |
12659651 | 800 | nfs4_file_put_access(stp->st_file, i); |
82c5ff1b JL |
801 | clear_access(i, stp); |
802 | } | |
803 | } | |
804 | ||
dcef0413 | 805 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 806 | { |
1d31a253 TM |
807 | struct nfs4_file *fp = stp->st_file; |
808 | ||
809 | spin_lock(&fp->fi_lock); | |
529d7b2a | 810 | list_del(&stp->st_perfile); |
1d31a253 | 811 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
812 | list_del(&stp->st_perstateowner); |
813 | } | |
814 | ||
dcef0413 | 815 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 816 | { |
82c5ff1b | 817 | release_all_access(stp); |
a96e5b90 | 818 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
819 | stp->st_file = NULL; |
820 | } | |
821 | ||
dcef0413 | 822 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 823 | { |
68a33961 | 824 | remove_stid(&stp->st_stid); |
9857df81 | 825 | nfs4_free_stid(stateid_slab, &stp->st_stid); |
529d7b2a BF |
826 | } |
827 | ||
3c87b9b7 | 828 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
829 | { |
830 | struct file *file; | |
831 | ||
3c87b9b7 | 832 | list_del(&stp->st_locks); |
529d7b2a | 833 | unhash_generic_stateid(stp); |
6136d2b4 | 834 | unhash_stid(&stp->st_stid); |
529d7b2a | 835 | file = find_any_file(stp->st_file); |
e20fcf1e TM |
836 | if (file) |
837 | filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner)); | |
38c387b5 | 838 | close_generic_stateid(stp); |
529d7b2a BF |
839 | free_generic_stateid(stp); |
840 | } | |
841 | ||
fe0750e5 | 842 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 843 | { |
dcef0413 | 844 | struct nfs4_ol_stateid *stp; |
529d7b2a | 845 | |
fe0750e5 | 846 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
847 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
848 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 849 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 850 | __release_lock_stateid(stp); |
529d7b2a BF |
851 | } |
852 | } | |
853 | ||
50cc6231 TM |
854 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
855 | { | |
856 | kfree(lo->lo_owner.so_owner.data); | |
857 | kmem_cache_free(lockowner_slab, lo); | |
858 | } | |
859 | ||
fe0750e5 | 860 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 861 | { |
fe0750e5 BF |
862 | unhash_lockowner(lo); |
863 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
864 | } |
865 | ||
3c87b9b7 TM |
866 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
867 | { | |
868 | if (list_empty(&lo->lo_owner.so_stateids)) | |
869 | release_lockowner(lo); | |
870 | } | |
871 | ||
872 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 873 | { |
fe0750e5 | 874 | struct nfs4_lockowner *lo; |
529d7b2a | 875 | |
3c87b9b7 TM |
876 | lo = lockowner(stp->st_stateowner); |
877 | __release_lock_stateid(stp); | |
878 | release_lockowner_if_empty(lo); | |
879 | } | |
880 | ||
881 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
882 | { | |
883 | struct nfs4_ol_stateid *stp; | |
884 | ||
885 | while (!list_empty(&open_stp->st_locks)) { | |
886 | stp = list_entry(open_stp->st_locks.next, | |
887 | struct nfs4_ol_stateid, st_locks); | |
888 | release_lock_stateid(stp); | |
529d7b2a BF |
889 | } |
890 | } | |
891 | ||
38c387b5 | 892 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
893 | { |
894 | unhash_generic_stateid(stp); | |
3c87b9b7 | 895 | release_open_stateid_locks(stp); |
38c387b5 BF |
896 | close_generic_stateid(stp); |
897 | } | |
898 | ||
899 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
900 | { | |
901 | unhash_open_stateid(stp); | |
2283963f BF |
902 | free_generic_stateid(stp); |
903 | } | |
904 | ||
fe0750e5 | 905 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 906 | { |
dcef0413 | 907 | struct nfs4_ol_stateid *stp; |
f1d110ca | 908 | |
fe0750e5 BF |
909 | list_del(&oo->oo_owner.so_strhash); |
910 | list_del(&oo->oo_perclient); | |
911 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
912 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 913 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 914 | release_open_stateid(stp); |
f1d110ca BF |
915 | } |
916 | } | |
917 | ||
f7a4d872 BF |
918 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
919 | { | |
920 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
921 | ||
922 | if (s) { | |
f7a4d872 BF |
923 | free_generic_stateid(s); |
924 | oo->oo_last_closed_stid = NULL; | |
925 | } | |
926 | } | |
927 | ||
50cc6231 TM |
928 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
929 | { | |
930 | kfree(oo->oo_owner.so_owner.data); | |
931 | kmem_cache_free(openowner_slab, oo); | |
932 | } | |
933 | ||
fe0750e5 | 934 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 935 | { |
fe0750e5 BF |
936 | unhash_openowner(oo); |
937 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 938 | release_last_closed_stateid(oo); |
fe0750e5 | 939 | nfs4_free_openowner(oo); |
f1d110ca BF |
940 | } |
941 | ||
5282fd72 ME |
942 | static inline int |
943 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
944 | { | |
945 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
946 | ||
947 | return sid->sequence % SESSION_HASH_SIZE; | |
948 | } | |
949 | ||
8f199b82 | 950 | #ifdef NFSD_DEBUG |
5282fd72 ME |
951 | static inline void |
952 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
953 | { | |
954 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
955 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
956 | } | |
8f199b82 TM |
957 | #else |
958 | static inline void | |
959 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
960 | { | |
961 | } | |
962 | #endif | |
963 | ||
9411b1d4 BF |
964 | /* |
965 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
966 | * won't be used for replay. | |
967 | */ | |
968 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
969 | { | |
970 | struct nfs4_stateowner *so = cstate->replay_owner; | |
971 | ||
972 | if (nfserr == nfserr_replay_me) | |
973 | return; | |
974 | ||
975 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
976 | cstate->replay_owner = NULL; | |
977 | return; | |
978 | } | |
979 | if (!so) | |
980 | return; | |
981 | if (so->so_is_open_owner) | |
982 | release_last_closed_stateid(openowner(so)); | |
983 | so->so_seqid++; | |
984 | return; | |
985 | } | |
5282fd72 | 986 | |
ec6b5d7b AA |
987 | static void |
988 | gen_sessionid(struct nfsd4_session *ses) | |
989 | { | |
990 | struct nfs4_client *clp = ses->se_client; | |
991 | struct nfsd4_sessionid *sid; | |
992 | ||
993 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
994 | sid->clientid = clp->cl_clientid; | |
995 | sid->sequence = current_sessionid++; | |
996 | sid->reserved = 0; | |
997 | } | |
998 | ||
999 | /* | |
a649637c AA |
1000 | * The protocol defines ca_maxresponssize_cached to include the size of |
1001 | * the rpc header, but all we need to cache is the data starting after | |
1002 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1003 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1004 | * value that is the number of bytes in our cache plus a few additional | |
1005 | * bytes. In order to stay on the safe side, and not promise more than | |
1006 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1007 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1008 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1009 | * for the SEQUENCE op response: | |
1010 | */ | |
1011 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1012 | ||
557ce264 AA |
1013 | static void |
1014 | free_session_slots(struct nfsd4_session *ses) | |
1015 | { | |
1016 | int i; | |
1017 | ||
1018 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1019 | kfree(ses->se_slots[i]); | |
1020 | } | |
1021 | ||
a649637c | 1022 | /* |
efe0cb6d BF |
1023 | * We don't actually need to cache the rpc and session headers, so we |
1024 | * can allocate a little less for each slot: | |
1025 | */ | |
55c760cf | 1026 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1027 | { |
55c760cf | 1028 | u32 size; |
efe0cb6d | 1029 | |
55c760cf BF |
1030 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1031 | size = 0; | |
1032 | else | |
1033 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1034 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1035 | } |
ec6b5d7b | 1036 | |
5b6feee9 BF |
1037 | /* |
1038 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1039 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1040 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1041 | */ |
55c760cf | 1042 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1043 | { |
55c760cf BF |
1044 | u32 slotsize = slot_bytes(ca); |
1045 | u32 num = ca->maxreqs; | |
5b6feee9 | 1046 | int avail; |
ec6b5d7b | 1047 | |
5b6feee9 | 1048 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1049 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1050 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1051 | num = min_t(int, num, avail / slotsize); |
1052 | nfsd_drc_mem_used += num * slotsize; | |
1053 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1054 | |
5b6feee9 BF |
1055 | return num; |
1056 | } | |
ec6b5d7b | 1057 | |
55c760cf | 1058 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1059 | { |
55c760cf BF |
1060 | int slotsize = slot_bytes(ca); |
1061 | ||
4bd9b0f4 | 1062 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1063 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1064 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1065 | } |
ec6b5d7b | 1066 | |
60810e54 KM |
1067 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1068 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1069 | { |
60810e54 KM |
1070 | int numslots = fattrs->maxreqs; |
1071 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1072 | struct nfsd4_session *new; |
1073 | int mem, i; | |
a649637c | 1074 | |
5b6feee9 BF |
1075 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1076 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1077 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1078 | |
5b6feee9 BF |
1079 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1080 | if (!new) | |
1081 | return NULL; | |
557ce264 | 1082 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1083 | for (i = 0; i < numslots; i++) { |
55c760cf | 1084 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1085 | if (!new->se_slots[i]) |
557ce264 | 1086 | goto out_free; |
557ce264 | 1087 | } |
60810e54 KM |
1088 | |
1089 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1090 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1091 | ||
5b6feee9 BF |
1092 | return new; |
1093 | out_free: | |
1094 | while (i--) | |
1095 | kfree(new->se_slots[i]); | |
1096 | kfree(new); | |
1097 | return NULL; | |
ec6b5d7b AA |
1098 | } |
1099 | ||
19cf5c02 BF |
1100 | static void free_conn(struct nfsd4_conn *c) |
1101 | { | |
1102 | svc_xprt_put(c->cn_xprt); | |
1103 | kfree(c); | |
1104 | } | |
ec6b5d7b | 1105 | |
19cf5c02 BF |
1106 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1107 | { | |
1108 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1109 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1110 | |
19cf5c02 BF |
1111 | spin_lock(&clp->cl_lock); |
1112 | if (!list_empty(&c->cn_persession)) { | |
1113 | list_del(&c->cn_persession); | |
1114 | free_conn(c); | |
1115 | } | |
eea49806 | 1116 | nfsd4_probe_callback(clp); |
2e4b7239 | 1117 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1118 | } |
ec6b5d7b | 1119 | |
d29c374c | 1120 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1121 | { |
c7662518 | 1122 | struct nfsd4_conn *conn; |
ec6b5d7b | 1123 | |
c7662518 BF |
1124 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1125 | if (!conn) | |
db90681d | 1126 | return NULL; |
c7662518 BF |
1127 | svc_xprt_get(rqstp->rq_xprt); |
1128 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1129 | conn->cn_flags = flags; |
db90681d BF |
1130 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1131 | return conn; | |
1132 | } | |
a649637c | 1133 | |
328ead28 BF |
1134 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1135 | { | |
1136 | conn->cn_session = ses; | |
1137 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1138 | } |
1139 | ||
db90681d | 1140 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1141 | { |
db90681d | 1142 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1143 | |
c7662518 | 1144 | spin_lock(&clp->cl_lock); |
328ead28 | 1145 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1146 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1147 | } |
1148 | ||
21b75b01 | 1149 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1150 | { |
19cf5c02 | 1151 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1152 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1153 | } |
1154 | ||
e1ff371f | 1155 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1156 | { |
21b75b01 | 1157 | int ret; |
ec6b5d7b | 1158 | |
db90681d | 1159 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1160 | ret = nfsd4_register_conn(conn); |
1161 | if (ret) | |
1162 | /* oops; xprt is already down: */ | |
1163 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 1164 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
1165 | /* callback channel may be back up */ |
1166 | nfsd4_probe_callback(ses->se_client); | |
1167 | } | |
c7662518 | 1168 | } |
ec6b5d7b | 1169 | |
e1ff371f | 1170 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1171 | { |
1172 | u32 dir = NFS4_CDFC4_FORE; | |
1173 | ||
e1ff371f | 1174 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1175 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1176 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1177 | } |
1178 | ||
1179 | /* must be called under client_lock */ | |
19cf5c02 | 1180 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1181 | { |
19cf5c02 BF |
1182 | struct nfs4_client *clp = s->se_client; |
1183 | struct nfsd4_conn *c; | |
ec6b5d7b | 1184 | |
19cf5c02 BF |
1185 | spin_lock(&clp->cl_lock); |
1186 | while (!list_empty(&s->se_conns)) { | |
1187 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1188 | list_del_init(&c->cn_persession); | |
1189 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1190 | |
19cf5c02 BF |
1191 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1192 | free_conn(c); | |
ec6b5d7b | 1193 | |
19cf5c02 BF |
1194 | spin_lock(&clp->cl_lock); |
1195 | } | |
1196 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1197 | } |
ec6b5d7b | 1198 | |
1377b69e BF |
1199 | static void __free_session(struct nfsd4_session *ses) |
1200 | { | |
1377b69e BF |
1201 | free_session_slots(ses); |
1202 | kfree(ses); | |
1203 | } | |
1204 | ||
66b2b9b2 | 1205 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1206 | { |
66b2b9b2 | 1207 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1208 | |
1209 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1210 | nfsd4_del_conns(ses); |
55c760cf | 1211 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1212 | __free_session(ses); |
c7662518 BF |
1213 | } |
1214 | ||
135ae827 | 1215 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1216 | { |
a827bcb2 | 1217 | int idx; |
1872de0e | 1218 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1219 | |
ec6b5d7b AA |
1220 | new->se_client = clp; |
1221 | gen_sessionid(new); | |
ec6b5d7b | 1222 | |
c7662518 BF |
1223 | INIT_LIST_HEAD(&new->se_conns); |
1224 | ||
ac7c46f2 | 1225 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1226 | new->se_flags = cses->flags; |
8b5ce5cd | 1227 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1228 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1229 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1230 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1231 | spin_lock(&nn->client_lock); |
1872de0e | 1232 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1233 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1234 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1235 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1236 | spin_unlock(&nn->client_lock); |
60810e54 | 1237 | |
dcbeaa68 | 1238 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1239 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1240 | /* |
1241 | * This is a little silly; with sessions there's no real | |
1242 | * use for the callback address. Use the peer address | |
1243 | * as a reasonable default for now, but consider fixing | |
1244 | * the rpc client not to require an address in the | |
1245 | * future: | |
1246 | */ | |
edd76786 BF |
1247 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1248 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1249 | } |
ec6b5d7b AA |
1250 | } |
1251 | ||
9089f1b4 | 1252 | /* caller must hold client_lock */ |
5282fd72 | 1253 | static struct nfsd4_session * |
d4e19e70 | 1254 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1255 | { |
1256 | struct nfsd4_session *elem; | |
1257 | int idx; | |
1872de0e | 1258 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1259 | |
1260 | dump_sessionid(__func__, sessionid); | |
1261 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1262 | /* Search in the appropriate list */ |
1872de0e | 1263 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1264 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1265 | NFS4_MAX_SESSIONID_LEN)) { | |
1266 | return elem; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | dprintk("%s: session not found\n", __func__); | |
1271 | return NULL; | |
1272 | } | |
1273 | ||
d4e19e70 TM |
1274 | static struct nfsd4_session * |
1275 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1276 | __be32 *ret) | |
1277 | { | |
1278 | struct nfsd4_session *session; | |
1279 | __be32 status = nfserr_badsession; | |
1280 | ||
1281 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1282 | if (!session) | |
1283 | goto out; | |
1284 | status = nfsd4_get_session_locked(session); | |
1285 | if (status) | |
1286 | session = NULL; | |
1287 | out: | |
1288 | *ret = status; | |
1289 | return session; | |
1290 | } | |
1291 | ||
9089f1b4 | 1292 | /* caller must hold client_lock */ |
7116ed6b | 1293 | static void |
5282fd72 | 1294 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1295 | { |
1296 | list_del(&ses->se_hash); | |
4c649378 | 1297 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1298 | list_del(&ses->se_perclnt); |
4c649378 | 1299 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1300 | } |
1301 | ||
1da177e4 LT |
1302 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1303 | static int | |
2c142baa | 1304 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1305 | { |
2c142baa | 1306 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1307 | return 0; |
60adfc50 | 1308 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1309 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1310 | return 1; |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * XXX Should we use a slab cache ? | |
1315 | * This type of memory management is somewhat inefficient, but we use it | |
1316 | * anyway since SETCLIENTID is not a common operation. | |
1317 | */ | |
35bba9a3 | 1318 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1319 | { |
1320 | struct nfs4_client *clp; | |
1321 | ||
35bba9a3 BF |
1322 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1323 | if (clp == NULL) | |
1324 | return NULL; | |
67114fe6 | 1325 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1326 | if (clp->cl_name.data == NULL) { |
1327 | kfree(clp); | |
1328 | return NULL; | |
1da177e4 | 1329 | } |
35bba9a3 | 1330 | clp->cl_name.len = name.len; |
5694c93e TM |
1331 | INIT_LIST_HEAD(&clp->cl_sessions); |
1332 | idr_init(&clp->cl_stateids); | |
1333 | atomic_set(&clp->cl_refcount, 0); | |
1334 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1335 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1336 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1337 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1338 | INIT_LIST_HEAD(&clp->cl_lru); | |
1339 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1340 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1341 | spin_lock_init(&clp->cl_lock); | |
1342 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1343 | return clp; |
1344 | } | |
1345 | ||
4dd86e15 | 1346 | static void |
1da177e4 LT |
1347 | free_client(struct nfs4_client *clp) |
1348 | { | |
bca0ec65 | 1349 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1350 | |
1351 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1352 | while (!list_empty(&clp->cl_sessions)) { |
1353 | struct nfsd4_session *ses; | |
1354 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1355 | se_perclnt); | |
1356 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1357 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1358 | free_session(ses); | |
792c95dd | 1359 | } |
4cb57e30 | 1360 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1361 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1362 | kfree(clp->cl_name.data); |
2d32b29a | 1363 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1364 | kfree(clp); |
1365 | } | |
1366 | ||
84d38ac9 BH |
1367 | /* must be called under the client_lock */ |
1368 | static inline void | |
1369 | unhash_client_locked(struct nfs4_client *clp) | |
1370 | { | |
792c95dd BF |
1371 | struct nfsd4_session *ses; |
1372 | ||
84d38ac9 | 1373 | list_del(&clp->cl_lru); |
4c649378 | 1374 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1375 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1376 | list_del_init(&ses->se_hash); | |
4c649378 | 1377 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1378 | } |
1379 | ||
1da177e4 | 1380 | static void |
0d22f68f | 1381 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1382 | { |
fe0750e5 | 1383 | struct nfs4_openowner *oo; |
1da177e4 | 1384 | struct nfs4_delegation *dp; |
1da177e4 | 1385 | struct list_head reaplist; |
382a62e7 | 1386 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1387 | |
1da177e4 | 1388 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1389 | spin_lock(&state_lock); |
ea1da636 N |
1390 | while (!list_empty(&clp->cl_delegations)) { |
1391 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1392 | list_del_init(&dp->dl_perclnt); |
dff1399f JL |
1393 | /* Ensure that deleg break won't try to requeue it */ |
1394 | ++dp->dl_time; | |
1da177e4 LT |
1395 | list_move(&dp->dl_recall_lru, &reaplist); |
1396 | } | |
cdc97505 | 1397 | spin_unlock(&state_lock); |
1da177e4 LT |
1398 | while (!list_empty(&reaplist)) { |
1399 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1400 | destroy_delegation(dp); |
1da177e4 | 1401 | } |
956c4fee BH |
1402 | list_splice_init(&clp->cl_revoked, &reaplist); |
1403 | while (!list_empty(&reaplist)) { | |
1404 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1405 | destroy_revoked_delegation(dp); | |
1406 | } | |
ea1da636 | 1407 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1408 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1409 | release_openowner(oo); | |
1da177e4 | 1410 | } |
6ff8da08 | 1411 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1412 | if (clp->cl_cb_conn.cb_xprt) |
1413 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1414 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1415 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1416 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1417 | else |
a99454aa | 1418 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1419 | spin_lock(&nn->client_lock); |
84d38ac9 | 1420 | unhash_client_locked(clp); |
221a6876 BF |
1421 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1422 | free_client(clp); | |
c9a49628 | 1423 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1424 | } |
1425 | ||
0d22f68f BF |
1426 | static void expire_client(struct nfs4_client *clp) |
1427 | { | |
1428 | nfsd4_client_record_remove(clp); | |
1429 | destroy_client(clp); | |
1430 | } | |
1431 | ||
35bba9a3 BF |
1432 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1433 | { | |
1434 | memcpy(target->cl_verifier.data, source->data, | |
1435 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1436 | } |
1437 | ||
35bba9a3 BF |
1438 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1439 | { | |
1da177e4 LT |
1440 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1441 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1442 | } | |
1443 | ||
03a4e1f6 | 1444 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1445 | { |
03a4e1f6 BF |
1446 | if (source->cr_principal) { |
1447 | target->cr_principal = | |
1448 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1449 | if (target->cr_principal == NULL) | |
1450 | return -ENOMEM; | |
1451 | } else | |
1452 | target->cr_principal = NULL; | |
d5497fc6 | 1453 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1454 | target->cr_uid = source->cr_uid; |
1455 | target->cr_gid = source->cr_gid; | |
1456 | target->cr_group_info = source->cr_group_info; | |
1457 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1458 | target->cr_gss_mech = source->cr_gss_mech; |
1459 | if (source->cr_gss_mech) | |
1460 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1461 | return 0; |
1da177e4 LT |
1462 | } |
1463 | ||
ac55fdc4 JL |
1464 | static long long |
1465 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1466 | { | |
1467 | long long res; | |
1468 | ||
1469 | res = o1->len - o2->len; | |
1470 | if (res) | |
1471 | return res; | |
1472 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1473 | } | |
1474 | ||
35bba9a3 | 1475 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1476 | { |
a55370a3 | 1477 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1478 | } |
1479 | ||
1480 | static int | |
599e0a22 BF |
1481 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1482 | { | |
1483 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1484 | } |
1485 | ||
1486 | static int | |
599e0a22 BF |
1487 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1488 | { | |
1489 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1490 | } |
1491 | ||
8fbba96e BF |
1492 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1493 | { | |
1494 | int i; | |
1495 | ||
1496 | if (g1->ngroups != g2->ngroups) | |
1497 | return false; | |
1498 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1499 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1500 | return false; |
1501 | return true; | |
1502 | } | |
1503 | ||
68eb3508 BF |
1504 | /* |
1505 | * RFC 3530 language requires clid_inuse be returned when the | |
1506 | * "principal" associated with a requests differs from that previously | |
1507 | * used. We use uid, gid's, and gss principal string as our best | |
1508 | * approximation. We also don't want to allow non-gss use of a client | |
1509 | * established using gss: in theory cr_principal should catch that | |
1510 | * change, but in practice cr_principal can be null even in the gss case | |
1511 | * since gssd doesn't always pass down a principal string. | |
1512 | */ | |
1513 | static bool is_gss_cred(struct svc_cred *cr) | |
1514 | { | |
1515 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1516 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1517 | } | |
1518 | ||
1519 | ||
5559b50a | 1520 | static bool |
599e0a22 BF |
1521 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1522 | { | |
68eb3508 | 1523 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1524 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1525 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1526 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1527 | return false; | |
1528 | if (cr1->cr_principal == cr2->cr_principal) | |
1529 | return true; | |
1530 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1531 | return false; | |
5559b50a | 1532 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1533 | } |
1534 | ||
57266a6e BF |
1535 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1536 | { | |
1537 | struct svc_cred *cr = &rqstp->rq_cred; | |
1538 | u32 service; | |
1539 | ||
c4720591 BF |
1540 | if (!cr->cr_gss_mech) |
1541 | return false; | |
57266a6e BF |
1542 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1543 | return service == RPC_GSS_SVC_INTEGRITY || | |
1544 | service == RPC_GSS_SVC_PRIVACY; | |
1545 | } | |
1546 | ||
1547 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1548 | { | |
1549 | struct svc_cred *cr = &rqstp->rq_cred; | |
1550 | ||
1551 | if (!cl->cl_mach_cred) | |
1552 | return true; | |
1553 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1554 | return false; | |
1555 | if (!svc_rqst_integrity_protected(rqstp)) | |
1556 | return false; | |
1557 | if (!cr->cr_principal) | |
1558 | return false; | |
1559 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1560 | } | |
1561 | ||
c212cecf | 1562 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1563 | { |
1564 | static u32 current_clientid = 1; | |
1565 | ||
2c142baa | 1566 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1567 | clp->cl_clientid.cl_id = current_clientid++; |
1568 | } | |
1569 | ||
deda2faa BF |
1570 | static void gen_confirm(struct nfs4_client *clp) |
1571 | { | |
ab4684d1 | 1572 | __be32 verf[2]; |
deda2faa | 1573 | static u32 i; |
1da177e4 | 1574 | |
f419992c JL |
1575 | /* |
1576 | * This is opaque to client, so no need to byte-swap. Use | |
1577 | * __force to keep sparse happy | |
1578 | */ | |
1579 | verf[0] = (__force __be32)get_seconds(); | |
1580 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1581 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1582 | } |
1583 | ||
38c2f4b1 | 1584 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1585 | { |
3abdb607 BF |
1586 | struct nfs4_stid *ret; |
1587 | ||
1588 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1589 | if (!ret || !ret->sc_type) | |
1590 | return NULL; | |
1591 | return ret; | |
4d71ab87 BF |
1592 | } |
1593 | ||
38c2f4b1 | 1594 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1595 | { |
1596 | struct nfs4_stid *s; | |
4d71ab87 | 1597 | |
38c2f4b1 | 1598 | s = find_stateid(cl, t); |
4d71ab87 BF |
1599 | if (!s) |
1600 | return NULL; | |
f459e453 | 1601 | if (typemask & s->sc_type) |
4581d140 | 1602 | return s; |
4581d140 BF |
1603 | return NULL; |
1604 | } | |
1605 | ||
2216d449 | 1606 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1607 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1608 | { | |
1609 | struct nfs4_client *clp; | |
1610 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1611 | int ret; |
c212cecf | 1612 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1613 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1614 | |
1615 | clp = alloc_client(name); | |
1616 | if (clp == NULL) | |
1617 | return NULL; | |
1618 | ||
03a4e1f6 BF |
1619 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1620 | if (ret) { | |
c9a49628 | 1621 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1622 | free_client(clp); |
c9a49628 | 1623 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1624 | return NULL; |
b09333c4 | 1625 | } |
57725155 | 1626 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1627 | clp->cl_time = get_seconds(); |
b09333c4 | 1628 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1629 | copy_verf(clp, verf); |
1630 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1631 | gen_confirm(clp); |
edd76786 | 1632 | clp->cl_cb_session = NULL; |
c212cecf | 1633 | clp->net = net; |
b09333c4 RL |
1634 | return clp; |
1635 | } | |
1636 | ||
fd39ca9a | 1637 | static void |
ac55fdc4 JL |
1638 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1639 | { | |
1640 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1641 | struct nfs4_client *clp; | |
1642 | ||
1643 | while (*new) { | |
1644 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1645 | parent = *new; | |
1646 | ||
1647 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1648 | new = &((*new)->rb_left); | |
1649 | else | |
1650 | new = &((*new)->rb_right); | |
1651 | } | |
1652 | ||
1653 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1654 | rb_insert_color(&new_clp->cl_namenode, root); | |
1655 | } | |
1656 | ||
1657 | static struct nfs4_client * | |
1658 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1659 | { | |
1660 | long long cmp; | |
1661 | struct rb_node *node = root->rb_node; | |
1662 | struct nfs4_client *clp; | |
1663 | ||
1664 | while (node) { | |
1665 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1666 | cmp = compare_blob(&clp->cl_name, name); | |
1667 | if (cmp > 0) | |
1668 | node = node->rb_left; | |
1669 | else if (cmp < 0) | |
1670 | node = node->rb_right; | |
1671 | else | |
1672 | return clp; | |
1673 | } | |
1674 | return NULL; | |
1675 | } | |
1676 | ||
1677 | static void | |
1678 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1679 | { |
1680 | unsigned int idhashval; | |
0a7ec377 | 1681 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1682 | |
ac55fdc4 | 1683 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1684 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1685 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1686 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1687 | renew_client(clp); |
1da177e4 LT |
1688 | } |
1689 | ||
fd39ca9a | 1690 | static void |
1da177e4 LT |
1691 | move_to_confirmed(struct nfs4_client *clp) |
1692 | { | |
1693 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1694 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1695 | |
1696 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1697 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1698 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1699 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1700 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1701 | renew_client(clp); |
1702 | } | |
1703 | ||
1704 | static struct nfs4_client * | |
bfa85e83 | 1705 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1706 | { |
1707 | struct nfs4_client *clp; | |
1708 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1709 | ||
bfa85e83 | 1710 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1711 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1712 | if ((bool)clp->cl_minorversion != sessions) |
1713 | return NULL; | |
a50d2ad1 | 1714 | renew_client(clp); |
1da177e4 | 1715 | return clp; |
a50d2ad1 | 1716 | } |
1da177e4 LT |
1717 | } |
1718 | return NULL; | |
1719 | } | |
1720 | ||
bfa85e83 BF |
1721 | static struct nfs4_client * |
1722 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1723 | { | |
1724 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1725 | ||
1726 | return find_client_in_id_table(tbl, clid, sessions); | |
1727 | } | |
1728 | ||
1da177e4 | 1729 | static struct nfs4_client * |
0a7ec377 | 1730 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1731 | { |
bfa85e83 | 1732 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1733 | |
bfa85e83 | 1734 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1735 | } |
1736 | ||
6e5f15c9 | 1737 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1738 | { |
6e5f15c9 | 1739 | return clp->cl_exchange_flags != 0; |
e203d506 | 1740 | } |
a1bcecd2 | 1741 | |
28ce6054 | 1742 | static struct nfs4_client * |
382a62e7 | 1743 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1744 | { |
382a62e7 | 1745 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1746 | } |
1747 | ||
1748 | static struct nfs4_client * | |
a99454aa | 1749 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1750 | { |
a99454aa | 1751 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1752 | } |
1753 | ||
fd39ca9a | 1754 | static void |
6f3d772f | 1755 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1756 | { |
07263f1e | 1757 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1758 | struct sockaddr *sa = svc_addr(rqstp); |
1759 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1760 | unsigned short expected_family; |
1761 | ||
1762 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1763 | if (se->se_callback_netid_len == 3 && | |
1764 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1765 | expected_family = AF_INET; | |
1766 | else if (se->se_callback_netid_len == 4 && | |
1767 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1768 | expected_family = AF_INET6; | |
1769 | else | |
1da177e4 LT |
1770 | goto out_err; |
1771 | ||
c212cecf | 1772 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1773 | se->se_callback_addr_len, |
07263f1e BF |
1774 | (struct sockaddr *)&conn->cb_addr, |
1775 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1776 | |
07263f1e | 1777 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1778 | goto out_err; |
aa9a4ec7 | 1779 | |
07263f1e BF |
1780 | if (conn->cb_addr.ss_family == AF_INET6) |
1781 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1782 | |
07263f1e BF |
1783 | conn->cb_prog = se->se_callback_prog; |
1784 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1785 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1786 | return; |
1787 | out_err: | |
07263f1e BF |
1788 | conn->cb_addr.ss_family = AF_UNSPEC; |
1789 | conn->cb_addrlen = 0; | |
849823c5 | 1790 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1791 | "will not receive delegations\n", |
1792 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1793 | ||
1da177e4 LT |
1794 | return; |
1795 | } | |
1796 | ||
074fe897 | 1797 | /* |
067e1ace | 1798 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1799 | */ |
b607664e | 1800 | static void |
074fe897 | 1801 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1802 | { |
f5236013 | 1803 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1804 | struct nfsd4_slot *slot = resp->cstate.slot; |
1805 | unsigned int base; | |
074fe897 | 1806 | |
557ce264 | 1807 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1808 | |
557ce264 AA |
1809 | slot->sl_opcnt = resp->opcnt; |
1810 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1811 | |
bf5c43c8 | 1812 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1813 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1814 | slot->sl_datalen = 0; |
bf864a31 | 1815 | return; |
074fe897 | 1816 | } |
f5236013 BF |
1817 | base = resp->cstate.data_offset; |
1818 | slot->sl_datalen = buf->len - base; | |
1819 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1820 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1821 | return; | |
074fe897 AA |
1822 | } |
1823 | ||
1824 | /* | |
abfabf8c AA |
1825 | * Encode the replay sequence operation from the slot values. |
1826 | * If cachethis is FALSE encode the uncached rep error on the next | |
1827 | * operation which sets resp->p and increments resp->opcnt for | |
1828 | * nfs4svc_encode_compoundres. | |
074fe897 | 1829 | * |
074fe897 | 1830 | */ |
abfabf8c AA |
1831 | static __be32 |
1832 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1833 | struct nfsd4_compoundres *resp) | |
074fe897 | 1834 | { |
abfabf8c AA |
1835 | struct nfsd4_op *op; |
1836 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1837 | |
abfabf8c AA |
1838 | /* Encode the replayed sequence operation */ |
1839 | op = &args->ops[resp->opcnt - 1]; | |
1840 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1841 | |
abfabf8c | 1842 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1843 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1844 | op = &args->ops[resp->opcnt++]; |
1845 | op->status = nfserr_retry_uncached_rep; | |
1846 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1847 | } |
abfabf8c | 1848 | return op->status; |
074fe897 AA |
1849 | } |
1850 | ||
1851 | /* | |
557ce264 AA |
1852 | * The sequence operation is not cached because we can use the slot and |
1853 | * session values. | |
074fe897 | 1854 | */ |
3ca2eb98 | 1855 | static __be32 |
bf864a31 AA |
1856 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1857 | struct nfsd4_sequence *seq) | |
074fe897 | 1858 | { |
557ce264 | 1859 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1860 | struct xdr_stream *xdr = &resp->xdr; |
1861 | __be32 *p; | |
074fe897 AA |
1862 | __be32 status; |
1863 | ||
557ce264 | 1864 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1865 | |
abfabf8c | 1866 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1867 | if (status) |
abfabf8c | 1868 | return status; |
074fe897 | 1869 | |
f5236013 BF |
1870 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1871 | if (!p) { | |
1872 | WARN_ON_ONCE(1); | |
1873 | return nfserr_serverfault; | |
1874 | } | |
1875 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1876 | xdr_commit_encode(xdr); | |
074fe897 | 1877 | |
557ce264 | 1878 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1879 | return slot->sl_status; |
074fe897 AA |
1880 | } |
1881 | ||
0733d213 AA |
1882 | /* |
1883 | * Set the exchange_id flags returned by the server. | |
1884 | */ | |
1885 | static void | |
1886 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1887 | { | |
1888 | /* pNFS is not supported */ | |
1889 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1890 | ||
1891 | /* Referrals are supported, Migration is not. */ | |
1892 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1893 | ||
1894 | /* set the wire flags to return to client. */ | |
1895 | clid->flags = new->cl_exchange_flags; | |
1896 | } | |
1897 | ||
631fc9ea BF |
1898 | static bool client_has_state(struct nfs4_client *clp) |
1899 | { | |
1900 | /* | |
1901 | * Note clp->cl_openowners check isn't quite right: there's no | |
1902 | * need to count owners without stateid's. | |
1903 | * | |
1904 | * Also note we should probably be using this in 4.0 case too. | |
1905 | */ | |
6eccece9 BF |
1906 | return !list_empty(&clp->cl_openowners) |
1907 | || !list_empty(&clp->cl_delegations) | |
1908 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1909 | } |
1910 | ||
069b6ad4 AA |
1911 | __be32 |
1912 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1913 | struct nfsd4_compound_state *cstate, | |
1914 | struct nfsd4_exchange_id *exid) | |
1915 | { | |
0733d213 | 1916 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1917 | __be32 status; |
363168b4 | 1918 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1919 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1920 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1921 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1922 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1923 | |
363168b4 | 1924 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1925 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1926 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1927 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1928 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1929 | |
a084daf5 | 1930 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1931 | return nfserr_inval; |
1932 | ||
0733d213 | 1933 | switch (exid->spa_how) { |
57266a6e BF |
1934 | case SP4_MACH_CRED: |
1935 | if (!svc_rqst_integrity_protected(rqstp)) | |
1936 | return nfserr_inval; | |
0733d213 AA |
1937 | case SP4_NONE: |
1938 | break; | |
063b0fb9 BF |
1939 | default: /* checked by xdr code */ |
1940 | WARN_ON_ONCE(1); | |
0733d213 | 1941 | case SP4_SSV: |
dd30333c | 1942 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1943 | } |
1944 | ||
2dbb269d | 1945 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1946 | nfs4_lock_state(); |
382a62e7 | 1947 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1948 | if (conf) { |
83e08fd4 BF |
1949 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1950 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1951 | ||
136e658d BF |
1952 | if (update) { |
1953 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1954 | status = nfserr_inval; |
1a308118 BF |
1955 | goto out; |
1956 | } | |
57266a6e BF |
1957 | if (!mach_creds_match(conf, rqstp)) { |
1958 | status = nfserr_wrong_cred; | |
1959 | goto out; | |
1960 | } | |
136e658d | 1961 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1962 | status = nfserr_perm; |
136e658d BF |
1963 | goto out; |
1964 | } | |
1965 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1966 | status = nfserr_not_same; |
1967 | goto out; | |
1968 | } | |
136e658d BF |
1969 | /* case 6 */ |
1970 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1971 | new = conf; | |
1972 | goto out_copy; | |
0733d213 | 1973 | } |
136e658d | 1974 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1975 | if (client_has_state(conf)) { |
1976 | status = nfserr_clid_inuse; | |
0733d213 AA |
1977 | goto out; |
1978 | } | |
1979 | expire_client(conf); | |
1980 | goto out_new; | |
1981 | } | |
136e658d | 1982 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1983 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1984 | new = conf; |
1985 | goto out_copy; | |
1986 | } | |
1987 | /* case 5, client reboot */ | |
136e658d | 1988 | goto out_new; |
6ddbbbfe MS |
1989 | } |
1990 | ||
2dbb269d | 1991 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1992 | status = nfserr_noent; |
1993 | goto out; | |
0733d213 AA |
1994 | } |
1995 | ||
a99454aa | 1996 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1997 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1998 | expire_client(unconf); |
0733d213 | 1999 | |
2dbb269d | 2000 | /* case 1 (normal case) */ |
0733d213 | 2001 | out_new: |
2216d449 | 2002 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 2003 | if (new == NULL) { |
4731030d | 2004 | status = nfserr_jukebox; |
0733d213 AA |
2005 | goto out; |
2006 | } | |
4f540e29 | 2007 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2008 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2009 | |
c212cecf | 2010 | gen_clid(new, nn); |
ac55fdc4 | 2011 | add_to_unconfirmed(new); |
0733d213 AA |
2012 | out_copy: |
2013 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2014 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2015 | ||
778df3f0 | 2016 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2017 | nfsd4_set_ex_flags(new, exid); |
2018 | ||
2019 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2020 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2021 | status = nfs_ok; |
2022 | ||
2023 | out: | |
2024 | nfs4_unlock_state(); | |
0733d213 | 2025 | return status; |
069b6ad4 AA |
2026 | } |
2027 | ||
57b7b43b | 2028 | static __be32 |
88e588d5 | 2029 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2030 | { |
88e588d5 AA |
2031 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2032 | slot_seqid); | |
b85d4c01 BH |
2033 | |
2034 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2035 | if (slot_inuse) { |
2036 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2037 | return nfserr_jukebox; |
2038 | else | |
2039 | return nfserr_seq_misordered; | |
2040 | } | |
f6d82485 | 2041 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2042 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2043 | return nfs_ok; |
88e588d5 | 2044 | if (seqid == slot_seqid) |
b85d4c01 | 2045 | return nfserr_replay_cache; |
b85d4c01 BH |
2046 | return nfserr_seq_misordered; |
2047 | } | |
2048 | ||
49557cc7 AA |
2049 | /* |
2050 | * Cache the create session result into the create session single DRC | |
2051 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2052 | * Do this for solo or embedded create session operations. | |
2053 | */ | |
2054 | static void | |
2055 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2056 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2057 | { |
2058 | slot->sl_status = nfserr; | |
2059 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2060 | } | |
2061 | ||
2062 | static __be32 | |
2063 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2064 | struct nfsd4_clid_slot *slot) | |
2065 | { | |
2066 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2067 | return slot->sl_status; | |
2068 | } | |
2069 | ||
1b74c25b MJ |
2070 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2071 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2072 | 1 + /* MIN tag is length with zero, only length */ \ | |
2073 | 3 + /* version, opcount, opcode */ \ | |
2074 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2075 | /* seqid, slotID, slotID, cache */ \ | |
2076 | 4 ) * sizeof(__be32)) | |
2077 | ||
2078 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2079 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2080 | 1 + /* status */ \ | |
2081 | 1 + /* MIN tag is length with zero, only length */ \ | |
2082 | 3 + /* opcount, opcode, opstatus*/ \ | |
2083 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2084 | /* seqid, slotID, slotID, slotID, status */ \ | |
2085 | 5 ) * sizeof(__be32)) | |
2086 | ||
55c760cf | 2087 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2088 | { |
55c760cf BF |
2089 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2090 | ||
373cd409 BF |
2091 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2092 | return nfserr_toosmall; | |
2093 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2094 | return nfserr_toosmall; | |
55c760cf BF |
2095 | ca->headerpadsz = 0; |
2096 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2097 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2098 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2099 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2100 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2101 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2102 | /* | |
2103 | * Note decreasing slot size below client's request may make it | |
2104 | * difficult for client to function correctly, whereas | |
2105 | * decreasing the number of slots will (just?) affect | |
2106 | * performance. When short on memory we therefore prefer to | |
2107 | * decrease number of slots instead of their size. Clients that | |
2108 | * request larger slots than they need will get poor results: | |
2109 | */ | |
2110 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2111 | if (!ca->maxreqs) | |
2112 | return nfserr_jukebox; | |
2113 | ||
373cd409 | 2114 | return nfs_ok; |
1b74c25b MJ |
2115 | } |
2116 | ||
8a891633 KM |
2117 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2118 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2119 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2120 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2121 | ||
06b332a5 | 2122 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2123 | { |
06b332a5 BF |
2124 | ca->headerpadsz = 0; |
2125 | ||
2126 | /* | |
2127 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2128 | * don't even do gss on the backchannel yet. But this is still | |
2129 | * less than 1k. Tighten up this estimate in the unlikely event | |
2130 | * it turns out to be a problem for some client: | |
2131 | */ | |
8a891633 | 2132 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2133 | return nfserr_toosmall; |
8a891633 | 2134 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2135 | return nfserr_toosmall; |
2136 | ca->maxresp_cached = 0; | |
2137 | if (ca->maxops < 2) | |
2138 | return nfserr_toosmall; | |
2139 | ||
2140 | return nfs_ok; | |
1b74c25b MJ |
2141 | } |
2142 | ||
b78724b7 BF |
2143 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2144 | { | |
2145 | switch (cbs->flavor) { | |
2146 | case RPC_AUTH_NULL: | |
2147 | case RPC_AUTH_UNIX: | |
2148 | return nfs_ok; | |
2149 | default: | |
2150 | /* | |
2151 | * GSS case: the spec doesn't allow us to return this | |
2152 | * error. But it also doesn't allow us not to support | |
2153 | * GSS. | |
2154 | * I'd rather this fail hard than return some error the | |
2155 | * client might think it can already handle: | |
2156 | */ | |
2157 | return nfserr_encr_alg_unsupp; | |
2158 | } | |
2159 | } | |
2160 | ||
069b6ad4 AA |
2161 | __be32 |
2162 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2163 | struct nfsd4_compound_state *cstate, | |
2164 | struct nfsd4_create_session *cr_ses) | |
2165 | { | |
363168b4 | 2166 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2167 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2168 | struct nfsd4_session *new; |
81f0b2a4 | 2169 | struct nfsd4_conn *conn; |
49557cc7 | 2170 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2171 | __be32 status = 0; |
8daae4dc | 2172 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2173 | |
a62573dc MJ |
2174 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2175 | return nfserr_inval; | |
b78724b7 BF |
2176 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2177 | if (status) | |
2178 | return status; | |
55c760cf | 2179 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2180 | if (status) |
2181 | return status; | |
2182 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2183 | if (status) |
f403e450 | 2184 | goto out_release_drc_mem; |
81f0b2a4 | 2185 | status = nfserr_jukebox; |
60810e54 | 2186 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2187 | if (!new) |
2188 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2189 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2190 | if (!conn) | |
2191 | goto out_free_session; | |
a62573dc | 2192 | |
ec6b5d7b | 2193 | nfs4_lock_state(); |
0a7ec377 | 2194 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2195 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2196 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2197 | |
2198 | if (conf) { | |
57266a6e BF |
2199 | status = nfserr_wrong_cred; |
2200 | if (!mach_creds_match(conf, rqstp)) | |
2201 | goto out_free_conn; | |
49557cc7 AA |
2202 | cs_slot = &conf->cl_cs_slot; |
2203 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2204 | if (status == nfserr_replay_cache) { |
49557cc7 | 2205 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2206 | goto out_free_conn; |
49557cc7 | 2207 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2208 | status = nfserr_seq_misordered; |
81f0b2a4 | 2209 | goto out_free_conn; |
ec6b5d7b | 2210 | } |
ec6b5d7b | 2211 | } else if (unconf) { |
8f9d3d3b | 2212 | struct nfs4_client *old; |
ec6b5d7b | 2213 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2214 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2215 | status = nfserr_clid_inuse; |
81f0b2a4 | 2216 | goto out_free_conn; |
ec6b5d7b | 2217 | } |
57266a6e BF |
2218 | status = nfserr_wrong_cred; |
2219 | if (!mach_creds_match(unconf, rqstp)) | |
2220 | goto out_free_conn; | |
49557cc7 AA |
2221 | cs_slot = &unconf->cl_cs_slot; |
2222 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2223 | if (status) { |
2224 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2225 | status = nfserr_seq_misordered; |
81f0b2a4 | 2226 | goto out_free_conn; |
ec6b5d7b | 2227 | } |
382a62e7 | 2228 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2229 | if (old) { |
2230 | status = mark_client_expired(old); | |
2231 | if (status) | |
2232 | goto out_free_conn; | |
8f9d3d3b | 2233 | expire_client(old); |
221a6876 | 2234 | } |
8f9d3d3b | 2235 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2236 | conf = unconf; |
2237 | } else { | |
2238 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2239 | goto out_free_conn; |
ec6b5d7b | 2240 | } |
81f0b2a4 | 2241 | status = nfs_ok; |
408b79bc BF |
2242 | /* |
2243 | * We do not support RDMA or persistent sessions | |
2244 | */ | |
2245 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2246 | cr_ses->flags &= ~SESSION4_RDMA; | |
2247 | ||
81f0b2a4 BF |
2248 | init_session(rqstp, new, conf, cr_ses); |
2249 | nfsd4_init_conn(rqstp, conn, new); | |
2250 | ||
ac7c46f2 | 2251 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2252 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2253 | cs_slot->sl_seqid++; |
49557cc7 | 2254 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2255 | |
49557cc7 AA |
2256 | /* cache solo and embedded create sessions under the state lock */ |
2257 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2258 | nfs4_unlock_state(); |
ec6b5d7b | 2259 | return status; |
81f0b2a4 | 2260 | out_free_conn: |
266533c6 | 2261 | nfs4_unlock_state(); |
81f0b2a4 BF |
2262 | free_conn(conn); |
2263 | out_free_session: | |
2264 | __free_session(new); | |
55c760cf BF |
2265 | out_release_drc_mem: |
2266 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2267 | return status; |
069b6ad4 AA |
2268 | } |
2269 | ||
1d1bc8f2 BF |
2270 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2271 | { | |
2272 | switch (*dir) { | |
2273 | case NFS4_CDFC4_FORE: | |
2274 | case NFS4_CDFC4_BACK: | |
2275 | return nfs_ok; | |
2276 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2277 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2278 | *dir = NFS4_CDFC4_BOTH; | |
2279 | return nfs_ok; | |
2280 | }; | |
2281 | return nfserr_inval; | |
2282 | } | |
2283 | ||
cb73a9f4 BF |
2284 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2285 | { | |
2286 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2287 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2288 | __be32 status; |
cb73a9f4 | 2289 | |
b78724b7 BF |
2290 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2291 | if (status) | |
2292 | return status; | |
c9a49628 | 2293 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2294 | session->se_cb_prog = bc->bc_cb_program; |
2295 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2296 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2297 | |
2298 | nfsd4_probe_callback(session->se_client); | |
2299 | ||
2300 | return nfs_ok; | |
2301 | } | |
2302 | ||
1d1bc8f2 BF |
2303 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2304 | struct nfsd4_compound_state *cstate, | |
2305 | struct nfsd4_bind_conn_to_session *bcts) | |
2306 | { | |
2307 | __be32 status; | |
3ba63671 | 2308 | struct nfsd4_conn *conn; |
4f6e6c17 | 2309 | struct nfsd4_session *session; |
d4e19e70 TM |
2310 | struct net *net = SVC_NET(rqstp); |
2311 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2312 | |
2313 | if (!nfsd4_last_compound_op(rqstp)) | |
2314 | return nfserr_not_only_op; | |
4f6e6c17 | 2315 | nfs4_lock_state(); |
c9a49628 | 2316 | spin_lock(&nn->client_lock); |
d4e19e70 | 2317 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2318 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2319 | if (!session) |
d4e19e70 | 2320 | goto out_no_session; |
57266a6e BF |
2321 | status = nfserr_wrong_cred; |
2322 | if (!mach_creds_match(session->se_client, rqstp)) | |
2323 | goto out; | |
1d1bc8f2 | 2324 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2325 | if (status) |
4f6e6c17 | 2326 | goto out; |
3ba63671 | 2327 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2328 | status = nfserr_jukebox; |
3ba63671 | 2329 | if (!conn) |
4f6e6c17 BF |
2330 | goto out; |
2331 | nfsd4_init_conn(rqstp, conn, session); | |
2332 | status = nfs_ok; | |
2333 | out: | |
d4e19e70 TM |
2334 | nfsd4_put_session(session); |
2335 | out_no_session: | |
4f6e6c17 BF |
2336 | nfs4_unlock_state(); |
2337 | return status; | |
1d1bc8f2 BF |
2338 | } |
2339 | ||
5d4cec2f BF |
2340 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2341 | { | |
2342 | if (!session) | |
2343 | return 0; | |
2344 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2345 | } | |
2346 | ||
069b6ad4 AA |
2347 | __be32 |
2348 | nfsd4_destroy_session(struct svc_rqst *r, | |
2349 | struct nfsd4_compound_state *cstate, | |
2350 | struct nfsd4_destroy_session *sessionid) | |
2351 | { | |
e10e0cfc | 2352 | struct nfsd4_session *ses; |
abcdff09 | 2353 | __be32 status; |
f0f51f5c | 2354 | int ref_held_by_me = 0; |
d4e19e70 TM |
2355 | struct net *net = SVC_NET(r); |
2356 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2357 | |
abcdff09 BF |
2358 | nfs4_lock_state(); |
2359 | status = nfserr_not_only_op; | |
5d4cec2f | 2360 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2361 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2362 | goto out; |
f0f51f5c | 2363 | ref_held_by_me++; |
57716355 | 2364 | } |
e10e0cfc | 2365 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2366 | spin_lock(&nn->client_lock); |
d4e19e70 | 2367 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2368 | if (!ses) |
2369 | goto out_client_lock; | |
57266a6e BF |
2370 | status = nfserr_wrong_cred; |
2371 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2372 | goto out_put_session; |
f0f51f5c | 2373 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2374 | if (status) |
f0f51f5c | 2375 | goto out_put_session; |
e10e0cfc | 2376 | unhash_session(ses); |
c9a49628 | 2377 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2378 | |
84f5f7cc | 2379 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2380 | |
c9a49628 | 2381 | spin_lock(&nn->client_lock); |
e10e0cfc | 2382 | status = nfs_ok; |
f0f51f5c | 2383 | out_put_session: |
d4e19e70 | 2384 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2385 | out_client_lock: |
2386 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2387 | out: |
abcdff09 | 2388 | nfs4_unlock_state(); |
e10e0cfc | 2389 | return status; |
069b6ad4 AA |
2390 | } |
2391 | ||
a663bdd8 | 2392 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2393 | { |
2394 | struct nfsd4_conn *c; | |
2395 | ||
2396 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2397 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2398 | return c; |
2399 | } | |
2400 | } | |
2401 | return NULL; | |
2402 | } | |
2403 | ||
57266a6e | 2404 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2405 | { |
2406 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2407 | struct nfsd4_conn *c; |
57266a6e | 2408 | __be32 status = nfs_ok; |
21b75b01 | 2409 | int ret; |
328ead28 BF |
2410 | |
2411 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2412 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2413 | if (c) |
2414 | goto out_free; | |
2415 | status = nfserr_conn_not_bound_to_session; | |
2416 | if (clp->cl_mach_cred) | |
2417 | goto out_free; | |
328ead28 BF |
2418 | __nfsd4_hash_conn(new, ses); |
2419 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2420 | ret = nfsd4_register_conn(new); |
2421 | if (ret) | |
2422 | /* oops; xprt is already down: */ | |
2423 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2424 | return nfs_ok; |
2425 | out_free: | |
2426 | spin_unlock(&clp->cl_lock); | |
2427 | free_conn(new); | |
2428 | return status; | |
328ead28 BF |
2429 | } |
2430 | ||
868b89c3 MJ |
2431 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2432 | { | |
2433 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2434 | ||
2435 | return args->opcnt > session->se_fchannel.maxops; | |
2436 | } | |
2437 | ||
ae82a8d0 MJ |
2438 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2439 | struct nfsd4_session *session) | |
2440 | { | |
2441 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2442 | ||
2443 | return xb->len > session->se_fchannel.maxreq_sz; | |
2444 | } | |
2445 | ||
069b6ad4 | 2446 | __be32 |
b85d4c01 | 2447 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2448 | struct nfsd4_compound_state *cstate, |
2449 | struct nfsd4_sequence *seq) | |
2450 | { | |
f9bb94c4 | 2451 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2452 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2453 | struct nfsd4_session *session; |
221a6876 | 2454 | struct nfs4_client *clp; |
b85d4c01 | 2455 | struct nfsd4_slot *slot; |
a663bdd8 | 2456 | struct nfsd4_conn *conn; |
57b7b43b | 2457 | __be32 status; |
47ee5298 | 2458 | int buflen; |
d4e19e70 TM |
2459 | struct net *net = SVC_NET(rqstp); |
2460 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2461 | |
f9bb94c4 AA |
2462 | if (resp->opcnt != 1) |
2463 | return nfserr_sequence_pos; | |
2464 | ||
a663bdd8 BF |
2465 | /* |
2466 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2467 | * below. | |
2468 | */ | |
2469 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2470 | if (!conn) | |
2471 | return nfserr_jukebox; | |
2472 | ||
c9a49628 | 2473 | spin_lock(&nn->client_lock); |
d4e19e70 | 2474 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2475 | if (!session) |
221a6876 BF |
2476 | goto out_no_session; |
2477 | clp = session->se_client; | |
b85d4c01 | 2478 | |
868b89c3 MJ |
2479 | status = nfserr_too_many_ops; |
2480 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2481 | goto out_put_session; |
868b89c3 | 2482 | |
ae82a8d0 MJ |
2483 | status = nfserr_req_too_big; |
2484 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2485 | goto out_put_session; |
ae82a8d0 | 2486 | |
b85d4c01 | 2487 | status = nfserr_badslot; |
6c18ba9f | 2488 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2489 | goto out_put_session; |
b85d4c01 | 2490 | |
557ce264 | 2491 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2492 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2493 | ||
a8dfdaeb AA |
2494 | /* We do not negotiate the number of slots yet, so set the |
2495 | * maxslots to the session maxreqs which is used to encode | |
2496 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2497 | seq->maxslots = session->se_fchannel.maxreqs; | |
2498 | ||
73e79482 BF |
2499 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2500 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2501 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2502 | status = nfserr_seq_misordered; |
2503 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2504 | goto out_put_session; |
b85d4c01 BH |
2505 | cstate->slot = slot; |
2506 | cstate->session = session; | |
4b24ca7d | 2507 | cstate->clp = clp; |
da3846a2 | 2508 | /* Return the cached reply status and set cstate->status |
557ce264 | 2509 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2510 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2511 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2512 | goto out; |
b85d4c01 BH |
2513 | } |
2514 | if (status) | |
66b2b9b2 | 2515 | goto out_put_session; |
b85d4c01 | 2516 | |
57266a6e | 2517 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2518 | conn = NULL; |
57266a6e BF |
2519 | if (status) |
2520 | goto out_put_session; | |
328ead28 | 2521 | |
47ee5298 BF |
2522 | buflen = (seq->cachethis) ? |
2523 | session->se_fchannel.maxresp_cached : | |
2524 | session->se_fchannel.maxresp_sz; | |
2525 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2526 | nfserr_rep_too_big; | |
a5cddc88 | 2527 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2528 | goto out_put_session; |
32aaa62e | 2529 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2530 | |
2531 | status = nfs_ok; | |
b85d4c01 | 2532 | /* Success! bump slot seqid */ |
b85d4c01 | 2533 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2534 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2535 | if (seq->cachethis) |
2536 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2537 | else |
2538 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2539 | |
2540 | cstate->slot = slot; | |
2541 | cstate->session = session; | |
4b24ca7d | 2542 | cstate->clp = clp; |
b85d4c01 | 2543 | |
b85d4c01 | 2544 | out: |
221a6876 BF |
2545 | switch (clp->cl_cb_state) { |
2546 | case NFSD4_CB_DOWN: | |
2547 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2548 | break; | |
2549 | case NFSD4_CB_FAULT: | |
2550 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2551 | break; | |
2552 | default: | |
2553 | seq->status_flags = 0; | |
aaf84eb9 | 2554 | } |
3bd64a5b BF |
2555 | if (!list_empty(&clp->cl_revoked)) |
2556 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2557 | out_no_session: |
3f42d2c4 KM |
2558 | if (conn) |
2559 | free_conn(conn); | |
c9a49628 | 2560 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2561 | return status; |
66b2b9b2 | 2562 | out_put_session: |
d4e19e70 | 2563 | nfsd4_put_session_locked(session); |
221a6876 | 2564 | goto out_no_session; |
069b6ad4 AA |
2565 | } |
2566 | ||
b607664e TM |
2567 | void |
2568 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2569 | { | |
2570 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2571 | ||
2572 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2573 | if (cs->status != nfserr_replay_cache) { |
2574 | nfsd4_store_cache_entry(resp); | |
2575 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2576 | } | |
d4e19e70 | 2577 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2578 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2579 | } else if (cs->clp) |
2580 | put_client_renew(cs->clp); | |
b607664e TM |
2581 | } |
2582 | ||
345c2842 MJ |
2583 | __be32 |
2584 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2585 | { | |
2586 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2587 | __be32 status = 0; |
8daae4dc | 2588 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2589 | |
2590 | nfs4_lock_state(); | |
0a7ec377 | 2591 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2592 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2593 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2594 | |
2595 | if (conf) { | |
2596 | clp = conf; | |
2597 | ||
c0293b01 | 2598 | if (client_has_state(conf)) { |
345c2842 MJ |
2599 | status = nfserr_clientid_busy; |
2600 | goto out; | |
2601 | } | |
2602 | } else if (unconf) | |
2603 | clp = unconf; | |
2604 | else { | |
2605 | status = nfserr_stale_clientid; | |
2606 | goto out; | |
2607 | } | |
57266a6e BF |
2608 | if (!mach_creds_match(clp, rqstp)) { |
2609 | status = nfserr_wrong_cred; | |
2610 | goto out; | |
2611 | } | |
345c2842 MJ |
2612 | expire_client(clp); |
2613 | out: | |
2614 | nfs4_unlock_state(); | |
345c2842 MJ |
2615 | return status; |
2616 | } | |
2617 | ||
4dc6ec00 BF |
2618 | __be32 |
2619 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2620 | { | |
57b7b43b | 2621 | __be32 status = 0; |
bcecf1cc | 2622 | |
4dc6ec00 BF |
2623 | if (rc->rca_one_fs) { |
2624 | if (!cstate->current_fh.fh_dentry) | |
2625 | return nfserr_nofilehandle; | |
2626 | /* | |
2627 | * We don't take advantage of the rca_one_fs case. | |
2628 | * That's OK, it's optional, we can safely ignore it. | |
2629 | */ | |
2630 | return nfs_ok; | |
2631 | } | |
bcecf1cc | 2632 | |
4dc6ec00 | 2633 | nfs4_lock_state(); |
bcecf1cc | 2634 | status = nfserr_complete_already; |
a52d726b JL |
2635 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2636 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2637 | goto out; |
2638 | ||
2639 | status = nfserr_stale_clientid; | |
2640 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2641 | /* |
2642 | * The following error isn't really legal. | |
2643 | * But we only get here if the client just explicitly | |
2644 | * destroyed the client. Surely it no longer cares what | |
2645 | * error it gets back on an operation for the dead | |
2646 | * client. | |
2647 | */ | |
bcecf1cc MJ |
2648 | goto out; |
2649 | ||
2650 | status = nfs_ok; | |
2a4317c5 | 2651 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2652 | out: |
4dc6ec00 | 2653 | nfs4_unlock_state(); |
bcecf1cc | 2654 | return status; |
4dc6ec00 BF |
2655 | } |
2656 | ||
b37ad28b | 2657 | __be32 |
b591480b BF |
2658 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2659 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2660 | { |
a084daf5 | 2661 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2662 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2663 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2664 | __be32 status; |
c212cecf SK |
2665 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2666 | ||
63db4632 | 2667 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2668 | nfs4_lock_state(); |
382a62e7 | 2669 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2670 | if (conf) { |
63db4632 | 2671 | /* case 0: */ |
1da177e4 | 2672 | status = nfserr_clid_inuse; |
e203d506 BF |
2673 | if (clp_used_exchangeid(conf)) |
2674 | goto out; | |
026722c2 | 2675 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2676 | char addr_str[INET6_ADDRSTRLEN]; |
2677 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2678 | sizeof(addr_str)); | |
2679 | dprintk("NFSD: setclientid: string in use by client " | |
2680 | "at %s\n", addr_str); | |
1da177e4 LT |
2681 | goto out; |
2682 | } | |
1da177e4 | 2683 | } |
a99454aa | 2684 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2685 | if (unconf) |
2686 | expire_client(unconf); | |
3e772463 | 2687 | status = nfserr_jukebox; |
2216d449 | 2688 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2689 | if (new == NULL) |
2690 | goto out; | |
34b232bb | 2691 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2692 | /* case 1: probable callback update */ |
1da177e4 | 2693 | copy_clid(new, conf); |
34b232bb | 2694 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2695 | gen_clid(new, nn); |
8323c3b2 | 2696 | new->cl_minorversion = 0; |
6f3d772f | 2697 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2698 | add_to_unconfirmed(new); |
1da177e4 LT |
2699 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2700 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2701 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2702 | status = nfs_ok; | |
2703 | out: | |
2704 | nfs4_unlock_state(); | |
2705 | return status; | |
2706 | } | |
2707 | ||
2708 | ||
b37ad28b | 2709 | __be32 |
b591480b BF |
2710 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2711 | struct nfsd4_compound_state *cstate, | |
2712 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2713 | { |
21ab45a4 | 2714 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2715 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2716 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2717 | __be32 status; |
7f2210fa | 2718 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2719 | |
2c142baa | 2720 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2721 | return nfserr_stale_clientid; |
1da177e4 | 2722 | nfs4_lock_state(); |
21ab45a4 | 2723 | |
8daae4dc | 2724 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2725 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2726 | /* |
8695b90a BF |
2727 | * We try hard to give out unique clientid's, so if we get an |
2728 | * attempt to confirm the same clientid with a different cred, | |
2729 | * there's a bug somewhere. Let's charitably assume it's our | |
2730 | * bug. | |
a186e767 | 2731 | */ |
8695b90a BF |
2732 | status = nfserr_serverfault; |
2733 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2734 | goto out; | |
2735 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2736 | goto out; | |
63db4632 | 2737 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2738 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2739 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2740 | status = nfs_ok; |
90d700b7 BF |
2741 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2742 | status = nfserr_stale_clientid; | |
2743 | goto out; | |
2744 | } | |
2745 | status = nfs_ok; | |
2746 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2747 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2748 | nfsd4_probe_callback(conf); | |
2749 | expire_client(unconf); | |
90d700b7 | 2750 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2751 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2752 | if (conf) { |
2753 | status = mark_client_expired(conf); | |
2754 | if (status) | |
2755 | goto out; | |
8695b90a | 2756 | expire_client(conf); |
221a6876 | 2757 | } |
8695b90a | 2758 | move_to_confirmed(unconf); |
f3d03b92 | 2759 | nfsd4_probe_callback(unconf); |
08e8987c | 2760 | } |
1da177e4 | 2761 | out: |
1da177e4 LT |
2762 | nfs4_unlock_state(); |
2763 | return status; | |
2764 | } | |
2765 | ||
32513b40 BF |
2766 | static struct nfs4_file *nfsd4_alloc_file(void) |
2767 | { | |
2768 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2769 | } | |
2770 | ||
1da177e4 | 2771 | /* OPEN Share state helper functions */ |
32513b40 | 2772 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2773 | { |
1da177e4 LT |
2774 | unsigned int hashval = file_hashval(ino); |
2775 | ||
950e0118 TM |
2776 | lockdep_assert_held(&state_lock); |
2777 | ||
32513b40 | 2778 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2779 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2780 | INIT_LIST_HEAD(&fp->fi_stateids); |
2781 | INIT_LIST_HEAD(&fp->fi_delegations); | |
950e0118 TM |
2782 | ihold(ino); |
2783 | fp->fi_inode = ino; | |
32513b40 BF |
2784 | fp->fi_had_conflict = false; |
2785 | fp->fi_lease = NULL; | |
2786 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2787 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2788 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2789 | } |
2790 | ||
e8ff2a84 | 2791 | void |
1da177e4 LT |
2792 | nfsd4_free_slabs(void) |
2793 | { | |
abf1135b CH |
2794 | kmem_cache_destroy(openowner_slab); |
2795 | kmem_cache_destroy(lockowner_slab); | |
2796 | kmem_cache_destroy(file_slab); | |
2797 | kmem_cache_destroy(stateid_slab); | |
2798 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2799 | } |
1da177e4 | 2800 | |
72083396 | 2801 | int |
e60d4398 N |
2802 | nfsd4_init_slabs(void) |
2803 | { | |
fe0750e5 BF |
2804 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2805 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2806 | if (openowner_slab == NULL) | |
abf1135b | 2807 | goto out; |
fe0750e5 | 2808 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2809 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2810 | if (lockowner_slab == NULL) |
abf1135b | 2811 | goto out_free_openowner_slab; |
e60d4398 | 2812 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2813 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2814 | if (file_slab == NULL) |
abf1135b | 2815 | goto out_free_lockowner_slab; |
5ac049ac | 2816 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2817 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2818 | if (stateid_slab == NULL) |
abf1135b | 2819 | goto out_free_file_slab; |
5b2d21c1 | 2820 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2821 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2822 | if (deleg_slab == NULL) |
abf1135b | 2823 | goto out_free_stateid_slab; |
e60d4398 | 2824 | return 0; |
abf1135b CH |
2825 | |
2826 | out_free_stateid_slab: | |
2827 | kmem_cache_destroy(stateid_slab); | |
2828 | out_free_file_slab: | |
2829 | kmem_cache_destroy(file_slab); | |
2830 | out_free_lockowner_slab: | |
2831 | kmem_cache_destroy(lockowner_slab); | |
2832 | out_free_openowner_slab: | |
2833 | kmem_cache_destroy(openowner_slab); | |
2834 | out: | |
e60d4398 N |
2835 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2836 | return -ENOMEM; | |
1da177e4 LT |
2837 | } |
2838 | ||
ff194bd9 | 2839 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2840 | { |
ff194bd9 BF |
2841 | rp->rp_status = nfserr_serverfault; |
2842 | rp->rp_buflen = 0; | |
2843 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2844 | } |
2845 | ||
fe0750e5 | 2846 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2847 | { |
1da177e4 | 2848 | struct nfs4_stateowner *sop; |
1da177e4 | 2849 | |
fe0750e5 | 2850 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2851 | if (!sop) |
2852 | return NULL; | |
2853 | ||
2854 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2855 | if (!sop->so_owner.data) { | |
fe0750e5 | 2856 | kmem_cache_free(slab, sop); |
1da177e4 | 2857 | return NULL; |
ff194bd9 BF |
2858 | } |
2859 | sop->so_owner.len = owner->len; | |
2860 | ||
ea1da636 | 2861 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2862 | sop->so_client = clp; |
2863 | init_nfs4_replay(&sop->so_replay); | |
2864 | return sop; | |
2865 | } | |
2866 | ||
fe0750e5 | 2867 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2868 | { |
9b531137 SK |
2869 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2870 | ||
2871 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2872 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2873 | } |
2874 | ||
fe0750e5 | 2875 | static struct nfs4_openowner * |
13d6f66b | 2876 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
2877 | struct nfsd4_compound_state *cstate) |
2878 | { | |
13d6f66b | 2879 | struct nfs4_client *clp = cstate->clp; |
fe0750e5 | 2880 | struct nfs4_openowner *oo; |
ff194bd9 | 2881 | |
fe0750e5 BF |
2882 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2883 | if (!oo) | |
ff194bd9 | 2884 | return NULL; |
fe0750e5 BF |
2885 | oo->oo_owner.so_is_open_owner = 1; |
2886 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2887 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2888 | if (nfsd4_has_session(cstate)) |
2889 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2890 | oo->oo_time = 0; |
38c387b5 | 2891 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2892 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2893 | hash_openowner(oo, clp, strhashval); | |
2894 | return oo; | |
1da177e4 LT |
2895 | } |
2896 | ||
996e0938 | 2897 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2898 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2899 | |
3abdb607 | 2900 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 2901 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 2902 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
fe0750e5 | 2903 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2904 | get_nfs4_file(fp); |
1da177e4 | 2905 | stp->st_file = fp; |
1da177e4 LT |
2906 | stp->st_access_bmap = 0; |
2907 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2908 | set_access(open->op_share_access, stp); |
ce0fc43c | 2909 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2910 | stp->st_openstp = NULL; |
1d31a253 TM |
2911 | spin_lock(&fp->fi_lock); |
2912 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
2913 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
2914 | } |
2915 | ||
fd39ca9a | 2916 | static void |
73758fed | 2917 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2918 | { |
73758fed SK |
2919 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2920 | ||
fe0750e5 | 2921 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2922 | |
73758fed | 2923 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2924 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2925 | } |
2926 | ||
1da177e4 | 2927 | static int |
599e0a22 BF |
2928 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2929 | clientid_t *clid) | |
2930 | { | |
2931 | return (sop->so_owner.len == owner->len) && | |
2932 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2933 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2934 | } |
2935 | ||
fe0750e5 | 2936 | static struct nfs4_openowner * |
9b531137 SK |
2937 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2938 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2939 | { |
a50d2ad1 BF |
2940 | struct nfs4_stateowner *so; |
2941 | struct nfs4_openowner *oo; | |
d15c077e | 2942 | struct nfs4_client *clp; |
1da177e4 | 2943 | |
9b531137 | 2944 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2945 | if (!so->so_is_open_owner) |
2946 | continue; | |
a50d2ad1 BF |
2947 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2948 | oo = openowner(so); | |
d15c077e BF |
2949 | clp = oo->oo_owner.so_client; |
2950 | if ((bool)clp->cl_minorversion != sessions) | |
2951 | return NULL; | |
a50d2ad1 BF |
2952 | renew_client(oo->oo_owner.so_client); |
2953 | return oo; | |
2954 | } | |
1da177e4 LT |
2955 | } |
2956 | return NULL; | |
2957 | } | |
2958 | ||
2959 | /* search file_hashtbl[] for file */ | |
2960 | static struct nfs4_file * | |
950e0118 | 2961 | find_file_locked(struct inode *ino) |
1da177e4 LT |
2962 | { |
2963 | unsigned int hashval = file_hashval(ino); | |
2964 | struct nfs4_file *fp; | |
2965 | ||
950e0118 TM |
2966 | lockdep_assert_held(&state_lock); |
2967 | ||
89876f8c | 2968 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2969 | if (fp->fi_inode == ino) { |
2970 | get_nfs4_file(fp); | |
1da177e4 | 2971 | return fp; |
13cd2184 | 2972 | } |
1da177e4 LT |
2973 | } |
2974 | return NULL; | |
2975 | } | |
2976 | ||
950e0118 TM |
2977 | static struct nfs4_file * |
2978 | find_file(struct inode *ino) | |
2979 | { | |
2980 | struct nfs4_file *fp; | |
2981 | ||
2982 | spin_lock(&state_lock); | |
2983 | fp = find_file_locked(ino); | |
2984 | spin_unlock(&state_lock); | |
2985 | return fp; | |
2986 | } | |
2987 | ||
2988 | static struct nfs4_file * | |
2989 | find_or_add_file(struct inode *ino, struct nfs4_file *new) | |
2990 | { | |
2991 | struct nfs4_file *fp; | |
2992 | ||
2993 | spin_lock(&state_lock); | |
2994 | fp = find_file_locked(ino); | |
2995 | if (fp == NULL) { | |
2996 | nfsd4_init_file(new, ino); | |
2997 | fp = new; | |
2998 | } | |
2999 | spin_unlock(&state_lock); | |
3000 | ||
3001 | return fp; | |
3002 | } | |
3003 | ||
1da177e4 LT |
3004 | /* |
3005 | * Called to check deny when READ with all zero stateid or | |
3006 | * WRITE with all zero or all one stateid | |
3007 | */ | |
b37ad28b | 3008 | static __be32 |
1da177e4 LT |
3009 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3010 | { | |
3011 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
3012 | struct nfs4_file *fp; | |
dcef0413 | 3013 | struct nfs4_ol_stateid *stp; |
b37ad28b | 3014 | __be32 ret; |
1da177e4 | 3015 | |
1da177e4 | 3016 | fp = find_file(ino); |
13cd2184 N |
3017 | if (!fp) |
3018 | return nfs_ok; | |
b700949b | 3019 | ret = nfserr_locked; |
1da177e4 | 3020 | /* Search for conflicting share reservations */ |
1d31a253 | 3021 | spin_lock(&fp->fi_lock); |
13cd2184 | 3022 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
3023 | if (test_deny(deny_type, stp) || |
3024 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 3025 | goto out; |
1da177e4 | 3026 | } |
13cd2184 N |
3027 | ret = nfs_ok; |
3028 | out: | |
1d31a253 | 3029 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3030 | put_nfs4_file(fp); |
3031 | return ret; | |
1da177e4 LT |
3032 | } |
3033 | ||
6b57d9c8 | 3034 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 3035 | { |
e8c69d17 BF |
3036 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
3037 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
3038 | ||
cdc97505 | 3039 | lockdep_assert_held(&state_lock); |
1da177e4 LT |
3040 | /* We're assuming the state code never drops its reference |
3041 | * without first removing the lease. Since we're in this lease | |
3042 | * callback (and since the lease code is serialized by the kernel | |
3043 | * lock) we know the server hasn't removed the lease yet, we know | |
3044 | * it's safe to take a reference: */ | |
3045 | atomic_inc(&dp->dl_count); | |
3046 | ||
dff1399f JL |
3047 | /* |
3048 | * If the dl_time != 0, then we know that it has already been | |
3049 | * queued for a lease break. Don't queue it again. | |
3050 | */ | |
3051 | if (dp->dl_time == 0) { | |
3052 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); | |
3053 | dp->dl_time = get_seconds(); | |
3054 | } | |
1da177e4 | 3055 | |
6282cd56 N |
3056 | block_delegations(&dp->dl_fh); |
3057 | ||
6b57d9c8 BF |
3058 | nfsd4_cb_recall(dp); |
3059 | } | |
3060 | ||
1c8c601a | 3061 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3062 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3063 | { | |
acfdf5c3 BF |
3064 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3065 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3066 | |
7fa10cd1 BF |
3067 | if (!fp) { |
3068 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3069 | return; | |
3070 | } | |
3071 | if (fp->fi_had_conflict) { | |
3072 | WARN(1, "duplicate break on %p\n", fp); | |
3073 | return; | |
3074 | } | |
0272e1fd BF |
3075 | /* |
3076 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3077 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3078 | * in time: |
0272e1fd BF |
3079 | */ |
3080 | fl->fl_break_time = 0; | |
1da177e4 | 3081 | |
cdc97505 | 3082 | spin_lock(&state_lock); |
acfdf5c3 BF |
3083 | fp->fi_had_conflict = true; |
3084 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3085 | nfsd_break_one_deleg(dp); | |
cdc97505 | 3086 | spin_unlock(&state_lock); |
1da177e4 LT |
3087 | } |
3088 | ||
1da177e4 LT |
3089 | static |
3090 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3091 | { | |
3092 | if (arg & F_UNLCK) | |
3093 | return lease_modify(onlist, arg); | |
3094 | else | |
3095 | return -EAGAIN; | |
3096 | } | |
3097 | ||
7b021967 | 3098 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3099 | .lm_break = nfsd_break_deleg_cb, |
3100 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3101 | }; |
3102 | ||
7a8711c9 BF |
3103 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3104 | { | |
3105 | if (nfsd4_has_session(cstate)) | |
3106 | return nfs_ok; | |
3107 | if (seqid == so->so_seqid - 1) | |
3108 | return nfserr_replay_me; | |
3109 | if (seqid == so->so_seqid) | |
3110 | return nfs_ok; | |
3111 | return nfserr_bad_seqid; | |
3112 | } | |
1da177e4 | 3113 | |
4b24ca7d JL |
3114 | static __be32 lookup_clientid(clientid_t *clid, |
3115 | struct nfsd4_compound_state *cstate, | |
3116 | struct nfsd_net *nn) | |
3117 | { | |
3118 | struct nfs4_client *found; | |
3119 | ||
3120 | if (cstate->clp) { | |
3121 | found = cstate->clp; | |
3122 | if (!same_clid(&found->cl_clientid, clid)) | |
3123 | return nfserr_stale_clientid; | |
3124 | return nfs_ok; | |
3125 | } | |
3126 | ||
3127 | if (STALE_CLIENTID(clid, nn)) | |
3128 | return nfserr_stale_clientid; | |
3129 | ||
3130 | /* | |
3131 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3132 | * cached already then we know this is for is for v4.0 and "sessions" | |
3133 | * will be false. | |
3134 | */ | |
3135 | WARN_ON_ONCE(cstate->session); | |
3136 | found = find_confirmed_client(clid, false, nn); | |
3137 | if (!found) | |
3138 | return nfserr_expired; | |
3139 | ||
3140 | /* Cache the nfs4_client in cstate! */ | |
3141 | cstate->clp = found; | |
3142 | atomic_inc(&found->cl_refcount); | |
3143 | return nfs_ok; | |
3144 | } | |
3145 | ||
b37ad28b | 3146 | __be32 |
6668958f | 3147 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3148 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3149 | { |
1da177e4 LT |
3150 | clientid_t *clientid = &open->op_clientid; |
3151 | struct nfs4_client *clp = NULL; | |
3152 | unsigned int strhashval; | |
fe0750e5 | 3153 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3154 | __be32 status; |
1da177e4 | 3155 | |
2c142baa | 3156 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3157 | return nfserr_stale_clientid; |
32513b40 BF |
3158 | /* |
3159 | * In case we need it later, after we've already created the | |
3160 | * file and don't want to risk a further failure: | |
3161 | */ | |
3162 | open->op_file = nfsd4_alloc_file(); | |
3163 | if (open->op_file == NULL) | |
3164 | return nfserr_jukebox; | |
1da177e4 | 3165 | |
2d91e895 TM |
3166 | status = lookup_clientid(clientid, cstate, nn); |
3167 | if (status) | |
3168 | return status; | |
3169 | clp = cstate->clp; | |
3170 | ||
16bfdaaf | 3171 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3172 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3173 | open->op_openowner = oo; |
3174 | if (!oo) { | |
bcf130f9 | 3175 | goto new_owner; |
1da177e4 | 3176 | } |
dad1c067 | 3177 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3178 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3179 | release_openowner(oo); |
3180 | open->op_openowner = NULL; | |
bcf130f9 | 3181 | goto new_owner; |
0f442aa2 | 3182 | } |
4cdc951b BF |
3183 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3184 | if (status) | |
3185 | return status; | |
4cdc951b | 3186 | goto alloc_stateid; |
bcf130f9 | 3187 | new_owner: |
13d6f66b | 3188 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3189 | if (oo == NULL) |
3190 | return nfserr_jukebox; | |
3191 | open->op_openowner = oo; | |
4cdc951b BF |
3192 | alloc_stateid: |
3193 | open->op_stp = nfs4_alloc_stateid(clp); | |
3194 | if (!open->op_stp) | |
3195 | return nfserr_jukebox; | |
0f442aa2 | 3196 | return nfs_ok; |
1da177e4 LT |
3197 | } |
3198 | ||
b37ad28b | 3199 | static inline __be32 |
4a6e43e6 N |
3200 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3201 | { | |
3202 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3203 | return nfserr_openmode; | |
3204 | else | |
3205 | return nfs_ok; | |
3206 | } | |
3207 | ||
f459e453 | 3208 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3209 | { |
f459e453 | 3210 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3211 | } |
3212 | ||
38c2f4b1 | 3213 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3214 | { |
f459e453 | 3215 | struct nfs4_stid *ret; |
24a0111e | 3216 | |
38c2f4b1 | 3217 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3218 | if (!ret) |
3219 | return NULL; | |
3220 | return delegstateid(ret); | |
24a0111e BF |
3221 | } |
3222 | ||
8b289b2c BF |
3223 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3224 | { | |
3225 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3226 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3227 | } | |
3228 | ||
b37ad28b | 3229 | static __be32 |
41d22663 | 3230 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3231 | struct nfs4_delegation **dp) |
3232 | { | |
3233 | int flags; | |
b37ad28b | 3234 | __be32 status = nfserr_bad_stateid; |
567d9829 | 3235 | |
38c2f4b1 | 3236 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 3237 | if (*dp == NULL) |
c44c5eeb | 3238 | goto out; |
24a0111e | 3239 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3240 | status = nfs4_check_delegmode(*dp, flags); |
3241 | if (status) | |
3242 | *dp = NULL; | |
c44c5eeb | 3243 | out: |
8b289b2c | 3244 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3245 | return nfs_ok; |
3246 | if (status) | |
3247 | return status; | |
dad1c067 | 3248 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3249 | return nfs_ok; |
567d9829 N |
3250 | } |
3251 | ||
b37ad28b | 3252 | static __be32 |
dcef0413 | 3253 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 3254 | { |
dcef0413 | 3255 | struct nfs4_ol_stateid *local; |
fe0750e5 | 3256 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3257 | |
1d31a253 | 3258 | spin_lock(&fp->fi_lock); |
8beefa24 | 3259 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3260 | /* ignore lock owners */ |
3261 | if (local->st_stateowner->so_is_open_owner == 0) | |
3262 | continue; | |
3263 | /* remember if we have seen this open owner */ | |
fe0750e5 | 3264 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
3265 | *stpp = local; |
3266 | /* check for conflicting share reservations */ | |
1d31a253 TM |
3267 | if (!test_share(local, open)) { |
3268 | spin_unlock(&fp->fi_lock); | |
77eaae8d | 3269 | return nfserr_share_denied; |
1d31a253 | 3270 | } |
1da177e4 | 3271 | } |
1d31a253 | 3272 | spin_unlock(&fp->fi_lock); |
77eaae8d | 3273 | return nfs_ok; |
1da177e4 LT |
3274 | } |
3275 | ||
21fb4016 BF |
3276 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3277 | { | |
3278 | int flags = 0; | |
3279 | ||
3280 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3281 | flags |= NFSD_MAY_READ; | |
3282 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3283 | flags |= NFSD_MAY_WRITE; | |
3284 | return flags; | |
3285 | } | |
3286 | ||
7e6a72e5 CH |
3287 | static inline __be32 |
3288 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3289 | struct nfsd4_open *open) | |
3290 | { | |
3291 | struct iattr iattr = { | |
3292 | .ia_valid = ATTR_SIZE, | |
3293 | .ia_size = 0, | |
3294 | }; | |
3295 | if (!open->op_truncate) | |
3296 | return 0; | |
3297 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3298 | return nfserr_inval; | |
3299 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3300 | } | |
3301 | ||
0c12eaff CB |
3302 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
3303 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f | 3304 | { |
de18643d | 3305 | struct file *filp = NULL; |
f9d7562f | 3306 | __be32 status; |
0c12eaff CB |
3307 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3308 | int access = nfs4_access_to_access(open->op_share_access); | |
3309 | ||
de18643d | 3310 | spin_lock(&fp->fi_lock); |
f9d7562f | 3311 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3312 | spin_unlock(&fp->fi_lock); |
3313 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3314 | if (status) |
7e6a72e5 | 3315 | goto out; |
de18643d TM |
3316 | spin_lock(&fp->fi_lock); |
3317 | if (!fp->fi_fds[oflag]) { | |
3318 | fp->fi_fds[oflag] = filp; | |
3319 | filp = NULL; | |
3320 | } | |
f9d7562f | 3321 | } |
12659651 | 3322 | status = nfs4_file_get_access(fp, open->op_share_access); |
de18643d TM |
3323 | spin_unlock(&fp->fi_lock); |
3324 | if (filp) | |
3325 | fput(filp); | |
12659651 JL |
3326 | if (status) |
3327 | goto out_put_access; | |
f9d7562f | 3328 | |
7e6a72e5 CH |
3329 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3330 | if (status) | |
3331 | goto out_put_access; | |
3332 | ||
f9d7562f | 3333 | return nfs_ok; |
f9d7562f | 3334 | |
7e6a72e5 | 3335 | out_put_access: |
12659651 | 3336 | nfs4_file_put_access(fp, open->op_share_access); |
7e6a72e5 CH |
3337 | out: |
3338 | return status; | |
1da177e4 LT |
3339 | } |
3340 | ||
b37ad28b | 3341 | static __be32 |
dcef0413 | 3342 | 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 | 3343 | { |
b6d2f1ca | 3344 | u32 op_share_access = open->op_share_access; |
b37ad28b | 3345 | __be32 status; |
1da177e4 | 3346 | |
7e6a72e5 | 3347 | if (!test_access(op_share_access, stp)) |
0c12eaff | 3348 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
7e6a72e5 CH |
3349 | else |
3350 | status = nfsd4_truncate(rqstp, cur_fh, open); | |
3351 | ||
3352 | if (status) | |
1da177e4 | 3353 | return status; |
7e6a72e5 | 3354 | |
1da177e4 | 3355 | /* remember the open */ |
82c5ff1b | 3356 | set_access(op_share_access, stp); |
ce0fc43c | 3357 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
3358 | return nfs_ok; |
3359 | } | |
3360 | ||
3361 | ||
1da177e4 | 3362 | static void |
1255a8f3 | 3363 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3364 | { |
dad1c067 | 3365 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3366 | } |
3367 | ||
14a24e99 BF |
3368 | /* Should we give out recallable state?: */ |
3369 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3370 | { | |
3371 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3372 | return true; | |
3373 | /* | |
3374 | * In the sessions case, since we don't have to establish a | |
3375 | * separate connection for callbacks, we assume it's OK | |
3376 | * until we hear otherwise: | |
3377 | */ | |
3378 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3379 | } | |
3380 | ||
22d38c4c BF |
3381 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3382 | { | |
3383 | struct file_lock *fl; | |
3384 | ||
3385 | fl = locks_alloc_lock(); | |
3386 | if (!fl) | |
3387 | return NULL; | |
3388 | locks_init_lock(fl); | |
3389 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3390 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3391 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3392 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3393 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3394 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3395 | return fl; |
3396 | } | |
3397 | ||
99c41515 | 3398 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3399 | { |
acfdf5c3 | 3400 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3401 | struct file_lock *fl; |
3402 | int status; | |
3403 | ||
99c41515 | 3404 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3405 | if (!fl) |
3406 | return -ENOMEM; | |
acfdf5c3 | 3407 | fl->fl_file = find_readable_file(fp); |
acfdf5c3 | 3408 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
e873088f BF |
3409 | if (status) |
3410 | goto out_free; | |
acfdf5c3 | 3411 | fp->fi_lease = fl; |
de18643d | 3412 | fp->fi_deleg_file = fl->fl_file; |
acfdf5c3 | 3413 | atomic_set(&fp->fi_delegees, 1); |
cdc97505 | 3414 | spin_lock(&state_lock); |
931ee56c | 3415 | hash_delegation_locked(dp, fp); |
cdc97505 | 3416 | spin_unlock(&state_lock); |
acfdf5c3 | 3417 | return 0; |
e873088f | 3418 | out_free: |
de18643d TM |
3419 | if (fl->fl_file) |
3420 | fput(fl->fl_file); | |
e873088f BF |
3421 | locks_free_lock(fl); |
3422 | return status; | |
acfdf5c3 BF |
3423 | } |
3424 | ||
bf7bd3e9 | 3425 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3426 | { |
bf7bd3e9 BF |
3427 | if (fp->fi_had_conflict) |
3428 | return -EAGAIN; | |
3429 | get_nfs4_file(fp); | |
3430 | dp->dl_file = fp; | |
cbf7a75b BF |
3431 | if (!fp->fi_lease) |
3432 | return nfs4_setlease(dp); | |
cdc97505 | 3433 | spin_lock(&state_lock); |
cbf7a75b | 3434 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3435 | if (fp->fi_had_conflict) { |
cdc97505 | 3436 | spin_unlock(&state_lock); |
cbf7a75b | 3437 | return -EAGAIN; |
acfdf5c3 | 3438 | } |
931ee56c | 3439 | hash_delegation_locked(dp, fp); |
cdc97505 | 3440 | spin_unlock(&state_lock); |
edab9782 BF |
3441 | return 0; |
3442 | } | |
3443 | ||
4aa8913c BH |
3444 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3445 | { | |
3446 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3447 | if (status == -EAGAIN) | |
3448 | open->op_why_no_deleg = WND4_CONTENTION; | |
3449 | else { | |
3450 | open->op_why_no_deleg = WND4_RESOURCE; | |
3451 | switch (open->op_deleg_want) { | |
3452 | case NFS4_SHARE_WANT_READ_DELEG: | |
3453 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3454 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3455 | break; | |
3456 | case NFS4_SHARE_WANT_CANCEL: | |
3457 | open->op_why_no_deleg = WND4_CANCELLED; | |
3458 | break; | |
3459 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3460 | WARN_ON_ONCE(1); |
4aa8913c BH |
3461 | } |
3462 | } | |
3463 | } | |
3464 | ||
1da177e4 LT |
3465 | /* |
3466 | * Attempt to hand out a delegation. | |
99c41515 BF |
3467 | * |
3468 | * Note we don't support write delegations, and won't until the vfs has | |
3469 | * proper support for them. | |
1da177e4 LT |
3470 | */ |
3471 | static void | |
5ccb0066 SK |
3472 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3473 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3474 | { |
3475 | struct nfs4_delegation *dp; | |
fe0750e5 | 3476 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3477 | int cb_up; |
99c41515 | 3478 | int status = 0; |
1da177e4 | 3479 | |
fe0750e5 | 3480 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3481 | open->op_recall = 0; |
3482 | switch (open->op_claim_type) { | |
3483 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3484 | if (!cb_up) |
7b190fec | 3485 | open->op_recall = 1; |
99c41515 BF |
3486 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3487 | goto out_no_deleg; | |
7b190fec N |
3488 | break; |
3489 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3490 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3491 | /* |
3492 | * Let's not give out any delegations till everyone's | |
3493 | * had the chance to reclaim theirs.... | |
3494 | */ | |
5ccb0066 | 3495 | if (locks_in_grace(net)) |
99c41515 | 3496 | goto out_no_deleg; |
dad1c067 | 3497 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3498 | goto out_no_deleg; |
9a0590ae SD |
3499 | /* |
3500 | * Also, if the file was opened for write or | |
3501 | * create, there's a good chance the client's | |
3502 | * about to write to it, resulting in an | |
3503 | * immediate recall (since we don't support | |
3504 | * write delegations): | |
3505 | */ | |
7b190fec | 3506 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3507 | goto out_no_deleg; |
3508 | if (open->op_create == NFS4_OPEN_CREATE) | |
3509 | goto out_no_deleg; | |
7b190fec N |
3510 | break; |
3511 | default: | |
99c41515 | 3512 | goto out_no_deleg; |
7b190fec | 3513 | } |
99c41515 | 3514 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3515 | if (dp == NULL) |
3516 | goto out_no_deleg; | |
bf7bd3e9 | 3517 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3518 | if (status) |
dd239cc0 | 3519 | goto out_free; |
1da177e4 | 3520 | |
d5477a8d | 3521 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3522 | |
8c10cbdb | 3523 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3524 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3525 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3526 | return; |
3527 | out_free: | |
cbf7a75b | 3528 | destroy_delegation(dp); |
dd239cc0 | 3529 | out_no_deleg: |
99c41515 BF |
3530 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3531 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3532 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3533 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3534 | open->op_recall = 1; |
3535 | } | |
99c41515 BF |
3536 | |
3537 | /* 4.1 client asking for a delegation? */ | |
3538 | if (open->op_deleg_want) | |
3539 | nfsd4_open_deleg_none_ext(open, status); | |
3540 | return; | |
1da177e4 LT |
3541 | } |
3542 | ||
e27f49c3 BH |
3543 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3544 | struct nfs4_delegation *dp) | |
3545 | { | |
3546 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3547 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3548 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3549 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3550 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3551 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3552 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3553 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3554 | } | |
3555 | /* Otherwise the client must be confused wanting a delegation | |
3556 | * it already has, therefore we don't return | |
3557 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3558 | */ | |
3559 | } | |
3560 | ||
1da177e4 LT |
3561 | /* |
3562 | * called with nfs4_lock_state() held. | |
3563 | */ | |
b37ad28b | 3564 | __be32 |
1da177e4 LT |
3565 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3566 | { | |
6668958f | 3567 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3568 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3569 | struct nfs4_file *fp = NULL; |
3570 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3571 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3572 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3573 | __be32 status; |
1da177e4 | 3574 | |
1da177e4 LT |
3575 | /* |
3576 | * Lookup file; if found, lookup stateid and check open request, | |
3577 | * and check for delegations in the process of being recalled. | |
3578 | * If not found, create the nfs4_file struct | |
3579 | */ | |
950e0118 TM |
3580 | fp = find_or_add_file(ino, open->op_file); |
3581 | if (fp != open->op_file) { | |
1da177e4 LT |
3582 | if ((status = nfs4_check_open(fp, open, &stp))) |
3583 | goto out; | |
41d22663 | 3584 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3585 | if (status) |
3586 | goto out; | |
1da177e4 | 3587 | } else { |
950e0118 | 3588 | open->op_file = NULL; |
c44c5eeb | 3589 | status = nfserr_bad_stateid; |
8b289b2c | 3590 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3591 | goto out; |
3e772463 | 3592 | status = nfserr_jukebox; |
1da177e4 LT |
3593 | } |
3594 | ||
3595 | /* | |
3596 | * OPEN the file, or upgrade an existing OPEN. | |
3597 | * If truncate fails, the OPEN fails. | |
3598 | */ | |
3599 | if (stp) { | |
3600 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3601 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3602 | if (status) |
3603 | goto out; | |
3604 | } else { | |
4cdc951b | 3605 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3606 | if (status) |
1da177e4 | 3607 | goto out; |
4cdc951b BF |
3608 | stp = open->op_stp; |
3609 | open->op_stp = NULL; | |
996e0938 | 3610 | init_open_stateid(stp, fp, open); |
1da177e4 | 3611 | } |
dcef0413 BF |
3612 | update_stateid(&stp->st_stid.sc_stateid); |
3613 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3614 | |
d24433cd | 3615 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3616 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3617 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3618 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3619 | goto nodeleg; | |
3620 | } | |
3621 | } | |
3622 | ||
1da177e4 LT |
3623 | /* |
3624 | * Attempt to hand out a delegation. No error return, because the | |
3625 | * OPEN succeeds even if we fail. | |
3626 | */ | |
5ccb0066 | 3627 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3628 | nodeleg: |
1da177e4 LT |
3629 | status = nfs_ok; |
3630 | ||
8c10cbdb | 3631 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3632 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3633 | out: |
d24433cd BH |
3634 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3635 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3636 | open->op_deleg_want) |
3637 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3638 | |
13cd2184 N |
3639 | if (fp) |
3640 | put_nfs4_file(fp); | |
37515177 | 3641 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3642 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3643 | /* |
3644 | * To finish the open response, we just need to set the rflags. | |
3645 | */ | |
3646 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3647 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3648 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3649 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3650 | ||
3651 | return status; | |
3652 | } | |
3653 | ||
d29b20cd BF |
3654 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3655 | { | |
3656 | if (open->op_openowner) { | |
3657 | struct nfs4_openowner *oo = open->op_openowner; | |
3658 | ||
3659 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3660 | list_del_init(&oo->oo_close_lru); | |
3661 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3662 | if (status) { | |
3663 | release_openowner(oo); | |
3664 | open->op_openowner = NULL; | |
3665 | } else | |
3666 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3667 | } | |
3668 | } | |
32513b40 BF |
3669 | if (open->op_file) |
3670 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3671 | if (open->op_stp) |
ef79859e | 3672 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3673 | } |
3674 | ||
b37ad28b | 3675 | __be32 |
b591480b BF |
3676 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3677 | clientid_t *clid) | |
1da177e4 LT |
3678 | { |
3679 | struct nfs4_client *clp; | |
b37ad28b | 3680 | __be32 status; |
7f2210fa | 3681 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3682 | |
3683 | nfs4_lock_state(); | |
3684 | dprintk("process_renew(%08x/%08x): starting\n", | |
3685 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3686 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3687 | if (status) |
1da177e4 | 3688 | goto out; |
4b24ca7d | 3689 | clp = cstate->clp; |
1da177e4 | 3690 | status = nfserr_cb_path_down; |
ea1da636 | 3691 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3692 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3693 | goto out; |
3694 | status = nfs_ok; | |
3695 | out: | |
3696 | nfs4_unlock_state(); | |
3697 | return status; | |
3698 | } | |
3699 | ||
a76b4319 | 3700 | static void |
12760c66 | 3701 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3702 | { |
33dcc481 | 3703 | /* do nothing if grace period already ended */ |
a51c84ed | 3704 | if (nn->grace_ended) |
33dcc481 JL |
3705 | return; |
3706 | ||
a76b4319 | 3707 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3708 | nn->grace_ended = true; |
12760c66 | 3709 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3710 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3711 | /* |
3712 | * Now that every NFSv4 client has had the chance to recover and | |
3713 | * to see the (possibly new, possibly shorter) lease time, we | |
3714 | * can safely set the next grace time to the current lease time: | |
3715 | */ | |
5284b44e | 3716 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3717 | } |
3718 | ||
fd39ca9a | 3719 | static time_t |
09121281 | 3720 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3721 | { |
3722 | struct nfs4_client *clp; | |
fe0750e5 | 3723 | struct nfs4_openowner *oo; |
1da177e4 LT |
3724 | struct nfs4_delegation *dp; |
3725 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3726 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3727 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3728 | |
3729 | nfs4_lock_state(); | |
3730 | ||
3731 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3732 | nfsd4_end_grace(nn); |
36acb66b | 3733 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3734 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3735 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3736 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3737 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3738 | t = clp->cl_time - cutoff; | |
a832e7ae | 3739 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3740 | break; |
3741 | } | |
221a6876 | 3742 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3743 | dprintk("NFSD: client in use (clientid %08x)\n", |
3744 | clp->cl_clientid.cl_id); | |
3745 | continue; | |
3746 | } | |
221a6876 | 3747 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3748 | } |
c9a49628 | 3749 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3750 | list_for_each_safe(pos, next, &reaplist) { |
3751 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3752 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3753 | clp->cl_clientid.cl_id); | |
3754 | expire_client(clp); | |
3755 | } | |
cdc97505 | 3756 | spin_lock(&state_lock); |
e8c69d17 | 3757 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3758 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3759 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3760 | continue; | |
1da177e4 | 3761 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3762 | t = dp->dl_time - cutoff; |
3763 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3764 | break; |
3765 | } | |
1da177e4 LT |
3766 | list_move(&dp->dl_recall_lru, &reaplist); |
3767 | } | |
cdc97505 | 3768 | spin_unlock(&state_lock); |
1da177e4 LT |
3769 | list_for_each_safe(pos, next, &reaplist) { |
3770 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3771 | revoke_delegation(dp); |
1da177e4 | 3772 | } |
73758fed | 3773 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3774 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3775 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3776 | t = oo->oo_time - cutoff; |
3777 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3778 | break; |
3779 | } | |
fe0750e5 | 3780 | release_openowner(oo); |
1da177e4 | 3781 | } |
a832e7ae | 3782 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3783 | nfs4_unlock_state(); |
a832e7ae | 3784 | return new_timeo; |
1da177e4 LT |
3785 | } |
3786 | ||
a254b246 HH |
3787 | static struct workqueue_struct *laundry_wq; |
3788 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3789 | |
3790 | static void | |
09121281 | 3791 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3792 | { |
3793 | time_t t; | |
09121281 SK |
3794 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3795 | work); | |
3796 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3797 | laundromat_work); | |
1da177e4 | 3798 | |
09121281 | 3799 | t = nfs4_laundromat(nn); |
1da177e4 | 3800 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3801 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3802 | } |
3803 | ||
f7a4d872 | 3804 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3805 | { |
f7a4d872 BF |
3806 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3807 | return nfserr_bad_stateid; | |
3808 | return nfs_ok; | |
1da177e4 LT |
3809 | } |
3810 | ||
1da177e4 | 3811 | static inline int |
82c5ff1b | 3812 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3813 | { |
82c5ff1b JL |
3814 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3815 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3816 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3817 | } |
3818 | ||
3819 | static inline int | |
82c5ff1b | 3820 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3821 | { |
82c5ff1b JL |
3822 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3823 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3824 | } |
3825 | ||
3826 | static | |
dcef0413 | 3827 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3828 | { |
b37ad28b | 3829 | __be32 status = nfserr_openmode; |
1da177e4 | 3830 | |
02921914 BF |
3831 | /* For lock stateid's, we test the parent open, not the lock: */ |
3832 | if (stp->st_openstp) | |
3833 | stp = stp->st_openstp; | |
82c5ff1b | 3834 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3835 | goto out; |
82c5ff1b | 3836 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3837 | goto out; |
3838 | status = nfs_ok; | |
3839 | out: | |
3840 | return status; | |
3841 | } | |
3842 | ||
b37ad28b | 3843 | static inline __be32 |
5ccb0066 | 3844 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3845 | { |
203a8c8e | 3846 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3847 | return nfs_ok; |
5ccb0066 | 3848 | else if (locks_in_grace(net)) { |
25985edc | 3849 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3850 | * conflicting state; so we must wait out the grace period. */ |
3851 | return nfserr_grace; | |
3852 | } else if (flags & WR_STATE) | |
3853 | return nfs4_share_conflict(current_fh, | |
3854 | NFS4_SHARE_DENY_WRITE); | |
3855 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3856 | return nfs4_share_conflict(current_fh, | |
3857 | NFS4_SHARE_DENY_READ); | |
3858 | } | |
3859 | ||
3860 | /* | |
3861 | * Allow READ/WRITE during grace period on recovered state only for files | |
3862 | * that are not able to provide mandatory locking. | |
3863 | */ | |
3864 | static inline int | |
5ccb0066 | 3865 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3866 | { |
5ccb0066 | 3867 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3868 | } |
3869 | ||
81b82965 BF |
3870 | /* Returns true iff a is later than b: */ |
3871 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3872 | { | |
1a9357f4 | 3873 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3874 | } |
3875 | ||
57b7b43b | 3876 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3877 | { |
6668958f AA |
3878 | /* |
3879 | * When sessions are used the stateid generation number is ignored | |
3880 | * when it is zero. | |
3881 | */ | |
28dde241 | 3882 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3883 | return nfs_ok; |
3884 | ||
3885 | if (in->si_generation == ref->si_generation) | |
3886 | return nfs_ok; | |
6668958f | 3887 | |
0836f587 | 3888 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3889 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3890 | return nfserr_bad_stateid; |
3891 | /* | |
81b82965 BF |
3892 | * However, we could see a stateid from the past, even from a |
3893 | * non-buggy client. For example, if the client sends a lock | |
3894 | * while some IO is outstanding, the lock may bump si_generation | |
3895 | * while the IO is still in flight. The client could avoid that | |
3896 | * situation by waiting for responses on all the IO requests, | |
3897 | * but better performance may result in retrying IO that | |
3898 | * receives an old_stateid error if requests are rarely | |
3899 | * reordered in flight: | |
0836f587 | 3900 | */ |
81b82965 | 3901 | return nfserr_old_stateid; |
0836f587 BF |
3902 | } |
3903 | ||
7df302f7 | 3904 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3905 | { |
97b7e3b6 BF |
3906 | struct nfs4_stid *s; |
3907 | struct nfs4_ol_stateid *ols; | |
3908 | __be32 status; | |
17456804 | 3909 | |
7df302f7 CL |
3910 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3911 | return nfserr_bad_stateid; | |
3912 | /* Client debugging aid. */ | |
3913 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3914 | char addr_str[INET6_ADDRSTRLEN]; | |
3915 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3916 | sizeof(addr_str)); | |
3917 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3918 | "with incorrect client ID\n", addr_str); | |
3919 | return nfserr_bad_stateid; | |
3920 | } | |
38c2f4b1 | 3921 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3922 | if (!s) |
7df302f7 | 3923 | return nfserr_bad_stateid; |
36279ac1 | 3924 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3925 | if (status) |
97b7e3b6 | 3926 | return status; |
23340032 BF |
3927 | switch (s->sc_type) { |
3928 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3929 | return nfs_ok; |
3bd64a5b BF |
3930 | case NFS4_REVOKED_DELEG_STID: |
3931 | return nfserr_deleg_revoked; | |
23340032 BF |
3932 | case NFS4_OPEN_STID: |
3933 | case NFS4_LOCK_STID: | |
3934 | ols = openlockstateid(s); | |
3935 | if (ols->st_stateowner->so_is_open_owner | |
3936 | && !(openowner(ols->st_stateowner)->oo_flags | |
3937 | & NFS4_OO_CONFIRMED)) | |
3938 | return nfserr_bad_stateid; | |
97b7e3b6 | 3939 | return nfs_ok; |
23340032 BF |
3940 | default: |
3941 | printk("unknown stateid type %x\n", s->sc_type); | |
3942 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3943 | return nfserr_bad_stateid; |
23340032 | 3944 | } |
17456804 BS |
3945 | } |
3946 | ||
2dd6e458 TM |
3947 | static __be32 |
3948 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
3949 | stateid_t *stateid, unsigned char typemask, | |
3950 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 3951 | { |
0eb6f20a | 3952 | __be32 status; |
38c2f4b1 BF |
3953 | |
3954 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3955 | return nfserr_bad_stateid; | |
4b24ca7d | 3956 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 3957 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 3958 | if (cstate->session) |
a8a7c677 | 3959 | return nfserr_bad_stateid; |
38c2f4b1 | 3960 | return nfserr_stale_stateid; |
a8a7c677 | 3961 | } |
0eb6f20a BF |
3962 | if (status) |
3963 | return status; | |
4b24ca7d | 3964 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
3965 | if (!*s) |
3966 | return nfserr_bad_stateid; | |
3967 | return nfs_ok; | |
38c2f4b1 BF |
3968 | } |
3969 | ||
1da177e4 LT |
3970 | /* |
3971 | * Checks for stateid operations | |
3972 | */ | |
b37ad28b | 3973 | __be32 |
5ccb0066 | 3974 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3975 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3976 | { |
69064a27 | 3977 | struct nfs4_stid *s; |
dcef0413 | 3978 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3979 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3980 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3981 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3982 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 3983 | struct file *file = NULL; |
b37ad28b | 3984 | __be32 status; |
1da177e4 | 3985 | |
1da177e4 LT |
3986 | if (filpp) |
3987 | *filpp = NULL; | |
3988 | ||
5ccb0066 | 3989 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3990 | return nfserr_grace; |
3991 | ||
3992 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3993 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3994 | |
14bcab1a TM |
3995 | nfs4_lock_state(); |
3996 | ||
2dd6e458 | 3997 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 3998 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 3999 | &s, nn); |
38c2f4b1 | 4000 | if (status) |
14bcab1a | 4001 | goto out; |
69064a27 BF |
4002 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
4003 | if (status) | |
4004 | goto out; | |
f7a4d872 BF |
4005 | switch (s->sc_type) { |
4006 | case NFS4_DELEG_STID: | |
69064a27 | 4007 | dp = delegstateid(s); |
dc9bf700 BF |
4008 | status = nfs4_check_delegmode(dp, flags); |
4009 | if (status) | |
4010 | goto out; | |
43b0178e | 4011 | if (filpp) { |
14bcab1a TM |
4012 | file = dp->dl_file->fi_deleg_file; |
4013 | if (!file) { | |
063b0fb9 BF |
4014 | WARN_ON_ONCE(1); |
4015 | status = nfserr_serverfault; | |
4016 | goto out; | |
4017 | } | |
de18643d | 4018 | get_file(file); |
43b0178e | 4019 | } |
f7a4d872 BF |
4020 | break; |
4021 | case NFS4_OPEN_STID: | |
4022 | case NFS4_LOCK_STID: | |
69064a27 | 4023 | stp = openlockstateid(s); |
f7a4d872 BF |
4024 | status = nfs4_check_fh(current_fh, stp); |
4025 | if (status) | |
1da177e4 | 4026 | goto out; |
fe0750e5 | 4027 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4028 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4029 | goto out; |
a4455be0 BF |
4030 | status = nfs4_check_openmode(stp, flags); |
4031 | if (status) | |
1da177e4 | 4032 | goto out; |
f9d7562f BF |
4033 | if (filpp) { |
4034 | if (flags & RD_STATE) | |
14bcab1a | 4035 | file = find_readable_file(stp->st_file); |
f9d7562f | 4036 | else |
14bcab1a | 4037 | file = find_writeable_file(stp->st_file); |
f9d7562f | 4038 | } |
f7a4d872 BF |
4039 | break; |
4040 | default: | |
14bcab1a TM |
4041 | status = nfserr_bad_stateid; |
4042 | goto out; | |
1da177e4 LT |
4043 | } |
4044 | status = nfs_ok; | |
14bcab1a | 4045 | if (file) |
de18643d | 4046 | *filpp = file; |
1da177e4 | 4047 | out: |
14bcab1a | 4048 | nfs4_unlock_state(); |
1da177e4 LT |
4049 | return status; |
4050 | } | |
4051 | ||
e1ca12df | 4052 | static __be32 |
dcef0413 | 4053 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4054 | { |
a1b8ff4c BF |
4055 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4056 | ||
4057 | if (check_for_locks(stp->st_file, lo)) | |
e1ca12df | 4058 | return nfserr_locks_held; |
c53530da | 4059 | release_lockowner_if_empty(lo); |
e1ca12df BS |
4060 | return nfs_ok; |
4061 | } | |
4062 | ||
17456804 BS |
4063 | /* |
4064 | * Test if the stateid is valid | |
4065 | */ | |
4066 | __be32 | |
4067 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4068 | struct nfsd4_test_stateid *test_stateid) | |
4069 | { | |
03cfb420 BS |
4070 | struct nfsd4_test_stateid_id *stateid; |
4071 | struct nfs4_client *cl = cstate->session->se_client; | |
4072 | ||
4073 | nfs4_lock_state(); | |
4074 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4075 | stateid->ts_id_status = |
4076 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4077 | nfs4_unlock_state(); |
4078 | ||
17456804 BS |
4079 | return nfs_ok; |
4080 | } | |
4081 | ||
e1ca12df BS |
4082 | __be32 |
4083 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4084 | struct nfsd4_free_stateid *free_stateid) | |
4085 | { | |
4086 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4087 | struct nfs4_stid *s; |
3bd64a5b | 4088 | struct nfs4_delegation *dp; |
38c2f4b1 | 4089 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4090 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4091 | |
4092 | nfs4_lock_state(); | |
38c2f4b1 | 4093 | s = find_stateid(cl, stateid); |
2da1cec7 | 4094 | if (!s) |
81b82965 | 4095 | goto out; |
2da1cec7 BF |
4096 | switch (s->sc_type) { |
4097 | case NFS4_DELEG_STID: | |
e1ca12df BS |
4098 | ret = nfserr_locks_held; |
4099 | goto out; | |
2da1cec7 BF |
4100 | case NFS4_OPEN_STID: |
4101 | case NFS4_LOCK_STID: | |
4102 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4103 | if (ret) | |
4104 | goto out; | |
4105 | if (s->sc_type == NFS4_LOCK_STID) | |
4106 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4107 | else | |
4108 | ret = nfserr_locks_held; | |
f7a4d872 | 4109 | break; |
3bd64a5b BF |
4110 | case NFS4_REVOKED_DELEG_STID: |
4111 | dp = delegstateid(s); | |
4112 | destroy_revoked_delegation(dp); | |
4113 | ret = nfs_ok; | |
4114 | break; | |
f7a4d872 BF |
4115 | default: |
4116 | ret = nfserr_bad_stateid; | |
e1ca12df | 4117 | } |
e1ca12df BS |
4118 | out: |
4119 | nfs4_unlock_state(); | |
4120 | return ret; | |
4121 | } | |
4122 | ||
4c4cd222 N |
4123 | static inline int |
4124 | setlkflg (int type) | |
4125 | { | |
4126 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4127 | RD_STATE : WR_STATE; | |
4128 | } | |
1da177e4 | 4129 | |
dcef0413 | 4130 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4131 | { |
4132 | struct svc_fh *current_fh = &cstate->current_fh; | |
4133 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4134 | __be32 status; | |
4135 | ||
c0a5d93e BF |
4136 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4137 | if (status) | |
4138 | return status; | |
3bd64a5b BF |
4139 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4140 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4141 | /* |
4142 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4143 | * nfserr_replay_me from the previous step, and |
4144 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4145 | */ |
4146 | return nfserr_bad_stateid; | |
4147 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4148 | if (status) | |
4149 | return status; | |
4150 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4151 | } |
4152 | ||
1da177e4 LT |
4153 | /* |
4154 | * Checks for sequence id mutating operations. | |
4155 | */ | |
b37ad28b | 4156 | static __be32 |
dd453dfd | 4157 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4158 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4159 | struct nfs4_ol_stateid **stpp, |
4160 | struct nfsd_net *nn) | |
1da177e4 | 4161 | { |
0836f587 | 4162 | __be32 status; |
38c2f4b1 | 4163 | struct nfs4_stid *s; |
e17f99b7 | 4164 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4165 | |
8c10cbdb BH |
4166 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4167 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4168 | |
1da177e4 | 4169 | *stpp = NULL; |
2dd6e458 | 4170 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4171 | if (status) |
4172 | return status; | |
e17f99b7 | 4173 | stp = openlockstateid(s); |
3d74e6a5 | 4174 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4175 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4176 | |
e17f99b7 TM |
4177 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4178 | if (!status) | |
4179 | *stpp = stp; | |
4180 | return status; | |
c0a5d93e | 4181 | } |
39325bd0 | 4182 | |
3320fef1 SK |
4183 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4184 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4185 | { |
4186 | __be32 status; | |
4187 | struct nfs4_openowner *oo; | |
1da177e4 | 4188 | |
c0a5d93e | 4189 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4190 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4191 | if (status) |
4192 | return status; | |
c0a5d93e | 4193 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4194 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4195 | return nfserr_bad_stateid; |
3a4f98bb | 4196 | return nfs_ok; |
1da177e4 LT |
4197 | } |
4198 | ||
b37ad28b | 4199 | __be32 |
ca364317 | 4200 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4201 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4202 | { |
b37ad28b | 4203 | __be32 status; |
fe0750e5 | 4204 | struct nfs4_openowner *oo; |
dcef0413 | 4205 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4206 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4207 | |
a6a9f18f AV |
4208 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4209 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4210 | |
ca364317 | 4211 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4212 | if (status) |
4213 | return status; | |
1da177e4 LT |
4214 | |
4215 | nfs4_lock_state(); | |
4216 | ||
9072d5c6 | 4217 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4218 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4219 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4220 | if (status) |
68b66e82 | 4221 | goto out; |
fe0750e5 | 4222 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4223 | status = nfserr_bad_stateid; |
dad1c067 | 4224 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4225 | goto out; |
dad1c067 | 4226 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4227 | update_stateid(&stp->st_stid.sc_stateid); |
4228 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4229 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4230 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4231 | |
2a4317c5 | 4232 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4233 | status = nfs_ok; |
1da177e4 | 4234 | out: |
9411b1d4 | 4235 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4236 | if (!cstate->replay_owner) |
4237 | nfs4_unlock_state(); | |
1da177e4 LT |
4238 | return status; |
4239 | } | |
4240 | ||
6409a5a6 | 4241 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4242 | { |
82c5ff1b | 4243 | if (!test_access(access, stp)) |
6409a5a6 | 4244 | return; |
12659651 | 4245 | nfs4_file_put_access(stp->st_file, access); |
82c5ff1b | 4246 | clear_access(access, stp); |
6409a5a6 | 4247 | } |
f197c271 | 4248 | |
6409a5a6 BF |
4249 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4250 | { | |
4251 | switch (to_access) { | |
4252 | case NFS4_SHARE_ACCESS_READ: | |
4253 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4254 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4255 | break; | |
4256 | case NFS4_SHARE_ACCESS_WRITE: | |
4257 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4258 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4259 | break; | |
4260 | case NFS4_SHARE_ACCESS_BOTH: | |
4261 | break; | |
4262 | default: | |
063b0fb9 | 4263 | WARN_ON_ONCE(1); |
1da177e4 LT |
4264 | } |
4265 | } | |
4266 | ||
4267 | static void | |
ce0fc43c | 4268 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
4269 | { |
4270 | int i; | |
4271 | for (i = 0; i < 4; i++) { | |
4272 | if ((i & deny) != i) | |
ce0fc43c | 4273 | clear_deny(i, stp); |
1da177e4 LT |
4274 | } |
4275 | } | |
4276 | ||
b37ad28b | 4277 | __be32 |
ca364317 BF |
4278 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4279 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4280 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4281 | { |
b37ad28b | 4282 | __be32 status; |
dcef0413 | 4283 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4284 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4285 | |
a6a9f18f AV |
4286 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4287 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4288 | |
c30e92df | 4289 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4290 | if (od->od_deleg_want) |
4291 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4292 | od->od_deleg_want); | |
1da177e4 LT |
4293 | |
4294 | nfs4_lock_state(); | |
c0a5d93e | 4295 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4296 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4297 | if (status) |
1da177e4 | 4298 | goto out; |
1da177e4 | 4299 | status = nfserr_inval; |
82c5ff1b | 4300 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 4301 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 LT |
4302 | stp->st_access_bmap, od->od_share_access); |
4303 | goto out; | |
4304 | } | |
ce0fc43c | 4305 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 4306 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 LT |
4307 | stp->st_deny_bmap, od->od_share_deny); |
4308 | goto out; | |
4309 | } | |
6409a5a6 | 4310 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4311 | |
ce0fc43c | 4312 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4313 | |
dcef0413 BF |
4314 | update_stateid(&stp->st_stid.sc_stateid); |
4315 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4316 | status = nfs_ok; |
4317 | out: | |
9411b1d4 | 4318 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4319 | if (!cstate->replay_owner) |
4320 | nfs4_unlock_state(); | |
1da177e4 LT |
4321 | return status; |
4322 | } | |
4323 | ||
f7a4d872 BF |
4324 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4325 | { | |
acf9295b TM |
4326 | struct nfs4_client *clp = s->st_stid.sc_client; |
4327 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4328 | ||
f7a4d872 | 4329 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4330 | unhash_open_stateid(s); |
4331 | ||
4332 | if (clp->cl_minorversion) { | |
4333 | free_generic_stateid(s); | |
4334 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4335 | release_openowner(oo); | |
4336 | } else { | |
4337 | oo->oo_last_closed_stid = s; | |
4338 | /* | |
4339 | * In the 4.0 case we need to keep the owners around a | |
4340 | * little while to handle CLOSE replay. | |
4341 | */ | |
4342 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4343 | move_to_close_lru(oo, clp->net); | |
4344 | } | |
38c387b5 BF |
4345 | } |
4346 | ||
1da177e4 LT |
4347 | /* |
4348 | * nfs4_unlock_state() called after encode | |
4349 | */ | |
b37ad28b | 4350 | __be32 |
ca364317 | 4351 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4352 | struct nfsd4_close *close) |
1da177e4 | 4353 | { |
b37ad28b | 4354 | __be32 status; |
dcef0413 | 4355 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4356 | struct net *net = SVC_NET(rqstp); |
4357 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4358 | |
a6a9f18f AV |
4359 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4360 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4361 | |
4362 | nfs4_lock_state(); | |
f7a4d872 BF |
4363 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4364 | &close->cl_stateid, | |
4365 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4366 | &stp, nn); |
9411b1d4 | 4367 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4368 | if (status) |
1da177e4 | 4369 | goto out; |
dcef0413 BF |
4370 | update_stateid(&stp->st_stid.sc_stateid); |
4371 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4372 | |
f7a4d872 | 4373 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4374 | out: |
5ec094c1 BF |
4375 | if (!cstate->replay_owner) |
4376 | nfs4_unlock_state(); | |
1da177e4 LT |
4377 | return status; |
4378 | } | |
4379 | ||
b37ad28b | 4380 | __be32 |
ca364317 BF |
4381 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4382 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4383 | { |
203a8c8e BF |
4384 | struct nfs4_delegation *dp; |
4385 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4386 | struct nfs4_stid *s; |
b37ad28b | 4387 | __be32 status; |
3320fef1 | 4388 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4389 | |
ca364317 | 4390 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4391 | return status; |
1da177e4 LT |
4392 | |
4393 | nfs4_lock_state(); | |
2dd6e458 | 4394 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4395 | if (status) |
203a8c8e | 4396 | goto out; |
38c2f4b1 | 4397 | dp = delegstateid(s); |
d5477a8d | 4398 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4399 | if (status) |
4400 | goto out; | |
203a8c8e | 4401 | |
3bd64a5b | 4402 | destroy_delegation(dp); |
1da177e4 | 4403 | out: |
203a8c8e BF |
4404 | nfs4_unlock_state(); |
4405 | ||
1da177e4 LT |
4406 | return status; |
4407 | } | |
4408 | ||
4409 | ||
1da177e4 | 4410 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4411 | |
87df4de8 BH |
4412 | static inline u64 |
4413 | end_offset(u64 start, u64 len) | |
4414 | { | |
4415 | u64 end; | |
4416 | ||
4417 | end = start + len; | |
4418 | return end >= start ? end: NFS4_MAX_UINT64; | |
4419 | } | |
4420 | ||
4421 | /* last octet in a range */ | |
4422 | static inline u64 | |
4423 | last_byte_offset(u64 start, u64 len) | |
4424 | { | |
4425 | u64 end; | |
4426 | ||
063b0fb9 | 4427 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4428 | end = start + len; |
4429 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4430 | } | |
4431 | ||
1da177e4 LT |
4432 | /* |
4433 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4434 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4435 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4436 | * locking, this prevents us from being completely protocol-compliant. The | |
4437 | * real solution to this problem is to start using unsigned file offsets in | |
4438 | * the VFS, but this is a very deep change! | |
4439 | */ | |
4440 | static inline void | |
4441 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4442 | { | |
4443 | if (lock->fl_start < 0) | |
4444 | lock->fl_start = OFFSET_MAX; | |
4445 | if (lock->fl_end < 0) | |
4446 | lock->fl_end = OFFSET_MAX; | |
4447 | } | |
4448 | ||
d5b9026a N |
4449 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4450 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4451 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4452 | }; |
1da177e4 LT |
4453 | |
4454 | static inline void | |
4455 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4456 | { | |
fe0750e5 | 4457 | struct nfs4_lockowner *lo; |
1da177e4 | 4458 | |
d5b9026a | 4459 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4460 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4461 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4462 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4463 | if (!deny->ld_owner.data) |
4464 | /* We just don't care that much */ | |
4465 | goto nevermind; | |
fe0750e5 BF |
4466 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4467 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4468 | } else { |
7c13f344 BF |
4469 | nevermind: |
4470 | deny->ld_owner.len = 0; | |
4471 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4472 | deny->ld_clientid.cl_boot = 0; |
4473 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4474 | } |
4475 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4476 | deny->ld_length = NFS4_MAX_UINT64; |
4477 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4478 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4479 | deny->ld_type = NFS4_READ_LT; | |
4480 | if (fl->fl_type != F_RDLCK) | |
4481 | deny->ld_type = NFS4_WRITE_LT; | |
4482 | } | |
4483 | ||
fe0750e5 | 4484 | static struct nfs4_lockowner * |
b3c32bcd TM |
4485 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4486 | struct nfsd_net *nn) | |
1da177e4 | 4487 | { |
b3c32bcd TM |
4488 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4489 | struct nfs4_stateowner *so; | |
1da177e4 | 4490 | |
b3c32bcd TM |
4491 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4492 | if (so->so_is_open_owner) | |
4493 | continue; | |
4494 | if (!same_owner_str(so, owner, clid)) | |
4495 | continue; | |
4496 | return lockowner(so); | |
1da177e4 LT |
4497 | } |
4498 | return NULL; | |
4499 | } | |
4500 | ||
4501 | /* | |
4502 | * Alloc a lock owner structure. | |
4503 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4504 | * occurred. |
1da177e4 | 4505 | * |
16bfdaaf | 4506 | * strhashval = ownerstr_hashval |
1da177e4 | 4507 | */ |
fe0750e5 | 4508 | static struct nfs4_lockowner * |
dcef0413 | 4509 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4510 | struct nfs4_lockowner *lo; |
b3c32bcd | 4511 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4512 | |
fe0750e5 BF |
4513 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4514 | if (!lo) | |
1da177e4 | 4515 | return NULL; |
fe0750e5 BF |
4516 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4517 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4518 | /* It is the openowner seqid that will be incremented in encode in the |
4519 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4520 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4521 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4522 | return lo; |
1da177e4 LT |
4523 | } |
4524 | ||
dcef0413 BF |
4525 | static struct nfs4_ol_stateid * |
4526 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4527 | { |
dcef0413 | 4528 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4529 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4530 | |
996e0938 | 4531 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4532 | if (stp == NULL) |
6136d2b4 | 4533 | return NULL; |
3abdb607 | 4534 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 BF |
4535 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4536 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4537 | get_nfs4_file(fp); |
1da177e4 | 4538 | stp->st_file = fp; |
0997b173 | 4539 | stp->st_access_bmap = 0; |
1da177e4 | 4540 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4541 | stp->st_openstp = open_stp; |
3c87b9b7 | 4542 | list_add(&stp->st_locks, &open_stp->st_locks); |
1d31a253 TM |
4543 | spin_lock(&fp->fi_lock); |
4544 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4545 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4546 | return stp; |
4547 | } | |
4548 | ||
c53530da JL |
4549 | static struct nfs4_ol_stateid * |
4550 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4551 | { | |
4552 | struct nfs4_ol_stateid *lst; | |
4553 | ||
4554 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
4555 | if (lst->st_file == fp) | |
4556 | return lst; | |
4557 | } | |
4558 | return NULL; | |
4559 | } | |
4560 | ||
4561 | ||
fd39ca9a | 4562 | static int |
1da177e4 LT |
4563 | check_lock_length(u64 offset, u64 length) |
4564 | { | |
87df4de8 | 4565 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4566 | LOFF_OVERFLOW(offset, length))); |
4567 | } | |
4568 | ||
dcef0413 | 4569 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4570 | { |
4571 | struct nfs4_file *fp = lock_stp->st_file; | |
0997b173 | 4572 | |
82c5ff1b | 4573 | if (test_access(access, lock_stp)) |
0997b173 | 4574 | return; |
12659651 | 4575 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4576 | set_access(access, lock_stp); |
0997b173 BF |
4577 | } |
4578 | ||
2355c596 | 4579 | static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
64a284d0 BF |
4580 | { |
4581 | struct nfs4_file *fi = ost->st_file; | |
4582 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4583 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4584 | struct nfs4_lockowner *lo; | |
4585 | unsigned int strhashval; | |
20e9e2bc | 4586 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4587 | |
b3c32bcd | 4588 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4589 | if (!lo) { |
4590 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4591 | &lock->v.new.owner); | |
4592 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4593 | if (lo == NULL) | |
4594 | return nfserr_jukebox; | |
4595 | } else { | |
4596 | /* with an existing lockowner, seqids must be the same */ | |
4597 | if (!cstate->minorversion && | |
4598 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4599 | return nfserr_bad_seqid; |
64a284d0 | 4600 | } |
c53530da JL |
4601 | |
4602 | *lst = find_lock_stateid(lo, fi); | |
64a284d0 | 4603 | if (*lst == NULL) { |
c53530da JL |
4604 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
4605 | if (*lst == NULL) { | |
4606 | release_lockowner_if_empty(lo); | |
4607 | return nfserr_jukebox; | |
4608 | } | |
4609 | *new = true; | |
64a284d0 | 4610 | } |
64a284d0 BF |
4611 | return nfs_ok; |
4612 | } | |
4613 | ||
1da177e4 LT |
4614 | /* |
4615 | * LOCK operation | |
4616 | */ | |
b37ad28b | 4617 | __be32 |
ca364317 | 4618 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4619 | struct nfsd4_lock *lock) |
1da177e4 | 4620 | { |
fe0750e5 BF |
4621 | struct nfs4_openowner *open_sop = NULL; |
4622 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4623 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4624 | struct file *filp = NULL; |
21179d81 JL |
4625 | struct file_lock *file_lock = NULL; |
4626 | struct file_lock *conflock = NULL; | |
b37ad28b | 4627 | __be32 status = 0; |
64a284d0 | 4628 | bool new_state = false; |
b34f27aa | 4629 | int lkflg; |
b8dd7b9a | 4630 | int err; |
3320fef1 SK |
4631 | struct net *net = SVC_NET(rqstp); |
4632 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4633 | |
4634 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4635 | (long long) lock->lk_offset, | |
4636 | (long long) lock->lk_length); | |
4637 | ||
1da177e4 LT |
4638 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4639 | return nfserr_inval; | |
4640 | ||
ca364317 | 4641 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4642 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4643 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4644 | return status; | |
4645 | } | |
4646 | ||
1da177e4 LT |
4647 | nfs4_lock_state(); |
4648 | ||
4649 | if (lock->lk_is_new) { | |
dcef0413 | 4650 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4651 | |
4652 | if (nfsd4_has_session(cstate)) | |
4653 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4654 | memcpy(&lock->v.new.clientid, | |
4655 | &cstate->session->se_client->cl_clientid, | |
4656 | sizeof(clientid_t)); | |
4657 | ||
1da177e4 | 4658 | status = nfserr_stale_clientid; |
2c142baa | 4659 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4660 | goto out; |
1da177e4 | 4661 | |
1da177e4 | 4662 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4663 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4664 | lock->lk_new_open_seqid, |
4665 | &lock->lk_new_open_stateid, | |
3320fef1 | 4666 | &open_stp, nn); |
37515177 | 4667 | if (status) |
1da177e4 | 4668 | goto out; |
fe0750e5 | 4669 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4670 | status = nfserr_bad_stateid; |
684e5638 | 4671 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4672 | &lock->v.new.clientid)) |
4673 | goto out; | |
64a284d0 BF |
4674 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4675 | &lock_stp, &new_state); | |
e1aaa891 | 4676 | } else |
dd453dfd | 4677 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4678 | lock->lk_old_lock_seqid, |
4679 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4680 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4681 | if (status) |
4682 | goto out; | |
64a284d0 | 4683 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4684 | |
b34f27aa BF |
4685 | lkflg = setlkflg(lock->lk_type); |
4686 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4687 | if (status) | |
4688 | goto out; | |
4689 | ||
0dd395dc | 4690 | status = nfserr_grace; |
3320fef1 | 4691 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4692 | goto out; |
4693 | status = nfserr_no_grace; | |
3320fef1 | 4694 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4695 | goto out; |
4696 | ||
21179d81 JL |
4697 | file_lock = locks_alloc_lock(); |
4698 | if (!file_lock) { | |
4699 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4700 | status = nfserr_jukebox; | |
4701 | goto out; | |
4702 | } | |
4703 | ||
4704 | locks_init_lock(file_lock); | |
1da177e4 LT |
4705 | switch (lock->lk_type) { |
4706 | case NFS4_READ_LT: | |
4707 | case NFS4_READW_LT: | |
0997b173 BF |
4708 | filp = find_readable_file(lock_stp->st_file); |
4709 | if (filp) | |
4710 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4711 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4712 | break; |
1da177e4 LT |
4713 | case NFS4_WRITE_LT: |
4714 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4715 | filp = find_writeable_file(lock_stp->st_file); |
4716 | if (filp) | |
4717 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4718 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4719 | break; |
1da177e4 LT |
4720 | default: |
4721 | status = nfserr_inval; | |
4722 | goto out; | |
4723 | } | |
f9d7562f BF |
4724 | if (!filp) { |
4725 | status = nfserr_openmode; | |
4726 | goto out; | |
4727 | } | |
21179d81 JL |
4728 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4729 | file_lock->fl_pid = current->tgid; | |
4730 | file_lock->fl_file = filp; | |
4731 | file_lock->fl_flags = FL_POSIX; | |
4732 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4733 | file_lock->fl_start = lock->lk_offset; | |
4734 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4735 | nfs4_transform_lock_offset(file_lock); | |
4736 | ||
4737 | conflock = locks_alloc_lock(); | |
4738 | if (!conflock) { | |
4739 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4740 | status = nfserr_jukebox; | |
4741 | goto out; | |
4742 | } | |
1da177e4 | 4743 | |
21179d81 | 4744 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4745 | switch (-err) { |
1da177e4 | 4746 | case 0: /* success! */ |
dcef0413 BF |
4747 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4748 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4749 | sizeof(stateid_t)); |
b8dd7b9a | 4750 | status = 0; |
eb76b3fd AA |
4751 | break; |
4752 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4753 | status = nfserr_denied; | |
4754 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4755 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4756 | break; |
1da177e4 LT |
4757 | case (EDEADLK): |
4758 | status = nfserr_deadlock; | |
eb76b3fd | 4759 | break; |
3e772463 | 4760 | default: |
fd85b817 | 4761 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4762 | status = nfserrno(err); |
eb76b3fd | 4763 | break; |
1da177e4 | 4764 | } |
1da177e4 | 4765 | out: |
de18643d TM |
4766 | if (filp) |
4767 | fput(filp); | |
64a284d0 | 4768 | if (status && new_state) |
c53530da | 4769 | release_lock_stateid(lock_stp); |
9411b1d4 | 4770 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4771 | if (!cstate->replay_owner) |
4772 | nfs4_unlock_state(); | |
21179d81 JL |
4773 | if (file_lock) |
4774 | locks_free_lock(file_lock); | |
4775 | if (conflock) | |
4776 | locks_free_lock(conflock); | |
1da177e4 LT |
4777 | return status; |
4778 | } | |
4779 | ||
55ef1274 BF |
4780 | /* |
4781 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4782 | * so we do a temporary open here just to get an open file to pass to | |
4783 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4784 | * inode operation.) | |
4785 | */ | |
04da6e9d | 4786 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4787 | { |
4788 | struct file *file; | |
04da6e9d AV |
4789 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4790 | if (!err) { | |
4791 | err = nfserrno(vfs_test_lock(file, lock)); | |
4792 | nfsd_close(file); | |
4793 | } | |
55ef1274 BF |
4794 | return err; |
4795 | } | |
4796 | ||
1da177e4 LT |
4797 | /* |
4798 | * LOCKT operation | |
4799 | */ | |
b37ad28b | 4800 | __be32 |
ca364317 BF |
4801 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4802 | struct nfsd4_lockt *lockt) | |
1da177e4 | 4803 | { |
21179d81 | 4804 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4805 | struct nfs4_lockowner *lo; |
b37ad28b | 4806 | __be32 status; |
7f2210fa | 4807 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4808 | |
5ccb0066 | 4809 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4810 | return nfserr_grace; |
4811 | ||
4812 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4813 | return nfserr_inval; | |
4814 | ||
1da177e4 LT |
4815 | nfs4_lock_state(); |
4816 | ||
9b2ef62b | 4817 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 4818 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
4819 | if (status) |
4820 | goto out; | |
4821 | } | |
1da177e4 | 4822 | |
75c096f7 | 4823 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4824 | goto out; |
1da177e4 | 4825 | |
21179d81 JL |
4826 | file_lock = locks_alloc_lock(); |
4827 | if (!file_lock) { | |
4828 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4829 | status = nfserr_jukebox; | |
4830 | goto out; | |
4831 | } | |
4832 | locks_init_lock(file_lock); | |
1da177e4 LT |
4833 | switch (lockt->lt_type) { |
4834 | case NFS4_READ_LT: | |
4835 | case NFS4_READW_LT: | |
21179d81 | 4836 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4837 | break; |
4838 | case NFS4_WRITE_LT: | |
4839 | case NFS4_WRITEW_LT: | |
21179d81 | 4840 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4841 | break; |
4842 | default: | |
2fdada03 | 4843 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4844 | status = nfserr_inval; |
4845 | goto out; | |
4846 | } | |
4847 | ||
b3c32bcd | 4848 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4849 | if (lo) |
21179d81 JL |
4850 | file_lock->fl_owner = (fl_owner_t)lo; |
4851 | file_lock->fl_pid = current->tgid; | |
4852 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4853 | |
21179d81 JL |
4854 | file_lock->fl_start = lockt->lt_offset; |
4855 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4856 | |
21179d81 | 4857 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4858 | |
21179d81 | 4859 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4860 | if (status) |
fd85b817 | 4861 | goto out; |
04da6e9d | 4862 | |
21179d81 | 4863 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4864 | status = nfserr_denied; |
21179d81 | 4865 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4866 | } |
4867 | out: | |
4868 | nfs4_unlock_state(); | |
21179d81 JL |
4869 | if (file_lock) |
4870 | locks_free_lock(file_lock); | |
1da177e4 LT |
4871 | return status; |
4872 | } | |
4873 | ||
b37ad28b | 4874 | __be32 |
ca364317 | 4875 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4876 | struct nfsd4_locku *locku) |
1da177e4 | 4877 | { |
dcef0413 | 4878 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4879 | struct file *filp = NULL; |
21179d81 | 4880 | struct file_lock *file_lock = NULL; |
b37ad28b | 4881 | __be32 status; |
b8dd7b9a | 4882 | int err; |
3320fef1 SK |
4883 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4884 | ||
1da177e4 LT |
4885 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4886 | (long long) locku->lu_offset, | |
4887 | (long long) locku->lu_length); | |
4888 | ||
4889 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4890 | return nfserr_inval; | |
4891 | ||
4892 | nfs4_lock_state(); | |
4893 | ||
9072d5c6 | 4894 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4895 | &locku->lu_stateid, NFS4_LOCK_STID, |
4896 | &stp, nn); | |
9072d5c6 | 4897 | if (status) |
1da177e4 | 4898 | goto out; |
f9d7562f BF |
4899 | filp = find_any_file(stp->st_file); |
4900 | if (!filp) { | |
4901 | status = nfserr_lock_range; | |
4902 | goto out; | |
4903 | } | |
21179d81 JL |
4904 | file_lock = locks_alloc_lock(); |
4905 | if (!file_lock) { | |
4906 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4907 | status = nfserr_jukebox; | |
de18643d | 4908 | goto fput; |
21179d81 JL |
4909 | } |
4910 | locks_init_lock(file_lock); | |
4911 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4912 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4913 | file_lock->fl_pid = current->tgid; |
4914 | file_lock->fl_file = filp; | |
4915 | file_lock->fl_flags = FL_POSIX; | |
4916 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4917 | file_lock->fl_start = locku->lu_offset; | |
4918 | ||
4919 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4920 | locku->lu_length); | |
4921 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4922 | |
21179d81 | 4923 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4924 | if (err) { |
fd85b817 | 4925 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4926 | goto out_nfserr; |
4927 | } | |
dcef0413 BF |
4928 | update_stateid(&stp->st_stid.sc_stateid); |
4929 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
4930 | fput: |
4931 | fput(filp); | |
1da177e4 | 4932 | out: |
9411b1d4 | 4933 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4934 | if (!cstate->replay_owner) |
4935 | nfs4_unlock_state(); | |
21179d81 JL |
4936 | if (file_lock) |
4937 | locks_free_lock(file_lock); | |
1da177e4 LT |
4938 | return status; |
4939 | ||
4940 | out_nfserr: | |
b8dd7b9a | 4941 | status = nfserrno(err); |
de18643d | 4942 | goto fput; |
1da177e4 LT |
4943 | } |
4944 | ||
4945 | /* | |
4946 | * returns | |
4947 | * 1: locks held by lockowner | |
4948 | * 0: no locks held by lockowner | |
4949 | */ | |
4950 | static int | |
fe0750e5 | 4951 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4952 | { |
4953 | struct file_lock **flpp; | |
f9d7562f | 4954 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4955 | int status = 0; |
4956 | ||
1c8c601a | 4957 | spin_lock(&inode->i_lock); |
1da177e4 | 4958 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4959 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4960 | status = 1; |
4961 | goto out; | |
796dadfd | 4962 | } |
1da177e4 LT |
4963 | } |
4964 | out: | |
1c8c601a | 4965 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4966 | return status; |
4967 | } | |
4968 | ||
b37ad28b | 4969 | __be32 |
b591480b BF |
4970 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4971 | struct nfsd4_compound_state *cstate, | |
4972 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4973 | { |
4974 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 4975 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 4976 | struct nfs4_lockowner *lo; |
dcef0413 | 4977 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4978 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 4979 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4980 | __be32 status; |
7f2210fa | 4981 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4982 | |
4983 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4984 | clid->cl_boot, clid->cl_id); | |
4985 | ||
1da177e4 LT |
4986 | nfs4_lock_state(); |
4987 | ||
4b24ca7d | 4988 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
4989 | if (status) |
4990 | goto out; | |
4991 | ||
3e9e3dbe | 4992 | status = nfserr_locks_held; |
06f1f864 | 4993 | |
fd44907c JL |
4994 | /* Find the matching lock stateowner */ |
4995 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
4996 | if (tmp->so_is_open_owner) | |
06f1f864 | 4997 | continue; |
fd44907c JL |
4998 | if (same_owner_str(tmp, owner, clid)) { |
4999 | sop = tmp; | |
5000 | break; | |
1da177e4 | 5001 | } |
3e9e3dbe | 5002 | } |
fd44907c JL |
5003 | |
5004 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
5005 | if (!sop) { | |
5006 | status = nfs_ok; | |
5007 | goto out; | |
5008 | } | |
5009 | ||
5010 | lo = lockowner(sop); | |
5011 | /* see if there are still any locks associated with it */ | |
5012 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5013 | if (check_for_locks(stp->st_file, lo)) | |
5014 | goto out; | |
1da177e4 | 5015 | } |
fd44907c JL |
5016 | |
5017 | status = nfs_ok; | |
5018 | release_lockowner(lo); | |
1da177e4 LT |
5019 | out: |
5020 | nfs4_unlock_state(); | |
5021 | return status; | |
5022 | } | |
5023 | ||
5024 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5025 | alloc_reclaim(void) |
1da177e4 | 5026 | { |
a55370a3 | 5027 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5028 | } |
5029 | ||
0ce0c2b5 | 5030 | bool |
52e19c09 | 5031 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5032 | { |
0ce0c2b5 | 5033 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5034 | |
52e19c09 | 5035 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5036 | return (crp && crp->cr_clp); |
c7b9a459 N |
5037 | } |
5038 | ||
1da177e4 LT |
5039 | /* |
5040 | * failure => all reset bets are off, nfserr_no_grace... | |
5041 | */ | |
772a9bbb | 5042 | struct nfs4_client_reclaim * |
52e19c09 | 5043 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5044 | { |
5045 | unsigned int strhashval; | |
772a9bbb | 5046 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5047 | |
a55370a3 N |
5048 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5049 | crp = alloc_reclaim(); | |
772a9bbb JL |
5050 | if (crp) { |
5051 | strhashval = clientstr_hashval(name); | |
5052 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5053 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5054 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5055 | crp->cr_clp = NULL; |
52e19c09 | 5056 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5057 | } |
5058 | return crp; | |
1da177e4 LT |
5059 | } |
5060 | ||
ce30e539 | 5061 | void |
52e19c09 | 5062 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5063 | { |
5064 | list_del(&crp->cr_strhash); | |
5065 | kfree(crp); | |
52e19c09 | 5066 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5067 | } |
5068 | ||
2a4317c5 | 5069 | void |
52e19c09 | 5070 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5071 | { |
5072 | struct nfs4_client_reclaim *crp = NULL; | |
5073 | int i; | |
5074 | ||
1da177e4 | 5075 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5076 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5077 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5078 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5079 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5080 | } |
5081 | } | |
063b0fb9 | 5082 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5083 | } |
5084 | ||
5085 | /* | |
5086 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5087 | struct nfs4_client_reclaim * |
52e19c09 | 5088 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5089 | { |
5090 | unsigned int strhashval; | |
1da177e4 LT |
5091 | struct nfs4_client_reclaim *crp = NULL; |
5092 | ||
278c931c | 5093 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5094 | |
278c931c | 5095 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5096 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5097 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5098 | return crp; |
5099 | } | |
5100 | } | |
5101 | return NULL; | |
5102 | } | |
5103 | ||
5104 | /* | |
5105 | * Called from OPEN. Look for clientid in reclaim list. | |
5106 | */ | |
b37ad28b | 5107 | __be32 |
0fe492db TM |
5108 | nfs4_check_open_reclaim(clientid_t *clid, |
5109 | struct nfsd4_compound_state *cstate, | |
5110 | struct nfsd_net *nn) | |
1da177e4 | 5111 | { |
0fe492db | 5112 | __be32 status; |
a52d726b JL |
5113 | |
5114 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5115 | status = lookup_clientid(clid, cstate, nn); |
5116 | if (status) | |
a52d726b JL |
5117 | return nfserr_reclaim_bad; |
5118 | ||
0fe492db TM |
5119 | if (nfsd4_client_record_check(cstate->clp)) |
5120 | return nfserr_reclaim_bad; | |
5121 | ||
5122 | return nfs_ok; | |
1da177e4 LT |
5123 | } |
5124 | ||
65178db4 BS |
5125 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5126 | ||
44e34da6 BS |
5127 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5128 | { | |
221a6876 BF |
5129 | if (mark_client_expired(clp)) |
5130 | return 0; | |
44e34da6 BS |
5131 | expire_client(clp); |
5132 | return 1; | |
5133 | } | |
5134 | ||
184c1847 BS |
5135 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5136 | { | |
5137 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5138 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5139 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5140 | return 1; | |
5141 | } | |
5142 | ||
5143 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5144 | const char *type) | |
5145 | { | |
5146 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5147 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5148 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5149 | } | |
5150 | ||
3c87b9b7 TM |
5151 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5152 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5153 | { |
5154 | struct nfs4_openowner *oop; | |
fc29171f | 5155 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5156 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5157 | u64 count = 0; |
5158 | ||
5159 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5160 | list_for_each_entry_safe(stp, st_next, |
5161 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5162 | list_for_each_entry_safe(lst, lst_next, | |
5163 | &stp->st_locks, st_locks) { | |
fc29171f | 5164 | if (func) |
3c87b9b7 | 5165 | func(lst); |
fc29171f BS |
5166 | if (++count == max) |
5167 | return count; | |
5168 | } | |
5169 | } | |
5170 | } | |
5171 | ||
5172 | return count; | |
5173 | } | |
5174 | ||
5175 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5176 | { | |
3c87b9b7 | 5177 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5178 | } |
5179 | ||
184c1847 BS |
5180 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5181 | { | |
5182 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5183 | nfsd_print_count(clp, count, "locked files"); | |
5184 | return count; | |
5185 | } | |
5186 | ||
4dbdbda8 BS |
5187 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5188 | { | |
5189 | struct nfs4_openowner *oop, *next; | |
5190 | u64 count = 0; | |
5191 | ||
5192 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5193 | if (func) | |
5194 | func(oop); | |
5195 | if (++count == max) | |
5196 | break; | |
5197 | } | |
5198 | ||
5199 | return count; | |
5200 | } | |
5201 | ||
5202 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5203 | { | |
5204 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5205 | } | |
5206 | ||
184c1847 BS |
5207 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5208 | { | |
5209 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5210 | nfsd_print_count(clp, count, "open files"); | |
5211 | return count; | |
5212 | } | |
5213 | ||
269de30f BS |
5214 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5215 | struct list_head *victims) | |
5216 | { | |
5217 | struct nfs4_delegation *dp, *next; | |
5218 | u64 count = 0; | |
5219 | ||
cdc97505 | 5220 | lockdep_assert_held(&state_lock); |
269de30f | 5221 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5222 | if (victims) { |
5223 | /* | |
5224 | * It's not safe to mess with delegations that have a | |
5225 | * non-zero dl_time. They might have already been broken | |
5226 | * and could be processed by the laundromat outside of | |
5227 | * the state_lock. Just leave them be. | |
5228 | */ | |
5229 | if (dp->dl_time != 0) | |
5230 | continue; | |
5231 | ||
5232 | /* | |
5233 | * Increment dl_time to ensure that delegation breaks | |
5234 | * don't monkey with it now that we are. | |
5235 | */ | |
5236 | ++dp->dl_time; | |
269de30f | 5237 | list_move(&dp->dl_recall_lru, victims); |
dff1399f | 5238 | } |
269de30f BS |
5239 | if (++count == max) |
5240 | break; | |
5241 | } | |
5242 | return count; | |
5243 | } | |
5244 | ||
5245 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5246 | { | |
5247 | struct nfs4_delegation *dp, *next; | |
5248 | LIST_HEAD(victims); | |
5249 | u64 count; | |
5250 | ||
cdc97505 | 5251 | spin_lock(&state_lock); |
269de30f | 5252 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5253 | spin_unlock(&state_lock); |
269de30f BS |
5254 | |
5255 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 5256 | revoke_delegation(dp); |
269de30f BS |
5257 | |
5258 | return count; | |
5259 | } | |
5260 | ||
5261 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5262 | { | |
dff1399f | 5263 | struct nfs4_delegation *dp; |
269de30f BS |
5264 | LIST_HEAD(victims); |
5265 | u64 count; | |
5266 | ||
cdc97505 | 5267 | spin_lock(&state_lock); |
269de30f | 5268 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5269 | while (!list_empty(&victims)) { |
5270 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5271 | dl_recall_lru); | |
5272 | list_del_init(&dp->dl_recall_lru); | |
5273 | dp->dl_time = 0; | |
269de30f | 5274 | nfsd_break_one_deleg(dp); |
dff1399f | 5275 | } |
cdc97505 | 5276 | spin_unlock(&state_lock); |
269de30f BS |
5277 | |
5278 | return count; | |
5279 | } | |
5280 | ||
184c1847 BS |
5281 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5282 | { | |
5283 | u64 count = 0; | |
5284 | ||
cdc97505 | 5285 | spin_lock(&state_lock); |
184c1847 | 5286 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5287 | spin_unlock(&state_lock); |
184c1847 BS |
5288 | |
5289 | nfsd_print_count(clp, count, "delegations"); | |
5290 | return count; | |
5291 | } | |
5292 | ||
44e34da6 | 5293 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5294 | { |
5295 | struct nfs4_client *clp, *next; | |
44e34da6 | 5296 | u64 count = 0; |
3320fef1 | 5297 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5298 | |
44e34da6 BS |
5299 | if (!nfsd_netns_ready(nn)) |
5300 | return 0; | |
5301 | ||
5ed58bb2 | 5302 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5303 | count += func(clp, max - count); |
5304 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5305 | break; |
5306 | } | |
65178db4 | 5307 | |
44e34da6 BS |
5308 | return count; |
5309 | } | |
5310 | ||
6c1e82a4 BS |
5311 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5312 | { | |
5313 | struct nfs4_client *clp; | |
5314 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5315 | ||
5316 | if (!nfsd_netns_ready(nn)) | |
5317 | return NULL; | |
5318 | ||
5319 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5320 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5321 | return clp; | |
5322 | } | |
5323 | return NULL; | |
5324 | } | |
5325 | ||
65178db4 BS |
5326 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5327 | ||
c2f1a551 MS |
5328 | /* |
5329 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5330 | * client may quite reasonably hang on to a delegation as long as it has | |
5331 | * the inode cached. This becomes an obvious problem the first time a | |
5332 | * client's inode cache approaches the size of the server's total memory. | |
5333 | * | |
5334 | * For now we avoid this problem by imposing a hard limit on the number | |
5335 | * of delegations, which varies according to the server's memory size. | |
5336 | */ | |
5337 | static void | |
5338 | set_max_delegations(void) | |
5339 | { | |
5340 | /* | |
5341 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5342 | * estimates suggest that in the worst case (where every delegation | |
5343 | * is for a different inode), a delegation could take about 1.5K, | |
5344 | * giving a worst case usage of about 6% of memory. | |
5345 | */ | |
5346 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5347 | } | |
5348 | ||
d85ed443 | 5349 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5350 | { |
5351 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5352 | int i; | |
5353 | ||
5354 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5355 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5356 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5357 | goto err; |
0a7ec377 SK |
5358 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5359 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5360 | if (!nn->unconf_id_hashtbl) | |
5361 | goto err_unconf_id; | |
9b531137 SK |
5362 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5363 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5364 | if (!nn->ownerstr_hashtbl) | |
5365 | goto err_ownerstr; | |
1872de0e SK |
5366 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5367 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5368 | if (!nn->sessionid_hashtbl) | |
5369 | goto err_sessionid; | |
8daae4dc | 5370 | |
382a62e7 | 5371 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5372 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5373 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5374 | } |
9b531137 SK |
5375 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5376 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5377 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5378 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5379 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5380 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5381 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5382 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5383 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5384 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5385 | |
09121281 | 5386 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5387 | get_net(net); |
09121281 | 5388 | |
8daae4dc | 5389 | return 0; |
382a62e7 | 5390 | |
1872de0e | 5391 | err_sessionid: |
20e9e2bc | 5392 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5393 | err_ownerstr: |
5394 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5395 | err_unconf_id: |
5396 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5397 | err: |
5398 | return -ENOMEM; | |
8daae4dc SK |
5399 | } |
5400 | ||
5401 | static void | |
4dce0ac9 | 5402 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5403 | { |
5404 | int i; | |
5405 | struct nfs4_client *clp = NULL; | |
5406 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5407 | ||
5408 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5409 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5410 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5411 | destroy_client(clp); | |
5412 | } | |
5413 | } | |
a99454aa | 5414 | |
2b905635 KM |
5415 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5416 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5417 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5418 | destroy_client(clp); | |
5419 | } | |
a99454aa SK |
5420 | } |
5421 | ||
1872de0e | 5422 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5423 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5424 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5425 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5426 | put_net(net); |
8daae4dc SK |
5427 | } |
5428 | ||
f252bc68 | 5429 | int |
d85ed443 | 5430 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5431 | { |
5e1533c7 | 5432 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5433 | int ret; |
5434 | ||
d85ed443 | 5435 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5436 | if (ret) |
5437 | return ret; | |
5e1533c7 | 5438 | nfsd4_client_tracking_init(net); |
2c142baa | 5439 | nn->boot_time = get_seconds(); |
5ccb0066 | 5440 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5441 | nn->grace_ended = false; |
d85ed443 | 5442 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5443 | nn->nfsd4_grace, net); |
5444 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5445 | return 0; |
5446 | } | |
5447 | ||
5448 | /* initialization to perform when the nfsd service is started: */ | |
5449 | ||
5450 | int | |
5451 | nfs4_state_start(void) | |
5452 | { | |
5453 | int ret; | |
5454 | ||
b5a1a81e | 5455 | ret = set_callback_cred(); |
d85ed443 SK |
5456 | if (ret) |
5457 | return -ENOMEM; | |
58da282b | 5458 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5459 | if (laundry_wq == NULL) { |
5460 | ret = -ENOMEM; | |
5461 | goto out_recovery; | |
5462 | } | |
b5a1a81e BF |
5463 | ret = nfsd4_create_callback_queue(); |
5464 | if (ret) | |
5465 | goto out_free_laundry; | |
09121281 | 5466 | |
c2f1a551 | 5467 | set_max_delegations(); |
d85ed443 | 5468 | |
b5a1a81e | 5469 | return 0; |
d85ed443 | 5470 | |
b5a1a81e BF |
5471 | out_free_laundry: |
5472 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5473 | out_recovery: |
b5a1a81e | 5474 | return ret; |
1da177e4 LT |
5475 | } |
5476 | ||
f252bc68 | 5477 | void |
4dce0ac9 | 5478 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5479 | { |
1da177e4 | 5480 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5481 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5482 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5483 | |
4dce0ac9 SK |
5484 | cancel_delayed_work_sync(&nn->laundromat_work); |
5485 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5486 | |
e50a26dc | 5487 | nfs4_lock_state(); |
1da177e4 | 5488 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5489 | spin_lock(&state_lock); |
e8c69d17 | 5490 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5491 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5492 | list_move(&dp->dl_recall_lru, &reaplist); | |
5493 | } | |
cdc97505 | 5494 | spin_unlock(&state_lock); |
1da177e4 LT |
5495 | list_for_each_safe(pos, next, &reaplist) { |
5496 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5497 | destroy_delegation(dp); |
1da177e4 LT |
5498 | } |
5499 | ||
3320fef1 | 5500 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5501 | nfs4_state_destroy_net(net); |
e50a26dc | 5502 | nfs4_unlock_state(); |
1da177e4 LT |
5503 | } |
5504 | ||
5505 | void | |
5506 | nfs4_state_shutdown(void) | |
5507 | { | |
5e8d5c29 | 5508 | destroy_workqueue(laundry_wq); |
c3935e30 | 5509 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5510 | } |
8b70484c TM |
5511 | |
5512 | static void | |
5513 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5514 | { | |
37c593c5 TM |
5515 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5516 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5517 | } |
5518 | ||
5519 | static void | |
5520 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5521 | { | |
37c593c5 TM |
5522 | if (cstate->minorversion) { |
5523 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5524 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5525 | } | |
5526 | } | |
5527 | ||
5528 | void | |
5529 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5530 | { | |
5531 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5532 | } |
5533 | ||
62cd4a59 TM |
5534 | /* |
5535 | * functions to set current state id | |
5536 | */ | |
9428fe1a TM |
5537 | void |
5538 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5539 | { | |
5540 | put_stateid(cstate, &odp->od_stateid); | |
5541 | } | |
5542 | ||
8b70484c TM |
5543 | void |
5544 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5545 | { | |
5546 | put_stateid(cstate, &open->op_stateid); | |
5547 | } | |
5548 | ||
62cd4a59 TM |
5549 | void |
5550 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5551 | { | |
5552 | put_stateid(cstate, &close->cl_stateid); | |
5553 | } | |
5554 | ||
5555 | void | |
5556 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5557 | { | |
5558 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5559 | } | |
5560 | ||
5561 | /* | |
5562 | * functions to consume current state id | |
5563 | */ | |
1e97b519 | 5564 | |
9428fe1a TM |
5565 | void |
5566 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5567 | { | |
5568 | get_stateid(cstate, &odp->od_stateid); | |
5569 | } | |
5570 | ||
5571 | void | |
5572 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5573 | { | |
5574 | get_stateid(cstate, &drp->dr_stateid); | |
5575 | } | |
5576 | ||
1e97b519 TM |
5577 | void |
5578 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5579 | { | |
5580 | get_stateid(cstate, &fsp->fr_stateid); | |
5581 | } | |
5582 | ||
5583 | void | |
5584 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5585 | { | |
5586 | get_stateid(cstate, &setattr->sa_stateid); | |
5587 | } | |
5588 | ||
8b70484c TM |
5589 | void |
5590 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5591 | { | |
5592 | get_stateid(cstate, &close->cl_stateid); | |
5593 | } | |
5594 | ||
5595 | void | |
62cd4a59 | 5596 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5597 | { |
62cd4a59 | 5598 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5599 | } |
30813e27 TM |
5600 | |
5601 | void | |
5602 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5603 | { | |
5604 | get_stateid(cstate, &read->rd_stateid); | |
5605 | } | |
5606 | ||
5607 | void | |
5608 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5609 | { | |
5610 | get_stateid(cstate, &write->wr_stateid); | |
5611 | } |