Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
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 | ||
de18643d | 397 | static struct file *nfs4_file_put_fd(struct nfs4_file *fp, int oflag) |
f9d7562f | 398 | { |
de18643d TM |
399 | struct file *filp; |
400 | ||
401 | filp = fp->fi_fds[oflag]; | |
402 | fp->fi_fds[oflag] = NULL; | |
403 | return filp; | |
f9d7562f BF |
404 | } |
405 | ||
998db52c | 406 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 407 | { |
de18643d TM |
408 | might_lock(&fp->fi_lock); |
409 | ||
410 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
411 | struct file *f1 = NULL; | |
412 | struct file *f2 = NULL; | |
413 | ||
414 | f1 = nfs4_file_put_fd(fp, oflag); | |
0c7c3e67 | 415 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
de18643d TM |
416 | f2 = nfs4_file_put_fd(fp, O_RDWR); |
417 | spin_unlock(&fp->fi_lock); | |
418 | if (f1) | |
419 | fput(f1); | |
420 | if (f2) | |
421 | fput(f2); | |
f9d7562f BF |
422 | } |
423 | } | |
424 | ||
12659651 | 425 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 426 | { |
12659651 JL |
427 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
428 | ||
429 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 430 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
431 | if (access & NFS4_SHARE_ACCESS_READ) |
432 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
433 | } |
434 | ||
3abdb607 BF |
435 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
436 | kmem_cache *slab) | |
2a74aba7 | 437 | { |
3abdb607 | 438 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 439 | struct nfs4_stid *stid; |
6136d2b4 | 440 | int new_id; |
2a74aba7 | 441 | |
3abdb607 BF |
442 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
443 | if (!stid) | |
444 | return NULL; | |
445 | ||
398c33aa | 446 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 447 | if (new_id < 0) |
3abdb607 | 448 | goto out_free; |
2a74aba7 | 449 | stid->sc_client = cl; |
3abdb607 BF |
450 | stid->sc_type = 0; |
451 | stid->sc_stateid.si_opaque.so_id = new_id; | |
452 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 453 | /* Will be incremented before return to client: */ |
3abdb607 | 454 | stid->sc_stateid.si_generation = 0; |
996e0938 | 455 | |
996e0938 | 456 | /* |
3abdb607 BF |
457 | * It shouldn't be a problem to reuse an opaque stateid value. |
458 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
459 | * example, a stray write retransmission could be accepted by | |
460 | * the server when it should have been rejected. Therefore, | |
461 | * adopt a trick from the sctp code to attempt to maximize the | |
462 | * amount of time until an id is reused, by ensuring they always | |
463 | * "increase" (mod INT_MAX): | |
996e0938 | 464 | */ |
3abdb607 BF |
465 | return stid; |
466 | out_free: | |
2c44a234 | 467 | kmem_cache_free(slab, stid); |
3abdb607 | 468 | return NULL; |
2a74aba7 BF |
469 | } |
470 | ||
4cdc951b BF |
471 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
472 | { | |
473 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
474 | } | |
475 | ||
6282cd56 N |
476 | /* |
477 | * When we recall a delegation, we should be careful not to hand it | |
478 | * out again straight away. | |
479 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
480 | * in which the filehandles of recalled delegations are "stored". | |
481 | * If a filehandle appear in either filter, a delegation is blocked. | |
482 | * When a delegation is recalled, the filehandle is stored in the "new" | |
483 | * filter. | |
484 | * Every 30 seconds we swap the filters and clear the "new" one, | |
485 | * unless both are empty of course. | |
486 | * | |
487 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
488 | * low 3 bytes as hash-table indices. | |
489 | * | |
490 | * 'state_lock', which is always held when block_delegations() is called, | |
491 | * is used to manage concurrent access. Testing does not need the lock | |
492 | * except when swapping the two filters. | |
493 | */ | |
494 | static struct bloom_pair { | |
495 | int entries, old_entries; | |
496 | time_t swap_time; | |
497 | int new; /* index into 'set' */ | |
498 | DECLARE_BITMAP(set[2], 256); | |
499 | } blocked_delegations; | |
500 | ||
501 | static int delegation_blocked(struct knfsd_fh *fh) | |
502 | { | |
503 | u32 hash; | |
504 | struct bloom_pair *bd = &blocked_delegations; | |
505 | ||
506 | if (bd->entries == 0) | |
507 | return 0; | |
508 | if (seconds_since_boot() - bd->swap_time > 30) { | |
509 | spin_lock(&state_lock); | |
510 | if (seconds_since_boot() - bd->swap_time > 30) { | |
511 | bd->entries -= bd->old_entries; | |
512 | bd->old_entries = bd->entries; | |
513 | memset(bd->set[bd->new], 0, | |
514 | sizeof(bd->set[0])); | |
515 | bd->new = 1-bd->new; | |
516 | bd->swap_time = seconds_since_boot(); | |
517 | } | |
518 | spin_unlock(&state_lock); | |
519 | } | |
520 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
521 | if (test_bit(hash&255, bd->set[0]) && | |
522 | test_bit((hash>>8)&255, bd->set[0]) && | |
523 | test_bit((hash>>16)&255, bd->set[0])) | |
524 | return 1; | |
525 | ||
526 | if (test_bit(hash&255, bd->set[1]) && | |
527 | test_bit((hash>>8)&255, bd->set[1]) && | |
528 | test_bit((hash>>16)&255, bd->set[1])) | |
529 | return 1; | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | static void block_delegations(struct knfsd_fh *fh) | |
535 | { | |
536 | u32 hash; | |
537 | struct bloom_pair *bd = &blocked_delegations; | |
538 | ||
539 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
540 | ||
541 | __set_bit(hash&255, bd->set[bd->new]); | |
542 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
543 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
544 | if (bd->entries == 0) | |
545 | bd->swap_time = seconds_since_boot(); | |
546 | bd->entries += 1; | |
547 | } | |
548 | ||
1da177e4 | 549 | static struct nfs4_delegation * |
99c41515 | 550 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
551 | { |
552 | struct nfs4_delegation *dp; | |
1da177e4 LT |
553 | |
554 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 555 | if (num_delegations > max_delegations) |
ef0f3390 | 556 | return NULL; |
6282cd56 N |
557 | if (delegation_blocked(¤t_fh->fh_handle)) |
558 | return NULL; | |
996e0938 | 559 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 560 | if (dp == NULL) |
1da177e4 | 561 | return dp; |
2a74aba7 BF |
562 | /* |
563 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
564 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
565 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
566 | */ |
567 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 568 | num_delegations++; |
ea1da636 N |
569 | INIT_LIST_HEAD(&dp->dl_perfile); |
570 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 571 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 572 | dp->dl_file = NULL; |
99c41515 | 573 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 574 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
575 | dp->dl_time = 0; |
576 | atomic_set(&dp->dl_count, 1); | |
57725155 | 577 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
578 | return dp; |
579 | } | |
580 | ||
68a33961 | 581 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
582 | { |
583 | struct idr *stateids = &s->sc_client->cl_stateids; | |
584 | ||
585 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
586 | } |
587 | ||
9857df81 BH |
588 | static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) |
589 | { | |
590 | kmem_cache_free(slab, s); | |
591 | } | |
592 | ||
1da177e4 LT |
593 | void |
594 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
595 | { | |
596 | if (atomic_dec_and_test(&dp->dl_count)) { | |
9857df81 | 597 | nfs4_free_stid(deleg_slab, &dp->dl_stid); |
ef0f3390 | 598 | num_delegations--; |
1da177e4 LT |
599 | } |
600 | } | |
601 | ||
acfdf5c3 | 602 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 603 | { |
cbf7a75b BF |
604 | if (!fp->fi_lease) |
605 | return; | |
acfdf5c3 BF |
606 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
607 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
608 | fp->fi_lease = NULL; | |
4ee63624 | 609 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
610 | fp->fi_deleg_file = NULL; |
611 | } | |
1da177e4 LT |
612 | } |
613 | ||
6136d2b4 BF |
614 | static void unhash_stid(struct nfs4_stid *s) |
615 | { | |
3abdb607 | 616 | s->sc_type = 0; |
6136d2b4 BF |
617 | } |
618 | ||
931ee56c BH |
619 | static void |
620 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
621 | { | |
cdc97505 | 622 | lockdep_assert_held(&state_lock); |
931ee56c | 623 | |
3fb87d13 | 624 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
625 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
626 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
627 | } | |
628 | ||
1da177e4 LT |
629 | /* Called under the state lock. */ |
630 | static void | |
631 | unhash_delegation(struct nfs4_delegation *dp) | |
632 | { | |
cdc97505 | 633 | spin_lock(&state_lock); |
931ee56c | 634 | list_del_init(&dp->dl_perclnt); |
5d926e8c | 635 | list_del_init(&dp->dl_perfile); |
1da177e4 | 636 | list_del_init(&dp->dl_recall_lru); |
cdc97505 | 637 | spin_unlock(&state_lock); |
cbf7a75b BF |
638 | if (dp->dl_file) { |
639 | nfs4_put_deleg_lease(dp->dl_file); | |
640 | put_nfs4_file(dp->dl_file); | |
641 | dp->dl_file = NULL; | |
642 | } | |
3bd64a5b BF |
643 | } |
644 | ||
645 | ||
646 | ||
647 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
648 | { | |
649 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 650 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
651 | nfs4_put_delegation(dp); |
652 | } | |
653 | ||
3bd64a5b BF |
654 | static void destroy_delegation(struct nfs4_delegation *dp) |
655 | { | |
656 | unhash_delegation(dp); | |
657 | remove_stid(&dp->dl_stid); | |
658 | nfs4_put_delegation(dp); | |
659 | } | |
660 | ||
661 | static void revoke_delegation(struct nfs4_delegation *dp) | |
662 | { | |
663 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
664 | ||
665 | if (clp->cl_minorversion == 0) | |
666 | destroy_delegation(dp); | |
667 | else { | |
668 | unhash_delegation(dp); | |
669 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
670 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
671 | } | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* |
675 | * SETCLIENTID state | |
676 | */ | |
677 | ||
ddc04c41 BF |
678 | static unsigned int clientid_hashval(u32 id) |
679 | { | |
680 | return id & CLIENT_HASH_MASK; | |
681 | } | |
682 | ||
683 | static unsigned int clientstr_hashval(const char *name) | |
684 | { | |
685 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
686 | } | |
687 | ||
f9d7562f BF |
688 | /* |
689 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
690 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
691 | * only what share bits are currently in force, but also what | |
692 | * combinations of share bits previous opens have used. This allows us | |
693 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
694 | * return an error if the client attempt to downgrade to a combination | |
695 | * of share bits not explicable by closing some of its previous opens. | |
696 | * | |
697 | * XXX: This enforcement is actually incomplete, since we don't keep | |
698 | * track of access/deny bit combinations; so, e.g., we allow: | |
699 | * | |
700 | * OPEN allow read, deny write | |
701 | * OPEN allow both, deny none | |
702 | * DOWNGRADE allow read, deny none | |
703 | * | |
704 | * which we should reject. | |
705 | */ | |
5ae037e5 JL |
706 | static unsigned int |
707 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 708 | int i; |
5ae037e5 | 709 | unsigned int access = 0; |
f9d7562f | 710 | |
f9d7562f BF |
711 | for (i = 1; i < 4; i++) { |
712 | if (test_bit(i, &bmap)) | |
5ae037e5 | 713 | access |= i; |
f9d7562f | 714 | } |
5ae037e5 | 715 | return access; |
f9d7562f BF |
716 | } |
717 | ||
3a328614 | 718 | static bool |
dcef0413 | 719 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
720 | unsigned int access, deny; |
721 | ||
5ae037e5 JL |
722 | access = bmap_to_share_mode(stp->st_access_bmap); |
723 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 724 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
725 | return false; |
726 | return true; | |
f9d7562f BF |
727 | } |
728 | ||
82c5ff1b JL |
729 | /* set share access for a given stateid */ |
730 | static inline void | |
731 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
732 | { | |
733 | __set_bit(access, &stp->st_access_bmap); | |
734 | } | |
735 | ||
736 | /* clear share access for a given stateid */ | |
737 | static inline void | |
738 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
739 | { | |
740 | __clear_bit(access, &stp->st_access_bmap); | |
741 | } | |
742 | ||
743 | /* test whether a given stateid has access */ | |
744 | static inline bool | |
745 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
746 | { | |
747 | return test_bit(access, &stp->st_access_bmap); | |
748 | } | |
749 | ||
ce0fc43c JL |
750 | /* set share deny for a given stateid */ |
751 | static inline void | |
752 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
753 | { | |
754 | __set_bit(access, &stp->st_deny_bmap); | |
755 | } | |
756 | ||
757 | /* clear share deny for a given stateid */ | |
758 | static inline void | |
759 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
760 | { | |
761 | __clear_bit(access, &stp->st_deny_bmap); | |
762 | } | |
763 | ||
764 | /* test whether a given stateid is denying specific access */ | |
765 | static inline bool | |
766 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
767 | { | |
768 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
769 | } |
770 | ||
771 | static int nfs4_access_to_omode(u32 access) | |
772 | { | |
8f34a430 | 773 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
774 | case NFS4_SHARE_ACCESS_READ: |
775 | return O_RDONLY; | |
776 | case NFS4_SHARE_ACCESS_WRITE: | |
777 | return O_WRONLY; | |
778 | case NFS4_SHARE_ACCESS_BOTH: | |
779 | return O_RDWR; | |
780 | } | |
063b0fb9 BF |
781 | WARN_ON_ONCE(1); |
782 | return O_RDONLY; | |
f9d7562f BF |
783 | } |
784 | ||
82c5ff1b JL |
785 | /* release all access and file references for a given stateid */ |
786 | static void | |
787 | release_all_access(struct nfs4_ol_stateid *stp) | |
788 | { | |
789 | int i; | |
790 | ||
791 | for (i = 1; i < 4; i++) { | |
792 | if (test_access(i, stp)) | |
12659651 | 793 | nfs4_file_put_access(stp->st_file, i); |
82c5ff1b JL |
794 | clear_access(i, stp); |
795 | } | |
796 | } | |
797 | ||
dcef0413 | 798 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 799 | { |
1d31a253 TM |
800 | struct nfs4_file *fp = stp->st_file; |
801 | ||
802 | spin_lock(&fp->fi_lock); | |
529d7b2a | 803 | list_del(&stp->st_perfile); |
1d31a253 | 804 | spin_unlock(&fp->fi_lock); |
529d7b2a BF |
805 | list_del(&stp->st_perstateowner); |
806 | } | |
807 | ||
dcef0413 | 808 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 809 | { |
82c5ff1b | 810 | release_all_access(stp); |
a96e5b90 | 811 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
812 | stp->st_file = NULL; |
813 | } | |
814 | ||
dcef0413 | 815 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 816 | { |
68a33961 | 817 | remove_stid(&stp->st_stid); |
9857df81 | 818 | nfs4_free_stid(stateid_slab, &stp->st_stid); |
529d7b2a BF |
819 | } |
820 | ||
3c87b9b7 | 821 | static void __release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
822 | { |
823 | struct file *file; | |
824 | ||
3c87b9b7 | 825 | list_del(&stp->st_locks); |
529d7b2a | 826 | unhash_generic_stateid(stp); |
6136d2b4 | 827 | unhash_stid(&stp->st_stid); |
529d7b2a | 828 | file = find_any_file(stp->st_file); |
e20fcf1e TM |
829 | if (file) |
830 | filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner)); | |
38c387b5 | 831 | close_generic_stateid(stp); |
529d7b2a BF |
832 | free_generic_stateid(stp); |
833 | } | |
834 | ||
fe0750e5 | 835 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 836 | { |
dcef0413 | 837 | struct nfs4_ol_stateid *stp; |
529d7b2a | 838 | |
fe0750e5 | 839 | list_del(&lo->lo_owner.so_strhash); |
fe0750e5 BF |
840 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
841 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 842 | struct nfs4_ol_stateid, st_perstateowner); |
3c87b9b7 | 843 | __release_lock_stateid(stp); |
529d7b2a BF |
844 | } |
845 | } | |
846 | ||
50cc6231 TM |
847 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
848 | { | |
849 | kfree(lo->lo_owner.so_owner.data); | |
850 | kmem_cache_free(lockowner_slab, lo); | |
851 | } | |
852 | ||
fe0750e5 | 853 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 854 | { |
fe0750e5 BF |
855 | unhash_lockowner(lo); |
856 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
857 | } |
858 | ||
3c87b9b7 TM |
859 | static void release_lockowner_if_empty(struct nfs4_lockowner *lo) |
860 | { | |
861 | if (list_empty(&lo->lo_owner.so_stateids)) | |
862 | release_lockowner(lo); | |
863 | } | |
864 | ||
865 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
529d7b2a | 866 | { |
fe0750e5 | 867 | struct nfs4_lockowner *lo; |
529d7b2a | 868 | |
3c87b9b7 TM |
869 | lo = lockowner(stp->st_stateowner); |
870 | __release_lock_stateid(stp); | |
871 | release_lockowner_if_empty(lo); | |
872 | } | |
873 | ||
874 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) | |
875 | { | |
876 | struct nfs4_ol_stateid *stp; | |
877 | ||
878 | while (!list_empty(&open_stp->st_locks)) { | |
879 | stp = list_entry(open_stp->st_locks.next, | |
880 | struct nfs4_ol_stateid, st_locks); | |
881 | release_lock_stateid(stp); | |
529d7b2a BF |
882 | } |
883 | } | |
884 | ||
38c387b5 | 885 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
886 | { |
887 | unhash_generic_stateid(stp); | |
3c87b9b7 | 888 | release_open_stateid_locks(stp); |
38c387b5 BF |
889 | close_generic_stateid(stp); |
890 | } | |
891 | ||
892 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
893 | { | |
894 | unhash_open_stateid(stp); | |
2283963f BF |
895 | free_generic_stateid(stp); |
896 | } | |
897 | ||
fe0750e5 | 898 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 899 | { |
dcef0413 | 900 | struct nfs4_ol_stateid *stp; |
f1d110ca | 901 | |
fe0750e5 BF |
902 | list_del(&oo->oo_owner.so_strhash); |
903 | list_del(&oo->oo_perclient); | |
904 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
905 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 906 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 907 | release_open_stateid(stp); |
f1d110ca BF |
908 | } |
909 | } | |
910 | ||
f7a4d872 BF |
911 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
912 | { | |
913 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
914 | ||
915 | if (s) { | |
f7a4d872 BF |
916 | free_generic_stateid(s); |
917 | oo->oo_last_closed_stid = NULL; | |
918 | } | |
919 | } | |
920 | ||
50cc6231 TM |
921 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
922 | { | |
923 | kfree(oo->oo_owner.so_owner.data); | |
924 | kmem_cache_free(openowner_slab, oo); | |
925 | } | |
926 | ||
fe0750e5 | 927 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 928 | { |
fe0750e5 BF |
929 | unhash_openowner(oo); |
930 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 931 | release_last_closed_stateid(oo); |
fe0750e5 | 932 | nfs4_free_openowner(oo); |
f1d110ca BF |
933 | } |
934 | ||
5282fd72 ME |
935 | static inline int |
936 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
937 | { | |
938 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
939 | ||
940 | return sid->sequence % SESSION_HASH_SIZE; | |
941 | } | |
942 | ||
8f199b82 | 943 | #ifdef NFSD_DEBUG |
5282fd72 ME |
944 | static inline void |
945 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
946 | { | |
947 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
948 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
949 | } | |
8f199b82 TM |
950 | #else |
951 | static inline void | |
952 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
953 | { | |
954 | } | |
955 | #endif | |
956 | ||
9411b1d4 BF |
957 | /* |
958 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
959 | * won't be used for replay. | |
960 | */ | |
961 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
962 | { | |
963 | struct nfs4_stateowner *so = cstate->replay_owner; | |
964 | ||
965 | if (nfserr == nfserr_replay_me) | |
966 | return; | |
967 | ||
968 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
969 | cstate->replay_owner = NULL; | |
970 | return; | |
971 | } | |
972 | if (!so) | |
973 | return; | |
974 | if (so->so_is_open_owner) | |
975 | release_last_closed_stateid(openowner(so)); | |
976 | so->so_seqid++; | |
977 | return; | |
978 | } | |
5282fd72 | 979 | |
ec6b5d7b AA |
980 | static void |
981 | gen_sessionid(struct nfsd4_session *ses) | |
982 | { | |
983 | struct nfs4_client *clp = ses->se_client; | |
984 | struct nfsd4_sessionid *sid; | |
985 | ||
986 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
987 | sid->clientid = clp->cl_clientid; | |
988 | sid->sequence = current_sessionid++; | |
989 | sid->reserved = 0; | |
990 | } | |
991 | ||
992 | /* | |
a649637c AA |
993 | * The protocol defines ca_maxresponssize_cached to include the size of |
994 | * the rpc header, but all we need to cache is the data starting after | |
995 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
996 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
997 | * value that is the number of bytes in our cache plus a few additional | |
998 | * bytes. In order to stay on the safe side, and not promise more than | |
999 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1000 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1001 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1002 | * for the SEQUENCE op response: | |
1003 | */ | |
1004 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1005 | ||
557ce264 AA |
1006 | static void |
1007 | free_session_slots(struct nfsd4_session *ses) | |
1008 | { | |
1009 | int i; | |
1010 | ||
1011 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
1012 | kfree(ses->se_slots[i]); | |
1013 | } | |
1014 | ||
a649637c | 1015 | /* |
efe0cb6d BF |
1016 | * We don't actually need to cache the rpc and session headers, so we |
1017 | * can allocate a little less for each slot: | |
1018 | */ | |
55c760cf | 1019 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1020 | { |
55c760cf | 1021 | u32 size; |
efe0cb6d | 1022 | |
55c760cf BF |
1023 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1024 | size = 0; | |
1025 | else | |
1026 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1027 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1028 | } |
ec6b5d7b | 1029 | |
5b6feee9 BF |
1030 | /* |
1031 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1032 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1033 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1034 | */ |
55c760cf | 1035 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 1036 | { |
55c760cf BF |
1037 | u32 slotsize = slot_bytes(ca); |
1038 | u32 num = ca->maxreqs; | |
5b6feee9 | 1039 | int avail; |
ec6b5d7b | 1040 | |
5b6feee9 | 1041 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
1042 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
1043 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
1044 | num = min_t(int, num, avail / slotsize); |
1045 | nfsd_drc_mem_used += num * slotsize; | |
1046 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1047 | |
5b6feee9 BF |
1048 | return num; |
1049 | } | |
ec6b5d7b | 1050 | |
55c760cf | 1051 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1052 | { |
55c760cf BF |
1053 | int slotsize = slot_bytes(ca); |
1054 | ||
4bd9b0f4 | 1055 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1056 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1057 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1058 | } |
ec6b5d7b | 1059 | |
60810e54 KM |
1060 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1061 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1062 | { |
60810e54 KM |
1063 | int numslots = fattrs->maxreqs; |
1064 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1065 | struct nfsd4_session *new; |
1066 | int mem, i; | |
a649637c | 1067 | |
5b6feee9 BF |
1068 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1069 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1070 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1071 | |
5b6feee9 BF |
1072 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1073 | if (!new) | |
1074 | return NULL; | |
557ce264 | 1075 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1076 | for (i = 0; i < numslots; i++) { |
55c760cf | 1077 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1078 | if (!new->se_slots[i]) |
557ce264 | 1079 | goto out_free; |
557ce264 | 1080 | } |
60810e54 KM |
1081 | |
1082 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1083 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1084 | ||
5b6feee9 BF |
1085 | return new; |
1086 | out_free: | |
1087 | while (i--) | |
1088 | kfree(new->se_slots[i]); | |
1089 | kfree(new); | |
1090 | return NULL; | |
ec6b5d7b AA |
1091 | } |
1092 | ||
19cf5c02 BF |
1093 | static void free_conn(struct nfsd4_conn *c) |
1094 | { | |
1095 | svc_xprt_put(c->cn_xprt); | |
1096 | kfree(c); | |
1097 | } | |
ec6b5d7b | 1098 | |
19cf5c02 BF |
1099 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1100 | { | |
1101 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1102 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1103 | |
19cf5c02 BF |
1104 | spin_lock(&clp->cl_lock); |
1105 | if (!list_empty(&c->cn_persession)) { | |
1106 | list_del(&c->cn_persession); | |
1107 | free_conn(c); | |
1108 | } | |
eea49806 | 1109 | nfsd4_probe_callback(clp); |
2e4b7239 | 1110 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1111 | } |
ec6b5d7b | 1112 | |
d29c374c | 1113 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1114 | { |
c7662518 | 1115 | struct nfsd4_conn *conn; |
ec6b5d7b | 1116 | |
c7662518 BF |
1117 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1118 | if (!conn) | |
db90681d | 1119 | return NULL; |
c7662518 BF |
1120 | svc_xprt_get(rqstp->rq_xprt); |
1121 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1122 | conn->cn_flags = flags; |
db90681d BF |
1123 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1124 | return conn; | |
1125 | } | |
a649637c | 1126 | |
328ead28 BF |
1127 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1128 | { | |
1129 | conn->cn_session = ses; | |
1130 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1131 | } |
1132 | ||
db90681d | 1133 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1134 | { |
db90681d | 1135 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1136 | |
c7662518 | 1137 | spin_lock(&clp->cl_lock); |
328ead28 | 1138 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1139 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1140 | } |
1141 | ||
21b75b01 | 1142 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1143 | { |
19cf5c02 | 1144 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1145 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1146 | } |
1147 | ||
e1ff371f | 1148 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1149 | { |
21b75b01 | 1150 | int ret; |
ec6b5d7b | 1151 | |
db90681d | 1152 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1153 | ret = nfsd4_register_conn(conn); |
1154 | if (ret) | |
1155 | /* oops; xprt is already down: */ | |
1156 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 1157 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
1158 | /* callback channel may be back up */ |
1159 | nfsd4_probe_callback(ses->se_client); | |
1160 | } | |
c7662518 | 1161 | } |
ec6b5d7b | 1162 | |
e1ff371f | 1163 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1164 | { |
1165 | u32 dir = NFS4_CDFC4_FORE; | |
1166 | ||
e1ff371f | 1167 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1168 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1169 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1170 | } |
1171 | ||
1172 | /* must be called under client_lock */ | |
19cf5c02 | 1173 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1174 | { |
19cf5c02 BF |
1175 | struct nfs4_client *clp = s->se_client; |
1176 | struct nfsd4_conn *c; | |
ec6b5d7b | 1177 | |
19cf5c02 BF |
1178 | spin_lock(&clp->cl_lock); |
1179 | while (!list_empty(&s->se_conns)) { | |
1180 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1181 | list_del_init(&c->cn_persession); | |
1182 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1183 | |
19cf5c02 BF |
1184 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1185 | free_conn(c); | |
ec6b5d7b | 1186 | |
19cf5c02 BF |
1187 | spin_lock(&clp->cl_lock); |
1188 | } | |
1189 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1190 | } |
ec6b5d7b | 1191 | |
1377b69e BF |
1192 | static void __free_session(struct nfsd4_session *ses) |
1193 | { | |
1377b69e BF |
1194 | free_session_slots(ses); |
1195 | kfree(ses); | |
1196 | } | |
1197 | ||
66b2b9b2 | 1198 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1199 | { |
66b2b9b2 | 1200 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1201 | |
1202 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1203 | nfsd4_del_conns(ses); |
55c760cf | 1204 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1205 | __free_session(ses); |
c7662518 BF |
1206 | } |
1207 | ||
135ae827 | 1208 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1209 | { |
a827bcb2 | 1210 | int idx; |
1872de0e | 1211 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1212 | |
ec6b5d7b AA |
1213 | new->se_client = clp; |
1214 | gen_sessionid(new); | |
ec6b5d7b | 1215 | |
c7662518 BF |
1216 | INIT_LIST_HEAD(&new->se_conns); |
1217 | ||
ac7c46f2 | 1218 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1219 | new->se_flags = cses->flags; |
8b5ce5cd | 1220 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1221 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1222 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1223 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1224 | spin_lock(&nn->client_lock); |
1872de0e | 1225 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1226 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1227 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1228 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1229 | spin_unlock(&nn->client_lock); |
60810e54 | 1230 | |
dcbeaa68 | 1231 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1232 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1233 | /* |
1234 | * This is a little silly; with sessions there's no real | |
1235 | * use for the callback address. Use the peer address | |
1236 | * as a reasonable default for now, but consider fixing | |
1237 | * the rpc client not to require an address in the | |
1238 | * future: | |
1239 | */ | |
edd76786 BF |
1240 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1241 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1242 | } |
ec6b5d7b AA |
1243 | } |
1244 | ||
9089f1b4 | 1245 | /* caller must hold client_lock */ |
5282fd72 | 1246 | static struct nfsd4_session * |
d4e19e70 | 1247 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1248 | { |
1249 | struct nfsd4_session *elem; | |
1250 | int idx; | |
1872de0e | 1251 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1252 | |
1253 | dump_sessionid(__func__, sessionid); | |
1254 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1255 | /* Search in the appropriate list */ |
1872de0e | 1256 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1257 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1258 | NFS4_MAX_SESSIONID_LEN)) { | |
1259 | return elem; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | dprintk("%s: session not found\n", __func__); | |
1264 | return NULL; | |
1265 | } | |
1266 | ||
d4e19e70 TM |
1267 | static struct nfsd4_session * |
1268 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1269 | __be32 *ret) | |
1270 | { | |
1271 | struct nfsd4_session *session; | |
1272 | __be32 status = nfserr_badsession; | |
1273 | ||
1274 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1275 | if (!session) | |
1276 | goto out; | |
1277 | status = nfsd4_get_session_locked(session); | |
1278 | if (status) | |
1279 | session = NULL; | |
1280 | out: | |
1281 | *ret = status; | |
1282 | return session; | |
1283 | } | |
1284 | ||
9089f1b4 | 1285 | /* caller must hold client_lock */ |
7116ed6b | 1286 | static void |
5282fd72 | 1287 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1288 | { |
1289 | list_del(&ses->se_hash); | |
4c649378 | 1290 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1291 | list_del(&ses->se_perclnt); |
4c649378 | 1292 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1293 | } |
1294 | ||
1da177e4 LT |
1295 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1296 | static int | |
2c142baa | 1297 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1298 | { |
2c142baa | 1299 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1300 | return 0; |
60adfc50 | 1301 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1302 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1303 | return 1; |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * XXX Should we use a slab cache ? | |
1308 | * This type of memory management is somewhat inefficient, but we use it | |
1309 | * anyway since SETCLIENTID is not a common operation. | |
1310 | */ | |
35bba9a3 | 1311 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1312 | { |
1313 | struct nfs4_client *clp; | |
1314 | ||
35bba9a3 BF |
1315 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1316 | if (clp == NULL) | |
1317 | return NULL; | |
67114fe6 | 1318 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1319 | if (clp->cl_name.data == NULL) { |
1320 | kfree(clp); | |
1321 | return NULL; | |
1da177e4 | 1322 | } |
35bba9a3 | 1323 | clp->cl_name.len = name.len; |
5694c93e TM |
1324 | INIT_LIST_HEAD(&clp->cl_sessions); |
1325 | idr_init(&clp->cl_stateids); | |
1326 | atomic_set(&clp->cl_refcount, 0); | |
1327 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1328 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1329 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1330 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1331 | INIT_LIST_HEAD(&clp->cl_lru); | |
1332 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1333 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1334 | spin_lock_init(&clp->cl_lock); | |
1335 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1336 | return clp; |
1337 | } | |
1338 | ||
4dd86e15 | 1339 | static void |
1da177e4 LT |
1340 | free_client(struct nfs4_client *clp) |
1341 | { | |
bca0ec65 | 1342 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1343 | |
1344 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1345 | while (!list_empty(&clp->cl_sessions)) { |
1346 | struct nfsd4_session *ses; | |
1347 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1348 | se_perclnt); | |
1349 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1350 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1351 | free_session(ses); | |
792c95dd | 1352 | } |
4cb57e30 | 1353 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1354 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1355 | kfree(clp->cl_name.data); |
2d32b29a | 1356 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1357 | kfree(clp); |
1358 | } | |
1359 | ||
84d38ac9 BH |
1360 | /* must be called under the client_lock */ |
1361 | static inline void | |
1362 | unhash_client_locked(struct nfs4_client *clp) | |
1363 | { | |
792c95dd BF |
1364 | struct nfsd4_session *ses; |
1365 | ||
84d38ac9 | 1366 | list_del(&clp->cl_lru); |
4c649378 | 1367 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1368 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1369 | list_del_init(&ses->se_hash); | |
4c649378 | 1370 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1371 | } |
1372 | ||
1da177e4 | 1373 | static void |
0d22f68f | 1374 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1375 | { |
fe0750e5 | 1376 | struct nfs4_openowner *oo; |
1da177e4 | 1377 | struct nfs4_delegation *dp; |
1da177e4 | 1378 | struct list_head reaplist; |
382a62e7 | 1379 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1380 | |
1da177e4 | 1381 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1382 | spin_lock(&state_lock); |
ea1da636 N |
1383 | while (!list_empty(&clp->cl_delegations)) { |
1384 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1385 | list_del_init(&dp->dl_perclnt); |
dff1399f JL |
1386 | /* Ensure that deleg break won't try to requeue it */ |
1387 | ++dp->dl_time; | |
1da177e4 LT |
1388 | list_move(&dp->dl_recall_lru, &reaplist); |
1389 | } | |
cdc97505 | 1390 | spin_unlock(&state_lock); |
1da177e4 LT |
1391 | while (!list_empty(&reaplist)) { |
1392 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1393 | destroy_delegation(dp); |
1da177e4 | 1394 | } |
956c4fee BH |
1395 | list_splice_init(&clp->cl_revoked, &reaplist); |
1396 | while (!list_empty(&reaplist)) { | |
1397 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1398 | destroy_revoked_delegation(dp); | |
1399 | } | |
ea1da636 | 1400 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1401 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1402 | release_openowner(oo); | |
1da177e4 | 1403 | } |
6ff8da08 | 1404 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1405 | if (clp->cl_cb_conn.cb_xprt) |
1406 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1407 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1408 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1409 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1410 | else |
a99454aa | 1411 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1412 | spin_lock(&nn->client_lock); |
84d38ac9 | 1413 | unhash_client_locked(clp); |
221a6876 BF |
1414 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1415 | free_client(clp); | |
c9a49628 | 1416 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1417 | } |
1418 | ||
0d22f68f BF |
1419 | static void expire_client(struct nfs4_client *clp) |
1420 | { | |
1421 | nfsd4_client_record_remove(clp); | |
1422 | destroy_client(clp); | |
1423 | } | |
1424 | ||
35bba9a3 BF |
1425 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1426 | { | |
1427 | memcpy(target->cl_verifier.data, source->data, | |
1428 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1429 | } |
1430 | ||
35bba9a3 BF |
1431 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1432 | { | |
1da177e4 LT |
1433 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1434 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1435 | } | |
1436 | ||
03a4e1f6 | 1437 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1438 | { |
03a4e1f6 BF |
1439 | if (source->cr_principal) { |
1440 | target->cr_principal = | |
1441 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1442 | if (target->cr_principal == NULL) | |
1443 | return -ENOMEM; | |
1444 | } else | |
1445 | target->cr_principal = NULL; | |
d5497fc6 | 1446 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1447 | target->cr_uid = source->cr_uid; |
1448 | target->cr_gid = source->cr_gid; | |
1449 | target->cr_group_info = source->cr_group_info; | |
1450 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1451 | target->cr_gss_mech = source->cr_gss_mech; |
1452 | if (source->cr_gss_mech) | |
1453 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1454 | return 0; |
1da177e4 LT |
1455 | } |
1456 | ||
ac55fdc4 JL |
1457 | static long long |
1458 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1459 | { | |
1460 | long long res; | |
1461 | ||
1462 | res = o1->len - o2->len; | |
1463 | if (res) | |
1464 | return res; | |
1465 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1466 | } | |
1467 | ||
35bba9a3 | 1468 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1469 | { |
a55370a3 | 1470 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1471 | } |
1472 | ||
1473 | static int | |
599e0a22 BF |
1474 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1475 | { | |
1476 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | static int | |
599e0a22 BF |
1480 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1481 | { | |
1482 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1483 | } |
1484 | ||
8fbba96e BF |
1485 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1486 | { | |
1487 | int i; | |
1488 | ||
1489 | if (g1->ngroups != g2->ngroups) | |
1490 | return false; | |
1491 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1492 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1493 | return false; |
1494 | return true; | |
1495 | } | |
1496 | ||
68eb3508 BF |
1497 | /* |
1498 | * RFC 3530 language requires clid_inuse be returned when the | |
1499 | * "principal" associated with a requests differs from that previously | |
1500 | * used. We use uid, gid's, and gss principal string as our best | |
1501 | * approximation. We also don't want to allow non-gss use of a client | |
1502 | * established using gss: in theory cr_principal should catch that | |
1503 | * change, but in practice cr_principal can be null even in the gss case | |
1504 | * since gssd doesn't always pass down a principal string. | |
1505 | */ | |
1506 | static bool is_gss_cred(struct svc_cred *cr) | |
1507 | { | |
1508 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1509 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1510 | } | |
1511 | ||
1512 | ||
5559b50a | 1513 | static bool |
599e0a22 BF |
1514 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1515 | { | |
68eb3508 | 1516 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1517 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1518 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1519 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1520 | return false; | |
1521 | if (cr1->cr_principal == cr2->cr_principal) | |
1522 | return true; | |
1523 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1524 | return false; | |
5559b50a | 1525 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1526 | } |
1527 | ||
57266a6e BF |
1528 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1529 | { | |
1530 | struct svc_cred *cr = &rqstp->rq_cred; | |
1531 | u32 service; | |
1532 | ||
c4720591 BF |
1533 | if (!cr->cr_gss_mech) |
1534 | return false; | |
57266a6e BF |
1535 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1536 | return service == RPC_GSS_SVC_INTEGRITY || | |
1537 | service == RPC_GSS_SVC_PRIVACY; | |
1538 | } | |
1539 | ||
1540 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1541 | { | |
1542 | struct svc_cred *cr = &rqstp->rq_cred; | |
1543 | ||
1544 | if (!cl->cl_mach_cred) | |
1545 | return true; | |
1546 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1547 | return false; | |
1548 | if (!svc_rqst_integrity_protected(rqstp)) | |
1549 | return false; | |
1550 | if (!cr->cr_principal) | |
1551 | return false; | |
1552 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1553 | } | |
1554 | ||
c212cecf | 1555 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1556 | { |
1557 | static u32 current_clientid = 1; | |
1558 | ||
2c142baa | 1559 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1560 | clp->cl_clientid.cl_id = current_clientid++; |
1561 | } | |
1562 | ||
deda2faa BF |
1563 | static void gen_confirm(struct nfs4_client *clp) |
1564 | { | |
ab4684d1 | 1565 | __be32 verf[2]; |
deda2faa | 1566 | static u32 i; |
1da177e4 | 1567 | |
f419992c JL |
1568 | /* |
1569 | * This is opaque to client, so no need to byte-swap. Use | |
1570 | * __force to keep sparse happy | |
1571 | */ | |
1572 | verf[0] = (__force __be32)get_seconds(); | |
1573 | verf[1] = (__force __be32)i++; | |
ab4684d1 | 1574 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
1575 | } |
1576 | ||
38c2f4b1 | 1577 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1578 | { |
3abdb607 BF |
1579 | struct nfs4_stid *ret; |
1580 | ||
1581 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1582 | if (!ret || !ret->sc_type) | |
1583 | return NULL; | |
1584 | return ret; | |
4d71ab87 BF |
1585 | } |
1586 | ||
38c2f4b1 | 1587 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1588 | { |
1589 | struct nfs4_stid *s; | |
4d71ab87 | 1590 | |
38c2f4b1 | 1591 | s = find_stateid(cl, t); |
4d71ab87 BF |
1592 | if (!s) |
1593 | return NULL; | |
f459e453 | 1594 | if (typemask & s->sc_type) |
4581d140 | 1595 | return s; |
4581d140 BF |
1596 | return NULL; |
1597 | } | |
1598 | ||
2216d449 | 1599 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1600 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1601 | { | |
1602 | struct nfs4_client *clp; | |
1603 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1604 | int ret; |
c212cecf | 1605 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1606 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1607 | |
1608 | clp = alloc_client(name); | |
1609 | if (clp == NULL) | |
1610 | return NULL; | |
1611 | ||
03a4e1f6 BF |
1612 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1613 | if (ret) { | |
c9a49628 | 1614 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1615 | free_client(clp); |
c9a49628 | 1616 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1617 | return NULL; |
b09333c4 | 1618 | } |
57725155 | 1619 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1620 | clp->cl_time = get_seconds(); |
b09333c4 | 1621 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1622 | copy_verf(clp, verf); |
1623 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1624 | gen_confirm(clp); |
edd76786 | 1625 | clp->cl_cb_session = NULL; |
c212cecf | 1626 | clp->net = net; |
b09333c4 RL |
1627 | return clp; |
1628 | } | |
1629 | ||
fd39ca9a | 1630 | static void |
ac55fdc4 JL |
1631 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1632 | { | |
1633 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1634 | struct nfs4_client *clp; | |
1635 | ||
1636 | while (*new) { | |
1637 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1638 | parent = *new; | |
1639 | ||
1640 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1641 | new = &((*new)->rb_left); | |
1642 | else | |
1643 | new = &((*new)->rb_right); | |
1644 | } | |
1645 | ||
1646 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1647 | rb_insert_color(&new_clp->cl_namenode, root); | |
1648 | } | |
1649 | ||
1650 | static struct nfs4_client * | |
1651 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1652 | { | |
1653 | long long cmp; | |
1654 | struct rb_node *node = root->rb_node; | |
1655 | struct nfs4_client *clp; | |
1656 | ||
1657 | while (node) { | |
1658 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1659 | cmp = compare_blob(&clp->cl_name, name); | |
1660 | if (cmp > 0) | |
1661 | node = node->rb_left; | |
1662 | else if (cmp < 0) | |
1663 | node = node->rb_right; | |
1664 | else | |
1665 | return clp; | |
1666 | } | |
1667 | return NULL; | |
1668 | } | |
1669 | ||
1670 | static void | |
1671 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1672 | { |
1673 | unsigned int idhashval; | |
0a7ec377 | 1674 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1675 | |
ac55fdc4 | 1676 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1677 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1678 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1679 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1680 | renew_client(clp); |
1da177e4 LT |
1681 | } |
1682 | ||
fd39ca9a | 1683 | static void |
1da177e4 LT |
1684 | move_to_confirmed(struct nfs4_client *clp) |
1685 | { | |
1686 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1687 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1688 | |
1689 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1690 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1691 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1692 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1693 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1694 | renew_client(clp); |
1695 | } | |
1696 | ||
1697 | static struct nfs4_client * | |
bfa85e83 | 1698 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1699 | { |
1700 | struct nfs4_client *clp; | |
1701 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1702 | ||
bfa85e83 | 1703 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1704 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1705 | if ((bool)clp->cl_minorversion != sessions) |
1706 | return NULL; | |
a50d2ad1 | 1707 | renew_client(clp); |
1da177e4 | 1708 | return clp; |
a50d2ad1 | 1709 | } |
1da177e4 LT |
1710 | } |
1711 | return NULL; | |
1712 | } | |
1713 | ||
bfa85e83 BF |
1714 | static struct nfs4_client * |
1715 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1716 | { | |
1717 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1718 | ||
1719 | return find_client_in_id_table(tbl, clid, sessions); | |
1720 | } | |
1721 | ||
1da177e4 | 1722 | static struct nfs4_client * |
0a7ec377 | 1723 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1724 | { |
bfa85e83 | 1725 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1726 | |
bfa85e83 | 1727 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1728 | } |
1729 | ||
6e5f15c9 | 1730 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1731 | { |
6e5f15c9 | 1732 | return clp->cl_exchange_flags != 0; |
e203d506 | 1733 | } |
a1bcecd2 | 1734 | |
28ce6054 | 1735 | static struct nfs4_client * |
382a62e7 | 1736 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1737 | { |
382a62e7 | 1738 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1739 | } |
1740 | ||
1741 | static struct nfs4_client * | |
a99454aa | 1742 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1743 | { |
a99454aa | 1744 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1745 | } |
1746 | ||
fd39ca9a | 1747 | static void |
6f3d772f | 1748 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1749 | { |
07263f1e | 1750 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1751 | struct sockaddr *sa = svc_addr(rqstp); |
1752 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1753 | unsigned short expected_family; |
1754 | ||
1755 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1756 | if (se->se_callback_netid_len == 3 && | |
1757 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1758 | expected_family = AF_INET; | |
1759 | else if (se->se_callback_netid_len == 4 && | |
1760 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1761 | expected_family = AF_INET6; | |
1762 | else | |
1da177e4 LT |
1763 | goto out_err; |
1764 | ||
c212cecf | 1765 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1766 | se->se_callback_addr_len, |
07263f1e BF |
1767 | (struct sockaddr *)&conn->cb_addr, |
1768 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1769 | |
07263f1e | 1770 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1771 | goto out_err; |
aa9a4ec7 | 1772 | |
07263f1e BF |
1773 | if (conn->cb_addr.ss_family == AF_INET6) |
1774 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1775 | |
07263f1e BF |
1776 | conn->cb_prog = se->se_callback_prog; |
1777 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1778 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1779 | return; |
1780 | out_err: | |
07263f1e BF |
1781 | conn->cb_addr.ss_family = AF_UNSPEC; |
1782 | conn->cb_addrlen = 0; | |
849823c5 | 1783 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1784 | "will not receive delegations\n", |
1785 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1786 | ||
1da177e4 LT |
1787 | return; |
1788 | } | |
1789 | ||
074fe897 | 1790 | /* |
067e1ace | 1791 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1792 | */ |
b607664e | 1793 | static void |
074fe897 | 1794 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 1795 | { |
f5236013 | 1796 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1797 | struct nfsd4_slot *slot = resp->cstate.slot; |
1798 | unsigned int base; | |
074fe897 | 1799 | |
557ce264 | 1800 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1801 | |
557ce264 AA |
1802 | slot->sl_opcnt = resp->opcnt; |
1803 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1804 | |
bf5c43c8 | 1805 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1806 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1807 | slot->sl_datalen = 0; |
bf864a31 | 1808 | return; |
074fe897 | 1809 | } |
f5236013 BF |
1810 | base = resp->cstate.data_offset; |
1811 | slot->sl_datalen = buf->len - base; | |
1812 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1813 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1814 | return; | |
074fe897 AA |
1815 | } |
1816 | ||
1817 | /* | |
abfabf8c AA |
1818 | * Encode the replay sequence operation from the slot values. |
1819 | * If cachethis is FALSE encode the uncached rep error on the next | |
1820 | * operation which sets resp->p and increments resp->opcnt for | |
1821 | * nfs4svc_encode_compoundres. | |
074fe897 | 1822 | * |
074fe897 | 1823 | */ |
abfabf8c AA |
1824 | static __be32 |
1825 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1826 | struct nfsd4_compoundres *resp) | |
074fe897 | 1827 | { |
abfabf8c AA |
1828 | struct nfsd4_op *op; |
1829 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1830 | |
abfabf8c AA |
1831 | /* Encode the replayed sequence operation */ |
1832 | op = &args->ops[resp->opcnt - 1]; | |
1833 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1834 | |
abfabf8c | 1835 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1836 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1837 | op = &args->ops[resp->opcnt++]; |
1838 | op->status = nfserr_retry_uncached_rep; | |
1839 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1840 | } |
abfabf8c | 1841 | return op->status; |
074fe897 AA |
1842 | } |
1843 | ||
1844 | /* | |
557ce264 AA |
1845 | * The sequence operation is not cached because we can use the slot and |
1846 | * session values. | |
074fe897 | 1847 | */ |
3ca2eb98 | 1848 | static __be32 |
bf864a31 AA |
1849 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1850 | struct nfsd4_sequence *seq) | |
074fe897 | 1851 | { |
557ce264 | 1852 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1853 | struct xdr_stream *xdr = &resp->xdr; |
1854 | __be32 *p; | |
074fe897 AA |
1855 | __be32 status; |
1856 | ||
557ce264 | 1857 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1858 | |
abfabf8c | 1859 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1860 | if (status) |
abfabf8c | 1861 | return status; |
074fe897 | 1862 | |
f5236013 BF |
1863 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1864 | if (!p) { | |
1865 | WARN_ON_ONCE(1); | |
1866 | return nfserr_serverfault; | |
1867 | } | |
1868 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1869 | xdr_commit_encode(xdr); | |
074fe897 | 1870 | |
557ce264 | 1871 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1872 | return slot->sl_status; |
074fe897 AA |
1873 | } |
1874 | ||
0733d213 AA |
1875 | /* |
1876 | * Set the exchange_id flags returned by the server. | |
1877 | */ | |
1878 | static void | |
1879 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1880 | { | |
1881 | /* pNFS is not supported */ | |
1882 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1883 | ||
1884 | /* Referrals are supported, Migration is not. */ | |
1885 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1886 | ||
1887 | /* set the wire flags to return to client. */ | |
1888 | clid->flags = new->cl_exchange_flags; | |
1889 | } | |
1890 | ||
631fc9ea BF |
1891 | static bool client_has_state(struct nfs4_client *clp) |
1892 | { | |
1893 | /* | |
1894 | * Note clp->cl_openowners check isn't quite right: there's no | |
1895 | * need to count owners without stateid's. | |
1896 | * | |
1897 | * Also note we should probably be using this in 4.0 case too. | |
1898 | */ | |
6eccece9 BF |
1899 | return !list_empty(&clp->cl_openowners) |
1900 | || !list_empty(&clp->cl_delegations) | |
1901 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1902 | } |
1903 | ||
069b6ad4 AA |
1904 | __be32 |
1905 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1906 | struct nfsd4_compound_state *cstate, | |
1907 | struct nfsd4_exchange_id *exid) | |
1908 | { | |
0733d213 | 1909 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1910 | __be32 status; |
363168b4 | 1911 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1912 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1913 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1914 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1915 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1916 | |
363168b4 | 1917 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1918 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1919 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1920 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1921 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1922 | |
a084daf5 | 1923 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1924 | return nfserr_inval; |
1925 | ||
0733d213 | 1926 | switch (exid->spa_how) { |
57266a6e BF |
1927 | case SP4_MACH_CRED: |
1928 | if (!svc_rqst_integrity_protected(rqstp)) | |
1929 | return nfserr_inval; | |
0733d213 AA |
1930 | case SP4_NONE: |
1931 | break; | |
063b0fb9 BF |
1932 | default: /* checked by xdr code */ |
1933 | WARN_ON_ONCE(1); | |
0733d213 | 1934 | case SP4_SSV: |
dd30333c | 1935 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1936 | } |
1937 | ||
2dbb269d | 1938 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1939 | nfs4_lock_state(); |
382a62e7 | 1940 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1941 | if (conf) { |
83e08fd4 BF |
1942 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1943 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1944 | ||
136e658d BF |
1945 | if (update) { |
1946 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1947 | status = nfserr_inval; |
1a308118 BF |
1948 | goto out; |
1949 | } | |
57266a6e BF |
1950 | if (!mach_creds_match(conf, rqstp)) { |
1951 | status = nfserr_wrong_cred; | |
1952 | goto out; | |
1953 | } | |
136e658d | 1954 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1955 | status = nfserr_perm; |
136e658d BF |
1956 | goto out; |
1957 | } | |
1958 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1959 | status = nfserr_not_same; |
1960 | goto out; | |
1961 | } | |
136e658d BF |
1962 | /* case 6 */ |
1963 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1964 | new = conf; | |
1965 | goto out_copy; | |
0733d213 | 1966 | } |
136e658d | 1967 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1968 | if (client_has_state(conf)) { |
1969 | status = nfserr_clid_inuse; | |
0733d213 AA |
1970 | goto out; |
1971 | } | |
1972 | expire_client(conf); | |
1973 | goto out_new; | |
1974 | } | |
136e658d | 1975 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1976 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1977 | new = conf; |
1978 | goto out_copy; | |
1979 | } | |
1980 | /* case 5, client reboot */ | |
136e658d | 1981 | goto out_new; |
6ddbbbfe MS |
1982 | } |
1983 | ||
2dbb269d | 1984 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1985 | status = nfserr_noent; |
1986 | goto out; | |
0733d213 AA |
1987 | } |
1988 | ||
a99454aa | 1989 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1990 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1991 | expire_client(unconf); |
0733d213 | 1992 | |
2dbb269d | 1993 | /* case 1 (normal case) */ |
0733d213 | 1994 | out_new: |
2216d449 | 1995 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1996 | if (new == NULL) { |
4731030d | 1997 | status = nfserr_jukebox; |
0733d213 AA |
1998 | goto out; |
1999 | } | |
4f540e29 | 2000 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 2001 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 2002 | |
c212cecf | 2003 | gen_clid(new, nn); |
ac55fdc4 | 2004 | add_to_unconfirmed(new); |
0733d213 AA |
2005 | out_copy: |
2006 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
2007 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
2008 | ||
778df3f0 | 2009 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
2010 | nfsd4_set_ex_flags(new, exid); |
2011 | ||
2012 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 2013 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
2014 | status = nfs_ok; |
2015 | ||
2016 | out: | |
2017 | nfs4_unlock_state(); | |
0733d213 | 2018 | return status; |
069b6ad4 AA |
2019 | } |
2020 | ||
57b7b43b | 2021 | static __be32 |
88e588d5 | 2022 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 2023 | { |
88e588d5 AA |
2024 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
2025 | slot_seqid); | |
b85d4c01 BH |
2026 | |
2027 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
2028 | if (slot_inuse) { |
2029 | if (seqid == slot_seqid) | |
b85d4c01 BH |
2030 | return nfserr_jukebox; |
2031 | else | |
2032 | return nfserr_seq_misordered; | |
2033 | } | |
f6d82485 | 2034 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 2035 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 2036 | return nfs_ok; |
88e588d5 | 2037 | if (seqid == slot_seqid) |
b85d4c01 | 2038 | return nfserr_replay_cache; |
b85d4c01 BH |
2039 | return nfserr_seq_misordered; |
2040 | } | |
2041 | ||
49557cc7 AA |
2042 | /* |
2043 | * Cache the create session result into the create session single DRC | |
2044 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
2045 | * Do this for solo or embedded create session operations. | |
2046 | */ | |
2047 | static void | |
2048 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 2049 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
2050 | { |
2051 | slot->sl_status = nfserr; | |
2052 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
2053 | } | |
2054 | ||
2055 | static __be32 | |
2056 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
2057 | struct nfsd4_clid_slot *slot) | |
2058 | { | |
2059 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
2060 | return slot->sl_status; | |
2061 | } | |
2062 | ||
1b74c25b MJ |
2063 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
2064 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
2065 | 1 + /* MIN tag is length with zero, only length */ \ | |
2066 | 3 + /* version, opcount, opcode */ \ | |
2067 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2068 | /* seqid, slotID, slotID, cache */ \ | |
2069 | 4 ) * sizeof(__be32)) | |
2070 | ||
2071 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
2072 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
2073 | 1 + /* status */ \ | |
2074 | 1 + /* MIN tag is length with zero, only length */ \ | |
2075 | 3 + /* opcount, opcode, opstatus*/ \ | |
2076 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
2077 | /* seqid, slotID, slotID, slotID, status */ \ | |
2078 | 5 ) * sizeof(__be32)) | |
2079 | ||
55c760cf | 2080 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 2081 | { |
55c760cf BF |
2082 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
2083 | ||
373cd409 BF |
2084 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
2085 | return nfserr_toosmall; | |
2086 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
2087 | return nfserr_toosmall; | |
55c760cf BF |
2088 | ca->headerpadsz = 0; |
2089 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
2090 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
2091 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
2092 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
2093 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
2094 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
2095 | /* | |
2096 | * Note decreasing slot size below client's request may make it | |
2097 | * difficult for client to function correctly, whereas | |
2098 | * decreasing the number of slots will (just?) affect | |
2099 | * performance. When short on memory we therefore prefer to | |
2100 | * decrease number of slots instead of their size. Clients that | |
2101 | * request larger slots than they need will get poor results: | |
2102 | */ | |
2103 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
2104 | if (!ca->maxreqs) | |
2105 | return nfserr_jukebox; | |
2106 | ||
373cd409 | 2107 | return nfs_ok; |
1b74c25b MJ |
2108 | } |
2109 | ||
8a891633 KM |
2110 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
2111 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
2112 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
2113 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
2114 | ||
06b332a5 | 2115 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 2116 | { |
06b332a5 BF |
2117 | ca->headerpadsz = 0; |
2118 | ||
2119 | /* | |
2120 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
2121 | * don't even do gss on the backchannel yet. But this is still | |
2122 | * less than 1k. Tighten up this estimate in the unlikely event | |
2123 | * it turns out to be a problem for some client: | |
2124 | */ | |
8a891633 | 2125 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 2126 | return nfserr_toosmall; |
8a891633 | 2127 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
2128 | return nfserr_toosmall; |
2129 | ca->maxresp_cached = 0; | |
2130 | if (ca->maxops < 2) | |
2131 | return nfserr_toosmall; | |
2132 | ||
2133 | return nfs_ok; | |
1b74c25b MJ |
2134 | } |
2135 | ||
b78724b7 BF |
2136 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
2137 | { | |
2138 | switch (cbs->flavor) { | |
2139 | case RPC_AUTH_NULL: | |
2140 | case RPC_AUTH_UNIX: | |
2141 | return nfs_ok; | |
2142 | default: | |
2143 | /* | |
2144 | * GSS case: the spec doesn't allow us to return this | |
2145 | * error. But it also doesn't allow us not to support | |
2146 | * GSS. | |
2147 | * I'd rather this fail hard than return some error the | |
2148 | * client might think it can already handle: | |
2149 | */ | |
2150 | return nfserr_encr_alg_unsupp; | |
2151 | } | |
2152 | } | |
2153 | ||
069b6ad4 AA |
2154 | __be32 |
2155 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2156 | struct nfsd4_compound_state *cstate, | |
2157 | struct nfsd4_create_session *cr_ses) | |
2158 | { | |
363168b4 | 2159 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2160 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2161 | struct nfsd4_session *new; |
81f0b2a4 | 2162 | struct nfsd4_conn *conn; |
49557cc7 | 2163 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2164 | __be32 status = 0; |
8daae4dc | 2165 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2166 | |
a62573dc MJ |
2167 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2168 | return nfserr_inval; | |
b78724b7 BF |
2169 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2170 | if (status) | |
2171 | return status; | |
55c760cf | 2172 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2173 | if (status) |
2174 | return status; | |
2175 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2176 | if (status) |
f403e450 | 2177 | goto out_release_drc_mem; |
81f0b2a4 | 2178 | status = nfserr_jukebox; |
60810e54 | 2179 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2180 | if (!new) |
2181 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2182 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2183 | if (!conn) | |
2184 | goto out_free_session; | |
a62573dc | 2185 | |
ec6b5d7b | 2186 | nfs4_lock_state(); |
0a7ec377 | 2187 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2188 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2189 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2190 | |
2191 | if (conf) { | |
57266a6e BF |
2192 | status = nfserr_wrong_cred; |
2193 | if (!mach_creds_match(conf, rqstp)) | |
2194 | goto out_free_conn; | |
49557cc7 AA |
2195 | cs_slot = &conf->cl_cs_slot; |
2196 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2197 | if (status == nfserr_replay_cache) { |
49557cc7 | 2198 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2199 | goto out_free_conn; |
49557cc7 | 2200 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2201 | status = nfserr_seq_misordered; |
81f0b2a4 | 2202 | goto out_free_conn; |
ec6b5d7b | 2203 | } |
ec6b5d7b | 2204 | } else if (unconf) { |
8f9d3d3b | 2205 | struct nfs4_client *old; |
ec6b5d7b | 2206 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2207 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2208 | status = nfserr_clid_inuse; |
81f0b2a4 | 2209 | goto out_free_conn; |
ec6b5d7b | 2210 | } |
57266a6e BF |
2211 | status = nfserr_wrong_cred; |
2212 | if (!mach_creds_match(unconf, rqstp)) | |
2213 | goto out_free_conn; | |
49557cc7 AA |
2214 | cs_slot = &unconf->cl_cs_slot; |
2215 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2216 | if (status) { |
2217 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2218 | status = nfserr_seq_misordered; |
81f0b2a4 | 2219 | goto out_free_conn; |
ec6b5d7b | 2220 | } |
382a62e7 | 2221 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2222 | if (old) { |
2223 | status = mark_client_expired(old); | |
2224 | if (status) | |
2225 | goto out_free_conn; | |
8f9d3d3b | 2226 | expire_client(old); |
221a6876 | 2227 | } |
8f9d3d3b | 2228 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2229 | conf = unconf; |
2230 | } else { | |
2231 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2232 | goto out_free_conn; |
ec6b5d7b | 2233 | } |
81f0b2a4 | 2234 | status = nfs_ok; |
408b79bc BF |
2235 | /* |
2236 | * We do not support RDMA or persistent sessions | |
2237 | */ | |
2238 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2239 | cr_ses->flags &= ~SESSION4_RDMA; | |
2240 | ||
81f0b2a4 BF |
2241 | init_session(rqstp, new, conf, cr_ses); |
2242 | nfsd4_init_conn(rqstp, conn, new); | |
2243 | ||
ac7c46f2 | 2244 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2245 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2246 | cs_slot->sl_seqid++; |
49557cc7 | 2247 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2248 | |
49557cc7 AA |
2249 | /* cache solo and embedded create sessions under the state lock */ |
2250 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2251 | nfs4_unlock_state(); |
ec6b5d7b | 2252 | return status; |
81f0b2a4 | 2253 | out_free_conn: |
266533c6 | 2254 | nfs4_unlock_state(); |
81f0b2a4 BF |
2255 | free_conn(conn); |
2256 | out_free_session: | |
2257 | __free_session(new); | |
55c760cf BF |
2258 | out_release_drc_mem: |
2259 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2260 | return status; |
069b6ad4 AA |
2261 | } |
2262 | ||
1d1bc8f2 BF |
2263 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2264 | { | |
2265 | switch (*dir) { | |
2266 | case NFS4_CDFC4_FORE: | |
2267 | case NFS4_CDFC4_BACK: | |
2268 | return nfs_ok; | |
2269 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2270 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2271 | *dir = NFS4_CDFC4_BOTH; | |
2272 | return nfs_ok; | |
2273 | }; | |
2274 | return nfserr_inval; | |
2275 | } | |
2276 | ||
cb73a9f4 BF |
2277 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2278 | { | |
2279 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2280 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2281 | __be32 status; |
cb73a9f4 | 2282 | |
b78724b7 BF |
2283 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2284 | if (status) | |
2285 | return status; | |
c9a49628 | 2286 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2287 | session->se_cb_prog = bc->bc_cb_program; |
2288 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2289 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2290 | |
2291 | nfsd4_probe_callback(session->se_client); | |
2292 | ||
2293 | return nfs_ok; | |
2294 | } | |
2295 | ||
1d1bc8f2 BF |
2296 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2297 | struct nfsd4_compound_state *cstate, | |
2298 | struct nfsd4_bind_conn_to_session *bcts) | |
2299 | { | |
2300 | __be32 status; | |
3ba63671 | 2301 | struct nfsd4_conn *conn; |
4f6e6c17 | 2302 | struct nfsd4_session *session; |
d4e19e70 TM |
2303 | struct net *net = SVC_NET(rqstp); |
2304 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
2305 | |
2306 | if (!nfsd4_last_compound_op(rqstp)) | |
2307 | return nfserr_not_only_op; | |
4f6e6c17 | 2308 | nfs4_lock_state(); |
c9a49628 | 2309 | spin_lock(&nn->client_lock); |
d4e19e70 | 2310 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 2311 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 2312 | if (!session) |
d4e19e70 | 2313 | goto out_no_session; |
57266a6e BF |
2314 | status = nfserr_wrong_cred; |
2315 | if (!mach_creds_match(session->se_client, rqstp)) | |
2316 | goto out; | |
1d1bc8f2 | 2317 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2318 | if (status) |
4f6e6c17 | 2319 | goto out; |
3ba63671 | 2320 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2321 | status = nfserr_jukebox; |
3ba63671 | 2322 | if (!conn) |
4f6e6c17 BF |
2323 | goto out; |
2324 | nfsd4_init_conn(rqstp, conn, session); | |
2325 | status = nfs_ok; | |
2326 | out: | |
d4e19e70 TM |
2327 | nfsd4_put_session(session); |
2328 | out_no_session: | |
4f6e6c17 BF |
2329 | nfs4_unlock_state(); |
2330 | return status; | |
1d1bc8f2 BF |
2331 | } |
2332 | ||
5d4cec2f BF |
2333 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2334 | { | |
2335 | if (!session) | |
2336 | return 0; | |
2337 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2338 | } | |
2339 | ||
069b6ad4 AA |
2340 | __be32 |
2341 | nfsd4_destroy_session(struct svc_rqst *r, | |
2342 | struct nfsd4_compound_state *cstate, | |
2343 | struct nfsd4_destroy_session *sessionid) | |
2344 | { | |
e10e0cfc | 2345 | struct nfsd4_session *ses; |
abcdff09 | 2346 | __be32 status; |
f0f51f5c | 2347 | int ref_held_by_me = 0; |
d4e19e70 TM |
2348 | struct net *net = SVC_NET(r); |
2349 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 2350 | |
abcdff09 BF |
2351 | nfs4_lock_state(); |
2352 | status = nfserr_not_only_op; | |
5d4cec2f | 2353 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2354 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2355 | goto out; |
f0f51f5c | 2356 | ref_held_by_me++; |
57716355 | 2357 | } |
e10e0cfc | 2358 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2359 | spin_lock(&nn->client_lock); |
d4e19e70 | 2360 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
abcdff09 BF |
2361 | if (!ses) |
2362 | goto out_client_lock; | |
57266a6e BF |
2363 | status = nfserr_wrong_cred; |
2364 | if (!mach_creds_match(ses->se_client, r)) | |
d4e19e70 | 2365 | goto out_put_session; |
f0f51f5c | 2366 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 2367 | if (status) |
f0f51f5c | 2368 | goto out_put_session; |
e10e0cfc | 2369 | unhash_session(ses); |
c9a49628 | 2370 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2371 | |
84f5f7cc | 2372 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2373 | |
c9a49628 | 2374 | spin_lock(&nn->client_lock); |
e10e0cfc | 2375 | status = nfs_ok; |
f0f51f5c | 2376 | out_put_session: |
d4e19e70 | 2377 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
2378 | out_client_lock: |
2379 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2380 | out: |
abcdff09 | 2381 | nfs4_unlock_state(); |
e10e0cfc | 2382 | return status; |
069b6ad4 AA |
2383 | } |
2384 | ||
a663bdd8 | 2385 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2386 | { |
2387 | struct nfsd4_conn *c; | |
2388 | ||
2389 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2390 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2391 | return c; |
2392 | } | |
2393 | } | |
2394 | return NULL; | |
2395 | } | |
2396 | ||
57266a6e | 2397 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2398 | { |
2399 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2400 | struct nfsd4_conn *c; |
57266a6e | 2401 | __be32 status = nfs_ok; |
21b75b01 | 2402 | int ret; |
328ead28 BF |
2403 | |
2404 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2405 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2406 | if (c) |
2407 | goto out_free; | |
2408 | status = nfserr_conn_not_bound_to_session; | |
2409 | if (clp->cl_mach_cred) | |
2410 | goto out_free; | |
328ead28 BF |
2411 | __nfsd4_hash_conn(new, ses); |
2412 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2413 | ret = nfsd4_register_conn(new); |
2414 | if (ret) | |
2415 | /* oops; xprt is already down: */ | |
2416 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2417 | return nfs_ok; |
2418 | out_free: | |
2419 | spin_unlock(&clp->cl_lock); | |
2420 | free_conn(new); | |
2421 | return status; | |
328ead28 BF |
2422 | } |
2423 | ||
868b89c3 MJ |
2424 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2425 | { | |
2426 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2427 | ||
2428 | return args->opcnt > session->se_fchannel.maxops; | |
2429 | } | |
2430 | ||
ae82a8d0 MJ |
2431 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2432 | struct nfsd4_session *session) | |
2433 | { | |
2434 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2435 | ||
2436 | return xb->len > session->se_fchannel.maxreq_sz; | |
2437 | } | |
2438 | ||
069b6ad4 | 2439 | __be32 |
b85d4c01 | 2440 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2441 | struct nfsd4_compound_state *cstate, |
2442 | struct nfsd4_sequence *seq) | |
2443 | { | |
f9bb94c4 | 2444 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2445 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2446 | struct nfsd4_session *session; |
221a6876 | 2447 | struct nfs4_client *clp; |
b85d4c01 | 2448 | struct nfsd4_slot *slot; |
a663bdd8 | 2449 | struct nfsd4_conn *conn; |
57b7b43b | 2450 | __be32 status; |
47ee5298 | 2451 | int buflen; |
d4e19e70 TM |
2452 | struct net *net = SVC_NET(rqstp); |
2453 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 2454 | |
f9bb94c4 AA |
2455 | if (resp->opcnt != 1) |
2456 | return nfserr_sequence_pos; | |
2457 | ||
a663bdd8 BF |
2458 | /* |
2459 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2460 | * below. | |
2461 | */ | |
2462 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2463 | if (!conn) | |
2464 | return nfserr_jukebox; | |
2465 | ||
c9a49628 | 2466 | spin_lock(&nn->client_lock); |
d4e19e70 | 2467 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 2468 | if (!session) |
221a6876 BF |
2469 | goto out_no_session; |
2470 | clp = session->se_client; | |
b85d4c01 | 2471 | |
868b89c3 MJ |
2472 | status = nfserr_too_many_ops; |
2473 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2474 | goto out_put_session; |
868b89c3 | 2475 | |
ae82a8d0 MJ |
2476 | status = nfserr_req_too_big; |
2477 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2478 | goto out_put_session; |
ae82a8d0 | 2479 | |
b85d4c01 | 2480 | status = nfserr_badslot; |
6c18ba9f | 2481 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2482 | goto out_put_session; |
b85d4c01 | 2483 | |
557ce264 | 2484 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2485 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2486 | ||
a8dfdaeb AA |
2487 | /* We do not negotiate the number of slots yet, so set the |
2488 | * maxslots to the session maxreqs which is used to encode | |
2489 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2490 | seq->maxslots = session->se_fchannel.maxreqs; | |
2491 | ||
73e79482 BF |
2492 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2493 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2494 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2495 | status = nfserr_seq_misordered; |
2496 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2497 | goto out_put_session; |
b85d4c01 BH |
2498 | cstate->slot = slot; |
2499 | cstate->session = session; | |
4b24ca7d | 2500 | cstate->clp = clp; |
da3846a2 | 2501 | /* Return the cached reply status and set cstate->status |
557ce264 | 2502 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2503 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2504 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2505 | goto out; |
b85d4c01 BH |
2506 | } |
2507 | if (status) | |
66b2b9b2 | 2508 | goto out_put_session; |
b85d4c01 | 2509 | |
57266a6e | 2510 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2511 | conn = NULL; |
57266a6e BF |
2512 | if (status) |
2513 | goto out_put_session; | |
328ead28 | 2514 | |
47ee5298 BF |
2515 | buflen = (seq->cachethis) ? |
2516 | session->se_fchannel.maxresp_cached : | |
2517 | session->se_fchannel.maxresp_sz; | |
2518 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2519 | nfserr_rep_too_big; | |
a5cddc88 | 2520 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2521 | goto out_put_session; |
32aaa62e | 2522 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2523 | |
2524 | status = nfs_ok; | |
b85d4c01 | 2525 | /* Success! bump slot seqid */ |
b85d4c01 | 2526 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2527 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2528 | if (seq->cachethis) |
2529 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2530 | else |
2531 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2532 | |
2533 | cstate->slot = slot; | |
2534 | cstate->session = session; | |
4b24ca7d | 2535 | cstate->clp = clp; |
b85d4c01 | 2536 | |
b85d4c01 | 2537 | out: |
221a6876 BF |
2538 | switch (clp->cl_cb_state) { |
2539 | case NFSD4_CB_DOWN: | |
2540 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2541 | break; | |
2542 | case NFSD4_CB_FAULT: | |
2543 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2544 | break; | |
2545 | default: | |
2546 | seq->status_flags = 0; | |
aaf84eb9 | 2547 | } |
3bd64a5b BF |
2548 | if (!list_empty(&clp->cl_revoked)) |
2549 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2550 | out_no_session: |
3f42d2c4 KM |
2551 | if (conn) |
2552 | free_conn(conn); | |
c9a49628 | 2553 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2554 | return status; |
66b2b9b2 | 2555 | out_put_session: |
d4e19e70 | 2556 | nfsd4_put_session_locked(session); |
221a6876 | 2557 | goto out_no_session; |
069b6ad4 AA |
2558 | } |
2559 | ||
b607664e TM |
2560 | void |
2561 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
2562 | { | |
2563 | struct nfsd4_compound_state *cs = &resp->cstate; | |
2564 | ||
2565 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
2566 | if (cs->status != nfserr_replay_cache) { |
2567 | nfsd4_store_cache_entry(resp); | |
2568 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
2569 | } | |
d4e19e70 | 2570 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 2571 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
2572 | } else if (cs->clp) |
2573 | put_client_renew(cs->clp); | |
b607664e TM |
2574 | } |
2575 | ||
345c2842 MJ |
2576 | __be32 |
2577 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2578 | { | |
2579 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2580 | __be32 status = 0; |
8daae4dc | 2581 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2582 | |
2583 | nfs4_lock_state(); | |
0a7ec377 | 2584 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2585 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2586 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2587 | |
2588 | if (conf) { | |
2589 | clp = conf; | |
2590 | ||
c0293b01 | 2591 | if (client_has_state(conf)) { |
345c2842 MJ |
2592 | status = nfserr_clientid_busy; |
2593 | goto out; | |
2594 | } | |
2595 | } else if (unconf) | |
2596 | clp = unconf; | |
2597 | else { | |
2598 | status = nfserr_stale_clientid; | |
2599 | goto out; | |
2600 | } | |
57266a6e BF |
2601 | if (!mach_creds_match(clp, rqstp)) { |
2602 | status = nfserr_wrong_cred; | |
2603 | goto out; | |
2604 | } | |
345c2842 MJ |
2605 | expire_client(clp); |
2606 | out: | |
2607 | nfs4_unlock_state(); | |
345c2842 MJ |
2608 | return status; |
2609 | } | |
2610 | ||
4dc6ec00 BF |
2611 | __be32 |
2612 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2613 | { | |
57b7b43b | 2614 | __be32 status = 0; |
bcecf1cc | 2615 | |
4dc6ec00 BF |
2616 | if (rc->rca_one_fs) { |
2617 | if (!cstate->current_fh.fh_dentry) | |
2618 | return nfserr_nofilehandle; | |
2619 | /* | |
2620 | * We don't take advantage of the rca_one_fs case. | |
2621 | * That's OK, it's optional, we can safely ignore it. | |
2622 | */ | |
2623 | return nfs_ok; | |
2624 | } | |
bcecf1cc | 2625 | |
4dc6ec00 | 2626 | nfs4_lock_state(); |
bcecf1cc | 2627 | status = nfserr_complete_already; |
a52d726b JL |
2628 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2629 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2630 | goto out; |
2631 | ||
2632 | status = nfserr_stale_clientid; | |
2633 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2634 | /* |
2635 | * The following error isn't really legal. | |
2636 | * But we only get here if the client just explicitly | |
2637 | * destroyed the client. Surely it no longer cares what | |
2638 | * error it gets back on an operation for the dead | |
2639 | * client. | |
2640 | */ | |
bcecf1cc MJ |
2641 | goto out; |
2642 | ||
2643 | status = nfs_ok; | |
2a4317c5 | 2644 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2645 | out: |
4dc6ec00 | 2646 | nfs4_unlock_state(); |
bcecf1cc | 2647 | return status; |
4dc6ec00 BF |
2648 | } |
2649 | ||
b37ad28b | 2650 | __be32 |
b591480b BF |
2651 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2652 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2653 | { |
a084daf5 | 2654 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2655 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2656 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2657 | __be32 status; |
c212cecf SK |
2658 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2659 | ||
63db4632 | 2660 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2661 | nfs4_lock_state(); |
382a62e7 | 2662 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2663 | if (conf) { |
63db4632 | 2664 | /* case 0: */ |
1da177e4 | 2665 | status = nfserr_clid_inuse; |
e203d506 BF |
2666 | if (clp_used_exchangeid(conf)) |
2667 | goto out; | |
026722c2 | 2668 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2669 | char addr_str[INET6_ADDRSTRLEN]; |
2670 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2671 | sizeof(addr_str)); | |
2672 | dprintk("NFSD: setclientid: string in use by client " | |
2673 | "at %s\n", addr_str); | |
1da177e4 LT |
2674 | goto out; |
2675 | } | |
1da177e4 | 2676 | } |
a99454aa | 2677 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2678 | if (unconf) |
2679 | expire_client(unconf); | |
3e772463 | 2680 | status = nfserr_jukebox; |
2216d449 | 2681 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2682 | if (new == NULL) |
2683 | goto out; | |
34b232bb | 2684 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2685 | /* case 1: probable callback update */ |
1da177e4 | 2686 | copy_clid(new, conf); |
34b232bb | 2687 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2688 | gen_clid(new, nn); |
8323c3b2 | 2689 | new->cl_minorversion = 0; |
6f3d772f | 2690 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2691 | add_to_unconfirmed(new); |
1da177e4 LT |
2692 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2693 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2694 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2695 | status = nfs_ok; | |
2696 | out: | |
2697 | nfs4_unlock_state(); | |
2698 | return status; | |
2699 | } | |
2700 | ||
2701 | ||
b37ad28b | 2702 | __be32 |
b591480b BF |
2703 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2704 | struct nfsd4_compound_state *cstate, | |
2705 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2706 | { |
21ab45a4 | 2707 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2708 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2709 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2710 | __be32 status; |
7f2210fa | 2711 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2712 | |
2c142baa | 2713 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2714 | return nfserr_stale_clientid; |
1da177e4 | 2715 | nfs4_lock_state(); |
21ab45a4 | 2716 | |
8daae4dc | 2717 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2718 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2719 | /* |
8695b90a BF |
2720 | * We try hard to give out unique clientid's, so if we get an |
2721 | * attempt to confirm the same clientid with a different cred, | |
2722 | * there's a bug somewhere. Let's charitably assume it's our | |
2723 | * bug. | |
a186e767 | 2724 | */ |
8695b90a BF |
2725 | status = nfserr_serverfault; |
2726 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2727 | goto out; | |
2728 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2729 | goto out; | |
63db4632 | 2730 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2731 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2732 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2733 | status = nfs_ok; |
90d700b7 BF |
2734 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2735 | status = nfserr_stale_clientid; | |
2736 | goto out; | |
2737 | } | |
2738 | status = nfs_ok; | |
2739 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2740 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2741 | nfsd4_probe_callback(conf); | |
2742 | expire_client(unconf); | |
90d700b7 | 2743 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2744 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2745 | if (conf) { |
2746 | status = mark_client_expired(conf); | |
2747 | if (status) | |
2748 | goto out; | |
8695b90a | 2749 | expire_client(conf); |
221a6876 | 2750 | } |
8695b90a | 2751 | move_to_confirmed(unconf); |
f3d03b92 | 2752 | nfsd4_probe_callback(unconf); |
08e8987c | 2753 | } |
1da177e4 | 2754 | out: |
1da177e4 LT |
2755 | nfs4_unlock_state(); |
2756 | return status; | |
2757 | } | |
2758 | ||
32513b40 BF |
2759 | static struct nfs4_file *nfsd4_alloc_file(void) |
2760 | { | |
2761 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2762 | } | |
2763 | ||
1da177e4 | 2764 | /* OPEN Share state helper functions */ |
32513b40 | 2765 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2766 | { |
1da177e4 LT |
2767 | unsigned int hashval = file_hashval(ino); |
2768 | ||
950e0118 TM |
2769 | lockdep_assert_held(&state_lock); |
2770 | ||
32513b40 | 2771 | atomic_set(&fp->fi_ref, 1); |
1d31a253 | 2772 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
2773 | INIT_LIST_HEAD(&fp->fi_stateids); |
2774 | INIT_LIST_HEAD(&fp->fi_delegations); | |
950e0118 TM |
2775 | ihold(ino); |
2776 | fp->fi_inode = ino; | |
32513b40 BF |
2777 | fp->fi_had_conflict = false; |
2778 | fp->fi_lease = NULL; | |
2779 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2780 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
89876f8c | 2781 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
2782 | } |
2783 | ||
e8ff2a84 | 2784 | void |
1da177e4 LT |
2785 | nfsd4_free_slabs(void) |
2786 | { | |
abf1135b CH |
2787 | kmem_cache_destroy(openowner_slab); |
2788 | kmem_cache_destroy(lockowner_slab); | |
2789 | kmem_cache_destroy(file_slab); | |
2790 | kmem_cache_destroy(stateid_slab); | |
2791 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2792 | } |
1da177e4 | 2793 | |
72083396 | 2794 | int |
e60d4398 N |
2795 | nfsd4_init_slabs(void) |
2796 | { | |
fe0750e5 BF |
2797 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2798 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2799 | if (openowner_slab == NULL) | |
abf1135b | 2800 | goto out; |
fe0750e5 | 2801 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2802 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2803 | if (lockowner_slab == NULL) |
abf1135b | 2804 | goto out_free_openowner_slab; |
e60d4398 | 2805 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2806 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2807 | if (file_slab == NULL) |
abf1135b | 2808 | goto out_free_lockowner_slab; |
5ac049ac | 2809 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2810 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2811 | if (stateid_slab == NULL) |
abf1135b | 2812 | goto out_free_file_slab; |
5b2d21c1 | 2813 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2814 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2815 | if (deleg_slab == NULL) |
abf1135b | 2816 | goto out_free_stateid_slab; |
e60d4398 | 2817 | return 0; |
abf1135b CH |
2818 | |
2819 | out_free_stateid_slab: | |
2820 | kmem_cache_destroy(stateid_slab); | |
2821 | out_free_file_slab: | |
2822 | kmem_cache_destroy(file_slab); | |
2823 | out_free_lockowner_slab: | |
2824 | kmem_cache_destroy(lockowner_slab); | |
2825 | out_free_openowner_slab: | |
2826 | kmem_cache_destroy(openowner_slab); | |
2827 | out: | |
e60d4398 N |
2828 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2829 | return -ENOMEM; | |
1da177e4 LT |
2830 | } |
2831 | ||
ff194bd9 | 2832 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2833 | { |
ff194bd9 BF |
2834 | rp->rp_status = nfserr_serverfault; |
2835 | rp->rp_buflen = 0; | |
2836 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2837 | } |
2838 | ||
fe0750e5 | 2839 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2840 | { |
1da177e4 | 2841 | struct nfs4_stateowner *sop; |
1da177e4 | 2842 | |
fe0750e5 | 2843 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2844 | if (!sop) |
2845 | return NULL; | |
2846 | ||
2847 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2848 | if (!sop->so_owner.data) { | |
fe0750e5 | 2849 | kmem_cache_free(slab, sop); |
1da177e4 | 2850 | return NULL; |
ff194bd9 BF |
2851 | } |
2852 | sop->so_owner.len = owner->len; | |
2853 | ||
ea1da636 | 2854 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2855 | sop->so_client = clp; |
2856 | init_nfs4_replay(&sop->so_replay); | |
2857 | return sop; | |
2858 | } | |
2859 | ||
fe0750e5 | 2860 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2861 | { |
9b531137 SK |
2862 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2863 | ||
2864 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2865 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2866 | } |
2867 | ||
fe0750e5 | 2868 | static struct nfs4_openowner * |
13d6f66b | 2869 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
2870 | struct nfsd4_compound_state *cstate) |
2871 | { | |
13d6f66b | 2872 | struct nfs4_client *clp = cstate->clp; |
fe0750e5 | 2873 | struct nfs4_openowner *oo; |
ff194bd9 | 2874 | |
fe0750e5 BF |
2875 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2876 | if (!oo) | |
ff194bd9 | 2877 | return NULL; |
fe0750e5 BF |
2878 | oo->oo_owner.so_is_open_owner = 1; |
2879 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2880 | oo->oo_flags = NFS4_OO_NEW; |
db24b3b4 JL |
2881 | if (nfsd4_has_session(cstate)) |
2882 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 2883 | oo->oo_time = 0; |
38c387b5 | 2884 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2885 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2886 | hash_openowner(oo, clp, strhashval); | |
2887 | return oo; | |
1da177e4 LT |
2888 | } |
2889 | ||
996e0938 | 2890 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2891 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2892 | |
3abdb607 | 2893 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 2894 | INIT_LIST_HEAD(&stp->st_locks); |
fe0750e5 | 2895 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
fe0750e5 | 2896 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2897 | get_nfs4_file(fp); |
1da177e4 | 2898 | stp->st_file = fp; |
1da177e4 LT |
2899 | stp->st_access_bmap = 0; |
2900 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2901 | set_access(open->op_share_access, stp); |
ce0fc43c | 2902 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2903 | stp->st_openstp = NULL; |
1d31a253 TM |
2904 | spin_lock(&fp->fi_lock); |
2905 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
2906 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
2907 | } |
2908 | ||
fd39ca9a | 2909 | static void |
73758fed | 2910 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2911 | { |
73758fed SK |
2912 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2913 | ||
fe0750e5 | 2914 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2915 | |
73758fed | 2916 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2917 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2918 | } |
2919 | ||
1da177e4 | 2920 | static int |
599e0a22 BF |
2921 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2922 | clientid_t *clid) | |
2923 | { | |
2924 | return (sop->so_owner.len == owner->len) && | |
2925 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2926 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2927 | } |
2928 | ||
fe0750e5 | 2929 | static struct nfs4_openowner * |
9b531137 SK |
2930 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2931 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2932 | { |
a50d2ad1 BF |
2933 | struct nfs4_stateowner *so; |
2934 | struct nfs4_openowner *oo; | |
d15c077e | 2935 | struct nfs4_client *clp; |
1da177e4 | 2936 | |
9b531137 | 2937 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2938 | if (!so->so_is_open_owner) |
2939 | continue; | |
a50d2ad1 BF |
2940 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2941 | oo = openowner(so); | |
d15c077e BF |
2942 | clp = oo->oo_owner.so_client; |
2943 | if ((bool)clp->cl_minorversion != sessions) | |
2944 | return NULL; | |
a50d2ad1 BF |
2945 | renew_client(oo->oo_owner.so_client); |
2946 | return oo; | |
2947 | } | |
1da177e4 LT |
2948 | } |
2949 | return NULL; | |
2950 | } | |
2951 | ||
2952 | /* search file_hashtbl[] for file */ | |
2953 | static struct nfs4_file * | |
950e0118 | 2954 | find_file_locked(struct inode *ino) |
1da177e4 LT |
2955 | { |
2956 | unsigned int hashval = file_hashval(ino); | |
2957 | struct nfs4_file *fp; | |
2958 | ||
950e0118 TM |
2959 | lockdep_assert_held(&state_lock); |
2960 | ||
89876f8c | 2961 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2962 | if (fp->fi_inode == ino) { |
2963 | get_nfs4_file(fp); | |
1da177e4 | 2964 | return fp; |
13cd2184 | 2965 | } |
1da177e4 LT |
2966 | } |
2967 | return NULL; | |
2968 | } | |
2969 | ||
950e0118 TM |
2970 | static struct nfs4_file * |
2971 | find_file(struct inode *ino) | |
2972 | { | |
2973 | struct nfs4_file *fp; | |
2974 | ||
2975 | spin_lock(&state_lock); | |
2976 | fp = find_file_locked(ino); | |
2977 | spin_unlock(&state_lock); | |
2978 | return fp; | |
2979 | } | |
2980 | ||
2981 | static struct nfs4_file * | |
2982 | find_or_add_file(struct inode *ino, struct nfs4_file *new) | |
2983 | { | |
2984 | struct nfs4_file *fp; | |
2985 | ||
2986 | spin_lock(&state_lock); | |
2987 | fp = find_file_locked(ino); | |
2988 | if (fp == NULL) { | |
2989 | nfsd4_init_file(new, ino); | |
2990 | fp = new; | |
2991 | } | |
2992 | spin_unlock(&state_lock); | |
2993 | ||
2994 | return fp; | |
2995 | } | |
2996 | ||
1da177e4 LT |
2997 | /* |
2998 | * Called to check deny when READ with all zero stateid or | |
2999 | * WRITE with all zero or all one stateid | |
3000 | */ | |
b37ad28b | 3001 | static __be32 |
1da177e4 LT |
3002 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
3003 | { | |
3004 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
3005 | struct nfs4_file *fp; | |
dcef0413 | 3006 | struct nfs4_ol_stateid *stp; |
b37ad28b | 3007 | __be32 ret; |
1da177e4 | 3008 | |
1da177e4 | 3009 | fp = find_file(ino); |
13cd2184 N |
3010 | if (!fp) |
3011 | return nfs_ok; | |
b700949b | 3012 | ret = nfserr_locked; |
1da177e4 | 3013 | /* Search for conflicting share reservations */ |
1d31a253 | 3014 | spin_lock(&fp->fi_lock); |
13cd2184 | 3015 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
3016 | if (test_deny(deny_type, stp) || |
3017 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 3018 | goto out; |
1da177e4 | 3019 | } |
13cd2184 N |
3020 | ret = nfs_ok; |
3021 | out: | |
1d31a253 | 3022 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
3023 | put_nfs4_file(fp); |
3024 | return ret; | |
1da177e4 LT |
3025 | } |
3026 | ||
6b57d9c8 | 3027 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 3028 | { |
e8c69d17 BF |
3029 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
3030 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
3031 | ||
cdc97505 | 3032 | lockdep_assert_held(&state_lock); |
1da177e4 LT |
3033 | /* We're assuming the state code never drops its reference |
3034 | * without first removing the lease. Since we're in this lease | |
3035 | * callback (and since the lease code is serialized by the kernel | |
3036 | * lock) we know the server hasn't removed the lease yet, we know | |
3037 | * it's safe to take a reference: */ | |
3038 | atomic_inc(&dp->dl_count); | |
3039 | ||
dff1399f JL |
3040 | /* |
3041 | * If the dl_time != 0, then we know that it has already been | |
3042 | * queued for a lease break. Don't queue it again. | |
3043 | */ | |
3044 | if (dp->dl_time == 0) { | |
3045 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); | |
3046 | dp->dl_time = get_seconds(); | |
3047 | } | |
1da177e4 | 3048 | |
6282cd56 N |
3049 | block_delegations(&dp->dl_fh); |
3050 | ||
6b57d9c8 BF |
3051 | nfsd4_cb_recall(dp); |
3052 | } | |
3053 | ||
1c8c601a | 3054 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
3055 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
3056 | { | |
acfdf5c3 BF |
3057 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
3058 | struct nfs4_delegation *dp; | |
6b57d9c8 | 3059 | |
7fa10cd1 BF |
3060 | if (!fp) { |
3061 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
3062 | return; | |
3063 | } | |
3064 | if (fp->fi_had_conflict) { | |
3065 | WARN(1, "duplicate break on %p\n", fp); | |
3066 | return; | |
3067 | } | |
0272e1fd BF |
3068 | /* |
3069 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 3070 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 3071 | * in time: |
0272e1fd BF |
3072 | */ |
3073 | fl->fl_break_time = 0; | |
1da177e4 | 3074 | |
cdc97505 | 3075 | spin_lock(&state_lock); |
acfdf5c3 BF |
3076 | fp->fi_had_conflict = true; |
3077 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
3078 | nfsd_break_one_deleg(dp); | |
cdc97505 | 3079 | spin_unlock(&state_lock); |
1da177e4 LT |
3080 | } |
3081 | ||
1da177e4 LT |
3082 | static |
3083 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
3084 | { | |
3085 | if (arg & F_UNLCK) | |
3086 | return lease_modify(onlist, arg); | |
3087 | else | |
3088 | return -EAGAIN; | |
3089 | } | |
3090 | ||
7b021967 | 3091 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
3092 | .lm_break = nfsd_break_deleg_cb, |
3093 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
3094 | }; |
3095 | ||
7a8711c9 BF |
3096 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
3097 | { | |
3098 | if (nfsd4_has_session(cstate)) | |
3099 | return nfs_ok; | |
3100 | if (seqid == so->so_seqid - 1) | |
3101 | return nfserr_replay_me; | |
3102 | if (seqid == so->so_seqid) | |
3103 | return nfs_ok; | |
3104 | return nfserr_bad_seqid; | |
3105 | } | |
1da177e4 | 3106 | |
4b24ca7d JL |
3107 | static __be32 lookup_clientid(clientid_t *clid, |
3108 | struct nfsd4_compound_state *cstate, | |
3109 | struct nfsd_net *nn) | |
3110 | { | |
3111 | struct nfs4_client *found; | |
3112 | ||
3113 | if (cstate->clp) { | |
3114 | found = cstate->clp; | |
3115 | if (!same_clid(&found->cl_clientid, clid)) | |
3116 | return nfserr_stale_clientid; | |
3117 | return nfs_ok; | |
3118 | } | |
3119 | ||
3120 | if (STALE_CLIENTID(clid, nn)) | |
3121 | return nfserr_stale_clientid; | |
3122 | ||
3123 | /* | |
3124 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
3125 | * cached already then we know this is for is for v4.0 and "sessions" | |
3126 | * will be false. | |
3127 | */ | |
3128 | WARN_ON_ONCE(cstate->session); | |
3129 | found = find_confirmed_client(clid, false, nn); | |
3130 | if (!found) | |
3131 | return nfserr_expired; | |
3132 | ||
3133 | /* Cache the nfs4_client in cstate! */ | |
3134 | cstate->clp = found; | |
3135 | atomic_inc(&found->cl_refcount); | |
3136 | return nfs_ok; | |
3137 | } | |
3138 | ||
b37ad28b | 3139 | __be32 |
6668958f | 3140 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 3141 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 3142 | { |
1da177e4 LT |
3143 | clientid_t *clientid = &open->op_clientid; |
3144 | struct nfs4_client *clp = NULL; | |
3145 | unsigned int strhashval; | |
fe0750e5 | 3146 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 3147 | __be32 status; |
1da177e4 | 3148 | |
2c142baa | 3149 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 3150 | return nfserr_stale_clientid; |
32513b40 BF |
3151 | /* |
3152 | * In case we need it later, after we've already created the | |
3153 | * file and don't want to risk a further failure: | |
3154 | */ | |
3155 | open->op_file = nfsd4_alloc_file(); | |
3156 | if (open->op_file == NULL) | |
3157 | return nfserr_jukebox; | |
1da177e4 | 3158 | |
2d91e895 TM |
3159 | status = lookup_clientid(clientid, cstate, nn); |
3160 | if (status) | |
3161 | return status; | |
3162 | clp = cstate->clp; | |
3163 | ||
16bfdaaf | 3164 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 3165 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
3166 | open->op_openowner = oo; |
3167 | if (!oo) { | |
bcf130f9 | 3168 | goto new_owner; |
1da177e4 | 3169 | } |
dad1c067 | 3170 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 3171 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
3172 | release_openowner(oo); |
3173 | open->op_openowner = NULL; | |
bcf130f9 | 3174 | goto new_owner; |
0f442aa2 | 3175 | } |
4cdc951b BF |
3176 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
3177 | if (status) | |
3178 | return status; | |
4cdc951b | 3179 | goto alloc_stateid; |
bcf130f9 | 3180 | new_owner: |
13d6f66b | 3181 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
3182 | if (oo == NULL) |
3183 | return nfserr_jukebox; | |
3184 | open->op_openowner = oo; | |
4cdc951b BF |
3185 | alloc_stateid: |
3186 | open->op_stp = nfs4_alloc_stateid(clp); | |
3187 | if (!open->op_stp) | |
3188 | return nfserr_jukebox; | |
0f442aa2 | 3189 | return nfs_ok; |
1da177e4 LT |
3190 | } |
3191 | ||
b37ad28b | 3192 | static inline __be32 |
4a6e43e6 N |
3193 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
3194 | { | |
3195 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
3196 | return nfserr_openmode; | |
3197 | else | |
3198 | return nfs_ok; | |
3199 | } | |
3200 | ||
f459e453 | 3201 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 3202 | { |
f459e453 | 3203 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
3204 | } |
3205 | ||
38c2f4b1 | 3206 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 3207 | { |
f459e453 | 3208 | struct nfs4_stid *ret; |
24a0111e | 3209 | |
38c2f4b1 | 3210 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
3211 | if (!ret) |
3212 | return NULL; | |
3213 | return delegstateid(ret); | |
24a0111e BF |
3214 | } |
3215 | ||
8b289b2c BF |
3216 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
3217 | { | |
3218 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
3219 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
3220 | } | |
3221 | ||
b37ad28b | 3222 | static __be32 |
41d22663 | 3223 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
3224 | struct nfs4_delegation **dp) |
3225 | { | |
3226 | int flags; | |
b37ad28b | 3227 | __be32 status = nfserr_bad_stateid; |
567d9829 | 3228 | |
38c2f4b1 | 3229 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 3230 | if (*dp == NULL) |
c44c5eeb | 3231 | goto out; |
24a0111e | 3232 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3233 | status = nfs4_check_delegmode(*dp, flags); |
3234 | if (status) | |
3235 | *dp = NULL; | |
c44c5eeb | 3236 | out: |
8b289b2c | 3237 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3238 | return nfs_ok; |
3239 | if (status) | |
3240 | return status; | |
dad1c067 | 3241 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3242 | return nfs_ok; |
567d9829 N |
3243 | } |
3244 | ||
b37ad28b | 3245 | static __be32 |
dcef0413 | 3246 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 3247 | { |
dcef0413 | 3248 | struct nfs4_ol_stateid *local; |
fe0750e5 | 3249 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3250 | |
1d31a253 | 3251 | spin_lock(&fp->fi_lock); |
8beefa24 | 3252 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3253 | /* ignore lock owners */ |
3254 | if (local->st_stateowner->so_is_open_owner == 0) | |
3255 | continue; | |
3256 | /* remember if we have seen this open owner */ | |
fe0750e5 | 3257 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
3258 | *stpp = local; |
3259 | /* check for conflicting share reservations */ | |
1d31a253 TM |
3260 | if (!test_share(local, open)) { |
3261 | spin_unlock(&fp->fi_lock); | |
77eaae8d | 3262 | return nfserr_share_denied; |
1d31a253 | 3263 | } |
1da177e4 | 3264 | } |
1d31a253 | 3265 | spin_unlock(&fp->fi_lock); |
77eaae8d | 3266 | return nfs_ok; |
1da177e4 LT |
3267 | } |
3268 | ||
21fb4016 BF |
3269 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3270 | { | |
3271 | int flags = 0; | |
3272 | ||
3273 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3274 | flags |= NFSD_MAY_READ; | |
3275 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3276 | flags |= NFSD_MAY_WRITE; | |
3277 | return flags; | |
3278 | } | |
3279 | ||
7e6a72e5 CH |
3280 | static inline __be32 |
3281 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
3282 | struct nfsd4_open *open) | |
3283 | { | |
3284 | struct iattr iattr = { | |
3285 | .ia_valid = ATTR_SIZE, | |
3286 | .ia_size = 0, | |
3287 | }; | |
3288 | if (!open->op_truncate) | |
3289 | return 0; | |
3290 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
3291 | return nfserr_inval; | |
3292 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
3293 | } | |
3294 | ||
0c12eaff CB |
3295 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
3296 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f | 3297 | { |
de18643d | 3298 | struct file *filp = NULL; |
f9d7562f | 3299 | __be32 status; |
0c12eaff CB |
3300 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3301 | int access = nfs4_access_to_access(open->op_share_access); | |
3302 | ||
de18643d | 3303 | spin_lock(&fp->fi_lock); |
f9d7562f | 3304 | if (!fp->fi_fds[oflag]) { |
de18643d TM |
3305 | spin_unlock(&fp->fi_lock); |
3306 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); | |
f9d7562f | 3307 | if (status) |
7e6a72e5 | 3308 | goto out; |
de18643d TM |
3309 | spin_lock(&fp->fi_lock); |
3310 | if (!fp->fi_fds[oflag]) { | |
3311 | fp->fi_fds[oflag] = filp; | |
3312 | filp = NULL; | |
3313 | } | |
f9d7562f | 3314 | } |
12659651 | 3315 | status = nfs4_file_get_access(fp, open->op_share_access); |
de18643d TM |
3316 | spin_unlock(&fp->fi_lock); |
3317 | if (filp) | |
3318 | fput(filp); | |
12659651 JL |
3319 | if (status) |
3320 | goto out_put_access; | |
f9d7562f | 3321 | |
7e6a72e5 CH |
3322 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3323 | if (status) | |
3324 | goto out_put_access; | |
3325 | ||
f9d7562f | 3326 | return nfs_ok; |
f9d7562f | 3327 | |
7e6a72e5 | 3328 | out_put_access: |
12659651 | 3329 | nfs4_file_put_access(fp, open->op_share_access); |
7e6a72e5 CH |
3330 | out: |
3331 | return status; | |
1da177e4 LT |
3332 | } |
3333 | ||
b37ad28b | 3334 | static __be32 |
dcef0413 | 3335 | 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 | 3336 | { |
b6d2f1ca | 3337 | u32 op_share_access = open->op_share_access; |
b37ad28b | 3338 | __be32 status; |
1da177e4 | 3339 | |
7e6a72e5 | 3340 | if (!test_access(op_share_access, stp)) |
0c12eaff | 3341 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
7e6a72e5 CH |
3342 | else |
3343 | status = nfsd4_truncate(rqstp, cur_fh, open); | |
3344 | ||
3345 | if (status) | |
1da177e4 | 3346 | return status; |
7e6a72e5 | 3347 | |
1da177e4 | 3348 | /* remember the open */ |
82c5ff1b | 3349 | set_access(op_share_access, stp); |
ce0fc43c | 3350 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
3351 | return nfs_ok; |
3352 | } | |
3353 | ||
3354 | ||
1da177e4 | 3355 | static void |
1255a8f3 | 3356 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3357 | { |
dad1c067 | 3358 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3359 | } |
3360 | ||
14a24e99 BF |
3361 | /* Should we give out recallable state?: */ |
3362 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3363 | { | |
3364 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3365 | return true; | |
3366 | /* | |
3367 | * In the sessions case, since we don't have to establish a | |
3368 | * separate connection for callbacks, we assume it's OK | |
3369 | * until we hear otherwise: | |
3370 | */ | |
3371 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3372 | } | |
3373 | ||
22d38c4c BF |
3374 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3375 | { | |
3376 | struct file_lock *fl; | |
3377 | ||
3378 | fl = locks_alloc_lock(); | |
3379 | if (!fl) | |
3380 | return NULL; | |
3381 | locks_init_lock(fl); | |
3382 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3383 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3384 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3385 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3386 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3387 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3388 | return fl; |
3389 | } | |
3390 | ||
99c41515 | 3391 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3392 | { |
acfdf5c3 | 3393 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3394 | struct file_lock *fl; |
3395 | int status; | |
3396 | ||
99c41515 | 3397 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3398 | if (!fl) |
3399 | return -ENOMEM; | |
acfdf5c3 | 3400 | fl->fl_file = find_readable_file(fp); |
acfdf5c3 | 3401 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
e873088f BF |
3402 | if (status) |
3403 | goto out_free; | |
acfdf5c3 | 3404 | fp->fi_lease = fl; |
de18643d | 3405 | fp->fi_deleg_file = fl->fl_file; |
acfdf5c3 | 3406 | atomic_set(&fp->fi_delegees, 1); |
cdc97505 | 3407 | spin_lock(&state_lock); |
931ee56c | 3408 | hash_delegation_locked(dp, fp); |
cdc97505 | 3409 | spin_unlock(&state_lock); |
acfdf5c3 | 3410 | return 0; |
e873088f | 3411 | out_free: |
de18643d TM |
3412 | if (fl->fl_file) |
3413 | fput(fl->fl_file); | |
e873088f BF |
3414 | locks_free_lock(fl); |
3415 | return status; | |
acfdf5c3 BF |
3416 | } |
3417 | ||
bf7bd3e9 | 3418 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3419 | { |
bf7bd3e9 BF |
3420 | if (fp->fi_had_conflict) |
3421 | return -EAGAIN; | |
3422 | get_nfs4_file(fp); | |
3423 | dp->dl_file = fp; | |
cbf7a75b BF |
3424 | if (!fp->fi_lease) |
3425 | return nfs4_setlease(dp); | |
cdc97505 | 3426 | spin_lock(&state_lock); |
cbf7a75b | 3427 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3428 | if (fp->fi_had_conflict) { |
cdc97505 | 3429 | spin_unlock(&state_lock); |
cbf7a75b | 3430 | return -EAGAIN; |
acfdf5c3 | 3431 | } |
931ee56c | 3432 | hash_delegation_locked(dp, fp); |
cdc97505 | 3433 | spin_unlock(&state_lock); |
edab9782 BF |
3434 | return 0; |
3435 | } | |
3436 | ||
4aa8913c BH |
3437 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3438 | { | |
3439 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3440 | if (status == -EAGAIN) | |
3441 | open->op_why_no_deleg = WND4_CONTENTION; | |
3442 | else { | |
3443 | open->op_why_no_deleg = WND4_RESOURCE; | |
3444 | switch (open->op_deleg_want) { | |
3445 | case NFS4_SHARE_WANT_READ_DELEG: | |
3446 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3447 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3448 | break; | |
3449 | case NFS4_SHARE_WANT_CANCEL: | |
3450 | open->op_why_no_deleg = WND4_CANCELLED; | |
3451 | break; | |
3452 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3453 | WARN_ON_ONCE(1); |
4aa8913c BH |
3454 | } |
3455 | } | |
3456 | } | |
3457 | ||
1da177e4 LT |
3458 | /* |
3459 | * Attempt to hand out a delegation. | |
99c41515 BF |
3460 | * |
3461 | * Note we don't support write delegations, and won't until the vfs has | |
3462 | * proper support for them. | |
1da177e4 LT |
3463 | */ |
3464 | static void | |
5ccb0066 SK |
3465 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3466 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3467 | { |
3468 | struct nfs4_delegation *dp; | |
fe0750e5 | 3469 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3470 | int cb_up; |
99c41515 | 3471 | int status = 0; |
1da177e4 | 3472 | |
fe0750e5 | 3473 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3474 | open->op_recall = 0; |
3475 | switch (open->op_claim_type) { | |
3476 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3477 | if (!cb_up) |
7b190fec | 3478 | open->op_recall = 1; |
99c41515 BF |
3479 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3480 | goto out_no_deleg; | |
7b190fec N |
3481 | break; |
3482 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3483 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3484 | /* |
3485 | * Let's not give out any delegations till everyone's | |
3486 | * had the chance to reclaim theirs.... | |
3487 | */ | |
5ccb0066 | 3488 | if (locks_in_grace(net)) |
99c41515 | 3489 | goto out_no_deleg; |
dad1c067 | 3490 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3491 | goto out_no_deleg; |
9a0590ae SD |
3492 | /* |
3493 | * Also, if the file was opened for write or | |
3494 | * create, there's a good chance the client's | |
3495 | * about to write to it, resulting in an | |
3496 | * immediate recall (since we don't support | |
3497 | * write delegations): | |
3498 | */ | |
7b190fec | 3499 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3500 | goto out_no_deleg; |
3501 | if (open->op_create == NFS4_OPEN_CREATE) | |
3502 | goto out_no_deleg; | |
7b190fec N |
3503 | break; |
3504 | default: | |
99c41515 | 3505 | goto out_no_deleg; |
7b190fec | 3506 | } |
99c41515 | 3507 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3508 | if (dp == NULL) |
3509 | goto out_no_deleg; | |
bf7bd3e9 | 3510 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3511 | if (status) |
dd239cc0 | 3512 | goto out_free; |
1da177e4 | 3513 | |
d5477a8d | 3514 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3515 | |
8c10cbdb | 3516 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3517 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3518 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3519 | return; |
3520 | out_free: | |
cbf7a75b | 3521 | destroy_delegation(dp); |
dd239cc0 | 3522 | out_no_deleg: |
99c41515 BF |
3523 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3524 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3525 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3526 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3527 | open->op_recall = 1; |
3528 | } | |
99c41515 BF |
3529 | |
3530 | /* 4.1 client asking for a delegation? */ | |
3531 | if (open->op_deleg_want) | |
3532 | nfsd4_open_deleg_none_ext(open, status); | |
3533 | return; | |
1da177e4 LT |
3534 | } |
3535 | ||
e27f49c3 BH |
3536 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3537 | struct nfs4_delegation *dp) | |
3538 | { | |
3539 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3540 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3541 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3542 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3543 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3544 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3545 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3546 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3547 | } | |
3548 | /* Otherwise the client must be confused wanting a delegation | |
3549 | * it already has, therefore we don't return | |
3550 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3551 | */ | |
3552 | } | |
3553 | ||
1da177e4 LT |
3554 | /* |
3555 | * called with nfs4_lock_state() held. | |
3556 | */ | |
b37ad28b | 3557 | __be32 |
1da177e4 LT |
3558 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3559 | { | |
6668958f | 3560 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3561 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3562 | struct nfs4_file *fp = NULL; |
3563 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3564 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3565 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3566 | __be32 status; |
1da177e4 | 3567 | |
1da177e4 LT |
3568 | /* |
3569 | * Lookup file; if found, lookup stateid and check open request, | |
3570 | * and check for delegations in the process of being recalled. | |
3571 | * If not found, create the nfs4_file struct | |
3572 | */ | |
950e0118 TM |
3573 | fp = find_or_add_file(ino, open->op_file); |
3574 | if (fp != open->op_file) { | |
1da177e4 LT |
3575 | if ((status = nfs4_check_open(fp, open, &stp))) |
3576 | goto out; | |
41d22663 | 3577 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3578 | if (status) |
3579 | goto out; | |
1da177e4 | 3580 | } else { |
950e0118 | 3581 | open->op_file = NULL; |
c44c5eeb | 3582 | status = nfserr_bad_stateid; |
8b289b2c | 3583 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3584 | goto out; |
3e772463 | 3585 | status = nfserr_jukebox; |
1da177e4 LT |
3586 | } |
3587 | ||
3588 | /* | |
3589 | * OPEN the file, or upgrade an existing OPEN. | |
3590 | * If truncate fails, the OPEN fails. | |
3591 | */ | |
3592 | if (stp) { | |
3593 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3594 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3595 | if (status) |
3596 | goto out; | |
3597 | } else { | |
4cdc951b | 3598 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3599 | if (status) |
1da177e4 | 3600 | goto out; |
4cdc951b BF |
3601 | stp = open->op_stp; |
3602 | open->op_stp = NULL; | |
996e0938 | 3603 | init_open_stateid(stp, fp, open); |
1da177e4 | 3604 | } |
dcef0413 BF |
3605 | update_stateid(&stp->st_stid.sc_stateid); |
3606 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3607 | |
d24433cd | 3608 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
3609 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3610 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3611 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3612 | goto nodeleg; | |
3613 | } | |
3614 | } | |
3615 | ||
1da177e4 LT |
3616 | /* |
3617 | * Attempt to hand out a delegation. No error return, because the | |
3618 | * OPEN succeeds even if we fail. | |
3619 | */ | |
5ccb0066 | 3620 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3621 | nodeleg: |
1da177e4 LT |
3622 | status = nfs_ok; |
3623 | ||
8c10cbdb | 3624 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3625 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3626 | out: |
d24433cd BH |
3627 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3628 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3629 | open->op_deleg_want) |
3630 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3631 | |
13cd2184 N |
3632 | if (fp) |
3633 | put_nfs4_file(fp); | |
37515177 | 3634 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3635 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3636 | /* |
3637 | * To finish the open response, we just need to set the rflags. | |
3638 | */ | |
3639 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3640 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3641 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3642 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3643 | ||
3644 | return status; | |
3645 | } | |
3646 | ||
d29b20cd BF |
3647 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3648 | { | |
3649 | if (open->op_openowner) { | |
3650 | struct nfs4_openowner *oo = open->op_openowner; | |
3651 | ||
3652 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3653 | list_del_init(&oo->oo_close_lru); | |
3654 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3655 | if (status) { | |
3656 | release_openowner(oo); | |
3657 | open->op_openowner = NULL; | |
3658 | } else | |
3659 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3660 | } | |
3661 | } | |
32513b40 BF |
3662 | if (open->op_file) |
3663 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3664 | if (open->op_stp) |
ef79859e | 3665 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3666 | } |
3667 | ||
b37ad28b | 3668 | __be32 |
b591480b BF |
3669 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3670 | clientid_t *clid) | |
1da177e4 LT |
3671 | { |
3672 | struct nfs4_client *clp; | |
b37ad28b | 3673 | __be32 status; |
7f2210fa | 3674 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3675 | |
3676 | nfs4_lock_state(); | |
3677 | dprintk("process_renew(%08x/%08x): starting\n", | |
3678 | clid->cl_boot, clid->cl_id); | |
4b24ca7d | 3679 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b | 3680 | if (status) |
1da177e4 | 3681 | goto out; |
4b24ca7d | 3682 | clp = cstate->clp; |
1da177e4 | 3683 | status = nfserr_cb_path_down; |
ea1da636 | 3684 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3685 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3686 | goto out; |
3687 | status = nfs_ok; | |
3688 | out: | |
3689 | nfs4_unlock_state(); | |
3690 | return status; | |
3691 | } | |
3692 | ||
a76b4319 | 3693 | static void |
12760c66 | 3694 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3695 | { |
33dcc481 | 3696 | /* do nothing if grace period already ended */ |
a51c84ed | 3697 | if (nn->grace_ended) |
33dcc481 JL |
3698 | return; |
3699 | ||
a76b4319 | 3700 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3701 | nn->grace_ended = true; |
12760c66 | 3702 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3703 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3704 | /* |
3705 | * Now that every NFSv4 client has had the chance to recover and | |
3706 | * to see the (possibly new, possibly shorter) lease time, we | |
3707 | * can safely set the next grace time to the current lease time: | |
3708 | */ | |
5284b44e | 3709 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3710 | } |
3711 | ||
fd39ca9a | 3712 | static time_t |
09121281 | 3713 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3714 | { |
3715 | struct nfs4_client *clp; | |
fe0750e5 | 3716 | struct nfs4_openowner *oo; |
1da177e4 LT |
3717 | struct nfs4_delegation *dp; |
3718 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3719 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3720 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3721 | |
3722 | nfs4_lock_state(); | |
3723 | ||
3724 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3725 | nfsd4_end_grace(nn); |
36acb66b | 3726 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3727 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3728 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3729 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3730 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3731 | t = clp->cl_time - cutoff; | |
a832e7ae | 3732 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3733 | break; |
3734 | } | |
221a6876 | 3735 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3736 | dprintk("NFSD: client in use (clientid %08x)\n", |
3737 | clp->cl_clientid.cl_id); | |
3738 | continue; | |
3739 | } | |
221a6876 | 3740 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3741 | } |
c9a49628 | 3742 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3743 | list_for_each_safe(pos, next, &reaplist) { |
3744 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3745 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3746 | clp->cl_clientid.cl_id); | |
3747 | expire_client(clp); | |
3748 | } | |
cdc97505 | 3749 | spin_lock(&state_lock); |
e8c69d17 | 3750 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3751 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3752 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3753 | continue; | |
1da177e4 | 3754 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3755 | t = dp->dl_time - cutoff; |
3756 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3757 | break; |
3758 | } | |
1da177e4 LT |
3759 | list_move(&dp->dl_recall_lru, &reaplist); |
3760 | } | |
cdc97505 | 3761 | spin_unlock(&state_lock); |
1da177e4 LT |
3762 | list_for_each_safe(pos, next, &reaplist) { |
3763 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3764 | revoke_delegation(dp); |
1da177e4 | 3765 | } |
73758fed | 3766 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3767 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3768 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3769 | t = oo->oo_time - cutoff; |
3770 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3771 | break; |
3772 | } | |
fe0750e5 | 3773 | release_openowner(oo); |
1da177e4 | 3774 | } |
a832e7ae | 3775 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3776 | nfs4_unlock_state(); |
a832e7ae | 3777 | return new_timeo; |
1da177e4 LT |
3778 | } |
3779 | ||
a254b246 HH |
3780 | static struct workqueue_struct *laundry_wq; |
3781 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3782 | |
3783 | static void | |
09121281 | 3784 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3785 | { |
3786 | time_t t; | |
09121281 SK |
3787 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3788 | work); | |
3789 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3790 | laundromat_work); | |
1da177e4 | 3791 | |
09121281 | 3792 | t = nfs4_laundromat(nn); |
1da177e4 | 3793 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3794 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3795 | } |
3796 | ||
f7a4d872 | 3797 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3798 | { |
f7a4d872 BF |
3799 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3800 | return nfserr_bad_stateid; | |
3801 | return nfs_ok; | |
1da177e4 LT |
3802 | } |
3803 | ||
1da177e4 | 3804 | static inline int |
82c5ff1b | 3805 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3806 | { |
82c5ff1b JL |
3807 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3808 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3809 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3810 | } |
3811 | ||
3812 | static inline int | |
82c5ff1b | 3813 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3814 | { |
82c5ff1b JL |
3815 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3816 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3817 | } |
3818 | ||
3819 | static | |
dcef0413 | 3820 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3821 | { |
b37ad28b | 3822 | __be32 status = nfserr_openmode; |
1da177e4 | 3823 | |
02921914 BF |
3824 | /* For lock stateid's, we test the parent open, not the lock: */ |
3825 | if (stp->st_openstp) | |
3826 | stp = stp->st_openstp; | |
82c5ff1b | 3827 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3828 | goto out; |
82c5ff1b | 3829 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3830 | goto out; |
3831 | status = nfs_ok; | |
3832 | out: | |
3833 | return status; | |
3834 | } | |
3835 | ||
b37ad28b | 3836 | static inline __be32 |
5ccb0066 | 3837 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3838 | { |
203a8c8e | 3839 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3840 | return nfs_ok; |
5ccb0066 | 3841 | else if (locks_in_grace(net)) { |
25985edc | 3842 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3843 | * conflicting state; so we must wait out the grace period. */ |
3844 | return nfserr_grace; | |
3845 | } else if (flags & WR_STATE) | |
3846 | return nfs4_share_conflict(current_fh, | |
3847 | NFS4_SHARE_DENY_WRITE); | |
3848 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3849 | return nfs4_share_conflict(current_fh, | |
3850 | NFS4_SHARE_DENY_READ); | |
3851 | } | |
3852 | ||
3853 | /* | |
3854 | * Allow READ/WRITE during grace period on recovered state only for files | |
3855 | * that are not able to provide mandatory locking. | |
3856 | */ | |
3857 | static inline int | |
5ccb0066 | 3858 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3859 | { |
5ccb0066 | 3860 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3861 | } |
3862 | ||
81b82965 BF |
3863 | /* Returns true iff a is later than b: */ |
3864 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3865 | { | |
1a9357f4 | 3866 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3867 | } |
3868 | ||
57b7b43b | 3869 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3870 | { |
6668958f AA |
3871 | /* |
3872 | * When sessions are used the stateid generation number is ignored | |
3873 | * when it is zero. | |
3874 | */ | |
28dde241 | 3875 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3876 | return nfs_ok; |
3877 | ||
3878 | if (in->si_generation == ref->si_generation) | |
3879 | return nfs_ok; | |
6668958f | 3880 | |
0836f587 | 3881 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3882 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3883 | return nfserr_bad_stateid; |
3884 | /* | |
81b82965 BF |
3885 | * However, we could see a stateid from the past, even from a |
3886 | * non-buggy client. For example, if the client sends a lock | |
3887 | * while some IO is outstanding, the lock may bump si_generation | |
3888 | * while the IO is still in flight. The client could avoid that | |
3889 | * situation by waiting for responses on all the IO requests, | |
3890 | * but better performance may result in retrying IO that | |
3891 | * receives an old_stateid error if requests are rarely | |
3892 | * reordered in flight: | |
0836f587 | 3893 | */ |
81b82965 | 3894 | return nfserr_old_stateid; |
0836f587 BF |
3895 | } |
3896 | ||
7df302f7 | 3897 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3898 | { |
97b7e3b6 BF |
3899 | struct nfs4_stid *s; |
3900 | struct nfs4_ol_stateid *ols; | |
3901 | __be32 status; | |
17456804 | 3902 | |
7df302f7 CL |
3903 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3904 | return nfserr_bad_stateid; | |
3905 | /* Client debugging aid. */ | |
3906 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3907 | char addr_str[INET6_ADDRSTRLEN]; | |
3908 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3909 | sizeof(addr_str)); | |
3910 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3911 | "with incorrect client ID\n", addr_str); | |
3912 | return nfserr_bad_stateid; | |
3913 | } | |
38c2f4b1 | 3914 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3915 | if (!s) |
7df302f7 | 3916 | return nfserr_bad_stateid; |
36279ac1 | 3917 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3918 | if (status) |
97b7e3b6 | 3919 | return status; |
23340032 BF |
3920 | switch (s->sc_type) { |
3921 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3922 | return nfs_ok; |
3bd64a5b BF |
3923 | case NFS4_REVOKED_DELEG_STID: |
3924 | return nfserr_deleg_revoked; | |
23340032 BF |
3925 | case NFS4_OPEN_STID: |
3926 | case NFS4_LOCK_STID: | |
3927 | ols = openlockstateid(s); | |
3928 | if (ols->st_stateowner->so_is_open_owner | |
3929 | && !(openowner(ols->st_stateowner)->oo_flags | |
3930 | & NFS4_OO_CONFIRMED)) | |
3931 | return nfserr_bad_stateid; | |
97b7e3b6 | 3932 | return nfs_ok; |
23340032 BF |
3933 | default: |
3934 | printk("unknown stateid type %x\n", s->sc_type); | |
3935 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3936 | return nfserr_bad_stateid; |
23340032 | 3937 | } |
17456804 BS |
3938 | } |
3939 | ||
2dd6e458 TM |
3940 | static __be32 |
3941 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, | |
3942 | stateid_t *stateid, unsigned char typemask, | |
3943 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 3944 | { |
0eb6f20a | 3945 | __be32 status; |
38c2f4b1 BF |
3946 | |
3947 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3948 | return nfserr_bad_stateid; | |
4b24ca7d | 3949 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 3950 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 3951 | if (cstate->session) |
a8a7c677 | 3952 | return nfserr_bad_stateid; |
38c2f4b1 | 3953 | return nfserr_stale_stateid; |
a8a7c677 | 3954 | } |
0eb6f20a BF |
3955 | if (status) |
3956 | return status; | |
4b24ca7d | 3957 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
3958 | if (!*s) |
3959 | return nfserr_bad_stateid; | |
3960 | return nfs_ok; | |
38c2f4b1 BF |
3961 | } |
3962 | ||
1da177e4 LT |
3963 | /* |
3964 | * Checks for stateid operations | |
3965 | */ | |
b37ad28b | 3966 | __be32 |
5ccb0066 | 3967 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3968 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3969 | { |
69064a27 | 3970 | struct nfs4_stid *s; |
dcef0413 | 3971 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3972 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3973 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3974 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3975 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 3976 | struct file *file = NULL; |
b37ad28b | 3977 | __be32 status; |
1da177e4 | 3978 | |
1da177e4 LT |
3979 | if (filpp) |
3980 | *filpp = NULL; | |
3981 | ||
5ccb0066 | 3982 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3983 | return nfserr_grace; |
3984 | ||
3985 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3986 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3987 | |
14bcab1a TM |
3988 | nfs4_lock_state(); |
3989 | ||
2dd6e458 | 3990 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 3991 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 3992 | &s, nn); |
38c2f4b1 | 3993 | if (status) |
14bcab1a | 3994 | goto out; |
69064a27 BF |
3995 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3996 | if (status) | |
3997 | goto out; | |
f7a4d872 BF |
3998 | switch (s->sc_type) { |
3999 | case NFS4_DELEG_STID: | |
69064a27 | 4000 | dp = delegstateid(s); |
dc9bf700 BF |
4001 | status = nfs4_check_delegmode(dp, flags); |
4002 | if (status) | |
4003 | goto out; | |
43b0178e | 4004 | if (filpp) { |
14bcab1a TM |
4005 | file = dp->dl_file->fi_deleg_file; |
4006 | if (!file) { | |
063b0fb9 BF |
4007 | WARN_ON_ONCE(1); |
4008 | status = nfserr_serverfault; | |
4009 | goto out; | |
4010 | } | |
de18643d | 4011 | get_file(file); |
43b0178e | 4012 | } |
f7a4d872 BF |
4013 | break; |
4014 | case NFS4_OPEN_STID: | |
4015 | case NFS4_LOCK_STID: | |
69064a27 | 4016 | stp = openlockstateid(s); |
f7a4d872 BF |
4017 | status = nfs4_check_fh(current_fh, stp); |
4018 | if (status) | |
1da177e4 | 4019 | goto out; |
fe0750e5 | 4020 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 4021 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 4022 | goto out; |
a4455be0 BF |
4023 | status = nfs4_check_openmode(stp, flags); |
4024 | if (status) | |
1da177e4 | 4025 | goto out; |
f9d7562f BF |
4026 | if (filpp) { |
4027 | if (flags & RD_STATE) | |
14bcab1a | 4028 | file = find_readable_file(stp->st_file); |
f9d7562f | 4029 | else |
14bcab1a | 4030 | file = find_writeable_file(stp->st_file); |
f9d7562f | 4031 | } |
f7a4d872 BF |
4032 | break; |
4033 | default: | |
14bcab1a TM |
4034 | status = nfserr_bad_stateid; |
4035 | goto out; | |
1da177e4 LT |
4036 | } |
4037 | status = nfs_ok; | |
14bcab1a | 4038 | if (file) |
de18643d | 4039 | *filpp = file; |
1da177e4 | 4040 | out: |
14bcab1a | 4041 | nfs4_unlock_state(); |
1da177e4 LT |
4042 | return status; |
4043 | } | |
4044 | ||
e1ca12df | 4045 | static __be32 |
dcef0413 | 4046 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 4047 | { |
a1b8ff4c BF |
4048 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
4049 | ||
4050 | if (check_for_locks(stp->st_file, lo)) | |
e1ca12df | 4051 | return nfserr_locks_held; |
c53530da | 4052 | release_lockowner_if_empty(lo); |
e1ca12df BS |
4053 | return nfs_ok; |
4054 | } | |
4055 | ||
17456804 BS |
4056 | /* |
4057 | * Test if the stateid is valid | |
4058 | */ | |
4059 | __be32 | |
4060 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4061 | struct nfsd4_test_stateid *test_stateid) | |
4062 | { | |
03cfb420 BS |
4063 | struct nfsd4_test_stateid_id *stateid; |
4064 | struct nfs4_client *cl = cstate->session->se_client; | |
4065 | ||
4066 | nfs4_lock_state(); | |
4067 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
4068 | stateid->ts_id_status = |
4069 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
4070 | nfs4_unlock_state(); |
4071 | ||
17456804 BS |
4072 | return nfs_ok; |
4073 | } | |
4074 | ||
e1ca12df BS |
4075 | __be32 |
4076 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
4077 | struct nfsd4_free_stateid *free_stateid) | |
4078 | { | |
4079 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 4080 | struct nfs4_stid *s; |
3bd64a5b | 4081 | struct nfs4_delegation *dp; |
38c2f4b1 | 4082 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 4083 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
4084 | |
4085 | nfs4_lock_state(); | |
38c2f4b1 | 4086 | s = find_stateid(cl, stateid); |
2da1cec7 | 4087 | if (!s) |
81b82965 | 4088 | goto out; |
2da1cec7 BF |
4089 | switch (s->sc_type) { |
4090 | case NFS4_DELEG_STID: | |
e1ca12df BS |
4091 | ret = nfserr_locks_held; |
4092 | goto out; | |
2da1cec7 BF |
4093 | case NFS4_OPEN_STID: |
4094 | case NFS4_LOCK_STID: | |
4095 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
4096 | if (ret) | |
4097 | goto out; | |
4098 | if (s->sc_type == NFS4_LOCK_STID) | |
4099 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
4100 | else | |
4101 | ret = nfserr_locks_held; | |
f7a4d872 | 4102 | break; |
3bd64a5b BF |
4103 | case NFS4_REVOKED_DELEG_STID: |
4104 | dp = delegstateid(s); | |
4105 | destroy_revoked_delegation(dp); | |
4106 | ret = nfs_ok; | |
4107 | break; | |
f7a4d872 BF |
4108 | default: |
4109 | ret = nfserr_bad_stateid; | |
e1ca12df | 4110 | } |
e1ca12df BS |
4111 | out: |
4112 | nfs4_unlock_state(); | |
4113 | return ret; | |
4114 | } | |
4115 | ||
4c4cd222 N |
4116 | static inline int |
4117 | setlkflg (int type) | |
4118 | { | |
4119 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
4120 | RD_STATE : WR_STATE; | |
4121 | } | |
1da177e4 | 4122 | |
dcef0413 | 4123 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
4124 | { |
4125 | struct svc_fh *current_fh = &cstate->current_fh; | |
4126 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
4127 | __be32 status; | |
4128 | ||
c0a5d93e BF |
4129 | status = nfsd4_check_seqid(cstate, sop, seqid); |
4130 | if (status) | |
4131 | return status; | |
3bd64a5b BF |
4132 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
4133 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
4134 | /* |
4135 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
4136 | * nfserr_replay_me from the previous step, and |
4137 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
4138 | */ |
4139 | return nfserr_bad_stateid; | |
4140 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
4141 | if (status) | |
4142 | return status; | |
4143 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
4144 | } |
4145 | ||
1da177e4 LT |
4146 | /* |
4147 | * Checks for sequence id mutating operations. | |
4148 | */ | |
b37ad28b | 4149 | static __be32 |
dd453dfd | 4150 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 4151 | stateid_t *stateid, char typemask, |
3320fef1 SK |
4152 | struct nfs4_ol_stateid **stpp, |
4153 | struct nfsd_net *nn) | |
1da177e4 | 4154 | { |
0836f587 | 4155 | __be32 status; |
38c2f4b1 | 4156 | struct nfs4_stid *s; |
e17f99b7 | 4157 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 4158 | |
8c10cbdb BH |
4159 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
4160 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 4161 | |
1da177e4 | 4162 | *stpp = NULL; |
2dd6e458 | 4163 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
4164 | if (status) |
4165 | return status; | |
e17f99b7 | 4166 | stp = openlockstateid(s); |
3d74e6a5 | 4167 | if (!nfsd4_has_session(cstate)) |
e17f99b7 | 4168 | cstate->replay_owner = stp->st_stateowner; |
1da177e4 | 4169 | |
e17f99b7 TM |
4170 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
4171 | if (!status) | |
4172 | *stpp = stp; | |
4173 | return status; | |
c0a5d93e | 4174 | } |
39325bd0 | 4175 | |
3320fef1 SK |
4176 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
4177 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
4178 | { |
4179 | __be32 status; | |
4180 | struct nfs4_openowner *oo; | |
1da177e4 | 4181 | |
c0a5d93e | 4182 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 4183 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
4184 | if (status) |
4185 | return status; | |
c0a5d93e | 4186 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 4187 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 4188 | return nfserr_bad_stateid; |
3a4f98bb | 4189 | return nfs_ok; |
1da177e4 LT |
4190 | } |
4191 | ||
b37ad28b | 4192 | __be32 |
ca364317 | 4193 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4194 | struct nfsd4_open_confirm *oc) |
1da177e4 | 4195 | { |
b37ad28b | 4196 | __be32 status; |
fe0750e5 | 4197 | struct nfs4_openowner *oo; |
dcef0413 | 4198 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4199 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4200 | |
a6a9f18f AV |
4201 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
4202 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4203 | |
ca364317 | 4204 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
4205 | if (status) |
4206 | return status; | |
1da177e4 LT |
4207 | |
4208 | nfs4_lock_state(); | |
4209 | ||
9072d5c6 | 4210 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 4211 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 4212 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 4213 | if (status) |
68b66e82 | 4214 | goto out; |
fe0750e5 | 4215 | oo = openowner(stp->st_stateowner); |
68b66e82 | 4216 | status = nfserr_bad_stateid; |
dad1c067 | 4217 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 4218 | goto out; |
dad1c067 | 4219 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
4220 | update_stateid(&stp->st_stid.sc_stateid); |
4221 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 4222 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 4223 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 4224 | |
2a4317c5 | 4225 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 4226 | status = nfs_ok; |
1da177e4 | 4227 | out: |
9411b1d4 | 4228 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4229 | if (!cstate->replay_owner) |
4230 | nfs4_unlock_state(); | |
1da177e4 LT |
4231 | return status; |
4232 | } | |
4233 | ||
6409a5a6 | 4234 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4235 | { |
82c5ff1b | 4236 | if (!test_access(access, stp)) |
6409a5a6 | 4237 | return; |
12659651 | 4238 | nfs4_file_put_access(stp->st_file, access); |
82c5ff1b | 4239 | clear_access(access, stp); |
6409a5a6 | 4240 | } |
f197c271 | 4241 | |
6409a5a6 BF |
4242 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4243 | { | |
4244 | switch (to_access) { | |
4245 | case NFS4_SHARE_ACCESS_READ: | |
4246 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4247 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4248 | break; | |
4249 | case NFS4_SHARE_ACCESS_WRITE: | |
4250 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4251 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4252 | break; | |
4253 | case NFS4_SHARE_ACCESS_BOTH: | |
4254 | break; | |
4255 | default: | |
063b0fb9 | 4256 | WARN_ON_ONCE(1); |
1da177e4 LT |
4257 | } |
4258 | } | |
4259 | ||
4260 | static void | |
ce0fc43c | 4261 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
4262 | { |
4263 | int i; | |
4264 | for (i = 0; i < 4; i++) { | |
4265 | if ((i & deny) != i) | |
ce0fc43c | 4266 | clear_deny(i, stp); |
1da177e4 LT |
4267 | } |
4268 | } | |
4269 | ||
b37ad28b | 4270 | __be32 |
ca364317 BF |
4271 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4272 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4273 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4274 | { |
b37ad28b | 4275 | __be32 status; |
dcef0413 | 4276 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4277 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4278 | |
a6a9f18f AV |
4279 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4280 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4281 | |
c30e92df | 4282 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4283 | if (od->od_deleg_want) |
4284 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4285 | od->od_deleg_want); | |
1da177e4 LT |
4286 | |
4287 | nfs4_lock_state(); | |
c0a5d93e | 4288 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4289 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4290 | if (status) |
1da177e4 | 4291 | goto out; |
1da177e4 | 4292 | status = nfserr_inval; |
82c5ff1b JL |
4293 | if (!test_access(od->od_share_access, stp)) { |
4294 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
4295 | stp->st_access_bmap, od->od_share_access); |
4296 | goto out; | |
4297 | } | |
ce0fc43c | 4298 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
4299 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
4300 | stp->st_deny_bmap, od->od_share_deny); | |
4301 | goto out; | |
4302 | } | |
6409a5a6 | 4303 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4304 | |
ce0fc43c | 4305 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4306 | |
dcef0413 BF |
4307 | update_stateid(&stp->st_stid.sc_stateid); |
4308 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4309 | status = nfs_ok; |
4310 | out: | |
9411b1d4 | 4311 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4312 | if (!cstate->replay_owner) |
4313 | nfs4_unlock_state(); | |
1da177e4 LT |
4314 | return status; |
4315 | } | |
4316 | ||
f7a4d872 BF |
4317 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4318 | { | |
acf9295b TM |
4319 | struct nfs4_client *clp = s->st_stid.sc_client; |
4320 | struct nfs4_openowner *oo = openowner(s->st_stateowner); | |
4321 | ||
f7a4d872 | 4322 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
acf9295b TM |
4323 | unhash_open_stateid(s); |
4324 | ||
4325 | if (clp->cl_minorversion) { | |
4326 | free_generic_stateid(s); | |
4327 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4328 | release_openowner(oo); | |
4329 | } else { | |
4330 | oo->oo_last_closed_stid = s; | |
4331 | /* | |
4332 | * In the 4.0 case we need to keep the owners around a | |
4333 | * little while to handle CLOSE replay. | |
4334 | */ | |
4335 | if (list_empty(&oo->oo_owner.so_stateids)) | |
4336 | move_to_close_lru(oo, clp->net); | |
4337 | } | |
38c387b5 BF |
4338 | } |
4339 | ||
1da177e4 LT |
4340 | /* |
4341 | * nfs4_unlock_state() called after encode | |
4342 | */ | |
b37ad28b | 4343 | __be32 |
ca364317 | 4344 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4345 | struct nfsd4_close *close) |
1da177e4 | 4346 | { |
b37ad28b | 4347 | __be32 status; |
dcef0413 | 4348 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4349 | struct net *net = SVC_NET(rqstp); |
4350 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4351 | |
a6a9f18f AV |
4352 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4353 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4354 | |
4355 | nfs4_lock_state(); | |
f7a4d872 BF |
4356 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4357 | &close->cl_stateid, | |
4358 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4359 | &stp, nn); |
9411b1d4 | 4360 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4361 | if (status) |
1da177e4 | 4362 | goto out; |
dcef0413 BF |
4363 | update_stateid(&stp->st_stid.sc_stateid); |
4364 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4365 | |
f7a4d872 | 4366 | nfsd4_close_open_stateid(stp); |
1da177e4 | 4367 | out: |
5ec094c1 BF |
4368 | if (!cstate->replay_owner) |
4369 | nfs4_unlock_state(); | |
1da177e4 LT |
4370 | return status; |
4371 | } | |
4372 | ||
b37ad28b | 4373 | __be32 |
ca364317 BF |
4374 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4375 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4376 | { |
203a8c8e BF |
4377 | struct nfs4_delegation *dp; |
4378 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4379 | struct nfs4_stid *s; |
b37ad28b | 4380 | __be32 status; |
3320fef1 | 4381 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4382 | |
ca364317 | 4383 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4384 | return status; |
1da177e4 LT |
4385 | |
4386 | nfs4_lock_state(); | |
2dd6e458 | 4387 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 4388 | if (status) |
203a8c8e | 4389 | goto out; |
38c2f4b1 | 4390 | dp = delegstateid(s); |
d5477a8d | 4391 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4392 | if (status) |
4393 | goto out; | |
203a8c8e | 4394 | |
3bd64a5b | 4395 | destroy_delegation(dp); |
1da177e4 | 4396 | out: |
203a8c8e BF |
4397 | nfs4_unlock_state(); |
4398 | ||
1da177e4 LT |
4399 | return status; |
4400 | } | |
4401 | ||
4402 | ||
1da177e4 | 4403 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4404 | |
87df4de8 BH |
4405 | static inline u64 |
4406 | end_offset(u64 start, u64 len) | |
4407 | { | |
4408 | u64 end; | |
4409 | ||
4410 | end = start + len; | |
4411 | return end >= start ? end: NFS4_MAX_UINT64; | |
4412 | } | |
4413 | ||
4414 | /* last octet in a range */ | |
4415 | static inline u64 | |
4416 | last_byte_offset(u64 start, u64 len) | |
4417 | { | |
4418 | u64 end; | |
4419 | ||
063b0fb9 | 4420 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4421 | end = start + len; |
4422 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4423 | } | |
4424 | ||
1da177e4 LT |
4425 | /* |
4426 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4427 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4428 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4429 | * locking, this prevents us from being completely protocol-compliant. The | |
4430 | * real solution to this problem is to start using unsigned file offsets in | |
4431 | * the VFS, but this is a very deep change! | |
4432 | */ | |
4433 | static inline void | |
4434 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4435 | { | |
4436 | if (lock->fl_start < 0) | |
4437 | lock->fl_start = OFFSET_MAX; | |
4438 | if (lock->fl_end < 0) | |
4439 | lock->fl_end = OFFSET_MAX; | |
4440 | } | |
4441 | ||
d5b9026a N |
4442 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4443 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4444 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4445 | }; |
1da177e4 LT |
4446 | |
4447 | static inline void | |
4448 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4449 | { | |
fe0750e5 | 4450 | struct nfs4_lockowner *lo; |
1da177e4 | 4451 | |
d5b9026a | 4452 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4453 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4454 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4455 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4456 | if (!deny->ld_owner.data) |
4457 | /* We just don't care that much */ | |
4458 | goto nevermind; | |
fe0750e5 BF |
4459 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4460 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4461 | } else { |
7c13f344 BF |
4462 | nevermind: |
4463 | deny->ld_owner.len = 0; | |
4464 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4465 | deny->ld_clientid.cl_boot = 0; |
4466 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4467 | } |
4468 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4469 | deny->ld_length = NFS4_MAX_UINT64; |
4470 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4471 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4472 | deny->ld_type = NFS4_READ_LT; | |
4473 | if (fl->fl_type != F_RDLCK) | |
4474 | deny->ld_type = NFS4_WRITE_LT; | |
4475 | } | |
4476 | ||
fe0750e5 | 4477 | static struct nfs4_lockowner * |
b3c32bcd TM |
4478 | find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, |
4479 | struct nfsd_net *nn) | |
1da177e4 | 4480 | { |
b3c32bcd TM |
4481 | unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); |
4482 | struct nfs4_stateowner *so; | |
1da177e4 | 4483 | |
b3c32bcd TM |
4484 | list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { |
4485 | if (so->so_is_open_owner) | |
4486 | continue; | |
4487 | if (!same_owner_str(so, owner, clid)) | |
4488 | continue; | |
4489 | return lockowner(so); | |
1da177e4 LT |
4490 | } |
4491 | return NULL; | |
4492 | } | |
4493 | ||
4494 | /* | |
4495 | * Alloc a lock owner structure. | |
4496 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4497 | * occurred. |
1da177e4 | 4498 | * |
16bfdaaf | 4499 | * strhashval = ownerstr_hashval |
1da177e4 | 4500 | */ |
fe0750e5 | 4501 | static struct nfs4_lockowner * |
dcef0413 | 4502 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4503 | struct nfs4_lockowner *lo; |
b3c32bcd | 4504 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 4505 | |
fe0750e5 BF |
4506 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4507 | if (!lo) | |
1da177e4 | 4508 | return NULL; |
fe0750e5 BF |
4509 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4510 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4511 | /* It is the openowner seqid that will be incremented in encode in the |
4512 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 | 4513 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
b3c32bcd | 4514 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
fe0750e5 | 4515 | return lo; |
1da177e4 LT |
4516 | } |
4517 | ||
dcef0413 BF |
4518 | static struct nfs4_ol_stateid * |
4519 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4520 | { |
dcef0413 | 4521 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4522 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4523 | |
996e0938 | 4524 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4525 | if (stp == NULL) |
6136d2b4 | 4526 | return NULL; |
3abdb607 | 4527 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
fe0750e5 BF |
4528 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4529 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4530 | get_nfs4_file(fp); |
1da177e4 | 4531 | stp->st_file = fp; |
0997b173 | 4532 | stp->st_access_bmap = 0; |
1da177e4 | 4533 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4534 | stp->st_openstp = open_stp; |
3c87b9b7 | 4535 | list_add(&stp->st_locks, &open_stp->st_locks); |
1d31a253 TM |
4536 | spin_lock(&fp->fi_lock); |
4537 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
4538 | spin_unlock(&fp->fi_lock); | |
1da177e4 LT |
4539 | return stp; |
4540 | } | |
4541 | ||
c53530da JL |
4542 | static struct nfs4_ol_stateid * |
4543 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) | |
4544 | { | |
4545 | struct nfs4_ol_stateid *lst; | |
4546 | ||
4547 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { | |
4548 | if (lst->st_file == fp) | |
4549 | return lst; | |
4550 | } | |
4551 | return NULL; | |
4552 | } | |
4553 | ||
4554 | ||
fd39ca9a | 4555 | static int |
1da177e4 LT |
4556 | check_lock_length(u64 offset, u64 length) |
4557 | { | |
87df4de8 | 4558 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4559 | LOFF_OVERFLOW(offset, length))); |
4560 | } | |
4561 | ||
dcef0413 | 4562 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4563 | { |
4564 | struct nfs4_file *fp = lock_stp->st_file; | |
0997b173 | 4565 | |
82c5ff1b | 4566 | if (test_access(access, lock_stp)) |
0997b173 | 4567 | return; |
12659651 | 4568 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 4569 | set_access(access, lock_stp); |
0997b173 BF |
4570 | } |
4571 | ||
2355c596 | 4572 | 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 |
4573 | { |
4574 | struct nfs4_file *fi = ost->st_file; | |
4575 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4576 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4577 | struct nfs4_lockowner *lo; | |
4578 | unsigned int strhashval; | |
20e9e2bc | 4579 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4580 | |
b3c32bcd | 4581 | lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); |
c53530da JL |
4582 | if (!lo) { |
4583 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, | |
4584 | &lock->v.new.owner); | |
4585 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4586 | if (lo == NULL) | |
4587 | return nfserr_jukebox; | |
4588 | } else { | |
4589 | /* with an existing lockowner, seqids must be the same */ | |
4590 | if (!cstate->minorversion && | |
4591 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
64a284d0 | 4592 | return nfserr_bad_seqid; |
64a284d0 | 4593 | } |
c53530da JL |
4594 | |
4595 | *lst = find_lock_stateid(lo, fi); | |
64a284d0 | 4596 | if (*lst == NULL) { |
c53530da JL |
4597 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
4598 | if (*lst == NULL) { | |
4599 | release_lockowner_if_empty(lo); | |
4600 | return nfserr_jukebox; | |
4601 | } | |
4602 | *new = true; | |
64a284d0 | 4603 | } |
64a284d0 BF |
4604 | return nfs_ok; |
4605 | } | |
4606 | ||
1da177e4 LT |
4607 | /* |
4608 | * LOCK operation | |
4609 | */ | |
b37ad28b | 4610 | __be32 |
ca364317 | 4611 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4612 | struct nfsd4_lock *lock) |
1da177e4 | 4613 | { |
fe0750e5 BF |
4614 | struct nfs4_openowner *open_sop = NULL; |
4615 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4616 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4617 | struct file *filp = NULL; |
21179d81 JL |
4618 | struct file_lock *file_lock = NULL; |
4619 | struct file_lock *conflock = NULL; | |
b37ad28b | 4620 | __be32 status = 0; |
64a284d0 | 4621 | bool new_state = false; |
b34f27aa | 4622 | int lkflg; |
b8dd7b9a | 4623 | int err; |
3320fef1 SK |
4624 | struct net *net = SVC_NET(rqstp); |
4625 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4626 | |
4627 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4628 | (long long) lock->lk_offset, | |
4629 | (long long) lock->lk_length); | |
4630 | ||
1da177e4 LT |
4631 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4632 | return nfserr_inval; | |
4633 | ||
ca364317 | 4634 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4635 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4636 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4637 | return status; | |
4638 | } | |
4639 | ||
1da177e4 LT |
4640 | nfs4_lock_state(); |
4641 | ||
4642 | if (lock->lk_is_new) { | |
dcef0413 | 4643 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4644 | |
4645 | if (nfsd4_has_session(cstate)) | |
4646 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4647 | memcpy(&lock->v.new.clientid, | |
4648 | &cstate->session->se_client->cl_clientid, | |
4649 | sizeof(clientid_t)); | |
4650 | ||
1da177e4 | 4651 | status = nfserr_stale_clientid; |
2c142baa | 4652 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4653 | goto out; |
1da177e4 | 4654 | |
1da177e4 | 4655 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4656 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4657 | lock->lk_new_open_seqid, |
4658 | &lock->lk_new_open_stateid, | |
3320fef1 | 4659 | &open_stp, nn); |
37515177 | 4660 | if (status) |
1da177e4 | 4661 | goto out; |
fe0750e5 | 4662 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4663 | status = nfserr_bad_stateid; |
684e5638 | 4664 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4665 | &lock->v.new.clientid)) |
4666 | goto out; | |
64a284d0 BF |
4667 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4668 | &lock_stp, &new_state); | |
e1aaa891 | 4669 | } else |
dd453dfd | 4670 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4671 | lock->lk_old_lock_seqid, |
4672 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4673 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4674 | if (status) |
4675 | goto out; | |
64a284d0 | 4676 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4677 | |
b34f27aa BF |
4678 | lkflg = setlkflg(lock->lk_type); |
4679 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4680 | if (status) | |
4681 | goto out; | |
4682 | ||
0dd395dc | 4683 | status = nfserr_grace; |
3320fef1 | 4684 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4685 | goto out; |
4686 | status = nfserr_no_grace; | |
3320fef1 | 4687 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4688 | goto out; |
4689 | ||
21179d81 JL |
4690 | file_lock = locks_alloc_lock(); |
4691 | if (!file_lock) { | |
4692 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4693 | status = nfserr_jukebox; | |
4694 | goto out; | |
4695 | } | |
4696 | ||
4697 | locks_init_lock(file_lock); | |
1da177e4 LT |
4698 | switch (lock->lk_type) { |
4699 | case NFS4_READ_LT: | |
4700 | case NFS4_READW_LT: | |
0997b173 BF |
4701 | filp = find_readable_file(lock_stp->st_file); |
4702 | if (filp) | |
4703 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4704 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4705 | break; |
1da177e4 LT |
4706 | case NFS4_WRITE_LT: |
4707 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4708 | filp = find_writeable_file(lock_stp->st_file); |
4709 | if (filp) | |
4710 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4711 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4712 | break; |
1da177e4 LT |
4713 | default: |
4714 | status = nfserr_inval; | |
4715 | goto out; | |
4716 | } | |
f9d7562f BF |
4717 | if (!filp) { |
4718 | status = nfserr_openmode; | |
4719 | goto out; | |
4720 | } | |
21179d81 JL |
4721 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4722 | file_lock->fl_pid = current->tgid; | |
4723 | file_lock->fl_file = filp; | |
4724 | file_lock->fl_flags = FL_POSIX; | |
4725 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4726 | file_lock->fl_start = lock->lk_offset; | |
4727 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4728 | nfs4_transform_lock_offset(file_lock); | |
4729 | ||
4730 | conflock = locks_alloc_lock(); | |
4731 | if (!conflock) { | |
4732 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4733 | status = nfserr_jukebox; | |
4734 | goto out; | |
4735 | } | |
1da177e4 | 4736 | |
21179d81 | 4737 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4738 | switch (-err) { |
1da177e4 | 4739 | case 0: /* success! */ |
dcef0413 BF |
4740 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4741 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4742 | sizeof(stateid_t)); |
b8dd7b9a | 4743 | status = 0; |
eb76b3fd AA |
4744 | break; |
4745 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4746 | status = nfserr_denied; | |
4747 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4748 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4749 | break; |
1da177e4 LT |
4750 | case (EDEADLK): |
4751 | status = nfserr_deadlock; | |
eb76b3fd | 4752 | break; |
3e772463 | 4753 | default: |
fd85b817 | 4754 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4755 | status = nfserrno(err); |
eb76b3fd | 4756 | break; |
1da177e4 | 4757 | } |
1da177e4 | 4758 | out: |
de18643d TM |
4759 | if (filp) |
4760 | fput(filp); | |
64a284d0 | 4761 | if (status && new_state) |
c53530da | 4762 | release_lock_stateid(lock_stp); |
9411b1d4 | 4763 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4764 | if (!cstate->replay_owner) |
4765 | nfs4_unlock_state(); | |
21179d81 JL |
4766 | if (file_lock) |
4767 | locks_free_lock(file_lock); | |
4768 | if (conflock) | |
4769 | locks_free_lock(conflock); | |
1da177e4 LT |
4770 | return status; |
4771 | } | |
4772 | ||
55ef1274 BF |
4773 | /* |
4774 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4775 | * so we do a temporary open here just to get an open file to pass to | |
4776 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4777 | * inode operation.) | |
4778 | */ | |
04da6e9d | 4779 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4780 | { |
4781 | struct file *file; | |
04da6e9d AV |
4782 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4783 | if (!err) { | |
4784 | err = nfserrno(vfs_test_lock(file, lock)); | |
4785 | nfsd_close(file); | |
4786 | } | |
55ef1274 BF |
4787 | return err; |
4788 | } | |
4789 | ||
1da177e4 LT |
4790 | /* |
4791 | * LOCKT operation | |
4792 | */ | |
b37ad28b | 4793 | __be32 |
ca364317 BF |
4794 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4795 | struct nfsd4_lockt *lockt) | |
1da177e4 | 4796 | { |
21179d81 | 4797 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4798 | struct nfs4_lockowner *lo; |
b37ad28b | 4799 | __be32 status; |
7f2210fa | 4800 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4801 | |
5ccb0066 | 4802 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4803 | return nfserr_grace; |
4804 | ||
4805 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4806 | return nfserr_inval; | |
4807 | ||
1da177e4 LT |
4808 | nfs4_lock_state(); |
4809 | ||
9b2ef62b | 4810 | if (!nfsd4_has_session(cstate)) { |
4b24ca7d | 4811 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
4812 | if (status) |
4813 | goto out; | |
4814 | } | |
1da177e4 | 4815 | |
75c096f7 | 4816 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4817 | goto out; |
1da177e4 | 4818 | |
21179d81 JL |
4819 | file_lock = locks_alloc_lock(); |
4820 | if (!file_lock) { | |
4821 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4822 | status = nfserr_jukebox; | |
4823 | goto out; | |
4824 | } | |
4825 | locks_init_lock(file_lock); | |
1da177e4 LT |
4826 | switch (lockt->lt_type) { |
4827 | case NFS4_READ_LT: | |
4828 | case NFS4_READW_LT: | |
21179d81 | 4829 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4830 | break; |
4831 | case NFS4_WRITE_LT: | |
4832 | case NFS4_WRITEW_LT: | |
21179d81 | 4833 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4834 | break; |
4835 | default: | |
2fdada03 | 4836 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4837 | status = nfserr_inval; |
4838 | goto out; | |
4839 | } | |
4840 | ||
b3c32bcd | 4841 | lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4842 | if (lo) |
21179d81 JL |
4843 | file_lock->fl_owner = (fl_owner_t)lo; |
4844 | file_lock->fl_pid = current->tgid; | |
4845 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4846 | |
21179d81 JL |
4847 | file_lock->fl_start = lockt->lt_offset; |
4848 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4849 | |
21179d81 | 4850 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4851 | |
21179d81 | 4852 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4853 | if (status) |
fd85b817 | 4854 | goto out; |
04da6e9d | 4855 | |
21179d81 | 4856 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4857 | status = nfserr_denied; |
21179d81 | 4858 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4859 | } |
4860 | out: | |
4861 | nfs4_unlock_state(); | |
21179d81 JL |
4862 | if (file_lock) |
4863 | locks_free_lock(file_lock); | |
1da177e4 LT |
4864 | return status; |
4865 | } | |
4866 | ||
b37ad28b | 4867 | __be32 |
ca364317 | 4868 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4869 | struct nfsd4_locku *locku) |
1da177e4 | 4870 | { |
dcef0413 | 4871 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4872 | struct file *filp = NULL; |
21179d81 | 4873 | struct file_lock *file_lock = NULL; |
b37ad28b | 4874 | __be32 status; |
b8dd7b9a | 4875 | int err; |
3320fef1 SK |
4876 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4877 | ||
1da177e4 LT |
4878 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4879 | (long long) locku->lu_offset, | |
4880 | (long long) locku->lu_length); | |
4881 | ||
4882 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4883 | return nfserr_inval; | |
4884 | ||
4885 | nfs4_lock_state(); | |
4886 | ||
9072d5c6 | 4887 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4888 | &locku->lu_stateid, NFS4_LOCK_STID, |
4889 | &stp, nn); | |
9072d5c6 | 4890 | if (status) |
1da177e4 | 4891 | goto out; |
f9d7562f BF |
4892 | filp = find_any_file(stp->st_file); |
4893 | if (!filp) { | |
4894 | status = nfserr_lock_range; | |
4895 | goto out; | |
4896 | } | |
21179d81 JL |
4897 | file_lock = locks_alloc_lock(); |
4898 | if (!file_lock) { | |
4899 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4900 | status = nfserr_jukebox; | |
de18643d | 4901 | goto fput; |
21179d81 JL |
4902 | } |
4903 | locks_init_lock(file_lock); | |
4904 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4905 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4906 | file_lock->fl_pid = current->tgid; |
4907 | file_lock->fl_file = filp; | |
4908 | file_lock->fl_flags = FL_POSIX; | |
4909 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4910 | file_lock->fl_start = locku->lu_offset; | |
4911 | ||
4912 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4913 | locku->lu_length); | |
4914 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4915 | |
21179d81 | 4916 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4917 | if (err) { |
fd85b817 | 4918 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4919 | goto out_nfserr; |
4920 | } | |
dcef0413 BF |
4921 | update_stateid(&stp->st_stid.sc_stateid); |
4922 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
de18643d TM |
4923 | fput: |
4924 | fput(filp); | |
1da177e4 | 4925 | out: |
9411b1d4 | 4926 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4927 | if (!cstate->replay_owner) |
4928 | nfs4_unlock_state(); | |
21179d81 JL |
4929 | if (file_lock) |
4930 | locks_free_lock(file_lock); | |
1da177e4 LT |
4931 | return status; |
4932 | ||
4933 | out_nfserr: | |
b8dd7b9a | 4934 | status = nfserrno(err); |
de18643d | 4935 | goto fput; |
1da177e4 LT |
4936 | } |
4937 | ||
4938 | /* | |
4939 | * returns | |
4940 | * 1: locks held by lockowner | |
4941 | * 0: no locks held by lockowner | |
4942 | */ | |
4943 | static int | |
fe0750e5 | 4944 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4945 | { |
4946 | struct file_lock **flpp; | |
f9d7562f | 4947 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4948 | int status = 0; |
4949 | ||
1c8c601a | 4950 | spin_lock(&inode->i_lock); |
1da177e4 | 4951 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4952 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4953 | status = 1; |
4954 | goto out; | |
796dadfd | 4955 | } |
1da177e4 LT |
4956 | } |
4957 | out: | |
1c8c601a | 4958 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4959 | return status; |
4960 | } | |
4961 | ||
b37ad28b | 4962 | __be32 |
b591480b BF |
4963 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4964 | struct nfsd4_compound_state *cstate, | |
4965 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4966 | { |
4967 | clientid_t *clid = &rlockowner->rl_clientid; | |
fd44907c | 4968 | struct nfs4_stateowner *sop = NULL, *tmp; |
fe0750e5 | 4969 | struct nfs4_lockowner *lo; |
dcef0413 | 4970 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4971 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
16bfdaaf | 4972 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4973 | __be32 status; |
7f2210fa | 4974 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4975 | |
4976 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4977 | clid->cl_boot, clid->cl_id); | |
4978 | ||
1da177e4 LT |
4979 | nfs4_lock_state(); |
4980 | ||
4b24ca7d | 4981 | status = lookup_clientid(clid, cstate, nn); |
9b2ef62b BF |
4982 | if (status) |
4983 | goto out; | |
4984 | ||
3e9e3dbe | 4985 | status = nfserr_locks_held; |
06f1f864 | 4986 | |
fd44907c JL |
4987 | /* Find the matching lock stateowner */ |
4988 | list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { | |
4989 | if (tmp->so_is_open_owner) | |
06f1f864 | 4990 | continue; |
fd44907c JL |
4991 | if (same_owner_str(tmp, owner, clid)) { |
4992 | sop = tmp; | |
4993 | break; | |
1da177e4 | 4994 | } |
3e9e3dbe | 4995 | } |
fd44907c JL |
4996 | |
4997 | /* No matching owner found, maybe a replay? Just declare victory... */ | |
4998 | if (!sop) { | |
4999 | status = nfs_ok; | |
5000 | goto out; | |
5001 | } | |
5002 | ||
5003 | lo = lockowner(sop); | |
5004 | /* see if there are still any locks associated with it */ | |
5005 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
5006 | if (check_for_locks(stp->st_file, lo)) | |
5007 | goto out; | |
1da177e4 | 5008 | } |
fd44907c JL |
5009 | |
5010 | status = nfs_ok; | |
5011 | release_lockowner(lo); | |
1da177e4 LT |
5012 | out: |
5013 | nfs4_unlock_state(); | |
5014 | return status; | |
5015 | } | |
5016 | ||
5017 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 5018 | alloc_reclaim(void) |
1da177e4 | 5019 | { |
a55370a3 | 5020 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
5021 | } |
5022 | ||
0ce0c2b5 | 5023 | bool |
52e19c09 | 5024 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 5025 | { |
0ce0c2b5 | 5026 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 5027 | |
52e19c09 | 5028 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 5029 | return (crp && crp->cr_clp); |
c7b9a459 N |
5030 | } |
5031 | ||
1da177e4 LT |
5032 | /* |
5033 | * failure => all reset bets are off, nfserr_no_grace... | |
5034 | */ | |
772a9bbb | 5035 | struct nfs4_client_reclaim * |
52e19c09 | 5036 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
5037 | { |
5038 | unsigned int strhashval; | |
772a9bbb | 5039 | struct nfs4_client_reclaim *crp; |
1da177e4 | 5040 | |
a55370a3 N |
5041 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
5042 | crp = alloc_reclaim(); | |
772a9bbb JL |
5043 | if (crp) { |
5044 | strhashval = clientstr_hashval(name); | |
5045 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 5046 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 5047 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 5048 | crp->cr_clp = NULL; |
52e19c09 | 5049 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
5050 | } |
5051 | return crp; | |
1da177e4 LT |
5052 | } |
5053 | ||
ce30e539 | 5054 | void |
52e19c09 | 5055 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
5056 | { |
5057 | list_del(&crp->cr_strhash); | |
5058 | kfree(crp); | |
52e19c09 | 5059 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
5060 | } |
5061 | ||
2a4317c5 | 5062 | void |
52e19c09 | 5063 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
5064 | { |
5065 | struct nfs4_client_reclaim *crp = NULL; | |
5066 | int i; | |
5067 | ||
1da177e4 | 5068 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
5069 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
5070 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 5071 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 5072 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
5073 | } |
5074 | } | |
063b0fb9 | 5075 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
5076 | } |
5077 | ||
5078 | /* | |
5079 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 5080 | struct nfs4_client_reclaim * |
52e19c09 | 5081 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
5082 | { |
5083 | unsigned int strhashval; | |
1da177e4 LT |
5084 | struct nfs4_client_reclaim *crp = NULL; |
5085 | ||
278c931c | 5086 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 5087 | |
278c931c | 5088 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 5089 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 5090 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
5091 | return crp; |
5092 | } | |
5093 | } | |
5094 | return NULL; | |
5095 | } | |
5096 | ||
5097 | /* | |
5098 | * Called from OPEN. Look for clientid in reclaim list. | |
5099 | */ | |
b37ad28b | 5100 | __be32 |
0fe492db TM |
5101 | nfs4_check_open_reclaim(clientid_t *clid, |
5102 | struct nfsd4_compound_state *cstate, | |
5103 | struct nfsd_net *nn) | |
1da177e4 | 5104 | { |
0fe492db | 5105 | __be32 status; |
a52d726b JL |
5106 | |
5107 | /* find clientid in conf_id_hashtbl */ | |
0fe492db TM |
5108 | status = lookup_clientid(clid, cstate, nn); |
5109 | if (status) | |
a52d726b JL |
5110 | return nfserr_reclaim_bad; |
5111 | ||
0fe492db TM |
5112 | if (nfsd4_client_record_check(cstate->clp)) |
5113 | return nfserr_reclaim_bad; | |
5114 | ||
5115 | return nfs_ok; | |
1da177e4 LT |
5116 | } |
5117 | ||
65178db4 BS |
5118 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
5119 | ||
44e34da6 BS |
5120 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
5121 | { | |
221a6876 BF |
5122 | if (mark_client_expired(clp)) |
5123 | return 0; | |
44e34da6 BS |
5124 | expire_client(clp); |
5125 | return 1; | |
5126 | } | |
5127 | ||
184c1847 BS |
5128 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
5129 | { | |
5130 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5131 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5132 | printk(KERN_INFO "NFS Client: %s\n", buf); |
5133 | return 1; | |
5134 | } | |
5135 | ||
5136 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
5137 | const char *type) | |
5138 | { | |
5139 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 5140 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
5141 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
5142 | } | |
5143 | ||
3c87b9b7 TM |
5144 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
5145 | void (*func)(struct nfs4_ol_stateid *)) | |
fc29171f BS |
5146 | { |
5147 | struct nfs4_openowner *oop; | |
fc29171f | 5148 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 5149 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
5150 | u64 count = 0; |
5151 | ||
5152 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
3c87b9b7 TM |
5153 | list_for_each_entry_safe(stp, st_next, |
5154 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
5155 | list_for_each_entry_safe(lst, lst_next, | |
5156 | &stp->st_locks, st_locks) { | |
fc29171f | 5157 | if (func) |
3c87b9b7 | 5158 | func(lst); |
fc29171f BS |
5159 | if (++count == max) |
5160 | return count; | |
5161 | } | |
5162 | } | |
5163 | } | |
5164 | ||
5165 | return count; | |
5166 | } | |
5167 | ||
5168 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
5169 | { | |
3c87b9b7 | 5170 | return nfsd_foreach_client_lock(clp, max, release_lock_stateid); |
fc29171f BS |
5171 | } |
5172 | ||
184c1847 BS |
5173 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
5174 | { | |
5175 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
5176 | nfsd_print_count(clp, count, "locked files"); | |
5177 | return count; | |
5178 | } | |
5179 | ||
4dbdbda8 BS |
5180 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
5181 | { | |
5182 | struct nfs4_openowner *oop, *next; | |
5183 | u64 count = 0; | |
5184 | ||
5185 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
5186 | if (func) | |
5187 | func(oop); | |
5188 | if (++count == max) | |
5189 | break; | |
5190 | } | |
5191 | ||
5192 | return count; | |
5193 | } | |
5194 | ||
5195 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
5196 | { | |
5197 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
5198 | } | |
5199 | ||
184c1847 BS |
5200 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
5201 | { | |
5202 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
5203 | nfsd_print_count(clp, count, "open files"); | |
5204 | return count; | |
5205 | } | |
5206 | ||
269de30f BS |
5207 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
5208 | struct list_head *victims) | |
5209 | { | |
5210 | struct nfs4_delegation *dp, *next; | |
5211 | u64 count = 0; | |
5212 | ||
cdc97505 | 5213 | lockdep_assert_held(&state_lock); |
269de30f | 5214 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
5215 | if (victims) { |
5216 | /* | |
5217 | * It's not safe to mess with delegations that have a | |
5218 | * non-zero dl_time. They might have already been broken | |
5219 | * and could be processed by the laundromat outside of | |
5220 | * the state_lock. Just leave them be. | |
5221 | */ | |
5222 | if (dp->dl_time != 0) | |
5223 | continue; | |
5224 | ||
5225 | /* | |
5226 | * Increment dl_time to ensure that delegation breaks | |
5227 | * don't monkey with it now that we are. | |
5228 | */ | |
5229 | ++dp->dl_time; | |
269de30f | 5230 | list_move(&dp->dl_recall_lru, victims); |
dff1399f | 5231 | } |
269de30f BS |
5232 | if (++count == max) |
5233 | break; | |
5234 | } | |
5235 | return count; | |
5236 | } | |
5237 | ||
5238 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5239 | { | |
5240 | struct nfs4_delegation *dp, *next; | |
5241 | LIST_HEAD(victims); | |
5242 | u64 count; | |
5243 | ||
cdc97505 | 5244 | spin_lock(&state_lock); |
269de30f | 5245 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5246 | spin_unlock(&state_lock); |
269de30f BS |
5247 | |
5248 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 5249 | revoke_delegation(dp); |
269de30f BS |
5250 | |
5251 | return count; | |
5252 | } | |
5253 | ||
5254 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5255 | { | |
dff1399f | 5256 | struct nfs4_delegation *dp; |
269de30f BS |
5257 | LIST_HEAD(victims); |
5258 | u64 count; | |
5259 | ||
cdc97505 | 5260 | spin_lock(&state_lock); |
269de30f | 5261 | count = nfsd_find_all_delegations(clp, max, &victims); |
dff1399f JL |
5262 | while (!list_empty(&victims)) { |
5263 | dp = list_first_entry(&victims, struct nfs4_delegation, | |
5264 | dl_recall_lru); | |
5265 | list_del_init(&dp->dl_recall_lru); | |
5266 | dp->dl_time = 0; | |
269de30f | 5267 | nfsd_break_one_deleg(dp); |
dff1399f | 5268 | } |
cdc97505 | 5269 | spin_unlock(&state_lock); |
269de30f BS |
5270 | |
5271 | return count; | |
5272 | } | |
5273 | ||
184c1847 BS |
5274 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5275 | { | |
5276 | u64 count = 0; | |
5277 | ||
cdc97505 | 5278 | spin_lock(&state_lock); |
184c1847 | 5279 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5280 | spin_unlock(&state_lock); |
184c1847 BS |
5281 | |
5282 | nfsd_print_count(clp, count, "delegations"); | |
5283 | return count; | |
5284 | } | |
5285 | ||
44e34da6 | 5286 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5287 | { |
5288 | struct nfs4_client *clp, *next; | |
44e34da6 | 5289 | u64 count = 0; |
3320fef1 | 5290 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5291 | |
44e34da6 BS |
5292 | if (!nfsd_netns_ready(nn)) |
5293 | return 0; | |
5294 | ||
5ed58bb2 | 5295 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5296 | count += func(clp, max - count); |
5297 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5298 | break; |
5299 | } | |
65178db4 | 5300 | |
44e34da6 BS |
5301 | return count; |
5302 | } | |
5303 | ||
6c1e82a4 BS |
5304 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5305 | { | |
5306 | struct nfs4_client *clp; | |
5307 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5308 | ||
5309 | if (!nfsd_netns_ready(nn)) | |
5310 | return NULL; | |
5311 | ||
5312 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5313 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5314 | return clp; | |
5315 | } | |
5316 | return NULL; | |
5317 | } | |
5318 | ||
65178db4 BS |
5319 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5320 | ||
c2f1a551 MS |
5321 | /* |
5322 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5323 | * client may quite reasonably hang on to a delegation as long as it has | |
5324 | * the inode cached. This becomes an obvious problem the first time a | |
5325 | * client's inode cache approaches the size of the server's total memory. | |
5326 | * | |
5327 | * For now we avoid this problem by imposing a hard limit on the number | |
5328 | * of delegations, which varies according to the server's memory size. | |
5329 | */ | |
5330 | static void | |
5331 | set_max_delegations(void) | |
5332 | { | |
5333 | /* | |
5334 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5335 | * estimates suggest that in the worst case (where every delegation | |
5336 | * is for a different inode), a delegation could take about 1.5K, | |
5337 | * giving a worst case usage of about 6% of memory. | |
5338 | */ | |
5339 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5340 | } | |
5341 | ||
d85ed443 | 5342 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5343 | { |
5344 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5345 | int i; | |
5346 | ||
5347 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5348 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5349 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5350 | goto err; |
0a7ec377 SK |
5351 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5352 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5353 | if (!nn->unconf_id_hashtbl) | |
5354 | goto err_unconf_id; | |
9b531137 SK |
5355 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5356 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5357 | if (!nn->ownerstr_hashtbl) | |
5358 | goto err_ownerstr; | |
1872de0e SK |
5359 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5360 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5361 | if (!nn->sessionid_hashtbl) | |
5362 | goto err_sessionid; | |
8daae4dc | 5363 | |
382a62e7 | 5364 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5365 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5366 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5367 | } |
9b531137 SK |
5368 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5369 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
1872de0e SK |
5370 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5371 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5372 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5373 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5374 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5375 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5376 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5377 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5378 | |
09121281 | 5379 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5380 | get_net(net); |
09121281 | 5381 | |
8daae4dc | 5382 | return 0; |
382a62e7 | 5383 | |
1872de0e | 5384 | err_sessionid: |
20e9e2bc | 5385 | kfree(nn->ownerstr_hashtbl); |
9b531137 SK |
5386 | err_ownerstr: |
5387 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5388 | err_unconf_id: |
5389 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5390 | err: |
5391 | return -ENOMEM; | |
8daae4dc SK |
5392 | } |
5393 | ||
5394 | static void | |
4dce0ac9 | 5395 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5396 | { |
5397 | int i; | |
5398 | struct nfs4_client *clp = NULL; | |
5399 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5400 | ||
5401 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5402 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5403 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5404 | destroy_client(clp); | |
5405 | } | |
5406 | } | |
a99454aa | 5407 | |
2b905635 KM |
5408 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5409 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5410 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5411 | destroy_client(clp); | |
5412 | } | |
a99454aa SK |
5413 | } |
5414 | ||
1872de0e | 5415 | kfree(nn->sessionid_hashtbl); |
9b531137 | 5416 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5417 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5418 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5419 | put_net(net); |
8daae4dc SK |
5420 | } |
5421 | ||
f252bc68 | 5422 | int |
d85ed443 | 5423 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5424 | { |
5e1533c7 | 5425 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5426 | int ret; |
5427 | ||
d85ed443 | 5428 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5429 | if (ret) |
5430 | return ret; | |
5e1533c7 | 5431 | nfsd4_client_tracking_init(net); |
2c142baa | 5432 | nn->boot_time = get_seconds(); |
5ccb0066 | 5433 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5434 | nn->grace_ended = false; |
d85ed443 | 5435 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5436 | nn->nfsd4_grace, net); |
5437 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5438 | return 0; |
5439 | } | |
5440 | ||
5441 | /* initialization to perform when the nfsd service is started: */ | |
5442 | ||
5443 | int | |
5444 | nfs4_state_start(void) | |
5445 | { | |
5446 | int ret; | |
5447 | ||
b5a1a81e | 5448 | ret = set_callback_cred(); |
d85ed443 SK |
5449 | if (ret) |
5450 | return -ENOMEM; | |
58da282b | 5451 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5452 | if (laundry_wq == NULL) { |
5453 | ret = -ENOMEM; | |
5454 | goto out_recovery; | |
5455 | } | |
b5a1a81e BF |
5456 | ret = nfsd4_create_callback_queue(); |
5457 | if (ret) | |
5458 | goto out_free_laundry; | |
09121281 | 5459 | |
c2f1a551 | 5460 | set_max_delegations(); |
d85ed443 | 5461 | |
b5a1a81e | 5462 | return 0; |
d85ed443 | 5463 | |
b5a1a81e BF |
5464 | out_free_laundry: |
5465 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5466 | out_recovery: |
b5a1a81e | 5467 | return ret; |
1da177e4 LT |
5468 | } |
5469 | ||
f252bc68 | 5470 | void |
4dce0ac9 | 5471 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5472 | { |
1da177e4 | 5473 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5474 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5475 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5476 | |
4dce0ac9 SK |
5477 | cancel_delayed_work_sync(&nn->laundromat_work); |
5478 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5479 | |
e50a26dc | 5480 | nfs4_lock_state(); |
1da177e4 | 5481 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5482 | spin_lock(&state_lock); |
e8c69d17 | 5483 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5484 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5485 | list_move(&dp->dl_recall_lru, &reaplist); | |
5486 | } | |
cdc97505 | 5487 | spin_unlock(&state_lock); |
1da177e4 LT |
5488 | list_for_each_safe(pos, next, &reaplist) { |
5489 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5490 | destroy_delegation(dp); |
1da177e4 LT |
5491 | } |
5492 | ||
3320fef1 | 5493 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5494 | nfs4_state_destroy_net(net); |
e50a26dc | 5495 | nfs4_unlock_state(); |
1da177e4 LT |
5496 | } |
5497 | ||
5498 | void | |
5499 | nfs4_state_shutdown(void) | |
5500 | { | |
5e8d5c29 | 5501 | destroy_workqueue(laundry_wq); |
c3935e30 | 5502 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5503 | } |
8b70484c TM |
5504 | |
5505 | static void | |
5506 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5507 | { | |
37c593c5 TM |
5508 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5509 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5510 | } |
5511 | ||
5512 | static void | |
5513 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5514 | { | |
37c593c5 TM |
5515 | if (cstate->minorversion) { |
5516 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5517 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5518 | } | |
5519 | } | |
5520 | ||
5521 | void | |
5522 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5523 | { | |
5524 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5525 | } |
5526 | ||
62cd4a59 TM |
5527 | /* |
5528 | * functions to set current state id | |
5529 | */ | |
9428fe1a TM |
5530 | void |
5531 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5532 | { | |
5533 | put_stateid(cstate, &odp->od_stateid); | |
5534 | } | |
5535 | ||
8b70484c TM |
5536 | void |
5537 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5538 | { | |
5539 | put_stateid(cstate, &open->op_stateid); | |
5540 | } | |
5541 | ||
62cd4a59 TM |
5542 | void |
5543 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5544 | { | |
5545 | put_stateid(cstate, &close->cl_stateid); | |
5546 | } | |
5547 | ||
5548 | void | |
5549 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5550 | { | |
5551 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5552 | } | |
5553 | ||
5554 | /* | |
5555 | * functions to consume current state id | |
5556 | */ | |
1e97b519 | 5557 | |
9428fe1a TM |
5558 | void |
5559 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5560 | { | |
5561 | get_stateid(cstate, &odp->od_stateid); | |
5562 | } | |
5563 | ||
5564 | void | |
5565 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5566 | { | |
5567 | get_stateid(cstate, &drp->dr_stateid); | |
5568 | } | |
5569 | ||
1e97b519 TM |
5570 | void |
5571 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5572 | { | |
5573 | get_stateid(cstate, &fsp->fr_stateid); | |
5574 | } | |
5575 | ||
5576 | void | |
5577 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5578 | { | |
5579 | get_stateid(cstate, &setattr->sa_stateid); | |
5580 | } | |
5581 | ||
8b70484c TM |
5582 | void |
5583 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5584 | { | |
5585 | get_stateid(cstate, &close->cl_stateid); | |
5586 | } | |
5587 | ||
5588 | void | |
62cd4a59 | 5589 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5590 | { |
62cd4a59 | 5591 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5592 | } |
30813e27 TM |
5593 | |
5594 | void | |
5595 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5596 | { | |
5597 | get_stateid(cstate, &read->rd_stateid); | |
5598 | } | |
5599 | ||
5600 | void | |
5601 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5602 | { | |
5603 | get_stateid(cstate, &write->wr_stateid); | |
5604 | } |