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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
6282cd56 | 44 | #include <linux/hash.h> |
9a74af21 | 45 | #include "xdr4.h" |
06b332a5 | 46 | #include "xdr4cb.h" |
0a3adade | 47 | #include "vfs.h" |
bfa4b365 | 48 | #include "current_stateid.h" |
1da177e4 | 49 | |
5e1533c7 SK |
50 | #include "netns.h" |
51 | ||
1da177e4 LT |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
53 | ||
f32f3c2d BF |
54 | #define all_ones {{~0,~0},~0} |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
fe0750e5 | 73 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 74 | |
8b671b80 BF |
75 | /* Locking: */ |
76 | ||
77 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 78 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 79 | |
8b671b80 BF |
80 | /* |
81 | * Currently used for the del_recall_lru and file hash table. In an | |
82 | * effort to decrease the scope of the client_mutex, this spinlock may | |
83 | * eventually cover more: | |
84 | */ | |
cdc97505 | 85 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 86 | |
abf1135b CH |
87 | static struct kmem_cache *openowner_slab; |
88 | static struct kmem_cache *lockowner_slab; | |
89 | static struct kmem_cache *file_slab; | |
90 | static struct kmem_cache *stateid_slab; | |
91 | static struct kmem_cache *deleg_slab; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
66b2b9b2 | 99 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 100 | |
f0f51f5c | 101 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 102 | { |
f0f51f5c | 103 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
104 | } |
105 | ||
f0f51f5c | 106 | void nfsd4_put_session(struct nfsd4_session *ses) |
508dc6e1 | 107 | { |
f0f51f5c BF |
108 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) |
109 | free_session(ses); | |
66b2b9b2 BF |
110 | } |
111 | ||
f0f51f5c | 112 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 113 | { |
f0f51f5c | 114 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
115 | return nfserr_jukebox; |
116 | ses->se_flags |= NFS4_SESSION_DEAD; | |
117 | return nfs_ok; | |
508dc6e1 BH |
118 | } |
119 | ||
66b2b9b2 | 120 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 121 | { |
66b2b9b2 BF |
122 | if (is_session_dead(ses)) |
123 | return nfserr_badsession; | |
124 | atomic_inc(&ses->se_ref); | |
125 | return nfs_ok; | |
508dc6e1 BH |
126 | } |
127 | ||
1da177e4 LT |
128 | void |
129 | nfs4_unlock_state(void) | |
130 | { | |
353ab6e9 | 131 | mutex_unlock(&client_mutex); |
1da177e4 LT |
132 | } |
133 | ||
221a6876 BF |
134 | static bool is_client_expired(struct nfs4_client *clp) |
135 | { | |
136 | return clp->cl_time == 0; | |
137 | } | |
138 | ||
139 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
140 | { | |
141 | if (atomic_read(&clp->cl_refcount)) | |
142 | return nfserr_jukebox; | |
143 | clp->cl_time = 0; | |
144 | return nfs_ok; | |
145 | } | |
146 | ||
147 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
148 | { | |
149 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
150 | __be32 ret; | |
151 | ||
152 | spin_lock(&nn->client_lock); | |
153 | ret = mark_client_expired_locked(clp); | |
154 | spin_unlock(&nn->client_lock); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | static __be32 get_client_locked(struct nfs4_client *clp) | |
159 | { | |
160 | if (is_client_expired(clp)) | |
161 | return nfserr_expired; | |
162 | atomic_inc(&clp->cl_refcount); | |
163 | return nfs_ok; | |
164 | } | |
165 | ||
166 | /* must be called under the client_lock */ | |
167 | static inline void | |
168 | renew_client_locked(struct nfs4_client *clp) | |
169 | { | |
170 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
171 | ||
172 | if (is_client_expired(clp)) { | |
173 | WARN_ON(1); | |
174 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
175 | __func__, | |
176 | clp->cl_clientid.cl_boot, | |
177 | clp->cl_clientid.cl_id); | |
178 | return; | |
179 | } | |
180 | ||
181 | dprintk("renewing client (clientid %08x/%08x)\n", | |
182 | clp->cl_clientid.cl_boot, | |
183 | clp->cl_clientid.cl_id); | |
184 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
185 | clp->cl_time = get_seconds(); | |
186 | } | |
187 | ||
188 | static inline void | |
189 | renew_client(struct nfs4_client *clp) | |
190 | { | |
191 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
192 | ||
193 | spin_lock(&nn->client_lock); | |
194 | renew_client_locked(clp); | |
195 | spin_unlock(&nn->client_lock); | |
196 | } | |
197 | ||
ba138435 | 198 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
199 | { |
200 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
201 | return; | |
202 | if (!is_client_expired(clp)) | |
203 | renew_client_locked(clp); | |
204 | } | |
205 | ||
206 | void put_client_renew(struct nfs4_client *clp) | |
207 | { | |
208 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
209 | ||
210 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
211 | return; | |
212 | if (!is_client_expired(clp)) | |
213 | renew_client_locked(clp); | |
214 | spin_unlock(&nn->client_lock); | |
215 | } | |
216 | ||
217 | ||
1da177e4 LT |
218 | static inline u32 |
219 | opaque_hashval(const void *ptr, int nbytes) | |
220 | { | |
221 | unsigned char *cptr = (unsigned char *) ptr; | |
222 | ||
223 | u32 x = 0; | |
224 | while (nbytes--) { | |
225 | x *= 37; | |
226 | x += *cptr++; | |
227 | } | |
228 | return x; | |
229 | } | |
230 | ||
32513b40 BF |
231 | static void nfsd4_free_file(struct nfs4_file *f) |
232 | { | |
233 | kmem_cache_free(file_slab, f); | |
234 | } | |
235 | ||
13cd2184 N |
236 | static inline void |
237 | put_nfs4_file(struct nfs4_file *fi) | |
238 | { | |
cdc97505 | 239 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
89876f8c | 240 | hlist_del(&fi->fi_hash); |
cdc97505 | 241 | spin_unlock(&state_lock); |
8b671b80 | 242 | iput(fi->fi_inode); |
32513b40 | 243 | nfsd4_free_file(fi); |
8b671b80 | 244 | } |
13cd2184 N |
245 | } |
246 | ||
247 | static inline void | |
248 | get_nfs4_file(struct nfs4_file *fi) | |
249 | { | |
8b671b80 | 250 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
251 | } |
252 | ||
ef0f3390 | 253 | static int num_delegations; |
697ce9be | 254 | unsigned long max_delegations; |
ef0f3390 N |
255 | |
256 | /* | |
257 | * Open owner state (share locks) | |
258 | */ | |
259 | ||
16bfdaaf BF |
260 | /* hash tables for lock and open owners */ |
261 | #define OWNER_HASH_BITS 8 | |
262 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
263 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 264 | |
16bfdaaf | 265 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
266 | { |
267 | unsigned int ret; | |
268 | ||
269 | ret = opaque_hashval(ownername->data, ownername->len); | |
270 | ret += clientid; | |
16bfdaaf | 271 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 272 | } |
ef0f3390 | 273 | |
ef0f3390 N |
274 | /* hash table for nfs4_file */ |
275 | #define FILE_HASH_BITS 8 | |
276 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 277 | |
ddc04c41 BF |
278 | static unsigned int file_hashval(struct inode *ino) |
279 | { | |
280 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
281 | return hash_ptr(ino, FILE_HASH_BITS); | |
282 | } | |
283 | ||
89876f8c | 284 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 285 | |
3477565e BF |
286 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
287 | { | |
288 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
289 | atomic_inc(&fp->fi_access[oflag]); | |
290 | } | |
291 | ||
998db52c BF |
292 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
293 | { | |
294 | if (oflag == O_RDWR) { | |
3477565e BF |
295 | __nfs4_file_get_access(fp, O_RDONLY); |
296 | __nfs4_file_get_access(fp, O_WRONLY); | |
998db52c | 297 | } else |
3477565e | 298 | __nfs4_file_get_access(fp, oflag); |
998db52c BF |
299 | } |
300 | ||
301 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
302 | { |
303 | if (fp->fi_fds[oflag]) { | |
304 | fput(fp->fi_fds[oflag]); | |
305 | fp->fi_fds[oflag] = NULL; | |
306 | } | |
307 | } | |
308 | ||
998db52c | 309 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
310 | { |
311 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 312 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 313 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 314 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
315 | } |
316 | } | |
317 | ||
998db52c BF |
318 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
319 | { | |
320 | if (oflag == O_RDWR) { | |
321 | __nfs4_file_put_access(fp, O_RDONLY); | |
322 | __nfs4_file_put_access(fp, O_WRONLY); | |
323 | } else | |
324 | __nfs4_file_put_access(fp, oflag); | |
325 | } | |
326 | ||
3abdb607 BF |
327 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
328 | kmem_cache *slab) | |
2a74aba7 | 329 | { |
3abdb607 | 330 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 331 | struct nfs4_stid *stid; |
6136d2b4 | 332 | int new_id; |
2a74aba7 | 333 | |
3abdb607 BF |
334 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
335 | if (!stid) | |
336 | return NULL; | |
337 | ||
398c33aa | 338 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 339 | if (new_id < 0) |
3abdb607 | 340 | goto out_free; |
2a74aba7 | 341 | stid->sc_client = cl; |
3abdb607 BF |
342 | stid->sc_type = 0; |
343 | stid->sc_stateid.si_opaque.so_id = new_id; | |
344 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 345 | /* Will be incremented before return to client: */ |
3abdb607 | 346 | stid->sc_stateid.si_generation = 0; |
996e0938 | 347 | |
996e0938 | 348 | /* |
3abdb607 BF |
349 | * It shouldn't be a problem to reuse an opaque stateid value. |
350 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
351 | * example, a stray write retransmission could be accepted by | |
352 | * the server when it should have been rejected. Therefore, | |
353 | * adopt a trick from the sctp code to attempt to maximize the | |
354 | * amount of time until an id is reused, by ensuring they always | |
355 | * "increase" (mod INT_MAX): | |
996e0938 | 356 | */ |
3abdb607 BF |
357 | return stid; |
358 | out_free: | |
2c44a234 | 359 | kmem_cache_free(slab, stid); |
3abdb607 | 360 | return NULL; |
2a74aba7 BF |
361 | } |
362 | ||
4cdc951b BF |
363 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
364 | { | |
365 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
366 | } | |
367 | ||
6282cd56 N |
368 | /* |
369 | * When we recall a delegation, we should be careful not to hand it | |
370 | * out again straight away. | |
371 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
372 | * in which the filehandles of recalled delegations are "stored". | |
373 | * If a filehandle appear in either filter, a delegation is blocked. | |
374 | * When a delegation is recalled, the filehandle is stored in the "new" | |
375 | * filter. | |
376 | * Every 30 seconds we swap the filters and clear the "new" one, | |
377 | * unless both are empty of course. | |
378 | * | |
379 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
380 | * low 3 bytes as hash-table indices. | |
381 | * | |
382 | * 'state_lock', which is always held when block_delegations() is called, | |
383 | * is used to manage concurrent access. Testing does not need the lock | |
384 | * except when swapping the two filters. | |
385 | */ | |
386 | static struct bloom_pair { | |
387 | int entries, old_entries; | |
388 | time_t swap_time; | |
389 | int new; /* index into 'set' */ | |
390 | DECLARE_BITMAP(set[2], 256); | |
391 | } blocked_delegations; | |
392 | ||
393 | static int delegation_blocked(struct knfsd_fh *fh) | |
394 | { | |
395 | u32 hash; | |
396 | struct bloom_pair *bd = &blocked_delegations; | |
397 | ||
398 | if (bd->entries == 0) | |
399 | return 0; | |
400 | if (seconds_since_boot() - bd->swap_time > 30) { | |
401 | spin_lock(&state_lock); | |
402 | if (seconds_since_boot() - bd->swap_time > 30) { | |
403 | bd->entries -= bd->old_entries; | |
404 | bd->old_entries = bd->entries; | |
405 | memset(bd->set[bd->new], 0, | |
406 | sizeof(bd->set[0])); | |
407 | bd->new = 1-bd->new; | |
408 | bd->swap_time = seconds_since_boot(); | |
409 | } | |
410 | spin_unlock(&state_lock); | |
411 | } | |
412 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
413 | if (test_bit(hash&255, bd->set[0]) && | |
414 | test_bit((hash>>8)&255, bd->set[0]) && | |
415 | test_bit((hash>>16)&255, bd->set[0])) | |
416 | return 1; | |
417 | ||
418 | if (test_bit(hash&255, bd->set[1]) && | |
419 | test_bit((hash>>8)&255, bd->set[1]) && | |
420 | test_bit((hash>>16)&255, bd->set[1])) | |
421 | return 1; | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static void block_delegations(struct knfsd_fh *fh) | |
427 | { | |
428 | u32 hash; | |
429 | struct bloom_pair *bd = &blocked_delegations; | |
430 | ||
431 | hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); | |
432 | ||
433 | __set_bit(hash&255, bd->set[bd->new]); | |
434 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
435 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
436 | if (bd->entries == 0) | |
437 | bd->swap_time = seconds_since_boot(); | |
438 | bd->entries += 1; | |
439 | } | |
440 | ||
1da177e4 | 441 | static struct nfs4_delegation * |
99c41515 | 442 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
443 | { |
444 | struct nfs4_delegation *dp; | |
1da177e4 LT |
445 | |
446 | dprintk("NFSD alloc_init_deleg\n"); | |
c2f1a551 | 447 | if (num_delegations > max_delegations) |
ef0f3390 | 448 | return NULL; |
6282cd56 N |
449 | if (delegation_blocked(¤t_fh->fh_handle)) |
450 | return NULL; | |
996e0938 | 451 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 452 | if (dp == NULL) |
1da177e4 | 453 | return dp; |
2a74aba7 BF |
454 | /* |
455 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
456 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
457 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
458 | */ |
459 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 460 | num_delegations++; |
ea1da636 N |
461 | INIT_LIST_HEAD(&dp->dl_perfile); |
462 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 463 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
bf7bd3e9 | 464 | dp->dl_file = NULL; |
99c41515 | 465 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 466 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
467 | dp->dl_time = 0; |
468 | atomic_set(&dp->dl_count, 1); | |
57725155 | 469 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
470 | return dp; |
471 | } | |
472 | ||
68a33961 | 473 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
474 | { |
475 | struct idr *stateids = &s->sc_client->cl_stateids; | |
476 | ||
477 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
478 | } |
479 | ||
9857df81 BH |
480 | static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) |
481 | { | |
482 | kmem_cache_free(slab, s); | |
483 | } | |
484 | ||
1da177e4 LT |
485 | void |
486 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
487 | { | |
488 | if (atomic_dec_and_test(&dp->dl_count)) { | |
9857df81 | 489 | nfs4_free_stid(deleg_slab, &dp->dl_stid); |
ef0f3390 | 490 | num_delegations--; |
1da177e4 LT |
491 | } |
492 | } | |
493 | ||
acfdf5c3 | 494 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 495 | { |
cbf7a75b BF |
496 | if (!fp->fi_lease) |
497 | return; | |
acfdf5c3 BF |
498 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
499 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
500 | fp->fi_lease = NULL; | |
4ee63624 | 501 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
502 | fp->fi_deleg_file = NULL; |
503 | } | |
1da177e4 LT |
504 | } |
505 | ||
6136d2b4 BF |
506 | static void unhash_stid(struct nfs4_stid *s) |
507 | { | |
3abdb607 | 508 | s->sc_type = 0; |
6136d2b4 BF |
509 | } |
510 | ||
931ee56c BH |
511 | static void |
512 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) | |
513 | { | |
cdc97505 | 514 | lockdep_assert_held(&state_lock); |
931ee56c | 515 | |
3fb87d13 | 516 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c BH |
517 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
518 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); | |
519 | } | |
520 | ||
1da177e4 LT |
521 | /* Called under the state lock. */ |
522 | static void | |
523 | unhash_delegation(struct nfs4_delegation *dp) | |
524 | { | |
cdc97505 | 525 | spin_lock(&state_lock); |
931ee56c | 526 | list_del_init(&dp->dl_perclnt); |
5d926e8c | 527 | list_del_init(&dp->dl_perfile); |
1da177e4 | 528 | list_del_init(&dp->dl_recall_lru); |
cdc97505 | 529 | spin_unlock(&state_lock); |
cbf7a75b BF |
530 | if (dp->dl_file) { |
531 | nfs4_put_deleg_lease(dp->dl_file); | |
532 | put_nfs4_file(dp->dl_file); | |
533 | dp->dl_file = NULL; | |
534 | } | |
3bd64a5b BF |
535 | } |
536 | ||
537 | ||
538 | ||
539 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
540 | { | |
541 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 542 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
543 | nfs4_put_delegation(dp); |
544 | } | |
545 | ||
3bd64a5b BF |
546 | static void destroy_delegation(struct nfs4_delegation *dp) |
547 | { | |
548 | unhash_delegation(dp); | |
549 | remove_stid(&dp->dl_stid); | |
550 | nfs4_put_delegation(dp); | |
551 | } | |
552 | ||
553 | static void revoke_delegation(struct nfs4_delegation *dp) | |
554 | { | |
555 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
556 | ||
557 | if (clp->cl_minorversion == 0) | |
558 | destroy_delegation(dp); | |
559 | else { | |
560 | unhash_delegation(dp); | |
561 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
562 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
563 | } | |
564 | } | |
565 | ||
1da177e4 LT |
566 | /* |
567 | * SETCLIENTID state | |
568 | */ | |
569 | ||
ddc04c41 BF |
570 | static unsigned int clientid_hashval(u32 id) |
571 | { | |
572 | return id & CLIENT_HASH_MASK; | |
573 | } | |
574 | ||
575 | static unsigned int clientstr_hashval(const char *name) | |
576 | { | |
577 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
578 | } | |
579 | ||
f9d7562f BF |
580 | /* |
581 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
582 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
583 | * only what share bits are currently in force, but also what | |
584 | * combinations of share bits previous opens have used. This allows us | |
585 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
586 | * return an error if the client attempt to downgrade to a combination | |
587 | * of share bits not explicable by closing some of its previous opens. | |
588 | * | |
589 | * XXX: This enforcement is actually incomplete, since we don't keep | |
590 | * track of access/deny bit combinations; so, e.g., we allow: | |
591 | * | |
592 | * OPEN allow read, deny write | |
593 | * OPEN allow both, deny none | |
594 | * DOWNGRADE allow read, deny none | |
595 | * | |
596 | * which we should reject. | |
597 | */ | |
5ae037e5 JL |
598 | static unsigned int |
599 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 600 | int i; |
5ae037e5 | 601 | unsigned int access = 0; |
f9d7562f | 602 | |
f9d7562f BF |
603 | for (i = 1; i < 4; i++) { |
604 | if (test_bit(i, &bmap)) | |
5ae037e5 | 605 | access |= i; |
f9d7562f | 606 | } |
5ae037e5 | 607 | return access; |
f9d7562f BF |
608 | } |
609 | ||
3a328614 | 610 | static bool |
dcef0413 | 611 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
612 | unsigned int access, deny; |
613 | ||
5ae037e5 JL |
614 | access = bmap_to_share_mode(stp->st_access_bmap); |
615 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 616 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
617 | return false; |
618 | return true; | |
f9d7562f BF |
619 | } |
620 | ||
82c5ff1b JL |
621 | /* set share access for a given stateid */ |
622 | static inline void | |
623 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
624 | { | |
625 | __set_bit(access, &stp->st_access_bmap); | |
626 | } | |
627 | ||
628 | /* clear share access for a given stateid */ | |
629 | static inline void | |
630 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
631 | { | |
632 | __clear_bit(access, &stp->st_access_bmap); | |
633 | } | |
634 | ||
635 | /* test whether a given stateid has access */ | |
636 | static inline bool | |
637 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
638 | { | |
639 | return test_bit(access, &stp->st_access_bmap); | |
640 | } | |
641 | ||
ce0fc43c JL |
642 | /* set share deny for a given stateid */ |
643 | static inline void | |
644 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
645 | { | |
646 | __set_bit(access, &stp->st_deny_bmap); | |
647 | } | |
648 | ||
649 | /* clear share deny for a given stateid */ | |
650 | static inline void | |
651 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
652 | { | |
653 | __clear_bit(access, &stp->st_deny_bmap); | |
654 | } | |
655 | ||
656 | /* test whether a given stateid is denying specific access */ | |
657 | static inline bool | |
658 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
659 | { | |
660 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
661 | } |
662 | ||
663 | static int nfs4_access_to_omode(u32 access) | |
664 | { | |
8f34a430 | 665 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
666 | case NFS4_SHARE_ACCESS_READ: |
667 | return O_RDONLY; | |
668 | case NFS4_SHARE_ACCESS_WRITE: | |
669 | return O_WRONLY; | |
670 | case NFS4_SHARE_ACCESS_BOTH: | |
671 | return O_RDWR; | |
672 | } | |
063b0fb9 BF |
673 | WARN_ON_ONCE(1); |
674 | return O_RDONLY; | |
f9d7562f BF |
675 | } |
676 | ||
82c5ff1b JL |
677 | /* release all access and file references for a given stateid */ |
678 | static void | |
679 | release_all_access(struct nfs4_ol_stateid *stp) | |
680 | { | |
681 | int i; | |
682 | ||
683 | for (i = 1; i < 4; i++) { | |
684 | if (test_access(i, stp)) | |
685 | nfs4_file_put_access(stp->st_file, | |
686 | nfs4_access_to_omode(i)); | |
687 | clear_access(i, stp); | |
688 | } | |
689 | } | |
690 | ||
dcef0413 | 691 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 692 | { |
529d7b2a BF |
693 | list_del(&stp->st_perfile); |
694 | list_del(&stp->st_perstateowner); | |
695 | } | |
696 | ||
dcef0413 | 697 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 698 | { |
82c5ff1b | 699 | release_all_access(stp); |
a96e5b90 | 700 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
701 | stp->st_file = NULL; |
702 | } | |
703 | ||
dcef0413 | 704 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 705 | { |
68a33961 | 706 | remove_stid(&stp->st_stid); |
9857df81 | 707 | nfs4_free_stid(stateid_slab, &stp->st_stid); |
529d7b2a BF |
708 | } |
709 | ||
dcef0413 | 710 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
711 | { |
712 | struct file *file; | |
713 | ||
714 | unhash_generic_stateid(stp); | |
6136d2b4 | 715 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
716 | file = find_any_file(stp->st_file); |
717 | if (file) | |
fe0750e5 | 718 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 719 | close_generic_stateid(stp); |
529d7b2a BF |
720 | free_generic_stateid(stp); |
721 | } | |
722 | ||
fe0750e5 | 723 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 724 | { |
dcef0413 | 725 | struct nfs4_ol_stateid *stp; |
529d7b2a | 726 | |
fe0750e5 BF |
727 | list_del(&lo->lo_owner.so_strhash); |
728 | list_del(&lo->lo_perstateid); | |
009673b4 | 729 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
730 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
731 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 732 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
733 | release_lock_stateid(stp); |
734 | } | |
735 | } | |
736 | ||
50cc6231 TM |
737 | static void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
738 | { | |
739 | kfree(lo->lo_owner.so_owner.data); | |
740 | kmem_cache_free(lockowner_slab, lo); | |
741 | } | |
742 | ||
fe0750e5 | 743 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 744 | { |
fe0750e5 BF |
745 | unhash_lockowner(lo); |
746 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
747 | } |
748 | ||
749 | static void | |
dcef0413 | 750 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 751 | { |
fe0750e5 | 752 | struct nfs4_lockowner *lo; |
529d7b2a BF |
753 | |
754 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
755 | lo = list_entry(open_stp->st_lockowners.next, |
756 | struct nfs4_lockowner, lo_perstateid); | |
757 | release_lockowner(lo); | |
529d7b2a BF |
758 | } |
759 | } | |
760 | ||
38c387b5 | 761 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
762 | { |
763 | unhash_generic_stateid(stp); | |
764 | release_stateid_lockowners(stp); | |
38c387b5 BF |
765 | close_generic_stateid(stp); |
766 | } | |
767 | ||
768 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
769 | { | |
770 | unhash_open_stateid(stp); | |
2283963f BF |
771 | free_generic_stateid(stp); |
772 | } | |
773 | ||
fe0750e5 | 774 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 775 | { |
dcef0413 | 776 | struct nfs4_ol_stateid *stp; |
f1d110ca | 777 | |
fe0750e5 BF |
778 | list_del(&oo->oo_owner.so_strhash); |
779 | list_del(&oo->oo_perclient); | |
780 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
781 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 782 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 783 | release_open_stateid(stp); |
f1d110ca BF |
784 | } |
785 | } | |
786 | ||
f7a4d872 BF |
787 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
788 | { | |
789 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
790 | ||
791 | if (s) { | |
f7a4d872 BF |
792 | free_generic_stateid(s); |
793 | oo->oo_last_closed_stid = NULL; | |
794 | } | |
795 | } | |
796 | ||
50cc6231 TM |
797 | static void nfs4_free_openowner(struct nfs4_openowner *oo) |
798 | { | |
799 | kfree(oo->oo_owner.so_owner.data); | |
800 | kmem_cache_free(openowner_slab, oo); | |
801 | } | |
802 | ||
fe0750e5 | 803 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 804 | { |
fe0750e5 BF |
805 | unhash_openowner(oo); |
806 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 807 | release_last_closed_stateid(oo); |
fe0750e5 | 808 | nfs4_free_openowner(oo); |
f1d110ca BF |
809 | } |
810 | ||
5282fd72 ME |
811 | static inline int |
812 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
813 | { | |
814 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
815 | ||
816 | return sid->sequence % SESSION_HASH_SIZE; | |
817 | } | |
818 | ||
8f199b82 | 819 | #ifdef NFSD_DEBUG |
5282fd72 ME |
820 | static inline void |
821 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
822 | { | |
823 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
824 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
825 | } | |
8f199b82 TM |
826 | #else |
827 | static inline void | |
828 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
829 | { | |
830 | } | |
831 | #endif | |
832 | ||
9411b1d4 BF |
833 | /* |
834 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
835 | * won't be used for replay. | |
836 | */ | |
837 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
838 | { | |
839 | struct nfs4_stateowner *so = cstate->replay_owner; | |
840 | ||
841 | if (nfserr == nfserr_replay_me) | |
842 | return; | |
843 | ||
844 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
845 | cstate->replay_owner = NULL; | |
846 | return; | |
847 | } | |
848 | if (!so) | |
849 | return; | |
850 | if (so->so_is_open_owner) | |
851 | release_last_closed_stateid(openowner(so)); | |
852 | so->so_seqid++; | |
853 | return; | |
854 | } | |
5282fd72 | 855 | |
ec6b5d7b AA |
856 | static void |
857 | gen_sessionid(struct nfsd4_session *ses) | |
858 | { | |
859 | struct nfs4_client *clp = ses->se_client; | |
860 | struct nfsd4_sessionid *sid; | |
861 | ||
862 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
863 | sid->clientid = clp->cl_clientid; | |
864 | sid->sequence = current_sessionid++; | |
865 | sid->reserved = 0; | |
866 | } | |
867 | ||
868 | /* | |
a649637c AA |
869 | * The protocol defines ca_maxresponssize_cached to include the size of |
870 | * the rpc header, but all we need to cache is the data starting after | |
871 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
872 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
873 | * value that is the number of bytes in our cache plus a few additional | |
874 | * bytes. In order to stay on the safe side, and not promise more than | |
875 | * we can cache, those additional bytes must be the minimum possible: 24 | |
876 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
877 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
878 | * for the SEQUENCE op response: | |
879 | */ | |
880 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
881 | ||
557ce264 AA |
882 | static void |
883 | free_session_slots(struct nfsd4_session *ses) | |
884 | { | |
885 | int i; | |
886 | ||
887 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
888 | kfree(ses->se_slots[i]); | |
889 | } | |
890 | ||
a649637c | 891 | /* |
efe0cb6d BF |
892 | * We don't actually need to cache the rpc and session headers, so we |
893 | * can allocate a little less for each slot: | |
894 | */ | |
55c760cf | 895 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 896 | { |
55c760cf | 897 | u32 size; |
efe0cb6d | 898 | |
55c760cf BF |
899 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
900 | size = 0; | |
901 | else | |
902 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
903 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 904 | } |
ec6b5d7b | 905 | |
5b6feee9 BF |
906 | /* |
907 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 908 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 909 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 910 | */ |
55c760cf | 911 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 912 | { |
55c760cf BF |
913 | u32 slotsize = slot_bytes(ca); |
914 | u32 num = ca->maxreqs; | |
5b6feee9 | 915 | int avail; |
ec6b5d7b | 916 | |
5b6feee9 | 917 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
918 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
919 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
920 | num = min_t(int, num, avail / slotsize); |
921 | nfsd_drc_mem_used += num * slotsize; | |
922 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 923 | |
5b6feee9 BF |
924 | return num; |
925 | } | |
ec6b5d7b | 926 | |
55c760cf | 927 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 928 | { |
55c760cf BF |
929 | int slotsize = slot_bytes(ca); |
930 | ||
4bd9b0f4 | 931 | spin_lock(&nfsd_drc_lock); |
55c760cf | 932 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 933 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 934 | } |
ec6b5d7b | 935 | |
60810e54 KM |
936 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
937 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 938 | { |
60810e54 KM |
939 | int numslots = fattrs->maxreqs; |
940 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
941 | struct nfsd4_session *new; |
942 | int mem, i; | |
a649637c | 943 | |
5b6feee9 BF |
944 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
945 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
946 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 947 | |
5b6feee9 BF |
948 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
949 | if (!new) | |
950 | return NULL; | |
557ce264 | 951 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 952 | for (i = 0; i < numslots; i++) { |
55c760cf | 953 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 954 | if (!new->se_slots[i]) |
557ce264 | 955 | goto out_free; |
557ce264 | 956 | } |
60810e54 KM |
957 | |
958 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
959 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
960 | ||
5b6feee9 BF |
961 | return new; |
962 | out_free: | |
963 | while (i--) | |
964 | kfree(new->se_slots[i]); | |
965 | kfree(new); | |
966 | return NULL; | |
ec6b5d7b AA |
967 | } |
968 | ||
19cf5c02 BF |
969 | static void free_conn(struct nfsd4_conn *c) |
970 | { | |
971 | svc_xprt_put(c->cn_xprt); | |
972 | kfree(c); | |
973 | } | |
ec6b5d7b | 974 | |
19cf5c02 BF |
975 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
976 | { | |
977 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
978 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 979 | |
19cf5c02 BF |
980 | spin_lock(&clp->cl_lock); |
981 | if (!list_empty(&c->cn_persession)) { | |
982 | list_del(&c->cn_persession); | |
983 | free_conn(c); | |
984 | } | |
eea49806 | 985 | nfsd4_probe_callback(clp); |
2e4b7239 | 986 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 987 | } |
ec6b5d7b | 988 | |
d29c374c | 989 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 990 | { |
c7662518 | 991 | struct nfsd4_conn *conn; |
ec6b5d7b | 992 | |
c7662518 BF |
993 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
994 | if (!conn) | |
db90681d | 995 | return NULL; |
c7662518 BF |
996 | svc_xprt_get(rqstp->rq_xprt); |
997 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 998 | conn->cn_flags = flags; |
db90681d BF |
999 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1000 | return conn; | |
1001 | } | |
a649637c | 1002 | |
328ead28 BF |
1003 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1004 | { | |
1005 | conn->cn_session = ses; | |
1006 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1007 | } |
1008 | ||
db90681d | 1009 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1010 | { |
db90681d | 1011 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1012 | |
c7662518 | 1013 | spin_lock(&clp->cl_lock); |
328ead28 | 1014 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1015 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1016 | } |
1017 | ||
21b75b01 | 1018 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1019 | { |
19cf5c02 | 1020 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1021 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1022 | } |
1023 | ||
e1ff371f | 1024 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1025 | { |
21b75b01 | 1026 | int ret; |
ec6b5d7b | 1027 | |
db90681d | 1028 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1029 | ret = nfsd4_register_conn(conn); |
1030 | if (ret) | |
1031 | /* oops; xprt is already down: */ | |
1032 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 1033 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
1034 | /* callback channel may be back up */ |
1035 | nfsd4_probe_callback(ses->se_client); | |
1036 | } | |
c7662518 | 1037 | } |
ec6b5d7b | 1038 | |
e1ff371f | 1039 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1040 | { |
1041 | u32 dir = NFS4_CDFC4_FORE; | |
1042 | ||
e1ff371f | 1043 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1044 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1045 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1046 | } |
1047 | ||
1048 | /* must be called under client_lock */ | |
19cf5c02 | 1049 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1050 | { |
19cf5c02 BF |
1051 | struct nfs4_client *clp = s->se_client; |
1052 | struct nfsd4_conn *c; | |
ec6b5d7b | 1053 | |
19cf5c02 BF |
1054 | spin_lock(&clp->cl_lock); |
1055 | while (!list_empty(&s->se_conns)) { | |
1056 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1057 | list_del_init(&c->cn_persession); | |
1058 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1059 | |
19cf5c02 BF |
1060 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1061 | free_conn(c); | |
ec6b5d7b | 1062 | |
19cf5c02 BF |
1063 | spin_lock(&clp->cl_lock); |
1064 | } | |
1065 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1066 | } |
ec6b5d7b | 1067 | |
1377b69e BF |
1068 | static void __free_session(struct nfsd4_session *ses) |
1069 | { | |
1377b69e BF |
1070 | free_session_slots(ses); |
1071 | kfree(ses); | |
1072 | } | |
1073 | ||
66b2b9b2 | 1074 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1075 | { |
66b2b9b2 | 1076 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
1077 | |
1078 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 1079 | nfsd4_del_conns(ses); |
55c760cf | 1080 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1081 | __free_session(ses); |
c7662518 BF |
1082 | } |
1083 | ||
135ae827 | 1084 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1085 | { |
a827bcb2 | 1086 | int idx; |
1872de0e | 1087 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1088 | |
ec6b5d7b AA |
1089 | new->se_client = clp; |
1090 | gen_sessionid(new); | |
ec6b5d7b | 1091 | |
c7662518 BF |
1092 | INIT_LIST_HEAD(&new->se_conns); |
1093 | ||
ac7c46f2 | 1094 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1095 | new->se_flags = cses->flags; |
8b5ce5cd | 1096 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1097 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1098 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1099 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 1100 | spin_lock(&nn->client_lock); |
1872de0e | 1101 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1102 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1103 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1104 | spin_unlock(&clp->cl_lock); |
c9a49628 | 1105 | spin_unlock(&nn->client_lock); |
60810e54 | 1106 | |
dcbeaa68 | 1107 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1108 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1109 | /* |
1110 | * This is a little silly; with sessions there's no real | |
1111 | * use for the callback address. Use the peer address | |
1112 | * as a reasonable default for now, but consider fixing | |
1113 | * the rpc client not to require an address in the | |
1114 | * future: | |
1115 | */ | |
edd76786 BF |
1116 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1117 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1118 | } |
ec6b5d7b AA |
1119 | } |
1120 | ||
9089f1b4 | 1121 | /* caller must hold client_lock */ |
5282fd72 | 1122 | static struct nfsd4_session * |
1872de0e | 1123 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1124 | { |
1125 | struct nfsd4_session *elem; | |
1126 | int idx; | |
1872de0e | 1127 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1128 | |
1129 | dump_sessionid(__func__, sessionid); | |
1130 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1131 | /* Search in the appropriate list */ |
1872de0e | 1132 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1133 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1134 | NFS4_MAX_SESSIONID_LEN)) { | |
1135 | return elem; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | dprintk("%s: session not found\n", __func__); | |
1140 | return NULL; | |
1141 | } | |
1142 | ||
9089f1b4 | 1143 | /* caller must hold client_lock */ |
7116ed6b | 1144 | static void |
5282fd72 | 1145 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1146 | { |
1147 | list_del(&ses->se_hash); | |
4c649378 | 1148 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1149 | list_del(&ses->se_perclnt); |
4c649378 | 1150 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1151 | } |
1152 | ||
1da177e4 LT |
1153 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1154 | static int | |
2c142baa | 1155 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1156 | { |
2c142baa | 1157 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1158 | return 0; |
60adfc50 | 1159 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1160 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1161 | return 1; |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * XXX Should we use a slab cache ? | |
1166 | * This type of memory management is somewhat inefficient, but we use it | |
1167 | * anyway since SETCLIENTID is not a common operation. | |
1168 | */ | |
35bba9a3 | 1169 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1170 | { |
1171 | struct nfs4_client *clp; | |
1172 | ||
35bba9a3 BF |
1173 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1174 | if (clp == NULL) | |
1175 | return NULL; | |
67114fe6 | 1176 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1177 | if (clp->cl_name.data == NULL) { |
1178 | kfree(clp); | |
1179 | return NULL; | |
1da177e4 | 1180 | } |
35bba9a3 | 1181 | clp->cl_name.len = name.len; |
5694c93e TM |
1182 | INIT_LIST_HEAD(&clp->cl_sessions); |
1183 | idr_init(&clp->cl_stateids); | |
1184 | atomic_set(&clp->cl_refcount, 0); | |
1185 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; | |
1186 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1187 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1188 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1189 | INIT_LIST_HEAD(&clp->cl_lru); | |
1190 | INIT_LIST_HEAD(&clp->cl_callbacks); | |
1191 | INIT_LIST_HEAD(&clp->cl_revoked); | |
1192 | spin_lock_init(&clp->cl_lock); | |
1193 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 LT |
1194 | return clp; |
1195 | } | |
1196 | ||
4dd86e15 | 1197 | static void |
1da177e4 LT |
1198 | free_client(struct nfs4_client *clp) |
1199 | { | |
bca0ec65 | 1200 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1201 | |
1202 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1203 | while (!list_empty(&clp->cl_sessions)) { |
1204 | struct nfsd4_session *ses; | |
1205 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1206 | se_perclnt); | |
1207 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1208 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1209 | free_session(ses); | |
792c95dd | 1210 | } |
4cb57e30 | 1211 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
03a4e1f6 | 1212 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1213 | kfree(clp->cl_name.data); |
2d32b29a | 1214 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1215 | kfree(clp); |
1216 | } | |
1217 | ||
84d38ac9 BH |
1218 | /* must be called under the client_lock */ |
1219 | static inline void | |
1220 | unhash_client_locked(struct nfs4_client *clp) | |
1221 | { | |
792c95dd BF |
1222 | struct nfsd4_session *ses; |
1223 | ||
84d38ac9 | 1224 | list_del(&clp->cl_lru); |
4c649378 | 1225 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1226 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1227 | list_del_init(&ses->se_hash); | |
4c649378 | 1228 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1229 | } |
1230 | ||
1da177e4 | 1231 | static void |
0d22f68f | 1232 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1233 | { |
fe0750e5 | 1234 | struct nfs4_openowner *oo; |
1da177e4 | 1235 | struct nfs4_delegation *dp; |
1da177e4 | 1236 | struct list_head reaplist; |
382a62e7 | 1237 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1238 | |
1da177e4 | 1239 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 1240 | spin_lock(&state_lock); |
ea1da636 N |
1241 | while (!list_empty(&clp->cl_delegations)) { |
1242 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1243 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1244 | list_move(&dp->dl_recall_lru, &reaplist); |
1245 | } | |
cdc97505 | 1246 | spin_unlock(&state_lock); |
1da177e4 LT |
1247 | while (!list_empty(&reaplist)) { |
1248 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1249 | destroy_delegation(dp); |
1da177e4 | 1250 | } |
956c4fee BH |
1251 | list_splice_init(&clp->cl_revoked, &reaplist); |
1252 | while (!list_empty(&reaplist)) { | |
1253 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1254 | destroy_revoked_delegation(dp); | |
1255 | } | |
ea1da636 | 1256 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1257 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1258 | release_openowner(oo); | |
1da177e4 | 1259 | } |
6ff8da08 | 1260 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1261 | if (clp->cl_cb_conn.cb_xprt) |
1262 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1263 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1264 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1265 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1266 | else |
a99454aa | 1267 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1268 | spin_lock(&nn->client_lock); |
84d38ac9 | 1269 | unhash_client_locked(clp); |
221a6876 BF |
1270 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1271 | free_client(clp); | |
c9a49628 | 1272 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1273 | } |
1274 | ||
0d22f68f BF |
1275 | static void expire_client(struct nfs4_client *clp) |
1276 | { | |
1277 | nfsd4_client_record_remove(clp); | |
1278 | destroy_client(clp); | |
1279 | } | |
1280 | ||
35bba9a3 BF |
1281 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1282 | { | |
1283 | memcpy(target->cl_verifier.data, source->data, | |
1284 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1285 | } |
1286 | ||
35bba9a3 BF |
1287 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1288 | { | |
1da177e4 LT |
1289 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1290 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1291 | } | |
1292 | ||
03a4e1f6 | 1293 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1294 | { |
03a4e1f6 BF |
1295 | if (source->cr_principal) { |
1296 | target->cr_principal = | |
1297 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1298 | if (target->cr_principal == NULL) | |
1299 | return -ENOMEM; | |
1300 | } else | |
1301 | target->cr_principal = NULL; | |
d5497fc6 | 1302 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1303 | target->cr_uid = source->cr_uid; |
1304 | target->cr_gid = source->cr_gid; | |
1305 | target->cr_group_info = source->cr_group_info; | |
1306 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1307 | target->cr_gss_mech = source->cr_gss_mech; |
1308 | if (source->cr_gss_mech) | |
1309 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1310 | return 0; |
1da177e4 LT |
1311 | } |
1312 | ||
ac55fdc4 JL |
1313 | static long long |
1314 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1315 | { | |
1316 | long long res; | |
1317 | ||
1318 | res = o1->len - o2->len; | |
1319 | if (res) | |
1320 | return res; | |
1321 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1322 | } | |
1323 | ||
35bba9a3 | 1324 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1325 | { |
a55370a3 | 1326 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | static int | |
599e0a22 BF |
1330 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1331 | { | |
1332 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1333 | } |
1334 | ||
1335 | static int | |
599e0a22 BF |
1336 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1337 | { | |
1338 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1339 | } |
1340 | ||
8fbba96e BF |
1341 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1342 | { | |
1343 | int i; | |
1344 | ||
1345 | if (g1->ngroups != g2->ngroups) | |
1346 | return false; | |
1347 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1348 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1349 | return false; |
1350 | return true; | |
1351 | } | |
1352 | ||
68eb3508 BF |
1353 | /* |
1354 | * RFC 3530 language requires clid_inuse be returned when the | |
1355 | * "principal" associated with a requests differs from that previously | |
1356 | * used. We use uid, gid's, and gss principal string as our best | |
1357 | * approximation. We also don't want to allow non-gss use of a client | |
1358 | * established using gss: in theory cr_principal should catch that | |
1359 | * change, but in practice cr_principal can be null even in the gss case | |
1360 | * since gssd doesn't always pass down a principal string. | |
1361 | */ | |
1362 | static bool is_gss_cred(struct svc_cred *cr) | |
1363 | { | |
1364 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1365 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1366 | } | |
1367 | ||
1368 | ||
5559b50a | 1369 | static bool |
599e0a22 BF |
1370 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1371 | { | |
68eb3508 | 1372 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1373 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1374 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1375 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1376 | return false; | |
1377 | if (cr1->cr_principal == cr2->cr_principal) | |
1378 | return true; | |
1379 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1380 | return false; | |
5559b50a | 1381 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1382 | } |
1383 | ||
57266a6e BF |
1384 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1385 | { | |
1386 | struct svc_cred *cr = &rqstp->rq_cred; | |
1387 | u32 service; | |
1388 | ||
c4720591 BF |
1389 | if (!cr->cr_gss_mech) |
1390 | return false; | |
57266a6e BF |
1391 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
1392 | return service == RPC_GSS_SVC_INTEGRITY || | |
1393 | service == RPC_GSS_SVC_PRIVACY; | |
1394 | } | |
1395 | ||
1396 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1397 | { | |
1398 | struct svc_cred *cr = &rqstp->rq_cred; | |
1399 | ||
1400 | if (!cl->cl_mach_cred) | |
1401 | return true; | |
1402 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1403 | return false; | |
1404 | if (!svc_rqst_integrity_protected(rqstp)) | |
1405 | return false; | |
1406 | if (!cr->cr_principal) | |
1407 | return false; | |
1408 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1409 | } | |
1410 | ||
c212cecf | 1411 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1412 | { |
1413 | static u32 current_clientid = 1; | |
1414 | ||
2c142baa | 1415 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1416 | clp->cl_clientid.cl_id = current_clientid++; |
1417 | } | |
1418 | ||
deda2faa BF |
1419 | static void gen_confirm(struct nfs4_client *clp) |
1420 | { | |
ab4684d1 | 1421 | __be32 verf[2]; |
deda2faa | 1422 | static u32 i; |
1da177e4 | 1423 | |
ab4684d1 CL |
1424 | verf[0] = (__be32)get_seconds(); |
1425 | verf[1] = (__be32)i++; | |
1426 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1427 | } |
1428 | ||
38c2f4b1 | 1429 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1430 | { |
3abdb607 BF |
1431 | struct nfs4_stid *ret; |
1432 | ||
1433 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1434 | if (!ret || !ret->sc_type) | |
1435 | return NULL; | |
1436 | return ret; | |
4d71ab87 BF |
1437 | } |
1438 | ||
38c2f4b1 | 1439 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1440 | { |
1441 | struct nfs4_stid *s; | |
4d71ab87 | 1442 | |
38c2f4b1 | 1443 | s = find_stateid(cl, t); |
4d71ab87 BF |
1444 | if (!s) |
1445 | return NULL; | |
f459e453 | 1446 | if (typemask & s->sc_type) |
4581d140 | 1447 | return s; |
4581d140 BF |
1448 | return NULL; |
1449 | } | |
1450 | ||
2216d449 | 1451 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1452 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1453 | { | |
1454 | struct nfs4_client *clp; | |
1455 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1456 | int ret; |
c212cecf | 1457 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1458 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1459 | |
1460 | clp = alloc_client(name); | |
1461 | if (clp == NULL) | |
1462 | return NULL; | |
1463 | ||
03a4e1f6 BF |
1464 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1465 | if (ret) { | |
c9a49628 | 1466 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1467 | free_client(clp); |
c9a49628 | 1468 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1469 | return NULL; |
b09333c4 | 1470 | } |
57725155 | 1471 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1472 | clp->cl_time = get_seconds(); |
b09333c4 | 1473 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 RL |
1474 | copy_verf(clp, verf); |
1475 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1476 | gen_confirm(clp); |
edd76786 | 1477 | clp->cl_cb_session = NULL; |
c212cecf | 1478 | clp->net = net; |
b09333c4 RL |
1479 | return clp; |
1480 | } | |
1481 | ||
fd39ca9a | 1482 | static void |
ac55fdc4 JL |
1483 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1484 | { | |
1485 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1486 | struct nfs4_client *clp; | |
1487 | ||
1488 | while (*new) { | |
1489 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1490 | parent = *new; | |
1491 | ||
1492 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1493 | new = &((*new)->rb_left); | |
1494 | else | |
1495 | new = &((*new)->rb_right); | |
1496 | } | |
1497 | ||
1498 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1499 | rb_insert_color(&new_clp->cl_namenode, root); | |
1500 | } | |
1501 | ||
1502 | static struct nfs4_client * | |
1503 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1504 | { | |
1505 | long long cmp; | |
1506 | struct rb_node *node = root->rb_node; | |
1507 | struct nfs4_client *clp; | |
1508 | ||
1509 | while (node) { | |
1510 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1511 | cmp = compare_blob(&clp->cl_name, name); | |
1512 | if (cmp > 0) | |
1513 | node = node->rb_left; | |
1514 | else if (cmp < 0) | |
1515 | node = node->rb_right; | |
1516 | else | |
1517 | return clp; | |
1518 | } | |
1519 | return NULL; | |
1520 | } | |
1521 | ||
1522 | static void | |
1523 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1524 | { |
1525 | unsigned int idhashval; | |
0a7ec377 | 1526 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1527 | |
ac55fdc4 | 1528 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1529 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1530 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1531 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1532 | renew_client(clp); |
1da177e4 LT |
1533 | } |
1534 | ||
fd39ca9a | 1535 | static void |
1da177e4 LT |
1536 | move_to_confirmed(struct nfs4_client *clp) |
1537 | { | |
1538 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1539 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1540 | |
1541 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1542 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1543 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1544 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1545 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1546 | renew_client(clp); |
1547 | } | |
1548 | ||
1549 | static struct nfs4_client * | |
bfa85e83 | 1550 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1551 | { |
1552 | struct nfs4_client *clp; | |
1553 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1554 | ||
bfa85e83 | 1555 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1556 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1557 | if ((bool)clp->cl_minorversion != sessions) |
1558 | return NULL; | |
a50d2ad1 | 1559 | renew_client(clp); |
1da177e4 | 1560 | return clp; |
a50d2ad1 | 1561 | } |
1da177e4 LT |
1562 | } |
1563 | return NULL; | |
1564 | } | |
1565 | ||
bfa85e83 BF |
1566 | static struct nfs4_client * |
1567 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1568 | { | |
1569 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1570 | ||
1571 | return find_client_in_id_table(tbl, clid, sessions); | |
1572 | } | |
1573 | ||
1da177e4 | 1574 | static struct nfs4_client * |
0a7ec377 | 1575 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1576 | { |
bfa85e83 | 1577 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1578 | |
bfa85e83 | 1579 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1580 | } |
1581 | ||
6e5f15c9 | 1582 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1583 | { |
6e5f15c9 | 1584 | return clp->cl_exchange_flags != 0; |
e203d506 | 1585 | } |
a1bcecd2 | 1586 | |
28ce6054 | 1587 | static struct nfs4_client * |
382a62e7 | 1588 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1589 | { |
382a62e7 | 1590 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1591 | } |
1592 | ||
1593 | static struct nfs4_client * | |
a99454aa | 1594 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1595 | { |
a99454aa | 1596 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1597 | } |
1598 | ||
fd39ca9a | 1599 | static void |
6f3d772f | 1600 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1601 | { |
07263f1e | 1602 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1603 | struct sockaddr *sa = svc_addr(rqstp); |
1604 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1605 | unsigned short expected_family; |
1606 | ||
1607 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1608 | if (se->se_callback_netid_len == 3 && | |
1609 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1610 | expected_family = AF_INET; | |
1611 | else if (se->se_callback_netid_len == 4 && | |
1612 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1613 | expected_family = AF_INET6; | |
1614 | else | |
1da177e4 LT |
1615 | goto out_err; |
1616 | ||
c212cecf | 1617 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1618 | se->se_callback_addr_len, |
07263f1e BF |
1619 | (struct sockaddr *)&conn->cb_addr, |
1620 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1621 | |
07263f1e | 1622 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1623 | goto out_err; |
aa9a4ec7 | 1624 | |
07263f1e BF |
1625 | if (conn->cb_addr.ss_family == AF_INET6) |
1626 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1627 | |
07263f1e BF |
1628 | conn->cb_prog = se->se_callback_prog; |
1629 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1630 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1631 | return; |
1632 | out_err: | |
07263f1e BF |
1633 | conn->cb_addr.ss_family = AF_UNSPEC; |
1634 | conn->cb_addrlen = 0; | |
849823c5 | 1635 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1636 | "will not receive delegations\n", |
1637 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1638 | ||
1da177e4 LT |
1639 | return; |
1640 | } | |
1641 | ||
074fe897 | 1642 | /* |
067e1ace | 1643 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 1644 | */ |
074fe897 AA |
1645 | void |
1646 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1647 | { |
f5236013 | 1648 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
1649 | struct nfsd4_slot *slot = resp->cstate.slot; |
1650 | unsigned int base; | |
074fe897 | 1651 | |
557ce264 | 1652 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1653 | |
557ce264 AA |
1654 | slot->sl_opcnt = resp->opcnt; |
1655 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1656 | |
bf5c43c8 | 1657 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1658 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1659 | slot->sl_datalen = 0; |
bf864a31 | 1660 | return; |
074fe897 | 1661 | } |
f5236013 BF |
1662 | base = resp->cstate.data_offset; |
1663 | slot->sl_datalen = buf->len - base; | |
1664 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
557ce264 AA |
1665 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
1666 | return; | |
074fe897 AA |
1667 | } |
1668 | ||
1669 | /* | |
abfabf8c AA |
1670 | * Encode the replay sequence operation from the slot values. |
1671 | * If cachethis is FALSE encode the uncached rep error on the next | |
1672 | * operation which sets resp->p and increments resp->opcnt for | |
1673 | * nfs4svc_encode_compoundres. | |
074fe897 | 1674 | * |
074fe897 | 1675 | */ |
abfabf8c AA |
1676 | static __be32 |
1677 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1678 | struct nfsd4_compoundres *resp) | |
074fe897 | 1679 | { |
abfabf8c AA |
1680 | struct nfsd4_op *op; |
1681 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1682 | |
abfabf8c AA |
1683 | /* Encode the replayed sequence operation */ |
1684 | op = &args->ops[resp->opcnt - 1]; | |
1685 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1686 | |
abfabf8c | 1687 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1688 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1689 | op = &args->ops[resp->opcnt++]; |
1690 | op->status = nfserr_retry_uncached_rep; | |
1691 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1692 | } |
abfabf8c | 1693 | return op->status; |
074fe897 AA |
1694 | } |
1695 | ||
1696 | /* | |
557ce264 AA |
1697 | * The sequence operation is not cached because we can use the slot and |
1698 | * session values. | |
074fe897 | 1699 | */ |
3ca2eb98 | 1700 | static __be32 |
bf864a31 AA |
1701 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1702 | struct nfsd4_sequence *seq) | |
074fe897 | 1703 | { |
557ce264 | 1704 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
1705 | struct xdr_stream *xdr = &resp->xdr; |
1706 | __be32 *p; | |
074fe897 AA |
1707 | __be32 status; |
1708 | ||
557ce264 | 1709 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1710 | |
abfabf8c | 1711 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 1712 | if (status) |
abfabf8c | 1713 | return status; |
074fe897 | 1714 | |
f5236013 BF |
1715 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
1716 | if (!p) { | |
1717 | WARN_ON_ONCE(1); | |
1718 | return nfserr_serverfault; | |
1719 | } | |
1720 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
1721 | xdr_commit_encode(xdr); | |
074fe897 | 1722 | |
557ce264 | 1723 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 1724 | return slot->sl_status; |
074fe897 AA |
1725 | } |
1726 | ||
0733d213 AA |
1727 | /* |
1728 | * Set the exchange_id flags returned by the server. | |
1729 | */ | |
1730 | static void | |
1731 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1732 | { | |
1733 | /* pNFS is not supported */ | |
1734 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1735 | ||
1736 | /* Referrals are supported, Migration is not. */ | |
1737 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1738 | ||
1739 | /* set the wire flags to return to client. */ | |
1740 | clid->flags = new->cl_exchange_flags; | |
1741 | } | |
1742 | ||
631fc9ea BF |
1743 | static bool client_has_state(struct nfs4_client *clp) |
1744 | { | |
1745 | /* | |
1746 | * Note clp->cl_openowners check isn't quite right: there's no | |
1747 | * need to count owners without stateid's. | |
1748 | * | |
1749 | * Also note we should probably be using this in 4.0 case too. | |
1750 | */ | |
6eccece9 BF |
1751 | return !list_empty(&clp->cl_openowners) |
1752 | || !list_empty(&clp->cl_delegations) | |
1753 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1754 | } |
1755 | ||
069b6ad4 AA |
1756 | __be32 |
1757 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1758 | struct nfsd4_compound_state *cstate, | |
1759 | struct nfsd4_exchange_id *exid) | |
1760 | { | |
0733d213 | 1761 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1762 | __be32 status; |
363168b4 | 1763 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1764 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1765 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1766 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1767 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1768 | |
363168b4 | 1769 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1770 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1771 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1772 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1773 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1774 | |
a084daf5 | 1775 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1776 | return nfserr_inval; |
1777 | ||
0733d213 | 1778 | switch (exid->spa_how) { |
57266a6e BF |
1779 | case SP4_MACH_CRED: |
1780 | if (!svc_rqst_integrity_protected(rqstp)) | |
1781 | return nfserr_inval; | |
0733d213 AA |
1782 | case SP4_NONE: |
1783 | break; | |
063b0fb9 BF |
1784 | default: /* checked by xdr code */ |
1785 | WARN_ON_ONCE(1); | |
0733d213 | 1786 | case SP4_SSV: |
dd30333c | 1787 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1788 | } |
1789 | ||
2dbb269d | 1790 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1791 | nfs4_lock_state(); |
382a62e7 | 1792 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1793 | if (conf) { |
83e08fd4 BF |
1794 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1795 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1796 | ||
136e658d BF |
1797 | if (update) { |
1798 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1799 | status = nfserr_inval; |
1a308118 BF |
1800 | goto out; |
1801 | } | |
57266a6e BF |
1802 | if (!mach_creds_match(conf, rqstp)) { |
1803 | status = nfserr_wrong_cred; | |
1804 | goto out; | |
1805 | } | |
136e658d | 1806 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1807 | status = nfserr_perm; |
136e658d BF |
1808 | goto out; |
1809 | } | |
1810 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1811 | status = nfserr_not_same; |
1812 | goto out; | |
1813 | } | |
136e658d BF |
1814 | /* case 6 */ |
1815 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1816 | new = conf; | |
1817 | goto out_copy; | |
0733d213 | 1818 | } |
136e658d | 1819 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1820 | if (client_has_state(conf)) { |
1821 | status = nfserr_clid_inuse; | |
0733d213 AA |
1822 | goto out; |
1823 | } | |
1824 | expire_client(conf); | |
1825 | goto out_new; | |
1826 | } | |
136e658d | 1827 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1828 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1829 | new = conf; |
1830 | goto out_copy; | |
1831 | } | |
1832 | /* case 5, client reboot */ | |
136e658d | 1833 | goto out_new; |
6ddbbbfe MS |
1834 | } |
1835 | ||
2dbb269d | 1836 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1837 | status = nfserr_noent; |
1838 | goto out; | |
0733d213 AA |
1839 | } |
1840 | ||
a99454aa | 1841 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1842 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1843 | expire_client(unconf); |
0733d213 | 1844 | |
2dbb269d | 1845 | /* case 1 (normal case) */ |
0733d213 | 1846 | out_new: |
2216d449 | 1847 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1848 | if (new == NULL) { |
4731030d | 1849 | status = nfserr_jukebox; |
0733d213 AA |
1850 | goto out; |
1851 | } | |
4f540e29 | 1852 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1853 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1854 | |
c212cecf | 1855 | gen_clid(new, nn); |
ac55fdc4 | 1856 | add_to_unconfirmed(new); |
0733d213 AA |
1857 | out_copy: |
1858 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1859 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1860 | ||
778df3f0 | 1861 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1862 | nfsd4_set_ex_flags(new, exid); |
1863 | ||
1864 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1865 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1866 | status = nfs_ok; |
1867 | ||
1868 | out: | |
1869 | nfs4_unlock_state(); | |
0733d213 | 1870 | return status; |
069b6ad4 AA |
1871 | } |
1872 | ||
57b7b43b | 1873 | static __be32 |
88e588d5 | 1874 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1875 | { |
88e588d5 AA |
1876 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1877 | slot_seqid); | |
b85d4c01 BH |
1878 | |
1879 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1880 | if (slot_inuse) { |
1881 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1882 | return nfserr_jukebox; |
1883 | else | |
1884 | return nfserr_seq_misordered; | |
1885 | } | |
f6d82485 | 1886 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1887 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1888 | return nfs_ok; |
88e588d5 | 1889 | if (seqid == slot_seqid) |
b85d4c01 | 1890 | return nfserr_replay_cache; |
b85d4c01 BH |
1891 | return nfserr_seq_misordered; |
1892 | } | |
1893 | ||
49557cc7 AA |
1894 | /* |
1895 | * Cache the create session result into the create session single DRC | |
1896 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1897 | * Do this for solo or embedded create session operations. | |
1898 | */ | |
1899 | static void | |
1900 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1901 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1902 | { |
1903 | slot->sl_status = nfserr; | |
1904 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1905 | } | |
1906 | ||
1907 | static __be32 | |
1908 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1909 | struct nfsd4_clid_slot *slot) | |
1910 | { | |
1911 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1912 | return slot->sl_status; | |
1913 | } | |
1914 | ||
1b74c25b MJ |
1915 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1916 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1917 | 1 + /* MIN tag is length with zero, only length */ \ | |
1918 | 3 + /* version, opcount, opcode */ \ | |
1919 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1920 | /* seqid, slotID, slotID, cache */ \ | |
1921 | 4 ) * sizeof(__be32)) | |
1922 | ||
1923 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1924 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1925 | 1 + /* status */ \ | |
1926 | 1 + /* MIN tag is length with zero, only length */ \ | |
1927 | 3 + /* opcount, opcode, opstatus*/ \ | |
1928 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1929 | /* seqid, slotID, slotID, slotID, status */ \ | |
1930 | 5 ) * sizeof(__be32)) | |
1931 | ||
55c760cf | 1932 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1933 | { |
55c760cf BF |
1934 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1935 | ||
373cd409 BF |
1936 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1937 | return nfserr_toosmall; | |
1938 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1939 | return nfserr_toosmall; | |
55c760cf BF |
1940 | ca->headerpadsz = 0; |
1941 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1942 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1943 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1944 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1945 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1946 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1947 | /* | |
1948 | * Note decreasing slot size below client's request may make it | |
1949 | * difficult for client to function correctly, whereas | |
1950 | * decreasing the number of slots will (just?) affect | |
1951 | * performance. When short on memory we therefore prefer to | |
1952 | * decrease number of slots instead of their size. Clients that | |
1953 | * request larger slots than they need will get poor results: | |
1954 | */ | |
1955 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1956 | if (!ca->maxreqs) | |
1957 | return nfserr_jukebox; | |
1958 | ||
373cd409 | 1959 | return nfs_ok; |
1b74c25b MJ |
1960 | } |
1961 | ||
8a891633 KM |
1962 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
1963 | RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) | |
1964 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ | |
1965 | RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) | |
1966 | ||
06b332a5 | 1967 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 1968 | { |
06b332a5 BF |
1969 | ca->headerpadsz = 0; |
1970 | ||
1971 | /* | |
1972 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
1973 | * don't even do gss on the backchannel yet. But this is still | |
1974 | * less than 1k. Tighten up this estimate in the unlikely event | |
1975 | * it turns out to be a problem for some client: | |
1976 | */ | |
8a891633 | 1977 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 1978 | return nfserr_toosmall; |
8a891633 | 1979 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
1980 | return nfserr_toosmall; |
1981 | ca->maxresp_cached = 0; | |
1982 | if (ca->maxops < 2) | |
1983 | return nfserr_toosmall; | |
1984 | ||
1985 | return nfs_ok; | |
1b74c25b MJ |
1986 | } |
1987 | ||
b78724b7 BF |
1988 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
1989 | { | |
1990 | switch (cbs->flavor) { | |
1991 | case RPC_AUTH_NULL: | |
1992 | case RPC_AUTH_UNIX: | |
1993 | return nfs_ok; | |
1994 | default: | |
1995 | /* | |
1996 | * GSS case: the spec doesn't allow us to return this | |
1997 | * error. But it also doesn't allow us not to support | |
1998 | * GSS. | |
1999 | * I'd rather this fail hard than return some error the | |
2000 | * client might think it can already handle: | |
2001 | */ | |
2002 | return nfserr_encr_alg_unsupp; | |
2003 | } | |
2004 | } | |
2005 | ||
069b6ad4 AA |
2006 | __be32 |
2007 | nfsd4_create_session(struct svc_rqst *rqstp, | |
2008 | struct nfsd4_compound_state *cstate, | |
2009 | struct nfsd4_create_session *cr_ses) | |
2010 | { | |
363168b4 | 2011 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 2012 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 2013 | struct nfsd4_session *new; |
81f0b2a4 | 2014 | struct nfsd4_conn *conn; |
49557cc7 | 2015 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 2016 | __be32 status = 0; |
8daae4dc | 2017 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 2018 | |
a62573dc MJ |
2019 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
2020 | return nfserr_inval; | |
b78724b7 BF |
2021 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
2022 | if (status) | |
2023 | return status; | |
55c760cf | 2024 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
2025 | if (status) |
2026 | return status; | |
2027 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 2028 | if (status) |
f403e450 | 2029 | goto out_release_drc_mem; |
81f0b2a4 | 2030 | status = nfserr_jukebox; |
60810e54 | 2031 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
2032 | if (!new) |
2033 | goto out_release_drc_mem; | |
81f0b2a4 BF |
2034 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
2035 | if (!conn) | |
2036 | goto out_free_session; | |
a62573dc | 2037 | |
ec6b5d7b | 2038 | nfs4_lock_state(); |
0a7ec377 | 2039 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 2040 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 2041 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
2042 | |
2043 | if (conf) { | |
57266a6e BF |
2044 | status = nfserr_wrong_cred; |
2045 | if (!mach_creds_match(conf, rqstp)) | |
2046 | goto out_free_conn; | |
49557cc7 AA |
2047 | cs_slot = &conf->cl_cs_slot; |
2048 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 2049 | if (status == nfserr_replay_cache) { |
49557cc7 | 2050 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 2051 | goto out_free_conn; |
49557cc7 | 2052 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 2053 | status = nfserr_seq_misordered; |
81f0b2a4 | 2054 | goto out_free_conn; |
ec6b5d7b | 2055 | } |
ec6b5d7b | 2056 | } else if (unconf) { |
8f9d3d3b | 2057 | struct nfs4_client *old; |
ec6b5d7b | 2058 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 2059 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 2060 | status = nfserr_clid_inuse; |
81f0b2a4 | 2061 | goto out_free_conn; |
ec6b5d7b | 2062 | } |
57266a6e BF |
2063 | status = nfserr_wrong_cred; |
2064 | if (!mach_creds_match(unconf, rqstp)) | |
2065 | goto out_free_conn; | |
49557cc7 AA |
2066 | cs_slot = &unconf->cl_cs_slot; |
2067 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
2068 | if (status) { |
2069 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 2070 | status = nfserr_seq_misordered; |
81f0b2a4 | 2071 | goto out_free_conn; |
ec6b5d7b | 2072 | } |
382a62e7 | 2073 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2074 | if (old) { |
2075 | status = mark_client_expired(old); | |
2076 | if (status) | |
2077 | goto out_free_conn; | |
8f9d3d3b | 2078 | expire_client(old); |
221a6876 | 2079 | } |
8f9d3d3b | 2080 | move_to_confirmed(unconf); |
ec6b5d7b AA |
2081 | conf = unconf; |
2082 | } else { | |
2083 | status = nfserr_stale_clientid; | |
81f0b2a4 | 2084 | goto out_free_conn; |
ec6b5d7b | 2085 | } |
81f0b2a4 | 2086 | status = nfs_ok; |
408b79bc BF |
2087 | /* |
2088 | * We do not support RDMA or persistent sessions | |
2089 | */ | |
2090 | cr_ses->flags &= ~SESSION4_PERSIST; | |
2091 | cr_ses->flags &= ~SESSION4_RDMA; | |
2092 | ||
81f0b2a4 BF |
2093 | init_session(rqstp, new, conf, cr_ses); |
2094 | nfsd4_init_conn(rqstp, conn, new); | |
2095 | ||
ac7c46f2 | 2096 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 2097 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 2098 | cs_slot->sl_seqid++; |
49557cc7 | 2099 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 2100 | |
49557cc7 AA |
2101 | /* cache solo and embedded create sessions under the state lock */ |
2102 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 2103 | nfs4_unlock_state(); |
ec6b5d7b | 2104 | return status; |
81f0b2a4 | 2105 | out_free_conn: |
266533c6 | 2106 | nfs4_unlock_state(); |
81f0b2a4 BF |
2107 | free_conn(conn); |
2108 | out_free_session: | |
2109 | __free_session(new); | |
55c760cf BF |
2110 | out_release_drc_mem: |
2111 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 2112 | return status; |
069b6ad4 AA |
2113 | } |
2114 | ||
1d1bc8f2 BF |
2115 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
2116 | { | |
2117 | switch (*dir) { | |
2118 | case NFS4_CDFC4_FORE: | |
2119 | case NFS4_CDFC4_BACK: | |
2120 | return nfs_ok; | |
2121 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2122 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2123 | *dir = NFS4_CDFC4_BOTH; | |
2124 | return nfs_ok; | |
2125 | }; | |
2126 | return nfserr_inval; | |
2127 | } | |
2128 | ||
cb73a9f4 BF |
2129 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2130 | { | |
2131 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2132 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2133 | __be32 status; |
cb73a9f4 | 2134 | |
b78724b7 BF |
2135 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2136 | if (status) | |
2137 | return status; | |
c9a49628 | 2138 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2139 | session->se_cb_prog = bc->bc_cb_program; |
2140 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2141 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2142 | |
2143 | nfsd4_probe_callback(session->se_client); | |
2144 | ||
2145 | return nfs_ok; | |
2146 | } | |
2147 | ||
1d1bc8f2 BF |
2148 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2149 | struct nfsd4_compound_state *cstate, | |
2150 | struct nfsd4_bind_conn_to_session *bcts) | |
2151 | { | |
2152 | __be32 status; | |
3ba63671 | 2153 | struct nfsd4_conn *conn; |
4f6e6c17 | 2154 | struct nfsd4_session *session; |
c9a49628 | 2155 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
2156 | |
2157 | if (!nfsd4_last_compound_op(rqstp)) | |
2158 | return nfserr_not_only_op; | |
4f6e6c17 | 2159 | nfs4_lock_state(); |
c9a49628 | 2160 | spin_lock(&nn->client_lock); |
4f6e6c17 | 2161 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 2162 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
2163 | status = nfserr_badsession; |
2164 | if (!session) | |
2165 | goto out; | |
57266a6e BF |
2166 | status = nfserr_wrong_cred; |
2167 | if (!mach_creds_match(session->se_client, rqstp)) | |
2168 | goto out; | |
1d1bc8f2 | 2169 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2170 | if (status) |
4f6e6c17 | 2171 | goto out; |
3ba63671 | 2172 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2173 | status = nfserr_jukebox; |
3ba63671 | 2174 | if (!conn) |
4f6e6c17 BF |
2175 | goto out; |
2176 | nfsd4_init_conn(rqstp, conn, session); | |
2177 | status = nfs_ok; | |
2178 | out: | |
2179 | nfs4_unlock_state(); | |
2180 | return status; | |
1d1bc8f2 BF |
2181 | } |
2182 | ||
5d4cec2f BF |
2183 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2184 | { | |
2185 | if (!session) | |
2186 | return 0; | |
2187 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2188 | } | |
2189 | ||
069b6ad4 AA |
2190 | __be32 |
2191 | nfsd4_destroy_session(struct svc_rqst *r, | |
2192 | struct nfsd4_compound_state *cstate, | |
2193 | struct nfsd4_destroy_session *sessionid) | |
2194 | { | |
e10e0cfc | 2195 | struct nfsd4_session *ses; |
abcdff09 | 2196 | __be32 status; |
f0f51f5c | 2197 | int ref_held_by_me = 0; |
c9a49628 | 2198 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 2199 | |
abcdff09 BF |
2200 | nfs4_lock_state(); |
2201 | status = nfserr_not_only_op; | |
5d4cec2f | 2202 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2203 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2204 | goto out; |
f0f51f5c | 2205 | ref_held_by_me++; |
57716355 | 2206 | } |
e10e0cfc | 2207 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2208 | spin_lock(&nn->client_lock); |
1872de0e | 2209 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
2210 | status = nfserr_badsession; |
2211 | if (!ses) | |
2212 | goto out_client_lock; | |
57266a6e BF |
2213 | status = nfserr_wrong_cred; |
2214 | if (!mach_creds_match(ses->se_client, r)) | |
66b2b9b2 | 2215 | goto out_client_lock; |
f0f51f5c BF |
2216 | nfsd4_get_session_locked(ses); |
2217 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); | |
66b2b9b2 | 2218 | if (status) |
f0f51f5c | 2219 | goto out_put_session; |
e10e0cfc | 2220 | unhash_session(ses); |
c9a49628 | 2221 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2222 | |
84f5f7cc | 2223 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2224 | |
c9a49628 | 2225 | spin_lock(&nn->client_lock); |
e10e0cfc | 2226 | status = nfs_ok; |
f0f51f5c BF |
2227 | out_put_session: |
2228 | nfsd4_put_session(ses); | |
abcdff09 BF |
2229 | out_client_lock: |
2230 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2231 | out: |
abcdff09 | 2232 | nfs4_unlock_state(); |
e10e0cfc | 2233 | return status; |
069b6ad4 AA |
2234 | } |
2235 | ||
a663bdd8 | 2236 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2237 | { |
2238 | struct nfsd4_conn *c; | |
2239 | ||
2240 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2241 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2242 | return c; |
2243 | } | |
2244 | } | |
2245 | return NULL; | |
2246 | } | |
2247 | ||
57266a6e | 2248 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2249 | { |
2250 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2251 | struct nfsd4_conn *c; |
57266a6e | 2252 | __be32 status = nfs_ok; |
21b75b01 | 2253 | int ret; |
328ead28 BF |
2254 | |
2255 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2256 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2257 | if (c) |
2258 | goto out_free; | |
2259 | status = nfserr_conn_not_bound_to_session; | |
2260 | if (clp->cl_mach_cred) | |
2261 | goto out_free; | |
328ead28 BF |
2262 | __nfsd4_hash_conn(new, ses); |
2263 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2264 | ret = nfsd4_register_conn(new); |
2265 | if (ret) | |
2266 | /* oops; xprt is already down: */ | |
2267 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2268 | return nfs_ok; |
2269 | out_free: | |
2270 | spin_unlock(&clp->cl_lock); | |
2271 | free_conn(new); | |
2272 | return status; | |
328ead28 BF |
2273 | } |
2274 | ||
868b89c3 MJ |
2275 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2276 | { | |
2277 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2278 | ||
2279 | return args->opcnt > session->se_fchannel.maxops; | |
2280 | } | |
2281 | ||
ae82a8d0 MJ |
2282 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2283 | struct nfsd4_session *session) | |
2284 | { | |
2285 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2286 | ||
2287 | return xb->len > session->se_fchannel.maxreq_sz; | |
2288 | } | |
2289 | ||
069b6ad4 | 2290 | __be32 |
b85d4c01 | 2291 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2292 | struct nfsd4_compound_state *cstate, |
2293 | struct nfsd4_sequence *seq) | |
2294 | { | |
f9bb94c4 | 2295 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 2296 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 2297 | struct nfsd4_session *session; |
221a6876 | 2298 | struct nfs4_client *clp; |
b85d4c01 | 2299 | struct nfsd4_slot *slot; |
a663bdd8 | 2300 | struct nfsd4_conn *conn; |
57b7b43b | 2301 | __be32 status; |
47ee5298 | 2302 | int buflen; |
c9a49628 | 2303 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2304 | |
f9bb94c4 AA |
2305 | if (resp->opcnt != 1) |
2306 | return nfserr_sequence_pos; | |
2307 | ||
a663bdd8 BF |
2308 | /* |
2309 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2310 | * below. | |
2311 | */ | |
2312 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2313 | if (!conn) | |
2314 | return nfserr_jukebox; | |
2315 | ||
c9a49628 | 2316 | spin_lock(&nn->client_lock); |
b85d4c01 | 2317 | status = nfserr_badsession; |
1872de0e | 2318 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2319 | if (!session) |
221a6876 BF |
2320 | goto out_no_session; |
2321 | clp = session->se_client; | |
2322 | status = get_client_locked(clp); | |
2323 | if (status) | |
2324 | goto out_no_session; | |
66b2b9b2 BF |
2325 | status = nfsd4_get_session_locked(session); |
2326 | if (status) | |
2327 | goto out_put_client; | |
b85d4c01 | 2328 | |
868b89c3 MJ |
2329 | status = nfserr_too_many_ops; |
2330 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2331 | goto out_put_session; |
868b89c3 | 2332 | |
ae82a8d0 MJ |
2333 | status = nfserr_req_too_big; |
2334 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2335 | goto out_put_session; |
ae82a8d0 | 2336 | |
b85d4c01 | 2337 | status = nfserr_badslot; |
6c18ba9f | 2338 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2339 | goto out_put_session; |
b85d4c01 | 2340 | |
557ce264 | 2341 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2342 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2343 | ||
a8dfdaeb AA |
2344 | /* We do not negotiate the number of slots yet, so set the |
2345 | * maxslots to the session maxreqs which is used to encode | |
2346 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2347 | seq->maxslots = session->se_fchannel.maxreqs; | |
2348 | ||
73e79482 BF |
2349 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2350 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2351 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2352 | status = nfserr_seq_misordered; |
2353 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2354 | goto out_put_session; |
b85d4c01 BH |
2355 | cstate->slot = slot; |
2356 | cstate->session = session; | |
da3846a2 | 2357 | /* Return the cached reply status and set cstate->status |
557ce264 | 2358 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2359 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2360 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2361 | goto out; |
b85d4c01 BH |
2362 | } |
2363 | if (status) | |
66b2b9b2 | 2364 | goto out_put_session; |
b85d4c01 | 2365 | |
57266a6e | 2366 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2367 | conn = NULL; |
57266a6e BF |
2368 | if (status) |
2369 | goto out_put_session; | |
328ead28 | 2370 | |
47ee5298 BF |
2371 | buflen = (seq->cachethis) ? |
2372 | session->se_fchannel.maxresp_cached : | |
2373 | session->se_fchannel.maxresp_sz; | |
2374 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
2375 | nfserr_rep_too_big; | |
a5cddc88 | 2376 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 2377 | goto out_put_session; |
32aaa62e | 2378 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
2379 | |
2380 | status = nfs_ok; | |
b85d4c01 | 2381 | /* Success! bump slot seqid */ |
b85d4c01 | 2382 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2383 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2384 | if (seq->cachethis) |
2385 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2386 | else |
2387 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2388 | |
2389 | cstate->slot = slot; | |
2390 | cstate->session = session; | |
2391 | ||
b85d4c01 | 2392 | out: |
221a6876 BF |
2393 | switch (clp->cl_cb_state) { |
2394 | case NFSD4_CB_DOWN: | |
2395 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2396 | break; | |
2397 | case NFSD4_CB_FAULT: | |
2398 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2399 | break; | |
2400 | default: | |
2401 | seq->status_flags = 0; | |
aaf84eb9 | 2402 | } |
3bd64a5b BF |
2403 | if (!list_empty(&clp->cl_revoked)) |
2404 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2405 | out_no_session: |
3f42d2c4 KM |
2406 | if (conn) |
2407 | free_conn(conn); | |
c9a49628 | 2408 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2409 | return status; |
66b2b9b2 BF |
2410 | out_put_session: |
2411 | nfsd4_put_session(session); | |
221a6876 BF |
2412 | out_put_client: |
2413 | put_client_renew_locked(clp); | |
2414 | goto out_no_session; | |
069b6ad4 AA |
2415 | } |
2416 | ||
345c2842 MJ |
2417 | __be32 |
2418 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2419 | { | |
2420 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2421 | __be32 status = 0; |
8daae4dc | 2422 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2423 | |
2424 | nfs4_lock_state(); | |
0a7ec377 | 2425 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2426 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2427 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2428 | |
2429 | if (conf) { | |
2430 | clp = conf; | |
2431 | ||
c0293b01 | 2432 | if (client_has_state(conf)) { |
345c2842 MJ |
2433 | status = nfserr_clientid_busy; |
2434 | goto out; | |
2435 | } | |
2436 | } else if (unconf) | |
2437 | clp = unconf; | |
2438 | else { | |
2439 | status = nfserr_stale_clientid; | |
2440 | goto out; | |
2441 | } | |
57266a6e BF |
2442 | if (!mach_creds_match(clp, rqstp)) { |
2443 | status = nfserr_wrong_cred; | |
2444 | goto out; | |
2445 | } | |
345c2842 MJ |
2446 | expire_client(clp); |
2447 | out: | |
2448 | nfs4_unlock_state(); | |
345c2842 MJ |
2449 | return status; |
2450 | } | |
2451 | ||
4dc6ec00 BF |
2452 | __be32 |
2453 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2454 | { | |
57b7b43b | 2455 | __be32 status = 0; |
bcecf1cc | 2456 | |
4dc6ec00 BF |
2457 | if (rc->rca_one_fs) { |
2458 | if (!cstate->current_fh.fh_dentry) | |
2459 | return nfserr_nofilehandle; | |
2460 | /* | |
2461 | * We don't take advantage of the rca_one_fs case. | |
2462 | * That's OK, it's optional, we can safely ignore it. | |
2463 | */ | |
2464 | return nfs_ok; | |
2465 | } | |
bcecf1cc | 2466 | |
4dc6ec00 | 2467 | nfs4_lock_state(); |
bcecf1cc | 2468 | status = nfserr_complete_already; |
a52d726b JL |
2469 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2470 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2471 | goto out; |
2472 | ||
2473 | status = nfserr_stale_clientid; | |
2474 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2475 | /* |
2476 | * The following error isn't really legal. | |
2477 | * But we only get here if the client just explicitly | |
2478 | * destroyed the client. Surely it no longer cares what | |
2479 | * error it gets back on an operation for the dead | |
2480 | * client. | |
2481 | */ | |
bcecf1cc MJ |
2482 | goto out; |
2483 | ||
2484 | status = nfs_ok; | |
2a4317c5 | 2485 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2486 | out: |
4dc6ec00 | 2487 | nfs4_unlock_state(); |
bcecf1cc | 2488 | return status; |
4dc6ec00 BF |
2489 | } |
2490 | ||
b37ad28b | 2491 | __be32 |
b591480b BF |
2492 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2493 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2494 | { |
a084daf5 | 2495 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2496 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2497 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2498 | __be32 status; |
c212cecf SK |
2499 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2500 | ||
63db4632 | 2501 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2502 | nfs4_lock_state(); |
382a62e7 | 2503 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2504 | if (conf) { |
63db4632 | 2505 | /* case 0: */ |
1da177e4 | 2506 | status = nfserr_clid_inuse; |
e203d506 BF |
2507 | if (clp_used_exchangeid(conf)) |
2508 | goto out; | |
026722c2 | 2509 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2510 | char addr_str[INET6_ADDRSTRLEN]; |
2511 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2512 | sizeof(addr_str)); | |
2513 | dprintk("NFSD: setclientid: string in use by client " | |
2514 | "at %s\n", addr_str); | |
1da177e4 LT |
2515 | goto out; |
2516 | } | |
1da177e4 | 2517 | } |
a99454aa | 2518 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2519 | if (unconf) |
2520 | expire_client(unconf); | |
3e772463 | 2521 | status = nfserr_jukebox; |
2216d449 | 2522 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2523 | if (new == NULL) |
2524 | goto out; | |
34b232bb | 2525 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2526 | /* case 1: probable callback update */ |
1da177e4 | 2527 | copy_clid(new, conf); |
34b232bb | 2528 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2529 | gen_clid(new, nn); |
8323c3b2 | 2530 | new->cl_minorversion = 0; |
6f3d772f | 2531 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2532 | add_to_unconfirmed(new); |
1da177e4 LT |
2533 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2534 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2535 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2536 | status = nfs_ok; | |
2537 | out: | |
2538 | nfs4_unlock_state(); | |
2539 | return status; | |
2540 | } | |
2541 | ||
2542 | ||
b37ad28b | 2543 | __be32 |
b591480b BF |
2544 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2545 | struct nfsd4_compound_state *cstate, | |
2546 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2547 | { |
21ab45a4 | 2548 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2549 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2550 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2551 | __be32 status; |
7f2210fa | 2552 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2553 | |
2c142baa | 2554 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2555 | return nfserr_stale_clientid; |
1da177e4 | 2556 | nfs4_lock_state(); |
21ab45a4 | 2557 | |
8daae4dc | 2558 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2559 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2560 | /* |
8695b90a BF |
2561 | * We try hard to give out unique clientid's, so if we get an |
2562 | * attempt to confirm the same clientid with a different cred, | |
2563 | * there's a bug somewhere. Let's charitably assume it's our | |
2564 | * bug. | |
a186e767 | 2565 | */ |
8695b90a BF |
2566 | status = nfserr_serverfault; |
2567 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2568 | goto out; | |
2569 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2570 | goto out; | |
63db4632 | 2571 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2572 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2573 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2574 | status = nfs_ok; |
90d700b7 BF |
2575 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2576 | status = nfserr_stale_clientid; | |
2577 | goto out; | |
2578 | } | |
2579 | status = nfs_ok; | |
2580 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2581 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2582 | nfsd4_probe_callback(conf); | |
2583 | expire_client(unconf); | |
90d700b7 | 2584 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2585 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2586 | if (conf) { |
2587 | status = mark_client_expired(conf); | |
2588 | if (status) | |
2589 | goto out; | |
8695b90a | 2590 | expire_client(conf); |
221a6876 | 2591 | } |
8695b90a | 2592 | move_to_confirmed(unconf); |
f3d03b92 | 2593 | nfsd4_probe_callback(unconf); |
08e8987c | 2594 | } |
1da177e4 | 2595 | out: |
1da177e4 LT |
2596 | nfs4_unlock_state(); |
2597 | return status; | |
2598 | } | |
2599 | ||
32513b40 BF |
2600 | static struct nfs4_file *nfsd4_alloc_file(void) |
2601 | { | |
2602 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2603 | } | |
2604 | ||
1da177e4 | 2605 | /* OPEN Share state helper functions */ |
32513b40 | 2606 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2607 | { |
1da177e4 LT |
2608 | unsigned int hashval = file_hashval(ino); |
2609 | ||
32513b40 | 2610 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2611 | INIT_LIST_HEAD(&fp->fi_stateids); |
2612 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2613 | fp->fi_inode = igrab(ino); | |
2614 | fp->fi_had_conflict = false; | |
2615 | fp->fi_lease = NULL; | |
2616 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2617 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
cdc97505 | 2618 | spin_lock(&state_lock); |
89876f8c | 2619 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
cdc97505 | 2620 | spin_unlock(&state_lock); |
1da177e4 LT |
2621 | } |
2622 | ||
e8ff2a84 | 2623 | void |
1da177e4 LT |
2624 | nfsd4_free_slabs(void) |
2625 | { | |
abf1135b CH |
2626 | kmem_cache_destroy(openowner_slab); |
2627 | kmem_cache_destroy(lockowner_slab); | |
2628 | kmem_cache_destroy(file_slab); | |
2629 | kmem_cache_destroy(stateid_slab); | |
2630 | kmem_cache_destroy(deleg_slab); | |
e60d4398 | 2631 | } |
1da177e4 | 2632 | |
72083396 | 2633 | int |
e60d4398 N |
2634 | nfsd4_init_slabs(void) |
2635 | { | |
fe0750e5 BF |
2636 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2637 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2638 | if (openowner_slab == NULL) | |
abf1135b | 2639 | goto out; |
fe0750e5 | 2640 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 2641 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2642 | if (lockowner_slab == NULL) |
abf1135b | 2643 | goto out_free_openowner_slab; |
e60d4398 | 2644 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 2645 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 2646 | if (file_slab == NULL) |
abf1135b | 2647 | goto out_free_lockowner_slab; |
5ac049ac | 2648 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2649 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 2650 | if (stateid_slab == NULL) |
abf1135b | 2651 | goto out_free_file_slab; |
5b2d21c1 | 2652 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2653 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 2654 | if (deleg_slab == NULL) |
abf1135b | 2655 | goto out_free_stateid_slab; |
e60d4398 | 2656 | return 0; |
abf1135b CH |
2657 | |
2658 | out_free_stateid_slab: | |
2659 | kmem_cache_destroy(stateid_slab); | |
2660 | out_free_file_slab: | |
2661 | kmem_cache_destroy(file_slab); | |
2662 | out_free_lockowner_slab: | |
2663 | kmem_cache_destroy(lockowner_slab); | |
2664 | out_free_openowner_slab: | |
2665 | kmem_cache_destroy(openowner_slab); | |
2666 | out: | |
e60d4398 N |
2667 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
2668 | return -ENOMEM; | |
1da177e4 LT |
2669 | } |
2670 | ||
ff194bd9 | 2671 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2672 | { |
ff194bd9 BF |
2673 | rp->rp_status = nfserr_serverfault; |
2674 | rp->rp_buflen = 0; | |
2675 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2676 | } |
2677 | ||
fe0750e5 | 2678 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2679 | { |
1da177e4 | 2680 | struct nfs4_stateowner *sop; |
1da177e4 | 2681 | |
fe0750e5 | 2682 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2683 | if (!sop) |
2684 | return NULL; | |
2685 | ||
2686 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2687 | if (!sop->so_owner.data) { | |
fe0750e5 | 2688 | kmem_cache_free(slab, sop); |
1da177e4 | 2689 | return NULL; |
ff194bd9 BF |
2690 | } |
2691 | sop->so_owner.len = owner->len; | |
2692 | ||
ea1da636 | 2693 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2694 | sop->so_client = clp; |
2695 | init_nfs4_replay(&sop->so_replay); | |
2696 | return sop; | |
2697 | } | |
2698 | ||
fe0750e5 | 2699 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2700 | { |
9b531137 SK |
2701 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2702 | ||
2703 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2704 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2705 | } |
2706 | ||
fe0750e5 | 2707 | static struct nfs4_openowner * |
ff194bd9 | 2708 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2709 | struct nfs4_openowner *oo; |
ff194bd9 | 2710 | |
fe0750e5 BF |
2711 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2712 | if (!oo) | |
ff194bd9 | 2713 | return NULL; |
fe0750e5 BF |
2714 | oo->oo_owner.so_is_open_owner = 1; |
2715 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2716 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2717 | oo->oo_time = 0; |
38c387b5 | 2718 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2719 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2720 | hash_openowner(oo, clp, strhashval); | |
2721 | return oo; | |
1da177e4 LT |
2722 | } |
2723 | ||
996e0938 | 2724 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2725 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2726 | |
3abdb607 | 2727 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2728 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2729 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2730 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2731 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2732 | get_nfs4_file(fp); |
1da177e4 | 2733 | stp->st_file = fp; |
1da177e4 LT |
2734 | stp->st_access_bmap = 0; |
2735 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2736 | set_access(open->op_share_access, stp); |
ce0fc43c | 2737 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2738 | stp->st_openstp = NULL; |
1da177e4 LT |
2739 | } |
2740 | ||
fd39ca9a | 2741 | static void |
73758fed | 2742 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2743 | { |
73758fed SK |
2744 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2745 | ||
fe0750e5 | 2746 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2747 | |
73758fed | 2748 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2749 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2750 | } |
2751 | ||
1da177e4 | 2752 | static int |
599e0a22 BF |
2753 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2754 | clientid_t *clid) | |
2755 | { | |
2756 | return (sop->so_owner.len == owner->len) && | |
2757 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2758 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2759 | } |
2760 | ||
fe0750e5 | 2761 | static struct nfs4_openowner * |
9b531137 SK |
2762 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2763 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2764 | { |
a50d2ad1 BF |
2765 | struct nfs4_stateowner *so; |
2766 | struct nfs4_openowner *oo; | |
d15c077e | 2767 | struct nfs4_client *clp; |
1da177e4 | 2768 | |
9b531137 | 2769 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2770 | if (!so->so_is_open_owner) |
2771 | continue; | |
a50d2ad1 BF |
2772 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2773 | oo = openowner(so); | |
d15c077e BF |
2774 | clp = oo->oo_owner.so_client; |
2775 | if ((bool)clp->cl_minorversion != sessions) | |
2776 | return NULL; | |
a50d2ad1 BF |
2777 | renew_client(oo->oo_owner.so_client); |
2778 | return oo; | |
2779 | } | |
1da177e4 LT |
2780 | } |
2781 | return NULL; | |
2782 | } | |
2783 | ||
2784 | /* search file_hashtbl[] for file */ | |
2785 | static struct nfs4_file * | |
2786 | find_file(struct inode *ino) | |
2787 | { | |
2788 | unsigned int hashval = file_hashval(ino); | |
2789 | struct nfs4_file *fp; | |
2790 | ||
cdc97505 | 2791 | spin_lock(&state_lock); |
89876f8c | 2792 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2793 | if (fp->fi_inode == ino) { |
2794 | get_nfs4_file(fp); | |
cdc97505 | 2795 | spin_unlock(&state_lock); |
1da177e4 | 2796 | return fp; |
13cd2184 | 2797 | } |
1da177e4 | 2798 | } |
cdc97505 | 2799 | spin_unlock(&state_lock); |
1da177e4 LT |
2800 | return NULL; |
2801 | } | |
2802 | ||
1da177e4 LT |
2803 | /* |
2804 | * Called to check deny when READ with all zero stateid or | |
2805 | * WRITE with all zero or all one stateid | |
2806 | */ | |
b37ad28b | 2807 | static __be32 |
1da177e4 LT |
2808 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2809 | { | |
2810 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2811 | struct nfs4_file *fp; | |
dcef0413 | 2812 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2813 | __be32 ret; |
1da177e4 | 2814 | |
1da177e4 | 2815 | fp = find_file(ino); |
13cd2184 N |
2816 | if (!fp) |
2817 | return nfs_ok; | |
b700949b | 2818 | ret = nfserr_locked; |
1da177e4 | 2819 | /* Search for conflicting share reservations */ |
13cd2184 | 2820 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2821 | if (test_deny(deny_type, stp) || |
2822 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2823 | goto out; |
1da177e4 | 2824 | } |
13cd2184 N |
2825 | ret = nfs_ok; |
2826 | out: | |
2827 | put_nfs4_file(fp); | |
2828 | return ret; | |
1da177e4 LT |
2829 | } |
2830 | ||
6b57d9c8 | 2831 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2832 | { |
e8c69d17 BF |
2833 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2834 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2835 | ||
cdc97505 | 2836 | lockdep_assert_held(&state_lock); |
1da177e4 LT |
2837 | /* We're assuming the state code never drops its reference |
2838 | * without first removing the lease. Since we're in this lease | |
2839 | * callback (and since the lease code is serialized by the kernel | |
2840 | * lock) we know the server hasn't removed the lease yet, we know | |
2841 | * it's safe to take a reference: */ | |
2842 | atomic_inc(&dp->dl_count); | |
2843 | ||
e8c69d17 | 2844 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2845 | |
1c8c601a | 2846 | /* Only place dl_time is set; protected by i_lock: */ |
1da177e4 LT |
2847 | dp->dl_time = get_seconds(); |
2848 | ||
6282cd56 N |
2849 | block_delegations(&dp->dl_fh); |
2850 | ||
6b57d9c8 BF |
2851 | nfsd4_cb_recall(dp); |
2852 | } | |
2853 | ||
1c8c601a | 2854 | /* Called from break_lease() with i_lock held. */ |
6b57d9c8 BF |
2855 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2856 | { | |
acfdf5c3 BF |
2857 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2858 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2859 | |
7fa10cd1 BF |
2860 | if (!fp) { |
2861 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2862 | return; | |
2863 | } | |
2864 | if (fp->fi_had_conflict) { | |
2865 | WARN(1, "duplicate break on %p\n", fp); | |
2866 | return; | |
2867 | } | |
0272e1fd BF |
2868 | /* |
2869 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2870 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2871 | * in time: |
0272e1fd BF |
2872 | */ |
2873 | fl->fl_break_time = 0; | |
1da177e4 | 2874 | |
cdc97505 | 2875 | spin_lock(&state_lock); |
acfdf5c3 BF |
2876 | fp->fi_had_conflict = true; |
2877 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2878 | nfsd_break_one_deleg(dp); | |
cdc97505 | 2879 | spin_unlock(&state_lock); |
1da177e4 LT |
2880 | } |
2881 | ||
1da177e4 LT |
2882 | static |
2883 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2884 | { | |
2885 | if (arg & F_UNLCK) | |
2886 | return lease_modify(onlist, arg); | |
2887 | else | |
2888 | return -EAGAIN; | |
2889 | } | |
2890 | ||
7b021967 | 2891 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2892 | .lm_break = nfsd_break_deleg_cb, |
2893 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2894 | }; |
2895 | ||
7a8711c9 BF |
2896 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2897 | { | |
2898 | if (nfsd4_has_session(cstate)) | |
2899 | return nfs_ok; | |
2900 | if (seqid == so->so_seqid - 1) | |
2901 | return nfserr_replay_me; | |
2902 | if (seqid == so->so_seqid) | |
2903 | return nfs_ok; | |
2904 | return nfserr_bad_seqid; | |
2905 | } | |
1da177e4 | 2906 | |
b37ad28b | 2907 | __be32 |
6668958f | 2908 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2909 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2910 | { |
1da177e4 LT |
2911 | clientid_t *clientid = &open->op_clientid; |
2912 | struct nfs4_client *clp = NULL; | |
2913 | unsigned int strhashval; | |
fe0750e5 | 2914 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2915 | __be32 status; |
1da177e4 | 2916 | |
2c142baa | 2917 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2918 | return nfserr_stale_clientid; |
32513b40 BF |
2919 | /* |
2920 | * In case we need it later, after we've already created the | |
2921 | * file and don't want to risk a further failure: | |
2922 | */ | |
2923 | open->op_file = nfsd4_alloc_file(); | |
2924 | if (open->op_file == NULL) | |
2925 | return nfserr_jukebox; | |
1da177e4 | 2926 | |
16bfdaaf | 2927 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2928 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2929 | open->op_openowner = oo; |
2930 | if (!oo) { | |
8daae4dc SK |
2931 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2932 | nn); | |
1da177e4 | 2933 | if (clp == NULL) |
0f442aa2 | 2934 | return nfserr_expired; |
bcf130f9 | 2935 | goto new_owner; |
1da177e4 | 2936 | } |
dad1c067 | 2937 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2938 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2939 | clp = oo->oo_owner.so_client; |
2940 | release_openowner(oo); | |
2941 | open->op_openowner = NULL; | |
bcf130f9 | 2942 | goto new_owner; |
0f442aa2 | 2943 | } |
4cdc951b BF |
2944 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2945 | if (status) | |
2946 | return status; | |
2947 | clp = oo->oo_owner.so_client; | |
2948 | goto alloc_stateid; | |
bcf130f9 BF |
2949 | new_owner: |
2950 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2951 | if (oo == NULL) | |
2952 | return nfserr_jukebox; | |
2953 | open->op_openowner = oo; | |
4cdc951b BF |
2954 | alloc_stateid: |
2955 | open->op_stp = nfs4_alloc_stateid(clp); | |
2956 | if (!open->op_stp) | |
2957 | return nfserr_jukebox; | |
0f442aa2 | 2958 | return nfs_ok; |
1da177e4 LT |
2959 | } |
2960 | ||
b37ad28b | 2961 | static inline __be32 |
4a6e43e6 N |
2962 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2963 | { | |
2964 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2965 | return nfserr_openmode; | |
2966 | else | |
2967 | return nfs_ok; | |
2968 | } | |
2969 | ||
f459e453 | 2970 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2971 | { |
f459e453 | 2972 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2973 | } |
2974 | ||
38c2f4b1 | 2975 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2976 | { |
f459e453 | 2977 | struct nfs4_stid *ret; |
24a0111e | 2978 | |
38c2f4b1 | 2979 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2980 | if (!ret) |
2981 | return NULL; | |
2982 | return delegstateid(ret); | |
24a0111e BF |
2983 | } |
2984 | ||
8b289b2c BF |
2985 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2986 | { | |
2987 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2988 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2989 | } | |
2990 | ||
b37ad28b | 2991 | static __be32 |
41d22663 | 2992 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2993 | struct nfs4_delegation **dp) |
2994 | { | |
2995 | int flags; | |
b37ad28b | 2996 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2997 | |
38c2f4b1 | 2998 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2999 | if (*dp == NULL) |
c44c5eeb | 3000 | goto out; |
24a0111e | 3001 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
3002 | status = nfs4_check_delegmode(*dp, flags); |
3003 | if (status) | |
3004 | *dp = NULL; | |
c44c5eeb | 3005 | out: |
8b289b2c | 3006 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
3007 | return nfs_ok; |
3008 | if (status) | |
3009 | return status; | |
dad1c067 | 3010 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 3011 | return nfs_ok; |
567d9829 N |
3012 | } |
3013 | ||
b37ad28b | 3014 | static __be32 |
dcef0413 | 3015 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 3016 | { |
dcef0413 | 3017 | struct nfs4_ol_stateid *local; |
fe0750e5 | 3018 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 3019 | |
8beefa24 | 3020 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
3021 | /* ignore lock owners */ |
3022 | if (local->st_stateowner->so_is_open_owner == 0) | |
3023 | continue; | |
3024 | /* remember if we have seen this open owner */ | |
fe0750e5 | 3025 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
3026 | *stpp = local; |
3027 | /* check for conflicting share reservations */ | |
3028 | if (!test_share(local, open)) | |
77eaae8d | 3029 | return nfserr_share_denied; |
1da177e4 | 3030 | } |
77eaae8d | 3031 | return nfs_ok; |
1da177e4 LT |
3032 | } |
3033 | ||
21fb4016 BF |
3034 | static inline int nfs4_access_to_access(u32 nfs4_access) |
3035 | { | |
3036 | int flags = 0; | |
3037 | ||
3038 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
3039 | flags |= NFSD_MAY_READ; | |
3040 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
3041 | flags |= NFSD_MAY_WRITE; | |
3042 | return flags; | |
3043 | } | |
3044 | ||
0c12eaff CB |
3045 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
3046 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
3047 | { |
3048 | __be32 status; | |
0c12eaff CB |
3049 | int oflag = nfs4_access_to_omode(open->op_share_access); |
3050 | int access = nfs4_access_to_access(open->op_share_access); | |
3051 | ||
f9d7562f BF |
3052 | if (!fp->fi_fds[oflag]) { |
3053 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
3054 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
3055 | if (status) |
3056 | return status; | |
3057 | } | |
3058 | nfs4_file_get_access(fp, oflag); | |
3059 | ||
3060 | return nfs_ok; | |
3061 | } | |
3062 | ||
b37ad28b | 3063 | static inline __be32 |
1da177e4 LT |
3064 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
3065 | struct nfsd4_open *open) | |
3066 | { | |
3067 | struct iattr iattr = { | |
3068 | .ia_valid = ATTR_SIZE, | |
3069 | .ia_size = 0, | |
3070 | }; | |
3071 | if (!open->op_truncate) | |
3072 | return 0; | |
3073 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 3074 | return nfserr_inval; |
1da177e4 LT |
3075 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
3076 | } | |
3077 | ||
b37ad28b | 3078 | static __be32 |
dcef0413 | 3079 | 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 | 3080 | { |
b6d2f1ca | 3081 | u32 op_share_access = open->op_share_access; |
7d947842 | 3082 | bool new_access; |
b37ad28b | 3083 | __be32 status; |
1da177e4 | 3084 | |
82c5ff1b | 3085 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 3086 | if (new_access) { |
0c12eaff | 3087 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
3088 | if (status) |
3089 | return status; | |
6c26d08f | 3090 | } |
1da177e4 LT |
3091 | status = nfsd4_truncate(rqstp, cur_fh, open); |
3092 | if (status) { | |
f9d7562f | 3093 | if (new_access) { |
f197c271 | 3094 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
3095 | nfs4_file_put_access(fp, oflag); |
3096 | } | |
1da177e4 LT |
3097 | return status; |
3098 | } | |
3099 | /* remember the open */ | |
82c5ff1b | 3100 | set_access(op_share_access, stp); |
ce0fc43c | 3101 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
3102 | |
3103 | return nfs_ok; | |
3104 | } | |
3105 | ||
3106 | ||
1da177e4 | 3107 | static void |
1255a8f3 | 3108 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 3109 | { |
dad1c067 | 3110 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
3111 | } |
3112 | ||
14a24e99 BF |
3113 | /* Should we give out recallable state?: */ |
3114 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
3115 | { | |
3116 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
3117 | return true; | |
3118 | /* | |
3119 | * In the sessions case, since we don't have to establish a | |
3120 | * separate connection for callbacks, we assume it's OK | |
3121 | * until we hear otherwise: | |
3122 | */ | |
3123 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
3124 | } | |
3125 | ||
22d38c4c BF |
3126 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3127 | { | |
3128 | struct file_lock *fl; | |
3129 | ||
3130 | fl = locks_alloc_lock(); | |
3131 | if (!fl) | |
3132 | return NULL; | |
3133 | locks_init_lock(fl); | |
3134 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
617588d5 | 3135 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
3136 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
3137 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3138 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3139 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3140 | return fl; |
3141 | } | |
3142 | ||
99c41515 | 3143 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3144 | { |
acfdf5c3 | 3145 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3146 | struct file_lock *fl; |
3147 | int status; | |
3148 | ||
99c41515 | 3149 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3150 | if (!fl) |
3151 | return -ENOMEM; | |
acfdf5c3 | 3152 | fl->fl_file = find_readable_file(fp); |
acfdf5c3 | 3153 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
e873088f BF |
3154 | if (status) |
3155 | goto out_free; | |
acfdf5c3 | 3156 | fp->fi_lease = fl; |
cb0942b8 | 3157 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 | 3158 | atomic_set(&fp->fi_delegees, 1); |
cdc97505 | 3159 | spin_lock(&state_lock); |
931ee56c | 3160 | hash_delegation_locked(dp, fp); |
cdc97505 | 3161 | spin_unlock(&state_lock); |
acfdf5c3 | 3162 | return 0; |
e873088f BF |
3163 | out_free: |
3164 | locks_free_lock(fl); | |
3165 | return status; | |
acfdf5c3 BF |
3166 | } |
3167 | ||
bf7bd3e9 | 3168 | static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) |
acfdf5c3 | 3169 | { |
bf7bd3e9 BF |
3170 | if (fp->fi_had_conflict) |
3171 | return -EAGAIN; | |
3172 | get_nfs4_file(fp); | |
3173 | dp->dl_file = fp; | |
cbf7a75b BF |
3174 | if (!fp->fi_lease) |
3175 | return nfs4_setlease(dp); | |
cdc97505 | 3176 | spin_lock(&state_lock); |
cbf7a75b | 3177 | atomic_inc(&fp->fi_delegees); |
acfdf5c3 | 3178 | if (fp->fi_had_conflict) { |
cdc97505 | 3179 | spin_unlock(&state_lock); |
cbf7a75b | 3180 | return -EAGAIN; |
acfdf5c3 | 3181 | } |
931ee56c | 3182 | hash_delegation_locked(dp, fp); |
cdc97505 | 3183 | spin_unlock(&state_lock); |
edab9782 BF |
3184 | return 0; |
3185 | } | |
3186 | ||
4aa8913c BH |
3187 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3188 | { | |
3189 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3190 | if (status == -EAGAIN) | |
3191 | open->op_why_no_deleg = WND4_CONTENTION; | |
3192 | else { | |
3193 | open->op_why_no_deleg = WND4_RESOURCE; | |
3194 | switch (open->op_deleg_want) { | |
3195 | case NFS4_SHARE_WANT_READ_DELEG: | |
3196 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3197 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3198 | break; | |
3199 | case NFS4_SHARE_WANT_CANCEL: | |
3200 | open->op_why_no_deleg = WND4_CANCELLED; | |
3201 | break; | |
3202 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3203 | WARN_ON_ONCE(1); |
4aa8913c BH |
3204 | } |
3205 | } | |
3206 | } | |
3207 | ||
1da177e4 LT |
3208 | /* |
3209 | * Attempt to hand out a delegation. | |
99c41515 BF |
3210 | * |
3211 | * Note we don't support write delegations, and won't until the vfs has | |
3212 | * proper support for them. | |
1da177e4 LT |
3213 | */ |
3214 | static void | |
5ccb0066 SK |
3215 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3216 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3217 | { |
3218 | struct nfs4_delegation *dp; | |
fe0750e5 | 3219 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3220 | int cb_up; |
99c41515 | 3221 | int status = 0; |
1da177e4 | 3222 | |
fe0750e5 | 3223 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3224 | open->op_recall = 0; |
3225 | switch (open->op_claim_type) { | |
3226 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3227 | if (!cb_up) |
7b190fec | 3228 | open->op_recall = 1; |
99c41515 BF |
3229 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3230 | goto out_no_deleg; | |
7b190fec N |
3231 | break; |
3232 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 3233 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
3234 | /* |
3235 | * Let's not give out any delegations till everyone's | |
3236 | * had the chance to reclaim theirs.... | |
3237 | */ | |
5ccb0066 | 3238 | if (locks_in_grace(net)) |
99c41515 | 3239 | goto out_no_deleg; |
dad1c067 | 3240 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3241 | goto out_no_deleg; |
9a0590ae SD |
3242 | /* |
3243 | * Also, if the file was opened for write or | |
3244 | * create, there's a good chance the client's | |
3245 | * about to write to it, resulting in an | |
3246 | * immediate recall (since we don't support | |
3247 | * write delegations): | |
3248 | */ | |
7b190fec | 3249 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3250 | goto out_no_deleg; |
3251 | if (open->op_create == NFS4_OPEN_CREATE) | |
3252 | goto out_no_deleg; | |
7b190fec N |
3253 | break; |
3254 | default: | |
99c41515 | 3255 | goto out_no_deleg; |
7b190fec | 3256 | } |
99c41515 | 3257 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3258 | if (dp == NULL) |
3259 | goto out_no_deleg; | |
bf7bd3e9 | 3260 | status = nfs4_set_delegation(dp, stp->st_file); |
edab9782 | 3261 | if (status) |
dd239cc0 | 3262 | goto out_free; |
1da177e4 | 3263 | |
d5477a8d | 3264 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3265 | |
8c10cbdb | 3266 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3267 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3268 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3269 | return; |
3270 | out_free: | |
cbf7a75b | 3271 | destroy_delegation(dp); |
dd239cc0 | 3272 | out_no_deleg: |
99c41515 BF |
3273 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3274 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 3275 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 3276 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
3277 | open->op_recall = 1; |
3278 | } | |
99c41515 BF |
3279 | |
3280 | /* 4.1 client asking for a delegation? */ | |
3281 | if (open->op_deleg_want) | |
3282 | nfsd4_open_deleg_none_ext(open, status); | |
3283 | return; | |
1da177e4 LT |
3284 | } |
3285 | ||
e27f49c3 BH |
3286 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3287 | struct nfs4_delegation *dp) | |
3288 | { | |
3289 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3290 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3291 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3292 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3293 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3294 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3295 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3296 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3297 | } | |
3298 | /* Otherwise the client must be confused wanting a delegation | |
3299 | * it already has, therefore we don't return | |
3300 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3301 | */ | |
3302 | } | |
3303 | ||
1da177e4 LT |
3304 | /* |
3305 | * called with nfs4_lock_state() held. | |
3306 | */ | |
b37ad28b | 3307 | __be32 |
1da177e4 LT |
3308 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3309 | { | |
6668958f | 3310 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3311 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3312 | struct nfs4_file *fp = NULL; |
3313 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3314 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3315 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3316 | __be32 status; |
1da177e4 | 3317 | |
1da177e4 LT |
3318 | /* |
3319 | * Lookup file; if found, lookup stateid and check open request, | |
3320 | * and check for delegations in the process of being recalled. | |
3321 | * If not found, create the nfs4_file struct | |
3322 | */ | |
3323 | fp = find_file(ino); | |
3324 | if (fp) { | |
3325 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3326 | goto out; | |
41d22663 | 3327 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3328 | if (status) |
3329 | goto out; | |
1da177e4 | 3330 | } else { |
c44c5eeb | 3331 | status = nfserr_bad_stateid; |
8b289b2c | 3332 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3333 | goto out; |
3e772463 | 3334 | status = nfserr_jukebox; |
32513b40 BF |
3335 | fp = open->op_file; |
3336 | open->op_file = NULL; | |
3337 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3338 | } |
3339 | ||
3340 | /* | |
3341 | * OPEN the file, or upgrade an existing OPEN. | |
3342 | * If truncate fails, the OPEN fails. | |
3343 | */ | |
3344 | if (stp) { | |
3345 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3346 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3347 | if (status) |
3348 | goto out; | |
3349 | } else { | |
4cdc951b | 3350 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3351 | if (status) |
3352 | goto out; | |
3353 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3354 | if (status) |
1da177e4 | 3355 | goto out; |
4cdc951b BF |
3356 | stp = open->op_stp; |
3357 | open->op_stp = NULL; | |
996e0938 | 3358 | init_open_stateid(stp, fp, open); |
1da177e4 | 3359 | } |
dcef0413 BF |
3360 | update_stateid(&stp->st_stid.sc_stateid); |
3361 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3362 | |
d24433cd | 3363 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3364 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3365 | |
d24433cd BH |
3366 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3367 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3368 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3369 | goto nodeleg; | |
3370 | } | |
3371 | } | |
3372 | ||
1da177e4 LT |
3373 | /* |
3374 | * Attempt to hand out a delegation. No error return, because the | |
3375 | * OPEN succeeds even if we fail. | |
3376 | */ | |
5ccb0066 | 3377 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3378 | nodeleg: |
1da177e4 LT |
3379 | status = nfs_ok; |
3380 | ||
8c10cbdb | 3381 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3382 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3383 | out: |
d24433cd BH |
3384 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3385 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3386 | open->op_deleg_want) |
3387 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3388 | |
13cd2184 N |
3389 | if (fp) |
3390 | put_nfs4_file(fp); | |
37515177 | 3391 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3392 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3393 | /* |
3394 | * To finish the open response, we just need to set the rflags. | |
3395 | */ | |
3396 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3397 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3398 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3399 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3400 | ||
3401 | return status; | |
3402 | } | |
3403 | ||
d29b20cd BF |
3404 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3405 | { | |
3406 | if (open->op_openowner) { | |
3407 | struct nfs4_openowner *oo = open->op_openowner; | |
3408 | ||
3409 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3410 | list_del_init(&oo->oo_close_lru); | |
3411 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3412 | if (status) { | |
3413 | release_openowner(oo); | |
3414 | open->op_openowner = NULL; | |
3415 | } else | |
3416 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3417 | } | |
3418 | } | |
32513b40 BF |
3419 | if (open->op_file) |
3420 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3421 | if (open->op_stp) |
ef79859e | 3422 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3423 | } |
3424 | ||
9b2ef62b BF |
3425 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3426 | { | |
3427 | struct nfs4_client *found; | |
3428 | ||
3429 | if (STALE_CLIENTID(clid, nn)) | |
3430 | return nfserr_stale_clientid; | |
3431 | found = find_confirmed_client(clid, session, nn); | |
3432 | if (clp) | |
3433 | *clp = found; | |
3434 | return found ? nfs_ok : nfserr_expired; | |
3435 | } | |
3436 | ||
b37ad28b | 3437 | __be32 |
b591480b BF |
3438 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3439 | clientid_t *clid) | |
1da177e4 LT |
3440 | { |
3441 | struct nfs4_client *clp; | |
b37ad28b | 3442 | __be32 status; |
7f2210fa | 3443 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3444 | |
3445 | nfs4_lock_state(); | |
3446 | dprintk("process_renew(%08x/%08x): starting\n", | |
3447 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3448 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3449 | if (status) | |
1da177e4 | 3450 | goto out; |
1da177e4 | 3451 | status = nfserr_cb_path_down; |
ea1da636 | 3452 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3453 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3454 | goto out; |
3455 | status = nfs_ok; | |
3456 | out: | |
3457 | nfs4_unlock_state(); | |
3458 | return status; | |
3459 | } | |
3460 | ||
a76b4319 | 3461 | static void |
12760c66 | 3462 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3463 | { |
33dcc481 | 3464 | /* do nothing if grace period already ended */ |
a51c84ed | 3465 | if (nn->grace_ended) |
33dcc481 JL |
3466 | return; |
3467 | ||
a76b4319 | 3468 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3469 | nn->grace_ended = true; |
12760c66 | 3470 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3471 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3472 | /* |
3473 | * Now that every NFSv4 client has had the chance to recover and | |
3474 | * to see the (possibly new, possibly shorter) lease time, we | |
3475 | * can safely set the next grace time to the current lease time: | |
3476 | */ | |
5284b44e | 3477 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3478 | } |
3479 | ||
fd39ca9a | 3480 | static time_t |
09121281 | 3481 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3482 | { |
3483 | struct nfs4_client *clp; | |
fe0750e5 | 3484 | struct nfs4_openowner *oo; |
1da177e4 LT |
3485 | struct nfs4_delegation *dp; |
3486 | struct list_head *pos, *next, reaplist; | |
3d733711 | 3487 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
a832e7ae | 3488 | time_t t, new_timeo = nn->nfsd4_lease; |
1da177e4 LT |
3489 | |
3490 | nfs4_lock_state(); | |
3491 | ||
3492 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3493 | nfsd4_end_grace(nn); |
36acb66b | 3494 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3495 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3496 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3497 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3498 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3499 | t = clp->cl_time - cutoff; | |
a832e7ae | 3500 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
3501 | break; |
3502 | } | |
221a6876 | 3503 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3504 | dprintk("NFSD: client in use (clientid %08x)\n", |
3505 | clp->cl_clientid.cl_id); | |
3506 | continue; | |
3507 | } | |
221a6876 | 3508 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3509 | } |
c9a49628 | 3510 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3511 | list_for_each_safe(pos, next, &reaplist) { |
3512 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3513 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3514 | clp->cl_clientid.cl_id); | |
3515 | expire_client(clp); | |
3516 | } | |
cdc97505 | 3517 | spin_lock(&state_lock); |
e8c69d17 | 3518 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3519 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3520 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3521 | continue; | |
1da177e4 | 3522 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
a832e7ae JL |
3523 | t = dp->dl_time - cutoff; |
3524 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3525 | break; |
3526 | } | |
1da177e4 LT |
3527 | list_move(&dp->dl_recall_lru, &reaplist); |
3528 | } | |
cdc97505 | 3529 | spin_unlock(&state_lock); |
1da177e4 LT |
3530 | list_for_each_safe(pos, next, &reaplist) { |
3531 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3532 | revoke_delegation(dp); |
1da177e4 | 3533 | } |
73758fed | 3534 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3535 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3536 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
a832e7ae JL |
3537 | t = oo->oo_time - cutoff; |
3538 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
3539 | break; |
3540 | } | |
fe0750e5 | 3541 | release_openowner(oo); |
1da177e4 | 3542 | } |
a832e7ae | 3543 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 | 3544 | nfs4_unlock_state(); |
a832e7ae | 3545 | return new_timeo; |
1da177e4 LT |
3546 | } |
3547 | ||
a254b246 HH |
3548 | static struct workqueue_struct *laundry_wq; |
3549 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3550 | |
3551 | static void | |
09121281 | 3552 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3553 | { |
3554 | time_t t; | |
09121281 SK |
3555 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3556 | work); | |
3557 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3558 | laundromat_work); | |
1da177e4 | 3559 | |
09121281 | 3560 | t = nfs4_laundromat(nn); |
1da177e4 | 3561 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3562 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3563 | } |
3564 | ||
f7a4d872 | 3565 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3566 | { |
f7a4d872 BF |
3567 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3568 | return nfserr_bad_stateid; | |
3569 | return nfs_ok; | |
1da177e4 LT |
3570 | } |
3571 | ||
1da177e4 | 3572 | static inline int |
82c5ff1b | 3573 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3574 | { |
82c5ff1b JL |
3575 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3576 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3577 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3578 | } |
3579 | ||
3580 | static inline int | |
82c5ff1b | 3581 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3582 | { |
82c5ff1b JL |
3583 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3584 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3585 | } |
3586 | ||
3587 | static | |
dcef0413 | 3588 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3589 | { |
b37ad28b | 3590 | __be32 status = nfserr_openmode; |
1da177e4 | 3591 | |
02921914 BF |
3592 | /* For lock stateid's, we test the parent open, not the lock: */ |
3593 | if (stp->st_openstp) | |
3594 | stp = stp->st_openstp; | |
82c5ff1b | 3595 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3596 | goto out; |
82c5ff1b | 3597 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3598 | goto out; |
3599 | status = nfs_ok; | |
3600 | out: | |
3601 | return status; | |
3602 | } | |
3603 | ||
b37ad28b | 3604 | static inline __be32 |
5ccb0066 | 3605 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3606 | { |
203a8c8e | 3607 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3608 | return nfs_ok; |
5ccb0066 | 3609 | else if (locks_in_grace(net)) { |
25985edc | 3610 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3611 | * conflicting state; so we must wait out the grace period. */ |
3612 | return nfserr_grace; | |
3613 | } else if (flags & WR_STATE) | |
3614 | return nfs4_share_conflict(current_fh, | |
3615 | NFS4_SHARE_DENY_WRITE); | |
3616 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3617 | return nfs4_share_conflict(current_fh, | |
3618 | NFS4_SHARE_DENY_READ); | |
3619 | } | |
3620 | ||
3621 | /* | |
3622 | * Allow READ/WRITE during grace period on recovered state only for files | |
3623 | * that are not able to provide mandatory locking. | |
3624 | */ | |
3625 | static inline int | |
5ccb0066 | 3626 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3627 | { |
5ccb0066 | 3628 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3629 | } |
3630 | ||
81b82965 BF |
3631 | /* Returns true iff a is later than b: */ |
3632 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3633 | { | |
1a9357f4 | 3634 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3635 | } |
3636 | ||
57b7b43b | 3637 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3638 | { |
6668958f AA |
3639 | /* |
3640 | * When sessions are used the stateid generation number is ignored | |
3641 | * when it is zero. | |
3642 | */ | |
28dde241 | 3643 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3644 | return nfs_ok; |
3645 | ||
3646 | if (in->si_generation == ref->si_generation) | |
3647 | return nfs_ok; | |
6668958f | 3648 | |
0836f587 | 3649 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3650 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3651 | return nfserr_bad_stateid; |
3652 | /* | |
81b82965 BF |
3653 | * However, we could see a stateid from the past, even from a |
3654 | * non-buggy client. For example, if the client sends a lock | |
3655 | * while some IO is outstanding, the lock may bump si_generation | |
3656 | * while the IO is still in flight. The client could avoid that | |
3657 | * situation by waiting for responses on all the IO requests, | |
3658 | * but better performance may result in retrying IO that | |
3659 | * receives an old_stateid error if requests are rarely | |
3660 | * reordered in flight: | |
0836f587 | 3661 | */ |
81b82965 | 3662 | return nfserr_old_stateid; |
0836f587 BF |
3663 | } |
3664 | ||
7df302f7 | 3665 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3666 | { |
97b7e3b6 BF |
3667 | struct nfs4_stid *s; |
3668 | struct nfs4_ol_stateid *ols; | |
3669 | __be32 status; | |
17456804 | 3670 | |
7df302f7 CL |
3671 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3672 | return nfserr_bad_stateid; | |
3673 | /* Client debugging aid. */ | |
3674 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3675 | char addr_str[INET6_ADDRSTRLEN]; | |
3676 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3677 | sizeof(addr_str)); | |
3678 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3679 | "with incorrect client ID\n", addr_str); | |
3680 | return nfserr_bad_stateid; | |
3681 | } | |
38c2f4b1 | 3682 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3683 | if (!s) |
7df302f7 | 3684 | return nfserr_bad_stateid; |
36279ac1 | 3685 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3686 | if (status) |
97b7e3b6 | 3687 | return status; |
23340032 BF |
3688 | switch (s->sc_type) { |
3689 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3690 | return nfs_ok; |
3bd64a5b BF |
3691 | case NFS4_REVOKED_DELEG_STID: |
3692 | return nfserr_deleg_revoked; | |
23340032 BF |
3693 | case NFS4_OPEN_STID: |
3694 | case NFS4_LOCK_STID: | |
3695 | ols = openlockstateid(s); | |
3696 | if (ols->st_stateowner->so_is_open_owner | |
3697 | && !(openowner(ols->st_stateowner)->oo_flags | |
3698 | & NFS4_OO_CONFIRMED)) | |
3699 | return nfserr_bad_stateid; | |
97b7e3b6 | 3700 | return nfs_ok; |
23340032 BF |
3701 | default: |
3702 | printk("unknown stateid type %x\n", s->sc_type); | |
3703 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3704 | return nfserr_bad_stateid; |
23340032 | 3705 | } |
17456804 BS |
3706 | } |
3707 | ||
3320fef1 SK |
3708 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3709 | struct nfs4_stid **s, bool sessions, | |
3710 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3711 | { |
3712 | struct nfs4_client *cl; | |
0eb6f20a | 3713 | __be32 status; |
38c2f4b1 BF |
3714 | |
3715 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3716 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3717 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3718 | nn, &cl); | |
a8a7c677 TM |
3719 | if (status == nfserr_stale_clientid) { |
3720 | if (sessions) | |
3721 | return nfserr_bad_stateid; | |
38c2f4b1 | 3722 | return nfserr_stale_stateid; |
a8a7c677 | 3723 | } |
0eb6f20a BF |
3724 | if (status) |
3725 | return status; | |
38c2f4b1 BF |
3726 | *s = find_stateid_by_type(cl, stateid, typemask); |
3727 | if (!*s) | |
3728 | return nfserr_bad_stateid; | |
3729 | return nfs_ok; | |
38c2f4b1 BF |
3730 | } |
3731 | ||
1da177e4 LT |
3732 | /* |
3733 | * Checks for stateid operations | |
3734 | */ | |
b37ad28b | 3735 | __be32 |
5ccb0066 | 3736 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3737 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3738 | { |
69064a27 | 3739 | struct nfs4_stid *s; |
dcef0413 | 3740 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3741 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3742 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3743 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3744 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
14bcab1a | 3745 | struct file *file = NULL; |
b37ad28b | 3746 | __be32 status; |
1da177e4 | 3747 | |
1da177e4 LT |
3748 | if (filpp) |
3749 | *filpp = NULL; | |
3750 | ||
5ccb0066 | 3751 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3752 | return nfserr_grace; |
3753 | ||
3754 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3755 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3756 | |
14bcab1a TM |
3757 | nfs4_lock_state(); |
3758 | ||
3320fef1 SK |
3759 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3760 | &s, cstate->minorversion, nn); | |
38c2f4b1 | 3761 | if (status) |
14bcab1a | 3762 | goto out; |
69064a27 BF |
3763 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3764 | if (status) | |
3765 | goto out; | |
f7a4d872 BF |
3766 | switch (s->sc_type) { |
3767 | case NFS4_DELEG_STID: | |
69064a27 | 3768 | dp = delegstateid(s); |
dc9bf700 BF |
3769 | status = nfs4_check_delegmode(dp, flags); |
3770 | if (status) | |
3771 | goto out; | |
43b0178e | 3772 | if (filpp) { |
14bcab1a TM |
3773 | file = dp->dl_file->fi_deleg_file; |
3774 | if (!file) { | |
063b0fb9 BF |
3775 | WARN_ON_ONCE(1); |
3776 | status = nfserr_serverfault; | |
3777 | goto out; | |
3778 | } | |
43b0178e | 3779 | } |
f7a4d872 BF |
3780 | break; |
3781 | case NFS4_OPEN_STID: | |
3782 | case NFS4_LOCK_STID: | |
69064a27 | 3783 | stp = openlockstateid(s); |
f7a4d872 BF |
3784 | status = nfs4_check_fh(current_fh, stp); |
3785 | if (status) | |
1da177e4 | 3786 | goto out; |
fe0750e5 | 3787 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3788 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3789 | goto out; |
a4455be0 BF |
3790 | status = nfs4_check_openmode(stp, flags); |
3791 | if (status) | |
1da177e4 | 3792 | goto out; |
f9d7562f BF |
3793 | if (filpp) { |
3794 | if (flags & RD_STATE) | |
14bcab1a | 3795 | file = find_readable_file(stp->st_file); |
f9d7562f | 3796 | else |
14bcab1a | 3797 | file = find_writeable_file(stp->st_file); |
f9d7562f | 3798 | } |
f7a4d872 BF |
3799 | break; |
3800 | default: | |
14bcab1a TM |
3801 | status = nfserr_bad_stateid; |
3802 | goto out; | |
1da177e4 LT |
3803 | } |
3804 | status = nfs_ok; | |
14bcab1a TM |
3805 | if (file) |
3806 | *filpp = get_file(file); | |
1da177e4 | 3807 | out: |
14bcab1a | 3808 | nfs4_unlock_state(); |
1da177e4 LT |
3809 | return status; |
3810 | } | |
3811 | ||
e1ca12df | 3812 | static __be32 |
dcef0413 | 3813 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3814 | { |
a1b8ff4c BF |
3815 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
3816 | ||
3817 | if (check_for_locks(stp->st_file, lo)) | |
e1ca12df | 3818 | return nfserr_locks_held; |
a1b8ff4c BF |
3819 | /* |
3820 | * Currently there's a 1-1 lock stateid<->lockowner | |
3821 | * correspondance, and we have to delete the lockowner when we | |
3822 | * delete the lock stateid: | |
3823 | */ | |
48385408 | 3824 | release_lockowner(lo); |
e1ca12df BS |
3825 | return nfs_ok; |
3826 | } | |
3827 | ||
17456804 BS |
3828 | /* |
3829 | * Test if the stateid is valid | |
3830 | */ | |
3831 | __be32 | |
3832 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3833 | struct nfsd4_test_stateid *test_stateid) | |
3834 | { | |
03cfb420 BS |
3835 | struct nfsd4_test_stateid_id *stateid; |
3836 | struct nfs4_client *cl = cstate->session->se_client; | |
3837 | ||
3838 | nfs4_lock_state(); | |
3839 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3840 | stateid->ts_id_status = |
3841 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3842 | nfs4_unlock_state(); |
3843 | ||
17456804 BS |
3844 | return nfs_ok; |
3845 | } | |
3846 | ||
e1ca12df BS |
3847 | __be32 |
3848 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3849 | struct nfsd4_free_stateid *free_stateid) | |
3850 | { | |
3851 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3852 | struct nfs4_stid *s; |
3bd64a5b | 3853 | struct nfs4_delegation *dp; |
38c2f4b1 | 3854 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3855 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3856 | |
3857 | nfs4_lock_state(); | |
38c2f4b1 | 3858 | s = find_stateid(cl, stateid); |
2da1cec7 | 3859 | if (!s) |
81b82965 | 3860 | goto out; |
2da1cec7 BF |
3861 | switch (s->sc_type) { |
3862 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3863 | ret = nfserr_locks_held; |
3864 | goto out; | |
2da1cec7 BF |
3865 | case NFS4_OPEN_STID: |
3866 | case NFS4_LOCK_STID: | |
3867 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3868 | if (ret) | |
3869 | goto out; | |
3870 | if (s->sc_type == NFS4_LOCK_STID) | |
3871 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3872 | else | |
3873 | ret = nfserr_locks_held; | |
f7a4d872 | 3874 | break; |
3bd64a5b BF |
3875 | case NFS4_REVOKED_DELEG_STID: |
3876 | dp = delegstateid(s); | |
3877 | destroy_revoked_delegation(dp); | |
3878 | ret = nfs_ok; | |
3879 | break; | |
f7a4d872 BF |
3880 | default: |
3881 | ret = nfserr_bad_stateid; | |
e1ca12df | 3882 | } |
e1ca12df BS |
3883 | out: |
3884 | nfs4_unlock_state(); | |
3885 | return ret; | |
3886 | } | |
3887 | ||
4c4cd222 N |
3888 | static inline int |
3889 | setlkflg (int type) | |
3890 | { | |
3891 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3892 | RD_STATE : WR_STATE; | |
3893 | } | |
1da177e4 | 3894 | |
dcef0413 | 3895 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3896 | { |
3897 | struct svc_fh *current_fh = &cstate->current_fh; | |
3898 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3899 | __be32 status; | |
3900 | ||
c0a5d93e BF |
3901 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3902 | if (status) | |
3903 | return status; | |
3bd64a5b BF |
3904 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3905 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3906 | /* |
3907 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3908 | * nfserr_replay_me from the previous step, and |
3909 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3910 | */ |
3911 | return nfserr_bad_stateid; | |
3912 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3913 | if (status) | |
3914 | return status; | |
3915 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3916 | } |
3917 | ||
1da177e4 LT |
3918 | /* |
3919 | * Checks for sequence id mutating operations. | |
3920 | */ | |
b37ad28b | 3921 | static __be32 |
dd453dfd | 3922 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3923 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3924 | struct nfs4_ol_stateid **stpp, |
3925 | struct nfsd_net *nn) | |
1da177e4 | 3926 | { |
0836f587 | 3927 | __be32 status; |
38c2f4b1 | 3928 | struct nfs4_stid *s; |
1da177e4 | 3929 | |
8c10cbdb BH |
3930 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3931 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3932 | |
1da177e4 | 3933 | *stpp = NULL; |
3320fef1 SK |
3934 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3935 | cstate->minorversion, nn); | |
c0a5d93e BF |
3936 | if (status) |
3937 | return status; | |
38c2f4b1 | 3938 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3939 | if (!nfsd4_has_session(cstate)) |
3940 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3941 | |
c0a5d93e BF |
3942 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3943 | } | |
39325bd0 | 3944 | |
3320fef1 SK |
3945 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3946 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3947 | { |
3948 | __be32 status; | |
3949 | struct nfs4_openowner *oo; | |
1da177e4 | 3950 | |
c0a5d93e | 3951 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3952 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3953 | if (status) |
3954 | return status; | |
c0a5d93e | 3955 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3956 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3957 | return nfserr_bad_stateid; |
3a4f98bb | 3958 | return nfs_ok; |
1da177e4 LT |
3959 | } |
3960 | ||
b37ad28b | 3961 | __be32 |
ca364317 | 3962 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3963 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3964 | { |
b37ad28b | 3965 | __be32 status; |
fe0750e5 | 3966 | struct nfs4_openowner *oo; |
dcef0413 | 3967 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3968 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3969 | |
a6a9f18f AV |
3970 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
3971 | cstate->current_fh.fh_dentry); | |
1da177e4 | 3972 | |
ca364317 | 3973 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3974 | if (status) |
3975 | return status; | |
1da177e4 LT |
3976 | |
3977 | nfs4_lock_state(); | |
3978 | ||
9072d5c6 | 3979 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3980 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3981 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3982 | if (status) |
68b66e82 | 3983 | goto out; |
fe0750e5 | 3984 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3985 | status = nfserr_bad_stateid; |
dad1c067 | 3986 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3987 | goto out; |
dad1c067 | 3988 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3989 | update_stateid(&stp->st_stid.sc_stateid); |
3990 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3991 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3992 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3993 | |
2a4317c5 | 3994 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3995 | status = nfs_ok; |
1da177e4 | 3996 | out: |
9411b1d4 | 3997 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3998 | if (!cstate->replay_owner) |
3999 | nfs4_unlock_state(); | |
1da177e4 LT |
4000 | return status; |
4001 | } | |
4002 | ||
6409a5a6 | 4003 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 4004 | { |
82c5ff1b | 4005 | if (!test_access(access, stp)) |
6409a5a6 BF |
4006 | return; |
4007 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 4008 | clear_access(access, stp); |
6409a5a6 | 4009 | } |
f197c271 | 4010 | |
6409a5a6 BF |
4011 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
4012 | { | |
4013 | switch (to_access) { | |
4014 | case NFS4_SHARE_ACCESS_READ: | |
4015 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
4016 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4017 | break; | |
4018 | case NFS4_SHARE_ACCESS_WRITE: | |
4019 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
4020 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
4021 | break; | |
4022 | case NFS4_SHARE_ACCESS_BOTH: | |
4023 | break; | |
4024 | default: | |
063b0fb9 | 4025 | WARN_ON_ONCE(1); |
1da177e4 LT |
4026 | } |
4027 | } | |
4028 | ||
4029 | static void | |
ce0fc43c | 4030 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
4031 | { |
4032 | int i; | |
4033 | for (i = 0; i < 4; i++) { | |
4034 | if ((i & deny) != i) | |
ce0fc43c | 4035 | clear_deny(i, stp); |
1da177e4 LT |
4036 | } |
4037 | } | |
4038 | ||
b37ad28b | 4039 | __be32 |
ca364317 BF |
4040 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
4041 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 4042 | struct nfsd4_open_downgrade *od) |
1da177e4 | 4043 | { |
b37ad28b | 4044 | __be32 status; |
dcef0413 | 4045 | struct nfs4_ol_stateid *stp; |
3320fef1 | 4046 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4047 | |
a6a9f18f AV |
4048 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
4049 | cstate->current_fh.fh_dentry); | |
1da177e4 | 4050 | |
c30e92df | 4051 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
4052 | if (od->od_deleg_want) |
4053 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
4054 | od->od_deleg_want); | |
1da177e4 LT |
4055 | |
4056 | nfs4_lock_state(); | |
c0a5d93e | 4057 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 4058 | &od->od_stateid, &stp, nn); |
9072d5c6 | 4059 | if (status) |
1da177e4 | 4060 | goto out; |
1da177e4 | 4061 | status = nfserr_inval; |
82c5ff1b JL |
4062 | if (!test_access(od->od_share_access, stp)) { |
4063 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
4064 | stp->st_access_bmap, od->od_share_access); |
4065 | goto out; | |
4066 | } | |
ce0fc43c | 4067 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
4068 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
4069 | stp->st_deny_bmap, od->od_share_deny); | |
4070 | goto out; | |
4071 | } | |
6409a5a6 | 4072 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 4073 | |
ce0fc43c | 4074 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 4075 | |
dcef0413 BF |
4076 | update_stateid(&stp->st_stid.sc_stateid); |
4077 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4078 | status = nfs_ok; |
4079 | out: | |
9411b1d4 | 4080 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4081 | if (!cstate->replay_owner) |
4082 | nfs4_unlock_state(); | |
1da177e4 LT |
4083 | return status; |
4084 | } | |
4085 | ||
f7a4d872 BF |
4086 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
4087 | { | |
4088 | unhash_open_stateid(s); | |
4089 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
4090 | } |
4091 | ||
1da177e4 LT |
4092 | /* |
4093 | * nfs4_unlock_state() called after encode | |
4094 | */ | |
b37ad28b | 4095 | __be32 |
ca364317 | 4096 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4097 | struct nfsd4_close *close) |
1da177e4 | 4098 | { |
b37ad28b | 4099 | __be32 status; |
fe0750e5 | 4100 | struct nfs4_openowner *oo; |
dcef0413 | 4101 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
4102 | struct net *net = SVC_NET(rqstp); |
4103 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 4104 | |
a6a9f18f AV |
4105 | dprintk("NFSD: nfsd4_close on file %pd\n", |
4106 | cstate->current_fh.fh_dentry); | |
1da177e4 LT |
4107 | |
4108 | nfs4_lock_state(); | |
f7a4d872 BF |
4109 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
4110 | &close->cl_stateid, | |
4111 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 4112 | &stp, nn); |
9411b1d4 | 4113 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 4114 | if (status) |
1da177e4 | 4115 | goto out; |
fe0750e5 | 4116 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
4117 | update_stateid(&stp->st_stid.sc_stateid); |
4118 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 4119 | |
f7a4d872 | 4120 | nfsd4_close_open_stateid(stp); |
9411b1d4 | 4121 | |
01a87d91 | 4122 | if (cstate->minorversion) |
9411b1d4 | 4123 | free_generic_stateid(stp); |
01a87d91 | 4124 | else |
9411b1d4 | 4125 | oo->oo_last_closed_stid = stp; |
04ef5954 | 4126 | |
74dbafaf | 4127 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 4128 | if (cstate->minorversion) |
74dbafaf | 4129 | release_openowner(oo); |
3d74e6a5 | 4130 | else { |
74dbafaf BF |
4131 | /* |
4132 | * In the 4.0 case we need to keep the owners around a | |
4133 | * little while to handle CLOSE replay. | |
4134 | */ | |
53584f66 | 4135 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
4136 | } |
4137 | } | |
1da177e4 | 4138 | out: |
5ec094c1 BF |
4139 | if (!cstate->replay_owner) |
4140 | nfs4_unlock_state(); | |
1da177e4 LT |
4141 | return status; |
4142 | } | |
4143 | ||
b37ad28b | 4144 | __be32 |
ca364317 BF |
4145 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4146 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4147 | { |
203a8c8e BF |
4148 | struct nfs4_delegation *dp; |
4149 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4150 | struct nfs4_stid *s; |
b37ad28b | 4151 | __be32 status; |
3320fef1 | 4152 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4153 | |
ca364317 | 4154 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4155 | return status; |
1da177e4 LT |
4156 | |
4157 | nfs4_lock_state(); | |
3320fef1 SK |
4158 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
4159 | cstate->minorversion, nn); | |
38c2f4b1 | 4160 | if (status) |
203a8c8e | 4161 | goto out; |
38c2f4b1 | 4162 | dp = delegstateid(s); |
d5477a8d | 4163 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4164 | if (status) |
4165 | goto out; | |
203a8c8e | 4166 | |
3bd64a5b | 4167 | destroy_delegation(dp); |
1da177e4 | 4168 | out: |
203a8c8e BF |
4169 | nfs4_unlock_state(); |
4170 | ||
1da177e4 LT |
4171 | return status; |
4172 | } | |
4173 | ||
4174 | ||
1da177e4 | 4175 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4176 | |
009673b4 | 4177 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 4178 | |
87df4de8 BH |
4179 | static inline u64 |
4180 | end_offset(u64 start, u64 len) | |
4181 | { | |
4182 | u64 end; | |
4183 | ||
4184 | end = start + len; | |
4185 | return end >= start ? end: NFS4_MAX_UINT64; | |
4186 | } | |
4187 | ||
4188 | /* last octet in a range */ | |
4189 | static inline u64 | |
4190 | last_byte_offset(u64 start, u64 len) | |
4191 | { | |
4192 | u64 end; | |
4193 | ||
063b0fb9 | 4194 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4195 | end = start + len; |
4196 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4197 | } | |
4198 | ||
009673b4 | 4199 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
4200 | { |
4201 | return (file_hashval(inode) + cl_id | |
4202 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 4203 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
4204 | } |
4205 | ||
1da177e4 LT |
4206 | /* |
4207 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4208 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4209 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4210 | * locking, this prevents us from being completely protocol-compliant. The | |
4211 | * real solution to this problem is to start using unsigned file offsets in | |
4212 | * the VFS, but this is a very deep change! | |
4213 | */ | |
4214 | static inline void | |
4215 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4216 | { | |
4217 | if (lock->fl_start < 0) | |
4218 | lock->fl_start = OFFSET_MAX; | |
4219 | if (lock->fl_end < 0) | |
4220 | lock->fl_end = OFFSET_MAX; | |
4221 | } | |
4222 | ||
d5b9026a N |
4223 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4224 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4225 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4226 | }; |
1da177e4 LT |
4227 | |
4228 | static inline void | |
4229 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4230 | { | |
fe0750e5 | 4231 | struct nfs4_lockowner *lo; |
1da177e4 | 4232 | |
d5b9026a | 4233 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4234 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4235 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4236 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4237 | if (!deny->ld_owner.data) |
4238 | /* We just don't care that much */ | |
4239 | goto nevermind; | |
fe0750e5 BF |
4240 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4241 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4242 | } else { |
7c13f344 BF |
4243 | nevermind: |
4244 | deny->ld_owner.len = 0; | |
4245 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4246 | deny->ld_clientid.cl_boot = 0; |
4247 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4248 | } |
4249 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4250 | deny->ld_length = NFS4_MAX_UINT64; |
4251 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4252 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4253 | deny->ld_type = NFS4_READ_LT; | |
4254 | if (fl->fl_type != F_RDLCK) | |
4255 | deny->ld_type = NFS4_WRITE_LT; | |
4256 | } | |
4257 | ||
b93d87c1 BF |
4258 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
4259 | { | |
4260 | struct nfs4_ol_stateid *lst; | |
4261 | ||
4262 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
4263 | return false; | |
27b11428 BF |
4264 | if (list_empty(&lo->lo_owner.so_stateids)) { |
4265 | WARN_ON_ONCE(1); | |
4266 | return false; | |
4267 | } | |
b93d87c1 BF |
4268 | lst = list_first_entry(&lo->lo_owner.so_stateids, |
4269 | struct nfs4_ol_stateid, st_perstateowner); | |
4270 | return lst->st_file->fi_inode == inode; | |
4271 | } | |
4272 | ||
fe0750e5 BF |
4273 | static struct nfs4_lockowner * |
4274 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4275 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4276 | { |
009673b4 | 4277 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4278 | struct nfs4_lockowner *lo; |
1da177e4 | 4279 | |
20e9e2bc | 4280 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4281 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4282 | return lo; | |
1da177e4 LT |
4283 | } |
4284 | return NULL; | |
4285 | } | |
4286 | ||
dcef0413 | 4287 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4288 | { |
009673b4 BF |
4289 | struct inode *inode = open_stp->st_file->fi_inode; |
4290 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4291 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4292 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4293 | |
9b531137 | 4294 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4295 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4296 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4297 | } |
4298 | ||
1da177e4 LT |
4299 | /* |
4300 | * Alloc a lock owner structure. | |
4301 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4302 | * occurred. |
1da177e4 | 4303 | * |
16bfdaaf | 4304 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4305 | */ |
4306 | ||
fe0750e5 | 4307 | static struct nfs4_lockowner * |
dcef0413 | 4308 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4309 | struct nfs4_lockowner *lo; |
1da177e4 | 4310 | |
fe0750e5 BF |
4311 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4312 | if (!lo) | |
1da177e4 | 4313 | return NULL; |
fe0750e5 BF |
4314 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4315 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4316 | /* It is the openowner seqid that will be incremented in encode in the |
4317 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4318 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4319 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4320 | return lo; | |
1da177e4 LT |
4321 | } |
4322 | ||
dcef0413 BF |
4323 | static struct nfs4_ol_stateid * |
4324 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4325 | { |
dcef0413 | 4326 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4327 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4328 | |
996e0938 | 4329 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4330 | if (stp == NULL) |
6136d2b4 | 4331 | return NULL; |
3abdb607 | 4332 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4333 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4334 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4335 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4336 | get_nfs4_file(fp); |
1da177e4 | 4337 | stp->st_file = fp; |
0997b173 | 4338 | stp->st_access_bmap = 0; |
1da177e4 | 4339 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4340 | stp->st_openstp = open_stp; |
1da177e4 LT |
4341 | return stp; |
4342 | } | |
4343 | ||
fd39ca9a | 4344 | static int |
1da177e4 LT |
4345 | check_lock_length(u64 offset, u64 length) |
4346 | { | |
87df4de8 | 4347 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4348 | LOFF_OVERFLOW(offset, length))); |
4349 | } | |
4350 | ||
dcef0413 | 4351 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4352 | { |
4353 | struct nfs4_file *fp = lock_stp->st_file; | |
4354 | int oflag = nfs4_access_to_omode(access); | |
4355 | ||
82c5ff1b | 4356 | if (test_access(access, lock_stp)) |
0997b173 BF |
4357 | return; |
4358 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4359 | set_access(access, lock_stp); |
0997b173 BF |
4360 | } |
4361 | ||
2355c596 | 4362 | 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 |
4363 | { |
4364 | struct nfs4_file *fi = ost->st_file; | |
4365 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4366 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4367 | struct nfs4_lockowner *lo; | |
4368 | unsigned int strhashval; | |
20e9e2bc | 4369 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4370 | |
20e9e2bc SK |
4371 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4372 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4373 | if (lo) { |
4374 | if (!cstate->minorversion) | |
4375 | return nfserr_bad_seqid; | |
4376 | /* XXX: a lockowner always has exactly one stateid: */ | |
4377 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4378 | struct nfs4_ol_stateid, st_perstateowner); | |
4379 | return nfs_ok; | |
4380 | } | |
16bfdaaf | 4381 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4382 | &lock->v.new.owner); |
4383 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4384 | if (lo == NULL) | |
4385 | return nfserr_jukebox; | |
4386 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4387 | if (*lst == NULL) { | |
4388 | release_lockowner(lo); | |
4389 | return nfserr_jukebox; | |
4390 | } | |
4391 | *new = true; | |
4392 | return nfs_ok; | |
4393 | } | |
4394 | ||
1da177e4 LT |
4395 | /* |
4396 | * LOCK operation | |
4397 | */ | |
b37ad28b | 4398 | __be32 |
ca364317 | 4399 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4400 | struct nfsd4_lock *lock) |
1da177e4 | 4401 | { |
fe0750e5 BF |
4402 | struct nfs4_openowner *open_sop = NULL; |
4403 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4404 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4405 | struct file *filp = NULL; |
21179d81 JL |
4406 | struct file_lock *file_lock = NULL; |
4407 | struct file_lock *conflock = NULL; | |
b37ad28b | 4408 | __be32 status = 0; |
64a284d0 | 4409 | bool new_state = false; |
b34f27aa | 4410 | int lkflg; |
b8dd7b9a | 4411 | int err; |
3320fef1 SK |
4412 | struct net *net = SVC_NET(rqstp); |
4413 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4414 | |
4415 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4416 | (long long) lock->lk_offset, | |
4417 | (long long) lock->lk_length); | |
4418 | ||
1da177e4 LT |
4419 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4420 | return nfserr_inval; | |
4421 | ||
ca364317 | 4422 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4423 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4424 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4425 | return status; | |
4426 | } | |
4427 | ||
1da177e4 LT |
4428 | nfs4_lock_state(); |
4429 | ||
4430 | if (lock->lk_is_new) { | |
dcef0413 | 4431 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4432 | |
4433 | if (nfsd4_has_session(cstate)) | |
4434 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4435 | memcpy(&lock->v.new.clientid, | |
4436 | &cstate->session->se_client->cl_clientid, | |
4437 | sizeof(clientid_t)); | |
4438 | ||
1da177e4 | 4439 | status = nfserr_stale_clientid; |
2c142baa | 4440 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4441 | goto out; |
1da177e4 | 4442 | |
1da177e4 | 4443 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4444 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4445 | lock->lk_new_open_seqid, |
4446 | &lock->lk_new_open_stateid, | |
3320fef1 | 4447 | &open_stp, nn); |
37515177 | 4448 | if (status) |
1da177e4 | 4449 | goto out; |
fe0750e5 | 4450 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4451 | status = nfserr_bad_stateid; |
684e5638 | 4452 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4453 | &lock->v.new.clientid)) |
4454 | goto out; | |
64a284d0 BF |
4455 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4456 | &lock_stp, &new_state); | |
e1aaa891 | 4457 | } else |
dd453dfd | 4458 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4459 | lock->lk_old_lock_seqid, |
4460 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4461 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4462 | if (status) |
4463 | goto out; | |
64a284d0 | 4464 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4465 | |
b34f27aa BF |
4466 | lkflg = setlkflg(lock->lk_type); |
4467 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4468 | if (status) | |
4469 | goto out; | |
4470 | ||
0dd395dc | 4471 | status = nfserr_grace; |
3320fef1 | 4472 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4473 | goto out; |
4474 | status = nfserr_no_grace; | |
3320fef1 | 4475 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4476 | goto out; |
4477 | ||
21179d81 JL |
4478 | file_lock = locks_alloc_lock(); |
4479 | if (!file_lock) { | |
4480 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4481 | status = nfserr_jukebox; | |
4482 | goto out; | |
4483 | } | |
4484 | ||
4485 | locks_init_lock(file_lock); | |
1da177e4 LT |
4486 | switch (lock->lk_type) { |
4487 | case NFS4_READ_LT: | |
4488 | case NFS4_READW_LT: | |
0997b173 BF |
4489 | filp = find_readable_file(lock_stp->st_file); |
4490 | if (filp) | |
4491 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4492 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4493 | break; |
1da177e4 LT |
4494 | case NFS4_WRITE_LT: |
4495 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4496 | filp = find_writeable_file(lock_stp->st_file); |
4497 | if (filp) | |
4498 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4499 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4500 | break; |
1da177e4 LT |
4501 | default: |
4502 | status = nfserr_inval; | |
4503 | goto out; | |
4504 | } | |
f9d7562f BF |
4505 | if (!filp) { |
4506 | status = nfserr_openmode; | |
4507 | goto out; | |
4508 | } | |
21179d81 JL |
4509 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4510 | file_lock->fl_pid = current->tgid; | |
4511 | file_lock->fl_file = filp; | |
4512 | file_lock->fl_flags = FL_POSIX; | |
4513 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4514 | file_lock->fl_start = lock->lk_offset; | |
4515 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4516 | nfs4_transform_lock_offset(file_lock); | |
4517 | ||
4518 | conflock = locks_alloc_lock(); | |
4519 | if (!conflock) { | |
4520 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4521 | status = nfserr_jukebox; | |
4522 | goto out; | |
4523 | } | |
1da177e4 | 4524 | |
21179d81 | 4525 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4526 | switch (-err) { |
1da177e4 | 4527 | case 0: /* success! */ |
dcef0413 BF |
4528 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4529 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4530 | sizeof(stateid_t)); |
b8dd7b9a | 4531 | status = 0; |
eb76b3fd AA |
4532 | break; |
4533 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4534 | status = nfserr_denied; | |
4535 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4536 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4537 | break; |
1da177e4 LT |
4538 | case (EDEADLK): |
4539 | status = nfserr_deadlock; | |
eb76b3fd | 4540 | break; |
3e772463 | 4541 | default: |
fd85b817 | 4542 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4543 | status = nfserrno(err); |
eb76b3fd | 4544 | break; |
1da177e4 | 4545 | } |
1da177e4 | 4546 | out: |
64a284d0 | 4547 | if (status && new_state) |
f044ff83 | 4548 | release_lockowner(lock_sop); |
9411b1d4 | 4549 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4550 | if (!cstate->replay_owner) |
4551 | nfs4_unlock_state(); | |
21179d81 JL |
4552 | if (file_lock) |
4553 | locks_free_lock(file_lock); | |
4554 | if (conflock) | |
4555 | locks_free_lock(conflock); | |
1da177e4 LT |
4556 | return status; |
4557 | } | |
4558 | ||
55ef1274 BF |
4559 | /* |
4560 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4561 | * so we do a temporary open here just to get an open file to pass to | |
4562 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4563 | * inode operation.) | |
4564 | */ | |
04da6e9d | 4565 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4566 | { |
4567 | struct file *file; | |
04da6e9d AV |
4568 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4569 | if (!err) { | |
4570 | err = nfserrno(vfs_test_lock(file, lock)); | |
4571 | nfsd_close(file); | |
4572 | } | |
55ef1274 BF |
4573 | return err; |
4574 | } | |
4575 | ||
1da177e4 LT |
4576 | /* |
4577 | * LOCKT operation | |
4578 | */ | |
b37ad28b | 4579 | __be32 |
ca364317 BF |
4580 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4581 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4582 | { |
4583 | struct inode *inode; | |
21179d81 | 4584 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4585 | struct nfs4_lockowner *lo; |
b37ad28b | 4586 | __be32 status; |
7f2210fa | 4587 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4588 | |
5ccb0066 | 4589 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4590 | return nfserr_grace; |
4591 | ||
4592 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4593 | return nfserr_inval; | |
4594 | ||
1da177e4 LT |
4595 | nfs4_lock_state(); |
4596 | ||
9b2ef62b BF |
4597 | if (!nfsd4_has_session(cstate)) { |
4598 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4599 | if (status) | |
4600 | goto out; | |
4601 | } | |
1da177e4 | 4602 | |
75c096f7 | 4603 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4604 | goto out; |
1da177e4 | 4605 | |
ca364317 | 4606 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4607 | file_lock = locks_alloc_lock(); |
4608 | if (!file_lock) { | |
4609 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4610 | status = nfserr_jukebox; | |
4611 | goto out; | |
4612 | } | |
4613 | locks_init_lock(file_lock); | |
1da177e4 LT |
4614 | switch (lockt->lt_type) { |
4615 | case NFS4_READ_LT: | |
4616 | case NFS4_READW_LT: | |
21179d81 | 4617 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4618 | break; |
4619 | case NFS4_WRITE_LT: | |
4620 | case NFS4_WRITEW_LT: | |
21179d81 | 4621 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4622 | break; |
4623 | default: | |
2fdada03 | 4624 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4625 | status = nfserr_inval; |
4626 | goto out; | |
4627 | } | |
4628 | ||
20e9e2bc | 4629 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4630 | if (lo) |
21179d81 JL |
4631 | file_lock->fl_owner = (fl_owner_t)lo; |
4632 | file_lock->fl_pid = current->tgid; | |
4633 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4634 | |
21179d81 JL |
4635 | file_lock->fl_start = lockt->lt_offset; |
4636 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4637 | |
21179d81 | 4638 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4639 | |
21179d81 | 4640 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4641 | if (status) |
fd85b817 | 4642 | goto out; |
04da6e9d | 4643 | |
21179d81 | 4644 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4645 | status = nfserr_denied; |
21179d81 | 4646 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4647 | } |
4648 | out: | |
4649 | nfs4_unlock_state(); | |
21179d81 JL |
4650 | if (file_lock) |
4651 | locks_free_lock(file_lock); | |
1da177e4 LT |
4652 | return status; |
4653 | } | |
4654 | ||
b37ad28b | 4655 | __be32 |
ca364317 | 4656 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4657 | struct nfsd4_locku *locku) |
1da177e4 | 4658 | { |
dcef0413 | 4659 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4660 | struct file *filp = NULL; |
21179d81 | 4661 | struct file_lock *file_lock = NULL; |
b37ad28b | 4662 | __be32 status; |
b8dd7b9a | 4663 | int err; |
3320fef1 SK |
4664 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4665 | ||
1da177e4 LT |
4666 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4667 | (long long) locku->lu_offset, | |
4668 | (long long) locku->lu_length); | |
4669 | ||
4670 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4671 | return nfserr_inval; | |
4672 | ||
4673 | nfs4_lock_state(); | |
4674 | ||
9072d5c6 | 4675 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4676 | &locku->lu_stateid, NFS4_LOCK_STID, |
4677 | &stp, nn); | |
9072d5c6 | 4678 | if (status) |
1da177e4 | 4679 | goto out; |
f9d7562f BF |
4680 | filp = find_any_file(stp->st_file); |
4681 | if (!filp) { | |
4682 | status = nfserr_lock_range; | |
4683 | goto out; | |
4684 | } | |
21179d81 JL |
4685 | file_lock = locks_alloc_lock(); |
4686 | if (!file_lock) { | |
4687 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4688 | status = nfserr_jukebox; | |
4689 | goto out; | |
4690 | } | |
4691 | locks_init_lock(file_lock); | |
4692 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4693 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4694 | file_lock->fl_pid = current->tgid; |
4695 | file_lock->fl_file = filp; | |
4696 | file_lock->fl_flags = FL_POSIX; | |
4697 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4698 | file_lock->fl_start = locku->lu_offset; | |
4699 | ||
4700 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4701 | locku->lu_length); | |
4702 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4703 | |
21179d81 | 4704 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4705 | if (err) { |
fd85b817 | 4706 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4707 | goto out_nfserr; |
4708 | } | |
dcef0413 BF |
4709 | update_stateid(&stp->st_stid.sc_stateid); |
4710 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4711 | |
4712 | out: | |
9411b1d4 | 4713 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4714 | if (!cstate->replay_owner) |
4715 | nfs4_unlock_state(); | |
21179d81 JL |
4716 | if (file_lock) |
4717 | locks_free_lock(file_lock); | |
1da177e4 LT |
4718 | return status; |
4719 | ||
4720 | out_nfserr: | |
b8dd7b9a | 4721 | status = nfserrno(err); |
1da177e4 LT |
4722 | goto out; |
4723 | } | |
4724 | ||
4725 | /* | |
4726 | * returns | |
4727 | * 1: locks held by lockowner | |
4728 | * 0: no locks held by lockowner | |
4729 | */ | |
4730 | static int | |
fe0750e5 | 4731 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4732 | { |
4733 | struct file_lock **flpp; | |
f9d7562f | 4734 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4735 | int status = 0; |
4736 | ||
1c8c601a | 4737 | spin_lock(&inode->i_lock); |
1da177e4 | 4738 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4739 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4740 | status = 1; |
4741 | goto out; | |
796dadfd | 4742 | } |
1da177e4 LT |
4743 | } |
4744 | out: | |
1c8c601a | 4745 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
4746 | return status; |
4747 | } | |
4748 | ||
b37ad28b | 4749 | __be32 |
b591480b BF |
4750 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4751 | struct nfsd4_compound_state *cstate, | |
4752 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4753 | { |
4754 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4755 | struct nfs4_stateowner *sop; |
fe0750e5 | 4756 | struct nfs4_lockowner *lo; |
dcef0413 | 4757 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4758 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4759 | struct list_head matches; |
16bfdaaf | 4760 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4761 | __be32 status; |
7f2210fa | 4762 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4763 | |
4764 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4765 | clid->cl_boot, clid->cl_id); | |
4766 | ||
1da177e4 LT |
4767 | nfs4_lock_state(); |
4768 | ||
9b2ef62b BF |
4769 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4770 | if (status) | |
4771 | goto out; | |
4772 | ||
3e9e3dbe | 4773 | status = nfserr_locks_held; |
3e9e3dbe | 4774 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4775 | |
9b531137 | 4776 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4777 | if (sop->so_is_open_owner) |
4778 | continue; | |
06f1f864 BF |
4779 | if (!same_owner_str(sop, owner, clid)) |
4780 | continue; | |
4781 | list_for_each_entry(stp, &sop->so_stateids, | |
4782 | st_perstateowner) { | |
4783 | lo = lockowner(sop); | |
4784 | if (check_for_locks(stp->st_file, lo)) | |
4785 | goto out; | |
4786 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4787 | } |
3e9e3dbe N |
4788 | } |
4789 | /* Clients probably won't expect us to return with some (but not all) | |
4790 | * of the lockowner state released; so don't release any until all | |
4791 | * have been checked. */ | |
4792 | status = nfs_ok; | |
0fa822e4 | 4793 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4794 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4795 | lo_list); | |
0fa822e4 N |
4796 | /* unhash_stateowner deletes so_perclient only |
4797 | * for openowners. */ | |
fe0750e5 BF |
4798 | list_del(&lo->lo_list); |
4799 | release_lockowner(lo); | |
1da177e4 LT |
4800 | } |
4801 | out: | |
4802 | nfs4_unlock_state(); | |
4803 | return status; | |
4804 | } | |
4805 | ||
4806 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4807 | alloc_reclaim(void) |
1da177e4 | 4808 | { |
a55370a3 | 4809 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4810 | } |
4811 | ||
0ce0c2b5 | 4812 | bool |
52e19c09 | 4813 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4814 | { |
0ce0c2b5 | 4815 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4816 | |
52e19c09 | 4817 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4818 | return (crp && crp->cr_clp); |
c7b9a459 N |
4819 | } |
4820 | ||
1da177e4 LT |
4821 | /* |
4822 | * failure => all reset bets are off, nfserr_no_grace... | |
4823 | */ | |
772a9bbb | 4824 | struct nfs4_client_reclaim * |
52e19c09 | 4825 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4826 | { |
4827 | unsigned int strhashval; | |
772a9bbb | 4828 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4829 | |
a55370a3 N |
4830 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4831 | crp = alloc_reclaim(); | |
772a9bbb JL |
4832 | if (crp) { |
4833 | strhashval = clientstr_hashval(name); | |
4834 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4835 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4836 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4837 | crp->cr_clp = NULL; |
52e19c09 | 4838 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4839 | } |
4840 | return crp; | |
1da177e4 LT |
4841 | } |
4842 | ||
ce30e539 | 4843 | void |
52e19c09 | 4844 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4845 | { |
4846 | list_del(&crp->cr_strhash); | |
4847 | kfree(crp); | |
52e19c09 | 4848 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4849 | } |
4850 | ||
2a4317c5 | 4851 | void |
52e19c09 | 4852 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4853 | { |
4854 | struct nfs4_client_reclaim *crp = NULL; | |
4855 | int i; | |
4856 | ||
1da177e4 | 4857 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4858 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4859 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4860 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4861 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4862 | } |
4863 | } | |
063b0fb9 | 4864 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4865 | } |
4866 | ||
4867 | /* | |
4868 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4869 | struct nfs4_client_reclaim * |
52e19c09 | 4870 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4871 | { |
4872 | unsigned int strhashval; | |
1da177e4 LT |
4873 | struct nfs4_client_reclaim *crp = NULL; |
4874 | ||
278c931c | 4875 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4876 | |
278c931c | 4877 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4878 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4879 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4880 | return crp; |
4881 | } | |
4882 | } | |
4883 | return NULL; | |
4884 | } | |
4885 | ||
4886 | /* | |
4887 | * Called from OPEN. Look for clientid in reclaim list. | |
4888 | */ | |
b37ad28b | 4889 | __be32 |
3320fef1 | 4890 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4891 | { |
a52d726b JL |
4892 | struct nfs4_client *clp; |
4893 | ||
4894 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4895 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4896 | if (clp == NULL) |
4897 | return nfserr_reclaim_bad; | |
4898 | ||
4899 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4900 | } |
4901 | ||
65178db4 BS |
4902 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4903 | ||
44e34da6 BS |
4904 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4905 | { | |
221a6876 BF |
4906 | if (mark_client_expired(clp)) |
4907 | return 0; | |
44e34da6 BS |
4908 | expire_client(clp); |
4909 | return 1; | |
4910 | } | |
4911 | ||
184c1847 BS |
4912 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4913 | { | |
4914 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4915 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4916 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4917 | return 1; | |
4918 | } | |
4919 | ||
4920 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4921 | const char *type) | |
4922 | { | |
4923 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4924 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4925 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4926 | } | |
4927 | ||
fc29171f BS |
4928 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4929 | { | |
4930 | struct nfs4_openowner *oop; | |
4931 | struct nfs4_lockowner *lop, *lo_next; | |
4932 | struct nfs4_ol_stateid *stp, *st_next; | |
4933 | u64 count = 0; | |
4934 | ||
4935 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4936 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4937 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4938 | if (func) | |
4939 | func(lop); | |
4940 | if (++count == max) | |
4941 | return count; | |
4942 | } | |
4943 | } | |
4944 | } | |
4945 | ||
4946 | return count; | |
4947 | } | |
4948 | ||
4949 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4950 | { | |
4951 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4952 | } | |
4953 | ||
184c1847 BS |
4954 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4955 | { | |
4956 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4957 | nfsd_print_count(clp, count, "locked files"); | |
4958 | return count; | |
4959 | } | |
4960 | ||
4dbdbda8 BS |
4961 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4962 | { | |
4963 | struct nfs4_openowner *oop, *next; | |
4964 | u64 count = 0; | |
4965 | ||
4966 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4967 | if (func) | |
4968 | func(oop); | |
4969 | if (++count == max) | |
4970 | break; | |
4971 | } | |
4972 | ||
4973 | return count; | |
4974 | } | |
4975 | ||
4976 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4977 | { | |
4978 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4979 | } | |
4980 | ||
184c1847 BS |
4981 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4982 | { | |
4983 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4984 | nfsd_print_count(clp, count, "open files"); | |
4985 | return count; | |
4986 | } | |
4987 | ||
269de30f BS |
4988 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4989 | struct list_head *victims) | |
4990 | { | |
4991 | struct nfs4_delegation *dp, *next; | |
4992 | u64 count = 0; | |
4993 | ||
cdc97505 | 4994 | lockdep_assert_held(&state_lock); |
269de30f BS |
4995 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
4996 | if (victims) | |
4997 | list_move(&dp->dl_recall_lru, victims); | |
4998 | if (++count == max) | |
4999 | break; | |
5000 | } | |
5001 | return count; | |
5002 | } | |
5003 | ||
5004 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
5005 | { | |
5006 | struct nfs4_delegation *dp, *next; | |
5007 | LIST_HEAD(victims); | |
5008 | u64 count; | |
5009 | ||
cdc97505 | 5010 | spin_lock(&state_lock); |
269de30f | 5011 | count = nfsd_find_all_delegations(clp, max, &victims); |
cdc97505 | 5012 | spin_unlock(&state_lock); |
269de30f BS |
5013 | |
5014 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 5015 | revoke_delegation(dp); |
269de30f BS |
5016 | |
5017 | return count; | |
5018 | } | |
5019 | ||
5020 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
5021 | { | |
5022 | struct nfs4_delegation *dp, *next; | |
5023 | LIST_HEAD(victims); | |
5024 | u64 count; | |
5025 | ||
cdc97505 | 5026 | spin_lock(&state_lock); |
269de30f BS |
5027 | count = nfsd_find_all_delegations(clp, max, &victims); |
5028 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
5029 | nfsd_break_one_deleg(dp); | |
cdc97505 | 5030 | spin_unlock(&state_lock); |
269de30f BS |
5031 | |
5032 | return count; | |
5033 | } | |
5034 | ||
184c1847 BS |
5035 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
5036 | { | |
5037 | u64 count = 0; | |
5038 | ||
cdc97505 | 5039 | spin_lock(&state_lock); |
184c1847 | 5040 | count = nfsd_find_all_delegations(clp, max, NULL); |
cdc97505 | 5041 | spin_unlock(&state_lock); |
184c1847 BS |
5042 | |
5043 | nfsd_print_count(clp, count, "delegations"); | |
5044 | return count; | |
5045 | } | |
5046 | ||
44e34da6 | 5047 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
5048 | { |
5049 | struct nfs4_client *clp, *next; | |
44e34da6 | 5050 | u64 count = 0; |
3320fef1 | 5051 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 5052 | |
44e34da6 BS |
5053 | if (!nfsd_netns_ready(nn)) |
5054 | return 0; | |
5055 | ||
5ed58bb2 | 5056 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
5057 | count += func(clp, max - count); |
5058 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
5059 | break; |
5060 | } | |
65178db4 | 5061 | |
44e34da6 BS |
5062 | return count; |
5063 | } | |
5064 | ||
6c1e82a4 BS |
5065 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
5066 | { | |
5067 | struct nfs4_client *clp; | |
5068 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
5069 | ||
5070 | if (!nfsd_netns_ready(nn)) | |
5071 | return NULL; | |
5072 | ||
5073 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
5074 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
5075 | return clp; | |
5076 | } | |
5077 | return NULL; | |
5078 | } | |
5079 | ||
65178db4 BS |
5080 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
5081 | ||
c2f1a551 MS |
5082 | /* |
5083 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
5084 | * client may quite reasonably hang on to a delegation as long as it has | |
5085 | * the inode cached. This becomes an obvious problem the first time a | |
5086 | * client's inode cache approaches the size of the server's total memory. | |
5087 | * | |
5088 | * For now we avoid this problem by imposing a hard limit on the number | |
5089 | * of delegations, which varies according to the server's memory size. | |
5090 | */ | |
5091 | static void | |
5092 | set_max_delegations(void) | |
5093 | { | |
5094 | /* | |
5095 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
5096 | * estimates suggest that in the worst case (where every delegation | |
5097 | * is for a different inode), a delegation could take about 1.5K, | |
5098 | * giving a worst case usage of about 6% of memory. | |
5099 | */ | |
5100 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
5101 | } | |
5102 | ||
d85ed443 | 5103 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
5104 | { |
5105 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5106 | int i; | |
5107 | ||
5108 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
5109 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5110 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 5111 | goto err; |
0a7ec377 SK |
5112 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
5113 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
5114 | if (!nn->unconf_id_hashtbl) | |
5115 | goto err_unconf_id; | |
9b531137 SK |
5116 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
5117 | OWNER_HASH_SIZE, GFP_KERNEL); | |
5118 | if (!nn->ownerstr_hashtbl) | |
5119 | goto err_ownerstr; | |
20e9e2bc SK |
5120 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
5121 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
5122 | if (!nn->lockowner_ino_hashtbl) | |
5123 | goto err_lockowner_ino; | |
1872de0e SK |
5124 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
5125 | SESSION_HASH_SIZE, GFP_KERNEL); | |
5126 | if (!nn->sessionid_hashtbl) | |
5127 | goto err_sessionid; | |
8daae4dc | 5128 | |
382a62e7 | 5129 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 5130 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 5131 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 5132 | } |
9b531137 SK |
5133 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
5134 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
5135 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
5136 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
5137 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5138 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5139 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5140 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5141 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5142 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5143 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5144 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5145 | |
09121281 | 5146 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5147 | get_net(net); |
09121281 | 5148 | |
8daae4dc | 5149 | return 0; |
382a62e7 | 5150 | |
1872de0e SK |
5151 | err_sessionid: |
5152 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
5153 | err_lockowner_ino: |
5154 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
5155 | err_ownerstr: |
5156 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5157 | err_unconf_id: |
5158 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5159 | err: |
5160 | return -ENOMEM; | |
8daae4dc SK |
5161 | } |
5162 | ||
5163 | static void | |
4dce0ac9 | 5164 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5165 | { |
5166 | int i; | |
5167 | struct nfs4_client *clp = NULL; | |
5168 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
5169 | ||
5170 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5171 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5172 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5173 | destroy_client(clp); | |
5174 | } | |
5175 | } | |
a99454aa | 5176 | |
2b905635 KM |
5177 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
5178 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
5179 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5180 | destroy_client(clp); | |
5181 | } | |
a99454aa SK |
5182 | } |
5183 | ||
1872de0e | 5184 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 5185 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 5186 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5187 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5188 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5189 | put_net(net); |
8daae4dc SK |
5190 | } |
5191 | ||
f252bc68 | 5192 | int |
d85ed443 | 5193 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5194 | { |
5e1533c7 | 5195 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5196 | int ret; |
5197 | ||
d85ed443 | 5198 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5199 | if (ret) |
5200 | return ret; | |
5e1533c7 | 5201 | nfsd4_client_tracking_init(net); |
2c142baa | 5202 | nn->boot_time = get_seconds(); |
5ccb0066 | 5203 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5204 | nn->grace_ended = false; |
d85ed443 | 5205 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5206 | nn->nfsd4_grace, net); |
5207 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5208 | return 0; |
5209 | } | |
5210 | ||
5211 | /* initialization to perform when the nfsd service is started: */ | |
5212 | ||
5213 | int | |
5214 | nfs4_state_start(void) | |
5215 | { | |
5216 | int ret; | |
5217 | ||
b5a1a81e | 5218 | ret = set_callback_cred(); |
d85ed443 SK |
5219 | if (ret) |
5220 | return -ENOMEM; | |
58da282b | 5221 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5222 | if (laundry_wq == NULL) { |
5223 | ret = -ENOMEM; | |
5224 | goto out_recovery; | |
5225 | } | |
b5a1a81e BF |
5226 | ret = nfsd4_create_callback_queue(); |
5227 | if (ret) | |
5228 | goto out_free_laundry; | |
09121281 | 5229 | |
c2f1a551 | 5230 | set_max_delegations(); |
d85ed443 | 5231 | |
b5a1a81e | 5232 | return 0; |
d85ed443 | 5233 | |
b5a1a81e BF |
5234 | out_free_laundry: |
5235 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5236 | out_recovery: |
b5a1a81e | 5237 | return ret; |
1da177e4 LT |
5238 | } |
5239 | ||
f252bc68 | 5240 | void |
4dce0ac9 | 5241 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5242 | { |
1da177e4 | 5243 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5244 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5245 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5246 | |
4dce0ac9 SK |
5247 | cancel_delayed_work_sync(&nn->laundromat_work); |
5248 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5249 | |
e50a26dc | 5250 | nfs4_lock_state(); |
1da177e4 | 5251 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 5252 | spin_lock(&state_lock); |
e8c69d17 | 5253 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5254 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5255 | list_move(&dp->dl_recall_lru, &reaplist); | |
5256 | } | |
cdc97505 | 5257 | spin_unlock(&state_lock); |
1da177e4 LT |
5258 | list_for_each_safe(pos, next, &reaplist) { |
5259 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5260 | destroy_delegation(dp); |
1da177e4 LT |
5261 | } |
5262 | ||
3320fef1 | 5263 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5264 | nfs4_state_destroy_net(net); |
e50a26dc | 5265 | nfs4_unlock_state(); |
1da177e4 LT |
5266 | } |
5267 | ||
5268 | void | |
5269 | nfs4_state_shutdown(void) | |
5270 | { | |
5e8d5c29 | 5271 | destroy_workqueue(laundry_wq); |
c3935e30 | 5272 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5273 | } |
8b70484c TM |
5274 | |
5275 | static void | |
5276 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5277 | { | |
37c593c5 TM |
5278 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5279 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5280 | } |
5281 | ||
5282 | static void | |
5283 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5284 | { | |
37c593c5 TM |
5285 | if (cstate->minorversion) { |
5286 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5287 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5288 | } | |
5289 | } | |
5290 | ||
5291 | void | |
5292 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5293 | { | |
5294 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5295 | } |
5296 | ||
62cd4a59 TM |
5297 | /* |
5298 | * functions to set current state id | |
5299 | */ | |
9428fe1a TM |
5300 | void |
5301 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5302 | { | |
5303 | put_stateid(cstate, &odp->od_stateid); | |
5304 | } | |
5305 | ||
8b70484c TM |
5306 | void |
5307 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5308 | { | |
5309 | put_stateid(cstate, &open->op_stateid); | |
5310 | } | |
5311 | ||
62cd4a59 TM |
5312 | void |
5313 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5314 | { | |
5315 | put_stateid(cstate, &close->cl_stateid); | |
5316 | } | |
5317 | ||
5318 | void | |
5319 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5320 | { | |
5321 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5322 | } | |
5323 | ||
5324 | /* | |
5325 | * functions to consume current state id | |
5326 | */ | |
1e97b519 | 5327 | |
9428fe1a TM |
5328 | void |
5329 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5330 | { | |
5331 | get_stateid(cstate, &odp->od_stateid); | |
5332 | } | |
5333 | ||
5334 | void | |
5335 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5336 | { | |
5337 | get_stateid(cstate, &drp->dr_stateid); | |
5338 | } | |
5339 | ||
1e97b519 TM |
5340 | void |
5341 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5342 | { | |
5343 | get_stateid(cstate, &fsp->fr_stateid); | |
5344 | } | |
5345 | ||
5346 | void | |
5347 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5348 | { | |
5349 | get_stateid(cstate, &setattr->sa_stateid); | |
5350 | } | |
5351 | ||
8b70484c TM |
5352 | void |
5353 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5354 | { | |
5355 | get_stateid(cstate, &close->cl_stateid); | |
5356 | } | |
5357 | ||
5358 | void | |
62cd4a59 | 5359 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5360 | { |
62cd4a59 | 5361 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5362 | } |
30813e27 TM |
5363 | |
5364 | void | |
5365 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5366 | { | |
5367 | get_stateid(cstate, &read->rd_stateid); | |
5368 | } | |
5369 | ||
5370 | void | |
5371 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5372 | { | |
5373 | get_stateid(cstate, &write->wr_stateid); | |
5374 | } |