Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
9a74af21 | 44 | #include "xdr4.h" |
06b332a5 | 45 | #include "xdr4cb.h" |
0a3adade | 46 | #include "vfs.h" |
bfa4b365 | 47 | #include "current_stateid.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
f32f3c2d BF |
53 | #define all_ones {{~0,~0},~0} |
54 | static const stateid_t one_stateid = { | |
55 | .si_generation = ~0, | |
56 | .si_opaque = all_ones, | |
57 | }; | |
58 | static const stateid_t zero_stateid = { | |
59 | /* all fields zero */ | |
60 | }; | |
19ff0f28 TM |
61 | static const stateid_t currentstateid = { |
62 | .si_generation = 1, | |
63 | }; | |
f32f3c2d | 64 | |
ec6b5d7b | 65 | static u64 current_sessionid = 1; |
fd39ca9a | 66 | |
f32f3c2d BF |
67 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
68 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 69 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 70 | |
1da177e4 | 71 | /* forward declarations */ |
fe0750e5 | 72 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* Locking: */ |
75 | ||
76 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 77 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 78 | |
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
84 | static DEFINE_SPINLOCK(recall_lock); | |
85 | ||
fe0750e5 BF |
86 | static struct kmem_cache *openowner_slab = NULL; |
87 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
88 | static struct kmem_cache *file_slab = NULL; |
89 | static struct kmem_cache *stateid_slab = NULL; | |
90 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 91 | |
1da177e4 LT |
92 | void |
93 | nfs4_lock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_lock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
66b2b9b2 | 98 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 99 | |
66b2b9b2 BF |
100 | void nfsd4_put_session(struct nfsd4_session *ses) |
101 | { | |
102 | atomic_dec(&ses->se_ref); | |
103 | } | |
104 | ||
105 | static bool is_session_dead(struct nfsd4_session *ses) | |
508dc6e1 | 106 | { |
66b2b9b2 BF |
107 | return ses->se_flags & NFS4_SESSION_DEAD; |
108 | } | |
109 | ||
110 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses) | |
508dc6e1 | 111 | { |
66b2b9b2 BF |
112 | if (atomic_read(&ses->se_ref)) |
113 | return nfserr_jukebox; | |
114 | ses->se_flags |= NFS4_SESSION_DEAD; | |
115 | return nfs_ok; | |
508dc6e1 BH |
116 | } |
117 | ||
66b2b9b2 | 118 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
508dc6e1 | 119 | { |
66b2b9b2 BF |
120 | if (is_session_dead(ses)) |
121 | return nfserr_badsession; | |
122 | atomic_inc(&ses->se_ref); | |
123 | return nfs_ok; | |
508dc6e1 BH |
124 | } |
125 | ||
1da177e4 LT |
126 | void |
127 | nfs4_unlock_state(void) | |
128 | { | |
353ab6e9 | 129 | mutex_unlock(&client_mutex); |
1da177e4 LT |
130 | } |
131 | ||
221a6876 BF |
132 | static bool is_client_expired(struct nfs4_client *clp) |
133 | { | |
134 | return clp->cl_time == 0; | |
135 | } | |
136 | ||
137 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) | |
138 | { | |
139 | if (atomic_read(&clp->cl_refcount)) | |
140 | return nfserr_jukebox; | |
141 | clp->cl_time = 0; | |
142 | return nfs_ok; | |
143 | } | |
144 | ||
145 | static __be32 mark_client_expired(struct nfs4_client *clp) | |
146 | { | |
147 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
148 | __be32 ret; | |
149 | ||
150 | spin_lock(&nn->client_lock); | |
151 | ret = mark_client_expired_locked(clp); | |
152 | spin_unlock(&nn->client_lock); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | static __be32 get_client_locked(struct nfs4_client *clp) | |
157 | { | |
158 | if (is_client_expired(clp)) | |
159 | return nfserr_expired; | |
160 | atomic_inc(&clp->cl_refcount); | |
161 | return nfs_ok; | |
162 | } | |
163 | ||
164 | /* must be called under the client_lock */ | |
165 | static inline void | |
166 | renew_client_locked(struct nfs4_client *clp) | |
167 | { | |
168 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
169 | ||
170 | if (is_client_expired(clp)) { | |
171 | WARN_ON(1); | |
172 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
173 | __func__, | |
174 | clp->cl_clientid.cl_boot, | |
175 | clp->cl_clientid.cl_id); | |
176 | return; | |
177 | } | |
178 | ||
179 | dprintk("renewing client (clientid %08x/%08x)\n", | |
180 | clp->cl_clientid.cl_boot, | |
181 | clp->cl_clientid.cl_id); | |
182 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
183 | clp->cl_time = get_seconds(); | |
184 | } | |
185 | ||
186 | static inline void | |
187 | renew_client(struct nfs4_client *clp) | |
188 | { | |
189 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
190 | ||
191 | spin_lock(&nn->client_lock); | |
192 | renew_client_locked(clp); | |
193 | spin_unlock(&nn->client_lock); | |
194 | } | |
195 | ||
ba138435 | 196 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 BF |
197 | { |
198 | if (!atomic_dec_and_test(&clp->cl_refcount)) | |
199 | return; | |
200 | if (!is_client_expired(clp)) | |
201 | renew_client_locked(clp); | |
202 | } | |
203 | ||
204 | void put_client_renew(struct nfs4_client *clp) | |
205 | { | |
206 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
207 | ||
208 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) | |
209 | return; | |
210 | if (!is_client_expired(clp)) | |
211 | renew_client_locked(clp); | |
212 | spin_unlock(&nn->client_lock); | |
213 | } | |
214 | ||
215 | ||
1da177e4 LT |
216 | static inline u32 |
217 | opaque_hashval(const void *ptr, int nbytes) | |
218 | { | |
219 | unsigned char *cptr = (unsigned char *) ptr; | |
220 | ||
221 | u32 x = 0; | |
222 | while (nbytes--) { | |
223 | x *= 37; | |
224 | x += *cptr++; | |
225 | } | |
226 | return x; | |
227 | } | |
228 | ||
32513b40 BF |
229 | static void nfsd4_free_file(struct nfs4_file *f) |
230 | { | |
231 | kmem_cache_free(file_slab, f); | |
232 | } | |
233 | ||
13cd2184 N |
234 | static inline void |
235 | put_nfs4_file(struct nfs4_file *fi) | |
236 | { | |
8b671b80 | 237 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
89876f8c | 238 | hlist_del(&fi->fi_hash); |
8b671b80 BF |
239 | spin_unlock(&recall_lock); |
240 | iput(fi->fi_inode); | |
32513b40 | 241 | nfsd4_free_file(fi); |
8b671b80 | 242 | } |
13cd2184 N |
243 | } |
244 | ||
245 | static inline void | |
246 | get_nfs4_file(struct nfs4_file *fi) | |
247 | { | |
8b671b80 | 248 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
249 | } |
250 | ||
ef0f3390 | 251 | static int num_delegations; |
697ce9be | 252 | unsigned long max_delegations; |
ef0f3390 N |
253 | |
254 | /* | |
255 | * Open owner state (share locks) | |
256 | */ | |
257 | ||
16bfdaaf BF |
258 | /* hash tables for lock and open owners */ |
259 | #define OWNER_HASH_BITS 8 | |
260 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
261 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 262 | |
16bfdaaf | 263 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
264 | { |
265 | unsigned int ret; | |
266 | ||
267 | ret = opaque_hashval(ownername->data, ownername->len); | |
268 | ret += clientid; | |
16bfdaaf | 269 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 270 | } |
ef0f3390 | 271 | |
ef0f3390 N |
272 | /* hash table for nfs4_file */ |
273 | #define FILE_HASH_BITS 8 | |
274 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 275 | |
ddc04c41 BF |
276 | static unsigned int file_hashval(struct inode *ino) |
277 | { | |
278 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
279 | return hash_ptr(ino, FILE_HASH_BITS); | |
280 | } | |
281 | ||
89876f8c | 282 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 283 | |
998db52c | 284 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 285 | { |
063b0fb9 | 286 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
f9d7562f BF |
287 | atomic_inc(&fp->fi_access[oflag]); |
288 | } | |
289 | ||
998db52c BF |
290 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
291 | { | |
292 | if (oflag == O_RDWR) { | |
293 | __nfs4_file_get_access(fp, O_RDONLY); | |
294 | __nfs4_file_get_access(fp, O_WRONLY); | |
295 | } else | |
296 | __nfs4_file_get_access(fp, oflag); | |
297 | } | |
298 | ||
299 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
300 | { |
301 | if (fp->fi_fds[oflag]) { | |
302 | fput(fp->fi_fds[oflag]); | |
303 | fp->fi_fds[oflag] = NULL; | |
304 | } | |
305 | } | |
306 | ||
998db52c | 307 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
308 | { |
309 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 310 | nfs4_file_put_fd(fp, oflag); |
0c7c3e67 | 311 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
3d02fa29 | 312 | nfs4_file_put_fd(fp, O_RDWR); |
f9d7562f BF |
313 | } |
314 | } | |
315 | ||
998db52c BF |
316 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
317 | { | |
318 | if (oflag == O_RDWR) { | |
319 | __nfs4_file_put_access(fp, O_RDONLY); | |
320 | __nfs4_file_put_access(fp, O_WRONLY); | |
321 | } else | |
322 | __nfs4_file_put_access(fp, oflag); | |
323 | } | |
324 | ||
3abdb607 BF |
325 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
326 | kmem_cache *slab) | |
2a74aba7 | 327 | { |
3abdb607 | 328 | struct idr *stateids = &cl->cl_stateids; |
3abdb607 | 329 | struct nfs4_stid *stid; |
6136d2b4 | 330 | int new_id; |
2a74aba7 | 331 | |
3abdb607 BF |
332 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
333 | if (!stid) | |
334 | return NULL; | |
335 | ||
398c33aa | 336 | new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); |
ebd6c707 | 337 | if (new_id < 0) |
3abdb607 | 338 | goto out_free; |
2a74aba7 | 339 | stid->sc_client = cl; |
3abdb607 BF |
340 | stid->sc_type = 0; |
341 | stid->sc_stateid.si_opaque.so_id = new_id; | |
342 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 343 | /* Will be incremented before return to client: */ |
3abdb607 | 344 | stid->sc_stateid.si_generation = 0; |
996e0938 | 345 | |
996e0938 | 346 | /* |
3abdb607 BF |
347 | * It shouldn't be a problem to reuse an opaque stateid value. |
348 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
349 | * example, a stray write retransmission could be accepted by | |
350 | * the server when it should have been rejected. Therefore, | |
351 | * adopt a trick from the sctp code to attempt to maximize the | |
352 | * amount of time until an id is reused, by ensuring they always | |
353 | * "increase" (mod INT_MAX): | |
996e0938 | 354 | */ |
3abdb607 BF |
355 | return stid; |
356 | out_free: | |
2c44a234 | 357 | kmem_cache_free(slab, stid); |
3abdb607 | 358 | return NULL; |
2a74aba7 BF |
359 | } |
360 | ||
4cdc951b BF |
361 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
362 | { | |
363 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
364 | } | |
365 | ||
1da177e4 | 366 | static struct nfs4_delegation * |
99c41515 | 367 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) |
1da177e4 LT |
368 | { |
369 | struct nfs4_delegation *dp; | |
370 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
371 | |
372 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
373 | if (fp->fi_had_conflict) |
374 | return NULL; | |
c2f1a551 | 375 | if (num_delegations > max_delegations) |
ef0f3390 | 376 | return NULL; |
996e0938 | 377 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 378 | if (dp == NULL) |
1da177e4 | 379 | return dp; |
3abdb607 | 380 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
2a74aba7 BF |
381 | /* |
382 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
383 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
384 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
385 | */ |
386 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 387 | num_delegations++; |
ea1da636 N |
388 | INIT_LIST_HEAD(&dp->dl_perfile); |
389 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 390 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 391 | get_nfs4_file(fp); |
1da177e4 | 392 | dp->dl_file = fp; |
99c41515 | 393 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
6c02eaa1 | 394 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
395 | dp->dl_time = 0; |
396 | atomic_set(&dp->dl_count, 1); | |
57725155 | 397 | nfsd4_init_callback(&dp->dl_recall); |
1da177e4 LT |
398 | return dp; |
399 | } | |
400 | ||
68a33961 | 401 | static void remove_stid(struct nfs4_stid *s) |
3abdb607 BF |
402 | { |
403 | struct idr *stateids = &s->sc_client->cl_stateids; | |
404 | ||
405 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
3abdb607 BF |
406 | } |
407 | ||
1da177e4 LT |
408 | void |
409 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
410 | { | |
411 | if (atomic_dec_and_test(&dp->dl_count)) { | |
68a33961 | 412 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 413 | num_delegations--; |
1da177e4 LT |
414 | } |
415 | } | |
416 | ||
acfdf5c3 | 417 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 418 | { |
acfdf5c3 BF |
419 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
420 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
421 | fp->fi_lease = NULL; | |
4ee63624 | 422 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
423 | fp->fi_deleg_file = NULL; |
424 | } | |
1da177e4 LT |
425 | } |
426 | ||
6136d2b4 BF |
427 | static void unhash_stid(struct nfs4_stid *s) |
428 | { | |
3abdb607 | 429 | s->sc_type = 0; |
6136d2b4 BF |
430 | } |
431 | ||
1da177e4 LT |
432 | /* Called under the state lock. */ |
433 | static void | |
434 | unhash_delegation(struct nfs4_delegation *dp) | |
435 | { | |
ea1da636 | 436 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 437 | spin_lock(&recall_lock); |
5d926e8c | 438 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
439 | list_del_init(&dp->dl_recall_lru); |
440 | spin_unlock(&recall_lock); | |
acfdf5c3 | 441 | nfs4_put_deleg_lease(dp->dl_file); |
68a33961 BF |
442 | put_nfs4_file(dp->dl_file); |
443 | dp->dl_file = NULL; | |
3bd64a5b BF |
444 | } |
445 | ||
446 | ||
447 | ||
448 | static void destroy_revoked_delegation(struct nfs4_delegation *dp) | |
449 | { | |
450 | list_del_init(&dp->dl_recall_lru); | |
68a33961 | 451 | remove_stid(&dp->dl_stid); |
1da177e4 LT |
452 | nfs4_put_delegation(dp); |
453 | } | |
454 | ||
3bd64a5b BF |
455 | static void destroy_delegation(struct nfs4_delegation *dp) |
456 | { | |
457 | unhash_delegation(dp); | |
458 | remove_stid(&dp->dl_stid); | |
459 | nfs4_put_delegation(dp); | |
460 | } | |
461 | ||
462 | static void revoke_delegation(struct nfs4_delegation *dp) | |
463 | { | |
464 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
465 | ||
466 | if (clp->cl_minorversion == 0) | |
467 | destroy_delegation(dp); | |
468 | else { | |
469 | unhash_delegation(dp); | |
470 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; | |
471 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
472 | } | |
473 | } | |
474 | ||
1da177e4 LT |
475 | /* |
476 | * SETCLIENTID state | |
477 | */ | |
478 | ||
ddc04c41 BF |
479 | static unsigned int clientid_hashval(u32 id) |
480 | { | |
481 | return id & CLIENT_HASH_MASK; | |
482 | } | |
483 | ||
484 | static unsigned int clientstr_hashval(const char *name) | |
485 | { | |
486 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
487 | } | |
488 | ||
f9d7562f BF |
489 | /* |
490 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
491 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
492 | * only what share bits are currently in force, but also what | |
493 | * combinations of share bits previous opens have used. This allows us | |
494 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
495 | * return an error if the client attempt to downgrade to a combination | |
496 | * of share bits not explicable by closing some of its previous opens. | |
497 | * | |
498 | * XXX: This enforcement is actually incomplete, since we don't keep | |
499 | * track of access/deny bit combinations; so, e.g., we allow: | |
500 | * | |
501 | * OPEN allow read, deny write | |
502 | * OPEN allow both, deny none | |
503 | * DOWNGRADE allow read, deny none | |
504 | * | |
505 | * which we should reject. | |
506 | */ | |
5ae037e5 JL |
507 | static unsigned int |
508 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 509 | int i; |
5ae037e5 | 510 | unsigned int access = 0; |
f9d7562f | 511 | |
f9d7562f BF |
512 | for (i = 1; i < 4; i++) { |
513 | if (test_bit(i, &bmap)) | |
5ae037e5 | 514 | access |= i; |
f9d7562f | 515 | } |
5ae037e5 | 516 | return access; |
f9d7562f BF |
517 | } |
518 | ||
3a328614 | 519 | static bool |
dcef0413 | 520 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
521 | unsigned int access, deny; |
522 | ||
5ae037e5 JL |
523 | access = bmap_to_share_mode(stp->st_access_bmap); |
524 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 525 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
526 | return false; |
527 | return true; | |
f9d7562f BF |
528 | } |
529 | ||
82c5ff1b JL |
530 | /* set share access for a given stateid */ |
531 | static inline void | |
532 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
533 | { | |
534 | __set_bit(access, &stp->st_access_bmap); | |
535 | } | |
536 | ||
537 | /* clear share access for a given stateid */ | |
538 | static inline void | |
539 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
540 | { | |
541 | __clear_bit(access, &stp->st_access_bmap); | |
542 | } | |
543 | ||
544 | /* test whether a given stateid has access */ | |
545 | static inline bool | |
546 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
547 | { | |
548 | return test_bit(access, &stp->st_access_bmap); | |
549 | } | |
550 | ||
ce0fc43c JL |
551 | /* set share deny for a given stateid */ |
552 | static inline void | |
553 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
554 | { | |
555 | __set_bit(access, &stp->st_deny_bmap); | |
556 | } | |
557 | ||
558 | /* clear share deny for a given stateid */ | |
559 | static inline void | |
560 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
561 | { | |
562 | __clear_bit(access, &stp->st_deny_bmap); | |
563 | } | |
564 | ||
565 | /* test whether a given stateid is denying specific access */ | |
566 | static inline bool | |
567 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
568 | { | |
569 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
570 | } |
571 | ||
572 | static int nfs4_access_to_omode(u32 access) | |
573 | { | |
8f34a430 | 574 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
575 | case NFS4_SHARE_ACCESS_READ: |
576 | return O_RDONLY; | |
577 | case NFS4_SHARE_ACCESS_WRITE: | |
578 | return O_WRONLY; | |
579 | case NFS4_SHARE_ACCESS_BOTH: | |
580 | return O_RDWR; | |
581 | } | |
063b0fb9 BF |
582 | WARN_ON_ONCE(1); |
583 | return O_RDONLY; | |
f9d7562f BF |
584 | } |
585 | ||
82c5ff1b JL |
586 | /* release all access and file references for a given stateid */ |
587 | static void | |
588 | release_all_access(struct nfs4_ol_stateid *stp) | |
589 | { | |
590 | int i; | |
591 | ||
592 | for (i = 1; i < 4; i++) { | |
593 | if (test_access(i, stp)) | |
594 | nfs4_file_put_access(stp->st_file, | |
595 | nfs4_access_to_omode(i)); | |
596 | clear_access(i, stp); | |
597 | } | |
598 | } | |
599 | ||
dcef0413 | 600 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 601 | { |
529d7b2a BF |
602 | list_del(&stp->st_perfile); |
603 | list_del(&stp->st_perstateowner); | |
604 | } | |
605 | ||
dcef0413 | 606 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 607 | { |
82c5ff1b | 608 | release_all_access(stp); |
a96e5b90 | 609 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
610 | stp->st_file = NULL; |
611 | } | |
612 | ||
dcef0413 | 613 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 614 | { |
68a33961 BF |
615 | remove_stid(&stp->st_stid); |
616 | kmem_cache_free(stateid_slab, stp); | |
529d7b2a BF |
617 | } |
618 | ||
dcef0413 | 619 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
620 | { |
621 | struct file *file; | |
622 | ||
623 | unhash_generic_stateid(stp); | |
6136d2b4 | 624 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
625 | file = find_any_file(stp->st_file); |
626 | if (file) | |
fe0750e5 | 627 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 628 | close_generic_stateid(stp); |
529d7b2a BF |
629 | free_generic_stateid(stp); |
630 | } | |
631 | ||
fe0750e5 | 632 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 633 | { |
dcef0413 | 634 | struct nfs4_ol_stateid *stp; |
529d7b2a | 635 | |
fe0750e5 BF |
636 | list_del(&lo->lo_owner.so_strhash); |
637 | list_del(&lo->lo_perstateid); | |
009673b4 | 638 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
639 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
640 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 641 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
642 | release_lock_stateid(stp); |
643 | } | |
644 | } | |
645 | ||
fe0750e5 | 646 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 647 | { |
fe0750e5 BF |
648 | unhash_lockowner(lo); |
649 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
650 | } |
651 | ||
652 | static void | |
dcef0413 | 653 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 654 | { |
fe0750e5 | 655 | struct nfs4_lockowner *lo; |
529d7b2a BF |
656 | |
657 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
658 | lo = list_entry(open_stp->st_lockowners.next, |
659 | struct nfs4_lockowner, lo_perstateid); | |
660 | release_lockowner(lo); | |
529d7b2a BF |
661 | } |
662 | } | |
663 | ||
38c387b5 | 664 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
665 | { |
666 | unhash_generic_stateid(stp); | |
667 | release_stateid_lockowners(stp); | |
38c387b5 BF |
668 | close_generic_stateid(stp); |
669 | } | |
670 | ||
671 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
672 | { | |
673 | unhash_open_stateid(stp); | |
6136d2b4 | 674 | unhash_stid(&stp->st_stid); |
2283963f BF |
675 | free_generic_stateid(stp); |
676 | } | |
677 | ||
fe0750e5 | 678 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 679 | { |
dcef0413 | 680 | struct nfs4_ol_stateid *stp; |
f1d110ca | 681 | |
fe0750e5 BF |
682 | list_del(&oo->oo_owner.so_strhash); |
683 | list_del(&oo->oo_perclient); | |
684 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
685 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 686 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 687 | release_open_stateid(stp); |
f1d110ca BF |
688 | } |
689 | } | |
690 | ||
f7a4d872 BF |
691 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
692 | { | |
693 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
694 | ||
695 | if (s) { | |
6136d2b4 | 696 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
697 | free_generic_stateid(s); |
698 | oo->oo_last_closed_stid = NULL; | |
699 | } | |
700 | } | |
701 | ||
fe0750e5 | 702 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 703 | { |
fe0750e5 BF |
704 | unhash_openowner(oo); |
705 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 706 | release_last_closed_stateid(oo); |
fe0750e5 | 707 | nfs4_free_openowner(oo); |
f1d110ca BF |
708 | } |
709 | ||
5282fd72 ME |
710 | static inline int |
711 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
712 | { | |
713 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
714 | ||
715 | return sid->sequence % SESSION_HASH_SIZE; | |
716 | } | |
717 | ||
8f199b82 | 718 | #ifdef NFSD_DEBUG |
5282fd72 ME |
719 | static inline void |
720 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
721 | { | |
722 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
723 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
724 | } | |
8f199b82 TM |
725 | #else |
726 | static inline void | |
727 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
728 | { | |
729 | } | |
730 | #endif | |
731 | ||
9411b1d4 BF |
732 | /* |
733 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
734 | * won't be used for replay. | |
735 | */ | |
736 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
737 | { | |
738 | struct nfs4_stateowner *so = cstate->replay_owner; | |
739 | ||
740 | if (nfserr == nfserr_replay_me) | |
741 | return; | |
742 | ||
743 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
744 | cstate->replay_owner = NULL; | |
745 | return; | |
746 | } | |
747 | if (!so) | |
748 | return; | |
749 | if (so->so_is_open_owner) | |
750 | release_last_closed_stateid(openowner(so)); | |
751 | so->so_seqid++; | |
752 | return; | |
753 | } | |
5282fd72 | 754 | |
ec6b5d7b AA |
755 | static void |
756 | gen_sessionid(struct nfsd4_session *ses) | |
757 | { | |
758 | struct nfs4_client *clp = ses->se_client; | |
759 | struct nfsd4_sessionid *sid; | |
760 | ||
761 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
762 | sid->clientid = clp->cl_clientid; | |
763 | sid->sequence = current_sessionid++; | |
764 | sid->reserved = 0; | |
765 | } | |
766 | ||
767 | /* | |
a649637c AA |
768 | * The protocol defines ca_maxresponssize_cached to include the size of |
769 | * the rpc header, but all we need to cache is the data starting after | |
770 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
771 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
772 | * value that is the number of bytes in our cache plus a few additional | |
773 | * bytes. In order to stay on the safe side, and not promise more than | |
774 | * we can cache, those additional bytes must be the minimum possible: 24 | |
775 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
776 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
777 | * for the SEQUENCE op response: | |
778 | */ | |
779 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
780 | ||
557ce264 AA |
781 | static void |
782 | free_session_slots(struct nfsd4_session *ses) | |
783 | { | |
784 | int i; | |
785 | ||
786 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
787 | kfree(ses->se_slots[i]); | |
788 | } | |
789 | ||
a649637c | 790 | /* |
efe0cb6d BF |
791 | * We don't actually need to cache the rpc and session headers, so we |
792 | * can allocate a little less for each slot: | |
793 | */ | |
55c760cf | 794 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 795 | { |
55c760cf | 796 | u32 size; |
efe0cb6d | 797 | |
55c760cf BF |
798 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
799 | size = 0; | |
800 | else | |
801 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
802 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 803 | } |
ec6b5d7b | 804 | |
5b6feee9 BF |
805 | /* |
806 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 807 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 808 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 809 | */ |
55c760cf | 810 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
ec6b5d7b | 811 | { |
55c760cf BF |
812 | u32 slotsize = slot_bytes(ca); |
813 | u32 num = ca->maxreqs; | |
5b6feee9 | 814 | int avail; |
ec6b5d7b | 815 | |
5b6feee9 | 816 | spin_lock(&nfsd_drc_lock); |
697ce9be ZY |
817 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
818 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
5b6feee9 BF |
819 | num = min_t(int, num, avail / slotsize); |
820 | nfsd_drc_mem_used += num * slotsize; | |
821 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 822 | |
5b6feee9 BF |
823 | return num; |
824 | } | |
ec6b5d7b | 825 | |
55c760cf | 826 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 827 | { |
55c760cf BF |
828 | int slotsize = slot_bytes(ca); |
829 | ||
4bd9b0f4 | 830 | spin_lock(&nfsd_drc_lock); |
55c760cf | 831 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 832 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 833 | } |
ec6b5d7b | 834 | |
55c760cf | 835 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *attrs) |
5b6feee9 | 836 | { |
55c760cf BF |
837 | int numslots = attrs->maxreqs; |
838 | int slotsize = slot_bytes(attrs); | |
5b6feee9 BF |
839 | struct nfsd4_session *new; |
840 | int mem, i; | |
a649637c | 841 | |
5b6feee9 BF |
842 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
843 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
844 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 845 | |
5b6feee9 BF |
846 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
847 | if (!new) | |
848 | return NULL; | |
557ce264 | 849 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 850 | for (i = 0; i < numslots; i++) { |
55c760cf | 851 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 852 | if (!new->se_slots[i]) |
557ce264 | 853 | goto out_free; |
557ce264 | 854 | } |
5b6feee9 BF |
855 | return new; |
856 | out_free: | |
857 | while (i--) | |
858 | kfree(new->se_slots[i]); | |
859 | kfree(new); | |
860 | return NULL; | |
ec6b5d7b AA |
861 | } |
862 | ||
19cf5c02 BF |
863 | static void free_conn(struct nfsd4_conn *c) |
864 | { | |
865 | svc_xprt_put(c->cn_xprt); | |
866 | kfree(c); | |
867 | } | |
ec6b5d7b | 868 | |
19cf5c02 BF |
869 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
870 | { | |
871 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
872 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 873 | |
19cf5c02 BF |
874 | spin_lock(&clp->cl_lock); |
875 | if (!list_empty(&c->cn_persession)) { | |
876 | list_del(&c->cn_persession); | |
877 | free_conn(c); | |
878 | } | |
eea49806 | 879 | nfsd4_probe_callback(clp); |
2e4b7239 | 880 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 881 | } |
ec6b5d7b | 882 | |
d29c374c | 883 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 884 | { |
c7662518 | 885 | struct nfsd4_conn *conn; |
ec6b5d7b | 886 | |
c7662518 BF |
887 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
888 | if (!conn) | |
db90681d | 889 | return NULL; |
c7662518 BF |
890 | svc_xprt_get(rqstp->rq_xprt); |
891 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 892 | conn->cn_flags = flags; |
db90681d BF |
893 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
894 | return conn; | |
895 | } | |
a649637c | 896 | |
328ead28 BF |
897 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
898 | { | |
899 | conn->cn_session = ses; | |
900 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
901 | } |
902 | ||
db90681d | 903 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 904 | { |
db90681d | 905 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 906 | |
c7662518 | 907 | spin_lock(&clp->cl_lock); |
328ead28 | 908 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 909 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
910 | } |
911 | ||
21b75b01 | 912 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 913 | { |
19cf5c02 | 914 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 915 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
916 | } |
917 | ||
e1ff371f | 918 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 919 | { |
21b75b01 | 920 | int ret; |
ec6b5d7b | 921 | |
db90681d | 922 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
923 | ret = nfsd4_register_conn(conn); |
924 | if (ret) | |
925 | /* oops; xprt is already down: */ | |
926 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 927 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
928 | /* callback channel may be back up */ |
929 | nfsd4_probe_callback(ses->se_client); | |
930 | } | |
c7662518 | 931 | } |
ec6b5d7b | 932 | |
e1ff371f | 933 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
934 | { |
935 | u32 dir = NFS4_CDFC4_FORE; | |
936 | ||
e1ff371f | 937 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 938 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 939 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
940 | } |
941 | ||
942 | /* must be called under client_lock */ | |
19cf5c02 | 943 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 944 | { |
19cf5c02 BF |
945 | struct nfs4_client *clp = s->se_client; |
946 | struct nfsd4_conn *c; | |
ec6b5d7b | 947 | |
19cf5c02 BF |
948 | spin_lock(&clp->cl_lock); |
949 | while (!list_empty(&s->se_conns)) { | |
950 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
951 | list_del_init(&c->cn_persession); | |
952 | spin_unlock(&clp->cl_lock); | |
557ce264 | 953 | |
19cf5c02 BF |
954 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
955 | free_conn(c); | |
ec6b5d7b | 956 | |
19cf5c02 BF |
957 | spin_lock(&clp->cl_lock); |
958 | } | |
959 | spin_unlock(&clp->cl_lock); | |
c7662518 | 960 | } |
ec6b5d7b | 961 | |
1377b69e BF |
962 | static void __free_session(struct nfsd4_session *ses) |
963 | { | |
1377b69e BF |
964 | free_session_slots(ses); |
965 | kfree(ses); | |
966 | } | |
967 | ||
66b2b9b2 | 968 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 969 | { |
66b2b9b2 | 970 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
c9a49628 SK |
971 | |
972 | lockdep_assert_held(&nn->client_lock); | |
19cf5c02 | 973 | nfsd4_del_conns(ses); |
55c760cf | 974 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 975 | __free_session(ses); |
c7662518 BF |
976 | } |
977 | ||
135ae827 | 978 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 979 | { |
a827bcb2 | 980 | int idx; |
1872de0e | 981 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 982 | |
ec6b5d7b AA |
983 | new->se_client = clp; |
984 | gen_sessionid(new); | |
ec6b5d7b | 985 | |
c7662518 BF |
986 | INIT_LIST_HEAD(&new->se_conns); |
987 | ||
ac7c46f2 | 988 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 989 | new->se_flags = cses->flags; |
8b5ce5cd | 990 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 991 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 992 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 993 | idx = hash_sessionid(&new->se_sessionid); |
c9a49628 | 994 | spin_lock(&nn->client_lock); |
1872de0e | 995 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 996 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 997 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 998 | spin_unlock(&clp->cl_lock); |
c9a49628 | 999 | spin_unlock(&nn->client_lock); |
55c760cf BF |
1000 | memcpy(&new->se_fchannel, &cses->fore_channel, |
1001 | sizeof(struct nfsd4_channel_attrs)); | |
dcbeaa68 | 1002 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 1003 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1004 | /* |
1005 | * This is a little silly; with sessions there's no real | |
1006 | * use for the callback address. Use the peer address | |
1007 | * as a reasonable default for now, but consider fixing | |
1008 | * the rpc client not to require an address in the | |
1009 | * future: | |
1010 | */ | |
edd76786 BF |
1011 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1012 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1013 | } |
ec6b5d7b AA |
1014 | } |
1015 | ||
9089f1b4 | 1016 | /* caller must hold client_lock */ |
5282fd72 | 1017 | static struct nfsd4_session * |
1872de0e | 1018 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1019 | { |
1020 | struct nfsd4_session *elem; | |
1021 | int idx; | |
1872de0e | 1022 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 ME |
1023 | |
1024 | dump_sessionid(__func__, sessionid); | |
1025 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1026 | /* Search in the appropriate list */ |
1872de0e | 1027 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1028 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1029 | NFS4_MAX_SESSIONID_LEN)) { | |
1030 | return elem; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | dprintk("%s: session not found\n", __func__); | |
1035 | return NULL; | |
1036 | } | |
1037 | ||
9089f1b4 | 1038 | /* caller must hold client_lock */ |
7116ed6b | 1039 | static void |
5282fd72 | 1040 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1041 | { |
1042 | list_del(&ses->se_hash); | |
4c649378 | 1043 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1044 | list_del(&ses->se_perclnt); |
4c649378 | 1045 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1046 | } |
1047 | ||
1da177e4 LT |
1048 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1049 | static int | |
2c142baa | 1050 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1051 | { |
2c142baa | 1052 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1053 | return 0; |
60adfc50 | 1054 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1055 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1056 | return 1; |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * XXX Should we use a slab cache ? | |
1061 | * This type of memory management is somewhat inefficient, but we use it | |
1062 | * anyway since SETCLIENTID is not a common operation. | |
1063 | */ | |
35bba9a3 | 1064 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1065 | { |
1066 | struct nfs4_client *clp; | |
1067 | ||
35bba9a3 BF |
1068 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1069 | if (clp == NULL) | |
1070 | return NULL; | |
67114fe6 | 1071 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1072 | if (clp->cl_name.data == NULL) { |
1073 | kfree(clp); | |
1074 | return NULL; | |
1da177e4 | 1075 | } |
35bba9a3 | 1076 | clp->cl_name.len = name.len; |
1da177e4 LT |
1077 | return clp; |
1078 | } | |
1079 | ||
1080 | static inline void | |
1081 | free_client(struct nfs4_client *clp) | |
1082 | { | |
bca0ec65 | 1083 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
c9a49628 SK |
1084 | |
1085 | lockdep_assert_held(&nn->client_lock); | |
792c95dd BF |
1086 | while (!list_empty(&clp->cl_sessions)) { |
1087 | struct nfsd4_session *ses; | |
1088 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1089 | se_perclnt); | |
1090 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
1091 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
1092 | free_session(ses); | |
792c95dd | 1093 | } |
03a4e1f6 | 1094 | free_svc_cred(&clp->cl_cred); |
1da177e4 | 1095 | kfree(clp->cl_name.data); |
2d32b29a | 1096 | idr_destroy(&clp->cl_stateids); |
1da177e4 LT |
1097 | kfree(clp); |
1098 | } | |
1099 | ||
84d38ac9 BH |
1100 | /* must be called under the client_lock */ |
1101 | static inline void | |
1102 | unhash_client_locked(struct nfs4_client *clp) | |
1103 | { | |
792c95dd BF |
1104 | struct nfsd4_session *ses; |
1105 | ||
84d38ac9 | 1106 | list_del(&clp->cl_lru); |
4c649378 | 1107 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1108 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1109 | list_del_init(&ses->se_hash); | |
4c649378 | 1110 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1111 | } |
1112 | ||
1da177e4 | 1113 | static void |
0d22f68f | 1114 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1115 | { |
fe0750e5 | 1116 | struct nfs4_openowner *oo; |
1da177e4 | 1117 | struct nfs4_delegation *dp; |
1da177e4 | 1118 | struct list_head reaplist; |
382a62e7 | 1119 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1120 | |
1da177e4 LT |
1121 | INIT_LIST_HEAD(&reaplist); |
1122 | spin_lock(&recall_lock); | |
ea1da636 N |
1123 | while (!list_empty(&clp->cl_delegations)) { |
1124 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1125 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1126 | list_move(&dp->dl_recall_lru, &reaplist); |
1127 | } | |
1128 | spin_unlock(&recall_lock); | |
1129 | while (!list_empty(&reaplist)) { | |
1130 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 1131 | destroy_delegation(dp); |
1da177e4 | 1132 | } |
ea1da636 | 1133 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1134 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1135 | release_openowner(oo); | |
1da177e4 | 1136 | } |
6ff8da08 | 1137 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1138 | if (clp->cl_cb_conn.cb_xprt) |
1139 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1140 | list_del(&clp->cl_idhash); |
ac55fdc4 | 1141 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
382a62e7 | 1142 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
ac55fdc4 | 1143 | else |
a99454aa | 1144 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
c9a49628 | 1145 | spin_lock(&nn->client_lock); |
84d38ac9 | 1146 | unhash_client_locked(clp); |
221a6876 BF |
1147 | WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); |
1148 | free_client(clp); | |
c9a49628 | 1149 | spin_unlock(&nn->client_lock); |
1da177e4 LT |
1150 | } |
1151 | ||
0d22f68f BF |
1152 | static void expire_client(struct nfs4_client *clp) |
1153 | { | |
1154 | nfsd4_client_record_remove(clp); | |
1155 | destroy_client(clp); | |
1156 | } | |
1157 | ||
35bba9a3 BF |
1158 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1159 | { | |
1160 | memcpy(target->cl_verifier.data, source->data, | |
1161 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1162 | } |
1163 | ||
35bba9a3 BF |
1164 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1165 | { | |
1da177e4 LT |
1166 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1167 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1168 | } | |
1169 | ||
03a4e1f6 | 1170 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1171 | { |
03a4e1f6 BF |
1172 | if (source->cr_principal) { |
1173 | target->cr_principal = | |
1174 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1175 | if (target->cr_principal == NULL) | |
1176 | return -ENOMEM; | |
1177 | } else | |
1178 | target->cr_principal = NULL; | |
d5497fc6 | 1179 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1180 | target->cr_uid = source->cr_uid; |
1181 | target->cr_gid = source->cr_gid; | |
1182 | target->cr_group_info = source->cr_group_info; | |
1183 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
1184 | target->cr_gss_mech = source->cr_gss_mech; |
1185 | if (source->cr_gss_mech) | |
1186 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 1187 | return 0; |
1da177e4 LT |
1188 | } |
1189 | ||
ac55fdc4 JL |
1190 | static long long |
1191 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1192 | { | |
1193 | long long res; | |
1194 | ||
1195 | res = o1->len - o2->len; | |
1196 | if (res) | |
1197 | return res; | |
1198 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1199 | } | |
1200 | ||
35bba9a3 | 1201 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1202 | { |
a55370a3 | 1203 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1204 | } |
1205 | ||
1206 | static int | |
599e0a22 BF |
1207 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1208 | { | |
1209 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | static int | |
599e0a22 BF |
1213 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1214 | { | |
1215 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1216 | } |
1217 | ||
8fbba96e BF |
1218 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1219 | { | |
1220 | int i; | |
1221 | ||
1222 | if (g1->ngroups != g2->ngroups) | |
1223 | return false; | |
1224 | for (i=0; i<g1->ngroups; i++) | |
6fab8779 | 1225 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
8fbba96e BF |
1226 | return false; |
1227 | return true; | |
1228 | } | |
1229 | ||
68eb3508 BF |
1230 | /* |
1231 | * RFC 3530 language requires clid_inuse be returned when the | |
1232 | * "principal" associated with a requests differs from that previously | |
1233 | * used. We use uid, gid's, and gss principal string as our best | |
1234 | * approximation. We also don't want to allow non-gss use of a client | |
1235 | * established using gss: in theory cr_principal should catch that | |
1236 | * change, but in practice cr_principal can be null even in the gss case | |
1237 | * since gssd doesn't always pass down a principal string. | |
1238 | */ | |
1239 | static bool is_gss_cred(struct svc_cred *cr) | |
1240 | { | |
1241 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1242 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1243 | } | |
1244 | ||
1245 | ||
5559b50a | 1246 | static bool |
599e0a22 BF |
1247 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1248 | { | |
68eb3508 | 1249 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
1250 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
1251 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
1252 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
1253 | return false; | |
1254 | if (cr1->cr_principal == cr2->cr_principal) | |
1255 | return true; | |
1256 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1257 | return false; | |
5559b50a | 1258 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1259 | } |
1260 | ||
57266a6e BF |
1261 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
1262 | { | |
1263 | struct svc_cred *cr = &rqstp->rq_cred; | |
1264 | u32 service; | |
1265 | ||
1266 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); | |
1267 | return service == RPC_GSS_SVC_INTEGRITY || | |
1268 | service == RPC_GSS_SVC_PRIVACY; | |
1269 | } | |
1270 | ||
1271 | static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) | |
1272 | { | |
1273 | struct svc_cred *cr = &rqstp->rq_cred; | |
1274 | ||
1275 | if (!cl->cl_mach_cred) | |
1276 | return true; | |
1277 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
1278 | return false; | |
1279 | if (!svc_rqst_integrity_protected(rqstp)) | |
1280 | return false; | |
1281 | if (!cr->cr_principal) | |
1282 | return false; | |
1283 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
1284 | } | |
1285 | ||
c212cecf | 1286 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
5ec7b46c BF |
1287 | { |
1288 | static u32 current_clientid = 1; | |
1289 | ||
2c142baa | 1290 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1291 | clp->cl_clientid.cl_id = current_clientid++; |
1292 | } | |
1293 | ||
deda2faa BF |
1294 | static void gen_confirm(struct nfs4_client *clp) |
1295 | { | |
ab4684d1 | 1296 | __be32 verf[2]; |
deda2faa | 1297 | static u32 i; |
1da177e4 | 1298 | |
ab4684d1 CL |
1299 | verf[0] = (__be32)get_seconds(); |
1300 | verf[1] = (__be32)i++; | |
1301 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1302 | } |
1303 | ||
38c2f4b1 | 1304 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1305 | { |
3abdb607 BF |
1306 | struct nfs4_stid *ret; |
1307 | ||
1308 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
1309 | if (!ret || !ret->sc_type) | |
1310 | return NULL; | |
1311 | return ret; | |
4d71ab87 BF |
1312 | } |
1313 | ||
38c2f4b1 | 1314 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1315 | { |
1316 | struct nfs4_stid *s; | |
4d71ab87 | 1317 | |
38c2f4b1 | 1318 | s = find_stateid(cl, t); |
4d71ab87 BF |
1319 | if (!s) |
1320 | return NULL; | |
f459e453 | 1321 | if (typemask & s->sc_type) |
4581d140 | 1322 | return s; |
4581d140 BF |
1323 | return NULL; |
1324 | } | |
1325 | ||
2216d449 | 1326 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1327 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1328 | { | |
1329 | struct nfs4_client *clp; | |
1330 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1331 | int ret; |
c212cecf | 1332 | struct net *net = SVC_NET(rqstp); |
c9a49628 | 1333 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
1334 | |
1335 | clp = alloc_client(name); | |
1336 | if (clp == NULL) | |
1337 | return NULL; | |
1338 | ||
792c95dd | 1339 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1340 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1341 | if (ret) { | |
c9a49628 | 1342 | spin_lock(&nn->client_lock); |
03a4e1f6 | 1343 | free_client(clp); |
c9a49628 | 1344 | spin_unlock(&nn->client_lock); |
03a4e1f6 | 1345 | return NULL; |
b09333c4 | 1346 | } |
38c2f4b1 | 1347 | idr_init(&clp->cl_stateids); |
46583e25 | 1348 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1349 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1350 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1351 | INIT_LIST_HEAD(&clp->cl_openowners); |
1352 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1353 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1354 | INIT_LIST_HEAD(&clp->cl_callbacks); |
3bd64a5b | 1355 | INIT_LIST_HEAD(&clp->cl_revoked); |
6ff8da08 | 1356 | spin_lock_init(&clp->cl_lock); |
57725155 | 1357 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1358 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1359 | clear_bit(0, &clp->cl_cb_slot_busy); |
1360 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1361 | copy_verf(clp, verf); | |
1362 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1363 | gen_confirm(clp); |
edd76786 | 1364 | clp->cl_cb_session = NULL; |
c212cecf | 1365 | clp->net = net; |
b09333c4 RL |
1366 | return clp; |
1367 | } | |
1368 | ||
fd39ca9a | 1369 | static void |
ac55fdc4 JL |
1370 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1371 | { | |
1372 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1373 | struct nfs4_client *clp; | |
1374 | ||
1375 | while (*new) { | |
1376 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1377 | parent = *new; | |
1378 | ||
1379 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1380 | new = &((*new)->rb_left); | |
1381 | else | |
1382 | new = &((*new)->rb_right); | |
1383 | } | |
1384 | ||
1385 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1386 | rb_insert_color(&new_clp->cl_namenode, root); | |
1387 | } | |
1388 | ||
1389 | static struct nfs4_client * | |
1390 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1391 | { | |
1392 | long long cmp; | |
1393 | struct rb_node *node = root->rb_node; | |
1394 | struct nfs4_client *clp; | |
1395 | ||
1396 | while (node) { | |
1397 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1398 | cmp = compare_blob(&clp->cl_name, name); | |
1399 | if (cmp > 0) | |
1400 | node = node->rb_left; | |
1401 | else if (cmp < 0) | |
1402 | node = node->rb_right; | |
1403 | else | |
1404 | return clp; | |
1405 | } | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | static void | |
1410 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1411 | { |
1412 | unsigned int idhashval; | |
0a7ec377 | 1413 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 1414 | |
ac55fdc4 | 1415 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 1416 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 1417 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 1418 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
36acb66b | 1419 | renew_client(clp); |
1da177e4 LT |
1420 | } |
1421 | ||
fd39ca9a | 1422 | static void |
1da177e4 LT |
1423 | move_to_confirmed(struct nfs4_client *clp) |
1424 | { | |
1425 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 1426 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 LT |
1427 | |
1428 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
8daae4dc | 1429 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 1430 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 1431 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 1432 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1da177e4 LT |
1433 | renew_client(clp); |
1434 | } | |
1435 | ||
1436 | static struct nfs4_client * | |
bfa85e83 | 1437 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
1438 | { |
1439 | struct nfs4_client *clp; | |
1440 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1441 | ||
bfa85e83 | 1442 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 1443 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1444 | if ((bool)clp->cl_minorversion != sessions) |
1445 | return NULL; | |
a50d2ad1 | 1446 | renew_client(clp); |
1da177e4 | 1447 | return clp; |
a50d2ad1 | 1448 | } |
1da177e4 LT |
1449 | } |
1450 | return NULL; | |
1451 | } | |
1452 | ||
bfa85e83 BF |
1453 | static struct nfs4_client * |
1454 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
1455 | { | |
1456 | struct list_head *tbl = nn->conf_id_hashtbl; | |
1457 | ||
1458 | return find_client_in_id_table(tbl, clid, sessions); | |
1459 | } | |
1460 | ||
1da177e4 | 1461 | static struct nfs4_client * |
0a7ec377 | 1462 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 1463 | { |
bfa85e83 | 1464 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 1465 | |
bfa85e83 | 1466 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
1467 | } |
1468 | ||
6e5f15c9 | 1469 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1470 | { |
6e5f15c9 | 1471 | return clp->cl_exchange_flags != 0; |
e203d506 | 1472 | } |
a1bcecd2 | 1473 | |
28ce6054 | 1474 | static struct nfs4_client * |
382a62e7 | 1475 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1476 | { |
382a62e7 | 1477 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
1478 | } |
1479 | ||
1480 | static struct nfs4_client * | |
a99454aa | 1481 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 1482 | { |
a99454aa | 1483 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
1484 | } |
1485 | ||
fd39ca9a | 1486 | static void |
6f3d772f | 1487 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1488 | { |
07263f1e | 1489 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1490 | struct sockaddr *sa = svc_addr(rqstp); |
1491 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1492 | unsigned short expected_family; |
1493 | ||
1494 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1495 | if (se->se_callback_netid_len == 3 && | |
1496 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1497 | expected_family = AF_INET; | |
1498 | else if (se->se_callback_netid_len == 4 && | |
1499 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1500 | expected_family = AF_INET6; | |
1501 | else | |
1da177e4 LT |
1502 | goto out_err; |
1503 | ||
c212cecf | 1504 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 1505 | se->se_callback_addr_len, |
07263f1e BF |
1506 | (struct sockaddr *)&conn->cb_addr, |
1507 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1508 | |
07263f1e | 1509 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1510 | goto out_err; |
aa9a4ec7 | 1511 | |
07263f1e BF |
1512 | if (conn->cb_addr.ss_family == AF_INET6) |
1513 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1514 | |
07263f1e BF |
1515 | conn->cb_prog = se->se_callback_prog; |
1516 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1517 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1518 | return; |
1519 | out_err: | |
07263f1e BF |
1520 | conn->cb_addr.ss_family = AF_UNSPEC; |
1521 | conn->cb_addrlen = 0; | |
849823c5 | 1522 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1523 | "will not receive delegations\n", |
1524 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1525 | ||
1da177e4 LT |
1526 | return; |
1527 | } | |
1528 | ||
074fe897 | 1529 | /* |
557ce264 | 1530 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1531 | */ |
074fe897 AA |
1532 | void |
1533 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1534 | { |
557ce264 AA |
1535 | struct nfsd4_slot *slot = resp->cstate.slot; |
1536 | unsigned int base; | |
074fe897 | 1537 | |
557ce264 | 1538 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1539 | |
557ce264 AA |
1540 | slot->sl_opcnt = resp->opcnt; |
1541 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1542 | |
bf5c43c8 | 1543 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1544 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1545 | slot->sl_datalen = 0; |
bf864a31 | 1546 | return; |
074fe897 | 1547 | } |
557ce264 AA |
1548 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1549 | base = (char *)resp->cstate.datap - | |
1550 | (char *)resp->xbuf->head[0].iov_base; | |
1551 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1552 | slot->sl_datalen)) | |
1553 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1554 | return; | |
074fe897 AA |
1555 | } |
1556 | ||
1557 | /* | |
abfabf8c AA |
1558 | * Encode the replay sequence operation from the slot values. |
1559 | * If cachethis is FALSE encode the uncached rep error on the next | |
1560 | * operation which sets resp->p and increments resp->opcnt for | |
1561 | * nfs4svc_encode_compoundres. | |
074fe897 | 1562 | * |
074fe897 | 1563 | */ |
abfabf8c AA |
1564 | static __be32 |
1565 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1566 | struct nfsd4_compoundres *resp) | |
074fe897 | 1567 | { |
abfabf8c AA |
1568 | struct nfsd4_op *op; |
1569 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1570 | |
abfabf8c AA |
1571 | /* Encode the replayed sequence operation */ |
1572 | op = &args->ops[resp->opcnt - 1]; | |
1573 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1574 | |
abfabf8c | 1575 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1576 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1577 | op = &args->ops[resp->opcnt++]; |
1578 | op->status = nfserr_retry_uncached_rep; | |
1579 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1580 | } |
abfabf8c | 1581 | return op->status; |
074fe897 AA |
1582 | } |
1583 | ||
1584 | /* | |
557ce264 AA |
1585 | * The sequence operation is not cached because we can use the slot and |
1586 | * session values. | |
074fe897 AA |
1587 | */ |
1588 | __be32 | |
bf864a31 AA |
1589 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1590 | struct nfsd4_sequence *seq) | |
074fe897 | 1591 | { |
557ce264 | 1592 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1593 | __be32 status; |
1594 | ||
557ce264 | 1595 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1596 | |
abfabf8c AA |
1597 | /* Either returns 0 or nfserr_retry_uncached */ |
1598 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1599 | if (status == nfserr_retry_uncached_rep) | |
1600 | return status; | |
074fe897 | 1601 | |
557ce264 AA |
1602 | /* The sequence operation has been encoded, cstate->datap set. */ |
1603 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1604 | |
557ce264 AA |
1605 | resp->opcnt = slot->sl_opcnt; |
1606 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1607 | status = slot->sl_status; | |
074fe897 AA |
1608 | |
1609 | return status; | |
1610 | } | |
1611 | ||
0733d213 AA |
1612 | /* |
1613 | * Set the exchange_id flags returned by the server. | |
1614 | */ | |
1615 | static void | |
1616 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1617 | { | |
1618 | /* pNFS is not supported */ | |
1619 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1620 | ||
1621 | /* Referrals are supported, Migration is not. */ | |
1622 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1623 | ||
1624 | /* set the wire flags to return to client. */ | |
1625 | clid->flags = new->cl_exchange_flags; | |
1626 | } | |
1627 | ||
631fc9ea BF |
1628 | static bool client_has_state(struct nfs4_client *clp) |
1629 | { | |
1630 | /* | |
1631 | * Note clp->cl_openowners check isn't quite right: there's no | |
1632 | * need to count owners without stateid's. | |
1633 | * | |
1634 | * Also note we should probably be using this in 4.0 case too. | |
1635 | */ | |
6eccece9 BF |
1636 | return !list_empty(&clp->cl_openowners) |
1637 | || !list_empty(&clp->cl_delegations) | |
1638 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1639 | } |
1640 | ||
069b6ad4 AA |
1641 | __be32 |
1642 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1643 | struct nfsd4_compound_state *cstate, | |
1644 | struct nfsd4_exchange_id *exid) | |
1645 | { | |
0733d213 | 1646 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1647 | __be32 status; |
363168b4 | 1648 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1649 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1650 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1651 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 1652 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 1653 | |
363168b4 | 1654 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1655 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1656 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1657 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1658 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1659 | |
a084daf5 | 1660 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1661 | return nfserr_inval; |
1662 | ||
0733d213 | 1663 | switch (exid->spa_how) { |
57266a6e BF |
1664 | case SP4_MACH_CRED: |
1665 | if (!svc_rqst_integrity_protected(rqstp)) | |
1666 | return nfserr_inval; | |
0733d213 AA |
1667 | case SP4_NONE: |
1668 | break; | |
063b0fb9 BF |
1669 | default: /* checked by xdr code */ |
1670 | WARN_ON_ONCE(1); | |
0733d213 | 1671 | case SP4_SSV: |
dd30333c | 1672 | return nfserr_encr_alg_unsupp; |
0733d213 AA |
1673 | } |
1674 | ||
2dbb269d | 1675 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1676 | nfs4_lock_state(); |
382a62e7 | 1677 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 1678 | if (conf) { |
83e08fd4 BF |
1679 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1680 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1681 | ||
136e658d BF |
1682 | if (update) { |
1683 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1684 | status = nfserr_inval; |
1a308118 BF |
1685 | goto out; |
1686 | } | |
57266a6e BF |
1687 | if (!mach_creds_match(conf, rqstp)) { |
1688 | status = nfserr_wrong_cred; | |
1689 | goto out; | |
1690 | } | |
136e658d | 1691 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1692 | status = nfserr_perm; |
136e658d BF |
1693 | goto out; |
1694 | } | |
1695 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1696 | status = nfserr_not_same; |
1697 | goto out; | |
1698 | } | |
136e658d BF |
1699 | /* case 6 */ |
1700 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1701 | new = conf; | |
1702 | goto out_copy; | |
0733d213 | 1703 | } |
136e658d | 1704 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1705 | if (client_has_state(conf)) { |
1706 | status = nfserr_clid_inuse; | |
0733d213 AA |
1707 | goto out; |
1708 | } | |
1709 | expire_client(conf); | |
1710 | goto out_new; | |
1711 | } | |
136e658d | 1712 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1713 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1714 | new = conf; |
1715 | goto out_copy; | |
1716 | } | |
1717 | /* case 5, client reboot */ | |
136e658d | 1718 | goto out_new; |
6ddbbbfe MS |
1719 | } |
1720 | ||
2dbb269d | 1721 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1722 | status = nfserr_noent; |
1723 | goto out; | |
0733d213 AA |
1724 | } |
1725 | ||
a99454aa | 1726 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 1727 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1728 | expire_client(unconf); |
0733d213 | 1729 | |
2dbb269d | 1730 | /* case 1 (normal case) */ |
0733d213 | 1731 | out_new: |
2216d449 | 1732 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1733 | if (new == NULL) { |
4731030d | 1734 | status = nfserr_jukebox; |
0733d213 AA |
1735 | goto out; |
1736 | } | |
4f540e29 | 1737 | new->cl_minorversion = cstate->minorversion; |
57266a6e | 1738 | new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); |
0733d213 | 1739 | |
c212cecf | 1740 | gen_clid(new, nn); |
ac55fdc4 | 1741 | add_to_unconfirmed(new); |
0733d213 AA |
1742 | out_copy: |
1743 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1744 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1745 | ||
778df3f0 | 1746 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1747 | nfsd4_set_ex_flags(new, exid); |
1748 | ||
1749 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1750 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1751 | status = nfs_ok; |
1752 | ||
1753 | out: | |
1754 | nfs4_unlock_state(); | |
0733d213 | 1755 | return status; |
069b6ad4 AA |
1756 | } |
1757 | ||
57b7b43b | 1758 | static __be32 |
88e588d5 | 1759 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1760 | { |
88e588d5 AA |
1761 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1762 | slot_seqid); | |
b85d4c01 BH |
1763 | |
1764 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1765 | if (slot_inuse) { |
1766 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1767 | return nfserr_jukebox; |
1768 | else | |
1769 | return nfserr_seq_misordered; | |
1770 | } | |
f6d82485 | 1771 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1772 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1773 | return nfs_ok; |
88e588d5 | 1774 | if (seqid == slot_seqid) |
b85d4c01 | 1775 | return nfserr_replay_cache; |
b85d4c01 BH |
1776 | return nfserr_seq_misordered; |
1777 | } | |
1778 | ||
49557cc7 AA |
1779 | /* |
1780 | * Cache the create session result into the create session single DRC | |
1781 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1782 | * Do this for solo or embedded create session operations. | |
1783 | */ | |
1784 | static void | |
1785 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1786 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1787 | { |
1788 | slot->sl_status = nfserr; | |
1789 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1790 | } | |
1791 | ||
1792 | static __be32 | |
1793 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1794 | struct nfsd4_clid_slot *slot) | |
1795 | { | |
1796 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1797 | return slot->sl_status; | |
1798 | } | |
1799 | ||
1b74c25b MJ |
1800 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1801 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1802 | 1 + /* MIN tag is length with zero, only length */ \ | |
1803 | 3 + /* version, opcount, opcode */ \ | |
1804 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1805 | /* seqid, slotID, slotID, cache */ \ | |
1806 | 4 ) * sizeof(__be32)) | |
1807 | ||
1808 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1809 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1810 | 1 + /* status */ \ | |
1811 | 1 + /* MIN tag is length with zero, only length */ \ | |
1812 | 3 + /* opcount, opcode, opstatus*/ \ | |
1813 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1814 | /* seqid, slotID, slotID, slotID, status */ \ | |
1815 | 5 ) * sizeof(__be32)) | |
1816 | ||
55c760cf | 1817 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 1818 | { |
55c760cf BF |
1819 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
1820 | ||
373cd409 BF |
1821 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
1822 | return nfserr_toosmall; | |
1823 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
1824 | return nfserr_toosmall; | |
55c760cf BF |
1825 | ca->headerpadsz = 0; |
1826 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
1827 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
1828 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
1829 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
1830 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
1831 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
1832 | /* | |
1833 | * Note decreasing slot size below client's request may make it | |
1834 | * difficult for client to function correctly, whereas | |
1835 | * decreasing the number of slots will (just?) affect | |
1836 | * performance. When short on memory we therefore prefer to | |
1837 | * decrease number of slots instead of their size. Clients that | |
1838 | * request larger slots than they need will get poor results: | |
1839 | */ | |
1840 | ca->maxreqs = nfsd4_get_drc_mem(ca); | |
1841 | if (!ca->maxreqs) | |
1842 | return nfserr_jukebox; | |
1843 | ||
373cd409 | 1844 | return nfs_ok; |
1b74c25b MJ |
1845 | } |
1846 | ||
06b332a5 | 1847 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 1848 | { |
06b332a5 BF |
1849 | ca->headerpadsz = 0; |
1850 | ||
1851 | /* | |
1852 | * These RPC_MAX_HEADER macros are overkill, especially since we | |
1853 | * don't even do gss on the backchannel yet. But this is still | |
1854 | * less than 1k. Tighten up this estimate in the unlikely event | |
1855 | * it turns out to be a problem for some client: | |
1856 | */ | |
1857 | if (ca->maxreq_sz < NFS4_enc_cb_recall_sz + RPC_MAX_HEADER_WITH_AUTH) | |
1858 | return nfserr_toosmall; | |
1859 | if (ca->maxresp_sz < NFS4_dec_cb_recall_sz + RPC_MAX_REPHEADER_WITH_AUTH) | |
1860 | return nfserr_toosmall; | |
1861 | ca->maxresp_cached = 0; | |
1862 | if (ca->maxops < 2) | |
1863 | return nfserr_toosmall; | |
1864 | ||
1865 | return nfs_ok; | |
1b74c25b MJ |
1866 | } |
1867 | ||
b78724b7 BF |
1868 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
1869 | { | |
1870 | switch (cbs->flavor) { | |
1871 | case RPC_AUTH_NULL: | |
1872 | case RPC_AUTH_UNIX: | |
1873 | return nfs_ok; | |
1874 | default: | |
1875 | /* | |
1876 | * GSS case: the spec doesn't allow us to return this | |
1877 | * error. But it also doesn't allow us not to support | |
1878 | * GSS. | |
1879 | * I'd rather this fail hard than return some error the | |
1880 | * client might think it can already handle: | |
1881 | */ | |
1882 | return nfserr_encr_alg_unsupp; | |
1883 | } | |
1884 | } | |
1885 | ||
069b6ad4 AA |
1886 | __be32 |
1887 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1888 | struct nfsd4_compound_state *cstate, | |
1889 | struct nfsd4_create_session *cr_ses) | |
1890 | { | |
363168b4 | 1891 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1892 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1893 | struct nfsd4_session *new; |
81f0b2a4 | 1894 | struct nfsd4_conn *conn; |
49557cc7 | 1895 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1896 | __be32 status = 0; |
8daae4dc | 1897 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 1898 | |
a62573dc MJ |
1899 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1900 | return nfserr_inval; | |
b78724b7 BF |
1901 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
1902 | if (status) | |
1903 | return status; | |
55c760cf | 1904 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
1905 | if (status) |
1906 | return status; | |
1907 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 BF |
1908 | if (status) |
1909 | return status; | |
81f0b2a4 | 1910 | status = nfserr_jukebox; |
55c760cf BF |
1911 | new = alloc_session(&cr_ses->fore_channel); |
1912 | if (!new) | |
1913 | goto out_release_drc_mem; | |
81f0b2a4 BF |
1914 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
1915 | if (!conn) | |
1916 | goto out_free_session; | |
a62573dc | 1917 | |
ec6b5d7b | 1918 | nfs4_lock_state(); |
0a7ec377 | 1919 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 1920 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 1921 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
1922 | |
1923 | if (conf) { | |
57266a6e BF |
1924 | status = nfserr_wrong_cred; |
1925 | if (!mach_creds_match(conf, rqstp)) | |
1926 | goto out_free_conn; | |
49557cc7 AA |
1927 | cs_slot = &conf->cl_cs_slot; |
1928 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1929 | if (status == nfserr_replay_cache) { |
49557cc7 | 1930 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1931 | goto out_free_conn; |
49557cc7 | 1932 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1933 | status = nfserr_seq_misordered; |
81f0b2a4 | 1934 | goto out_free_conn; |
ec6b5d7b | 1935 | } |
ec6b5d7b | 1936 | } else if (unconf) { |
8f9d3d3b | 1937 | struct nfs4_client *old; |
ec6b5d7b | 1938 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1939 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1940 | status = nfserr_clid_inuse; |
81f0b2a4 | 1941 | goto out_free_conn; |
ec6b5d7b | 1942 | } |
57266a6e BF |
1943 | status = nfserr_wrong_cred; |
1944 | if (!mach_creds_match(unconf, rqstp)) | |
1945 | goto out_free_conn; | |
49557cc7 AA |
1946 | cs_slot = &unconf->cl_cs_slot; |
1947 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1948 | if (status) { |
1949 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1950 | status = nfserr_seq_misordered; |
81f0b2a4 | 1951 | goto out_free_conn; |
ec6b5d7b | 1952 | } |
382a62e7 | 1953 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
1954 | if (old) { |
1955 | status = mark_client_expired(old); | |
1956 | if (status) | |
1957 | goto out_free_conn; | |
8f9d3d3b | 1958 | expire_client(old); |
221a6876 | 1959 | } |
8f9d3d3b | 1960 | move_to_confirmed(unconf); |
ec6b5d7b AA |
1961 | conf = unconf; |
1962 | } else { | |
1963 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1964 | goto out_free_conn; |
ec6b5d7b | 1965 | } |
81f0b2a4 | 1966 | status = nfs_ok; |
408b79bc BF |
1967 | /* |
1968 | * We do not support RDMA or persistent sessions | |
1969 | */ | |
1970 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1971 | cr_ses->flags &= ~SESSION4_RDMA; | |
1972 | ||
81f0b2a4 BF |
1973 | init_session(rqstp, new, conf, cr_ses); |
1974 | nfsd4_init_conn(rqstp, conn, new); | |
1975 | ||
ac7c46f2 | 1976 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1977 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 1978 | cs_slot->sl_seqid++; |
49557cc7 | 1979 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1980 | |
49557cc7 AA |
1981 | /* cache solo and embedded create sessions under the state lock */ |
1982 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b | 1983 | nfs4_unlock_state(); |
ec6b5d7b | 1984 | return status; |
81f0b2a4 | 1985 | out_free_conn: |
266533c6 | 1986 | nfs4_unlock_state(); |
81f0b2a4 BF |
1987 | free_conn(conn); |
1988 | out_free_session: | |
1989 | __free_session(new); | |
55c760cf BF |
1990 | out_release_drc_mem: |
1991 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 1992 | return status; |
069b6ad4 AA |
1993 | } |
1994 | ||
1d1bc8f2 BF |
1995 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1996 | { | |
1997 | switch (*dir) { | |
1998 | case NFS4_CDFC4_FORE: | |
1999 | case NFS4_CDFC4_BACK: | |
2000 | return nfs_ok; | |
2001 | case NFS4_CDFC4_FORE_OR_BOTH: | |
2002 | case NFS4_CDFC4_BACK_OR_BOTH: | |
2003 | *dir = NFS4_CDFC4_BOTH; | |
2004 | return nfs_ok; | |
2005 | }; | |
2006 | return nfserr_inval; | |
2007 | } | |
2008 | ||
cb73a9f4 BF |
2009 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
2010 | { | |
2011 | struct nfsd4_session *session = cstate->session; | |
c9a49628 | 2012 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 2013 | __be32 status; |
cb73a9f4 | 2014 | |
b78724b7 BF |
2015 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
2016 | if (status) | |
2017 | return status; | |
c9a49628 | 2018 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
2019 | session->se_cb_prog = bc->bc_cb_program; |
2020 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 2021 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
2022 | |
2023 | nfsd4_probe_callback(session->se_client); | |
2024 | ||
2025 | return nfs_ok; | |
2026 | } | |
2027 | ||
1d1bc8f2 BF |
2028 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
2029 | struct nfsd4_compound_state *cstate, | |
2030 | struct nfsd4_bind_conn_to_session *bcts) | |
2031 | { | |
2032 | __be32 status; | |
3ba63671 | 2033 | struct nfsd4_conn *conn; |
4f6e6c17 | 2034 | struct nfsd4_session *session; |
c9a49628 | 2035 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1d1bc8f2 BF |
2036 | |
2037 | if (!nfsd4_last_compound_op(rqstp)) | |
2038 | return nfserr_not_only_op; | |
4f6e6c17 | 2039 | nfs4_lock_state(); |
c9a49628 | 2040 | spin_lock(&nn->client_lock); |
4f6e6c17 | 2041 | session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
c9a49628 | 2042 | spin_unlock(&nn->client_lock); |
4f6e6c17 BF |
2043 | status = nfserr_badsession; |
2044 | if (!session) | |
2045 | goto out; | |
57266a6e BF |
2046 | status = nfserr_wrong_cred; |
2047 | if (!mach_creds_match(session->se_client, rqstp)) | |
2048 | goto out; | |
1d1bc8f2 | 2049 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 2050 | if (status) |
4f6e6c17 | 2051 | goto out; |
3ba63671 | 2052 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 2053 | status = nfserr_jukebox; |
3ba63671 | 2054 | if (!conn) |
4f6e6c17 BF |
2055 | goto out; |
2056 | nfsd4_init_conn(rqstp, conn, session); | |
2057 | status = nfs_ok; | |
2058 | out: | |
2059 | nfs4_unlock_state(); | |
2060 | return status; | |
1d1bc8f2 BF |
2061 | } |
2062 | ||
5d4cec2f BF |
2063 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
2064 | { | |
2065 | if (!session) | |
2066 | return 0; | |
2067 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
2068 | } | |
2069 | ||
069b6ad4 AA |
2070 | __be32 |
2071 | nfsd4_destroy_session(struct svc_rqst *r, | |
2072 | struct nfsd4_compound_state *cstate, | |
2073 | struct nfsd4_destroy_session *sessionid) | |
2074 | { | |
e10e0cfc | 2075 | struct nfsd4_session *ses; |
abcdff09 | 2076 | __be32 status; |
c9a49628 | 2077 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
e10e0cfc | 2078 | |
abcdff09 BF |
2079 | nfs4_lock_state(); |
2080 | status = nfserr_not_only_op; | |
5d4cec2f | 2081 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 | 2082 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 2083 | goto out; |
57716355 | 2084 | } |
e10e0cfc | 2085 | dump_sessionid(__func__, &sessionid->sessionid); |
c9a49628 | 2086 | spin_lock(&nn->client_lock); |
1872de0e | 2087 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
abcdff09 BF |
2088 | status = nfserr_badsession; |
2089 | if (!ses) | |
2090 | goto out_client_lock; | |
57266a6e BF |
2091 | status = nfserr_wrong_cred; |
2092 | if (!mach_creds_match(ses->se_client, r)) | |
2093 | goto out_client_lock; | |
66b2b9b2 BF |
2094 | status = mark_session_dead_locked(ses); |
2095 | if (status) | |
2096 | goto out_client_lock; | |
e10e0cfc | 2097 | unhash_session(ses); |
c9a49628 | 2098 | spin_unlock(&nn->client_lock); |
e10e0cfc | 2099 | |
84f5f7cc | 2100 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 2101 | |
c9a49628 | 2102 | spin_lock(&nn->client_lock); |
66b2b9b2 | 2103 | free_session(ses); |
e10e0cfc | 2104 | status = nfs_ok; |
abcdff09 BF |
2105 | out_client_lock: |
2106 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 2107 | out: |
abcdff09 | 2108 | nfs4_unlock_state(); |
e10e0cfc | 2109 | return status; |
069b6ad4 AA |
2110 | } |
2111 | ||
a663bdd8 | 2112 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
2113 | { |
2114 | struct nfsd4_conn *c; | |
2115 | ||
2116 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2117 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2118 | return c; |
2119 | } | |
2120 | } | |
2121 | return NULL; | |
2122 | } | |
2123 | ||
57266a6e | 2124 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2125 | { |
2126 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2127 | struct nfsd4_conn *c; |
57266a6e | 2128 | __be32 status = nfs_ok; |
21b75b01 | 2129 | int ret; |
328ead28 BF |
2130 | |
2131 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2132 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
2133 | if (c) |
2134 | goto out_free; | |
2135 | status = nfserr_conn_not_bound_to_session; | |
2136 | if (clp->cl_mach_cred) | |
2137 | goto out_free; | |
328ead28 BF |
2138 | __nfsd4_hash_conn(new, ses); |
2139 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2140 | ret = nfsd4_register_conn(new); |
2141 | if (ret) | |
2142 | /* oops; xprt is already down: */ | |
2143 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
2144 | return nfs_ok; |
2145 | out_free: | |
2146 | spin_unlock(&clp->cl_lock); | |
2147 | free_conn(new); | |
2148 | return status; | |
328ead28 BF |
2149 | } |
2150 | ||
868b89c3 MJ |
2151 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2152 | { | |
2153 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2154 | ||
2155 | return args->opcnt > session->se_fchannel.maxops; | |
2156 | } | |
2157 | ||
ae82a8d0 MJ |
2158 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2159 | struct nfsd4_session *session) | |
2160 | { | |
2161 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2162 | ||
2163 | return xb->len > session->se_fchannel.maxreq_sz; | |
2164 | } | |
2165 | ||
069b6ad4 | 2166 | __be32 |
b85d4c01 | 2167 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2168 | struct nfsd4_compound_state *cstate, |
2169 | struct nfsd4_sequence *seq) | |
2170 | { | |
f9bb94c4 | 2171 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 | 2172 | struct nfsd4_session *session; |
221a6876 | 2173 | struct nfs4_client *clp; |
b85d4c01 | 2174 | struct nfsd4_slot *slot; |
a663bdd8 | 2175 | struct nfsd4_conn *conn; |
57b7b43b | 2176 | __be32 status; |
c9a49628 | 2177 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b85d4c01 | 2178 | |
f9bb94c4 AA |
2179 | if (resp->opcnt != 1) |
2180 | return nfserr_sequence_pos; | |
2181 | ||
a663bdd8 BF |
2182 | /* |
2183 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2184 | * below. | |
2185 | */ | |
2186 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2187 | if (!conn) | |
2188 | return nfserr_jukebox; | |
2189 | ||
c9a49628 | 2190 | spin_lock(&nn->client_lock); |
b85d4c01 | 2191 | status = nfserr_badsession; |
1872de0e | 2192 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
b85d4c01 | 2193 | if (!session) |
221a6876 BF |
2194 | goto out_no_session; |
2195 | clp = session->se_client; | |
2196 | status = get_client_locked(clp); | |
2197 | if (status) | |
2198 | goto out_no_session; | |
66b2b9b2 BF |
2199 | status = nfsd4_get_session_locked(session); |
2200 | if (status) | |
2201 | goto out_put_client; | |
b85d4c01 | 2202 | |
868b89c3 MJ |
2203 | status = nfserr_too_many_ops; |
2204 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 2205 | goto out_put_session; |
868b89c3 | 2206 | |
ae82a8d0 MJ |
2207 | status = nfserr_req_too_big; |
2208 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 2209 | goto out_put_session; |
ae82a8d0 | 2210 | |
b85d4c01 | 2211 | status = nfserr_badslot; |
6c18ba9f | 2212 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 2213 | goto out_put_session; |
b85d4c01 | 2214 | |
557ce264 | 2215 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2216 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2217 | ||
a8dfdaeb AA |
2218 | /* We do not negotiate the number of slots yet, so set the |
2219 | * maxslots to the session maxreqs which is used to encode | |
2220 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2221 | seq->maxslots = session->se_fchannel.maxreqs; | |
2222 | ||
73e79482 BF |
2223 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2224 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2225 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2226 | status = nfserr_seq_misordered; |
2227 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 2228 | goto out_put_session; |
b85d4c01 BH |
2229 | cstate->slot = slot; |
2230 | cstate->session = session; | |
da3846a2 | 2231 | /* Return the cached reply status and set cstate->status |
557ce264 | 2232 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2233 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2234 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2235 | goto out; |
b85d4c01 BH |
2236 | } |
2237 | if (status) | |
66b2b9b2 | 2238 | goto out_put_session; |
b85d4c01 | 2239 | |
57266a6e | 2240 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 2241 | conn = NULL; |
57266a6e BF |
2242 | if (status) |
2243 | goto out_put_session; | |
328ead28 | 2244 | |
b85d4c01 | 2245 | /* Success! bump slot seqid */ |
b85d4c01 | 2246 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2247 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2248 | if (seq->cachethis) |
2249 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2250 | else |
2251 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2252 | |
2253 | cstate->slot = slot; | |
2254 | cstate->session = session; | |
2255 | ||
b85d4c01 | 2256 | out: |
221a6876 BF |
2257 | switch (clp->cl_cb_state) { |
2258 | case NFSD4_CB_DOWN: | |
2259 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
2260 | break; | |
2261 | case NFSD4_CB_FAULT: | |
2262 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
2263 | break; | |
2264 | default: | |
2265 | seq->status_flags = 0; | |
aaf84eb9 | 2266 | } |
3bd64a5b BF |
2267 | if (!list_empty(&clp->cl_revoked)) |
2268 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 2269 | out_no_session: |
a663bdd8 | 2270 | kfree(conn); |
c9a49628 | 2271 | spin_unlock(&nn->client_lock); |
b85d4c01 | 2272 | return status; |
66b2b9b2 BF |
2273 | out_put_session: |
2274 | nfsd4_put_session(session); | |
221a6876 BF |
2275 | out_put_client: |
2276 | put_client_renew_locked(clp); | |
2277 | goto out_no_session; | |
069b6ad4 AA |
2278 | } |
2279 | ||
345c2842 MJ |
2280 | __be32 |
2281 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2282 | { | |
2283 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2284 | __be32 status = 0; |
8daae4dc | 2285 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 MJ |
2286 | |
2287 | nfs4_lock_state(); | |
0a7ec377 | 2288 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 2289 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 2290 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
2291 | |
2292 | if (conf) { | |
2293 | clp = conf; | |
2294 | ||
c0293b01 | 2295 | if (client_has_state(conf)) { |
345c2842 MJ |
2296 | status = nfserr_clientid_busy; |
2297 | goto out; | |
2298 | } | |
2299 | } else if (unconf) | |
2300 | clp = unconf; | |
2301 | else { | |
2302 | status = nfserr_stale_clientid; | |
2303 | goto out; | |
2304 | } | |
57266a6e BF |
2305 | if (!mach_creds_match(clp, rqstp)) { |
2306 | status = nfserr_wrong_cred; | |
2307 | goto out; | |
2308 | } | |
345c2842 MJ |
2309 | expire_client(clp); |
2310 | out: | |
2311 | nfs4_unlock_state(); | |
345c2842 MJ |
2312 | return status; |
2313 | } | |
2314 | ||
4dc6ec00 BF |
2315 | __be32 |
2316 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2317 | { | |
57b7b43b | 2318 | __be32 status = 0; |
bcecf1cc | 2319 | |
4dc6ec00 BF |
2320 | if (rc->rca_one_fs) { |
2321 | if (!cstate->current_fh.fh_dentry) | |
2322 | return nfserr_nofilehandle; | |
2323 | /* | |
2324 | * We don't take advantage of the rca_one_fs case. | |
2325 | * That's OK, it's optional, we can safely ignore it. | |
2326 | */ | |
2327 | return nfs_ok; | |
2328 | } | |
bcecf1cc | 2329 | |
4dc6ec00 | 2330 | nfs4_lock_state(); |
bcecf1cc | 2331 | status = nfserr_complete_already; |
a52d726b JL |
2332 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2333 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2334 | goto out; |
2335 | ||
2336 | status = nfserr_stale_clientid; | |
2337 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2338 | /* |
2339 | * The following error isn't really legal. | |
2340 | * But we only get here if the client just explicitly | |
2341 | * destroyed the client. Surely it no longer cares what | |
2342 | * error it gets back on an operation for the dead | |
2343 | * client. | |
2344 | */ | |
bcecf1cc MJ |
2345 | goto out; |
2346 | ||
2347 | status = nfs_ok; | |
2a4317c5 | 2348 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2349 | out: |
4dc6ec00 | 2350 | nfs4_unlock_state(); |
bcecf1cc | 2351 | return status; |
4dc6ec00 BF |
2352 | } |
2353 | ||
b37ad28b | 2354 | __be32 |
b591480b BF |
2355 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2356 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2357 | { |
a084daf5 | 2358 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2359 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2360 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2361 | __be32 status; |
c212cecf SK |
2362 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
2363 | ||
63db4632 | 2364 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2365 | nfs4_lock_state(); |
382a62e7 | 2366 | conf = find_confirmed_client_by_name(&clname, nn); |
28ce6054 | 2367 | if (conf) { |
63db4632 | 2368 | /* case 0: */ |
1da177e4 | 2369 | status = nfserr_clid_inuse; |
e203d506 BF |
2370 | if (clp_used_exchangeid(conf)) |
2371 | goto out; | |
026722c2 | 2372 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2373 | char addr_str[INET6_ADDRSTRLEN]; |
2374 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2375 | sizeof(addr_str)); | |
2376 | dprintk("NFSD: setclientid: string in use by client " | |
2377 | "at %s\n", addr_str); | |
1da177e4 LT |
2378 | goto out; |
2379 | } | |
1da177e4 | 2380 | } |
a99454aa | 2381 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 BF |
2382 | if (unconf) |
2383 | expire_client(unconf); | |
3e772463 | 2384 | status = nfserr_jukebox; |
2216d449 | 2385 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2386 | if (new == NULL) |
2387 | goto out; | |
34b232bb | 2388 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2389 | /* case 1: probable callback update */ |
1da177e4 | 2390 | copy_clid(new, conf); |
34b232bb | 2391 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
c212cecf | 2392 | gen_clid(new, nn); |
8323c3b2 | 2393 | new->cl_minorversion = 0; |
6f3d772f | 2394 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2395 | add_to_unconfirmed(new); |
1da177e4 LT |
2396 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2397 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2398 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2399 | status = nfs_ok; | |
2400 | out: | |
2401 | nfs4_unlock_state(); | |
2402 | return status; | |
2403 | } | |
2404 | ||
2405 | ||
b37ad28b | 2406 | __be32 |
b591480b BF |
2407 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2408 | struct nfsd4_compound_state *cstate, | |
2409 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2410 | { |
21ab45a4 | 2411 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2412 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2413 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2414 | __be32 status; |
7f2210fa | 2415 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2416 | |
2c142baa | 2417 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2418 | return nfserr_stale_clientid; |
1da177e4 | 2419 | nfs4_lock_state(); |
21ab45a4 | 2420 | |
8daae4dc | 2421 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 2422 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 2423 | /* |
8695b90a BF |
2424 | * We try hard to give out unique clientid's, so if we get an |
2425 | * attempt to confirm the same clientid with a different cred, | |
2426 | * there's a bug somewhere. Let's charitably assume it's our | |
2427 | * bug. | |
a186e767 | 2428 | */ |
8695b90a BF |
2429 | status = nfserr_serverfault; |
2430 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2431 | goto out; | |
2432 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2433 | goto out; | |
63db4632 | 2434 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2435 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2436 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2437 | status = nfs_ok; |
90d700b7 BF |
2438 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2439 | status = nfserr_stale_clientid; | |
2440 | goto out; | |
2441 | } | |
2442 | status = nfs_ok; | |
2443 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2444 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2445 | nfsd4_probe_callback(conf); | |
2446 | expire_client(unconf); | |
90d700b7 | 2447 | } else { /* case 3: normal case; new or rebooted client */ |
382a62e7 | 2448 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 BF |
2449 | if (conf) { |
2450 | status = mark_client_expired(conf); | |
2451 | if (status) | |
2452 | goto out; | |
8695b90a | 2453 | expire_client(conf); |
221a6876 | 2454 | } |
8695b90a | 2455 | move_to_confirmed(unconf); |
f3d03b92 | 2456 | nfsd4_probe_callback(unconf); |
08e8987c | 2457 | } |
1da177e4 | 2458 | out: |
1da177e4 LT |
2459 | nfs4_unlock_state(); |
2460 | return status; | |
2461 | } | |
2462 | ||
32513b40 BF |
2463 | static struct nfs4_file *nfsd4_alloc_file(void) |
2464 | { | |
2465 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2466 | } | |
2467 | ||
1da177e4 | 2468 | /* OPEN Share state helper functions */ |
32513b40 | 2469 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2470 | { |
1da177e4 LT |
2471 | unsigned int hashval = file_hashval(ino); |
2472 | ||
32513b40 | 2473 | atomic_set(&fp->fi_ref, 1); |
32513b40 BF |
2474 | INIT_LIST_HEAD(&fp->fi_stateids); |
2475 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2476 | fp->fi_inode = igrab(ino); | |
2477 | fp->fi_had_conflict = false; | |
2478 | fp->fi_lease = NULL; | |
2479 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2480 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2481 | spin_lock(&recall_lock); | |
89876f8c | 2482 | hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); |
32513b40 | 2483 | spin_unlock(&recall_lock); |
1da177e4 LT |
2484 | } |
2485 | ||
e60d4398 | 2486 | static void |
e18b890b | 2487 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2488 | { |
e60d4398 N |
2489 | if (*slab == NULL) |
2490 | return; | |
1a1d92c1 | 2491 | kmem_cache_destroy(*slab); |
e60d4398 | 2492 | *slab = NULL; |
1da177e4 LT |
2493 | } |
2494 | ||
e8ff2a84 | 2495 | void |
1da177e4 LT |
2496 | nfsd4_free_slabs(void) |
2497 | { | |
fe0750e5 BF |
2498 | nfsd4_free_slab(&openowner_slab); |
2499 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2500 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2501 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2502 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2503 | } |
1da177e4 | 2504 | |
72083396 | 2505 | int |
e60d4398 N |
2506 | nfsd4_init_slabs(void) |
2507 | { | |
fe0750e5 BF |
2508 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2509 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2510 | if (openowner_slab == NULL) | |
2511 | goto out_nomem; | |
2512 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2513 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2514 | if (lockowner_slab == NULL) |
e60d4398 N |
2515 | goto out_nomem; |
2516 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2517 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2518 | if (file_slab == NULL) |
2519 | goto out_nomem; | |
5ac049ac | 2520 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2521 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2522 | if (stateid_slab == NULL) |
2523 | goto out_nomem; | |
5b2d21c1 | 2524 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2525 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2526 | if (deleg_slab == NULL) |
2527 | goto out_nomem; | |
e60d4398 N |
2528 | return 0; |
2529 | out_nomem: | |
2530 | nfsd4_free_slabs(); | |
2531 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2532 | return -ENOMEM; | |
1da177e4 LT |
2533 | } |
2534 | ||
fe0750e5 BF |
2535 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2536 | { | |
2537 | kfree(oo->oo_owner.so_owner.data); | |
2538 | kmem_cache_free(openowner_slab, oo); | |
2539 | } | |
2540 | ||
2541 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2542 | { |
fe0750e5 BF |
2543 | kfree(lo->lo_owner.so_owner.data); |
2544 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2545 | } |
2546 | ||
ff194bd9 | 2547 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2548 | { |
ff194bd9 BF |
2549 | rp->rp_status = nfserr_serverfault; |
2550 | rp->rp_buflen = 0; | |
2551 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2552 | } |
2553 | ||
fe0750e5 | 2554 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2555 | { |
1da177e4 | 2556 | struct nfs4_stateowner *sop; |
1da177e4 | 2557 | |
fe0750e5 | 2558 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2559 | if (!sop) |
2560 | return NULL; | |
2561 | ||
2562 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2563 | if (!sop->so_owner.data) { | |
fe0750e5 | 2564 | kmem_cache_free(slab, sop); |
1da177e4 | 2565 | return NULL; |
ff194bd9 BF |
2566 | } |
2567 | sop->so_owner.len = owner->len; | |
2568 | ||
ea1da636 | 2569 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2570 | sop->so_client = clp; |
2571 | init_nfs4_replay(&sop->so_replay); | |
2572 | return sop; | |
2573 | } | |
2574 | ||
fe0750e5 | 2575 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2576 | { |
9b531137 SK |
2577 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2578 | ||
2579 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 2580 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2581 | } |
2582 | ||
fe0750e5 | 2583 | static struct nfs4_openowner * |
ff194bd9 | 2584 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2585 | struct nfs4_openowner *oo; |
ff194bd9 | 2586 | |
fe0750e5 BF |
2587 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2588 | if (!oo) | |
ff194bd9 | 2589 | return NULL; |
fe0750e5 BF |
2590 | oo->oo_owner.so_is_open_owner = 1; |
2591 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2592 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2593 | oo->oo_time = 0; |
38c387b5 | 2594 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2595 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2596 | hash_openowner(oo, clp, strhashval); | |
2597 | return oo; | |
1da177e4 LT |
2598 | } |
2599 | ||
996e0938 | 2600 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2601 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2602 | |
3abdb607 | 2603 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
ea1da636 | 2604 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2605 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2606 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2607 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2608 | get_nfs4_file(fp); |
1da177e4 | 2609 | stp->st_file = fp; |
1da177e4 LT |
2610 | stp->st_access_bmap = 0; |
2611 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2612 | set_access(open->op_share_access, stp); |
ce0fc43c | 2613 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2614 | stp->st_openstp = NULL; |
1da177e4 LT |
2615 | } |
2616 | ||
fd39ca9a | 2617 | static void |
73758fed | 2618 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
1da177e4 | 2619 | { |
73758fed SK |
2620 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2621 | ||
fe0750e5 | 2622 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2623 | |
73758fed | 2624 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
fe0750e5 | 2625 | oo->oo_time = get_seconds(); |
1da177e4 LT |
2626 | } |
2627 | ||
1da177e4 | 2628 | static int |
599e0a22 BF |
2629 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2630 | clientid_t *clid) | |
2631 | { | |
2632 | return (sop->so_owner.len == owner->len) && | |
2633 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2634 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2635 | } |
2636 | ||
fe0750e5 | 2637 | static struct nfs4_openowner * |
9b531137 SK |
2638 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
2639 | bool sessions, struct nfsd_net *nn) | |
1da177e4 | 2640 | { |
a50d2ad1 BF |
2641 | struct nfs4_stateowner *so; |
2642 | struct nfs4_openowner *oo; | |
d15c077e | 2643 | struct nfs4_client *clp; |
1da177e4 | 2644 | |
9b531137 | 2645 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
2646 | if (!so->so_is_open_owner) |
2647 | continue; | |
a50d2ad1 BF |
2648 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2649 | oo = openowner(so); | |
d15c077e BF |
2650 | clp = oo->oo_owner.so_client; |
2651 | if ((bool)clp->cl_minorversion != sessions) | |
2652 | return NULL; | |
a50d2ad1 BF |
2653 | renew_client(oo->oo_owner.so_client); |
2654 | return oo; | |
2655 | } | |
1da177e4 LT |
2656 | } |
2657 | return NULL; | |
2658 | } | |
2659 | ||
2660 | /* search file_hashtbl[] for file */ | |
2661 | static struct nfs4_file * | |
2662 | find_file(struct inode *ino) | |
2663 | { | |
2664 | unsigned int hashval = file_hashval(ino); | |
2665 | struct nfs4_file *fp; | |
2666 | ||
8b671b80 | 2667 | spin_lock(&recall_lock); |
89876f8c | 2668 | hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2669 | if (fp->fi_inode == ino) { |
2670 | get_nfs4_file(fp); | |
8b671b80 | 2671 | spin_unlock(&recall_lock); |
1da177e4 | 2672 | return fp; |
13cd2184 | 2673 | } |
1da177e4 | 2674 | } |
8b671b80 | 2675 | spin_unlock(&recall_lock); |
1da177e4 LT |
2676 | return NULL; |
2677 | } | |
2678 | ||
1da177e4 LT |
2679 | /* |
2680 | * Called to check deny when READ with all zero stateid or | |
2681 | * WRITE with all zero or all one stateid | |
2682 | */ | |
b37ad28b | 2683 | static __be32 |
1da177e4 LT |
2684 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2685 | { | |
2686 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2687 | struct nfs4_file *fp; | |
dcef0413 | 2688 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2689 | __be32 ret; |
1da177e4 | 2690 | |
1da177e4 | 2691 | fp = find_file(ino); |
13cd2184 N |
2692 | if (!fp) |
2693 | return nfs_ok; | |
b700949b | 2694 | ret = nfserr_locked; |
1da177e4 | 2695 | /* Search for conflicting share reservations */ |
13cd2184 | 2696 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2697 | if (test_deny(deny_type, stp) || |
2698 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2699 | goto out; |
1da177e4 | 2700 | } |
13cd2184 N |
2701 | ret = nfs_ok; |
2702 | out: | |
2703 | put_nfs4_file(fp); | |
2704 | return ret; | |
1da177e4 LT |
2705 | } |
2706 | ||
6b57d9c8 | 2707 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2708 | { |
e8c69d17 BF |
2709 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
2710 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2711 | ||
1da177e4 LT |
2712 | /* We're assuming the state code never drops its reference |
2713 | * without first removing the lease. Since we're in this lease | |
2714 | * callback (and since the lease code is serialized by the kernel | |
2715 | * lock) we know the server hasn't removed the lease yet, we know | |
2716 | * it's safe to take a reference: */ | |
2717 | atomic_inc(&dp->dl_count); | |
2718 | ||
e8c69d17 | 2719 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
1da177e4 | 2720 | |
460781b5 | 2721 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2722 | dp->dl_time = get_seconds(); |
2723 | ||
6b57d9c8 BF |
2724 | nfsd4_cb_recall(dp); |
2725 | } | |
2726 | ||
acfdf5c3 | 2727 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2728 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2729 | { | |
acfdf5c3 BF |
2730 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2731 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2732 | |
7fa10cd1 BF |
2733 | if (!fp) { |
2734 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2735 | return; | |
2736 | } | |
2737 | if (fp->fi_had_conflict) { | |
2738 | WARN(1, "duplicate break on %p\n", fp); | |
2739 | return; | |
2740 | } | |
0272e1fd BF |
2741 | /* |
2742 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2743 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2744 | * in time: |
0272e1fd BF |
2745 | */ |
2746 | fl->fl_break_time = 0; | |
1da177e4 | 2747 | |
5d926e8c | 2748 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2749 | fp->fi_had_conflict = true; |
2750 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2751 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2752 | spin_unlock(&recall_lock); |
1da177e4 LT |
2753 | } |
2754 | ||
1da177e4 LT |
2755 | static |
2756 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2757 | { | |
2758 | if (arg & F_UNLCK) | |
2759 | return lease_modify(onlist, arg); | |
2760 | else | |
2761 | return -EAGAIN; | |
2762 | } | |
2763 | ||
7b021967 | 2764 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2765 | .lm_break = nfsd_break_deleg_cb, |
2766 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2767 | }; |
2768 | ||
7a8711c9 BF |
2769 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2770 | { | |
2771 | if (nfsd4_has_session(cstate)) | |
2772 | return nfs_ok; | |
2773 | if (seqid == so->so_seqid - 1) | |
2774 | return nfserr_replay_me; | |
2775 | if (seqid == so->so_seqid) | |
2776 | return nfs_ok; | |
2777 | return nfserr_bad_seqid; | |
2778 | } | |
1da177e4 | 2779 | |
b37ad28b | 2780 | __be32 |
6668958f | 2781 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 2782 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 2783 | { |
1da177e4 LT |
2784 | clientid_t *clientid = &open->op_clientid; |
2785 | struct nfs4_client *clp = NULL; | |
2786 | unsigned int strhashval; | |
fe0750e5 | 2787 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2788 | __be32 status; |
1da177e4 | 2789 | |
2c142baa | 2790 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2791 | return nfserr_stale_clientid; |
32513b40 BF |
2792 | /* |
2793 | * In case we need it later, after we've already created the | |
2794 | * file and don't want to risk a further failure: | |
2795 | */ | |
2796 | open->op_file = nfsd4_alloc_file(); | |
2797 | if (open->op_file == NULL) | |
2798 | return nfserr_jukebox; | |
1da177e4 | 2799 | |
16bfdaaf | 2800 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
9b531137 | 2801 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
fe0750e5 BF |
2802 | open->op_openowner = oo; |
2803 | if (!oo) { | |
8daae4dc SK |
2804 | clp = find_confirmed_client(clientid, cstate->minorversion, |
2805 | nn); | |
1da177e4 | 2806 | if (clp == NULL) |
0f442aa2 | 2807 | return nfserr_expired; |
bcf130f9 | 2808 | goto new_owner; |
1da177e4 | 2809 | } |
dad1c067 | 2810 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2811 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2812 | clp = oo->oo_owner.so_client; |
2813 | release_openowner(oo); | |
2814 | open->op_openowner = NULL; | |
bcf130f9 | 2815 | goto new_owner; |
0f442aa2 | 2816 | } |
4cdc951b BF |
2817 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2818 | if (status) | |
2819 | return status; | |
2820 | clp = oo->oo_owner.so_client; | |
2821 | goto alloc_stateid; | |
bcf130f9 BF |
2822 | new_owner: |
2823 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2824 | if (oo == NULL) | |
2825 | return nfserr_jukebox; | |
2826 | open->op_openowner = oo; | |
4cdc951b BF |
2827 | alloc_stateid: |
2828 | open->op_stp = nfs4_alloc_stateid(clp); | |
2829 | if (!open->op_stp) | |
2830 | return nfserr_jukebox; | |
0f442aa2 | 2831 | return nfs_ok; |
1da177e4 LT |
2832 | } |
2833 | ||
b37ad28b | 2834 | static inline __be32 |
4a6e43e6 N |
2835 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2836 | { | |
2837 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2838 | return nfserr_openmode; | |
2839 | else | |
2840 | return nfs_ok; | |
2841 | } | |
2842 | ||
f459e453 | 2843 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2844 | { |
f459e453 | 2845 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2846 | } |
2847 | ||
38c2f4b1 | 2848 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2849 | { |
f459e453 | 2850 | struct nfs4_stid *ret; |
24a0111e | 2851 | |
38c2f4b1 | 2852 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2853 | if (!ret) |
2854 | return NULL; | |
2855 | return delegstateid(ret); | |
24a0111e BF |
2856 | } |
2857 | ||
8b289b2c BF |
2858 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2859 | { | |
2860 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2861 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2862 | } | |
2863 | ||
b37ad28b | 2864 | static __be32 |
41d22663 | 2865 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
2866 | struct nfs4_delegation **dp) |
2867 | { | |
2868 | int flags; | |
b37ad28b | 2869 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2870 | |
38c2f4b1 | 2871 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2872 | if (*dp == NULL) |
c44c5eeb | 2873 | goto out; |
24a0111e | 2874 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2875 | status = nfs4_check_delegmode(*dp, flags); |
2876 | if (status) | |
2877 | *dp = NULL; | |
c44c5eeb | 2878 | out: |
8b289b2c | 2879 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2880 | return nfs_ok; |
2881 | if (status) | |
2882 | return status; | |
dad1c067 | 2883 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2884 | return nfs_ok; |
567d9829 N |
2885 | } |
2886 | ||
b37ad28b | 2887 | static __be32 |
dcef0413 | 2888 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2889 | { |
dcef0413 | 2890 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2891 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2892 | |
8beefa24 | 2893 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2894 | /* ignore lock owners */ |
2895 | if (local->st_stateowner->so_is_open_owner == 0) | |
2896 | continue; | |
2897 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2898 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2899 | *stpp = local; |
2900 | /* check for conflicting share reservations */ | |
2901 | if (!test_share(local, open)) | |
77eaae8d | 2902 | return nfserr_share_denied; |
1da177e4 | 2903 | } |
77eaae8d | 2904 | return nfs_ok; |
1da177e4 LT |
2905 | } |
2906 | ||
21fb4016 BF |
2907 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2908 | { | |
2909 | int flags = 0; | |
2910 | ||
2911 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2912 | flags |= NFSD_MAY_READ; | |
2913 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2914 | flags |= NFSD_MAY_WRITE; | |
2915 | return flags; | |
2916 | } | |
2917 | ||
0c12eaff CB |
2918 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2919 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2920 | { |
2921 | __be32 status; | |
0c12eaff CB |
2922 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2923 | int access = nfs4_access_to_access(open->op_share_access); | |
2924 | ||
f9d7562f BF |
2925 | if (!fp->fi_fds[oflag]) { |
2926 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2927 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2928 | if (status) |
2929 | return status; | |
2930 | } | |
2931 | nfs4_file_get_access(fp, oflag); | |
2932 | ||
2933 | return nfs_ok; | |
2934 | } | |
2935 | ||
b37ad28b | 2936 | static inline __be32 |
1da177e4 LT |
2937 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2938 | struct nfsd4_open *open) | |
2939 | { | |
2940 | struct iattr iattr = { | |
2941 | .ia_valid = ATTR_SIZE, | |
2942 | .ia_size = 0, | |
2943 | }; | |
2944 | if (!open->op_truncate) | |
2945 | return 0; | |
2946 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2947 | return nfserr_inval; |
1da177e4 LT |
2948 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2949 | } | |
2950 | ||
b37ad28b | 2951 | static __be32 |
dcef0413 | 2952 | 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 | 2953 | { |
b6d2f1ca | 2954 | u32 op_share_access = open->op_share_access; |
7d947842 | 2955 | bool new_access; |
b37ad28b | 2956 | __be32 status; |
1da177e4 | 2957 | |
82c5ff1b | 2958 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2959 | if (new_access) { |
0c12eaff | 2960 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2961 | if (status) |
2962 | return status; | |
6c26d08f | 2963 | } |
1da177e4 LT |
2964 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2965 | if (status) { | |
f9d7562f | 2966 | if (new_access) { |
f197c271 | 2967 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2968 | nfs4_file_put_access(fp, oflag); |
2969 | } | |
1da177e4 LT |
2970 | return status; |
2971 | } | |
2972 | /* remember the open */ | |
82c5ff1b | 2973 | set_access(op_share_access, stp); |
ce0fc43c | 2974 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2975 | |
2976 | return nfs_ok; | |
2977 | } | |
2978 | ||
2979 | ||
1da177e4 | 2980 | static void |
1255a8f3 | 2981 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2982 | { |
dad1c067 | 2983 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2984 | } |
2985 | ||
14a24e99 BF |
2986 | /* Should we give out recallable state?: */ |
2987 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2988 | { | |
2989 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2990 | return true; | |
2991 | /* | |
2992 | * In the sessions case, since we don't have to establish a | |
2993 | * separate connection for callbacks, we assume it's OK | |
2994 | * until we hear otherwise: | |
2995 | */ | |
2996 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2997 | } | |
2998 | ||
22d38c4c BF |
2999 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
3000 | { | |
3001 | struct file_lock *fl; | |
3002 | ||
3003 | fl = locks_alloc_lock(); | |
3004 | if (!fl) | |
3005 | return NULL; | |
3006 | locks_init_lock(fl); | |
3007 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
3008 | fl->fl_flags = FL_LEASE; | |
3009 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
3010 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 3011 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 3012 | fl->fl_pid = current->tgid; |
22d38c4c BF |
3013 | return fl; |
3014 | } | |
3015 | ||
99c41515 | 3016 | static int nfs4_setlease(struct nfs4_delegation *dp) |
edab9782 | 3017 | { |
acfdf5c3 | 3018 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
3019 | struct file_lock *fl; |
3020 | int status; | |
3021 | ||
99c41515 | 3022 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); |
edab9782 BF |
3023 | if (!fl) |
3024 | return -ENOMEM; | |
acfdf5c3 | 3025 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 3026 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 3027 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 3028 | if (status) { |
acfdf5c3 | 3029 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
3030 | locks_free_lock(fl); |
3031 | return -ENOMEM; | |
3032 | } | |
acfdf5c3 | 3033 | fp->fi_lease = fl; |
cb0942b8 | 3034 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
3035 | atomic_set(&fp->fi_delegees, 1); |
3036 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3037 | return 0; | |
3038 | } | |
3039 | ||
99c41515 | 3040 | static int nfs4_set_delegation(struct nfs4_delegation *dp) |
acfdf5c3 BF |
3041 | { |
3042 | struct nfs4_file *fp = dp->dl_file; | |
3043 | ||
3044 | if (!fp->fi_lease) | |
99c41515 | 3045 | return nfs4_setlease(dp); |
acfdf5c3 BF |
3046 | spin_lock(&recall_lock); |
3047 | if (fp->fi_had_conflict) { | |
3048 | spin_unlock(&recall_lock); | |
3049 | return -EAGAIN; | |
3050 | } | |
3051 | atomic_inc(&fp->fi_delegees); | |
3052 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
3053 | spin_unlock(&recall_lock); | |
2a74aba7 | 3054 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
3055 | return 0; |
3056 | } | |
3057 | ||
4aa8913c BH |
3058 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
3059 | { | |
3060 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3061 | if (status == -EAGAIN) | |
3062 | open->op_why_no_deleg = WND4_CONTENTION; | |
3063 | else { | |
3064 | open->op_why_no_deleg = WND4_RESOURCE; | |
3065 | switch (open->op_deleg_want) { | |
3066 | case NFS4_SHARE_WANT_READ_DELEG: | |
3067 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
3068 | case NFS4_SHARE_WANT_ANY_DELEG: | |
3069 | break; | |
3070 | case NFS4_SHARE_WANT_CANCEL: | |
3071 | open->op_why_no_deleg = WND4_CANCELLED; | |
3072 | break; | |
3073 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 3074 | WARN_ON_ONCE(1); |
4aa8913c BH |
3075 | } |
3076 | } | |
3077 | } | |
3078 | ||
1da177e4 LT |
3079 | /* |
3080 | * Attempt to hand out a delegation. | |
99c41515 BF |
3081 | * |
3082 | * Note we don't support write delegations, and won't until the vfs has | |
3083 | * proper support for them. | |
1da177e4 LT |
3084 | */ |
3085 | static void | |
5ccb0066 SK |
3086 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
3087 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
3088 | { |
3089 | struct nfs4_delegation *dp; | |
fe0750e5 | 3090 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 3091 | int cb_up; |
99c41515 | 3092 | int status = 0; |
1da177e4 | 3093 | |
fe0750e5 | 3094 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
3095 | open->op_recall = 0; |
3096 | switch (open->op_claim_type) { | |
3097 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 3098 | if (!cb_up) |
7b190fec | 3099 | open->op_recall = 1; |
99c41515 BF |
3100 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
3101 | goto out_no_deleg; | |
7b190fec N |
3102 | break; |
3103 | case NFS4_OPEN_CLAIM_NULL: | |
99c41515 BF |
3104 | /* |
3105 | * Let's not give out any delegations till everyone's | |
3106 | * had the chance to reclaim theirs.... | |
3107 | */ | |
5ccb0066 | 3108 | if (locks_in_grace(net)) |
99c41515 | 3109 | goto out_no_deleg; |
dad1c067 | 3110 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 3111 | goto out_no_deleg; |
9a0590ae SD |
3112 | /* |
3113 | * Also, if the file was opened for write or | |
3114 | * create, there's a good chance the client's | |
3115 | * about to write to it, resulting in an | |
3116 | * immediate recall (since we don't support | |
3117 | * write delegations): | |
3118 | */ | |
7b190fec | 3119 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
3120 | goto out_no_deleg; |
3121 | if (open->op_create == NFS4_OPEN_CREATE) | |
3122 | goto out_no_deleg; | |
7b190fec N |
3123 | break; |
3124 | default: | |
99c41515 | 3125 | goto out_no_deleg; |
7b190fec | 3126 | } |
99c41515 | 3127 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); |
dd239cc0 BF |
3128 | if (dp == NULL) |
3129 | goto out_no_deleg; | |
99c41515 | 3130 | status = nfs4_set_delegation(dp); |
edab9782 | 3131 | if (status) |
dd239cc0 | 3132 | goto out_free; |
1da177e4 | 3133 | |
d5477a8d | 3134 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 3135 | |
8c10cbdb | 3136 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 3137 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 3138 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
dd239cc0 BF |
3139 | return; |
3140 | out_free: | |
24ffb938 | 3141 | unhash_stid(&dp->dl_stid); |
acfdf5c3 | 3142 | nfs4_put_delegation(dp); |
dd239cc0 | 3143 | out_no_deleg: |
99c41515 BF |
3144 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
3145 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
3146 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
3147 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
3148 | ||
3149 | /* 4.1 client asking for a delegation? */ | |
3150 | if (open->op_deleg_want) | |
3151 | nfsd4_open_deleg_none_ext(open, status); | |
3152 | return; | |
1da177e4 LT |
3153 | } |
3154 | ||
e27f49c3 BH |
3155 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3156 | struct nfs4_delegation *dp) | |
3157 | { | |
3158 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3159 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3160 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3161 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3162 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3163 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3164 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3165 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3166 | } | |
3167 | /* Otherwise the client must be confused wanting a delegation | |
3168 | * it already has, therefore we don't return | |
3169 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3170 | */ | |
3171 | } | |
3172 | ||
1da177e4 LT |
3173 | /* |
3174 | * called with nfs4_lock_state() held. | |
3175 | */ | |
b37ad28b | 3176 | __be32 |
1da177e4 LT |
3177 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3178 | { | |
6668958f | 3179 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3180 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3181 | struct nfs4_file *fp = NULL; |
3182 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3183 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3184 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3185 | __be32 status; |
1da177e4 | 3186 | |
1da177e4 LT |
3187 | /* |
3188 | * Lookup file; if found, lookup stateid and check open request, | |
3189 | * and check for delegations in the process of being recalled. | |
3190 | * If not found, create the nfs4_file struct | |
3191 | */ | |
3192 | fp = find_file(ino); | |
3193 | if (fp) { | |
3194 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3195 | goto out; | |
41d22663 | 3196 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
3197 | if (status) |
3198 | goto out; | |
1da177e4 | 3199 | } else { |
c44c5eeb | 3200 | status = nfserr_bad_stateid; |
8b289b2c | 3201 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3202 | goto out; |
3e772463 | 3203 | status = nfserr_jukebox; |
32513b40 BF |
3204 | fp = open->op_file; |
3205 | open->op_file = NULL; | |
3206 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3207 | } |
3208 | ||
3209 | /* | |
3210 | * OPEN the file, or upgrade an existing OPEN. | |
3211 | * If truncate fails, the OPEN fails. | |
3212 | */ | |
3213 | if (stp) { | |
3214 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3215 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3216 | if (status) |
3217 | goto out; | |
3218 | } else { | |
4cdc951b | 3219 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3220 | if (status) |
3221 | goto out; | |
3222 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3223 | if (status) |
1da177e4 | 3224 | goto out; |
4cdc951b BF |
3225 | stp = open->op_stp; |
3226 | open->op_stp = NULL; | |
996e0938 | 3227 | init_open_stateid(stp, fp, open); |
1da177e4 | 3228 | } |
dcef0413 BF |
3229 | update_stateid(&stp->st_stid.sc_stateid); |
3230 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3231 | |
d24433cd | 3232 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3233 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3234 | |
d24433cd BH |
3235 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3236 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3237 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3238 | goto nodeleg; | |
3239 | } | |
3240 | } | |
3241 | ||
1da177e4 LT |
3242 | /* |
3243 | * Attempt to hand out a delegation. No error return, because the | |
3244 | * OPEN succeeds even if we fail. | |
3245 | */ | |
5ccb0066 | 3246 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3247 | nodeleg: |
1da177e4 LT |
3248 | status = nfs_ok; |
3249 | ||
8c10cbdb | 3250 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3251 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3252 | out: |
d24433cd BH |
3253 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3254 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3255 | open->op_deleg_want) |
3256 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3257 | |
13cd2184 N |
3258 | if (fp) |
3259 | put_nfs4_file(fp); | |
37515177 | 3260 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3261 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3262 | /* |
3263 | * To finish the open response, we just need to set the rflags. | |
3264 | */ | |
3265 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3266 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3267 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3268 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3269 | ||
3270 | return status; | |
3271 | } | |
3272 | ||
d29b20cd BF |
3273 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3274 | { | |
3275 | if (open->op_openowner) { | |
3276 | struct nfs4_openowner *oo = open->op_openowner; | |
3277 | ||
3278 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3279 | list_del_init(&oo->oo_close_lru); | |
3280 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3281 | if (status) { | |
3282 | release_openowner(oo); | |
3283 | open->op_openowner = NULL; | |
3284 | } else | |
3285 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3286 | } | |
3287 | } | |
32513b40 BF |
3288 | if (open->op_file) |
3289 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3290 | if (open->op_stp) |
ef79859e | 3291 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3292 | } |
3293 | ||
9b2ef62b BF |
3294 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
3295 | { | |
3296 | struct nfs4_client *found; | |
3297 | ||
3298 | if (STALE_CLIENTID(clid, nn)) | |
3299 | return nfserr_stale_clientid; | |
3300 | found = find_confirmed_client(clid, session, nn); | |
3301 | if (clp) | |
3302 | *clp = found; | |
3303 | return found ? nfs_ok : nfserr_expired; | |
3304 | } | |
3305 | ||
b37ad28b | 3306 | __be32 |
b591480b BF |
3307 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3308 | clientid_t *clid) | |
1da177e4 LT |
3309 | { |
3310 | struct nfs4_client *clp; | |
b37ad28b | 3311 | __be32 status; |
7f2210fa | 3312 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3313 | |
3314 | nfs4_lock_state(); | |
3315 | dprintk("process_renew(%08x/%08x): starting\n", | |
3316 | clid->cl_boot, clid->cl_id); | |
9b2ef62b BF |
3317 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
3318 | if (status) | |
1da177e4 | 3319 | goto out; |
1da177e4 | 3320 | status = nfserr_cb_path_down; |
ea1da636 | 3321 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3322 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3323 | goto out; |
3324 | status = nfs_ok; | |
3325 | out: | |
3326 | nfs4_unlock_state(); | |
3327 | return status; | |
3328 | } | |
3329 | ||
a76b4319 | 3330 | static void |
12760c66 | 3331 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 3332 | { |
33dcc481 | 3333 | /* do nothing if grace period already ended */ |
a51c84ed | 3334 | if (nn->grace_ended) |
33dcc481 JL |
3335 | return; |
3336 | ||
a76b4319 | 3337 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3338 | nn->grace_ended = true; |
12760c66 | 3339 | nfsd4_record_grace_done(nn, nn->boot_time); |
5e1533c7 | 3340 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3341 | /* |
3342 | * Now that every NFSv4 client has had the chance to recover and | |
3343 | * to see the (possibly new, possibly shorter) lease time, we | |
3344 | * can safely set the next grace time to the current lease time: | |
3345 | */ | |
5284b44e | 3346 | nn->nfsd4_grace = nn->nfsd4_lease; |
a76b4319 N |
3347 | } |
3348 | ||
fd39ca9a | 3349 | static time_t |
09121281 | 3350 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
3351 | { |
3352 | struct nfs4_client *clp; | |
fe0750e5 | 3353 | struct nfs4_openowner *oo; |
1da177e4 LT |
3354 | struct nfs4_delegation *dp; |
3355 | struct list_head *pos, *next, reaplist; | |
3d733711 SK |
3356 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
3357 | time_t t, clientid_val = nn->nfsd4_lease; | |
3358 | time_t u, test_val = nn->nfsd4_lease; | |
1da177e4 LT |
3359 | |
3360 | nfs4_lock_state(); | |
3361 | ||
3362 | dprintk("NFSD: laundromat service - starting\n"); | |
12760c66 | 3363 | nfsd4_end_grace(nn); |
36acb66b | 3364 | INIT_LIST_HEAD(&reaplist); |
c9a49628 | 3365 | spin_lock(&nn->client_lock); |
5ed58bb2 | 3366 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 LT |
3367 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
3368 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3369 | t = clp->cl_time - cutoff; | |
3370 | if (clientid_val > t) | |
3371 | clientid_val = t; | |
3372 | break; | |
3373 | } | |
221a6876 | 3374 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
3375 | dprintk("NFSD: client in use (clientid %08x)\n", |
3376 | clp->cl_clientid.cl_id); | |
3377 | continue; | |
3378 | } | |
221a6876 | 3379 | list_move(&clp->cl_lru, &reaplist); |
36acb66b | 3380 | } |
c9a49628 | 3381 | spin_unlock(&nn->client_lock); |
36acb66b BH |
3382 | list_for_each_safe(pos, next, &reaplist) { |
3383 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3384 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3385 | clp->cl_clientid.cl_id); | |
3386 | expire_client(clp); | |
3387 | } | |
1da177e4 | 3388 | spin_lock(&recall_lock); |
e8c69d17 | 3389 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 3390 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
4e37a7c2 SK |
3391 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
3392 | continue; | |
1da177e4 LT |
3393 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
3394 | u = dp->dl_time - cutoff; | |
3395 | if (test_val > u) | |
3396 | test_val = u; | |
3397 | break; | |
3398 | } | |
1da177e4 LT |
3399 | list_move(&dp->dl_recall_lru, &reaplist); |
3400 | } | |
3401 | spin_unlock(&recall_lock); | |
3402 | list_for_each_safe(pos, next, &reaplist) { | |
3403 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 3404 | revoke_delegation(dp); |
1da177e4 | 3405 | } |
3d733711 | 3406 | test_val = nn->nfsd4_lease; |
73758fed | 3407 | list_for_each_safe(pos, next, &nn->close_lru) { |
fe0750e5 BF |
3408 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3409 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3410 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3411 | if (test_val > u) |
3412 | test_val = u; | |
3413 | break; | |
3414 | } | |
fe0750e5 | 3415 | release_openowner(oo); |
1da177e4 LT |
3416 | } |
3417 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3418 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3419 | nfs4_unlock_state(); | |
3420 | return clientid_val; | |
3421 | } | |
3422 | ||
a254b246 HH |
3423 | static struct workqueue_struct *laundry_wq; |
3424 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
3425 | |
3426 | static void | |
09121281 | 3427 | laundromat_main(struct work_struct *laundry) |
1da177e4 LT |
3428 | { |
3429 | time_t t; | |
09121281 SK |
3430 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
3431 | work); | |
3432 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, | |
3433 | laundromat_work); | |
1da177e4 | 3434 | |
09121281 | 3435 | t = nfs4_laundromat(nn); |
1da177e4 | 3436 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
09121281 | 3437 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
3438 | } |
3439 | ||
f7a4d872 | 3440 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3441 | { |
f7a4d872 BF |
3442 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3443 | return nfserr_bad_stateid; | |
3444 | return nfs_ok; | |
1da177e4 LT |
3445 | } |
3446 | ||
1da177e4 | 3447 | static inline int |
82c5ff1b | 3448 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3449 | { |
82c5ff1b JL |
3450 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3451 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3452 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3453 | } |
3454 | ||
3455 | static inline int | |
82c5ff1b | 3456 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3457 | { |
82c5ff1b JL |
3458 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3459 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3460 | } |
3461 | ||
3462 | static | |
dcef0413 | 3463 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3464 | { |
b37ad28b | 3465 | __be32 status = nfserr_openmode; |
1da177e4 | 3466 | |
02921914 BF |
3467 | /* For lock stateid's, we test the parent open, not the lock: */ |
3468 | if (stp->st_openstp) | |
3469 | stp = stp->st_openstp; | |
82c5ff1b | 3470 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3471 | goto out; |
82c5ff1b | 3472 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3473 | goto out; |
3474 | status = nfs_ok; | |
3475 | out: | |
3476 | return status; | |
3477 | } | |
3478 | ||
b37ad28b | 3479 | static inline __be32 |
5ccb0066 | 3480 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3481 | { |
203a8c8e | 3482 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3483 | return nfs_ok; |
5ccb0066 | 3484 | else if (locks_in_grace(net)) { |
25985edc | 3485 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3486 | * conflicting state; so we must wait out the grace period. */ |
3487 | return nfserr_grace; | |
3488 | } else if (flags & WR_STATE) | |
3489 | return nfs4_share_conflict(current_fh, | |
3490 | NFS4_SHARE_DENY_WRITE); | |
3491 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3492 | return nfs4_share_conflict(current_fh, | |
3493 | NFS4_SHARE_DENY_READ); | |
3494 | } | |
3495 | ||
3496 | /* | |
3497 | * Allow READ/WRITE during grace period on recovered state only for files | |
3498 | * that are not able to provide mandatory locking. | |
3499 | */ | |
3500 | static inline int | |
5ccb0066 | 3501 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3502 | { |
5ccb0066 | 3503 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3504 | } |
3505 | ||
81b82965 BF |
3506 | /* Returns true iff a is later than b: */ |
3507 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3508 | { | |
1a9357f4 | 3509 | return (s32)(a->si_generation - b->si_generation) > 0; |
81b82965 BF |
3510 | } |
3511 | ||
57b7b43b | 3512 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3513 | { |
6668958f AA |
3514 | /* |
3515 | * When sessions are used the stateid generation number is ignored | |
3516 | * when it is zero. | |
3517 | */ | |
28dde241 | 3518 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3519 | return nfs_ok; |
3520 | ||
3521 | if (in->si_generation == ref->si_generation) | |
3522 | return nfs_ok; | |
6668958f | 3523 | |
0836f587 | 3524 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3525 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3526 | return nfserr_bad_stateid; |
3527 | /* | |
81b82965 BF |
3528 | * However, we could see a stateid from the past, even from a |
3529 | * non-buggy client. For example, if the client sends a lock | |
3530 | * while some IO is outstanding, the lock may bump si_generation | |
3531 | * while the IO is still in flight. The client could avoid that | |
3532 | * situation by waiting for responses on all the IO requests, | |
3533 | * but better performance may result in retrying IO that | |
3534 | * receives an old_stateid error if requests are rarely | |
3535 | * reordered in flight: | |
0836f587 | 3536 | */ |
81b82965 | 3537 | return nfserr_old_stateid; |
0836f587 BF |
3538 | } |
3539 | ||
7df302f7 | 3540 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3541 | { |
97b7e3b6 BF |
3542 | struct nfs4_stid *s; |
3543 | struct nfs4_ol_stateid *ols; | |
3544 | __be32 status; | |
17456804 | 3545 | |
7df302f7 CL |
3546 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3547 | return nfserr_bad_stateid; | |
3548 | /* Client debugging aid. */ | |
3549 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3550 | char addr_str[INET6_ADDRSTRLEN]; | |
3551 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3552 | sizeof(addr_str)); | |
3553 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3554 | "with incorrect client ID\n", addr_str); | |
3555 | return nfserr_bad_stateid; | |
3556 | } | |
38c2f4b1 | 3557 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3558 | if (!s) |
7df302f7 | 3559 | return nfserr_bad_stateid; |
36279ac1 | 3560 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3561 | if (status) |
97b7e3b6 | 3562 | return status; |
23340032 BF |
3563 | switch (s->sc_type) { |
3564 | case NFS4_DELEG_STID: | |
97b7e3b6 | 3565 | return nfs_ok; |
3bd64a5b BF |
3566 | case NFS4_REVOKED_DELEG_STID: |
3567 | return nfserr_deleg_revoked; | |
23340032 BF |
3568 | case NFS4_OPEN_STID: |
3569 | case NFS4_LOCK_STID: | |
3570 | ols = openlockstateid(s); | |
3571 | if (ols->st_stateowner->so_is_open_owner | |
3572 | && !(openowner(ols->st_stateowner)->oo_flags | |
3573 | & NFS4_OO_CONFIRMED)) | |
3574 | return nfserr_bad_stateid; | |
97b7e3b6 | 3575 | return nfs_ok; |
23340032 BF |
3576 | default: |
3577 | printk("unknown stateid type %x\n", s->sc_type); | |
3578 | case NFS4_CLOSED_STID: | |
97b7e3b6 | 3579 | return nfserr_bad_stateid; |
23340032 | 3580 | } |
17456804 BS |
3581 | } |
3582 | ||
3320fef1 SK |
3583 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
3584 | struct nfs4_stid **s, bool sessions, | |
3585 | struct nfsd_net *nn) | |
38c2f4b1 BF |
3586 | { |
3587 | struct nfs4_client *cl; | |
0eb6f20a | 3588 | __be32 status; |
38c2f4b1 BF |
3589 | |
3590 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3591 | return nfserr_bad_stateid; | |
0eb6f20a BF |
3592 | status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, |
3593 | nn, &cl); | |
3594 | if (status == nfserr_stale_clientid) | |
38c2f4b1 | 3595 | return nfserr_stale_stateid; |
0eb6f20a BF |
3596 | if (status) |
3597 | return status; | |
38c2f4b1 BF |
3598 | *s = find_stateid_by_type(cl, stateid, typemask); |
3599 | if (!*s) | |
3600 | return nfserr_bad_stateid; | |
3601 | return nfs_ok; | |
38c2f4b1 BF |
3602 | } |
3603 | ||
1da177e4 LT |
3604 | /* |
3605 | * Checks for stateid operations | |
3606 | */ | |
b37ad28b | 3607 | __be32 |
5ccb0066 | 3608 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3609 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3610 | { |
69064a27 | 3611 | struct nfs4_stid *s; |
dcef0413 | 3612 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3613 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3614 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3615 | struct inode *ino = current_fh->fh_dentry->d_inode; |
3320fef1 | 3616 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b37ad28b | 3617 | __be32 status; |
1da177e4 | 3618 | |
1da177e4 LT |
3619 | if (filpp) |
3620 | *filpp = NULL; | |
3621 | ||
5ccb0066 | 3622 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3623 | return nfserr_grace; |
3624 | ||
3625 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3626 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3627 | |
3320fef1 SK |
3628 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
3629 | &s, cstate->minorversion, nn); | |
38c2f4b1 BF |
3630 | if (status) |
3631 | return status; | |
69064a27 BF |
3632 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3633 | if (status) | |
3634 | goto out; | |
f7a4d872 BF |
3635 | switch (s->sc_type) { |
3636 | case NFS4_DELEG_STID: | |
69064a27 | 3637 | dp = delegstateid(s); |
dc9bf700 BF |
3638 | status = nfs4_check_delegmode(dp, flags); |
3639 | if (status) | |
3640 | goto out; | |
43b0178e | 3641 | if (filpp) { |
acfdf5c3 | 3642 | *filpp = dp->dl_file->fi_deleg_file; |
063b0fb9 BF |
3643 | if (!*filpp) { |
3644 | WARN_ON_ONCE(1); | |
3645 | status = nfserr_serverfault; | |
3646 | goto out; | |
3647 | } | |
43b0178e | 3648 | } |
f7a4d872 BF |
3649 | break; |
3650 | case NFS4_OPEN_STID: | |
3651 | case NFS4_LOCK_STID: | |
69064a27 | 3652 | stp = openlockstateid(s); |
f7a4d872 BF |
3653 | status = nfs4_check_fh(current_fh, stp); |
3654 | if (status) | |
1da177e4 | 3655 | goto out; |
fe0750e5 | 3656 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3657 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3658 | goto out; |
a4455be0 BF |
3659 | status = nfs4_check_openmode(stp, flags); |
3660 | if (status) | |
1da177e4 | 3661 | goto out; |
f9d7562f BF |
3662 | if (filpp) { |
3663 | if (flags & RD_STATE) | |
3664 | *filpp = find_readable_file(stp->st_file); | |
3665 | else | |
3666 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3667 | } |
f7a4d872 BF |
3668 | break; |
3669 | default: | |
3670 | return nfserr_bad_stateid; | |
1da177e4 LT |
3671 | } |
3672 | status = nfs_ok; | |
3673 | out: | |
3674 | return status; | |
3675 | } | |
3676 | ||
e1ca12df | 3677 | static __be32 |
dcef0413 | 3678 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3679 | { |
fe0750e5 | 3680 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3681 | return nfserr_locks_held; |
3682 | release_lock_stateid(stp); | |
3683 | return nfs_ok; | |
3684 | } | |
3685 | ||
17456804 BS |
3686 | /* |
3687 | * Test if the stateid is valid | |
3688 | */ | |
3689 | __be32 | |
3690 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3691 | struct nfsd4_test_stateid *test_stateid) | |
3692 | { | |
03cfb420 BS |
3693 | struct nfsd4_test_stateid_id *stateid; |
3694 | struct nfs4_client *cl = cstate->session->se_client; | |
3695 | ||
3696 | nfs4_lock_state(); | |
3697 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3698 | stateid->ts_id_status = |
3699 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3700 | nfs4_unlock_state(); |
3701 | ||
17456804 BS |
3702 | return nfs_ok; |
3703 | } | |
3704 | ||
e1ca12df BS |
3705 | __be32 |
3706 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3707 | struct nfsd4_free_stateid *free_stateid) | |
3708 | { | |
3709 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3710 | struct nfs4_stid *s; |
3bd64a5b | 3711 | struct nfs4_delegation *dp; |
38c2f4b1 | 3712 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3713 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3714 | |
3715 | nfs4_lock_state(); | |
38c2f4b1 | 3716 | s = find_stateid(cl, stateid); |
2da1cec7 | 3717 | if (!s) |
81b82965 | 3718 | goto out; |
2da1cec7 BF |
3719 | switch (s->sc_type) { |
3720 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3721 | ret = nfserr_locks_held; |
3722 | goto out; | |
2da1cec7 BF |
3723 | case NFS4_OPEN_STID: |
3724 | case NFS4_LOCK_STID: | |
3725 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3726 | if (ret) | |
3727 | goto out; | |
3728 | if (s->sc_type == NFS4_LOCK_STID) | |
3729 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3730 | else | |
3731 | ret = nfserr_locks_held; | |
f7a4d872 | 3732 | break; |
3bd64a5b BF |
3733 | case NFS4_REVOKED_DELEG_STID: |
3734 | dp = delegstateid(s); | |
3735 | destroy_revoked_delegation(dp); | |
3736 | ret = nfs_ok; | |
3737 | break; | |
f7a4d872 BF |
3738 | default: |
3739 | ret = nfserr_bad_stateid; | |
e1ca12df | 3740 | } |
e1ca12df BS |
3741 | out: |
3742 | nfs4_unlock_state(); | |
3743 | return ret; | |
3744 | } | |
3745 | ||
4c4cd222 N |
3746 | static inline int |
3747 | setlkflg (int type) | |
3748 | { | |
3749 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3750 | RD_STATE : WR_STATE; | |
3751 | } | |
1da177e4 | 3752 | |
dcef0413 | 3753 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3754 | { |
3755 | struct svc_fh *current_fh = &cstate->current_fh; | |
3756 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3757 | __be32 status; | |
3758 | ||
c0a5d93e BF |
3759 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3760 | if (status) | |
3761 | return status; | |
3bd64a5b BF |
3762 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
3763 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
f7a4d872 BF |
3764 | /* |
3765 | * "Closed" stateid's exist *only* to return | |
3bd64a5b BF |
3766 | * nfserr_replay_me from the previous step, and |
3767 | * revoked delegations are kept only for free_stateid. | |
f7a4d872 BF |
3768 | */ |
3769 | return nfserr_bad_stateid; | |
3770 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3771 | if (status) | |
3772 | return status; | |
3773 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3774 | } |
3775 | ||
1da177e4 LT |
3776 | /* |
3777 | * Checks for sequence id mutating operations. | |
3778 | */ | |
b37ad28b | 3779 | static __be32 |
dd453dfd | 3780 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3781 | stateid_t *stateid, char typemask, |
3320fef1 SK |
3782 | struct nfs4_ol_stateid **stpp, |
3783 | struct nfsd_net *nn) | |
1da177e4 | 3784 | { |
0836f587 | 3785 | __be32 status; |
38c2f4b1 | 3786 | struct nfs4_stid *s; |
1da177e4 | 3787 | |
8c10cbdb BH |
3788 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3789 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3790 | |
1da177e4 | 3791 | *stpp = NULL; |
3320fef1 SK |
3792 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
3793 | cstate->minorversion, nn); | |
c0a5d93e BF |
3794 | if (status) |
3795 | return status; | |
38c2f4b1 | 3796 | *stpp = openlockstateid(s); |
3d74e6a5 BF |
3797 | if (!nfsd4_has_session(cstate)) |
3798 | cstate->replay_owner = (*stpp)->st_stateowner; | |
1da177e4 | 3799 | |
c0a5d93e BF |
3800 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3801 | } | |
39325bd0 | 3802 | |
3320fef1 SK |
3803 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3804 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
3805 | { |
3806 | __be32 status; | |
3807 | struct nfs4_openowner *oo; | |
1da177e4 | 3808 | |
c0a5d93e | 3809 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
3320fef1 | 3810 | NFS4_OPEN_STID, stpp, nn); |
7a8711c9 BF |
3811 | if (status) |
3812 | return status; | |
c0a5d93e | 3813 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3814 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3815 | return nfserr_bad_stateid; |
3a4f98bb | 3816 | return nfs_ok; |
1da177e4 LT |
3817 | } |
3818 | ||
b37ad28b | 3819 | __be32 |
ca364317 | 3820 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3821 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3822 | { |
b37ad28b | 3823 | __be32 status; |
fe0750e5 | 3824 | struct nfs4_openowner *oo; |
dcef0413 | 3825 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3826 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3827 | |
3828 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3829 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3830 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3831 | |
ca364317 | 3832 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3833 | if (status) |
3834 | return status; | |
1da177e4 LT |
3835 | |
3836 | nfs4_lock_state(); | |
3837 | ||
9072d5c6 | 3838 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3839 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 3840 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 3841 | if (status) |
68b66e82 | 3842 | goto out; |
fe0750e5 | 3843 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3844 | status = nfserr_bad_stateid; |
dad1c067 | 3845 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3846 | goto out; |
dad1c067 | 3847 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3848 | update_stateid(&stp->st_stid.sc_stateid); |
3849 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3850 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3851 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3852 | |
2a4317c5 | 3853 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3854 | status = nfs_ok; |
1da177e4 | 3855 | out: |
9411b1d4 | 3856 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3857 | if (!cstate->replay_owner) |
3858 | nfs4_unlock_state(); | |
1da177e4 LT |
3859 | return status; |
3860 | } | |
3861 | ||
6409a5a6 | 3862 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3863 | { |
82c5ff1b | 3864 | if (!test_access(access, stp)) |
6409a5a6 BF |
3865 | return; |
3866 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3867 | clear_access(access, stp); |
6409a5a6 | 3868 | } |
f197c271 | 3869 | |
6409a5a6 BF |
3870 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3871 | { | |
3872 | switch (to_access) { | |
3873 | case NFS4_SHARE_ACCESS_READ: | |
3874 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3875 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3876 | break; | |
3877 | case NFS4_SHARE_ACCESS_WRITE: | |
3878 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3879 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3880 | break; | |
3881 | case NFS4_SHARE_ACCESS_BOTH: | |
3882 | break; | |
3883 | default: | |
063b0fb9 | 3884 | WARN_ON_ONCE(1); |
1da177e4 LT |
3885 | } |
3886 | } | |
3887 | ||
3888 | static void | |
ce0fc43c | 3889 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3890 | { |
3891 | int i; | |
3892 | for (i = 0; i < 4; i++) { | |
3893 | if ((i & deny) != i) | |
ce0fc43c | 3894 | clear_deny(i, stp); |
1da177e4 LT |
3895 | } |
3896 | } | |
3897 | ||
b37ad28b | 3898 | __be32 |
ca364317 BF |
3899 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3900 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3901 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3902 | { |
b37ad28b | 3903 | __be32 status; |
dcef0413 | 3904 | struct nfs4_ol_stateid *stp; |
3320fef1 | 3905 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3906 | |
3907 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3908 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3909 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3910 | |
c30e92df | 3911 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3912 | if (od->od_deleg_want) |
3913 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3914 | od->od_deleg_want); | |
1da177e4 LT |
3915 | |
3916 | nfs4_lock_state(); | |
c0a5d93e | 3917 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 3918 | &od->od_stateid, &stp, nn); |
9072d5c6 | 3919 | if (status) |
1da177e4 | 3920 | goto out; |
1da177e4 | 3921 | status = nfserr_inval; |
82c5ff1b JL |
3922 | if (!test_access(od->od_share_access, stp)) { |
3923 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3924 | stp->st_access_bmap, od->od_share_access); |
3925 | goto out; | |
3926 | } | |
ce0fc43c | 3927 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3928 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3929 | stp->st_deny_bmap, od->od_share_deny); | |
3930 | goto out; | |
3931 | } | |
6409a5a6 | 3932 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3933 | |
ce0fc43c | 3934 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3935 | |
dcef0413 BF |
3936 | update_stateid(&stp->st_stid.sc_stateid); |
3937 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3938 | status = nfs_ok; |
3939 | out: | |
9411b1d4 | 3940 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
3941 | if (!cstate->replay_owner) |
3942 | nfs4_unlock_state(); | |
1da177e4 LT |
3943 | return status; |
3944 | } | |
3945 | ||
f7a4d872 BF |
3946 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
3947 | { | |
3948 | unhash_open_stateid(s); | |
3949 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3950 | } |
3951 | ||
1da177e4 LT |
3952 | /* |
3953 | * nfs4_unlock_state() called after encode | |
3954 | */ | |
b37ad28b | 3955 | __be32 |
ca364317 | 3956 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3957 | struct nfsd4_close *close) |
1da177e4 | 3958 | { |
b37ad28b | 3959 | __be32 status; |
fe0750e5 | 3960 | struct nfs4_openowner *oo; |
dcef0413 | 3961 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
3962 | struct net *net = SVC_NET(rqstp); |
3963 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
3964 | |
3965 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3966 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3967 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3968 | |
3969 | nfs4_lock_state(); | |
f7a4d872 BF |
3970 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3971 | &close->cl_stateid, | |
3972 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 3973 | &stp, nn); |
9411b1d4 | 3974 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 3975 | if (status) |
1da177e4 | 3976 | goto out; |
fe0750e5 | 3977 | oo = openowner(stp->st_stateowner); |
dcef0413 BF |
3978 | update_stateid(&stp->st_stid.sc_stateid); |
3979 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3980 | |
f7a4d872 | 3981 | nfsd4_close_open_stateid(stp); |
9411b1d4 BF |
3982 | |
3983 | if (cstate->minorversion) { | |
3984 | unhash_stid(&stp->st_stid); | |
3985 | free_generic_stateid(stp); | |
3986 | } else | |
3987 | oo->oo_last_closed_stid = stp; | |
04ef5954 | 3988 | |
74dbafaf | 3989 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3d74e6a5 | 3990 | if (cstate->minorversion) |
74dbafaf | 3991 | release_openowner(oo); |
3d74e6a5 | 3992 | else { |
74dbafaf BF |
3993 | /* |
3994 | * In the 4.0 case we need to keep the owners around a | |
3995 | * little while to handle CLOSE replay. | |
3996 | */ | |
53584f66 | 3997 | move_to_close_lru(oo, SVC_NET(rqstp)); |
74dbafaf BF |
3998 | } |
3999 | } | |
1da177e4 | 4000 | out: |
5ec094c1 BF |
4001 | if (!cstate->replay_owner) |
4002 | nfs4_unlock_state(); | |
1da177e4 LT |
4003 | return status; |
4004 | } | |
4005 | ||
b37ad28b | 4006 | __be32 |
ca364317 BF |
4007 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4008 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 4009 | { |
203a8c8e BF |
4010 | struct nfs4_delegation *dp; |
4011 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 4012 | struct nfs4_stid *s; |
b37ad28b | 4013 | __be32 status; |
3320fef1 | 4014 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4015 | |
ca364317 | 4016 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 4017 | return status; |
1da177e4 LT |
4018 | |
4019 | nfs4_lock_state(); | |
3320fef1 SK |
4020 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
4021 | cstate->minorversion, nn); | |
38c2f4b1 | 4022 | if (status) |
203a8c8e | 4023 | goto out; |
38c2f4b1 | 4024 | dp = delegstateid(s); |
d5477a8d | 4025 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
4026 | if (status) |
4027 | goto out; | |
203a8c8e | 4028 | |
3bd64a5b | 4029 | destroy_delegation(dp); |
1da177e4 | 4030 | out: |
203a8c8e BF |
4031 | nfs4_unlock_state(); |
4032 | ||
1da177e4 LT |
4033 | return status; |
4034 | } | |
4035 | ||
4036 | ||
1da177e4 | 4037 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 4038 | |
009673b4 | 4039 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
1da177e4 | 4040 | |
87df4de8 BH |
4041 | static inline u64 |
4042 | end_offset(u64 start, u64 len) | |
4043 | { | |
4044 | u64 end; | |
4045 | ||
4046 | end = start + len; | |
4047 | return end >= start ? end: NFS4_MAX_UINT64; | |
4048 | } | |
4049 | ||
4050 | /* last octet in a range */ | |
4051 | static inline u64 | |
4052 | last_byte_offset(u64 start, u64 len) | |
4053 | { | |
4054 | u64 end; | |
4055 | ||
063b0fb9 | 4056 | WARN_ON_ONCE(!len); |
87df4de8 BH |
4057 | end = start + len; |
4058 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
4059 | } | |
4060 | ||
009673b4 | 4061 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
4062 | { |
4063 | return (file_hashval(inode) + cl_id | |
4064 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 4065 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
4066 | } |
4067 | ||
1da177e4 LT |
4068 | /* |
4069 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
4070 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
4071 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
4072 | * locking, this prevents us from being completely protocol-compliant. The | |
4073 | * real solution to this problem is to start using unsigned file offsets in | |
4074 | * the VFS, but this is a very deep change! | |
4075 | */ | |
4076 | static inline void | |
4077 | nfs4_transform_lock_offset(struct file_lock *lock) | |
4078 | { | |
4079 | if (lock->fl_start < 0) | |
4080 | lock->fl_start = OFFSET_MAX; | |
4081 | if (lock->fl_end < 0) | |
4082 | lock->fl_end = OFFSET_MAX; | |
4083 | } | |
4084 | ||
d5b9026a N |
4085 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
4086 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 4087 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 4088 | }; |
1da177e4 LT |
4089 | |
4090 | static inline void | |
4091 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
4092 | { | |
fe0750e5 | 4093 | struct nfs4_lockowner *lo; |
1da177e4 | 4094 | |
d5b9026a | 4095 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
4096 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
4097 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
4098 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
4099 | if (!deny->ld_owner.data) |
4100 | /* We just don't care that much */ | |
4101 | goto nevermind; | |
fe0750e5 BF |
4102 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
4103 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 4104 | } else { |
7c13f344 BF |
4105 | nevermind: |
4106 | deny->ld_owner.len = 0; | |
4107 | deny->ld_owner.data = NULL; | |
d5b9026a N |
4108 | deny->ld_clientid.cl_boot = 0; |
4109 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
4110 | } |
4111 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
4112 | deny->ld_length = NFS4_MAX_UINT64; |
4113 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
4114 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
4115 | deny->ld_type = NFS4_READ_LT; | |
4116 | if (fl->fl_type != F_RDLCK) | |
4117 | deny->ld_type = NFS4_WRITE_LT; | |
4118 | } | |
4119 | ||
b93d87c1 BF |
4120 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
4121 | { | |
4122 | struct nfs4_ol_stateid *lst; | |
4123 | ||
4124 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
4125 | return false; | |
4126 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4127 | struct nfs4_ol_stateid, st_perstateowner); | |
4128 | return lst->st_file->fi_inode == inode; | |
4129 | } | |
4130 | ||
fe0750e5 BF |
4131 | static struct nfs4_lockowner * |
4132 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
20e9e2bc | 4133 | struct xdr_netobj *owner, struct nfsd_net *nn) |
1da177e4 | 4134 | { |
009673b4 | 4135 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 4136 | struct nfs4_lockowner *lo; |
1da177e4 | 4137 | |
20e9e2bc | 4138 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
4139 | if (same_lockowner_ino(lo, inode, clid, owner)) |
4140 | return lo; | |
1da177e4 LT |
4141 | } |
4142 | return NULL; | |
4143 | } | |
4144 | ||
dcef0413 | 4145 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 4146 | { |
009673b4 BF |
4147 | struct inode *inode = open_stp->st_file->fi_inode; |
4148 | unsigned int inohash = lockowner_ino_hashval(inode, | |
4149 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
9b531137 | 4150 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
009673b4 | 4151 | |
9b531137 | 4152 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
20e9e2bc | 4153 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 4154 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
4155 | } |
4156 | ||
1da177e4 LT |
4157 | /* |
4158 | * Alloc a lock owner structure. | |
4159 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 4160 | * occurred. |
1da177e4 | 4161 | * |
16bfdaaf | 4162 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4163 | */ |
4164 | ||
fe0750e5 | 4165 | static struct nfs4_lockowner * |
dcef0413 | 4166 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4167 | struct nfs4_lockowner *lo; |
1da177e4 | 4168 | |
fe0750e5 BF |
4169 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4170 | if (!lo) | |
1da177e4 | 4171 | return NULL; |
fe0750e5 BF |
4172 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4173 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4174 | /* It is the openowner seqid that will be incremented in encode in the |
4175 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4176 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4177 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4178 | return lo; | |
1da177e4 LT |
4179 | } |
4180 | ||
dcef0413 BF |
4181 | static struct nfs4_ol_stateid * |
4182 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4183 | { |
dcef0413 | 4184 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4185 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4186 | |
996e0938 | 4187 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4188 | if (stp == NULL) |
6136d2b4 | 4189 | return NULL; |
3abdb607 | 4190 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
8beefa24 | 4191 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4192 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4193 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4194 | get_nfs4_file(fp); |
1da177e4 | 4195 | stp->st_file = fp; |
0997b173 | 4196 | stp->st_access_bmap = 0; |
1da177e4 | 4197 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4198 | stp->st_openstp = open_stp; |
1da177e4 LT |
4199 | return stp; |
4200 | } | |
4201 | ||
fd39ca9a | 4202 | static int |
1da177e4 LT |
4203 | check_lock_length(u64 offset, u64 length) |
4204 | { | |
87df4de8 | 4205 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4206 | LOFF_OVERFLOW(offset, length))); |
4207 | } | |
4208 | ||
dcef0413 | 4209 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4210 | { |
4211 | struct nfs4_file *fp = lock_stp->st_file; | |
4212 | int oflag = nfs4_access_to_omode(access); | |
4213 | ||
82c5ff1b | 4214 | if (test_access(access, lock_stp)) |
0997b173 BF |
4215 | return; |
4216 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4217 | set_access(access, lock_stp); |
0997b173 BF |
4218 | } |
4219 | ||
2355c596 | 4220 | 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 |
4221 | { |
4222 | struct nfs4_file *fi = ost->st_file; | |
4223 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4224 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4225 | struct nfs4_lockowner *lo; | |
4226 | unsigned int strhashval; | |
20e9e2bc | 4227 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
64a284d0 | 4228 | |
20e9e2bc SK |
4229 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
4230 | &lock->v.new.owner, nn); | |
64a284d0 BF |
4231 | if (lo) { |
4232 | if (!cstate->minorversion) | |
4233 | return nfserr_bad_seqid; | |
4234 | /* XXX: a lockowner always has exactly one stateid: */ | |
4235 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4236 | struct nfs4_ol_stateid, st_perstateowner); | |
4237 | return nfs_ok; | |
4238 | } | |
16bfdaaf | 4239 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4240 | &lock->v.new.owner); |
4241 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4242 | if (lo == NULL) | |
4243 | return nfserr_jukebox; | |
4244 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4245 | if (*lst == NULL) { | |
4246 | release_lockowner(lo); | |
4247 | return nfserr_jukebox; | |
4248 | } | |
4249 | *new = true; | |
4250 | return nfs_ok; | |
4251 | } | |
4252 | ||
1da177e4 LT |
4253 | /* |
4254 | * LOCK operation | |
4255 | */ | |
b37ad28b | 4256 | __be32 |
ca364317 | 4257 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4258 | struct nfsd4_lock *lock) |
1da177e4 | 4259 | { |
fe0750e5 BF |
4260 | struct nfs4_openowner *open_sop = NULL; |
4261 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4262 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4263 | struct file *filp = NULL; |
21179d81 JL |
4264 | struct file_lock *file_lock = NULL; |
4265 | struct file_lock *conflock = NULL; | |
b37ad28b | 4266 | __be32 status = 0; |
64a284d0 | 4267 | bool new_state = false; |
b34f27aa | 4268 | int lkflg; |
b8dd7b9a | 4269 | int err; |
3320fef1 SK |
4270 | struct net *net = SVC_NET(rqstp); |
4271 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
4272 | |
4273 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4274 | (long long) lock->lk_offset, | |
4275 | (long long) lock->lk_length); | |
4276 | ||
1da177e4 LT |
4277 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4278 | return nfserr_inval; | |
4279 | ||
ca364317 | 4280 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4281 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4282 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4283 | return status; | |
4284 | } | |
4285 | ||
1da177e4 LT |
4286 | nfs4_lock_state(); |
4287 | ||
4288 | if (lock->lk_is_new) { | |
dcef0413 | 4289 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4290 | |
4291 | if (nfsd4_has_session(cstate)) | |
4292 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4293 | memcpy(&lock->v.new.clientid, | |
4294 | &cstate->session->se_client->cl_clientid, | |
4295 | sizeof(clientid_t)); | |
4296 | ||
1da177e4 | 4297 | status = nfserr_stale_clientid; |
2c142baa | 4298 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4299 | goto out; |
1da177e4 | 4300 | |
1da177e4 | 4301 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4302 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4303 | lock->lk_new_open_seqid, |
4304 | &lock->lk_new_open_stateid, | |
3320fef1 | 4305 | &open_stp, nn); |
37515177 | 4306 | if (status) |
1da177e4 | 4307 | goto out; |
fe0750e5 | 4308 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4309 | status = nfserr_bad_stateid; |
684e5638 | 4310 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4311 | &lock->v.new.clientid)) |
4312 | goto out; | |
64a284d0 BF |
4313 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4314 | &lock_stp, &new_state); | |
e1aaa891 | 4315 | } else |
dd453dfd | 4316 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4317 | lock->lk_old_lock_seqid, |
4318 | &lock->lk_old_lock_stateid, | |
3320fef1 | 4319 | NFS4_LOCK_STID, &lock_stp, nn); |
e1aaa891 BF |
4320 | if (status) |
4321 | goto out; | |
64a284d0 | 4322 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4323 | |
b34f27aa BF |
4324 | lkflg = setlkflg(lock->lk_type); |
4325 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4326 | if (status) | |
4327 | goto out; | |
4328 | ||
0dd395dc | 4329 | status = nfserr_grace; |
3320fef1 | 4330 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
4331 | goto out; |
4332 | status = nfserr_no_grace; | |
3320fef1 | 4333 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
4334 | goto out; |
4335 | ||
21179d81 JL |
4336 | file_lock = locks_alloc_lock(); |
4337 | if (!file_lock) { | |
4338 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4339 | status = nfserr_jukebox; | |
4340 | goto out; | |
4341 | } | |
4342 | ||
4343 | locks_init_lock(file_lock); | |
1da177e4 LT |
4344 | switch (lock->lk_type) { |
4345 | case NFS4_READ_LT: | |
4346 | case NFS4_READW_LT: | |
0997b173 BF |
4347 | filp = find_readable_file(lock_stp->st_file); |
4348 | if (filp) | |
4349 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4350 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4351 | break; |
1da177e4 LT |
4352 | case NFS4_WRITE_LT: |
4353 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4354 | filp = find_writeable_file(lock_stp->st_file); |
4355 | if (filp) | |
4356 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4357 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4358 | break; |
1da177e4 LT |
4359 | default: |
4360 | status = nfserr_inval; | |
4361 | goto out; | |
4362 | } | |
f9d7562f BF |
4363 | if (!filp) { |
4364 | status = nfserr_openmode; | |
4365 | goto out; | |
4366 | } | |
21179d81 JL |
4367 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4368 | file_lock->fl_pid = current->tgid; | |
4369 | file_lock->fl_file = filp; | |
4370 | file_lock->fl_flags = FL_POSIX; | |
4371 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4372 | file_lock->fl_start = lock->lk_offset; | |
4373 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4374 | nfs4_transform_lock_offset(file_lock); | |
4375 | ||
4376 | conflock = locks_alloc_lock(); | |
4377 | if (!conflock) { | |
4378 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4379 | status = nfserr_jukebox; | |
4380 | goto out; | |
4381 | } | |
1da177e4 | 4382 | |
21179d81 | 4383 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4384 | switch (-err) { |
1da177e4 | 4385 | case 0: /* success! */ |
dcef0413 BF |
4386 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4387 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4388 | sizeof(stateid_t)); |
b8dd7b9a | 4389 | status = 0; |
eb76b3fd AA |
4390 | break; |
4391 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4392 | status = nfserr_denied; | |
4393 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4394 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4395 | break; |
1da177e4 LT |
4396 | case (EDEADLK): |
4397 | status = nfserr_deadlock; | |
eb76b3fd | 4398 | break; |
3e772463 | 4399 | default: |
fd85b817 | 4400 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4401 | status = nfserrno(err); |
eb76b3fd | 4402 | break; |
1da177e4 | 4403 | } |
1da177e4 | 4404 | out: |
64a284d0 | 4405 | if (status && new_state) |
f044ff83 | 4406 | release_lockowner(lock_sop); |
9411b1d4 | 4407 | nfsd4_bump_seqid(cstate, status); |
5ec094c1 BF |
4408 | if (!cstate->replay_owner) |
4409 | nfs4_unlock_state(); | |
21179d81 JL |
4410 | if (file_lock) |
4411 | locks_free_lock(file_lock); | |
4412 | if (conflock) | |
4413 | locks_free_lock(conflock); | |
1da177e4 LT |
4414 | return status; |
4415 | } | |
4416 | ||
55ef1274 BF |
4417 | /* |
4418 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4419 | * so we do a temporary open here just to get an open file to pass to | |
4420 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4421 | * inode operation.) | |
4422 | */ | |
04da6e9d | 4423 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4424 | { |
4425 | struct file *file; | |
04da6e9d AV |
4426 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4427 | if (!err) { | |
4428 | err = nfserrno(vfs_test_lock(file, lock)); | |
4429 | nfsd_close(file); | |
4430 | } | |
55ef1274 BF |
4431 | return err; |
4432 | } | |
4433 | ||
1da177e4 LT |
4434 | /* |
4435 | * LOCKT operation | |
4436 | */ | |
b37ad28b | 4437 | __be32 |
ca364317 BF |
4438 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4439 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4440 | { |
4441 | struct inode *inode; | |
21179d81 | 4442 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4443 | struct nfs4_lockowner *lo; |
b37ad28b | 4444 | __be32 status; |
7f2210fa | 4445 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4446 | |
5ccb0066 | 4447 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4448 | return nfserr_grace; |
4449 | ||
4450 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4451 | return nfserr_inval; | |
4452 | ||
1da177e4 LT |
4453 | nfs4_lock_state(); |
4454 | ||
9b2ef62b BF |
4455 | if (!nfsd4_has_session(cstate)) { |
4456 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); | |
4457 | if (status) | |
4458 | goto out; | |
4459 | } | |
1da177e4 | 4460 | |
75c096f7 | 4461 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4462 | goto out; |
1da177e4 | 4463 | |
ca364317 | 4464 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4465 | file_lock = locks_alloc_lock(); |
4466 | if (!file_lock) { | |
4467 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4468 | status = nfserr_jukebox; | |
4469 | goto out; | |
4470 | } | |
4471 | locks_init_lock(file_lock); | |
1da177e4 LT |
4472 | switch (lockt->lt_type) { |
4473 | case NFS4_READ_LT: | |
4474 | case NFS4_READW_LT: | |
21179d81 | 4475 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4476 | break; |
4477 | case NFS4_WRITE_LT: | |
4478 | case NFS4_WRITEW_LT: | |
21179d81 | 4479 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4480 | break; |
4481 | default: | |
2fdada03 | 4482 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4483 | status = nfserr_inval; |
4484 | goto out; | |
4485 | } | |
4486 | ||
20e9e2bc | 4487 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
fe0750e5 | 4488 | if (lo) |
21179d81 JL |
4489 | file_lock->fl_owner = (fl_owner_t)lo; |
4490 | file_lock->fl_pid = current->tgid; | |
4491 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4492 | |
21179d81 JL |
4493 | file_lock->fl_start = lockt->lt_offset; |
4494 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4495 | |
21179d81 | 4496 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4497 | |
21179d81 | 4498 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4499 | if (status) |
fd85b817 | 4500 | goto out; |
04da6e9d | 4501 | |
21179d81 | 4502 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4503 | status = nfserr_denied; |
21179d81 | 4504 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4505 | } |
4506 | out: | |
4507 | nfs4_unlock_state(); | |
21179d81 JL |
4508 | if (file_lock) |
4509 | locks_free_lock(file_lock); | |
1da177e4 LT |
4510 | return status; |
4511 | } | |
4512 | ||
b37ad28b | 4513 | __be32 |
ca364317 | 4514 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4515 | struct nfsd4_locku *locku) |
1da177e4 | 4516 | { |
dcef0413 | 4517 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4518 | struct file *filp = NULL; |
21179d81 | 4519 | struct file_lock *file_lock = NULL; |
b37ad28b | 4520 | __be32 status; |
b8dd7b9a | 4521 | int err; |
3320fef1 SK |
4522 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4523 | ||
1da177e4 LT |
4524 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
4525 | (long long) locku->lu_offset, | |
4526 | (long long) locku->lu_length); | |
4527 | ||
4528 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4529 | return nfserr_inval; | |
4530 | ||
4531 | nfs4_lock_state(); | |
4532 | ||
9072d5c6 | 4533 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
4534 | &locku->lu_stateid, NFS4_LOCK_STID, |
4535 | &stp, nn); | |
9072d5c6 | 4536 | if (status) |
1da177e4 | 4537 | goto out; |
f9d7562f BF |
4538 | filp = find_any_file(stp->st_file); |
4539 | if (!filp) { | |
4540 | status = nfserr_lock_range; | |
4541 | goto out; | |
4542 | } | |
21179d81 JL |
4543 | file_lock = locks_alloc_lock(); |
4544 | if (!file_lock) { | |
4545 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4546 | status = nfserr_jukebox; | |
4547 | goto out; | |
4548 | } | |
4549 | locks_init_lock(file_lock); | |
4550 | file_lock->fl_type = F_UNLCK; | |
0a262ffb | 4551 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
21179d81 JL |
4552 | file_lock->fl_pid = current->tgid; |
4553 | file_lock->fl_file = filp; | |
4554 | file_lock->fl_flags = FL_POSIX; | |
4555 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4556 | file_lock->fl_start = locku->lu_offset; | |
4557 | ||
4558 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4559 | locku->lu_length); | |
4560 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 4561 | |
21179d81 | 4562 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4563 | if (err) { |
fd85b817 | 4564 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4565 | goto out_nfserr; |
4566 | } | |
dcef0413 BF |
4567 | update_stateid(&stp->st_stid.sc_stateid); |
4568 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4569 | |
4570 | out: | |
9411b1d4 | 4571 | nfsd4_bump_seqid(cstate, status); |
71c3bcd7 BF |
4572 | if (!cstate->replay_owner) |
4573 | nfs4_unlock_state(); | |
21179d81 JL |
4574 | if (file_lock) |
4575 | locks_free_lock(file_lock); | |
1da177e4 LT |
4576 | return status; |
4577 | ||
4578 | out_nfserr: | |
b8dd7b9a | 4579 | status = nfserrno(err); |
1da177e4 LT |
4580 | goto out; |
4581 | } | |
4582 | ||
4583 | /* | |
4584 | * returns | |
4585 | * 1: locks held by lockowner | |
4586 | * 0: no locks held by lockowner | |
4587 | */ | |
4588 | static int | |
fe0750e5 | 4589 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4590 | { |
4591 | struct file_lock **flpp; | |
f9d7562f | 4592 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4593 | int status = 0; |
4594 | ||
b89f4321 | 4595 | lock_flocks(); |
1da177e4 | 4596 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4597 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4598 | status = 1; |
4599 | goto out; | |
796dadfd | 4600 | } |
1da177e4 LT |
4601 | } |
4602 | out: | |
b89f4321 | 4603 | unlock_flocks(); |
1da177e4 LT |
4604 | return status; |
4605 | } | |
4606 | ||
b37ad28b | 4607 | __be32 |
b591480b BF |
4608 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4609 | struct nfsd4_compound_state *cstate, | |
4610 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4611 | { |
4612 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4613 | struct nfs4_stateowner *sop; |
fe0750e5 | 4614 | struct nfs4_lockowner *lo; |
dcef0413 | 4615 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4616 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4617 | struct list_head matches; |
16bfdaaf | 4618 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4619 | __be32 status; |
7f2210fa | 4620 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4621 | |
4622 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4623 | clid->cl_boot, clid->cl_id); | |
4624 | ||
1da177e4 LT |
4625 | nfs4_lock_state(); |
4626 | ||
9b2ef62b BF |
4627 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
4628 | if (status) | |
4629 | goto out; | |
4630 | ||
3e9e3dbe | 4631 | status = nfserr_locks_held; |
3e9e3dbe | 4632 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4633 | |
9b531137 | 4634 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
16bfdaaf BF |
4635 | if (sop->so_is_open_owner) |
4636 | continue; | |
06f1f864 BF |
4637 | if (!same_owner_str(sop, owner, clid)) |
4638 | continue; | |
4639 | list_for_each_entry(stp, &sop->so_stateids, | |
4640 | st_perstateowner) { | |
4641 | lo = lockowner(sop); | |
4642 | if (check_for_locks(stp->st_file, lo)) | |
4643 | goto out; | |
4644 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4645 | } |
3e9e3dbe N |
4646 | } |
4647 | /* Clients probably won't expect us to return with some (but not all) | |
4648 | * of the lockowner state released; so don't release any until all | |
4649 | * have been checked. */ | |
4650 | status = nfs_ok; | |
0fa822e4 | 4651 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4652 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4653 | lo_list); | |
0fa822e4 N |
4654 | /* unhash_stateowner deletes so_perclient only |
4655 | * for openowners. */ | |
fe0750e5 BF |
4656 | list_del(&lo->lo_list); |
4657 | release_lockowner(lo); | |
1da177e4 LT |
4658 | } |
4659 | out: | |
4660 | nfs4_unlock_state(); | |
4661 | return status; | |
4662 | } | |
4663 | ||
4664 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4665 | alloc_reclaim(void) |
1da177e4 | 4666 | { |
a55370a3 | 4667 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4668 | } |
4669 | ||
0ce0c2b5 | 4670 | bool |
52e19c09 | 4671 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
c7b9a459 | 4672 | { |
0ce0c2b5 | 4673 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4674 | |
52e19c09 | 4675 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 4676 | return (crp && crp->cr_clp); |
c7b9a459 N |
4677 | } |
4678 | ||
1da177e4 LT |
4679 | /* |
4680 | * failure => all reset bets are off, nfserr_no_grace... | |
4681 | */ | |
772a9bbb | 4682 | struct nfs4_client_reclaim * |
52e19c09 | 4683 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
1da177e4 LT |
4684 | { |
4685 | unsigned int strhashval; | |
772a9bbb | 4686 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4687 | |
a55370a3 N |
4688 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4689 | crp = alloc_reclaim(); | |
772a9bbb JL |
4690 | if (crp) { |
4691 | strhashval = clientstr_hashval(name); | |
4692 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 4693 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
772a9bbb | 4694 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
0ce0c2b5 | 4695 | crp->cr_clp = NULL; |
52e19c09 | 4696 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
4697 | } |
4698 | return crp; | |
1da177e4 LT |
4699 | } |
4700 | ||
ce30e539 | 4701 | void |
52e19c09 | 4702 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
4703 | { |
4704 | list_del(&crp->cr_strhash); | |
4705 | kfree(crp); | |
52e19c09 | 4706 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
4707 | } |
4708 | ||
2a4317c5 | 4709 | void |
52e19c09 | 4710 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
4711 | { |
4712 | struct nfs4_client_reclaim *crp = NULL; | |
4713 | int i; | |
4714 | ||
1da177e4 | 4715 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
4716 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
4717 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 4718 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 4719 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
4720 | } |
4721 | } | |
063b0fb9 | 4722 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
4723 | } |
4724 | ||
4725 | /* | |
4726 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4727 | struct nfs4_client_reclaim * |
52e19c09 | 4728 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
1da177e4 LT |
4729 | { |
4730 | unsigned int strhashval; | |
1da177e4 LT |
4731 | struct nfs4_client_reclaim *crp = NULL; |
4732 | ||
278c931c | 4733 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4734 | |
278c931c | 4735 | strhashval = clientstr_hashval(recdir); |
52e19c09 | 4736 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4737 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4738 | return crp; |
4739 | } | |
4740 | } | |
4741 | return NULL; | |
4742 | } | |
4743 | ||
4744 | /* | |
4745 | * Called from OPEN. Look for clientid in reclaim list. | |
4746 | */ | |
b37ad28b | 4747 | __be32 |
3320fef1 | 4748 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 4749 | { |
a52d726b JL |
4750 | struct nfs4_client *clp; |
4751 | ||
4752 | /* find clientid in conf_id_hashtbl */ | |
8daae4dc | 4753 | clp = find_confirmed_client(clid, sessions, nn); |
a52d726b JL |
4754 | if (clp == NULL) |
4755 | return nfserr_reclaim_bad; | |
4756 | ||
4757 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4758 | } |
4759 | ||
65178db4 BS |
4760 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4761 | ||
44e34da6 BS |
4762 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
4763 | { | |
221a6876 BF |
4764 | if (mark_client_expired(clp)) |
4765 | return 0; | |
44e34da6 BS |
4766 | expire_client(clp); |
4767 | return 1; | |
4768 | } | |
4769 | ||
184c1847 BS |
4770 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
4771 | { | |
4772 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4773 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4774 | printk(KERN_INFO "NFS Client: %s\n", buf); |
4775 | return 1; | |
4776 | } | |
4777 | ||
4778 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, | |
4779 | const char *type) | |
4780 | { | |
4781 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 4782 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
4783 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
4784 | } | |
4785 | ||
fc29171f BS |
4786 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
4787 | { | |
4788 | struct nfs4_openowner *oop; | |
4789 | struct nfs4_lockowner *lop, *lo_next; | |
4790 | struct nfs4_ol_stateid *stp, *st_next; | |
4791 | u64 count = 0; | |
4792 | ||
4793 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { | |
4794 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { | |
4795 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { | |
4796 | if (func) | |
4797 | func(lop); | |
4798 | if (++count == max) | |
4799 | return count; | |
4800 | } | |
4801 | } | |
4802 | } | |
4803 | ||
4804 | return count; | |
4805 | } | |
4806 | ||
4807 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) | |
4808 | { | |
4809 | return nfsd_foreach_client_lock(clp, max, release_lockowner); | |
4810 | } | |
4811 | ||
184c1847 BS |
4812 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
4813 | { | |
4814 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); | |
4815 | nfsd_print_count(clp, count, "locked files"); | |
4816 | return count; | |
4817 | } | |
4818 | ||
4dbdbda8 BS |
4819 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
4820 | { | |
4821 | struct nfs4_openowner *oop, *next; | |
4822 | u64 count = 0; | |
4823 | ||
4824 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { | |
4825 | if (func) | |
4826 | func(oop); | |
4827 | if (++count == max) | |
4828 | break; | |
4829 | } | |
4830 | ||
4831 | return count; | |
4832 | } | |
4833 | ||
4834 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) | |
4835 | { | |
4836 | return nfsd_foreach_client_open(clp, max, release_openowner); | |
4837 | } | |
4838 | ||
184c1847 BS |
4839 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
4840 | { | |
4841 | u64 count = nfsd_foreach_client_open(clp, max, NULL); | |
4842 | nfsd_print_count(clp, count, "open files"); | |
4843 | return count; | |
4844 | } | |
4845 | ||
269de30f BS |
4846 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
4847 | struct list_head *victims) | |
4848 | { | |
4849 | struct nfs4_delegation *dp, *next; | |
4850 | u64 count = 0; | |
4851 | ||
4852 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { | |
4853 | if (victims) | |
4854 | list_move(&dp->dl_recall_lru, victims); | |
4855 | if (++count == max) | |
4856 | break; | |
4857 | } | |
4858 | return count; | |
4859 | } | |
4860 | ||
4861 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) | |
4862 | { | |
4863 | struct nfs4_delegation *dp, *next; | |
4864 | LIST_HEAD(victims); | |
4865 | u64 count; | |
4866 | ||
4867 | spin_lock(&recall_lock); | |
4868 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4869 | spin_unlock(&recall_lock); | |
4870 | ||
4871 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
3bd64a5b | 4872 | revoke_delegation(dp); |
269de30f BS |
4873 | |
4874 | return count; | |
4875 | } | |
4876 | ||
4877 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) | |
4878 | { | |
4879 | struct nfs4_delegation *dp, *next; | |
4880 | LIST_HEAD(victims); | |
4881 | u64 count; | |
4882 | ||
4883 | spin_lock(&recall_lock); | |
4884 | count = nfsd_find_all_delegations(clp, max, &victims); | |
4885 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) | |
4886 | nfsd_break_one_deleg(dp); | |
4887 | spin_unlock(&recall_lock); | |
4888 | ||
4889 | return count; | |
4890 | } | |
4891 | ||
184c1847 BS |
4892 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
4893 | { | |
4894 | u64 count = 0; | |
4895 | ||
4896 | spin_lock(&recall_lock); | |
4897 | count = nfsd_find_all_delegations(clp, max, NULL); | |
4898 | spin_unlock(&recall_lock); | |
4899 | ||
4900 | nfsd_print_count(clp, count, "delegations"); | |
4901 | return count; | |
4902 | } | |
4903 | ||
44e34da6 | 4904 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
65178db4 BS |
4905 | { |
4906 | struct nfs4_client *clp, *next; | |
44e34da6 | 4907 | u64 count = 0; |
3320fef1 | 4908 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
65178db4 | 4909 | |
44e34da6 BS |
4910 | if (!nfsd_netns_ready(nn)) |
4911 | return 0; | |
4912 | ||
5ed58bb2 | 4913 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
44e34da6 BS |
4914 | count += func(clp, max - count); |
4915 | if ((max != 0) && (count >= max)) | |
65178db4 BS |
4916 | break; |
4917 | } | |
65178db4 | 4918 | |
44e34da6 BS |
4919 | return count; |
4920 | } | |
4921 | ||
6c1e82a4 BS |
4922 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
4923 | { | |
4924 | struct nfs4_client *clp; | |
4925 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); | |
4926 | ||
4927 | if (!nfsd_netns_ready(nn)) | |
4928 | return NULL; | |
4929 | ||
4930 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
4931 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
4932 | return clp; | |
4933 | } | |
4934 | return NULL; | |
4935 | } | |
4936 | ||
65178db4 BS |
4937 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
4938 | ||
ac4d8ff2 | 4939 | /* initialization to perform at module load time: */ |
1da177e4 | 4940 | |
72083396 | 4941 | void |
ac4d8ff2 | 4942 | nfs4_state_init(void) |
1da177e4 | 4943 | { |
ac4d8ff2 N |
4944 | } |
4945 | ||
c2f1a551 MS |
4946 | /* |
4947 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4948 | * client may quite reasonably hang on to a delegation as long as it has | |
4949 | * the inode cached. This becomes an obvious problem the first time a | |
4950 | * client's inode cache approaches the size of the server's total memory. | |
4951 | * | |
4952 | * For now we avoid this problem by imposing a hard limit on the number | |
4953 | * of delegations, which varies according to the server's memory size. | |
4954 | */ | |
4955 | static void | |
4956 | set_max_delegations(void) | |
4957 | { | |
4958 | /* | |
4959 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4960 | * estimates suggest that in the worst case (where every delegation | |
4961 | * is for a different inode), a delegation could take about 1.5K, | |
4962 | * giving a worst case usage of about 6% of memory. | |
4963 | */ | |
4964 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4965 | } | |
4966 | ||
d85ed443 | 4967 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
4968 | { |
4969 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4970 | int i; | |
4971 | ||
4972 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * | |
4973 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4974 | if (!nn->conf_id_hashtbl) | |
382a62e7 | 4975 | goto err; |
0a7ec377 SK |
4976 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
4977 | CLIENT_HASH_SIZE, GFP_KERNEL); | |
4978 | if (!nn->unconf_id_hashtbl) | |
4979 | goto err_unconf_id; | |
9b531137 SK |
4980 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
4981 | OWNER_HASH_SIZE, GFP_KERNEL); | |
4982 | if (!nn->ownerstr_hashtbl) | |
4983 | goto err_ownerstr; | |
20e9e2bc SK |
4984 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
4985 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); | |
4986 | if (!nn->lockowner_ino_hashtbl) | |
4987 | goto err_lockowner_ino; | |
1872de0e SK |
4988 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
4989 | SESSION_HASH_SIZE, GFP_KERNEL); | |
4990 | if (!nn->sessionid_hashtbl) | |
4991 | goto err_sessionid; | |
8daae4dc | 4992 | |
382a62e7 | 4993 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 4994 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 4995 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 4996 | } |
9b531137 SK |
4997 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
4998 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); | |
20e9e2bc SK |
4999 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
5000 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); | |
1872de0e SK |
5001 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
5002 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 5003 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 5004 | nn->unconf_name_tree = RB_ROOT; |
5ed58bb2 | 5005 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 5006 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 5007 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 5008 | spin_lock_init(&nn->client_lock); |
8daae4dc | 5009 | |
09121281 | 5010 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 5011 | get_net(net); |
09121281 | 5012 | |
8daae4dc | 5013 | return 0; |
382a62e7 | 5014 | |
1872de0e SK |
5015 | err_sessionid: |
5016 | kfree(nn->lockowner_ino_hashtbl); | |
20e9e2bc SK |
5017 | err_lockowner_ino: |
5018 | kfree(nn->ownerstr_hashtbl); | |
9b531137 SK |
5019 | err_ownerstr: |
5020 | kfree(nn->unconf_id_hashtbl); | |
0a7ec377 SK |
5021 | err_unconf_id: |
5022 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
5023 | err: |
5024 | return -ENOMEM; | |
8daae4dc SK |
5025 | } |
5026 | ||
5027 | static void | |
4dce0ac9 | 5028 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
5029 | { |
5030 | int i; | |
5031 | struct nfs4_client *clp = NULL; | |
5032 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
a99454aa | 5033 | struct rb_node *node, *tmp; |
8daae4dc SK |
5034 | |
5035 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
5036 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
5037 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
5038 | destroy_client(clp); | |
5039 | } | |
5040 | } | |
a99454aa SK |
5041 | |
5042 | node = rb_first(&nn->unconf_name_tree); | |
5043 | while (node != NULL) { | |
5044 | tmp = node; | |
5045 | node = rb_next(tmp); | |
5046 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
5047 | rb_erase(tmp, &nn->unconf_name_tree); | |
5048 | destroy_client(clp); | |
5049 | } | |
5050 | ||
1872de0e | 5051 | kfree(nn->sessionid_hashtbl); |
20e9e2bc | 5052 | kfree(nn->lockowner_ino_hashtbl); |
9b531137 | 5053 | kfree(nn->ownerstr_hashtbl); |
0a7ec377 | 5054 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 5055 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 5056 | put_net(net); |
8daae4dc SK |
5057 | } |
5058 | ||
f252bc68 | 5059 | int |
d85ed443 | 5060 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 5061 | { |
5e1533c7 | 5062 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
5063 | int ret; |
5064 | ||
d85ed443 | 5065 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
5066 | if (ret) |
5067 | return ret; | |
5e1533c7 | 5068 | nfsd4_client_tracking_init(net); |
2c142baa | 5069 | nn->boot_time = get_seconds(); |
5ccb0066 | 5070 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 5071 | nn->grace_ended = false; |
d85ed443 | 5072 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
5284b44e SK |
5073 | nn->nfsd4_grace, net); |
5074 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); | |
d85ed443 SK |
5075 | return 0; |
5076 | } | |
5077 | ||
5078 | /* initialization to perform when the nfsd service is started: */ | |
5079 | ||
5080 | int | |
5081 | nfs4_state_start(void) | |
5082 | { | |
5083 | int ret; | |
5084 | ||
b5a1a81e | 5085 | ret = set_callback_cred(); |
d85ed443 SK |
5086 | if (ret) |
5087 | return -ENOMEM; | |
58da282b | 5088 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
5089 | if (laundry_wq == NULL) { |
5090 | ret = -ENOMEM; | |
5091 | goto out_recovery; | |
5092 | } | |
b5a1a81e BF |
5093 | ret = nfsd4_create_callback_queue(); |
5094 | if (ret) | |
5095 | goto out_free_laundry; | |
09121281 | 5096 | |
c2f1a551 | 5097 | set_max_delegations(); |
d85ed443 | 5098 | |
b5a1a81e | 5099 | return 0; |
d85ed443 | 5100 | |
b5a1a81e BF |
5101 | out_free_laundry: |
5102 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 5103 | out_recovery: |
b5a1a81e | 5104 | return ret; |
1da177e4 LT |
5105 | } |
5106 | ||
ac55fdc4 | 5107 | /* should be called with the state lock held */ |
f252bc68 | 5108 | void |
4dce0ac9 | 5109 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 5110 | { |
1da177e4 | 5111 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 5112 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 5113 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 5114 | |
4dce0ac9 SK |
5115 | cancel_delayed_work_sync(&nn->laundromat_work); |
5116 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 5117 | |
1da177e4 LT |
5118 | INIT_LIST_HEAD(&reaplist); |
5119 | spin_lock(&recall_lock); | |
e8c69d17 | 5120 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 LT |
5121 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
5122 | list_move(&dp->dl_recall_lru, &reaplist); | |
5123 | } | |
5124 | spin_unlock(&recall_lock); | |
5125 | list_for_each_safe(pos, next, &reaplist) { | |
5126 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3bd64a5b | 5127 | destroy_delegation(dp); |
1da177e4 LT |
5128 | } |
5129 | ||
3320fef1 | 5130 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 5131 | nfs4_state_destroy_net(net); |
1da177e4 LT |
5132 | } |
5133 | ||
5134 | void | |
5135 | nfs4_state_shutdown(void) | |
5136 | { | |
5e8d5c29 | 5137 | destroy_workqueue(laundry_wq); |
c3935e30 | 5138 | nfsd4_destroy_callback_queue(); |
1da177e4 | 5139 | } |
8b70484c TM |
5140 | |
5141 | static void | |
5142 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5143 | { | |
37c593c5 TM |
5144 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
5145 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
5146 | } |
5147 | ||
5148 | static void | |
5149 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
5150 | { | |
37c593c5 TM |
5151 | if (cstate->minorversion) { |
5152 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
5153 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
5154 | } | |
5155 | } | |
5156 | ||
5157 | void | |
5158 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
5159 | { | |
5160 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
5161 | } |
5162 | ||
62cd4a59 TM |
5163 | /* |
5164 | * functions to set current state id | |
5165 | */ | |
9428fe1a TM |
5166 | void |
5167 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5168 | { | |
5169 | put_stateid(cstate, &odp->od_stateid); | |
5170 | } | |
5171 | ||
8b70484c TM |
5172 | void |
5173 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
5174 | { | |
5175 | put_stateid(cstate, &open->op_stateid); | |
5176 | } | |
5177 | ||
62cd4a59 TM |
5178 | void |
5179 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5180 | { | |
5181 | put_stateid(cstate, &close->cl_stateid); | |
5182 | } | |
5183 | ||
5184 | void | |
5185 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
5186 | { | |
5187 | put_stateid(cstate, &lock->lk_resp_stateid); | |
5188 | } | |
5189 | ||
5190 | /* | |
5191 | * functions to consume current state id | |
5192 | */ | |
1e97b519 | 5193 | |
9428fe1a TM |
5194 | void |
5195 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
5196 | { | |
5197 | get_stateid(cstate, &odp->od_stateid); | |
5198 | } | |
5199 | ||
5200 | void | |
5201 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
5202 | { | |
5203 | get_stateid(cstate, &drp->dr_stateid); | |
5204 | } | |
5205 | ||
1e97b519 TM |
5206 | void |
5207 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
5208 | { | |
5209 | get_stateid(cstate, &fsp->fr_stateid); | |
5210 | } | |
5211 | ||
5212 | void | |
5213 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
5214 | { | |
5215 | get_stateid(cstate, &setattr->sa_stateid); | |
5216 | } | |
5217 | ||
8b70484c TM |
5218 | void |
5219 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
5220 | { | |
5221 | get_stateid(cstate, &close->cl_stateid); | |
5222 | } | |
5223 | ||
5224 | void | |
62cd4a59 | 5225 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 5226 | { |
62cd4a59 | 5227 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 5228 | } |
30813e27 TM |
5229 | |
5230 | void | |
5231 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
5232 | { | |
5233 | get_stateid(cstate, &read->rd_stateid); | |
5234 | } | |
5235 | ||
5236 | void | |
5237 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
5238 | { | |
5239 | get_stateid(cstate, &write->wr_stateid); | |
5240 | } |