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