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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
aceaf78d | 44 | #include <linux/file.h> |
1da177e4 LT |
45 | #include <linux/mount.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/kthread.h> | |
49 | #include <linux/nfs4.h> | |
50 | #include <linux/nfsd/state.h> | |
51 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 52 | #include <linux/namei.h> |
c2f1a551 | 53 | #include <linux/swap.h> |
353ab6e9 | 54 | #include <linux/mutex.h> |
fd85b817 | 55 | #include <linux/lockd/bind.h> |
9a8db97e | 56 | #include <linux/module.h> |
68e76ad0 | 57 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 58 | #include <linux/sunrpc/clnt.h> |
1da177e4 LT |
59 | |
60 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
61 | ||
62 | /* Globals */ | |
63 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 64 | static time_t user_lease_time = 90; |
fd39ca9a | 65 | static time_t boot_time; |
1da177e4 LT |
66 | static u32 current_ownerid = 1; |
67 | static u32 current_fileid = 1; | |
68 | static u32 current_delegid = 1; | |
69 | static u32 nfs4_init; | |
fd39ca9a N |
70 | static stateid_t zerostateid; /* bits all 0 */ |
71 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 72 | static u64 current_sessionid = 1; |
fd39ca9a N |
73 | |
74 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
75 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 76 | |
1da177e4 | 77 | /* forward declarations */ |
fd39ca9a | 78 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 79 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
80 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
81 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 82 | |
8b671b80 BF |
83 | /* Locking: */ |
84 | ||
85 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 86 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 87 | |
8b671b80 BF |
88 | /* |
89 | * Currently used for the del_recall_lru and file hash table. In an | |
90 | * effort to decrease the scope of the client_mutex, this spinlock may | |
91 | * eventually cover more: | |
92 | */ | |
93 | static DEFINE_SPINLOCK(recall_lock); | |
94 | ||
e18b890b CL |
95 | static struct kmem_cache *stateowner_slab = NULL; |
96 | static struct kmem_cache *file_slab = NULL; | |
97 | static struct kmem_cache *stateid_slab = NULL; | |
98 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 99 | |
1da177e4 LT |
100 | void |
101 | nfs4_lock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_lock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
106 | void | |
107 | nfs4_unlock_state(void) | |
108 | { | |
353ab6e9 | 109 | mutex_unlock(&client_mutex); |
1da177e4 LT |
110 | } |
111 | ||
112 | static inline u32 | |
113 | opaque_hashval(const void *ptr, int nbytes) | |
114 | { | |
115 | unsigned char *cptr = (unsigned char *) ptr; | |
116 | ||
117 | u32 x = 0; | |
118 | while (nbytes--) { | |
119 | x *= 37; | |
120 | x += *cptr++; | |
121 | } | |
122 | return x; | |
123 | } | |
124 | ||
1da177e4 LT |
125 | static struct list_head del_recall_lru; |
126 | ||
13cd2184 N |
127 | static inline void |
128 | put_nfs4_file(struct nfs4_file *fi) | |
129 | { | |
8b671b80 BF |
130 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
131 | list_del(&fi->fi_hash); | |
132 | spin_unlock(&recall_lock); | |
133 | iput(fi->fi_inode); | |
134 | kmem_cache_free(file_slab, fi); | |
135 | } | |
13cd2184 N |
136 | } |
137 | ||
138 | static inline void | |
139 | get_nfs4_file(struct nfs4_file *fi) | |
140 | { | |
8b671b80 | 141 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
142 | } |
143 | ||
ef0f3390 | 144 | static int num_delegations; |
c2f1a551 | 145 | unsigned int max_delegations; |
ef0f3390 N |
146 | |
147 | /* | |
148 | * Open owner state (share locks) | |
149 | */ | |
150 | ||
151 | /* hash tables for nfs4_stateowner */ | |
152 | #define OWNER_HASH_BITS 8 | |
153 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
154 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
155 | ||
156 | #define ownerid_hashval(id) \ | |
157 | ((id) & OWNER_HASH_MASK) | |
158 | #define ownerstr_hashval(clientid, ownername) \ | |
159 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
160 | ||
161 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
162 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
163 | ||
164 | /* hash table for nfs4_file */ | |
165 | #define FILE_HASH_BITS 8 | |
166 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
167 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
168 | /* hash table for (open)nfs4_stateid */ | |
169 | #define STATEID_HASH_BITS 10 | |
170 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
171 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
172 | ||
173 | #define file_hashval(x) \ | |
174 | hash_ptr(x, FILE_HASH_BITS) | |
175 | #define stateid_hashval(owner_id, file_id) \ | |
176 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
177 | ||
178 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
179 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
180 | ||
1da177e4 LT |
181 | static struct nfs4_delegation * |
182 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
183 | { | |
184 | struct nfs4_delegation *dp; | |
185 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 186 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
187 | |
188 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
189 | if (fp->fi_had_conflict) |
190 | return NULL; | |
c2f1a551 | 191 | if (num_delegations > max_delegations) |
ef0f3390 | 192 | return NULL; |
5b2d21c1 N |
193 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
194 | if (dp == NULL) | |
1da177e4 | 195 | return dp; |
ef0f3390 | 196 | num_delegations++; |
ea1da636 N |
197 | INIT_LIST_HEAD(&dp->dl_perfile); |
198 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
199 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
200 | dp->dl_client = clp; | |
13cd2184 | 201 | get_nfs4_file(fp); |
1da177e4 LT |
202 | dp->dl_file = fp; |
203 | dp->dl_flock = NULL; | |
204 | get_file(stp->st_vfs_file); | |
205 | dp->dl_vfs_file = stp->st_vfs_file; | |
206 | dp->dl_type = type; | |
b53d40c5 | 207 | dp->dl_ident = cb->cb_ident; |
78155ed7 | 208 | dp->dl_stateid.si_boot = get_seconds(); |
1da177e4 LT |
209 | dp->dl_stateid.si_stateownerid = current_delegid++; |
210 | dp->dl_stateid.si_fileid = 0; | |
211 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 212 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
213 | dp->dl_time = 0; |
214 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
215 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
216 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
217 | return dp; |
218 | } | |
219 | ||
220 | void | |
221 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
222 | { | |
223 | if (atomic_dec_and_test(&dp->dl_count)) { | |
224 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 225 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 226 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 227 | num_delegations--; |
1da177e4 LT |
228 | } |
229 | } | |
230 | ||
231 | /* Remove the associated file_lock first, then remove the delegation. | |
232 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
233 | * the i_flock list, eventually calling nfsd's lock_manager | |
234 | * fl_release_callback. | |
235 | */ | |
236 | static void | |
237 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
238 | { | |
239 | struct file *filp = dp->dl_vfs_file; | |
240 | ||
241 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
242 | dp->dl_vfs_file = NULL; | |
243 | /* The following nfsd_close may not actually close the file, | |
244 | * but we want to remove the lease in any case. */ | |
c907132d | 245 | if (dp->dl_flock) |
a9933cea | 246 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 247 | nfsd_close(filp); |
1da177e4 LT |
248 | } |
249 | ||
250 | /* Called under the state lock. */ | |
251 | static void | |
252 | unhash_delegation(struct nfs4_delegation *dp) | |
253 | { | |
ea1da636 N |
254 | list_del_init(&dp->dl_perfile); |
255 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
256 | spin_lock(&recall_lock); |
257 | list_del_init(&dp->dl_recall_lru); | |
258 | spin_unlock(&recall_lock); | |
259 | nfs4_close_delegation(dp); | |
260 | nfs4_put_delegation(dp); | |
261 | } | |
262 | ||
263 | /* | |
264 | * SETCLIENTID state | |
265 | */ | |
266 | ||
267 | /* Hash tables for nfs4_clientid state */ | |
268 | #define CLIENT_HASH_BITS 4 | |
269 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
270 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
271 | ||
272 | #define clientid_hashval(id) \ | |
273 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
274 | #define clientstr_hashval(name) \ |
275 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
276 | /* |
277 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
278 | * used in reboot/reset lease grace period processing | |
279 | * | |
280 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
281 | * setclientid_confirmed info. | |
282 | * | |
283 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
284 | * setclientid info. | |
285 | * | |
286 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
287 | * for lease renewal. | |
288 | * | |
289 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
290 | * for last close replay. | |
291 | */ | |
292 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
293 | static int reclaim_str_hashtbl_size = 0; | |
294 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
295 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
296 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
297 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
298 | static struct list_head client_lru; | |
299 | static struct list_head close_lru; | |
300 | ||
2283963f BF |
301 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
302 | { | |
303 | list_del(&stp->st_hash); | |
304 | list_del(&stp->st_perfile); | |
305 | list_del(&stp->st_perstateowner); | |
306 | } | |
307 | ||
308 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
309 | { | |
310 | put_nfs4_file(stp->st_file); | |
311 | kmem_cache_free(stateid_slab, stp); | |
312 | } | |
313 | ||
314 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
315 | { | |
316 | unhash_generic_stateid(stp); | |
317 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
318 | free_generic_stateid(stp); | |
319 | } | |
320 | ||
f044ff83 BF |
321 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
322 | { | |
323 | struct nfs4_stateid *stp; | |
324 | ||
325 | list_del(&sop->so_idhash); | |
326 | list_del(&sop->so_strhash); | |
327 | list_del(&sop->so_perstateid); | |
328 | while (!list_empty(&sop->so_stateids)) { | |
329 | stp = list_first_entry(&sop->so_stateids, | |
330 | struct nfs4_stateid, st_perstateowner); | |
331 | release_lock_stateid(stp); | |
332 | } | |
333 | } | |
334 | ||
335 | static void release_lockowner(struct nfs4_stateowner *sop) | |
336 | { | |
337 | unhash_lockowner(sop); | |
338 | nfs4_put_stateowner(sop); | |
339 | } | |
340 | ||
f1d110ca BF |
341 | static void |
342 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
343 | { | |
344 | struct nfs4_stateowner *lock_sop; | |
345 | ||
346 | while (!list_empty(&open_stp->st_lockowners)) { | |
347 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
348 | struct nfs4_stateowner, so_perstateid); | |
349 | /* list_del(&open_stp->st_lockowners); */ | |
350 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 351 | release_lockowner(lock_sop); |
f1d110ca BF |
352 | } |
353 | } | |
354 | ||
2283963f BF |
355 | static void release_open_stateid(struct nfs4_stateid *stp) |
356 | { | |
357 | unhash_generic_stateid(stp); | |
358 | release_stateid_lockowners(stp); | |
359 | nfsd_close(stp->st_vfs_file); | |
360 | free_generic_stateid(stp); | |
361 | } | |
362 | ||
f044ff83 | 363 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
364 | { |
365 | struct nfs4_stateid *stp; | |
366 | ||
367 | list_del(&sop->so_idhash); | |
368 | list_del(&sop->so_strhash); | |
f044ff83 BF |
369 | list_del(&sop->so_perclient); |
370 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 371 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
372 | stp = list_first_entry(&sop->so_stateids, |
373 | struct nfs4_stateid, st_perstateowner); | |
374 | release_open_stateid(stp); | |
f1d110ca BF |
375 | } |
376 | } | |
377 | ||
f044ff83 | 378 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 379 | { |
f044ff83 | 380 | unhash_openowner(sop); |
f1d110ca BF |
381 | list_del(&sop->so_close_lru); |
382 | nfs4_put_stateowner(sop); | |
383 | } | |
384 | ||
5282fd72 ME |
385 | static DEFINE_SPINLOCK(sessionid_lock); |
386 | #define SESSION_HASH_SIZE 512 | |
387 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
388 | ||
389 | static inline int | |
390 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
391 | { | |
392 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
393 | ||
394 | return sid->sequence % SESSION_HASH_SIZE; | |
395 | } | |
396 | ||
397 | static inline void | |
398 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
399 | { | |
400 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
401 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
402 | } | |
403 | ||
ec6b5d7b AA |
404 | static void |
405 | gen_sessionid(struct nfsd4_session *ses) | |
406 | { | |
407 | struct nfs4_client *clp = ses->se_client; | |
408 | struct nfsd4_sessionid *sid; | |
409 | ||
410 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
411 | sid->clientid = clp->cl_clientid; | |
412 | sid->sequence = current_sessionid++; | |
413 | sid->reserved = 0; | |
414 | } | |
415 | ||
416 | /* | |
a649637c AA |
417 | * The protocol defines ca_maxresponssize_cached to include the size of |
418 | * the rpc header, but all we need to cache is the data starting after | |
419 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
420 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
421 | * value that is the number of bytes in our cache plus a few additional | |
422 | * bytes. In order to stay on the safe side, and not promise more than | |
423 | * we can cache, those additional bytes must be the minimum possible: 24 | |
424 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
425 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
426 | * for the SEQUENCE op response: | |
427 | */ | |
428 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
429 | ||
430 | /* | |
431 | * Give the client the number of ca_maxresponsesize_cached slots it | |
432 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
433 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
434 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 435 | * |
a649637c AA |
436 | * If we run out of reserved DRC memory we should (up to a point) |
437 | * re-negotiate active sessions and reduce their slot usage to make | |
438 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 439 | */ |
a649637c | 440 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 441 | { |
a649637c | 442 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 443 | |
5d77ddfb AA |
444 | if (fchan->maxreqs < 1) |
445 | return nfserr_inval; | |
5d77ddfb | 446 | |
a649637c AA |
447 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
448 | size = NFSD_MIN_HDR_SEQ_SZ; | |
449 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
450 | if (size > NFSD_SLOT_CACHE_SIZE) | |
451 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 452 | |
a649637c AA |
453 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
454 | mem = fchan->maxreqs * size; | |
455 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
456 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
457 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
458 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
459 | mem = fchan->maxreqs * size; | |
460 | } | |
ec6b5d7b | 461 | |
4bd9b0f4 | 462 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
463 | /* bound the total session drc memory ussage */ |
464 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
465 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
466 | mem = fchan->maxreqs * size; | |
467 | } | |
0c193054 | 468 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 469 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 470 | |
b101ebbc | 471 | if (fchan->maxreqs == 0) |
bdac86e2 | 472 | return nfserr_serverfault; |
a649637c AA |
473 | |
474 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 475 | return 0; |
ec6b5d7b AA |
476 | } |
477 | ||
478 | /* | |
479 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 480 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
481 | */ |
482 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
483 | struct nfsd4_channel_attrs *session_fchan, |
484 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
485 | { |
486 | int status = 0; | |
ddc04fd4 | 487 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
488 | |
489 | /* headerpadsz set to zero in encode routine */ | |
490 | ||
491 | /* Use the client's max request and max response size if possible */ | |
492 | if (fchan->maxreq_sz > maxcount) | |
493 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 494 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
495 | |
496 | if (fchan->maxresp_sz > maxcount) | |
497 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 498 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 499 | |
ec6b5d7b AA |
500 | /* Use the client's maxops if possible */ |
501 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
502 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 503 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 504 | |
ec6b5d7b AA |
505 | /* FIXME: Error means no more DRC pages so the server should |
506 | * recover pages from existing sessions. For now fail session | |
507 | * creation. | |
508 | */ | |
a649637c | 509 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 510 | |
a649637c | 511 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 512 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
513 | |
514 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
515 | return status; |
516 | } | |
517 | ||
557ce264 AA |
518 | static void |
519 | free_session_slots(struct nfsd4_session *ses) | |
520 | { | |
521 | int i; | |
522 | ||
523 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
524 | kfree(ses->se_slots[i]); | |
525 | } | |
526 | ||
efe0cb6d BF |
527 | /* |
528 | * We don't actually need to cache the rpc and session headers, so we | |
529 | * can allocate a little less for each slot: | |
530 | */ | |
531 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
532 | { | |
533 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
534 | } | |
535 | ||
ec6b5d7b AA |
536 | static int |
537 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
538 | struct nfsd4_create_session *cses) | |
539 | { | |
540 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
541 | struct nfsd4_slot *sp; |
542 | int idx, slotsize, cachesize, i; | |
543 | int status; | |
ec6b5d7b AA |
544 | |
545 | memset(&tmp, 0, sizeof(tmp)); | |
546 | ||
547 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
548 | tmp.se_bchannel = cses->back_channel; |
549 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
550 | &cses->fore_channel); | |
ec6b5d7b AA |
551 | if (status) |
552 | goto out; | |
553 | ||
557ce264 AA |
554 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
555 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
556 | ||
557 | status = nfserr_serverfault; | |
558 | /* allocate struct nfsd4_session and slot table pointers in one piece */ | |
559 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
560 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
561 | if (!new) | |
562 | goto out; | |
563 | ||
564 | memcpy(new, &tmp, sizeof(*new)); | |
565 | ||
557ce264 | 566 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 567 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
568 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
569 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
570 | if (!sp) | |
571 | goto out_free; | |
572 | new->se_slots[i] = sp; | |
573 | } | |
574 | ||
ec6b5d7b AA |
575 | new->se_client = clp; |
576 | gen_sessionid(new); | |
577 | idx = hash_sessionid(&new->se_sessionid); | |
578 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
579 | NFS4_MAX_SESSIONID_LEN); | |
580 | ||
581 | new->se_flags = cses->flags; | |
582 | kref_init(&new->se_ref); | |
583 | spin_lock(&sessionid_lock); | |
584 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); | |
585 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
586 | spin_unlock(&sessionid_lock); | |
587 | ||
588 | status = nfs_ok; | |
589 | out: | |
590 | return status; | |
557ce264 AA |
591 | out_free: |
592 | free_session_slots(new); | |
593 | kfree(new); | |
594 | goto out; | |
ec6b5d7b AA |
595 | } |
596 | ||
5282fd72 ME |
597 | /* caller must hold sessionid_lock */ |
598 | static struct nfsd4_session * | |
599 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
600 | { | |
601 | struct nfsd4_session *elem; | |
602 | int idx; | |
603 | ||
604 | dump_sessionid(__func__, sessionid); | |
605 | idx = hash_sessionid(sessionid); | |
606 | dprintk("%s: idx is %d\n", __func__, idx); | |
607 | /* Search in the appropriate list */ | |
608 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
609 | dump_sessionid("list traversal", &elem->se_sessionid); | |
610 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
611 | NFS4_MAX_SESSIONID_LEN)) { | |
612 | return elem; | |
613 | } | |
614 | } | |
615 | ||
616 | dprintk("%s: session not found\n", __func__); | |
617 | return NULL; | |
618 | } | |
619 | ||
620 | /* caller must hold sessionid_lock */ | |
7116ed6b | 621 | static void |
5282fd72 | 622 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
623 | { |
624 | list_del(&ses->se_hash); | |
625 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
626 | } |
627 | ||
628 | static void | |
629 | release_session(struct nfsd4_session *ses) | |
630 | { | |
631 | spin_lock(&sessionid_lock); | |
632 | unhash_session(ses); | |
633 | spin_unlock(&sessionid_lock); | |
7116ed6b AA |
634 | nfsd4_put_session(ses); |
635 | } | |
636 | ||
637 | void | |
638 | free_session(struct kref *kref) | |
639 | { | |
640 | struct nfsd4_session *ses; | |
dd829c45 | 641 | int mem; |
7116ed6b AA |
642 | |
643 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 644 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 645 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 646 | nfsd_drc_mem_used -= mem; |
be98d1bb | 647 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 648 | free_session_slots(ses); |
7116ed6b AA |
649 | kfree(ses); |
650 | } | |
651 | ||
1da177e4 LT |
652 | static inline void |
653 | renew_client(struct nfs4_client *clp) | |
654 | { | |
655 | /* | |
656 | * Move client to the end to the LRU list. | |
657 | */ | |
658 | dprintk("renewing client (clientid %08x/%08x)\n", | |
659 | clp->cl_clientid.cl_boot, | |
660 | clp->cl_clientid.cl_id); | |
661 | list_move_tail(&clp->cl_lru, &client_lru); | |
662 | clp->cl_time = get_seconds(); | |
663 | } | |
664 | ||
665 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
666 | static int | |
667 | STALE_CLIENTID(clientid_t *clid) | |
668 | { | |
669 | if (clid->cl_boot == boot_time) | |
670 | return 0; | |
60adfc50 AA |
671 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
672 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
673 | return 1; |
674 | } | |
675 | ||
676 | /* | |
677 | * XXX Should we use a slab cache ? | |
678 | * This type of memory management is somewhat inefficient, but we use it | |
679 | * anyway since SETCLIENTID is not a common operation. | |
680 | */ | |
35bba9a3 | 681 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
682 | { |
683 | struct nfs4_client *clp; | |
684 | ||
35bba9a3 BF |
685 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
686 | if (clp == NULL) | |
687 | return NULL; | |
688 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
689 | if (clp->cl_name.data == NULL) { | |
690 | kfree(clp); | |
691 | return NULL; | |
1da177e4 | 692 | } |
35bba9a3 BF |
693 | memcpy(clp->cl_name.data, name.data, name.len); |
694 | clp->cl_name.len = name.len; | |
1da177e4 LT |
695 | return clp; |
696 | } | |
697 | ||
1b1a9b31 BF |
698 | static void |
699 | shutdown_callback_client(struct nfs4_client *clp) | |
700 | { | |
c237dc03 | 701 | struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; |
1b1a9b31 | 702 | |
1b1a9b31 | 703 | if (clnt) { |
404ec117 BF |
704 | /* |
705 | * Callback threads take a reference on the client, so there | |
706 | * should be no outstanding callbacks at this point. | |
707 | */ | |
c237dc03 | 708 | clp->cl_cb_conn.cb_client = NULL; |
1b1a9b31 BF |
709 | rpc_shutdown_client(clnt); |
710 | } | |
711 | } | |
712 | ||
1da177e4 LT |
713 | static inline void |
714 | free_client(struct nfs4_client *clp) | |
715 | { | |
1b1a9b31 | 716 | shutdown_callback_client(clp); |
38524ab3 AA |
717 | if (clp->cl_cb_xprt) |
718 | svc_xprt_put(clp->cl_cb_xprt); | |
1da177e4 LT |
719 | if (clp->cl_cred.cr_group_info) |
720 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 721 | kfree(clp->cl_principal); |
1da177e4 LT |
722 | kfree(clp->cl_name.data); |
723 | kfree(clp); | |
724 | } | |
725 | ||
726 | void | |
727 | put_nfs4_client(struct nfs4_client *clp) | |
728 | { | |
729 | if (atomic_dec_and_test(&clp->cl_count)) | |
730 | free_client(clp); | |
731 | } | |
732 | ||
733 | static void | |
734 | expire_client(struct nfs4_client *clp) | |
735 | { | |
736 | struct nfs4_stateowner *sop; | |
737 | struct nfs4_delegation *dp; | |
1da177e4 LT |
738 | struct list_head reaplist; |
739 | ||
740 | dprintk("NFSD: expire_client cl_count %d\n", | |
741 | atomic_read(&clp->cl_count)); | |
742 | ||
1da177e4 LT |
743 | INIT_LIST_HEAD(&reaplist); |
744 | spin_lock(&recall_lock); | |
ea1da636 N |
745 | while (!list_empty(&clp->cl_delegations)) { |
746 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
747 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
748 | dp->dl_flock); | |
ea1da636 | 749 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
750 | list_move(&dp->dl_recall_lru, &reaplist); |
751 | } | |
752 | spin_unlock(&recall_lock); | |
753 | while (!list_empty(&reaplist)) { | |
754 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
755 | list_del_init(&dp->dl_recall_lru); | |
756 | unhash_delegation(dp); | |
757 | } | |
758 | list_del(&clp->cl_idhash); | |
759 | list_del(&clp->cl_strhash); | |
760 | list_del(&clp->cl_lru); | |
ea1da636 N |
761 | while (!list_empty(&clp->cl_openowners)) { |
762 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 763 | release_openowner(sop); |
1da177e4 | 764 | } |
c4bf7868 ME |
765 | while (!list_empty(&clp->cl_sessions)) { |
766 | struct nfsd4_session *ses; | |
767 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
768 | se_perclnt); | |
769 | release_session(ses); | |
770 | } | |
1da177e4 LT |
771 | put_nfs4_client(clp); |
772 | } | |
773 | ||
35bba9a3 BF |
774 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
775 | { | |
776 | memcpy(target->cl_verifier.data, source->data, | |
777 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
778 | } |
779 | ||
35bba9a3 BF |
780 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
781 | { | |
1da177e4 LT |
782 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
783 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
784 | } | |
785 | ||
35bba9a3 BF |
786 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
787 | { | |
1da177e4 LT |
788 | target->cr_uid = source->cr_uid; |
789 | target->cr_gid = source->cr_gid; | |
790 | target->cr_group_info = source->cr_group_info; | |
791 | get_group_info(target->cr_group_info); | |
792 | } | |
793 | ||
35bba9a3 | 794 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 795 | { |
a55370a3 | 796 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
797 | } |
798 | ||
799 | static int | |
599e0a22 BF |
800 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
801 | { | |
802 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
803 | } |
804 | ||
805 | static int | |
599e0a22 BF |
806 | same_clid(clientid_t *cl1, clientid_t *cl2) |
807 | { | |
808 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
809 | } |
810 | ||
811 | /* XXX what about NGROUP */ | |
812 | static int | |
599e0a22 BF |
813 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
814 | { | |
815 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
816 | } |
817 | ||
5ec7b46c BF |
818 | static void gen_clid(struct nfs4_client *clp) |
819 | { | |
820 | static u32 current_clientid = 1; | |
821 | ||
1da177e4 LT |
822 | clp->cl_clientid.cl_boot = boot_time; |
823 | clp->cl_clientid.cl_id = current_clientid++; | |
824 | } | |
825 | ||
deda2faa BF |
826 | static void gen_confirm(struct nfs4_client *clp) |
827 | { | |
828 | static u32 i; | |
829 | u32 *p; | |
1da177e4 | 830 | |
1da177e4 | 831 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
832 | *p++ = get_seconds(); |
833 | *p++ = i++; | |
1da177e4 LT |
834 | } |
835 | ||
b09333c4 RL |
836 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
837 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
838 | { | |
839 | struct nfs4_client *clp; | |
840 | struct sockaddr *sa = svc_addr(rqstp); | |
841 | char *princ; | |
842 | ||
843 | clp = alloc_client(name); | |
844 | if (clp == NULL) | |
845 | return NULL; | |
846 | ||
847 | princ = svc_gss_principal(rqstp); | |
848 | if (princ) { | |
849 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
850 | if (clp->cl_principal == NULL) { | |
851 | free_client(clp); | |
852 | return NULL; | |
853 | } | |
854 | } | |
855 | ||
856 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
857 | atomic_set(&clp->cl_count, 1); | |
858 | atomic_set(&clp->cl_cb_conn.cb_set, 0); | |
859 | INIT_LIST_HEAD(&clp->cl_idhash); | |
860 | INIT_LIST_HEAD(&clp->cl_strhash); | |
861 | INIT_LIST_HEAD(&clp->cl_openowners); | |
862 | INIT_LIST_HEAD(&clp->cl_delegations); | |
863 | INIT_LIST_HEAD(&clp->cl_sessions); | |
864 | INIT_LIST_HEAD(&clp->cl_lru); | |
865 | clear_bit(0, &clp->cl_cb_slot_busy); | |
866 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
867 | copy_verf(clp, verf); | |
868 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
869 | clp->cl_flavor = rqstp->rq_flavor; | |
870 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
871 | gen_confirm(clp); | |
872 | ||
873 | return clp; | |
874 | } | |
875 | ||
35bba9a3 BF |
876 | static int check_name(struct xdr_netobj name) |
877 | { | |
1da177e4 LT |
878 | if (name.len == 0) |
879 | return 0; | |
880 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 881 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
882 | return 0; |
883 | } | |
884 | return 1; | |
885 | } | |
886 | ||
fd39ca9a | 887 | static void |
1da177e4 LT |
888 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
889 | { | |
890 | unsigned int idhashval; | |
891 | ||
892 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
893 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
894 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
895 | list_add_tail(&clp->cl_lru, &client_lru); | |
896 | clp->cl_time = get_seconds(); | |
897 | } | |
898 | ||
fd39ca9a | 899 | static void |
1da177e4 LT |
900 | move_to_confirmed(struct nfs4_client *clp) |
901 | { | |
902 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
903 | unsigned int strhashval; | |
904 | ||
905 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
906 | list_del_init(&clp->cl_strhash); | |
f116629d | 907 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 908 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
909 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
910 | renew_client(clp); | |
911 | } | |
912 | ||
913 | static struct nfs4_client * | |
914 | find_confirmed_client(clientid_t *clid) | |
915 | { | |
916 | struct nfs4_client *clp; | |
917 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
918 | ||
919 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 920 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
921 | return clp; |
922 | } | |
923 | return NULL; | |
924 | } | |
925 | ||
926 | static struct nfs4_client * | |
927 | find_unconfirmed_client(clientid_t *clid) | |
928 | { | |
929 | struct nfs4_client *clp; | |
930 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
931 | ||
932 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 933 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
934 | return clp; |
935 | } | |
936 | return NULL; | |
937 | } | |
938 | ||
a1bcecd2 AA |
939 | /* |
940 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
941 | * parameter. Matching is based on the fact the at least one of the | |
942 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
943 | * | |
944 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
945 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
946 | * and SET_CLIENTID{,_CONFIRM} | |
947 | */ | |
948 | static inline int | |
949 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
950 | { | |
951 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
952 | return use_exchange_id == has_exchange_flags; | |
953 | } | |
954 | ||
28ce6054 | 955 | static struct nfs4_client * |
a1bcecd2 AA |
956 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
957 | bool use_exchange_id) | |
28ce6054 N |
958 | { |
959 | struct nfs4_client *clp; | |
960 | ||
961 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
962 | if (same_name(clp->cl_recdir, dname) && |
963 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
964 | return clp; |
965 | } | |
966 | return NULL; | |
967 | } | |
968 | ||
969 | static struct nfs4_client * | |
a1bcecd2 AA |
970 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
971 | bool use_exchange_id) | |
28ce6054 N |
972 | { |
973 | struct nfs4_client *clp; | |
974 | ||
975 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
976 | if (same_name(clp->cl_recdir, dname) && |
977 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
978 | return clp; |
979 | } | |
980 | return NULL; | |
981 | } | |
982 | ||
fd39ca9a | 983 | static void |
fbf4665f | 984 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 985 | { |
c237dc03 | 986 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
987 | unsigned short expected_family; |
988 | ||
989 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
990 | if (se->se_callback_netid_len == 3 && | |
991 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
992 | expected_family = AF_INET; | |
993 | else if (se->se_callback_netid_len == 4 && | |
994 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
995 | expected_family = AF_INET6; | |
996 | else | |
1da177e4 LT |
997 | goto out_err; |
998 | ||
aa9a4ec7 JL |
999 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
1000 | se->se_callback_addr_len, | |
1001 | (struct sockaddr *) &cb->cb_addr, | |
1002 | sizeof(cb->cb_addr)); | |
1003 | ||
7077ecba | 1004 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 1005 | goto out_err; |
aa9a4ec7 | 1006 | |
fbf4665f JL |
1007 | if (cb->cb_addr.ss_family == AF_INET6) |
1008 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
1009 | ||
ab52ae6d | 1010 | cb->cb_minorversion = 0; |
1da177e4 LT |
1011 | cb->cb_prog = se->se_callback_prog; |
1012 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1013 | return; |
1014 | out_err: | |
aa9a4ec7 JL |
1015 | cb->cb_addr.ss_family = AF_UNSPEC; |
1016 | cb->cb_addrlen = 0; | |
849823c5 | 1017 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1018 | "will not receive delegations\n", |
1019 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1020 | ||
1da177e4 LT |
1021 | return; |
1022 | } | |
1023 | ||
074fe897 | 1024 | /* |
557ce264 | 1025 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1026 | */ |
074fe897 AA |
1027 | void |
1028 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1029 | { |
557ce264 AA |
1030 | struct nfsd4_slot *slot = resp->cstate.slot; |
1031 | unsigned int base; | |
074fe897 | 1032 | |
557ce264 | 1033 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1034 | |
557ce264 AA |
1035 | slot->sl_opcnt = resp->opcnt; |
1036 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1037 | |
bf864a31 | 1038 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1039 | slot->sl_datalen = 0; |
bf864a31 | 1040 | return; |
074fe897 | 1041 | } |
557ce264 AA |
1042 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1043 | base = (char *)resp->cstate.datap - | |
1044 | (char *)resp->xbuf->head[0].iov_base; | |
1045 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1046 | slot->sl_datalen)) | |
1047 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1048 | return; | |
074fe897 AA |
1049 | } |
1050 | ||
1051 | /* | |
abfabf8c AA |
1052 | * Encode the replay sequence operation from the slot values. |
1053 | * If cachethis is FALSE encode the uncached rep error on the next | |
1054 | * operation which sets resp->p and increments resp->opcnt for | |
1055 | * nfs4svc_encode_compoundres. | |
074fe897 | 1056 | * |
074fe897 | 1057 | */ |
abfabf8c AA |
1058 | static __be32 |
1059 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1060 | struct nfsd4_compoundres *resp) | |
074fe897 | 1061 | { |
abfabf8c AA |
1062 | struct nfsd4_op *op; |
1063 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1064 | |
abfabf8c | 1065 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1066 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1067 | |
abfabf8c AA |
1068 | /* Encode the replayed sequence operation */ |
1069 | op = &args->ops[resp->opcnt - 1]; | |
1070 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1071 | |
abfabf8c | 1072 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1073 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1074 | op = &args->ops[resp->opcnt++]; |
1075 | op->status = nfserr_retry_uncached_rep; | |
1076 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1077 | } |
abfabf8c | 1078 | return op->status; |
074fe897 AA |
1079 | } |
1080 | ||
1081 | /* | |
557ce264 AA |
1082 | * The sequence operation is not cached because we can use the slot and |
1083 | * session values. | |
074fe897 AA |
1084 | */ |
1085 | __be32 | |
bf864a31 AA |
1086 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1087 | struct nfsd4_sequence *seq) | |
074fe897 | 1088 | { |
557ce264 | 1089 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1090 | __be32 status; |
1091 | ||
557ce264 | 1092 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1093 | |
abfabf8c AA |
1094 | /* Either returns 0 or nfserr_retry_uncached */ |
1095 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1096 | if (status == nfserr_retry_uncached_rep) | |
1097 | return status; | |
074fe897 | 1098 | |
557ce264 AA |
1099 | /* The sequence operation has been encoded, cstate->datap set. */ |
1100 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1101 | |
557ce264 AA |
1102 | resp->opcnt = slot->sl_opcnt; |
1103 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1104 | status = slot->sl_status; | |
074fe897 AA |
1105 | |
1106 | return status; | |
1107 | } | |
1108 | ||
0733d213 AA |
1109 | /* |
1110 | * Set the exchange_id flags returned by the server. | |
1111 | */ | |
1112 | static void | |
1113 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1114 | { | |
1115 | /* pNFS is not supported */ | |
1116 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1117 | ||
1118 | /* Referrals are supported, Migration is not. */ | |
1119 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1120 | ||
1121 | /* set the wire flags to return to client. */ | |
1122 | clid->flags = new->cl_exchange_flags; | |
1123 | } | |
1124 | ||
069b6ad4 AA |
1125 | __be32 |
1126 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1127 | struct nfsd4_compound_state *cstate, | |
1128 | struct nfsd4_exchange_id *exid) | |
1129 | { | |
0733d213 AA |
1130 | struct nfs4_client *unconf, *conf, *new; |
1131 | int status; | |
1132 | unsigned int strhashval; | |
1133 | char dname[HEXDIR_LEN]; | |
363168b4 | 1134 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1135 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1136 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1137 | |
363168b4 | 1138 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1139 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1140 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1141 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1142 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1143 | |
1144 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1145 | return nfserr_inval; | |
1146 | ||
1147 | /* Currently only support SP4_NONE */ | |
1148 | switch (exid->spa_how) { | |
1149 | case SP4_NONE: | |
1150 | break; | |
1151 | case SP4_SSV: | |
1152 | return nfserr_encr_alg_unsupp; | |
1153 | default: | |
1154 | BUG(); /* checked by xdr code */ | |
1155 | case SP4_MACH_CRED: | |
1156 | return nfserr_serverfault; /* no excuse :-/ */ | |
1157 | } | |
1158 | ||
1159 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1160 | ||
1161 | if (status) | |
1162 | goto error; | |
1163 | ||
1164 | strhashval = clientstr_hashval(dname); | |
1165 | ||
1166 | nfs4_lock_state(); | |
1167 | status = nfs_ok; | |
1168 | ||
a1bcecd2 | 1169 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1170 | if (conf) { |
1171 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1172 | /* 18.35.4 case 8 */ | |
1173 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1174 | status = nfserr_not_same; | |
1175 | goto out; | |
1176 | } | |
1177 | /* Client reboot: destroy old state */ | |
1178 | expire_client(conf); | |
1179 | goto out_new; | |
1180 | } | |
1181 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1182 | /* 18.35.4 case 9 */ | |
1183 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1184 | status = nfserr_perm; | |
1185 | goto out; | |
1186 | } | |
1187 | expire_client(conf); | |
1188 | goto out_new; | |
1189 | } | |
0733d213 AA |
1190 | /* |
1191 | * Set bit when the owner id and verifier map to an already | |
1192 | * confirmed client id (18.35.3). | |
1193 | */ | |
1194 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1195 | ||
1196 | /* | |
1197 | * Falling into 18.35.4 case 2, possible router replay. | |
1198 | * Leave confirmed record intact and return same result. | |
1199 | */ | |
1200 | copy_verf(conf, &verf); | |
1201 | new = conf; | |
1202 | goto out_copy; | |
6ddbbbfe MS |
1203 | } |
1204 | ||
1205 | /* 18.35.4 case 7 */ | |
1206 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1207 | status = nfserr_noent; | |
1208 | goto out; | |
0733d213 AA |
1209 | } |
1210 | ||
a1bcecd2 | 1211 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1212 | if (unconf) { |
1213 | /* | |
1214 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1215 | * a new unconfirmed record should be generated regardless | |
1216 | * of whether any properties have changed. | |
1217 | */ | |
1218 | expire_client(unconf); | |
1219 | } | |
1220 | ||
1221 | out_new: | |
1222 | /* Normal case */ | |
b09333c4 | 1223 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1224 | if (new == NULL) { |
bdac86e2 | 1225 | status = nfserr_serverfault; |
0733d213 AA |
1226 | goto out; |
1227 | } | |
1228 | ||
0733d213 | 1229 | gen_clid(new); |
0733d213 AA |
1230 | add_to_unconfirmed(new, strhashval); |
1231 | out_copy: | |
1232 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1233 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1234 | ||
38eb76a5 | 1235 | exid->seqid = 1; |
0733d213 AA |
1236 | nfsd4_set_ex_flags(new, exid); |
1237 | ||
1238 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1239 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1240 | status = nfs_ok; |
1241 | ||
1242 | out: | |
1243 | nfs4_unlock_state(); | |
1244 | error: | |
1245 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1246 | return status; | |
069b6ad4 AA |
1247 | } |
1248 | ||
b85d4c01 | 1249 | static int |
88e588d5 | 1250 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1251 | { |
88e588d5 AA |
1252 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1253 | slot_seqid); | |
b85d4c01 BH |
1254 | |
1255 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1256 | if (slot_inuse) { |
1257 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1258 | return nfserr_jukebox; |
1259 | else | |
1260 | return nfserr_seq_misordered; | |
1261 | } | |
1262 | /* Normal */ | |
88e588d5 | 1263 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1264 | return nfs_ok; |
1265 | /* Replay */ | |
88e588d5 | 1266 | if (seqid == slot_seqid) |
b85d4c01 BH |
1267 | return nfserr_replay_cache; |
1268 | /* Wraparound */ | |
88e588d5 | 1269 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1270 | return nfs_ok; |
1271 | /* Misordered replay or misordered new request */ | |
1272 | return nfserr_seq_misordered; | |
1273 | } | |
1274 | ||
49557cc7 AA |
1275 | /* |
1276 | * Cache the create session result into the create session single DRC | |
1277 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1278 | * Do this for solo or embedded create session operations. | |
1279 | */ | |
1280 | static void | |
1281 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1282 | struct nfsd4_clid_slot *slot, int nfserr) | |
1283 | { | |
1284 | slot->sl_status = nfserr; | |
1285 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1286 | } | |
1287 | ||
1288 | static __be32 | |
1289 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1290 | struct nfsd4_clid_slot *slot) | |
1291 | { | |
1292 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1293 | return slot->sl_status; | |
1294 | } | |
1295 | ||
069b6ad4 AA |
1296 | __be32 |
1297 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1298 | struct nfsd4_compound_state *cstate, | |
1299 | struct nfsd4_create_session *cr_ses) | |
1300 | { | |
363168b4 | 1301 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1302 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1303 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1304 | int status = 0; |
1305 | ||
1306 | nfs4_lock_state(); | |
1307 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1308 | conf = find_confirmed_client(&cr_ses->clientid); | |
1309 | ||
1310 | if (conf) { | |
49557cc7 AA |
1311 | cs_slot = &conf->cl_cs_slot; |
1312 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1313 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1314 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1315 | cs_slot->sl_seqid); |
38eb76a5 | 1316 | /* Return the cached reply status */ |
49557cc7 | 1317 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1318 | goto out; |
49557cc7 | 1319 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1320 | status = nfserr_seq_misordered; |
1321 | dprintk("Sequence misordered!\n"); | |
1322 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1323 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1324 | goto out; |
1325 | } | |
49557cc7 | 1326 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1327 | } else if (unconf) { |
1328 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1329 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1330 | status = nfserr_clid_inuse; |
1331 | goto out; | |
1332 | } | |
1333 | ||
49557cc7 AA |
1334 | cs_slot = &unconf->cl_cs_slot; |
1335 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1336 | if (status) { |
1337 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1338 | status = nfserr_seq_misordered; |
49557cc7 | 1339 | goto out_cache; |
ec6b5d7b AA |
1340 | } |
1341 | ||
49557cc7 | 1342 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1343 | move_to_confirmed(unconf); |
1344 | ||
1345 | /* | |
1346 | * We do not support RDMA or persistent sessions | |
1347 | */ | |
1348 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1349 | cr_ses->flags &= ~SESSION4_RDMA; | |
1350 | ||
38524ab3 AA |
1351 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
1352 | unconf->cl_cb_xprt = rqstp->rq_xprt; | |
1353 | svc_xprt_get(unconf->cl_cb_xprt); | |
1354 | rpc_copy_addr( | |
1355 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1356 | sa); | |
1357 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1358 | unconf->cl_cb_conn.cb_minorversion = | |
1359 | cstate->minorversion; | |
1360 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1361 | unconf->cl_cb_seq_nr = 1; |
38524ab3 AA |
1362 | nfsd4_probe_callback(unconf); |
1363 | } | |
ec6b5d7b AA |
1364 | conf = unconf; |
1365 | } else { | |
1366 | status = nfserr_stale_clientid; | |
1367 | goto out; | |
1368 | } | |
1369 | ||
1370 | status = alloc_init_session(rqstp, conf, cr_ses); | |
1371 | if (status) | |
1372 | goto out; | |
1373 | ||
ec6b5d7b AA |
1374 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1375 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1376 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1377 | |
49557cc7 AA |
1378 | out_cache: |
1379 | /* cache solo and embedded create sessions under the state lock */ | |
1380 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1381 | out: |
1382 | nfs4_unlock_state(); | |
1383 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1384 | return status; | |
069b6ad4 AA |
1385 | } |
1386 | ||
1387 | __be32 | |
1388 | nfsd4_destroy_session(struct svc_rqst *r, | |
1389 | struct nfsd4_compound_state *cstate, | |
1390 | struct nfsd4_destroy_session *sessionid) | |
1391 | { | |
e10e0cfc BH |
1392 | struct nfsd4_session *ses; |
1393 | u32 status = nfserr_badsession; | |
1394 | ||
1395 | /* Notes: | |
1396 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1397 | * - Should we return nfserr_back_chan_busy if waiting for | |
1398 | * callbacks on to-be-destroyed session? | |
1399 | * - Do we need to clear any callback info from previous session? | |
1400 | */ | |
1401 | ||
1402 | dump_sessionid(__func__, &sessionid->sessionid); | |
1403 | spin_lock(&sessionid_lock); | |
1404 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1405 | if (!ses) { | |
1406 | spin_unlock(&sessionid_lock); | |
1407 | goto out; | |
1408 | } | |
1409 | ||
1410 | unhash_session(ses); | |
1411 | spin_unlock(&sessionid_lock); | |
1412 | ||
1413 | /* wait for callbacks */ | |
1414 | shutdown_callback_client(ses->se_client); | |
1415 | nfsd4_put_session(ses); | |
1416 | status = nfs_ok; | |
1417 | out: | |
1418 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1419 | return status; | |
069b6ad4 AA |
1420 | } |
1421 | ||
1422 | __be32 | |
b85d4c01 | 1423 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1424 | struct nfsd4_compound_state *cstate, |
1425 | struct nfsd4_sequence *seq) | |
1426 | { | |
f9bb94c4 | 1427 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1428 | struct nfsd4_session *session; |
1429 | struct nfsd4_slot *slot; | |
1430 | int status; | |
1431 | ||
f9bb94c4 AA |
1432 | if (resp->opcnt != 1) |
1433 | return nfserr_sequence_pos; | |
1434 | ||
b85d4c01 BH |
1435 | spin_lock(&sessionid_lock); |
1436 | status = nfserr_badsession; | |
1437 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1438 | if (!session) | |
1439 | goto out; | |
1440 | ||
1441 | status = nfserr_badslot; | |
6c18ba9f | 1442 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1443 | goto out; |
1444 | ||
557ce264 | 1445 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1446 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1447 | ||
a8dfdaeb AA |
1448 | /* We do not negotiate the number of slots yet, so set the |
1449 | * maxslots to the session maxreqs which is used to encode | |
1450 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1451 | seq->maxslots = session->se_fchannel.maxreqs; | |
1452 | ||
88e588d5 | 1453 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1454 | if (status == nfserr_replay_cache) { |
1455 | cstate->slot = slot; | |
1456 | cstate->session = session; | |
da3846a2 | 1457 | /* Return the cached reply status and set cstate->status |
557ce264 | 1458 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1459 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1460 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1461 | goto out; |
b85d4c01 BH |
1462 | } |
1463 | if (status) | |
1464 | goto out; | |
1465 | ||
1466 | /* Success! bump slot seqid */ | |
1467 | slot->sl_inuse = true; | |
1468 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1469 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1470 | |
1471 | cstate->slot = slot; | |
1472 | cstate->session = session; | |
1473 | ||
aaf84eb9 | 1474 | /* Hold a session reference until done processing the compound: |
b85d4c01 BH |
1475 | * nfsd4_put_session called only if the cstate slot is set. |
1476 | */ | |
b85d4c01 BH |
1477 | nfsd4_get_session(session); |
1478 | out: | |
1479 | spin_unlock(&sessionid_lock); | |
aaf84eb9 BH |
1480 | /* Renew the clientid on success and on replay */ |
1481 | if (cstate->session) { | |
1482 | nfs4_lock_state(); | |
1483 | renew_client(session->se_client); | |
1484 | nfs4_unlock_state(); | |
1485 | } | |
b85d4c01 BH |
1486 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1487 | return status; | |
069b6ad4 AA |
1488 | } |
1489 | ||
b37ad28b | 1490 | __be32 |
b591480b BF |
1491 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1492 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1493 | { |
363168b4 | 1494 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1495 | struct xdr_netobj clname = { |
1496 | .len = setclid->se_namelen, | |
1497 | .data = setclid->se_name, | |
1498 | }; | |
1499 | nfs4_verifier clverifier = setclid->se_verf; | |
1500 | unsigned int strhashval; | |
28ce6054 | 1501 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1502 | __be32 status; |
a55370a3 | 1503 | char dname[HEXDIR_LEN]; |
1da177e4 | 1504 | |
1da177e4 | 1505 | if (!check_name(clname)) |
73aea4ec | 1506 | return nfserr_inval; |
1da177e4 | 1507 | |
a55370a3 N |
1508 | status = nfs4_make_rec_clidname(dname, &clname); |
1509 | if (status) | |
73aea4ec | 1510 | return status; |
a55370a3 | 1511 | |
1da177e4 LT |
1512 | /* |
1513 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1514 | * We get here on a DRC miss. | |
1515 | */ | |
1516 | ||
a55370a3 | 1517 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1518 | |
1da177e4 | 1519 | nfs4_lock_state(); |
a1bcecd2 | 1520 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1521 | if (conf) { |
a186e767 | 1522 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1523 | status = nfserr_clid_inuse; |
026722c2 | 1524 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1525 | char addr_str[INET6_ADDRSTRLEN]; |
1526 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1527 | sizeof(addr_str)); | |
1528 | dprintk("NFSD: setclientid: string in use by client " | |
1529 | "at %s\n", addr_str); | |
1da177e4 LT |
1530 | goto out; |
1531 | } | |
1da177e4 | 1532 | } |
a186e767 BF |
1533 | /* |
1534 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1535 | * has a description of SETCLIENTID request processing consisting | |
1536 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1537 | */ | |
a1bcecd2 | 1538 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1539 | status = nfserr_resource; |
1540 | if (!conf) { | |
a186e767 BF |
1541 | /* |
1542 | * RFC 3530 14.2.33 CASE 4: | |
1543 | * placed first, because it is the normal case | |
1da177e4 LT |
1544 | */ |
1545 | if (unconf) | |
1546 | expire_client(unconf); | |
b09333c4 | 1547 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1548 | if (new == NULL) |
1da177e4 | 1549 | goto out; |
1da177e4 | 1550 | gen_clid(new); |
599e0a22 | 1551 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1552 | /* |
a186e767 BF |
1553 | * RFC 3530 14.2.33 CASE 1: |
1554 | * probable callback update | |
1da177e4 | 1555 | */ |
31f4a6c1 N |
1556 | if (unconf) { |
1557 | /* Note this is removing unconfirmed {*x***}, | |
1558 | * which is stronger than RFC recommended {vxc**}. | |
1559 | * This has the advantage that there is at most | |
1560 | * one {*x***} in either list at any time. | |
1561 | */ | |
1562 | expire_client(unconf); | |
1da177e4 | 1563 | } |
b09333c4 | 1564 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1565 | if (new == NULL) |
1da177e4 | 1566 | goto out; |
1da177e4 | 1567 | copy_clid(new, conf); |
1da177e4 LT |
1568 | } else if (!unconf) { |
1569 | /* | |
a186e767 BF |
1570 | * RFC 3530 14.2.33 CASE 2: |
1571 | * probable client reboot; state will be removed if | |
1572 | * confirmed. | |
1da177e4 | 1573 | */ |
b09333c4 | 1574 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1575 | if (new == NULL) |
1da177e4 | 1576 | goto out; |
1da177e4 | 1577 | gen_clid(new); |
49ba8781 | 1578 | } else { |
a186e767 BF |
1579 | /* |
1580 | * RFC 3530 14.2.33 CASE 3: | |
1581 | * probable client reboot; state will be removed if | |
1582 | * confirmed. | |
1da177e4 LT |
1583 | */ |
1584 | expire_client(unconf); | |
b09333c4 | 1585 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1586 | if (new == NULL) |
1da177e4 | 1587 | goto out; |
1da177e4 | 1588 | gen_clid(new); |
1da177e4 | 1589 | } |
fbf4665f | 1590 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1591 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1592 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1593 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1594 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1595 | status = nfs_ok; | |
1596 | out: | |
1597 | nfs4_unlock_state(); | |
1598 | return status; | |
1599 | } | |
1600 | ||
1601 | ||
1602 | /* | |
a186e767 BF |
1603 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1604 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1605 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1606 | */ |
b37ad28b | 1607 | __be32 |
b591480b BF |
1608 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1609 | struct nfsd4_compound_state *cstate, | |
1610 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1611 | { |
363168b4 | 1612 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1613 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1614 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1615 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1616 | __be32 status; |
1da177e4 LT |
1617 | |
1618 | if (STALE_CLIENTID(clid)) | |
1619 | return nfserr_stale_clientid; | |
1620 | /* | |
1621 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1622 | * We get here on a DRC miss. | |
1623 | */ | |
1624 | ||
1625 | nfs4_lock_state(); | |
21ab45a4 N |
1626 | |
1627 | conf = find_confirmed_client(clid); | |
1628 | unconf = find_unconfirmed_client(clid); | |
1629 | ||
1630 | status = nfserr_clid_inuse; | |
363168b4 | 1631 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1632 | goto out; |
363168b4 | 1633 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1634 | goto out; |
1635 | ||
a186e767 BF |
1636 | /* |
1637 | * section 14.2.34 of RFC 3530 has a description of | |
1638 | * SETCLIENTID_CONFIRM request processing consisting | |
1639 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1640 | */ | |
366e0c1d | 1641 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1642 | /* |
1643 | * RFC 3530 14.2.34 CASE 1: | |
1644 | * callback update | |
1645 | */ | |
599e0a22 | 1646 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1647 | status = nfserr_clid_inuse; |
1648 | else { | |
1a69c179 N |
1649 | /* XXX: We just turn off callbacks until we can handle |
1650 | * change request correctly. */ | |
c237dc03 | 1651 | atomic_set(&conf->cl_cb_conn.cb_set, 0); |
1a69c179 | 1652 | expire_client(unconf); |
1da177e4 | 1653 | status = nfs_ok; |
1a69c179 | 1654 | |
1da177e4 | 1655 | } |
f3aba4e5 | 1656 | } else if (conf && !unconf) { |
a186e767 BF |
1657 | /* |
1658 | * RFC 3530 14.2.34 CASE 2: | |
1659 | * probable retransmitted request; play it safe and | |
1660 | * do nothing. | |
7c79f737 | 1661 | */ |
599e0a22 | 1662 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1663 | status = nfserr_clid_inuse; |
21ab45a4 | 1664 | else |
1da177e4 | 1665 | status = nfs_ok; |
7c79f737 | 1666 | } else if (!conf && unconf |
599e0a22 | 1667 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1668 | /* |
1669 | * RFC 3530 14.2.34 CASE 3: | |
1670 | * Normal case; new or rebooted client: | |
7c79f737 | 1671 | */ |
599e0a22 | 1672 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1673 | status = nfserr_clid_inuse; |
1674 | } else { | |
1a69c179 N |
1675 | unsigned int hash = |
1676 | clientstr_hashval(unconf->cl_recdir); | |
1677 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1678 | hash, false); |
1a69c179 | 1679 | if (conf) { |
c7b9a459 | 1680 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1681 | expire_client(conf); |
1682 | } | |
1da177e4 | 1683 | move_to_confirmed(unconf); |
21ab45a4 | 1684 | conf = unconf; |
46f8a64b | 1685 | nfsd4_probe_callback(conf); |
1a69c179 | 1686 | status = nfs_ok; |
1da177e4 | 1687 | } |
599e0a22 BF |
1688 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1689 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1690 | &confirm)))) { |
a186e767 BF |
1691 | /* |
1692 | * RFC 3530 14.2.34 CASE 4: | |
1693 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1694 | */ |
1da177e4 | 1695 | status = nfserr_stale_clientid; |
7c79f737 | 1696 | } else { |
08e8987c N |
1697 | /* check that we have hit one of the cases...*/ |
1698 | status = nfserr_clid_inuse; | |
1699 | } | |
1da177e4 | 1700 | out: |
1da177e4 LT |
1701 | nfs4_unlock_state(); |
1702 | return status; | |
1703 | } | |
1704 | ||
1da177e4 LT |
1705 | /* OPEN Share state helper functions */ |
1706 | static inline struct nfs4_file * | |
1707 | alloc_init_file(struct inode *ino) | |
1708 | { | |
1709 | struct nfs4_file *fp; | |
1710 | unsigned int hashval = file_hashval(ino); | |
1711 | ||
e60d4398 N |
1712 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1713 | if (fp) { | |
8b671b80 | 1714 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1715 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1716 | INIT_LIST_HEAD(&fp->fi_stateids); |
1717 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1718 | spin_lock(&recall_lock); |
1da177e4 | 1719 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1720 | spin_unlock(&recall_lock); |
1da177e4 LT |
1721 | fp->fi_inode = igrab(ino); |
1722 | fp->fi_id = current_fileid++; | |
47f9940c | 1723 | fp->fi_had_conflict = false; |
1da177e4 LT |
1724 | return fp; |
1725 | } | |
1726 | return NULL; | |
1727 | } | |
1728 | ||
e60d4398 | 1729 | static void |
e18b890b | 1730 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1731 | { |
e60d4398 N |
1732 | if (*slab == NULL) |
1733 | return; | |
1a1d92c1 | 1734 | kmem_cache_destroy(*slab); |
e60d4398 | 1735 | *slab = NULL; |
1da177e4 LT |
1736 | } |
1737 | ||
e8ff2a84 | 1738 | void |
1da177e4 LT |
1739 | nfsd4_free_slabs(void) |
1740 | { | |
e60d4398 N |
1741 | nfsd4_free_slab(&stateowner_slab); |
1742 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1743 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1744 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1745 | } |
1da177e4 | 1746 | |
e60d4398 N |
1747 | static int |
1748 | nfsd4_init_slabs(void) | |
1749 | { | |
1750 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1751 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1752 | if (stateowner_slab == NULL) |
1753 | goto out_nomem; | |
1754 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1755 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1756 | if (file_slab == NULL) |
1757 | goto out_nomem; | |
5ac049ac | 1758 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1759 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1760 | if (stateid_slab == NULL) |
1761 | goto out_nomem; | |
5b2d21c1 | 1762 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1763 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1764 | if (deleg_slab == NULL) |
1765 | goto out_nomem; | |
e60d4398 N |
1766 | return 0; |
1767 | out_nomem: | |
1768 | nfsd4_free_slabs(); | |
1769 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1770 | return -ENOMEM; | |
1da177e4 LT |
1771 | } |
1772 | ||
1773 | void | |
1774 | nfs4_free_stateowner(struct kref *kref) | |
1775 | { | |
1776 | struct nfs4_stateowner *sop = | |
1777 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1778 | kfree(sop->so_owner.data); | |
1779 | kmem_cache_free(stateowner_slab, sop); | |
1780 | } | |
1781 | ||
1782 | static inline struct nfs4_stateowner * | |
1783 | alloc_stateowner(struct xdr_netobj *owner) | |
1784 | { | |
1785 | struct nfs4_stateowner *sop; | |
1786 | ||
1787 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1788 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1789 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1790 | sop->so_owner.len = owner->len; | |
1791 | kref_init(&sop->so_ref); | |
1792 | return sop; | |
1793 | } | |
1794 | kmem_cache_free(stateowner_slab, sop); | |
1795 | } | |
1796 | return NULL; | |
1797 | } | |
1798 | ||
1799 | static struct nfs4_stateowner * | |
1800 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1801 | struct nfs4_stateowner *sop; | |
1802 | struct nfs4_replay *rp; | |
1803 | unsigned int idhashval; | |
1804 | ||
1805 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1806 | return NULL; | |
1807 | idhashval = ownerid_hashval(current_ownerid); | |
1808 | INIT_LIST_HEAD(&sop->so_idhash); | |
1809 | INIT_LIST_HEAD(&sop->so_strhash); | |
1810 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1811 | INIT_LIST_HEAD(&sop->so_stateids); |
1812 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1813 | INIT_LIST_HEAD(&sop->so_close_lru); |
1814 | sop->so_time = 0; | |
1815 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1816 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1817 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1818 | sop->so_is_open_owner = 1; |
1819 | sop->so_id = current_ownerid++; | |
1820 | sop->so_client = clp; | |
1821 | sop->so_seqid = open->op_seqid; | |
1822 | sop->so_confirmed = 0; | |
1823 | rp = &sop->so_replay; | |
de1ae286 | 1824 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1825 | rp->rp_buflen = 0; |
1826 | rp->rp_buf = rp->rp_ibuf; | |
1827 | return sop; | |
1828 | } | |
1829 | ||
1da177e4 LT |
1830 | static inline void |
1831 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1832 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1833 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1834 | ||
1835 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1836 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1837 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1838 | INIT_LIST_HEAD(&stp->st_perfile); |
1839 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1840 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1841 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1842 | stp->st_stateowner = sop; |
13cd2184 | 1843 | get_nfs4_file(fp); |
1da177e4 | 1844 | stp->st_file = fp; |
78155ed7 | 1845 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
1846 | stp->st_stateid.si_stateownerid = sop->so_id; |
1847 | stp->st_stateid.si_fileid = fp->fi_id; | |
1848 | stp->st_stateid.si_generation = 0; | |
1849 | stp->st_access_bmap = 0; | |
1850 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1851 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1852 | &stp->st_access_bmap); | |
1da177e4 | 1853 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1854 | stp->st_openstp = NULL; |
1da177e4 LT |
1855 | } |
1856 | ||
fd39ca9a | 1857 | static void |
1da177e4 LT |
1858 | move_to_close_lru(struct nfs4_stateowner *sop) |
1859 | { | |
1860 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1861 | ||
358dd55a | 1862 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1863 | sop->so_time = get_seconds(); |
1864 | } | |
1865 | ||
1da177e4 | 1866 | static int |
599e0a22 BF |
1867 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1868 | clientid_t *clid) | |
1869 | { | |
1870 | return (sop->so_owner.len == owner->len) && | |
1871 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1872 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | static struct nfs4_stateowner * | |
1876 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1877 | { | |
1878 | struct nfs4_stateowner *so = NULL; | |
1879 | ||
1880 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1881 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1882 | return so; |
1883 | } | |
1884 | return NULL; | |
1885 | } | |
1886 | ||
1887 | /* search file_hashtbl[] for file */ | |
1888 | static struct nfs4_file * | |
1889 | find_file(struct inode *ino) | |
1890 | { | |
1891 | unsigned int hashval = file_hashval(ino); | |
1892 | struct nfs4_file *fp; | |
1893 | ||
8b671b80 | 1894 | spin_lock(&recall_lock); |
1da177e4 | 1895 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1896 | if (fp->fi_inode == ino) { |
1897 | get_nfs4_file(fp); | |
8b671b80 | 1898 | spin_unlock(&recall_lock); |
1da177e4 | 1899 | return fp; |
13cd2184 | 1900 | } |
1da177e4 | 1901 | } |
8b671b80 | 1902 | spin_unlock(&recall_lock); |
1da177e4 LT |
1903 | return NULL; |
1904 | } | |
1905 | ||
d87a8ade | 1906 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1907 | { |
d87a8ade | 1908 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1909 | return 0; |
d87a8ade AA |
1910 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1911 | return 0; | |
1912 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1913 | if (minorversion && x) { | |
1914 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1915 | return 0; | |
1916 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1917 | return 0; | |
1918 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1919 | } | |
1920 | if (x) | |
8838dc43 BF |
1921 | return 0; |
1922 | return 1; | |
ba5a6a19 BF |
1923 | } |
1924 | ||
8838dc43 | 1925 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1926 | { |
8838dc43 BF |
1927 | /* Note: unlike access bits, deny bits may be zero. */ |
1928 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1929 | } |
1da177e4 | 1930 | |
4f83aa30 BF |
1931 | /* |
1932 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1933 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1934 | * only what share bits are currently in force, but also what | |
1935 | * combinations of share bits previous opens have used. This allows us | |
1936 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1937 | * return an error if the client attempt to downgrade to a combination | |
1938 | * of share bits not explicable by closing some of its previous opens. | |
1939 | * | |
1940 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1941 | * track of access/deny bit combinations; so, e.g., we allow: | |
1942 | * | |
1943 | * OPEN allow read, deny write | |
1944 | * OPEN allow both, deny none | |
1945 | * DOWNGRADE allow read, deny none | |
1946 | * | |
1947 | * which we should reject. | |
1948 | */ | |
fd39ca9a | 1949 | static void |
1da177e4 LT |
1950 | set_access(unsigned int *access, unsigned long bmap) { |
1951 | int i; | |
1952 | ||
1953 | *access = 0; | |
1954 | for (i = 1; i < 4; i++) { | |
1955 | if (test_bit(i, &bmap)) | |
1956 | *access |= i; | |
1957 | } | |
1958 | } | |
1959 | ||
fd39ca9a | 1960 | static void |
1da177e4 LT |
1961 | set_deny(unsigned int *deny, unsigned long bmap) { |
1962 | int i; | |
1963 | ||
1964 | *deny = 0; | |
1965 | for (i = 0; i < 4; i++) { | |
1966 | if (test_bit(i, &bmap)) | |
1967 | *deny |= i ; | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | static int | |
1972 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1973 | unsigned int access, deny; | |
1974 | ||
1975 | set_access(&access, stp->st_access_bmap); | |
1976 | set_deny(&deny, stp->st_deny_bmap); | |
1977 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1978 | return 0; | |
1979 | return 1; | |
1980 | } | |
1981 | ||
1982 | /* | |
1983 | * Called to check deny when READ with all zero stateid or | |
1984 | * WRITE with all zero or all one stateid | |
1985 | */ | |
b37ad28b | 1986 | static __be32 |
1da177e4 LT |
1987 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1988 | { | |
1989 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1990 | struct nfs4_file *fp; | |
1991 | struct nfs4_stateid *stp; | |
b37ad28b | 1992 | __be32 ret; |
1da177e4 LT |
1993 | |
1994 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1995 | ||
1996 | fp = find_file(ino); | |
13cd2184 N |
1997 | if (!fp) |
1998 | return nfs_ok; | |
b700949b | 1999 | ret = nfserr_locked; |
1da177e4 | 2000 | /* Search for conflicting share reservations */ |
13cd2184 N |
2001 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2002 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2003 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2004 | goto out; | |
1da177e4 | 2005 | } |
13cd2184 N |
2006 | ret = nfs_ok; |
2007 | out: | |
2008 | put_nfs4_file(fp); | |
2009 | return ret; | |
1da177e4 LT |
2010 | } |
2011 | ||
2012 | static inline void | |
2013 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2014 | { | |
2015 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2016 | drop_file_write_access(filp); |
1da177e4 LT |
2017 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
2018 | } | |
2019 | } | |
2020 | ||
1da177e4 LT |
2021 | /* |
2022 | * Spawn a thread to perform a recall on the delegation represented | |
2023 | * by the lease (file_lock) | |
2024 | * | |
2025 | * Called from break_lease() with lock_kernel() held. | |
2026 | * Note: we assume break_lease will only call this *once* for any given | |
2027 | * lease. | |
2028 | */ | |
2029 | static | |
2030 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2031 | { | |
63e4863f | 2032 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2033 | |
2034 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2035 | if (!dp) | |
2036 | return; | |
2037 | ||
2038 | /* We're assuming the state code never drops its reference | |
2039 | * without first removing the lease. Since we're in this lease | |
2040 | * callback (and since the lease code is serialized by the kernel | |
2041 | * lock) we know the server hasn't removed the lease yet, we know | |
2042 | * it's safe to take a reference: */ | |
2043 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 2044 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
2045 | |
2046 | spin_lock(&recall_lock); | |
2047 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2048 | spin_unlock(&recall_lock); | |
2049 | ||
2050 | /* only place dl_time is set. protected by lock_kernel*/ | |
2051 | dp->dl_time = get_seconds(); | |
2052 | ||
0272e1fd BF |
2053 | /* |
2054 | * We don't want the locks code to timeout the lease for us; | |
2055 | * we'll remove it ourself if the delegation isn't returned | |
2056 | * in time. | |
2057 | */ | |
2058 | fl->fl_break_time = 0; | |
1da177e4 | 2059 | |
63e4863f BF |
2060 | dp->dl_file->fi_had_conflict = true; |
2061 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2062 | } |
2063 | ||
2064 | /* | |
2065 | * The file_lock is being reapd. | |
2066 | * | |
2067 | * Called by locks_free_lock() with lock_kernel() held. | |
2068 | */ | |
2069 | static | |
2070 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2071 | { | |
2072 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2073 | ||
2074 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2075 | ||
2076 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2077 | return; | |
2078 | dp->dl_flock = NULL; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * Set the delegation file_lock back pointer. | |
2083 | * | |
a9933cea | 2084 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2085 | */ |
2086 | static | |
2087 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2088 | { | |
2089 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2090 | ||
2091 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2092 | if (!dp) | |
2093 | return; | |
2094 | dp->dl_flock = new; | |
2095 | } | |
2096 | ||
2097 | /* | |
a9933cea | 2098 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2099 | */ |
2100 | static | |
2101 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2102 | { | |
2103 | struct nfs4_delegation *onlistd = | |
2104 | (struct nfs4_delegation *)onlist->fl_owner; | |
2105 | struct nfs4_delegation *tryd = | |
2106 | (struct nfs4_delegation *)try->fl_owner; | |
2107 | ||
2108 | if (onlist->fl_lmops != try->fl_lmops) | |
2109 | return 0; | |
2110 | ||
2111 | return onlistd->dl_client == tryd->dl_client; | |
2112 | } | |
2113 | ||
2114 | ||
2115 | static | |
2116 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2117 | { | |
2118 | if (arg & F_UNLCK) | |
2119 | return lease_modify(onlist, arg); | |
2120 | else | |
2121 | return -EAGAIN; | |
2122 | } | |
2123 | ||
7b021967 | 2124 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2125 | .fl_break = nfsd_break_deleg_cb, |
2126 | .fl_release_private = nfsd_release_deleg_cb, | |
2127 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2128 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2129 | .fl_change = nfsd_change_deleg_cb, | |
2130 | }; | |
2131 | ||
2132 | ||
b37ad28b | 2133 | __be32 |
6668958f AA |
2134 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2135 | struct nfsd4_open *open) | |
1da177e4 | 2136 | { |
1da177e4 LT |
2137 | clientid_t *clientid = &open->op_clientid; |
2138 | struct nfs4_client *clp = NULL; | |
2139 | unsigned int strhashval; | |
2140 | struct nfs4_stateowner *sop = NULL; | |
2141 | ||
1da177e4 | 2142 | if (!check_name(open->op_owner)) |
0f442aa2 | 2143 | return nfserr_inval; |
1da177e4 LT |
2144 | |
2145 | if (STALE_CLIENTID(&open->op_clientid)) | |
2146 | return nfserr_stale_clientid; | |
2147 | ||
2148 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2149 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2150 | open->op_stateowner = sop; |
2151 | if (!sop) { | |
2152 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2153 | clp = find_confirmed_client(clientid); |
2154 | if (clp == NULL) | |
0f442aa2 BF |
2155 | return nfserr_expired; |
2156 | goto renew; | |
1da177e4 | 2157 | } |
6668958f AA |
2158 | /* When sessions are used, skip open sequenceid processing */ |
2159 | if (nfsd4_has_session(cstate)) | |
2160 | goto renew; | |
0f442aa2 BF |
2161 | if (!sop->so_confirmed) { |
2162 | /* Replace unconfirmed owners without checking for replay. */ | |
2163 | clp = sop->so_client; | |
f044ff83 | 2164 | release_openowner(sop); |
0f442aa2 BF |
2165 | open->op_stateowner = NULL; |
2166 | goto renew; | |
2167 | } | |
2168 | if (open->op_seqid == sop->so_seqid - 1) { | |
2169 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2170 | return nfserr_replay_me; |
0f442aa2 BF |
2171 | /* The original OPEN failed so spectacularly |
2172 | * that we don't even have replay data saved! | |
2173 | * Therefore, we have no choice but to continue | |
2174 | * processing this OPEN; presumably, we'll | |
2175 | * fail again for the same reason. | |
2176 | */ | |
2177 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2178 | goto renew; | |
2179 | } | |
2180 | if (open->op_seqid != sop->so_seqid) | |
2181 | return nfserr_bad_seqid; | |
1da177e4 | 2182 | renew: |
0f442aa2 BF |
2183 | if (open->op_stateowner == NULL) { |
2184 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2185 | if (sop == NULL) | |
2186 | return nfserr_resource; | |
2187 | open->op_stateowner = sop; | |
2188 | } | |
2189 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2190 | renew_client(sop->so_client); |
0f442aa2 | 2191 | return nfs_ok; |
1da177e4 LT |
2192 | } |
2193 | ||
b37ad28b | 2194 | static inline __be32 |
4a6e43e6 N |
2195 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2196 | { | |
2197 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2198 | return nfserr_openmode; | |
2199 | else | |
2200 | return nfs_ok; | |
2201 | } | |
2202 | ||
52f4fb43 N |
2203 | static struct nfs4_delegation * |
2204 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2205 | { | |
2206 | struct nfs4_delegation *dp; | |
2207 | ||
ea1da636 | 2208 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2209 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2210 | return dp; | |
2211 | } | |
2212 | return NULL; | |
2213 | } | |
2214 | ||
b37ad28b | 2215 | static __be32 |
567d9829 N |
2216 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2217 | struct nfs4_delegation **dp) | |
2218 | { | |
2219 | int flags; | |
b37ad28b | 2220 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2221 | |
2222 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2223 | if (*dp == NULL) | |
c44c5eeb | 2224 | goto out; |
567d9829 N |
2225 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2226 | RD_STATE : WR_STATE; | |
2227 | status = nfs4_check_delegmode(*dp, flags); | |
2228 | if (status) | |
2229 | *dp = NULL; | |
c44c5eeb N |
2230 | out: |
2231 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2232 | return nfs_ok; | |
2233 | if (status) | |
2234 | return status; | |
2235 | open->op_stateowner->so_confirmed = 1; | |
2236 | return nfs_ok; | |
567d9829 N |
2237 | } |
2238 | ||
b37ad28b | 2239 | static __be32 |
1da177e4 LT |
2240 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2241 | { | |
2242 | struct nfs4_stateid *local; | |
b37ad28b | 2243 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2244 | struct nfs4_stateowner *sop = open->op_stateowner; |
2245 | ||
8beefa24 | 2246 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2247 | /* ignore lock owners */ |
2248 | if (local->st_stateowner->so_is_open_owner == 0) | |
2249 | continue; | |
2250 | /* remember if we have seen this open owner */ | |
2251 | if (local->st_stateowner == sop) | |
2252 | *stpp = local; | |
2253 | /* check for conflicting share reservations */ | |
2254 | if (!test_share(local, open)) | |
2255 | goto out; | |
2256 | } | |
2257 | status = 0; | |
2258 | out: | |
2259 | return status; | |
2260 | } | |
2261 | ||
5ac049ac N |
2262 | static inline struct nfs4_stateid * |
2263 | nfs4_alloc_stateid(void) | |
2264 | { | |
2265 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2266 | } | |
2267 | ||
b37ad28b | 2268 | static __be32 |
1da177e4 | 2269 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2270 | struct nfs4_delegation *dp, |
1da177e4 LT |
2271 | struct svc_fh *cur_fh, int flags) |
2272 | { | |
2273 | struct nfs4_stateid *stp; | |
1da177e4 | 2274 | |
5ac049ac | 2275 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2276 | if (stp == NULL) |
2277 | return nfserr_resource; | |
2278 | ||
567d9829 N |
2279 | if (dp) { |
2280 | get_file(dp->dl_vfs_file); | |
2281 | stp->st_vfs_file = dp->dl_vfs_file; | |
2282 | } else { | |
b37ad28b | 2283 | __be32 status; |
567d9829 N |
2284 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2285 | &stp->st_vfs_file); | |
2286 | if (status) { | |
2287 | if (status == nfserr_dropit) | |
2288 | status = nfserr_jukebox; | |
5ac049ac | 2289 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2290 | return status; |
2291 | } | |
1da177e4 | 2292 | } |
1da177e4 LT |
2293 | *stpp = stp; |
2294 | return 0; | |
2295 | } | |
2296 | ||
b37ad28b | 2297 | static inline __be32 |
1da177e4 LT |
2298 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2299 | struct nfsd4_open *open) | |
2300 | { | |
2301 | struct iattr iattr = { | |
2302 | .ia_valid = ATTR_SIZE, | |
2303 | .ia_size = 0, | |
2304 | }; | |
2305 | if (!open->op_truncate) | |
2306 | return 0; | |
2307 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2308 | return nfserr_inval; |
1da177e4 LT |
2309 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2310 | } | |
2311 | ||
b37ad28b | 2312 | static __be32 |
1da177e4 LT |
2313 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2314 | { | |
2315 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2316 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2317 | unsigned int share_access, new_writer; |
b37ad28b | 2318 | __be32 status; |
1da177e4 LT |
2319 | |
2320 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2321 | new_writer = (~share_access) & open->op_share_access |
2322 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2323 | |
6c26d08f | 2324 | if (new_writer) { |
b37ad28b AV |
2325 | int err = get_write_access(inode); |
2326 | if (err) | |
2327 | return nfserrno(err); | |
e518f056 BH |
2328 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2329 | if (err) | |
2330 | return nfserrno(err); | |
2331 | file_take_write(filp); | |
6c26d08f | 2332 | } |
1da177e4 LT |
2333 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2334 | if (status) { | |
6c26d08f BF |
2335 | if (new_writer) |
2336 | put_write_access(inode); | |
1da177e4 LT |
2337 | return status; |
2338 | } | |
2339 | /* remember the open */ | |
6c26d08f | 2340 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2341 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2342 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2343 | |
2344 | return nfs_ok; | |
2345 | } | |
2346 | ||
2347 | ||
1da177e4 | 2348 | static void |
37515177 | 2349 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2350 | { |
37515177 N |
2351 | open->op_stateowner->so_confirmed = 1; |
2352 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2353 | } |
2354 | ||
2355 | /* | |
2356 | * Attempt to hand out a delegation. | |
2357 | */ | |
2358 | static void | |
2359 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2360 | { | |
2361 | struct nfs4_delegation *dp; | |
2362 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
c237dc03 | 2363 | struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; |
1da177e4 LT |
2364 | struct file_lock fl, *flp = &fl; |
2365 | int status, flag = 0; | |
2366 | ||
2367 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2368 | open->op_recall = 0; |
2369 | switch (open->op_claim_type) { | |
2370 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2371 | if (!atomic_read(&cb->cb_set)) | |
2372 | open->op_recall = 1; | |
2373 | flag = open->op_delegate_type; | |
2374 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2375 | goto out; | |
2376 | break; | |
2377 | case NFS4_OPEN_CLAIM_NULL: | |
2378 | /* Let's not give out any delegations till everyone's | |
2379 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2380 | if (locks_in_grace()) |
7b190fec N |
2381 | goto out; |
2382 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
2383 | goto out; | |
2384 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2385 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2386 | else | |
2387 | flag = NFS4_OPEN_DELEGATE_READ; | |
2388 | break; | |
2389 | default: | |
2390 | goto out; | |
2391 | } | |
1da177e4 LT |
2392 | |
2393 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2394 | if (dp == NULL) { | |
2395 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2396 | goto out; | |
2397 | } | |
2398 | locks_init_lock(&fl); | |
2399 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2400 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2401 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2402 | fl.fl_end = OFFSET_MAX; |
2403 | fl.fl_owner = (fl_owner_t)dp; | |
2404 | fl.fl_file = stp->st_vfs_file; | |
2405 | fl.fl_pid = current->tgid; | |
2406 | ||
a9933cea | 2407 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2408 | * the lock_manager callbacks fl_mylease and fl_change are used |
2409 | */ | |
9167f501 | 2410 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2411 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2412 | unhash_delegation(dp); |
1da177e4 LT |
2413 | flag = NFS4_OPEN_DELEGATE_NONE; |
2414 | goto out; | |
2415 | } | |
2416 | ||
2417 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2418 | ||
8c10cbdb BH |
2419 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2420 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2421 | out: |
7b190fec N |
2422 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2423 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2424 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2425 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2426 | open->op_delegate_type = flag; |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * called with nfs4_lock_state() held. | |
2431 | */ | |
b37ad28b | 2432 | __be32 |
1da177e4 LT |
2433 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2434 | { | |
6668958f | 2435 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2436 | struct nfs4_file *fp = NULL; |
2437 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2438 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2439 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2440 | __be32 status; |
1da177e4 LT |
2441 | |
2442 | status = nfserr_inval; | |
d87a8ade | 2443 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2444 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2445 | goto out; |
2446 | /* | |
2447 | * Lookup file; if found, lookup stateid and check open request, | |
2448 | * and check for delegations in the process of being recalled. | |
2449 | * If not found, create the nfs4_file struct | |
2450 | */ | |
2451 | fp = find_file(ino); | |
2452 | if (fp) { | |
2453 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2454 | goto out; | |
c44c5eeb N |
2455 | status = nfs4_check_deleg(fp, open, &dp); |
2456 | if (status) | |
2457 | goto out; | |
1da177e4 | 2458 | } else { |
c44c5eeb N |
2459 | status = nfserr_bad_stateid; |
2460 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2461 | goto out; | |
1da177e4 LT |
2462 | status = nfserr_resource; |
2463 | fp = alloc_init_file(ino); | |
2464 | if (fp == NULL) | |
2465 | goto out; | |
2466 | } | |
2467 | ||
2468 | /* | |
2469 | * OPEN the file, or upgrade an existing OPEN. | |
2470 | * If truncate fails, the OPEN fails. | |
2471 | */ | |
2472 | if (stp) { | |
2473 | /* Stateid was found, this is an OPEN upgrade */ | |
2474 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2475 | if (status) | |
2476 | goto out; | |
444c2c07 | 2477 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2478 | } else { |
2479 | /* Stateid was not found, this is a new OPEN */ | |
2480 | int flags = 0; | |
9ecb6a08 | 2481 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2482 | flags |= NFSD_MAY_READ; |
1da177e4 | 2483 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2484 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2485 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2486 | if (status) | |
1da177e4 LT |
2487 | goto out; |
2488 | init_stateid(stp, fp, open); | |
2489 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2490 | if (status) { | |
2283963f | 2491 | release_open_stateid(stp); |
1da177e4 LT |
2492 | goto out; |
2493 | } | |
6668958f AA |
2494 | if (nfsd4_has_session(&resp->cstate)) |
2495 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2496 | } |
2497 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2498 | ||
6668958f AA |
2499 | if (nfsd4_has_session(&resp->cstate)) |
2500 | open->op_stateowner->so_confirmed = 1; | |
2501 | ||
1da177e4 LT |
2502 | /* |
2503 | * Attempt to hand out a delegation. No error return, because the | |
2504 | * OPEN succeeds even if we fail. | |
2505 | */ | |
2506 | nfs4_open_delegation(current_fh, open, stp); | |
2507 | ||
2508 | status = nfs_ok; | |
2509 | ||
8c10cbdb BH |
2510 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2511 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2512 | out: |
13cd2184 N |
2513 | if (fp) |
2514 | put_nfs4_file(fp); | |
37515177 N |
2515 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2516 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2517 | /* |
2518 | * To finish the open response, we just need to set the rflags. | |
2519 | */ | |
2520 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2521 | if (!open->op_stateowner->so_confirmed && |
2522 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2523 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2524 | ||
2525 | return status; | |
2526 | } | |
2527 | ||
b37ad28b | 2528 | __be32 |
b591480b BF |
2529 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2530 | clientid_t *clid) | |
1da177e4 LT |
2531 | { |
2532 | struct nfs4_client *clp; | |
b37ad28b | 2533 | __be32 status; |
1da177e4 LT |
2534 | |
2535 | nfs4_lock_state(); | |
2536 | dprintk("process_renew(%08x/%08x): starting\n", | |
2537 | clid->cl_boot, clid->cl_id); | |
2538 | status = nfserr_stale_clientid; | |
2539 | if (STALE_CLIENTID(clid)) | |
2540 | goto out; | |
2541 | clp = find_confirmed_client(clid); | |
2542 | status = nfserr_expired; | |
2543 | if (clp == NULL) { | |
2544 | /* We assume the client took too long to RENEW. */ | |
2545 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2546 | goto out; | |
2547 | } | |
2548 | renew_client(clp); | |
2549 | status = nfserr_cb_path_down; | |
ea1da636 | 2550 | if (!list_empty(&clp->cl_delegations) |
c237dc03 | 2551 | && !atomic_read(&clp->cl_cb_conn.cb_set)) |
1da177e4 LT |
2552 | goto out; |
2553 | status = nfs_ok; | |
2554 | out: | |
2555 | nfs4_unlock_state(); | |
2556 | return status; | |
2557 | } | |
2558 | ||
af558e33 BF |
2559 | struct lock_manager nfsd4_manager = { |
2560 | }; | |
2561 | ||
a76b4319 | 2562 | static void |
af558e33 | 2563 | nfsd4_end_grace(void) |
a76b4319 N |
2564 | { |
2565 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2566 | nfsd4_recdir_purge_old(); |
af558e33 | 2567 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
2568 | } |
2569 | ||
fd39ca9a | 2570 | static time_t |
1da177e4 LT |
2571 | nfs4_laundromat(void) |
2572 | { | |
2573 | struct nfs4_client *clp; | |
2574 | struct nfs4_stateowner *sop; | |
2575 | struct nfs4_delegation *dp; | |
2576 | struct list_head *pos, *next, reaplist; | |
2577 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
2578 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
2579 | time_t u, test_val = NFSD_LEASE_TIME; | |
2580 | ||
2581 | nfs4_lock_state(); | |
2582 | ||
2583 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2584 | if (locks_in_grace()) |
2585 | nfsd4_end_grace(); | |
1da177e4 LT |
2586 | list_for_each_safe(pos, next, &client_lru) { |
2587 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2588 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2589 | t = clp->cl_time - cutoff; | |
2590 | if (clientid_val > t) | |
2591 | clientid_val = t; | |
2592 | break; | |
2593 | } | |
2594 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2595 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2596 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2597 | expire_client(clp); |
2598 | } | |
2599 | INIT_LIST_HEAD(&reaplist); | |
2600 | spin_lock(&recall_lock); | |
2601 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2602 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2603 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2604 | u = dp->dl_time - cutoff; | |
2605 | if (test_val > u) | |
2606 | test_val = u; | |
2607 | break; | |
2608 | } | |
2609 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2610 | dp, dp->dl_flock); | |
2611 | list_move(&dp->dl_recall_lru, &reaplist); | |
2612 | } | |
2613 | spin_unlock(&recall_lock); | |
2614 | list_for_each_safe(pos, next, &reaplist) { | |
2615 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2616 | list_del_init(&dp->dl_recall_lru); | |
2617 | unhash_delegation(dp); | |
2618 | } | |
2619 | test_val = NFSD_LEASE_TIME; | |
2620 | list_for_each_safe(pos, next, &close_lru) { | |
2621 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2622 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2623 | u = sop->so_time - cutoff; | |
2624 | if (test_val > u) | |
2625 | test_val = u; | |
2626 | break; | |
2627 | } | |
2628 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2629 | sop->so_id); | |
f044ff83 | 2630 | release_openowner(sop); |
1da177e4 LT |
2631 | } |
2632 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2633 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2634 | nfs4_unlock_state(); | |
2635 | return clientid_val; | |
2636 | } | |
2637 | ||
a254b246 HH |
2638 | static struct workqueue_struct *laundry_wq; |
2639 | static void laundromat_main(struct work_struct *); | |
2640 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2641 | ||
2642 | static void | |
c4028958 | 2643 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2644 | { |
2645 | time_t t; | |
2646 | ||
2647 | t = nfs4_laundromat(); | |
2648 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2649 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2650 | } |
2651 | ||
fd39ca9a | 2652 | static struct nfs4_stateowner * |
f8816512 N |
2653 | search_close_lru(u32 st_id, int flags) |
2654 | { | |
1da177e4 LT |
2655 | struct nfs4_stateowner *local = NULL; |
2656 | ||
1da177e4 LT |
2657 | if (flags & CLOSE_STATE) { |
2658 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2659 | if (local->so_id == st_id) | |
2660 | return local; | |
2661 | } | |
2662 | } | |
2663 | return NULL; | |
2664 | } | |
2665 | ||
2666 | static inline int | |
2667 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2668 | { | |
7eaa36e2 | 2669 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2670 | } |
2671 | ||
2672 | static int | |
2673 | STALE_STATEID(stateid_t *stateid) | |
2674 | { | |
78155ed7 BN |
2675 | if (time_after((unsigned long)boot_time, |
2676 | (unsigned long)stateid->si_boot)) { | |
8c10cbdb BH |
2677 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
2678 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2679 | return 1; |
2680 | } | |
2681 | return 0; | |
2682 | } | |
2683 | ||
2684 | static int | |
2685 | EXPIRED_STATEID(stateid_t *stateid) | |
2686 | { | |
2687 | if (time_before((unsigned long)boot_time, | |
2688 | ((unsigned long)stateid->si_boot)) && | |
b8fd47ae | 2689 | time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { |
8c10cbdb BH |
2690 | dprintk("NFSD: expired stateid " STATEID_FMT "!\n", |
2691 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2692 | return 1; |
2693 | } | |
2694 | return 0; | |
2695 | } | |
2696 | ||
2697 | static __be32 | |
2698 | stateid_error_map(stateid_t *stateid) | |
2699 | { | |
2700 | if (STALE_STATEID(stateid)) | |
2701 | return nfserr_stale_stateid; | |
2702 | if (EXPIRED_STATEID(stateid)) | |
2703 | return nfserr_expired; | |
2704 | ||
8c10cbdb BH |
2705 | dprintk("NFSD: bad stateid " STATEID_FMT "!\n", |
2706 | STATEID_VAL(stateid)); | |
78155ed7 | 2707 | return nfserr_bad_stateid; |
1da177e4 LT |
2708 | } |
2709 | ||
2710 | static inline int | |
2711 | access_permit_read(unsigned long access_bmap) | |
2712 | { | |
2713 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2714 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2715 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2716 | } | |
2717 | ||
2718 | static inline int | |
2719 | access_permit_write(unsigned long access_bmap) | |
2720 | { | |
2721 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2722 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2723 | } | |
2724 | ||
2725 | static | |
b37ad28b | 2726 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2727 | { |
b37ad28b | 2728 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2729 | |
2730 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2731 | goto out; | |
2732 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2733 | goto out; | |
2734 | status = nfs_ok; | |
2735 | out: | |
2736 | return status; | |
2737 | } | |
2738 | ||
b37ad28b | 2739 | static inline __be32 |
1da177e4 LT |
2740 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2741 | { | |
203a8c8e | 2742 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2743 | return nfs_ok; |
af558e33 | 2744 | else if (locks_in_grace()) { |
1da177e4 LT |
2745 | /* Answer in remaining cases depends on existance of |
2746 | * conflicting state; so we must wait out the grace period. */ | |
2747 | return nfserr_grace; | |
2748 | } else if (flags & WR_STATE) | |
2749 | return nfs4_share_conflict(current_fh, | |
2750 | NFS4_SHARE_DENY_WRITE); | |
2751 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2752 | return nfs4_share_conflict(current_fh, | |
2753 | NFS4_SHARE_DENY_READ); | |
2754 | } | |
2755 | ||
2756 | /* | |
2757 | * Allow READ/WRITE during grace period on recovered state only for files | |
2758 | * that are not able to provide mandatory locking. | |
2759 | */ | |
2760 | static inline int | |
18f82731 | 2761 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2762 | { |
203a8c8e | 2763 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2764 | } |
2765 | ||
6668958f | 2766 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2767 | { |
6668958f AA |
2768 | /* |
2769 | * When sessions are used the stateid generation number is ignored | |
2770 | * when it is zero. | |
2771 | */ | |
2772 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2773 | goto out; | |
2774 | ||
0836f587 BF |
2775 | /* If the client sends us a stateid from the future, it's buggy: */ |
2776 | if (in->si_generation > ref->si_generation) | |
2777 | return nfserr_bad_stateid; | |
2778 | /* | |
2779 | * The following, however, can happen. For example, if the | |
2780 | * client sends an open and some IO at the same time, the open | |
2781 | * may bump si_generation while the IO is still in flight. | |
2782 | * Thanks to hard links and renames, the client never knows what | |
2783 | * file an open will affect. So it could avoid that situation | |
2784 | * only by serializing all opens and IO from the same open | |
2785 | * owner. To recover from the old_stateid error, the client | |
2786 | * will just have to retry the IO: | |
2787 | */ | |
2788 | if (in->si_generation < ref->si_generation) | |
2789 | return nfserr_old_stateid; | |
6668958f | 2790 | out: |
0836f587 BF |
2791 | return nfs_ok; |
2792 | } | |
2793 | ||
3e633079 BF |
2794 | static int is_delegation_stateid(stateid_t *stateid) |
2795 | { | |
2796 | return stateid->si_fileid == 0; | |
2797 | } | |
2798 | ||
1da177e4 LT |
2799 | /* |
2800 | * Checks for stateid operations | |
2801 | */ | |
b37ad28b | 2802 | __be32 |
dd453dfd BH |
2803 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2804 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2805 | { |
2806 | struct nfs4_stateid *stp = NULL; | |
2807 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2808 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2809 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2810 | __be32 status; |
1da177e4 | 2811 | |
1da177e4 LT |
2812 | if (filpp) |
2813 | *filpp = NULL; | |
2814 | ||
18f82731 | 2815 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2816 | return nfserr_grace; |
2817 | ||
6668958f AA |
2818 | if (nfsd4_has_session(cstate)) |
2819 | flags |= HAS_SESSION; | |
2820 | ||
1da177e4 LT |
2821 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2822 | return check_special_stateids(current_fh, stateid, flags); | |
2823 | ||
1da177e4 LT |
2824 | status = nfserr_stale_stateid; |
2825 | if (STALE_STATEID(stateid)) | |
2826 | goto out; | |
2827 | ||
1da177e4 | 2828 | status = nfserr_bad_stateid; |
3e633079 | 2829 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2830 | dp = find_delegation_stateid(ino, stateid); |
78155ed7 BN |
2831 | if (!dp) { |
2832 | status = stateid_error_map(stateid); | |
1da177e4 | 2833 | goto out; |
78155ed7 | 2834 | } |
6668958f AA |
2835 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2836 | flags); | |
0c2a498f BF |
2837 | if (status) |
2838 | goto out; | |
dc9bf700 BF |
2839 | status = nfs4_check_delegmode(dp, flags); |
2840 | if (status) | |
2841 | goto out; | |
2842 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2843 | if (filpp) |
2844 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2845 | } else { /* open or lock stateid */ |
a4455be0 | 2846 | stp = find_stateid(stateid, flags); |
78155ed7 BN |
2847 | if (!stp) { |
2848 | status = stateid_error_map(stateid); | |
1da177e4 | 2849 | goto out; |
78155ed7 | 2850 | } |
6150ef0d | 2851 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2852 | goto out; |
2853 | if (!stp->st_stateowner->so_confirmed) | |
2854 | goto out; | |
6668958f AA |
2855 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2856 | flags); | |
0c2a498f BF |
2857 | if (status) |
2858 | goto out; | |
a4455be0 BF |
2859 | status = nfs4_check_openmode(stp, flags); |
2860 | if (status) | |
1da177e4 LT |
2861 | goto out; |
2862 | renew_client(stp->st_stateowner->so_client); | |
2863 | if (filpp) | |
2864 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2865 | } |
2866 | status = nfs_ok; | |
2867 | out: | |
2868 | return status; | |
2869 | } | |
2870 | ||
4c4cd222 N |
2871 | static inline int |
2872 | setlkflg (int type) | |
2873 | { | |
2874 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2875 | RD_STATE : WR_STATE; | |
2876 | } | |
1da177e4 LT |
2877 | |
2878 | /* | |
2879 | * Checks for sequence id mutating operations. | |
2880 | */ | |
b37ad28b | 2881 | static __be32 |
dd453dfd BH |
2882 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2883 | stateid_t *stateid, int flags, | |
2884 | struct nfs4_stateowner **sopp, | |
2885 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2886 | { |
1da177e4 LT |
2887 | struct nfs4_stateid *stp; |
2888 | struct nfs4_stateowner *sop; | |
dd453dfd | 2889 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2890 | __be32 status; |
1da177e4 | 2891 | |
8c10cbdb BH |
2892 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2893 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2894 | |
1da177e4 LT |
2895 | *stpp = NULL; |
2896 | *sopp = NULL; | |
2897 | ||
1da177e4 | 2898 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2899 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2900 | return nfserr_bad_stateid; |
1da177e4 LT |
2901 | } |
2902 | ||
1da177e4 | 2903 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2904 | return nfserr_stale_stateid; |
6668958f AA |
2905 | |
2906 | if (nfsd4_has_session(cstate)) | |
2907 | flags |= HAS_SESSION; | |
2908 | ||
1da177e4 LT |
2909 | /* |
2910 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2911 | * the confirmed flag is incorrecly set, or the generation | |
2912 | * number is incorrect. | |
1da177e4 | 2913 | */ |
f8816512 N |
2914 | stp = find_stateid(stateid, flags); |
2915 | if (stp == NULL) { | |
2916 | /* | |
2917 | * Also, we should make sure this isn't just the result of | |
2918 | * a replayed close: | |
2919 | */ | |
2920 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2921 | if (sop == NULL) | |
78155ed7 | 2922 | return stateid_error_map(stateid); |
f8816512 N |
2923 | *sopp = sop; |
2924 | goto check_replay; | |
2925 | } | |
1da177e4 | 2926 | |
39325bd0 BF |
2927 | *stpp = stp; |
2928 | *sopp = sop = stp->st_stateowner; | |
2929 | ||
4c4cd222 | 2930 | if (lock) { |
4c4cd222 | 2931 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2932 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2933 | int lkflg = 0; |
b37ad28b | 2934 | __be32 status; |
4c4cd222 N |
2935 | |
2936 | lkflg = setlkflg(lock->lk_type); | |
2937 | ||
2938 | if (lock->lk_is_new) { | |
599e0a22 BF |
2939 | if (!sop->so_is_open_owner) |
2940 | return nfserr_bad_stateid; | |
60adfc50 AA |
2941 | if (!(flags & HAS_SESSION) && |
2942 | !same_clid(&clp->cl_clientid, lockclid)) | |
2943 | return nfserr_bad_stateid; | |
599e0a22 BF |
2944 | /* stp is the open stateid */ |
2945 | status = nfs4_check_openmode(stp, lkflg); | |
2946 | if (status) | |
2947 | return status; | |
2948 | } else { | |
2949 | /* stp is the lock stateid */ | |
2950 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2951 | if (status) | |
2952 | return status; | |
4c4cd222 | 2953 | } |
1da177e4 LT |
2954 | } |
2955 | ||
f3362737 | 2956 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2957 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2958 | return nfserr_bad_stateid; |
1da177e4 LT |
2959 | } |
2960 | ||
1da177e4 LT |
2961 | /* |
2962 | * We now validate the seqid and stateid generation numbers. | |
2963 | * For the moment, we ignore the possibility of | |
2964 | * generation number wraparound. | |
2965 | */ | |
6668958f | 2966 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
2967 | goto check_replay; |
2968 | ||
3a4f98bb | 2969 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2970 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2971 | " unconfirmed stateowner!\n"); |
2972 | return nfserr_bad_stateid; | |
1da177e4 | 2973 | } |
3a4f98bb | 2974 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2975 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2976 | " confirmed yet!\n"); |
2977 | return nfserr_bad_stateid; | |
1da177e4 | 2978 | } |
6668958f | 2979 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
2980 | if (status) |
2981 | return status; | |
52fd004e | 2982 | renew_client(sop->so_client); |
3a4f98bb | 2983 | return nfs_ok; |
1da177e4 | 2984 | |
1da177e4 | 2985 | check_replay: |
bd9aac52 | 2986 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2987 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2988 | /* indicate replay to calling function */ |
a90b061c | 2989 | return nfserr_replay_me; |
1da177e4 | 2990 | } |
2fdada03 | 2991 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2992 | sop->so_seqid, seqid); |
2993 | *sopp = NULL; | |
2994 | return nfserr_bad_seqid; | |
1da177e4 LT |
2995 | } |
2996 | ||
b37ad28b | 2997 | __be32 |
ca364317 | 2998 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2999 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3000 | { |
b37ad28b | 3001 | __be32 status; |
1da177e4 LT |
3002 | struct nfs4_stateowner *sop; |
3003 | struct nfs4_stateid *stp; | |
3004 | ||
3005 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3006 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3007 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3008 | |
ca364317 | 3009 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3010 | if (status) |
3011 | return status; | |
1da177e4 LT |
3012 | |
3013 | nfs4_lock_state(); | |
3014 | ||
dd453dfd | 3015 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3016 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3017 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3018 | &oc->oc_stateowner, &stp, NULL))) |
3019 | goto out; | |
3020 | ||
3021 | sop = oc->oc_stateowner; | |
3022 | sop->so_confirmed = 1; | |
3023 | update_stateid(&stp->st_stateid); | |
3024 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3025 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3026 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3027 | |
3028 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3029 | out: |
f2327d9a | 3030 | if (oc->oc_stateowner) { |
1da177e4 | 3031 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3032 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3033 | } |
1da177e4 LT |
3034 | nfs4_unlock_state(); |
3035 | return status; | |
3036 | } | |
3037 | ||
3038 | ||
3039 | /* | |
3040 | * unset all bits in union bitmap (bmap) that | |
3041 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3042 | */ | |
3043 | static void | |
3044 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3045 | { | |
3046 | int i; | |
3047 | for (i = 1; i < 4; i++) { | |
3048 | if ((i & access) != i) | |
3049 | __clear_bit(i, bmap); | |
3050 | } | |
3051 | } | |
3052 | ||
3053 | static void | |
3054 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3055 | { | |
3056 | int i; | |
3057 | for (i = 0; i < 4; i++) { | |
3058 | if ((i & deny) != i) | |
3059 | __clear_bit(i, bmap); | |
3060 | } | |
3061 | } | |
3062 | ||
b37ad28b | 3063 | __be32 |
ca364317 BF |
3064 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3065 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3066 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3067 | { |
b37ad28b | 3068 | __be32 status; |
1da177e4 LT |
3069 | struct nfs4_stateid *stp; |
3070 | unsigned int share_access; | |
3071 | ||
3072 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3073 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3074 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3075 | |
d87a8ade | 3076 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3077 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3078 | return nfserr_inval; |
3079 | ||
3080 | nfs4_lock_state(); | |
dd453dfd | 3081 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3082 | od->od_seqid, |
1da177e4 | 3083 | &od->od_stateid, |
f3362737 | 3084 | OPEN_STATE, |
1da177e4 LT |
3085 | &od->od_stateowner, &stp, NULL))) |
3086 | goto out; | |
3087 | ||
3088 | status = nfserr_inval; | |
3089 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3090 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3091 | stp->st_access_bmap, od->od_share_access); | |
3092 | goto out; | |
3093 | } | |
3094 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3095 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3096 | stp->st_deny_bmap, od->od_share_deny); | |
3097 | goto out; | |
3098 | } | |
3099 | set_access(&share_access, stp->st_access_bmap); | |
3100 | nfs4_file_downgrade(stp->st_vfs_file, | |
3101 | share_access & ~od->od_share_access); | |
3102 | ||
3103 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3104 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3105 | ||
3106 | update_stateid(&stp->st_stateid); | |
3107 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3108 | status = nfs_ok; | |
3109 | out: | |
f2327d9a | 3110 | if (od->od_stateowner) { |
1da177e4 | 3111 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3112 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3113 | } |
1da177e4 LT |
3114 | nfs4_unlock_state(); |
3115 | return status; | |
3116 | } | |
3117 | ||
3118 | /* | |
3119 | * nfs4_unlock_state() called after encode | |
3120 | */ | |
b37ad28b | 3121 | __be32 |
ca364317 | 3122 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3123 | struct nfsd4_close *close) |
1da177e4 | 3124 | { |
b37ad28b | 3125 | __be32 status; |
1da177e4 LT |
3126 | struct nfs4_stateid *stp; |
3127 | ||
3128 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3129 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3130 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3131 | |
3132 | nfs4_lock_state(); | |
3133 | /* check close_lru for replay */ | |
dd453dfd | 3134 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3135 | close->cl_seqid, |
1da177e4 | 3136 | &close->cl_stateid, |
f3362737 | 3137 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3138 | &close->cl_stateowner, &stp, NULL))) |
3139 | goto out; | |
1da177e4 LT |
3140 | status = nfs_ok; |
3141 | update_stateid(&stp->st_stateid); | |
3142 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3143 | ||
04ef5954 | 3144 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3145 | release_open_stateid(stp); |
04ef5954 BF |
3146 | |
3147 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3148 | * released by the laundromat service after the lease period | |
3149 | * to enable us to handle CLOSE replay | |
3150 | */ | |
3151 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3152 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3153 | out: |
f2327d9a | 3154 | if (close->cl_stateowner) { |
1da177e4 | 3155 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3156 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3157 | } |
1da177e4 LT |
3158 | nfs4_unlock_state(); |
3159 | return status; | |
3160 | } | |
3161 | ||
b37ad28b | 3162 | __be32 |
ca364317 BF |
3163 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3164 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3165 | { |
203a8c8e BF |
3166 | struct nfs4_delegation *dp; |
3167 | stateid_t *stateid = &dr->dr_stateid; | |
3168 | struct inode *inode; | |
b37ad28b | 3169 | __be32 status; |
6668958f | 3170 | int flags = 0; |
1da177e4 | 3171 | |
ca364317 | 3172 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3173 | return status; |
3174 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3175 | |
6668958f AA |
3176 | if (nfsd4_has_session(cstate)) |
3177 | flags |= HAS_SESSION; | |
1da177e4 | 3178 | nfs4_lock_state(); |
203a8c8e BF |
3179 | status = nfserr_bad_stateid; |
3180 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3181 | goto out; | |
3182 | status = nfserr_stale_stateid; | |
3183 | if (STALE_STATEID(stateid)) | |
3184 | goto out; | |
7e0f7cf5 | 3185 | status = nfserr_bad_stateid; |
203a8c8e BF |
3186 | if (!is_delegation_stateid(stateid)) |
3187 | goto out; | |
203a8c8e | 3188 | dp = find_delegation_stateid(inode, stateid); |
78155ed7 BN |
3189 | if (!dp) { |
3190 | status = stateid_error_map(stateid); | |
203a8c8e | 3191 | goto out; |
78155ed7 | 3192 | } |
6668958f | 3193 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3194 | if (status) |
3195 | goto out; | |
3196 | renew_client(dp->dl_client); | |
3197 | ||
3198 | unhash_delegation(dp); | |
1da177e4 | 3199 | out: |
203a8c8e BF |
3200 | nfs4_unlock_state(); |
3201 | ||
1da177e4 LT |
3202 | return status; |
3203 | } | |
3204 | ||
3205 | ||
3206 | /* | |
3207 | * Lock owner state (byte-range locks) | |
3208 | */ | |
3209 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3210 | #define LOCK_HASH_BITS 8 | |
3211 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3212 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3213 | ||
87df4de8 BH |
3214 | static inline u64 |
3215 | end_offset(u64 start, u64 len) | |
3216 | { | |
3217 | u64 end; | |
3218 | ||
3219 | end = start + len; | |
3220 | return end >= start ? end: NFS4_MAX_UINT64; | |
3221 | } | |
3222 | ||
3223 | /* last octet in a range */ | |
3224 | static inline u64 | |
3225 | last_byte_offset(u64 start, u64 len) | |
3226 | { | |
3227 | u64 end; | |
3228 | ||
3229 | BUG_ON(!len); | |
3230 | end = start + len; | |
3231 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3232 | } | |
3233 | ||
1da177e4 LT |
3234 | #define lockownerid_hashval(id) \ |
3235 | ((id) & LOCK_HASH_MASK) | |
3236 | ||
3237 | static inline unsigned int | |
3238 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3239 | struct xdr_netobj *ownername) | |
3240 | { | |
3241 | return (file_hashval(inode) + cl_id | |
3242 | + opaque_hashval(ownername->data, ownername->len)) | |
3243 | & LOCK_HASH_MASK; | |
3244 | } | |
3245 | ||
3246 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3247 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3248 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3249 | ||
fd39ca9a | 3250 | static struct nfs4_stateid * |
1da177e4 LT |
3251 | find_stateid(stateid_t *stid, int flags) |
3252 | { | |
9346eff0 | 3253 | struct nfs4_stateid *local; |
1da177e4 LT |
3254 | u32 st_id = stid->si_stateownerid; |
3255 | u32 f_id = stid->si_fileid; | |
3256 | unsigned int hashval; | |
3257 | ||
3258 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3259 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3260 | hashval = stateid_hashval(st_id, f_id); |
3261 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3262 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3263 | (local->st_stateid.si_fileid == f_id)) | |
3264 | return local; | |
3265 | } | |
3266 | } | |
9346eff0 KK |
3267 | |
3268 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3269 | hashval = stateid_hashval(st_id, f_id); |
3270 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3271 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3272 | (local->st_stateid.si_fileid == f_id)) | |
3273 | return local; | |
3274 | } | |
849823c5 | 3275 | } |
1da177e4 LT |
3276 | return NULL; |
3277 | } | |
3278 | ||
3279 | static struct nfs4_delegation * | |
3280 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3281 | { | |
13cd2184 N |
3282 | struct nfs4_file *fp; |
3283 | struct nfs4_delegation *dl; | |
1da177e4 | 3284 | |
8c10cbdb BH |
3285 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3286 | STATEID_VAL(stid)); | |
1da177e4 | 3287 | |
1da177e4 | 3288 | fp = find_file(ino); |
13cd2184 N |
3289 | if (!fp) |
3290 | return NULL; | |
3291 | dl = find_delegation_file(fp, stid); | |
3292 | put_nfs4_file(fp); | |
3293 | return dl; | |
1da177e4 LT |
3294 | } |
3295 | ||
3296 | /* | |
3297 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3298 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3299 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3300 | * locking, this prevents us from being completely protocol-compliant. The | |
3301 | * real solution to this problem is to start using unsigned file offsets in | |
3302 | * the VFS, but this is a very deep change! | |
3303 | */ | |
3304 | static inline void | |
3305 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3306 | { | |
3307 | if (lock->fl_start < 0) | |
3308 | lock->fl_start = OFFSET_MAX; | |
3309 | if (lock->fl_end < 0) | |
3310 | lock->fl_end = OFFSET_MAX; | |
3311 | } | |
3312 | ||
d5b9026a N |
3313 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3314 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3315 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3316 | }; |
1da177e4 LT |
3317 | |
3318 | static inline void | |
3319 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3320 | { | |
d5b9026a N |
3321 | struct nfs4_stateowner *sop; |
3322 | unsigned int hval; | |
1da177e4 | 3323 | |
d5b9026a N |
3324 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3325 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3326 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3327 | kref_get(&sop->so_ref); |
3328 | deny->ld_sop = sop; | |
3329 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3330 | } else { |
3331 | deny->ld_sop = NULL; | |
3332 | deny->ld_clientid.cl_boot = 0; | |
3333 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3334 | } |
3335 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3336 | deny->ld_length = NFS4_MAX_UINT64; |
3337 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3338 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3339 | deny->ld_type = NFS4_READ_LT; | |
3340 | if (fl->fl_type != F_RDLCK) | |
3341 | deny->ld_type = NFS4_WRITE_LT; | |
3342 | } | |
3343 | ||
1da177e4 LT |
3344 | static struct nfs4_stateowner * |
3345 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3346 | struct xdr_netobj *owner) | |
3347 | { | |
3348 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3349 | struct nfs4_stateowner *op; | |
3350 | ||
3351 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3352 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3353 | return op; |
3354 | } | |
3355 | return NULL; | |
3356 | } | |
3357 | ||
3358 | /* | |
3359 | * Alloc a lock owner structure. | |
3360 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3361 | * occured. | |
3362 | * | |
3363 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3364 | */ |
3365 | ||
3366 | static struct nfs4_stateowner * | |
3367 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3368 | struct nfs4_stateowner *sop; | |
3369 | struct nfs4_replay *rp; | |
3370 | unsigned int idhashval; | |
3371 | ||
3372 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3373 | return NULL; | |
3374 | idhashval = lockownerid_hashval(current_ownerid); | |
3375 | INIT_LIST_HEAD(&sop->so_idhash); | |
3376 | INIT_LIST_HEAD(&sop->so_strhash); | |
3377 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3378 | INIT_LIST_HEAD(&sop->so_stateids); |
3379 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3380 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3381 | sop->so_time = 0; | |
3382 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3383 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3384 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3385 | sop->so_is_open_owner = 0; |
3386 | sop->so_id = current_ownerid++; | |
3387 | sop->so_client = clp; | |
b59e3c0e NB |
3388 | /* It is the openowner seqid that will be incremented in encode in the |
3389 | * case of new lockowners; so increment the lock seqid manually: */ | |
3390 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3391 | sop->so_confirmed = 1; |
3392 | rp = &sop->so_replay; | |
de1ae286 | 3393 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3394 | rp->rp_buflen = 0; |
3395 | rp->rp_buf = rp->rp_ibuf; | |
3396 | return sop; | |
3397 | } | |
3398 | ||
fd39ca9a | 3399 | static struct nfs4_stateid * |
1da177e4 LT |
3400 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3401 | { | |
3402 | struct nfs4_stateid *stp; | |
3403 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3404 | ||
5ac049ac N |
3405 | stp = nfs4_alloc_stateid(); |
3406 | if (stp == NULL) | |
1da177e4 LT |
3407 | goto out; |
3408 | INIT_LIST_HEAD(&stp->st_hash); | |
3409 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3410 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3411 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3412 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3413 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3414 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3415 | stp->st_stateowner = sop; |
13cd2184 | 3416 | get_nfs4_file(fp); |
1da177e4 | 3417 | stp->st_file = fp; |
78155ed7 | 3418 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
3419 | stp->st_stateid.si_stateownerid = sop->so_id; |
3420 | stp->st_stateid.si_fileid = fp->fi_id; | |
3421 | stp->st_stateid.si_generation = 0; | |
3422 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3423 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3424 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3425 | stp->st_openstp = open_stp; |
1da177e4 LT |
3426 | |
3427 | out: | |
3428 | return stp; | |
3429 | } | |
3430 | ||
fd39ca9a | 3431 | static int |
1da177e4 LT |
3432 | check_lock_length(u64 offset, u64 length) |
3433 | { | |
87df4de8 | 3434 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3435 | LOFF_OVERFLOW(offset, length))); |
3436 | } | |
3437 | ||
3438 | /* | |
3439 | * LOCK operation | |
3440 | */ | |
b37ad28b | 3441 | __be32 |
ca364317 | 3442 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3443 | struct nfsd4_lock *lock) |
1da177e4 | 3444 | { |
3e9e3dbe | 3445 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3446 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3447 | struct nfs4_stateid *lock_stp; |
3448 | struct file *filp; | |
3449 | struct file_lock file_lock; | |
8dc7c311 | 3450 | struct file_lock conflock; |
b37ad28b | 3451 | __be32 status = 0; |
1da177e4 | 3452 | unsigned int strhashval; |
150b3934 | 3453 | unsigned int cmd; |
b8dd7b9a | 3454 | int err; |
1da177e4 LT |
3455 | |
3456 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3457 | (long long) lock->lk_offset, | |
3458 | (long long) lock->lk_length); | |
3459 | ||
1da177e4 LT |
3460 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3461 | return nfserr_inval; | |
3462 | ||
ca364317 | 3463 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3464 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3465 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3466 | return status; | |
3467 | } | |
3468 | ||
1da177e4 LT |
3469 | nfs4_lock_state(); |
3470 | ||
3471 | if (lock->lk_is_new) { | |
893f8770 N |
3472 | /* |
3473 | * Client indicates that this is a new lockowner. | |
3474 | * Use open owner and open stateid to create lock owner and | |
3475 | * lock stateid. | |
3476 | */ | |
1da177e4 LT |
3477 | struct nfs4_stateid *open_stp = NULL; |
3478 | struct nfs4_file *fp; | |
3479 | ||
3480 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3481 | if (!nfsd4_has_session(cstate) && |
3482 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3483 | goto out; |
1da177e4 | 3484 | |
1da177e4 | 3485 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3486 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3487 | lock->lk_new_open_seqid, |
3488 | &lock->lk_new_open_stateid, | |
f3362737 | 3489 | OPEN_STATE, |
3a65588a | 3490 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3491 | lock); |
37515177 | 3492 | if (status) |
1da177e4 | 3493 | goto out; |
3a65588a | 3494 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3495 | /* create lockowner and lock stateid */ |
3496 | fp = open_stp->st_file; | |
3497 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3498 | open_sop->so_client->cl_clientid.cl_id, | |
3499 | &lock->v.new.owner); | |
3e9e3dbe N |
3500 | /* XXX: Do we need to check for duplicate stateowners on |
3501 | * the same file, or should they just be allowed (and | |
3502 | * create new stateids)? */ | |
1da177e4 | 3503 | status = nfserr_resource; |
b59e3c0e NB |
3504 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3505 | open_sop->so_client, open_stp, lock); | |
3506 | if (lock_sop == NULL) | |
1da177e4 | 3507 | goto out; |
b59e3c0e | 3508 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3509 | if (lock_stp == NULL) |
1da177e4 | 3510 | goto out; |
1da177e4 LT |
3511 | } else { |
3512 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3513 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3514 | lock->lk_old_lock_seqid, |
3515 | &lock->lk_old_lock_stateid, | |
f3362737 | 3516 | LOCK_STATE, |
3a65588a | 3517 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3518 | if (status) |
3519 | goto out; | |
3a65588a | 3520 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3521 | } |
3a65588a | 3522 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3523 | filp = lock_stp->st_vfs_file; |
3524 | ||
0dd395dc | 3525 | status = nfserr_grace; |
af558e33 | 3526 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3527 | goto out; |
3528 | status = nfserr_no_grace; | |
af558e33 | 3529 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3530 | goto out; |
3531 | ||
1da177e4 LT |
3532 | locks_init_lock(&file_lock); |
3533 | switch (lock->lk_type) { | |
3534 | case NFS4_READ_LT: | |
3535 | case NFS4_READW_LT: | |
3536 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3537 | cmd = F_SETLK; |
1da177e4 LT |
3538 | break; |
3539 | case NFS4_WRITE_LT: | |
3540 | case NFS4_WRITEW_LT: | |
3541 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3542 | cmd = F_SETLK; |
1da177e4 LT |
3543 | break; |
3544 | default: | |
3545 | status = nfserr_inval; | |
3546 | goto out; | |
3547 | } | |
b59e3c0e | 3548 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3549 | file_lock.fl_pid = current->tgid; |
3550 | file_lock.fl_file = filp; | |
3551 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3552 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3553 | |
3554 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3555 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3556 | nfs4_transform_lock_offset(&file_lock); |
3557 | ||
3558 | /* | |
3559 | * Try to lock the file in the VFS. | |
3560 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3561 | */ | |
3562 | ||
fd85b817 | 3563 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3564 | switch (-err) { |
1da177e4 LT |
3565 | case 0: /* success! */ |
3566 | update_stateid(&lock_stp->st_stateid); | |
3567 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3568 | sizeof(stateid_t)); | |
b8dd7b9a | 3569 | status = 0; |
eb76b3fd AA |
3570 | break; |
3571 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3572 | status = nfserr_denied; | |
3573 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3574 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3575 | break; | |
1da177e4 LT |
3576 | case (EDEADLK): |
3577 | status = nfserr_deadlock; | |
eb76b3fd | 3578 | break; |
1da177e4 | 3579 | default: |
fd85b817 | 3580 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3581 | status = nfserr_resource; |
3582 | break; | |
1da177e4 | 3583 | } |
1da177e4 | 3584 | out: |
8a280510 | 3585 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3586 | release_lockowner(lock_sop); |
3a65588a BF |
3587 | if (lock->lk_replay_owner) { |
3588 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3589 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3590 | } |
1da177e4 LT |
3591 | nfs4_unlock_state(); |
3592 | return status; | |
3593 | } | |
3594 | ||
55ef1274 BF |
3595 | /* |
3596 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3597 | * so we do a temporary open here just to get an open file to pass to | |
3598 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3599 | * inode operation.) | |
3600 | */ | |
3601 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3602 | { | |
3603 | struct file *file; | |
3604 | int err; | |
3605 | ||
3606 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3607 | if (err) | |
3608 | return err; | |
3609 | err = vfs_test_lock(file, lock); | |
3610 | nfsd_close(file); | |
3611 | return err; | |
3612 | } | |
3613 | ||
1da177e4 LT |
3614 | /* |
3615 | * LOCKT operation | |
3616 | */ | |
b37ad28b | 3617 | __be32 |
ca364317 BF |
3618 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3619 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3620 | { |
3621 | struct inode *inode; | |
1da177e4 | 3622 | struct file_lock file_lock; |
fd85b817 | 3623 | int error; |
b37ad28b | 3624 | __be32 status; |
1da177e4 | 3625 | |
af558e33 | 3626 | if (locks_in_grace()) |
1da177e4 LT |
3627 | return nfserr_grace; |
3628 | ||
3629 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3630 | return nfserr_inval; | |
3631 | ||
3632 | lockt->lt_stateowner = NULL; | |
3633 | nfs4_lock_state(); | |
3634 | ||
3635 | status = nfserr_stale_clientid; | |
60adfc50 | 3636 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3637 | goto out; |
1da177e4 | 3638 | |
ca364317 | 3639 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3640 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3641 | if (status == nfserr_symlink) |
3642 | status = nfserr_inval; | |
3643 | goto out; | |
3644 | } | |
3645 | ||
ca364317 | 3646 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3647 | locks_init_lock(&file_lock); |
3648 | switch (lockt->lt_type) { | |
3649 | case NFS4_READ_LT: | |
3650 | case NFS4_READW_LT: | |
3651 | file_lock.fl_type = F_RDLCK; | |
3652 | break; | |
3653 | case NFS4_WRITE_LT: | |
3654 | case NFS4_WRITEW_LT: | |
3655 | file_lock.fl_type = F_WRLCK; | |
3656 | break; | |
3657 | default: | |
2fdada03 | 3658 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3659 | status = nfserr_inval; |
3660 | goto out; | |
3661 | } | |
3662 | ||
3663 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3664 | &lockt->lt_clientid, &lockt->lt_owner); | |
3665 | if (lockt->lt_stateowner) | |
3666 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3667 | file_lock.fl_pid = current->tgid; | |
3668 | file_lock.fl_flags = FL_POSIX; | |
3669 | ||
3670 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3671 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3672 | |
3673 | nfs4_transform_lock_offset(&file_lock); | |
3674 | ||
1da177e4 | 3675 | status = nfs_ok; |
55ef1274 | 3676 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3677 | if (error) { |
3678 | status = nfserrno(error); | |
3679 | goto out; | |
3680 | } | |
9d6a8c5c | 3681 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3682 | status = nfserr_denied; |
9d6a8c5c | 3683 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3684 | } |
3685 | out: | |
3686 | nfs4_unlock_state(); | |
3687 | return status; | |
3688 | } | |
3689 | ||
b37ad28b | 3690 | __be32 |
ca364317 | 3691 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3692 | struct nfsd4_locku *locku) |
1da177e4 LT |
3693 | { |
3694 | struct nfs4_stateid *stp; | |
3695 | struct file *filp = NULL; | |
3696 | struct file_lock file_lock; | |
b37ad28b | 3697 | __be32 status; |
b8dd7b9a | 3698 | int err; |
1da177e4 LT |
3699 | |
3700 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3701 | (long long) locku->lu_offset, | |
3702 | (long long) locku->lu_length); | |
3703 | ||
3704 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3705 | return nfserr_inval; | |
3706 | ||
3707 | nfs4_lock_state(); | |
3708 | ||
dd453dfd | 3709 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3710 | locku->lu_seqid, |
3711 | &locku->lu_stateid, | |
f3362737 | 3712 | LOCK_STATE, |
1da177e4 LT |
3713 | &locku->lu_stateowner, &stp, NULL))) |
3714 | goto out; | |
3715 | ||
3716 | filp = stp->st_vfs_file; | |
3717 | BUG_ON(!filp); | |
3718 | locks_init_lock(&file_lock); | |
3719 | file_lock.fl_type = F_UNLCK; | |
3720 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3721 | file_lock.fl_pid = current->tgid; | |
3722 | file_lock.fl_file = filp; | |
3723 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3724 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3725 | file_lock.fl_start = locku->lu_offset; |
3726 | ||
87df4de8 | 3727 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3728 | nfs4_transform_lock_offset(&file_lock); |
3729 | ||
3730 | /* | |
3731 | * Try to unlock the file in the VFS. | |
3732 | */ | |
fd85b817 | 3733 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3734 | if (err) { |
fd85b817 | 3735 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3736 | goto out_nfserr; |
3737 | } | |
3738 | /* | |
3739 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3740 | */ | |
3741 | update_stateid(&stp->st_stateid); | |
3742 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3743 | ||
3744 | out: | |
f2327d9a | 3745 | if (locku->lu_stateowner) { |
1da177e4 | 3746 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3747 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3748 | } |
1da177e4 LT |
3749 | nfs4_unlock_state(); |
3750 | return status; | |
3751 | ||
3752 | out_nfserr: | |
b8dd7b9a | 3753 | status = nfserrno(err); |
1da177e4 LT |
3754 | goto out; |
3755 | } | |
3756 | ||
3757 | /* | |
3758 | * returns | |
3759 | * 1: locks held by lockowner | |
3760 | * 0: no locks held by lockowner | |
3761 | */ | |
3762 | static int | |
3763 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3764 | { | |
3765 | struct file_lock **flpp; | |
7eaa36e2 | 3766 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3767 | int status = 0; |
3768 | ||
3769 | lock_kernel(); | |
3770 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3771 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3772 | status = 1; |
3773 | goto out; | |
796dadfd | 3774 | } |
1da177e4 LT |
3775 | } |
3776 | out: | |
3777 | unlock_kernel(); | |
3778 | return status; | |
3779 | } | |
3780 | ||
b37ad28b | 3781 | __be32 |
b591480b BF |
3782 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3783 | struct nfsd4_compound_state *cstate, | |
3784 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3785 | { |
3786 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3787 | struct nfs4_stateowner *sop; |
3788 | struct nfs4_stateid *stp; | |
1da177e4 | 3789 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3790 | struct list_head matches; |
3791 | int i; | |
b37ad28b | 3792 | __be32 status; |
1da177e4 LT |
3793 | |
3794 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3795 | clid->cl_boot, clid->cl_id); | |
3796 | ||
3797 | /* XXX check for lease expiration */ | |
3798 | ||
3799 | status = nfserr_stale_clientid; | |
849823c5 | 3800 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3801 | return status; |
1da177e4 LT |
3802 | |
3803 | nfs4_lock_state(); | |
3804 | ||
3e9e3dbe N |
3805 | status = nfserr_locks_held; |
3806 | /* XXX: we're doing a linear search through all the lockowners. | |
3807 | * Yipes! For now we'll just hope clients aren't really using | |
3808 | * release_lockowner much, but eventually we have to fix these | |
3809 | * data structures. */ | |
3810 | INIT_LIST_HEAD(&matches); | |
3811 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3812 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3813 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3814 | continue; |
3815 | list_for_each_entry(stp, &sop->so_stateids, | |
3816 | st_perstateowner) { | |
3817 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3818 | goto out; | |
3819 | /* Note: so_perclient unused for lockowners, | |
3820 | * so it's OK to fool with here. */ | |
3821 | list_add(&sop->so_perclient, &matches); | |
3822 | } | |
1da177e4 | 3823 | } |
3e9e3dbe N |
3824 | } |
3825 | /* Clients probably won't expect us to return with some (but not all) | |
3826 | * of the lockowner state released; so don't release any until all | |
3827 | * have been checked. */ | |
3828 | status = nfs_ok; | |
0fa822e4 N |
3829 | while (!list_empty(&matches)) { |
3830 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3831 | so_perclient); | |
3832 | /* unhash_stateowner deletes so_perclient only | |
3833 | * for openowners. */ | |
3834 | list_del(&sop->so_perclient); | |
f044ff83 | 3835 | release_lockowner(sop); |
1da177e4 LT |
3836 | } |
3837 | out: | |
3838 | nfs4_unlock_state(); | |
3839 | return status; | |
3840 | } | |
3841 | ||
3842 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3843 | alloc_reclaim(void) |
1da177e4 | 3844 | { |
a55370a3 | 3845 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3846 | } |
3847 | ||
c7b9a459 | 3848 | int |
a1bcecd2 | 3849 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3850 | { |
3851 | unsigned int strhashval = clientstr_hashval(name); | |
3852 | struct nfs4_client *clp; | |
3853 | ||
a1bcecd2 | 3854 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3855 | return clp ? 1 : 0; |
3856 | } | |
3857 | ||
1da177e4 LT |
3858 | /* |
3859 | * failure => all reset bets are off, nfserr_no_grace... | |
3860 | */ | |
190e4fbf N |
3861 | int |
3862 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3863 | { |
3864 | unsigned int strhashval; | |
3865 | struct nfs4_client_reclaim *crp = NULL; | |
3866 | ||
a55370a3 N |
3867 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3868 | crp = alloc_reclaim(); | |
1da177e4 LT |
3869 | if (!crp) |
3870 | return 0; | |
a55370a3 | 3871 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3872 | INIT_LIST_HEAD(&crp->cr_strhash); |
3873 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3874 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3875 | reclaim_str_hashtbl_size++; |
3876 | return 1; | |
3877 | } | |
3878 | ||
3879 | static void | |
3880 | nfs4_release_reclaim(void) | |
3881 | { | |
3882 | struct nfs4_client_reclaim *crp = NULL; | |
3883 | int i; | |
3884 | ||
1da177e4 LT |
3885 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3886 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3887 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3888 | struct nfs4_client_reclaim, cr_strhash); | |
3889 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3890 | kfree(crp); |
3891 | reclaim_str_hashtbl_size--; | |
3892 | } | |
3893 | } | |
3894 | BUG_ON(reclaim_str_hashtbl_size); | |
3895 | } | |
3896 | ||
3897 | /* | |
3898 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3899 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3900 | nfs4_find_reclaim_client(clientid_t *clid) |
3901 | { | |
3902 | unsigned int strhashval; | |
3903 | struct nfs4_client *clp; | |
3904 | struct nfs4_client_reclaim *crp = NULL; | |
3905 | ||
3906 | ||
3907 | /* find clientid in conf_id_hashtbl */ | |
3908 | clp = find_confirmed_client(clid); | |
3909 | if (clp == NULL) | |
3910 | return NULL; | |
3911 | ||
a55370a3 N |
3912 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3913 | clp->cl_name.len, clp->cl_name.data, | |
3914 | clp->cl_recdir); | |
1da177e4 LT |
3915 | |
3916 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3917 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3918 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3919 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3920 | return crp; |
3921 | } | |
3922 | } | |
3923 | return NULL; | |
3924 | } | |
3925 | ||
3926 | /* | |
3927 | * Called from OPEN. Look for clientid in reclaim list. | |
3928 | */ | |
b37ad28b | 3929 | __be32 |
1da177e4 LT |
3930 | nfs4_check_open_reclaim(clientid_t *clid) |
3931 | { | |
dfc83565 | 3932 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3933 | } |
3934 | ||
ac4d8ff2 | 3935 | /* initialization to perform at module load time: */ |
1da177e4 | 3936 | |
e8ff2a84 | 3937 | int |
ac4d8ff2 | 3938 | nfs4_state_init(void) |
1da177e4 | 3939 | { |
e8ff2a84 | 3940 | int i, status; |
1da177e4 | 3941 | |
e8ff2a84 BF |
3942 | status = nfsd4_init_slabs(); |
3943 | if (status) | |
3944 | return status; | |
1da177e4 LT |
3945 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3946 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3947 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3948 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3949 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3950 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3951 | } |
5282fd72 ME |
3952 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3953 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3954 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3955 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3956 | } | |
3957 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3958 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3959 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3960 | } | |
3961 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3962 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3963 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3964 | } | |
3965 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3966 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3967 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3968 | } | |
1da177e4 | 3969 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3970 | INIT_LIST_HEAD(&close_lru); |
3971 | INIT_LIST_HEAD(&client_lru); | |
3972 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 3973 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 3974 | return 0; |
ac4d8ff2 N |
3975 | } |
3976 | ||
190e4fbf N |
3977 | static void |
3978 | nfsd4_load_reboot_recovery_data(void) | |
3979 | { | |
3980 | int status; | |
3981 | ||
0964a3d3 N |
3982 | nfs4_lock_state(); |
3983 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3984 | status = nfsd4_recdir_load(); |
0964a3d3 | 3985 | nfs4_unlock_state(); |
190e4fbf N |
3986 | if (status) |
3987 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3988 | } | |
3989 | ||
9a8db97e ME |
3990 | unsigned long |
3991 | get_nfs4_grace_period(void) | |
3992 | { | |
3993 | return max(user_lease_time, lease_time) * HZ; | |
3994 | } | |
3995 | ||
c2f1a551 MS |
3996 | /* |
3997 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3998 | * client may quite reasonably hang on to a delegation as long as it has | |
3999 | * the inode cached. This becomes an obvious problem the first time a | |
4000 | * client's inode cache approaches the size of the server's total memory. | |
4001 | * | |
4002 | * For now we avoid this problem by imposing a hard limit on the number | |
4003 | * of delegations, which varies according to the server's memory size. | |
4004 | */ | |
4005 | static void | |
4006 | set_max_delegations(void) | |
4007 | { | |
4008 | /* | |
4009 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4010 | * estimates suggest that in the worst case (where every delegation | |
4011 | * is for a different inode), a delegation could take about 1.5K, | |
4012 | * giving a worst case usage of about 6% of memory. | |
4013 | */ | |
4014 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4015 | } | |
4016 | ||
ac4d8ff2 N |
4017 | /* initialization to perform when the nfsd service is started: */ |
4018 | ||
29ab23cc | 4019 | static int |
ac4d8ff2 N |
4020 | __nfs4_state_start(void) |
4021 | { | |
9a8db97e | 4022 | unsigned long grace_time; |
ac4d8ff2 | 4023 | |
1da177e4 | 4024 | boot_time = get_seconds(); |
af558e33 | 4025 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 4026 | lease_time = user_lease_time; |
af558e33 | 4027 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
4028 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
4029 | grace_time/HZ); | |
58da282b | 4030 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4031 | if (laundry_wq == NULL) |
4032 | return -ENOMEM; | |
9a8db97e | 4033 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 4034 | set_max_delegations(); |
80fc015b | 4035 | return set_callback_cred(); |
1da177e4 LT |
4036 | } |
4037 | ||
29ab23cc | 4038 | int |
76a3550e | 4039 | nfs4_state_start(void) |
1da177e4 | 4040 | { |
29ab23cc BF |
4041 | int ret; |
4042 | ||
1da177e4 | 4043 | if (nfs4_init) |
29ab23cc | 4044 | return 0; |
190e4fbf | 4045 | nfsd4_load_reboot_recovery_data(); |
29ab23cc BF |
4046 | ret = __nfs4_state_start(); |
4047 | if (ret) | |
4048 | return ret; | |
1da177e4 | 4049 | nfs4_init = 1; |
29ab23cc | 4050 | return 0; |
1da177e4 LT |
4051 | } |
4052 | ||
1da177e4 LT |
4053 | time_t |
4054 | nfs4_lease_time(void) | |
4055 | { | |
4056 | return lease_time; | |
4057 | } | |
4058 | ||
4059 | static void | |
4060 | __nfs4_state_shutdown(void) | |
4061 | { | |
4062 | int i; | |
4063 | struct nfs4_client *clp = NULL; | |
4064 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4065 | struct list_head *pos, *next, reaplist; |
4066 | ||
1da177e4 LT |
4067 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4068 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4069 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4070 | expire_client(clp); | |
4071 | } | |
4072 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4073 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4074 | expire_client(clp); | |
4075 | } | |
4076 | } | |
4077 | INIT_LIST_HEAD(&reaplist); | |
4078 | spin_lock(&recall_lock); | |
4079 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4080 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4081 | list_move(&dp->dl_recall_lru, &reaplist); | |
4082 | } | |
4083 | spin_unlock(&recall_lock); | |
4084 | list_for_each_safe(pos, next, &reaplist) { | |
4085 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4086 | list_del_init(&dp->dl_recall_lru); | |
4087 | unhash_delegation(dp); | |
4088 | } | |
4089 | ||
190e4fbf | 4090 | nfsd4_shutdown_recdir(); |
1da177e4 | 4091 | nfs4_init = 0; |
1da177e4 LT |
4092 | } |
4093 | ||
4094 | void | |
4095 | nfs4_state_shutdown(void) | |
4096 | { | |
5e8d5c29 N |
4097 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4098 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4099 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4100 | nfs4_lock_state(); |
4101 | nfs4_release_reclaim(); | |
4102 | __nfs4_state_shutdown(); | |
1da177e4 LT |
4103 | nfs4_unlock_state(); |
4104 | } | |
4105 | ||
3dd98a3b JL |
4106 | /* |
4107 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4108 | * accessed when nfsd is starting. | |
4109 | */ | |
0964a3d3 N |
4110 | static void |
4111 | nfs4_set_recdir(char *recdir) | |
4112 | { | |
0964a3d3 | 4113 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4114 | } |
4115 | ||
4116 | /* | |
4117 | * Change the NFSv4 recovery directory to recdir. | |
4118 | */ | |
4119 | int | |
4120 | nfs4_reset_recoverydir(char *recdir) | |
4121 | { | |
4122 | int status; | |
a63bb996 | 4123 | struct path path; |
0964a3d3 | 4124 | |
a63bb996 | 4125 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4126 | if (status) |
4127 | return status; | |
4128 | status = -ENOTDIR; | |
a63bb996 | 4129 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4130 | nfs4_set_recdir(recdir); |
4131 | status = 0; | |
4132 | } | |
a63bb996 | 4133 | path_put(&path); |
0964a3d3 N |
4134 | return status; |
4135 | } | |
4136 | ||
3dd98a3b JL |
4137 | char * |
4138 | nfs4_recoverydir(void) | |
4139 | { | |
4140 | return user_recovery_dirname; | |
4141 | } | |
4142 | ||
1da177e4 LT |
4143 | /* |
4144 | * Called when leasetime is changed. | |
4145 | * | |
d99a05ad N |
4146 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
4147 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
4148 | * we start to register any changes in lease time. If the administrator | |
4149 | * really wants to change the lease time *now*, they can go ahead and bring | |
4150 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
4151 | * |
4152 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
4153 | * when nfsd is starting | |
1da177e4 LT |
4154 | */ |
4155 | void | |
4156 | nfs4_reset_lease(time_t leasetime) | |
4157 | { | |
d99a05ad | 4158 | user_lease_time = leasetime; |
1da177e4 | 4159 | } |