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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 | ||
aceaf78d | 37 | #include <linux/file.h> |
1da177e4 | 38 | #include <linux/smp_lock.h> |
0964a3d3 | 39 | #include <linux/namei.h> |
c2f1a551 | 40 | #include <linux/swap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
49 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 50 | static time_t user_lease_time = 90; |
fd39ca9a | 51 | static time_t boot_time; |
1da177e4 LT |
52 | static u32 current_ownerid = 1; |
53 | static u32 current_fileid = 1; | |
54 | static u32 current_delegid = 1; | |
55 | static u32 nfs4_init; | |
fd39ca9a N |
56 | static stateid_t zerostateid; /* bits all 0 */ |
57 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 58 | static u64 current_sessionid = 1; |
fd39ca9a N |
59 | |
60 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
61 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 62 | |
1da177e4 | 63 | /* forward declarations */ |
fd39ca9a | 64 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 65 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
66 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
67 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 68 | |
8b671b80 BF |
69 | /* Locking: */ |
70 | ||
71 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 72 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* |
75 | * Currently used for the del_recall_lru and file hash table. In an | |
76 | * effort to decrease the scope of the client_mutex, this spinlock may | |
77 | * eventually cover more: | |
78 | */ | |
79 | static DEFINE_SPINLOCK(recall_lock); | |
80 | ||
e18b890b CL |
81 | static struct kmem_cache *stateowner_slab = NULL; |
82 | static struct kmem_cache *file_slab = NULL; | |
83 | static struct kmem_cache *stateid_slab = NULL; | |
84 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 85 | |
1da177e4 LT |
86 | void |
87 | nfs4_lock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_lock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | void | |
93 | nfs4_unlock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_unlock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | static inline u32 | |
99 | opaque_hashval(const void *ptr, int nbytes) | |
100 | { | |
101 | unsigned char *cptr = (unsigned char *) ptr; | |
102 | ||
103 | u32 x = 0; | |
104 | while (nbytes--) { | |
105 | x *= 37; | |
106 | x += *cptr++; | |
107 | } | |
108 | return x; | |
109 | } | |
110 | ||
1da177e4 LT |
111 | static struct list_head del_recall_lru; |
112 | ||
13cd2184 N |
113 | static inline void |
114 | put_nfs4_file(struct nfs4_file *fi) | |
115 | { | |
8b671b80 BF |
116 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
117 | list_del(&fi->fi_hash); | |
118 | spin_unlock(&recall_lock); | |
119 | iput(fi->fi_inode); | |
120 | kmem_cache_free(file_slab, fi); | |
121 | } | |
13cd2184 N |
122 | } |
123 | ||
124 | static inline void | |
125 | get_nfs4_file(struct nfs4_file *fi) | |
126 | { | |
8b671b80 | 127 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
128 | } |
129 | ||
ef0f3390 | 130 | static int num_delegations; |
c2f1a551 | 131 | unsigned int max_delegations; |
ef0f3390 N |
132 | |
133 | /* | |
134 | * Open owner state (share locks) | |
135 | */ | |
136 | ||
137 | /* hash tables for nfs4_stateowner */ | |
138 | #define OWNER_HASH_BITS 8 | |
139 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
140 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
141 | ||
142 | #define ownerid_hashval(id) \ | |
143 | ((id) & OWNER_HASH_MASK) | |
144 | #define ownerstr_hashval(clientid, ownername) \ | |
145 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
146 | ||
147 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
148 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
149 | ||
150 | /* hash table for nfs4_file */ | |
151 | #define FILE_HASH_BITS 8 | |
152 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
153 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
154 | /* hash table for (open)nfs4_stateid */ | |
155 | #define STATEID_HASH_BITS 10 | |
156 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
157 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
158 | ||
159 | #define file_hashval(x) \ | |
160 | hash_ptr(x, FILE_HASH_BITS) | |
161 | #define stateid_hashval(owner_id, file_id) \ | |
162 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
163 | ||
164 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
165 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
166 | ||
1da177e4 LT |
167 | static struct nfs4_delegation * |
168 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
169 | { | |
170 | struct nfs4_delegation *dp; | |
171 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 172 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
173 | |
174 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
175 | if (fp->fi_had_conflict) |
176 | return NULL; | |
c2f1a551 | 177 | if (num_delegations > max_delegations) |
ef0f3390 | 178 | return NULL; |
5b2d21c1 N |
179 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
180 | if (dp == NULL) | |
1da177e4 | 181 | return dp; |
ef0f3390 | 182 | num_delegations++; |
ea1da636 N |
183 | INIT_LIST_HEAD(&dp->dl_perfile); |
184 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
185 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
186 | dp->dl_client = clp; | |
13cd2184 | 187 | get_nfs4_file(fp); |
1da177e4 LT |
188 | dp->dl_file = fp; |
189 | dp->dl_flock = NULL; | |
190 | get_file(stp->st_vfs_file); | |
191 | dp->dl_vfs_file = stp->st_vfs_file; | |
192 | dp->dl_type = type; | |
b53d40c5 | 193 | dp->dl_ident = cb->cb_ident; |
78155ed7 | 194 | dp->dl_stateid.si_boot = get_seconds(); |
1da177e4 LT |
195 | dp->dl_stateid.si_stateownerid = current_delegid++; |
196 | dp->dl_stateid.si_fileid = 0; | |
197 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 198 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
199 | dp->dl_time = 0; |
200 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
201 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
202 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
203 | return dp; |
204 | } | |
205 | ||
206 | void | |
207 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
208 | { | |
209 | if (atomic_dec_and_test(&dp->dl_count)) { | |
210 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 211 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 212 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 213 | num_delegations--; |
1da177e4 LT |
214 | } |
215 | } | |
216 | ||
217 | /* Remove the associated file_lock first, then remove the delegation. | |
218 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
219 | * the i_flock list, eventually calling nfsd's lock_manager | |
220 | * fl_release_callback. | |
221 | */ | |
222 | static void | |
223 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
224 | { | |
225 | struct file *filp = dp->dl_vfs_file; | |
226 | ||
227 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
228 | dp->dl_vfs_file = NULL; | |
229 | /* The following nfsd_close may not actually close the file, | |
230 | * but we want to remove the lease in any case. */ | |
c907132d | 231 | if (dp->dl_flock) |
a9933cea | 232 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 233 | nfsd_close(filp); |
1da177e4 LT |
234 | } |
235 | ||
236 | /* Called under the state lock. */ | |
237 | static void | |
238 | unhash_delegation(struct nfs4_delegation *dp) | |
239 | { | |
ea1da636 N |
240 | list_del_init(&dp->dl_perfile); |
241 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
242 | spin_lock(&recall_lock); |
243 | list_del_init(&dp->dl_recall_lru); | |
244 | spin_unlock(&recall_lock); | |
245 | nfs4_close_delegation(dp); | |
246 | nfs4_put_delegation(dp); | |
247 | } | |
248 | ||
249 | /* | |
250 | * SETCLIENTID state | |
251 | */ | |
252 | ||
253 | /* Hash tables for nfs4_clientid state */ | |
254 | #define CLIENT_HASH_BITS 4 | |
255 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
256 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
257 | ||
258 | #define clientid_hashval(id) \ | |
259 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
260 | #define clientstr_hashval(name) \ |
261 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
262 | /* |
263 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
264 | * used in reboot/reset lease grace period processing | |
265 | * | |
266 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
267 | * setclientid_confirmed info. | |
268 | * | |
269 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
270 | * setclientid info. | |
271 | * | |
272 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
273 | * for lease renewal. | |
274 | * | |
275 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
276 | * for last close replay. | |
277 | */ | |
278 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
279 | static int reclaim_str_hashtbl_size = 0; | |
280 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
281 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
282 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
283 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
284 | static struct list_head client_lru; | |
285 | static struct list_head close_lru; | |
286 | ||
2283963f BF |
287 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
288 | { | |
289 | list_del(&stp->st_hash); | |
290 | list_del(&stp->st_perfile); | |
291 | list_del(&stp->st_perstateowner); | |
292 | } | |
293 | ||
294 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
295 | { | |
296 | put_nfs4_file(stp->st_file); | |
297 | kmem_cache_free(stateid_slab, stp); | |
298 | } | |
299 | ||
300 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
301 | { | |
302 | unhash_generic_stateid(stp); | |
303 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
304 | free_generic_stateid(stp); | |
305 | } | |
306 | ||
f044ff83 BF |
307 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
308 | { | |
309 | struct nfs4_stateid *stp; | |
310 | ||
311 | list_del(&sop->so_idhash); | |
312 | list_del(&sop->so_strhash); | |
313 | list_del(&sop->so_perstateid); | |
314 | while (!list_empty(&sop->so_stateids)) { | |
315 | stp = list_first_entry(&sop->so_stateids, | |
316 | struct nfs4_stateid, st_perstateowner); | |
317 | release_lock_stateid(stp); | |
318 | } | |
319 | } | |
320 | ||
321 | static void release_lockowner(struct nfs4_stateowner *sop) | |
322 | { | |
323 | unhash_lockowner(sop); | |
324 | nfs4_put_stateowner(sop); | |
325 | } | |
326 | ||
f1d110ca BF |
327 | static void |
328 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
329 | { | |
330 | struct nfs4_stateowner *lock_sop; | |
331 | ||
332 | while (!list_empty(&open_stp->st_lockowners)) { | |
333 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
334 | struct nfs4_stateowner, so_perstateid); | |
335 | /* list_del(&open_stp->st_lockowners); */ | |
336 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 337 | release_lockowner(lock_sop); |
f1d110ca BF |
338 | } |
339 | } | |
340 | ||
2283963f BF |
341 | static void release_open_stateid(struct nfs4_stateid *stp) |
342 | { | |
343 | unhash_generic_stateid(stp); | |
344 | release_stateid_lockowners(stp); | |
345 | nfsd_close(stp->st_vfs_file); | |
346 | free_generic_stateid(stp); | |
347 | } | |
348 | ||
f044ff83 | 349 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
350 | { |
351 | struct nfs4_stateid *stp; | |
352 | ||
353 | list_del(&sop->so_idhash); | |
354 | list_del(&sop->so_strhash); | |
f044ff83 BF |
355 | list_del(&sop->so_perclient); |
356 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 357 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
358 | stp = list_first_entry(&sop->so_stateids, |
359 | struct nfs4_stateid, st_perstateowner); | |
360 | release_open_stateid(stp); | |
f1d110ca BF |
361 | } |
362 | } | |
363 | ||
f044ff83 | 364 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 365 | { |
f044ff83 | 366 | unhash_openowner(sop); |
f1d110ca BF |
367 | list_del(&sop->so_close_lru); |
368 | nfs4_put_stateowner(sop); | |
369 | } | |
370 | ||
5282fd72 ME |
371 | static DEFINE_SPINLOCK(sessionid_lock); |
372 | #define SESSION_HASH_SIZE 512 | |
373 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
374 | ||
375 | static inline int | |
376 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
377 | { | |
378 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
379 | ||
380 | return sid->sequence % SESSION_HASH_SIZE; | |
381 | } | |
382 | ||
383 | static inline void | |
384 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
385 | { | |
386 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
387 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
388 | } | |
389 | ||
ec6b5d7b AA |
390 | static void |
391 | gen_sessionid(struct nfsd4_session *ses) | |
392 | { | |
393 | struct nfs4_client *clp = ses->se_client; | |
394 | struct nfsd4_sessionid *sid; | |
395 | ||
396 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
397 | sid->clientid = clp->cl_clientid; | |
398 | sid->sequence = current_sessionid++; | |
399 | sid->reserved = 0; | |
400 | } | |
401 | ||
402 | /* | |
a649637c AA |
403 | * The protocol defines ca_maxresponssize_cached to include the size of |
404 | * the rpc header, but all we need to cache is the data starting after | |
405 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
406 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
407 | * value that is the number of bytes in our cache plus a few additional | |
408 | * bytes. In order to stay on the safe side, and not promise more than | |
409 | * we can cache, those additional bytes must be the minimum possible: 24 | |
410 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
411 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
412 | * for the SEQUENCE op response: | |
413 | */ | |
414 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
415 | ||
416 | /* | |
417 | * Give the client the number of ca_maxresponsesize_cached slots it | |
418 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
419 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
420 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 421 | * |
a649637c AA |
422 | * If we run out of reserved DRC memory we should (up to a point) |
423 | * re-negotiate active sessions and reduce their slot usage to make | |
424 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 425 | */ |
a649637c | 426 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 427 | { |
a649637c | 428 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 429 | |
5d77ddfb AA |
430 | if (fchan->maxreqs < 1) |
431 | return nfserr_inval; | |
5d77ddfb | 432 | |
a649637c AA |
433 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
434 | size = NFSD_MIN_HDR_SEQ_SZ; | |
435 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
436 | if (size > NFSD_SLOT_CACHE_SIZE) | |
437 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 438 | |
a649637c AA |
439 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
440 | mem = fchan->maxreqs * size; | |
441 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
442 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
443 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
444 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
445 | mem = fchan->maxreqs * size; | |
446 | } | |
ec6b5d7b | 447 | |
4bd9b0f4 | 448 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
449 | /* bound the total session drc memory ussage */ |
450 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
451 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
452 | mem = fchan->maxreqs * size; | |
453 | } | |
0c193054 | 454 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 455 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 456 | |
b101ebbc | 457 | if (fchan->maxreqs == 0) |
bdac86e2 | 458 | return nfserr_serverfault; |
a649637c AA |
459 | |
460 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 461 | return 0; |
ec6b5d7b AA |
462 | } |
463 | ||
464 | /* | |
465 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 466 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
467 | */ |
468 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
469 | struct nfsd4_channel_attrs *session_fchan, |
470 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
471 | { |
472 | int status = 0; | |
ddc04fd4 | 473 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
474 | |
475 | /* headerpadsz set to zero in encode routine */ | |
476 | ||
477 | /* Use the client's max request and max response size if possible */ | |
478 | if (fchan->maxreq_sz > maxcount) | |
479 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 480 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
481 | |
482 | if (fchan->maxresp_sz > maxcount) | |
483 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 484 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 485 | |
ec6b5d7b AA |
486 | /* Use the client's maxops if possible */ |
487 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
488 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 489 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 490 | |
ec6b5d7b AA |
491 | /* FIXME: Error means no more DRC pages so the server should |
492 | * recover pages from existing sessions. For now fail session | |
493 | * creation. | |
494 | */ | |
a649637c | 495 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 496 | |
a649637c | 497 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 498 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
499 | |
500 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
501 | return status; |
502 | } | |
503 | ||
557ce264 AA |
504 | static void |
505 | free_session_slots(struct nfsd4_session *ses) | |
506 | { | |
507 | int i; | |
508 | ||
509 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
510 | kfree(ses->se_slots[i]); | |
511 | } | |
512 | ||
efe0cb6d BF |
513 | /* |
514 | * We don't actually need to cache the rpc and session headers, so we | |
515 | * can allocate a little less for each slot: | |
516 | */ | |
517 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
518 | { | |
519 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
520 | } | |
521 | ||
ec6b5d7b AA |
522 | static int |
523 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
524 | struct nfsd4_create_session *cses) | |
525 | { | |
526 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
527 | struct nfsd4_slot *sp; |
528 | int idx, slotsize, cachesize, i; | |
529 | int status; | |
ec6b5d7b AA |
530 | |
531 | memset(&tmp, 0, sizeof(tmp)); | |
532 | ||
533 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
534 | tmp.se_bchannel = cses->back_channel; |
535 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
536 | &cses->fore_channel); | |
ec6b5d7b AA |
537 | if (status) |
538 | goto out; | |
539 | ||
557ce264 AA |
540 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
541 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
542 | ||
543 | status = nfserr_serverfault; | |
544 | /* allocate struct nfsd4_session and slot table pointers in one piece */ | |
545 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
546 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
547 | if (!new) | |
548 | goto out; | |
549 | ||
550 | memcpy(new, &tmp, sizeof(*new)); | |
551 | ||
557ce264 | 552 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 553 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
554 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
555 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
556 | if (!sp) | |
557 | goto out_free; | |
558 | new->se_slots[i] = sp; | |
559 | } | |
560 | ||
ec6b5d7b AA |
561 | new->se_client = clp; |
562 | gen_sessionid(new); | |
563 | idx = hash_sessionid(&new->se_sessionid); | |
564 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
565 | NFS4_MAX_SESSIONID_LEN); | |
566 | ||
567 | new->se_flags = cses->flags; | |
568 | kref_init(&new->se_ref); | |
569 | spin_lock(&sessionid_lock); | |
570 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); | |
571 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
572 | spin_unlock(&sessionid_lock); | |
573 | ||
574 | status = nfs_ok; | |
575 | out: | |
576 | return status; | |
557ce264 AA |
577 | out_free: |
578 | free_session_slots(new); | |
579 | kfree(new); | |
580 | goto out; | |
ec6b5d7b AA |
581 | } |
582 | ||
5282fd72 ME |
583 | /* caller must hold sessionid_lock */ |
584 | static struct nfsd4_session * | |
585 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
586 | { | |
587 | struct nfsd4_session *elem; | |
588 | int idx; | |
589 | ||
590 | dump_sessionid(__func__, sessionid); | |
591 | idx = hash_sessionid(sessionid); | |
592 | dprintk("%s: idx is %d\n", __func__, idx); | |
593 | /* Search in the appropriate list */ | |
594 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
595 | dump_sessionid("list traversal", &elem->se_sessionid); | |
596 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
597 | NFS4_MAX_SESSIONID_LEN)) { | |
598 | return elem; | |
599 | } | |
600 | } | |
601 | ||
602 | dprintk("%s: session not found\n", __func__); | |
603 | return NULL; | |
604 | } | |
605 | ||
606 | /* caller must hold sessionid_lock */ | |
7116ed6b | 607 | static void |
5282fd72 | 608 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
609 | { |
610 | list_del(&ses->se_hash); | |
611 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
612 | } |
613 | ||
614 | static void | |
615 | release_session(struct nfsd4_session *ses) | |
616 | { | |
617 | spin_lock(&sessionid_lock); | |
618 | unhash_session(ses); | |
619 | spin_unlock(&sessionid_lock); | |
7116ed6b AA |
620 | nfsd4_put_session(ses); |
621 | } | |
622 | ||
623 | void | |
624 | free_session(struct kref *kref) | |
625 | { | |
626 | struct nfsd4_session *ses; | |
dd829c45 | 627 | int mem; |
7116ed6b AA |
628 | |
629 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 630 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 631 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 632 | nfsd_drc_mem_used -= mem; |
be98d1bb | 633 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 634 | free_session_slots(ses); |
7116ed6b AA |
635 | kfree(ses); |
636 | } | |
637 | ||
1da177e4 LT |
638 | static inline void |
639 | renew_client(struct nfs4_client *clp) | |
640 | { | |
641 | /* | |
642 | * Move client to the end to the LRU list. | |
643 | */ | |
644 | dprintk("renewing client (clientid %08x/%08x)\n", | |
645 | clp->cl_clientid.cl_boot, | |
646 | clp->cl_clientid.cl_id); | |
647 | list_move_tail(&clp->cl_lru, &client_lru); | |
648 | clp->cl_time = get_seconds(); | |
649 | } | |
650 | ||
651 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
652 | static int | |
653 | STALE_CLIENTID(clientid_t *clid) | |
654 | { | |
655 | if (clid->cl_boot == boot_time) | |
656 | return 0; | |
60adfc50 AA |
657 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
658 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
659 | return 1; |
660 | } | |
661 | ||
662 | /* | |
663 | * XXX Should we use a slab cache ? | |
664 | * This type of memory management is somewhat inefficient, but we use it | |
665 | * anyway since SETCLIENTID is not a common operation. | |
666 | */ | |
35bba9a3 | 667 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
668 | { |
669 | struct nfs4_client *clp; | |
670 | ||
35bba9a3 BF |
671 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
672 | if (clp == NULL) | |
673 | return NULL; | |
674 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
675 | if (clp->cl_name.data == NULL) { | |
676 | kfree(clp); | |
677 | return NULL; | |
1da177e4 | 678 | } |
35bba9a3 BF |
679 | memcpy(clp->cl_name.data, name.data, name.len); |
680 | clp->cl_name.len = name.len; | |
1da177e4 LT |
681 | return clp; |
682 | } | |
683 | ||
1b1a9b31 BF |
684 | static void |
685 | shutdown_callback_client(struct nfs4_client *clp) | |
686 | { | |
c237dc03 | 687 | struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; |
1b1a9b31 | 688 | |
1b1a9b31 | 689 | if (clnt) { |
404ec117 BF |
690 | /* |
691 | * Callback threads take a reference on the client, so there | |
692 | * should be no outstanding callbacks at this point. | |
693 | */ | |
c237dc03 | 694 | clp->cl_cb_conn.cb_client = NULL; |
1b1a9b31 BF |
695 | rpc_shutdown_client(clnt); |
696 | } | |
697 | } | |
698 | ||
1da177e4 LT |
699 | static inline void |
700 | free_client(struct nfs4_client *clp) | |
701 | { | |
1b1a9b31 | 702 | shutdown_callback_client(clp); |
38524ab3 AA |
703 | if (clp->cl_cb_xprt) |
704 | svc_xprt_put(clp->cl_cb_xprt); | |
1da177e4 LT |
705 | if (clp->cl_cred.cr_group_info) |
706 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 707 | kfree(clp->cl_principal); |
1da177e4 LT |
708 | kfree(clp->cl_name.data); |
709 | kfree(clp); | |
710 | } | |
711 | ||
712 | void | |
713 | put_nfs4_client(struct nfs4_client *clp) | |
714 | { | |
715 | if (atomic_dec_and_test(&clp->cl_count)) | |
716 | free_client(clp); | |
717 | } | |
718 | ||
719 | static void | |
720 | expire_client(struct nfs4_client *clp) | |
721 | { | |
722 | struct nfs4_stateowner *sop; | |
723 | struct nfs4_delegation *dp; | |
1da177e4 LT |
724 | struct list_head reaplist; |
725 | ||
726 | dprintk("NFSD: expire_client cl_count %d\n", | |
727 | atomic_read(&clp->cl_count)); | |
728 | ||
1da177e4 LT |
729 | INIT_LIST_HEAD(&reaplist); |
730 | spin_lock(&recall_lock); | |
ea1da636 N |
731 | while (!list_empty(&clp->cl_delegations)) { |
732 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
733 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
734 | dp->dl_flock); | |
ea1da636 | 735 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
736 | list_move(&dp->dl_recall_lru, &reaplist); |
737 | } | |
738 | spin_unlock(&recall_lock); | |
739 | while (!list_empty(&reaplist)) { | |
740 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
741 | list_del_init(&dp->dl_recall_lru); | |
742 | unhash_delegation(dp); | |
743 | } | |
744 | list_del(&clp->cl_idhash); | |
745 | list_del(&clp->cl_strhash); | |
746 | list_del(&clp->cl_lru); | |
ea1da636 N |
747 | while (!list_empty(&clp->cl_openowners)) { |
748 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 749 | release_openowner(sop); |
1da177e4 | 750 | } |
c4bf7868 ME |
751 | while (!list_empty(&clp->cl_sessions)) { |
752 | struct nfsd4_session *ses; | |
753 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
754 | se_perclnt); | |
755 | release_session(ses); | |
756 | } | |
1da177e4 LT |
757 | put_nfs4_client(clp); |
758 | } | |
759 | ||
35bba9a3 BF |
760 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
761 | { | |
762 | memcpy(target->cl_verifier.data, source->data, | |
763 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
764 | } |
765 | ||
35bba9a3 BF |
766 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
767 | { | |
1da177e4 LT |
768 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
769 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
770 | } | |
771 | ||
35bba9a3 BF |
772 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
773 | { | |
1da177e4 LT |
774 | target->cr_uid = source->cr_uid; |
775 | target->cr_gid = source->cr_gid; | |
776 | target->cr_group_info = source->cr_group_info; | |
777 | get_group_info(target->cr_group_info); | |
778 | } | |
779 | ||
35bba9a3 | 780 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 781 | { |
a55370a3 | 782 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
783 | } |
784 | ||
785 | static int | |
599e0a22 BF |
786 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
787 | { | |
788 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
789 | } |
790 | ||
791 | static int | |
599e0a22 BF |
792 | same_clid(clientid_t *cl1, clientid_t *cl2) |
793 | { | |
794 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
795 | } |
796 | ||
797 | /* XXX what about NGROUP */ | |
798 | static int | |
599e0a22 BF |
799 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
800 | { | |
801 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
802 | } |
803 | ||
5ec7b46c BF |
804 | static void gen_clid(struct nfs4_client *clp) |
805 | { | |
806 | static u32 current_clientid = 1; | |
807 | ||
1da177e4 LT |
808 | clp->cl_clientid.cl_boot = boot_time; |
809 | clp->cl_clientid.cl_id = current_clientid++; | |
810 | } | |
811 | ||
deda2faa BF |
812 | static void gen_confirm(struct nfs4_client *clp) |
813 | { | |
814 | static u32 i; | |
815 | u32 *p; | |
1da177e4 | 816 | |
1da177e4 | 817 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
818 | *p++ = get_seconds(); |
819 | *p++ = i++; | |
1da177e4 LT |
820 | } |
821 | ||
b09333c4 RL |
822 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
823 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
824 | { | |
825 | struct nfs4_client *clp; | |
826 | struct sockaddr *sa = svc_addr(rqstp); | |
827 | char *princ; | |
828 | ||
829 | clp = alloc_client(name); | |
830 | if (clp == NULL) | |
831 | return NULL; | |
832 | ||
833 | princ = svc_gss_principal(rqstp); | |
834 | if (princ) { | |
835 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
836 | if (clp->cl_principal == NULL) { | |
837 | free_client(clp); | |
838 | return NULL; | |
839 | } | |
840 | } | |
841 | ||
842 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
843 | atomic_set(&clp->cl_count, 1); | |
844 | atomic_set(&clp->cl_cb_conn.cb_set, 0); | |
845 | INIT_LIST_HEAD(&clp->cl_idhash); | |
846 | INIT_LIST_HEAD(&clp->cl_strhash); | |
847 | INIT_LIST_HEAD(&clp->cl_openowners); | |
848 | INIT_LIST_HEAD(&clp->cl_delegations); | |
849 | INIT_LIST_HEAD(&clp->cl_sessions); | |
850 | INIT_LIST_HEAD(&clp->cl_lru); | |
851 | clear_bit(0, &clp->cl_cb_slot_busy); | |
852 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
853 | copy_verf(clp, verf); | |
854 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
855 | clp->cl_flavor = rqstp->rq_flavor; | |
856 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
857 | gen_confirm(clp); | |
858 | ||
859 | return clp; | |
860 | } | |
861 | ||
35bba9a3 BF |
862 | static int check_name(struct xdr_netobj name) |
863 | { | |
1da177e4 LT |
864 | if (name.len == 0) |
865 | return 0; | |
866 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 867 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
868 | return 0; |
869 | } | |
870 | return 1; | |
871 | } | |
872 | ||
fd39ca9a | 873 | static void |
1da177e4 LT |
874 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
875 | { | |
876 | unsigned int idhashval; | |
877 | ||
878 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
879 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
880 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
881 | list_add_tail(&clp->cl_lru, &client_lru); | |
882 | clp->cl_time = get_seconds(); | |
883 | } | |
884 | ||
fd39ca9a | 885 | static void |
1da177e4 LT |
886 | move_to_confirmed(struct nfs4_client *clp) |
887 | { | |
888 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
889 | unsigned int strhashval; | |
890 | ||
891 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
892 | list_del_init(&clp->cl_strhash); | |
f116629d | 893 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 894 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
895 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
896 | renew_client(clp); | |
897 | } | |
898 | ||
899 | static struct nfs4_client * | |
900 | find_confirmed_client(clientid_t *clid) | |
901 | { | |
902 | struct nfs4_client *clp; | |
903 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
904 | ||
905 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 906 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
907 | return clp; |
908 | } | |
909 | return NULL; | |
910 | } | |
911 | ||
912 | static struct nfs4_client * | |
913 | find_unconfirmed_client(clientid_t *clid) | |
914 | { | |
915 | struct nfs4_client *clp; | |
916 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
917 | ||
918 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 919 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
920 | return clp; |
921 | } | |
922 | return NULL; | |
923 | } | |
924 | ||
a1bcecd2 AA |
925 | /* |
926 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
927 | * parameter. Matching is based on the fact the at least one of the | |
928 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
929 | * | |
930 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
931 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
932 | * and SET_CLIENTID{,_CONFIRM} | |
933 | */ | |
934 | static inline int | |
935 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
936 | { | |
937 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
938 | return use_exchange_id == has_exchange_flags; | |
939 | } | |
940 | ||
28ce6054 | 941 | static struct nfs4_client * |
a1bcecd2 AA |
942 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
943 | bool use_exchange_id) | |
28ce6054 N |
944 | { |
945 | struct nfs4_client *clp; | |
946 | ||
947 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
948 | if (same_name(clp->cl_recdir, dname) && |
949 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
950 | return clp; |
951 | } | |
952 | return NULL; | |
953 | } | |
954 | ||
955 | static struct nfs4_client * | |
a1bcecd2 AA |
956 | find_unconfirmed_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, &unconf_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 | ||
fd39ca9a | 969 | static void |
fbf4665f | 970 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 971 | { |
c237dc03 | 972 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
973 | unsigned short expected_family; |
974 | ||
975 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
976 | if (se->se_callback_netid_len == 3 && | |
977 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
978 | expected_family = AF_INET; | |
979 | else if (se->se_callback_netid_len == 4 && | |
980 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
981 | expected_family = AF_INET6; | |
982 | else | |
1da177e4 LT |
983 | goto out_err; |
984 | ||
aa9a4ec7 JL |
985 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
986 | se->se_callback_addr_len, | |
987 | (struct sockaddr *) &cb->cb_addr, | |
988 | sizeof(cb->cb_addr)); | |
989 | ||
7077ecba | 990 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 991 | goto out_err; |
aa9a4ec7 | 992 | |
fbf4665f JL |
993 | if (cb->cb_addr.ss_family == AF_INET6) |
994 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
995 | ||
ab52ae6d | 996 | cb->cb_minorversion = 0; |
1da177e4 LT |
997 | cb->cb_prog = se->se_callback_prog; |
998 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
999 | return; |
1000 | out_err: | |
aa9a4ec7 JL |
1001 | cb->cb_addr.ss_family = AF_UNSPEC; |
1002 | cb->cb_addrlen = 0; | |
849823c5 | 1003 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1004 | "will not receive delegations\n", |
1005 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1006 | ||
1da177e4 LT |
1007 | return; |
1008 | } | |
1009 | ||
074fe897 | 1010 | /* |
557ce264 | 1011 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1012 | */ |
074fe897 AA |
1013 | void |
1014 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1015 | { |
557ce264 AA |
1016 | struct nfsd4_slot *slot = resp->cstate.slot; |
1017 | unsigned int base; | |
074fe897 | 1018 | |
557ce264 | 1019 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1020 | |
557ce264 AA |
1021 | slot->sl_opcnt = resp->opcnt; |
1022 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1023 | |
bf864a31 | 1024 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1025 | slot->sl_datalen = 0; |
bf864a31 | 1026 | return; |
074fe897 | 1027 | } |
557ce264 AA |
1028 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1029 | base = (char *)resp->cstate.datap - | |
1030 | (char *)resp->xbuf->head[0].iov_base; | |
1031 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1032 | slot->sl_datalen)) | |
1033 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1034 | return; | |
074fe897 AA |
1035 | } |
1036 | ||
1037 | /* | |
abfabf8c AA |
1038 | * Encode the replay sequence operation from the slot values. |
1039 | * If cachethis is FALSE encode the uncached rep error on the next | |
1040 | * operation which sets resp->p and increments resp->opcnt for | |
1041 | * nfs4svc_encode_compoundres. | |
074fe897 | 1042 | * |
074fe897 | 1043 | */ |
abfabf8c AA |
1044 | static __be32 |
1045 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1046 | struct nfsd4_compoundres *resp) | |
074fe897 | 1047 | { |
abfabf8c AA |
1048 | struct nfsd4_op *op; |
1049 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1050 | |
abfabf8c | 1051 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1052 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1053 | |
abfabf8c AA |
1054 | /* Encode the replayed sequence operation */ |
1055 | op = &args->ops[resp->opcnt - 1]; | |
1056 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1057 | |
abfabf8c | 1058 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1059 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1060 | op = &args->ops[resp->opcnt++]; |
1061 | op->status = nfserr_retry_uncached_rep; | |
1062 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1063 | } |
abfabf8c | 1064 | return op->status; |
074fe897 AA |
1065 | } |
1066 | ||
1067 | /* | |
557ce264 AA |
1068 | * The sequence operation is not cached because we can use the slot and |
1069 | * session values. | |
074fe897 AA |
1070 | */ |
1071 | __be32 | |
bf864a31 AA |
1072 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1073 | struct nfsd4_sequence *seq) | |
074fe897 | 1074 | { |
557ce264 | 1075 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1076 | __be32 status; |
1077 | ||
557ce264 | 1078 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1079 | |
abfabf8c AA |
1080 | /* Either returns 0 or nfserr_retry_uncached */ |
1081 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1082 | if (status == nfserr_retry_uncached_rep) | |
1083 | return status; | |
074fe897 | 1084 | |
557ce264 AA |
1085 | /* The sequence operation has been encoded, cstate->datap set. */ |
1086 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1087 | |
557ce264 AA |
1088 | resp->opcnt = slot->sl_opcnt; |
1089 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1090 | status = slot->sl_status; | |
074fe897 AA |
1091 | |
1092 | return status; | |
1093 | } | |
1094 | ||
0733d213 AA |
1095 | /* |
1096 | * Set the exchange_id flags returned by the server. | |
1097 | */ | |
1098 | static void | |
1099 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1100 | { | |
1101 | /* pNFS is not supported */ | |
1102 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1103 | ||
1104 | /* Referrals are supported, Migration is not. */ | |
1105 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1106 | ||
1107 | /* set the wire flags to return to client. */ | |
1108 | clid->flags = new->cl_exchange_flags; | |
1109 | } | |
1110 | ||
069b6ad4 AA |
1111 | __be32 |
1112 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1113 | struct nfsd4_compound_state *cstate, | |
1114 | struct nfsd4_exchange_id *exid) | |
1115 | { | |
0733d213 AA |
1116 | struct nfs4_client *unconf, *conf, *new; |
1117 | int status; | |
1118 | unsigned int strhashval; | |
1119 | char dname[HEXDIR_LEN]; | |
363168b4 | 1120 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1121 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1122 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1123 | |
363168b4 | 1124 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1125 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1126 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1127 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1128 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1129 | |
1130 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1131 | return nfserr_inval; | |
1132 | ||
1133 | /* Currently only support SP4_NONE */ | |
1134 | switch (exid->spa_how) { | |
1135 | case SP4_NONE: | |
1136 | break; | |
1137 | case SP4_SSV: | |
1138 | return nfserr_encr_alg_unsupp; | |
1139 | default: | |
1140 | BUG(); /* checked by xdr code */ | |
1141 | case SP4_MACH_CRED: | |
1142 | return nfserr_serverfault; /* no excuse :-/ */ | |
1143 | } | |
1144 | ||
1145 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1146 | ||
1147 | if (status) | |
1148 | goto error; | |
1149 | ||
1150 | strhashval = clientstr_hashval(dname); | |
1151 | ||
1152 | nfs4_lock_state(); | |
1153 | status = nfs_ok; | |
1154 | ||
a1bcecd2 | 1155 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1156 | if (conf) { |
1157 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1158 | /* 18.35.4 case 8 */ | |
1159 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1160 | status = nfserr_not_same; | |
1161 | goto out; | |
1162 | } | |
1163 | /* Client reboot: destroy old state */ | |
1164 | expire_client(conf); | |
1165 | goto out_new; | |
1166 | } | |
1167 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1168 | /* 18.35.4 case 9 */ | |
1169 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1170 | status = nfserr_perm; | |
1171 | goto out; | |
1172 | } | |
1173 | expire_client(conf); | |
1174 | goto out_new; | |
1175 | } | |
0733d213 AA |
1176 | /* |
1177 | * Set bit when the owner id and verifier map to an already | |
1178 | * confirmed client id (18.35.3). | |
1179 | */ | |
1180 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1181 | ||
1182 | /* | |
1183 | * Falling into 18.35.4 case 2, possible router replay. | |
1184 | * Leave confirmed record intact and return same result. | |
1185 | */ | |
1186 | copy_verf(conf, &verf); | |
1187 | new = conf; | |
1188 | goto out_copy; | |
6ddbbbfe MS |
1189 | } |
1190 | ||
1191 | /* 18.35.4 case 7 */ | |
1192 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1193 | status = nfserr_noent; | |
1194 | goto out; | |
0733d213 AA |
1195 | } |
1196 | ||
a1bcecd2 | 1197 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1198 | if (unconf) { |
1199 | /* | |
1200 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1201 | * a new unconfirmed record should be generated regardless | |
1202 | * of whether any properties have changed. | |
1203 | */ | |
1204 | expire_client(unconf); | |
1205 | } | |
1206 | ||
1207 | out_new: | |
1208 | /* Normal case */ | |
b09333c4 | 1209 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1210 | if (new == NULL) { |
bdac86e2 | 1211 | status = nfserr_serverfault; |
0733d213 AA |
1212 | goto out; |
1213 | } | |
1214 | ||
0733d213 | 1215 | gen_clid(new); |
0733d213 AA |
1216 | add_to_unconfirmed(new, strhashval); |
1217 | out_copy: | |
1218 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1219 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1220 | ||
38eb76a5 | 1221 | exid->seqid = 1; |
0733d213 AA |
1222 | nfsd4_set_ex_flags(new, exid); |
1223 | ||
1224 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1225 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1226 | status = nfs_ok; |
1227 | ||
1228 | out: | |
1229 | nfs4_unlock_state(); | |
1230 | error: | |
1231 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1232 | return status; | |
069b6ad4 AA |
1233 | } |
1234 | ||
b85d4c01 | 1235 | static int |
88e588d5 | 1236 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1237 | { |
88e588d5 AA |
1238 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1239 | slot_seqid); | |
b85d4c01 BH |
1240 | |
1241 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1242 | if (slot_inuse) { |
1243 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1244 | return nfserr_jukebox; |
1245 | else | |
1246 | return nfserr_seq_misordered; | |
1247 | } | |
1248 | /* Normal */ | |
88e588d5 | 1249 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1250 | return nfs_ok; |
1251 | /* Replay */ | |
88e588d5 | 1252 | if (seqid == slot_seqid) |
b85d4c01 BH |
1253 | return nfserr_replay_cache; |
1254 | /* Wraparound */ | |
88e588d5 | 1255 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1256 | return nfs_ok; |
1257 | /* Misordered replay or misordered new request */ | |
1258 | return nfserr_seq_misordered; | |
1259 | } | |
1260 | ||
49557cc7 AA |
1261 | /* |
1262 | * Cache the create session result into the create session single DRC | |
1263 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1264 | * Do this for solo or embedded create session operations. | |
1265 | */ | |
1266 | static void | |
1267 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1268 | struct nfsd4_clid_slot *slot, int nfserr) | |
1269 | { | |
1270 | slot->sl_status = nfserr; | |
1271 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1272 | } | |
1273 | ||
1274 | static __be32 | |
1275 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1276 | struct nfsd4_clid_slot *slot) | |
1277 | { | |
1278 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1279 | return slot->sl_status; | |
1280 | } | |
1281 | ||
069b6ad4 AA |
1282 | __be32 |
1283 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1284 | struct nfsd4_compound_state *cstate, | |
1285 | struct nfsd4_create_session *cr_ses) | |
1286 | { | |
363168b4 | 1287 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1288 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1289 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1290 | int status = 0; |
1291 | ||
1292 | nfs4_lock_state(); | |
1293 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1294 | conf = find_confirmed_client(&cr_ses->clientid); | |
1295 | ||
1296 | if (conf) { | |
49557cc7 AA |
1297 | cs_slot = &conf->cl_cs_slot; |
1298 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1299 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1300 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1301 | cs_slot->sl_seqid); |
38eb76a5 | 1302 | /* Return the cached reply status */ |
49557cc7 | 1303 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1304 | goto out; |
49557cc7 | 1305 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1306 | status = nfserr_seq_misordered; |
1307 | dprintk("Sequence misordered!\n"); | |
1308 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1309 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1310 | goto out; |
1311 | } | |
49557cc7 | 1312 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1313 | } else if (unconf) { |
1314 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1315 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1316 | status = nfserr_clid_inuse; |
1317 | goto out; | |
1318 | } | |
1319 | ||
49557cc7 AA |
1320 | cs_slot = &unconf->cl_cs_slot; |
1321 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1322 | if (status) { |
1323 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1324 | status = nfserr_seq_misordered; |
49557cc7 | 1325 | goto out_cache; |
ec6b5d7b AA |
1326 | } |
1327 | ||
49557cc7 | 1328 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1329 | move_to_confirmed(unconf); |
1330 | ||
1331 | /* | |
1332 | * We do not support RDMA or persistent sessions | |
1333 | */ | |
1334 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1335 | cr_ses->flags &= ~SESSION4_RDMA; | |
1336 | ||
38524ab3 AA |
1337 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
1338 | unconf->cl_cb_xprt = rqstp->rq_xprt; | |
1339 | svc_xprt_get(unconf->cl_cb_xprt); | |
1340 | rpc_copy_addr( | |
1341 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1342 | sa); | |
1343 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1344 | unconf->cl_cb_conn.cb_minorversion = | |
1345 | cstate->minorversion; | |
1346 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1347 | unconf->cl_cb_seq_nr = 1; |
38524ab3 AA |
1348 | nfsd4_probe_callback(unconf); |
1349 | } | |
ec6b5d7b AA |
1350 | conf = unconf; |
1351 | } else { | |
1352 | status = nfserr_stale_clientid; | |
1353 | goto out; | |
1354 | } | |
1355 | ||
1356 | status = alloc_init_session(rqstp, conf, cr_ses); | |
1357 | if (status) | |
1358 | goto out; | |
1359 | ||
ec6b5d7b AA |
1360 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1361 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1362 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1363 | |
49557cc7 AA |
1364 | out_cache: |
1365 | /* cache solo and embedded create sessions under the state lock */ | |
1366 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1367 | out: |
1368 | nfs4_unlock_state(); | |
1369 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1370 | return status; | |
069b6ad4 AA |
1371 | } |
1372 | ||
1373 | __be32 | |
1374 | nfsd4_destroy_session(struct svc_rqst *r, | |
1375 | struct nfsd4_compound_state *cstate, | |
1376 | struct nfsd4_destroy_session *sessionid) | |
1377 | { | |
e10e0cfc BH |
1378 | struct nfsd4_session *ses; |
1379 | u32 status = nfserr_badsession; | |
1380 | ||
1381 | /* Notes: | |
1382 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1383 | * - Should we return nfserr_back_chan_busy if waiting for | |
1384 | * callbacks on to-be-destroyed session? | |
1385 | * - Do we need to clear any callback info from previous session? | |
1386 | */ | |
1387 | ||
1388 | dump_sessionid(__func__, &sessionid->sessionid); | |
1389 | spin_lock(&sessionid_lock); | |
1390 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1391 | if (!ses) { | |
1392 | spin_unlock(&sessionid_lock); | |
1393 | goto out; | |
1394 | } | |
1395 | ||
1396 | unhash_session(ses); | |
1397 | spin_unlock(&sessionid_lock); | |
1398 | ||
1399 | /* wait for callbacks */ | |
1400 | shutdown_callback_client(ses->se_client); | |
1401 | nfsd4_put_session(ses); | |
1402 | status = nfs_ok; | |
1403 | out: | |
1404 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1405 | return status; | |
069b6ad4 AA |
1406 | } |
1407 | ||
1408 | __be32 | |
b85d4c01 | 1409 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1410 | struct nfsd4_compound_state *cstate, |
1411 | struct nfsd4_sequence *seq) | |
1412 | { | |
f9bb94c4 | 1413 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1414 | struct nfsd4_session *session; |
1415 | struct nfsd4_slot *slot; | |
1416 | int status; | |
1417 | ||
f9bb94c4 AA |
1418 | if (resp->opcnt != 1) |
1419 | return nfserr_sequence_pos; | |
1420 | ||
b85d4c01 BH |
1421 | spin_lock(&sessionid_lock); |
1422 | status = nfserr_badsession; | |
1423 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1424 | if (!session) | |
1425 | goto out; | |
1426 | ||
1427 | status = nfserr_badslot; | |
6c18ba9f | 1428 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1429 | goto out; |
1430 | ||
557ce264 | 1431 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1432 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1433 | ||
a8dfdaeb AA |
1434 | /* We do not negotiate the number of slots yet, so set the |
1435 | * maxslots to the session maxreqs which is used to encode | |
1436 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1437 | seq->maxslots = session->se_fchannel.maxreqs; | |
1438 | ||
88e588d5 | 1439 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1440 | if (status == nfserr_replay_cache) { |
1441 | cstate->slot = slot; | |
1442 | cstate->session = session; | |
da3846a2 | 1443 | /* Return the cached reply status and set cstate->status |
557ce264 | 1444 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1445 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1446 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1447 | goto out; |
b85d4c01 BH |
1448 | } |
1449 | if (status) | |
1450 | goto out; | |
1451 | ||
1452 | /* Success! bump slot seqid */ | |
1453 | slot->sl_inuse = true; | |
1454 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1455 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1456 | |
1457 | cstate->slot = slot; | |
1458 | cstate->session = session; | |
1459 | ||
aaf84eb9 | 1460 | /* Hold a session reference until done processing the compound: |
b85d4c01 BH |
1461 | * nfsd4_put_session called only if the cstate slot is set. |
1462 | */ | |
b85d4c01 BH |
1463 | nfsd4_get_session(session); |
1464 | out: | |
1465 | spin_unlock(&sessionid_lock); | |
aaf84eb9 BH |
1466 | /* Renew the clientid on success and on replay */ |
1467 | if (cstate->session) { | |
1468 | nfs4_lock_state(); | |
1469 | renew_client(session->se_client); | |
1470 | nfs4_unlock_state(); | |
1471 | } | |
b85d4c01 BH |
1472 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1473 | return status; | |
069b6ad4 AA |
1474 | } |
1475 | ||
b37ad28b | 1476 | __be32 |
b591480b BF |
1477 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1478 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1479 | { |
363168b4 | 1480 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1481 | struct xdr_netobj clname = { |
1482 | .len = setclid->se_namelen, | |
1483 | .data = setclid->se_name, | |
1484 | }; | |
1485 | nfs4_verifier clverifier = setclid->se_verf; | |
1486 | unsigned int strhashval; | |
28ce6054 | 1487 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1488 | __be32 status; |
a55370a3 | 1489 | char dname[HEXDIR_LEN]; |
1da177e4 | 1490 | |
1da177e4 | 1491 | if (!check_name(clname)) |
73aea4ec | 1492 | return nfserr_inval; |
1da177e4 | 1493 | |
a55370a3 N |
1494 | status = nfs4_make_rec_clidname(dname, &clname); |
1495 | if (status) | |
73aea4ec | 1496 | return status; |
a55370a3 | 1497 | |
1da177e4 LT |
1498 | /* |
1499 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1500 | * We get here on a DRC miss. | |
1501 | */ | |
1502 | ||
a55370a3 | 1503 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1504 | |
1da177e4 | 1505 | nfs4_lock_state(); |
a1bcecd2 | 1506 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1507 | if (conf) { |
a186e767 | 1508 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1509 | status = nfserr_clid_inuse; |
026722c2 | 1510 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1511 | char addr_str[INET6_ADDRSTRLEN]; |
1512 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1513 | sizeof(addr_str)); | |
1514 | dprintk("NFSD: setclientid: string in use by client " | |
1515 | "at %s\n", addr_str); | |
1da177e4 LT |
1516 | goto out; |
1517 | } | |
1da177e4 | 1518 | } |
a186e767 BF |
1519 | /* |
1520 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1521 | * has a description of SETCLIENTID request processing consisting | |
1522 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1523 | */ | |
a1bcecd2 | 1524 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1525 | status = nfserr_resource; |
1526 | if (!conf) { | |
a186e767 BF |
1527 | /* |
1528 | * RFC 3530 14.2.33 CASE 4: | |
1529 | * placed first, because it is the normal case | |
1da177e4 LT |
1530 | */ |
1531 | if (unconf) | |
1532 | expire_client(unconf); | |
b09333c4 | 1533 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1534 | if (new == NULL) |
1da177e4 | 1535 | goto out; |
1da177e4 | 1536 | gen_clid(new); |
599e0a22 | 1537 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1538 | /* |
a186e767 BF |
1539 | * RFC 3530 14.2.33 CASE 1: |
1540 | * probable callback update | |
1da177e4 | 1541 | */ |
31f4a6c1 N |
1542 | if (unconf) { |
1543 | /* Note this is removing unconfirmed {*x***}, | |
1544 | * which is stronger than RFC recommended {vxc**}. | |
1545 | * This has the advantage that there is at most | |
1546 | * one {*x***} in either list at any time. | |
1547 | */ | |
1548 | expire_client(unconf); | |
1da177e4 | 1549 | } |
b09333c4 | 1550 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1551 | if (new == NULL) |
1da177e4 | 1552 | goto out; |
1da177e4 | 1553 | copy_clid(new, conf); |
1da177e4 LT |
1554 | } else if (!unconf) { |
1555 | /* | |
a186e767 BF |
1556 | * RFC 3530 14.2.33 CASE 2: |
1557 | * probable client reboot; state will be removed if | |
1558 | * confirmed. | |
1da177e4 | 1559 | */ |
b09333c4 | 1560 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1561 | if (new == NULL) |
1da177e4 | 1562 | goto out; |
1da177e4 | 1563 | gen_clid(new); |
49ba8781 | 1564 | } else { |
a186e767 BF |
1565 | /* |
1566 | * RFC 3530 14.2.33 CASE 3: | |
1567 | * probable client reboot; state will be removed if | |
1568 | * confirmed. | |
1da177e4 LT |
1569 | */ |
1570 | expire_client(unconf); | |
b09333c4 | 1571 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1572 | if (new == NULL) |
1da177e4 | 1573 | goto out; |
1da177e4 | 1574 | gen_clid(new); |
1da177e4 | 1575 | } |
fbf4665f | 1576 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1577 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1578 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1579 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1580 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1581 | status = nfs_ok; | |
1582 | out: | |
1583 | nfs4_unlock_state(); | |
1584 | return status; | |
1585 | } | |
1586 | ||
1587 | ||
1588 | /* | |
a186e767 BF |
1589 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1590 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1591 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1592 | */ |
b37ad28b | 1593 | __be32 |
b591480b BF |
1594 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1595 | struct nfsd4_compound_state *cstate, | |
1596 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1597 | { |
363168b4 | 1598 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1599 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1600 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1601 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1602 | __be32 status; |
1da177e4 LT |
1603 | |
1604 | if (STALE_CLIENTID(clid)) | |
1605 | return nfserr_stale_clientid; | |
1606 | /* | |
1607 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1608 | * We get here on a DRC miss. | |
1609 | */ | |
1610 | ||
1611 | nfs4_lock_state(); | |
21ab45a4 N |
1612 | |
1613 | conf = find_confirmed_client(clid); | |
1614 | unconf = find_unconfirmed_client(clid); | |
1615 | ||
1616 | status = nfserr_clid_inuse; | |
363168b4 | 1617 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1618 | goto out; |
363168b4 | 1619 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1620 | goto out; |
1621 | ||
a186e767 BF |
1622 | /* |
1623 | * section 14.2.34 of RFC 3530 has a description of | |
1624 | * SETCLIENTID_CONFIRM request processing consisting | |
1625 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1626 | */ | |
366e0c1d | 1627 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1628 | /* |
1629 | * RFC 3530 14.2.34 CASE 1: | |
1630 | * callback update | |
1631 | */ | |
599e0a22 | 1632 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1633 | status = nfserr_clid_inuse; |
1634 | else { | |
1a69c179 N |
1635 | /* XXX: We just turn off callbacks until we can handle |
1636 | * change request correctly. */ | |
c237dc03 | 1637 | atomic_set(&conf->cl_cb_conn.cb_set, 0); |
1a69c179 | 1638 | expire_client(unconf); |
1da177e4 | 1639 | status = nfs_ok; |
1a69c179 | 1640 | |
1da177e4 | 1641 | } |
f3aba4e5 | 1642 | } else if (conf && !unconf) { |
a186e767 BF |
1643 | /* |
1644 | * RFC 3530 14.2.34 CASE 2: | |
1645 | * probable retransmitted request; play it safe and | |
1646 | * do nothing. | |
7c79f737 | 1647 | */ |
599e0a22 | 1648 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1649 | status = nfserr_clid_inuse; |
21ab45a4 | 1650 | else |
1da177e4 | 1651 | status = nfs_ok; |
7c79f737 | 1652 | } else if (!conf && unconf |
599e0a22 | 1653 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1654 | /* |
1655 | * RFC 3530 14.2.34 CASE 3: | |
1656 | * Normal case; new or rebooted client: | |
7c79f737 | 1657 | */ |
599e0a22 | 1658 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1659 | status = nfserr_clid_inuse; |
1660 | } else { | |
1a69c179 N |
1661 | unsigned int hash = |
1662 | clientstr_hashval(unconf->cl_recdir); | |
1663 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1664 | hash, false); |
1a69c179 | 1665 | if (conf) { |
c7b9a459 | 1666 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1667 | expire_client(conf); |
1668 | } | |
1da177e4 | 1669 | move_to_confirmed(unconf); |
21ab45a4 | 1670 | conf = unconf; |
46f8a64b | 1671 | nfsd4_probe_callback(conf); |
1a69c179 | 1672 | status = nfs_ok; |
1da177e4 | 1673 | } |
599e0a22 BF |
1674 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1675 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1676 | &confirm)))) { |
a186e767 BF |
1677 | /* |
1678 | * RFC 3530 14.2.34 CASE 4: | |
1679 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1680 | */ |
1da177e4 | 1681 | status = nfserr_stale_clientid; |
7c79f737 | 1682 | } else { |
08e8987c N |
1683 | /* check that we have hit one of the cases...*/ |
1684 | status = nfserr_clid_inuse; | |
1685 | } | |
1da177e4 | 1686 | out: |
1da177e4 LT |
1687 | nfs4_unlock_state(); |
1688 | return status; | |
1689 | } | |
1690 | ||
1da177e4 LT |
1691 | /* OPEN Share state helper functions */ |
1692 | static inline struct nfs4_file * | |
1693 | alloc_init_file(struct inode *ino) | |
1694 | { | |
1695 | struct nfs4_file *fp; | |
1696 | unsigned int hashval = file_hashval(ino); | |
1697 | ||
e60d4398 N |
1698 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1699 | if (fp) { | |
8b671b80 | 1700 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1701 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1702 | INIT_LIST_HEAD(&fp->fi_stateids); |
1703 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1704 | spin_lock(&recall_lock); |
1da177e4 | 1705 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1706 | spin_unlock(&recall_lock); |
1da177e4 LT |
1707 | fp->fi_inode = igrab(ino); |
1708 | fp->fi_id = current_fileid++; | |
47f9940c | 1709 | fp->fi_had_conflict = false; |
1da177e4 LT |
1710 | return fp; |
1711 | } | |
1712 | return NULL; | |
1713 | } | |
1714 | ||
e60d4398 | 1715 | static void |
e18b890b | 1716 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1717 | { |
e60d4398 N |
1718 | if (*slab == NULL) |
1719 | return; | |
1a1d92c1 | 1720 | kmem_cache_destroy(*slab); |
e60d4398 | 1721 | *slab = NULL; |
1da177e4 LT |
1722 | } |
1723 | ||
e8ff2a84 | 1724 | void |
1da177e4 LT |
1725 | nfsd4_free_slabs(void) |
1726 | { | |
e60d4398 N |
1727 | nfsd4_free_slab(&stateowner_slab); |
1728 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1729 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1730 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1731 | } |
1da177e4 | 1732 | |
e60d4398 N |
1733 | static int |
1734 | nfsd4_init_slabs(void) | |
1735 | { | |
1736 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1737 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1738 | if (stateowner_slab == NULL) |
1739 | goto out_nomem; | |
1740 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1741 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1742 | if (file_slab == NULL) |
1743 | goto out_nomem; | |
5ac049ac | 1744 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1745 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1746 | if (stateid_slab == NULL) |
1747 | goto out_nomem; | |
5b2d21c1 | 1748 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1749 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1750 | if (deleg_slab == NULL) |
1751 | goto out_nomem; | |
e60d4398 N |
1752 | return 0; |
1753 | out_nomem: | |
1754 | nfsd4_free_slabs(); | |
1755 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1756 | return -ENOMEM; | |
1da177e4 LT |
1757 | } |
1758 | ||
1759 | void | |
1760 | nfs4_free_stateowner(struct kref *kref) | |
1761 | { | |
1762 | struct nfs4_stateowner *sop = | |
1763 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1764 | kfree(sop->so_owner.data); | |
1765 | kmem_cache_free(stateowner_slab, sop); | |
1766 | } | |
1767 | ||
1768 | static inline struct nfs4_stateowner * | |
1769 | alloc_stateowner(struct xdr_netobj *owner) | |
1770 | { | |
1771 | struct nfs4_stateowner *sop; | |
1772 | ||
1773 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1774 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1775 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1776 | sop->so_owner.len = owner->len; | |
1777 | kref_init(&sop->so_ref); | |
1778 | return sop; | |
1779 | } | |
1780 | kmem_cache_free(stateowner_slab, sop); | |
1781 | } | |
1782 | return NULL; | |
1783 | } | |
1784 | ||
1785 | static struct nfs4_stateowner * | |
1786 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1787 | struct nfs4_stateowner *sop; | |
1788 | struct nfs4_replay *rp; | |
1789 | unsigned int idhashval; | |
1790 | ||
1791 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1792 | return NULL; | |
1793 | idhashval = ownerid_hashval(current_ownerid); | |
1794 | INIT_LIST_HEAD(&sop->so_idhash); | |
1795 | INIT_LIST_HEAD(&sop->so_strhash); | |
1796 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1797 | INIT_LIST_HEAD(&sop->so_stateids); |
1798 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1799 | INIT_LIST_HEAD(&sop->so_close_lru); |
1800 | sop->so_time = 0; | |
1801 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1802 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1803 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1804 | sop->so_is_open_owner = 1; |
1805 | sop->so_id = current_ownerid++; | |
1806 | sop->so_client = clp; | |
1807 | sop->so_seqid = open->op_seqid; | |
1808 | sop->so_confirmed = 0; | |
1809 | rp = &sop->so_replay; | |
de1ae286 | 1810 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1811 | rp->rp_buflen = 0; |
1812 | rp->rp_buf = rp->rp_ibuf; | |
1813 | return sop; | |
1814 | } | |
1815 | ||
1da177e4 LT |
1816 | static inline void |
1817 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1818 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1819 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1820 | ||
1821 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1822 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1823 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1824 | INIT_LIST_HEAD(&stp->st_perfile); |
1825 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1826 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1827 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1828 | stp->st_stateowner = sop; |
13cd2184 | 1829 | get_nfs4_file(fp); |
1da177e4 | 1830 | stp->st_file = fp; |
78155ed7 | 1831 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
1832 | stp->st_stateid.si_stateownerid = sop->so_id; |
1833 | stp->st_stateid.si_fileid = fp->fi_id; | |
1834 | stp->st_stateid.si_generation = 0; | |
1835 | stp->st_access_bmap = 0; | |
1836 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1837 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1838 | &stp->st_access_bmap); | |
1da177e4 | 1839 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1840 | stp->st_openstp = NULL; |
1da177e4 LT |
1841 | } |
1842 | ||
fd39ca9a | 1843 | static void |
1da177e4 LT |
1844 | move_to_close_lru(struct nfs4_stateowner *sop) |
1845 | { | |
1846 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1847 | ||
358dd55a | 1848 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1849 | sop->so_time = get_seconds(); |
1850 | } | |
1851 | ||
1da177e4 | 1852 | static int |
599e0a22 BF |
1853 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1854 | clientid_t *clid) | |
1855 | { | |
1856 | return (sop->so_owner.len == owner->len) && | |
1857 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1858 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1859 | } |
1860 | ||
1861 | static struct nfs4_stateowner * | |
1862 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1863 | { | |
1864 | struct nfs4_stateowner *so = NULL; | |
1865 | ||
1866 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1867 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1868 | return so; |
1869 | } | |
1870 | return NULL; | |
1871 | } | |
1872 | ||
1873 | /* search file_hashtbl[] for file */ | |
1874 | static struct nfs4_file * | |
1875 | find_file(struct inode *ino) | |
1876 | { | |
1877 | unsigned int hashval = file_hashval(ino); | |
1878 | struct nfs4_file *fp; | |
1879 | ||
8b671b80 | 1880 | spin_lock(&recall_lock); |
1da177e4 | 1881 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1882 | if (fp->fi_inode == ino) { |
1883 | get_nfs4_file(fp); | |
8b671b80 | 1884 | spin_unlock(&recall_lock); |
1da177e4 | 1885 | return fp; |
13cd2184 | 1886 | } |
1da177e4 | 1887 | } |
8b671b80 | 1888 | spin_unlock(&recall_lock); |
1da177e4 LT |
1889 | return NULL; |
1890 | } | |
1891 | ||
d87a8ade | 1892 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1893 | { |
d87a8ade | 1894 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1895 | return 0; |
d87a8ade AA |
1896 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1897 | return 0; | |
1898 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1899 | if (minorversion && x) { | |
1900 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1901 | return 0; | |
1902 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1903 | return 0; | |
1904 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1905 | } | |
1906 | if (x) | |
8838dc43 BF |
1907 | return 0; |
1908 | return 1; | |
ba5a6a19 BF |
1909 | } |
1910 | ||
8838dc43 | 1911 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1912 | { |
8838dc43 BF |
1913 | /* Note: unlike access bits, deny bits may be zero. */ |
1914 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1915 | } |
1da177e4 | 1916 | |
4f83aa30 BF |
1917 | /* |
1918 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1919 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1920 | * only what share bits are currently in force, but also what | |
1921 | * combinations of share bits previous opens have used. This allows us | |
1922 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1923 | * return an error if the client attempt to downgrade to a combination | |
1924 | * of share bits not explicable by closing some of its previous opens. | |
1925 | * | |
1926 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1927 | * track of access/deny bit combinations; so, e.g., we allow: | |
1928 | * | |
1929 | * OPEN allow read, deny write | |
1930 | * OPEN allow both, deny none | |
1931 | * DOWNGRADE allow read, deny none | |
1932 | * | |
1933 | * which we should reject. | |
1934 | */ | |
fd39ca9a | 1935 | static void |
1da177e4 LT |
1936 | set_access(unsigned int *access, unsigned long bmap) { |
1937 | int i; | |
1938 | ||
1939 | *access = 0; | |
1940 | for (i = 1; i < 4; i++) { | |
1941 | if (test_bit(i, &bmap)) | |
1942 | *access |= i; | |
1943 | } | |
1944 | } | |
1945 | ||
fd39ca9a | 1946 | static void |
1da177e4 LT |
1947 | set_deny(unsigned int *deny, unsigned long bmap) { |
1948 | int i; | |
1949 | ||
1950 | *deny = 0; | |
1951 | for (i = 0; i < 4; i++) { | |
1952 | if (test_bit(i, &bmap)) | |
1953 | *deny |= i ; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | static int | |
1958 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1959 | unsigned int access, deny; | |
1960 | ||
1961 | set_access(&access, stp->st_access_bmap); | |
1962 | set_deny(&deny, stp->st_deny_bmap); | |
1963 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1964 | return 0; | |
1965 | return 1; | |
1966 | } | |
1967 | ||
1968 | /* | |
1969 | * Called to check deny when READ with all zero stateid or | |
1970 | * WRITE with all zero or all one stateid | |
1971 | */ | |
b37ad28b | 1972 | static __be32 |
1da177e4 LT |
1973 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1974 | { | |
1975 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1976 | struct nfs4_file *fp; | |
1977 | struct nfs4_stateid *stp; | |
b37ad28b | 1978 | __be32 ret; |
1da177e4 LT |
1979 | |
1980 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1981 | ||
1982 | fp = find_file(ino); | |
13cd2184 N |
1983 | if (!fp) |
1984 | return nfs_ok; | |
b700949b | 1985 | ret = nfserr_locked; |
1da177e4 | 1986 | /* Search for conflicting share reservations */ |
13cd2184 N |
1987 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1988 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1989 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1990 | goto out; | |
1da177e4 | 1991 | } |
13cd2184 N |
1992 | ret = nfs_ok; |
1993 | out: | |
1994 | put_nfs4_file(fp); | |
1995 | return ret; | |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | static inline void | |
1999 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2000 | { | |
2001 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2002 | drop_file_write_access(filp); |
1da177e4 LT |
2003 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
2004 | } | |
2005 | } | |
2006 | ||
1da177e4 LT |
2007 | /* |
2008 | * Spawn a thread to perform a recall on the delegation represented | |
2009 | * by the lease (file_lock) | |
2010 | * | |
2011 | * Called from break_lease() with lock_kernel() held. | |
2012 | * Note: we assume break_lease will only call this *once* for any given | |
2013 | * lease. | |
2014 | */ | |
2015 | static | |
2016 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2017 | { | |
63e4863f | 2018 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2019 | |
2020 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2021 | if (!dp) | |
2022 | return; | |
2023 | ||
2024 | /* We're assuming the state code never drops its reference | |
2025 | * without first removing the lease. Since we're in this lease | |
2026 | * callback (and since the lease code is serialized by the kernel | |
2027 | * lock) we know the server hasn't removed the lease yet, we know | |
2028 | * it's safe to take a reference: */ | |
2029 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 2030 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
2031 | |
2032 | spin_lock(&recall_lock); | |
2033 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2034 | spin_unlock(&recall_lock); | |
2035 | ||
2036 | /* only place dl_time is set. protected by lock_kernel*/ | |
2037 | dp->dl_time = get_seconds(); | |
2038 | ||
0272e1fd BF |
2039 | /* |
2040 | * We don't want the locks code to timeout the lease for us; | |
2041 | * we'll remove it ourself if the delegation isn't returned | |
2042 | * in time. | |
2043 | */ | |
2044 | fl->fl_break_time = 0; | |
1da177e4 | 2045 | |
63e4863f BF |
2046 | dp->dl_file->fi_had_conflict = true; |
2047 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2048 | } |
2049 | ||
2050 | /* | |
2051 | * The file_lock is being reapd. | |
2052 | * | |
2053 | * Called by locks_free_lock() with lock_kernel() held. | |
2054 | */ | |
2055 | static | |
2056 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2057 | { | |
2058 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2059 | ||
2060 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2061 | ||
2062 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2063 | return; | |
2064 | dp->dl_flock = NULL; | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * Set the delegation file_lock back pointer. | |
2069 | * | |
a9933cea | 2070 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2071 | */ |
2072 | static | |
2073 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2074 | { | |
2075 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2076 | ||
2077 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2078 | if (!dp) | |
2079 | return; | |
2080 | dp->dl_flock = new; | |
2081 | } | |
2082 | ||
2083 | /* | |
a9933cea | 2084 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2085 | */ |
2086 | static | |
2087 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2088 | { | |
2089 | struct nfs4_delegation *onlistd = | |
2090 | (struct nfs4_delegation *)onlist->fl_owner; | |
2091 | struct nfs4_delegation *tryd = | |
2092 | (struct nfs4_delegation *)try->fl_owner; | |
2093 | ||
2094 | if (onlist->fl_lmops != try->fl_lmops) | |
2095 | return 0; | |
2096 | ||
2097 | return onlistd->dl_client == tryd->dl_client; | |
2098 | } | |
2099 | ||
2100 | ||
2101 | static | |
2102 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2103 | { | |
2104 | if (arg & F_UNLCK) | |
2105 | return lease_modify(onlist, arg); | |
2106 | else | |
2107 | return -EAGAIN; | |
2108 | } | |
2109 | ||
7b021967 | 2110 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2111 | .fl_break = nfsd_break_deleg_cb, |
2112 | .fl_release_private = nfsd_release_deleg_cb, | |
2113 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2114 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2115 | .fl_change = nfsd_change_deleg_cb, | |
2116 | }; | |
2117 | ||
2118 | ||
b37ad28b | 2119 | __be32 |
6668958f AA |
2120 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2121 | struct nfsd4_open *open) | |
1da177e4 | 2122 | { |
1da177e4 LT |
2123 | clientid_t *clientid = &open->op_clientid; |
2124 | struct nfs4_client *clp = NULL; | |
2125 | unsigned int strhashval; | |
2126 | struct nfs4_stateowner *sop = NULL; | |
2127 | ||
1da177e4 | 2128 | if (!check_name(open->op_owner)) |
0f442aa2 | 2129 | return nfserr_inval; |
1da177e4 LT |
2130 | |
2131 | if (STALE_CLIENTID(&open->op_clientid)) | |
2132 | return nfserr_stale_clientid; | |
2133 | ||
2134 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2135 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2136 | open->op_stateowner = sop; |
2137 | if (!sop) { | |
2138 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2139 | clp = find_confirmed_client(clientid); |
2140 | if (clp == NULL) | |
0f442aa2 BF |
2141 | return nfserr_expired; |
2142 | goto renew; | |
1da177e4 | 2143 | } |
6668958f AA |
2144 | /* When sessions are used, skip open sequenceid processing */ |
2145 | if (nfsd4_has_session(cstate)) | |
2146 | goto renew; | |
0f442aa2 BF |
2147 | if (!sop->so_confirmed) { |
2148 | /* Replace unconfirmed owners without checking for replay. */ | |
2149 | clp = sop->so_client; | |
f044ff83 | 2150 | release_openowner(sop); |
0f442aa2 BF |
2151 | open->op_stateowner = NULL; |
2152 | goto renew; | |
2153 | } | |
2154 | if (open->op_seqid == sop->so_seqid - 1) { | |
2155 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2156 | return nfserr_replay_me; |
0f442aa2 BF |
2157 | /* The original OPEN failed so spectacularly |
2158 | * that we don't even have replay data saved! | |
2159 | * Therefore, we have no choice but to continue | |
2160 | * processing this OPEN; presumably, we'll | |
2161 | * fail again for the same reason. | |
2162 | */ | |
2163 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2164 | goto renew; | |
2165 | } | |
2166 | if (open->op_seqid != sop->so_seqid) | |
2167 | return nfserr_bad_seqid; | |
1da177e4 | 2168 | renew: |
0f442aa2 BF |
2169 | if (open->op_stateowner == NULL) { |
2170 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2171 | if (sop == NULL) | |
2172 | return nfserr_resource; | |
2173 | open->op_stateowner = sop; | |
2174 | } | |
2175 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2176 | renew_client(sop->so_client); |
0f442aa2 | 2177 | return nfs_ok; |
1da177e4 LT |
2178 | } |
2179 | ||
b37ad28b | 2180 | static inline __be32 |
4a6e43e6 N |
2181 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2182 | { | |
2183 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2184 | return nfserr_openmode; | |
2185 | else | |
2186 | return nfs_ok; | |
2187 | } | |
2188 | ||
52f4fb43 N |
2189 | static struct nfs4_delegation * |
2190 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2191 | { | |
2192 | struct nfs4_delegation *dp; | |
2193 | ||
ea1da636 | 2194 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2195 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2196 | return dp; | |
2197 | } | |
2198 | return NULL; | |
2199 | } | |
2200 | ||
b37ad28b | 2201 | static __be32 |
567d9829 N |
2202 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2203 | struct nfs4_delegation **dp) | |
2204 | { | |
2205 | int flags; | |
b37ad28b | 2206 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2207 | |
2208 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2209 | if (*dp == NULL) | |
c44c5eeb | 2210 | goto out; |
567d9829 N |
2211 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2212 | RD_STATE : WR_STATE; | |
2213 | status = nfs4_check_delegmode(*dp, flags); | |
2214 | if (status) | |
2215 | *dp = NULL; | |
c44c5eeb N |
2216 | out: |
2217 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2218 | return nfs_ok; | |
2219 | if (status) | |
2220 | return status; | |
2221 | open->op_stateowner->so_confirmed = 1; | |
2222 | return nfs_ok; | |
567d9829 N |
2223 | } |
2224 | ||
b37ad28b | 2225 | static __be32 |
1da177e4 LT |
2226 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2227 | { | |
2228 | struct nfs4_stateid *local; | |
b37ad28b | 2229 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2230 | struct nfs4_stateowner *sop = open->op_stateowner; |
2231 | ||
8beefa24 | 2232 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2233 | /* ignore lock owners */ |
2234 | if (local->st_stateowner->so_is_open_owner == 0) | |
2235 | continue; | |
2236 | /* remember if we have seen this open owner */ | |
2237 | if (local->st_stateowner == sop) | |
2238 | *stpp = local; | |
2239 | /* check for conflicting share reservations */ | |
2240 | if (!test_share(local, open)) | |
2241 | goto out; | |
2242 | } | |
2243 | status = 0; | |
2244 | out: | |
2245 | return status; | |
2246 | } | |
2247 | ||
5ac049ac N |
2248 | static inline struct nfs4_stateid * |
2249 | nfs4_alloc_stateid(void) | |
2250 | { | |
2251 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2252 | } | |
2253 | ||
b37ad28b | 2254 | static __be32 |
1da177e4 | 2255 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2256 | struct nfs4_delegation *dp, |
1da177e4 LT |
2257 | struct svc_fh *cur_fh, int flags) |
2258 | { | |
2259 | struct nfs4_stateid *stp; | |
1da177e4 | 2260 | |
5ac049ac | 2261 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2262 | if (stp == NULL) |
2263 | return nfserr_resource; | |
2264 | ||
567d9829 N |
2265 | if (dp) { |
2266 | get_file(dp->dl_vfs_file); | |
2267 | stp->st_vfs_file = dp->dl_vfs_file; | |
2268 | } else { | |
b37ad28b | 2269 | __be32 status; |
567d9829 N |
2270 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2271 | &stp->st_vfs_file); | |
2272 | if (status) { | |
2273 | if (status == nfserr_dropit) | |
2274 | status = nfserr_jukebox; | |
5ac049ac | 2275 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2276 | return status; |
2277 | } | |
1da177e4 | 2278 | } |
1da177e4 LT |
2279 | *stpp = stp; |
2280 | return 0; | |
2281 | } | |
2282 | ||
b37ad28b | 2283 | static inline __be32 |
1da177e4 LT |
2284 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2285 | struct nfsd4_open *open) | |
2286 | { | |
2287 | struct iattr iattr = { | |
2288 | .ia_valid = ATTR_SIZE, | |
2289 | .ia_size = 0, | |
2290 | }; | |
2291 | if (!open->op_truncate) | |
2292 | return 0; | |
2293 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2294 | return nfserr_inval; |
1da177e4 LT |
2295 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2296 | } | |
2297 | ||
b37ad28b | 2298 | static __be32 |
1da177e4 LT |
2299 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2300 | { | |
2301 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2302 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2303 | unsigned int share_access, new_writer; |
b37ad28b | 2304 | __be32 status; |
1da177e4 LT |
2305 | |
2306 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2307 | new_writer = (~share_access) & open->op_share_access |
2308 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2309 | |
6c26d08f | 2310 | if (new_writer) { |
b37ad28b AV |
2311 | int err = get_write_access(inode); |
2312 | if (err) | |
2313 | return nfserrno(err); | |
e518f056 BH |
2314 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2315 | if (err) | |
2316 | return nfserrno(err); | |
2317 | file_take_write(filp); | |
6c26d08f | 2318 | } |
1da177e4 LT |
2319 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2320 | if (status) { | |
6c26d08f BF |
2321 | if (new_writer) |
2322 | put_write_access(inode); | |
1da177e4 LT |
2323 | return status; |
2324 | } | |
2325 | /* remember the open */ | |
6c26d08f | 2326 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2327 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2328 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2329 | |
2330 | return nfs_ok; | |
2331 | } | |
2332 | ||
2333 | ||
1da177e4 | 2334 | static void |
37515177 | 2335 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2336 | { |
37515177 N |
2337 | open->op_stateowner->so_confirmed = 1; |
2338 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2339 | } |
2340 | ||
2341 | /* | |
2342 | * Attempt to hand out a delegation. | |
2343 | */ | |
2344 | static void | |
2345 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2346 | { | |
2347 | struct nfs4_delegation *dp; | |
2348 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
c237dc03 | 2349 | struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; |
1da177e4 LT |
2350 | struct file_lock fl, *flp = &fl; |
2351 | int status, flag = 0; | |
2352 | ||
2353 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2354 | open->op_recall = 0; |
2355 | switch (open->op_claim_type) { | |
2356 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2357 | if (!atomic_read(&cb->cb_set)) | |
2358 | open->op_recall = 1; | |
2359 | flag = open->op_delegate_type; | |
2360 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2361 | goto out; | |
2362 | break; | |
2363 | case NFS4_OPEN_CLAIM_NULL: | |
2364 | /* Let's not give out any delegations till everyone's | |
2365 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2366 | if (locks_in_grace()) |
7b190fec N |
2367 | goto out; |
2368 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
2369 | goto out; | |
2370 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2371 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2372 | else | |
2373 | flag = NFS4_OPEN_DELEGATE_READ; | |
2374 | break; | |
2375 | default: | |
2376 | goto out; | |
2377 | } | |
1da177e4 LT |
2378 | |
2379 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2380 | if (dp == NULL) { | |
2381 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2382 | goto out; | |
2383 | } | |
2384 | locks_init_lock(&fl); | |
2385 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2386 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2387 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2388 | fl.fl_end = OFFSET_MAX; |
2389 | fl.fl_owner = (fl_owner_t)dp; | |
2390 | fl.fl_file = stp->st_vfs_file; | |
2391 | fl.fl_pid = current->tgid; | |
2392 | ||
a9933cea | 2393 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2394 | * the lock_manager callbacks fl_mylease and fl_change are used |
2395 | */ | |
9167f501 | 2396 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2397 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2398 | unhash_delegation(dp); |
1da177e4 LT |
2399 | flag = NFS4_OPEN_DELEGATE_NONE; |
2400 | goto out; | |
2401 | } | |
2402 | ||
2403 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2404 | ||
8c10cbdb BH |
2405 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2406 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2407 | out: |
7b190fec N |
2408 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2409 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2410 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2411 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2412 | open->op_delegate_type = flag; |
2413 | } | |
2414 | ||
2415 | /* | |
2416 | * called with nfs4_lock_state() held. | |
2417 | */ | |
b37ad28b | 2418 | __be32 |
1da177e4 LT |
2419 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2420 | { | |
6668958f | 2421 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2422 | struct nfs4_file *fp = NULL; |
2423 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2424 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2425 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2426 | __be32 status; |
1da177e4 LT |
2427 | |
2428 | status = nfserr_inval; | |
d87a8ade | 2429 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2430 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2431 | goto out; |
2432 | /* | |
2433 | * Lookup file; if found, lookup stateid and check open request, | |
2434 | * and check for delegations in the process of being recalled. | |
2435 | * If not found, create the nfs4_file struct | |
2436 | */ | |
2437 | fp = find_file(ino); | |
2438 | if (fp) { | |
2439 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2440 | goto out; | |
c44c5eeb N |
2441 | status = nfs4_check_deleg(fp, open, &dp); |
2442 | if (status) | |
2443 | goto out; | |
1da177e4 | 2444 | } else { |
c44c5eeb N |
2445 | status = nfserr_bad_stateid; |
2446 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2447 | goto out; | |
1da177e4 LT |
2448 | status = nfserr_resource; |
2449 | fp = alloc_init_file(ino); | |
2450 | if (fp == NULL) | |
2451 | goto out; | |
2452 | } | |
2453 | ||
2454 | /* | |
2455 | * OPEN the file, or upgrade an existing OPEN. | |
2456 | * If truncate fails, the OPEN fails. | |
2457 | */ | |
2458 | if (stp) { | |
2459 | /* Stateid was found, this is an OPEN upgrade */ | |
2460 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2461 | if (status) | |
2462 | goto out; | |
444c2c07 | 2463 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2464 | } else { |
2465 | /* Stateid was not found, this is a new OPEN */ | |
2466 | int flags = 0; | |
9ecb6a08 | 2467 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2468 | flags |= NFSD_MAY_READ; |
1da177e4 | 2469 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2470 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2471 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2472 | if (status) | |
1da177e4 LT |
2473 | goto out; |
2474 | init_stateid(stp, fp, open); | |
2475 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2476 | if (status) { | |
2283963f | 2477 | release_open_stateid(stp); |
1da177e4 LT |
2478 | goto out; |
2479 | } | |
6668958f AA |
2480 | if (nfsd4_has_session(&resp->cstate)) |
2481 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2482 | } |
2483 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2484 | ||
6668958f AA |
2485 | if (nfsd4_has_session(&resp->cstate)) |
2486 | open->op_stateowner->so_confirmed = 1; | |
2487 | ||
1da177e4 LT |
2488 | /* |
2489 | * Attempt to hand out a delegation. No error return, because the | |
2490 | * OPEN succeeds even if we fail. | |
2491 | */ | |
2492 | nfs4_open_delegation(current_fh, open, stp); | |
2493 | ||
2494 | status = nfs_ok; | |
2495 | ||
8c10cbdb BH |
2496 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2497 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2498 | out: |
13cd2184 N |
2499 | if (fp) |
2500 | put_nfs4_file(fp); | |
37515177 N |
2501 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2502 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2503 | /* |
2504 | * To finish the open response, we just need to set the rflags. | |
2505 | */ | |
2506 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2507 | if (!open->op_stateowner->so_confirmed && |
2508 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2509 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2510 | ||
2511 | return status; | |
2512 | } | |
2513 | ||
b37ad28b | 2514 | __be32 |
b591480b BF |
2515 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2516 | clientid_t *clid) | |
1da177e4 LT |
2517 | { |
2518 | struct nfs4_client *clp; | |
b37ad28b | 2519 | __be32 status; |
1da177e4 LT |
2520 | |
2521 | nfs4_lock_state(); | |
2522 | dprintk("process_renew(%08x/%08x): starting\n", | |
2523 | clid->cl_boot, clid->cl_id); | |
2524 | status = nfserr_stale_clientid; | |
2525 | if (STALE_CLIENTID(clid)) | |
2526 | goto out; | |
2527 | clp = find_confirmed_client(clid); | |
2528 | status = nfserr_expired; | |
2529 | if (clp == NULL) { | |
2530 | /* We assume the client took too long to RENEW. */ | |
2531 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2532 | goto out; | |
2533 | } | |
2534 | renew_client(clp); | |
2535 | status = nfserr_cb_path_down; | |
ea1da636 | 2536 | if (!list_empty(&clp->cl_delegations) |
c237dc03 | 2537 | && !atomic_read(&clp->cl_cb_conn.cb_set)) |
1da177e4 LT |
2538 | goto out; |
2539 | status = nfs_ok; | |
2540 | out: | |
2541 | nfs4_unlock_state(); | |
2542 | return status; | |
2543 | } | |
2544 | ||
af558e33 BF |
2545 | struct lock_manager nfsd4_manager = { |
2546 | }; | |
2547 | ||
a76b4319 | 2548 | static void |
af558e33 | 2549 | nfsd4_end_grace(void) |
a76b4319 N |
2550 | { |
2551 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2552 | nfsd4_recdir_purge_old(); |
af558e33 | 2553 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
2554 | } |
2555 | ||
fd39ca9a | 2556 | static time_t |
1da177e4 LT |
2557 | nfs4_laundromat(void) |
2558 | { | |
2559 | struct nfs4_client *clp; | |
2560 | struct nfs4_stateowner *sop; | |
2561 | struct nfs4_delegation *dp; | |
2562 | struct list_head *pos, *next, reaplist; | |
2563 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
2564 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
2565 | time_t u, test_val = NFSD_LEASE_TIME; | |
2566 | ||
2567 | nfs4_lock_state(); | |
2568 | ||
2569 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2570 | if (locks_in_grace()) |
2571 | nfsd4_end_grace(); | |
1da177e4 LT |
2572 | list_for_each_safe(pos, next, &client_lru) { |
2573 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2574 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2575 | t = clp->cl_time - cutoff; | |
2576 | if (clientid_val > t) | |
2577 | clientid_val = t; | |
2578 | break; | |
2579 | } | |
2580 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2581 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2582 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2583 | expire_client(clp); |
2584 | } | |
2585 | INIT_LIST_HEAD(&reaplist); | |
2586 | spin_lock(&recall_lock); | |
2587 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2588 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2589 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2590 | u = dp->dl_time - cutoff; | |
2591 | if (test_val > u) | |
2592 | test_val = u; | |
2593 | break; | |
2594 | } | |
2595 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2596 | dp, dp->dl_flock); | |
2597 | list_move(&dp->dl_recall_lru, &reaplist); | |
2598 | } | |
2599 | spin_unlock(&recall_lock); | |
2600 | list_for_each_safe(pos, next, &reaplist) { | |
2601 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2602 | list_del_init(&dp->dl_recall_lru); | |
2603 | unhash_delegation(dp); | |
2604 | } | |
2605 | test_val = NFSD_LEASE_TIME; | |
2606 | list_for_each_safe(pos, next, &close_lru) { | |
2607 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2608 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2609 | u = sop->so_time - cutoff; | |
2610 | if (test_val > u) | |
2611 | test_val = u; | |
2612 | break; | |
2613 | } | |
2614 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2615 | sop->so_id); | |
f044ff83 | 2616 | release_openowner(sop); |
1da177e4 LT |
2617 | } |
2618 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2619 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2620 | nfs4_unlock_state(); | |
2621 | return clientid_val; | |
2622 | } | |
2623 | ||
a254b246 HH |
2624 | static struct workqueue_struct *laundry_wq; |
2625 | static void laundromat_main(struct work_struct *); | |
2626 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2627 | ||
2628 | static void | |
c4028958 | 2629 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2630 | { |
2631 | time_t t; | |
2632 | ||
2633 | t = nfs4_laundromat(); | |
2634 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2635 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2636 | } |
2637 | ||
fd39ca9a | 2638 | static struct nfs4_stateowner * |
f8816512 N |
2639 | search_close_lru(u32 st_id, int flags) |
2640 | { | |
1da177e4 LT |
2641 | struct nfs4_stateowner *local = NULL; |
2642 | ||
1da177e4 LT |
2643 | if (flags & CLOSE_STATE) { |
2644 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2645 | if (local->so_id == st_id) | |
2646 | return local; | |
2647 | } | |
2648 | } | |
2649 | return NULL; | |
2650 | } | |
2651 | ||
2652 | static inline int | |
2653 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2654 | { | |
7eaa36e2 | 2655 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2656 | } |
2657 | ||
2658 | static int | |
2659 | STALE_STATEID(stateid_t *stateid) | |
2660 | { | |
78155ed7 BN |
2661 | if (time_after((unsigned long)boot_time, |
2662 | (unsigned long)stateid->si_boot)) { | |
8c10cbdb BH |
2663 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
2664 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2665 | return 1; |
2666 | } | |
2667 | return 0; | |
2668 | } | |
2669 | ||
2670 | static int | |
2671 | EXPIRED_STATEID(stateid_t *stateid) | |
2672 | { | |
2673 | if (time_before((unsigned long)boot_time, | |
2674 | ((unsigned long)stateid->si_boot)) && | |
b8fd47ae | 2675 | time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { |
8c10cbdb BH |
2676 | dprintk("NFSD: expired stateid " STATEID_FMT "!\n", |
2677 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2678 | return 1; |
2679 | } | |
2680 | return 0; | |
2681 | } | |
2682 | ||
2683 | static __be32 | |
2684 | stateid_error_map(stateid_t *stateid) | |
2685 | { | |
2686 | if (STALE_STATEID(stateid)) | |
2687 | return nfserr_stale_stateid; | |
2688 | if (EXPIRED_STATEID(stateid)) | |
2689 | return nfserr_expired; | |
2690 | ||
8c10cbdb BH |
2691 | dprintk("NFSD: bad stateid " STATEID_FMT "!\n", |
2692 | STATEID_VAL(stateid)); | |
78155ed7 | 2693 | return nfserr_bad_stateid; |
1da177e4 LT |
2694 | } |
2695 | ||
2696 | static inline int | |
2697 | access_permit_read(unsigned long access_bmap) | |
2698 | { | |
2699 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2700 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2701 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2702 | } | |
2703 | ||
2704 | static inline int | |
2705 | access_permit_write(unsigned long access_bmap) | |
2706 | { | |
2707 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2708 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2709 | } | |
2710 | ||
2711 | static | |
b37ad28b | 2712 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2713 | { |
b37ad28b | 2714 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2715 | |
2716 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2717 | goto out; | |
2718 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2719 | goto out; | |
2720 | status = nfs_ok; | |
2721 | out: | |
2722 | return status; | |
2723 | } | |
2724 | ||
b37ad28b | 2725 | static inline __be32 |
1da177e4 LT |
2726 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2727 | { | |
203a8c8e | 2728 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2729 | return nfs_ok; |
af558e33 | 2730 | else if (locks_in_grace()) { |
1da177e4 LT |
2731 | /* Answer in remaining cases depends on existance of |
2732 | * conflicting state; so we must wait out the grace period. */ | |
2733 | return nfserr_grace; | |
2734 | } else if (flags & WR_STATE) | |
2735 | return nfs4_share_conflict(current_fh, | |
2736 | NFS4_SHARE_DENY_WRITE); | |
2737 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2738 | return nfs4_share_conflict(current_fh, | |
2739 | NFS4_SHARE_DENY_READ); | |
2740 | } | |
2741 | ||
2742 | /* | |
2743 | * Allow READ/WRITE during grace period on recovered state only for files | |
2744 | * that are not able to provide mandatory locking. | |
2745 | */ | |
2746 | static inline int | |
18f82731 | 2747 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2748 | { |
203a8c8e | 2749 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2750 | } |
2751 | ||
6668958f | 2752 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2753 | { |
6668958f AA |
2754 | /* |
2755 | * When sessions are used the stateid generation number is ignored | |
2756 | * when it is zero. | |
2757 | */ | |
2758 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2759 | goto out; | |
2760 | ||
0836f587 BF |
2761 | /* If the client sends us a stateid from the future, it's buggy: */ |
2762 | if (in->si_generation > ref->si_generation) | |
2763 | return nfserr_bad_stateid; | |
2764 | /* | |
2765 | * The following, however, can happen. For example, if the | |
2766 | * client sends an open and some IO at the same time, the open | |
2767 | * may bump si_generation while the IO is still in flight. | |
2768 | * Thanks to hard links and renames, the client never knows what | |
2769 | * file an open will affect. So it could avoid that situation | |
2770 | * only by serializing all opens and IO from the same open | |
2771 | * owner. To recover from the old_stateid error, the client | |
2772 | * will just have to retry the IO: | |
2773 | */ | |
2774 | if (in->si_generation < ref->si_generation) | |
2775 | return nfserr_old_stateid; | |
6668958f | 2776 | out: |
0836f587 BF |
2777 | return nfs_ok; |
2778 | } | |
2779 | ||
3e633079 BF |
2780 | static int is_delegation_stateid(stateid_t *stateid) |
2781 | { | |
2782 | return stateid->si_fileid == 0; | |
2783 | } | |
2784 | ||
1da177e4 LT |
2785 | /* |
2786 | * Checks for stateid operations | |
2787 | */ | |
b37ad28b | 2788 | __be32 |
dd453dfd BH |
2789 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2790 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2791 | { |
2792 | struct nfs4_stateid *stp = NULL; | |
2793 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2794 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2795 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2796 | __be32 status; |
1da177e4 | 2797 | |
1da177e4 LT |
2798 | if (filpp) |
2799 | *filpp = NULL; | |
2800 | ||
18f82731 | 2801 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2802 | return nfserr_grace; |
2803 | ||
6668958f AA |
2804 | if (nfsd4_has_session(cstate)) |
2805 | flags |= HAS_SESSION; | |
2806 | ||
1da177e4 LT |
2807 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2808 | return check_special_stateids(current_fh, stateid, flags); | |
2809 | ||
1da177e4 LT |
2810 | status = nfserr_stale_stateid; |
2811 | if (STALE_STATEID(stateid)) | |
2812 | goto out; | |
2813 | ||
1da177e4 | 2814 | status = nfserr_bad_stateid; |
3e633079 | 2815 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2816 | dp = find_delegation_stateid(ino, stateid); |
78155ed7 BN |
2817 | if (!dp) { |
2818 | status = stateid_error_map(stateid); | |
1da177e4 | 2819 | goto out; |
78155ed7 | 2820 | } |
6668958f AA |
2821 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2822 | flags); | |
0c2a498f BF |
2823 | if (status) |
2824 | goto out; | |
dc9bf700 BF |
2825 | status = nfs4_check_delegmode(dp, flags); |
2826 | if (status) | |
2827 | goto out; | |
2828 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2829 | if (filpp) |
2830 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2831 | } else { /* open or lock stateid */ |
a4455be0 | 2832 | stp = find_stateid(stateid, flags); |
78155ed7 BN |
2833 | if (!stp) { |
2834 | status = stateid_error_map(stateid); | |
1da177e4 | 2835 | goto out; |
78155ed7 | 2836 | } |
6150ef0d | 2837 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2838 | goto out; |
2839 | if (!stp->st_stateowner->so_confirmed) | |
2840 | goto out; | |
6668958f AA |
2841 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2842 | flags); | |
0c2a498f BF |
2843 | if (status) |
2844 | goto out; | |
a4455be0 BF |
2845 | status = nfs4_check_openmode(stp, flags); |
2846 | if (status) | |
1da177e4 LT |
2847 | goto out; |
2848 | renew_client(stp->st_stateowner->so_client); | |
2849 | if (filpp) | |
2850 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2851 | } |
2852 | status = nfs_ok; | |
2853 | out: | |
2854 | return status; | |
2855 | } | |
2856 | ||
4c4cd222 N |
2857 | static inline int |
2858 | setlkflg (int type) | |
2859 | { | |
2860 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2861 | RD_STATE : WR_STATE; | |
2862 | } | |
1da177e4 LT |
2863 | |
2864 | /* | |
2865 | * Checks for sequence id mutating operations. | |
2866 | */ | |
b37ad28b | 2867 | static __be32 |
dd453dfd BH |
2868 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2869 | stateid_t *stateid, int flags, | |
2870 | struct nfs4_stateowner **sopp, | |
2871 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2872 | { |
1da177e4 LT |
2873 | struct nfs4_stateid *stp; |
2874 | struct nfs4_stateowner *sop; | |
dd453dfd | 2875 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2876 | __be32 status; |
1da177e4 | 2877 | |
8c10cbdb BH |
2878 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2879 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2880 | |
1da177e4 LT |
2881 | *stpp = NULL; |
2882 | *sopp = NULL; | |
2883 | ||
1da177e4 | 2884 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2885 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2886 | return nfserr_bad_stateid; |
1da177e4 LT |
2887 | } |
2888 | ||
1da177e4 | 2889 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2890 | return nfserr_stale_stateid; |
6668958f AA |
2891 | |
2892 | if (nfsd4_has_session(cstate)) | |
2893 | flags |= HAS_SESSION; | |
2894 | ||
1da177e4 LT |
2895 | /* |
2896 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2897 | * the confirmed flag is incorrecly set, or the generation | |
2898 | * number is incorrect. | |
1da177e4 | 2899 | */ |
f8816512 N |
2900 | stp = find_stateid(stateid, flags); |
2901 | if (stp == NULL) { | |
2902 | /* | |
2903 | * Also, we should make sure this isn't just the result of | |
2904 | * a replayed close: | |
2905 | */ | |
2906 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2907 | if (sop == NULL) | |
78155ed7 | 2908 | return stateid_error_map(stateid); |
f8816512 N |
2909 | *sopp = sop; |
2910 | goto check_replay; | |
2911 | } | |
1da177e4 | 2912 | |
39325bd0 BF |
2913 | *stpp = stp; |
2914 | *sopp = sop = stp->st_stateowner; | |
2915 | ||
4c4cd222 | 2916 | if (lock) { |
4c4cd222 | 2917 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2918 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2919 | int lkflg = 0; |
b37ad28b | 2920 | __be32 status; |
4c4cd222 N |
2921 | |
2922 | lkflg = setlkflg(lock->lk_type); | |
2923 | ||
2924 | if (lock->lk_is_new) { | |
599e0a22 BF |
2925 | if (!sop->so_is_open_owner) |
2926 | return nfserr_bad_stateid; | |
60adfc50 AA |
2927 | if (!(flags & HAS_SESSION) && |
2928 | !same_clid(&clp->cl_clientid, lockclid)) | |
2929 | return nfserr_bad_stateid; | |
599e0a22 BF |
2930 | /* stp is the open stateid */ |
2931 | status = nfs4_check_openmode(stp, lkflg); | |
2932 | if (status) | |
2933 | return status; | |
2934 | } else { | |
2935 | /* stp is the lock stateid */ | |
2936 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2937 | if (status) | |
2938 | return status; | |
4c4cd222 | 2939 | } |
1da177e4 LT |
2940 | } |
2941 | ||
f3362737 | 2942 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2943 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2944 | return nfserr_bad_stateid; |
1da177e4 LT |
2945 | } |
2946 | ||
1da177e4 LT |
2947 | /* |
2948 | * We now validate the seqid and stateid generation numbers. | |
2949 | * For the moment, we ignore the possibility of | |
2950 | * generation number wraparound. | |
2951 | */ | |
6668958f | 2952 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
2953 | goto check_replay; |
2954 | ||
3a4f98bb | 2955 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2956 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2957 | " unconfirmed stateowner!\n"); |
2958 | return nfserr_bad_stateid; | |
1da177e4 | 2959 | } |
3a4f98bb | 2960 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2961 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2962 | " confirmed yet!\n"); |
2963 | return nfserr_bad_stateid; | |
1da177e4 | 2964 | } |
6668958f | 2965 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
2966 | if (status) |
2967 | return status; | |
52fd004e | 2968 | renew_client(sop->so_client); |
3a4f98bb | 2969 | return nfs_ok; |
1da177e4 | 2970 | |
1da177e4 | 2971 | check_replay: |
bd9aac52 | 2972 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2973 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2974 | /* indicate replay to calling function */ |
a90b061c | 2975 | return nfserr_replay_me; |
1da177e4 | 2976 | } |
2fdada03 | 2977 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2978 | sop->so_seqid, seqid); |
2979 | *sopp = NULL; | |
2980 | return nfserr_bad_seqid; | |
1da177e4 LT |
2981 | } |
2982 | ||
b37ad28b | 2983 | __be32 |
ca364317 | 2984 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2985 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2986 | { |
b37ad28b | 2987 | __be32 status; |
1da177e4 LT |
2988 | struct nfs4_stateowner *sop; |
2989 | struct nfs4_stateid *stp; | |
2990 | ||
2991 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2992 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2993 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2994 | |
ca364317 | 2995 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2996 | if (status) |
2997 | return status; | |
1da177e4 LT |
2998 | |
2999 | nfs4_lock_state(); | |
3000 | ||
dd453dfd | 3001 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3002 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3003 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3004 | &oc->oc_stateowner, &stp, NULL))) |
3005 | goto out; | |
3006 | ||
3007 | sop = oc->oc_stateowner; | |
3008 | sop->so_confirmed = 1; | |
3009 | update_stateid(&stp->st_stateid); | |
3010 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3011 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3012 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3013 | |
3014 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3015 | out: |
f2327d9a | 3016 | if (oc->oc_stateowner) { |
1da177e4 | 3017 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3018 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3019 | } |
1da177e4 LT |
3020 | nfs4_unlock_state(); |
3021 | return status; | |
3022 | } | |
3023 | ||
3024 | ||
3025 | /* | |
3026 | * unset all bits in union bitmap (bmap) that | |
3027 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3028 | */ | |
3029 | static void | |
3030 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3031 | { | |
3032 | int i; | |
3033 | for (i = 1; i < 4; i++) { | |
3034 | if ((i & access) != i) | |
3035 | __clear_bit(i, bmap); | |
3036 | } | |
3037 | } | |
3038 | ||
3039 | static void | |
3040 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3041 | { | |
3042 | int i; | |
3043 | for (i = 0; i < 4; i++) { | |
3044 | if ((i & deny) != i) | |
3045 | __clear_bit(i, bmap); | |
3046 | } | |
3047 | } | |
3048 | ||
b37ad28b | 3049 | __be32 |
ca364317 BF |
3050 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3051 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3052 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3053 | { |
b37ad28b | 3054 | __be32 status; |
1da177e4 LT |
3055 | struct nfs4_stateid *stp; |
3056 | unsigned int share_access; | |
3057 | ||
3058 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3059 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3060 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3061 | |
d87a8ade | 3062 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3063 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3064 | return nfserr_inval; |
3065 | ||
3066 | nfs4_lock_state(); | |
dd453dfd | 3067 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3068 | od->od_seqid, |
1da177e4 | 3069 | &od->od_stateid, |
f3362737 | 3070 | OPEN_STATE, |
1da177e4 LT |
3071 | &od->od_stateowner, &stp, NULL))) |
3072 | goto out; | |
3073 | ||
3074 | status = nfserr_inval; | |
3075 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3076 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3077 | stp->st_access_bmap, od->od_share_access); | |
3078 | goto out; | |
3079 | } | |
3080 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3081 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3082 | stp->st_deny_bmap, od->od_share_deny); | |
3083 | goto out; | |
3084 | } | |
3085 | set_access(&share_access, stp->st_access_bmap); | |
3086 | nfs4_file_downgrade(stp->st_vfs_file, | |
3087 | share_access & ~od->od_share_access); | |
3088 | ||
3089 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3090 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3091 | ||
3092 | update_stateid(&stp->st_stateid); | |
3093 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3094 | status = nfs_ok; | |
3095 | out: | |
f2327d9a | 3096 | if (od->od_stateowner) { |
1da177e4 | 3097 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3098 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3099 | } |
1da177e4 LT |
3100 | nfs4_unlock_state(); |
3101 | return status; | |
3102 | } | |
3103 | ||
3104 | /* | |
3105 | * nfs4_unlock_state() called after encode | |
3106 | */ | |
b37ad28b | 3107 | __be32 |
ca364317 | 3108 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3109 | struct nfsd4_close *close) |
1da177e4 | 3110 | { |
b37ad28b | 3111 | __be32 status; |
1da177e4 LT |
3112 | struct nfs4_stateid *stp; |
3113 | ||
3114 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3115 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3116 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3117 | |
3118 | nfs4_lock_state(); | |
3119 | /* check close_lru for replay */ | |
dd453dfd | 3120 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3121 | close->cl_seqid, |
1da177e4 | 3122 | &close->cl_stateid, |
f3362737 | 3123 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3124 | &close->cl_stateowner, &stp, NULL))) |
3125 | goto out; | |
1da177e4 LT |
3126 | status = nfs_ok; |
3127 | update_stateid(&stp->st_stateid); | |
3128 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3129 | ||
04ef5954 | 3130 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3131 | release_open_stateid(stp); |
04ef5954 BF |
3132 | |
3133 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3134 | * released by the laundromat service after the lease period | |
3135 | * to enable us to handle CLOSE replay | |
3136 | */ | |
3137 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3138 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3139 | out: |
f2327d9a | 3140 | if (close->cl_stateowner) { |
1da177e4 | 3141 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3142 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3143 | } |
1da177e4 LT |
3144 | nfs4_unlock_state(); |
3145 | return status; | |
3146 | } | |
3147 | ||
b37ad28b | 3148 | __be32 |
ca364317 BF |
3149 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3150 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3151 | { |
203a8c8e BF |
3152 | struct nfs4_delegation *dp; |
3153 | stateid_t *stateid = &dr->dr_stateid; | |
3154 | struct inode *inode; | |
b37ad28b | 3155 | __be32 status; |
6668958f | 3156 | int flags = 0; |
1da177e4 | 3157 | |
ca364317 | 3158 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3159 | return status; |
3160 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3161 | |
6668958f AA |
3162 | if (nfsd4_has_session(cstate)) |
3163 | flags |= HAS_SESSION; | |
1da177e4 | 3164 | nfs4_lock_state(); |
203a8c8e BF |
3165 | status = nfserr_bad_stateid; |
3166 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3167 | goto out; | |
3168 | status = nfserr_stale_stateid; | |
3169 | if (STALE_STATEID(stateid)) | |
3170 | goto out; | |
7e0f7cf5 | 3171 | status = nfserr_bad_stateid; |
203a8c8e BF |
3172 | if (!is_delegation_stateid(stateid)) |
3173 | goto out; | |
203a8c8e | 3174 | dp = find_delegation_stateid(inode, stateid); |
78155ed7 BN |
3175 | if (!dp) { |
3176 | status = stateid_error_map(stateid); | |
203a8c8e | 3177 | goto out; |
78155ed7 | 3178 | } |
6668958f | 3179 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3180 | if (status) |
3181 | goto out; | |
3182 | renew_client(dp->dl_client); | |
3183 | ||
3184 | unhash_delegation(dp); | |
1da177e4 | 3185 | out: |
203a8c8e BF |
3186 | nfs4_unlock_state(); |
3187 | ||
1da177e4 LT |
3188 | return status; |
3189 | } | |
3190 | ||
3191 | ||
3192 | /* | |
3193 | * Lock owner state (byte-range locks) | |
3194 | */ | |
3195 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3196 | #define LOCK_HASH_BITS 8 | |
3197 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3198 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3199 | ||
87df4de8 BH |
3200 | static inline u64 |
3201 | end_offset(u64 start, u64 len) | |
3202 | { | |
3203 | u64 end; | |
3204 | ||
3205 | end = start + len; | |
3206 | return end >= start ? end: NFS4_MAX_UINT64; | |
3207 | } | |
3208 | ||
3209 | /* last octet in a range */ | |
3210 | static inline u64 | |
3211 | last_byte_offset(u64 start, u64 len) | |
3212 | { | |
3213 | u64 end; | |
3214 | ||
3215 | BUG_ON(!len); | |
3216 | end = start + len; | |
3217 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3218 | } | |
3219 | ||
1da177e4 LT |
3220 | #define lockownerid_hashval(id) \ |
3221 | ((id) & LOCK_HASH_MASK) | |
3222 | ||
3223 | static inline unsigned int | |
3224 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3225 | struct xdr_netobj *ownername) | |
3226 | { | |
3227 | return (file_hashval(inode) + cl_id | |
3228 | + opaque_hashval(ownername->data, ownername->len)) | |
3229 | & LOCK_HASH_MASK; | |
3230 | } | |
3231 | ||
3232 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3233 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3234 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3235 | ||
fd39ca9a | 3236 | static struct nfs4_stateid * |
1da177e4 LT |
3237 | find_stateid(stateid_t *stid, int flags) |
3238 | { | |
9346eff0 | 3239 | struct nfs4_stateid *local; |
1da177e4 LT |
3240 | u32 st_id = stid->si_stateownerid; |
3241 | u32 f_id = stid->si_fileid; | |
3242 | unsigned int hashval; | |
3243 | ||
3244 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3245 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3246 | hashval = stateid_hashval(st_id, f_id); |
3247 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3248 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3249 | (local->st_stateid.si_fileid == f_id)) | |
3250 | return local; | |
3251 | } | |
3252 | } | |
9346eff0 KK |
3253 | |
3254 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3255 | hashval = stateid_hashval(st_id, f_id); |
3256 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3257 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3258 | (local->st_stateid.si_fileid == f_id)) | |
3259 | return local; | |
3260 | } | |
849823c5 | 3261 | } |
1da177e4 LT |
3262 | return NULL; |
3263 | } | |
3264 | ||
3265 | static struct nfs4_delegation * | |
3266 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3267 | { | |
13cd2184 N |
3268 | struct nfs4_file *fp; |
3269 | struct nfs4_delegation *dl; | |
1da177e4 | 3270 | |
8c10cbdb BH |
3271 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3272 | STATEID_VAL(stid)); | |
1da177e4 | 3273 | |
1da177e4 | 3274 | fp = find_file(ino); |
13cd2184 N |
3275 | if (!fp) |
3276 | return NULL; | |
3277 | dl = find_delegation_file(fp, stid); | |
3278 | put_nfs4_file(fp); | |
3279 | return dl; | |
1da177e4 LT |
3280 | } |
3281 | ||
3282 | /* | |
3283 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3284 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3285 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3286 | * locking, this prevents us from being completely protocol-compliant. The | |
3287 | * real solution to this problem is to start using unsigned file offsets in | |
3288 | * the VFS, but this is a very deep change! | |
3289 | */ | |
3290 | static inline void | |
3291 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3292 | { | |
3293 | if (lock->fl_start < 0) | |
3294 | lock->fl_start = OFFSET_MAX; | |
3295 | if (lock->fl_end < 0) | |
3296 | lock->fl_end = OFFSET_MAX; | |
3297 | } | |
3298 | ||
d5b9026a N |
3299 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3300 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3301 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3302 | }; |
1da177e4 LT |
3303 | |
3304 | static inline void | |
3305 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3306 | { | |
d5b9026a N |
3307 | struct nfs4_stateowner *sop; |
3308 | unsigned int hval; | |
1da177e4 | 3309 | |
d5b9026a N |
3310 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3311 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3312 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3313 | kref_get(&sop->so_ref); |
3314 | deny->ld_sop = sop; | |
3315 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3316 | } else { |
3317 | deny->ld_sop = NULL; | |
3318 | deny->ld_clientid.cl_boot = 0; | |
3319 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3320 | } |
3321 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3322 | deny->ld_length = NFS4_MAX_UINT64; |
3323 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3324 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3325 | deny->ld_type = NFS4_READ_LT; | |
3326 | if (fl->fl_type != F_RDLCK) | |
3327 | deny->ld_type = NFS4_WRITE_LT; | |
3328 | } | |
3329 | ||
1da177e4 LT |
3330 | static struct nfs4_stateowner * |
3331 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3332 | struct xdr_netobj *owner) | |
3333 | { | |
3334 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3335 | struct nfs4_stateowner *op; | |
3336 | ||
3337 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3338 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3339 | return op; |
3340 | } | |
3341 | return NULL; | |
3342 | } | |
3343 | ||
3344 | /* | |
3345 | * Alloc a lock owner structure. | |
3346 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3347 | * occured. | |
3348 | * | |
3349 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3350 | */ |
3351 | ||
3352 | static struct nfs4_stateowner * | |
3353 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3354 | struct nfs4_stateowner *sop; | |
3355 | struct nfs4_replay *rp; | |
3356 | unsigned int idhashval; | |
3357 | ||
3358 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3359 | return NULL; | |
3360 | idhashval = lockownerid_hashval(current_ownerid); | |
3361 | INIT_LIST_HEAD(&sop->so_idhash); | |
3362 | INIT_LIST_HEAD(&sop->so_strhash); | |
3363 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3364 | INIT_LIST_HEAD(&sop->so_stateids); |
3365 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3366 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3367 | sop->so_time = 0; | |
3368 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3369 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3370 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3371 | sop->so_is_open_owner = 0; |
3372 | sop->so_id = current_ownerid++; | |
3373 | sop->so_client = clp; | |
b59e3c0e NB |
3374 | /* It is the openowner seqid that will be incremented in encode in the |
3375 | * case of new lockowners; so increment the lock seqid manually: */ | |
3376 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3377 | sop->so_confirmed = 1; |
3378 | rp = &sop->so_replay; | |
de1ae286 | 3379 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3380 | rp->rp_buflen = 0; |
3381 | rp->rp_buf = rp->rp_ibuf; | |
3382 | return sop; | |
3383 | } | |
3384 | ||
fd39ca9a | 3385 | static struct nfs4_stateid * |
1da177e4 LT |
3386 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3387 | { | |
3388 | struct nfs4_stateid *stp; | |
3389 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3390 | ||
5ac049ac N |
3391 | stp = nfs4_alloc_stateid(); |
3392 | if (stp == NULL) | |
1da177e4 LT |
3393 | goto out; |
3394 | INIT_LIST_HEAD(&stp->st_hash); | |
3395 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3396 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3397 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3398 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3399 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3400 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3401 | stp->st_stateowner = sop; |
13cd2184 | 3402 | get_nfs4_file(fp); |
1da177e4 | 3403 | stp->st_file = fp; |
78155ed7 | 3404 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
3405 | stp->st_stateid.si_stateownerid = sop->so_id; |
3406 | stp->st_stateid.si_fileid = fp->fi_id; | |
3407 | stp->st_stateid.si_generation = 0; | |
3408 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3409 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3410 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3411 | stp->st_openstp = open_stp; |
1da177e4 LT |
3412 | |
3413 | out: | |
3414 | return stp; | |
3415 | } | |
3416 | ||
fd39ca9a | 3417 | static int |
1da177e4 LT |
3418 | check_lock_length(u64 offset, u64 length) |
3419 | { | |
87df4de8 | 3420 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3421 | LOFF_OVERFLOW(offset, length))); |
3422 | } | |
3423 | ||
3424 | /* | |
3425 | * LOCK operation | |
3426 | */ | |
b37ad28b | 3427 | __be32 |
ca364317 | 3428 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3429 | struct nfsd4_lock *lock) |
1da177e4 | 3430 | { |
3e9e3dbe | 3431 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3432 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3433 | struct nfs4_stateid *lock_stp; |
3434 | struct file *filp; | |
3435 | struct file_lock file_lock; | |
8dc7c311 | 3436 | struct file_lock conflock; |
b37ad28b | 3437 | __be32 status = 0; |
1da177e4 | 3438 | unsigned int strhashval; |
150b3934 | 3439 | unsigned int cmd; |
b8dd7b9a | 3440 | int err; |
1da177e4 LT |
3441 | |
3442 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3443 | (long long) lock->lk_offset, | |
3444 | (long long) lock->lk_length); | |
3445 | ||
1da177e4 LT |
3446 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3447 | return nfserr_inval; | |
3448 | ||
ca364317 | 3449 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3450 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3451 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3452 | return status; | |
3453 | } | |
3454 | ||
1da177e4 LT |
3455 | nfs4_lock_state(); |
3456 | ||
3457 | if (lock->lk_is_new) { | |
893f8770 N |
3458 | /* |
3459 | * Client indicates that this is a new lockowner. | |
3460 | * Use open owner and open stateid to create lock owner and | |
3461 | * lock stateid. | |
3462 | */ | |
1da177e4 LT |
3463 | struct nfs4_stateid *open_stp = NULL; |
3464 | struct nfs4_file *fp; | |
3465 | ||
3466 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3467 | if (!nfsd4_has_session(cstate) && |
3468 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3469 | goto out; |
1da177e4 | 3470 | |
1da177e4 | 3471 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3472 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3473 | lock->lk_new_open_seqid, |
3474 | &lock->lk_new_open_stateid, | |
f3362737 | 3475 | OPEN_STATE, |
3a65588a | 3476 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3477 | lock); |
37515177 | 3478 | if (status) |
1da177e4 | 3479 | goto out; |
3a65588a | 3480 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3481 | /* create lockowner and lock stateid */ |
3482 | fp = open_stp->st_file; | |
3483 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3484 | open_sop->so_client->cl_clientid.cl_id, | |
3485 | &lock->v.new.owner); | |
3e9e3dbe N |
3486 | /* XXX: Do we need to check for duplicate stateowners on |
3487 | * the same file, or should they just be allowed (and | |
3488 | * create new stateids)? */ | |
1da177e4 | 3489 | status = nfserr_resource; |
b59e3c0e NB |
3490 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3491 | open_sop->so_client, open_stp, lock); | |
3492 | if (lock_sop == NULL) | |
1da177e4 | 3493 | goto out; |
b59e3c0e | 3494 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3495 | if (lock_stp == NULL) |
1da177e4 | 3496 | goto out; |
1da177e4 LT |
3497 | } else { |
3498 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3499 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3500 | lock->lk_old_lock_seqid, |
3501 | &lock->lk_old_lock_stateid, | |
f3362737 | 3502 | LOCK_STATE, |
3a65588a | 3503 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3504 | if (status) |
3505 | goto out; | |
3a65588a | 3506 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3507 | } |
3a65588a | 3508 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3509 | filp = lock_stp->st_vfs_file; |
3510 | ||
0dd395dc | 3511 | status = nfserr_grace; |
af558e33 | 3512 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3513 | goto out; |
3514 | status = nfserr_no_grace; | |
af558e33 | 3515 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3516 | goto out; |
3517 | ||
1da177e4 LT |
3518 | locks_init_lock(&file_lock); |
3519 | switch (lock->lk_type) { | |
3520 | case NFS4_READ_LT: | |
3521 | case NFS4_READW_LT: | |
3522 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3523 | cmd = F_SETLK; |
1da177e4 LT |
3524 | break; |
3525 | case NFS4_WRITE_LT: | |
3526 | case NFS4_WRITEW_LT: | |
3527 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3528 | cmd = F_SETLK; |
1da177e4 LT |
3529 | break; |
3530 | default: | |
3531 | status = nfserr_inval; | |
3532 | goto out; | |
3533 | } | |
b59e3c0e | 3534 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3535 | file_lock.fl_pid = current->tgid; |
3536 | file_lock.fl_file = filp; | |
3537 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3538 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3539 | |
3540 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3541 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3542 | nfs4_transform_lock_offset(&file_lock); |
3543 | ||
3544 | /* | |
3545 | * Try to lock the file in the VFS. | |
3546 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3547 | */ | |
3548 | ||
fd85b817 | 3549 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3550 | switch (-err) { |
1da177e4 LT |
3551 | case 0: /* success! */ |
3552 | update_stateid(&lock_stp->st_stateid); | |
3553 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3554 | sizeof(stateid_t)); | |
b8dd7b9a | 3555 | status = 0; |
eb76b3fd AA |
3556 | break; |
3557 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3558 | status = nfserr_denied; | |
3559 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3560 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3561 | break; | |
1da177e4 LT |
3562 | case (EDEADLK): |
3563 | status = nfserr_deadlock; | |
eb76b3fd | 3564 | break; |
1da177e4 | 3565 | default: |
fd85b817 | 3566 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3567 | status = nfserr_resource; |
3568 | break; | |
1da177e4 | 3569 | } |
1da177e4 | 3570 | out: |
8a280510 | 3571 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3572 | release_lockowner(lock_sop); |
3a65588a BF |
3573 | if (lock->lk_replay_owner) { |
3574 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3575 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3576 | } |
1da177e4 LT |
3577 | nfs4_unlock_state(); |
3578 | return status; | |
3579 | } | |
3580 | ||
55ef1274 BF |
3581 | /* |
3582 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3583 | * so we do a temporary open here just to get an open file to pass to | |
3584 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3585 | * inode operation.) | |
3586 | */ | |
3587 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3588 | { | |
3589 | struct file *file; | |
3590 | int err; | |
3591 | ||
3592 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3593 | if (err) | |
3594 | return err; | |
3595 | err = vfs_test_lock(file, lock); | |
3596 | nfsd_close(file); | |
3597 | return err; | |
3598 | } | |
3599 | ||
1da177e4 LT |
3600 | /* |
3601 | * LOCKT operation | |
3602 | */ | |
b37ad28b | 3603 | __be32 |
ca364317 BF |
3604 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3605 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3606 | { |
3607 | struct inode *inode; | |
1da177e4 | 3608 | struct file_lock file_lock; |
fd85b817 | 3609 | int error; |
b37ad28b | 3610 | __be32 status; |
1da177e4 | 3611 | |
af558e33 | 3612 | if (locks_in_grace()) |
1da177e4 LT |
3613 | return nfserr_grace; |
3614 | ||
3615 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3616 | return nfserr_inval; | |
3617 | ||
3618 | lockt->lt_stateowner = NULL; | |
3619 | nfs4_lock_state(); | |
3620 | ||
3621 | status = nfserr_stale_clientid; | |
60adfc50 | 3622 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3623 | goto out; |
1da177e4 | 3624 | |
ca364317 | 3625 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3626 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3627 | if (status == nfserr_symlink) |
3628 | status = nfserr_inval; | |
3629 | goto out; | |
3630 | } | |
3631 | ||
ca364317 | 3632 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3633 | locks_init_lock(&file_lock); |
3634 | switch (lockt->lt_type) { | |
3635 | case NFS4_READ_LT: | |
3636 | case NFS4_READW_LT: | |
3637 | file_lock.fl_type = F_RDLCK; | |
3638 | break; | |
3639 | case NFS4_WRITE_LT: | |
3640 | case NFS4_WRITEW_LT: | |
3641 | file_lock.fl_type = F_WRLCK; | |
3642 | break; | |
3643 | default: | |
2fdada03 | 3644 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3645 | status = nfserr_inval; |
3646 | goto out; | |
3647 | } | |
3648 | ||
3649 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3650 | &lockt->lt_clientid, &lockt->lt_owner); | |
3651 | if (lockt->lt_stateowner) | |
3652 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3653 | file_lock.fl_pid = current->tgid; | |
3654 | file_lock.fl_flags = FL_POSIX; | |
3655 | ||
3656 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3657 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3658 | |
3659 | nfs4_transform_lock_offset(&file_lock); | |
3660 | ||
1da177e4 | 3661 | status = nfs_ok; |
55ef1274 | 3662 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3663 | if (error) { |
3664 | status = nfserrno(error); | |
3665 | goto out; | |
3666 | } | |
9d6a8c5c | 3667 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3668 | status = nfserr_denied; |
9d6a8c5c | 3669 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3670 | } |
3671 | out: | |
3672 | nfs4_unlock_state(); | |
3673 | return status; | |
3674 | } | |
3675 | ||
b37ad28b | 3676 | __be32 |
ca364317 | 3677 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3678 | struct nfsd4_locku *locku) |
1da177e4 LT |
3679 | { |
3680 | struct nfs4_stateid *stp; | |
3681 | struct file *filp = NULL; | |
3682 | struct file_lock file_lock; | |
b37ad28b | 3683 | __be32 status; |
b8dd7b9a | 3684 | int err; |
1da177e4 LT |
3685 | |
3686 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3687 | (long long) locku->lu_offset, | |
3688 | (long long) locku->lu_length); | |
3689 | ||
3690 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3691 | return nfserr_inval; | |
3692 | ||
3693 | nfs4_lock_state(); | |
3694 | ||
dd453dfd | 3695 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3696 | locku->lu_seqid, |
3697 | &locku->lu_stateid, | |
f3362737 | 3698 | LOCK_STATE, |
1da177e4 LT |
3699 | &locku->lu_stateowner, &stp, NULL))) |
3700 | goto out; | |
3701 | ||
3702 | filp = stp->st_vfs_file; | |
3703 | BUG_ON(!filp); | |
3704 | locks_init_lock(&file_lock); | |
3705 | file_lock.fl_type = F_UNLCK; | |
3706 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3707 | file_lock.fl_pid = current->tgid; | |
3708 | file_lock.fl_file = filp; | |
3709 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3710 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3711 | file_lock.fl_start = locku->lu_offset; |
3712 | ||
87df4de8 | 3713 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3714 | nfs4_transform_lock_offset(&file_lock); |
3715 | ||
3716 | /* | |
3717 | * Try to unlock the file in the VFS. | |
3718 | */ | |
fd85b817 | 3719 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3720 | if (err) { |
fd85b817 | 3721 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3722 | goto out_nfserr; |
3723 | } | |
3724 | /* | |
3725 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3726 | */ | |
3727 | update_stateid(&stp->st_stateid); | |
3728 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3729 | ||
3730 | out: | |
f2327d9a | 3731 | if (locku->lu_stateowner) { |
1da177e4 | 3732 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3733 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3734 | } |
1da177e4 LT |
3735 | nfs4_unlock_state(); |
3736 | return status; | |
3737 | ||
3738 | out_nfserr: | |
b8dd7b9a | 3739 | status = nfserrno(err); |
1da177e4 LT |
3740 | goto out; |
3741 | } | |
3742 | ||
3743 | /* | |
3744 | * returns | |
3745 | * 1: locks held by lockowner | |
3746 | * 0: no locks held by lockowner | |
3747 | */ | |
3748 | static int | |
3749 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3750 | { | |
3751 | struct file_lock **flpp; | |
7eaa36e2 | 3752 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3753 | int status = 0; |
3754 | ||
3755 | lock_kernel(); | |
3756 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3757 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3758 | status = 1; |
3759 | goto out; | |
796dadfd | 3760 | } |
1da177e4 LT |
3761 | } |
3762 | out: | |
3763 | unlock_kernel(); | |
3764 | return status; | |
3765 | } | |
3766 | ||
b37ad28b | 3767 | __be32 |
b591480b BF |
3768 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3769 | struct nfsd4_compound_state *cstate, | |
3770 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3771 | { |
3772 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3773 | struct nfs4_stateowner *sop; |
3774 | struct nfs4_stateid *stp; | |
1da177e4 | 3775 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3776 | struct list_head matches; |
3777 | int i; | |
b37ad28b | 3778 | __be32 status; |
1da177e4 LT |
3779 | |
3780 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3781 | clid->cl_boot, clid->cl_id); | |
3782 | ||
3783 | /* XXX check for lease expiration */ | |
3784 | ||
3785 | status = nfserr_stale_clientid; | |
849823c5 | 3786 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3787 | return status; |
1da177e4 LT |
3788 | |
3789 | nfs4_lock_state(); | |
3790 | ||
3e9e3dbe N |
3791 | status = nfserr_locks_held; |
3792 | /* XXX: we're doing a linear search through all the lockowners. | |
3793 | * Yipes! For now we'll just hope clients aren't really using | |
3794 | * release_lockowner much, but eventually we have to fix these | |
3795 | * data structures. */ | |
3796 | INIT_LIST_HEAD(&matches); | |
3797 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3798 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3799 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3800 | continue; |
3801 | list_for_each_entry(stp, &sop->so_stateids, | |
3802 | st_perstateowner) { | |
3803 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3804 | goto out; | |
3805 | /* Note: so_perclient unused for lockowners, | |
3806 | * so it's OK to fool with here. */ | |
3807 | list_add(&sop->so_perclient, &matches); | |
3808 | } | |
1da177e4 | 3809 | } |
3e9e3dbe N |
3810 | } |
3811 | /* Clients probably won't expect us to return with some (but not all) | |
3812 | * of the lockowner state released; so don't release any until all | |
3813 | * have been checked. */ | |
3814 | status = nfs_ok; | |
0fa822e4 N |
3815 | while (!list_empty(&matches)) { |
3816 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3817 | so_perclient); | |
3818 | /* unhash_stateowner deletes so_perclient only | |
3819 | * for openowners. */ | |
3820 | list_del(&sop->so_perclient); | |
f044ff83 | 3821 | release_lockowner(sop); |
1da177e4 LT |
3822 | } |
3823 | out: | |
3824 | nfs4_unlock_state(); | |
3825 | return status; | |
3826 | } | |
3827 | ||
3828 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3829 | alloc_reclaim(void) |
1da177e4 | 3830 | { |
a55370a3 | 3831 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3832 | } |
3833 | ||
c7b9a459 | 3834 | int |
a1bcecd2 | 3835 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3836 | { |
3837 | unsigned int strhashval = clientstr_hashval(name); | |
3838 | struct nfs4_client *clp; | |
3839 | ||
a1bcecd2 | 3840 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3841 | return clp ? 1 : 0; |
3842 | } | |
3843 | ||
1da177e4 LT |
3844 | /* |
3845 | * failure => all reset bets are off, nfserr_no_grace... | |
3846 | */ | |
190e4fbf N |
3847 | int |
3848 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3849 | { |
3850 | unsigned int strhashval; | |
3851 | struct nfs4_client_reclaim *crp = NULL; | |
3852 | ||
a55370a3 N |
3853 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3854 | crp = alloc_reclaim(); | |
1da177e4 LT |
3855 | if (!crp) |
3856 | return 0; | |
a55370a3 | 3857 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3858 | INIT_LIST_HEAD(&crp->cr_strhash); |
3859 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3860 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3861 | reclaim_str_hashtbl_size++; |
3862 | return 1; | |
3863 | } | |
3864 | ||
3865 | static void | |
3866 | nfs4_release_reclaim(void) | |
3867 | { | |
3868 | struct nfs4_client_reclaim *crp = NULL; | |
3869 | int i; | |
3870 | ||
1da177e4 LT |
3871 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3872 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3873 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3874 | struct nfs4_client_reclaim, cr_strhash); | |
3875 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3876 | kfree(crp); |
3877 | reclaim_str_hashtbl_size--; | |
3878 | } | |
3879 | } | |
3880 | BUG_ON(reclaim_str_hashtbl_size); | |
3881 | } | |
3882 | ||
3883 | /* | |
3884 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3885 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3886 | nfs4_find_reclaim_client(clientid_t *clid) |
3887 | { | |
3888 | unsigned int strhashval; | |
3889 | struct nfs4_client *clp; | |
3890 | struct nfs4_client_reclaim *crp = NULL; | |
3891 | ||
3892 | ||
3893 | /* find clientid in conf_id_hashtbl */ | |
3894 | clp = find_confirmed_client(clid); | |
3895 | if (clp == NULL) | |
3896 | return NULL; | |
3897 | ||
a55370a3 N |
3898 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3899 | clp->cl_name.len, clp->cl_name.data, | |
3900 | clp->cl_recdir); | |
1da177e4 LT |
3901 | |
3902 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3903 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3904 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3905 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3906 | return crp; |
3907 | } | |
3908 | } | |
3909 | return NULL; | |
3910 | } | |
3911 | ||
3912 | /* | |
3913 | * Called from OPEN. Look for clientid in reclaim list. | |
3914 | */ | |
b37ad28b | 3915 | __be32 |
1da177e4 LT |
3916 | nfs4_check_open_reclaim(clientid_t *clid) |
3917 | { | |
dfc83565 | 3918 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3919 | } |
3920 | ||
ac4d8ff2 | 3921 | /* initialization to perform at module load time: */ |
1da177e4 | 3922 | |
e8ff2a84 | 3923 | int |
ac4d8ff2 | 3924 | nfs4_state_init(void) |
1da177e4 | 3925 | { |
e8ff2a84 | 3926 | int i, status; |
1da177e4 | 3927 | |
e8ff2a84 BF |
3928 | status = nfsd4_init_slabs(); |
3929 | if (status) | |
3930 | return status; | |
1da177e4 LT |
3931 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3932 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3933 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3934 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3935 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3936 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3937 | } |
5282fd72 ME |
3938 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3939 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3940 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3941 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3942 | } | |
3943 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3944 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3945 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3946 | } | |
3947 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3948 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3949 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3950 | } | |
3951 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3952 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3953 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3954 | } | |
1da177e4 | 3955 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3956 | INIT_LIST_HEAD(&close_lru); |
3957 | INIT_LIST_HEAD(&client_lru); | |
3958 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 3959 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 3960 | return 0; |
ac4d8ff2 N |
3961 | } |
3962 | ||
190e4fbf N |
3963 | static void |
3964 | nfsd4_load_reboot_recovery_data(void) | |
3965 | { | |
3966 | int status; | |
3967 | ||
0964a3d3 N |
3968 | nfs4_lock_state(); |
3969 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3970 | status = nfsd4_recdir_load(); |
0964a3d3 | 3971 | nfs4_unlock_state(); |
190e4fbf N |
3972 | if (status) |
3973 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3974 | } | |
3975 | ||
9a8db97e ME |
3976 | unsigned long |
3977 | get_nfs4_grace_period(void) | |
3978 | { | |
3979 | return max(user_lease_time, lease_time) * HZ; | |
3980 | } | |
3981 | ||
c2f1a551 MS |
3982 | /* |
3983 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3984 | * client may quite reasonably hang on to a delegation as long as it has | |
3985 | * the inode cached. This becomes an obvious problem the first time a | |
3986 | * client's inode cache approaches the size of the server's total memory. | |
3987 | * | |
3988 | * For now we avoid this problem by imposing a hard limit on the number | |
3989 | * of delegations, which varies according to the server's memory size. | |
3990 | */ | |
3991 | static void | |
3992 | set_max_delegations(void) | |
3993 | { | |
3994 | /* | |
3995 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3996 | * estimates suggest that in the worst case (where every delegation | |
3997 | * is for a different inode), a delegation could take about 1.5K, | |
3998 | * giving a worst case usage of about 6% of memory. | |
3999 | */ | |
4000 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4001 | } | |
4002 | ||
ac4d8ff2 N |
4003 | /* initialization to perform when the nfsd service is started: */ |
4004 | ||
29ab23cc | 4005 | static int |
ac4d8ff2 N |
4006 | __nfs4_state_start(void) |
4007 | { | |
9a8db97e | 4008 | unsigned long grace_time; |
ac4d8ff2 | 4009 | |
1da177e4 | 4010 | boot_time = get_seconds(); |
af558e33 | 4011 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 4012 | lease_time = user_lease_time; |
af558e33 | 4013 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
4014 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
4015 | grace_time/HZ); | |
58da282b | 4016 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4017 | if (laundry_wq == NULL) |
4018 | return -ENOMEM; | |
9a8db97e | 4019 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 4020 | set_max_delegations(); |
80fc015b | 4021 | return set_callback_cred(); |
1da177e4 LT |
4022 | } |
4023 | ||
29ab23cc | 4024 | int |
76a3550e | 4025 | nfs4_state_start(void) |
1da177e4 | 4026 | { |
29ab23cc BF |
4027 | int ret; |
4028 | ||
1da177e4 | 4029 | if (nfs4_init) |
29ab23cc | 4030 | return 0; |
190e4fbf | 4031 | nfsd4_load_reboot_recovery_data(); |
29ab23cc BF |
4032 | ret = __nfs4_state_start(); |
4033 | if (ret) | |
4034 | return ret; | |
1da177e4 | 4035 | nfs4_init = 1; |
29ab23cc | 4036 | return 0; |
1da177e4 LT |
4037 | } |
4038 | ||
1da177e4 LT |
4039 | time_t |
4040 | nfs4_lease_time(void) | |
4041 | { | |
4042 | return lease_time; | |
4043 | } | |
4044 | ||
4045 | static void | |
4046 | __nfs4_state_shutdown(void) | |
4047 | { | |
4048 | int i; | |
4049 | struct nfs4_client *clp = NULL; | |
4050 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4051 | struct list_head *pos, *next, reaplist; |
4052 | ||
1da177e4 LT |
4053 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4054 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4055 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4056 | expire_client(clp); | |
4057 | } | |
4058 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4059 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4060 | expire_client(clp); | |
4061 | } | |
4062 | } | |
4063 | INIT_LIST_HEAD(&reaplist); | |
4064 | spin_lock(&recall_lock); | |
4065 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4066 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4067 | list_move(&dp->dl_recall_lru, &reaplist); | |
4068 | } | |
4069 | spin_unlock(&recall_lock); | |
4070 | list_for_each_safe(pos, next, &reaplist) { | |
4071 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4072 | list_del_init(&dp->dl_recall_lru); | |
4073 | unhash_delegation(dp); | |
4074 | } | |
4075 | ||
190e4fbf | 4076 | nfsd4_shutdown_recdir(); |
1da177e4 | 4077 | nfs4_init = 0; |
1da177e4 LT |
4078 | } |
4079 | ||
4080 | void | |
4081 | nfs4_state_shutdown(void) | |
4082 | { | |
5e8d5c29 N |
4083 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4084 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4085 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4086 | nfs4_lock_state(); |
4087 | nfs4_release_reclaim(); | |
4088 | __nfs4_state_shutdown(); | |
1da177e4 LT |
4089 | nfs4_unlock_state(); |
4090 | } | |
4091 | ||
3dd98a3b JL |
4092 | /* |
4093 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4094 | * accessed when nfsd is starting. | |
4095 | */ | |
0964a3d3 N |
4096 | static void |
4097 | nfs4_set_recdir(char *recdir) | |
4098 | { | |
0964a3d3 | 4099 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4100 | } |
4101 | ||
4102 | /* | |
4103 | * Change the NFSv4 recovery directory to recdir. | |
4104 | */ | |
4105 | int | |
4106 | nfs4_reset_recoverydir(char *recdir) | |
4107 | { | |
4108 | int status; | |
a63bb996 | 4109 | struct path path; |
0964a3d3 | 4110 | |
a63bb996 | 4111 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4112 | if (status) |
4113 | return status; | |
4114 | status = -ENOTDIR; | |
a63bb996 | 4115 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4116 | nfs4_set_recdir(recdir); |
4117 | status = 0; | |
4118 | } | |
a63bb996 | 4119 | path_put(&path); |
0964a3d3 N |
4120 | return status; |
4121 | } | |
4122 | ||
3dd98a3b JL |
4123 | char * |
4124 | nfs4_recoverydir(void) | |
4125 | { | |
4126 | return user_recovery_dirname; | |
4127 | } | |
4128 | ||
1da177e4 LT |
4129 | /* |
4130 | * Called when leasetime is changed. | |
4131 | * | |
d99a05ad N |
4132 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
4133 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
4134 | * we start to register any changes in lease time. If the administrator | |
4135 | * really wants to change the lease time *now*, they can go ahead and bring | |
4136 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
4137 | * |
4138 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
4139 | * when nfsd is starting | |
1da177e4 LT |
4140 | */ |
4141 | void | |
4142 | nfs4_reset_lease(time_t leasetime) | |
4143 | { | |
d99a05ad | 4144 | user_lease_time = leasetime; |
1da177e4 | 4145 | } |