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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
1da177e4 | 36 | #include <linux/smp_lock.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
68e76ad0 | 40 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 41 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 42 | #include "xdr4.h" |
0a3adade | 43 | #include "vfs.h" |
1da177e4 LT |
44 | |
45 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
46 | ||
47 | /* Globals */ | |
cf07d2ea | 48 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 49 | time_t nfsd4_grace = 90; |
fd39ca9a | 50 | static time_t boot_time; |
1da177e4 LT |
51 | static u32 current_ownerid = 1; |
52 | static u32 current_fileid = 1; | |
53 | static u32 current_delegid = 1; | |
54 | static u32 nfs4_init; | |
fd39ca9a N |
55 | static stateid_t zerostateid; /* bits all 0 */ |
56 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 57 | static u64 current_sessionid = 1; |
fd39ca9a N |
58 | |
59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 61 | |
1da177e4 | 62 | /* forward declarations */ |
fd39ca9a | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 64 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
65 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
66 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* Locking: */ |
69 | ||
70 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 71 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* |
74 | * Currently used for the del_recall_lru and file hash table. In an | |
75 | * effort to decrease the scope of the client_mutex, this spinlock may | |
76 | * eventually cover more: | |
77 | */ | |
78 | static DEFINE_SPINLOCK(recall_lock); | |
79 | ||
e18b890b CL |
80 | static struct kmem_cache *stateowner_slab = NULL; |
81 | static struct kmem_cache *file_slab = NULL; | |
82 | static struct kmem_cache *stateid_slab = NULL; | |
83 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 84 | |
1da177e4 LT |
85 | void |
86 | nfs4_lock_state(void) | |
87 | { | |
353ab6e9 | 88 | mutex_lock(&client_mutex); |
1da177e4 LT |
89 | } |
90 | ||
91 | void | |
92 | nfs4_unlock_state(void) | |
93 | { | |
353ab6e9 | 94 | mutex_unlock(&client_mutex); |
1da177e4 LT |
95 | } |
96 | ||
97 | static inline u32 | |
98 | opaque_hashval(const void *ptr, int nbytes) | |
99 | { | |
100 | unsigned char *cptr = (unsigned char *) ptr; | |
101 | ||
102 | u32 x = 0; | |
103 | while (nbytes--) { | |
104 | x *= 37; | |
105 | x += *cptr++; | |
106 | } | |
107 | return x; | |
108 | } | |
109 | ||
1da177e4 LT |
110 | static struct list_head del_recall_lru; |
111 | ||
13cd2184 N |
112 | static inline void |
113 | put_nfs4_file(struct nfs4_file *fi) | |
114 | { | |
8b671b80 BF |
115 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
116 | list_del(&fi->fi_hash); | |
117 | spin_unlock(&recall_lock); | |
118 | iput(fi->fi_inode); | |
119 | kmem_cache_free(file_slab, fi); | |
120 | } | |
13cd2184 N |
121 | } |
122 | ||
123 | static inline void | |
124 | get_nfs4_file(struct nfs4_file *fi) | |
125 | { | |
8b671b80 | 126 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
127 | } |
128 | ||
ef0f3390 | 129 | static int num_delegations; |
c2f1a551 | 130 | unsigned int max_delegations; |
ef0f3390 N |
131 | |
132 | /* | |
133 | * Open owner state (share locks) | |
134 | */ | |
135 | ||
136 | /* hash tables for nfs4_stateowner */ | |
137 | #define OWNER_HASH_BITS 8 | |
138 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
139 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
140 | ||
141 | #define ownerid_hashval(id) \ | |
142 | ((id) & OWNER_HASH_MASK) | |
143 | #define ownerstr_hashval(clientid, ownername) \ | |
144 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
145 | ||
146 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
147 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
148 | ||
149 | /* hash table for nfs4_file */ | |
150 | #define FILE_HASH_BITS 8 | |
151 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
152 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
153 | /* hash table for (open)nfs4_stateid */ | |
154 | #define STATEID_HASH_BITS 10 | |
155 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
156 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
157 | ||
158 | #define file_hashval(x) \ | |
159 | hash_ptr(x, FILE_HASH_BITS) | |
160 | #define stateid_hashval(owner_id, file_id) \ | |
161 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
162 | ||
163 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
164 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
165 | ||
1da177e4 LT |
166 | static struct nfs4_delegation * |
167 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
168 | { | |
169 | struct nfs4_delegation *dp; | |
170 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 171 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
172 | |
173 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
174 | if (fp->fi_had_conflict) |
175 | return NULL; | |
c2f1a551 | 176 | if (num_delegations > max_delegations) |
ef0f3390 | 177 | return NULL; |
5b2d21c1 N |
178 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
179 | if (dp == NULL) | |
1da177e4 | 180 | return dp; |
ef0f3390 | 181 | num_delegations++; |
ea1da636 N |
182 | INIT_LIST_HEAD(&dp->dl_perfile); |
183 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
184 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
185 | dp->dl_client = clp; | |
13cd2184 | 186 | get_nfs4_file(fp); |
1da177e4 LT |
187 | dp->dl_file = fp; |
188 | dp->dl_flock = NULL; | |
189 | get_file(stp->st_vfs_file); | |
190 | dp->dl_vfs_file = stp->st_vfs_file; | |
191 | dp->dl_type = type; | |
b53d40c5 | 192 | dp->dl_ident = cb->cb_ident; |
e4e83ea4 | 193 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
194 | dp->dl_stateid.si_stateownerid = current_delegid++; |
195 | dp->dl_stateid.si_fileid = 0; | |
196 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 197 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
198 | dp->dl_time = 0; |
199 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
200 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
201 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
b5a1a81e | 202 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
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 | ||
36acb66b | 253 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
254 | static DEFINE_SPINLOCK(client_lock); |
255 | ||
1da177e4 LT |
256 | /* Hash tables for nfs4_clientid state */ |
257 | #define CLIENT_HASH_BITS 4 | |
258 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
259 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
260 | ||
261 | #define clientid_hashval(id) \ | |
262 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
263 | #define clientstr_hashval(name) \ |
264 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
265 | /* |
266 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
267 | * used in reboot/reset lease grace period processing | |
268 | * | |
269 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
270 | * setclientid_confirmed info. | |
271 | * | |
272 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
273 | * setclientid info. | |
274 | * | |
275 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
276 | * for lease renewal. | |
277 | * | |
278 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
279 | * for last close replay. | |
280 | */ | |
281 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
282 | static int reclaim_str_hashtbl_size = 0; | |
283 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
284 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
285 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
286 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
287 | static struct list_head client_lru; | |
288 | static struct list_head close_lru; | |
289 | ||
2283963f BF |
290 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
291 | { | |
292 | list_del(&stp->st_hash); | |
293 | list_del(&stp->st_perfile); | |
294 | list_del(&stp->st_perstateowner); | |
295 | } | |
296 | ||
297 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
298 | { | |
299 | put_nfs4_file(stp->st_file); | |
300 | kmem_cache_free(stateid_slab, stp); | |
301 | } | |
302 | ||
303 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
304 | { | |
305 | unhash_generic_stateid(stp); | |
306 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
307 | free_generic_stateid(stp); | |
308 | } | |
309 | ||
f044ff83 BF |
310 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
311 | { | |
312 | struct nfs4_stateid *stp; | |
313 | ||
314 | list_del(&sop->so_idhash); | |
315 | list_del(&sop->so_strhash); | |
316 | list_del(&sop->so_perstateid); | |
317 | while (!list_empty(&sop->so_stateids)) { | |
318 | stp = list_first_entry(&sop->so_stateids, | |
319 | struct nfs4_stateid, st_perstateowner); | |
320 | release_lock_stateid(stp); | |
321 | } | |
322 | } | |
323 | ||
324 | static void release_lockowner(struct nfs4_stateowner *sop) | |
325 | { | |
326 | unhash_lockowner(sop); | |
327 | nfs4_put_stateowner(sop); | |
328 | } | |
329 | ||
f1d110ca BF |
330 | static void |
331 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
332 | { | |
333 | struct nfs4_stateowner *lock_sop; | |
334 | ||
335 | while (!list_empty(&open_stp->st_lockowners)) { | |
336 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
337 | struct nfs4_stateowner, so_perstateid); | |
338 | /* list_del(&open_stp->st_lockowners); */ | |
339 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 340 | release_lockowner(lock_sop); |
f1d110ca BF |
341 | } |
342 | } | |
343 | ||
2283963f BF |
344 | static void release_open_stateid(struct nfs4_stateid *stp) |
345 | { | |
346 | unhash_generic_stateid(stp); | |
347 | release_stateid_lockowners(stp); | |
348 | nfsd_close(stp->st_vfs_file); | |
349 | free_generic_stateid(stp); | |
350 | } | |
351 | ||
f044ff83 | 352 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
353 | { |
354 | struct nfs4_stateid *stp; | |
355 | ||
356 | list_del(&sop->so_idhash); | |
357 | list_del(&sop->so_strhash); | |
f044ff83 BF |
358 | list_del(&sop->so_perclient); |
359 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 360 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
361 | stp = list_first_entry(&sop->so_stateids, |
362 | struct nfs4_stateid, st_perstateowner); | |
363 | release_open_stateid(stp); | |
f1d110ca BF |
364 | } |
365 | } | |
366 | ||
f044ff83 | 367 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 368 | { |
f044ff83 | 369 | unhash_openowner(sop); |
f1d110ca BF |
370 | list_del(&sop->so_close_lru); |
371 | nfs4_put_stateowner(sop); | |
372 | } | |
373 | ||
5282fd72 ME |
374 | #define SESSION_HASH_SIZE 512 |
375 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
376 | ||
377 | static inline int | |
378 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
379 | { | |
380 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
381 | ||
382 | return sid->sequence % SESSION_HASH_SIZE; | |
383 | } | |
384 | ||
385 | static inline void | |
386 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
387 | { | |
388 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
389 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
390 | } | |
391 | ||
ec6b5d7b AA |
392 | static void |
393 | gen_sessionid(struct nfsd4_session *ses) | |
394 | { | |
395 | struct nfs4_client *clp = ses->se_client; | |
396 | struct nfsd4_sessionid *sid; | |
397 | ||
398 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
399 | sid->clientid = clp->cl_clientid; | |
400 | sid->sequence = current_sessionid++; | |
401 | sid->reserved = 0; | |
402 | } | |
403 | ||
404 | /* | |
a649637c AA |
405 | * The protocol defines ca_maxresponssize_cached to include the size of |
406 | * the rpc header, but all we need to cache is the data starting after | |
407 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
408 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
409 | * value that is the number of bytes in our cache plus a few additional | |
410 | * bytes. In order to stay on the safe side, and not promise more than | |
411 | * we can cache, those additional bytes must be the minimum possible: 24 | |
412 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
413 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
414 | * for the SEQUENCE op response: | |
415 | */ | |
416 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
417 | ||
418 | /* | |
419 | * Give the client the number of ca_maxresponsesize_cached slots it | |
420 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
421 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
422 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 423 | * |
a649637c AA |
424 | * If we run out of reserved DRC memory we should (up to a point) |
425 | * re-negotiate active sessions and reduce their slot usage to make | |
426 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 427 | */ |
a649637c | 428 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 429 | { |
a649637c | 430 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 431 | |
5d77ddfb AA |
432 | if (fchan->maxreqs < 1) |
433 | return nfserr_inval; | |
5d77ddfb | 434 | |
a649637c AA |
435 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
436 | size = NFSD_MIN_HDR_SEQ_SZ; | |
437 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
438 | if (size > NFSD_SLOT_CACHE_SIZE) | |
439 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 440 | |
a649637c AA |
441 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
442 | mem = fchan->maxreqs * size; | |
443 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
444 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
445 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
446 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
447 | mem = fchan->maxreqs * size; | |
448 | } | |
ec6b5d7b | 449 | |
4bd9b0f4 | 450 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
451 | /* bound the total session drc memory ussage */ |
452 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
453 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
454 | mem = fchan->maxreqs * size; | |
455 | } | |
0c193054 | 456 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 457 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 458 | |
b101ebbc | 459 | if (fchan->maxreqs == 0) |
bdac86e2 | 460 | return nfserr_serverfault; |
a649637c AA |
461 | |
462 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 463 | return 0; |
ec6b5d7b AA |
464 | } |
465 | ||
466 | /* | |
467 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 468 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
469 | */ |
470 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
471 | struct nfsd4_channel_attrs *session_fchan, |
472 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
473 | { |
474 | int status = 0; | |
ddc04fd4 | 475 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
476 | |
477 | /* headerpadsz set to zero in encode routine */ | |
478 | ||
479 | /* Use the client's max request and max response size if possible */ | |
480 | if (fchan->maxreq_sz > maxcount) | |
481 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 482 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
483 | |
484 | if (fchan->maxresp_sz > maxcount) | |
485 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 486 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 487 | |
ec6b5d7b AA |
488 | /* Use the client's maxops if possible */ |
489 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
490 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 491 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 492 | |
ec6b5d7b AA |
493 | /* FIXME: Error means no more DRC pages so the server should |
494 | * recover pages from existing sessions. For now fail session | |
495 | * creation. | |
496 | */ | |
a649637c | 497 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 498 | |
a649637c | 499 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 500 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
501 | |
502 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
503 | return status; |
504 | } | |
505 | ||
557ce264 AA |
506 | static void |
507 | free_session_slots(struct nfsd4_session *ses) | |
508 | { | |
509 | int i; | |
510 | ||
511 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
512 | kfree(ses->se_slots[i]); | |
513 | } | |
514 | ||
efe0cb6d BF |
515 | /* |
516 | * We don't actually need to cache the rpc and session headers, so we | |
517 | * can allocate a little less for each slot: | |
518 | */ | |
519 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
520 | { | |
521 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
522 | } | |
523 | ||
ec6b5d7b AA |
524 | static int |
525 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
526 | struct nfsd4_create_session *cses) | |
527 | { | |
528 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
529 | struct nfsd4_slot *sp; |
530 | int idx, slotsize, cachesize, i; | |
531 | int status; | |
ec6b5d7b AA |
532 | |
533 | memset(&tmp, 0, sizeof(tmp)); | |
534 | ||
535 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
536 | tmp.se_bchannel = cses->back_channel; |
537 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
538 | &cses->fore_channel); | |
ec6b5d7b AA |
539 | if (status) |
540 | goto out; | |
541 | ||
557ce264 AA |
542 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
543 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
544 | ||
545 | status = nfserr_serverfault; | |
546 | /* allocate struct nfsd4_session and slot table pointers in one piece */ | |
547 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
548 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
549 | if (!new) | |
550 | goto out; | |
551 | ||
552 | memcpy(new, &tmp, sizeof(*new)); | |
553 | ||
557ce264 | 554 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 555 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
556 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
557 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
558 | if (!sp) | |
559 | goto out_free; | |
560 | new->se_slots[i] = sp; | |
561 | } | |
562 | ||
ec6b5d7b AA |
563 | new->se_client = clp; |
564 | gen_sessionid(new); | |
565 | idx = hash_sessionid(&new->se_sessionid); | |
566 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
567 | NFS4_MAX_SESSIONID_LEN); | |
568 | ||
569 | new->se_flags = cses->flags; | |
570 | kref_init(&new->se_ref); | |
9089f1b4 | 571 | spin_lock(&client_lock); |
ec6b5d7b AA |
572 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
573 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
9089f1b4 | 574 | spin_unlock(&client_lock); |
ec6b5d7b AA |
575 | |
576 | status = nfs_ok; | |
577 | out: | |
578 | return status; | |
557ce264 AA |
579 | out_free: |
580 | free_session_slots(new); | |
581 | kfree(new); | |
582 | goto out; | |
ec6b5d7b AA |
583 | } |
584 | ||
9089f1b4 | 585 | /* caller must hold client_lock */ |
5282fd72 ME |
586 | static struct nfsd4_session * |
587 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
588 | { | |
589 | struct nfsd4_session *elem; | |
590 | int idx; | |
591 | ||
592 | dump_sessionid(__func__, sessionid); | |
593 | idx = hash_sessionid(sessionid); | |
594 | dprintk("%s: idx is %d\n", __func__, idx); | |
595 | /* Search in the appropriate list */ | |
596 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
597 | dump_sessionid("list traversal", &elem->se_sessionid); | |
598 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
599 | NFS4_MAX_SESSIONID_LEN)) { | |
600 | return elem; | |
601 | } | |
602 | } | |
603 | ||
604 | dprintk("%s: session not found\n", __func__); | |
605 | return NULL; | |
606 | } | |
607 | ||
9089f1b4 | 608 | /* caller must hold client_lock */ |
7116ed6b | 609 | static void |
5282fd72 | 610 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
611 | { |
612 | list_del(&ses->se_hash); | |
613 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
614 | } |
615 | ||
7116ed6b AA |
616 | void |
617 | free_session(struct kref *kref) | |
618 | { | |
619 | struct nfsd4_session *ses; | |
dd829c45 | 620 | int mem; |
7116ed6b AA |
621 | |
622 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 623 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 624 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 625 | nfsd_drc_mem_used -= mem; |
be98d1bb | 626 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 627 | free_session_slots(ses); |
7116ed6b AA |
628 | kfree(ses); |
629 | } | |
630 | ||
36acb66b | 631 | /* must be called under the client_lock */ |
1da177e4 | 632 | static inline void |
36acb66b | 633 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 634 | { |
07cd4909 BH |
635 | if (is_client_expired(clp)) { |
636 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
637 | __func__, | |
638 | clp->cl_clientid.cl_boot, | |
639 | clp->cl_clientid.cl_id); | |
640 | return; | |
641 | } | |
642 | ||
1da177e4 LT |
643 | /* |
644 | * Move client to the end to the LRU list. | |
645 | */ | |
646 | dprintk("renewing client (clientid %08x/%08x)\n", | |
647 | clp->cl_clientid.cl_boot, | |
648 | clp->cl_clientid.cl_id); | |
649 | list_move_tail(&clp->cl_lru, &client_lru); | |
650 | clp->cl_time = get_seconds(); | |
651 | } | |
652 | ||
36acb66b BH |
653 | static inline void |
654 | renew_client(struct nfs4_client *clp) | |
655 | { | |
656 | spin_lock(&client_lock); | |
657 | renew_client_locked(clp); | |
658 | spin_unlock(&client_lock); | |
659 | } | |
660 | ||
1da177e4 LT |
661 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
662 | static int | |
663 | STALE_CLIENTID(clientid_t *clid) | |
664 | { | |
665 | if (clid->cl_boot == boot_time) | |
666 | return 0; | |
60adfc50 AA |
667 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
668 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
669 | return 1; |
670 | } | |
671 | ||
672 | /* | |
673 | * XXX Should we use a slab cache ? | |
674 | * This type of memory management is somewhat inefficient, but we use it | |
675 | * anyway since SETCLIENTID is not a common operation. | |
676 | */ | |
35bba9a3 | 677 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
678 | { |
679 | struct nfs4_client *clp; | |
680 | ||
35bba9a3 BF |
681 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
682 | if (clp == NULL) | |
683 | return NULL; | |
684 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
685 | if (clp->cl_name.data == NULL) { | |
686 | kfree(clp); | |
687 | return NULL; | |
1da177e4 | 688 | } |
35bba9a3 BF |
689 | memcpy(clp->cl_name.data, name.data, name.len); |
690 | clp->cl_name.len = name.len; | |
1da177e4 LT |
691 | return clp; |
692 | } | |
693 | ||
694 | static inline void | |
695 | free_client(struct nfs4_client *clp) | |
696 | { | |
697 | if (clp->cl_cred.cr_group_info) | |
698 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 699 | kfree(clp->cl_principal); |
1da177e4 LT |
700 | kfree(clp->cl_name.data); |
701 | kfree(clp); | |
702 | } | |
703 | ||
d7682988 BH |
704 | void |
705 | release_session_client(struct nfsd4_session *session) | |
706 | { | |
707 | struct nfs4_client *clp = session->se_client; | |
708 | ||
709 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
710 | return; | |
711 | if (is_client_expired(clp)) { | |
712 | free_client(clp); | |
713 | session->se_client = NULL; | |
714 | } else | |
715 | renew_client_locked(clp); | |
716 | spin_unlock(&client_lock); | |
717 | nfsd4_put_session(session); | |
718 | } | |
719 | ||
84d38ac9 BH |
720 | /* must be called under the client_lock */ |
721 | static inline void | |
722 | unhash_client_locked(struct nfs4_client *clp) | |
723 | { | |
07cd4909 | 724 | mark_client_expired(clp); |
84d38ac9 BH |
725 | list_del(&clp->cl_lru); |
726 | while (!list_empty(&clp->cl_sessions)) { | |
727 | struct nfsd4_session *ses; | |
728 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
729 | se_perclnt); | |
730 | unhash_session(ses); | |
731 | nfsd4_put_session(ses); | |
732 | } | |
733 | } | |
734 | ||
1da177e4 LT |
735 | static void |
736 | expire_client(struct nfs4_client *clp) | |
737 | { | |
738 | struct nfs4_stateowner *sop; | |
739 | struct nfs4_delegation *dp; | |
1da177e4 LT |
740 | struct list_head reaplist; |
741 | ||
1da177e4 LT |
742 | INIT_LIST_HEAD(&reaplist); |
743 | spin_lock(&recall_lock); | |
ea1da636 N |
744 | while (!list_empty(&clp->cl_delegations)) { |
745 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
746 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
747 | dp->dl_flock); | |
ea1da636 | 748 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
749 | list_move(&dp->dl_recall_lru, &reaplist); |
750 | } | |
751 | spin_unlock(&recall_lock); | |
752 | while (!list_empty(&reaplist)) { | |
753 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
754 | list_del_init(&dp->dl_recall_lru); | |
755 | unhash_delegation(dp); | |
756 | } | |
ea1da636 N |
757 | while (!list_empty(&clp->cl_openowners)) { |
758 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 759 | release_openowner(sop); |
1da177e4 | 760 | } |
84d38ac9 BH |
761 | nfsd4_set_callback_client(clp, NULL); |
762 | if (clp->cl_cb_conn.cb_xprt) | |
763 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
764 | list_del(&clp->cl_idhash); |
765 | list_del(&clp->cl_strhash); | |
be1fdf6c | 766 | spin_lock(&client_lock); |
84d38ac9 | 767 | unhash_client_locked(clp); |
46583e25 BH |
768 | if (atomic_read(&clp->cl_refcount) == 0) |
769 | free_client(clp); | |
be1fdf6c | 770 | spin_unlock(&client_lock); |
1da177e4 LT |
771 | } |
772 | ||
35bba9a3 BF |
773 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
774 | { | |
775 | memcpy(target->cl_verifier.data, source->data, | |
776 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
777 | } |
778 | ||
35bba9a3 BF |
779 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
780 | { | |
1da177e4 LT |
781 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
782 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
783 | } | |
784 | ||
35bba9a3 BF |
785 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
786 | { | |
1da177e4 LT |
787 | target->cr_uid = source->cr_uid; |
788 | target->cr_gid = source->cr_gid; | |
789 | target->cr_group_info = source->cr_group_info; | |
790 | get_group_info(target->cr_group_info); | |
791 | } | |
792 | ||
35bba9a3 | 793 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 794 | { |
a55370a3 | 795 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
796 | } |
797 | ||
798 | static int | |
599e0a22 BF |
799 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
800 | { | |
801 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
802 | } |
803 | ||
804 | static int | |
599e0a22 BF |
805 | same_clid(clientid_t *cl1, clientid_t *cl2) |
806 | { | |
807 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
808 | } |
809 | ||
810 | /* XXX what about NGROUP */ | |
811 | static int | |
599e0a22 BF |
812 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
813 | { | |
814 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
815 | } |
816 | ||
5ec7b46c BF |
817 | static void gen_clid(struct nfs4_client *clp) |
818 | { | |
819 | static u32 current_clientid = 1; | |
820 | ||
1da177e4 LT |
821 | clp->cl_clientid.cl_boot = boot_time; |
822 | clp->cl_clientid.cl_id = current_clientid++; | |
823 | } | |
824 | ||
deda2faa BF |
825 | static void gen_confirm(struct nfs4_client *clp) |
826 | { | |
827 | static u32 i; | |
828 | u32 *p; | |
1da177e4 | 829 | |
1da177e4 | 830 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
831 | *p++ = get_seconds(); |
832 | *p++ = i++; | |
1da177e4 LT |
833 | } |
834 | ||
b09333c4 RL |
835 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
836 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
837 | { | |
838 | struct nfs4_client *clp; | |
839 | struct sockaddr *sa = svc_addr(rqstp); | |
840 | char *princ; | |
841 | ||
842 | clp = alloc_client(name); | |
843 | if (clp == NULL) | |
844 | return NULL; | |
845 | ||
846 | princ = svc_gss_principal(rqstp); | |
847 | if (princ) { | |
848 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
849 | if (clp->cl_principal == NULL) { | |
850 | free_client(clp); | |
851 | return NULL; | |
852 | } | |
853 | } | |
854 | ||
855 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 856 | atomic_set(&clp->cl_refcount, 0); |
2bf23875 | 857 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
858 | INIT_LIST_HEAD(&clp->cl_idhash); |
859 | INIT_LIST_HEAD(&clp->cl_strhash); | |
860 | INIT_LIST_HEAD(&clp->cl_openowners); | |
861 | INIT_LIST_HEAD(&clp->cl_delegations); | |
862 | INIT_LIST_HEAD(&clp->cl_sessions); | |
863 | INIT_LIST_HEAD(&clp->cl_lru); | |
07cd4909 | 864 | clp->cl_time = get_seconds(); |
b09333c4 RL |
865 | clear_bit(0, &clp->cl_cb_slot_busy); |
866 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
867 | copy_verf(clp, verf); | |
868 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
869 | clp->cl_flavor = rqstp->rq_flavor; | |
870 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
871 | gen_confirm(clp); | |
872 | ||
873 | return clp; | |
874 | } | |
875 | ||
35bba9a3 BF |
876 | static int check_name(struct xdr_netobj name) |
877 | { | |
1da177e4 LT |
878 | if (name.len == 0) |
879 | return 0; | |
880 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 881 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
882 | return 0; |
883 | } | |
884 | return 1; | |
885 | } | |
886 | ||
fd39ca9a | 887 | static void |
1da177e4 LT |
888 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
889 | { | |
890 | unsigned int idhashval; | |
891 | ||
892 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
893 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
894 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 895 | renew_client(clp); |
1da177e4 LT |
896 | } |
897 | ||
fd39ca9a | 898 | static void |
1da177e4 LT |
899 | move_to_confirmed(struct nfs4_client *clp) |
900 | { | |
901 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
902 | unsigned int strhashval; | |
903 | ||
904 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 905 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 906 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 907 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
908 | renew_client(clp); |
909 | } | |
910 | ||
911 | static struct nfs4_client * | |
912 | find_confirmed_client(clientid_t *clid) | |
913 | { | |
914 | struct nfs4_client *clp; | |
915 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
916 | ||
917 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 918 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
919 | return clp; |
920 | } | |
921 | return NULL; | |
922 | } | |
923 | ||
924 | static struct nfs4_client * | |
925 | find_unconfirmed_client(clientid_t *clid) | |
926 | { | |
927 | struct nfs4_client *clp; | |
928 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
929 | ||
930 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 931 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
932 | return clp; |
933 | } | |
934 | return NULL; | |
935 | } | |
936 | ||
a1bcecd2 AA |
937 | /* |
938 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
939 | * parameter. Matching is based on the fact the at least one of the | |
940 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
941 | * | |
942 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
943 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
944 | * and SET_CLIENTID{,_CONFIRM} | |
945 | */ | |
946 | static inline int | |
947 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
948 | { | |
949 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
950 | return use_exchange_id == has_exchange_flags; | |
951 | } | |
952 | ||
28ce6054 | 953 | static struct nfs4_client * |
a1bcecd2 AA |
954 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
955 | bool use_exchange_id) | |
28ce6054 N |
956 | { |
957 | struct nfs4_client *clp; | |
958 | ||
959 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
960 | if (same_name(clp->cl_recdir, dname) && |
961 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
962 | return clp; |
963 | } | |
964 | return NULL; | |
965 | } | |
966 | ||
967 | static struct nfs4_client * | |
a1bcecd2 AA |
968 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
969 | bool use_exchange_id) | |
28ce6054 N |
970 | { |
971 | struct nfs4_client *clp; | |
972 | ||
973 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
974 | if (same_name(clp->cl_recdir, dname) && |
975 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
976 | return clp; |
977 | } | |
978 | return NULL; | |
979 | } | |
980 | ||
fd39ca9a | 981 | static void |
fbf4665f | 982 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 983 | { |
c237dc03 | 984 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
985 | unsigned short expected_family; |
986 | ||
987 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
988 | if (se->se_callback_netid_len == 3 && | |
989 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
990 | expected_family = AF_INET; | |
991 | else if (se->se_callback_netid_len == 4 && | |
992 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
993 | expected_family = AF_INET6; | |
994 | else | |
1da177e4 LT |
995 | goto out_err; |
996 | ||
aa9a4ec7 JL |
997 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
998 | se->se_callback_addr_len, | |
999 | (struct sockaddr *) &cb->cb_addr, | |
1000 | sizeof(cb->cb_addr)); | |
1001 | ||
7077ecba | 1002 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 1003 | goto out_err; |
aa9a4ec7 | 1004 | |
fbf4665f JL |
1005 | if (cb->cb_addr.ss_family == AF_INET6) |
1006 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
1007 | ||
ab52ae6d | 1008 | cb->cb_minorversion = 0; |
1da177e4 LT |
1009 | cb->cb_prog = se->se_callback_prog; |
1010 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1011 | return; |
1012 | out_err: | |
aa9a4ec7 JL |
1013 | cb->cb_addr.ss_family = AF_UNSPEC; |
1014 | cb->cb_addrlen = 0; | |
849823c5 | 1015 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1016 | "will not receive delegations\n", |
1017 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1018 | ||
1da177e4 LT |
1019 | return; |
1020 | } | |
1021 | ||
074fe897 | 1022 | /* |
557ce264 | 1023 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1024 | */ |
074fe897 AA |
1025 | void |
1026 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1027 | { |
557ce264 AA |
1028 | struct nfsd4_slot *slot = resp->cstate.slot; |
1029 | unsigned int base; | |
074fe897 | 1030 | |
557ce264 | 1031 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1032 | |
557ce264 AA |
1033 | slot->sl_opcnt = resp->opcnt; |
1034 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1035 | |
bf864a31 | 1036 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1037 | slot->sl_datalen = 0; |
bf864a31 | 1038 | return; |
074fe897 | 1039 | } |
557ce264 AA |
1040 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1041 | base = (char *)resp->cstate.datap - | |
1042 | (char *)resp->xbuf->head[0].iov_base; | |
1043 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1044 | slot->sl_datalen)) | |
1045 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1046 | return; | |
074fe897 AA |
1047 | } |
1048 | ||
1049 | /* | |
abfabf8c AA |
1050 | * Encode the replay sequence operation from the slot values. |
1051 | * If cachethis is FALSE encode the uncached rep error on the next | |
1052 | * operation which sets resp->p and increments resp->opcnt for | |
1053 | * nfs4svc_encode_compoundres. | |
074fe897 | 1054 | * |
074fe897 | 1055 | */ |
abfabf8c AA |
1056 | static __be32 |
1057 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1058 | struct nfsd4_compoundres *resp) | |
074fe897 | 1059 | { |
abfabf8c AA |
1060 | struct nfsd4_op *op; |
1061 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1062 | |
abfabf8c | 1063 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1064 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1065 | |
abfabf8c AA |
1066 | /* Encode the replayed sequence operation */ |
1067 | op = &args->ops[resp->opcnt - 1]; | |
1068 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1069 | |
abfabf8c | 1070 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1071 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1072 | op = &args->ops[resp->opcnt++]; |
1073 | op->status = nfserr_retry_uncached_rep; | |
1074 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1075 | } |
abfabf8c | 1076 | return op->status; |
074fe897 AA |
1077 | } |
1078 | ||
1079 | /* | |
557ce264 AA |
1080 | * The sequence operation is not cached because we can use the slot and |
1081 | * session values. | |
074fe897 AA |
1082 | */ |
1083 | __be32 | |
bf864a31 AA |
1084 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1085 | struct nfsd4_sequence *seq) | |
074fe897 | 1086 | { |
557ce264 | 1087 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1088 | __be32 status; |
1089 | ||
557ce264 | 1090 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1091 | |
abfabf8c AA |
1092 | /* Either returns 0 or nfserr_retry_uncached */ |
1093 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1094 | if (status == nfserr_retry_uncached_rep) | |
1095 | return status; | |
074fe897 | 1096 | |
557ce264 AA |
1097 | /* The sequence operation has been encoded, cstate->datap set. */ |
1098 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1099 | |
557ce264 AA |
1100 | resp->opcnt = slot->sl_opcnt; |
1101 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1102 | status = slot->sl_status; | |
074fe897 AA |
1103 | |
1104 | return status; | |
1105 | } | |
1106 | ||
0733d213 AA |
1107 | /* |
1108 | * Set the exchange_id flags returned by the server. | |
1109 | */ | |
1110 | static void | |
1111 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1112 | { | |
1113 | /* pNFS is not supported */ | |
1114 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1115 | ||
1116 | /* Referrals are supported, Migration is not. */ | |
1117 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1118 | ||
1119 | /* set the wire flags to return to client. */ | |
1120 | clid->flags = new->cl_exchange_flags; | |
1121 | } | |
1122 | ||
069b6ad4 AA |
1123 | __be32 |
1124 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1125 | struct nfsd4_compound_state *cstate, | |
1126 | struct nfsd4_exchange_id *exid) | |
1127 | { | |
0733d213 AA |
1128 | struct nfs4_client *unconf, *conf, *new; |
1129 | int status; | |
1130 | unsigned int strhashval; | |
1131 | char dname[HEXDIR_LEN]; | |
363168b4 | 1132 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1133 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1134 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1135 | |
363168b4 | 1136 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1137 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1138 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1139 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1140 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1141 | |
1142 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1143 | return nfserr_inval; | |
1144 | ||
1145 | /* Currently only support SP4_NONE */ | |
1146 | switch (exid->spa_how) { | |
1147 | case SP4_NONE: | |
1148 | break; | |
1149 | case SP4_SSV: | |
1150 | return nfserr_encr_alg_unsupp; | |
1151 | default: | |
1152 | BUG(); /* checked by xdr code */ | |
1153 | case SP4_MACH_CRED: | |
1154 | return nfserr_serverfault; /* no excuse :-/ */ | |
1155 | } | |
1156 | ||
1157 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1158 | ||
1159 | if (status) | |
1160 | goto error; | |
1161 | ||
1162 | strhashval = clientstr_hashval(dname); | |
1163 | ||
1164 | nfs4_lock_state(); | |
1165 | status = nfs_ok; | |
1166 | ||
a1bcecd2 | 1167 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1168 | if (conf) { |
1169 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1170 | /* 18.35.4 case 8 */ | |
1171 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1172 | status = nfserr_not_same; | |
1173 | goto out; | |
1174 | } | |
1175 | /* Client reboot: destroy old state */ | |
1176 | expire_client(conf); | |
1177 | goto out_new; | |
1178 | } | |
1179 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1180 | /* 18.35.4 case 9 */ | |
1181 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1182 | status = nfserr_perm; | |
1183 | goto out; | |
1184 | } | |
1185 | expire_client(conf); | |
1186 | goto out_new; | |
1187 | } | |
0733d213 AA |
1188 | /* |
1189 | * Set bit when the owner id and verifier map to an already | |
1190 | * confirmed client id (18.35.3). | |
1191 | */ | |
1192 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1193 | ||
1194 | /* | |
1195 | * Falling into 18.35.4 case 2, possible router replay. | |
1196 | * Leave confirmed record intact and return same result. | |
1197 | */ | |
1198 | copy_verf(conf, &verf); | |
1199 | new = conf; | |
1200 | goto out_copy; | |
6ddbbbfe MS |
1201 | } |
1202 | ||
1203 | /* 18.35.4 case 7 */ | |
1204 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1205 | status = nfserr_noent; | |
1206 | goto out; | |
0733d213 AA |
1207 | } |
1208 | ||
a1bcecd2 | 1209 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1210 | if (unconf) { |
1211 | /* | |
1212 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1213 | * a new unconfirmed record should be generated regardless | |
1214 | * of whether any properties have changed. | |
1215 | */ | |
1216 | expire_client(unconf); | |
1217 | } | |
1218 | ||
1219 | out_new: | |
1220 | /* Normal case */ | |
b09333c4 | 1221 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1222 | if (new == NULL) { |
bdac86e2 | 1223 | status = nfserr_serverfault; |
0733d213 AA |
1224 | goto out; |
1225 | } | |
1226 | ||
0733d213 | 1227 | gen_clid(new); |
0733d213 AA |
1228 | add_to_unconfirmed(new, strhashval); |
1229 | out_copy: | |
1230 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1231 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1232 | ||
38eb76a5 | 1233 | exid->seqid = 1; |
0733d213 AA |
1234 | nfsd4_set_ex_flags(new, exid); |
1235 | ||
1236 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1237 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1238 | status = nfs_ok; |
1239 | ||
1240 | out: | |
1241 | nfs4_unlock_state(); | |
1242 | error: | |
1243 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1244 | return status; | |
069b6ad4 AA |
1245 | } |
1246 | ||
b85d4c01 | 1247 | static int |
88e588d5 | 1248 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1249 | { |
88e588d5 AA |
1250 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1251 | slot_seqid); | |
b85d4c01 BH |
1252 | |
1253 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1254 | if (slot_inuse) { |
1255 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1256 | return nfserr_jukebox; |
1257 | else | |
1258 | return nfserr_seq_misordered; | |
1259 | } | |
1260 | /* Normal */ | |
88e588d5 | 1261 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1262 | return nfs_ok; |
1263 | /* Replay */ | |
88e588d5 | 1264 | if (seqid == slot_seqid) |
b85d4c01 BH |
1265 | return nfserr_replay_cache; |
1266 | /* Wraparound */ | |
88e588d5 | 1267 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1268 | return nfs_ok; |
1269 | /* Misordered replay or misordered new request */ | |
1270 | return nfserr_seq_misordered; | |
1271 | } | |
1272 | ||
49557cc7 AA |
1273 | /* |
1274 | * Cache the create session result into the create session single DRC | |
1275 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1276 | * Do this for solo or embedded create session operations. | |
1277 | */ | |
1278 | static void | |
1279 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1280 | struct nfsd4_clid_slot *slot, int nfserr) | |
1281 | { | |
1282 | slot->sl_status = nfserr; | |
1283 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1284 | } | |
1285 | ||
1286 | static __be32 | |
1287 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1288 | struct nfsd4_clid_slot *slot) | |
1289 | { | |
1290 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1291 | return slot->sl_status; | |
1292 | } | |
1293 | ||
069b6ad4 AA |
1294 | __be32 |
1295 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1296 | struct nfsd4_compound_state *cstate, | |
1297 | struct nfsd4_create_session *cr_ses) | |
1298 | { | |
363168b4 | 1299 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1300 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1301 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1302 | int status = 0; |
1303 | ||
1304 | nfs4_lock_state(); | |
1305 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1306 | conf = find_confirmed_client(&cr_ses->clientid); | |
1307 | ||
1308 | if (conf) { | |
49557cc7 AA |
1309 | cs_slot = &conf->cl_cs_slot; |
1310 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1311 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1312 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1313 | cs_slot->sl_seqid); |
38eb76a5 | 1314 | /* Return the cached reply status */ |
49557cc7 | 1315 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1316 | goto out; |
49557cc7 | 1317 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1318 | status = nfserr_seq_misordered; |
1319 | dprintk("Sequence misordered!\n"); | |
1320 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1321 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1322 | goto out; |
1323 | } | |
49557cc7 | 1324 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1325 | } else if (unconf) { |
1326 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1327 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1328 | status = nfserr_clid_inuse; |
1329 | goto out; | |
1330 | } | |
1331 | ||
49557cc7 AA |
1332 | cs_slot = &unconf->cl_cs_slot; |
1333 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1334 | if (status) { |
1335 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1336 | status = nfserr_seq_misordered; |
49557cc7 | 1337 | goto out_cache; |
ec6b5d7b AA |
1338 | } |
1339 | ||
49557cc7 | 1340 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1341 | move_to_confirmed(unconf); |
1342 | ||
38524ab3 | 1343 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
2bf23875 BF |
1344 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
1345 | svc_xprt_get(rqstp->rq_xprt); | |
38524ab3 AA |
1346 | rpc_copy_addr( |
1347 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1348 | sa); | |
1349 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1350 | unconf->cl_cb_conn.cb_minorversion = | |
1351 | cstate->minorversion; | |
1352 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1353 | unconf->cl_cb_seq_nr = 1; |
4b21d0de | 1354 | nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); |
38524ab3 | 1355 | } |
ec6b5d7b AA |
1356 | conf = unconf; |
1357 | } else { | |
1358 | status = nfserr_stale_clientid; | |
1359 | goto out; | |
1360 | } | |
1361 | ||
408b79bc BF |
1362 | /* |
1363 | * We do not support RDMA or persistent sessions | |
1364 | */ | |
1365 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1366 | cr_ses->flags &= ~SESSION4_RDMA; | |
1367 | ||
ec6b5d7b AA |
1368 | status = alloc_init_session(rqstp, conf, cr_ses); |
1369 | if (status) | |
1370 | goto out; | |
1371 | ||
ec6b5d7b AA |
1372 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1373 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1374 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1375 | |
49557cc7 AA |
1376 | out_cache: |
1377 | /* cache solo and embedded create sessions under the state lock */ | |
1378 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1379 | out: |
1380 | nfs4_unlock_state(); | |
1381 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1382 | return status; | |
069b6ad4 AA |
1383 | } |
1384 | ||
57716355 BF |
1385 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1386 | { | |
1387 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1388 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1389 | ||
1390 | return argp->opcnt == resp->opcnt; | |
1391 | } | |
1392 | ||
5d4cec2f BF |
1393 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1394 | { | |
1395 | if (!session) | |
1396 | return 0; | |
1397 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1398 | } | |
1399 | ||
069b6ad4 AA |
1400 | __be32 |
1401 | nfsd4_destroy_session(struct svc_rqst *r, | |
1402 | struct nfsd4_compound_state *cstate, | |
1403 | struct nfsd4_destroy_session *sessionid) | |
1404 | { | |
e10e0cfc BH |
1405 | struct nfsd4_session *ses; |
1406 | u32 status = nfserr_badsession; | |
1407 | ||
1408 | /* Notes: | |
1409 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1410 | * - Should we return nfserr_back_chan_busy if waiting for | |
1411 | * callbacks on to-be-destroyed session? | |
1412 | * - Do we need to clear any callback info from previous session? | |
1413 | */ | |
1414 | ||
5d4cec2f | 1415 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1416 | if (!nfsd4_last_compound_op(r)) |
1417 | return nfserr_not_only_op; | |
1418 | } | |
e10e0cfc | 1419 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1420 | spin_lock(&client_lock); |
e10e0cfc BH |
1421 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1422 | if (!ses) { | |
9089f1b4 | 1423 | spin_unlock(&client_lock); |
e10e0cfc BH |
1424 | goto out; |
1425 | } | |
1426 | ||
1427 | unhash_session(ses); | |
9089f1b4 | 1428 | spin_unlock(&client_lock); |
e10e0cfc | 1429 | |
ab707e15 | 1430 | nfs4_lock_state(); |
e10e0cfc | 1431 | /* wait for callbacks */ |
b5a1a81e | 1432 | nfsd4_set_callback_client(ses->se_client, NULL); |
ab707e15 | 1433 | nfs4_unlock_state(); |
e10e0cfc BH |
1434 | nfsd4_put_session(ses); |
1435 | status = nfs_ok; | |
1436 | out: | |
1437 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1438 | return status; | |
069b6ad4 AA |
1439 | } |
1440 | ||
1441 | __be32 | |
b85d4c01 | 1442 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1443 | struct nfsd4_compound_state *cstate, |
1444 | struct nfsd4_sequence *seq) | |
1445 | { | |
f9bb94c4 | 1446 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1447 | struct nfsd4_session *session; |
1448 | struct nfsd4_slot *slot; | |
1449 | int status; | |
1450 | ||
f9bb94c4 AA |
1451 | if (resp->opcnt != 1) |
1452 | return nfserr_sequence_pos; | |
1453 | ||
9089f1b4 | 1454 | spin_lock(&client_lock); |
b85d4c01 BH |
1455 | status = nfserr_badsession; |
1456 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1457 | if (!session) | |
1458 | goto out; | |
1459 | ||
1460 | status = nfserr_badslot; | |
6c18ba9f | 1461 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1462 | goto out; |
1463 | ||
557ce264 | 1464 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1465 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1466 | ||
a8dfdaeb AA |
1467 | /* We do not negotiate the number of slots yet, so set the |
1468 | * maxslots to the session maxreqs which is used to encode | |
1469 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1470 | seq->maxslots = session->se_fchannel.maxreqs; | |
1471 | ||
88e588d5 | 1472 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1473 | if (status == nfserr_replay_cache) { |
1474 | cstate->slot = slot; | |
1475 | cstate->session = session; | |
da3846a2 | 1476 | /* Return the cached reply status and set cstate->status |
557ce264 | 1477 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1478 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1479 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1480 | goto out; |
b85d4c01 BH |
1481 | } |
1482 | if (status) | |
1483 | goto out; | |
1484 | ||
1485 | /* Success! bump slot seqid */ | |
1486 | slot->sl_inuse = true; | |
1487 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1488 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1489 | |
1490 | cstate->slot = slot; | |
1491 | cstate->session = session; | |
1492 | ||
b85d4c01 | 1493 | out: |
26c0c75e | 1494 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1495 | if (cstate->session) { |
36acb66b | 1496 | nfsd4_get_session(cstate->session); |
d7682988 | 1497 | atomic_inc(&session->se_client->cl_refcount); |
aaf84eb9 | 1498 | } |
36acb66b | 1499 | spin_unlock(&client_lock); |
b85d4c01 BH |
1500 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1501 | return status; | |
069b6ad4 AA |
1502 | } |
1503 | ||
4dc6ec00 BF |
1504 | __be32 |
1505 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1506 | { | |
1507 | if (rc->rca_one_fs) { | |
1508 | if (!cstate->current_fh.fh_dentry) | |
1509 | return nfserr_nofilehandle; | |
1510 | /* | |
1511 | * We don't take advantage of the rca_one_fs case. | |
1512 | * That's OK, it's optional, we can safely ignore it. | |
1513 | */ | |
1514 | return nfs_ok; | |
1515 | } | |
1516 | nfs4_lock_state(); | |
1517 | if (is_client_expired(cstate->session->se_client)) { | |
1518 | nfs4_unlock_state(); | |
1519 | /* | |
1520 | * The following error isn't really legal. | |
1521 | * But we only get here if the client just explicitly | |
1522 | * destroyed the client. Surely it no longer cares what | |
1523 | * error it gets back on an operation for the dead | |
1524 | * client. | |
1525 | */ | |
1526 | return nfserr_stale_clientid; | |
1527 | } | |
1528 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1529 | nfs4_unlock_state(); | |
1530 | return nfs_ok; | |
1531 | } | |
1532 | ||
b37ad28b | 1533 | __be32 |
b591480b BF |
1534 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1535 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1536 | { |
363168b4 | 1537 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1538 | struct xdr_netobj clname = { |
1539 | .len = setclid->se_namelen, | |
1540 | .data = setclid->se_name, | |
1541 | }; | |
1542 | nfs4_verifier clverifier = setclid->se_verf; | |
1543 | unsigned int strhashval; | |
28ce6054 | 1544 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1545 | __be32 status; |
a55370a3 | 1546 | char dname[HEXDIR_LEN]; |
1da177e4 | 1547 | |
1da177e4 | 1548 | if (!check_name(clname)) |
73aea4ec | 1549 | return nfserr_inval; |
1da177e4 | 1550 | |
a55370a3 N |
1551 | status = nfs4_make_rec_clidname(dname, &clname); |
1552 | if (status) | |
73aea4ec | 1553 | return status; |
a55370a3 | 1554 | |
1da177e4 LT |
1555 | /* |
1556 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1557 | * We get here on a DRC miss. | |
1558 | */ | |
1559 | ||
a55370a3 | 1560 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1561 | |
1da177e4 | 1562 | nfs4_lock_state(); |
a1bcecd2 | 1563 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1564 | if (conf) { |
a186e767 | 1565 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1566 | status = nfserr_clid_inuse; |
026722c2 | 1567 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1568 | char addr_str[INET6_ADDRSTRLEN]; |
1569 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1570 | sizeof(addr_str)); | |
1571 | dprintk("NFSD: setclientid: string in use by client " | |
1572 | "at %s\n", addr_str); | |
1da177e4 LT |
1573 | goto out; |
1574 | } | |
1da177e4 | 1575 | } |
a186e767 BF |
1576 | /* |
1577 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1578 | * has a description of SETCLIENTID request processing consisting | |
1579 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1580 | */ | |
a1bcecd2 | 1581 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1582 | status = nfserr_resource; |
1583 | if (!conf) { | |
a186e767 BF |
1584 | /* |
1585 | * RFC 3530 14.2.33 CASE 4: | |
1586 | * placed first, because it is the normal case | |
1da177e4 LT |
1587 | */ |
1588 | if (unconf) | |
1589 | expire_client(unconf); | |
b09333c4 | 1590 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1591 | if (new == NULL) |
1da177e4 | 1592 | goto out; |
1da177e4 | 1593 | gen_clid(new); |
599e0a22 | 1594 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1595 | /* |
a186e767 BF |
1596 | * RFC 3530 14.2.33 CASE 1: |
1597 | * probable callback update | |
1da177e4 | 1598 | */ |
31f4a6c1 N |
1599 | if (unconf) { |
1600 | /* Note this is removing unconfirmed {*x***}, | |
1601 | * which is stronger than RFC recommended {vxc**}. | |
1602 | * This has the advantage that there is at most | |
1603 | * one {*x***} in either list at any time. | |
1604 | */ | |
1605 | expire_client(unconf); | |
1da177e4 | 1606 | } |
b09333c4 | 1607 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1608 | if (new == NULL) |
1da177e4 | 1609 | goto out; |
1da177e4 | 1610 | copy_clid(new, conf); |
1da177e4 LT |
1611 | } else if (!unconf) { |
1612 | /* | |
a186e767 BF |
1613 | * RFC 3530 14.2.33 CASE 2: |
1614 | * probable client reboot; state will be removed if | |
1615 | * confirmed. | |
1da177e4 | 1616 | */ |
b09333c4 | 1617 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1618 | if (new == NULL) |
1da177e4 | 1619 | goto out; |
1da177e4 | 1620 | gen_clid(new); |
49ba8781 | 1621 | } else { |
a186e767 BF |
1622 | /* |
1623 | * RFC 3530 14.2.33 CASE 3: | |
1624 | * probable client reboot; state will be removed if | |
1625 | * confirmed. | |
1da177e4 LT |
1626 | */ |
1627 | expire_client(unconf); | |
b09333c4 | 1628 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1629 | if (new == NULL) |
1da177e4 | 1630 | goto out; |
1da177e4 | 1631 | gen_clid(new); |
1da177e4 | 1632 | } |
fbf4665f | 1633 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1634 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1635 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1636 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1637 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1638 | status = nfs_ok; | |
1639 | out: | |
1640 | nfs4_unlock_state(); | |
1641 | return status; | |
1642 | } | |
1643 | ||
1644 | ||
1645 | /* | |
a186e767 BF |
1646 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1647 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1648 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1649 | */ |
b37ad28b | 1650 | __be32 |
b591480b BF |
1651 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1652 | struct nfsd4_compound_state *cstate, | |
1653 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1654 | { |
363168b4 | 1655 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1656 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1657 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1658 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1659 | __be32 status; |
1da177e4 LT |
1660 | |
1661 | if (STALE_CLIENTID(clid)) | |
1662 | return nfserr_stale_clientid; | |
1663 | /* | |
1664 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1665 | * We get here on a DRC miss. | |
1666 | */ | |
1667 | ||
1668 | nfs4_lock_state(); | |
21ab45a4 N |
1669 | |
1670 | conf = find_confirmed_client(clid); | |
1671 | unconf = find_unconfirmed_client(clid); | |
1672 | ||
1673 | status = nfserr_clid_inuse; | |
363168b4 | 1674 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1675 | goto out; |
363168b4 | 1676 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1677 | goto out; |
1678 | ||
a186e767 BF |
1679 | /* |
1680 | * section 14.2.34 of RFC 3530 has a description of | |
1681 | * SETCLIENTID_CONFIRM request processing consisting | |
1682 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1683 | */ | |
366e0c1d | 1684 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1685 | /* |
1686 | * RFC 3530 14.2.34 CASE 1: | |
1687 | * callback update | |
1688 | */ | |
599e0a22 | 1689 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1690 | status = nfserr_clid_inuse; |
1691 | else { | |
2bf23875 | 1692 | atomic_set(&conf->cl_cb_set, 0); |
4b21d0de | 1693 | nfsd4_probe_callback(conf, &unconf->cl_cb_conn); |
1a69c179 | 1694 | expire_client(unconf); |
1da177e4 | 1695 | status = nfs_ok; |
1a69c179 | 1696 | |
1da177e4 | 1697 | } |
f3aba4e5 | 1698 | } else if (conf && !unconf) { |
a186e767 BF |
1699 | /* |
1700 | * RFC 3530 14.2.34 CASE 2: | |
1701 | * probable retransmitted request; play it safe and | |
1702 | * do nothing. | |
7c79f737 | 1703 | */ |
599e0a22 | 1704 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1705 | status = nfserr_clid_inuse; |
21ab45a4 | 1706 | else |
1da177e4 | 1707 | status = nfs_ok; |
7c79f737 | 1708 | } else if (!conf && unconf |
599e0a22 | 1709 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1710 | /* |
1711 | * RFC 3530 14.2.34 CASE 3: | |
1712 | * Normal case; new or rebooted client: | |
7c79f737 | 1713 | */ |
599e0a22 | 1714 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1715 | status = nfserr_clid_inuse; |
1716 | } else { | |
1a69c179 N |
1717 | unsigned int hash = |
1718 | clientstr_hashval(unconf->cl_recdir); | |
1719 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1720 | hash, false); |
1a69c179 | 1721 | if (conf) { |
c7b9a459 | 1722 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1723 | expire_client(conf); |
1724 | } | |
1da177e4 | 1725 | move_to_confirmed(unconf); |
21ab45a4 | 1726 | conf = unconf; |
4b21d0de | 1727 | nfsd4_probe_callback(conf, &conf->cl_cb_conn); |
1a69c179 | 1728 | status = nfs_ok; |
1da177e4 | 1729 | } |
599e0a22 BF |
1730 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1731 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1732 | &confirm)))) { |
a186e767 BF |
1733 | /* |
1734 | * RFC 3530 14.2.34 CASE 4: | |
1735 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1736 | */ |
1da177e4 | 1737 | status = nfserr_stale_clientid; |
7c79f737 | 1738 | } else { |
08e8987c N |
1739 | /* check that we have hit one of the cases...*/ |
1740 | status = nfserr_clid_inuse; | |
1741 | } | |
1da177e4 | 1742 | out: |
1da177e4 LT |
1743 | nfs4_unlock_state(); |
1744 | return status; | |
1745 | } | |
1746 | ||
1da177e4 LT |
1747 | /* OPEN Share state helper functions */ |
1748 | static inline struct nfs4_file * | |
1749 | alloc_init_file(struct inode *ino) | |
1750 | { | |
1751 | struct nfs4_file *fp; | |
1752 | unsigned int hashval = file_hashval(ino); | |
1753 | ||
e60d4398 N |
1754 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1755 | if (fp) { | |
8b671b80 | 1756 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1757 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1758 | INIT_LIST_HEAD(&fp->fi_stateids); |
1759 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1760 | fp->fi_inode = igrab(ino); |
1761 | fp->fi_id = current_fileid++; | |
47f9940c | 1762 | fp->fi_had_conflict = false; |
47cee541 PE |
1763 | spin_lock(&recall_lock); |
1764 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
1765 | spin_unlock(&recall_lock); | |
1da177e4 LT |
1766 | return fp; |
1767 | } | |
1768 | return NULL; | |
1769 | } | |
1770 | ||
e60d4398 | 1771 | static void |
e18b890b | 1772 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1773 | { |
e60d4398 N |
1774 | if (*slab == NULL) |
1775 | return; | |
1a1d92c1 | 1776 | kmem_cache_destroy(*slab); |
e60d4398 | 1777 | *slab = NULL; |
1da177e4 LT |
1778 | } |
1779 | ||
e8ff2a84 | 1780 | void |
1da177e4 LT |
1781 | nfsd4_free_slabs(void) |
1782 | { | |
e60d4398 N |
1783 | nfsd4_free_slab(&stateowner_slab); |
1784 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1785 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1786 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1787 | } |
1da177e4 | 1788 | |
e60d4398 N |
1789 | static int |
1790 | nfsd4_init_slabs(void) | |
1791 | { | |
1792 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1793 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1794 | if (stateowner_slab == NULL) |
1795 | goto out_nomem; | |
1796 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1797 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1798 | if (file_slab == NULL) |
1799 | goto out_nomem; | |
5ac049ac | 1800 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1801 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1802 | if (stateid_slab == NULL) |
1803 | goto out_nomem; | |
5b2d21c1 | 1804 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1805 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1806 | if (deleg_slab == NULL) |
1807 | goto out_nomem; | |
e60d4398 N |
1808 | return 0; |
1809 | out_nomem: | |
1810 | nfsd4_free_slabs(); | |
1811 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1812 | return -ENOMEM; | |
1da177e4 LT |
1813 | } |
1814 | ||
1815 | void | |
1816 | nfs4_free_stateowner(struct kref *kref) | |
1817 | { | |
1818 | struct nfs4_stateowner *sop = | |
1819 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1820 | kfree(sop->so_owner.data); | |
1821 | kmem_cache_free(stateowner_slab, sop); | |
1822 | } | |
1823 | ||
1824 | static inline struct nfs4_stateowner * | |
1825 | alloc_stateowner(struct xdr_netobj *owner) | |
1826 | { | |
1827 | struct nfs4_stateowner *sop; | |
1828 | ||
1829 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1830 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1831 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1832 | sop->so_owner.len = owner->len; | |
1833 | kref_init(&sop->so_ref); | |
1834 | return sop; | |
1835 | } | |
1836 | kmem_cache_free(stateowner_slab, sop); | |
1837 | } | |
1838 | return NULL; | |
1839 | } | |
1840 | ||
1841 | static struct nfs4_stateowner * | |
1842 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1843 | struct nfs4_stateowner *sop; | |
1844 | struct nfs4_replay *rp; | |
1845 | unsigned int idhashval; | |
1846 | ||
1847 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1848 | return NULL; | |
1849 | idhashval = ownerid_hashval(current_ownerid); | |
1850 | INIT_LIST_HEAD(&sop->so_idhash); | |
1851 | INIT_LIST_HEAD(&sop->so_strhash); | |
1852 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1853 | INIT_LIST_HEAD(&sop->so_stateids); |
1854 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1855 | INIT_LIST_HEAD(&sop->so_close_lru); |
1856 | sop->so_time = 0; | |
1857 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1858 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1859 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1860 | sop->so_is_open_owner = 1; |
1861 | sop->so_id = current_ownerid++; | |
1862 | sop->so_client = clp; | |
1863 | sop->so_seqid = open->op_seqid; | |
1864 | sop->so_confirmed = 0; | |
1865 | rp = &sop->so_replay; | |
de1ae286 | 1866 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1867 | rp->rp_buflen = 0; |
1868 | rp->rp_buf = rp->rp_ibuf; | |
1869 | return sop; | |
1870 | } | |
1871 | ||
1da177e4 LT |
1872 | static inline void |
1873 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1874 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1875 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1876 | ||
1877 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1878 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1879 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1880 | INIT_LIST_HEAD(&stp->st_perfile); |
1881 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1882 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1883 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1884 | stp->st_stateowner = sop; |
13cd2184 | 1885 | get_nfs4_file(fp); |
1da177e4 | 1886 | stp->st_file = fp; |
e4e83ea4 | 1887 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
1888 | stp->st_stateid.si_stateownerid = sop->so_id; |
1889 | stp->st_stateid.si_fileid = fp->fi_id; | |
1890 | stp->st_stateid.si_generation = 0; | |
1891 | stp->st_access_bmap = 0; | |
1892 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1893 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1894 | &stp->st_access_bmap); | |
1da177e4 | 1895 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1896 | stp->st_openstp = NULL; |
1da177e4 LT |
1897 | } |
1898 | ||
fd39ca9a | 1899 | static void |
1da177e4 LT |
1900 | move_to_close_lru(struct nfs4_stateowner *sop) |
1901 | { | |
1902 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1903 | ||
358dd55a | 1904 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1905 | sop->so_time = get_seconds(); |
1906 | } | |
1907 | ||
1da177e4 | 1908 | static int |
599e0a22 BF |
1909 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1910 | clientid_t *clid) | |
1911 | { | |
1912 | return (sop->so_owner.len == owner->len) && | |
1913 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1914 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1915 | } |
1916 | ||
1917 | static struct nfs4_stateowner * | |
1918 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1919 | { | |
1920 | struct nfs4_stateowner *so = NULL; | |
1921 | ||
1922 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1923 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1924 | return so; |
1925 | } | |
1926 | return NULL; | |
1927 | } | |
1928 | ||
1929 | /* search file_hashtbl[] for file */ | |
1930 | static struct nfs4_file * | |
1931 | find_file(struct inode *ino) | |
1932 | { | |
1933 | unsigned int hashval = file_hashval(ino); | |
1934 | struct nfs4_file *fp; | |
1935 | ||
8b671b80 | 1936 | spin_lock(&recall_lock); |
1da177e4 | 1937 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1938 | if (fp->fi_inode == ino) { |
1939 | get_nfs4_file(fp); | |
8b671b80 | 1940 | spin_unlock(&recall_lock); |
1da177e4 | 1941 | return fp; |
13cd2184 | 1942 | } |
1da177e4 | 1943 | } |
8b671b80 | 1944 | spin_unlock(&recall_lock); |
1da177e4 LT |
1945 | return NULL; |
1946 | } | |
1947 | ||
d87a8ade | 1948 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1949 | { |
d87a8ade | 1950 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1951 | return 0; |
d87a8ade AA |
1952 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1953 | return 0; | |
1954 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1955 | if (minorversion && x) { | |
1956 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1957 | return 0; | |
1958 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1959 | return 0; | |
1960 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1961 | } | |
1962 | if (x) | |
8838dc43 BF |
1963 | return 0; |
1964 | return 1; | |
ba5a6a19 BF |
1965 | } |
1966 | ||
8838dc43 | 1967 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1968 | { |
8838dc43 BF |
1969 | /* Note: unlike access bits, deny bits may be zero. */ |
1970 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1971 | } |
1da177e4 | 1972 | |
4f83aa30 BF |
1973 | /* |
1974 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1975 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1976 | * only what share bits are currently in force, but also what | |
1977 | * combinations of share bits previous opens have used. This allows us | |
1978 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1979 | * return an error if the client attempt to downgrade to a combination | |
1980 | * of share bits not explicable by closing some of its previous opens. | |
1981 | * | |
1982 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1983 | * track of access/deny bit combinations; so, e.g., we allow: | |
1984 | * | |
1985 | * OPEN allow read, deny write | |
1986 | * OPEN allow both, deny none | |
1987 | * DOWNGRADE allow read, deny none | |
1988 | * | |
1989 | * which we should reject. | |
1990 | */ | |
fd39ca9a | 1991 | static void |
1da177e4 LT |
1992 | set_access(unsigned int *access, unsigned long bmap) { |
1993 | int i; | |
1994 | ||
1995 | *access = 0; | |
1996 | for (i = 1; i < 4; i++) { | |
1997 | if (test_bit(i, &bmap)) | |
1998 | *access |= i; | |
1999 | } | |
2000 | } | |
2001 | ||
fd39ca9a | 2002 | static void |
1da177e4 LT |
2003 | set_deny(unsigned int *deny, unsigned long bmap) { |
2004 | int i; | |
2005 | ||
2006 | *deny = 0; | |
2007 | for (i = 0; i < 4; i++) { | |
2008 | if (test_bit(i, &bmap)) | |
2009 | *deny |= i ; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | static int | |
2014 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
2015 | unsigned int access, deny; | |
2016 | ||
2017 | set_access(&access, stp->st_access_bmap); | |
2018 | set_deny(&deny, stp->st_deny_bmap); | |
2019 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
2020 | return 0; | |
2021 | return 1; | |
2022 | } | |
2023 | ||
2024 | /* | |
2025 | * Called to check deny when READ with all zero stateid or | |
2026 | * WRITE with all zero or all one stateid | |
2027 | */ | |
b37ad28b | 2028 | static __be32 |
1da177e4 LT |
2029 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2030 | { | |
2031 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2032 | struct nfs4_file *fp; | |
2033 | struct nfs4_stateid *stp; | |
b37ad28b | 2034 | __be32 ret; |
1da177e4 LT |
2035 | |
2036 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2037 | ||
2038 | fp = find_file(ino); | |
13cd2184 N |
2039 | if (!fp) |
2040 | return nfs_ok; | |
b700949b | 2041 | ret = nfserr_locked; |
1da177e4 | 2042 | /* Search for conflicting share reservations */ |
13cd2184 N |
2043 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2044 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2045 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2046 | goto out; | |
1da177e4 | 2047 | } |
13cd2184 N |
2048 | ret = nfs_ok; |
2049 | out: | |
2050 | put_nfs4_file(fp); | |
2051 | return ret; | |
1da177e4 LT |
2052 | } |
2053 | ||
2054 | static inline void | |
2055 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2056 | { | |
2057 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2058 | drop_file_write_access(filp); |
42e49608 | 2059 | spin_lock(&filp->f_lock); |
1da177e4 | 2060 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
42e49608 | 2061 | spin_unlock(&filp->f_lock); |
1da177e4 LT |
2062 | } |
2063 | } | |
2064 | ||
1da177e4 LT |
2065 | /* |
2066 | * Spawn a thread to perform a recall on the delegation represented | |
2067 | * by the lease (file_lock) | |
2068 | * | |
2069 | * Called from break_lease() with lock_kernel() held. | |
2070 | * Note: we assume break_lease will only call this *once* for any given | |
2071 | * lease. | |
2072 | */ | |
2073 | static | |
2074 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2075 | { | |
63e4863f | 2076 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2077 | |
2078 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2079 | if (!dp) | |
2080 | return; | |
2081 | ||
2082 | /* We're assuming the state code never drops its reference | |
2083 | * without first removing the lease. Since we're in this lease | |
2084 | * callback (and since the lease code is serialized by the kernel | |
2085 | * lock) we know the server hasn't removed the lease yet, we know | |
2086 | * it's safe to take a reference: */ | |
2087 | atomic_inc(&dp->dl_count); | |
2088 | ||
2089 | spin_lock(&recall_lock); | |
2090 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2091 | spin_unlock(&recall_lock); | |
2092 | ||
2093 | /* only place dl_time is set. protected by lock_kernel*/ | |
2094 | dp->dl_time = get_seconds(); | |
2095 | ||
0272e1fd BF |
2096 | /* |
2097 | * We don't want the locks code to timeout the lease for us; | |
2098 | * we'll remove it ourself if the delegation isn't returned | |
2099 | * in time. | |
2100 | */ | |
2101 | fl->fl_break_time = 0; | |
1da177e4 | 2102 | |
63e4863f BF |
2103 | dp->dl_file->fi_had_conflict = true; |
2104 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2105 | } |
2106 | ||
2107 | /* | |
2108 | * The file_lock is being reapd. | |
2109 | * | |
2110 | * Called by locks_free_lock() with lock_kernel() held. | |
2111 | */ | |
2112 | static | |
2113 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2114 | { | |
2115 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2116 | ||
2117 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2118 | ||
2119 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2120 | return; | |
2121 | dp->dl_flock = NULL; | |
2122 | } | |
2123 | ||
2124 | /* | |
2125 | * Set the delegation file_lock back pointer. | |
2126 | * | |
a9933cea | 2127 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2128 | */ |
2129 | static | |
2130 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2131 | { | |
2132 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2133 | ||
2134 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2135 | if (!dp) | |
2136 | return; | |
2137 | dp->dl_flock = new; | |
2138 | } | |
2139 | ||
2140 | /* | |
a9933cea | 2141 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2142 | */ |
2143 | static | |
2144 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2145 | { | |
2146 | struct nfs4_delegation *onlistd = | |
2147 | (struct nfs4_delegation *)onlist->fl_owner; | |
2148 | struct nfs4_delegation *tryd = | |
2149 | (struct nfs4_delegation *)try->fl_owner; | |
2150 | ||
2151 | if (onlist->fl_lmops != try->fl_lmops) | |
2152 | return 0; | |
2153 | ||
2154 | return onlistd->dl_client == tryd->dl_client; | |
2155 | } | |
2156 | ||
2157 | ||
2158 | static | |
2159 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2160 | { | |
2161 | if (arg & F_UNLCK) | |
2162 | return lease_modify(onlist, arg); | |
2163 | else | |
2164 | return -EAGAIN; | |
2165 | } | |
2166 | ||
7b021967 | 2167 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2168 | .fl_break = nfsd_break_deleg_cb, |
2169 | .fl_release_private = nfsd_release_deleg_cb, | |
2170 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2171 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2172 | .fl_change = nfsd_change_deleg_cb, | |
2173 | }; | |
2174 | ||
2175 | ||
b37ad28b | 2176 | __be32 |
6668958f AA |
2177 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2178 | struct nfsd4_open *open) | |
1da177e4 | 2179 | { |
1da177e4 LT |
2180 | clientid_t *clientid = &open->op_clientid; |
2181 | struct nfs4_client *clp = NULL; | |
2182 | unsigned int strhashval; | |
2183 | struct nfs4_stateowner *sop = NULL; | |
2184 | ||
1da177e4 | 2185 | if (!check_name(open->op_owner)) |
0f442aa2 | 2186 | return nfserr_inval; |
1da177e4 LT |
2187 | |
2188 | if (STALE_CLIENTID(&open->op_clientid)) | |
2189 | return nfserr_stale_clientid; | |
2190 | ||
2191 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2192 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2193 | open->op_stateowner = sop; |
2194 | if (!sop) { | |
2195 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2196 | clp = find_confirmed_client(clientid); |
2197 | if (clp == NULL) | |
0f442aa2 BF |
2198 | return nfserr_expired; |
2199 | goto renew; | |
1da177e4 | 2200 | } |
6668958f AA |
2201 | /* When sessions are used, skip open sequenceid processing */ |
2202 | if (nfsd4_has_session(cstate)) | |
2203 | goto renew; | |
0f442aa2 BF |
2204 | if (!sop->so_confirmed) { |
2205 | /* Replace unconfirmed owners without checking for replay. */ | |
2206 | clp = sop->so_client; | |
f044ff83 | 2207 | release_openowner(sop); |
0f442aa2 BF |
2208 | open->op_stateowner = NULL; |
2209 | goto renew; | |
2210 | } | |
2211 | if (open->op_seqid == sop->so_seqid - 1) { | |
2212 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2213 | return nfserr_replay_me; |
0f442aa2 BF |
2214 | /* The original OPEN failed so spectacularly |
2215 | * that we don't even have replay data saved! | |
2216 | * Therefore, we have no choice but to continue | |
2217 | * processing this OPEN; presumably, we'll | |
2218 | * fail again for the same reason. | |
2219 | */ | |
2220 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2221 | goto renew; | |
2222 | } | |
2223 | if (open->op_seqid != sop->so_seqid) | |
2224 | return nfserr_bad_seqid; | |
1da177e4 | 2225 | renew: |
0f442aa2 BF |
2226 | if (open->op_stateowner == NULL) { |
2227 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2228 | if (sop == NULL) | |
2229 | return nfserr_resource; | |
2230 | open->op_stateowner = sop; | |
2231 | } | |
2232 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2233 | renew_client(sop->so_client); |
0f442aa2 | 2234 | return nfs_ok; |
1da177e4 LT |
2235 | } |
2236 | ||
b37ad28b | 2237 | static inline __be32 |
4a6e43e6 N |
2238 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2239 | { | |
2240 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2241 | return nfserr_openmode; | |
2242 | else | |
2243 | return nfs_ok; | |
2244 | } | |
2245 | ||
52f4fb43 N |
2246 | static struct nfs4_delegation * |
2247 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2248 | { | |
2249 | struct nfs4_delegation *dp; | |
2250 | ||
ea1da636 | 2251 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2252 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2253 | return dp; | |
2254 | } | |
2255 | return NULL; | |
2256 | } | |
2257 | ||
b37ad28b | 2258 | static __be32 |
567d9829 N |
2259 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2260 | struct nfs4_delegation **dp) | |
2261 | { | |
2262 | int flags; | |
b37ad28b | 2263 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2264 | |
2265 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2266 | if (*dp == NULL) | |
c44c5eeb | 2267 | goto out; |
567d9829 N |
2268 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2269 | RD_STATE : WR_STATE; | |
2270 | status = nfs4_check_delegmode(*dp, flags); | |
2271 | if (status) | |
2272 | *dp = NULL; | |
c44c5eeb N |
2273 | out: |
2274 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2275 | return nfs_ok; | |
2276 | if (status) | |
2277 | return status; | |
2278 | open->op_stateowner->so_confirmed = 1; | |
2279 | return nfs_ok; | |
567d9829 N |
2280 | } |
2281 | ||
b37ad28b | 2282 | static __be32 |
1da177e4 LT |
2283 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2284 | { | |
2285 | struct nfs4_stateid *local; | |
b37ad28b | 2286 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2287 | struct nfs4_stateowner *sop = open->op_stateowner; |
2288 | ||
8beefa24 | 2289 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2290 | /* ignore lock owners */ |
2291 | if (local->st_stateowner->so_is_open_owner == 0) | |
2292 | continue; | |
2293 | /* remember if we have seen this open owner */ | |
2294 | if (local->st_stateowner == sop) | |
2295 | *stpp = local; | |
2296 | /* check for conflicting share reservations */ | |
2297 | if (!test_share(local, open)) | |
2298 | goto out; | |
2299 | } | |
2300 | status = 0; | |
2301 | out: | |
2302 | return status; | |
2303 | } | |
2304 | ||
5ac049ac N |
2305 | static inline struct nfs4_stateid * |
2306 | nfs4_alloc_stateid(void) | |
2307 | { | |
2308 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2309 | } | |
2310 | ||
b37ad28b | 2311 | static __be32 |
1da177e4 | 2312 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2313 | struct nfs4_delegation *dp, |
1da177e4 LT |
2314 | struct svc_fh *cur_fh, int flags) |
2315 | { | |
2316 | struct nfs4_stateid *stp; | |
1da177e4 | 2317 | |
5ac049ac | 2318 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2319 | if (stp == NULL) |
2320 | return nfserr_resource; | |
2321 | ||
567d9829 N |
2322 | if (dp) { |
2323 | get_file(dp->dl_vfs_file); | |
2324 | stp->st_vfs_file = dp->dl_vfs_file; | |
2325 | } else { | |
b37ad28b | 2326 | __be32 status; |
567d9829 N |
2327 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2328 | &stp->st_vfs_file); | |
2329 | if (status) { | |
2330 | if (status == nfserr_dropit) | |
2331 | status = nfserr_jukebox; | |
5ac049ac | 2332 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2333 | return status; |
2334 | } | |
1da177e4 | 2335 | } |
1da177e4 LT |
2336 | *stpp = stp; |
2337 | return 0; | |
2338 | } | |
2339 | ||
b37ad28b | 2340 | static inline __be32 |
1da177e4 LT |
2341 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2342 | struct nfsd4_open *open) | |
2343 | { | |
2344 | struct iattr iattr = { | |
2345 | .ia_valid = ATTR_SIZE, | |
2346 | .ia_size = 0, | |
2347 | }; | |
2348 | if (!open->op_truncate) | |
2349 | return 0; | |
2350 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2351 | return nfserr_inval; |
1da177e4 LT |
2352 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2353 | } | |
2354 | ||
b37ad28b | 2355 | static __be32 |
1da177e4 LT |
2356 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2357 | { | |
2358 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2359 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2360 | unsigned int share_access, new_writer; |
b37ad28b | 2361 | __be32 status; |
1da177e4 LT |
2362 | |
2363 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2364 | new_writer = (~share_access) & open->op_share_access |
2365 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2366 | |
6c26d08f | 2367 | if (new_writer) { |
b37ad28b AV |
2368 | int err = get_write_access(inode); |
2369 | if (err) | |
2370 | return nfserrno(err); | |
e518f056 BH |
2371 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2372 | if (err) | |
2373 | return nfserrno(err); | |
2374 | file_take_write(filp); | |
6c26d08f | 2375 | } |
1da177e4 LT |
2376 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2377 | if (status) { | |
6c26d08f BF |
2378 | if (new_writer) |
2379 | put_write_access(inode); | |
1da177e4 LT |
2380 | return status; |
2381 | } | |
2382 | /* remember the open */ | |
6c26d08f | 2383 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2384 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2385 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2386 | |
2387 | return nfs_ok; | |
2388 | } | |
2389 | ||
2390 | ||
1da177e4 | 2391 | static void |
37515177 | 2392 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2393 | { |
37515177 N |
2394 | open->op_stateowner->so_confirmed = 1; |
2395 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2396 | } |
2397 | ||
2398 | /* | |
2399 | * Attempt to hand out a delegation. | |
2400 | */ | |
2401 | static void | |
2402 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2403 | { | |
2404 | struct nfs4_delegation *dp; | |
2405 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2406 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2407 | struct file_lock fl, *flp = &fl; |
2408 | int status, flag = 0; | |
2409 | ||
2410 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2411 | open->op_recall = 0; |
2412 | switch (open->op_claim_type) { | |
2413 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2414 | if (!cb_up) |
7b190fec N |
2415 | open->op_recall = 1; |
2416 | flag = open->op_delegate_type; | |
2417 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2418 | goto out; | |
2419 | break; | |
2420 | case NFS4_OPEN_CLAIM_NULL: | |
2421 | /* Let's not give out any delegations till everyone's | |
2422 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2423 | if (locks_in_grace()) |
7b190fec | 2424 | goto out; |
2bf23875 | 2425 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2426 | goto out; |
2427 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2428 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2429 | else | |
2430 | flag = NFS4_OPEN_DELEGATE_READ; | |
2431 | break; | |
2432 | default: | |
2433 | goto out; | |
2434 | } | |
1da177e4 LT |
2435 | |
2436 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2437 | if (dp == NULL) { | |
2438 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2439 | goto out; | |
2440 | } | |
2441 | locks_init_lock(&fl); | |
2442 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2443 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2444 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2445 | fl.fl_end = OFFSET_MAX; |
2446 | fl.fl_owner = (fl_owner_t)dp; | |
2447 | fl.fl_file = stp->st_vfs_file; | |
2448 | fl.fl_pid = current->tgid; | |
2449 | ||
a9933cea | 2450 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2451 | * the lock_manager callbacks fl_mylease and fl_change are used |
2452 | */ | |
9167f501 | 2453 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2454 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2455 | unhash_delegation(dp); |
1da177e4 LT |
2456 | flag = NFS4_OPEN_DELEGATE_NONE; |
2457 | goto out; | |
2458 | } | |
2459 | ||
2460 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2461 | ||
8c10cbdb BH |
2462 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2463 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2464 | out: |
7b190fec N |
2465 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2466 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2467 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2468 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2469 | open->op_delegate_type = flag; |
2470 | } | |
2471 | ||
2472 | /* | |
2473 | * called with nfs4_lock_state() held. | |
2474 | */ | |
b37ad28b | 2475 | __be32 |
1da177e4 LT |
2476 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2477 | { | |
6668958f | 2478 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2479 | struct nfs4_file *fp = NULL; |
2480 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2481 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2482 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2483 | __be32 status; |
1da177e4 LT |
2484 | |
2485 | status = nfserr_inval; | |
d87a8ade | 2486 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2487 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2488 | goto out; |
2489 | /* | |
2490 | * Lookup file; if found, lookup stateid and check open request, | |
2491 | * and check for delegations in the process of being recalled. | |
2492 | * If not found, create the nfs4_file struct | |
2493 | */ | |
2494 | fp = find_file(ino); | |
2495 | if (fp) { | |
2496 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2497 | goto out; | |
c44c5eeb N |
2498 | status = nfs4_check_deleg(fp, open, &dp); |
2499 | if (status) | |
2500 | goto out; | |
1da177e4 | 2501 | } else { |
c44c5eeb N |
2502 | status = nfserr_bad_stateid; |
2503 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2504 | goto out; | |
1da177e4 LT |
2505 | status = nfserr_resource; |
2506 | fp = alloc_init_file(ino); | |
2507 | if (fp == NULL) | |
2508 | goto out; | |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * OPEN the file, or upgrade an existing OPEN. | |
2513 | * If truncate fails, the OPEN fails. | |
2514 | */ | |
2515 | if (stp) { | |
2516 | /* Stateid was found, this is an OPEN upgrade */ | |
2517 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2518 | if (status) | |
2519 | goto out; | |
444c2c07 | 2520 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2521 | } else { |
2522 | /* Stateid was not found, this is a new OPEN */ | |
2523 | int flags = 0; | |
9ecb6a08 | 2524 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2525 | flags |= NFSD_MAY_READ; |
1da177e4 | 2526 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2527 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2528 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2529 | if (status) | |
1da177e4 LT |
2530 | goto out; |
2531 | init_stateid(stp, fp, open); | |
2532 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2533 | if (status) { | |
2283963f | 2534 | release_open_stateid(stp); |
1da177e4 LT |
2535 | goto out; |
2536 | } | |
6668958f AA |
2537 | if (nfsd4_has_session(&resp->cstate)) |
2538 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2539 | } |
2540 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2541 | ||
4dc6ec00 | 2542 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2543 | open->op_stateowner->so_confirmed = 1; |
2544 | ||
1da177e4 LT |
2545 | /* |
2546 | * Attempt to hand out a delegation. No error return, because the | |
2547 | * OPEN succeeds even if we fail. | |
2548 | */ | |
2549 | nfs4_open_delegation(current_fh, open, stp); | |
2550 | ||
2551 | status = nfs_ok; | |
2552 | ||
8c10cbdb BH |
2553 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2554 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2555 | out: |
13cd2184 N |
2556 | if (fp) |
2557 | put_nfs4_file(fp); | |
37515177 N |
2558 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2559 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2560 | /* |
2561 | * To finish the open response, we just need to set the rflags. | |
2562 | */ | |
2563 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2564 | if (!open->op_stateowner->so_confirmed && |
2565 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2566 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2567 | ||
2568 | return status; | |
2569 | } | |
2570 | ||
b37ad28b | 2571 | __be32 |
b591480b BF |
2572 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2573 | clientid_t *clid) | |
1da177e4 LT |
2574 | { |
2575 | struct nfs4_client *clp; | |
b37ad28b | 2576 | __be32 status; |
1da177e4 LT |
2577 | |
2578 | nfs4_lock_state(); | |
2579 | dprintk("process_renew(%08x/%08x): starting\n", | |
2580 | clid->cl_boot, clid->cl_id); | |
2581 | status = nfserr_stale_clientid; | |
2582 | if (STALE_CLIENTID(clid)) | |
2583 | goto out; | |
2584 | clp = find_confirmed_client(clid); | |
2585 | status = nfserr_expired; | |
2586 | if (clp == NULL) { | |
2587 | /* We assume the client took too long to RENEW. */ | |
2588 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2589 | goto out; | |
2590 | } | |
2591 | renew_client(clp); | |
2592 | status = nfserr_cb_path_down; | |
ea1da636 | 2593 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2594 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2595 | goto out; |
2596 | status = nfs_ok; | |
2597 | out: | |
2598 | nfs4_unlock_state(); | |
2599 | return status; | |
2600 | } | |
2601 | ||
af558e33 BF |
2602 | struct lock_manager nfsd4_manager = { |
2603 | }; | |
2604 | ||
a76b4319 | 2605 | static void |
af558e33 | 2606 | nfsd4_end_grace(void) |
a76b4319 N |
2607 | { |
2608 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2609 | nfsd4_recdir_purge_old(); |
af558e33 | 2610 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2611 | /* |
2612 | * Now that every NFSv4 client has had the chance to recover and | |
2613 | * to see the (possibly new, possibly shorter) lease time, we | |
2614 | * can safely set the next grace time to the current lease time: | |
2615 | */ | |
2616 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2617 | } |
2618 | ||
fd39ca9a | 2619 | static time_t |
1da177e4 LT |
2620 | nfs4_laundromat(void) |
2621 | { | |
2622 | struct nfs4_client *clp; | |
2623 | struct nfs4_stateowner *sop; | |
2624 | struct nfs4_delegation *dp; | |
2625 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2626 | time_t cutoff = get_seconds() - nfsd4_lease; |
2627 | time_t t, clientid_val = nfsd4_lease; | |
2628 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2629 | |
2630 | nfs4_lock_state(); | |
2631 | ||
2632 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2633 | if (locks_in_grace()) |
2634 | nfsd4_end_grace(); | |
36acb66b BH |
2635 | INIT_LIST_HEAD(&reaplist); |
2636 | spin_lock(&client_lock); | |
1da177e4 LT |
2637 | list_for_each_safe(pos, next, &client_lru) { |
2638 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2639 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2640 | t = clp->cl_time - cutoff; | |
2641 | if (clientid_val > t) | |
2642 | clientid_val = t; | |
2643 | break; | |
2644 | } | |
d7682988 BH |
2645 | if (atomic_read(&clp->cl_refcount)) { |
2646 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2647 | clp->cl_clientid.cl_id); | |
2648 | continue; | |
2649 | } | |
2650 | unhash_client_locked(clp); | |
2651 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2652 | } |
2653 | spin_unlock(&client_lock); | |
2654 | list_for_each_safe(pos, next, &reaplist) { | |
2655 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2656 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2657 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2658 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2659 | expire_client(clp); |
2660 | } | |
1da177e4 LT |
2661 | spin_lock(&recall_lock); |
2662 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2663 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2664 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2665 | u = dp->dl_time - cutoff; | |
2666 | if (test_val > u) | |
2667 | test_val = u; | |
2668 | break; | |
2669 | } | |
2670 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2671 | dp, dp->dl_flock); | |
2672 | list_move(&dp->dl_recall_lru, &reaplist); | |
2673 | } | |
2674 | spin_unlock(&recall_lock); | |
2675 | list_for_each_safe(pos, next, &reaplist) { | |
2676 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2677 | list_del_init(&dp->dl_recall_lru); | |
2678 | unhash_delegation(dp); | |
2679 | } | |
cf07d2ea | 2680 | test_val = nfsd4_lease; |
1da177e4 LT |
2681 | list_for_each_safe(pos, next, &close_lru) { |
2682 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2683 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2684 | u = sop->so_time - cutoff; | |
2685 | if (test_val > u) | |
2686 | test_val = u; | |
2687 | break; | |
2688 | } | |
2689 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2690 | sop->so_id); | |
f044ff83 | 2691 | release_openowner(sop); |
1da177e4 LT |
2692 | } |
2693 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2694 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2695 | nfs4_unlock_state(); | |
2696 | return clientid_val; | |
2697 | } | |
2698 | ||
a254b246 HH |
2699 | static struct workqueue_struct *laundry_wq; |
2700 | static void laundromat_main(struct work_struct *); | |
2701 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2702 | ||
2703 | static void | |
c4028958 | 2704 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2705 | { |
2706 | time_t t; | |
2707 | ||
2708 | t = nfs4_laundromat(); | |
2709 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2710 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2711 | } |
2712 | ||
fd39ca9a | 2713 | static struct nfs4_stateowner * |
f8816512 N |
2714 | search_close_lru(u32 st_id, int flags) |
2715 | { | |
1da177e4 LT |
2716 | struct nfs4_stateowner *local = NULL; |
2717 | ||
1da177e4 LT |
2718 | if (flags & CLOSE_STATE) { |
2719 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2720 | if (local->so_id == st_id) | |
2721 | return local; | |
2722 | } | |
2723 | } | |
2724 | return NULL; | |
2725 | } | |
2726 | ||
2727 | static inline int | |
2728 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2729 | { | |
7eaa36e2 | 2730 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2731 | } |
2732 | ||
2733 | static int | |
2734 | STALE_STATEID(stateid_t *stateid) | |
2735 | { | |
e4e83ea4 BF |
2736 | if (stateid->si_boot == boot_time) |
2737 | return 0; | |
2738 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 2739 | STATEID_VAL(stateid)); |
e4e83ea4 | 2740 | return 1; |
1da177e4 LT |
2741 | } |
2742 | ||
2743 | static inline int | |
2744 | access_permit_read(unsigned long access_bmap) | |
2745 | { | |
2746 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2747 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2748 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2749 | } | |
2750 | ||
2751 | static inline int | |
2752 | access_permit_write(unsigned long access_bmap) | |
2753 | { | |
2754 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2755 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2756 | } | |
2757 | ||
2758 | static | |
b37ad28b | 2759 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2760 | { |
b37ad28b | 2761 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2762 | |
2763 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2764 | goto out; | |
2765 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2766 | goto out; | |
2767 | status = nfs_ok; | |
2768 | out: | |
2769 | return status; | |
2770 | } | |
2771 | ||
b37ad28b | 2772 | static inline __be32 |
1da177e4 LT |
2773 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2774 | { | |
203a8c8e | 2775 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2776 | return nfs_ok; |
af558e33 | 2777 | else if (locks_in_grace()) { |
1da177e4 LT |
2778 | /* Answer in remaining cases depends on existance of |
2779 | * conflicting state; so we must wait out the grace period. */ | |
2780 | return nfserr_grace; | |
2781 | } else if (flags & WR_STATE) | |
2782 | return nfs4_share_conflict(current_fh, | |
2783 | NFS4_SHARE_DENY_WRITE); | |
2784 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2785 | return nfs4_share_conflict(current_fh, | |
2786 | NFS4_SHARE_DENY_READ); | |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * Allow READ/WRITE during grace period on recovered state only for files | |
2791 | * that are not able to provide mandatory locking. | |
2792 | */ | |
2793 | static inline int | |
18f82731 | 2794 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2795 | { |
203a8c8e | 2796 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2797 | } |
2798 | ||
6668958f | 2799 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2800 | { |
6668958f AA |
2801 | /* |
2802 | * When sessions are used the stateid generation number is ignored | |
2803 | * when it is zero. | |
2804 | */ | |
2805 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2806 | goto out; | |
2807 | ||
0836f587 BF |
2808 | /* If the client sends us a stateid from the future, it's buggy: */ |
2809 | if (in->si_generation > ref->si_generation) | |
2810 | return nfserr_bad_stateid; | |
2811 | /* | |
2812 | * The following, however, can happen. For example, if the | |
2813 | * client sends an open and some IO at the same time, the open | |
2814 | * may bump si_generation while the IO is still in flight. | |
2815 | * Thanks to hard links and renames, the client never knows what | |
2816 | * file an open will affect. So it could avoid that situation | |
2817 | * only by serializing all opens and IO from the same open | |
2818 | * owner. To recover from the old_stateid error, the client | |
2819 | * will just have to retry the IO: | |
2820 | */ | |
2821 | if (in->si_generation < ref->si_generation) | |
2822 | return nfserr_old_stateid; | |
6668958f | 2823 | out: |
0836f587 BF |
2824 | return nfs_ok; |
2825 | } | |
2826 | ||
3e633079 BF |
2827 | static int is_delegation_stateid(stateid_t *stateid) |
2828 | { | |
2829 | return stateid->si_fileid == 0; | |
2830 | } | |
2831 | ||
1da177e4 LT |
2832 | /* |
2833 | * Checks for stateid operations | |
2834 | */ | |
b37ad28b | 2835 | __be32 |
dd453dfd BH |
2836 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2837 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2838 | { |
2839 | struct nfs4_stateid *stp = NULL; | |
2840 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2841 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2842 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2843 | __be32 status; |
1da177e4 | 2844 | |
1da177e4 LT |
2845 | if (filpp) |
2846 | *filpp = NULL; | |
2847 | ||
18f82731 | 2848 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2849 | return nfserr_grace; |
2850 | ||
6668958f AA |
2851 | if (nfsd4_has_session(cstate)) |
2852 | flags |= HAS_SESSION; | |
2853 | ||
1da177e4 LT |
2854 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2855 | return check_special_stateids(current_fh, stateid, flags); | |
2856 | ||
1da177e4 LT |
2857 | status = nfserr_stale_stateid; |
2858 | if (STALE_STATEID(stateid)) | |
2859 | goto out; | |
2860 | ||
1da177e4 | 2861 | status = nfserr_bad_stateid; |
3e633079 | 2862 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2863 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 2864 | if (!dp) |
1da177e4 | 2865 | goto out; |
6668958f AA |
2866 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2867 | flags); | |
0c2a498f BF |
2868 | if (status) |
2869 | goto out; | |
dc9bf700 BF |
2870 | status = nfs4_check_delegmode(dp, flags); |
2871 | if (status) | |
2872 | goto out; | |
2873 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2874 | if (filpp) |
2875 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2876 | } else { /* open or lock stateid */ |
a4455be0 | 2877 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 2878 | if (!stp) |
1da177e4 | 2879 | goto out; |
6150ef0d | 2880 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2881 | goto out; |
2882 | if (!stp->st_stateowner->so_confirmed) | |
2883 | goto out; | |
6668958f AA |
2884 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2885 | flags); | |
0c2a498f BF |
2886 | if (status) |
2887 | goto out; | |
a4455be0 BF |
2888 | status = nfs4_check_openmode(stp, flags); |
2889 | if (status) | |
1da177e4 LT |
2890 | goto out; |
2891 | renew_client(stp->st_stateowner->so_client); | |
2892 | if (filpp) | |
2893 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2894 | } |
2895 | status = nfs_ok; | |
2896 | out: | |
2897 | return status; | |
2898 | } | |
2899 | ||
4c4cd222 N |
2900 | static inline int |
2901 | setlkflg (int type) | |
2902 | { | |
2903 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2904 | RD_STATE : WR_STATE; | |
2905 | } | |
1da177e4 LT |
2906 | |
2907 | /* | |
2908 | * Checks for sequence id mutating operations. | |
2909 | */ | |
b37ad28b | 2910 | static __be32 |
dd453dfd BH |
2911 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2912 | stateid_t *stateid, int flags, | |
2913 | struct nfs4_stateowner **sopp, | |
2914 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2915 | { |
1da177e4 LT |
2916 | struct nfs4_stateid *stp; |
2917 | struct nfs4_stateowner *sop; | |
dd453dfd | 2918 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2919 | __be32 status; |
1da177e4 | 2920 | |
8c10cbdb BH |
2921 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2922 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2923 | |
1da177e4 LT |
2924 | *stpp = NULL; |
2925 | *sopp = NULL; | |
2926 | ||
1da177e4 | 2927 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2928 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2929 | return nfserr_bad_stateid; |
1da177e4 LT |
2930 | } |
2931 | ||
1da177e4 | 2932 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2933 | return nfserr_stale_stateid; |
6668958f AA |
2934 | |
2935 | if (nfsd4_has_session(cstate)) | |
2936 | flags |= HAS_SESSION; | |
2937 | ||
1da177e4 LT |
2938 | /* |
2939 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2940 | * the confirmed flag is incorrecly set, or the generation | |
2941 | * number is incorrect. | |
1da177e4 | 2942 | */ |
f8816512 N |
2943 | stp = find_stateid(stateid, flags); |
2944 | if (stp == NULL) { | |
2945 | /* | |
2946 | * Also, we should make sure this isn't just the result of | |
2947 | * a replayed close: | |
2948 | */ | |
2949 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2950 | if (sop == NULL) | |
e4e83ea4 | 2951 | return nfserr_bad_stateid; |
f8816512 N |
2952 | *sopp = sop; |
2953 | goto check_replay; | |
2954 | } | |
1da177e4 | 2955 | |
39325bd0 BF |
2956 | *stpp = stp; |
2957 | *sopp = sop = stp->st_stateowner; | |
2958 | ||
4c4cd222 | 2959 | if (lock) { |
4c4cd222 | 2960 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2961 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2962 | int lkflg = 0; |
b37ad28b | 2963 | __be32 status; |
4c4cd222 N |
2964 | |
2965 | lkflg = setlkflg(lock->lk_type); | |
2966 | ||
2967 | if (lock->lk_is_new) { | |
599e0a22 BF |
2968 | if (!sop->so_is_open_owner) |
2969 | return nfserr_bad_stateid; | |
60adfc50 AA |
2970 | if (!(flags & HAS_SESSION) && |
2971 | !same_clid(&clp->cl_clientid, lockclid)) | |
2972 | return nfserr_bad_stateid; | |
599e0a22 BF |
2973 | /* stp is the open stateid */ |
2974 | status = nfs4_check_openmode(stp, lkflg); | |
2975 | if (status) | |
2976 | return status; | |
2977 | } else { | |
2978 | /* stp is the lock stateid */ | |
2979 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2980 | if (status) | |
2981 | return status; | |
4c4cd222 | 2982 | } |
1da177e4 LT |
2983 | } |
2984 | ||
f3362737 | 2985 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2986 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2987 | return nfserr_bad_stateid; |
1da177e4 LT |
2988 | } |
2989 | ||
1da177e4 LT |
2990 | /* |
2991 | * We now validate the seqid and stateid generation numbers. | |
2992 | * For the moment, we ignore the possibility of | |
2993 | * generation number wraparound. | |
2994 | */ | |
6668958f | 2995 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
2996 | goto check_replay; |
2997 | ||
3a4f98bb | 2998 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2999 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3000 | " unconfirmed stateowner!\n"); |
3001 | return nfserr_bad_stateid; | |
1da177e4 | 3002 | } |
3a4f98bb | 3003 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3004 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3005 | " confirmed yet!\n"); |
3006 | return nfserr_bad_stateid; | |
1da177e4 | 3007 | } |
6668958f | 3008 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3009 | if (status) |
3010 | return status; | |
52fd004e | 3011 | renew_client(sop->so_client); |
3a4f98bb | 3012 | return nfs_ok; |
1da177e4 | 3013 | |
1da177e4 | 3014 | check_replay: |
bd9aac52 | 3015 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3016 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3017 | /* indicate replay to calling function */ |
a90b061c | 3018 | return nfserr_replay_me; |
1da177e4 | 3019 | } |
2fdada03 | 3020 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3021 | sop->so_seqid, seqid); |
3022 | *sopp = NULL; | |
3023 | return nfserr_bad_seqid; | |
1da177e4 LT |
3024 | } |
3025 | ||
b37ad28b | 3026 | __be32 |
ca364317 | 3027 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3028 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3029 | { |
b37ad28b | 3030 | __be32 status; |
1da177e4 LT |
3031 | struct nfs4_stateowner *sop; |
3032 | struct nfs4_stateid *stp; | |
3033 | ||
3034 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3035 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3036 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3037 | |
ca364317 | 3038 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3039 | if (status) |
3040 | return status; | |
1da177e4 LT |
3041 | |
3042 | nfs4_lock_state(); | |
3043 | ||
dd453dfd | 3044 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3045 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3046 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3047 | &oc->oc_stateowner, &stp, NULL))) |
3048 | goto out; | |
3049 | ||
3050 | sop = oc->oc_stateowner; | |
3051 | sop->so_confirmed = 1; | |
3052 | update_stateid(&stp->st_stateid); | |
3053 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3054 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3055 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3056 | |
3057 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3058 | out: |
f2327d9a | 3059 | if (oc->oc_stateowner) { |
1da177e4 | 3060 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3061 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3062 | } |
1da177e4 LT |
3063 | nfs4_unlock_state(); |
3064 | return status; | |
3065 | } | |
3066 | ||
3067 | ||
3068 | /* | |
3069 | * unset all bits in union bitmap (bmap) that | |
3070 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3071 | */ | |
3072 | static void | |
3073 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3074 | { | |
3075 | int i; | |
3076 | for (i = 1; i < 4; i++) { | |
3077 | if ((i & access) != i) | |
3078 | __clear_bit(i, bmap); | |
3079 | } | |
3080 | } | |
3081 | ||
3082 | static void | |
3083 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3084 | { | |
3085 | int i; | |
3086 | for (i = 0; i < 4; i++) { | |
3087 | if ((i & deny) != i) | |
3088 | __clear_bit(i, bmap); | |
3089 | } | |
3090 | } | |
3091 | ||
b37ad28b | 3092 | __be32 |
ca364317 BF |
3093 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3094 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3095 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3096 | { |
b37ad28b | 3097 | __be32 status; |
1da177e4 LT |
3098 | struct nfs4_stateid *stp; |
3099 | unsigned int share_access; | |
3100 | ||
3101 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3102 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3103 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3104 | |
d87a8ade | 3105 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3106 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3107 | return nfserr_inval; |
3108 | ||
3109 | nfs4_lock_state(); | |
dd453dfd | 3110 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3111 | od->od_seqid, |
1da177e4 | 3112 | &od->od_stateid, |
f3362737 | 3113 | OPEN_STATE, |
1da177e4 LT |
3114 | &od->od_stateowner, &stp, NULL))) |
3115 | goto out; | |
3116 | ||
3117 | status = nfserr_inval; | |
3118 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3119 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3120 | stp->st_access_bmap, od->od_share_access); | |
3121 | goto out; | |
3122 | } | |
3123 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3124 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3125 | stp->st_deny_bmap, od->od_share_deny); | |
3126 | goto out; | |
3127 | } | |
3128 | set_access(&share_access, stp->st_access_bmap); | |
3129 | nfs4_file_downgrade(stp->st_vfs_file, | |
3130 | share_access & ~od->od_share_access); | |
3131 | ||
3132 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3133 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3134 | ||
3135 | update_stateid(&stp->st_stateid); | |
3136 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3137 | status = nfs_ok; | |
3138 | out: | |
f2327d9a | 3139 | if (od->od_stateowner) { |
1da177e4 | 3140 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3141 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3142 | } |
1da177e4 LT |
3143 | nfs4_unlock_state(); |
3144 | return status; | |
3145 | } | |
3146 | ||
3147 | /* | |
3148 | * nfs4_unlock_state() called after encode | |
3149 | */ | |
b37ad28b | 3150 | __be32 |
ca364317 | 3151 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3152 | struct nfsd4_close *close) |
1da177e4 | 3153 | { |
b37ad28b | 3154 | __be32 status; |
1da177e4 LT |
3155 | struct nfs4_stateid *stp; |
3156 | ||
3157 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3158 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3159 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3160 | |
3161 | nfs4_lock_state(); | |
3162 | /* check close_lru for replay */ | |
dd453dfd | 3163 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3164 | close->cl_seqid, |
1da177e4 | 3165 | &close->cl_stateid, |
f3362737 | 3166 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3167 | &close->cl_stateowner, &stp, NULL))) |
3168 | goto out; | |
1da177e4 LT |
3169 | status = nfs_ok; |
3170 | update_stateid(&stp->st_stateid); | |
3171 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3172 | ||
04ef5954 | 3173 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3174 | release_open_stateid(stp); |
04ef5954 BF |
3175 | |
3176 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3177 | * released by the laundromat service after the lease period | |
3178 | * to enable us to handle CLOSE replay | |
3179 | */ | |
3180 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3181 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3182 | out: |
f2327d9a | 3183 | if (close->cl_stateowner) { |
1da177e4 | 3184 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3185 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3186 | } |
1da177e4 LT |
3187 | nfs4_unlock_state(); |
3188 | return status; | |
3189 | } | |
3190 | ||
b37ad28b | 3191 | __be32 |
ca364317 BF |
3192 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3193 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3194 | { |
203a8c8e BF |
3195 | struct nfs4_delegation *dp; |
3196 | stateid_t *stateid = &dr->dr_stateid; | |
3197 | struct inode *inode; | |
b37ad28b | 3198 | __be32 status; |
6668958f | 3199 | int flags = 0; |
1da177e4 | 3200 | |
ca364317 | 3201 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3202 | return status; |
3203 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3204 | |
6668958f AA |
3205 | if (nfsd4_has_session(cstate)) |
3206 | flags |= HAS_SESSION; | |
1da177e4 | 3207 | nfs4_lock_state(); |
203a8c8e BF |
3208 | status = nfserr_bad_stateid; |
3209 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3210 | goto out; | |
3211 | status = nfserr_stale_stateid; | |
3212 | if (STALE_STATEID(stateid)) | |
3213 | goto out; | |
7e0f7cf5 | 3214 | status = nfserr_bad_stateid; |
203a8c8e BF |
3215 | if (!is_delegation_stateid(stateid)) |
3216 | goto out; | |
203a8c8e | 3217 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3218 | if (!dp) |
203a8c8e | 3219 | goto out; |
6668958f | 3220 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3221 | if (status) |
3222 | goto out; | |
3223 | renew_client(dp->dl_client); | |
3224 | ||
3225 | unhash_delegation(dp); | |
1da177e4 | 3226 | out: |
203a8c8e BF |
3227 | nfs4_unlock_state(); |
3228 | ||
1da177e4 LT |
3229 | return status; |
3230 | } | |
3231 | ||
3232 | ||
3233 | /* | |
3234 | * Lock owner state (byte-range locks) | |
3235 | */ | |
3236 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3237 | #define LOCK_HASH_BITS 8 | |
3238 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3239 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3240 | ||
87df4de8 BH |
3241 | static inline u64 |
3242 | end_offset(u64 start, u64 len) | |
3243 | { | |
3244 | u64 end; | |
3245 | ||
3246 | end = start + len; | |
3247 | return end >= start ? end: NFS4_MAX_UINT64; | |
3248 | } | |
3249 | ||
3250 | /* last octet in a range */ | |
3251 | static inline u64 | |
3252 | last_byte_offset(u64 start, u64 len) | |
3253 | { | |
3254 | u64 end; | |
3255 | ||
3256 | BUG_ON(!len); | |
3257 | end = start + len; | |
3258 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3259 | } | |
3260 | ||
1da177e4 LT |
3261 | #define lockownerid_hashval(id) \ |
3262 | ((id) & LOCK_HASH_MASK) | |
3263 | ||
3264 | static inline unsigned int | |
3265 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3266 | struct xdr_netobj *ownername) | |
3267 | { | |
3268 | return (file_hashval(inode) + cl_id | |
3269 | + opaque_hashval(ownername->data, ownername->len)) | |
3270 | & LOCK_HASH_MASK; | |
3271 | } | |
3272 | ||
3273 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3274 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3275 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3276 | ||
fd39ca9a | 3277 | static struct nfs4_stateid * |
1da177e4 LT |
3278 | find_stateid(stateid_t *stid, int flags) |
3279 | { | |
9346eff0 | 3280 | struct nfs4_stateid *local; |
1da177e4 LT |
3281 | u32 st_id = stid->si_stateownerid; |
3282 | u32 f_id = stid->si_fileid; | |
3283 | unsigned int hashval; | |
3284 | ||
3285 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3286 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3287 | hashval = stateid_hashval(st_id, f_id); |
3288 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3289 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3290 | (local->st_stateid.si_fileid == f_id)) | |
3291 | return local; | |
3292 | } | |
3293 | } | |
9346eff0 KK |
3294 | |
3295 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3296 | hashval = stateid_hashval(st_id, f_id); |
3297 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3298 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3299 | (local->st_stateid.si_fileid == f_id)) | |
3300 | return local; | |
3301 | } | |
849823c5 | 3302 | } |
1da177e4 LT |
3303 | return NULL; |
3304 | } | |
3305 | ||
3306 | static struct nfs4_delegation * | |
3307 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3308 | { | |
13cd2184 N |
3309 | struct nfs4_file *fp; |
3310 | struct nfs4_delegation *dl; | |
1da177e4 | 3311 | |
8c10cbdb BH |
3312 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3313 | STATEID_VAL(stid)); | |
1da177e4 | 3314 | |
1da177e4 | 3315 | fp = find_file(ino); |
13cd2184 N |
3316 | if (!fp) |
3317 | return NULL; | |
3318 | dl = find_delegation_file(fp, stid); | |
3319 | put_nfs4_file(fp); | |
3320 | return dl; | |
1da177e4 LT |
3321 | } |
3322 | ||
3323 | /* | |
3324 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3325 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3326 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3327 | * locking, this prevents us from being completely protocol-compliant. The | |
3328 | * real solution to this problem is to start using unsigned file offsets in | |
3329 | * the VFS, but this is a very deep change! | |
3330 | */ | |
3331 | static inline void | |
3332 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3333 | { | |
3334 | if (lock->fl_start < 0) | |
3335 | lock->fl_start = OFFSET_MAX; | |
3336 | if (lock->fl_end < 0) | |
3337 | lock->fl_end = OFFSET_MAX; | |
3338 | } | |
3339 | ||
d5b9026a N |
3340 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3341 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3342 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3343 | }; |
1da177e4 LT |
3344 | |
3345 | static inline void | |
3346 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3347 | { | |
d5b9026a N |
3348 | struct nfs4_stateowner *sop; |
3349 | unsigned int hval; | |
1da177e4 | 3350 | |
d5b9026a N |
3351 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3352 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3353 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3354 | kref_get(&sop->so_ref); |
3355 | deny->ld_sop = sop; | |
3356 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3357 | } else { |
3358 | deny->ld_sop = NULL; | |
3359 | deny->ld_clientid.cl_boot = 0; | |
3360 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3361 | } |
3362 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3363 | deny->ld_length = NFS4_MAX_UINT64; |
3364 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3365 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3366 | deny->ld_type = NFS4_READ_LT; | |
3367 | if (fl->fl_type != F_RDLCK) | |
3368 | deny->ld_type = NFS4_WRITE_LT; | |
3369 | } | |
3370 | ||
1da177e4 LT |
3371 | static struct nfs4_stateowner * |
3372 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3373 | struct xdr_netobj *owner) | |
3374 | { | |
3375 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3376 | struct nfs4_stateowner *op; | |
3377 | ||
3378 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3379 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3380 | return op; |
3381 | } | |
3382 | return NULL; | |
3383 | } | |
3384 | ||
3385 | /* | |
3386 | * Alloc a lock owner structure. | |
3387 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3388 | * occured. | |
3389 | * | |
3390 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3391 | */ |
3392 | ||
3393 | static struct nfs4_stateowner * | |
3394 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3395 | struct nfs4_stateowner *sop; | |
3396 | struct nfs4_replay *rp; | |
3397 | unsigned int idhashval; | |
3398 | ||
3399 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3400 | return NULL; | |
3401 | idhashval = lockownerid_hashval(current_ownerid); | |
3402 | INIT_LIST_HEAD(&sop->so_idhash); | |
3403 | INIT_LIST_HEAD(&sop->so_strhash); | |
3404 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3405 | INIT_LIST_HEAD(&sop->so_stateids); |
3406 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3407 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3408 | sop->so_time = 0; | |
3409 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3410 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3411 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3412 | sop->so_is_open_owner = 0; |
3413 | sop->so_id = current_ownerid++; | |
3414 | sop->so_client = clp; | |
b59e3c0e NB |
3415 | /* It is the openowner seqid that will be incremented in encode in the |
3416 | * case of new lockowners; so increment the lock seqid manually: */ | |
3417 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3418 | sop->so_confirmed = 1; |
3419 | rp = &sop->so_replay; | |
de1ae286 | 3420 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3421 | rp->rp_buflen = 0; |
3422 | rp->rp_buf = rp->rp_ibuf; | |
3423 | return sop; | |
3424 | } | |
3425 | ||
fd39ca9a | 3426 | static struct nfs4_stateid * |
1da177e4 LT |
3427 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3428 | { | |
3429 | struct nfs4_stateid *stp; | |
3430 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3431 | ||
5ac049ac N |
3432 | stp = nfs4_alloc_stateid(); |
3433 | if (stp == NULL) | |
1da177e4 LT |
3434 | goto out; |
3435 | INIT_LIST_HEAD(&stp->st_hash); | |
3436 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3437 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3438 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3439 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3440 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3441 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3442 | stp->st_stateowner = sop; |
13cd2184 | 3443 | get_nfs4_file(fp); |
1da177e4 | 3444 | stp->st_file = fp; |
e4e83ea4 | 3445 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3446 | stp->st_stateid.si_stateownerid = sop->so_id; |
3447 | stp->st_stateid.si_fileid = fp->fi_id; | |
3448 | stp->st_stateid.si_generation = 0; | |
3449 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3450 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3451 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3452 | stp->st_openstp = open_stp; |
1da177e4 LT |
3453 | |
3454 | out: | |
3455 | return stp; | |
3456 | } | |
3457 | ||
fd39ca9a | 3458 | static int |
1da177e4 LT |
3459 | check_lock_length(u64 offset, u64 length) |
3460 | { | |
87df4de8 | 3461 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3462 | LOFF_OVERFLOW(offset, length))); |
3463 | } | |
3464 | ||
3465 | /* | |
3466 | * LOCK operation | |
3467 | */ | |
b37ad28b | 3468 | __be32 |
ca364317 | 3469 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3470 | struct nfsd4_lock *lock) |
1da177e4 | 3471 | { |
3e9e3dbe | 3472 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3473 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3474 | struct nfs4_stateid *lock_stp; |
3475 | struct file *filp; | |
3476 | struct file_lock file_lock; | |
8dc7c311 | 3477 | struct file_lock conflock; |
b37ad28b | 3478 | __be32 status = 0; |
1da177e4 | 3479 | unsigned int strhashval; |
150b3934 | 3480 | unsigned int cmd; |
b8dd7b9a | 3481 | int err; |
1da177e4 LT |
3482 | |
3483 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3484 | (long long) lock->lk_offset, | |
3485 | (long long) lock->lk_length); | |
3486 | ||
1da177e4 LT |
3487 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3488 | return nfserr_inval; | |
3489 | ||
ca364317 | 3490 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3491 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3492 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3493 | return status; | |
3494 | } | |
3495 | ||
1da177e4 LT |
3496 | nfs4_lock_state(); |
3497 | ||
3498 | if (lock->lk_is_new) { | |
893f8770 N |
3499 | /* |
3500 | * Client indicates that this is a new lockowner. | |
3501 | * Use open owner and open stateid to create lock owner and | |
3502 | * lock stateid. | |
3503 | */ | |
1da177e4 LT |
3504 | struct nfs4_stateid *open_stp = NULL; |
3505 | struct nfs4_file *fp; | |
3506 | ||
3507 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3508 | if (!nfsd4_has_session(cstate) && |
3509 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3510 | goto out; |
1da177e4 | 3511 | |
1da177e4 | 3512 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3513 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3514 | lock->lk_new_open_seqid, |
3515 | &lock->lk_new_open_stateid, | |
f3362737 | 3516 | OPEN_STATE, |
3a65588a | 3517 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3518 | lock); |
37515177 | 3519 | if (status) |
1da177e4 | 3520 | goto out; |
3a65588a | 3521 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3522 | /* create lockowner and lock stateid */ |
3523 | fp = open_stp->st_file; | |
3524 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3525 | open_sop->so_client->cl_clientid.cl_id, | |
3526 | &lock->v.new.owner); | |
3e9e3dbe N |
3527 | /* XXX: Do we need to check for duplicate stateowners on |
3528 | * the same file, or should they just be allowed (and | |
3529 | * create new stateids)? */ | |
1da177e4 | 3530 | status = nfserr_resource; |
b59e3c0e NB |
3531 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3532 | open_sop->so_client, open_stp, lock); | |
3533 | if (lock_sop == NULL) | |
1da177e4 | 3534 | goto out; |
b59e3c0e | 3535 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3536 | if (lock_stp == NULL) |
1da177e4 | 3537 | goto out; |
1da177e4 LT |
3538 | } else { |
3539 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3540 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3541 | lock->lk_old_lock_seqid, |
3542 | &lock->lk_old_lock_stateid, | |
f3362737 | 3543 | LOCK_STATE, |
3a65588a | 3544 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3545 | if (status) |
3546 | goto out; | |
3a65588a | 3547 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3548 | } |
3a65588a | 3549 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3550 | filp = lock_stp->st_vfs_file; |
3551 | ||
0dd395dc | 3552 | status = nfserr_grace; |
af558e33 | 3553 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3554 | goto out; |
3555 | status = nfserr_no_grace; | |
af558e33 | 3556 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3557 | goto out; |
3558 | ||
1da177e4 LT |
3559 | locks_init_lock(&file_lock); |
3560 | switch (lock->lk_type) { | |
3561 | case NFS4_READ_LT: | |
3562 | case NFS4_READW_LT: | |
3563 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3564 | cmd = F_SETLK; |
1da177e4 LT |
3565 | break; |
3566 | case NFS4_WRITE_LT: | |
3567 | case NFS4_WRITEW_LT: | |
3568 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3569 | cmd = F_SETLK; |
1da177e4 LT |
3570 | break; |
3571 | default: | |
3572 | status = nfserr_inval; | |
3573 | goto out; | |
3574 | } | |
b59e3c0e | 3575 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3576 | file_lock.fl_pid = current->tgid; |
3577 | file_lock.fl_file = filp; | |
3578 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3579 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3580 | |
3581 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3582 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3583 | nfs4_transform_lock_offset(&file_lock); |
3584 | ||
3585 | /* | |
3586 | * Try to lock the file in the VFS. | |
3587 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3588 | */ | |
3589 | ||
fd85b817 | 3590 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3591 | switch (-err) { |
1da177e4 LT |
3592 | case 0: /* success! */ |
3593 | update_stateid(&lock_stp->st_stateid); | |
3594 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3595 | sizeof(stateid_t)); | |
b8dd7b9a | 3596 | status = 0; |
eb76b3fd AA |
3597 | break; |
3598 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3599 | status = nfserr_denied; | |
3600 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3601 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3602 | break; | |
1da177e4 LT |
3603 | case (EDEADLK): |
3604 | status = nfserr_deadlock; | |
eb76b3fd | 3605 | break; |
1da177e4 | 3606 | default: |
fd85b817 | 3607 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3608 | status = nfserr_resource; |
3609 | break; | |
1da177e4 | 3610 | } |
1da177e4 | 3611 | out: |
8a280510 | 3612 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3613 | release_lockowner(lock_sop); |
3a65588a BF |
3614 | if (lock->lk_replay_owner) { |
3615 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3616 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3617 | } |
1da177e4 LT |
3618 | nfs4_unlock_state(); |
3619 | return status; | |
3620 | } | |
3621 | ||
55ef1274 BF |
3622 | /* |
3623 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3624 | * so we do a temporary open here just to get an open file to pass to | |
3625 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3626 | * inode operation.) | |
3627 | */ | |
3628 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3629 | { | |
3630 | struct file *file; | |
3631 | int err; | |
3632 | ||
3633 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3634 | if (err) | |
3635 | return err; | |
3636 | err = vfs_test_lock(file, lock); | |
3637 | nfsd_close(file); | |
3638 | return err; | |
3639 | } | |
3640 | ||
1da177e4 LT |
3641 | /* |
3642 | * LOCKT operation | |
3643 | */ | |
b37ad28b | 3644 | __be32 |
ca364317 BF |
3645 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3646 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3647 | { |
3648 | struct inode *inode; | |
1da177e4 | 3649 | struct file_lock file_lock; |
fd85b817 | 3650 | int error; |
b37ad28b | 3651 | __be32 status; |
1da177e4 | 3652 | |
af558e33 | 3653 | if (locks_in_grace()) |
1da177e4 LT |
3654 | return nfserr_grace; |
3655 | ||
3656 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3657 | return nfserr_inval; | |
3658 | ||
3659 | lockt->lt_stateowner = NULL; | |
3660 | nfs4_lock_state(); | |
3661 | ||
3662 | status = nfserr_stale_clientid; | |
60adfc50 | 3663 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3664 | goto out; |
1da177e4 | 3665 | |
ca364317 | 3666 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3667 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3668 | if (status == nfserr_symlink) |
3669 | status = nfserr_inval; | |
3670 | goto out; | |
3671 | } | |
3672 | ||
ca364317 | 3673 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3674 | locks_init_lock(&file_lock); |
3675 | switch (lockt->lt_type) { | |
3676 | case NFS4_READ_LT: | |
3677 | case NFS4_READW_LT: | |
3678 | file_lock.fl_type = F_RDLCK; | |
3679 | break; | |
3680 | case NFS4_WRITE_LT: | |
3681 | case NFS4_WRITEW_LT: | |
3682 | file_lock.fl_type = F_WRLCK; | |
3683 | break; | |
3684 | default: | |
2fdada03 | 3685 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3686 | status = nfserr_inval; |
3687 | goto out; | |
3688 | } | |
3689 | ||
3690 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3691 | &lockt->lt_clientid, &lockt->lt_owner); | |
3692 | if (lockt->lt_stateowner) | |
3693 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3694 | file_lock.fl_pid = current->tgid; | |
3695 | file_lock.fl_flags = FL_POSIX; | |
3696 | ||
3697 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3698 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3699 | |
3700 | nfs4_transform_lock_offset(&file_lock); | |
3701 | ||
1da177e4 | 3702 | status = nfs_ok; |
55ef1274 | 3703 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3704 | if (error) { |
3705 | status = nfserrno(error); | |
3706 | goto out; | |
3707 | } | |
9d6a8c5c | 3708 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3709 | status = nfserr_denied; |
9d6a8c5c | 3710 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3711 | } |
3712 | out: | |
3713 | nfs4_unlock_state(); | |
3714 | return status; | |
3715 | } | |
3716 | ||
b37ad28b | 3717 | __be32 |
ca364317 | 3718 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3719 | struct nfsd4_locku *locku) |
1da177e4 LT |
3720 | { |
3721 | struct nfs4_stateid *stp; | |
3722 | struct file *filp = NULL; | |
3723 | struct file_lock file_lock; | |
b37ad28b | 3724 | __be32 status; |
b8dd7b9a | 3725 | int err; |
1da177e4 LT |
3726 | |
3727 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3728 | (long long) locku->lu_offset, | |
3729 | (long long) locku->lu_length); | |
3730 | ||
3731 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3732 | return nfserr_inval; | |
3733 | ||
3734 | nfs4_lock_state(); | |
3735 | ||
dd453dfd | 3736 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3737 | locku->lu_seqid, |
3738 | &locku->lu_stateid, | |
f3362737 | 3739 | LOCK_STATE, |
1da177e4 LT |
3740 | &locku->lu_stateowner, &stp, NULL))) |
3741 | goto out; | |
3742 | ||
3743 | filp = stp->st_vfs_file; | |
3744 | BUG_ON(!filp); | |
3745 | locks_init_lock(&file_lock); | |
3746 | file_lock.fl_type = F_UNLCK; | |
3747 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3748 | file_lock.fl_pid = current->tgid; | |
3749 | file_lock.fl_file = filp; | |
3750 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3751 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3752 | file_lock.fl_start = locku->lu_offset; |
3753 | ||
87df4de8 | 3754 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3755 | nfs4_transform_lock_offset(&file_lock); |
3756 | ||
3757 | /* | |
3758 | * Try to unlock the file in the VFS. | |
3759 | */ | |
fd85b817 | 3760 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3761 | if (err) { |
fd85b817 | 3762 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3763 | goto out_nfserr; |
3764 | } | |
3765 | /* | |
3766 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3767 | */ | |
3768 | update_stateid(&stp->st_stateid); | |
3769 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3770 | ||
3771 | out: | |
f2327d9a | 3772 | if (locku->lu_stateowner) { |
1da177e4 | 3773 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3774 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3775 | } |
1da177e4 LT |
3776 | nfs4_unlock_state(); |
3777 | return status; | |
3778 | ||
3779 | out_nfserr: | |
b8dd7b9a | 3780 | status = nfserrno(err); |
1da177e4 LT |
3781 | goto out; |
3782 | } | |
3783 | ||
3784 | /* | |
3785 | * returns | |
3786 | * 1: locks held by lockowner | |
3787 | * 0: no locks held by lockowner | |
3788 | */ | |
3789 | static int | |
3790 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3791 | { | |
3792 | struct file_lock **flpp; | |
7eaa36e2 | 3793 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3794 | int status = 0; |
3795 | ||
3796 | lock_kernel(); | |
3797 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3798 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3799 | status = 1; |
3800 | goto out; | |
796dadfd | 3801 | } |
1da177e4 LT |
3802 | } |
3803 | out: | |
3804 | unlock_kernel(); | |
3805 | return status; | |
3806 | } | |
3807 | ||
b37ad28b | 3808 | __be32 |
b591480b BF |
3809 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3810 | struct nfsd4_compound_state *cstate, | |
3811 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3812 | { |
3813 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3814 | struct nfs4_stateowner *sop; |
3815 | struct nfs4_stateid *stp; | |
1da177e4 | 3816 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3817 | struct list_head matches; |
3818 | int i; | |
b37ad28b | 3819 | __be32 status; |
1da177e4 LT |
3820 | |
3821 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3822 | clid->cl_boot, clid->cl_id); | |
3823 | ||
3824 | /* XXX check for lease expiration */ | |
3825 | ||
3826 | status = nfserr_stale_clientid; | |
849823c5 | 3827 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3828 | return status; |
1da177e4 LT |
3829 | |
3830 | nfs4_lock_state(); | |
3831 | ||
3e9e3dbe N |
3832 | status = nfserr_locks_held; |
3833 | /* XXX: we're doing a linear search through all the lockowners. | |
3834 | * Yipes! For now we'll just hope clients aren't really using | |
3835 | * release_lockowner much, but eventually we have to fix these | |
3836 | * data structures. */ | |
3837 | INIT_LIST_HEAD(&matches); | |
3838 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3839 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3840 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3841 | continue; |
3842 | list_for_each_entry(stp, &sop->so_stateids, | |
3843 | st_perstateowner) { | |
3844 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3845 | goto out; | |
3846 | /* Note: so_perclient unused for lockowners, | |
3847 | * so it's OK to fool with here. */ | |
3848 | list_add(&sop->so_perclient, &matches); | |
3849 | } | |
1da177e4 | 3850 | } |
3e9e3dbe N |
3851 | } |
3852 | /* Clients probably won't expect us to return with some (but not all) | |
3853 | * of the lockowner state released; so don't release any until all | |
3854 | * have been checked. */ | |
3855 | status = nfs_ok; | |
0fa822e4 N |
3856 | while (!list_empty(&matches)) { |
3857 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3858 | so_perclient); | |
3859 | /* unhash_stateowner deletes so_perclient only | |
3860 | * for openowners. */ | |
3861 | list_del(&sop->so_perclient); | |
f044ff83 | 3862 | release_lockowner(sop); |
1da177e4 LT |
3863 | } |
3864 | out: | |
3865 | nfs4_unlock_state(); | |
3866 | return status; | |
3867 | } | |
3868 | ||
3869 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3870 | alloc_reclaim(void) |
1da177e4 | 3871 | { |
a55370a3 | 3872 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3873 | } |
3874 | ||
c7b9a459 | 3875 | int |
a1bcecd2 | 3876 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3877 | { |
3878 | unsigned int strhashval = clientstr_hashval(name); | |
3879 | struct nfs4_client *clp; | |
3880 | ||
a1bcecd2 | 3881 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3882 | return clp ? 1 : 0; |
3883 | } | |
3884 | ||
1da177e4 LT |
3885 | /* |
3886 | * failure => all reset bets are off, nfserr_no_grace... | |
3887 | */ | |
190e4fbf N |
3888 | int |
3889 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3890 | { |
3891 | unsigned int strhashval; | |
3892 | struct nfs4_client_reclaim *crp = NULL; | |
3893 | ||
a55370a3 N |
3894 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3895 | crp = alloc_reclaim(); | |
1da177e4 LT |
3896 | if (!crp) |
3897 | return 0; | |
a55370a3 | 3898 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3899 | INIT_LIST_HEAD(&crp->cr_strhash); |
3900 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3901 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3902 | reclaim_str_hashtbl_size++; |
3903 | return 1; | |
3904 | } | |
3905 | ||
3906 | static void | |
3907 | nfs4_release_reclaim(void) | |
3908 | { | |
3909 | struct nfs4_client_reclaim *crp = NULL; | |
3910 | int i; | |
3911 | ||
1da177e4 LT |
3912 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3913 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3914 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3915 | struct nfs4_client_reclaim, cr_strhash); | |
3916 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3917 | kfree(crp); |
3918 | reclaim_str_hashtbl_size--; | |
3919 | } | |
3920 | } | |
3921 | BUG_ON(reclaim_str_hashtbl_size); | |
3922 | } | |
3923 | ||
3924 | /* | |
3925 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3926 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3927 | nfs4_find_reclaim_client(clientid_t *clid) |
3928 | { | |
3929 | unsigned int strhashval; | |
3930 | struct nfs4_client *clp; | |
3931 | struct nfs4_client_reclaim *crp = NULL; | |
3932 | ||
3933 | ||
3934 | /* find clientid in conf_id_hashtbl */ | |
3935 | clp = find_confirmed_client(clid); | |
3936 | if (clp == NULL) | |
3937 | return NULL; | |
3938 | ||
a55370a3 N |
3939 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3940 | clp->cl_name.len, clp->cl_name.data, | |
3941 | clp->cl_recdir); | |
1da177e4 LT |
3942 | |
3943 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3944 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3945 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3946 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3947 | return crp; |
3948 | } | |
3949 | } | |
3950 | return NULL; | |
3951 | } | |
3952 | ||
3953 | /* | |
3954 | * Called from OPEN. Look for clientid in reclaim list. | |
3955 | */ | |
b37ad28b | 3956 | __be32 |
1da177e4 LT |
3957 | nfs4_check_open_reclaim(clientid_t *clid) |
3958 | { | |
dfc83565 | 3959 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3960 | } |
3961 | ||
ac4d8ff2 | 3962 | /* initialization to perform at module load time: */ |
1da177e4 | 3963 | |
e8ff2a84 | 3964 | int |
ac4d8ff2 | 3965 | nfs4_state_init(void) |
1da177e4 | 3966 | { |
e8ff2a84 | 3967 | int i, status; |
1da177e4 | 3968 | |
e8ff2a84 BF |
3969 | status = nfsd4_init_slabs(); |
3970 | if (status) | |
3971 | return status; | |
1da177e4 LT |
3972 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3973 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3974 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3975 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3976 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3977 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3978 | } |
5282fd72 ME |
3979 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3980 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3981 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3982 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3983 | } | |
3984 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3985 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3986 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3987 | } | |
3988 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3989 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3990 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3991 | } | |
3992 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3993 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3994 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3995 | } | |
1da177e4 | 3996 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3997 | INIT_LIST_HEAD(&close_lru); |
3998 | INIT_LIST_HEAD(&client_lru); | |
3999 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4000 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4001 | return 0; |
ac4d8ff2 N |
4002 | } |
4003 | ||
190e4fbf N |
4004 | static void |
4005 | nfsd4_load_reboot_recovery_data(void) | |
4006 | { | |
4007 | int status; | |
4008 | ||
0964a3d3 N |
4009 | nfs4_lock_state(); |
4010 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4011 | status = nfsd4_recdir_load(); |
0964a3d3 | 4012 | nfs4_unlock_state(); |
190e4fbf N |
4013 | if (status) |
4014 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4015 | } | |
4016 | ||
c2f1a551 MS |
4017 | /* |
4018 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4019 | * client may quite reasonably hang on to a delegation as long as it has | |
4020 | * the inode cached. This becomes an obvious problem the first time a | |
4021 | * client's inode cache approaches the size of the server's total memory. | |
4022 | * | |
4023 | * For now we avoid this problem by imposing a hard limit on the number | |
4024 | * of delegations, which varies according to the server's memory size. | |
4025 | */ | |
4026 | static void | |
4027 | set_max_delegations(void) | |
4028 | { | |
4029 | /* | |
4030 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4031 | * estimates suggest that in the worst case (where every delegation | |
4032 | * is for a different inode), a delegation could take about 1.5K, | |
4033 | * giving a worst case usage of about 6% of memory. | |
4034 | */ | |
4035 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4036 | } | |
4037 | ||
ac4d8ff2 N |
4038 | /* initialization to perform when the nfsd service is started: */ |
4039 | ||
29ab23cc | 4040 | static int |
ac4d8ff2 N |
4041 | __nfs4_state_start(void) |
4042 | { | |
b5a1a81e BF |
4043 | int ret; |
4044 | ||
1da177e4 | 4045 | boot_time = get_seconds(); |
af558e33 | 4046 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4047 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4048 | nfsd4_grace); |
b5a1a81e BF |
4049 | ret = set_callback_cred(); |
4050 | if (ret) | |
4051 | return -ENOMEM; | |
58da282b | 4052 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4053 | if (laundry_wq == NULL) |
4054 | return -ENOMEM; | |
b5a1a81e BF |
4055 | ret = nfsd4_create_callback_queue(); |
4056 | if (ret) | |
4057 | goto out_free_laundry; | |
e46b498c | 4058 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4059 | set_max_delegations(); |
b5a1a81e BF |
4060 | return 0; |
4061 | out_free_laundry: | |
4062 | destroy_workqueue(laundry_wq); | |
4063 | return ret; | |
1da177e4 LT |
4064 | } |
4065 | ||
29ab23cc | 4066 | int |
76a3550e | 4067 | nfs4_state_start(void) |
1da177e4 | 4068 | { |
29ab23cc BF |
4069 | int ret; |
4070 | ||
1da177e4 | 4071 | if (nfs4_init) |
29ab23cc | 4072 | return 0; |
190e4fbf | 4073 | nfsd4_load_reboot_recovery_data(); |
29ab23cc BF |
4074 | ret = __nfs4_state_start(); |
4075 | if (ret) | |
4076 | return ret; | |
1da177e4 | 4077 | nfs4_init = 1; |
29ab23cc | 4078 | return 0; |
1da177e4 LT |
4079 | } |
4080 | ||
1da177e4 LT |
4081 | static void |
4082 | __nfs4_state_shutdown(void) | |
4083 | { | |
4084 | int i; | |
4085 | struct nfs4_client *clp = NULL; | |
4086 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4087 | struct list_head *pos, *next, reaplist; |
4088 | ||
1da177e4 LT |
4089 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4090 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4091 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4092 | expire_client(clp); | |
4093 | } | |
4094 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4095 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4096 | expire_client(clp); | |
4097 | } | |
4098 | } | |
4099 | INIT_LIST_HEAD(&reaplist); | |
4100 | spin_lock(&recall_lock); | |
4101 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4102 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4103 | list_move(&dp->dl_recall_lru, &reaplist); | |
4104 | } | |
4105 | spin_unlock(&recall_lock); | |
4106 | list_for_each_safe(pos, next, &reaplist) { | |
4107 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4108 | list_del_init(&dp->dl_recall_lru); | |
4109 | unhash_delegation(dp); | |
4110 | } | |
4111 | ||
190e4fbf | 4112 | nfsd4_shutdown_recdir(); |
1da177e4 | 4113 | nfs4_init = 0; |
1da177e4 LT |
4114 | } |
4115 | ||
4116 | void | |
4117 | nfs4_state_shutdown(void) | |
4118 | { | |
5e8d5c29 N |
4119 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4120 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4121 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4122 | nfs4_lock_state(); |
4123 | nfs4_release_reclaim(); | |
4124 | __nfs4_state_shutdown(); | |
b5a1a81e | 4125 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4126 | nfs4_unlock_state(); |
4127 | } | |
4128 | ||
3dd98a3b JL |
4129 | /* |
4130 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4131 | * accessed when nfsd is starting. | |
4132 | */ | |
0964a3d3 N |
4133 | static void |
4134 | nfs4_set_recdir(char *recdir) | |
4135 | { | |
0964a3d3 | 4136 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4137 | } |
4138 | ||
4139 | /* | |
4140 | * Change the NFSv4 recovery directory to recdir. | |
4141 | */ | |
4142 | int | |
4143 | nfs4_reset_recoverydir(char *recdir) | |
4144 | { | |
4145 | int status; | |
a63bb996 | 4146 | struct path path; |
0964a3d3 | 4147 | |
a63bb996 | 4148 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4149 | if (status) |
4150 | return status; | |
4151 | status = -ENOTDIR; | |
a63bb996 | 4152 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4153 | nfs4_set_recdir(recdir); |
4154 | status = 0; | |
4155 | } | |
a63bb996 | 4156 | path_put(&path); |
0964a3d3 N |
4157 | return status; |
4158 | } | |
4159 | ||
3dd98a3b JL |
4160 | char * |
4161 | nfs4_recoverydir(void) | |
4162 | { | |
4163 | return user_recovery_dirname; | |
4164 | } |