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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) |
4731030d | 460 | return nfserr_jukebox; |
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 | ||
4731030d | 545 | status = nfserr_jukebox; |
557ce264 AA |
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); | |
d7682988 BH |
717 | } |
718 | ||
84d38ac9 BH |
719 | /* must be called under the client_lock */ |
720 | static inline void | |
721 | unhash_client_locked(struct nfs4_client *clp) | |
722 | { | |
07cd4909 | 723 | mark_client_expired(clp); |
84d38ac9 BH |
724 | list_del(&clp->cl_lru); |
725 | while (!list_empty(&clp->cl_sessions)) { | |
726 | struct nfsd4_session *ses; | |
727 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
728 | se_perclnt); | |
729 | unhash_session(ses); | |
730 | nfsd4_put_session(ses); | |
731 | } | |
732 | } | |
733 | ||
1da177e4 LT |
734 | static void |
735 | expire_client(struct nfs4_client *clp) | |
736 | { | |
737 | struct nfs4_stateowner *sop; | |
738 | struct nfs4_delegation *dp; | |
1da177e4 LT |
739 | struct list_head reaplist; |
740 | ||
1da177e4 LT |
741 | INIT_LIST_HEAD(&reaplist); |
742 | spin_lock(&recall_lock); | |
ea1da636 N |
743 | while (!list_empty(&clp->cl_delegations)) { |
744 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
745 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
746 | dp->dl_flock); | |
ea1da636 | 747 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
748 | list_move(&dp->dl_recall_lru, &reaplist); |
749 | } | |
750 | spin_unlock(&recall_lock); | |
751 | while (!list_empty(&reaplist)) { | |
752 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
753 | list_del_init(&dp->dl_recall_lru); | |
754 | unhash_delegation(dp); | |
755 | } | |
ea1da636 N |
756 | while (!list_empty(&clp->cl_openowners)) { |
757 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 758 | release_openowner(sop); |
1da177e4 | 759 | } |
84d38ac9 BH |
760 | nfsd4_set_callback_client(clp, NULL); |
761 | if (clp->cl_cb_conn.cb_xprt) | |
762 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
763 | list_del(&clp->cl_idhash); |
764 | list_del(&clp->cl_strhash); | |
be1fdf6c | 765 | spin_lock(&client_lock); |
84d38ac9 | 766 | unhash_client_locked(clp); |
46583e25 BH |
767 | if (atomic_read(&clp->cl_refcount) == 0) |
768 | free_client(clp); | |
be1fdf6c | 769 | spin_unlock(&client_lock); |
1da177e4 LT |
770 | } |
771 | ||
35bba9a3 BF |
772 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
773 | { | |
774 | memcpy(target->cl_verifier.data, source->data, | |
775 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
776 | } |
777 | ||
35bba9a3 BF |
778 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
779 | { | |
1da177e4 LT |
780 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
781 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
782 | } | |
783 | ||
35bba9a3 BF |
784 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
785 | { | |
1da177e4 LT |
786 | target->cr_uid = source->cr_uid; |
787 | target->cr_gid = source->cr_gid; | |
788 | target->cr_group_info = source->cr_group_info; | |
789 | get_group_info(target->cr_group_info); | |
790 | } | |
791 | ||
35bba9a3 | 792 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 793 | { |
a55370a3 | 794 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
795 | } |
796 | ||
797 | static int | |
599e0a22 BF |
798 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
799 | { | |
800 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
801 | } |
802 | ||
803 | static int | |
599e0a22 BF |
804 | same_clid(clientid_t *cl1, clientid_t *cl2) |
805 | { | |
806 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
807 | } |
808 | ||
809 | /* XXX what about NGROUP */ | |
810 | static int | |
599e0a22 BF |
811 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
812 | { | |
813 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
814 | } |
815 | ||
5ec7b46c BF |
816 | static void gen_clid(struct nfs4_client *clp) |
817 | { | |
818 | static u32 current_clientid = 1; | |
819 | ||
1da177e4 LT |
820 | clp->cl_clientid.cl_boot = boot_time; |
821 | clp->cl_clientid.cl_id = current_clientid++; | |
822 | } | |
823 | ||
deda2faa BF |
824 | static void gen_confirm(struct nfs4_client *clp) |
825 | { | |
826 | static u32 i; | |
827 | u32 *p; | |
1da177e4 | 828 | |
1da177e4 | 829 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
830 | *p++ = get_seconds(); |
831 | *p++ = i++; | |
1da177e4 LT |
832 | } |
833 | ||
b09333c4 RL |
834 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
835 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
836 | { | |
837 | struct nfs4_client *clp; | |
838 | struct sockaddr *sa = svc_addr(rqstp); | |
839 | char *princ; | |
840 | ||
841 | clp = alloc_client(name); | |
842 | if (clp == NULL) | |
843 | return NULL; | |
844 | ||
845 | princ = svc_gss_principal(rqstp); | |
846 | if (princ) { | |
847 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
848 | if (clp->cl_principal == NULL) { | |
849 | free_client(clp); | |
850 | return NULL; | |
851 | } | |
852 | } | |
853 | ||
854 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 855 | atomic_set(&clp->cl_refcount, 0); |
2bf23875 | 856 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
857 | INIT_LIST_HEAD(&clp->cl_idhash); |
858 | INIT_LIST_HEAD(&clp->cl_strhash); | |
859 | INIT_LIST_HEAD(&clp->cl_openowners); | |
860 | INIT_LIST_HEAD(&clp->cl_delegations); | |
861 | INIT_LIST_HEAD(&clp->cl_sessions); | |
862 | INIT_LIST_HEAD(&clp->cl_lru); | |
07cd4909 | 863 | clp->cl_time = get_seconds(); |
b09333c4 RL |
864 | clear_bit(0, &clp->cl_cb_slot_busy); |
865 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
866 | copy_verf(clp, verf); | |
867 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
868 | clp->cl_flavor = rqstp->rq_flavor; | |
869 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
870 | gen_confirm(clp); | |
871 | ||
872 | return clp; | |
873 | } | |
874 | ||
35bba9a3 BF |
875 | static int check_name(struct xdr_netobj name) |
876 | { | |
1da177e4 LT |
877 | if (name.len == 0) |
878 | return 0; | |
879 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 880 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | return 1; | |
884 | } | |
885 | ||
fd39ca9a | 886 | static void |
1da177e4 LT |
887 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
888 | { | |
889 | unsigned int idhashval; | |
890 | ||
891 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
892 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
893 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 894 | renew_client(clp); |
1da177e4 LT |
895 | } |
896 | ||
fd39ca9a | 897 | static void |
1da177e4 LT |
898 | move_to_confirmed(struct nfs4_client *clp) |
899 | { | |
900 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
901 | unsigned int strhashval; | |
902 | ||
903 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 904 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 905 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 906 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
907 | renew_client(clp); |
908 | } | |
909 | ||
910 | static struct nfs4_client * | |
911 | find_confirmed_client(clientid_t *clid) | |
912 | { | |
913 | struct nfs4_client *clp; | |
914 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
915 | ||
916 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 917 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
918 | return clp; |
919 | } | |
920 | return NULL; | |
921 | } | |
922 | ||
923 | static struct nfs4_client * | |
924 | find_unconfirmed_client(clientid_t *clid) | |
925 | { | |
926 | struct nfs4_client *clp; | |
927 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
928 | ||
929 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 930 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
931 | return clp; |
932 | } | |
933 | return NULL; | |
934 | } | |
935 | ||
a1bcecd2 AA |
936 | /* |
937 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
938 | * parameter. Matching is based on the fact the at least one of the | |
939 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
940 | * | |
941 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
942 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
943 | * and SET_CLIENTID{,_CONFIRM} | |
944 | */ | |
945 | static inline int | |
946 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
947 | { | |
948 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
949 | return use_exchange_id == has_exchange_flags; | |
950 | } | |
951 | ||
28ce6054 | 952 | static struct nfs4_client * |
a1bcecd2 AA |
953 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
954 | bool use_exchange_id) | |
28ce6054 N |
955 | { |
956 | struct nfs4_client *clp; | |
957 | ||
958 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
959 | if (same_name(clp->cl_recdir, dname) && |
960 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
961 | return clp; |
962 | } | |
963 | return NULL; | |
964 | } | |
965 | ||
966 | static struct nfs4_client * | |
a1bcecd2 AA |
967 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
968 | bool use_exchange_id) | |
28ce6054 N |
969 | { |
970 | struct nfs4_client *clp; | |
971 | ||
972 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
973 | if (same_name(clp->cl_recdir, dname) && |
974 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
975 | return clp; |
976 | } | |
977 | return NULL; | |
978 | } | |
979 | ||
fd39ca9a | 980 | static void |
fbf4665f | 981 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 982 | { |
c237dc03 | 983 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
984 | unsigned short expected_family; |
985 | ||
986 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
987 | if (se->se_callback_netid_len == 3 && | |
988 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
989 | expected_family = AF_INET; | |
990 | else if (se->se_callback_netid_len == 4 && | |
991 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
992 | expected_family = AF_INET6; | |
993 | else | |
1da177e4 LT |
994 | goto out_err; |
995 | ||
aa9a4ec7 JL |
996 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
997 | se->se_callback_addr_len, | |
998 | (struct sockaddr *) &cb->cb_addr, | |
999 | sizeof(cb->cb_addr)); | |
1000 | ||
7077ecba | 1001 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 1002 | goto out_err; |
aa9a4ec7 | 1003 | |
fbf4665f JL |
1004 | if (cb->cb_addr.ss_family == AF_INET6) |
1005 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
1006 | ||
ab52ae6d | 1007 | cb->cb_minorversion = 0; |
1da177e4 LT |
1008 | cb->cb_prog = se->se_callback_prog; |
1009 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1010 | return; |
1011 | out_err: | |
aa9a4ec7 JL |
1012 | cb->cb_addr.ss_family = AF_UNSPEC; |
1013 | cb->cb_addrlen = 0; | |
849823c5 | 1014 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1015 | "will not receive delegations\n", |
1016 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1017 | ||
1da177e4 LT |
1018 | return; |
1019 | } | |
1020 | ||
074fe897 | 1021 | /* |
557ce264 | 1022 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1023 | */ |
074fe897 AA |
1024 | void |
1025 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1026 | { |
557ce264 AA |
1027 | struct nfsd4_slot *slot = resp->cstate.slot; |
1028 | unsigned int base; | |
074fe897 | 1029 | |
557ce264 | 1030 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1031 | |
557ce264 AA |
1032 | slot->sl_opcnt = resp->opcnt; |
1033 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1034 | |
bf864a31 | 1035 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1036 | slot->sl_datalen = 0; |
bf864a31 | 1037 | return; |
074fe897 | 1038 | } |
557ce264 AA |
1039 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1040 | base = (char *)resp->cstate.datap - | |
1041 | (char *)resp->xbuf->head[0].iov_base; | |
1042 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1043 | slot->sl_datalen)) | |
1044 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1045 | return; | |
074fe897 AA |
1046 | } |
1047 | ||
1048 | /* | |
abfabf8c AA |
1049 | * Encode the replay sequence operation from the slot values. |
1050 | * If cachethis is FALSE encode the uncached rep error on the next | |
1051 | * operation which sets resp->p and increments resp->opcnt for | |
1052 | * nfs4svc_encode_compoundres. | |
074fe897 | 1053 | * |
074fe897 | 1054 | */ |
abfabf8c AA |
1055 | static __be32 |
1056 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1057 | struct nfsd4_compoundres *resp) | |
074fe897 | 1058 | { |
abfabf8c AA |
1059 | struct nfsd4_op *op; |
1060 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1061 | |
abfabf8c | 1062 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1063 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1064 | |
abfabf8c AA |
1065 | /* Encode the replayed sequence operation */ |
1066 | op = &args->ops[resp->opcnt - 1]; | |
1067 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1068 | |
abfabf8c | 1069 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1070 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1071 | op = &args->ops[resp->opcnt++]; |
1072 | op->status = nfserr_retry_uncached_rep; | |
1073 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1074 | } |
abfabf8c | 1075 | return op->status; |
074fe897 AA |
1076 | } |
1077 | ||
1078 | /* | |
557ce264 AA |
1079 | * The sequence operation is not cached because we can use the slot and |
1080 | * session values. | |
074fe897 AA |
1081 | */ |
1082 | __be32 | |
bf864a31 AA |
1083 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1084 | struct nfsd4_sequence *seq) | |
074fe897 | 1085 | { |
557ce264 | 1086 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1087 | __be32 status; |
1088 | ||
557ce264 | 1089 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1090 | |
abfabf8c AA |
1091 | /* Either returns 0 or nfserr_retry_uncached */ |
1092 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1093 | if (status == nfserr_retry_uncached_rep) | |
1094 | return status; | |
074fe897 | 1095 | |
557ce264 AA |
1096 | /* The sequence operation has been encoded, cstate->datap set. */ |
1097 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1098 | |
557ce264 AA |
1099 | resp->opcnt = slot->sl_opcnt; |
1100 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1101 | status = slot->sl_status; | |
074fe897 AA |
1102 | |
1103 | return status; | |
1104 | } | |
1105 | ||
0733d213 AA |
1106 | /* |
1107 | * Set the exchange_id flags returned by the server. | |
1108 | */ | |
1109 | static void | |
1110 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1111 | { | |
1112 | /* pNFS is not supported */ | |
1113 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1114 | ||
1115 | /* Referrals are supported, Migration is not. */ | |
1116 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1117 | ||
1118 | /* set the wire flags to return to client. */ | |
1119 | clid->flags = new->cl_exchange_flags; | |
1120 | } | |
1121 | ||
069b6ad4 AA |
1122 | __be32 |
1123 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1124 | struct nfsd4_compound_state *cstate, | |
1125 | struct nfsd4_exchange_id *exid) | |
1126 | { | |
0733d213 AA |
1127 | struct nfs4_client *unconf, *conf, *new; |
1128 | int status; | |
1129 | unsigned int strhashval; | |
1130 | char dname[HEXDIR_LEN]; | |
363168b4 | 1131 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1132 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1133 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1134 | |
363168b4 | 1135 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1136 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1137 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1138 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1139 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1140 | |
1141 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1142 | return nfserr_inval; | |
1143 | ||
1144 | /* Currently only support SP4_NONE */ | |
1145 | switch (exid->spa_how) { | |
1146 | case SP4_NONE: | |
1147 | break; | |
1148 | case SP4_SSV: | |
1149 | return nfserr_encr_alg_unsupp; | |
1150 | default: | |
1151 | BUG(); /* checked by xdr code */ | |
1152 | case SP4_MACH_CRED: | |
1153 | return nfserr_serverfault; /* no excuse :-/ */ | |
1154 | } | |
1155 | ||
1156 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1157 | ||
1158 | if (status) | |
1159 | goto error; | |
1160 | ||
1161 | strhashval = clientstr_hashval(dname); | |
1162 | ||
1163 | nfs4_lock_state(); | |
1164 | status = nfs_ok; | |
1165 | ||
a1bcecd2 | 1166 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1167 | if (conf) { |
1168 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1169 | /* 18.35.4 case 8 */ | |
1170 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1171 | status = nfserr_not_same; | |
1172 | goto out; | |
1173 | } | |
1174 | /* Client reboot: destroy old state */ | |
1175 | expire_client(conf); | |
1176 | goto out_new; | |
1177 | } | |
1178 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1179 | /* 18.35.4 case 9 */ | |
1180 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1181 | status = nfserr_perm; | |
1182 | goto out; | |
1183 | } | |
1184 | expire_client(conf); | |
1185 | goto out_new; | |
1186 | } | |
0733d213 AA |
1187 | /* |
1188 | * Set bit when the owner id and verifier map to an already | |
1189 | * confirmed client id (18.35.3). | |
1190 | */ | |
1191 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1192 | ||
1193 | /* | |
1194 | * Falling into 18.35.4 case 2, possible router replay. | |
1195 | * Leave confirmed record intact and return same result. | |
1196 | */ | |
1197 | copy_verf(conf, &verf); | |
1198 | new = conf; | |
1199 | goto out_copy; | |
6ddbbbfe MS |
1200 | } |
1201 | ||
1202 | /* 18.35.4 case 7 */ | |
1203 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1204 | status = nfserr_noent; | |
1205 | goto out; | |
0733d213 AA |
1206 | } |
1207 | ||
a1bcecd2 | 1208 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1209 | if (unconf) { |
1210 | /* | |
1211 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1212 | * a new unconfirmed record should be generated regardless | |
1213 | * of whether any properties have changed. | |
1214 | */ | |
1215 | expire_client(unconf); | |
1216 | } | |
1217 | ||
1218 | out_new: | |
1219 | /* Normal case */ | |
b09333c4 | 1220 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1221 | if (new == NULL) { |
4731030d | 1222 | status = nfserr_jukebox; |
0733d213 AA |
1223 | goto out; |
1224 | } | |
1225 | ||
0733d213 | 1226 | gen_clid(new); |
0733d213 AA |
1227 | add_to_unconfirmed(new, strhashval); |
1228 | out_copy: | |
1229 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1230 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1231 | ||
38eb76a5 | 1232 | exid->seqid = 1; |
0733d213 AA |
1233 | nfsd4_set_ex_flags(new, exid); |
1234 | ||
1235 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1236 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1237 | status = nfs_ok; |
1238 | ||
1239 | out: | |
1240 | nfs4_unlock_state(); | |
1241 | error: | |
1242 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1243 | return status; | |
069b6ad4 AA |
1244 | } |
1245 | ||
b85d4c01 | 1246 | static int |
88e588d5 | 1247 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1248 | { |
88e588d5 AA |
1249 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1250 | slot_seqid); | |
b85d4c01 BH |
1251 | |
1252 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1253 | if (slot_inuse) { |
1254 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1255 | return nfserr_jukebox; |
1256 | else | |
1257 | return nfserr_seq_misordered; | |
1258 | } | |
1259 | /* Normal */ | |
88e588d5 | 1260 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1261 | return nfs_ok; |
1262 | /* Replay */ | |
88e588d5 | 1263 | if (seqid == slot_seqid) |
b85d4c01 BH |
1264 | return nfserr_replay_cache; |
1265 | /* Wraparound */ | |
88e588d5 | 1266 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1267 | return nfs_ok; |
1268 | /* Misordered replay or misordered new request */ | |
1269 | return nfserr_seq_misordered; | |
1270 | } | |
1271 | ||
49557cc7 AA |
1272 | /* |
1273 | * Cache the create session result into the create session single DRC | |
1274 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1275 | * Do this for solo or embedded create session operations. | |
1276 | */ | |
1277 | static void | |
1278 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1279 | struct nfsd4_clid_slot *slot, int nfserr) | |
1280 | { | |
1281 | slot->sl_status = nfserr; | |
1282 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1283 | } | |
1284 | ||
1285 | static __be32 | |
1286 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1287 | struct nfsd4_clid_slot *slot) | |
1288 | { | |
1289 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1290 | return slot->sl_status; | |
1291 | } | |
1292 | ||
069b6ad4 AA |
1293 | __be32 |
1294 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1295 | struct nfsd4_compound_state *cstate, | |
1296 | struct nfsd4_create_session *cr_ses) | |
1297 | { | |
363168b4 | 1298 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1299 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1300 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1301 | int status = 0; |
1302 | ||
1303 | nfs4_lock_state(); | |
1304 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1305 | conf = find_confirmed_client(&cr_ses->clientid); | |
1306 | ||
1307 | if (conf) { | |
49557cc7 AA |
1308 | cs_slot = &conf->cl_cs_slot; |
1309 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1310 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1311 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1312 | cs_slot->sl_seqid); |
38eb76a5 | 1313 | /* Return the cached reply status */ |
49557cc7 | 1314 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1315 | goto out; |
49557cc7 | 1316 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1317 | status = nfserr_seq_misordered; |
1318 | dprintk("Sequence misordered!\n"); | |
1319 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1320 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1321 | goto out; |
1322 | } | |
49557cc7 | 1323 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1324 | } else if (unconf) { |
1325 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1326 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1327 | status = nfserr_clid_inuse; |
1328 | goto out; | |
1329 | } | |
1330 | ||
49557cc7 AA |
1331 | cs_slot = &unconf->cl_cs_slot; |
1332 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1333 | if (status) { |
1334 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1335 | status = nfserr_seq_misordered; |
49557cc7 | 1336 | goto out_cache; |
ec6b5d7b AA |
1337 | } |
1338 | ||
49557cc7 | 1339 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1340 | move_to_confirmed(unconf); |
1341 | ||
38524ab3 | 1342 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
2bf23875 BF |
1343 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
1344 | svc_xprt_get(rqstp->rq_xprt); | |
38524ab3 AA |
1345 | rpc_copy_addr( |
1346 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1347 | sa); | |
1348 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1349 | unconf->cl_cb_conn.cb_minorversion = | |
1350 | cstate->minorversion; | |
1351 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1352 | unconf->cl_cb_seq_nr = 1; |
4b21d0de | 1353 | nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); |
38524ab3 | 1354 | } |
ec6b5d7b AA |
1355 | conf = unconf; |
1356 | } else { | |
1357 | status = nfserr_stale_clientid; | |
1358 | goto out; | |
1359 | } | |
1360 | ||
408b79bc BF |
1361 | /* |
1362 | * We do not support RDMA or persistent sessions | |
1363 | */ | |
1364 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1365 | cr_ses->flags &= ~SESSION4_RDMA; | |
1366 | ||
ec6b5d7b AA |
1367 | status = alloc_init_session(rqstp, conf, cr_ses); |
1368 | if (status) | |
1369 | goto out; | |
1370 | ||
ec6b5d7b AA |
1371 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1372 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1373 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1374 | |
49557cc7 AA |
1375 | out_cache: |
1376 | /* cache solo and embedded create sessions under the state lock */ | |
1377 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1378 | out: |
1379 | nfs4_unlock_state(); | |
1380 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1381 | return status; | |
069b6ad4 AA |
1382 | } |
1383 | ||
57716355 BF |
1384 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1385 | { | |
1386 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1387 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1388 | ||
1389 | return argp->opcnt == resp->opcnt; | |
1390 | } | |
1391 | ||
5d4cec2f BF |
1392 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1393 | { | |
1394 | if (!session) | |
1395 | return 0; | |
1396 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1397 | } | |
1398 | ||
069b6ad4 AA |
1399 | __be32 |
1400 | nfsd4_destroy_session(struct svc_rqst *r, | |
1401 | struct nfsd4_compound_state *cstate, | |
1402 | struct nfsd4_destroy_session *sessionid) | |
1403 | { | |
e10e0cfc BH |
1404 | struct nfsd4_session *ses; |
1405 | u32 status = nfserr_badsession; | |
1406 | ||
1407 | /* Notes: | |
1408 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1409 | * - Should we return nfserr_back_chan_busy if waiting for | |
1410 | * callbacks on to-be-destroyed session? | |
1411 | * - Do we need to clear any callback info from previous session? | |
1412 | */ | |
1413 | ||
5d4cec2f | 1414 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1415 | if (!nfsd4_last_compound_op(r)) |
1416 | return nfserr_not_only_op; | |
1417 | } | |
e10e0cfc | 1418 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1419 | spin_lock(&client_lock); |
e10e0cfc BH |
1420 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1421 | if (!ses) { | |
9089f1b4 | 1422 | spin_unlock(&client_lock); |
e10e0cfc BH |
1423 | goto out; |
1424 | } | |
1425 | ||
1426 | unhash_session(ses); | |
9089f1b4 | 1427 | spin_unlock(&client_lock); |
e10e0cfc | 1428 | |
ab707e15 | 1429 | nfs4_lock_state(); |
e10e0cfc | 1430 | /* wait for callbacks */ |
b5a1a81e | 1431 | nfsd4_set_callback_client(ses->se_client, NULL); |
ab707e15 | 1432 | nfs4_unlock_state(); |
e10e0cfc BH |
1433 | nfsd4_put_session(ses); |
1434 | status = nfs_ok; | |
1435 | out: | |
1436 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1437 | return status; | |
069b6ad4 AA |
1438 | } |
1439 | ||
1440 | __be32 | |
b85d4c01 | 1441 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1442 | struct nfsd4_compound_state *cstate, |
1443 | struct nfsd4_sequence *seq) | |
1444 | { | |
f9bb94c4 | 1445 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1446 | struct nfsd4_session *session; |
1447 | struct nfsd4_slot *slot; | |
1448 | int status; | |
1449 | ||
f9bb94c4 AA |
1450 | if (resp->opcnt != 1) |
1451 | return nfserr_sequence_pos; | |
1452 | ||
9089f1b4 | 1453 | spin_lock(&client_lock); |
b85d4c01 BH |
1454 | status = nfserr_badsession; |
1455 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1456 | if (!session) | |
1457 | goto out; | |
1458 | ||
1459 | status = nfserr_badslot; | |
6c18ba9f | 1460 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1461 | goto out; |
1462 | ||
557ce264 | 1463 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1464 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1465 | ||
a8dfdaeb AA |
1466 | /* We do not negotiate the number of slots yet, so set the |
1467 | * maxslots to the session maxreqs which is used to encode | |
1468 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1469 | seq->maxslots = session->se_fchannel.maxreqs; | |
1470 | ||
88e588d5 | 1471 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1472 | if (status == nfserr_replay_cache) { |
1473 | cstate->slot = slot; | |
1474 | cstate->session = session; | |
da3846a2 | 1475 | /* Return the cached reply status and set cstate->status |
557ce264 | 1476 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1477 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1478 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1479 | goto out; |
b85d4c01 BH |
1480 | } |
1481 | if (status) | |
1482 | goto out; | |
1483 | ||
1484 | /* Success! bump slot seqid */ | |
1485 | slot->sl_inuse = true; | |
1486 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1487 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1488 | |
1489 | cstate->slot = slot; | |
1490 | cstate->session = session; | |
1491 | ||
b85d4c01 | 1492 | out: |
26c0c75e | 1493 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1494 | if (cstate->session) { |
36acb66b | 1495 | nfsd4_get_session(cstate->session); |
d7682988 | 1496 | atomic_inc(&session->se_client->cl_refcount); |
aaf84eb9 | 1497 | } |
36acb66b | 1498 | spin_unlock(&client_lock); |
b85d4c01 BH |
1499 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1500 | return status; | |
069b6ad4 AA |
1501 | } |
1502 | ||
4dc6ec00 BF |
1503 | __be32 |
1504 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1505 | { | |
1506 | if (rc->rca_one_fs) { | |
1507 | if (!cstate->current_fh.fh_dentry) | |
1508 | return nfserr_nofilehandle; | |
1509 | /* | |
1510 | * We don't take advantage of the rca_one_fs case. | |
1511 | * That's OK, it's optional, we can safely ignore it. | |
1512 | */ | |
1513 | return nfs_ok; | |
1514 | } | |
1515 | nfs4_lock_state(); | |
1516 | if (is_client_expired(cstate->session->se_client)) { | |
1517 | nfs4_unlock_state(); | |
1518 | /* | |
1519 | * The following error isn't really legal. | |
1520 | * But we only get here if the client just explicitly | |
1521 | * destroyed the client. Surely it no longer cares what | |
1522 | * error it gets back on an operation for the dead | |
1523 | * client. | |
1524 | */ | |
1525 | return nfserr_stale_clientid; | |
1526 | } | |
1527 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1528 | nfs4_unlock_state(); | |
1529 | return nfs_ok; | |
1530 | } | |
1531 | ||
b37ad28b | 1532 | __be32 |
b591480b BF |
1533 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1534 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1535 | { |
363168b4 | 1536 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1537 | struct xdr_netobj clname = { |
1538 | .len = setclid->se_namelen, | |
1539 | .data = setclid->se_name, | |
1540 | }; | |
1541 | nfs4_verifier clverifier = setclid->se_verf; | |
1542 | unsigned int strhashval; | |
28ce6054 | 1543 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1544 | __be32 status; |
a55370a3 | 1545 | char dname[HEXDIR_LEN]; |
1da177e4 | 1546 | |
1da177e4 | 1547 | if (!check_name(clname)) |
73aea4ec | 1548 | return nfserr_inval; |
1da177e4 | 1549 | |
a55370a3 N |
1550 | status = nfs4_make_rec_clidname(dname, &clname); |
1551 | if (status) | |
73aea4ec | 1552 | return status; |
a55370a3 | 1553 | |
1da177e4 LT |
1554 | /* |
1555 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1556 | * We get here on a DRC miss. | |
1557 | */ | |
1558 | ||
a55370a3 | 1559 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1560 | |
1da177e4 | 1561 | nfs4_lock_state(); |
a1bcecd2 | 1562 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1563 | if (conf) { |
a186e767 | 1564 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1565 | status = nfserr_clid_inuse; |
026722c2 | 1566 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1567 | char addr_str[INET6_ADDRSTRLEN]; |
1568 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1569 | sizeof(addr_str)); | |
1570 | dprintk("NFSD: setclientid: string in use by client " | |
1571 | "at %s\n", addr_str); | |
1da177e4 LT |
1572 | goto out; |
1573 | } | |
1da177e4 | 1574 | } |
a186e767 BF |
1575 | /* |
1576 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1577 | * has a description of SETCLIENTID request processing consisting | |
1578 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1579 | */ | |
a1bcecd2 | 1580 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1581 | status = nfserr_resource; |
1582 | if (!conf) { | |
a186e767 BF |
1583 | /* |
1584 | * RFC 3530 14.2.33 CASE 4: | |
1585 | * placed first, because it is the normal case | |
1da177e4 LT |
1586 | */ |
1587 | if (unconf) | |
1588 | expire_client(unconf); | |
b09333c4 | 1589 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1590 | if (new == NULL) |
1da177e4 | 1591 | goto out; |
1da177e4 | 1592 | gen_clid(new); |
599e0a22 | 1593 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1594 | /* |
a186e767 BF |
1595 | * RFC 3530 14.2.33 CASE 1: |
1596 | * probable callback update | |
1da177e4 | 1597 | */ |
31f4a6c1 N |
1598 | if (unconf) { |
1599 | /* Note this is removing unconfirmed {*x***}, | |
1600 | * which is stronger than RFC recommended {vxc**}. | |
1601 | * This has the advantage that there is at most | |
1602 | * one {*x***} in either list at any time. | |
1603 | */ | |
1604 | expire_client(unconf); | |
1da177e4 | 1605 | } |
b09333c4 | 1606 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1607 | if (new == NULL) |
1da177e4 | 1608 | goto out; |
1da177e4 | 1609 | copy_clid(new, conf); |
1da177e4 LT |
1610 | } else if (!unconf) { |
1611 | /* | |
a186e767 BF |
1612 | * RFC 3530 14.2.33 CASE 2: |
1613 | * probable client reboot; state will be removed if | |
1614 | * confirmed. | |
1da177e4 | 1615 | */ |
b09333c4 | 1616 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1617 | if (new == NULL) |
1da177e4 | 1618 | goto out; |
1da177e4 | 1619 | gen_clid(new); |
49ba8781 | 1620 | } else { |
a186e767 BF |
1621 | /* |
1622 | * RFC 3530 14.2.33 CASE 3: | |
1623 | * probable client reboot; state will be removed if | |
1624 | * confirmed. | |
1da177e4 LT |
1625 | */ |
1626 | expire_client(unconf); | |
b09333c4 | 1627 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1628 | if (new == NULL) |
1da177e4 | 1629 | goto out; |
1da177e4 | 1630 | gen_clid(new); |
1da177e4 | 1631 | } |
fbf4665f | 1632 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1633 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1634 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1635 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1636 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1637 | status = nfs_ok; | |
1638 | out: | |
1639 | nfs4_unlock_state(); | |
1640 | return status; | |
1641 | } | |
1642 | ||
1643 | ||
1644 | /* | |
a186e767 BF |
1645 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1646 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1647 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1648 | */ |
b37ad28b | 1649 | __be32 |
b591480b BF |
1650 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1651 | struct nfsd4_compound_state *cstate, | |
1652 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1653 | { |
363168b4 | 1654 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1655 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1656 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1657 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1658 | __be32 status; |
1da177e4 LT |
1659 | |
1660 | if (STALE_CLIENTID(clid)) | |
1661 | return nfserr_stale_clientid; | |
1662 | /* | |
1663 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1664 | * We get here on a DRC miss. | |
1665 | */ | |
1666 | ||
1667 | nfs4_lock_state(); | |
21ab45a4 N |
1668 | |
1669 | conf = find_confirmed_client(clid); | |
1670 | unconf = find_unconfirmed_client(clid); | |
1671 | ||
1672 | status = nfserr_clid_inuse; | |
363168b4 | 1673 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1674 | goto out; |
363168b4 | 1675 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1676 | goto out; |
1677 | ||
a186e767 BF |
1678 | /* |
1679 | * section 14.2.34 of RFC 3530 has a description of | |
1680 | * SETCLIENTID_CONFIRM request processing consisting | |
1681 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1682 | */ | |
366e0c1d | 1683 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1684 | /* |
1685 | * RFC 3530 14.2.34 CASE 1: | |
1686 | * callback update | |
1687 | */ | |
599e0a22 | 1688 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1689 | status = nfserr_clid_inuse; |
1690 | else { | |
2bf23875 | 1691 | atomic_set(&conf->cl_cb_set, 0); |
4b21d0de | 1692 | nfsd4_probe_callback(conf, &unconf->cl_cb_conn); |
1a69c179 | 1693 | expire_client(unconf); |
1da177e4 | 1694 | status = nfs_ok; |
1a69c179 | 1695 | |
1da177e4 | 1696 | } |
f3aba4e5 | 1697 | } else if (conf && !unconf) { |
a186e767 BF |
1698 | /* |
1699 | * RFC 3530 14.2.34 CASE 2: | |
1700 | * probable retransmitted request; play it safe and | |
1701 | * do nothing. | |
7c79f737 | 1702 | */ |
599e0a22 | 1703 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1704 | status = nfserr_clid_inuse; |
21ab45a4 | 1705 | else |
1da177e4 | 1706 | status = nfs_ok; |
7c79f737 | 1707 | } else if (!conf && unconf |
599e0a22 | 1708 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1709 | /* |
1710 | * RFC 3530 14.2.34 CASE 3: | |
1711 | * Normal case; new or rebooted client: | |
7c79f737 | 1712 | */ |
599e0a22 | 1713 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1714 | status = nfserr_clid_inuse; |
1715 | } else { | |
1a69c179 N |
1716 | unsigned int hash = |
1717 | clientstr_hashval(unconf->cl_recdir); | |
1718 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1719 | hash, false); |
1a69c179 | 1720 | if (conf) { |
c7b9a459 | 1721 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1722 | expire_client(conf); |
1723 | } | |
1da177e4 | 1724 | move_to_confirmed(unconf); |
21ab45a4 | 1725 | conf = unconf; |
4b21d0de | 1726 | nfsd4_probe_callback(conf, &conf->cl_cb_conn); |
1a69c179 | 1727 | status = nfs_ok; |
1da177e4 | 1728 | } |
599e0a22 BF |
1729 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1730 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1731 | &confirm)))) { |
a186e767 BF |
1732 | /* |
1733 | * RFC 3530 14.2.34 CASE 4: | |
1734 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1735 | */ |
1da177e4 | 1736 | status = nfserr_stale_clientid; |
7c79f737 | 1737 | } else { |
08e8987c N |
1738 | /* check that we have hit one of the cases...*/ |
1739 | status = nfserr_clid_inuse; | |
1740 | } | |
1da177e4 | 1741 | out: |
1da177e4 LT |
1742 | nfs4_unlock_state(); |
1743 | return status; | |
1744 | } | |
1745 | ||
1da177e4 LT |
1746 | /* OPEN Share state helper functions */ |
1747 | static inline struct nfs4_file * | |
1748 | alloc_init_file(struct inode *ino) | |
1749 | { | |
1750 | struct nfs4_file *fp; | |
1751 | unsigned int hashval = file_hashval(ino); | |
1752 | ||
e60d4398 N |
1753 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1754 | if (fp) { | |
8b671b80 | 1755 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1756 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1757 | INIT_LIST_HEAD(&fp->fi_stateids); |
1758 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1759 | fp->fi_inode = igrab(ino); |
1760 | fp->fi_id = current_fileid++; | |
47f9940c | 1761 | fp->fi_had_conflict = false; |
47cee541 PE |
1762 | spin_lock(&recall_lock); |
1763 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
1764 | spin_unlock(&recall_lock); | |
1da177e4 LT |
1765 | return fp; |
1766 | } | |
1767 | return NULL; | |
1768 | } | |
1769 | ||
e60d4398 | 1770 | static void |
e18b890b | 1771 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1772 | { |
e60d4398 N |
1773 | if (*slab == NULL) |
1774 | return; | |
1a1d92c1 | 1775 | kmem_cache_destroy(*slab); |
e60d4398 | 1776 | *slab = NULL; |
1da177e4 LT |
1777 | } |
1778 | ||
e8ff2a84 | 1779 | void |
1da177e4 LT |
1780 | nfsd4_free_slabs(void) |
1781 | { | |
e60d4398 N |
1782 | nfsd4_free_slab(&stateowner_slab); |
1783 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1784 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1785 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1786 | } |
1da177e4 | 1787 | |
e60d4398 N |
1788 | static int |
1789 | nfsd4_init_slabs(void) | |
1790 | { | |
1791 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1792 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1793 | if (stateowner_slab == NULL) |
1794 | goto out_nomem; | |
1795 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1796 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1797 | if (file_slab == NULL) |
1798 | goto out_nomem; | |
5ac049ac | 1799 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1800 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1801 | if (stateid_slab == NULL) |
1802 | goto out_nomem; | |
5b2d21c1 | 1803 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1804 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1805 | if (deleg_slab == NULL) |
1806 | goto out_nomem; | |
e60d4398 N |
1807 | return 0; |
1808 | out_nomem: | |
1809 | nfsd4_free_slabs(); | |
1810 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1811 | return -ENOMEM; | |
1da177e4 LT |
1812 | } |
1813 | ||
1814 | void | |
1815 | nfs4_free_stateowner(struct kref *kref) | |
1816 | { | |
1817 | struct nfs4_stateowner *sop = | |
1818 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1819 | kfree(sop->so_owner.data); | |
1820 | kmem_cache_free(stateowner_slab, sop); | |
1821 | } | |
1822 | ||
1823 | static inline struct nfs4_stateowner * | |
1824 | alloc_stateowner(struct xdr_netobj *owner) | |
1825 | { | |
1826 | struct nfs4_stateowner *sop; | |
1827 | ||
1828 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1829 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1830 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1831 | sop->so_owner.len = owner->len; | |
1832 | kref_init(&sop->so_ref); | |
1833 | return sop; | |
1834 | } | |
1835 | kmem_cache_free(stateowner_slab, sop); | |
1836 | } | |
1837 | return NULL; | |
1838 | } | |
1839 | ||
1840 | static struct nfs4_stateowner * | |
1841 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1842 | struct nfs4_stateowner *sop; | |
1843 | struct nfs4_replay *rp; | |
1844 | unsigned int idhashval; | |
1845 | ||
1846 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1847 | return NULL; | |
1848 | idhashval = ownerid_hashval(current_ownerid); | |
1849 | INIT_LIST_HEAD(&sop->so_idhash); | |
1850 | INIT_LIST_HEAD(&sop->so_strhash); | |
1851 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1852 | INIT_LIST_HEAD(&sop->so_stateids); |
1853 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1854 | INIT_LIST_HEAD(&sop->so_close_lru); |
1855 | sop->so_time = 0; | |
1856 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1857 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1858 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1859 | sop->so_is_open_owner = 1; |
1860 | sop->so_id = current_ownerid++; | |
1861 | sop->so_client = clp; | |
1862 | sop->so_seqid = open->op_seqid; | |
1863 | sop->so_confirmed = 0; | |
1864 | rp = &sop->so_replay; | |
de1ae286 | 1865 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1866 | rp->rp_buflen = 0; |
1867 | rp->rp_buf = rp->rp_ibuf; | |
1868 | return sop; | |
1869 | } | |
1870 | ||
1da177e4 LT |
1871 | static inline void |
1872 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1873 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1874 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1875 | ||
1876 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1877 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1878 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1879 | INIT_LIST_HEAD(&stp->st_perfile); |
1880 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1881 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1882 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1883 | stp->st_stateowner = sop; |
13cd2184 | 1884 | get_nfs4_file(fp); |
1da177e4 | 1885 | stp->st_file = fp; |
e4e83ea4 | 1886 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
1887 | stp->st_stateid.si_stateownerid = sop->so_id; |
1888 | stp->st_stateid.si_fileid = fp->fi_id; | |
1889 | stp->st_stateid.si_generation = 0; | |
1890 | stp->st_access_bmap = 0; | |
1891 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1892 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1893 | &stp->st_access_bmap); | |
1da177e4 | 1894 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1895 | stp->st_openstp = NULL; |
1da177e4 LT |
1896 | } |
1897 | ||
fd39ca9a | 1898 | static void |
1da177e4 LT |
1899 | move_to_close_lru(struct nfs4_stateowner *sop) |
1900 | { | |
1901 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1902 | ||
358dd55a | 1903 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1904 | sop->so_time = get_seconds(); |
1905 | } | |
1906 | ||
1da177e4 | 1907 | static int |
599e0a22 BF |
1908 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1909 | clientid_t *clid) | |
1910 | { | |
1911 | return (sop->so_owner.len == owner->len) && | |
1912 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1913 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | static struct nfs4_stateowner * | |
1917 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1918 | { | |
1919 | struct nfs4_stateowner *so = NULL; | |
1920 | ||
1921 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1922 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1923 | return so; |
1924 | } | |
1925 | return NULL; | |
1926 | } | |
1927 | ||
1928 | /* search file_hashtbl[] for file */ | |
1929 | static struct nfs4_file * | |
1930 | find_file(struct inode *ino) | |
1931 | { | |
1932 | unsigned int hashval = file_hashval(ino); | |
1933 | struct nfs4_file *fp; | |
1934 | ||
8b671b80 | 1935 | spin_lock(&recall_lock); |
1da177e4 | 1936 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1937 | if (fp->fi_inode == ino) { |
1938 | get_nfs4_file(fp); | |
8b671b80 | 1939 | spin_unlock(&recall_lock); |
1da177e4 | 1940 | return fp; |
13cd2184 | 1941 | } |
1da177e4 | 1942 | } |
8b671b80 | 1943 | spin_unlock(&recall_lock); |
1da177e4 LT |
1944 | return NULL; |
1945 | } | |
1946 | ||
d87a8ade | 1947 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1948 | { |
d87a8ade | 1949 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1950 | return 0; |
d87a8ade AA |
1951 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1952 | return 0; | |
1953 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1954 | if (minorversion && x) { | |
1955 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1956 | return 0; | |
1957 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1958 | return 0; | |
1959 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1960 | } | |
1961 | if (x) | |
8838dc43 BF |
1962 | return 0; |
1963 | return 1; | |
ba5a6a19 BF |
1964 | } |
1965 | ||
8838dc43 | 1966 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1967 | { |
8838dc43 BF |
1968 | /* Note: unlike access bits, deny bits may be zero. */ |
1969 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1970 | } |
1da177e4 | 1971 | |
4f83aa30 BF |
1972 | /* |
1973 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1974 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1975 | * only what share bits are currently in force, but also what | |
1976 | * combinations of share bits previous opens have used. This allows us | |
1977 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1978 | * return an error if the client attempt to downgrade to a combination | |
1979 | * of share bits not explicable by closing some of its previous opens. | |
1980 | * | |
1981 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1982 | * track of access/deny bit combinations; so, e.g., we allow: | |
1983 | * | |
1984 | * OPEN allow read, deny write | |
1985 | * OPEN allow both, deny none | |
1986 | * DOWNGRADE allow read, deny none | |
1987 | * | |
1988 | * which we should reject. | |
1989 | */ | |
fd39ca9a | 1990 | static void |
1da177e4 LT |
1991 | set_access(unsigned int *access, unsigned long bmap) { |
1992 | int i; | |
1993 | ||
1994 | *access = 0; | |
1995 | for (i = 1; i < 4; i++) { | |
1996 | if (test_bit(i, &bmap)) | |
1997 | *access |= i; | |
1998 | } | |
1999 | } | |
2000 | ||
fd39ca9a | 2001 | static void |
1da177e4 LT |
2002 | set_deny(unsigned int *deny, unsigned long bmap) { |
2003 | int i; | |
2004 | ||
2005 | *deny = 0; | |
2006 | for (i = 0; i < 4; i++) { | |
2007 | if (test_bit(i, &bmap)) | |
2008 | *deny |= i ; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | static int | |
2013 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
2014 | unsigned int access, deny; | |
2015 | ||
2016 | set_access(&access, stp->st_access_bmap); | |
2017 | set_deny(&deny, stp->st_deny_bmap); | |
2018 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
2019 | return 0; | |
2020 | return 1; | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * Called to check deny when READ with all zero stateid or | |
2025 | * WRITE with all zero or all one stateid | |
2026 | */ | |
b37ad28b | 2027 | static __be32 |
1da177e4 LT |
2028 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2029 | { | |
2030 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2031 | struct nfs4_file *fp; | |
2032 | struct nfs4_stateid *stp; | |
b37ad28b | 2033 | __be32 ret; |
1da177e4 LT |
2034 | |
2035 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2036 | ||
2037 | fp = find_file(ino); | |
13cd2184 N |
2038 | if (!fp) |
2039 | return nfs_ok; | |
b700949b | 2040 | ret = nfserr_locked; |
1da177e4 | 2041 | /* Search for conflicting share reservations */ |
13cd2184 N |
2042 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2043 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2044 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2045 | goto out; | |
1da177e4 | 2046 | } |
13cd2184 N |
2047 | ret = nfs_ok; |
2048 | out: | |
2049 | put_nfs4_file(fp); | |
2050 | return ret; | |
1da177e4 LT |
2051 | } |
2052 | ||
2053 | static inline void | |
2054 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2055 | { | |
2056 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2057 | drop_file_write_access(filp); |
42e49608 | 2058 | spin_lock(&filp->f_lock); |
1da177e4 | 2059 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
42e49608 | 2060 | spin_unlock(&filp->f_lock); |
1da177e4 LT |
2061 | } |
2062 | } | |
2063 | ||
1da177e4 LT |
2064 | /* |
2065 | * Spawn a thread to perform a recall on the delegation represented | |
2066 | * by the lease (file_lock) | |
2067 | * | |
2068 | * Called from break_lease() with lock_kernel() held. | |
2069 | * Note: we assume break_lease will only call this *once* for any given | |
2070 | * lease. | |
2071 | */ | |
2072 | static | |
2073 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2074 | { | |
63e4863f | 2075 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2076 | |
2077 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2078 | if (!dp) | |
2079 | return; | |
2080 | ||
2081 | /* We're assuming the state code never drops its reference | |
2082 | * without first removing the lease. Since we're in this lease | |
2083 | * callback (and since the lease code is serialized by the kernel | |
2084 | * lock) we know the server hasn't removed the lease yet, we know | |
2085 | * it's safe to take a reference: */ | |
2086 | atomic_inc(&dp->dl_count); | |
2087 | ||
2088 | spin_lock(&recall_lock); | |
2089 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2090 | spin_unlock(&recall_lock); | |
2091 | ||
2092 | /* only place dl_time is set. protected by lock_kernel*/ | |
2093 | dp->dl_time = get_seconds(); | |
2094 | ||
0272e1fd BF |
2095 | /* |
2096 | * We don't want the locks code to timeout the lease for us; | |
2097 | * we'll remove it ourself if the delegation isn't returned | |
2098 | * in time. | |
2099 | */ | |
2100 | fl->fl_break_time = 0; | |
1da177e4 | 2101 | |
63e4863f BF |
2102 | dp->dl_file->fi_had_conflict = true; |
2103 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2104 | } |
2105 | ||
2106 | /* | |
2107 | * The file_lock is being reapd. | |
2108 | * | |
2109 | * Called by locks_free_lock() with lock_kernel() held. | |
2110 | */ | |
2111 | static | |
2112 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2113 | { | |
2114 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2115 | ||
2116 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2117 | ||
2118 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2119 | return; | |
2120 | dp->dl_flock = NULL; | |
2121 | } | |
2122 | ||
2123 | /* | |
2124 | * Set the delegation file_lock back pointer. | |
2125 | * | |
a9933cea | 2126 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2127 | */ |
2128 | static | |
2129 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2130 | { | |
2131 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2132 | ||
2133 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2134 | if (!dp) | |
2135 | return; | |
2136 | dp->dl_flock = new; | |
2137 | } | |
2138 | ||
2139 | /* | |
a9933cea | 2140 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2141 | */ |
2142 | static | |
2143 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2144 | { | |
2145 | struct nfs4_delegation *onlistd = | |
2146 | (struct nfs4_delegation *)onlist->fl_owner; | |
2147 | struct nfs4_delegation *tryd = | |
2148 | (struct nfs4_delegation *)try->fl_owner; | |
2149 | ||
2150 | if (onlist->fl_lmops != try->fl_lmops) | |
2151 | return 0; | |
2152 | ||
2153 | return onlistd->dl_client == tryd->dl_client; | |
2154 | } | |
2155 | ||
2156 | ||
2157 | static | |
2158 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2159 | { | |
2160 | if (arg & F_UNLCK) | |
2161 | return lease_modify(onlist, arg); | |
2162 | else | |
2163 | return -EAGAIN; | |
2164 | } | |
2165 | ||
7b021967 | 2166 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2167 | .fl_break = nfsd_break_deleg_cb, |
2168 | .fl_release_private = nfsd_release_deleg_cb, | |
2169 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2170 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2171 | .fl_change = nfsd_change_deleg_cb, | |
2172 | }; | |
2173 | ||
2174 | ||
b37ad28b | 2175 | __be32 |
6668958f AA |
2176 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2177 | struct nfsd4_open *open) | |
1da177e4 | 2178 | { |
1da177e4 LT |
2179 | clientid_t *clientid = &open->op_clientid; |
2180 | struct nfs4_client *clp = NULL; | |
2181 | unsigned int strhashval; | |
2182 | struct nfs4_stateowner *sop = NULL; | |
2183 | ||
1da177e4 | 2184 | if (!check_name(open->op_owner)) |
0f442aa2 | 2185 | return nfserr_inval; |
1da177e4 LT |
2186 | |
2187 | if (STALE_CLIENTID(&open->op_clientid)) | |
2188 | return nfserr_stale_clientid; | |
2189 | ||
2190 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2191 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2192 | open->op_stateowner = sop; |
2193 | if (!sop) { | |
2194 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2195 | clp = find_confirmed_client(clientid); |
2196 | if (clp == NULL) | |
0f442aa2 BF |
2197 | return nfserr_expired; |
2198 | goto renew; | |
1da177e4 | 2199 | } |
6668958f AA |
2200 | /* When sessions are used, skip open sequenceid processing */ |
2201 | if (nfsd4_has_session(cstate)) | |
2202 | goto renew; | |
0f442aa2 BF |
2203 | if (!sop->so_confirmed) { |
2204 | /* Replace unconfirmed owners without checking for replay. */ | |
2205 | clp = sop->so_client; | |
f044ff83 | 2206 | release_openowner(sop); |
0f442aa2 BF |
2207 | open->op_stateowner = NULL; |
2208 | goto renew; | |
2209 | } | |
2210 | if (open->op_seqid == sop->so_seqid - 1) { | |
2211 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2212 | return nfserr_replay_me; |
0f442aa2 BF |
2213 | /* The original OPEN failed so spectacularly |
2214 | * that we don't even have replay data saved! | |
2215 | * Therefore, we have no choice but to continue | |
2216 | * processing this OPEN; presumably, we'll | |
2217 | * fail again for the same reason. | |
2218 | */ | |
2219 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2220 | goto renew; | |
2221 | } | |
2222 | if (open->op_seqid != sop->so_seqid) | |
2223 | return nfserr_bad_seqid; | |
1da177e4 | 2224 | renew: |
0f442aa2 BF |
2225 | if (open->op_stateowner == NULL) { |
2226 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2227 | if (sop == NULL) | |
2228 | return nfserr_resource; | |
2229 | open->op_stateowner = sop; | |
2230 | } | |
2231 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2232 | renew_client(sop->so_client); |
0f442aa2 | 2233 | return nfs_ok; |
1da177e4 LT |
2234 | } |
2235 | ||
b37ad28b | 2236 | static inline __be32 |
4a6e43e6 N |
2237 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2238 | { | |
2239 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2240 | return nfserr_openmode; | |
2241 | else | |
2242 | return nfs_ok; | |
2243 | } | |
2244 | ||
52f4fb43 N |
2245 | static struct nfs4_delegation * |
2246 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2247 | { | |
2248 | struct nfs4_delegation *dp; | |
2249 | ||
ea1da636 | 2250 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2251 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2252 | return dp; | |
2253 | } | |
2254 | return NULL; | |
2255 | } | |
2256 | ||
24a0111e BF |
2257 | int share_access_to_flags(u32 share_access) |
2258 | { | |
2259 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2260 | ||
2261 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2262 | } | |
2263 | ||
b37ad28b | 2264 | static __be32 |
567d9829 N |
2265 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2266 | struct nfs4_delegation **dp) | |
2267 | { | |
2268 | int flags; | |
b37ad28b | 2269 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2270 | |
2271 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2272 | if (*dp == NULL) | |
c44c5eeb | 2273 | goto out; |
24a0111e | 2274 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2275 | status = nfs4_check_delegmode(*dp, flags); |
2276 | if (status) | |
2277 | *dp = NULL; | |
c44c5eeb N |
2278 | out: |
2279 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2280 | return nfs_ok; | |
2281 | if (status) | |
2282 | return status; | |
2283 | open->op_stateowner->so_confirmed = 1; | |
2284 | return nfs_ok; | |
567d9829 N |
2285 | } |
2286 | ||
b37ad28b | 2287 | static __be32 |
1da177e4 LT |
2288 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2289 | { | |
2290 | struct nfs4_stateid *local; | |
b37ad28b | 2291 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2292 | struct nfs4_stateowner *sop = open->op_stateowner; |
2293 | ||
8beefa24 | 2294 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2295 | /* ignore lock owners */ |
2296 | if (local->st_stateowner->so_is_open_owner == 0) | |
2297 | continue; | |
2298 | /* remember if we have seen this open owner */ | |
2299 | if (local->st_stateowner == sop) | |
2300 | *stpp = local; | |
2301 | /* check for conflicting share reservations */ | |
2302 | if (!test_share(local, open)) | |
2303 | goto out; | |
2304 | } | |
2305 | status = 0; | |
2306 | out: | |
2307 | return status; | |
2308 | } | |
2309 | ||
5ac049ac N |
2310 | static inline struct nfs4_stateid * |
2311 | nfs4_alloc_stateid(void) | |
2312 | { | |
2313 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2314 | } | |
2315 | ||
b37ad28b | 2316 | static __be32 |
1da177e4 | 2317 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2318 | struct nfs4_delegation *dp, |
1da177e4 LT |
2319 | struct svc_fh *cur_fh, int flags) |
2320 | { | |
2321 | struct nfs4_stateid *stp; | |
1da177e4 | 2322 | |
5ac049ac | 2323 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2324 | if (stp == NULL) |
2325 | return nfserr_resource; | |
2326 | ||
567d9829 N |
2327 | if (dp) { |
2328 | get_file(dp->dl_vfs_file); | |
2329 | stp->st_vfs_file = dp->dl_vfs_file; | |
2330 | } else { | |
b37ad28b | 2331 | __be32 status; |
567d9829 N |
2332 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2333 | &stp->st_vfs_file); | |
2334 | if (status) { | |
2335 | if (status == nfserr_dropit) | |
2336 | status = nfserr_jukebox; | |
5ac049ac | 2337 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2338 | return status; |
2339 | } | |
1da177e4 | 2340 | } |
1da177e4 LT |
2341 | *stpp = stp; |
2342 | return 0; | |
2343 | } | |
2344 | ||
b37ad28b | 2345 | static inline __be32 |
1da177e4 LT |
2346 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2347 | struct nfsd4_open *open) | |
2348 | { | |
2349 | struct iattr iattr = { | |
2350 | .ia_valid = ATTR_SIZE, | |
2351 | .ia_size = 0, | |
2352 | }; | |
2353 | if (!open->op_truncate) | |
2354 | return 0; | |
2355 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2356 | return nfserr_inval; |
1da177e4 LT |
2357 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2358 | } | |
2359 | ||
b37ad28b | 2360 | static __be32 |
1da177e4 LT |
2361 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2362 | { | |
2363 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2364 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2365 | unsigned int share_access, new_writer; |
24a0111e | 2366 | u32 op_share_access; |
b37ad28b | 2367 | __be32 status; |
1da177e4 LT |
2368 | |
2369 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2370 | new_writer = (~share_access) & open->op_share_access |
2371 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2372 | |
6c26d08f | 2373 | if (new_writer) { |
b37ad28b AV |
2374 | int err = get_write_access(inode); |
2375 | if (err) | |
2376 | return nfserrno(err); | |
e518f056 BH |
2377 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2378 | if (err) | |
2379 | return nfserrno(err); | |
2380 | file_take_write(filp); | |
6c26d08f | 2381 | } |
1da177e4 LT |
2382 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2383 | if (status) { | |
6c26d08f BF |
2384 | if (new_writer) |
2385 | put_write_access(inode); | |
1da177e4 LT |
2386 | return status; |
2387 | } | |
2388 | /* remember the open */ | |
24a0111e BF |
2389 | op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2390 | filp->f_mode |= op_share_access; | |
2391 | __set_bit(op_share_access, &stp->st_access_bmap); | |
b55e0ba1 | 2392 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2393 | |
2394 | return nfs_ok; | |
2395 | } | |
2396 | ||
2397 | ||
1da177e4 | 2398 | static void |
37515177 | 2399 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2400 | { |
37515177 N |
2401 | open->op_stateowner->so_confirmed = 1; |
2402 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2403 | } |
2404 | ||
2405 | /* | |
2406 | * Attempt to hand out a delegation. | |
2407 | */ | |
2408 | static void | |
2409 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2410 | { | |
2411 | struct nfs4_delegation *dp; | |
2412 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2413 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2414 | struct file_lock fl, *flp = &fl; |
2415 | int status, flag = 0; | |
2416 | ||
2417 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2418 | open->op_recall = 0; |
2419 | switch (open->op_claim_type) { | |
2420 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2421 | if (!cb_up) |
7b190fec N |
2422 | open->op_recall = 1; |
2423 | flag = open->op_delegate_type; | |
2424 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2425 | goto out; | |
2426 | break; | |
2427 | case NFS4_OPEN_CLAIM_NULL: | |
2428 | /* Let's not give out any delegations till everyone's | |
2429 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2430 | if (locks_in_grace()) |
7b190fec | 2431 | goto out; |
2bf23875 | 2432 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2433 | goto out; |
2434 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2435 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2436 | else | |
2437 | flag = NFS4_OPEN_DELEGATE_READ; | |
2438 | break; | |
2439 | default: | |
2440 | goto out; | |
2441 | } | |
1da177e4 LT |
2442 | |
2443 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2444 | if (dp == NULL) { | |
2445 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2446 | goto out; | |
2447 | } | |
2448 | locks_init_lock(&fl); | |
2449 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2450 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2451 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2452 | fl.fl_end = OFFSET_MAX; |
2453 | fl.fl_owner = (fl_owner_t)dp; | |
2454 | fl.fl_file = stp->st_vfs_file; | |
2455 | fl.fl_pid = current->tgid; | |
2456 | ||
a9933cea | 2457 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2458 | * the lock_manager callbacks fl_mylease and fl_change are used |
2459 | */ | |
9167f501 | 2460 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2461 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2462 | unhash_delegation(dp); |
1da177e4 LT |
2463 | flag = NFS4_OPEN_DELEGATE_NONE; |
2464 | goto out; | |
2465 | } | |
2466 | ||
2467 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2468 | ||
8c10cbdb BH |
2469 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2470 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2471 | out: |
7b190fec N |
2472 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2473 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2474 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2475 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2476 | open->op_delegate_type = flag; |
2477 | } | |
2478 | ||
2479 | /* | |
2480 | * called with nfs4_lock_state() held. | |
2481 | */ | |
b37ad28b | 2482 | __be32 |
1da177e4 LT |
2483 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2484 | { | |
6668958f | 2485 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2486 | struct nfs4_file *fp = NULL; |
2487 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2488 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2489 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2490 | __be32 status; |
1da177e4 LT |
2491 | |
2492 | status = nfserr_inval; | |
d87a8ade | 2493 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2494 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2495 | goto out; |
2496 | /* | |
2497 | * Lookup file; if found, lookup stateid and check open request, | |
2498 | * and check for delegations in the process of being recalled. | |
2499 | * If not found, create the nfs4_file struct | |
2500 | */ | |
2501 | fp = find_file(ino); | |
2502 | if (fp) { | |
2503 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2504 | goto out; | |
c44c5eeb N |
2505 | status = nfs4_check_deleg(fp, open, &dp); |
2506 | if (status) | |
2507 | goto out; | |
1da177e4 | 2508 | } else { |
c44c5eeb N |
2509 | status = nfserr_bad_stateid; |
2510 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2511 | goto out; | |
1da177e4 LT |
2512 | status = nfserr_resource; |
2513 | fp = alloc_init_file(ino); | |
2514 | if (fp == NULL) | |
2515 | goto out; | |
2516 | } | |
2517 | ||
2518 | /* | |
2519 | * OPEN the file, or upgrade an existing OPEN. | |
2520 | * If truncate fails, the OPEN fails. | |
2521 | */ | |
2522 | if (stp) { | |
2523 | /* Stateid was found, this is an OPEN upgrade */ | |
2524 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2525 | if (status) | |
2526 | goto out; | |
444c2c07 | 2527 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2528 | } else { |
2529 | /* Stateid was not found, this is a new OPEN */ | |
2530 | int flags = 0; | |
9ecb6a08 | 2531 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2532 | flags |= NFSD_MAY_READ; |
1da177e4 | 2533 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2534 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2535 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2536 | if (status) | |
1da177e4 LT |
2537 | goto out; |
2538 | init_stateid(stp, fp, open); | |
2539 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2540 | if (status) { | |
2283963f | 2541 | release_open_stateid(stp); |
1da177e4 LT |
2542 | goto out; |
2543 | } | |
6668958f AA |
2544 | if (nfsd4_has_session(&resp->cstate)) |
2545 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2546 | } |
2547 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2548 | ||
4dc6ec00 | 2549 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2550 | open->op_stateowner->so_confirmed = 1; |
2551 | ||
1da177e4 LT |
2552 | /* |
2553 | * Attempt to hand out a delegation. No error return, because the | |
2554 | * OPEN succeeds even if we fail. | |
2555 | */ | |
2556 | nfs4_open_delegation(current_fh, open, stp); | |
2557 | ||
2558 | status = nfs_ok; | |
2559 | ||
8c10cbdb BH |
2560 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2561 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2562 | out: |
13cd2184 N |
2563 | if (fp) |
2564 | put_nfs4_file(fp); | |
37515177 N |
2565 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2566 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2567 | /* |
2568 | * To finish the open response, we just need to set the rflags. | |
2569 | */ | |
2570 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2571 | if (!open->op_stateowner->so_confirmed && |
2572 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2573 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2574 | ||
2575 | return status; | |
2576 | } | |
2577 | ||
b37ad28b | 2578 | __be32 |
b591480b BF |
2579 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2580 | clientid_t *clid) | |
1da177e4 LT |
2581 | { |
2582 | struct nfs4_client *clp; | |
b37ad28b | 2583 | __be32 status; |
1da177e4 LT |
2584 | |
2585 | nfs4_lock_state(); | |
2586 | dprintk("process_renew(%08x/%08x): starting\n", | |
2587 | clid->cl_boot, clid->cl_id); | |
2588 | status = nfserr_stale_clientid; | |
2589 | if (STALE_CLIENTID(clid)) | |
2590 | goto out; | |
2591 | clp = find_confirmed_client(clid); | |
2592 | status = nfserr_expired; | |
2593 | if (clp == NULL) { | |
2594 | /* We assume the client took too long to RENEW. */ | |
2595 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2596 | goto out; | |
2597 | } | |
2598 | renew_client(clp); | |
2599 | status = nfserr_cb_path_down; | |
ea1da636 | 2600 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2601 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2602 | goto out; |
2603 | status = nfs_ok; | |
2604 | out: | |
2605 | nfs4_unlock_state(); | |
2606 | return status; | |
2607 | } | |
2608 | ||
af558e33 BF |
2609 | struct lock_manager nfsd4_manager = { |
2610 | }; | |
2611 | ||
a76b4319 | 2612 | static void |
af558e33 | 2613 | nfsd4_end_grace(void) |
a76b4319 N |
2614 | { |
2615 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2616 | nfsd4_recdir_purge_old(); |
af558e33 | 2617 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2618 | /* |
2619 | * Now that every NFSv4 client has had the chance to recover and | |
2620 | * to see the (possibly new, possibly shorter) lease time, we | |
2621 | * can safely set the next grace time to the current lease time: | |
2622 | */ | |
2623 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2624 | } |
2625 | ||
fd39ca9a | 2626 | static time_t |
1da177e4 LT |
2627 | nfs4_laundromat(void) |
2628 | { | |
2629 | struct nfs4_client *clp; | |
2630 | struct nfs4_stateowner *sop; | |
2631 | struct nfs4_delegation *dp; | |
2632 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2633 | time_t cutoff = get_seconds() - nfsd4_lease; |
2634 | time_t t, clientid_val = nfsd4_lease; | |
2635 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2636 | |
2637 | nfs4_lock_state(); | |
2638 | ||
2639 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2640 | if (locks_in_grace()) |
2641 | nfsd4_end_grace(); | |
36acb66b BH |
2642 | INIT_LIST_HEAD(&reaplist); |
2643 | spin_lock(&client_lock); | |
1da177e4 LT |
2644 | list_for_each_safe(pos, next, &client_lru) { |
2645 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2646 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2647 | t = clp->cl_time - cutoff; | |
2648 | if (clientid_val > t) | |
2649 | clientid_val = t; | |
2650 | break; | |
2651 | } | |
d7682988 BH |
2652 | if (atomic_read(&clp->cl_refcount)) { |
2653 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2654 | clp->cl_clientid.cl_id); | |
2655 | continue; | |
2656 | } | |
2657 | unhash_client_locked(clp); | |
2658 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2659 | } |
2660 | spin_unlock(&client_lock); | |
2661 | list_for_each_safe(pos, next, &reaplist) { | |
2662 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2663 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2664 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2665 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2666 | expire_client(clp); |
2667 | } | |
1da177e4 LT |
2668 | spin_lock(&recall_lock); |
2669 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2670 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2671 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2672 | u = dp->dl_time - cutoff; | |
2673 | if (test_val > u) | |
2674 | test_val = u; | |
2675 | break; | |
2676 | } | |
2677 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2678 | dp, dp->dl_flock); | |
2679 | list_move(&dp->dl_recall_lru, &reaplist); | |
2680 | } | |
2681 | spin_unlock(&recall_lock); | |
2682 | list_for_each_safe(pos, next, &reaplist) { | |
2683 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2684 | list_del_init(&dp->dl_recall_lru); | |
2685 | unhash_delegation(dp); | |
2686 | } | |
cf07d2ea | 2687 | test_val = nfsd4_lease; |
1da177e4 LT |
2688 | list_for_each_safe(pos, next, &close_lru) { |
2689 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2690 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2691 | u = sop->so_time - cutoff; | |
2692 | if (test_val > u) | |
2693 | test_val = u; | |
2694 | break; | |
2695 | } | |
2696 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2697 | sop->so_id); | |
f044ff83 | 2698 | release_openowner(sop); |
1da177e4 LT |
2699 | } |
2700 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2701 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2702 | nfs4_unlock_state(); | |
2703 | return clientid_val; | |
2704 | } | |
2705 | ||
a254b246 HH |
2706 | static struct workqueue_struct *laundry_wq; |
2707 | static void laundromat_main(struct work_struct *); | |
2708 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2709 | ||
2710 | static void | |
c4028958 | 2711 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2712 | { |
2713 | time_t t; | |
2714 | ||
2715 | t = nfs4_laundromat(); | |
2716 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2717 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2718 | } |
2719 | ||
fd39ca9a | 2720 | static struct nfs4_stateowner * |
f8816512 N |
2721 | search_close_lru(u32 st_id, int flags) |
2722 | { | |
1da177e4 LT |
2723 | struct nfs4_stateowner *local = NULL; |
2724 | ||
1da177e4 LT |
2725 | if (flags & CLOSE_STATE) { |
2726 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2727 | if (local->so_id == st_id) | |
2728 | return local; | |
2729 | } | |
2730 | } | |
2731 | return NULL; | |
2732 | } | |
2733 | ||
2734 | static inline int | |
2735 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2736 | { | |
7eaa36e2 | 2737 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2738 | } |
2739 | ||
2740 | static int | |
2741 | STALE_STATEID(stateid_t *stateid) | |
2742 | { | |
e4e83ea4 BF |
2743 | if (stateid->si_boot == boot_time) |
2744 | return 0; | |
2745 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 2746 | STATEID_VAL(stateid)); |
e4e83ea4 | 2747 | return 1; |
1da177e4 LT |
2748 | } |
2749 | ||
2750 | static inline int | |
2751 | access_permit_read(unsigned long access_bmap) | |
2752 | { | |
2753 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2754 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2755 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2756 | } | |
2757 | ||
2758 | static inline int | |
2759 | access_permit_write(unsigned long access_bmap) | |
2760 | { | |
2761 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2762 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2763 | } | |
2764 | ||
2765 | static | |
b37ad28b | 2766 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2767 | { |
b37ad28b | 2768 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2769 | |
2770 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2771 | goto out; | |
2772 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2773 | goto out; | |
2774 | status = nfs_ok; | |
2775 | out: | |
2776 | return status; | |
2777 | } | |
2778 | ||
b37ad28b | 2779 | static inline __be32 |
1da177e4 LT |
2780 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2781 | { | |
203a8c8e | 2782 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2783 | return nfs_ok; |
af558e33 | 2784 | else if (locks_in_grace()) { |
1da177e4 LT |
2785 | /* Answer in remaining cases depends on existance of |
2786 | * conflicting state; so we must wait out the grace period. */ | |
2787 | return nfserr_grace; | |
2788 | } else if (flags & WR_STATE) | |
2789 | return nfs4_share_conflict(current_fh, | |
2790 | NFS4_SHARE_DENY_WRITE); | |
2791 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2792 | return nfs4_share_conflict(current_fh, | |
2793 | NFS4_SHARE_DENY_READ); | |
2794 | } | |
2795 | ||
2796 | /* | |
2797 | * Allow READ/WRITE during grace period on recovered state only for files | |
2798 | * that are not able to provide mandatory locking. | |
2799 | */ | |
2800 | static inline int | |
18f82731 | 2801 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2802 | { |
203a8c8e | 2803 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2804 | } |
2805 | ||
6668958f | 2806 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2807 | { |
6668958f AA |
2808 | /* |
2809 | * When sessions are used the stateid generation number is ignored | |
2810 | * when it is zero. | |
2811 | */ | |
2812 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2813 | goto out; | |
2814 | ||
0836f587 BF |
2815 | /* If the client sends us a stateid from the future, it's buggy: */ |
2816 | if (in->si_generation > ref->si_generation) | |
2817 | return nfserr_bad_stateid; | |
2818 | /* | |
2819 | * The following, however, can happen. For example, if the | |
2820 | * client sends an open and some IO at the same time, the open | |
2821 | * may bump si_generation while the IO is still in flight. | |
2822 | * Thanks to hard links and renames, the client never knows what | |
2823 | * file an open will affect. So it could avoid that situation | |
2824 | * only by serializing all opens and IO from the same open | |
2825 | * owner. To recover from the old_stateid error, the client | |
2826 | * will just have to retry the IO: | |
2827 | */ | |
2828 | if (in->si_generation < ref->si_generation) | |
2829 | return nfserr_old_stateid; | |
6668958f | 2830 | out: |
0836f587 BF |
2831 | return nfs_ok; |
2832 | } | |
2833 | ||
3e633079 BF |
2834 | static int is_delegation_stateid(stateid_t *stateid) |
2835 | { | |
2836 | return stateid->si_fileid == 0; | |
2837 | } | |
2838 | ||
1da177e4 LT |
2839 | /* |
2840 | * Checks for stateid operations | |
2841 | */ | |
b37ad28b | 2842 | __be32 |
dd453dfd BH |
2843 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2844 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2845 | { |
2846 | struct nfs4_stateid *stp = NULL; | |
2847 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2848 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2849 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2850 | __be32 status; |
1da177e4 | 2851 | |
1da177e4 LT |
2852 | if (filpp) |
2853 | *filpp = NULL; | |
2854 | ||
18f82731 | 2855 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2856 | return nfserr_grace; |
2857 | ||
6668958f AA |
2858 | if (nfsd4_has_session(cstate)) |
2859 | flags |= HAS_SESSION; | |
2860 | ||
1da177e4 LT |
2861 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2862 | return check_special_stateids(current_fh, stateid, flags); | |
2863 | ||
1da177e4 LT |
2864 | status = nfserr_stale_stateid; |
2865 | if (STALE_STATEID(stateid)) | |
2866 | goto out; | |
2867 | ||
1da177e4 | 2868 | status = nfserr_bad_stateid; |
3e633079 | 2869 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2870 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 2871 | if (!dp) |
1da177e4 | 2872 | goto out; |
6668958f AA |
2873 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2874 | flags); | |
0c2a498f BF |
2875 | if (status) |
2876 | goto out; | |
dc9bf700 BF |
2877 | status = nfs4_check_delegmode(dp, flags); |
2878 | if (status) | |
2879 | goto out; | |
2880 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2881 | if (filpp) |
2882 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2883 | } else { /* open or lock stateid */ |
a4455be0 | 2884 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 2885 | if (!stp) |
1da177e4 | 2886 | goto out; |
6150ef0d | 2887 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2888 | goto out; |
2889 | if (!stp->st_stateowner->so_confirmed) | |
2890 | goto out; | |
6668958f AA |
2891 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2892 | flags); | |
0c2a498f BF |
2893 | if (status) |
2894 | goto out; | |
a4455be0 BF |
2895 | status = nfs4_check_openmode(stp, flags); |
2896 | if (status) | |
1da177e4 LT |
2897 | goto out; |
2898 | renew_client(stp->st_stateowner->so_client); | |
2899 | if (filpp) | |
2900 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2901 | } |
2902 | status = nfs_ok; | |
2903 | out: | |
2904 | return status; | |
2905 | } | |
2906 | ||
4c4cd222 N |
2907 | static inline int |
2908 | setlkflg (int type) | |
2909 | { | |
2910 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2911 | RD_STATE : WR_STATE; | |
2912 | } | |
1da177e4 LT |
2913 | |
2914 | /* | |
2915 | * Checks for sequence id mutating operations. | |
2916 | */ | |
b37ad28b | 2917 | static __be32 |
dd453dfd BH |
2918 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2919 | stateid_t *stateid, int flags, | |
2920 | struct nfs4_stateowner **sopp, | |
2921 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2922 | { |
1da177e4 LT |
2923 | struct nfs4_stateid *stp; |
2924 | struct nfs4_stateowner *sop; | |
dd453dfd | 2925 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2926 | __be32 status; |
1da177e4 | 2927 | |
8c10cbdb BH |
2928 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2929 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2930 | |
1da177e4 LT |
2931 | *stpp = NULL; |
2932 | *sopp = NULL; | |
2933 | ||
1da177e4 | 2934 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2935 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2936 | return nfserr_bad_stateid; |
1da177e4 LT |
2937 | } |
2938 | ||
1da177e4 | 2939 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2940 | return nfserr_stale_stateid; |
6668958f AA |
2941 | |
2942 | if (nfsd4_has_session(cstate)) | |
2943 | flags |= HAS_SESSION; | |
2944 | ||
1da177e4 LT |
2945 | /* |
2946 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2947 | * the confirmed flag is incorrecly set, or the generation | |
2948 | * number is incorrect. | |
1da177e4 | 2949 | */ |
f8816512 N |
2950 | stp = find_stateid(stateid, flags); |
2951 | if (stp == NULL) { | |
2952 | /* | |
2953 | * Also, we should make sure this isn't just the result of | |
2954 | * a replayed close: | |
2955 | */ | |
2956 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2957 | if (sop == NULL) | |
e4e83ea4 | 2958 | return nfserr_bad_stateid; |
f8816512 N |
2959 | *sopp = sop; |
2960 | goto check_replay; | |
2961 | } | |
1da177e4 | 2962 | |
39325bd0 BF |
2963 | *stpp = stp; |
2964 | *sopp = sop = stp->st_stateowner; | |
2965 | ||
4c4cd222 | 2966 | if (lock) { |
4c4cd222 | 2967 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2968 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2969 | int lkflg = 0; |
b37ad28b | 2970 | __be32 status; |
4c4cd222 N |
2971 | |
2972 | lkflg = setlkflg(lock->lk_type); | |
2973 | ||
2974 | if (lock->lk_is_new) { | |
599e0a22 BF |
2975 | if (!sop->so_is_open_owner) |
2976 | return nfserr_bad_stateid; | |
60adfc50 AA |
2977 | if (!(flags & HAS_SESSION) && |
2978 | !same_clid(&clp->cl_clientid, lockclid)) | |
2979 | return nfserr_bad_stateid; | |
599e0a22 BF |
2980 | /* stp is the open stateid */ |
2981 | status = nfs4_check_openmode(stp, lkflg); | |
2982 | if (status) | |
2983 | return status; | |
2984 | } else { | |
2985 | /* stp is the lock stateid */ | |
2986 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2987 | if (status) | |
2988 | return status; | |
4c4cd222 | 2989 | } |
1da177e4 LT |
2990 | } |
2991 | ||
f3362737 | 2992 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2993 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2994 | return nfserr_bad_stateid; |
1da177e4 LT |
2995 | } |
2996 | ||
1da177e4 LT |
2997 | /* |
2998 | * We now validate the seqid and stateid generation numbers. | |
2999 | * For the moment, we ignore the possibility of | |
3000 | * generation number wraparound. | |
3001 | */ | |
6668958f | 3002 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3003 | goto check_replay; |
3004 | ||
3a4f98bb | 3005 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3006 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3007 | " unconfirmed stateowner!\n"); |
3008 | return nfserr_bad_stateid; | |
1da177e4 | 3009 | } |
3a4f98bb | 3010 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3011 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3012 | " confirmed yet!\n"); |
3013 | return nfserr_bad_stateid; | |
1da177e4 | 3014 | } |
6668958f | 3015 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3016 | if (status) |
3017 | return status; | |
52fd004e | 3018 | renew_client(sop->so_client); |
3a4f98bb | 3019 | return nfs_ok; |
1da177e4 | 3020 | |
1da177e4 | 3021 | check_replay: |
bd9aac52 | 3022 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3023 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3024 | /* indicate replay to calling function */ |
a90b061c | 3025 | return nfserr_replay_me; |
1da177e4 | 3026 | } |
2fdada03 | 3027 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3028 | sop->so_seqid, seqid); |
3029 | *sopp = NULL; | |
3030 | return nfserr_bad_seqid; | |
1da177e4 LT |
3031 | } |
3032 | ||
b37ad28b | 3033 | __be32 |
ca364317 | 3034 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3035 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3036 | { |
b37ad28b | 3037 | __be32 status; |
1da177e4 LT |
3038 | struct nfs4_stateowner *sop; |
3039 | struct nfs4_stateid *stp; | |
3040 | ||
3041 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3042 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3043 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3044 | |
ca364317 | 3045 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3046 | if (status) |
3047 | return status; | |
1da177e4 LT |
3048 | |
3049 | nfs4_lock_state(); | |
3050 | ||
dd453dfd | 3051 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3052 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3053 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3054 | &oc->oc_stateowner, &stp, NULL))) |
3055 | goto out; | |
3056 | ||
3057 | sop = oc->oc_stateowner; | |
3058 | sop->so_confirmed = 1; | |
3059 | update_stateid(&stp->st_stateid); | |
3060 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3061 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3062 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3063 | |
3064 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3065 | out: |
f2327d9a | 3066 | if (oc->oc_stateowner) { |
1da177e4 | 3067 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3068 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3069 | } |
1da177e4 LT |
3070 | nfs4_unlock_state(); |
3071 | return status; | |
3072 | } | |
3073 | ||
3074 | ||
3075 | /* | |
3076 | * unset all bits in union bitmap (bmap) that | |
3077 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3078 | */ | |
3079 | static void | |
3080 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3081 | { | |
3082 | int i; | |
3083 | for (i = 1; i < 4; i++) { | |
3084 | if ((i & access) != i) | |
3085 | __clear_bit(i, bmap); | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | static void | |
3090 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3091 | { | |
3092 | int i; | |
3093 | for (i = 0; i < 4; i++) { | |
3094 | if ((i & deny) != i) | |
3095 | __clear_bit(i, bmap); | |
3096 | } | |
3097 | } | |
3098 | ||
b37ad28b | 3099 | __be32 |
ca364317 BF |
3100 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3101 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3102 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3103 | { |
b37ad28b | 3104 | __be32 status; |
1da177e4 LT |
3105 | struct nfs4_stateid *stp; |
3106 | unsigned int share_access; | |
3107 | ||
3108 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3109 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3110 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3111 | |
d87a8ade | 3112 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3113 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3114 | return nfserr_inval; |
3115 | ||
3116 | nfs4_lock_state(); | |
dd453dfd | 3117 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3118 | od->od_seqid, |
1da177e4 | 3119 | &od->od_stateid, |
f3362737 | 3120 | OPEN_STATE, |
1da177e4 LT |
3121 | &od->od_stateowner, &stp, NULL))) |
3122 | goto out; | |
3123 | ||
3124 | status = nfserr_inval; | |
3125 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3126 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3127 | stp->st_access_bmap, od->od_share_access); | |
3128 | goto out; | |
3129 | } | |
3130 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3131 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3132 | stp->st_deny_bmap, od->od_share_deny); | |
3133 | goto out; | |
3134 | } | |
3135 | set_access(&share_access, stp->st_access_bmap); | |
3136 | nfs4_file_downgrade(stp->st_vfs_file, | |
3137 | share_access & ~od->od_share_access); | |
3138 | ||
3139 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3140 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3141 | ||
3142 | update_stateid(&stp->st_stateid); | |
3143 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3144 | status = nfs_ok; | |
3145 | out: | |
f2327d9a | 3146 | if (od->od_stateowner) { |
1da177e4 | 3147 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3148 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3149 | } |
1da177e4 LT |
3150 | nfs4_unlock_state(); |
3151 | return status; | |
3152 | } | |
3153 | ||
3154 | /* | |
3155 | * nfs4_unlock_state() called after encode | |
3156 | */ | |
b37ad28b | 3157 | __be32 |
ca364317 | 3158 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3159 | struct nfsd4_close *close) |
1da177e4 | 3160 | { |
b37ad28b | 3161 | __be32 status; |
1da177e4 LT |
3162 | struct nfs4_stateid *stp; |
3163 | ||
3164 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3165 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3166 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3167 | |
3168 | nfs4_lock_state(); | |
3169 | /* check close_lru for replay */ | |
dd453dfd | 3170 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3171 | close->cl_seqid, |
1da177e4 | 3172 | &close->cl_stateid, |
f3362737 | 3173 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3174 | &close->cl_stateowner, &stp, NULL))) |
3175 | goto out; | |
1da177e4 LT |
3176 | status = nfs_ok; |
3177 | update_stateid(&stp->st_stateid); | |
3178 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3179 | ||
04ef5954 | 3180 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3181 | release_open_stateid(stp); |
04ef5954 BF |
3182 | |
3183 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3184 | * released by the laundromat service after the lease period | |
3185 | * to enable us to handle CLOSE replay | |
3186 | */ | |
3187 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3188 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3189 | out: |
f2327d9a | 3190 | if (close->cl_stateowner) { |
1da177e4 | 3191 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3192 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3193 | } |
1da177e4 LT |
3194 | nfs4_unlock_state(); |
3195 | return status; | |
3196 | } | |
3197 | ||
b37ad28b | 3198 | __be32 |
ca364317 BF |
3199 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3200 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3201 | { |
203a8c8e BF |
3202 | struct nfs4_delegation *dp; |
3203 | stateid_t *stateid = &dr->dr_stateid; | |
3204 | struct inode *inode; | |
b37ad28b | 3205 | __be32 status; |
6668958f | 3206 | int flags = 0; |
1da177e4 | 3207 | |
ca364317 | 3208 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3209 | return status; |
3210 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3211 | |
6668958f AA |
3212 | if (nfsd4_has_session(cstate)) |
3213 | flags |= HAS_SESSION; | |
1da177e4 | 3214 | nfs4_lock_state(); |
203a8c8e BF |
3215 | status = nfserr_bad_stateid; |
3216 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3217 | goto out; | |
3218 | status = nfserr_stale_stateid; | |
3219 | if (STALE_STATEID(stateid)) | |
3220 | goto out; | |
7e0f7cf5 | 3221 | status = nfserr_bad_stateid; |
203a8c8e BF |
3222 | if (!is_delegation_stateid(stateid)) |
3223 | goto out; | |
203a8c8e | 3224 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3225 | if (!dp) |
203a8c8e | 3226 | goto out; |
6668958f | 3227 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3228 | if (status) |
3229 | goto out; | |
3230 | renew_client(dp->dl_client); | |
3231 | ||
3232 | unhash_delegation(dp); | |
1da177e4 | 3233 | out: |
203a8c8e BF |
3234 | nfs4_unlock_state(); |
3235 | ||
1da177e4 LT |
3236 | return status; |
3237 | } | |
3238 | ||
3239 | ||
3240 | /* | |
3241 | * Lock owner state (byte-range locks) | |
3242 | */ | |
3243 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3244 | #define LOCK_HASH_BITS 8 | |
3245 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3246 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3247 | ||
87df4de8 BH |
3248 | static inline u64 |
3249 | end_offset(u64 start, u64 len) | |
3250 | { | |
3251 | u64 end; | |
3252 | ||
3253 | end = start + len; | |
3254 | return end >= start ? end: NFS4_MAX_UINT64; | |
3255 | } | |
3256 | ||
3257 | /* last octet in a range */ | |
3258 | static inline u64 | |
3259 | last_byte_offset(u64 start, u64 len) | |
3260 | { | |
3261 | u64 end; | |
3262 | ||
3263 | BUG_ON(!len); | |
3264 | end = start + len; | |
3265 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3266 | } | |
3267 | ||
1da177e4 LT |
3268 | #define lockownerid_hashval(id) \ |
3269 | ((id) & LOCK_HASH_MASK) | |
3270 | ||
3271 | static inline unsigned int | |
3272 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3273 | struct xdr_netobj *ownername) | |
3274 | { | |
3275 | return (file_hashval(inode) + cl_id | |
3276 | + opaque_hashval(ownername->data, ownername->len)) | |
3277 | & LOCK_HASH_MASK; | |
3278 | } | |
3279 | ||
3280 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3281 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3282 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3283 | ||
fd39ca9a | 3284 | static struct nfs4_stateid * |
1da177e4 LT |
3285 | find_stateid(stateid_t *stid, int flags) |
3286 | { | |
9346eff0 | 3287 | struct nfs4_stateid *local; |
1da177e4 LT |
3288 | u32 st_id = stid->si_stateownerid; |
3289 | u32 f_id = stid->si_fileid; | |
3290 | unsigned int hashval; | |
3291 | ||
3292 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3293 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3294 | hashval = stateid_hashval(st_id, f_id); |
3295 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3296 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3297 | (local->st_stateid.si_fileid == f_id)) | |
3298 | return local; | |
3299 | } | |
3300 | } | |
9346eff0 KK |
3301 | |
3302 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3303 | hashval = stateid_hashval(st_id, f_id); |
3304 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3305 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3306 | (local->st_stateid.si_fileid == f_id)) | |
3307 | return local; | |
3308 | } | |
849823c5 | 3309 | } |
1da177e4 LT |
3310 | return NULL; |
3311 | } | |
3312 | ||
3313 | static struct nfs4_delegation * | |
3314 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3315 | { | |
13cd2184 N |
3316 | struct nfs4_file *fp; |
3317 | struct nfs4_delegation *dl; | |
1da177e4 | 3318 | |
8c10cbdb BH |
3319 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3320 | STATEID_VAL(stid)); | |
1da177e4 | 3321 | |
1da177e4 | 3322 | fp = find_file(ino); |
13cd2184 N |
3323 | if (!fp) |
3324 | return NULL; | |
3325 | dl = find_delegation_file(fp, stid); | |
3326 | put_nfs4_file(fp); | |
3327 | return dl; | |
1da177e4 LT |
3328 | } |
3329 | ||
3330 | /* | |
3331 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3332 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3333 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3334 | * locking, this prevents us from being completely protocol-compliant. The | |
3335 | * real solution to this problem is to start using unsigned file offsets in | |
3336 | * the VFS, but this is a very deep change! | |
3337 | */ | |
3338 | static inline void | |
3339 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3340 | { | |
3341 | if (lock->fl_start < 0) | |
3342 | lock->fl_start = OFFSET_MAX; | |
3343 | if (lock->fl_end < 0) | |
3344 | lock->fl_end = OFFSET_MAX; | |
3345 | } | |
3346 | ||
d5b9026a N |
3347 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3348 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3349 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3350 | }; |
1da177e4 LT |
3351 | |
3352 | static inline void | |
3353 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3354 | { | |
d5b9026a N |
3355 | struct nfs4_stateowner *sop; |
3356 | unsigned int hval; | |
1da177e4 | 3357 | |
d5b9026a N |
3358 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3359 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3360 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3361 | kref_get(&sop->so_ref); |
3362 | deny->ld_sop = sop; | |
3363 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3364 | } else { |
3365 | deny->ld_sop = NULL; | |
3366 | deny->ld_clientid.cl_boot = 0; | |
3367 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3368 | } |
3369 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3370 | deny->ld_length = NFS4_MAX_UINT64; |
3371 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3372 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3373 | deny->ld_type = NFS4_READ_LT; | |
3374 | if (fl->fl_type != F_RDLCK) | |
3375 | deny->ld_type = NFS4_WRITE_LT; | |
3376 | } | |
3377 | ||
1da177e4 LT |
3378 | static struct nfs4_stateowner * |
3379 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3380 | struct xdr_netobj *owner) | |
3381 | { | |
3382 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3383 | struct nfs4_stateowner *op; | |
3384 | ||
3385 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3386 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3387 | return op; |
3388 | } | |
3389 | return NULL; | |
3390 | } | |
3391 | ||
3392 | /* | |
3393 | * Alloc a lock owner structure. | |
3394 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3395 | * occured. | |
3396 | * | |
3397 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3398 | */ |
3399 | ||
3400 | static struct nfs4_stateowner * | |
3401 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3402 | struct nfs4_stateowner *sop; | |
3403 | struct nfs4_replay *rp; | |
3404 | unsigned int idhashval; | |
3405 | ||
3406 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3407 | return NULL; | |
3408 | idhashval = lockownerid_hashval(current_ownerid); | |
3409 | INIT_LIST_HEAD(&sop->so_idhash); | |
3410 | INIT_LIST_HEAD(&sop->so_strhash); | |
3411 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3412 | INIT_LIST_HEAD(&sop->so_stateids); |
3413 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3414 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3415 | sop->so_time = 0; | |
3416 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3417 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3418 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3419 | sop->so_is_open_owner = 0; |
3420 | sop->so_id = current_ownerid++; | |
3421 | sop->so_client = clp; | |
b59e3c0e NB |
3422 | /* It is the openowner seqid that will be incremented in encode in the |
3423 | * case of new lockowners; so increment the lock seqid manually: */ | |
3424 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3425 | sop->so_confirmed = 1; |
3426 | rp = &sop->so_replay; | |
de1ae286 | 3427 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3428 | rp->rp_buflen = 0; |
3429 | rp->rp_buf = rp->rp_ibuf; | |
3430 | return sop; | |
3431 | } | |
3432 | ||
fd39ca9a | 3433 | static struct nfs4_stateid * |
1da177e4 LT |
3434 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3435 | { | |
3436 | struct nfs4_stateid *stp; | |
3437 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3438 | ||
5ac049ac N |
3439 | stp = nfs4_alloc_stateid(); |
3440 | if (stp == NULL) | |
1da177e4 LT |
3441 | goto out; |
3442 | INIT_LIST_HEAD(&stp->st_hash); | |
3443 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3444 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3445 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3446 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3447 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3448 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3449 | stp->st_stateowner = sop; |
13cd2184 | 3450 | get_nfs4_file(fp); |
1da177e4 | 3451 | stp->st_file = fp; |
e4e83ea4 | 3452 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3453 | stp->st_stateid.si_stateownerid = sop->so_id; |
3454 | stp->st_stateid.si_fileid = fp->fi_id; | |
3455 | stp->st_stateid.si_generation = 0; | |
3456 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3457 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3458 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3459 | stp->st_openstp = open_stp; |
1da177e4 LT |
3460 | |
3461 | out: | |
3462 | return stp; | |
3463 | } | |
3464 | ||
fd39ca9a | 3465 | static int |
1da177e4 LT |
3466 | check_lock_length(u64 offset, u64 length) |
3467 | { | |
87df4de8 | 3468 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3469 | LOFF_OVERFLOW(offset, length))); |
3470 | } | |
3471 | ||
3472 | /* | |
3473 | * LOCK operation | |
3474 | */ | |
b37ad28b | 3475 | __be32 |
ca364317 | 3476 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3477 | struct nfsd4_lock *lock) |
1da177e4 | 3478 | { |
3e9e3dbe | 3479 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3480 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3481 | struct nfs4_stateid *lock_stp; |
3482 | struct file *filp; | |
3483 | struct file_lock file_lock; | |
8dc7c311 | 3484 | struct file_lock conflock; |
b37ad28b | 3485 | __be32 status = 0; |
1da177e4 | 3486 | unsigned int strhashval; |
150b3934 | 3487 | unsigned int cmd; |
b8dd7b9a | 3488 | int err; |
1da177e4 LT |
3489 | |
3490 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3491 | (long long) lock->lk_offset, | |
3492 | (long long) lock->lk_length); | |
3493 | ||
1da177e4 LT |
3494 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3495 | return nfserr_inval; | |
3496 | ||
ca364317 | 3497 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3498 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3499 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3500 | return status; | |
3501 | } | |
3502 | ||
1da177e4 LT |
3503 | nfs4_lock_state(); |
3504 | ||
3505 | if (lock->lk_is_new) { | |
893f8770 N |
3506 | /* |
3507 | * Client indicates that this is a new lockowner. | |
3508 | * Use open owner and open stateid to create lock owner and | |
3509 | * lock stateid. | |
3510 | */ | |
1da177e4 LT |
3511 | struct nfs4_stateid *open_stp = NULL; |
3512 | struct nfs4_file *fp; | |
3513 | ||
3514 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3515 | if (!nfsd4_has_session(cstate) && |
3516 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3517 | goto out; |
1da177e4 | 3518 | |
1da177e4 | 3519 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3520 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3521 | lock->lk_new_open_seqid, |
3522 | &lock->lk_new_open_stateid, | |
f3362737 | 3523 | OPEN_STATE, |
3a65588a | 3524 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3525 | lock); |
37515177 | 3526 | if (status) |
1da177e4 | 3527 | goto out; |
3a65588a | 3528 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3529 | /* create lockowner and lock stateid */ |
3530 | fp = open_stp->st_file; | |
3531 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3532 | open_sop->so_client->cl_clientid.cl_id, | |
3533 | &lock->v.new.owner); | |
3e9e3dbe N |
3534 | /* XXX: Do we need to check for duplicate stateowners on |
3535 | * the same file, or should they just be allowed (and | |
3536 | * create new stateids)? */ | |
1da177e4 | 3537 | status = nfserr_resource; |
b59e3c0e NB |
3538 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3539 | open_sop->so_client, open_stp, lock); | |
3540 | if (lock_sop == NULL) | |
1da177e4 | 3541 | goto out; |
b59e3c0e | 3542 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3543 | if (lock_stp == NULL) |
1da177e4 | 3544 | goto out; |
1da177e4 LT |
3545 | } else { |
3546 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3547 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3548 | lock->lk_old_lock_seqid, |
3549 | &lock->lk_old_lock_stateid, | |
f3362737 | 3550 | LOCK_STATE, |
3a65588a | 3551 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3552 | if (status) |
3553 | goto out; | |
3a65588a | 3554 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3555 | } |
3a65588a | 3556 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3557 | filp = lock_stp->st_vfs_file; |
3558 | ||
0dd395dc | 3559 | status = nfserr_grace; |
af558e33 | 3560 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3561 | goto out; |
3562 | status = nfserr_no_grace; | |
af558e33 | 3563 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3564 | goto out; |
3565 | ||
1da177e4 LT |
3566 | locks_init_lock(&file_lock); |
3567 | switch (lock->lk_type) { | |
3568 | case NFS4_READ_LT: | |
3569 | case NFS4_READW_LT: | |
3570 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3571 | cmd = F_SETLK; |
1da177e4 LT |
3572 | break; |
3573 | case NFS4_WRITE_LT: | |
3574 | case NFS4_WRITEW_LT: | |
3575 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3576 | cmd = F_SETLK; |
1da177e4 LT |
3577 | break; |
3578 | default: | |
3579 | status = nfserr_inval; | |
3580 | goto out; | |
3581 | } | |
b59e3c0e | 3582 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3583 | file_lock.fl_pid = current->tgid; |
3584 | file_lock.fl_file = filp; | |
3585 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3586 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3587 | |
3588 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3589 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3590 | nfs4_transform_lock_offset(&file_lock); |
3591 | ||
3592 | /* | |
3593 | * Try to lock the file in the VFS. | |
3594 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3595 | */ | |
3596 | ||
fd85b817 | 3597 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3598 | switch (-err) { |
1da177e4 LT |
3599 | case 0: /* success! */ |
3600 | update_stateid(&lock_stp->st_stateid); | |
3601 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3602 | sizeof(stateid_t)); | |
b8dd7b9a | 3603 | status = 0; |
eb76b3fd AA |
3604 | break; |
3605 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3606 | status = nfserr_denied; | |
3607 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3608 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3609 | break; | |
1da177e4 LT |
3610 | case (EDEADLK): |
3611 | status = nfserr_deadlock; | |
eb76b3fd | 3612 | break; |
1da177e4 | 3613 | default: |
fd85b817 | 3614 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3615 | status = nfserr_resource; |
3616 | break; | |
1da177e4 | 3617 | } |
1da177e4 | 3618 | out: |
8a280510 | 3619 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3620 | release_lockowner(lock_sop); |
3a65588a BF |
3621 | if (lock->lk_replay_owner) { |
3622 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3623 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3624 | } |
1da177e4 LT |
3625 | nfs4_unlock_state(); |
3626 | return status; | |
3627 | } | |
3628 | ||
55ef1274 BF |
3629 | /* |
3630 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3631 | * so we do a temporary open here just to get an open file to pass to | |
3632 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3633 | * inode operation.) | |
3634 | */ | |
3635 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3636 | { | |
3637 | struct file *file; | |
3638 | int err; | |
3639 | ||
3640 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3641 | if (err) | |
3642 | return err; | |
3643 | err = vfs_test_lock(file, lock); | |
3644 | nfsd_close(file); | |
3645 | return err; | |
3646 | } | |
3647 | ||
1da177e4 LT |
3648 | /* |
3649 | * LOCKT operation | |
3650 | */ | |
b37ad28b | 3651 | __be32 |
ca364317 BF |
3652 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3653 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3654 | { |
3655 | struct inode *inode; | |
1da177e4 | 3656 | struct file_lock file_lock; |
fd85b817 | 3657 | int error; |
b37ad28b | 3658 | __be32 status; |
1da177e4 | 3659 | |
af558e33 | 3660 | if (locks_in_grace()) |
1da177e4 LT |
3661 | return nfserr_grace; |
3662 | ||
3663 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3664 | return nfserr_inval; | |
3665 | ||
3666 | lockt->lt_stateowner = NULL; | |
3667 | nfs4_lock_state(); | |
3668 | ||
3669 | status = nfserr_stale_clientid; | |
60adfc50 | 3670 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3671 | goto out; |
1da177e4 | 3672 | |
ca364317 | 3673 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3674 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3675 | if (status == nfserr_symlink) |
3676 | status = nfserr_inval; | |
3677 | goto out; | |
3678 | } | |
3679 | ||
ca364317 | 3680 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3681 | locks_init_lock(&file_lock); |
3682 | switch (lockt->lt_type) { | |
3683 | case NFS4_READ_LT: | |
3684 | case NFS4_READW_LT: | |
3685 | file_lock.fl_type = F_RDLCK; | |
3686 | break; | |
3687 | case NFS4_WRITE_LT: | |
3688 | case NFS4_WRITEW_LT: | |
3689 | file_lock.fl_type = F_WRLCK; | |
3690 | break; | |
3691 | default: | |
2fdada03 | 3692 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3693 | status = nfserr_inval; |
3694 | goto out; | |
3695 | } | |
3696 | ||
3697 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3698 | &lockt->lt_clientid, &lockt->lt_owner); | |
3699 | if (lockt->lt_stateowner) | |
3700 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3701 | file_lock.fl_pid = current->tgid; | |
3702 | file_lock.fl_flags = FL_POSIX; | |
3703 | ||
3704 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3705 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3706 | |
3707 | nfs4_transform_lock_offset(&file_lock); | |
3708 | ||
1da177e4 | 3709 | status = nfs_ok; |
55ef1274 | 3710 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3711 | if (error) { |
3712 | status = nfserrno(error); | |
3713 | goto out; | |
3714 | } | |
9d6a8c5c | 3715 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3716 | status = nfserr_denied; |
9d6a8c5c | 3717 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3718 | } |
3719 | out: | |
3720 | nfs4_unlock_state(); | |
3721 | return status; | |
3722 | } | |
3723 | ||
b37ad28b | 3724 | __be32 |
ca364317 | 3725 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3726 | struct nfsd4_locku *locku) |
1da177e4 LT |
3727 | { |
3728 | struct nfs4_stateid *stp; | |
3729 | struct file *filp = NULL; | |
3730 | struct file_lock file_lock; | |
b37ad28b | 3731 | __be32 status; |
b8dd7b9a | 3732 | int err; |
1da177e4 LT |
3733 | |
3734 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3735 | (long long) locku->lu_offset, | |
3736 | (long long) locku->lu_length); | |
3737 | ||
3738 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3739 | return nfserr_inval; | |
3740 | ||
3741 | nfs4_lock_state(); | |
3742 | ||
dd453dfd | 3743 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3744 | locku->lu_seqid, |
3745 | &locku->lu_stateid, | |
f3362737 | 3746 | LOCK_STATE, |
1da177e4 LT |
3747 | &locku->lu_stateowner, &stp, NULL))) |
3748 | goto out; | |
3749 | ||
3750 | filp = stp->st_vfs_file; | |
3751 | BUG_ON(!filp); | |
3752 | locks_init_lock(&file_lock); | |
3753 | file_lock.fl_type = F_UNLCK; | |
3754 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3755 | file_lock.fl_pid = current->tgid; | |
3756 | file_lock.fl_file = filp; | |
3757 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3758 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3759 | file_lock.fl_start = locku->lu_offset; |
3760 | ||
87df4de8 | 3761 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3762 | nfs4_transform_lock_offset(&file_lock); |
3763 | ||
3764 | /* | |
3765 | * Try to unlock the file in the VFS. | |
3766 | */ | |
fd85b817 | 3767 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3768 | if (err) { |
fd85b817 | 3769 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3770 | goto out_nfserr; |
3771 | } | |
3772 | /* | |
3773 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3774 | */ | |
3775 | update_stateid(&stp->st_stateid); | |
3776 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3777 | ||
3778 | out: | |
f2327d9a | 3779 | if (locku->lu_stateowner) { |
1da177e4 | 3780 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3781 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3782 | } |
1da177e4 LT |
3783 | nfs4_unlock_state(); |
3784 | return status; | |
3785 | ||
3786 | out_nfserr: | |
b8dd7b9a | 3787 | status = nfserrno(err); |
1da177e4 LT |
3788 | goto out; |
3789 | } | |
3790 | ||
3791 | /* | |
3792 | * returns | |
3793 | * 1: locks held by lockowner | |
3794 | * 0: no locks held by lockowner | |
3795 | */ | |
3796 | static int | |
3797 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3798 | { | |
3799 | struct file_lock **flpp; | |
7eaa36e2 | 3800 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3801 | int status = 0; |
3802 | ||
3803 | lock_kernel(); | |
3804 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3805 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3806 | status = 1; |
3807 | goto out; | |
796dadfd | 3808 | } |
1da177e4 LT |
3809 | } |
3810 | out: | |
3811 | unlock_kernel(); | |
3812 | return status; | |
3813 | } | |
3814 | ||
b37ad28b | 3815 | __be32 |
b591480b BF |
3816 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3817 | struct nfsd4_compound_state *cstate, | |
3818 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3819 | { |
3820 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3821 | struct nfs4_stateowner *sop; |
3822 | struct nfs4_stateid *stp; | |
1da177e4 | 3823 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3824 | struct list_head matches; |
3825 | int i; | |
b37ad28b | 3826 | __be32 status; |
1da177e4 LT |
3827 | |
3828 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3829 | clid->cl_boot, clid->cl_id); | |
3830 | ||
3831 | /* XXX check for lease expiration */ | |
3832 | ||
3833 | status = nfserr_stale_clientid; | |
849823c5 | 3834 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3835 | return status; |
1da177e4 LT |
3836 | |
3837 | nfs4_lock_state(); | |
3838 | ||
3e9e3dbe N |
3839 | status = nfserr_locks_held; |
3840 | /* XXX: we're doing a linear search through all the lockowners. | |
3841 | * Yipes! For now we'll just hope clients aren't really using | |
3842 | * release_lockowner much, but eventually we have to fix these | |
3843 | * data structures. */ | |
3844 | INIT_LIST_HEAD(&matches); | |
3845 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3846 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3847 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3848 | continue; |
3849 | list_for_each_entry(stp, &sop->so_stateids, | |
3850 | st_perstateowner) { | |
3851 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3852 | goto out; | |
3853 | /* Note: so_perclient unused for lockowners, | |
3854 | * so it's OK to fool with here. */ | |
3855 | list_add(&sop->so_perclient, &matches); | |
3856 | } | |
1da177e4 | 3857 | } |
3e9e3dbe N |
3858 | } |
3859 | /* Clients probably won't expect us to return with some (but not all) | |
3860 | * of the lockowner state released; so don't release any until all | |
3861 | * have been checked. */ | |
3862 | status = nfs_ok; | |
0fa822e4 N |
3863 | while (!list_empty(&matches)) { |
3864 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3865 | so_perclient); | |
3866 | /* unhash_stateowner deletes so_perclient only | |
3867 | * for openowners. */ | |
3868 | list_del(&sop->so_perclient); | |
f044ff83 | 3869 | release_lockowner(sop); |
1da177e4 LT |
3870 | } |
3871 | out: | |
3872 | nfs4_unlock_state(); | |
3873 | return status; | |
3874 | } | |
3875 | ||
3876 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3877 | alloc_reclaim(void) |
1da177e4 | 3878 | { |
a55370a3 | 3879 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3880 | } |
3881 | ||
c7b9a459 | 3882 | int |
a1bcecd2 | 3883 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3884 | { |
3885 | unsigned int strhashval = clientstr_hashval(name); | |
3886 | struct nfs4_client *clp; | |
3887 | ||
a1bcecd2 | 3888 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3889 | return clp ? 1 : 0; |
3890 | } | |
3891 | ||
1da177e4 LT |
3892 | /* |
3893 | * failure => all reset bets are off, nfserr_no_grace... | |
3894 | */ | |
190e4fbf N |
3895 | int |
3896 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3897 | { |
3898 | unsigned int strhashval; | |
3899 | struct nfs4_client_reclaim *crp = NULL; | |
3900 | ||
a55370a3 N |
3901 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3902 | crp = alloc_reclaim(); | |
1da177e4 LT |
3903 | if (!crp) |
3904 | return 0; | |
a55370a3 | 3905 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3906 | INIT_LIST_HEAD(&crp->cr_strhash); |
3907 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3908 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3909 | reclaim_str_hashtbl_size++; |
3910 | return 1; | |
3911 | } | |
3912 | ||
3913 | static void | |
3914 | nfs4_release_reclaim(void) | |
3915 | { | |
3916 | struct nfs4_client_reclaim *crp = NULL; | |
3917 | int i; | |
3918 | ||
1da177e4 LT |
3919 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3920 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3921 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3922 | struct nfs4_client_reclaim, cr_strhash); | |
3923 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3924 | kfree(crp); |
3925 | reclaim_str_hashtbl_size--; | |
3926 | } | |
3927 | } | |
3928 | BUG_ON(reclaim_str_hashtbl_size); | |
3929 | } | |
3930 | ||
3931 | /* | |
3932 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3933 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3934 | nfs4_find_reclaim_client(clientid_t *clid) |
3935 | { | |
3936 | unsigned int strhashval; | |
3937 | struct nfs4_client *clp; | |
3938 | struct nfs4_client_reclaim *crp = NULL; | |
3939 | ||
3940 | ||
3941 | /* find clientid in conf_id_hashtbl */ | |
3942 | clp = find_confirmed_client(clid); | |
3943 | if (clp == NULL) | |
3944 | return NULL; | |
3945 | ||
a55370a3 N |
3946 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3947 | clp->cl_name.len, clp->cl_name.data, | |
3948 | clp->cl_recdir); | |
1da177e4 LT |
3949 | |
3950 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3951 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3952 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3953 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3954 | return crp; |
3955 | } | |
3956 | } | |
3957 | return NULL; | |
3958 | } | |
3959 | ||
3960 | /* | |
3961 | * Called from OPEN. Look for clientid in reclaim list. | |
3962 | */ | |
b37ad28b | 3963 | __be32 |
1da177e4 LT |
3964 | nfs4_check_open_reclaim(clientid_t *clid) |
3965 | { | |
dfc83565 | 3966 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3967 | } |
3968 | ||
ac4d8ff2 | 3969 | /* initialization to perform at module load time: */ |
1da177e4 | 3970 | |
e8ff2a84 | 3971 | int |
ac4d8ff2 | 3972 | nfs4_state_init(void) |
1da177e4 | 3973 | { |
e8ff2a84 | 3974 | int i, status; |
1da177e4 | 3975 | |
e8ff2a84 BF |
3976 | status = nfsd4_init_slabs(); |
3977 | if (status) | |
3978 | return status; | |
1da177e4 LT |
3979 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3980 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3981 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3982 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3983 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3984 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3985 | } |
5282fd72 ME |
3986 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3987 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3988 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3989 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3990 | } | |
3991 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3992 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3993 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3994 | } | |
3995 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3996 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3997 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3998 | } | |
3999 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4000 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4001 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4002 | } | |
1da177e4 | 4003 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4004 | INIT_LIST_HEAD(&close_lru); |
4005 | INIT_LIST_HEAD(&client_lru); | |
4006 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4007 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4008 | return 0; |
ac4d8ff2 N |
4009 | } |
4010 | ||
190e4fbf N |
4011 | static void |
4012 | nfsd4_load_reboot_recovery_data(void) | |
4013 | { | |
4014 | int status; | |
4015 | ||
0964a3d3 N |
4016 | nfs4_lock_state(); |
4017 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4018 | status = nfsd4_recdir_load(); |
0964a3d3 | 4019 | nfs4_unlock_state(); |
190e4fbf N |
4020 | if (status) |
4021 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4022 | } | |
4023 | ||
c2f1a551 MS |
4024 | /* |
4025 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4026 | * client may quite reasonably hang on to a delegation as long as it has | |
4027 | * the inode cached. This becomes an obvious problem the first time a | |
4028 | * client's inode cache approaches the size of the server's total memory. | |
4029 | * | |
4030 | * For now we avoid this problem by imposing a hard limit on the number | |
4031 | * of delegations, which varies according to the server's memory size. | |
4032 | */ | |
4033 | static void | |
4034 | set_max_delegations(void) | |
4035 | { | |
4036 | /* | |
4037 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4038 | * estimates suggest that in the worst case (where every delegation | |
4039 | * is for a different inode), a delegation could take about 1.5K, | |
4040 | * giving a worst case usage of about 6% of memory. | |
4041 | */ | |
4042 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4043 | } | |
4044 | ||
ac4d8ff2 N |
4045 | /* initialization to perform when the nfsd service is started: */ |
4046 | ||
29ab23cc | 4047 | static int |
ac4d8ff2 N |
4048 | __nfs4_state_start(void) |
4049 | { | |
b5a1a81e BF |
4050 | int ret; |
4051 | ||
1da177e4 | 4052 | boot_time = get_seconds(); |
af558e33 | 4053 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4054 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4055 | nfsd4_grace); |
b5a1a81e BF |
4056 | ret = set_callback_cred(); |
4057 | if (ret) | |
4058 | return -ENOMEM; | |
58da282b | 4059 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4060 | if (laundry_wq == NULL) |
4061 | return -ENOMEM; | |
b5a1a81e BF |
4062 | ret = nfsd4_create_callback_queue(); |
4063 | if (ret) | |
4064 | goto out_free_laundry; | |
e46b498c | 4065 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4066 | set_max_delegations(); |
b5a1a81e BF |
4067 | return 0; |
4068 | out_free_laundry: | |
4069 | destroy_workqueue(laundry_wq); | |
4070 | return ret; | |
1da177e4 LT |
4071 | } |
4072 | ||
29ab23cc | 4073 | int |
76a3550e | 4074 | nfs4_state_start(void) |
1da177e4 | 4075 | { |
29ab23cc BF |
4076 | int ret; |
4077 | ||
1da177e4 | 4078 | if (nfs4_init) |
29ab23cc | 4079 | return 0; |
190e4fbf | 4080 | nfsd4_load_reboot_recovery_data(); |
29ab23cc BF |
4081 | ret = __nfs4_state_start(); |
4082 | if (ret) | |
4083 | return ret; | |
1da177e4 | 4084 | nfs4_init = 1; |
29ab23cc | 4085 | return 0; |
1da177e4 LT |
4086 | } |
4087 | ||
1da177e4 LT |
4088 | static void |
4089 | __nfs4_state_shutdown(void) | |
4090 | { | |
4091 | int i; | |
4092 | struct nfs4_client *clp = NULL; | |
4093 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4094 | struct list_head *pos, *next, reaplist; |
4095 | ||
1da177e4 LT |
4096 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4097 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4098 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4099 | expire_client(clp); | |
4100 | } | |
4101 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4102 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4103 | expire_client(clp); | |
4104 | } | |
4105 | } | |
4106 | INIT_LIST_HEAD(&reaplist); | |
4107 | spin_lock(&recall_lock); | |
4108 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4109 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4110 | list_move(&dp->dl_recall_lru, &reaplist); | |
4111 | } | |
4112 | spin_unlock(&recall_lock); | |
4113 | list_for_each_safe(pos, next, &reaplist) { | |
4114 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4115 | list_del_init(&dp->dl_recall_lru); | |
4116 | unhash_delegation(dp); | |
4117 | } | |
4118 | ||
190e4fbf | 4119 | nfsd4_shutdown_recdir(); |
1da177e4 | 4120 | nfs4_init = 0; |
1da177e4 LT |
4121 | } |
4122 | ||
4123 | void | |
4124 | nfs4_state_shutdown(void) | |
4125 | { | |
5e8d5c29 N |
4126 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4127 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4128 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4129 | nfs4_lock_state(); |
4130 | nfs4_release_reclaim(); | |
4131 | __nfs4_state_shutdown(); | |
b5a1a81e | 4132 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4133 | nfs4_unlock_state(); |
4134 | } | |
4135 | ||
3dd98a3b JL |
4136 | /* |
4137 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4138 | * accessed when nfsd is starting. | |
4139 | */ | |
0964a3d3 N |
4140 | static void |
4141 | nfs4_set_recdir(char *recdir) | |
4142 | { | |
0964a3d3 | 4143 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4144 | } |
4145 | ||
4146 | /* | |
4147 | * Change the NFSv4 recovery directory to recdir. | |
4148 | */ | |
4149 | int | |
4150 | nfs4_reset_recoverydir(char *recdir) | |
4151 | { | |
4152 | int status; | |
a63bb996 | 4153 | struct path path; |
0964a3d3 | 4154 | |
a63bb996 | 4155 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4156 | if (status) |
4157 | return status; | |
4158 | status = -ENOTDIR; | |
a63bb996 | 4159 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4160 | nfs4_set_recdir(recdir); |
4161 | status = 0; | |
4162 | } | |
a63bb996 | 4163 | path_put(&path); |
0964a3d3 N |
4164 | return status; |
4165 | } | |
4166 | ||
3dd98a3b JL |
4167 | char * |
4168 | nfs4_recoverydir(void) | |
4169 | { | |
4170 | return user_recovery_dirname; | |
4171 | } |