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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; | |
fd39ca9a N |
54 | static stateid_t zerostateid; /* bits all 0 */ |
55 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 56 | static u64 current_sessionid = 1; |
fd39ca9a N |
57 | |
58 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
59 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 60 | |
1da177e4 | 61 | /* forward declarations */ |
fd39ca9a | 62 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 63 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
64 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
65 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* Locking: */ |
68 | ||
69 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 70 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 71 | |
8b671b80 BF |
72 | /* |
73 | * Currently used for the del_recall_lru and file hash table. In an | |
74 | * effort to decrease the scope of the client_mutex, this spinlock may | |
75 | * eventually cover more: | |
76 | */ | |
77 | static DEFINE_SPINLOCK(recall_lock); | |
78 | ||
e18b890b CL |
79 | static struct kmem_cache *stateowner_slab = NULL; |
80 | static struct kmem_cache *file_slab = NULL; | |
81 | static struct kmem_cache *stateid_slab = NULL; | |
82 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 83 | |
1da177e4 LT |
84 | void |
85 | nfs4_lock_state(void) | |
86 | { | |
353ab6e9 | 87 | mutex_lock(&client_mutex); |
1da177e4 LT |
88 | } |
89 | ||
90 | void | |
91 | nfs4_unlock_state(void) | |
92 | { | |
353ab6e9 | 93 | mutex_unlock(&client_mutex); |
1da177e4 LT |
94 | } |
95 | ||
96 | static inline u32 | |
97 | opaque_hashval(const void *ptr, int nbytes) | |
98 | { | |
99 | unsigned char *cptr = (unsigned char *) ptr; | |
100 | ||
101 | u32 x = 0; | |
102 | while (nbytes--) { | |
103 | x *= 37; | |
104 | x += *cptr++; | |
105 | } | |
106 | return x; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | static struct list_head del_recall_lru; |
110 | ||
13cd2184 N |
111 | static inline void |
112 | put_nfs4_file(struct nfs4_file *fi) | |
113 | { | |
8b671b80 BF |
114 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
115 | list_del(&fi->fi_hash); | |
116 | spin_unlock(&recall_lock); | |
117 | iput(fi->fi_inode); | |
118 | kmem_cache_free(file_slab, fi); | |
119 | } | |
13cd2184 N |
120 | } |
121 | ||
122 | static inline void | |
123 | get_nfs4_file(struct nfs4_file *fi) | |
124 | { | |
8b671b80 | 125 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
126 | } |
127 | ||
ef0f3390 | 128 | static int num_delegations; |
c2f1a551 | 129 | unsigned int max_delegations; |
ef0f3390 N |
130 | |
131 | /* | |
132 | * Open owner state (share locks) | |
133 | */ | |
134 | ||
135 | /* hash tables for nfs4_stateowner */ | |
136 | #define OWNER_HASH_BITS 8 | |
137 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
138 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
139 | ||
140 | #define ownerid_hashval(id) \ | |
141 | ((id) & OWNER_HASH_MASK) | |
142 | #define ownerstr_hashval(clientid, ownername) \ | |
143 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
144 | ||
145 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
146 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
147 | ||
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
151 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
152 | /* hash table for (open)nfs4_stateid */ | |
153 | #define STATEID_HASH_BITS 10 | |
154 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
155 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
156 | ||
157 | #define file_hashval(x) \ | |
158 | hash_ptr(x, FILE_HASH_BITS) | |
159 | #define stateid_hashval(owner_id, file_id) \ | |
160 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
161 | ||
162 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
163 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
164 | ||
1da177e4 LT |
165 | static struct nfs4_delegation * |
166 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
167 | { | |
168 | struct nfs4_delegation *dp; | |
169 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 170 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
171 | |
172 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
173 | /* |
174 | * Major work on the lease subsystem (for example, to support | |
175 | * calbacks on stat) will be required before we can support | |
176 | * write delegations properly. | |
177 | */ | |
178 | if (type != NFS4_OPEN_DELEGATE_READ) | |
179 | return NULL; | |
47f9940c MS |
180 | if (fp->fi_had_conflict) |
181 | return NULL; | |
c2f1a551 | 182 | if (num_delegations > max_delegations) |
ef0f3390 | 183 | return NULL; |
5b2d21c1 N |
184 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
185 | if (dp == NULL) | |
1da177e4 | 186 | return dp; |
ef0f3390 | 187 | num_delegations++; |
ea1da636 N |
188 | INIT_LIST_HEAD(&dp->dl_perfile); |
189 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
190 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
191 | dp->dl_client = clp; | |
13cd2184 | 192 | get_nfs4_file(fp); |
1da177e4 LT |
193 | dp->dl_file = fp; |
194 | dp->dl_flock = NULL; | |
195 | get_file(stp->st_vfs_file); | |
196 | dp->dl_vfs_file = stp->st_vfs_file; | |
197 | dp->dl_type = type; | |
b53d40c5 | 198 | dp->dl_ident = cb->cb_ident; |
e4e83ea4 | 199 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
200 | dp->dl_stateid.si_stateownerid = current_delegid++; |
201 | dp->dl_stateid.si_fileid = 0; | |
202 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 203 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
204 | dp->dl_time = 0; |
205 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
206 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
207 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
b5a1a81e | 208 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
209 | return dp; |
210 | } | |
211 | ||
212 | void | |
213 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
214 | { | |
215 | if (atomic_dec_and_test(&dp->dl_count)) { | |
216 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 217 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 218 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 219 | num_delegations--; |
1da177e4 LT |
220 | } |
221 | } | |
222 | ||
223 | /* Remove the associated file_lock first, then remove the delegation. | |
224 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
225 | * the i_flock list, eventually calling nfsd's lock_manager | |
226 | * fl_release_callback. | |
227 | */ | |
228 | static void | |
229 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
230 | { | |
231 | struct file *filp = dp->dl_vfs_file; | |
232 | ||
233 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
234 | dp->dl_vfs_file = NULL; | |
235 | /* The following nfsd_close may not actually close the file, | |
236 | * but we want to remove the lease in any case. */ | |
c907132d | 237 | if (dp->dl_flock) |
a9933cea | 238 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 239 | nfsd_close(filp); |
1da177e4 LT |
240 | } |
241 | ||
242 | /* Called under the state lock. */ | |
243 | static void | |
244 | unhash_delegation(struct nfs4_delegation *dp) | |
245 | { | |
ea1da636 N |
246 | list_del_init(&dp->dl_perfile); |
247 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
248 | spin_lock(&recall_lock); |
249 | list_del_init(&dp->dl_recall_lru); | |
250 | spin_unlock(&recall_lock); | |
251 | nfs4_close_delegation(dp); | |
252 | nfs4_put_delegation(dp); | |
253 | } | |
254 | ||
255 | /* | |
256 | * SETCLIENTID state | |
257 | */ | |
258 | ||
36acb66b | 259 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
260 | static DEFINE_SPINLOCK(client_lock); |
261 | ||
1da177e4 LT |
262 | /* Hash tables for nfs4_clientid state */ |
263 | #define CLIENT_HASH_BITS 4 | |
264 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
265 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
266 | ||
267 | #define clientid_hashval(id) \ | |
268 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
269 | #define clientstr_hashval(name) \ |
270 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
271 | /* |
272 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
273 | * used in reboot/reset lease grace period processing | |
274 | * | |
275 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
276 | * setclientid_confirmed info. | |
277 | * | |
278 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
279 | * setclientid info. | |
280 | * | |
281 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
282 | * for lease renewal. | |
283 | * | |
284 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
285 | * for last close replay. | |
286 | */ | |
287 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
288 | static int reclaim_str_hashtbl_size = 0; | |
289 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
290 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
291 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
292 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
293 | static struct list_head client_lru; | |
294 | static struct list_head close_lru; | |
295 | ||
2283963f BF |
296 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
297 | { | |
298 | list_del(&stp->st_hash); | |
299 | list_del(&stp->st_perfile); | |
300 | list_del(&stp->st_perstateowner); | |
301 | } | |
302 | ||
303 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
304 | { | |
305 | put_nfs4_file(stp->st_file); | |
306 | kmem_cache_free(stateid_slab, stp); | |
307 | } | |
308 | ||
309 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
310 | { | |
311 | unhash_generic_stateid(stp); | |
312 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
313 | free_generic_stateid(stp); | |
314 | } | |
315 | ||
f044ff83 BF |
316 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
317 | { | |
318 | struct nfs4_stateid *stp; | |
319 | ||
320 | list_del(&sop->so_idhash); | |
321 | list_del(&sop->so_strhash); | |
322 | list_del(&sop->so_perstateid); | |
323 | while (!list_empty(&sop->so_stateids)) { | |
324 | stp = list_first_entry(&sop->so_stateids, | |
325 | struct nfs4_stateid, st_perstateowner); | |
326 | release_lock_stateid(stp); | |
327 | } | |
328 | } | |
329 | ||
330 | static void release_lockowner(struct nfs4_stateowner *sop) | |
331 | { | |
332 | unhash_lockowner(sop); | |
333 | nfs4_put_stateowner(sop); | |
334 | } | |
335 | ||
f1d110ca BF |
336 | static void |
337 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
338 | { | |
339 | struct nfs4_stateowner *lock_sop; | |
340 | ||
341 | while (!list_empty(&open_stp->st_lockowners)) { | |
342 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
343 | struct nfs4_stateowner, so_perstateid); | |
344 | /* list_del(&open_stp->st_lockowners); */ | |
345 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 346 | release_lockowner(lock_sop); |
f1d110ca BF |
347 | } |
348 | } | |
349 | ||
2283963f BF |
350 | static void release_open_stateid(struct nfs4_stateid *stp) |
351 | { | |
352 | unhash_generic_stateid(stp); | |
353 | release_stateid_lockowners(stp); | |
354 | nfsd_close(stp->st_vfs_file); | |
355 | free_generic_stateid(stp); | |
356 | } | |
357 | ||
f044ff83 | 358 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
359 | { |
360 | struct nfs4_stateid *stp; | |
361 | ||
362 | list_del(&sop->so_idhash); | |
363 | list_del(&sop->so_strhash); | |
f044ff83 BF |
364 | list_del(&sop->so_perclient); |
365 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 366 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
367 | stp = list_first_entry(&sop->so_stateids, |
368 | struct nfs4_stateid, st_perstateowner); | |
369 | release_open_stateid(stp); | |
f1d110ca BF |
370 | } |
371 | } | |
372 | ||
f044ff83 | 373 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 374 | { |
f044ff83 | 375 | unhash_openowner(sop); |
f1d110ca BF |
376 | list_del(&sop->so_close_lru); |
377 | nfs4_put_stateowner(sop); | |
378 | } | |
379 | ||
5282fd72 ME |
380 | #define SESSION_HASH_SIZE 512 |
381 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
382 | ||
383 | static inline int | |
384 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
385 | { | |
386 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
387 | ||
388 | return sid->sequence % SESSION_HASH_SIZE; | |
389 | } | |
390 | ||
391 | static inline void | |
392 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
393 | { | |
394 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
395 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
396 | } | |
397 | ||
ec6b5d7b AA |
398 | static void |
399 | gen_sessionid(struct nfsd4_session *ses) | |
400 | { | |
401 | struct nfs4_client *clp = ses->se_client; | |
402 | struct nfsd4_sessionid *sid; | |
403 | ||
404 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
405 | sid->clientid = clp->cl_clientid; | |
406 | sid->sequence = current_sessionid++; | |
407 | sid->reserved = 0; | |
408 | } | |
409 | ||
410 | /* | |
a649637c AA |
411 | * The protocol defines ca_maxresponssize_cached to include the size of |
412 | * the rpc header, but all we need to cache is the data starting after | |
413 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
414 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
415 | * value that is the number of bytes in our cache plus a few additional | |
416 | * bytes. In order to stay on the safe side, and not promise more than | |
417 | * we can cache, those additional bytes must be the minimum possible: 24 | |
418 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
419 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
420 | * for the SEQUENCE op response: | |
421 | */ | |
422 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
423 | ||
424 | /* | |
425 | * Give the client the number of ca_maxresponsesize_cached slots it | |
426 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
427 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
428 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 429 | * |
a649637c AA |
430 | * If we run out of reserved DRC memory we should (up to a point) |
431 | * re-negotiate active sessions and reduce their slot usage to make | |
432 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 433 | */ |
a649637c | 434 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 435 | { |
a649637c | 436 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 437 | |
5d77ddfb AA |
438 | if (fchan->maxreqs < 1) |
439 | return nfserr_inval; | |
5d77ddfb | 440 | |
a649637c AA |
441 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
442 | size = NFSD_MIN_HDR_SEQ_SZ; | |
443 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
444 | if (size > NFSD_SLOT_CACHE_SIZE) | |
445 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 446 | |
a649637c AA |
447 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
448 | mem = fchan->maxreqs * size; | |
449 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
450 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
451 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
452 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
453 | mem = fchan->maxreqs * size; | |
454 | } | |
ec6b5d7b | 455 | |
4bd9b0f4 | 456 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
457 | /* bound the total session drc memory ussage */ |
458 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
459 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
460 | mem = fchan->maxreqs * size; | |
461 | } | |
0c193054 | 462 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 463 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 464 | |
b101ebbc | 465 | if (fchan->maxreqs == 0) |
4731030d | 466 | return nfserr_jukebox; |
a649637c AA |
467 | |
468 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 469 | return 0; |
ec6b5d7b AA |
470 | } |
471 | ||
472 | /* | |
473 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 474 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
475 | */ |
476 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
477 | struct nfsd4_channel_attrs *session_fchan, |
478 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
479 | { |
480 | int status = 0; | |
ddc04fd4 | 481 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
482 | |
483 | /* headerpadsz set to zero in encode routine */ | |
484 | ||
485 | /* Use the client's max request and max response size if possible */ | |
486 | if (fchan->maxreq_sz > maxcount) | |
487 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 488 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
489 | |
490 | if (fchan->maxresp_sz > maxcount) | |
491 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 492 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 493 | |
ec6b5d7b AA |
494 | /* Use the client's maxops if possible */ |
495 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
496 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 497 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 498 | |
ec6b5d7b AA |
499 | /* FIXME: Error means no more DRC pages so the server should |
500 | * recover pages from existing sessions. For now fail session | |
501 | * creation. | |
502 | */ | |
a649637c | 503 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 504 | |
a649637c | 505 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 506 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
507 | |
508 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
509 | return status; |
510 | } | |
511 | ||
557ce264 AA |
512 | static void |
513 | free_session_slots(struct nfsd4_session *ses) | |
514 | { | |
515 | int i; | |
516 | ||
517 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
518 | kfree(ses->se_slots[i]); | |
519 | } | |
520 | ||
efe0cb6d BF |
521 | /* |
522 | * We don't actually need to cache the rpc and session headers, so we | |
523 | * can allocate a little less for each slot: | |
524 | */ | |
525 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
526 | { | |
527 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
528 | } | |
529 | ||
ec6b5d7b AA |
530 | static int |
531 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
532 | struct nfsd4_create_session *cses) | |
533 | { | |
534 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
535 | struct nfsd4_slot *sp; |
536 | int idx, slotsize, cachesize, i; | |
537 | int status; | |
ec6b5d7b AA |
538 | |
539 | memset(&tmp, 0, sizeof(tmp)); | |
540 | ||
541 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
542 | tmp.se_bchannel = cses->back_channel; |
543 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
544 | &cses->fore_channel); | |
ec6b5d7b AA |
545 | if (status) |
546 | goto out; | |
547 | ||
557ce264 AA |
548 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
549 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
550 | ||
4731030d | 551 | status = nfserr_jukebox; |
557ce264 AA |
552 | /* allocate struct nfsd4_session and slot table pointers in one piece */ |
553 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
554 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
555 | if (!new) | |
556 | goto out; | |
557 | ||
558 | memcpy(new, &tmp, sizeof(*new)); | |
559 | ||
557ce264 | 560 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 561 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
562 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
563 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
564 | if (!sp) | |
565 | goto out_free; | |
566 | new->se_slots[i] = sp; | |
567 | } | |
568 | ||
ec6b5d7b AA |
569 | new->se_client = clp; |
570 | gen_sessionid(new); | |
571 | idx = hash_sessionid(&new->se_sessionid); | |
572 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
573 | NFS4_MAX_SESSIONID_LEN); | |
574 | ||
575 | new->se_flags = cses->flags; | |
576 | kref_init(&new->se_ref); | |
9089f1b4 | 577 | spin_lock(&client_lock); |
ec6b5d7b AA |
578 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
579 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
9089f1b4 | 580 | spin_unlock(&client_lock); |
ec6b5d7b AA |
581 | |
582 | status = nfs_ok; | |
583 | out: | |
584 | return status; | |
557ce264 AA |
585 | out_free: |
586 | free_session_slots(new); | |
587 | kfree(new); | |
588 | goto out; | |
ec6b5d7b AA |
589 | } |
590 | ||
9089f1b4 | 591 | /* caller must hold client_lock */ |
5282fd72 ME |
592 | static struct nfsd4_session * |
593 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
594 | { | |
595 | struct nfsd4_session *elem; | |
596 | int idx; | |
597 | ||
598 | dump_sessionid(__func__, sessionid); | |
599 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
600 | /* Search in the appropriate list */ |
601 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
602 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
603 | NFS4_MAX_SESSIONID_LEN)) { | |
604 | return elem; | |
605 | } | |
606 | } | |
607 | ||
608 | dprintk("%s: session not found\n", __func__); | |
609 | return NULL; | |
610 | } | |
611 | ||
9089f1b4 | 612 | /* caller must hold client_lock */ |
7116ed6b | 613 | static void |
5282fd72 | 614 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
615 | { |
616 | list_del(&ses->se_hash); | |
617 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
618 | } |
619 | ||
7116ed6b AA |
620 | void |
621 | free_session(struct kref *kref) | |
622 | { | |
623 | struct nfsd4_session *ses; | |
dd829c45 | 624 | int mem; |
7116ed6b AA |
625 | |
626 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 627 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 628 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 629 | nfsd_drc_mem_used -= mem; |
be98d1bb | 630 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 631 | free_session_slots(ses); |
7116ed6b AA |
632 | kfree(ses); |
633 | } | |
634 | ||
36acb66b | 635 | /* must be called under the client_lock */ |
1da177e4 | 636 | static inline void |
36acb66b | 637 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 638 | { |
07cd4909 BH |
639 | if (is_client_expired(clp)) { |
640 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
641 | __func__, | |
642 | clp->cl_clientid.cl_boot, | |
643 | clp->cl_clientid.cl_id); | |
644 | return; | |
645 | } | |
646 | ||
1da177e4 LT |
647 | /* |
648 | * Move client to the end to the LRU list. | |
649 | */ | |
650 | dprintk("renewing client (clientid %08x/%08x)\n", | |
651 | clp->cl_clientid.cl_boot, | |
652 | clp->cl_clientid.cl_id); | |
653 | list_move_tail(&clp->cl_lru, &client_lru); | |
654 | clp->cl_time = get_seconds(); | |
655 | } | |
656 | ||
36acb66b BH |
657 | static inline void |
658 | renew_client(struct nfs4_client *clp) | |
659 | { | |
660 | spin_lock(&client_lock); | |
661 | renew_client_locked(clp); | |
662 | spin_unlock(&client_lock); | |
663 | } | |
664 | ||
1da177e4 LT |
665 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
666 | static int | |
667 | STALE_CLIENTID(clientid_t *clid) | |
668 | { | |
669 | if (clid->cl_boot == boot_time) | |
670 | return 0; | |
60adfc50 AA |
671 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
672 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
673 | return 1; |
674 | } | |
675 | ||
676 | /* | |
677 | * XXX Should we use a slab cache ? | |
678 | * This type of memory management is somewhat inefficient, but we use it | |
679 | * anyway since SETCLIENTID is not a common operation. | |
680 | */ | |
35bba9a3 | 681 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
682 | { |
683 | struct nfs4_client *clp; | |
684 | ||
35bba9a3 BF |
685 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
686 | if (clp == NULL) | |
687 | return NULL; | |
688 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
689 | if (clp->cl_name.data == NULL) { | |
690 | kfree(clp); | |
691 | return NULL; | |
1da177e4 | 692 | } |
35bba9a3 BF |
693 | memcpy(clp->cl_name.data, name.data, name.len); |
694 | clp->cl_name.len = name.len; | |
1da177e4 LT |
695 | return clp; |
696 | } | |
697 | ||
698 | static inline void | |
699 | free_client(struct nfs4_client *clp) | |
700 | { | |
701 | if (clp->cl_cred.cr_group_info) | |
702 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 703 | kfree(clp->cl_principal); |
1da177e4 LT |
704 | kfree(clp->cl_name.data); |
705 | kfree(clp); | |
706 | } | |
707 | ||
d7682988 BH |
708 | void |
709 | release_session_client(struct nfsd4_session *session) | |
710 | { | |
711 | struct nfs4_client *clp = session->se_client; | |
712 | ||
713 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
714 | return; | |
715 | if (is_client_expired(clp)) { | |
716 | free_client(clp); | |
717 | session->se_client = NULL; | |
718 | } else | |
719 | renew_client_locked(clp); | |
720 | spin_unlock(&client_lock); | |
d7682988 BH |
721 | } |
722 | ||
84d38ac9 BH |
723 | /* must be called under the client_lock */ |
724 | static inline void | |
725 | unhash_client_locked(struct nfs4_client *clp) | |
726 | { | |
07cd4909 | 727 | mark_client_expired(clp); |
84d38ac9 BH |
728 | list_del(&clp->cl_lru); |
729 | while (!list_empty(&clp->cl_sessions)) { | |
730 | struct nfsd4_session *ses; | |
731 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
732 | se_perclnt); | |
733 | unhash_session(ses); | |
734 | nfsd4_put_session(ses); | |
735 | } | |
736 | } | |
737 | ||
1da177e4 LT |
738 | static void |
739 | expire_client(struct nfs4_client *clp) | |
740 | { | |
741 | struct nfs4_stateowner *sop; | |
742 | struct nfs4_delegation *dp; | |
1da177e4 LT |
743 | struct list_head reaplist; |
744 | ||
1da177e4 LT |
745 | INIT_LIST_HEAD(&reaplist); |
746 | spin_lock(&recall_lock); | |
ea1da636 N |
747 | while (!list_empty(&clp->cl_delegations)) { |
748 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
749 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
750 | dp->dl_flock); | |
ea1da636 | 751 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
752 | list_move(&dp->dl_recall_lru, &reaplist); |
753 | } | |
754 | spin_unlock(&recall_lock); | |
755 | while (!list_empty(&reaplist)) { | |
756 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
757 | list_del_init(&dp->dl_recall_lru); | |
758 | unhash_delegation(dp); | |
759 | } | |
ea1da636 N |
760 | while (!list_empty(&clp->cl_openowners)) { |
761 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 762 | release_openowner(sop); |
1da177e4 | 763 | } |
84d38ac9 BH |
764 | nfsd4_set_callback_client(clp, NULL); |
765 | if (clp->cl_cb_conn.cb_xprt) | |
766 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
767 | list_del(&clp->cl_idhash); |
768 | list_del(&clp->cl_strhash); | |
be1fdf6c | 769 | spin_lock(&client_lock); |
84d38ac9 | 770 | unhash_client_locked(clp); |
46583e25 BH |
771 | if (atomic_read(&clp->cl_refcount) == 0) |
772 | free_client(clp); | |
be1fdf6c | 773 | spin_unlock(&client_lock); |
1da177e4 LT |
774 | } |
775 | ||
35bba9a3 BF |
776 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
777 | { | |
778 | memcpy(target->cl_verifier.data, source->data, | |
779 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
780 | } |
781 | ||
35bba9a3 BF |
782 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
783 | { | |
1da177e4 LT |
784 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
785 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
786 | } | |
787 | ||
35bba9a3 BF |
788 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
789 | { | |
1da177e4 LT |
790 | target->cr_uid = source->cr_uid; |
791 | target->cr_gid = source->cr_gid; | |
792 | target->cr_group_info = source->cr_group_info; | |
793 | get_group_info(target->cr_group_info); | |
794 | } | |
795 | ||
35bba9a3 | 796 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 797 | { |
a55370a3 | 798 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
799 | } |
800 | ||
801 | static int | |
599e0a22 BF |
802 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
803 | { | |
804 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
805 | } |
806 | ||
807 | static int | |
599e0a22 BF |
808 | same_clid(clientid_t *cl1, clientid_t *cl2) |
809 | { | |
810 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
811 | } |
812 | ||
813 | /* XXX what about NGROUP */ | |
814 | static int | |
599e0a22 BF |
815 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
816 | { | |
817 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
818 | } |
819 | ||
5ec7b46c BF |
820 | static void gen_clid(struct nfs4_client *clp) |
821 | { | |
822 | static u32 current_clientid = 1; | |
823 | ||
1da177e4 LT |
824 | clp->cl_clientid.cl_boot = boot_time; |
825 | clp->cl_clientid.cl_id = current_clientid++; | |
826 | } | |
827 | ||
deda2faa BF |
828 | static void gen_confirm(struct nfs4_client *clp) |
829 | { | |
830 | static u32 i; | |
831 | u32 *p; | |
1da177e4 | 832 | |
1da177e4 | 833 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
834 | *p++ = get_seconds(); |
835 | *p++ = i++; | |
1da177e4 LT |
836 | } |
837 | ||
b09333c4 RL |
838 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
839 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
840 | { | |
841 | struct nfs4_client *clp; | |
842 | struct sockaddr *sa = svc_addr(rqstp); | |
843 | char *princ; | |
844 | ||
845 | clp = alloc_client(name); | |
846 | if (clp == NULL) | |
847 | return NULL; | |
848 | ||
849 | princ = svc_gss_principal(rqstp); | |
850 | if (princ) { | |
851 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
852 | if (clp->cl_principal == NULL) { | |
853 | free_client(clp); | |
854 | return NULL; | |
855 | } | |
856 | } | |
857 | ||
858 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 859 | atomic_set(&clp->cl_refcount, 0); |
2bf23875 | 860 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
861 | INIT_LIST_HEAD(&clp->cl_idhash); |
862 | INIT_LIST_HEAD(&clp->cl_strhash); | |
863 | INIT_LIST_HEAD(&clp->cl_openowners); | |
864 | INIT_LIST_HEAD(&clp->cl_delegations); | |
865 | INIT_LIST_HEAD(&clp->cl_sessions); | |
866 | INIT_LIST_HEAD(&clp->cl_lru); | |
07cd4909 | 867 | clp->cl_time = get_seconds(); |
b09333c4 RL |
868 | clear_bit(0, &clp->cl_cb_slot_busy); |
869 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
870 | copy_verf(clp, verf); | |
871 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
872 | clp->cl_flavor = rqstp->rq_flavor; | |
873 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
874 | gen_confirm(clp); | |
875 | ||
876 | return clp; | |
877 | } | |
878 | ||
35bba9a3 BF |
879 | static int check_name(struct xdr_netobj name) |
880 | { | |
1da177e4 LT |
881 | if (name.len == 0) |
882 | return 0; | |
883 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 884 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
885 | return 0; |
886 | } | |
887 | return 1; | |
888 | } | |
889 | ||
fd39ca9a | 890 | static void |
1da177e4 LT |
891 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
892 | { | |
893 | unsigned int idhashval; | |
894 | ||
895 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
896 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
897 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 898 | renew_client(clp); |
1da177e4 LT |
899 | } |
900 | ||
fd39ca9a | 901 | static void |
1da177e4 LT |
902 | move_to_confirmed(struct nfs4_client *clp) |
903 | { | |
904 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
905 | unsigned int strhashval; | |
906 | ||
907 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 908 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 909 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 910 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
911 | renew_client(clp); |
912 | } | |
913 | ||
914 | static struct nfs4_client * | |
915 | find_confirmed_client(clientid_t *clid) | |
916 | { | |
917 | struct nfs4_client *clp; | |
918 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
919 | ||
920 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 921 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
922 | return clp; |
923 | } | |
924 | return NULL; | |
925 | } | |
926 | ||
927 | static struct nfs4_client * | |
928 | find_unconfirmed_client(clientid_t *clid) | |
929 | { | |
930 | struct nfs4_client *clp; | |
931 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
932 | ||
933 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 934 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
935 | return clp; |
936 | } | |
937 | return NULL; | |
938 | } | |
939 | ||
a1bcecd2 AA |
940 | /* |
941 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
942 | * parameter. Matching is based on the fact the at least one of the | |
943 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
944 | * | |
945 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
946 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
947 | * and SET_CLIENTID{,_CONFIRM} | |
948 | */ | |
949 | static inline int | |
950 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
951 | { | |
952 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
953 | return use_exchange_id == has_exchange_flags; | |
954 | } | |
955 | ||
28ce6054 | 956 | static struct nfs4_client * |
a1bcecd2 AA |
957 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
958 | bool use_exchange_id) | |
28ce6054 N |
959 | { |
960 | struct nfs4_client *clp; | |
961 | ||
962 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
963 | if (same_name(clp->cl_recdir, dname) && |
964 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
965 | return clp; |
966 | } | |
967 | return NULL; | |
968 | } | |
969 | ||
970 | static struct nfs4_client * | |
a1bcecd2 AA |
971 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
972 | bool use_exchange_id) | |
28ce6054 N |
973 | { |
974 | struct nfs4_client *clp; | |
975 | ||
976 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
977 | if (same_name(clp->cl_recdir, dname) && |
978 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
979 | return clp; |
980 | } | |
981 | return NULL; | |
982 | } | |
983 | ||
fd39ca9a | 984 | static void |
fbf4665f | 985 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 986 | { |
c237dc03 | 987 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
988 | unsigned short expected_family; |
989 | ||
990 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
991 | if (se->se_callback_netid_len == 3 && | |
992 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
993 | expected_family = AF_INET; | |
994 | else if (se->se_callback_netid_len == 4 && | |
995 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
996 | expected_family = AF_INET6; | |
997 | else | |
1da177e4 LT |
998 | goto out_err; |
999 | ||
aa9a4ec7 JL |
1000 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
1001 | se->se_callback_addr_len, | |
1002 | (struct sockaddr *) &cb->cb_addr, | |
1003 | sizeof(cb->cb_addr)); | |
1004 | ||
7077ecba | 1005 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 1006 | goto out_err; |
aa9a4ec7 | 1007 | |
fbf4665f JL |
1008 | if (cb->cb_addr.ss_family == AF_INET6) |
1009 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
1010 | ||
ab52ae6d | 1011 | cb->cb_minorversion = 0; |
1da177e4 LT |
1012 | cb->cb_prog = se->se_callback_prog; |
1013 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1014 | return; |
1015 | out_err: | |
aa9a4ec7 JL |
1016 | cb->cb_addr.ss_family = AF_UNSPEC; |
1017 | cb->cb_addrlen = 0; | |
849823c5 | 1018 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1019 | "will not receive delegations\n", |
1020 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1021 | ||
1da177e4 LT |
1022 | return; |
1023 | } | |
1024 | ||
074fe897 | 1025 | /* |
557ce264 | 1026 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1027 | */ |
074fe897 AA |
1028 | void |
1029 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1030 | { |
557ce264 AA |
1031 | struct nfsd4_slot *slot = resp->cstate.slot; |
1032 | unsigned int base; | |
074fe897 | 1033 | |
557ce264 | 1034 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1035 | |
557ce264 AA |
1036 | slot->sl_opcnt = resp->opcnt; |
1037 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1038 | |
bf864a31 | 1039 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1040 | slot->sl_datalen = 0; |
bf864a31 | 1041 | return; |
074fe897 | 1042 | } |
557ce264 AA |
1043 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1044 | base = (char *)resp->cstate.datap - | |
1045 | (char *)resp->xbuf->head[0].iov_base; | |
1046 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1047 | slot->sl_datalen)) | |
1048 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1049 | return; | |
074fe897 AA |
1050 | } |
1051 | ||
1052 | /* | |
abfabf8c AA |
1053 | * Encode the replay sequence operation from the slot values. |
1054 | * If cachethis is FALSE encode the uncached rep error on the next | |
1055 | * operation which sets resp->p and increments resp->opcnt for | |
1056 | * nfs4svc_encode_compoundres. | |
074fe897 | 1057 | * |
074fe897 | 1058 | */ |
abfabf8c AA |
1059 | static __be32 |
1060 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1061 | struct nfsd4_compoundres *resp) | |
074fe897 | 1062 | { |
abfabf8c AA |
1063 | struct nfsd4_op *op; |
1064 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1065 | |
abfabf8c | 1066 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1067 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1068 | |
abfabf8c AA |
1069 | /* Encode the replayed sequence operation */ |
1070 | op = &args->ops[resp->opcnt - 1]; | |
1071 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1072 | |
abfabf8c | 1073 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1074 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1075 | op = &args->ops[resp->opcnt++]; |
1076 | op->status = nfserr_retry_uncached_rep; | |
1077 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1078 | } |
abfabf8c | 1079 | return op->status; |
074fe897 AA |
1080 | } |
1081 | ||
1082 | /* | |
557ce264 AA |
1083 | * The sequence operation is not cached because we can use the slot and |
1084 | * session values. | |
074fe897 AA |
1085 | */ |
1086 | __be32 | |
bf864a31 AA |
1087 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1088 | struct nfsd4_sequence *seq) | |
074fe897 | 1089 | { |
557ce264 | 1090 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1091 | __be32 status; |
1092 | ||
557ce264 | 1093 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1094 | |
abfabf8c AA |
1095 | /* Either returns 0 or nfserr_retry_uncached */ |
1096 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1097 | if (status == nfserr_retry_uncached_rep) | |
1098 | return status; | |
074fe897 | 1099 | |
557ce264 AA |
1100 | /* The sequence operation has been encoded, cstate->datap set. */ |
1101 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1102 | |
557ce264 AA |
1103 | resp->opcnt = slot->sl_opcnt; |
1104 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1105 | status = slot->sl_status; | |
074fe897 AA |
1106 | |
1107 | return status; | |
1108 | } | |
1109 | ||
0733d213 AA |
1110 | /* |
1111 | * Set the exchange_id flags returned by the server. | |
1112 | */ | |
1113 | static void | |
1114 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1115 | { | |
1116 | /* pNFS is not supported */ | |
1117 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1118 | ||
1119 | /* Referrals are supported, Migration is not. */ | |
1120 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1121 | ||
1122 | /* set the wire flags to return to client. */ | |
1123 | clid->flags = new->cl_exchange_flags; | |
1124 | } | |
1125 | ||
069b6ad4 AA |
1126 | __be32 |
1127 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1128 | struct nfsd4_compound_state *cstate, | |
1129 | struct nfsd4_exchange_id *exid) | |
1130 | { | |
0733d213 AA |
1131 | struct nfs4_client *unconf, *conf, *new; |
1132 | int status; | |
1133 | unsigned int strhashval; | |
1134 | char dname[HEXDIR_LEN]; | |
363168b4 | 1135 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1136 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1137 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1138 | |
363168b4 | 1139 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1140 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1141 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1142 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1143 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1144 | |
1145 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1146 | return nfserr_inval; | |
1147 | ||
1148 | /* Currently only support SP4_NONE */ | |
1149 | switch (exid->spa_how) { | |
1150 | case SP4_NONE: | |
1151 | break; | |
1152 | case SP4_SSV: | |
1153 | return nfserr_encr_alg_unsupp; | |
1154 | default: | |
1155 | BUG(); /* checked by xdr code */ | |
1156 | case SP4_MACH_CRED: | |
1157 | return nfserr_serverfault; /* no excuse :-/ */ | |
1158 | } | |
1159 | ||
1160 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1161 | ||
1162 | if (status) | |
1163 | goto error; | |
1164 | ||
1165 | strhashval = clientstr_hashval(dname); | |
1166 | ||
1167 | nfs4_lock_state(); | |
1168 | status = nfs_ok; | |
1169 | ||
a1bcecd2 | 1170 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1171 | if (conf) { |
1172 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1173 | /* 18.35.4 case 8 */ | |
1174 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1175 | status = nfserr_not_same; | |
1176 | goto out; | |
1177 | } | |
1178 | /* Client reboot: destroy old state */ | |
1179 | expire_client(conf); | |
1180 | goto out_new; | |
1181 | } | |
1182 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1183 | /* 18.35.4 case 9 */ | |
1184 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1185 | status = nfserr_perm; | |
1186 | goto out; | |
1187 | } | |
1188 | expire_client(conf); | |
1189 | goto out_new; | |
1190 | } | |
0733d213 AA |
1191 | /* |
1192 | * Set bit when the owner id and verifier map to an already | |
1193 | * confirmed client id (18.35.3). | |
1194 | */ | |
1195 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1196 | ||
1197 | /* | |
1198 | * Falling into 18.35.4 case 2, possible router replay. | |
1199 | * Leave confirmed record intact and return same result. | |
1200 | */ | |
1201 | copy_verf(conf, &verf); | |
1202 | new = conf; | |
1203 | goto out_copy; | |
6ddbbbfe MS |
1204 | } |
1205 | ||
1206 | /* 18.35.4 case 7 */ | |
1207 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1208 | status = nfserr_noent; | |
1209 | goto out; | |
0733d213 AA |
1210 | } |
1211 | ||
a1bcecd2 | 1212 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1213 | if (unconf) { |
1214 | /* | |
1215 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1216 | * a new unconfirmed record should be generated regardless | |
1217 | * of whether any properties have changed. | |
1218 | */ | |
1219 | expire_client(unconf); | |
1220 | } | |
1221 | ||
1222 | out_new: | |
1223 | /* Normal case */ | |
b09333c4 | 1224 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1225 | if (new == NULL) { |
4731030d | 1226 | status = nfserr_jukebox; |
0733d213 AA |
1227 | goto out; |
1228 | } | |
1229 | ||
0733d213 | 1230 | gen_clid(new); |
0733d213 AA |
1231 | add_to_unconfirmed(new, strhashval); |
1232 | out_copy: | |
1233 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1234 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1235 | ||
38eb76a5 | 1236 | exid->seqid = 1; |
0733d213 AA |
1237 | nfsd4_set_ex_flags(new, exid); |
1238 | ||
1239 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1240 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1241 | status = nfs_ok; |
1242 | ||
1243 | out: | |
1244 | nfs4_unlock_state(); | |
1245 | error: | |
1246 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1247 | return status; | |
069b6ad4 AA |
1248 | } |
1249 | ||
b85d4c01 | 1250 | static int |
88e588d5 | 1251 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1252 | { |
88e588d5 AA |
1253 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1254 | slot_seqid); | |
b85d4c01 BH |
1255 | |
1256 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1257 | if (slot_inuse) { |
1258 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1259 | return nfserr_jukebox; |
1260 | else | |
1261 | return nfserr_seq_misordered; | |
1262 | } | |
1263 | /* Normal */ | |
88e588d5 | 1264 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1265 | return nfs_ok; |
1266 | /* Replay */ | |
88e588d5 | 1267 | if (seqid == slot_seqid) |
b85d4c01 BH |
1268 | return nfserr_replay_cache; |
1269 | /* Wraparound */ | |
88e588d5 | 1270 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1271 | return nfs_ok; |
1272 | /* Misordered replay or misordered new request */ | |
1273 | return nfserr_seq_misordered; | |
1274 | } | |
1275 | ||
49557cc7 AA |
1276 | /* |
1277 | * Cache the create session result into the create session single DRC | |
1278 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1279 | * Do this for solo or embedded create session operations. | |
1280 | */ | |
1281 | static void | |
1282 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1283 | struct nfsd4_clid_slot *slot, int nfserr) | |
1284 | { | |
1285 | slot->sl_status = nfserr; | |
1286 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1287 | } | |
1288 | ||
1289 | static __be32 | |
1290 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1291 | struct nfsd4_clid_slot *slot) | |
1292 | { | |
1293 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1294 | return slot->sl_status; | |
1295 | } | |
1296 | ||
069b6ad4 AA |
1297 | __be32 |
1298 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1299 | struct nfsd4_compound_state *cstate, | |
1300 | struct nfsd4_create_session *cr_ses) | |
1301 | { | |
363168b4 | 1302 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1303 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1304 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1305 | int status = 0; |
1306 | ||
1307 | nfs4_lock_state(); | |
1308 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1309 | conf = find_confirmed_client(&cr_ses->clientid); | |
1310 | ||
1311 | if (conf) { | |
49557cc7 AA |
1312 | cs_slot = &conf->cl_cs_slot; |
1313 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1314 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1315 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1316 | cs_slot->sl_seqid); |
38eb76a5 | 1317 | /* Return the cached reply status */ |
49557cc7 | 1318 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1319 | goto out; |
49557cc7 | 1320 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1321 | status = nfserr_seq_misordered; |
1322 | dprintk("Sequence misordered!\n"); | |
1323 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1324 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1325 | goto out; |
1326 | } | |
49557cc7 | 1327 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1328 | } else if (unconf) { |
1329 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1330 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1331 | status = nfserr_clid_inuse; |
1332 | goto out; | |
1333 | } | |
1334 | ||
49557cc7 AA |
1335 | cs_slot = &unconf->cl_cs_slot; |
1336 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1337 | if (status) { |
1338 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1339 | status = nfserr_seq_misordered; |
49557cc7 | 1340 | goto out_cache; |
ec6b5d7b AA |
1341 | } |
1342 | ||
49557cc7 | 1343 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1344 | move_to_confirmed(unconf); |
1345 | ||
38524ab3 | 1346 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
2bf23875 BF |
1347 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
1348 | svc_xprt_get(rqstp->rq_xprt); | |
38524ab3 AA |
1349 | rpc_copy_addr( |
1350 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1351 | sa); | |
1352 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1353 | unconf->cl_cb_conn.cb_minorversion = | |
1354 | cstate->minorversion; | |
1355 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1356 | unconf->cl_cb_seq_nr = 1; |
4b21d0de | 1357 | nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); |
38524ab3 | 1358 | } |
ec6b5d7b AA |
1359 | conf = unconf; |
1360 | } else { | |
1361 | status = nfserr_stale_clientid; | |
1362 | goto out; | |
1363 | } | |
1364 | ||
408b79bc BF |
1365 | /* |
1366 | * We do not support RDMA or persistent sessions | |
1367 | */ | |
1368 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1369 | cr_ses->flags &= ~SESSION4_RDMA; | |
1370 | ||
ec6b5d7b AA |
1371 | status = alloc_init_session(rqstp, conf, cr_ses); |
1372 | if (status) | |
1373 | goto out; | |
1374 | ||
ec6b5d7b AA |
1375 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1376 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1377 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1378 | |
49557cc7 AA |
1379 | out_cache: |
1380 | /* cache solo and embedded create sessions under the state lock */ | |
1381 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1382 | out: |
1383 | nfs4_unlock_state(); | |
1384 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1385 | return status; | |
069b6ad4 AA |
1386 | } |
1387 | ||
57716355 BF |
1388 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1389 | { | |
1390 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1391 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1392 | ||
1393 | return argp->opcnt == resp->opcnt; | |
1394 | } | |
1395 | ||
5d4cec2f BF |
1396 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1397 | { | |
1398 | if (!session) | |
1399 | return 0; | |
1400 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1401 | } | |
1402 | ||
069b6ad4 AA |
1403 | __be32 |
1404 | nfsd4_destroy_session(struct svc_rqst *r, | |
1405 | struct nfsd4_compound_state *cstate, | |
1406 | struct nfsd4_destroy_session *sessionid) | |
1407 | { | |
e10e0cfc BH |
1408 | struct nfsd4_session *ses; |
1409 | u32 status = nfserr_badsession; | |
1410 | ||
1411 | /* Notes: | |
1412 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1413 | * - Should we return nfserr_back_chan_busy if waiting for | |
1414 | * callbacks on to-be-destroyed session? | |
1415 | * - Do we need to clear any callback info from previous session? | |
1416 | */ | |
1417 | ||
5d4cec2f | 1418 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1419 | if (!nfsd4_last_compound_op(r)) |
1420 | return nfserr_not_only_op; | |
1421 | } | |
e10e0cfc | 1422 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1423 | spin_lock(&client_lock); |
e10e0cfc BH |
1424 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1425 | if (!ses) { | |
9089f1b4 | 1426 | spin_unlock(&client_lock); |
e10e0cfc BH |
1427 | goto out; |
1428 | } | |
1429 | ||
1430 | unhash_session(ses); | |
9089f1b4 | 1431 | spin_unlock(&client_lock); |
e10e0cfc | 1432 | |
ab707e15 | 1433 | nfs4_lock_state(); |
e10e0cfc | 1434 | /* wait for callbacks */ |
b5a1a81e | 1435 | nfsd4_set_callback_client(ses->se_client, NULL); |
ab707e15 | 1436 | nfs4_unlock_state(); |
e10e0cfc BH |
1437 | nfsd4_put_session(ses); |
1438 | status = nfs_ok; | |
1439 | out: | |
1440 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1441 | return status; | |
069b6ad4 AA |
1442 | } |
1443 | ||
1444 | __be32 | |
b85d4c01 | 1445 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1446 | struct nfsd4_compound_state *cstate, |
1447 | struct nfsd4_sequence *seq) | |
1448 | { | |
f9bb94c4 | 1449 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1450 | struct nfsd4_session *session; |
1451 | struct nfsd4_slot *slot; | |
1452 | int status; | |
1453 | ||
f9bb94c4 AA |
1454 | if (resp->opcnt != 1) |
1455 | return nfserr_sequence_pos; | |
1456 | ||
9089f1b4 | 1457 | spin_lock(&client_lock); |
b85d4c01 BH |
1458 | status = nfserr_badsession; |
1459 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1460 | if (!session) | |
1461 | goto out; | |
1462 | ||
1463 | status = nfserr_badslot; | |
6c18ba9f | 1464 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1465 | goto out; |
1466 | ||
557ce264 | 1467 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1468 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1469 | ||
a8dfdaeb AA |
1470 | /* We do not negotiate the number of slots yet, so set the |
1471 | * maxslots to the session maxreqs which is used to encode | |
1472 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1473 | seq->maxslots = session->se_fchannel.maxreqs; | |
1474 | ||
88e588d5 | 1475 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1476 | if (status == nfserr_replay_cache) { |
1477 | cstate->slot = slot; | |
1478 | cstate->session = session; | |
da3846a2 | 1479 | /* Return the cached reply status and set cstate->status |
557ce264 | 1480 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1481 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1482 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1483 | goto out; |
b85d4c01 BH |
1484 | } |
1485 | if (status) | |
1486 | goto out; | |
1487 | ||
1488 | /* Success! bump slot seqid */ | |
1489 | slot->sl_inuse = true; | |
1490 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1491 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1492 | |
1493 | cstate->slot = slot; | |
1494 | cstate->session = session; | |
1495 | ||
b85d4c01 | 1496 | out: |
26c0c75e | 1497 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1498 | if (cstate->session) { |
36acb66b | 1499 | nfsd4_get_session(cstate->session); |
d7682988 | 1500 | atomic_inc(&session->se_client->cl_refcount); |
aaf84eb9 | 1501 | } |
36acb66b | 1502 | spin_unlock(&client_lock); |
b85d4c01 BH |
1503 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1504 | return status; | |
069b6ad4 AA |
1505 | } |
1506 | ||
4dc6ec00 BF |
1507 | __be32 |
1508 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1509 | { | |
1510 | if (rc->rca_one_fs) { | |
1511 | if (!cstate->current_fh.fh_dentry) | |
1512 | return nfserr_nofilehandle; | |
1513 | /* | |
1514 | * We don't take advantage of the rca_one_fs case. | |
1515 | * That's OK, it's optional, we can safely ignore it. | |
1516 | */ | |
1517 | return nfs_ok; | |
1518 | } | |
1519 | nfs4_lock_state(); | |
1520 | if (is_client_expired(cstate->session->se_client)) { | |
1521 | nfs4_unlock_state(); | |
1522 | /* | |
1523 | * The following error isn't really legal. | |
1524 | * But we only get here if the client just explicitly | |
1525 | * destroyed the client. Surely it no longer cares what | |
1526 | * error it gets back on an operation for the dead | |
1527 | * client. | |
1528 | */ | |
1529 | return nfserr_stale_clientid; | |
1530 | } | |
1531 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1532 | nfs4_unlock_state(); | |
1533 | return nfs_ok; | |
1534 | } | |
1535 | ||
b37ad28b | 1536 | __be32 |
b591480b BF |
1537 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1538 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1539 | { |
363168b4 | 1540 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1541 | struct xdr_netobj clname = { |
1542 | .len = setclid->se_namelen, | |
1543 | .data = setclid->se_name, | |
1544 | }; | |
1545 | nfs4_verifier clverifier = setclid->se_verf; | |
1546 | unsigned int strhashval; | |
28ce6054 | 1547 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1548 | __be32 status; |
a55370a3 | 1549 | char dname[HEXDIR_LEN]; |
1da177e4 | 1550 | |
1da177e4 | 1551 | if (!check_name(clname)) |
73aea4ec | 1552 | return nfserr_inval; |
1da177e4 | 1553 | |
a55370a3 N |
1554 | status = nfs4_make_rec_clidname(dname, &clname); |
1555 | if (status) | |
73aea4ec | 1556 | return status; |
a55370a3 | 1557 | |
1da177e4 LT |
1558 | /* |
1559 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1560 | * We get here on a DRC miss. | |
1561 | */ | |
1562 | ||
a55370a3 | 1563 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1564 | |
1da177e4 | 1565 | nfs4_lock_state(); |
a1bcecd2 | 1566 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1567 | if (conf) { |
a186e767 | 1568 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1569 | status = nfserr_clid_inuse; |
026722c2 | 1570 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1571 | char addr_str[INET6_ADDRSTRLEN]; |
1572 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1573 | sizeof(addr_str)); | |
1574 | dprintk("NFSD: setclientid: string in use by client " | |
1575 | "at %s\n", addr_str); | |
1da177e4 LT |
1576 | goto out; |
1577 | } | |
1da177e4 | 1578 | } |
a186e767 BF |
1579 | /* |
1580 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1581 | * has a description of SETCLIENTID request processing consisting | |
1582 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1583 | */ | |
a1bcecd2 | 1584 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1585 | status = nfserr_resource; |
1586 | if (!conf) { | |
a186e767 BF |
1587 | /* |
1588 | * RFC 3530 14.2.33 CASE 4: | |
1589 | * placed first, because it is the normal case | |
1da177e4 LT |
1590 | */ |
1591 | if (unconf) | |
1592 | expire_client(unconf); | |
b09333c4 | 1593 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1594 | if (new == NULL) |
1da177e4 | 1595 | goto out; |
1da177e4 | 1596 | gen_clid(new); |
599e0a22 | 1597 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1598 | /* |
a186e767 BF |
1599 | * RFC 3530 14.2.33 CASE 1: |
1600 | * probable callback update | |
1da177e4 | 1601 | */ |
31f4a6c1 N |
1602 | if (unconf) { |
1603 | /* Note this is removing unconfirmed {*x***}, | |
1604 | * which is stronger than RFC recommended {vxc**}. | |
1605 | * This has the advantage that there is at most | |
1606 | * one {*x***} in either list at any time. | |
1607 | */ | |
1608 | expire_client(unconf); | |
1da177e4 | 1609 | } |
b09333c4 | 1610 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1611 | if (new == NULL) |
1da177e4 | 1612 | goto out; |
1da177e4 | 1613 | copy_clid(new, conf); |
1da177e4 LT |
1614 | } else if (!unconf) { |
1615 | /* | |
a186e767 BF |
1616 | * RFC 3530 14.2.33 CASE 2: |
1617 | * probable client reboot; state will be removed if | |
1618 | * confirmed. | |
1da177e4 | 1619 | */ |
b09333c4 | 1620 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1621 | if (new == NULL) |
1da177e4 | 1622 | goto out; |
1da177e4 | 1623 | gen_clid(new); |
49ba8781 | 1624 | } else { |
a186e767 BF |
1625 | /* |
1626 | * RFC 3530 14.2.33 CASE 3: | |
1627 | * probable client reboot; state will be removed if | |
1628 | * confirmed. | |
1da177e4 LT |
1629 | */ |
1630 | expire_client(unconf); | |
b09333c4 | 1631 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1632 | if (new == NULL) |
1da177e4 | 1633 | goto out; |
1da177e4 | 1634 | gen_clid(new); |
1da177e4 | 1635 | } |
fbf4665f | 1636 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1637 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1638 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1639 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1640 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1641 | status = nfs_ok; | |
1642 | out: | |
1643 | nfs4_unlock_state(); | |
1644 | return status; | |
1645 | } | |
1646 | ||
1647 | ||
1648 | /* | |
a186e767 BF |
1649 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1650 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1651 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1652 | */ |
b37ad28b | 1653 | __be32 |
b591480b BF |
1654 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1655 | struct nfsd4_compound_state *cstate, | |
1656 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1657 | { |
363168b4 | 1658 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1659 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1660 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1661 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1662 | __be32 status; |
1da177e4 LT |
1663 | |
1664 | if (STALE_CLIENTID(clid)) | |
1665 | return nfserr_stale_clientid; | |
1666 | /* | |
1667 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1668 | * We get here on a DRC miss. | |
1669 | */ | |
1670 | ||
1671 | nfs4_lock_state(); | |
21ab45a4 N |
1672 | |
1673 | conf = find_confirmed_client(clid); | |
1674 | unconf = find_unconfirmed_client(clid); | |
1675 | ||
1676 | status = nfserr_clid_inuse; | |
363168b4 | 1677 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1678 | goto out; |
363168b4 | 1679 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1680 | goto out; |
1681 | ||
a186e767 BF |
1682 | /* |
1683 | * section 14.2.34 of RFC 3530 has a description of | |
1684 | * SETCLIENTID_CONFIRM request processing consisting | |
1685 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1686 | */ | |
366e0c1d | 1687 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1688 | /* |
1689 | * RFC 3530 14.2.34 CASE 1: | |
1690 | * callback update | |
1691 | */ | |
599e0a22 | 1692 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1693 | status = nfserr_clid_inuse; |
1694 | else { | |
2bf23875 | 1695 | atomic_set(&conf->cl_cb_set, 0); |
4b21d0de | 1696 | nfsd4_probe_callback(conf, &unconf->cl_cb_conn); |
1a69c179 | 1697 | expire_client(unconf); |
1da177e4 | 1698 | status = nfs_ok; |
1a69c179 | 1699 | |
1da177e4 | 1700 | } |
f3aba4e5 | 1701 | } else if (conf && !unconf) { |
a186e767 BF |
1702 | /* |
1703 | * RFC 3530 14.2.34 CASE 2: | |
1704 | * probable retransmitted request; play it safe and | |
1705 | * do nothing. | |
7c79f737 | 1706 | */ |
599e0a22 | 1707 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1708 | status = nfserr_clid_inuse; |
21ab45a4 | 1709 | else |
1da177e4 | 1710 | status = nfs_ok; |
7c79f737 | 1711 | } else if (!conf && unconf |
599e0a22 | 1712 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1713 | /* |
1714 | * RFC 3530 14.2.34 CASE 3: | |
1715 | * Normal case; new or rebooted client: | |
7c79f737 | 1716 | */ |
599e0a22 | 1717 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1718 | status = nfserr_clid_inuse; |
1719 | } else { | |
1a69c179 N |
1720 | unsigned int hash = |
1721 | clientstr_hashval(unconf->cl_recdir); | |
1722 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1723 | hash, false); |
1a69c179 | 1724 | if (conf) { |
c7b9a459 | 1725 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1726 | expire_client(conf); |
1727 | } | |
1da177e4 | 1728 | move_to_confirmed(unconf); |
21ab45a4 | 1729 | conf = unconf; |
4b21d0de | 1730 | nfsd4_probe_callback(conf, &conf->cl_cb_conn); |
1a69c179 | 1731 | status = nfs_ok; |
1da177e4 | 1732 | } |
599e0a22 BF |
1733 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1734 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1735 | &confirm)))) { |
a186e767 BF |
1736 | /* |
1737 | * RFC 3530 14.2.34 CASE 4: | |
1738 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1739 | */ |
1da177e4 | 1740 | status = nfserr_stale_clientid; |
7c79f737 | 1741 | } else { |
08e8987c N |
1742 | /* check that we have hit one of the cases...*/ |
1743 | status = nfserr_clid_inuse; | |
1744 | } | |
1da177e4 | 1745 | out: |
1da177e4 LT |
1746 | nfs4_unlock_state(); |
1747 | return status; | |
1748 | } | |
1749 | ||
1da177e4 LT |
1750 | /* OPEN Share state helper functions */ |
1751 | static inline struct nfs4_file * | |
1752 | alloc_init_file(struct inode *ino) | |
1753 | { | |
1754 | struct nfs4_file *fp; | |
1755 | unsigned int hashval = file_hashval(ino); | |
1756 | ||
e60d4398 N |
1757 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1758 | if (fp) { | |
8b671b80 | 1759 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1760 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1761 | INIT_LIST_HEAD(&fp->fi_stateids); |
1762 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1763 | fp->fi_inode = igrab(ino); |
1764 | fp->fi_id = current_fileid++; | |
47f9940c | 1765 | fp->fi_had_conflict = false; |
47cee541 PE |
1766 | spin_lock(&recall_lock); |
1767 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
1768 | spin_unlock(&recall_lock); | |
1da177e4 LT |
1769 | return fp; |
1770 | } | |
1771 | return NULL; | |
1772 | } | |
1773 | ||
e60d4398 | 1774 | static void |
e18b890b | 1775 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1776 | { |
e60d4398 N |
1777 | if (*slab == NULL) |
1778 | return; | |
1a1d92c1 | 1779 | kmem_cache_destroy(*slab); |
e60d4398 | 1780 | *slab = NULL; |
1da177e4 LT |
1781 | } |
1782 | ||
e8ff2a84 | 1783 | void |
1da177e4 LT |
1784 | nfsd4_free_slabs(void) |
1785 | { | |
e60d4398 N |
1786 | nfsd4_free_slab(&stateowner_slab); |
1787 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1788 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1789 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1790 | } |
1da177e4 | 1791 | |
e60d4398 N |
1792 | static int |
1793 | nfsd4_init_slabs(void) | |
1794 | { | |
1795 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1796 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1797 | if (stateowner_slab == NULL) |
1798 | goto out_nomem; | |
1799 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1800 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1801 | if (file_slab == NULL) |
1802 | goto out_nomem; | |
5ac049ac | 1803 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1804 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1805 | if (stateid_slab == NULL) |
1806 | goto out_nomem; | |
5b2d21c1 | 1807 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1808 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1809 | if (deleg_slab == NULL) |
1810 | goto out_nomem; | |
e60d4398 N |
1811 | return 0; |
1812 | out_nomem: | |
1813 | nfsd4_free_slabs(); | |
1814 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1815 | return -ENOMEM; | |
1da177e4 LT |
1816 | } |
1817 | ||
1818 | void | |
1819 | nfs4_free_stateowner(struct kref *kref) | |
1820 | { | |
1821 | struct nfs4_stateowner *sop = | |
1822 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1823 | kfree(sop->so_owner.data); | |
1824 | kmem_cache_free(stateowner_slab, sop); | |
1825 | } | |
1826 | ||
1827 | static inline struct nfs4_stateowner * | |
1828 | alloc_stateowner(struct xdr_netobj *owner) | |
1829 | { | |
1830 | struct nfs4_stateowner *sop; | |
1831 | ||
1832 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1833 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1834 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1835 | sop->so_owner.len = owner->len; | |
1836 | kref_init(&sop->so_ref); | |
1837 | return sop; | |
1838 | } | |
1839 | kmem_cache_free(stateowner_slab, sop); | |
1840 | } | |
1841 | return NULL; | |
1842 | } | |
1843 | ||
1844 | static struct nfs4_stateowner * | |
1845 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1846 | struct nfs4_stateowner *sop; | |
1847 | struct nfs4_replay *rp; | |
1848 | unsigned int idhashval; | |
1849 | ||
1850 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1851 | return NULL; | |
1852 | idhashval = ownerid_hashval(current_ownerid); | |
1853 | INIT_LIST_HEAD(&sop->so_idhash); | |
1854 | INIT_LIST_HEAD(&sop->so_strhash); | |
1855 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1856 | INIT_LIST_HEAD(&sop->so_stateids); |
1857 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1858 | INIT_LIST_HEAD(&sop->so_close_lru); |
1859 | sop->so_time = 0; | |
1860 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1861 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1862 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1863 | sop->so_is_open_owner = 1; |
1864 | sop->so_id = current_ownerid++; | |
1865 | sop->so_client = clp; | |
1866 | sop->so_seqid = open->op_seqid; | |
1867 | sop->so_confirmed = 0; | |
1868 | rp = &sop->so_replay; | |
de1ae286 | 1869 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1870 | rp->rp_buflen = 0; |
1871 | rp->rp_buf = rp->rp_ibuf; | |
1872 | return sop; | |
1873 | } | |
1874 | ||
1da177e4 LT |
1875 | static inline void |
1876 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1877 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1878 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1879 | ||
1880 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1881 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1882 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1883 | INIT_LIST_HEAD(&stp->st_perfile); |
1884 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1885 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1886 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1887 | stp->st_stateowner = sop; |
13cd2184 | 1888 | get_nfs4_file(fp); |
1da177e4 | 1889 | stp->st_file = fp; |
e4e83ea4 | 1890 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
1891 | stp->st_stateid.si_stateownerid = sop->so_id; |
1892 | stp->st_stateid.si_fileid = fp->fi_id; | |
1893 | stp->st_stateid.si_generation = 0; | |
1894 | stp->st_access_bmap = 0; | |
1895 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1896 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1897 | &stp->st_access_bmap); | |
1da177e4 | 1898 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1899 | stp->st_openstp = NULL; |
1da177e4 LT |
1900 | } |
1901 | ||
fd39ca9a | 1902 | static void |
1da177e4 LT |
1903 | move_to_close_lru(struct nfs4_stateowner *sop) |
1904 | { | |
1905 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1906 | ||
358dd55a | 1907 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1908 | sop->so_time = get_seconds(); |
1909 | } | |
1910 | ||
1da177e4 | 1911 | static int |
599e0a22 BF |
1912 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1913 | clientid_t *clid) | |
1914 | { | |
1915 | return (sop->so_owner.len == owner->len) && | |
1916 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1917 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1918 | } |
1919 | ||
1920 | static struct nfs4_stateowner * | |
1921 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1922 | { | |
1923 | struct nfs4_stateowner *so = NULL; | |
1924 | ||
1925 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1926 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1927 | return so; |
1928 | } | |
1929 | return NULL; | |
1930 | } | |
1931 | ||
1932 | /* search file_hashtbl[] for file */ | |
1933 | static struct nfs4_file * | |
1934 | find_file(struct inode *ino) | |
1935 | { | |
1936 | unsigned int hashval = file_hashval(ino); | |
1937 | struct nfs4_file *fp; | |
1938 | ||
8b671b80 | 1939 | spin_lock(&recall_lock); |
1da177e4 | 1940 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1941 | if (fp->fi_inode == ino) { |
1942 | get_nfs4_file(fp); | |
8b671b80 | 1943 | spin_unlock(&recall_lock); |
1da177e4 | 1944 | return fp; |
13cd2184 | 1945 | } |
1da177e4 | 1946 | } |
8b671b80 | 1947 | spin_unlock(&recall_lock); |
1da177e4 LT |
1948 | return NULL; |
1949 | } | |
1950 | ||
d87a8ade | 1951 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1952 | { |
d87a8ade | 1953 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1954 | return 0; |
d87a8ade AA |
1955 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1956 | return 0; | |
1957 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1958 | if (minorversion && x) { | |
1959 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1960 | return 0; | |
1961 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1962 | return 0; | |
1963 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1964 | } | |
1965 | if (x) | |
8838dc43 BF |
1966 | return 0; |
1967 | return 1; | |
ba5a6a19 BF |
1968 | } |
1969 | ||
8838dc43 | 1970 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1971 | { |
8838dc43 BF |
1972 | /* Note: unlike access bits, deny bits may be zero. */ |
1973 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1974 | } |
1da177e4 | 1975 | |
4f83aa30 BF |
1976 | /* |
1977 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1978 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1979 | * only what share bits are currently in force, but also what | |
1980 | * combinations of share bits previous opens have used. This allows us | |
1981 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1982 | * return an error if the client attempt to downgrade to a combination | |
1983 | * of share bits not explicable by closing some of its previous opens. | |
1984 | * | |
1985 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1986 | * track of access/deny bit combinations; so, e.g., we allow: | |
1987 | * | |
1988 | * OPEN allow read, deny write | |
1989 | * OPEN allow both, deny none | |
1990 | * DOWNGRADE allow read, deny none | |
1991 | * | |
1992 | * which we should reject. | |
1993 | */ | |
fd39ca9a | 1994 | static void |
1da177e4 LT |
1995 | set_access(unsigned int *access, unsigned long bmap) { |
1996 | int i; | |
1997 | ||
1998 | *access = 0; | |
1999 | for (i = 1; i < 4; i++) { | |
2000 | if (test_bit(i, &bmap)) | |
2001 | *access |= i; | |
2002 | } | |
2003 | } | |
2004 | ||
fd39ca9a | 2005 | static void |
1da177e4 LT |
2006 | set_deny(unsigned int *deny, unsigned long bmap) { |
2007 | int i; | |
2008 | ||
2009 | *deny = 0; | |
2010 | for (i = 0; i < 4; i++) { | |
2011 | if (test_bit(i, &bmap)) | |
2012 | *deny |= i ; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | static int | |
2017 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
2018 | unsigned int access, deny; | |
2019 | ||
2020 | set_access(&access, stp->st_access_bmap); | |
2021 | set_deny(&deny, stp->st_deny_bmap); | |
2022 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
2023 | return 0; | |
2024 | return 1; | |
2025 | } | |
2026 | ||
2027 | /* | |
2028 | * Called to check deny when READ with all zero stateid or | |
2029 | * WRITE with all zero or all one stateid | |
2030 | */ | |
b37ad28b | 2031 | static __be32 |
1da177e4 LT |
2032 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2033 | { | |
2034 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2035 | struct nfs4_file *fp; | |
2036 | struct nfs4_stateid *stp; | |
b37ad28b | 2037 | __be32 ret; |
1da177e4 LT |
2038 | |
2039 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2040 | ||
2041 | fp = find_file(ino); | |
13cd2184 N |
2042 | if (!fp) |
2043 | return nfs_ok; | |
b700949b | 2044 | ret = nfserr_locked; |
1da177e4 | 2045 | /* Search for conflicting share reservations */ |
13cd2184 N |
2046 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2047 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2048 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2049 | goto out; | |
1da177e4 | 2050 | } |
13cd2184 N |
2051 | ret = nfs_ok; |
2052 | out: | |
2053 | put_nfs4_file(fp); | |
2054 | return ret; | |
1da177e4 LT |
2055 | } |
2056 | ||
2057 | static inline void | |
2058 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2059 | { | |
2060 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2061 | drop_file_write_access(filp); |
42e49608 | 2062 | spin_lock(&filp->f_lock); |
1da177e4 | 2063 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
42e49608 | 2064 | spin_unlock(&filp->f_lock); |
1da177e4 LT |
2065 | } |
2066 | } | |
2067 | ||
1da177e4 LT |
2068 | /* |
2069 | * Spawn a thread to perform a recall on the delegation represented | |
2070 | * by the lease (file_lock) | |
2071 | * | |
2072 | * Called from break_lease() with lock_kernel() held. | |
2073 | * Note: we assume break_lease will only call this *once* for any given | |
2074 | * lease. | |
2075 | */ | |
2076 | static | |
2077 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2078 | { | |
63e4863f | 2079 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2080 | |
2081 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2082 | if (!dp) | |
2083 | return; | |
2084 | ||
2085 | /* We're assuming the state code never drops its reference | |
2086 | * without first removing the lease. Since we're in this lease | |
2087 | * callback (and since the lease code is serialized by the kernel | |
2088 | * lock) we know the server hasn't removed the lease yet, we know | |
2089 | * it's safe to take a reference: */ | |
2090 | atomic_inc(&dp->dl_count); | |
2091 | ||
2092 | spin_lock(&recall_lock); | |
2093 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2094 | spin_unlock(&recall_lock); | |
2095 | ||
2096 | /* only place dl_time is set. protected by lock_kernel*/ | |
2097 | dp->dl_time = get_seconds(); | |
2098 | ||
0272e1fd BF |
2099 | /* |
2100 | * We don't want the locks code to timeout the lease for us; | |
2101 | * we'll remove it ourself if the delegation isn't returned | |
2102 | * in time. | |
2103 | */ | |
2104 | fl->fl_break_time = 0; | |
1da177e4 | 2105 | |
63e4863f BF |
2106 | dp->dl_file->fi_had_conflict = true; |
2107 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2108 | } |
2109 | ||
2110 | /* | |
2111 | * The file_lock is being reapd. | |
2112 | * | |
2113 | * Called by locks_free_lock() with lock_kernel() held. | |
2114 | */ | |
2115 | static | |
2116 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2117 | { | |
2118 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2119 | ||
2120 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2121 | ||
2122 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2123 | return; | |
2124 | dp->dl_flock = NULL; | |
2125 | } | |
2126 | ||
2127 | /* | |
2128 | * Set the delegation file_lock back pointer. | |
2129 | * | |
a9933cea | 2130 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2131 | */ |
2132 | static | |
2133 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2134 | { | |
2135 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2136 | ||
2137 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2138 | if (!dp) | |
2139 | return; | |
2140 | dp->dl_flock = new; | |
2141 | } | |
2142 | ||
2143 | /* | |
a9933cea | 2144 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2145 | */ |
2146 | static | |
2147 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2148 | { | |
2149 | struct nfs4_delegation *onlistd = | |
2150 | (struct nfs4_delegation *)onlist->fl_owner; | |
2151 | struct nfs4_delegation *tryd = | |
2152 | (struct nfs4_delegation *)try->fl_owner; | |
2153 | ||
2154 | if (onlist->fl_lmops != try->fl_lmops) | |
2155 | return 0; | |
2156 | ||
2157 | return onlistd->dl_client == tryd->dl_client; | |
2158 | } | |
2159 | ||
2160 | ||
2161 | static | |
2162 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2163 | { | |
2164 | if (arg & F_UNLCK) | |
2165 | return lease_modify(onlist, arg); | |
2166 | else | |
2167 | return -EAGAIN; | |
2168 | } | |
2169 | ||
7b021967 | 2170 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2171 | .fl_break = nfsd_break_deleg_cb, |
2172 | .fl_release_private = nfsd_release_deleg_cb, | |
2173 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2174 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2175 | .fl_change = nfsd_change_deleg_cb, | |
2176 | }; | |
2177 | ||
2178 | ||
b37ad28b | 2179 | __be32 |
6668958f AA |
2180 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2181 | struct nfsd4_open *open) | |
1da177e4 | 2182 | { |
1da177e4 LT |
2183 | clientid_t *clientid = &open->op_clientid; |
2184 | struct nfs4_client *clp = NULL; | |
2185 | unsigned int strhashval; | |
2186 | struct nfs4_stateowner *sop = NULL; | |
2187 | ||
1da177e4 | 2188 | if (!check_name(open->op_owner)) |
0f442aa2 | 2189 | return nfserr_inval; |
1da177e4 LT |
2190 | |
2191 | if (STALE_CLIENTID(&open->op_clientid)) | |
2192 | return nfserr_stale_clientid; | |
2193 | ||
2194 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2195 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2196 | open->op_stateowner = sop; |
2197 | if (!sop) { | |
2198 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2199 | clp = find_confirmed_client(clientid); |
2200 | if (clp == NULL) | |
0f442aa2 BF |
2201 | return nfserr_expired; |
2202 | goto renew; | |
1da177e4 | 2203 | } |
6668958f AA |
2204 | /* When sessions are used, skip open sequenceid processing */ |
2205 | if (nfsd4_has_session(cstate)) | |
2206 | goto renew; | |
0f442aa2 BF |
2207 | if (!sop->so_confirmed) { |
2208 | /* Replace unconfirmed owners without checking for replay. */ | |
2209 | clp = sop->so_client; | |
f044ff83 | 2210 | release_openowner(sop); |
0f442aa2 BF |
2211 | open->op_stateowner = NULL; |
2212 | goto renew; | |
2213 | } | |
2214 | if (open->op_seqid == sop->so_seqid - 1) { | |
2215 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2216 | return nfserr_replay_me; |
0f442aa2 BF |
2217 | /* The original OPEN failed so spectacularly |
2218 | * that we don't even have replay data saved! | |
2219 | * Therefore, we have no choice but to continue | |
2220 | * processing this OPEN; presumably, we'll | |
2221 | * fail again for the same reason. | |
2222 | */ | |
2223 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2224 | goto renew; | |
2225 | } | |
2226 | if (open->op_seqid != sop->so_seqid) | |
2227 | return nfserr_bad_seqid; | |
1da177e4 | 2228 | renew: |
0f442aa2 BF |
2229 | if (open->op_stateowner == NULL) { |
2230 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2231 | if (sop == NULL) | |
2232 | return nfserr_resource; | |
2233 | open->op_stateowner = sop; | |
2234 | } | |
2235 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2236 | renew_client(sop->so_client); |
0f442aa2 | 2237 | return nfs_ok; |
1da177e4 LT |
2238 | } |
2239 | ||
b37ad28b | 2240 | static inline __be32 |
4a6e43e6 N |
2241 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2242 | { | |
2243 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2244 | return nfserr_openmode; | |
2245 | else | |
2246 | return nfs_ok; | |
2247 | } | |
2248 | ||
52f4fb43 N |
2249 | static struct nfs4_delegation * |
2250 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2251 | { | |
2252 | struct nfs4_delegation *dp; | |
2253 | ||
ea1da636 | 2254 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2255 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2256 | return dp; | |
2257 | } | |
2258 | return NULL; | |
2259 | } | |
2260 | ||
24a0111e BF |
2261 | int share_access_to_flags(u32 share_access) |
2262 | { | |
2263 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2264 | ||
2265 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2266 | } | |
2267 | ||
b37ad28b | 2268 | static __be32 |
567d9829 N |
2269 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2270 | struct nfs4_delegation **dp) | |
2271 | { | |
2272 | int flags; | |
b37ad28b | 2273 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2274 | |
2275 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2276 | if (*dp == NULL) | |
c44c5eeb | 2277 | goto out; |
24a0111e | 2278 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2279 | status = nfs4_check_delegmode(*dp, flags); |
2280 | if (status) | |
2281 | *dp = NULL; | |
c44c5eeb N |
2282 | out: |
2283 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2284 | return nfs_ok; | |
2285 | if (status) | |
2286 | return status; | |
2287 | open->op_stateowner->so_confirmed = 1; | |
2288 | return nfs_ok; | |
567d9829 N |
2289 | } |
2290 | ||
b37ad28b | 2291 | static __be32 |
1da177e4 LT |
2292 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2293 | { | |
2294 | struct nfs4_stateid *local; | |
b37ad28b | 2295 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2296 | struct nfs4_stateowner *sop = open->op_stateowner; |
2297 | ||
8beefa24 | 2298 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2299 | /* ignore lock owners */ |
2300 | if (local->st_stateowner->so_is_open_owner == 0) | |
2301 | continue; | |
2302 | /* remember if we have seen this open owner */ | |
2303 | if (local->st_stateowner == sop) | |
2304 | *stpp = local; | |
2305 | /* check for conflicting share reservations */ | |
2306 | if (!test_share(local, open)) | |
2307 | goto out; | |
2308 | } | |
2309 | status = 0; | |
2310 | out: | |
2311 | return status; | |
2312 | } | |
2313 | ||
5ac049ac N |
2314 | static inline struct nfs4_stateid * |
2315 | nfs4_alloc_stateid(void) | |
2316 | { | |
2317 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2318 | } | |
2319 | ||
21fb4016 BF |
2320 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2321 | { | |
2322 | int flags = 0; | |
2323 | ||
2324 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2325 | flags |= NFSD_MAY_READ; | |
2326 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2327 | flags |= NFSD_MAY_WRITE; | |
2328 | return flags; | |
2329 | } | |
2330 | ||
b37ad28b | 2331 | static __be32 |
1da177e4 | 2332 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2333 | struct nfs4_delegation *dp, |
21fb4016 | 2334 | struct svc_fh *cur_fh, struct nfsd4_open *open) |
1da177e4 LT |
2335 | { |
2336 | struct nfs4_stateid *stp; | |
1da177e4 | 2337 | |
5ac049ac | 2338 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2339 | if (stp == NULL) |
2340 | return nfserr_resource; | |
2341 | ||
567d9829 N |
2342 | if (dp) { |
2343 | get_file(dp->dl_vfs_file); | |
2344 | stp->st_vfs_file = dp->dl_vfs_file; | |
2345 | } else { | |
b37ad28b | 2346 | __be32 status; |
21fb4016 BF |
2347 | int access = nfs4_access_to_access(open->op_share_access); |
2348 | ||
2349 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2350 | &stp->st_vfs_file); | |
567d9829 N |
2351 | if (status) { |
2352 | if (status == nfserr_dropit) | |
2353 | status = nfserr_jukebox; | |
5ac049ac | 2354 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2355 | return status; |
2356 | } | |
1da177e4 | 2357 | } |
1da177e4 LT |
2358 | *stpp = stp; |
2359 | return 0; | |
2360 | } | |
2361 | ||
b37ad28b | 2362 | static inline __be32 |
1da177e4 LT |
2363 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2364 | struct nfsd4_open *open) | |
2365 | { | |
2366 | struct iattr iattr = { | |
2367 | .ia_valid = ATTR_SIZE, | |
2368 | .ia_size = 0, | |
2369 | }; | |
2370 | if (!open->op_truncate) | |
2371 | return 0; | |
2372 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2373 | return nfserr_inval; |
1da177e4 LT |
2374 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2375 | } | |
2376 | ||
b37ad28b | 2377 | static __be32 |
1da177e4 LT |
2378 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2379 | { | |
2380 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2381 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2382 | unsigned int share_access, new_writer; |
24a0111e | 2383 | u32 op_share_access; |
b37ad28b | 2384 | __be32 status; |
1da177e4 LT |
2385 | |
2386 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2387 | new_writer = (~share_access) & open->op_share_access |
2388 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2389 | |
6c26d08f | 2390 | if (new_writer) { |
b37ad28b AV |
2391 | int err = get_write_access(inode); |
2392 | if (err) | |
2393 | return nfserrno(err); | |
e518f056 BH |
2394 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2395 | if (err) | |
2396 | return nfserrno(err); | |
2397 | file_take_write(filp); | |
6c26d08f | 2398 | } |
1da177e4 LT |
2399 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2400 | if (status) { | |
6c26d08f BF |
2401 | if (new_writer) |
2402 | put_write_access(inode); | |
1da177e4 LT |
2403 | return status; |
2404 | } | |
2405 | /* remember the open */ | |
24a0111e BF |
2406 | op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2407 | filp->f_mode |= op_share_access; | |
2408 | __set_bit(op_share_access, &stp->st_access_bmap); | |
b55e0ba1 | 2409 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2410 | |
2411 | return nfs_ok; | |
2412 | } | |
2413 | ||
2414 | ||
1da177e4 | 2415 | static void |
37515177 | 2416 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2417 | { |
37515177 N |
2418 | open->op_stateowner->so_confirmed = 1; |
2419 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2420 | } |
2421 | ||
2422 | /* | |
2423 | * Attempt to hand out a delegation. | |
2424 | */ | |
2425 | static void | |
2426 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2427 | { | |
2428 | struct nfs4_delegation *dp; | |
2429 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2430 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2431 | struct file_lock fl, *flp = &fl; |
2432 | int status, flag = 0; | |
2433 | ||
2434 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2435 | open->op_recall = 0; |
2436 | switch (open->op_claim_type) { | |
2437 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2438 | if (!cb_up) |
7b190fec N |
2439 | open->op_recall = 1; |
2440 | flag = open->op_delegate_type; | |
2441 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2442 | goto out; | |
2443 | break; | |
2444 | case NFS4_OPEN_CLAIM_NULL: | |
2445 | /* Let's not give out any delegations till everyone's | |
2446 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2447 | if (locks_in_grace()) |
7b190fec | 2448 | goto out; |
2bf23875 | 2449 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2450 | goto out; |
2451 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2452 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2453 | else | |
2454 | flag = NFS4_OPEN_DELEGATE_READ; | |
2455 | break; | |
2456 | default: | |
2457 | goto out; | |
2458 | } | |
1da177e4 LT |
2459 | |
2460 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2461 | if (dp == NULL) { | |
2462 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2463 | goto out; | |
2464 | } | |
2465 | locks_init_lock(&fl); | |
2466 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2467 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2468 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2469 | fl.fl_end = OFFSET_MAX; |
2470 | fl.fl_owner = (fl_owner_t)dp; | |
2471 | fl.fl_file = stp->st_vfs_file; | |
2472 | fl.fl_pid = current->tgid; | |
2473 | ||
a9933cea | 2474 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2475 | * the lock_manager callbacks fl_mylease and fl_change are used |
2476 | */ | |
9167f501 | 2477 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2478 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2479 | unhash_delegation(dp); |
1da177e4 LT |
2480 | flag = NFS4_OPEN_DELEGATE_NONE; |
2481 | goto out; | |
2482 | } | |
2483 | ||
2484 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2485 | ||
8c10cbdb BH |
2486 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2487 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2488 | out: |
7b190fec N |
2489 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2490 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2491 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2492 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2493 | open->op_delegate_type = flag; |
2494 | } | |
2495 | ||
2496 | /* | |
2497 | * called with nfs4_lock_state() held. | |
2498 | */ | |
b37ad28b | 2499 | __be32 |
1da177e4 LT |
2500 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2501 | { | |
6668958f | 2502 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2503 | struct nfs4_file *fp = NULL; |
2504 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2505 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2506 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2507 | __be32 status; |
1da177e4 LT |
2508 | |
2509 | status = nfserr_inval; | |
d87a8ade | 2510 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2511 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2512 | goto out; |
2513 | /* | |
2514 | * Lookup file; if found, lookup stateid and check open request, | |
2515 | * and check for delegations in the process of being recalled. | |
2516 | * If not found, create the nfs4_file struct | |
2517 | */ | |
2518 | fp = find_file(ino); | |
2519 | if (fp) { | |
2520 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2521 | goto out; | |
c44c5eeb N |
2522 | status = nfs4_check_deleg(fp, open, &dp); |
2523 | if (status) | |
2524 | goto out; | |
1da177e4 | 2525 | } else { |
c44c5eeb N |
2526 | status = nfserr_bad_stateid; |
2527 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2528 | goto out; | |
1da177e4 LT |
2529 | status = nfserr_resource; |
2530 | fp = alloc_init_file(ino); | |
2531 | if (fp == NULL) | |
2532 | goto out; | |
2533 | } | |
2534 | ||
2535 | /* | |
2536 | * OPEN the file, or upgrade an existing OPEN. | |
2537 | * If truncate fails, the OPEN fails. | |
2538 | */ | |
2539 | if (stp) { | |
2540 | /* Stateid was found, this is an OPEN upgrade */ | |
2541 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2542 | if (status) | |
2543 | goto out; | |
444c2c07 | 2544 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2545 | } else { |
2546 | /* Stateid was not found, this is a new OPEN */ | |
21fb4016 | 2547 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, open); |
567d9829 | 2548 | if (status) |
1da177e4 LT |
2549 | goto out; |
2550 | init_stateid(stp, fp, open); | |
2551 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2552 | if (status) { | |
2283963f | 2553 | release_open_stateid(stp); |
1da177e4 LT |
2554 | goto out; |
2555 | } | |
6668958f AA |
2556 | if (nfsd4_has_session(&resp->cstate)) |
2557 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2558 | } |
2559 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2560 | ||
4dc6ec00 | 2561 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2562 | open->op_stateowner->so_confirmed = 1; |
2563 | ||
1da177e4 LT |
2564 | /* |
2565 | * Attempt to hand out a delegation. No error return, because the | |
2566 | * OPEN succeeds even if we fail. | |
2567 | */ | |
2568 | nfs4_open_delegation(current_fh, open, stp); | |
2569 | ||
2570 | status = nfs_ok; | |
2571 | ||
8c10cbdb BH |
2572 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2573 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2574 | out: |
13cd2184 N |
2575 | if (fp) |
2576 | put_nfs4_file(fp); | |
37515177 N |
2577 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2578 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2579 | /* |
2580 | * To finish the open response, we just need to set the rflags. | |
2581 | */ | |
2582 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2583 | if (!open->op_stateowner->so_confirmed && |
2584 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2585 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2586 | ||
2587 | return status; | |
2588 | } | |
2589 | ||
b37ad28b | 2590 | __be32 |
b591480b BF |
2591 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2592 | clientid_t *clid) | |
1da177e4 LT |
2593 | { |
2594 | struct nfs4_client *clp; | |
b37ad28b | 2595 | __be32 status; |
1da177e4 LT |
2596 | |
2597 | nfs4_lock_state(); | |
2598 | dprintk("process_renew(%08x/%08x): starting\n", | |
2599 | clid->cl_boot, clid->cl_id); | |
2600 | status = nfserr_stale_clientid; | |
2601 | if (STALE_CLIENTID(clid)) | |
2602 | goto out; | |
2603 | clp = find_confirmed_client(clid); | |
2604 | status = nfserr_expired; | |
2605 | if (clp == NULL) { | |
2606 | /* We assume the client took too long to RENEW. */ | |
2607 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2608 | goto out; | |
2609 | } | |
2610 | renew_client(clp); | |
2611 | status = nfserr_cb_path_down; | |
ea1da636 | 2612 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2613 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2614 | goto out; |
2615 | status = nfs_ok; | |
2616 | out: | |
2617 | nfs4_unlock_state(); | |
2618 | return status; | |
2619 | } | |
2620 | ||
af558e33 BF |
2621 | struct lock_manager nfsd4_manager = { |
2622 | }; | |
2623 | ||
a76b4319 | 2624 | static void |
af558e33 | 2625 | nfsd4_end_grace(void) |
a76b4319 N |
2626 | { |
2627 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2628 | nfsd4_recdir_purge_old(); |
af558e33 | 2629 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2630 | /* |
2631 | * Now that every NFSv4 client has had the chance to recover and | |
2632 | * to see the (possibly new, possibly shorter) lease time, we | |
2633 | * can safely set the next grace time to the current lease time: | |
2634 | */ | |
2635 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2636 | } |
2637 | ||
fd39ca9a | 2638 | static time_t |
1da177e4 LT |
2639 | nfs4_laundromat(void) |
2640 | { | |
2641 | struct nfs4_client *clp; | |
2642 | struct nfs4_stateowner *sop; | |
2643 | struct nfs4_delegation *dp; | |
2644 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2645 | time_t cutoff = get_seconds() - nfsd4_lease; |
2646 | time_t t, clientid_val = nfsd4_lease; | |
2647 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2648 | |
2649 | nfs4_lock_state(); | |
2650 | ||
2651 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2652 | if (locks_in_grace()) |
2653 | nfsd4_end_grace(); | |
36acb66b BH |
2654 | INIT_LIST_HEAD(&reaplist); |
2655 | spin_lock(&client_lock); | |
1da177e4 LT |
2656 | list_for_each_safe(pos, next, &client_lru) { |
2657 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2658 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2659 | t = clp->cl_time - cutoff; | |
2660 | if (clientid_val > t) | |
2661 | clientid_val = t; | |
2662 | break; | |
2663 | } | |
d7682988 BH |
2664 | if (atomic_read(&clp->cl_refcount)) { |
2665 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2666 | clp->cl_clientid.cl_id); | |
2667 | continue; | |
2668 | } | |
2669 | unhash_client_locked(clp); | |
2670 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2671 | } |
2672 | spin_unlock(&client_lock); | |
2673 | list_for_each_safe(pos, next, &reaplist) { | |
2674 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2675 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2676 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2677 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2678 | expire_client(clp); |
2679 | } | |
1da177e4 LT |
2680 | spin_lock(&recall_lock); |
2681 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2682 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2683 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2684 | u = dp->dl_time - cutoff; | |
2685 | if (test_val > u) | |
2686 | test_val = u; | |
2687 | break; | |
2688 | } | |
2689 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2690 | dp, dp->dl_flock); | |
2691 | list_move(&dp->dl_recall_lru, &reaplist); | |
2692 | } | |
2693 | spin_unlock(&recall_lock); | |
2694 | list_for_each_safe(pos, next, &reaplist) { | |
2695 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2696 | list_del_init(&dp->dl_recall_lru); | |
2697 | unhash_delegation(dp); | |
2698 | } | |
cf07d2ea | 2699 | test_val = nfsd4_lease; |
1da177e4 LT |
2700 | list_for_each_safe(pos, next, &close_lru) { |
2701 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2702 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2703 | u = sop->so_time - cutoff; | |
2704 | if (test_val > u) | |
2705 | test_val = u; | |
2706 | break; | |
2707 | } | |
2708 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2709 | sop->so_id); | |
f044ff83 | 2710 | release_openowner(sop); |
1da177e4 LT |
2711 | } |
2712 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2713 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2714 | nfs4_unlock_state(); | |
2715 | return clientid_val; | |
2716 | } | |
2717 | ||
a254b246 HH |
2718 | static struct workqueue_struct *laundry_wq; |
2719 | static void laundromat_main(struct work_struct *); | |
2720 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2721 | ||
2722 | static void | |
c4028958 | 2723 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2724 | { |
2725 | time_t t; | |
2726 | ||
2727 | t = nfs4_laundromat(); | |
2728 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2729 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2730 | } |
2731 | ||
fd39ca9a | 2732 | static struct nfs4_stateowner * |
f8816512 N |
2733 | search_close_lru(u32 st_id, int flags) |
2734 | { | |
1da177e4 LT |
2735 | struct nfs4_stateowner *local = NULL; |
2736 | ||
1da177e4 LT |
2737 | if (flags & CLOSE_STATE) { |
2738 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2739 | if (local->so_id == st_id) | |
2740 | return local; | |
2741 | } | |
2742 | } | |
2743 | return NULL; | |
2744 | } | |
2745 | ||
2746 | static inline int | |
2747 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2748 | { | |
7eaa36e2 | 2749 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2750 | } |
2751 | ||
2752 | static int | |
2753 | STALE_STATEID(stateid_t *stateid) | |
2754 | { | |
e4e83ea4 BF |
2755 | if (stateid->si_boot == boot_time) |
2756 | return 0; | |
2757 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 2758 | STATEID_VAL(stateid)); |
e4e83ea4 | 2759 | return 1; |
1da177e4 LT |
2760 | } |
2761 | ||
2762 | static inline int | |
2763 | access_permit_read(unsigned long access_bmap) | |
2764 | { | |
2765 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2766 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2767 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2768 | } | |
2769 | ||
2770 | static inline int | |
2771 | access_permit_write(unsigned long access_bmap) | |
2772 | { | |
2773 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2774 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2775 | } | |
2776 | ||
2777 | static | |
b37ad28b | 2778 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2779 | { |
b37ad28b | 2780 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2781 | |
2782 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2783 | goto out; | |
2784 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2785 | goto out; | |
2786 | status = nfs_ok; | |
2787 | out: | |
2788 | return status; | |
2789 | } | |
2790 | ||
b37ad28b | 2791 | static inline __be32 |
1da177e4 LT |
2792 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2793 | { | |
203a8c8e | 2794 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2795 | return nfs_ok; |
af558e33 | 2796 | else if (locks_in_grace()) { |
1da177e4 LT |
2797 | /* Answer in remaining cases depends on existance of |
2798 | * conflicting state; so we must wait out the grace period. */ | |
2799 | return nfserr_grace; | |
2800 | } else if (flags & WR_STATE) | |
2801 | return nfs4_share_conflict(current_fh, | |
2802 | NFS4_SHARE_DENY_WRITE); | |
2803 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2804 | return nfs4_share_conflict(current_fh, | |
2805 | NFS4_SHARE_DENY_READ); | |
2806 | } | |
2807 | ||
2808 | /* | |
2809 | * Allow READ/WRITE during grace period on recovered state only for files | |
2810 | * that are not able to provide mandatory locking. | |
2811 | */ | |
2812 | static inline int | |
18f82731 | 2813 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2814 | { |
203a8c8e | 2815 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2816 | } |
2817 | ||
6668958f | 2818 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2819 | { |
6668958f AA |
2820 | /* |
2821 | * When sessions are used the stateid generation number is ignored | |
2822 | * when it is zero. | |
2823 | */ | |
2824 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2825 | goto out; | |
2826 | ||
0836f587 BF |
2827 | /* If the client sends us a stateid from the future, it's buggy: */ |
2828 | if (in->si_generation > ref->si_generation) | |
2829 | return nfserr_bad_stateid; | |
2830 | /* | |
2831 | * The following, however, can happen. For example, if the | |
2832 | * client sends an open and some IO at the same time, the open | |
2833 | * may bump si_generation while the IO is still in flight. | |
2834 | * Thanks to hard links and renames, the client never knows what | |
2835 | * file an open will affect. So it could avoid that situation | |
2836 | * only by serializing all opens and IO from the same open | |
2837 | * owner. To recover from the old_stateid error, the client | |
2838 | * will just have to retry the IO: | |
2839 | */ | |
2840 | if (in->si_generation < ref->si_generation) | |
2841 | return nfserr_old_stateid; | |
6668958f | 2842 | out: |
0836f587 BF |
2843 | return nfs_ok; |
2844 | } | |
2845 | ||
3e633079 BF |
2846 | static int is_delegation_stateid(stateid_t *stateid) |
2847 | { | |
2848 | return stateid->si_fileid == 0; | |
2849 | } | |
2850 | ||
1da177e4 LT |
2851 | /* |
2852 | * Checks for stateid operations | |
2853 | */ | |
b37ad28b | 2854 | __be32 |
dd453dfd BH |
2855 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2856 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2857 | { |
2858 | struct nfs4_stateid *stp = NULL; | |
2859 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2860 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2861 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2862 | __be32 status; |
1da177e4 | 2863 | |
1da177e4 LT |
2864 | if (filpp) |
2865 | *filpp = NULL; | |
2866 | ||
18f82731 | 2867 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2868 | return nfserr_grace; |
2869 | ||
6668958f AA |
2870 | if (nfsd4_has_session(cstate)) |
2871 | flags |= HAS_SESSION; | |
2872 | ||
1da177e4 LT |
2873 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2874 | return check_special_stateids(current_fh, stateid, flags); | |
2875 | ||
1da177e4 LT |
2876 | status = nfserr_stale_stateid; |
2877 | if (STALE_STATEID(stateid)) | |
2878 | goto out; | |
2879 | ||
1da177e4 | 2880 | status = nfserr_bad_stateid; |
3e633079 | 2881 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2882 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 2883 | if (!dp) |
1da177e4 | 2884 | goto out; |
6668958f AA |
2885 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2886 | flags); | |
0c2a498f BF |
2887 | if (status) |
2888 | goto out; | |
dc9bf700 BF |
2889 | status = nfs4_check_delegmode(dp, flags); |
2890 | if (status) | |
2891 | goto out; | |
2892 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2893 | if (filpp) |
2894 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2895 | } else { /* open or lock stateid */ |
a4455be0 | 2896 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 2897 | if (!stp) |
1da177e4 | 2898 | goto out; |
6150ef0d | 2899 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2900 | goto out; |
2901 | if (!stp->st_stateowner->so_confirmed) | |
2902 | goto out; | |
6668958f AA |
2903 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2904 | flags); | |
0c2a498f BF |
2905 | if (status) |
2906 | goto out; | |
a4455be0 BF |
2907 | status = nfs4_check_openmode(stp, flags); |
2908 | if (status) | |
1da177e4 LT |
2909 | goto out; |
2910 | renew_client(stp->st_stateowner->so_client); | |
2911 | if (filpp) | |
2912 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2913 | } |
2914 | status = nfs_ok; | |
2915 | out: | |
2916 | return status; | |
2917 | } | |
2918 | ||
4c4cd222 N |
2919 | static inline int |
2920 | setlkflg (int type) | |
2921 | { | |
2922 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2923 | RD_STATE : WR_STATE; | |
2924 | } | |
1da177e4 LT |
2925 | |
2926 | /* | |
2927 | * Checks for sequence id mutating operations. | |
2928 | */ | |
b37ad28b | 2929 | static __be32 |
dd453dfd BH |
2930 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2931 | stateid_t *stateid, int flags, | |
2932 | struct nfs4_stateowner **sopp, | |
2933 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2934 | { |
1da177e4 LT |
2935 | struct nfs4_stateid *stp; |
2936 | struct nfs4_stateowner *sop; | |
dd453dfd | 2937 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2938 | __be32 status; |
1da177e4 | 2939 | |
8c10cbdb BH |
2940 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2941 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2942 | |
1da177e4 LT |
2943 | *stpp = NULL; |
2944 | *sopp = NULL; | |
2945 | ||
1da177e4 | 2946 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2947 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2948 | return nfserr_bad_stateid; |
1da177e4 LT |
2949 | } |
2950 | ||
1da177e4 | 2951 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2952 | return nfserr_stale_stateid; |
6668958f AA |
2953 | |
2954 | if (nfsd4_has_session(cstate)) | |
2955 | flags |= HAS_SESSION; | |
2956 | ||
1da177e4 LT |
2957 | /* |
2958 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2959 | * the confirmed flag is incorrecly set, or the generation | |
2960 | * number is incorrect. | |
1da177e4 | 2961 | */ |
f8816512 N |
2962 | stp = find_stateid(stateid, flags); |
2963 | if (stp == NULL) { | |
2964 | /* | |
2965 | * Also, we should make sure this isn't just the result of | |
2966 | * a replayed close: | |
2967 | */ | |
2968 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2969 | if (sop == NULL) | |
e4e83ea4 | 2970 | return nfserr_bad_stateid; |
f8816512 N |
2971 | *sopp = sop; |
2972 | goto check_replay; | |
2973 | } | |
1da177e4 | 2974 | |
39325bd0 BF |
2975 | *stpp = stp; |
2976 | *sopp = sop = stp->st_stateowner; | |
2977 | ||
4c4cd222 | 2978 | if (lock) { |
4c4cd222 | 2979 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2980 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2981 | int lkflg = 0; |
b37ad28b | 2982 | __be32 status; |
4c4cd222 N |
2983 | |
2984 | lkflg = setlkflg(lock->lk_type); | |
2985 | ||
2986 | if (lock->lk_is_new) { | |
599e0a22 BF |
2987 | if (!sop->so_is_open_owner) |
2988 | return nfserr_bad_stateid; | |
60adfc50 AA |
2989 | if (!(flags & HAS_SESSION) && |
2990 | !same_clid(&clp->cl_clientid, lockclid)) | |
2991 | return nfserr_bad_stateid; | |
599e0a22 BF |
2992 | /* stp is the open stateid */ |
2993 | status = nfs4_check_openmode(stp, lkflg); | |
2994 | if (status) | |
2995 | return status; | |
2996 | } else { | |
2997 | /* stp is the lock stateid */ | |
2998 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2999 | if (status) | |
3000 | return status; | |
4c4cd222 | 3001 | } |
1da177e4 LT |
3002 | } |
3003 | ||
f3362737 | 3004 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3005 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3006 | return nfserr_bad_stateid; |
1da177e4 LT |
3007 | } |
3008 | ||
1da177e4 LT |
3009 | /* |
3010 | * We now validate the seqid and stateid generation numbers. | |
3011 | * For the moment, we ignore the possibility of | |
3012 | * generation number wraparound. | |
3013 | */ | |
6668958f | 3014 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3015 | goto check_replay; |
3016 | ||
3a4f98bb | 3017 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3018 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3019 | " unconfirmed stateowner!\n"); |
3020 | return nfserr_bad_stateid; | |
1da177e4 | 3021 | } |
3a4f98bb | 3022 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3023 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3024 | " confirmed yet!\n"); |
3025 | return nfserr_bad_stateid; | |
1da177e4 | 3026 | } |
6668958f | 3027 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3028 | if (status) |
3029 | return status; | |
52fd004e | 3030 | renew_client(sop->so_client); |
3a4f98bb | 3031 | return nfs_ok; |
1da177e4 | 3032 | |
1da177e4 | 3033 | check_replay: |
bd9aac52 | 3034 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3035 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3036 | /* indicate replay to calling function */ |
a90b061c | 3037 | return nfserr_replay_me; |
1da177e4 | 3038 | } |
2fdada03 | 3039 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3040 | sop->so_seqid, seqid); |
3041 | *sopp = NULL; | |
3042 | return nfserr_bad_seqid; | |
1da177e4 LT |
3043 | } |
3044 | ||
b37ad28b | 3045 | __be32 |
ca364317 | 3046 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3047 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3048 | { |
b37ad28b | 3049 | __be32 status; |
1da177e4 LT |
3050 | struct nfs4_stateowner *sop; |
3051 | struct nfs4_stateid *stp; | |
3052 | ||
3053 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3054 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3055 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3056 | |
ca364317 | 3057 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3058 | if (status) |
3059 | return status; | |
1da177e4 LT |
3060 | |
3061 | nfs4_lock_state(); | |
3062 | ||
dd453dfd | 3063 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3064 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3065 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3066 | &oc->oc_stateowner, &stp, NULL))) |
3067 | goto out; | |
3068 | ||
3069 | sop = oc->oc_stateowner; | |
3070 | sop->so_confirmed = 1; | |
3071 | update_stateid(&stp->st_stateid); | |
3072 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3073 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3074 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3075 | |
3076 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3077 | out: |
f2327d9a | 3078 | if (oc->oc_stateowner) { |
1da177e4 | 3079 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3080 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3081 | } |
1da177e4 LT |
3082 | nfs4_unlock_state(); |
3083 | return status; | |
3084 | } | |
3085 | ||
3086 | ||
3087 | /* | |
3088 | * unset all bits in union bitmap (bmap) that | |
3089 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3090 | */ | |
3091 | static void | |
3092 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3093 | { | |
3094 | int i; | |
3095 | for (i = 1; i < 4; i++) { | |
3096 | if ((i & access) != i) | |
3097 | __clear_bit(i, bmap); | |
3098 | } | |
3099 | } | |
3100 | ||
3101 | static void | |
3102 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3103 | { | |
3104 | int i; | |
3105 | for (i = 0; i < 4; i++) { | |
3106 | if ((i & deny) != i) | |
3107 | __clear_bit(i, bmap); | |
3108 | } | |
3109 | } | |
3110 | ||
b37ad28b | 3111 | __be32 |
ca364317 BF |
3112 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3113 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3114 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3115 | { |
b37ad28b | 3116 | __be32 status; |
1da177e4 LT |
3117 | struct nfs4_stateid *stp; |
3118 | unsigned int share_access; | |
3119 | ||
3120 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3121 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3122 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3123 | |
d87a8ade | 3124 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3125 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3126 | return nfserr_inval; |
3127 | ||
3128 | nfs4_lock_state(); | |
dd453dfd | 3129 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3130 | od->od_seqid, |
1da177e4 | 3131 | &od->od_stateid, |
f3362737 | 3132 | OPEN_STATE, |
1da177e4 LT |
3133 | &od->od_stateowner, &stp, NULL))) |
3134 | goto out; | |
3135 | ||
3136 | status = nfserr_inval; | |
3137 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3138 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3139 | stp->st_access_bmap, od->od_share_access); | |
3140 | goto out; | |
3141 | } | |
3142 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3143 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3144 | stp->st_deny_bmap, od->od_share_deny); | |
3145 | goto out; | |
3146 | } | |
3147 | set_access(&share_access, stp->st_access_bmap); | |
3148 | nfs4_file_downgrade(stp->st_vfs_file, | |
3149 | share_access & ~od->od_share_access); | |
3150 | ||
3151 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3152 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3153 | ||
3154 | update_stateid(&stp->st_stateid); | |
3155 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3156 | status = nfs_ok; | |
3157 | out: | |
f2327d9a | 3158 | if (od->od_stateowner) { |
1da177e4 | 3159 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3160 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3161 | } |
1da177e4 LT |
3162 | nfs4_unlock_state(); |
3163 | return status; | |
3164 | } | |
3165 | ||
3166 | /* | |
3167 | * nfs4_unlock_state() called after encode | |
3168 | */ | |
b37ad28b | 3169 | __be32 |
ca364317 | 3170 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3171 | struct nfsd4_close *close) |
1da177e4 | 3172 | { |
b37ad28b | 3173 | __be32 status; |
1da177e4 LT |
3174 | struct nfs4_stateid *stp; |
3175 | ||
3176 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3177 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3178 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3179 | |
3180 | nfs4_lock_state(); | |
3181 | /* check close_lru for replay */ | |
dd453dfd | 3182 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3183 | close->cl_seqid, |
1da177e4 | 3184 | &close->cl_stateid, |
f3362737 | 3185 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3186 | &close->cl_stateowner, &stp, NULL))) |
3187 | goto out; | |
1da177e4 LT |
3188 | status = nfs_ok; |
3189 | update_stateid(&stp->st_stateid); | |
3190 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3191 | ||
04ef5954 | 3192 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3193 | release_open_stateid(stp); |
04ef5954 BF |
3194 | |
3195 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3196 | * released by the laundromat service after the lease period | |
3197 | * to enable us to handle CLOSE replay | |
3198 | */ | |
3199 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3200 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3201 | out: |
f2327d9a | 3202 | if (close->cl_stateowner) { |
1da177e4 | 3203 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3204 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3205 | } |
1da177e4 LT |
3206 | nfs4_unlock_state(); |
3207 | return status; | |
3208 | } | |
3209 | ||
b37ad28b | 3210 | __be32 |
ca364317 BF |
3211 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3212 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3213 | { |
203a8c8e BF |
3214 | struct nfs4_delegation *dp; |
3215 | stateid_t *stateid = &dr->dr_stateid; | |
3216 | struct inode *inode; | |
b37ad28b | 3217 | __be32 status; |
6668958f | 3218 | int flags = 0; |
1da177e4 | 3219 | |
ca364317 | 3220 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3221 | return status; |
3222 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3223 | |
6668958f AA |
3224 | if (nfsd4_has_session(cstate)) |
3225 | flags |= HAS_SESSION; | |
1da177e4 | 3226 | nfs4_lock_state(); |
203a8c8e BF |
3227 | status = nfserr_bad_stateid; |
3228 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3229 | goto out; | |
3230 | status = nfserr_stale_stateid; | |
3231 | if (STALE_STATEID(stateid)) | |
3232 | goto out; | |
7e0f7cf5 | 3233 | status = nfserr_bad_stateid; |
203a8c8e BF |
3234 | if (!is_delegation_stateid(stateid)) |
3235 | goto out; | |
203a8c8e | 3236 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3237 | if (!dp) |
203a8c8e | 3238 | goto out; |
6668958f | 3239 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3240 | if (status) |
3241 | goto out; | |
3242 | renew_client(dp->dl_client); | |
3243 | ||
3244 | unhash_delegation(dp); | |
1da177e4 | 3245 | out: |
203a8c8e BF |
3246 | nfs4_unlock_state(); |
3247 | ||
1da177e4 LT |
3248 | return status; |
3249 | } | |
3250 | ||
3251 | ||
3252 | /* | |
3253 | * Lock owner state (byte-range locks) | |
3254 | */ | |
3255 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3256 | #define LOCK_HASH_BITS 8 | |
3257 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3258 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3259 | ||
87df4de8 BH |
3260 | static inline u64 |
3261 | end_offset(u64 start, u64 len) | |
3262 | { | |
3263 | u64 end; | |
3264 | ||
3265 | end = start + len; | |
3266 | return end >= start ? end: NFS4_MAX_UINT64; | |
3267 | } | |
3268 | ||
3269 | /* last octet in a range */ | |
3270 | static inline u64 | |
3271 | last_byte_offset(u64 start, u64 len) | |
3272 | { | |
3273 | u64 end; | |
3274 | ||
3275 | BUG_ON(!len); | |
3276 | end = start + len; | |
3277 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3278 | } | |
3279 | ||
1da177e4 LT |
3280 | #define lockownerid_hashval(id) \ |
3281 | ((id) & LOCK_HASH_MASK) | |
3282 | ||
3283 | static inline unsigned int | |
3284 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3285 | struct xdr_netobj *ownername) | |
3286 | { | |
3287 | return (file_hashval(inode) + cl_id | |
3288 | + opaque_hashval(ownername->data, ownername->len)) | |
3289 | & LOCK_HASH_MASK; | |
3290 | } | |
3291 | ||
3292 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3293 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3294 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3295 | ||
fd39ca9a | 3296 | static struct nfs4_stateid * |
1da177e4 LT |
3297 | find_stateid(stateid_t *stid, int flags) |
3298 | { | |
9346eff0 | 3299 | struct nfs4_stateid *local; |
1da177e4 LT |
3300 | u32 st_id = stid->si_stateownerid; |
3301 | u32 f_id = stid->si_fileid; | |
3302 | unsigned int hashval; | |
3303 | ||
3304 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3305 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3306 | hashval = stateid_hashval(st_id, f_id); |
3307 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3308 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3309 | (local->st_stateid.si_fileid == f_id)) | |
3310 | return local; | |
3311 | } | |
3312 | } | |
9346eff0 KK |
3313 | |
3314 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3315 | hashval = stateid_hashval(st_id, f_id); |
3316 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3317 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3318 | (local->st_stateid.si_fileid == f_id)) | |
3319 | return local; | |
3320 | } | |
849823c5 | 3321 | } |
1da177e4 LT |
3322 | return NULL; |
3323 | } | |
3324 | ||
3325 | static struct nfs4_delegation * | |
3326 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3327 | { | |
13cd2184 N |
3328 | struct nfs4_file *fp; |
3329 | struct nfs4_delegation *dl; | |
1da177e4 | 3330 | |
8c10cbdb BH |
3331 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3332 | STATEID_VAL(stid)); | |
1da177e4 | 3333 | |
1da177e4 | 3334 | fp = find_file(ino); |
13cd2184 N |
3335 | if (!fp) |
3336 | return NULL; | |
3337 | dl = find_delegation_file(fp, stid); | |
3338 | put_nfs4_file(fp); | |
3339 | return dl; | |
1da177e4 LT |
3340 | } |
3341 | ||
3342 | /* | |
3343 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3344 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3345 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3346 | * locking, this prevents us from being completely protocol-compliant. The | |
3347 | * real solution to this problem is to start using unsigned file offsets in | |
3348 | * the VFS, but this is a very deep change! | |
3349 | */ | |
3350 | static inline void | |
3351 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3352 | { | |
3353 | if (lock->fl_start < 0) | |
3354 | lock->fl_start = OFFSET_MAX; | |
3355 | if (lock->fl_end < 0) | |
3356 | lock->fl_end = OFFSET_MAX; | |
3357 | } | |
3358 | ||
d5b9026a N |
3359 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3360 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3361 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3362 | }; |
1da177e4 LT |
3363 | |
3364 | static inline void | |
3365 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3366 | { | |
d5b9026a N |
3367 | struct nfs4_stateowner *sop; |
3368 | unsigned int hval; | |
1da177e4 | 3369 | |
d5b9026a N |
3370 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3371 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3372 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3373 | kref_get(&sop->so_ref); |
3374 | deny->ld_sop = sop; | |
3375 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3376 | } else { |
3377 | deny->ld_sop = NULL; | |
3378 | deny->ld_clientid.cl_boot = 0; | |
3379 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3380 | } |
3381 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3382 | deny->ld_length = NFS4_MAX_UINT64; |
3383 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3384 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3385 | deny->ld_type = NFS4_READ_LT; | |
3386 | if (fl->fl_type != F_RDLCK) | |
3387 | deny->ld_type = NFS4_WRITE_LT; | |
3388 | } | |
3389 | ||
1da177e4 LT |
3390 | static struct nfs4_stateowner * |
3391 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3392 | struct xdr_netobj *owner) | |
3393 | { | |
3394 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3395 | struct nfs4_stateowner *op; | |
3396 | ||
3397 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3398 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3399 | return op; |
3400 | } | |
3401 | return NULL; | |
3402 | } | |
3403 | ||
3404 | /* | |
3405 | * Alloc a lock owner structure. | |
3406 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3407 | * occured. | |
3408 | * | |
3409 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3410 | */ |
3411 | ||
3412 | static struct nfs4_stateowner * | |
3413 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3414 | struct nfs4_stateowner *sop; | |
3415 | struct nfs4_replay *rp; | |
3416 | unsigned int idhashval; | |
3417 | ||
3418 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3419 | return NULL; | |
3420 | idhashval = lockownerid_hashval(current_ownerid); | |
3421 | INIT_LIST_HEAD(&sop->so_idhash); | |
3422 | INIT_LIST_HEAD(&sop->so_strhash); | |
3423 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3424 | INIT_LIST_HEAD(&sop->so_stateids); |
3425 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3426 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3427 | sop->so_time = 0; | |
3428 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3429 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3430 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3431 | sop->so_is_open_owner = 0; |
3432 | sop->so_id = current_ownerid++; | |
3433 | sop->so_client = clp; | |
b59e3c0e NB |
3434 | /* It is the openowner seqid that will be incremented in encode in the |
3435 | * case of new lockowners; so increment the lock seqid manually: */ | |
3436 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3437 | sop->so_confirmed = 1; |
3438 | rp = &sop->so_replay; | |
de1ae286 | 3439 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3440 | rp->rp_buflen = 0; |
3441 | rp->rp_buf = rp->rp_ibuf; | |
3442 | return sop; | |
3443 | } | |
3444 | ||
fd39ca9a | 3445 | static struct nfs4_stateid * |
1da177e4 LT |
3446 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3447 | { | |
3448 | struct nfs4_stateid *stp; | |
3449 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3450 | ||
5ac049ac N |
3451 | stp = nfs4_alloc_stateid(); |
3452 | if (stp == NULL) | |
1da177e4 LT |
3453 | goto out; |
3454 | INIT_LIST_HEAD(&stp->st_hash); | |
3455 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3456 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3457 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3458 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3459 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3460 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3461 | stp->st_stateowner = sop; |
13cd2184 | 3462 | get_nfs4_file(fp); |
1da177e4 | 3463 | stp->st_file = fp; |
e4e83ea4 | 3464 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3465 | stp->st_stateid.si_stateownerid = sop->so_id; |
3466 | stp->st_stateid.si_fileid = fp->fi_id; | |
3467 | stp->st_stateid.si_generation = 0; | |
3468 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3469 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3470 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3471 | stp->st_openstp = open_stp; |
1da177e4 LT |
3472 | |
3473 | out: | |
3474 | return stp; | |
3475 | } | |
3476 | ||
fd39ca9a | 3477 | static int |
1da177e4 LT |
3478 | check_lock_length(u64 offset, u64 length) |
3479 | { | |
87df4de8 | 3480 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3481 | LOFF_OVERFLOW(offset, length))); |
3482 | } | |
3483 | ||
3484 | /* | |
3485 | * LOCK operation | |
3486 | */ | |
b37ad28b | 3487 | __be32 |
ca364317 | 3488 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3489 | struct nfsd4_lock *lock) |
1da177e4 | 3490 | { |
3e9e3dbe | 3491 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3492 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3493 | struct nfs4_stateid *lock_stp; |
3494 | struct file *filp; | |
3495 | struct file_lock file_lock; | |
8dc7c311 | 3496 | struct file_lock conflock; |
b37ad28b | 3497 | __be32 status = 0; |
1da177e4 | 3498 | unsigned int strhashval; |
150b3934 | 3499 | unsigned int cmd; |
b8dd7b9a | 3500 | int err; |
1da177e4 LT |
3501 | |
3502 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3503 | (long long) lock->lk_offset, | |
3504 | (long long) lock->lk_length); | |
3505 | ||
1da177e4 LT |
3506 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3507 | return nfserr_inval; | |
3508 | ||
ca364317 | 3509 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3510 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3511 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3512 | return status; | |
3513 | } | |
3514 | ||
1da177e4 LT |
3515 | nfs4_lock_state(); |
3516 | ||
3517 | if (lock->lk_is_new) { | |
893f8770 N |
3518 | /* |
3519 | * Client indicates that this is a new lockowner. | |
3520 | * Use open owner and open stateid to create lock owner and | |
3521 | * lock stateid. | |
3522 | */ | |
1da177e4 LT |
3523 | struct nfs4_stateid *open_stp = NULL; |
3524 | struct nfs4_file *fp; | |
3525 | ||
3526 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3527 | if (!nfsd4_has_session(cstate) && |
3528 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3529 | goto out; |
1da177e4 | 3530 | |
1da177e4 | 3531 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3532 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3533 | lock->lk_new_open_seqid, |
3534 | &lock->lk_new_open_stateid, | |
f3362737 | 3535 | OPEN_STATE, |
3a65588a | 3536 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3537 | lock); |
37515177 | 3538 | if (status) |
1da177e4 | 3539 | goto out; |
3a65588a | 3540 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3541 | /* create lockowner and lock stateid */ |
3542 | fp = open_stp->st_file; | |
3543 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3544 | open_sop->so_client->cl_clientid.cl_id, | |
3545 | &lock->v.new.owner); | |
3e9e3dbe N |
3546 | /* XXX: Do we need to check for duplicate stateowners on |
3547 | * the same file, or should they just be allowed (and | |
3548 | * create new stateids)? */ | |
1da177e4 | 3549 | status = nfserr_resource; |
b59e3c0e NB |
3550 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3551 | open_sop->so_client, open_stp, lock); | |
3552 | if (lock_sop == NULL) | |
1da177e4 | 3553 | goto out; |
b59e3c0e | 3554 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3555 | if (lock_stp == NULL) |
1da177e4 | 3556 | goto out; |
1da177e4 LT |
3557 | } else { |
3558 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3559 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3560 | lock->lk_old_lock_seqid, |
3561 | &lock->lk_old_lock_stateid, | |
f3362737 | 3562 | LOCK_STATE, |
3a65588a | 3563 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3564 | if (status) |
3565 | goto out; | |
3a65588a | 3566 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3567 | } |
3a65588a | 3568 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3569 | filp = lock_stp->st_vfs_file; |
3570 | ||
0dd395dc | 3571 | status = nfserr_grace; |
af558e33 | 3572 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3573 | goto out; |
3574 | status = nfserr_no_grace; | |
af558e33 | 3575 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3576 | goto out; |
3577 | ||
1da177e4 LT |
3578 | locks_init_lock(&file_lock); |
3579 | switch (lock->lk_type) { | |
3580 | case NFS4_READ_LT: | |
3581 | case NFS4_READW_LT: | |
3582 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3583 | cmd = F_SETLK; |
1da177e4 LT |
3584 | break; |
3585 | case NFS4_WRITE_LT: | |
3586 | case NFS4_WRITEW_LT: | |
3587 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3588 | cmd = F_SETLK; |
1da177e4 LT |
3589 | break; |
3590 | default: | |
3591 | status = nfserr_inval; | |
3592 | goto out; | |
3593 | } | |
b59e3c0e | 3594 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3595 | file_lock.fl_pid = current->tgid; |
3596 | file_lock.fl_file = filp; | |
3597 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3598 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3599 | |
3600 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3601 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3602 | nfs4_transform_lock_offset(&file_lock); |
3603 | ||
3604 | /* | |
3605 | * Try to lock the file in the VFS. | |
3606 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3607 | */ | |
3608 | ||
fd85b817 | 3609 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3610 | switch (-err) { |
1da177e4 LT |
3611 | case 0: /* success! */ |
3612 | update_stateid(&lock_stp->st_stateid); | |
3613 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3614 | sizeof(stateid_t)); | |
b8dd7b9a | 3615 | status = 0; |
eb76b3fd AA |
3616 | break; |
3617 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3618 | status = nfserr_denied; | |
3619 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3620 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3621 | break; | |
1da177e4 LT |
3622 | case (EDEADLK): |
3623 | status = nfserr_deadlock; | |
eb76b3fd | 3624 | break; |
1da177e4 | 3625 | default: |
fd85b817 | 3626 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3627 | status = nfserr_resource; |
3628 | break; | |
1da177e4 | 3629 | } |
1da177e4 | 3630 | out: |
8a280510 | 3631 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3632 | release_lockowner(lock_sop); |
3a65588a BF |
3633 | if (lock->lk_replay_owner) { |
3634 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3635 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3636 | } |
1da177e4 LT |
3637 | nfs4_unlock_state(); |
3638 | return status; | |
3639 | } | |
3640 | ||
55ef1274 BF |
3641 | /* |
3642 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3643 | * so we do a temporary open here just to get an open file to pass to | |
3644 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3645 | * inode operation.) | |
3646 | */ | |
3647 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3648 | { | |
3649 | struct file *file; | |
3650 | int err; | |
3651 | ||
3652 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3653 | if (err) | |
3654 | return err; | |
3655 | err = vfs_test_lock(file, lock); | |
3656 | nfsd_close(file); | |
3657 | return err; | |
3658 | } | |
3659 | ||
1da177e4 LT |
3660 | /* |
3661 | * LOCKT operation | |
3662 | */ | |
b37ad28b | 3663 | __be32 |
ca364317 BF |
3664 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3665 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3666 | { |
3667 | struct inode *inode; | |
1da177e4 | 3668 | struct file_lock file_lock; |
fd85b817 | 3669 | int error; |
b37ad28b | 3670 | __be32 status; |
1da177e4 | 3671 | |
af558e33 | 3672 | if (locks_in_grace()) |
1da177e4 LT |
3673 | return nfserr_grace; |
3674 | ||
3675 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3676 | return nfserr_inval; | |
3677 | ||
3678 | lockt->lt_stateowner = NULL; | |
3679 | nfs4_lock_state(); | |
3680 | ||
3681 | status = nfserr_stale_clientid; | |
60adfc50 | 3682 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3683 | goto out; |
1da177e4 | 3684 | |
ca364317 | 3685 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3686 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3687 | if (status == nfserr_symlink) |
3688 | status = nfserr_inval; | |
3689 | goto out; | |
3690 | } | |
3691 | ||
ca364317 | 3692 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3693 | locks_init_lock(&file_lock); |
3694 | switch (lockt->lt_type) { | |
3695 | case NFS4_READ_LT: | |
3696 | case NFS4_READW_LT: | |
3697 | file_lock.fl_type = F_RDLCK; | |
3698 | break; | |
3699 | case NFS4_WRITE_LT: | |
3700 | case NFS4_WRITEW_LT: | |
3701 | file_lock.fl_type = F_WRLCK; | |
3702 | break; | |
3703 | default: | |
2fdada03 | 3704 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3705 | status = nfserr_inval; |
3706 | goto out; | |
3707 | } | |
3708 | ||
3709 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3710 | &lockt->lt_clientid, &lockt->lt_owner); | |
3711 | if (lockt->lt_stateowner) | |
3712 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3713 | file_lock.fl_pid = current->tgid; | |
3714 | file_lock.fl_flags = FL_POSIX; | |
3715 | ||
3716 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3717 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3718 | |
3719 | nfs4_transform_lock_offset(&file_lock); | |
3720 | ||
1da177e4 | 3721 | status = nfs_ok; |
55ef1274 | 3722 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3723 | if (error) { |
3724 | status = nfserrno(error); | |
3725 | goto out; | |
3726 | } | |
9d6a8c5c | 3727 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3728 | status = nfserr_denied; |
9d6a8c5c | 3729 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3730 | } |
3731 | out: | |
3732 | nfs4_unlock_state(); | |
3733 | return status; | |
3734 | } | |
3735 | ||
b37ad28b | 3736 | __be32 |
ca364317 | 3737 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3738 | struct nfsd4_locku *locku) |
1da177e4 LT |
3739 | { |
3740 | struct nfs4_stateid *stp; | |
3741 | struct file *filp = NULL; | |
3742 | struct file_lock file_lock; | |
b37ad28b | 3743 | __be32 status; |
b8dd7b9a | 3744 | int err; |
1da177e4 LT |
3745 | |
3746 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3747 | (long long) locku->lu_offset, | |
3748 | (long long) locku->lu_length); | |
3749 | ||
3750 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3751 | return nfserr_inval; | |
3752 | ||
3753 | nfs4_lock_state(); | |
3754 | ||
dd453dfd | 3755 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3756 | locku->lu_seqid, |
3757 | &locku->lu_stateid, | |
f3362737 | 3758 | LOCK_STATE, |
1da177e4 LT |
3759 | &locku->lu_stateowner, &stp, NULL))) |
3760 | goto out; | |
3761 | ||
3762 | filp = stp->st_vfs_file; | |
3763 | BUG_ON(!filp); | |
3764 | locks_init_lock(&file_lock); | |
3765 | file_lock.fl_type = F_UNLCK; | |
3766 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3767 | file_lock.fl_pid = current->tgid; | |
3768 | file_lock.fl_file = filp; | |
3769 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3770 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3771 | file_lock.fl_start = locku->lu_offset; |
3772 | ||
87df4de8 | 3773 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3774 | nfs4_transform_lock_offset(&file_lock); |
3775 | ||
3776 | /* | |
3777 | * Try to unlock the file in the VFS. | |
3778 | */ | |
fd85b817 | 3779 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3780 | if (err) { |
fd85b817 | 3781 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3782 | goto out_nfserr; |
3783 | } | |
3784 | /* | |
3785 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3786 | */ | |
3787 | update_stateid(&stp->st_stateid); | |
3788 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3789 | ||
3790 | out: | |
f2327d9a | 3791 | if (locku->lu_stateowner) { |
1da177e4 | 3792 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3793 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3794 | } |
1da177e4 LT |
3795 | nfs4_unlock_state(); |
3796 | return status; | |
3797 | ||
3798 | out_nfserr: | |
b8dd7b9a | 3799 | status = nfserrno(err); |
1da177e4 LT |
3800 | goto out; |
3801 | } | |
3802 | ||
3803 | /* | |
3804 | * returns | |
3805 | * 1: locks held by lockowner | |
3806 | * 0: no locks held by lockowner | |
3807 | */ | |
3808 | static int | |
3809 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3810 | { | |
3811 | struct file_lock **flpp; | |
7eaa36e2 | 3812 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3813 | int status = 0; |
3814 | ||
3815 | lock_kernel(); | |
3816 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3817 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3818 | status = 1; |
3819 | goto out; | |
796dadfd | 3820 | } |
1da177e4 LT |
3821 | } |
3822 | out: | |
3823 | unlock_kernel(); | |
3824 | return status; | |
3825 | } | |
3826 | ||
b37ad28b | 3827 | __be32 |
b591480b BF |
3828 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3829 | struct nfsd4_compound_state *cstate, | |
3830 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3831 | { |
3832 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3833 | struct nfs4_stateowner *sop; |
3834 | struct nfs4_stateid *stp; | |
1da177e4 | 3835 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3836 | struct list_head matches; |
3837 | int i; | |
b37ad28b | 3838 | __be32 status; |
1da177e4 LT |
3839 | |
3840 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3841 | clid->cl_boot, clid->cl_id); | |
3842 | ||
3843 | /* XXX check for lease expiration */ | |
3844 | ||
3845 | status = nfserr_stale_clientid; | |
849823c5 | 3846 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3847 | return status; |
1da177e4 LT |
3848 | |
3849 | nfs4_lock_state(); | |
3850 | ||
3e9e3dbe N |
3851 | status = nfserr_locks_held; |
3852 | /* XXX: we're doing a linear search through all the lockowners. | |
3853 | * Yipes! For now we'll just hope clients aren't really using | |
3854 | * release_lockowner much, but eventually we have to fix these | |
3855 | * data structures. */ | |
3856 | INIT_LIST_HEAD(&matches); | |
3857 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3858 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3859 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3860 | continue; |
3861 | list_for_each_entry(stp, &sop->so_stateids, | |
3862 | st_perstateowner) { | |
3863 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3864 | goto out; | |
3865 | /* Note: so_perclient unused for lockowners, | |
3866 | * so it's OK to fool with here. */ | |
3867 | list_add(&sop->so_perclient, &matches); | |
3868 | } | |
1da177e4 | 3869 | } |
3e9e3dbe N |
3870 | } |
3871 | /* Clients probably won't expect us to return with some (but not all) | |
3872 | * of the lockowner state released; so don't release any until all | |
3873 | * have been checked. */ | |
3874 | status = nfs_ok; | |
0fa822e4 N |
3875 | while (!list_empty(&matches)) { |
3876 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3877 | so_perclient); | |
3878 | /* unhash_stateowner deletes so_perclient only | |
3879 | * for openowners. */ | |
3880 | list_del(&sop->so_perclient); | |
f044ff83 | 3881 | release_lockowner(sop); |
1da177e4 LT |
3882 | } |
3883 | out: | |
3884 | nfs4_unlock_state(); | |
3885 | return status; | |
3886 | } | |
3887 | ||
3888 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3889 | alloc_reclaim(void) |
1da177e4 | 3890 | { |
a55370a3 | 3891 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3892 | } |
3893 | ||
c7b9a459 | 3894 | int |
a1bcecd2 | 3895 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3896 | { |
3897 | unsigned int strhashval = clientstr_hashval(name); | |
3898 | struct nfs4_client *clp; | |
3899 | ||
a1bcecd2 | 3900 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3901 | return clp ? 1 : 0; |
3902 | } | |
3903 | ||
1da177e4 LT |
3904 | /* |
3905 | * failure => all reset bets are off, nfserr_no_grace... | |
3906 | */ | |
190e4fbf N |
3907 | int |
3908 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3909 | { |
3910 | unsigned int strhashval; | |
3911 | struct nfs4_client_reclaim *crp = NULL; | |
3912 | ||
a55370a3 N |
3913 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3914 | crp = alloc_reclaim(); | |
1da177e4 LT |
3915 | if (!crp) |
3916 | return 0; | |
a55370a3 | 3917 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3918 | INIT_LIST_HEAD(&crp->cr_strhash); |
3919 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3920 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3921 | reclaim_str_hashtbl_size++; |
3922 | return 1; | |
3923 | } | |
3924 | ||
3925 | static void | |
3926 | nfs4_release_reclaim(void) | |
3927 | { | |
3928 | struct nfs4_client_reclaim *crp = NULL; | |
3929 | int i; | |
3930 | ||
1da177e4 LT |
3931 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3932 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3933 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3934 | struct nfs4_client_reclaim, cr_strhash); | |
3935 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3936 | kfree(crp); |
3937 | reclaim_str_hashtbl_size--; | |
3938 | } | |
3939 | } | |
3940 | BUG_ON(reclaim_str_hashtbl_size); | |
3941 | } | |
3942 | ||
3943 | /* | |
3944 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3945 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3946 | nfs4_find_reclaim_client(clientid_t *clid) |
3947 | { | |
3948 | unsigned int strhashval; | |
3949 | struct nfs4_client *clp; | |
3950 | struct nfs4_client_reclaim *crp = NULL; | |
3951 | ||
3952 | ||
3953 | /* find clientid in conf_id_hashtbl */ | |
3954 | clp = find_confirmed_client(clid); | |
3955 | if (clp == NULL) | |
3956 | return NULL; | |
3957 | ||
a55370a3 N |
3958 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3959 | clp->cl_name.len, clp->cl_name.data, | |
3960 | clp->cl_recdir); | |
1da177e4 LT |
3961 | |
3962 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3963 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3964 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3965 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3966 | return crp; |
3967 | } | |
3968 | } | |
3969 | return NULL; | |
3970 | } | |
3971 | ||
3972 | /* | |
3973 | * Called from OPEN. Look for clientid in reclaim list. | |
3974 | */ | |
b37ad28b | 3975 | __be32 |
1da177e4 LT |
3976 | nfs4_check_open_reclaim(clientid_t *clid) |
3977 | { | |
dfc83565 | 3978 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3979 | } |
3980 | ||
ac4d8ff2 | 3981 | /* initialization to perform at module load time: */ |
1da177e4 | 3982 | |
e8ff2a84 | 3983 | int |
ac4d8ff2 | 3984 | nfs4_state_init(void) |
1da177e4 | 3985 | { |
e8ff2a84 | 3986 | int i, status; |
1da177e4 | 3987 | |
e8ff2a84 BF |
3988 | status = nfsd4_init_slabs(); |
3989 | if (status) | |
3990 | return status; | |
1da177e4 LT |
3991 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3992 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3993 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3994 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3995 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3996 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3997 | } |
5282fd72 ME |
3998 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3999 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4000 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4001 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4002 | } | |
4003 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4004 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4005 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4006 | } | |
4007 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4008 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4009 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4010 | } | |
4011 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4012 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4013 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4014 | } | |
1da177e4 | 4015 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4016 | INIT_LIST_HEAD(&close_lru); |
4017 | INIT_LIST_HEAD(&client_lru); | |
4018 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4019 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4020 | return 0; |
ac4d8ff2 N |
4021 | } |
4022 | ||
190e4fbf N |
4023 | static void |
4024 | nfsd4_load_reboot_recovery_data(void) | |
4025 | { | |
4026 | int status; | |
4027 | ||
0964a3d3 N |
4028 | nfs4_lock_state(); |
4029 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4030 | status = nfsd4_recdir_load(); |
0964a3d3 | 4031 | nfs4_unlock_state(); |
190e4fbf N |
4032 | if (status) |
4033 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4034 | } | |
4035 | ||
c2f1a551 MS |
4036 | /* |
4037 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4038 | * client may quite reasonably hang on to a delegation as long as it has | |
4039 | * the inode cached. This becomes an obvious problem the first time a | |
4040 | * client's inode cache approaches the size of the server's total memory. | |
4041 | * | |
4042 | * For now we avoid this problem by imposing a hard limit on the number | |
4043 | * of delegations, which varies according to the server's memory size. | |
4044 | */ | |
4045 | static void | |
4046 | set_max_delegations(void) | |
4047 | { | |
4048 | /* | |
4049 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4050 | * estimates suggest that in the worst case (where every delegation | |
4051 | * is for a different inode), a delegation could take about 1.5K, | |
4052 | * giving a worst case usage of about 6% of memory. | |
4053 | */ | |
4054 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4055 | } | |
4056 | ||
ac4d8ff2 N |
4057 | /* initialization to perform when the nfsd service is started: */ |
4058 | ||
29ab23cc | 4059 | static int |
ac4d8ff2 N |
4060 | __nfs4_state_start(void) |
4061 | { | |
b5a1a81e BF |
4062 | int ret; |
4063 | ||
1da177e4 | 4064 | boot_time = get_seconds(); |
af558e33 | 4065 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4066 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4067 | nfsd4_grace); |
b5a1a81e BF |
4068 | ret = set_callback_cred(); |
4069 | if (ret) | |
4070 | return -ENOMEM; | |
58da282b | 4071 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4072 | if (laundry_wq == NULL) |
4073 | return -ENOMEM; | |
b5a1a81e BF |
4074 | ret = nfsd4_create_callback_queue(); |
4075 | if (ret) | |
4076 | goto out_free_laundry; | |
e46b498c | 4077 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4078 | set_max_delegations(); |
b5a1a81e BF |
4079 | return 0; |
4080 | out_free_laundry: | |
4081 | destroy_workqueue(laundry_wq); | |
4082 | return ret; | |
1da177e4 LT |
4083 | } |
4084 | ||
29ab23cc | 4085 | int |
76a3550e | 4086 | nfs4_state_start(void) |
1da177e4 | 4087 | { |
190e4fbf | 4088 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4089 | return __nfs4_state_start(); |
1da177e4 LT |
4090 | } |
4091 | ||
1da177e4 LT |
4092 | static void |
4093 | __nfs4_state_shutdown(void) | |
4094 | { | |
4095 | int i; | |
4096 | struct nfs4_client *clp = NULL; | |
4097 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4098 | struct list_head *pos, *next, reaplist; |
4099 | ||
1da177e4 LT |
4100 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4101 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4102 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4103 | expire_client(clp); | |
4104 | } | |
4105 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4106 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4107 | expire_client(clp); | |
4108 | } | |
4109 | } | |
4110 | INIT_LIST_HEAD(&reaplist); | |
4111 | spin_lock(&recall_lock); | |
4112 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4113 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4114 | list_move(&dp->dl_recall_lru, &reaplist); | |
4115 | } | |
4116 | spin_unlock(&recall_lock); | |
4117 | list_for_each_safe(pos, next, &reaplist) { | |
4118 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4119 | list_del_init(&dp->dl_recall_lru); | |
4120 | unhash_delegation(dp); | |
4121 | } | |
4122 | ||
190e4fbf | 4123 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4124 | } |
4125 | ||
4126 | void | |
4127 | nfs4_state_shutdown(void) | |
4128 | { | |
5e8d5c29 N |
4129 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4130 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4131 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4132 | nfs4_lock_state(); |
4133 | nfs4_release_reclaim(); | |
4134 | __nfs4_state_shutdown(); | |
b5a1a81e | 4135 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4136 | nfs4_unlock_state(); |
4137 | } | |
4138 | ||
3dd98a3b JL |
4139 | /* |
4140 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4141 | * accessed when nfsd is starting. | |
4142 | */ | |
0964a3d3 N |
4143 | static void |
4144 | nfs4_set_recdir(char *recdir) | |
4145 | { | |
0964a3d3 | 4146 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4147 | } |
4148 | ||
4149 | /* | |
4150 | * Change the NFSv4 recovery directory to recdir. | |
4151 | */ | |
4152 | int | |
4153 | nfs4_reset_recoverydir(char *recdir) | |
4154 | { | |
4155 | int status; | |
a63bb996 | 4156 | struct path path; |
0964a3d3 | 4157 | |
a63bb996 | 4158 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4159 | if (status) |
4160 | return status; | |
4161 | status = -ENOTDIR; | |
a63bb996 | 4162 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4163 | nfs4_set_recdir(recdir); |
4164 | status = 0; | |
4165 | } | |
a63bb996 | 4166 | path_put(&path); |
0964a3d3 N |
4167 | return status; |
4168 | } | |
4169 | ||
3dd98a3b JL |
4170 | char * |
4171 | nfs4_recoverydir(void) | |
4172 | { | |
4173 | return user_recovery_dirname; | |
4174 | } |