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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 | ||
998db52c | 165 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
166 | { |
167 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
168 | atomic_inc(&fp->fi_access[oflag]); | |
169 | } | |
170 | ||
998db52c BF |
171 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
172 | { | |
173 | if (oflag == O_RDWR) { | |
174 | __nfs4_file_get_access(fp, O_RDONLY); | |
175 | __nfs4_file_get_access(fp, O_WRONLY); | |
176 | } else | |
177 | __nfs4_file_get_access(fp, oflag); | |
178 | } | |
179 | ||
180 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
181 | { |
182 | if (fp->fi_fds[oflag]) { | |
183 | fput(fp->fi_fds[oflag]); | |
184 | fp->fi_fds[oflag] = NULL; | |
185 | } | |
186 | } | |
187 | ||
998db52c | 188 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
189 | { |
190 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
191 | nfs4_file_put_fd(fp, O_RDWR); | |
192 | nfs4_file_put_fd(fp, oflag); | |
193 | } | |
194 | } | |
195 | ||
998db52c BF |
196 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
197 | { | |
198 | if (oflag == O_RDWR) { | |
199 | __nfs4_file_put_access(fp, O_RDONLY); | |
200 | __nfs4_file_put_access(fp, O_WRONLY); | |
201 | } else | |
202 | __nfs4_file_put_access(fp, oflag); | |
203 | } | |
204 | ||
1da177e4 LT |
205 | static struct nfs4_delegation * |
206 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
207 | { | |
208 | struct nfs4_delegation *dp; | |
209 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 210 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
211 | |
212 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
213 | /* |
214 | * Major work on the lease subsystem (for example, to support | |
215 | * calbacks on stat) will be required before we can support | |
216 | * write delegations properly. | |
217 | */ | |
218 | if (type != NFS4_OPEN_DELEGATE_READ) | |
219 | return NULL; | |
47f9940c MS |
220 | if (fp->fi_had_conflict) |
221 | return NULL; | |
c2f1a551 | 222 | if (num_delegations > max_delegations) |
ef0f3390 | 223 | return NULL; |
5b2d21c1 N |
224 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
225 | if (dp == NULL) | |
1da177e4 | 226 | return dp; |
ef0f3390 | 227 | num_delegations++; |
ea1da636 N |
228 | INIT_LIST_HEAD(&dp->dl_perfile); |
229 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
230 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
231 | dp->dl_client = clp; | |
13cd2184 | 232 | get_nfs4_file(fp); |
1da177e4 | 233 | dp->dl_file = fp; |
f9d7562f | 234 | nfs4_file_get_access(fp, O_RDONLY); |
1da177e4 | 235 | dp->dl_flock = NULL; |
1da177e4 | 236 | dp->dl_type = type; |
b53d40c5 | 237 | dp->dl_ident = cb->cb_ident; |
e4e83ea4 | 238 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
239 | dp->dl_stateid.si_stateownerid = current_delegid++; |
240 | dp->dl_stateid.si_fileid = 0; | |
241 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 242 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
243 | dp->dl_time = 0; |
244 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
245 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
246 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
b5a1a81e | 247 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
248 | return dp; |
249 | } | |
250 | ||
251 | void | |
252 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
253 | { | |
254 | if (atomic_dec_and_test(&dp->dl_count)) { | |
255 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 256 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 257 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 258 | num_delegations--; |
1da177e4 LT |
259 | } |
260 | } | |
261 | ||
262 | /* Remove the associated file_lock first, then remove the delegation. | |
263 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
264 | * the i_flock list, eventually calling nfsd's lock_manager | |
265 | * fl_release_callback. | |
266 | */ | |
267 | static void | |
268 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
269 | { | |
f9d7562f | 270 | struct file *filp = find_readable_file(dp->dl_file); |
1da177e4 LT |
271 | |
272 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
c907132d | 273 | if (dp->dl_flock) |
a9933cea | 274 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
f9d7562f | 275 | nfs4_file_put_access(dp->dl_file, O_RDONLY); |
1da177e4 LT |
276 | } |
277 | ||
278 | /* Called under the state lock. */ | |
279 | static void | |
280 | unhash_delegation(struct nfs4_delegation *dp) | |
281 | { | |
ea1da636 N |
282 | list_del_init(&dp->dl_perfile); |
283 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
284 | spin_lock(&recall_lock); |
285 | list_del_init(&dp->dl_recall_lru); | |
286 | spin_unlock(&recall_lock); | |
287 | nfs4_close_delegation(dp); | |
288 | nfs4_put_delegation(dp); | |
289 | } | |
290 | ||
291 | /* | |
292 | * SETCLIENTID state | |
293 | */ | |
294 | ||
36acb66b | 295 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
296 | static DEFINE_SPINLOCK(client_lock); |
297 | ||
1da177e4 LT |
298 | /* Hash tables for nfs4_clientid state */ |
299 | #define CLIENT_HASH_BITS 4 | |
300 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
301 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
302 | ||
303 | #define clientid_hashval(id) \ | |
304 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
305 | #define clientstr_hashval(name) \ |
306 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
307 | /* |
308 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
309 | * used in reboot/reset lease grace period processing | |
310 | * | |
311 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
312 | * setclientid_confirmed info. | |
313 | * | |
314 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
315 | * setclientid info. | |
316 | * | |
317 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
318 | * for lease renewal. | |
319 | * | |
320 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
321 | * for last close replay. | |
322 | */ | |
323 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
324 | static int reclaim_str_hashtbl_size = 0; | |
325 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
326 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
327 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
328 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
329 | static struct list_head client_lru; | |
330 | static struct list_head close_lru; | |
331 | ||
2283963f BF |
332 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
333 | { | |
334 | list_del(&stp->st_hash); | |
335 | list_del(&stp->st_perfile); | |
336 | list_del(&stp->st_perstateowner); | |
337 | } | |
338 | ||
339 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
340 | { | |
341 | put_nfs4_file(stp->st_file); | |
342 | kmem_cache_free(stateid_slab, stp); | |
343 | } | |
344 | ||
345 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
346 | { | |
f9d7562f BF |
347 | struct file *file; |
348 | ||
2283963f | 349 | unhash_generic_stateid(stp); |
f9d7562f BF |
350 | file = find_any_file(stp->st_file); |
351 | if (file) | |
352 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
2283963f BF |
353 | free_generic_stateid(stp); |
354 | } | |
355 | ||
f044ff83 BF |
356 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
357 | { | |
358 | struct nfs4_stateid *stp; | |
359 | ||
360 | list_del(&sop->so_idhash); | |
361 | list_del(&sop->so_strhash); | |
362 | list_del(&sop->so_perstateid); | |
363 | while (!list_empty(&sop->so_stateids)) { | |
364 | stp = list_first_entry(&sop->so_stateids, | |
365 | struct nfs4_stateid, st_perstateowner); | |
366 | release_lock_stateid(stp); | |
367 | } | |
368 | } | |
369 | ||
370 | static void release_lockowner(struct nfs4_stateowner *sop) | |
371 | { | |
372 | unhash_lockowner(sop); | |
373 | nfs4_put_stateowner(sop); | |
374 | } | |
375 | ||
f1d110ca BF |
376 | static void |
377 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
378 | { | |
379 | struct nfs4_stateowner *lock_sop; | |
380 | ||
381 | while (!list_empty(&open_stp->st_lockowners)) { | |
382 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
383 | struct nfs4_stateowner, so_perstateid); | |
384 | /* list_del(&open_stp->st_lockowners); */ | |
385 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 386 | release_lockowner(lock_sop); |
f1d110ca BF |
387 | } |
388 | } | |
389 | ||
f9d7562f BF |
390 | /* |
391 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
392 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
393 | * only what share bits are currently in force, but also what | |
394 | * combinations of share bits previous opens have used. This allows us | |
395 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
396 | * return an error if the client attempt to downgrade to a combination | |
397 | * of share bits not explicable by closing some of its previous opens. | |
398 | * | |
399 | * XXX: This enforcement is actually incomplete, since we don't keep | |
400 | * track of access/deny bit combinations; so, e.g., we allow: | |
401 | * | |
402 | * OPEN allow read, deny write | |
403 | * OPEN allow both, deny none | |
404 | * DOWNGRADE allow read, deny none | |
405 | * | |
406 | * which we should reject. | |
407 | */ | |
408 | static void | |
409 | set_access(unsigned int *access, unsigned long bmap) { | |
410 | int i; | |
411 | ||
412 | *access = 0; | |
413 | for (i = 1; i < 4; i++) { | |
414 | if (test_bit(i, &bmap)) | |
415 | *access |= i; | |
416 | } | |
417 | } | |
418 | ||
419 | static void | |
420 | set_deny(unsigned int *deny, unsigned long bmap) { | |
421 | int i; | |
422 | ||
423 | *deny = 0; | |
424 | for (i = 0; i < 4; i++) { | |
425 | if (test_bit(i, &bmap)) | |
426 | *deny |= i ; | |
427 | } | |
428 | } | |
429 | ||
430 | static int | |
431 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
432 | unsigned int access, deny; | |
433 | ||
434 | set_access(&access, stp->st_access_bmap); | |
435 | set_deny(&deny, stp->st_deny_bmap); | |
436 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
437 | return 0; | |
438 | return 1; | |
439 | } | |
440 | ||
441 | static int nfs4_access_to_omode(u32 access) | |
442 | { | |
8f34a430 | 443 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
444 | case NFS4_SHARE_ACCESS_READ: |
445 | return O_RDONLY; | |
446 | case NFS4_SHARE_ACCESS_WRITE: | |
447 | return O_WRONLY; | |
448 | case NFS4_SHARE_ACCESS_BOTH: | |
449 | return O_RDWR; | |
450 | } | |
451 | BUG(); | |
452 | } | |
453 | ||
454 | static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) | |
455 | { | |
456 | unsigned int access; | |
457 | ||
458 | set_access(&access, stp->st_access_bmap); | |
459 | return nfs4_access_to_omode(access); | |
460 | } | |
461 | ||
2283963f BF |
462 | static void release_open_stateid(struct nfs4_stateid *stp) |
463 | { | |
f9d7562f BF |
464 | int oflag = nfs4_access_bmap_to_omode(stp); |
465 | ||
2283963f BF |
466 | unhash_generic_stateid(stp); |
467 | release_stateid_lockowners(stp); | |
f9d7562f | 468 | nfs4_file_put_access(stp->st_file, oflag); |
2283963f BF |
469 | free_generic_stateid(stp); |
470 | } | |
471 | ||
f044ff83 | 472 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
473 | { |
474 | struct nfs4_stateid *stp; | |
475 | ||
476 | list_del(&sop->so_idhash); | |
477 | list_del(&sop->so_strhash); | |
f044ff83 BF |
478 | list_del(&sop->so_perclient); |
479 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 480 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
481 | stp = list_first_entry(&sop->so_stateids, |
482 | struct nfs4_stateid, st_perstateowner); | |
483 | release_open_stateid(stp); | |
f1d110ca BF |
484 | } |
485 | } | |
486 | ||
f044ff83 | 487 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 488 | { |
f044ff83 | 489 | unhash_openowner(sop); |
f1d110ca BF |
490 | list_del(&sop->so_close_lru); |
491 | nfs4_put_stateowner(sop); | |
492 | } | |
493 | ||
5282fd72 ME |
494 | #define SESSION_HASH_SIZE 512 |
495 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
496 | ||
497 | static inline int | |
498 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
499 | { | |
500 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
501 | ||
502 | return sid->sequence % SESSION_HASH_SIZE; | |
503 | } | |
504 | ||
505 | static inline void | |
506 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
507 | { | |
508 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
509 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
510 | } | |
511 | ||
ec6b5d7b AA |
512 | static void |
513 | gen_sessionid(struct nfsd4_session *ses) | |
514 | { | |
515 | struct nfs4_client *clp = ses->se_client; | |
516 | struct nfsd4_sessionid *sid; | |
517 | ||
518 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
519 | sid->clientid = clp->cl_clientid; | |
520 | sid->sequence = current_sessionid++; | |
521 | sid->reserved = 0; | |
522 | } | |
523 | ||
524 | /* | |
a649637c AA |
525 | * The protocol defines ca_maxresponssize_cached to include the size of |
526 | * the rpc header, but all we need to cache is the data starting after | |
527 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
528 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
529 | * value that is the number of bytes in our cache plus a few additional | |
530 | * bytes. In order to stay on the safe side, and not promise more than | |
531 | * we can cache, those additional bytes must be the minimum possible: 24 | |
532 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
533 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
534 | * for the SEQUENCE op response: | |
535 | */ | |
536 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
537 | ||
538 | /* | |
539 | * Give the client the number of ca_maxresponsesize_cached slots it | |
540 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
541 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
542 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 543 | * |
a649637c AA |
544 | * If we run out of reserved DRC memory we should (up to a point) |
545 | * re-negotiate active sessions and reduce their slot usage to make | |
546 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 547 | */ |
a649637c | 548 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 549 | { |
a649637c | 550 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 551 | |
5d77ddfb AA |
552 | if (fchan->maxreqs < 1) |
553 | return nfserr_inval; | |
5d77ddfb | 554 | |
a649637c AA |
555 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
556 | size = NFSD_MIN_HDR_SEQ_SZ; | |
557 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
558 | if (size > NFSD_SLOT_CACHE_SIZE) | |
559 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 560 | |
a649637c AA |
561 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
562 | mem = fchan->maxreqs * size; | |
563 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
564 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
565 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
566 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
567 | mem = fchan->maxreqs * size; | |
568 | } | |
ec6b5d7b | 569 | |
4bd9b0f4 | 570 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
571 | /* bound the total session drc memory ussage */ |
572 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
573 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
574 | mem = fchan->maxreqs * size; | |
575 | } | |
0c193054 | 576 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 577 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 578 | |
b101ebbc | 579 | if (fchan->maxreqs == 0) |
4731030d | 580 | return nfserr_jukebox; |
a649637c AA |
581 | |
582 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 583 | return 0; |
ec6b5d7b AA |
584 | } |
585 | ||
586 | /* | |
587 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 588 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
589 | */ |
590 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
591 | struct nfsd4_channel_attrs *session_fchan, |
592 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
593 | { |
594 | int status = 0; | |
ddc04fd4 | 595 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
596 | |
597 | /* headerpadsz set to zero in encode routine */ | |
598 | ||
599 | /* Use the client's max request and max response size if possible */ | |
600 | if (fchan->maxreq_sz > maxcount) | |
601 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 602 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
603 | |
604 | if (fchan->maxresp_sz > maxcount) | |
605 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 606 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 607 | |
ec6b5d7b AA |
608 | /* Use the client's maxops if possible */ |
609 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
610 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 611 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 612 | |
ec6b5d7b AA |
613 | /* FIXME: Error means no more DRC pages so the server should |
614 | * recover pages from existing sessions. For now fail session | |
615 | * creation. | |
616 | */ | |
a649637c | 617 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 618 | |
a649637c | 619 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 620 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
621 | |
622 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
623 | return status; |
624 | } | |
625 | ||
557ce264 AA |
626 | static void |
627 | free_session_slots(struct nfsd4_session *ses) | |
628 | { | |
629 | int i; | |
630 | ||
631 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
632 | kfree(ses->se_slots[i]); | |
633 | } | |
634 | ||
efe0cb6d BF |
635 | /* |
636 | * We don't actually need to cache the rpc and session headers, so we | |
637 | * can allocate a little less for each slot: | |
638 | */ | |
639 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
640 | { | |
641 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
642 | } | |
643 | ||
ec6b5d7b AA |
644 | static int |
645 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
646 | struct nfsd4_create_session *cses) | |
647 | { | |
648 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
649 | struct nfsd4_slot *sp; |
650 | int idx, slotsize, cachesize, i; | |
651 | int status; | |
ec6b5d7b AA |
652 | |
653 | memset(&tmp, 0, sizeof(tmp)); | |
654 | ||
655 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
656 | tmp.se_bchannel = cses->back_channel; |
657 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
658 | &cses->fore_channel); | |
ec6b5d7b AA |
659 | if (status) |
660 | goto out; | |
661 | ||
557ce264 AA |
662 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
663 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
664 | ||
4731030d | 665 | status = nfserr_jukebox; |
557ce264 AA |
666 | /* allocate struct nfsd4_session and slot table pointers in one piece */ |
667 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
668 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
669 | if (!new) | |
670 | goto out; | |
671 | ||
672 | memcpy(new, &tmp, sizeof(*new)); | |
673 | ||
557ce264 | 674 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 675 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
676 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
677 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
678 | if (!sp) | |
679 | goto out_free; | |
680 | new->se_slots[i] = sp; | |
681 | } | |
682 | ||
ec6b5d7b AA |
683 | new->se_client = clp; |
684 | gen_sessionid(new); | |
685 | idx = hash_sessionid(&new->se_sessionid); | |
686 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
687 | NFS4_MAX_SESSIONID_LEN); | |
688 | ||
689 | new->se_flags = cses->flags; | |
690 | kref_init(&new->se_ref); | |
9089f1b4 | 691 | spin_lock(&client_lock); |
ec6b5d7b AA |
692 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
693 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
9089f1b4 | 694 | spin_unlock(&client_lock); |
ec6b5d7b AA |
695 | |
696 | status = nfs_ok; | |
697 | out: | |
698 | return status; | |
557ce264 AA |
699 | out_free: |
700 | free_session_slots(new); | |
701 | kfree(new); | |
702 | goto out; | |
ec6b5d7b AA |
703 | } |
704 | ||
9089f1b4 | 705 | /* caller must hold client_lock */ |
5282fd72 ME |
706 | static struct nfsd4_session * |
707 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
708 | { | |
709 | struct nfsd4_session *elem; | |
710 | int idx; | |
711 | ||
712 | dump_sessionid(__func__, sessionid); | |
713 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
714 | /* Search in the appropriate list */ |
715 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
716 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
717 | NFS4_MAX_SESSIONID_LEN)) { | |
718 | return elem; | |
719 | } | |
720 | } | |
721 | ||
722 | dprintk("%s: session not found\n", __func__); | |
723 | return NULL; | |
724 | } | |
725 | ||
9089f1b4 | 726 | /* caller must hold client_lock */ |
7116ed6b | 727 | static void |
5282fd72 | 728 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
729 | { |
730 | list_del(&ses->se_hash); | |
731 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
732 | } |
733 | ||
7116ed6b AA |
734 | void |
735 | free_session(struct kref *kref) | |
736 | { | |
737 | struct nfsd4_session *ses; | |
dd829c45 | 738 | int mem; |
7116ed6b AA |
739 | |
740 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 741 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 742 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 743 | nfsd_drc_mem_used -= mem; |
be98d1bb | 744 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 745 | free_session_slots(ses); |
7116ed6b AA |
746 | kfree(ses); |
747 | } | |
748 | ||
36acb66b | 749 | /* must be called under the client_lock */ |
1da177e4 | 750 | static inline void |
36acb66b | 751 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 752 | { |
07cd4909 BH |
753 | if (is_client_expired(clp)) { |
754 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
755 | __func__, | |
756 | clp->cl_clientid.cl_boot, | |
757 | clp->cl_clientid.cl_id); | |
758 | return; | |
759 | } | |
760 | ||
1da177e4 LT |
761 | /* |
762 | * Move client to the end to the LRU list. | |
763 | */ | |
764 | dprintk("renewing client (clientid %08x/%08x)\n", | |
765 | clp->cl_clientid.cl_boot, | |
766 | clp->cl_clientid.cl_id); | |
767 | list_move_tail(&clp->cl_lru, &client_lru); | |
768 | clp->cl_time = get_seconds(); | |
769 | } | |
770 | ||
36acb66b BH |
771 | static inline void |
772 | renew_client(struct nfs4_client *clp) | |
773 | { | |
774 | spin_lock(&client_lock); | |
775 | renew_client_locked(clp); | |
776 | spin_unlock(&client_lock); | |
777 | } | |
778 | ||
1da177e4 LT |
779 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
780 | static int | |
781 | STALE_CLIENTID(clientid_t *clid) | |
782 | { | |
783 | if (clid->cl_boot == boot_time) | |
784 | return 0; | |
60adfc50 AA |
785 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
786 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
787 | return 1; |
788 | } | |
789 | ||
790 | /* | |
791 | * XXX Should we use a slab cache ? | |
792 | * This type of memory management is somewhat inefficient, but we use it | |
793 | * anyway since SETCLIENTID is not a common operation. | |
794 | */ | |
35bba9a3 | 795 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
796 | { |
797 | struct nfs4_client *clp; | |
798 | ||
35bba9a3 BF |
799 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
800 | if (clp == NULL) | |
801 | return NULL; | |
802 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
803 | if (clp->cl_name.data == NULL) { | |
804 | kfree(clp); | |
805 | return NULL; | |
1da177e4 | 806 | } |
35bba9a3 BF |
807 | memcpy(clp->cl_name.data, name.data, name.len); |
808 | clp->cl_name.len = name.len; | |
1da177e4 LT |
809 | return clp; |
810 | } | |
811 | ||
812 | static inline void | |
813 | free_client(struct nfs4_client *clp) | |
814 | { | |
815 | if (clp->cl_cred.cr_group_info) | |
816 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 817 | kfree(clp->cl_principal); |
1da177e4 LT |
818 | kfree(clp->cl_name.data); |
819 | kfree(clp); | |
820 | } | |
821 | ||
d7682988 BH |
822 | void |
823 | release_session_client(struct nfsd4_session *session) | |
824 | { | |
825 | struct nfs4_client *clp = session->se_client; | |
826 | ||
827 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
828 | return; | |
829 | if (is_client_expired(clp)) { | |
830 | free_client(clp); | |
831 | session->se_client = NULL; | |
832 | } else | |
833 | renew_client_locked(clp); | |
834 | spin_unlock(&client_lock); | |
d7682988 BH |
835 | } |
836 | ||
84d38ac9 BH |
837 | /* must be called under the client_lock */ |
838 | static inline void | |
839 | unhash_client_locked(struct nfs4_client *clp) | |
840 | { | |
07cd4909 | 841 | mark_client_expired(clp); |
84d38ac9 BH |
842 | list_del(&clp->cl_lru); |
843 | while (!list_empty(&clp->cl_sessions)) { | |
844 | struct nfsd4_session *ses; | |
845 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
846 | se_perclnt); | |
847 | unhash_session(ses); | |
848 | nfsd4_put_session(ses); | |
849 | } | |
850 | } | |
851 | ||
1da177e4 LT |
852 | static void |
853 | expire_client(struct nfs4_client *clp) | |
854 | { | |
855 | struct nfs4_stateowner *sop; | |
856 | struct nfs4_delegation *dp; | |
1da177e4 LT |
857 | struct list_head reaplist; |
858 | ||
1da177e4 LT |
859 | INIT_LIST_HEAD(&reaplist); |
860 | spin_lock(&recall_lock); | |
ea1da636 N |
861 | while (!list_empty(&clp->cl_delegations)) { |
862 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
863 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
864 | dp->dl_flock); | |
ea1da636 | 865 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
866 | list_move(&dp->dl_recall_lru, &reaplist); |
867 | } | |
868 | spin_unlock(&recall_lock); | |
869 | while (!list_empty(&reaplist)) { | |
870 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
871 | list_del_init(&dp->dl_recall_lru); | |
872 | unhash_delegation(dp); | |
873 | } | |
ea1da636 N |
874 | while (!list_empty(&clp->cl_openowners)) { |
875 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 876 | release_openowner(sop); |
1da177e4 | 877 | } |
84d38ac9 BH |
878 | nfsd4_set_callback_client(clp, NULL); |
879 | if (clp->cl_cb_conn.cb_xprt) | |
880 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
881 | list_del(&clp->cl_idhash); |
882 | list_del(&clp->cl_strhash); | |
be1fdf6c | 883 | spin_lock(&client_lock); |
84d38ac9 | 884 | unhash_client_locked(clp); |
46583e25 BH |
885 | if (atomic_read(&clp->cl_refcount) == 0) |
886 | free_client(clp); | |
be1fdf6c | 887 | spin_unlock(&client_lock); |
1da177e4 LT |
888 | } |
889 | ||
35bba9a3 BF |
890 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
891 | { | |
892 | memcpy(target->cl_verifier.data, source->data, | |
893 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
894 | } |
895 | ||
35bba9a3 BF |
896 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
897 | { | |
1da177e4 LT |
898 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
899 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
900 | } | |
901 | ||
35bba9a3 BF |
902 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
903 | { | |
1da177e4 LT |
904 | target->cr_uid = source->cr_uid; |
905 | target->cr_gid = source->cr_gid; | |
906 | target->cr_group_info = source->cr_group_info; | |
907 | get_group_info(target->cr_group_info); | |
908 | } | |
909 | ||
35bba9a3 | 910 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 911 | { |
a55370a3 | 912 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
913 | } |
914 | ||
915 | static int | |
599e0a22 BF |
916 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
917 | { | |
918 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
919 | } |
920 | ||
921 | static int | |
599e0a22 BF |
922 | same_clid(clientid_t *cl1, clientid_t *cl2) |
923 | { | |
924 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
925 | } |
926 | ||
927 | /* XXX what about NGROUP */ | |
928 | static int | |
599e0a22 BF |
929 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
930 | { | |
931 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
932 | } |
933 | ||
5ec7b46c BF |
934 | static void gen_clid(struct nfs4_client *clp) |
935 | { | |
936 | static u32 current_clientid = 1; | |
937 | ||
1da177e4 LT |
938 | clp->cl_clientid.cl_boot = boot_time; |
939 | clp->cl_clientid.cl_id = current_clientid++; | |
940 | } | |
941 | ||
deda2faa BF |
942 | static void gen_confirm(struct nfs4_client *clp) |
943 | { | |
944 | static u32 i; | |
945 | u32 *p; | |
1da177e4 | 946 | |
1da177e4 | 947 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
948 | *p++ = get_seconds(); |
949 | *p++ = i++; | |
1da177e4 LT |
950 | } |
951 | ||
b09333c4 RL |
952 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
953 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
954 | { | |
955 | struct nfs4_client *clp; | |
956 | struct sockaddr *sa = svc_addr(rqstp); | |
957 | char *princ; | |
958 | ||
959 | clp = alloc_client(name); | |
960 | if (clp == NULL) | |
961 | return NULL; | |
962 | ||
963 | princ = svc_gss_principal(rqstp); | |
964 | if (princ) { | |
965 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
966 | if (clp->cl_principal == NULL) { | |
967 | free_client(clp); | |
968 | return NULL; | |
969 | } | |
970 | } | |
971 | ||
972 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 973 | atomic_set(&clp->cl_refcount, 0); |
2bf23875 | 974 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
975 | INIT_LIST_HEAD(&clp->cl_idhash); |
976 | INIT_LIST_HEAD(&clp->cl_strhash); | |
977 | INIT_LIST_HEAD(&clp->cl_openowners); | |
978 | INIT_LIST_HEAD(&clp->cl_delegations); | |
979 | INIT_LIST_HEAD(&clp->cl_sessions); | |
980 | INIT_LIST_HEAD(&clp->cl_lru); | |
07cd4909 | 981 | clp->cl_time = get_seconds(); |
b09333c4 RL |
982 | clear_bit(0, &clp->cl_cb_slot_busy); |
983 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
984 | copy_verf(clp, verf); | |
985 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
986 | clp->cl_flavor = rqstp->rq_flavor; | |
987 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
988 | gen_confirm(clp); | |
989 | ||
990 | return clp; | |
991 | } | |
992 | ||
35bba9a3 BF |
993 | static int check_name(struct xdr_netobj name) |
994 | { | |
1da177e4 LT |
995 | if (name.len == 0) |
996 | return 0; | |
997 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 998 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
999 | return 0; |
1000 | } | |
1001 | return 1; | |
1002 | } | |
1003 | ||
fd39ca9a | 1004 | static void |
1da177e4 LT |
1005 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1006 | { | |
1007 | unsigned int idhashval; | |
1008 | ||
1009 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1010 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1011 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1012 | renew_client(clp); |
1da177e4 LT |
1013 | } |
1014 | ||
fd39ca9a | 1015 | static void |
1da177e4 LT |
1016 | move_to_confirmed(struct nfs4_client *clp) |
1017 | { | |
1018 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1019 | unsigned int strhashval; | |
1020 | ||
1021 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1022 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1023 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1024 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1025 | renew_client(clp); |
1026 | } | |
1027 | ||
1028 | static struct nfs4_client * | |
1029 | find_confirmed_client(clientid_t *clid) | |
1030 | { | |
1031 | struct nfs4_client *clp; | |
1032 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1033 | ||
1034 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1035 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1036 | return clp; |
1037 | } | |
1038 | return NULL; | |
1039 | } | |
1040 | ||
1041 | static struct nfs4_client * | |
1042 | find_unconfirmed_client(clientid_t *clid) | |
1043 | { | |
1044 | struct nfs4_client *clp; | |
1045 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1046 | ||
1047 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1048 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1049 | return clp; |
1050 | } | |
1051 | return NULL; | |
1052 | } | |
1053 | ||
a1bcecd2 AA |
1054 | /* |
1055 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
1056 | * parameter. Matching is based on the fact the at least one of the | |
1057 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
1058 | * | |
1059 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
1060 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
1061 | * and SET_CLIENTID{,_CONFIRM} | |
1062 | */ | |
1063 | static inline int | |
1064 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
1065 | { | |
1066 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
1067 | return use_exchange_id == has_exchange_flags; | |
1068 | } | |
1069 | ||
28ce6054 | 1070 | static struct nfs4_client * |
a1bcecd2 AA |
1071 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
1072 | bool use_exchange_id) | |
28ce6054 N |
1073 | { |
1074 | struct nfs4_client *clp; | |
1075 | ||
1076 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
1077 | if (same_name(clp->cl_recdir, dname) && |
1078 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
1079 | return clp; |
1080 | } | |
1081 | return NULL; | |
1082 | } | |
1083 | ||
1084 | static struct nfs4_client * | |
a1bcecd2 AA |
1085 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
1086 | bool use_exchange_id) | |
28ce6054 N |
1087 | { |
1088 | struct nfs4_client *clp; | |
1089 | ||
1090 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
1091 | if (same_name(clp->cl_recdir, dname) && |
1092 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
1093 | return clp; |
1094 | } | |
1095 | return NULL; | |
1096 | } | |
1097 | ||
fd39ca9a | 1098 | static void |
fbf4665f | 1099 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 1100 | { |
c237dc03 | 1101 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
1102 | unsigned short expected_family; |
1103 | ||
1104 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1105 | if (se->se_callback_netid_len == 3 && | |
1106 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1107 | expected_family = AF_INET; | |
1108 | else if (se->se_callback_netid_len == 4 && | |
1109 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1110 | expected_family = AF_INET6; | |
1111 | else | |
1da177e4 LT |
1112 | goto out_err; |
1113 | ||
aa9a4ec7 JL |
1114 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
1115 | se->se_callback_addr_len, | |
1116 | (struct sockaddr *) &cb->cb_addr, | |
1117 | sizeof(cb->cb_addr)); | |
1118 | ||
7077ecba | 1119 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 1120 | goto out_err; |
aa9a4ec7 | 1121 | |
fbf4665f JL |
1122 | if (cb->cb_addr.ss_family == AF_INET6) |
1123 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
1124 | ||
ab52ae6d | 1125 | cb->cb_minorversion = 0; |
1da177e4 LT |
1126 | cb->cb_prog = se->se_callback_prog; |
1127 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1128 | return; |
1129 | out_err: | |
aa9a4ec7 JL |
1130 | cb->cb_addr.ss_family = AF_UNSPEC; |
1131 | cb->cb_addrlen = 0; | |
849823c5 | 1132 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1133 | "will not receive delegations\n", |
1134 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1135 | ||
1da177e4 LT |
1136 | return; |
1137 | } | |
1138 | ||
074fe897 | 1139 | /* |
557ce264 | 1140 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1141 | */ |
074fe897 AA |
1142 | void |
1143 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1144 | { |
557ce264 AA |
1145 | struct nfsd4_slot *slot = resp->cstate.slot; |
1146 | unsigned int base; | |
074fe897 | 1147 | |
557ce264 | 1148 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1149 | |
557ce264 AA |
1150 | slot->sl_opcnt = resp->opcnt; |
1151 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1152 | |
bf864a31 | 1153 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1154 | slot->sl_datalen = 0; |
bf864a31 | 1155 | return; |
074fe897 | 1156 | } |
557ce264 AA |
1157 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1158 | base = (char *)resp->cstate.datap - | |
1159 | (char *)resp->xbuf->head[0].iov_base; | |
1160 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1161 | slot->sl_datalen)) | |
1162 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1163 | return; | |
074fe897 AA |
1164 | } |
1165 | ||
1166 | /* | |
abfabf8c AA |
1167 | * Encode the replay sequence operation from the slot values. |
1168 | * If cachethis is FALSE encode the uncached rep error on the next | |
1169 | * operation which sets resp->p and increments resp->opcnt for | |
1170 | * nfs4svc_encode_compoundres. | |
074fe897 | 1171 | * |
074fe897 | 1172 | */ |
abfabf8c AA |
1173 | static __be32 |
1174 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1175 | struct nfsd4_compoundres *resp) | |
074fe897 | 1176 | { |
abfabf8c AA |
1177 | struct nfsd4_op *op; |
1178 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1179 | |
abfabf8c | 1180 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1181 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1182 | |
abfabf8c AA |
1183 | /* Encode the replayed sequence operation */ |
1184 | op = &args->ops[resp->opcnt - 1]; | |
1185 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1186 | |
abfabf8c | 1187 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1188 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1189 | op = &args->ops[resp->opcnt++]; |
1190 | op->status = nfserr_retry_uncached_rep; | |
1191 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1192 | } |
abfabf8c | 1193 | return op->status; |
074fe897 AA |
1194 | } |
1195 | ||
1196 | /* | |
557ce264 AA |
1197 | * The sequence operation is not cached because we can use the slot and |
1198 | * session values. | |
074fe897 AA |
1199 | */ |
1200 | __be32 | |
bf864a31 AA |
1201 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1202 | struct nfsd4_sequence *seq) | |
074fe897 | 1203 | { |
557ce264 | 1204 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1205 | __be32 status; |
1206 | ||
557ce264 | 1207 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1208 | |
abfabf8c AA |
1209 | /* Either returns 0 or nfserr_retry_uncached */ |
1210 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1211 | if (status == nfserr_retry_uncached_rep) | |
1212 | return status; | |
074fe897 | 1213 | |
557ce264 AA |
1214 | /* The sequence operation has been encoded, cstate->datap set. */ |
1215 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1216 | |
557ce264 AA |
1217 | resp->opcnt = slot->sl_opcnt; |
1218 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1219 | status = slot->sl_status; | |
074fe897 AA |
1220 | |
1221 | return status; | |
1222 | } | |
1223 | ||
0733d213 AA |
1224 | /* |
1225 | * Set the exchange_id flags returned by the server. | |
1226 | */ | |
1227 | static void | |
1228 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1229 | { | |
1230 | /* pNFS is not supported */ | |
1231 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1232 | ||
1233 | /* Referrals are supported, Migration is not. */ | |
1234 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1235 | ||
1236 | /* set the wire flags to return to client. */ | |
1237 | clid->flags = new->cl_exchange_flags; | |
1238 | } | |
1239 | ||
069b6ad4 AA |
1240 | __be32 |
1241 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1242 | struct nfsd4_compound_state *cstate, | |
1243 | struct nfsd4_exchange_id *exid) | |
1244 | { | |
0733d213 AA |
1245 | struct nfs4_client *unconf, *conf, *new; |
1246 | int status; | |
1247 | unsigned int strhashval; | |
1248 | char dname[HEXDIR_LEN]; | |
363168b4 | 1249 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1250 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1251 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1252 | |
363168b4 | 1253 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1254 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1255 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1256 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1257 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1258 | |
1259 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1260 | return nfserr_inval; | |
1261 | ||
1262 | /* Currently only support SP4_NONE */ | |
1263 | switch (exid->spa_how) { | |
1264 | case SP4_NONE: | |
1265 | break; | |
1266 | case SP4_SSV: | |
1267 | return nfserr_encr_alg_unsupp; | |
1268 | default: | |
1269 | BUG(); /* checked by xdr code */ | |
1270 | case SP4_MACH_CRED: | |
1271 | return nfserr_serverfault; /* no excuse :-/ */ | |
1272 | } | |
1273 | ||
1274 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1275 | ||
1276 | if (status) | |
1277 | goto error; | |
1278 | ||
1279 | strhashval = clientstr_hashval(dname); | |
1280 | ||
1281 | nfs4_lock_state(); | |
1282 | status = nfs_ok; | |
1283 | ||
a1bcecd2 | 1284 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1285 | if (conf) { |
1286 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1287 | /* 18.35.4 case 8 */ | |
1288 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1289 | status = nfserr_not_same; | |
1290 | goto out; | |
1291 | } | |
1292 | /* Client reboot: destroy old state */ | |
1293 | expire_client(conf); | |
1294 | goto out_new; | |
1295 | } | |
1296 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1297 | /* 18.35.4 case 9 */ | |
1298 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1299 | status = nfserr_perm; | |
1300 | goto out; | |
1301 | } | |
1302 | expire_client(conf); | |
1303 | goto out_new; | |
1304 | } | |
0733d213 AA |
1305 | /* |
1306 | * Set bit when the owner id and verifier map to an already | |
1307 | * confirmed client id (18.35.3). | |
1308 | */ | |
1309 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1310 | ||
1311 | /* | |
1312 | * Falling into 18.35.4 case 2, possible router replay. | |
1313 | * Leave confirmed record intact and return same result. | |
1314 | */ | |
1315 | copy_verf(conf, &verf); | |
1316 | new = conf; | |
1317 | goto out_copy; | |
6ddbbbfe MS |
1318 | } |
1319 | ||
1320 | /* 18.35.4 case 7 */ | |
1321 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1322 | status = nfserr_noent; | |
1323 | goto out; | |
0733d213 AA |
1324 | } |
1325 | ||
a1bcecd2 | 1326 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1327 | if (unconf) { |
1328 | /* | |
1329 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1330 | * a new unconfirmed record should be generated regardless | |
1331 | * of whether any properties have changed. | |
1332 | */ | |
1333 | expire_client(unconf); | |
1334 | } | |
1335 | ||
1336 | out_new: | |
1337 | /* Normal case */ | |
b09333c4 | 1338 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1339 | if (new == NULL) { |
4731030d | 1340 | status = nfserr_jukebox; |
0733d213 AA |
1341 | goto out; |
1342 | } | |
1343 | ||
0733d213 | 1344 | gen_clid(new); |
0733d213 AA |
1345 | add_to_unconfirmed(new, strhashval); |
1346 | out_copy: | |
1347 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1348 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1349 | ||
38eb76a5 | 1350 | exid->seqid = 1; |
0733d213 AA |
1351 | nfsd4_set_ex_flags(new, exid); |
1352 | ||
1353 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1354 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1355 | status = nfs_ok; |
1356 | ||
1357 | out: | |
1358 | nfs4_unlock_state(); | |
1359 | error: | |
1360 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1361 | return status; | |
069b6ad4 AA |
1362 | } |
1363 | ||
b85d4c01 | 1364 | static int |
88e588d5 | 1365 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1366 | { |
88e588d5 AA |
1367 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1368 | slot_seqid); | |
b85d4c01 BH |
1369 | |
1370 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1371 | if (slot_inuse) { |
1372 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1373 | return nfserr_jukebox; |
1374 | else | |
1375 | return nfserr_seq_misordered; | |
1376 | } | |
1377 | /* Normal */ | |
88e588d5 | 1378 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1379 | return nfs_ok; |
1380 | /* Replay */ | |
88e588d5 | 1381 | if (seqid == slot_seqid) |
b85d4c01 BH |
1382 | return nfserr_replay_cache; |
1383 | /* Wraparound */ | |
88e588d5 | 1384 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1385 | return nfs_ok; |
1386 | /* Misordered replay or misordered new request */ | |
1387 | return nfserr_seq_misordered; | |
1388 | } | |
1389 | ||
49557cc7 AA |
1390 | /* |
1391 | * Cache the create session result into the create session single DRC | |
1392 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1393 | * Do this for solo or embedded create session operations. | |
1394 | */ | |
1395 | static void | |
1396 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1397 | struct nfsd4_clid_slot *slot, int nfserr) | |
1398 | { | |
1399 | slot->sl_status = nfserr; | |
1400 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1401 | } | |
1402 | ||
1403 | static __be32 | |
1404 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1405 | struct nfsd4_clid_slot *slot) | |
1406 | { | |
1407 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1408 | return slot->sl_status; | |
1409 | } | |
1410 | ||
069b6ad4 AA |
1411 | __be32 |
1412 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1413 | struct nfsd4_compound_state *cstate, | |
1414 | struct nfsd4_create_session *cr_ses) | |
1415 | { | |
363168b4 | 1416 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1417 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1418 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1419 | int status = 0; |
1420 | ||
1421 | nfs4_lock_state(); | |
1422 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1423 | conf = find_confirmed_client(&cr_ses->clientid); | |
1424 | ||
1425 | if (conf) { | |
49557cc7 AA |
1426 | cs_slot = &conf->cl_cs_slot; |
1427 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1428 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1429 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1430 | cs_slot->sl_seqid); |
38eb76a5 | 1431 | /* Return the cached reply status */ |
49557cc7 | 1432 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1433 | goto out; |
49557cc7 | 1434 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1435 | status = nfserr_seq_misordered; |
1436 | dprintk("Sequence misordered!\n"); | |
1437 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1438 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1439 | goto out; |
1440 | } | |
49557cc7 | 1441 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1442 | } else if (unconf) { |
1443 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1444 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1445 | status = nfserr_clid_inuse; |
1446 | goto out; | |
1447 | } | |
1448 | ||
49557cc7 AA |
1449 | cs_slot = &unconf->cl_cs_slot; |
1450 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1451 | if (status) { |
1452 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1453 | status = nfserr_seq_misordered; |
49557cc7 | 1454 | goto out_cache; |
ec6b5d7b AA |
1455 | } |
1456 | ||
49557cc7 | 1457 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1458 | move_to_confirmed(unconf); |
1459 | ||
38524ab3 | 1460 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
2bf23875 BF |
1461 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
1462 | svc_xprt_get(rqstp->rq_xprt); | |
38524ab3 AA |
1463 | rpc_copy_addr( |
1464 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1465 | sa); | |
1466 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1467 | unconf->cl_cb_conn.cb_minorversion = | |
1468 | cstate->minorversion; | |
1469 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1470 | unconf->cl_cb_seq_nr = 1; |
4b21d0de | 1471 | nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); |
38524ab3 | 1472 | } |
ec6b5d7b AA |
1473 | conf = unconf; |
1474 | } else { | |
1475 | status = nfserr_stale_clientid; | |
1476 | goto out; | |
1477 | } | |
1478 | ||
408b79bc BF |
1479 | /* |
1480 | * We do not support RDMA or persistent sessions | |
1481 | */ | |
1482 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1483 | cr_ses->flags &= ~SESSION4_RDMA; | |
1484 | ||
ec6b5d7b AA |
1485 | status = alloc_init_session(rqstp, conf, cr_ses); |
1486 | if (status) | |
1487 | goto out; | |
1488 | ||
ec6b5d7b AA |
1489 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1490 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1491 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1492 | |
49557cc7 AA |
1493 | out_cache: |
1494 | /* cache solo and embedded create sessions under the state lock */ | |
1495 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1496 | out: |
1497 | nfs4_unlock_state(); | |
1498 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1499 | return status; | |
069b6ad4 AA |
1500 | } |
1501 | ||
57716355 BF |
1502 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1503 | { | |
1504 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1505 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1506 | ||
1507 | return argp->opcnt == resp->opcnt; | |
1508 | } | |
1509 | ||
5d4cec2f BF |
1510 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1511 | { | |
1512 | if (!session) | |
1513 | return 0; | |
1514 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1515 | } | |
1516 | ||
069b6ad4 AA |
1517 | __be32 |
1518 | nfsd4_destroy_session(struct svc_rqst *r, | |
1519 | struct nfsd4_compound_state *cstate, | |
1520 | struct nfsd4_destroy_session *sessionid) | |
1521 | { | |
e10e0cfc BH |
1522 | struct nfsd4_session *ses; |
1523 | u32 status = nfserr_badsession; | |
1524 | ||
1525 | /* Notes: | |
1526 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1527 | * - Should we return nfserr_back_chan_busy if waiting for | |
1528 | * callbacks on to-be-destroyed session? | |
1529 | * - Do we need to clear any callback info from previous session? | |
1530 | */ | |
1531 | ||
5d4cec2f | 1532 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1533 | if (!nfsd4_last_compound_op(r)) |
1534 | return nfserr_not_only_op; | |
1535 | } | |
e10e0cfc | 1536 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1537 | spin_lock(&client_lock); |
e10e0cfc BH |
1538 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1539 | if (!ses) { | |
9089f1b4 | 1540 | spin_unlock(&client_lock); |
e10e0cfc BH |
1541 | goto out; |
1542 | } | |
1543 | ||
1544 | unhash_session(ses); | |
9089f1b4 | 1545 | spin_unlock(&client_lock); |
e10e0cfc | 1546 | |
ab707e15 | 1547 | nfs4_lock_state(); |
e10e0cfc | 1548 | /* wait for callbacks */ |
b5a1a81e | 1549 | nfsd4_set_callback_client(ses->se_client, NULL); |
ab707e15 | 1550 | nfs4_unlock_state(); |
e10e0cfc BH |
1551 | nfsd4_put_session(ses); |
1552 | status = nfs_ok; | |
1553 | out: | |
1554 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1555 | return status; | |
069b6ad4 AA |
1556 | } |
1557 | ||
1558 | __be32 | |
b85d4c01 | 1559 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1560 | struct nfsd4_compound_state *cstate, |
1561 | struct nfsd4_sequence *seq) | |
1562 | { | |
f9bb94c4 | 1563 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1564 | struct nfsd4_session *session; |
1565 | struct nfsd4_slot *slot; | |
1566 | int status; | |
1567 | ||
f9bb94c4 AA |
1568 | if (resp->opcnt != 1) |
1569 | return nfserr_sequence_pos; | |
1570 | ||
9089f1b4 | 1571 | spin_lock(&client_lock); |
b85d4c01 BH |
1572 | status = nfserr_badsession; |
1573 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1574 | if (!session) | |
1575 | goto out; | |
1576 | ||
1577 | status = nfserr_badslot; | |
6c18ba9f | 1578 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1579 | goto out; |
1580 | ||
557ce264 | 1581 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1582 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1583 | ||
a8dfdaeb AA |
1584 | /* We do not negotiate the number of slots yet, so set the |
1585 | * maxslots to the session maxreqs which is used to encode | |
1586 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1587 | seq->maxslots = session->se_fchannel.maxreqs; | |
1588 | ||
88e588d5 | 1589 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1590 | if (status == nfserr_replay_cache) { |
1591 | cstate->slot = slot; | |
1592 | cstate->session = session; | |
da3846a2 | 1593 | /* Return the cached reply status and set cstate->status |
557ce264 | 1594 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1595 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1596 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1597 | goto out; |
b85d4c01 BH |
1598 | } |
1599 | if (status) | |
1600 | goto out; | |
1601 | ||
1602 | /* Success! bump slot seqid */ | |
1603 | slot->sl_inuse = true; | |
1604 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1605 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1606 | |
1607 | cstate->slot = slot; | |
1608 | cstate->session = session; | |
1609 | ||
b85d4c01 | 1610 | out: |
26c0c75e | 1611 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1612 | if (cstate->session) { |
36acb66b | 1613 | nfsd4_get_session(cstate->session); |
d7682988 | 1614 | atomic_inc(&session->se_client->cl_refcount); |
aaf84eb9 | 1615 | } |
36acb66b | 1616 | spin_unlock(&client_lock); |
b85d4c01 BH |
1617 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1618 | return status; | |
069b6ad4 AA |
1619 | } |
1620 | ||
4dc6ec00 BF |
1621 | __be32 |
1622 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1623 | { | |
1624 | if (rc->rca_one_fs) { | |
1625 | if (!cstate->current_fh.fh_dentry) | |
1626 | return nfserr_nofilehandle; | |
1627 | /* | |
1628 | * We don't take advantage of the rca_one_fs case. | |
1629 | * That's OK, it's optional, we can safely ignore it. | |
1630 | */ | |
1631 | return nfs_ok; | |
1632 | } | |
1633 | nfs4_lock_state(); | |
1634 | if (is_client_expired(cstate->session->se_client)) { | |
1635 | nfs4_unlock_state(); | |
1636 | /* | |
1637 | * The following error isn't really legal. | |
1638 | * But we only get here if the client just explicitly | |
1639 | * destroyed the client. Surely it no longer cares what | |
1640 | * error it gets back on an operation for the dead | |
1641 | * client. | |
1642 | */ | |
1643 | return nfserr_stale_clientid; | |
1644 | } | |
1645 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1646 | nfs4_unlock_state(); | |
1647 | return nfs_ok; | |
1648 | } | |
1649 | ||
b37ad28b | 1650 | __be32 |
b591480b BF |
1651 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1652 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1653 | { |
363168b4 | 1654 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1655 | struct xdr_netobj clname = { |
1656 | .len = setclid->se_namelen, | |
1657 | .data = setclid->se_name, | |
1658 | }; | |
1659 | nfs4_verifier clverifier = setclid->se_verf; | |
1660 | unsigned int strhashval; | |
28ce6054 | 1661 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1662 | __be32 status; |
a55370a3 | 1663 | char dname[HEXDIR_LEN]; |
1da177e4 | 1664 | |
1da177e4 | 1665 | if (!check_name(clname)) |
73aea4ec | 1666 | return nfserr_inval; |
1da177e4 | 1667 | |
a55370a3 N |
1668 | status = nfs4_make_rec_clidname(dname, &clname); |
1669 | if (status) | |
73aea4ec | 1670 | return status; |
a55370a3 | 1671 | |
1da177e4 LT |
1672 | /* |
1673 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1674 | * We get here on a DRC miss. | |
1675 | */ | |
1676 | ||
a55370a3 | 1677 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1678 | |
1da177e4 | 1679 | nfs4_lock_state(); |
a1bcecd2 | 1680 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1681 | if (conf) { |
a186e767 | 1682 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1683 | status = nfserr_clid_inuse; |
026722c2 | 1684 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1685 | char addr_str[INET6_ADDRSTRLEN]; |
1686 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1687 | sizeof(addr_str)); | |
1688 | dprintk("NFSD: setclientid: string in use by client " | |
1689 | "at %s\n", addr_str); | |
1da177e4 LT |
1690 | goto out; |
1691 | } | |
1da177e4 | 1692 | } |
a186e767 BF |
1693 | /* |
1694 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1695 | * has a description of SETCLIENTID request processing consisting | |
1696 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1697 | */ | |
a1bcecd2 | 1698 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1699 | status = nfserr_resource; |
1700 | if (!conf) { | |
a186e767 BF |
1701 | /* |
1702 | * RFC 3530 14.2.33 CASE 4: | |
1703 | * placed first, because it is the normal case | |
1da177e4 LT |
1704 | */ |
1705 | if (unconf) | |
1706 | expire_client(unconf); | |
b09333c4 | 1707 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1708 | if (new == NULL) |
1da177e4 | 1709 | goto out; |
1da177e4 | 1710 | gen_clid(new); |
599e0a22 | 1711 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1712 | /* |
a186e767 BF |
1713 | * RFC 3530 14.2.33 CASE 1: |
1714 | * probable callback update | |
1da177e4 | 1715 | */ |
31f4a6c1 N |
1716 | if (unconf) { |
1717 | /* Note this is removing unconfirmed {*x***}, | |
1718 | * which is stronger than RFC recommended {vxc**}. | |
1719 | * This has the advantage that there is at most | |
1720 | * one {*x***} in either list at any time. | |
1721 | */ | |
1722 | expire_client(unconf); | |
1da177e4 | 1723 | } |
b09333c4 | 1724 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1725 | if (new == NULL) |
1da177e4 | 1726 | goto out; |
1da177e4 | 1727 | copy_clid(new, conf); |
1da177e4 LT |
1728 | } else if (!unconf) { |
1729 | /* | |
a186e767 BF |
1730 | * RFC 3530 14.2.33 CASE 2: |
1731 | * probable client reboot; state will be removed if | |
1732 | * confirmed. | |
1da177e4 | 1733 | */ |
b09333c4 | 1734 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1735 | if (new == NULL) |
1da177e4 | 1736 | goto out; |
1da177e4 | 1737 | gen_clid(new); |
49ba8781 | 1738 | } else { |
a186e767 BF |
1739 | /* |
1740 | * RFC 3530 14.2.33 CASE 3: | |
1741 | * probable client reboot; state will be removed if | |
1742 | * confirmed. | |
1da177e4 LT |
1743 | */ |
1744 | expire_client(unconf); | |
b09333c4 | 1745 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1746 | if (new == NULL) |
1da177e4 | 1747 | goto out; |
1da177e4 | 1748 | gen_clid(new); |
1da177e4 | 1749 | } |
fbf4665f | 1750 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1751 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1752 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1753 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1754 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1755 | status = nfs_ok; | |
1756 | out: | |
1757 | nfs4_unlock_state(); | |
1758 | return status; | |
1759 | } | |
1760 | ||
1761 | ||
1762 | /* | |
a186e767 BF |
1763 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1764 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1765 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1766 | */ |
b37ad28b | 1767 | __be32 |
b591480b BF |
1768 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1769 | struct nfsd4_compound_state *cstate, | |
1770 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1771 | { |
363168b4 | 1772 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1773 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1774 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1775 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1776 | __be32 status; |
1da177e4 LT |
1777 | |
1778 | if (STALE_CLIENTID(clid)) | |
1779 | return nfserr_stale_clientid; | |
1780 | /* | |
1781 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1782 | * We get here on a DRC miss. | |
1783 | */ | |
1784 | ||
1785 | nfs4_lock_state(); | |
21ab45a4 N |
1786 | |
1787 | conf = find_confirmed_client(clid); | |
1788 | unconf = find_unconfirmed_client(clid); | |
1789 | ||
1790 | status = nfserr_clid_inuse; | |
363168b4 | 1791 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1792 | goto out; |
363168b4 | 1793 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1794 | goto out; |
1795 | ||
a186e767 BF |
1796 | /* |
1797 | * section 14.2.34 of RFC 3530 has a description of | |
1798 | * SETCLIENTID_CONFIRM request processing consisting | |
1799 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1800 | */ | |
366e0c1d | 1801 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1802 | /* |
1803 | * RFC 3530 14.2.34 CASE 1: | |
1804 | * callback update | |
1805 | */ | |
599e0a22 | 1806 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1807 | status = nfserr_clid_inuse; |
1808 | else { | |
2bf23875 | 1809 | atomic_set(&conf->cl_cb_set, 0); |
4b21d0de | 1810 | nfsd4_probe_callback(conf, &unconf->cl_cb_conn); |
1a69c179 | 1811 | expire_client(unconf); |
1da177e4 | 1812 | status = nfs_ok; |
1a69c179 | 1813 | |
1da177e4 | 1814 | } |
f3aba4e5 | 1815 | } else if (conf && !unconf) { |
a186e767 BF |
1816 | /* |
1817 | * RFC 3530 14.2.34 CASE 2: | |
1818 | * probable retransmitted request; play it safe and | |
1819 | * do nothing. | |
7c79f737 | 1820 | */ |
599e0a22 | 1821 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1822 | status = nfserr_clid_inuse; |
21ab45a4 | 1823 | else |
1da177e4 | 1824 | status = nfs_ok; |
7c79f737 | 1825 | } else if (!conf && unconf |
599e0a22 | 1826 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1827 | /* |
1828 | * RFC 3530 14.2.34 CASE 3: | |
1829 | * Normal case; new or rebooted client: | |
7c79f737 | 1830 | */ |
599e0a22 | 1831 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1832 | status = nfserr_clid_inuse; |
1833 | } else { | |
1a69c179 N |
1834 | unsigned int hash = |
1835 | clientstr_hashval(unconf->cl_recdir); | |
1836 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1837 | hash, false); |
1a69c179 | 1838 | if (conf) { |
c7b9a459 | 1839 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1840 | expire_client(conf); |
1841 | } | |
1da177e4 | 1842 | move_to_confirmed(unconf); |
21ab45a4 | 1843 | conf = unconf; |
4b21d0de | 1844 | nfsd4_probe_callback(conf, &conf->cl_cb_conn); |
1a69c179 | 1845 | status = nfs_ok; |
1da177e4 | 1846 | } |
599e0a22 BF |
1847 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1848 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1849 | &confirm)))) { |
a186e767 BF |
1850 | /* |
1851 | * RFC 3530 14.2.34 CASE 4: | |
1852 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1853 | */ |
1da177e4 | 1854 | status = nfserr_stale_clientid; |
7c79f737 | 1855 | } else { |
08e8987c N |
1856 | /* check that we have hit one of the cases...*/ |
1857 | status = nfserr_clid_inuse; | |
1858 | } | |
1da177e4 | 1859 | out: |
1da177e4 LT |
1860 | nfs4_unlock_state(); |
1861 | return status; | |
1862 | } | |
1863 | ||
1da177e4 LT |
1864 | /* OPEN Share state helper functions */ |
1865 | static inline struct nfs4_file * | |
1866 | alloc_init_file(struct inode *ino) | |
1867 | { | |
1868 | struct nfs4_file *fp; | |
1869 | unsigned int hashval = file_hashval(ino); | |
1870 | ||
e60d4398 N |
1871 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1872 | if (fp) { | |
8b671b80 | 1873 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1874 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1875 | INIT_LIST_HEAD(&fp->fi_stateids); |
1876 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1877 | fp->fi_inode = igrab(ino); |
1878 | fp->fi_id = current_fileid++; | |
47f9940c | 1879 | fp->fi_had_conflict = false; |
f9d7562f BF |
1880 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
1881 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
1882 | spin_lock(&recall_lock); |
1883 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
1884 | spin_unlock(&recall_lock); | |
1da177e4 LT |
1885 | return fp; |
1886 | } | |
1887 | return NULL; | |
1888 | } | |
1889 | ||
e60d4398 | 1890 | static void |
e18b890b | 1891 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1892 | { |
e60d4398 N |
1893 | if (*slab == NULL) |
1894 | return; | |
1a1d92c1 | 1895 | kmem_cache_destroy(*slab); |
e60d4398 | 1896 | *slab = NULL; |
1da177e4 LT |
1897 | } |
1898 | ||
e8ff2a84 | 1899 | void |
1da177e4 LT |
1900 | nfsd4_free_slabs(void) |
1901 | { | |
e60d4398 N |
1902 | nfsd4_free_slab(&stateowner_slab); |
1903 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1904 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1905 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1906 | } |
1da177e4 | 1907 | |
e60d4398 N |
1908 | static int |
1909 | nfsd4_init_slabs(void) | |
1910 | { | |
1911 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1912 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1913 | if (stateowner_slab == NULL) |
1914 | goto out_nomem; | |
1915 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1916 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1917 | if (file_slab == NULL) |
1918 | goto out_nomem; | |
5ac049ac | 1919 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1920 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1921 | if (stateid_slab == NULL) |
1922 | goto out_nomem; | |
5b2d21c1 | 1923 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1924 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1925 | if (deleg_slab == NULL) |
1926 | goto out_nomem; | |
e60d4398 N |
1927 | return 0; |
1928 | out_nomem: | |
1929 | nfsd4_free_slabs(); | |
1930 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1931 | return -ENOMEM; | |
1da177e4 LT |
1932 | } |
1933 | ||
1934 | void | |
1935 | nfs4_free_stateowner(struct kref *kref) | |
1936 | { | |
1937 | struct nfs4_stateowner *sop = | |
1938 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1939 | kfree(sop->so_owner.data); | |
1940 | kmem_cache_free(stateowner_slab, sop); | |
1941 | } | |
1942 | ||
1943 | static inline struct nfs4_stateowner * | |
1944 | alloc_stateowner(struct xdr_netobj *owner) | |
1945 | { | |
1946 | struct nfs4_stateowner *sop; | |
1947 | ||
1948 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1949 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1950 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1951 | sop->so_owner.len = owner->len; | |
1952 | kref_init(&sop->so_ref); | |
1953 | return sop; | |
1954 | } | |
1955 | kmem_cache_free(stateowner_slab, sop); | |
1956 | } | |
1957 | return NULL; | |
1958 | } | |
1959 | ||
1960 | static struct nfs4_stateowner * | |
1961 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1962 | struct nfs4_stateowner *sop; | |
1963 | struct nfs4_replay *rp; | |
1964 | unsigned int idhashval; | |
1965 | ||
1966 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1967 | return NULL; | |
1968 | idhashval = ownerid_hashval(current_ownerid); | |
1969 | INIT_LIST_HEAD(&sop->so_idhash); | |
1970 | INIT_LIST_HEAD(&sop->so_strhash); | |
1971 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1972 | INIT_LIST_HEAD(&sop->so_stateids); |
1973 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1974 | INIT_LIST_HEAD(&sop->so_close_lru); |
1975 | sop->so_time = 0; | |
1976 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1977 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1978 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1979 | sop->so_is_open_owner = 1; |
1980 | sop->so_id = current_ownerid++; | |
1981 | sop->so_client = clp; | |
1982 | sop->so_seqid = open->op_seqid; | |
1983 | sop->so_confirmed = 0; | |
1984 | rp = &sop->so_replay; | |
de1ae286 | 1985 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1986 | rp->rp_buflen = 0; |
1987 | rp->rp_buf = rp->rp_ibuf; | |
1988 | return sop; | |
1989 | } | |
1990 | ||
1da177e4 LT |
1991 | static inline void |
1992 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1993 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1994 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1995 | ||
1996 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1997 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1998 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1999 | INIT_LIST_HEAD(&stp->st_perfile); |
2000 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2001 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2002 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2003 | stp->st_stateowner = sop; |
13cd2184 | 2004 | get_nfs4_file(fp); |
1da177e4 | 2005 | stp->st_file = fp; |
e4e83ea4 | 2006 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2007 | stp->st_stateid.si_stateownerid = sop->so_id; |
2008 | stp->st_stateid.si_fileid = fp->fi_id; | |
2009 | stp->st_stateid.si_generation = 0; | |
2010 | stp->st_access_bmap = 0; | |
2011 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2012 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2013 | &stp->st_access_bmap); | |
1da177e4 | 2014 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2015 | stp->st_openstp = NULL; |
1da177e4 LT |
2016 | } |
2017 | ||
fd39ca9a | 2018 | static void |
1da177e4 LT |
2019 | move_to_close_lru(struct nfs4_stateowner *sop) |
2020 | { | |
2021 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2022 | ||
358dd55a | 2023 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2024 | sop->so_time = get_seconds(); |
2025 | } | |
2026 | ||
1da177e4 | 2027 | static int |
599e0a22 BF |
2028 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2029 | clientid_t *clid) | |
2030 | { | |
2031 | return (sop->so_owner.len == owner->len) && | |
2032 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2033 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2034 | } |
2035 | ||
2036 | static struct nfs4_stateowner * | |
2037 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2038 | { | |
2039 | struct nfs4_stateowner *so = NULL; | |
2040 | ||
2041 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2042 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2043 | return so; |
2044 | } | |
2045 | return NULL; | |
2046 | } | |
2047 | ||
2048 | /* search file_hashtbl[] for file */ | |
2049 | static struct nfs4_file * | |
2050 | find_file(struct inode *ino) | |
2051 | { | |
2052 | unsigned int hashval = file_hashval(ino); | |
2053 | struct nfs4_file *fp; | |
2054 | ||
8b671b80 | 2055 | spin_lock(&recall_lock); |
1da177e4 | 2056 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2057 | if (fp->fi_inode == ino) { |
2058 | get_nfs4_file(fp); | |
8b671b80 | 2059 | spin_unlock(&recall_lock); |
1da177e4 | 2060 | return fp; |
13cd2184 | 2061 | } |
1da177e4 | 2062 | } |
8b671b80 | 2063 | spin_unlock(&recall_lock); |
1da177e4 LT |
2064 | return NULL; |
2065 | } | |
2066 | ||
d87a8ade | 2067 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2068 | { |
d87a8ade | 2069 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2070 | return 0; |
d87a8ade AA |
2071 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2072 | return 0; | |
2073 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2074 | if (minorversion && x) { | |
2075 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2076 | return 0; | |
2077 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2078 | return 0; | |
2079 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2080 | } | |
2081 | if (x) | |
8838dc43 BF |
2082 | return 0; |
2083 | return 1; | |
ba5a6a19 BF |
2084 | } |
2085 | ||
8838dc43 | 2086 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2087 | { |
8838dc43 BF |
2088 | /* Note: unlike access bits, deny bits may be zero. */ |
2089 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2090 | } |
1da177e4 | 2091 | |
1da177e4 LT |
2092 | /* |
2093 | * Called to check deny when READ with all zero stateid or | |
2094 | * WRITE with all zero or all one stateid | |
2095 | */ | |
b37ad28b | 2096 | static __be32 |
1da177e4 LT |
2097 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2098 | { | |
2099 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2100 | struct nfs4_file *fp; | |
2101 | struct nfs4_stateid *stp; | |
b37ad28b | 2102 | __be32 ret; |
1da177e4 LT |
2103 | |
2104 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2105 | ||
2106 | fp = find_file(ino); | |
13cd2184 N |
2107 | if (!fp) |
2108 | return nfs_ok; | |
b700949b | 2109 | ret = nfserr_locked; |
1da177e4 | 2110 | /* Search for conflicting share reservations */ |
13cd2184 N |
2111 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2112 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2113 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2114 | goto out; | |
1da177e4 | 2115 | } |
13cd2184 N |
2116 | ret = nfs_ok; |
2117 | out: | |
2118 | put_nfs4_file(fp); | |
2119 | return ret; | |
1da177e4 LT |
2120 | } |
2121 | ||
2122 | static inline void | |
f9d7562f | 2123 | nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) |
1da177e4 | 2124 | { |
f9d7562f BF |
2125 | if (share_access & NFS4_SHARE_ACCESS_WRITE) |
2126 | nfs4_file_put_access(fp, O_WRONLY); | |
2127 | if (share_access & NFS4_SHARE_ACCESS_READ) | |
2128 | nfs4_file_put_access(fp, O_RDONLY); | |
1da177e4 LT |
2129 | } |
2130 | ||
1da177e4 LT |
2131 | /* |
2132 | * Spawn a thread to perform a recall on the delegation represented | |
2133 | * by the lease (file_lock) | |
2134 | * | |
2135 | * Called from break_lease() with lock_kernel() held. | |
2136 | * Note: we assume break_lease will only call this *once* for any given | |
2137 | * lease. | |
2138 | */ | |
2139 | static | |
2140 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2141 | { | |
63e4863f | 2142 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2143 | |
2144 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2145 | if (!dp) | |
2146 | return; | |
2147 | ||
2148 | /* We're assuming the state code never drops its reference | |
2149 | * without first removing the lease. Since we're in this lease | |
2150 | * callback (and since the lease code is serialized by the kernel | |
2151 | * lock) we know the server hasn't removed the lease yet, we know | |
2152 | * it's safe to take a reference: */ | |
2153 | atomic_inc(&dp->dl_count); | |
2154 | ||
2155 | spin_lock(&recall_lock); | |
2156 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2157 | spin_unlock(&recall_lock); | |
2158 | ||
2159 | /* only place dl_time is set. protected by lock_kernel*/ | |
2160 | dp->dl_time = get_seconds(); | |
2161 | ||
0272e1fd BF |
2162 | /* |
2163 | * We don't want the locks code to timeout the lease for us; | |
2164 | * we'll remove it ourself if the delegation isn't returned | |
2165 | * in time. | |
2166 | */ | |
2167 | fl->fl_break_time = 0; | |
1da177e4 | 2168 | |
63e4863f BF |
2169 | dp->dl_file->fi_had_conflict = true; |
2170 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2171 | } |
2172 | ||
2173 | /* | |
2174 | * The file_lock is being reapd. | |
2175 | * | |
2176 | * Called by locks_free_lock() with lock_kernel() held. | |
2177 | */ | |
2178 | static | |
2179 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2180 | { | |
2181 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2182 | ||
2183 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2184 | ||
2185 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2186 | return; | |
2187 | dp->dl_flock = NULL; | |
2188 | } | |
2189 | ||
2190 | /* | |
2191 | * Set the delegation file_lock back pointer. | |
2192 | * | |
a9933cea | 2193 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2194 | */ |
2195 | static | |
2196 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2197 | { | |
2198 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2199 | ||
2200 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2201 | if (!dp) | |
2202 | return; | |
2203 | dp->dl_flock = new; | |
2204 | } | |
2205 | ||
2206 | /* | |
a9933cea | 2207 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2208 | */ |
2209 | static | |
2210 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2211 | { | |
2212 | struct nfs4_delegation *onlistd = | |
2213 | (struct nfs4_delegation *)onlist->fl_owner; | |
2214 | struct nfs4_delegation *tryd = | |
2215 | (struct nfs4_delegation *)try->fl_owner; | |
2216 | ||
2217 | if (onlist->fl_lmops != try->fl_lmops) | |
2218 | return 0; | |
2219 | ||
2220 | return onlistd->dl_client == tryd->dl_client; | |
2221 | } | |
2222 | ||
2223 | ||
2224 | static | |
2225 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2226 | { | |
2227 | if (arg & F_UNLCK) | |
2228 | return lease_modify(onlist, arg); | |
2229 | else | |
2230 | return -EAGAIN; | |
2231 | } | |
2232 | ||
7b021967 | 2233 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2234 | .fl_break = nfsd_break_deleg_cb, |
2235 | .fl_release_private = nfsd_release_deleg_cb, | |
2236 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2237 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2238 | .fl_change = nfsd_change_deleg_cb, | |
2239 | }; | |
2240 | ||
2241 | ||
b37ad28b | 2242 | __be32 |
6668958f AA |
2243 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2244 | struct nfsd4_open *open) | |
1da177e4 | 2245 | { |
1da177e4 LT |
2246 | clientid_t *clientid = &open->op_clientid; |
2247 | struct nfs4_client *clp = NULL; | |
2248 | unsigned int strhashval; | |
2249 | struct nfs4_stateowner *sop = NULL; | |
2250 | ||
1da177e4 | 2251 | if (!check_name(open->op_owner)) |
0f442aa2 | 2252 | return nfserr_inval; |
1da177e4 LT |
2253 | |
2254 | if (STALE_CLIENTID(&open->op_clientid)) | |
2255 | return nfserr_stale_clientid; | |
2256 | ||
2257 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2258 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2259 | open->op_stateowner = sop; |
2260 | if (!sop) { | |
2261 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2262 | clp = find_confirmed_client(clientid); |
2263 | if (clp == NULL) | |
0f442aa2 BF |
2264 | return nfserr_expired; |
2265 | goto renew; | |
1da177e4 | 2266 | } |
6668958f AA |
2267 | /* When sessions are used, skip open sequenceid processing */ |
2268 | if (nfsd4_has_session(cstate)) | |
2269 | goto renew; | |
0f442aa2 BF |
2270 | if (!sop->so_confirmed) { |
2271 | /* Replace unconfirmed owners without checking for replay. */ | |
2272 | clp = sop->so_client; | |
f044ff83 | 2273 | release_openowner(sop); |
0f442aa2 BF |
2274 | open->op_stateowner = NULL; |
2275 | goto renew; | |
2276 | } | |
2277 | if (open->op_seqid == sop->so_seqid - 1) { | |
2278 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2279 | return nfserr_replay_me; |
0f442aa2 BF |
2280 | /* The original OPEN failed so spectacularly |
2281 | * that we don't even have replay data saved! | |
2282 | * Therefore, we have no choice but to continue | |
2283 | * processing this OPEN; presumably, we'll | |
2284 | * fail again for the same reason. | |
2285 | */ | |
2286 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2287 | goto renew; | |
2288 | } | |
2289 | if (open->op_seqid != sop->so_seqid) | |
2290 | return nfserr_bad_seqid; | |
1da177e4 | 2291 | renew: |
0f442aa2 BF |
2292 | if (open->op_stateowner == NULL) { |
2293 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2294 | if (sop == NULL) | |
2295 | return nfserr_resource; | |
2296 | open->op_stateowner = sop; | |
2297 | } | |
2298 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2299 | renew_client(sop->so_client); |
0f442aa2 | 2300 | return nfs_ok; |
1da177e4 LT |
2301 | } |
2302 | ||
b37ad28b | 2303 | static inline __be32 |
4a6e43e6 N |
2304 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2305 | { | |
2306 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2307 | return nfserr_openmode; | |
2308 | else | |
2309 | return nfs_ok; | |
2310 | } | |
2311 | ||
52f4fb43 N |
2312 | static struct nfs4_delegation * |
2313 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2314 | { | |
2315 | struct nfs4_delegation *dp; | |
2316 | ||
ea1da636 | 2317 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2318 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2319 | return dp; | |
2320 | } | |
2321 | return NULL; | |
2322 | } | |
2323 | ||
24a0111e BF |
2324 | int share_access_to_flags(u32 share_access) |
2325 | { | |
2326 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2327 | ||
2328 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2329 | } | |
2330 | ||
b37ad28b | 2331 | static __be32 |
567d9829 N |
2332 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2333 | struct nfs4_delegation **dp) | |
2334 | { | |
2335 | int flags; | |
b37ad28b | 2336 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2337 | |
2338 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2339 | if (*dp == NULL) | |
c44c5eeb | 2340 | goto out; |
24a0111e | 2341 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2342 | status = nfs4_check_delegmode(*dp, flags); |
2343 | if (status) | |
2344 | *dp = NULL; | |
c44c5eeb N |
2345 | out: |
2346 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2347 | return nfs_ok; | |
2348 | if (status) | |
2349 | return status; | |
2350 | open->op_stateowner->so_confirmed = 1; | |
2351 | return nfs_ok; | |
567d9829 N |
2352 | } |
2353 | ||
b37ad28b | 2354 | static __be32 |
1da177e4 LT |
2355 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2356 | { | |
2357 | struct nfs4_stateid *local; | |
b37ad28b | 2358 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2359 | struct nfs4_stateowner *sop = open->op_stateowner; |
2360 | ||
8beefa24 | 2361 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2362 | /* ignore lock owners */ |
2363 | if (local->st_stateowner->so_is_open_owner == 0) | |
2364 | continue; | |
2365 | /* remember if we have seen this open owner */ | |
2366 | if (local->st_stateowner == sop) | |
2367 | *stpp = local; | |
2368 | /* check for conflicting share reservations */ | |
2369 | if (!test_share(local, open)) | |
2370 | goto out; | |
2371 | } | |
2372 | status = 0; | |
2373 | out: | |
2374 | return status; | |
2375 | } | |
2376 | ||
5ac049ac N |
2377 | static inline struct nfs4_stateid * |
2378 | nfs4_alloc_stateid(void) | |
2379 | { | |
2380 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2381 | } | |
2382 | ||
21fb4016 BF |
2383 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2384 | { | |
2385 | int flags = 0; | |
2386 | ||
2387 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2388 | flags |= NFSD_MAY_READ; | |
2389 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2390 | flags |= NFSD_MAY_WRITE; | |
2391 | return flags; | |
2392 | } | |
2393 | ||
f9d7562f BF |
2394 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file |
2395 | *fp, struct svc_fh *cur_fh, u32 nfs4_access) | |
2396 | { | |
2397 | __be32 status; | |
2398 | int oflag = nfs4_access_to_omode(nfs4_access); | |
2399 | int access = nfs4_access_to_access(nfs4_access); | |
2400 | ||
2401 | if (!fp->fi_fds[oflag]) { | |
2402 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2403 | &fp->fi_fds[oflag]); | |
2404 | if (status == nfserr_dropit) | |
2405 | status = nfserr_jukebox; | |
2406 | if (status) | |
2407 | return status; | |
2408 | } | |
2409 | nfs4_file_get_access(fp, oflag); | |
2410 | ||
2411 | return nfs_ok; | |
2412 | } | |
2413 | ||
b37ad28b | 2414 | static __be32 |
1da177e4 | 2415 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2416 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2417 | struct nfsd4_open *open) | |
1da177e4 LT |
2418 | { |
2419 | struct nfs4_stateid *stp; | |
f9d7562f | 2420 | __be32 status; |
1da177e4 | 2421 | |
5ac049ac | 2422 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2423 | if (stp == NULL) |
2424 | return nfserr_resource; | |
2425 | ||
f9d7562f BF |
2426 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); |
2427 | if (status) { | |
2428 | kmem_cache_free(stateid_slab, stp); | |
2429 | return status; | |
1da177e4 | 2430 | } |
1da177e4 LT |
2431 | *stpp = stp; |
2432 | return 0; | |
2433 | } | |
2434 | ||
b37ad28b | 2435 | static inline __be32 |
1da177e4 LT |
2436 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2437 | struct nfsd4_open *open) | |
2438 | { | |
2439 | struct iattr iattr = { | |
2440 | .ia_valid = ATTR_SIZE, | |
2441 | .ia_size = 0, | |
2442 | }; | |
2443 | if (!open->op_truncate) | |
2444 | return 0; | |
2445 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2446 | return nfserr_inval; |
1da177e4 LT |
2447 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2448 | } | |
2449 | ||
b37ad28b | 2450 | static __be32 |
f9d7562f | 2451 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2452 | { |
7d947842 BF |
2453 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2454 | bool new_access; | |
b37ad28b | 2455 | __be32 status; |
1da177e4 | 2456 | |
7d947842 | 2457 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2458 | if (new_access) { |
7d947842 | 2459 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); |
f9d7562f BF |
2460 | if (status) |
2461 | return status; | |
6c26d08f | 2462 | } |
1da177e4 LT |
2463 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2464 | if (status) { | |
f9d7562f BF |
2465 | if (new_access) { |
2466 | int oflag = nfs4_access_to_omode(new_access); | |
2467 | nfs4_file_put_access(fp, oflag); | |
2468 | } | |
1da177e4 LT |
2469 | return status; |
2470 | } | |
2471 | /* remember the open */ | |
24a0111e | 2472 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2473 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2474 | |
2475 | return nfs_ok; | |
2476 | } | |
2477 | ||
2478 | ||
1da177e4 | 2479 | static void |
37515177 | 2480 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2481 | { |
37515177 N |
2482 | open->op_stateowner->so_confirmed = 1; |
2483 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2484 | } |
2485 | ||
2486 | /* | |
2487 | * Attempt to hand out a delegation. | |
2488 | */ | |
2489 | static void | |
2490 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2491 | { | |
2492 | struct nfs4_delegation *dp; | |
2493 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2494 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2495 | struct file_lock fl, *flp = &fl; |
2496 | int status, flag = 0; | |
2497 | ||
2498 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2499 | open->op_recall = 0; |
2500 | switch (open->op_claim_type) { | |
2501 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2502 | if (!cb_up) |
7b190fec N |
2503 | open->op_recall = 1; |
2504 | flag = open->op_delegate_type; | |
2505 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2506 | goto out; | |
2507 | break; | |
2508 | case NFS4_OPEN_CLAIM_NULL: | |
2509 | /* Let's not give out any delegations till everyone's | |
2510 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2511 | if (locks_in_grace()) |
7b190fec | 2512 | goto out; |
2bf23875 | 2513 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2514 | goto out; |
2515 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2516 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2517 | else | |
2518 | flag = NFS4_OPEN_DELEGATE_READ; | |
2519 | break; | |
2520 | default: | |
2521 | goto out; | |
2522 | } | |
1da177e4 LT |
2523 | |
2524 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2525 | if (dp == NULL) { | |
2526 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2527 | goto out; | |
2528 | } | |
2529 | locks_init_lock(&fl); | |
2530 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2531 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2532 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2533 | fl.fl_end = OFFSET_MAX; |
2534 | fl.fl_owner = (fl_owner_t)dp; | |
f9d7562f BF |
2535 | fl.fl_file = find_readable_file(stp->st_file); |
2536 | BUG_ON(!fl.fl_file); | |
1da177e4 LT |
2537 | fl.fl_pid = current->tgid; |
2538 | ||
a9933cea | 2539 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2540 | * the lock_manager callbacks fl_mylease and fl_change are used |
2541 | */ | |
f9d7562f | 2542 | if ((status = vfs_setlease(fl.fl_file, fl.fl_type, &flp))) { |
1da177e4 | 2543 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2544 | unhash_delegation(dp); |
1da177e4 LT |
2545 | flag = NFS4_OPEN_DELEGATE_NONE; |
2546 | goto out; | |
2547 | } | |
2548 | ||
2549 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2550 | ||
8c10cbdb BH |
2551 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2552 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2553 | out: |
7b190fec N |
2554 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2555 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2556 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2557 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2558 | open->op_delegate_type = flag; |
2559 | } | |
2560 | ||
2561 | /* | |
2562 | * called with nfs4_lock_state() held. | |
2563 | */ | |
b37ad28b | 2564 | __be32 |
1da177e4 LT |
2565 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2566 | { | |
6668958f | 2567 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2568 | struct nfs4_file *fp = NULL; |
2569 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2570 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2571 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2572 | __be32 status; |
1da177e4 LT |
2573 | |
2574 | status = nfserr_inval; | |
d87a8ade | 2575 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2576 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2577 | goto out; |
2578 | /* | |
2579 | * Lookup file; if found, lookup stateid and check open request, | |
2580 | * and check for delegations in the process of being recalled. | |
2581 | * If not found, create the nfs4_file struct | |
2582 | */ | |
2583 | fp = find_file(ino); | |
2584 | if (fp) { | |
2585 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2586 | goto out; | |
c44c5eeb N |
2587 | status = nfs4_check_deleg(fp, open, &dp); |
2588 | if (status) | |
2589 | goto out; | |
1da177e4 | 2590 | } else { |
c44c5eeb N |
2591 | status = nfserr_bad_stateid; |
2592 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2593 | goto out; | |
1da177e4 LT |
2594 | status = nfserr_resource; |
2595 | fp = alloc_init_file(ino); | |
2596 | if (fp == NULL) | |
2597 | goto out; | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * OPEN the file, or upgrade an existing OPEN. | |
2602 | * If truncate fails, the OPEN fails. | |
2603 | */ | |
2604 | if (stp) { | |
2605 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2606 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2607 | if (status) |
2608 | goto out; | |
444c2c07 | 2609 | update_stateid(&stp->st_stateid); |
1da177e4 | 2610 | } else { |
f9d7562f | 2611 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2612 | if (status) |
1da177e4 LT |
2613 | goto out; |
2614 | init_stateid(stp, fp, open); | |
2615 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2616 | if (status) { | |
2283963f | 2617 | release_open_stateid(stp); |
1da177e4 LT |
2618 | goto out; |
2619 | } | |
6668958f AA |
2620 | if (nfsd4_has_session(&resp->cstate)) |
2621 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2622 | } |
2623 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2624 | ||
4dc6ec00 | 2625 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2626 | open->op_stateowner->so_confirmed = 1; |
2627 | ||
1da177e4 LT |
2628 | /* |
2629 | * Attempt to hand out a delegation. No error return, because the | |
2630 | * OPEN succeeds even if we fail. | |
2631 | */ | |
2632 | nfs4_open_delegation(current_fh, open, stp); | |
2633 | ||
2634 | status = nfs_ok; | |
2635 | ||
8c10cbdb BH |
2636 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2637 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2638 | out: |
13cd2184 N |
2639 | if (fp) |
2640 | put_nfs4_file(fp); | |
37515177 N |
2641 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2642 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2643 | /* |
2644 | * To finish the open response, we just need to set the rflags. | |
2645 | */ | |
2646 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2647 | if (!open->op_stateowner->so_confirmed && |
2648 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2649 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2650 | ||
2651 | return status; | |
2652 | } | |
2653 | ||
b37ad28b | 2654 | __be32 |
b591480b BF |
2655 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2656 | clientid_t *clid) | |
1da177e4 LT |
2657 | { |
2658 | struct nfs4_client *clp; | |
b37ad28b | 2659 | __be32 status; |
1da177e4 LT |
2660 | |
2661 | nfs4_lock_state(); | |
2662 | dprintk("process_renew(%08x/%08x): starting\n", | |
2663 | clid->cl_boot, clid->cl_id); | |
2664 | status = nfserr_stale_clientid; | |
2665 | if (STALE_CLIENTID(clid)) | |
2666 | goto out; | |
2667 | clp = find_confirmed_client(clid); | |
2668 | status = nfserr_expired; | |
2669 | if (clp == NULL) { | |
2670 | /* We assume the client took too long to RENEW. */ | |
2671 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2672 | goto out; | |
2673 | } | |
2674 | renew_client(clp); | |
2675 | status = nfserr_cb_path_down; | |
ea1da636 | 2676 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2677 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2678 | goto out; |
2679 | status = nfs_ok; | |
2680 | out: | |
2681 | nfs4_unlock_state(); | |
2682 | return status; | |
2683 | } | |
2684 | ||
af558e33 BF |
2685 | struct lock_manager nfsd4_manager = { |
2686 | }; | |
2687 | ||
a76b4319 | 2688 | static void |
af558e33 | 2689 | nfsd4_end_grace(void) |
a76b4319 N |
2690 | { |
2691 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2692 | nfsd4_recdir_purge_old(); |
af558e33 | 2693 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2694 | /* |
2695 | * Now that every NFSv4 client has had the chance to recover and | |
2696 | * to see the (possibly new, possibly shorter) lease time, we | |
2697 | * can safely set the next grace time to the current lease time: | |
2698 | */ | |
2699 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2700 | } |
2701 | ||
fd39ca9a | 2702 | static time_t |
1da177e4 LT |
2703 | nfs4_laundromat(void) |
2704 | { | |
2705 | struct nfs4_client *clp; | |
2706 | struct nfs4_stateowner *sop; | |
2707 | struct nfs4_delegation *dp; | |
2708 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2709 | time_t cutoff = get_seconds() - nfsd4_lease; |
2710 | time_t t, clientid_val = nfsd4_lease; | |
2711 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2712 | |
2713 | nfs4_lock_state(); | |
2714 | ||
2715 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2716 | if (locks_in_grace()) |
2717 | nfsd4_end_grace(); | |
36acb66b BH |
2718 | INIT_LIST_HEAD(&reaplist); |
2719 | spin_lock(&client_lock); | |
1da177e4 LT |
2720 | list_for_each_safe(pos, next, &client_lru) { |
2721 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2722 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2723 | t = clp->cl_time - cutoff; | |
2724 | if (clientid_val > t) | |
2725 | clientid_val = t; | |
2726 | break; | |
2727 | } | |
d7682988 BH |
2728 | if (atomic_read(&clp->cl_refcount)) { |
2729 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2730 | clp->cl_clientid.cl_id); | |
2731 | continue; | |
2732 | } | |
2733 | unhash_client_locked(clp); | |
2734 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2735 | } |
2736 | spin_unlock(&client_lock); | |
2737 | list_for_each_safe(pos, next, &reaplist) { | |
2738 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2739 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2740 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2741 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2742 | expire_client(clp); |
2743 | } | |
1da177e4 LT |
2744 | spin_lock(&recall_lock); |
2745 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2746 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2747 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2748 | u = dp->dl_time - cutoff; | |
2749 | if (test_val > u) | |
2750 | test_val = u; | |
2751 | break; | |
2752 | } | |
2753 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2754 | dp, dp->dl_flock); | |
2755 | list_move(&dp->dl_recall_lru, &reaplist); | |
2756 | } | |
2757 | spin_unlock(&recall_lock); | |
2758 | list_for_each_safe(pos, next, &reaplist) { | |
2759 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2760 | list_del_init(&dp->dl_recall_lru); | |
2761 | unhash_delegation(dp); | |
2762 | } | |
cf07d2ea | 2763 | test_val = nfsd4_lease; |
1da177e4 LT |
2764 | list_for_each_safe(pos, next, &close_lru) { |
2765 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2766 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2767 | u = sop->so_time - cutoff; | |
2768 | if (test_val > u) | |
2769 | test_val = u; | |
2770 | break; | |
2771 | } | |
2772 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2773 | sop->so_id); | |
f044ff83 | 2774 | release_openowner(sop); |
1da177e4 LT |
2775 | } |
2776 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2777 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2778 | nfs4_unlock_state(); | |
2779 | return clientid_val; | |
2780 | } | |
2781 | ||
a254b246 HH |
2782 | static struct workqueue_struct *laundry_wq; |
2783 | static void laundromat_main(struct work_struct *); | |
2784 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2785 | ||
2786 | static void | |
c4028958 | 2787 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2788 | { |
2789 | time_t t; | |
2790 | ||
2791 | t = nfs4_laundromat(); | |
2792 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2793 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2794 | } |
2795 | ||
fd39ca9a | 2796 | static struct nfs4_stateowner * |
f8816512 N |
2797 | search_close_lru(u32 st_id, int flags) |
2798 | { | |
1da177e4 LT |
2799 | struct nfs4_stateowner *local = NULL; |
2800 | ||
1da177e4 LT |
2801 | if (flags & CLOSE_STATE) { |
2802 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2803 | if (local->so_id == st_id) | |
2804 | return local; | |
2805 | } | |
2806 | } | |
2807 | return NULL; | |
2808 | } | |
2809 | ||
2810 | static inline int | |
2811 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2812 | { | |
f9d7562f | 2813 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
2814 | } |
2815 | ||
2816 | static int | |
2817 | STALE_STATEID(stateid_t *stateid) | |
2818 | { | |
e4e83ea4 BF |
2819 | if (stateid->si_boot == boot_time) |
2820 | return 0; | |
2821 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 2822 | STATEID_VAL(stateid)); |
e4e83ea4 | 2823 | return 1; |
1da177e4 LT |
2824 | } |
2825 | ||
2826 | static inline int | |
2827 | access_permit_read(unsigned long access_bmap) | |
2828 | { | |
2829 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2830 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2831 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2832 | } | |
2833 | ||
2834 | static inline int | |
2835 | access_permit_write(unsigned long access_bmap) | |
2836 | { | |
2837 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2838 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2839 | } | |
2840 | ||
2841 | static | |
b37ad28b | 2842 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2843 | { |
b37ad28b | 2844 | __be32 status = nfserr_openmode; |
1da177e4 | 2845 | |
02921914 BF |
2846 | /* For lock stateid's, we test the parent open, not the lock: */ |
2847 | if (stp->st_openstp) | |
2848 | stp = stp->st_openstp; | |
1da177e4 LT |
2849 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
2850 | goto out; | |
2851 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2852 | goto out; | |
2853 | status = nfs_ok; | |
2854 | out: | |
2855 | return status; | |
2856 | } | |
2857 | ||
b37ad28b | 2858 | static inline __be32 |
1da177e4 LT |
2859 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2860 | { | |
203a8c8e | 2861 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2862 | return nfs_ok; |
af558e33 | 2863 | else if (locks_in_grace()) { |
1da177e4 LT |
2864 | /* Answer in remaining cases depends on existance of |
2865 | * conflicting state; so we must wait out the grace period. */ | |
2866 | return nfserr_grace; | |
2867 | } else if (flags & WR_STATE) | |
2868 | return nfs4_share_conflict(current_fh, | |
2869 | NFS4_SHARE_DENY_WRITE); | |
2870 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2871 | return nfs4_share_conflict(current_fh, | |
2872 | NFS4_SHARE_DENY_READ); | |
2873 | } | |
2874 | ||
2875 | /* | |
2876 | * Allow READ/WRITE during grace period on recovered state only for files | |
2877 | * that are not able to provide mandatory locking. | |
2878 | */ | |
2879 | static inline int | |
18f82731 | 2880 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2881 | { |
203a8c8e | 2882 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2883 | } |
2884 | ||
6668958f | 2885 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2886 | { |
6668958f AA |
2887 | /* |
2888 | * When sessions are used the stateid generation number is ignored | |
2889 | * when it is zero. | |
2890 | */ | |
2891 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2892 | goto out; | |
2893 | ||
0836f587 BF |
2894 | /* If the client sends us a stateid from the future, it's buggy: */ |
2895 | if (in->si_generation > ref->si_generation) | |
2896 | return nfserr_bad_stateid; | |
2897 | /* | |
2898 | * The following, however, can happen. For example, if the | |
2899 | * client sends an open and some IO at the same time, the open | |
2900 | * may bump si_generation while the IO is still in flight. | |
2901 | * Thanks to hard links and renames, the client never knows what | |
2902 | * file an open will affect. So it could avoid that situation | |
2903 | * only by serializing all opens and IO from the same open | |
2904 | * owner. To recover from the old_stateid error, the client | |
2905 | * will just have to retry the IO: | |
2906 | */ | |
2907 | if (in->si_generation < ref->si_generation) | |
2908 | return nfserr_old_stateid; | |
6668958f | 2909 | out: |
0836f587 BF |
2910 | return nfs_ok; |
2911 | } | |
2912 | ||
3e633079 BF |
2913 | static int is_delegation_stateid(stateid_t *stateid) |
2914 | { | |
2915 | return stateid->si_fileid == 0; | |
2916 | } | |
2917 | ||
1da177e4 LT |
2918 | /* |
2919 | * Checks for stateid operations | |
2920 | */ | |
b37ad28b | 2921 | __be32 |
dd453dfd BH |
2922 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2923 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2924 | { |
2925 | struct nfs4_stateid *stp = NULL; | |
2926 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2927 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2928 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2929 | __be32 status; |
1da177e4 | 2930 | |
1da177e4 LT |
2931 | if (filpp) |
2932 | *filpp = NULL; | |
2933 | ||
18f82731 | 2934 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2935 | return nfserr_grace; |
2936 | ||
6668958f AA |
2937 | if (nfsd4_has_session(cstate)) |
2938 | flags |= HAS_SESSION; | |
2939 | ||
1da177e4 LT |
2940 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2941 | return check_special_stateids(current_fh, stateid, flags); | |
2942 | ||
1da177e4 LT |
2943 | status = nfserr_stale_stateid; |
2944 | if (STALE_STATEID(stateid)) | |
2945 | goto out; | |
2946 | ||
1da177e4 | 2947 | status = nfserr_bad_stateid; |
3e633079 | 2948 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2949 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 2950 | if (!dp) |
1da177e4 | 2951 | goto out; |
6668958f AA |
2952 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2953 | flags); | |
0c2a498f BF |
2954 | if (status) |
2955 | goto out; | |
dc9bf700 BF |
2956 | status = nfs4_check_delegmode(dp, flags); |
2957 | if (status) | |
2958 | goto out; | |
2959 | renew_client(dp->dl_client); | |
dc9bf700 | 2960 | if (filpp) |
f9d7562f BF |
2961 | *filpp = find_readable_file(dp->dl_file); |
2962 | BUG_ON(!*filpp); | |
1da177e4 | 2963 | } else { /* open or lock stateid */ |
a4455be0 | 2964 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 2965 | if (!stp) |
1da177e4 | 2966 | goto out; |
6150ef0d | 2967 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2968 | goto out; |
2969 | if (!stp->st_stateowner->so_confirmed) | |
2970 | goto out; | |
6668958f AA |
2971 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2972 | flags); | |
0c2a498f BF |
2973 | if (status) |
2974 | goto out; | |
a4455be0 BF |
2975 | status = nfs4_check_openmode(stp, flags); |
2976 | if (status) | |
1da177e4 LT |
2977 | goto out; |
2978 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
2979 | if (filpp) { |
2980 | if (flags & RD_STATE) | |
2981 | *filpp = find_readable_file(stp->st_file); | |
2982 | else | |
2983 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 2984 | } |
1da177e4 LT |
2985 | } |
2986 | status = nfs_ok; | |
2987 | out: | |
2988 | return status; | |
2989 | } | |
2990 | ||
4c4cd222 N |
2991 | static inline int |
2992 | setlkflg (int type) | |
2993 | { | |
2994 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2995 | RD_STATE : WR_STATE; | |
2996 | } | |
1da177e4 LT |
2997 | |
2998 | /* | |
2999 | * Checks for sequence id mutating operations. | |
3000 | */ | |
b37ad28b | 3001 | static __be32 |
dd453dfd BH |
3002 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3003 | stateid_t *stateid, int flags, | |
3004 | struct nfs4_stateowner **sopp, | |
3005 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3006 | { |
1da177e4 LT |
3007 | struct nfs4_stateid *stp; |
3008 | struct nfs4_stateowner *sop; | |
dd453dfd | 3009 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3010 | __be32 status; |
1da177e4 | 3011 | |
8c10cbdb BH |
3012 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3013 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3014 | |
1da177e4 LT |
3015 | *stpp = NULL; |
3016 | *sopp = NULL; | |
3017 | ||
1da177e4 | 3018 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3019 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3020 | return nfserr_bad_stateid; |
1da177e4 LT |
3021 | } |
3022 | ||
1da177e4 | 3023 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3024 | return nfserr_stale_stateid; |
6668958f AA |
3025 | |
3026 | if (nfsd4_has_session(cstate)) | |
3027 | flags |= HAS_SESSION; | |
3028 | ||
1da177e4 LT |
3029 | /* |
3030 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3031 | * the confirmed flag is incorrecly set, or the generation | |
3032 | * number is incorrect. | |
1da177e4 | 3033 | */ |
f8816512 N |
3034 | stp = find_stateid(stateid, flags); |
3035 | if (stp == NULL) { | |
3036 | /* | |
3037 | * Also, we should make sure this isn't just the result of | |
3038 | * a replayed close: | |
3039 | */ | |
3040 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
3041 | if (sop == NULL) | |
e4e83ea4 | 3042 | return nfserr_bad_stateid; |
f8816512 N |
3043 | *sopp = sop; |
3044 | goto check_replay; | |
3045 | } | |
1da177e4 | 3046 | |
39325bd0 BF |
3047 | *stpp = stp; |
3048 | *sopp = sop = stp->st_stateowner; | |
3049 | ||
4c4cd222 | 3050 | if (lock) { |
4c4cd222 | 3051 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3052 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3053 | int lkflg = 0; |
b37ad28b | 3054 | __be32 status; |
4c4cd222 N |
3055 | |
3056 | lkflg = setlkflg(lock->lk_type); | |
3057 | ||
3058 | if (lock->lk_is_new) { | |
599e0a22 BF |
3059 | if (!sop->so_is_open_owner) |
3060 | return nfserr_bad_stateid; | |
60adfc50 AA |
3061 | if (!(flags & HAS_SESSION) && |
3062 | !same_clid(&clp->cl_clientid, lockclid)) | |
3063 | return nfserr_bad_stateid; | |
599e0a22 BF |
3064 | /* stp is the open stateid */ |
3065 | status = nfs4_check_openmode(stp, lkflg); | |
3066 | if (status) | |
3067 | return status; | |
3068 | } else { | |
3069 | /* stp is the lock stateid */ | |
3070 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3071 | if (status) | |
3072 | return status; | |
4c4cd222 | 3073 | } |
1da177e4 LT |
3074 | } |
3075 | ||
f3362737 | 3076 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3077 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3078 | return nfserr_bad_stateid; |
1da177e4 LT |
3079 | } |
3080 | ||
1da177e4 LT |
3081 | /* |
3082 | * We now validate the seqid and stateid generation numbers. | |
3083 | * For the moment, we ignore the possibility of | |
3084 | * generation number wraparound. | |
3085 | */ | |
6668958f | 3086 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3087 | goto check_replay; |
3088 | ||
3a4f98bb | 3089 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3090 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3091 | " unconfirmed stateowner!\n"); |
3092 | return nfserr_bad_stateid; | |
1da177e4 | 3093 | } |
3a4f98bb | 3094 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3095 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3096 | " confirmed yet!\n"); |
3097 | return nfserr_bad_stateid; | |
1da177e4 | 3098 | } |
6668958f | 3099 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3100 | if (status) |
3101 | return status; | |
52fd004e | 3102 | renew_client(sop->so_client); |
3a4f98bb | 3103 | return nfs_ok; |
1da177e4 | 3104 | |
1da177e4 | 3105 | check_replay: |
bd9aac52 | 3106 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3107 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3108 | /* indicate replay to calling function */ |
a90b061c | 3109 | return nfserr_replay_me; |
1da177e4 | 3110 | } |
2fdada03 | 3111 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3112 | sop->so_seqid, seqid); |
3113 | *sopp = NULL; | |
3114 | return nfserr_bad_seqid; | |
1da177e4 LT |
3115 | } |
3116 | ||
b37ad28b | 3117 | __be32 |
ca364317 | 3118 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3119 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3120 | { |
b37ad28b | 3121 | __be32 status; |
1da177e4 LT |
3122 | struct nfs4_stateowner *sop; |
3123 | struct nfs4_stateid *stp; | |
3124 | ||
3125 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3126 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3127 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3128 | |
ca364317 | 3129 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3130 | if (status) |
3131 | return status; | |
1da177e4 LT |
3132 | |
3133 | nfs4_lock_state(); | |
3134 | ||
dd453dfd | 3135 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3136 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3137 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3138 | &oc->oc_stateowner, &stp, NULL))) |
3139 | goto out; | |
3140 | ||
3141 | sop = oc->oc_stateowner; | |
3142 | sop->so_confirmed = 1; | |
3143 | update_stateid(&stp->st_stateid); | |
3144 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3145 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3146 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3147 | |
3148 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3149 | out: |
f2327d9a | 3150 | if (oc->oc_stateowner) { |
1da177e4 | 3151 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3152 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3153 | } |
1da177e4 LT |
3154 | nfs4_unlock_state(); |
3155 | return status; | |
3156 | } | |
3157 | ||
3158 | ||
3159 | /* | |
3160 | * unset all bits in union bitmap (bmap) that | |
3161 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3162 | */ | |
3163 | static void | |
3164 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3165 | { | |
3166 | int i; | |
3167 | for (i = 1; i < 4; i++) { | |
3168 | if ((i & access) != i) | |
3169 | __clear_bit(i, bmap); | |
3170 | } | |
3171 | } | |
3172 | ||
3173 | static void | |
3174 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3175 | { | |
3176 | int i; | |
3177 | for (i = 0; i < 4; i++) { | |
3178 | if ((i & deny) != i) | |
3179 | __clear_bit(i, bmap); | |
3180 | } | |
3181 | } | |
3182 | ||
b37ad28b | 3183 | __be32 |
ca364317 BF |
3184 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3185 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3186 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3187 | { |
b37ad28b | 3188 | __be32 status; |
1da177e4 LT |
3189 | struct nfs4_stateid *stp; |
3190 | unsigned int share_access; | |
3191 | ||
3192 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3193 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3194 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3195 | |
d87a8ade | 3196 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3197 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3198 | return nfserr_inval; |
3199 | ||
3200 | nfs4_lock_state(); | |
dd453dfd | 3201 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3202 | od->od_seqid, |
1da177e4 | 3203 | &od->od_stateid, |
f3362737 | 3204 | OPEN_STATE, |
1da177e4 LT |
3205 | &od->od_stateowner, &stp, NULL))) |
3206 | goto out; | |
3207 | ||
3208 | status = nfserr_inval; | |
3209 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3210 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3211 | stp->st_access_bmap, od->od_share_access); | |
3212 | goto out; | |
3213 | } | |
3214 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3215 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3216 | stp->st_deny_bmap, od->od_share_deny); | |
3217 | goto out; | |
3218 | } | |
3219 | set_access(&share_access, stp->st_access_bmap); | |
f9d7562f | 3220 | nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); |
1da177e4 LT |
3221 | |
3222 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3223 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3224 | ||
3225 | update_stateid(&stp->st_stateid); | |
3226 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3227 | status = nfs_ok; | |
3228 | out: | |
f2327d9a | 3229 | if (od->od_stateowner) { |
1da177e4 | 3230 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3231 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3232 | } |
1da177e4 LT |
3233 | nfs4_unlock_state(); |
3234 | return status; | |
3235 | } | |
3236 | ||
3237 | /* | |
3238 | * nfs4_unlock_state() called after encode | |
3239 | */ | |
b37ad28b | 3240 | __be32 |
ca364317 | 3241 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3242 | struct nfsd4_close *close) |
1da177e4 | 3243 | { |
b37ad28b | 3244 | __be32 status; |
1da177e4 LT |
3245 | struct nfs4_stateid *stp; |
3246 | ||
3247 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3248 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3249 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3250 | |
3251 | nfs4_lock_state(); | |
3252 | /* check close_lru for replay */ | |
dd453dfd | 3253 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3254 | close->cl_seqid, |
1da177e4 | 3255 | &close->cl_stateid, |
f3362737 | 3256 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3257 | &close->cl_stateowner, &stp, NULL))) |
3258 | goto out; | |
1da177e4 LT |
3259 | status = nfs_ok; |
3260 | update_stateid(&stp->st_stateid); | |
3261 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3262 | ||
04ef5954 | 3263 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3264 | release_open_stateid(stp); |
04ef5954 BF |
3265 | |
3266 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3267 | * released by the laundromat service after the lease period | |
3268 | * to enable us to handle CLOSE replay | |
3269 | */ | |
3270 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3271 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3272 | out: |
f2327d9a | 3273 | if (close->cl_stateowner) { |
1da177e4 | 3274 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3275 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3276 | } |
1da177e4 LT |
3277 | nfs4_unlock_state(); |
3278 | return status; | |
3279 | } | |
3280 | ||
b37ad28b | 3281 | __be32 |
ca364317 BF |
3282 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3283 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3284 | { |
203a8c8e BF |
3285 | struct nfs4_delegation *dp; |
3286 | stateid_t *stateid = &dr->dr_stateid; | |
3287 | struct inode *inode; | |
b37ad28b | 3288 | __be32 status; |
6668958f | 3289 | int flags = 0; |
1da177e4 | 3290 | |
ca364317 | 3291 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3292 | return status; |
3293 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3294 | |
6668958f AA |
3295 | if (nfsd4_has_session(cstate)) |
3296 | flags |= HAS_SESSION; | |
1da177e4 | 3297 | nfs4_lock_state(); |
203a8c8e BF |
3298 | status = nfserr_bad_stateid; |
3299 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3300 | goto out; | |
3301 | status = nfserr_stale_stateid; | |
3302 | if (STALE_STATEID(stateid)) | |
3303 | goto out; | |
7e0f7cf5 | 3304 | status = nfserr_bad_stateid; |
203a8c8e BF |
3305 | if (!is_delegation_stateid(stateid)) |
3306 | goto out; | |
203a8c8e | 3307 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3308 | if (!dp) |
203a8c8e | 3309 | goto out; |
6668958f | 3310 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3311 | if (status) |
3312 | goto out; | |
3313 | renew_client(dp->dl_client); | |
3314 | ||
3315 | unhash_delegation(dp); | |
1da177e4 | 3316 | out: |
203a8c8e BF |
3317 | nfs4_unlock_state(); |
3318 | ||
1da177e4 LT |
3319 | return status; |
3320 | } | |
3321 | ||
3322 | ||
3323 | /* | |
3324 | * Lock owner state (byte-range locks) | |
3325 | */ | |
3326 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3327 | #define LOCK_HASH_BITS 8 | |
3328 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3329 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3330 | ||
87df4de8 BH |
3331 | static inline u64 |
3332 | end_offset(u64 start, u64 len) | |
3333 | { | |
3334 | u64 end; | |
3335 | ||
3336 | end = start + len; | |
3337 | return end >= start ? end: NFS4_MAX_UINT64; | |
3338 | } | |
3339 | ||
3340 | /* last octet in a range */ | |
3341 | static inline u64 | |
3342 | last_byte_offset(u64 start, u64 len) | |
3343 | { | |
3344 | u64 end; | |
3345 | ||
3346 | BUG_ON(!len); | |
3347 | end = start + len; | |
3348 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3349 | } | |
3350 | ||
1da177e4 LT |
3351 | #define lockownerid_hashval(id) \ |
3352 | ((id) & LOCK_HASH_MASK) | |
3353 | ||
3354 | static inline unsigned int | |
3355 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3356 | struct xdr_netobj *ownername) | |
3357 | { | |
3358 | return (file_hashval(inode) + cl_id | |
3359 | + opaque_hashval(ownername->data, ownername->len)) | |
3360 | & LOCK_HASH_MASK; | |
3361 | } | |
3362 | ||
3363 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3364 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3365 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3366 | ||
fd39ca9a | 3367 | static struct nfs4_stateid * |
1da177e4 LT |
3368 | find_stateid(stateid_t *stid, int flags) |
3369 | { | |
9346eff0 | 3370 | struct nfs4_stateid *local; |
1da177e4 LT |
3371 | u32 st_id = stid->si_stateownerid; |
3372 | u32 f_id = stid->si_fileid; | |
3373 | unsigned int hashval; | |
3374 | ||
3375 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3376 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3377 | hashval = stateid_hashval(st_id, f_id); |
3378 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3379 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3380 | (local->st_stateid.si_fileid == f_id)) | |
3381 | return local; | |
3382 | } | |
3383 | } | |
9346eff0 KK |
3384 | |
3385 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3386 | hashval = stateid_hashval(st_id, f_id); |
3387 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3388 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3389 | (local->st_stateid.si_fileid == f_id)) | |
3390 | return local; | |
3391 | } | |
849823c5 | 3392 | } |
1da177e4 LT |
3393 | return NULL; |
3394 | } | |
3395 | ||
3396 | static struct nfs4_delegation * | |
3397 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3398 | { | |
13cd2184 N |
3399 | struct nfs4_file *fp; |
3400 | struct nfs4_delegation *dl; | |
1da177e4 | 3401 | |
8c10cbdb BH |
3402 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3403 | STATEID_VAL(stid)); | |
1da177e4 | 3404 | |
1da177e4 | 3405 | fp = find_file(ino); |
13cd2184 N |
3406 | if (!fp) |
3407 | return NULL; | |
3408 | dl = find_delegation_file(fp, stid); | |
3409 | put_nfs4_file(fp); | |
3410 | return dl; | |
1da177e4 LT |
3411 | } |
3412 | ||
3413 | /* | |
3414 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3415 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3416 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3417 | * locking, this prevents us from being completely protocol-compliant. The | |
3418 | * real solution to this problem is to start using unsigned file offsets in | |
3419 | * the VFS, but this is a very deep change! | |
3420 | */ | |
3421 | static inline void | |
3422 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3423 | { | |
3424 | if (lock->fl_start < 0) | |
3425 | lock->fl_start = OFFSET_MAX; | |
3426 | if (lock->fl_end < 0) | |
3427 | lock->fl_end = OFFSET_MAX; | |
3428 | } | |
3429 | ||
d5b9026a N |
3430 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3431 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3432 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3433 | }; |
1da177e4 LT |
3434 | |
3435 | static inline void | |
3436 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3437 | { | |
d5b9026a | 3438 | struct nfs4_stateowner *sop; |
1da177e4 | 3439 | |
d5b9026a N |
3440 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3441 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3442 | kref_get(&sop->so_ref); |
3443 | deny->ld_sop = sop; | |
3444 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3445 | } else { |
3446 | deny->ld_sop = NULL; | |
3447 | deny->ld_clientid.cl_boot = 0; | |
3448 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3449 | } |
3450 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3451 | deny->ld_length = NFS4_MAX_UINT64; |
3452 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3453 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3454 | deny->ld_type = NFS4_READ_LT; | |
3455 | if (fl->fl_type != F_RDLCK) | |
3456 | deny->ld_type = NFS4_WRITE_LT; | |
3457 | } | |
3458 | ||
1da177e4 LT |
3459 | static struct nfs4_stateowner * |
3460 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3461 | struct xdr_netobj *owner) | |
3462 | { | |
3463 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3464 | struct nfs4_stateowner *op; | |
3465 | ||
3466 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3467 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3468 | return op; |
3469 | } | |
3470 | return NULL; | |
3471 | } | |
3472 | ||
3473 | /* | |
3474 | * Alloc a lock owner structure. | |
3475 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3476 | * occured. | |
3477 | * | |
3478 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3479 | */ |
3480 | ||
3481 | static struct nfs4_stateowner * | |
3482 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3483 | struct nfs4_stateowner *sop; | |
3484 | struct nfs4_replay *rp; | |
3485 | unsigned int idhashval; | |
3486 | ||
3487 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3488 | return NULL; | |
3489 | idhashval = lockownerid_hashval(current_ownerid); | |
3490 | INIT_LIST_HEAD(&sop->so_idhash); | |
3491 | INIT_LIST_HEAD(&sop->so_strhash); | |
3492 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3493 | INIT_LIST_HEAD(&sop->so_stateids); |
3494 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3495 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3496 | sop->so_time = 0; | |
3497 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3498 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3499 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3500 | sop->so_is_open_owner = 0; |
3501 | sop->so_id = current_ownerid++; | |
3502 | sop->so_client = clp; | |
b59e3c0e NB |
3503 | /* It is the openowner seqid that will be incremented in encode in the |
3504 | * case of new lockowners; so increment the lock seqid manually: */ | |
3505 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3506 | sop->so_confirmed = 1; |
3507 | rp = &sop->so_replay; | |
de1ae286 | 3508 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3509 | rp->rp_buflen = 0; |
3510 | rp->rp_buf = rp->rp_ibuf; | |
3511 | return sop; | |
3512 | } | |
3513 | ||
fd39ca9a | 3514 | static struct nfs4_stateid * |
1da177e4 LT |
3515 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3516 | { | |
3517 | struct nfs4_stateid *stp; | |
3518 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3519 | ||
5ac049ac N |
3520 | stp = nfs4_alloc_stateid(); |
3521 | if (stp == NULL) | |
1da177e4 LT |
3522 | goto out; |
3523 | INIT_LIST_HEAD(&stp->st_hash); | |
3524 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3525 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3526 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3527 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3528 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3529 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3530 | stp->st_stateowner = sop; |
13cd2184 | 3531 | get_nfs4_file(fp); |
1da177e4 | 3532 | stp->st_file = fp; |
e4e83ea4 | 3533 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3534 | stp->st_stateid.si_stateownerid = sop->so_id; |
3535 | stp->st_stateid.si_fileid = fp->fi_id; | |
3536 | stp->st_stateid.si_generation = 0; | |
1da177e4 | 3537 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3538 | stp->st_openstp = open_stp; |
1da177e4 LT |
3539 | |
3540 | out: | |
3541 | return stp; | |
3542 | } | |
3543 | ||
fd39ca9a | 3544 | static int |
1da177e4 LT |
3545 | check_lock_length(u64 offset, u64 length) |
3546 | { | |
87df4de8 | 3547 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3548 | LOFF_OVERFLOW(offset, length))); |
3549 | } | |
3550 | ||
3551 | /* | |
3552 | * LOCK operation | |
3553 | */ | |
b37ad28b | 3554 | __be32 |
ca364317 | 3555 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3556 | struct nfsd4_lock *lock) |
1da177e4 | 3557 | { |
3e9e3dbe | 3558 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3559 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3560 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3561 | struct nfs4_file *fp; |
3562 | struct file *filp = NULL; | |
1da177e4 | 3563 | struct file_lock file_lock; |
8dc7c311 | 3564 | struct file_lock conflock; |
b37ad28b | 3565 | __be32 status = 0; |
1da177e4 | 3566 | unsigned int strhashval; |
150b3934 | 3567 | unsigned int cmd; |
b8dd7b9a | 3568 | int err; |
1da177e4 LT |
3569 | |
3570 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3571 | (long long) lock->lk_offset, | |
3572 | (long long) lock->lk_length); | |
3573 | ||
1da177e4 LT |
3574 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3575 | return nfserr_inval; | |
3576 | ||
ca364317 | 3577 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3578 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3579 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3580 | return status; | |
3581 | } | |
3582 | ||
1da177e4 LT |
3583 | nfs4_lock_state(); |
3584 | ||
3585 | if (lock->lk_is_new) { | |
893f8770 N |
3586 | /* |
3587 | * Client indicates that this is a new lockowner. | |
3588 | * Use open owner and open stateid to create lock owner and | |
3589 | * lock stateid. | |
3590 | */ | |
1da177e4 | 3591 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3592 | |
3593 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3594 | if (!nfsd4_has_session(cstate) && |
3595 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3596 | goto out; |
1da177e4 | 3597 | |
1da177e4 | 3598 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3599 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3600 | lock->lk_new_open_seqid, |
3601 | &lock->lk_new_open_stateid, | |
f3362737 | 3602 | OPEN_STATE, |
3a65588a | 3603 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3604 | lock); |
37515177 | 3605 | if (status) |
1da177e4 | 3606 | goto out; |
3a65588a | 3607 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3608 | /* create lockowner and lock stateid */ |
3609 | fp = open_stp->st_file; | |
3610 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3611 | open_sop->so_client->cl_clientid.cl_id, | |
3612 | &lock->v.new.owner); | |
3e9e3dbe N |
3613 | /* XXX: Do we need to check for duplicate stateowners on |
3614 | * the same file, or should they just be allowed (and | |
3615 | * create new stateids)? */ | |
1da177e4 | 3616 | status = nfserr_resource; |
b59e3c0e NB |
3617 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3618 | open_sop->so_client, open_stp, lock); | |
3619 | if (lock_sop == NULL) | |
1da177e4 | 3620 | goto out; |
b59e3c0e | 3621 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3622 | if (lock_stp == NULL) |
1da177e4 | 3623 | goto out; |
1da177e4 LT |
3624 | } else { |
3625 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3626 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3627 | lock->lk_old_lock_seqid, |
3628 | &lock->lk_old_lock_stateid, | |
f3362737 | 3629 | LOCK_STATE, |
3a65588a | 3630 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3631 | if (status) |
3632 | goto out; | |
3a65588a | 3633 | lock_sop = lock->lk_replay_owner; |
7d947842 | 3634 | fp = lock_stp->st_file; |
1da177e4 | 3635 | } |
3a65588a | 3636 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 3637 | |
0dd395dc | 3638 | status = nfserr_grace; |
af558e33 | 3639 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3640 | goto out; |
3641 | status = nfserr_no_grace; | |
af558e33 | 3642 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3643 | goto out; |
3644 | ||
1da177e4 LT |
3645 | locks_init_lock(&file_lock); |
3646 | switch (lock->lk_type) { | |
3647 | case NFS4_READ_LT: | |
3648 | case NFS4_READW_LT: | |
7d947842 BF |
3649 | if (find_readable_file(lock_stp->st_file)) { |
3650 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ); | |
3651 | filp = find_readable_file(lock_stp->st_file); | |
3652 | } | |
1da177e4 | 3653 | file_lock.fl_type = F_RDLCK; |
150b3934 | 3654 | cmd = F_SETLK; |
1da177e4 LT |
3655 | break; |
3656 | case NFS4_WRITE_LT: | |
3657 | case NFS4_WRITEW_LT: | |
7d947842 BF |
3658 | if (find_writeable_file(lock_stp->st_file)) { |
3659 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE); | |
3660 | filp = find_writeable_file(lock_stp->st_file); | |
3661 | } | |
1da177e4 | 3662 | file_lock.fl_type = F_WRLCK; |
150b3934 | 3663 | cmd = F_SETLK; |
1da177e4 LT |
3664 | break; |
3665 | default: | |
3666 | status = nfserr_inval; | |
3667 | goto out; | |
3668 | } | |
f9d7562f BF |
3669 | if (!filp) { |
3670 | status = nfserr_openmode; | |
3671 | goto out; | |
3672 | } | |
b59e3c0e | 3673 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3674 | file_lock.fl_pid = current->tgid; |
3675 | file_lock.fl_file = filp; | |
3676 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3677 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3678 | |
3679 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3680 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3681 | nfs4_transform_lock_offset(&file_lock); |
3682 | ||
3683 | /* | |
3684 | * Try to lock the file in the VFS. | |
3685 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3686 | */ | |
3687 | ||
fd85b817 | 3688 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3689 | switch (-err) { |
1da177e4 LT |
3690 | case 0: /* success! */ |
3691 | update_stateid(&lock_stp->st_stateid); | |
3692 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3693 | sizeof(stateid_t)); | |
b8dd7b9a | 3694 | status = 0; |
eb76b3fd AA |
3695 | break; |
3696 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3697 | status = nfserr_denied; | |
3698 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3699 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3700 | break; | |
1da177e4 LT |
3701 | case (EDEADLK): |
3702 | status = nfserr_deadlock; | |
eb76b3fd | 3703 | break; |
1da177e4 | 3704 | default: |
fd85b817 | 3705 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3706 | status = nfserr_resource; |
3707 | break; | |
1da177e4 | 3708 | } |
1da177e4 | 3709 | out: |
8a280510 | 3710 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3711 | release_lockowner(lock_sop); |
3a65588a BF |
3712 | if (lock->lk_replay_owner) { |
3713 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3714 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3715 | } |
1da177e4 LT |
3716 | nfs4_unlock_state(); |
3717 | return status; | |
3718 | } | |
3719 | ||
55ef1274 BF |
3720 | /* |
3721 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3722 | * so we do a temporary open here just to get an open file to pass to | |
3723 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3724 | * inode operation.) | |
3725 | */ | |
3726 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3727 | { | |
3728 | struct file *file; | |
3729 | int err; | |
3730 | ||
3731 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3732 | if (err) | |
3733 | return err; | |
3734 | err = vfs_test_lock(file, lock); | |
3735 | nfsd_close(file); | |
3736 | return err; | |
3737 | } | |
3738 | ||
1da177e4 LT |
3739 | /* |
3740 | * LOCKT operation | |
3741 | */ | |
b37ad28b | 3742 | __be32 |
ca364317 BF |
3743 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3744 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3745 | { |
3746 | struct inode *inode; | |
1da177e4 | 3747 | struct file_lock file_lock; |
fd85b817 | 3748 | int error; |
b37ad28b | 3749 | __be32 status; |
1da177e4 | 3750 | |
af558e33 | 3751 | if (locks_in_grace()) |
1da177e4 LT |
3752 | return nfserr_grace; |
3753 | ||
3754 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3755 | return nfserr_inval; | |
3756 | ||
3757 | lockt->lt_stateowner = NULL; | |
3758 | nfs4_lock_state(); | |
3759 | ||
3760 | status = nfserr_stale_clientid; | |
60adfc50 | 3761 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3762 | goto out; |
1da177e4 | 3763 | |
ca364317 | 3764 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3765 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3766 | if (status == nfserr_symlink) |
3767 | status = nfserr_inval; | |
3768 | goto out; | |
3769 | } | |
3770 | ||
ca364317 | 3771 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3772 | locks_init_lock(&file_lock); |
3773 | switch (lockt->lt_type) { | |
3774 | case NFS4_READ_LT: | |
3775 | case NFS4_READW_LT: | |
3776 | file_lock.fl_type = F_RDLCK; | |
3777 | break; | |
3778 | case NFS4_WRITE_LT: | |
3779 | case NFS4_WRITEW_LT: | |
3780 | file_lock.fl_type = F_WRLCK; | |
3781 | break; | |
3782 | default: | |
2fdada03 | 3783 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3784 | status = nfserr_inval; |
3785 | goto out; | |
3786 | } | |
3787 | ||
3788 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3789 | &lockt->lt_clientid, &lockt->lt_owner); | |
3790 | if (lockt->lt_stateowner) | |
3791 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3792 | file_lock.fl_pid = current->tgid; | |
3793 | file_lock.fl_flags = FL_POSIX; | |
3794 | ||
3795 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3796 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3797 | |
3798 | nfs4_transform_lock_offset(&file_lock); | |
3799 | ||
1da177e4 | 3800 | status = nfs_ok; |
55ef1274 | 3801 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3802 | if (error) { |
3803 | status = nfserrno(error); | |
3804 | goto out; | |
3805 | } | |
9d6a8c5c | 3806 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3807 | status = nfserr_denied; |
9d6a8c5c | 3808 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3809 | } |
3810 | out: | |
3811 | nfs4_unlock_state(); | |
3812 | return status; | |
3813 | } | |
3814 | ||
b37ad28b | 3815 | __be32 |
ca364317 | 3816 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3817 | struct nfsd4_locku *locku) |
1da177e4 LT |
3818 | { |
3819 | struct nfs4_stateid *stp; | |
3820 | struct file *filp = NULL; | |
3821 | struct file_lock file_lock; | |
b37ad28b | 3822 | __be32 status; |
b8dd7b9a | 3823 | int err; |
1da177e4 LT |
3824 | |
3825 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3826 | (long long) locku->lu_offset, | |
3827 | (long long) locku->lu_length); | |
3828 | ||
3829 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3830 | return nfserr_inval; | |
3831 | ||
3832 | nfs4_lock_state(); | |
3833 | ||
dd453dfd | 3834 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3835 | locku->lu_seqid, |
3836 | &locku->lu_stateid, | |
f3362737 | 3837 | LOCK_STATE, |
1da177e4 LT |
3838 | &locku->lu_stateowner, &stp, NULL))) |
3839 | goto out; | |
3840 | ||
f9d7562f BF |
3841 | filp = find_any_file(stp->st_file); |
3842 | if (!filp) { | |
3843 | status = nfserr_lock_range; | |
3844 | goto out; | |
3845 | } | |
1da177e4 LT |
3846 | BUG_ON(!filp); |
3847 | locks_init_lock(&file_lock); | |
3848 | file_lock.fl_type = F_UNLCK; | |
3849 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3850 | file_lock.fl_pid = current->tgid; | |
3851 | file_lock.fl_file = filp; | |
3852 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3853 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3854 | file_lock.fl_start = locku->lu_offset; |
3855 | ||
87df4de8 | 3856 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3857 | nfs4_transform_lock_offset(&file_lock); |
3858 | ||
3859 | /* | |
3860 | * Try to unlock the file in the VFS. | |
3861 | */ | |
fd85b817 | 3862 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3863 | if (err) { |
fd85b817 | 3864 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3865 | goto out_nfserr; |
3866 | } | |
3867 | /* | |
3868 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3869 | */ | |
3870 | update_stateid(&stp->st_stateid); | |
3871 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3872 | ||
3873 | out: | |
f2327d9a | 3874 | if (locku->lu_stateowner) { |
1da177e4 | 3875 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3876 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3877 | } |
1da177e4 LT |
3878 | nfs4_unlock_state(); |
3879 | return status; | |
3880 | ||
3881 | out_nfserr: | |
b8dd7b9a | 3882 | status = nfserrno(err); |
1da177e4 LT |
3883 | goto out; |
3884 | } | |
3885 | ||
3886 | /* | |
3887 | * returns | |
3888 | * 1: locks held by lockowner | |
3889 | * 0: no locks held by lockowner | |
3890 | */ | |
3891 | static int | |
f9d7562f | 3892 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
3893 | { |
3894 | struct file_lock **flpp; | |
f9d7562f | 3895 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
3896 | int status = 0; |
3897 | ||
3898 | lock_kernel(); | |
3899 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3900 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3901 | status = 1; |
3902 | goto out; | |
796dadfd | 3903 | } |
1da177e4 LT |
3904 | } |
3905 | out: | |
3906 | unlock_kernel(); | |
3907 | return status; | |
3908 | } | |
3909 | ||
b37ad28b | 3910 | __be32 |
b591480b BF |
3911 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3912 | struct nfsd4_compound_state *cstate, | |
3913 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3914 | { |
3915 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3916 | struct nfs4_stateowner *sop; |
3917 | struct nfs4_stateid *stp; | |
1da177e4 | 3918 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3919 | struct list_head matches; |
3920 | int i; | |
b37ad28b | 3921 | __be32 status; |
1da177e4 LT |
3922 | |
3923 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3924 | clid->cl_boot, clid->cl_id); | |
3925 | ||
3926 | /* XXX check for lease expiration */ | |
3927 | ||
3928 | status = nfserr_stale_clientid; | |
849823c5 | 3929 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3930 | return status; |
1da177e4 LT |
3931 | |
3932 | nfs4_lock_state(); | |
3933 | ||
3e9e3dbe N |
3934 | status = nfserr_locks_held; |
3935 | /* XXX: we're doing a linear search through all the lockowners. | |
3936 | * Yipes! For now we'll just hope clients aren't really using | |
3937 | * release_lockowner much, but eventually we have to fix these | |
3938 | * data structures. */ | |
3939 | INIT_LIST_HEAD(&matches); | |
3940 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3941 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3942 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3943 | continue; |
3944 | list_for_each_entry(stp, &sop->so_stateids, | |
3945 | st_perstateowner) { | |
f9d7562f | 3946 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
3947 | goto out; |
3948 | /* Note: so_perclient unused for lockowners, | |
3949 | * so it's OK to fool with here. */ | |
3950 | list_add(&sop->so_perclient, &matches); | |
3951 | } | |
1da177e4 | 3952 | } |
3e9e3dbe N |
3953 | } |
3954 | /* Clients probably won't expect us to return with some (but not all) | |
3955 | * of the lockowner state released; so don't release any until all | |
3956 | * have been checked. */ | |
3957 | status = nfs_ok; | |
0fa822e4 N |
3958 | while (!list_empty(&matches)) { |
3959 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3960 | so_perclient); | |
3961 | /* unhash_stateowner deletes so_perclient only | |
3962 | * for openowners. */ | |
3963 | list_del(&sop->so_perclient); | |
f044ff83 | 3964 | release_lockowner(sop); |
1da177e4 LT |
3965 | } |
3966 | out: | |
3967 | nfs4_unlock_state(); | |
3968 | return status; | |
3969 | } | |
3970 | ||
3971 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3972 | alloc_reclaim(void) |
1da177e4 | 3973 | { |
a55370a3 | 3974 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3975 | } |
3976 | ||
c7b9a459 | 3977 | int |
a1bcecd2 | 3978 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3979 | { |
3980 | unsigned int strhashval = clientstr_hashval(name); | |
3981 | struct nfs4_client *clp; | |
3982 | ||
a1bcecd2 | 3983 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3984 | return clp ? 1 : 0; |
3985 | } | |
3986 | ||
1da177e4 LT |
3987 | /* |
3988 | * failure => all reset bets are off, nfserr_no_grace... | |
3989 | */ | |
190e4fbf N |
3990 | int |
3991 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3992 | { |
3993 | unsigned int strhashval; | |
3994 | struct nfs4_client_reclaim *crp = NULL; | |
3995 | ||
a55370a3 N |
3996 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3997 | crp = alloc_reclaim(); | |
1da177e4 LT |
3998 | if (!crp) |
3999 | return 0; | |
a55370a3 | 4000 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4001 | INIT_LIST_HEAD(&crp->cr_strhash); |
4002 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4003 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4004 | reclaim_str_hashtbl_size++; |
4005 | return 1; | |
4006 | } | |
4007 | ||
4008 | static void | |
4009 | nfs4_release_reclaim(void) | |
4010 | { | |
4011 | struct nfs4_client_reclaim *crp = NULL; | |
4012 | int i; | |
4013 | ||
1da177e4 LT |
4014 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4015 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4016 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4017 | struct nfs4_client_reclaim, cr_strhash); | |
4018 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4019 | kfree(crp); |
4020 | reclaim_str_hashtbl_size--; | |
4021 | } | |
4022 | } | |
4023 | BUG_ON(reclaim_str_hashtbl_size); | |
4024 | } | |
4025 | ||
4026 | /* | |
4027 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4028 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4029 | nfs4_find_reclaim_client(clientid_t *clid) |
4030 | { | |
4031 | unsigned int strhashval; | |
4032 | struct nfs4_client *clp; | |
4033 | struct nfs4_client_reclaim *crp = NULL; | |
4034 | ||
4035 | ||
4036 | /* find clientid in conf_id_hashtbl */ | |
4037 | clp = find_confirmed_client(clid); | |
4038 | if (clp == NULL) | |
4039 | return NULL; | |
4040 | ||
a55370a3 N |
4041 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4042 | clp->cl_name.len, clp->cl_name.data, | |
4043 | clp->cl_recdir); | |
1da177e4 LT |
4044 | |
4045 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4046 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4047 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4048 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4049 | return crp; |
4050 | } | |
4051 | } | |
4052 | return NULL; | |
4053 | } | |
4054 | ||
4055 | /* | |
4056 | * Called from OPEN. Look for clientid in reclaim list. | |
4057 | */ | |
b37ad28b | 4058 | __be32 |
1da177e4 LT |
4059 | nfs4_check_open_reclaim(clientid_t *clid) |
4060 | { | |
dfc83565 | 4061 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4062 | } |
4063 | ||
ac4d8ff2 | 4064 | /* initialization to perform at module load time: */ |
1da177e4 | 4065 | |
e8ff2a84 | 4066 | int |
ac4d8ff2 | 4067 | nfs4_state_init(void) |
1da177e4 | 4068 | { |
e8ff2a84 | 4069 | int i, status; |
1da177e4 | 4070 | |
e8ff2a84 BF |
4071 | status = nfsd4_init_slabs(); |
4072 | if (status) | |
4073 | return status; | |
1da177e4 LT |
4074 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4075 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4076 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4077 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4078 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4079 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4080 | } |
5282fd72 ME |
4081 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4082 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4083 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4084 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4085 | } | |
4086 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4087 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4088 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4089 | } | |
4090 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4091 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4092 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4093 | } | |
4094 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4095 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4096 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4097 | } | |
1da177e4 | 4098 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4099 | INIT_LIST_HEAD(&close_lru); |
4100 | INIT_LIST_HEAD(&client_lru); | |
4101 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4102 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4103 | return 0; |
ac4d8ff2 N |
4104 | } |
4105 | ||
190e4fbf N |
4106 | static void |
4107 | nfsd4_load_reboot_recovery_data(void) | |
4108 | { | |
4109 | int status; | |
4110 | ||
0964a3d3 N |
4111 | nfs4_lock_state(); |
4112 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4113 | status = nfsd4_recdir_load(); |
0964a3d3 | 4114 | nfs4_unlock_state(); |
190e4fbf N |
4115 | if (status) |
4116 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4117 | } | |
4118 | ||
c2f1a551 MS |
4119 | /* |
4120 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4121 | * client may quite reasonably hang on to a delegation as long as it has | |
4122 | * the inode cached. This becomes an obvious problem the first time a | |
4123 | * client's inode cache approaches the size of the server's total memory. | |
4124 | * | |
4125 | * For now we avoid this problem by imposing a hard limit on the number | |
4126 | * of delegations, which varies according to the server's memory size. | |
4127 | */ | |
4128 | static void | |
4129 | set_max_delegations(void) | |
4130 | { | |
4131 | /* | |
4132 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4133 | * estimates suggest that in the worst case (where every delegation | |
4134 | * is for a different inode), a delegation could take about 1.5K, | |
4135 | * giving a worst case usage of about 6% of memory. | |
4136 | */ | |
4137 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4138 | } | |
4139 | ||
ac4d8ff2 N |
4140 | /* initialization to perform when the nfsd service is started: */ |
4141 | ||
29ab23cc | 4142 | static int |
ac4d8ff2 N |
4143 | __nfs4_state_start(void) |
4144 | { | |
b5a1a81e BF |
4145 | int ret; |
4146 | ||
1da177e4 | 4147 | boot_time = get_seconds(); |
af558e33 | 4148 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4149 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4150 | nfsd4_grace); |
b5a1a81e BF |
4151 | ret = set_callback_cred(); |
4152 | if (ret) | |
4153 | return -ENOMEM; | |
58da282b | 4154 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4155 | if (laundry_wq == NULL) |
4156 | return -ENOMEM; | |
b5a1a81e BF |
4157 | ret = nfsd4_create_callback_queue(); |
4158 | if (ret) | |
4159 | goto out_free_laundry; | |
e46b498c | 4160 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4161 | set_max_delegations(); |
b5a1a81e BF |
4162 | return 0; |
4163 | out_free_laundry: | |
4164 | destroy_workqueue(laundry_wq); | |
4165 | return ret; | |
1da177e4 LT |
4166 | } |
4167 | ||
29ab23cc | 4168 | int |
76a3550e | 4169 | nfs4_state_start(void) |
1da177e4 | 4170 | { |
190e4fbf | 4171 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4172 | return __nfs4_state_start(); |
1da177e4 LT |
4173 | } |
4174 | ||
1da177e4 LT |
4175 | static void |
4176 | __nfs4_state_shutdown(void) | |
4177 | { | |
4178 | int i; | |
4179 | struct nfs4_client *clp = NULL; | |
4180 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4181 | struct list_head *pos, *next, reaplist; |
4182 | ||
1da177e4 LT |
4183 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4184 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4185 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4186 | expire_client(clp); | |
4187 | } | |
4188 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4189 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4190 | expire_client(clp); | |
4191 | } | |
4192 | } | |
4193 | INIT_LIST_HEAD(&reaplist); | |
4194 | spin_lock(&recall_lock); | |
4195 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4196 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4197 | list_move(&dp->dl_recall_lru, &reaplist); | |
4198 | } | |
4199 | spin_unlock(&recall_lock); | |
4200 | list_for_each_safe(pos, next, &reaplist) { | |
4201 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4202 | list_del_init(&dp->dl_recall_lru); | |
4203 | unhash_delegation(dp); | |
4204 | } | |
4205 | ||
190e4fbf | 4206 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4207 | } |
4208 | ||
4209 | void | |
4210 | nfs4_state_shutdown(void) | |
4211 | { | |
5e8d5c29 N |
4212 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4213 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4214 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4215 | nfs4_lock_state(); |
4216 | nfs4_release_reclaim(); | |
4217 | __nfs4_state_shutdown(); | |
1da177e4 | 4218 | nfs4_unlock_state(); |
c3935e30 | 4219 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4220 | } |
4221 | ||
3dd98a3b JL |
4222 | /* |
4223 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4224 | * accessed when nfsd is starting. | |
4225 | */ | |
0964a3d3 N |
4226 | static void |
4227 | nfs4_set_recdir(char *recdir) | |
4228 | { | |
0964a3d3 | 4229 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4230 | } |
4231 | ||
4232 | /* | |
4233 | * Change the NFSv4 recovery directory to recdir. | |
4234 | */ | |
4235 | int | |
4236 | nfs4_reset_recoverydir(char *recdir) | |
4237 | { | |
4238 | int status; | |
a63bb996 | 4239 | struct path path; |
0964a3d3 | 4240 | |
a63bb996 | 4241 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4242 | if (status) |
4243 | return status; | |
4244 | status = -ENOTDIR; | |
a63bb996 | 4245 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4246 | nfs4_set_recdir(recdir); |
4247 | status = 0; | |
4248 | } | |
a63bb996 | 4249 | path_put(&path); |
0964a3d3 N |
4250 | return status; |
4251 | } | |
4252 | ||
3dd98a3b JL |
4253 | char * |
4254 | nfs4_recoverydir(void) | |
4255 | { | |
4256 | return user_recovery_dirname; | |
4257 | } |