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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; | |
1da177e4 LT |
210 | |
211 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
212 | /* |
213 | * Major work on the lease subsystem (for example, to support | |
214 | * calbacks on stat) will be required before we can support | |
215 | * write delegations properly. | |
216 | */ | |
217 | if (type != NFS4_OPEN_DELEGATE_READ) | |
218 | return NULL; | |
47f9940c MS |
219 | if (fp->fi_had_conflict) |
220 | return NULL; | |
c2f1a551 | 221 | if (num_delegations > max_delegations) |
ef0f3390 | 222 | return NULL; |
5b2d21c1 N |
223 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
224 | if (dp == NULL) | |
1da177e4 | 225 | return dp; |
ef0f3390 | 226 | num_delegations++; |
ea1da636 N |
227 | INIT_LIST_HEAD(&dp->dl_perfile); |
228 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
229 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
230 | dp->dl_client = clp; | |
13cd2184 | 231 | get_nfs4_file(fp); |
1da177e4 | 232 | dp->dl_file = fp; |
f9d7562f | 233 | nfs4_file_get_access(fp, O_RDONLY); |
1da177e4 | 234 | dp->dl_flock = NULL; |
1da177e4 | 235 | dp->dl_type = type; |
e4e83ea4 | 236 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
237 | dp->dl_stateid.si_stateownerid = current_delegid++; |
238 | dp->dl_stateid.si_fileid = 0; | |
239 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 240 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
241 | dp->dl_time = 0; |
242 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
243 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
244 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
b5a1a81e | 245 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
246 | return dp; |
247 | } | |
248 | ||
249 | void | |
250 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
251 | { | |
252 | if (atomic_dec_and_test(&dp->dl_count)) { | |
253 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 254 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 255 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 256 | num_delegations--; |
1da177e4 LT |
257 | } |
258 | } | |
259 | ||
260 | /* Remove the associated file_lock first, then remove the delegation. | |
261 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
262 | * the i_flock list, eventually calling nfsd's lock_manager | |
263 | * fl_release_callback. | |
264 | */ | |
265 | static void | |
266 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
267 | { | |
f9d7562f | 268 | struct file *filp = find_readable_file(dp->dl_file); |
1da177e4 LT |
269 | |
270 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
c907132d | 271 | if (dp->dl_flock) |
a9933cea | 272 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
f9d7562f | 273 | nfs4_file_put_access(dp->dl_file, O_RDONLY); |
1da177e4 LT |
274 | } |
275 | ||
276 | /* Called under the state lock. */ | |
277 | static void | |
278 | unhash_delegation(struct nfs4_delegation *dp) | |
279 | { | |
ea1da636 N |
280 | list_del_init(&dp->dl_perfile); |
281 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
282 | spin_lock(&recall_lock); |
283 | list_del_init(&dp->dl_recall_lru); | |
284 | spin_unlock(&recall_lock); | |
285 | nfs4_close_delegation(dp); | |
286 | nfs4_put_delegation(dp); | |
287 | } | |
288 | ||
289 | /* | |
290 | * SETCLIENTID state | |
291 | */ | |
292 | ||
36acb66b | 293 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
294 | static DEFINE_SPINLOCK(client_lock); |
295 | ||
1da177e4 LT |
296 | /* Hash tables for nfs4_clientid state */ |
297 | #define CLIENT_HASH_BITS 4 | |
298 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
299 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
300 | ||
301 | #define clientid_hashval(id) \ | |
302 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
303 | #define clientstr_hashval(name) \ |
304 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
305 | /* |
306 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
307 | * used in reboot/reset lease grace period processing | |
308 | * | |
309 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
310 | * setclientid_confirmed info. | |
311 | * | |
312 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
313 | * setclientid info. | |
314 | * | |
315 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
316 | * for lease renewal. | |
317 | * | |
318 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
319 | * for last close replay. | |
320 | */ | |
321 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
322 | static int reclaim_str_hashtbl_size = 0; | |
323 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
324 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
325 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
326 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
327 | static struct list_head client_lru; | |
328 | static struct list_head close_lru; | |
329 | ||
2283963f BF |
330 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
331 | { | |
332 | list_del(&stp->st_hash); | |
333 | list_del(&stp->st_perfile); | |
334 | list_del(&stp->st_perstateowner); | |
335 | } | |
336 | ||
337 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
338 | { | |
339 | put_nfs4_file(stp->st_file); | |
340 | kmem_cache_free(stateid_slab, stp); | |
341 | } | |
342 | ||
343 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
344 | { | |
f9d7562f BF |
345 | struct file *file; |
346 | ||
2283963f | 347 | unhash_generic_stateid(stp); |
f9d7562f BF |
348 | file = find_any_file(stp->st_file); |
349 | if (file) | |
350 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
2283963f BF |
351 | free_generic_stateid(stp); |
352 | } | |
353 | ||
f044ff83 BF |
354 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
355 | { | |
356 | struct nfs4_stateid *stp; | |
357 | ||
358 | list_del(&sop->so_idhash); | |
359 | list_del(&sop->so_strhash); | |
360 | list_del(&sop->so_perstateid); | |
361 | while (!list_empty(&sop->so_stateids)) { | |
362 | stp = list_first_entry(&sop->so_stateids, | |
363 | struct nfs4_stateid, st_perstateowner); | |
364 | release_lock_stateid(stp); | |
365 | } | |
366 | } | |
367 | ||
368 | static void release_lockowner(struct nfs4_stateowner *sop) | |
369 | { | |
370 | unhash_lockowner(sop); | |
371 | nfs4_put_stateowner(sop); | |
372 | } | |
373 | ||
f1d110ca BF |
374 | static void |
375 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
376 | { | |
377 | struct nfs4_stateowner *lock_sop; | |
378 | ||
379 | while (!list_empty(&open_stp->st_lockowners)) { | |
380 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
381 | struct nfs4_stateowner, so_perstateid); | |
382 | /* list_del(&open_stp->st_lockowners); */ | |
383 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 384 | release_lockowner(lock_sop); |
f1d110ca BF |
385 | } |
386 | } | |
387 | ||
f9d7562f BF |
388 | /* |
389 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
390 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
391 | * only what share bits are currently in force, but also what | |
392 | * combinations of share bits previous opens have used. This allows us | |
393 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
394 | * return an error if the client attempt to downgrade to a combination | |
395 | * of share bits not explicable by closing some of its previous opens. | |
396 | * | |
397 | * XXX: This enforcement is actually incomplete, since we don't keep | |
398 | * track of access/deny bit combinations; so, e.g., we allow: | |
399 | * | |
400 | * OPEN allow read, deny write | |
401 | * OPEN allow both, deny none | |
402 | * DOWNGRADE allow read, deny none | |
403 | * | |
404 | * which we should reject. | |
405 | */ | |
406 | static void | |
407 | set_access(unsigned int *access, unsigned long bmap) { | |
408 | int i; | |
409 | ||
410 | *access = 0; | |
411 | for (i = 1; i < 4; i++) { | |
412 | if (test_bit(i, &bmap)) | |
413 | *access |= i; | |
414 | } | |
415 | } | |
416 | ||
417 | static void | |
418 | set_deny(unsigned int *deny, unsigned long bmap) { | |
419 | int i; | |
420 | ||
421 | *deny = 0; | |
422 | for (i = 0; i < 4; i++) { | |
423 | if (test_bit(i, &bmap)) | |
424 | *deny |= i ; | |
425 | } | |
426 | } | |
427 | ||
428 | static int | |
429 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
430 | unsigned int access, deny; | |
431 | ||
432 | set_access(&access, stp->st_access_bmap); | |
433 | set_deny(&deny, stp->st_deny_bmap); | |
434 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
435 | return 0; | |
436 | return 1; | |
437 | } | |
438 | ||
439 | static int nfs4_access_to_omode(u32 access) | |
440 | { | |
8f34a430 | 441 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
442 | case NFS4_SHARE_ACCESS_READ: |
443 | return O_RDONLY; | |
444 | case NFS4_SHARE_ACCESS_WRITE: | |
445 | return O_WRONLY; | |
446 | case NFS4_SHARE_ACCESS_BOTH: | |
447 | return O_RDWR; | |
448 | } | |
449 | BUG(); | |
450 | } | |
451 | ||
452 | static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) | |
453 | { | |
454 | unsigned int access; | |
455 | ||
456 | set_access(&access, stp->st_access_bmap); | |
457 | return nfs4_access_to_omode(access); | |
458 | } | |
459 | ||
2283963f BF |
460 | static void release_open_stateid(struct nfs4_stateid *stp) |
461 | { | |
f9d7562f BF |
462 | int oflag = nfs4_access_bmap_to_omode(stp); |
463 | ||
2283963f BF |
464 | unhash_generic_stateid(stp); |
465 | release_stateid_lockowners(stp); | |
f9d7562f | 466 | nfs4_file_put_access(stp->st_file, oflag); |
2283963f BF |
467 | free_generic_stateid(stp); |
468 | } | |
469 | ||
f044ff83 | 470 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
471 | { |
472 | struct nfs4_stateid *stp; | |
473 | ||
474 | list_del(&sop->so_idhash); | |
475 | list_del(&sop->so_strhash); | |
f044ff83 BF |
476 | list_del(&sop->so_perclient); |
477 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 478 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
479 | stp = list_first_entry(&sop->so_stateids, |
480 | struct nfs4_stateid, st_perstateowner); | |
481 | release_open_stateid(stp); | |
f1d110ca BF |
482 | } |
483 | } | |
484 | ||
f044ff83 | 485 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 486 | { |
f044ff83 | 487 | unhash_openowner(sop); |
f1d110ca BF |
488 | list_del(&sop->so_close_lru); |
489 | nfs4_put_stateowner(sop); | |
490 | } | |
491 | ||
5282fd72 ME |
492 | #define SESSION_HASH_SIZE 512 |
493 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
494 | ||
495 | static inline int | |
496 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
497 | { | |
498 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
499 | ||
500 | return sid->sequence % SESSION_HASH_SIZE; | |
501 | } | |
502 | ||
503 | static inline void | |
504 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
505 | { | |
506 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
507 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
508 | } | |
509 | ||
ec6b5d7b AA |
510 | static void |
511 | gen_sessionid(struct nfsd4_session *ses) | |
512 | { | |
513 | struct nfs4_client *clp = ses->se_client; | |
514 | struct nfsd4_sessionid *sid; | |
515 | ||
516 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
517 | sid->clientid = clp->cl_clientid; | |
518 | sid->sequence = current_sessionid++; | |
519 | sid->reserved = 0; | |
520 | } | |
521 | ||
522 | /* | |
a649637c AA |
523 | * The protocol defines ca_maxresponssize_cached to include the size of |
524 | * the rpc header, but all we need to cache is the data starting after | |
525 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
526 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
527 | * value that is the number of bytes in our cache plus a few additional | |
528 | * bytes. In order to stay on the safe side, and not promise more than | |
529 | * we can cache, those additional bytes must be the minimum possible: 24 | |
530 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
531 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
532 | * for the SEQUENCE op response: | |
533 | */ | |
534 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
535 | ||
557ce264 AA |
536 | static void |
537 | free_session_slots(struct nfsd4_session *ses) | |
538 | { | |
539 | int i; | |
540 | ||
541 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
542 | kfree(ses->se_slots[i]); | |
543 | } | |
544 | ||
efe0cb6d BF |
545 | /* |
546 | * We don't actually need to cache the rpc and session headers, so we | |
547 | * can allocate a little less for each slot: | |
548 | */ | |
549 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
550 | { | |
551 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
552 | } | |
553 | ||
5b6feee9 | 554 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 555 | { |
5b6feee9 BF |
556 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
557 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 558 | |
5b6feee9 BF |
559 | return size; |
560 | } | |
ec6b5d7b | 561 | |
5b6feee9 BF |
562 | /* |
563 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
564 | * re-negotiate active sessions and reduce their slot usage to make | |
565 | * rooom for new connections. For now we just fail the create session. | |
566 | */ | |
567 | static int nfsd4_get_drc_mem(int slotsize, u32 num) | |
568 | { | |
569 | int avail; | |
ec6b5d7b | 570 | |
5b6feee9 | 571 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
557ce264 | 572 | |
5b6feee9 BF |
573 | spin_lock(&nfsd_drc_lock); |
574 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
575 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
576 | num = min_t(int, num, avail / slotsize); | |
577 | nfsd_drc_mem_used += num * slotsize; | |
578 | spin_unlock(&nfsd_drc_lock); | |
579 | ||
580 | return num; | |
581 | } | |
582 | ||
583 | static void nfsd4_put_drc_mem(int slotsize, int num) | |
584 | { | |
585 | spin_lock(&nfsd_drc_lock); | |
586 | nfsd_drc_mem_used -= slotsize * num; | |
587 | spin_unlock(&nfsd_drc_lock); | |
588 | } | |
ec6b5d7b | 589 | |
5b6feee9 BF |
590 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
591 | { | |
592 | struct nfsd4_session *new; | |
593 | int mem, i; | |
594 | ||
595 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) | |
596 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
597 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 598 | |
5b6feee9 BF |
599 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
600 | if (!new) | |
601 | return NULL; | |
557ce264 | 602 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
603 | for (i = 0; i < numslots; i++) { |
604 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
605 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
606 | if (!new->se_slots[i]) | |
557ce264 | 607 | goto out_free; |
557ce264 | 608 | } |
5b6feee9 BF |
609 | return new; |
610 | out_free: | |
611 | while (i--) | |
612 | kfree(new->se_slots[i]); | |
613 | kfree(new); | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) | |
618 | { | |
619 | u32 maxrpc = nfsd_serv->sv_max_mesg; | |
620 | ||
621 | new->maxreqs = numslots; | |
622 | new->maxresp_cached = slotsize + NFSD_MIN_HDR_SEQ_SZ; | |
623 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); | |
624 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
625 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
626 | } | |
627 | ||
19cf5c02 BF |
628 | static void free_conn(struct nfsd4_conn *c) |
629 | { | |
630 | svc_xprt_put(c->cn_xprt); | |
631 | kfree(c); | |
632 | } | |
633 | ||
634 | static void nfsd4_conn_lost(struct svc_xpt_user *u) | |
635 | { | |
636 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
637 | struct nfs4_client *clp = c->cn_session->se_client; | |
638 | ||
639 | spin_lock(&clp->cl_lock); | |
640 | if (!list_empty(&c->cn_persession)) { | |
641 | list_del(&c->cn_persession); | |
642 | free_conn(c); | |
643 | } | |
644 | spin_unlock(&clp->cl_lock); | |
645 | } | |
646 | ||
d29c374c | 647 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 648 | { |
c7662518 BF |
649 | struct nfsd4_conn *conn; |
650 | ||
651 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); | |
652 | if (!conn) | |
db90681d | 653 | return NULL; |
c7662518 BF |
654 | svc_xprt_get(rqstp->rq_xprt); |
655 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 656 | conn->cn_flags = flags; |
db90681d BF |
657 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
658 | return conn; | |
659 | } | |
660 | ||
328ead28 BF |
661 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
662 | { | |
663 | conn->cn_session = ses; | |
664 | list_add(&conn->cn_persession, &ses->se_conns); | |
665 | } | |
666 | ||
db90681d BF |
667 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
668 | { | |
669 | struct nfs4_client *clp = ses->se_client; | |
c7662518 BF |
670 | |
671 | spin_lock(&clp->cl_lock); | |
328ead28 | 672 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 673 | spin_unlock(&clp->cl_lock); |
db90681d | 674 | } |
c7662518 | 675 | |
db90681d BF |
676 | static void nfsd4_register_conn(struct nfsd4_conn *conn) |
677 | { | |
19cf5c02 | 678 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
db90681d BF |
679 | register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
680 | } | |
681 | ||
682 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) | |
683 | { | |
684 | struct nfsd4_conn *conn; | |
d29c374c | 685 | u32 flags = NFS4_CDFC4_FORE; |
db90681d | 686 | |
d29c374c BF |
687 | if (ses->se_flags & SESSION4_BACK_CHAN) |
688 | flags |= NFS4_CDFC4_BACK; | |
689 | conn = alloc_conn(rqstp, flags); | |
db90681d BF |
690 | if (!conn) |
691 | return nfserr_jukebox; | |
692 | nfsd4_hash_conn(conn, ses); | |
693 | nfsd4_register_conn(conn); | |
c7662518 BF |
694 | return nfs_ok; |
695 | } | |
696 | ||
19cf5c02 | 697 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 698 | { |
19cf5c02 BF |
699 | struct nfs4_client *clp = s->se_client; |
700 | struct nfsd4_conn *c; | |
701 | ||
702 | spin_lock(&clp->cl_lock); | |
703 | while (!list_empty(&s->se_conns)) { | |
704 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
705 | list_del_init(&c->cn_persession); | |
706 | spin_unlock(&clp->cl_lock); | |
707 | ||
708 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); | |
709 | free_conn(c); | |
710 | ||
711 | spin_lock(&clp->cl_lock); | |
712 | } | |
713 | spin_unlock(&clp->cl_lock); | |
c7662518 BF |
714 | } |
715 | ||
716 | void free_session(struct kref *kref) | |
717 | { | |
718 | struct nfsd4_session *ses; | |
719 | int mem; | |
720 | ||
721 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 722 | nfsd4_del_conns(ses); |
c7662518 BF |
723 | spin_lock(&nfsd_drc_lock); |
724 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
725 | nfsd_drc_mem_used -= mem; | |
726 | spin_unlock(&nfsd_drc_lock); | |
727 | free_session_slots(ses); | |
728 | kfree(ses); | |
729 | } | |
730 | ||
ac7c46f2 | 731 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
732 | { |
733 | struct nfsd4_session *new; | |
734 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
735 | int numslots, slotsize; | |
c7662518 | 736 | int status; |
5b6feee9 BF |
737 | int idx; |
738 | ||
739 | /* | |
740 | * Note decreasing slot size below client's request may | |
741 | * make it difficult for client to function correctly, whereas | |
742 | * decreasing the number of slots will (just?) affect | |
743 | * performance. When short on memory we therefore prefer to | |
744 | * decrease number of slots instead of their size. | |
745 | */ | |
746 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
747 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
748 | ||
749 | new = alloc_session(slotsize, numslots); | |
750 | if (!new) { | |
751 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 752 | return NULL; |
5b6feee9 BF |
753 | } |
754 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); | |
557ce264 | 755 | |
ec6b5d7b AA |
756 | new->se_client = clp; |
757 | gen_sessionid(new); | |
ec6b5d7b | 758 | |
c7662518 BF |
759 | INIT_LIST_HEAD(&new->se_conns); |
760 | ||
ac7c46f2 | 761 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 762 | new->se_flags = cses->flags; |
8b5ce5cd | 763 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 764 | kref_init(&new->se_ref); |
5b6feee9 | 765 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 766 | spin_lock(&client_lock); |
ec6b5d7b AA |
767 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
768 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
9089f1b4 | 769 | spin_unlock(&client_lock); |
ec6b5d7b | 770 | |
c7662518 | 771 | status = nfsd4_new_conn(rqstp, new); |
ac7c46f2 | 772 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
773 | if (status) { |
774 | free_session(&new->se_ref); | |
ac7c46f2 | 775 | return NULL; |
c7662518 | 776 | } |
edd76786 BF |
777 | if (!clp->cl_cb_session && (cses->flags & SESSION4_BACK_CHAN)) { |
778 | struct sockaddr *sa = svc_addr(rqstp); | |
779 | ||
780 | clp->cl_cb_session = new; | |
781 | clp->cl_cb_conn.cb_xprt = rqstp->rq_xprt; | |
782 | svc_xprt_get(rqstp->rq_xprt); | |
783 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); | |
784 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
785 | clp->cl_cb_conn.cb_minorversion = 1; | |
5a3c9d71 | 786 | nfsd4_probe_callback(clp); |
edd76786 | 787 | } |
ac7c46f2 | 788 | return new; |
ec6b5d7b AA |
789 | } |
790 | ||
9089f1b4 | 791 | /* caller must hold client_lock */ |
5282fd72 ME |
792 | static struct nfsd4_session * |
793 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
794 | { | |
795 | struct nfsd4_session *elem; | |
796 | int idx; | |
797 | ||
798 | dump_sessionid(__func__, sessionid); | |
799 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
800 | /* Search in the appropriate list */ |
801 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
802 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
803 | NFS4_MAX_SESSIONID_LEN)) { | |
804 | return elem; | |
805 | } | |
806 | } | |
807 | ||
808 | dprintk("%s: session not found\n", __func__); | |
809 | return NULL; | |
810 | } | |
811 | ||
9089f1b4 | 812 | /* caller must hold client_lock */ |
7116ed6b | 813 | static void |
5282fd72 | 814 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
815 | { |
816 | list_del(&ses->se_hash); | |
817 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
818 | } |
819 | ||
36acb66b | 820 | /* must be called under the client_lock */ |
1da177e4 | 821 | static inline void |
36acb66b | 822 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 823 | { |
07cd4909 BH |
824 | if (is_client_expired(clp)) { |
825 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
826 | __func__, | |
827 | clp->cl_clientid.cl_boot, | |
828 | clp->cl_clientid.cl_id); | |
829 | return; | |
830 | } | |
831 | ||
1da177e4 LT |
832 | /* |
833 | * Move client to the end to the LRU list. | |
834 | */ | |
835 | dprintk("renewing client (clientid %08x/%08x)\n", | |
836 | clp->cl_clientid.cl_boot, | |
837 | clp->cl_clientid.cl_id); | |
838 | list_move_tail(&clp->cl_lru, &client_lru); | |
839 | clp->cl_time = get_seconds(); | |
840 | } | |
841 | ||
36acb66b BH |
842 | static inline void |
843 | renew_client(struct nfs4_client *clp) | |
844 | { | |
845 | spin_lock(&client_lock); | |
846 | renew_client_locked(clp); | |
847 | spin_unlock(&client_lock); | |
848 | } | |
849 | ||
1da177e4 LT |
850 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
851 | static int | |
852 | STALE_CLIENTID(clientid_t *clid) | |
853 | { | |
854 | if (clid->cl_boot == boot_time) | |
855 | return 0; | |
60adfc50 AA |
856 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
857 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
858 | return 1; |
859 | } | |
860 | ||
861 | /* | |
862 | * XXX Should we use a slab cache ? | |
863 | * This type of memory management is somewhat inefficient, but we use it | |
864 | * anyway since SETCLIENTID is not a common operation. | |
865 | */ | |
35bba9a3 | 866 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
867 | { |
868 | struct nfs4_client *clp; | |
869 | ||
35bba9a3 BF |
870 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
871 | if (clp == NULL) | |
872 | return NULL; | |
873 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
874 | if (clp->cl_name.data == NULL) { | |
875 | kfree(clp); | |
876 | return NULL; | |
1da177e4 | 877 | } |
35bba9a3 BF |
878 | memcpy(clp->cl_name.data, name.data, name.len); |
879 | clp->cl_name.len = name.len; | |
1da177e4 LT |
880 | return clp; |
881 | } | |
882 | ||
883 | static inline void | |
884 | free_client(struct nfs4_client *clp) | |
885 | { | |
792c95dd BF |
886 | while (!list_empty(&clp->cl_sessions)) { |
887 | struct nfsd4_session *ses; | |
888 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
889 | se_perclnt); | |
890 | list_del(&ses->se_perclnt); | |
891 | nfsd4_put_session(ses); | |
892 | } | |
1da177e4 LT |
893 | if (clp->cl_cred.cr_group_info) |
894 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 895 | kfree(clp->cl_principal); |
1da177e4 LT |
896 | kfree(clp->cl_name.data); |
897 | kfree(clp); | |
898 | } | |
899 | ||
d7682988 BH |
900 | void |
901 | release_session_client(struct nfsd4_session *session) | |
902 | { | |
903 | struct nfs4_client *clp = session->se_client; | |
904 | ||
905 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
906 | return; | |
907 | if (is_client_expired(clp)) { | |
908 | free_client(clp); | |
909 | session->se_client = NULL; | |
910 | } else | |
911 | renew_client_locked(clp); | |
912 | spin_unlock(&client_lock); | |
d7682988 BH |
913 | } |
914 | ||
84d38ac9 BH |
915 | /* must be called under the client_lock */ |
916 | static inline void | |
917 | unhash_client_locked(struct nfs4_client *clp) | |
918 | { | |
792c95dd BF |
919 | struct nfsd4_session *ses; |
920 | ||
07cd4909 | 921 | mark_client_expired(clp); |
84d38ac9 | 922 | list_del(&clp->cl_lru); |
792c95dd BF |
923 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
924 | list_del_init(&ses->se_hash); | |
84d38ac9 BH |
925 | } |
926 | ||
1da177e4 LT |
927 | static void |
928 | expire_client(struct nfs4_client *clp) | |
929 | { | |
930 | struct nfs4_stateowner *sop; | |
931 | struct nfs4_delegation *dp; | |
1da177e4 LT |
932 | struct list_head reaplist; |
933 | ||
1da177e4 LT |
934 | INIT_LIST_HEAD(&reaplist); |
935 | spin_lock(&recall_lock); | |
ea1da636 N |
936 | while (!list_empty(&clp->cl_delegations)) { |
937 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
938 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
939 | dp->dl_flock); | |
ea1da636 | 940 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
941 | list_move(&dp->dl_recall_lru, &reaplist); |
942 | } | |
943 | spin_unlock(&recall_lock); | |
944 | while (!list_empty(&reaplist)) { | |
945 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
946 | list_del_init(&dp->dl_recall_lru); | |
947 | unhash_delegation(dp); | |
948 | } | |
ea1da636 N |
949 | while (!list_empty(&clp->cl_openowners)) { |
950 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 951 | release_openowner(sop); |
1da177e4 | 952 | } |
6ff8da08 | 953 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
954 | if (clp->cl_cb_conn.cb_xprt) |
955 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
956 | list_del(&clp->cl_idhash); |
957 | list_del(&clp->cl_strhash); | |
be1fdf6c | 958 | spin_lock(&client_lock); |
84d38ac9 | 959 | unhash_client_locked(clp); |
46583e25 BH |
960 | if (atomic_read(&clp->cl_refcount) == 0) |
961 | free_client(clp); | |
be1fdf6c | 962 | spin_unlock(&client_lock); |
1da177e4 LT |
963 | } |
964 | ||
35bba9a3 BF |
965 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
966 | { | |
967 | memcpy(target->cl_verifier.data, source->data, | |
968 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
969 | } |
970 | ||
35bba9a3 BF |
971 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
972 | { | |
1da177e4 LT |
973 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
974 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
975 | } | |
976 | ||
35bba9a3 BF |
977 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
978 | { | |
1da177e4 LT |
979 | target->cr_uid = source->cr_uid; |
980 | target->cr_gid = source->cr_gid; | |
981 | target->cr_group_info = source->cr_group_info; | |
982 | get_group_info(target->cr_group_info); | |
983 | } | |
984 | ||
35bba9a3 | 985 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 986 | { |
a55370a3 | 987 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
988 | } |
989 | ||
990 | static int | |
599e0a22 BF |
991 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
992 | { | |
993 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
994 | } |
995 | ||
996 | static int | |
599e0a22 BF |
997 | same_clid(clientid_t *cl1, clientid_t *cl2) |
998 | { | |
999 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | /* XXX what about NGROUP */ | |
1003 | static int | |
599e0a22 BF |
1004 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1005 | { | |
1006 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1007 | } |
1008 | ||
5ec7b46c BF |
1009 | static void gen_clid(struct nfs4_client *clp) |
1010 | { | |
1011 | static u32 current_clientid = 1; | |
1012 | ||
1da177e4 LT |
1013 | clp->cl_clientid.cl_boot = boot_time; |
1014 | clp->cl_clientid.cl_id = current_clientid++; | |
1015 | } | |
1016 | ||
deda2faa BF |
1017 | static void gen_confirm(struct nfs4_client *clp) |
1018 | { | |
1019 | static u32 i; | |
1020 | u32 *p; | |
1da177e4 | 1021 | |
1da177e4 | 1022 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1023 | *p++ = get_seconds(); |
1024 | *p++ = i++; | |
1da177e4 LT |
1025 | } |
1026 | ||
b09333c4 RL |
1027 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1028 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1029 | { | |
1030 | struct nfs4_client *clp; | |
1031 | struct sockaddr *sa = svc_addr(rqstp); | |
1032 | char *princ; | |
1033 | ||
1034 | clp = alloc_client(name); | |
1035 | if (clp == NULL) | |
1036 | return NULL; | |
1037 | ||
792c95dd BF |
1038 | INIT_LIST_HEAD(&clp->cl_sessions); |
1039 | ||
b09333c4 RL |
1040 | princ = svc_gss_principal(rqstp); |
1041 | if (princ) { | |
1042 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1043 | if (clp->cl_principal == NULL) { | |
1044 | free_client(clp); | |
1045 | return NULL; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1050 | atomic_set(&clp->cl_refcount, 0); |
2bf23875 | 1051 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
1052 | INIT_LIST_HEAD(&clp->cl_idhash); |
1053 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1054 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1055 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1056 | INIT_LIST_HEAD(&clp->cl_lru); |
6ff8da08 | 1057 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1058 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1059 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1060 | clear_bit(0, &clp->cl_cb_slot_busy); |
1061 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1062 | copy_verf(clp, verf); | |
1063 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1064 | clp->cl_flavor = rqstp->rq_flavor; | |
1065 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1066 | gen_confirm(clp); | |
edd76786 | 1067 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1068 | return clp; |
1069 | } | |
1070 | ||
35bba9a3 BF |
1071 | static int check_name(struct xdr_netobj name) |
1072 | { | |
1da177e4 LT |
1073 | if (name.len == 0) |
1074 | return 0; | |
1075 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1076 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1077 | return 0; |
1078 | } | |
1079 | return 1; | |
1080 | } | |
1081 | ||
fd39ca9a | 1082 | static void |
1da177e4 LT |
1083 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1084 | { | |
1085 | unsigned int idhashval; | |
1086 | ||
1087 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1088 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1089 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1090 | renew_client(clp); |
1da177e4 LT |
1091 | } |
1092 | ||
fd39ca9a | 1093 | static void |
1da177e4 LT |
1094 | move_to_confirmed(struct nfs4_client *clp) |
1095 | { | |
1096 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1097 | unsigned int strhashval; | |
1098 | ||
1099 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1100 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1101 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1102 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1103 | renew_client(clp); |
1104 | } | |
1105 | ||
1106 | static struct nfs4_client * | |
1107 | find_confirmed_client(clientid_t *clid) | |
1108 | { | |
1109 | struct nfs4_client *clp; | |
1110 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1111 | ||
1112 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1113 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1114 | return clp; |
1115 | } | |
1116 | return NULL; | |
1117 | } | |
1118 | ||
1119 | static struct nfs4_client * | |
1120 | find_unconfirmed_client(clientid_t *clid) | |
1121 | { | |
1122 | struct nfs4_client *clp; | |
1123 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1124 | ||
1125 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1126 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1127 | return clp; |
1128 | } | |
1129 | return NULL; | |
1130 | } | |
1131 | ||
a1bcecd2 AA |
1132 | /* |
1133 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
1134 | * parameter. Matching is based on the fact the at least one of the | |
1135 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
1136 | * | |
1137 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
1138 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
1139 | * and SET_CLIENTID{,_CONFIRM} | |
1140 | */ | |
1141 | static inline int | |
1142 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
1143 | { | |
1144 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
1145 | return use_exchange_id == has_exchange_flags; | |
1146 | } | |
1147 | ||
28ce6054 | 1148 | static struct nfs4_client * |
a1bcecd2 AA |
1149 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
1150 | bool use_exchange_id) | |
28ce6054 N |
1151 | { |
1152 | struct nfs4_client *clp; | |
1153 | ||
1154 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
1155 | if (same_name(clp->cl_recdir, dname) && |
1156 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
1157 | return clp; |
1158 | } | |
1159 | return NULL; | |
1160 | } | |
1161 | ||
1162 | static struct nfs4_client * | |
a1bcecd2 AA |
1163 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
1164 | bool use_exchange_id) | |
28ce6054 N |
1165 | { |
1166 | struct nfs4_client *clp; | |
1167 | ||
1168 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
1169 | if (same_name(clp->cl_recdir, dname) && |
1170 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
1171 | return clp; |
1172 | } | |
1173 | return NULL; | |
1174 | } | |
1175 | ||
fd39ca9a | 1176 | static void |
fbf4665f | 1177 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 1178 | { |
07263f1e | 1179 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
7077ecba JL |
1180 | unsigned short expected_family; |
1181 | ||
1182 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1183 | if (se->se_callback_netid_len == 3 && | |
1184 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1185 | expected_family = AF_INET; | |
1186 | else if (se->se_callback_netid_len == 4 && | |
1187 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1188 | expected_family = AF_INET6; | |
1189 | else | |
1da177e4 LT |
1190 | goto out_err; |
1191 | ||
07263f1e | 1192 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1193 | se->se_callback_addr_len, |
07263f1e BF |
1194 | (struct sockaddr *)&conn->cb_addr, |
1195 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1196 | |
07263f1e | 1197 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1198 | goto out_err; |
aa9a4ec7 | 1199 | |
07263f1e BF |
1200 | if (conn->cb_addr.ss_family == AF_INET6) |
1201 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1202 | |
07263f1e BF |
1203 | conn->cb_minorversion = 0; |
1204 | conn->cb_prog = se->se_callback_prog; | |
1205 | conn->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
1206 | return; |
1207 | out_err: | |
07263f1e BF |
1208 | conn->cb_addr.ss_family = AF_UNSPEC; |
1209 | conn->cb_addrlen = 0; | |
849823c5 | 1210 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1211 | "will not receive delegations\n", |
1212 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1213 | ||
1da177e4 LT |
1214 | return; |
1215 | } | |
1216 | ||
074fe897 | 1217 | /* |
557ce264 | 1218 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1219 | */ |
074fe897 AA |
1220 | void |
1221 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1222 | { |
557ce264 AA |
1223 | struct nfsd4_slot *slot = resp->cstate.slot; |
1224 | unsigned int base; | |
074fe897 | 1225 | |
557ce264 | 1226 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1227 | |
557ce264 AA |
1228 | slot->sl_opcnt = resp->opcnt; |
1229 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1230 | |
bf864a31 | 1231 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1232 | slot->sl_datalen = 0; |
bf864a31 | 1233 | return; |
074fe897 | 1234 | } |
557ce264 AA |
1235 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1236 | base = (char *)resp->cstate.datap - | |
1237 | (char *)resp->xbuf->head[0].iov_base; | |
1238 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1239 | slot->sl_datalen)) | |
1240 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1241 | return; | |
074fe897 AA |
1242 | } |
1243 | ||
1244 | /* | |
abfabf8c AA |
1245 | * Encode the replay sequence operation from the slot values. |
1246 | * If cachethis is FALSE encode the uncached rep error on the next | |
1247 | * operation which sets resp->p and increments resp->opcnt for | |
1248 | * nfs4svc_encode_compoundres. | |
074fe897 | 1249 | * |
074fe897 | 1250 | */ |
abfabf8c AA |
1251 | static __be32 |
1252 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1253 | struct nfsd4_compoundres *resp) | |
074fe897 | 1254 | { |
abfabf8c AA |
1255 | struct nfsd4_op *op; |
1256 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1257 | |
abfabf8c | 1258 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1259 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1260 | |
abfabf8c AA |
1261 | /* Encode the replayed sequence operation */ |
1262 | op = &args->ops[resp->opcnt - 1]; | |
1263 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1264 | |
abfabf8c | 1265 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1266 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1267 | op = &args->ops[resp->opcnt++]; |
1268 | op->status = nfserr_retry_uncached_rep; | |
1269 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1270 | } |
abfabf8c | 1271 | return op->status; |
074fe897 AA |
1272 | } |
1273 | ||
1274 | /* | |
557ce264 AA |
1275 | * The sequence operation is not cached because we can use the slot and |
1276 | * session values. | |
074fe897 AA |
1277 | */ |
1278 | __be32 | |
bf864a31 AA |
1279 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1280 | struct nfsd4_sequence *seq) | |
074fe897 | 1281 | { |
557ce264 | 1282 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1283 | __be32 status; |
1284 | ||
557ce264 | 1285 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1286 | |
abfabf8c AA |
1287 | /* Either returns 0 or nfserr_retry_uncached */ |
1288 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1289 | if (status == nfserr_retry_uncached_rep) | |
1290 | return status; | |
074fe897 | 1291 | |
557ce264 AA |
1292 | /* The sequence operation has been encoded, cstate->datap set. */ |
1293 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1294 | |
557ce264 AA |
1295 | resp->opcnt = slot->sl_opcnt; |
1296 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1297 | status = slot->sl_status; | |
074fe897 AA |
1298 | |
1299 | return status; | |
1300 | } | |
1301 | ||
0733d213 AA |
1302 | /* |
1303 | * Set the exchange_id flags returned by the server. | |
1304 | */ | |
1305 | static void | |
1306 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1307 | { | |
1308 | /* pNFS is not supported */ | |
1309 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1310 | ||
1311 | /* Referrals are supported, Migration is not. */ | |
1312 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1313 | ||
1314 | /* set the wire flags to return to client. */ | |
1315 | clid->flags = new->cl_exchange_flags; | |
1316 | } | |
1317 | ||
069b6ad4 AA |
1318 | __be32 |
1319 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1320 | struct nfsd4_compound_state *cstate, | |
1321 | struct nfsd4_exchange_id *exid) | |
1322 | { | |
0733d213 AA |
1323 | struct nfs4_client *unconf, *conf, *new; |
1324 | int status; | |
1325 | unsigned int strhashval; | |
1326 | char dname[HEXDIR_LEN]; | |
363168b4 | 1327 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1328 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1329 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1330 | |
363168b4 | 1331 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1332 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1333 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1334 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1335 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1336 | |
1337 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1338 | return nfserr_inval; | |
1339 | ||
1340 | /* Currently only support SP4_NONE */ | |
1341 | switch (exid->spa_how) { | |
1342 | case SP4_NONE: | |
1343 | break; | |
1344 | case SP4_SSV: | |
1345 | return nfserr_encr_alg_unsupp; | |
1346 | default: | |
1347 | BUG(); /* checked by xdr code */ | |
1348 | case SP4_MACH_CRED: | |
1349 | return nfserr_serverfault; /* no excuse :-/ */ | |
1350 | } | |
1351 | ||
1352 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1353 | ||
1354 | if (status) | |
1355 | goto error; | |
1356 | ||
1357 | strhashval = clientstr_hashval(dname); | |
1358 | ||
1359 | nfs4_lock_state(); | |
1360 | status = nfs_ok; | |
1361 | ||
a1bcecd2 | 1362 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1363 | if (conf) { |
1364 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1365 | /* 18.35.4 case 8 */ | |
1366 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1367 | status = nfserr_not_same; | |
1368 | goto out; | |
1369 | } | |
1370 | /* Client reboot: destroy old state */ | |
1371 | expire_client(conf); | |
1372 | goto out_new; | |
1373 | } | |
1374 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1375 | /* 18.35.4 case 9 */ | |
1376 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1377 | status = nfserr_perm; | |
1378 | goto out; | |
1379 | } | |
1380 | expire_client(conf); | |
1381 | goto out_new; | |
1382 | } | |
0733d213 AA |
1383 | /* |
1384 | * Set bit when the owner id and verifier map to an already | |
1385 | * confirmed client id (18.35.3). | |
1386 | */ | |
1387 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1388 | ||
1389 | /* | |
1390 | * Falling into 18.35.4 case 2, possible router replay. | |
1391 | * Leave confirmed record intact and return same result. | |
1392 | */ | |
1393 | copy_verf(conf, &verf); | |
1394 | new = conf; | |
1395 | goto out_copy; | |
6ddbbbfe MS |
1396 | } |
1397 | ||
1398 | /* 18.35.4 case 7 */ | |
1399 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1400 | status = nfserr_noent; | |
1401 | goto out; | |
0733d213 AA |
1402 | } |
1403 | ||
a1bcecd2 | 1404 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1405 | if (unconf) { |
1406 | /* | |
1407 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1408 | * a new unconfirmed record should be generated regardless | |
1409 | * of whether any properties have changed. | |
1410 | */ | |
1411 | expire_client(unconf); | |
1412 | } | |
1413 | ||
1414 | out_new: | |
1415 | /* Normal case */ | |
b09333c4 | 1416 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1417 | if (new == NULL) { |
4731030d | 1418 | status = nfserr_jukebox; |
0733d213 AA |
1419 | goto out; |
1420 | } | |
1421 | ||
0733d213 | 1422 | gen_clid(new); |
0733d213 AA |
1423 | add_to_unconfirmed(new, strhashval); |
1424 | out_copy: | |
1425 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1426 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1427 | ||
38eb76a5 | 1428 | exid->seqid = 1; |
0733d213 AA |
1429 | nfsd4_set_ex_flags(new, exid); |
1430 | ||
1431 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1432 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1433 | status = nfs_ok; |
1434 | ||
1435 | out: | |
1436 | nfs4_unlock_state(); | |
1437 | error: | |
1438 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1439 | return status; | |
069b6ad4 AA |
1440 | } |
1441 | ||
b85d4c01 | 1442 | static int |
88e588d5 | 1443 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1444 | { |
88e588d5 AA |
1445 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1446 | slot_seqid); | |
b85d4c01 BH |
1447 | |
1448 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1449 | if (slot_inuse) { |
1450 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1451 | return nfserr_jukebox; |
1452 | else | |
1453 | return nfserr_seq_misordered; | |
1454 | } | |
1455 | /* Normal */ | |
88e588d5 | 1456 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1457 | return nfs_ok; |
1458 | /* Replay */ | |
88e588d5 | 1459 | if (seqid == slot_seqid) |
b85d4c01 BH |
1460 | return nfserr_replay_cache; |
1461 | /* Wraparound */ | |
88e588d5 | 1462 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1463 | return nfs_ok; |
1464 | /* Misordered replay or misordered new request */ | |
1465 | return nfserr_seq_misordered; | |
1466 | } | |
1467 | ||
49557cc7 AA |
1468 | /* |
1469 | * Cache the create session result into the create session single DRC | |
1470 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1471 | * Do this for solo or embedded create session operations. | |
1472 | */ | |
1473 | static void | |
1474 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1475 | struct nfsd4_clid_slot *slot, int nfserr) | |
1476 | { | |
1477 | slot->sl_status = nfserr; | |
1478 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1479 | } | |
1480 | ||
1481 | static __be32 | |
1482 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1483 | struct nfsd4_clid_slot *slot) | |
1484 | { | |
1485 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1486 | return slot->sl_status; | |
1487 | } | |
1488 | ||
069b6ad4 AA |
1489 | __be32 |
1490 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1491 | struct nfsd4_compound_state *cstate, | |
1492 | struct nfsd4_create_session *cr_ses) | |
1493 | { | |
363168b4 | 1494 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1495 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1496 | struct nfsd4_session *new; |
49557cc7 | 1497 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1498 | bool confirm_me = false; |
ec6b5d7b AA |
1499 | int status = 0; |
1500 | ||
1501 | nfs4_lock_state(); | |
1502 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1503 | conf = find_confirmed_client(&cr_ses->clientid); | |
1504 | ||
1505 | if (conf) { | |
49557cc7 AA |
1506 | cs_slot = &conf->cl_cs_slot; |
1507 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1508 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1509 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1510 | cs_slot->sl_seqid); |
38eb76a5 | 1511 | /* Return the cached reply status */ |
49557cc7 | 1512 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1513 | goto out; |
49557cc7 | 1514 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1515 | status = nfserr_seq_misordered; |
1516 | dprintk("Sequence misordered!\n"); | |
1517 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1518 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1519 | goto out; |
1520 | } | |
ec6b5d7b AA |
1521 | } else if (unconf) { |
1522 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1523 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1524 | status = nfserr_clid_inuse; |
1525 | goto out; | |
1526 | } | |
1527 | ||
49557cc7 AA |
1528 | cs_slot = &unconf->cl_cs_slot; |
1529 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1530 | if (status) { |
1531 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1532 | status = nfserr_seq_misordered; |
cd5b8144 | 1533 | goto out; |
ec6b5d7b AA |
1534 | } |
1535 | ||
86c3e16c | 1536 | confirm_me = true; |
ec6b5d7b AA |
1537 | conf = unconf; |
1538 | } else { | |
1539 | status = nfserr_stale_clientid; | |
1540 | goto out; | |
1541 | } | |
1542 | ||
408b79bc BF |
1543 | /* |
1544 | * We do not support RDMA or persistent sessions | |
1545 | */ | |
1546 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1547 | cr_ses->flags &= ~SESSION4_RDMA; | |
1548 | ||
ac7c46f2 BF |
1549 | status = nfserr_jukebox; |
1550 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1551 | if (!new) | |
ec6b5d7b | 1552 | goto out; |
ac7c46f2 BF |
1553 | status = nfs_ok; |
1554 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1555 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 1556 | cs_slot->sl_seqid++; |
49557cc7 | 1557 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1558 | |
49557cc7 AA |
1559 | /* cache solo and embedded create sessions under the state lock */ |
1560 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1561 | if (confirm_me) |
1562 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1563 | out: |
1564 | nfs4_unlock_state(); | |
1565 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1566 | return status; | |
069b6ad4 AA |
1567 | } |
1568 | ||
57716355 BF |
1569 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1570 | { | |
1571 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1572 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1573 | ||
1574 | return argp->opcnt == resp->opcnt; | |
1575 | } | |
1576 | ||
5d4cec2f BF |
1577 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1578 | { | |
1579 | if (!session) | |
1580 | return 0; | |
1581 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1582 | } | |
1583 | ||
069b6ad4 AA |
1584 | __be32 |
1585 | nfsd4_destroy_session(struct svc_rqst *r, | |
1586 | struct nfsd4_compound_state *cstate, | |
1587 | struct nfsd4_destroy_session *sessionid) | |
1588 | { | |
e10e0cfc BH |
1589 | struct nfsd4_session *ses; |
1590 | u32 status = nfserr_badsession; | |
1591 | ||
1592 | /* Notes: | |
1593 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1594 | * - Should we return nfserr_back_chan_busy if waiting for | |
1595 | * callbacks on to-be-destroyed session? | |
1596 | * - Do we need to clear any callback info from previous session? | |
1597 | */ | |
1598 | ||
5d4cec2f | 1599 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1600 | if (!nfsd4_last_compound_op(r)) |
1601 | return nfserr_not_only_op; | |
1602 | } | |
e10e0cfc | 1603 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1604 | spin_lock(&client_lock); |
e10e0cfc BH |
1605 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1606 | if (!ses) { | |
9089f1b4 | 1607 | spin_unlock(&client_lock); |
e10e0cfc BH |
1608 | goto out; |
1609 | } | |
1610 | ||
1611 | unhash_session(ses); | |
9089f1b4 | 1612 | spin_unlock(&client_lock); |
e10e0cfc | 1613 | |
ab707e15 | 1614 | nfs4_lock_state(); |
e10e0cfc | 1615 | /* wait for callbacks */ |
6ff8da08 | 1616 | nfsd4_shutdown_callback(ses->se_client); |
ab707e15 | 1617 | nfs4_unlock_state(); |
19cf5c02 BF |
1618 | |
1619 | nfsd4_del_conns(ses); | |
1620 | ||
e10e0cfc BH |
1621 | nfsd4_put_session(ses); |
1622 | status = nfs_ok; | |
1623 | out: | |
1624 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1625 | return status; | |
069b6ad4 AA |
1626 | } |
1627 | ||
328ead28 BF |
1628 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_rqst *r, struct nfsd4_session *s) |
1629 | { | |
1630 | struct nfsd4_conn *c; | |
1631 | ||
1632 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
1633 | if (c->cn_xprt == r->rq_xprt) { | |
1634 | return c; | |
1635 | } | |
1636 | } | |
1637 | return NULL; | |
1638 | } | |
1639 | ||
1640 | static void nfsd4_sequence_check_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) | |
1641 | { | |
1642 | struct nfs4_client *clp = ses->se_client; | |
1643 | struct nfsd4_conn *c, *new = NULL; | |
1644 | ||
1645 | spin_lock(&clp->cl_lock); | |
1646 | c = __nfsd4_find_conn(rqstp, ses); | |
1647 | spin_unlock(&clp->cl_lock); | |
1648 | if (c) | |
1649 | return; | |
1650 | ||
d29c374c | 1651 | new = alloc_conn(rqstp, NFS4_CDFC4_FORE); |
328ead28 BF |
1652 | |
1653 | spin_lock(&clp->cl_lock); | |
1654 | c = __nfsd4_find_conn(rqstp, ses); | |
1655 | if (c) { | |
1656 | spin_unlock(&clp->cl_lock); | |
1657 | free_conn(new); | |
1658 | return; | |
1659 | } | |
1660 | __nfsd4_hash_conn(new, ses); | |
1661 | spin_unlock(&clp->cl_lock); | |
1662 | nfsd4_register_conn(new); | |
1663 | return; | |
1664 | } | |
1665 | ||
069b6ad4 | 1666 | __be32 |
b85d4c01 | 1667 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1668 | struct nfsd4_compound_state *cstate, |
1669 | struct nfsd4_sequence *seq) | |
1670 | { | |
f9bb94c4 | 1671 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1672 | struct nfsd4_session *session; |
1673 | struct nfsd4_slot *slot; | |
1674 | int status; | |
1675 | ||
f9bb94c4 AA |
1676 | if (resp->opcnt != 1) |
1677 | return nfserr_sequence_pos; | |
1678 | ||
9089f1b4 | 1679 | spin_lock(&client_lock); |
b85d4c01 BH |
1680 | status = nfserr_badsession; |
1681 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1682 | if (!session) | |
1683 | goto out; | |
1684 | ||
1685 | status = nfserr_badslot; | |
6c18ba9f | 1686 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1687 | goto out; |
1688 | ||
557ce264 | 1689 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1690 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1691 | ||
a8dfdaeb AA |
1692 | /* We do not negotiate the number of slots yet, so set the |
1693 | * maxslots to the session maxreqs which is used to encode | |
1694 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1695 | seq->maxslots = session->se_fchannel.maxreqs; | |
1696 | ||
88e588d5 | 1697 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1698 | if (status == nfserr_replay_cache) { |
1699 | cstate->slot = slot; | |
1700 | cstate->session = session; | |
da3846a2 | 1701 | /* Return the cached reply status and set cstate->status |
557ce264 | 1702 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1703 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1704 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1705 | goto out; |
b85d4c01 BH |
1706 | } |
1707 | if (status) | |
1708 | goto out; | |
1709 | ||
328ead28 BF |
1710 | nfsd4_sequence_check_conn(rqstp, session); |
1711 | ||
b85d4c01 BH |
1712 | /* Success! bump slot seqid */ |
1713 | slot->sl_inuse = true; | |
1714 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1715 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1716 | |
1717 | cstate->slot = slot; | |
1718 | cstate->session = session; | |
1719 | ||
b85d4c01 | 1720 | out: |
26c0c75e | 1721 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1722 | if (cstate->session) { |
36acb66b | 1723 | nfsd4_get_session(cstate->session); |
d7682988 | 1724 | atomic_inc(&session->se_client->cl_refcount); |
aaf84eb9 | 1725 | } |
36acb66b | 1726 | spin_unlock(&client_lock); |
b85d4c01 BH |
1727 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1728 | return status; | |
069b6ad4 AA |
1729 | } |
1730 | ||
4dc6ec00 BF |
1731 | __be32 |
1732 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1733 | { | |
1734 | if (rc->rca_one_fs) { | |
1735 | if (!cstate->current_fh.fh_dentry) | |
1736 | return nfserr_nofilehandle; | |
1737 | /* | |
1738 | * We don't take advantage of the rca_one_fs case. | |
1739 | * That's OK, it's optional, we can safely ignore it. | |
1740 | */ | |
1741 | return nfs_ok; | |
1742 | } | |
1743 | nfs4_lock_state(); | |
1744 | if (is_client_expired(cstate->session->se_client)) { | |
1745 | nfs4_unlock_state(); | |
1746 | /* | |
1747 | * The following error isn't really legal. | |
1748 | * But we only get here if the client just explicitly | |
1749 | * destroyed the client. Surely it no longer cares what | |
1750 | * error it gets back on an operation for the dead | |
1751 | * client. | |
1752 | */ | |
1753 | return nfserr_stale_clientid; | |
1754 | } | |
1755 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1756 | nfs4_unlock_state(); | |
1757 | return nfs_ok; | |
1758 | } | |
1759 | ||
b37ad28b | 1760 | __be32 |
b591480b BF |
1761 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1762 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1763 | { |
363168b4 | 1764 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1765 | struct xdr_netobj clname = { |
1766 | .len = setclid->se_namelen, | |
1767 | .data = setclid->se_name, | |
1768 | }; | |
1769 | nfs4_verifier clverifier = setclid->se_verf; | |
1770 | unsigned int strhashval; | |
28ce6054 | 1771 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1772 | __be32 status; |
a55370a3 | 1773 | char dname[HEXDIR_LEN]; |
1da177e4 | 1774 | |
1da177e4 | 1775 | if (!check_name(clname)) |
73aea4ec | 1776 | return nfserr_inval; |
1da177e4 | 1777 | |
a55370a3 N |
1778 | status = nfs4_make_rec_clidname(dname, &clname); |
1779 | if (status) | |
73aea4ec | 1780 | return status; |
a55370a3 | 1781 | |
1da177e4 LT |
1782 | /* |
1783 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1784 | * We get here on a DRC miss. | |
1785 | */ | |
1786 | ||
a55370a3 | 1787 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1788 | |
1da177e4 | 1789 | nfs4_lock_state(); |
a1bcecd2 | 1790 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1791 | if (conf) { |
a186e767 | 1792 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1793 | status = nfserr_clid_inuse; |
026722c2 | 1794 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1795 | char addr_str[INET6_ADDRSTRLEN]; |
1796 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1797 | sizeof(addr_str)); | |
1798 | dprintk("NFSD: setclientid: string in use by client " | |
1799 | "at %s\n", addr_str); | |
1da177e4 LT |
1800 | goto out; |
1801 | } | |
1da177e4 | 1802 | } |
a186e767 BF |
1803 | /* |
1804 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1805 | * has a description of SETCLIENTID request processing consisting | |
1806 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1807 | */ | |
a1bcecd2 | 1808 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1809 | status = nfserr_resource; |
1810 | if (!conf) { | |
a186e767 BF |
1811 | /* |
1812 | * RFC 3530 14.2.33 CASE 4: | |
1813 | * placed first, because it is the normal case | |
1da177e4 LT |
1814 | */ |
1815 | if (unconf) | |
1816 | expire_client(unconf); | |
b09333c4 | 1817 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1818 | if (new == NULL) |
1da177e4 | 1819 | goto out; |
1da177e4 | 1820 | gen_clid(new); |
599e0a22 | 1821 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1822 | /* |
a186e767 BF |
1823 | * RFC 3530 14.2.33 CASE 1: |
1824 | * probable callback update | |
1da177e4 | 1825 | */ |
31f4a6c1 N |
1826 | if (unconf) { |
1827 | /* Note this is removing unconfirmed {*x***}, | |
1828 | * which is stronger than RFC recommended {vxc**}. | |
1829 | * This has the advantage that there is at most | |
1830 | * one {*x***} in either list at any time. | |
1831 | */ | |
1832 | expire_client(unconf); | |
1da177e4 | 1833 | } |
b09333c4 | 1834 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1835 | if (new == NULL) |
1da177e4 | 1836 | goto out; |
1da177e4 | 1837 | copy_clid(new, conf); |
1da177e4 LT |
1838 | } else if (!unconf) { |
1839 | /* | |
a186e767 BF |
1840 | * RFC 3530 14.2.33 CASE 2: |
1841 | * probable client reboot; state will be removed if | |
1842 | * confirmed. | |
1da177e4 | 1843 | */ |
b09333c4 | 1844 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1845 | if (new == NULL) |
1da177e4 | 1846 | goto out; |
1da177e4 | 1847 | gen_clid(new); |
49ba8781 | 1848 | } else { |
a186e767 BF |
1849 | /* |
1850 | * RFC 3530 14.2.33 CASE 3: | |
1851 | * probable client reboot; state will be removed if | |
1852 | * confirmed. | |
1da177e4 LT |
1853 | */ |
1854 | expire_client(unconf); | |
b09333c4 | 1855 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1856 | if (new == NULL) |
1da177e4 | 1857 | goto out; |
1da177e4 | 1858 | gen_clid(new); |
1da177e4 | 1859 | } |
fbf4665f | 1860 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1861 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1862 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1863 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1864 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1865 | status = nfs_ok; | |
1866 | out: | |
1867 | nfs4_unlock_state(); | |
1868 | return status; | |
1869 | } | |
1870 | ||
1871 | ||
1872 | /* | |
a186e767 BF |
1873 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1874 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1875 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1876 | */ |
b37ad28b | 1877 | __be32 |
b591480b BF |
1878 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1879 | struct nfsd4_compound_state *cstate, | |
1880 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1881 | { |
363168b4 | 1882 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1883 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1884 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1885 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1886 | __be32 status; |
1da177e4 LT |
1887 | |
1888 | if (STALE_CLIENTID(clid)) | |
1889 | return nfserr_stale_clientid; | |
1890 | /* | |
1891 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1892 | * We get here on a DRC miss. | |
1893 | */ | |
1894 | ||
1895 | nfs4_lock_state(); | |
21ab45a4 N |
1896 | |
1897 | conf = find_confirmed_client(clid); | |
1898 | unconf = find_unconfirmed_client(clid); | |
1899 | ||
1900 | status = nfserr_clid_inuse; | |
363168b4 | 1901 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1902 | goto out; |
363168b4 | 1903 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1904 | goto out; |
1905 | ||
a186e767 BF |
1906 | /* |
1907 | * section 14.2.34 of RFC 3530 has a description of | |
1908 | * SETCLIENTID_CONFIRM request processing consisting | |
1909 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1910 | */ | |
366e0c1d | 1911 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1912 | /* |
1913 | * RFC 3530 14.2.34 CASE 1: | |
1914 | * callback update | |
1915 | */ | |
599e0a22 | 1916 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1917 | status = nfserr_clid_inuse; |
1918 | else { | |
2bf23875 | 1919 | atomic_set(&conf->cl_cb_set, 0); |
5a3c9d71 BF |
1920 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
1921 | nfsd4_probe_callback(conf); | |
1a69c179 | 1922 | expire_client(unconf); |
1da177e4 | 1923 | status = nfs_ok; |
1a69c179 | 1924 | |
1da177e4 | 1925 | } |
f3aba4e5 | 1926 | } else if (conf && !unconf) { |
a186e767 BF |
1927 | /* |
1928 | * RFC 3530 14.2.34 CASE 2: | |
1929 | * probable retransmitted request; play it safe and | |
1930 | * do nothing. | |
7c79f737 | 1931 | */ |
599e0a22 | 1932 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1933 | status = nfserr_clid_inuse; |
21ab45a4 | 1934 | else |
1da177e4 | 1935 | status = nfs_ok; |
7c79f737 | 1936 | } else if (!conf && unconf |
599e0a22 | 1937 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1938 | /* |
1939 | * RFC 3530 14.2.34 CASE 3: | |
1940 | * Normal case; new or rebooted client: | |
7c79f737 | 1941 | */ |
599e0a22 | 1942 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1943 | status = nfserr_clid_inuse; |
1944 | } else { | |
1a69c179 N |
1945 | unsigned int hash = |
1946 | clientstr_hashval(unconf->cl_recdir); | |
1947 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1948 | hash, false); |
1a69c179 | 1949 | if (conf) { |
c7b9a459 | 1950 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1951 | expire_client(conf); |
1952 | } | |
1da177e4 | 1953 | move_to_confirmed(unconf); |
21ab45a4 | 1954 | conf = unconf; |
5a3c9d71 | 1955 | nfsd4_probe_callback(conf); |
1a69c179 | 1956 | status = nfs_ok; |
1da177e4 | 1957 | } |
599e0a22 BF |
1958 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1959 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1960 | &confirm)))) { |
a186e767 BF |
1961 | /* |
1962 | * RFC 3530 14.2.34 CASE 4: | |
1963 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1964 | */ |
1da177e4 | 1965 | status = nfserr_stale_clientid; |
7c79f737 | 1966 | } else { |
08e8987c N |
1967 | /* check that we have hit one of the cases...*/ |
1968 | status = nfserr_clid_inuse; | |
1969 | } | |
1da177e4 | 1970 | out: |
1da177e4 LT |
1971 | nfs4_unlock_state(); |
1972 | return status; | |
1973 | } | |
1974 | ||
1da177e4 LT |
1975 | /* OPEN Share state helper functions */ |
1976 | static inline struct nfs4_file * | |
1977 | alloc_init_file(struct inode *ino) | |
1978 | { | |
1979 | struct nfs4_file *fp; | |
1980 | unsigned int hashval = file_hashval(ino); | |
1981 | ||
e60d4398 N |
1982 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1983 | if (fp) { | |
8b671b80 | 1984 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1985 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1986 | INIT_LIST_HEAD(&fp->fi_stateids); |
1987 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1988 | fp->fi_inode = igrab(ino); |
1989 | fp->fi_id = current_fileid++; | |
47f9940c | 1990 | fp->fi_had_conflict = false; |
f9d7562f BF |
1991 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
1992 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
1993 | spin_lock(&recall_lock); |
1994 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
1995 | spin_unlock(&recall_lock); | |
1da177e4 LT |
1996 | return fp; |
1997 | } | |
1998 | return NULL; | |
1999 | } | |
2000 | ||
e60d4398 | 2001 | static void |
e18b890b | 2002 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2003 | { |
e60d4398 N |
2004 | if (*slab == NULL) |
2005 | return; | |
1a1d92c1 | 2006 | kmem_cache_destroy(*slab); |
e60d4398 | 2007 | *slab = NULL; |
1da177e4 LT |
2008 | } |
2009 | ||
e8ff2a84 | 2010 | void |
1da177e4 LT |
2011 | nfsd4_free_slabs(void) |
2012 | { | |
e60d4398 N |
2013 | nfsd4_free_slab(&stateowner_slab); |
2014 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2015 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2016 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2017 | } |
1da177e4 | 2018 | |
e60d4398 N |
2019 | static int |
2020 | nfsd4_init_slabs(void) | |
2021 | { | |
2022 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2023 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2024 | if (stateowner_slab == NULL) |
2025 | goto out_nomem; | |
2026 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2027 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2028 | if (file_slab == NULL) |
2029 | goto out_nomem; | |
5ac049ac | 2030 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2031 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2032 | if (stateid_slab == NULL) |
2033 | goto out_nomem; | |
5b2d21c1 | 2034 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2035 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2036 | if (deleg_slab == NULL) |
2037 | goto out_nomem; | |
e60d4398 N |
2038 | return 0; |
2039 | out_nomem: | |
2040 | nfsd4_free_slabs(); | |
2041 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2042 | return -ENOMEM; | |
1da177e4 LT |
2043 | } |
2044 | ||
2045 | void | |
2046 | nfs4_free_stateowner(struct kref *kref) | |
2047 | { | |
2048 | struct nfs4_stateowner *sop = | |
2049 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2050 | kfree(sop->so_owner.data); | |
2051 | kmem_cache_free(stateowner_slab, sop); | |
2052 | } | |
2053 | ||
2054 | static inline struct nfs4_stateowner * | |
2055 | alloc_stateowner(struct xdr_netobj *owner) | |
2056 | { | |
2057 | struct nfs4_stateowner *sop; | |
2058 | ||
2059 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
2060 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
2061 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
2062 | sop->so_owner.len = owner->len; | |
2063 | kref_init(&sop->so_ref); | |
2064 | return sop; | |
2065 | } | |
2066 | kmem_cache_free(stateowner_slab, sop); | |
2067 | } | |
2068 | return NULL; | |
2069 | } | |
2070 | ||
2071 | static struct nfs4_stateowner * | |
2072 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2073 | struct nfs4_stateowner *sop; | |
2074 | struct nfs4_replay *rp; | |
2075 | unsigned int idhashval; | |
2076 | ||
2077 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
2078 | return NULL; | |
2079 | idhashval = ownerid_hashval(current_ownerid); | |
2080 | INIT_LIST_HEAD(&sop->so_idhash); | |
2081 | INIT_LIST_HEAD(&sop->so_strhash); | |
2082 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2083 | INIT_LIST_HEAD(&sop->so_stateids); |
2084 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
2085 | INIT_LIST_HEAD(&sop->so_close_lru); |
2086 | sop->so_time = 0; | |
2087 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
2088 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2089 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
2090 | sop->so_is_open_owner = 1; |
2091 | sop->so_id = current_ownerid++; | |
2092 | sop->so_client = clp; | |
2093 | sop->so_seqid = open->op_seqid; | |
2094 | sop->so_confirmed = 0; | |
2095 | rp = &sop->so_replay; | |
de1ae286 | 2096 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2097 | rp->rp_buflen = 0; |
2098 | rp->rp_buf = rp->rp_ibuf; | |
2099 | return sop; | |
2100 | } | |
2101 | ||
1da177e4 LT |
2102 | static inline void |
2103 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2104 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2105 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2106 | ||
2107 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2108 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2109 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2110 | INIT_LIST_HEAD(&stp->st_perfile); |
2111 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2112 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2113 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2114 | stp->st_stateowner = sop; |
13cd2184 | 2115 | get_nfs4_file(fp); |
1da177e4 | 2116 | stp->st_file = fp; |
e4e83ea4 | 2117 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2118 | stp->st_stateid.si_stateownerid = sop->so_id; |
2119 | stp->st_stateid.si_fileid = fp->fi_id; | |
2120 | stp->st_stateid.si_generation = 0; | |
2121 | stp->st_access_bmap = 0; | |
2122 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2123 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2124 | &stp->st_access_bmap); | |
1da177e4 | 2125 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2126 | stp->st_openstp = NULL; |
1da177e4 LT |
2127 | } |
2128 | ||
fd39ca9a | 2129 | static void |
1da177e4 LT |
2130 | move_to_close_lru(struct nfs4_stateowner *sop) |
2131 | { | |
2132 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2133 | ||
358dd55a | 2134 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2135 | sop->so_time = get_seconds(); |
2136 | } | |
2137 | ||
1da177e4 | 2138 | static int |
599e0a22 BF |
2139 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2140 | clientid_t *clid) | |
2141 | { | |
2142 | return (sop->so_owner.len == owner->len) && | |
2143 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2144 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2145 | } |
2146 | ||
2147 | static struct nfs4_stateowner * | |
2148 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2149 | { | |
2150 | struct nfs4_stateowner *so = NULL; | |
2151 | ||
2152 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2153 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2154 | return so; |
2155 | } | |
2156 | return NULL; | |
2157 | } | |
2158 | ||
2159 | /* search file_hashtbl[] for file */ | |
2160 | static struct nfs4_file * | |
2161 | find_file(struct inode *ino) | |
2162 | { | |
2163 | unsigned int hashval = file_hashval(ino); | |
2164 | struct nfs4_file *fp; | |
2165 | ||
8b671b80 | 2166 | spin_lock(&recall_lock); |
1da177e4 | 2167 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2168 | if (fp->fi_inode == ino) { |
2169 | get_nfs4_file(fp); | |
8b671b80 | 2170 | spin_unlock(&recall_lock); |
1da177e4 | 2171 | return fp; |
13cd2184 | 2172 | } |
1da177e4 | 2173 | } |
8b671b80 | 2174 | spin_unlock(&recall_lock); |
1da177e4 LT |
2175 | return NULL; |
2176 | } | |
2177 | ||
d87a8ade | 2178 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2179 | { |
d87a8ade | 2180 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2181 | return 0; |
d87a8ade AA |
2182 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2183 | return 0; | |
2184 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2185 | if (minorversion && x) { | |
2186 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2187 | return 0; | |
2188 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2189 | return 0; | |
2190 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2191 | } | |
2192 | if (x) | |
8838dc43 BF |
2193 | return 0; |
2194 | return 1; | |
ba5a6a19 BF |
2195 | } |
2196 | ||
8838dc43 | 2197 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2198 | { |
8838dc43 BF |
2199 | /* Note: unlike access bits, deny bits may be zero. */ |
2200 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2201 | } |
1da177e4 | 2202 | |
1da177e4 LT |
2203 | /* |
2204 | * Called to check deny when READ with all zero stateid or | |
2205 | * WRITE with all zero or all one stateid | |
2206 | */ | |
b37ad28b | 2207 | static __be32 |
1da177e4 LT |
2208 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2209 | { | |
2210 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2211 | struct nfs4_file *fp; | |
2212 | struct nfs4_stateid *stp; | |
b37ad28b | 2213 | __be32 ret; |
1da177e4 LT |
2214 | |
2215 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2216 | ||
2217 | fp = find_file(ino); | |
13cd2184 N |
2218 | if (!fp) |
2219 | return nfs_ok; | |
b700949b | 2220 | ret = nfserr_locked; |
1da177e4 | 2221 | /* Search for conflicting share reservations */ |
13cd2184 N |
2222 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2223 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2224 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2225 | goto out; | |
1da177e4 | 2226 | } |
13cd2184 N |
2227 | ret = nfs_ok; |
2228 | out: | |
2229 | put_nfs4_file(fp); | |
2230 | return ret; | |
1da177e4 LT |
2231 | } |
2232 | ||
2233 | static inline void | |
f9d7562f | 2234 | nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) |
1da177e4 | 2235 | { |
f9d7562f BF |
2236 | if (share_access & NFS4_SHARE_ACCESS_WRITE) |
2237 | nfs4_file_put_access(fp, O_WRONLY); | |
2238 | if (share_access & NFS4_SHARE_ACCESS_READ) | |
2239 | nfs4_file_put_access(fp, O_RDONLY); | |
1da177e4 LT |
2240 | } |
2241 | ||
1da177e4 LT |
2242 | /* |
2243 | * Spawn a thread to perform a recall on the delegation represented | |
2244 | * by the lease (file_lock) | |
2245 | * | |
2246 | * Called from break_lease() with lock_kernel() held. | |
2247 | * Note: we assume break_lease will only call this *once* for any given | |
2248 | * lease. | |
2249 | */ | |
2250 | static | |
2251 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2252 | { | |
63e4863f | 2253 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2254 | |
2255 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2256 | if (!dp) | |
2257 | return; | |
2258 | ||
2259 | /* We're assuming the state code never drops its reference | |
2260 | * without first removing the lease. Since we're in this lease | |
2261 | * callback (and since the lease code is serialized by the kernel | |
2262 | * lock) we know the server hasn't removed the lease yet, we know | |
2263 | * it's safe to take a reference: */ | |
2264 | atomic_inc(&dp->dl_count); | |
2265 | ||
2266 | spin_lock(&recall_lock); | |
2267 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2268 | spin_unlock(&recall_lock); | |
2269 | ||
2270 | /* only place dl_time is set. protected by lock_kernel*/ | |
2271 | dp->dl_time = get_seconds(); | |
2272 | ||
0272e1fd BF |
2273 | /* |
2274 | * We don't want the locks code to timeout the lease for us; | |
2275 | * we'll remove it ourself if the delegation isn't returned | |
2276 | * in time. | |
2277 | */ | |
2278 | fl->fl_break_time = 0; | |
1da177e4 | 2279 | |
63e4863f BF |
2280 | dp->dl_file->fi_had_conflict = true; |
2281 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2282 | } |
2283 | ||
2284 | /* | |
2285 | * The file_lock is being reapd. | |
2286 | * | |
2287 | * Called by locks_free_lock() with lock_kernel() held. | |
2288 | */ | |
2289 | static | |
2290 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2291 | { | |
2292 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2293 | ||
2294 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2295 | ||
2296 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2297 | return; | |
2298 | dp->dl_flock = NULL; | |
2299 | } | |
2300 | ||
2301 | /* | |
2302 | * Set the delegation file_lock back pointer. | |
2303 | * | |
a9933cea | 2304 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2305 | */ |
2306 | static | |
2307 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2308 | { | |
2309 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2310 | ||
2311 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2312 | if (!dp) | |
2313 | return; | |
2314 | dp->dl_flock = new; | |
2315 | } | |
2316 | ||
2317 | /* | |
a9933cea | 2318 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2319 | */ |
2320 | static | |
2321 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2322 | { | |
2323 | struct nfs4_delegation *onlistd = | |
2324 | (struct nfs4_delegation *)onlist->fl_owner; | |
2325 | struct nfs4_delegation *tryd = | |
2326 | (struct nfs4_delegation *)try->fl_owner; | |
2327 | ||
2328 | if (onlist->fl_lmops != try->fl_lmops) | |
2329 | return 0; | |
2330 | ||
2331 | return onlistd->dl_client == tryd->dl_client; | |
2332 | } | |
2333 | ||
2334 | ||
2335 | static | |
2336 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2337 | { | |
2338 | if (arg & F_UNLCK) | |
2339 | return lease_modify(onlist, arg); | |
2340 | else | |
2341 | return -EAGAIN; | |
2342 | } | |
2343 | ||
7b021967 | 2344 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2345 | .fl_break = nfsd_break_deleg_cb, |
2346 | .fl_release_private = nfsd_release_deleg_cb, | |
2347 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2348 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2349 | .fl_change = nfsd_change_deleg_cb, | |
2350 | }; | |
2351 | ||
2352 | ||
b37ad28b | 2353 | __be32 |
6668958f AA |
2354 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2355 | struct nfsd4_open *open) | |
1da177e4 | 2356 | { |
1da177e4 LT |
2357 | clientid_t *clientid = &open->op_clientid; |
2358 | struct nfs4_client *clp = NULL; | |
2359 | unsigned int strhashval; | |
2360 | struct nfs4_stateowner *sop = NULL; | |
2361 | ||
1da177e4 | 2362 | if (!check_name(open->op_owner)) |
0f442aa2 | 2363 | return nfserr_inval; |
1da177e4 LT |
2364 | |
2365 | if (STALE_CLIENTID(&open->op_clientid)) | |
2366 | return nfserr_stale_clientid; | |
2367 | ||
2368 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2369 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2370 | open->op_stateowner = sop; |
2371 | if (!sop) { | |
2372 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2373 | clp = find_confirmed_client(clientid); |
2374 | if (clp == NULL) | |
0f442aa2 BF |
2375 | return nfserr_expired; |
2376 | goto renew; | |
1da177e4 | 2377 | } |
6668958f AA |
2378 | /* When sessions are used, skip open sequenceid processing */ |
2379 | if (nfsd4_has_session(cstate)) | |
2380 | goto renew; | |
0f442aa2 BF |
2381 | if (!sop->so_confirmed) { |
2382 | /* Replace unconfirmed owners without checking for replay. */ | |
2383 | clp = sop->so_client; | |
f044ff83 | 2384 | release_openowner(sop); |
0f442aa2 BF |
2385 | open->op_stateowner = NULL; |
2386 | goto renew; | |
2387 | } | |
2388 | if (open->op_seqid == sop->so_seqid - 1) { | |
2389 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2390 | return nfserr_replay_me; |
0f442aa2 BF |
2391 | /* The original OPEN failed so spectacularly |
2392 | * that we don't even have replay data saved! | |
2393 | * Therefore, we have no choice but to continue | |
2394 | * processing this OPEN; presumably, we'll | |
2395 | * fail again for the same reason. | |
2396 | */ | |
2397 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2398 | goto renew; | |
2399 | } | |
2400 | if (open->op_seqid != sop->so_seqid) | |
2401 | return nfserr_bad_seqid; | |
1da177e4 | 2402 | renew: |
0f442aa2 BF |
2403 | if (open->op_stateowner == NULL) { |
2404 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2405 | if (sop == NULL) | |
2406 | return nfserr_resource; | |
2407 | open->op_stateowner = sop; | |
2408 | } | |
2409 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2410 | renew_client(sop->so_client); |
0f442aa2 | 2411 | return nfs_ok; |
1da177e4 LT |
2412 | } |
2413 | ||
b37ad28b | 2414 | static inline __be32 |
4a6e43e6 N |
2415 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2416 | { | |
2417 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2418 | return nfserr_openmode; | |
2419 | else | |
2420 | return nfs_ok; | |
2421 | } | |
2422 | ||
52f4fb43 N |
2423 | static struct nfs4_delegation * |
2424 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2425 | { | |
2426 | struct nfs4_delegation *dp; | |
2427 | ||
ea1da636 | 2428 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2429 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2430 | return dp; | |
2431 | } | |
2432 | return NULL; | |
2433 | } | |
2434 | ||
24a0111e BF |
2435 | int share_access_to_flags(u32 share_access) |
2436 | { | |
2437 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2438 | ||
2439 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2440 | } | |
2441 | ||
b37ad28b | 2442 | static __be32 |
567d9829 N |
2443 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2444 | struct nfs4_delegation **dp) | |
2445 | { | |
2446 | int flags; | |
b37ad28b | 2447 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2448 | |
2449 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2450 | if (*dp == NULL) | |
c44c5eeb | 2451 | goto out; |
24a0111e | 2452 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2453 | status = nfs4_check_delegmode(*dp, flags); |
2454 | if (status) | |
2455 | *dp = NULL; | |
c44c5eeb N |
2456 | out: |
2457 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2458 | return nfs_ok; | |
2459 | if (status) | |
2460 | return status; | |
2461 | open->op_stateowner->so_confirmed = 1; | |
2462 | return nfs_ok; | |
567d9829 N |
2463 | } |
2464 | ||
b37ad28b | 2465 | static __be32 |
1da177e4 LT |
2466 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2467 | { | |
2468 | struct nfs4_stateid *local; | |
b37ad28b | 2469 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2470 | struct nfs4_stateowner *sop = open->op_stateowner; |
2471 | ||
8beefa24 | 2472 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2473 | /* ignore lock owners */ |
2474 | if (local->st_stateowner->so_is_open_owner == 0) | |
2475 | continue; | |
2476 | /* remember if we have seen this open owner */ | |
2477 | if (local->st_stateowner == sop) | |
2478 | *stpp = local; | |
2479 | /* check for conflicting share reservations */ | |
2480 | if (!test_share(local, open)) | |
2481 | goto out; | |
2482 | } | |
2483 | status = 0; | |
2484 | out: | |
2485 | return status; | |
2486 | } | |
2487 | ||
5ac049ac N |
2488 | static inline struct nfs4_stateid * |
2489 | nfs4_alloc_stateid(void) | |
2490 | { | |
2491 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2492 | } | |
2493 | ||
21fb4016 BF |
2494 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2495 | { | |
2496 | int flags = 0; | |
2497 | ||
2498 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2499 | flags |= NFSD_MAY_READ; | |
2500 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2501 | flags |= NFSD_MAY_WRITE; | |
2502 | return flags; | |
2503 | } | |
2504 | ||
f9d7562f BF |
2505 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file |
2506 | *fp, struct svc_fh *cur_fh, u32 nfs4_access) | |
2507 | { | |
2508 | __be32 status; | |
2509 | int oflag = nfs4_access_to_omode(nfs4_access); | |
2510 | int access = nfs4_access_to_access(nfs4_access); | |
2511 | ||
2512 | if (!fp->fi_fds[oflag]) { | |
2513 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2514 | &fp->fi_fds[oflag]); | |
2515 | if (status == nfserr_dropit) | |
2516 | status = nfserr_jukebox; | |
2517 | if (status) | |
2518 | return status; | |
2519 | } | |
2520 | nfs4_file_get_access(fp, oflag); | |
2521 | ||
2522 | return nfs_ok; | |
2523 | } | |
2524 | ||
b37ad28b | 2525 | static __be32 |
1da177e4 | 2526 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2527 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2528 | struct nfsd4_open *open) | |
1da177e4 LT |
2529 | { |
2530 | struct nfs4_stateid *stp; | |
f9d7562f | 2531 | __be32 status; |
1da177e4 | 2532 | |
5ac049ac | 2533 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2534 | if (stp == NULL) |
2535 | return nfserr_resource; | |
2536 | ||
f9d7562f BF |
2537 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); |
2538 | if (status) { | |
2539 | kmem_cache_free(stateid_slab, stp); | |
2540 | return status; | |
1da177e4 | 2541 | } |
1da177e4 LT |
2542 | *stpp = stp; |
2543 | return 0; | |
2544 | } | |
2545 | ||
b37ad28b | 2546 | static inline __be32 |
1da177e4 LT |
2547 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2548 | struct nfsd4_open *open) | |
2549 | { | |
2550 | struct iattr iattr = { | |
2551 | .ia_valid = ATTR_SIZE, | |
2552 | .ia_size = 0, | |
2553 | }; | |
2554 | if (!open->op_truncate) | |
2555 | return 0; | |
2556 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2557 | return nfserr_inval; |
1da177e4 LT |
2558 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2559 | } | |
2560 | ||
b37ad28b | 2561 | static __be32 |
f9d7562f | 2562 | 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 | 2563 | { |
7d947842 BF |
2564 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2565 | bool new_access; | |
b37ad28b | 2566 | __be32 status; |
1da177e4 | 2567 | |
7d947842 | 2568 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2569 | if (new_access) { |
7d947842 | 2570 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); |
f9d7562f BF |
2571 | if (status) |
2572 | return status; | |
6c26d08f | 2573 | } |
1da177e4 LT |
2574 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2575 | if (status) { | |
f9d7562f BF |
2576 | if (new_access) { |
2577 | int oflag = nfs4_access_to_omode(new_access); | |
2578 | nfs4_file_put_access(fp, oflag); | |
2579 | } | |
1da177e4 LT |
2580 | return status; |
2581 | } | |
2582 | /* remember the open */ | |
24a0111e | 2583 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2584 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2585 | |
2586 | return nfs_ok; | |
2587 | } | |
2588 | ||
2589 | ||
1da177e4 | 2590 | static void |
37515177 | 2591 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2592 | { |
37515177 N |
2593 | open->op_stateowner->so_confirmed = 1; |
2594 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2595 | } |
2596 | ||
2597 | /* | |
2598 | * Attempt to hand out a delegation. | |
2599 | */ | |
2600 | static void | |
2601 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2602 | { | |
2603 | struct nfs4_delegation *dp; | |
2604 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2605 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2606 | struct file_lock fl, *flp = &fl; |
2607 | int status, flag = 0; | |
2608 | ||
2609 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2610 | open->op_recall = 0; |
2611 | switch (open->op_claim_type) { | |
2612 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2613 | if (!cb_up) |
7b190fec N |
2614 | open->op_recall = 1; |
2615 | flag = open->op_delegate_type; | |
2616 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2617 | goto out; | |
2618 | break; | |
2619 | case NFS4_OPEN_CLAIM_NULL: | |
2620 | /* Let's not give out any delegations till everyone's | |
2621 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2622 | if (locks_in_grace()) |
7b190fec | 2623 | goto out; |
2bf23875 | 2624 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2625 | goto out; |
2626 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2627 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2628 | else | |
2629 | flag = NFS4_OPEN_DELEGATE_READ; | |
2630 | break; | |
2631 | default: | |
2632 | goto out; | |
2633 | } | |
1da177e4 LT |
2634 | |
2635 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2636 | if (dp == NULL) { | |
2637 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2638 | goto out; | |
2639 | } | |
2640 | locks_init_lock(&fl); | |
2641 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2642 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2643 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2644 | fl.fl_end = OFFSET_MAX; |
2645 | fl.fl_owner = (fl_owner_t)dp; | |
f9d7562f BF |
2646 | fl.fl_file = find_readable_file(stp->st_file); |
2647 | BUG_ON(!fl.fl_file); | |
1da177e4 LT |
2648 | fl.fl_pid = current->tgid; |
2649 | ||
a9933cea | 2650 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2651 | * the lock_manager callbacks fl_mylease and fl_change are used |
2652 | */ | |
f9d7562f | 2653 | if ((status = vfs_setlease(fl.fl_file, fl.fl_type, &flp))) { |
1da177e4 | 2654 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2655 | unhash_delegation(dp); |
1da177e4 LT |
2656 | flag = NFS4_OPEN_DELEGATE_NONE; |
2657 | goto out; | |
2658 | } | |
2659 | ||
2660 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2661 | ||
8c10cbdb BH |
2662 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2663 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2664 | out: |
7b190fec N |
2665 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2666 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2667 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2668 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2669 | open->op_delegate_type = flag; |
2670 | } | |
2671 | ||
2672 | /* | |
2673 | * called with nfs4_lock_state() held. | |
2674 | */ | |
b37ad28b | 2675 | __be32 |
1da177e4 LT |
2676 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2677 | { | |
6668958f | 2678 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2679 | struct nfs4_file *fp = NULL; |
2680 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2681 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2682 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2683 | __be32 status; |
1da177e4 LT |
2684 | |
2685 | status = nfserr_inval; | |
d87a8ade | 2686 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2687 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2688 | goto out; |
2689 | /* | |
2690 | * Lookup file; if found, lookup stateid and check open request, | |
2691 | * and check for delegations in the process of being recalled. | |
2692 | * If not found, create the nfs4_file struct | |
2693 | */ | |
2694 | fp = find_file(ino); | |
2695 | if (fp) { | |
2696 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2697 | goto out; | |
c44c5eeb N |
2698 | status = nfs4_check_deleg(fp, open, &dp); |
2699 | if (status) | |
2700 | goto out; | |
1da177e4 | 2701 | } else { |
c44c5eeb N |
2702 | status = nfserr_bad_stateid; |
2703 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2704 | goto out; | |
1da177e4 LT |
2705 | status = nfserr_resource; |
2706 | fp = alloc_init_file(ino); | |
2707 | if (fp == NULL) | |
2708 | goto out; | |
2709 | } | |
2710 | ||
2711 | /* | |
2712 | * OPEN the file, or upgrade an existing OPEN. | |
2713 | * If truncate fails, the OPEN fails. | |
2714 | */ | |
2715 | if (stp) { | |
2716 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2717 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2718 | if (status) |
2719 | goto out; | |
444c2c07 | 2720 | update_stateid(&stp->st_stateid); |
1da177e4 | 2721 | } else { |
f9d7562f | 2722 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2723 | if (status) |
1da177e4 LT |
2724 | goto out; |
2725 | init_stateid(stp, fp, open); | |
2726 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2727 | if (status) { | |
2283963f | 2728 | release_open_stateid(stp); |
1da177e4 LT |
2729 | goto out; |
2730 | } | |
6668958f AA |
2731 | if (nfsd4_has_session(&resp->cstate)) |
2732 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2733 | } |
2734 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2735 | ||
4dc6ec00 | 2736 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2737 | open->op_stateowner->so_confirmed = 1; |
2738 | ||
1da177e4 LT |
2739 | /* |
2740 | * Attempt to hand out a delegation. No error return, because the | |
2741 | * OPEN succeeds even if we fail. | |
2742 | */ | |
2743 | nfs4_open_delegation(current_fh, open, stp); | |
2744 | ||
2745 | status = nfs_ok; | |
2746 | ||
8c10cbdb BH |
2747 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2748 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2749 | out: |
13cd2184 N |
2750 | if (fp) |
2751 | put_nfs4_file(fp); | |
37515177 N |
2752 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2753 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2754 | /* |
2755 | * To finish the open response, we just need to set the rflags. | |
2756 | */ | |
2757 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2758 | if (!open->op_stateowner->so_confirmed && |
2759 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2760 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2761 | ||
2762 | return status; | |
2763 | } | |
2764 | ||
b37ad28b | 2765 | __be32 |
b591480b BF |
2766 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2767 | clientid_t *clid) | |
1da177e4 LT |
2768 | { |
2769 | struct nfs4_client *clp; | |
b37ad28b | 2770 | __be32 status; |
1da177e4 LT |
2771 | |
2772 | nfs4_lock_state(); | |
2773 | dprintk("process_renew(%08x/%08x): starting\n", | |
2774 | clid->cl_boot, clid->cl_id); | |
2775 | status = nfserr_stale_clientid; | |
2776 | if (STALE_CLIENTID(clid)) | |
2777 | goto out; | |
2778 | clp = find_confirmed_client(clid); | |
2779 | status = nfserr_expired; | |
2780 | if (clp == NULL) { | |
2781 | /* We assume the client took too long to RENEW. */ | |
2782 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2783 | goto out; | |
2784 | } | |
2785 | renew_client(clp); | |
2786 | status = nfserr_cb_path_down; | |
ea1da636 | 2787 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2788 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2789 | goto out; |
2790 | status = nfs_ok; | |
2791 | out: | |
2792 | nfs4_unlock_state(); | |
2793 | return status; | |
2794 | } | |
2795 | ||
af558e33 BF |
2796 | struct lock_manager nfsd4_manager = { |
2797 | }; | |
2798 | ||
a76b4319 | 2799 | static void |
af558e33 | 2800 | nfsd4_end_grace(void) |
a76b4319 N |
2801 | { |
2802 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2803 | nfsd4_recdir_purge_old(); |
af558e33 | 2804 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2805 | /* |
2806 | * Now that every NFSv4 client has had the chance to recover and | |
2807 | * to see the (possibly new, possibly shorter) lease time, we | |
2808 | * can safely set the next grace time to the current lease time: | |
2809 | */ | |
2810 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2811 | } |
2812 | ||
fd39ca9a | 2813 | static time_t |
1da177e4 LT |
2814 | nfs4_laundromat(void) |
2815 | { | |
2816 | struct nfs4_client *clp; | |
2817 | struct nfs4_stateowner *sop; | |
2818 | struct nfs4_delegation *dp; | |
2819 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2820 | time_t cutoff = get_seconds() - nfsd4_lease; |
2821 | time_t t, clientid_val = nfsd4_lease; | |
2822 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2823 | |
2824 | nfs4_lock_state(); | |
2825 | ||
2826 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2827 | if (locks_in_grace()) |
2828 | nfsd4_end_grace(); | |
36acb66b BH |
2829 | INIT_LIST_HEAD(&reaplist); |
2830 | spin_lock(&client_lock); | |
1da177e4 LT |
2831 | list_for_each_safe(pos, next, &client_lru) { |
2832 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2833 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2834 | t = clp->cl_time - cutoff; | |
2835 | if (clientid_val > t) | |
2836 | clientid_val = t; | |
2837 | break; | |
2838 | } | |
d7682988 BH |
2839 | if (atomic_read(&clp->cl_refcount)) { |
2840 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2841 | clp->cl_clientid.cl_id); | |
2842 | continue; | |
2843 | } | |
2844 | unhash_client_locked(clp); | |
2845 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2846 | } |
2847 | spin_unlock(&client_lock); | |
2848 | list_for_each_safe(pos, next, &reaplist) { | |
2849 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2850 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2851 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2852 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2853 | expire_client(clp); |
2854 | } | |
1da177e4 LT |
2855 | spin_lock(&recall_lock); |
2856 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2857 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2858 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2859 | u = dp->dl_time - cutoff; | |
2860 | if (test_val > u) | |
2861 | test_val = u; | |
2862 | break; | |
2863 | } | |
2864 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2865 | dp, dp->dl_flock); | |
2866 | list_move(&dp->dl_recall_lru, &reaplist); | |
2867 | } | |
2868 | spin_unlock(&recall_lock); | |
2869 | list_for_each_safe(pos, next, &reaplist) { | |
2870 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2871 | list_del_init(&dp->dl_recall_lru); | |
2872 | unhash_delegation(dp); | |
2873 | } | |
cf07d2ea | 2874 | test_val = nfsd4_lease; |
1da177e4 LT |
2875 | list_for_each_safe(pos, next, &close_lru) { |
2876 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2877 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2878 | u = sop->so_time - cutoff; | |
2879 | if (test_val > u) | |
2880 | test_val = u; | |
2881 | break; | |
2882 | } | |
2883 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2884 | sop->so_id); | |
f044ff83 | 2885 | release_openowner(sop); |
1da177e4 LT |
2886 | } |
2887 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2888 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2889 | nfs4_unlock_state(); | |
2890 | return clientid_val; | |
2891 | } | |
2892 | ||
a254b246 HH |
2893 | static struct workqueue_struct *laundry_wq; |
2894 | static void laundromat_main(struct work_struct *); | |
2895 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2896 | ||
2897 | static void | |
c4028958 | 2898 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2899 | { |
2900 | time_t t; | |
2901 | ||
2902 | t = nfs4_laundromat(); | |
2903 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2904 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2905 | } |
2906 | ||
fd39ca9a | 2907 | static struct nfs4_stateowner * |
f8816512 N |
2908 | search_close_lru(u32 st_id, int flags) |
2909 | { | |
1da177e4 LT |
2910 | struct nfs4_stateowner *local = NULL; |
2911 | ||
1da177e4 LT |
2912 | if (flags & CLOSE_STATE) { |
2913 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2914 | if (local->so_id == st_id) | |
2915 | return local; | |
2916 | } | |
2917 | } | |
2918 | return NULL; | |
2919 | } | |
2920 | ||
2921 | static inline int | |
2922 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2923 | { | |
f9d7562f | 2924 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
2925 | } |
2926 | ||
2927 | static int | |
2928 | STALE_STATEID(stateid_t *stateid) | |
2929 | { | |
e4e83ea4 BF |
2930 | if (stateid->si_boot == boot_time) |
2931 | return 0; | |
2932 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 2933 | STATEID_VAL(stateid)); |
e4e83ea4 | 2934 | return 1; |
1da177e4 LT |
2935 | } |
2936 | ||
2937 | static inline int | |
2938 | access_permit_read(unsigned long access_bmap) | |
2939 | { | |
2940 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2941 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2942 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2943 | } | |
2944 | ||
2945 | static inline int | |
2946 | access_permit_write(unsigned long access_bmap) | |
2947 | { | |
2948 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2949 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2950 | } | |
2951 | ||
2952 | static | |
b37ad28b | 2953 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2954 | { |
b37ad28b | 2955 | __be32 status = nfserr_openmode; |
1da177e4 | 2956 | |
02921914 BF |
2957 | /* For lock stateid's, we test the parent open, not the lock: */ |
2958 | if (stp->st_openstp) | |
2959 | stp = stp->st_openstp; | |
1da177e4 LT |
2960 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
2961 | goto out; | |
2962 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2963 | goto out; | |
2964 | status = nfs_ok; | |
2965 | out: | |
2966 | return status; | |
2967 | } | |
2968 | ||
b37ad28b | 2969 | static inline __be32 |
1da177e4 LT |
2970 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2971 | { | |
203a8c8e | 2972 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2973 | return nfs_ok; |
af558e33 | 2974 | else if (locks_in_grace()) { |
1da177e4 LT |
2975 | /* Answer in remaining cases depends on existance of |
2976 | * conflicting state; so we must wait out the grace period. */ | |
2977 | return nfserr_grace; | |
2978 | } else if (flags & WR_STATE) | |
2979 | return nfs4_share_conflict(current_fh, | |
2980 | NFS4_SHARE_DENY_WRITE); | |
2981 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2982 | return nfs4_share_conflict(current_fh, | |
2983 | NFS4_SHARE_DENY_READ); | |
2984 | } | |
2985 | ||
2986 | /* | |
2987 | * Allow READ/WRITE during grace period on recovered state only for files | |
2988 | * that are not able to provide mandatory locking. | |
2989 | */ | |
2990 | static inline int | |
18f82731 | 2991 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2992 | { |
203a8c8e | 2993 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2994 | } |
2995 | ||
6668958f | 2996 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2997 | { |
6668958f AA |
2998 | /* |
2999 | * When sessions are used the stateid generation number is ignored | |
3000 | * when it is zero. | |
3001 | */ | |
3002 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
3003 | goto out; | |
3004 | ||
0836f587 BF |
3005 | /* If the client sends us a stateid from the future, it's buggy: */ |
3006 | if (in->si_generation > ref->si_generation) | |
3007 | return nfserr_bad_stateid; | |
3008 | /* | |
3009 | * The following, however, can happen. For example, if the | |
3010 | * client sends an open and some IO at the same time, the open | |
3011 | * may bump si_generation while the IO is still in flight. | |
3012 | * Thanks to hard links and renames, the client never knows what | |
3013 | * file an open will affect. So it could avoid that situation | |
3014 | * only by serializing all opens and IO from the same open | |
3015 | * owner. To recover from the old_stateid error, the client | |
3016 | * will just have to retry the IO: | |
3017 | */ | |
3018 | if (in->si_generation < ref->si_generation) | |
3019 | return nfserr_old_stateid; | |
6668958f | 3020 | out: |
0836f587 BF |
3021 | return nfs_ok; |
3022 | } | |
3023 | ||
3e633079 BF |
3024 | static int is_delegation_stateid(stateid_t *stateid) |
3025 | { | |
3026 | return stateid->si_fileid == 0; | |
3027 | } | |
3028 | ||
1da177e4 LT |
3029 | /* |
3030 | * Checks for stateid operations | |
3031 | */ | |
b37ad28b | 3032 | __be32 |
dd453dfd BH |
3033 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3034 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3035 | { |
3036 | struct nfs4_stateid *stp = NULL; | |
3037 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3038 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3039 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3040 | __be32 status; |
1da177e4 | 3041 | |
1da177e4 LT |
3042 | if (filpp) |
3043 | *filpp = NULL; | |
3044 | ||
18f82731 | 3045 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3046 | return nfserr_grace; |
3047 | ||
6668958f AA |
3048 | if (nfsd4_has_session(cstate)) |
3049 | flags |= HAS_SESSION; | |
3050 | ||
1da177e4 LT |
3051 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3052 | return check_special_stateids(current_fh, stateid, flags); | |
3053 | ||
1da177e4 LT |
3054 | status = nfserr_stale_stateid; |
3055 | if (STALE_STATEID(stateid)) | |
3056 | goto out; | |
3057 | ||
33515142 BF |
3058 | /* |
3059 | * We assume that any stateid that has the current boot time, | |
3060 | * but that we can't find, is expired: | |
3061 | */ | |
3062 | status = nfserr_expired; | |
3e633079 | 3063 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3064 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3065 | if (!dp) |
1da177e4 | 3066 | goto out; |
6668958f AA |
3067 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
3068 | flags); | |
0c2a498f BF |
3069 | if (status) |
3070 | goto out; | |
dc9bf700 BF |
3071 | status = nfs4_check_delegmode(dp, flags); |
3072 | if (status) | |
3073 | goto out; | |
3074 | renew_client(dp->dl_client); | |
dc9bf700 | 3075 | if (filpp) |
f9d7562f BF |
3076 | *filpp = find_readable_file(dp->dl_file); |
3077 | BUG_ON(!*filpp); | |
1da177e4 | 3078 | } else { /* open or lock stateid */ |
a4455be0 | 3079 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3080 | if (!stp) |
1da177e4 | 3081 | goto out; |
33515142 | 3082 | status = nfserr_bad_stateid; |
6150ef0d | 3083 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3084 | goto out; |
3085 | if (!stp->st_stateowner->so_confirmed) | |
3086 | goto out; | |
6668958f AA |
3087 | status = check_stateid_generation(stateid, &stp->st_stateid, |
3088 | flags); | |
0c2a498f BF |
3089 | if (status) |
3090 | goto out; | |
a4455be0 BF |
3091 | status = nfs4_check_openmode(stp, flags); |
3092 | if (status) | |
1da177e4 LT |
3093 | goto out; |
3094 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3095 | if (filpp) { |
3096 | if (flags & RD_STATE) | |
3097 | *filpp = find_readable_file(stp->st_file); | |
3098 | else | |
3099 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3100 | } |
1da177e4 LT |
3101 | } |
3102 | status = nfs_ok; | |
3103 | out: | |
3104 | return status; | |
3105 | } | |
3106 | ||
4c4cd222 N |
3107 | static inline int |
3108 | setlkflg (int type) | |
3109 | { | |
3110 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3111 | RD_STATE : WR_STATE; | |
3112 | } | |
1da177e4 LT |
3113 | |
3114 | /* | |
3115 | * Checks for sequence id mutating operations. | |
3116 | */ | |
b37ad28b | 3117 | static __be32 |
dd453dfd BH |
3118 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3119 | stateid_t *stateid, int flags, | |
3120 | struct nfs4_stateowner **sopp, | |
3121 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3122 | { |
1da177e4 LT |
3123 | struct nfs4_stateid *stp; |
3124 | struct nfs4_stateowner *sop; | |
dd453dfd | 3125 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3126 | __be32 status; |
1da177e4 | 3127 | |
8c10cbdb BH |
3128 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3129 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3130 | |
1da177e4 LT |
3131 | *stpp = NULL; |
3132 | *sopp = NULL; | |
3133 | ||
1da177e4 | 3134 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3135 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3136 | return nfserr_bad_stateid; |
1da177e4 LT |
3137 | } |
3138 | ||
1da177e4 | 3139 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3140 | return nfserr_stale_stateid; |
6668958f AA |
3141 | |
3142 | if (nfsd4_has_session(cstate)) | |
3143 | flags |= HAS_SESSION; | |
3144 | ||
1da177e4 LT |
3145 | /* |
3146 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3147 | * the confirmed flag is incorrecly set, or the generation | |
3148 | * number is incorrect. | |
1da177e4 | 3149 | */ |
f8816512 N |
3150 | stp = find_stateid(stateid, flags); |
3151 | if (stp == NULL) { | |
3152 | /* | |
3153 | * Also, we should make sure this isn't just the result of | |
3154 | * a replayed close: | |
3155 | */ | |
3156 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3157 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3158 | if (sop == NULL) |
33515142 | 3159 | return nfserr_expired; |
f8816512 N |
3160 | *sopp = sop; |
3161 | goto check_replay; | |
3162 | } | |
1da177e4 | 3163 | |
39325bd0 BF |
3164 | *stpp = stp; |
3165 | *sopp = sop = stp->st_stateowner; | |
3166 | ||
4c4cd222 | 3167 | if (lock) { |
4c4cd222 | 3168 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3169 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3170 | int lkflg = 0; |
b37ad28b | 3171 | __be32 status; |
4c4cd222 N |
3172 | |
3173 | lkflg = setlkflg(lock->lk_type); | |
3174 | ||
3175 | if (lock->lk_is_new) { | |
599e0a22 BF |
3176 | if (!sop->so_is_open_owner) |
3177 | return nfserr_bad_stateid; | |
60adfc50 AA |
3178 | if (!(flags & HAS_SESSION) && |
3179 | !same_clid(&clp->cl_clientid, lockclid)) | |
3180 | return nfserr_bad_stateid; | |
599e0a22 BF |
3181 | /* stp is the open stateid */ |
3182 | status = nfs4_check_openmode(stp, lkflg); | |
3183 | if (status) | |
3184 | return status; | |
3185 | } else { | |
3186 | /* stp is the lock stateid */ | |
3187 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3188 | if (status) | |
3189 | return status; | |
4c4cd222 | 3190 | } |
1da177e4 LT |
3191 | } |
3192 | ||
f3362737 | 3193 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3194 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3195 | return nfserr_bad_stateid; |
1da177e4 LT |
3196 | } |
3197 | ||
1da177e4 LT |
3198 | /* |
3199 | * We now validate the seqid and stateid generation numbers. | |
3200 | * For the moment, we ignore the possibility of | |
3201 | * generation number wraparound. | |
3202 | */ | |
6668958f | 3203 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3204 | goto check_replay; |
3205 | ||
3a4f98bb | 3206 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3207 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3208 | " unconfirmed stateowner!\n"); |
3209 | return nfserr_bad_stateid; | |
1da177e4 | 3210 | } |
3a4f98bb | 3211 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3212 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3213 | " confirmed yet!\n"); |
3214 | return nfserr_bad_stateid; | |
1da177e4 | 3215 | } |
6668958f | 3216 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3217 | if (status) |
3218 | return status; | |
52fd004e | 3219 | renew_client(sop->so_client); |
3a4f98bb | 3220 | return nfs_ok; |
1da177e4 | 3221 | |
1da177e4 | 3222 | check_replay: |
bd9aac52 | 3223 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3224 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3225 | /* indicate replay to calling function */ |
a90b061c | 3226 | return nfserr_replay_me; |
1da177e4 | 3227 | } |
2fdada03 | 3228 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3229 | sop->so_seqid, seqid); |
3230 | *sopp = NULL; | |
3231 | return nfserr_bad_seqid; | |
1da177e4 LT |
3232 | } |
3233 | ||
b37ad28b | 3234 | __be32 |
ca364317 | 3235 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3236 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3237 | { |
b37ad28b | 3238 | __be32 status; |
1da177e4 LT |
3239 | struct nfs4_stateowner *sop; |
3240 | struct nfs4_stateid *stp; | |
3241 | ||
3242 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3243 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3244 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3245 | |
ca364317 | 3246 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3247 | if (status) |
3248 | return status; | |
1da177e4 LT |
3249 | |
3250 | nfs4_lock_state(); | |
3251 | ||
dd453dfd | 3252 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3253 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3254 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3255 | &oc->oc_stateowner, &stp, NULL))) |
3256 | goto out; | |
3257 | ||
3258 | sop = oc->oc_stateowner; | |
3259 | sop->so_confirmed = 1; | |
3260 | update_stateid(&stp->st_stateid); | |
3261 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3262 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3263 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3264 | |
3265 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3266 | out: |
f2327d9a | 3267 | if (oc->oc_stateowner) { |
1da177e4 | 3268 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3269 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3270 | } |
1da177e4 LT |
3271 | nfs4_unlock_state(); |
3272 | return status; | |
3273 | } | |
3274 | ||
3275 | ||
3276 | /* | |
3277 | * unset all bits in union bitmap (bmap) that | |
3278 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3279 | */ | |
3280 | static void | |
3281 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3282 | { | |
3283 | int i; | |
3284 | for (i = 1; i < 4; i++) { | |
3285 | if ((i & access) != i) | |
3286 | __clear_bit(i, bmap); | |
3287 | } | |
3288 | } | |
3289 | ||
3290 | static void | |
3291 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3292 | { | |
3293 | int i; | |
3294 | for (i = 0; i < 4; i++) { | |
3295 | if ((i & deny) != i) | |
3296 | __clear_bit(i, bmap); | |
3297 | } | |
3298 | } | |
3299 | ||
b37ad28b | 3300 | __be32 |
ca364317 BF |
3301 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3302 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3303 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3304 | { |
b37ad28b | 3305 | __be32 status; |
1da177e4 LT |
3306 | struct nfs4_stateid *stp; |
3307 | unsigned int share_access; | |
3308 | ||
3309 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3310 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3311 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3312 | |
d87a8ade | 3313 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3314 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3315 | return nfserr_inval; |
3316 | ||
3317 | nfs4_lock_state(); | |
dd453dfd | 3318 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3319 | od->od_seqid, |
1da177e4 | 3320 | &od->od_stateid, |
f3362737 | 3321 | OPEN_STATE, |
1da177e4 LT |
3322 | &od->od_stateowner, &stp, NULL))) |
3323 | goto out; | |
3324 | ||
3325 | status = nfserr_inval; | |
3326 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3327 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3328 | stp->st_access_bmap, od->od_share_access); | |
3329 | goto out; | |
3330 | } | |
3331 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3332 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3333 | stp->st_deny_bmap, od->od_share_deny); | |
3334 | goto out; | |
3335 | } | |
3336 | set_access(&share_access, stp->st_access_bmap); | |
f9d7562f | 3337 | nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); |
1da177e4 LT |
3338 | |
3339 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3340 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3341 | ||
3342 | update_stateid(&stp->st_stateid); | |
3343 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3344 | status = nfs_ok; | |
3345 | out: | |
f2327d9a | 3346 | if (od->od_stateowner) { |
1da177e4 | 3347 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3348 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3349 | } |
1da177e4 LT |
3350 | nfs4_unlock_state(); |
3351 | return status; | |
3352 | } | |
3353 | ||
3354 | /* | |
3355 | * nfs4_unlock_state() called after encode | |
3356 | */ | |
b37ad28b | 3357 | __be32 |
ca364317 | 3358 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3359 | struct nfsd4_close *close) |
1da177e4 | 3360 | { |
b37ad28b | 3361 | __be32 status; |
1da177e4 LT |
3362 | struct nfs4_stateid *stp; |
3363 | ||
3364 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3365 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3366 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3367 | |
3368 | nfs4_lock_state(); | |
3369 | /* check close_lru for replay */ | |
dd453dfd | 3370 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3371 | close->cl_seqid, |
1da177e4 | 3372 | &close->cl_stateid, |
f3362737 | 3373 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3374 | &close->cl_stateowner, &stp, NULL))) |
3375 | goto out; | |
1da177e4 LT |
3376 | status = nfs_ok; |
3377 | update_stateid(&stp->st_stateid); | |
3378 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3379 | ||
04ef5954 | 3380 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3381 | release_open_stateid(stp); |
04ef5954 BF |
3382 | |
3383 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3384 | * released by the laundromat service after the lease period | |
3385 | * to enable us to handle CLOSE replay | |
3386 | */ | |
3387 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3388 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3389 | out: |
f2327d9a | 3390 | if (close->cl_stateowner) { |
1da177e4 | 3391 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3392 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3393 | } |
1da177e4 LT |
3394 | nfs4_unlock_state(); |
3395 | return status; | |
3396 | } | |
3397 | ||
b37ad28b | 3398 | __be32 |
ca364317 BF |
3399 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3400 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3401 | { |
203a8c8e BF |
3402 | struct nfs4_delegation *dp; |
3403 | stateid_t *stateid = &dr->dr_stateid; | |
3404 | struct inode *inode; | |
b37ad28b | 3405 | __be32 status; |
6668958f | 3406 | int flags = 0; |
1da177e4 | 3407 | |
ca364317 | 3408 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3409 | return status; |
3410 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3411 | |
6668958f AA |
3412 | if (nfsd4_has_session(cstate)) |
3413 | flags |= HAS_SESSION; | |
1da177e4 | 3414 | nfs4_lock_state(); |
203a8c8e BF |
3415 | status = nfserr_bad_stateid; |
3416 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3417 | goto out; | |
3418 | status = nfserr_stale_stateid; | |
3419 | if (STALE_STATEID(stateid)) | |
3420 | goto out; | |
7e0f7cf5 | 3421 | status = nfserr_bad_stateid; |
203a8c8e BF |
3422 | if (!is_delegation_stateid(stateid)) |
3423 | goto out; | |
33515142 | 3424 | status = nfserr_expired; |
203a8c8e | 3425 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3426 | if (!dp) |
203a8c8e | 3427 | goto out; |
6668958f | 3428 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3429 | if (status) |
3430 | goto out; | |
3431 | renew_client(dp->dl_client); | |
3432 | ||
3433 | unhash_delegation(dp); | |
1da177e4 | 3434 | out: |
203a8c8e BF |
3435 | nfs4_unlock_state(); |
3436 | ||
1da177e4 LT |
3437 | return status; |
3438 | } | |
3439 | ||
3440 | ||
3441 | /* | |
3442 | * Lock owner state (byte-range locks) | |
3443 | */ | |
3444 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3445 | #define LOCK_HASH_BITS 8 | |
3446 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3447 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3448 | ||
87df4de8 BH |
3449 | static inline u64 |
3450 | end_offset(u64 start, u64 len) | |
3451 | { | |
3452 | u64 end; | |
3453 | ||
3454 | end = start + len; | |
3455 | return end >= start ? end: NFS4_MAX_UINT64; | |
3456 | } | |
3457 | ||
3458 | /* last octet in a range */ | |
3459 | static inline u64 | |
3460 | last_byte_offset(u64 start, u64 len) | |
3461 | { | |
3462 | u64 end; | |
3463 | ||
3464 | BUG_ON(!len); | |
3465 | end = start + len; | |
3466 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3467 | } | |
3468 | ||
1da177e4 LT |
3469 | #define lockownerid_hashval(id) \ |
3470 | ((id) & LOCK_HASH_MASK) | |
3471 | ||
3472 | static inline unsigned int | |
3473 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3474 | struct xdr_netobj *ownername) | |
3475 | { | |
3476 | return (file_hashval(inode) + cl_id | |
3477 | + opaque_hashval(ownername->data, ownername->len)) | |
3478 | & LOCK_HASH_MASK; | |
3479 | } | |
3480 | ||
3481 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3482 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3483 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3484 | ||
fd39ca9a | 3485 | static struct nfs4_stateid * |
1da177e4 LT |
3486 | find_stateid(stateid_t *stid, int flags) |
3487 | { | |
9346eff0 | 3488 | struct nfs4_stateid *local; |
1da177e4 LT |
3489 | u32 st_id = stid->si_stateownerid; |
3490 | u32 f_id = stid->si_fileid; | |
3491 | unsigned int hashval; | |
3492 | ||
3493 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3494 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3495 | hashval = stateid_hashval(st_id, f_id); |
3496 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3497 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3498 | (local->st_stateid.si_fileid == f_id)) | |
3499 | return local; | |
3500 | } | |
3501 | } | |
9346eff0 KK |
3502 | |
3503 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3504 | hashval = stateid_hashval(st_id, f_id); |
3505 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3506 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3507 | (local->st_stateid.si_fileid == f_id)) | |
3508 | return local; | |
3509 | } | |
849823c5 | 3510 | } |
1da177e4 LT |
3511 | return NULL; |
3512 | } | |
3513 | ||
3514 | static struct nfs4_delegation * | |
3515 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3516 | { | |
13cd2184 N |
3517 | struct nfs4_file *fp; |
3518 | struct nfs4_delegation *dl; | |
1da177e4 | 3519 | |
8c10cbdb BH |
3520 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3521 | STATEID_VAL(stid)); | |
1da177e4 | 3522 | |
1da177e4 | 3523 | fp = find_file(ino); |
13cd2184 N |
3524 | if (!fp) |
3525 | return NULL; | |
3526 | dl = find_delegation_file(fp, stid); | |
3527 | put_nfs4_file(fp); | |
3528 | return dl; | |
1da177e4 LT |
3529 | } |
3530 | ||
3531 | /* | |
3532 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3533 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3534 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3535 | * locking, this prevents us from being completely protocol-compliant. The | |
3536 | * real solution to this problem is to start using unsigned file offsets in | |
3537 | * the VFS, but this is a very deep change! | |
3538 | */ | |
3539 | static inline void | |
3540 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3541 | { | |
3542 | if (lock->fl_start < 0) | |
3543 | lock->fl_start = OFFSET_MAX; | |
3544 | if (lock->fl_end < 0) | |
3545 | lock->fl_end = OFFSET_MAX; | |
3546 | } | |
3547 | ||
d5b9026a N |
3548 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3549 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3550 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3551 | }; |
1da177e4 LT |
3552 | |
3553 | static inline void | |
3554 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3555 | { | |
d5b9026a | 3556 | struct nfs4_stateowner *sop; |
1da177e4 | 3557 | |
d5b9026a N |
3558 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3559 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3560 | kref_get(&sop->so_ref); |
3561 | deny->ld_sop = sop; | |
3562 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3563 | } else { |
3564 | deny->ld_sop = NULL; | |
3565 | deny->ld_clientid.cl_boot = 0; | |
3566 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3567 | } |
3568 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3569 | deny->ld_length = NFS4_MAX_UINT64; |
3570 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3571 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3572 | deny->ld_type = NFS4_READ_LT; | |
3573 | if (fl->fl_type != F_RDLCK) | |
3574 | deny->ld_type = NFS4_WRITE_LT; | |
3575 | } | |
3576 | ||
1da177e4 LT |
3577 | static struct nfs4_stateowner * |
3578 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3579 | struct xdr_netobj *owner) | |
3580 | { | |
3581 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3582 | struct nfs4_stateowner *op; | |
3583 | ||
3584 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3585 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3586 | return op; |
3587 | } | |
3588 | return NULL; | |
3589 | } | |
3590 | ||
3591 | /* | |
3592 | * Alloc a lock owner structure. | |
3593 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3594 | * occured. | |
3595 | * | |
3596 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3597 | */ |
3598 | ||
3599 | static struct nfs4_stateowner * | |
3600 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3601 | struct nfs4_stateowner *sop; | |
3602 | struct nfs4_replay *rp; | |
3603 | unsigned int idhashval; | |
3604 | ||
3605 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3606 | return NULL; | |
3607 | idhashval = lockownerid_hashval(current_ownerid); | |
3608 | INIT_LIST_HEAD(&sop->so_idhash); | |
3609 | INIT_LIST_HEAD(&sop->so_strhash); | |
3610 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3611 | INIT_LIST_HEAD(&sop->so_stateids); |
3612 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3613 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3614 | sop->so_time = 0; | |
3615 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3616 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3617 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3618 | sop->so_is_open_owner = 0; |
3619 | sop->so_id = current_ownerid++; | |
3620 | sop->so_client = clp; | |
b59e3c0e NB |
3621 | /* It is the openowner seqid that will be incremented in encode in the |
3622 | * case of new lockowners; so increment the lock seqid manually: */ | |
3623 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3624 | sop->so_confirmed = 1; |
3625 | rp = &sop->so_replay; | |
de1ae286 | 3626 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3627 | rp->rp_buflen = 0; |
3628 | rp->rp_buf = rp->rp_ibuf; | |
3629 | return sop; | |
3630 | } | |
3631 | ||
fd39ca9a | 3632 | static struct nfs4_stateid * |
1da177e4 LT |
3633 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3634 | { | |
3635 | struct nfs4_stateid *stp; | |
3636 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3637 | ||
5ac049ac N |
3638 | stp = nfs4_alloc_stateid(); |
3639 | if (stp == NULL) | |
1da177e4 LT |
3640 | goto out; |
3641 | INIT_LIST_HEAD(&stp->st_hash); | |
3642 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3643 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3644 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3645 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3646 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3647 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3648 | stp->st_stateowner = sop; |
13cd2184 | 3649 | get_nfs4_file(fp); |
1da177e4 | 3650 | stp->st_file = fp; |
e4e83ea4 | 3651 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3652 | stp->st_stateid.si_stateownerid = sop->so_id; |
3653 | stp->st_stateid.si_fileid = fp->fi_id; | |
3654 | stp->st_stateid.si_generation = 0; | |
1da177e4 | 3655 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3656 | stp->st_openstp = open_stp; |
1da177e4 LT |
3657 | |
3658 | out: | |
3659 | return stp; | |
3660 | } | |
3661 | ||
fd39ca9a | 3662 | static int |
1da177e4 LT |
3663 | check_lock_length(u64 offset, u64 length) |
3664 | { | |
87df4de8 | 3665 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3666 | LOFF_OVERFLOW(offset, length))); |
3667 | } | |
3668 | ||
3669 | /* | |
3670 | * LOCK operation | |
3671 | */ | |
b37ad28b | 3672 | __be32 |
ca364317 | 3673 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3674 | struct nfsd4_lock *lock) |
1da177e4 | 3675 | { |
3e9e3dbe | 3676 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3677 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3678 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3679 | struct nfs4_file *fp; |
3680 | struct file *filp = NULL; | |
1da177e4 | 3681 | struct file_lock file_lock; |
8dc7c311 | 3682 | struct file_lock conflock; |
b37ad28b | 3683 | __be32 status = 0; |
1da177e4 | 3684 | unsigned int strhashval; |
150b3934 | 3685 | unsigned int cmd; |
b8dd7b9a | 3686 | int err; |
1da177e4 LT |
3687 | |
3688 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3689 | (long long) lock->lk_offset, | |
3690 | (long long) lock->lk_length); | |
3691 | ||
1da177e4 LT |
3692 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3693 | return nfserr_inval; | |
3694 | ||
ca364317 | 3695 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3696 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3697 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3698 | return status; | |
3699 | } | |
3700 | ||
1da177e4 LT |
3701 | nfs4_lock_state(); |
3702 | ||
3703 | if (lock->lk_is_new) { | |
893f8770 N |
3704 | /* |
3705 | * Client indicates that this is a new lockowner. | |
3706 | * Use open owner and open stateid to create lock owner and | |
3707 | * lock stateid. | |
3708 | */ | |
1da177e4 | 3709 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3710 | |
3711 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3712 | if (!nfsd4_has_session(cstate) && |
3713 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3714 | goto out; |
1da177e4 | 3715 | |
1da177e4 | 3716 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3717 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3718 | lock->lk_new_open_seqid, |
3719 | &lock->lk_new_open_stateid, | |
f3362737 | 3720 | OPEN_STATE, |
3a65588a | 3721 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3722 | lock); |
37515177 | 3723 | if (status) |
1da177e4 | 3724 | goto out; |
3a65588a | 3725 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3726 | /* create lockowner and lock stateid */ |
3727 | fp = open_stp->st_file; | |
3728 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3729 | open_sop->so_client->cl_clientid.cl_id, | |
3730 | &lock->v.new.owner); | |
3e9e3dbe N |
3731 | /* XXX: Do we need to check for duplicate stateowners on |
3732 | * the same file, or should they just be allowed (and | |
3733 | * create new stateids)? */ | |
1da177e4 | 3734 | status = nfserr_resource; |
b59e3c0e NB |
3735 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3736 | open_sop->so_client, open_stp, lock); | |
3737 | if (lock_sop == NULL) | |
1da177e4 | 3738 | goto out; |
b59e3c0e | 3739 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3740 | if (lock_stp == NULL) |
1da177e4 | 3741 | goto out; |
1da177e4 LT |
3742 | } else { |
3743 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3744 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3745 | lock->lk_old_lock_seqid, |
3746 | &lock->lk_old_lock_stateid, | |
f3362737 | 3747 | LOCK_STATE, |
3a65588a | 3748 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3749 | if (status) |
3750 | goto out; | |
3a65588a | 3751 | lock_sop = lock->lk_replay_owner; |
7d947842 | 3752 | fp = lock_stp->st_file; |
1da177e4 | 3753 | } |
3a65588a | 3754 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 3755 | |
0dd395dc | 3756 | status = nfserr_grace; |
af558e33 | 3757 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3758 | goto out; |
3759 | status = nfserr_no_grace; | |
af558e33 | 3760 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3761 | goto out; |
3762 | ||
1da177e4 LT |
3763 | locks_init_lock(&file_lock); |
3764 | switch (lock->lk_type) { | |
3765 | case NFS4_READ_LT: | |
3766 | case NFS4_READW_LT: | |
7d947842 BF |
3767 | if (find_readable_file(lock_stp->st_file)) { |
3768 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ); | |
3769 | filp = find_readable_file(lock_stp->st_file); | |
3770 | } | |
1da177e4 | 3771 | file_lock.fl_type = F_RDLCK; |
150b3934 | 3772 | cmd = F_SETLK; |
1da177e4 LT |
3773 | break; |
3774 | case NFS4_WRITE_LT: | |
3775 | case NFS4_WRITEW_LT: | |
7d947842 BF |
3776 | if (find_writeable_file(lock_stp->st_file)) { |
3777 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE); | |
3778 | filp = find_writeable_file(lock_stp->st_file); | |
3779 | } | |
1da177e4 | 3780 | file_lock.fl_type = F_WRLCK; |
150b3934 | 3781 | cmd = F_SETLK; |
1da177e4 LT |
3782 | break; |
3783 | default: | |
3784 | status = nfserr_inval; | |
3785 | goto out; | |
3786 | } | |
f9d7562f BF |
3787 | if (!filp) { |
3788 | status = nfserr_openmode; | |
3789 | goto out; | |
3790 | } | |
b59e3c0e | 3791 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3792 | file_lock.fl_pid = current->tgid; |
3793 | file_lock.fl_file = filp; | |
3794 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3795 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3796 | |
3797 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3798 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3799 | nfs4_transform_lock_offset(&file_lock); |
3800 | ||
3801 | /* | |
3802 | * Try to lock the file in the VFS. | |
3803 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3804 | */ | |
3805 | ||
fd85b817 | 3806 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3807 | switch (-err) { |
1da177e4 LT |
3808 | case 0: /* success! */ |
3809 | update_stateid(&lock_stp->st_stateid); | |
3810 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3811 | sizeof(stateid_t)); | |
b8dd7b9a | 3812 | status = 0; |
eb76b3fd AA |
3813 | break; |
3814 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3815 | status = nfserr_denied; | |
3816 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3817 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3818 | break; | |
1da177e4 LT |
3819 | case (EDEADLK): |
3820 | status = nfserr_deadlock; | |
eb76b3fd | 3821 | break; |
1da177e4 | 3822 | default: |
fd85b817 | 3823 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3824 | status = nfserr_resource; |
3825 | break; | |
1da177e4 | 3826 | } |
1da177e4 | 3827 | out: |
8a280510 | 3828 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3829 | release_lockowner(lock_sop); |
3a65588a BF |
3830 | if (lock->lk_replay_owner) { |
3831 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3832 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3833 | } |
1da177e4 LT |
3834 | nfs4_unlock_state(); |
3835 | return status; | |
3836 | } | |
3837 | ||
55ef1274 BF |
3838 | /* |
3839 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3840 | * so we do a temporary open here just to get an open file to pass to | |
3841 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3842 | * inode operation.) | |
3843 | */ | |
3844 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3845 | { | |
3846 | struct file *file; | |
3847 | int err; | |
3848 | ||
3849 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3850 | if (err) | |
3851 | return err; | |
3852 | err = vfs_test_lock(file, lock); | |
3853 | nfsd_close(file); | |
3854 | return err; | |
3855 | } | |
3856 | ||
1da177e4 LT |
3857 | /* |
3858 | * LOCKT operation | |
3859 | */ | |
b37ad28b | 3860 | __be32 |
ca364317 BF |
3861 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3862 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3863 | { |
3864 | struct inode *inode; | |
1da177e4 | 3865 | struct file_lock file_lock; |
fd85b817 | 3866 | int error; |
b37ad28b | 3867 | __be32 status; |
1da177e4 | 3868 | |
af558e33 | 3869 | if (locks_in_grace()) |
1da177e4 LT |
3870 | return nfserr_grace; |
3871 | ||
3872 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3873 | return nfserr_inval; | |
3874 | ||
3875 | lockt->lt_stateowner = NULL; | |
3876 | nfs4_lock_state(); | |
3877 | ||
3878 | status = nfserr_stale_clientid; | |
60adfc50 | 3879 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3880 | goto out; |
1da177e4 | 3881 | |
ca364317 | 3882 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3883 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3884 | if (status == nfserr_symlink) |
3885 | status = nfserr_inval; | |
3886 | goto out; | |
3887 | } | |
3888 | ||
ca364317 | 3889 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3890 | locks_init_lock(&file_lock); |
3891 | switch (lockt->lt_type) { | |
3892 | case NFS4_READ_LT: | |
3893 | case NFS4_READW_LT: | |
3894 | file_lock.fl_type = F_RDLCK; | |
3895 | break; | |
3896 | case NFS4_WRITE_LT: | |
3897 | case NFS4_WRITEW_LT: | |
3898 | file_lock.fl_type = F_WRLCK; | |
3899 | break; | |
3900 | default: | |
2fdada03 | 3901 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3902 | status = nfserr_inval; |
3903 | goto out; | |
3904 | } | |
3905 | ||
3906 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3907 | &lockt->lt_clientid, &lockt->lt_owner); | |
3908 | if (lockt->lt_stateowner) | |
3909 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3910 | file_lock.fl_pid = current->tgid; | |
3911 | file_lock.fl_flags = FL_POSIX; | |
3912 | ||
3913 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3914 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3915 | |
3916 | nfs4_transform_lock_offset(&file_lock); | |
3917 | ||
1da177e4 | 3918 | status = nfs_ok; |
55ef1274 | 3919 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3920 | if (error) { |
3921 | status = nfserrno(error); | |
3922 | goto out; | |
3923 | } | |
9d6a8c5c | 3924 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3925 | status = nfserr_denied; |
9d6a8c5c | 3926 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3927 | } |
3928 | out: | |
3929 | nfs4_unlock_state(); | |
3930 | return status; | |
3931 | } | |
3932 | ||
b37ad28b | 3933 | __be32 |
ca364317 | 3934 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3935 | struct nfsd4_locku *locku) |
1da177e4 LT |
3936 | { |
3937 | struct nfs4_stateid *stp; | |
3938 | struct file *filp = NULL; | |
3939 | struct file_lock file_lock; | |
b37ad28b | 3940 | __be32 status; |
b8dd7b9a | 3941 | int err; |
1da177e4 LT |
3942 | |
3943 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3944 | (long long) locku->lu_offset, | |
3945 | (long long) locku->lu_length); | |
3946 | ||
3947 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3948 | return nfserr_inval; | |
3949 | ||
3950 | nfs4_lock_state(); | |
3951 | ||
dd453dfd | 3952 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3953 | locku->lu_seqid, |
3954 | &locku->lu_stateid, | |
f3362737 | 3955 | LOCK_STATE, |
1da177e4 LT |
3956 | &locku->lu_stateowner, &stp, NULL))) |
3957 | goto out; | |
3958 | ||
f9d7562f BF |
3959 | filp = find_any_file(stp->st_file); |
3960 | if (!filp) { | |
3961 | status = nfserr_lock_range; | |
3962 | goto out; | |
3963 | } | |
1da177e4 LT |
3964 | BUG_ON(!filp); |
3965 | locks_init_lock(&file_lock); | |
3966 | file_lock.fl_type = F_UNLCK; | |
3967 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3968 | file_lock.fl_pid = current->tgid; | |
3969 | file_lock.fl_file = filp; | |
3970 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3971 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3972 | file_lock.fl_start = locku->lu_offset; |
3973 | ||
87df4de8 | 3974 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3975 | nfs4_transform_lock_offset(&file_lock); |
3976 | ||
3977 | /* | |
3978 | * Try to unlock the file in the VFS. | |
3979 | */ | |
fd85b817 | 3980 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3981 | if (err) { |
fd85b817 | 3982 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3983 | goto out_nfserr; |
3984 | } | |
3985 | /* | |
3986 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3987 | */ | |
3988 | update_stateid(&stp->st_stateid); | |
3989 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3990 | ||
3991 | out: | |
f2327d9a | 3992 | if (locku->lu_stateowner) { |
1da177e4 | 3993 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3994 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3995 | } |
1da177e4 LT |
3996 | nfs4_unlock_state(); |
3997 | return status; | |
3998 | ||
3999 | out_nfserr: | |
b8dd7b9a | 4000 | status = nfserrno(err); |
1da177e4 LT |
4001 | goto out; |
4002 | } | |
4003 | ||
4004 | /* | |
4005 | * returns | |
4006 | * 1: locks held by lockowner | |
4007 | * 0: no locks held by lockowner | |
4008 | */ | |
4009 | static int | |
f9d7562f | 4010 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4011 | { |
4012 | struct file_lock **flpp; | |
f9d7562f | 4013 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4014 | int status = 0; |
4015 | ||
4016 | lock_kernel(); | |
4017 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 4018 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4019 | status = 1; |
4020 | goto out; | |
796dadfd | 4021 | } |
1da177e4 LT |
4022 | } |
4023 | out: | |
4024 | unlock_kernel(); | |
4025 | return status; | |
4026 | } | |
4027 | ||
b37ad28b | 4028 | __be32 |
b591480b BF |
4029 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4030 | struct nfsd4_compound_state *cstate, | |
4031 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4032 | { |
4033 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4034 | struct nfs4_stateowner *sop; |
4035 | struct nfs4_stateid *stp; | |
1da177e4 | 4036 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4037 | struct list_head matches; |
4038 | int i; | |
b37ad28b | 4039 | __be32 status; |
1da177e4 LT |
4040 | |
4041 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4042 | clid->cl_boot, clid->cl_id); | |
4043 | ||
4044 | /* XXX check for lease expiration */ | |
4045 | ||
4046 | status = nfserr_stale_clientid; | |
849823c5 | 4047 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4048 | return status; |
1da177e4 LT |
4049 | |
4050 | nfs4_lock_state(); | |
4051 | ||
3e9e3dbe N |
4052 | status = nfserr_locks_held; |
4053 | /* XXX: we're doing a linear search through all the lockowners. | |
4054 | * Yipes! For now we'll just hope clients aren't really using | |
4055 | * release_lockowner much, but eventually we have to fix these | |
4056 | * data structures. */ | |
4057 | INIT_LIST_HEAD(&matches); | |
4058 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4059 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4060 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4061 | continue; |
4062 | list_for_each_entry(stp, &sop->so_stateids, | |
4063 | st_perstateowner) { | |
f9d7562f | 4064 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4065 | goto out; |
4066 | /* Note: so_perclient unused for lockowners, | |
4067 | * so it's OK to fool with here. */ | |
4068 | list_add(&sop->so_perclient, &matches); | |
4069 | } | |
1da177e4 | 4070 | } |
3e9e3dbe N |
4071 | } |
4072 | /* Clients probably won't expect us to return with some (but not all) | |
4073 | * of the lockowner state released; so don't release any until all | |
4074 | * have been checked. */ | |
4075 | status = nfs_ok; | |
0fa822e4 N |
4076 | while (!list_empty(&matches)) { |
4077 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4078 | so_perclient); | |
4079 | /* unhash_stateowner deletes so_perclient only | |
4080 | * for openowners. */ | |
4081 | list_del(&sop->so_perclient); | |
f044ff83 | 4082 | release_lockowner(sop); |
1da177e4 LT |
4083 | } |
4084 | out: | |
4085 | nfs4_unlock_state(); | |
4086 | return status; | |
4087 | } | |
4088 | ||
4089 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4090 | alloc_reclaim(void) |
1da177e4 | 4091 | { |
a55370a3 | 4092 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4093 | } |
4094 | ||
c7b9a459 | 4095 | int |
a1bcecd2 | 4096 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4097 | { |
4098 | unsigned int strhashval = clientstr_hashval(name); | |
4099 | struct nfs4_client *clp; | |
4100 | ||
a1bcecd2 | 4101 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
4102 | return clp ? 1 : 0; |
4103 | } | |
4104 | ||
1da177e4 LT |
4105 | /* |
4106 | * failure => all reset bets are off, nfserr_no_grace... | |
4107 | */ | |
190e4fbf N |
4108 | int |
4109 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4110 | { |
4111 | unsigned int strhashval; | |
4112 | struct nfs4_client_reclaim *crp = NULL; | |
4113 | ||
a55370a3 N |
4114 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4115 | crp = alloc_reclaim(); | |
1da177e4 LT |
4116 | if (!crp) |
4117 | return 0; | |
a55370a3 | 4118 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4119 | INIT_LIST_HEAD(&crp->cr_strhash); |
4120 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4121 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4122 | reclaim_str_hashtbl_size++; |
4123 | return 1; | |
4124 | } | |
4125 | ||
4126 | static void | |
4127 | nfs4_release_reclaim(void) | |
4128 | { | |
4129 | struct nfs4_client_reclaim *crp = NULL; | |
4130 | int i; | |
4131 | ||
1da177e4 LT |
4132 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4133 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4134 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4135 | struct nfs4_client_reclaim, cr_strhash); | |
4136 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4137 | kfree(crp); |
4138 | reclaim_str_hashtbl_size--; | |
4139 | } | |
4140 | } | |
4141 | BUG_ON(reclaim_str_hashtbl_size); | |
4142 | } | |
4143 | ||
4144 | /* | |
4145 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4146 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4147 | nfs4_find_reclaim_client(clientid_t *clid) |
4148 | { | |
4149 | unsigned int strhashval; | |
4150 | struct nfs4_client *clp; | |
4151 | struct nfs4_client_reclaim *crp = NULL; | |
4152 | ||
4153 | ||
4154 | /* find clientid in conf_id_hashtbl */ | |
4155 | clp = find_confirmed_client(clid); | |
4156 | if (clp == NULL) | |
4157 | return NULL; | |
4158 | ||
a55370a3 N |
4159 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4160 | clp->cl_name.len, clp->cl_name.data, | |
4161 | clp->cl_recdir); | |
1da177e4 LT |
4162 | |
4163 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4164 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4165 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4166 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4167 | return crp; |
4168 | } | |
4169 | } | |
4170 | return NULL; | |
4171 | } | |
4172 | ||
4173 | /* | |
4174 | * Called from OPEN. Look for clientid in reclaim list. | |
4175 | */ | |
b37ad28b | 4176 | __be32 |
1da177e4 LT |
4177 | nfs4_check_open_reclaim(clientid_t *clid) |
4178 | { | |
dfc83565 | 4179 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4180 | } |
4181 | ||
ac4d8ff2 | 4182 | /* initialization to perform at module load time: */ |
1da177e4 | 4183 | |
e8ff2a84 | 4184 | int |
ac4d8ff2 | 4185 | nfs4_state_init(void) |
1da177e4 | 4186 | { |
e8ff2a84 | 4187 | int i, status; |
1da177e4 | 4188 | |
e8ff2a84 BF |
4189 | status = nfsd4_init_slabs(); |
4190 | if (status) | |
4191 | return status; | |
1da177e4 LT |
4192 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4193 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4194 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4195 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4196 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4197 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4198 | } |
5282fd72 ME |
4199 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4200 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4201 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4202 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4203 | } | |
4204 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4205 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4206 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4207 | } | |
4208 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4209 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4210 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4211 | } | |
4212 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4213 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4214 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4215 | } | |
1da177e4 | 4216 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4217 | INIT_LIST_HEAD(&close_lru); |
4218 | INIT_LIST_HEAD(&client_lru); | |
4219 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4220 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4221 | return 0; |
ac4d8ff2 N |
4222 | } |
4223 | ||
190e4fbf N |
4224 | static void |
4225 | nfsd4_load_reboot_recovery_data(void) | |
4226 | { | |
4227 | int status; | |
4228 | ||
0964a3d3 N |
4229 | nfs4_lock_state(); |
4230 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4231 | status = nfsd4_recdir_load(); |
0964a3d3 | 4232 | nfs4_unlock_state(); |
190e4fbf N |
4233 | if (status) |
4234 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4235 | } | |
4236 | ||
c2f1a551 MS |
4237 | /* |
4238 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4239 | * client may quite reasonably hang on to a delegation as long as it has | |
4240 | * the inode cached. This becomes an obvious problem the first time a | |
4241 | * client's inode cache approaches the size of the server's total memory. | |
4242 | * | |
4243 | * For now we avoid this problem by imposing a hard limit on the number | |
4244 | * of delegations, which varies according to the server's memory size. | |
4245 | */ | |
4246 | static void | |
4247 | set_max_delegations(void) | |
4248 | { | |
4249 | /* | |
4250 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4251 | * estimates suggest that in the worst case (where every delegation | |
4252 | * is for a different inode), a delegation could take about 1.5K, | |
4253 | * giving a worst case usage of about 6% of memory. | |
4254 | */ | |
4255 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4256 | } | |
4257 | ||
ac4d8ff2 N |
4258 | /* initialization to perform when the nfsd service is started: */ |
4259 | ||
29ab23cc | 4260 | static int |
ac4d8ff2 N |
4261 | __nfs4_state_start(void) |
4262 | { | |
b5a1a81e BF |
4263 | int ret; |
4264 | ||
1da177e4 | 4265 | boot_time = get_seconds(); |
af558e33 | 4266 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4267 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4268 | nfsd4_grace); |
b5a1a81e BF |
4269 | ret = set_callback_cred(); |
4270 | if (ret) | |
4271 | return -ENOMEM; | |
58da282b | 4272 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4273 | if (laundry_wq == NULL) |
4274 | return -ENOMEM; | |
b5a1a81e BF |
4275 | ret = nfsd4_create_callback_queue(); |
4276 | if (ret) | |
4277 | goto out_free_laundry; | |
e46b498c | 4278 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4279 | set_max_delegations(); |
b5a1a81e BF |
4280 | return 0; |
4281 | out_free_laundry: | |
4282 | destroy_workqueue(laundry_wq); | |
4283 | return ret; | |
1da177e4 LT |
4284 | } |
4285 | ||
29ab23cc | 4286 | int |
76a3550e | 4287 | nfs4_state_start(void) |
1da177e4 | 4288 | { |
190e4fbf | 4289 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4290 | return __nfs4_state_start(); |
1da177e4 LT |
4291 | } |
4292 | ||
1da177e4 LT |
4293 | static void |
4294 | __nfs4_state_shutdown(void) | |
4295 | { | |
4296 | int i; | |
4297 | struct nfs4_client *clp = NULL; | |
4298 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4299 | struct list_head *pos, *next, reaplist; |
4300 | ||
1da177e4 LT |
4301 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4302 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4303 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4304 | expire_client(clp); | |
4305 | } | |
4306 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4307 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4308 | expire_client(clp); | |
4309 | } | |
4310 | } | |
4311 | INIT_LIST_HEAD(&reaplist); | |
4312 | spin_lock(&recall_lock); | |
4313 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4314 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4315 | list_move(&dp->dl_recall_lru, &reaplist); | |
4316 | } | |
4317 | spin_unlock(&recall_lock); | |
4318 | list_for_each_safe(pos, next, &reaplist) { | |
4319 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4320 | list_del_init(&dp->dl_recall_lru); | |
4321 | unhash_delegation(dp); | |
4322 | } | |
4323 | ||
190e4fbf | 4324 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4325 | } |
4326 | ||
4327 | void | |
4328 | nfs4_state_shutdown(void) | |
4329 | { | |
5e8d5c29 N |
4330 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4331 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4332 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4333 | nfs4_lock_state(); |
4334 | nfs4_release_reclaim(); | |
4335 | __nfs4_state_shutdown(); | |
1da177e4 | 4336 | nfs4_unlock_state(); |
c3935e30 | 4337 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4338 | } |
4339 | ||
3dd98a3b JL |
4340 | /* |
4341 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4342 | * accessed when nfsd is starting. | |
4343 | */ | |
0964a3d3 N |
4344 | static void |
4345 | nfs4_set_recdir(char *recdir) | |
4346 | { | |
0964a3d3 | 4347 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4348 | } |
4349 | ||
4350 | /* | |
4351 | * Change the NFSv4 recovery directory to recdir. | |
4352 | */ | |
4353 | int | |
4354 | nfs4_reset_recoverydir(char *recdir) | |
4355 | { | |
4356 | int status; | |
a63bb996 | 4357 | struct path path; |
0964a3d3 | 4358 | |
a63bb996 | 4359 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4360 | if (status) |
4361 | return status; | |
4362 | status = -ENOTDIR; | |
a63bb996 | 4363 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4364 | nfs4_set_recdir(recdir); |
4365 | status = 0; | |
4366 | } | |
a63bb996 | 4367 | path_put(&path); |
0964a3d3 N |
4368 | return status; |
4369 | } | |
4370 | ||
3dd98a3b JL |
4371 | char * |
4372 | nfs4_recoverydir(void) | |
4373 | { | |
4374 | return user_recovery_dirname; | |
4375 | } |