Commit | Line | Data |
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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> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
fd39ca9a N |
52 | static stateid_t zerostateid; /* bits all 0 */ |
53 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 54 | static u64 current_sessionid = 1; |
fd39ca9a N |
55 | |
56 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
57 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 58 | |
1da177e4 | 59 | /* forward declarations */ |
fe0750e5 | 60 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 61 | |
8b671b80 BF |
62 | /* Locking: */ |
63 | ||
64 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 65 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* |
68 | * Currently used for the del_recall_lru and file hash table. In an | |
69 | * effort to decrease the scope of the client_mutex, this spinlock may | |
70 | * eventually cover more: | |
71 | */ | |
72 | static DEFINE_SPINLOCK(recall_lock); | |
73 | ||
fe0750e5 BF |
74 | static struct kmem_cache *openowner_slab = NULL; |
75 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
76 | static struct kmem_cache *file_slab = NULL; |
77 | static struct kmem_cache *stateid_slab = NULL; | |
78 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 79 | |
1da177e4 LT |
80 | void |
81 | nfs4_lock_state(void) | |
82 | { | |
353ab6e9 | 83 | mutex_lock(&client_mutex); |
1da177e4 LT |
84 | } |
85 | ||
86 | void | |
87 | nfs4_unlock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_unlock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | static inline u32 | |
93 | opaque_hashval(const void *ptr, int nbytes) | |
94 | { | |
95 | unsigned char *cptr = (unsigned char *) ptr; | |
96 | ||
97 | u32 x = 0; | |
98 | while (nbytes--) { | |
99 | x *= 37; | |
100 | x += *cptr++; | |
101 | } | |
102 | return x; | |
103 | } | |
104 | ||
1da177e4 LT |
105 | static struct list_head del_recall_lru; |
106 | ||
32513b40 BF |
107 | static void nfsd4_free_file(struct nfs4_file *f) |
108 | { | |
109 | kmem_cache_free(file_slab, f); | |
110 | } | |
111 | ||
13cd2184 N |
112 | static inline void |
113 | put_nfs4_file(struct nfs4_file *fi) | |
114 | { | |
8b671b80 BF |
115 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
116 | list_del(&fi->fi_hash); | |
117 | spin_unlock(&recall_lock); | |
118 | iput(fi->fi_inode); | |
32513b40 | 119 | nfsd4_free_file(fi); |
8b671b80 | 120 | } |
13cd2184 N |
121 | } |
122 | ||
123 | static inline void | |
124 | get_nfs4_file(struct nfs4_file *fi) | |
125 | { | |
8b671b80 | 126 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
127 | } |
128 | ||
ef0f3390 | 129 | static int num_delegations; |
c2f1a551 | 130 | unsigned int max_delegations; |
ef0f3390 N |
131 | |
132 | /* | |
133 | * Open owner state (share locks) | |
134 | */ | |
135 | ||
16bfdaaf BF |
136 | /* hash tables for lock and open owners */ |
137 | #define OWNER_HASH_BITS 8 | |
138 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
139 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 140 | |
16bfdaaf | 141 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
142 | { |
143 | unsigned int ret; | |
144 | ||
145 | ret = opaque_hashval(ownername->data, ownername->len); | |
146 | ret += clientid; | |
16bfdaaf | 147 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 148 | } |
ef0f3390 | 149 | |
16bfdaaf | 150 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
151 | |
152 | /* hash table for nfs4_file */ | |
153 | #define FILE_HASH_BITS 8 | |
154 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 155 | |
ddc04c41 BF |
156 | static unsigned int file_hashval(struct inode *ino) |
157 | { | |
158 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
159 | return hash_ptr(ino, FILE_HASH_BITS); | |
160 | } | |
161 | ||
ef0f3390 | 162 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 163 | |
998db52c | 164 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
165 | { |
166 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
167 | atomic_inc(&fp->fi_access[oflag]); | |
168 | } | |
169 | ||
998db52c BF |
170 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
171 | { | |
172 | if (oflag == O_RDWR) { | |
173 | __nfs4_file_get_access(fp, O_RDONLY); | |
174 | __nfs4_file_get_access(fp, O_WRONLY); | |
175 | } else | |
176 | __nfs4_file_get_access(fp, oflag); | |
177 | } | |
178 | ||
179 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
180 | { |
181 | if (fp->fi_fds[oflag]) { | |
182 | fput(fp->fi_fds[oflag]); | |
183 | fp->fi_fds[oflag] = NULL; | |
184 | } | |
185 | } | |
186 | ||
998db52c | 187 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
188 | { |
189 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 190 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
191 | /* |
192 | * It's also safe to get rid of the RDWR open *if* | |
193 | * we no longer have need of the other kind of access | |
194 | * or if we already have the other kind of open: | |
195 | */ | |
196 | if (fp->fi_fds[1-oflag] | |
197 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
198 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
199 | } |
200 | } | |
201 | ||
998db52c BF |
202 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
203 | { | |
204 | if (oflag == O_RDWR) { | |
205 | __nfs4_file_put_access(fp, O_RDONLY); | |
206 | __nfs4_file_put_access(fp, O_WRONLY); | |
207 | } else | |
208 | __nfs4_file_put_access(fp, oflag); | |
209 | } | |
210 | ||
6136d2b4 | 211 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 212 | { |
6136d2b4 | 213 | static int min_stateid = 0; |
38c2f4b1 | 214 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
215 | int new_stid; |
216 | int error; | |
217 | ||
38c2f4b1 | 218 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 219 | /* |
996e0938 BF |
220 | * Note: the necessary preallocation was done in |
221 | * nfs4_alloc_stateid(). The idr code caps the number of | |
222 | * preallocations that can exist at a time, but the state lock | |
223 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
224 | */ |
225 | BUG_ON(error); | |
226 | /* | |
227 | * It shouldn't be a problem to reuse an opaque stateid value. | |
228 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
229 | * example, a stray write retransmission could be accepted by | |
230 | * the server when it should have been rejected. Therefore, | |
231 | * adopt a trick from the sctp code to attempt to maximize the | |
232 | * amount of time until an id is reused, by ensuring they always | |
233 | * "increase" (mod INT_MAX): | |
234 | */ | |
36d44c60 | 235 | |
6136d2b4 BF |
236 | min_stateid = new_stid+1; |
237 | if (min_stateid == INT_MAX) | |
238 | min_stateid = 0; | |
239 | return new_stid; | |
36d44c60 BF |
240 | } |
241 | ||
996e0938 | 242 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
243 | { |
244 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 245 | int new_id; |
2a74aba7 BF |
246 | |
247 | stid->sc_type = type; | |
248 | stid->sc_client = cl; | |
249 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 250 | new_id = get_new_stid(stid); |
6136d2b4 | 251 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
252 | /* Will be incremented before return to client: */ |
253 | s->si_generation = 0; | |
996e0938 BF |
254 | } |
255 | ||
256 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
257 | { | |
258 | struct idr *stateids = &cl->cl_stateids; | |
259 | ||
260 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
261 | return NULL; | |
262 | /* | |
263 | * Note: if we fail here (or any time between now and the time | |
264 | * we actually get the new idr), we won't need to undo the idr | |
265 | * preallocation, since the idr code caps the number of | |
266 | * preallocated entries. | |
267 | */ | |
268 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
269 | } |
270 | ||
4cdc951b BF |
271 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
272 | { | |
273 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
274 | } | |
275 | ||
1da177e4 | 276 | static struct nfs4_delegation * |
dcef0413 | 277 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
278 | { |
279 | struct nfs4_delegation *dp; | |
280 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
281 | |
282 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
283 | /* |
284 | * Major work on the lease subsystem (for example, to support | |
285 | * calbacks on stat) will be required before we can support | |
286 | * write delegations properly. | |
287 | */ | |
288 | if (type != NFS4_OPEN_DELEGATE_READ) | |
289 | return NULL; | |
47f9940c MS |
290 | if (fp->fi_had_conflict) |
291 | return NULL; | |
c2f1a551 | 292 | if (num_delegations > max_delegations) |
ef0f3390 | 293 | return NULL; |
996e0938 | 294 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 295 | if (dp == NULL) |
1da177e4 | 296 | return dp; |
996e0938 | 297 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
298 | /* |
299 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
300 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
301 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
302 | */ |
303 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 304 | num_delegations++; |
ea1da636 N |
305 | INIT_LIST_HEAD(&dp->dl_perfile); |
306 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 307 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 308 | get_nfs4_file(fp); |
1da177e4 | 309 | dp->dl_file = fp; |
1da177e4 | 310 | dp->dl_type = type; |
6c02eaa1 | 311 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
312 | dp->dl_time = 0; |
313 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 314 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
315 | return dp; |
316 | } | |
317 | ||
318 | void | |
319 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
320 | { | |
321 | if (atomic_dec_and_test(&dp->dl_count)) { | |
322 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 323 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 324 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 325 | num_delegations--; |
1da177e4 LT |
326 | } |
327 | } | |
328 | ||
acfdf5c3 | 329 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 330 | { |
acfdf5c3 BF |
331 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
332 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
333 | fp->fi_lease = NULL; | |
4ee63624 | 334 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
335 | fp->fi_deleg_file = NULL; |
336 | } | |
1da177e4 LT |
337 | } |
338 | ||
6136d2b4 BF |
339 | static void unhash_stid(struct nfs4_stid *s) |
340 | { | |
38c2f4b1 BF |
341 | struct idr *stateids = &s->sc_client->cl_stateids; |
342 | ||
343 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
344 | } |
345 | ||
1da177e4 LT |
346 | /* Called under the state lock. */ |
347 | static void | |
348 | unhash_delegation(struct nfs4_delegation *dp) | |
349 | { | |
6136d2b4 | 350 | unhash_stid(&dp->dl_stid); |
ea1da636 | 351 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 352 | spin_lock(&recall_lock); |
5d926e8c | 353 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
354 | list_del_init(&dp->dl_recall_lru); |
355 | spin_unlock(&recall_lock); | |
acfdf5c3 | 356 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
357 | nfs4_put_delegation(dp); |
358 | } | |
359 | ||
360 | /* | |
361 | * SETCLIENTID state | |
362 | */ | |
363 | ||
36acb66b | 364 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
365 | static DEFINE_SPINLOCK(client_lock); |
366 | ||
1da177e4 LT |
367 | /* Hash tables for nfs4_clientid state */ |
368 | #define CLIENT_HASH_BITS 4 | |
369 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
370 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
371 | ||
ddc04c41 BF |
372 | static unsigned int clientid_hashval(u32 id) |
373 | { | |
374 | return id & CLIENT_HASH_MASK; | |
375 | } | |
376 | ||
377 | static unsigned int clientstr_hashval(const char *name) | |
378 | { | |
379 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
380 | } | |
381 | ||
1da177e4 LT |
382 | /* |
383 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
384 | * used in reboot/reset lease grace period processing | |
385 | * | |
386 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
387 | * setclientid_confirmed info. | |
388 | * | |
389 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
390 | * setclientid info. | |
391 | * | |
392 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
393 | * for lease renewal. | |
394 | * | |
395 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
396 | * for last close replay. | |
397 | */ | |
398 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
399 | static int reclaim_str_hashtbl_size = 0; | |
400 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
401 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
402 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
403 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
404 | static struct list_head client_lru; | |
405 | static struct list_head close_lru; | |
406 | ||
f9d7562f BF |
407 | /* |
408 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
409 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
410 | * only what share bits are currently in force, but also what | |
411 | * combinations of share bits previous opens have used. This allows us | |
412 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
413 | * return an error if the client attempt to downgrade to a combination | |
414 | * of share bits not explicable by closing some of its previous opens. | |
415 | * | |
416 | * XXX: This enforcement is actually incomplete, since we don't keep | |
417 | * track of access/deny bit combinations; so, e.g., we allow: | |
418 | * | |
419 | * OPEN allow read, deny write | |
420 | * OPEN allow both, deny none | |
421 | * DOWNGRADE allow read, deny none | |
422 | * | |
423 | * which we should reject. | |
424 | */ | |
425 | static void | |
426 | set_access(unsigned int *access, unsigned long bmap) { | |
427 | int i; | |
428 | ||
429 | *access = 0; | |
430 | for (i = 1; i < 4; i++) { | |
431 | if (test_bit(i, &bmap)) | |
432 | *access |= i; | |
433 | } | |
434 | } | |
435 | ||
436 | static void | |
437 | set_deny(unsigned int *deny, unsigned long bmap) { | |
438 | int i; | |
439 | ||
440 | *deny = 0; | |
441 | for (i = 0; i < 4; i++) { | |
442 | if (test_bit(i, &bmap)) | |
443 | *deny |= i ; | |
444 | } | |
445 | } | |
446 | ||
447 | static int | |
dcef0413 | 448 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
449 | unsigned int access, deny; |
450 | ||
451 | set_access(&access, stp->st_access_bmap); | |
452 | set_deny(&deny, stp->st_deny_bmap); | |
453 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
454 | return 0; | |
455 | return 1; | |
456 | } | |
457 | ||
458 | static int nfs4_access_to_omode(u32 access) | |
459 | { | |
8f34a430 | 460 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
461 | case NFS4_SHARE_ACCESS_READ: |
462 | return O_RDONLY; | |
463 | case NFS4_SHARE_ACCESS_WRITE: | |
464 | return O_WRONLY; | |
465 | case NFS4_SHARE_ACCESS_BOTH: | |
466 | return O_RDWR; | |
467 | } | |
468 | BUG(); | |
469 | } | |
470 | ||
dcef0413 | 471 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 472 | { |
529d7b2a BF |
473 | list_del(&stp->st_perfile); |
474 | list_del(&stp->st_perstateowner); | |
475 | } | |
476 | ||
dcef0413 | 477 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 478 | { |
499f3edc | 479 | int i; |
0997b173 | 480 | |
23fcf2ec | 481 | if (stp->st_access_bmap) { |
499f3edc BF |
482 | for (i = 1; i < 4; i++) { |
483 | if (test_bit(i, &stp->st_access_bmap)) | |
484 | nfs4_file_put_access(stp->st_file, | |
485 | nfs4_access_to_omode(i)); | |
4665e2ba | 486 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 487 | } |
23fcf2ec | 488 | } |
a96e5b90 | 489 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
490 | stp->st_file = NULL; |
491 | } | |
492 | ||
dcef0413 | 493 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 494 | { |
529d7b2a BF |
495 | kmem_cache_free(stateid_slab, stp); |
496 | } | |
497 | ||
dcef0413 | 498 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
499 | { |
500 | struct file *file; | |
501 | ||
502 | unhash_generic_stateid(stp); | |
6136d2b4 | 503 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
504 | file = find_any_file(stp->st_file); |
505 | if (file) | |
fe0750e5 | 506 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 507 | close_generic_stateid(stp); |
529d7b2a BF |
508 | free_generic_stateid(stp); |
509 | } | |
510 | ||
fe0750e5 | 511 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 512 | { |
dcef0413 | 513 | struct nfs4_ol_stateid *stp; |
529d7b2a | 514 | |
fe0750e5 BF |
515 | list_del(&lo->lo_owner.so_strhash); |
516 | list_del(&lo->lo_perstateid); | |
009673b4 | 517 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
518 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
519 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 520 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
521 | release_lock_stateid(stp); |
522 | } | |
523 | } | |
524 | ||
fe0750e5 | 525 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 526 | { |
fe0750e5 BF |
527 | unhash_lockowner(lo); |
528 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
529 | } |
530 | ||
531 | static void | |
dcef0413 | 532 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 533 | { |
fe0750e5 | 534 | struct nfs4_lockowner *lo; |
529d7b2a BF |
535 | |
536 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
537 | lo = list_entry(open_stp->st_lockowners.next, |
538 | struct nfs4_lockowner, lo_perstateid); | |
539 | release_lockowner(lo); | |
529d7b2a BF |
540 | } |
541 | } | |
542 | ||
38c387b5 | 543 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
544 | { |
545 | unhash_generic_stateid(stp); | |
546 | release_stateid_lockowners(stp); | |
38c387b5 BF |
547 | close_generic_stateid(stp); |
548 | } | |
549 | ||
550 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
551 | { | |
552 | unhash_open_stateid(stp); | |
6136d2b4 | 553 | unhash_stid(&stp->st_stid); |
2283963f BF |
554 | free_generic_stateid(stp); |
555 | } | |
556 | ||
fe0750e5 | 557 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 558 | { |
dcef0413 | 559 | struct nfs4_ol_stateid *stp; |
f1d110ca | 560 | |
fe0750e5 BF |
561 | list_del(&oo->oo_owner.so_strhash); |
562 | list_del(&oo->oo_perclient); | |
563 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
564 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 565 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 566 | release_open_stateid(stp); |
f1d110ca BF |
567 | } |
568 | } | |
569 | ||
f7a4d872 BF |
570 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
571 | { | |
572 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
573 | ||
574 | if (s) { | |
6136d2b4 | 575 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
576 | free_generic_stateid(s); |
577 | oo->oo_last_closed_stid = NULL; | |
578 | } | |
579 | } | |
580 | ||
fe0750e5 | 581 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 582 | { |
fe0750e5 BF |
583 | unhash_openowner(oo); |
584 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 585 | release_last_closed_stateid(oo); |
fe0750e5 | 586 | nfs4_free_openowner(oo); |
f1d110ca BF |
587 | } |
588 | ||
5282fd72 ME |
589 | #define SESSION_HASH_SIZE 512 |
590 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
591 | ||
592 | static inline int | |
593 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
594 | { | |
595 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
596 | ||
597 | return sid->sequence % SESSION_HASH_SIZE; | |
598 | } | |
599 | ||
600 | static inline void | |
601 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
602 | { | |
603 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
604 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
605 | } | |
606 | ||
ec6b5d7b AA |
607 | static void |
608 | gen_sessionid(struct nfsd4_session *ses) | |
609 | { | |
610 | struct nfs4_client *clp = ses->se_client; | |
611 | struct nfsd4_sessionid *sid; | |
612 | ||
613 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
614 | sid->clientid = clp->cl_clientid; | |
615 | sid->sequence = current_sessionid++; | |
616 | sid->reserved = 0; | |
617 | } | |
618 | ||
619 | /* | |
a649637c AA |
620 | * The protocol defines ca_maxresponssize_cached to include the size of |
621 | * the rpc header, but all we need to cache is the data starting after | |
622 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
623 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
624 | * value that is the number of bytes in our cache plus a few additional | |
625 | * bytes. In order to stay on the safe side, and not promise more than | |
626 | * we can cache, those additional bytes must be the minimum possible: 24 | |
627 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
628 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
629 | * for the SEQUENCE op response: | |
630 | */ | |
631 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
632 | ||
557ce264 AA |
633 | static void |
634 | free_session_slots(struct nfsd4_session *ses) | |
635 | { | |
636 | int i; | |
637 | ||
638 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
639 | kfree(ses->se_slots[i]); | |
640 | } | |
641 | ||
a649637c | 642 | /* |
efe0cb6d BF |
643 | * We don't actually need to cache the rpc and session headers, so we |
644 | * can allocate a little less for each slot: | |
645 | */ | |
646 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
647 | { | |
648 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
649 | } | |
650 | ||
5b6feee9 | 651 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 652 | { |
5b6feee9 BF |
653 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
654 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 655 | |
5b6feee9 BF |
656 | return size; |
657 | } | |
ec6b5d7b | 658 | |
5b6feee9 BF |
659 | /* |
660 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
661 | * re-negotiate active sessions and reduce their slot usage to make |
662 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 663 | */ |
5b6feee9 | 664 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 665 | { |
5b6feee9 | 666 | int avail; |
ec6b5d7b | 667 | |
5b6feee9 | 668 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 669 | |
5b6feee9 BF |
670 | spin_lock(&nfsd_drc_lock); |
671 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
672 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
673 | num = min_t(int, num, avail / slotsize); | |
674 | nfsd_drc_mem_used += num * slotsize; | |
675 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 676 | |
5b6feee9 BF |
677 | return num; |
678 | } | |
ec6b5d7b | 679 | |
5b6feee9 BF |
680 | static void nfsd4_put_drc_mem(int slotsize, int num) |
681 | { | |
4bd9b0f4 | 682 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 683 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 684 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 685 | } |
ec6b5d7b | 686 | |
5b6feee9 BF |
687 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
688 | { | |
689 | struct nfsd4_session *new; | |
690 | int mem, i; | |
a649637c | 691 | |
5b6feee9 BF |
692 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
693 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
694 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 695 | |
5b6feee9 BF |
696 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
697 | if (!new) | |
698 | return NULL; | |
557ce264 | 699 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
700 | for (i = 0; i < numslots; i++) { |
701 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
702 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
703 | if (!new->se_slots[i]) | |
557ce264 | 704 | goto out_free; |
557ce264 | 705 | } |
5b6feee9 BF |
706 | return new; |
707 | out_free: | |
708 | while (i--) | |
709 | kfree(new->se_slots[i]); | |
710 | kfree(new); | |
711 | return NULL; | |
ec6b5d7b AA |
712 | } |
713 | ||
5b6feee9 | 714 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 715 | { |
5b6feee9 | 716 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 717 | |
5b6feee9 | 718 | new->maxreqs = numslots; |
d2b21743 MJ |
719 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
720 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
721 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
722 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
723 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
724 | } | |
ec6b5d7b | 725 | |
19cf5c02 BF |
726 | static void free_conn(struct nfsd4_conn *c) |
727 | { | |
728 | svc_xprt_put(c->cn_xprt); | |
729 | kfree(c); | |
730 | } | |
ec6b5d7b | 731 | |
19cf5c02 BF |
732 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
733 | { | |
734 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
735 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 736 | |
19cf5c02 BF |
737 | spin_lock(&clp->cl_lock); |
738 | if (!list_empty(&c->cn_persession)) { | |
739 | list_del(&c->cn_persession); | |
740 | free_conn(c); | |
741 | } | |
742 | spin_unlock(&clp->cl_lock); | |
eea49806 | 743 | nfsd4_probe_callback(clp); |
19cf5c02 | 744 | } |
ec6b5d7b | 745 | |
d29c374c | 746 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 747 | { |
c7662518 | 748 | struct nfsd4_conn *conn; |
ec6b5d7b | 749 | |
c7662518 BF |
750 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
751 | if (!conn) | |
db90681d | 752 | return NULL; |
c7662518 BF |
753 | svc_xprt_get(rqstp->rq_xprt); |
754 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 755 | conn->cn_flags = flags; |
db90681d BF |
756 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
757 | return conn; | |
758 | } | |
a649637c | 759 | |
328ead28 BF |
760 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
761 | { | |
762 | conn->cn_session = ses; | |
763 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
764 | } |
765 | ||
db90681d | 766 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 767 | { |
db90681d | 768 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 769 | |
c7662518 | 770 | spin_lock(&clp->cl_lock); |
328ead28 | 771 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 772 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
773 | } |
774 | ||
21b75b01 | 775 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 776 | { |
19cf5c02 | 777 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 778 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
779 | } |
780 | ||
1d1bc8f2 | 781 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 782 | { |
db90681d | 783 | struct nfsd4_conn *conn; |
21b75b01 | 784 | int ret; |
ec6b5d7b | 785 | |
1d1bc8f2 | 786 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
787 | if (!conn) |
788 | return nfserr_jukebox; | |
789 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
790 | ret = nfsd4_register_conn(conn); |
791 | if (ret) | |
792 | /* oops; xprt is already down: */ | |
793 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
794 | return nfs_ok; |
795 | } | |
ec6b5d7b | 796 | |
1d1bc8f2 BF |
797 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
798 | { | |
799 | u32 dir = NFS4_CDFC4_FORE; | |
800 | ||
801 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
802 | dir |= NFS4_CDFC4_BACK; | |
803 | ||
804 | return nfsd4_new_conn(rqstp, ses, dir); | |
805 | } | |
806 | ||
807 | /* must be called under client_lock */ | |
19cf5c02 | 808 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 809 | { |
19cf5c02 BF |
810 | struct nfs4_client *clp = s->se_client; |
811 | struct nfsd4_conn *c; | |
ec6b5d7b | 812 | |
19cf5c02 BF |
813 | spin_lock(&clp->cl_lock); |
814 | while (!list_empty(&s->se_conns)) { | |
815 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
816 | list_del_init(&c->cn_persession); | |
817 | spin_unlock(&clp->cl_lock); | |
557ce264 | 818 | |
19cf5c02 BF |
819 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
820 | free_conn(c); | |
ec6b5d7b | 821 | |
19cf5c02 BF |
822 | spin_lock(&clp->cl_lock); |
823 | } | |
824 | spin_unlock(&clp->cl_lock); | |
c7662518 | 825 | } |
ec6b5d7b | 826 | |
c7662518 BF |
827 | void free_session(struct kref *kref) |
828 | { | |
829 | struct nfsd4_session *ses; | |
830 | int mem; | |
831 | ||
832 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 833 | nfsd4_del_conns(ses); |
c7662518 BF |
834 | spin_lock(&nfsd_drc_lock); |
835 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
836 | nfsd_drc_mem_used -= mem; | |
837 | spin_unlock(&nfsd_drc_lock); | |
838 | free_session_slots(ses); | |
839 | kfree(ses); | |
840 | } | |
841 | ||
ac7c46f2 | 842 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
843 | { |
844 | struct nfsd4_session *new; | |
845 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
846 | int numslots, slotsize; | |
c7662518 | 847 | int status; |
5b6feee9 BF |
848 | int idx; |
849 | ||
850 | /* | |
851 | * Note decreasing slot size below client's request may | |
852 | * make it difficult for client to function correctly, whereas | |
853 | * decreasing the number of slots will (just?) affect | |
854 | * performance. When short on memory we therefore prefer to | |
855 | * decrease number of slots instead of their size. | |
856 | */ | |
857 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
858 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
859 | if (numslots < 1) |
860 | return NULL; | |
5b6feee9 BF |
861 | |
862 | new = alloc_session(slotsize, numslots); | |
863 | if (!new) { | |
864 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 865 | return NULL; |
557ce264 | 866 | } |
5b6feee9 | 867 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 868 | |
ec6b5d7b AA |
869 | new->se_client = clp; |
870 | gen_sessionid(new); | |
ec6b5d7b | 871 | |
c7662518 BF |
872 | INIT_LIST_HEAD(&new->se_conns); |
873 | ||
ac7c46f2 | 874 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 875 | new->se_flags = cses->flags; |
8b5ce5cd | 876 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 877 | kref_init(&new->se_ref); |
5b6feee9 | 878 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 879 | spin_lock(&client_lock); |
ec6b5d7b | 880 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 881 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 882 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 883 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 884 | spin_unlock(&client_lock); |
ec6b5d7b | 885 | |
1d1bc8f2 | 886 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 887 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
888 | if (status) { |
889 | free_session(&new->se_ref); | |
ac7c46f2 | 890 | return NULL; |
c7662518 | 891 | } |
dcbeaa68 | 892 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 893 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
894 | /* |
895 | * This is a little silly; with sessions there's no real | |
896 | * use for the callback address. Use the peer address | |
897 | * as a reasonable default for now, but consider fixing | |
898 | * the rpc client not to require an address in the | |
899 | * future: | |
900 | */ | |
edd76786 BF |
901 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
902 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 903 | } |
dcbeaa68 | 904 | nfsd4_probe_callback(clp); |
ac7c46f2 | 905 | return new; |
ec6b5d7b AA |
906 | } |
907 | ||
9089f1b4 | 908 | /* caller must hold client_lock */ |
5282fd72 ME |
909 | static struct nfsd4_session * |
910 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
911 | { | |
912 | struct nfsd4_session *elem; | |
913 | int idx; | |
914 | ||
915 | dump_sessionid(__func__, sessionid); | |
916 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
917 | /* Search in the appropriate list */ |
918 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
919 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
920 | NFS4_MAX_SESSIONID_LEN)) { | |
921 | return elem; | |
922 | } | |
923 | } | |
924 | ||
925 | dprintk("%s: session not found\n", __func__); | |
926 | return NULL; | |
927 | } | |
928 | ||
9089f1b4 | 929 | /* caller must hold client_lock */ |
7116ed6b | 930 | static void |
5282fd72 | 931 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
932 | { |
933 | list_del(&ses->se_hash); | |
4c649378 | 934 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 935 | list_del(&ses->se_perclnt); |
4c649378 | 936 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
937 | } |
938 | ||
36acb66b | 939 | /* must be called under the client_lock */ |
1da177e4 | 940 | static inline void |
36acb66b | 941 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 942 | { |
07cd4909 BH |
943 | if (is_client_expired(clp)) { |
944 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
945 | __func__, | |
946 | clp->cl_clientid.cl_boot, | |
947 | clp->cl_clientid.cl_id); | |
948 | return; | |
949 | } | |
950 | ||
1da177e4 LT |
951 | dprintk("renewing client (clientid %08x/%08x)\n", |
952 | clp->cl_clientid.cl_boot, | |
953 | clp->cl_clientid.cl_id); | |
954 | list_move_tail(&clp->cl_lru, &client_lru); | |
955 | clp->cl_time = get_seconds(); | |
956 | } | |
957 | ||
36acb66b BH |
958 | static inline void |
959 | renew_client(struct nfs4_client *clp) | |
960 | { | |
961 | spin_lock(&client_lock); | |
962 | renew_client_locked(clp); | |
963 | spin_unlock(&client_lock); | |
964 | } | |
965 | ||
1da177e4 LT |
966 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
967 | static int | |
968 | STALE_CLIENTID(clientid_t *clid) | |
969 | { | |
970 | if (clid->cl_boot == boot_time) | |
971 | return 0; | |
60adfc50 AA |
972 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
973 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
974 | return 1; |
975 | } | |
976 | ||
977 | /* | |
978 | * XXX Should we use a slab cache ? | |
979 | * This type of memory management is somewhat inefficient, but we use it | |
980 | * anyway since SETCLIENTID is not a common operation. | |
981 | */ | |
35bba9a3 | 982 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
983 | { |
984 | struct nfs4_client *clp; | |
985 | ||
35bba9a3 BF |
986 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
987 | if (clp == NULL) | |
988 | return NULL; | |
989 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
990 | if (clp->cl_name.data == NULL) { | |
991 | kfree(clp); | |
992 | return NULL; | |
1da177e4 | 993 | } |
35bba9a3 BF |
994 | memcpy(clp->cl_name.data, name.data, name.len); |
995 | clp->cl_name.len = name.len; | |
1da177e4 LT |
996 | return clp; |
997 | } | |
998 | ||
999 | static inline void | |
1000 | free_client(struct nfs4_client *clp) | |
1001 | { | |
792c95dd BF |
1002 | while (!list_empty(&clp->cl_sessions)) { |
1003 | struct nfsd4_session *ses; | |
1004 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1005 | se_perclnt); | |
1006 | list_del(&ses->se_perclnt); | |
1007 | nfsd4_put_session(ses); | |
1008 | } | |
1da177e4 LT |
1009 | if (clp->cl_cred.cr_group_info) |
1010 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 1011 | kfree(clp->cl_principal); |
1da177e4 LT |
1012 | kfree(clp->cl_name.data); |
1013 | kfree(clp); | |
1014 | } | |
1015 | ||
d7682988 BH |
1016 | void |
1017 | release_session_client(struct nfsd4_session *session) | |
1018 | { | |
1019 | struct nfs4_client *clp = session->se_client; | |
1020 | ||
1021 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1022 | return; | |
1023 | if (is_client_expired(clp)) { | |
1024 | free_client(clp); | |
1025 | session->se_client = NULL; | |
1026 | } else | |
1027 | renew_client_locked(clp); | |
1028 | spin_unlock(&client_lock); | |
d7682988 BH |
1029 | } |
1030 | ||
84d38ac9 BH |
1031 | /* must be called under the client_lock */ |
1032 | static inline void | |
1033 | unhash_client_locked(struct nfs4_client *clp) | |
1034 | { | |
792c95dd BF |
1035 | struct nfsd4_session *ses; |
1036 | ||
07cd4909 | 1037 | mark_client_expired(clp); |
84d38ac9 | 1038 | list_del(&clp->cl_lru); |
4c649378 | 1039 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1040 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1041 | list_del_init(&ses->se_hash); | |
4c649378 | 1042 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1043 | } |
1044 | ||
1da177e4 LT |
1045 | static void |
1046 | expire_client(struct nfs4_client *clp) | |
1047 | { | |
fe0750e5 | 1048 | struct nfs4_openowner *oo; |
1da177e4 | 1049 | struct nfs4_delegation *dp; |
1da177e4 LT |
1050 | struct list_head reaplist; |
1051 | ||
1da177e4 LT |
1052 | INIT_LIST_HEAD(&reaplist); |
1053 | spin_lock(&recall_lock); | |
ea1da636 N |
1054 | while (!list_empty(&clp->cl_delegations)) { |
1055 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1056 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1057 | list_move(&dp->dl_recall_lru, &reaplist); |
1058 | } | |
1059 | spin_unlock(&recall_lock); | |
1060 | while (!list_empty(&reaplist)) { | |
1061 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1062 | list_del_init(&dp->dl_recall_lru); | |
1063 | unhash_delegation(dp); | |
1064 | } | |
ea1da636 | 1065 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1066 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1067 | release_openowner(oo); | |
1da177e4 | 1068 | } |
6ff8da08 | 1069 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1070 | if (clp->cl_cb_conn.cb_xprt) |
1071 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1072 | list_del(&clp->cl_idhash); |
1073 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1074 | spin_lock(&client_lock); |
84d38ac9 | 1075 | unhash_client_locked(clp); |
46583e25 BH |
1076 | if (atomic_read(&clp->cl_refcount) == 0) |
1077 | free_client(clp); | |
be1fdf6c | 1078 | spin_unlock(&client_lock); |
1da177e4 LT |
1079 | } |
1080 | ||
35bba9a3 BF |
1081 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1082 | { | |
1083 | memcpy(target->cl_verifier.data, source->data, | |
1084 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1085 | } |
1086 | ||
35bba9a3 BF |
1087 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1088 | { | |
1da177e4 LT |
1089 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1090 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1091 | } | |
1092 | ||
35bba9a3 BF |
1093 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1094 | { | |
1da177e4 LT |
1095 | target->cr_uid = source->cr_uid; |
1096 | target->cr_gid = source->cr_gid; | |
1097 | target->cr_group_info = source->cr_group_info; | |
1098 | get_group_info(target->cr_group_info); | |
1099 | } | |
1100 | ||
35bba9a3 | 1101 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1102 | { |
a55370a3 | 1103 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | static int | |
599e0a22 BF |
1107 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1108 | { | |
1109 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1110 | } |
1111 | ||
1112 | static int | |
599e0a22 BF |
1113 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1114 | { | |
1115 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | /* XXX what about NGROUP */ | |
1119 | static int | |
599e0a22 BF |
1120 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1121 | { | |
1122 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1123 | } |
1124 | ||
5ec7b46c BF |
1125 | static void gen_clid(struct nfs4_client *clp) |
1126 | { | |
1127 | static u32 current_clientid = 1; | |
1128 | ||
1da177e4 LT |
1129 | clp->cl_clientid.cl_boot = boot_time; |
1130 | clp->cl_clientid.cl_id = current_clientid++; | |
1131 | } | |
1132 | ||
deda2faa BF |
1133 | static void gen_confirm(struct nfs4_client *clp) |
1134 | { | |
1135 | static u32 i; | |
1136 | u32 *p; | |
1da177e4 | 1137 | |
1da177e4 | 1138 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1139 | *p++ = get_seconds(); |
1140 | *p++ = i++; | |
1da177e4 LT |
1141 | } |
1142 | ||
38c2f4b1 | 1143 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1144 | { |
38c2f4b1 | 1145 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1146 | } |
1147 | ||
38c2f4b1 | 1148 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1149 | { |
1150 | struct nfs4_stid *s; | |
4d71ab87 | 1151 | |
38c2f4b1 | 1152 | s = find_stateid(cl, t); |
4d71ab87 BF |
1153 | if (!s) |
1154 | return NULL; | |
f459e453 | 1155 | if (typemask & s->sc_type) |
4581d140 | 1156 | return s; |
4581d140 BF |
1157 | return NULL; |
1158 | } | |
1159 | ||
b09333c4 RL |
1160 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1161 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1162 | { | |
1163 | struct nfs4_client *clp; | |
1164 | struct sockaddr *sa = svc_addr(rqstp); | |
1165 | char *princ; | |
1166 | ||
1167 | clp = alloc_client(name); | |
1168 | if (clp == NULL) | |
1169 | return NULL; | |
1170 | ||
792c95dd BF |
1171 | INIT_LIST_HEAD(&clp->cl_sessions); |
1172 | ||
b09333c4 RL |
1173 | princ = svc_gss_principal(rqstp); |
1174 | if (princ) { | |
1175 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1176 | if (clp->cl_principal == NULL) { | |
1177 | free_client(clp); | |
1178 | return NULL; | |
1179 | } | |
1180 | } | |
1181 | ||
38c2f4b1 | 1182 | idr_init(&clp->cl_stateids); |
b09333c4 | 1183 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1184 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1185 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1186 | INIT_LIST_HEAD(&clp->cl_idhash); |
1187 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1188 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1189 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1190 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1191 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1192 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1193 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1194 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1195 | clear_bit(0, &clp->cl_cb_slot_busy); |
1196 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1197 | copy_verf(clp, verf); | |
1198 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1199 | clp->cl_flavor = rqstp->rq_flavor; | |
1200 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1201 | gen_confirm(clp); | |
edd76786 | 1202 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1203 | return clp; |
1204 | } | |
1205 | ||
fd39ca9a | 1206 | static void |
1da177e4 LT |
1207 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1208 | { | |
1209 | unsigned int idhashval; | |
1210 | ||
1211 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1212 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1213 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1214 | renew_client(clp); |
1da177e4 LT |
1215 | } |
1216 | ||
fd39ca9a | 1217 | static void |
1da177e4 LT |
1218 | move_to_confirmed(struct nfs4_client *clp) |
1219 | { | |
1220 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1221 | unsigned int strhashval; | |
1222 | ||
1223 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1224 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1225 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1226 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1227 | renew_client(clp); |
1228 | } | |
1229 | ||
1230 | static struct nfs4_client * | |
1231 | find_confirmed_client(clientid_t *clid) | |
1232 | { | |
1233 | struct nfs4_client *clp; | |
1234 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1235 | ||
1236 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1237 | if (same_clid(&clp->cl_clientid, clid)) { |
1238 | renew_client(clp); | |
1da177e4 | 1239 | return clp; |
a50d2ad1 | 1240 | } |
1da177e4 LT |
1241 | } |
1242 | return NULL; | |
1243 | } | |
1244 | ||
1245 | static struct nfs4_client * | |
1246 | find_unconfirmed_client(clientid_t *clid) | |
1247 | { | |
1248 | struct nfs4_client *clp; | |
1249 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1250 | ||
1251 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1252 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1253 | return clp; |
1254 | } | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
6e5f15c9 | 1258 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1259 | { |
6e5f15c9 | 1260 | return clp->cl_exchange_flags != 0; |
e203d506 | 1261 | } |
a1bcecd2 | 1262 | |
28ce6054 | 1263 | static struct nfs4_client * |
e203d506 | 1264 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1265 | { |
1266 | struct nfs4_client *clp; | |
1267 | ||
1268 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1269 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1270 | return clp; |
1271 | } | |
1272 | return NULL; | |
1273 | } | |
1274 | ||
1275 | static struct nfs4_client * | |
e203d506 | 1276 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1277 | { |
1278 | struct nfs4_client *clp; | |
1279 | ||
1280 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1281 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1282 | return clp; |
1283 | } | |
1284 | return NULL; | |
1285 | } | |
1286 | ||
fd39ca9a | 1287 | static void |
6f3d772f | 1288 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1289 | { |
07263f1e | 1290 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1291 | struct sockaddr *sa = svc_addr(rqstp); |
1292 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1293 | unsigned short expected_family; |
1294 | ||
1295 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1296 | if (se->se_callback_netid_len == 3 && | |
1297 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1298 | expected_family = AF_INET; | |
1299 | else if (se->se_callback_netid_len == 4 && | |
1300 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1301 | expected_family = AF_INET6; | |
1302 | else | |
1da177e4 LT |
1303 | goto out_err; |
1304 | ||
07263f1e | 1305 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1306 | se->se_callback_addr_len, |
07263f1e BF |
1307 | (struct sockaddr *)&conn->cb_addr, |
1308 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1309 | |
07263f1e | 1310 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1311 | goto out_err; |
aa9a4ec7 | 1312 | |
07263f1e BF |
1313 | if (conn->cb_addr.ss_family == AF_INET6) |
1314 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1315 | |
07263f1e BF |
1316 | conn->cb_prog = se->se_callback_prog; |
1317 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1318 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1319 | return; |
1320 | out_err: | |
07263f1e BF |
1321 | conn->cb_addr.ss_family = AF_UNSPEC; |
1322 | conn->cb_addrlen = 0; | |
849823c5 | 1323 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1324 | "will not receive delegations\n", |
1325 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1326 | ||
1da177e4 LT |
1327 | return; |
1328 | } | |
1329 | ||
074fe897 | 1330 | /* |
557ce264 | 1331 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1332 | */ |
074fe897 AA |
1333 | void |
1334 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1335 | { |
557ce264 AA |
1336 | struct nfsd4_slot *slot = resp->cstate.slot; |
1337 | unsigned int base; | |
074fe897 | 1338 | |
557ce264 | 1339 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1340 | |
557ce264 AA |
1341 | slot->sl_opcnt = resp->opcnt; |
1342 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1343 | |
bf864a31 | 1344 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1345 | slot->sl_datalen = 0; |
bf864a31 | 1346 | return; |
074fe897 | 1347 | } |
557ce264 AA |
1348 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1349 | base = (char *)resp->cstate.datap - | |
1350 | (char *)resp->xbuf->head[0].iov_base; | |
1351 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1352 | slot->sl_datalen)) | |
1353 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1354 | return; | |
074fe897 AA |
1355 | } |
1356 | ||
1357 | /* | |
abfabf8c AA |
1358 | * Encode the replay sequence operation from the slot values. |
1359 | * If cachethis is FALSE encode the uncached rep error on the next | |
1360 | * operation which sets resp->p and increments resp->opcnt for | |
1361 | * nfs4svc_encode_compoundres. | |
074fe897 | 1362 | * |
074fe897 | 1363 | */ |
abfabf8c AA |
1364 | static __be32 |
1365 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1366 | struct nfsd4_compoundres *resp) | |
074fe897 | 1367 | { |
abfabf8c AA |
1368 | struct nfsd4_op *op; |
1369 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1370 | |
abfabf8c | 1371 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1372 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1373 | |
abfabf8c AA |
1374 | /* Encode the replayed sequence operation */ |
1375 | op = &args->ops[resp->opcnt - 1]; | |
1376 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1377 | |
abfabf8c | 1378 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1379 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1380 | op = &args->ops[resp->opcnt++]; |
1381 | op->status = nfserr_retry_uncached_rep; | |
1382 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1383 | } |
abfabf8c | 1384 | return op->status; |
074fe897 AA |
1385 | } |
1386 | ||
1387 | /* | |
557ce264 AA |
1388 | * The sequence operation is not cached because we can use the slot and |
1389 | * session values. | |
074fe897 AA |
1390 | */ |
1391 | __be32 | |
bf864a31 AA |
1392 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1393 | struct nfsd4_sequence *seq) | |
074fe897 | 1394 | { |
557ce264 | 1395 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1396 | __be32 status; |
1397 | ||
557ce264 | 1398 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1399 | |
abfabf8c AA |
1400 | /* Either returns 0 or nfserr_retry_uncached */ |
1401 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1402 | if (status == nfserr_retry_uncached_rep) | |
1403 | return status; | |
074fe897 | 1404 | |
557ce264 AA |
1405 | /* The sequence operation has been encoded, cstate->datap set. */ |
1406 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1407 | |
557ce264 AA |
1408 | resp->opcnt = slot->sl_opcnt; |
1409 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1410 | status = slot->sl_status; | |
074fe897 AA |
1411 | |
1412 | return status; | |
1413 | } | |
1414 | ||
0733d213 AA |
1415 | /* |
1416 | * Set the exchange_id flags returned by the server. | |
1417 | */ | |
1418 | static void | |
1419 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1420 | { | |
1421 | /* pNFS is not supported */ | |
1422 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1423 | ||
1424 | /* Referrals are supported, Migration is not. */ | |
1425 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1426 | ||
1427 | /* set the wire flags to return to client. */ | |
1428 | clid->flags = new->cl_exchange_flags; | |
1429 | } | |
1430 | ||
069b6ad4 AA |
1431 | __be32 |
1432 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1433 | struct nfsd4_compound_state *cstate, | |
1434 | struct nfsd4_exchange_id *exid) | |
1435 | { | |
0733d213 AA |
1436 | struct nfs4_client *unconf, *conf, *new; |
1437 | int status; | |
1438 | unsigned int strhashval; | |
1439 | char dname[HEXDIR_LEN]; | |
363168b4 | 1440 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1441 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1442 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1443 | |
363168b4 | 1444 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1445 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1446 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1447 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1448 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1449 | |
a084daf5 | 1450 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1451 | return nfserr_inval; |
1452 | ||
1453 | /* Currently only support SP4_NONE */ | |
1454 | switch (exid->spa_how) { | |
1455 | case SP4_NONE: | |
1456 | break; | |
1457 | case SP4_SSV: | |
044bc1d4 | 1458 | return nfserr_serverfault; |
0733d213 AA |
1459 | default: |
1460 | BUG(); /* checked by xdr code */ | |
1461 | case SP4_MACH_CRED: | |
1462 | return nfserr_serverfault; /* no excuse :-/ */ | |
1463 | } | |
1464 | ||
1465 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1466 | ||
1467 | if (status) | |
1468 | goto error; | |
1469 | ||
1470 | strhashval = clientstr_hashval(dname); | |
1471 | ||
1472 | nfs4_lock_state(); | |
1473 | status = nfs_ok; | |
1474 | ||
e203d506 | 1475 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1476 | if (conf) { |
e203d506 BF |
1477 | if (!clp_used_exchangeid(conf)) { |
1478 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1479 | goto out; | |
1480 | } | |
0733d213 AA |
1481 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1482 | /* 18.35.4 case 8 */ | |
1483 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1484 | status = nfserr_not_same; | |
1485 | goto out; | |
1486 | } | |
1487 | /* Client reboot: destroy old state */ | |
1488 | expire_client(conf); | |
1489 | goto out_new; | |
1490 | } | |
1491 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1492 | /* 18.35.4 case 9 */ | |
1493 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1494 | status = nfserr_perm; | |
1495 | goto out; | |
1496 | } | |
1497 | expire_client(conf); | |
1498 | goto out_new; | |
1499 | } | |
0733d213 AA |
1500 | /* |
1501 | * Set bit when the owner id and verifier map to an already | |
1502 | * confirmed client id (18.35.3). | |
1503 | */ | |
1504 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1505 | ||
1506 | /* | |
1507 | * Falling into 18.35.4 case 2, possible router replay. | |
1508 | * Leave confirmed record intact and return same result. | |
1509 | */ | |
1510 | copy_verf(conf, &verf); | |
1511 | new = conf; | |
1512 | goto out_copy; | |
6ddbbbfe MS |
1513 | } |
1514 | ||
1515 | /* 18.35.4 case 7 */ | |
1516 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1517 | status = nfserr_noent; | |
1518 | goto out; | |
0733d213 AA |
1519 | } |
1520 | ||
e203d506 | 1521 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1522 | if (unconf) { |
1523 | /* | |
1524 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1525 | * a new unconfirmed record should be generated regardless | |
1526 | * of whether any properties have changed. | |
1527 | */ | |
1528 | expire_client(unconf); | |
1529 | } | |
1530 | ||
1531 | out_new: | |
1532 | /* Normal case */ | |
b09333c4 | 1533 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1534 | if (new == NULL) { |
4731030d | 1535 | status = nfserr_jukebox; |
0733d213 AA |
1536 | goto out; |
1537 | } | |
1538 | ||
0733d213 | 1539 | gen_clid(new); |
0733d213 AA |
1540 | add_to_unconfirmed(new, strhashval); |
1541 | out_copy: | |
1542 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1543 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1544 | ||
38eb76a5 | 1545 | exid->seqid = 1; |
0733d213 AA |
1546 | nfsd4_set_ex_flags(new, exid); |
1547 | ||
1548 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1549 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1550 | status = nfs_ok; |
1551 | ||
1552 | out: | |
1553 | nfs4_unlock_state(); | |
1554 | error: | |
1555 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1556 | return status; | |
069b6ad4 AA |
1557 | } |
1558 | ||
b85d4c01 | 1559 | static int |
88e588d5 | 1560 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1561 | { |
88e588d5 AA |
1562 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1563 | slot_seqid); | |
b85d4c01 BH |
1564 | |
1565 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1566 | if (slot_inuse) { |
1567 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1568 | return nfserr_jukebox; |
1569 | else | |
1570 | return nfserr_seq_misordered; | |
1571 | } | |
1572 | /* Normal */ | |
88e588d5 | 1573 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1574 | return nfs_ok; |
1575 | /* Replay */ | |
88e588d5 | 1576 | if (seqid == slot_seqid) |
b85d4c01 BH |
1577 | return nfserr_replay_cache; |
1578 | /* Wraparound */ | |
88e588d5 | 1579 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1580 | return nfs_ok; |
1581 | /* Misordered replay or misordered new request */ | |
1582 | return nfserr_seq_misordered; | |
1583 | } | |
1584 | ||
49557cc7 AA |
1585 | /* |
1586 | * Cache the create session result into the create session single DRC | |
1587 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1588 | * Do this for solo or embedded create session operations. | |
1589 | */ | |
1590 | static void | |
1591 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1592 | struct nfsd4_clid_slot *slot, int nfserr) | |
1593 | { | |
1594 | slot->sl_status = nfserr; | |
1595 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1596 | } | |
1597 | ||
1598 | static __be32 | |
1599 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1600 | struct nfsd4_clid_slot *slot) | |
1601 | { | |
1602 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1603 | return slot->sl_status; | |
1604 | } | |
1605 | ||
1b74c25b MJ |
1606 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1607 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1608 | 1 + /* MIN tag is length with zero, only length */ \ | |
1609 | 3 + /* version, opcount, opcode */ \ | |
1610 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1611 | /* seqid, slotID, slotID, cache */ \ | |
1612 | 4 ) * sizeof(__be32)) | |
1613 | ||
1614 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1615 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1616 | 1 + /* status */ \ | |
1617 | 1 + /* MIN tag is length with zero, only length */ \ | |
1618 | 3 + /* opcount, opcode, opstatus*/ \ | |
1619 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1620 | /* seqid, slotID, slotID, slotID, status */ \ | |
1621 | 5 ) * sizeof(__be32)) | |
1622 | ||
1623 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1624 | { | |
1625 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1626 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1627 | } | |
1628 | ||
069b6ad4 AA |
1629 | __be32 |
1630 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1631 | struct nfsd4_compound_state *cstate, | |
1632 | struct nfsd4_create_session *cr_ses) | |
1633 | { | |
363168b4 | 1634 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1635 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1636 | struct nfsd4_session *new; |
49557cc7 | 1637 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1638 | bool confirm_me = false; |
ec6b5d7b AA |
1639 | int status = 0; |
1640 | ||
a62573dc MJ |
1641 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1642 | return nfserr_inval; | |
1643 | ||
ec6b5d7b AA |
1644 | nfs4_lock_state(); |
1645 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1646 | conf = find_confirmed_client(&cr_ses->clientid); | |
1647 | ||
1648 | if (conf) { | |
49557cc7 AA |
1649 | cs_slot = &conf->cl_cs_slot; |
1650 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1651 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1652 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1653 | cs_slot->sl_seqid); |
38eb76a5 | 1654 | /* Return the cached reply status */ |
49557cc7 | 1655 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1656 | goto out; |
49557cc7 | 1657 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1658 | status = nfserr_seq_misordered; |
1659 | dprintk("Sequence misordered!\n"); | |
1660 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1661 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1662 | goto out; |
1663 | } | |
ec6b5d7b AA |
1664 | } else if (unconf) { |
1665 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1666 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1667 | status = nfserr_clid_inuse; |
1668 | goto out; | |
1669 | } | |
1670 | ||
49557cc7 AA |
1671 | cs_slot = &unconf->cl_cs_slot; |
1672 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1673 | if (status) { |
1674 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1675 | status = nfserr_seq_misordered; |
cd5b8144 | 1676 | goto out; |
ec6b5d7b AA |
1677 | } |
1678 | ||
86c3e16c | 1679 | confirm_me = true; |
ec6b5d7b AA |
1680 | conf = unconf; |
1681 | } else { | |
1682 | status = nfserr_stale_clientid; | |
1683 | goto out; | |
1684 | } | |
1685 | ||
8323c3b2 BF |
1686 | /* |
1687 | * XXX: we should probably set this at creation time, and check | |
1688 | * for consistent minorversion use throughout: | |
1689 | */ | |
1690 | conf->cl_minorversion = 1; | |
408b79bc BF |
1691 | /* |
1692 | * We do not support RDMA or persistent sessions | |
1693 | */ | |
1694 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1695 | cr_ses->flags &= ~SESSION4_RDMA; | |
1696 | ||
1b74c25b MJ |
1697 | status = nfserr_toosmall; |
1698 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1699 | goto out; | |
1700 | ||
ac7c46f2 BF |
1701 | status = nfserr_jukebox; |
1702 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1703 | if (!new) | |
ec6b5d7b | 1704 | goto out; |
ac7c46f2 BF |
1705 | status = nfs_ok; |
1706 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1707 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1708 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1709 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1710 | cs_slot->sl_seqid++; |
49557cc7 | 1711 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1712 | |
49557cc7 AA |
1713 | /* cache solo and embedded create sessions under the state lock */ |
1714 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1715 | if (confirm_me) |
1716 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1717 | out: |
1718 | nfs4_unlock_state(); | |
1719 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1720 | return status; | |
069b6ad4 AA |
1721 | } |
1722 | ||
57716355 BF |
1723 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1724 | { | |
1725 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1726 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1727 | ||
1728 | return argp->opcnt == resp->opcnt; | |
1729 | } | |
1730 | ||
1d1bc8f2 BF |
1731 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1732 | { | |
1733 | switch (*dir) { | |
1734 | case NFS4_CDFC4_FORE: | |
1735 | case NFS4_CDFC4_BACK: | |
1736 | return nfs_ok; | |
1737 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1738 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1739 | *dir = NFS4_CDFC4_BOTH; | |
1740 | return nfs_ok; | |
1741 | }; | |
1742 | return nfserr_inval; | |
1743 | } | |
1744 | ||
1745 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1746 | struct nfsd4_compound_state *cstate, | |
1747 | struct nfsd4_bind_conn_to_session *bcts) | |
1748 | { | |
1749 | __be32 status; | |
1750 | ||
1751 | if (!nfsd4_last_compound_op(rqstp)) | |
1752 | return nfserr_not_only_op; | |
1753 | spin_lock(&client_lock); | |
1754 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1755 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1756 | * client_lock iself: */ | |
1757 | if (cstate->session) { | |
1758 | nfsd4_get_session(cstate->session); | |
1759 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1760 | } | |
1761 | spin_unlock(&client_lock); | |
1762 | if (!cstate->session) | |
1763 | return nfserr_badsession; | |
1764 | ||
1765 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1766 | if (!status) |
1767 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1768 | return status; | |
1d1bc8f2 BF |
1769 | } |
1770 | ||
5d4cec2f BF |
1771 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1772 | { | |
1773 | if (!session) | |
1774 | return 0; | |
1775 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1776 | } | |
1777 | ||
069b6ad4 AA |
1778 | __be32 |
1779 | nfsd4_destroy_session(struct svc_rqst *r, | |
1780 | struct nfsd4_compound_state *cstate, | |
1781 | struct nfsd4_destroy_session *sessionid) | |
1782 | { | |
e10e0cfc BH |
1783 | struct nfsd4_session *ses; |
1784 | u32 status = nfserr_badsession; | |
1785 | ||
1786 | /* Notes: | |
1787 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1788 | * - Should we return nfserr_back_chan_busy if waiting for | |
1789 | * callbacks on to-be-destroyed session? | |
1790 | * - Do we need to clear any callback info from previous session? | |
1791 | */ | |
1792 | ||
5d4cec2f | 1793 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1794 | if (!nfsd4_last_compound_op(r)) |
1795 | return nfserr_not_only_op; | |
1796 | } | |
e10e0cfc | 1797 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1798 | spin_lock(&client_lock); |
e10e0cfc BH |
1799 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1800 | if (!ses) { | |
9089f1b4 | 1801 | spin_unlock(&client_lock); |
e10e0cfc BH |
1802 | goto out; |
1803 | } | |
1804 | ||
1805 | unhash_session(ses); | |
9089f1b4 | 1806 | spin_unlock(&client_lock); |
e10e0cfc | 1807 | |
ab707e15 | 1808 | nfs4_lock_state(); |
84f5f7cc | 1809 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1810 | nfs4_unlock_state(); |
19cf5c02 BF |
1811 | |
1812 | nfsd4_del_conns(ses); | |
1813 | ||
e10e0cfc BH |
1814 | nfsd4_put_session(ses); |
1815 | status = nfs_ok; | |
1816 | out: | |
1817 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1818 | return status; | |
069b6ad4 AA |
1819 | } |
1820 | ||
a663bdd8 | 1821 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1822 | { |
1823 | struct nfsd4_conn *c; | |
1824 | ||
1825 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1826 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1827 | return c; |
1828 | } | |
1829 | } | |
1830 | return NULL; | |
1831 | } | |
1832 | ||
a663bdd8 | 1833 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1834 | { |
1835 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1836 | struct nfsd4_conn *c; |
21b75b01 | 1837 | int ret; |
328ead28 BF |
1838 | |
1839 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1840 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1841 | if (c) { |
1842 | spin_unlock(&clp->cl_lock); | |
1843 | free_conn(new); | |
1844 | return; | |
1845 | } | |
1846 | __nfsd4_hash_conn(new, ses); | |
1847 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1848 | ret = nfsd4_register_conn(new); |
1849 | if (ret) | |
1850 | /* oops; xprt is already down: */ | |
1851 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1852 | return; |
1853 | } | |
1854 | ||
868b89c3 MJ |
1855 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1856 | { | |
1857 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1858 | ||
1859 | return args->opcnt > session->se_fchannel.maxops; | |
1860 | } | |
1861 | ||
ae82a8d0 MJ |
1862 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1863 | struct nfsd4_session *session) | |
1864 | { | |
1865 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1866 | ||
1867 | return xb->len > session->se_fchannel.maxreq_sz; | |
1868 | } | |
1869 | ||
069b6ad4 | 1870 | __be32 |
b85d4c01 | 1871 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1872 | struct nfsd4_compound_state *cstate, |
1873 | struct nfsd4_sequence *seq) | |
1874 | { | |
f9bb94c4 | 1875 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1876 | struct nfsd4_session *session; |
1877 | struct nfsd4_slot *slot; | |
a663bdd8 | 1878 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1879 | int status; |
1880 | ||
f9bb94c4 AA |
1881 | if (resp->opcnt != 1) |
1882 | return nfserr_sequence_pos; | |
1883 | ||
a663bdd8 BF |
1884 | /* |
1885 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1886 | * below. | |
1887 | */ | |
1888 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1889 | if (!conn) | |
1890 | return nfserr_jukebox; | |
1891 | ||
9089f1b4 | 1892 | spin_lock(&client_lock); |
b85d4c01 BH |
1893 | status = nfserr_badsession; |
1894 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1895 | if (!session) | |
1896 | goto out; | |
1897 | ||
868b89c3 MJ |
1898 | status = nfserr_too_many_ops; |
1899 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1900 | goto out; | |
1901 | ||
ae82a8d0 MJ |
1902 | status = nfserr_req_too_big; |
1903 | if (nfsd4_request_too_big(rqstp, session)) | |
1904 | goto out; | |
1905 | ||
b85d4c01 | 1906 | status = nfserr_badslot; |
6c18ba9f | 1907 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1908 | goto out; |
1909 | ||
557ce264 | 1910 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1911 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1912 | ||
a8dfdaeb AA |
1913 | /* We do not negotiate the number of slots yet, so set the |
1914 | * maxslots to the session maxreqs which is used to encode | |
1915 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1916 | seq->maxslots = session->se_fchannel.maxreqs; | |
1917 | ||
88e588d5 | 1918 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1919 | if (status == nfserr_replay_cache) { |
1920 | cstate->slot = slot; | |
1921 | cstate->session = session; | |
da3846a2 | 1922 | /* Return the cached reply status and set cstate->status |
557ce264 | 1923 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1924 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1925 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1926 | goto out; |
b85d4c01 BH |
1927 | } |
1928 | if (status) | |
1929 | goto out; | |
1930 | ||
a663bdd8 BF |
1931 | nfsd4_sequence_check_conn(conn, session); |
1932 | conn = NULL; | |
328ead28 | 1933 | |
b85d4c01 BH |
1934 | /* Success! bump slot seqid */ |
1935 | slot->sl_inuse = true; | |
1936 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1937 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1938 | |
1939 | cstate->slot = slot; | |
1940 | cstate->session = session; | |
1941 | ||
b85d4c01 | 1942 | out: |
26c0c75e | 1943 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1944 | if (cstate->session) { |
0d7bb719 BF |
1945 | struct nfs4_client *clp = session->se_client; |
1946 | ||
36acb66b | 1947 | nfsd4_get_session(cstate->session); |
0d7bb719 | 1948 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
1949 | switch (clp->cl_cb_state) { |
1950 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 1951 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
1952 | break; |
1953 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 1954 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 1955 | break; |
fc0c3dd1 BH |
1956 | default: |
1957 | seq->status_flags = 0; | |
5423732a | 1958 | } |
aaf84eb9 | 1959 | } |
a663bdd8 | 1960 | kfree(conn); |
36acb66b | 1961 | spin_unlock(&client_lock); |
b85d4c01 BH |
1962 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1963 | return status; | |
069b6ad4 AA |
1964 | } |
1965 | ||
345c2842 MJ |
1966 | static inline bool has_resources(struct nfs4_client *clp) |
1967 | { | |
1968 | return !list_empty(&clp->cl_openowners) | |
1969 | || !list_empty(&clp->cl_delegations) | |
1970 | || !list_empty(&clp->cl_sessions); | |
1971 | } | |
1972 | ||
1973 | __be32 | |
1974 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
1975 | { | |
1976 | struct nfs4_client *conf, *unconf, *clp; | |
1977 | int status = 0; | |
1978 | ||
1979 | nfs4_lock_state(); | |
1980 | unconf = find_unconfirmed_client(&dc->clientid); | |
1981 | conf = find_confirmed_client(&dc->clientid); | |
1982 | ||
1983 | if (conf) { | |
1984 | clp = conf; | |
1985 | ||
1986 | if (!is_client_expired(conf) && has_resources(conf)) { | |
1987 | status = nfserr_clientid_busy; | |
1988 | goto out; | |
1989 | } | |
1990 | ||
1991 | /* rfc5661 18.50.3 */ | |
1992 | if (cstate->session && conf == cstate->session->se_client) { | |
1993 | status = nfserr_clientid_busy; | |
1994 | goto out; | |
1995 | } | |
1996 | } else if (unconf) | |
1997 | clp = unconf; | |
1998 | else { | |
1999 | status = nfserr_stale_clientid; | |
2000 | goto out; | |
2001 | } | |
2002 | ||
2003 | expire_client(clp); | |
2004 | out: | |
2005 | nfs4_unlock_state(); | |
2006 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2007 | return status; | |
2008 | } | |
2009 | ||
4dc6ec00 BF |
2010 | __be32 |
2011 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2012 | { | |
bcecf1cc MJ |
2013 | int status = 0; |
2014 | ||
4dc6ec00 BF |
2015 | if (rc->rca_one_fs) { |
2016 | if (!cstate->current_fh.fh_dentry) | |
2017 | return nfserr_nofilehandle; | |
2018 | /* | |
2019 | * We don't take advantage of the rca_one_fs case. | |
2020 | * That's OK, it's optional, we can safely ignore it. | |
2021 | */ | |
2022 | return nfs_ok; | |
2023 | } | |
bcecf1cc | 2024 | |
4dc6ec00 | 2025 | nfs4_lock_state(); |
bcecf1cc MJ |
2026 | status = nfserr_complete_already; |
2027 | if (cstate->session->se_client->cl_firststate) | |
2028 | goto out; | |
2029 | ||
2030 | status = nfserr_stale_clientid; | |
2031 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2032 | /* |
2033 | * The following error isn't really legal. | |
2034 | * But we only get here if the client just explicitly | |
2035 | * destroyed the client. Surely it no longer cares what | |
2036 | * error it gets back on an operation for the dead | |
2037 | * client. | |
2038 | */ | |
bcecf1cc MJ |
2039 | goto out; |
2040 | ||
2041 | status = nfs_ok; | |
4dc6ec00 | 2042 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 2043 | out: |
4dc6ec00 | 2044 | nfs4_unlock_state(); |
bcecf1cc | 2045 | return status; |
4dc6ec00 BF |
2046 | } |
2047 | ||
b37ad28b | 2048 | __be32 |
b591480b BF |
2049 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2050 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2051 | { |
a084daf5 | 2052 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2053 | nfs4_verifier clverifier = setclid->se_verf; |
2054 | unsigned int strhashval; | |
28ce6054 | 2055 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2056 | __be32 status; |
a55370a3 | 2057 | char dname[HEXDIR_LEN]; |
1da177e4 | 2058 | |
a55370a3 N |
2059 | status = nfs4_make_rec_clidname(dname, &clname); |
2060 | if (status) | |
73aea4ec | 2061 | return status; |
a55370a3 | 2062 | |
1da177e4 LT |
2063 | /* |
2064 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2065 | * We get here on a DRC miss. | |
2066 | */ | |
2067 | ||
a55370a3 | 2068 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2069 | |
1da177e4 | 2070 | nfs4_lock_state(); |
e203d506 | 2071 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2072 | if (conf) { |
a186e767 | 2073 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2074 | status = nfserr_clid_inuse; |
e203d506 BF |
2075 | if (clp_used_exchangeid(conf)) |
2076 | goto out; | |
026722c2 | 2077 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2078 | char addr_str[INET6_ADDRSTRLEN]; |
2079 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2080 | sizeof(addr_str)); | |
2081 | dprintk("NFSD: setclientid: string in use by client " | |
2082 | "at %s\n", addr_str); | |
1da177e4 LT |
2083 | goto out; |
2084 | } | |
1da177e4 | 2085 | } |
a186e767 BF |
2086 | /* |
2087 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2088 | * has a description of SETCLIENTID request processing consisting | |
2089 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2090 | */ | |
e203d506 | 2091 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2092 | status = nfserr_jukebox; |
1da177e4 | 2093 | if (!conf) { |
a186e767 BF |
2094 | /* |
2095 | * RFC 3530 14.2.33 CASE 4: | |
2096 | * placed first, because it is the normal case | |
1da177e4 LT |
2097 | */ |
2098 | if (unconf) | |
2099 | expire_client(unconf); | |
b09333c4 | 2100 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2101 | if (new == NULL) |
1da177e4 | 2102 | goto out; |
1da177e4 | 2103 | gen_clid(new); |
599e0a22 | 2104 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2105 | /* |
a186e767 BF |
2106 | * RFC 3530 14.2.33 CASE 1: |
2107 | * probable callback update | |
1da177e4 | 2108 | */ |
31f4a6c1 N |
2109 | if (unconf) { |
2110 | /* Note this is removing unconfirmed {*x***}, | |
2111 | * which is stronger than RFC recommended {vxc**}. | |
2112 | * This has the advantage that there is at most | |
2113 | * one {*x***} in either list at any time. | |
2114 | */ | |
2115 | expire_client(unconf); | |
1da177e4 | 2116 | } |
b09333c4 | 2117 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2118 | if (new == NULL) |
1da177e4 | 2119 | goto out; |
1da177e4 | 2120 | copy_clid(new, conf); |
1da177e4 LT |
2121 | } else if (!unconf) { |
2122 | /* | |
a186e767 BF |
2123 | * RFC 3530 14.2.33 CASE 2: |
2124 | * probable client reboot; state will be removed if | |
2125 | * confirmed. | |
1da177e4 | 2126 | */ |
b09333c4 | 2127 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2128 | if (new == NULL) |
1da177e4 | 2129 | goto out; |
1da177e4 | 2130 | gen_clid(new); |
49ba8781 | 2131 | } else { |
a186e767 BF |
2132 | /* |
2133 | * RFC 3530 14.2.33 CASE 3: | |
2134 | * probable client reboot; state will be removed if | |
2135 | * confirmed. | |
1da177e4 LT |
2136 | */ |
2137 | expire_client(unconf); | |
b09333c4 | 2138 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2139 | if (new == NULL) |
1da177e4 | 2140 | goto out; |
1da177e4 | 2141 | gen_clid(new); |
1da177e4 | 2142 | } |
8323c3b2 BF |
2143 | /* |
2144 | * XXX: we should probably set this at creation time, and check | |
2145 | * for consistent minorversion use throughout: | |
2146 | */ | |
2147 | new->cl_minorversion = 0; | |
6f3d772f | 2148 | gen_callback(new, setclid, rqstp); |
c175b83c | 2149 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2150 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2151 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2152 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2153 | status = nfs_ok; | |
2154 | out: | |
2155 | nfs4_unlock_state(); | |
2156 | return status; | |
2157 | } | |
2158 | ||
2159 | ||
2160 | /* | |
a186e767 BF |
2161 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2162 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2163 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2164 | */ |
b37ad28b | 2165 | __be32 |
b591480b BF |
2166 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2167 | struct nfsd4_compound_state *cstate, | |
2168 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2169 | { |
363168b4 | 2170 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2171 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2172 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2173 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2174 | __be32 status; |
1da177e4 LT |
2175 | |
2176 | if (STALE_CLIENTID(clid)) | |
2177 | return nfserr_stale_clientid; | |
2178 | /* | |
2179 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2180 | * We get here on a DRC miss. | |
2181 | */ | |
2182 | ||
2183 | nfs4_lock_state(); | |
21ab45a4 N |
2184 | |
2185 | conf = find_confirmed_client(clid); | |
2186 | unconf = find_unconfirmed_client(clid); | |
2187 | ||
2188 | status = nfserr_clid_inuse; | |
363168b4 | 2189 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2190 | goto out; |
363168b4 | 2191 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2192 | goto out; |
2193 | ||
a186e767 BF |
2194 | /* |
2195 | * section 14.2.34 of RFC 3530 has a description of | |
2196 | * SETCLIENTID_CONFIRM request processing consisting | |
2197 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2198 | */ | |
366e0c1d | 2199 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2200 | /* |
2201 | * RFC 3530 14.2.34 CASE 1: | |
2202 | * callback update | |
2203 | */ | |
599e0a22 | 2204 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2205 | status = nfserr_clid_inuse; |
2206 | else { | |
5a3c9d71 BF |
2207 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2208 | nfsd4_probe_callback(conf); | |
1a69c179 | 2209 | expire_client(unconf); |
1da177e4 | 2210 | status = nfs_ok; |
1a69c179 | 2211 | |
1da177e4 | 2212 | } |
f3aba4e5 | 2213 | } else if (conf && !unconf) { |
a186e767 BF |
2214 | /* |
2215 | * RFC 3530 14.2.34 CASE 2: | |
2216 | * probable retransmitted request; play it safe and | |
2217 | * do nothing. | |
7c79f737 | 2218 | */ |
599e0a22 | 2219 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2220 | status = nfserr_clid_inuse; |
21ab45a4 | 2221 | else |
1da177e4 | 2222 | status = nfs_ok; |
7c79f737 | 2223 | } else if (!conf && unconf |
599e0a22 | 2224 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2225 | /* |
2226 | * RFC 3530 14.2.34 CASE 3: | |
2227 | * Normal case; new or rebooted client: | |
7c79f737 | 2228 | */ |
599e0a22 | 2229 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2230 | status = nfserr_clid_inuse; |
2231 | } else { | |
1a69c179 N |
2232 | unsigned int hash = |
2233 | clientstr_hashval(unconf->cl_recdir); | |
2234 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2235 | hash); |
1a69c179 | 2236 | if (conf) { |
c7b9a459 | 2237 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2238 | expire_client(conf); |
2239 | } | |
1da177e4 | 2240 | move_to_confirmed(unconf); |
21ab45a4 | 2241 | conf = unconf; |
5a3c9d71 | 2242 | nfsd4_probe_callback(conf); |
1a69c179 | 2243 | status = nfs_ok; |
1da177e4 | 2244 | } |
599e0a22 BF |
2245 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2246 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2247 | &confirm)))) { |
a186e767 BF |
2248 | /* |
2249 | * RFC 3530 14.2.34 CASE 4: | |
2250 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2251 | */ |
1da177e4 | 2252 | status = nfserr_stale_clientid; |
7c79f737 | 2253 | } else { |
08e8987c N |
2254 | /* check that we have hit one of the cases...*/ |
2255 | status = nfserr_clid_inuse; | |
2256 | } | |
1da177e4 | 2257 | out: |
1da177e4 LT |
2258 | nfs4_unlock_state(); |
2259 | return status; | |
2260 | } | |
2261 | ||
32513b40 BF |
2262 | static struct nfs4_file *nfsd4_alloc_file(void) |
2263 | { | |
2264 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2265 | } | |
2266 | ||
1da177e4 | 2267 | /* OPEN Share state helper functions */ |
32513b40 | 2268 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2269 | { |
1da177e4 LT |
2270 | unsigned int hashval = file_hashval(ino); |
2271 | ||
32513b40 BF |
2272 | atomic_set(&fp->fi_ref, 1); |
2273 | INIT_LIST_HEAD(&fp->fi_hash); | |
2274 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2275 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2276 | fp->fi_inode = igrab(ino); | |
2277 | fp->fi_had_conflict = false; | |
2278 | fp->fi_lease = NULL; | |
2279 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2280 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2281 | spin_lock(&recall_lock); | |
2282 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2283 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2284 | } |
2285 | ||
e60d4398 | 2286 | static void |
e18b890b | 2287 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2288 | { |
e60d4398 N |
2289 | if (*slab == NULL) |
2290 | return; | |
1a1d92c1 | 2291 | kmem_cache_destroy(*slab); |
e60d4398 | 2292 | *slab = NULL; |
1da177e4 LT |
2293 | } |
2294 | ||
e8ff2a84 | 2295 | void |
1da177e4 LT |
2296 | nfsd4_free_slabs(void) |
2297 | { | |
fe0750e5 BF |
2298 | nfsd4_free_slab(&openowner_slab); |
2299 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2300 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2301 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2302 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2303 | } |
1da177e4 | 2304 | |
72083396 | 2305 | int |
e60d4398 N |
2306 | nfsd4_init_slabs(void) |
2307 | { | |
fe0750e5 BF |
2308 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2309 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2310 | if (openowner_slab == NULL) | |
2311 | goto out_nomem; | |
2312 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2313 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2314 | if (lockowner_slab == NULL) | |
e60d4398 N |
2315 | goto out_nomem; |
2316 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2317 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2318 | if (file_slab == NULL) |
2319 | goto out_nomem; | |
5ac049ac | 2320 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2321 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2322 | if (stateid_slab == NULL) |
2323 | goto out_nomem; | |
5b2d21c1 | 2324 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2325 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2326 | if (deleg_slab == NULL) |
2327 | goto out_nomem; | |
e60d4398 N |
2328 | return 0; |
2329 | out_nomem: | |
2330 | nfsd4_free_slabs(); | |
2331 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2332 | return -ENOMEM; | |
1da177e4 LT |
2333 | } |
2334 | ||
fe0750e5 BF |
2335 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2336 | { | |
2337 | kfree(oo->oo_owner.so_owner.data); | |
2338 | kmem_cache_free(openowner_slab, oo); | |
2339 | } | |
2340 | ||
2341 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2342 | { |
fe0750e5 BF |
2343 | kfree(lo->lo_owner.so_owner.data); |
2344 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2345 | } |
2346 | ||
ff194bd9 | 2347 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2348 | { |
ff194bd9 BF |
2349 | rp->rp_status = nfserr_serverfault; |
2350 | rp->rp_buflen = 0; | |
2351 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2352 | } |
2353 | ||
fe0750e5 | 2354 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2355 | { |
1da177e4 | 2356 | struct nfs4_stateowner *sop; |
1da177e4 | 2357 | |
fe0750e5 | 2358 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2359 | if (!sop) |
2360 | return NULL; | |
2361 | ||
2362 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2363 | if (!sop->so_owner.data) { | |
fe0750e5 | 2364 | kmem_cache_free(slab, sop); |
1da177e4 | 2365 | return NULL; |
ff194bd9 BF |
2366 | } |
2367 | sop->so_owner.len = owner->len; | |
2368 | ||
ea1da636 | 2369 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2370 | sop->so_client = clp; |
2371 | init_nfs4_replay(&sop->so_replay); | |
2372 | return sop; | |
2373 | } | |
2374 | ||
fe0750e5 | 2375 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2376 | { |
16bfdaaf | 2377 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2378 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2379 | } |
2380 | ||
fe0750e5 | 2381 | static struct nfs4_openowner * |
ff194bd9 | 2382 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2383 | struct nfs4_openowner *oo; |
ff194bd9 | 2384 | |
fe0750e5 BF |
2385 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2386 | if (!oo) | |
ff194bd9 | 2387 | return NULL; |
fe0750e5 BF |
2388 | oo->oo_owner.so_is_open_owner = 1; |
2389 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2390 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2391 | oo->oo_time = 0; |
38c387b5 | 2392 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2393 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2394 | hash_openowner(oo, clp, strhashval); | |
2395 | return oo; | |
1da177e4 LT |
2396 | } |
2397 | ||
996e0938 | 2398 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2399 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2400 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2401 | |
996e0938 | 2402 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2403 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2404 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2405 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2406 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2407 | get_nfs4_file(fp); |
1da177e4 | 2408 | stp->st_file = fp; |
1da177e4 LT |
2409 | stp->st_access_bmap = 0; |
2410 | stp->st_deny_bmap = 0; | |
b6d2f1ca | 2411 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1da177e4 | 2412 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2413 | stp->st_openstp = NULL; |
1da177e4 LT |
2414 | } |
2415 | ||
fd39ca9a | 2416 | static void |
fe0750e5 | 2417 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2418 | { |
fe0750e5 | 2419 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2420 | |
fe0750e5 BF |
2421 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2422 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2423 | } |
2424 | ||
1da177e4 | 2425 | static int |
599e0a22 BF |
2426 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2427 | clientid_t *clid) | |
2428 | { | |
2429 | return (sop->so_owner.len == owner->len) && | |
2430 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2431 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2432 | } |
2433 | ||
fe0750e5 | 2434 | static struct nfs4_openowner * |
1da177e4 LT |
2435 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2436 | { | |
a50d2ad1 BF |
2437 | struct nfs4_stateowner *so; |
2438 | struct nfs4_openowner *oo; | |
1da177e4 | 2439 | |
16bfdaaf BF |
2440 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2441 | if (!so->so_is_open_owner) | |
2442 | continue; | |
a50d2ad1 BF |
2443 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2444 | oo = openowner(so); | |
2445 | renew_client(oo->oo_owner.so_client); | |
2446 | return oo; | |
2447 | } | |
1da177e4 LT |
2448 | } |
2449 | return NULL; | |
2450 | } | |
2451 | ||
2452 | /* search file_hashtbl[] for file */ | |
2453 | static struct nfs4_file * | |
2454 | find_file(struct inode *ino) | |
2455 | { | |
2456 | unsigned int hashval = file_hashval(ino); | |
2457 | struct nfs4_file *fp; | |
2458 | ||
8b671b80 | 2459 | spin_lock(&recall_lock); |
1da177e4 | 2460 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2461 | if (fp->fi_inode == ino) { |
2462 | get_nfs4_file(fp); | |
8b671b80 | 2463 | spin_unlock(&recall_lock); |
1da177e4 | 2464 | return fp; |
13cd2184 | 2465 | } |
1da177e4 | 2466 | } |
8b671b80 | 2467 | spin_unlock(&recall_lock); |
1da177e4 LT |
2468 | return NULL; |
2469 | } | |
2470 | ||
1da177e4 LT |
2471 | /* |
2472 | * Called to check deny when READ with all zero stateid or | |
2473 | * WRITE with all zero or all one stateid | |
2474 | */ | |
b37ad28b | 2475 | static __be32 |
1da177e4 LT |
2476 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2477 | { | |
2478 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2479 | struct nfs4_file *fp; | |
dcef0413 | 2480 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2481 | __be32 ret; |
1da177e4 LT |
2482 | |
2483 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2484 | ||
2485 | fp = find_file(ino); | |
13cd2184 N |
2486 | if (!fp) |
2487 | return nfs_ok; | |
b700949b | 2488 | ret = nfserr_locked; |
1da177e4 | 2489 | /* Search for conflicting share reservations */ |
13cd2184 N |
2490 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2491 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2492 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2493 | goto out; | |
1da177e4 | 2494 | } |
13cd2184 N |
2495 | ret = nfs_ok; |
2496 | out: | |
2497 | put_nfs4_file(fp); | |
2498 | return ret; | |
1da177e4 LT |
2499 | } |
2500 | ||
6b57d9c8 | 2501 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2502 | { |
1da177e4 LT |
2503 | /* We're assuming the state code never drops its reference |
2504 | * without first removing the lease. Since we're in this lease | |
2505 | * callback (and since the lease code is serialized by the kernel | |
2506 | * lock) we know the server hasn't removed the lease yet, we know | |
2507 | * it's safe to take a reference: */ | |
2508 | atomic_inc(&dp->dl_count); | |
2509 | ||
1da177e4 | 2510 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2511 | |
460781b5 | 2512 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2513 | dp->dl_time = get_seconds(); |
2514 | ||
6b57d9c8 BF |
2515 | nfsd4_cb_recall(dp); |
2516 | } | |
2517 | ||
acfdf5c3 | 2518 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2519 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2520 | { | |
acfdf5c3 BF |
2521 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2522 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2523 | |
acfdf5c3 BF |
2524 | BUG_ON(!fp); |
2525 | /* We assume break_lease is only called once per lease: */ | |
2526 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2527 | /* |
2528 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2529 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2530 | * in time: |
0272e1fd BF |
2531 | */ |
2532 | fl->fl_break_time = 0; | |
1da177e4 | 2533 | |
5d926e8c | 2534 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2535 | fp->fi_had_conflict = true; |
2536 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2537 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2538 | spin_unlock(&recall_lock); |
1da177e4 LT |
2539 | } |
2540 | ||
1da177e4 LT |
2541 | static |
2542 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2543 | { | |
2544 | if (arg & F_UNLCK) | |
2545 | return lease_modify(onlist, arg); | |
2546 | else | |
2547 | return -EAGAIN; | |
2548 | } | |
2549 | ||
7b021967 | 2550 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2551 | .lm_break = nfsd_break_deleg_cb, |
2552 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2553 | }; |
2554 | ||
7a8711c9 BF |
2555 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2556 | { | |
2557 | if (nfsd4_has_session(cstate)) | |
2558 | return nfs_ok; | |
2559 | if (seqid == so->so_seqid - 1) | |
2560 | return nfserr_replay_me; | |
2561 | if (seqid == so->so_seqid) | |
2562 | return nfs_ok; | |
2563 | return nfserr_bad_seqid; | |
2564 | } | |
1da177e4 | 2565 | |
b37ad28b | 2566 | __be32 |
6668958f AA |
2567 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2568 | struct nfsd4_open *open) | |
1da177e4 | 2569 | { |
1da177e4 LT |
2570 | clientid_t *clientid = &open->op_clientid; |
2571 | struct nfs4_client *clp = NULL; | |
2572 | unsigned int strhashval; | |
fe0750e5 | 2573 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2574 | __be32 status; |
1da177e4 | 2575 | |
1da177e4 LT |
2576 | if (STALE_CLIENTID(&open->op_clientid)) |
2577 | return nfserr_stale_clientid; | |
32513b40 BF |
2578 | /* |
2579 | * In case we need it later, after we've already created the | |
2580 | * file and don't want to risk a further failure: | |
2581 | */ | |
2582 | open->op_file = nfsd4_alloc_file(); | |
2583 | if (open->op_file == NULL) | |
2584 | return nfserr_jukebox; | |
1da177e4 | 2585 | |
16bfdaaf | 2586 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2587 | oo = find_openstateowner_str(strhashval, open); |
2588 | open->op_openowner = oo; | |
2589 | if (!oo) { | |
1da177e4 LT |
2590 | clp = find_confirmed_client(clientid); |
2591 | if (clp == NULL) | |
0f442aa2 | 2592 | return nfserr_expired; |
bcf130f9 | 2593 | goto new_owner; |
1da177e4 | 2594 | } |
dad1c067 | 2595 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2596 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2597 | clp = oo->oo_owner.so_client; |
2598 | release_openowner(oo); | |
2599 | open->op_openowner = NULL; | |
bcf130f9 | 2600 | goto new_owner; |
0f442aa2 | 2601 | } |
4cdc951b BF |
2602 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2603 | if (status) | |
2604 | return status; | |
2605 | clp = oo->oo_owner.so_client; | |
2606 | goto alloc_stateid; | |
bcf130f9 BF |
2607 | new_owner: |
2608 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2609 | if (oo == NULL) | |
2610 | return nfserr_jukebox; | |
2611 | open->op_openowner = oo; | |
4cdc951b BF |
2612 | alloc_stateid: |
2613 | open->op_stp = nfs4_alloc_stateid(clp); | |
2614 | if (!open->op_stp) | |
2615 | return nfserr_jukebox; | |
0f442aa2 | 2616 | return nfs_ok; |
1da177e4 LT |
2617 | } |
2618 | ||
b37ad28b | 2619 | static inline __be32 |
4a6e43e6 N |
2620 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2621 | { | |
2622 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2623 | return nfserr_openmode; | |
2624 | else | |
2625 | return nfs_ok; | |
2626 | } | |
2627 | ||
f459e453 | 2628 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2629 | { |
f459e453 | 2630 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2631 | |
f459e453 | 2632 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2633 | } |
2634 | ||
38c2f4b1 | 2635 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2636 | { |
f459e453 | 2637 | struct nfs4_stid *ret; |
24a0111e | 2638 | |
38c2f4b1 | 2639 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2640 | if (!ret) |
2641 | return NULL; | |
2642 | return delegstateid(ret); | |
24a0111e BF |
2643 | } |
2644 | ||
8b289b2c BF |
2645 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2646 | { | |
2647 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2648 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2649 | } | |
2650 | ||
b37ad28b | 2651 | static __be32 |
38c2f4b1 | 2652 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2653 | struct nfs4_delegation **dp) |
2654 | { | |
2655 | int flags; | |
b37ad28b | 2656 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2657 | |
38c2f4b1 | 2658 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2659 | if (*dp == NULL) |
c44c5eeb | 2660 | goto out; |
24a0111e | 2661 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2662 | status = nfs4_check_delegmode(*dp, flags); |
2663 | if (status) | |
2664 | *dp = NULL; | |
c44c5eeb | 2665 | out: |
8b289b2c | 2666 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2667 | return nfs_ok; |
2668 | if (status) | |
2669 | return status; | |
dad1c067 | 2670 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2671 | return nfs_ok; |
567d9829 N |
2672 | } |
2673 | ||
b37ad28b | 2674 | static __be32 |
dcef0413 | 2675 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2676 | { |
dcef0413 | 2677 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2678 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2679 | |
8beefa24 | 2680 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2681 | /* ignore lock owners */ |
2682 | if (local->st_stateowner->so_is_open_owner == 0) | |
2683 | continue; | |
2684 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2685 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2686 | *stpp = local; |
2687 | /* check for conflicting share reservations */ | |
2688 | if (!test_share(local, open)) | |
77eaae8d | 2689 | return nfserr_share_denied; |
1da177e4 | 2690 | } |
77eaae8d | 2691 | return nfs_ok; |
1da177e4 LT |
2692 | } |
2693 | ||
996e0938 BF |
2694 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2695 | { | |
2696 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2697 | } |
2698 | ||
21fb4016 BF |
2699 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2700 | { | |
2701 | int flags = 0; | |
2702 | ||
2703 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2704 | flags |= NFSD_MAY_READ; | |
2705 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2706 | flags |= NFSD_MAY_WRITE; | |
2707 | return flags; | |
2708 | } | |
2709 | ||
0c12eaff CB |
2710 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2711 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2712 | { |
2713 | __be32 status; | |
0c12eaff CB |
2714 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2715 | int access = nfs4_access_to_access(open->op_share_access); | |
2716 | ||
f9d7562f BF |
2717 | if (!fp->fi_fds[oflag]) { |
2718 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2719 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2720 | if (status) |
2721 | return status; | |
2722 | } | |
2723 | nfs4_file_get_access(fp, oflag); | |
2724 | ||
2725 | return nfs_ok; | |
2726 | } | |
2727 | ||
b37ad28b | 2728 | static inline __be32 |
1da177e4 LT |
2729 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2730 | struct nfsd4_open *open) | |
2731 | { | |
2732 | struct iattr iattr = { | |
2733 | .ia_valid = ATTR_SIZE, | |
2734 | .ia_size = 0, | |
2735 | }; | |
2736 | if (!open->op_truncate) | |
2737 | return 0; | |
2738 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2739 | return nfserr_inval; |
1da177e4 LT |
2740 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2741 | } | |
2742 | ||
b37ad28b | 2743 | static __be32 |
dcef0413 | 2744 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2745 | { |
b6d2f1ca | 2746 | u32 op_share_access = open->op_share_access; |
7d947842 | 2747 | bool new_access; |
b37ad28b | 2748 | __be32 status; |
1da177e4 | 2749 | |
7d947842 | 2750 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2751 | if (new_access) { |
0c12eaff | 2752 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2753 | if (status) |
2754 | return status; | |
6c26d08f | 2755 | } |
1da177e4 LT |
2756 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2757 | if (status) { | |
f9d7562f | 2758 | if (new_access) { |
f197c271 | 2759 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2760 | nfs4_file_put_access(fp, oflag); |
2761 | } | |
1da177e4 LT |
2762 | return status; |
2763 | } | |
2764 | /* remember the open */ | |
24a0111e | 2765 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2766 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2767 | |
2768 | return nfs_ok; | |
2769 | } | |
2770 | ||
2771 | ||
1da177e4 | 2772 | static void |
37515177 | 2773 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2774 | { |
dad1c067 | 2775 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2776 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2777 | } |
2778 | ||
14a24e99 BF |
2779 | /* Should we give out recallable state?: */ |
2780 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2781 | { | |
2782 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2783 | return true; | |
2784 | /* | |
2785 | * In the sessions case, since we don't have to establish a | |
2786 | * separate connection for callbacks, we assume it's OK | |
2787 | * until we hear otherwise: | |
2788 | */ | |
2789 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2790 | } | |
2791 | ||
22d38c4c BF |
2792 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2793 | { | |
2794 | struct file_lock *fl; | |
2795 | ||
2796 | fl = locks_alloc_lock(); | |
2797 | if (!fl) | |
2798 | return NULL; | |
2799 | locks_init_lock(fl); | |
2800 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2801 | fl->fl_flags = FL_LEASE; | |
2802 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2803 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2804 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2805 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2806 | return fl; |
2807 | } | |
2808 | ||
edab9782 BF |
2809 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2810 | { | |
acfdf5c3 | 2811 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2812 | struct file_lock *fl; |
2813 | int status; | |
2814 | ||
2815 | fl = nfs4_alloc_init_lease(dp, flag); | |
2816 | if (!fl) | |
2817 | return -ENOMEM; | |
acfdf5c3 | 2818 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2819 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2820 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2821 | if (status) { |
acfdf5c3 | 2822 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2823 | locks_free_lock(fl); |
2824 | return -ENOMEM; | |
2825 | } | |
acfdf5c3 BF |
2826 | fp->fi_lease = fl; |
2827 | fp->fi_deleg_file = fl->fl_file; | |
2828 | get_file(fp->fi_deleg_file); | |
2829 | atomic_set(&fp->fi_delegees, 1); | |
2830 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2835 | { | |
2836 | struct nfs4_file *fp = dp->dl_file; | |
2837 | ||
2838 | if (!fp->fi_lease) | |
2839 | return nfs4_setlease(dp, flag); | |
2840 | spin_lock(&recall_lock); | |
2841 | if (fp->fi_had_conflict) { | |
2842 | spin_unlock(&recall_lock); | |
2843 | return -EAGAIN; | |
2844 | } | |
2845 | atomic_inc(&fp->fi_delegees); | |
2846 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2847 | spin_unlock(&recall_lock); | |
2a74aba7 | 2848 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2849 | return 0; |
2850 | } | |
2851 | ||
1da177e4 LT |
2852 | /* |
2853 | * Attempt to hand out a delegation. | |
2854 | */ | |
2855 | static void | |
dcef0413 | 2856 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2857 | { |
2858 | struct nfs4_delegation *dp; | |
fe0750e5 | 2859 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2860 | int cb_up; |
1da177e4 LT |
2861 | int status, flag = 0; |
2862 | ||
fe0750e5 | 2863 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2864 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2865 | open->op_recall = 0; |
2866 | switch (open->op_claim_type) { | |
2867 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2868 | if (!cb_up) |
7b190fec N |
2869 | open->op_recall = 1; |
2870 | flag = open->op_delegate_type; | |
2871 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2872 | goto out; | |
2873 | break; | |
2874 | case NFS4_OPEN_CLAIM_NULL: | |
2875 | /* Let's not give out any delegations till everyone's | |
2876 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2877 | if (locks_in_grace()) |
7b190fec | 2878 | goto out; |
dad1c067 | 2879 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2880 | goto out; |
2881 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2882 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2883 | else | |
2884 | flag = NFS4_OPEN_DELEGATE_READ; | |
2885 | break; | |
2886 | default: | |
2887 | goto out; | |
2888 | } | |
1da177e4 | 2889 | |
fe0750e5 | 2890 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2891 | if (dp == NULL) |
2892 | goto out_no_deleg; | |
acfdf5c3 | 2893 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2894 | if (status) |
dd239cc0 | 2895 | goto out_free; |
1da177e4 | 2896 | |
d5477a8d | 2897 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2898 | |
8c10cbdb | 2899 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2900 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2901 | out: |
7b190fec N |
2902 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2903 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2904 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2905 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2906 | open->op_delegate_type = flag; |
dd239cc0 BF |
2907 | return; |
2908 | out_free: | |
acfdf5c3 | 2909 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2910 | out_no_deleg: |
2911 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2912 | goto out; | |
1da177e4 LT |
2913 | } |
2914 | ||
2915 | /* | |
2916 | * called with nfs4_lock_state() held. | |
2917 | */ | |
b37ad28b | 2918 | __be32 |
1da177e4 LT |
2919 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2920 | { | |
6668958f | 2921 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2922 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2923 | struct nfs4_file *fp = NULL; |
2924 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2925 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2926 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2927 | __be32 status; |
1da177e4 | 2928 | |
1da177e4 LT |
2929 | /* |
2930 | * Lookup file; if found, lookup stateid and check open request, | |
2931 | * and check for delegations in the process of being recalled. | |
2932 | * If not found, create the nfs4_file struct | |
2933 | */ | |
2934 | fp = find_file(ino); | |
2935 | if (fp) { | |
2936 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2937 | goto out; | |
38c2f4b1 | 2938 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
2939 | if (status) |
2940 | goto out; | |
1da177e4 | 2941 | } else { |
c44c5eeb | 2942 | status = nfserr_bad_stateid; |
8b289b2c | 2943 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 2944 | goto out; |
3e772463 | 2945 | status = nfserr_jukebox; |
32513b40 BF |
2946 | fp = open->op_file; |
2947 | open->op_file = NULL; | |
2948 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
2949 | } |
2950 | ||
2951 | /* | |
2952 | * OPEN the file, or upgrade an existing OPEN. | |
2953 | * If truncate fails, the OPEN fails. | |
2954 | */ | |
2955 | if (stp) { | |
2956 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2957 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2958 | if (status) |
2959 | goto out; | |
2960 | } else { | |
4cdc951b | 2961 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 2962 | if (status) |
1da177e4 | 2963 | goto out; |
4cdc951b BF |
2964 | stp = open->op_stp; |
2965 | open->op_stp = NULL; | |
996e0938 | 2966 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2967 | status = nfsd4_truncate(rqstp, current_fh, open); |
2968 | if (status) { | |
2283963f | 2969 | release_open_stateid(stp); |
1da177e4 LT |
2970 | goto out; |
2971 | } | |
2972 | } | |
dcef0413 BF |
2973 | update_stateid(&stp->st_stid.sc_stateid); |
2974 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2975 | |
4dc6ec00 | 2976 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2977 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2978 | |
1da177e4 LT |
2979 | /* |
2980 | * Attempt to hand out a delegation. No error return, because the | |
2981 | * OPEN succeeds even if we fail. | |
2982 | */ | |
2983 | nfs4_open_delegation(current_fh, open, stp); | |
2984 | ||
2985 | status = nfs_ok; | |
2986 | ||
8c10cbdb | 2987 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2988 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2989 | out: |
13cd2184 N |
2990 | if (fp) |
2991 | put_nfs4_file(fp); | |
37515177 N |
2992 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2993 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2994 | /* |
2995 | * To finish the open response, we just need to set the rflags. | |
2996 | */ | |
2997 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 2998 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 2999 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3000 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3001 | ||
3002 | return status; | |
3003 | } | |
3004 | ||
d29b20cd BF |
3005 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3006 | { | |
3007 | if (open->op_openowner) { | |
3008 | struct nfs4_openowner *oo = open->op_openowner; | |
3009 | ||
3010 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3011 | list_del_init(&oo->oo_close_lru); | |
3012 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3013 | if (status) { | |
3014 | release_openowner(oo); | |
3015 | open->op_openowner = NULL; | |
3016 | } else | |
3017 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3018 | } | |
3019 | } | |
32513b40 BF |
3020 | if (open->op_file) |
3021 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3022 | if (open->op_stp) |
3023 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3024 | } |
3025 | ||
b37ad28b | 3026 | __be32 |
b591480b BF |
3027 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3028 | clientid_t *clid) | |
1da177e4 LT |
3029 | { |
3030 | struct nfs4_client *clp; | |
b37ad28b | 3031 | __be32 status; |
1da177e4 LT |
3032 | |
3033 | nfs4_lock_state(); | |
3034 | dprintk("process_renew(%08x/%08x): starting\n", | |
3035 | clid->cl_boot, clid->cl_id); | |
3036 | status = nfserr_stale_clientid; | |
3037 | if (STALE_CLIENTID(clid)) | |
3038 | goto out; | |
3039 | clp = find_confirmed_client(clid); | |
3040 | status = nfserr_expired; | |
3041 | if (clp == NULL) { | |
3042 | /* We assume the client took too long to RENEW. */ | |
3043 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3044 | goto out; | |
3045 | } | |
1da177e4 | 3046 | status = nfserr_cb_path_down; |
ea1da636 | 3047 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3048 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3049 | goto out; |
3050 | status = nfs_ok; | |
3051 | out: | |
3052 | nfs4_unlock_state(); | |
3053 | return status; | |
3054 | } | |
3055 | ||
c47d832b | 3056 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3057 | }; |
3058 | ||
a76b4319 | 3059 | static void |
af558e33 | 3060 | nfsd4_end_grace(void) |
a76b4319 N |
3061 | { |
3062 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3063 | nfsd4_recdir_purge_old(); |
af558e33 | 3064 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3065 | /* |
3066 | * Now that every NFSv4 client has had the chance to recover and | |
3067 | * to see the (possibly new, possibly shorter) lease time, we | |
3068 | * can safely set the next grace time to the current lease time: | |
3069 | */ | |
3070 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3071 | } |
3072 | ||
fd39ca9a | 3073 | static time_t |
1da177e4 LT |
3074 | nfs4_laundromat(void) |
3075 | { | |
3076 | struct nfs4_client *clp; | |
fe0750e5 | 3077 | struct nfs4_openowner *oo; |
1da177e4 LT |
3078 | struct nfs4_delegation *dp; |
3079 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3080 | time_t cutoff = get_seconds() - nfsd4_lease; |
3081 | time_t t, clientid_val = nfsd4_lease; | |
3082 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3083 | |
3084 | nfs4_lock_state(); | |
3085 | ||
3086 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3087 | if (locks_in_grace()) |
3088 | nfsd4_end_grace(); | |
36acb66b BH |
3089 | INIT_LIST_HEAD(&reaplist); |
3090 | spin_lock(&client_lock); | |
1da177e4 LT |
3091 | list_for_each_safe(pos, next, &client_lru) { |
3092 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3093 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3094 | t = clp->cl_time - cutoff; | |
3095 | if (clientid_val > t) | |
3096 | clientid_val = t; | |
3097 | break; | |
3098 | } | |
d7682988 BH |
3099 | if (atomic_read(&clp->cl_refcount)) { |
3100 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3101 | clp->cl_clientid.cl_id); | |
3102 | continue; | |
3103 | } | |
3104 | unhash_client_locked(clp); | |
3105 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3106 | } |
3107 | spin_unlock(&client_lock); | |
3108 | list_for_each_safe(pos, next, &reaplist) { | |
3109 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3110 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3111 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3112 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3113 | expire_client(clp); |
3114 | } | |
1da177e4 LT |
3115 | spin_lock(&recall_lock); |
3116 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3117 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3118 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3119 | u = dp->dl_time - cutoff; | |
3120 | if (test_val > u) | |
3121 | test_val = u; | |
3122 | break; | |
3123 | } | |
1da177e4 LT |
3124 | list_move(&dp->dl_recall_lru, &reaplist); |
3125 | } | |
3126 | spin_unlock(&recall_lock); | |
3127 | list_for_each_safe(pos, next, &reaplist) { | |
3128 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3129 | list_del_init(&dp->dl_recall_lru); | |
3130 | unhash_delegation(dp); | |
3131 | } | |
cf07d2ea | 3132 | test_val = nfsd4_lease; |
1da177e4 | 3133 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3134 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3135 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3136 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3137 | if (test_val > u) |
3138 | test_val = u; | |
3139 | break; | |
3140 | } | |
fe0750e5 | 3141 | release_openowner(oo); |
1da177e4 LT |
3142 | } |
3143 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3144 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3145 | nfs4_unlock_state(); | |
3146 | return clientid_val; | |
3147 | } | |
3148 | ||
a254b246 HH |
3149 | static struct workqueue_struct *laundry_wq; |
3150 | static void laundromat_main(struct work_struct *); | |
3151 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3152 | ||
3153 | static void | |
c4028958 | 3154 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3155 | { |
3156 | time_t t; | |
3157 | ||
3158 | t = nfs4_laundromat(); | |
3159 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3160 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3161 | } |
3162 | ||
f7a4d872 | 3163 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3164 | { |
f7a4d872 BF |
3165 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3166 | return nfserr_bad_stateid; | |
3167 | return nfs_ok; | |
1da177e4 LT |
3168 | } |
3169 | ||
3170 | static int | |
3171 | STALE_STATEID(stateid_t *stateid) | |
3172 | { | |
d3b313a4 | 3173 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3174 | return 0; |
3175 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3176 | STATEID_VAL(stateid)); |
e4e83ea4 | 3177 | return 1; |
1da177e4 LT |
3178 | } |
3179 | ||
3180 | static inline int | |
3181 | access_permit_read(unsigned long access_bmap) | |
3182 | { | |
3183 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3184 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3185 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3186 | } | |
3187 | ||
3188 | static inline int | |
3189 | access_permit_write(unsigned long access_bmap) | |
3190 | { | |
3191 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3192 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3193 | } | |
3194 | ||
3195 | static | |
dcef0413 | 3196 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3197 | { |
b37ad28b | 3198 | __be32 status = nfserr_openmode; |
1da177e4 | 3199 | |
02921914 BF |
3200 | /* For lock stateid's, we test the parent open, not the lock: */ |
3201 | if (stp->st_openstp) | |
3202 | stp = stp->st_openstp; | |
1da177e4 LT |
3203 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3204 | goto out; | |
3205 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3206 | goto out; | |
3207 | status = nfs_ok; | |
3208 | out: | |
3209 | return status; | |
3210 | } | |
3211 | ||
b37ad28b | 3212 | static inline __be32 |
1da177e4 LT |
3213 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3214 | { | |
203a8c8e | 3215 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3216 | return nfs_ok; |
af558e33 | 3217 | else if (locks_in_grace()) { |
25985edc | 3218 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3219 | * conflicting state; so we must wait out the grace period. */ |
3220 | return nfserr_grace; | |
3221 | } else if (flags & WR_STATE) | |
3222 | return nfs4_share_conflict(current_fh, | |
3223 | NFS4_SHARE_DENY_WRITE); | |
3224 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3225 | return nfs4_share_conflict(current_fh, | |
3226 | NFS4_SHARE_DENY_READ); | |
3227 | } | |
3228 | ||
3229 | /* | |
3230 | * Allow READ/WRITE during grace period on recovered state only for files | |
3231 | * that are not able to provide mandatory locking. | |
3232 | */ | |
3233 | static inline int | |
18f82731 | 3234 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3235 | { |
203a8c8e | 3236 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3237 | } |
3238 | ||
81b82965 BF |
3239 | /* Returns true iff a is later than b: */ |
3240 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3241 | { | |
3242 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3243 | } | |
3244 | ||
28dde241 | 3245 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3246 | { |
6668958f AA |
3247 | /* |
3248 | * When sessions are used the stateid generation number is ignored | |
3249 | * when it is zero. | |
3250 | */ | |
28dde241 | 3251 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3252 | return nfs_ok; |
3253 | ||
3254 | if (in->si_generation == ref->si_generation) | |
3255 | return nfs_ok; | |
6668958f | 3256 | |
0836f587 | 3257 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3258 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3259 | return nfserr_bad_stateid; |
3260 | /* | |
81b82965 BF |
3261 | * However, we could see a stateid from the past, even from a |
3262 | * non-buggy client. For example, if the client sends a lock | |
3263 | * while some IO is outstanding, the lock may bump si_generation | |
3264 | * while the IO is still in flight. The client could avoid that | |
3265 | * situation by waiting for responses on all the IO requests, | |
3266 | * but better performance may result in retrying IO that | |
3267 | * receives an old_stateid error if requests are rarely | |
3268 | * reordered in flight: | |
0836f587 | 3269 | */ |
81b82965 | 3270 | return nfserr_old_stateid; |
0836f587 BF |
3271 | } |
3272 | ||
38c2f4b1 | 3273 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3274 | { |
97b7e3b6 BF |
3275 | struct nfs4_stid *s; |
3276 | struct nfs4_ol_stateid *ols; | |
3277 | __be32 status; | |
17456804 BS |
3278 | |
3279 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3280 | return nfserr_stale_stateid; |
17456804 | 3281 | |
38c2f4b1 | 3282 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3283 | if (!s) |
3284 | return nfserr_stale_stateid; | |
36279ac1 | 3285 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3286 | if (status) |
97b7e3b6 BF |
3287 | return status; |
3288 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3289 | return nfs_ok; | |
3290 | ols = openlockstateid(s); | |
3291 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3292 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3293 | return nfserr_bad_stateid; |
3294 | return nfs_ok; | |
17456804 BS |
3295 | } |
3296 | ||
38c2f4b1 BF |
3297 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3298 | { | |
3299 | struct nfs4_client *cl; | |
3300 | ||
3301 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3302 | return nfserr_bad_stateid; | |
3303 | if (STALE_STATEID(stateid)) | |
3304 | return nfserr_stale_stateid; | |
3305 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3306 | if (!cl) | |
3307 | return nfserr_expired; | |
3308 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3309 | if (!*s) | |
3310 | return nfserr_bad_stateid; | |
3311 | return nfs_ok; | |
3312 | ||
3313 | } | |
3314 | ||
1da177e4 LT |
3315 | /* |
3316 | * Checks for stateid operations | |
3317 | */ | |
b37ad28b | 3318 | __be32 |
dd453dfd BH |
3319 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3320 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3321 | { |
69064a27 | 3322 | struct nfs4_stid *s; |
dcef0413 | 3323 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3324 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3325 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3326 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3327 | __be32 status; |
1da177e4 | 3328 | |
1da177e4 LT |
3329 | if (filpp) |
3330 | *filpp = NULL; | |
3331 | ||
18f82731 | 3332 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3333 | return nfserr_grace; |
3334 | ||
3335 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3336 | return check_special_stateids(current_fh, stateid, flags); | |
3337 | ||
38c2f4b1 BF |
3338 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3339 | if (status) | |
3340 | return status; | |
69064a27 BF |
3341 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3342 | if (status) | |
3343 | goto out; | |
f7a4d872 BF |
3344 | switch (s->sc_type) { |
3345 | case NFS4_DELEG_STID: | |
69064a27 | 3346 | dp = delegstateid(s); |
dc9bf700 BF |
3347 | status = nfs4_check_delegmode(dp, flags); |
3348 | if (status) | |
3349 | goto out; | |
43b0178e | 3350 | if (filpp) { |
acfdf5c3 | 3351 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3352 | BUG_ON(!*filpp); |
3353 | } | |
f7a4d872 BF |
3354 | break; |
3355 | case NFS4_OPEN_STID: | |
3356 | case NFS4_LOCK_STID: | |
69064a27 | 3357 | stp = openlockstateid(s); |
f7a4d872 BF |
3358 | status = nfs4_check_fh(current_fh, stp); |
3359 | if (status) | |
1da177e4 | 3360 | goto out; |
fe0750e5 | 3361 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3362 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3363 | goto out; |
a4455be0 BF |
3364 | status = nfs4_check_openmode(stp, flags); |
3365 | if (status) | |
1da177e4 | 3366 | goto out; |
f9d7562f BF |
3367 | if (filpp) { |
3368 | if (flags & RD_STATE) | |
3369 | *filpp = find_readable_file(stp->st_file); | |
3370 | else | |
3371 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3372 | } |
f7a4d872 BF |
3373 | break; |
3374 | default: | |
3375 | return nfserr_bad_stateid; | |
1da177e4 LT |
3376 | } |
3377 | status = nfs_ok; | |
3378 | out: | |
3379 | return status; | |
3380 | } | |
3381 | ||
e1ca12df | 3382 | static __be32 |
dcef0413 | 3383 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3384 | { |
fe0750e5 | 3385 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3386 | return nfserr_locks_held; |
3387 | release_lock_stateid(stp); | |
3388 | return nfs_ok; | |
3389 | } | |
3390 | ||
17456804 BS |
3391 | /* |
3392 | * Test if the stateid is valid | |
3393 | */ | |
3394 | __be32 | |
3395 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3396 | struct nfsd4_test_stateid *test_stateid) | |
3397 | { | |
36279ac1 | 3398 | /* real work is done during encoding */ |
17456804 BS |
3399 | return nfs_ok; |
3400 | } | |
3401 | ||
e1ca12df BS |
3402 | __be32 |
3403 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3404 | struct nfsd4_free_stateid *free_stateid) | |
3405 | { | |
3406 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3407 | struct nfs4_stid *s; |
38c2f4b1 | 3408 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3409 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3410 | |
3411 | nfs4_lock_state(); | |
38c2f4b1 | 3412 | s = find_stateid(cl, stateid); |
2da1cec7 | 3413 | if (!s) |
81b82965 | 3414 | goto out; |
2da1cec7 BF |
3415 | switch (s->sc_type) { |
3416 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3417 | ret = nfserr_locks_held; |
3418 | goto out; | |
2da1cec7 BF |
3419 | case NFS4_OPEN_STID: |
3420 | case NFS4_LOCK_STID: | |
3421 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3422 | if (ret) | |
3423 | goto out; | |
3424 | if (s->sc_type == NFS4_LOCK_STID) | |
3425 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3426 | else | |
3427 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3428 | break; |
3429 | default: | |
3430 | ret = nfserr_bad_stateid; | |
e1ca12df | 3431 | } |
e1ca12df BS |
3432 | out: |
3433 | nfs4_unlock_state(); | |
3434 | return ret; | |
3435 | } | |
3436 | ||
4c4cd222 N |
3437 | static inline int |
3438 | setlkflg (int type) | |
3439 | { | |
3440 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3441 | RD_STATE : WR_STATE; | |
3442 | } | |
1da177e4 | 3443 | |
dcef0413 | 3444 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3445 | { |
3446 | struct svc_fh *current_fh = &cstate->current_fh; | |
3447 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3448 | __be32 status; | |
3449 | ||
c0a5d93e BF |
3450 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3451 | if (status) | |
3452 | return status; | |
f7a4d872 BF |
3453 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3454 | /* | |
3455 | * "Closed" stateid's exist *only* to return | |
3456 | * nfserr_replay_me from the previous step. | |
3457 | */ | |
3458 | return nfserr_bad_stateid; | |
3459 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3460 | if (status) | |
3461 | return status; | |
3462 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3463 | } |
3464 | ||
1da177e4 LT |
3465 | /* |
3466 | * Checks for sequence id mutating operations. | |
3467 | */ | |
b37ad28b | 3468 | static __be32 |
dd453dfd | 3469 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3470 | stateid_t *stateid, char typemask, |
dcef0413 | 3471 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3472 | { |
0836f587 | 3473 | __be32 status; |
38c2f4b1 | 3474 | struct nfs4_stid *s; |
1da177e4 | 3475 | |
8c10cbdb BH |
3476 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3477 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3478 | |
1da177e4 | 3479 | *stpp = NULL; |
38c2f4b1 | 3480 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3481 | if (status) |
3482 | return status; | |
38c2f4b1 | 3483 | *stpp = openlockstateid(s); |
c0a5d93e | 3484 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3485 | |
c0a5d93e BF |
3486 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3487 | } | |
39325bd0 | 3488 | |
dcef0413 | 3489 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3490 | { |
3491 | __be32 status; | |
3492 | struct nfs4_openowner *oo; | |
1da177e4 | 3493 | |
c0a5d93e | 3494 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3495 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3496 | if (status) |
3497 | return status; | |
c0a5d93e | 3498 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3499 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3500 | return nfserr_bad_stateid; |
3a4f98bb | 3501 | return nfs_ok; |
1da177e4 LT |
3502 | } |
3503 | ||
b37ad28b | 3504 | __be32 |
ca364317 | 3505 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3506 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3507 | { |
b37ad28b | 3508 | __be32 status; |
fe0750e5 | 3509 | struct nfs4_openowner *oo; |
dcef0413 | 3510 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3511 | |
3512 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3513 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3514 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3515 | |
ca364317 | 3516 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3517 | if (status) |
3518 | return status; | |
1da177e4 LT |
3519 | |
3520 | nfs4_lock_state(); | |
3521 | ||
9072d5c6 | 3522 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3523 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3524 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3525 | if (status) |
68b66e82 | 3526 | goto out; |
fe0750e5 | 3527 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3528 | status = nfserr_bad_stateid; |
dad1c067 | 3529 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3530 | goto out; |
dad1c067 | 3531 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3532 | update_stateid(&stp->st_stid.sc_stateid); |
3533 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3534 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3535 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3536 | |
fe0750e5 | 3537 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3538 | status = nfs_ok; |
1da177e4 | 3539 | out: |
5ec094c1 BF |
3540 | if (!cstate->replay_owner) |
3541 | nfs4_unlock_state(); | |
1da177e4 LT |
3542 | return status; |
3543 | } | |
3544 | ||
6409a5a6 | 3545 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3546 | { |
6409a5a6 BF |
3547 | if (!test_bit(access, &stp->st_access_bmap)) |
3548 | return; | |
3549 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
3550 | __clear_bit(access, &stp->st_access_bmap); | |
3551 | } | |
f197c271 | 3552 | |
6409a5a6 BF |
3553 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3554 | { | |
3555 | switch (to_access) { | |
3556 | case NFS4_SHARE_ACCESS_READ: | |
3557 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3558 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3559 | break; | |
3560 | case NFS4_SHARE_ACCESS_WRITE: | |
3561 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3562 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3563 | break; | |
3564 | case NFS4_SHARE_ACCESS_BOTH: | |
3565 | break; | |
3566 | default: | |
3567 | BUG(); | |
1da177e4 LT |
3568 | } |
3569 | } | |
3570 | ||
3571 | static void | |
3572 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3573 | { | |
3574 | int i; | |
3575 | for (i = 0; i < 4; i++) { | |
3576 | if ((i & deny) != i) | |
3577 | __clear_bit(i, bmap); | |
3578 | } | |
3579 | } | |
3580 | ||
b37ad28b | 3581 | __be32 |
ca364317 BF |
3582 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3583 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3584 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3585 | { |
b37ad28b | 3586 | __be32 status; |
dcef0413 | 3587 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3588 | |
3589 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3590 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3591 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3592 | |
c30e92df BF |
3593 | /* We don't yet support WANT bits: */ |
3594 | od->od_share_access &= NFS4_SHARE_ACCESS_MASK; | |
1da177e4 LT |
3595 | |
3596 | nfs4_lock_state(); | |
c0a5d93e BF |
3597 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3598 | &od->od_stateid, &stp); | |
9072d5c6 | 3599 | if (status) |
1da177e4 | 3600 | goto out; |
1da177e4 LT |
3601 | status = nfserr_inval; |
3602 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3603 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3604 | stp->st_access_bmap, od->od_share_access); | |
3605 | goto out; | |
3606 | } | |
3607 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3608 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3609 | stp->st_deny_bmap, od->od_share_deny); | |
3610 | goto out; | |
3611 | } | |
6409a5a6 | 3612 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3613 | |
1da177e4 LT |
3614 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3615 | ||
dcef0413 BF |
3616 | update_stateid(&stp->st_stid.sc_stateid); |
3617 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3618 | status = nfs_ok; |
3619 | out: | |
5ec094c1 BF |
3620 | if (!cstate->replay_owner) |
3621 | nfs4_unlock_state(); | |
1da177e4 LT |
3622 | return status; |
3623 | } | |
3624 | ||
38c387b5 BF |
3625 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3626 | { | |
3627 | struct nfs4_openowner *oo; | |
3628 | struct nfs4_ol_stateid *s; | |
3629 | ||
3630 | if (!so->so_is_open_owner) | |
3631 | return; | |
3632 | oo = openowner(so); | |
3633 | s = oo->oo_last_closed_stid; | |
3634 | if (!s) | |
3635 | return; | |
3636 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3637 | /* Release the last_closed_stid on the next seqid bump: */ | |
3638 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3639 | return; | |
3640 | } | |
3641 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3642 | release_last_closed_stateid(oo); |
3643 | } | |
3644 | ||
3645 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3646 | { | |
3647 | unhash_open_stateid(s); | |
3648 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3649 | } |
3650 | ||
1da177e4 LT |
3651 | /* |
3652 | * nfs4_unlock_state() called after encode | |
3653 | */ | |
b37ad28b | 3654 | __be32 |
ca364317 | 3655 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3656 | struct nfsd4_close *close) |
1da177e4 | 3657 | { |
b37ad28b | 3658 | __be32 status; |
fe0750e5 | 3659 | struct nfs4_openowner *oo; |
dcef0413 | 3660 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3661 | |
3662 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3663 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3664 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3665 | |
3666 | nfs4_lock_state(); | |
f7a4d872 BF |
3667 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3668 | &close->cl_stateid, | |
3669 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3670 | &stp); | |
9072d5c6 | 3671 | if (status) |
1da177e4 | 3672 | goto out; |
fe0750e5 | 3673 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3674 | status = nfs_ok; |
dcef0413 BF |
3675 | update_stateid(&stp->st_stid.sc_stateid); |
3676 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3677 | |
f7a4d872 | 3678 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3679 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3680 | |
3681 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3682 | * released by the laundromat service after the lease period | |
3683 | * to enable us to handle CLOSE replay | |
3684 | */ | |
fe0750e5 BF |
3685 | if (list_empty(&oo->oo_owner.so_stateids)) |
3686 | move_to_close_lru(oo); | |
1da177e4 | 3687 | out: |
5ec094c1 BF |
3688 | if (!cstate->replay_owner) |
3689 | nfs4_unlock_state(); | |
1da177e4 LT |
3690 | return status; |
3691 | } | |
3692 | ||
b37ad28b | 3693 | __be32 |
ca364317 BF |
3694 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3695 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3696 | { |
203a8c8e BF |
3697 | struct nfs4_delegation *dp; |
3698 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3699 | struct nfs4_stid *s; |
203a8c8e | 3700 | struct inode *inode; |
b37ad28b | 3701 | __be32 status; |
1da177e4 | 3702 | |
ca364317 | 3703 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3704 | return status; |
3705 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3706 | |
3707 | nfs4_lock_state(); | |
38c2f4b1 BF |
3708 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3709 | if (status) | |
203a8c8e | 3710 | goto out; |
38c2f4b1 | 3711 | dp = delegstateid(s); |
d5477a8d | 3712 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3713 | if (status) |
3714 | goto out; | |
203a8c8e BF |
3715 | |
3716 | unhash_delegation(dp); | |
1da177e4 | 3717 | out: |
203a8c8e BF |
3718 | nfs4_unlock_state(); |
3719 | ||
1da177e4 LT |
3720 | return status; |
3721 | } | |
3722 | ||
3723 | ||
1da177e4 | 3724 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3725 | |
009673b4 BF |
3726 | #define LOCKOWNER_INO_HASH_BITS 8 |
3727 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3728 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
3729 | ||
87df4de8 BH |
3730 | static inline u64 |
3731 | end_offset(u64 start, u64 len) | |
3732 | { | |
3733 | u64 end; | |
3734 | ||
3735 | end = start + len; | |
3736 | return end >= start ? end: NFS4_MAX_UINT64; | |
3737 | } | |
3738 | ||
3739 | /* last octet in a range */ | |
3740 | static inline u64 | |
3741 | last_byte_offset(u64 start, u64 len) | |
3742 | { | |
3743 | u64 end; | |
3744 | ||
3745 | BUG_ON(!len); | |
3746 | end = start + len; | |
3747 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3748 | } | |
3749 | ||
009673b4 BF |
3750 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
3751 | { | |
3752 | return (file_hashval(inode) + cl_id | |
3753 | + opaque_hashval(ownername->data, ownername->len)) | |
3754 | & LOCKOWNER_INO_HASH_MASK; | |
3755 | } | |
3756 | ||
3757 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; | |
3758 | ||
1da177e4 LT |
3759 | /* |
3760 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3761 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3762 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3763 | * locking, this prevents us from being completely protocol-compliant. The | |
3764 | * real solution to this problem is to start using unsigned file offsets in | |
3765 | * the VFS, but this is a very deep change! | |
3766 | */ | |
3767 | static inline void | |
3768 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3769 | { | |
3770 | if (lock->fl_start < 0) | |
3771 | lock->fl_start = OFFSET_MAX; | |
3772 | if (lock->fl_end < 0) | |
3773 | lock->fl_end = OFFSET_MAX; | |
3774 | } | |
3775 | ||
d5b9026a N |
3776 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3777 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3778 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3779 | }; |
1da177e4 LT |
3780 | |
3781 | static inline void | |
3782 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3783 | { | |
fe0750e5 | 3784 | struct nfs4_lockowner *lo; |
1da177e4 | 3785 | |
d5b9026a | 3786 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3787 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3788 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3789 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3790 | if (!deny->ld_owner.data) |
3791 | /* We just don't care that much */ | |
3792 | goto nevermind; | |
fe0750e5 BF |
3793 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3794 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3795 | } else { |
7c13f344 BF |
3796 | nevermind: |
3797 | deny->ld_owner.len = 0; | |
3798 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3799 | deny->ld_clientid.cl_boot = 0; |
3800 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3801 | } |
3802 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3803 | deny->ld_length = NFS4_MAX_UINT64; |
3804 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3805 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3806 | deny->ld_type = NFS4_READ_LT; | |
3807 | if (fl->fl_type != F_RDLCK) | |
3808 | deny->ld_type = NFS4_WRITE_LT; | |
3809 | } | |
3810 | ||
b93d87c1 BF |
3811 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3812 | { | |
3813 | struct nfs4_ol_stateid *lst; | |
3814 | ||
3815 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3816 | return false; | |
3817 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3818 | struct nfs4_ol_stateid, st_perstateowner); | |
3819 | return lst->st_file->fi_inode == inode; | |
3820 | } | |
3821 | ||
fe0750e5 BF |
3822 | static struct nfs4_lockowner * |
3823 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3824 | struct xdr_netobj *owner) |
3825 | { | |
009673b4 | 3826 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3827 | struct nfs4_lockowner *lo; |
1da177e4 | 3828 | |
009673b4 | 3829 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3830 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3831 | return lo; | |
1da177e4 LT |
3832 | } |
3833 | return NULL; | |
3834 | } | |
3835 | ||
dcef0413 | 3836 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3837 | { |
009673b4 BF |
3838 | struct inode *inode = open_stp->st_file->fi_inode; |
3839 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3840 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3841 | ||
16bfdaaf | 3842 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3843 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3844 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3845 | } |
3846 | ||
1da177e4 LT |
3847 | /* |
3848 | * Alloc a lock owner structure. | |
3849 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3850 | * occurred. |
1da177e4 | 3851 | * |
16bfdaaf | 3852 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3853 | */ |
3854 | ||
fe0750e5 | 3855 | static struct nfs4_lockowner * |
dcef0413 | 3856 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3857 | struct nfs4_lockowner *lo; |
1da177e4 | 3858 | |
fe0750e5 BF |
3859 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3860 | if (!lo) | |
1da177e4 | 3861 | return NULL; |
fe0750e5 BF |
3862 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3863 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3864 | /* It is the openowner seqid that will be incremented in encode in the |
3865 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3866 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3867 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3868 | return lo; | |
1da177e4 LT |
3869 | } |
3870 | ||
dcef0413 BF |
3871 | static struct nfs4_ol_stateid * |
3872 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3873 | { |
dcef0413 | 3874 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3875 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3876 | |
996e0938 | 3877 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3878 | if (stp == NULL) |
6136d2b4 | 3879 | return NULL; |
996e0938 | 3880 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3881 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3882 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3883 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3884 | get_nfs4_file(fp); |
1da177e4 | 3885 | stp->st_file = fp; |
0997b173 | 3886 | stp->st_access_bmap = 0; |
1da177e4 | 3887 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3888 | stp->st_openstp = open_stp; |
1da177e4 LT |
3889 | return stp; |
3890 | } | |
3891 | ||
fd39ca9a | 3892 | static int |
1da177e4 LT |
3893 | check_lock_length(u64 offset, u64 length) |
3894 | { | |
87df4de8 | 3895 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3896 | LOFF_OVERFLOW(offset, length))); |
3897 | } | |
3898 | ||
dcef0413 | 3899 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3900 | { |
3901 | struct nfs4_file *fp = lock_stp->st_file; | |
3902 | int oflag = nfs4_access_to_omode(access); | |
3903 | ||
3904 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3905 | return; | |
3906 | nfs4_file_get_access(fp, oflag); | |
3907 | __set_bit(access, &lock_stp->st_access_bmap); | |
3908 | } | |
3909 | ||
64a284d0 BF |
3910 | __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
3911 | { | |
3912 | struct nfs4_file *fi = ost->st_file; | |
3913 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
3914 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
3915 | struct nfs4_lockowner *lo; | |
3916 | unsigned int strhashval; | |
3917 | ||
3918 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
3919 | if (lo) { | |
3920 | if (!cstate->minorversion) | |
3921 | return nfserr_bad_seqid; | |
3922 | /* XXX: a lockowner always has exactly one stateid: */ | |
3923 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3924 | struct nfs4_ol_stateid, st_perstateowner); | |
3925 | return nfs_ok; | |
3926 | } | |
16bfdaaf | 3927 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
3928 | &lock->v.new.owner); |
3929 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
3930 | if (lo == NULL) | |
3931 | return nfserr_jukebox; | |
3932 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
3933 | if (*lst == NULL) { | |
3934 | release_lockowner(lo); | |
3935 | return nfserr_jukebox; | |
3936 | } | |
3937 | *new = true; | |
3938 | return nfs_ok; | |
3939 | } | |
3940 | ||
1da177e4 LT |
3941 | /* |
3942 | * LOCK operation | |
3943 | */ | |
b37ad28b | 3944 | __be32 |
ca364317 | 3945 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3946 | struct nfsd4_lock *lock) |
1da177e4 | 3947 | { |
fe0750e5 BF |
3948 | struct nfs4_openowner *open_sop = NULL; |
3949 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3950 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3951 | struct nfs4_file *fp; |
3952 | struct file *filp = NULL; | |
1da177e4 | 3953 | struct file_lock file_lock; |
8dc7c311 | 3954 | struct file_lock conflock; |
b37ad28b | 3955 | __be32 status = 0; |
64a284d0 | 3956 | bool new_state = false; |
b34f27aa | 3957 | int lkflg; |
b8dd7b9a | 3958 | int err; |
1da177e4 LT |
3959 | |
3960 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3961 | (long long) lock->lk_offset, | |
3962 | (long long) lock->lk_length); | |
3963 | ||
1da177e4 LT |
3964 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3965 | return nfserr_inval; | |
3966 | ||
ca364317 | 3967 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3968 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3969 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3970 | return status; | |
3971 | } | |
3972 | ||
1da177e4 LT |
3973 | nfs4_lock_state(); |
3974 | ||
3975 | if (lock->lk_is_new) { | |
893f8770 N |
3976 | /* |
3977 | * Client indicates that this is a new lockowner. | |
3978 | * Use open owner and open stateid to create lock owner and | |
3979 | * lock stateid. | |
3980 | */ | |
dcef0413 | 3981 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
3982 | |
3983 | if (nfsd4_has_session(cstate)) | |
3984 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
3985 | memcpy(&lock->v.new.clientid, | |
3986 | &cstate->session->se_client->cl_clientid, | |
3987 | sizeof(clientid_t)); | |
3988 | ||
1da177e4 | 3989 | status = nfserr_stale_clientid; |
684e5638 | 3990 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 3991 | goto out; |
1da177e4 | 3992 | |
1da177e4 | 3993 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3994 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3995 | lock->lk_new_open_seqid, |
3996 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3997 | &open_stp); |
37515177 | 3998 | if (status) |
1da177e4 | 3999 | goto out; |
fe0750e5 | 4000 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4001 | status = nfserr_bad_stateid; |
684e5638 | 4002 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4003 | &lock->v.new.clientid)) |
4004 | goto out; | |
64a284d0 BF |
4005 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4006 | &lock_stp, &new_state); | |
4007 | if (status) | |
1da177e4 | 4008 | goto out; |
1da177e4 LT |
4009 | } else { |
4010 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4011 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4012 | lock->lk_old_lock_seqid, |
4013 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4014 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4015 | if (status) |
4016 | goto out; | |
4017 | } | |
64a284d0 BF |
4018 | lock_sop = lockowner(lock_stp->st_stateowner); |
4019 | fp = lock_stp->st_file; | |
1da177e4 | 4020 | |
b34f27aa BF |
4021 | lkflg = setlkflg(lock->lk_type); |
4022 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4023 | if (status) | |
4024 | goto out; | |
4025 | ||
0dd395dc | 4026 | status = nfserr_grace; |
af558e33 | 4027 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4028 | goto out; |
4029 | status = nfserr_no_grace; | |
af558e33 | 4030 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4031 | goto out; |
4032 | ||
1da177e4 LT |
4033 | locks_init_lock(&file_lock); |
4034 | switch (lock->lk_type) { | |
4035 | case NFS4_READ_LT: | |
4036 | case NFS4_READW_LT: | |
0997b173 BF |
4037 | filp = find_readable_file(lock_stp->st_file); |
4038 | if (filp) | |
4039 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4040 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4041 | break; |
1da177e4 LT |
4042 | case NFS4_WRITE_LT: |
4043 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4044 | filp = find_writeable_file(lock_stp->st_file); |
4045 | if (filp) | |
4046 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4047 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4048 | break; |
1da177e4 LT |
4049 | default: |
4050 | status = nfserr_inval; | |
4051 | goto out; | |
4052 | } | |
f9d7562f BF |
4053 | if (!filp) { |
4054 | status = nfserr_openmode; | |
4055 | goto out; | |
4056 | } | |
b59e3c0e | 4057 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4058 | file_lock.fl_pid = current->tgid; |
4059 | file_lock.fl_file = filp; | |
4060 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4061 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4062 | |
4063 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4064 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4065 | nfs4_transform_lock_offset(&file_lock); |
4066 | ||
4067 | /* | |
4068 | * Try to lock the file in the VFS. | |
4069 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4070 | */ | |
4071 | ||
529d7b2a | 4072 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4073 | switch (-err) { |
1da177e4 | 4074 | case 0: /* success! */ |
dcef0413 BF |
4075 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4076 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4077 | sizeof(stateid_t)); |
b8dd7b9a | 4078 | status = 0; |
eb76b3fd AA |
4079 | break; |
4080 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4081 | status = nfserr_denied; | |
4082 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4083 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4084 | break; | |
1da177e4 LT |
4085 | case (EDEADLK): |
4086 | status = nfserr_deadlock; | |
eb76b3fd | 4087 | break; |
3e772463 | 4088 | default: |
fd85b817 | 4089 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4090 | status = nfserrno(err); |
eb76b3fd | 4091 | break; |
1da177e4 | 4092 | } |
1da177e4 | 4093 | out: |
64a284d0 | 4094 | if (status && new_state) |
f044ff83 | 4095 | release_lockowner(lock_sop); |
5ec094c1 BF |
4096 | if (!cstate->replay_owner) |
4097 | nfs4_unlock_state(); | |
1da177e4 LT |
4098 | return status; |
4099 | } | |
4100 | ||
55ef1274 BF |
4101 | /* |
4102 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4103 | * so we do a temporary open here just to get an open file to pass to | |
4104 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4105 | * inode operation.) | |
4106 | */ | |
4107 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4108 | { | |
4109 | struct file *file; | |
4110 | int err; | |
4111 | ||
4112 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4113 | if (err) | |
4114 | return err; | |
4115 | err = vfs_test_lock(file, lock); | |
4116 | nfsd_close(file); | |
4117 | return err; | |
4118 | } | |
4119 | ||
1da177e4 LT |
4120 | /* |
4121 | * LOCKT operation | |
4122 | */ | |
b37ad28b | 4123 | __be32 |
ca364317 BF |
4124 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4125 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4126 | { |
4127 | struct inode *inode; | |
1da177e4 | 4128 | struct file_lock file_lock; |
fe0750e5 | 4129 | struct nfs4_lockowner *lo; |
fd85b817 | 4130 | int error; |
b37ad28b | 4131 | __be32 status; |
1da177e4 | 4132 | |
af558e33 | 4133 | if (locks_in_grace()) |
1da177e4 LT |
4134 | return nfserr_grace; |
4135 | ||
4136 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4137 | return nfserr_inval; | |
4138 | ||
1da177e4 LT |
4139 | nfs4_lock_state(); |
4140 | ||
4141 | status = nfserr_stale_clientid; | |
60adfc50 | 4142 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4143 | goto out; |
1da177e4 | 4144 | |
75c096f7 | 4145 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4146 | goto out; |
1da177e4 | 4147 | |
ca364317 | 4148 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4149 | locks_init_lock(&file_lock); |
4150 | switch (lockt->lt_type) { | |
4151 | case NFS4_READ_LT: | |
4152 | case NFS4_READW_LT: | |
4153 | file_lock.fl_type = F_RDLCK; | |
4154 | break; | |
4155 | case NFS4_WRITE_LT: | |
4156 | case NFS4_WRITEW_LT: | |
4157 | file_lock.fl_type = F_WRLCK; | |
4158 | break; | |
4159 | default: | |
2fdada03 | 4160 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4161 | status = nfserr_inval; |
4162 | goto out; | |
4163 | } | |
4164 | ||
fe0750e5 BF |
4165 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4166 | if (lo) | |
4167 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4168 | file_lock.fl_pid = current->tgid; |
4169 | file_lock.fl_flags = FL_POSIX; | |
4170 | ||
4171 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4172 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4173 | |
4174 | nfs4_transform_lock_offset(&file_lock); | |
4175 | ||
1da177e4 | 4176 | status = nfs_ok; |
55ef1274 | 4177 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4178 | if (error) { |
4179 | status = nfserrno(error); | |
4180 | goto out; | |
4181 | } | |
9d6a8c5c | 4182 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4183 | status = nfserr_denied; |
9d6a8c5c | 4184 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4185 | } |
4186 | out: | |
4187 | nfs4_unlock_state(); | |
4188 | return status; | |
4189 | } | |
4190 | ||
b37ad28b | 4191 | __be32 |
ca364317 | 4192 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4193 | struct nfsd4_locku *locku) |
1da177e4 | 4194 | { |
dcef0413 | 4195 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4196 | struct file *filp = NULL; |
4197 | struct file_lock file_lock; | |
b37ad28b | 4198 | __be32 status; |
b8dd7b9a | 4199 | int err; |
1da177e4 LT |
4200 | |
4201 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4202 | (long long) locku->lu_offset, | |
4203 | (long long) locku->lu_length); | |
4204 | ||
4205 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4206 | return nfserr_inval; | |
4207 | ||
4208 | nfs4_lock_state(); | |
4209 | ||
9072d5c6 | 4210 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4211 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4212 | if (status) |
1da177e4 | 4213 | goto out; |
f9d7562f BF |
4214 | filp = find_any_file(stp->st_file); |
4215 | if (!filp) { | |
4216 | status = nfserr_lock_range; | |
4217 | goto out; | |
4218 | } | |
1da177e4 LT |
4219 | BUG_ON(!filp); |
4220 | locks_init_lock(&file_lock); | |
4221 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4222 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4223 | file_lock.fl_pid = current->tgid; |
4224 | file_lock.fl_file = filp; | |
4225 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4226 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4227 | file_lock.fl_start = locku->lu_offset; |
4228 | ||
87df4de8 | 4229 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4230 | nfs4_transform_lock_offset(&file_lock); |
4231 | ||
4232 | /* | |
4233 | * Try to unlock the file in the VFS. | |
4234 | */ | |
fd85b817 | 4235 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4236 | if (err) { |
fd85b817 | 4237 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4238 | goto out_nfserr; |
4239 | } | |
4240 | /* | |
4241 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4242 | */ | |
dcef0413 BF |
4243 | update_stateid(&stp->st_stid.sc_stateid); |
4244 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4245 | |
4246 | out: | |
71c3bcd7 BF |
4247 | if (!cstate->replay_owner) |
4248 | nfs4_unlock_state(); | |
1da177e4 LT |
4249 | return status; |
4250 | ||
4251 | out_nfserr: | |
b8dd7b9a | 4252 | status = nfserrno(err); |
1da177e4 LT |
4253 | goto out; |
4254 | } | |
4255 | ||
4256 | /* | |
4257 | * returns | |
4258 | * 1: locks held by lockowner | |
4259 | * 0: no locks held by lockowner | |
4260 | */ | |
4261 | static int | |
fe0750e5 | 4262 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4263 | { |
4264 | struct file_lock **flpp; | |
f9d7562f | 4265 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4266 | int status = 0; |
4267 | ||
b89f4321 | 4268 | lock_flocks(); |
1da177e4 | 4269 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4270 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4271 | status = 1; |
4272 | goto out; | |
796dadfd | 4273 | } |
1da177e4 LT |
4274 | } |
4275 | out: | |
b89f4321 | 4276 | unlock_flocks(); |
1da177e4 LT |
4277 | return status; |
4278 | } | |
4279 | ||
b37ad28b | 4280 | __be32 |
b591480b BF |
4281 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4282 | struct nfsd4_compound_state *cstate, | |
4283 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4284 | { |
4285 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4286 | struct nfs4_stateowner *sop; |
fe0750e5 | 4287 | struct nfs4_lockowner *lo; |
dcef0413 | 4288 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4289 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4290 | struct list_head matches; |
16bfdaaf | 4291 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4292 | __be32 status; |
1da177e4 LT |
4293 | |
4294 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4295 | clid->cl_boot, clid->cl_id); | |
4296 | ||
4297 | /* XXX check for lease expiration */ | |
4298 | ||
4299 | status = nfserr_stale_clientid; | |
849823c5 | 4300 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4301 | return status; |
1da177e4 LT |
4302 | |
4303 | nfs4_lock_state(); | |
4304 | ||
3e9e3dbe | 4305 | status = nfserr_locks_held; |
3e9e3dbe | 4306 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4307 | |
16bfdaaf BF |
4308 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4309 | if (sop->so_is_open_owner) | |
4310 | continue; | |
06f1f864 BF |
4311 | if (!same_owner_str(sop, owner, clid)) |
4312 | continue; | |
4313 | list_for_each_entry(stp, &sop->so_stateids, | |
4314 | st_perstateowner) { | |
4315 | lo = lockowner(sop); | |
4316 | if (check_for_locks(stp->st_file, lo)) | |
4317 | goto out; | |
4318 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4319 | } |
3e9e3dbe N |
4320 | } |
4321 | /* Clients probably won't expect us to return with some (but not all) | |
4322 | * of the lockowner state released; so don't release any until all | |
4323 | * have been checked. */ | |
4324 | status = nfs_ok; | |
0fa822e4 | 4325 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4326 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4327 | lo_list); | |
0fa822e4 N |
4328 | /* unhash_stateowner deletes so_perclient only |
4329 | * for openowners. */ | |
fe0750e5 BF |
4330 | list_del(&lo->lo_list); |
4331 | release_lockowner(lo); | |
1da177e4 LT |
4332 | } |
4333 | out: | |
4334 | nfs4_unlock_state(); | |
4335 | return status; | |
4336 | } | |
4337 | ||
4338 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4339 | alloc_reclaim(void) |
1da177e4 | 4340 | { |
a55370a3 | 4341 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4342 | } |
4343 | ||
c7b9a459 | 4344 | int |
a1bcecd2 | 4345 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4346 | { |
4347 | unsigned int strhashval = clientstr_hashval(name); | |
4348 | struct nfs4_client *clp; | |
4349 | ||
e203d506 | 4350 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4351 | return clp ? 1 : 0; |
4352 | } | |
4353 | ||
1da177e4 LT |
4354 | /* |
4355 | * failure => all reset bets are off, nfserr_no_grace... | |
4356 | */ | |
190e4fbf N |
4357 | int |
4358 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4359 | { |
4360 | unsigned int strhashval; | |
4361 | struct nfs4_client_reclaim *crp = NULL; | |
4362 | ||
a55370a3 N |
4363 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4364 | crp = alloc_reclaim(); | |
1da177e4 LT |
4365 | if (!crp) |
4366 | return 0; | |
a55370a3 | 4367 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4368 | INIT_LIST_HEAD(&crp->cr_strhash); |
4369 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4370 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4371 | reclaim_str_hashtbl_size++; |
4372 | return 1; | |
4373 | } | |
4374 | ||
4375 | static void | |
4376 | nfs4_release_reclaim(void) | |
4377 | { | |
4378 | struct nfs4_client_reclaim *crp = NULL; | |
4379 | int i; | |
4380 | ||
1da177e4 LT |
4381 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4382 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4383 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4384 | struct nfs4_client_reclaim, cr_strhash); | |
4385 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4386 | kfree(crp); |
4387 | reclaim_str_hashtbl_size--; | |
4388 | } | |
4389 | } | |
4390 | BUG_ON(reclaim_str_hashtbl_size); | |
4391 | } | |
4392 | ||
4393 | /* | |
4394 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4395 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4396 | nfs4_find_reclaim_client(clientid_t *clid) |
4397 | { | |
4398 | unsigned int strhashval; | |
4399 | struct nfs4_client *clp; | |
4400 | struct nfs4_client_reclaim *crp = NULL; | |
4401 | ||
4402 | ||
4403 | /* find clientid in conf_id_hashtbl */ | |
4404 | clp = find_confirmed_client(clid); | |
4405 | if (clp == NULL) | |
4406 | return NULL; | |
4407 | ||
a55370a3 N |
4408 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4409 | clp->cl_name.len, clp->cl_name.data, | |
4410 | clp->cl_recdir); | |
1da177e4 LT |
4411 | |
4412 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4413 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4414 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4415 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4416 | return crp; |
4417 | } | |
4418 | } | |
4419 | return NULL; | |
4420 | } | |
4421 | ||
4422 | /* | |
4423 | * Called from OPEN. Look for clientid in reclaim list. | |
4424 | */ | |
b37ad28b | 4425 | __be32 |
1da177e4 LT |
4426 | nfs4_check_open_reclaim(clientid_t *clid) |
4427 | { | |
dfc83565 | 4428 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4429 | } |
4430 | ||
65178db4 BS |
4431 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4432 | ||
4433 | void nfsd_forget_clients(u64 num) | |
4434 | { | |
4435 | struct nfs4_client *clp, *next; | |
4436 | int count = 0; | |
4437 | ||
4438 | nfs4_lock_state(); | |
4439 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
4440 | nfsd4_remove_clid_dir(clp); | |
4441 | expire_client(clp); | |
4442 | if (++count == num) | |
4443 | break; | |
4444 | } | |
4445 | nfs4_unlock_state(); | |
4446 | ||
4447 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4448 | } | |
4449 | ||
4450 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4451 | { | |
4452 | release_lockowner(lockowner(sop)); | |
4453 | } | |
4454 | ||
4455 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4456 | { | |
4457 | release_openowner(openowner(sop)); | |
4458 | } | |
4459 | ||
353de31b | 4460 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4461 | void (*release_sop)(struct nfs4_stateowner *)) |
4462 | { | |
4463 | int i, count = 0; | |
4464 | struct nfs4_stateowner *sop, *next; | |
4465 | ||
16bfdaaf BF |
4466 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4467 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4468 | if (sop->so_is_open_owner != is_open_owner) | |
4469 | continue; | |
65178db4 BS |
4470 | release_sop(sop); |
4471 | if (++count == num) | |
4472 | return count; | |
4473 | } | |
4474 | } | |
4475 | return count; | |
4476 | } | |
4477 | ||
4478 | void nfsd_forget_locks(u64 num) | |
4479 | { | |
4480 | int count; | |
4481 | ||
4482 | nfs4_lock_state(); | |
16bfdaaf | 4483 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4484 | nfs4_unlock_state(); |
4485 | ||
4486 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4487 | } | |
4488 | ||
4489 | void nfsd_forget_openowners(u64 num) | |
4490 | { | |
4491 | int count; | |
4492 | ||
4493 | nfs4_lock_state(); | |
16bfdaaf | 4494 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4495 | nfs4_unlock_state(); |
4496 | ||
4497 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4498 | } | |
4499 | ||
4500 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4501 | { | |
4502 | int i, count = 0; | |
4503 | struct nfs4_file *fp; | |
4504 | struct nfs4_delegation *dp, *next; | |
4505 | ||
4506 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
4507 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
4508 | list_for_each_entry_safe(dp, next, &fp->fi_delegations, dl_perfile) { | |
4509 | deleg_func(dp); | |
4510 | if (++count == num) | |
4511 | return count; | |
4512 | } | |
4513 | } | |
4514 | } | |
4515 | return count; | |
4516 | } | |
4517 | ||
4518 | void nfsd_forget_delegations(u64 num) | |
4519 | { | |
4520 | unsigned int count; | |
4521 | ||
4522 | nfs4_lock_state(); | |
4523 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4524 | nfs4_unlock_state(); | |
4525 | ||
4526 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4527 | } | |
4528 | ||
4529 | void nfsd_recall_delegations(u64 num) | |
4530 | { | |
4531 | unsigned int count; | |
4532 | ||
4533 | nfs4_lock_state(); | |
4534 | spin_lock(&recall_lock); | |
4535 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4536 | spin_unlock(&recall_lock); | |
4537 | nfs4_unlock_state(); | |
4538 | ||
4539 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4540 | } | |
4541 | ||
4542 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4543 | ||
ac4d8ff2 | 4544 | /* initialization to perform at module load time: */ |
1da177e4 | 4545 | |
72083396 | 4546 | void |
ac4d8ff2 | 4547 | nfs4_state_init(void) |
1da177e4 | 4548 | { |
72083396 | 4549 | int i; |
1da177e4 | 4550 | |
1da177e4 LT |
4551 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4552 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4553 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4554 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4555 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4556 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4557 | } |
5282fd72 ME |
4558 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4559 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4560 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4561 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4562 | } | |
16bfdaaf BF |
4563 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4564 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4565 | } |
009673b4 BF |
4566 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4567 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 | 4568 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4569 | INIT_LIST_HEAD(&close_lru); |
4570 | INIT_LIST_HEAD(&client_lru); | |
4571 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4572 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4573 | } |
4574 | ||
190e4fbf N |
4575 | static void |
4576 | nfsd4_load_reboot_recovery_data(void) | |
4577 | { | |
4578 | int status; | |
4579 | ||
0964a3d3 | 4580 | nfs4_lock_state(); |
48483bf2 | 4581 | nfsd4_init_recdir(); |
190e4fbf | 4582 | status = nfsd4_recdir_load(); |
0964a3d3 | 4583 | nfs4_unlock_state(); |
190e4fbf N |
4584 | if (status) |
4585 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4586 | } | |
4587 | ||
c2f1a551 MS |
4588 | /* |
4589 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4590 | * client may quite reasonably hang on to a delegation as long as it has | |
4591 | * the inode cached. This becomes an obvious problem the first time a | |
4592 | * client's inode cache approaches the size of the server's total memory. | |
4593 | * | |
4594 | * For now we avoid this problem by imposing a hard limit on the number | |
4595 | * of delegations, which varies according to the server's memory size. | |
4596 | */ | |
4597 | static void | |
4598 | set_max_delegations(void) | |
4599 | { | |
4600 | /* | |
4601 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4602 | * estimates suggest that in the worst case (where every delegation | |
4603 | * is for a different inode), a delegation could take about 1.5K, | |
4604 | * giving a worst case usage of about 6% of memory. | |
4605 | */ | |
4606 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4607 | } | |
4608 | ||
ac4d8ff2 N |
4609 | /* initialization to perform when the nfsd service is started: */ |
4610 | ||
29ab23cc | 4611 | static int |
ac4d8ff2 N |
4612 | __nfs4_state_start(void) |
4613 | { | |
b5a1a81e BF |
4614 | int ret; |
4615 | ||
1da177e4 | 4616 | boot_time = get_seconds(); |
af558e33 | 4617 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4618 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4619 | nfsd4_grace); |
b5a1a81e BF |
4620 | ret = set_callback_cred(); |
4621 | if (ret) | |
4622 | return -ENOMEM; | |
58da282b | 4623 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4624 | if (laundry_wq == NULL) |
4625 | return -ENOMEM; | |
b5a1a81e BF |
4626 | ret = nfsd4_create_callback_queue(); |
4627 | if (ret) | |
4628 | goto out_free_laundry; | |
e46b498c | 4629 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4630 | set_max_delegations(); |
b5a1a81e BF |
4631 | return 0; |
4632 | out_free_laundry: | |
4633 | destroy_workqueue(laundry_wq); | |
4634 | return ret; | |
1da177e4 LT |
4635 | } |
4636 | ||
29ab23cc | 4637 | int |
76a3550e | 4638 | nfs4_state_start(void) |
1da177e4 | 4639 | { |
190e4fbf | 4640 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4641 | return __nfs4_state_start(); |
1da177e4 LT |
4642 | } |
4643 | ||
1da177e4 LT |
4644 | static void |
4645 | __nfs4_state_shutdown(void) | |
4646 | { | |
4647 | int i; | |
4648 | struct nfs4_client *clp = NULL; | |
4649 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4650 | struct list_head *pos, *next, reaplist; |
4651 | ||
1da177e4 LT |
4652 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4653 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4654 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4655 | expire_client(clp); | |
4656 | } | |
4657 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4658 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4659 | expire_client(clp); | |
4660 | } | |
4661 | } | |
4662 | INIT_LIST_HEAD(&reaplist); | |
4663 | spin_lock(&recall_lock); | |
4664 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4665 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4666 | list_move(&dp->dl_recall_lru, &reaplist); | |
4667 | } | |
4668 | spin_unlock(&recall_lock); | |
4669 | list_for_each_safe(pos, next, &reaplist) { | |
4670 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4671 | list_del_init(&dp->dl_recall_lru); | |
4672 | unhash_delegation(dp); | |
4673 | } | |
4674 | ||
190e4fbf | 4675 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4676 | } |
4677 | ||
4678 | void | |
4679 | nfs4_state_shutdown(void) | |
4680 | { | |
afe2c511 | 4681 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4682 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4683 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4684 | nfs4_lock_state(); |
4685 | nfs4_release_reclaim(); | |
4686 | __nfs4_state_shutdown(); | |
1da177e4 | 4687 | nfs4_unlock_state(); |
c3935e30 | 4688 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4689 | } |