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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; |
f32f3c2d BF |
52 | |
53 | #define all_ones {{~0,~0},~0} | |
54 | static const stateid_t one_stateid = { | |
55 | .si_generation = ~0, | |
56 | .si_opaque = all_ones, | |
57 | }; | |
58 | static const stateid_t zero_stateid = { | |
59 | /* all fields zero */ | |
60 | }; | |
19ff0f28 TM |
61 | static const stateid_t currentstateid = { |
62 | .si_generation = 1, | |
63 | }; | |
f32f3c2d | 64 | |
ec6b5d7b | 65 | static u64 current_sessionid = 1; |
fd39ca9a | 66 | |
f32f3c2d BF |
67 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
68 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 69 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 70 | |
1da177e4 | 71 | /* forward declarations */ |
fe0750e5 | 72 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* Locking: */ |
75 | ||
76 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 77 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 78 | |
8b671b80 BF |
79 | /* |
80 | * Currently used for the del_recall_lru and file hash table. In an | |
81 | * effort to decrease the scope of the client_mutex, this spinlock may | |
82 | * eventually cover more: | |
83 | */ | |
84 | static DEFINE_SPINLOCK(recall_lock); | |
85 | ||
fe0750e5 BF |
86 | static struct kmem_cache *openowner_slab = NULL; |
87 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
88 | static struct kmem_cache *file_slab = NULL; |
89 | static struct kmem_cache *stateid_slab = NULL; | |
90 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 91 | |
1da177e4 LT |
92 | void |
93 | nfs4_lock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_lock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | void | |
99 | nfs4_unlock_state(void) | |
100 | { | |
353ab6e9 | 101 | mutex_unlock(&client_mutex); |
1da177e4 LT |
102 | } |
103 | ||
104 | static inline u32 | |
105 | opaque_hashval(const void *ptr, int nbytes) | |
106 | { | |
107 | unsigned char *cptr = (unsigned char *) ptr; | |
108 | ||
109 | u32 x = 0; | |
110 | while (nbytes--) { | |
111 | x *= 37; | |
112 | x += *cptr++; | |
113 | } | |
114 | return x; | |
115 | } | |
116 | ||
1da177e4 LT |
117 | static struct list_head del_recall_lru; |
118 | ||
32513b40 BF |
119 | static void nfsd4_free_file(struct nfs4_file *f) |
120 | { | |
121 | kmem_cache_free(file_slab, f); | |
122 | } | |
123 | ||
13cd2184 N |
124 | static inline void |
125 | put_nfs4_file(struct nfs4_file *fi) | |
126 | { | |
8b671b80 BF |
127 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
128 | list_del(&fi->fi_hash); | |
129 | spin_unlock(&recall_lock); | |
130 | iput(fi->fi_inode); | |
32513b40 | 131 | nfsd4_free_file(fi); |
8b671b80 | 132 | } |
13cd2184 N |
133 | } |
134 | ||
135 | static inline void | |
136 | get_nfs4_file(struct nfs4_file *fi) | |
137 | { | |
8b671b80 | 138 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
139 | } |
140 | ||
ef0f3390 | 141 | static int num_delegations; |
c2f1a551 | 142 | unsigned int max_delegations; |
ef0f3390 N |
143 | |
144 | /* | |
145 | * Open owner state (share locks) | |
146 | */ | |
147 | ||
16bfdaaf BF |
148 | /* hash tables for lock and open owners */ |
149 | #define OWNER_HASH_BITS 8 | |
150 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
151 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 152 | |
16bfdaaf | 153 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
154 | { |
155 | unsigned int ret; | |
156 | ||
157 | ret = opaque_hashval(ownername->data, ownername->len); | |
158 | ret += clientid; | |
16bfdaaf | 159 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 160 | } |
ef0f3390 | 161 | |
16bfdaaf | 162 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
163 | |
164 | /* hash table for nfs4_file */ | |
165 | #define FILE_HASH_BITS 8 | |
166 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 167 | |
ddc04c41 BF |
168 | static unsigned int file_hashval(struct inode *ino) |
169 | { | |
170 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
171 | return hash_ptr(ino, FILE_HASH_BITS); | |
172 | } | |
173 | ||
ef0f3390 | 174 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 175 | |
998db52c | 176 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
177 | { |
178 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
179 | atomic_inc(&fp->fi_access[oflag]); | |
180 | } | |
181 | ||
998db52c BF |
182 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
183 | { | |
184 | if (oflag == O_RDWR) { | |
185 | __nfs4_file_get_access(fp, O_RDONLY); | |
186 | __nfs4_file_get_access(fp, O_WRONLY); | |
187 | } else | |
188 | __nfs4_file_get_access(fp, oflag); | |
189 | } | |
190 | ||
191 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
192 | { |
193 | if (fp->fi_fds[oflag]) { | |
194 | fput(fp->fi_fds[oflag]); | |
195 | fp->fi_fds[oflag] = NULL; | |
196 | } | |
197 | } | |
198 | ||
998db52c | 199 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
200 | { |
201 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 202 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
203 | /* |
204 | * It's also safe to get rid of the RDWR open *if* | |
205 | * we no longer have need of the other kind of access | |
206 | * or if we already have the other kind of open: | |
207 | */ | |
208 | if (fp->fi_fds[1-oflag] | |
209 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
210 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
211 | } |
212 | } | |
213 | ||
998db52c BF |
214 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
215 | { | |
216 | if (oflag == O_RDWR) { | |
217 | __nfs4_file_put_access(fp, O_RDONLY); | |
218 | __nfs4_file_put_access(fp, O_WRONLY); | |
219 | } else | |
220 | __nfs4_file_put_access(fp, oflag); | |
221 | } | |
222 | ||
6136d2b4 | 223 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 224 | { |
6136d2b4 | 225 | static int min_stateid = 0; |
38c2f4b1 | 226 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
227 | int new_stid; |
228 | int error; | |
229 | ||
38c2f4b1 | 230 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 231 | /* |
996e0938 BF |
232 | * Note: the necessary preallocation was done in |
233 | * nfs4_alloc_stateid(). The idr code caps the number of | |
234 | * preallocations that can exist at a time, but the state lock | |
235 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
236 | */ |
237 | BUG_ON(error); | |
238 | /* | |
239 | * It shouldn't be a problem to reuse an opaque stateid value. | |
240 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
241 | * example, a stray write retransmission could be accepted by | |
242 | * the server when it should have been rejected. Therefore, | |
243 | * adopt a trick from the sctp code to attempt to maximize the | |
244 | * amount of time until an id is reused, by ensuring they always | |
245 | * "increase" (mod INT_MAX): | |
246 | */ | |
36d44c60 | 247 | |
6136d2b4 BF |
248 | min_stateid = new_stid+1; |
249 | if (min_stateid == INT_MAX) | |
250 | min_stateid = 0; | |
251 | return new_stid; | |
36d44c60 BF |
252 | } |
253 | ||
996e0938 | 254 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
255 | { |
256 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 257 | int new_id; |
2a74aba7 BF |
258 | |
259 | stid->sc_type = type; | |
260 | stid->sc_client = cl; | |
261 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 262 | new_id = get_new_stid(stid); |
6136d2b4 | 263 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
264 | /* Will be incremented before return to client: */ |
265 | s->si_generation = 0; | |
996e0938 BF |
266 | } |
267 | ||
268 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
269 | { | |
270 | struct idr *stateids = &cl->cl_stateids; | |
271 | ||
272 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
273 | return NULL; | |
274 | /* | |
275 | * Note: if we fail here (or any time between now and the time | |
276 | * we actually get the new idr), we won't need to undo the idr | |
277 | * preallocation, since the idr code caps the number of | |
278 | * preallocated entries. | |
279 | */ | |
280 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
281 | } |
282 | ||
4cdc951b BF |
283 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
284 | { | |
285 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
286 | } | |
287 | ||
1da177e4 | 288 | static struct nfs4_delegation * |
dcef0413 | 289 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
290 | { |
291 | struct nfs4_delegation *dp; | |
292 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
293 | |
294 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
295 | /* |
296 | * Major work on the lease subsystem (for example, to support | |
297 | * calbacks on stat) will be required before we can support | |
298 | * write delegations properly. | |
299 | */ | |
300 | if (type != NFS4_OPEN_DELEGATE_READ) | |
301 | return NULL; | |
47f9940c MS |
302 | if (fp->fi_had_conflict) |
303 | return NULL; | |
c2f1a551 | 304 | if (num_delegations > max_delegations) |
ef0f3390 | 305 | return NULL; |
996e0938 | 306 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 307 | if (dp == NULL) |
1da177e4 | 308 | return dp; |
996e0938 | 309 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
310 | /* |
311 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
312 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
313 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
314 | */ |
315 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 316 | num_delegations++; |
ea1da636 N |
317 | INIT_LIST_HEAD(&dp->dl_perfile); |
318 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 319 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 320 | get_nfs4_file(fp); |
1da177e4 | 321 | dp->dl_file = fp; |
1da177e4 | 322 | dp->dl_type = type; |
6c02eaa1 | 323 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
324 | dp->dl_time = 0; |
325 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 326 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
327 | return dp; |
328 | } | |
329 | ||
330 | void | |
331 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
332 | { | |
333 | if (atomic_dec_and_test(&dp->dl_count)) { | |
334 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 335 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 336 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 337 | num_delegations--; |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
acfdf5c3 | 341 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 342 | { |
acfdf5c3 BF |
343 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
344 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
345 | fp->fi_lease = NULL; | |
4ee63624 | 346 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
347 | fp->fi_deleg_file = NULL; |
348 | } | |
1da177e4 LT |
349 | } |
350 | ||
6136d2b4 BF |
351 | static void unhash_stid(struct nfs4_stid *s) |
352 | { | |
38c2f4b1 BF |
353 | struct idr *stateids = &s->sc_client->cl_stateids; |
354 | ||
355 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
356 | } |
357 | ||
1da177e4 LT |
358 | /* Called under the state lock. */ |
359 | static void | |
360 | unhash_delegation(struct nfs4_delegation *dp) | |
361 | { | |
6136d2b4 | 362 | unhash_stid(&dp->dl_stid); |
ea1da636 | 363 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 364 | spin_lock(&recall_lock); |
5d926e8c | 365 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
366 | list_del_init(&dp->dl_recall_lru); |
367 | spin_unlock(&recall_lock); | |
acfdf5c3 | 368 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
369 | nfs4_put_delegation(dp); |
370 | } | |
371 | ||
372 | /* | |
373 | * SETCLIENTID state | |
374 | */ | |
375 | ||
36acb66b | 376 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
377 | static DEFINE_SPINLOCK(client_lock); |
378 | ||
1da177e4 LT |
379 | /* Hash tables for nfs4_clientid state */ |
380 | #define CLIENT_HASH_BITS 4 | |
381 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
382 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
383 | ||
ddc04c41 BF |
384 | static unsigned int clientid_hashval(u32 id) |
385 | { | |
386 | return id & CLIENT_HASH_MASK; | |
387 | } | |
388 | ||
389 | static unsigned int clientstr_hashval(const char *name) | |
390 | { | |
391 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
392 | } | |
393 | ||
1da177e4 LT |
394 | /* |
395 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
396 | * used in reboot/reset lease grace period processing | |
397 | * | |
398 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
399 | * setclientid_confirmed info. | |
400 | * | |
401 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
402 | * setclientid info. | |
403 | * | |
404 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
405 | * for lease renewal. | |
406 | * | |
407 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
408 | * for last close replay. | |
409 | */ | |
410 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
411 | static int reclaim_str_hashtbl_size = 0; | |
412 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
413 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
414 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
415 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
416 | static struct list_head client_lru; | |
417 | static struct list_head close_lru; | |
418 | ||
f9d7562f BF |
419 | /* |
420 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
421 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
422 | * only what share bits are currently in force, but also what | |
423 | * combinations of share bits previous opens have used. This allows us | |
424 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
425 | * return an error if the client attempt to downgrade to a combination | |
426 | * of share bits not explicable by closing some of its previous opens. | |
427 | * | |
428 | * XXX: This enforcement is actually incomplete, since we don't keep | |
429 | * track of access/deny bit combinations; so, e.g., we allow: | |
430 | * | |
431 | * OPEN allow read, deny write | |
432 | * OPEN allow both, deny none | |
433 | * DOWNGRADE allow read, deny none | |
434 | * | |
435 | * which we should reject. | |
436 | */ | |
437 | static void | |
438 | set_access(unsigned int *access, unsigned long bmap) { | |
439 | int i; | |
440 | ||
441 | *access = 0; | |
442 | for (i = 1; i < 4; i++) { | |
443 | if (test_bit(i, &bmap)) | |
444 | *access |= i; | |
445 | } | |
446 | } | |
447 | ||
448 | static void | |
449 | set_deny(unsigned int *deny, unsigned long bmap) { | |
450 | int i; | |
451 | ||
452 | *deny = 0; | |
453 | for (i = 0; i < 4; i++) { | |
454 | if (test_bit(i, &bmap)) | |
455 | *deny |= i ; | |
456 | } | |
457 | } | |
458 | ||
459 | static int | |
dcef0413 | 460 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
461 | unsigned int access, deny; |
462 | ||
463 | set_access(&access, stp->st_access_bmap); | |
464 | set_deny(&deny, stp->st_deny_bmap); | |
465 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
466 | return 0; | |
467 | return 1; | |
468 | } | |
469 | ||
470 | static int nfs4_access_to_omode(u32 access) | |
471 | { | |
8f34a430 | 472 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
473 | case NFS4_SHARE_ACCESS_READ: |
474 | return O_RDONLY; | |
475 | case NFS4_SHARE_ACCESS_WRITE: | |
476 | return O_WRONLY; | |
477 | case NFS4_SHARE_ACCESS_BOTH: | |
478 | return O_RDWR; | |
479 | } | |
480 | BUG(); | |
481 | } | |
482 | ||
dcef0413 | 483 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 484 | { |
529d7b2a BF |
485 | list_del(&stp->st_perfile); |
486 | list_del(&stp->st_perstateowner); | |
487 | } | |
488 | ||
dcef0413 | 489 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 490 | { |
499f3edc | 491 | int i; |
0997b173 | 492 | |
23fcf2ec | 493 | if (stp->st_access_bmap) { |
499f3edc BF |
494 | for (i = 1; i < 4; i++) { |
495 | if (test_bit(i, &stp->st_access_bmap)) | |
496 | nfs4_file_put_access(stp->st_file, | |
497 | nfs4_access_to_omode(i)); | |
4665e2ba | 498 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 499 | } |
23fcf2ec | 500 | } |
a96e5b90 | 501 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
502 | stp->st_file = NULL; |
503 | } | |
504 | ||
dcef0413 | 505 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 506 | { |
529d7b2a BF |
507 | kmem_cache_free(stateid_slab, stp); |
508 | } | |
509 | ||
dcef0413 | 510 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
511 | { |
512 | struct file *file; | |
513 | ||
514 | unhash_generic_stateid(stp); | |
6136d2b4 | 515 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
516 | file = find_any_file(stp->st_file); |
517 | if (file) | |
fe0750e5 | 518 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 519 | close_generic_stateid(stp); |
529d7b2a BF |
520 | free_generic_stateid(stp); |
521 | } | |
522 | ||
fe0750e5 | 523 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 524 | { |
dcef0413 | 525 | struct nfs4_ol_stateid *stp; |
529d7b2a | 526 | |
fe0750e5 BF |
527 | list_del(&lo->lo_owner.so_strhash); |
528 | list_del(&lo->lo_perstateid); | |
009673b4 | 529 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
530 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
531 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 532 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
533 | release_lock_stateid(stp); |
534 | } | |
535 | } | |
536 | ||
fe0750e5 | 537 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 538 | { |
fe0750e5 BF |
539 | unhash_lockowner(lo); |
540 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
541 | } |
542 | ||
543 | static void | |
dcef0413 | 544 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 545 | { |
fe0750e5 | 546 | struct nfs4_lockowner *lo; |
529d7b2a BF |
547 | |
548 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
549 | lo = list_entry(open_stp->st_lockowners.next, |
550 | struct nfs4_lockowner, lo_perstateid); | |
551 | release_lockowner(lo); | |
529d7b2a BF |
552 | } |
553 | } | |
554 | ||
38c387b5 | 555 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
556 | { |
557 | unhash_generic_stateid(stp); | |
558 | release_stateid_lockowners(stp); | |
38c387b5 BF |
559 | close_generic_stateid(stp); |
560 | } | |
561 | ||
562 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
563 | { | |
564 | unhash_open_stateid(stp); | |
6136d2b4 | 565 | unhash_stid(&stp->st_stid); |
2283963f BF |
566 | free_generic_stateid(stp); |
567 | } | |
568 | ||
fe0750e5 | 569 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 570 | { |
dcef0413 | 571 | struct nfs4_ol_stateid *stp; |
f1d110ca | 572 | |
fe0750e5 BF |
573 | list_del(&oo->oo_owner.so_strhash); |
574 | list_del(&oo->oo_perclient); | |
575 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
576 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 577 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 578 | release_open_stateid(stp); |
f1d110ca BF |
579 | } |
580 | } | |
581 | ||
f7a4d872 BF |
582 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
583 | { | |
584 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
585 | ||
586 | if (s) { | |
6136d2b4 | 587 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
588 | free_generic_stateid(s); |
589 | oo->oo_last_closed_stid = NULL; | |
590 | } | |
591 | } | |
592 | ||
fe0750e5 | 593 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 594 | { |
fe0750e5 BF |
595 | unhash_openowner(oo); |
596 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 597 | release_last_closed_stateid(oo); |
fe0750e5 | 598 | nfs4_free_openowner(oo); |
f1d110ca BF |
599 | } |
600 | ||
5282fd72 ME |
601 | #define SESSION_HASH_SIZE 512 |
602 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
603 | ||
604 | static inline int | |
605 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
606 | { | |
607 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
608 | ||
609 | return sid->sequence % SESSION_HASH_SIZE; | |
610 | } | |
611 | ||
612 | static inline void | |
613 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
614 | { | |
615 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
616 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
617 | } | |
618 | ||
ec6b5d7b AA |
619 | static void |
620 | gen_sessionid(struct nfsd4_session *ses) | |
621 | { | |
622 | struct nfs4_client *clp = ses->se_client; | |
623 | struct nfsd4_sessionid *sid; | |
624 | ||
625 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
626 | sid->clientid = clp->cl_clientid; | |
627 | sid->sequence = current_sessionid++; | |
628 | sid->reserved = 0; | |
629 | } | |
630 | ||
631 | /* | |
a649637c AA |
632 | * The protocol defines ca_maxresponssize_cached to include the size of |
633 | * the rpc header, but all we need to cache is the data starting after | |
634 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
635 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
636 | * value that is the number of bytes in our cache plus a few additional | |
637 | * bytes. In order to stay on the safe side, and not promise more than | |
638 | * we can cache, those additional bytes must be the minimum possible: 24 | |
639 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
640 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
641 | * for the SEQUENCE op response: | |
642 | */ | |
643 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
644 | ||
557ce264 AA |
645 | static void |
646 | free_session_slots(struct nfsd4_session *ses) | |
647 | { | |
648 | int i; | |
649 | ||
650 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
651 | kfree(ses->se_slots[i]); | |
652 | } | |
653 | ||
a649637c | 654 | /* |
efe0cb6d BF |
655 | * We don't actually need to cache the rpc and session headers, so we |
656 | * can allocate a little less for each slot: | |
657 | */ | |
658 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
659 | { | |
660 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
661 | } | |
662 | ||
5b6feee9 | 663 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 664 | { |
5b6feee9 BF |
665 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
666 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 667 | |
5b6feee9 BF |
668 | return size; |
669 | } | |
ec6b5d7b | 670 | |
5b6feee9 BF |
671 | /* |
672 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 673 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 674 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 675 | */ |
5b6feee9 | 676 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 677 | { |
5b6feee9 | 678 | int avail; |
ec6b5d7b | 679 | |
5b6feee9 | 680 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 681 | |
5b6feee9 BF |
682 | spin_lock(&nfsd_drc_lock); |
683 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
684 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
685 | num = min_t(int, num, avail / slotsize); | |
686 | nfsd_drc_mem_used += num * slotsize; | |
687 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 688 | |
5b6feee9 BF |
689 | return num; |
690 | } | |
ec6b5d7b | 691 | |
5b6feee9 BF |
692 | static void nfsd4_put_drc_mem(int slotsize, int num) |
693 | { | |
4bd9b0f4 | 694 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 695 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 696 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 697 | } |
ec6b5d7b | 698 | |
5b6feee9 BF |
699 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
700 | { | |
701 | struct nfsd4_session *new; | |
702 | int mem, i; | |
a649637c | 703 | |
5b6feee9 BF |
704 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
705 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
706 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 707 | |
5b6feee9 BF |
708 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
709 | if (!new) | |
710 | return NULL; | |
557ce264 | 711 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
712 | for (i = 0; i < numslots; i++) { |
713 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
714 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
715 | if (!new->se_slots[i]) | |
557ce264 | 716 | goto out_free; |
557ce264 | 717 | } |
5b6feee9 BF |
718 | return new; |
719 | out_free: | |
720 | while (i--) | |
721 | kfree(new->se_slots[i]); | |
722 | kfree(new); | |
723 | return NULL; | |
ec6b5d7b AA |
724 | } |
725 | ||
5b6feee9 | 726 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 727 | { |
5b6feee9 | 728 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 729 | |
5b6feee9 | 730 | new->maxreqs = numslots; |
d2b21743 MJ |
731 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
732 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
733 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
734 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
735 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
736 | } | |
ec6b5d7b | 737 | |
19cf5c02 BF |
738 | static void free_conn(struct nfsd4_conn *c) |
739 | { | |
740 | svc_xprt_put(c->cn_xprt); | |
741 | kfree(c); | |
742 | } | |
ec6b5d7b | 743 | |
19cf5c02 BF |
744 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
745 | { | |
746 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
747 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 748 | |
19cf5c02 BF |
749 | spin_lock(&clp->cl_lock); |
750 | if (!list_empty(&c->cn_persession)) { | |
751 | list_del(&c->cn_persession); | |
752 | free_conn(c); | |
753 | } | |
754 | spin_unlock(&clp->cl_lock); | |
eea49806 | 755 | nfsd4_probe_callback(clp); |
19cf5c02 | 756 | } |
ec6b5d7b | 757 | |
d29c374c | 758 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 759 | { |
c7662518 | 760 | struct nfsd4_conn *conn; |
ec6b5d7b | 761 | |
c7662518 BF |
762 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
763 | if (!conn) | |
db90681d | 764 | return NULL; |
c7662518 BF |
765 | svc_xprt_get(rqstp->rq_xprt); |
766 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 767 | conn->cn_flags = flags; |
db90681d BF |
768 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
769 | return conn; | |
770 | } | |
a649637c | 771 | |
328ead28 BF |
772 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
773 | { | |
774 | conn->cn_session = ses; | |
775 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
776 | } |
777 | ||
db90681d | 778 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 779 | { |
db90681d | 780 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 781 | |
c7662518 | 782 | spin_lock(&clp->cl_lock); |
328ead28 | 783 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 784 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
785 | } |
786 | ||
21b75b01 | 787 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 788 | { |
19cf5c02 | 789 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 790 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
791 | } |
792 | ||
1d1bc8f2 | 793 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 794 | { |
db90681d | 795 | struct nfsd4_conn *conn; |
21b75b01 | 796 | int ret; |
ec6b5d7b | 797 | |
1d1bc8f2 | 798 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
799 | if (!conn) |
800 | return nfserr_jukebox; | |
801 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
802 | ret = nfsd4_register_conn(conn); |
803 | if (ret) | |
804 | /* oops; xprt is already down: */ | |
805 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
806 | return nfs_ok; |
807 | } | |
ec6b5d7b | 808 | |
1d1bc8f2 BF |
809 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
810 | { | |
811 | u32 dir = NFS4_CDFC4_FORE; | |
812 | ||
813 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
814 | dir |= NFS4_CDFC4_BACK; | |
815 | ||
816 | return nfsd4_new_conn(rqstp, ses, dir); | |
817 | } | |
818 | ||
819 | /* must be called under client_lock */ | |
19cf5c02 | 820 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 821 | { |
19cf5c02 BF |
822 | struct nfs4_client *clp = s->se_client; |
823 | struct nfsd4_conn *c; | |
ec6b5d7b | 824 | |
19cf5c02 BF |
825 | spin_lock(&clp->cl_lock); |
826 | while (!list_empty(&s->se_conns)) { | |
827 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
828 | list_del_init(&c->cn_persession); | |
829 | spin_unlock(&clp->cl_lock); | |
557ce264 | 830 | |
19cf5c02 BF |
831 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
832 | free_conn(c); | |
ec6b5d7b | 833 | |
19cf5c02 BF |
834 | spin_lock(&clp->cl_lock); |
835 | } | |
836 | spin_unlock(&clp->cl_lock); | |
c7662518 | 837 | } |
ec6b5d7b | 838 | |
c7662518 BF |
839 | void free_session(struct kref *kref) |
840 | { | |
841 | struct nfsd4_session *ses; | |
842 | int mem; | |
843 | ||
844 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 845 | nfsd4_del_conns(ses); |
c7662518 BF |
846 | spin_lock(&nfsd_drc_lock); |
847 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
848 | nfsd_drc_mem_used -= mem; | |
849 | spin_unlock(&nfsd_drc_lock); | |
850 | free_session_slots(ses); | |
851 | kfree(ses); | |
852 | } | |
853 | ||
ac7c46f2 | 854 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
855 | { |
856 | struct nfsd4_session *new; | |
857 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
858 | int numslots, slotsize; | |
c7662518 | 859 | int status; |
5b6feee9 BF |
860 | int idx; |
861 | ||
862 | /* | |
863 | * Note decreasing slot size below client's request may | |
864 | * make it difficult for client to function correctly, whereas | |
865 | * decreasing the number of slots will (just?) affect | |
866 | * performance. When short on memory we therefore prefer to | |
867 | * decrease number of slots instead of their size. | |
868 | */ | |
869 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
870 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
871 | if (numslots < 1) |
872 | return NULL; | |
5b6feee9 BF |
873 | |
874 | new = alloc_session(slotsize, numslots); | |
875 | if (!new) { | |
876 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 877 | return NULL; |
557ce264 | 878 | } |
5b6feee9 | 879 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 880 | |
ec6b5d7b AA |
881 | new->se_client = clp; |
882 | gen_sessionid(new); | |
ec6b5d7b | 883 | |
c7662518 BF |
884 | INIT_LIST_HEAD(&new->se_conns); |
885 | ||
ac7c46f2 | 886 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 887 | new->se_flags = cses->flags; |
8b5ce5cd | 888 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 889 | kref_init(&new->se_ref); |
5b6feee9 | 890 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 891 | spin_lock(&client_lock); |
ec6b5d7b | 892 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 893 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 894 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 895 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 896 | spin_unlock(&client_lock); |
ec6b5d7b | 897 | |
1d1bc8f2 | 898 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 899 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
900 | if (status) { |
901 | free_session(&new->se_ref); | |
ac7c46f2 | 902 | return NULL; |
c7662518 | 903 | } |
dcbeaa68 | 904 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 905 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
906 | /* |
907 | * This is a little silly; with sessions there's no real | |
908 | * use for the callback address. Use the peer address | |
909 | * as a reasonable default for now, but consider fixing | |
910 | * the rpc client not to require an address in the | |
911 | * future: | |
912 | */ | |
edd76786 BF |
913 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
914 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 915 | } |
dcbeaa68 | 916 | nfsd4_probe_callback(clp); |
ac7c46f2 | 917 | return new; |
ec6b5d7b AA |
918 | } |
919 | ||
9089f1b4 | 920 | /* caller must hold client_lock */ |
5282fd72 ME |
921 | static struct nfsd4_session * |
922 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
923 | { | |
924 | struct nfsd4_session *elem; | |
925 | int idx; | |
926 | ||
927 | dump_sessionid(__func__, sessionid); | |
928 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
929 | /* Search in the appropriate list */ |
930 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
931 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
932 | NFS4_MAX_SESSIONID_LEN)) { | |
933 | return elem; | |
934 | } | |
935 | } | |
936 | ||
937 | dprintk("%s: session not found\n", __func__); | |
938 | return NULL; | |
939 | } | |
940 | ||
9089f1b4 | 941 | /* caller must hold client_lock */ |
7116ed6b | 942 | static void |
5282fd72 | 943 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
944 | { |
945 | list_del(&ses->se_hash); | |
4c649378 | 946 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 947 | list_del(&ses->se_perclnt); |
4c649378 | 948 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
949 | } |
950 | ||
36acb66b | 951 | /* must be called under the client_lock */ |
1da177e4 | 952 | static inline void |
36acb66b | 953 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 954 | { |
07cd4909 BH |
955 | if (is_client_expired(clp)) { |
956 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
957 | __func__, | |
958 | clp->cl_clientid.cl_boot, | |
959 | clp->cl_clientid.cl_id); | |
960 | return; | |
961 | } | |
962 | ||
1da177e4 LT |
963 | dprintk("renewing client (clientid %08x/%08x)\n", |
964 | clp->cl_clientid.cl_boot, | |
965 | clp->cl_clientid.cl_id); | |
966 | list_move_tail(&clp->cl_lru, &client_lru); | |
967 | clp->cl_time = get_seconds(); | |
968 | } | |
969 | ||
36acb66b BH |
970 | static inline void |
971 | renew_client(struct nfs4_client *clp) | |
972 | { | |
973 | spin_lock(&client_lock); | |
974 | renew_client_locked(clp); | |
975 | spin_unlock(&client_lock); | |
976 | } | |
977 | ||
1da177e4 LT |
978 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
979 | static int | |
980 | STALE_CLIENTID(clientid_t *clid) | |
981 | { | |
982 | if (clid->cl_boot == boot_time) | |
983 | return 0; | |
60adfc50 AA |
984 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
985 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
986 | return 1; |
987 | } | |
988 | ||
989 | /* | |
990 | * XXX Should we use a slab cache ? | |
991 | * This type of memory management is somewhat inefficient, but we use it | |
992 | * anyway since SETCLIENTID is not a common operation. | |
993 | */ | |
35bba9a3 | 994 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
995 | { |
996 | struct nfs4_client *clp; | |
997 | ||
35bba9a3 BF |
998 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
999 | if (clp == NULL) | |
1000 | return NULL; | |
67114fe6 | 1001 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1002 | if (clp->cl_name.data == NULL) { |
1003 | kfree(clp); | |
1004 | return NULL; | |
1da177e4 | 1005 | } |
35bba9a3 | 1006 | clp->cl_name.len = name.len; |
1da177e4 LT |
1007 | return clp; |
1008 | } | |
1009 | ||
1010 | static inline void | |
1011 | free_client(struct nfs4_client *clp) | |
1012 | { | |
792c95dd BF |
1013 | while (!list_empty(&clp->cl_sessions)) { |
1014 | struct nfsd4_session *ses; | |
1015 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1016 | se_perclnt); | |
1017 | list_del(&ses->se_perclnt); | |
1018 | nfsd4_put_session(ses); | |
1019 | } | |
1da177e4 LT |
1020 | if (clp->cl_cred.cr_group_info) |
1021 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 1022 | kfree(clp->cl_principal); |
1da177e4 LT |
1023 | kfree(clp->cl_name.data); |
1024 | kfree(clp); | |
1025 | } | |
1026 | ||
d7682988 BH |
1027 | void |
1028 | release_session_client(struct nfsd4_session *session) | |
1029 | { | |
1030 | struct nfs4_client *clp = session->se_client; | |
1031 | ||
1032 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1033 | return; | |
1034 | if (is_client_expired(clp)) { | |
1035 | free_client(clp); | |
1036 | session->se_client = NULL; | |
1037 | } else | |
1038 | renew_client_locked(clp); | |
1039 | spin_unlock(&client_lock); | |
d7682988 BH |
1040 | } |
1041 | ||
84d38ac9 BH |
1042 | /* must be called under the client_lock */ |
1043 | static inline void | |
1044 | unhash_client_locked(struct nfs4_client *clp) | |
1045 | { | |
792c95dd BF |
1046 | struct nfsd4_session *ses; |
1047 | ||
07cd4909 | 1048 | mark_client_expired(clp); |
84d38ac9 | 1049 | list_del(&clp->cl_lru); |
4c649378 | 1050 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1051 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1052 | list_del_init(&ses->se_hash); | |
4c649378 | 1053 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1054 | } |
1055 | ||
1da177e4 LT |
1056 | static void |
1057 | expire_client(struct nfs4_client *clp) | |
1058 | { | |
fe0750e5 | 1059 | struct nfs4_openowner *oo; |
1da177e4 | 1060 | struct nfs4_delegation *dp; |
1da177e4 LT |
1061 | struct list_head reaplist; |
1062 | ||
1da177e4 LT |
1063 | INIT_LIST_HEAD(&reaplist); |
1064 | spin_lock(&recall_lock); | |
ea1da636 N |
1065 | while (!list_empty(&clp->cl_delegations)) { |
1066 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1067 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1068 | list_move(&dp->dl_recall_lru, &reaplist); |
1069 | } | |
1070 | spin_unlock(&recall_lock); | |
1071 | while (!list_empty(&reaplist)) { | |
1072 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1073 | unhash_delegation(dp); |
1074 | } | |
ea1da636 | 1075 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1076 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1077 | release_openowner(oo); | |
1da177e4 | 1078 | } |
6ff8da08 | 1079 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1080 | if (clp->cl_cb_conn.cb_xprt) |
1081 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1082 | list_del(&clp->cl_idhash); |
1083 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1084 | spin_lock(&client_lock); |
84d38ac9 | 1085 | unhash_client_locked(clp); |
46583e25 BH |
1086 | if (atomic_read(&clp->cl_refcount) == 0) |
1087 | free_client(clp); | |
be1fdf6c | 1088 | spin_unlock(&client_lock); |
1da177e4 LT |
1089 | } |
1090 | ||
35bba9a3 BF |
1091 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1092 | { | |
1093 | memcpy(target->cl_verifier.data, source->data, | |
1094 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1095 | } |
1096 | ||
35bba9a3 BF |
1097 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1098 | { | |
1da177e4 LT |
1099 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1100 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1101 | } | |
1102 | ||
35bba9a3 BF |
1103 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1104 | { | |
1da177e4 LT |
1105 | target->cr_uid = source->cr_uid; |
1106 | target->cr_gid = source->cr_gid; | |
1107 | target->cr_group_info = source->cr_group_info; | |
1108 | get_group_info(target->cr_group_info); | |
1109 | } | |
1110 | ||
35bba9a3 | 1111 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1112 | { |
a55370a3 | 1113 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1114 | } |
1115 | ||
1116 | static int | |
599e0a22 BF |
1117 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1118 | { | |
1119 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | static int | |
599e0a22 BF |
1123 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1124 | { | |
1125 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | /* XXX what about NGROUP */ | |
1129 | static int | |
599e0a22 BF |
1130 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1131 | { | |
1132 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1133 | } |
1134 | ||
5ec7b46c BF |
1135 | static void gen_clid(struct nfs4_client *clp) |
1136 | { | |
1137 | static u32 current_clientid = 1; | |
1138 | ||
1da177e4 LT |
1139 | clp->cl_clientid.cl_boot = boot_time; |
1140 | clp->cl_clientid.cl_id = current_clientid++; | |
1141 | } | |
1142 | ||
deda2faa BF |
1143 | static void gen_confirm(struct nfs4_client *clp) |
1144 | { | |
1145 | static u32 i; | |
1146 | u32 *p; | |
1da177e4 | 1147 | |
1da177e4 | 1148 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1149 | *p++ = get_seconds(); |
1150 | *p++ = i++; | |
1da177e4 LT |
1151 | } |
1152 | ||
38c2f4b1 | 1153 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1154 | { |
38c2f4b1 | 1155 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1156 | } |
1157 | ||
38c2f4b1 | 1158 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1159 | { |
1160 | struct nfs4_stid *s; | |
4d71ab87 | 1161 | |
38c2f4b1 | 1162 | s = find_stateid(cl, t); |
4d71ab87 BF |
1163 | if (!s) |
1164 | return NULL; | |
f459e453 | 1165 | if (typemask & s->sc_type) |
4581d140 | 1166 | return s; |
4581d140 BF |
1167 | return NULL; |
1168 | } | |
1169 | ||
b09333c4 RL |
1170 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1171 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1172 | { | |
1173 | struct nfs4_client *clp; | |
1174 | struct sockaddr *sa = svc_addr(rqstp); | |
1175 | char *princ; | |
1176 | ||
1177 | clp = alloc_client(name); | |
1178 | if (clp == NULL) | |
1179 | return NULL; | |
1180 | ||
792c95dd BF |
1181 | INIT_LIST_HEAD(&clp->cl_sessions); |
1182 | ||
b09333c4 RL |
1183 | princ = svc_gss_principal(rqstp); |
1184 | if (princ) { | |
1185 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1186 | if (clp->cl_principal == NULL) { | |
1187 | free_client(clp); | |
1188 | return NULL; | |
1189 | } | |
1190 | } | |
1191 | ||
38c2f4b1 | 1192 | idr_init(&clp->cl_stateids); |
b09333c4 | 1193 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1194 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1195 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1196 | INIT_LIST_HEAD(&clp->cl_idhash); |
1197 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1198 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1199 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1200 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1201 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1202 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1203 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1204 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1205 | clear_bit(0, &clp->cl_cb_slot_busy); |
1206 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1207 | copy_verf(clp, verf); | |
1208 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1209 | clp->cl_flavor = rqstp->rq_flavor; | |
1210 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1211 | gen_confirm(clp); | |
edd76786 | 1212 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1213 | return clp; |
1214 | } | |
1215 | ||
fd39ca9a | 1216 | static void |
1da177e4 LT |
1217 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1218 | { | |
1219 | unsigned int idhashval; | |
1220 | ||
1221 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1222 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1223 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1224 | renew_client(clp); |
1da177e4 LT |
1225 | } |
1226 | ||
fd39ca9a | 1227 | static void |
1da177e4 LT |
1228 | move_to_confirmed(struct nfs4_client *clp) |
1229 | { | |
1230 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1231 | unsigned int strhashval; | |
1232 | ||
1233 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1234 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1235 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1236 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1237 | renew_client(clp); |
1238 | } | |
1239 | ||
1240 | static struct nfs4_client * | |
1241 | find_confirmed_client(clientid_t *clid) | |
1242 | { | |
1243 | struct nfs4_client *clp; | |
1244 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1245 | ||
1246 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1247 | if (same_clid(&clp->cl_clientid, clid)) { |
1248 | renew_client(clp); | |
1da177e4 | 1249 | return clp; |
a50d2ad1 | 1250 | } |
1da177e4 LT |
1251 | } |
1252 | return NULL; | |
1253 | } | |
1254 | ||
1255 | static struct nfs4_client * | |
1256 | find_unconfirmed_client(clientid_t *clid) | |
1257 | { | |
1258 | struct nfs4_client *clp; | |
1259 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1260 | ||
1261 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1262 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1263 | return clp; |
1264 | } | |
1265 | return NULL; | |
1266 | } | |
1267 | ||
6e5f15c9 | 1268 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1269 | { |
6e5f15c9 | 1270 | return clp->cl_exchange_flags != 0; |
e203d506 | 1271 | } |
a1bcecd2 | 1272 | |
28ce6054 | 1273 | static struct nfs4_client * |
e203d506 | 1274 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1275 | { |
1276 | struct nfs4_client *clp; | |
1277 | ||
1278 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1279 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1280 | return clp; |
1281 | } | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | static struct nfs4_client * | |
e203d506 | 1286 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1287 | { |
1288 | struct nfs4_client *clp; | |
1289 | ||
1290 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1291 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1292 | return clp; |
1293 | } | |
1294 | return NULL; | |
1295 | } | |
1296 | ||
fd39ca9a | 1297 | static void |
6f3d772f | 1298 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1299 | { |
07263f1e | 1300 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1301 | struct sockaddr *sa = svc_addr(rqstp); |
1302 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1303 | unsigned short expected_family; |
1304 | ||
1305 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1306 | if (se->se_callback_netid_len == 3 && | |
1307 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1308 | expected_family = AF_INET; | |
1309 | else if (se->se_callback_netid_len == 4 && | |
1310 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1311 | expected_family = AF_INET6; | |
1312 | else | |
1da177e4 LT |
1313 | goto out_err; |
1314 | ||
07263f1e | 1315 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1316 | se->se_callback_addr_len, |
07263f1e BF |
1317 | (struct sockaddr *)&conn->cb_addr, |
1318 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1319 | |
07263f1e | 1320 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1321 | goto out_err; |
aa9a4ec7 | 1322 | |
07263f1e BF |
1323 | if (conn->cb_addr.ss_family == AF_INET6) |
1324 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1325 | |
07263f1e BF |
1326 | conn->cb_prog = se->se_callback_prog; |
1327 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1328 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1329 | return; |
1330 | out_err: | |
07263f1e BF |
1331 | conn->cb_addr.ss_family = AF_UNSPEC; |
1332 | conn->cb_addrlen = 0; | |
849823c5 | 1333 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1334 | "will not receive delegations\n", |
1335 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1336 | ||
1da177e4 LT |
1337 | return; |
1338 | } | |
1339 | ||
074fe897 | 1340 | /* |
557ce264 | 1341 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1342 | */ |
074fe897 AA |
1343 | void |
1344 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1345 | { |
557ce264 AA |
1346 | struct nfsd4_slot *slot = resp->cstate.slot; |
1347 | unsigned int base; | |
074fe897 | 1348 | |
557ce264 | 1349 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1350 | |
557ce264 AA |
1351 | slot->sl_opcnt = resp->opcnt; |
1352 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1353 | |
bf5c43c8 | 1354 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1355 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1356 | slot->sl_datalen = 0; |
bf864a31 | 1357 | return; |
074fe897 | 1358 | } |
557ce264 AA |
1359 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1360 | base = (char *)resp->cstate.datap - | |
1361 | (char *)resp->xbuf->head[0].iov_base; | |
1362 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1363 | slot->sl_datalen)) | |
1364 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1365 | return; | |
074fe897 AA |
1366 | } |
1367 | ||
1368 | /* | |
abfabf8c AA |
1369 | * Encode the replay sequence operation from the slot values. |
1370 | * If cachethis is FALSE encode the uncached rep error on the next | |
1371 | * operation which sets resp->p and increments resp->opcnt for | |
1372 | * nfs4svc_encode_compoundres. | |
074fe897 | 1373 | * |
074fe897 | 1374 | */ |
abfabf8c AA |
1375 | static __be32 |
1376 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1377 | struct nfsd4_compoundres *resp) | |
074fe897 | 1378 | { |
abfabf8c AA |
1379 | struct nfsd4_op *op; |
1380 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1381 | |
abfabf8c AA |
1382 | /* Encode the replayed sequence operation */ |
1383 | op = &args->ops[resp->opcnt - 1]; | |
1384 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1385 | |
abfabf8c | 1386 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1387 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1388 | op = &args->ops[resp->opcnt++]; |
1389 | op->status = nfserr_retry_uncached_rep; | |
1390 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1391 | } |
abfabf8c | 1392 | return op->status; |
074fe897 AA |
1393 | } |
1394 | ||
1395 | /* | |
557ce264 AA |
1396 | * The sequence operation is not cached because we can use the slot and |
1397 | * session values. | |
074fe897 AA |
1398 | */ |
1399 | __be32 | |
bf864a31 AA |
1400 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1401 | struct nfsd4_sequence *seq) | |
074fe897 | 1402 | { |
557ce264 | 1403 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1404 | __be32 status; |
1405 | ||
557ce264 | 1406 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1407 | |
abfabf8c AA |
1408 | /* Either returns 0 or nfserr_retry_uncached */ |
1409 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1410 | if (status == nfserr_retry_uncached_rep) | |
1411 | return status; | |
074fe897 | 1412 | |
557ce264 AA |
1413 | /* The sequence operation has been encoded, cstate->datap set. */ |
1414 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1415 | |
557ce264 AA |
1416 | resp->opcnt = slot->sl_opcnt; |
1417 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1418 | status = slot->sl_status; | |
074fe897 AA |
1419 | |
1420 | return status; | |
1421 | } | |
1422 | ||
0733d213 AA |
1423 | /* |
1424 | * Set the exchange_id flags returned by the server. | |
1425 | */ | |
1426 | static void | |
1427 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1428 | { | |
1429 | /* pNFS is not supported */ | |
1430 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1431 | ||
1432 | /* Referrals are supported, Migration is not. */ | |
1433 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1434 | ||
1435 | /* set the wire flags to return to client. */ | |
1436 | clid->flags = new->cl_exchange_flags; | |
1437 | } | |
1438 | ||
069b6ad4 AA |
1439 | __be32 |
1440 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1441 | struct nfsd4_compound_state *cstate, | |
1442 | struct nfsd4_exchange_id *exid) | |
1443 | { | |
0733d213 AA |
1444 | struct nfs4_client *unconf, *conf, *new; |
1445 | int status; | |
1446 | unsigned int strhashval; | |
1447 | char dname[HEXDIR_LEN]; | |
363168b4 | 1448 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1449 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1450 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1451 | |
363168b4 | 1452 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1453 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1454 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1455 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1456 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1457 | |
a084daf5 | 1458 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1459 | return nfserr_inval; |
1460 | ||
1461 | /* Currently only support SP4_NONE */ | |
1462 | switch (exid->spa_how) { | |
1463 | case SP4_NONE: | |
1464 | break; | |
1465 | case SP4_SSV: | |
044bc1d4 | 1466 | return nfserr_serverfault; |
0733d213 AA |
1467 | default: |
1468 | BUG(); /* checked by xdr code */ | |
1469 | case SP4_MACH_CRED: | |
1470 | return nfserr_serverfault; /* no excuse :-/ */ | |
1471 | } | |
1472 | ||
1473 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1474 | ||
1475 | if (status) | |
1476 | goto error; | |
1477 | ||
1478 | strhashval = clientstr_hashval(dname); | |
1479 | ||
1480 | nfs4_lock_state(); | |
1481 | status = nfs_ok; | |
1482 | ||
e203d506 | 1483 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1484 | if (conf) { |
e203d506 BF |
1485 | if (!clp_used_exchangeid(conf)) { |
1486 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1487 | goto out; | |
1488 | } | |
0733d213 AA |
1489 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1490 | /* 18.35.4 case 8 */ | |
1491 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1492 | status = nfserr_not_same; | |
1493 | goto out; | |
1494 | } | |
1495 | /* Client reboot: destroy old state */ | |
1496 | expire_client(conf); | |
1497 | goto out_new; | |
1498 | } | |
1499 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1500 | /* 18.35.4 case 9 */ | |
1501 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1502 | status = nfserr_perm; | |
1503 | goto out; | |
1504 | } | |
1505 | expire_client(conf); | |
1506 | goto out_new; | |
1507 | } | |
0733d213 AA |
1508 | /* |
1509 | * Set bit when the owner id and verifier map to an already | |
1510 | * confirmed client id (18.35.3). | |
1511 | */ | |
1512 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1513 | ||
1514 | /* | |
1515 | * Falling into 18.35.4 case 2, possible router replay. | |
1516 | * Leave confirmed record intact and return same result. | |
1517 | */ | |
1518 | copy_verf(conf, &verf); | |
1519 | new = conf; | |
1520 | goto out_copy; | |
6ddbbbfe MS |
1521 | } |
1522 | ||
1523 | /* 18.35.4 case 7 */ | |
1524 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1525 | status = nfserr_noent; | |
1526 | goto out; | |
0733d213 AA |
1527 | } |
1528 | ||
e203d506 | 1529 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1530 | if (unconf) { |
1531 | /* | |
1532 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1533 | * a new unconfirmed record should be generated regardless | |
1534 | * of whether any properties have changed. | |
1535 | */ | |
1536 | expire_client(unconf); | |
1537 | } | |
1538 | ||
1539 | out_new: | |
1540 | /* Normal case */ | |
b09333c4 | 1541 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1542 | if (new == NULL) { |
4731030d | 1543 | status = nfserr_jukebox; |
0733d213 AA |
1544 | goto out; |
1545 | } | |
1546 | ||
0733d213 | 1547 | gen_clid(new); |
0733d213 AA |
1548 | add_to_unconfirmed(new, strhashval); |
1549 | out_copy: | |
1550 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1551 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1552 | ||
38eb76a5 | 1553 | exid->seqid = 1; |
0733d213 AA |
1554 | nfsd4_set_ex_flags(new, exid); |
1555 | ||
1556 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1557 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1558 | status = nfs_ok; |
1559 | ||
1560 | out: | |
1561 | nfs4_unlock_state(); | |
1562 | error: | |
1563 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1564 | return status; | |
069b6ad4 AA |
1565 | } |
1566 | ||
b85d4c01 | 1567 | static int |
88e588d5 | 1568 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1569 | { |
88e588d5 AA |
1570 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1571 | slot_seqid); | |
b85d4c01 BH |
1572 | |
1573 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1574 | if (slot_inuse) { |
1575 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1576 | return nfserr_jukebox; |
1577 | else | |
1578 | return nfserr_seq_misordered; | |
1579 | } | |
f6d82485 | 1580 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1581 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1582 | return nfs_ok; |
88e588d5 | 1583 | if (seqid == slot_seqid) |
b85d4c01 | 1584 | return nfserr_replay_cache; |
b85d4c01 BH |
1585 | return nfserr_seq_misordered; |
1586 | } | |
1587 | ||
49557cc7 AA |
1588 | /* |
1589 | * Cache the create session result into the create session single DRC | |
1590 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1591 | * Do this for solo or embedded create session operations. | |
1592 | */ | |
1593 | static void | |
1594 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1595 | struct nfsd4_clid_slot *slot, int nfserr) | |
1596 | { | |
1597 | slot->sl_status = nfserr; | |
1598 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1599 | } | |
1600 | ||
1601 | static __be32 | |
1602 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1603 | struct nfsd4_clid_slot *slot) | |
1604 | { | |
1605 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1606 | return slot->sl_status; | |
1607 | } | |
1608 | ||
1b74c25b MJ |
1609 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1610 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1611 | 1 + /* MIN tag is length with zero, only length */ \ | |
1612 | 3 + /* version, opcount, opcode */ \ | |
1613 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1614 | /* seqid, slotID, slotID, cache */ \ | |
1615 | 4 ) * sizeof(__be32)) | |
1616 | ||
1617 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1618 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1619 | 1 + /* status */ \ | |
1620 | 1 + /* MIN tag is length with zero, only length */ \ | |
1621 | 3 + /* opcount, opcode, opstatus*/ \ | |
1622 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1623 | /* seqid, slotID, slotID, slotID, status */ \ | |
1624 | 5 ) * sizeof(__be32)) | |
1625 | ||
1626 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1627 | { | |
1628 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1629 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1630 | } | |
1631 | ||
069b6ad4 AA |
1632 | __be32 |
1633 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1634 | struct nfsd4_compound_state *cstate, | |
1635 | struct nfsd4_create_session *cr_ses) | |
1636 | { | |
363168b4 | 1637 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1638 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1639 | struct nfsd4_session *new; |
49557cc7 | 1640 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1641 | bool confirm_me = false; |
ec6b5d7b AA |
1642 | int status = 0; |
1643 | ||
a62573dc MJ |
1644 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1645 | return nfserr_inval; | |
1646 | ||
ec6b5d7b AA |
1647 | nfs4_lock_state(); |
1648 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1649 | conf = find_confirmed_client(&cr_ses->clientid); | |
1650 | ||
1651 | if (conf) { | |
49557cc7 AA |
1652 | cs_slot = &conf->cl_cs_slot; |
1653 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1654 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1655 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1656 | cs_slot->sl_seqid); |
38eb76a5 | 1657 | /* Return the cached reply status */ |
49557cc7 | 1658 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1659 | goto out; |
49557cc7 | 1660 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1661 | status = nfserr_seq_misordered; |
1662 | dprintk("Sequence misordered!\n"); | |
1663 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1664 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1665 | goto out; |
1666 | } | |
ec6b5d7b AA |
1667 | } else if (unconf) { |
1668 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1669 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1670 | status = nfserr_clid_inuse; |
1671 | goto out; | |
1672 | } | |
1673 | ||
49557cc7 AA |
1674 | cs_slot = &unconf->cl_cs_slot; |
1675 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1676 | if (status) { |
1677 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1678 | status = nfserr_seq_misordered; |
cd5b8144 | 1679 | goto out; |
ec6b5d7b AA |
1680 | } |
1681 | ||
86c3e16c | 1682 | confirm_me = true; |
ec6b5d7b AA |
1683 | conf = unconf; |
1684 | } else { | |
1685 | status = nfserr_stale_clientid; | |
1686 | goto out; | |
1687 | } | |
1688 | ||
8323c3b2 BF |
1689 | /* |
1690 | * XXX: we should probably set this at creation time, and check | |
1691 | * for consistent minorversion use throughout: | |
1692 | */ | |
1693 | conf->cl_minorversion = 1; | |
408b79bc BF |
1694 | /* |
1695 | * We do not support RDMA or persistent sessions | |
1696 | */ | |
1697 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1698 | cr_ses->flags &= ~SESSION4_RDMA; | |
1699 | ||
1b74c25b MJ |
1700 | status = nfserr_toosmall; |
1701 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1702 | goto out; | |
1703 | ||
ac7c46f2 BF |
1704 | status = nfserr_jukebox; |
1705 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1706 | if (!new) | |
ec6b5d7b | 1707 | goto out; |
ac7c46f2 BF |
1708 | status = nfs_ok; |
1709 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1710 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1711 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1712 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1713 | cs_slot->sl_seqid++; |
49557cc7 | 1714 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1715 | |
49557cc7 AA |
1716 | /* cache solo and embedded create sessions under the state lock */ |
1717 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1718 | if (confirm_me) |
1719 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1720 | out: |
1721 | nfs4_unlock_state(); | |
1722 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1723 | return status; | |
069b6ad4 AA |
1724 | } |
1725 | ||
57716355 BF |
1726 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1727 | { | |
1728 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1729 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1730 | ||
1731 | return argp->opcnt == resp->opcnt; | |
1732 | } | |
1733 | ||
1d1bc8f2 BF |
1734 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1735 | { | |
1736 | switch (*dir) { | |
1737 | case NFS4_CDFC4_FORE: | |
1738 | case NFS4_CDFC4_BACK: | |
1739 | return nfs_ok; | |
1740 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1741 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1742 | *dir = NFS4_CDFC4_BOTH; | |
1743 | return nfs_ok; | |
1744 | }; | |
1745 | return nfserr_inval; | |
1746 | } | |
1747 | ||
1748 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1749 | struct nfsd4_compound_state *cstate, | |
1750 | struct nfsd4_bind_conn_to_session *bcts) | |
1751 | { | |
1752 | __be32 status; | |
1753 | ||
1754 | if (!nfsd4_last_compound_op(rqstp)) | |
1755 | return nfserr_not_only_op; | |
1756 | spin_lock(&client_lock); | |
1757 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1758 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1759 | * client_lock iself: */ | |
1760 | if (cstate->session) { | |
1761 | nfsd4_get_session(cstate->session); | |
1762 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1763 | } | |
1764 | spin_unlock(&client_lock); | |
1765 | if (!cstate->session) | |
1766 | return nfserr_badsession; | |
1767 | ||
1768 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1769 | if (!status) |
1770 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1771 | return status; | |
1d1bc8f2 BF |
1772 | } |
1773 | ||
5d4cec2f BF |
1774 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1775 | { | |
1776 | if (!session) | |
1777 | return 0; | |
1778 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1779 | } | |
1780 | ||
069b6ad4 AA |
1781 | __be32 |
1782 | nfsd4_destroy_session(struct svc_rqst *r, | |
1783 | struct nfsd4_compound_state *cstate, | |
1784 | struct nfsd4_destroy_session *sessionid) | |
1785 | { | |
e10e0cfc BH |
1786 | struct nfsd4_session *ses; |
1787 | u32 status = nfserr_badsession; | |
1788 | ||
1789 | /* Notes: | |
1790 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1791 | * - Should we return nfserr_back_chan_busy if waiting for | |
1792 | * callbacks on to-be-destroyed session? | |
1793 | * - Do we need to clear any callback info from previous session? | |
1794 | */ | |
1795 | ||
5d4cec2f | 1796 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1797 | if (!nfsd4_last_compound_op(r)) |
1798 | return nfserr_not_only_op; | |
1799 | } | |
e10e0cfc | 1800 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1801 | spin_lock(&client_lock); |
e10e0cfc BH |
1802 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1803 | if (!ses) { | |
9089f1b4 | 1804 | spin_unlock(&client_lock); |
e10e0cfc BH |
1805 | goto out; |
1806 | } | |
1807 | ||
1808 | unhash_session(ses); | |
9089f1b4 | 1809 | spin_unlock(&client_lock); |
e10e0cfc | 1810 | |
ab707e15 | 1811 | nfs4_lock_state(); |
84f5f7cc | 1812 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1813 | nfs4_unlock_state(); |
19cf5c02 BF |
1814 | |
1815 | nfsd4_del_conns(ses); | |
1816 | ||
e10e0cfc BH |
1817 | nfsd4_put_session(ses); |
1818 | status = nfs_ok; | |
1819 | out: | |
1820 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1821 | return status; | |
069b6ad4 AA |
1822 | } |
1823 | ||
a663bdd8 | 1824 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1825 | { |
1826 | struct nfsd4_conn *c; | |
1827 | ||
1828 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1829 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1830 | return c; |
1831 | } | |
1832 | } | |
1833 | return NULL; | |
1834 | } | |
1835 | ||
a663bdd8 | 1836 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1837 | { |
1838 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1839 | struct nfsd4_conn *c; |
21b75b01 | 1840 | int ret; |
328ead28 BF |
1841 | |
1842 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1843 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1844 | if (c) { |
1845 | spin_unlock(&clp->cl_lock); | |
1846 | free_conn(new); | |
1847 | return; | |
1848 | } | |
1849 | __nfsd4_hash_conn(new, ses); | |
1850 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1851 | ret = nfsd4_register_conn(new); |
1852 | if (ret) | |
1853 | /* oops; xprt is already down: */ | |
1854 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1855 | return; |
1856 | } | |
1857 | ||
868b89c3 MJ |
1858 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1859 | { | |
1860 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1861 | ||
1862 | return args->opcnt > session->se_fchannel.maxops; | |
1863 | } | |
1864 | ||
ae82a8d0 MJ |
1865 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1866 | struct nfsd4_session *session) | |
1867 | { | |
1868 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1869 | ||
1870 | return xb->len > session->se_fchannel.maxreq_sz; | |
1871 | } | |
1872 | ||
069b6ad4 | 1873 | __be32 |
b85d4c01 | 1874 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1875 | struct nfsd4_compound_state *cstate, |
1876 | struct nfsd4_sequence *seq) | |
1877 | { | |
f9bb94c4 | 1878 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1879 | struct nfsd4_session *session; |
1880 | struct nfsd4_slot *slot; | |
a663bdd8 | 1881 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1882 | int status; |
1883 | ||
f9bb94c4 AA |
1884 | if (resp->opcnt != 1) |
1885 | return nfserr_sequence_pos; | |
1886 | ||
a663bdd8 BF |
1887 | /* |
1888 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1889 | * below. | |
1890 | */ | |
1891 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1892 | if (!conn) | |
1893 | return nfserr_jukebox; | |
1894 | ||
9089f1b4 | 1895 | spin_lock(&client_lock); |
b85d4c01 BH |
1896 | status = nfserr_badsession; |
1897 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1898 | if (!session) | |
1899 | goto out; | |
1900 | ||
868b89c3 MJ |
1901 | status = nfserr_too_many_ops; |
1902 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1903 | goto out; | |
1904 | ||
ae82a8d0 MJ |
1905 | status = nfserr_req_too_big; |
1906 | if (nfsd4_request_too_big(rqstp, session)) | |
1907 | goto out; | |
1908 | ||
b85d4c01 | 1909 | status = nfserr_badslot; |
6c18ba9f | 1910 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1911 | goto out; |
1912 | ||
557ce264 | 1913 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1914 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1915 | ||
a8dfdaeb AA |
1916 | /* We do not negotiate the number of slots yet, so set the |
1917 | * maxslots to the session maxreqs which is used to encode | |
1918 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1919 | seq->maxslots = session->se_fchannel.maxreqs; | |
1920 | ||
73e79482 BF |
1921 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
1922 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 1923 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
1924 | status = nfserr_seq_misordered; |
1925 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
1926 | goto out; | |
b85d4c01 BH |
1927 | cstate->slot = slot; |
1928 | cstate->session = session; | |
da3846a2 | 1929 | /* Return the cached reply status and set cstate->status |
557ce264 | 1930 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1931 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1932 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1933 | goto out; |
b85d4c01 BH |
1934 | } |
1935 | if (status) | |
1936 | goto out; | |
1937 | ||
a663bdd8 BF |
1938 | nfsd4_sequence_check_conn(conn, session); |
1939 | conn = NULL; | |
328ead28 | 1940 | |
b85d4c01 | 1941 | /* Success! bump slot seqid */ |
b85d4c01 | 1942 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 1943 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
1944 | if (seq->cachethis) |
1945 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
1946 | else |
1947 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
1948 | |
1949 | cstate->slot = slot; | |
1950 | cstate->session = session; | |
1951 | ||
b85d4c01 | 1952 | out: |
26c0c75e | 1953 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1954 | if (cstate->session) { |
0d7bb719 BF |
1955 | struct nfs4_client *clp = session->se_client; |
1956 | ||
36acb66b | 1957 | nfsd4_get_session(cstate->session); |
0d7bb719 | 1958 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
1959 | switch (clp->cl_cb_state) { |
1960 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 1961 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
1962 | break; |
1963 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 1964 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 1965 | break; |
fc0c3dd1 BH |
1966 | default: |
1967 | seq->status_flags = 0; | |
5423732a | 1968 | } |
aaf84eb9 | 1969 | } |
a663bdd8 | 1970 | kfree(conn); |
36acb66b | 1971 | spin_unlock(&client_lock); |
b85d4c01 BH |
1972 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1973 | return status; | |
069b6ad4 AA |
1974 | } |
1975 | ||
345c2842 MJ |
1976 | static inline bool has_resources(struct nfs4_client *clp) |
1977 | { | |
1978 | return !list_empty(&clp->cl_openowners) | |
1979 | || !list_empty(&clp->cl_delegations) | |
1980 | || !list_empty(&clp->cl_sessions); | |
1981 | } | |
1982 | ||
1983 | __be32 | |
1984 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
1985 | { | |
1986 | struct nfs4_client *conf, *unconf, *clp; | |
1987 | int status = 0; | |
1988 | ||
1989 | nfs4_lock_state(); | |
1990 | unconf = find_unconfirmed_client(&dc->clientid); | |
1991 | conf = find_confirmed_client(&dc->clientid); | |
1992 | ||
1993 | if (conf) { | |
1994 | clp = conf; | |
1995 | ||
1996 | if (!is_client_expired(conf) && has_resources(conf)) { | |
1997 | status = nfserr_clientid_busy; | |
1998 | goto out; | |
1999 | } | |
2000 | ||
2001 | /* rfc5661 18.50.3 */ | |
2002 | if (cstate->session && conf == cstate->session->se_client) { | |
2003 | status = nfserr_clientid_busy; | |
2004 | goto out; | |
2005 | } | |
2006 | } else if (unconf) | |
2007 | clp = unconf; | |
2008 | else { | |
2009 | status = nfserr_stale_clientid; | |
2010 | goto out; | |
2011 | } | |
2012 | ||
2013 | expire_client(clp); | |
2014 | out: | |
2015 | nfs4_unlock_state(); | |
2016 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2017 | return status; | |
2018 | } | |
2019 | ||
4dc6ec00 BF |
2020 | __be32 |
2021 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2022 | { | |
bcecf1cc MJ |
2023 | int status = 0; |
2024 | ||
4dc6ec00 BF |
2025 | if (rc->rca_one_fs) { |
2026 | if (!cstate->current_fh.fh_dentry) | |
2027 | return nfserr_nofilehandle; | |
2028 | /* | |
2029 | * We don't take advantage of the rca_one_fs case. | |
2030 | * That's OK, it's optional, we can safely ignore it. | |
2031 | */ | |
2032 | return nfs_ok; | |
2033 | } | |
bcecf1cc | 2034 | |
4dc6ec00 | 2035 | nfs4_lock_state(); |
bcecf1cc MJ |
2036 | status = nfserr_complete_already; |
2037 | if (cstate->session->se_client->cl_firststate) | |
2038 | goto out; | |
2039 | ||
2040 | status = nfserr_stale_clientid; | |
2041 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2042 | /* |
2043 | * The following error isn't really legal. | |
2044 | * But we only get here if the client just explicitly | |
2045 | * destroyed the client. Surely it no longer cares what | |
2046 | * error it gets back on an operation for the dead | |
2047 | * client. | |
2048 | */ | |
bcecf1cc MJ |
2049 | goto out; |
2050 | ||
2051 | status = nfs_ok; | |
4dc6ec00 | 2052 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 2053 | out: |
4dc6ec00 | 2054 | nfs4_unlock_state(); |
bcecf1cc | 2055 | return status; |
4dc6ec00 BF |
2056 | } |
2057 | ||
b37ad28b | 2058 | __be32 |
b591480b BF |
2059 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2060 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2061 | { |
a084daf5 | 2062 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2063 | nfs4_verifier clverifier = setclid->se_verf; |
2064 | unsigned int strhashval; | |
28ce6054 | 2065 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2066 | __be32 status; |
a55370a3 | 2067 | char dname[HEXDIR_LEN]; |
1da177e4 | 2068 | |
a55370a3 N |
2069 | status = nfs4_make_rec_clidname(dname, &clname); |
2070 | if (status) | |
73aea4ec | 2071 | return status; |
a55370a3 | 2072 | |
1da177e4 LT |
2073 | /* |
2074 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2075 | * We get here on a DRC miss. | |
2076 | */ | |
2077 | ||
a55370a3 | 2078 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2079 | |
1da177e4 | 2080 | nfs4_lock_state(); |
e203d506 | 2081 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2082 | if (conf) { |
a186e767 | 2083 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2084 | status = nfserr_clid_inuse; |
e203d506 BF |
2085 | if (clp_used_exchangeid(conf)) |
2086 | goto out; | |
026722c2 | 2087 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2088 | char addr_str[INET6_ADDRSTRLEN]; |
2089 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2090 | sizeof(addr_str)); | |
2091 | dprintk("NFSD: setclientid: string in use by client " | |
2092 | "at %s\n", addr_str); | |
1da177e4 LT |
2093 | goto out; |
2094 | } | |
1da177e4 | 2095 | } |
a186e767 BF |
2096 | /* |
2097 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2098 | * has a description of SETCLIENTID request processing consisting | |
2099 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2100 | */ | |
e203d506 | 2101 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2102 | status = nfserr_jukebox; |
1da177e4 | 2103 | if (!conf) { |
a186e767 BF |
2104 | /* |
2105 | * RFC 3530 14.2.33 CASE 4: | |
2106 | * placed first, because it is the normal case | |
1da177e4 LT |
2107 | */ |
2108 | if (unconf) | |
2109 | expire_client(unconf); | |
b09333c4 | 2110 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2111 | if (new == NULL) |
1da177e4 | 2112 | goto out; |
1da177e4 | 2113 | gen_clid(new); |
599e0a22 | 2114 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2115 | /* |
a186e767 BF |
2116 | * RFC 3530 14.2.33 CASE 1: |
2117 | * probable callback update | |
1da177e4 | 2118 | */ |
31f4a6c1 N |
2119 | if (unconf) { |
2120 | /* Note this is removing unconfirmed {*x***}, | |
2121 | * which is stronger than RFC recommended {vxc**}. | |
2122 | * This has the advantage that there is at most | |
2123 | * one {*x***} in either list at any time. | |
2124 | */ | |
2125 | expire_client(unconf); | |
1da177e4 | 2126 | } |
b09333c4 | 2127 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2128 | if (new == NULL) |
1da177e4 | 2129 | goto out; |
1da177e4 | 2130 | copy_clid(new, conf); |
1da177e4 LT |
2131 | } else if (!unconf) { |
2132 | /* | |
a186e767 BF |
2133 | * RFC 3530 14.2.33 CASE 2: |
2134 | * probable client reboot; state will be removed if | |
2135 | * confirmed. | |
1da177e4 | 2136 | */ |
b09333c4 | 2137 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2138 | if (new == NULL) |
1da177e4 | 2139 | goto out; |
1da177e4 | 2140 | gen_clid(new); |
49ba8781 | 2141 | } else { |
a186e767 BF |
2142 | /* |
2143 | * RFC 3530 14.2.33 CASE 3: | |
2144 | * probable client reboot; state will be removed if | |
2145 | * confirmed. | |
1da177e4 LT |
2146 | */ |
2147 | expire_client(unconf); | |
b09333c4 | 2148 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2149 | if (new == NULL) |
1da177e4 | 2150 | goto out; |
1da177e4 | 2151 | gen_clid(new); |
1da177e4 | 2152 | } |
8323c3b2 BF |
2153 | /* |
2154 | * XXX: we should probably set this at creation time, and check | |
2155 | * for consistent minorversion use throughout: | |
2156 | */ | |
2157 | new->cl_minorversion = 0; | |
6f3d772f | 2158 | gen_callback(new, setclid, rqstp); |
c175b83c | 2159 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2160 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2161 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2162 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2163 | status = nfs_ok; | |
2164 | out: | |
2165 | nfs4_unlock_state(); | |
2166 | return status; | |
2167 | } | |
2168 | ||
2169 | ||
2170 | /* | |
a186e767 BF |
2171 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2172 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2173 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2174 | */ |
b37ad28b | 2175 | __be32 |
b591480b BF |
2176 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2177 | struct nfsd4_compound_state *cstate, | |
2178 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2179 | { |
363168b4 | 2180 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2181 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2182 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2183 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2184 | __be32 status; |
1da177e4 LT |
2185 | |
2186 | if (STALE_CLIENTID(clid)) | |
2187 | return nfserr_stale_clientid; | |
2188 | /* | |
2189 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2190 | * We get here on a DRC miss. | |
2191 | */ | |
2192 | ||
2193 | nfs4_lock_state(); | |
21ab45a4 N |
2194 | |
2195 | conf = find_confirmed_client(clid); | |
2196 | unconf = find_unconfirmed_client(clid); | |
2197 | ||
2198 | status = nfserr_clid_inuse; | |
363168b4 | 2199 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2200 | goto out; |
363168b4 | 2201 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2202 | goto out; |
2203 | ||
a186e767 BF |
2204 | /* |
2205 | * section 14.2.34 of RFC 3530 has a description of | |
2206 | * SETCLIENTID_CONFIRM request processing consisting | |
2207 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2208 | */ | |
366e0c1d | 2209 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2210 | /* |
2211 | * RFC 3530 14.2.34 CASE 1: | |
2212 | * callback update | |
2213 | */ | |
599e0a22 | 2214 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2215 | status = nfserr_clid_inuse; |
2216 | else { | |
5a3c9d71 BF |
2217 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2218 | nfsd4_probe_callback(conf); | |
1a69c179 | 2219 | expire_client(unconf); |
1da177e4 | 2220 | status = nfs_ok; |
1a69c179 | 2221 | |
1da177e4 | 2222 | } |
f3aba4e5 | 2223 | } else if (conf && !unconf) { |
a186e767 BF |
2224 | /* |
2225 | * RFC 3530 14.2.34 CASE 2: | |
2226 | * probable retransmitted request; play it safe and | |
2227 | * do nothing. | |
7c79f737 | 2228 | */ |
599e0a22 | 2229 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2230 | status = nfserr_clid_inuse; |
21ab45a4 | 2231 | else |
1da177e4 | 2232 | status = nfs_ok; |
7c79f737 | 2233 | } else if (!conf && unconf |
599e0a22 | 2234 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2235 | /* |
2236 | * RFC 3530 14.2.34 CASE 3: | |
2237 | * Normal case; new or rebooted client: | |
7c79f737 | 2238 | */ |
599e0a22 | 2239 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2240 | status = nfserr_clid_inuse; |
2241 | } else { | |
1a69c179 N |
2242 | unsigned int hash = |
2243 | clientstr_hashval(unconf->cl_recdir); | |
2244 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2245 | hash); |
1a69c179 | 2246 | if (conf) { |
c7b9a459 | 2247 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2248 | expire_client(conf); |
2249 | } | |
1da177e4 | 2250 | move_to_confirmed(unconf); |
21ab45a4 | 2251 | conf = unconf; |
5a3c9d71 | 2252 | nfsd4_probe_callback(conf); |
1a69c179 | 2253 | status = nfs_ok; |
1da177e4 | 2254 | } |
599e0a22 BF |
2255 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2256 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2257 | &confirm)))) { |
a186e767 BF |
2258 | /* |
2259 | * RFC 3530 14.2.34 CASE 4: | |
2260 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2261 | */ |
1da177e4 | 2262 | status = nfserr_stale_clientid; |
7c79f737 | 2263 | } else { |
08e8987c N |
2264 | /* check that we have hit one of the cases...*/ |
2265 | status = nfserr_clid_inuse; | |
2266 | } | |
1da177e4 | 2267 | out: |
1da177e4 LT |
2268 | nfs4_unlock_state(); |
2269 | return status; | |
2270 | } | |
2271 | ||
32513b40 BF |
2272 | static struct nfs4_file *nfsd4_alloc_file(void) |
2273 | { | |
2274 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2275 | } | |
2276 | ||
1da177e4 | 2277 | /* OPEN Share state helper functions */ |
32513b40 | 2278 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2279 | { |
1da177e4 LT |
2280 | unsigned int hashval = file_hashval(ino); |
2281 | ||
32513b40 BF |
2282 | atomic_set(&fp->fi_ref, 1); |
2283 | INIT_LIST_HEAD(&fp->fi_hash); | |
2284 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2285 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2286 | fp->fi_inode = igrab(ino); | |
2287 | fp->fi_had_conflict = false; | |
2288 | fp->fi_lease = NULL; | |
2289 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2290 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2291 | spin_lock(&recall_lock); | |
2292 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2293 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2294 | } |
2295 | ||
e60d4398 | 2296 | static void |
e18b890b | 2297 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2298 | { |
e60d4398 N |
2299 | if (*slab == NULL) |
2300 | return; | |
1a1d92c1 | 2301 | kmem_cache_destroy(*slab); |
e60d4398 | 2302 | *slab = NULL; |
1da177e4 LT |
2303 | } |
2304 | ||
e8ff2a84 | 2305 | void |
1da177e4 LT |
2306 | nfsd4_free_slabs(void) |
2307 | { | |
fe0750e5 BF |
2308 | nfsd4_free_slab(&openowner_slab); |
2309 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2310 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2311 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2312 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2313 | } |
1da177e4 | 2314 | |
72083396 | 2315 | int |
e60d4398 N |
2316 | nfsd4_init_slabs(void) |
2317 | { | |
fe0750e5 BF |
2318 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2319 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2320 | if (openowner_slab == NULL) | |
2321 | goto out_nomem; | |
2322 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2323 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2324 | if (lockowner_slab == NULL) | |
e60d4398 N |
2325 | goto out_nomem; |
2326 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2327 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2328 | if (file_slab == NULL) |
2329 | goto out_nomem; | |
5ac049ac | 2330 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2331 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2332 | if (stateid_slab == NULL) |
2333 | goto out_nomem; | |
5b2d21c1 | 2334 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2335 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2336 | if (deleg_slab == NULL) |
2337 | goto out_nomem; | |
e60d4398 N |
2338 | return 0; |
2339 | out_nomem: | |
2340 | nfsd4_free_slabs(); | |
2341 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2342 | return -ENOMEM; | |
1da177e4 LT |
2343 | } |
2344 | ||
fe0750e5 BF |
2345 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2346 | { | |
2347 | kfree(oo->oo_owner.so_owner.data); | |
2348 | kmem_cache_free(openowner_slab, oo); | |
2349 | } | |
2350 | ||
2351 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2352 | { |
fe0750e5 BF |
2353 | kfree(lo->lo_owner.so_owner.data); |
2354 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2355 | } |
2356 | ||
ff194bd9 | 2357 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2358 | { |
ff194bd9 BF |
2359 | rp->rp_status = nfserr_serverfault; |
2360 | rp->rp_buflen = 0; | |
2361 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2362 | } |
2363 | ||
fe0750e5 | 2364 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2365 | { |
1da177e4 | 2366 | struct nfs4_stateowner *sop; |
1da177e4 | 2367 | |
fe0750e5 | 2368 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2369 | if (!sop) |
2370 | return NULL; | |
2371 | ||
2372 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2373 | if (!sop->so_owner.data) { | |
fe0750e5 | 2374 | kmem_cache_free(slab, sop); |
1da177e4 | 2375 | return NULL; |
ff194bd9 BF |
2376 | } |
2377 | sop->so_owner.len = owner->len; | |
2378 | ||
ea1da636 | 2379 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2380 | sop->so_client = clp; |
2381 | init_nfs4_replay(&sop->so_replay); | |
2382 | return sop; | |
2383 | } | |
2384 | ||
fe0750e5 | 2385 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2386 | { |
16bfdaaf | 2387 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2388 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2389 | } |
2390 | ||
fe0750e5 | 2391 | static struct nfs4_openowner * |
ff194bd9 | 2392 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2393 | struct nfs4_openowner *oo; |
ff194bd9 | 2394 | |
fe0750e5 BF |
2395 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2396 | if (!oo) | |
ff194bd9 | 2397 | return NULL; |
fe0750e5 BF |
2398 | oo->oo_owner.so_is_open_owner = 1; |
2399 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2400 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2401 | oo->oo_time = 0; |
38c387b5 | 2402 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2403 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2404 | hash_openowner(oo, clp, strhashval); | |
2405 | return oo; | |
1da177e4 LT |
2406 | } |
2407 | ||
996e0938 | 2408 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2409 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2410 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2411 | |
996e0938 | 2412 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2413 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2414 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2415 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2416 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2417 | get_nfs4_file(fp); |
1da177e4 | 2418 | stp->st_file = fp; |
1da177e4 LT |
2419 | stp->st_access_bmap = 0; |
2420 | stp->st_deny_bmap = 0; | |
b6d2f1ca | 2421 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1da177e4 | 2422 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2423 | stp->st_openstp = NULL; |
1da177e4 LT |
2424 | } |
2425 | ||
fd39ca9a | 2426 | static void |
fe0750e5 | 2427 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2428 | { |
fe0750e5 | 2429 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2430 | |
fe0750e5 BF |
2431 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2432 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2433 | } |
2434 | ||
1da177e4 | 2435 | static int |
599e0a22 BF |
2436 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2437 | clientid_t *clid) | |
2438 | { | |
2439 | return (sop->so_owner.len == owner->len) && | |
2440 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2441 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2442 | } |
2443 | ||
fe0750e5 | 2444 | static struct nfs4_openowner * |
1da177e4 LT |
2445 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2446 | { | |
a50d2ad1 BF |
2447 | struct nfs4_stateowner *so; |
2448 | struct nfs4_openowner *oo; | |
1da177e4 | 2449 | |
16bfdaaf BF |
2450 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2451 | if (!so->so_is_open_owner) | |
2452 | continue; | |
a50d2ad1 BF |
2453 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2454 | oo = openowner(so); | |
2455 | renew_client(oo->oo_owner.so_client); | |
2456 | return oo; | |
2457 | } | |
1da177e4 LT |
2458 | } |
2459 | return NULL; | |
2460 | } | |
2461 | ||
2462 | /* search file_hashtbl[] for file */ | |
2463 | static struct nfs4_file * | |
2464 | find_file(struct inode *ino) | |
2465 | { | |
2466 | unsigned int hashval = file_hashval(ino); | |
2467 | struct nfs4_file *fp; | |
2468 | ||
8b671b80 | 2469 | spin_lock(&recall_lock); |
1da177e4 | 2470 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2471 | if (fp->fi_inode == ino) { |
2472 | get_nfs4_file(fp); | |
8b671b80 | 2473 | spin_unlock(&recall_lock); |
1da177e4 | 2474 | return fp; |
13cd2184 | 2475 | } |
1da177e4 | 2476 | } |
8b671b80 | 2477 | spin_unlock(&recall_lock); |
1da177e4 LT |
2478 | return NULL; |
2479 | } | |
2480 | ||
1da177e4 LT |
2481 | /* |
2482 | * Called to check deny when READ with all zero stateid or | |
2483 | * WRITE with all zero or all one stateid | |
2484 | */ | |
b37ad28b | 2485 | static __be32 |
1da177e4 LT |
2486 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2487 | { | |
2488 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2489 | struct nfs4_file *fp; | |
dcef0413 | 2490 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2491 | __be32 ret; |
1da177e4 LT |
2492 | |
2493 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2494 | ||
2495 | fp = find_file(ino); | |
13cd2184 N |
2496 | if (!fp) |
2497 | return nfs_ok; | |
b700949b | 2498 | ret = nfserr_locked; |
1da177e4 | 2499 | /* Search for conflicting share reservations */ |
13cd2184 N |
2500 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2501 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2502 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2503 | goto out; | |
1da177e4 | 2504 | } |
13cd2184 N |
2505 | ret = nfs_ok; |
2506 | out: | |
2507 | put_nfs4_file(fp); | |
2508 | return ret; | |
1da177e4 LT |
2509 | } |
2510 | ||
6b57d9c8 | 2511 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2512 | { |
1da177e4 LT |
2513 | /* We're assuming the state code never drops its reference |
2514 | * without first removing the lease. Since we're in this lease | |
2515 | * callback (and since the lease code is serialized by the kernel | |
2516 | * lock) we know the server hasn't removed the lease yet, we know | |
2517 | * it's safe to take a reference: */ | |
2518 | atomic_inc(&dp->dl_count); | |
2519 | ||
1da177e4 | 2520 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2521 | |
460781b5 | 2522 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2523 | dp->dl_time = get_seconds(); |
2524 | ||
6b57d9c8 BF |
2525 | nfsd4_cb_recall(dp); |
2526 | } | |
2527 | ||
acfdf5c3 | 2528 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2529 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2530 | { | |
acfdf5c3 BF |
2531 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2532 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2533 | |
acfdf5c3 BF |
2534 | BUG_ON(!fp); |
2535 | /* We assume break_lease is only called once per lease: */ | |
2536 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2537 | /* |
2538 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2539 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2540 | * in time: |
0272e1fd BF |
2541 | */ |
2542 | fl->fl_break_time = 0; | |
1da177e4 | 2543 | |
5d926e8c | 2544 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2545 | fp->fi_had_conflict = true; |
2546 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2547 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2548 | spin_unlock(&recall_lock); |
1da177e4 LT |
2549 | } |
2550 | ||
1da177e4 LT |
2551 | static |
2552 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2553 | { | |
2554 | if (arg & F_UNLCK) | |
2555 | return lease_modify(onlist, arg); | |
2556 | else | |
2557 | return -EAGAIN; | |
2558 | } | |
2559 | ||
7b021967 | 2560 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2561 | .lm_break = nfsd_break_deleg_cb, |
2562 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2563 | }; |
2564 | ||
7a8711c9 BF |
2565 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2566 | { | |
2567 | if (nfsd4_has_session(cstate)) | |
2568 | return nfs_ok; | |
2569 | if (seqid == so->so_seqid - 1) | |
2570 | return nfserr_replay_me; | |
2571 | if (seqid == so->so_seqid) | |
2572 | return nfs_ok; | |
2573 | return nfserr_bad_seqid; | |
2574 | } | |
1da177e4 | 2575 | |
b37ad28b | 2576 | __be32 |
6668958f AA |
2577 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2578 | struct nfsd4_open *open) | |
1da177e4 | 2579 | { |
1da177e4 LT |
2580 | clientid_t *clientid = &open->op_clientid; |
2581 | struct nfs4_client *clp = NULL; | |
2582 | unsigned int strhashval; | |
fe0750e5 | 2583 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2584 | __be32 status; |
1da177e4 | 2585 | |
1da177e4 LT |
2586 | if (STALE_CLIENTID(&open->op_clientid)) |
2587 | return nfserr_stale_clientid; | |
32513b40 BF |
2588 | /* |
2589 | * In case we need it later, after we've already created the | |
2590 | * file and don't want to risk a further failure: | |
2591 | */ | |
2592 | open->op_file = nfsd4_alloc_file(); | |
2593 | if (open->op_file == NULL) | |
2594 | return nfserr_jukebox; | |
1da177e4 | 2595 | |
16bfdaaf | 2596 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2597 | oo = find_openstateowner_str(strhashval, open); |
2598 | open->op_openowner = oo; | |
2599 | if (!oo) { | |
1da177e4 LT |
2600 | clp = find_confirmed_client(clientid); |
2601 | if (clp == NULL) | |
0f442aa2 | 2602 | return nfserr_expired; |
bcf130f9 | 2603 | goto new_owner; |
1da177e4 | 2604 | } |
dad1c067 | 2605 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2606 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2607 | clp = oo->oo_owner.so_client; |
2608 | release_openowner(oo); | |
2609 | open->op_openowner = NULL; | |
bcf130f9 | 2610 | goto new_owner; |
0f442aa2 | 2611 | } |
4cdc951b BF |
2612 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2613 | if (status) | |
2614 | return status; | |
2615 | clp = oo->oo_owner.so_client; | |
2616 | goto alloc_stateid; | |
bcf130f9 BF |
2617 | new_owner: |
2618 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2619 | if (oo == NULL) | |
2620 | return nfserr_jukebox; | |
2621 | open->op_openowner = oo; | |
4cdc951b BF |
2622 | alloc_stateid: |
2623 | open->op_stp = nfs4_alloc_stateid(clp); | |
2624 | if (!open->op_stp) | |
2625 | return nfserr_jukebox; | |
0f442aa2 | 2626 | return nfs_ok; |
1da177e4 LT |
2627 | } |
2628 | ||
b37ad28b | 2629 | static inline __be32 |
4a6e43e6 N |
2630 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2631 | { | |
2632 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2633 | return nfserr_openmode; | |
2634 | else | |
2635 | return nfs_ok; | |
2636 | } | |
2637 | ||
f459e453 | 2638 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2639 | { |
f459e453 | 2640 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2641 | |
f459e453 | 2642 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2643 | } |
2644 | ||
38c2f4b1 | 2645 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2646 | { |
f459e453 | 2647 | struct nfs4_stid *ret; |
24a0111e | 2648 | |
38c2f4b1 | 2649 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2650 | if (!ret) |
2651 | return NULL; | |
2652 | return delegstateid(ret); | |
24a0111e BF |
2653 | } |
2654 | ||
8b289b2c BF |
2655 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2656 | { | |
2657 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2658 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2659 | } | |
2660 | ||
b37ad28b | 2661 | static __be32 |
38c2f4b1 | 2662 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2663 | struct nfs4_delegation **dp) |
2664 | { | |
2665 | int flags; | |
b37ad28b | 2666 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2667 | |
38c2f4b1 | 2668 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2669 | if (*dp == NULL) |
c44c5eeb | 2670 | goto out; |
24a0111e | 2671 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2672 | status = nfs4_check_delegmode(*dp, flags); |
2673 | if (status) | |
2674 | *dp = NULL; | |
c44c5eeb | 2675 | out: |
8b289b2c | 2676 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2677 | return nfs_ok; |
2678 | if (status) | |
2679 | return status; | |
dad1c067 | 2680 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2681 | return nfs_ok; |
567d9829 N |
2682 | } |
2683 | ||
b37ad28b | 2684 | static __be32 |
dcef0413 | 2685 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2686 | { |
dcef0413 | 2687 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2688 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2689 | |
8beefa24 | 2690 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2691 | /* ignore lock owners */ |
2692 | if (local->st_stateowner->so_is_open_owner == 0) | |
2693 | continue; | |
2694 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2695 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2696 | *stpp = local; |
2697 | /* check for conflicting share reservations */ | |
2698 | if (!test_share(local, open)) | |
77eaae8d | 2699 | return nfserr_share_denied; |
1da177e4 | 2700 | } |
77eaae8d | 2701 | return nfs_ok; |
1da177e4 LT |
2702 | } |
2703 | ||
996e0938 BF |
2704 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2705 | { | |
2706 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2707 | } |
2708 | ||
21fb4016 BF |
2709 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2710 | { | |
2711 | int flags = 0; | |
2712 | ||
2713 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2714 | flags |= NFSD_MAY_READ; | |
2715 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2716 | flags |= NFSD_MAY_WRITE; | |
2717 | return flags; | |
2718 | } | |
2719 | ||
0c12eaff CB |
2720 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2721 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2722 | { |
2723 | __be32 status; | |
0c12eaff CB |
2724 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2725 | int access = nfs4_access_to_access(open->op_share_access); | |
2726 | ||
f9d7562f BF |
2727 | if (!fp->fi_fds[oflag]) { |
2728 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2729 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2730 | if (status) |
2731 | return status; | |
2732 | } | |
2733 | nfs4_file_get_access(fp, oflag); | |
2734 | ||
2735 | return nfs_ok; | |
2736 | } | |
2737 | ||
b37ad28b | 2738 | static inline __be32 |
1da177e4 LT |
2739 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2740 | struct nfsd4_open *open) | |
2741 | { | |
2742 | struct iattr iattr = { | |
2743 | .ia_valid = ATTR_SIZE, | |
2744 | .ia_size = 0, | |
2745 | }; | |
2746 | if (!open->op_truncate) | |
2747 | return 0; | |
2748 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2749 | return nfserr_inval; |
1da177e4 LT |
2750 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2751 | } | |
2752 | ||
b37ad28b | 2753 | static __be32 |
dcef0413 | 2754 | 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 | 2755 | { |
b6d2f1ca | 2756 | u32 op_share_access = open->op_share_access; |
7d947842 | 2757 | bool new_access; |
b37ad28b | 2758 | __be32 status; |
1da177e4 | 2759 | |
7d947842 | 2760 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2761 | if (new_access) { |
0c12eaff | 2762 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2763 | if (status) |
2764 | return status; | |
6c26d08f | 2765 | } |
1da177e4 LT |
2766 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2767 | if (status) { | |
f9d7562f | 2768 | if (new_access) { |
f197c271 | 2769 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2770 | nfs4_file_put_access(fp, oflag); |
2771 | } | |
1da177e4 LT |
2772 | return status; |
2773 | } | |
2774 | /* remember the open */ | |
24a0111e | 2775 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2776 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2777 | |
2778 | return nfs_ok; | |
2779 | } | |
2780 | ||
2781 | ||
1da177e4 | 2782 | static void |
37515177 | 2783 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2784 | { |
dad1c067 | 2785 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2786 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2787 | } |
2788 | ||
14a24e99 BF |
2789 | /* Should we give out recallable state?: */ |
2790 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2791 | { | |
2792 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2793 | return true; | |
2794 | /* | |
2795 | * In the sessions case, since we don't have to establish a | |
2796 | * separate connection for callbacks, we assume it's OK | |
2797 | * until we hear otherwise: | |
2798 | */ | |
2799 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2800 | } | |
2801 | ||
22d38c4c BF |
2802 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2803 | { | |
2804 | struct file_lock *fl; | |
2805 | ||
2806 | fl = locks_alloc_lock(); | |
2807 | if (!fl) | |
2808 | return NULL; | |
2809 | locks_init_lock(fl); | |
2810 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2811 | fl->fl_flags = FL_LEASE; | |
2812 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2813 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2814 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2815 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2816 | return fl; |
2817 | } | |
2818 | ||
edab9782 BF |
2819 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2820 | { | |
acfdf5c3 | 2821 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2822 | struct file_lock *fl; |
2823 | int status; | |
2824 | ||
2825 | fl = nfs4_alloc_init_lease(dp, flag); | |
2826 | if (!fl) | |
2827 | return -ENOMEM; | |
acfdf5c3 | 2828 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2829 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2830 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2831 | if (status) { |
acfdf5c3 | 2832 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2833 | locks_free_lock(fl); |
2834 | return -ENOMEM; | |
2835 | } | |
acfdf5c3 BF |
2836 | fp->fi_lease = fl; |
2837 | fp->fi_deleg_file = fl->fl_file; | |
2838 | get_file(fp->fi_deleg_file); | |
2839 | atomic_set(&fp->fi_delegees, 1); | |
2840 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2841 | return 0; | |
2842 | } | |
2843 | ||
2844 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2845 | { | |
2846 | struct nfs4_file *fp = dp->dl_file; | |
2847 | ||
2848 | if (!fp->fi_lease) | |
2849 | return nfs4_setlease(dp, flag); | |
2850 | spin_lock(&recall_lock); | |
2851 | if (fp->fi_had_conflict) { | |
2852 | spin_unlock(&recall_lock); | |
2853 | return -EAGAIN; | |
2854 | } | |
2855 | atomic_inc(&fp->fi_delegees); | |
2856 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2857 | spin_unlock(&recall_lock); | |
2a74aba7 | 2858 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2859 | return 0; |
2860 | } | |
2861 | ||
1da177e4 LT |
2862 | /* |
2863 | * Attempt to hand out a delegation. | |
2864 | */ | |
2865 | static void | |
dcef0413 | 2866 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2867 | { |
2868 | struct nfs4_delegation *dp; | |
fe0750e5 | 2869 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2870 | int cb_up; |
1da177e4 LT |
2871 | int status, flag = 0; |
2872 | ||
fe0750e5 | 2873 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2874 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2875 | open->op_recall = 0; |
2876 | switch (open->op_claim_type) { | |
2877 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2878 | if (!cb_up) |
7b190fec N |
2879 | open->op_recall = 1; |
2880 | flag = open->op_delegate_type; | |
2881 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2882 | goto out; | |
2883 | break; | |
2884 | case NFS4_OPEN_CLAIM_NULL: | |
2885 | /* Let's not give out any delegations till everyone's | |
2886 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2887 | if (locks_in_grace()) |
7b190fec | 2888 | goto out; |
dad1c067 | 2889 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2890 | goto out; |
2891 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2892 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2893 | else | |
2894 | flag = NFS4_OPEN_DELEGATE_READ; | |
2895 | break; | |
2896 | default: | |
2897 | goto out; | |
2898 | } | |
1da177e4 | 2899 | |
fe0750e5 | 2900 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2901 | if (dp == NULL) |
2902 | goto out_no_deleg; | |
acfdf5c3 | 2903 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2904 | if (status) |
dd239cc0 | 2905 | goto out_free; |
1da177e4 | 2906 | |
d5477a8d | 2907 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2908 | |
8c10cbdb | 2909 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2910 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2911 | out: |
7b190fec N |
2912 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2913 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2914 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2915 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2916 | open->op_delegate_type = flag; |
dd239cc0 BF |
2917 | return; |
2918 | out_free: | |
acfdf5c3 | 2919 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2920 | out_no_deleg: |
2921 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2922 | goto out; | |
1da177e4 LT |
2923 | } |
2924 | ||
2925 | /* | |
2926 | * called with nfs4_lock_state() held. | |
2927 | */ | |
b37ad28b | 2928 | __be32 |
1da177e4 LT |
2929 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2930 | { | |
6668958f | 2931 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2932 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2933 | struct nfs4_file *fp = NULL; |
2934 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2935 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2936 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2937 | __be32 status; |
1da177e4 | 2938 | |
1da177e4 LT |
2939 | /* |
2940 | * Lookup file; if found, lookup stateid and check open request, | |
2941 | * and check for delegations in the process of being recalled. | |
2942 | * If not found, create the nfs4_file struct | |
2943 | */ | |
2944 | fp = find_file(ino); | |
2945 | if (fp) { | |
2946 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2947 | goto out; | |
38c2f4b1 | 2948 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
2949 | if (status) |
2950 | goto out; | |
1da177e4 | 2951 | } else { |
c44c5eeb | 2952 | status = nfserr_bad_stateid; |
8b289b2c | 2953 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 2954 | goto out; |
3e772463 | 2955 | status = nfserr_jukebox; |
32513b40 BF |
2956 | fp = open->op_file; |
2957 | open->op_file = NULL; | |
2958 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
2959 | } |
2960 | ||
2961 | /* | |
2962 | * OPEN the file, or upgrade an existing OPEN. | |
2963 | * If truncate fails, the OPEN fails. | |
2964 | */ | |
2965 | if (stp) { | |
2966 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2967 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2968 | if (status) |
2969 | goto out; | |
2970 | } else { | |
4cdc951b | 2971 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 2972 | if (status) |
1da177e4 | 2973 | goto out; |
4cdc951b BF |
2974 | stp = open->op_stp; |
2975 | open->op_stp = NULL; | |
996e0938 | 2976 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
2977 | status = nfsd4_truncate(rqstp, current_fh, open); |
2978 | if (status) { | |
2283963f | 2979 | release_open_stateid(stp); |
1da177e4 LT |
2980 | goto out; |
2981 | } | |
2982 | } | |
dcef0413 BF |
2983 | update_stateid(&stp->st_stid.sc_stateid); |
2984 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2985 | |
4dc6ec00 | 2986 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2987 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2988 | |
1da177e4 LT |
2989 | /* |
2990 | * Attempt to hand out a delegation. No error return, because the | |
2991 | * OPEN succeeds even if we fail. | |
2992 | */ | |
2993 | nfs4_open_delegation(current_fh, open, stp); | |
2994 | ||
2995 | status = nfs_ok; | |
2996 | ||
8c10cbdb | 2997 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2998 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2999 | out: |
13cd2184 N |
3000 | if (fp) |
3001 | put_nfs4_file(fp); | |
37515177 N |
3002 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
3003 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
3004 | /* |
3005 | * To finish the open response, we just need to set the rflags. | |
3006 | */ | |
3007 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3008 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3009 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3010 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3011 | ||
3012 | return status; | |
3013 | } | |
3014 | ||
d29b20cd BF |
3015 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3016 | { | |
3017 | if (open->op_openowner) { | |
3018 | struct nfs4_openowner *oo = open->op_openowner; | |
3019 | ||
3020 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3021 | list_del_init(&oo->oo_close_lru); | |
3022 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3023 | if (status) { | |
3024 | release_openowner(oo); | |
3025 | open->op_openowner = NULL; | |
3026 | } else | |
3027 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3028 | } | |
3029 | } | |
32513b40 BF |
3030 | if (open->op_file) |
3031 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3032 | if (open->op_stp) |
3033 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3034 | } |
3035 | ||
b37ad28b | 3036 | __be32 |
b591480b BF |
3037 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3038 | clientid_t *clid) | |
1da177e4 LT |
3039 | { |
3040 | struct nfs4_client *clp; | |
b37ad28b | 3041 | __be32 status; |
1da177e4 LT |
3042 | |
3043 | nfs4_lock_state(); | |
3044 | dprintk("process_renew(%08x/%08x): starting\n", | |
3045 | clid->cl_boot, clid->cl_id); | |
3046 | status = nfserr_stale_clientid; | |
3047 | if (STALE_CLIENTID(clid)) | |
3048 | goto out; | |
3049 | clp = find_confirmed_client(clid); | |
3050 | status = nfserr_expired; | |
3051 | if (clp == NULL) { | |
3052 | /* We assume the client took too long to RENEW. */ | |
3053 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3054 | goto out; | |
3055 | } | |
1da177e4 | 3056 | status = nfserr_cb_path_down; |
ea1da636 | 3057 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3058 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3059 | goto out; |
3060 | status = nfs_ok; | |
3061 | out: | |
3062 | nfs4_unlock_state(); | |
3063 | return status; | |
3064 | } | |
3065 | ||
c47d832b | 3066 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3067 | }; |
3068 | ||
a76b4319 | 3069 | static void |
af558e33 | 3070 | nfsd4_end_grace(void) |
a76b4319 N |
3071 | { |
3072 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 3073 | nfsd4_recdir_purge_old(); |
af558e33 | 3074 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3075 | /* |
3076 | * Now that every NFSv4 client has had the chance to recover and | |
3077 | * to see the (possibly new, possibly shorter) lease time, we | |
3078 | * can safely set the next grace time to the current lease time: | |
3079 | */ | |
3080 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3081 | } |
3082 | ||
fd39ca9a | 3083 | static time_t |
1da177e4 LT |
3084 | nfs4_laundromat(void) |
3085 | { | |
3086 | struct nfs4_client *clp; | |
fe0750e5 | 3087 | struct nfs4_openowner *oo; |
1da177e4 LT |
3088 | struct nfs4_delegation *dp; |
3089 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3090 | time_t cutoff = get_seconds() - nfsd4_lease; |
3091 | time_t t, clientid_val = nfsd4_lease; | |
3092 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3093 | |
3094 | nfs4_lock_state(); | |
3095 | ||
3096 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3097 | if (locks_in_grace()) |
3098 | nfsd4_end_grace(); | |
36acb66b BH |
3099 | INIT_LIST_HEAD(&reaplist); |
3100 | spin_lock(&client_lock); | |
1da177e4 LT |
3101 | list_for_each_safe(pos, next, &client_lru) { |
3102 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3103 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3104 | t = clp->cl_time - cutoff; | |
3105 | if (clientid_val > t) | |
3106 | clientid_val = t; | |
3107 | break; | |
3108 | } | |
d7682988 BH |
3109 | if (atomic_read(&clp->cl_refcount)) { |
3110 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3111 | clp->cl_clientid.cl_id); | |
3112 | continue; | |
3113 | } | |
3114 | unhash_client_locked(clp); | |
3115 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3116 | } |
3117 | spin_unlock(&client_lock); | |
3118 | list_for_each_safe(pos, next, &reaplist) { | |
3119 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3120 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3121 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3122 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3123 | expire_client(clp); |
3124 | } | |
1da177e4 LT |
3125 | spin_lock(&recall_lock); |
3126 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3127 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3128 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3129 | u = dp->dl_time - cutoff; | |
3130 | if (test_val > u) | |
3131 | test_val = u; | |
3132 | break; | |
3133 | } | |
1da177e4 LT |
3134 | list_move(&dp->dl_recall_lru, &reaplist); |
3135 | } | |
3136 | spin_unlock(&recall_lock); | |
3137 | list_for_each_safe(pos, next, &reaplist) { | |
3138 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3139 | unhash_delegation(dp); |
3140 | } | |
cf07d2ea | 3141 | test_val = nfsd4_lease; |
1da177e4 | 3142 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3143 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3144 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3145 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3146 | if (test_val > u) |
3147 | test_val = u; | |
3148 | break; | |
3149 | } | |
fe0750e5 | 3150 | release_openowner(oo); |
1da177e4 LT |
3151 | } |
3152 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3153 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3154 | nfs4_unlock_state(); | |
3155 | return clientid_val; | |
3156 | } | |
3157 | ||
a254b246 HH |
3158 | static struct workqueue_struct *laundry_wq; |
3159 | static void laundromat_main(struct work_struct *); | |
3160 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3161 | ||
3162 | static void | |
c4028958 | 3163 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3164 | { |
3165 | time_t t; | |
3166 | ||
3167 | t = nfs4_laundromat(); | |
3168 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3169 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3170 | } |
3171 | ||
f7a4d872 | 3172 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3173 | { |
f7a4d872 BF |
3174 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3175 | return nfserr_bad_stateid; | |
3176 | return nfs_ok; | |
1da177e4 LT |
3177 | } |
3178 | ||
3179 | static int | |
3180 | STALE_STATEID(stateid_t *stateid) | |
3181 | { | |
d3b313a4 | 3182 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3183 | return 0; |
3184 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3185 | STATEID_VAL(stateid)); |
e4e83ea4 | 3186 | return 1; |
1da177e4 LT |
3187 | } |
3188 | ||
3189 | static inline int | |
3190 | access_permit_read(unsigned long access_bmap) | |
3191 | { | |
3192 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3193 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3194 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3195 | } | |
3196 | ||
3197 | static inline int | |
3198 | access_permit_write(unsigned long access_bmap) | |
3199 | { | |
3200 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3201 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3202 | } | |
3203 | ||
3204 | static | |
dcef0413 | 3205 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3206 | { |
b37ad28b | 3207 | __be32 status = nfserr_openmode; |
1da177e4 | 3208 | |
02921914 BF |
3209 | /* For lock stateid's, we test the parent open, not the lock: */ |
3210 | if (stp->st_openstp) | |
3211 | stp = stp->st_openstp; | |
1da177e4 LT |
3212 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3213 | goto out; | |
3214 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3215 | goto out; | |
3216 | status = nfs_ok; | |
3217 | out: | |
3218 | return status; | |
3219 | } | |
3220 | ||
b37ad28b | 3221 | static inline __be32 |
1da177e4 LT |
3222 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3223 | { | |
203a8c8e | 3224 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3225 | return nfs_ok; |
af558e33 | 3226 | else if (locks_in_grace()) { |
25985edc | 3227 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3228 | * conflicting state; so we must wait out the grace period. */ |
3229 | return nfserr_grace; | |
3230 | } else if (flags & WR_STATE) | |
3231 | return nfs4_share_conflict(current_fh, | |
3232 | NFS4_SHARE_DENY_WRITE); | |
3233 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3234 | return nfs4_share_conflict(current_fh, | |
3235 | NFS4_SHARE_DENY_READ); | |
3236 | } | |
3237 | ||
3238 | /* | |
3239 | * Allow READ/WRITE during grace period on recovered state only for files | |
3240 | * that are not able to provide mandatory locking. | |
3241 | */ | |
3242 | static inline int | |
18f82731 | 3243 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3244 | { |
203a8c8e | 3245 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3246 | } |
3247 | ||
81b82965 BF |
3248 | /* Returns true iff a is later than b: */ |
3249 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3250 | { | |
3251 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3252 | } | |
3253 | ||
28dde241 | 3254 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3255 | { |
6668958f AA |
3256 | /* |
3257 | * When sessions are used the stateid generation number is ignored | |
3258 | * when it is zero. | |
3259 | */ | |
28dde241 | 3260 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3261 | return nfs_ok; |
3262 | ||
3263 | if (in->si_generation == ref->si_generation) | |
3264 | return nfs_ok; | |
6668958f | 3265 | |
0836f587 | 3266 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3267 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3268 | return nfserr_bad_stateid; |
3269 | /* | |
81b82965 BF |
3270 | * However, we could see a stateid from the past, even from a |
3271 | * non-buggy client. For example, if the client sends a lock | |
3272 | * while some IO is outstanding, the lock may bump si_generation | |
3273 | * while the IO is still in flight. The client could avoid that | |
3274 | * situation by waiting for responses on all the IO requests, | |
3275 | * but better performance may result in retrying IO that | |
3276 | * receives an old_stateid error if requests are rarely | |
3277 | * reordered in flight: | |
0836f587 | 3278 | */ |
81b82965 | 3279 | return nfserr_old_stateid; |
0836f587 BF |
3280 | } |
3281 | ||
38c2f4b1 | 3282 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3283 | { |
97b7e3b6 BF |
3284 | struct nfs4_stid *s; |
3285 | struct nfs4_ol_stateid *ols; | |
3286 | __be32 status; | |
17456804 BS |
3287 | |
3288 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3289 | return nfserr_stale_stateid; |
17456804 | 3290 | |
38c2f4b1 | 3291 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3292 | if (!s) |
3293 | return nfserr_stale_stateid; | |
36279ac1 | 3294 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3295 | if (status) |
97b7e3b6 BF |
3296 | return status; |
3297 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3298 | return nfs_ok; | |
3299 | ols = openlockstateid(s); | |
3300 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3301 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3302 | return nfserr_bad_stateid; |
3303 | return nfs_ok; | |
17456804 BS |
3304 | } |
3305 | ||
38c2f4b1 BF |
3306 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3307 | { | |
3308 | struct nfs4_client *cl; | |
3309 | ||
3310 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3311 | return nfserr_bad_stateid; | |
3312 | if (STALE_STATEID(stateid)) | |
3313 | return nfserr_stale_stateid; | |
3314 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3315 | if (!cl) | |
3316 | return nfserr_expired; | |
3317 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3318 | if (!*s) | |
3319 | return nfserr_bad_stateid; | |
3320 | return nfs_ok; | |
3321 | ||
3322 | } | |
3323 | ||
1da177e4 LT |
3324 | /* |
3325 | * Checks for stateid operations | |
3326 | */ | |
b37ad28b | 3327 | __be32 |
dd453dfd BH |
3328 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3329 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3330 | { |
69064a27 | 3331 | struct nfs4_stid *s; |
dcef0413 | 3332 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3333 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3334 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3335 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3336 | __be32 status; |
1da177e4 | 3337 | |
1da177e4 LT |
3338 | if (filpp) |
3339 | *filpp = NULL; | |
3340 | ||
18f82731 | 3341 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3342 | return nfserr_grace; |
3343 | ||
3344 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3345 | return check_special_stateids(current_fh, stateid, flags); | |
3346 | ||
38c2f4b1 BF |
3347 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3348 | if (status) | |
3349 | return status; | |
69064a27 BF |
3350 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3351 | if (status) | |
3352 | goto out; | |
f7a4d872 BF |
3353 | switch (s->sc_type) { |
3354 | case NFS4_DELEG_STID: | |
69064a27 | 3355 | dp = delegstateid(s); |
dc9bf700 BF |
3356 | status = nfs4_check_delegmode(dp, flags); |
3357 | if (status) | |
3358 | goto out; | |
43b0178e | 3359 | if (filpp) { |
acfdf5c3 | 3360 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3361 | BUG_ON(!*filpp); |
3362 | } | |
f7a4d872 BF |
3363 | break; |
3364 | case NFS4_OPEN_STID: | |
3365 | case NFS4_LOCK_STID: | |
69064a27 | 3366 | stp = openlockstateid(s); |
f7a4d872 BF |
3367 | status = nfs4_check_fh(current_fh, stp); |
3368 | if (status) | |
1da177e4 | 3369 | goto out; |
fe0750e5 | 3370 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3371 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3372 | goto out; |
a4455be0 BF |
3373 | status = nfs4_check_openmode(stp, flags); |
3374 | if (status) | |
1da177e4 | 3375 | goto out; |
f9d7562f BF |
3376 | if (filpp) { |
3377 | if (flags & RD_STATE) | |
3378 | *filpp = find_readable_file(stp->st_file); | |
3379 | else | |
3380 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3381 | } |
f7a4d872 BF |
3382 | break; |
3383 | default: | |
3384 | return nfserr_bad_stateid; | |
1da177e4 LT |
3385 | } |
3386 | status = nfs_ok; | |
3387 | out: | |
3388 | return status; | |
3389 | } | |
3390 | ||
e1ca12df | 3391 | static __be32 |
dcef0413 | 3392 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3393 | { |
fe0750e5 | 3394 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3395 | return nfserr_locks_held; |
3396 | release_lock_stateid(stp); | |
3397 | return nfs_ok; | |
3398 | } | |
3399 | ||
17456804 BS |
3400 | /* |
3401 | * Test if the stateid is valid | |
3402 | */ | |
3403 | __be32 | |
3404 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3405 | struct nfsd4_test_stateid *test_stateid) | |
3406 | { | |
36279ac1 | 3407 | /* real work is done during encoding */ |
17456804 BS |
3408 | return nfs_ok; |
3409 | } | |
3410 | ||
e1ca12df BS |
3411 | __be32 |
3412 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3413 | struct nfsd4_free_stateid *free_stateid) | |
3414 | { | |
3415 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3416 | struct nfs4_stid *s; |
38c2f4b1 | 3417 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3418 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3419 | |
3420 | nfs4_lock_state(); | |
38c2f4b1 | 3421 | s = find_stateid(cl, stateid); |
2da1cec7 | 3422 | if (!s) |
81b82965 | 3423 | goto out; |
2da1cec7 BF |
3424 | switch (s->sc_type) { |
3425 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3426 | ret = nfserr_locks_held; |
3427 | goto out; | |
2da1cec7 BF |
3428 | case NFS4_OPEN_STID: |
3429 | case NFS4_LOCK_STID: | |
3430 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3431 | if (ret) | |
3432 | goto out; | |
3433 | if (s->sc_type == NFS4_LOCK_STID) | |
3434 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3435 | else | |
3436 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3437 | break; |
3438 | default: | |
3439 | ret = nfserr_bad_stateid; | |
e1ca12df | 3440 | } |
e1ca12df BS |
3441 | out: |
3442 | nfs4_unlock_state(); | |
3443 | return ret; | |
3444 | } | |
3445 | ||
4c4cd222 N |
3446 | static inline int |
3447 | setlkflg (int type) | |
3448 | { | |
3449 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3450 | RD_STATE : WR_STATE; | |
3451 | } | |
1da177e4 | 3452 | |
dcef0413 | 3453 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3454 | { |
3455 | struct svc_fh *current_fh = &cstate->current_fh; | |
3456 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3457 | __be32 status; | |
3458 | ||
c0a5d93e BF |
3459 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3460 | if (status) | |
3461 | return status; | |
f7a4d872 BF |
3462 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3463 | /* | |
3464 | * "Closed" stateid's exist *only* to return | |
3465 | * nfserr_replay_me from the previous step. | |
3466 | */ | |
3467 | return nfserr_bad_stateid; | |
3468 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3469 | if (status) | |
3470 | return status; | |
3471 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3472 | } |
3473 | ||
1da177e4 LT |
3474 | /* |
3475 | * Checks for sequence id mutating operations. | |
3476 | */ | |
b37ad28b | 3477 | static __be32 |
dd453dfd | 3478 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3479 | stateid_t *stateid, char typemask, |
dcef0413 | 3480 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3481 | { |
0836f587 | 3482 | __be32 status; |
38c2f4b1 | 3483 | struct nfs4_stid *s; |
1da177e4 | 3484 | |
8c10cbdb BH |
3485 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3486 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3487 | |
1da177e4 | 3488 | *stpp = NULL; |
38c2f4b1 | 3489 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3490 | if (status) |
3491 | return status; | |
38c2f4b1 | 3492 | *stpp = openlockstateid(s); |
c0a5d93e | 3493 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3494 | |
c0a5d93e BF |
3495 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3496 | } | |
39325bd0 | 3497 | |
dcef0413 | 3498 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3499 | { |
3500 | __be32 status; | |
3501 | struct nfs4_openowner *oo; | |
1da177e4 | 3502 | |
c0a5d93e | 3503 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3504 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3505 | if (status) |
3506 | return status; | |
c0a5d93e | 3507 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3508 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3509 | return nfserr_bad_stateid; |
3a4f98bb | 3510 | return nfs_ok; |
1da177e4 LT |
3511 | } |
3512 | ||
b37ad28b | 3513 | __be32 |
ca364317 | 3514 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3515 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3516 | { |
b37ad28b | 3517 | __be32 status; |
fe0750e5 | 3518 | struct nfs4_openowner *oo; |
dcef0413 | 3519 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3520 | |
3521 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3522 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3523 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3524 | |
ca364317 | 3525 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3526 | if (status) |
3527 | return status; | |
1da177e4 LT |
3528 | |
3529 | nfs4_lock_state(); | |
3530 | ||
9072d5c6 | 3531 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3532 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3533 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3534 | if (status) |
68b66e82 | 3535 | goto out; |
fe0750e5 | 3536 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3537 | status = nfserr_bad_stateid; |
dad1c067 | 3538 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3539 | goto out; |
dad1c067 | 3540 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3541 | update_stateid(&stp->st_stid.sc_stateid); |
3542 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3543 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3544 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3545 | |
fe0750e5 | 3546 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3547 | status = nfs_ok; |
1da177e4 | 3548 | out: |
5ec094c1 BF |
3549 | if (!cstate->replay_owner) |
3550 | nfs4_unlock_state(); | |
1da177e4 LT |
3551 | return status; |
3552 | } | |
3553 | ||
6409a5a6 | 3554 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3555 | { |
6409a5a6 BF |
3556 | if (!test_bit(access, &stp->st_access_bmap)) |
3557 | return; | |
3558 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
3559 | __clear_bit(access, &stp->st_access_bmap); | |
3560 | } | |
f197c271 | 3561 | |
6409a5a6 BF |
3562 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3563 | { | |
3564 | switch (to_access) { | |
3565 | case NFS4_SHARE_ACCESS_READ: | |
3566 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3567 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3568 | break; | |
3569 | case NFS4_SHARE_ACCESS_WRITE: | |
3570 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3571 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3572 | break; | |
3573 | case NFS4_SHARE_ACCESS_BOTH: | |
3574 | break; | |
3575 | default: | |
3576 | BUG(); | |
1da177e4 LT |
3577 | } |
3578 | } | |
3579 | ||
3580 | static void | |
3581 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3582 | { | |
3583 | int i; | |
3584 | for (i = 0; i < 4; i++) { | |
3585 | if ((i & deny) != i) | |
3586 | __clear_bit(i, bmap); | |
3587 | } | |
3588 | } | |
3589 | ||
b37ad28b | 3590 | __be32 |
ca364317 BF |
3591 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3592 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3593 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3594 | { |
b37ad28b | 3595 | __be32 status; |
dcef0413 | 3596 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3597 | |
3598 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3599 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3600 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3601 | |
c30e92df BF |
3602 | /* We don't yet support WANT bits: */ |
3603 | od->od_share_access &= NFS4_SHARE_ACCESS_MASK; | |
1da177e4 LT |
3604 | |
3605 | nfs4_lock_state(); | |
c0a5d93e BF |
3606 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3607 | &od->od_stateid, &stp); | |
9072d5c6 | 3608 | if (status) |
1da177e4 | 3609 | goto out; |
1da177e4 LT |
3610 | status = nfserr_inval; |
3611 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3612 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3613 | stp->st_access_bmap, od->od_share_access); | |
3614 | goto out; | |
3615 | } | |
3616 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3617 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3618 | stp->st_deny_bmap, od->od_share_deny); | |
3619 | goto out; | |
3620 | } | |
6409a5a6 | 3621 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3622 | |
1da177e4 LT |
3623 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3624 | ||
dcef0413 BF |
3625 | update_stateid(&stp->st_stid.sc_stateid); |
3626 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3627 | status = nfs_ok; |
3628 | out: | |
5ec094c1 BF |
3629 | if (!cstate->replay_owner) |
3630 | nfs4_unlock_state(); | |
1da177e4 LT |
3631 | return status; |
3632 | } | |
3633 | ||
38c387b5 BF |
3634 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3635 | { | |
3636 | struct nfs4_openowner *oo; | |
3637 | struct nfs4_ol_stateid *s; | |
3638 | ||
3639 | if (!so->so_is_open_owner) | |
3640 | return; | |
3641 | oo = openowner(so); | |
3642 | s = oo->oo_last_closed_stid; | |
3643 | if (!s) | |
3644 | return; | |
3645 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3646 | /* Release the last_closed_stid on the next seqid bump: */ | |
3647 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3648 | return; | |
3649 | } | |
3650 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3651 | release_last_closed_stateid(oo); |
3652 | } | |
3653 | ||
3654 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3655 | { | |
3656 | unhash_open_stateid(s); | |
3657 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3658 | } |
3659 | ||
1da177e4 LT |
3660 | /* |
3661 | * nfs4_unlock_state() called after encode | |
3662 | */ | |
b37ad28b | 3663 | __be32 |
ca364317 | 3664 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3665 | struct nfsd4_close *close) |
1da177e4 | 3666 | { |
b37ad28b | 3667 | __be32 status; |
fe0750e5 | 3668 | struct nfs4_openowner *oo; |
dcef0413 | 3669 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3670 | |
3671 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3672 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3673 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3674 | |
3675 | nfs4_lock_state(); | |
f7a4d872 BF |
3676 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3677 | &close->cl_stateid, | |
3678 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3679 | &stp); | |
9072d5c6 | 3680 | if (status) |
1da177e4 | 3681 | goto out; |
fe0750e5 | 3682 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3683 | status = nfs_ok; |
dcef0413 BF |
3684 | update_stateid(&stp->st_stid.sc_stateid); |
3685 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3686 | |
f7a4d872 | 3687 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3688 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3689 | |
3690 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3691 | * released by the laundromat service after the lease period | |
3692 | * to enable us to handle CLOSE replay | |
3693 | */ | |
fe0750e5 BF |
3694 | if (list_empty(&oo->oo_owner.so_stateids)) |
3695 | move_to_close_lru(oo); | |
1da177e4 | 3696 | out: |
5ec094c1 BF |
3697 | if (!cstate->replay_owner) |
3698 | nfs4_unlock_state(); | |
1da177e4 LT |
3699 | return status; |
3700 | } | |
3701 | ||
b37ad28b | 3702 | __be32 |
ca364317 BF |
3703 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3704 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3705 | { |
203a8c8e BF |
3706 | struct nfs4_delegation *dp; |
3707 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3708 | struct nfs4_stid *s; |
203a8c8e | 3709 | struct inode *inode; |
b37ad28b | 3710 | __be32 status; |
1da177e4 | 3711 | |
ca364317 | 3712 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3713 | return status; |
3714 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3715 | |
3716 | nfs4_lock_state(); | |
38c2f4b1 BF |
3717 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3718 | if (status) | |
203a8c8e | 3719 | goto out; |
38c2f4b1 | 3720 | dp = delegstateid(s); |
d5477a8d | 3721 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3722 | if (status) |
3723 | goto out; | |
203a8c8e BF |
3724 | |
3725 | unhash_delegation(dp); | |
1da177e4 | 3726 | out: |
203a8c8e BF |
3727 | nfs4_unlock_state(); |
3728 | ||
1da177e4 LT |
3729 | return status; |
3730 | } | |
3731 | ||
3732 | ||
1da177e4 | 3733 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3734 | |
009673b4 BF |
3735 | #define LOCKOWNER_INO_HASH_BITS 8 |
3736 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3737 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3738 | |
87df4de8 BH |
3739 | static inline u64 |
3740 | end_offset(u64 start, u64 len) | |
3741 | { | |
3742 | u64 end; | |
3743 | ||
3744 | end = start + len; | |
3745 | return end >= start ? end: NFS4_MAX_UINT64; | |
3746 | } | |
3747 | ||
3748 | /* last octet in a range */ | |
3749 | static inline u64 | |
3750 | last_byte_offset(u64 start, u64 len) | |
3751 | { | |
3752 | u64 end; | |
3753 | ||
3754 | BUG_ON(!len); | |
3755 | end = start + len; | |
3756 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3757 | } | |
3758 | ||
009673b4 | 3759 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3760 | { |
3761 | return (file_hashval(inode) + cl_id | |
3762 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3763 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3764 | } |
3765 | ||
009673b4 | 3766 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3767 | |
1da177e4 LT |
3768 | /* |
3769 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3770 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3771 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3772 | * locking, this prevents us from being completely protocol-compliant. The | |
3773 | * real solution to this problem is to start using unsigned file offsets in | |
3774 | * the VFS, but this is a very deep change! | |
3775 | */ | |
3776 | static inline void | |
3777 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3778 | { | |
3779 | if (lock->fl_start < 0) | |
3780 | lock->fl_start = OFFSET_MAX; | |
3781 | if (lock->fl_end < 0) | |
3782 | lock->fl_end = OFFSET_MAX; | |
3783 | } | |
3784 | ||
d5b9026a N |
3785 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3786 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3787 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3788 | }; |
1da177e4 LT |
3789 | |
3790 | static inline void | |
3791 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3792 | { | |
fe0750e5 | 3793 | struct nfs4_lockowner *lo; |
1da177e4 | 3794 | |
d5b9026a | 3795 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3796 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3797 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3798 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3799 | if (!deny->ld_owner.data) |
3800 | /* We just don't care that much */ | |
3801 | goto nevermind; | |
fe0750e5 BF |
3802 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3803 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3804 | } else { |
7c13f344 BF |
3805 | nevermind: |
3806 | deny->ld_owner.len = 0; | |
3807 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3808 | deny->ld_clientid.cl_boot = 0; |
3809 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3810 | } |
3811 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3812 | deny->ld_length = NFS4_MAX_UINT64; |
3813 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3814 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3815 | deny->ld_type = NFS4_READ_LT; | |
3816 | if (fl->fl_type != F_RDLCK) | |
3817 | deny->ld_type = NFS4_WRITE_LT; | |
3818 | } | |
3819 | ||
b93d87c1 BF |
3820 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3821 | { | |
3822 | struct nfs4_ol_stateid *lst; | |
3823 | ||
3824 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3825 | return false; | |
3826 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3827 | struct nfs4_ol_stateid, st_perstateowner); | |
3828 | return lst->st_file->fi_inode == inode; | |
3829 | } | |
3830 | ||
fe0750e5 BF |
3831 | static struct nfs4_lockowner * |
3832 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3833 | struct xdr_netobj *owner) |
3834 | { | |
009673b4 | 3835 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3836 | struct nfs4_lockowner *lo; |
1da177e4 | 3837 | |
009673b4 | 3838 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3839 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3840 | return lo; | |
1da177e4 LT |
3841 | } |
3842 | return NULL; | |
3843 | } | |
3844 | ||
dcef0413 | 3845 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3846 | { |
009673b4 BF |
3847 | struct inode *inode = open_stp->st_file->fi_inode; |
3848 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3849 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3850 | ||
16bfdaaf | 3851 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3852 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3853 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3854 | } |
3855 | ||
1da177e4 LT |
3856 | /* |
3857 | * Alloc a lock owner structure. | |
3858 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3859 | * occurred. |
1da177e4 | 3860 | * |
16bfdaaf | 3861 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3862 | */ |
3863 | ||
fe0750e5 | 3864 | static struct nfs4_lockowner * |
dcef0413 | 3865 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3866 | struct nfs4_lockowner *lo; |
1da177e4 | 3867 | |
fe0750e5 BF |
3868 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3869 | if (!lo) | |
1da177e4 | 3870 | return NULL; |
fe0750e5 BF |
3871 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3872 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3873 | /* It is the openowner seqid that will be incremented in encode in the |
3874 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3875 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3876 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3877 | return lo; | |
1da177e4 LT |
3878 | } |
3879 | ||
dcef0413 BF |
3880 | static struct nfs4_ol_stateid * |
3881 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3882 | { |
dcef0413 | 3883 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3884 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3885 | |
996e0938 | 3886 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3887 | if (stp == NULL) |
6136d2b4 | 3888 | return NULL; |
996e0938 | 3889 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3890 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3891 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3892 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3893 | get_nfs4_file(fp); |
1da177e4 | 3894 | stp->st_file = fp; |
0997b173 | 3895 | stp->st_access_bmap = 0; |
1da177e4 | 3896 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3897 | stp->st_openstp = open_stp; |
1da177e4 LT |
3898 | return stp; |
3899 | } | |
3900 | ||
fd39ca9a | 3901 | static int |
1da177e4 LT |
3902 | check_lock_length(u64 offset, u64 length) |
3903 | { | |
87df4de8 | 3904 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3905 | LOFF_OVERFLOW(offset, length))); |
3906 | } | |
3907 | ||
dcef0413 | 3908 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3909 | { |
3910 | struct nfs4_file *fp = lock_stp->st_file; | |
3911 | int oflag = nfs4_access_to_omode(access); | |
3912 | ||
3913 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3914 | return; | |
3915 | nfs4_file_get_access(fp, oflag); | |
3916 | __set_bit(access, &lock_stp->st_access_bmap); | |
3917 | } | |
3918 | ||
64a284d0 BF |
3919 | __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) |
3920 | { | |
3921 | struct nfs4_file *fi = ost->st_file; | |
3922 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
3923 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
3924 | struct nfs4_lockowner *lo; | |
3925 | unsigned int strhashval; | |
3926 | ||
3927 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
3928 | if (lo) { | |
3929 | if (!cstate->minorversion) | |
3930 | return nfserr_bad_seqid; | |
3931 | /* XXX: a lockowner always has exactly one stateid: */ | |
3932 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3933 | struct nfs4_ol_stateid, st_perstateowner); | |
3934 | return nfs_ok; | |
3935 | } | |
16bfdaaf | 3936 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
3937 | &lock->v.new.owner); |
3938 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
3939 | if (lo == NULL) | |
3940 | return nfserr_jukebox; | |
3941 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
3942 | if (*lst == NULL) { | |
3943 | release_lockowner(lo); | |
3944 | return nfserr_jukebox; | |
3945 | } | |
3946 | *new = true; | |
3947 | return nfs_ok; | |
3948 | } | |
3949 | ||
1da177e4 LT |
3950 | /* |
3951 | * LOCK operation | |
3952 | */ | |
b37ad28b | 3953 | __be32 |
ca364317 | 3954 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3955 | struct nfsd4_lock *lock) |
1da177e4 | 3956 | { |
fe0750e5 BF |
3957 | struct nfs4_openowner *open_sop = NULL; |
3958 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3959 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3960 | struct nfs4_file *fp; |
3961 | struct file *filp = NULL; | |
1da177e4 | 3962 | struct file_lock file_lock; |
8dc7c311 | 3963 | struct file_lock conflock; |
b37ad28b | 3964 | __be32 status = 0; |
64a284d0 | 3965 | bool new_state = false; |
b34f27aa | 3966 | int lkflg; |
b8dd7b9a | 3967 | int err; |
1da177e4 LT |
3968 | |
3969 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3970 | (long long) lock->lk_offset, | |
3971 | (long long) lock->lk_length); | |
3972 | ||
1da177e4 LT |
3973 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3974 | return nfserr_inval; | |
3975 | ||
ca364317 | 3976 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3977 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3978 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3979 | return status; | |
3980 | } | |
3981 | ||
1da177e4 LT |
3982 | nfs4_lock_state(); |
3983 | ||
3984 | if (lock->lk_is_new) { | |
893f8770 N |
3985 | /* |
3986 | * Client indicates that this is a new lockowner. | |
3987 | * Use open owner and open stateid to create lock owner and | |
3988 | * lock stateid. | |
3989 | */ | |
dcef0413 | 3990 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
3991 | |
3992 | if (nfsd4_has_session(cstate)) | |
3993 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
3994 | memcpy(&lock->v.new.clientid, | |
3995 | &cstate->session->se_client->cl_clientid, | |
3996 | sizeof(clientid_t)); | |
3997 | ||
1da177e4 | 3998 | status = nfserr_stale_clientid; |
684e5638 | 3999 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4000 | goto out; |
1da177e4 | 4001 | |
1da177e4 | 4002 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4003 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4004 | lock->lk_new_open_seqid, |
4005 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4006 | &open_stp); |
37515177 | 4007 | if (status) |
1da177e4 | 4008 | goto out; |
fe0750e5 | 4009 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4010 | status = nfserr_bad_stateid; |
684e5638 | 4011 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4012 | &lock->v.new.clientid)) |
4013 | goto out; | |
64a284d0 BF |
4014 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4015 | &lock_stp, &new_state); | |
4016 | if (status) | |
1da177e4 | 4017 | goto out; |
1da177e4 LT |
4018 | } else { |
4019 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4020 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4021 | lock->lk_old_lock_seqid, |
4022 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4023 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4024 | if (status) |
4025 | goto out; | |
4026 | } | |
64a284d0 BF |
4027 | lock_sop = lockowner(lock_stp->st_stateowner); |
4028 | fp = lock_stp->st_file; | |
1da177e4 | 4029 | |
b34f27aa BF |
4030 | lkflg = setlkflg(lock->lk_type); |
4031 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4032 | if (status) | |
4033 | goto out; | |
4034 | ||
0dd395dc | 4035 | status = nfserr_grace; |
af558e33 | 4036 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4037 | goto out; |
4038 | status = nfserr_no_grace; | |
af558e33 | 4039 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4040 | goto out; |
4041 | ||
1da177e4 LT |
4042 | locks_init_lock(&file_lock); |
4043 | switch (lock->lk_type) { | |
4044 | case NFS4_READ_LT: | |
4045 | case NFS4_READW_LT: | |
0997b173 BF |
4046 | filp = find_readable_file(lock_stp->st_file); |
4047 | if (filp) | |
4048 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4049 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4050 | break; |
1da177e4 LT |
4051 | case NFS4_WRITE_LT: |
4052 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4053 | filp = find_writeable_file(lock_stp->st_file); |
4054 | if (filp) | |
4055 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4056 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4057 | break; |
1da177e4 LT |
4058 | default: |
4059 | status = nfserr_inval; | |
4060 | goto out; | |
4061 | } | |
f9d7562f BF |
4062 | if (!filp) { |
4063 | status = nfserr_openmode; | |
4064 | goto out; | |
4065 | } | |
b59e3c0e | 4066 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4067 | file_lock.fl_pid = current->tgid; |
4068 | file_lock.fl_file = filp; | |
4069 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4070 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4071 | |
4072 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4073 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4074 | nfs4_transform_lock_offset(&file_lock); |
4075 | ||
4076 | /* | |
4077 | * Try to lock the file in the VFS. | |
4078 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4079 | */ | |
4080 | ||
529d7b2a | 4081 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4082 | switch (-err) { |
1da177e4 | 4083 | case 0: /* success! */ |
dcef0413 BF |
4084 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4085 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4086 | sizeof(stateid_t)); |
b8dd7b9a | 4087 | status = 0; |
eb76b3fd AA |
4088 | break; |
4089 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4090 | status = nfserr_denied; | |
4091 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4092 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4093 | break; | |
1da177e4 LT |
4094 | case (EDEADLK): |
4095 | status = nfserr_deadlock; | |
eb76b3fd | 4096 | break; |
3e772463 | 4097 | default: |
fd85b817 | 4098 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4099 | status = nfserrno(err); |
eb76b3fd | 4100 | break; |
1da177e4 | 4101 | } |
1da177e4 | 4102 | out: |
64a284d0 | 4103 | if (status && new_state) |
f044ff83 | 4104 | release_lockowner(lock_sop); |
5ec094c1 BF |
4105 | if (!cstate->replay_owner) |
4106 | nfs4_unlock_state(); | |
1da177e4 LT |
4107 | return status; |
4108 | } | |
4109 | ||
55ef1274 BF |
4110 | /* |
4111 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4112 | * so we do a temporary open here just to get an open file to pass to | |
4113 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4114 | * inode operation.) | |
4115 | */ | |
4116 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4117 | { | |
4118 | struct file *file; | |
4119 | int err; | |
4120 | ||
4121 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4122 | if (err) | |
4123 | return err; | |
4124 | err = vfs_test_lock(file, lock); | |
4125 | nfsd_close(file); | |
4126 | return err; | |
4127 | } | |
4128 | ||
1da177e4 LT |
4129 | /* |
4130 | * LOCKT operation | |
4131 | */ | |
b37ad28b | 4132 | __be32 |
ca364317 BF |
4133 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4134 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4135 | { |
4136 | struct inode *inode; | |
1da177e4 | 4137 | struct file_lock file_lock; |
fe0750e5 | 4138 | struct nfs4_lockowner *lo; |
fd85b817 | 4139 | int error; |
b37ad28b | 4140 | __be32 status; |
1da177e4 | 4141 | |
af558e33 | 4142 | if (locks_in_grace()) |
1da177e4 LT |
4143 | return nfserr_grace; |
4144 | ||
4145 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4146 | return nfserr_inval; | |
4147 | ||
1da177e4 LT |
4148 | nfs4_lock_state(); |
4149 | ||
4150 | status = nfserr_stale_clientid; | |
60adfc50 | 4151 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4152 | goto out; |
1da177e4 | 4153 | |
75c096f7 | 4154 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4155 | goto out; |
1da177e4 | 4156 | |
ca364317 | 4157 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4158 | locks_init_lock(&file_lock); |
4159 | switch (lockt->lt_type) { | |
4160 | case NFS4_READ_LT: | |
4161 | case NFS4_READW_LT: | |
4162 | file_lock.fl_type = F_RDLCK; | |
4163 | break; | |
4164 | case NFS4_WRITE_LT: | |
4165 | case NFS4_WRITEW_LT: | |
4166 | file_lock.fl_type = F_WRLCK; | |
4167 | break; | |
4168 | default: | |
2fdada03 | 4169 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4170 | status = nfserr_inval; |
4171 | goto out; | |
4172 | } | |
4173 | ||
fe0750e5 BF |
4174 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4175 | if (lo) | |
4176 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4177 | file_lock.fl_pid = current->tgid; |
4178 | file_lock.fl_flags = FL_POSIX; | |
4179 | ||
4180 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4181 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4182 | |
4183 | nfs4_transform_lock_offset(&file_lock); | |
4184 | ||
1da177e4 | 4185 | status = nfs_ok; |
55ef1274 | 4186 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4187 | if (error) { |
4188 | status = nfserrno(error); | |
4189 | goto out; | |
4190 | } | |
9d6a8c5c | 4191 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4192 | status = nfserr_denied; |
9d6a8c5c | 4193 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4194 | } |
4195 | out: | |
4196 | nfs4_unlock_state(); | |
4197 | return status; | |
4198 | } | |
4199 | ||
b37ad28b | 4200 | __be32 |
ca364317 | 4201 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4202 | struct nfsd4_locku *locku) |
1da177e4 | 4203 | { |
dcef0413 | 4204 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4205 | struct file *filp = NULL; |
4206 | struct file_lock file_lock; | |
b37ad28b | 4207 | __be32 status; |
b8dd7b9a | 4208 | int err; |
1da177e4 LT |
4209 | |
4210 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4211 | (long long) locku->lu_offset, | |
4212 | (long long) locku->lu_length); | |
4213 | ||
4214 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4215 | return nfserr_inval; | |
4216 | ||
4217 | nfs4_lock_state(); | |
4218 | ||
9072d5c6 | 4219 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4220 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4221 | if (status) |
1da177e4 | 4222 | goto out; |
f9d7562f BF |
4223 | filp = find_any_file(stp->st_file); |
4224 | if (!filp) { | |
4225 | status = nfserr_lock_range; | |
4226 | goto out; | |
4227 | } | |
1da177e4 LT |
4228 | BUG_ON(!filp); |
4229 | locks_init_lock(&file_lock); | |
4230 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4231 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4232 | file_lock.fl_pid = current->tgid; |
4233 | file_lock.fl_file = filp; | |
4234 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4235 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4236 | file_lock.fl_start = locku->lu_offset; |
4237 | ||
87df4de8 | 4238 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4239 | nfs4_transform_lock_offset(&file_lock); |
4240 | ||
4241 | /* | |
4242 | * Try to unlock the file in the VFS. | |
4243 | */ | |
fd85b817 | 4244 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4245 | if (err) { |
fd85b817 | 4246 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4247 | goto out_nfserr; |
4248 | } | |
4249 | /* | |
4250 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4251 | */ | |
dcef0413 BF |
4252 | update_stateid(&stp->st_stid.sc_stateid); |
4253 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4254 | |
4255 | out: | |
71c3bcd7 BF |
4256 | if (!cstate->replay_owner) |
4257 | nfs4_unlock_state(); | |
1da177e4 LT |
4258 | return status; |
4259 | ||
4260 | out_nfserr: | |
b8dd7b9a | 4261 | status = nfserrno(err); |
1da177e4 LT |
4262 | goto out; |
4263 | } | |
4264 | ||
4265 | /* | |
4266 | * returns | |
4267 | * 1: locks held by lockowner | |
4268 | * 0: no locks held by lockowner | |
4269 | */ | |
4270 | static int | |
fe0750e5 | 4271 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4272 | { |
4273 | struct file_lock **flpp; | |
f9d7562f | 4274 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4275 | int status = 0; |
4276 | ||
b89f4321 | 4277 | lock_flocks(); |
1da177e4 | 4278 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4279 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4280 | status = 1; |
4281 | goto out; | |
796dadfd | 4282 | } |
1da177e4 LT |
4283 | } |
4284 | out: | |
b89f4321 | 4285 | unlock_flocks(); |
1da177e4 LT |
4286 | return status; |
4287 | } | |
4288 | ||
b37ad28b | 4289 | __be32 |
b591480b BF |
4290 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4291 | struct nfsd4_compound_state *cstate, | |
4292 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4293 | { |
4294 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4295 | struct nfs4_stateowner *sop; |
fe0750e5 | 4296 | struct nfs4_lockowner *lo; |
dcef0413 | 4297 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4298 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4299 | struct list_head matches; |
16bfdaaf | 4300 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4301 | __be32 status; |
1da177e4 LT |
4302 | |
4303 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4304 | clid->cl_boot, clid->cl_id); | |
4305 | ||
4306 | /* XXX check for lease expiration */ | |
4307 | ||
4308 | status = nfserr_stale_clientid; | |
849823c5 | 4309 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4310 | return status; |
1da177e4 LT |
4311 | |
4312 | nfs4_lock_state(); | |
4313 | ||
3e9e3dbe | 4314 | status = nfserr_locks_held; |
3e9e3dbe | 4315 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4316 | |
16bfdaaf BF |
4317 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4318 | if (sop->so_is_open_owner) | |
4319 | continue; | |
06f1f864 BF |
4320 | if (!same_owner_str(sop, owner, clid)) |
4321 | continue; | |
4322 | list_for_each_entry(stp, &sop->so_stateids, | |
4323 | st_perstateowner) { | |
4324 | lo = lockowner(sop); | |
4325 | if (check_for_locks(stp->st_file, lo)) | |
4326 | goto out; | |
4327 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4328 | } |
3e9e3dbe N |
4329 | } |
4330 | /* Clients probably won't expect us to return with some (but not all) | |
4331 | * of the lockowner state released; so don't release any until all | |
4332 | * have been checked. */ | |
4333 | status = nfs_ok; | |
0fa822e4 | 4334 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4335 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4336 | lo_list); | |
0fa822e4 N |
4337 | /* unhash_stateowner deletes so_perclient only |
4338 | * for openowners. */ | |
fe0750e5 BF |
4339 | list_del(&lo->lo_list); |
4340 | release_lockowner(lo); | |
1da177e4 LT |
4341 | } |
4342 | out: | |
4343 | nfs4_unlock_state(); | |
4344 | return status; | |
4345 | } | |
4346 | ||
4347 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4348 | alloc_reclaim(void) |
1da177e4 | 4349 | { |
a55370a3 | 4350 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4351 | } |
4352 | ||
c7b9a459 | 4353 | int |
a1bcecd2 | 4354 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4355 | { |
4356 | unsigned int strhashval = clientstr_hashval(name); | |
4357 | struct nfs4_client *clp; | |
4358 | ||
e203d506 | 4359 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4360 | return clp ? 1 : 0; |
4361 | } | |
4362 | ||
1da177e4 LT |
4363 | /* |
4364 | * failure => all reset bets are off, nfserr_no_grace... | |
4365 | */ | |
190e4fbf N |
4366 | int |
4367 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4368 | { |
4369 | unsigned int strhashval; | |
4370 | struct nfs4_client_reclaim *crp = NULL; | |
4371 | ||
a55370a3 N |
4372 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4373 | crp = alloc_reclaim(); | |
1da177e4 LT |
4374 | if (!crp) |
4375 | return 0; | |
a55370a3 | 4376 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4377 | INIT_LIST_HEAD(&crp->cr_strhash); |
4378 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4379 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4380 | reclaim_str_hashtbl_size++; |
4381 | return 1; | |
4382 | } | |
4383 | ||
4384 | static void | |
4385 | nfs4_release_reclaim(void) | |
4386 | { | |
4387 | struct nfs4_client_reclaim *crp = NULL; | |
4388 | int i; | |
4389 | ||
1da177e4 LT |
4390 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4391 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4392 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4393 | struct nfs4_client_reclaim, cr_strhash); | |
4394 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4395 | kfree(crp); |
4396 | reclaim_str_hashtbl_size--; | |
4397 | } | |
4398 | } | |
4399 | BUG_ON(reclaim_str_hashtbl_size); | |
4400 | } | |
4401 | ||
4402 | /* | |
4403 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4404 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4405 | nfs4_find_reclaim_client(clientid_t *clid) |
4406 | { | |
4407 | unsigned int strhashval; | |
4408 | struct nfs4_client *clp; | |
4409 | struct nfs4_client_reclaim *crp = NULL; | |
4410 | ||
4411 | ||
4412 | /* find clientid in conf_id_hashtbl */ | |
4413 | clp = find_confirmed_client(clid); | |
4414 | if (clp == NULL) | |
4415 | return NULL; | |
4416 | ||
a55370a3 N |
4417 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4418 | clp->cl_name.len, clp->cl_name.data, | |
4419 | clp->cl_recdir); | |
1da177e4 LT |
4420 | |
4421 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4422 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4423 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4424 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4425 | return crp; |
4426 | } | |
4427 | } | |
4428 | return NULL; | |
4429 | } | |
4430 | ||
4431 | /* | |
4432 | * Called from OPEN. Look for clientid in reclaim list. | |
4433 | */ | |
b37ad28b | 4434 | __be32 |
1da177e4 LT |
4435 | nfs4_check_open_reclaim(clientid_t *clid) |
4436 | { | |
dfc83565 | 4437 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4438 | } |
4439 | ||
65178db4 BS |
4440 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4441 | ||
4442 | void nfsd_forget_clients(u64 num) | |
4443 | { | |
4444 | struct nfs4_client *clp, *next; | |
4445 | int count = 0; | |
4446 | ||
4447 | nfs4_lock_state(); | |
4448 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
4449 | nfsd4_remove_clid_dir(clp); | |
4450 | expire_client(clp); | |
4451 | if (++count == num) | |
4452 | break; | |
4453 | } | |
4454 | nfs4_unlock_state(); | |
4455 | ||
4456 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4457 | } | |
4458 | ||
4459 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4460 | { | |
4461 | release_lockowner(lockowner(sop)); | |
4462 | } | |
4463 | ||
4464 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4465 | { | |
4466 | release_openowner(openowner(sop)); | |
4467 | } | |
4468 | ||
353de31b | 4469 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4470 | void (*release_sop)(struct nfs4_stateowner *)) |
4471 | { | |
4472 | int i, count = 0; | |
4473 | struct nfs4_stateowner *sop, *next; | |
4474 | ||
16bfdaaf BF |
4475 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4476 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4477 | if (sop->so_is_open_owner != is_open_owner) | |
4478 | continue; | |
65178db4 BS |
4479 | release_sop(sop); |
4480 | if (++count == num) | |
4481 | return count; | |
4482 | } | |
4483 | } | |
4484 | return count; | |
4485 | } | |
4486 | ||
4487 | void nfsd_forget_locks(u64 num) | |
4488 | { | |
4489 | int count; | |
4490 | ||
4491 | nfs4_lock_state(); | |
16bfdaaf | 4492 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4493 | nfs4_unlock_state(); |
4494 | ||
4495 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4496 | } | |
4497 | ||
4498 | void nfsd_forget_openowners(u64 num) | |
4499 | { | |
4500 | int count; | |
4501 | ||
4502 | nfs4_lock_state(); | |
16bfdaaf | 4503 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4504 | nfs4_unlock_state(); |
4505 | ||
4506 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4507 | } | |
4508 | ||
4509 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4510 | { | |
4511 | int i, count = 0; | |
2d3475c0 BS |
4512 | struct nfs4_file *fp, *fnext; |
4513 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4514 | |
4515 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4516 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4517 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4518 | deleg_func(dp); |
4519 | if (++count == num) | |
4520 | return count; | |
4521 | } | |
4522 | } | |
4523 | } | |
2d3475c0 | 4524 | |
65178db4 BS |
4525 | return count; |
4526 | } | |
4527 | ||
4528 | void nfsd_forget_delegations(u64 num) | |
4529 | { | |
4530 | unsigned int count; | |
4531 | ||
4532 | nfs4_lock_state(); | |
4533 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4534 | nfs4_unlock_state(); | |
4535 | ||
4536 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4537 | } | |
4538 | ||
4539 | void nfsd_recall_delegations(u64 num) | |
4540 | { | |
4541 | unsigned int count; | |
4542 | ||
4543 | nfs4_lock_state(); | |
4544 | spin_lock(&recall_lock); | |
4545 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4546 | spin_unlock(&recall_lock); | |
4547 | nfs4_unlock_state(); | |
4548 | ||
4549 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4550 | } | |
4551 | ||
4552 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4553 | ||
ac4d8ff2 | 4554 | /* initialization to perform at module load time: */ |
1da177e4 | 4555 | |
72083396 | 4556 | void |
ac4d8ff2 | 4557 | nfs4_state_init(void) |
1da177e4 | 4558 | { |
72083396 | 4559 | int i; |
1da177e4 | 4560 | |
1da177e4 LT |
4561 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4562 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4563 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4564 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4565 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4566 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4567 | } |
5282fd72 ME |
4568 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4569 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4570 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4571 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4572 | } | |
16bfdaaf BF |
4573 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4574 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4575 | } |
009673b4 BF |
4576 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4577 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4578 | INIT_LIST_HEAD(&close_lru); |
4579 | INIT_LIST_HEAD(&client_lru); | |
4580 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4581 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4582 | } |
4583 | ||
190e4fbf N |
4584 | static void |
4585 | nfsd4_load_reboot_recovery_data(void) | |
4586 | { | |
4587 | int status; | |
4588 | ||
0964a3d3 | 4589 | nfs4_lock_state(); |
48483bf2 | 4590 | nfsd4_init_recdir(); |
190e4fbf | 4591 | status = nfsd4_recdir_load(); |
0964a3d3 | 4592 | nfs4_unlock_state(); |
190e4fbf N |
4593 | if (status) |
4594 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4595 | } | |
4596 | ||
c2f1a551 MS |
4597 | /* |
4598 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4599 | * client may quite reasonably hang on to a delegation as long as it has | |
4600 | * the inode cached. This becomes an obvious problem the first time a | |
4601 | * client's inode cache approaches the size of the server's total memory. | |
4602 | * | |
4603 | * For now we avoid this problem by imposing a hard limit on the number | |
4604 | * of delegations, which varies according to the server's memory size. | |
4605 | */ | |
4606 | static void | |
4607 | set_max_delegations(void) | |
4608 | { | |
4609 | /* | |
4610 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4611 | * estimates suggest that in the worst case (where every delegation | |
4612 | * is for a different inode), a delegation could take about 1.5K, | |
4613 | * giving a worst case usage of about 6% of memory. | |
4614 | */ | |
4615 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4616 | } | |
4617 | ||
ac4d8ff2 N |
4618 | /* initialization to perform when the nfsd service is started: */ |
4619 | ||
29ab23cc | 4620 | static int |
ac4d8ff2 N |
4621 | __nfs4_state_start(void) |
4622 | { | |
b5a1a81e BF |
4623 | int ret; |
4624 | ||
1da177e4 | 4625 | boot_time = get_seconds(); |
af558e33 | 4626 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4627 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4628 | nfsd4_grace); |
b5a1a81e BF |
4629 | ret = set_callback_cred(); |
4630 | if (ret) | |
4631 | return -ENOMEM; | |
58da282b | 4632 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4633 | if (laundry_wq == NULL) |
4634 | return -ENOMEM; | |
b5a1a81e BF |
4635 | ret = nfsd4_create_callback_queue(); |
4636 | if (ret) | |
4637 | goto out_free_laundry; | |
e46b498c | 4638 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4639 | set_max_delegations(); |
b5a1a81e BF |
4640 | return 0; |
4641 | out_free_laundry: | |
4642 | destroy_workqueue(laundry_wq); | |
4643 | return ret; | |
1da177e4 LT |
4644 | } |
4645 | ||
29ab23cc | 4646 | int |
76a3550e | 4647 | nfs4_state_start(void) |
1da177e4 | 4648 | { |
190e4fbf | 4649 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4650 | return __nfs4_state_start(); |
1da177e4 LT |
4651 | } |
4652 | ||
1da177e4 LT |
4653 | static void |
4654 | __nfs4_state_shutdown(void) | |
4655 | { | |
4656 | int i; | |
4657 | struct nfs4_client *clp = NULL; | |
4658 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4659 | struct list_head *pos, *next, reaplist; |
4660 | ||
1da177e4 LT |
4661 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4662 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4663 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4664 | expire_client(clp); | |
4665 | } | |
4666 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4667 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4668 | expire_client(clp); | |
4669 | } | |
4670 | } | |
4671 | INIT_LIST_HEAD(&reaplist); | |
4672 | spin_lock(&recall_lock); | |
4673 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4674 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4675 | list_move(&dp->dl_recall_lru, &reaplist); | |
4676 | } | |
4677 | spin_unlock(&recall_lock); | |
4678 | list_for_each_safe(pos, next, &reaplist) { | |
4679 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4680 | unhash_delegation(dp); |
4681 | } | |
4682 | ||
190e4fbf | 4683 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4684 | } |
4685 | ||
4686 | void | |
4687 | nfs4_state_shutdown(void) | |
4688 | { | |
afe2c511 | 4689 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4690 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4691 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4692 | nfs4_lock_state(); |
4693 | nfs4_release_reclaim(); | |
4694 | __nfs4_state_shutdown(); | |
1da177e4 | 4695 | nfs4_unlock_state(); |
c3935e30 | 4696 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4697 | } |
8b70484c TM |
4698 | |
4699 | static void | |
4700 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4701 | { | |
4702 | if (cstate->current_stateid && CURRENT_STATEID(stateid)) | |
4703 | memcpy(stateid, cstate->current_stateid, sizeof(stateid_t)); | |
4704 | } | |
4705 | ||
4706 | static void | |
4707 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4708 | { | |
4709 | if (cstate->minorversion) | |
4710 | cstate->current_stateid = stateid; | |
4711 | } | |
4712 | ||
62cd4a59 TM |
4713 | /* |
4714 | * functions to set current state id | |
4715 | */ | |
8b70484c TM |
4716 | void |
4717 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4718 | { | |
4719 | put_stateid(cstate, &open->op_stateid); | |
4720 | } | |
4721 | ||
62cd4a59 TM |
4722 | void |
4723 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4724 | { | |
4725 | put_stateid(cstate, &close->cl_stateid); | |
4726 | } | |
4727 | ||
4728 | void | |
4729 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4730 | { | |
4731 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4732 | } | |
4733 | ||
4734 | /* | |
4735 | * functions to consume current state id | |
4736 | */ | |
8b70484c TM |
4737 | void |
4738 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4739 | { | |
4740 | get_stateid(cstate, &close->cl_stateid); | |
4741 | } | |
4742 | ||
4743 | void | |
62cd4a59 | 4744 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4745 | { |
62cd4a59 | 4746 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4747 | } |
30813e27 TM |
4748 | |
4749 | void | |
4750 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4751 | { | |
4752 | get_stateid(cstate, &read->rd_stateid); | |
4753 | } | |
4754 | ||
4755 | void | |
4756 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4757 | { | |
4758 | get_stateid(cstate, &write->wr_stateid); | |
4759 | } |