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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
fd39ca9a N |
52 | static stateid_t zerostateid; /* bits all 0 */ |
53 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 54 | static u64 current_sessionid = 1; |
fd39ca9a N |
55 | |
56 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
57 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 58 | |
1da177e4 | 59 | /* forward declarations */ |
fe0750e5 | 60 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 61 | |
8b671b80 BF |
62 | /* Locking: */ |
63 | ||
64 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 65 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* |
68 | * Currently used for the del_recall_lru and file hash table. In an | |
69 | * effort to decrease the scope of the client_mutex, this spinlock may | |
70 | * eventually cover more: | |
71 | */ | |
72 | static DEFINE_SPINLOCK(recall_lock); | |
73 | ||
fe0750e5 BF |
74 | static struct kmem_cache *openowner_slab = NULL; |
75 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
76 | static struct kmem_cache *file_slab = NULL; |
77 | static struct kmem_cache *stateid_slab = NULL; | |
78 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 79 | |
1da177e4 LT |
80 | void |
81 | nfs4_lock_state(void) | |
82 | { | |
353ab6e9 | 83 | mutex_lock(&client_mutex); |
1da177e4 LT |
84 | } |
85 | ||
86 | void | |
87 | nfs4_unlock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_unlock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | static inline u32 | |
93 | opaque_hashval(const void *ptr, int nbytes) | |
94 | { | |
95 | unsigned char *cptr = (unsigned char *) ptr; | |
96 | ||
97 | u32 x = 0; | |
98 | while (nbytes--) { | |
99 | x *= 37; | |
100 | x += *cptr++; | |
101 | } | |
102 | return x; | |
103 | } | |
104 | ||
1da177e4 LT |
105 | static struct list_head del_recall_lru; |
106 | ||
13cd2184 N |
107 | static inline void |
108 | put_nfs4_file(struct nfs4_file *fi) | |
109 | { | |
8b671b80 BF |
110 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
111 | list_del(&fi->fi_hash); | |
112 | spin_unlock(&recall_lock); | |
113 | iput(fi->fi_inode); | |
114 | kmem_cache_free(file_slab, fi); | |
115 | } | |
13cd2184 N |
116 | } |
117 | ||
118 | static inline void | |
119 | get_nfs4_file(struct nfs4_file *fi) | |
120 | { | |
8b671b80 | 121 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
122 | } |
123 | ||
ef0f3390 | 124 | static int num_delegations; |
c2f1a551 | 125 | unsigned int max_delegations; |
ef0f3390 N |
126 | |
127 | /* | |
128 | * Open owner state (share locks) | |
129 | */ | |
130 | ||
506f275f BF |
131 | /* hash tables for open owners */ |
132 | #define OPEN_OWNER_HASH_BITS 8 | |
133 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
134 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 135 | |
506f275f | 136 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
137 | { |
138 | unsigned int ret; | |
139 | ||
140 | ret = opaque_hashval(ownername->data, ownername->len); | |
141 | ret += clientid; | |
506f275f | 142 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 143 | } |
ef0f3390 | 144 | |
506f275f | 145 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; |
ef0f3390 N |
146 | |
147 | /* hash table for nfs4_file */ | |
148 | #define FILE_HASH_BITS 8 | |
149 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 150 | |
ddc04c41 BF |
151 | static unsigned int file_hashval(struct inode *ino) |
152 | { | |
153 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
154 | return hash_ptr(ino, FILE_HASH_BITS); | |
155 | } | |
156 | ||
ef0f3390 | 157 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 158 | |
998db52c | 159 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
160 | { |
161 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
162 | atomic_inc(&fp->fi_access[oflag]); | |
163 | } | |
164 | ||
998db52c BF |
165 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
166 | { | |
167 | if (oflag == O_RDWR) { | |
168 | __nfs4_file_get_access(fp, O_RDONLY); | |
169 | __nfs4_file_get_access(fp, O_WRONLY); | |
170 | } else | |
171 | __nfs4_file_get_access(fp, oflag); | |
172 | } | |
173 | ||
174 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
175 | { |
176 | if (fp->fi_fds[oflag]) { | |
177 | fput(fp->fi_fds[oflag]); | |
178 | fp->fi_fds[oflag] = NULL; | |
179 | } | |
180 | } | |
181 | ||
998db52c | 182 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
183 | { |
184 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 185 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
186 | /* |
187 | * It's also safe to get rid of the RDWR open *if* | |
188 | * we no longer have need of the other kind of access | |
189 | * or if we already have the other kind of open: | |
190 | */ | |
191 | if (fp->fi_fds[1-oflag] | |
192 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
193 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
194 | } |
195 | } | |
196 | ||
998db52c BF |
197 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
198 | { | |
199 | if (oflag == O_RDWR) { | |
200 | __nfs4_file_put_access(fp, O_RDONLY); | |
201 | __nfs4_file_put_access(fp, O_WRONLY); | |
202 | } else | |
203 | __nfs4_file_put_access(fp, oflag); | |
204 | } | |
205 | ||
6136d2b4 | 206 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 207 | { |
6136d2b4 | 208 | static int min_stateid = 0; |
38c2f4b1 | 209 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
210 | int new_stid; |
211 | int error; | |
212 | ||
38c2f4b1 | 213 | if (!idr_pre_get(stateids, GFP_KERNEL)) |
6136d2b4 BF |
214 | return -ENOMEM; |
215 | ||
38c2f4b1 | 216 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 BF |
217 | /* |
218 | * All this code is currently serialized; the preallocation | |
219 | * above should still be ours: | |
220 | */ | |
221 | BUG_ON(error); | |
222 | /* | |
223 | * It shouldn't be a problem to reuse an opaque stateid value. | |
224 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
225 | * example, a stray write retransmission could be accepted by | |
226 | * the server when it should have been rejected. Therefore, | |
227 | * adopt a trick from the sctp code to attempt to maximize the | |
228 | * amount of time until an id is reused, by ensuring they always | |
229 | * "increase" (mod INT_MAX): | |
230 | */ | |
36d44c60 | 231 | |
6136d2b4 BF |
232 | min_stateid = new_stid+1; |
233 | if (min_stateid == INT_MAX) | |
234 | min_stateid = 0; | |
235 | return new_stid; | |
36d44c60 BF |
236 | } |
237 | ||
6136d2b4 | 238 | static inline __be32 init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
239 | { |
240 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 241 | int new_id; |
2a74aba7 BF |
242 | |
243 | stid->sc_type = type; | |
244 | stid->sc_client = cl; | |
245 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 BF |
246 | new_id = get_new_stid(stid); |
247 | if (new_id < 0) | |
248 | return nfserr_jukebox; | |
249 | s->si_opaque.so_id = (u32)new_id; | |
2a74aba7 BF |
250 | /* Will be incremented before return to client: */ |
251 | s->si_generation = 0; | |
6136d2b4 | 252 | return 0; |
2a74aba7 BF |
253 | } |
254 | ||
1da177e4 | 255 | static struct nfs4_delegation * |
dcef0413 | 256 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
257 | { |
258 | struct nfs4_delegation *dp; | |
259 | struct nfs4_file *fp = stp->st_file; | |
6136d2b4 | 260 | __be32 status; |
1da177e4 LT |
261 | |
262 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
263 | /* |
264 | * Major work on the lease subsystem (for example, to support | |
265 | * calbacks on stat) will be required before we can support | |
266 | * write delegations properly. | |
267 | */ | |
268 | if (type != NFS4_OPEN_DELEGATE_READ) | |
269 | return NULL; | |
47f9940c MS |
270 | if (fp->fi_had_conflict) |
271 | return NULL; | |
c2f1a551 | 272 | if (num_delegations > max_delegations) |
ef0f3390 | 273 | return NULL; |
5b2d21c1 N |
274 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
275 | if (dp == NULL) | |
1da177e4 | 276 | return dp; |
6136d2b4 BF |
277 | status = init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
278 | if (status) { | |
279 | kmem_cache_free(deleg_slab, dp); | |
280 | return NULL; | |
281 | } | |
2a74aba7 BF |
282 | /* |
283 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
284 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
285 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
286 | */ |
287 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 288 | num_delegations++; |
ea1da636 N |
289 | INIT_LIST_HEAD(&dp->dl_perfile); |
290 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 291 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 292 | get_nfs4_file(fp); |
1da177e4 | 293 | dp->dl_file = fp; |
1da177e4 | 294 | dp->dl_type = type; |
6c02eaa1 | 295 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
296 | dp->dl_time = 0; |
297 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 298 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
299 | return dp; |
300 | } | |
301 | ||
302 | void | |
303 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
304 | { | |
305 | if (atomic_dec_and_test(&dp->dl_count)) { | |
306 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 307 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 308 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 309 | num_delegations--; |
1da177e4 LT |
310 | } |
311 | } | |
312 | ||
acfdf5c3 | 313 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 314 | { |
acfdf5c3 BF |
315 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
316 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
317 | fp->fi_lease = NULL; | |
4ee63624 | 318 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
319 | fp->fi_deleg_file = NULL; |
320 | } | |
1da177e4 LT |
321 | } |
322 | ||
6136d2b4 BF |
323 | static void unhash_stid(struct nfs4_stid *s) |
324 | { | |
38c2f4b1 BF |
325 | struct idr *stateids = &s->sc_client->cl_stateids; |
326 | ||
327 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
328 | } |
329 | ||
1da177e4 LT |
330 | /* Called under the state lock. */ |
331 | static void | |
332 | unhash_delegation(struct nfs4_delegation *dp) | |
333 | { | |
6136d2b4 | 334 | unhash_stid(&dp->dl_stid); |
ea1da636 | 335 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 336 | spin_lock(&recall_lock); |
5d926e8c | 337 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
338 | list_del_init(&dp->dl_recall_lru); |
339 | spin_unlock(&recall_lock); | |
acfdf5c3 | 340 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
341 | nfs4_put_delegation(dp); |
342 | } | |
343 | ||
344 | /* | |
345 | * SETCLIENTID state | |
346 | */ | |
347 | ||
36acb66b | 348 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
349 | static DEFINE_SPINLOCK(client_lock); |
350 | ||
1da177e4 LT |
351 | /* Hash tables for nfs4_clientid state */ |
352 | #define CLIENT_HASH_BITS 4 | |
353 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
354 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
355 | ||
ddc04c41 BF |
356 | static unsigned int clientid_hashval(u32 id) |
357 | { | |
358 | return id & CLIENT_HASH_MASK; | |
359 | } | |
360 | ||
361 | static unsigned int clientstr_hashval(const char *name) | |
362 | { | |
363 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /* |
367 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
368 | * used in reboot/reset lease grace period processing | |
369 | * | |
370 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
371 | * setclientid_confirmed info. | |
372 | * | |
373 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
374 | * setclientid info. | |
375 | * | |
376 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
377 | * for lease renewal. | |
378 | * | |
379 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
380 | * for last close replay. | |
381 | */ | |
382 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
383 | static int reclaim_str_hashtbl_size = 0; | |
384 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
385 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
386 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
387 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
388 | static struct list_head client_lru; | |
389 | static struct list_head close_lru; | |
390 | ||
f9d7562f BF |
391 | /* |
392 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
393 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
394 | * only what share bits are currently in force, but also what | |
395 | * combinations of share bits previous opens have used. This allows us | |
396 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
397 | * return an error if the client attempt to downgrade to a combination | |
398 | * of share bits not explicable by closing some of its previous opens. | |
399 | * | |
400 | * XXX: This enforcement is actually incomplete, since we don't keep | |
401 | * track of access/deny bit combinations; so, e.g., we allow: | |
402 | * | |
403 | * OPEN allow read, deny write | |
404 | * OPEN allow both, deny none | |
405 | * DOWNGRADE allow read, deny none | |
406 | * | |
407 | * which we should reject. | |
408 | */ | |
409 | static void | |
410 | set_access(unsigned int *access, unsigned long bmap) { | |
411 | int i; | |
412 | ||
413 | *access = 0; | |
414 | for (i = 1; i < 4; i++) { | |
415 | if (test_bit(i, &bmap)) | |
416 | *access |= i; | |
417 | } | |
418 | } | |
419 | ||
420 | static void | |
421 | set_deny(unsigned int *deny, unsigned long bmap) { | |
422 | int i; | |
423 | ||
424 | *deny = 0; | |
425 | for (i = 0; i < 4; i++) { | |
426 | if (test_bit(i, &bmap)) | |
427 | *deny |= i ; | |
428 | } | |
429 | } | |
430 | ||
431 | static int | |
dcef0413 | 432 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
433 | unsigned int access, deny; |
434 | ||
435 | set_access(&access, stp->st_access_bmap); | |
436 | set_deny(&deny, stp->st_deny_bmap); | |
437 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
438 | return 0; | |
439 | return 1; | |
440 | } | |
441 | ||
442 | static int nfs4_access_to_omode(u32 access) | |
443 | { | |
8f34a430 | 444 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
445 | case NFS4_SHARE_ACCESS_READ: |
446 | return O_RDONLY; | |
447 | case NFS4_SHARE_ACCESS_WRITE: | |
448 | return O_WRONLY; | |
449 | case NFS4_SHARE_ACCESS_BOTH: | |
450 | return O_RDWR; | |
451 | } | |
452 | BUG(); | |
453 | } | |
454 | ||
dcef0413 | 455 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 456 | { |
529d7b2a BF |
457 | list_del(&stp->st_perfile); |
458 | list_del(&stp->st_perstateowner); | |
459 | } | |
460 | ||
dcef0413 | 461 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 462 | { |
499f3edc | 463 | int i; |
0997b173 | 464 | |
23fcf2ec | 465 | if (stp->st_access_bmap) { |
499f3edc BF |
466 | for (i = 1; i < 4; i++) { |
467 | if (test_bit(i, &stp->st_access_bmap)) | |
468 | nfs4_file_put_access(stp->st_file, | |
469 | nfs4_access_to_omode(i)); | |
4665e2ba | 470 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 471 | } |
23fcf2ec | 472 | } |
a96e5b90 | 473 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
474 | stp->st_file = NULL; |
475 | } | |
476 | ||
dcef0413 | 477 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 478 | { |
529d7b2a BF |
479 | kmem_cache_free(stateid_slab, stp); |
480 | } | |
481 | ||
dcef0413 | 482 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
483 | { |
484 | struct file *file; | |
485 | ||
486 | unhash_generic_stateid(stp); | |
6136d2b4 | 487 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
488 | file = find_any_file(stp->st_file); |
489 | if (file) | |
fe0750e5 | 490 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 491 | close_generic_stateid(stp); |
529d7b2a BF |
492 | free_generic_stateid(stp); |
493 | } | |
494 | ||
fe0750e5 | 495 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 496 | { |
dcef0413 | 497 | struct nfs4_ol_stateid *stp; |
529d7b2a | 498 | |
fe0750e5 BF |
499 | list_del(&lo->lo_owner.so_strhash); |
500 | list_del(&lo->lo_perstateid); | |
501 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
502 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 503 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
504 | release_lock_stateid(stp); |
505 | } | |
506 | } | |
507 | ||
fe0750e5 | 508 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 509 | { |
fe0750e5 BF |
510 | unhash_lockowner(lo); |
511 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
512 | } |
513 | ||
514 | static void | |
dcef0413 | 515 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 516 | { |
fe0750e5 | 517 | struct nfs4_lockowner *lo; |
529d7b2a BF |
518 | |
519 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
520 | lo = list_entry(open_stp->st_lockowners.next, |
521 | struct nfs4_lockowner, lo_perstateid); | |
522 | release_lockowner(lo); | |
529d7b2a BF |
523 | } |
524 | } | |
525 | ||
38c387b5 | 526 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
527 | { |
528 | unhash_generic_stateid(stp); | |
529 | release_stateid_lockowners(stp); | |
38c387b5 BF |
530 | close_generic_stateid(stp); |
531 | } | |
532 | ||
533 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
534 | { | |
535 | unhash_open_stateid(stp); | |
6136d2b4 | 536 | unhash_stid(&stp->st_stid); |
2283963f BF |
537 | free_generic_stateid(stp); |
538 | } | |
539 | ||
fe0750e5 | 540 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 541 | { |
dcef0413 | 542 | struct nfs4_ol_stateid *stp; |
f1d110ca | 543 | |
fe0750e5 BF |
544 | list_del(&oo->oo_owner.so_strhash); |
545 | list_del(&oo->oo_perclient); | |
546 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
547 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 548 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 549 | release_open_stateid(stp); |
f1d110ca BF |
550 | } |
551 | } | |
552 | ||
f7a4d872 BF |
553 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
554 | { | |
555 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
556 | ||
557 | if (s) { | |
6136d2b4 | 558 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
559 | free_generic_stateid(s); |
560 | oo->oo_last_closed_stid = NULL; | |
561 | } | |
562 | } | |
563 | ||
fe0750e5 | 564 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 565 | { |
fe0750e5 BF |
566 | unhash_openowner(oo); |
567 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 568 | release_last_closed_stateid(oo); |
fe0750e5 | 569 | nfs4_free_openowner(oo); |
f1d110ca BF |
570 | } |
571 | ||
5282fd72 ME |
572 | #define SESSION_HASH_SIZE 512 |
573 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
574 | ||
575 | static inline int | |
576 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
577 | { | |
578 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
579 | ||
580 | return sid->sequence % SESSION_HASH_SIZE; | |
581 | } | |
582 | ||
583 | static inline void | |
584 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
585 | { | |
586 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
587 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
588 | } | |
589 | ||
ec6b5d7b AA |
590 | static void |
591 | gen_sessionid(struct nfsd4_session *ses) | |
592 | { | |
593 | struct nfs4_client *clp = ses->se_client; | |
594 | struct nfsd4_sessionid *sid; | |
595 | ||
596 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
597 | sid->clientid = clp->cl_clientid; | |
598 | sid->sequence = current_sessionid++; | |
599 | sid->reserved = 0; | |
600 | } | |
601 | ||
602 | /* | |
a649637c AA |
603 | * The protocol defines ca_maxresponssize_cached to include the size of |
604 | * the rpc header, but all we need to cache is the data starting after | |
605 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
606 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
607 | * value that is the number of bytes in our cache plus a few additional | |
608 | * bytes. In order to stay on the safe side, and not promise more than | |
609 | * we can cache, those additional bytes must be the minimum possible: 24 | |
610 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
611 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
612 | * for the SEQUENCE op response: | |
613 | */ | |
614 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
615 | ||
557ce264 AA |
616 | static void |
617 | free_session_slots(struct nfsd4_session *ses) | |
618 | { | |
619 | int i; | |
620 | ||
621 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
622 | kfree(ses->se_slots[i]); | |
623 | } | |
624 | ||
a649637c | 625 | /* |
efe0cb6d BF |
626 | * We don't actually need to cache the rpc and session headers, so we |
627 | * can allocate a little less for each slot: | |
628 | */ | |
629 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
630 | { | |
631 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
632 | } | |
633 | ||
5b6feee9 | 634 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 635 | { |
5b6feee9 BF |
636 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
637 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 638 | |
5b6feee9 BF |
639 | return size; |
640 | } | |
ec6b5d7b | 641 | |
5b6feee9 BF |
642 | /* |
643 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
644 | * re-negotiate active sessions and reduce their slot usage to make |
645 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 646 | */ |
5b6feee9 | 647 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 648 | { |
5b6feee9 | 649 | int avail; |
ec6b5d7b | 650 | |
5b6feee9 | 651 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 652 | |
5b6feee9 BF |
653 | spin_lock(&nfsd_drc_lock); |
654 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
655 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
656 | num = min_t(int, num, avail / slotsize); | |
657 | nfsd_drc_mem_used += num * slotsize; | |
658 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 659 | |
5b6feee9 BF |
660 | return num; |
661 | } | |
ec6b5d7b | 662 | |
5b6feee9 BF |
663 | static void nfsd4_put_drc_mem(int slotsize, int num) |
664 | { | |
4bd9b0f4 | 665 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 666 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 667 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 668 | } |
ec6b5d7b | 669 | |
5b6feee9 BF |
670 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
671 | { | |
672 | struct nfsd4_session *new; | |
673 | int mem, i; | |
a649637c | 674 | |
5b6feee9 BF |
675 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
676 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
677 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 678 | |
5b6feee9 BF |
679 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
680 | if (!new) | |
681 | return NULL; | |
557ce264 | 682 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
683 | for (i = 0; i < numslots; i++) { |
684 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
685 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
686 | if (!new->se_slots[i]) | |
557ce264 | 687 | goto out_free; |
557ce264 | 688 | } |
5b6feee9 BF |
689 | return new; |
690 | out_free: | |
691 | while (i--) | |
692 | kfree(new->se_slots[i]); | |
693 | kfree(new); | |
694 | return NULL; | |
ec6b5d7b AA |
695 | } |
696 | ||
5b6feee9 | 697 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 698 | { |
5b6feee9 | 699 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 700 | |
5b6feee9 | 701 | new->maxreqs = numslots; |
d2b21743 MJ |
702 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
703 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
704 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
705 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
706 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
707 | } | |
ec6b5d7b | 708 | |
19cf5c02 BF |
709 | static void free_conn(struct nfsd4_conn *c) |
710 | { | |
711 | svc_xprt_put(c->cn_xprt); | |
712 | kfree(c); | |
713 | } | |
ec6b5d7b | 714 | |
19cf5c02 BF |
715 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
716 | { | |
717 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
718 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 719 | |
19cf5c02 BF |
720 | spin_lock(&clp->cl_lock); |
721 | if (!list_empty(&c->cn_persession)) { | |
722 | list_del(&c->cn_persession); | |
723 | free_conn(c); | |
724 | } | |
725 | spin_unlock(&clp->cl_lock); | |
eea49806 | 726 | nfsd4_probe_callback(clp); |
19cf5c02 | 727 | } |
ec6b5d7b | 728 | |
d29c374c | 729 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 730 | { |
c7662518 | 731 | struct nfsd4_conn *conn; |
ec6b5d7b | 732 | |
c7662518 BF |
733 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
734 | if (!conn) | |
db90681d | 735 | return NULL; |
c7662518 BF |
736 | svc_xprt_get(rqstp->rq_xprt); |
737 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 738 | conn->cn_flags = flags; |
db90681d BF |
739 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
740 | return conn; | |
741 | } | |
a649637c | 742 | |
328ead28 BF |
743 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
744 | { | |
745 | conn->cn_session = ses; | |
746 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
747 | } |
748 | ||
db90681d | 749 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 750 | { |
db90681d | 751 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 752 | |
c7662518 | 753 | spin_lock(&clp->cl_lock); |
328ead28 | 754 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 755 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
756 | } |
757 | ||
21b75b01 | 758 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 759 | { |
19cf5c02 | 760 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 761 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
762 | } |
763 | ||
1d1bc8f2 | 764 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 765 | { |
db90681d | 766 | struct nfsd4_conn *conn; |
21b75b01 | 767 | int ret; |
ec6b5d7b | 768 | |
1d1bc8f2 | 769 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
770 | if (!conn) |
771 | return nfserr_jukebox; | |
772 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
773 | ret = nfsd4_register_conn(conn); |
774 | if (ret) | |
775 | /* oops; xprt is already down: */ | |
776 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
777 | return nfs_ok; |
778 | } | |
ec6b5d7b | 779 | |
1d1bc8f2 BF |
780 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
781 | { | |
782 | u32 dir = NFS4_CDFC4_FORE; | |
783 | ||
784 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
785 | dir |= NFS4_CDFC4_BACK; | |
786 | ||
787 | return nfsd4_new_conn(rqstp, ses, dir); | |
788 | } | |
789 | ||
790 | /* must be called under client_lock */ | |
19cf5c02 | 791 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 792 | { |
19cf5c02 BF |
793 | struct nfs4_client *clp = s->se_client; |
794 | struct nfsd4_conn *c; | |
ec6b5d7b | 795 | |
19cf5c02 BF |
796 | spin_lock(&clp->cl_lock); |
797 | while (!list_empty(&s->se_conns)) { | |
798 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
799 | list_del_init(&c->cn_persession); | |
800 | spin_unlock(&clp->cl_lock); | |
557ce264 | 801 | |
19cf5c02 BF |
802 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
803 | free_conn(c); | |
ec6b5d7b | 804 | |
19cf5c02 BF |
805 | spin_lock(&clp->cl_lock); |
806 | } | |
807 | spin_unlock(&clp->cl_lock); | |
c7662518 | 808 | } |
ec6b5d7b | 809 | |
c7662518 BF |
810 | void free_session(struct kref *kref) |
811 | { | |
812 | struct nfsd4_session *ses; | |
813 | int mem; | |
814 | ||
815 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 816 | nfsd4_del_conns(ses); |
c7662518 BF |
817 | spin_lock(&nfsd_drc_lock); |
818 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
819 | nfsd_drc_mem_used -= mem; | |
820 | spin_unlock(&nfsd_drc_lock); | |
821 | free_session_slots(ses); | |
822 | kfree(ses); | |
823 | } | |
824 | ||
ac7c46f2 | 825 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
826 | { |
827 | struct nfsd4_session *new; | |
828 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
829 | int numslots, slotsize; | |
c7662518 | 830 | int status; |
5b6feee9 BF |
831 | int idx; |
832 | ||
833 | /* | |
834 | * Note decreasing slot size below client's request may | |
835 | * make it difficult for client to function correctly, whereas | |
836 | * decreasing the number of slots will (just?) affect | |
837 | * performance. When short on memory we therefore prefer to | |
838 | * decrease number of slots instead of their size. | |
839 | */ | |
840 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
841 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
842 | if (numslots < 1) |
843 | return NULL; | |
5b6feee9 BF |
844 | |
845 | new = alloc_session(slotsize, numslots); | |
846 | if (!new) { | |
847 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 848 | return NULL; |
557ce264 | 849 | } |
5b6feee9 | 850 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 851 | |
ec6b5d7b AA |
852 | new->se_client = clp; |
853 | gen_sessionid(new); | |
ec6b5d7b | 854 | |
c7662518 BF |
855 | INIT_LIST_HEAD(&new->se_conns); |
856 | ||
ac7c46f2 | 857 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 858 | new->se_flags = cses->flags; |
8b5ce5cd | 859 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 860 | kref_init(&new->se_ref); |
5b6feee9 | 861 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 862 | spin_lock(&client_lock); |
ec6b5d7b | 863 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 864 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 865 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 866 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 867 | spin_unlock(&client_lock); |
ec6b5d7b | 868 | |
1d1bc8f2 | 869 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 870 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
871 | if (status) { |
872 | free_session(&new->se_ref); | |
ac7c46f2 | 873 | return NULL; |
c7662518 | 874 | } |
dcbeaa68 | 875 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 876 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
877 | /* |
878 | * This is a little silly; with sessions there's no real | |
879 | * use for the callback address. Use the peer address | |
880 | * as a reasonable default for now, but consider fixing | |
881 | * the rpc client not to require an address in the | |
882 | * future: | |
883 | */ | |
edd76786 BF |
884 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
885 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 886 | } |
dcbeaa68 | 887 | nfsd4_probe_callback(clp); |
ac7c46f2 | 888 | return new; |
ec6b5d7b AA |
889 | } |
890 | ||
9089f1b4 | 891 | /* caller must hold client_lock */ |
5282fd72 ME |
892 | static struct nfsd4_session * |
893 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
894 | { | |
895 | struct nfsd4_session *elem; | |
896 | int idx; | |
897 | ||
898 | dump_sessionid(__func__, sessionid); | |
899 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
900 | /* Search in the appropriate list */ |
901 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
902 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
903 | NFS4_MAX_SESSIONID_LEN)) { | |
904 | return elem; | |
905 | } | |
906 | } | |
907 | ||
908 | dprintk("%s: session not found\n", __func__); | |
909 | return NULL; | |
910 | } | |
911 | ||
9089f1b4 | 912 | /* caller must hold client_lock */ |
7116ed6b | 913 | static void |
5282fd72 | 914 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
915 | { |
916 | list_del(&ses->se_hash); | |
4c649378 | 917 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 918 | list_del(&ses->se_perclnt); |
4c649378 | 919 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
920 | } |
921 | ||
36acb66b | 922 | /* must be called under the client_lock */ |
1da177e4 | 923 | static inline void |
36acb66b | 924 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 925 | { |
07cd4909 BH |
926 | if (is_client_expired(clp)) { |
927 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
928 | __func__, | |
929 | clp->cl_clientid.cl_boot, | |
930 | clp->cl_clientid.cl_id); | |
931 | return; | |
932 | } | |
933 | ||
1da177e4 LT |
934 | /* |
935 | * Move client to the end to the LRU list. | |
936 | */ | |
937 | dprintk("renewing client (clientid %08x/%08x)\n", | |
938 | clp->cl_clientid.cl_boot, | |
939 | clp->cl_clientid.cl_id); | |
940 | list_move_tail(&clp->cl_lru, &client_lru); | |
941 | clp->cl_time = get_seconds(); | |
942 | } | |
943 | ||
36acb66b BH |
944 | static inline void |
945 | renew_client(struct nfs4_client *clp) | |
946 | { | |
947 | spin_lock(&client_lock); | |
948 | renew_client_locked(clp); | |
949 | spin_unlock(&client_lock); | |
950 | } | |
951 | ||
1da177e4 LT |
952 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
953 | static int | |
954 | STALE_CLIENTID(clientid_t *clid) | |
955 | { | |
956 | if (clid->cl_boot == boot_time) | |
957 | return 0; | |
60adfc50 AA |
958 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
959 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
960 | return 1; |
961 | } | |
962 | ||
963 | /* | |
964 | * XXX Should we use a slab cache ? | |
965 | * This type of memory management is somewhat inefficient, but we use it | |
966 | * anyway since SETCLIENTID is not a common operation. | |
967 | */ | |
35bba9a3 | 968 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
969 | { |
970 | struct nfs4_client *clp; | |
971 | ||
35bba9a3 BF |
972 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
973 | if (clp == NULL) | |
974 | return NULL; | |
975 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
976 | if (clp->cl_name.data == NULL) { | |
977 | kfree(clp); | |
978 | return NULL; | |
1da177e4 | 979 | } |
35bba9a3 BF |
980 | memcpy(clp->cl_name.data, name.data, name.len); |
981 | clp->cl_name.len = name.len; | |
1da177e4 LT |
982 | return clp; |
983 | } | |
984 | ||
985 | static inline void | |
986 | free_client(struct nfs4_client *clp) | |
987 | { | |
792c95dd BF |
988 | while (!list_empty(&clp->cl_sessions)) { |
989 | struct nfsd4_session *ses; | |
990 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
991 | se_perclnt); | |
992 | list_del(&ses->se_perclnt); | |
993 | nfsd4_put_session(ses); | |
994 | } | |
1da177e4 LT |
995 | if (clp->cl_cred.cr_group_info) |
996 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 997 | kfree(clp->cl_principal); |
1da177e4 LT |
998 | kfree(clp->cl_name.data); |
999 | kfree(clp); | |
1000 | } | |
1001 | ||
d7682988 BH |
1002 | void |
1003 | release_session_client(struct nfsd4_session *session) | |
1004 | { | |
1005 | struct nfs4_client *clp = session->se_client; | |
1006 | ||
1007 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1008 | return; | |
1009 | if (is_client_expired(clp)) { | |
1010 | free_client(clp); | |
1011 | session->se_client = NULL; | |
1012 | } else | |
1013 | renew_client_locked(clp); | |
1014 | spin_unlock(&client_lock); | |
d7682988 BH |
1015 | } |
1016 | ||
84d38ac9 BH |
1017 | /* must be called under the client_lock */ |
1018 | static inline void | |
1019 | unhash_client_locked(struct nfs4_client *clp) | |
1020 | { | |
792c95dd BF |
1021 | struct nfsd4_session *ses; |
1022 | ||
07cd4909 | 1023 | mark_client_expired(clp); |
84d38ac9 | 1024 | list_del(&clp->cl_lru); |
4c649378 | 1025 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1026 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1027 | list_del_init(&ses->se_hash); | |
4c649378 | 1028 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1029 | } |
1030 | ||
1da177e4 LT |
1031 | static void |
1032 | expire_client(struct nfs4_client *clp) | |
1033 | { | |
fe0750e5 | 1034 | struct nfs4_openowner *oo; |
1da177e4 | 1035 | struct nfs4_delegation *dp; |
1da177e4 LT |
1036 | struct list_head reaplist; |
1037 | ||
1da177e4 LT |
1038 | INIT_LIST_HEAD(&reaplist); |
1039 | spin_lock(&recall_lock); | |
ea1da636 N |
1040 | while (!list_empty(&clp->cl_delegations)) { |
1041 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1042 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1043 | list_move(&dp->dl_recall_lru, &reaplist); |
1044 | } | |
1045 | spin_unlock(&recall_lock); | |
1046 | while (!list_empty(&reaplist)) { | |
1047 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1048 | list_del_init(&dp->dl_recall_lru); | |
1049 | unhash_delegation(dp); | |
1050 | } | |
ea1da636 | 1051 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1052 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1053 | release_openowner(oo); | |
1da177e4 | 1054 | } |
6ff8da08 | 1055 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1056 | if (clp->cl_cb_conn.cb_xprt) |
1057 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1058 | list_del(&clp->cl_idhash); |
1059 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1060 | spin_lock(&client_lock); |
84d38ac9 | 1061 | unhash_client_locked(clp); |
46583e25 BH |
1062 | if (atomic_read(&clp->cl_refcount) == 0) |
1063 | free_client(clp); | |
be1fdf6c | 1064 | spin_unlock(&client_lock); |
1da177e4 LT |
1065 | } |
1066 | ||
35bba9a3 BF |
1067 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1068 | { | |
1069 | memcpy(target->cl_verifier.data, source->data, | |
1070 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1071 | } |
1072 | ||
35bba9a3 BF |
1073 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1074 | { | |
1da177e4 LT |
1075 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1076 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1077 | } | |
1078 | ||
35bba9a3 BF |
1079 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1080 | { | |
1da177e4 LT |
1081 | target->cr_uid = source->cr_uid; |
1082 | target->cr_gid = source->cr_gid; | |
1083 | target->cr_group_info = source->cr_group_info; | |
1084 | get_group_info(target->cr_group_info); | |
1085 | } | |
1086 | ||
35bba9a3 | 1087 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1088 | { |
a55370a3 | 1089 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1090 | } |
1091 | ||
1092 | static int | |
599e0a22 BF |
1093 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1094 | { | |
1095 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | static int | |
599e0a22 BF |
1099 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1100 | { | |
1101 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1102 | } |
1103 | ||
1104 | /* XXX what about NGROUP */ | |
1105 | static int | |
599e0a22 BF |
1106 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1107 | { | |
1108 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1109 | } |
1110 | ||
5ec7b46c BF |
1111 | static void gen_clid(struct nfs4_client *clp) |
1112 | { | |
1113 | static u32 current_clientid = 1; | |
1114 | ||
1da177e4 LT |
1115 | clp->cl_clientid.cl_boot = boot_time; |
1116 | clp->cl_clientid.cl_id = current_clientid++; | |
1117 | } | |
1118 | ||
deda2faa BF |
1119 | static void gen_confirm(struct nfs4_client *clp) |
1120 | { | |
1121 | static u32 i; | |
1122 | u32 *p; | |
1da177e4 | 1123 | |
1da177e4 | 1124 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1125 | *p++ = get_seconds(); |
1126 | *p++ = i++; | |
1da177e4 LT |
1127 | } |
1128 | ||
38c2f4b1 | 1129 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1130 | { |
38c2f4b1 | 1131 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1132 | } |
1133 | ||
38c2f4b1 | 1134 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1135 | { |
1136 | struct nfs4_stid *s; | |
4d71ab87 | 1137 | |
38c2f4b1 | 1138 | s = find_stateid(cl, t); |
4d71ab87 BF |
1139 | if (!s) |
1140 | return NULL; | |
f459e453 | 1141 | if (typemask & s->sc_type) |
4581d140 | 1142 | return s; |
4581d140 BF |
1143 | return NULL; |
1144 | } | |
1145 | ||
b09333c4 RL |
1146 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1147 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1148 | { | |
1149 | struct nfs4_client *clp; | |
1150 | struct sockaddr *sa = svc_addr(rqstp); | |
1151 | char *princ; | |
1152 | ||
1153 | clp = alloc_client(name); | |
1154 | if (clp == NULL) | |
1155 | return NULL; | |
1156 | ||
792c95dd BF |
1157 | INIT_LIST_HEAD(&clp->cl_sessions); |
1158 | ||
b09333c4 RL |
1159 | princ = svc_gss_principal(rqstp); |
1160 | if (princ) { | |
1161 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1162 | if (clp->cl_principal == NULL) { | |
1163 | free_client(clp); | |
1164 | return NULL; | |
1165 | } | |
1166 | } | |
1167 | ||
38c2f4b1 | 1168 | idr_init(&clp->cl_stateids); |
b09333c4 | 1169 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1170 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1171 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1172 | INIT_LIST_HEAD(&clp->cl_idhash); |
1173 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1174 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1175 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1176 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1177 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1178 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1179 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1180 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1181 | clear_bit(0, &clp->cl_cb_slot_busy); |
1182 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1183 | copy_verf(clp, verf); | |
1184 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1185 | clp->cl_flavor = rqstp->rq_flavor; | |
1186 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1187 | gen_confirm(clp); | |
edd76786 | 1188 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1189 | return clp; |
1190 | } | |
1191 | ||
fd39ca9a | 1192 | static void |
1da177e4 LT |
1193 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1194 | { | |
1195 | unsigned int idhashval; | |
1196 | ||
1197 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1198 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1199 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1200 | renew_client(clp); |
1da177e4 LT |
1201 | } |
1202 | ||
fd39ca9a | 1203 | static void |
1da177e4 LT |
1204 | move_to_confirmed(struct nfs4_client *clp) |
1205 | { | |
1206 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1207 | unsigned int strhashval; | |
1208 | ||
1209 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1210 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1211 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1212 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1213 | renew_client(clp); |
1214 | } | |
1215 | ||
1216 | static struct nfs4_client * | |
1217 | find_confirmed_client(clientid_t *clid) | |
1218 | { | |
1219 | struct nfs4_client *clp; | |
1220 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1221 | ||
1222 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1223 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1224 | return clp; |
1225 | } | |
1226 | return NULL; | |
1227 | } | |
1228 | ||
1229 | static struct nfs4_client * | |
1230 | find_unconfirmed_client(clientid_t *clid) | |
1231 | { | |
1232 | struct nfs4_client *clp; | |
1233 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1234 | ||
1235 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1236 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1237 | return clp; |
1238 | } | |
1239 | return NULL; | |
1240 | } | |
1241 | ||
6e5f15c9 | 1242 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1243 | { |
6e5f15c9 | 1244 | return clp->cl_exchange_flags != 0; |
e203d506 | 1245 | } |
a1bcecd2 | 1246 | |
28ce6054 | 1247 | static struct nfs4_client * |
e203d506 | 1248 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1249 | { |
1250 | struct nfs4_client *clp; | |
1251 | ||
1252 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1253 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1254 | return clp; |
1255 | } | |
1256 | return NULL; | |
1257 | } | |
1258 | ||
1259 | static struct nfs4_client * | |
e203d506 | 1260 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1261 | { |
1262 | struct nfs4_client *clp; | |
1263 | ||
1264 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1265 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1266 | return clp; |
1267 | } | |
1268 | return NULL; | |
1269 | } | |
1270 | ||
fd39ca9a | 1271 | static void |
6f3d772f | 1272 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1273 | { |
07263f1e | 1274 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1275 | struct sockaddr *sa = svc_addr(rqstp); |
1276 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1277 | unsigned short expected_family; |
1278 | ||
1279 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1280 | if (se->se_callback_netid_len == 3 && | |
1281 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1282 | expected_family = AF_INET; | |
1283 | else if (se->se_callback_netid_len == 4 && | |
1284 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1285 | expected_family = AF_INET6; | |
1286 | else | |
1da177e4 LT |
1287 | goto out_err; |
1288 | ||
07263f1e | 1289 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1290 | se->se_callback_addr_len, |
07263f1e BF |
1291 | (struct sockaddr *)&conn->cb_addr, |
1292 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1293 | |
07263f1e | 1294 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1295 | goto out_err; |
aa9a4ec7 | 1296 | |
07263f1e BF |
1297 | if (conn->cb_addr.ss_family == AF_INET6) |
1298 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1299 | |
07263f1e BF |
1300 | conn->cb_prog = se->se_callback_prog; |
1301 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1302 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1303 | return; |
1304 | out_err: | |
07263f1e BF |
1305 | conn->cb_addr.ss_family = AF_UNSPEC; |
1306 | conn->cb_addrlen = 0; | |
849823c5 | 1307 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1308 | "will not receive delegations\n", |
1309 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1310 | ||
1da177e4 LT |
1311 | return; |
1312 | } | |
1313 | ||
074fe897 | 1314 | /* |
557ce264 | 1315 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1316 | */ |
074fe897 AA |
1317 | void |
1318 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1319 | { |
557ce264 AA |
1320 | struct nfsd4_slot *slot = resp->cstate.slot; |
1321 | unsigned int base; | |
074fe897 | 1322 | |
557ce264 | 1323 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1324 | |
557ce264 AA |
1325 | slot->sl_opcnt = resp->opcnt; |
1326 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1327 | |
bf864a31 | 1328 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1329 | slot->sl_datalen = 0; |
bf864a31 | 1330 | return; |
074fe897 | 1331 | } |
557ce264 AA |
1332 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1333 | base = (char *)resp->cstate.datap - | |
1334 | (char *)resp->xbuf->head[0].iov_base; | |
1335 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1336 | slot->sl_datalen)) | |
1337 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1338 | return; | |
074fe897 AA |
1339 | } |
1340 | ||
1341 | /* | |
abfabf8c AA |
1342 | * Encode the replay sequence operation from the slot values. |
1343 | * If cachethis is FALSE encode the uncached rep error on the next | |
1344 | * operation which sets resp->p and increments resp->opcnt for | |
1345 | * nfs4svc_encode_compoundres. | |
074fe897 | 1346 | * |
074fe897 | 1347 | */ |
abfabf8c AA |
1348 | static __be32 |
1349 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1350 | struct nfsd4_compoundres *resp) | |
074fe897 | 1351 | { |
abfabf8c AA |
1352 | struct nfsd4_op *op; |
1353 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1354 | |
abfabf8c | 1355 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1356 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1357 | |
abfabf8c AA |
1358 | /* Encode the replayed sequence operation */ |
1359 | op = &args->ops[resp->opcnt - 1]; | |
1360 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1361 | |
abfabf8c | 1362 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1363 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1364 | op = &args->ops[resp->opcnt++]; |
1365 | op->status = nfserr_retry_uncached_rep; | |
1366 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1367 | } |
abfabf8c | 1368 | return op->status; |
074fe897 AA |
1369 | } |
1370 | ||
1371 | /* | |
557ce264 AA |
1372 | * The sequence operation is not cached because we can use the slot and |
1373 | * session values. | |
074fe897 AA |
1374 | */ |
1375 | __be32 | |
bf864a31 AA |
1376 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1377 | struct nfsd4_sequence *seq) | |
074fe897 | 1378 | { |
557ce264 | 1379 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1380 | __be32 status; |
1381 | ||
557ce264 | 1382 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1383 | |
abfabf8c AA |
1384 | /* Either returns 0 or nfserr_retry_uncached */ |
1385 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1386 | if (status == nfserr_retry_uncached_rep) | |
1387 | return status; | |
074fe897 | 1388 | |
557ce264 AA |
1389 | /* The sequence operation has been encoded, cstate->datap set. */ |
1390 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1391 | |
557ce264 AA |
1392 | resp->opcnt = slot->sl_opcnt; |
1393 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1394 | status = slot->sl_status; | |
074fe897 AA |
1395 | |
1396 | return status; | |
1397 | } | |
1398 | ||
0733d213 AA |
1399 | /* |
1400 | * Set the exchange_id flags returned by the server. | |
1401 | */ | |
1402 | static void | |
1403 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1404 | { | |
1405 | /* pNFS is not supported */ | |
1406 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1407 | ||
1408 | /* Referrals are supported, Migration is not. */ | |
1409 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1410 | ||
1411 | /* set the wire flags to return to client. */ | |
1412 | clid->flags = new->cl_exchange_flags; | |
1413 | } | |
1414 | ||
069b6ad4 AA |
1415 | __be32 |
1416 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1417 | struct nfsd4_compound_state *cstate, | |
1418 | struct nfsd4_exchange_id *exid) | |
1419 | { | |
0733d213 AA |
1420 | struct nfs4_client *unconf, *conf, *new; |
1421 | int status; | |
1422 | unsigned int strhashval; | |
1423 | char dname[HEXDIR_LEN]; | |
363168b4 | 1424 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1425 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1426 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1427 | |
363168b4 | 1428 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1429 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1430 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1431 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1432 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1433 | |
a084daf5 | 1434 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1435 | return nfserr_inval; |
1436 | ||
1437 | /* Currently only support SP4_NONE */ | |
1438 | switch (exid->spa_how) { | |
1439 | case SP4_NONE: | |
1440 | break; | |
1441 | case SP4_SSV: | |
044bc1d4 | 1442 | return nfserr_serverfault; |
0733d213 AA |
1443 | default: |
1444 | BUG(); /* checked by xdr code */ | |
1445 | case SP4_MACH_CRED: | |
1446 | return nfserr_serverfault; /* no excuse :-/ */ | |
1447 | } | |
1448 | ||
1449 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1450 | ||
1451 | if (status) | |
1452 | goto error; | |
1453 | ||
1454 | strhashval = clientstr_hashval(dname); | |
1455 | ||
1456 | nfs4_lock_state(); | |
1457 | status = nfs_ok; | |
1458 | ||
e203d506 | 1459 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1460 | if (conf) { |
e203d506 BF |
1461 | if (!clp_used_exchangeid(conf)) { |
1462 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1463 | goto out; | |
1464 | } | |
0733d213 AA |
1465 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1466 | /* 18.35.4 case 8 */ | |
1467 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1468 | status = nfserr_not_same; | |
1469 | goto out; | |
1470 | } | |
1471 | /* Client reboot: destroy old state */ | |
1472 | expire_client(conf); | |
1473 | goto out_new; | |
1474 | } | |
1475 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1476 | /* 18.35.4 case 9 */ | |
1477 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1478 | status = nfserr_perm; | |
1479 | goto out; | |
1480 | } | |
1481 | expire_client(conf); | |
1482 | goto out_new; | |
1483 | } | |
0733d213 AA |
1484 | /* |
1485 | * Set bit when the owner id and verifier map to an already | |
1486 | * confirmed client id (18.35.3). | |
1487 | */ | |
1488 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1489 | ||
1490 | /* | |
1491 | * Falling into 18.35.4 case 2, possible router replay. | |
1492 | * Leave confirmed record intact and return same result. | |
1493 | */ | |
1494 | copy_verf(conf, &verf); | |
1495 | new = conf; | |
1496 | goto out_copy; | |
6ddbbbfe MS |
1497 | } |
1498 | ||
1499 | /* 18.35.4 case 7 */ | |
1500 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1501 | status = nfserr_noent; | |
1502 | goto out; | |
0733d213 AA |
1503 | } |
1504 | ||
e203d506 | 1505 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1506 | if (unconf) { |
1507 | /* | |
1508 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1509 | * a new unconfirmed record should be generated regardless | |
1510 | * of whether any properties have changed. | |
1511 | */ | |
1512 | expire_client(unconf); | |
1513 | } | |
1514 | ||
1515 | out_new: | |
1516 | /* Normal case */ | |
b09333c4 | 1517 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1518 | if (new == NULL) { |
4731030d | 1519 | status = nfserr_jukebox; |
0733d213 AA |
1520 | goto out; |
1521 | } | |
1522 | ||
0733d213 | 1523 | gen_clid(new); |
0733d213 AA |
1524 | add_to_unconfirmed(new, strhashval); |
1525 | out_copy: | |
1526 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1527 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1528 | ||
38eb76a5 | 1529 | exid->seqid = 1; |
0733d213 AA |
1530 | nfsd4_set_ex_flags(new, exid); |
1531 | ||
1532 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1533 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1534 | status = nfs_ok; |
1535 | ||
1536 | out: | |
1537 | nfs4_unlock_state(); | |
1538 | error: | |
1539 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1540 | return status; | |
069b6ad4 AA |
1541 | } |
1542 | ||
b85d4c01 | 1543 | static int |
88e588d5 | 1544 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1545 | { |
88e588d5 AA |
1546 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1547 | slot_seqid); | |
b85d4c01 BH |
1548 | |
1549 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1550 | if (slot_inuse) { |
1551 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1552 | return nfserr_jukebox; |
1553 | else | |
1554 | return nfserr_seq_misordered; | |
1555 | } | |
1556 | /* Normal */ | |
88e588d5 | 1557 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1558 | return nfs_ok; |
1559 | /* Replay */ | |
88e588d5 | 1560 | if (seqid == slot_seqid) |
b85d4c01 BH |
1561 | return nfserr_replay_cache; |
1562 | /* Wraparound */ | |
88e588d5 | 1563 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1564 | return nfs_ok; |
1565 | /* Misordered replay or misordered new request */ | |
1566 | return nfserr_seq_misordered; | |
1567 | } | |
1568 | ||
49557cc7 AA |
1569 | /* |
1570 | * Cache the create session result into the create session single DRC | |
1571 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1572 | * Do this for solo or embedded create session operations. | |
1573 | */ | |
1574 | static void | |
1575 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1576 | struct nfsd4_clid_slot *slot, int nfserr) | |
1577 | { | |
1578 | slot->sl_status = nfserr; | |
1579 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1580 | } | |
1581 | ||
1582 | static __be32 | |
1583 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1584 | struct nfsd4_clid_slot *slot) | |
1585 | { | |
1586 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1587 | return slot->sl_status; | |
1588 | } | |
1589 | ||
1b74c25b MJ |
1590 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1591 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1592 | 1 + /* MIN tag is length with zero, only length */ \ | |
1593 | 3 + /* version, opcount, opcode */ \ | |
1594 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1595 | /* seqid, slotID, slotID, cache */ \ | |
1596 | 4 ) * sizeof(__be32)) | |
1597 | ||
1598 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1599 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1600 | 1 + /* status */ \ | |
1601 | 1 + /* MIN tag is length with zero, only length */ \ | |
1602 | 3 + /* opcount, opcode, opstatus*/ \ | |
1603 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1604 | /* seqid, slotID, slotID, slotID, status */ \ | |
1605 | 5 ) * sizeof(__be32)) | |
1606 | ||
1607 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1608 | { | |
1609 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1610 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1611 | } | |
1612 | ||
069b6ad4 AA |
1613 | __be32 |
1614 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1615 | struct nfsd4_compound_state *cstate, | |
1616 | struct nfsd4_create_session *cr_ses) | |
1617 | { | |
363168b4 | 1618 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1619 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1620 | struct nfsd4_session *new; |
49557cc7 | 1621 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1622 | bool confirm_me = false; |
ec6b5d7b AA |
1623 | int status = 0; |
1624 | ||
a62573dc MJ |
1625 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1626 | return nfserr_inval; | |
1627 | ||
ec6b5d7b AA |
1628 | nfs4_lock_state(); |
1629 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1630 | conf = find_confirmed_client(&cr_ses->clientid); | |
1631 | ||
1632 | if (conf) { | |
49557cc7 AA |
1633 | cs_slot = &conf->cl_cs_slot; |
1634 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1635 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1636 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1637 | cs_slot->sl_seqid); |
38eb76a5 | 1638 | /* Return the cached reply status */ |
49557cc7 | 1639 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1640 | goto out; |
49557cc7 | 1641 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1642 | status = nfserr_seq_misordered; |
1643 | dprintk("Sequence misordered!\n"); | |
1644 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1645 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1646 | goto out; |
1647 | } | |
ec6b5d7b AA |
1648 | } else if (unconf) { |
1649 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1650 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1651 | status = nfserr_clid_inuse; |
1652 | goto out; | |
1653 | } | |
1654 | ||
49557cc7 AA |
1655 | cs_slot = &unconf->cl_cs_slot; |
1656 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1657 | if (status) { |
1658 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1659 | status = nfserr_seq_misordered; |
cd5b8144 | 1660 | goto out; |
ec6b5d7b AA |
1661 | } |
1662 | ||
86c3e16c | 1663 | confirm_me = true; |
ec6b5d7b AA |
1664 | conf = unconf; |
1665 | } else { | |
1666 | status = nfserr_stale_clientid; | |
1667 | goto out; | |
1668 | } | |
1669 | ||
8323c3b2 BF |
1670 | /* |
1671 | * XXX: we should probably set this at creation time, and check | |
1672 | * for consistent minorversion use throughout: | |
1673 | */ | |
1674 | conf->cl_minorversion = 1; | |
408b79bc BF |
1675 | /* |
1676 | * We do not support RDMA or persistent sessions | |
1677 | */ | |
1678 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1679 | cr_ses->flags &= ~SESSION4_RDMA; | |
1680 | ||
1b74c25b MJ |
1681 | status = nfserr_toosmall; |
1682 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1683 | goto out; | |
1684 | ||
ac7c46f2 BF |
1685 | status = nfserr_jukebox; |
1686 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1687 | if (!new) | |
ec6b5d7b | 1688 | goto out; |
ac7c46f2 BF |
1689 | status = nfs_ok; |
1690 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1691 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1692 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1693 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1694 | cs_slot->sl_seqid++; |
49557cc7 | 1695 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1696 | |
49557cc7 AA |
1697 | /* cache solo and embedded create sessions under the state lock */ |
1698 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1699 | if (confirm_me) |
1700 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1701 | out: |
1702 | nfs4_unlock_state(); | |
1703 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1704 | return status; | |
069b6ad4 AA |
1705 | } |
1706 | ||
57716355 BF |
1707 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1708 | { | |
1709 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1710 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1711 | ||
1712 | return argp->opcnt == resp->opcnt; | |
1713 | } | |
1714 | ||
1d1bc8f2 BF |
1715 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1716 | { | |
1717 | switch (*dir) { | |
1718 | case NFS4_CDFC4_FORE: | |
1719 | case NFS4_CDFC4_BACK: | |
1720 | return nfs_ok; | |
1721 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1722 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1723 | *dir = NFS4_CDFC4_BOTH; | |
1724 | return nfs_ok; | |
1725 | }; | |
1726 | return nfserr_inval; | |
1727 | } | |
1728 | ||
1729 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1730 | struct nfsd4_compound_state *cstate, | |
1731 | struct nfsd4_bind_conn_to_session *bcts) | |
1732 | { | |
1733 | __be32 status; | |
1734 | ||
1735 | if (!nfsd4_last_compound_op(rqstp)) | |
1736 | return nfserr_not_only_op; | |
1737 | spin_lock(&client_lock); | |
1738 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1739 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1740 | * client_lock iself: */ | |
1741 | if (cstate->session) { | |
1742 | nfsd4_get_session(cstate->session); | |
1743 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1744 | } | |
1745 | spin_unlock(&client_lock); | |
1746 | if (!cstate->session) | |
1747 | return nfserr_badsession; | |
1748 | ||
1749 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1750 | if (!status) |
1751 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1752 | return status; | |
1d1bc8f2 BF |
1753 | } |
1754 | ||
5d4cec2f BF |
1755 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1756 | { | |
1757 | if (!session) | |
1758 | return 0; | |
1759 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1760 | } | |
1761 | ||
069b6ad4 AA |
1762 | __be32 |
1763 | nfsd4_destroy_session(struct svc_rqst *r, | |
1764 | struct nfsd4_compound_state *cstate, | |
1765 | struct nfsd4_destroy_session *sessionid) | |
1766 | { | |
e10e0cfc BH |
1767 | struct nfsd4_session *ses; |
1768 | u32 status = nfserr_badsession; | |
1769 | ||
1770 | /* Notes: | |
1771 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1772 | * - Should we return nfserr_back_chan_busy if waiting for | |
1773 | * callbacks on to-be-destroyed session? | |
1774 | * - Do we need to clear any callback info from previous session? | |
1775 | */ | |
1776 | ||
5d4cec2f | 1777 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1778 | if (!nfsd4_last_compound_op(r)) |
1779 | return nfserr_not_only_op; | |
1780 | } | |
e10e0cfc | 1781 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1782 | spin_lock(&client_lock); |
e10e0cfc BH |
1783 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1784 | if (!ses) { | |
9089f1b4 | 1785 | spin_unlock(&client_lock); |
e10e0cfc BH |
1786 | goto out; |
1787 | } | |
1788 | ||
1789 | unhash_session(ses); | |
9089f1b4 | 1790 | spin_unlock(&client_lock); |
e10e0cfc | 1791 | |
ab707e15 | 1792 | nfs4_lock_state(); |
84f5f7cc | 1793 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1794 | nfs4_unlock_state(); |
19cf5c02 BF |
1795 | |
1796 | nfsd4_del_conns(ses); | |
1797 | ||
e10e0cfc BH |
1798 | nfsd4_put_session(ses); |
1799 | status = nfs_ok; | |
1800 | out: | |
1801 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1802 | return status; | |
069b6ad4 AA |
1803 | } |
1804 | ||
a663bdd8 | 1805 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1806 | { |
1807 | struct nfsd4_conn *c; | |
1808 | ||
1809 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1810 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1811 | return c; |
1812 | } | |
1813 | } | |
1814 | return NULL; | |
1815 | } | |
1816 | ||
a663bdd8 | 1817 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1818 | { |
1819 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1820 | struct nfsd4_conn *c; |
21b75b01 | 1821 | int ret; |
328ead28 BF |
1822 | |
1823 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1824 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1825 | if (c) { |
1826 | spin_unlock(&clp->cl_lock); | |
1827 | free_conn(new); | |
1828 | return; | |
1829 | } | |
1830 | __nfsd4_hash_conn(new, ses); | |
1831 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1832 | ret = nfsd4_register_conn(new); |
1833 | if (ret) | |
1834 | /* oops; xprt is already down: */ | |
1835 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1836 | return; |
1837 | } | |
1838 | ||
868b89c3 MJ |
1839 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1840 | { | |
1841 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1842 | ||
1843 | return args->opcnt > session->se_fchannel.maxops; | |
1844 | } | |
1845 | ||
ae82a8d0 MJ |
1846 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1847 | struct nfsd4_session *session) | |
1848 | { | |
1849 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1850 | ||
1851 | return xb->len > session->se_fchannel.maxreq_sz; | |
1852 | } | |
1853 | ||
069b6ad4 | 1854 | __be32 |
b85d4c01 | 1855 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1856 | struct nfsd4_compound_state *cstate, |
1857 | struct nfsd4_sequence *seq) | |
1858 | { | |
f9bb94c4 | 1859 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1860 | struct nfsd4_session *session; |
1861 | struct nfsd4_slot *slot; | |
a663bdd8 | 1862 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1863 | int status; |
1864 | ||
f9bb94c4 AA |
1865 | if (resp->opcnt != 1) |
1866 | return nfserr_sequence_pos; | |
1867 | ||
a663bdd8 BF |
1868 | /* |
1869 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1870 | * below. | |
1871 | */ | |
1872 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1873 | if (!conn) | |
1874 | return nfserr_jukebox; | |
1875 | ||
9089f1b4 | 1876 | spin_lock(&client_lock); |
b85d4c01 BH |
1877 | status = nfserr_badsession; |
1878 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1879 | if (!session) | |
1880 | goto out; | |
1881 | ||
868b89c3 MJ |
1882 | status = nfserr_too_many_ops; |
1883 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1884 | goto out; | |
1885 | ||
ae82a8d0 MJ |
1886 | status = nfserr_req_too_big; |
1887 | if (nfsd4_request_too_big(rqstp, session)) | |
1888 | goto out; | |
1889 | ||
b85d4c01 | 1890 | status = nfserr_badslot; |
6c18ba9f | 1891 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1892 | goto out; |
1893 | ||
557ce264 | 1894 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1895 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1896 | ||
a8dfdaeb AA |
1897 | /* We do not negotiate the number of slots yet, so set the |
1898 | * maxslots to the session maxreqs which is used to encode | |
1899 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1900 | seq->maxslots = session->se_fchannel.maxreqs; | |
1901 | ||
88e588d5 | 1902 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1903 | if (status == nfserr_replay_cache) { |
1904 | cstate->slot = slot; | |
1905 | cstate->session = session; | |
da3846a2 | 1906 | /* Return the cached reply status and set cstate->status |
557ce264 | 1907 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1908 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1909 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1910 | goto out; |
b85d4c01 BH |
1911 | } |
1912 | if (status) | |
1913 | goto out; | |
1914 | ||
a663bdd8 BF |
1915 | nfsd4_sequence_check_conn(conn, session); |
1916 | conn = NULL; | |
328ead28 | 1917 | |
b85d4c01 BH |
1918 | /* Success! bump slot seqid */ |
1919 | slot->sl_inuse = true; | |
1920 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1921 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1922 | |
1923 | cstate->slot = slot; | |
1924 | cstate->session = session; | |
1925 | ||
b85d4c01 | 1926 | out: |
26c0c75e | 1927 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1928 | if (cstate->session) { |
0d7bb719 BF |
1929 | struct nfs4_client *clp = session->se_client; |
1930 | ||
36acb66b | 1931 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1932 | atomic_inc(&clp->cl_refcount); |
1933 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1934 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1935 | } |
a663bdd8 | 1936 | kfree(conn); |
36acb66b | 1937 | spin_unlock(&client_lock); |
b85d4c01 BH |
1938 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1939 | return status; | |
069b6ad4 AA |
1940 | } |
1941 | ||
4dc6ec00 BF |
1942 | __be32 |
1943 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1944 | { | |
bcecf1cc MJ |
1945 | int status = 0; |
1946 | ||
4dc6ec00 BF |
1947 | if (rc->rca_one_fs) { |
1948 | if (!cstate->current_fh.fh_dentry) | |
1949 | return nfserr_nofilehandle; | |
1950 | /* | |
1951 | * We don't take advantage of the rca_one_fs case. | |
1952 | * That's OK, it's optional, we can safely ignore it. | |
1953 | */ | |
1954 | return nfs_ok; | |
1955 | } | |
bcecf1cc | 1956 | |
4dc6ec00 | 1957 | nfs4_lock_state(); |
bcecf1cc MJ |
1958 | status = nfserr_complete_already; |
1959 | if (cstate->session->se_client->cl_firststate) | |
1960 | goto out; | |
1961 | ||
1962 | status = nfserr_stale_clientid; | |
1963 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1964 | /* |
1965 | * The following error isn't really legal. | |
1966 | * But we only get here if the client just explicitly | |
1967 | * destroyed the client. Surely it no longer cares what | |
1968 | * error it gets back on an operation for the dead | |
1969 | * client. | |
1970 | */ | |
bcecf1cc MJ |
1971 | goto out; |
1972 | ||
1973 | status = nfs_ok; | |
4dc6ec00 | 1974 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1975 | out: |
4dc6ec00 | 1976 | nfs4_unlock_state(); |
bcecf1cc | 1977 | return status; |
4dc6ec00 BF |
1978 | } |
1979 | ||
b37ad28b | 1980 | __be32 |
b591480b BF |
1981 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1982 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1983 | { |
a084daf5 | 1984 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
1985 | nfs4_verifier clverifier = setclid->se_verf; |
1986 | unsigned int strhashval; | |
28ce6054 | 1987 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1988 | __be32 status; |
a55370a3 | 1989 | char dname[HEXDIR_LEN]; |
1da177e4 | 1990 | |
a55370a3 N |
1991 | status = nfs4_make_rec_clidname(dname, &clname); |
1992 | if (status) | |
73aea4ec | 1993 | return status; |
a55370a3 | 1994 | |
1da177e4 LT |
1995 | /* |
1996 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1997 | * We get here on a DRC miss. | |
1998 | */ | |
1999 | ||
a55370a3 | 2000 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2001 | |
1da177e4 | 2002 | nfs4_lock_state(); |
e203d506 | 2003 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2004 | if (conf) { |
a186e767 | 2005 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2006 | status = nfserr_clid_inuse; |
e203d506 BF |
2007 | if (clp_used_exchangeid(conf)) |
2008 | goto out; | |
026722c2 | 2009 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2010 | char addr_str[INET6_ADDRSTRLEN]; |
2011 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2012 | sizeof(addr_str)); | |
2013 | dprintk("NFSD: setclientid: string in use by client " | |
2014 | "at %s\n", addr_str); | |
1da177e4 LT |
2015 | goto out; |
2016 | } | |
1da177e4 | 2017 | } |
a186e767 BF |
2018 | /* |
2019 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2020 | * has a description of SETCLIENTID request processing consisting | |
2021 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2022 | */ | |
e203d506 | 2023 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2024 | status = nfserr_jukebox; |
1da177e4 | 2025 | if (!conf) { |
a186e767 BF |
2026 | /* |
2027 | * RFC 3530 14.2.33 CASE 4: | |
2028 | * placed first, because it is the normal case | |
1da177e4 LT |
2029 | */ |
2030 | if (unconf) | |
2031 | expire_client(unconf); | |
b09333c4 | 2032 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2033 | if (new == NULL) |
1da177e4 | 2034 | goto out; |
1da177e4 | 2035 | gen_clid(new); |
599e0a22 | 2036 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2037 | /* |
a186e767 BF |
2038 | * RFC 3530 14.2.33 CASE 1: |
2039 | * probable callback update | |
1da177e4 | 2040 | */ |
31f4a6c1 N |
2041 | if (unconf) { |
2042 | /* Note this is removing unconfirmed {*x***}, | |
2043 | * which is stronger than RFC recommended {vxc**}. | |
2044 | * This has the advantage that there is at most | |
2045 | * one {*x***} in either list at any time. | |
2046 | */ | |
2047 | expire_client(unconf); | |
1da177e4 | 2048 | } |
b09333c4 | 2049 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2050 | if (new == NULL) |
1da177e4 | 2051 | goto out; |
1da177e4 | 2052 | copy_clid(new, conf); |
1da177e4 LT |
2053 | } else if (!unconf) { |
2054 | /* | |
a186e767 BF |
2055 | * RFC 3530 14.2.33 CASE 2: |
2056 | * probable client reboot; state will be removed if | |
2057 | * confirmed. | |
1da177e4 | 2058 | */ |
b09333c4 | 2059 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2060 | if (new == NULL) |
1da177e4 | 2061 | goto out; |
1da177e4 | 2062 | gen_clid(new); |
49ba8781 | 2063 | } else { |
a186e767 BF |
2064 | /* |
2065 | * RFC 3530 14.2.33 CASE 3: | |
2066 | * probable client reboot; state will be removed if | |
2067 | * confirmed. | |
1da177e4 LT |
2068 | */ |
2069 | expire_client(unconf); | |
b09333c4 | 2070 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2071 | if (new == NULL) |
1da177e4 | 2072 | goto out; |
1da177e4 | 2073 | gen_clid(new); |
1da177e4 | 2074 | } |
8323c3b2 BF |
2075 | /* |
2076 | * XXX: we should probably set this at creation time, and check | |
2077 | * for consistent minorversion use throughout: | |
2078 | */ | |
2079 | new->cl_minorversion = 0; | |
6f3d772f | 2080 | gen_callback(new, setclid, rqstp); |
c175b83c | 2081 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2082 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2083 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2084 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2085 | status = nfs_ok; | |
2086 | out: | |
2087 | nfs4_unlock_state(); | |
2088 | return status; | |
2089 | } | |
2090 | ||
2091 | ||
2092 | /* | |
a186e767 BF |
2093 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2094 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2095 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2096 | */ |
b37ad28b | 2097 | __be32 |
b591480b BF |
2098 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2099 | struct nfsd4_compound_state *cstate, | |
2100 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2101 | { |
363168b4 | 2102 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2103 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2104 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2105 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2106 | __be32 status; |
1da177e4 LT |
2107 | |
2108 | if (STALE_CLIENTID(clid)) | |
2109 | return nfserr_stale_clientid; | |
2110 | /* | |
2111 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2112 | * We get here on a DRC miss. | |
2113 | */ | |
2114 | ||
2115 | nfs4_lock_state(); | |
21ab45a4 N |
2116 | |
2117 | conf = find_confirmed_client(clid); | |
2118 | unconf = find_unconfirmed_client(clid); | |
2119 | ||
2120 | status = nfserr_clid_inuse; | |
363168b4 | 2121 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2122 | goto out; |
363168b4 | 2123 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2124 | goto out; |
2125 | ||
a186e767 BF |
2126 | /* |
2127 | * section 14.2.34 of RFC 3530 has a description of | |
2128 | * SETCLIENTID_CONFIRM request processing consisting | |
2129 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2130 | */ | |
366e0c1d | 2131 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2132 | /* |
2133 | * RFC 3530 14.2.34 CASE 1: | |
2134 | * callback update | |
2135 | */ | |
599e0a22 | 2136 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2137 | status = nfserr_clid_inuse; |
2138 | else { | |
5a3c9d71 BF |
2139 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2140 | nfsd4_probe_callback(conf); | |
1a69c179 | 2141 | expire_client(unconf); |
1da177e4 | 2142 | status = nfs_ok; |
1a69c179 | 2143 | |
1da177e4 | 2144 | } |
f3aba4e5 | 2145 | } else if (conf && !unconf) { |
a186e767 BF |
2146 | /* |
2147 | * RFC 3530 14.2.34 CASE 2: | |
2148 | * probable retransmitted request; play it safe and | |
2149 | * do nothing. | |
7c79f737 | 2150 | */ |
599e0a22 | 2151 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2152 | status = nfserr_clid_inuse; |
21ab45a4 | 2153 | else |
1da177e4 | 2154 | status = nfs_ok; |
7c79f737 | 2155 | } else if (!conf && unconf |
599e0a22 | 2156 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2157 | /* |
2158 | * RFC 3530 14.2.34 CASE 3: | |
2159 | * Normal case; new or rebooted client: | |
7c79f737 | 2160 | */ |
599e0a22 | 2161 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2162 | status = nfserr_clid_inuse; |
2163 | } else { | |
1a69c179 N |
2164 | unsigned int hash = |
2165 | clientstr_hashval(unconf->cl_recdir); | |
2166 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2167 | hash); |
1a69c179 | 2168 | if (conf) { |
c7b9a459 | 2169 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2170 | expire_client(conf); |
2171 | } | |
1da177e4 | 2172 | move_to_confirmed(unconf); |
21ab45a4 | 2173 | conf = unconf; |
5a3c9d71 | 2174 | nfsd4_probe_callback(conf); |
1a69c179 | 2175 | status = nfs_ok; |
1da177e4 | 2176 | } |
599e0a22 BF |
2177 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2178 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2179 | &confirm)))) { |
a186e767 BF |
2180 | /* |
2181 | * RFC 3530 14.2.34 CASE 4: | |
2182 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2183 | */ |
1da177e4 | 2184 | status = nfserr_stale_clientid; |
7c79f737 | 2185 | } else { |
08e8987c N |
2186 | /* check that we have hit one of the cases...*/ |
2187 | status = nfserr_clid_inuse; | |
2188 | } | |
1da177e4 | 2189 | out: |
1da177e4 LT |
2190 | nfs4_unlock_state(); |
2191 | return status; | |
2192 | } | |
2193 | ||
1da177e4 LT |
2194 | /* OPEN Share state helper functions */ |
2195 | static inline struct nfs4_file * | |
2196 | alloc_init_file(struct inode *ino) | |
2197 | { | |
2198 | struct nfs4_file *fp; | |
2199 | unsigned int hashval = file_hashval(ino); | |
2200 | ||
e60d4398 N |
2201 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2202 | if (fp) { | |
8b671b80 | 2203 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2204 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2205 | INIT_LIST_HEAD(&fp->fi_stateids); |
2206 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 | 2207 | fp->fi_inode = igrab(ino); |
47f9940c | 2208 | fp->fi_had_conflict = false; |
acfdf5c3 | 2209 | fp->fi_lease = NULL; |
f9d7562f BF |
2210 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2211 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2212 | spin_lock(&recall_lock); |
2213 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2214 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2215 | return fp; |
2216 | } | |
2217 | return NULL; | |
2218 | } | |
2219 | ||
e60d4398 | 2220 | static void |
e18b890b | 2221 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2222 | { |
e60d4398 N |
2223 | if (*slab == NULL) |
2224 | return; | |
1a1d92c1 | 2225 | kmem_cache_destroy(*slab); |
e60d4398 | 2226 | *slab = NULL; |
1da177e4 LT |
2227 | } |
2228 | ||
e8ff2a84 | 2229 | void |
1da177e4 LT |
2230 | nfsd4_free_slabs(void) |
2231 | { | |
fe0750e5 BF |
2232 | nfsd4_free_slab(&openowner_slab); |
2233 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2234 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2235 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2236 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2237 | } |
1da177e4 | 2238 | |
e60d4398 N |
2239 | static int |
2240 | nfsd4_init_slabs(void) | |
2241 | { | |
fe0750e5 BF |
2242 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2243 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2244 | if (openowner_slab == NULL) | |
2245 | goto out_nomem; | |
2246 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2247 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2248 | if (lockowner_slab == NULL) | |
e60d4398 N |
2249 | goto out_nomem; |
2250 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2251 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2252 | if (file_slab == NULL) |
2253 | goto out_nomem; | |
5ac049ac | 2254 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2255 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2256 | if (stateid_slab == NULL) |
2257 | goto out_nomem; | |
5b2d21c1 | 2258 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2259 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2260 | if (deleg_slab == NULL) |
2261 | goto out_nomem; | |
e60d4398 N |
2262 | return 0; |
2263 | out_nomem: | |
2264 | nfsd4_free_slabs(); | |
2265 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2266 | return -ENOMEM; | |
1da177e4 LT |
2267 | } |
2268 | ||
fe0750e5 BF |
2269 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2270 | { | |
2271 | kfree(oo->oo_owner.so_owner.data); | |
2272 | kmem_cache_free(openowner_slab, oo); | |
2273 | } | |
2274 | ||
2275 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2276 | { |
fe0750e5 BF |
2277 | kfree(lo->lo_owner.so_owner.data); |
2278 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2279 | } |
2280 | ||
ff194bd9 | 2281 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2282 | { |
ff194bd9 BF |
2283 | rp->rp_status = nfserr_serverfault; |
2284 | rp->rp_buflen = 0; | |
2285 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2286 | } |
2287 | ||
fe0750e5 | 2288 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2289 | { |
1da177e4 | 2290 | struct nfs4_stateowner *sop; |
1da177e4 | 2291 | |
fe0750e5 | 2292 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2293 | if (!sop) |
2294 | return NULL; | |
2295 | ||
2296 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2297 | if (!sop->so_owner.data) { | |
fe0750e5 | 2298 | kmem_cache_free(slab, sop); |
1da177e4 | 2299 | return NULL; |
ff194bd9 BF |
2300 | } |
2301 | sop->so_owner.len = owner->len; | |
2302 | ||
ea1da636 | 2303 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2304 | sop->so_client = clp; |
2305 | init_nfs4_replay(&sop->so_replay); | |
2306 | return sop; | |
2307 | } | |
2308 | ||
fe0750e5 | 2309 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2310 | { |
fe0750e5 BF |
2311 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); |
2312 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2313 | } |
2314 | ||
fe0750e5 | 2315 | static struct nfs4_openowner * |
ff194bd9 | 2316 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2317 | struct nfs4_openowner *oo; |
ff194bd9 | 2318 | |
fe0750e5 BF |
2319 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2320 | if (!oo) | |
ff194bd9 | 2321 | return NULL; |
fe0750e5 BF |
2322 | oo->oo_owner.so_is_open_owner = 1; |
2323 | oo->oo_owner.so_seqid = open->op_seqid; | |
dad1c067 | 2324 | oo->oo_flags = 0; |
fe0750e5 | 2325 | oo->oo_time = 0; |
38c387b5 | 2326 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2327 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2328 | hash_openowner(oo, clp, strhashval); | |
2329 | return oo; | |
1da177e4 LT |
2330 | } |
2331 | ||
6136d2b4 | 2332 | static inline __be32 init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2333 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2334 | struct nfs4_client *clp = oo->oo_owner.so_client; |
6136d2b4 | 2335 | __be32 status; |
1da177e4 | 2336 | |
6136d2b4 BF |
2337 | status = init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
2338 | if (status) | |
2339 | return status; | |
ea1da636 | 2340 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2341 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2342 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2343 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2344 | get_nfs4_file(fp); |
1da177e4 | 2345 | stp->st_file = fp; |
1da177e4 LT |
2346 | stp->st_access_bmap = 0; |
2347 | stp->st_deny_bmap = 0; | |
b6d2f1ca | 2348 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1da177e4 | 2349 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2350 | stp->st_openstp = NULL; |
6136d2b4 | 2351 | return nfs_ok; |
1da177e4 LT |
2352 | } |
2353 | ||
fd39ca9a | 2354 | static void |
fe0750e5 | 2355 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2356 | { |
fe0750e5 | 2357 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2358 | |
fe0750e5 BF |
2359 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2360 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2361 | } |
2362 | ||
1da177e4 | 2363 | static int |
599e0a22 BF |
2364 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2365 | clientid_t *clid) | |
2366 | { | |
2367 | return (sop->so_owner.len == owner->len) && | |
2368 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2369 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2370 | } |
2371 | ||
fe0750e5 | 2372 | static struct nfs4_openowner * |
1da177e4 LT |
2373 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2374 | { | |
2375 | struct nfs4_stateowner *so = NULL; | |
2376 | ||
506f275f | 2377 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2378 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2379 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2380 | } |
2381 | return NULL; | |
2382 | } | |
2383 | ||
2384 | /* search file_hashtbl[] for file */ | |
2385 | static struct nfs4_file * | |
2386 | find_file(struct inode *ino) | |
2387 | { | |
2388 | unsigned int hashval = file_hashval(ino); | |
2389 | struct nfs4_file *fp; | |
2390 | ||
8b671b80 | 2391 | spin_lock(&recall_lock); |
1da177e4 | 2392 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2393 | if (fp->fi_inode == ino) { |
2394 | get_nfs4_file(fp); | |
8b671b80 | 2395 | spin_unlock(&recall_lock); |
1da177e4 | 2396 | return fp; |
13cd2184 | 2397 | } |
1da177e4 | 2398 | } |
8b671b80 | 2399 | spin_unlock(&recall_lock); |
1da177e4 LT |
2400 | return NULL; |
2401 | } | |
2402 | ||
1da177e4 LT |
2403 | /* |
2404 | * Called to check deny when READ with all zero stateid or | |
2405 | * WRITE with all zero or all one stateid | |
2406 | */ | |
b37ad28b | 2407 | static __be32 |
1da177e4 LT |
2408 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2409 | { | |
2410 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2411 | struct nfs4_file *fp; | |
dcef0413 | 2412 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2413 | __be32 ret; |
1da177e4 LT |
2414 | |
2415 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2416 | ||
2417 | fp = find_file(ino); | |
13cd2184 N |
2418 | if (!fp) |
2419 | return nfs_ok; | |
b700949b | 2420 | ret = nfserr_locked; |
1da177e4 | 2421 | /* Search for conflicting share reservations */ |
13cd2184 N |
2422 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2423 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2424 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2425 | goto out; | |
1da177e4 | 2426 | } |
13cd2184 N |
2427 | ret = nfs_ok; |
2428 | out: | |
2429 | put_nfs4_file(fp); | |
2430 | return ret; | |
1da177e4 LT |
2431 | } |
2432 | ||
6b57d9c8 | 2433 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2434 | { |
1da177e4 LT |
2435 | /* We're assuming the state code never drops its reference |
2436 | * without first removing the lease. Since we're in this lease | |
2437 | * callback (and since the lease code is serialized by the kernel | |
2438 | * lock) we know the server hasn't removed the lease yet, we know | |
2439 | * it's safe to take a reference: */ | |
2440 | atomic_inc(&dp->dl_count); | |
2441 | ||
1da177e4 | 2442 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2443 | |
460781b5 | 2444 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2445 | dp->dl_time = get_seconds(); |
2446 | ||
6b57d9c8 BF |
2447 | nfsd4_cb_recall(dp); |
2448 | } | |
2449 | ||
acfdf5c3 | 2450 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2451 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2452 | { | |
acfdf5c3 BF |
2453 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2454 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2455 | |
acfdf5c3 BF |
2456 | BUG_ON(!fp); |
2457 | /* We assume break_lease is only called once per lease: */ | |
2458 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2459 | /* |
2460 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2461 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2462 | * in time: |
0272e1fd BF |
2463 | */ |
2464 | fl->fl_break_time = 0; | |
1da177e4 | 2465 | |
5d926e8c | 2466 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2467 | fp->fi_had_conflict = true; |
2468 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2469 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2470 | spin_unlock(&recall_lock); |
1da177e4 LT |
2471 | } |
2472 | ||
1da177e4 LT |
2473 | static |
2474 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2475 | { | |
2476 | if (arg & F_UNLCK) | |
2477 | return lease_modify(onlist, arg); | |
2478 | else | |
2479 | return -EAGAIN; | |
2480 | } | |
2481 | ||
7b021967 | 2482 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2483 | .lm_break = nfsd_break_deleg_cb, |
2484 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2485 | }; |
2486 | ||
7a8711c9 BF |
2487 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2488 | { | |
2489 | if (nfsd4_has_session(cstate)) | |
2490 | return nfs_ok; | |
2491 | if (seqid == so->so_seqid - 1) | |
2492 | return nfserr_replay_me; | |
2493 | if (seqid == so->so_seqid) | |
2494 | return nfs_ok; | |
2495 | return nfserr_bad_seqid; | |
2496 | } | |
1da177e4 | 2497 | |
b37ad28b | 2498 | __be32 |
6668958f AA |
2499 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2500 | struct nfsd4_open *open) | |
1da177e4 | 2501 | { |
1da177e4 LT |
2502 | clientid_t *clientid = &open->op_clientid; |
2503 | struct nfs4_client *clp = NULL; | |
2504 | unsigned int strhashval; | |
fe0750e5 | 2505 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2506 | __be32 status; |
1da177e4 | 2507 | |
1da177e4 LT |
2508 | if (STALE_CLIENTID(&open->op_clientid)) |
2509 | return nfserr_stale_clientid; | |
2510 | ||
506f275f | 2511 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2512 | oo = find_openstateowner_str(strhashval, open); |
2513 | open->op_openowner = oo; | |
2514 | if (!oo) { | |
0f442aa2 | 2515 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2516 | clp = find_confirmed_client(clientid); |
2517 | if (clp == NULL) | |
0f442aa2 BF |
2518 | return nfserr_expired; |
2519 | goto renew; | |
1da177e4 | 2520 | } |
dad1c067 | 2521 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2522 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2523 | clp = oo->oo_owner.so_client; |
2524 | release_openowner(oo); | |
2525 | open->op_openowner = NULL; | |
0f442aa2 BF |
2526 | goto renew; |
2527 | } | |
fe0750e5 | 2528 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2529 | if (status) |
2530 | return status; | |
1da177e4 | 2531 | renew: |
fe0750e5 BF |
2532 | if (open->op_openowner == NULL) { |
2533 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2534 | if (oo == NULL) | |
3e772463 | 2535 | return nfserr_jukebox; |
fe0750e5 | 2536 | open->op_openowner = oo; |
0f442aa2 | 2537 | } |
fe0750e5 BF |
2538 | list_del_init(&oo->oo_close_lru); |
2539 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2540 | return nfs_ok; |
1da177e4 LT |
2541 | } |
2542 | ||
b37ad28b | 2543 | static inline __be32 |
4a6e43e6 N |
2544 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2545 | { | |
2546 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2547 | return nfserr_openmode; | |
2548 | else | |
2549 | return nfs_ok; | |
2550 | } | |
2551 | ||
f459e453 | 2552 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2553 | { |
f459e453 | 2554 | share_access &= ~NFS4_SHARE_WANT_MASK; |
52f4fb43 | 2555 | |
f459e453 | 2556 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2557 | } |
2558 | ||
38c2f4b1 | 2559 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2560 | { |
f459e453 | 2561 | struct nfs4_stid *ret; |
24a0111e | 2562 | |
38c2f4b1 | 2563 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2564 | if (!ret) |
2565 | return NULL; | |
2566 | return delegstateid(ret); | |
24a0111e BF |
2567 | } |
2568 | ||
b37ad28b | 2569 | static __be32 |
38c2f4b1 | 2570 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2571 | struct nfs4_delegation **dp) |
2572 | { | |
2573 | int flags; | |
b37ad28b | 2574 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2575 | |
38c2f4b1 | 2576 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2577 | if (*dp == NULL) |
c44c5eeb | 2578 | goto out; |
24a0111e | 2579 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2580 | status = nfs4_check_delegmode(*dp, flags); |
2581 | if (status) | |
2582 | *dp = NULL; | |
c44c5eeb N |
2583 | out: |
2584 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2585 | return nfs_ok; | |
2586 | if (status) | |
2587 | return status; | |
dad1c067 | 2588 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2589 | return nfs_ok; |
567d9829 N |
2590 | } |
2591 | ||
b37ad28b | 2592 | static __be32 |
dcef0413 | 2593 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2594 | { |
dcef0413 | 2595 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2596 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2597 | |
8beefa24 | 2598 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2599 | /* ignore lock owners */ |
2600 | if (local->st_stateowner->so_is_open_owner == 0) | |
2601 | continue; | |
2602 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2603 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2604 | *stpp = local; |
2605 | /* check for conflicting share reservations */ | |
2606 | if (!test_share(local, open)) | |
77eaae8d | 2607 | return nfserr_share_denied; |
1da177e4 | 2608 | } |
77eaae8d | 2609 | return nfs_ok; |
1da177e4 LT |
2610 | } |
2611 | ||
dcef0413 | 2612 | static inline struct nfs4_ol_stateid * |
5ac049ac N |
2613 | nfs4_alloc_stateid(void) |
2614 | { | |
2615 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2616 | } | |
2617 | ||
21fb4016 BF |
2618 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2619 | { | |
2620 | int flags = 0; | |
2621 | ||
2622 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2623 | flags |= NFSD_MAY_READ; | |
2624 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2625 | flags |= NFSD_MAY_WRITE; | |
2626 | return flags; | |
2627 | } | |
2628 | ||
0c12eaff CB |
2629 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2630 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2631 | { |
2632 | __be32 status; | |
0c12eaff CB |
2633 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2634 | int access = nfs4_access_to_access(open->op_share_access); | |
2635 | ||
2636 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2637 | * allowing it to break the lease and return EAGAIN leaves the | |
2638 | * client unable to make progress in returning the delegation */ | |
2639 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2640 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2641 | |
2642 | if (!fp->fi_fds[oflag]) { | |
2643 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2644 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2645 | if (status) |
2646 | return status; | |
2647 | } | |
2648 | nfs4_file_get_access(fp, oflag); | |
2649 | ||
2650 | return nfs_ok; | |
2651 | } | |
2652 | ||
b37ad28b | 2653 | static __be32 |
dcef0413 | 2654 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_ol_stateid **stpp, |
f9d7562f BF |
2655 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2656 | struct nfsd4_open *open) | |
1da177e4 | 2657 | { |
dcef0413 | 2658 | struct nfs4_ol_stateid *stp; |
f9d7562f | 2659 | __be32 status; |
1da177e4 | 2660 | |
5ac049ac | 2661 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2662 | if (stp == NULL) |
3e772463 | 2663 | return nfserr_jukebox; |
1da177e4 | 2664 | |
0c12eaff | 2665 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2666 | if (status) { |
2667 | kmem_cache_free(stateid_slab, stp); | |
2668 | return status; | |
1da177e4 | 2669 | } |
1da177e4 LT |
2670 | *stpp = stp; |
2671 | return 0; | |
2672 | } | |
2673 | ||
b37ad28b | 2674 | static inline __be32 |
1da177e4 LT |
2675 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2676 | struct nfsd4_open *open) | |
2677 | { | |
2678 | struct iattr iattr = { | |
2679 | .ia_valid = ATTR_SIZE, | |
2680 | .ia_size = 0, | |
2681 | }; | |
2682 | if (!open->op_truncate) | |
2683 | return 0; | |
2684 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2685 | return nfserr_inval; |
1da177e4 LT |
2686 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2687 | } | |
2688 | ||
b37ad28b | 2689 | static __be32 |
dcef0413 | 2690 | 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 | 2691 | { |
b6d2f1ca | 2692 | u32 op_share_access = open->op_share_access; |
7d947842 | 2693 | bool new_access; |
b37ad28b | 2694 | __be32 status; |
1da177e4 | 2695 | |
7d947842 | 2696 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2697 | if (new_access) { |
0c12eaff | 2698 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2699 | if (status) |
2700 | return status; | |
6c26d08f | 2701 | } |
1da177e4 LT |
2702 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2703 | if (status) { | |
f9d7562f | 2704 | if (new_access) { |
f197c271 | 2705 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2706 | nfs4_file_put_access(fp, oflag); |
2707 | } | |
1da177e4 LT |
2708 | return status; |
2709 | } | |
2710 | /* remember the open */ | |
24a0111e | 2711 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2712 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2713 | |
2714 | return nfs_ok; | |
2715 | } | |
2716 | ||
2717 | ||
1da177e4 | 2718 | static void |
37515177 | 2719 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2720 | { |
dad1c067 | 2721 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
fe0750e5 | 2722 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; |
1da177e4 LT |
2723 | } |
2724 | ||
14a24e99 BF |
2725 | /* Should we give out recallable state?: */ |
2726 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2727 | { | |
2728 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2729 | return true; | |
2730 | /* | |
2731 | * In the sessions case, since we don't have to establish a | |
2732 | * separate connection for callbacks, we assume it's OK | |
2733 | * until we hear otherwise: | |
2734 | */ | |
2735 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2736 | } | |
2737 | ||
22d38c4c BF |
2738 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2739 | { | |
2740 | struct file_lock *fl; | |
2741 | ||
2742 | fl = locks_alloc_lock(); | |
2743 | if (!fl) | |
2744 | return NULL; | |
2745 | locks_init_lock(fl); | |
2746 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2747 | fl->fl_flags = FL_LEASE; | |
2748 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2749 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2750 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2751 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2752 | return fl; |
2753 | } | |
2754 | ||
edab9782 BF |
2755 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2756 | { | |
acfdf5c3 | 2757 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2758 | struct file_lock *fl; |
2759 | int status; | |
2760 | ||
2761 | fl = nfs4_alloc_init_lease(dp, flag); | |
2762 | if (!fl) | |
2763 | return -ENOMEM; | |
acfdf5c3 | 2764 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2765 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2766 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2767 | if (status) { |
acfdf5c3 | 2768 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2769 | locks_free_lock(fl); |
2770 | return -ENOMEM; | |
2771 | } | |
acfdf5c3 BF |
2772 | fp->fi_lease = fl; |
2773 | fp->fi_deleg_file = fl->fl_file; | |
2774 | get_file(fp->fi_deleg_file); | |
2775 | atomic_set(&fp->fi_delegees, 1); | |
2776 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2781 | { | |
2782 | struct nfs4_file *fp = dp->dl_file; | |
2783 | ||
2784 | if (!fp->fi_lease) | |
2785 | return nfs4_setlease(dp, flag); | |
2786 | spin_lock(&recall_lock); | |
2787 | if (fp->fi_had_conflict) { | |
2788 | spin_unlock(&recall_lock); | |
2789 | return -EAGAIN; | |
2790 | } | |
2791 | atomic_inc(&fp->fi_delegees); | |
2792 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2793 | spin_unlock(&recall_lock); | |
2a74aba7 | 2794 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2795 | return 0; |
2796 | } | |
2797 | ||
1da177e4 LT |
2798 | /* |
2799 | * Attempt to hand out a delegation. | |
2800 | */ | |
2801 | static void | |
dcef0413 | 2802 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2803 | { |
2804 | struct nfs4_delegation *dp; | |
fe0750e5 | 2805 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2806 | int cb_up; |
1da177e4 LT |
2807 | int status, flag = 0; |
2808 | ||
fe0750e5 | 2809 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2810 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2811 | open->op_recall = 0; |
2812 | switch (open->op_claim_type) { | |
2813 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2814 | if (!cb_up) |
7b190fec N |
2815 | open->op_recall = 1; |
2816 | flag = open->op_delegate_type; | |
2817 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2818 | goto out; | |
2819 | break; | |
2820 | case NFS4_OPEN_CLAIM_NULL: | |
2821 | /* Let's not give out any delegations till everyone's | |
2822 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2823 | if (locks_in_grace()) |
7b190fec | 2824 | goto out; |
dad1c067 | 2825 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2826 | goto out; |
2827 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2828 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2829 | else | |
2830 | flag = NFS4_OPEN_DELEGATE_READ; | |
2831 | break; | |
2832 | default: | |
2833 | goto out; | |
2834 | } | |
1da177e4 | 2835 | |
fe0750e5 | 2836 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2837 | if (dp == NULL) |
2838 | goto out_no_deleg; | |
acfdf5c3 | 2839 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2840 | if (status) |
dd239cc0 | 2841 | goto out_free; |
1da177e4 | 2842 | |
d5477a8d | 2843 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2844 | |
8c10cbdb | 2845 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2846 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 | 2847 | out: |
7b190fec N |
2848 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2849 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2850 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2851 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2852 | open->op_delegate_type = flag; |
dd239cc0 BF |
2853 | return; |
2854 | out_free: | |
acfdf5c3 | 2855 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2856 | out_no_deleg: |
2857 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2858 | goto out; | |
1da177e4 LT |
2859 | } |
2860 | ||
2861 | /* | |
2862 | * called with nfs4_lock_state() held. | |
2863 | */ | |
b37ad28b | 2864 | __be32 |
1da177e4 LT |
2865 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2866 | { | |
6668958f | 2867 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2868 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2869 | struct nfs4_file *fp = NULL; |
2870 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2871 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2872 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2873 | __be32 status; |
1da177e4 | 2874 | |
1da177e4 LT |
2875 | /* |
2876 | * Lookup file; if found, lookup stateid and check open request, | |
2877 | * and check for delegations in the process of being recalled. | |
2878 | * If not found, create the nfs4_file struct | |
2879 | */ | |
2880 | fp = find_file(ino); | |
2881 | if (fp) { | |
2882 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2883 | goto out; | |
38c2f4b1 | 2884 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
2885 | if (status) |
2886 | goto out; | |
1da177e4 | 2887 | } else { |
c44c5eeb N |
2888 | status = nfserr_bad_stateid; |
2889 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2890 | goto out; | |
3e772463 | 2891 | status = nfserr_jukebox; |
1da177e4 LT |
2892 | fp = alloc_init_file(ino); |
2893 | if (fp == NULL) | |
2894 | goto out; | |
2895 | } | |
2896 | ||
2897 | /* | |
2898 | * OPEN the file, or upgrade an existing OPEN. | |
2899 | * If truncate fails, the OPEN fails. | |
2900 | */ | |
2901 | if (stp) { | |
2902 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2903 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2904 | if (status) |
2905 | goto out; | |
2906 | } else { | |
f9d7562f | 2907 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2908 | if (status) |
1da177e4 | 2909 | goto out; |
6136d2b4 BF |
2910 | status = init_open_stateid(stp, fp, open); |
2911 | if (status) { | |
2912 | release_open_stateid(stp); | |
2913 | goto out; | |
2914 | } | |
1da177e4 LT |
2915 | status = nfsd4_truncate(rqstp, current_fh, open); |
2916 | if (status) { | |
2283963f | 2917 | release_open_stateid(stp); |
1da177e4 LT |
2918 | goto out; |
2919 | } | |
2920 | } | |
dcef0413 BF |
2921 | update_stateid(&stp->st_stid.sc_stateid); |
2922 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 2923 | |
4dc6ec00 | 2924 | if (nfsd4_has_session(&resp->cstate)) |
dad1c067 | 2925 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 2926 | |
1da177e4 LT |
2927 | /* |
2928 | * Attempt to hand out a delegation. No error return, because the | |
2929 | * OPEN succeeds even if we fail. | |
2930 | */ | |
2931 | nfs4_open_delegation(current_fh, open, stp); | |
2932 | ||
2933 | status = nfs_ok; | |
2934 | ||
8c10cbdb | 2935 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 2936 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 2937 | out: |
13cd2184 N |
2938 | if (fp) |
2939 | put_nfs4_file(fp); | |
37515177 N |
2940 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2941 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2942 | /* |
2943 | * To finish the open response, we just need to set the rflags. | |
2944 | */ | |
2945 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 2946 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 2947 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2948 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2949 | ||
2950 | return status; | |
2951 | } | |
2952 | ||
b37ad28b | 2953 | __be32 |
b591480b BF |
2954 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2955 | clientid_t *clid) | |
1da177e4 LT |
2956 | { |
2957 | struct nfs4_client *clp; | |
b37ad28b | 2958 | __be32 status; |
1da177e4 LT |
2959 | |
2960 | nfs4_lock_state(); | |
2961 | dprintk("process_renew(%08x/%08x): starting\n", | |
2962 | clid->cl_boot, clid->cl_id); | |
2963 | status = nfserr_stale_clientid; | |
2964 | if (STALE_CLIENTID(clid)) | |
2965 | goto out; | |
2966 | clp = find_confirmed_client(clid); | |
2967 | status = nfserr_expired; | |
2968 | if (clp == NULL) { | |
2969 | /* We assume the client took too long to RENEW. */ | |
2970 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2971 | goto out; | |
2972 | } | |
2973 | renew_client(clp); | |
2974 | status = nfserr_cb_path_down; | |
ea1da636 | 2975 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2976 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2977 | goto out; |
2978 | status = nfs_ok; | |
2979 | out: | |
2980 | nfs4_unlock_state(); | |
2981 | return status; | |
2982 | } | |
2983 | ||
c47d832b | 2984 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2985 | }; |
2986 | ||
a76b4319 | 2987 | static void |
af558e33 | 2988 | nfsd4_end_grace(void) |
a76b4319 N |
2989 | { |
2990 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2991 | nfsd4_recdir_purge_old(); |
af558e33 | 2992 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2993 | /* |
2994 | * Now that every NFSv4 client has had the chance to recover and | |
2995 | * to see the (possibly new, possibly shorter) lease time, we | |
2996 | * can safely set the next grace time to the current lease time: | |
2997 | */ | |
2998 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2999 | } |
3000 | ||
fd39ca9a | 3001 | static time_t |
1da177e4 LT |
3002 | nfs4_laundromat(void) |
3003 | { | |
3004 | struct nfs4_client *clp; | |
fe0750e5 | 3005 | struct nfs4_openowner *oo; |
1da177e4 LT |
3006 | struct nfs4_delegation *dp; |
3007 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3008 | time_t cutoff = get_seconds() - nfsd4_lease; |
3009 | time_t t, clientid_val = nfsd4_lease; | |
3010 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3011 | |
3012 | nfs4_lock_state(); | |
3013 | ||
3014 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3015 | if (locks_in_grace()) |
3016 | nfsd4_end_grace(); | |
36acb66b BH |
3017 | INIT_LIST_HEAD(&reaplist); |
3018 | spin_lock(&client_lock); | |
1da177e4 LT |
3019 | list_for_each_safe(pos, next, &client_lru) { |
3020 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3021 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3022 | t = clp->cl_time - cutoff; | |
3023 | if (clientid_val > t) | |
3024 | clientid_val = t; | |
3025 | break; | |
3026 | } | |
d7682988 BH |
3027 | if (atomic_read(&clp->cl_refcount)) { |
3028 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3029 | clp->cl_clientid.cl_id); | |
3030 | continue; | |
3031 | } | |
3032 | unhash_client_locked(clp); | |
3033 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3034 | } |
3035 | spin_unlock(&client_lock); | |
3036 | list_for_each_safe(pos, next, &reaplist) { | |
3037 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3038 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3039 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3040 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3041 | expire_client(clp); |
3042 | } | |
1da177e4 LT |
3043 | spin_lock(&recall_lock); |
3044 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3045 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3046 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3047 | u = dp->dl_time - cutoff; | |
3048 | if (test_val > u) | |
3049 | test_val = u; | |
3050 | break; | |
3051 | } | |
1da177e4 LT |
3052 | list_move(&dp->dl_recall_lru, &reaplist); |
3053 | } | |
3054 | spin_unlock(&recall_lock); | |
3055 | list_for_each_safe(pos, next, &reaplist) { | |
3056 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3057 | list_del_init(&dp->dl_recall_lru); | |
3058 | unhash_delegation(dp); | |
3059 | } | |
cf07d2ea | 3060 | test_val = nfsd4_lease; |
1da177e4 | 3061 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3062 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3063 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3064 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3065 | if (test_val > u) |
3066 | test_val = u; | |
3067 | break; | |
3068 | } | |
fe0750e5 | 3069 | release_openowner(oo); |
1da177e4 LT |
3070 | } |
3071 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3072 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3073 | nfs4_unlock_state(); | |
3074 | return clientid_val; | |
3075 | } | |
3076 | ||
a254b246 HH |
3077 | static struct workqueue_struct *laundry_wq; |
3078 | static void laundromat_main(struct work_struct *); | |
3079 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3080 | ||
3081 | static void | |
c4028958 | 3082 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3083 | { |
3084 | time_t t; | |
3085 | ||
3086 | t = nfs4_laundromat(); | |
3087 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3088 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3089 | } |
3090 | ||
f7a4d872 | 3091 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3092 | { |
f7a4d872 BF |
3093 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3094 | return nfserr_bad_stateid; | |
3095 | return nfs_ok; | |
1da177e4 LT |
3096 | } |
3097 | ||
3098 | static int | |
3099 | STALE_STATEID(stateid_t *stateid) | |
3100 | { | |
d3b313a4 | 3101 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3102 | return 0; |
3103 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3104 | STATEID_VAL(stateid)); |
e4e83ea4 | 3105 | return 1; |
1da177e4 LT |
3106 | } |
3107 | ||
3108 | static inline int | |
3109 | access_permit_read(unsigned long access_bmap) | |
3110 | { | |
3111 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3112 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3113 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3114 | } | |
3115 | ||
3116 | static inline int | |
3117 | access_permit_write(unsigned long access_bmap) | |
3118 | { | |
3119 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3120 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3121 | } | |
3122 | ||
3123 | static | |
dcef0413 | 3124 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3125 | { |
b37ad28b | 3126 | __be32 status = nfserr_openmode; |
1da177e4 | 3127 | |
02921914 BF |
3128 | /* For lock stateid's, we test the parent open, not the lock: */ |
3129 | if (stp->st_openstp) | |
3130 | stp = stp->st_openstp; | |
1da177e4 LT |
3131 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3132 | goto out; | |
3133 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3134 | goto out; | |
3135 | status = nfs_ok; | |
3136 | out: | |
3137 | return status; | |
3138 | } | |
3139 | ||
b37ad28b | 3140 | static inline __be32 |
1da177e4 LT |
3141 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3142 | { | |
203a8c8e | 3143 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3144 | return nfs_ok; |
af558e33 | 3145 | else if (locks_in_grace()) { |
25985edc | 3146 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3147 | * conflicting state; so we must wait out the grace period. */ |
3148 | return nfserr_grace; | |
3149 | } else if (flags & WR_STATE) | |
3150 | return nfs4_share_conflict(current_fh, | |
3151 | NFS4_SHARE_DENY_WRITE); | |
3152 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3153 | return nfs4_share_conflict(current_fh, | |
3154 | NFS4_SHARE_DENY_READ); | |
3155 | } | |
3156 | ||
3157 | /* | |
3158 | * Allow READ/WRITE during grace period on recovered state only for files | |
3159 | * that are not able to provide mandatory locking. | |
3160 | */ | |
3161 | static inline int | |
18f82731 | 3162 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3163 | { |
203a8c8e | 3164 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3165 | } |
3166 | ||
81b82965 BF |
3167 | /* Returns true iff a is later than b: */ |
3168 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3169 | { | |
3170 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3171 | } | |
3172 | ||
28dde241 | 3173 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3174 | { |
6668958f AA |
3175 | /* |
3176 | * When sessions are used the stateid generation number is ignored | |
3177 | * when it is zero. | |
3178 | */ | |
28dde241 | 3179 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3180 | return nfs_ok; |
3181 | ||
3182 | if (in->si_generation == ref->si_generation) | |
3183 | return nfs_ok; | |
6668958f | 3184 | |
0836f587 | 3185 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3186 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3187 | return nfserr_bad_stateid; |
3188 | /* | |
81b82965 BF |
3189 | * However, we could see a stateid from the past, even from a |
3190 | * non-buggy client. For example, if the client sends a lock | |
3191 | * while some IO is outstanding, the lock may bump si_generation | |
3192 | * while the IO is still in flight. The client could avoid that | |
3193 | * situation by waiting for responses on all the IO requests, | |
3194 | * but better performance may result in retrying IO that | |
3195 | * receives an old_stateid error if requests are rarely | |
3196 | * reordered in flight: | |
0836f587 | 3197 | */ |
81b82965 | 3198 | return nfserr_old_stateid; |
0836f587 BF |
3199 | } |
3200 | ||
38c2f4b1 | 3201 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3202 | { |
97b7e3b6 BF |
3203 | struct nfs4_stid *s; |
3204 | struct nfs4_ol_stateid *ols; | |
3205 | __be32 status; | |
17456804 BS |
3206 | |
3207 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3208 | return nfserr_stale_stateid; |
17456804 | 3209 | |
38c2f4b1 | 3210 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3211 | if (!s) |
3212 | return nfserr_stale_stateid; | |
36279ac1 | 3213 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3214 | if (status) |
97b7e3b6 BF |
3215 | return status; |
3216 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3217 | return nfs_ok; | |
3218 | ols = openlockstateid(s); | |
3219 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3220 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3221 | return nfserr_bad_stateid; |
3222 | return nfs_ok; | |
17456804 BS |
3223 | } |
3224 | ||
38c2f4b1 BF |
3225 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3226 | { | |
3227 | struct nfs4_client *cl; | |
3228 | ||
3229 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3230 | return nfserr_bad_stateid; | |
3231 | if (STALE_STATEID(stateid)) | |
3232 | return nfserr_stale_stateid; | |
3233 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3234 | if (!cl) | |
3235 | return nfserr_expired; | |
3236 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3237 | if (!*s) | |
3238 | return nfserr_bad_stateid; | |
3239 | return nfs_ok; | |
3240 | ||
3241 | } | |
3242 | ||
1da177e4 LT |
3243 | /* |
3244 | * Checks for stateid operations | |
3245 | */ | |
b37ad28b | 3246 | __be32 |
dd453dfd BH |
3247 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3248 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3249 | { |
69064a27 | 3250 | struct nfs4_stid *s; |
dcef0413 | 3251 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3252 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3253 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3254 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3255 | __be32 status; |
1da177e4 | 3256 | |
1da177e4 LT |
3257 | if (filpp) |
3258 | *filpp = NULL; | |
3259 | ||
18f82731 | 3260 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3261 | return nfserr_grace; |
3262 | ||
3263 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3264 | return check_special_stateids(current_fh, stateid, flags); | |
3265 | ||
38c2f4b1 BF |
3266 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3267 | if (status) | |
3268 | return status; | |
69064a27 BF |
3269 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3270 | if (status) | |
3271 | goto out; | |
f7a4d872 BF |
3272 | switch (s->sc_type) { |
3273 | case NFS4_DELEG_STID: | |
69064a27 | 3274 | dp = delegstateid(s); |
dc9bf700 BF |
3275 | status = nfs4_check_delegmode(dp, flags); |
3276 | if (status) | |
3277 | goto out; | |
2a74aba7 | 3278 | renew_client(dp->dl_stid.sc_client); |
43b0178e | 3279 | if (filpp) { |
acfdf5c3 | 3280 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3281 | BUG_ON(!*filpp); |
3282 | } | |
f7a4d872 BF |
3283 | break; |
3284 | case NFS4_OPEN_STID: | |
3285 | case NFS4_LOCK_STID: | |
69064a27 | 3286 | stp = openlockstateid(s); |
f7a4d872 BF |
3287 | status = nfs4_check_fh(current_fh, stp); |
3288 | if (status) | |
1da177e4 | 3289 | goto out; |
fe0750e5 | 3290 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3291 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3292 | goto out; |
a4455be0 BF |
3293 | status = nfs4_check_openmode(stp, flags); |
3294 | if (status) | |
1da177e4 LT |
3295 | goto out; |
3296 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3297 | if (filpp) { |
3298 | if (flags & RD_STATE) | |
3299 | *filpp = find_readable_file(stp->st_file); | |
3300 | else | |
3301 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3302 | } |
f7a4d872 BF |
3303 | break; |
3304 | default: | |
3305 | return nfserr_bad_stateid; | |
1da177e4 LT |
3306 | } |
3307 | status = nfs_ok; | |
3308 | out: | |
3309 | return status; | |
3310 | } | |
3311 | ||
e1ca12df | 3312 | static __be32 |
dcef0413 | 3313 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3314 | { |
fe0750e5 | 3315 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3316 | return nfserr_locks_held; |
3317 | release_lock_stateid(stp); | |
3318 | return nfs_ok; | |
3319 | } | |
3320 | ||
17456804 BS |
3321 | /* |
3322 | * Test if the stateid is valid | |
3323 | */ | |
3324 | __be32 | |
3325 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3326 | struct nfsd4_test_stateid *test_stateid) | |
3327 | { | |
36279ac1 | 3328 | /* real work is done during encoding */ |
17456804 BS |
3329 | return nfs_ok; |
3330 | } | |
3331 | ||
e1ca12df BS |
3332 | __be32 |
3333 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3334 | struct nfsd4_free_stateid *free_stateid) | |
3335 | { | |
3336 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3337 | struct nfs4_stid *s; |
38c2f4b1 | 3338 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3339 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3340 | |
3341 | nfs4_lock_state(); | |
38c2f4b1 | 3342 | s = find_stateid(cl, stateid); |
2da1cec7 | 3343 | if (!s) |
81b82965 | 3344 | goto out; |
2da1cec7 BF |
3345 | switch (s->sc_type) { |
3346 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3347 | ret = nfserr_locks_held; |
3348 | goto out; | |
2da1cec7 BF |
3349 | case NFS4_OPEN_STID: |
3350 | case NFS4_LOCK_STID: | |
3351 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3352 | if (ret) | |
3353 | goto out; | |
3354 | if (s->sc_type == NFS4_LOCK_STID) | |
3355 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3356 | else | |
3357 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3358 | break; |
3359 | default: | |
3360 | ret = nfserr_bad_stateid; | |
e1ca12df | 3361 | } |
e1ca12df BS |
3362 | out: |
3363 | nfs4_unlock_state(); | |
3364 | return ret; | |
3365 | } | |
3366 | ||
4c4cd222 N |
3367 | static inline int |
3368 | setlkflg (int type) | |
3369 | { | |
3370 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3371 | RD_STATE : WR_STATE; | |
3372 | } | |
1da177e4 | 3373 | |
dcef0413 | 3374 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3375 | { |
3376 | struct svc_fh *current_fh = &cstate->current_fh; | |
3377 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3378 | __be32 status; | |
3379 | ||
c0a5d93e BF |
3380 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3381 | if (status) | |
3382 | return status; | |
f7a4d872 BF |
3383 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3384 | /* | |
3385 | * "Closed" stateid's exist *only* to return | |
3386 | * nfserr_replay_me from the previous step. | |
3387 | */ | |
3388 | return nfserr_bad_stateid; | |
3389 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3390 | if (status) | |
3391 | return status; | |
3392 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3393 | } |
3394 | ||
1da177e4 LT |
3395 | /* |
3396 | * Checks for sequence id mutating operations. | |
3397 | */ | |
b37ad28b | 3398 | static __be32 |
dd453dfd | 3399 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3400 | stateid_t *stateid, char typemask, |
dcef0413 | 3401 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3402 | { |
0836f587 | 3403 | __be32 status; |
38c2f4b1 | 3404 | struct nfs4_stid *s; |
1da177e4 | 3405 | |
8c10cbdb BH |
3406 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3407 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3408 | |
1da177e4 | 3409 | *stpp = NULL; |
38c2f4b1 | 3410 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3411 | if (status) |
3412 | return status; | |
38c2f4b1 | 3413 | *stpp = openlockstateid(s); |
c0a5d93e BF |
3414 | cstate->replay_owner = (*stpp)->st_stateowner; |
3415 | renew_client((*stpp)->st_stateowner->so_client); | |
1da177e4 | 3416 | |
c0a5d93e BF |
3417 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3418 | } | |
39325bd0 | 3419 | |
dcef0413 | 3420 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3421 | { |
3422 | __be32 status; | |
3423 | struct nfs4_openowner *oo; | |
1da177e4 | 3424 | |
c0a5d93e | 3425 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3426 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3427 | if (status) |
3428 | return status; | |
c0a5d93e | 3429 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3430 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3431 | return nfserr_bad_stateid; |
3a4f98bb | 3432 | return nfs_ok; |
1da177e4 LT |
3433 | } |
3434 | ||
b37ad28b | 3435 | __be32 |
ca364317 | 3436 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3437 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3438 | { |
b37ad28b | 3439 | __be32 status; |
fe0750e5 | 3440 | struct nfs4_openowner *oo; |
dcef0413 | 3441 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3442 | |
3443 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3444 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3445 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3446 | |
ca364317 | 3447 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3448 | if (status) |
3449 | return status; | |
1da177e4 LT |
3450 | |
3451 | nfs4_lock_state(); | |
3452 | ||
9072d5c6 | 3453 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3454 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3455 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3456 | if (status) |
68b66e82 | 3457 | goto out; |
fe0750e5 | 3458 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3459 | status = nfserr_bad_stateid; |
dad1c067 | 3460 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3461 | goto out; |
dad1c067 | 3462 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3463 | update_stateid(&stp->st_stid.sc_stateid); |
3464 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3465 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3466 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3467 | |
fe0750e5 | 3468 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3469 | status = nfs_ok; |
1da177e4 | 3470 | out: |
5ec094c1 BF |
3471 | if (!cstate->replay_owner) |
3472 | nfs4_unlock_state(); | |
1da177e4 LT |
3473 | return status; |
3474 | } | |
3475 | ||
6409a5a6 | 3476 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3477 | { |
6409a5a6 BF |
3478 | if (!test_bit(access, &stp->st_access_bmap)) |
3479 | return; | |
3480 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
3481 | __clear_bit(access, &stp->st_access_bmap); | |
3482 | } | |
f197c271 | 3483 | |
6409a5a6 BF |
3484 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3485 | { | |
3486 | switch (to_access) { | |
3487 | case NFS4_SHARE_ACCESS_READ: | |
3488 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3489 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3490 | break; | |
3491 | case NFS4_SHARE_ACCESS_WRITE: | |
3492 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3493 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3494 | break; | |
3495 | case NFS4_SHARE_ACCESS_BOTH: | |
3496 | break; | |
3497 | default: | |
3498 | BUG(); | |
1da177e4 LT |
3499 | } |
3500 | } | |
3501 | ||
3502 | static void | |
3503 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3504 | { | |
3505 | int i; | |
3506 | for (i = 0; i < 4; i++) { | |
3507 | if ((i & deny) != i) | |
3508 | __clear_bit(i, bmap); | |
3509 | } | |
3510 | } | |
3511 | ||
b37ad28b | 3512 | __be32 |
ca364317 BF |
3513 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3514 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3515 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3516 | { |
b37ad28b | 3517 | __be32 status; |
dcef0413 | 3518 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3519 | |
3520 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3521 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3522 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3523 | |
c30e92df BF |
3524 | /* We don't yet support WANT bits: */ |
3525 | od->od_share_access &= NFS4_SHARE_ACCESS_MASK; | |
1da177e4 LT |
3526 | |
3527 | nfs4_lock_state(); | |
c0a5d93e BF |
3528 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3529 | &od->od_stateid, &stp); | |
9072d5c6 | 3530 | if (status) |
1da177e4 | 3531 | goto out; |
1da177e4 LT |
3532 | status = nfserr_inval; |
3533 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3534 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3535 | stp->st_access_bmap, od->od_share_access); | |
3536 | goto out; | |
3537 | } | |
3538 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3539 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3540 | stp->st_deny_bmap, od->od_share_deny); | |
3541 | goto out; | |
3542 | } | |
6409a5a6 | 3543 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3544 | |
1da177e4 LT |
3545 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3546 | ||
dcef0413 BF |
3547 | update_stateid(&stp->st_stid.sc_stateid); |
3548 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3549 | status = nfs_ok; |
3550 | out: | |
5ec094c1 BF |
3551 | if (!cstate->replay_owner) |
3552 | nfs4_unlock_state(); | |
1da177e4 LT |
3553 | return status; |
3554 | } | |
3555 | ||
38c387b5 BF |
3556 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3557 | { | |
3558 | struct nfs4_openowner *oo; | |
3559 | struct nfs4_ol_stateid *s; | |
3560 | ||
3561 | if (!so->so_is_open_owner) | |
3562 | return; | |
3563 | oo = openowner(so); | |
3564 | s = oo->oo_last_closed_stid; | |
3565 | if (!s) | |
3566 | return; | |
3567 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3568 | /* Release the last_closed_stid on the next seqid bump: */ | |
3569 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3570 | return; | |
3571 | } | |
3572 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3573 | release_last_closed_stateid(oo); |
3574 | } | |
3575 | ||
3576 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3577 | { | |
3578 | unhash_open_stateid(s); | |
3579 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3580 | } |
3581 | ||
1da177e4 LT |
3582 | /* |
3583 | * nfs4_unlock_state() called after encode | |
3584 | */ | |
b37ad28b | 3585 | __be32 |
ca364317 | 3586 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3587 | struct nfsd4_close *close) |
1da177e4 | 3588 | { |
b37ad28b | 3589 | __be32 status; |
fe0750e5 | 3590 | struct nfs4_openowner *oo; |
dcef0413 | 3591 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3592 | |
3593 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3594 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3595 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3596 | |
3597 | nfs4_lock_state(); | |
f7a4d872 BF |
3598 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3599 | &close->cl_stateid, | |
3600 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3601 | &stp); | |
9072d5c6 | 3602 | if (status) |
1da177e4 | 3603 | goto out; |
fe0750e5 | 3604 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3605 | status = nfs_ok; |
dcef0413 BF |
3606 | update_stateid(&stp->st_stid.sc_stateid); |
3607 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3608 | |
f7a4d872 | 3609 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3610 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3611 | |
3612 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3613 | * released by the laundromat service after the lease period | |
3614 | * to enable us to handle CLOSE replay | |
3615 | */ | |
fe0750e5 BF |
3616 | if (list_empty(&oo->oo_owner.so_stateids)) |
3617 | move_to_close_lru(oo); | |
1da177e4 | 3618 | out: |
5ec094c1 BF |
3619 | if (!cstate->replay_owner) |
3620 | nfs4_unlock_state(); | |
1da177e4 LT |
3621 | return status; |
3622 | } | |
3623 | ||
b37ad28b | 3624 | __be32 |
ca364317 BF |
3625 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3626 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3627 | { |
203a8c8e BF |
3628 | struct nfs4_delegation *dp; |
3629 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3630 | struct nfs4_stid *s; |
203a8c8e | 3631 | struct inode *inode; |
b37ad28b | 3632 | __be32 status; |
1da177e4 | 3633 | |
ca364317 | 3634 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3635 | return status; |
3636 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3637 | |
3638 | nfs4_lock_state(); | |
38c2f4b1 BF |
3639 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3640 | if (status) | |
203a8c8e | 3641 | goto out; |
38c2f4b1 | 3642 | dp = delegstateid(s); |
d5477a8d | 3643 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3644 | if (status) |
3645 | goto out; | |
2a74aba7 | 3646 | renew_client(dp->dl_stid.sc_client); |
203a8c8e BF |
3647 | |
3648 | unhash_delegation(dp); | |
1da177e4 | 3649 | out: |
203a8c8e BF |
3650 | nfs4_unlock_state(); |
3651 | ||
1da177e4 LT |
3652 | return status; |
3653 | } | |
3654 | ||
3655 | ||
3656 | /* | |
3657 | * Lock owner state (byte-range locks) | |
3658 | */ | |
3659 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3660 | #define LOCK_HASH_BITS 8 | |
3661 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3662 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3663 | ||
87df4de8 BH |
3664 | static inline u64 |
3665 | end_offset(u64 start, u64 len) | |
3666 | { | |
3667 | u64 end; | |
3668 | ||
3669 | end = start + len; | |
3670 | return end >= start ? end: NFS4_MAX_UINT64; | |
3671 | } | |
3672 | ||
3673 | /* last octet in a range */ | |
3674 | static inline u64 | |
3675 | last_byte_offset(u64 start, u64 len) | |
3676 | { | |
3677 | u64 end; | |
3678 | ||
3679 | BUG_ON(!len); | |
3680 | end = start + len; | |
3681 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3682 | } | |
3683 | ||
1da177e4 LT |
3684 | static inline unsigned int |
3685 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3686 | struct xdr_netobj *ownername) | |
3687 | { | |
3688 | return (file_hashval(inode) + cl_id | |
3689 | + opaque_hashval(ownername->data, ownername->len)) | |
3690 | & LOCK_HASH_MASK; | |
3691 | } | |
3692 | ||
1da177e4 | 3693 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
1da177e4 | 3694 | |
1da177e4 LT |
3695 | /* |
3696 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3697 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3698 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3699 | * locking, this prevents us from being completely protocol-compliant. The | |
3700 | * real solution to this problem is to start using unsigned file offsets in | |
3701 | * the VFS, but this is a very deep change! | |
3702 | */ | |
3703 | static inline void | |
3704 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3705 | { | |
3706 | if (lock->fl_start < 0) | |
3707 | lock->fl_start = OFFSET_MAX; | |
3708 | if (lock->fl_end < 0) | |
3709 | lock->fl_end = OFFSET_MAX; | |
3710 | } | |
3711 | ||
d5b9026a N |
3712 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3713 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3714 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3715 | }; |
1da177e4 LT |
3716 | |
3717 | static inline void | |
3718 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3719 | { | |
fe0750e5 | 3720 | struct nfs4_lockowner *lo; |
1da177e4 | 3721 | |
d5b9026a | 3722 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3723 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3724 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3725 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3726 | if (!deny->ld_owner.data) |
3727 | /* We just don't care that much */ | |
3728 | goto nevermind; | |
fe0750e5 BF |
3729 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3730 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3731 | } else { |
7c13f344 BF |
3732 | nevermind: |
3733 | deny->ld_owner.len = 0; | |
3734 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3735 | deny->ld_clientid.cl_boot = 0; |
3736 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3737 | } |
3738 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3739 | deny->ld_length = NFS4_MAX_UINT64; |
3740 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3741 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3742 | deny->ld_type = NFS4_READ_LT; | |
3743 | if (fl->fl_type != F_RDLCK) | |
3744 | deny->ld_type = NFS4_WRITE_LT; | |
3745 | } | |
3746 | ||
fe0750e5 BF |
3747 | static struct nfs4_lockowner * |
3748 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3749 | struct xdr_netobj *owner) |
3750 | { | |
3751 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3752 | struct nfs4_stateowner *op; | |
3753 | ||
3754 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3755 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3756 | return lockowner(op); |
1da177e4 LT |
3757 | } |
3758 | return NULL; | |
3759 | } | |
3760 | ||
dcef0413 | 3761 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3762 | { |
fe0750e5 BF |
3763 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
3764 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3765 | } |
3766 | ||
1da177e4 LT |
3767 | /* |
3768 | * Alloc a lock owner structure. | |
3769 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3770 | * occurred. |
1da177e4 LT |
3771 | * |
3772 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3773 | */ |
3774 | ||
fe0750e5 | 3775 | static struct nfs4_lockowner * |
dcef0413 | 3776 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3777 | struct nfs4_lockowner *lo; |
1da177e4 | 3778 | |
fe0750e5 BF |
3779 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3780 | if (!lo) | |
1da177e4 | 3781 | return NULL; |
fe0750e5 BF |
3782 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3783 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3784 | /* It is the openowner seqid that will be incremented in encode in the |
3785 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3786 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3787 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3788 | return lo; | |
1da177e4 LT |
3789 | } |
3790 | ||
dcef0413 BF |
3791 | static struct nfs4_ol_stateid * |
3792 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3793 | { |
dcef0413 | 3794 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3795 | struct nfs4_client *clp = lo->lo_owner.so_client; |
6136d2b4 | 3796 | __be32 status; |
1da177e4 | 3797 | |
5ac049ac N |
3798 | stp = nfs4_alloc_stateid(); |
3799 | if (stp == NULL) | |
6136d2b4 BF |
3800 | return NULL; |
3801 | status = init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); | |
3802 | if (status) { | |
3803 | free_generic_stateid(stp); | |
3804 | return NULL; | |
3805 | } | |
8beefa24 | 3806 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3807 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3808 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3809 | get_nfs4_file(fp); |
1da177e4 | 3810 | stp->st_file = fp; |
0997b173 | 3811 | stp->st_access_bmap = 0; |
1da177e4 | 3812 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3813 | stp->st_openstp = open_stp; |
1da177e4 LT |
3814 | return stp; |
3815 | } | |
3816 | ||
fd39ca9a | 3817 | static int |
1da177e4 LT |
3818 | check_lock_length(u64 offset, u64 length) |
3819 | { | |
87df4de8 | 3820 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3821 | LOFF_OVERFLOW(offset, length))); |
3822 | } | |
3823 | ||
dcef0413 | 3824 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3825 | { |
3826 | struct nfs4_file *fp = lock_stp->st_file; | |
3827 | int oflag = nfs4_access_to_omode(access); | |
3828 | ||
3829 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3830 | return; | |
3831 | nfs4_file_get_access(fp, oflag); | |
3832 | __set_bit(access, &lock_stp->st_access_bmap); | |
3833 | } | |
3834 | ||
1da177e4 LT |
3835 | /* |
3836 | * LOCK operation | |
3837 | */ | |
b37ad28b | 3838 | __be32 |
ca364317 | 3839 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3840 | struct nfsd4_lock *lock) |
1da177e4 | 3841 | { |
fe0750e5 BF |
3842 | struct nfs4_openowner *open_sop = NULL; |
3843 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 3844 | struct nfs4_ol_stateid *lock_stp; |
7d947842 BF |
3845 | struct nfs4_file *fp; |
3846 | struct file *filp = NULL; | |
1da177e4 | 3847 | struct file_lock file_lock; |
8dc7c311 | 3848 | struct file_lock conflock; |
b37ad28b | 3849 | __be32 status = 0; |
1da177e4 | 3850 | unsigned int strhashval; |
b34f27aa | 3851 | int lkflg; |
b8dd7b9a | 3852 | int err; |
1da177e4 LT |
3853 | |
3854 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3855 | (long long) lock->lk_offset, | |
3856 | (long long) lock->lk_length); | |
3857 | ||
1da177e4 LT |
3858 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3859 | return nfserr_inval; | |
3860 | ||
ca364317 | 3861 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3862 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3863 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3864 | return status; | |
3865 | } | |
3866 | ||
1da177e4 LT |
3867 | nfs4_lock_state(); |
3868 | ||
3869 | if (lock->lk_is_new) { | |
893f8770 N |
3870 | /* |
3871 | * Client indicates that this is a new lockowner. | |
3872 | * Use open owner and open stateid to create lock owner and | |
3873 | * lock stateid. | |
3874 | */ | |
dcef0413 | 3875 | struct nfs4_ol_stateid *open_stp = NULL; |
1da177e4 LT |
3876 | |
3877 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3878 | if (!nfsd4_has_session(cstate) && |
3879 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3880 | goto out; |
1da177e4 | 3881 | |
1da177e4 | 3882 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 3883 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
3884 | lock->lk_new_open_seqid, |
3885 | &lock->lk_new_open_stateid, | |
c0a5d93e | 3886 | &open_stp); |
37515177 | 3887 | if (status) |
1da177e4 | 3888 | goto out; |
fe0750e5 | 3889 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3890 | status = nfserr_bad_stateid; |
b34f27aa | 3891 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3892 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3893 | &lock->v.new.clientid)) |
3894 | goto out; | |
1da177e4 LT |
3895 | /* create lockowner and lock stateid */ |
3896 | fp = open_stp->st_file; | |
fe0750e5 BF |
3897 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3898 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3899 | &lock->v.new.owner); |
3e9e3dbe N |
3900 | /* XXX: Do we need to check for duplicate stateowners on |
3901 | * the same file, or should they just be allowed (and | |
3902 | * create new stateids)? */ | |
3e772463 | 3903 | status = nfserr_jukebox; |
b59e3c0e | 3904 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3905 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3906 | if (lock_sop == NULL) |
1da177e4 | 3907 | goto out; |
b59e3c0e | 3908 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3909 | if (lock_stp == NULL) |
1da177e4 | 3910 | goto out; |
1da177e4 LT |
3911 | } else { |
3912 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3913 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3914 | lock->lk_old_lock_seqid, |
3915 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 3916 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
3917 | if (status) |
3918 | goto out; | |
fe0750e5 | 3919 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3920 | fp = lock_stp->st_file; |
1da177e4 | 3921 | } |
9072d5c6 | 3922 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3923 | |
b34f27aa BF |
3924 | lkflg = setlkflg(lock->lk_type); |
3925 | status = nfs4_check_openmode(lock_stp, lkflg); | |
3926 | if (status) | |
3927 | goto out; | |
3928 | ||
0dd395dc | 3929 | status = nfserr_grace; |
af558e33 | 3930 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3931 | goto out; |
3932 | status = nfserr_no_grace; | |
af558e33 | 3933 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3934 | goto out; |
3935 | ||
1da177e4 LT |
3936 | locks_init_lock(&file_lock); |
3937 | switch (lock->lk_type) { | |
3938 | case NFS4_READ_LT: | |
3939 | case NFS4_READW_LT: | |
0997b173 BF |
3940 | filp = find_readable_file(lock_stp->st_file); |
3941 | if (filp) | |
3942 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 3943 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 3944 | break; |
1da177e4 LT |
3945 | case NFS4_WRITE_LT: |
3946 | case NFS4_WRITEW_LT: | |
0997b173 BF |
3947 | filp = find_writeable_file(lock_stp->st_file); |
3948 | if (filp) | |
3949 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 3950 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 3951 | break; |
1da177e4 LT |
3952 | default: |
3953 | status = nfserr_inval; | |
3954 | goto out; | |
3955 | } | |
f9d7562f BF |
3956 | if (!filp) { |
3957 | status = nfserr_openmode; | |
3958 | goto out; | |
3959 | } | |
b59e3c0e | 3960 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3961 | file_lock.fl_pid = current->tgid; |
3962 | file_lock.fl_file = filp; | |
3963 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3964 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3965 | |
3966 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3967 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3968 | nfs4_transform_lock_offset(&file_lock); |
3969 | ||
3970 | /* | |
3971 | * Try to lock the file in the VFS. | |
3972 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3973 | */ | |
3974 | ||
529d7b2a | 3975 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 3976 | switch (-err) { |
1da177e4 | 3977 | case 0: /* success! */ |
dcef0413 BF |
3978 | update_stateid(&lock_stp->st_stid.sc_stateid); |
3979 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 3980 | sizeof(stateid_t)); |
b8dd7b9a | 3981 | status = 0; |
eb76b3fd AA |
3982 | break; |
3983 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3984 | status = nfserr_denied; | |
3985 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3986 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3987 | break; | |
1da177e4 LT |
3988 | case (EDEADLK): |
3989 | status = nfserr_deadlock; | |
eb76b3fd | 3990 | break; |
3e772463 | 3991 | default: |
fd85b817 | 3992 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 3993 | status = nfserrno(err); |
eb76b3fd | 3994 | break; |
1da177e4 | 3995 | } |
1da177e4 | 3996 | out: |
8a280510 | 3997 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3998 | release_lockowner(lock_sop); |
5ec094c1 BF |
3999 | if (!cstate->replay_owner) |
4000 | nfs4_unlock_state(); | |
1da177e4 LT |
4001 | return status; |
4002 | } | |
4003 | ||
55ef1274 BF |
4004 | /* |
4005 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4006 | * so we do a temporary open here just to get an open file to pass to | |
4007 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4008 | * inode operation.) | |
4009 | */ | |
4010 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4011 | { | |
4012 | struct file *file; | |
4013 | int err; | |
4014 | ||
4015 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4016 | if (err) | |
4017 | return err; | |
4018 | err = vfs_test_lock(file, lock); | |
4019 | nfsd_close(file); | |
4020 | return err; | |
4021 | } | |
4022 | ||
1da177e4 LT |
4023 | /* |
4024 | * LOCKT operation | |
4025 | */ | |
b37ad28b | 4026 | __be32 |
ca364317 BF |
4027 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4028 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4029 | { |
4030 | struct inode *inode; | |
1da177e4 | 4031 | struct file_lock file_lock; |
fe0750e5 | 4032 | struct nfs4_lockowner *lo; |
fd85b817 | 4033 | int error; |
b37ad28b | 4034 | __be32 status; |
1da177e4 | 4035 | |
af558e33 | 4036 | if (locks_in_grace()) |
1da177e4 LT |
4037 | return nfserr_grace; |
4038 | ||
4039 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4040 | return nfserr_inval; | |
4041 | ||
1da177e4 LT |
4042 | nfs4_lock_state(); |
4043 | ||
4044 | status = nfserr_stale_clientid; | |
60adfc50 | 4045 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4046 | goto out; |
1da177e4 | 4047 | |
75c096f7 | 4048 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4049 | goto out; |
1da177e4 | 4050 | |
ca364317 | 4051 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4052 | locks_init_lock(&file_lock); |
4053 | switch (lockt->lt_type) { | |
4054 | case NFS4_READ_LT: | |
4055 | case NFS4_READW_LT: | |
4056 | file_lock.fl_type = F_RDLCK; | |
4057 | break; | |
4058 | case NFS4_WRITE_LT: | |
4059 | case NFS4_WRITEW_LT: | |
4060 | file_lock.fl_type = F_WRLCK; | |
4061 | break; | |
4062 | default: | |
2fdada03 | 4063 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4064 | status = nfserr_inval; |
4065 | goto out; | |
4066 | } | |
4067 | ||
fe0750e5 BF |
4068 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4069 | if (lo) | |
4070 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4071 | file_lock.fl_pid = current->tgid; |
4072 | file_lock.fl_flags = FL_POSIX; | |
4073 | ||
4074 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4075 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4076 | |
4077 | nfs4_transform_lock_offset(&file_lock); | |
4078 | ||
1da177e4 | 4079 | status = nfs_ok; |
55ef1274 | 4080 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4081 | if (error) { |
4082 | status = nfserrno(error); | |
4083 | goto out; | |
4084 | } | |
9d6a8c5c | 4085 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4086 | status = nfserr_denied; |
9d6a8c5c | 4087 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4088 | } |
4089 | out: | |
4090 | nfs4_unlock_state(); | |
4091 | return status; | |
4092 | } | |
4093 | ||
b37ad28b | 4094 | __be32 |
ca364317 | 4095 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4096 | struct nfsd4_locku *locku) |
1da177e4 | 4097 | { |
dcef0413 | 4098 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4099 | struct file *filp = NULL; |
4100 | struct file_lock file_lock; | |
b37ad28b | 4101 | __be32 status; |
b8dd7b9a | 4102 | int err; |
1da177e4 LT |
4103 | |
4104 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4105 | (long long) locku->lu_offset, | |
4106 | (long long) locku->lu_length); | |
4107 | ||
4108 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4109 | return nfserr_inval; | |
4110 | ||
4111 | nfs4_lock_state(); | |
4112 | ||
9072d5c6 | 4113 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4114 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4115 | if (status) |
1da177e4 | 4116 | goto out; |
f9d7562f BF |
4117 | filp = find_any_file(stp->st_file); |
4118 | if (!filp) { | |
4119 | status = nfserr_lock_range; | |
4120 | goto out; | |
4121 | } | |
1da177e4 LT |
4122 | BUG_ON(!filp); |
4123 | locks_init_lock(&file_lock); | |
4124 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4125 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4126 | file_lock.fl_pid = current->tgid; |
4127 | file_lock.fl_file = filp; | |
4128 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4129 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4130 | file_lock.fl_start = locku->lu_offset; |
4131 | ||
87df4de8 | 4132 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4133 | nfs4_transform_lock_offset(&file_lock); |
4134 | ||
4135 | /* | |
4136 | * Try to unlock the file in the VFS. | |
4137 | */ | |
fd85b817 | 4138 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4139 | if (err) { |
fd85b817 | 4140 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4141 | goto out_nfserr; |
4142 | } | |
4143 | /* | |
4144 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4145 | */ | |
dcef0413 BF |
4146 | update_stateid(&stp->st_stid.sc_stateid); |
4147 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4148 | |
4149 | out: | |
71c3bcd7 BF |
4150 | if (!cstate->replay_owner) |
4151 | nfs4_unlock_state(); | |
1da177e4 LT |
4152 | return status; |
4153 | ||
4154 | out_nfserr: | |
b8dd7b9a | 4155 | status = nfserrno(err); |
1da177e4 LT |
4156 | goto out; |
4157 | } | |
4158 | ||
4159 | /* | |
4160 | * returns | |
4161 | * 1: locks held by lockowner | |
4162 | * 0: no locks held by lockowner | |
4163 | */ | |
4164 | static int | |
fe0750e5 | 4165 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4166 | { |
4167 | struct file_lock **flpp; | |
f9d7562f | 4168 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4169 | int status = 0; |
4170 | ||
b89f4321 | 4171 | lock_flocks(); |
1da177e4 | 4172 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4173 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4174 | status = 1; |
4175 | goto out; | |
796dadfd | 4176 | } |
1da177e4 LT |
4177 | } |
4178 | out: | |
b89f4321 | 4179 | unlock_flocks(); |
1da177e4 LT |
4180 | return status; |
4181 | } | |
4182 | ||
b37ad28b | 4183 | __be32 |
b591480b BF |
4184 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4185 | struct nfsd4_compound_state *cstate, | |
4186 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4187 | { |
4188 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4189 | struct nfs4_stateowner *sop; |
fe0750e5 | 4190 | struct nfs4_lockowner *lo; |
dcef0413 | 4191 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4192 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4193 | struct list_head matches; |
4194 | int i; | |
b37ad28b | 4195 | __be32 status; |
1da177e4 LT |
4196 | |
4197 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4198 | clid->cl_boot, clid->cl_id); | |
4199 | ||
4200 | /* XXX check for lease expiration */ | |
4201 | ||
4202 | status = nfserr_stale_clientid; | |
849823c5 | 4203 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4204 | return status; |
1da177e4 LT |
4205 | |
4206 | nfs4_lock_state(); | |
4207 | ||
3e9e3dbe N |
4208 | status = nfserr_locks_held; |
4209 | /* XXX: we're doing a linear search through all the lockowners. | |
4210 | * Yipes! For now we'll just hope clients aren't really using | |
4211 | * release_lockowner much, but eventually we have to fix these | |
4212 | * data structures. */ | |
4213 | INIT_LIST_HEAD(&matches); | |
4214 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
d3b313a4 | 4215 | list_for_each_entry(sop, &lock_ownerstr_hashtbl[i], so_strhash) { |
599e0a22 | 4216 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4217 | continue; |
4218 | list_for_each_entry(stp, &sop->so_stateids, | |
4219 | st_perstateowner) { | |
fe0750e5 BF |
4220 | lo = lockowner(sop); |
4221 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4222 | goto out; |
fe0750e5 | 4223 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4224 | } |
1da177e4 | 4225 | } |
3e9e3dbe N |
4226 | } |
4227 | /* Clients probably won't expect us to return with some (but not all) | |
4228 | * of the lockowner state released; so don't release any until all | |
4229 | * have been checked. */ | |
4230 | status = nfs_ok; | |
0fa822e4 | 4231 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4232 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4233 | lo_list); | |
0fa822e4 N |
4234 | /* unhash_stateowner deletes so_perclient only |
4235 | * for openowners. */ | |
fe0750e5 BF |
4236 | list_del(&lo->lo_list); |
4237 | release_lockowner(lo); | |
1da177e4 LT |
4238 | } |
4239 | out: | |
4240 | nfs4_unlock_state(); | |
4241 | return status; | |
4242 | } | |
4243 | ||
4244 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4245 | alloc_reclaim(void) |
1da177e4 | 4246 | { |
a55370a3 | 4247 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4248 | } |
4249 | ||
c7b9a459 | 4250 | int |
a1bcecd2 | 4251 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4252 | { |
4253 | unsigned int strhashval = clientstr_hashval(name); | |
4254 | struct nfs4_client *clp; | |
4255 | ||
e203d506 | 4256 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4257 | return clp ? 1 : 0; |
4258 | } | |
4259 | ||
1da177e4 LT |
4260 | /* |
4261 | * failure => all reset bets are off, nfserr_no_grace... | |
4262 | */ | |
190e4fbf N |
4263 | int |
4264 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4265 | { |
4266 | unsigned int strhashval; | |
4267 | struct nfs4_client_reclaim *crp = NULL; | |
4268 | ||
a55370a3 N |
4269 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4270 | crp = alloc_reclaim(); | |
1da177e4 LT |
4271 | if (!crp) |
4272 | return 0; | |
a55370a3 | 4273 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4274 | INIT_LIST_HEAD(&crp->cr_strhash); |
4275 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4276 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4277 | reclaim_str_hashtbl_size++; |
4278 | return 1; | |
4279 | } | |
4280 | ||
4281 | static void | |
4282 | nfs4_release_reclaim(void) | |
4283 | { | |
4284 | struct nfs4_client_reclaim *crp = NULL; | |
4285 | int i; | |
4286 | ||
1da177e4 LT |
4287 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4288 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4289 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4290 | struct nfs4_client_reclaim, cr_strhash); | |
4291 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4292 | kfree(crp); |
4293 | reclaim_str_hashtbl_size--; | |
4294 | } | |
4295 | } | |
4296 | BUG_ON(reclaim_str_hashtbl_size); | |
4297 | } | |
4298 | ||
4299 | /* | |
4300 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4301 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4302 | nfs4_find_reclaim_client(clientid_t *clid) |
4303 | { | |
4304 | unsigned int strhashval; | |
4305 | struct nfs4_client *clp; | |
4306 | struct nfs4_client_reclaim *crp = NULL; | |
4307 | ||
4308 | ||
4309 | /* find clientid in conf_id_hashtbl */ | |
4310 | clp = find_confirmed_client(clid); | |
4311 | if (clp == NULL) | |
4312 | return NULL; | |
4313 | ||
a55370a3 N |
4314 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4315 | clp->cl_name.len, clp->cl_name.data, | |
4316 | clp->cl_recdir); | |
1da177e4 LT |
4317 | |
4318 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4319 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4320 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4321 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4322 | return crp; |
4323 | } | |
4324 | } | |
4325 | return NULL; | |
4326 | } | |
4327 | ||
4328 | /* | |
4329 | * Called from OPEN. Look for clientid in reclaim list. | |
4330 | */ | |
b37ad28b | 4331 | __be32 |
1da177e4 LT |
4332 | nfs4_check_open_reclaim(clientid_t *clid) |
4333 | { | |
dfc83565 | 4334 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4335 | } |
4336 | ||
ac4d8ff2 | 4337 | /* initialization to perform at module load time: */ |
1da177e4 | 4338 | |
e8ff2a84 | 4339 | int |
ac4d8ff2 | 4340 | nfs4_state_init(void) |
1da177e4 | 4341 | { |
e8ff2a84 | 4342 | int i, status; |
1da177e4 | 4343 | |
e8ff2a84 BF |
4344 | status = nfsd4_init_slabs(); |
4345 | if (status) | |
4346 | return status; | |
1da177e4 LT |
4347 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4348 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4349 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4350 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4351 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4352 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4353 | } |
5282fd72 ME |
4354 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4355 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4356 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4357 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4358 | } | |
506f275f BF |
4359 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4360 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
1da177e4 | 4361 | } |
1da177e4 | 4362 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
1da177e4 LT |
4363 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
4364 | } | |
1da177e4 | 4365 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4366 | INIT_LIST_HEAD(&close_lru); |
4367 | INIT_LIST_HEAD(&client_lru); | |
4368 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4369 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4370 | return 0; |
ac4d8ff2 N |
4371 | } |
4372 | ||
190e4fbf N |
4373 | static void |
4374 | nfsd4_load_reboot_recovery_data(void) | |
4375 | { | |
4376 | int status; | |
4377 | ||
0964a3d3 | 4378 | nfs4_lock_state(); |
48483bf2 | 4379 | nfsd4_init_recdir(); |
190e4fbf | 4380 | status = nfsd4_recdir_load(); |
0964a3d3 | 4381 | nfs4_unlock_state(); |
190e4fbf N |
4382 | if (status) |
4383 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4384 | } | |
4385 | ||
c2f1a551 MS |
4386 | /* |
4387 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4388 | * client may quite reasonably hang on to a delegation as long as it has | |
4389 | * the inode cached. This becomes an obvious problem the first time a | |
4390 | * client's inode cache approaches the size of the server's total memory. | |
4391 | * | |
4392 | * For now we avoid this problem by imposing a hard limit on the number | |
4393 | * of delegations, which varies according to the server's memory size. | |
4394 | */ | |
4395 | static void | |
4396 | set_max_delegations(void) | |
4397 | { | |
4398 | /* | |
4399 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4400 | * estimates suggest that in the worst case (where every delegation | |
4401 | * is for a different inode), a delegation could take about 1.5K, | |
4402 | * giving a worst case usage of about 6% of memory. | |
4403 | */ | |
4404 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4405 | } | |
4406 | ||
ac4d8ff2 N |
4407 | /* initialization to perform when the nfsd service is started: */ |
4408 | ||
29ab23cc | 4409 | static int |
ac4d8ff2 N |
4410 | __nfs4_state_start(void) |
4411 | { | |
b5a1a81e BF |
4412 | int ret; |
4413 | ||
1da177e4 | 4414 | boot_time = get_seconds(); |
af558e33 | 4415 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4416 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4417 | nfsd4_grace); |
b5a1a81e BF |
4418 | ret = set_callback_cred(); |
4419 | if (ret) | |
4420 | return -ENOMEM; | |
58da282b | 4421 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4422 | if (laundry_wq == NULL) |
4423 | return -ENOMEM; | |
b5a1a81e BF |
4424 | ret = nfsd4_create_callback_queue(); |
4425 | if (ret) | |
4426 | goto out_free_laundry; | |
e46b498c | 4427 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4428 | set_max_delegations(); |
b5a1a81e BF |
4429 | return 0; |
4430 | out_free_laundry: | |
4431 | destroy_workqueue(laundry_wq); | |
4432 | return ret; | |
1da177e4 LT |
4433 | } |
4434 | ||
29ab23cc | 4435 | int |
76a3550e | 4436 | nfs4_state_start(void) |
1da177e4 | 4437 | { |
190e4fbf | 4438 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4439 | return __nfs4_state_start(); |
1da177e4 LT |
4440 | } |
4441 | ||
1da177e4 LT |
4442 | static void |
4443 | __nfs4_state_shutdown(void) | |
4444 | { | |
4445 | int i; | |
4446 | struct nfs4_client *clp = NULL; | |
4447 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4448 | struct list_head *pos, *next, reaplist; |
4449 | ||
1da177e4 LT |
4450 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4451 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4452 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4453 | expire_client(clp); | |
4454 | } | |
4455 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4456 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4457 | expire_client(clp); | |
4458 | } | |
4459 | } | |
4460 | INIT_LIST_HEAD(&reaplist); | |
4461 | spin_lock(&recall_lock); | |
4462 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4463 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4464 | list_move(&dp->dl_recall_lru, &reaplist); | |
4465 | } | |
4466 | spin_unlock(&recall_lock); | |
4467 | list_for_each_safe(pos, next, &reaplist) { | |
4468 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4469 | list_del_init(&dp->dl_recall_lru); | |
4470 | unhash_delegation(dp); | |
4471 | } | |
4472 | ||
190e4fbf | 4473 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4474 | } |
4475 | ||
4476 | void | |
4477 | nfs4_state_shutdown(void) | |
4478 | { | |
afe2c511 | 4479 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4480 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4481 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4482 | nfs4_lock_state(); |
4483 | nfs4_release_reclaim(); | |
4484 | __nfs4_state_shutdown(); | |
1da177e4 | 4485 | nfs4_unlock_state(); |
c3935e30 | 4486 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4487 | } |