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