]>
Commit | Line | Data |
---|---|---|
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> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 43 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 44 | #include "xdr4.h" |
0a3adade | 45 | #include "vfs.h" |
bfa4b365 | 46 | #include "current_stateid.h" |
99dbb8fe | 47 | #include "fault_inject.h" |
1da177e4 | 48 | |
5e1533c7 SK |
49 | #include "netns.h" |
50 | ||
1da177e4 LT |
51 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
52 | ||
53 | /* Globals */ | |
cf07d2ea | 54 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 55 | time_t nfsd4_grace = 90; |
f32f3c2d BF |
56 | |
57 | #define all_ones {{~0,~0},~0} | |
58 | static const stateid_t one_stateid = { | |
59 | .si_generation = ~0, | |
60 | .si_opaque = all_ones, | |
61 | }; | |
62 | static const stateid_t zero_stateid = { | |
63 | /* all fields zero */ | |
64 | }; | |
19ff0f28 TM |
65 | static const stateid_t currentstateid = { |
66 | .si_generation = 1, | |
67 | }; | |
f32f3c2d | 68 | |
ec6b5d7b | 69 | static u64 current_sessionid = 1; |
fd39ca9a | 70 | |
f32f3c2d BF |
71 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
72 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 73 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fe0750e5 | 76 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 77 | |
8b671b80 BF |
78 | /* Locking: */ |
79 | ||
80 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 81 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 82 | |
8b671b80 BF |
83 | /* |
84 | * Currently used for the del_recall_lru and file hash table. In an | |
85 | * effort to decrease the scope of the client_mutex, this spinlock may | |
86 | * eventually cover more: | |
87 | */ | |
88 | static DEFINE_SPINLOCK(recall_lock); | |
89 | ||
fe0750e5 BF |
90 | static struct kmem_cache *openowner_slab = NULL; |
91 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
92 | static struct kmem_cache *file_slab = NULL; |
93 | static struct kmem_cache *stateid_slab = NULL; | |
94 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 95 | |
1da177e4 LT |
96 | void |
97 | nfs4_lock_state(void) | |
98 | { | |
353ab6e9 | 99 | mutex_lock(&client_mutex); |
1da177e4 LT |
100 | } |
101 | ||
508dc6e1 BH |
102 | static void free_session(struct kref *); |
103 | ||
104 | /* Must be called under the client_lock */ | |
105 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
106 | { | |
107 | kref_put(&ses->se_ref, free_session); | |
108 | } | |
109 | ||
110 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
111 | { | |
112 | kref_get(&ses->se_ref); | |
113 | } | |
114 | ||
1da177e4 LT |
115 | void |
116 | nfs4_unlock_state(void) | |
117 | { | |
353ab6e9 | 118 | mutex_unlock(&client_mutex); |
1da177e4 LT |
119 | } |
120 | ||
121 | static inline u32 | |
122 | opaque_hashval(const void *ptr, int nbytes) | |
123 | { | |
124 | unsigned char *cptr = (unsigned char *) ptr; | |
125 | ||
126 | u32 x = 0; | |
127 | while (nbytes--) { | |
128 | x *= 37; | |
129 | x += *cptr++; | |
130 | } | |
131 | return x; | |
132 | } | |
133 | ||
1da177e4 LT |
134 | static struct list_head del_recall_lru; |
135 | ||
32513b40 BF |
136 | static void nfsd4_free_file(struct nfs4_file *f) |
137 | { | |
138 | kmem_cache_free(file_slab, f); | |
139 | } | |
140 | ||
13cd2184 N |
141 | static inline void |
142 | put_nfs4_file(struct nfs4_file *fi) | |
143 | { | |
8b671b80 BF |
144 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
145 | list_del(&fi->fi_hash); | |
146 | spin_unlock(&recall_lock); | |
147 | iput(fi->fi_inode); | |
32513b40 | 148 | nfsd4_free_file(fi); |
8b671b80 | 149 | } |
13cd2184 N |
150 | } |
151 | ||
152 | static inline void | |
153 | get_nfs4_file(struct nfs4_file *fi) | |
154 | { | |
8b671b80 | 155 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
156 | } |
157 | ||
ef0f3390 | 158 | static int num_delegations; |
c2f1a551 | 159 | unsigned int max_delegations; |
ef0f3390 N |
160 | |
161 | /* | |
162 | * Open owner state (share locks) | |
163 | */ | |
164 | ||
16bfdaaf BF |
165 | /* hash tables for lock and open owners */ |
166 | #define OWNER_HASH_BITS 8 | |
167 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
168 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 169 | |
16bfdaaf | 170 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
171 | { |
172 | unsigned int ret; | |
173 | ||
174 | ret = opaque_hashval(ownername->data, ownername->len); | |
175 | ret += clientid; | |
16bfdaaf | 176 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 177 | } |
ef0f3390 | 178 | |
16bfdaaf | 179 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
180 | |
181 | /* hash table for nfs4_file */ | |
182 | #define FILE_HASH_BITS 8 | |
183 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 184 | |
ddc04c41 BF |
185 | static unsigned int file_hashval(struct inode *ino) |
186 | { | |
187 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
188 | return hash_ptr(ino, FILE_HASH_BITS); | |
189 | } | |
190 | ||
ef0f3390 | 191 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 192 | |
998db52c | 193 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
194 | { |
195 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
196 | atomic_inc(&fp->fi_access[oflag]); | |
197 | } | |
198 | ||
998db52c BF |
199 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
200 | { | |
201 | if (oflag == O_RDWR) { | |
202 | __nfs4_file_get_access(fp, O_RDONLY); | |
203 | __nfs4_file_get_access(fp, O_WRONLY); | |
204 | } else | |
205 | __nfs4_file_get_access(fp, oflag); | |
206 | } | |
207 | ||
208 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
209 | { |
210 | if (fp->fi_fds[oflag]) { | |
211 | fput(fp->fi_fds[oflag]); | |
212 | fp->fi_fds[oflag] = NULL; | |
213 | } | |
214 | } | |
215 | ||
998db52c | 216 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
217 | { |
218 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 219 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
220 | /* |
221 | * It's also safe to get rid of the RDWR open *if* | |
222 | * we no longer have need of the other kind of access | |
223 | * or if we already have the other kind of open: | |
224 | */ | |
225 | if (fp->fi_fds[1-oflag] | |
226 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
227 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
228 | } |
229 | } | |
230 | ||
998db52c BF |
231 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
232 | { | |
233 | if (oflag == O_RDWR) { | |
234 | __nfs4_file_put_access(fp, O_RDONLY); | |
235 | __nfs4_file_put_access(fp, O_WRONLY); | |
236 | } else | |
237 | __nfs4_file_put_access(fp, oflag); | |
238 | } | |
239 | ||
6136d2b4 | 240 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 241 | { |
6136d2b4 | 242 | static int min_stateid = 0; |
38c2f4b1 | 243 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
244 | int new_stid; |
245 | int error; | |
246 | ||
38c2f4b1 | 247 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 248 | /* |
996e0938 BF |
249 | * Note: the necessary preallocation was done in |
250 | * nfs4_alloc_stateid(). The idr code caps the number of | |
251 | * preallocations that can exist at a time, but the state lock | |
252 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
253 | */ |
254 | BUG_ON(error); | |
255 | /* | |
256 | * It shouldn't be a problem to reuse an opaque stateid value. | |
257 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
258 | * example, a stray write retransmission could be accepted by | |
259 | * the server when it should have been rejected. Therefore, | |
260 | * adopt a trick from the sctp code to attempt to maximize the | |
261 | * amount of time until an id is reused, by ensuring they always | |
262 | * "increase" (mod INT_MAX): | |
263 | */ | |
36d44c60 | 264 | |
6136d2b4 BF |
265 | min_stateid = new_stid+1; |
266 | if (min_stateid == INT_MAX) | |
267 | min_stateid = 0; | |
268 | return new_stid; | |
36d44c60 BF |
269 | } |
270 | ||
996e0938 | 271 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
272 | { |
273 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 274 | int new_id; |
2a74aba7 BF |
275 | |
276 | stid->sc_type = type; | |
277 | stid->sc_client = cl; | |
278 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 279 | new_id = get_new_stid(stid); |
6136d2b4 | 280 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
281 | /* Will be incremented before return to client: */ |
282 | s->si_generation = 0; | |
996e0938 BF |
283 | } |
284 | ||
285 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
286 | { | |
287 | struct idr *stateids = &cl->cl_stateids; | |
288 | ||
289 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
290 | return NULL; | |
291 | /* | |
292 | * Note: if we fail here (or any time between now and the time | |
293 | * we actually get the new idr), we won't need to undo the idr | |
294 | * preallocation, since the idr code caps the number of | |
295 | * preallocated entries. | |
296 | */ | |
297 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
298 | } |
299 | ||
4cdc951b BF |
300 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
301 | { | |
302 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
303 | } | |
304 | ||
1da177e4 | 305 | static struct nfs4_delegation * |
dcef0413 | 306 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
307 | { |
308 | struct nfs4_delegation *dp; | |
309 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
310 | |
311 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
312 | /* |
313 | * Major work on the lease subsystem (for example, to support | |
314 | * calbacks on stat) will be required before we can support | |
315 | * write delegations properly. | |
316 | */ | |
317 | if (type != NFS4_OPEN_DELEGATE_READ) | |
318 | return NULL; | |
47f9940c MS |
319 | if (fp->fi_had_conflict) |
320 | return NULL; | |
c2f1a551 | 321 | if (num_delegations > max_delegations) |
ef0f3390 | 322 | return NULL; |
996e0938 | 323 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 324 | if (dp == NULL) |
1da177e4 | 325 | return dp; |
996e0938 | 326 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
327 | /* |
328 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
329 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
330 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
331 | */ |
332 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 333 | num_delegations++; |
ea1da636 N |
334 | INIT_LIST_HEAD(&dp->dl_perfile); |
335 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 336 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 337 | get_nfs4_file(fp); |
1da177e4 | 338 | dp->dl_file = fp; |
1da177e4 | 339 | dp->dl_type = type; |
6c02eaa1 | 340 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
341 | dp->dl_time = 0; |
342 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 343 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
344 | return dp; |
345 | } | |
346 | ||
347 | void | |
348 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
349 | { | |
350 | if (atomic_dec_and_test(&dp->dl_count)) { | |
351 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 352 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 353 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 354 | num_delegations--; |
1da177e4 LT |
355 | } |
356 | } | |
357 | ||
acfdf5c3 | 358 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 359 | { |
acfdf5c3 BF |
360 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
361 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
362 | fp->fi_lease = NULL; | |
4ee63624 | 363 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
364 | fp->fi_deleg_file = NULL; |
365 | } | |
1da177e4 LT |
366 | } |
367 | ||
6136d2b4 BF |
368 | static void unhash_stid(struct nfs4_stid *s) |
369 | { | |
38c2f4b1 BF |
370 | struct idr *stateids = &s->sc_client->cl_stateids; |
371 | ||
372 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
373 | } |
374 | ||
1da177e4 LT |
375 | /* Called under the state lock. */ |
376 | static void | |
377 | unhash_delegation(struct nfs4_delegation *dp) | |
378 | { | |
6136d2b4 | 379 | unhash_stid(&dp->dl_stid); |
ea1da636 | 380 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 381 | spin_lock(&recall_lock); |
5d926e8c | 382 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
383 | list_del_init(&dp->dl_recall_lru); |
384 | spin_unlock(&recall_lock); | |
acfdf5c3 | 385 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
386 | nfs4_put_delegation(dp); |
387 | } | |
388 | ||
389 | /* | |
390 | * SETCLIENTID state | |
391 | */ | |
392 | ||
36acb66b | 393 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
394 | static DEFINE_SPINLOCK(client_lock); |
395 | ||
1da177e4 LT |
396 | /* Hash tables for nfs4_clientid state */ |
397 | #define CLIENT_HASH_BITS 4 | |
398 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
399 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
400 | ||
ddc04c41 BF |
401 | static unsigned int clientid_hashval(u32 id) |
402 | { | |
403 | return id & CLIENT_HASH_MASK; | |
404 | } | |
405 | ||
406 | static unsigned int clientstr_hashval(const char *name) | |
407 | { | |
408 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
409 | } | |
410 | ||
1da177e4 LT |
411 | /* |
412 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
413 | * used in reboot/reset lease grace period processing | |
414 | * | |
415 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
416 | * setclientid_confirmed info. | |
417 | * | |
418 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
419 | * setclientid info. | |
420 | * | |
421 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
422 | * for lease renewal. | |
423 | * | |
424 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
425 | * for last close replay. | |
426 | */ | |
427 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
428 | static int reclaim_str_hashtbl_size = 0; | |
429 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
430 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
431 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
432 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
433 | static struct list_head client_lru; | |
434 | static struct list_head close_lru; | |
435 | ||
f9d7562f BF |
436 | /* |
437 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
438 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
439 | * only what share bits are currently in force, but also what | |
440 | * combinations of share bits previous opens have used. This allows us | |
441 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
442 | * return an error if the client attempt to downgrade to a combination | |
443 | * of share bits not explicable by closing some of its previous opens. | |
444 | * | |
445 | * XXX: This enforcement is actually incomplete, since we don't keep | |
446 | * track of access/deny bit combinations; so, e.g., we allow: | |
447 | * | |
448 | * OPEN allow read, deny write | |
449 | * OPEN allow both, deny none | |
450 | * DOWNGRADE allow read, deny none | |
451 | * | |
452 | * which we should reject. | |
453 | */ | |
5ae037e5 JL |
454 | static unsigned int |
455 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 456 | int i; |
5ae037e5 | 457 | unsigned int access = 0; |
f9d7562f | 458 | |
f9d7562f BF |
459 | for (i = 1; i < 4; i++) { |
460 | if (test_bit(i, &bmap)) | |
5ae037e5 | 461 | access |= i; |
f9d7562f | 462 | } |
5ae037e5 | 463 | return access; |
f9d7562f BF |
464 | } |
465 | ||
3a328614 | 466 | static bool |
dcef0413 | 467 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
468 | unsigned int access, deny; |
469 | ||
5ae037e5 JL |
470 | access = bmap_to_share_mode(stp->st_access_bmap); |
471 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 472 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
473 | return false; |
474 | return true; | |
f9d7562f BF |
475 | } |
476 | ||
82c5ff1b JL |
477 | /* set share access for a given stateid */ |
478 | static inline void | |
479 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
480 | { | |
481 | __set_bit(access, &stp->st_access_bmap); | |
482 | } | |
483 | ||
484 | /* clear share access for a given stateid */ | |
485 | static inline void | |
486 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
487 | { | |
488 | __clear_bit(access, &stp->st_access_bmap); | |
489 | } | |
490 | ||
491 | /* test whether a given stateid has access */ | |
492 | static inline bool | |
493 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
494 | { | |
495 | return test_bit(access, &stp->st_access_bmap); | |
496 | } | |
497 | ||
ce0fc43c JL |
498 | /* set share deny for a given stateid */ |
499 | static inline void | |
500 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
501 | { | |
502 | __set_bit(access, &stp->st_deny_bmap); | |
503 | } | |
504 | ||
505 | /* clear share deny for a given stateid */ | |
506 | static inline void | |
507 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
508 | { | |
509 | __clear_bit(access, &stp->st_deny_bmap); | |
510 | } | |
511 | ||
512 | /* test whether a given stateid is denying specific access */ | |
513 | static inline bool | |
514 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
515 | { | |
516 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
517 | } |
518 | ||
519 | static int nfs4_access_to_omode(u32 access) | |
520 | { | |
8f34a430 | 521 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
522 | case NFS4_SHARE_ACCESS_READ: |
523 | return O_RDONLY; | |
524 | case NFS4_SHARE_ACCESS_WRITE: | |
525 | return O_WRONLY; | |
526 | case NFS4_SHARE_ACCESS_BOTH: | |
527 | return O_RDWR; | |
528 | } | |
529 | BUG(); | |
530 | } | |
531 | ||
82c5ff1b JL |
532 | /* release all access and file references for a given stateid */ |
533 | static void | |
534 | release_all_access(struct nfs4_ol_stateid *stp) | |
535 | { | |
536 | int i; | |
537 | ||
538 | for (i = 1; i < 4; i++) { | |
539 | if (test_access(i, stp)) | |
540 | nfs4_file_put_access(stp->st_file, | |
541 | nfs4_access_to_omode(i)); | |
542 | clear_access(i, stp); | |
543 | } | |
544 | } | |
545 | ||
dcef0413 | 546 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 547 | { |
529d7b2a BF |
548 | list_del(&stp->st_perfile); |
549 | list_del(&stp->st_perstateowner); | |
550 | } | |
551 | ||
dcef0413 | 552 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 553 | { |
82c5ff1b | 554 | release_all_access(stp); |
a96e5b90 | 555 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
556 | stp->st_file = NULL; |
557 | } | |
558 | ||
dcef0413 | 559 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 560 | { |
529d7b2a BF |
561 | kmem_cache_free(stateid_slab, stp); |
562 | } | |
563 | ||
dcef0413 | 564 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
565 | { |
566 | struct file *file; | |
567 | ||
568 | unhash_generic_stateid(stp); | |
6136d2b4 | 569 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
570 | file = find_any_file(stp->st_file); |
571 | if (file) | |
fe0750e5 | 572 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 573 | close_generic_stateid(stp); |
529d7b2a BF |
574 | free_generic_stateid(stp); |
575 | } | |
576 | ||
fe0750e5 | 577 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 578 | { |
dcef0413 | 579 | struct nfs4_ol_stateid *stp; |
529d7b2a | 580 | |
fe0750e5 BF |
581 | list_del(&lo->lo_owner.so_strhash); |
582 | list_del(&lo->lo_perstateid); | |
009673b4 | 583 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
584 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
585 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 586 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
587 | release_lock_stateid(stp); |
588 | } | |
589 | } | |
590 | ||
fe0750e5 | 591 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 592 | { |
fe0750e5 BF |
593 | unhash_lockowner(lo); |
594 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
595 | } |
596 | ||
597 | static void | |
dcef0413 | 598 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 599 | { |
fe0750e5 | 600 | struct nfs4_lockowner *lo; |
529d7b2a BF |
601 | |
602 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
603 | lo = list_entry(open_stp->st_lockowners.next, |
604 | struct nfs4_lockowner, lo_perstateid); | |
605 | release_lockowner(lo); | |
529d7b2a BF |
606 | } |
607 | } | |
608 | ||
38c387b5 | 609 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
610 | { |
611 | unhash_generic_stateid(stp); | |
612 | release_stateid_lockowners(stp); | |
38c387b5 BF |
613 | close_generic_stateid(stp); |
614 | } | |
615 | ||
616 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
617 | { | |
618 | unhash_open_stateid(stp); | |
6136d2b4 | 619 | unhash_stid(&stp->st_stid); |
2283963f BF |
620 | free_generic_stateid(stp); |
621 | } | |
622 | ||
fe0750e5 | 623 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 624 | { |
dcef0413 | 625 | struct nfs4_ol_stateid *stp; |
f1d110ca | 626 | |
fe0750e5 BF |
627 | list_del(&oo->oo_owner.so_strhash); |
628 | list_del(&oo->oo_perclient); | |
629 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
630 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 631 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 632 | release_open_stateid(stp); |
f1d110ca BF |
633 | } |
634 | } | |
635 | ||
f7a4d872 BF |
636 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
637 | { | |
638 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
639 | ||
640 | if (s) { | |
6136d2b4 | 641 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
642 | free_generic_stateid(s); |
643 | oo->oo_last_closed_stid = NULL; | |
644 | } | |
645 | } | |
646 | ||
fe0750e5 | 647 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 648 | { |
fe0750e5 BF |
649 | unhash_openowner(oo); |
650 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 651 | release_last_closed_stateid(oo); |
fe0750e5 | 652 | nfs4_free_openowner(oo); |
f1d110ca BF |
653 | } |
654 | ||
5282fd72 ME |
655 | #define SESSION_HASH_SIZE 512 |
656 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
657 | ||
658 | static inline int | |
659 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
660 | { | |
661 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
662 | ||
663 | return sid->sequence % SESSION_HASH_SIZE; | |
664 | } | |
665 | ||
8f199b82 | 666 | #ifdef NFSD_DEBUG |
5282fd72 ME |
667 | static inline void |
668 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
669 | { | |
670 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
671 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
672 | } | |
8f199b82 TM |
673 | #else |
674 | static inline void | |
675 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
676 | { | |
677 | } | |
678 | #endif | |
679 | ||
5282fd72 | 680 | |
ec6b5d7b AA |
681 | static void |
682 | gen_sessionid(struct nfsd4_session *ses) | |
683 | { | |
684 | struct nfs4_client *clp = ses->se_client; | |
685 | struct nfsd4_sessionid *sid; | |
686 | ||
687 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
688 | sid->clientid = clp->cl_clientid; | |
689 | sid->sequence = current_sessionid++; | |
690 | sid->reserved = 0; | |
691 | } | |
692 | ||
693 | /* | |
a649637c AA |
694 | * The protocol defines ca_maxresponssize_cached to include the size of |
695 | * the rpc header, but all we need to cache is the data starting after | |
696 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
697 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
698 | * value that is the number of bytes in our cache plus a few additional | |
699 | * bytes. In order to stay on the safe side, and not promise more than | |
700 | * we can cache, those additional bytes must be the minimum possible: 24 | |
701 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
702 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
703 | * for the SEQUENCE op response: | |
704 | */ | |
705 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
706 | ||
557ce264 AA |
707 | static void |
708 | free_session_slots(struct nfsd4_session *ses) | |
709 | { | |
710 | int i; | |
711 | ||
712 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
713 | kfree(ses->se_slots[i]); | |
714 | } | |
715 | ||
a649637c | 716 | /* |
efe0cb6d BF |
717 | * We don't actually need to cache the rpc and session headers, so we |
718 | * can allocate a little less for each slot: | |
719 | */ | |
720 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
721 | { | |
722 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
723 | } | |
724 | ||
5b6feee9 | 725 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 726 | { |
5b6feee9 BF |
727 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
728 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 729 | |
5b6feee9 BF |
730 | return size; |
731 | } | |
ec6b5d7b | 732 | |
5b6feee9 BF |
733 | /* |
734 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 735 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 736 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 737 | */ |
5b6feee9 | 738 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 739 | { |
5b6feee9 | 740 | int avail; |
ec6b5d7b | 741 | |
5b6feee9 | 742 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 743 | |
5b6feee9 BF |
744 | spin_lock(&nfsd_drc_lock); |
745 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
746 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
747 | num = min_t(int, num, avail / slotsize); | |
748 | nfsd_drc_mem_used += num * slotsize; | |
749 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 750 | |
5b6feee9 BF |
751 | return num; |
752 | } | |
ec6b5d7b | 753 | |
5b6feee9 BF |
754 | static void nfsd4_put_drc_mem(int slotsize, int num) |
755 | { | |
4bd9b0f4 | 756 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 757 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 758 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 759 | } |
ec6b5d7b | 760 | |
5b6feee9 BF |
761 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
762 | { | |
763 | struct nfsd4_session *new; | |
764 | int mem, i; | |
a649637c | 765 | |
5b6feee9 BF |
766 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
767 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
768 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 769 | |
5b6feee9 BF |
770 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
771 | if (!new) | |
772 | return NULL; | |
557ce264 | 773 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
774 | for (i = 0; i < numslots; i++) { |
775 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
776 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
777 | if (!new->se_slots[i]) | |
557ce264 | 778 | goto out_free; |
557ce264 | 779 | } |
5b6feee9 BF |
780 | return new; |
781 | out_free: | |
782 | while (i--) | |
783 | kfree(new->se_slots[i]); | |
784 | kfree(new); | |
785 | return NULL; | |
ec6b5d7b AA |
786 | } |
787 | ||
5b6feee9 | 788 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 789 | { |
5b6feee9 | 790 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 791 | |
5b6feee9 | 792 | new->maxreqs = numslots; |
d2b21743 MJ |
793 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
794 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
795 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
796 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
797 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
798 | } | |
ec6b5d7b | 799 | |
19cf5c02 BF |
800 | static void free_conn(struct nfsd4_conn *c) |
801 | { | |
802 | svc_xprt_put(c->cn_xprt); | |
803 | kfree(c); | |
804 | } | |
ec6b5d7b | 805 | |
19cf5c02 BF |
806 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
807 | { | |
808 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
809 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 810 | |
19cf5c02 BF |
811 | spin_lock(&clp->cl_lock); |
812 | if (!list_empty(&c->cn_persession)) { | |
813 | list_del(&c->cn_persession); | |
814 | free_conn(c); | |
815 | } | |
816 | spin_unlock(&clp->cl_lock); | |
eea49806 | 817 | nfsd4_probe_callback(clp); |
19cf5c02 | 818 | } |
ec6b5d7b | 819 | |
d29c374c | 820 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 821 | { |
c7662518 | 822 | struct nfsd4_conn *conn; |
ec6b5d7b | 823 | |
c7662518 BF |
824 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
825 | if (!conn) | |
db90681d | 826 | return NULL; |
c7662518 BF |
827 | svc_xprt_get(rqstp->rq_xprt); |
828 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 829 | conn->cn_flags = flags; |
db90681d BF |
830 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
831 | return conn; | |
832 | } | |
a649637c | 833 | |
328ead28 BF |
834 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
835 | { | |
836 | conn->cn_session = ses; | |
837 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
838 | } |
839 | ||
db90681d | 840 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 841 | { |
db90681d | 842 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 843 | |
c7662518 | 844 | spin_lock(&clp->cl_lock); |
328ead28 | 845 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 846 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
847 | } |
848 | ||
21b75b01 | 849 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 850 | { |
19cf5c02 | 851 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 852 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
853 | } |
854 | ||
1d1bc8f2 | 855 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 856 | { |
db90681d | 857 | struct nfsd4_conn *conn; |
21b75b01 | 858 | int ret; |
ec6b5d7b | 859 | |
1d1bc8f2 | 860 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
861 | if (!conn) |
862 | return nfserr_jukebox; | |
863 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
864 | ret = nfsd4_register_conn(conn); |
865 | if (ret) | |
866 | /* oops; xprt is already down: */ | |
867 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
24119673 WAA |
868 | if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && |
869 | dir & NFS4_CDFC4_BACK) { | |
870 | /* callback channel may be back up */ | |
871 | nfsd4_probe_callback(ses->se_client); | |
872 | } | |
c7662518 BF |
873 | return nfs_ok; |
874 | } | |
ec6b5d7b | 875 | |
1d1bc8f2 BF |
876 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
877 | { | |
878 | u32 dir = NFS4_CDFC4_FORE; | |
879 | ||
880 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
881 | dir |= NFS4_CDFC4_BACK; | |
882 | ||
883 | return nfsd4_new_conn(rqstp, ses, dir); | |
884 | } | |
885 | ||
886 | /* must be called under client_lock */ | |
19cf5c02 | 887 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 888 | { |
19cf5c02 BF |
889 | struct nfs4_client *clp = s->se_client; |
890 | struct nfsd4_conn *c; | |
ec6b5d7b | 891 | |
19cf5c02 BF |
892 | spin_lock(&clp->cl_lock); |
893 | while (!list_empty(&s->se_conns)) { | |
894 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
895 | list_del_init(&c->cn_persession); | |
896 | spin_unlock(&clp->cl_lock); | |
557ce264 | 897 | |
19cf5c02 BF |
898 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
899 | free_conn(c); | |
ec6b5d7b | 900 | |
19cf5c02 BF |
901 | spin_lock(&clp->cl_lock); |
902 | } | |
903 | spin_unlock(&clp->cl_lock); | |
c7662518 | 904 | } |
ec6b5d7b | 905 | |
508dc6e1 | 906 | static void free_session(struct kref *kref) |
c7662518 BF |
907 | { |
908 | struct nfsd4_session *ses; | |
909 | int mem; | |
910 | ||
bc2df47a | 911 | lockdep_assert_held(&client_lock); |
c7662518 | 912 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 913 | nfsd4_del_conns(ses); |
c7662518 BF |
914 | spin_lock(&nfsd_drc_lock); |
915 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
916 | nfsd_drc_mem_used -= mem; | |
917 | spin_unlock(&nfsd_drc_lock); | |
918 | free_session_slots(ses); | |
919 | kfree(ses); | |
920 | } | |
921 | ||
508dc6e1 BH |
922 | void nfsd4_put_session(struct nfsd4_session *ses) |
923 | { | |
924 | spin_lock(&client_lock); | |
925 | nfsd4_put_session_locked(ses); | |
926 | spin_unlock(&client_lock); | |
927 | } | |
928 | ||
ac7c46f2 | 929 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
930 | { |
931 | struct nfsd4_session *new; | |
932 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
933 | int numslots, slotsize; | |
57b7b43b | 934 | __be32 status; |
5b6feee9 BF |
935 | int idx; |
936 | ||
937 | /* | |
938 | * Note decreasing slot size below client's request may | |
939 | * make it difficult for client to function correctly, whereas | |
940 | * decreasing the number of slots will (just?) affect | |
941 | * performance. When short on memory we therefore prefer to | |
942 | * decrease number of slots instead of their size. | |
943 | */ | |
944 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
945 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
946 | if (numslots < 1) |
947 | return NULL; | |
5b6feee9 BF |
948 | |
949 | new = alloc_session(slotsize, numslots); | |
950 | if (!new) { | |
951 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 952 | return NULL; |
557ce264 | 953 | } |
5b6feee9 | 954 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 955 | |
ec6b5d7b AA |
956 | new->se_client = clp; |
957 | gen_sessionid(new); | |
ec6b5d7b | 958 | |
c7662518 BF |
959 | INIT_LIST_HEAD(&new->se_conns); |
960 | ||
ac7c46f2 | 961 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 962 | new->se_flags = cses->flags; |
8b5ce5cd | 963 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 964 | kref_init(&new->se_ref); |
5b6feee9 | 965 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 966 | spin_lock(&client_lock); |
ec6b5d7b | 967 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 968 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 969 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 970 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 971 | spin_unlock(&client_lock); |
ec6b5d7b | 972 | |
1d1bc8f2 | 973 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 974 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 975 | if (status) { |
508dc6e1 | 976 | spin_lock(&client_lock); |
c7662518 | 977 | free_session(&new->se_ref); |
508dc6e1 | 978 | spin_unlock(&client_lock); |
ac7c46f2 | 979 | return NULL; |
c7662518 | 980 | } |
dcbeaa68 | 981 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 982 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
983 | /* |
984 | * This is a little silly; with sessions there's no real | |
985 | * use for the callback address. Use the peer address | |
986 | * as a reasonable default for now, but consider fixing | |
987 | * the rpc client not to require an address in the | |
988 | * future: | |
989 | */ | |
edd76786 BF |
990 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
991 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 992 | } |
dcbeaa68 | 993 | nfsd4_probe_callback(clp); |
ac7c46f2 | 994 | return new; |
ec6b5d7b AA |
995 | } |
996 | ||
9089f1b4 | 997 | /* caller must hold client_lock */ |
5282fd72 ME |
998 | static struct nfsd4_session * |
999 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
1000 | { | |
1001 | struct nfsd4_session *elem; | |
1002 | int idx; | |
1003 | ||
1004 | dump_sessionid(__func__, sessionid); | |
1005 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
1006 | /* Search in the appropriate list */ |
1007 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
1008 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1009 | NFS4_MAX_SESSIONID_LEN)) { | |
1010 | return elem; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | dprintk("%s: session not found\n", __func__); | |
1015 | return NULL; | |
1016 | } | |
1017 | ||
9089f1b4 | 1018 | /* caller must hold client_lock */ |
7116ed6b | 1019 | static void |
5282fd72 | 1020 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1021 | { |
1022 | list_del(&ses->se_hash); | |
4c649378 | 1023 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1024 | list_del(&ses->se_perclnt); |
4c649378 | 1025 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1026 | } |
1027 | ||
36acb66b | 1028 | /* must be called under the client_lock */ |
1da177e4 | 1029 | static inline void |
36acb66b | 1030 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1031 | { |
07cd4909 | 1032 | if (is_client_expired(clp)) { |
7447758b BF |
1033 | WARN_ON(1); |
1034 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1035 | __func__, |
1036 | clp->cl_clientid.cl_boot, | |
1037 | clp->cl_clientid.cl_id); | |
1038 | return; | |
1039 | } | |
1040 | ||
1da177e4 LT |
1041 | dprintk("renewing client (clientid %08x/%08x)\n", |
1042 | clp->cl_clientid.cl_boot, | |
1043 | clp->cl_clientid.cl_id); | |
1044 | list_move_tail(&clp->cl_lru, &client_lru); | |
1045 | clp->cl_time = get_seconds(); | |
1046 | } | |
1047 | ||
36acb66b BH |
1048 | static inline void |
1049 | renew_client(struct nfs4_client *clp) | |
1050 | { | |
1051 | spin_lock(&client_lock); | |
1052 | renew_client_locked(clp); | |
1053 | spin_unlock(&client_lock); | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1057 | static int | |
2c142baa | 1058 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1059 | { |
2c142baa | 1060 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1061 | return 0; |
60adfc50 | 1062 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1063 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1064 | return 1; |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * XXX Should we use a slab cache ? | |
1069 | * This type of memory management is somewhat inefficient, but we use it | |
1070 | * anyway since SETCLIENTID is not a common operation. | |
1071 | */ | |
35bba9a3 | 1072 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1073 | { |
1074 | struct nfs4_client *clp; | |
1075 | ||
35bba9a3 BF |
1076 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1077 | if (clp == NULL) | |
1078 | return NULL; | |
67114fe6 | 1079 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1080 | if (clp->cl_name.data == NULL) { |
1081 | kfree(clp); | |
1082 | return NULL; | |
1da177e4 | 1083 | } |
35bba9a3 | 1084 | clp->cl_name.len = name.len; |
1da177e4 LT |
1085 | return clp; |
1086 | } | |
1087 | ||
1088 | static inline void | |
1089 | free_client(struct nfs4_client *clp) | |
1090 | { | |
bc2df47a | 1091 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1092 | while (!list_empty(&clp->cl_sessions)) { |
1093 | struct nfsd4_session *ses; | |
1094 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1095 | se_perclnt); | |
1096 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1097 | nfsd4_put_session_locked(ses); |
792c95dd | 1098 | } |
03a4e1f6 | 1099 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1100 | kfree(clp->cl_name.data); |
1101 | kfree(clp); | |
1102 | } | |
1103 | ||
d7682988 BH |
1104 | void |
1105 | release_session_client(struct nfsd4_session *session) | |
1106 | { | |
1107 | struct nfs4_client *clp = session->se_client; | |
1108 | ||
1109 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1110 | return; | |
1111 | if (is_client_expired(clp)) { | |
1112 | free_client(clp); | |
1113 | session->se_client = NULL; | |
1114 | } else | |
1115 | renew_client_locked(clp); | |
1116 | spin_unlock(&client_lock); | |
d7682988 BH |
1117 | } |
1118 | ||
84d38ac9 BH |
1119 | /* must be called under the client_lock */ |
1120 | static inline void | |
1121 | unhash_client_locked(struct nfs4_client *clp) | |
1122 | { | |
792c95dd BF |
1123 | struct nfsd4_session *ses; |
1124 | ||
07cd4909 | 1125 | mark_client_expired(clp); |
84d38ac9 | 1126 | list_del(&clp->cl_lru); |
4c649378 | 1127 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1128 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1129 | list_del_init(&ses->se_hash); | |
4c649378 | 1130 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1131 | } |
1132 | ||
1da177e4 LT |
1133 | static void |
1134 | expire_client(struct nfs4_client *clp) | |
1135 | { | |
fe0750e5 | 1136 | struct nfs4_openowner *oo; |
1da177e4 | 1137 | struct nfs4_delegation *dp; |
1da177e4 LT |
1138 | struct list_head reaplist; |
1139 | ||
1da177e4 LT |
1140 | INIT_LIST_HEAD(&reaplist); |
1141 | spin_lock(&recall_lock); | |
ea1da636 N |
1142 | while (!list_empty(&clp->cl_delegations)) { |
1143 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1144 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1145 | list_move(&dp->dl_recall_lru, &reaplist); |
1146 | } | |
1147 | spin_unlock(&recall_lock); | |
1148 | while (!list_empty(&reaplist)) { | |
1149 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1150 | unhash_delegation(dp); |
1151 | } | |
ea1da636 | 1152 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1153 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1154 | release_openowner(oo); | |
1da177e4 | 1155 | } |
6ff8da08 | 1156 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1157 | if (clp->cl_cb_conn.cb_xprt) |
1158 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1159 | list_del(&clp->cl_idhash); |
1160 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1161 | spin_lock(&client_lock); |
84d38ac9 | 1162 | unhash_client_locked(clp); |
46583e25 BH |
1163 | if (atomic_read(&clp->cl_refcount) == 0) |
1164 | free_client(clp); | |
be1fdf6c | 1165 | spin_unlock(&client_lock); |
1da177e4 LT |
1166 | } |
1167 | ||
35bba9a3 BF |
1168 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1169 | { | |
1170 | memcpy(target->cl_verifier.data, source->data, | |
1171 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1172 | } |
1173 | ||
35bba9a3 BF |
1174 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1175 | { | |
1da177e4 LT |
1176 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1177 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1178 | } | |
1179 | ||
03a4e1f6 | 1180 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1181 | { |
03a4e1f6 BF |
1182 | if (source->cr_principal) { |
1183 | target->cr_principal = | |
1184 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1185 | if (target->cr_principal == NULL) | |
1186 | return -ENOMEM; | |
1187 | } else | |
1188 | target->cr_principal = NULL; | |
d5497fc6 | 1189 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1190 | target->cr_uid = source->cr_uid; |
1191 | target->cr_gid = source->cr_gid; | |
1192 | target->cr_group_info = source->cr_group_info; | |
1193 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1194 | return 0; |
1da177e4 LT |
1195 | } |
1196 | ||
35bba9a3 | 1197 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1198 | { |
a55370a3 | 1199 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | static int | |
599e0a22 BF |
1203 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1204 | { | |
1205 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | static int | |
599e0a22 BF |
1209 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1210 | { | |
1211 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1212 | } |
1213 | ||
8fbba96e BF |
1214 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1215 | { | |
1216 | int i; | |
1217 | ||
1218 | if (g1->ngroups != g2->ngroups) | |
1219 | return false; | |
1220 | for (i=0; i<g1->ngroups; i++) | |
1221 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1222 | return false; | |
1223 | return true; | |
1224 | } | |
1225 | ||
68eb3508 BF |
1226 | /* |
1227 | * RFC 3530 language requires clid_inuse be returned when the | |
1228 | * "principal" associated with a requests differs from that previously | |
1229 | * used. We use uid, gid's, and gss principal string as our best | |
1230 | * approximation. We also don't want to allow non-gss use of a client | |
1231 | * established using gss: in theory cr_principal should catch that | |
1232 | * change, but in practice cr_principal can be null even in the gss case | |
1233 | * since gssd doesn't always pass down a principal string. | |
1234 | */ | |
1235 | static bool is_gss_cred(struct svc_cred *cr) | |
1236 | { | |
1237 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1238 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1239 | } | |
1240 | ||
1241 | ||
5559b50a | 1242 | static bool |
599e0a22 BF |
1243 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1244 | { | |
68eb3508 | 1245 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1246 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1247 | || (cr1->cr_gid != cr2->cr_gid) |
1248 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1249 | return false; | |
1250 | if (cr1->cr_principal == cr2->cr_principal) | |
1251 | return true; | |
1252 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1253 | return false; | |
5559b50a | 1254 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1255 | } |
1256 | ||
5ec7b46c BF |
1257 | static void gen_clid(struct nfs4_client *clp) |
1258 | { | |
1259 | static u32 current_clientid = 1; | |
2c142baa | 1260 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
5ec7b46c | 1261 | |
2c142baa | 1262 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1263 | clp->cl_clientid.cl_id = current_clientid++; |
1264 | } | |
1265 | ||
deda2faa BF |
1266 | static void gen_confirm(struct nfs4_client *clp) |
1267 | { | |
ab4684d1 | 1268 | __be32 verf[2]; |
deda2faa | 1269 | static u32 i; |
1da177e4 | 1270 | |
ab4684d1 CL |
1271 | verf[0] = (__be32)get_seconds(); |
1272 | verf[1] = (__be32)i++; | |
1273 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1274 | } |
1275 | ||
38c2f4b1 | 1276 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1277 | { |
38c2f4b1 | 1278 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1279 | } |
1280 | ||
38c2f4b1 | 1281 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1282 | { |
1283 | struct nfs4_stid *s; | |
4d71ab87 | 1284 | |
38c2f4b1 | 1285 | s = find_stateid(cl, t); |
4d71ab87 BF |
1286 | if (!s) |
1287 | return NULL; | |
f459e453 | 1288 | if (typemask & s->sc_type) |
4581d140 | 1289 | return s; |
4581d140 BF |
1290 | return NULL; |
1291 | } | |
1292 | ||
b09333c4 RL |
1293 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1294 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1295 | { | |
1296 | struct nfs4_client *clp; | |
1297 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1298 | int ret; |
b09333c4 RL |
1299 | |
1300 | clp = alloc_client(name); | |
1301 | if (clp == NULL) | |
1302 | return NULL; | |
1303 | ||
792c95dd | 1304 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1305 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1306 | if (ret) { | |
1307 | spin_lock(&client_lock); | |
1308 | free_client(clp); | |
1309 | spin_unlock(&client_lock); | |
1310 | return NULL; | |
b09333c4 | 1311 | } |
38c2f4b1 | 1312 | idr_init(&clp->cl_stateids); |
b09333c4 | 1313 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1314 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1315 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1316 | INIT_LIST_HEAD(&clp->cl_idhash); |
1317 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1318 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1319 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1320 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1321 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1322 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1323 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1324 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1325 | clear_bit(0, &clp->cl_cb_slot_busy); |
1326 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1327 | copy_verf(clp, verf); | |
1328 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1329 | gen_confirm(clp); |
edd76786 | 1330 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1331 | return clp; |
1332 | } | |
1333 | ||
fd39ca9a | 1334 | static void |
1da177e4 LT |
1335 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1336 | { | |
1337 | unsigned int idhashval; | |
1338 | ||
1339 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1340 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1341 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1342 | renew_client(clp); |
1da177e4 LT |
1343 | } |
1344 | ||
fd39ca9a | 1345 | static void |
1da177e4 LT |
1346 | move_to_confirmed(struct nfs4_client *clp) |
1347 | { | |
1348 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1349 | unsigned int strhashval; | |
1350 | ||
1351 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1352 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1353 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1354 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1355 | renew_client(clp); |
1356 | } | |
1357 | ||
1358 | static struct nfs4_client * | |
d15c077e | 1359 | find_confirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1360 | { |
1361 | struct nfs4_client *clp; | |
1362 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1363 | ||
1364 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 | 1365 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1366 | if ((bool)clp->cl_minorversion != sessions) |
1367 | return NULL; | |
a50d2ad1 | 1368 | renew_client(clp); |
1da177e4 | 1369 | return clp; |
a50d2ad1 | 1370 | } |
1da177e4 LT |
1371 | } |
1372 | return NULL; | |
1373 | } | |
1374 | ||
1375 | static struct nfs4_client * | |
d15c077e | 1376 | find_unconfirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1377 | { |
1378 | struct nfs4_client *clp; | |
1379 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1380 | ||
1381 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
d15c077e BF |
1382 | if (same_clid(&clp->cl_clientid, clid)) { |
1383 | if ((bool)clp->cl_minorversion != sessions) | |
1384 | return NULL; | |
1da177e4 | 1385 | return clp; |
d15c077e | 1386 | } |
1da177e4 LT |
1387 | } |
1388 | return NULL; | |
1389 | } | |
1390 | ||
6e5f15c9 | 1391 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1392 | { |
6e5f15c9 | 1393 | return clp->cl_exchange_flags != 0; |
e203d506 | 1394 | } |
a1bcecd2 | 1395 | |
28ce6054 | 1396 | static struct nfs4_client * |
e203d506 | 1397 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1398 | { |
1399 | struct nfs4_client *clp; | |
1400 | ||
1401 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1402 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1403 | return clp; |
1404 | } | |
1405 | return NULL; | |
1406 | } | |
1407 | ||
1408 | static struct nfs4_client * | |
e203d506 | 1409 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1410 | { |
1411 | struct nfs4_client *clp; | |
1412 | ||
1413 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1414 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1415 | return clp; |
1416 | } | |
1417 | return NULL; | |
1418 | } | |
1419 | ||
fd39ca9a | 1420 | static void |
6f3d772f | 1421 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1422 | { |
07263f1e | 1423 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1424 | struct sockaddr *sa = svc_addr(rqstp); |
1425 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1426 | unsigned short expected_family; |
1427 | ||
1428 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1429 | if (se->se_callback_netid_len == 3 && | |
1430 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1431 | expected_family = AF_INET; | |
1432 | else if (se->se_callback_netid_len == 4 && | |
1433 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1434 | expected_family = AF_INET6; | |
1435 | else | |
1da177e4 LT |
1436 | goto out_err; |
1437 | ||
f2ac4dc9 | 1438 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1439 | se->se_callback_addr_len, |
07263f1e BF |
1440 | (struct sockaddr *)&conn->cb_addr, |
1441 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1442 | |
07263f1e | 1443 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1444 | goto out_err; |
aa9a4ec7 | 1445 | |
07263f1e BF |
1446 | if (conn->cb_addr.ss_family == AF_INET6) |
1447 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1448 | |
07263f1e BF |
1449 | conn->cb_prog = se->se_callback_prog; |
1450 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1451 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1452 | return; |
1453 | out_err: | |
07263f1e BF |
1454 | conn->cb_addr.ss_family = AF_UNSPEC; |
1455 | conn->cb_addrlen = 0; | |
849823c5 | 1456 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1457 | "will not receive delegations\n", |
1458 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1459 | ||
1da177e4 LT |
1460 | return; |
1461 | } | |
1462 | ||
074fe897 | 1463 | /* |
557ce264 | 1464 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1465 | */ |
074fe897 AA |
1466 | void |
1467 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1468 | { |
557ce264 AA |
1469 | struct nfsd4_slot *slot = resp->cstate.slot; |
1470 | unsigned int base; | |
074fe897 | 1471 | |
557ce264 | 1472 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1473 | |
557ce264 AA |
1474 | slot->sl_opcnt = resp->opcnt; |
1475 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1476 | |
bf5c43c8 | 1477 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1478 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1479 | slot->sl_datalen = 0; |
bf864a31 | 1480 | return; |
074fe897 | 1481 | } |
557ce264 AA |
1482 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1483 | base = (char *)resp->cstate.datap - | |
1484 | (char *)resp->xbuf->head[0].iov_base; | |
1485 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1486 | slot->sl_datalen)) | |
1487 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1488 | return; | |
074fe897 AA |
1489 | } |
1490 | ||
1491 | /* | |
abfabf8c AA |
1492 | * Encode the replay sequence operation from the slot values. |
1493 | * If cachethis is FALSE encode the uncached rep error on the next | |
1494 | * operation which sets resp->p and increments resp->opcnt for | |
1495 | * nfs4svc_encode_compoundres. | |
074fe897 | 1496 | * |
074fe897 | 1497 | */ |
abfabf8c AA |
1498 | static __be32 |
1499 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1500 | struct nfsd4_compoundres *resp) | |
074fe897 | 1501 | { |
abfabf8c AA |
1502 | struct nfsd4_op *op; |
1503 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1504 | |
abfabf8c AA |
1505 | /* Encode the replayed sequence operation */ |
1506 | op = &args->ops[resp->opcnt - 1]; | |
1507 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1508 | |
abfabf8c | 1509 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1510 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1511 | op = &args->ops[resp->opcnt++]; |
1512 | op->status = nfserr_retry_uncached_rep; | |
1513 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1514 | } |
abfabf8c | 1515 | return op->status; |
074fe897 AA |
1516 | } |
1517 | ||
1518 | /* | |
557ce264 AA |
1519 | * The sequence operation is not cached because we can use the slot and |
1520 | * session values. | |
074fe897 AA |
1521 | */ |
1522 | __be32 | |
bf864a31 AA |
1523 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1524 | struct nfsd4_sequence *seq) | |
074fe897 | 1525 | { |
557ce264 | 1526 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1527 | __be32 status; |
1528 | ||
557ce264 | 1529 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1530 | |
abfabf8c AA |
1531 | /* Either returns 0 or nfserr_retry_uncached */ |
1532 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1533 | if (status == nfserr_retry_uncached_rep) | |
1534 | return status; | |
074fe897 | 1535 | |
557ce264 AA |
1536 | /* The sequence operation has been encoded, cstate->datap set. */ |
1537 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1538 | |
557ce264 AA |
1539 | resp->opcnt = slot->sl_opcnt; |
1540 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1541 | status = slot->sl_status; | |
074fe897 AA |
1542 | |
1543 | return status; | |
1544 | } | |
1545 | ||
0733d213 AA |
1546 | /* |
1547 | * Set the exchange_id flags returned by the server. | |
1548 | */ | |
1549 | static void | |
1550 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1551 | { | |
1552 | /* pNFS is not supported */ | |
1553 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1554 | ||
1555 | /* Referrals are supported, Migration is not. */ | |
1556 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1557 | ||
1558 | /* set the wire flags to return to client. */ | |
1559 | clid->flags = new->cl_exchange_flags; | |
1560 | } | |
1561 | ||
631fc9ea BF |
1562 | static bool client_has_state(struct nfs4_client *clp) |
1563 | { | |
1564 | /* | |
1565 | * Note clp->cl_openowners check isn't quite right: there's no | |
1566 | * need to count owners without stateid's. | |
1567 | * | |
1568 | * Also note we should probably be using this in 4.0 case too. | |
1569 | */ | |
6eccece9 BF |
1570 | return !list_empty(&clp->cl_openowners) |
1571 | || !list_empty(&clp->cl_delegations) | |
1572 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1573 | } |
1574 | ||
069b6ad4 AA |
1575 | __be32 |
1576 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1577 | struct nfsd4_compound_state *cstate, | |
1578 | struct nfsd4_exchange_id *exid) | |
1579 | { | |
0733d213 | 1580 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1581 | __be32 status; |
0733d213 AA |
1582 | unsigned int strhashval; |
1583 | char dname[HEXDIR_LEN]; | |
363168b4 | 1584 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1585 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1586 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1587 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1588 | |
363168b4 | 1589 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1590 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1591 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1592 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1593 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1594 | |
a084daf5 | 1595 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1596 | return nfserr_inval; |
1597 | ||
1598 | /* Currently only support SP4_NONE */ | |
1599 | switch (exid->spa_how) { | |
1600 | case SP4_NONE: | |
1601 | break; | |
1602 | case SP4_SSV: | |
044bc1d4 | 1603 | return nfserr_serverfault; |
0733d213 AA |
1604 | default: |
1605 | BUG(); /* checked by xdr code */ | |
1606 | case SP4_MACH_CRED: | |
1607 | return nfserr_serverfault; /* no excuse :-/ */ | |
1608 | } | |
1609 | ||
1610 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1611 | ||
1612 | if (status) | |
2786cc3a | 1613 | return status; |
0733d213 AA |
1614 | |
1615 | strhashval = clientstr_hashval(dname); | |
1616 | ||
2dbb269d | 1617 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1618 | nfs4_lock_state(); |
e203d506 | 1619 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1620 | if (conf) { |
83e08fd4 BF |
1621 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1622 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1623 | ||
136e658d BF |
1624 | if (update) { |
1625 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1626 | status = nfserr_inval; |
1a308118 BF |
1627 | goto out; |
1628 | } | |
136e658d | 1629 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1630 | status = nfserr_perm; |
136e658d BF |
1631 | goto out; |
1632 | } | |
1633 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1634 | status = nfserr_not_same; |
1635 | goto out; | |
1636 | } | |
136e658d BF |
1637 | /* case 6 */ |
1638 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1639 | new = conf; | |
1640 | goto out_copy; | |
0733d213 | 1641 | } |
136e658d | 1642 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1643 | if (client_has_state(conf)) { |
1644 | status = nfserr_clid_inuse; | |
0733d213 AA |
1645 | goto out; |
1646 | } | |
1647 | expire_client(conf); | |
1648 | goto out_new; | |
1649 | } | |
136e658d | 1650 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1651 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1652 | new = conf; |
1653 | goto out_copy; | |
1654 | } | |
1655 | /* case 5, client reboot */ | |
136e658d | 1656 | goto out_new; |
6ddbbbfe MS |
1657 | } |
1658 | ||
2dbb269d | 1659 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1660 | status = nfserr_noent; |
1661 | goto out; | |
0733d213 AA |
1662 | } |
1663 | ||
e203d506 | 1664 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
2dbb269d | 1665 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1666 | expire_client(unconf); |
0733d213 | 1667 | |
2dbb269d | 1668 | /* case 1 (normal case) */ |
0733d213 | 1669 | out_new: |
b09333c4 | 1670 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1671 | if (new == NULL) { |
4731030d | 1672 | status = nfserr_jukebox; |
0733d213 AA |
1673 | goto out; |
1674 | } | |
c116a0af | 1675 | new->cl_minorversion = 1; |
0733d213 | 1676 | |
0733d213 | 1677 | gen_clid(new); |
0733d213 AA |
1678 | add_to_unconfirmed(new, strhashval); |
1679 | out_copy: | |
1680 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1681 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1682 | ||
778df3f0 | 1683 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1684 | nfsd4_set_ex_flags(new, exid); |
1685 | ||
1686 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1687 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1688 | status = nfs_ok; |
1689 | ||
1690 | out: | |
1691 | nfs4_unlock_state(); | |
0733d213 | 1692 | return status; |
069b6ad4 AA |
1693 | } |
1694 | ||
57b7b43b | 1695 | static __be32 |
88e588d5 | 1696 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1697 | { |
88e588d5 AA |
1698 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1699 | slot_seqid); | |
b85d4c01 BH |
1700 | |
1701 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1702 | if (slot_inuse) { |
1703 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1704 | return nfserr_jukebox; |
1705 | else | |
1706 | return nfserr_seq_misordered; | |
1707 | } | |
f6d82485 | 1708 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1709 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1710 | return nfs_ok; |
88e588d5 | 1711 | if (seqid == slot_seqid) |
b85d4c01 | 1712 | return nfserr_replay_cache; |
b85d4c01 BH |
1713 | return nfserr_seq_misordered; |
1714 | } | |
1715 | ||
49557cc7 AA |
1716 | /* |
1717 | * Cache the create session result into the create session single DRC | |
1718 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1719 | * Do this for solo or embedded create session operations. | |
1720 | */ | |
1721 | static void | |
1722 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1723 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1724 | { |
1725 | slot->sl_status = nfserr; | |
1726 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1727 | } | |
1728 | ||
1729 | static __be32 | |
1730 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1731 | struct nfsd4_clid_slot *slot) | |
1732 | { | |
1733 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1734 | return slot->sl_status; | |
1735 | } | |
1736 | ||
1b74c25b MJ |
1737 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1738 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1739 | 1 + /* MIN tag is length with zero, only length */ \ | |
1740 | 3 + /* version, opcount, opcode */ \ | |
1741 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1742 | /* seqid, slotID, slotID, cache */ \ | |
1743 | 4 ) * sizeof(__be32)) | |
1744 | ||
1745 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1746 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1747 | 1 + /* status */ \ | |
1748 | 1 + /* MIN tag is length with zero, only length */ \ | |
1749 | 3 + /* opcount, opcode, opstatus*/ \ | |
1750 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1751 | /* seqid, slotID, slotID, slotID, status */ \ | |
1752 | 5 ) * sizeof(__be32)) | |
1753 | ||
57b7b43b | 1754 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1755 | { |
1756 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1757 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1758 | } | |
1759 | ||
069b6ad4 AA |
1760 | __be32 |
1761 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1762 | struct nfsd4_compound_state *cstate, | |
1763 | struct nfsd4_create_session *cr_ses) | |
1764 | { | |
363168b4 | 1765 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1766 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1767 | struct nfsd4_session *new; |
49557cc7 | 1768 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1769 | bool confirm_me = false; |
57b7b43b | 1770 | __be32 status = 0; |
ec6b5d7b | 1771 | |
a62573dc MJ |
1772 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1773 | return nfserr_inval; | |
1774 | ||
ec6b5d7b | 1775 | nfs4_lock_state(); |
d15c077e BF |
1776 | unconf = find_unconfirmed_client(&cr_ses->clientid, true); |
1777 | conf = find_confirmed_client(&cr_ses->clientid, true); | |
ec6b5d7b AA |
1778 | |
1779 | if (conf) { | |
49557cc7 AA |
1780 | cs_slot = &conf->cl_cs_slot; |
1781 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1782 | if (status == nfserr_replay_cache) { |
49557cc7 | 1783 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1784 | goto out; |
49557cc7 | 1785 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1786 | status = nfserr_seq_misordered; |
ec6b5d7b AA |
1787 | goto out; |
1788 | } | |
ec6b5d7b AA |
1789 | } else if (unconf) { |
1790 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1791 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1792 | status = nfserr_clid_inuse; |
1793 | goto out; | |
1794 | } | |
49557cc7 AA |
1795 | cs_slot = &unconf->cl_cs_slot; |
1796 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1797 | if (status) { |
1798 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1799 | status = nfserr_seq_misordered; |
cd5b8144 | 1800 | goto out; |
ec6b5d7b | 1801 | } |
86c3e16c | 1802 | confirm_me = true; |
ec6b5d7b AA |
1803 | conf = unconf; |
1804 | } else { | |
1805 | status = nfserr_stale_clientid; | |
1806 | goto out; | |
1807 | } | |
408b79bc BF |
1808 | /* |
1809 | * We do not support RDMA or persistent sessions | |
1810 | */ | |
1811 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1812 | cr_ses->flags &= ~SESSION4_RDMA; | |
1813 | ||
1b74c25b MJ |
1814 | status = nfserr_toosmall; |
1815 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1816 | goto out; | |
1817 | ||
ac7c46f2 BF |
1818 | status = nfserr_jukebox; |
1819 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1820 | if (!new) | |
ec6b5d7b | 1821 | goto out; |
ac7c46f2 BF |
1822 | status = nfs_ok; |
1823 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1824 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1825 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1826 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1827 | cs_slot->sl_seqid++; |
49557cc7 | 1828 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1829 | |
49557cc7 AA |
1830 | /* cache solo and embedded create sessions under the state lock */ |
1831 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
b9831b59 BF |
1832 | if (confirm_me) { |
1833 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); | |
1834 | struct nfs4_client *old = | |
1835 | find_confirmed_client_by_str(conf->cl_recdir, hash); | |
1836 | if (old) | |
1837 | expire_client(old); | |
86c3e16c | 1838 | move_to_confirmed(conf); |
b9831b59 | 1839 | } |
ec6b5d7b AA |
1840 | out: |
1841 | nfs4_unlock_state(); | |
1842 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1843 | return status; | |
069b6ad4 AA |
1844 | } |
1845 | ||
57716355 BF |
1846 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1847 | { | |
1848 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1849 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1850 | ||
1851 | return argp->opcnt == resp->opcnt; | |
1852 | } | |
1853 | ||
1d1bc8f2 BF |
1854 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1855 | { | |
1856 | switch (*dir) { | |
1857 | case NFS4_CDFC4_FORE: | |
1858 | case NFS4_CDFC4_BACK: | |
1859 | return nfs_ok; | |
1860 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1861 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1862 | *dir = NFS4_CDFC4_BOTH; | |
1863 | return nfs_ok; | |
1864 | }; | |
1865 | return nfserr_inval; | |
1866 | } | |
1867 | ||
1868 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1869 | struct nfsd4_compound_state *cstate, | |
1870 | struct nfsd4_bind_conn_to_session *bcts) | |
1871 | { | |
1872 | __be32 status; | |
1873 | ||
1874 | if (!nfsd4_last_compound_op(rqstp)) | |
1875 | return nfserr_not_only_op; | |
1876 | spin_lock(&client_lock); | |
1877 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1878 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1879 | * client_lock iself: */ | |
1880 | if (cstate->session) { | |
1881 | nfsd4_get_session(cstate->session); | |
1882 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1883 | } | |
1884 | spin_unlock(&client_lock); | |
1885 | if (!cstate->session) | |
1886 | return nfserr_badsession; | |
1887 | ||
1888 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1889 | if (!status) |
1890 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1891 | return status; | |
1d1bc8f2 BF |
1892 | } |
1893 | ||
5d4cec2f BF |
1894 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1895 | { | |
1896 | if (!session) | |
1897 | return 0; | |
1898 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1899 | } | |
1900 | ||
069b6ad4 AA |
1901 | __be32 |
1902 | nfsd4_destroy_session(struct svc_rqst *r, | |
1903 | struct nfsd4_compound_state *cstate, | |
1904 | struct nfsd4_destroy_session *sessionid) | |
1905 | { | |
e10e0cfc | 1906 | struct nfsd4_session *ses; |
57b7b43b | 1907 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1908 | |
1909 | /* Notes: | |
1910 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1911 | * - Should we return nfserr_back_chan_busy if waiting for | |
1912 | * callbacks on to-be-destroyed session? | |
1913 | * - Do we need to clear any callback info from previous session? | |
1914 | */ | |
1915 | ||
5d4cec2f | 1916 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1917 | if (!nfsd4_last_compound_op(r)) |
1918 | return nfserr_not_only_op; | |
1919 | } | |
e10e0cfc | 1920 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1921 | spin_lock(&client_lock); |
e10e0cfc BH |
1922 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1923 | if (!ses) { | |
9089f1b4 | 1924 | spin_unlock(&client_lock); |
e10e0cfc BH |
1925 | goto out; |
1926 | } | |
1927 | ||
1928 | unhash_session(ses); | |
9089f1b4 | 1929 | spin_unlock(&client_lock); |
e10e0cfc | 1930 | |
ab707e15 | 1931 | nfs4_lock_state(); |
84f5f7cc | 1932 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1933 | nfs4_unlock_state(); |
19cf5c02 | 1934 | |
508dc6e1 | 1935 | spin_lock(&client_lock); |
19cf5c02 | 1936 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1937 | nfsd4_put_session_locked(ses); |
1938 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1939 | status = nfs_ok; |
1940 | out: | |
1941 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1942 | return status; | |
069b6ad4 AA |
1943 | } |
1944 | ||
a663bdd8 | 1945 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1946 | { |
1947 | struct nfsd4_conn *c; | |
1948 | ||
1949 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1950 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1951 | return c; |
1952 | } | |
1953 | } | |
1954 | return NULL; | |
1955 | } | |
1956 | ||
a663bdd8 | 1957 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1958 | { |
1959 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1960 | struct nfsd4_conn *c; |
21b75b01 | 1961 | int ret; |
328ead28 BF |
1962 | |
1963 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1964 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1965 | if (c) { |
1966 | spin_unlock(&clp->cl_lock); | |
1967 | free_conn(new); | |
1968 | return; | |
1969 | } | |
1970 | __nfsd4_hash_conn(new, ses); | |
1971 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1972 | ret = nfsd4_register_conn(new); |
1973 | if (ret) | |
1974 | /* oops; xprt is already down: */ | |
1975 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1976 | return; |
1977 | } | |
1978 | ||
868b89c3 MJ |
1979 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1980 | { | |
1981 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1982 | ||
1983 | return args->opcnt > session->se_fchannel.maxops; | |
1984 | } | |
1985 | ||
ae82a8d0 MJ |
1986 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1987 | struct nfsd4_session *session) | |
1988 | { | |
1989 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1990 | ||
1991 | return xb->len > session->se_fchannel.maxreq_sz; | |
1992 | } | |
1993 | ||
069b6ad4 | 1994 | __be32 |
b85d4c01 | 1995 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1996 | struct nfsd4_compound_state *cstate, |
1997 | struct nfsd4_sequence *seq) | |
1998 | { | |
f9bb94c4 | 1999 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2000 | struct nfsd4_session *session; |
2001 | struct nfsd4_slot *slot; | |
a663bdd8 | 2002 | struct nfsd4_conn *conn; |
57b7b43b | 2003 | __be32 status; |
b85d4c01 | 2004 | |
f9bb94c4 AA |
2005 | if (resp->opcnt != 1) |
2006 | return nfserr_sequence_pos; | |
2007 | ||
a663bdd8 BF |
2008 | /* |
2009 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2010 | * below. | |
2011 | */ | |
2012 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2013 | if (!conn) | |
2014 | return nfserr_jukebox; | |
2015 | ||
9089f1b4 | 2016 | spin_lock(&client_lock); |
b85d4c01 BH |
2017 | status = nfserr_badsession; |
2018 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
2019 | if (!session) | |
2020 | goto out; | |
2021 | ||
868b89c3 MJ |
2022 | status = nfserr_too_many_ops; |
2023 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2024 | goto out; | |
2025 | ||
ae82a8d0 MJ |
2026 | status = nfserr_req_too_big; |
2027 | if (nfsd4_request_too_big(rqstp, session)) | |
2028 | goto out; | |
2029 | ||
b85d4c01 | 2030 | status = nfserr_badslot; |
6c18ba9f | 2031 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2032 | goto out; |
2033 | ||
557ce264 | 2034 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2035 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2036 | ||
a8dfdaeb AA |
2037 | /* We do not negotiate the number of slots yet, so set the |
2038 | * maxslots to the session maxreqs which is used to encode | |
2039 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2040 | seq->maxslots = session->se_fchannel.maxreqs; | |
2041 | ||
73e79482 BF |
2042 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2043 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2044 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2045 | status = nfserr_seq_misordered; |
2046 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2047 | goto out; | |
b85d4c01 BH |
2048 | cstate->slot = slot; |
2049 | cstate->session = session; | |
da3846a2 | 2050 | /* Return the cached reply status and set cstate->status |
557ce264 | 2051 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2052 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2053 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2054 | goto out; |
b85d4c01 BH |
2055 | } |
2056 | if (status) | |
2057 | goto out; | |
2058 | ||
a663bdd8 BF |
2059 | nfsd4_sequence_check_conn(conn, session); |
2060 | conn = NULL; | |
328ead28 | 2061 | |
b85d4c01 | 2062 | /* Success! bump slot seqid */ |
b85d4c01 | 2063 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2064 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2065 | if (seq->cachethis) |
2066 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2067 | else |
2068 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2069 | |
2070 | cstate->slot = slot; | |
2071 | cstate->session = session; | |
2072 | ||
b85d4c01 | 2073 | out: |
26c0c75e | 2074 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2075 | if (cstate->session) { |
0d7bb719 BF |
2076 | struct nfs4_client *clp = session->se_client; |
2077 | ||
36acb66b | 2078 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2079 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2080 | switch (clp->cl_cb_state) { |
2081 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2082 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2083 | break; |
2084 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2085 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2086 | break; |
fc0c3dd1 BH |
2087 | default: |
2088 | seq->status_flags = 0; | |
5423732a | 2089 | } |
aaf84eb9 | 2090 | } |
a663bdd8 | 2091 | kfree(conn); |
36acb66b | 2092 | spin_unlock(&client_lock); |
b85d4c01 BH |
2093 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2094 | return status; | |
069b6ad4 AA |
2095 | } |
2096 | ||
345c2842 MJ |
2097 | __be32 |
2098 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2099 | { | |
2100 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2101 | __be32 status = 0; |
345c2842 MJ |
2102 | |
2103 | nfs4_lock_state(); | |
d15c077e BF |
2104 | unconf = find_unconfirmed_client(&dc->clientid, true); |
2105 | conf = find_confirmed_client(&dc->clientid, true); | |
345c2842 MJ |
2106 | |
2107 | if (conf) { | |
2108 | clp = conf; | |
2109 | ||
6eccece9 | 2110 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2111 | status = nfserr_clientid_busy; |
2112 | goto out; | |
2113 | } | |
2114 | ||
2115 | /* rfc5661 18.50.3 */ | |
2116 | if (cstate->session && conf == cstate->session->se_client) { | |
2117 | status = nfserr_clientid_busy; | |
2118 | goto out; | |
2119 | } | |
2120 | } else if (unconf) | |
2121 | clp = unconf; | |
2122 | else { | |
2123 | status = nfserr_stale_clientid; | |
2124 | goto out; | |
2125 | } | |
2126 | ||
2127 | expire_client(clp); | |
2128 | out: | |
2129 | nfs4_unlock_state(); | |
2130 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2131 | return status; | |
2132 | } | |
2133 | ||
4dc6ec00 BF |
2134 | __be32 |
2135 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2136 | { | |
57b7b43b | 2137 | __be32 status = 0; |
bcecf1cc | 2138 | |
4dc6ec00 BF |
2139 | if (rc->rca_one_fs) { |
2140 | if (!cstate->current_fh.fh_dentry) | |
2141 | return nfserr_nofilehandle; | |
2142 | /* | |
2143 | * We don't take advantage of the rca_one_fs case. | |
2144 | * That's OK, it's optional, we can safely ignore it. | |
2145 | */ | |
2146 | return nfs_ok; | |
2147 | } | |
bcecf1cc | 2148 | |
4dc6ec00 | 2149 | nfs4_lock_state(); |
bcecf1cc | 2150 | status = nfserr_complete_already; |
a52d726b JL |
2151 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2152 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2153 | goto out; |
2154 | ||
2155 | status = nfserr_stale_clientid; | |
2156 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2157 | /* |
2158 | * The following error isn't really legal. | |
2159 | * But we only get here if the client just explicitly | |
2160 | * destroyed the client. Surely it no longer cares what | |
2161 | * error it gets back on an operation for the dead | |
2162 | * client. | |
2163 | */ | |
bcecf1cc MJ |
2164 | goto out; |
2165 | ||
2166 | status = nfs_ok; | |
2a4317c5 | 2167 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2168 | out: |
4dc6ec00 | 2169 | nfs4_unlock_state(); |
bcecf1cc | 2170 | return status; |
4dc6ec00 BF |
2171 | } |
2172 | ||
b37ad28b | 2173 | __be32 |
b591480b BF |
2174 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2175 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2176 | { |
a084daf5 | 2177 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2178 | nfs4_verifier clverifier = setclid->se_verf; |
2179 | unsigned int strhashval; | |
28ce6054 | 2180 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2181 | __be32 status; |
a55370a3 | 2182 | char dname[HEXDIR_LEN]; |
1da177e4 | 2183 | |
a55370a3 N |
2184 | status = nfs4_make_rec_clidname(dname, &clname); |
2185 | if (status) | |
73aea4ec | 2186 | return status; |
a55370a3 | 2187 | |
a55370a3 | 2188 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2189 | |
63db4632 | 2190 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2191 | nfs4_lock_state(); |
e203d506 | 2192 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2193 | if (conf) { |
63db4632 | 2194 | /* case 0: */ |
1da177e4 | 2195 | status = nfserr_clid_inuse; |
e203d506 BF |
2196 | if (clp_used_exchangeid(conf)) |
2197 | goto out; | |
026722c2 | 2198 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2199 | char addr_str[INET6_ADDRSTRLEN]; |
2200 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2201 | sizeof(addr_str)); | |
2202 | dprintk("NFSD: setclientid: string in use by client " | |
2203 | "at %s\n", addr_str); | |
1da177e4 LT |
2204 | goto out; |
2205 | } | |
1da177e4 | 2206 | } |
e203d506 | 2207 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
8f930711 BF |
2208 | if (unconf) |
2209 | expire_client(unconf); | |
3e772463 | 2210 | status = nfserr_jukebox; |
8f930711 BF |
2211 | new = create_client(clname, dname, rqstp, &clverifier); |
2212 | if (new == NULL) | |
2213 | goto out; | |
34b232bb | 2214 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2215 | /* case 1: probable callback update */ |
1da177e4 | 2216 | copy_clid(new, conf); |
34b232bb | 2217 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
1da177e4 | 2218 | gen_clid(new); |
8323c3b2 | 2219 | new->cl_minorversion = 0; |
6f3d772f | 2220 | gen_callback(new, setclid, rqstp); |
c175b83c | 2221 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2222 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2223 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2224 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2225 | status = nfs_ok; | |
2226 | out: | |
2227 | nfs4_unlock_state(); | |
2228 | return status; | |
2229 | } | |
2230 | ||
2231 | ||
b37ad28b | 2232 | __be32 |
b591480b BF |
2233 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2234 | struct nfsd4_compound_state *cstate, | |
2235 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2236 | { |
21ab45a4 | 2237 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2238 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2239 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2240 | __be32 status; |
2c142baa | 2241 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2242 | |
2c142baa | 2243 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2244 | return nfserr_stale_clientid; |
1da177e4 | 2245 | nfs4_lock_state(); |
21ab45a4 | 2246 | |
d15c077e BF |
2247 | conf = find_confirmed_client(clid, false); |
2248 | unconf = find_unconfirmed_client(clid, false); | |
a186e767 | 2249 | /* |
8695b90a BF |
2250 | * We try hard to give out unique clientid's, so if we get an |
2251 | * attempt to confirm the same clientid with a different cred, | |
2252 | * there's a bug somewhere. Let's charitably assume it's our | |
2253 | * bug. | |
a186e767 | 2254 | */ |
8695b90a BF |
2255 | status = nfserr_serverfault; |
2256 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2257 | goto out; | |
2258 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2259 | goto out; | |
63db4632 | 2260 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2261 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2262 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2263 | status = nfs_ok; |
90d700b7 BF |
2264 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2265 | status = nfserr_stale_clientid; | |
2266 | goto out; | |
2267 | } | |
2268 | status = nfs_ok; | |
2269 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2270 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2271 | nfsd4_probe_callback(conf); | |
2272 | expire_client(unconf); | |
90d700b7 | 2273 | } else { /* case 3: normal case; new or rebooted client */ |
8695b90a | 2274 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); |
1a69c179 | 2275 | |
8695b90a BF |
2276 | conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); |
2277 | if (conf) { | |
2278 | nfsd4_client_record_remove(conf); | |
2279 | expire_client(conf); | |
1da177e4 | 2280 | } |
8695b90a | 2281 | move_to_confirmed(unconf); |
f3d03b92 | 2282 | nfsd4_probe_callback(unconf); |
08e8987c | 2283 | } |
1da177e4 | 2284 | out: |
1da177e4 LT |
2285 | nfs4_unlock_state(); |
2286 | return status; | |
2287 | } | |
2288 | ||
32513b40 BF |
2289 | static struct nfs4_file *nfsd4_alloc_file(void) |
2290 | { | |
2291 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2292 | } | |
2293 | ||
1da177e4 | 2294 | /* OPEN Share state helper functions */ |
32513b40 | 2295 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2296 | { |
1da177e4 LT |
2297 | unsigned int hashval = file_hashval(ino); |
2298 | ||
32513b40 BF |
2299 | atomic_set(&fp->fi_ref, 1); |
2300 | INIT_LIST_HEAD(&fp->fi_hash); | |
2301 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2302 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2303 | fp->fi_inode = igrab(ino); | |
2304 | fp->fi_had_conflict = false; | |
2305 | fp->fi_lease = NULL; | |
2306 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2307 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2308 | spin_lock(&recall_lock); | |
2309 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2310 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2311 | } |
2312 | ||
e60d4398 | 2313 | static void |
e18b890b | 2314 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2315 | { |
e60d4398 N |
2316 | if (*slab == NULL) |
2317 | return; | |
1a1d92c1 | 2318 | kmem_cache_destroy(*slab); |
e60d4398 | 2319 | *slab = NULL; |
1da177e4 LT |
2320 | } |
2321 | ||
e8ff2a84 | 2322 | void |
1da177e4 LT |
2323 | nfsd4_free_slabs(void) |
2324 | { | |
fe0750e5 BF |
2325 | nfsd4_free_slab(&openowner_slab); |
2326 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2327 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2328 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2329 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2330 | } |
1da177e4 | 2331 | |
72083396 | 2332 | int |
e60d4398 N |
2333 | nfsd4_init_slabs(void) |
2334 | { | |
fe0750e5 BF |
2335 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2336 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2337 | if (openowner_slab == NULL) | |
2338 | goto out_nomem; | |
2339 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2340 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2341 | if (lockowner_slab == NULL) | |
e60d4398 N |
2342 | goto out_nomem; |
2343 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2344 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2345 | if (file_slab == NULL) |
2346 | goto out_nomem; | |
5ac049ac | 2347 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2348 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2349 | if (stateid_slab == NULL) |
2350 | goto out_nomem; | |
5b2d21c1 | 2351 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2352 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2353 | if (deleg_slab == NULL) |
2354 | goto out_nomem; | |
e60d4398 N |
2355 | return 0; |
2356 | out_nomem: | |
2357 | nfsd4_free_slabs(); | |
2358 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2359 | return -ENOMEM; | |
1da177e4 LT |
2360 | } |
2361 | ||
fe0750e5 BF |
2362 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2363 | { | |
2364 | kfree(oo->oo_owner.so_owner.data); | |
2365 | kmem_cache_free(openowner_slab, oo); | |
2366 | } | |
2367 | ||
2368 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2369 | { |
fe0750e5 BF |
2370 | kfree(lo->lo_owner.so_owner.data); |
2371 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2372 | } |
2373 | ||
ff194bd9 | 2374 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2375 | { |
ff194bd9 BF |
2376 | rp->rp_status = nfserr_serverfault; |
2377 | rp->rp_buflen = 0; | |
2378 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2379 | } |
2380 | ||
fe0750e5 | 2381 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2382 | { |
1da177e4 | 2383 | struct nfs4_stateowner *sop; |
1da177e4 | 2384 | |
fe0750e5 | 2385 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2386 | if (!sop) |
2387 | return NULL; | |
2388 | ||
2389 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2390 | if (!sop->so_owner.data) { | |
fe0750e5 | 2391 | kmem_cache_free(slab, sop); |
1da177e4 | 2392 | return NULL; |
ff194bd9 BF |
2393 | } |
2394 | sop->so_owner.len = owner->len; | |
2395 | ||
ea1da636 | 2396 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2397 | sop->so_client = clp; |
2398 | init_nfs4_replay(&sop->so_replay); | |
2399 | return sop; | |
2400 | } | |
2401 | ||
fe0750e5 | 2402 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2403 | { |
16bfdaaf | 2404 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2405 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2406 | } |
2407 | ||
fe0750e5 | 2408 | static struct nfs4_openowner * |
ff194bd9 | 2409 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2410 | struct nfs4_openowner *oo; |
ff194bd9 | 2411 | |
fe0750e5 BF |
2412 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2413 | if (!oo) | |
ff194bd9 | 2414 | return NULL; |
fe0750e5 BF |
2415 | oo->oo_owner.so_is_open_owner = 1; |
2416 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2417 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2418 | oo->oo_time = 0; |
38c387b5 | 2419 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2420 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2421 | hash_openowner(oo, clp, strhashval); | |
2422 | return oo; | |
1da177e4 LT |
2423 | } |
2424 | ||
996e0938 | 2425 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2426 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2427 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2428 | |
996e0938 | 2429 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2430 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2431 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2432 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2433 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2434 | get_nfs4_file(fp); |
1da177e4 | 2435 | stp->st_file = fp; |
1da177e4 LT |
2436 | stp->st_access_bmap = 0; |
2437 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2438 | set_access(open->op_share_access, stp); |
ce0fc43c | 2439 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2440 | stp->st_openstp = NULL; |
1da177e4 LT |
2441 | } |
2442 | ||
fd39ca9a | 2443 | static void |
fe0750e5 | 2444 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2445 | { |
fe0750e5 | 2446 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2447 | |
fe0750e5 BF |
2448 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2449 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2450 | } |
2451 | ||
1da177e4 | 2452 | static int |
599e0a22 BF |
2453 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2454 | clientid_t *clid) | |
2455 | { | |
2456 | return (sop->so_owner.len == owner->len) && | |
2457 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2458 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2459 | } |
2460 | ||
fe0750e5 | 2461 | static struct nfs4_openowner * |
d15c077e | 2462 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) |
1da177e4 | 2463 | { |
a50d2ad1 BF |
2464 | struct nfs4_stateowner *so; |
2465 | struct nfs4_openowner *oo; | |
d15c077e | 2466 | struct nfs4_client *clp; |
1da177e4 | 2467 | |
16bfdaaf BF |
2468 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2469 | if (!so->so_is_open_owner) | |
2470 | continue; | |
a50d2ad1 BF |
2471 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2472 | oo = openowner(so); | |
d15c077e BF |
2473 | clp = oo->oo_owner.so_client; |
2474 | if ((bool)clp->cl_minorversion != sessions) | |
2475 | return NULL; | |
a50d2ad1 BF |
2476 | renew_client(oo->oo_owner.so_client); |
2477 | return oo; | |
2478 | } | |
1da177e4 LT |
2479 | } |
2480 | return NULL; | |
2481 | } | |
2482 | ||
2483 | /* search file_hashtbl[] for file */ | |
2484 | static struct nfs4_file * | |
2485 | find_file(struct inode *ino) | |
2486 | { | |
2487 | unsigned int hashval = file_hashval(ino); | |
2488 | struct nfs4_file *fp; | |
2489 | ||
8b671b80 | 2490 | spin_lock(&recall_lock); |
1da177e4 | 2491 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2492 | if (fp->fi_inode == ino) { |
2493 | get_nfs4_file(fp); | |
8b671b80 | 2494 | spin_unlock(&recall_lock); |
1da177e4 | 2495 | return fp; |
13cd2184 | 2496 | } |
1da177e4 | 2497 | } |
8b671b80 | 2498 | spin_unlock(&recall_lock); |
1da177e4 LT |
2499 | return NULL; |
2500 | } | |
2501 | ||
1da177e4 LT |
2502 | /* |
2503 | * Called to check deny when READ with all zero stateid or | |
2504 | * WRITE with all zero or all one stateid | |
2505 | */ | |
b37ad28b | 2506 | static __be32 |
1da177e4 LT |
2507 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2508 | { | |
2509 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2510 | struct nfs4_file *fp; | |
dcef0413 | 2511 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2512 | __be32 ret; |
1da177e4 LT |
2513 | |
2514 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2515 | ||
2516 | fp = find_file(ino); | |
13cd2184 N |
2517 | if (!fp) |
2518 | return nfs_ok; | |
b700949b | 2519 | ret = nfserr_locked; |
1da177e4 | 2520 | /* Search for conflicting share reservations */ |
13cd2184 | 2521 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2522 | if (test_deny(deny_type, stp) || |
2523 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2524 | goto out; |
1da177e4 | 2525 | } |
13cd2184 N |
2526 | ret = nfs_ok; |
2527 | out: | |
2528 | put_nfs4_file(fp); | |
2529 | return ret; | |
1da177e4 LT |
2530 | } |
2531 | ||
6b57d9c8 | 2532 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2533 | { |
1da177e4 LT |
2534 | /* We're assuming the state code never drops its reference |
2535 | * without first removing the lease. Since we're in this lease | |
2536 | * callback (and since the lease code is serialized by the kernel | |
2537 | * lock) we know the server hasn't removed the lease yet, we know | |
2538 | * it's safe to take a reference: */ | |
2539 | atomic_inc(&dp->dl_count); | |
2540 | ||
1da177e4 | 2541 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2542 | |
460781b5 | 2543 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2544 | dp->dl_time = get_seconds(); |
2545 | ||
6b57d9c8 BF |
2546 | nfsd4_cb_recall(dp); |
2547 | } | |
2548 | ||
acfdf5c3 | 2549 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2550 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2551 | { | |
acfdf5c3 BF |
2552 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2553 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2554 | |
acfdf5c3 BF |
2555 | BUG_ON(!fp); |
2556 | /* We assume break_lease is only called once per lease: */ | |
2557 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2558 | /* |
2559 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2560 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2561 | * in time: |
0272e1fd BF |
2562 | */ |
2563 | fl->fl_break_time = 0; | |
1da177e4 | 2564 | |
5d926e8c | 2565 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2566 | fp->fi_had_conflict = true; |
2567 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2568 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2569 | spin_unlock(&recall_lock); |
1da177e4 LT |
2570 | } |
2571 | ||
1da177e4 LT |
2572 | static |
2573 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2574 | { | |
2575 | if (arg & F_UNLCK) | |
2576 | return lease_modify(onlist, arg); | |
2577 | else | |
2578 | return -EAGAIN; | |
2579 | } | |
2580 | ||
7b021967 | 2581 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2582 | .lm_break = nfsd_break_deleg_cb, |
2583 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2584 | }; |
2585 | ||
7a8711c9 BF |
2586 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2587 | { | |
2588 | if (nfsd4_has_session(cstate)) | |
2589 | return nfs_ok; | |
2590 | if (seqid == so->so_seqid - 1) | |
2591 | return nfserr_replay_me; | |
2592 | if (seqid == so->so_seqid) | |
2593 | return nfs_ok; | |
2594 | return nfserr_bad_seqid; | |
2595 | } | |
1da177e4 | 2596 | |
b37ad28b | 2597 | __be32 |
6668958f AA |
2598 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2599 | struct nfsd4_open *open) | |
1da177e4 | 2600 | { |
1da177e4 LT |
2601 | clientid_t *clientid = &open->op_clientid; |
2602 | struct nfs4_client *clp = NULL; | |
2603 | unsigned int strhashval; | |
fe0750e5 | 2604 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2605 | __be32 status; |
2c142baa | 2606 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2607 | |
2c142baa | 2608 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2609 | return nfserr_stale_clientid; |
32513b40 BF |
2610 | /* |
2611 | * In case we need it later, after we've already created the | |
2612 | * file and don't want to risk a further failure: | |
2613 | */ | |
2614 | open->op_file = nfsd4_alloc_file(); | |
2615 | if (open->op_file == NULL) | |
2616 | return nfserr_jukebox; | |
1da177e4 | 2617 | |
16bfdaaf | 2618 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
d15c077e | 2619 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion); |
fe0750e5 BF |
2620 | open->op_openowner = oo; |
2621 | if (!oo) { | |
d15c077e | 2622 | clp = find_confirmed_client(clientid, cstate->minorversion); |
1da177e4 | 2623 | if (clp == NULL) |
0f442aa2 | 2624 | return nfserr_expired; |
bcf130f9 | 2625 | goto new_owner; |
1da177e4 | 2626 | } |
dad1c067 | 2627 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2628 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2629 | clp = oo->oo_owner.so_client; |
2630 | release_openowner(oo); | |
2631 | open->op_openowner = NULL; | |
bcf130f9 | 2632 | goto new_owner; |
0f442aa2 | 2633 | } |
4cdc951b BF |
2634 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2635 | if (status) | |
2636 | return status; | |
2637 | clp = oo->oo_owner.so_client; | |
2638 | goto alloc_stateid; | |
bcf130f9 BF |
2639 | new_owner: |
2640 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2641 | if (oo == NULL) | |
2642 | return nfserr_jukebox; | |
2643 | open->op_openowner = oo; | |
4cdc951b BF |
2644 | alloc_stateid: |
2645 | open->op_stp = nfs4_alloc_stateid(clp); | |
2646 | if (!open->op_stp) | |
2647 | return nfserr_jukebox; | |
0f442aa2 | 2648 | return nfs_ok; |
1da177e4 LT |
2649 | } |
2650 | ||
b37ad28b | 2651 | static inline __be32 |
4a6e43e6 N |
2652 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2653 | { | |
2654 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2655 | return nfserr_openmode; | |
2656 | else | |
2657 | return nfs_ok; | |
2658 | } | |
2659 | ||
f459e453 | 2660 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2661 | { |
f459e453 | 2662 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2663 | } |
2664 | ||
38c2f4b1 | 2665 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2666 | { |
f459e453 | 2667 | struct nfs4_stid *ret; |
24a0111e | 2668 | |
38c2f4b1 | 2669 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2670 | if (!ret) |
2671 | return NULL; | |
2672 | return delegstateid(ret); | |
24a0111e BF |
2673 | } |
2674 | ||
8b289b2c BF |
2675 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2676 | { | |
2677 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2678 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2679 | } | |
2680 | ||
b37ad28b | 2681 | static __be32 |
38c2f4b1 | 2682 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2683 | struct nfs4_delegation **dp) |
2684 | { | |
2685 | int flags; | |
b37ad28b | 2686 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2687 | |
38c2f4b1 | 2688 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2689 | if (*dp == NULL) |
c44c5eeb | 2690 | goto out; |
24a0111e | 2691 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2692 | status = nfs4_check_delegmode(*dp, flags); |
2693 | if (status) | |
2694 | *dp = NULL; | |
c44c5eeb | 2695 | out: |
8b289b2c | 2696 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2697 | return nfs_ok; |
2698 | if (status) | |
2699 | return status; | |
dad1c067 | 2700 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2701 | return nfs_ok; |
567d9829 N |
2702 | } |
2703 | ||
b37ad28b | 2704 | static __be32 |
dcef0413 | 2705 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2706 | { |
dcef0413 | 2707 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2708 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2709 | |
8beefa24 | 2710 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2711 | /* ignore lock owners */ |
2712 | if (local->st_stateowner->so_is_open_owner == 0) | |
2713 | continue; | |
2714 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2715 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2716 | *stpp = local; |
2717 | /* check for conflicting share reservations */ | |
2718 | if (!test_share(local, open)) | |
77eaae8d | 2719 | return nfserr_share_denied; |
1da177e4 | 2720 | } |
77eaae8d | 2721 | return nfs_ok; |
1da177e4 LT |
2722 | } |
2723 | ||
21fb4016 BF |
2724 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2725 | { | |
2726 | int flags = 0; | |
2727 | ||
2728 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2729 | flags |= NFSD_MAY_READ; | |
2730 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2731 | flags |= NFSD_MAY_WRITE; | |
2732 | return flags; | |
2733 | } | |
2734 | ||
0c12eaff CB |
2735 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2736 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2737 | { |
2738 | __be32 status; | |
0c12eaff CB |
2739 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2740 | int access = nfs4_access_to_access(open->op_share_access); | |
2741 | ||
f9d7562f BF |
2742 | if (!fp->fi_fds[oflag]) { |
2743 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2744 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2745 | if (status) |
2746 | return status; | |
2747 | } | |
2748 | nfs4_file_get_access(fp, oflag); | |
2749 | ||
2750 | return nfs_ok; | |
2751 | } | |
2752 | ||
b37ad28b | 2753 | static inline __be32 |
1da177e4 LT |
2754 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2755 | struct nfsd4_open *open) | |
2756 | { | |
2757 | struct iattr iattr = { | |
2758 | .ia_valid = ATTR_SIZE, | |
2759 | .ia_size = 0, | |
2760 | }; | |
2761 | if (!open->op_truncate) | |
2762 | return 0; | |
2763 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2764 | return nfserr_inval; |
1da177e4 LT |
2765 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2766 | } | |
2767 | ||
b37ad28b | 2768 | static __be32 |
dcef0413 | 2769 | 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 | 2770 | { |
b6d2f1ca | 2771 | u32 op_share_access = open->op_share_access; |
7d947842 | 2772 | bool new_access; |
b37ad28b | 2773 | __be32 status; |
1da177e4 | 2774 | |
82c5ff1b | 2775 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2776 | if (new_access) { |
0c12eaff | 2777 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2778 | if (status) |
2779 | return status; | |
6c26d08f | 2780 | } |
1da177e4 LT |
2781 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2782 | if (status) { | |
f9d7562f | 2783 | if (new_access) { |
f197c271 | 2784 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2785 | nfs4_file_put_access(fp, oflag); |
2786 | } | |
1da177e4 LT |
2787 | return status; |
2788 | } | |
2789 | /* remember the open */ | |
82c5ff1b | 2790 | set_access(op_share_access, stp); |
ce0fc43c | 2791 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2792 | |
2793 | return nfs_ok; | |
2794 | } | |
2795 | ||
2796 | ||
1da177e4 | 2797 | static void |
1255a8f3 | 2798 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2799 | { |
dad1c067 | 2800 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2801 | } |
2802 | ||
14a24e99 BF |
2803 | /* Should we give out recallable state?: */ |
2804 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2805 | { | |
2806 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2807 | return true; | |
2808 | /* | |
2809 | * In the sessions case, since we don't have to establish a | |
2810 | * separate connection for callbacks, we assume it's OK | |
2811 | * until we hear otherwise: | |
2812 | */ | |
2813 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2814 | } | |
2815 | ||
22d38c4c BF |
2816 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2817 | { | |
2818 | struct file_lock *fl; | |
2819 | ||
2820 | fl = locks_alloc_lock(); | |
2821 | if (!fl) | |
2822 | return NULL; | |
2823 | locks_init_lock(fl); | |
2824 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2825 | fl->fl_flags = FL_LEASE; | |
2826 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2827 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2828 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2829 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2830 | return fl; |
2831 | } | |
2832 | ||
edab9782 BF |
2833 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2834 | { | |
acfdf5c3 | 2835 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2836 | struct file_lock *fl; |
2837 | int status; | |
2838 | ||
2839 | fl = nfs4_alloc_init_lease(dp, flag); | |
2840 | if (!fl) | |
2841 | return -ENOMEM; | |
acfdf5c3 | 2842 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2843 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2844 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2845 | if (status) { |
acfdf5c3 | 2846 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2847 | locks_free_lock(fl); |
2848 | return -ENOMEM; | |
2849 | } | |
acfdf5c3 BF |
2850 | fp->fi_lease = fl; |
2851 | fp->fi_deleg_file = fl->fl_file; | |
2852 | get_file(fp->fi_deleg_file); | |
2853 | atomic_set(&fp->fi_delegees, 1); | |
2854 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2855 | return 0; | |
2856 | } | |
2857 | ||
2858 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2859 | { | |
2860 | struct nfs4_file *fp = dp->dl_file; | |
2861 | ||
2862 | if (!fp->fi_lease) | |
2863 | return nfs4_setlease(dp, flag); | |
2864 | spin_lock(&recall_lock); | |
2865 | if (fp->fi_had_conflict) { | |
2866 | spin_unlock(&recall_lock); | |
2867 | return -EAGAIN; | |
2868 | } | |
2869 | atomic_inc(&fp->fi_delegees); | |
2870 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2871 | spin_unlock(&recall_lock); | |
2a74aba7 | 2872 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2873 | return 0; |
2874 | } | |
2875 | ||
4aa8913c BH |
2876 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2877 | { | |
2878 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2879 | if (status == -EAGAIN) | |
2880 | open->op_why_no_deleg = WND4_CONTENTION; | |
2881 | else { | |
2882 | open->op_why_no_deleg = WND4_RESOURCE; | |
2883 | switch (open->op_deleg_want) { | |
2884 | case NFS4_SHARE_WANT_READ_DELEG: | |
2885 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2886 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2887 | break; | |
2888 | case NFS4_SHARE_WANT_CANCEL: | |
2889 | open->op_why_no_deleg = WND4_CANCELLED; | |
2890 | break; | |
2891 | case NFS4_SHARE_WANT_NO_DELEG: | |
2892 | BUG(); /* not supposed to get here */ | |
2893 | } | |
2894 | } | |
2895 | } | |
2896 | ||
1da177e4 LT |
2897 | /* |
2898 | * Attempt to hand out a delegation. | |
2899 | */ | |
2900 | static void | |
5ccb0066 SK |
2901 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2902 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2903 | { |
2904 | struct nfs4_delegation *dp; | |
fe0750e5 | 2905 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2906 | int cb_up; |
d24433cd | 2907 | int status = 0, flag = 0; |
1da177e4 | 2908 | |
fe0750e5 | 2909 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2910 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2911 | open->op_recall = 0; |
2912 | switch (open->op_claim_type) { | |
2913 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2914 | if (!cb_up) |
7b190fec N |
2915 | open->op_recall = 1; |
2916 | flag = open->op_delegate_type; | |
2917 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2918 | goto out; | |
2919 | break; | |
2920 | case NFS4_OPEN_CLAIM_NULL: | |
2921 | /* Let's not give out any delegations till everyone's | |
2922 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2923 | if (locks_in_grace(net)) |
7b190fec | 2924 | goto out; |
dad1c067 | 2925 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2926 | goto out; |
2927 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2928 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2929 | else | |
2930 | flag = NFS4_OPEN_DELEGATE_READ; | |
2931 | break; | |
2932 | default: | |
2933 | goto out; | |
2934 | } | |
1da177e4 | 2935 | |
fe0750e5 | 2936 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2937 | if (dp == NULL) |
2938 | goto out_no_deleg; | |
acfdf5c3 | 2939 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2940 | if (status) |
dd239cc0 | 2941 | goto out_free; |
1da177e4 | 2942 | |
d5477a8d | 2943 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2944 | |
8c10cbdb | 2945 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2946 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2947 | out: |
2948 | open->op_delegate_type = flag; | |
d24433cd BH |
2949 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2950 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2951 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2952 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2953 | ||
4aa8913c BH |
2954 | /* 4.1 client asking for a delegation? */ |
2955 | if (open->op_deleg_want) | |
2956 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2957 | } |
dd239cc0 BF |
2958 | return; |
2959 | out_free: | |
acfdf5c3 | 2960 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2961 | out_no_deleg: |
2962 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2963 | goto out; | |
1da177e4 LT |
2964 | } |
2965 | ||
e27f49c3 BH |
2966 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2967 | struct nfs4_delegation *dp) | |
2968 | { | |
2969 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2970 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2971 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2972 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2973 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2974 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2975 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2976 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2977 | } | |
2978 | /* Otherwise the client must be confused wanting a delegation | |
2979 | * it already has, therefore we don't return | |
2980 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
2981 | */ | |
2982 | } | |
2983 | ||
1da177e4 LT |
2984 | /* |
2985 | * called with nfs4_lock_state() held. | |
2986 | */ | |
b37ad28b | 2987 | __be32 |
1da177e4 LT |
2988 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2989 | { | |
6668958f | 2990 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2991 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2992 | struct nfs4_file *fp = NULL; |
2993 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2994 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2995 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2996 | __be32 status; |
1da177e4 | 2997 | |
1da177e4 LT |
2998 | /* |
2999 | * Lookup file; if found, lookup stateid and check open request, | |
3000 | * and check for delegations in the process of being recalled. | |
3001 | * If not found, create the nfs4_file struct | |
3002 | */ | |
3003 | fp = find_file(ino); | |
3004 | if (fp) { | |
3005 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3006 | goto out; | |
38c2f4b1 | 3007 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3008 | if (status) |
3009 | goto out; | |
1da177e4 | 3010 | } else { |
c44c5eeb | 3011 | status = nfserr_bad_stateid; |
8b289b2c | 3012 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3013 | goto out; |
3e772463 | 3014 | status = nfserr_jukebox; |
32513b40 BF |
3015 | fp = open->op_file; |
3016 | open->op_file = NULL; | |
3017 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3018 | } |
3019 | ||
3020 | /* | |
3021 | * OPEN the file, or upgrade an existing OPEN. | |
3022 | * If truncate fails, the OPEN fails. | |
3023 | */ | |
3024 | if (stp) { | |
3025 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3026 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3027 | if (status) |
3028 | goto out; | |
3029 | } else { | |
4cdc951b | 3030 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3031 | if (status) |
3032 | goto out; | |
3033 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3034 | if (status) |
1da177e4 | 3035 | goto out; |
4cdc951b BF |
3036 | stp = open->op_stp; |
3037 | open->op_stp = NULL; | |
996e0938 | 3038 | init_open_stateid(stp, fp, open); |
1da177e4 | 3039 | } |
dcef0413 BF |
3040 | update_stateid(&stp->st_stid.sc_stateid); |
3041 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3042 | |
d24433cd | 3043 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3044 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3045 | |
d24433cd BH |
3046 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3047 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3048 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3049 | goto nodeleg; | |
3050 | } | |
3051 | } | |
3052 | ||
1da177e4 LT |
3053 | /* |
3054 | * Attempt to hand out a delegation. No error return, because the | |
3055 | * OPEN succeeds even if we fail. | |
3056 | */ | |
5ccb0066 | 3057 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3058 | nodeleg: |
1da177e4 LT |
3059 | status = nfs_ok; |
3060 | ||
8c10cbdb | 3061 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3062 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3063 | out: |
d24433cd BH |
3064 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3065 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3066 | open->op_deleg_want) |
3067 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3068 | |
13cd2184 N |
3069 | if (fp) |
3070 | put_nfs4_file(fp); | |
37515177 | 3071 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3072 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3073 | /* |
3074 | * To finish the open response, we just need to set the rflags. | |
3075 | */ | |
3076 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3077 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3078 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3079 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3080 | ||
3081 | return status; | |
3082 | } | |
3083 | ||
d29b20cd BF |
3084 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3085 | { | |
3086 | if (open->op_openowner) { | |
3087 | struct nfs4_openowner *oo = open->op_openowner; | |
3088 | ||
3089 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3090 | list_del_init(&oo->oo_close_lru); | |
3091 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3092 | if (status) { | |
3093 | release_openowner(oo); | |
3094 | open->op_openowner = NULL; | |
3095 | } else | |
3096 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3097 | } | |
3098 | } | |
32513b40 BF |
3099 | if (open->op_file) |
3100 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3101 | if (open->op_stp) |
ef79859e | 3102 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3103 | } |
3104 | ||
b37ad28b | 3105 | __be32 |
b591480b BF |
3106 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3107 | clientid_t *clid) | |
1da177e4 LT |
3108 | { |
3109 | struct nfs4_client *clp; | |
b37ad28b | 3110 | __be32 status; |
2c142baa | 3111 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
3112 | |
3113 | nfs4_lock_state(); | |
3114 | dprintk("process_renew(%08x/%08x): starting\n", | |
3115 | clid->cl_boot, clid->cl_id); | |
3116 | status = nfserr_stale_clientid; | |
2c142baa | 3117 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3118 | goto out; |
d15c077e | 3119 | clp = find_confirmed_client(clid, cstate->minorversion); |
1da177e4 LT |
3120 | status = nfserr_expired; |
3121 | if (clp == NULL) { | |
3122 | /* We assume the client took too long to RENEW. */ | |
3123 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3124 | goto out; | |
3125 | } | |
1da177e4 | 3126 | status = nfserr_cb_path_down; |
ea1da636 | 3127 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3128 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3129 | goto out; |
3130 | status = nfs_ok; | |
3131 | out: | |
3132 | nfs4_unlock_state(); | |
3133 | return status; | |
3134 | } | |
3135 | ||
a76b4319 | 3136 | static void |
5e1533c7 | 3137 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3138 | { |
5e1533c7 SK |
3139 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3140 | ||
33dcc481 | 3141 | /* do nothing if grace period already ended */ |
a51c84ed | 3142 | if (nn->grace_ended) |
33dcc481 JL |
3143 | return; |
3144 | ||
a76b4319 | 3145 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3146 | nn->grace_ended = true; |
2c142baa | 3147 | nfsd4_record_grace_done(net, nn->boot_time); |
5e1533c7 | 3148 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3149 | /* |
3150 | * Now that every NFSv4 client has had the chance to recover and | |
3151 | * to see the (possibly new, possibly shorter) lease time, we | |
3152 | * can safely set the next grace time to the current lease time: | |
3153 | */ | |
3154 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3155 | } |
3156 | ||
fd39ca9a | 3157 | static time_t |
1da177e4 LT |
3158 | nfs4_laundromat(void) |
3159 | { | |
3160 | struct nfs4_client *clp; | |
fe0750e5 | 3161 | struct nfs4_openowner *oo; |
1da177e4 LT |
3162 | struct nfs4_delegation *dp; |
3163 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3164 | time_t cutoff = get_seconds() - nfsd4_lease; |
3165 | time_t t, clientid_val = nfsd4_lease; | |
3166 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3167 | |
3168 | nfs4_lock_state(); | |
3169 | ||
3170 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3171 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3172 | INIT_LIST_HEAD(&reaplist); |
3173 | spin_lock(&client_lock); | |
1da177e4 LT |
3174 | list_for_each_safe(pos, next, &client_lru) { |
3175 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3176 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3177 | t = clp->cl_time - cutoff; | |
3178 | if (clientid_val > t) | |
3179 | clientid_val = t; | |
3180 | break; | |
3181 | } | |
d7682988 BH |
3182 | if (atomic_read(&clp->cl_refcount)) { |
3183 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3184 | clp->cl_clientid.cl_id); | |
3185 | continue; | |
3186 | } | |
3187 | unhash_client_locked(clp); | |
3188 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3189 | } |
3190 | spin_unlock(&client_lock); | |
3191 | list_for_each_safe(pos, next, &reaplist) { | |
3192 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3193 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3194 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3195 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3196 | expire_client(clp); |
3197 | } | |
1da177e4 LT |
3198 | spin_lock(&recall_lock); |
3199 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3200 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3201 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3202 | u = dp->dl_time - cutoff; | |
3203 | if (test_val > u) | |
3204 | test_val = u; | |
3205 | break; | |
3206 | } | |
1da177e4 LT |
3207 | list_move(&dp->dl_recall_lru, &reaplist); |
3208 | } | |
3209 | spin_unlock(&recall_lock); | |
3210 | list_for_each_safe(pos, next, &reaplist) { | |
3211 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3212 | unhash_delegation(dp); |
3213 | } | |
cf07d2ea | 3214 | test_val = nfsd4_lease; |
1da177e4 | 3215 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3216 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3217 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3218 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3219 | if (test_val > u) |
3220 | test_val = u; | |
3221 | break; | |
3222 | } | |
fe0750e5 | 3223 | release_openowner(oo); |
1da177e4 LT |
3224 | } |
3225 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3226 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3227 | nfs4_unlock_state(); | |
3228 | return clientid_val; | |
3229 | } | |
3230 | ||
a254b246 HH |
3231 | static struct workqueue_struct *laundry_wq; |
3232 | static void laundromat_main(struct work_struct *); | |
3233 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3234 | ||
3235 | static void | |
c4028958 | 3236 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3237 | { |
3238 | time_t t; | |
3239 | ||
3240 | t = nfs4_laundromat(); | |
3241 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3242 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3243 | } |
3244 | ||
f7a4d872 | 3245 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3246 | { |
f7a4d872 BF |
3247 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3248 | return nfserr_bad_stateid; | |
3249 | return nfs_ok; | |
1da177e4 LT |
3250 | } |
3251 | ||
3252 | static int | |
2c142baa | 3253 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3254 | { |
2c142baa | 3255 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3256 | return 0; |
3257 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3258 | STATEID_VAL(stateid)); |
e4e83ea4 | 3259 | return 1; |
1da177e4 LT |
3260 | } |
3261 | ||
3262 | static inline int | |
82c5ff1b | 3263 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3264 | { |
82c5ff1b JL |
3265 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3266 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3267 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3268 | } |
3269 | ||
3270 | static inline int | |
82c5ff1b | 3271 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3272 | { |
82c5ff1b JL |
3273 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3274 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3275 | } |
3276 | ||
3277 | static | |
dcef0413 | 3278 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3279 | { |
b37ad28b | 3280 | __be32 status = nfserr_openmode; |
1da177e4 | 3281 | |
02921914 BF |
3282 | /* For lock stateid's, we test the parent open, not the lock: */ |
3283 | if (stp->st_openstp) | |
3284 | stp = stp->st_openstp; | |
82c5ff1b | 3285 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3286 | goto out; |
82c5ff1b | 3287 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3288 | goto out; |
3289 | status = nfs_ok; | |
3290 | out: | |
3291 | return status; | |
3292 | } | |
3293 | ||
b37ad28b | 3294 | static inline __be32 |
5ccb0066 | 3295 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3296 | { |
203a8c8e | 3297 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3298 | return nfs_ok; |
5ccb0066 | 3299 | else if (locks_in_grace(net)) { |
25985edc | 3300 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3301 | * conflicting state; so we must wait out the grace period. */ |
3302 | return nfserr_grace; | |
3303 | } else if (flags & WR_STATE) | |
3304 | return nfs4_share_conflict(current_fh, | |
3305 | NFS4_SHARE_DENY_WRITE); | |
3306 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3307 | return nfs4_share_conflict(current_fh, | |
3308 | NFS4_SHARE_DENY_READ); | |
3309 | } | |
3310 | ||
3311 | /* | |
3312 | * Allow READ/WRITE during grace period on recovered state only for files | |
3313 | * that are not able to provide mandatory locking. | |
3314 | */ | |
3315 | static inline int | |
5ccb0066 | 3316 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3317 | { |
5ccb0066 | 3318 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3319 | } |
3320 | ||
81b82965 BF |
3321 | /* Returns true iff a is later than b: */ |
3322 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3323 | { | |
3324 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3325 | } | |
3326 | ||
57b7b43b | 3327 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3328 | { |
6668958f AA |
3329 | /* |
3330 | * When sessions are used the stateid generation number is ignored | |
3331 | * when it is zero. | |
3332 | */ | |
28dde241 | 3333 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3334 | return nfs_ok; |
3335 | ||
3336 | if (in->si_generation == ref->si_generation) | |
3337 | return nfs_ok; | |
6668958f | 3338 | |
0836f587 | 3339 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3340 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3341 | return nfserr_bad_stateid; |
3342 | /* | |
81b82965 BF |
3343 | * However, we could see a stateid from the past, even from a |
3344 | * non-buggy client. For example, if the client sends a lock | |
3345 | * while some IO is outstanding, the lock may bump si_generation | |
3346 | * while the IO is still in flight. The client could avoid that | |
3347 | * situation by waiting for responses on all the IO requests, | |
3348 | * but better performance may result in retrying IO that | |
3349 | * receives an old_stateid error if requests are rarely | |
3350 | * reordered in flight: | |
0836f587 | 3351 | */ |
81b82965 | 3352 | return nfserr_old_stateid; |
0836f587 BF |
3353 | } |
3354 | ||
7df302f7 | 3355 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3356 | { |
97b7e3b6 BF |
3357 | struct nfs4_stid *s; |
3358 | struct nfs4_ol_stateid *ols; | |
3359 | __be32 status; | |
17456804 | 3360 | |
7df302f7 CL |
3361 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3362 | return nfserr_bad_stateid; | |
3363 | /* Client debugging aid. */ | |
3364 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3365 | char addr_str[INET6_ADDRSTRLEN]; | |
3366 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3367 | sizeof(addr_str)); | |
3368 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3369 | "with incorrect client ID\n", addr_str); | |
3370 | return nfserr_bad_stateid; | |
3371 | } | |
38c2f4b1 | 3372 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3373 | if (!s) |
7df302f7 | 3374 | return nfserr_bad_stateid; |
36279ac1 | 3375 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3376 | if (status) |
97b7e3b6 BF |
3377 | return status; |
3378 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3379 | return nfs_ok; | |
3380 | ols = openlockstateid(s); | |
3381 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3382 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3383 | return nfserr_bad_stateid; |
3384 | return nfs_ok; | |
17456804 BS |
3385 | } |
3386 | ||
d15c077e | 3387 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) |
38c2f4b1 BF |
3388 | { |
3389 | struct nfs4_client *cl; | |
2c142baa | 3390 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
38c2f4b1 BF |
3391 | |
3392 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3393 | return nfserr_bad_stateid; | |
2c142baa | 3394 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3395 | return nfserr_stale_stateid; |
d15c077e | 3396 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions); |
38c2f4b1 BF |
3397 | if (!cl) |
3398 | return nfserr_expired; | |
3399 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3400 | if (!*s) | |
3401 | return nfserr_bad_stateid; | |
3402 | return nfs_ok; | |
3403 | ||
3404 | } | |
3405 | ||
1da177e4 LT |
3406 | /* |
3407 | * Checks for stateid operations | |
3408 | */ | |
b37ad28b | 3409 | __be32 |
5ccb0066 | 3410 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3411 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3412 | { |
69064a27 | 3413 | struct nfs4_stid *s; |
dcef0413 | 3414 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3415 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3416 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3417 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3418 | __be32 status; |
1da177e4 | 3419 | |
1da177e4 LT |
3420 | if (filpp) |
3421 | *filpp = NULL; | |
3422 | ||
5ccb0066 | 3423 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3424 | return nfserr_grace; |
3425 | ||
3426 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3427 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3428 | |
d15c077e | 3429 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); |
38c2f4b1 BF |
3430 | if (status) |
3431 | return status; | |
69064a27 BF |
3432 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3433 | if (status) | |
3434 | goto out; | |
f7a4d872 BF |
3435 | switch (s->sc_type) { |
3436 | case NFS4_DELEG_STID: | |
69064a27 | 3437 | dp = delegstateid(s); |
dc9bf700 BF |
3438 | status = nfs4_check_delegmode(dp, flags); |
3439 | if (status) | |
3440 | goto out; | |
43b0178e | 3441 | if (filpp) { |
acfdf5c3 | 3442 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3443 | BUG_ON(!*filpp); |
3444 | } | |
f7a4d872 BF |
3445 | break; |
3446 | case NFS4_OPEN_STID: | |
3447 | case NFS4_LOCK_STID: | |
69064a27 | 3448 | stp = openlockstateid(s); |
f7a4d872 BF |
3449 | status = nfs4_check_fh(current_fh, stp); |
3450 | if (status) | |
1da177e4 | 3451 | goto out; |
fe0750e5 | 3452 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3453 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3454 | goto out; |
a4455be0 BF |
3455 | status = nfs4_check_openmode(stp, flags); |
3456 | if (status) | |
1da177e4 | 3457 | goto out; |
f9d7562f BF |
3458 | if (filpp) { |
3459 | if (flags & RD_STATE) | |
3460 | *filpp = find_readable_file(stp->st_file); | |
3461 | else | |
3462 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3463 | } |
f7a4d872 BF |
3464 | break; |
3465 | default: | |
3466 | return nfserr_bad_stateid; | |
1da177e4 LT |
3467 | } |
3468 | status = nfs_ok; | |
3469 | out: | |
3470 | return status; | |
3471 | } | |
3472 | ||
e1ca12df | 3473 | static __be32 |
dcef0413 | 3474 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3475 | { |
fe0750e5 | 3476 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3477 | return nfserr_locks_held; |
3478 | release_lock_stateid(stp); | |
3479 | return nfs_ok; | |
3480 | } | |
3481 | ||
17456804 BS |
3482 | /* |
3483 | * Test if the stateid is valid | |
3484 | */ | |
3485 | __be32 | |
3486 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3487 | struct nfsd4_test_stateid *test_stateid) | |
3488 | { | |
03cfb420 BS |
3489 | struct nfsd4_test_stateid_id *stateid; |
3490 | struct nfs4_client *cl = cstate->session->se_client; | |
3491 | ||
3492 | nfs4_lock_state(); | |
3493 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3494 | stateid->ts_id_status = |
3495 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3496 | nfs4_unlock_state(); |
3497 | ||
17456804 BS |
3498 | return nfs_ok; |
3499 | } | |
3500 | ||
e1ca12df BS |
3501 | __be32 |
3502 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3503 | struct nfsd4_free_stateid *free_stateid) | |
3504 | { | |
3505 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3506 | struct nfs4_stid *s; |
38c2f4b1 | 3507 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3508 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3509 | |
3510 | nfs4_lock_state(); | |
38c2f4b1 | 3511 | s = find_stateid(cl, stateid); |
2da1cec7 | 3512 | if (!s) |
81b82965 | 3513 | goto out; |
2da1cec7 BF |
3514 | switch (s->sc_type) { |
3515 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3516 | ret = nfserr_locks_held; |
3517 | goto out; | |
2da1cec7 BF |
3518 | case NFS4_OPEN_STID: |
3519 | case NFS4_LOCK_STID: | |
3520 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3521 | if (ret) | |
3522 | goto out; | |
3523 | if (s->sc_type == NFS4_LOCK_STID) | |
3524 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3525 | else | |
3526 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3527 | break; |
3528 | default: | |
3529 | ret = nfserr_bad_stateid; | |
e1ca12df | 3530 | } |
e1ca12df BS |
3531 | out: |
3532 | nfs4_unlock_state(); | |
3533 | return ret; | |
3534 | } | |
3535 | ||
4c4cd222 N |
3536 | static inline int |
3537 | setlkflg (int type) | |
3538 | { | |
3539 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3540 | RD_STATE : WR_STATE; | |
3541 | } | |
1da177e4 | 3542 | |
dcef0413 | 3543 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3544 | { |
3545 | struct svc_fh *current_fh = &cstate->current_fh; | |
3546 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3547 | __be32 status; | |
3548 | ||
c0a5d93e BF |
3549 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3550 | if (status) | |
3551 | return status; | |
f7a4d872 BF |
3552 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3553 | /* | |
3554 | * "Closed" stateid's exist *only* to return | |
3555 | * nfserr_replay_me from the previous step. | |
3556 | */ | |
3557 | return nfserr_bad_stateid; | |
3558 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3559 | if (status) | |
3560 | return status; | |
3561 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3562 | } |
3563 | ||
1da177e4 LT |
3564 | /* |
3565 | * Checks for sequence id mutating operations. | |
3566 | */ | |
b37ad28b | 3567 | static __be32 |
dd453dfd | 3568 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3569 | stateid_t *stateid, char typemask, |
dcef0413 | 3570 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3571 | { |
0836f587 | 3572 | __be32 status; |
38c2f4b1 | 3573 | struct nfs4_stid *s; |
1da177e4 | 3574 | |
8c10cbdb BH |
3575 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3576 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3577 | |
1da177e4 | 3578 | *stpp = NULL; |
d15c077e | 3579 | status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); |
c0a5d93e BF |
3580 | if (status) |
3581 | return status; | |
38c2f4b1 | 3582 | *stpp = openlockstateid(s); |
c0a5d93e | 3583 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3584 | |
c0a5d93e BF |
3585 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3586 | } | |
39325bd0 | 3587 | |
dcef0413 | 3588 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3589 | { |
3590 | __be32 status; | |
3591 | struct nfs4_openowner *oo; | |
1da177e4 | 3592 | |
c0a5d93e | 3593 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3594 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3595 | if (status) |
3596 | return status; | |
c0a5d93e | 3597 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3598 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3599 | return nfserr_bad_stateid; |
3a4f98bb | 3600 | return nfs_ok; |
1da177e4 LT |
3601 | } |
3602 | ||
b37ad28b | 3603 | __be32 |
ca364317 | 3604 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3605 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3606 | { |
b37ad28b | 3607 | __be32 status; |
fe0750e5 | 3608 | struct nfs4_openowner *oo; |
dcef0413 | 3609 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3610 | |
3611 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3612 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3613 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3614 | |
ca364317 | 3615 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3616 | if (status) |
3617 | return status; | |
1da177e4 LT |
3618 | |
3619 | nfs4_lock_state(); | |
3620 | ||
9072d5c6 | 3621 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3622 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3623 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3624 | if (status) |
68b66e82 | 3625 | goto out; |
fe0750e5 | 3626 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3627 | status = nfserr_bad_stateid; |
dad1c067 | 3628 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3629 | goto out; |
dad1c067 | 3630 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3631 | update_stateid(&stp->st_stid.sc_stateid); |
3632 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3633 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3634 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3635 | |
2a4317c5 | 3636 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3637 | status = nfs_ok; |
1da177e4 | 3638 | out: |
5ec094c1 BF |
3639 | if (!cstate->replay_owner) |
3640 | nfs4_unlock_state(); | |
1da177e4 LT |
3641 | return status; |
3642 | } | |
3643 | ||
6409a5a6 | 3644 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3645 | { |
82c5ff1b | 3646 | if (!test_access(access, stp)) |
6409a5a6 BF |
3647 | return; |
3648 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3649 | clear_access(access, stp); |
6409a5a6 | 3650 | } |
f197c271 | 3651 | |
6409a5a6 BF |
3652 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3653 | { | |
3654 | switch (to_access) { | |
3655 | case NFS4_SHARE_ACCESS_READ: | |
3656 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3657 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3658 | break; | |
3659 | case NFS4_SHARE_ACCESS_WRITE: | |
3660 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3661 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3662 | break; | |
3663 | case NFS4_SHARE_ACCESS_BOTH: | |
3664 | break; | |
3665 | default: | |
3666 | BUG(); | |
1da177e4 LT |
3667 | } |
3668 | } | |
3669 | ||
3670 | static void | |
ce0fc43c | 3671 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3672 | { |
3673 | int i; | |
3674 | for (i = 0; i < 4; i++) { | |
3675 | if ((i & deny) != i) | |
ce0fc43c | 3676 | clear_deny(i, stp); |
1da177e4 LT |
3677 | } |
3678 | } | |
3679 | ||
b37ad28b | 3680 | __be32 |
ca364317 BF |
3681 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3682 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3683 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3684 | { |
b37ad28b | 3685 | __be32 status; |
dcef0413 | 3686 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3687 | |
3688 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3689 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3690 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3691 | |
c30e92df | 3692 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3693 | if (od->od_deleg_want) |
3694 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3695 | od->od_deleg_want); | |
1da177e4 LT |
3696 | |
3697 | nfs4_lock_state(); | |
c0a5d93e BF |
3698 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3699 | &od->od_stateid, &stp); | |
9072d5c6 | 3700 | if (status) |
1da177e4 | 3701 | goto out; |
1da177e4 | 3702 | status = nfserr_inval; |
82c5ff1b JL |
3703 | if (!test_access(od->od_share_access, stp)) { |
3704 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3705 | stp->st_access_bmap, od->od_share_access); |
3706 | goto out; | |
3707 | } | |
ce0fc43c | 3708 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3709 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3710 | stp->st_deny_bmap, od->od_share_deny); | |
3711 | goto out; | |
3712 | } | |
6409a5a6 | 3713 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3714 | |
ce0fc43c | 3715 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3716 | |
dcef0413 BF |
3717 | update_stateid(&stp->st_stid.sc_stateid); |
3718 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3719 | status = nfs_ok; |
3720 | out: | |
5ec094c1 BF |
3721 | if (!cstate->replay_owner) |
3722 | nfs4_unlock_state(); | |
1da177e4 LT |
3723 | return status; |
3724 | } | |
3725 | ||
38c387b5 BF |
3726 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3727 | { | |
3728 | struct nfs4_openowner *oo; | |
3729 | struct nfs4_ol_stateid *s; | |
3730 | ||
3731 | if (!so->so_is_open_owner) | |
3732 | return; | |
3733 | oo = openowner(so); | |
3734 | s = oo->oo_last_closed_stid; | |
3735 | if (!s) | |
3736 | return; | |
3737 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3738 | /* Release the last_closed_stid on the next seqid bump: */ | |
3739 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3740 | return; | |
3741 | } | |
3742 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3743 | release_last_closed_stateid(oo); |
3744 | } | |
3745 | ||
3746 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3747 | { | |
3748 | unhash_open_stateid(s); | |
3749 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3750 | } |
3751 | ||
1da177e4 LT |
3752 | /* |
3753 | * nfs4_unlock_state() called after encode | |
3754 | */ | |
b37ad28b | 3755 | __be32 |
ca364317 | 3756 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3757 | struct nfsd4_close *close) |
1da177e4 | 3758 | { |
b37ad28b | 3759 | __be32 status; |
fe0750e5 | 3760 | struct nfs4_openowner *oo; |
dcef0413 | 3761 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3762 | |
3763 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3764 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3765 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3766 | |
3767 | nfs4_lock_state(); | |
f7a4d872 BF |
3768 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3769 | &close->cl_stateid, | |
3770 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3771 | &stp); | |
9072d5c6 | 3772 | if (status) |
1da177e4 | 3773 | goto out; |
fe0750e5 | 3774 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3775 | status = nfs_ok; |
dcef0413 BF |
3776 | update_stateid(&stp->st_stid.sc_stateid); |
3777 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3778 | |
f7a4d872 | 3779 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3780 | release_last_closed_stateid(oo); |
38c387b5 | 3781 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3782 | |
74dbafaf BF |
3783 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3784 | if (cstate->minorversion) { | |
3785 | release_openowner(oo); | |
3786 | cstate->replay_owner = NULL; | |
3787 | } else { | |
3788 | /* | |
3789 | * In the 4.0 case we need to keep the owners around a | |
3790 | * little while to handle CLOSE replay. | |
3791 | */ | |
3792 | if (list_empty(&oo->oo_owner.so_stateids)) | |
3793 | move_to_close_lru(oo); | |
3794 | } | |
3795 | } | |
1da177e4 | 3796 | out: |
5ec094c1 BF |
3797 | if (!cstate->replay_owner) |
3798 | nfs4_unlock_state(); | |
1da177e4 LT |
3799 | return status; |
3800 | } | |
3801 | ||
b37ad28b | 3802 | __be32 |
ca364317 BF |
3803 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3804 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3805 | { |
203a8c8e BF |
3806 | struct nfs4_delegation *dp; |
3807 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3808 | struct nfs4_stid *s; |
203a8c8e | 3809 | struct inode *inode; |
b37ad28b | 3810 | __be32 status; |
1da177e4 | 3811 | |
ca364317 | 3812 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3813 | return status; |
3814 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3815 | |
3816 | nfs4_lock_state(); | |
d15c077e | 3817 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); |
38c2f4b1 | 3818 | if (status) |
203a8c8e | 3819 | goto out; |
38c2f4b1 | 3820 | dp = delegstateid(s); |
d5477a8d | 3821 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3822 | if (status) |
3823 | goto out; | |
203a8c8e BF |
3824 | |
3825 | unhash_delegation(dp); | |
1da177e4 | 3826 | out: |
203a8c8e BF |
3827 | nfs4_unlock_state(); |
3828 | ||
1da177e4 LT |
3829 | return status; |
3830 | } | |
3831 | ||
3832 | ||
1da177e4 | 3833 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3834 | |
009673b4 BF |
3835 | #define LOCKOWNER_INO_HASH_BITS 8 |
3836 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3837 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3838 | |
87df4de8 BH |
3839 | static inline u64 |
3840 | end_offset(u64 start, u64 len) | |
3841 | { | |
3842 | u64 end; | |
3843 | ||
3844 | end = start + len; | |
3845 | return end >= start ? end: NFS4_MAX_UINT64; | |
3846 | } | |
3847 | ||
3848 | /* last octet in a range */ | |
3849 | static inline u64 | |
3850 | last_byte_offset(u64 start, u64 len) | |
3851 | { | |
3852 | u64 end; | |
3853 | ||
3854 | BUG_ON(!len); | |
3855 | end = start + len; | |
3856 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3857 | } | |
3858 | ||
009673b4 | 3859 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3860 | { |
3861 | return (file_hashval(inode) + cl_id | |
3862 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3863 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3864 | } |
3865 | ||
009673b4 | 3866 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3867 | |
1da177e4 LT |
3868 | /* |
3869 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3870 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3871 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3872 | * locking, this prevents us from being completely protocol-compliant. The | |
3873 | * real solution to this problem is to start using unsigned file offsets in | |
3874 | * the VFS, but this is a very deep change! | |
3875 | */ | |
3876 | static inline void | |
3877 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3878 | { | |
3879 | if (lock->fl_start < 0) | |
3880 | lock->fl_start = OFFSET_MAX; | |
3881 | if (lock->fl_end < 0) | |
3882 | lock->fl_end = OFFSET_MAX; | |
3883 | } | |
3884 | ||
d5b9026a N |
3885 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3886 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3887 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3888 | }; |
1da177e4 LT |
3889 | |
3890 | static inline void | |
3891 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3892 | { | |
fe0750e5 | 3893 | struct nfs4_lockowner *lo; |
1da177e4 | 3894 | |
d5b9026a | 3895 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3896 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3897 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3898 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3899 | if (!deny->ld_owner.data) |
3900 | /* We just don't care that much */ | |
3901 | goto nevermind; | |
fe0750e5 BF |
3902 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3903 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3904 | } else { |
7c13f344 BF |
3905 | nevermind: |
3906 | deny->ld_owner.len = 0; | |
3907 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3908 | deny->ld_clientid.cl_boot = 0; |
3909 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3910 | } |
3911 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3912 | deny->ld_length = NFS4_MAX_UINT64; |
3913 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3914 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3915 | deny->ld_type = NFS4_READ_LT; | |
3916 | if (fl->fl_type != F_RDLCK) | |
3917 | deny->ld_type = NFS4_WRITE_LT; | |
3918 | } | |
3919 | ||
b93d87c1 BF |
3920 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3921 | { | |
3922 | struct nfs4_ol_stateid *lst; | |
3923 | ||
3924 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3925 | return false; | |
3926 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3927 | struct nfs4_ol_stateid, st_perstateowner); | |
3928 | return lst->st_file->fi_inode == inode; | |
3929 | } | |
3930 | ||
fe0750e5 BF |
3931 | static struct nfs4_lockowner * |
3932 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3933 | struct xdr_netobj *owner) |
3934 | { | |
009673b4 | 3935 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3936 | struct nfs4_lockowner *lo; |
1da177e4 | 3937 | |
009673b4 | 3938 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3939 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3940 | return lo; | |
1da177e4 LT |
3941 | } |
3942 | return NULL; | |
3943 | } | |
3944 | ||
dcef0413 | 3945 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3946 | { |
009673b4 BF |
3947 | struct inode *inode = open_stp->st_file->fi_inode; |
3948 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3949 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3950 | ||
16bfdaaf | 3951 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3952 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3953 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3954 | } |
3955 | ||
1da177e4 LT |
3956 | /* |
3957 | * Alloc a lock owner structure. | |
3958 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3959 | * occurred. |
1da177e4 | 3960 | * |
16bfdaaf | 3961 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3962 | */ |
3963 | ||
fe0750e5 | 3964 | static struct nfs4_lockowner * |
dcef0413 | 3965 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3966 | struct nfs4_lockowner *lo; |
1da177e4 | 3967 | |
fe0750e5 BF |
3968 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3969 | if (!lo) | |
1da177e4 | 3970 | return NULL; |
fe0750e5 BF |
3971 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3972 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3973 | /* It is the openowner seqid that will be incremented in encode in the |
3974 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3975 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3976 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3977 | return lo; | |
1da177e4 LT |
3978 | } |
3979 | ||
dcef0413 BF |
3980 | static struct nfs4_ol_stateid * |
3981 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3982 | { |
dcef0413 | 3983 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3984 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3985 | |
996e0938 | 3986 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3987 | if (stp == NULL) |
6136d2b4 | 3988 | return NULL; |
996e0938 | 3989 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3990 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3991 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3992 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3993 | get_nfs4_file(fp); |
1da177e4 | 3994 | stp->st_file = fp; |
0997b173 | 3995 | stp->st_access_bmap = 0; |
1da177e4 | 3996 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3997 | stp->st_openstp = open_stp; |
1da177e4 LT |
3998 | return stp; |
3999 | } | |
4000 | ||
fd39ca9a | 4001 | static int |
1da177e4 LT |
4002 | check_lock_length(u64 offset, u64 length) |
4003 | { | |
87df4de8 | 4004 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4005 | LOFF_OVERFLOW(offset, length))); |
4006 | } | |
4007 | ||
dcef0413 | 4008 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4009 | { |
4010 | struct nfs4_file *fp = lock_stp->st_file; | |
4011 | int oflag = nfs4_access_to_omode(access); | |
4012 | ||
82c5ff1b | 4013 | if (test_access(access, lock_stp)) |
0997b173 BF |
4014 | return; |
4015 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4016 | set_access(access, lock_stp); |
0997b173 BF |
4017 | } |
4018 | ||
2355c596 | 4019 | static __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) |
64a284d0 BF |
4020 | { |
4021 | struct nfs4_file *fi = ost->st_file; | |
4022 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4023 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4024 | struct nfs4_lockowner *lo; | |
4025 | unsigned int strhashval; | |
4026 | ||
4027 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4028 | if (lo) { | |
4029 | if (!cstate->minorversion) | |
4030 | return nfserr_bad_seqid; | |
4031 | /* XXX: a lockowner always has exactly one stateid: */ | |
4032 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4033 | struct nfs4_ol_stateid, st_perstateowner); | |
4034 | return nfs_ok; | |
4035 | } | |
16bfdaaf | 4036 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4037 | &lock->v.new.owner); |
4038 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4039 | if (lo == NULL) | |
4040 | return nfserr_jukebox; | |
4041 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4042 | if (*lst == NULL) { | |
4043 | release_lockowner(lo); | |
4044 | return nfserr_jukebox; | |
4045 | } | |
4046 | *new = true; | |
4047 | return nfs_ok; | |
4048 | } | |
4049 | ||
1da177e4 LT |
4050 | /* |
4051 | * LOCK operation | |
4052 | */ | |
b37ad28b | 4053 | __be32 |
ca364317 | 4054 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4055 | struct nfsd4_lock *lock) |
1da177e4 | 4056 | { |
fe0750e5 BF |
4057 | struct nfs4_openowner *open_sop = NULL; |
4058 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4059 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4060 | struct file *filp = NULL; |
21179d81 JL |
4061 | struct file_lock *file_lock = NULL; |
4062 | struct file_lock *conflock = NULL; | |
b37ad28b | 4063 | __be32 status = 0; |
64a284d0 | 4064 | bool new_state = false; |
b34f27aa | 4065 | int lkflg; |
b8dd7b9a | 4066 | int err; |
2c142baa | 4067 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
4068 | |
4069 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4070 | (long long) lock->lk_offset, | |
4071 | (long long) lock->lk_length); | |
4072 | ||
1da177e4 LT |
4073 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4074 | return nfserr_inval; | |
4075 | ||
ca364317 | 4076 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4077 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4078 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4079 | return status; | |
4080 | } | |
4081 | ||
1da177e4 LT |
4082 | nfs4_lock_state(); |
4083 | ||
4084 | if (lock->lk_is_new) { | |
dcef0413 | 4085 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4086 | |
4087 | if (nfsd4_has_session(cstate)) | |
4088 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4089 | memcpy(&lock->v.new.clientid, | |
4090 | &cstate->session->se_client->cl_clientid, | |
4091 | sizeof(clientid_t)); | |
4092 | ||
1da177e4 | 4093 | status = nfserr_stale_clientid; |
2c142baa | 4094 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4095 | goto out; |
1da177e4 | 4096 | |
1da177e4 | 4097 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4098 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4099 | lock->lk_new_open_seqid, |
4100 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4101 | &open_stp); |
37515177 | 4102 | if (status) |
1da177e4 | 4103 | goto out; |
fe0750e5 | 4104 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4105 | status = nfserr_bad_stateid; |
684e5638 | 4106 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4107 | &lock->v.new.clientid)) |
4108 | goto out; | |
64a284d0 BF |
4109 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4110 | &lock_stp, &new_state); | |
e1aaa891 | 4111 | } else |
dd453dfd | 4112 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4113 | lock->lk_old_lock_seqid, |
4114 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4115 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4116 | if (status) |
4117 | goto out; | |
64a284d0 | 4118 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4119 | |
b34f27aa BF |
4120 | lkflg = setlkflg(lock->lk_type); |
4121 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4122 | if (status) | |
4123 | goto out; | |
4124 | ||
0dd395dc | 4125 | status = nfserr_grace; |
5ccb0066 | 4126 | if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) |
0dd395dc N |
4127 | goto out; |
4128 | status = nfserr_no_grace; | |
5ccb0066 | 4129 | if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) |
0dd395dc N |
4130 | goto out; |
4131 | ||
21179d81 JL |
4132 | file_lock = locks_alloc_lock(); |
4133 | if (!file_lock) { | |
4134 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4135 | status = nfserr_jukebox; | |
4136 | goto out; | |
4137 | } | |
4138 | ||
4139 | locks_init_lock(file_lock); | |
1da177e4 LT |
4140 | switch (lock->lk_type) { |
4141 | case NFS4_READ_LT: | |
4142 | case NFS4_READW_LT: | |
0997b173 BF |
4143 | filp = find_readable_file(lock_stp->st_file); |
4144 | if (filp) | |
4145 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4146 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4147 | break; |
1da177e4 LT |
4148 | case NFS4_WRITE_LT: |
4149 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4150 | filp = find_writeable_file(lock_stp->st_file); |
4151 | if (filp) | |
4152 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4153 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4154 | break; |
1da177e4 LT |
4155 | default: |
4156 | status = nfserr_inval; | |
4157 | goto out; | |
4158 | } | |
f9d7562f BF |
4159 | if (!filp) { |
4160 | status = nfserr_openmode; | |
4161 | goto out; | |
4162 | } | |
21179d81 JL |
4163 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4164 | file_lock->fl_pid = current->tgid; | |
4165 | file_lock->fl_file = filp; | |
4166 | file_lock->fl_flags = FL_POSIX; | |
4167 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4168 | file_lock->fl_start = lock->lk_offset; | |
4169 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4170 | nfs4_transform_lock_offset(file_lock); | |
4171 | ||
4172 | conflock = locks_alloc_lock(); | |
4173 | if (!conflock) { | |
4174 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4175 | status = nfserr_jukebox; | |
4176 | goto out; | |
4177 | } | |
1da177e4 | 4178 | |
21179d81 | 4179 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4180 | switch (-err) { |
1da177e4 | 4181 | case 0: /* success! */ |
dcef0413 BF |
4182 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4183 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4184 | sizeof(stateid_t)); |
b8dd7b9a | 4185 | status = 0; |
eb76b3fd AA |
4186 | break; |
4187 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4188 | status = nfserr_denied; | |
4189 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4190 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4191 | break; |
1da177e4 LT |
4192 | case (EDEADLK): |
4193 | status = nfserr_deadlock; | |
eb76b3fd | 4194 | break; |
3e772463 | 4195 | default: |
fd85b817 | 4196 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4197 | status = nfserrno(err); |
eb76b3fd | 4198 | break; |
1da177e4 | 4199 | } |
1da177e4 | 4200 | out: |
64a284d0 | 4201 | if (status && new_state) |
f044ff83 | 4202 | release_lockowner(lock_sop); |
5ec094c1 BF |
4203 | if (!cstate->replay_owner) |
4204 | nfs4_unlock_state(); | |
21179d81 JL |
4205 | if (file_lock) |
4206 | locks_free_lock(file_lock); | |
4207 | if (conflock) | |
4208 | locks_free_lock(conflock); | |
1da177e4 LT |
4209 | return status; |
4210 | } | |
4211 | ||
55ef1274 BF |
4212 | /* |
4213 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4214 | * so we do a temporary open here just to get an open file to pass to | |
4215 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4216 | * inode operation.) | |
4217 | */ | |
04da6e9d | 4218 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4219 | { |
4220 | struct file *file; | |
04da6e9d AV |
4221 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4222 | if (!err) { | |
4223 | err = nfserrno(vfs_test_lock(file, lock)); | |
4224 | nfsd_close(file); | |
4225 | } | |
55ef1274 BF |
4226 | return err; |
4227 | } | |
4228 | ||
1da177e4 LT |
4229 | /* |
4230 | * LOCKT operation | |
4231 | */ | |
b37ad28b | 4232 | __be32 |
ca364317 BF |
4233 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4234 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4235 | { |
4236 | struct inode *inode; | |
21179d81 | 4237 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4238 | struct nfs4_lockowner *lo; |
b37ad28b | 4239 | __be32 status; |
2c142baa | 4240 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 4241 | |
5ccb0066 | 4242 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4243 | return nfserr_grace; |
4244 | ||
4245 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4246 | return nfserr_inval; | |
4247 | ||
1da177e4 LT |
4248 | nfs4_lock_state(); |
4249 | ||
4250 | status = nfserr_stale_clientid; | |
2c142baa | 4251 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) |
1da177e4 | 4252 | goto out; |
1da177e4 | 4253 | |
75c096f7 | 4254 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4255 | goto out; |
1da177e4 | 4256 | |
ca364317 | 4257 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4258 | file_lock = locks_alloc_lock(); |
4259 | if (!file_lock) { | |
4260 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4261 | status = nfserr_jukebox; | |
4262 | goto out; | |
4263 | } | |
4264 | locks_init_lock(file_lock); | |
1da177e4 LT |
4265 | switch (lockt->lt_type) { |
4266 | case NFS4_READ_LT: | |
4267 | case NFS4_READW_LT: | |
21179d81 | 4268 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4269 | break; |
4270 | case NFS4_WRITE_LT: | |
4271 | case NFS4_WRITEW_LT: | |
21179d81 | 4272 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4273 | break; |
4274 | default: | |
2fdada03 | 4275 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4276 | status = nfserr_inval; |
4277 | goto out; | |
4278 | } | |
4279 | ||
fe0750e5 BF |
4280 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4281 | if (lo) | |
21179d81 JL |
4282 | file_lock->fl_owner = (fl_owner_t)lo; |
4283 | file_lock->fl_pid = current->tgid; | |
4284 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4285 | |
21179d81 JL |
4286 | file_lock->fl_start = lockt->lt_offset; |
4287 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4288 | |
21179d81 | 4289 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4290 | |
21179d81 | 4291 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4292 | if (status) |
fd85b817 | 4293 | goto out; |
04da6e9d | 4294 | |
21179d81 | 4295 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4296 | status = nfserr_denied; |
21179d81 | 4297 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4298 | } |
4299 | out: | |
4300 | nfs4_unlock_state(); | |
21179d81 JL |
4301 | if (file_lock) |
4302 | locks_free_lock(file_lock); | |
1da177e4 LT |
4303 | return status; |
4304 | } | |
4305 | ||
b37ad28b | 4306 | __be32 |
ca364317 | 4307 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4308 | struct nfsd4_locku *locku) |
1da177e4 | 4309 | { |
dcef0413 | 4310 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4311 | struct file *filp = NULL; |
21179d81 | 4312 | struct file_lock *file_lock = NULL; |
b37ad28b | 4313 | __be32 status; |
b8dd7b9a | 4314 | int err; |
1da177e4 LT |
4315 | |
4316 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4317 | (long long) locku->lu_offset, | |
4318 | (long long) locku->lu_length); | |
4319 | ||
4320 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4321 | return nfserr_inval; | |
4322 | ||
4323 | nfs4_lock_state(); | |
4324 | ||
9072d5c6 | 4325 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4326 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4327 | if (status) |
1da177e4 | 4328 | goto out; |
f9d7562f BF |
4329 | filp = find_any_file(stp->st_file); |
4330 | if (!filp) { | |
4331 | status = nfserr_lock_range; | |
4332 | goto out; | |
4333 | } | |
21179d81 JL |
4334 | file_lock = locks_alloc_lock(); |
4335 | if (!file_lock) { | |
4336 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4337 | status = nfserr_jukebox; | |
4338 | goto out; | |
4339 | } | |
4340 | locks_init_lock(file_lock); | |
4341 | file_lock->fl_type = F_UNLCK; | |
4342 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4343 | file_lock->fl_pid = current->tgid; | |
4344 | file_lock->fl_file = filp; | |
4345 | file_lock->fl_flags = FL_POSIX; | |
4346 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4347 | file_lock->fl_start = locku->lu_offset; | |
4348 | ||
4349 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4350 | locku->lu_length); | |
4351 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4352 | |
4353 | /* | |
4354 | * Try to unlock the file in the VFS. | |
4355 | */ | |
21179d81 | 4356 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4357 | if (err) { |
fd85b817 | 4358 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4359 | goto out_nfserr; |
4360 | } | |
4361 | /* | |
4362 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4363 | */ | |
dcef0413 BF |
4364 | update_stateid(&stp->st_stid.sc_stateid); |
4365 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4366 | |
4367 | out: | |
71c3bcd7 BF |
4368 | if (!cstate->replay_owner) |
4369 | nfs4_unlock_state(); | |
21179d81 JL |
4370 | if (file_lock) |
4371 | locks_free_lock(file_lock); | |
1da177e4 LT |
4372 | return status; |
4373 | ||
4374 | out_nfserr: | |
b8dd7b9a | 4375 | status = nfserrno(err); |
1da177e4 LT |
4376 | goto out; |
4377 | } | |
4378 | ||
4379 | /* | |
4380 | * returns | |
4381 | * 1: locks held by lockowner | |
4382 | * 0: no locks held by lockowner | |
4383 | */ | |
4384 | static int | |
fe0750e5 | 4385 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4386 | { |
4387 | struct file_lock **flpp; | |
f9d7562f | 4388 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4389 | int status = 0; |
4390 | ||
b89f4321 | 4391 | lock_flocks(); |
1da177e4 | 4392 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4393 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4394 | status = 1; |
4395 | goto out; | |
796dadfd | 4396 | } |
1da177e4 LT |
4397 | } |
4398 | out: | |
b89f4321 | 4399 | unlock_flocks(); |
1da177e4 LT |
4400 | return status; |
4401 | } | |
4402 | ||
b37ad28b | 4403 | __be32 |
b591480b BF |
4404 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4405 | struct nfsd4_compound_state *cstate, | |
4406 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4407 | { |
4408 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4409 | struct nfs4_stateowner *sop; |
fe0750e5 | 4410 | struct nfs4_lockowner *lo; |
dcef0413 | 4411 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4412 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4413 | struct list_head matches; |
16bfdaaf | 4414 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4415 | __be32 status; |
2c142baa | 4416 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
4417 | |
4418 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4419 | clid->cl_boot, clid->cl_id); | |
4420 | ||
4421 | /* XXX check for lease expiration */ | |
4422 | ||
4423 | status = nfserr_stale_clientid; | |
2c142baa | 4424 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4425 | return status; |
1da177e4 LT |
4426 | |
4427 | nfs4_lock_state(); | |
4428 | ||
3e9e3dbe | 4429 | status = nfserr_locks_held; |
3e9e3dbe | 4430 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4431 | |
16bfdaaf BF |
4432 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4433 | if (sop->so_is_open_owner) | |
4434 | continue; | |
06f1f864 BF |
4435 | if (!same_owner_str(sop, owner, clid)) |
4436 | continue; | |
4437 | list_for_each_entry(stp, &sop->so_stateids, | |
4438 | st_perstateowner) { | |
4439 | lo = lockowner(sop); | |
4440 | if (check_for_locks(stp->st_file, lo)) | |
4441 | goto out; | |
4442 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4443 | } |
3e9e3dbe N |
4444 | } |
4445 | /* Clients probably won't expect us to return with some (but not all) | |
4446 | * of the lockowner state released; so don't release any until all | |
4447 | * have been checked. */ | |
4448 | status = nfs_ok; | |
0fa822e4 | 4449 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4450 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4451 | lo_list); | |
0fa822e4 N |
4452 | /* unhash_stateowner deletes so_perclient only |
4453 | * for openowners. */ | |
fe0750e5 BF |
4454 | list_del(&lo->lo_list); |
4455 | release_lockowner(lo); | |
1da177e4 LT |
4456 | } |
4457 | out: | |
4458 | nfs4_unlock_state(); | |
4459 | return status; | |
4460 | } | |
4461 | ||
4462 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4463 | alloc_reclaim(void) |
1da177e4 | 4464 | { |
a55370a3 | 4465 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4466 | } |
4467 | ||
c7b9a459 | 4468 | int |
a1bcecd2 | 4469 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4470 | { |
4471 | unsigned int strhashval = clientstr_hashval(name); | |
4472 | struct nfs4_client *clp; | |
4473 | ||
e203d506 | 4474 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4475 | if (!clp) |
4476 | return 0; | |
a52d726b | 4477 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4478 | } |
4479 | ||
1da177e4 LT |
4480 | /* |
4481 | * failure => all reset bets are off, nfserr_no_grace... | |
4482 | */ | |
190e4fbf N |
4483 | int |
4484 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4485 | { |
4486 | unsigned int strhashval; | |
4487 | struct nfs4_client_reclaim *crp = NULL; | |
4488 | ||
a55370a3 N |
4489 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4490 | crp = alloc_reclaim(); | |
1da177e4 LT |
4491 | if (!crp) |
4492 | return 0; | |
a55370a3 | 4493 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4494 | INIT_LIST_HEAD(&crp->cr_strhash); |
4495 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4496 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4497 | reclaim_str_hashtbl_size++; |
4498 | return 1; | |
4499 | } | |
4500 | ||
2a4317c5 | 4501 | void |
1da177e4 LT |
4502 | nfs4_release_reclaim(void) |
4503 | { | |
4504 | struct nfs4_client_reclaim *crp = NULL; | |
4505 | int i; | |
4506 | ||
1da177e4 LT |
4507 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4508 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4509 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4510 | struct nfs4_client_reclaim, cr_strhash); | |
4511 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4512 | kfree(crp); |
4513 | reclaim_str_hashtbl_size--; | |
4514 | } | |
4515 | } | |
4516 | BUG_ON(reclaim_str_hashtbl_size); | |
4517 | } | |
4518 | ||
4519 | /* | |
4520 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4521 | struct nfs4_client_reclaim * |
a52d726b | 4522 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4523 | { |
4524 | unsigned int strhashval; | |
1da177e4 LT |
4525 | struct nfs4_client_reclaim *crp = NULL; |
4526 | ||
a55370a3 N |
4527 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4528 | clp->cl_name.len, clp->cl_name.data, | |
4529 | clp->cl_recdir); | |
1da177e4 LT |
4530 | |
4531 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4532 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4533 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4534 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4535 | return crp; |
4536 | } | |
4537 | } | |
4538 | return NULL; | |
4539 | } | |
4540 | ||
4541 | /* | |
4542 | * Called from OPEN. Look for clientid in reclaim list. | |
4543 | */ | |
b37ad28b | 4544 | __be32 |
d15c077e | 4545 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions) |
1da177e4 | 4546 | { |
a52d726b JL |
4547 | struct nfs4_client *clp; |
4548 | ||
4549 | /* find clientid in conf_id_hashtbl */ | |
d15c077e | 4550 | clp = find_confirmed_client(clid, sessions); |
a52d726b JL |
4551 | if (clp == NULL) |
4552 | return nfserr_reclaim_bad; | |
4553 | ||
4554 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4555 | } |
4556 | ||
65178db4 BS |
4557 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4558 | ||
4559 | void nfsd_forget_clients(u64 num) | |
4560 | { | |
4561 | struct nfs4_client *clp, *next; | |
4562 | int count = 0; | |
4563 | ||
4564 | nfs4_lock_state(); | |
4565 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4566 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4567 | expire_client(clp); |
4568 | if (++count == num) | |
4569 | break; | |
4570 | } | |
4571 | nfs4_unlock_state(); | |
4572 | ||
4573 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4574 | } | |
4575 | ||
4576 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4577 | { | |
4578 | release_lockowner(lockowner(sop)); | |
4579 | } | |
4580 | ||
4581 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4582 | { | |
4583 | release_openowner(openowner(sop)); | |
4584 | } | |
4585 | ||
353de31b | 4586 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4587 | void (*release_sop)(struct nfs4_stateowner *)) |
4588 | { | |
4589 | int i, count = 0; | |
4590 | struct nfs4_stateowner *sop, *next; | |
4591 | ||
16bfdaaf BF |
4592 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4593 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4594 | if (sop->so_is_open_owner != is_open_owner) | |
4595 | continue; | |
65178db4 BS |
4596 | release_sop(sop); |
4597 | if (++count == num) | |
4598 | return count; | |
4599 | } | |
4600 | } | |
4601 | return count; | |
4602 | } | |
4603 | ||
4604 | void nfsd_forget_locks(u64 num) | |
4605 | { | |
4606 | int count; | |
4607 | ||
4608 | nfs4_lock_state(); | |
16bfdaaf | 4609 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4610 | nfs4_unlock_state(); |
4611 | ||
4612 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4613 | } | |
4614 | ||
4615 | void nfsd_forget_openowners(u64 num) | |
4616 | { | |
4617 | int count; | |
4618 | ||
4619 | nfs4_lock_state(); | |
16bfdaaf | 4620 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4621 | nfs4_unlock_state(); |
4622 | ||
4623 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4624 | } | |
4625 | ||
da5c80a9 | 4626 | static int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4627 | { |
4628 | int i, count = 0; | |
2d3475c0 BS |
4629 | struct nfs4_file *fp, *fnext; |
4630 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4631 | |
4632 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4633 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4634 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4635 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4636 | if (++count == num) |
4637 | return count; | |
4638 | } | |
4639 | } | |
4640 | } | |
2d3475c0 | 4641 | |
65178db4 BS |
4642 | return count; |
4643 | } | |
4644 | ||
4645 | void nfsd_forget_delegations(u64 num) | |
4646 | { | |
4647 | unsigned int count; | |
a6d88f29 SK |
4648 | LIST_HEAD(victims); |
4649 | struct nfs4_delegation *dp, *dnext; | |
4650 | ||
4651 | spin_lock(&recall_lock); | |
4652 | count = nfsd_process_n_delegations(num, &victims); | |
4653 | spin_unlock(&recall_lock); | |
65178db4 BS |
4654 | |
4655 | nfs4_lock_state(); | |
a6d88f29 SK |
4656 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4657 | unhash_delegation(dp); | |
65178db4 BS |
4658 | nfs4_unlock_state(); |
4659 | ||
4660 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4661 | } | |
4662 | ||
4663 | void nfsd_recall_delegations(u64 num) | |
4664 | { | |
4665 | unsigned int count; | |
a6d88f29 SK |
4666 | LIST_HEAD(victims); |
4667 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4668 | |
65178db4 | 4669 | spin_lock(&recall_lock); |
a6d88f29 SK |
4670 | count = nfsd_process_n_delegations(num, &victims); |
4671 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4672 | list_del(&dp->dl_recall_lru); | |
4673 | nfsd_break_one_deleg(dp); | |
4674 | } | |
65178db4 | 4675 | spin_unlock(&recall_lock); |
65178db4 BS |
4676 | |
4677 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4678 | } | |
4679 | ||
4680 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4681 | ||
ac4d8ff2 | 4682 | /* initialization to perform at module load time: */ |
1da177e4 | 4683 | |
72083396 | 4684 | void |
ac4d8ff2 | 4685 | nfs4_state_init(void) |
1da177e4 | 4686 | { |
72083396 | 4687 | int i; |
1da177e4 | 4688 | |
1da177e4 LT |
4689 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4690 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4691 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4692 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4693 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4694 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4695 | } |
5282fd72 ME |
4696 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4697 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4698 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4699 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4700 | } | |
16bfdaaf BF |
4701 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4702 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4703 | } |
009673b4 BF |
4704 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4705 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4706 | INIT_LIST_HEAD(&close_lru); |
4707 | INIT_LIST_HEAD(&client_lru); | |
4708 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4709 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4710 | } |
4711 | ||
c2f1a551 MS |
4712 | /* |
4713 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4714 | * client may quite reasonably hang on to a delegation as long as it has | |
4715 | * the inode cached. This becomes an obvious problem the first time a | |
4716 | * client's inode cache approaches the size of the server's total memory. | |
4717 | * | |
4718 | * For now we avoid this problem by imposing a hard limit on the number | |
4719 | * of delegations, which varies according to the server's memory size. | |
4720 | */ | |
4721 | static void | |
4722 | set_max_delegations(void) | |
4723 | { | |
4724 | /* | |
4725 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4726 | * estimates suggest that in the worst case (where every delegation | |
4727 | * is for a different inode), a delegation could take about 1.5K, | |
4728 | * giving a worst case usage of about 6% of memory. | |
4729 | */ | |
4730 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4731 | } | |
4732 | ||
ac4d8ff2 N |
4733 | /* initialization to perform when the nfsd service is started: */ |
4734 | ||
a6d6b781 JL |
4735 | int |
4736 | nfs4_state_start(void) | |
ac4d8ff2 | 4737 | { |
5e1533c7 SK |
4738 | struct net *net = &init_net; |
4739 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4740 | int ret; |
4741 | ||
2a4317c5 JL |
4742 | /* |
4743 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4744 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4745 | * need to pass a net pointer into this function, take a reference | |
4746 | * to that instead and then do most of the rest of this on a per-net | |
4747 | * basis. | |
4748 | */ | |
5e1533c7 SK |
4749 | get_net(net); |
4750 | nfsd4_client_tracking_init(net); | |
2c142baa | 4751 | nn->boot_time = get_seconds(); |
5ccb0066 | 4752 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4753 | nn->grace_ended = false; |
9a8db97e | 4754 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4755 | nfsd4_grace); |
b5a1a81e | 4756 | ret = set_callback_cred(); |
a6d6b781 JL |
4757 | if (ret) { |
4758 | ret = -ENOMEM; | |
4759 | goto out_recovery; | |
4760 | } | |
58da282b | 4761 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4762 | if (laundry_wq == NULL) { |
4763 | ret = -ENOMEM; | |
4764 | goto out_recovery; | |
4765 | } | |
b5a1a81e BF |
4766 | ret = nfsd4_create_callback_queue(); |
4767 | if (ret) | |
4768 | goto out_free_laundry; | |
e46b498c | 4769 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4770 | set_max_delegations(); |
b5a1a81e BF |
4771 | return 0; |
4772 | out_free_laundry: | |
4773 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4774 | out_recovery: |
5e1533c7 SK |
4775 | nfsd4_client_tracking_exit(net); |
4776 | put_net(net); | |
b5a1a81e | 4777 | return ret; |
1da177e4 LT |
4778 | } |
4779 | ||
1da177e4 LT |
4780 | static void |
4781 | __nfs4_state_shutdown(void) | |
4782 | { | |
4783 | int i; | |
4784 | struct nfs4_client *clp = NULL; | |
4785 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4786 | struct list_head *pos, *next, reaplist; |
4787 | ||
1da177e4 LT |
4788 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4789 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4790 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4791 | expire_client(clp); | |
4792 | } | |
4793 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4794 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4795 | expire_client(clp); | |
4796 | } | |
4797 | } | |
4798 | INIT_LIST_HEAD(&reaplist); | |
4799 | spin_lock(&recall_lock); | |
4800 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4801 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4802 | list_move(&dp->dl_recall_lru, &reaplist); | |
4803 | } | |
4804 | spin_unlock(&recall_lock); | |
4805 | list_for_each_safe(pos, next, &reaplist) { | |
4806 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4807 | unhash_delegation(dp); |
4808 | } | |
4809 | ||
2a4317c5 JL |
4810 | nfsd4_client_tracking_exit(&init_net); |
4811 | put_net(&init_net); | |
1da177e4 LT |
4812 | } |
4813 | ||
4814 | void | |
4815 | nfs4_state_shutdown(void) | |
4816 | { | |
5e1533c7 SK |
4817 | struct net *net = &init_net; |
4818 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4819 | ||
afe2c511 | 4820 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4821 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4822 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4823 | nfs4_lock_state(); |
1da177e4 | 4824 | __nfs4_state_shutdown(); |
1da177e4 | 4825 | nfs4_unlock_state(); |
c3935e30 | 4826 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4827 | } |
8b70484c TM |
4828 | |
4829 | static void | |
4830 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4831 | { | |
37c593c5 TM |
4832 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4833 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4834 | } |
4835 | ||
4836 | static void | |
4837 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4838 | { | |
37c593c5 TM |
4839 | if (cstate->minorversion) { |
4840 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4841 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4842 | } | |
4843 | } | |
4844 | ||
4845 | void | |
4846 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4847 | { | |
4848 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4849 | } |
4850 | ||
62cd4a59 TM |
4851 | /* |
4852 | * functions to set current state id | |
4853 | */ | |
9428fe1a TM |
4854 | void |
4855 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4856 | { | |
4857 | put_stateid(cstate, &odp->od_stateid); | |
4858 | } | |
4859 | ||
8b70484c TM |
4860 | void |
4861 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4862 | { | |
4863 | put_stateid(cstate, &open->op_stateid); | |
4864 | } | |
4865 | ||
62cd4a59 TM |
4866 | void |
4867 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4868 | { | |
4869 | put_stateid(cstate, &close->cl_stateid); | |
4870 | } | |
4871 | ||
4872 | void | |
4873 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4874 | { | |
4875 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4876 | } | |
4877 | ||
4878 | /* | |
4879 | * functions to consume current state id | |
4880 | */ | |
1e97b519 | 4881 | |
9428fe1a TM |
4882 | void |
4883 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4884 | { | |
4885 | get_stateid(cstate, &odp->od_stateid); | |
4886 | } | |
4887 | ||
4888 | void | |
4889 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4890 | { | |
4891 | get_stateid(cstate, &drp->dr_stateid); | |
4892 | } | |
4893 | ||
1e97b519 TM |
4894 | void |
4895 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4896 | { | |
4897 | get_stateid(cstate, &fsp->fr_stateid); | |
4898 | } | |
4899 | ||
4900 | void | |
4901 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4902 | { | |
4903 | get_stateid(cstate, &setattr->sa_stateid); | |
4904 | } | |
4905 | ||
8b70484c TM |
4906 | void |
4907 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4908 | { | |
4909 | get_stateid(cstate, &close->cl_stateid); | |
4910 | } | |
4911 | ||
4912 | void | |
62cd4a59 | 4913 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4914 | { |
62cd4a59 | 4915 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4916 | } |
30813e27 TM |
4917 | |
4918 | void | |
4919 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4920 | { | |
4921 | get_stateid(cstate, &read->rd_stateid); | |
4922 | } | |
4923 | ||
4924 | void | |
4925 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4926 | { | |
4927 | get_stateid(cstate, &write->wr_stateid); | |
4928 | } |