Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
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 | |
a827bcb2 | 761 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
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 | ||
e1ff371f | 855 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 856 | { |
21b75b01 | 857 | int ret; |
ec6b5d7b | 858 | |
db90681d | 859 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
860 | ret = nfsd4_register_conn(conn); |
861 | if (ret) | |
862 | /* oops; xprt is already down: */ | |
863 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 864 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
865 | /* callback channel may be back up */ |
866 | nfsd4_probe_callback(ses->se_client); | |
867 | } | |
c7662518 | 868 | } |
ec6b5d7b | 869 | |
e1ff371f | 870 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
871 | { |
872 | u32 dir = NFS4_CDFC4_FORE; | |
873 | ||
e1ff371f | 874 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 875 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 876 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
877 | } |
878 | ||
879 | /* must be called under client_lock */ | |
19cf5c02 | 880 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 881 | { |
19cf5c02 BF |
882 | struct nfs4_client *clp = s->se_client; |
883 | struct nfsd4_conn *c; | |
ec6b5d7b | 884 | |
19cf5c02 BF |
885 | spin_lock(&clp->cl_lock); |
886 | while (!list_empty(&s->se_conns)) { | |
887 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
888 | list_del_init(&c->cn_persession); | |
889 | spin_unlock(&clp->cl_lock); | |
557ce264 | 890 | |
19cf5c02 BF |
891 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
892 | free_conn(c); | |
ec6b5d7b | 893 | |
19cf5c02 BF |
894 | spin_lock(&clp->cl_lock); |
895 | } | |
896 | spin_unlock(&clp->cl_lock); | |
c7662518 | 897 | } |
ec6b5d7b | 898 | |
1377b69e BF |
899 | static void __free_session(struct nfsd4_session *ses) |
900 | { | |
901 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
902 | free_session_slots(ses); | |
903 | kfree(ses); | |
904 | } | |
905 | ||
508dc6e1 | 906 | static void free_session(struct kref *kref) |
c7662518 BF |
907 | { |
908 | struct nfsd4_session *ses; | |
c7662518 | 909 | |
bc2df47a | 910 | lockdep_assert_held(&client_lock); |
c7662518 | 911 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 912 | nfsd4_del_conns(ses); |
1377b69e | 913 | __free_session(ses); |
c7662518 BF |
914 | } |
915 | ||
508dc6e1 BH |
916 | void nfsd4_put_session(struct nfsd4_session *ses) |
917 | { | |
918 | spin_lock(&client_lock); | |
919 | nfsd4_put_session_locked(ses); | |
920 | spin_unlock(&client_lock); | |
921 | } | |
922 | ||
a827bcb2 | 923 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) |
5b6feee9 BF |
924 | { |
925 | struct nfsd4_session *new; | |
5b6feee9 | 926 | int numslots, slotsize; |
5b6feee9 BF |
927 | /* |
928 | * Note decreasing slot size below client's request may | |
929 | * make it difficult for client to function correctly, whereas | |
930 | * decreasing the number of slots will (just?) affect | |
931 | * performance. When short on memory we therefore prefer to | |
932 | * decrease number of slots instead of their size. | |
933 | */ | |
934 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
935 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
936 | if (numslots < 1) |
937 | return NULL; | |
5b6feee9 | 938 | |
a827bcb2 | 939 | new = __alloc_session(slotsize, numslots); |
5b6feee9 BF |
940 | if (!new) { |
941 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 942 | return NULL; |
557ce264 | 943 | } |
5b6feee9 | 944 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
a827bcb2 BF |
945 | return new; |
946 | } | |
557ce264 | 947 | |
7c1f8b65 | 948 | void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 949 | { |
a827bcb2 BF |
950 | int idx; |
951 | ||
ec6b5d7b AA |
952 | new->se_client = clp; |
953 | gen_sessionid(new); | |
ec6b5d7b | 954 | |
c7662518 BF |
955 | INIT_LIST_HEAD(&new->se_conns); |
956 | ||
ac7c46f2 | 957 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 958 | new->se_flags = cses->flags; |
8b5ce5cd | 959 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 960 | kref_init(&new->se_ref); |
5b6feee9 | 961 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 962 | spin_lock(&client_lock); |
ec6b5d7b | 963 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 964 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 965 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 966 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 967 | spin_unlock(&client_lock); |
ec6b5d7b | 968 | |
dcbeaa68 | 969 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 970 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
971 | /* |
972 | * This is a little silly; with sessions there's no real | |
973 | * use for the callback address. Use the peer address | |
974 | * as a reasonable default for now, but consider fixing | |
975 | * the rpc client not to require an address in the | |
976 | * future: | |
977 | */ | |
edd76786 BF |
978 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
979 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 980 | } |
ec6b5d7b AA |
981 | } |
982 | ||
9089f1b4 | 983 | /* caller must hold client_lock */ |
5282fd72 ME |
984 | static struct nfsd4_session * |
985 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
986 | { | |
987 | struct nfsd4_session *elem; | |
988 | int idx; | |
989 | ||
990 | dump_sessionid(__func__, sessionid); | |
991 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
992 | /* Search in the appropriate list */ |
993 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
994 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
995 | NFS4_MAX_SESSIONID_LEN)) { | |
996 | return elem; | |
997 | } | |
998 | } | |
999 | ||
1000 | dprintk("%s: session not found\n", __func__); | |
1001 | return NULL; | |
1002 | } | |
1003 | ||
9089f1b4 | 1004 | /* caller must hold client_lock */ |
7116ed6b | 1005 | static void |
5282fd72 | 1006 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1007 | { |
1008 | list_del(&ses->se_hash); | |
4c649378 | 1009 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1010 | list_del(&ses->se_perclnt); |
4c649378 | 1011 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1012 | } |
1013 | ||
36acb66b | 1014 | /* must be called under the client_lock */ |
1da177e4 | 1015 | static inline void |
36acb66b | 1016 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1017 | { |
07cd4909 | 1018 | if (is_client_expired(clp)) { |
7447758b BF |
1019 | WARN_ON(1); |
1020 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1021 | __func__, |
1022 | clp->cl_clientid.cl_boot, | |
1023 | clp->cl_clientid.cl_id); | |
1024 | return; | |
1025 | } | |
1026 | ||
1da177e4 LT |
1027 | dprintk("renewing client (clientid %08x/%08x)\n", |
1028 | clp->cl_clientid.cl_boot, | |
1029 | clp->cl_clientid.cl_id); | |
1030 | list_move_tail(&clp->cl_lru, &client_lru); | |
1031 | clp->cl_time = get_seconds(); | |
1032 | } | |
1033 | ||
36acb66b BH |
1034 | static inline void |
1035 | renew_client(struct nfs4_client *clp) | |
1036 | { | |
1037 | spin_lock(&client_lock); | |
1038 | renew_client_locked(clp); | |
1039 | spin_unlock(&client_lock); | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1043 | static int | |
2c142baa | 1044 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1045 | { |
2c142baa | 1046 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1047 | return 0; |
60adfc50 | 1048 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1049 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1050 | return 1; |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * XXX Should we use a slab cache ? | |
1055 | * This type of memory management is somewhat inefficient, but we use it | |
1056 | * anyway since SETCLIENTID is not a common operation. | |
1057 | */ | |
35bba9a3 | 1058 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1059 | { |
1060 | struct nfs4_client *clp; | |
1061 | ||
35bba9a3 BF |
1062 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1063 | if (clp == NULL) | |
1064 | return NULL; | |
67114fe6 | 1065 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1066 | if (clp->cl_name.data == NULL) { |
1067 | kfree(clp); | |
1068 | return NULL; | |
1da177e4 | 1069 | } |
35bba9a3 | 1070 | clp->cl_name.len = name.len; |
1da177e4 LT |
1071 | return clp; |
1072 | } | |
1073 | ||
1074 | static inline void | |
1075 | free_client(struct nfs4_client *clp) | |
1076 | { | |
bc2df47a | 1077 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1078 | while (!list_empty(&clp->cl_sessions)) { |
1079 | struct nfsd4_session *ses; | |
1080 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1081 | se_perclnt); | |
1082 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1083 | nfsd4_put_session_locked(ses); |
792c95dd | 1084 | } |
03a4e1f6 | 1085 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1086 | kfree(clp->cl_name.data); |
1087 | kfree(clp); | |
1088 | } | |
1089 | ||
d7682988 BH |
1090 | void |
1091 | release_session_client(struct nfsd4_session *session) | |
1092 | { | |
1093 | struct nfs4_client *clp = session->se_client; | |
1094 | ||
1095 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1096 | return; | |
1097 | if (is_client_expired(clp)) { | |
1098 | free_client(clp); | |
1099 | session->se_client = NULL; | |
1100 | } else | |
1101 | renew_client_locked(clp); | |
1102 | spin_unlock(&client_lock); | |
d7682988 BH |
1103 | } |
1104 | ||
84d38ac9 BH |
1105 | /* must be called under the client_lock */ |
1106 | static inline void | |
1107 | unhash_client_locked(struct nfs4_client *clp) | |
1108 | { | |
792c95dd BF |
1109 | struct nfsd4_session *ses; |
1110 | ||
07cd4909 | 1111 | mark_client_expired(clp); |
84d38ac9 | 1112 | list_del(&clp->cl_lru); |
4c649378 | 1113 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1114 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1115 | list_del_init(&ses->se_hash); | |
4c649378 | 1116 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1117 | } |
1118 | ||
1da177e4 | 1119 | static void |
0d22f68f | 1120 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1121 | { |
fe0750e5 | 1122 | struct nfs4_openowner *oo; |
1da177e4 | 1123 | struct nfs4_delegation *dp; |
1da177e4 LT |
1124 | struct list_head reaplist; |
1125 | ||
1da177e4 LT |
1126 | INIT_LIST_HEAD(&reaplist); |
1127 | spin_lock(&recall_lock); | |
ea1da636 N |
1128 | while (!list_empty(&clp->cl_delegations)) { |
1129 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1130 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1131 | list_move(&dp->dl_recall_lru, &reaplist); |
1132 | } | |
1133 | spin_unlock(&recall_lock); | |
1134 | while (!list_empty(&reaplist)) { | |
1135 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1136 | unhash_delegation(dp); |
1137 | } | |
ea1da636 | 1138 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1139 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1140 | release_openowner(oo); | |
1da177e4 | 1141 | } |
6ff8da08 | 1142 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1143 | if (clp->cl_cb_conn.cb_xprt) |
1144 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1145 | list_del(&clp->cl_idhash); |
1146 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1147 | spin_lock(&client_lock); |
84d38ac9 | 1148 | unhash_client_locked(clp); |
46583e25 BH |
1149 | if (atomic_read(&clp->cl_refcount) == 0) |
1150 | free_client(clp); | |
be1fdf6c | 1151 | spin_unlock(&client_lock); |
1da177e4 LT |
1152 | } |
1153 | ||
0d22f68f BF |
1154 | static void expire_client(struct nfs4_client *clp) |
1155 | { | |
1156 | nfsd4_client_record_remove(clp); | |
1157 | destroy_client(clp); | |
1158 | } | |
1159 | ||
35bba9a3 BF |
1160 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1161 | { | |
1162 | memcpy(target->cl_verifier.data, source->data, | |
1163 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1164 | } |
1165 | ||
35bba9a3 BF |
1166 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1167 | { | |
1da177e4 LT |
1168 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1169 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1170 | } | |
1171 | ||
03a4e1f6 | 1172 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1173 | { |
03a4e1f6 BF |
1174 | if (source->cr_principal) { |
1175 | target->cr_principal = | |
1176 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1177 | if (target->cr_principal == NULL) | |
1178 | return -ENOMEM; | |
1179 | } else | |
1180 | target->cr_principal = NULL; | |
d5497fc6 | 1181 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1182 | target->cr_uid = source->cr_uid; |
1183 | target->cr_gid = source->cr_gid; | |
1184 | target->cr_group_info = source->cr_group_info; | |
1185 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1186 | return 0; |
1da177e4 LT |
1187 | } |
1188 | ||
35bba9a3 | 1189 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1190 | { |
a55370a3 | 1191 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | static int | |
599e0a22 BF |
1195 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1196 | { | |
1197 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1198 | } |
1199 | ||
1200 | static int | |
599e0a22 BF |
1201 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1202 | { | |
1203 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1204 | } |
1205 | ||
8fbba96e BF |
1206 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1207 | { | |
1208 | int i; | |
1209 | ||
1210 | if (g1->ngroups != g2->ngroups) | |
1211 | return false; | |
1212 | for (i=0; i<g1->ngroups; i++) | |
1213 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1214 | return false; | |
1215 | return true; | |
1216 | } | |
1217 | ||
68eb3508 BF |
1218 | /* |
1219 | * RFC 3530 language requires clid_inuse be returned when the | |
1220 | * "principal" associated with a requests differs from that previously | |
1221 | * used. We use uid, gid's, and gss principal string as our best | |
1222 | * approximation. We also don't want to allow non-gss use of a client | |
1223 | * established using gss: in theory cr_principal should catch that | |
1224 | * change, but in practice cr_principal can be null even in the gss case | |
1225 | * since gssd doesn't always pass down a principal string. | |
1226 | */ | |
1227 | static bool is_gss_cred(struct svc_cred *cr) | |
1228 | { | |
1229 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1230 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1231 | } | |
1232 | ||
1233 | ||
5559b50a | 1234 | static bool |
599e0a22 BF |
1235 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1236 | { | |
68eb3508 | 1237 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1238 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1239 | || (cr1->cr_gid != cr2->cr_gid) |
1240 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1241 | return false; | |
1242 | if (cr1->cr_principal == cr2->cr_principal) | |
1243 | return true; | |
1244 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1245 | return false; | |
5559b50a | 1246 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1247 | } |
1248 | ||
5ec7b46c BF |
1249 | static void gen_clid(struct nfs4_client *clp) |
1250 | { | |
1251 | static u32 current_clientid = 1; | |
2c142baa | 1252 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
5ec7b46c | 1253 | |
2c142baa | 1254 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1255 | clp->cl_clientid.cl_id = current_clientid++; |
1256 | } | |
1257 | ||
deda2faa BF |
1258 | static void gen_confirm(struct nfs4_client *clp) |
1259 | { | |
ab4684d1 | 1260 | __be32 verf[2]; |
deda2faa | 1261 | static u32 i; |
1da177e4 | 1262 | |
ab4684d1 CL |
1263 | verf[0] = (__be32)get_seconds(); |
1264 | verf[1] = (__be32)i++; | |
1265 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1266 | } |
1267 | ||
38c2f4b1 | 1268 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1269 | { |
38c2f4b1 | 1270 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1271 | } |
1272 | ||
38c2f4b1 | 1273 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1274 | { |
1275 | struct nfs4_stid *s; | |
4d71ab87 | 1276 | |
38c2f4b1 | 1277 | s = find_stateid(cl, t); |
4d71ab87 BF |
1278 | if (!s) |
1279 | return NULL; | |
f459e453 | 1280 | if (typemask & s->sc_type) |
4581d140 | 1281 | return s; |
4581d140 BF |
1282 | return NULL; |
1283 | } | |
1284 | ||
b09333c4 RL |
1285 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1286 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1287 | { | |
1288 | struct nfs4_client *clp; | |
1289 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1290 | int ret; |
b09333c4 RL |
1291 | |
1292 | clp = alloc_client(name); | |
1293 | if (clp == NULL) | |
1294 | return NULL; | |
1295 | ||
792c95dd | 1296 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1297 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1298 | if (ret) { | |
1299 | spin_lock(&client_lock); | |
1300 | free_client(clp); | |
1301 | spin_unlock(&client_lock); | |
1302 | return NULL; | |
b09333c4 | 1303 | } |
38c2f4b1 | 1304 | idr_init(&clp->cl_stateids); |
b09333c4 | 1305 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1306 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1307 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1308 | INIT_LIST_HEAD(&clp->cl_idhash); |
1309 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1310 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1311 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1312 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1313 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1314 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1315 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1316 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1317 | clear_bit(0, &clp->cl_cb_slot_busy); |
1318 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1319 | copy_verf(clp, verf); | |
1320 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1321 | gen_confirm(clp); |
edd76786 | 1322 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1323 | return clp; |
1324 | } | |
1325 | ||
fd39ca9a | 1326 | static void |
1da177e4 LT |
1327 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1328 | { | |
1329 | unsigned int idhashval; | |
1330 | ||
1331 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1332 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1333 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1334 | renew_client(clp); |
1da177e4 LT |
1335 | } |
1336 | ||
fd39ca9a | 1337 | static void |
1da177e4 LT |
1338 | move_to_confirmed(struct nfs4_client *clp) |
1339 | { | |
1340 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1341 | unsigned int strhashval; | |
1342 | ||
1343 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1344 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1345 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1346 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1347 | renew_client(clp); |
1348 | } | |
1349 | ||
1350 | static struct nfs4_client * | |
d15c077e | 1351 | find_confirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1352 | { |
1353 | struct nfs4_client *clp; | |
1354 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1355 | ||
1356 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 | 1357 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1358 | if ((bool)clp->cl_minorversion != sessions) |
1359 | return NULL; | |
a50d2ad1 | 1360 | renew_client(clp); |
1da177e4 | 1361 | return clp; |
a50d2ad1 | 1362 | } |
1da177e4 LT |
1363 | } |
1364 | return NULL; | |
1365 | } | |
1366 | ||
1367 | static struct nfs4_client * | |
d15c077e | 1368 | find_unconfirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1369 | { |
1370 | struct nfs4_client *clp; | |
1371 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1372 | ||
1373 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
d15c077e BF |
1374 | if (same_clid(&clp->cl_clientid, clid)) { |
1375 | if ((bool)clp->cl_minorversion != sessions) | |
1376 | return NULL; | |
1da177e4 | 1377 | return clp; |
d15c077e | 1378 | } |
1da177e4 LT |
1379 | } |
1380 | return NULL; | |
1381 | } | |
1382 | ||
6e5f15c9 | 1383 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1384 | { |
6e5f15c9 | 1385 | return clp->cl_exchange_flags != 0; |
e203d506 | 1386 | } |
a1bcecd2 | 1387 | |
28ce6054 | 1388 | static struct nfs4_client * |
e203d506 | 1389 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1390 | { |
1391 | struct nfs4_client *clp; | |
1392 | ||
1393 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1394 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1395 | return clp; |
1396 | } | |
1397 | return NULL; | |
1398 | } | |
1399 | ||
1400 | static struct nfs4_client * | |
e203d506 | 1401 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1402 | { |
1403 | struct nfs4_client *clp; | |
1404 | ||
1405 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1406 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1407 | return clp; |
1408 | } | |
1409 | return NULL; | |
1410 | } | |
1411 | ||
fd39ca9a | 1412 | static void |
6f3d772f | 1413 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1414 | { |
07263f1e | 1415 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1416 | struct sockaddr *sa = svc_addr(rqstp); |
1417 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1418 | unsigned short expected_family; |
1419 | ||
1420 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1421 | if (se->se_callback_netid_len == 3 && | |
1422 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1423 | expected_family = AF_INET; | |
1424 | else if (se->se_callback_netid_len == 4 && | |
1425 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1426 | expected_family = AF_INET6; | |
1427 | else | |
1da177e4 LT |
1428 | goto out_err; |
1429 | ||
f2ac4dc9 | 1430 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1431 | se->se_callback_addr_len, |
07263f1e BF |
1432 | (struct sockaddr *)&conn->cb_addr, |
1433 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1434 | |
07263f1e | 1435 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1436 | goto out_err; |
aa9a4ec7 | 1437 | |
07263f1e BF |
1438 | if (conn->cb_addr.ss_family == AF_INET6) |
1439 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1440 | |
07263f1e BF |
1441 | conn->cb_prog = se->se_callback_prog; |
1442 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1443 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1444 | return; |
1445 | out_err: | |
07263f1e BF |
1446 | conn->cb_addr.ss_family = AF_UNSPEC; |
1447 | conn->cb_addrlen = 0; | |
849823c5 | 1448 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1449 | "will not receive delegations\n", |
1450 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1451 | ||
1da177e4 LT |
1452 | return; |
1453 | } | |
1454 | ||
074fe897 | 1455 | /* |
557ce264 | 1456 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1457 | */ |
074fe897 AA |
1458 | void |
1459 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1460 | { |
557ce264 AA |
1461 | struct nfsd4_slot *slot = resp->cstate.slot; |
1462 | unsigned int base; | |
074fe897 | 1463 | |
557ce264 | 1464 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1465 | |
557ce264 AA |
1466 | slot->sl_opcnt = resp->opcnt; |
1467 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1468 | |
bf5c43c8 | 1469 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1470 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1471 | slot->sl_datalen = 0; |
bf864a31 | 1472 | return; |
074fe897 | 1473 | } |
557ce264 AA |
1474 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1475 | base = (char *)resp->cstate.datap - | |
1476 | (char *)resp->xbuf->head[0].iov_base; | |
1477 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1478 | slot->sl_datalen)) | |
1479 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1480 | return; | |
074fe897 AA |
1481 | } |
1482 | ||
1483 | /* | |
abfabf8c AA |
1484 | * Encode the replay sequence operation from the slot values. |
1485 | * If cachethis is FALSE encode the uncached rep error on the next | |
1486 | * operation which sets resp->p and increments resp->opcnt for | |
1487 | * nfs4svc_encode_compoundres. | |
074fe897 | 1488 | * |
074fe897 | 1489 | */ |
abfabf8c AA |
1490 | static __be32 |
1491 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1492 | struct nfsd4_compoundres *resp) | |
074fe897 | 1493 | { |
abfabf8c AA |
1494 | struct nfsd4_op *op; |
1495 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1496 | |
abfabf8c AA |
1497 | /* Encode the replayed sequence operation */ |
1498 | op = &args->ops[resp->opcnt - 1]; | |
1499 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1500 | |
abfabf8c | 1501 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1502 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1503 | op = &args->ops[resp->opcnt++]; |
1504 | op->status = nfserr_retry_uncached_rep; | |
1505 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1506 | } |
abfabf8c | 1507 | return op->status; |
074fe897 AA |
1508 | } |
1509 | ||
1510 | /* | |
557ce264 AA |
1511 | * The sequence operation is not cached because we can use the slot and |
1512 | * session values. | |
074fe897 AA |
1513 | */ |
1514 | __be32 | |
bf864a31 AA |
1515 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1516 | struct nfsd4_sequence *seq) | |
074fe897 | 1517 | { |
557ce264 | 1518 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1519 | __be32 status; |
1520 | ||
557ce264 | 1521 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1522 | |
abfabf8c AA |
1523 | /* Either returns 0 or nfserr_retry_uncached */ |
1524 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1525 | if (status == nfserr_retry_uncached_rep) | |
1526 | return status; | |
074fe897 | 1527 | |
557ce264 AA |
1528 | /* The sequence operation has been encoded, cstate->datap set. */ |
1529 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1530 | |
557ce264 AA |
1531 | resp->opcnt = slot->sl_opcnt; |
1532 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1533 | status = slot->sl_status; | |
074fe897 AA |
1534 | |
1535 | return status; | |
1536 | } | |
1537 | ||
0733d213 AA |
1538 | /* |
1539 | * Set the exchange_id flags returned by the server. | |
1540 | */ | |
1541 | static void | |
1542 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1543 | { | |
1544 | /* pNFS is not supported */ | |
1545 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1546 | ||
1547 | /* Referrals are supported, Migration is not. */ | |
1548 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1549 | ||
1550 | /* set the wire flags to return to client. */ | |
1551 | clid->flags = new->cl_exchange_flags; | |
1552 | } | |
1553 | ||
631fc9ea BF |
1554 | static bool client_has_state(struct nfs4_client *clp) |
1555 | { | |
1556 | /* | |
1557 | * Note clp->cl_openowners check isn't quite right: there's no | |
1558 | * need to count owners without stateid's. | |
1559 | * | |
1560 | * Also note we should probably be using this in 4.0 case too. | |
1561 | */ | |
6eccece9 BF |
1562 | return !list_empty(&clp->cl_openowners) |
1563 | || !list_empty(&clp->cl_delegations) | |
1564 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1565 | } |
1566 | ||
069b6ad4 AA |
1567 | __be32 |
1568 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1569 | struct nfsd4_compound_state *cstate, | |
1570 | struct nfsd4_exchange_id *exid) | |
1571 | { | |
0733d213 | 1572 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1573 | __be32 status; |
0733d213 AA |
1574 | unsigned int strhashval; |
1575 | char dname[HEXDIR_LEN]; | |
363168b4 | 1576 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1577 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1578 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1579 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1580 | |
363168b4 | 1581 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1582 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1583 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1584 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1585 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1586 | |
a084daf5 | 1587 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1588 | return nfserr_inval; |
1589 | ||
1590 | /* Currently only support SP4_NONE */ | |
1591 | switch (exid->spa_how) { | |
1592 | case SP4_NONE: | |
1593 | break; | |
1594 | case SP4_SSV: | |
044bc1d4 | 1595 | return nfserr_serverfault; |
0733d213 AA |
1596 | default: |
1597 | BUG(); /* checked by xdr code */ | |
1598 | case SP4_MACH_CRED: | |
1599 | return nfserr_serverfault; /* no excuse :-/ */ | |
1600 | } | |
1601 | ||
1602 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1603 | ||
1604 | if (status) | |
2786cc3a | 1605 | return status; |
0733d213 AA |
1606 | |
1607 | strhashval = clientstr_hashval(dname); | |
1608 | ||
2dbb269d | 1609 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1610 | nfs4_lock_state(); |
e203d506 | 1611 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1612 | if (conf) { |
83e08fd4 BF |
1613 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1614 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1615 | ||
136e658d BF |
1616 | if (update) { |
1617 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1618 | status = nfserr_inval; |
1a308118 BF |
1619 | goto out; |
1620 | } | |
136e658d | 1621 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1622 | status = nfserr_perm; |
136e658d BF |
1623 | goto out; |
1624 | } | |
1625 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1626 | status = nfserr_not_same; |
1627 | goto out; | |
1628 | } | |
136e658d BF |
1629 | /* case 6 */ |
1630 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1631 | new = conf; | |
1632 | goto out_copy; | |
0733d213 | 1633 | } |
136e658d | 1634 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1635 | if (client_has_state(conf)) { |
1636 | status = nfserr_clid_inuse; | |
0733d213 AA |
1637 | goto out; |
1638 | } | |
1639 | expire_client(conf); | |
1640 | goto out_new; | |
1641 | } | |
136e658d | 1642 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1643 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1644 | new = conf; |
1645 | goto out_copy; | |
1646 | } | |
1647 | /* case 5, client reboot */ | |
136e658d | 1648 | goto out_new; |
6ddbbbfe MS |
1649 | } |
1650 | ||
2dbb269d | 1651 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1652 | status = nfserr_noent; |
1653 | goto out; | |
0733d213 AA |
1654 | } |
1655 | ||
e203d506 | 1656 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
2dbb269d | 1657 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1658 | expire_client(unconf); |
0733d213 | 1659 | |
2dbb269d | 1660 | /* case 1 (normal case) */ |
0733d213 | 1661 | out_new: |
b09333c4 | 1662 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1663 | if (new == NULL) { |
4731030d | 1664 | status = nfserr_jukebox; |
0733d213 AA |
1665 | goto out; |
1666 | } | |
c116a0af | 1667 | new->cl_minorversion = 1; |
0733d213 | 1668 | |
0733d213 | 1669 | gen_clid(new); |
0733d213 AA |
1670 | add_to_unconfirmed(new, strhashval); |
1671 | out_copy: | |
1672 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1673 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1674 | ||
778df3f0 | 1675 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1676 | nfsd4_set_ex_flags(new, exid); |
1677 | ||
1678 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1679 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1680 | status = nfs_ok; |
1681 | ||
1682 | out: | |
1683 | nfs4_unlock_state(); | |
0733d213 | 1684 | return status; |
069b6ad4 AA |
1685 | } |
1686 | ||
57b7b43b | 1687 | static __be32 |
88e588d5 | 1688 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1689 | { |
88e588d5 AA |
1690 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1691 | slot_seqid); | |
b85d4c01 BH |
1692 | |
1693 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1694 | if (slot_inuse) { |
1695 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1696 | return nfserr_jukebox; |
1697 | else | |
1698 | return nfserr_seq_misordered; | |
1699 | } | |
f6d82485 | 1700 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1701 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1702 | return nfs_ok; |
88e588d5 | 1703 | if (seqid == slot_seqid) |
b85d4c01 | 1704 | return nfserr_replay_cache; |
b85d4c01 BH |
1705 | return nfserr_seq_misordered; |
1706 | } | |
1707 | ||
49557cc7 AA |
1708 | /* |
1709 | * Cache the create session result into the create session single DRC | |
1710 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1711 | * Do this for solo or embedded create session operations. | |
1712 | */ | |
1713 | static void | |
1714 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1715 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1716 | { |
1717 | slot->sl_status = nfserr; | |
1718 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1719 | } | |
1720 | ||
1721 | static __be32 | |
1722 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1723 | struct nfsd4_clid_slot *slot) | |
1724 | { | |
1725 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1726 | return slot->sl_status; | |
1727 | } | |
1728 | ||
1b74c25b MJ |
1729 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1730 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1731 | 1 + /* MIN tag is length with zero, only length */ \ | |
1732 | 3 + /* version, opcount, opcode */ \ | |
1733 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1734 | /* seqid, slotID, slotID, cache */ \ | |
1735 | 4 ) * sizeof(__be32)) | |
1736 | ||
1737 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1738 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1739 | 1 + /* status */ \ | |
1740 | 1 + /* MIN tag is length with zero, only length */ \ | |
1741 | 3 + /* opcount, opcode, opstatus*/ \ | |
1742 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1743 | /* seqid, slotID, slotID, slotID, status */ \ | |
1744 | 5 ) * sizeof(__be32)) | |
1745 | ||
57b7b43b | 1746 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1747 | { |
1748 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1749 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1750 | } | |
1751 | ||
069b6ad4 AA |
1752 | __be32 |
1753 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1754 | struct nfsd4_compound_state *cstate, | |
1755 | struct nfsd4_create_session *cr_ses) | |
1756 | { | |
363168b4 | 1757 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1758 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1759 | struct nfsd4_session *new; |
81f0b2a4 | 1760 | struct nfsd4_conn *conn; |
49557cc7 | 1761 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1762 | __be32 status = 0; |
ec6b5d7b | 1763 | |
a62573dc MJ |
1764 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1765 | return nfserr_inval; | |
49730501 BF |
1766 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1767 | return nfserr_toosmall; | |
81f0b2a4 BF |
1768 | new = alloc_session(&cr_ses->fore_channel); |
1769 | if (!new) | |
1770 | return nfserr_jukebox; | |
1771 | status = nfserr_jukebox; | |
1772 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1773 | if (!conn) | |
1774 | goto out_free_session; | |
a62573dc | 1775 | |
ec6b5d7b | 1776 | nfs4_lock_state(); |
d15c077e BF |
1777 | unconf = find_unconfirmed_client(&cr_ses->clientid, true); |
1778 | conf = find_confirmed_client(&cr_ses->clientid, true); | |
ec6b5d7b AA |
1779 | |
1780 | if (conf) { | |
49557cc7 AA |
1781 | cs_slot = &conf->cl_cs_slot; |
1782 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1783 | if (status == nfserr_replay_cache) { |
49557cc7 | 1784 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1785 | goto out_free_conn; |
49557cc7 | 1786 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1787 | status = nfserr_seq_misordered; |
81f0b2a4 | 1788 | goto out_free_conn; |
ec6b5d7b | 1789 | } |
ec6b5d7b | 1790 | } else if (unconf) { |
8f9d3d3b BF |
1791 | unsigned int hash; |
1792 | struct nfs4_client *old; | |
ec6b5d7b | 1793 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1794 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1795 | status = nfserr_clid_inuse; |
81f0b2a4 | 1796 | goto out_free_conn; |
ec6b5d7b | 1797 | } |
49557cc7 AA |
1798 | cs_slot = &unconf->cl_cs_slot; |
1799 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1800 | if (status) { |
1801 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1802 | status = nfserr_seq_misordered; |
81f0b2a4 | 1803 | goto out_free_conn; |
ec6b5d7b | 1804 | } |
8f9d3d3b BF |
1805 | hash = clientstr_hashval(unconf->cl_recdir); |
1806 | old = find_confirmed_client_by_str(unconf->cl_recdir, hash); | |
1807 | if (old) | |
1808 | expire_client(old); | |
1809 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1810 | conf = unconf; |
1811 | } else { | |
1812 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1813 | goto out_free_conn; |
ec6b5d7b | 1814 | } |
81f0b2a4 | 1815 | status = nfs_ok; |
408b79bc BF |
1816 | /* |
1817 | * We do not support RDMA or persistent sessions | |
1818 | */ | |
1819 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1820 | cr_ses->flags &= ~SESSION4_RDMA; | |
1821 | ||
81f0b2a4 BF |
1822 | init_session(rqstp, new, conf, cr_ses); |
1823 | nfsd4_init_conn(rqstp, conn, new); | |
1824 | ||
ac7c46f2 | 1825 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1826 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1827 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1828 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1829 | cs_slot->sl_seqid++; |
49557cc7 | 1830 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1831 | |
49557cc7 AA |
1832 | /* cache solo and embedded create sessions under the state lock */ |
1833 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1834 | out: |
1835 | nfs4_unlock_state(); | |
1836 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1837 | return status; | |
81f0b2a4 BF |
1838 | out_free_conn: |
1839 | free_conn(conn); | |
1840 | out_free_session: | |
1841 | __free_session(new); | |
1842 | goto out; | |
069b6ad4 AA |
1843 | } |
1844 | ||
57716355 BF |
1845 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1846 | { | |
1847 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1848 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1849 | ||
1850 | return argp->opcnt == resp->opcnt; | |
1851 | } | |
1852 | ||
1d1bc8f2 BF |
1853 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1854 | { | |
1855 | switch (*dir) { | |
1856 | case NFS4_CDFC4_FORE: | |
1857 | case NFS4_CDFC4_BACK: | |
1858 | return nfs_ok; | |
1859 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1860 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1861 | *dir = NFS4_CDFC4_BOTH; | |
1862 | return nfs_ok; | |
1863 | }; | |
1864 | return nfserr_inval; | |
1865 | } | |
1866 | ||
1867 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1868 | struct nfsd4_compound_state *cstate, | |
1869 | struct nfsd4_bind_conn_to_session *bcts) | |
1870 | { | |
1871 | __be32 status; | |
3ba63671 | 1872 | struct nfsd4_conn *conn; |
1d1bc8f2 BF |
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); | |
3ba63671 BF |
1889 | if (status) |
1890 | return status; | |
1891 | conn = alloc_conn(rqstp, bcts->dir); | |
1892 | if (!conn) | |
1893 | return nfserr_jukebox; | |
e1ff371f | 1894 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1895 | return nfs_ok; |
1d1bc8f2 BF |
1896 | } |
1897 | ||
5d4cec2f BF |
1898 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1899 | { | |
1900 | if (!session) | |
1901 | return 0; | |
1902 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1903 | } | |
1904 | ||
069b6ad4 AA |
1905 | __be32 |
1906 | nfsd4_destroy_session(struct svc_rqst *r, | |
1907 | struct nfsd4_compound_state *cstate, | |
1908 | struct nfsd4_destroy_session *sessionid) | |
1909 | { | |
e10e0cfc | 1910 | struct nfsd4_session *ses; |
57b7b43b | 1911 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1912 | |
1913 | /* Notes: | |
1914 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1915 | * - Should we return nfserr_back_chan_busy if waiting for | |
1916 | * callbacks on to-be-destroyed session? | |
1917 | * - Do we need to clear any callback info from previous session? | |
1918 | */ | |
1919 | ||
5d4cec2f | 1920 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1921 | if (!nfsd4_last_compound_op(r)) |
1922 | return nfserr_not_only_op; | |
1923 | } | |
e10e0cfc | 1924 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1925 | spin_lock(&client_lock); |
e10e0cfc BH |
1926 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1927 | if (!ses) { | |
9089f1b4 | 1928 | spin_unlock(&client_lock); |
e10e0cfc BH |
1929 | goto out; |
1930 | } | |
1931 | ||
1932 | unhash_session(ses); | |
9089f1b4 | 1933 | spin_unlock(&client_lock); |
e10e0cfc | 1934 | |
ab707e15 | 1935 | nfs4_lock_state(); |
84f5f7cc | 1936 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1937 | nfs4_unlock_state(); |
19cf5c02 | 1938 | |
508dc6e1 | 1939 | spin_lock(&client_lock); |
19cf5c02 | 1940 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1941 | nfsd4_put_session_locked(ses); |
1942 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1943 | status = nfs_ok; |
1944 | out: | |
1945 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1946 | return status; | |
069b6ad4 AA |
1947 | } |
1948 | ||
a663bdd8 | 1949 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1950 | { |
1951 | struct nfsd4_conn *c; | |
1952 | ||
1953 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1954 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1955 | return c; |
1956 | } | |
1957 | } | |
1958 | return NULL; | |
1959 | } | |
1960 | ||
a663bdd8 | 1961 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1962 | { |
1963 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1964 | struct nfsd4_conn *c; |
21b75b01 | 1965 | int ret; |
328ead28 BF |
1966 | |
1967 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1968 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1969 | if (c) { |
1970 | spin_unlock(&clp->cl_lock); | |
1971 | free_conn(new); | |
1972 | return; | |
1973 | } | |
1974 | __nfsd4_hash_conn(new, ses); | |
1975 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1976 | ret = nfsd4_register_conn(new); |
1977 | if (ret) | |
1978 | /* oops; xprt is already down: */ | |
1979 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1980 | return; |
1981 | } | |
1982 | ||
868b89c3 MJ |
1983 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1984 | { | |
1985 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1986 | ||
1987 | return args->opcnt > session->se_fchannel.maxops; | |
1988 | } | |
1989 | ||
ae82a8d0 MJ |
1990 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1991 | struct nfsd4_session *session) | |
1992 | { | |
1993 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1994 | ||
1995 | return xb->len > session->se_fchannel.maxreq_sz; | |
1996 | } | |
1997 | ||
069b6ad4 | 1998 | __be32 |
b85d4c01 | 1999 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2000 | struct nfsd4_compound_state *cstate, |
2001 | struct nfsd4_sequence *seq) | |
2002 | { | |
f9bb94c4 | 2003 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2004 | struct nfsd4_session *session; |
2005 | struct nfsd4_slot *slot; | |
a663bdd8 | 2006 | struct nfsd4_conn *conn; |
57b7b43b | 2007 | __be32 status; |
b85d4c01 | 2008 | |
f9bb94c4 AA |
2009 | if (resp->opcnt != 1) |
2010 | return nfserr_sequence_pos; | |
2011 | ||
a663bdd8 BF |
2012 | /* |
2013 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2014 | * below. | |
2015 | */ | |
2016 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2017 | if (!conn) | |
2018 | return nfserr_jukebox; | |
2019 | ||
9089f1b4 | 2020 | spin_lock(&client_lock); |
b85d4c01 BH |
2021 | status = nfserr_badsession; |
2022 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
2023 | if (!session) | |
2024 | goto out; | |
2025 | ||
868b89c3 MJ |
2026 | status = nfserr_too_many_ops; |
2027 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2028 | goto out; | |
2029 | ||
ae82a8d0 MJ |
2030 | status = nfserr_req_too_big; |
2031 | if (nfsd4_request_too_big(rqstp, session)) | |
2032 | goto out; | |
2033 | ||
b85d4c01 | 2034 | status = nfserr_badslot; |
6c18ba9f | 2035 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2036 | goto out; |
2037 | ||
557ce264 | 2038 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2039 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2040 | ||
a8dfdaeb AA |
2041 | /* We do not negotiate the number of slots yet, so set the |
2042 | * maxslots to the session maxreqs which is used to encode | |
2043 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2044 | seq->maxslots = session->se_fchannel.maxreqs; | |
2045 | ||
73e79482 BF |
2046 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2047 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2048 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2049 | status = nfserr_seq_misordered; |
2050 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2051 | goto out; | |
b85d4c01 BH |
2052 | cstate->slot = slot; |
2053 | cstate->session = session; | |
da3846a2 | 2054 | /* Return the cached reply status and set cstate->status |
557ce264 | 2055 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2056 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2057 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2058 | goto out; |
b85d4c01 BH |
2059 | } |
2060 | if (status) | |
2061 | goto out; | |
2062 | ||
a663bdd8 BF |
2063 | nfsd4_sequence_check_conn(conn, session); |
2064 | conn = NULL; | |
328ead28 | 2065 | |
b85d4c01 | 2066 | /* Success! bump slot seqid */ |
b85d4c01 | 2067 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2068 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2069 | if (seq->cachethis) |
2070 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2071 | else |
2072 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2073 | |
2074 | cstate->slot = slot; | |
2075 | cstate->session = session; | |
2076 | ||
b85d4c01 | 2077 | out: |
26c0c75e | 2078 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2079 | if (cstate->session) { |
0d7bb719 BF |
2080 | struct nfs4_client *clp = session->se_client; |
2081 | ||
36acb66b | 2082 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2083 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2084 | switch (clp->cl_cb_state) { |
2085 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2086 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2087 | break; |
2088 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2089 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2090 | break; |
fc0c3dd1 BH |
2091 | default: |
2092 | seq->status_flags = 0; | |
5423732a | 2093 | } |
aaf84eb9 | 2094 | } |
a663bdd8 | 2095 | kfree(conn); |
36acb66b | 2096 | spin_unlock(&client_lock); |
b85d4c01 BH |
2097 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2098 | return status; | |
069b6ad4 AA |
2099 | } |
2100 | ||
345c2842 MJ |
2101 | __be32 |
2102 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2103 | { | |
2104 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2105 | __be32 status = 0; |
345c2842 MJ |
2106 | |
2107 | nfs4_lock_state(); | |
d15c077e BF |
2108 | unconf = find_unconfirmed_client(&dc->clientid, true); |
2109 | conf = find_confirmed_client(&dc->clientid, true); | |
345c2842 MJ |
2110 | |
2111 | if (conf) { | |
2112 | clp = conf; | |
2113 | ||
6eccece9 | 2114 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2115 | status = nfserr_clientid_busy; |
2116 | goto out; | |
2117 | } | |
2118 | ||
2119 | /* rfc5661 18.50.3 */ | |
2120 | if (cstate->session && conf == cstate->session->se_client) { | |
2121 | status = nfserr_clientid_busy; | |
2122 | goto out; | |
2123 | } | |
2124 | } else if (unconf) | |
2125 | clp = unconf; | |
2126 | else { | |
2127 | status = nfserr_stale_clientid; | |
2128 | goto out; | |
2129 | } | |
2130 | ||
2131 | expire_client(clp); | |
2132 | out: | |
2133 | nfs4_unlock_state(); | |
2134 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2135 | return status; | |
2136 | } | |
2137 | ||
4dc6ec00 BF |
2138 | __be32 |
2139 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2140 | { | |
57b7b43b | 2141 | __be32 status = 0; |
bcecf1cc | 2142 | |
4dc6ec00 BF |
2143 | if (rc->rca_one_fs) { |
2144 | if (!cstate->current_fh.fh_dentry) | |
2145 | return nfserr_nofilehandle; | |
2146 | /* | |
2147 | * We don't take advantage of the rca_one_fs case. | |
2148 | * That's OK, it's optional, we can safely ignore it. | |
2149 | */ | |
2150 | return nfs_ok; | |
2151 | } | |
bcecf1cc | 2152 | |
4dc6ec00 | 2153 | nfs4_lock_state(); |
bcecf1cc | 2154 | status = nfserr_complete_already; |
a52d726b JL |
2155 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2156 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2157 | goto out; |
2158 | ||
2159 | status = nfserr_stale_clientid; | |
2160 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2161 | /* |
2162 | * The following error isn't really legal. | |
2163 | * But we only get here if the client just explicitly | |
2164 | * destroyed the client. Surely it no longer cares what | |
2165 | * error it gets back on an operation for the dead | |
2166 | * client. | |
2167 | */ | |
bcecf1cc MJ |
2168 | goto out; |
2169 | ||
2170 | status = nfs_ok; | |
2a4317c5 | 2171 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2172 | out: |
4dc6ec00 | 2173 | nfs4_unlock_state(); |
bcecf1cc | 2174 | return status; |
4dc6ec00 BF |
2175 | } |
2176 | ||
b37ad28b | 2177 | __be32 |
b591480b BF |
2178 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2179 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2180 | { |
a084daf5 | 2181 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2182 | nfs4_verifier clverifier = setclid->se_verf; |
2183 | unsigned int strhashval; | |
28ce6054 | 2184 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2185 | __be32 status; |
a55370a3 | 2186 | char dname[HEXDIR_LEN]; |
1da177e4 | 2187 | |
a55370a3 N |
2188 | status = nfs4_make_rec_clidname(dname, &clname); |
2189 | if (status) | |
73aea4ec | 2190 | return status; |
a55370a3 | 2191 | |
a55370a3 | 2192 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2193 | |
63db4632 | 2194 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2195 | nfs4_lock_state(); |
e203d506 | 2196 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2197 | if (conf) { |
63db4632 | 2198 | /* case 0: */ |
1da177e4 | 2199 | status = nfserr_clid_inuse; |
e203d506 BF |
2200 | if (clp_used_exchangeid(conf)) |
2201 | goto out; | |
026722c2 | 2202 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2203 | char addr_str[INET6_ADDRSTRLEN]; |
2204 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2205 | sizeof(addr_str)); | |
2206 | dprintk("NFSD: setclientid: string in use by client " | |
2207 | "at %s\n", addr_str); | |
1da177e4 LT |
2208 | goto out; |
2209 | } | |
1da177e4 | 2210 | } |
e203d506 | 2211 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
8f930711 BF |
2212 | if (unconf) |
2213 | expire_client(unconf); | |
3e772463 | 2214 | status = nfserr_jukebox; |
8f930711 BF |
2215 | new = create_client(clname, dname, rqstp, &clverifier); |
2216 | if (new == NULL) | |
2217 | goto out; | |
34b232bb | 2218 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2219 | /* case 1: probable callback update */ |
1da177e4 | 2220 | copy_clid(new, conf); |
34b232bb | 2221 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
1da177e4 | 2222 | gen_clid(new); |
8323c3b2 | 2223 | new->cl_minorversion = 0; |
6f3d772f | 2224 | gen_callback(new, setclid, rqstp); |
c175b83c | 2225 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2226 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2227 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2228 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2229 | status = nfs_ok; | |
2230 | out: | |
2231 | nfs4_unlock_state(); | |
2232 | return status; | |
2233 | } | |
2234 | ||
2235 | ||
b37ad28b | 2236 | __be32 |
b591480b BF |
2237 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2238 | struct nfsd4_compound_state *cstate, | |
2239 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2240 | { |
21ab45a4 | 2241 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2242 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2243 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2244 | __be32 status; |
2c142baa | 2245 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2246 | |
2c142baa | 2247 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2248 | return nfserr_stale_clientid; |
1da177e4 | 2249 | nfs4_lock_state(); |
21ab45a4 | 2250 | |
d15c077e BF |
2251 | conf = find_confirmed_client(clid, false); |
2252 | unconf = find_unconfirmed_client(clid, false); | |
a186e767 | 2253 | /* |
8695b90a BF |
2254 | * We try hard to give out unique clientid's, so if we get an |
2255 | * attempt to confirm the same clientid with a different cred, | |
2256 | * there's a bug somewhere. Let's charitably assume it's our | |
2257 | * bug. | |
a186e767 | 2258 | */ |
8695b90a BF |
2259 | status = nfserr_serverfault; |
2260 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2261 | goto out; | |
2262 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2263 | goto out; | |
63db4632 | 2264 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2265 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2266 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2267 | status = nfs_ok; |
90d700b7 BF |
2268 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2269 | status = nfserr_stale_clientid; | |
2270 | goto out; | |
2271 | } | |
2272 | status = nfs_ok; | |
2273 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2274 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2275 | nfsd4_probe_callback(conf); | |
2276 | expire_client(unconf); | |
90d700b7 | 2277 | } else { /* case 3: normal case; new or rebooted client */ |
8695b90a | 2278 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); |
1a69c179 | 2279 | |
8695b90a | 2280 | conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); |
0d22f68f | 2281 | if (conf) |
8695b90a | 2282 | expire_client(conf); |
8695b90a | 2283 | move_to_confirmed(unconf); |
f3d03b92 | 2284 | nfsd4_probe_callback(unconf); |
08e8987c | 2285 | } |
1da177e4 | 2286 | out: |
1da177e4 LT |
2287 | nfs4_unlock_state(); |
2288 | return status; | |
2289 | } | |
2290 | ||
32513b40 BF |
2291 | static struct nfs4_file *nfsd4_alloc_file(void) |
2292 | { | |
2293 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2294 | } | |
2295 | ||
1da177e4 | 2296 | /* OPEN Share state helper functions */ |
32513b40 | 2297 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2298 | { |
1da177e4 LT |
2299 | unsigned int hashval = file_hashval(ino); |
2300 | ||
32513b40 BF |
2301 | atomic_set(&fp->fi_ref, 1); |
2302 | INIT_LIST_HEAD(&fp->fi_hash); | |
2303 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2304 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2305 | fp->fi_inode = igrab(ino); | |
2306 | fp->fi_had_conflict = false; | |
2307 | fp->fi_lease = NULL; | |
2308 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2309 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2310 | spin_lock(&recall_lock); | |
2311 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2312 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2313 | } |
2314 | ||
e60d4398 | 2315 | static void |
e18b890b | 2316 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2317 | { |
e60d4398 N |
2318 | if (*slab == NULL) |
2319 | return; | |
1a1d92c1 | 2320 | kmem_cache_destroy(*slab); |
e60d4398 | 2321 | *slab = NULL; |
1da177e4 LT |
2322 | } |
2323 | ||
e8ff2a84 | 2324 | void |
1da177e4 LT |
2325 | nfsd4_free_slabs(void) |
2326 | { | |
fe0750e5 BF |
2327 | nfsd4_free_slab(&openowner_slab); |
2328 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2329 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2330 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2331 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2332 | } |
1da177e4 | 2333 | |
72083396 | 2334 | int |
e60d4398 N |
2335 | nfsd4_init_slabs(void) |
2336 | { | |
fe0750e5 BF |
2337 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2338 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2339 | if (openowner_slab == NULL) | |
2340 | goto out_nomem; | |
2341 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2342 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2343 | if (lockowner_slab == NULL) |
e60d4398 N |
2344 | goto out_nomem; |
2345 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2346 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2347 | if (file_slab == NULL) |
2348 | goto out_nomem; | |
5ac049ac | 2349 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2350 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2351 | if (stateid_slab == NULL) |
2352 | goto out_nomem; | |
5b2d21c1 | 2353 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2354 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2355 | if (deleg_slab == NULL) |
2356 | goto out_nomem; | |
e60d4398 N |
2357 | return 0; |
2358 | out_nomem: | |
2359 | nfsd4_free_slabs(); | |
2360 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2361 | return -ENOMEM; | |
1da177e4 LT |
2362 | } |
2363 | ||
fe0750e5 BF |
2364 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2365 | { | |
2366 | kfree(oo->oo_owner.so_owner.data); | |
2367 | kmem_cache_free(openowner_slab, oo); | |
2368 | } | |
2369 | ||
2370 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2371 | { |
fe0750e5 BF |
2372 | kfree(lo->lo_owner.so_owner.data); |
2373 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2374 | } |
2375 | ||
ff194bd9 | 2376 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2377 | { |
ff194bd9 BF |
2378 | rp->rp_status = nfserr_serverfault; |
2379 | rp->rp_buflen = 0; | |
2380 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2381 | } |
2382 | ||
fe0750e5 | 2383 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2384 | { |
1da177e4 | 2385 | struct nfs4_stateowner *sop; |
1da177e4 | 2386 | |
fe0750e5 | 2387 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2388 | if (!sop) |
2389 | return NULL; | |
2390 | ||
2391 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2392 | if (!sop->so_owner.data) { | |
fe0750e5 | 2393 | kmem_cache_free(slab, sop); |
1da177e4 | 2394 | return NULL; |
ff194bd9 BF |
2395 | } |
2396 | sop->so_owner.len = owner->len; | |
2397 | ||
ea1da636 | 2398 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2399 | sop->so_client = clp; |
2400 | init_nfs4_replay(&sop->so_replay); | |
2401 | return sop; | |
2402 | } | |
2403 | ||
fe0750e5 | 2404 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2405 | { |
16bfdaaf | 2406 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2407 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2408 | } |
2409 | ||
fe0750e5 | 2410 | static struct nfs4_openowner * |
ff194bd9 | 2411 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2412 | struct nfs4_openowner *oo; |
ff194bd9 | 2413 | |
fe0750e5 BF |
2414 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2415 | if (!oo) | |
ff194bd9 | 2416 | return NULL; |
fe0750e5 BF |
2417 | oo->oo_owner.so_is_open_owner = 1; |
2418 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2419 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2420 | oo->oo_time = 0; |
38c387b5 | 2421 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2422 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2423 | hash_openowner(oo, clp, strhashval); | |
2424 | return oo; | |
1da177e4 LT |
2425 | } |
2426 | ||
996e0938 | 2427 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2428 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2429 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2430 | |
996e0938 | 2431 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2432 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2433 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2434 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2435 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2436 | get_nfs4_file(fp); |
1da177e4 | 2437 | stp->st_file = fp; |
1da177e4 LT |
2438 | stp->st_access_bmap = 0; |
2439 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2440 | set_access(open->op_share_access, stp); |
ce0fc43c | 2441 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2442 | stp->st_openstp = NULL; |
1da177e4 LT |
2443 | } |
2444 | ||
fd39ca9a | 2445 | static void |
fe0750e5 | 2446 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2447 | { |
fe0750e5 | 2448 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2449 | |
fe0750e5 BF |
2450 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2451 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2452 | } |
2453 | ||
1da177e4 | 2454 | static int |
599e0a22 BF |
2455 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2456 | clientid_t *clid) | |
2457 | { | |
2458 | return (sop->so_owner.len == owner->len) && | |
2459 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2460 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2461 | } |
2462 | ||
fe0750e5 | 2463 | static struct nfs4_openowner * |
d15c077e | 2464 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) |
1da177e4 | 2465 | { |
a50d2ad1 BF |
2466 | struct nfs4_stateowner *so; |
2467 | struct nfs4_openowner *oo; | |
d15c077e | 2468 | struct nfs4_client *clp; |
1da177e4 | 2469 | |
16bfdaaf BF |
2470 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2471 | if (!so->so_is_open_owner) | |
2472 | continue; | |
a50d2ad1 BF |
2473 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2474 | oo = openowner(so); | |
d15c077e BF |
2475 | clp = oo->oo_owner.so_client; |
2476 | if ((bool)clp->cl_minorversion != sessions) | |
2477 | return NULL; | |
a50d2ad1 BF |
2478 | renew_client(oo->oo_owner.so_client); |
2479 | return oo; | |
2480 | } | |
1da177e4 LT |
2481 | } |
2482 | return NULL; | |
2483 | } | |
2484 | ||
2485 | /* search file_hashtbl[] for file */ | |
2486 | static struct nfs4_file * | |
2487 | find_file(struct inode *ino) | |
2488 | { | |
2489 | unsigned int hashval = file_hashval(ino); | |
2490 | struct nfs4_file *fp; | |
2491 | ||
8b671b80 | 2492 | spin_lock(&recall_lock); |
1da177e4 | 2493 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2494 | if (fp->fi_inode == ino) { |
2495 | get_nfs4_file(fp); | |
8b671b80 | 2496 | spin_unlock(&recall_lock); |
1da177e4 | 2497 | return fp; |
13cd2184 | 2498 | } |
1da177e4 | 2499 | } |
8b671b80 | 2500 | spin_unlock(&recall_lock); |
1da177e4 LT |
2501 | return NULL; |
2502 | } | |
2503 | ||
1da177e4 LT |
2504 | /* |
2505 | * Called to check deny when READ with all zero stateid or | |
2506 | * WRITE with all zero or all one stateid | |
2507 | */ | |
b37ad28b | 2508 | static __be32 |
1da177e4 LT |
2509 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2510 | { | |
2511 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2512 | struct nfs4_file *fp; | |
dcef0413 | 2513 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2514 | __be32 ret; |
1da177e4 LT |
2515 | |
2516 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2517 | ||
2518 | fp = find_file(ino); | |
13cd2184 N |
2519 | if (!fp) |
2520 | return nfs_ok; | |
b700949b | 2521 | ret = nfserr_locked; |
1da177e4 | 2522 | /* Search for conflicting share reservations */ |
13cd2184 | 2523 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2524 | if (test_deny(deny_type, stp) || |
2525 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2526 | goto out; |
1da177e4 | 2527 | } |
13cd2184 N |
2528 | ret = nfs_ok; |
2529 | out: | |
2530 | put_nfs4_file(fp); | |
2531 | return ret; | |
1da177e4 LT |
2532 | } |
2533 | ||
6b57d9c8 | 2534 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2535 | { |
1da177e4 LT |
2536 | /* We're assuming the state code never drops its reference |
2537 | * without first removing the lease. Since we're in this lease | |
2538 | * callback (and since the lease code is serialized by the kernel | |
2539 | * lock) we know the server hasn't removed the lease yet, we know | |
2540 | * it's safe to take a reference: */ | |
2541 | atomic_inc(&dp->dl_count); | |
2542 | ||
1da177e4 | 2543 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2544 | |
460781b5 | 2545 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2546 | dp->dl_time = get_seconds(); |
2547 | ||
6b57d9c8 BF |
2548 | nfsd4_cb_recall(dp); |
2549 | } | |
2550 | ||
acfdf5c3 | 2551 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2552 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2553 | { | |
acfdf5c3 BF |
2554 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2555 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2556 | |
acfdf5c3 BF |
2557 | BUG_ON(!fp); |
2558 | /* We assume break_lease is only called once per lease: */ | |
2559 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2560 | /* |
2561 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2562 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2563 | * in time: |
0272e1fd BF |
2564 | */ |
2565 | fl->fl_break_time = 0; | |
1da177e4 | 2566 | |
5d926e8c | 2567 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2568 | fp->fi_had_conflict = true; |
2569 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2570 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2571 | spin_unlock(&recall_lock); |
1da177e4 LT |
2572 | } |
2573 | ||
1da177e4 LT |
2574 | static |
2575 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2576 | { | |
2577 | if (arg & F_UNLCK) | |
2578 | return lease_modify(onlist, arg); | |
2579 | else | |
2580 | return -EAGAIN; | |
2581 | } | |
2582 | ||
7b021967 | 2583 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2584 | .lm_break = nfsd_break_deleg_cb, |
2585 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2586 | }; |
2587 | ||
7a8711c9 BF |
2588 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2589 | { | |
2590 | if (nfsd4_has_session(cstate)) | |
2591 | return nfs_ok; | |
2592 | if (seqid == so->so_seqid - 1) | |
2593 | return nfserr_replay_me; | |
2594 | if (seqid == so->so_seqid) | |
2595 | return nfs_ok; | |
2596 | return nfserr_bad_seqid; | |
2597 | } | |
1da177e4 | 2598 | |
b37ad28b | 2599 | __be32 |
6668958f AA |
2600 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2601 | struct nfsd4_open *open) | |
1da177e4 | 2602 | { |
1da177e4 LT |
2603 | clientid_t *clientid = &open->op_clientid; |
2604 | struct nfs4_client *clp = NULL; | |
2605 | unsigned int strhashval; | |
fe0750e5 | 2606 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2607 | __be32 status; |
2c142baa | 2608 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2609 | |
2c142baa | 2610 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2611 | return nfserr_stale_clientid; |
32513b40 BF |
2612 | /* |
2613 | * In case we need it later, after we've already created the | |
2614 | * file and don't want to risk a further failure: | |
2615 | */ | |
2616 | open->op_file = nfsd4_alloc_file(); | |
2617 | if (open->op_file == NULL) | |
2618 | return nfserr_jukebox; | |
1da177e4 | 2619 | |
16bfdaaf | 2620 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
d15c077e | 2621 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion); |
fe0750e5 BF |
2622 | open->op_openowner = oo; |
2623 | if (!oo) { | |
d15c077e | 2624 | clp = find_confirmed_client(clientid, cstate->minorversion); |
1da177e4 | 2625 | if (clp == NULL) |
0f442aa2 | 2626 | return nfserr_expired; |
bcf130f9 | 2627 | goto new_owner; |
1da177e4 | 2628 | } |
dad1c067 | 2629 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2630 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2631 | clp = oo->oo_owner.so_client; |
2632 | release_openowner(oo); | |
2633 | open->op_openowner = NULL; | |
bcf130f9 | 2634 | goto new_owner; |
0f442aa2 | 2635 | } |
4cdc951b BF |
2636 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2637 | if (status) | |
2638 | return status; | |
2639 | clp = oo->oo_owner.so_client; | |
2640 | goto alloc_stateid; | |
bcf130f9 BF |
2641 | new_owner: |
2642 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2643 | if (oo == NULL) | |
2644 | return nfserr_jukebox; | |
2645 | open->op_openowner = oo; | |
4cdc951b BF |
2646 | alloc_stateid: |
2647 | open->op_stp = nfs4_alloc_stateid(clp); | |
2648 | if (!open->op_stp) | |
2649 | return nfserr_jukebox; | |
0f442aa2 | 2650 | return nfs_ok; |
1da177e4 LT |
2651 | } |
2652 | ||
b37ad28b | 2653 | static inline __be32 |
4a6e43e6 N |
2654 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2655 | { | |
2656 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2657 | return nfserr_openmode; | |
2658 | else | |
2659 | return nfs_ok; | |
2660 | } | |
2661 | ||
f459e453 | 2662 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2663 | { |
f459e453 | 2664 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2665 | } |
2666 | ||
38c2f4b1 | 2667 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2668 | { |
f459e453 | 2669 | struct nfs4_stid *ret; |
24a0111e | 2670 | |
38c2f4b1 | 2671 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2672 | if (!ret) |
2673 | return NULL; | |
2674 | return delegstateid(ret); | |
24a0111e BF |
2675 | } |
2676 | ||
8b289b2c BF |
2677 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2678 | { | |
2679 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2680 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2681 | } | |
2682 | ||
b37ad28b | 2683 | static __be32 |
38c2f4b1 | 2684 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2685 | struct nfs4_delegation **dp) |
2686 | { | |
2687 | int flags; | |
b37ad28b | 2688 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2689 | |
38c2f4b1 | 2690 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2691 | if (*dp == NULL) |
c44c5eeb | 2692 | goto out; |
24a0111e | 2693 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2694 | status = nfs4_check_delegmode(*dp, flags); |
2695 | if (status) | |
2696 | *dp = NULL; | |
c44c5eeb | 2697 | out: |
8b289b2c | 2698 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2699 | return nfs_ok; |
2700 | if (status) | |
2701 | return status; | |
dad1c067 | 2702 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2703 | return nfs_ok; |
567d9829 N |
2704 | } |
2705 | ||
b37ad28b | 2706 | static __be32 |
dcef0413 | 2707 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2708 | { |
dcef0413 | 2709 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2710 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2711 | |
8beefa24 | 2712 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2713 | /* ignore lock owners */ |
2714 | if (local->st_stateowner->so_is_open_owner == 0) | |
2715 | continue; | |
2716 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2717 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2718 | *stpp = local; |
2719 | /* check for conflicting share reservations */ | |
2720 | if (!test_share(local, open)) | |
77eaae8d | 2721 | return nfserr_share_denied; |
1da177e4 | 2722 | } |
77eaae8d | 2723 | return nfs_ok; |
1da177e4 LT |
2724 | } |
2725 | ||
21fb4016 BF |
2726 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2727 | { | |
2728 | int flags = 0; | |
2729 | ||
2730 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2731 | flags |= NFSD_MAY_READ; | |
2732 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2733 | flags |= NFSD_MAY_WRITE; | |
2734 | return flags; | |
2735 | } | |
2736 | ||
0c12eaff CB |
2737 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2738 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2739 | { |
2740 | __be32 status; | |
0c12eaff CB |
2741 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2742 | int access = nfs4_access_to_access(open->op_share_access); | |
2743 | ||
f9d7562f BF |
2744 | if (!fp->fi_fds[oflag]) { |
2745 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2746 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2747 | if (status) |
2748 | return status; | |
2749 | } | |
2750 | nfs4_file_get_access(fp, oflag); | |
2751 | ||
2752 | return nfs_ok; | |
2753 | } | |
2754 | ||
b37ad28b | 2755 | static inline __be32 |
1da177e4 LT |
2756 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2757 | struct nfsd4_open *open) | |
2758 | { | |
2759 | struct iattr iattr = { | |
2760 | .ia_valid = ATTR_SIZE, | |
2761 | .ia_size = 0, | |
2762 | }; | |
2763 | if (!open->op_truncate) | |
2764 | return 0; | |
2765 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2766 | return nfserr_inval; |
1da177e4 LT |
2767 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2768 | } | |
2769 | ||
b37ad28b | 2770 | static __be32 |
dcef0413 | 2771 | 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 | 2772 | { |
b6d2f1ca | 2773 | u32 op_share_access = open->op_share_access; |
7d947842 | 2774 | bool new_access; |
b37ad28b | 2775 | __be32 status; |
1da177e4 | 2776 | |
82c5ff1b | 2777 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2778 | if (new_access) { |
0c12eaff | 2779 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2780 | if (status) |
2781 | return status; | |
6c26d08f | 2782 | } |
1da177e4 LT |
2783 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2784 | if (status) { | |
f9d7562f | 2785 | if (new_access) { |
f197c271 | 2786 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2787 | nfs4_file_put_access(fp, oflag); |
2788 | } | |
1da177e4 LT |
2789 | return status; |
2790 | } | |
2791 | /* remember the open */ | |
82c5ff1b | 2792 | set_access(op_share_access, stp); |
ce0fc43c | 2793 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2794 | |
2795 | return nfs_ok; | |
2796 | } | |
2797 | ||
2798 | ||
1da177e4 | 2799 | static void |
1255a8f3 | 2800 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2801 | { |
dad1c067 | 2802 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2803 | } |
2804 | ||
14a24e99 BF |
2805 | /* Should we give out recallable state?: */ |
2806 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2807 | { | |
2808 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2809 | return true; | |
2810 | /* | |
2811 | * In the sessions case, since we don't have to establish a | |
2812 | * separate connection for callbacks, we assume it's OK | |
2813 | * until we hear otherwise: | |
2814 | */ | |
2815 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2816 | } | |
2817 | ||
22d38c4c BF |
2818 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2819 | { | |
2820 | struct file_lock *fl; | |
2821 | ||
2822 | fl = locks_alloc_lock(); | |
2823 | if (!fl) | |
2824 | return NULL; | |
2825 | locks_init_lock(fl); | |
2826 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2827 | fl->fl_flags = FL_LEASE; | |
2828 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2829 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2830 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2831 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2832 | return fl; |
2833 | } | |
2834 | ||
edab9782 BF |
2835 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2836 | { | |
acfdf5c3 | 2837 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2838 | struct file_lock *fl; |
2839 | int status; | |
2840 | ||
2841 | fl = nfs4_alloc_init_lease(dp, flag); | |
2842 | if (!fl) | |
2843 | return -ENOMEM; | |
acfdf5c3 | 2844 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2845 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2846 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2847 | if (status) { |
acfdf5c3 | 2848 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2849 | locks_free_lock(fl); |
2850 | return -ENOMEM; | |
2851 | } | |
acfdf5c3 | 2852 | fp->fi_lease = fl; |
cb0942b8 | 2853 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2854 | atomic_set(&fp->fi_delegees, 1); |
2855 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2856 | return 0; | |
2857 | } | |
2858 | ||
2859 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2860 | { | |
2861 | struct nfs4_file *fp = dp->dl_file; | |
2862 | ||
2863 | if (!fp->fi_lease) | |
2864 | return nfs4_setlease(dp, flag); | |
2865 | spin_lock(&recall_lock); | |
2866 | if (fp->fi_had_conflict) { | |
2867 | spin_unlock(&recall_lock); | |
2868 | return -EAGAIN; | |
2869 | } | |
2870 | atomic_inc(&fp->fi_delegees); | |
2871 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2872 | spin_unlock(&recall_lock); | |
2a74aba7 | 2873 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2874 | return 0; |
2875 | } | |
2876 | ||
4aa8913c BH |
2877 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2878 | { | |
2879 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2880 | if (status == -EAGAIN) | |
2881 | open->op_why_no_deleg = WND4_CONTENTION; | |
2882 | else { | |
2883 | open->op_why_no_deleg = WND4_RESOURCE; | |
2884 | switch (open->op_deleg_want) { | |
2885 | case NFS4_SHARE_WANT_READ_DELEG: | |
2886 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2887 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2888 | break; | |
2889 | case NFS4_SHARE_WANT_CANCEL: | |
2890 | open->op_why_no_deleg = WND4_CANCELLED; | |
2891 | break; | |
2892 | case NFS4_SHARE_WANT_NO_DELEG: | |
2893 | BUG(); /* not supposed to get here */ | |
2894 | } | |
2895 | } | |
2896 | } | |
2897 | ||
1da177e4 LT |
2898 | /* |
2899 | * Attempt to hand out a delegation. | |
2900 | */ | |
2901 | static void | |
5ccb0066 SK |
2902 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2903 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2904 | { |
2905 | struct nfs4_delegation *dp; | |
fe0750e5 | 2906 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2907 | int cb_up; |
d24433cd | 2908 | int status = 0, flag = 0; |
1da177e4 | 2909 | |
fe0750e5 | 2910 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2911 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2912 | open->op_recall = 0; |
2913 | switch (open->op_claim_type) { | |
2914 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2915 | if (!cb_up) |
7b190fec N |
2916 | open->op_recall = 1; |
2917 | flag = open->op_delegate_type; | |
2918 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2919 | goto out; | |
2920 | break; | |
2921 | case NFS4_OPEN_CLAIM_NULL: | |
2922 | /* Let's not give out any delegations till everyone's | |
2923 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2924 | if (locks_in_grace(net)) |
7b190fec | 2925 | goto out; |
dad1c067 | 2926 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2927 | goto out; |
2928 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2929 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2930 | else | |
2931 | flag = NFS4_OPEN_DELEGATE_READ; | |
2932 | break; | |
2933 | default: | |
2934 | goto out; | |
2935 | } | |
1da177e4 | 2936 | |
fe0750e5 | 2937 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2938 | if (dp == NULL) |
2939 | goto out_no_deleg; | |
acfdf5c3 | 2940 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2941 | if (status) |
dd239cc0 | 2942 | goto out_free; |
1da177e4 | 2943 | |
d5477a8d | 2944 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2945 | |
8c10cbdb | 2946 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2947 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2948 | out: |
2949 | open->op_delegate_type = flag; | |
d24433cd BH |
2950 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2951 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2952 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2953 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2954 | ||
4aa8913c BH |
2955 | /* 4.1 client asking for a delegation? */ |
2956 | if (open->op_deleg_want) | |
2957 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2958 | } |
dd239cc0 BF |
2959 | return; |
2960 | out_free: | |
acfdf5c3 | 2961 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2962 | out_no_deleg: |
2963 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2964 | goto out; | |
1da177e4 LT |
2965 | } |
2966 | ||
e27f49c3 BH |
2967 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2968 | struct nfs4_delegation *dp) | |
2969 | { | |
2970 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2971 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2972 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2973 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2974 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2975 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2976 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2977 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2978 | } | |
2979 | /* Otherwise the client must be confused wanting a delegation | |
2980 | * it already has, therefore we don't return | |
2981 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
2982 | */ | |
2983 | } | |
2984 | ||
1da177e4 LT |
2985 | /* |
2986 | * called with nfs4_lock_state() held. | |
2987 | */ | |
b37ad28b | 2988 | __be32 |
1da177e4 LT |
2989 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2990 | { | |
6668958f | 2991 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2992 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2993 | struct nfs4_file *fp = NULL; |
2994 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2995 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2996 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2997 | __be32 status; |
1da177e4 | 2998 | |
1da177e4 LT |
2999 | /* |
3000 | * Lookup file; if found, lookup stateid and check open request, | |
3001 | * and check for delegations in the process of being recalled. | |
3002 | * If not found, create the nfs4_file struct | |
3003 | */ | |
3004 | fp = find_file(ino); | |
3005 | if (fp) { | |
3006 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3007 | goto out; | |
38c2f4b1 | 3008 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3009 | if (status) |
3010 | goto out; | |
1da177e4 | 3011 | } else { |
c44c5eeb | 3012 | status = nfserr_bad_stateid; |
8b289b2c | 3013 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3014 | goto out; |
3e772463 | 3015 | status = nfserr_jukebox; |
32513b40 BF |
3016 | fp = open->op_file; |
3017 | open->op_file = NULL; | |
3018 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3019 | } |
3020 | ||
3021 | /* | |
3022 | * OPEN the file, or upgrade an existing OPEN. | |
3023 | * If truncate fails, the OPEN fails. | |
3024 | */ | |
3025 | if (stp) { | |
3026 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3027 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3028 | if (status) |
3029 | goto out; | |
3030 | } else { | |
4cdc951b | 3031 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3032 | if (status) |
3033 | goto out; | |
3034 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3035 | if (status) |
1da177e4 | 3036 | goto out; |
4cdc951b BF |
3037 | stp = open->op_stp; |
3038 | open->op_stp = NULL; | |
996e0938 | 3039 | init_open_stateid(stp, fp, open); |
1da177e4 | 3040 | } |
dcef0413 BF |
3041 | update_stateid(&stp->st_stid.sc_stateid); |
3042 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3043 | |
d24433cd | 3044 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3045 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3046 | |
d24433cd BH |
3047 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3048 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3049 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3050 | goto nodeleg; | |
3051 | } | |
3052 | } | |
3053 | ||
1da177e4 LT |
3054 | /* |
3055 | * Attempt to hand out a delegation. No error return, because the | |
3056 | * OPEN succeeds even if we fail. | |
3057 | */ | |
5ccb0066 | 3058 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3059 | nodeleg: |
1da177e4 LT |
3060 | status = nfs_ok; |
3061 | ||
8c10cbdb | 3062 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3063 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3064 | out: |
d24433cd BH |
3065 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3066 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3067 | open->op_deleg_want) |
3068 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3069 | |
13cd2184 N |
3070 | if (fp) |
3071 | put_nfs4_file(fp); | |
37515177 | 3072 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3073 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3074 | /* |
3075 | * To finish the open response, we just need to set the rflags. | |
3076 | */ | |
3077 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3078 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3079 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3080 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3081 | ||
3082 | return status; | |
3083 | } | |
3084 | ||
d29b20cd BF |
3085 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3086 | { | |
3087 | if (open->op_openowner) { | |
3088 | struct nfs4_openowner *oo = open->op_openowner; | |
3089 | ||
3090 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3091 | list_del_init(&oo->oo_close_lru); | |
3092 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3093 | if (status) { | |
3094 | release_openowner(oo); | |
3095 | open->op_openowner = NULL; | |
3096 | } else | |
3097 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3098 | } | |
3099 | } | |
32513b40 BF |
3100 | if (open->op_file) |
3101 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3102 | if (open->op_stp) |
ef79859e | 3103 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3104 | } |
3105 | ||
b37ad28b | 3106 | __be32 |
b591480b BF |
3107 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3108 | clientid_t *clid) | |
1da177e4 LT |
3109 | { |
3110 | struct nfs4_client *clp; | |
b37ad28b | 3111 | __be32 status; |
2c142baa | 3112 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
3113 | |
3114 | nfs4_lock_state(); | |
3115 | dprintk("process_renew(%08x/%08x): starting\n", | |
3116 | clid->cl_boot, clid->cl_id); | |
3117 | status = nfserr_stale_clientid; | |
2c142baa | 3118 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3119 | goto out; |
d15c077e | 3120 | clp = find_confirmed_client(clid, cstate->minorversion); |
1da177e4 LT |
3121 | status = nfserr_expired; |
3122 | if (clp == NULL) { | |
3123 | /* We assume the client took too long to RENEW. */ | |
3124 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3125 | goto out; | |
3126 | } | |
1da177e4 | 3127 | status = nfserr_cb_path_down; |
ea1da636 | 3128 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3129 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3130 | goto out; |
3131 | status = nfs_ok; | |
3132 | out: | |
3133 | nfs4_unlock_state(); | |
3134 | return status; | |
3135 | } | |
3136 | ||
a76b4319 | 3137 | static void |
5e1533c7 | 3138 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3139 | { |
5e1533c7 SK |
3140 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3141 | ||
33dcc481 | 3142 | /* do nothing if grace period already ended */ |
a51c84ed | 3143 | if (nn->grace_ended) |
33dcc481 JL |
3144 | return; |
3145 | ||
a76b4319 | 3146 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3147 | nn->grace_ended = true; |
2c142baa | 3148 | nfsd4_record_grace_done(net, nn->boot_time); |
5e1533c7 | 3149 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3150 | /* |
3151 | * Now that every NFSv4 client has had the chance to recover and | |
3152 | * to see the (possibly new, possibly shorter) lease time, we | |
3153 | * can safely set the next grace time to the current lease time: | |
3154 | */ | |
3155 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3156 | } |
3157 | ||
fd39ca9a | 3158 | static time_t |
1da177e4 LT |
3159 | nfs4_laundromat(void) |
3160 | { | |
3161 | struct nfs4_client *clp; | |
fe0750e5 | 3162 | struct nfs4_openowner *oo; |
1da177e4 LT |
3163 | struct nfs4_delegation *dp; |
3164 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3165 | time_t cutoff = get_seconds() - nfsd4_lease; |
3166 | time_t t, clientid_val = nfsd4_lease; | |
3167 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3168 | |
3169 | nfs4_lock_state(); | |
3170 | ||
3171 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3172 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3173 | INIT_LIST_HEAD(&reaplist); |
3174 | spin_lock(&client_lock); | |
1da177e4 LT |
3175 | list_for_each_safe(pos, next, &client_lru) { |
3176 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3177 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3178 | t = clp->cl_time - cutoff; | |
3179 | if (clientid_val > t) | |
3180 | clientid_val = t; | |
3181 | break; | |
3182 | } | |
d7682988 BH |
3183 | if (atomic_read(&clp->cl_refcount)) { |
3184 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3185 | clp->cl_clientid.cl_id); | |
3186 | continue; | |
3187 | } | |
3188 | unhash_client_locked(clp); | |
3189 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3190 | } |
3191 | spin_unlock(&client_lock); | |
3192 | list_for_each_safe(pos, next, &reaplist) { | |
3193 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3194 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3195 | clp->cl_clientid.cl_id); | |
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; |
b37ad28b | 3809 | __be32 status; |
1da177e4 | 3810 | |
ca364317 | 3811 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3812 | return status; |
1da177e4 LT |
3813 | |
3814 | nfs4_lock_state(); | |
d15c077e | 3815 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); |
38c2f4b1 | 3816 | if (status) |
203a8c8e | 3817 | goto out; |
38c2f4b1 | 3818 | dp = delegstateid(s); |
d5477a8d | 3819 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3820 | if (status) |
3821 | goto out; | |
203a8c8e BF |
3822 | |
3823 | unhash_delegation(dp); | |
1da177e4 | 3824 | out: |
203a8c8e BF |
3825 | nfs4_unlock_state(); |
3826 | ||
1da177e4 LT |
3827 | return status; |
3828 | } | |
3829 | ||
3830 | ||
1da177e4 | 3831 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3832 | |
009673b4 BF |
3833 | #define LOCKOWNER_INO_HASH_BITS 8 |
3834 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3835 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3836 | |
87df4de8 BH |
3837 | static inline u64 |
3838 | end_offset(u64 start, u64 len) | |
3839 | { | |
3840 | u64 end; | |
3841 | ||
3842 | end = start + len; | |
3843 | return end >= start ? end: NFS4_MAX_UINT64; | |
3844 | } | |
3845 | ||
3846 | /* last octet in a range */ | |
3847 | static inline u64 | |
3848 | last_byte_offset(u64 start, u64 len) | |
3849 | { | |
3850 | u64 end; | |
3851 | ||
3852 | BUG_ON(!len); | |
3853 | end = start + len; | |
3854 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3855 | } | |
3856 | ||
009673b4 | 3857 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3858 | { |
3859 | return (file_hashval(inode) + cl_id | |
3860 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3861 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3862 | } |
3863 | ||
009673b4 | 3864 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3865 | |
1da177e4 LT |
3866 | /* |
3867 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3868 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3869 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3870 | * locking, this prevents us from being completely protocol-compliant. The | |
3871 | * real solution to this problem is to start using unsigned file offsets in | |
3872 | * the VFS, but this is a very deep change! | |
3873 | */ | |
3874 | static inline void | |
3875 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3876 | { | |
3877 | if (lock->fl_start < 0) | |
3878 | lock->fl_start = OFFSET_MAX; | |
3879 | if (lock->fl_end < 0) | |
3880 | lock->fl_end = OFFSET_MAX; | |
3881 | } | |
3882 | ||
d5b9026a N |
3883 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3884 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3885 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3886 | }; |
1da177e4 LT |
3887 | |
3888 | static inline void | |
3889 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3890 | { | |
fe0750e5 | 3891 | struct nfs4_lockowner *lo; |
1da177e4 | 3892 | |
d5b9026a | 3893 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3894 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3895 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3896 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3897 | if (!deny->ld_owner.data) |
3898 | /* We just don't care that much */ | |
3899 | goto nevermind; | |
fe0750e5 BF |
3900 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3901 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3902 | } else { |
7c13f344 BF |
3903 | nevermind: |
3904 | deny->ld_owner.len = 0; | |
3905 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3906 | deny->ld_clientid.cl_boot = 0; |
3907 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3908 | } |
3909 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3910 | deny->ld_length = NFS4_MAX_UINT64; |
3911 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3912 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3913 | deny->ld_type = NFS4_READ_LT; | |
3914 | if (fl->fl_type != F_RDLCK) | |
3915 | deny->ld_type = NFS4_WRITE_LT; | |
3916 | } | |
3917 | ||
b93d87c1 BF |
3918 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3919 | { | |
3920 | struct nfs4_ol_stateid *lst; | |
3921 | ||
3922 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3923 | return false; | |
3924 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3925 | struct nfs4_ol_stateid, st_perstateowner); | |
3926 | return lst->st_file->fi_inode == inode; | |
3927 | } | |
3928 | ||
fe0750e5 BF |
3929 | static struct nfs4_lockowner * |
3930 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3931 | struct xdr_netobj *owner) |
3932 | { | |
009673b4 | 3933 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3934 | struct nfs4_lockowner *lo; |
1da177e4 | 3935 | |
009673b4 | 3936 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3937 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3938 | return lo; | |
1da177e4 LT |
3939 | } |
3940 | return NULL; | |
3941 | } | |
3942 | ||
dcef0413 | 3943 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3944 | { |
009673b4 BF |
3945 | struct inode *inode = open_stp->st_file->fi_inode; |
3946 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3947 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3948 | ||
16bfdaaf | 3949 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3950 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3951 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3952 | } |
3953 | ||
1da177e4 LT |
3954 | /* |
3955 | * Alloc a lock owner structure. | |
3956 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3957 | * occurred. |
1da177e4 | 3958 | * |
16bfdaaf | 3959 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3960 | */ |
3961 | ||
fe0750e5 | 3962 | static struct nfs4_lockowner * |
dcef0413 | 3963 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3964 | struct nfs4_lockowner *lo; |
1da177e4 | 3965 | |
fe0750e5 BF |
3966 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3967 | if (!lo) | |
1da177e4 | 3968 | return NULL; |
fe0750e5 BF |
3969 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3970 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3971 | /* It is the openowner seqid that will be incremented in encode in the |
3972 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3973 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3974 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3975 | return lo; | |
1da177e4 LT |
3976 | } |
3977 | ||
dcef0413 BF |
3978 | static struct nfs4_ol_stateid * |
3979 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3980 | { |
dcef0413 | 3981 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3982 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3983 | |
996e0938 | 3984 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3985 | if (stp == NULL) |
6136d2b4 | 3986 | return NULL; |
996e0938 | 3987 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3988 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3989 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3990 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3991 | get_nfs4_file(fp); |
1da177e4 | 3992 | stp->st_file = fp; |
0997b173 | 3993 | stp->st_access_bmap = 0; |
1da177e4 | 3994 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3995 | stp->st_openstp = open_stp; |
1da177e4 LT |
3996 | return stp; |
3997 | } | |
3998 | ||
fd39ca9a | 3999 | static int |
1da177e4 LT |
4000 | check_lock_length(u64 offset, u64 length) |
4001 | { | |
87df4de8 | 4002 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4003 | LOFF_OVERFLOW(offset, length))); |
4004 | } | |
4005 | ||
dcef0413 | 4006 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4007 | { |
4008 | struct nfs4_file *fp = lock_stp->st_file; | |
4009 | int oflag = nfs4_access_to_omode(access); | |
4010 | ||
82c5ff1b | 4011 | if (test_access(access, lock_stp)) |
0997b173 BF |
4012 | return; |
4013 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4014 | set_access(access, lock_stp); |
0997b173 BF |
4015 | } |
4016 | ||
2355c596 | 4017 | 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 |
4018 | { |
4019 | struct nfs4_file *fi = ost->st_file; | |
4020 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4021 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4022 | struct nfs4_lockowner *lo; | |
4023 | unsigned int strhashval; | |
4024 | ||
4025 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4026 | if (lo) { | |
4027 | if (!cstate->minorversion) | |
4028 | return nfserr_bad_seqid; | |
4029 | /* XXX: a lockowner always has exactly one stateid: */ | |
4030 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4031 | struct nfs4_ol_stateid, st_perstateowner); | |
4032 | return nfs_ok; | |
4033 | } | |
16bfdaaf | 4034 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4035 | &lock->v.new.owner); |
4036 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4037 | if (lo == NULL) | |
4038 | return nfserr_jukebox; | |
4039 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4040 | if (*lst == NULL) { | |
4041 | release_lockowner(lo); | |
4042 | return nfserr_jukebox; | |
4043 | } | |
4044 | *new = true; | |
4045 | return nfs_ok; | |
4046 | } | |
4047 | ||
1da177e4 LT |
4048 | /* |
4049 | * LOCK operation | |
4050 | */ | |
b37ad28b | 4051 | __be32 |
ca364317 | 4052 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4053 | struct nfsd4_lock *lock) |
1da177e4 | 4054 | { |
fe0750e5 BF |
4055 | struct nfs4_openowner *open_sop = NULL; |
4056 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4057 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4058 | struct file *filp = NULL; |
21179d81 JL |
4059 | struct file_lock *file_lock = NULL; |
4060 | struct file_lock *conflock = NULL; | |
b37ad28b | 4061 | __be32 status = 0; |
64a284d0 | 4062 | bool new_state = false; |
b34f27aa | 4063 | int lkflg; |
b8dd7b9a | 4064 | int err; |
2c142baa | 4065 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
4066 | |
4067 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4068 | (long long) lock->lk_offset, | |
4069 | (long long) lock->lk_length); | |
4070 | ||
1da177e4 LT |
4071 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4072 | return nfserr_inval; | |
4073 | ||
ca364317 | 4074 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4075 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4076 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4077 | return status; | |
4078 | } | |
4079 | ||
1da177e4 LT |
4080 | nfs4_lock_state(); |
4081 | ||
4082 | if (lock->lk_is_new) { | |
dcef0413 | 4083 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4084 | |
4085 | if (nfsd4_has_session(cstate)) | |
4086 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4087 | memcpy(&lock->v.new.clientid, | |
4088 | &cstate->session->se_client->cl_clientid, | |
4089 | sizeof(clientid_t)); | |
4090 | ||
1da177e4 | 4091 | status = nfserr_stale_clientid; |
2c142baa | 4092 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4093 | goto out; |
1da177e4 | 4094 | |
1da177e4 | 4095 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4096 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4097 | lock->lk_new_open_seqid, |
4098 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4099 | &open_stp); |
37515177 | 4100 | if (status) |
1da177e4 | 4101 | goto out; |
fe0750e5 | 4102 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4103 | status = nfserr_bad_stateid; |
684e5638 | 4104 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4105 | &lock->v.new.clientid)) |
4106 | goto out; | |
64a284d0 BF |
4107 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4108 | &lock_stp, &new_state); | |
e1aaa891 | 4109 | } else |
dd453dfd | 4110 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4111 | lock->lk_old_lock_seqid, |
4112 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4113 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4114 | if (status) |
4115 | goto out; | |
64a284d0 | 4116 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4117 | |
b34f27aa BF |
4118 | lkflg = setlkflg(lock->lk_type); |
4119 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4120 | if (status) | |
4121 | goto out; | |
4122 | ||
0dd395dc | 4123 | status = nfserr_grace; |
5ccb0066 | 4124 | if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) |
0dd395dc N |
4125 | goto out; |
4126 | status = nfserr_no_grace; | |
5ccb0066 | 4127 | if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) |
0dd395dc N |
4128 | goto out; |
4129 | ||
21179d81 JL |
4130 | file_lock = locks_alloc_lock(); |
4131 | if (!file_lock) { | |
4132 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4133 | status = nfserr_jukebox; | |
4134 | goto out; | |
4135 | } | |
4136 | ||
4137 | locks_init_lock(file_lock); | |
1da177e4 LT |
4138 | switch (lock->lk_type) { |
4139 | case NFS4_READ_LT: | |
4140 | case NFS4_READW_LT: | |
0997b173 BF |
4141 | filp = find_readable_file(lock_stp->st_file); |
4142 | if (filp) | |
4143 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4144 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4145 | break; |
1da177e4 LT |
4146 | case NFS4_WRITE_LT: |
4147 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4148 | filp = find_writeable_file(lock_stp->st_file); |
4149 | if (filp) | |
4150 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4151 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4152 | break; |
1da177e4 LT |
4153 | default: |
4154 | status = nfserr_inval; | |
4155 | goto out; | |
4156 | } | |
f9d7562f BF |
4157 | if (!filp) { |
4158 | status = nfserr_openmode; | |
4159 | goto out; | |
4160 | } | |
21179d81 JL |
4161 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4162 | file_lock->fl_pid = current->tgid; | |
4163 | file_lock->fl_file = filp; | |
4164 | file_lock->fl_flags = FL_POSIX; | |
4165 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4166 | file_lock->fl_start = lock->lk_offset; | |
4167 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4168 | nfs4_transform_lock_offset(file_lock); | |
4169 | ||
4170 | conflock = locks_alloc_lock(); | |
4171 | if (!conflock) { | |
4172 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4173 | status = nfserr_jukebox; | |
4174 | goto out; | |
4175 | } | |
1da177e4 | 4176 | |
21179d81 | 4177 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4178 | switch (-err) { |
1da177e4 | 4179 | case 0: /* success! */ |
dcef0413 BF |
4180 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4181 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4182 | sizeof(stateid_t)); |
b8dd7b9a | 4183 | status = 0; |
eb76b3fd AA |
4184 | break; |
4185 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4186 | status = nfserr_denied; | |
4187 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4188 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4189 | break; |
1da177e4 LT |
4190 | case (EDEADLK): |
4191 | status = nfserr_deadlock; | |
eb76b3fd | 4192 | break; |
3e772463 | 4193 | default: |
fd85b817 | 4194 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4195 | status = nfserrno(err); |
eb76b3fd | 4196 | break; |
1da177e4 | 4197 | } |
1da177e4 | 4198 | out: |
64a284d0 | 4199 | if (status && new_state) |
f044ff83 | 4200 | release_lockowner(lock_sop); |
5ec094c1 BF |
4201 | if (!cstate->replay_owner) |
4202 | nfs4_unlock_state(); | |
21179d81 JL |
4203 | if (file_lock) |
4204 | locks_free_lock(file_lock); | |
4205 | if (conflock) | |
4206 | locks_free_lock(conflock); | |
1da177e4 LT |
4207 | return status; |
4208 | } | |
4209 | ||
55ef1274 BF |
4210 | /* |
4211 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4212 | * so we do a temporary open here just to get an open file to pass to | |
4213 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4214 | * inode operation.) | |
4215 | */ | |
04da6e9d | 4216 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4217 | { |
4218 | struct file *file; | |
04da6e9d AV |
4219 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4220 | if (!err) { | |
4221 | err = nfserrno(vfs_test_lock(file, lock)); | |
4222 | nfsd_close(file); | |
4223 | } | |
55ef1274 BF |
4224 | return err; |
4225 | } | |
4226 | ||
1da177e4 LT |
4227 | /* |
4228 | * LOCKT operation | |
4229 | */ | |
b37ad28b | 4230 | __be32 |
ca364317 BF |
4231 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4232 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4233 | { |
4234 | struct inode *inode; | |
21179d81 | 4235 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4236 | struct nfs4_lockowner *lo; |
b37ad28b | 4237 | __be32 status; |
2c142baa | 4238 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 4239 | |
5ccb0066 | 4240 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4241 | return nfserr_grace; |
4242 | ||
4243 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4244 | return nfserr_inval; | |
4245 | ||
1da177e4 LT |
4246 | nfs4_lock_state(); |
4247 | ||
4248 | status = nfserr_stale_clientid; | |
2c142baa | 4249 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) |
1da177e4 | 4250 | goto out; |
1da177e4 | 4251 | |
75c096f7 | 4252 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4253 | goto out; |
1da177e4 | 4254 | |
ca364317 | 4255 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4256 | file_lock = locks_alloc_lock(); |
4257 | if (!file_lock) { | |
4258 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4259 | status = nfserr_jukebox; | |
4260 | goto out; | |
4261 | } | |
4262 | locks_init_lock(file_lock); | |
1da177e4 LT |
4263 | switch (lockt->lt_type) { |
4264 | case NFS4_READ_LT: | |
4265 | case NFS4_READW_LT: | |
21179d81 | 4266 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4267 | break; |
4268 | case NFS4_WRITE_LT: | |
4269 | case NFS4_WRITEW_LT: | |
21179d81 | 4270 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4271 | break; |
4272 | default: | |
2fdada03 | 4273 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4274 | status = nfserr_inval; |
4275 | goto out; | |
4276 | } | |
4277 | ||
fe0750e5 BF |
4278 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4279 | if (lo) | |
21179d81 JL |
4280 | file_lock->fl_owner = (fl_owner_t)lo; |
4281 | file_lock->fl_pid = current->tgid; | |
4282 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4283 | |
21179d81 JL |
4284 | file_lock->fl_start = lockt->lt_offset; |
4285 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4286 | |
21179d81 | 4287 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4288 | |
21179d81 | 4289 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4290 | if (status) |
fd85b817 | 4291 | goto out; |
04da6e9d | 4292 | |
21179d81 | 4293 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4294 | status = nfserr_denied; |
21179d81 | 4295 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4296 | } |
4297 | out: | |
4298 | nfs4_unlock_state(); | |
21179d81 JL |
4299 | if (file_lock) |
4300 | locks_free_lock(file_lock); | |
1da177e4 LT |
4301 | return status; |
4302 | } | |
4303 | ||
b37ad28b | 4304 | __be32 |
ca364317 | 4305 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4306 | struct nfsd4_locku *locku) |
1da177e4 | 4307 | { |
dcef0413 | 4308 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4309 | struct file *filp = NULL; |
21179d81 | 4310 | struct file_lock *file_lock = NULL; |
b37ad28b | 4311 | __be32 status; |
b8dd7b9a | 4312 | int err; |
1da177e4 LT |
4313 | |
4314 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4315 | (long long) locku->lu_offset, | |
4316 | (long long) locku->lu_length); | |
4317 | ||
4318 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4319 | return nfserr_inval; | |
4320 | ||
4321 | nfs4_lock_state(); | |
4322 | ||
9072d5c6 | 4323 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4324 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4325 | if (status) |
1da177e4 | 4326 | goto out; |
f9d7562f BF |
4327 | filp = find_any_file(stp->st_file); |
4328 | if (!filp) { | |
4329 | status = nfserr_lock_range; | |
4330 | goto out; | |
4331 | } | |
21179d81 JL |
4332 | file_lock = locks_alloc_lock(); |
4333 | if (!file_lock) { | |
4334 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4335 | status = nfserr_jukebox; | |
4336 | goto out; | |
4337 | } | |
4338 | locks_init_lock(file_lock); | |
4339 | file_lock->fl_type = F_UNLCK; | |
4340 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4341 | file_lock->fl_pid = current->tgid; | |
4342 | file_lock->fl_file = filp; | |
4343 | file_lock->fl_flags = FL_POSIX; | |
4344 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4345 | file_lock->fl_start = locku->lu_offset; | |
4346 | ||
4347 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4348 | locku->lu_length); | |
4349 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4350 | |
4351 | /* | |
4352 | * Try to unlock the file in the VFS. | |
4353 | */ | |
21179d81 | 4354 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4355 | if (err) { |
fd85b817 | 4356 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4357 | goto out_nfserr; |
4358 | } | |
4359 | /* | |
4360 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4361 | */ | |
dcef0413 BF |
4362 | update_stateid(&stp->st_stid.sc_stateid); |
4363 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4364 | |
4365 | out: | |
71c3bcd7 BF |
4366 | if (!cstate->replay_owner) |
4367 | nfs4_unlock_state(); | |
21179d81 JL |
4368 | if (file_lock) |
4369 | locks_free_lock(file_lock); | |
1da177e4 LT |
4370 | return status; |
4371 | ||
4372 | out_nfserr: | |
b8dd7b9a | 4373 | status = nfserrno(err); |
1da177e4 LT |
4374 | goto out; |
4375 | } | |
4376 | ||
4377 | /* | |
4378 | * returns | |
4379 | * 1: locks held by lockowner | |
4380 | * 0: no locks held by lockowner | |
4381 | */ | |
4382 | static int | |
fe0750e5 | 4383 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4384 | { |
4385 | struct file_lock **flpp; | |
f9d7562f | 4386 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4387 | int status = 0; |
4388 | ||
b89f4321 | 4389 | lock_flocks(); |
1da177e4 | 4390 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4391 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4392 | status = 1; |
4393 | goto out; | |
796dadfd | 4394 | } |
1da177e4 LT |
4395 | } |
4396 | out: | |
b89f4321 | 4397 | unlock_flocks(); |
1da177e4 LT |
4398 | return status; |
4399 | } | |
4400 | ||
b37ad28b | 4401 | __be32 |
b591480b BF |
4402 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4403 | struct nfsd4_compound_state *cstate, | |
4404 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4405 | { |
4406 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4407 | struct nfs4_stateowner *sop; |
fe0750e5 | 4408 | struct nfs4_lockowner *lo; |
dcef0413 | 4409 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4410 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4411 | struct list_head matches; |
16bfdaaf | 4412 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4413 | __be32 status; |
2c142baa | 4414 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 LT |
4415 | |
4416 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4417 | clid->cl_boot, clid->cl_id); | |
4418 | ||
4419 | /* XXX check for lease expiration */ | |
4420 | ||
4421 | status = nfserr_stale_clientid; | |
2c142baa | 4422 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4423 | return status; |
1da177e4 LT |
4424 | |
4425 | nfs4_lock_state(); | |
4426 | ||
3e9e3dbe | 4427 | status = nfserr_locks_held; |
3e9e3dbe | 4428 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4429 | |
16bfdaaf BF |
4430 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4431 | if (sop->so_is_open_owner) | |
4432 | continue; | |
06f1f864 BF |
4433 | if (!same_owner_str(sop, owner, clid)) |
4434 | continue; | |
4435 | list_for_each_entry(stp, &sop->so_stateids, | |
4436 | st_perstateowner) { | |
4437 | lo = lockowner(sop); | |
4438 | if (check_for_locks(stp->st_file, lo)) | |
4439 | goto out; | |
4440 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4441 | } |
3e9e3dbe N |
4442 | } |
4443 | /* Clients probably won't expect us to return with some (but not all) | |
4444 | * of the lockowner state released; so don't release any until all | |
4445 | * have been checked. */ | |
4446 | status = nfs_ok; | |
0fa822e4 | 4447 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4448 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4449 | lo_list); | |
0fa822e4 N |
4450 | /* unhash_stateowner deletes so_perclient only |
4451 | * for openowners. */ | |
fe0750e5 BF |
4452 | list_del(&lo->lo_list); |
4453 | release_lockowner(lo); | |
1da177e4 LT |
4454 | } |
4455 | out: | |
4456 | nfs4_unlock_state(); | |
4457 | return status; | |
4458 | } | |
4459 | ||
4460 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4461 | alloc_reclaim(void) |
1da177e4 | 4462 | { |
a55370a3 | 4463 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4464 | } |
4465 | ||
c7b9a459 | 4466 | int |
a1bcecd2 | 4467 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4468 | { |
4469 | unsigned int strhashval = clientstr_hashval(name); | |
4470 | struct nfs4_client *clp; | |
4471 | ||
e203d506 | 4472 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4473 | if (!clp) |
4474 | return 0; | |
a52d726b | 4475 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4476 | } |
4477 | ||
1da177e4 LT |
4478 | /* |
4479 | * failure => all reset bets are off, nfserr_no_grace... | |
4480 | */ | |
190e4fbf N |
4481 | int |
4482 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4483 | { |
4484 | unsigned int strhashval; | |
4485 | struct nfs4_client_reclaim *crp = NULL; | |
4486 | ||
a55370a3 N |
4487 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4488 | crp = alloc_reclaim(); | |
1da177e4 LT |
4489 | if (!crp) |
4490 | return 0; | |
a55370a3 | 4491 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4492 | INIT_LIST_HEAD(&crp->cr_strhash); |
4493 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4494 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4495 | reclaim_str_hashtbl_size++; |
4496 | return 1; | |
4497 | } | |
4498 | ||
2a4317c5 | 4499 | void |
1da177e4 LT |
4500 | nfs4_release_reclaim(void) |
4501 | { | |
4502 | struct nfs4_client_reclaim *crp = NULL; | |
4503 | int i; | |
4504 | ||
1da177e4 LT |
4505 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4506 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4507 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4508 | struct nfs4_client_reclaim, cr_strhash); | |
4509 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4510 | kfree(crp); |
4511 | reclaim_str_hashtbl_size--; | |
4512 | } | |
4513 | } | |
4514 | BUG_ON(reclaim_str_hashtbl_size); | |
4515 | } | |
4516 | ||
4517 | /* | |
4518 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4519 | struct nfs4_client_reclaim * |
a52d726b | 4520 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4521 | { |
4522 | unsigned int strhashval; | |
1da177e4 LT |
4523 | struct nfs4_client_reclaim *crp = NULL; |
4524 | ||
a55370a3 N |
4525 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4526 | clp->cl_name.len, clp->cl_name.data, | |
4527 | clp->cl_recdir); | |
1da177e4 LT |
4528 | |
4529 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4530 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4531 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4532 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4533 | return crp; |
4534 | } | |
4535 | } | |
4536 | return NULL; | |
4537 | } | |
4538 | ||
4539 | /* | |
4540 | * Called from OPEN. Look for clientid in reclaim list. | |
4541 | */ | |
b37ad28b | 4542 | __be32 |
d15c077e | 4543 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions) |
1da177e4 | 4544 | { |
a52d726b JL |
4545 | struct nfs4_client *clp; |
4546 | ||
4547 | /* find clientid in conf_id_hashtbl */ | |
d15c077e | 4548 | clp = find_confirmed_client(clid, sessions); |
a52d726b JL |
4549 | if (clp == NULL) |
4550 | return nfserr_reclaim_bad; | |
4551 | ||
4552 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4553 | } |
4554 | ||
65178db4 BS |
4555 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4556 | ||
4557 | void nfsd_forget_clients(u64 num) | |
4558 | { | |
4559 | struct nfs4_client *clp, *next; | |
4560 | int count = 0; | |
4561 | ||
4562 | nfs4_lock_state(); | |
4563 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
65178db4 BS |
4564 | expire_client(clp); |
4565 | if (++count == num) | |
4566 | break; | |
4567 | } | |
4568 | nfs4_unlock_state(); | |
4569 | ||
4570 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4571 | } | |
4572 | ||
4573 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4574 | { | |
4575 | release_lockowner(lockowner(sop)); | |
4576 | } | |
4577 | ||
4578 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4579 | { | |
4580 | release_openowner(openowner(sop)); | |
4581 | } | |
4582 | ||
353de31b | 4583 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4584 | void (*release_sop)(struct nfs4_stateowner *)) |
4585 | { | |
4586 | int i, count = 0; | |
4587 | struct nfs4_stateowner *sop, *next; | |
4588 | ||
16bfdaaf BF |
4589 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4590 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4591 | if (sop->so_is_open_owner != is_open_owner) | |
4592 | continue; | |
65178db4 BS |
4593 | release_sop(sop); |
4594 | if (++count == num) | |
4595 | return count; | |
4596 | } | |
4597 | } | |
4598 | return count; | |
4599 | } | |
4600 | ||
4601 | void nfsd_forget_locks(u64 num) | |
4602 | { | |
4603 | int count; | |
4604 | ||
4605 | nfs4_lock_state(); | |
16bfdaaf | 4606 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4607 | nfs4_unlock_state(); |
4608 | ||
4609 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4610 | } | |
4611 | ||
4612 | void nfsd_forget_openowners(u64 num) | |
4613 | { | |
4614 | int count; | |
4615 | ||
4616 | nfs4_lock_state(); | |
16bfdaaf | 4617 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4618 | nfs4_unlock_state(); |
4619 | ||
4620 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4621 | } | |
4622 | ||
da5c80a9 | 4623 | static int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4624 | { |
4625 | int i, count = 0; | |
2d3475c0 BS |
4626 | struct nfs4_file *fp, *fnext; |
4627 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4628 | |
4629 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4630 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4631 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4632 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4633 | if (++count == num) |
4634 | return count; | |
4635 | } | |
4636 | } | |
4637 | } | |
2d3475c0 | 4638 | |
65178db4 BS |
4639 | return count; |
4640 | } | |
4641 | ||
4642 | void nfsd_forget_delegations(u64 num) | |
4643 | { | |
4644 | unsigned int count; | |
a6d88f29 SK |
4645 | LIST_HEAD(victims); |
4646 | struct nfs4_delegation *dp, *dnext; | |
4647 | ||
4648 | spin_lock(&recall_lock); | |
4649 | count = nfsd_process_n_delegations(num, &victims); | |
4650 | spin_unlock(&recall_lock); | |
65178db4 BS |
4651 | |
4652 | nfs4_lock_state(); | |
a6d88f29 SK |
4653 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4654 | unhash_delegation(dp); | |
65178db4 BS |
4655 | nfs4_unlock_state(); |
4656 | ||
4657 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4658 | } | |
4659 | ||
4660 | void nfsd_recall_delegations(u64 num) | |
4661 | { | |
4662 | unsigned int count; | |
a6d88f29 SK |
4663 | LIST_HEAD(victims); |
4664 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4665 | |
65178db4 | 4666 | spin_lock(&recall_lock); |
a6d88f29 SK |
4667 | count = nfsd_process_n_delegations(num, &victims); |
4668 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4669 | list_del(&dp->dl_recall_lru); | |
4670 | nfsd_break_one_deleg(dp); | |
4671 | } | |
65178db4 | 4672 | spin_unlock(&recall_lock); |
65178db4 BS |
4673 | |
4674 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4675 | } | |
4676 | ||
4677 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4678 | ||
ac4d8ff2 | 4679 | /* initialization to perform at module load time: */ |
1da177e4 | 4680 | |
72083396 | 4681 | void |
ac4d8ff2 | 4682 | nfs4_state_init(void) |
1da177e4 | 4683 | { |
72083396 | 4684 | int i; |
1da177e4 | 4685 | |
1da177e4 LT |
4686 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4687 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4688 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4689 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4690 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4691 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4692 | } |
5282fd72 ME |
4693 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4694 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4695 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4696 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4697 | } | |
16bfdaaf BF |
4698 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4699 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4700 | } |
009673b4 BF |
4701 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4702 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4703 | INIT_LIST_HEAD(&close_lru); |
4704 | INIT_LIST_HEAD(&client_lru); | |
4705 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4706 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4707 | } |
4708 | ||
c2f1a551 MS |
4709 | /* |
4710 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4711 | * client may quite reasonably hang on to a delegation as long as it has | |
4712 | * the inode cached. This becomes an obvious problem the first time a | |
4713 | * client's inode cache approaches the size of the server's total memory. | |
4714 | * | |
4715 | * For now we avoid this problem by imposing a hard limit on the number | |
4716 | * of delegations, which varies according to the server's memory size. | |
4717 | */ | |
4718 | static void | |
4719 | set_max_delegations(void) | |
4720 | { | |
4721 | /* | |
4722 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4723 | * estimates suggest that in the worst case (where every delegation | |
4724 | * is for a different inode), a delegation could take about 1.5K, | |
4725 | * giving a worst case usage of about 6% of memory. | |
4726 | */ | |
4727 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4728 | } | |
4729 | ||
ac4d8ff2 N |
4730 | /* initialization to perform when the nfsd service is started: */ |
4731 | ||
a6d6b781 JL |
4732 | int |
4733 | nfs4_state_start(void) | |
ac4d8ff2 | 4734 | { |
5e1533c7 SK |
4735 | struct net *net = &init_net; |
4736 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4737 | int ret; |
4738 | ||
2a4317c5 JL |
4739 | /* |
4740 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4741 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4742 | * need to pass a net pointer into this function, take a reference | |
4743 | * to that instead and then do most of the rest of this on a per-net | |
4744 | * basis. | |
4745 | */ | |
5e1533c7 SK |
4746 | get_net(net); |
4747 | nfsd4_client_tracking_init(net); | |
2c142baa | 4748 | nn->boot_time = get_seconds(); |
5ccb0066 | 4749 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4750 | nn->grace_ended = false; |
9a8db97e | 4751 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4752 | nfsd4_grace); |
b5a1a81e | 4753 | ret = set_callback_cred(); |
a6d6b781 JL |
4754 | if (ret) { |
4755 | ret = -ENOMEM; | |
4756 | goto out_recovery; | |
4757 | } | |
58da282b | 4758 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4759 | if (laundry_wq == NULL) { |
4760 | ret = -ENOMEM; | |
4761 | goto out_recovery; | |
4762 | } | |
b5a1a81e BF |
4763 | ret = nfsd4_create_callback_queue(); |
4764 | if (ret) | |
4765 | goto out_free_laundry; | |
e46b498c | 4766 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4767 | set_max_delegations(); |
b5a1a81e BF |
4768 | return 0; |
4769 | out_free_laundry: | |
4770 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4771 | out_recovery: |
5e1533c7 SK |
4772 | nfsd4_client_tracking_exit(net); |
4773 | put_net(net); | |
b5a1a81e | 4774 | return ret; |
1da177e4 LT |
4775 | } |
4776 | ||
1da177e4 LT |
4777 | static void |
4778 | __nfs4_state_shutdown(void) | |
4779 | { | |
4780 | int i; | |
4781 | struct nfs4_client *clp = NULL; | |
4782 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4783 | struct list_head *pos, *next, reaplist; |
4784 | ||
1da177e4 LT |
4785 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4786 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4787 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
0d22f68f | 4788 | destroy_client(clp); |
1da177e4 LT |
4789 | } |
4790 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4791 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
0d22f68f | 4792 | destroy_client(clp); |
1da177e4 LT |
4793 | } |
4794 | } | |
4795 | INIT_LIST_HEAD(&reaplist); | |
4796 | spin_lock(&recall_lock); | |
4797 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4798 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4799 | list_move(&dp->dl_recall_lru, &reaplist); | |
4800 | } | |
4801 | spin_unlock(&recall_lock); | |
4802 | list_for_each_safe(pos, next, &reaplist) { | |
4803 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4804 | unhash_delegation(dp); |
4805 | } | |
4806 | ||
2a4317c5 JL |
4807 | nfsd4_client_tracking_exit(&init_net); |
4808 | put_net(&init_net); | |
1da177e4 LT |
4809 | } |
4810 | ||
4811 | void | |
4812 | nfs4_state_shutdown(void) | |
4813 | { | |
5e1533c7 SK |
4814 | struct net *net = &init_net; |
4815 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4816 | ||
afe2c511 | 4817 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4818 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4819 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4820 | nfs4_lock_state(); |
1da177e4 | 4821 | __nfs4_state_shutdown(); |
1da177e4 | 4822 | nfs4_unlock_state(); |
c3935e30 | 4823 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4824 | } |
8b70484c TM |
4825 | |
4826 | static void | |
4827 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4828 | { | |
37c593c5 TM |
4829 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4830 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4831 | } |
4832 | ||
4833 | static void | |
4834 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4835 | { | |
37c593c5 TM |
4836 | if (cstate->minorversion) { |
4837 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4838 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4839 | } | |
4840 | } | |
4841 | ||
4842 | void | |
4843 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4844 | { | |
4845 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4846 | } |
4847 | ||
62cd4a59 TM |
4848 | /* |
4849 | * functions to set current state id | |
4850 | */ | |
9428fe1a TM |
4851 | void |
4852 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4853 | { | |
4854 | put_stateid(cstate, &odp->od_stateid); | |
4855 | } | |
4856 | ||
8b70484c TM |
4857 | void |
4858 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4859 | { | |
4860 | put_stateid(cstate, &open->op_stateid); | |
4861 | } | |
4862 | ||
62cd4a59 TM |
4863 | void |
4864 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4865 | { | |
4866 | put_stateid(cstate, &close->cl_stateid); | |
4867 | } | |
4868 | ||
4869 | void | |
4870 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4871 | { | |
4872 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4873 | } | |
4874 | ||
4875 | /* | |
4876 | * functions to consume current state id | |
4877 | */ | |
1e97b519 | 4878 | |
9428fe1a TM |
4879 | void |
4880 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4881 | { | |
4882 | get_stateid(cstate, &odp->od_stateid); | |
4883 | } | |
4884 | ||
4885 | void | |
4886 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4887 | { | |
4888 | get_stateid(cstate, &drp->dr_stateid); | |
4889 | } | |
4890 | ||
1e97b519 TM |
4891 | void |
4892 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4893 | { | |
4894 | get_stateid(cstate, &fsp->fr_stateid); | |
4895 | } | |
4896 | ||
4897 | void | |
4898 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4899 | { | |
4900 | get_stateid(cstate, &setattr->sa_stateid); | |
4901 | } | |
4902 | ||
8b70484c TM |
4903 | void |
4904 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4905 | { | |
4906 | get_stateid(cstate, &close->cl_stateid); | |
4907 | } | |
4908 | ||
4909 | void | |
62cd4a59 | 4910 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4911 | { |
62cd4a59 | 4912 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4913 | } |
30813e27 TM |
4914 | |
4915 | void | |
4916 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4917 | { | |
4918 | get_stateid(cstate, &read->rd_stateid); | |
4919 | } | |
4920 | ||
4921 | void | |
4922 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4923 | { | |
4924 | get_stateid(cstate, &write->wr_stateid); | |
4925 | } |