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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); | |
57725155 | 343 | nfsd4_init_callback(&dp->dl_recall); |
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 | * | |
ac55fdc4 | 415 | * conf_id_hashtbl[], and conf_name_tree hold confirmed |
1da177e4 LT |
416 | * setclientid_confirmed info. |
417 | * | |
ac55fdc4 | 418 | * unconf_id_hashtbl[] and unconf_name_tree hold unconfirmed |
1da177e4 LT |
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. | |
ac55fdc4 JL |
426 | * |
427 | * All of the above fields are protected by the client_mutex. | |
1da177e4 LT |
428 | */ |
429 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
430 | static int reclaim_str_hashtbl_size = 0; | |
431 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
1da177e4 | 432 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
ac55fdc4 JL |
433 | static struct rb_root conf_name_tree; |
434 | static struct rb_root unconf_name_tree; | |
1da177e4 LT |
435 | static struct list_head client_lru; |
436 | static struct list_head close_lru; | |
437 | ||
f9d7562f BF |
438 | /* |
439 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
440 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
441 | * only what share bits are currently in force, but also what | |
442 | * combinations of share bits previous opens have used. This allows us | |
443 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
444 | * return an error if the client attempt to downgrade to a combination | |
445 | * of share bits not explicable by closing some of its previous opens. | |
446 | * | |
447 | * XXX: This enforcement is actually incomplete, since we don't keep | |
448 | * track of access/deny bit combinations; so, e.g., we allow: | |
449 | * | |
450 | * OPEN allow read, deny write | |
451 | * OPEN allow both, deny none | |
452 | * DOWNGRADE allow read, deny none | |
453 | * | |
454 | * which we should reject. | |
455 | */ | |
5ae037e5 JL |
456 | static unsigned int |
457 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 458 | int i; |
5ae037e5 | 459 | unsigned int access = 0; |
f9d7562f | 460 | |
f9d7562f BF |
461 | for (i = 1; i < 4; i++) { |
462 | if (test_bit(i, &bmap)) | |
5ae037e5 | 463 | access |= i; |
f9d7562f | 464 | } |
5ae037e5 | 465 | return access; |
f9d7562f BF |
466 | } |
467 | ||
3a328614 | 468 | static bool |
dcef0413 | 469 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
470 | unsigned int access, deny; |
471 | ||
5ae037e5 JL |
472 | access = bmap_to_share_mode(stp->st_access_bmap); |
473 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 474 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
475 | return false; |
476 | return true; | |
f9d7562f BF |
477 | } |
478 | ||
82c5ff1b JL |
479 | /* set share access for a given stateid */ |
480 | static inline void | |
481 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
482 | { | |
483 | __set_bit(access, &stp->st_access_bmap); | |
484 | } | |
485 | ||
486 | /* clear share access for a given stateid */ | |
487 | static inline void | |
488 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
489 | { | |
490 | __clear_bit(access, &stp->st_access_bmap); | |
491 | } | |
492 | ||
493 | /* test whether a given stateid has access */ | |
494 | static inline bool | |
495 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
496 | { | |
497 | return test_bit(access, &stp->st_access_bmap); | |
498 | } | |
499 | ||
ce0fc43c JL |
500 | /* set share deny for a given stateid */ |
501 | static inline void | |
502 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
503 | { | |
504 | __set_bit(access, &stp->st_deny_bmap); | |
505 | } | |
506 | ||
507 | /* clear share deny for a given stateid */ | |
508 | static inline void | |
509 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
510 | { | |
511 | __clear_bit(access, &stp->st_deny_bmap); | |
512 | } | |
513 | ||
514 | /* test whether a given stateid is denying specific access */ | |
515 | static inline bool | |
516 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
517 | { | |
518 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
519 | } |
520 | ||
521 | static int nfs4_access_to_omode(u32 access) | |
522 | { | |
8f34a430 | 523 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
524 | case NFS4_SHARE_ACCESS_READ: |
525 | return O_RDONLY; | |
526 | case NFS4_SHARE_ACCESS_WRITE: | |
527 | return O_WRONLY; | |
528 | case NFS4_SHARE_ACCESS_BOTH: | |
529 | return O_RDWR; | |
530 | } | |
531 | BUG(); | |
532 | } | |
533 | ||
82c5ff1b JL |
534 | /* release all access and file references for a given stateid */ |
535 | static void | |
536 | release_all_access(struct nfs4_ol_stateid *stp) | |
537 | { | |
538 | int i; | |
539 | ||
540 | for (i = 1; i < 4; i++) { | |
541 | if (test_access(i, stp)) | |
542 | nfs4_file_put_access(stp->st_file, | |
543 | nfs4_access_to_omode(i)); | |
544 | clear_access(i, stp); | |
545 | } | |
546 | } | |
547 | ||
dcef0413 | 548 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 549 | { |
529d7b2a BF |
550 | list_del(&stp->st_perfile); |
551 | list_del(&stp->st_perstateowner); | |
552 | } | |
553 | ||
dcef0413 | 554 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 555 | { |
82c5ff1b | 556 | release_all_access(stp); |
a96e5b90 | 557 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
558 | stp->st_file = NULL; |
559 | } | |
560 | ||
dcef0413 | 561 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 562 | { |
529d7b2a BF |
563 | kmem_cache_free(stateid_slab, stp); |
564 | } | |
565 | ||
dcef0413 | 566 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
567 | { |
568 | struct file *file; | |
569 | ||
570 | unhash_generic_stateid(stp); | |
6136d2b4 | 571 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
572 | file = find_any_file(stp->st_file); |
573 | if (file) | |
fe0750e5 | 574 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 575 | close_generic_stateid(stp); |
529d7b2a BF |
576 | free_generic_stateid(stp); |
577 | } | |
578 | ||
fe0750e5 | 579 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 580 | { |
dcef0413 | 581 | struct nfs4_ol_stateid *stp; |
529d7b2a | 582 | |
fe0750e5 BF |
583 | list_del(&lo->lo_owner.so_strhash); |
584 | list_del(&lo->lo_perstateid); | |
009673b4 | 585 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
586 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
587 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 588 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
589 | release_lock_stateid(stp); |
590 | } | |
591 | } | |
592 | ||
fe0750e5 | 593 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 594 | { |
fe0750e5 BF |
595 | unhash_lockowner(lo); |
596 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
597 | } |
598 | ||
599 | static void | |
dcef0413 | 600 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 601 | { |
fe0750e5 | 602 | struct nfs4_lockowner *lo; |
529d7b2a BF |
603 | |
604 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
605 | lo = list_entry(open_stp->st_lockowners.next, |
606 | struct nfs4_lockowner, lo_perstateid); | |
607 | release_lockowner(lo); | |
529d7b2a BF |
608 | } |
609 | } | |
610 | ||
38c387b5 | 611 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
612 | { |
613 | unhash_generic_stateid(stp); | |
614 | release_stateid_lockowners(stp); | |
38c387b5 BF |
615 | close_generic_stateid(stp); |
616 | } | |
617 | ||
618 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
619 | { | |
620 | unhash_open_stateid(stp); | |
6136d2b4 | 621 | unhash_stid(&stp->st_stid); |
2283963f BF |
622 | free_generic_stateid(stp); |
623 | } | |
624 | ||
fe0750e5 | 625 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 626 | { |
dcef0413 | 627 | struct nfs4_ol_stateid *stp; |
f1d110ca | 628 | |
fe0750e5 BF |
629 | list_del(&oo->oo_owner.so_strhash); |
630 | list_del(&oo->oo_perclient); | |
631 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
632 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 633 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 634 | release_open_stateid(stp); |
f1d110ca BF |
635 | } |
636 | } | |
637 | ||
f7a4d872 BF |
638 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
639 | { | |
640 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
641 | ||
642 | if (s) { | |
6136d2b4 | 643 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
644 | free_generic_stateid(s); |
645 | oo->oo_last_closed_stid = NULL; | |
646 | } | |
647 | } | |
648 | ||
fe0750e5 | 649 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 650 | { |
fe0750e5 BF |
651 | unhash_openowner(oo); |
652 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 653 | release_last_closed_stateid(oo); |
fe0750e5 | 654 | nfs4_free_openowner(oo); |
f1d110ca BF |
655 | } |
656 | ||
5282fd72 ME |
657 | #define SESSION_HASH_SIZE 512 |
658 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
659 | ||
660 | static inline int | |
661 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
662 | { | |
663 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
664 | ||
665 | return sid->sequence % SESSION_HASH_SIZE; | |
666 | } | |
667 | ||
8f199b82 | 668 | #ifdef NFSD_DEBUG |
5282fd72 ME |
669 | static inline void |
670 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
671 | { | |
672 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
673 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
674 | } | |
8f199b82 TM |
675 | #else |
676 | static inline void | |
677 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
678 | { | |
679 | } | |
680 | #endif | |
681 | ||
5282fd72 | 682 | |
ec6b5d7b AA |
683 | static void |
684 | gen_sessionid(struct nfsd4_session *ses) | |
685 | { | |
686 | struct nfs4_client *clp = ses->se_client; | |
687 | struct nfsd4_sessionid *sid; | |
688 | ||
689 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
690 | sid->clientid = clp->cl_clientid; | |
691 | sid->sequence = current_sessionid++; | |
692 | sid->reserved = 0; | |
693 | } | |
694 | ||
695 | /* | |
a649637c AA |
696 | * The protocol defines ca_maxresponssize_cached to include the size of |
697 | * the rpc header, but all we need to cache is the data starting after | |
698 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
699 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
700 | * value that is the number of bytes in our cache plus a few additional | |
701 | * bytes. In order to stay on the safe side, and not promise more than | |
702 | * we can cache, those additional bytes must be the minimum possible: 24 | |
703 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
704 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
705 | * for the SEQUENCE op response: | |
706 | */ | |
707 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
708 | ||
557ce264 AA |
709 | static void |
710 | free_session_slots(struct nfsd4_session *ses) | |
711 | { | |
712 | int i; | |
713 | ||
714 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
715 | kfree(ses->se_slots[i]); | |
716 | } | |
717 | ||
a649637c | 718 | /* |
efe0cb6d BF |
719 | * We don't actually need to cache the rpc and session headers, so we |
720 | * can allocate a little less for each slot: | |
721 | */ | |
722 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
723 | { | |
724 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
725 | } | |
726 | ||
5b6feee9 | 727 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 728 | { |
5b6feee9 BF |
729 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
730 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 731 | |
5b6feee9 BF |
732 | return size; |
733 | } | |
ec6b5d7b | 734 | |
5b6feee9 BF |
735 | /* |
736 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 737 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 738 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 739 | */ |
5b6feee9 | 740 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 741 | { |
5b6feee9 | 742 | int avail; |
ec6b5d7b | 743 | |
5b6feee9 | 744 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 745 | |
5b6feee9 BF |
746 | spin_lock(&nfsd_drc_lock); |
747 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
748 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
749 | num = min_t(int, num, avail / slotsize); | |
750 | nfsd_drc_mem_used += num * slotsize; | |
751 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 752 | |
5b6feee9 BF |
753 | return num; |
754 | } | |
ec6b5d7b | 755 | |
5b6feee9 BF |
756 | static void nfsd4_put_drc_mem(int slotsize, int num) |
757 | { | |
4bd9b0f4 | 758 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 759 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 760 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 761 | } |
ec6b5d7b | 762 | |
a827bcb2 | 763 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
5b6feee9 BF |
764 | { |
765 | struct nfsd4_session *new; | |
766 | int mem, i; | |
a649637c | 767 | |
5b6feee9 BF |
768 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
769 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
770 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 771 | |
5b6feee9 BF |
772 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
773 | if (!new) | |
774 | return NULL; | |
557ce264 | 775 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
776 | for (i = 0; i < numslots; i++) { |
777 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
778 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
779 | if (!new->se_slots[i]) | |
557ce264 | 780 | goto out_free; |
557ce264 | 781 | } |
5b6feee9 BF |
782 | return new; |
783 | out_free: | |
784 | while (i--) | |
785 | kfree(new->se_slots[i]); | |
786 | kfree(new); | |
787 | return NULL; | |
ec6b5d7b AA |
788 | } |
789 | ||
5b6feee9 | 790 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 791 | { |
5b6feee9 | 792 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 793 | |
5b6feee9 | 794 | new->maxreqs = numslots; |
d2b21743 MJ |
795 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
796 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
797 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
798 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
799 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
800 | } | |
ec6b5d7b | 801 | |
19cf5c02 BF |
802 | static void free_conn(struct nfsd4_conn *c) |
803 | { | |
804 | svc_xprt_put(c->cn_xprt); | |
805 | kfree(c); | |
806 | } | |
ec6b5d7b | 807 | |
19cf5c02 BF |
808 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
809 | { | |
810 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
811 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 812 | |
19cf5c02 BF |
813 | spin_lock(&clp->cl_lock); |
814 | if (!list_empty(&c->cn_persession)) { | |
815 | list_del(&c->cn_persession); | |
816 | free_conn(c); | |
817 | } | |
818 | spin_unlock(&clp->cl_lock); | |
eea49806 | 819 | nfsd4_probe_callback(clp); |
19cf5c02 | 820 | } |
ec6b5d7b | 821 | |
d29c374c | 822 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 823 | { |
c7662518 | 824 | struct nfsd4_conn *conn; |
ec6b5d7b | 825 | |
c7662518 BF |
826 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
827 | if (!conn) | |
db90681d | 828 | return NULL; |
c7662518 BF |
829 | svc_xprt_get(rqstp->rq_xprt); |
830 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 831 | conn->cn_flags = flags; |
db90681d BF |
832 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
833 | return conn; | |
834 | } | |
a649637c | 835 | |
328ead28 BF |
836 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
837 | { | |
838 | conn->cn_session = ses; | |
839 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
840 | } |
841 | ||
db90681d | 842 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 843 | { |
db90681d | 844 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 845 | |
c7662518 | 846 | spin_lock(&clp->cl_lock); |
328ead28 | 847 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 848 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
849 | } |
850 | ||
21b75b01 | 851 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 852 | { |
19cf5c02 | 853 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 854 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
855 | } |
856 | ||
e1ff371f | 857 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 858 | { |
21b75b01 | 859 | int ret; |
ec6b5d7b | 860 | |
db90681d | 861 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
862 | ret = nfsd4_register_conn(conn); |
863 | if (ret) | |
864 | /* oops; xprt is already down: */ | |
865 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
6a3b1563 | 866 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
24119673 WAA |
867 | /* callback channel may be back up */ |
868 | nfsd4_probe_callback(ses->se_client); | |
869 | } | |
c7662518 | 870 | } |
ec6b5d7b | 871 | |
e1ff371f | 872 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
873 | { |
874 | u32 dir = NFS4_CDFC4_FORE; | |
875 | ||
e1ff371f | 876 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 877 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 878 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
879 | } |
880 | ||
881 | /* must be called under client_lock */ | |
19cf5c02 | 882 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 883 | { |
19cf5c02 BF |
884 | struct nfs4_client *clp = s->se_client; |
885 | struct nfsd4_conn *c; | |
ec6b5d7b | 886 | |
19cf5c02 BF |
887 | spin_lock(&clp->cl_lock); |
888 | while (!list_empty(&s->se_conns)) { | |
889 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
890 | list_del_init(&c->cn_persession); | |
891 | spin_unlock(&clp->cl_lock); | |
557ce264 | 892 | |
19cf5c02 BF |
893 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
894 | free_conn(c); | |
ec6b5d7b | 895 | |
19cf5c02 BF |
896 | spin_lock(&clp->cl_lock); |
897 | } | |
898 | spin_unlock(&clp->cl_lock); | |
c7662518 | 899 | } |
ec6b5d7b | 900 | |
1377b69e BF |
901 | static void __free_session(struct nfsd4_session *ses) |
902 | { | |
903 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); | |
904 | free_session_slots(ses); | |
905 | kfree(ses); | |
906 | } | |
907 | ||
508dc6e1 | 908 | static void free_session(struct kref *kref) |
c7662518 BF |
909 | { |
910 | struct nfsd4_session *ses; | |
c7662518 | 911 | |
bc2df47a | 912 | lockdep_assert_held(&client_lock); |
c7662518 | 913 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 914 | nfsd4_del_conns(ses); |
1377b69e | 915 | __free_session(ses); |
c7662518 BF |
916 | } |
917 | ||
508dc6e1 BH |
918 | void nfsd4_put_session(struct nfsd4_session *ses) |
919 | { | |
920 | spin_lock(&client_lock); | |
921 | nfsd4_put_session_locked(ses); | |
922 | spin_unlock(&client_lock); | |
923 | } | |
924 | ||
a827bcb2 | 925 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) |
5b6feee9 BF |
926 | { |
927 | struct nfsd4_session *new; | |
5b6feee9 | 928 | int numslots, slotsize; |
5b6feee9 BF |
929 | /* |
930 | * Note decreasing slot size below client's request may | |
931 | * make it difficult for client to function correctly, whereas | |
932 | * decreasing the number of slots will (just?) affect | |
933 | * performance. When short on memory we therefore prefer to | |
934 | * decrease number of slots instead of their size. | |
935 | */ | |
936 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
937 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
938 | if (numslots < 1) |
939 | return NULL; | |
5b6feee9 | 940 | |
a827bcb2 | 941 | new = __alloc_session(slotsize, numslots); |
5b6feee9 BF |
942 | if (!new) { |
943 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 944 | return NULL; |
557ce264 | 945 | } |
5b6feee9 | 946 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
a827bcb2 BF |
947 | return new; |
948 | } | |
557ce264 | 949 | |
135ae827 | 950 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 951 | { |
a827bcb2 BF |
952 | int idx; |
953 | ||
ec6b5d7b AA |
954 | new->se_client = clp; |
955 | gen_sessionid(new); | |
ec6b5d7b | 956 | |
c7662518 BF |
957 | INIT_LIST_HEAD(&new->se_conns); |
958 | ||
ac7c46f2 | 959 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 960 | new->se_flags = cses->flags; |
8b5ce5cd | 961 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 962 | new->se_cb_sec = cses->cb_sec; |
ec6b5d7b | 963 | kref_init(&new->se_ref); |
5b6feee9 | 964 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 965 | spin_lock(&client_lock); |
ec6b5d7b | 966 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 967 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 968 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 969 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 970 | spin_unlock(&client_lock); |
ec6b5d7b | 971 | |
dcbeaa68 | 972 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 973 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
974 | /* |
975 | * This is a little silly; with sessions there's no real | |
976 | * use for the callback address. Use the peer address | |
977 | * as a reasonable default for now, but consider fixing | |
978 | * the rpc client not to require an address in the | |
979 | * future: | |
980 | */ | |
edd76786 BF |
981 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
982 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 983 | } |
ec6b5d7b AA |
984 | } |
985 | ||
9089f1b4 | 986 | /* caller must hold client_lock */ |
5282fd72 ME |
987 | static struct nfsd4_session * |
988 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
989 | { | |
990 | struct nfsd4_session *elem; | |
991 | int idx; | |
992 | ||
993 | dump_sessionid(__func__, sessionid); | |
994 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
995 | /* Search in the appropriate list */ |
996 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
997 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
998 | NFS4_MAX_SESSIONID_LEN)) { | |
999 | return elem; | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | dprintk("%s: session not found\n", __func__); | |
1004 | return NULL; | |
1005 | } | |
1006 | ||
9089f1b4 | 1007 | /* caller must hold client_lock */ |
7116ed6b | 1008 | static void |
5282fd72 | 1009 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1010 | { |
1011 | list_del(&ses->se_hash); | |
4c649378 | 1012 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1013 | list_del(&ses->se_perclnt); |
4c649378 | 1014 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1015 | } |
1016 | ||
36acb66b | 1017 | /* must be called under the client_lock */ |
1da177e4 | 1018 | static inline void |
36acb66b | 1019 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1020 | { |
07cd4909 | 1021 | if (is_client_expired(clp)) { |
7447758b BF |
1022 | WARN_ON(1); |
1023 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1024 | __func__, |
1025 | clp->cl_clientid.cl_boot, | |
1026 | clp->cl_clientid.cl_id); | |
1027 | return; | |
1028 | } | |
1029 | ||
1da177e4 LT |
1030 | dprintk("renewing client (clientid %08x/%08x)\n", |
1031 | clp->cl_clientid.cl_boot, | |
1032 | clp->cl_clientid.cl_id); | |
1033 | list_move_tail(&clp->cl_lru, &client_lru); | |
1034 | clp->cl_time = get_seconds(); | |
1035 | } | |
1036 | ||
36acb66b BH |
1037 | static inline void |
1038 | renew_client(struct nfs4_client *clp) | |
1039 | { | |
1040 | spin_lock(&client_lock); | |
1041 | renew_client_locked(clp); | |
1042 | spin_unlock(&client_lock); | |
1043 | } | |
1044 | ||
1da177e4 LT |
1045 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1046 | static int | |
2c142baa | 1047 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1048 | { |
2c142baa | 1049 | if (clid->cl_boot == nn->boot_time) |
1da177e4 | 1050 | return 0; |
60adfc50 | 1051 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
2c142baa | 1052 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1053 | return 1; |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * XXX Should we use a slab cache ? | |
1058 | * This type of memory management is somewhat inefficient, but we use it | |
1059 | * anyway since SETCLIENTID is not a common operation. | |
1060 | */ | |
35bba9a3 | 1061 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1062 | { |
1063 | struct nfs4_client *clp; | |
1064 | ||
35bba9a3 BF |
1065 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1066 | if (clp == NULL) | |
1067 | return NULL; | |
67114fe6 | 1068 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1069 | if (clp->cl_name.data == NULL) { |
1070 | kfree(clp); | |
1071 | return NULL; | |
1da177e4 | 1072 | } |
35bba9a3 | 1073 | clp->cl_name.len = name.len; |
1da177e4 LT |
1074 | return clp; |
1075 | } | |
1076 | ||
1077 | static inline void | |
1078 | free_client(struct nfs4_client *clp) | |
1079 | { | |
bc2df47a | 1080 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1081 | while (!list_empty(&clp->cl_sessions)) { |
1082 | struct nfsd4_session *ses; | |
1083 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1084 | se_perclnt); | |
1085 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1086 | nfsd4_put_session_locked(ses); |
792c95dd | 1087 | } |
03a4e1f6 | 1088 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1089 | kfree(clp->cl_name.data); |
1090 | kfree(clp); | |
1091 | } | |
1092 | ||
d7682988 BH |
1093 | void |
1094 | release_session_client(struct nfsd4_session *session) | |
1095 | { | |
1096 | struct nfs4_client *clp = session->se_client; | |
1097 | ||
1098 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1099 | return; | |
1100 | if (is_client_expired(clp)) { | |
1101 | free_client(clp); | |
1102 | session->se_client = NULL; | |
1103 | } else | |
1104 | renew_client_locked(clp); | |
1105 | spin_unlock(&client_lock); | |
d7682988 BH |
1106 | } |
1107 | ||
84d38ac9 BH |
1108 | /* must be called under the client_lock */ |
1109 | static inline void | |
1110 | unhash_client_locked(struct nfs4_client *clp) | |
1111 | { | |
792c95dd BF |
1112 | struct nfsd4_session *ses; |
1113 | ||
07cd4909 | 1114 | mark_client_expired(clp); |
84d38ac9 | 1115 | list_del(&clp->cl_lru); |
4c649378 | 1116 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1117 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1118 | list_del_init(&ses->se_hash); | |
4c649378 | 1119 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1120 | } |
1121 | ||
1da177e4 | 1122 | static void |
0d22f68f | 1123 | destroy_client(struct nfs4_client *clp) |
1da177e4 | 1124 | { |
fe0750e5 | 1125 | struct nfs4_openowner *oo; |
1da177e4 | 1126 | struct nfs4_delegation *dp; |
1da177e4 LT |
1127 | struct list_head reaplist; |
1128 | ||
1da177e4 LT |
1129 | INIT_LIST_HEAD(&reaplist); |
1130 | spin_lock(&recall_lock); | |
ea1da636 N |
1131 | while (!list_empty(&clp->cl_delegations)) { |
1132 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1133 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1134 | list_move(&dp->dl_recall_lru, &reaplist); |
1135 | } | |
1136 | spin_unlock(&recall_lock); | |
1137 | while (!list_empty(&reaplist)) { | |
1138 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1139 | unhash_delegation(dp); |
1140 | } | |
ea1da636 | 1141 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1142 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1143 | release_openowner(oo); | |
1da177e4 | 1144 | } |
6ff8da08 | 1145 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1146 | if (clp->cl_cb_conn.cb_xprt) |
1147 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b | 1148 | list_del(&clp->cl_idhash); |
ac55fdc4 JL |
1149 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
1150 | rb_erase(&clp->cl_namenode, &conf_name_tree); | |
1151 | else | |
1152 | rb_erase(&clp->cl_namenode, &unconf_name_tree); | |
be1fdf6c | 1153 | spin_lock(&client_lock); |
84d38ac9 | 1154 | unhash_client_locked(clp); |
46583e25 BH |
1155 | if (atomic_read(&clp->cl_refcount) == 0) |
1156 | free_client(clp); | |
be1fdf6c | 1157 | spin_unlock(&client_lock); |
1da177e4 LT |
1158 | } |
1159 | ||
0d22f68f BF |
1160 | static void expire_client(struct nfs4_client *clp) |
1161 | { | |
1162 | nfsd4_client_record_remove(clp); | |
1163 | destroy_client(clp); | |
1164 | } | |
1165 | ||
35bba9a3 BF |
1166 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1167 | { | |
1168 | memcpy(target->cl_verifier.data, source->data, | |
1169 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1170 | } |
1171 | ||
35bba9a3 BF |
1172 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1173 | { | |
1da177e4 LT |
1174 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1175 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1176 | } | |
1177 | ||
03a4e1f6 | 1178 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1179 | { |
03a4e1f6 BF |
1180 | if (source->cr_principal) { |
1181 | target->cr_principal = | |
1182 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1183 | if (target->cr_principal == NULL) | |
1184 | return -ENOMEM; | |
1185 | } else | |
1186 | target->cr_principal = NULL; | |
d5497fc6 | 1187 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1188 | target->cr_uid = source->cr_uid; |
1189 | target->cr_gid = source->cr_gid; | |
1190 | target->cr_group_info = source->cr_group_info; | |
1191 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1192 | return 0; |
1da177e4 LT |
1193 | } |
1194 | ||
ac55fdc4 JL |
1195 | static long long |
1196 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) | |
1197 | { | |
1198 | long long res; | |
1199 | ||
1200 | res = o1->len - o2->len; | |
1201 | if (res) | |
1202 | return res; | |
1203 | return (long long)memcmp(o1->data, o2->data, o1->len); | |
1204 | } | |
1205 | ||
35bba9a3 | 1206 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1207 | { |
a55370a3 | 1208 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1209 | } |
1210 | ||
1211 | static int | |
599e0a22 BF |
1212 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1213 | { | |
1214 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1215 | } |
1216 | ||
1217 | static int | |
599e0a22 BF |
1218 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1219 | { | |
1220 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1221 | } |
1222 | ||
8fbba96e BF |
1223 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1224 | { | |
1225 | int i; | |
1226 | ||
1227 | if (g1->ngroups != g2->ngroups) | |
1228 | return false; | |
1229 | for (i=0; i<g1->ngroups; i++) | |
1230 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1231 | return false; | |
1232 | return true; | |
1233 | } | |
1234 | ||
68eb3508 BF |
1235 | /* |
1236 | * RFC 3530 language requires clid_inuse be returned when the | |
1237 | * "principal" associated with a requests differs from that previously | |
1238 | * used. We use uid, gid's, and gss principal string as our best | |
1239 | * approximation. We also don't want to allow non-gss use of a client | |
1240 | * established using gss: in theory cr_principal should catch that | |
1241 | * change, but in practice cr_principal can be null even in the gss case | |
1242 | * since gssd doesn't always pass down a principal string. | |
1243 | */ | |
1244 | static bool is_gss_cred(struct svc_cred *cr) | |
1245 | { | |
1246 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
1247 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
1248 | } | |
1249 | ||
1250 | ||
5559b50a | 1251 | static bool |
599e0a22 BF |
1252 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1253 | { | |
68eb3508 | 1254 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
d5497fc6 | 1255 | || (cr1->cr_uid != cr2->cr_uid) |
8fbba96e BF |
1256 | || (cr1->cr_gid != cr2->cr_gid) |
1257 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1258 | return false; | |
1259 | if (cr1->cr_principal == cr2->cr_principal) | |
1260 | return true; | |
1261 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1262 | return false; | |
5559b50a | 1263 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
1264 | } |
1265 | ||
5ec7b46c BF |
1266 | static void gen_clid(struct nfs4_client *clp) |
1267 | { | |
1268 | static u32 current_clientid = 1; | |
2c142baa | 1269 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
5ec7b46c | 1270 | |
2c142baa | 1271 | clp->cl_clientid.cl_boot = nn->boot_time; |
1da177e4 LT |
1272 | clp->cl_clientid.cl_id = current_clientid++; |
1273 | } | |
1274 | ||
deda2faa BF |
1275 | static void gen_confirm(struct nfs4_client *clp) |
1276 | { | |
ab4684d1 | 1277 | __be32 verf[2]; |
deda2faa | 1278 | static u32 i; |
1da177e4 | 1279 | |
ab4684d1 CL |
1280 | verf[0] = (__be32)get_seconds(); |
1281 | verf[1] = (__be32)i++; | |
1282 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1283 | } |
1284 | ||
38c2f4b1 | 1285 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1286 | { |
38c2f4b1 | 1287 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1288 | } |
1289 | ||
38c2f4b1 | 1290 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1291 | { |
1292 | struct nfs4_stid *s; | |
4d71ab87 | 1293 | |
38c2f4b1 | 1294 | s = find_stateid(cl, t); |
4d71ab87 BF |
1295 | if (!s) |
1296 | return NULL; | |
f459e453 | 1297 | if (typemask & s->sc_type) |
4581d140 | 1298 | return s; |
4581d140 BF |
1299 | return NULL; |
1300 | } | |
1301 | ||
2216d449 | 1302 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
1303 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
1304 | { | |
1305 | struct nfs4_client *clp; | |
1306 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1307 | int ret; |
b09333c4 RL |
1308 | |
1309 | clp = alloc_client(name); | |
1310 | if (clp == NULL) | |
1311 | return NULL; | |
1312 | ||
792c95dd | 1313 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1314 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1315 | if (ret) { | |
1316 | spin_lock(&client_lock); | |
1317 | free_client(clp); | |
1318 | spin_unlock(&client_lock); | |
1319 | return NULL; | |
b09333c4 | 1320 | } |
38c2f4b1 | 1321 | idr_init(&clp->cl_stateids); |
46583e25 | 1322 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1323 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 | 1324 | INIT_LIST_HEAD(&clp->cl_idhash); |
b09333c4 RL |
1325 | INIT_LIST_HEAD(&clp->cl_openowners); |
1326 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1327 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1328 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1329 | spin_lock_init(&clp->cl_lock); |
57725155 | 1330 | nfsd4_init_callback(&clp->cl_cb_null); |
07cd4909 | 1331 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1332 | clear_bit(0, &clp->cl_cb_slot_busy); |
1333 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1334 | copy_verf(clp, verf); | |
1335 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1336 | gen_confirm(clp); |
edd76786 | 1337 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1338 | return clp; |
1339 | } | |
1340 | ||
fd39ca9a | 1341 | static void |
ac55fdc4 JL |
1342 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
1343 | { | |
1344 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
1345 | struct nfs4_client *clp; | |
1346 | ||
1347 | while (*new) { | |
1348 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
1349 | parent = *new; | |
1350 | ||
1351 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
1352 | new = &((*new)->rb_left); | |
1353 | else | |
1354 | new = &((*new)->rb_right); | |
1355 | } | |
1356 | ||
1357 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
1358 | rb_insert_color(&new_clp->cl_namenode, root); | |
1359 | } | |
1360 | ||
1361 | static struct nfs4_client * | |
1362 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
1363 | { | |
1364 | long long cmp; | |
1365 | struct rb_node *node = root->rb_node; | |
1366 | struct nfs4_client *clp; | |
1367 | ||
1368 | while (node) { | |
1369 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
1370 | cmp = compare_blob(&clp->cl_name, name); | |
1371 | if (cmp > 0) | |
1372 | node = node->rb_left; | |
1373 | else if (cmp < 0) | |
1374 | node = node->rb_right; | |
1375 | else | |
1376 | return clp; | |
1377 | } | |
1378 | return NULL; | |
1379 | } | |
1380 | ||
1381 | static void | |
1382 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
1383 | { |
1384 | unsigned int idhashval; | |
1385 | ||
ac55fdc4 JL |
1386 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
1387 | add_clp_to_name_tree(clp, &unconf_name_tree); | |
1da177e4 LT |
1388 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
1389 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1390 | renew_client(clp); |
1da177e4 LT |
1391 | } |
1392 | ||
fd39ca9a | 1393 | static void |
1da177e4 LT |
1394 | move_to_confirmed(struct nfs4_client *clp) |
1395 | { | |
1396 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1da177e4 LT |
1397 | |
1398 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1399 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
ac55fdc4 JL |
1400 | rb_erase(&clp->cl_namenode, &unconf_name_tree); |
1401 | add_clp_to_name_tree(clp, &conf_name_tree); | |
1402 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); | |
1da177e4 LT |
1403 | renew_client(clp); |
1404 | } | |
1405 | ||
1406 | static struct nfs4_client * | |
d15c077e | 1407 | find_confirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1408 | { |
1409 | struct nfs4_client *clp; | |
1410 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1411 | ||
1412 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 | 1413 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
1414 | if ((bool)clp->cl_minorversion != sessions) |
1415 | return NULL; | |
a50d2ad1 | 1416 | renew_client(clp); |
1da177e4 | 1417 | return clp; |
a50d2ad1 | 1418 | } |
1da177e4 LT |
1419 | } |
1420 | return NULL; | |
1421 | } | |
1422 | ||
1423 | static struct nfs4_client * | |
d15c077e | 1424 | find_unconfirmed_client(clientid_t *clid, bool sessions) |
1da177e4 LT |
1425 | { |
1426 | struct nfs4_client *clp; | |
1427 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1428 | ||
1429 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
d15c077e BF |
1430 | if (same_clid(&clp->cl_clientid, clid)) { |
1431 | if ((bool)clp->cl_minorversion != sessions) | |
1432 | return NULL; | |
1da177e4 | 1433 | return clp; |
d15c077e | 1434 | } |
1da177e4 LT |
1435 | } |
1436 | return NULL; | |
1437 | } | |
1438 | ||
6e5f15c9 | 1439 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1440 | { |
6e5f15c9 | 1441 | return clp->cl_exchange_flags != 0; |
e203d506 | 1442 | } |
a1bcecd2 | 1443 | |
28ce6054 | 1444 | static struct nfs4_client * |
ac55fdc4 | 1445 | find_confirmed_client_by_name(struct xdr_netobj *name) |
28ce6054 | 1446 | { |
ac55fdc4 | 1447 | return find_clp_in_name_tree(name, &conf_name_tree); |
28ce6054 N |
1448 | } |
1449 | ||
1450 | static struct nfs4_client * | |
ac55fdc4 | 1451 | find_unconfirmed_client_by_name(struct xdr_netobj *name) |
28ce6054 | 1452 | { |
ac55fdc4 | 1453 | return find_clp_in_name_tree(name, &unconf_name_tree); |
28ce6054 N |
1454 | } |
1455 | ||
fd39ca9a | 1456 | static void |
6f3d772f | 1457 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1458 | { |
07263f1e | 1459 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1460 | struct sockaddr *sa = svc_addr(rqstp); |
1461 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1462 | unsigned short expected_family; |
1463 | ||
1464 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1465 | if (se->se_callback_netid_len == 3 && | |
1466 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1467 | expected_family = AF_INET; | |
1468 | else if (se->se_callback_netid_len == 4 && | |
1469 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1470 | expected_family = AF_INET6; | |
1471 | else | |
1da177e4 LT |
1472 | goto out_err; |
1473 | ||
f2ac4dc9 | 1474 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1475 | se->se_callback_addr_len, |
07263f1e BF |
1476 | (struct sockaddr *)&conn->cb_addr, |
1477 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1478 | |
07263f1e | 1479 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1480 | goto out_err; |
aa9a4ec7 | 1481 | |
07263f1e BF |
1482 | if (conn->cb_addr.ss_family == AF_INET6) |
1483 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1484 | |
07263f1e BF |
1485 | conn->cb_prog = se->se_callback_prog; |
1486 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1487 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1488 | return; |
1489 | out_err: | |
07263f1e BF |
1490 | conn->cb_addr.ss_family = AF_UNSPEC; |
1491 | conn->cb_addrlen = 0; | |
849823c5 | 1492 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1493 | "will not receive delegations\n", |
1494 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1495 | ||
1da177e4 LT |
1496 | return; |
1497 | } | |
1498 | ||
074fe897 | 1499 | /* |
557ce264 | 1500 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1501 | */ |
074fe897 AA |
1502 | void |
1503 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1504 | { |
557ce264 AA |
1505 | struct nfsd4_slot *slot = resp->cstate.slot; |
1506 | unsigned int base; | |
074fe897 | 1507 | |
557ce264 | 1508 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1509 | |
557ce264 AA |
1510 | slot->sl_opcnt = resp->opcnt; |
1511 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1512 | |
bf5c43c8 | 1513 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1514 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1515 | slot->sl_datalen = 0; |
bf864a31 | 1516 | return; |
074fe897 | 1517 | } |
557ce264 AA |
1518 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1519 | base = (char *)resp->cstate.datap - | |
1520 | (char *)resp->xbuf->head[0].iov_base; | |
1521 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1522 | slot->sl_datalen)) | |
1523 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1524 | return; | |
074fe897 AA |
1525 | } |
1526 | ||
1527 | /* | |
abfabf8c AA |
1528 | * Encode the replay sequence operation from the slot values. |
1529 | * If cachethis is FALSE encode the uncached rep error on the next | |
1530 | * operation which sets resp->p and increments resp->opcnt for | |
1531 | * nfs4svc_encode_compoundres. | |
074fe897 | 1532 | * |
074fe897 | 1533 | */ |
abfabf8c AA |
1534 | static __be32 |
1535 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1536 | struct nfsd4_compoundres *resp) | |
074fe897 | 1537 | { |
abfabf8c AA |
1538 | struct nfsd4_op *op; |
1539 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1540 | |
abfabf8c AA |
1541 | /* Encode the replayed sequence operation */ |
1542 | op = &args->ops[resp->opcnt - 1]; | |
1543 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1544 | |
abfabf8c | 1545 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1546 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1547 | op = &args->ops[resp->opcnt++]; |
1548 | op->status = nfserr_retry_uncached_rep; | |
1549 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1550 | } |
abfabf8c | 1551 | return op->status; |
074fe897 AA |
1552 | } |
1553 | ||
1554 | /* | |
557ce264 AA |
1555 | * The sequence operation is not cached because we can use the slot and |
1556 | * session values. | |
074fe897 AA |
1557 | */ |
1558 | __be32 | |
bf864a31 AA |
1559 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1560 | struct nfsd4_sequence *seq) | |
074fe897 | 1561 | { |
557ce264 | 1562 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1563 | __be32 status; |
1564 | ||
557ce264 | 1565 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1566 | |
abfabf8c AA |
1567 | /* Either returns 0 or nfserr_retry_uncached */ |
1568 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1569 | if (status == nfserr_retry_uncached_rep) | |
1570 | return status; | |
074fe897 | 1571 | |
557ce264 AA |
1572 | /* The sequence operation has been encoded, cstate->datap set. */ |
1573 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1574 | |
557ce264 AA |
1575 | resp->opcnt = slot->sl_opcnt; |
1576 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1577 | status = slot->sl_status; | |
074fe897 AA |
1578 | |
1579 | return status; | |
1580 | } | |
1581 | ||
0733d213 AA |
1582 | /* |
1583 | * Set the exchange_id flags returned by the server. | |
1584 | */ | |
1585 | static void | |
1586 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1587 | { | |
1588 | /* pNFS is not supported */ | |
1589 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1590 | ||
1591 | /* Referrals are supported, Migration is not. */ | |
1592 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1593 | ||
1594 | /* set the wire flags to return to client. */ | |
1595 | clid->flags = new->cl_exchange_flags; | |
1596 | } | |
1597 | ||
631fc9ea BF |
1598 | static bool client_has_state(struct nfs4_client *clp) |
1599 | { | |
1600 | /* | |
1601 | * Note clp->cl_openowners check isn't quite right: there's no | |
1602 | * need to count owners without stateid's. | |
1603 | * | |
1604 | * Also note we should probably be using this in 4.0 case too. | |
1605 | */ | |
6eccece9 BF |
1606 | return !list_empty(&clp->cl_openowners) |
1607 | || !list_empty(&clp->cl_delegations) | |
1608 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1609 | } |
1610 | ||
069b6ad4 AA |
1611 | __be32 |
1612 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1613 | struct nfsd4_compound_state *cstate, | |
1614 | struct nfsd4_exchange_id *exid) | |
1615 | { | |
0733d213 | 1616 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1617 | __be32 status; |
363168b4 | 1618 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1619 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1620 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1621 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1622 | |
363168b4 | 1623 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1624 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1625 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1626 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1627 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1628 | |
a084daf5 | 1629 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1630 | return nfserr_inval; |
1631 | ||
1632 | /* Currently only support SP4_NONE */ | |
1633 | switch (exid->spa_how) { | |
1634 | case SP4_NONE: | |
1635 | break; | |
1636 | case SP4_SSV: | |
044bc1d4 | 1637 | return nfserr_serverfault; |
0733d213 AA |
1638 | default: |
1639 | BUG(); /* checked by xdr code */ | |
1640 | case SP4_MACH_CRED: | |
1641 | return nfserr_serverfault; /* no excuse :-/ */ | |
1642 | } | |
1643 | ||
2dbb269d | 1644 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1645 | nfs4_lock_state(); |
ac55fdc4 | 1646 | conf = find_confirmed_client_by_name(&exid->clname); |
0733d213 | 1647 | if (conf) { |
83e08fd4 BF |
1648 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1649 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1650 | ||
136e658d BF |
1651 | if (update) { |
1652 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1653 | status = nfserr_inval; |
1a308118 BF |
1654 | goto out; |
1655 | } | |
136e658d | 1656 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1657 | status = nfserr_perm; |
136e658d BF |
1658 | goto out; |
1659 | } | |
1660 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1661 | status = nfserr_not_same; |
1662 | goto out; | |
1663 | } | |
136e658d BF |
1664 | /* case 6 */ |
1665 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1666 | new = conf; | |
1667 | goto out_copy; | |
0733d213 | 1668 | } |
136e658d | 1669 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1670 | if (client_has_state(conf)) { |
1671 | status = nfserr_clid_inuse; | |
0733d213 AA |
1672 | goto out; |
1673 | } | |
1674 | expire_client(conf); | |
1675 | goto out_new; | |
1676 | } | |
136e658d | 1677 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1678 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1679 | new = conf; |
1680 | goto out_copy; | |
1681 | } | |
1682 | /* case 5, client reboot */ | |
136e658d | 1683 | goto out_new; |
6ddbbbfe MS |
1684 | } |
1685 | ||
2dbb269d | 1686 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1687 | status = nfserr_noent; |
1688 | goto out; | |
0733d213 AA |
1689 | } |
1690 | ||
ac55fdc4 | 1691 | unconf = find_unconfirmed_client_by_name(&exid->clname); |
2dbb269d | 1692 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1693 | expire_client(unconf); |
0733d213 | 1694 | |
2dbb269d | 1695 | /* case 1 (normal case) */ |
0733d213 | 1696 | out_new: |
2216d449 | 1697 | new = create_client(exid->clname, rqstp, &verf); |
0733d213 | 1698 | if (new == NULL) { |
4731030d | 1699 | status = nfserr_jukebox; |
0733d213 AA |
1700 | goto out; |
1701 | } | |
c116a0af | 1702 | new->cl_minorversion = 1; |
0733d213 | 1703 | |
0733d213 | 1704 | gen_clid(new); |
ac55fdc4 | 1705 | add_to_unconfirmed(new); |
0733d213 AA |
1706 | out_copy: |
1707 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1708 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1709 | ||
778df3f0 | 1710 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1711 | nfsd4_set_ex_flags(new, exid); |
1712 | ||
1713 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1714 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1715 | status = nfs_ok; |
1716 | ||
1717 | out: | |
1718 | nfs4_unlock_state(); | |
0733d213 | 1719 | return status; |
069b6ad4 AA |
1720 | } |
1721 | ||
57b7b43b | 1722 | static __be32 |
88e588d5 | 1723 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1724 | { |
88e588d5 AA |
1725 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1726 | slot_seqid); | |
b85d4c01 BH |
1727 | |
1728 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1729 | if (slot_inuse) { |
1730 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1731 | return nfserr_jukebox; |
1732 | else | |
1733 | return nfserr_seq_misordered; | |
1734 | } | |
f6d82485 | 1735 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1736 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1737 | return nfs_ok; |
88e588d5 | 1738 | if (seqid == slot_seqid) |
b85d4c01 | 1739 | return nfserr_replay_cache; |
b85d4c01 BH |
1740 | return nfserr_seq_misordered; |
1741 | } | |
1742 | ||
49557cc7 AA |
1743 | /* |
1744 | * Cache the create session result into the create session single DRC | |
1745 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1746 | * Do this for solo or embedded create session operations. | |
1747 | */ | |
1748 | static void | |
1749 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1750 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1751 | { |
1752 | slot->sl_status = nfserr; | |
1753 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1754 | } | |
1755 | ||
1756 | static __be32 | |
1757 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1758 | struct nfsd4_clid_slot *slot) | |
1759 | { | |
1760 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1761 | return slot->sl_status; | |
1762 | } | |
1763 | ||
1b74c25b MJ |
1764 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1765 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1766 | 1 + /* MIN tag is length with zero, only length */ \ | |
1767 | 3 + /* version, opcount, opcode */ \ | |
1768 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1769 | /* seqid, slotID, slotID, cache */ \ | |
1770 | 4 ) * sizeof(__be32)) | |
1771 | ||
1772 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1773 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1774 | 1 + /* status */ \ | |
1775 | 1 + /* MIN tag is length with zero, only length */ \ | |
1776 | 3 + /* opcount, opcode, opstatus*/ \ | |
1777 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1778 | /* seqid, slotID, slotID, slotID, status */ \ | |
1779 | 5 ) * sizeof(__be32)) | |
1780 | ||
57b7b43b | 1781 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1782 | { |
1783 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1784 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1785 | } | |
1786 | ||
069b6ad4 AA |
1787 | __be32 |
1788 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1789 | struct nfsd4_compound_state *cstate, | |
1790 | struct nfsd4_create_session *cr_ses) | |
1791 | { | |
363168b4 | 1792 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1793 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1794 | struct nfsd4_session *new; |
81f0b2a4 | 1795 | struct nfsd4_conn *conn; |
49557cc7 | 1796 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 1797 | __be32 status = 0; |
ec6b5d7b | 1798 | |
a62573dc MJ |
1799 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1800 | return nfserr_inval; | |
49730501 BF |
1801 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
1802 | return nfserr_toosmall; | |
81f0b2a4 BF |
1803 | new = alloc_session(&cr_ses->fore_channel); |
1804 | if (!new) | |
1805 | return nfserr_jukebox; | |
1806 | status = nfserr_jukebox; | |
1807 | conn = alloc_conn_from_crses(rqstp, cr_ses); | |
1808 | if (!conn) | |
1809 | goto out_free_session; | |
a62573dc | 1810 | |
ec6b5d7b | 1811 | nfs4_lock_state(); |
d15c077e BF |
1812 | unconf = find_unconfirmed_client(&cr_ses->clientid, true); |
1813 | conf = find_confirmed_client(&cr_ses->clientid, true); | |
ec6b5d7b AA |
1814 | |
1815 | if (conf) { | |
49557cc7 AA |
1816 | cs_slot = &conf->cl_cs_slot; |
1817 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1818 | if (status == nfserr_replay_cache) { |
49557cc7 | 1819 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
81f0b2a4 | 1820 | goto out_free_conn; |
49557cc7 | 1821 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1822 | status = nfserr_seq_misordered; |
81f0b2a4 | 1823 | goto out_free_conn; |
ec6b5d7b | 1824 | } |
ec6b5d7b | 1825 | } else if (unconf) { |
8f9d3d3b | 1826 | struct nfs4_client *old; |
ec6b5d7b | 1827 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 1828 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 1829 | status = nfserr_clid_inuse; |
81f0b2a4 | 1830 | goto out_free_conn; |
ec6b5d7b | 1831 | } |
49557cc7 AA |
1832 | cs_slot = &unconf->cl_cs_slot; |
1833 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1834 | if (status) { |
1835 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1836 | status = nfserr_seq_misordered; |
81f0b2a4 | 1837 | goto out_free_conn; |
ec6b5d7b | 1838 | } |
ac55fdc4 | 1839 | old = find_confirmed_client_by_name(&unconf->cl_name); |
8f9d3d3b BF |
1840 | if (old) |
1841 | expire_client(old); | |
1842 | move_to_confirmed(unconf); | |
ec6b5d7b AA |
1843 | conf = unconf; |
1844 | } else { | |
1845 | status = nfserr_stale_clientid; | |
81f0b2a4 | 1846 | goto out_free_conn; |
ec6b5d7b | 1847 | } |
81f0b2a4 | 1848 | status = nfs_ok; |
408b79bc BF |
1849 | /* |
1850 | * We do not support RDMA or persistent sessions | |
1851 | */ | |
1852 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1853 | cr_ses->flags &= ~SESSION4_RDMA; | |
1854 | ||
81f0b2a4 BF |
1855 | init_session(rqstp, new, conf, cr_ses); |
1856 | nfsd4_init_conn(rqstp, conn, new); | |
1857 | ||
ac7c46f2 | 1858 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 1859 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1860 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1861 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1862 | cs_slot->sl_seqid++; |
49557cc7 | 1863 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1864 | |
49557cc7 AA |
1865 | /* cache solo and embedded create sessions under the state lock */ |
1866 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1867 | out: |
1868 | nfs4_unlock_state(); | |
1869 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1870 | return status; | |
81f0b2a4 BF |
1871 | out_free_conn: |
1872 | free_conn(conn); | |
1873 | out_free_session: | |
1874 | __free_session(new); | |
1875 | goto out; | |
069b6ad4 AA |
1876 | } |
1877 | ||
57716355 BF |
1878 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1879 | { | |
1880 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1881 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1882 | ||
1883 | return argp->opcnt == resp->opcnt; | |
1884 | } | |
1885 | ||
1d1bc8f2 BF |
1886 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1887 | { | |
1888 | switch (*dir) { | |
1889 | case NFS4_CDFC4_FORE: | |
1890 | case NFS4_CDFC4_BACK: | |
1891 | return nfs_ok; | |
1892 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1893 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1894 | *dir = NFS4_CDFC4_BOTH; | |
1895 | return nfs_ok; | |
1896 | }; | |
1897 | return nfserr_inval; | |
1898 | } | |
1899 | ||
cb73a9f4 BF |
1900 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
1901 | { | |
1902 | struct nfsd4_session *session = cstate->session; | |
1903 | ||
1904 | spin_lock(&client_lock); | |
1905 | session->se_cb_prog = bc->bc_cb_program; | |
1906 | session->se_cb_sec = bc->bc_cb_sec; | |
1907 | spin_unlock(&client_lock); | |
1908 | ||
1909 | nfsd4_probe_callback(session->se_client); | |
1910 | ||
1911 | return nfs_ok; | |
1912 | } | |
1913 | ||
1d1bc8f2 BF |
1914 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
1915 | struct nfsd4_compound_state *cstate, | |
1916 | struct nfsd4_bind_conn_to_session *bcts) | |
1917 | { | |
1918 | __be32 status; | |
3ba63671 | 1919 | struct nfsd4_conn *conn; |
1d1bc8f2 BF |
1920 | |
1921 | if (!nfsd4_last_compound_op(rqstp)) | |
1922 | return nfserr_not_only_op; | |
1923 | spin_lock(&client_lock); | |
1924 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1925 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1926 | * client_lock iself: */ | |
1927 | if (cstate->session) { | |
1928 | nfsd4_get_session(cstate->session); | |
1929 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1930 | } | |
1931 | spin_unlock(&client_lock); | |
1932 | if (!cstate->session) | |
1933 | return nfserr_badsession; | |
1934 | ||
1935 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
3ba63671 BF |
1936 | if (status) |
1937 | return status; | |
1938 | conn = alloc_conn(rqstp, bcts->dir); | |
1939 | if (!conn) | |
1940 | return nfserr_jukebox; | |
e1ff371f | 1941 | nfsd4_init_conn(rqstp, conn, cstate->session); |
3ba63671 | 1942 | return nfs_ok; |
1d1bc8f2 BF |
1943 | } |
1944 | ||
5d4cec2f BF |
1945 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1946 | { | |
1947 | if (!session) | |
1948 | return 0; | |
1949 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1950 | } | |
1951 | ||
069b6ad4 AA |
1952 | __be32 |
1953 | nfsd4_destroy_session(struct svc_rqst *r, | |
1954 | struct nfsd4_compound_state *cstate, | |
1955 | struct nfsd4_destroy_session *sessionid) | |
1956 | { | |
e10e0cfc | 1957 | struct nfsd4_session *ses; |
57b7b43b | 1958 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1959 | |
1960 | /* Notes: | |
1961 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1962 | * - Should we return nfserr_back_chan_busy if waiting for | |
1963 | * callbacks on to-be-destroyed session? | |
1964 | * - Do we need to clear any callback info from previous session? | |
1965 | */ | |
1966 | ||
5d4cec2f | 1967 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1968 | if (!nfsd4_last_compound_op(r)) |
1969 | return nfserr_not_only_op; | |
1970 | } | |
e10e0cfc | 1971 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1972 | spin_lock(&client_lock); |
e10e0cfc BH |
1973 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1974 | if (!ses) { | |
9089f1b4 | 1975 | spin_unlock(&client_lock); |
e10e0cfc BH |
1976 | goto out; |
1977 | } | |
1978 | ||
1979 | unhash_session(ses); | |
9089f1b4 | 1980 | spin_unlock(&client_lock); |
e10e0cfc | 1981 | |
ab707e15 | 1982 | nfs4_lock_state(); |
84f5f7cc | 1983 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1984 | nfs4_unlock_state(); |
19cf5c02 | 1985 | |
508dc6e1 | 1986 | spin_lock(&client_lock); |
19cf5c02 | 1987 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1988 | nfsd4_put_session_locked(ses); |
1989 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1990 | status = nfs_ok; |
1991 | out: | |
1992 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1993 | return status; | |
069b6ad4 AA |
1994 | } |
1995 | ||
a663bdd8 | 1996 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1997 | { |
1998 | struct nfsd4_conn *c; | |
1999 | ||
2000 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 2001 | if (c->cn_xprt == xpt) { |
328ead28 BF |
2002 | return c; |
2003 | } | |
2004 | } | |
2005 | return NULL; | |
2006 | } | |
2007 | ||
a663bdd8 | 2008 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
2009 | { |
2010 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 2011 | struct nfsd4_conn *c; |
21b75b01 | 2012 | int ret; |
328ead28 BF |
2013 | |
2014 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 2015 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
2016 | if (c) { |
2017 | spin_unlock(&clp->cl_lock); | |
2018 | free_conn(new); | |
2019 | return; | |
2020 | } | |
2021 | __nfsd4_hash_conn(new, ses); | |
2022 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
2023 | ret = nfsd4_register_conn(new); |
2024 | if (ret) | |
2025 | /* oops; xprt is already down: */ | |
2026 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
2027 | return; |
2028 | } | |
2029 | ||
868b89c3 MJ |
2030 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
2031 | { | |
2032 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
2033 | ||
2034 | return args->opcnt > session->se_fchannel.maxops; | |
2035 | } | |
2036 | ||
ae82a8d0 MJ |
2037 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
2038 | struct nfsd4_session *session) | |
2039 | { | |
2040 | struct xdr_buf *xb = &rqstp->rq_arg; | |
2041 | ||
2042 | return xb->len > session->se_fchannel.maxreq_sz; | |
2043 | } | |
2044 | ||
069b6ad4 | 2045 | __be32 |
b85d4c01 | 2046 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
2047 | struct nfsd4_compound_state *cstate, |
2048 | struct nfsd4_sequence *seq) | |
2049 | { | |
f9bb94c4 | 2050 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
2051 | struct nfsd4_session *session; |
2052 | struct nfsd4_slot *slot; | |
a663bdd8 | 2053 | struct nfsd4_conn *conn; |
57b7b43b | 2054 | __be32 status; |
b85d4c01 | 2055 | |
f9bb94c4 AA |
2056 | if (resp->opcnt != 1) |
2057 | return nfserr_sequence_pos; | |
2058 | ||
a663bdd8 BF |
2059 | /* |
2060 | * Will be either used or freed by nfsd4_sequence_check_conn | |
2061 | * below. | |
2062 | */ | |
2063 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
2064 | if (!conn) | |
2065 | return nfserr_jukebox; | |
2066 | ||
9089f1b4 | 2067 | spin_lock(&client_lock); |
b85d4c01 BH |
2068 | status = nfserr_badsession; |
2069 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
2070 | if (!session) | |
2071 | goto out; | |
2072 | ||
868b89c3 MJ |
2073 | status = nfserr_too_many_ops; |
2074 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2075 | goto out; | |
2076 | ||
ae82a8d0 MJ |
2077 | status = nfserr_req_too_big; |
2078 | if (nfsd4_request_too_big(rqstp, session)) | |
2079 | goto out; | |
2080 | ||
b85d4c01 | 2081 | status = nfserr_badslot; |
6c18ba9f | 2082 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2083 | goto out; |
2084 | ||
557ce264 | 2085 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2086 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2087 | ||
a8dfdaeb AA |
2088 | /* We do not negotiate the number of slots yet, so set the |
2089 | * maxslots to the session maxreqs which is used to encode | |
2090 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2091 | seq->maxslots = session->se_fchannel.maxreqs; | |
2092 | ||
73e79482 BF |
2093 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2094 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2095 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2096 | status = nfserr_seq_misordered; |
2097 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2098 | goto out; | |
b85d4c01 BH |
2099 | cstate->slot = slot; |
2100 | cstate->session = session; | |
da3846a2 | 2101 | /* Return the cached reply status and set cstate->status |
557ce264 | 2102 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2103 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2104 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2105 | goto out; |
b85d4c01 BH |
2106 | } |
2107 | if (status) | |
2108 | goto out; | |
2109 | ||
a663bdd8 BF |
2110 | nfsd4_sequence_check_conn(conn, session); |
2111 | conn = NULL; | |
328ead28 | 2112 | |
b85d4c01 | 2113 | /* Success! bump slot seqid */ |
b85d4c01 | 2114 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2115 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2116 | if (seq->cachethis) |
2117 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2118 | else |
2119 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2120 | |
2121 | cstate->slot = slot; | |
2122 | cstate->session = session; | |
2123 | ||
b85d4c01 | 2124 | out: |
26c0c75e | 2125 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2126 | if (cstate->session) { |
0d7bb719 BF |
2127 | struct nfs4_client *clp = session->se_client; |
2128 | ||
36acb66b | 2129 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2130 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2131 | switch (clp->cl_cb_state) { |
2132 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2133 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2134 | break; |
2135 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2136 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2137 | break; |
fc0c3dd1 BH |
2138 | default: |
2139 | seq->status_flags = 0; | |
5423732a | 2140 | } |
aaf84eb9 | 2141 | } |
a663bdd8 | 2142 | kfree(conn); |
36acb66b | 2143 | spin_unlock(&client_lock); |
b85d4c01 BH |
2144 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2145 | return status; | |
069b6ad4 AA |
2146 | } |
2147 | ||
345c2842 MJ |
2148 | __be32 |
2149 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2150 | { | |
2151 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2152 | __be32 status = 0; |
345c2842 MJ |
2153 | |
2154 | nfs4_lock_state(); | |
d15c077e BF |
2155 | unconf = find_unconfirmed_client(&dc->clientid, true); |
2156 | conf = find_confirmed_client(&dc->clientid, true); | |
345c2842 MJ |
2157 | |
2158 | if (conf) { | |
2159 | clp = conf; | |
2160 | ||
6eccece9 | 2161 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2162 | status = nfserr_clientid_busy; |
2163 | goto out; | |
2164 | } | |
2165 | ||
2166 | /* rfc5661 18.50.3 */ | |
2167 | if (cstate->session && conf == cstate->session->se_client) { | |
2168 | status = nfserr_clientid_busy; | |
2169 | goto out; | |
2170 | } | |
2171 | } else if (unconf) | |
2172 | clp = unconf; | |
2173 | else { | |
2174 | status = nfserr_stale_clientid; | |
2175 | goto out; | |
2176 | } | |
2177 | ||
2178 | expire_client(clp); | |
2179 | out: | |
2180 | nfs4_unlock_state(); | |
2181 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2182 | return status; | |
2183 | } | |
2184 | ||
4dc6ec00 BF |
2185 | __be32 |
2186 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2187 | { | |
57b7b43b | 2188 | __be32 status = 0; |
bcecf1cc | 2189 | |
4dc6ec00 BF |
2190 | if (rc->rca_one_fs) { |
2191 | if (!cstate->current_fh.fh_dentry) | |
2192 | return nfserr_nofilehandle; | |
2193 | /* | |
2194 | * We don't take advantage of the rca_one_fs case. | |
2195 | * That's OK, it's optional, we can safely ignore it. | |
2196 | */ | |
2197 | return nfs_ok; | |
2198 | } | |
bcecf1cc | 2199 | |
4dc6ec00 | 2200 | nfs4_lock_state(); |
bcecf1cc | 2201 | status = nfserr_complete_already; |
a52d726b JL |
2202 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2203 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2204 | goto out; |
2205 | ||
2206 | status = nfserr_stale_clientid; | |
2207 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2208 | /* |
2209 | * The following error isn't really legal. | |
2210 | * But we only get here if the client just explicitly | |
2211 | * destroyed the client. Surely it no longer cares what | |
2212 | * error it gets back on an operation for the dead | |
2213 | * client. | |
2214 | */ | |
bcecf1cc MJ |
2215 | goto out; |
2216 | ||
2217 | status = nfs_ok; | |
2a4317c5 | 2218 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2219 | out: |
4dc6ec00 | 2220 | nfs4_unlock_state(); |
bcecf1cc | 2221 | return status; |
4dc6ec00 BF |
2222 | } |
2223 | ||
b37ad28b | 2224 | __be32 |
b591480b BF |
2225 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2226 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2227 | { |
a084daf5 | 2228 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 2229 | nfs4_verifier clverifier = setclid->se_verf; |
28ce6054 | 2230 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2231 | __be32 status; |
1da177e4 | 2232 | |
63db4632 | 2233 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2234 | nfs4_lock_state(); |
ac55fdc4 | 2235 | conf = find_confirmed_client_by_name(&clname); |
28ce6054 | 2236 | if (conf) { |
63db4632 | 2237 | /* case 0: */ |
1da177e4 | 2238 | status = nfserr_clid_inuse; |
e203d506 BF |
2239 | if (clp_used_exchangeid(conf)) |
2240 | goto out; | |
026722c2 | 2241 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2242 | char addr_str[INET6_ADDRSTRLEN]; |
2243 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2244 | sizeof(addr_str)); | |
2245 | dprintk("NFSD: setclientid: string in use by client " | |
2246 | "at %s\n", addr_str); | |
1da177e4 LT |
2247 | goto out; |
2248 | } | |
1da177e4 | 2249 | } |
ac55fdc4 | 2250 | unconf = find_unconfirmed_client_by_name(&clname); |
8f930711 BF |
2251 | if (unconf) |
2252 | expire_client(unconf); | |
3e772463 | 2253 | status = nfserr_jukebox; |
2216d449 | 2254 | new = create_client(clname, rqstp, &clverifier); |
8f930711 BF |
2255 | if (new == NULL) |
2256 | goto out; | |
34b232bb | 2257 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2258 | /* case 1: probable callback update */ |
1da177e4 | 2259 | copy_clid(new, conf); |
34b232bb | 2260 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
1da177e4 | 2261 | gen_clid(new); |
8323c3b2 | 2262 | new->cl_minorversion = 0; |
6f3d772f | 2263 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 2264 | add_to_unconfirmed(new); |
1da177e4 LT |
2265 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2266 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2267 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2268 | status = nfs_ok; | |
2269 | out: | |
2270 | nfs4_unlock_state(); | |
2271 | return status; | |
2272 | } | |
2273 | ||
2274 | ||
b37ad28b | 2275 | __be32 |
b591480b BF |
2276 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2277 | struct nfsd4_compound_state *cstate, | |
2278 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2279 | { |
21ab45a4 | 2280 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2281 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2282 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2283 | __be32 status; |
7f2210fa | 2284 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 2285 | |
2c142baa | 2286 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 2287 | return nfserr_stale_clientid; |
1da177e4 | 2288 | nfs4_lock_state(); |
21ab45a4 | 2289 | |
d15c077e BF |
2290 | conf = find_confirmed_client(clid, false); |
2291 | unconf = find_unconfirmed_client(clid, false); | |
a186e767 | 2292 | /* |
8695b90a BF |
2293 | * We try hard to give out unique clientid's, so if we get an |
2294 | * attempt to confirm the same clientid with a different cred, | |
2295 | * there's a bug somewhere. Let's charitably assume it's our | |
2296 | * bug. | |
a186e767 | 2297 | */ |
8695b90a BF |
2298 | status = nfserr_serverfault; |
2299 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2300 | goto out; | |
2301 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2302 | goto out; | |
63db4632 | 2303 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2304 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2305 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2306 | status = nfs_ok; |
90d700b7 BF |
2307 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2308 | status = nfserr_stale_clientid; | |
2309 | goto out; | |
2310 | } | |
2311 | status = nfs_ok; | |
2312 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2313 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2314 | nfsd4_probe_callback(conf); | |
2315 | expire_client(unconf); | |
90d700b7 | 2316 | } else { /* case 3: normal case; new or rebooted client */ |
ac55fdc4 | 2317 | conf = find_confirmed_client_by_name(&unconf->cl_name); |
0d22f68f | 2318 | if (conf) |
8695b90a | 2319 | expire_client(conf); |
8695b90a | 2320 | move_to_confirmed(unconf); |
f3d03b92 | 2321 | nfsd4_probe_callback(unconf); |
08e8987c | 2322 | } |
1da177e4 | 2323 | out: |
1da177e4 LT |
2324 | nfs4_unlock_state(); |
2325 | return status; | |
2326 | } | |
2327 | ||
32513b40 BF |
2328 | static struct nfs4_file *nfsd4_alloc_file(void) |
2329 | { | |
2330 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2331 | } | |
2332 | ||
1da177e4 | 2333 | /* OPEN Share state helper functions */ |
32513b40 | 2334 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2335 | { |
1da177e4 LT |
2336 | unsigned int hashval = file_hashval(ino); |
2337 | ||
32513b40 BF |
2338 | atomic_set(&fp->fi_ref, 1); |
2339 | INIT_LIST_HEAD(&fp->fi_hash); | |
2340 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2341 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2342 | fp->fi_inode = igrab(ino); | |
2343 | fp->fi_had_conflict = false; | |
2344 | fp->fi_lease = NULL; | |
2345 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2346 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2347 | spin_lock(&recall_lock); | |
2348 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2349 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2350 | } |
2351 | ||
e60d4398 | 2352 | static void |
e18b890b | 2353 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2354 | { |
e60d4398 N |
2355 | if (*slab == NULL) |
2356 | return; | |
1a1d92c1 | 2357 | kmem_cache_destroy(*slab); |
e60d4398 | 2358 | *slab = NULL; |
1da177e4 LT |
2359 | } |
2360 | ||
e8ff2a84 | 2361 | void |
1da177e4 LT |
2362 | nfsd4_free_slabs(void) |
2363 | { | |
fe0750e5 BF |
2364 | nfsd4_free_slab(&openowner_slab); |
2365 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2366 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2367 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2368 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2369 | } |
1da177e4 | 2370 | |
72083396 | 2371 | int |
e60d4398 N |
2372 | nfsd4_init_slabs(void) |
2373 | { | |
fe0750e5 BF |
2374 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2375 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2376 | if (openowner_slab == NULL) | |
2377 | goto out_nomem; | |
2378 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
3c40794b | 2379 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 2380 | if (lockowner_slab == NULL) |
e60d4398 N |
2381 | goto out_nomem; |
2382 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2383 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2384 | if (file_slab == NULL) |
2385 | goto out_nomem; | |
5ac049ac | 2386 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2387 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2388 | if (stateid_slab == NULL) |
2389 | goto out_nomem; | |
5b2d21c1 | 2390 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2391 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2392 | if (deleg_slab == NULL) |
2393 | goto out_nomem; | |
e60d4398 N |
2394 | return 0; |
2395 | out_nomem: | |
2396 | nfsd4_free_slabs(); | |
2397 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2398 | return -ENOMEM; | |
1da177e4 LT |
2399 | } |
2400 | ||
fe0750e5 BF |
2401 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2402 | { | |
2403 | kfree(oo->oo_owner.so_owner.data); | |
2404 | kmem_cache_free(openowner_slab, oo); | |
2405 | } | |
2406 | ||
2407 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2408 | { |
fe0750e5 BF |
2409 | kfree(lo->lo_owner.so_owner.data); |
2410 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2411 | } |
2412 | ||
ff194bd9 | 2413 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2414 | { |
ff194bd9 BF |
2415 | rp->rp_status = nfserr_serverfault; |
2416 | rp->rp_buflen = 0; | |
2417 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2418 | } |
2419 | ||
fe0750e5 | 2420 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2421 | { |
1da177e4 | 2422 | struct nfs4_stateowner *sop; |
1da177e4 | 2423 | |
fe0750e5 | 2424 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2425 | if (!sop) |
2426 | return NULL; | |
2427 | ||
2428 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2429 | if (!sop->so_owner.data) { | |
fe0750e5 | 2430 | kmem_cache_free(slab, sop); |
1da177e4 | 2431 | return NULL; |
ff194bd9 BF |
2432 | } |
2433 | sop->so_owner.len = owner->len; | |
2434 | ||
ea1da636 | 2435 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2436 | sop->so_client = clp; |
2437 | init_nfs4_replay(&sop->so_replay); | |
2438 | return sop; | |
2439 | } | |
2440 | ||
fe0750e5 | 2441 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2442 | { |
16bfdaaf | 2443 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2444 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2445 | } |
2446 | ||
fe0750e5 | 2447 | static struct nfs4_openowner * |
ff194bd9 | 2448 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2449 | struct nfs4_openowner *oo; |
ff194bd9 | 2450 | |
fe0750e5 BF |
2451 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2452 | if (!oo) | |
ff194bd9 | 2453 | return NULL; |
fe0750e5 BF |
2454 | oo->oo_owner.so_is_open_owner = 1; |
2455 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2456 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2457 | oo->oo_time = 0; |
38c387b5 | 2458 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2459 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2460 | hash_openowner(oo, clp, strhashval); | |
2461 | return oo; | |
1da177e4 LT |
2462 | } |
2463 | ||
996e0938 | 2464 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2465 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2466 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2467 | |
996e0938 | 2468 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2469 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2470 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2471 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2472 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2473 | get_nfs4_file(fp); |
1da177e4 | 2474 | stp->st_file = fp; |
1da177e4 LT |
2475 | stp->st_access_bmap = 0; |
2476 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2477 | set_access(open->op_share_access, stp); |
ce0fc43c | 2478 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2479 | stp->st_openstp = NULL; |
1da177e4 LT |
2480 | } |
2481 | ||
fd39ca9a | 2482 | static void |
fe0750e5 | 2483 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2484 | { |
fe0750e5 | 2485 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2486 | |
fe0750e5 BF |
2487 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2488 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2489 | } |
2490 | ||
1da177e4 | 2491 | static int |
599e0a22 BF |
2492 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2493 | clientid_t *clid) | |
2494 | { | |
2495 | return (sop->so_owner.len == owner->len) && | |
2496 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2497 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2498 | } |
2499 | ||
fe0750e5 | 2500 | static struct nfs4_openowner * |
d15c077e | 2501 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) |
1da177e4 | 2502 | { |
a50d2ad1 BF |
2503 | struct nfs4_stateowner *so; |
2504 | struct nfs4_openowner *oo; | |
d15c077e | 2505 | struct nfs4_client *clp; |
1da177e4 | 2506 | |
16bfdaaf BF |
2507 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2508 | if (!so->so_is_open_owner) | |
2509 | continue; | |
a50d2ad1 BF |
2510 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2511 | oo = openowner(so); | |
d15c077e BF |
2512 | clp = oo->oo_owner.so_client; |
2513 | if ((bool)clp->cl_minorversion != sessions) | |
2514 | return NULL; | |
a50d2ad1 BF |
2515 | renew_client(oo->oo_owner.so_client); |
2516 | return oo; | |
2517 | } | |
1da177e4 LT |
2518 | } |
2519 | return NULL; | |
2520 | } | |
2521 | ||
2522 | /* search file_hashtbl[] for file */ | |
2523 | static struct nfs4_file * | |
2524 | find_file(struct inode *ino) | |
2525 | { | |
2526 | unsigned int hashval = file_hashval(ino); | |
2527 | struct nfs4_file *fp; | |
2528 | ||
8b671b80 | 2529 | spin_lock(&recall_lock); |
1da177e4 | 2530 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2531 | if (fp->fi_inode == ino) { |
2532 | get_nfs4_file(fp); | |
8b671b80 | 2533 | spin_unlock(&recall_lock); |
1da177e4 | 2534 | return fp; |
13cd2184 | 2535 | } |
1da177e4 | 2536 | } |
8b671b80 | 2537 | spin_unlock(&recall_lock); |
1da177e4 LT |
2538 | return NULL; |
2539 | } | |
2540 | ||
1da177e4 LT |
2541 | /* |
2542 | * Called to check deny when READ with all zero stateid or | |
2543 | * WRITE with all zero or all one stateid | |
2544 | */ | |
b37ad28b | 2545 | static __be32 |
1da177e4 LT |
2546 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2547 | { | |
2548 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2549 | struct nfs4_file *fp; | |
dcef0413 | 2550 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2551 | __be32 ret; |
1da177e4 LT |
2552 | |
2553 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2554 | ||
2555 | fp = find_file(ino); | |
13cd2184 N |
2556 | if (!fp) |
2557 | return nfs_ok; | |
b700949b | 2558 | ret = nfserr_locked; |
1da177e4 | 2559 | /* Search for conflicting share reservations */ |
13cd2184 | 2560 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2561 | if (test_deny(deny_type, stp) || |
2562 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2563 | goto out; |
1da177e4 | 2564 | } |
13cd2184 N |
2565 | ret = nfs_ok; |
2566 | out: | |
2567 | put_nfs4_file(fp); | |
2568 | return ret; | |
1da177e4 LT |
2569 | } |
2570 | ||
6b57d9c8 | 2571 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2572 | { |
1da177e4 LT |
2573 | /* We're assuming the state code never drops its reference |
2574 | * without first removing the lease. Since we're in this lease | |
2575 | * callback (and since the lease code is serialized by the kernel | |
2576 | * lock) we know the server hasn't removed the lease yet, we know | |
2577 | * it's safe to take a reference: */ | |
2578 | atomic_inc(&dp->dl_count); | |
2579 | ||
1da177e4 | 2580 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2581 | |
460781b5 | 2582 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2583 | dp->dl_time = get_seconds(); |
2584 | ||
6b57d9c8 BF |
2585 | nfsd4_cb_recall(dp); |
2586 | } | |
2587 | ||
acfdf5c3 | 2588 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2589 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2590 | { | |
acfdf5c3 BF |
2591 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2592 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2593 | |
7fa10cd1 BF |
2594 | if (!fp) { |
2595 | WARN(1, "(%p)->fl_owner NULL\n", fl); | |
2596 | return; | |
2597 | } | |
2598 | if (fp->fi_had_conflict) { | |
2599 | WARN(1, "duplicate break on %p\n", fp); | |
2600 | return; | |
2601 | } | |
0272e1fd BF |
2602 | /* |
2603 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2604 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2605 | * in time: |
0272e1fd BF |
2606 | */ |
2607 | fl->fl_break_time = 0; | |
1da177e4 | 2608 | |
5d926e8c | 2609 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2610 | fp->fi_had_conflict = true; |
2611 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2612 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2613 | spin_unlock(&recall_lock); |
1da177e4 LT |
2614 | } |
2615 | ||
1da177e4 LT |
2616 | static |
2617 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2618 | { | |
2619 | if (arg & F_UNLCK) | |
2620 | return lease_modify(onlist, arg); | |
2621 | else | |
2622 | return -EAGAIN; | |
2623 | } | |
2624 | ||
7b021967 | 2625 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2626 | .lm_break = nfsd_break_deleg_cb, |
2627 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2628 | }; |
2629 | ||
7a8711c9 BF |
2630 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2631 | { | |
2632 | if (nfsd4_has_session(cstate)) | |
2633 | return nfs_ok; | |
2634 | if (seqid == so->so_seqid - 1) | |
2635 | return nfserr_replay_me; | |
2636 | if (seqid == so->so_seqid) | |
2637 | return nfs_ok; | |
2638 | return nfserr_bad_seqid; | |
2639 | } | |
1da177e4 | 2640 | |
b37ad28b | 2641 | __be32 |
6668958f AA |
2642 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2643 | struct nfsd4_open *open) | |
1da177e4 | 2644 | { |
1da177e4 LT |
2645 | clientid_t *clientid = &open->op_clientid; |
2646 | struct nfs4_client *clp = NULL; | |
2647 | unsigned int strhashval; | |
fe0750e5 | 2648 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2649 | __be32 status; |
2c142baa | 2650 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
1da177e4 | 2651 | |
2c142baa | 2652 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 2653 | return nfserr_stale_clientid; |
32513b40 BF |
2654 | /* |
2655 | * In case we need it later, after we've already created the | |
2656 | * file and don't want to risk a further failure: | |
2657 | */ | |
2658 | open->op_file = nfsd4_alloc_file(); | |
2659 | if (open->op_file == NULL) | |
2660 | return nfserr_jukebox; | |
1da177e4 | 2661 | |
16bfdaaf | 2662 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
d15c077e | 2663 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion); |
fe0750e5 BF |
2664 | open->op_openowner = oo; |
2665 | if (!oo) { | |
d15c077e | 2666 | clp = find_confirmed_client(clientid, cstate->minorversion); |
1da177e4 | 2667 | if (clp == NULL) |
0f442aa2 | 2668 | return nfserr_expired; |
bcf130f9 | 2669 | goto new_owner; |
1da177e4 | 2670 | } |
dad1c067 | 2671 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2672 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2673 | clp = oo->oo_owner.so_client; |
2674 | release_openowner(oo); | |
2675 | open->op_openowner = NULL; | |
bcf130f9 | 2676 | goto new_owner; |
0f442aa2 | 2677 | } |
4cdc951b BF |
2678 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2679 | if (status) | |
2680 | return status; | |
2681 | clp = oo->oo_owner.so_client; | |
2682 | goto alloc_stateid; | |
bcf130f9 BF |
2683 | new_owner: |
2684 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2685 | if (oo == NULL) | |
2686 | return nfserr_jukebox; | |
2687 | open->op_openowner = oo; | |
4cdc951b BF |
2688 | alloc_stateid: |
2689 | open->op_stp = nfs4_alloc_stateid(clp); | |
2690 | if (!open->op_stp) | |
2691 | return nfserr_jukebox; | |
0f442aa2 | 2692 | return nfs_ok; |
1da177e4 LT |
2693 | } |
2694 | ||
b37ad28b | 2695 | static inline __be32 |
4a6e43e6 N |
2696 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2697 | { | |
2698 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2699 | return nfserr_openmode; | |
2700 | else | |
2701 | return nfs_ok; | |
2702 | } | |
2703 | ||
f459e453 | 2704 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2705 | { |
f459e453 | 2706 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2707 | } |
2708 | ||
38c2f4b1 | 2709 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2710 | { |
f459e453 | 2711 | struct nfs4_stid *ret; |
24a0111e | 2712 | |
38c2f4b1 | 2713 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2714 | if (!ret) |
2715 | return NULL; | |
2716 | return delegstateid(ret); | |
24a0111e BF |
2717 | } |
2718 | ||
8b289b2c BF |
2719 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2720 | { | |
2721 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2722 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2723 | } | |
2724 | ||
b37ad28b | 2725 | static __be32 |
38c2f4b1 | 2726 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2727 | struct nfs4_delegation **dp) |
2728 | { | |
2729 | int flags; | |
b37ad28b | 2730 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2731 | |
38c2f4b1 | 2732 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2733 | if (*dp == NULL) |
c44c5eeb | 2734 | goto out; |
24a0111e | 2735 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2736 | status = nfs4_check_delegmode(*dp, flags); |
2737 | if (status) | |
2738 | *dp = NULL; | |
c44c5eeb | 2739 | out: |
8b289b2c | 2740 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2741 | return nfs_ok; |
2742 | if (status) | |
2743 | return status; | |
dad1c067 | 2744 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2745 | return nfs_ok; |
567d9829 N |
2746 | } |
2747 | ||
b37ad28b | 2748 | static __be32 |
dcef0413 | 2749 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2750 | { |
dcef0413 | 2751 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2752 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2753 | |
8beefa24 | 2754 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2755 | /* ignore lock owners */ |
2756 | if (local->st_stateowner->so_is_open_owner == 0) | |
2757 | continue; | |
2758 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2759 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2760 | *stpp = local; |
2761 | /* check for conflicting share reservations */ | |
2762 | if (!test_share(local, open)) | |
77eaae8d | 2763 | return nfserr_share_denied; |
1da177e4 | 2764 | } |
77eaae8d | 2765 | return nfs_ok; |
1da177e4 LT |
2766 | } |
2767 | ||
21fb4016 BF |
2768 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2769 | { | |
2770 | int flags = 0; | |
2771 | ||
2772 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2773 | flags |= NFSD_MAY_READ; | |
2774 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2775 | flags |= NFSD_MAY_WRITE; | |
2776 | return flags; | |
2777 | } | |
2778 | ||
0c12eaff CB |
2779 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2780 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2781 | { |
2782 | __be32 status; | |
0c12eaff CB |
2783 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2784 | int access = nfs4_access_to_access(open->op_share_access); | |
2785 | ||
f9d7562f BF |
2786 | if (!fp->fi_fds[oflag]) { |
2787 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2788 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2789 | if (status) |
2790 | return status; | |
2791 | } | |
2792 | nfs4_file_get_access(fp, oflag); | |
2793 | ||
2794 | return nfs_ok; | |
2795 | } | |
2796 | ||
b37ad28b | 2797 | static inline __be32 |
1da177e4 LT |
2798 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2799 | struct nfsd4_open *open) | |
2800 | { | |
2801 | struct iattr iattr = { | |
2802 | .ia_valid = ATTR_SIZE, | |
2803 | .ia_size = 0, | |
2804 | }; | |
2805 | if (!open->op_truncate) | |
2806 | return 0; | |
2807 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2808 | return nfserr_inval; |
1da177e4 LT |
2809 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2810 | } | |
2811 | ||
b37ad28b | 2812 | static __be32 |
dcef0413 | 2813 | 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 | 2814 | { |
b6d2f1ca | 2815 | u32 op_share_access = open->op_share_access; |
7d947842 | 2816 | bool new_access; |
b37ad28b | 2817 | __be32 status; |
1da177e4 | 2818 | |
82c5ff1b | 2819 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2820 | if (new_access) { |
0c12eaff | 2821 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2822 | if (status) |
2823 | return status; | |
6c26d08f | 2824 | } |
1da177e4 LT |
2825 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2826 | if (status) { | |
f9d7562f | 2827 | if (new_access) { |
f197c271 | 2828 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2829 | nfs4_file_put_access(fp, oflag); |
2830 | } | |
1da177e4 LT |
2831 | return status; |
2832 | } | |
2833 | /* remember the open */ | |
82c5ff1b | 2834 | set_access(op_share_access, stp); |
ce0fc43c | 2835 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2836 | |
2837 | return nfs_ok; | |
2838 | } | |
2839 | ||
2840 | ||
1da177e4 | 2841 | static void |
1255a8f3 | 2842 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2843 | { |
dad1c067 | 2844 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2845 | } |
2846 | ||
14a24e99 BF |
2847 | /* Should we give out recallable state?: */ |
2848 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2849 | { | |
2850 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2851 | return true; | |
2852 | /* | |
2853 | * In the sessions case, since we don't have to establish a | |
2854 | * separate connection for callbacks, we assume it's OK | |
2855 | * until we hear otherwise: | |
2856 | */ | |
2857 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2858 | } | |
2859 | ||
22d38c4c BF |
2860 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2861 | { | |
2862 | struct file_lock *fl; | |
2863 | ||
2864 | fl = locks_alloc_lock(); | |
2865 | if (!fl) | |
2866 | return NULL; | |
2867 | locks_init_lock(fl); | |
2868 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2869 | fl->fl_flags = FL_LEASE; | |
2870 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2871 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2872 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2873 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2874 | return fl; |
2875 | } | |
2876 | ||
edab9782 BF |
2877 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2878 | { | |
acfdf5c3 | 2879 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2880 | struct file_lock *fl; |
2881 | int status; | |
2882 | ||
2883 | fl = nfs4_alloc_init_lease(dp, flag); | |
2884 | if (!fl) | |
2885 | return -ENOMEM; | |
acfdf5c3 | 2886 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2887 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2888 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2889 | if (status) { |
acfdf5c3 | 2890 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2891 | locks_free_lock(fl); |
2892 | return -ENOMEM; | |
2893 | } | |
acfdf5c3 | 2894 | fp->fi_lease = fl; |
cb0942b8 | 2895 | fp->fi_deleg_file = get_file(fl->fl_file); |
acfdf5c3 BF |
2896 | atomic_set(&fp->fi_delegees, 1); |
2897 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2898 | return 0; | |
2899 | } | |
2900 | ||
2901 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2902 | { | |
2903 | struct nfs4_file *fp = dp->dl_file; | |
2904 | ||
2905 | if (!fp->fi_lease) | |
2906 | return nfs4_setlease(dp, flag); | |
2907 | spin_lock(&recall_lock); | |
2908 | if (fp->fi_had_conflict) { | |
2909 | spin_unlock(&recall_lock); | |
2910 | return -EAGAIN; | |
2911 | } | |
2912 | atomic_inc(&fp->fi_delegees); | |
2913 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2914 | spin_unlock(&recall_lock); | |
2a74aba7 | 2915 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2916 | return 0; |
2917 | } | |
2918 | ||
4aa8913c BH |
2919 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2920 | { | |
2921 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2922 | if (status == -EAGAIN) | |
2923 | open->op_why_no_deleg = WND4_CONTENTION; | |
2924 | else { | |
2925 | open->op_why_no_deleg = WND4_RESOURCE; | |
2926 | switch (open->op_deleg_want) { | |
2927 | case NFS4_SHARE_WANT_READ_DELEG: | |
2928 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2929 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2930 | break; | |
2931 | case NFS4_SHARE_WANT_CANCEL: | |
2932 | open->op_why_no_deleg = WND4_CANCELLED; | |
2933 | break; | |
2934 | case NFS4_SHARE_WANT_NO_DELEG: | |
2935 | BUG(); /* not supposed to get here */ | |
2936 | } | |
2937 | } | |
2938 | } | |
2939 | ||
1da177e4 LT |
2940 | /* |
2941 | * Attempt to hand out a delegation. | |
2942 | */ | |
2943 | static void | |
5ccb0066 SK |
2944 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
2945 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
2946 | { |
2947 | struct nfs4_delegation *dp; | |
fe0750e5 | 2948 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2949 | int cb_up; |
d24433cd | 2950 | int status = 0, flag = 0; |
1da177e4 | 2951 | |
fe0750e5 | 2952 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2953 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2954 | open->op_recall = 0; |
2955 | switch (open->op_claim_type) { | |
2956 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2957 | if (!cb_up) |
7b190fec N |
2958 | open->op_recall = 1; |
2959 | flag = open->op_delegate_type; | |
2960 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2961 | goto out; | |
2962 | break; | |
2963 | case NFS4_OPEN_CLAIM_NULL: | |
2964 | /* Let's not give out any delegations till everyone's | |
2965 | * had the chance to reclaim theirs.... */ | |
5ccb0066 | 2966 | if (locks_in_grace(net)) |
7b190fec | 2967 | goto out; |
dad1c067 | 2968 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2969 | goto out; |
2970 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2971 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2972 | else | |
2973 | flag = NFS4_OPEN_DELEGATE_READ; | |
2974 | break; | |
2975 | default: | |
2976 | goto out; | |
2977 | } | |
1da177e4 | 2978 | |
fe0750e5 | 2979 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2980 | if (dp == NULL) |
2981 | goto out_no_deleg; | |
acfdf5c3 | 2982 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2983 | if (status) |
dd239cc0 | 2984 | goto out_free; |
1da177e4 | 2985 | |
d5477a8d | 2986 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2987 | |
8c10cbdb | 2988 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2989 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2990 | out: |
2991 | open->op_delegate_type = flag; | |
d24433cd BH |
2992 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2993 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2994 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2995 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2996 | ||
4aa8913c BH |
2997 | /* 4.1 client asking for a delegation? */ |
2998 | if (open->op_deleg_want) | |
2999 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 3000 | } |
dd239cc0 BF |
3001 | return; |
3002 | out_free: | |
acfdf5c3 | 3003 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3004 | out_no_deleg: |
3005 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3006 | goto out; | |
1da177e4 LT |
3007 | } |
3008 | ||
e27f49c3 BH |
3009 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3010 | struct nfs4_delegation *dp) | |
3011 | { | |
3012 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3013 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3014 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3015 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3016 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3017 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3018 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3019 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3020 | } | |
3021 | /* Otherwise the client must be confused wanting a delegation | |
3022 | * it already has, therefore we don't return | |
3023 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3024 | */ | |
3025 | } | |
3026 | ||
1da177e4 LT |
3027 | /* |
3028 | * called with nfs4_lock_state() held. | |
3029 | */ | |
b37ad28b | 3030 | __be32 |
1da177e4 LT |
3031 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3032 | { | |
6668958f | 3033 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3034 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3035 | struct nfs4_file *fp = NULL; |
3036 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3037 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3038 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3039 | __be32 status; |
1da177e4 | 3040 | |
1da177e4 LT |
3041 | /* |
3042 | * Lookup file; if found, lookup stateid and check open request, | |
3043 | * and check for delegations in the process of being recalled. | |
3044 | * If not found, create the nfs4_file struct | |
3045 | */ | |
3046 | fp = find_file(ino); | |
3047 | if (fp) { | |
3048 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3049 | goto out; | |
38c2f4b1 | 3050 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3051 | if (status) |
3052 | goto out; | |
1da177e4 | 3053 | } else { |
c44c5eeb | 3054 | status = nfserr_bad_stateid; |
8b289b2c | 3055 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3056 | goto out; |
3e772463 | 3057 | status = nfserr_jukebox; |
32513b40 BF |
3058 | fp = open->op_file; |
3059 | open->op_file = NULL; | |
3060 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3061 | } |
3062 | ||
3063 | /* | |
3064 | * OPEN the file, or upgrade an existing OPEN. | |
3065 | * If truncate fails, the OPEN fails. | |
3066 | */ | |
3067 | if (stp) { | |
3068 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3069 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3070 | if (status) |
3071 | goto out; | |
3072 | } else { | |
4cdc951b | 3073 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
4af82504 BF |
3074 | if (status) |
3075 | goto out; | |
3076 | status = nfsd4_truncate(rqstp, current_fh, open); | |
567d9829 | 3077 | if (status) |
1da177e4 | 3078 | goto out; |
4cdc951b BF |
3079 | stp = open->op_stp; |
3080 | open->op_stp = NULL; | |
996e0938 | 3081 | init_open_stateid(stp, fp, open); |
1da177e4 | 3082 | } |
dcef0413 BF |
3083 | update_stateid(&stp->st_stid.sc_stateid); |
3084 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3085 | |
d24433cd | 3086 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3087 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3088 | |
d24433cd BH |
3089 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3090 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3091 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3092 | goto nodeleg; | |
3093 | } | |
3094 | } | |
3095 | ||
1da177e4 LT |
3096 | /* |
3097 | * Attempt to hand out a delegation. No error return, because the | |
3098 | * OPEN succeeds even if we fail. | |
3099 | */ | |
5ccb0066 | 3100 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
d24433cd | 3101 | nodeleg: |
1da177e4 LT |
3102 | status = nfs_ok; |
3103 | ||
8c10cbdb | 3104 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3105 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3106 | out: |
d24433cd BH |
3107 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3108 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3109 | open->op_deleg_want) |
3110 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3111 | |
13cd2184 N |
3112 | if (fp) |
3113 | put_nfs4_file(fp); | |
37515177 | 3114 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3115 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3116 | /* |
3117 | * To finish the open response, we just need to set the rflags. | |
3118 | */ | |
3119 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3120 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3121 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3122 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3123 | ||
3124 | return status; | |
3125 | } | |
3126 | ||
d29b20cd BF |
3127 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3128 | { | |
3129 | if (open->op_openowner) { | |
3130 | struct nfs4_openowner *oo = open->op_openowner; | |
3131 | ||
3132 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3133 | list_del_init(&oo->oo_close_lru); | |
3134 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3135 | if (status) { | |
3136 | release_openowner(oo); | |
3137 | open->op_openowner = NULL; | |
3138 | } else | |
3139 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3140 | } | |
3141 | } | |
32513b40 BF |
3142 | if (open->op_file) |
3143 | nfsd4_free_file(open->op_file); | |
4cdc951b | 3144 | if (open->op_stp) |
ef79859e | 3145 | free_generic_stateid(open->op_stp); |
d29b20cd BF |
3146 | } |
3147 | ||
b37ad28b | 3148 | __be32 |
b591480b BF |
3149 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3150 | clientid_t *clid) | |
1da177e4 LT |
3151 | { |
3152 | struct nfs4_client *clp; | |
b37ad28b | 3153 | __be32 status; |
7f2210fa | 3154 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
3155 | |
3156 | nfs4_lock_state(); | |
3157 | dprintk("process_renew(%08x/%08x): starting\n", | |
3158 | clid->cl_boot, clid->cl_id); | |
3159 | status = nfserr_stale_clientid; | |
2c142baa | 3160 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3161 | goto out; |
d15c077e | 3162 | clp = find_confirmed_client(clid, cstate->minorversion); |
1da177e4 LT |
3163 | status = nfserr_expired; |
3164 | if (clp == NULL) { | |
3165 | /* We assume the client took too long to RENEW. */ | |
3166 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3167 | goto out; | |
3168 | } | |
1da177e4 | 3169 | status = nfserr_cb_path_down; |
ea1da636 | 3170 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3171 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3172 | goto out; |
3173 | status = nfs_ok; | |
3174 | out: | |
3175 | nfs4_unlock_state(); | |
3176 | return status; | |
3177 | } | |
3178 | ||
a76b4319 | 3179 | static void |
5e1533c7 | 3180 | nfsd4_end_grace(struct net *net) |
a76b4319 | 3181 | { |
5e1533c7 SK |
3182 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
3183 | ||
33dcc481 | 3184 | /* do nothing if grace period already ended */ |
a51c84ed | 3185 | if (nn->grace_ended) |
33dcc481 JL |
3186 | return; |
3187 | ||
a76b4319 | 3188 | dprintk("NFSD: end of grace period\n"); |
a51c84ed | 3189 | nn->grace_ended = true; |
2c142baa | 3190 | nfsd4_record_grace_done(net, nn->boot_time); |
5e1533c7 | 3191 | locks_end_grace(&nn->nfsd4_manager); |
e46b498c BF |
3192 | /* |
3193 | * Now that every NFSv4 client has had the chance to recover and | |
3194 | * to see the (possibly new, possibly shorter) lease time, we | |
3195 | * can safely set the next grace time to the current lease time: | |
3196 | */ | |
3197 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3198 | } |
3199 | ||
fd39ca9a | 3200 | static time_t |
1da177e4 LT |
3201 | nfs4_laundromat(void) |
3202 | { | |
3203 | struct nfs4_client *clp; | |
fe0750e5 | 3204 | struct nfs4_openowner *oo; |
1da177e4 LT |
3205 | struct nfs4_delegation *dp; |
3206 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3207 | time_t cutoff = get_seconds() - nfsd4_lease; |
3208 | time_t t, clientid_val = nfsd4_lease; | |
3209 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3210 | |
3211 | nfs4_lock_state(); | |
3212 | ||
3213 | dprintk("NFSD: laundromat service - starting\n"); | |
5e1533c7 | 3214 | nfsd4_end_grace(&init_net); |
36acb66b BH |
3215 | INIT_LIST_HEAD(&reaplist); |
3216 | spin_lock(&client_lock); | |
1da177e4 LT |
3217 | list_for_each_safe(pos, next, &client_lru) { |
3218 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3219 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3220 | t = clp->cl_time - cutoff; | |
3221 | if (clientid_val > t) | |
3222 | clientid_val = t; | |
3223 | break; | |
3224 | } | |
d7682988 BH |
3225 | if (atomic_read(&clp->cl_refcount)) { |
3226 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3227 | clp->cl_clientid.cl_id); | |
3228 | continue; | |
3229 | } | |
3230 | unhash_client_locked(clp); | |
3231 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3232 | } |
3233 | spin_unlock(&client_lock); | |
3234 | list_for_each_safe(pos, next, &reaplist) { | |
3235 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3236 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3237 | clp->cl_clientid.cl_id); | |
3238 | expire_client(clp); | |
3239 | } | |
1da177e4 LT |
3240 | spin_lock(&recall_lock); |
3241 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3242 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3243 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3244 | u = dp->dl_time - cutoff; | |
3245 | if (test_val > u) | |
3246 | test_val = u; | |
3247 | break; | |
3248 | } | |
1da177e4 LT |
3249 | list_move(&dp->dl_recall_lru, &reaplist); |
3250 | } | |
3251 | spin_unlock(&recall_lock); | |
3252 | list_for_each_safe(pos, next, &reaplist) { | |
3253 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3254 | unhash_delegation(dp); |
3255 | } | |
cf07d2ea | 3256 | test_val = nfsd4_lease; |
1da177e4 | 3257 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3258 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3259 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3260 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3261 | if (test_val > u) |
3262 | test_val = u; | |
3263 | break; | |
3264 | } | |
fe0750e5 | 3265 | release_openowner(oo); |
1da177e4 LT |
3266 | } |
3267 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3268 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3269 | nfs4_unlock_state(); | |
3270 | return clientid_val; | |
3271 | } | |
3272 | ||
a254b246 HH |
3273 | static struct workqueue_struct *laundry_wq; |
3274 | static void laundromat_main(struct work_struct *); | |
3275 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3276 | ||
3277 | static void | |
c4028958 | 3278 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3279 | { |
3280 | time_t t; | |
3281 | ||
3282 | t = nfs4_laundromat(); | |
3283 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3284 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3285 | } |
3286 | ||
f7a4d872 | 3287 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3288 | { |
f7a4d872 BF |
3289 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3290 | return nfserr_bad_stateid; | |
3291 | return nfs_ok; | |
1da177e4 LT |
3292 | } |
3293 | ||
3294 | static int | |
2c142baa | 3295 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
1da177e4 | 3296 | { |
2c142baa | 3297 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
e4e83ea4 BF |
3298 | return 0; |
3299 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3300 | STATEID_VAL(stateid)); |
e4e83ea4 | 3301 | return 1; |
1da177e4 LT |
3302 | } |
3303 | ||
3304 | static inline int | |
82c5ff1b | 3305 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3306 | { |
82c5ff1b JL |
3307 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3308 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3309 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3310 | } |
3311 | ||
3312 | static inline int | |
82c5ff1b | 3313 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3314 | { |
82c5ff1b JL |
3315 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3316 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3317 | } |
3318 | ||
3319 | static | |
dcef0413 | 3320 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3321 | { |
b37ad28b | 3322 | __be32 status = nfserr_openmode; |
1da177e4 | 3323 | |
02921914 BF |
3324 | /* For lock stateid's, we test the parent open, not the lock: */ |
3325 | if (stp->st_openstp) | |
3326 | stp = stp->st_openstp; | |
82c5ff1b | 3327 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3328 | goto out; |
82c5ff1b | 3329 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3330 | goto out; |
3331 | status = nfs_ok; | |
3332 | out: | |
3333 | return status; | |
3334 | } | |
3335 | ||
b37ad28b | 3336 | static inline __be32 |
5ccb0066 | 3337 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 3338 | { |
203a8c8e | 3339 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3340 | return nfs_ok; |
5ccb0066 | 3341 | else if (locks_in_grace(net)) { |
25985edc | 3342 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3343 | * conflicting state; so we must wait out the grace period. */ |
3344 | return nfserr_grace; | |
3345 | } else if (flags & WR_STATE) | |
3346 | return nfs4_share_conflict(current_fh, | |
3347 | NFS4_SHARE_DENY_WRITE); | |
3348 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3349 | return nfs4_share_conflict(current_fh, | |
3350 | NFS4_SHARE_DENY_READ); | |
3351 | } | |
3352 | ||
3353 | /* | |
3354 | * Allow READ/WRITE during grace period on recovered state only for files | |
3355 | * that are not able to provide mandatory locking. | |
3356 | */ | |
3357 | static inline int | |
5ccb0066 | 3358 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 3359 | { |
5ccb0066 | 3360 | return locks_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
3361 | } |
3362 | ||
81b82965 BF |
3363 | /* Returns true iff a is later than b: */ |
3364 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3365 | { | |
3366 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3367 | } | |
3368 | ||
57b7b43b | 3369 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3370 | { |
6668958f AA |
3371 | /* |
3372 | * When sessions are used the stateid generation number is ignored | |
3373 | * when it is zero. | |
3374 | */ | |
28dde241 | 3375 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3376 | return nfs_ok; |
3377 | ||
3378 | if (in->si_generation == ref->si_generation) | |
3379 | return nfs_ok; | |
6668958f | 3380 | |
0836f587 | 3381 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3382 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3383 | return nfserr_bad_stateid; |
3384 | /* | |
81b82965 BF |
3385 | * However, we could see a stateid from the past, even from a |
3386 | * non-buggy client. For example, if the client sends a lock | |
3387 | * while some IO is outstanding, the lock may bump si_generation | |
3388 | * while the IO is still in flight. The client could avoid that | |
3389 | * situation by waiting for responses on all the IO requests, | |
3390 | * but better performance may result in retrying IO that | |
3391 | * receives an old_stateid error if requests are rarely | |
3392 | * reordered in flight: | |
0836f587 | 3393 | */ |
81b82965 | 3394 | return nfserr_old_stateid; |
0836f587 BF |
3395 | } |
3396 | ||
7df302f7 | 3397 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3398 | { |
97b7e3b6 BF |
3399 | struct nfs4_stid *s; |
3400 | struct nfs4_ol_stateid *ols; | |
3401 | __be32 status; | |
17456804 | 3402 | |
7df302f7 CL |
3403 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3404 | return nfserr_bad_stateid; | |
3405 | /* Client debugging aid. */ | |
3406 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { | |
3407 | char addr_str[INET6_ADDRSTRLEN]; | |
3408 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, | |
3409 | sizeof(addr_str)); | |
3410 | pr_warn_ratelimited("NFSD: client %s testing state ID " | |
3411 | "with incorrect client ID\n", addr_str); | |
3412 | return nfserr_bad_stateid; | |
3413 | } | |
38c2f4b1 | 3414 | s = find_stateid(cl, stateid); |
97b7e3b6 | 3415 | if (!s) |
7df302f7 | 3416 | return nfserr_bad_stateid; |
36279ac1 | 3417 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3418 | if (status) |
97b7e3b6 BF |
3419 | return status; |
3420 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3421 | return nfs_ok; | |
3422 | ols = openlockstateid(s); | |
3423 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3424 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3425 | return nfserr_bad_stateid; |
3426 | return nfs_ok; | |
17456804 BS |
3427 | } |
3428 | ||
d15c077e | 3429 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) |
38c2f4b1 BF |
3430 | { |
3431 | struct nfs4_client *cl; | |
2c142baa | 3432 | struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); |
38c2f4b1 BF |
3433 | |
3434 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3435 | return nfserr_bad_stateid; | |
2c142baa | 3436 | if (STALE_STATEID(stateid, nn)) |
38c2f4b1 | 3437 | return nfserr_stale_stateid; |
d15c077e | 3438 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions); |
38c2f4b1 BF |
3439 | if (!cl) |
3440 | return nfserr_expired; | |
3441 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3442 | if (!*s) | |
3443 | return nfserr_bad_stateid; | |
3444 | return nfs_ok; | |
3445 | ||
3446 | } | |
3447 | ||
1da177e4 LT |
3448 | /* |
3449 | * Checks for stateid operations | |
3450 | */ | |
b37ad28b | 3451 | __be32 |
5ccb0066 | 3452 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
dd453dfd | 3453 | stateid_t *stateid, int flags, struct file **filpp) |
1da177e4 | 3454 | { |
69064a27 | 3455 | struct nfs4_stid *s; |
dcef0413 | 3456 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3457 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3458 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3459 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3460 | __be32 status; |
1da177e4 | 3461 | |
1da177e4 LT |
3462 | if (filpp) |
3463 | *filpp = NULL; | |
3464 | ||
5ccb0066 | 3465 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
3466 | return nfserr_grace; |
3467 | ||
3468 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
5ccb0066 | 3469 | return check_special_stateids(net, current_fh, stateid, flags); |
1da177e4 | 3470 | |
d15c077e | 3471 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); |
38c2f4b1 BF |
3472 | if (status) |
3473 | return status; | |
69064a27 BF |
3474 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3475 | if (status) | |
3476 | goto out; | |
f7a4d872 BF |
3477 | switch (s->sc_type) { |
3478 | case NFS4_DELEG_STID: | |
69064a27 | 3479 | dp = delegstateid(s); |
dc9bf700 BF |
3480 | status = nfs4_check_delegmode(dp, flags); |
3481 | if (status) | |
3482 | goto out; | |
43b0178e | 3483 | if (filpp) { |
acfdf5c3 | 3484 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3485 | BUG_ON(!*filpp); |
3486 | } | |
f7a4d872 BF |
3487 | break; |
3488 | case NFS4_OPEN_STID: | |
3489 | case NFS4_LOCK_STID: | |
69064a27 | 3490 | stp = openlockstateid(s); |
f7a4d872 BF |
3491 | status = nfs4_check_fh(current_fh, stp); |
3492 | if (status) | |
1da177e4 | 3493 | goto out; |
fe0750e5 | 3494 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3495 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3496 | goto out; |
a4455be0 BF |
3497 | status = nfs4_check_openmode(stp, flags); |
3498 | if (status) | |
1da177e4 | 3499 | goto out; |
f9d7562f BF |
3500 | if (filpp) { |
3501 | if (flags & RD_STATE) | |
3502 | *filpp = find_readable_file(stp->st_file); | |
3503 | else | |
3504 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3505 | } |
f7a4d872 BF |
3506 | break; |
3507 | default: | |
3508 | return nfserr_bad_stateid; | |
1da177e4 LT |
3509 | } |
3510 | status = nfs_ok; | |
3511 | out: | |
3512 | return status; | |
3513 | } | |
3514 | ||
e1ca12df | 3515 | static __be32 |
dcef0413 | 3516 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3517 | { |
fe0750e5 | 3518 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3519 | return nfserr_locks_held; |
3520 | release_lock_stateid(stp); | |
3521 | return nfs_ok; | |
3522 | } | |
3523 | ||
17456804 BS |
3524 | /* |
3525 | * Test if the stateid is valid | |
3526 | */ | |
3527 | __be32 | |
3528 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3529 | struct nfsd4_test_stateid *test_stateid) | |
3530 | { | |
03cfb420 BS |
3531 | struct nfsd4_test_stateid_id *stateid; |
3532 | struct nfs4_client *cl = cstate->session->se_client; | |
3533 | ||
3534 | nfs4_lock_state(); | |
3535 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
7df302f7 CL |
3536 | stateid->ts_id_status = |
3537 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 BS |
3538 | nfs4_unlock_state(); |
3539 | ||
17456804 BS |
3540 | return nfs_ok; |
3541 | } | |
3542 | ||
e1ca12df BS |
3543 | __be32 |
3544 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3545 | struct nfsd4_free_stateid *free_stateid) | |
3546 | { | |
3547 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3548 | struct nfs4_stid *s; |
38c2f4b1 | 3549 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3550 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3551 | |
3552 | nfs4_lock_state(); | |
38c2f4b1 | 3553 | s = find_stateid(cl, stateid); |
2da1cec7 | 3554 | if (!s) |
81b82965 | 3555 | goto out; |
2da1cec7 BF |
3556 | switch (s->sc_type) { |
3557 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3558 | ret = nfserr_locks_held; |
3559 | goto out; | |
2da1cec7 BF |
3560 | case NFS4_OPEN_STID: |
3561 | case NFS4_LOCK_STID: | |
3562 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3563 | if (ret) | |
3564 | goto out; | |
3565 | if (s->sc_type == NFS4_LOCK_STID) | |
3566 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3567 | else | |
3568 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3569 | break; |
3570 | default: | |
3571 | ret = nfserr_bad_stateid; | |
e1ca12df | 3572 | } |
e1ca12df BS |
3573 | out: |
3574 | nfs4_unlock_state(); | |
3575 | return ret; | |
3576 | } | |
3577 | ||
4c4cd222 N |
3578 | static inline int |
3579 | setlkflg (int type) | |
3580 | { | |
3581 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3582 | RD_STATE : WR_STATE; | |
3583 | } | |
1da177e4 | 3584 | |
dcef0413 | 3585 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3586 | { |
3587 | struct svc_fh *current_fh = &cstate->current_fh; | |
3588 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3589 | __be32 status; | |
3590 | ||
c0a5d93e BF |
3591 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3592 | if (status) | |
3593 | return status; | |
f7a4d872 BF |
3594 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3595 | /* | |
3596 | * "Closed" stateid's exist *only* to return | |
3597 | * nfserr_replay_me from the previous step. | |
3598 | */ | |
3599 | return nfserr_bad_stateid; | |
3600 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3601 | if (status) | |
3602 | return status; | |
3603 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3604 | } |
3605 | ||
1da177e4 LT |
3606 | /* |
3607 | * Checks for sequence id mutating operations. | |
3608 | */ | |
b37ad28b | 3609 | static __be32 |
dd453dfd | 3610 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3611 | stateid_t *stateid, char typemask, |
dcef0413 | 3612 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3613 | { |
0836f587 | 3614 | __be32 status; |
38c2f4b1 | 3615 | struct nfs4_stid *s; |
1da177e4 | 3616 | |
8c10cbdb BH |
3617 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3618 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3619 | |
1da177e4 | 3620 | *stpp = NULL; |
d15c077e | 3621 | status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); |
c0a5d93e BF |
3622 | if (status) |
3623 | return status; | |
38c2f4b1 | 3624 | *stpp = openlockstateid(s); |
c0a5d93e | 3625 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3626 | |
c0a5d93e BF |
3627 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3628 | } | |
39325bd0 | 3629 | |
dcef0413 | 3630 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3631 | { |
3632 | __be32 status; | |
3633 | struct nfs4_openowner *oo; | |
1da177e4 | 3634 | |
c0a5d93e | 3635 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3636 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3637 | if (status) |
3638 | return status; | |
c0a5d93e | 3639 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3640 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3641 | return nfserr_bad_stateid; |
3a4f98bb | 3642 | return nfs_ok; |
1da177e4 LT |
3643 | } |
3644 | ||
b37ad28b | 3645 | __be32 |
ca364317 | 3646 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3647 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3648 | { |
b37ad28b | 3649 | __be32 status; |
fe0750e5 | 3650 | struct nfs4_openowner *oo; |
dcef0413 | 3651 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3652 | |
3653 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3654 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3655 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3656 | |
ca364317 | 3657 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3658 | if (status) |
3659 | return status; | |
1da177e4 LT |
3660 | |
3661 | nfs4_lock_state(); | |
3662 | ||
9072d5c6 | 3663 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3664 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3665 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3666 | if (status) |
68b66e82 | 3667 | goto out; |
fe0750e5 | 3668 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3669 | status = nfserr_bad_stateid; |
dad1c067 | 3670 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3671 | goto out; |
dad1c067 | 3672 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3673 | update_stateid(&stp->st_stid.sc_stateid); |
3674 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3675 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3676 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3677 | |
2a4317c5 | 3678 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3679 | status = nfs_ok; |
1da177e4 | 3680 | out: |
5ec094c1 BF |
3681 | if (!cstate->replay_owner) |
3682 | nfs4_unlock_state(); | |
1da177e4 LT |
3683 | return status; |
3684 | } | |
3685 | ||
6409a5a6 | 3686 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3687 | { |
82c5ff1b | 3688 | if (!test_access(access, stp)) |
6409a5a6 BF |
3689 | return; |
3690 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3691 | clear_access(access, stp); |
6409a5a6 | 3692 | } |
f197c271 | 3693 | |
6409a5a6 BF |
3694 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3695 | { | |
3696 | switch (to_access) { | |
3697 | case NFS4_SHARE_ACCESS_READ: | |
3698 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3699 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3700 | break; | |
3701 | case NFS4_SHARE_ACCESS_WRITE: | |
3702 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3703 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3704 | break; | |
3705 | case NFS4_SHARE_ACCESS_BOTH: | |
3706 | break; | |
3707 | default: | |
3708 | BUG(); | |
1da177e4 LT |
3709 | } |
3710 | } | |
3711 | ||
3712 | static void | |
ce0fc43c | 3713 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3714 | { |
3715 | int i; | |
3716 | for (i = 0; i < 4; i++) { | |
3717 | if ((i & deny) != i) | |
ce0fc43c | 3718 | clear_deny(i, stp); |
1da177e4 LT |
3719 | } |
3720 | } | |
3721 | ||
b37ad28b | 3722 | __be32 |
ca364317 BF |
3723 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3724 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3725 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3726 | { |
b37ad28b | 3727 | __be32 status; |
dcef0413 | 3728 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3729 | |
3730 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3731 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3732 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3733 | |
c30e92df | 3734 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3735 | if (od->od_deleg_want) |
3736 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3737 | od->od_deleg_want); | |
1da177e4 LT |
3738 | |
3739 | nfs4_lock_state(); | |
c0a5d93e BF |
3740 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3741 | &od->od_stateid, &stp); | |
9072d5c6 | 3742 | if (status) |
1da177e4 | 3743 | goto out; |
1da177e4 | 3744 | status = nfserr_inval; |
82c5ff1b JL |
3745 | if (!test_access(od->od_share_access, stp)) { |
3746 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3747 | stp->st_access_bmap, od->od_share_access); |
3748 | goto out; | |
3749 | } | |
ce0fc43c | 3750 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3751 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3752 | stp->st_deny_bmap, od->od_share_deny); | |
3753 | goto out; | |
3754 | } | |
6409a5a6 | 3755 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3756 | |
ce0fc43c | 3757 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3758 | |
dcef0413 BF |
3759 | update_stateid(&stp->st_stid.sc_stateid); |
3760 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3761 | status = nfs_ok; |
3762 | out: | |
5ec094c1 BF |
3763 | if (!cstate->replay_owner) |
3764 | nfs4_unlock_state(); | |
1da177e4 LT |
3765 | return status; |
3766 | } | |
3767 | ||
38c387b5 BF |
3768 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3769 | { | |
3770 | struct nfs4_openowner *oo; | |
3771 | struct nfs4_ol_stateid *s; | |
3772 | ||
3773 | if (!so->so_is_open_owner) | |
3774 | return; | |
3775 | oo = openowner(so); | |
3776 | s = oo->oo_last_closed_stid; | |
3777 | if (!s) | |
3778 | return; | |
3779 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3780 | /* Release the last_closed_stid on the next seqid bump: */ | |
3781 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3782 | return; | |
3783 | } | |
3784 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3785 | release_last_closed_stateid(oo); |
3786 | } | |
3787 | ||
3788 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3789 | { | |
3790 | unhash_open_stateid(s); | |
3791 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3792 | } |
3793 | ||
1da177e4 LT |
3794 | /* |
3795 | * nfs4_unlock_state() called after encode | |
3796 | */ | |
b37ad28b | 3797 | __be32 |
ca364317 | 3798 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3799 | struct nfsd4_close *close) |
1da177e4 | 3800 | { |
b37ad28b | 3801 | __be32 status; |
fe0750e5 | 3802 | struct nfs4_openowner *oo; |
dcef0413 | 3803 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3804 | |
3805 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3806 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3807 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3808 | |
3809 | nfs4_lock_state(); | |
f7a4d872 BF |
3810 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3811 | &close->cl_stateid, | |
3812 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3813 | &stp); | |
9072d5c6 | 3814 | if (status) |
1da177e4 | 3815 | goto out; |
fe0750e5 | 3816 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3817 | status = nfs_ok; |
dcef0413 BF |
3818 | update_stateid(&stp->st_stid.sc_stateid); |
3819 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3820 | |
f7a4d872 | 3821 | nfsd4_close_open_stateid(stp); |
cf9182e9 | 3822 | release_last_closed_stateid(oo); |
38c387b5 | 3823 | oo->oo_last_closed_stid = stp; |
04ef5954 | 3824 | |
74dbafaf BF |
3825 | if (list_empty(&oo->oo_owner.so_stateids)) { |
3826 | if (cstate->minorversion) { | |
3827 | release_openowner(oo); | |
3828 | cstate->replay_owner = NULL; | |
3829 | } else { | |
3830 | /* | |
3831 | * In the 4.0 case we need to keep the owners around a | |
3832 | * little while to handle CLOSE replay. | |
3833 | */ | |
3834 | if (list_empty(&oo->oo_owner.so_stateids)) | |
3835 | move_to_close_lru(oo); | |
3836 | } | |
3837 | } | |
1da177e4 | 3838 | out: |
5ec094c1 BF |
3839 | if (!cstate->replay_owner) |
3840 | nfs4_unlock_state(); | |
1da177e4 LT |
3841 | return status; |
3842 | } | |
3843 | ||
b37ad28b | 3844 | __be32 |
ca364317 BF |
3845 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3846 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3847 | { |
203a8c8e BF |
3848 | struct nfs4_delegation *dp; |
3849 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3850 | struct nfs4_stid *s; |
b37ad28b | 3851 | __be32 status; |
1da177e4 | 3852 | |
ca364317 | 3853 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 3854 | return status; |
1da177e4 LT |
3855 | |
3856 | nfs4_lock_state(); | |
d15c077e | 3857 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); |
38c2f4b1 | 3858 | if (status) |
203a8c8e | 3859 | goto out; |
38c2f4b1 | 3860 | dp = delegstateid(s); |
d5477a8d | 3861 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3862 | if (status) |
3863 | goto out; | |
203a8c8e BF |
3864 | |
3865 | unhash_delegation(dp); | |
1da177e4 | 3866 | out: |
203a8c8e BF |
3867 | nfs4_unlock_state(); |
3868 | ||
1da177e4 LT |
3869 | return status; |
3870 | } | |
3871 | ||
3872 | ||
1da177e4 | 3873 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3874 | |
009673b4 BF |
3875 | #define LOCKOWNER_INO_HASH_BITS 8 |
3876 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3877 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3878 | |
87df4de8 BH |
3879 | static inline u64 |
3880 | end_offset(u64 start, u64 len) | |
3881 | { | |
3882 | u64 end; | |
3883 | ||
3884 | end = start + len; | |
3885 | return end >= start ? end: NFS4_MAX_UINT64; | |
3886 | } | |
3887 | ||
3888 | /* last octet in a range */ | |
3889 | static inline u64 | |
3890 | last_byte_offset(u64 start, u64 len) | |
3891 | { | |
3892 | u64 end; | |
3893 | ||
3894 | BUG_ON(!len); | |
3895 | end = start + len; | |
3896 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3897 | } | |
3898 | ||
009673b4 | 3899 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3900 | { |
3901 | return (file_hashval(inode) + cl_id | |
3902 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3903 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3904 | } |
3905 | ||
009673b4 | 3906 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3907 | |
1da177e4 LT |
3908 | /* |
3909 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3910 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3911 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3912 | * locking, this prevents us from being completely protocol-compliant. The | |
3913 | * real solution to this problem is to start using unsigned file offsets in | |
3914 | * the VFS, but this is a very deep change! | |
3915 | */ | |
3916 | static inline void | |
3917 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3918 | { | |
3919 | if (lock->fl_start < 0) | |
3920 | lock->fl_start = OFFSET_MAX; | |
3921 | if (lock->fl_end < 0) | |
3922 | lock->fl_end = OFFSET_MAX; | |
3923 | } | |
3924 | ||
d5b9026a N |
3925 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3926 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3927 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3928 | }; |
1da177e4 LT |
3929 | |
3930 | static inline void | |
3931 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3932 | { | |
fe0750e5 | 3933 | struct nfs4_lockowner *lo; |
1da177e4 | 3934 | |
d5b9026a | 3935 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3936 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3937 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3938 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3939 | if (!deny->ld_owner.data) |
3940 | /* We just don't care that much */ | |
3941 | goto nevermind; | |
fe0750e5 BF |
3942 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3943 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3944 | } else { |
7c13f344 BF |
3945 | nevermind: |
3946 | deny->ld_owner.len = 0; | |
3947 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3948 | deny->ld_clientid.cl_boot = 0; |
3949 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3950 | } |
3951 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3952 | deny->ld_length = NFS4_MAX_UINT64; |
3953 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3954 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3955 | deny->ld_type = NFS4_READ_LT; | |
3956 | if (fl->fl_type != F_RDLCK) | |
3957 | deny->ld_type = NFS4_WRITE_LT; | |
3958 | } | |
3959 | ||
b93d87c1 BF |
3960 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3961 | { | |
3962 | struct nfs4_ol_stateid *lst; | |
3963 | ||
3964 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3965 | return false; | |
3966 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3967 | struct nfs4_ol_stateid, st_perstateowner); | |
3968 | return lst->st_file->fi_inode == inode; | |
3969 | } | |
3970 | ||
fe0750e5 BF |
3971 | static struct nfs4_lockowner * |
3972 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3973 | struct xdr_netobj *owner) |
3974 | { | |
009673b4 | 3975 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3976 | struct nfs4_lockowner *lo; |
1da177e4 | 3977 | |
009673b4 | 3978 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3979 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3980 | return lo; | |
1da177e4 LT |
3981 | } |
3982 | return NULL; | |
3983 | } | |
3984 | ||
dcef0413 | 3985 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3986 | { |
009673b4 BF |
3987 | struct inode *inode = open_stp->st_file->fi_inode; |
3988 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3989 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3990 | ||
16bfdaaf | 3991 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3992 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3993 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3994 | } |
3995 | ||
1da177e4 LT |
3996 | /* |
3997 | * Alloc a lock owner structure. | |
3998 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3999 | * occurred. |
1da177e4 | 4000 | * |
16bfdaaf | 4001 | * strhashval = ownerstr_hashval |
1da177e4 LT |
4002 | */ |
4003 | ||
fe0750e5 | 4004 | static struct nfs4_lockowner * |
dcef0413 | 4005 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 4006 | struct nfs4_lockowner *lo; |
1da177e4 | 4007 | |
fe0750e5 BF |
4008 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
4009 | if (!lo) | |
1da177e4 | 4010 | return NULL; |
fe0750e5 BF |
4011 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
4012 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
4013 | /* It is the openowner seqid that will be incremented in encode in the |
4014 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4015 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4016 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4017 | return lo; | |
1da177e4 LT |
4018 | } |
4019 | ||
dcef0413 BF |
4020 | static struct nfs4_ol_stateid * |
4021 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4022 | { |
dcef0413 | 4023 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4024 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4025 | |
996e0938 | 4026 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4027 | if (stp == NULL) |
6136d2b4 | 4028 | return NULL; |
996e0938 | 4029 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4030 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4031 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4032 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4033 | get_nfs4_file(fp); |
1da177e4 | 4034 | stp->st_file = fp; |
0997b173 | 4035 | stp->st_access_bmap = 0; |
1da177e4 | 4036 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4037 | stp->st_openstp = open_stp; |
1da177e4 LT |
4038 | return stp; |
4039 | } | |
4040 | ||
fd39ca9a | 4041 | static int |
1da177e4 LT |
4042 | check_lock_length(u64 offset, u64 length) |
4043 | { | |
87df4de8 | 4044 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4045 | LOFF_OVERFLOW(offset, length))); |
4046 | } | |
4047 | ||
dcef0413 | 4048 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4049 | { |
4050 | struct nfs4_file *fp = lock_stp->st_file; | |
4051 | int oflag = nfs4_access_to_omode(access); | |
4052 | ||
82c5ff1b | 4053 | if (test_access(access, lock_stp)) |
0997b173 BF |
4054 | return; |
4055 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4056 | set_access(access, lock_stp); |
0997b173 BF |
4057 | } |
4058 | ||
2355c596 | 4059 | 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 |
4060 | { |
4061 | struct nfs4_file *fi = ost->st_file; | |
4062 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4063 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4064 | struct nfs4_lockowner *lo; | |
4065 | unsigned int strhashval; | |
4066 | ||
4067 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4068 | if (lo) { | |
4069 | if (!cstate->minorversion) | |
4070 | return nfserr_bad_seqid; | |
4071 | /* XXX: a lockowner always has exactly one stateid: */ | |
4072 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4073 | struct nfs4_ol_stateid, st_perstateowner); | |
4074 | return nfs_ok; | |
4075 | } | |
16bfdaaf | 4076 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4077 | &lock->v.new.owner); |
4078 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4079 | if (lo == NULL) | |
4080 | return nfserr_jukebox; | |
4081 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4082 | if (*lst == NULL) { | |
4083 | release_lockowner(lo); | |
4084 | return nfserr_jukebox; | |
4085 | } | |
4086 | *new = true; | |
4087 | return nfs_ok; | |
4088 | } | |
4089 | ||
1da177e4 LT |
4090 | /* |
4091 | * LOCK operation | |
4092 | */ | |
b37ad28b | 4093 | __be32 |
ca364317 | 4094 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4095 | struct nfsd4_lock *lock) |
1da177e4 | 4096 | { |
fe0750e5 BF |
4097 | struct nfs4_openowner *open_sop = NULL; |
4098 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4099 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4100 | struct file *filp = NULL; |
21179d81 JL |
4101 | struct file_lock *file_lock = NULL; |
4102 | struct file_lock *conflock = NULL; | |
b37ad28b | 4103 | __be32 status = 0; |
64a284d0 | 4104 | bool new_state = false; |
b34f27aa | 4105 | int lkflg; |
b8dd7b9a | 4106 | int err; |
7f2210fa | 4107 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4108 | |
4109 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4110 | (long long) lock->lk_offset, | |
4111 | (long long) lock->lk_length); | |
4112 | ||
1da177e4 LT |
4113 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4114 | return nfserr_inval; | |
4115 | ||
ca364317 | 4116 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4117 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4118 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4119 | return status; | |
4120 | } | |
4121 | ||
1da177e4 LT |
4122 | nfs4_lock_state(); |
4123 | ||
4124 | if (lock->lk_is_new) { | |
dcef0413 | 4125 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4126 | |
4127 | if (nfsd4_has_session(cstate)) | |
4128 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4129 | memcpy(&lock->v.new.clientid, | |
4130 | &cstate->session->se_client->cl_clientid, | |
4131 | sizeof(clientid_t)); | |
4132 | ||
1da177e4 | 4133 | status = nfserr_stale_clientid; |
2c142baa | 4134 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 4135 | goto out; |
1da177e4 | 4136 | |
1da177e4 | 4137 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4138 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4139 | lock->lk_new_open_seqid, |
4140 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4141 | &open_stp); |
37515177 | 4142 | if (status) |
1da177e4 | 4143 | goto out; |
fe0750e5 | 4144 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4145 | status = nfserr_bad_stateid; |
684e5638 | 4146 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4147 | &lock->v.new.clientid)) |
4148 | goto out; | |
64a284d0 BF |
4149 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4150 | &lock_stp, &new_state); | |
e1aaa891 | 4151 | } else |
dd453dfd | 4152 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4153 | lock->lk_old_lock_seqid, |
4154 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4155 | NFS4_LOCK_STID, &lock_stp); |
e1aaa891 BF |
4156 | if (status) |
4157 | goto out; | |
64a284d0 | 4158 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4159 | |
b34f27aa BF |
4160 | lkflg = setlkflg(lock->lk_type); |
4161 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4162 | if (status) | |
4163 | goto out; | |
4164 | ||
0dd395dc | 4165 | status = nfserr_grace; |
5ccb0066 | 4166 | if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) |
0dd395dc N |
4167 | goto out; |
4168 | status = nfserr_no_grace; | |
5ccb0066 | 4169 | if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) |
0dd395dc N |
4170 | goto out; |
4171 | ||
21179d81 JL |
4172 | file_lock = locks_alloc_lock(); |
4173 | if (!file_lock) { | |
4174 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4175 | status = nfserr_jukebox; | |
4176 | goto out; | |
4177 | } | |
4178 | ||
4179 | locks_init_lock(file_lock); | |
1da177e4 LT |
4180 | switch (lock->lk_type) { |
4181 | case NFS4_READ_LT: | |
4182 | case NFS4_READW_LT: | |
0997b173 BF |
4183 | filp = find_readable_file(lock_stp->st_file); |
4184 | if (filp) | |
4185 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
21179d81 | 4186 | file_lock->fl_type = F_RDLCK; |
529d7b2a | 4187 | break; |
1da177e4 LT |
4188 | case NFS4_WRITE_LT: |
4189 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4190 | filp = find_writeable_file(lock_stp->st_file); |
4191 | if (filp) | |
4192 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
21179d81 | 4193 | file_lock->fl_type = F_WRLCK; |
529d7b2a | 4194 | break; |
1da177e4 LT |
4195 | default: |
4196 | status = nfserr_inval; | |
4197 | goto out; | |
4198 | } | |
f9d7562f BF |
4199 | if (!filp) { |
4200 | status = nfserr_openmode; | |
4201 | goto out; | |
4202 | } | |
21179d81 JL |
4203 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
4204 | file_lock->fl_pid = current->tgid; | |
4205 | file_lock->fl_file = filp; | |
4206 | file_lock->fl_flags = FL_POSIX; | |
4207 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4208 | file_lock->fl_start = lock->lk_offset; | |
4209 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
4210 | nfs4_transform_lock_offset(file_lock); | |
4211 | ||
4212 | conflock = locks_alloc_lock(); | |
4213 | if (!conflock) { | |
4214 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4215 | status = nfserr_jukebox; | |
4216 | goto out; | |
4217 | } | |
1da177e4 | 4218 | |
21179d81 | 4219 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
b8dd7b9a | 4220 | switch (-err) { |
1da177e4 | 4221 | case 0: /* success! */ |
dcef0413 BF |
4222 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4223 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4224 | sizeof(stateid_t)); |
b8dd7b9a | 4225 | status = 0; |
eb76b3fd AA |
4226 | break; |
4227 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4228 | status = nfserr_denied; | |
4229 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 4230 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 4231 | break; |
1da177e4 LT |
4232 | case (EDEADLK): |
4233 | status = nfserr_deadlock; | |
eb76b3fd | 4234 | break; |
3e772463 | 4235 | default: |
fd85b817 | 4236 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4237 | status = nfserrno(err); |
eb76b3fd | 4238 | break; |
1da177e4 | 4239 | } |
1da177e4 | 4240 | out: |
64a284d0 | 4241 | if (status && new_state) |
f044ff83 | 4242 | release_lockowner(lock_sop); |
5ec094c1 BF |
4243 | if (!cstate->replay_owner) |
4244 | nfs4_unlock_state(); | |
21179d81 JL |
4245 | if (file_lock) |
4246 | locks_free_lock(file_lock); | |
4247 | if (conflock) | |
4248 | locks_free_lock(conflock); | |
1da177e4 LT |
4249 | return status; |
4250 | } | |
4251 | ||
55ef1274 BF |
4252 | /* |
4253 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4254 | * so we do a temporary open here just to get an open file to pass to | |
4255 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4256 | * inode operation.) | |
4257 | */ | |
04da6e9d | 4258 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4259 | { |
4260 | struct file *file; | |
04da6e9d AV |
4261 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4262 | if (!err) { | |
4263 | err = nfserrno(vfs_test_lock(file, lock)); | |
4264 | nfsd_close(file); | |
4265 | } | |
55ef1274 BF |
4266 | return err; |
4267 | } | |
4268 | ||
1da177e4 LT |
4269 | /* |
4270 | * LOCKT operation | |
4271 | */ | |
b37ad28b | 4272 | __be32 |
ca364317 BF |
4273 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4274 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4275 | { |
4276 | struct inode *inode; | |
21179d81 | 4277 | struct file_lock *file_lock = NULL; |
fe0750e5 | 4278 | struct nfs4_lockowner *lo; |
b37ad28b | 4279 | __be32 status; |
7f2210fa | 4280 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4281 | |
5ccb0066 | 4282 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
4283 | return nfserr_grace; |
4284 | ||
4285 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4286 | return nfserr_inval; | |
4287 | ||
1da177e4 LT |
4288 | nfs4_lock_state(); |
4289 | ||
4290 | status = nfserr_stale_clientid; | |
2c142baa | 4291 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) |
1da177e4 | 4292 | goto out; |
1da177e4 | 4293 | |
75c096f7 | 4294 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4295 | goto out; |
1da177e4 | 4296 | |
ca364317 | 4297 | inode = cstate->current_fh.fh_dentry->d_inode; |
21179d81 JL |
4298 | file_lock = locks_alloc_lock(); |
4299 | if (!file_lock) { | |
4300 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4301 | status = nfserr_jukebox; | |
4302 | goto out; | |
4303 | } | |
4304 | locks_init_lock(file_lock); | |
1da177e4 LT |
4305 | switch (lockt->lt_type) { |
4306 | case NFS4_READ_LT: | |
4307 | case NFS4_READW_LT: | |
21179d81 | 4308 | file_lock->fl_type = F_RDLCK; |
1da177e4 LT |
4309 | break; |
4310 | case NFS4_WRITE_LT: | |
4311 | case NFS4_WRITEW_LT: | |
21179d81 | 4312 | file_lock->fl_type = F_WRLCK; |
1da177e4 LT |
4313 | break; |
4314 | default: | |
2fdada03 | 4315 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4316 | status = nfserr_inval; |
4317 | goto out; | |
4318 | } | |
4319 | ||
fe0750e5 BF |
4320 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4321 | if (lo) | |
21179d81 JL |
4322 | file_lock->fl_owner = (fl_owner_t)lo; |
4323 | file_lock->fl_pid = current->tgid; | |
4324 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 4325 | |
21179d81 JL |
4326 | file_lock->fl_start = lockt->lt_offset; |
4327 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 4328 | |
21179d81 | 4329 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 4330 | |
21179d81 | 4331 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 4332 | if (status) |
fd85b817 | 4333 | goto out; |
04da6e9d | 4334 | |
21179d81 | 4335 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 4336 | status = nfserr_denied; |
21179d81 | 4337 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
4338 | } |
4339 | out: | |
4340 | nfs4_unlock_state(); | |
21179d81 JL |
4341 | if (file_lock) |
4342 | locks_free_lock(file_lock); | |
1da177e4 LT |
4343 | return status; |
4344 | } | |
4345 | ||
b37ad28b | 4346 | __be32 |
ca364317 | 4347 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4348 | struct nfsd4_locku *locku) |
1da177e4 | 4349 | { |
dcef0413 | 4350 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4351 | struct file *filp = NULL; |
21179d81 | 4352 | struct file_lock *file_lock = NULL; |
b37ad28b | 4353 | __be32 status; |
b8dd7b9a | 4354 | int err; |
1da177e4 LT |
4355 | |
4356 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4357 | (long long) locku->lu_offset, | |
4358 | (long long) locku->lu_length); | |
4359 | ||
4360 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4361 | return nfserr_inval; | |
4362 | ||
4363 | nfs4_lock_state(); | |
4364 | ||
9072d5c6 | 4365 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4366 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4367 | if (status) |
1da177e4 | 4368 | goto out; |
f9d7562f BF |
4369 | filp = find_any_file(stp->st_file); |
4370 | if (!filp) { | |
4371 | status = nfserr_lock_range; | |
4372 | goto out; | |
4373 | } | |
21179d81 JL |
4374 | file_lock = locks_alloc_lock(); |
4375 | if (!file_lock) { | |
4376 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
4377 | status = nfserr_jukebox; | |
4378 | goto out; | |
4379 | } | |
4380 | locks_init_lock(file_lock); | |
4381 | file_lock->fl_type = F_UNLCK; | |
4382 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); | |
4383 | file_lock->fl_pid = current->tgid; | |
4384 | file_lock->fl_file = filp; | |
4385 | file_lock->fl_flags = FL_POSIX; | |
4386 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
4387 | file_lock->fl_start = locku->lu_offset; | |
4388 | ||
4389 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
4390 | locku->lu_length); | |
4391 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 LT |
4392 | |
4393 | /* | |
4394 | * Try to unlock the file in the VFS. | |
4395 | */ | |
21179d81 | 4396 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
b8dd7b9a | 4397 | if (err) { |
fd85b817 | 4398 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4399 | goto out_nfserr; |
4400 | } | |
4401 | /* | |
4402 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4403 | */ | |
dcef0413 BF |
4404 | update_stateid(&stp->st_stid.sc_stateid); |
4405 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4406 | |
4407 | out: | |
71c3bcd7 BF |
4408 | if (!cstate->replay_owner) |
4409 | nfs4_unlock_state(); | |
21179d81 JL |
4410 | if (file_lock) |
4411 | locks_free_lock(file_lock); | |
1da177e4 LT |
4412 | return status; |
4413 | ||
4414 | out_nfserr: | |
b8dd7b9a | 4415 | status = nfserrno(err); |
1da177e4 LT |
4416 | goto out; |
4417 | } | |
4418 | ||
4419 | /* | |
4420 | * returns | |
4421 | * 1: locks held by lockowner | |
4422 | * 0: no locks held by lockowner | |
4423 | */ | |
4424 | static int | |
fe0750e5 | 4425 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4426 | { |
4427 | struct file_lock **flpp; | |
f9d7562f | 4428 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4429 | int status = 0; |
4430 | ||
b89f4321 | 4431 | lock_flocks(); |
1da177e4 | 4432 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4433 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4434 | status = 1; |
4435 | goto out; | |
796dadfd | 4436 | } |
1da177e4 LT |
4437 | } |
4438 | out: | |
b89f4321 | 4439 | unlock_flocks(); |
1da177e4 LT |
4440 | return status; |
4441 | } | |
4442 | ||
b37ad28b | 4443 | __be32 |
b591480b BF |
4444 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4445 | struct nfsd4_compound_state *cstate, | |
4446 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4447 | { |
4448 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4449 | struct nfs4_stateowner *sop; |
fe0750e5 | 4450 | struct nfs4_lockowner *lo; |
dcef0413 | 4451 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4452 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4453 | struct list_head matches; |
16bfdaaf | 4454 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4455 | __be32 status; |
7f2210fa | 4456 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
4457 | |
4458 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4459 | clid->cl_boot, clid->cl_id); | |
4460 | ||
4461 | /* XXX check for lease expiration */ | |
4462 | ||
4463 | status = nfserr_stale_clientid; | |
2c142baa | 4464 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4465 | return status; |
1da177e4 LT |
4466 | |
4467 | nfs4_lock_state(); | |
4468 | ||
3e9e3dbe | 4469 | status = nfserr_locks_held; |
3e9e3dbe | 4470 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4471 | |
16bfdaaf BF |
4472 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4473 | if (sop->so_is_open_owner) | |
4474 | continue; | |
06f1f864 BF |
4475 | if (!same_owner_str(sop, owner, clid)) |
4476 | continue; | |
4477 | list_for_each_entry(stp, &sop->so_stateids, | |
4478 | st_perstateowner) { | |
4479 | lo = lockowner(sop); | |
4480 | if (check_for_locks(stp->st_file, lo)) | |
4481 | goto out; | |
4482 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4483 | } |
3e9e3dbe N |
4484 | } |
4485 | /* Clients probably won't expect us to return with some (but not all) | |
4486 | * of the lockowner state released; so don't release any until all | |
4487 | * have been checked. */ | |
4488 | status = nfs_ok; | |
0fa822e4 | 4489 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4490 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4491 | lo_list); | |
0fa822e4 N |
4492 | /* unhash_stateowner deletes so_perclient only |
4493 | * for openowners. */ | |
fe0750e5 BF |
4494 | list_del(&lo->lo_list); |
4495 | release_lockowner(lo); | |
1da177e4 LT |
4496 | } |
4497 | out: | |
4498 | nfs4_unlock_state(); | |
4499 | return status; | |
4500 | } | |
4501 | ||
4502 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4503 | alloc_reclaim(void) |
1da177e4 | 4504 | { |
a55370a3 | 4505 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4506 | } |
4507 | ||
0ce0c2b5 | 4508 | bool |
a0af710a | 4509 | nfs4_has_reclaimed_state(const char *name) |
c7b9a459 | 4510 | { |
0ce0c2b5 | 4511 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 4512 | |
0ce0c2b5 JL |
4513 | crp = nfsd4_find_reclaim_client(name); |
4514 | return (crp && crp->cr_clp); | |
c7b9a459 N |
4515 | } |
4516 | ||
1da177e4 LT |
4517 | /* |
4518 | * failure => all reset bets are off, nfserr_no_grace... | |
4519 | */ | |
772a9bbb | 4520 | struct nfs4_client_reclaim * |
190e4fbf | 4521 | nfs4_client_to_reclaim(const char *name) |
1da177e4 LT |
4522 | { |
4523 | unsigned int strhashval; | |
772a9bbb | 4524 | struct nfs4_client_reclaim *crp; |
1da177e4 | 4525 | |
a55370a3 N |
4526 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4527 | crp = alloc_reclaim(); | |
772a9bbb JL |
4528 | if (crp) { |
4529 | strhashval = clientstr_hashval(name); | |
4530 | INIT_LIST_HEAD(&crp->cr_strhash); | |
4531 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
4532 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); | |
0ce0c2b5 | 4533 | crp->cr_clp = NULL; |
772a9bbb JL |
4534 | reclaim_str_hashtbl_size++; |
4535 | } | |
4536 | return crp; | |
1da177e4 LT |
4537 | } |
4538 | ||
ce30e539 JL |
4539 | void |
4540 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp) | |
4541 | { | |
4542 | list_del(&crp->cr_strhash); | |
4543 | kfree(crp); | |
4544 | reclaim_str_hashtbl_size--; | |
4545 | } | |
4546 | ||
2a4317c5 | 4547 | void |
1da177e4 LT |
4548 | nfs4_release_reclaim(void) |
4549 | { | |
4550 | struct nfs4_client_reclaim *crp = NULL; | |
4551 | int i; | |
4552 | ||
1da177e4 LT |
4553 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4554 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4555 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4556 | struct nfs4_client_reclaim, cr_strhash); | |
ce30e539 | 4557 | nfs4_remove_reclaim_record(crp); |
1da177e4 LT |
4558 | } |
4559 | } | |
4560 | BUG_ON(reclaim_str_hashtbl_size); | |
4561 | } | |
4562 | ||
4563 | /* | |
4564 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4565 | struct nfs4_client_reclaim * |
278c931c | 4566 | nfsd4_find_reclaim_client(const char *recdir) |
1da177e4 LT |
4567 | { |
4568 | unsigned int strhashval; | |
1da177e4 LT |
4569 | struct nfs4_client_reclaim *crp = NULL; |
4570 | ||
278c931c | 4571 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
1da177e4 | 4572 | |
278c931c | 4573 | strhashval = clientstr_hashval(recdir); |
1da177e4 | 4574 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
278c931c | 4575 | if (same_name(crp->cr_recdir, recdir)) { |
1da177e4 LT |
4576 | return crp; |
4577 | } | |
4578 | } | |
4579 | return NULL; | |
4580 | } | |
4581 | ||
4582 | /* | |
4583 | * Called from OPEN. Look for clientid in reclaim list. | |
4584 | */ | |
b37ad28b | 4585 | __be32 |
d15c077e | 4586 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions) |
1da177e4 | 4587 | { |
a52d726b JL |
4588 | struct nfs4_client *clp; |
4589 | ||
4590 | /* find clientid in conf_id_hashtbl */ | |
d15c077e | 4591 | clp = find_confirmed_client(clid, sessions); |
a52d726b JL |
4592 | if (clp == NULL) |
4593 | return nfserr_reclaim_bad; | |
4594 | ||
4595 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4596 | } |
4597 | ||
65178db4 BS |
4598 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4599 | ||
4600 | void nfsd_forget_clients(u64 num) | |
4601 | { | |
4602 | struct nfs4_client *clp, *next; | |
4603 | int count = 0; | |
4604 | ||
4605 | nfs4_lock_state(); | |
4606 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
65178db4 BS |
4607 | expire_client(clp); |
4608 | if (++count == num) | |
4609 | break; | |
4610 | } | |
4611 | nfs4_unlock_state(); | |
4612 | ||
4613 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4614 | } | |
4615 | ||
4616 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4617 | { | |
4618 | release_lockowner(lockowner(sop)); | |
4619 | } | |
4620 | ||
4621 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4622 | { | |
4623 | release_openowner(openowner(sop)); | |
4624 | } | |
4625 | ||
353de31b | 4626 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4627 | void (*release_sop)(struct nfs4_stateowner *)) |
4628 | { | |
4629 | int i, count = 0; | |
4630 | struct nfs4_stateowner *sop, *next; | |
4631 | ||
16bfdaaf BF |
4632 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4633 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4634 | if (sop->so_is_open_owner != is_open_owner) | |
4635 | continue; | |
65178db4 BS |
4636 | release_sop(sop); |
4637 | if (++count == num) | |
4638 | return count; | |
4639 | } | |
4640 | } | |
4641 | return count; | |
4642 | } | |
4643 | ||
4644 | void nfsd_forget_locks(u64 num) | |
4645 | { | |
4646 | int count; | |
4647 | ||
4648 | nfs4_lock_state(); | |
16bfdaaf | 4649 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4650 | nfs4_unlock_state(); |
4651 | ||
4652 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4653 | } | |
4654 | ||
4655 | void nfsd_forget_openowners(u64 num) | |
4656 | { | |
4657 | int count; | |
4658 | ||
4659 | nfs4_lock_state(); | |
16bfdaaf | 4660 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4661 | nfs4_unlock_state(); |
4662 | ||
4663 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4664 | } | |
4665 | ||
da5c80a9 | 4666 | static int nfsd_process_n_delegations(u64 num, struct list_head *list) |
65178db4 BS |
4667 | { |
4668 | int i, count = 0; | |
2d3475c0 BS |
4669 | struct nfs4_file *fp, *fnext; |
4670 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4671 | |
4672 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4673 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4674 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
a6d88f29 | 4675 | list_move(&dp->dl_recall_lru, list); |
65178db4 BS |
4676 | if (++count == num) |
4677 | return count; | |
4678 | } | |
4679 | } | |
4680 | } | |
2d3475c0 | 4681 | |
65178db4 BS |
4682 | return count; |
4683 | } | |
4684 | ||
4685 | void nfsd_forget_delegations(u64 num) | |
4686 | { | |
4687 | unsigned int count; | |
a6d88f29 SK |
4688 | LIST_HEAD(victims); |
4689 | struct nfs4_delegation *dp, *dnext; | |
4690 | ||
4691 | spin_lock(&recall_lock); | |
4692 | count = nfsd_process_n_delegations(num, &victims); | |
4693 | spin_unlock(&recall_lock); | |
65178db4 BS |
4694 | |
4695 | nfs4_lock_state(); | |
a6d88f29 SK |
4696 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) |
4697 | unhash_delegation(dp); | |
65178db4 BS |
4698 | nfs4_unlock_state(); |
4699 | ||
4700 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4701 | } | |
4702 | ||
4703 | void nfsd_recall_delegations(u64 num) | |
4704 | { | |
4705 | unsigned int count; | |
a6d88f29 SK |
4706 | LIST_HEAD(victims); |
4707 | struct nfs4_delegation *dp, *dnext; | |
65178db4 | 4708 | |
65178db4 | 4709 | spin_lock(&recall_lock); |
a6d88f29 SK |
4710 | count = nfsd_process_n_delegations(num, &victims); |
4711 | list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { | |
4712 | list_del(&dp->dl_recall_lru); | |
4713 | nfsd_break_one_deleg(dp); | |
4714 | } | |
65178db4 | 4715 | spin_unlock(&recall_lock); |
65178db4 BS |
4716 | |
4717 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4718 | } | |
4719 | ||
4720 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4721 | ||
ac4d8ff2 | 4722 | /* initialization to perform at module load time: */ |
1da177e4 | 4723 | |
72083396 | 4724 | void |
ac4d8ff2 | 4725 | nfs4_state_init(void) |
1da177e4 | 4726 | { |
72083396 | 4727 | int i; |
1da177e4 | 4728 | |
1da177e4 LT |
4729 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4730 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
1da177e4 | 4731 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
02cb2858 | 4732 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4733 | } |
ac55fdc4 JL |
4734 | conf_name_tree = RB_ROOT; |
4735 | unconf_name_tree = RB_ROOT; | |
5282fd72 ME |
4736 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4737 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4738 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4739 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4740 | } | |
16bfdaaf BF |
4741 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4742 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4743 | } |
009673b4 BF |
4744 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4745 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4746 | INIT_LIST_HEAD(&close_lru); |
4747 | INIT_LIST_HEAD(&client_lru); | |
4748 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4749 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4750 | } |
4751 | ||
c2f1a551 MS |
4752 | /* |
4753 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4754 | * client may quite reasonably hang on to a delegation as long as it has | |
4755 | * the inode cached. This becomes an obvious problem the first time a | |
4756 | * client's inode cache approaches the size of the server's total memory. | |
4757 | * | |
4758 | * For now we avoid this problem by imposing a hard limit on the number | |
4759 | * of delegations, which varies according to the server's memory size. | |
4760 | */ | |
4761 | static void | |
4762 | set_max_delegations(void) | |
4763 | { | |
4764 | /* | |
4765 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4766 | * estimates suggest that in the worst case (where every delegation | |
4767 | * is for a different inode), a delegation could take about 1.5K, | |
4768 | * giving a worst case usage of about 6% of memory. | |
4769 | */ | |
4770 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4771 | } | |
4772 | ||
ac4d8ff2 N |
4773 | /* initialization to perform when the nfsd service is started: */ |
4774 | ||
a6d6b781 JL |
4775 | int |
4776 | nfs4_state_start(void) | |
ac4d8ff2 | 4777 | { |
5e1533c7 SK |
4778 | struct net *net = &init_net; |
4779 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b5a1a81e BF |
4780 | int ret; |
4781 | ||
2a4317c5 JL |
4782 | /* |
4783 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4784 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4785 | * need to pass a net pointer into this function, take a reference | |
4786 | * to that instead and then do most of the rest of this on a per-net | |
4787 | * basis. | |
4788 | */ | |
5e1533c7 SK |
4789 | get_net(net); |
4790 | nfsd4_client_tracking_init(net); | |
2c142baa | 4791 | nn->boot_time = get_seconds(); |
5ccb0066 | 4792 | locks_start_grace(net, &nn->nfsd4_manager); |
a51c84ed | 4793 | nn->grace_ended = false; |
9a8db97e | 4794 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4795 | nfsd4_grace); |
b5a1a81e | 4796 | ret = set_callback_cred(); |
a6d6b781 JL |
4797 | if (ret) { |
4798 | ret = -ENOMEM; | |
4799 | goto out_recovery; | |
4800 | } | |
58da282b | 4801 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4802 | if (laundry_wq == NULL) { |
4803 | ret = -ENOMEM; | |
4804 | goto out_recovery; | |
4805 | } | |
b5a1a81e BF |
4806 | ret = nfsd4_create_callback_queue(); |
4807 | if (ret) | |
4808 | goto out_free_laundry; | |
e46b498c | 4809 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4810 | set_max_delegations(); |
b5a1a81e BF |
4811 | return 0; |
4812 | out_free_laundry: | |
4813 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4814 | out_recovery: |
5e1533c7 SK |
4815 | nfsd4_client_tracking_exit(net); |
4816 | put_net(net); | |
b5a1a81e | 4817 | return ret; |
1da177e4 LT |
4818 | } |
4819 | ||
ac55fdc4 | 4820 | /* should be called with the state lock held */ |
1da177e4 LT |
4821 | static void |
4822 | __nfs4_state_shutdown(void) | |
4823 | { | |
4824 | int i; | |
4825 | struct nfs4_client *clp = NULL; | |
4826 | struct nfs4_delegation *dp = NULL; | |
1da177e4 | 4827 | struct list_head *pos, *next, reaplist; |
ac55fdc4 | 4828 | struct rb_node *node, *tmp; |
1da177e4 | 4829 | |
1da177e4 LT |
4830 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4831 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4832 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
0d22f68f | 4833 | destroy_client(clp); |
1da177e4 | 4834 | } |
1da177e4 | 4835 | } |
ac55fdc4 JL |
4836 | |
4837 | node = rb_first(&unconf_name_tree); | |
4838 | while (node != NULL) { | |
4839 | tmp = node; | |
4840 | node = rb_next(tmp); | |
4841 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); | |
4842 | rb_erase(tmp, &unconf_name_tree); | |
4843 | destroy_client(clp); | |
4844 | } | |
4845 | ||
1da177e4 LT |
4846 | INIT_LIST_HEAD(&reaplist); |
4847 | spin_lock(&recall_lock); | |
4848 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4849 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4850 | list_move(&dp->dl_recall_lru, &reaplist); | |
4851 | } | |
4852 | spin_unlock(&recall_lock); | |
4853 | list_for_each_safe(pos, next, &reaplist) { | |
4854 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4855 | unhash_delegation(dp); |
4856 | } | |
4857 | ||
2a4317c5 JL |
4858 | nfsd4_client_tracking_exit(&init_net); |
4859 | put_net(&init_net); | |
1da177e4 LT |
4860 | } |
4861 | ||
4862 | void | |
4863 | nfs4_state_shutdown(void) | |
4864 | { | |
5e1533c7 SK |
4865 | struct net *net = &init_net; |
4866 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
4867 | ||
afe2c511 | 4868 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4869 | destroy_workqueue(laundry_wq); |
5e1533c7 | 4870 | locks_end_grace(&nn->nfsd4_manager); |
1da177e4 | 4871 | nfs4_lock_state(); |
1da177e4 | 4872 | __nfs4_state_shutdown(); |
1da177e4 | 4873 | nfs4_unlock_state(); |
c3935e30 | 4874 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4875 | } |
8b70484c TM |
4876 | |
4877 | static void | |
4878 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4879 | { | |
37c593c5 TM |
4880 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4881 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4882 | } |
4883 | ||
4884 | static void | |
4885 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4886 | { | |
37c593c5 TM |
4887 | if (cstate->minorversion) { |
4888 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4889 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4890 | } | |
4891 | } | |
4892 | ||
4893 | void | |
4894 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4895 | { | |
4896 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4897 | } |
4898 | ||
62cd4a59 TM |
4899 | /* |
4900 | * functions to set current state id | |
4901 | */ | |
9428fe1a TM |
4902 | void |
4903 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4904 | { | |
4905 | put_stateid(cstate, &odp->od_stateid); | |
4906 | } | |
4907 | ||
8b70484c TM |
4908 | void |
4909 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4910 | { | |
4911 | put_stateid(cstate, &open->op_stateid); | |
4912 | } | |
4913 | ||
62cd4a59 TM |
4914 | void |
4915 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4916 | { | |
4917 | put_stateid(cstate, &close->cl_stateid); | |
4918 | } | |
4919 | ||
4920 | void | |
4921 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4922 | { | |
4923 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4924 | } | |
4925 | ||
4926 | /* | |
4927 | * functions to consume current state id | |
4928 | */ | |
1e97b519 | 4929 | |
9428fe1a TM |
4930 | void |
4931 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4932 | { | |
4933 | get_stateid(cstate, &odp->od_stateid); | |
4934 | } | |
4935 | ||
4936 | void | |
4937 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4938 | { | |
4939 | get_stateid(cstate, &drp->dr_stateid); | |
4940 | } | |
4941 | ||
1e97b519 TM |
4942 | void |
4943 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4944 | { | |
4945 | get_stateid(cstate, &fsp->fr_stateid); | |
4946 | } | |
4947 | ||
4948 | void | |
4949 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4950 | { | |
4951 | get_stateid(cstate, &setattr->sa_stateid); | |
4952 | } | |
4953 | ||
8b70484c TM |
4954 | void |
4955 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4956 | { | |
4957 | get_stateid(cstate, &close->cl_stateid); | |
4958 | } | |
4959 | ||
4960 | void | |
62cd4a59 | 4961 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4962 | { |
62cd4a59 | 4963 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4964 | } |
30813e27 TM |
4965 | |
4966 | void | |
4967 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4968 | { | |
4969 | get_stateid(cstate, &read->rd_stateid); | |
4970 | } | |
4971 | ||
4972 | void | |
4973 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4974 | { | |
4975 | get_stateid(cstate, &write->wr_stateid); | |
4976 | } |