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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
bfa4b365 | 45 | #include "current_stateid.h" |
1da177e4 LT |
46 | |
47 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
48 | ||
49 | /* Globals */ | |
cf07d2ea | 50 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 51 | time_t nfsd4_grace = 90; |
fd39ca9a | 52 | static time_t boot_time; |
f32f3c2d BF |
53 | |
54 | #define all_ones {{~0,~0},~0} | |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
fe0750e5 | 73 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 74 | |
8b671b80 BF |
75 | /* Locking: */ |
76 | ||
77 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 78 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 79 | |
8b671b80 BF |
80 | /* |
81 | * Currently used for the del_recall_lru and file hash table. In an | |
82 | * effort to decrease the scope of the client_mutex, this spinlock may | |
83 | * eventually cover more: | |
84 | */ | |
85 | static DEFINE_SPINLOCK(recall_lock); | |
86 | ||
fe0750e5 BF |
87 | static struct kmem_cache *openowner_slab = NULL; |
88 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
89 | static struct kmem_cache *file_slab = NULL; |
90 | static struct kmem_cache *stateid_slab = NULL; | |
91 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
508dc6e1 BH |
99 | static void free_session(struct kref *); |
100 | ||
101 | /* Must be called under the client_lock */ | |
102 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
103 | { | |
104 | kref_put(&ses->se_ref, free_session); | |
105 | } | |
106 | ||
107 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
108 | { | |
109 | kref_get(&ses->se_ref); | |
110 | } | |
111 | ||
1da177e4 LT |
112 | void |
113 | nfs4_unlock_state(void) | |
114 | { | |
353ab6e9 | 115 | mutex_unlock(&client_mutex); |
1da177e4 LT |
116 | } |
117 | ||
118 | static inline u32 | |
119 | opaque_hashval(const void *ptr, int nbytes) | |
120 | { | |
121 | unsigned char *cptr = (unsigned char *) ptr; | |
122 | ||
123 | u32 x = 0; | |
124 | while (nbytes--) { | |
125 | x *= 37; | |
126 | x += *cptr++; | |
127 | } | |
128 | return x; | |
129 | } | |
130 | ||
1da177e4 LT |
131 | static struct list_head del_recall_lru; |
132 | ||
32513b40 BF |
133 | static void nfsd4_free_file(struct nfs4_file *f) |
134 | { | |
135 | kmem_cache_free(file_slab, f); | |
136 | } | |
137 | ||
13cd2184 N |
138 | static inline void |
139 | put_nfs4_file(struct nfs4_file *fi) | |
140 | { | |
8b671b80 BF |
141 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
142 | list_del(&fi->fi_hash); | |
143 | spin_unlock(&recall_lock); | |
144 | iput(fi->fi_inode); | |
32513b40 | 145 | nfsd4_free_file(fi); |
8b671b80 | 146 | } |
13cd2184 N |
147 | } |
148 | ||
149 | static inline void | |
150 | get_nfs4_file(struct nfs4_file *fi) | |
151 | { | |
8b671b80 | 152 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
153 | } |
154 | ||
ef0f3390 | 155 | static int num_delegations; |
c2f1a551 | 156 | unsigned int max_delegations; |
ef0f3390 N |
157 | |
158 | /* | |
159 | * Open owner state (share locks) | |
160 | */ | |
161 | ||
16bfdaaf BF |
162 | /* hash tables for lock and open owners */ |
163 | #define OWNER_HASH_BITS 8 | |
164 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
165 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 166 | |
16bfdaaf | 167 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
168 | { |
169 | unsigned int ret; | |
170 | ||
171 | ret = opaque_hashval(ownername->data, ownername->len); | |
172 | ret += clientid; | |
16bfdaaf | 173 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 174 | } |
ef0f3390 | 175 | |
16bfdaaf | 176 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
177 | |
178 | /* hash table for nfs4_file */ | |
179 | #define FILE_HASH_BITS 8 | |
180 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 181 | |
ddc04c41 BF |
182 | static unsigned int file_hashval(struct inode *ino) |
183 | { | |
184 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
185 | return hash_ptr(ino, FILE_HASH_BITS); | |
186 | } | |
187 | ||
ef0f3390 | 188 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 189 | |
998db52c | 190 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
191 | { |
192 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
193 | atomic_inc(&fp->fi_access[oflag]); | |
194 | } | |
195 | ||
998db52c BF |
196 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
197 | { | |
198 | if (oflag == O_RDWR) { | |
199 | __nfs4_file_get_access(fp, O_RDONLY); | |
200 | __nfs4_file_get_access(fp, O_WRONLY); | |
201 | } else | |
202 | __nfs4_file_get_access(fp, oflag); | |
203 | } | |
204 | ||
205 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
206 | { |
207 | if (fp->fi_fds[oflag]) { | |
208 | fput(fp->fi_fds[oflag]); | |
209 | fp->fi_fds[oflag] = NULL; | |
210 | } | |
211 | } | |
212 | ||
998db52c | 213 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
214 | { |
215 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 216 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
217 | /* |
218 | * It's also safe to get rid of the RDWR open *if* | |
219 | * we no longer have need of the other kind of access | |
220 | * or if we already have the other kind of open: | |
221 | */ | |
222 | if (fp->fi_fds[1-oflag] | |
223 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
224 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
225 | } |
226 | } | |
227 | ||
998db52c BF |
228 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
229 | { | |
230 | if (oflag == O_RDWR) { | |
231 | __nfs4_file_put_access(fp, O_RDONLY); | |
232 | __nfs4_file_put_access(fp, O_WRONLY); | |
233 | } else | |
234 | __nfs4_file_put_access(fp, oflag); | |
235 | } | |
236 | ||
6136d2b4 | 237 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 238 | { |
6136d2b4 | 239 | static int min_stateid = 0; |
38c2f4b1 | 240 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
241 | int new_stid; |
242 | int error; | |
243 | ||
38c2f4b1 | 244 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 245 | /* |
996e0938 BF |
246 | * Note: the necessary preallocation was done in |
247 | * nfs4_alloc_stateid(). The idr code caps the number of | |
248 | * preallocations that can exist at a time, but the state lock | |
249 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
250 | */ |
251 | BUG_ON(error); | |
252 | /* | |
253 | * It shouldn't be a problem to reuse an opaque stateid value. | |
254 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
255 | * example, a stray write retransmission could be accepted by | |
256 | * the server when it should have been rejected. Therefore, | |
257 | * adopt a trick from the sctp code to attempt to maximize the | |
258 | * amount of time until an id is reused, by ensuring they always | |
259 | * "increase" (mod INT_MAX): | |
260 | */ | |
36d44c60 | 261 | |
6136d2b4 BF |
262 | min_stateid = new_stid+1; |
263 | if (min_stateid == INT_MAX) | |
264 | min_stateid = 0; | |
265 | return new_stid; | |
36d44c60 BF |
266 | } |
267 | ||
996e0938 | 268 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
269 | { |
270 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 271 | int new_id; |
2a74aba7 BF |
272 | |
273 | stid->sc_type = type; | |
274 | stid->sc_client = cl; | |
275 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 276 | new_id = get_new_stid(stid); |
6136d2b4 | 277 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
278 | /* Will be incremented before return to client: */ |
279 | s->si_generation = 0; | |
996e0938 BF |
280 | } |
281 | ||
282 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
283 | { | |
284 | struct idr *stateids = &cl->cl_stateids; | |
285 | ||
286 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
287 | return NULL; | |
288 | /* | |
289 | * Note: if we fail here (or any time between now and the time | |
290 | * we actually get the new idr), we won't need to undo the idr | |
291 | * preallocation, since the idr code caps the number of | |
292 | * preallocated entries. | |
293 | */ | |
294 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
295 | } |
296 | ||
4cdc951b BF |
297 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
298 | { | |
299 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
300 | } | |
301 | ||
1da177e4 | 302 | static struct nfs4_delegation * |
dcef0413 | 303 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
304 | { |
305 | struct nfs4_delegation *dp; | |
306 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
307 | |
308 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
309 | /* |
310 | * Major work on the lease subsystem (for example, to support | |
311 | * calbacks on stat) will be required before we can support | |
312 | * write delegations properly. | |
313 | */ | |
314 | if (type != NFS4_OPEN_DELEGATE_READ) | |
315 | return NULL; | |
47f9940c MS |
316 | if (fp->fi_had_conflict) |
317 | return NULL; | |
c2f1a551 | 318 | if (num_delegations > max_delegations) |
ef0f3390 | 319 | return NULL; |
996e0938 | 320 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 321 | if (dp == NULL) |
1da177e4 | 322 | return dp; |
996e0938 | 323 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
324 | /* |
325 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
326 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
327 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
328 | */ |
329 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 330 | num_delegations++; |
ea1da636 N |
331 | INIT_LIST_HEAD(&dp->dl_perfile); |
332 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 333 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 334 | get_nfs4_file(fp); |
1da177e4 | 335 | dp->dl_file = fp; |
1da177e4 | 336 | dp->dl_type = type; |
6c02eaa1 | 337 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
338 | dp->dl_time = 0; |
339 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 340 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
341 | return dp; |
342 | } | |
343 | ||
344 | void | |
345 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
346 | { | |
347 | if (atomic_dec_and_test(&dp->dl_count)) { | |
348 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 349 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 350 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 351 | num_delegations--; |
1da177e4 LT |
352 | } |
353 | } | |
354 | ||
acfdf5c3 | 355 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 356 | { |
acfdf5c3 BF |
357 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
358 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
359 | fp->fi_lease = NULL; | |
4ee63624 | 360 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
361 | fp->fi_deleg_file = NULL; |
362 | } | |
1da177e4 LT |
363 | } |
364 | ||
6136d2b4 BF |
365 | static void unhash_stid(struct nfs4_stid *s) |
366 | { | |
38c2f4b1 BF |
367 | struct idr *stateids = &s->sc_client->cl_stateids; |
368 | ||
369 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
370 | } |
371 | ||
1da177e4 LT |
372 | /* Called under the state lock. */ |
373 | static void | |
374 | unhash_delegation(struct nfs4_delegation *dp) | |
375 | { | |
6136d2b4 | 376 | unhash_stid(&dp->dl_stid); |
ea1da636 | 377 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 378 | spin_lock(&recall_lock); |
5d926e8c | 379 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
380 | list_del_init(&dp->dl_recall_lru); |
381 | spin_unlock(&recall_lock); | |
acfdf5c3 | 382 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
383 | nfs4_put_delegation(dp); |
384 | } | |
385 | ||
386 | /* | |
387 | * SETCLIENTID state | |
388 | */ | |
389 | ||
36acb66b | 390 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
391 | static DEFINE_SPINLOCK(client_lock); |
392 | ||
1da177e4 LT |
393 | /* Hash tables for nfs4_clientid state */ |
394 | #define CLIENT_HASH_BITS 4 | |
395 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
396 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
397 | ||
ddc04c41 BF |
398 | static unsigned int clientid_hashval(u32 id) |
399 | { | |
400 | return id & CLIENT_HASH_MASK; | |
401 | } | |
402 | ||
403 | static unsigned int clientstr_hashval(const char *name) | |
404 | { | |
405 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
406 | } | |
407 | ||
1da177e4 LT |
408 | /* |
409 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
410 | * used in reboot/reset lease grace period processing | |
411 | * | |
412 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
413 | * setclientid_confirmed info. | |
414 | * | |
415 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
416 | * setclientid info. | |
417 | * | |
418 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
419 | * for lease renewal. | |
420 | * | |
421 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
422 | * for last close replay. | |
423 | */ | |
424 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
425 | static int reclaim_str_hashtbl_size = 0; | |
426 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
427 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
428 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
429 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
430 | static struct list_head client_lru; | |
431 | static struct list_head close_lru; | |
432 | ||
f9d7562f BF |
433 | /* |
434 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
435 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
436 | * only what share bits are currently in force, but also what | |
437 | * combinations of share bits previous opens have used. This allows us | |
438 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
439 | * return an error if the client attempt to downgrade to a combination | |
440 | * of share bits not explicable by closing some of its previous opens. | |
441 | * | |
442 | * XXX: This enforcement is actually incomplete, since we don't keep | |
443 | * track of access/deny bit combinations; so, e.g., we allow: | |
444 | * | |
445 | * OPEN allow read, deny write | |
446 | * OPEN allow both, deny none | |
447 | * DOWNGRADE allow read, deny none | |
448 | * | |
449 | * which we should reject. | |
450 | */ | |
5ae037e5 JL |
451 | static unsigned int |
452 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 453 | int i; |
5ae037e5 | 454 | unsigned int access = 0; |
f9d7562f | 455 | |
f9d7562f BF |
456 | for (i = 1; i < 4; i++) { |
457 | if (test_bit(i, &bmap)) | |
5ae037e5 | 458 | access |= i; |
f9d7562f | 459 | } |
5ae037e5 | 460 | return access; |
f9d7562f BF |
461 | } |
462 | ||
3a328614 | 463 | static bool |
dcef0413 | 464 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
465 | unsigned int access, deny; |
466 | ||
5ae037e5 JL |
467 | access = bmap_to_share_mode(stp->st_access_bmap); |
468 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 469 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
470 | return false; |
471 | return true; | |
f9d7562f BF |
472 | } |
473 | ||
82c5ff1b JL |
474 | /* set share access for a given stateid */ |
475 | static inline void | |
476 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
477 | { | |
478 | __set_bit(access, &stp->st_access_bmap); | |
479 | } | |
480 | ||
481 | /* clear share access for a given stateid */ | |
482 | static inline void | |
483 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
484 | { | |
485 | __clear_bit(access, &stp->st_access_bmap); | |
486 | } | |
487 | ||
488 | /* test whether a given stateid has access */ | |
489 | static inline bool | |
490 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
491 | { | |
492 | return test_bit(access, &stp->st_access_bmap); | |
493 | } | |
494 | ||
ce0fc43c JL |
495 | /* set share deny for a given stateid */ |
496 | static inline void | |
497 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
498 | { | |
499 | __set_bit(access, &stp->st_deny_bmap); | |
500 | } | |
501 | ||
502 | /* clear share deny for a given stateid */ | |
503 | static inline void | |
504 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
505 | { | |
506 | __clear_bit(access, &stp->st_deny_bmap); | |
507 | } | |
508 | ||
509 | /* test whether a given stateid is denying specific access */ | |
510 | static inline bool | |
511 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
512 | { | |
513 | return test_bit(access, &stp->st_deny_bmap); | |
f9d7562f BF |
514 | } |
515 | ||
516 | static int nfs4_access_to_omode(u32 access) | |
517 | { | |
8f34a430 | 518 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
519 | case NFS4_SHARE_ACCESS_READ: |
520 | return O_RDONLY; | |
521 | case NFS4_SHARE_ACCESS_WRITE: | |
522 | return O_WRONLY; | |
523 | case NFS4_SHARE_ACCESS_BOTH: | |
524 | return O_RDWR; | |
525 | } | |
526 | BUG(); | |
527 | } | |
528 | ||
82c5ff1b JL |
529 | /* release all access and file references for a given stateid */ |
530 | static void | |
531 | release_all_access(struct nfs4_ol_stateid *stp) | |
532 | { | |
533 | int i; | |
534 | ||
535 | for (i = 1; i < 4; i++) { | |
536 | if (test_access(i, stp)) | |
537 | nfs4_file_put_access(stp->st_file, | |
538 | nfs4_access_to_omode(i)); | |
539 | clear_access(i, stp); | |
540 | } | |
541 | } | |
542 | ||
dcef0413 | 543 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 544 | { |
529d7b2a BF |
545 | list_del(&stp->st_perfile); |
546 | list_del(&stp->st_perstateowner); | |
547 | } | |
548 | ||
dcef0413 | 549 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 550 | { |
82c5ff1b | 551 | release_all_access(stp); |
a96e5b90 | 552 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
553 | stp->st_file = NULL; |
554 | } | |
555 | ||
dcef0413 | 556 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 557 | { |
529d7b2a BF |
558 | kmem_cache_free(stateid_slab, stp); |
559 | } | |
560 | ||
dcef0413 | 561 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
562 | { |
563 | struct file *file; | |
564 | ||
565 | unhash_generic_stateid(stp); | |
6136d2b4 | 566 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
567 | file = find_any_file(stp->st_file); |
568 | if (file) | |
fe0750e5 | 569 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 570 | close_generic_stateid(stp); |
529d7b2a BF |
571 | free_generic_stateid(stp); |
572 | } | |
573 | ||
fe0750e5 | 574 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 575 | { |
dcef0413 | 576 | struct nfs4_ol_stateid *stp; |
529d7b2a | 577 | |
fe0750e5 BF |
578 | list_del(&lo->lo_owner.so_strhash); |
579 | list_del(&lo->lo_perstateid); | |
009673b4 | 580 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
581 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
582 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 583 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
584 | release_lock_stateid(stp); |
585 | } | |
586 | } | |
587 | ||
fe0750e5 | 588 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 589 | { |
fe0750e5 BF |
590 | unhash_lockowner(lo); |
591 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
592 | } |
593 | ||
594 | static void | |
dcef0413 | 595 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 596 | { |
fe0750e5 | 597 | struct nfs4_lockowner *lo; |
529d7b2a BF |
598 | |
599 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
600 | lo = list_entry(open_stp->st_lockowners.next, |
601 | struct nfs4_lockowner, lo_perstateid); | |
602 | release_lockowner(lo); | |
529d7b2a BF |
603 | } |
604 | } | |
605 | ||
38c387b5 | 606 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
607 | { |
608 | unhash_generic_stateid(stp); | |
609 | release_stateid_lockowners(stp); | |
38c387b5 BF |
610 | close_generic_stateid(stp); |
611 | } | |
612 | ||
613 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
614 | { | |
615 | unhash_open_stateid(stp); | |
6136d2b4 | 616 | unhash_stid(&stp->st_stid); |
2283963f BF |
617 | free_generic_stateid(stp); |
618 | } | |
619 | ||
fe0750e5 | 620 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 621 | { |
dcef0413 | 622 | struct nfs4_ol_stateid *stp; |
f1d110ca | 623 | |
fe0750e5 BF |
624 | list_del(&oo->oo_owner.so_strhash); |
625 | list_del(&oo->oo_perclient); | |
626 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
627 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 628 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 629 | release_open_stateid(stp); |
f1d110ca BF |
630 | } |
631 | } | |
632 | ||
f7a4d872 BF |
633 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
634 | { | |
635 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
636 | ||
637 | if (s) { | |
6136d2b4 | 638 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
639 | free_generic_stateid(s); |
640 | oo->oo_last_closed_stid = NULL; | |
641 | } | |
642 | } | |
643 | ||
fe0750e5 | 644 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 645 | { |
fe0750e5 BF |
646 | unhash_openowner(oo); |
647 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 648 | release_last_closed_stateid(oo); |
fe0750e5 | 649 | nfs4_free_openowner(oo); |
f1d110ca BF |
650 | } |
651 | ||
5282fd72 ME |
652 | #define SESSION_HASH_SIZE 512 |
653 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
654 | ||
655 | static inline int | |
656 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
657 | { | |
658 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
659 | ||
660 | return sid->sequence % SESSION_HASH_SIZE; | |
661 | } | |
662 | ||
8f199b82 | 663 | #ifdef NFSD_DEBUG |
5282fd72 ME |
664 | static inline void |
665 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
666 | { | |
667 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
668 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
669 | } | |
8f199b82 TM |
670 | #else |
671 | static inline void | |
672 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
673 | { | |
674 | } | |
675 | #endif | |
676 | ||
5282fd72 | 677 | |
ec6b5d7b AA |
678 | static void |
679 | gen_sessionid(struct nfsd4_session *ses) | |
680 | { | |
681 | struct nfs4_client *clp = ses->se_client; | |
682 | struct nfsd4_sessionid *sid; | |
683 | ||
684 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
685 | sid->clientid = clp->cl_clientid; | |
686 | sid->sequence = current_sessionid++; | |
687 | sid->reserved = 0; | |
688 | } | |
689 | ||
690 | /* | |
a649637c AA |
691 | * The protocol defines ca_maxresponssize_cached to include the size of |
692 | * the rpc header, but all we need to cache is the data starting after | |
693 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
694 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
695 | * value that is the number of bytes in our cache plus a few additional | |
696 | * bytes. In order to stay on the safe side, and not promise more than | |
697 | * we can cache, those additional bytes must be the minimum possible: 24 | |
698 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
699 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
700 | * for the SEQUENCE op response: | |
701 | */ | |
702 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
703 | ||
557ce264 AA |
704 | static void |
705 | free_session_slots(struct nfsd4_session *ses) | |
706 | { | |
707 | int i; | |
708 | ||
709 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
710 | kfree(ses->se_slots[i]); | |
711 | } | |
712 | ||
a649637c | 713 | /* |
efe0cb6d BF |
714 | * We don't actually need to cache the rpc and session headers, so we |
715 | * can allocate a little less for each slot: | |
716 | */ | |
717 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
718 | { | |
719 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
720 | } | |
721 | ||
5b6feee9 | 722 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 723 | { |
5b6feee9 BF |
724 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
725 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 726 | |
5b6feee9 BF |
727 | return size; |
728 | } | |
ec6b5d7b | 729 | |
5b6feee9 BF |
730 | /* |
731 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 732 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 733 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 734 | */ |
5b6feee9 | 735 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 736 | { |
5b6feee9 | 737 | int avail; |
ec6b5d7b | 738 | |
5b6feee9 | 739 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 740 | |
5b6feee9 BF |
741 | spin_lock(&nfsd_drc_lock); |
742 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
743 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
744 | num = min_t(int, num, avail / slotsize); | |
745 | nfsd_drc_mem_used += num * slotsize; | |
746 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 747 | |
5b6feee9 BF |
748 | return num; |
749 | } | |
ec6b5d7b | 750 | |
5b6feee9 BF |
751 | static void nfsd4_put_drc_mem(int slotsize, int num) |
752 | { | |
4bd9b0f4 | 753 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 754 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 755 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 756 | } |
ec6b5d7b | 757 | |
5b6feee9 BF |
758 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
759 | { | |
760 | struct nfsd4_session *new; | |
761 | int mem, i; | |
a649637c | 762 | |
5b6feee9 BF |
763 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
764 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
765 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 766 | |
5b6feee9 BF |
767 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
768 | if (!new) | |
769 | return NULL; | |
557ce264 | 770 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
771 | for (i = 0; i < numslots; i++) { |
772 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
773 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
774 | if (!new->se_slots[i]) | |
557ce264 | 775 | goto out_free; |
557ce264 | 776 | } |
5b6feee9 BF |
777 | return new; |
778 | out_free: | |
779 | while (i--) | |
780 | kfree(new->se_slots[i]); | |
781 | kfree(new); | |
782 | return NULL; | |
ec6b5d7b AA |
783 | } |
784 | ||
5b6feee9 | 785 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 786 | { |
5b6feee9 | 787 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 788 | |
5b6feee9 | 789 | new->maxreqs = numslots; |
d2b21743 MJ |
790 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
791 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
792 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
793 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
794 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
795 | } | |
ec6b5d7b | 796 | |
19cf5c02 BF |
797 | static void free_conn(struct nfsd4_conn *c) |
798 | { | |
799 | svc_xprt_put(c->cn_xprt); | |
800 | kfree(c); | |
801 | } | |
ec6b5d7b | 802 | |
19cf5c02 BF |
803 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
804 | { | |
805 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
806 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 807 | |
19cf5c02 BF |
808 | spin_lock(&clp->cl_lock); |
809 | if (!list_empty(&c->cn_persession)) { | |
810 | list_del(&c->cn_persession); | |
811 | free_conn(c); | |
812 | } | |
813 | spin_unlock(&clp->cl_lock); | |
eea49806 | 814 | nfsd4_probe_callback(clp); |
19cf5c02 | 815 | } |
ec6b5d7b | 816 | |
d29c374c | 817 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 818 | { |
c7662518 | 819 | struct nfsd4_conn *conn; |
ec6b5d7b | 820 | |
c7662518 BF |
821 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
822 | if (!conn) | |
db90681d | 823 | return NULL; |
c7662518 BF |
824 | svc_xprt_get(rqstp->rq_xprt); |
825 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 826 | conn->cn_flags = flags; |
db90681d BF |
827 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
828 | return conn; | |
829 | } | |
a649637c | 830 | |
328ead28 BF |
831 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
832 | { | |
833 | conn->cn_session = ses; | |
834 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
835 | } |
836 | ||
db90681d | 837 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 838 | { |
db90681d | 839 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 840 | |
c7662518 | 841 | spin_lock(&clp->cl_lock); |
328ead28 | 842 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 843 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
844 | } |
845 | ||
21b75b01 | 846 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 847 | { |
19cf5c02 | 848 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 849 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
850 | } |
851 | ||
1d1bc8f2 | 852 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 853 | { |
db90681d | 854 | struct nfsd4_conn *conn; |
21b75b01 | 855 | int ret; |
ec6b5d7b | 856 | |
1d1bc8f2 | 857 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
858 | if (!conn) |
859 | return nfserr_jukebox; | |
860 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
861 | ret = nfsd4_register_conn(conn); |
862 | if (ret) | |
863 | /* oops; xprt is already down: */ | |
864 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
24119673 WAA |
865 | if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && |
866 | dir & NFS4_CDFC4_BACK) { | |
867 | /* callback channel may be back up */ | |
868 | nfsd4_probe_callback(ses->se_client); | |
869 | } | |
c7662518 BF |
870 | return nfs_ok; |
871 | } | |
ec6b5d7b | 872 | |
1d1bc8f2 BF |
873 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
874 | { | |
875 | u32 dir = NFS4_CDFC4_FORE; | |
876 | ||
877 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
878 | dir |= NFS4_CDFC4_BACK; | |
879 | ||
880 | return nfsd4_new_conn(rqstp, ses, dir); | |
881 | } | |
882 | ||
883 | /* must be called under client_lock */ | |
19cf5c02 | 884 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 885 | { |
19cf5c02 BF |
886 | struct nfs4_client *clp = s->se_client; |
887 | struct nfsd4_conn *c; | |
ec6b5d7b | 888 | |
19cf5c02 BF |
889 | spin_lock(&clp->cl_lock); |
890 | while (!list_empty(&s->se_conns)) { | |
891 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
892 | list_del_init(&c->cn_persession); | |
893 | spin_unlock(&clp->cl_lock); | |
557ce264 | 894 | |
19cf5c02 BF |
895 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
896 | free_conn(c); | |
ec6b5d7b | 897 | |
19cf5c02 BF |
898 | spin_lock(&clp->cl_lock); |
899 | } | |
900 | spin_unlock(&clp->cl_lock); | |
c7662518 | 901 | } |
ec6b5d7b | 902 | |
508dc6e1 | 903 | static void free_session(struct kref *kref) |
c7662518 BF |
904 | { |
905 | struct nfsd4_session *ses; | |
906 | int mem; | |
907 | ||
bc2df47a | 908 | lockdep_assert_held(&client_lock); |
c7662518 | 909 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 910 | nfsd4_del_conns(ses); |
c7662518 BF |
911 | spin_lock(&nfsd_drc_lock); |
912 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
913 | nfsd_drc_mem_used -= mem; | |
914 | spin_unlock(&nfsd_drc_lock); | |
915 | free_session_slots(ses); | |
916 | kfree(ses); | |
917 | } | |
918 | ||
508dc6e1 BH |
919 | void nfsd4_put_session(struct nfsd4_session *ses) |
920 | { | |
921 | spin_lock(&client_lock); | |
922 | nfsd4_put_session_locked(ses); | |
923 | spin_unlock(&client_lock); | |
924 | } | |
925 | ||
ac7c46f2 | 926 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
927 | { |
928 | struct nfsd4_session *new; | |
929 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
930 | int numslots, slotsize; | |
57b7b43b | 931 | __be32 status; |
5b6feee9 BF |
932 | int idx; |
933 | ||
934 | /* | |
935 | * Note decreasing slot size below client's request may | |
936 | * make it difficult for client to function correctly, whereas | |
937 | * decreasing the number of slots will (just?) affect | |
938 | * performance. When short on memory we therefore prefer to | |
939 | * decrease number of slots instead of their size. | |
940 | */ | |
941 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
942 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
943 | if (numslots < 1) |
944 | return NULL; | |
5b6feee9 BF |
945 | |
946 | new = alloc_session(slotsize, numslots); | |
947 | if (!new) { | |
948 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 949 | return NULL; |
557ce264 | 950 | } |
5b6feee9 | 951 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 952 | |
ec6b5d7b AA |
953 | new->se_client = clp; |
954 | gen_sessionid(new); | |
ec6b5d7b | 955 | |
c7662518 BF |
956 | INIT_LIST_HEAD(&new->se_conns); |
957 | ||
ac7c46f2 | 958 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 959 | new->se_flags = cses->flags; |
8b5ce5cd | 960 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 961 | kref_init(&new->se_ref); |
5b6feee9 | 962 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 963 | spin_lock(&client_lock); |
ec6b5d7b | 964 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 965 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 966 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 967 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 968 | spin_unlock(&client_lock); |
ec6b5d7b | 969 | |
1d1bc8f2 | 970 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 971 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 972 | if (status) { |
508dc6e1 | 973 | spin_lock(&client_lock); |
c7662518 | 974 | free_session(&new->se_ref); |
508dc6e1 | 975 | spin_unlock(&client_lock); |
ac7c46f2 | 976 | return NULL; |
c7662518 | 977 | } |
dcbeaa68 | 978 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 979 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
980 | /* |
981 | * This is a little silly; with sessions there's no real | |
982 | * use for the callback address. Use the peer address | |
983 | * as a reasonable default for now, but consider fixing | |
984 | * the rpc client not to require an address in the | |
985 | * future: | |
986 | */ | |
edd76786 BF |
987 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
988 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 989 | } |
dcbeaa68 | 990 | nfsd4_probe_callback(clp); |
ac7c46f2 | 991 | return new; |
ec6b5d7b AA |
992 | } |
993 | ||
9089f1b4 | 994 | /* caller must hold client_lock */ |
5282fd72 ME |
995 | static struct nfsd4_session * |
996 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
997 | { | |
998 | struct nfsd4_session *elem; | |
999 | int idx; | |
1000 | ||
1001 | dump_sessionid(__func__, sessionid); | |
1002 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
1003 | /* Search in the appropriate list */ |
1004 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
1005 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1006 | NFS4_MAX_SESSIONID_LEN)) { | |
1007 | return elem; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | dprintk("%s: session not found\n", __func__); | |
1012 | return NULL; | |
1013 | } | |
1014 | ||
9089f1b4 | 1015 | /* caller must hold client_lock */ |
7116ed6b | 1016 | static void |
5282fd72 | 1017 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1018 | { |
1019 | list_del(&ses->se_hash); | |
4c649378 | 1020 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1021 | list_del(&ses->se_perclnt); |
4c649378 | 1022 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1023 | } |
1024 | ||
36acb66b | 1025 | /* must be called under the client_lock */ |
1da177e4 | 1026 | static inline void |
36acb66b | 1027 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1028 | { |
07cd4909 | 1029 | if (is_client_expired(clp)) { |
7447758b BF |
1030 | WARN_ON(1); |
1031 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
07cd4909 BH |
1032 | __func__, |
1033 | clp->cl_clientid.cl_boot, | |
1034 | clp->cl_clientid.cl_id); | |
1035 | return; | |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | dprintk("renewing client (clientid %08x/%08x)\n", |
1039 | clp->cl_clientid.cl_boot, | |
1040 | clp->cl_clientid.cl_id); | |
1041 | list_move_tail(&clp->cl_lru, &client_lru); | |
1042 | clp->cl_time = get_seconds(); | |
1043 | } | |
1044 | ||
36acb66b BH |
1045 | static inline void |
1046 | renew_client(struct nfs4_client *clp) | |
1047 | { | |
1048 | spin_lock(&client_lock); | |
1049 | renew_client_locked(clp); | |
1050 | spin_unlock(&client_lock); | |
1051 | } | |
1052 | ||
1da177e4 LT |
1053 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1054 | static int | |
1055 | STALE_CLIENTID(clientid_t *clid) | |
1056 | { | |
1057 | if (clid->cl_boot == boot_time) | |
1058 | return 0; | |
60adfc50 AA |
1059 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
1060 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
1061 | return 1; |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * XXX Should we use a slab cache ? | |
1066 | * This type of memory management is somewhat inefficient, but we use it | |
1067 | * anyway since SETCLIENTID is not a common operation. | |
1068 | */ | |
35bba9a3 | 1069 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1070 | { |
1071 | struct nfs4_client *clp; | |
1072 | ||
35bba9a3 BF |
1073 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1074 | if (clp == NULL) | |
1075 | return NULL; | |
67114fe6 | 1076 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1077 | if (clp->cl_name.data == NULL) { |
1078 | kfree(clp); | |
1079 | return NULL; | |
1da177e4 | 1080 | } |
35bba9a3 | 1081 | clp->cl_name.len = name.len; |
1da177e4 LT |
1082 | return clp; |
1083 | } | |
1084 | ||
1085 | static inline void | |
1086 | free_client(struct nfs4_client *clp) | |
1087 | { | |
bc2df47a | 1088 | lockdep_assert_held(&client_lock); |
792c95dd BF |
1089 | while (!list_empty(&clp->cl_sessions)) { |
1090 | struct nfsd4_session *ses; | |
1091 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1092 | se_perclnt); | |
1093 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1094 | nfsd4_put_session_locked(ses); |
792c95dd | 1095 | } |
03a4e1f6 | 1096 | free_svc_cred(&clp->cl_cred); |
1da177e4 LT |
1097 | kfree(clp->cl_name.data); |
1098 | kfree(clp); | |
1099 | } | |
1100 | ||
d7682988 BH |
1101 | void |
1102 | release_session_client(struct nfsd4_session *session) | |
1103 | { | |
1104 | struct nfs4_client *clp = session->se_client; | |
1105 | ||
1106 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1107 | return; | |
1108 | if (is_client_expired(clp)) { | |
1109 | free_client(clp); | |
1110 | session->se_client = NULL; | |
1111 | } else | |
1112 | renew_client_locked(clp); | |
1113 | spin_unlock(&client_lock); | |
d7682988 BH |
1114 | } |
1115 | ||
84d38ac9 BH |
1116 | /* must be called under the client_lock */ |
1117 | static inline void | |
1118 | unhash_client_locked(struct nfs4_client *clp) | |
1119 | { | |
792c95dd BF |
1120 | struct nfsd4_session *ses; |
1121 | ||
07cd4909 | 1122 | mark_client_expired(clp); |
84d38ac9 | 1123 | list_del(&clp->cl_lru); |
4c649378 | 1124 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1125 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1126 | list_del_init(&ses->se_hash); | |
4c649378 | 1127 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1128 | } |
1129 | ||
1da177e4 LT |
1130 | static void |
1131 | expire_client(struct nfs4_client *clp) | |
1132 | { | |
fe0750e5 | 1133 | struct nfs4_openowner *oo; |
1da177e4 | 1134 | struct nfs4_delegation *dp; |
1da177e4 LT |
1135 | struct list_head reaplist; |
1136 | ||
1da177e4 LT |
1137 | INIT_LIST_HEAD(&reaplist); |
1138 | spin_lock(&recall_lock); | |
ea1da636 N |
1139 | while (!list_empty(&clp->cl_delegations)) { |
1140 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1141 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1142 | list_move(&dp->dl_recall_lru, &reaplist); |
1143 | } | |
1144 | spin_unlock(&recall_lock); | |
1145 | while (!list_empty(&reaplist)) { | |
1146 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1147 | unhash_delegation(dp); |
1148 | } | |
ea1da636 | 1149 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1150 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1151 | release_openowner(oo); | |
1da177e4 | 1152 | } |
6ff8da08 | 1153 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1154 | if (clp->cl_cb_conn.cb_xprt) |
1155 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1156 | list_del(&clp->cl_idhash); |
1157 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1158 | spin_lock(&client_lock); |
84d38ac9 | 1159 | unhash_client_locked(clp); |
46583e25 BH |
1160 | if (atomic_read(&clp->cl_refcount) == 0) |
1161 | free_client(clp); | |
be1fdf6c | 1162 | spin_unlock(&client_lock); |
1da177e4 LT |
1163 | } |
1164 | ||
35bba9a3 BF |
1165 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1166 | { | |
1167 | memcpy(target->cl_verifier.data, source->data, | |
1168 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1169 | } |
1170 | ||
35bba9a3 BF |
1171 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1172 | { | |
1da177e4 LT |
1173 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1174 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1175 | } | |
1176 | ||
03a4e1f6 | 1177 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
35bba9a3 | 1178 | { |
03a4e1f6 BF |
1179 | if (source->cr_principal) { |
1180 | target->cr_principal = | |
1181 | kstrdup(source->cr_principal, GFP_KERNEL); | |
1182 | if (target->cr_principal == NULL) | |
1183 | return -ENOMEM; | |
1184 | } else | |
1185 | target->cr_principal = NULL; | |
d5497fc6 | 1186 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
1187 | target->cr_uid = source->cr_uid; |
1188 | target->cr_gid = source->cr_gid; | |
1189 | target->cr_group_info = source->cr_group_info; | |
1190 | get_group_info(target->cr_group_info); | |
03a4e1f6 | 1191 | return 0; |
1da177e4 LT |
1192 | } |
1193 | ||
35bba9a3 | 1194 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1195 | { |
a55370a3 | 1196 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | static int | |
599e0a22 BF |
1200 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1201 | { | |
1202 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | static int | |
599e0a22 BF |
1206 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1207 | { | |
1208 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1209 | } |
1210 | ||
8fbba96e BF |
1211 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
1212 | { | |
1213 | int i; | |
1214 | ||
1215 | if (g1->ngroups != g2->ngroups) | |
1216 | return false; | |
1217 | for (i=0; i<g1->ngroups; i++) | |
1218 | if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) | |
1219 | return false; | |
1220 | return true; | |
1221 | } | |
1222 | ||
1da177e4 | 1223 | static int |
599e0a22 BF |
1224 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1225 | { | |
d5497fc6 BF |
1226 | if ((cr1->cr_flavor != cr2->cr_flavor) |
1227 | || (cr1->cr_uid != cr2->cr_uid) | |
8fbba96e BF |
1228 | || (cr1->cr_gid != cr2->cr_gid) |
1229 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) | |
1230 | return false; | |
1231 | if (cr1->cr_principal == cr2->cr_principal) | |
1232 | return true; | |
1233 | if (!cr1->cr_principal || !cr2->cr_principal) | |
1234 | return false; | |
1235 | return 0 == strcmp(cr1->cr_principal, cr1->cr_principal); | |
1da177e4 LT |
1236 | } |
1237 | ||
5ec7b46c BF |
1238 | static void gen_clid(struct nfs4_client *clp) |
1239 | { | |
1240 | static u32 current_clientid = 1; | |
1241 | ||
1da177e4 LT |
1242 | clp->cl_clientid.cl_boot = boot_time; |
1243 | clp->cl_clientid.cl_id = current_clientid++; | |
1244 | } | |
1245 | ||
deda2faa BF |
1246 | static void gen_confirm(struct nfs4_client *clp) |
1247 | { | |
ab4684d1 | 1248 | __be32 verf[2]; |
deda2faa | 1249 | static u32 i; |
1da177e4 | 1250 | |
ab4684d1 CL |
1251 | verf[0] = (__be32)get_seconds(); |
1252 | verf[1] = (__be32)i++; | |
1253 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1254 | } |
1255 | ||
38c2f4b1 | 1256 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1257 | { |
38c2f4b1 | 1258 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1259 | } |
1260 | ||
38c2f4b1 | 1261 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1262 | { |
1263 | struct nfs4_stid *s; | |
4d71ab87 | 1264 | |
38c2f4b1 | 1265 | s = find_stateid(cl, t); |
4d71ab87 BF |
1266 | if (!s) |
1267 | return NULL; | |
f459e453 | 1268 | if (typemask & s->sc_type) |
4581d140 | 1269 | return s; |
4581d140 BF |
1270 | return NULL; |
1271 | } | |
1272 | ||
b09333c4 RL |
1273 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1274 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1275 | { | |
1276 | struct nfs4_client *clp; | |
1277 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 1278 | int ret; |
b09333c4 RL |
1279 | |
1280 | clp = alloc_client(name); | |
1281 | if (clp == NULL) | |
1282 | return NULL; | |
1283 | ||
792c95dd | 1284 | INIT_LIST_HEAD(&clp->cl_sessions); |
03a4e1f6 BF |
1285 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
1286 | if (ret) { | |
1287 | spin_lock(&client_lock); | |
1288 | free_client(clp); | |
1289 | spin_unlock(&client_lock); | |
1290 | return NULL; | |
b09333c4 | 1291 | } |
38c2f4b1 | 1292 | idr_init(&clp->cl_stateids); |
b09333c4 | 1293 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1294 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1295 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1296 | INIT_LIST_HEAD(&clp->cl_idhash); |
1297 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1298 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1299 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1300 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1301 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1302 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1303 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1304 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1305 | clear_bit(0, &clp->cl_cb_slot_busy); |
1306 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1307 | copy_verf(clp, verf); | |
1308 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
b09333c4 | 1309 | gen_confirm(clp); |
edd76786 | 1310 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1311 | return clp; |
1312 | } | |
1313 | ||
fd39ca9a | 1314 | static void |
1da177e4 LT |
1315 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1316 | { | |
1317 | unsigned int idhashval; | |
1318 | ||
1319 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1320 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1321 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1322 | renew_client(clp); |
1da177e4 LT |
1323 | } |
1324 | ||
fd39ca9a | 1325 | static void |
1da177e4 LT |
1326 | move_to_confirmed(struct nfs4_client *clp) |
1327 | { | |
1328 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1329 | unsigned int strhashval; | |
1330 | ||
1331 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1332 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1333 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1334 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1335 | renew_client(clp); |
1336 | } | |
1337 | ||
1338 | static struct nfs4_client * | |
1339 | find_confirmed_client(clientid_t *clid) | |
1340 | { | |
1341 | struct nfs4_client *clp; | |
1342 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1343 | ||
1344 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1345 | if (same_clid(&clp->cl_clientid, clid)) { |
1346 | renew_client(clp); | |
1da177e4 | 1347 | return clp; |
a50d2ad1 | 1348 | } |
1da177e4 LT |
1349 | } |
1350 | return NULL; | |
1351 | } | |
1352 | ||
1353 | static struct nfs4_client * | |
1354 | find_unconfirmed_client(clientid_t *clid) | |
1355 | { | |
1356 | struct nfs4_client *clp; | |
1357 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1358 | ||
1359 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1360 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1361 | return clp; |
1362 | } | |
1363 | return NULL; | |
1364 | } | |
1365 | ||
6e5f15c9 | 1366 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1367 | { |
6e5f15c9 | 1368 | return clp->cl_exchange_flags != 0; |
e203d506 | 1369 | } |
a1bcecd2 | 1370 | |
28ce6054 | 1371 | static struct nfs4_client * |
e203d506 | 1372 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1373 | { |
1374 | struct nfs4_client *clp; | |
1375 | ||
1376 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1377 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1378 | return clp; |
1379 | } | |
1380 | return NULL; | |
1381 | } | |
1382 | ||
1383 | static struct nfs4_client * | |
e203d506 | 1384 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1385 | { |
1386 | struct nfs4_client *clp; | |
1387 | ||
1388 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1389 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1390 | return clp; |
1391 | } | |
1392 | return NULL; | |
1393 | } | |
1394 | ||
fd39ca9a | 1395 | static void |
6f3d772f | 1396 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1397 | { |
07263f1e | 1398 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1399 | struct sockaddr *sa = svc_addr(rqstp); |
1400 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1401 | unsigned short expected_family; |
1402 | ||
1403 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1404 | if (se->se_callback_netid_len == 3 && | |
1405 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1406 | expected_family = AF_INET; | |
1407 | else if (se->se_callback_netid_len == 4 && | |
1408 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1409 | expected_family = AF_INET6; | |
1410 | else | |
1da177e4 LT |
1411 | goto out_err; |
1412 | ||
f2ac4dc9 | 1413 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1414 | se->se_callback_addr_len, |
07263f1e BF |
1415 | (struct sockaddr *)&conn->cb_addr, |
1416 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1417 | |
07263f1e | 1418 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1419 | goto out_err; |
aa9a4ec7 | 1420 | |
07263f1e BF |
1421 | if (conn->cb_addr.ss_family == AF_INET6) |
1422 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1423 | |
07263f1e BF |
1424 | conn->cb_prog = se->se_callback_prog; |
1425 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1426 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1427 | return; |
1428 | out_err: | |
07263f1e BF |
1429 | conn->cb_addr.ss_family = AF_UNSPEC; |
1430 | conn->cb_addrlen = 0; | |
849823c5 | 1431 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1432 | "will not receive delegations\n", |
1433 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1434 | ||
1da177e4 LT |
1435 | return; |
1436 | } | |
1437 | ||
074fe897 | 1438 | /* |
557ce264 | 1439 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1440 | */ |
074fe897 AA |
1441 | void |
1442 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1443 | { |
557ce264 AA |
1444 | struct nfsd4_slot *slot = resp->cstate.slot; |
1445 | unsigned int base; | |
074fe897 | 1446 | |
557ce264 | 1447 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1448 | |
557ce264 AA |
1449 | slot->sl_opcnt = resp->opcnt; |
1450 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1451 | |
bf5c43c8 | 1452 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1453 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1454 | slot->sl_datalen = 0; |
bf864a31 | 1455 | return; |
074fe897 | 1456 | } |
557ce264 AA |
1457 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1458 | base = (char *)resp->cstate.datap - | |
1459 | (char *)resp->xbuf->head[0].iov_base; | |
1460 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1461 | slot->sl_datalen)) | |
1462 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1463 | return; | |
074fe897 AA |
1464 | } |
1465 | ||
1466 | /* | |
abfabf8c AA |
1467 | * Encode the replay sequence operation from the slot values. |
1468 | * If cachethis is FALSE encode the uncached rep error on the next | |
1469 | * operation which sets resp->p and increments resp->opcnt for | |
1470 | * nfs4svc_encode_compoundres. | |
074fe897 | 1471 | * |
074fe897 | 1472 | */ |
abfabf8c AA |
1473 | static __be32 |
1474 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1475 | struct nfsd4_compoundres *resp) | |
074fe897 | 1476 | { |
abfabf8c AA |
1477 | struct nfsd4_op *op; |
1478 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1479 | |
abfabf8c AA |
1480 | /* Encode the replayed sequence operation */ |
1481 | op = &args->ops[resp->opcnt - 1]; | |
1482 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1483 | |
abfabf8c | 1484 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1485 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1486 | op = &args->ops[resp->opcnt++]; |
1487 | op->status = nfserr_retry_uncached_rep; | |
1488 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1489 | } |
abfabf8c | 1490 | return op->status; |
074fe897 AA |
1491 | } |
1492 | ||
1493 | /* | |
557ce264 AA |
1494 | * The sequence operation is not cached because we can use the slot and |
1495 | * session values. | |
074fe897 AA |
1496 | */ |
1497 | __be32 | |
bf864a31 AA |
1498 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1499 | struct nfsd4_sequence *seq) | |
074fe897 | 1500 | { |
557ce264 | 1501 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1502 | __be32 status; |
1503 | ||
557ce264 | 1504 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1505 | |
abfabf8c AA |
1506 | /* Either returns 0 or nfserr_retry_uncached */ |
1507 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1508 | if (status == nfserr_retry_uncached_rep) | |
1509 | return status; | |
074fe897 | 1510 | |
557ce264 AA |
1511 | /* The sequence operation has been encoded, cstate->datap set. */ |
1512 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1513 | |
557ce264 AA |
1514 | resp->opcnt = slot->sl_opcnt; |
1515 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1516 | status = slot->sl_status; | |
074fe897 AA |
1517 | |
1518 | return status; | |
1519 | } | |
1520 | ||
0733d213 AA |
1521 | /* |
1522 | * Set the exchange_id flags returned by the server. | |
1523 | */ | |
1524 | static void | |
1525 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1526 | { | |
1527 | /* pNFS is not supported */ | |
1528 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1529 | ||
1530 | /* Referrals are supported, Migration is not. */ | |
1531 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1532 | ||
1533 | /* set the wire flags to return to client. */ | |
1534 | clid->flags = new->cl_exchange_flags; | |
1535 | } | |
1536 | ||
631fc9ea BF |
1537 | static bool client_has_state(struct nfs4_client *clp) |
1538 | { | |
1539 | /* | |
1540 | * Note clp->cl_openowners check isn't quite right: there's no | |
1541 | * need to count owners without stateid's. | |
1542 | * | |
1543 | * Also note we should probably be using this in 4.0 case too. | |
1544 | */ | |
6eccece9 BF |
1545 | return !list_empty(&clp->cl_openowners) |
1546 | || !list_empty(&clp->cl_delegations) | |
1547 | || !list_empty(&clp->cl_sessions); | |
631fc9ea BF |
1548 | } |
1549 | ||
069b6ad4 AA |
1550 | __be32 |
1551 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1552 | struct nfsd4_compound_state *cstate, | |
1553 | struct nfsd4_exchange_id *exid) | |
1554 | { | |
0733d213 | 1555 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1556 | __be32 status; |
0733d213 AA |
1557 | unsigned int strhashval; |
1558 | char dname[HEXDIR_LEN]; | |
363168b4 | 1559 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1560 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1561 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 1562 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
0733d213 | 1563 | |
363168b4 | 1564 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1565 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1566 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1567 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1568 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1569 | |
a084daf5 | 1570 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1571 | return nfserr_inval; |
1572 | ||
1573 | /* Currently only support SP4_NONE */ | |
1574 | switch (exid->spa_how) { | |
1575 | case SP4_NONE: | |
1576 | break; | |
1577 | case SP4_SSV: | |
044bc1d4 | 1578 | return nfserr_serverfault; |
0733d213 AA |
1579 | default: |
1580 | BUG(); /* checked by xdr code */ | |
1581 | case SP4_MACH_CRED: | |
1582 | return nfserr_serverfault; /* no excuse :-/ */ | |
1583 | } | |
1584 | ||
1585 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1586 | ||
1587 | if (status) | |
2786cc3a | 1588 | return status; |
0733d213 AA |
1589 | |
1590 | strhashval = clientstr_hashval(dname); | |
1591 | ||
2dbb269d | 1592 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
0733d213 | 1593 | nfs4_lock_state(); |
e203d506 | 1594 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1595 | if (conf) { |
83e08fd4 BF |
1596 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
1597 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
1598 | ||
136e658d BF |
1599 | if (update) { |
1600 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 1601 | status = nfserr_inval; |
1a308118 BF |
1602 | goto out; |
1603 | } | |
136e658d | 1604 | if (!creds_match) { /* case 9 */ |
ea236d07 | 1605 | status = nfserr_perm; |
136e658d BF |
1606 | goto out; |
1607 | } | |
1608 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
1609 | status = nfserr_not_same; |
1610 | goto out; | |
1611 | } | |
136e658d BF |
1612 | /* case 6 */ |
1613 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1614 | new = conf; | |
1615 | goto out_copy; | |
0733d213 | 1616 | } |
136e658d | 1617 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
1618 | if (client_has_state(conf)) { |
1619 | status = nfserr_clid_inuse; | |
0733d213 AA |
1620 | goto out; |
1621 | } | |
1622 | expire_client(conf); | |
1623 | goto out_new; | |
1624 | } | |
136e658d | 1625 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 1626 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
1627 | new = conf; |
1628 | goto out_copy; | |
1629 | } | |
1630 | /* case 5, client reboot */ | |
136e658d | 1631 | goto out_new; |
6ddbbbfe MS |
1632 | } |
1633 | ||
2dbb269d | 1634 | if (update) { /* case 7 */ |
6ddbbbfe MS |
1635 | status = nfserr_noent; |
1636 | goto out; | |
0733d213 AA |
1637 | } |
1638 | ||
e203d506 | 1639 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
2dbb269d | 1640 | if (unconf) /* case 4, possible retry or client restart */ |
0733d213 | 1641 | expire_client(unconf); |
0733d213 | 1642 | |
2dbb269d | 1643 | /* case 1 (normal case) */ |
0733d213 | 1644 | out_new: |
b09333c4 | 1645 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1646 | if (new == NULL) { |
4731030d | 1647 | status = nfserr_jukebox; |
0733d213 AA |
1648 | goto out; |
1649 | } | |
1650 | ||
0733d213 | 1651 | gen_clid(new); |
0733d213 AA |
1652 | add_to_unconfirmed(new, strhashval); |
1653 | out_copy: | |
1654 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1655 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1656 | ||
778df3f0 | 1657 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
0733d213 AA |
1658 | nfsd4_set_ex_flags(new, exid); |
1659 | ||
1660 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1661 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1662 | status = nfs_ok; |
1663 | ||
1664 | out: | |
1665 | nfs4_unlock_state(); | |
0733d213 | 1666 | return status; |
069b6ad4 AA |
1667 | } |
1668 | ||
57b7b43b | 1669 | static __be32 |
88e588d5 | 1670 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1671 | { |
88e588d5 AA |
1672 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1673 | slot_seqid); | |
b85d4c01 BH |
1674 | |
1675 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1676 | if (slot_inuse) { |
1677 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1678 | return nfserr_jukebox; |
1679 | else | |
1680 | return nfserr_seq_misordered; | |
1681 | } | |
f6d82485 | 1682 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1683 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1684 | return nfs_ok; |
88e588d5 | 1685 | if (seqid == slot_seqid) |
b85d4c01 | 1686 | return nfserr_replay_cache; |
b85d4c01 BH |
1687 | return nfserr_seq_misordered; |
1688 | } | |
1689 | ||
49557cc7 AA |
1690 | /* |
1691 | * Cache the create session result into the create session single DRC | |
1692 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1693 | * Do this for solo or embedded create session operations. | |
1694 | */ | |
1695 | static void | |
1696 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1697 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1698 | { |
1699 | slot->sl_status = nfserr; | |
1700 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1701 | } | |
1702 | ||
1703 | static __be32 | |
1704 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1705 | struct nfsd4_clid_slot *slot) | |
1706 | { | |
1707 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1708 | return slot->sl_status; | |
1709 | } | |
1710 | ||
1b74c25b MJ |
1711 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1712 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1713 | 1 + /* MIN tag is length with zero, only length */ \ | |
1714 | 3 + /* version, opcount, opcode */ \ | |
1715 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1716 | /* seqid, slotID, slotID, cache */ \ | |
1717 | 4 ) * sizeof(__be32)) | |
1718 | ||
1719 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1720 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1721 | 1 + /* status */ \ | |
1722 | 1 + /* MIN tag is length with zero, only length */ \ | |
1723 | 3 + /* opcount, opcode, opstatus*/ \ | |
1724 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1725 | /* seqid, slotID, slotID, slotID, status */ \ | |
1726 | 5 ) * sizeof(__be32)) | |
1727 | ||
57b7b43b | 1728 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1729 | { |
1730 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1731 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1732 | } | |
1733 | ||
069b6ad4 AA |
1734 | __be32 |
1735 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1736 | struct nfsd4_compound_state *cstate, | |
1737 | struct nfsd4_create_session *cr_ses) | |
1738 | { | |
363168b4 | 1739 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1740 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1741 | struct nfsd4_session *new; |
49557cc7 | 1742 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1743 | bool confirm_me = false; |
57b7b43b | 1744 | __be32 status = 0; |
ec6b5d7b | 1745 | |
a62573dc MJ |
1746 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1747 | return nfserr_inval; | |
1748 | ||
ec6b5d7b AA |
1749 | nfs4_lock_state(); |
1750 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1751 | conf = find_confirmed_client(&cr_ses->clientid); | |
1752 | ||
1753 | if (conf) { | |
49557cc7 AA |
1754 | cs_slot = &conf->cl_cs_slot; |
1755 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1756 | if (status == nfserr_replay_cache) { |
49557cc7 | 1757 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1758 | goto out; |
49557cc7 | 1759 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b | 1760 | status = nfserr_seq_misordered; |
ec6b5d7b AA |
1761 | goto out; |
1762 | } | |
ec6b5d7b AA |
1763 | } else if (unconf) { |
1764 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1765 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1766 | status = nfserr_clid_inuse; |
1767 | goto out; | |
1768 | } | |
49557cc7 AA |
1769 | cs_slot = &unconf->cl_cs_slot; |
1770 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1771 | if (status) { |
1772 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1773 | status = nfserr_seq_misordered; |
cd5b8144 | 1774 | goto out; |
ec6b5d7b | 1775 | } |
86c3e16c | 1776 | confirm_me = true; |
ec6b5d7b AA |
1777 | conf = unconf; |
1778 | } else { | |
1779 | status = nfserr_stale_clientid; | |
1780 | goto out; | |
1781 | } | |
1782 | ||
8323c3b2 BF |
1783 | /* |
1784 | * XXX: we should probably set this at creation time, and check | |
1785 | * for consistent minorversion use throughout: | |
1786 | */ | |
1787 | conf->cl_minorversion = 1; | |
408b79bc BF |
1788 | /* |
1789 | * We do not support RDMA or persistent sessions | |
1790 | */ | |
1791 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1792 | cr_ses->flags &= ~SESSION4_RDMA; | |
1793 | ||
1b74c25b MJ |
1794 | status = nfserr_toosmall; |
1795 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1796 | goto out; | |
1797 | ||
ac7c46f2 BF |
1798 | status = nfserr_jukebox; |
1799 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1800 | if (!new) | |
ec6b5d7b | 1801 | goto out; |
ac7c46f2 BF |
1802 | status = nfs_ok; |
1803 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1804 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1805 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1806 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1807 | cs_slot->sl_seqid++; |
49557cc7 | 1808 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1809 | |
49557cc7 AA |
1810 | /* cache solo and embedded create sessions under the state lock */ |
1811 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
b9831b59 BF |
1812 | if (confirm_me) { |
1813 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); | |
1814 | struct nfs4_client *old = | |
1815 | find_confirmed_client_by_str(conf->cl_recdir, hash); | |
1816 | if (old) | |
1817 | expire_client(old); | |
86c3e16c | 1818 | move_to_confirmed(conf); |
b9831b59 | 1819 | } |
ec6b5d7b AA |
1820 | out: |
1821 | nfs4_unlock_state(); | |
1822 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1823 | return status; | |
069b6ad4 AA |
1824 | } |
1825 | ||
57716355 BF |
1826 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1827 | { | |
1828 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1829 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1830 | ||
1831 | return argp->opcnt == resp->opcnt; | |
1832 | } | |
1833 | ||
1d1bc8f2 BF |
1834 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1835 | { | |
1836 | switch (*dir) { | |
1837 | case NFS4_CDFC4_FORE: | |
1838 | case NFS4_CDFC4_BACK: | |
1839 | return nfs_ok; | |
1840 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1841 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1842 | *dir = NFS4_CDFC4_BOTH; | |
1843 | return nfs_ok; | |
1844 | }; | |
1845 | return nfserr_inval; | |
1846 | } | |
1847 | ||
1848 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1849 | struct nfsd4_compound_state *cstate, | |
1850 | struct nfsd4_bind_conn_to_session *bcts) | |
1851 | { | |
1852 | __be32 status; | |
1853 | ||
1854 | if (!nfsd4_last_compound_op(rqstp)) | |
1855 | return nfserr_not_only_op; | |
1856 | spin_lock(&client_lock); | |
1857 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1858 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1859 | * client_lock iself: */ | |
1860 | if (cstate->session) { | |
1861 | nfsd4_get_session(cstate->session); | |
1862 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1863 | } | |
1864 | spin_unlock(&client_lock); | |
1865 | if (!cstate->session) | |
1866 | return nfserr_badsession; | |
1867 | ||
1868 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1869 | if (!status) |
1870 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1871 | return status; | |
1d1bc8f2 BF |
1872 | } |
1873 | ||
5d4cec2f BF |
1874 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1875 | { | |
1876 | if (!session) | |
1877 | return 0; | |
1878 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1879 | } | |
1880 | ||
069b6ad4 AA |
1881 | __be32 |
1882 | nfsd4_destroy_session(struct svc_rqst *r, | |
1883 | struct nfsd4_compound_state *cstate, | |
1884 | struct nfsd4_destroy_session *sessionid) | |
1885 | { | |
e10e0cfc | 1886 | struct nfsd4_session *ses; |
57b7b43b | 1887 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1888 | |
1889 | /* Notes: | |
1890 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1891 | * - Should we return nfserr_back_chan_busy if waiting for | |
1892 | * callbacks on to-be-destroyed session? | |
1893 | * - Do we need to clear any callback info from previous session? | |
1894 | */ | |
1895 | ||
5d4cec2f | 1896 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1897 | if (!nfsd4_last_compound_op(r)) |
1898 | return nfserr_not_only_op; | |
1899 | } | |
e10e0cfc | 1900 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1901 | spin_lock(&client_lock); |
e10e0cfc BH |
1902 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1903 | if (!ses) { | |
9089f1b4 | 1904 | spin_unlock(&client_lock); |
e10e0cfc BH |
1905 | goto out; |
1906 | } | |
1907 | ||
1908 | unhash_session(ses); | |
9089f1b4 | 1909 | spin_unlock(&client_lock); |
e10e0cfc | 1910 | |
ab707e15 | 1911 | nfs4_lock_state(); |
84f5f7cc | 1912 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1913 | nfs4_unlock_state(); |
19cf5c02 | 1914 | |
508dc6e1 | 1915 | spin_lock(&client_lock); |
19cf5c02 | 1916 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1917 | nfsd4_put_session_locked(ses); |
1918 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1919 | status = nfs_ok; |
1920 | out: | |
1921 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1922 | return status; | |
069b6ad4 AA |
1923 | } |
1924 | ||
a663bdd8 | 1925 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1926 | { |
1927 | struct nfsd4_conn *c; | |
1928 | ||
1929 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1930 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1931 | return c; |
1932 | } | |
1933 | } | |
1934 | return NULL; | |
1935 | } | |
1936 | ||
a663bdd8 | 1937 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1938 | { |
1939 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1940 | struct nfsd4_conn *c; |
21b75b01 | 1941 | int ret; |
328ead28 BF |
1942 | |
1943 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1944 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1945 | if (c) { |
1946 | spin_unlock(&clp->cl_lock); | |
1947 | free_conn(new); | |
1948 | return; | |
1949 | } | |
1950 | __nfsd4_hash_conn(new, ses); | |
1951 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1952 | ret = nfsd4_register_conn(new); |
1953 | if (ret) | |
1954 | /* oops; xprt is already down: */ | |
1955 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1956 | return; |
1957 | } | |
1958 | ||
868b89c3 MJ |
1959 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1960 | { | |
1961 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1962 | ||
1963 | return args->opcnt > session->se_fchannel.maxops; | |
1964 | } | |
1965 | ||
ae82a8d0 MJ |
1966 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1967 | struct nfsd4_session *session) | |
1968 | { | |
1969 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1970 | ||
1971 | return xb->len > session->se_fchannel.maxreq_sz; | |
1972 | } | |
1973 | ||
069b6ad4 | 1974 | __be32 |
b85d4c01 | 1975 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1976 | struct nfsd4_compound_state *cstate, |
1977 | struct nfsd4_sequence *seq) | |
1978 | { | |
f9bb94c4 | 1979 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1980 | struct nfsd4_session *session; |
1981 | struct nfsd4_slot *slot; | |
a663bdd8 | 1982 | struct nfsd4_conn *conn; |
57b7b43b | 1983 | __be32 status; |
b85d4c01 | 1984 | |
f9bb94c4 AA |
1985 | if (resp->opcnt != 1) |
1986 | return nfserr_sequence_pos; | |
1987 | ||
a663bdd8 BF |
1988 | /* |
1989 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1990 | * below. | |
1991 | */ | |
1992 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1993 | if (!conn) | |
1994 | return nfserr_jukebox; | |
1995 | ||
9089f1b4 | 1996 | spin_lock(&client_lock); |
b85d4c01 BH |
1997 | status = nfserr_badsession; |
1998 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1999 | if (!session) | |
2000 | goto out; | |
2001 | ||
868b89c3 MJ |
2002 | status = nfserr_too_many_ops; |
2003 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
2004 | goto out; | |
2005 | ||
ae82a8d0 MJ |
2006 | status = nfserr_req_too_big; |
2007 | if (nfsd4_request_too_big(rqstp, session)) | |
2008 | goto out; | |
2009 | ||
b85d4c01 | 2010 | status = nfserr_badslot; |
6c18ba9f | 2011 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
2012 | goto out; |
2013 | ||
557ce264 | 2014 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
2015 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
2016 | ||
a8dfdaeb AA |
2017 | /* We do not negotiate the number of slots yet, so set the |
2018 | * maxslots to the session maxreqs which is used to encode | |
2019 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
2020 | seq->maxslots = session->se_fchannel.maxreqs; | |
2021 | ||
73e79482 BF |
2022 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
2023 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 2024 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
2025 | status = nfserr_seq_misordered; |
2026 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
2027 | goto out; | |
b85d4c01 BH |
2028 | cstate->slot = slot; |
2029 | cstate->session = session; | |
da3846a2 | 2030 | /* Return the cached reply status and set cstate->status |
557ce264 | 2031 | * for nfsd4_proc_compound processing */ |
bf864a31 | 2032 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 2033 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2034 | goto out; |
b85d4c01 BH |
2035 | } |
2036 | if (status) | |
2037 | goto out; | |
2038 | ||
a663bdd8 BF |
2039 | nfsd4_sequence_check_conn(conn, session); |
2040 | conn = NULL; | |
328ead28 | 2041 | |
b85d4c01 | 2042 | /* Success! bump slot seqid */ |
b85d4c01 | 2043 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2044 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2045 | if (seq->cachethis) |
2046 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2047 | else |
2048 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2049 | |
2050 | cstate->slot = slot; | |
2051 | cstate->session = session; | |
2052 | ||
b85d4c01 | 2053 | out: |
26c0c75e | 2054 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2055 | if (cstate->session) { |
0d7bb719 BF |
2056 | struct nfs4_client *clp = session->se_client; |
2057 | ||
36acb66b | 2058 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2059 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2060 | switch (clp->cl_cb_state) { |
2061 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2062 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2063 | break; |
2064 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2065 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2066 | break; |
fc0c3dd1 BH |
2067 | default: |
2068 | seq->status_flags = 0; | |
5423732a | 2069 | } |
aaf84eb9 | 2070 | } |
a663bdd8 | 2071 | kfree(conn); |
36acb66b | 2072 | spin_unlock(&client_lock); |
b85d4c01 BH |
2073 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2074 | return status; | |
069b6ad4 AA |
2075 | } |
2076 | ||
345c2842 MJ |
2077 | __be32 |
2078 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2079 | { | |
2080 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2081 | __be32 status = 0; |
345c2842 MJ |
2082 | |
2083 | nfs4_lock_state(); | |
2084 | unconf = find_unconfirmed_client(&dc->clientid); | |
2085 | conf = find_confirmed_client(&dc->clientid); | |
2086 | ||
2087 | if (conf) { | |
2088 | clp = conf; | |
2089 | ||
6eccece9 | 2090 | if (!is_client_expired(conf) && client_has_state(conf)) { |
345c2842 MJ |
2091 | status = nfserr_clientid_busy; |
2092 | goto out; | |
2093 | } | |
2094 | ||
2095 | /* rfc5661 18.50.3 */ | |
2096 | if (cstate->session && conf == cstate->session->se_client) { | |
2097 | status = nfserr_clientid_busy; | |
2098 | goto out; | |
2099 | } | |
2100 | } else if (unconf) | |
2101 | clp = unconf; | |
2102 | else { | |
2103 | status = nfserr_stale_clientid; | |
2104 | goto out; | |
2105 | } | |
2106 | ||
2107 | expire_client(clp); | |
2108 | out: | |
2109 | nfs4_unlock_state(); | |
2110 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2111 | return status; | |
2112 | } | |
2113 | ||
4dc6ec00 BF |
2114 | __be32 |
2115 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2116 | { | |
57b7b43b | 2117 | __be32 status = 0; |
bcecf1cc | 2118 | |
4dc6ec00 BF |
2119 | if (rc->rca_one_fs) { |
2120 | if (!cstate->current_fh.fh_dentry) | |
2121 | return nfserr_nofilehandle; | |
2122 | /* | |
2123 | * We don't take advantage of the rca_one_fs case. | |
2124 | * That's OK, it's optional, we can safely ignore it. | |
2125 | */ | |
2126 | return nfs_ok; | |
2127 | } | |
bcecf1cc | 2128 | |
4dc6ec00 | 2129 | nfs4_lock_state(); |
bcecf1cc | 2130 | status = nfserr_complete_already; |
a52d726b JL |
2131 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2132 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2133 | goto out; |
2134 | ||
2135 | status = nfserr_stale_clientid; | |
2136 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2137 | /* |
2138 | * The following error isn't really legal. | |
2139 | * But we only get here if the client just explicitly | |
2140 | * destroyed the client. Surely it no longer cares what | |
2141 | * error it gets back on an operation for the dead | |
2142 | * client. | |
2143 | */ | |
bcecf1cc MJ |
2144 | goto out; |
2145 | ||
2146 | status = nfs_ok; | |
2a4317c5 | 2147 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2148 | out: |
4dc6ec00 | 2149 | nfs4_unlock_state(); |
bcecf1cc | 2150 | return status; |
4dc6ec00 BF |
2151 | } |
2152 | ||
b37ad28b | 2153 | __be32 |
b591480b BF |
2154 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2155 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2156 | { |
a084daf5 | 2157 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2158 | nfs4_verifier clverifier = setclid->se_verf; |
2159 | unsigned int strhashval; | |
28ce6054 | 2160 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2161 | __be32 status; |
a55370a3 | 2162 | char dname[HEXDIR_LEN]; |
1da177e4 | 2163 | |
a55370a3 N |
2164 | status = nfs4_make_rec_clidname(dname, &clname); |
2165 | if (status) | |
73aea4ec | 2166 | return status; |
a55370a3 | 2167 | |
a55370a3 | 2168 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2169 | |
63db4632 | 2170 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
1da177e4 | 2171 | nfs4_lock_state(); |
e203d506 | 2172 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2173 | if (conf) { |
63db4632 | 2174 | /* case 0: */ |
1da177e4 | 2175 | status = nfserr_clid_inuse; |
e203d506 BF |
2176 | if (clp_used_exchangeid(conf)) |
2177 | goto out; | |
026722c2 | 2178 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2179 | char addr_str[INET6_ADDRSTRLEN]; |
2180 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2181 | sizeof(addr_str)); | |
2182 | dprintk("NFSD: setclientid: string in use by client " | |
2183 | "at %s\n", addr_str); | |
1da177e4 LT |
2184 | goto out; |
2185 | } | |
1da177e4 | 2186 | } |
e203d506 | 2187 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
8f930711 BF |
2188 | if (unconf) |
2189 | expire_client(unconf); | |
3e772463 | 2190 | status = nfserr_jukebox; |
8f930711 BF |
2191 | new = create_client(clname, dname, rqstp, &clverifier); |
2192 | if (new == NULL) | |
2193 | goto out; | |
34b232bb | 2194 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
63db4632 | 2195 | /* case 1: probable callback update */ |
1da177e4 | 2196 | copy_clid(new, conf); |
34b232bb | 2197 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
1da177e4 | 2198 | gen_clid(new); |
8323c3b2 BF |
2199 | /* |
2200 | * XXX: we should probably set this at creation time, and check | |
2201 | * for consistent minorversion use throughout: | |
2202 | */ | |
2203 | new->cl_minorversion = 0; | |
6f3d772f | 2204 | gen_callback(new, setclid, rqstp); |
c175b83c | 2205 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2206 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2207 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2208 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2209 | status = nfs_ok; | |
2210 | out: | |
2211 | nfs4_unlock_state(); | |
2212 | return status; | |
2213 | } | |
2214 | ||
2215 | ||
b37ad28b | 2216 | __be32 |
b591480b BF |
2217 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2218 | struct nfsd4_compound_state *cstate, | |
2219 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2220 | { |
21ab45a4 | 2221 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2222 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2223 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2224 | __be32 status; |
1da177e4 LT |
2225 | |
2226 | if (STALE_CLIENTID(clid)) | |
2227 | return nfserr_stale_clientid; | |
1da177e4 | 2228 | nfs4_lock_state(); |
21ab45a4 N |
2229 | |
2230 | conf = find_confirmed_client(clid); | |
2231 | unconf = find_unconfirmed_client(clid); | |
a186e767 | 2232 | /* |
8695b90a BF |
2233 | * We try hard to give out unique clientid's, so if we get an |
2234 | * attempt to confirm the same clientid with a different cred, | |
2235 | * there's a bug somewhere. Let's charitably assume it's our | |
2236 | * bug. | |
a186e767 | 2237 | */ |
8695b90a BF |
2238 | status = nfserr_serverfault; |
2239 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) | |
2240 | goto out; | |
2241 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
2242 | goto out; | |
63db4632 | 2243 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 BF |
2244 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
2245 | if (conf && !unconf) /* case 2: probable retransmit */ | |
1da177e4 | 2246 | status = nfs_ok; |
90d700b7 BF |
2247 | else /* case 4: client hasn't noticed we rebooted yet? */ |
2248 | status = nfserr_stale_clientid; | |
2249 | goto out; | |
2250 | } | |
2251 | status = nfs_ok; | |
2252 | if (conf) { /* case 1: callback update */ | |
8695b90a BF |
2253 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2254 | nfsd4_probe_callback(conf); | |
2255 | expire_client(unconf); | |
90d700b7 | 2256 | } else { /* case 3: normal case; new or rebooted client */ |
8695b90a | 2257 | unsigned int hash = clientstr_hashval(unconf->cl_recdir); |
1a69c179 | 2258 | |
8695b90a BF |
2259 | conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); |
2260 | if (conf) { | |
2261 | nfsd4_client_record_remove(conf); | |
2262 | expire_client(conf); | |
1da177e4 | 2263 | } |
8695b90a | 2264 | move_to_confirmed(unconf); |
f3d03b92 | 2265 | nfsd4_probe_callback(unconf); |
08e8987c | 2266 | } |
1da177e4 | 2267 | out: |
1da177e4 LT |
2268 | nfs4_unlock_state(); |
2269 | return status; | |
2270 | } | |
2271 | ||
32513b40 BF |
2272 | static struct nfs4_file *nfsd4_alloc_file(void) |
2273 | { | |
2274 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2275 | } | |
2276 | ||
1da177e4 | 2277 | /* OPEN Share state helper functions */ |
32513b40 | 2278 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2279 | { |
1da177e4 LT |
2280 | unsigned int hashval = file_hashval(ino); |
2281 | ||
32513b40 BF |
2282 | atomic_set(&fp->fi_ref, 1); |
2283 | INIT_LIST_HEAD(&fp->fi_hash); | |
2284 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2285 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2286 | fp->fi_inode = igrab(ino); | |
2287 | fp->fi_had_conflict = false; | |
2288 | fp->fi_lease = NULL; | |
2289 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2290 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2291 | spin_lock(&recall_lock); | |
2292 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2293 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2294 | } |
2295 | ||
e60d4398 | 2296 | static void |
e18b890b | 2297 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2298 | { |
e60d4398 N |
2299 | if (*slab == NULL) |
2300 | return; | |
1a1d92c1 | 2301 | kmem_cache_destroy(*slab); |
e60d4398 | 2302 | *slab = NULL; |
1da177e4 LT |
2303 | } |
2304 | ||
e8ff2a84 | 2305 | void |
1da177e4 LT |
2306 | nfsd4_free_slabs(void) |
2307 | { | |
fe0750e5 BF |
2308 | nfsd4_free_slab(&openowner_slab); |
2309 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2310 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2311 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2312 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2313 | } |
1da177e4 | 2314 | |
72083396 | 2315 | int |
e60d4398 N |
2316 | nfsd4_init_slabs(void) |
2317 | { | |
fe0750e5 BF |
2318 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2319 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2320 | if (openowner_slab == NULL) | |
2321 | goto out_nomem; | |
2322 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2323 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2324 | if (lockowner_slab == NULL) | |
e60d4398 N |
2325 | goto out_nomem; |
2326 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2327 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2328 | if (file_slab == NULL) |
2329 | goto out_nomem; | |
5ac049ac | 2330 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2331 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2332 | if (stateid_slab == NULL) |
2333 | goto out_nomem; | |
5b2d21c1 | 2334 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2335 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2336 | if (deleg_slab == NULL) |
2337 | goto out_nomem; | |
e60d4398 N |
2338 | return 0; |
2339 | out_nomem: | |
2340 | nfsd4_free_slabs(); | |
2341 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2342 | return -ENOMEM; | |
1da177e4 LT |
2343 | } |
2344 | ||
fe0750e5 BF |
2345 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2346 | { | |
2347 | kfree(oo->oo_owner.so_owner.data); | |
2348 | kmem_cache_free(openowner_slab, oo); | |
2349 | } | |
2350 | ||
2351 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2352 | { |
fe0750e5 BF |
2353 | kfree(lo->lo_owner.so_owner.data); |
2354 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2355 | } |
2356 | ||
ff194bd9 | 2357 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2358 | { |
ff194bd9 BF |
2359 | rp->rp_status = nfserr_serverfault; |
2360 | rp->rp_buflen = 0; | |
2361 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2362 | } |
2363 | ||
fe0750e5 | 2364 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2365 | { |
1da177e4 | 2366 | struct nfs4_stateowner *sop; |
1da177e4 | 2367 | |
fe0750e5 | 2368 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2369 | if (!sop) |
2370 | return NULL; | |
2371 | ||
2372 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2373 | if (!sop->so_owner.data) { | |
fe0750e5 | 2374 | kmem_cache_free(slab, sop); |
1da177e4 | 2375 | return NULL; |
ff194bd9 BF |
2376 | } |
2377 | sop->so_owner.len = owner->len; | |
2378 | ||
ea1da636 | 2379 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2380 | sop->so_client = clp; |
2381 | init_nfs4_replay(&sop->so_replay); | |
2382 | return sop; | |
2383 | } | |
2384 | ||
fe0750e5 | 2385 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2386 | { |
16bfdaaf | 2387 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2388 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2389 | } |
2390 | ||
fe0750e5 | 2391 | static struct nfs4_openowner * |
ff194bd9 | 2392 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2393 | struct nfs4_openowner *oo; |
ff194bd9 | 2394 | |
fe0750e5 BF |
2395 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2396 | if (!oo) | |
ff194bd9 | 2397 | return NULL; |
fe0750e5 BF |
2398 | oo->oo_owner.so_is_open_owner = 1; |
2399 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2400 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2401 | oo->oo_time = 0; |
38c387b5 | 2402 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2403 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2404 | hash_openowner(oo, clp, strhashval); | |
2405 | return oo; | |
1da177e4 LT |
2406 | } |
2407 | ||
996e0938 | 2408 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2409 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2410 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2411 | |
996e0938 | 2412 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2413 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2414 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2415 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2416 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2417 | get_nfs4_file(fp); |
1da177e4 | 2418 | stp->st_file = fp; |
1da177e4 LT |
2419 | stp->st_access_bmap = 0; |
2420 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2421 | set_access(open->op_share_access, stp); |
ce0fc43c | 2422 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2423 | stp->st_openstp = NULL; |
1da177e4 LT |
2424 | } |
2425 | ||
fd39ca9a | 2426 | static void |
fe0750e5 | 2427 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2428 | { |
fe0750e5 | 2429 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2430 | |
fe0750e5 BF |
2431 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2432 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2433 | } |
2434 | ||
1da177e4 | 2435 | static int |
599e0a22 BF |
2436 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2437 | clientid_t *clid) | |
2438 | { | |
2439 | return (sop->so_owner.len == owner->len) && | |
2440 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2441 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2442 | } |
2443 | ||
fe0750e5 | 2444 | static struct nfs4_openowner * |
1da177e4 LT |
2445 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2446 | { | |
a50d2ad1 BF |
2447 | struct nfs4_stateowner *so; |
2448 | struct nfs4_openowner *oo; | |
1da177e4 | 2449 | |
16bfdaaf BF |
2450 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2451 | if (!so->so_is_open_owner) | |
2452 | continue; | |
a50d2ad1 BF |
2453 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2454 | oo = openowner(so); | |
2455 | renew_client(oo->oo_owner.so_client); | |
2456 | return oo; | |
2457 | } | |
1da177e4 LT |
2458 | } |
2459 | return NULL; | |
2460 | } | |
2461 | ||
2462 | /* search file_hashtbl[] for file */ | |
2463 | static struct nfs4_file * | |
2464 | find_file(struct inode *ino) | |
2465 | { | |
2466 | unsigned int hashval = file_hashval(ino); | |
2467 | struct nfs4_file *fp; | |
2468 | ||
8b671b80 | 2469 | spin_lock(&recall_lock); |
1da177e4 | 2470 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2471 | if (fp->fi_inode == ino) { |
2472 | get_nfs4_file(fp); | |
8b671b80 | 2473 | spin_unlock(&recall_lock); |
1da177e4 | 2474 | return fp; |
13cd2184 | 2475 | } |
1da177e4 | 2476 | } |
8b671b80 | 2477 | spin_unlock(&recall_lock); |
1da177e4 LT |
2478 | return NULL; |
2479 | } | |
2480 | ||
1da177e4 LT |
2481 | /* |
2482 | * Called to check deny when READ with all zero stateid or | |
2483 | * WRITE with all zero or all one stateid | |
2484 | */ | |
b37ad28b | 2485 | static __be32 |
1da177e4 LT |
2486 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2487 | { | |
2488 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2489 | struct nfs4_file *fp; | |
dcef0413 | 2490 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2491 | __be32 ret; |
1da177e4 LT |
2492 | |
2493 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2494 | ||
2495 | fp = find_file(ino); | |
13cd2184 N |
2496 | if (!fp) |
2497 | return nfs_ok; | |
b700949b | 2498 | ret = nfserr_locked; |
1da177e4 | 2499 | /* Search for conflicting share reservations */ |
13cd2184 | 2500 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2501 | if (test_deny(deny_type, stp) || |
2502 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2503 | goto out; |
1da177e4 | 2504 | } |
13cd2184 N |
2505 | ret = nfs_ok; |
2506 | out: | |
2507 | put_nfs4_file(fp); | |
2508 | return ret; | |
1da177e4 LT |
2509 | } |
2510 | ||
6b57d9c8 | 2511 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2512 | { |
1da177e4 LT |
2513 | /* We're assuming the state code never drops its reference |
2514 | * without first removing the lease. Since we're in this lease | |
2515 | * callback (and since the lease code is serialized by the kernel | |
2516 | * lock) we know the server hasn't removed the lease yet, we know | |
2517 | * it's safe to take a reference: */ | |
2518 | atomic_inc(&dp->dl_count); | |
2519 | ||
1da177e4 | 2520 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2521 | |
460781b5 | 2522 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2523 | dp->dl_time = get_seconds(); |
2524 | ||
6b57d9c8 BF |
2525 | nfsd4_cb_recall(dp); |
2526 | } | |
2527 | ||
acfdf5c3 | 2528 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2529 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2530 | { | |
acfdf5c3 BF |
2531 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2532 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2533 | |
acfdf5c3 BF |
2534 | BUG_ON(!fp); |
2535 | /* We assume break_lease is only called once per lease: */ | |
2536 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2537 | /* |
2538 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2539 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2540 | * in time: |
0272e1fd BF |
2541 | */ |
2542 | fl->fl_break_time = 0; | |
1da177e4 | 2543 | |
5d926e8c | 2544 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2545 | fp->fi_had_conflict = true; |
2546 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2547 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2548 | spin_unlock(&recall_lock); |
1da177e4 LT |
2549 | } |
2550 | ||
1da177e4 LT |
2551 | static |
2552 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2553 | { | |
2554 | if (arg & F_UNLCK) | |
2555 | return lease_modify(onlist, arg); | |
2556 | else | |
2557 | return -EAGAIN; | |
2558 | } | |
2559 | ||
7b021967 | 2560 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2561 | .lm_break = nfsd_break_deleg_cb, |
2562 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2563 | }; |
2564 | ||
7a8711c9 BF |
2565 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2566 | { | |
2567 | if (nfsd4_has_session(cstate)) | |
2568 | return nfs_ok; | |
2569 | if (seqid == so->so_seqid - 1) | |
2570 | return nfserr_replay_me; | |
2571 | if (seqid == so->so_seqid) | |
2572 | return nfs_ok; | |
2573 | return nfserr_bad_seqid; | |
2574 | } | |
1da177e4 | 2575 | |
b37ad28b | 2576 | __be32 |
6668958f AA |
2577 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2578 | struct nfsd4_open *open) | |
1da177e4 | 2579 | { |
1da177e4 LT |
2580 | clientid_t *clientid = &open->op_clientid; |
2581 | struct nfs4_client *clp = NULL; | |
2582 | unsigned int strhashval; | |
fe0750e5 | 2583 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2584 | __be32 status; |
1da177e4 | 2585 | |
1da177e4 LT |
2586 | if (STALE_CLIENTID(&open->op_clientid)) |
2587 | return nfserr_stale_clientid; | |
32513b40 BF |
2588 | /* |
2589 | * In case we need it later, after we've already created the | |
2590 | * file and don't want to risk a further failure: | |
2591 | */ | |
2592 | open->op_file = nfsd4_alloc_file(); | |
2593 | if (open->op_file == NULL) | |
2594 | return nfserr_jukebox; | |
1da177e4 | 2595 | |
16bfdaaf | 2596 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2597 | oo = find_openstateowner_str(strhashval, open); |
2598 | open->op_openowner = oo; | |
2599 | if (!oo) { | |
1da177e4 LT |
2600 | clp = find_confirmed_client(clientid); |
2601 | if (clp == NULL) | |
0f442aa2 | 2602 | return nfserr_expired; |
bcf130f9 | 2603 | goto new_owner; |
1da177e4 | 2604 | } |
dad1c067 | 2605 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2606 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2607 | clp = oo->oo_owner.so_client; |
2608 | release_openowner(oo); | |
2609 | open->op_openowner = NULL; | |
bcf130f9 | 2610 | goto new_owner; |
0f442aa2 | 2611 | } |
4cdc951b BF |
2612 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2613 | if (status) | |
2614 | return status; | |
2615 | clp = oo->oo_owner.so_client; | |
2616 | goto alloc_stateid; | |
bcf130f9 BF |
2617 | new_owner: |
2618 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2619 | if (oo == NULL) | |
2620 | return nfserr_jukebox; | |
2621 | open->op_openowner = oo; | |
4cdc951b BF |
2622 | alloc_stateid: |
2623 | open->op_stp = nfs4_alloc_stateid(clp); | |
2624 | if (!open->op_stp) | |
2625 | return nfserr_jukebox; | |
0f442aa2 | 2626 | return nfs_ok; |
1da177e4 LT |
2627 | } |
2628 | ||
b37ad28b | 2629 | static inline __be32 |
4a6e43e6 N |
2630 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2631 | { | |
2632 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2633 | return nfserr_openmode; | |
2634 | else | |
2635 | return nfs_ok; | |
2636 | } | |
2637 | ||
f459e453 | 2638 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2639 | { |
f459e453 | 2640 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2641 | } |
2642 | ||
38c2f4b1 | 2643 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2644 | { |
f459e453 | 2645 | struct nfs4_stid *ret; |
24a0111e | 2646 | |
38c2f4b1 | 2647 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2648 | if (!ret) |
2649 | return NULL; | |
2650 | return delegstateid(ret); | |
24a0111e BF |
2651 | } |
2652 | ||
8b289b2c BF |
2653 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2654 | { | |
2655 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2656 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2657 | } | |
2658 | ||
b37ad28b | 2659 | static __be32 |
38c2f4b1 | 2660 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2661 | struct nfs4_delegation **dp) |
2662 | { | |
2663 | int flags; | |
b37ad28b | 2664 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2665 | |
38c2f4b1 | 2666 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2667 | if (*dp == NULL) |
c44c5eeb | 2668 | goto out; |
24a0111e | 2669 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2670 | status = nfs4_check_delegmode(*dp, flags); |
2671 | if (status) | |
2672 | *dp = NULL; | |
c44c5eeb | 2673 | out: |
8b289b2c | 2674 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2675 | return nfs_ok; |
2676 | if (status) | |
2677 | return status; | |
dad1c067 | 2678 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2679 | return nfs_ok; |
567d9829 N |
2680 | } |
2681 | ||
b37ad28b | 2682 | static __be32 |
dcef0413 | 2683 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2684 | { |
dcef0413 | 2685 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2686 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2687 | |
8beefa24 | 2688 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2689 | /* ignore lock owners */ |
2690 | if (local->st_stateowner->so_is_open_owner == 0) | |
2691 | continue; | |
2692 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2693 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2694 | *stpp = local; |
2695 | /* check for conflicting share reservations */ | |
2696 | if (!test_share(local, open)) | |
77eaae8d | 2697 | return nfserr_share_denied; |
1da177e4 | 2698 | } |
77eaae8d | 2699 | return nfs_ok; |
1da177e4 LT |
2700 | } |
2701 | ||
996e0938 BF |
2702 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2703 | { | |
2704 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2705 | } |
2706 | ||
21fb4016 BF |
2707 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2708 | { | |
2709 | int flags = 0; | |
2710 | ||
2711 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2712 | flags |= NFSD_MAY_READ; | |
2713 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2714 | flags |= NFSD_MAY_WRITE; | |
2715 | return flags; | |
2716 | } | |
2717 | ||
0c12eaff CB |
2718 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2719 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2720 | { |
2721 | __be32 status; | |
0c12eaff CB |
2722 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2723 | int access = nfs4_access_to_access(open->op_share_access); | |
2724 | ||
f9d7562f BF |
2725 | if (!fp->fi_fds[oflag]) { |
2726 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2727 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2728 | if (status) |
2729 | return status; | |
2730 | } | |
2731 | nfs4_file_get_access(fp, oflag); | |
2732 | ||
2733 | return nfs_ok; | |
2734 | } | |
2735 | ||
b37ad28b | 2736 | static inline __be32 |
1da177e4 LT |
2737 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2738 | struct nfsd4_open *open) | |
2739 | { | |
2740 | struct iattr iattr = { | |
2741 | .ia_valid = ATTR_SIZE, | |
2742 | .ia_size = 0, | |
2743 | }; | |
2744 | if (!open->op_truncate) | |
2745 | return 0; | |
2746 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2747 | return nfserr_inval; |
1da177e4 LT |
2748 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2749 | } | |
2750 | ||
b37ad28b | 2751 | static __be32 |
dcef0413 | 2752 | 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 | 2753 | { |
b6d2f1ca | 2754 | u32 op_share_access = open->op_share_access; |
7d947842 | 2755 | bool new_access; |
b37ad28b | 2756 | __be32 status; |
1da177e4 | 2757 | |
82c5ff1b | 2758 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2759 | if (new_access) { |
0c12eaff | 2760 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2761 | if (status) |
2762 | return status; | |
6c26d08f | 2763 | } |
1da177e4 LT |
2764 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2765 | if (status) { | |
f9d7562f | 2766 | if (new_access) { |
f197c271 | 2767 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2768 | nfs4_file_put_access(fp, oflag); |
2769 | } | |
1da177e4 LT |
2770 | return status; |
2771 | } | |
2772 | /* remember the open */ | |
82c5ff1b | 2773 | set_access(op_share_access, stp); |
ce0fc43c | 2774 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2775 | |
2776 | return nfs_ok; | |
2777 | } | |
2778 | ||
2779 | ||
1da177e4 | 2780 | static void |
1255a8f3 | 2781 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2782 | { |
dad1c067 | 2783 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2784 | } |
2785 | ||
14a24e99 BF |
2786 | /* Should we give out recallable state?: */ |
2787 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2788 | { | |
2789 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2790 | return true; | |
2791 | /* | |
2792 | * In the sessions case, since we don't have to establish a | |
2793 | * separate connection for callbacks, we assume it's OK | |
2794 | * until we hear otherwise: | |
2795 | */ | |
2796 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2797 | } | |
2798 | ||
22d38c4c BF |
2799 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2800 | { | |
2801 | struct file_lock *fl; | |
2802 | ||
2803 | fl = locks_alloc_lock(); | |
2804 | if (!fl) | |
2805 | return NULL; | |
2806 | locks_init_lock(fl); | |
2807 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2808 | fl->fl_flags = FL_LEASE; | |
2809 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2810 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2811 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2812 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2813 | return fl; |
2814 | } | |
2815 | ||
edab9782 BF |
2816 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2817 | { | |
acfdf5c3 | 2818 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2819 | struct file_lock *fl; |
2820 | int status; | |
2821 | ||
2822 | fl = nfs4_alloc_init_lease(dp, flag); | |
2823 | if (!fl) | |
2824 | return -ENOMEM; | |
acfdf5c3 | 2825 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2826 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2827 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2828 | if (status) { |
acfdf5c3 | 2829 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2830 | locks_free_lock(fl); |
2831 | return -ENOMEM; | |
2832 | } | |
acfdf5c3 BF |
2833 | fp->fi_lease = fl; |
2834 | fp->fi_deleg_file = fl->fl_file; | |
2835 | get_file(fp->fi_deleg_file); | |
2836 | atomic_set(&fp->fi_delegees, 1); | |
2837 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2838 | return 0; | |
2839 | } | |
2840 | ||
2841 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2842 | { | |
2843 | struct nfs4_file *fp = dp->dl_file; | |
2844 | ||
2845 | if (!fp->fi_lease) | |
2846 | return nfs4_setlease(dp, flag); | |
2847 | spin_lock(&recall_lock); | |
2848 | if (fp->fi_had_conflict) { | |
2849 | spin_unlock(&recall_lock); | |
2850 | return -EAGAIN; | |
2851 | } | |
2852 | atomic_inc(&fp->fi_delegees); | |
2853 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2854 | spin_unlock(&recall_lock); | |
2a74aba7 | 2855 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2856 | return 0; |
2857 | } | |
2858 | ||
4aa8913c BH |
2859 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2860 | { | |
2861 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2862 | if (status == -EAGAIN) | |
2863 | open->op_why_no_deleg = WND4_CONTENTION; | |
2864 | else { | |
2865 | open->op_why_no_deleg = WND4_RESOURCE; | |
2866 | switch (open->op_deleg_want) { | |
2867 | case NFS4_SHARE_WANT_READ_DELEG: | |
2868 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2869 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2870 | break; | |
2871 | case NFS4_SHARE_WANT_CANCEL: | |
2872 | open->op_why_no_deleg = WND4_CANCELLED; | |
2873 | break; | |
2874 | case NFS4_SHARE_WANT_NO_DELEG: | |
2875 | BUG(); /* not supposed to get here */ | |
2876 | } | |
2877 | } | |
2878 | } | |
2879 | ||
1da177e4 LT |
2880 | /* |
2881 | * Attempt to hand out a delegation. | |
2882 | */ | |
2883 | static void | |
dcef0413 | 2884 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2885 | { |
2886 | struct nfs4_delegation *dp; | |
fe0750e5 | 2887 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2888 | int cb_up; |
d24433cd | 2889 | int status = 0, flag = 0; |
1da177e4 | 2890 | |
fe0750e5 | 2891 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2892 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2893 | open->op_recall = 0; |
2894 | switch (open->op_claim_type) { | |
2895 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2896 | if (!cb_up) |
7b190fec N |
2897 | open->op_recall = 1; |
2898 | flag = open->op_delegate_type; | |
2899 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2900 | goto out; | |
2901 | break; | |
2902 | case NFS4_OPEN_CLAIM_NULL: | |
2903 | /* Let's not give out any delegations till everyone's | |
2904 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2905 | if (locks_in_grace()) |
7b190fec | 2906 | goto out; |
dad1c067 | 2907 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2908 | goto out; |
2909 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2910 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2911 | else | |
2912 | flag = NFS4_OPEN_DELEGATE_READ; | |
2913 | break; | |
2914 | default: | |
2915 | goto out; | |
2916 | } | |
1da177e4 | 2917 | |
fe0750e5 | 2918 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2919 | if (dp == NULL) |
2920 | goto out_no_deleg; | |
acfdf5c3 | 2921 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2922 | if (status) |
dd239cc0 | 2923 | goto out_free; |
1da177e4 | 2924 | |
d5477a8d | 2925 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2926 | |
8c10cbdb | 2927 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2928 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2929 | out: |
2930 | open->op_delegate_type = flag; | |
d24433cd BH |
2931 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2932 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2933 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2934 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2935 | ||
4aa8913c BH |
2936 | /* 4.1 client asking for a delegation? */ |
2937 | if (open->op_deleg_want) | |
2938 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2939 | } |
dd239cc0 BF |
2940 | return; |
2941 | out_free: | |
acfdf5c3 | 2942 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2943 | out_no_deleg: |
2944 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2945 | goto out; | |
1da177e4 LT |
2946 | } |
2947 | ||
e27f49c3 BH |
2948 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2949 | struct nfs4_delegation *dp) | |
2950 | { | |
2951 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2952 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2953 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2954 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2955 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2956 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2957 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2958 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2959 | } | |
2960 | /* Otherwise the client must be confused wanting a delegation | |
2961 | * it already has, therefore we don't return | |
2962 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
2963 | */ | |
2964 | } | |
2965 | ||
1da177e4 LT |
2966 | /* |
2967 | * called with nfs4_lock_state() held. | |
2968 | */ | |
b37ad28b | 2969 | __be32 |
1da177e4 LT |
2970 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2971 | { | |
6668958f | 2972 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2973 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2974 | struct nfs4_file *fp = NULL; |
2975 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2976 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2977 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2978 | __be32 status; |
1da177e4 | 2979 | |
1da177e4 LT |
2980 | /* |
2981 | * Lookup file; if found, lookup stateid and check open request, | |
2982 | * and check for delegations in the process of being recalled. | |
2983 | * If not found, create the nfs4_file struct | |
2984 | */ | |
2985 | fp = find_file(ino); | |
2986 | if (fp) { | |
2987 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2988 | goto out; | |
38c2f4b1 | 2989 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
2990 | if (status) |
2991 | goto out; | |
1da177e4 | 2992 | } else { |
c44c5eeb | 2993 | status = nfserr_bad_stateid; |
8b289b2c | 2994 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 2995 | goto out; |
3e772463 | 2996 | status = nfserr_jukebox; |
32513b40 BF |
2997 | fp = open->op_file; |
2998 | open->op_file = NULL; | |
2999 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3000 | } |
3001 | ||
3002 | /* | |
3003 | * OPEN the file, or upgrade an existing OPEN. | |
3004 | * If truncate fails, the OPEN fails. | |
3005 | */ | |
3006 | if (stp) { | |
3007 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3008 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3009 | if (status) |
3010 | goto out; | |
3011 | } else { | |
4cdc951b | 3012 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3013 | if (status) |
1da177e4 | 3014 | goto out; |
4cdc951b BF |
3015 | stp = open->op_stp; |
3016 | open->op_stp = NULL; | |
996e0938 | 3017 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
3018 | status = nfsd4_truncate(rqstp, current_fh, open); |
3019 | if (status) { | |
2283963f | 3020 | release_open_stateid(stp); |
1da177e4 LT |
3021 | goto out; |
3022 | } | |
3023 | } | |
dcef0413 BF |
3024 | update_stateid(&stp->st_stid.sc_stateid); |
3025 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3026 | |
d24433cd | 3027 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3028 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3029 | |
d24433cd BH |
3030 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3031 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3032 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3033 | goto nodeleg; | |
3034 | } | |
3035 | } | |
3036 | ||
1da177e4 LT |
3037 | /* |
3038 | * Attempt to hand out a delegation. No error return, because the | |
3039 | * OPEN succeeds even if we fail. | |
3040 | */ | |
3041 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3042 | nodeleg: |
1da177e4 LT |
3043 | status = nfs_ok; |
3044 | ||
8c10cbdb | 3045 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3046 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3047 | out: |
d24433cd BH |
3048 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3049 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3050 | open->op_deleg_want) |
3051 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3052 | |
13cd2184 N |
3053 | if (fp) |
3054 | put_nfs4_file(fp); | |
37515177 | 3055 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3056 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3057 | /* |
3058 | * To finish the open response, we just need to set the rflags. | |
3059 | */ | |
3060 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3061 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3062 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3063 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3064 | ||
3065 | return status; | |
3066 | } | |
3067 | ||
d29b20cd BF |
3068 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3069 | { | |
3070 | if (open->op_openowner) { | |
3071 | struct nfs4_openowner *oo = open->op_openowner; | |
3072 | ||
3073 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3074 | list_del_init(&oo->oo_close_lru); | |
3075 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3076 | if (status) { | |
3077 | release_openowner(oo); | |
3078 | open->op_openowner = NULL; | |
3079 | } else | |
3080 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3081 | } | |
3082 | } | |
32513b40 BF |
3083 | if (open->op_file) |
3084 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3085 | if (open->op_stp) |
3086 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3087 | } |
3088 | ||
b37ad28b | 3089 | __be32 |
b591480b BF |
3090 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3091 | clientid_t *clid) | |
1da177e4 LT |
3092 | { |
3093 | struct nfs4_client *clp; | |
b37ad28b | 3094 | __be32 status; |
1da177e4 LT |
3095 | |
3096 | nfs4_lock_state(); | |
3097 | dprintk("process_renew(%08x/%08x): starting\n", | |
3098 | clid->cl_boot, clid->cl_id); | |
3099 | status = nfserr_stale_clientid; | |
3100 | if (STALE_CLIENTID(clid)) | |
3101 | goto out; | |
3102 | clp = find_confirmed_client(clid); | |
3103 | status = nfserr_expired; | |
3104 | if (clp == NULL) { | |
3105 | /* We assume the client took too long to RENEW. */ | |
3106 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3107 | goto out; | |
3108 | } | |
1da177e4 | 3109 | status = nfserr_cb_path_down; |
ea1da636 | 3110 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3111 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3112 | goto out; |
3113 | status = nfs_ok; | |
3114 | out: | |
3115 | nfs4_unlock_state(); | |
3116 | return status; | |
3117 | } | |
3118 | ||
c47d832b | 3119 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3120 | }; |
3121 | ||
33dcc481 JL |
3122 | static bool grace_ended; |
3123 | ||
a76b4319 | 3124 | static void |
af558e33 | 3125 | nfsd4_end_grace(void) |
a76b4319 | 3126 | { |
33dcc481 JL |
3127 | /* do nothing if grace period already ended */ |
3128 | if (grace_ended) | |
3129 | return; | |
3130 | ||
a76b4319 | 3131 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3132 | grace_ended = true; |
2a4317c5 | 3133 | nfsd4_record_grace_done(&init_net, boot_time); |
af558e33 | 3134 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3135 | /* |
3136 | * Now that every NFSv4 client has had the chance to recover and | |
3137 | * to see the (possibly new, possibly shorter) lease time, we | |
3138 | * can safely set the next grace time to the current lease time: | |
3139 | */ | |
3140 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3141 | } |
3142 | ||
fd39ca9a | 3143 | static time_t |
1da177e4 LT |
3144 | nfs4_laundromat(void) |
3145 | { | |
3146 | struct nfs4_client *clp; | |
fe0750e5 | 3147 | struct nfs4_openowner *oo; |
1da177e4 LT |
3148 | struct nfs4_delegation *dp; |
3149 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3150 | time_t cutoff = get_seconds() - nfsd4_lease; |
3151 | time_t t, clientid_val = nfsd4_lease; | |
3152 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3153 | |
3154 | nfs4_lock_state(); | |
3155 | ||
3156 | dprintk("NFSD: laundromat service - starting\n"); | |
33dcc481 | 3157 | nfsd4_end_grace(); |
36acb66b BH |
3158 | INIT_LIST_HEAD(&reaplist); |
3159 | spin_lock(&client_lock); | |
1da177e4 LT |
3160 | list_for_each_safe(pos, next, &client_lru) { |
3161 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3162 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3163 | t = clp->cl_time - cutoff; | |
3164 | if (clientid_val > t) | |
3165 | clientid_val = t; | |
3166 | break; | |
3167 | } | |
d7682988 BH |
3168 | if (atomic_read(&clp->cl_refcount)) { |
3169 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3170 | clp->cl_clientid.cl_id); | |
3171 | continue; | |
3172 | } | |
3173 | unhash_client_locked(clp); | |
3174 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3175 | } |
3176 | spin_unlock(&client_lock); | |
3177 | list_for_each_safe(pos, next, &reaplist) { | |
3178 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3179 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3180 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3181 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3182 | expire_client(clp); |
3183 | } | |
1da177e4 LT |
3184 | spin_lock(&recall_lock); |
3185 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3186 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3187 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3188 | u = dp->dl_time - cutoff; | |
3189 | if (test_val > u) | |
3190 | test_val = u; | |
3191 | break; | |
3192 | } | |
1da177e4 LT |
3193 | list_move(&dp->dl_recall_lru, &reaplist); |
3194 | } | |
3195 | spin_unlock(&recall_lock); | |
3196 | list_for_each_safe(pos, next, &reaplist) { | |
3197 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3198 | unhash_delegation(dp); |
3199 | } | |
cf07d2ea | 3200 | test_val = nfsd4_lease; |
1da177e4 | 3201 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3202 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3203 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3204 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3205 | if (test_val > u) |
3206 | test_val = u; | |
3207 | break; | |
3208 | } | |
fe0750e5 | 3209 | release_openowner(oo); |
1da177e4 LT |
3210 | } |
3211 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3212 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3213 | nfs4_unlock_state(); | |
3214 | return clientid_val; | |
3215 | } | |
3216 | ||
a254b246 HH |
3217 | static struct workqueue_struct *laundry_wq; |
3218 | static void laundromat_main(struct work_struct *); | |
3219 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3220 | ||
3221 | static void | |
c4028958 | 3222 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3223 | { |
3224 | time_t t; | |
3225 | ||
3226 | t = nfs4_laundromat(); | |
3227 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3228 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3229 | } |
3230 | ||
f7a4d872 | 3231 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3232 | { |
f7a4d872 BF |
3233 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3234 | return nfserr_bad_stateid; | |
3235 | return nfs_ok; | |
1da177e4 LT |
3236 | } |
3237 | ||
3238 | static int | |
3239 | STALE_STATEID(stateid_t *stateid) | |
3240 | { | |
d3b313a4 | 3241 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3242 | return 0; |
3243 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3244 | STATEID_VAL(stateid)); |
e4e83ea4 | 3245 | return 1; |
1da177e4 LT |
3246 | } |
3247 | ||
3248 | static inline int | |
82c5ff1b | 3249 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3250 | { |
82c5ff1b JL |
3251 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3252 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3253 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3254 | } |
3255 | ||
3256 | static inline int | |
82c5ff1b | 3257 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3258 | { |
82c5ff1b JL |
3259 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3260 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3261 | } |
3262 | ||
3263 | static | |
dcef0413 | 3264 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3265 | { |
b37ad28b | 3266 | __be32 status = nfserr_openmode; |
1da177e4 | 3267 | |
02921914 BF |
3268 | /* For lock stateid's, we test the parent open, not the lock: */ |
3269 | if (stp->st_openstp) | |
3270 | stp = stp->st_openstp; | |
82c5ff1b | 3271 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3272 | goto out; |
82c5ff1b | 3273 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3274 | goto out; |
3275 | status = nfs_ok; | |
3276 | out: | |
3277 | return status; | |
3278 | } | |
3279 | ||
b37ad28b | 3280 | static inline __be32 |
1da177e4 LT |
3281 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3282 | { | |
203a8c8e | 3283 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3284 | return nfs_ok; |
af558e33 | 3285 | else if (locks_in_grace()) { |
25985edc | 3286 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3287 | * conflicting state; so we must wait out the grace period. */ |
3288 | return nfserr_grace; | |
3289 | } else if (flags & WR_STATE) | |
3290 | return nfs4_share_conflict(current_fh, | |
3291 | NFS4_SHARE_DENY_WRITE); | |
3292 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3293 | return nfs4_share_conflict(current_fh, | |
3294 | NFS4_SHARE_DENY_READ); | |
3295 | } | |
3296 | ||
3297 | /* | |
3298 | * Allow READ/WRITE during grace period on recovered state only for files | |
3299 | * that are not able to provide mandatory locking. | |
3300 | */ | |
3301 | static inline int | |
18f82731 | 3302 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3303 | { |
203a8c8e | 3304 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3305 | } |
3306 | ||
81b82965 BF |
3307 | /* Returns true iff a is later than b: */ |
3308 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3309 | { | |
3310 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3311 | } | |
3312 | ||
57b7b43b | 3313 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3314 | { |
6668958f AA |
3315 | /* |
3316 | * When sessions are used the stateid generation number is ignored | |
3317 | * when it is zero. | |
3318 | */ | |
28dde241 | 3319 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3320 | return nfs_ok; |
3321 | ||
3322 | if (in->si_generation == ref->si_generation) | |
3323 | return nfs_ok; | |
6668958f | 3324 | |
0836f587 | 3325 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3326 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3327 | return nfserr_bad_stateid; |
3328 | /* | |
81b82965 BF |
3329 | * However, we could see a stateid from the past, even from a |
3330 | * non-buggy client. For example, if the client sends a lock | |
3331 | * while some IO is outstanding, the lock may bump si_generation | |
3332 | * while the IO is still in flight. The client could avoid that | |
3333 | * situation by waiting for responses on all the IO requests, | |
3334 | * but better performance may result in retrying IO that | |
3335 | * receives an old_stateid error if requests are rarely | |
3336 | * reordered in flight: | |
0836f587 | 3337 | */ |
81b82965 | 3338 | return nfserr_old_stateid; |
0836f587 BF |
3339 | } |
3340 | ||
38c2f4b1 | 3341 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3342 | { |
97b7e3b6 BF |
3343 | struct nfs4_stid *s; |
3344 | struct nfs4_ol_stateid *ols; | |
3345 | __be32 status; | |
17456804 BS |
3346 | |
3347 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3348 | return nfserr_stale_stateid; |
17456804 | 3349 | |
38c2f4b1 | 3350 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3351 | if (!s) |
3352 | return nfserr_stale_stateid; | |
36279ac1 | 3353 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3354 | if (status) |
97b7e3b6 BF |
3355 | return status; |
3356 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3357 | return nfs_ok; | |
3358 | ols = openlockstateid(s); | |
3359 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3360 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3361 | return nfserr_bad_stateid; |
3362 | return nfs_ok; | |
17456804 BS |
3363 | } |
3364 | ||
38c2f4b1 BF |
3365 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3366 | { | |
3367 | struct nfs4_client *cl; | |
3368 | ||
3369 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3370 | return nfserr_bad_stateid; | |
3371 | if (STALE_STATEID(stateid)) | |
3372 | return nfserr_stale_stateid; | |
3373 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3374 | if (!cl) | |
3375 | return nfserr_expired; | |
3376 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3377 | if (!*s) | |
3378 | return nfserr_bad_stateid; | |
3379 | return nfs_ok; | |
3380 | ||
3381 | } | |
3382 | ||
1da177e4 LT |
3383 | /* |
3384 | * Checks for stateid operations | |
3385 | */ | |
b37ad28b | 3386 | __be32 |
dd453dfd BH |
3387 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3388 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3389 | { |
69064a27 | 3390 | struct nfs4_stid *s; |
dcef0413 | 3391 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3392 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3393 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3394 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3395 | __be32 status; |
1da177e4 | 3396 | |
1da177e4 LT |
3397 | if (filpp) |
3398 | *filpp = NULL; | |
3399 | ||
18f82731 | 3400 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3401 | return nfserr_grace; |
3402 | ||
3403 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3404 | return check_special_stateids(current_fh, stateid, flags); | |
3405 | ||
38c2f4b1 BF |
3406 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3407 | if (status) | |
3408 | return status; | |
69064a27 BF |
3409 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3410 | if (status) | |
3411 | goto out; | |
f7a4d872 BF |
3412 | switch (s->sc_type) { |
3413 | case NFS4_DELEG_STID: | |
69064a27 | 3414 | dp = delegstateid(s); |
dc9bf700 BF |
3415 | status = nfs4_check_delegmode(dp, flags); |
3416 | if (status) | |
3417 | goto out; | |
43b0178e | 3418 | if (filpp) { |
acfdf5c3 | 3419 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3420 | BUG_ON(!*filpp); |
3421 | } | |
f7a4d872 BF |
3422 | break; |
3423 | case NFS4_OPEN_STID: | |
3424 | case NFS4_LOCK_STID: | |
69064a27 | 3425 | stp = openlockstateid(s); |
f7a4d872 BF |
3426 | status = nfs4_check_fh(current_fh, stp); |
3427 | if (status) | |
1da177e4 | 3428 | goto out; |
fe0750e5 | 3429 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3430 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3431 | goto out; |
a4455be0 BF |
3432 | status = nfs4_check_openmode(stp, flags); |
3433 | if (status) | |
1da177e4 | 3434 | goto out; |
f9d7562f BF |
3435 | if (filpp) { |
3436 | if (flags & RD_STATE) | |
3437 | *filpp = find_readable_file(stp->st_file); | |
3438 | else | |
3439 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3440 | } |
f7a4d872 BF |
3441 | break; |
3442 | default: | |
3443 | return nfserr_bad_stateid; | |
1da177e4 LT |
3444 | } |
3445 | status = nfs_ok; | |
3446 | out: | |
3447 | return status; | |
3448 | } | |
3449 | ||
e1ca12df | 3450 | static __be32 |
dcef0413 | 3451 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3452 | { |
fe0750e5 | 3453 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3454 | return nfserr_locks_held; |
3455 | release_lock_stateid(stp); | |
3456 | return nfs_ok; | |
3457 | } | |
3458 | ||
17456804 BS |
3459 | /* |
3460 | * Test if the stateid is valid | |
3461 | */ | |
3462 | __be32 | |
3463 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3464 | struct nfsd4_test_stateid *test_stateid) | |
3465 | { | |
03cfb420 BS |
3466 | struct nfsd4_test_stateid_id *stateid; |
3467 | struct nfs4_client *cl = cstate->session->se_client; | |
3468 | ||
3469 | nfs4_lock_state(); | |
3470 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
3471 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); | |
3472 | nfs4_unlock_state(); | |
3473 | ||
17456804 BS |
3474 | return nfs_ok; |
3475 | } | |
3476 | ||
e1ca12df BS |
3477 | __be32 |
3478 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3479 | struct nfsd4_free_stateid *free_stateid) | |
3480 | { | |
3481 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3482 | struct nfs4_stid *s; |
38c2f4b1 | 3483 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3484 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3485 | |
3486 | nfs4_lock_state(); | |
38c2f4b1 | 3487 | s = find_stateid(cl, stateid); |
2da1cec7 | 3488 | if (!s) |
81b82965 | 3489 | goto out; |
2da1cec7 BF |
3490 | switch (s->sc_type) { |
3491 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3492 | ret = nfserr_locks_held; |
3493 | goto out; | |
2da1cec7 BF |
3494 | case NFS4_OPEN_STID: |
3495 | case NFS4_LOCK_STID: | |
3496 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3497 | if (ret) | |
3498 | goto out; | |
3499 | if (s->sc_type == NFS4_LOCK_STID) | |
3500 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3501 | else | |
3502 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3503 | break; |
3504 | default: | |
3505 | ret = nfserr_bad_stateid; | |
e1ca12df | 3506 | } |
e1ca12df BS |
3507 | out: |
3508 | nfs4_unlock_state(); | |
3509 | return ret; | |
3510 | } | |
3511 | ||
4c4cd222 N |
3512 | static inline int |
3513 | setlkflg (int type) | |
3514 | { | |
3515 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3516 | RD_STATE : WR_STATE; | |
3517 | } | |
1da177e4 | 3518 | |
dcef0413 | 3519 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3520 | { |
3521 | struct svc_fh *current_fh = &cstate->current_fh; | |
3522 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3523 | __be32 status; | |
3524 | ||
c0a5d93e BF |
3525 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3526 | if (status) | |
3527 | return status; | |
f7a4d872 BF |
3528 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3529 | /* | |
3530 | * "Closed" stateid's exist *only* to return | |
3531 | * nfserr_replay_me from the previous step. | |
3532 | */ | |
3533 | return nfserr_bad_stateid; | |
3534 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3535 | if (status) | |
3536 | return status; | |
3537 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3538 | } |
3539 | ||
1da177e4 LT |
3540 | /* |
3541 | * Checks for sequence id mutating operations. | |
3542 | */ | |
b37ad28b | 3543 | static __be32 |
dd453dfd | 3544 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3545 | stateid_t *stateid, char typemask, |
dcef0413 | 3546 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3547 | { |
0836f587 | 3548 | __be32 status; |
38c2f4b1 | 3549 | struct nfs4_stid *s; |
1da177e4 | 3550 | |
8c10cbdb BH |
3551 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3552 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3553 | |
1da177e4 | 3554 | *stpp = NULL; |
38c2f4b1 | 3555 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3556 | if (status) |
3557 | return status; | |
38c2f4b1 | 3558 | *stpp = openlockstateid(s); |
c0a5d93e | 3559 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3560 | |
c0a5d93e BF |
3561 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3562 | } | |
39325bd0 | 3563 | |
dcef0413 | 3564 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3565 | { |
3566 | __be32 status; | |
3567 | struct nfs4_openowner *oo; | |
1da177e4 | 3568 | |
c0a5d93e | 3569 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3570 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3571 | if (status) |
3572 | return status; | |
c0a5d93e | 3573 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3574 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3575 | return nfserr_bad_stateid; |
3a4f98bb | 3576 | return nfs_ok; |
1da177e4 LT |
3577 | } |
3578 | ||
b37ad28b | 3579 | __be32 |
ca364317 | 3580 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3581 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3582 | { |
b37ad28b | 3583 | __be32 status; |
fe0750e5 | 3584 | struct nfs4_openowner *oo; |
dcef0413 | 3585 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3586 | |
3587 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3588 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3589 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3590 | |
ca364317 | 3591 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3592 | if (status) |
3593 | return status; | |
1da177e4 LT |
3594 | |
3595 | nfs4_lock_state(); | |
3596 | ||
9072d5c6 | 3597 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3598 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3599 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3600 | if (status) |
68b66e82 | 3601 | goto out; |
fe0750e5 | 3602 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3603 | status = nfserr_bad_stateid; |
dad1c067 | 3604 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3605 | goto out; |
dad1c067 | 3606 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3607 | update_stateid(&stp->st_stid.sc_stateid); |
3608 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3609 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3610 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3611 | |
2a4317c5 | 3612 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3613 | status = nfs_ok; |
1da177e4 | 3614 | out: |
5ec094c1 BF |
3615 | if (!cstate->replay_owner) |
3616 | nfs4_unlock_state(); | |
1da177e4 LT |
3617 | return status; |
3618 | } | |
3619 | ||
6409a5a6 | 3620 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3621 | { |
82c5ff1b | 3622 | if (!test_access(access, stp)) |
6409a5a6 BF |
3623 | return; |
3624 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3625 | clear_access(access, stp); |
6409a5a6 | 3626 | } |
f197c271 | 3627 | |
6409a5a6 BF |
3628 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3629 | { | |
3630 | switch (to_access) { | |
3631 | case NFS4_SHARE_ACCESS_READ: | |
3632 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3633 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3634 | break; | |
3635 | case NFS4_SHARE_ACCESS_WRITE: | |
3636 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3637 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3638 | break; | |
3639 | case NFS4_SHARE_ACCESS_BOTH: | |
3640 | break; | |
3641 | default: | |
3642 | BUG(); | |
1da177e4 LT |
3643 | } |
3644 | } | |
3645 | ||
3646 | static void | |
ce0fc43c | 3647 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3648 | { |
3649 | int i; | |
3650 | for (i = 0; i < 4; i++) { | |
3651 | if ((i & deny) != i) | |
ce0fc43c | 3652 | clear_deny(i, stp); |
1da177e4 LT |
3653 | } |
3654 | } | |
3655 | ||
b37ad28b | 3656 | __be32 |
ca364317 BF |
3657 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3658 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3659 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3660 | { |
b37ad28b | 3661 | __be32 status; |
dcef0413 | 3662 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3663 | |
3664 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3665 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3666 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3667 | |
c30e92df | 3668 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3669 | if (od->od_deleg_want) |
3670 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3671 | od->od_deleg_want); | |
1da177e4 LT |
3672 | |
3673 | nfs4_lock_state(); | |
c0a5d93e BF |
3674 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3675 | &od->od_stateid, &stp); | |
9072d5c6 | 3676 | if (status) |
1da177e4 | 3677 | goto out; |
1da177e4 | 3678 | status = nfserr_inval; |
82c5ff1b JL |
3679 | if (!test_access(od->od_share_access, stp)) { |
3680 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3681 | stp->st_access_bmap, od->od_share_access); |
3682 | goto out; | |
3683 | } | |
ce0fc43c | 3684 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3685 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3686 | stp->st_deny_bmap, od->od_share_deny); | |
3687 | goto out; | |
3688 | } | |
6409a5a6 | 3689 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3690 | |
ce0fc43c | 3691 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3692 | |
dcef0413 BF |
3693 | update_stateid(&stp->st_stid.sc_stateid); |
3694 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3695 | status = nfs_ok; |
3696 | out: | |
5ec094c1 BF |
3697 | if (!cstate->replay_owner) |
3698 | nfs4_unlock_state(); | |
1da177e4 LT |
3699 | return status; |
3700 | } | |
3701 | ||
38c387b5 BF |
3702 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3703 | { | |
3704 | struct nfs4_openowner *oo; | |
3705 | struct nfs4_ol_stateid *s; | |
3706 | ||
3707 | if (!so->so_is_open_owner) | |
3708 | return; | |
3709 | oo = openowner(so); | |
3710 | s = oo->oo_last_closed_stid; | |
3711 | if (!s) | |
3712 | return; | |
3713 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3714 | /* Release the last_closed_stid on the next seqid bump: */ | |
3715 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3716 | return; | |
3717 | } | |
3718 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3719 | release_last_closed_stateid(oo); |
3720 | } | |
3721 | ||
3722 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3723 | { | |
3724 | unhash_open_stateid(s); | |
3725 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3726 | } |
3727 | ||
1da177e4 LT |
3728 | /* |
3729 | * nfs4_unlock_state() called after encode | |
3730 | */ | |
b37ad28b | 3731 | __be32 |
ca364317 | 3732 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3733 | struct nfsd4_close *close) |
1da177e4 | 3734 | { |
b37ad28b | 3735 | __be32 status; |
fe0750e5 | 3736 | struct nfs4_openowner *oo; |
dcef0413 | 3737 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3738 | |
3739 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3740 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3741 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3742 | |
3743 | nfs4_lock_state(); | |
f7a4d872 BF |
3744 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3745 | &close->cl_stateid, | |
3746 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3747 | &stp); | |
9072d5c6 | 3748 | if (status) |
1da177e4 | 3749 | goto out; |
fe0750e5 | 3750 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3751 | status = nfs_ok; |
dcef0413 BF |
3752 | update_stateid(&stp->st_stid.sc_stateid); |
3753 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3754 | |
f7a4d872 | 3755 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3756 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3757 | |
3758 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3759 | * released by the laundromat service after the lease period | |
3760 | * to enable us to handle CLOSE replay | |
3761 | */ | |
fe0750e5 BF |
3762 | if (list_empty(&oo->oo_owner.so_stateids)) |
3763 | move_to_close_lru(oo); | |
1da177e4 | 3764 | out: |
5ec094c1 BF |
3765 | if (!cstate->replay_owner) |
3766 | nfs4_unlock_state(); | |
1da177e4 LT |
3767 | return status; |
3768 | } | |
3769 | ||
b37ad28b | 3770 | __be32 |
ca364317 BF |
3771 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3772 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3773 | { |
203a8c8e BF |
3774 | struct nfs4_delegation *dp; |
3775 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3776 | struct nfs4_stid *s; |
203a8c8e | 3777 | struct inode *inode; |
b37ad28b | 3778 | __be32 status; |
1da177e4 | 3779 | |
ca364317 | 3780 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3781 | return status; |
3782 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3783 | |
3784 | nfs4_lock_state(); | |
38c2f4b1 BF |
3785 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3786 | if (status) | |
203a8c8e | 3787 | goto out; |
38c2f4b1 | 3788 | dp = delegstateid(s); |
d5477a8d | 3789 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3790 | if (status) |
3791 | goto out; | |
203a8c8e BF |
3792 | |
3793 | unhash_delegation(dp); | |
1da177e4 | 3794 | out: |
203a8c8e BF |
3795 | nfs4_unlock_state(); |
3796 | ||
1da177e4 LT |
3797 | return status; |
3798 | } | |
3799 | ||
3800 | ||
1da177e4 | 3801 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3802 | |
009673b4 BF |
3803 | #define LOCKOWNER_INO_HASH_BITS 8 |
3804 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3805 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3806 | |
87df4de8 BH |
3807 | static inline u64 |
3808 | end_offset(u64 start, u64 len) | |
3809 | { | |
3810 | u64 end; | |
3811 | ||
3812 | end = start + len; | |
3813 | return end >= start ? end: NFS4_MAX_UINT64; | |
3814 | } | |
3815 | ||
3816 | /* last octet in a range */ | |
3817 | static inline u64 | |
3818 | last_byte_offset(u64 start, u64 len) | |
3819 | { | |
3820 | u64 end; | |
3821 | ||
3822 | BUG_ON(!len); | |
3823 | end = start + len; | |
3824 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3825 | } | |
3826 | ||
009673b4 | 3827 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3828 | { |
3829 | return (file_hashval(inode) + cl_id | |
3830 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3831 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3832 | } |
3833 | ||
009673b4 | 3834 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3835 | |
1da177e4 LT |
3836 | /* |
3837 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3838 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3839 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3840 | * locking, this prevents us from being completely protocol-compliant. The | |
3841 | * real solution to this problem is to start using unsigned file offsets in | |
3842 | * the VFS, but this is a very deep change! | |
3843 | */ | |
3844 | static inline void | |
3845 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3846 | { | |
3847 | if (lock->fl_start < 0) | |
3848 | lock->fl_start = OFFSET_MAX; | |
3849 | if (lock->fl_end < 0) | |
3850 | lock->fl_end = OFFSET_MAX; | |
3851 | } | |
3852 | ||
d5b9026a N |
3853 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3854 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3855 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3856 | }; |
1da177e4 LT |
3857 | |
3858 | static inline void | |
3859 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3860 | { | |
fe0750e5 | 3861 | struct nfs4_lockowner *lo; |
1da177e4 | 3862 | |
d5b9026a | 3863 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3864 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3865 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3866 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3867 | if (!deny->ld_owner.data) |
3868 | /* We just don't care that much */ | |
3869 | goto nevermind; | |
fe0750e5 BF |
3870 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3871 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3872 | } else { |
7c13f344 BF |
3873 | nevermind: |
3874 | deny->ld_owner.len = 0; | |
3875 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3876 | deny->ld_clientid.cl_boot = 0; |
3877 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3878 | } |
3879 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3880 | deny->ld_length = NFS4_MAX_UINT64; |
3881 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3882 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3883 | deny->ld_type = NFS4_READ_LT; | |
3884 | if (fl->fl_type != F_RDLCK) | |
3885 | deny->ld_type = NFS4_WRITE_LT; | |
3886 | } | |
3887 | ||
b93d87c1 BF |
3888 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3889 | { | |
3890 | struct nfs4_ol_stateid *lst; | |
3891 | ||
3892 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3893 | return false; | |
3894 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3895 | struct nfs4_ol_stateid, st_perstateowner); | |
3896 | return lst->st_file->fi_inode == inode; | |
3897 | } | |
3898 | ||
fe0750e5 BF |
3899 | static struct nfs4_lockowner * |
3900 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3901 | struct xdr_netobj *owner) |
3902 | { | |
009673b4 | 3903 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3904 | struct nfs4_lockowner *lo; |
1da177e4 | 3905 | |
009673b4 | 3906 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3907 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3908 | return lo; | |
1da177e4 LT |
3909 | } |
3910 | return NULL; | |
3911 | } | |
3912 | ||
dcef0413 | 3913 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3914 | { |
009673b4 BF |
3915 | struct inode *inode = open_stp->st_file->fi_inode; |
3916 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3917 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3918 | ||
16bfdaaf | 3919 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3920 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3921 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3922 | } |
3923 | ||
1da177e4 LT |
3924 | /* |
3925 | * Alloc a lock owner structure. | |
3926 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3927 | * occurred. |
1da177e4 | 3928 | * |
16bfdaaf | 3929 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3930 | */ |
3931 | ||
fe0750e5 | 3932 | static struct nfs4_lockowner * |
dcef0413 | 3933 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3934 | struct nfs4_lockowner *lo; |
1da177e4 | 3935 | |
fe0750e5 BF |
3936 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3937 | if (!lo) | |
1da177e4 | 3938 | return NULL; |
fe0750e5 BF |
3939 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3940 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3941 | /* It is the openowner seqid that will be incremented in encode in the |
3942 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3943 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3944 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3945 | return lo; | |
1da177e4 LT |
3946 | } |
3947 | ||
dcef0413 BF |
3948 | static struct nfs4_ol_stateid * |
3949 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3950 | { |
dcef0413 | 3951 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3952 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3953 | |
996e0938 | 3954 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3955 | if (stp == NULL) |
6136d2b4 | 3956 | return NULL; |
996e0938 | 3957 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3958 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3959 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3960 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3961 | get_nfs4_file(fp); |
1da177e4 | 3962 | stp->st_file = fp; |
0997b173 | 3963 | stp->st_access_bmap = 0; |
1da177e4 | 3964 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3965 | stp->st_openstp = open_stp; |
1da177e4 LT |
3966 | return stp; |
3967 | } | |
3968 | ||
fd39ca9a | 3969 | static int |
1da177e4 LT |
3970 | check_lock_length(u64 offset, u64 length) |
3971 | { | |
87df4de8 | 3972 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3973 | LOFF_OVERFLOW(offset, length))); |
3974 | } | |
3975 | ||
dcef0413 | 3976 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3977 | { |
3978 | struct nfs4_file *fp = lock_stp->st_file; | |
3979 | int oflag = nfs4_access_to_omode(access); | |
3980 | ||
82c5ff1b | 3981 | if (test_access(access, lock_stp)) |
0997b173 BF |
3982 | return; |
3983 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 3984 | set_access(access, lock_stp); |
0997b173 BF |
3985 | } |
3986 | ||
2355c596 | 3987 | 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 |
3988 | { |
3989 | struct nfs4_file *fi = ost->st_file; | |
3990 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
3991 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
3992 | struct nfs4_lockowner *lo; | |
3993 | unsigned int strhashval; | |
3994 | ||
3995 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
3996 | if (lo) { | |
3997 | if (!cstate->minorversion) | |
3998 | return nfserr_bad_seqid; | |
3999 | /* XXX: a lockowner always has exactly one stateid: */ | |
4000 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4001 | struct nfs4_ol_stateid, st_perstateowner); | |
4002 | return nfs_ok; | |
4003 | } | |
16bfdaaf | 4004 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4005 | &lock->v.new.owner); |
4006 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4007 | if (lo == NULL) | |
4008 | return nfserr_jukebox; | |
4009 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4010 | if (*lst == NULL) { | |
4011 | release_lockowner(lo); | |
4012 | return nfserr_jukebox; | |
4013 | } | |
4014 | *new = true; | |
4015 | return nfs_ok; | |
4016 | } | |
4017 | ||
1da177e4 LT |
4018 | /* |
4019 | * LOCK operation | |
4020 | */ | |
b37ad28b | 4021 | __be32 |
ca364317 | 4022 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4023 | struct nfsd4_lock *lock) |
1da177e4 | 4024 | { |
fe0750e5 BF |
4025 | struct nfs4_openowner *open_sop = NULL; |
4026 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4027 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4028 | struct file *filp = NULL; |
1da177e4 | 4029 | struct file_lock file_lock; |
8dc7c311 | 4030 | struct file_lock conflock; |
b37ad28b | 4031 | __be32 status = 0; |
64a284d0 | 4032 | bool new_state = false; |
b34f27aa | 4033 | int lkflg; |
b8dd7b9a | 4034 | int err; |
1da177e4 LT |
4035 | |
4036 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4037 | (long long) lock->lk_offset, | |
4038 | (long long) lock->lk_length); | |
4039 | ||
1da177e4 LT |
4040 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4041 | return nfserr_inval; | |
4042 | ||
ca364317 | 4043 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4044 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4045 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4046 | return status; | |
4047 | } | |
4048 | ||
1da177e4 LT |
4049 | nfs4_lock_state(); |
4050 | ||
4051 | if (lock->lk_is_new) { | |
893f8770 N |
4052 | /* |
4053 | * Client indicates that this is a new lockowner. | |
4054 | * Use open owner and open stateid to create lock owner and | |
4055 | * lock stateid. | |
4056 | */ | |
dcef0413 | 4057 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4058 | |
4059 | if (nfsd4_has_session(cstate)) | |
4060 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4061 | memcpy(&lock->v.new.clientid, | |
4062 | &cstate->session->se_client->cl_clientid, | |
4063 | sizeof(clientid_t)); | |
4064 | ||
1da177e4 | 4065 | status = nfserr_stale_clientid; |
684e5638 | 4066 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4067 | goto out; |
1da177e4 | 4068 | |
1da177e4 | 4069 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4070 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4071 | lock->lk_new_open_seqid, |
4072 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4073 | &open_stp); |
37515177 | 4074 | if (status) |
1da177e4 | 4075 | goto out; |
fe0750e5 | 4076 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4077 | status = nfserr_bad_stateid; |
684e5638 | 4078 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4079 | &lock->v.new.clientid)) |
4080 | goto out; | |
64a284d0 BF |
4081 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4082 | &lock_stp, &new_state); | |
4083 | if (status) | |
1da177e4 | 4084 | goto out; |
1da177e4 LT |
4085 | } else { |
4086 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4087 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4088 | lock->lk_old_lock_seqid, |
4089 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4090 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4091 | if (status) |
4092 | goto out; | |
4093 | } | |
64a284d0 | 4094 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4095 | |
b34f27aa BF |
4096 | lkflg = setlkflg(lock->lk_type); |
4097 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4098 | if (status) | |
4099 | goto out; | |
4100 | ||
0dd395dc | 4101 | status = nfserr_grace; |
af558e33 | 4102 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4103 | goto out; |
4104 | status = nfserr_no_grace; | |
af558e33 | 4105 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4106 | goto out; |
4107 | ||
1da177e4 LT |
4108 | locks_init_lock(&file_lock); |
4109 | switch (lock->lk_type) { | |
4110 | case NFS4_READ_LT: | |
4111 | case NFS4_READW_LT: | |
0997b173 BF |
4112 | filp = find_readable_file(lock_stp->st_file); |
4113 | if (filp) | |
4114 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4115 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4116 | break; |
1da177e4 LT |
4117 | case NFS4_WRITE_LT: |
4118 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4119 | filp = find_writeable_file(lock_stp->st_file); |
4120 | if (filp) | |
4121 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4122 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4123 | break; |
1da177e4 LT |
4124 | default: |
4125 | status = nfserr_inval; | |
4126 | goto out; | |
4127 | } | |
f9d7562f BF |
4128 | if (!filp) { |
4129 | status = nfserr_openmode; | |
4130 | goto out; | |
4131 | } | |
b59e3c0e | 4132 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4133 | file_lock.fl_pid = current->tgid; |
4134 | file_lock.fl_file = filp; | |
4135 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4136 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4137 | |
4138 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4139 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4140 | nfs4_transform_lock_offset(&file_lock); |
4141 | ||
4142 | /* | |
4143 | * Try to lock the file in the VFS. | |
4144 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4145 | */ | |
4146 | ||
529d7b2a | 4147 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4148 | switch (-err) { |
1da177e4 | 4149 | case 0: /* success! */ |
dcef0413 BF |
4150 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4151 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4152 | sizeof(stateid_t)); |
b8dd7b9a | 4153 | status = 0; |
eb76b3fd AA |
4154 | break; |
4155 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4156 | status = nfserr_denied; | |
4157 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4158 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4159 | break; | |
1da177e4 LT |
4160 | case (EDEADLK): |
4161 | status = nfserr_deadlock; | |
eb76b3fd | 4162 | break; |
3e772463 | 4163 | default: |
fd85b817 | 4164 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4165 | status = nfserrno(err); |
eb76b3fd | 4166 | break; |
1da177e4 | 4167 | } |
1da177e4 | 4168 | out: |
64a284d0 | 4169 | if (status && new_state) |
f044ff83 | 4170 | release_lockowner(lock_sop); |
5ec094c1 BF |
4171 | if (!cstate->replay_owner) |
4172 | nfs4_unlock_state(); | |
1da177e4 LT |
4173 | return status; |
4174 | } | |
4175 | ||
55ef1274 BF |
4176 | /* |
4177 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4178 | * so we do a temporary open here just to get an open file to pass to | |
4179 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4180 | * inode operation.) | |
4181 | */ | |
04da6e9d | 4182 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 BF |
4183 | { |
4184 | struct file *file; | |
04da6e9d AV |
4185 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
4186 | if (!err) { | |
4187 | err = nfserrno(vfs_test_lock(file, lock)); | |
4188 | nfsd_close(file); | |
4189 | } | |
55ef1274 BF |
4190 | return err; |
4191 | } | |
4192 | ||
1da177e4 LT |
4193 | /* |
4194 | * LOCKT operation | |
4195 | */ | |
b37ad28b | 4196 | __be32 |
ca364317 BF |
4197 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4198 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4199 | { |
4200 | struct inode *inode; | |
1da177e4 | 4201 | struct file_lock file_lock; |
fe0750e5 | 4202 | struct nfs4_lockowner *lo; |
b37ad28b | 4203 | __be32 status; |
1da177e4 | 4204 | |
af558e33 | 4205 | if (locks_in_grace()) |
1da177e4 LT |
4206 | return nfserr_grace; |
4207 | ||
4208 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4209 | return nfserr_inval; | |
4210 | ||
1da177e4 LT |
4211 | nfs4_lock_state(); |
4212 | ||
4213 | status = nfserr_stale_clientid; | |
60adfc50 | 4214 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4215 | goto out; |
1da177e4 | 4216 | |
75c096f7 | 4217 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4218 | goto out; |
1da177e4 | 4219 | |
ca364317 | 4220 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4221 | locks_init_lock(&file_lock); |
4222 | switch (lockt->lt_type) { | |
4223 | case NFS4_READ_LT: | |
4224 | case NFS4_READW_LT: | |
4225 | file_lock.fl_type = F_RDLCK; | |
4226 | break; | |
4227 | case NFS4_WRITE_LT: | |
4228 | case NFS4_WRITEW_LT: | |
4229 | file_lock.fl_type = F_WRLCK; | |
4230 | break; | |
4231 | default: | |
2fdada03 | 4232 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4233 | status = nfserr_inval; |
4234 | goto out; | |
4235 | } | |
4236 | ||
fe0750e5 BF |
4237 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4238 | if (lo) | |
4239 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4240 | file_lock.fl_pid = current->tgid; |
4241 | file_lock.fl_flags = FL_POSIX; | |
4242 | ||
4243 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4244 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4245 | |
4246 | nfs4_transform_lock_offset(&file_lock); | |
4247 | ||
04da6e9d AV |
4248 | status = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
4249 | if (status) | |
fd85b817 | 4250 | goto out; |
04da6e9d | 4251 | |
9d6a8c5c | 4252 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4253 | status = nfserr_denied; |
9d6a8c5c | 4254 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4255 | } |
4256 | out: | |
4257 | nfs4_unlock_state(); | |
4258 | return status; | |
4259 | } | |
4260 | ||
b37ad28b | 4261 | __be32 |
ca364317 | 4262 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4263 | struct nfsd4_locku *locku) |
1da177e4 | 4264 | { |
dcef0413 | 4265 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4266 | struct file *filp = NULL; |
4267 | struct file_lock file_lock; | |
b37ad28b | 4268 | __be32 status; |
b8dd7b9a | 4269 | int err; |
1da177e4 LT |
4270 | |
4271 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4272 | (long long) locku->lu_offset, | |
4273 | (long long) locku->lu_length); | |
4274 | ||
4275 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4276 | return nfserr_inval; | |
4277 | ||
4278 | nfs4_lock_state(); | |
4279 | ||
9072d5c6 | 4280 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4281 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4282 | if (status) |
1da177e4 | 4283 | goto out; |
f9d7562f BF |
4284 | filp = find_any_file(stp->st_file); |
4285 | if (!filp) { | |
4286 | status = nfserr_lock_range; | |
4287 | goto out; | |
4288 | } | |
1da177e4 LT |
4289 | BUG_ON(!filp); |
4290 | locks_init_lock(&file_lock); | |
4291 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4292 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4293 | file_lock.fl_pid = current->tgid; |
4294 | file_lock.fl_file = filp; | |
4295 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4296 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4297 | file_lock.fl_start = locku->lu_offset; |
4298 | ||
87df4de8 | 4299 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4300 | nfs4_transform_lock_offset(&file_lock); |
4301 | ||
4302 | /* | |
4303 | * Try to unlock the file in the VFS. | |
4304 | */ | |
fd85b817 | 4305 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4306 | if (err) { |
fd85b817 | 4307 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4308 | goto out_nfserr; |
4309 | } | |
4310 | /* | |
4311 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4312 | */ | |
dcef0413 BF |
4313 | update_stateid(&stp->st_stid.sc_stateid); |
4314 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4315 | |
4316 | out: | |
71c3bcd7 BF |
4317 | if (!cstate->replay_owner) |
4318 | nfs4_unlock_state(); | |
1da177e4 LT |
4319 | return status; |
4320 | ||
4321 | out_nfserr: | |
b8dd7b9a | 4322 | status = nfserrno(err); |
1da177e4 LT |
4323 | goto out; |
4324 | } | |
4325 | ||
4326 | /* | |
4327 | * returns | |
4328 | * 1: locks held by lockowner | |
4329 | * 0: no locks held by lockowner | |
4330 | */ | |
4331 | static int | |
fe0750e5 | 4332 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4333 | { |
4334 | struct file_lock **flpp; | |
f9d7562f | 4335 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4336 | int status = 0; |
4337 | ||
b89f4321 | 4338 | lock_flocks(); |
1da177e4 | 4339 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4340 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4341 | status = 1; |
4342 | goto out; | |
796dadfd | 4343 | } |
1da177e4 LT |
4344 | } |
4345 | out: | |
b89f4321 | 4346 | unlock_flocks(); |
1da177e4 LT |
4347 | return status; |
4348 | } | |
4349 | ||
b37ad28b | 4350 | __be32 |
b591480b BF |
4351 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4352 | struct nfsd4_compound_state *cstate, | |
4353 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4354 | { |
4355 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4356 | struct nfs4_stateowner *sop; |
fe0750e5 | 4357 | struct nfs4_lockowner *lo; |
dcef0413 | 4358 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4359 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4360 | struct list_head matches; |
16bfdaaf | 4361 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4362 | __be32 status; |
1da177e4 LT |
4363 | |
4364 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4365 | clid->cl_boot, clid->cl_id); | |
4366 | ||
4367 | /* XXX check for lease expiration */ | |
4368 | ||
4369 | status = nfserr_stale_clientid; | |
849823c5 | 4370 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4371 | return status; |
1da177e4 LT |
4372 | |
4373 | nfs4_lock_state(); | |
4374 | ||
3e9e3dbe | 4375 | status = nfserr_locks_held; |
3e9e3dbe | 4376 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4377 | |
16bfdaaf BF |
4378 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4379 | if (sop->so_is_open_owner) | |
4380 | continue; | |
06f1f864 BF |
4381 | if (!same_owner_str(sop, owner, clid)) |
4382 | continue; | |
4383 | list_for_each_entry(stp, &sop->so_stateids, | |
4384 | st_perstateowner) { | |
4385 | lo = lockowner(sop); | |
4386 | if (check_for_locks(stp->st_file, lo)) | |
4387 | goto out; | |
4388 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4389 | } |
3e9e3dbe N |
4390 | } |
4391 | /* Clients probably won't expect us to return with some (but not all) | |
4392 | * of the lockowner state released; so don't release any until all | |
4393 | * have been checked. */ | |
4394 | status = nfs_ok; | |
0fa822e4 | 4395 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4396 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4397 | lo_list); | |
0fa822e4 N |
4398 | /* unhash_stateowner deletes so_perclient only |
4399 | * for openowners. */ | |
fe0750e5 BF |
4400 | list_del(&lo->lo_list); |
4401 | release_lockowner(lo); | |
1da177e4 LT |
4402 | } |
4403 | out: | |
4404 | nfs4_unlock_state(); | |
4405 | return status; | |
4406 | } | |
4407 | ||
4408 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4409 | alloc_reclaim(void) |
1da177e4 | 4410 | { |
a55370a3 | 4411 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4412 | } |
4413 | ||
c7b9a459 | 4414 | int |
a1bcecd2 | 4415 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4416 | { |
4417 | unsigned int strhashval = clientstr_hashval(name); | |
4418 | struct nfs4_client *clp; | |
4419 | ||
e203d506 | 4420 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4421 | if (!clp) |
4422 | return 0; | |
a52d726b | 4423 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4424 | } |
4425 | ||
1da177e4 LT |
4426 | /* |
4427 | * failure => all reset bets are off, nfserr_no_grace... | |
4428 | */ | |
190e4fbf N |
4429 | int |
4430 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4431 | { |
4432 | unsigned int strhashval; | |
4433 | struct nfs4_client_reclaim *crp = NULL; | |
4434 | ||
a55370a3 N |
4435 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4436 | crp = alloc_reclaim(); | |
1da177e4 LT |
4437 | if (!crp) |
4438 | return 0; | |
a55370a3 | 4439 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4440 | INIT_LIST_HEAD(&crp->cr_strhash); |
4441 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4442 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4443 | reclaim_str_hashtbl_size++; |
4444 | return 1; | |
4445 | } | |
4446 | ||
2a4317c5 | 4447 | void |
1da177e4 LT |
4448 | nfs4_release_reclaim(void) |
4449 | { | |
4450 | struct nfs4_client_reclaim *crp = NULL; | |
4451 | int i; | |
4452 | ||
1da177e4 LT |
4453 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4454 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4455 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4456 | struct nfs4_client_reclaim, cr_strhash); | |
4457 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4458 | kfree(crp); |
4459 | reclaim_str_hashtbl_size--; | |
4460 | } | |
4461 | } | |
4462 | BUG_ON(reclaim_str_hashtbl_size); | |
4463 | } | |
4464 | ||
4465 | /* | |
4466 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4467 | struct nfs4_client_reclaim * |
a52d726b | 4468 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4469 | { |
4470 | unsigned int strhashval; | |
1da177e4 LT |
4471 | struct nfs4_client_reclaim *crp = NULL; |
4472 | ||
a55370a3 N |
4473 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4474 | clp->cl_name.len, clp->cl_name.data, | |
4475 | clp->cl_recdir); | |
1da177e4 LT |
4476 | |
4477 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4478 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4479 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4480 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4481 | return crp; |
4482 | } | |
4483 | } | |
4484 | return NULL; | |
4485 | } | |
4486 | ||
4487 | /* | |
4488 | * Called from OPEN. Look for clientid in reclaim list. | |
4489 | */ | |
b37ad28b | 4490 | __be32 |
1da177e4 LT |
4491 | nfs4_check_open_reclaim(clientid_t *clid) |
4492 | { | |
a52d726b JL |
4493 | struct nfs4_client *clp; |
4494 | ||
4495 | /* find clientid in conf_id_hashtbl */ | |
4496 | clp = find_confirmed_client(clid); | |
4497 | if (clp == NULL) | |
4498 | return nfserr_reclaim_bad; | |
4499 | ||
4500 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4501 | } |
4502 | ||
65178db4 BS |
4503 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4504 | ||
4505 | void nfsd_forget_clients(u64 num) | |
4506 | { | |
4507 | struct nfs4_client *clp, *next; | |
4508 | int count = 0; | |
4509 | ||
4510 | nfs4_lock_state(); | |
4511 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4512 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4513 | expire_client(clp); |
4514 | if (++count == num) | |
4515 | break; | |
4516 | } | |
4517 | nfs4_unlock_state(); | |
4518 | ||
4519 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4520 | } | |
4521 | ||
4522 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4523 | { | |
4524 | release_lockowner(lockowner(sop)); | |
4525 | } | |
4526 | ||
4527 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4528 | { | |
4529 | release_openowner(openowner(sop)); | |
4530 | } | |
4531 | ||
353de31b | 4532 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4533 | void (*release_sop)(struct nfs4_stateowner *)) |
4534 | { | |
4535 | int i, count = 0; | |
4536 | struct nfs4_stateowner *sop, *next; | |
4537 | ||
16bfdaaf BF |
4538 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4539 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4540 | if (sop->so_is_open_owner != is_open_owner) | |
4541 | continue; | |
65178db4 BS |
4542 | release_sop(sop); |
4543 | if (++count == num) | |
4544 | return count; | |
4545 | } | |
4546 | } | |
4547 | return count; | |
4548 | } | |
4549 | ||
4550 | void nfsd_forget_locks(u64 num) | |
4551 | { | |
4552 | int count; | |
4553 | ||
4554 | nfs4_lock_state(); | |
16bfdaaf | 4555 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4556 | nfs4_unlock_state(); |
4557 | ||
4558 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4559 | } | |
4560 | ||
4561 | void nfsd_forget_openowners(u64 num) | |
4562 | { | |
4563 | int count; | |
4564 | ||
4565 | nfs4_lock_state(); | |
16bfdaaf | 4566 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4567 | nfs4_unlock_state(); |
4568 | ||
4569 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4570 | } | |
4571 | ||
4572 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4573 | { | |
4574 | int i, count = 0; | |
2d3475c0 BS |
4575 | struct nfs4_file *fp, *fnext; |
4576 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4577 | |
4578 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4579 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4580 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4581 | deleg_func(dp); |
4582 | if (++count == num) | |
4583 | return count; | |
4584 | } | |
4585 | } | |
4586 | } | |
2d3475c0 | 4587 | |
65178db4 BS |
4588 | return count; |
4589 | } | |
4590 | ||
4591 | void nfsd_forget_delegations(u64 num) | |
4592 | { | |
4593 | unsigned int count; | |
4594 | ||
4595 | nfs4_lock_state(); | |
4596 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4597 | nfs4_unlock_state(); | |
4598 | ||
4599 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4600 | } | |
4601 | ||
4602 | void nfsd_recall_delegations(u64 num) | |
4603 | { | |
4604 | unsigned int count; | |
4605 | ||
4606 | nfs4_lock_state(); | |
4607 | spin_lock(&recall_lock); | |
4608 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4609 | spin_unlock(&recall_lock); | |
4610 | nfs4_unlock_state(); | |
4611 | ||
4612 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4613 | } | |
4614 | ||
4615 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4616 | ||
ac4d8ff2 | 4617 | /* initialization to perform at module load time: */ |
1da177e4 | 4618 | |
72083396 | 4619 | void |
ac4d8ff2 | 4620 | nfs4_state_init(void) |
1da177e4 | 4621 | { |
72083396 | 4622 | int i; |
1da177e4 | 4623 | |
1da177e4 LT |
4624 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4625 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4626 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4627 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4628 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4629 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4630 | } |
5282fd72 ME |
4631 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4632 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4633 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4634 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4635 | } | |
16bfdaaf BF |
4636 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4637 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4638 | } |
009673b4 BF |
4639 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4640 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4641 | INIT_LIST_HEAD(&close_lru); |
4642 | INIT_LIST_HEAD(&client_lru); | |
4643 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4644 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4645 | } |
4646 | ||
c2f1a551 MS |
4647 | /* |
4648 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4649 | * client may quite reasonably hang on to a delegation as long as it has | |
4650 | * the inode cached. This becomes an obvious problem the first time a | |
4651 | * client's inode cache approaches the size of the server's total memory. | |
4652 | * | |
4653 | * For now we avoid this problem by imposing a hard limit on the number | |
4654 | * of delegations, which varies according to the server's memory size. | |
4655 | */ | |
4656 | static void | |
4657 | set_max_delegations(void) | |
4658 | { | |
4659 | /* | |
4660 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4661 | * estimates suggest that in the worst case (where every delegation | |
4662 | * is for a different inode), a delegation could take about 1.5K, | |
4663 | * giving a worst case usage of about 6% of memory. | |
4664 | */ | |
4665 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4666 | } | |
4667 | ||
ac4d8ff2 N |
4668 | /* initialization to perform when the nfsd service is started: */ |
4669 | ||
a6d6b781 JL |
4670 | int |
4671 | nfs4_state_start(void) | |
ac4d8ff2 | 4672 | { |
b5a1a81e BF |
4673 | int ret; |
4674 | ||
2a4317c5 JL |
4675 | /* |
4676 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4677 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4678 | * need to pass a net pointer into this function, take a reference | |
4679 | * to that instead and then do most of the rest of this on a per-net | |
4680 | * basis. | |
4681 | */ | |
4682 | get_net(&init_net); | |
4683 | nfsd4_client_tracking_init(&init_net); | |
1da177e4 | 4684 | boot_time = get_seconds(); |
af558e33 | 4685 | locks_start_grace(&nfsd4_manager); |
33dcc481 | 4686 | grace_ended = false; |
9a8db97e | 4687 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4688 | nfsd4_grace); |
b5a1a81e | 4689 | ret = set_callback_cred(); |
a6d6b781 JL |
4690 | if (ret) { |
4691 | ret = -ENOMEM; | |
4692 | goto out_recovery; | |
4693 | } | |
58da282b | 4694 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4695 | if (laundry_wq == NULL) { |
4696 | ret = -ENOMEM; | |
4697 | goto out_recovery; | |
4698 | } | |
b5a1a81e BF |
4699 | ret = nfsd4_create_callback_queue(); |
4700 | if (ret) | |
4701 | goto out_free_laundry; | |
e46b498c | 4702 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4703 | set_max_delegations(); |
b5a1a81e BF |
4704 | return 0; |
4705 | out_free_laundry: | |
4706 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4707 | out_recovery: |
2a4317c5 JL |
4708 | nfsd4_client_tracking_exit(&init_net); |
4709 | put_net(&init_net); | |
b5a1a81e | 4710 | return ret; |
1da177e4 LT |
4711 | } |
4712 | ||
1da177e4 LT |
4713 | static void |
4714 | __nfs4_state_shutdown(void) | |
4715 | { | |
4716 | int i; | |
4717 | struct nfs4_client *clp = NULL; | |
4718 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4719 | struct list_head *pos, *next, reaplist; |
4720 | ||
1da177e4 LT |
4721 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4722 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4723 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4724 | expire_client(clp); | |
4725 | } | |
4726 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4727 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4728 | expire_client(clp); | |
4729 | } | |
4730 | } | |
4731 | INIT_LIST_HEAD(&reaplist); | |
4732 | spin_lock(&recall_lock); | |
4733 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4734 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4735 | list_move(&dp->dl_recall_lru, &reaplist); | |
4736 | } | |
4737 | spin_unlock(&recall_lock); | |
4738 | list_for_each_safe(pos, next, &reaplist) { | |
4739 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4740 | unhash_delegation(dp); |
4741 | } | |
4742 | ||
2a4317c5 JL |
4743 | nfsd4_client_tracking_exit(&init_net); |
4744 | put_net(&init_net); | |
1da177e4 LT |
4745 | } |
4746 | ||
4747 | void | |
4748 | nfs4_state_shutdown(void) | |
4749 | { | |
afe2c511 | 4750 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4751 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4752 | locks_end_grace(&nfsd4_manager); |
1da177e4 | 4753 | nfs4_lock_state(); |
1da177e4 | 4754 | __nfs4_state_shutdown(); |
1da177e4 | 4755 | nfs4_unlock_state(); |
c3935e30 | 4756 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4757 | } |
8b70484c TM |
4758 | |
4759 | static void | |
4760 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4761 | { | |
37c593c5 TM |
4762 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4763 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4764 | } |
4765 | ||
4766 | static void | |
4767 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4768 | { | |
37c593c5 TM |
4769 | if (cstate->minorversion) { |
4770 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4771 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4772 | } | |
4773 | } | |
4774 | ||
4775 | void | |
4776 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4777 | { | |
4778 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4779 | } |
4780 | ||
62cd4a59 TM |
4781 | /* |
4782 | * functions to set current state id | |
4783 | */ | |
9428fe1a TM |
4784 | void |
4785 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4786 | { | |
4787 | put_stateid(cstate, &odp->od_stateid); | |
4788 | } | |
4789 | ||
8b70484c TM |
4790 | void |
4791 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4792 | { | |
4793 | put_stateid(cstate, &open->op_stateid); | |
4794 | } | |
4795 | ||
62cd4a59 TM |
4796 | void |
4797 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4798 | { | |
4799 | put_stateid(cstate, &close->cl_stateid); | |
4800 | } | |
4801 | ||
4802 | void | |
4803 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4804 | { | |
4805 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4806 | } | |
4807 | ||
4808 | /* | |
4809 | * functions to consume current state id | |
4810 | */ | |
1e97b519 | 4811 | |
9428fe1a TM |
4812 | void |
4813 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4814 | { | |
4815 | get_stateid(cstate, &odp->od_stateid); | |
4816 | } | |
4817 | ||
4818 | void | |
4819 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4820 | { | |
4821 | get_stateid(cstate, &drp->dr_stateid); | |
4822 | } | |
4823 | ||
1e97b519 TM |
4824 | void |
4825 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4826 | { | |
4827 | get_stateid(cstate, &fsp->fr_stateid); | |
4828 | } | |
4829 | ||
4830 | void | |
4831 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4832 | { | |
4833 | get_stateid(cstate, &setattr->sa_stateid); | |
4834 | } | |
4835 | ||
8b70484c TM |
4836 | void |
4837 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4838 | { | |
4839 | get_stateid(cstate, &close->cl_stateid); | |
4840 | } | |
4841 | ||
4842 | void | |
62cd4a59 | 4843 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4844 | { |
62cd4a59 | 4845 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4846 | } |
30813e27 TM |
4847 | |
4848 | void | |
4849 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4850 | { | |
4851 | get_stateid(cstate, &read->rd_stateid); | |
4852 | } | |
4853 | ||
4854 | void | |
4855 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4856 | { | |
4857 | get_stateid(cstate, &write->wr_stateid); | |
4858 | } |