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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 | ||
474 | static int nfs4_access_to_omode(u32 access) | |
475 | { | |
8f34a430 | 476 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
477 | case NFS4_SHARE_ACCESS_READ: |
478 | return O_RDONLY; | |
479 | case NFS4_SHARE_ACCESS_WRITE: | |
480 | return O_WRONLY; | |
481 | case NFS4_SHARE_ACCESS_BOTH: | |
482 | return O_RDWR; | |
483 | } | |
484 | BUG(); | |
485 | } | |
486 | ||
dcef0413 | 487 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 488 | { |
529d7b2a BF |
489 | list_del(&stp->st_perfile); |
490 | list_del(&stp->st_perstateowner); | |
491 | } | |
492 | ||
dcef0413 | 493 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 494 | { |
499f3edc | 495 | int i; |
0997b173 | 496 | |
23fcf2ec | 497 | if (stp->st_access_bmap) { |
499f3edc BF |
498 | for (i = 1; i < 4; i++) { |
499 | if (test_bit(i, &stp->st_access_bmap)) | |
500 | nfs4_file_put_access(stp->st_file, | |
501 | nfs4_access_to_omode(i)); | |
4665e2ba | 502 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 503 | } |
23fcf2ec | 504 | } |
a96e5b90 | 505 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
506 | stp->st_file = NULL; |
507 | } | |
508 | ||
dcef0413 | 509 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 510 | { |
529d7b2a BF |
511 | kmem_cache_free(stateid_slab, stp); |
512 | } | |
513 | ||
dcef0413 | 514 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
515 | { |
516 | struct file *file; | |
517 | ||
518 | unhash_generic_stateid(stp); | |
6136d2b4 | 519 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
520 | file = find_any_file(stp->st_file); |
521 | if (file) | |
fe0750e5 | 522 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 523 | close_generic_stateid(stp); |
529d7b2a BF |
524 | free_generic_stateid(stp); |
525 | } | |
526 | ||
fe0750e5 | 527 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 528 | { |
dcef0413 | 529 | struct nfs4_ol_stateid *stp; |
529d7b2a | 530 | |
fe0750e5 BF |
531 | list_del(&lo->lo_owner.so_strhash); |
532 | list_del(&lo->lo_perstateid); | |
009673b4 | 533 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
534 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
535 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 536 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
537 | release_lock_stateid(stp); |
538 | } | |
539 | } | |
540 | ||
fe0750e5 | 541 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 542 | { |
fe0750e5 BF |
543 | unhash_lockowner(lo); |
544 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
545 | } |
546 | ||
547 | static void | |
dcef0413 | 548 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 549 | { |
fe0750e5 | 550 | struct nfs4_lockowner *lo; |
529d7b2a BF |
551 | |
552 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
553 | lo = list_entry(open_stp->st_lockowners.next, |
554 | struct nfs4_lockowner, lo_perstateid); | |
555 | release_lockowner(lo); | |
529d7b2a BF |
556 | } |
557 | } | |
558 | ||
38c387b5 | 559 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
560 | { |
561 | unhash_generic_stateid(stp); | |
562 | release_stateid_lockowners(stp); | |
38c387b5 BF |
563 | close_generic_stateid(stp); |
564 | } | |
565 | ||
566 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
567 | { | |
568 | unhash_open_stateid(stp); | |
6136d2b4 | 569 | unhash_stid(&stp->st_stid); |
2283963f BF |
570 | free_generic_stateid(stp); |
571 | } | |
572 | ||
fe0750e5 | 573 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 574 | { |
dcef0413 | 575 | struct nfs4_ol_stateid *stp; |
f1d110ca | 576 | |
fe0750e5 BF |
577 | list_del(&oo->oo_owner.so_strhash); |
578 | list_del(&oo->oo_perclient); | |
579 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
580 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 581 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 582 | release_open_stateid(stp); |
f1d110ca BF |
583 | } |
584 | } | |
585 | ||
f7a4d872 BF |
586 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
587 | { | |
588 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
589 | ||
590 | if (s) { | |
6136d2b4 | 591 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
592 | free_generic_stateid(s); |
593 | oo->oo_last_closed_stid = NULL; | |
594 | } | |
595 | } | |
596 | ||
fe0750e5 | 597 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 598 | { |
fe0750e5 BF |
599 | unhash_openowner(oo); |
600 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 601 | release_last_closed_stateid(oo); |
fe0750e5 | 602 | nfs4_free_openowner(oo); |
f1d110ca BF |
603 | } |
604 | ||
5282fd72 ME |
605 | #define SESSION_HASH_SIZE 512 |
606 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
607 | ||
608 | static inline int | |
609 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
610 | { | |
611 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
612 | ||
613 | return sid->sequence % SESSION_HASH_SIZE; | |
614 | } | |
615 | ||
8f199b82 | 616 | #ifdef NFSD_DEBUG |
5282fd72 ME |
617 | static inline void |
618 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
619 | { | |
620 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
621 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
622 | } | |
8f199b82 TM |
623 | #else |
624 | static inline void | |
625 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
626 | { | |
627 | } | |
628 | #endif | |
629 | ||
5282fd72 | 630 | |
ec6b5d7b AA |
631 | static void |
632 | gen_sessionid(struct nfsd4_session *ses) | |
633 | { | |
634 | struct nfs4_client *clp = ses->se_client; | |
635 | struct nfsd4_sessionid *sid; | |
636 | ||
637 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
638 | sid->clientid = clp->cl_clientid; | |
639 | sid->sequence = current_sessionid++; | |
640 | sid->reserved = 0; | |
641 | } | |
642 | ||
643 | /* | |
a649637c AA |
644 | * The protocol defines ca_maxresponssize_cached to include the size of |
645 | * the rpc header, but all we need to cache is the data starting after | |
646 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
647 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
648 | * value that is the number of bytes in our cache plus a few additional | |
649 | * bytes. In order to stay on the safe side, and not promise more than | |
650 | * we can cache, those additional bytes must be the minimum possible: 24 | |
651 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
652 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
653 | * for the SEQUENCE op response: | |
654 | */ | |
655 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
656 | ||
557ce264 AA |
657 | static void |
658 | free_session_slots(struct nfsd4_session *ses) | |
659 | { | |
660 | int i; | |
661 | ||
662 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
663 | kfree(ses->se_slots[i]); | |
664 | } | |
665 | ||
a649637c | 666 | /* |
efe0cb6d BF |
667 | * We don't actually need to cache the rpc and session headers, so we |
668 | * can allocate a little less for each slot: | |
669 | */ | |
670 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
671 | { | |
672 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
673 | } | |
674 | ||
5b6feee9 | 675 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 676 | { |
5b6feee9 BF |
677 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
678 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 679 | |
5b6feee9 BF |
680 | return size; |
681 | } | |
ec6b5d7b | 682 | |
5b6feee9 BF |
683 | /* |
684 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 685 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 686 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 687 | */ |
5b6feee9 | 688 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 689 | { |
5b6feee9 | 690 | int avail; |
ec6b5d7b | 691 | |
5b6feee9 | 692 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 693 | |
5b6feee9 BF |
694 | spin_lock(&nfsd_drc_lock); |
695 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
696 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
697 | num = min_t(int, num, avail / slotsize); | |
698 | nfsd_drc_mem_used += num * slotsize; | |
699 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 700 | |
5b6feee9 BF |
701 | return num; |
702 | } | |
ec6b5d7b | 703 | |
5b6feee9 BF |
704 | static void nfsd4_put_drc_mem(int slotsize, int num) |
705 | { | |
4bd9b0f4 | 706 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 707 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 708 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 709 | } |
ec6b5d7b | 710 | |
5b6feee9 BF |
711 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
712 | { | |
713 | struct nfsd4_session *new; | |
714 | int mem, i; | |
a649637c | 715 | |
5b6feee9 BF |
716 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
717 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
718 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 719 | |
5b6feee9 BF |
720 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
721 | if (!new) | |
722 | return NULL; | |
557ce264 | 723 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
724 | for (i = 0; i < numslots; i++) { |
725 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
726 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
727 | if (!new->se_slots[i]) | |
557ce264 | 728 | goto out_free; |
557ce264 | 729 | } |
5b6feee9 BF |
730 | return new; |
731 | out_free: | |
732 | while (i--) | |
733 | kfree(new->se_slots[i]); | |
734 | kfree(new); | |
735 | return NULL; | |
ec6b5d7b AA |
736 | } |
737 | ||
5b6feee9 | 738 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 739 | { |
5b6feee9 | 740 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 741 | |
5b6feee9 | 742 | new->maxreqs = numslots; |
d2b21743 MJ |
743 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
744 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
745 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
746 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
747 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
748 | } | |
ec6b5d7b | 749 | |
19cf5c02 BF |
750 | static void free_conn(struct nfsd4_conn *c) |
751 | { | |
752 | svc_xprt_put(c->cn_xprt); | |
753 | kfree(c); | |
754 | } | |
ec6b5d7b | 755 | |
19cf5c02 BF |
756 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
757 | { | |
758 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
759 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 760 | |
19cf5c02 BF |
761 | spin_lock(&clp->cl_lock); |
762 | if (!list_empty(&c->cn_persession)) { | |
763 | list_del(&c->cn_persession); | |
764 | free_conn(c); | |
765 | } | |
766 | spin_unlock(&clp->cl_lock); | |
eea49806 | 767 | nfsd4_probe_callback(clp); |
19cf5c02 | 768 | } |
ec6b5d7b | 769 | |
d29c374c | 770 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 771 | { |
c7662518 | 772 | struct nfsd4_conn *conn; |
ec6b5d7b | 773 | |
c7662518 BF |
774 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
775 | if (!conn) | |
db90681d | 776 | return NULL; |
c7662518 BF |
777 | svc_xprt_get(rqstp->rq_xprt); |
778 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 779 | conn->cn_flags = flags; |
db90681d BF |
780 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
781 | return conn; | |
782 | } | |
a649637c | 783 | |
328ead28 BF |
784 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
785 | { | |
786 | conn->cn_session = ses; | |
787 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
788 | } |
789 | ||
db90681d | 790 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 791 | { |
db90681d | 792 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 793 | |
c7662518 | 794 | spin_lock(&clp->cl_lock); |
328ead28 | 795 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 796 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
797 | } |
798 | ||
21b75b01 | 799 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 800 | { |
19cf5c02 | 801 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 802 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
803 | } |
804 | ||
1d1bc8f2 | 805 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 806 | { |
db90681d | 807 | struct nfsd4_conn *conn; |
21b75b01 | 808 | int ret; |
ec6b5d7b | 809 | |
1d1bc8f2 | 810 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
811 | if (!conn) |
812 | return nfserr_jukebox; | |
813 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
814 | ret = nfsd4_register_conn(conn); |
815 | if (ret) | |
816 | /* oops; xprt is already down: */ | |
817 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
818 | return nfs_ok; |
819 | } | |
ec6b5d7b | 820 | |
1d1bc8f2 BF |
821 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
822 | { | |
823 | u32 dir = NFS4_CDFC4_FORE; | |
824 | ||
825 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
826 | dir |= NFS4_CDFC4_BACK; | |
827 | ||
828 | return nfsd4_new_conn(rqstp, ses, dir); | |
829 | } | |
830 | ||
831 | /* must be called under client_lock */ | |
19cf5c02 | 832 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 833 | { |
19cf5c02 BF |
834 | struct nfs4_client *clp = s->se_client; |
835 | struct nfsd4_conn *c; | |
ec6b5d7b | 836 | |
19cf5c02 BF |
837 | spin_lock(&clp->cl_lock); |
838 | while (!list_empty(&s->se_conns)) { | |
839 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
840 | list_del_init(&c->cn_persession); | |
841 | spin_unlock(&clp->cl_lock); | |
557ce264 | 842 | |
19cf5c02 BF |
843 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
844 | free_conn(c); | |
ec6b5d7b | 845 | |
19cf5c02 BF |
846 | spin_lock(&clp->cl_lock); |
847 | } | |
848 | spin_unlock(&clp->cl_lock); | |
c7662518 | 849 | } |
ec6b5d7b | 850 | |
508dc6e1 | 851 | static void free_session(struct kref *kref) |
c7662518 BF |
852 | { |
853 | struct nfsd4_session *ses; | |
854 | int mem; | |
855 | ||
508dc6e1 | 856 | BUG_ON(!spin_is_locked(&client_lock)); |
c7662518 | 857 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 858 | nfsd4_del_conns(ses); |
c7662518 BF |
859 | spin_lock(&nfsd_drc_lock); |
860 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
861 | nfsd_drc_mem_used -= mem; | |
862 | spin_unlock(&nfsd_drc_lock); | |
863 | free_session_slots(ses); | |
864 | kfree(ses); | |
865 | } | |
866 | ||
508dc6e1 BH |
867 | void nfsd4_put_session(struct nfsd4_session *ses) |
868 | { | |
869 | spin_lock(&client_lock); | |
870 | nfsd4_put_session_locked(ses); | |
871 | spin_unlock(&client_lock); | |
872 | } | |
873 | ||
ac7c46f2 | 874 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
875 | { |
876 | struct nfsd4_session *new; | |
877 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
878 | int numslots, slotsize; | |
57b7b43b | 879 | __be32 status; |
5b6feee9 BF |
880 | int idx; |
881 | ||
882 | /* | |
883 | * Note decreasing slot size below client's request may | |
884 | * make it difficult for client to function correctly, whereas | |
885 | * decreasing the number of slots will (just?) affect | |
886 | * performance. When short on memory we therefore prefer to | |
887 | * decrease number of slots instead of their size. | |
888 | */ | |
889 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
890 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
891 | if (numslots < 1) |
892 | return NULL; | |
5b6feee9 BF |
893 | |
894 | new = alloc_session(slotsize, numslots); | |
895 | if (!new) { | |
896 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 897 | return NULL; |
557ce264 | 898 | } |
5b6feee9 | 899 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 900 | |
ec6b5d7b AA |
901 | new->se_client = clp; |
902 | gen_sessionid(new); | |
ec6b5d7b | 903 | |
c7662518 BF |
904 | INIT_LIST_HEAD(&new->se_conns); |
905 | ||
ac7c46f2 | 906 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 907 | new->se_flags = cses->flags; |
8b5ce5cd | 908 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 909 | kref_init(&new->se_ref); |
5b6feee9 | 910 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 911 | spin_lock(&client_lock); |
ec6b5d7b | 912 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 913 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 914 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 915 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 916 | spin_unlock(&client_lock); |
ec6b5d7b | 917 | |
1d1bc8f2 | 918 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 919 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 920 | if (status) { |
508dc6e1 | 921 | spin_lock(&client_lock); |
c7662518 | 922 | free_session(&new->se_ref); |
508dc6e1 | 923 | spin_unlock(&client_lock); |
ac7c46f2 | 924 | return NULL; |
c7662518 | 925 | } |
dcbeaa68 | 926 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 927 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
928 | /* |
929 | * This is a little silly; with sessions there's no real | |
930 | * use for the callback address. Use the peer address | |
931 | * as a reasonable default for now, but consider fixing | |
932 | * the rpc client not to require an address in the | |
933 | * future: | |
934 | */ | |
edd76786 BF |
935 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
936 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 937 | } |
dcbeaa68 | 938 | nfsd4_probe_callback(clp); |
ac7c46f2 | 939 | return new; |
ec6b5d7b AA |
940 | } |
941 | ||
9089f1b4 | 942 | /* caller must hold client_lock */ |
5282fd72 ME |
943 | static struct nfsd4_session * |
944 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
945 | { | |
946 | struct nfsd4_session *elem; | |
947 | int idx; | |
948 | ||
949 | dump_sessionid(__func__, sessionid); | |
950 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
951 | /* Search in the appropriate list */ |
952 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
953 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
954 | NFS4_MAX_SESSIONID_LEN)) { | |
955 | return elem; | |
956 | } | |
957 | } | |
958 | ||
959 | dprintk("%s: session not found\n", __func__); | |
960 | return NULL; | |
961 | } | |
962 | ||
9089f1b4 | 963 | /* caller must hold client_lock */ |
7116ed6b | 964 | static void |
5282fd72 | 965 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
966 | { |
967 | list_del(&ses->se_hash); | |
4c649378 | 968 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 969 | list_del(&ses->se_perclnt); |
4c649378 | 970 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
971 | } |
972 | ||
36acb66b | 973 | /* must be called under the client_lock */ |
1da177e4 | 974 | static inline void |
36acb66b | 975 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 976 | { |
07cd4909 BH |
977 | if (is_client_expired(clp)) { |
978 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
979 | __func__, | |
980 | clp->cl_clientid.cl_boot, | |
981 | clp->cl_clientid.cl_id); | |
982 | return; | |
983 | } | |
984 | ||
1da177e4 LT |
985 | dprintk("renewing client (clientid %08x/%08x)\n", |
986 | clp->cl_clientid.cl_boot, | |
987 | clp->cl_clientid.cl_id); | |
988 | list_move_tail(&clp->cl_lru, &client_lru); | |
989 | clp->cl_time = get_seconds(); | |
990 | } | |
991 | ||
36acb66b BH |
992 | static inline void |
993 | renew_client(struct nfs4_client *clp) | |
994 | { | |
995 | spin_lock(&client_lock); | |
996 | renew_client_locked(clp); | |
997 | spin_unlock(&client_lock); | |
998 | } | |
999 | ||
1da177e4 LT |
1000 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1001 | static int | |
1002 | STALE_CLIENTID(clientid_t *clid) | |
1003 | { | |
1004 | if (clid->cl_boot == boot_time) | |
1005 | return 0; | |
60adfc50 AA |
1006 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
1007 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
1008 | return 1; |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * XXX Should we use a slab cache ? | |
1013 | * This type of memory management is somewhat inefficient, but we use it | |
1014 | * anyway since SETCLIENTID is not a common operation. | |
1015 | */ | |
35bba9a3 | 1016 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1017 | { |
1018 | struct nfs4_client *clp; | |
1019 | ||
35bba9a3 BF |
1020 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1021 | if (clp == NULL) | |
1022 | return NULL; | |
67114fe6 | 1023 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1024 | if (clp->cl_name.data == NULL) { |
1025 | kfree(clp); | |
1026 | return NULL; | |
1da177e4 | 1027 | } |
35bba9a3 | 1028 | clp->cl_name.len = name.len; |
1da177e4 LT |
1029 | return clp; |
1030 | } | |
1031 | ||
1032 | static inline void | |
1033 | free_client(struct nfs4_client *clp) | |
1034 | { | |
508dc6e1 | 1035 | BUG_ON(!spin_is_locked(&client_lock)); |
792c95dd BF |
1036 | while (!list_empty(&clp->cl_sessions)) { |
1037 | struct nfsd4_session *ses; | |
1038 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1039 | se_perclnt); | |
1040 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1041 | nfsd4_put_session_locked(ses); |
792c95dd | 1042 | } |
1da177e4 LT |
1043 | if (clp->cl_cred.cr_group_info) |
1044 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 1045 | kfree(clp->cl_principal); |
1da177e4 LT |
1046 | kfree(clp->cl_name.data); |
1047 | kfree(clp); | |
1048 | } | |
1049 | ||
d7682988 BH |
1050 | void |
1051 | release_session_client(struct nfsd4_session *session) | |
1052 | { | |
1053 | struct nfs4_client *clp = session->se_client; | |
1054 | ||
1055 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1056 | return; | |
1057 | if (is_client_expired(clp)) { | |
1058 | free_client(clp); | |
1059 | session->se_client = NULL; | |
1060 | } else | |
1061 | renew_client_locked(clp); | |
1062 | spin_unlock(&client_lock); | |
d7682988 BH |
1063 | } |
1064 | ||
84d38ac9 BH |
1065 | /* must be called under the client_lock */ |
1066 | static inline void | |
1067 | unhash_client_locked(struct nfs4_client *clp) | |
1068 | { | |
792c95dd BF |
1069 | struct nfsd4_session *ses; |
1070 | ||
07cd4909 | 1071 | mark_client_expired(clp); |
84d38ac9 | 1072 | list_del(&clp->cl_lru); |
4c649378 | 1073 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1074 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1075 | list_del_init(&ses->se_hash); | |
4c649378 | 1076 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1077 | } |
1078 | ||
1da177e4 LT |
1079 | static void |
1080 | expire_client(struct nfs4_client *clp) | |
1081 | { | |
fe0750e5 | 1082 | struct nfs4_openowner *oo; |
1da177e4 | 1083 | struct nfs4_delegation *dp; |
1da177e4 LT |
1084 | struct list_head reaplist; |
1085 | ||
1da177e4 LT |
1086 | INIT_LIST_HEAD(&reaplist); |
1087 | spin_lock(&recall_lock); | |
ea1da636 N |
1088 | while (!list_empty(&clp->cl_delegations)) { |
1089 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1090 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1091 | list_move(&dp->dl_recall_lru, &reaplist); |
1092 | } | |
1093 | spin_unlock(&recall_lock); | |
1094 | while (!list_empty(&reaplist)) { | |
1095 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1096 | unhash_delegation(dp); |
1097 | } | |
ea1da636 | 1098 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1099 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1100 | release_openowner(oo); | |
1da177e4 | 1101 | } |
6ff8da08 | 1102 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1103 | if (clp->cl_cb_conn.cb_xprt) |
1104 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1105 | list_del(&clp->cl_idhash); |
1106 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1107 | spin_lock(&client_lock); |
84d38ac9 | 1108 | unhash_client_locked(clp); |
46583e25 BH |
1109 | if (atomic_read(&clp->cl_refcount) == 0) |
1110 | free_client(clp); | |
be1fdf6c | 1111 | spin_unlock(&client_lock); |
1da177e4 LT |
1112 | } |
1113 | ||
35bba9a3 BF |
1114 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1115 | { | |
1116 | memcpy(target->cl_verifier.data, source->data, | |
1117 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1118 | } |
1119 | ||
35bba9a3 BF |
1120 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1121 | { | |
1da177e4 LT |
1122 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1123 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1124 | } | |
1125 | ||
35bba9a3 BF |
1126 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1127 | { | |
1da177e4 LT |
1128 | target->cr_uid = source->cr_uid; |
1129 | target->cr_gid = source->cr_gid; | |
1130 | target->cr_group_info = source->cr_group_info; | |
1131 | get_group_info(target->cr_group_info); | |
1132 | } | |
1133 | ||
35bba9a3 | 1134 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1135 | { |
a55370a3 | 1136 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | static int | |
599e0a22 BF |
1140 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1141 | { | |
1142 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | static int | |
599e0a22 BF |
1146 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1147 | { | |
1148 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1149 | } |
1150 | ||
1151 | /* XXX what about NGROUP */ | |
1152 | static int | |
599e0a22 BF |
1153 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1154 | { | |
1155 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1156 | } |
1157 | ||
5ec7b46c BF |
1158 | static void gen_clid(struct nfs4_client *clp) |
1159 | { | |
1160 | static u32 current_clientid = 1; | |
1161 | ||
1da177e4 LT |
1162 | clp->cl_clientid.cl_boot = boot_time; |
1163 | clp->cl_clientid.cl_id = current_clientid++; | |
1164 | } | |
1165 | ||
deda2faa BF |
1166 | static void gen_confirm(struct nfs4_client *clp) |
1167 | { | |
ab4684d1 | 1168 | __be32 verf[2]; |
deda2faa | 1169 | static u32 i; |
1da177e4 | 1170 | |
ab4684d1 CL |
1171 | verf[0] = (__be32)get_seconds(); |
1172 | verf[1] = (__be32)i++; | |
1173 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1174 | } |
1175 | ||
38c2f4b1 | 1176 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1177 | { |
38c2f4b1 | 1178 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1179 | } |
1180 | ||
38c2f4b1 | 1181 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1182 | { |
1183 | struct nfs4_stid *s; | |
4d71ab87 | 1184 | |
38c2f4b1 | 1185 | s = find_stateid(cl, t); |
4d71ab87 BF |
1186 | if (!s) |
1187 | return NULL; | |
f459e453 | 1188 | if (typemask & s->sc_type) |
4581d140 | 1189 | return s; |
4581d140 BF |
1190 | return NULL; |
1191 | } | |
1192 | ||
b09333c4 RL |
1193 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1194 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1195 | { | |
1196 | struct nfs4_client *clp; | |
1197 | struct sockaddr *sa = svc_addr(rqstp); | |
1198 | char *princ; | |
1199 | ||
1200 | clp = alloc_client(name); | |
1201 | if (clp == NULL) | |
1202 | return NULL; | |
1203 | ||
792c95dd BF |
1204 | INIT_LIST_HEAD(&clp->cl_sessions); |
1205 | ||
b09333c4 RL |
1206 | princ = svc_gss_principal(rqstp); |
1207 | if (princ) { | |
1208 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1209 | if (clp->cl_principal == NULL) { | |
508dc6e1 | 1210 | spin_lock(&client_lock); |
b09333c4 | 1211 | free_client(clp); |
508dc6e1 | 1212 | spin_unlock(&client_lock); |
b09333c4 RL |
1213 | return NULL; |
1214 | } | |
1215 | } | |
1216 | ||
38c2f4b1 | 1217 | idr_init(&clp->cl_stateids); |
b09333c4 | 1218 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1219 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1220 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1221 | INIT_LIST_HEAD(&clp->cl_idhash); |
1222 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1223 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1224 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1225 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1226 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1227 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1228 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1229 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1230 | clear_bit(0, &clp->cl_cb_slot_busy); |
1231 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1232 | copy_verf(clp, verf); | |
1233 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1234 | clp->cl_flavor = rqstp->rq_flavor; | |
1235 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1236 | gen_confirm(clp); | |
edd76786 | 1237 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1238 | return clp; |
1239 | } | |
1240 | ||
fd39ca9a | 1241 | static void |
1da177e4 LT |
1242 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1243 | { | |
1244 | unsigned int idhashval; | |
1245 | ||
1246 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1247 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1248 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1249 | renew_client(clp); |
1da177e4 LT |
1250 | } |
1251 | ||
fd39ca9a | 1252 | static void |
1da177e4 LT |
1253 | move_to_confirmed(struct nfs4_client *clp) |
1254 | { | |
1255 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1256 | unsigned int strhashval; | |
1257 | ||
1258 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1259 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1260 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1261 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1262 | renew_client(clp); |
1263 | } | |
1264 | ||
1265 | static struct nfs4_client * | |
1266 | find_confirmed_client(clientid_t *clid) | |
1267 | { | |
1268 | struct nfs4_client *clp; | |
1269 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1270 | ||
1271 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1272 | if (same_clid(&clp->cl_clientid, clid)) { |
1273 | renew_client(clp); | |
1da177e4 | 1274 | return clp; |
a50d2ad1 | 1275 | } |
1da177e4 LT |
1276 | } |
1277 | return NULL; | |
1278 | } | |
1279 | ||
1280 | static struct nfs4_client * | |
1281 | find_unconfirmed_client(clientid_t *clid) | |
1282 | { | |
1283 | struct nfs4_client *clp; | |
1284 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1285 | ||
1286 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1287 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1288 | return clp; |
1289 | } | |
1290 | return NULL; | |
1291 | } | |
1292 | ||
6e5f15c9 | 1293 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1294 | { |
6e5f15c9 | 1295 | return clp->cl_exchange_flags != 0; |
e203d506 | 1296 | } |
a1bcecd2 | 1297 | |
28ce6054 | 1298 | static struct nfs4_client * |
e203d506 | 1299 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1300 | { |
1301 | struct nfs4_client *clp; | |
1302 | ||
1303 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1304 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1305 | return clp; |
1306 | } | |
1307 | return NULL; | |
1308 | } | |
1309 | ||
1310 | static struct nfs4_client * | |
e203d506 | 1311 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1312 | { |
1313 | struct nfs4_client *clp; | |
1314 | ||
1315 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1316 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1317 | return clp; |
1318 | } | |
1319 | return NULL; | |
1320 | } | |
1321 | ||
fd39ca9a | 1322 | static void |
6f3d772f | 1323 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1324 | { |
07263f1e | 1325 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1326 | struct sockaddr *sa = svc_addr(rqstp); |
1327 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1328 | unsigned short expected_family; |
1329 | ||
1330 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1331 | if (se->se_callback_netid_len == 3 && | |
1332 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1333 | expected_family = AF_INET; | |
1334 | else if (se->se_callback_netid_len == 4 && | |
1335 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1336 | expected_family = AF_INET6; | |
1337 | else | |
1da177e4 LT |
1338 | goto out_err; |
1339 | ||
f2ac4dc9 | 1340 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1341 | se->se_callback_addr_len, |
07263f1e BF |
1342 | (struct sockaddr *)&conn->cb_addr, |
1343 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1344 | |
07263f1e | 1345 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1346 | goto out_err; |
aa9a4ec7 | 1347 | |
07263f1e BF |
1348 | if (conn->cb_addr.ss_family == AF_INET6) |
1349 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1350 | |
07263f1e BF |
1351 | conn->cb_prog = se->se_callback_prog; |
1352 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1353 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1354 | return; |
1355 | out_err: | |
07263f1e BF |
1356 | conn->cb_addr.ss_family = AF_UNSPEC; |
1357 | conn->cb_addrlen = 0; | |
849823c5 | 1358 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1359 | "will not receive delegations\n", |
1360 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1361 | ||
1da177e4 LT |
1362 | return; |
1363 | } | |
1364 | ||
074fe897 | 1365 | /* |
557ce264 | 1366 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1367 | */ |
074fe897 AA |
1368 | void |
1369 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1370 | { |
557ce264 AA |
1371 | struct nfsd4_slot *slot = resp->cstate.slot; |
1372 | unsigned int base; | |
074fe897 | 1373 | |
557ce264 | 1374 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1375 | |
557ce264 AA |
1376 | slot->sl_opcnt = resp->opcnt; |
1377 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1378 | |
bf5c43c8 | 1379 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1380 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1381 | slot->sl_datalen = 0; |
bf864a31 | 1382 | return; |
074fe897 | 1383 | } |
557ce264 AA |
1384 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1385 | base = (char *)resp->cstate.datap - | |
1386 | (char *)resp->xbuf->head[0].iov_base; | |
1387 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1388 | slot->sl_datalen)) | |
1389 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1390 | return; | |
074fe897 AA |
1391 | } |
1392 | ||
1393 | /* | |
abfabf8c AA |
1394 | * Encode the replay sequence operation from the slot values. |
1395 | * If cachethis is FALSE encode the uncached rep error on the next | |
1396 | * operation which sets resp->p and increments resp->opcnt for | |
1397 | * nfs4svc_encode_compoundres. | |
074fe897 | 1398 | * |
074fe897 | 1399 | */ |
abfabf8c AA |
1400 | static __be32 |
1401 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1402 | struct nfsd4_compoundres *resp) | |
074fe897 | 1403 | { |
abfabf8c AA |
1404 | struct nfsd4_op *op; |
1405 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1406 | |
abfabf8c AA |
1407 | /* Encode the replayed sequence operation */ |
1408 | op = &args->ops[resp->opcnt - 1]; | |
1409 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1410 | |
abfabf8c | 1411 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1412 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1413 | op = &args->ops[resp->opcnt++]; |
1414 | op->status = nfserr_retry_uncached_rep; | |
1415 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1416 | } |
abfabf8c | 1417 | return op->status; |
074fe897 AA |
1418 | } |
1419 | ||
1420 | /* | |
557ce264 AA |
1421 | * The sequence operation is not cached because we can use the slot and |
1422 | * session values. | |
074fe897 AA |
1423 | */ |
1424 | __be32 | |
bf864a31 AA |
1425 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1426 | struct nfsd4_sequence *seq) | |
074fe897 | 1427 | { |
557ce264 | 1428 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1429 | __be32 status; |
1430 | ||
557ce264 | 1431 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1432 | |
abfabf8c AA |
1433 | /* Either returns 0 or nfserr_retry_uncached */ |
1434 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1435 | if (status == nfserr_retry_uncached_rep) | |
1436 | return status; | |
074fe897 | 1437 | |
557ce264 AA |
1438 | /* The sequence operation has been encoded, cstate->datap set. */ |
1439 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1440 | |
557ce264 AA |
1441 | resp->opcnt = slot->sl_opcnt; |
1442 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1443 | status = slot->sl_status; | |
074fe897 AA |
1444 | |
1445 | return status; | |
1446 | } | |
1447 | ||
0733d213 AA |
1448 | /* |
1449 | * Set the exchange_id flags returned by the server. | |
1450 | */ | |
1451 | static void | |
1452 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1453 | { | |
1454 | /* pNFS is not supported */ | |
1455 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1456 | ||
1457 | /* Referrals are supported, Migration is not. */ | |
1458 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1459 | ||
1460 | /* set the wire flags to return to client. */ | |
1461 | clid->flags = new->cl_exchange_flags; | |
1462 | } | |
1463 | ||
069b6ad4 AA |
1464 | __be32 |
1465 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1466 | struct nfsd4_compound_state *cstate, | |
1467 | struct nfsd4_exchange_id *exid) | |
1468 | { | |
0733d213 | 1469 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1470 | __be32 status; |
0733d213 AA |
1471 | unsigned int strhashval; |
1472 | char dname[HEXDIR_LEN]; | |
363168b4 | 1473 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1474 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1475 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1476 | |
363168b4 | 1477 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1478 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1479 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1480 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1481 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1482 | |
a084daf5 | 1483 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1484 | return nfserr_inval; |
1485 | ||
1486 | /* Currently only support SP4_NONE */ | |
1487 | switch (exid->spa_how) { | |
1488 | case SP4_NONE: | |
1489 | break; | |
1490 | case SP4_SSV: | |
044bc1d4 | 1491 | return nfserr_serverfault; |
0733d213 AA |
1492 | default: |
1493 | BUG(); /* checked by xdr code */ | |
1494 | case SP4_MACH_CRED: | |
1495 | return nfserr_serverfault; /* no excuse :-/ */ | |
1496 | } | |
1497 | ||
1498 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1499 | ||
1500 | if (status) | |
1501 | goto error; | |
1502 | ||
1503 | strhashval = clientstr_hashval(dname); | |
1504 | ||
1505 | nfs4_lock_state(); | |
1506 | status = nfs_ok; | |
1507 | ||
e203d506 | 1508 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1509 | if (conf) { |
e203d506 BF |
1510 | if (!clp_used_exchangeid(conf)) { |
1511 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1512 | goto out; | |
1513 | } | |
0733d213 AA |
1514 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1515 | /* 18.35.4 case 8 */ | |
1516 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1517 | status = nfserr_not_same; | |
1518 | goto out; | |
1519 | } | |
1520 | /* Client reboot: destroy old state */ | |
1521 | expire_client(conf); | |
1522 | goto out_new; | |
1523 | } | |
1524 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1525 | /* 18.35.4 case 9 */ | |
1526 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1527 | status = nfserr_perm; | |
1528 | goto out; | |
1529 | } | |
1530 | expire_client(conf); | |
1531 | goto out_new; | |
1532 | } | |
0733d213 AA |
1533 | /* |
1534 | * Set bit when the owner id and verifier map to an already | |
1535 | * confirmed client id (18.35.3). | |
1536 | */ | |
1537 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1538 | ||
1539 | /* | |
1540 | * Falling into 18.35.4 case 2, possible router replay. | |
1541 | * Leave confirmed record intact and return same result. | |
1542 | */ | |
1543 | copy_verf(conf, &verf); | |
1544 | new = conf; | |
1545 | goto out_copy; | |
6ddbbbfe MS |
1546 | } |
1547 | ||
1548 | /* 18.35.4 case 7 */ | |
1549 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1550 | status = nfserr_noent; | |
1551 | goto out; | |
0733d213 AA |
1552 | } |
1553 | ||
e203d506 | 1554 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1555 | if (unconf) { |
1556 | /* | |
1557 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1558 | * a new unconfirmed record should be generated regardless | |
1559 | * of whether any properties have changed. | |
1560 | */ | |
1561 | expire_client(unconf); | |
1562 | } | |
1563 | ||
1564 | out_new: | |
1565 | /* Normal case */ | |
b09333c4 | 1566 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1567 | if (new == NULL) { |
4731030d | 1568 | status = nfserr_jukebox; |
0733d213 AA |
1569 | goto out; |
1570 | } | |
1571 | ||
0733d213 | 1572 | gen_clid(new); |
0733d213 AA |
1573 | add_to_unconfirmed(new, strhashval); |
1574 | out_copy: | |
1575 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1576 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1577 | ||
38eb76a5 | 1578 | exid->seqid = 1; |
0733d213 AA |
1579 | nfsd4_set_ex_flags(new, exid); |
1580 | ||
1581 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1582 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1583 | status = nfs_ok; |
1584 | ||
1585 | out: | |
1586 | nfs4_unlock_state(); | |
1587 | error: | |
1588 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1589 | return status; | |
069b6ad4 AA |
1590 | } |
1591 | ||
57b7b43b | 1592 | static __be32 |
88e588d5 | 1593 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1594 | { |
88e588d5 AA |
1595 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1596 | slot_seqid); | |
b85d4c01 BH |
1597 | |
1598 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1599 | if (slot_inuse) { |
1600 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1601 | return nfserr_jukebox; |
1602 | else | |
1603 | return nfserr_seq_misordered; | |
1604 | } | |
f6d82485 | 1605 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1606 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1607 | return nfs_ok; |
88e588d5 | 1608 | if (seqid == slot_seqid) |
b85d4c01 | 1609 | return nfserr_replay_cache; |
b85d4c01 BH |
1610 | return nfserr_seq_misordered; |
1611 | } | |
1612 | ||
49557cc7 AA |
1613 | /* |
1614 | * Cache the create session result into the create session single DRC | |
1615 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1616 | * Do this for solo or embedded create session operations. | |
1617 | */ | |
1618 | static void | |
1619 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1620 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1621 | { |
1622 | slot->sl_status = nfserr; | |
1623 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1624 | } | |
1625 | ||
1626 | static __be32 | |
1627 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1628 | struct nfsd4_clid_slot *slot) | |
1629 | { | |
1630 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1631 | return slot->sl_status; | |
1632 | } | |
1633 | ||
1b74c25b MJ |
1634 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1635 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1636 | 1 + /* MIN tag is length with zero, only length */ \ | |
1637 | 3 + /* version, opcount, opcode */ \ | |
1638 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1639 | /* seqid, slotID, slotID, cache */ \ | |
1640 | 4 ) * sizeof(__be32)) | |
1641 | ||
1642 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1643 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1644 | 1 + /* status */ \ | |
1645 | 1 + /* MIN tag is length with zero, only length */ \ | |
1646 | 3 + /* opcount, opcode, opstatus*/ \ | |
1647 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1648 | /* seqid, slotID, slotID, slotID, status */ \ | |
1649 | 5 ) * sizeof(__be32)) | |
1650 | ||
57b7b43b | 1651 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1652 | { |
1653 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1654 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1655 | } | |
1656 | ||
069b6ad4 AA |
1657 | __be32 |
1658 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1659 | struct nfsd4_compound_state *cstate, | |
1660 | struct nfsd4_create_session *cr_ses) | |
1661 | { | |
363168b4 | 1662 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1663 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1664 | struct nfsd4_session *new; |
49557cc7 | 1665 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1666 | bool confirm_me = false; |
57b7b43b | 1667 | __be32 status = 0; |
ec6b5d7b | 1668 | |
a62573dc MJ |
1669 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1670 | return nfserr_inval; | |
1671 | ||
ec6b5d7b AA |
1672 | nfs4_lock_state(); |
1673 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1674 | conf = find_confirmed_client(&cr_ses->clientid); | |
1675 | ||
1676 | if (conf) { | |
49557cc7 AA |
1677 | cs_slot = &conf->cl_cs_slot; |
1678 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1679 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1680 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1681 | cs_slot->sl_seqid); |
38eb76a5 | 1682 | /* Return the cached reply status */ |
49557cc7 | 1683 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1684 | goto out; |
49557cc7 | 1685 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1686 | status = nfserr_seq_misordered; |
1687 | dprintk("Sequence misordered!\n"); | |
1688 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1689 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1690 | goto out; |
1691 | } | |
ec6b5d7b AA |
1692 | } else if (unconf) { |
1693 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1694 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1695 | status = nfserr_clid_inuse; |
1696 | goto out; | |
1697 | } | |
1698 | ||
49557cc7 AA |
1699 | cs_slot = &unconf->cl_cs_slot; |
1700 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1701 | if (status) { |
1702 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1703 | status = nfserr_seq_misordered; |
cd5b8144 | 1704 | goto out; |
ec6b5d7b AA |
1705 | } |
1706 | ||
86c3e16c | 1707 | confirm_me = true; |
ec6b5d7b AA |
1708 | conf = unconf; |
1709 | } else { | |
1710 | status = nfserr_stale_clientid; | |
1711 | goto out; | |
1712 | } | |
1713 | ||
8323c3b2 BF |
1714 | /* |
1715 | * XXX: we should probably set this at creation time, and check | |
1716 | * for consistent minorversion use throughout: | |
1717 | */ | |
1718 | conf->cl_minorversion = 1; | |
408b79bc BF |
1719 | /* |
1720 | * We do not support RDMA or persistent sessions | |
1721 | */ | |
1722 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1723 | cr_ses->flags &= ~SESSION4_RDMA; | |
1724 | ||
1b74c25b MJ |
1725 | status = nfserr_toosmall; |
1726 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1727 | goto out; | |
1728 | ||
ac7c46f2 BF |
1729 | status = nfserr_jukebox; |
1730 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1731 | if (!new) | |
ec6b5d7b | 1732 | goto out; |
ac7c46f2 BF |
1733 | status = nfs_ok; |
1734 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1735 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1736 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1737 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1738 | cs_slot->sl_seqid++; |
49557cc7 | 1739 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1740 | |
49557cc7 AA |
1741 | /* cache solo and embedded create sessions under the state lock */ |
1742 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1743 | if (confirm_me) |
1744 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1745 | out: |
1746 | nfs4_unlock_state(); | |
1747 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1748 | return status; | |
069b6ad4 AA |
1749 | } |
1750 | ||
57716355 BF |
1751 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1752 | { | |
1753 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1754 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1755 | ||
1756 | return argp->opcnt == resp->opcnt; | |
1757 | } | |
1758 | ||
1d1bc8f2 BF |
1759 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1760 | { | |
1761 | switch (*dir) { | |
1762 | case NFS4_CDFC4_FORE: | |
1763 | case NFS4_CDFC4_BACK: | |
1764 | return nfs_ok; | |
1765 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1766 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1767 | *dir = NFS4_CDFC4_BOTH; | |
1768 | return nfs_ok; | |
1769 | }; | |
1770 | return nfserr_inval; | |
1771 | } | |
1772 | ||
1773 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1774 | struct nfsd4_compound_state *cstate, | |
1775 | struct nfsd4_bind_conn_to_session *bcts) | |
1776 | { | |
1777 | __be32 status; | |
1778 | ||
1779 | if (!nfsd4_last_compound_op(rqstp)) | |
1780 | return nfserr_not_only_op; | |
1781 | spin_lock(&client_lock); | |
1782 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1783 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1784 | * client_lock iself: */ | |
1785 | if (cstate->session) { | |
1786 | nfsd4_get_session(cstate->session); | |
1787 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1788 | } | |
1789 | spin_unlock(&client_lock); | |
1790 | if (!cstate->session) | |
1791 | return nfserr_badsession; | |
1792 | ||
1793 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1794 | if (!status) |
1795 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1796 | return status; | |
1d1bc8f2 BF |
1797 | } |
1798 | ||
5d4cec2f BF |
1799 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1800 | { | |
1801 | if (!session) | |
1802 | return 0; | |
1803 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1804 | } | |
1805 | ||
069b6ad4 AA |
1806 | __be32 |
1807 | nfsd4_destroy_session(struct svc_rqst *r, | |
1808 | struct nfsd4_compound_state *cstate, | |
1809 | struct nfsd4_destroy_session *sessionid) | |
1810 | { | |
e10e0cfc | 1811 | struct nfsd4_session *ses; |
57b7b43b | 1812 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1813 | |
1814 | /* Notes: | |
1815 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1816 | * - Should we return nfserr_back_chan_busy if waiting for | |
1817 | * callbacks on to-be-destroyed session? | |
1818 | * - Do we need to clear any callback info from previous session? | |
1819 | */ | |
1820 | ||
5d4cec2f | 1821 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1822 | if (!nfsd4_last_compound_op(r)) |
1823 | return nfserr_not_only_op; | |
1824 | } | |
e10e0cfc | 1825 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1826 | spin_lock(&client_lock); |
e10e0cfc BH |
1827 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1828 | if (!ses) { | |
9089f1b4 | 1829 | spin_unlock(&client_lock); |
e10e0cfc BH |
1830 | goto out; |
1831 | } | |
1832 | ||
1833 | unhash_session(ses); | |
9089f1b4 | 1834 | spin_unlock(&client_lock); |
e10e0cfc | 1835 | |
ab707e15 | 1836 | nfs4_lock_state(); |
84f5f7cc | 1837 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1838 | nfs4_unlock_state(); |
19cf5c02 | 1839 | |
508dc6e1 | 1840 | spin_lock(&client_lock); |
19cf5c02 | 1841 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1842 | nfsd4_put_session_locked(ses); |
1843 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1844 | status = nfs_ok; |
1845 | out: | |
1846 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1847 | return status; | |
069b6ad4 AA |
1848 | } |
1849 | ||
a663bdd8 | 1850 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1851 | { |
1852 | struct nfsd4_conn *c; | |
1853 | ||
1854 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1855 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1856 | return c; |
1857 | } | |
1858 | } | |
1859 | return NULL; | |
1860 | } | |
1861 | ||
a663bdd8 | 1862 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1863 | { |
1864 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1865 | struct nfsd4_conn *c; |
21b75b01 | 1866 | int ret; |
328ead28 BF |
1867 | |
1868 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1869 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1870 | if (c) { |
1871 | spin_unlock(&clp->cl_lock); | |
1872 | free_conn(new); | |
1873 | return; | |
1874 | } | |
1875 | __nfsd4_hash_conn(new, ses); | |
1876 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1877 | ret = nfsd4_register_conn(new); |
1878 | if (ret) | |
1879 | /* oops; xprt is already down: */ | |
1880 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1881 | return; |
1882 | } | |
1883 | ||
868b89c3 MJ |
1884 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1885 | { | |
1886 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1887 | ||
1888 | return args->opcnt > session->se_fchannel.maxops; | |
1889 | } | |
1890 | ||
ae82a8d0 MJ |
1891 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1892 | struct nfsd4_session *session) | |
1893 | { | |
1894 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1895 | ||
1896 | return xb->len > session->se_fchannel.maxreq_sz; | |
1897 | } | |
1898 | ||
069b6ad4 | 1899 | __be32 |
b85d4c01 | 1900 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1901 | struct nfsd4_compound_state *cstate, |
1902 | struct nfsd4_sequence *seq) | |
1903 | { | |
f9bb94c4 | 1904 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1905 | struct nfsd4_session *session; |
1906 | struct nfsd4_slot *slot; | |
a663bdd8 | 1907 | struct nfsd4_conn *conn; |
57b7b43b | 1908 | __be32 status; |
b85d4c01 | 1909 | |
f9bb94c4 AA |
1910 | if (resp->opcnt != 1) |
1911 | return nfserr_sequence_pos; | |
1912 | ||
a663bdd8 BF |
1913 | /* |
1914 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1915 | * below. | |
1916 | */ | |
1917 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1918 | if (!conn) | |
1919 | return nfserr_jukebox; | |
1920 | ||
9089f1b4 | 1921 | spin_lock(&client_lock); |
b85d4c01 BH |
1922 | status = nfserr_badsession; |
1923 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1924 | if (!session) | |
1925 | goto out; | |
1926 | ||
868b89c3 MJ |
1927 | status = nfserr_too_many_ops; |
1928 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1929 | goto out; | |
1930 | ||
ae82a8d0 MJ |
1931 | status = nfserr_req_too_big; |
1932 | if (nfsd4_request_too_big(rqstp, session)) | |
1933 | goto out; | |
1934 | ||
b85d4c01 | 1935 | status = nfserr_badslot; |
6c18ba9f | 1936 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1937 | goto out; |
1938 | ||
557ce264 | 1939 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1940 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1941 | ||
a8dfdaeb AA |
1942 | /* We do not negotiate the number of slots yet, so set the |
1943 | * maxslots to the session maxreqs which is used to encode | |
1944 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1945 | seq->maxslots = session->se_fchannel.maxreqs; | |
1946 | ||
73e79482 BF |
1947 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
1948 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 1949 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
1950 | status = nfserr_seq_misordered; |
1951 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
1952 | goto out; | |
b85d4c01 BH |
1953 | cstate->slot = slot; |
1954 | cstate->session = session; | |
da3846a2 | 1955 | /* Return the cached reply status and set cstate->status |
557ce264 | 1956 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1957 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1958 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1959 | goto out; |
b85d4c01 BH |
1960 | } |
1961 | if (status) | |
1962 | goto out; | |
1963 | ||
a663bdd8 BF |
1964 | nfsd4_sequence_check_conn(conn, session); |
1965 | conn = NULL; | |
328ead28 | 1966 | |
b85d4c01 | 1967 | /* Success! bump slot seqid */ |
b85d4c01 | 1968 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 1969 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
1970 | if (seq->cachethis) |
1971 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
1972 | else |
1973 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
1974 | |
1975 | cstate->slot = slot; | |
1976 | cstate->session = session; | |
1977 | ||
b85d4c01 | 1978 | out: |
26c0c75e | 1979 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1980 | if (cstate->session) { |
0d7bb719 BF |
1981 | struct nfs4_client *clp = session->se_client; |
1982 | ||
36acb66b | 1983 | nfsd4_get_session(cstate->session); |
0d7bb719 | 1984 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
1985 | switch (clp->cl_cb_state) { |
1986 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 1987 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
1988 | break; |
1989 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 1990 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 1991 | break; |
fc0c3dd1 BH |
1992 | default: |
1993 | seq->status_flags = 0; | |
5423732a | 1994 | } |
aaf84eb9 | 1995 | } |
a663bdd8 | 1996 | kfree(conn); |
36acb66b | 1997 | spin_unlock(&client_lock); |
b85d4c01 BH |
1998 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1999 | return status; | |
069b6ad4 AA |
2000 | } |
2001 | ||
345c2842 MJ |
2002 | static inline bool has_resources(struct nfs4_client *clp) |
2003 | { | |
2004 | return !list_empty(&clp->cl_openowners) | |
2005 | || !list_empty(&clp->cl_delegations) | |
2006 | || !list_empty(&clp->cl_sessions); | |
2007 | } | |
2008 | ||
2009 | __be32 | |
2010 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2011 | { | |
2012 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2013 | __be32 status = 0; |
345c2842 MJ |
2014 | |
2015 | nfs4_lock_state(); | |
2016 | unconf = find_unconfirmed_client(&dc->clientid); | |
2017 | conf = find_confirmed_client(&dc->clientid); | |
2018 | ||
2019 | if (conf) { | |
2020 | clp = conf; | |
2021 | ||
2022 | if (!is_client_expired(conf) && has_resources(conf)) { | |
2023 | status = nfserr_clientid_busy; | |
2024 | goto out; | |
2025 | } | |
2026 | ||
2027 | /* rfc5661 18.50.3 */ | |
2028 | if (cstate->session && conf == cstate->session->se_client) { | |
2029 | status = nfserr_clientid_busy; | |
2030 | goto out; | |
2031 | } | |
2032 | } else if (unconf) | |
2033 | clp = unconf; | |
2034 | else { | |
2035 | status = nfserr_stale_clientid; | |
2036 | goto out; | |
2037 | } | |
2038 | ||
2039 | expire_client(clp); | |
2040 | out: | |
2041 | nfs4_unlock_state(); | |
2042 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2043 | return status; | |
2044 | } | |
2045 | ||
4dc6ec00 BF |
2046 | __be32 |
2047 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2048 | { | |
57b7b43b | 2049 | __be32 status = 0; |
bcecf1cc | 2050 | |
4dc6ec00 BF |
2051 | if (rc->rca_one_fs) { |
2052 | if (!cstate->current_fh.fh_dentry) | |
2053 | return nfserr_nofilehandle; | |
2054 | /* | |
2055 | * We don't take advantage of the rca_one_fs case. | |
2056 | * That's OK, it's optional, we can safely ignore it. | |
2057 | */ | |
2058 | return nfs_ok; | |
2059 | } | |
bcecf1cc | 2060 | |
4dc6ec00 | 2061 | nfs4_lock_state(); |
bcecf1cc | 2062 | status = nfserr_complete_already; |
a52d726b JL |
2063 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2064 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2065 | goto out; |
2066 | ||
2067 | status = nfserr_stale_clientid; | |
2068 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2069 | /* |
2070 | * The following error isn't really legal. | |
2071 | * But we only get here if the client just explicitly | |
2072 | * destroyed the client. Surely it no longer cares what | |
2073 | * error it gets back on an operation for the dead | |
2074 | * client. | |
2075 | */ | |
bcecf1cc MJ |
2076 | goto out; |
2077 | ||
2078 | status = nfs_ok; | |
2a4317c5 | 2079 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2080 | out: |
4dc6ec00 | 2081 | nfs4_unlock_state(); |
bcecf1cc | 2082 | return status; |
4dc6ec00 BF |
2083 | } |
2084 | ||
b37ad28b | 2085 | __be32 |
b591480b BF |
2086 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2087 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2088 | { |
a084daf5 | 2089 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2090 | nfs4_verifier clverifier = setclid->se_verf; |
2091 | unsigned int strhashval; | |
28ce6054 | 2092 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2093 | __be32 status; |
a55370a3 | 2094 | char dname[HEXDIR_LEN]; |
1da177e4 | 2095 | |
a55370a3 N |
2096 | status = nfs4_make_rec_clidname(dname, &clname); |
2097 | if (status) | |
73aea4ec | 2098 | return status; |
a55370a3 | 2099 | |
1da177e4 LT |
2100 | /* |
2101 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2102 | * We get here on a DRC miss. | |
2103 | */ | |
2104 | ||
a55370a3 | 2105 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2106 | |
1da177e4 | 2107 | nfs4_lock_state(); |
e203d506 | 2108 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2109 | if (conf) { |
a186e767 | 2110 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2111 | status = nfserr_clid_inuse; |
e203d506 BF |
2112 | if (clp_used_exchangeid(conf)) |
2113 | goto out; | |
026722c2 | 2114 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2115 | char addr_str[INET6_ADDRSTRLEN]; |
2116 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2117 | sizeof(addr_str)); | |
2118 | dprintk("NFSD: setclientid: string in use by client " | |
2119 | "at %s\n", addr_str); | |
1da177e4 LT |
2120 | goto out; |
2121 | } | |
1da177e4 | 2122 | } |
a186e767 BF |
2123 | /* |
2124 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2125 | * has a description of SETCLIENTID request processing consisting | |
2126 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2127 | */ | |
e203d506 | 2128 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2129 | status = nfserr_jukebox; |
1da177e4 | 2130 | if (!conf) { |
a186e767 BF |
2131 | /* |
2132 | * RFC 3530 14.2.33 CASE 4: | |
2133 | * placed first, because it is the normal case | |
1da177e4 LT |
2134 | */ |
2135 | if (unconf) | |
2136 | expire_client(unconf); | |
b09333c4 | 2137 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2138 | if (new == NULL) |
1da177e4 | 2139 | goto out; |
1da177e4 | 2140 | gen_clid(new); |
599e0a22 | 2141 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2142 | /* |
a186e767 BF |
2143 | * RFC 3530 14.2.33 CASE 1: |
2144 | * probable callback update | |
1da177e4 | 2145 | */ |
31f4a6c1 N |
2146 | if (unconf) { |
2147 | /* Note this is removing unconfirmed {*x***}, | |
2148 | * which is stronger than RFC recommended {vxc**}. | |
2149 | * This has the advantage that there is at most | |
2150 | * one {*x***} in either list at any time. | |
2151 | */ | |
2152 | expire_client(unconf); | |
1da177e4 | 2153 | } |
b09333c4 | 2154 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2155 | if (new == NULL) |
1da177e4 | 2156 | goto out; |
1da177e4 | 2157 | copy_clid(new, conf); |
1da177e4 LT |
2158 | } else if (!unconf) { |
2159 | /* | |
a186e767 BF |
2160 | * RFC 3530 14.2.33 CASE 2: |
2161 | * probable client reboot; state will be removed if | |
2162 | * confirmed. | |
1da177e4 | 2163 | */ |
b09333c4 | 2164 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2165 | if (new == NULL) |
1da177e4 | 2166 | goto out; |
1da177e4 | 2167 | gen_clid(new); |
49ba8781 | 2168 | } else { |
a186e767 BF |
2169 | /* |
2170 | * RFC 3530 14.2.33 CASE 3: | |
2171 | * probable client reboot; state will be removed if | |
2172 | * confirmed. | |
1da177e4 LT |
2173 | */ |
2174 | expire_client(unconf); | |
b09333c4 | 2175 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2176 | if (new == NULL) |
1da177e4 | 2177 | goto out; |
1da177e4 | 2178 | gen_clid(new); |
1da177e4 | 2179 | } |
8323c3b2 BF |
2180 | /* |
2181 | * XXX: we should probably set this at creation time, and check | |
2182 | * for consistent minorversion use throughout: | |
2183 | */ | |
2184 | new->cl_minorversion = 0; | |
6f3d772f | 2185 | gen_callback(new, setclid, rqstp); |
c175b83c | 2186 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2187 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2188 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2189 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2190 | status = nfs_ok; | |
2191 | out: | |
2192 | nfs4_unlock_state(); | |
2193 | return status; | |
2194 | } | |
2195 | ||
2196 | ||
2197 | /* | |
a186e767 BF |
2198 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2199 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2200 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2201 | */ |
b37ad28b | 2202 | __be32 |
b591480b BF |
2203 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2204 | struct nfsd4_compound_state *cstate, | |
2205 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2206 | { |
21ab45a4 | 2207 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2208 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2209 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2210 | __be32 status; |
1da177e4 LT |
2211 | |
2212 | if (STALE_CLIENTID(clid)) | |
2213 | return nfserr_stale_clientid; | |
2214 | /* | |
2215 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2216 | * We get here on a DRC miss. | |
2217 | */ | |
2218 | ||
2219 | nfs4_lock_state(); | |
21ab45a4 N |
2220 | |
2221 | conf = find_confirmed_client(clid); | |
2222 | unconf = find_unconfirmed_client(clid); | |
2223 | ||
a186e767 BF |
2224 | /* |
2225 | * section 14.2.34 of RFC 3530 has a description of | |
2226 | * SETCLIENTID_CONFIRM request processing consisting | |
2227 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2228 | */ | |
f07ea10d | 2229 | status = nfserr_clid_inuse; |
366e0c1d | 2230 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2231 | /* |
2232 | * RFC 3530 14.2.34 CASE 1: | |
2233 | * callback update | |
2234 | */ | |
599e0a22 | 2235 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2236 | status = nfserr_clid_inuse; |
2237 | else { | |
5a3c9d71 BF |
2238 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2239 | nfsd4_probe_callback(conf); | |
1a69c179 | 2240 | expire_client(unconf); |
1da177e4 LT |
2241 | status = nfs_ok; |
2242 | } | |
f3aba4e5 | 2243 | } else if (conf && !unconf) { |
a186e767 BF |
2244 | /* |
2245 | * RFC 3530 14.2.34 CASE 2: | |
2246 | * probable retransmitted request; play it safe and | |
2247 | * do nothing. | |
7c79f737 | 2248 | */ |
599e0a22 | 2249 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2250 | status = nfserr_clid_inuse; |
21ab45a4 | 2251 | else |
1da177e4 | 2252 | status = nfs_ok; |
7c79f737 | 2253 | } else if (!conf && unconf |
599e0a22 | 2254 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2255 | /* |
2256 | * RFC 3530 14.2.34 CASE 3: | |
2257 | * Normal case; new or rebooted client: | |
7c79f737 | 2258 | */ |
599e0a22 | 2259 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2260 | status = nfserr_clid_inuse; |
2261 | } else { | |
1a69c179 N |
2262 | unsigned int hash = |
2263 | clientstr_hashval(unconf->cl_recdir); | |
2264 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2265 | hash); |
1a69c179 | 2266 | if (conf) { |
2a4317c5 | 2267 | nfsd4_client_record_remove(conf); |
1a69c179 N |
2268 | expire_client(conf); |
2269 | } | |
1da177e4 | 2270 | move_to_confirmed(unconf); |
21ab45a4 | 2271 | conf = unconf; |
5a3c9d71 | 2272 | nfsd4_probe_callback(conf); |
1a69c179 | 2273 | status = nfs_ok; |
1da177e4 | 2274 | } |
599e0a22 BF |
2275 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2276 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2277 | &confirm)))) { |
a186e767 BF |
2278 | /* |
2279 | * RFC 3530 14.2.34 CASE 4: | |
2280 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2281 | */ |
1da177e4 | 2282 | status = nfserr_stale_clientid; |
08e8987c | 2283 | } |
f07ea10d | 2284 | |
1da177e4 LT |
2285 | nfs4_unlock_state(); |
2286 | return status; | |
2287 | } | |
2288 | ||
32513b40 BF |
2289 | static struct nfs4_file *nfsd4_alloc_file(void) |
2290 | { | |
2291 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2292 | } | |
2293 | ||
1da177e4 | 2294 | /* OPEN Share state helper functions */ |
32513b40 | 2295 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2296 | { |
1da177e4 LT |
2297 | unsigned int hashval = file_hashval(ino); |
2298 | ||
32513b40 BF |
2299 | atomic_set(&fp->fi_ref, 1); |
2300 | INIT_LIST_HEAD(&fp->fi_hash); | |
2301 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2302 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2303 | fp->fi_inode = igrab(ino); | |
2304 | fp->fi_had_conflict = false; | |
2305 | fp->fi_lease = NULL; | |
2306 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2307 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2308 | spin_lock(&recall_lock); | |
2309 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2310 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2311 | } |
2312 | ||
e60d4398 | 2313 | static void |
e18b890b | 2314 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2315 | { |
e60d4398 N |
2316 | if (*slab == NULL) |
2317 | return; | |
1a1d92c1 | 2318 | kmem_cache_destroy(*slab); |
e60d4398 | 2319 | *slab = NULL; |
1da177e4 LT |
2320 | } |
2321 | ||
e8ff2a84 | 2322 | void |
1da177e4 LT |
2323 | nfsd4_free_slabs(void) |
2324 | { | |
fe0750e5 BF |
2325 | nfsd4_free_slab(&openowner_slab); |
2326 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2327 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2328 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2329 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2330 | } |
1da177e4 | 2331 | |
72083396 | 2332 | int |
e60d4398 N |
2333 | nfsd4_init_slabs(void) |
2334 | { | |
fe0750e5 BF |
2335 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2336 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2337 | if (openowner_slab == NULL) | |
2338 | goto out_nomem; | |
2339 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2340 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2341 | if (lockowner_slab == NULL) | |
e60d4398 N |
2342 | goto out_nomem; |
2343 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2344 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2345 | if (file_slab == NULL) |
2346 | goto out_nomem; | |
5ac049ac | 2347 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2348 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2349 | if (stateid_slab == NULL) |
2350 | goto out_nomem; | |
5b2d21c1 | 2351 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2352 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2353 | if (deleg_slab == NULL) |
2354 | goto out_nomem; | |
e60d4398 N |
2355 | return 0; |
2356 | out_nomem: | |
2357 | nfsd4_free_slabs(); | |
2358 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2359 | return -ENOMEM; | |
1da177e4 LT |
2360 | } |
2361 | ||
fe0750e5 BF |
2362 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2363 | { | |
2364 | kfree(oo->oo_owner.so_owner.data); | |
2365 | kmem_cache_free(openowner_slab, oo); | |
2366 | } | |
2367 | ||
2368 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2369 | { |
fe0750e5 BF |
2370 | kfree(lo->lo_owner.so_owner.data); |
2371 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2372 | } |
2373 | ||
ff194bd9 | 2374 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2375 | { |
ff194bd9 BF |
2376 | rp->rp_status = nfserr_serverfault; |
2377 | rp->rp_buflen = 0; | |
2378 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2379 | } |
2380 | ||
fe0750e5 | 2381 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2382 | { |
1da177e4 | 2383 | struct nfs4_stateowner *sop; |
1da177e4 | 2384 | |
fe0750e5 | 2385 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2386 | if (!sop) |
2387 | return NULL; | |
2388 | ||
2389 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2390 | if (!sop->so_owner.data) { | |
fe0750e5 | 2391 | kmem_cache_free(slab, sop); |
1da177e4 | 2392 | return NULL; |
ff194bd9 BF |
2393 | } |
2394 | sop->so_owner.len = owner->len; | |
2395 | ||
ea1da636 | 2396 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2397 | sop->so_client = clp; |
2398 | init_nfs4_replay(&sop->so_replay); | |
2399 | return sop; | |
2400 | } | |
2401 | ||
fe0750e5 | 2402 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2403 | { |
16bfdaaf | 2404 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2405 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2406 | } |
2407 | ||
fe0750e5 | 2408 | static struct nfs4_openowner * |
ff194bd9 | 2409 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2410 | struct nfs4_openowner *oo; |
ff194bd9 | 2411 | |
fe0750e5 BF |
2412 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2413 | if (!oo) | |
ff194bd9 | 2414 | return NULL; |
fe0750e5 BF |
2415 | oo->oo_owner.so_is_open_owner = 1; |
2416 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2417 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2418 | oo->oo_time = 0; |
38c387b5 | 2419 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2420 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2421 | hash_openowner(oo, clp, strhashval); | |
2422 | return oo; | |
1da177e4 LT |
2423 | } |
2424 | ||
996e0938 | 2425 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2426 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2427 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2428 | |
996e0938 | 2429 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2430 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2431 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2432 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2433 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2434 | get_nfs4_file(fp); |
1da177e4 | 2435 | stp->st_file = fp; |
1da177e4 LT |
2436 | stp->st_access_bmap = 0; |
2437 | stp->st_deny_bmap = 0; | |
b6d2f1ca | 2438 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1da177e4 | 2439 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2440 | stp->st_openstp = NULL; |
1da177e4 LT |
2441 | } |
2442 | ||
fd39ca9a | 2443 | static void |
fe0750e5 | 2444 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2445 | { |
fe0750e5 | 2446 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2447 | |
fe0750e5 BF |
2448 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2449 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2450 | } |
2451 | ||
1da177e4 | 2452 | static int |
599e0a22 BF |
2453 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2454 | clientid_t *clid) | |
2455 | { | |
2456 | return (sop->so_owner.len == owner->len) && | |
2457 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2458 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2459 | } |
2460 | ||
fe0750e5 | 2461 | static struct nfs4_openowner * |
1da177e4 LT |
2462 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2463 | { | |
a50d2ad1 BF |
2464 | struct nfs4_stateowner *so; |
2465 | struct nfs4_openowner *oo; | |
1da177e4 | 2466 | |
16bfdaaf BF |
2467 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2468 | if (!so->so_is_open_owner) | |
2469 | continue; | |
a50d2ad1 BF |
2470 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2471 | oo = openowner(so); | |
2472 | renew_client(oo->oo_owner.so_client); | |
2473 | return oo; | |
2474 | } | |
1da177e4 LT |
2475 | } |
2476 | return NULL; | |
2477 | } | |
2478 | ||
2479 | /* search file_hashtbl[] for file */ | |
2480 | static struct nfs4_file * | |
2481 | find_file(struct inode *ino) | |
2482 | { | |
2483 | unsigned int hashval = file_hashval(ino); | |
2484 | struct nfs4_file *fp; | |
2485 | ||
8b671b80 | 2486 | spin_lock(&recall_lock); |
1da177e4 | 2487 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2488 | if (fp->fi_inode == ino) { |
2489 | get_nfs4_file(fp); | |
8b671b80 | 2490 | spin_unlock(&recall_lock); |
1da177e4 | 2491 | return fp; |
13cd2184 | 2492 | } |
1da177e4 | 2493 | } |
8b671b80 | 2494 | spin_unlock(&recall_lock); |
1da177e4 LT |
2495 | return NULL; |
2496 | } | |
2497 | ||
1da177e4 LT |
2498 | /* |
2499 | * Called to check deny when READ with all zero stateid or | |
2500 | * WRITE with all zero or all one stateid | |
2501 | */ | |
b37ad28b | 2502 | static __be32 |
1da177e4 LT |
2503 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2504 | { | |
2505 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2506 | struct nfs4_file *fp; | |
dcef0413 | 2507 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2508 | __be32 ret; |
1da177e4 LT |
2509 | |
2510 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2511 | ||
2512 | fp = find_file(ino); | |
13cd2184 N |
2513 | if (!fp) |
2514 | return nfs_ok; | |
b700949b | 2515 | ret = nfserr_locked; |
1da177e4 | 2516 | /* Search for conflicting share reservations */ |
13cd2184 N |
2517 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2518 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2519 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2520 | goto out; | |
1da177e4 | 2521 | } |
13cd2184 N |
2522 | ret = nfs_ok; |
2523 | out: | |
2524 | put_nfs4_file(fp); | |
2525 | return ret; | |
1da177e4 LT |
2526 | } |
2527 | ||
6b57d9c8 | 2528 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2529 | { |
1da177e4 LT |
2530 | /* We're assuming the state code never drops its reference |
2531 | * without first removing the lease. Since we're in this lease | |
2532 | * callback (and since the lease code is serialized by the kernel | |
2533 | * lock) we know the server hasn't removed the lease yet, we know | |
2534 | * it's safe to take a reference: */ | |
2535 | atomic_inc(&dp->dl_count); | |
2536 | ||
1da177e4 | 2537 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2538 | |
460781b5 | 2539 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2540 | dp->dl_time = get_seconds(); |
2541 | ||
6b57d9c8 BF |
2542 | nfsd4_cb_recall(dp); |
2543 | } | |
2544 | ||
acfdf5c3 | 2545 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2546 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2547 | { | |
acfdf5c3 BF |
2548 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2549 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2550 | |
acfdf5c3 BF |
2551 | BUG_ON(!fp); |
2552 | /* We assume break_lease is only called once per lease: */ | |
2553 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2554 | /* |
2555 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2556 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2557 | * in time: |
0272e1fd BF |
2558 | */ |
2559 | fl->fl_break_time = 0; | |
1da177e4 | 2560 | |
5d926e8c | 2561 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2562 | fp->fi_had_conflict = true; |
2563 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2564 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2565 | spin_unlock(&recall_lock); |
1da177e4 LT |
2566 | } |
2567 | ||
1da177e4 LT |
2568 | static |
2569 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2570 | { | |
2571 | if (arg & F_UNLCK) | |
2572 | return lease_modify(onlist, arg); | |
2573 | else | |
2574 | return -EAGAIN; | |
2575 | } | |
2576 | ||
7b021967 | 2577 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2578 | .lm_break = nfsd_break_deleg_cb, |
2579 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2580 | }; |
2581 | ||
7a8711c9 BF |
2582 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2583 | { | |
2584 | if (nfsd4_has_session(cstate)) | |
2585 | return nfs_ok; | |
2586 | if (seqid == so->so_seqid - 1) | |
2587 | return nfserr_replay_me; | |
2588 | if (seqid == so->so_seqid) | |
2589 | return nfs_ok; | |
2590 | return nfserr_bad_seqid; | |
2591 | } | |
1da177e4 | 2592 | |
b37ad28b | 2593 | __be32 |
6668958f AA |
2594 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2595 | struct nfsd4_open *open) | |
1da177e4 | 2596 | { |
1da177e4 LT |
2597 | clientid_t *clientid = &open->op_clientid; |
2598 | struct nfs4_client *clp = NULL; | |
2599 | unsigned int strhashval; | |
fe0750e5 | 2600 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2601 | __be32 status; |
1da177e4 | 2602 | |
1da177e4 LT |
2603 | if (STALE_CLIENTID(&open->op_clientid)) |
2604 | return nfserr_stale_clientid; | |
32513b40 BF |
2605 | /* |
2606 | * In case we need it later, after we've already created the | |
2607 | * file and don't want to risk a further failure: | |
2608 | */ | |
2609 | open->op_file = nfsd4_alloc_file(); | |
2610 | if (open->op_file == NULL) | |
2611 | return nfserr_jukebox; | |
1da177e4 | 2612 | |
16bfdaaf | 2613 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2614 | oo = find_openstateowner_str(strhashval, open); |
2615 | open->op_openowner = oo; | |
2616 | if (!oo) { | |
1da177e4 LT |
2617 | clp = find_confirmed_client(clientid); |
2618 | if (clp == NULL) | |
0f442aa2 | 2619 | return nfserr_expired; |
bcf130f9 | 2620 | goto new_owner; |
1da177e4 | 2621 | } |
dad1c067 | 2622 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2623 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2624 | clp = oo->oo_owner.so_client; |
2625 | release_openowner(oo); | |
2626 | open->op_openowner = NULL; | |
bcf130f9 | 2627 | goto new_owner; |
0f442aa2 | 2628 | } |
4cdc951b BF |
2629 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2630 | if (status) | |
2631 | return status; | |
2632 | clp = oo->oo_owner.so_client; | |
2633 | goto alloc_stateid; | |
bcf130f9 BF |
2634 | new_owner: |
2635 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2636 | if (oo == NULL) | |
2637 | return nfserr_jukebox; | |
2638 | open->op_openowner = oo; | |
4cdc951b BF |
2639 | alloc_stateid: |
2640 | open->op_stp = nfs4_alloc_stateid(clp); | |
2641 | if (!open->op_stp) | |
2642 | return nfserr_jukebox; | |
0f442aa2 | 2643 | return nfs_ok; |
1da177e4 LT |
2644 | } |
2645 | ||
b37ad28b | 2646 | static inline __be32 |
4a6e43e6 N |
2647 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2648 | { | |
2649 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2650 | return nfserr_openmode; | |
2651 | else | |
2652 | return nfs_ok; | |
2653 | } | |
2654 | ||
f459e453 | 2655 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2656 | { |
f459e453 | 2657 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2658 | } |
2659 | ||
38c2f4b1 | 2660 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2661 | { |
f459e453 | 2662 | struct nfs4_stid *ret; |
24a0111e | 2663 | |
38c2f4b1 | 2664 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2665 | if (!ret) |
2666 | return NULL; | |
2667 | return delegstateid(ret); | |
24a0111e BF |
2668 | } |
2669 | ||
8b289b2c BF |
2670 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2671 | { | |
2672 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2673 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2674 | } | |
2675 | ||
b37ad28b | 2676 | static __be32 |
38c2f4b1 | 2677 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2678 | struct nfs4_delegation **dp) |
2679 | { | |
2680 | int flags; | |
b37ad28b | 2681 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2682 | |
38c2f4b1 | 2683 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2684 | if (*dp == NULL) |
c44c5eeb | 2685 | goto out; |
24a0111e | 2686 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2687 | status = nfs4_check_delegmode(*dp, flags); |
2688 | if (status) | |
2689 | *dp = NULL; | |
c44c5eeb | 2690 | out: |
8b289b2c | 2691 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2692 | return nfs_ok; |
2693 | if (status) | |
2694 | return status; | |
dad1c067 | 2695 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2696 | return nfs_ok; |
567d9829 N |
2697 | } |
2698 | ||
b37ad28b | 2699 | static __be32 |
dcef0413 | 2700 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2701 | { |
dcef0413 | 2702 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2703 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2704 | |
8beefa24 | 2705 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2706 | /* ignore lock owners */ |
2707 | if (local->st_stateowner->so_is_open_owner == 0) | |
2708 | continue; | |
2709 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2710 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2711 | *stpp = local; |
2712 | /* check for conflicting share reservations */ | |
2713 | if (!test_share(local, open)) | |
77eaae8d | 2714 | return nfserr_share_denied; |
1da177e4 | 2715 | } |
77eaae8d | 2716 | return nfs_ok; |
1da177e4 LT |
2717 | } |
2718 | ||
996e0938 BF |
2719 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2720 | { | |
2721 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2722 | } |
2723 | ||
21fb4016 BF |
2724 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2725 | { | |
2726 | int flags = 0; | |
2727 | ||
2728 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2729 | flags |= NFSD_MAY_READ; | |
2730 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2731 | flags |= NFSD_MAY_WRITE; | |
2732 | return flags; | |
2733 | } | |
2734 | ||
0c12eaff CB |
2735 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2736 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2737 | { |
2738 | __be32 status; | |
0c12eaff CB |
2739 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2740 | int access = nfs4_access_to_access(open->op_share_access); | |
2741 | ||
f9d7562f BF |
2742 | if (!fp->fi_fds[oflag]) { |
2743 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2744 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2745 | if (status) |
2746 | return status; | |
2747 | } | |
2748 | nfs4_file_get_access(fp, oflag); | |
2749 | ||
2750 | return nfs_ok; | |
2751 | } | |
2752 | ||
b37ad28b | 2753 | static inline __be32 |
1da177e4 LT |
2754 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2755 | struct nfsd4_open *open) | |
2756 | { | |
2757 | struct iattr iattr = { | |
2758 | .ia_valid = ATTR_SIZE, | |
2759 | .ia_size = 0, | |
2760 | }; | |
2761 | if (!open->op_truncate) | |
2762 | return 0; | |
2763 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2764 | return nfserr_inval; |
1da177e4 LT |
2765 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2766 | } | |
2767 | ||
b37ad28b | 2768 | static __be32 |
dcef0413 | 2769 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2770 | { |
b6d2f1ca | 2771 | u32 op_share_access = open->op_share_access; |
7d947842 | 2772 | bool new_access; |
b37ad28b | 2773 | __be32 status; |
1da177e4 | 2774 | |
7d947842 | 2775 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2776 | if (new_access) { |
0c12eaff | 2777 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2778 | if (status) |
2779 | return status; | |
6c26d08f | 2780 | } |
1da177e4 LT |
2781 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2782 | if (status) { | |
f9d7562f | 2783 | if (new_access) { |
f197c271 | 2784 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2785 | nfs4_file_put_access(fp, oflag); |
2786 | } | |
1da177e4 LT |
2787 | return status; |
2788 | } | |
2789 | /* remember the open */ | |
24a0111e | 2790 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2791 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2792 | |
2793 | return nfs_ok; | |
2794 | } | |
2795 | ||
2796 | ||
1da177e4 | 2797 | static void |
1255a8f3 | 2798 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2799 | { |
dad1c067 | 2800 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2801 | } |
2802 | ||
14a24e99 BF |
2803 | /* Should we give out recallable state?: */ |
2804 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2805 | { | |
2806 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2807 | return true; | |
2808 | /* | |
2809 | * In the sessions case, since we don't have to establish a | |
2810 | * separate connection for callbacks, we assume it's OK | |
2811 | * until we hear otherwise: | |
2812 | */ | |
2813 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2814 | } | |
2815 | ||
22d38c4c BF |
2816 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2817 | { | |
2818 | struct file_lock *fl; | |
2819 | ||
2820 | fl = locks_alloc_lock(); | |
2821 | if (!fl) | |
2822 | return NULL; | |
2823 | locks_init_lock(fl); | |
2824 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2825 | fl->fl_flags = FL_LEASE; | |
2826 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2827 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2828 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2829 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2830 | return fl; |
2831 | } | |
2832 | ||
edab9782 BF |
2833 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2834 | { | |
acfdf5c3 | 2835 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2836 | struct file_lock *fl; |
2837 | int status; | |
2838 | ||
2839 | fl = nfs4_alloc_init_lease(dp, flag); | |
2840 | if (!fl) | |
2841 | return -ENOMEM; | |
acfdf5c3 | 2842 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2843 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2844 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2845 | if (status) { |
acfdf5c3 | 2846 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2847 | locks_free_lock(fl); |
2848 | return -ENOMEM; | |
2849 | } | |
acfdf5c3 BF |
2850 | fp->fi_lease = fl; |
2851 | fp->fi_deleg_file = fl->fl_file; | |
2852 | get_file(fp->fi_deleg_file); | |
2853 | atomic_set(&fp->fi_delegees, 1); | |
2854 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2855 | return 0; | |
2856 | } | |
2857 | ||
2858 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2859 | { | |
2860 | struct nfs4_file *fp = dp->dl_file; | |
2861 | ||
2862 | if (!fp->fi_lease) | |
2863 | return nfs4_setlease(dp, flag); | |
2864 | spin_lock(&recall_lock); | |
2865 | if (fp->fi_had_conflict) { | |
2866 | spin_unlock(&recall_lock); | |
2867 | return -EAGAIN; | |
2868 | } | |
2869 | atomic_inc(&fp->fi_delegees); | |
2870 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2871 | spin_unlock(&recall_lock); | |
2a74aba7 | 2872 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2873 | return 0; |
2874 | } | |
2875 | ||
4aa8913c BH |
2876 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2877 | { | |
2878 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2879 | if (status == -EAGAIN) | |
2880 | open->op_why_no_deleg = WND4_CONTENTION; | |
2881 | else { | |
2882 | open->op_why_no_deleg = WND4_RESOURCE; | |
2883 | switch (open->op_deleg_want) { | |
2884 | case NFS4_SHARE_WANT_READ_DELEG: | |
2885 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2886 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2887 | break; | |
2888 | case NFS4_SHARE_WANT_CANCEL: | |
2889 | open->op_why_no_deleg = WND4_CANCELLED; | |
2890 | break; | |
2891 | case NFS4_SHARE_WANT_NO_DELEG: | |
2892 | BUG(); /* not supposed to get here */ | |
2893 | } | |
2894 | } | |
2895 | } | |
2896 | ||
1da177e4 LT |
2897 | /* |
2898 | * Attempt to hand out a delegation. | |
2899 | */ | |
2900 | static void | |
dcef0413 | 2901 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2902 | { |
2903 | struct nfs4_delegation *dp; | |
fe0750e5 | 2904 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2905 | int cb_up; |
d24433cd | 2906 | int status = 0, flag = 0; |
1da177e4 | 2907 | |
fe0750e5 | 2908 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2909 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2910 | open->op_recall = 0; |
2911 | switch (open->op_claim_type) { | |
2912 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2913 | if (!cb_up) |
7b190fec N |
2914 | open->op_recall = 1; |
2915 | flag = open->op_delegate_type; | |
2916 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2917 | goto out; | |
2918 | break; | |
2919 | case NFS4_OPEN_CLAIM_NULL: | |
2920 | /* Let's not give out any delegations till everyone's | |
2921 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2922 | if (locks_in_grace()) |
7b190fec | 2923 | goto out; |
dad1c067 | 2924 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2925 | goto out; |
2926 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2927 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2928 | else | |
2929 | flag = NFS4_OPEN_DELEGATE_READ; | |
2930 | break; | |
2931 | default: | |
2932 | goto out; | |
2933 | } | |
1da177e4 | 2934 | |
fe0750e5 | 2935 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2936 | if (dp == NULL) |
2937 | goto out_no_deleg; | |
acfdf5c3 | 2938 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2939 | if (status) |
dd239cc0 | 2940 | goto out_free; |
1da177e4 | 2941 | |
d5477a8d | 2942 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2943 | |
8c10cbdb | 2944 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2945 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2946 | out: |
2947 | open->op_delegate_type = flag; | |
d24433cd BH |
2948 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2949 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2950 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2951 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2952 | ||
4aa8913c BH |
2953 | /* 4.1 client asking for a delegation? */ |
2954 | if (open->op_deleg_want) | |
2955 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2956 | } |
dd239cc0 BF |
2957 | return; |
2958 | out_free: | |
acfdf5c3 | 2959 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2960 | out_no_deleg: |
2961 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2962 | goto out; | |
1da177e4 LT |
2963 | } |
2964 | ||
e27f49c3 BH |
2965 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
2966 | struct nfs4_delegation *dp) | |
2967 | { | |
2968 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
2969 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2970 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2971 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
2972 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
2973 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
2974 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2975 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
2976 | } | |
2977 | /* Otherwise the client must be confused wanting a delegation | |
2978 | * it already has, therefore we don't return | |
2979 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
2980 | */ | |
2981 | } | |
2982 | ||
1da177e4 LT |
2983 | /* |
2984 | * called with nfs4_lock_state() held. | |
2985 | */ | |
b37ad28b | 2986 | __be32 |
1da177e4 LT |
2987 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2988 | { | |
6668958f | 2989 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 2990 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
2991 | struct nfs4_file *fp = NULL; |
2992 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 2993 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 2994 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2995 | __be32 status; |
1da177e4 | 2996 | |
1da177e4 LT |
2997 | /* |
2998 | * Lookup file; if found, lookup stateid and check open request, | |
2999 | * and check for delegations in the process of being recalled. | |
3000 | * If not found, create the nfs4_file struct | |
3001 | */ | |
3002 | fp = find_file(ino); | |
3003 | if (fp) { | |
3004 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3005 | goto out; | |
38c2f4b1 | 3006 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3007 | if (status) |
3008 | goto out; | |
1da177e4 | 3009 | } else { |
c44c5eeb | 3010 | status = nfserr_bad_stateid; |
8b289b2c | 3011 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3012 | goto out; |
3e772463 | 3013 | status = nfserr_jukebox; |
32513b40 BF |
3014 | fp = open->op_file; |
3015 | open->op_file = NULL; | |
3016 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3017 | } |
3018 | ||
3019 | /* | |
3020 | * OPEN the file, or upgrade an existing OPEN. | |
3021 | * If truncate fails, the OPEN fails. | |
3022 | */ | |
3023 | if (stp) { | |
3024 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3025 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3026 | if (status) |
3027 | goto out; | |
3028 | } else { | |
4cdc951b | 3029 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3030 | if (status) |
1da177e4 | 3031 | goto out; |
4cdc951b BF |
3032 | stp = open->op_stp; |
3033 | open->op_stp = NULL; | |
996e0938 | 3034 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
3035 | status = nfsd4_truncate(rqstp, current_fh, open); |
3036 | if (status) { | |
2283963f | 3037 | release_open_stateid(stp); |
1da177e4 LT |
3038 | goto out; |
3039 | } | |
3040 | } | |
dcef0413 BF |
3041 | update_stateid(&stp->st_stid.sc_stateid); |
3042 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3043 | |
d24433cd | 3044 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3045 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3046 | |
d24433cd BH |
3047 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3048 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3049 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3050 | goto nodeleg; | |
3051 | } | |
3052 | } | |
3053 | ||
1da177e4 LT |
3054 | /* |
3055 | * Attempt to hand out a delegation. No error return, because the | |
3056 | * OPEN succeeds even if we fail. | |
3057 | */ | |
3058 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3059 | nodeleg: |
1da177e4 LT |
3060 | status = nfs_ok; |
3061 | ||
8c10cbdb | 3062 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3063 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3064 | out: |
d24433cd BH |
3065 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3066 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3067 | open->op_deleg_want) |
3068 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3069 | |
13cd2184 N |
3070 | if (fp) |
3071 | put_nfs4_file(fp); | |
37515177 | 3072 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3073 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3074 | /* |
3075 | * To finish the open response, we just need to set the rflags. | |
3076 | */ | |
3077 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3078 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3079 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3080 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3081 | ||
3082 | return status; | |
3083 | } | |
3084 | ||
d29b20cd BF |
3085 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3086 | { | |
3087 | if (open->op_openowner) { | |
3088 | struct nfs4_openowner *oo = open->op_openowner; | |
3089 | ||
3090 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3091 | list_del_init(&oo->oo_close_lru); | |
3092 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3093 | if (status) { | |
3094 | release_openowner(oo); | |
3095 | open->op_openowner = NULL; | |
3096 | } else | |
3097 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3098 | } | |
3099 | } | |
32513b40 BF |
3100 | if (open->op_file) |
3101 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3102 | if (open->op_stp) |
3103 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3104 | } |
3105 | ||
b37ad28b | 3106 | __be32 |
b591480b BF |
3107 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3108 | clientid_t *clid) | |
1da177e4 LT |
3109 | { |
3110 | struct nfs4_client *clp; | |
b37ad28b | 3111 | __be32 status; |
1da177e4 LT |
3112 | |
3113 | nfs4_lock_state(); | |
3114 | dprintk("process_renew(%08x/%08x): starting\n", | |
3115 | clid->cl_boot, clid->cl_id); | |
3116 | status = nfserr_stale_clientid; | |
3117 | if (STALE_CLIENTID(clid)) | |
3118 | goto out; | |
3119 | clp = find_confirmed_client(clid); | |
3120 | status = nfserr_expired; | |
3121 | if (clp == NULL) { | |
3122 | /* We assume the client took too long to RENEW. */ | |
3123 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3124 | goto out; | |
3125 | } | |
1da177e4 | 3126 | status = nfserr_cb_path_down; |
ea1da636 | 3127 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3128 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3129 | goto out; |
3130 | status = nfs_ok; | |
3131 | out: | |
3132 | nfs4_unlock_state(); | |
3133 | return status; | |
3134 | } | |
3135 | ||
c47d832b | 3136 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3137 | }; |
3138 | ||
33dcc481 JL |
3139 | static bool grace_ended; |
3140 | ||
a76b4319 | 3141 | static void |
af558e33 | 3142 | nfsd4_end_grace(void) |
a76b4319 | 3143 | { |
33dcc481 JL |
3144 | /* do nothing if grace period already ended */ |
3145 | if (grace_ended) | |
3146 | return; | |
3147 | ||
a76b4319 | 3148 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3149 | grace_ended = true; |
2a4317c5 | 3150 | nfsd4_record_grace_done(&init_net, boot_time); |
af558e33 | 3151 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3152 | /* |
3153 | * Now that every NFSv4 client has had the chance to recover and | |
3154 | * to see the (possibly new, possibly shorter) lease time, we | |
3155 | * can safely set the next grace time to the current lease time: | |
3156 | */ | |
3157 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3158 | } |
3159 | ||
fd39ca9a | 3160 | static time_t |
1da177e4 LT |
3161 | nfs4_laundromat(void) |
3162 | { | |
3163 | struct nfs4_client *clp; | |
fe0750e5 | 3164 | struct nfs4_openowner *oo; |
1da177e4 LT |
3165 | struct nfs4_delegation *dp; |
3166 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3167 | time_t cutoff = get_seconds() - nfsd4_lease; |
3168 | time_t t, clientid_val = nfsd4_lease; | |
3169 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3170 | |
3171 | nfs4_lock_state(); | |
3172 | ||
3173 | dprintk("NFSD: laundromat service - starting\n"); | |
33dcc481 | 3174 | nfsd4_end_grace(); |
36acb66b BH |
3175 | INIT_LIST_HEAD(&reaplist); |
3176 | spin_lock(&client_lock); | |
1da177e4 LT |
3177 | list_for_each_safe(pos, next, &client_lru) { |
3178 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3179 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3180 | t = clp->cl_time - cutoff; | |
3181 | if (clientid_val > t) | |
3182 | clientid_val = t; | |
3183 | break; | |
3184 | } | |
d7682988 BH |
3185 | if (atomic_read(&clp->cl_refcount)) { |
3186 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3187 | clp->cl_clientid.cl_id); | |
3188 | continue; | |
3189 | } | |
3190 | unhash_client_locked(clp); | |
3191 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3192 | } |
3193 | spin_unlock(&client_lock); | |
3194 | list_for_each_safe(pos, next, &reaplist) { | |
3195 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3196 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3197 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3198 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3199 | expire_client(clp); |
3200 | } | |
1da177e4 LT |
3201 | spin_lock(&recall_lock); |
3202 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3203 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3204 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3205 | u = dp->dl_time - cutoff; | |
3206 | if (test_val > u) | |
3207 | test_val = u; | |
3208 | break; | |
3209 | } | |
1da177e4 LT |
3210 | list_move(&dp->dl_recall_lru, &reaplist); |
3211 | } | |
3212 | spin_unlock(&recall_lock); | |
3213 | list_for_each_safe(pos, next, &reaplist) { | |
3214 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3215 | unhash_delegation(dp); |
3216 | } | |
cf07d2ea | 3217 | test_val = nfsd4_lease; |
1da177e4 | 3218 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3219 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3220 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3221 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3222 | if (test_val > u) |
3223 | test_val = u; | |
3224 | break; | |
3225 | } | |
fe0750e5 | 3226 | release_openowner(oo); |
1da177e4 LT |
3227 | } |
3228 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3229 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3230 | nfs4_unlock_state(); | |
3231 | return clientid_val; | |
3232 | } | |
3233 | ||
a254b246 HH |
3234 | static struct workqueue_struct *laundry_wq; |
3235 | static void laundromat_main(struct work_struct *); | |
3236 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3237 | ||
3238 | static void | |
c4028958 | 3239 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3240 | { |
3241 | time_t t; | |
3242 | ||
3243 | t = nfs4_laundromat(); | |
3244 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3245 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3246 | } |
3247 | ||
f7a4d872 | 3248 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3249 | { |
f7a4d872 BF |
3250 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3251 | return nfserr_bad_stateid; | |
3252 | return nfs_ok; | |
1da177e4 LT |
3253 | } |
3254 | ||
3255 | static int | |
3256 | STALE_STATEID(stateid_t *stateid) | |
3257 | { | |
d3b313a4 | 3258 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3259 | return 0; |
3260 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3261 | STATEID_VAL(stateid)); |
e4e83ea4 | 3262 | return 1; |
1da177e4 LT |
3263 | } |
3264 | ||
3265 | static inline int | |
3266 | access_permit_read(unsigned long access_bmap) | |
3267 | { | |
3268 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3269 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3270 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3271 | } | |
3272 | ||
3273 | static inline int | |
3274 | access_permit_write(unsigned long access_bmap) | |
3275 | { | |
3276 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3277 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3278 | } | |
3279 | ||
3280 | static | |
dcef0413 | 3281 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3282 | { |
b37ad28b | 3283 | __be32 status = nfserr_openmode; |
1da177e4 | 3284 | |
02921914 BF |
3285 | /* For lock stateid's, we test the parent open, not the lock: */ |
3286 | if (stp->st_openstp) | |
3287 | stp = stp->st_openstp; | |
1da177e4 LT |
3288 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3289 | goto out; | |
3290 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3291 | goto out; | |
3292 | status = nfs_ok; | |
3293 | out: | |
3294 | return status; | |
3295 | } | |
3296 | ||
b37ad28b | 3297 | static inline __be32 |
1da177e4 LT |
3298 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3299 | { | |
203a8c8e | 3300 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3301 | return nfs_ok; |
af558e33 | 3302 | else if (locks_in_grace()) { |
25985edc | 3303 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3304 | * conflicting state; so we must wait out the grace period. */ |
3305 | return nfserr_grace; | |
3306 | } else if (flags & WR_STATE) | |
3307 | return nfs4_share_conflict(current_fh, | |
3308 | NFS4_SHARE_DENY_WRITE); | |
3309 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3310 | return nfs4_share_conflict(current_fh, | |
3311 | NFS4_SHARE_DENY_READ); | |
3312 | } | |
3313 | ||
3314 | /* | |
3315 | * Allow READ/WRITE during grace period on recovered state only for files | |
3316 | * that are not able to provide mandatory locking. | |
3317 | */ | |
3318 | static inline int | |
18f82731 | 3319 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3320 | { |
203a8c8e | 3321 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3322 | } |
3323 | ||
81b82965 BF |
3324 | /* Returns true iff a is later than b: */ |
3325 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3326 | { | |
3327 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3328 | } | |
3329 | ||
57b7b43b | 3330 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3331 | { |
6668958f AA |
3332 | /* |
3333 | * When sessions are used the stateid generation number is ignored | |
3334 | * when it is zero. | |
3335 | */ | |
28dde241 | 3336 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3337 | return nfs_ok; |
3338 | ||
3339 | if (in->si_generation == ref->si_generation) | |
3340 | return nfs_ok; | |
6668958f | 3341 | |
0836f587 | 3342 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3343 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3344 | return nfserr_bad_stateid; |
3345 | /* | |
81b82965 BF |
3346 | * However, we could see a stateid from the past, even from a |
3347 | * non-buggy client. For example, if the client sends a lock | |
3348 | * while some IO is outstanding, the lock may bump si_generation | |
3349 | * while the IO is still in flight. The client could avoid that | |
3350 | * situation by waiting for responses on all the IO requests, | |
3351 | * but better performance may result in retrying IO that | |
3352 | * receives an old_stateid error if requests are rarely | |
3353 | * reordered in flight: | |
0836f587 | 3354 | */ |
81b82965 | 3355 | return nfserr_old_stateid; |
0836f587 BF |
3356 | } |
3357 | ||
38c2f4b1 | 3358 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3359 | { |
97b7e3b6 BF |
3360 | struct nfs4_stid *s; |
3361 | struct nfs4_ol_stateid *ols; | |
3362 | __be32 status; | |
17456804 BS |
3363 | |
3364 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3365 | return nfserr_stale_stateid; |
17456804 | 3366 | |
38c2f4b1 | 3367 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3368 | if (!s) |
3369 | return nfserr_stale_stateid; | |
36279ac1 | 3370 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3371 | if (status) |
97b7e3b6 BF |
3372 | return status; |
3373 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3374 | return nfs_ok; | |
3375 | ols = openlockstateid(s); | |
3376 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3377 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3378 | return nfserr_bad_stateid; |
3379 | return nfs_ok; | |
17456804 BS |
3380 | } |
3381 | ||
38c2f4b1 BF |
3382 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3383 | { | |
3384 | struct nfs4_client *cl; | |
3385 | ||
3386 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3387 | return nfserr_bad_stateid; | |
3388 | if (STALE_STATEID(stateid)) | |
3389 | return nfserr_stale_stateid; | |
3390 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3391 | if (!cl) | |
3392 | return nfserr_expired; | |
3393 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3394 | if (!*s) | |
3395 | return nfserr_bad_stateid; | |
3396 | return nfs_ok; | |
3397 | ||
3398 | } | |
3399 | ||
1da177e4 LT |
3400 | /* |
3401 | * Checks for stateid operations | |
3402 | */ | |
b37ad28b | 3403 | __be32 |
dd453dfd BH |
3404 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3405 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3406 | { |
69064a27 | 3407 | struct nfs4_stid *s; |
dcef0413 | 3408 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3409 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3410 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3411 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3412 | __be32 status; |
1da177e4 | 3413 | |
1da177e4 LT |
3414 | if (filpp) |
3415 | *filpp = NULL; | |
3416 | ||
18f82731 | 3417 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3418 | return nfserr_grace; |
3419 | ||
3420 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3421 | return check_special_stateids(current_fh, stateid, flags); | |
3422 | ||
38c2f4b1 BF |
3423 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3424 | if (status) | |
3425 | return status; | |
69064a27 BF |
3426 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3427 | if (status) | |
3428 | goto out; | |
f7a4d872 BF |
3429 | switch (s->sc_type) { |
3430 | case NFS4_DELEG_STID: | |
69064a27 | 3431 | dp = delegstateid(s); |
dc9bf700 BF |
3432 | status = nfs4_check_delegmode(dp, flags); |
3433 | if (status) | |
3434 | goto out; | |
43b0178e | 3435 | if (filpp) { |
acfdf5c3 | 3436 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3437 | BUG_ON(!*filpp); |
3438 | } | |
f7a4d872 BF |
3439 | break; |
3440 | case NFS4_OPEN_STID: | |
3441 | case NFS4_LOCK_STID: | |
69064a27 | 3442 | stp = openlockstateid(s); |
f7a4d872 BF |
3443 | status = nfs4_check_fh(current_fh, stp); |
3444 | if (status) | |
1da177e4 | 3445 | goto out; |
fe0750e5 | 3446 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3447 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3448 | goto out; |
a4455be0 BF |
3449 | status = nfs4_check_openmode(stp, flags); |
3450 | if (status) | |
1da177e4 | 3451 | goto out; |
f9d7562f BF |
3452 | if (filpp) { |
3453 | if (flags & RD_STATE) | |
3454 | *filpp = find_readable_file(stp->st_file); | |
3455 | else | |
3456 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3457 | } |
f7a4d872 BF |
3458 | break; |
3459 | default: | |
3460 | return nfserr_bad_stateid; | |
1da177e4 LT |
3461 | } |
3462 | status = nfs_ok; | |
3463 | out: | |
3464 | return status; | |
3465 | } | |
3466 | ||
e1ca12df | 3467 | static __be32 |
dcef0413 | 3468 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3469 | { |
fe0750e5 | 3470 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3471 | return nfserr_locks_held; |
3472 | release_lock_stateid(stp); | |
3473 | return nfs_ok; | |
3474 | } | |
3475 | ||
17456804 BS |
3476 | /* |
3477 | * Test if the stateid is valid | |
3478 | */ | |
3479 | __be32 | |
3480 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3481 | struct nfsd4_test_stateid *test_stateid) | |
3482 | { | |
03cfb420 BS |
3483 | struct nfsd4_test_stateid_id *stateid; |
3484 | struct nfs4_client *cl = cstate->session->se_client; | |
3485 | ||
3486 | nfs4_lock_state(); | |
3487 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
3488 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); | |
3489 | nfs4_unlock_state(); | |
3490 | ||
17456804 BS |
3491 | return nfs_ok; |
3492 | } | |
3493 | ||
e1ca12df BS |
3494 | __be32 |
3495 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3496 | struct nfsd4_free_stateid *free_stateid) | |
3497 | { | |
3498 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3499 | struct nfs4_stid *s; |
38c2f4b1 | 3500 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3501 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3502 | |
3503 | nfs4_lock_state(); | |
38c2f4b1 | 3504 | s = find_stateid(cl, stateid); |
2da1cec7 | 3505 | if (!s) |
81b82965 | 3506 | goto out; |
2da1cec7 BF |
3507 | switch (s->sc_type) { |
3508 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3509 | ret = nfserr_locks_held; |
3510 | goto out; | |
2da1cec7 BF |
3511 | case NFS4_OPEN_STID: |
3512 | case NFS4_LOCK_STID: | |
3513 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3514 | if (ret) | |
3515 | goto out; | |
3516 | if (s->sc_type == NFS4_LOCK_STID) | |
3517 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3518 | else | |
3519 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3520 | break; |
3521 | default: | |
3522 | ret = nfserr_bad_stateid; | |
e1ca12df | 3523 | } |
e1ca12df BS |
3524 | out: |
3525 | nfs4_unlock_state(); | |
3526 | return ret; | |
3527 | } | |
3528 | ||
4c4cd222 N |
3529 | static inline int |
3530 | setlkflg (int type) | |
3531 | { | |
3532 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3533 | RD_STATE : WR_STATE; | |
3534 | } | |
1da177e4 | 3535 | |
dcef0413 | 3536 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3537 | { |
3538 | struct svc_fh *current_fh = &cstate->current_fh; | |
3539 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3540 | __be32 status; | |
3541 | ||
c0a5d93e BF |
3542 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3543 | if (status) | |
3544 | return status; | |
f7a4d872 BF |
3545 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3546 | /* | |
3547 | * "Closed" stateid's exist *only* to return | |
3548 | * nfserr_replay_me from the previous step. | |
3549 | */ | |
3550 | return nfserr_bad_stateid; | |
3551 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3552 | if (status) | |
3553 | return status; | |
3554 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3555 | } |
3556 | ||
1da177e4 LT |
3557 | /* |
3558 | * Checks for sequence id mutating operations. | |
3559 | */ | |
b37ad28b | 3560 | static __be32 |
dd453dfd | 3561 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3562 | stateid_t *stateid, char typemask, |
dcef0413 | 3563 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3564 | { |
0836f587 | 3565 | __be32 status; |
38c2f4b1 | 3566 | struct nfs4_stid *s; |
1da177e4 | 3567 | |
8c10cbdb BH |
3568 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3569 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3570 | |
1da177e4 | 3571 | *stpp = NULL; |
38c2f4b1 | 3572 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3573 | if (status) |
3574 | return status; | |
38c2f4b1 | 3575 | *stpp = openlockstateid(s); |
c0a5d93e | 3576 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3577 | |
c0a5d93e BF |
3578 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3579 | } | |
39325bd0 | 3580 | |
dcef0413 | 3581 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3582 | { |
3583 | __be32 status; | |
3584 | struct nfs4_openowner *oo; | |
1da177e4 | 3585 | |
c0a5d93e | 3586 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3587 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3588 | if (status) |
3589 | return status; | |
c0a5d93e | 3590 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3591 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3592 | return nfserr_bad_stateid; |
3a4f98bb | 3593 | return nfs_ok; |
1da177e4 LT |
3594 | } |
3595 | ||
b37ad28b | 3596 | __be32 |
ca364317 | 3597 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3598 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3599 | { |
b37ad28b | 3600 | __be32 status; |
fe0750e5 | 3601 | struct nfs4_openowner *oo; |
dcef0413 | 3602 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3603 | |
3604 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3605 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3606 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3607 | |
ca364317 | 3608 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3609 | if (status) |
3610 | return status; | |
1da177e4 LT |
3611 | |
3612 | nfs4_lock_state(); | |
3613 | ||
9072d5c6 | 3614 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3615 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3616 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3617 | if (status) |
68b66e82 | 3618 | goto out; |
fe0750e5 | 3619 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3620 | status = nfserr_bad_stateid; |
dad1c067 | 3621 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3622 | goto out; |
dad1c067 | 3623 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3624 | update_stateid(&stp->st_stid.sc_stateid); |
3625 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3626 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3627 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3628 | |
2a4317c5 | 3629 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3630 | status = nfs_ok; |
1da177e4 | 3631 | out: |
5ec094c1 BF |
3632 | if (!cstate->replay_owner) |
3633 | nfs4_unlock_state(); | |
1da177e4 LT |
3634 | return status; |
3635 | } | |
3636 | ||
6409a5a6 | 3637 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3638 | { |
6409a5a6 BF |
3639 | if (!test_bit(access, &stp->st_access_bmap)) |
3640 | return; | |
3641 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
3642 | __clear_bit(access, &stp->st_access_bmap); | |
3643 | } | |
f197c271 | 3644 | |
6409a5a6 BF |
3645 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3646 | { | |
3647 | switch (to_access) { | |
3648 | case NFS4_SHARE_ACCESS_READ: | |
3649 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3650 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3651 | break; | |
3652 | case NFS4_SHARE_ACCESS_WRITE: | |
3653 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3654 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3655 | break; | |
3656 | case NFS4_SHARE_ACCESS_BOTH: | |
3657 | break; | |
3658 | default: | |
3659 | BUG(); | |
1da177e4 LT |
3660 | } |
3661 | } | |
3662 | ||
3663 | static void | |
3664 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3665 | { | |
3666 | int i; | |
3667 | for (i = 0; i < 4; i++) { | |
3668 | if ((i & deny) != i) | |
3669 | __clear_bit(i, bmap); | |
3670 | } | |
3671 | } | |
3672 | ||
b37ad28b | 3673 | __be32 |
ca364317 BF |
3674 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3675 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3676 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3677 | { |
b37ad28b | 3678 | __be32 status; |
dcef0413 | 3679 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3680 | |
3681 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3682 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3683 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3684 | |
c30e92df | 3685 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3686 | if (od->od_deleg_want) |
3687 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3688 | od->od_deleg_want); | |
1da177e4 LT |
3689 | |
3690 | nfs4_lock_state(); | |
c0a5d93e BF |
3691 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3692 | &od->od_stateid, &stp); | |
9072d5c6 | 3693 | if (status) |
1da177e4 | 3694 | goto out; |
1da177e4 LT |
3695 | status = nfserr_inval; |
3696 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3697 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3698 | stp->st_access_bmap, od->od_share_access); | |
3699 | goto out; | |
3700 | } | |
3701 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3702 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3703 | stp->st_deny_bmap, od->od_share_deny); | |
3704 | goto out; | |
3705 | } | |
6409a5a6 | 3706 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3707 | |
1da177e4 LT |
3708 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3709 | ||
dcef0413 BF |
3710 | update_stateid(&stp->st_stid.sc_stateid); |
3711 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3712 | status = nfs_ok; |
3713 | out: | |
5ec094c1 BF |
3714 | if (!cstate->replay_owner) |
3715 | nfs4_unlock_state(); | |
1da177e4 LT |
3716 | return status; |
3717 | } | |
3718 | ||
38c387b5 BF |
3719 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3720 | { | |
3721 | struct nfs4_openowner *oo; | |
3722 | struct nfs4_ol_stateid *s; | |
3723 | ||
3724 | if (!so->so_is_open_owner) | |
3725 | return; | |
3726 | oo = openowner(so); | |
3727 | s = oo->oo_last_closed_stid; | |
3728 | if (!s) | |
3729 | return; | |
3730 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3731 | /* Release the last_closed_stid on the next seqid bump: */ | |
3732 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3733 | return; | |
3734 | } | |
3735 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3736 | release_last_closed_stateid(oo); |
3737 | } | |
3738 | ||
3739 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3740 | { | |
3741 | unhash_open_stateid(s); | |
3742 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3743 | } |
3744 | ||
1da177e4 LT |
3745 | /* |
3746 | * nfs4_unlock_state() called after encode | |
3747 | */ | |
b37ad28b | 3748 | __be32 |
ca364317 | 3749 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3750 | struct nfsd4_close *close) |
1da177e4 | 3751 | { |
b37ad28b | 3752 | __be32 status; |
fe0750e5 | 3753 | struct nfs4_openowner *oo; |
dcef0413 | 3754 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3755 | |
3756 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3757 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3758 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3759 | |
3760 | nfs4_lock_state(); | |
f7a4d872 BF |
3761 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3762 | &close->cl_stateid, | |
3763 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3764 | &stp); | |
9072d5c6 | 3765 | if (status) |
1da177e4 | 3766 | goto out; |
fe0750e5 | 3767 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3768 | status = nfs_ok; |
dcef0413 BF |
3769 | update_stateid(&stp->st_stid.sc_stateid); |
3770 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3771 | |
f7a4d872 | 3772 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3773 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3774 | |
3775 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3776 | * released by the laundromat service after the lease period | |
3777 | * to enable us to handle CLOSE replay | |
3778 | */ | |
fe0750e5 BF |
3779 | if (list_empty(&oo->oo_owner.so_stateids)) |
3780 | move_to_close_lru(oo); | |
1da177e4 | 3781 | out: |
5ec094c1 BF |
3782 | if (!cstate->replay_owner) |
3783 | nfs4_unlock_state(); | |
1da177e4 LT |
3784 | return status; |
3785 | } | |
3786 | ||
b37ad28b | 3787 | __be32 |
ca364317 BF |
3788 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3789 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3790 | { |
203a8c8e BF |
3791 | struct nfs4_delegation *dp; |
3792 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3793 | struct nfs4_stid *s; |
203a8c8e | 3794 | struct inode *inode; |
b37ad28b | 3795 | __be32 status; |
1da177e4 | 3796 | |
ca364317 | 3797 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3798 | return status; |
3799 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3800 | |
3801 | nfs4_lock_state(); | |
38c2f4b1 BF |
3802 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3803 | if (status) | |
203a8c8e | 3804 | goto out; |
38c2f4b1 | 3805 | dp = delegstateid(s); |
d5477a8d | 3806 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3807 | if (status) |
3808 | goto out; | |
203a8c8e BF |
3809 | |
3810 | unhash_delegation(dp); | |
1da177e4 | 3811 | out: |
203a8c8e BF |
3812 | nfs4_unlock_state(); |
3813 | ||
1da177e4 LT |
3814 | return status; |
3815 | } | |
3816 | ||
3817 | ||
1da177e4 | 3818 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3819 | |
009673b4 BF |
3820 | #define LOCKOWNER_INO_HASH_BITS 8 |
3821 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3822 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3823 | |
87df4de8 BH |
3824 | static inline u64 |
3825 | end_offset(u64 start, u64 len) | |
3826 | { | |
3827 | u64 end; | |
3828 | ||
3829 | end = start + len; | |
3830 | return end >= start ? end: NFS4_MAX_UINT64; | |
3831 | } | |
3832 | ||
3833 | /* last octet in a range */ | |
3834 | static inline u64 | |
3835 | last_byte_offset(u64 start, u64 len) | |
3836 | { | |
3837 | u64 end; | |
3838 | ||
3839 | BUG_ON(!len); | |
3840 | end = start + len; | |
3841 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3842 | } | |
3843 | ||
009673b4 | 3844 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3845 | { |
3846 | return (file_hashval(inode) + cl_id | |
3847 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3848 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3849 | } |
3850 | ||
009673b4 | 3851 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3852 | |
1da177e4 LT |
3853 | /* |
3854 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3855 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3856 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3857 | * locking, this prevents us from being completely protocol-compliant. The | |
3858 | * real solution to this problem is to start using unsigned file offsets in | |
3859 | * the VFS, but this is a very deep change! | |
3860 | */ | |
3861 | static inline void | |
3862 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3863 | { | |
3864 | if (lock->fl_start < 0) | |
3865 | lock->fl_start = OFFSET_MAX; | |
3866 | if (lock->fl_end < 0) | |
3867 | lock->fl_end = OFFSET_MAX; | |
3868 | } | |
3869 | ||
d5b9026a N |
3870 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3871 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3872 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3873 | }; |
1da177e4 LT |
3874 | |
3875 | static inline void | |
3876 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3877 | { | |
fe0750e5 | 3878 | struct nfs4_lockowner *lo; |
1da177e4 | 3879 | |
d5b9026a | 3880 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3881 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3882 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3883 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3884 | if (!deny->ld_owner.data) |
3885 | /* We just don't care that much */ | |
3886 | goto nevermind; | |
fe0750e5 BF |
3887 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3888 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3889 | } else { |
7c13f344 BF |
3890 | nevermind: |
3891 | deny->ld_owner.len = 0; | |
3892 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3893 | deny->ld_clientid.cl_boot = 0; |
3894 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3895 | } |
3896 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3897 | deny->ld_length = NFS4_MAX_UINT64; |
3898 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3899 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3900 | deny->ld_type = NFS4_READ_LT; | |
3901 | if (fl->fl_type != F_RDLCK) | |
3902 | deny->ld_type = NFS4_WRITE_LT; | |
3903 | } | |
3904 | ||
b93d87c1 BF |
3905 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3906 | { | |
3907 | struct nfs4_ol_stateid *lst; | |
3908 | ||
3909 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3910 | return false; | |
3911 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3912 | struct nfs4_ol_stateid, st_perstateowner); | |
3913 | return lst->st_file->fi_inode == inode; | |
3914 | } | |
3915 | ||
fe0750e5 BF |
3916 | static struct nfs4_lockowner * |
3917 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3918 | struct xdr_netobj *owner) |
3919 | { | |
009673b4 | 3920 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3921 | struct nfs4_lockowner *lo; |
1da177e4 | 3922 | |
009673b4 | 3923 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3924 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3925 | return lo; | |
1da177e4 LT |
3926 | } |
3927 | return NULL; | |
3928 | } | |
3929 | ||
dcef0413 | 3930 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3931 | { |
009673b4 BF |
3932 | struct inode *inode = open_stp->st_file->fi_inode; |
3933 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3934 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3935 | ||
16bfdaaf | 3936 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3937 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3938 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3939 | } |
3940 | ||
1da177e4 LT |
3941 | /* |
3942 | * Alloc a lock owner structure. | |
3943 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3944 | * occurred. |
1da177e4 | 3945 | * |
16bfdaaf | 3946 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3947 | */ |
3948 | ||
fe0750e5 | 3949 | static struct nfs4_lockowner * |
dcef0413 | 3950 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3951 | struct nfs4_lockowner *lo; |
1da177e4 | 3952 | |
fe0750e5 BF |
3953 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3954 | if (!lo) | |
1da177e4 | 3955 | return NULL; |
fe0750e5 BF |
3956 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3957 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3958 | /* It is the openowner seqid that will be incremented in encode in the |
3959 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3960 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3961 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3962 | return lo; | |
1da177e4 LT |
3963 | } |
3964 | ||
dcef0413 BF |
3965 | static struct nfs4_ol_stateid * |
3966 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 3967 | { |
dcef0413 | 3968 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 3969 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 3970 | |
996e0938 | 3971 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 3972 | if (stp == NULL) |
6136d2b4 | 3973 | return NULL; |
996e0938 | 3974 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 3975 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3976 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3977 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 3978 | get_nfs4_file(fp); |
1da177e4 | 3979 | stp->st_file = fp; |
0997b173 | 3980 | stp->st_access_bmap = 0; |
1da177e4 | 3981 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3982 | stp->st_openstp = open_stp; |
1da177e4 LT |
3983 | return stp; |
3984 | } | |
3985 | ||
fd39ca9a | 3986 | static int |
1da177e4 LT |
3987 | check_lock_length(u64 offset, u64 length) |
3988 | { | |
87df4de8 | 3989 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3990 | LOFF_OVERFLOW(offset, length))); |
3991 | } | |
3992 | ||
dcef0413 | 3993 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
3994 | { |
3995 | struct nfs4_file *fp = lock_stp->st_file; | |
3996 | int oflag = nfs4_access_to_omode(access); | |
3997 | ||
3998 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3999 | return; | |
4000 | nfs4_file_get_access(fp, oflag); | |
4001 | __set_bit(access, &lock_stp->st_access_bmap); | |
4002 | } | |
4003 | ||
2355c596 | 4004 | 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 |
4005 | { |
4006 | struct nfs4_file *fi = ost->st_file; | |
4007 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4008 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4009 | struct nfs4_lockowner *lo; | |
4010 | unsigned int strhashval; | |
4011 | ||
4012 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4013 | if (lo) { | |
4014 | if (!cstate->minorversion) | |
4015 | return nfserr_bad_seqid; | |
4016 | /* XXX: a lockowner always has exactly one stateid: */ | |
4017 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4018 | struct nfs4_ol_stateid, st_perstateowner); | |
4019 | return nfs_ok; | |
4020 | } | |
16bfdaaf | 4021 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4022 | &lock->v.new.owner); |
4023 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4024 | if (lo == NULL) | |
4025 | return nfserr_jukebox; | |
4026 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4027 | if (*lst == NULL) { | |
4028 | release_lockowner(lo); | |
4029 | return nfserr_jukebox; | |
4030 | } | |
4031 | *new = true; | |
4032 | return nfs_ok; | |
4033 | } | |
4034 | ||
1da177e4 LT |
4035 | /* |
4036 | * LOCK operation | |
4037 | */ | |
b37ad28b | 4038 | __be32 |
ca364317 | 4039 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4040 | struct nfsd4_lock *lock) |
1da177e4 | 4041 | { |
fe0750e5 BF |
4042 | struct nfs4_openowner *open_sop = NULL; |
4043 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4044 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4045 | struct file *filp = NULL; |
1da177e4 | 4046 | struct file_lock file_lock; |
8dc7c311 | 4047 | struct file_lock conflock; |
b37ad28b | 4048 | __be32 status = 0; |
64a284d0 | 4049 | bool new_state = false; |
b34f27aa | 4050 | int lkflg; |
b8dd7b9a | 4051 | int err; |
1da177e4 LT |
4052 | |
4053 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4054 | (long long) lock->lk_offset, | |
4055 | (long long) lock->lk_length); | |
4056 | ||
1da177e4 LT |
4057 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4058 | return nfserr_inval; | |
4059 | ||
ca364317 | 4060 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4061 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4062 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4063 | return status; | |
4064 | } | |
4065 | ||
1da177e4 LT |
4066 | nfs4_lock_state(); |
4067 | ||
4068 | if (lock->lk_is_new) { | |
893f8770 N |
4069 | /* |
4070 | * Client indicates that this is a new lockowner. | |
4071 | * Use open owner and open stateid to create lock owner and | |
4072 | * lock stateid. | |
4073 | */ | |
dcef0413 | 4074 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4075 | |
4076 | if (nfsd4_has_session(cstate)) | |
4077 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4078 | memcpy(&lock->v.new.clientid, | |
4079 | &cstate->session->se_client->cl_clientid, | |
4080 | sizeof(clientid_t)); | |
4081 | ||
1da177e4 | 4082 | status = nfserr_stale_clientid; |
684e5638 | 4083 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4084 | goto out; |
1da177e4 | 4085 | |
1da177e4 | 4086 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4087 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4088 | lock->lk_new_open_seqid, |
4089 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4090 | &open_stp); |
37515177 | 4091 | if (status) |
1da177e4 | 4092 | goto out; |
fe0750e5 | 4093 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4094 | status = nfserr_bad_stateid; |
684e5638 | 4095 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4096 | &lock->v.new.clientid)) |
4097 | goto out; | |
64a284d0 BF |
4098 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4099 | &lock_stp, &new_state); | |
4100 | if (status) | |
1da177e4 | 4101 | goto out; |
1da177e4 LT |
4102 | } else { |
4103 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4104 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4105 | lock->lk_old_lock_seqid, |
4106 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4107 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4108 | if (status) |
4109 | goto out; | |
4110 | } | |
64a284d0 | 4111 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4112 | |
b34f27aa BF |
4113 | lkflg = setlkflg(lock->lk_type); |
4114 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4115 | if (status) | |
4116 | goto out; | |
4117 | ||
0dd395dc | 4118 | status = nfserr_grace; |
af558e33 | 4119 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4120 | goto out; |
4121 | status = nfserr_no_grace; | |
af558e33 | 4122 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4123 | goto out; |
4124 | ||
1da177e4 LT |
4125 | locks_init_lock(&file_lock); |
4126 | switch (lock->lk_type) { | |
4127 | case NFS4_READ_LT: | |
4128 | case NFS4_READW_LT: | |
0997b173 BF |
4129 | filp = find_readable_file(lock_stp->st_file); |
4130 | if (filp) | |
4131 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4132 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4133 | break; |
1da177e4 LT |
4134 | case NFS4_WRITE_LT: |
4135 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4136 | filp = find_writeable_file(lock_stp->st_file); |
4137 | if (filp) | |
4138 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4139 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4140 | break; |
1da177e4 LT |
4141 | default: |
4142 | status = nfserr_inval; | |
4143 | goto out; | |
4144 | } | |
f9d7562f BF |
4145 | if (!filp) { |
4146 | status = nfserr_openmode; | |
4147 | goto out; | |
4148 | } | |
b59e3c0e | 4149 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4150 | file_lock.fl_pid = current->tgid; |
4151 | file_lock.fl_file = filp; | |
4152 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4153 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4154 | |
4155 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4156 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4157 | nfs4_transform_lock_offset(&file_lock); |
4158 | ||
4159 | /* | |
4160 | * Try to lock the file in the VFS. | |
4161 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4162 | */ | |
4163 | ||
529d7b2a | 4164 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4165 | switch (-err) { |
1da177e4 | 4166 | case 0: /* success! */ |
dcef0413 BF |
4167 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4168 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4169 | sizeof(stateid_t)); |
b8dd7b9a | 4170 | status = 0; |
eb76b3fd AA |
4171 | break; |
4172 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4173 | status = nfserr_denied; | |
4174 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4175 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4176 | break; | |
1da177e4 LT |
4177 | case (EDEADLK): |
4178 | status = nfserr_deadlock; | |
eb76b3fd | 4179 | break; |
3e772463 | 4180 | default: |
fd85b817 | 4181 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4182 | status = nfserrno(err); |
eb76b3fd | 4183 | break; |
1da177e4 | 4184 | } |
1da177e4 | 4185 | out: |
64a284d0 | 4186 | if (status && new_state) |
f044ff83 | 4187 | release_lockowner(lock_sop); |
5ec094c1 BF |
4188 | if (!cstate->replay_owner) |
4189 | nfs4_unlock_state(); | |
1da177e4 LT |
4190 | return status; |
4191 | } | |
4192 | ||
55ef1274 BF |
4193 | /* |
4194 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4195 | * so we do a temporary open here just to get an open file to pass to | |
4196 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4197 | * inode operation.) | |
4198 | */ | |
4199 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4200 | { | |
4201 | struct file *file; | |
4202 | int err; | |
4203 | ||
4204 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4205 | if (err) | |
4206 | return err; | |
4207 | err = vfs_test_lock(file, lock); | |
4208 | nfsd_close(file); | |
4209 | return err; | |
4210 | } | |
4211 | ||
1da177e4 LT |
4212 | /* |
4213 | * LOCKT operation | |
4214 | */ | |
b37ad28b | 4215 | __be32 |
ca364317 BF |
4216 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4217 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4218 | { |
4219 | struct inode *inode; | |
1da177e4 | 4220 | struct file_lock file_lock; |
fe0750e5 | 4221 | struct nfs4_lockowner *lo; |
fd85b817 | 4222 | int error; |
b37ad28b | 4223 | __be32 status; |
1da177e4 | 4224 | |
af558e33 | 4225 | if (locks_in_grace()) |
1da177e4 LT |
4226 | return nfserr_grace; |
4227 | ||
4228 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4229 | return nfserr_inval; | |
4230 | ||
1da177e4 LT |
4231 | nfs4_lock_state(); |
4232 | ||
4233 | status = nfserr_stale_clientid; | |
60adfc50 | 4234 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4235 | goto out; |
1da177e4 | 4236 | |
75c096f7 | 4237 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4238 | goto out; |
1da177e4 | 4239 | |
ca364317 | 4240 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4241 | locks_init_lock(&file_lock); |
4242 | switch (lockt->lt_type) { | |
4243 | case NFS4_READ_LT: | |
4244 | case NFS4_READW_LT: | |
4245 | file_lock.fl_type = F_RDLCK; | |
4246 | break; | |
4247 | case NFS4_WRITE_LT: | |
4248 | case NFS4_WRITEW_LT: | |
4249 | file_lock.fl_type = F_WRLCK; | |
4250 | break; | |
4251 | default: | |
2fdada03 | 4252 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4253 | status = nfserr_inval; |
4254 | goto out; | |
4255 | } | |
4256 | ||
fe0750e5 BF |
4257 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4258 | if (lo) | |
4259 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4260 | file_lock.fl_pid = current->tgid; |
4261 | file_lock.fl_flags = FL_POSIX; | |
4262 | ||
4263 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4264 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4265 | |
4266 | nfs4_transform_lock_offset(&file_lock); | |
4267 | ||
1da177e4 | 4268 | status = nfs_ok; |
55ef1274 | 4269 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4270 | if (error) { |
4271 | status = nfserrno(error); | |
4272 | goto out; | |
4273 | } | |
9d6a8c5c | 4274 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4275 | status = nfserr_denied; |
9d6a8c5c | 4276 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4277 | } |
4278 | out: | |
4279 | nfs4_unlock_state(); | |
4280 | return status; | |
4281 | } | |
4282 | ||
b37ad28b | 4283 | __be32 |
ca364317 | 4284 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4285 | struct nfsd4_locku *locku) |
1da177e4 | 4286 | { |
dcef0413 | 4287 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4288 | struct file *filp = NULL; |
4289 | struct file_lock file_lock; | |
b37ad28b | 4290 | __be32 status; |
b8dd7b9a | 4291 | int err; |
1da177e4 LT |
4292 | |
4293 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4294 | (long long) locku->lu_offset, | |
4295 | (long long) locku->lu_length); | |
4296 | ||
4297 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4298 | return nfserr_inval; | |
4299 | ||
4300 | nfs4_lock_state(); | |
4301 | ||
9072d5c6 | 4302 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4303 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4304 | if (status) |
1da177e4 | 4305 | goto out; |
f9d7562f BF |
4306 | filp = find_any_file(stp->st_file); |
4307 | if (!filp) { | |
4308 | status = nfserr_lock_range; | |
4309 | goto out; | |
4310 | } | |
1da177e4 LT |
4311 | BUG_ON(!filp); |
4312 | locks_init_lock(&file_lock); | |
4313 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4314 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4315 | file_lock.fl_pid = current->tgid; |
4316 | file_lock.fl_file = filp; | |
4317 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4318 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4319 | file_lock.fl_start = locku->lu_offset; |
4320 | ||
87df4de8 | 4321 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4322 | nfs4_transform_lock_offset(&file_lock); |
4323 | ||
4324 | /* | |
4325 | * Try to unlock the file in the VFS. | |
4326 | */ | |
fd85b817 | 4327 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4328 | if (err) { |
fd85b817 | 4329 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4330 | goto out_nfserr; |
4331 | } | |
4332 | /* | |
4333 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4334 | */ | |
dcef0413 BF |
4335 | update_stateid(&stp->st_stid.sc_stateid); |
4336 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4337 | |
4338 | out: | |
71c3bcd7 BF |
4339 | if (!cstate->replay_owner) |
4340 | nfs4_unlock_state(); | |
1da177e4 LT |
4341 | return status; |
4342 | ||
4343 | out_nfserr: | |
b8dd7b9a | 4344 | status = nfserrno(err); |
1da177e4 LT |
4345 | goto out; |
4346 | } | |
4347 | ||
4348 | /* | |
4349 | * returns | |
4350 | * 1: locks held by lockowner | |
4351 | * 0: no locks held by lockowner | |
4352 | */ | |
4353 | static int | |
fe0750e5 | 4354 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4355 | { |
4356 | struct file_lock **flpp; | |
f9d7562f | 4357 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4358 | int status = 0; |
4359 | ||
b89f4321 | 4360 | lock_flocks(); |
1da177e4 | 4361 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4362 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4363 | status = 1; |
4364 | goto out; | |
796dadfd | 4365 | } |
1da177e4 LT |
4366 | } |
4367 | out: | |
b89f4321 | 4368 | unlock_flocks(); |
1da177e4 LT |
4369 | return status; |
4370 | } | |
4371 | ||
b37ad28b | 4372 | __be32 |
b591480b BF |
4373 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4374 | struct nfsd4_compound_state *cstate, | |
4375 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4376 | { |
4377 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4378 | struct nfs4_stateowner *sop; |
fe0750e5 | 4379 | struct nfs4_lockowner *lo; |
dcef0413 | 4380 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4381 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4382 | struct list_head matches; |
16bfdaaf | 4383 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4384 | __be32 status; |
1da177e4 LT |
4385 | |
4386 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4387 | clid->cl_boot, clid->cl_id); | |
4388 | ||
4389 | /* XXX check for lease expiration */ | |
4390 | ||
4391 | status = nfserr_stale_clientid; | |
849823c5 | 4392 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4393 | return status; |
1da177e4 LT |
4394 | |
4395 | nfs4_lock_state(); | |
4396 | ||
3e9e3dbe | 4397 | status = nfserr_locks_held; |
3e9e3dbe | 4398 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4399 | |
16bfdaaf BF |
4400 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4401 | if (sop->so_is_open_owner) | |
4402 | continue; | |
06f1f864 BF |
4403 | if (!same_owner_str(sop, owner, clid)) |
4404 | continue; | |
4405 | list_for_each_entry(stp, &sop->so_stateids, | |
4406 | st_perstateowner) { | |
4407 | lo = lockowner(sop); | |
4408 | if (check_for_locks(stp->st_file, lo)) | |
4409 | goto out; | |
4410 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4411 | } |
3e9e3dbe N |
4412 | } |
4413 | /* Clients probably won't expect us to return with some (but not all) | |
4414 | * of the lockowner state released; so don't release any until all | |
4415 | * have been checked. */ | |
4416 | status = nfs_ok; | |
0fa822e4 | 4417 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4418 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4419 | lo_list); | |
0fa822e4 N |
4420 | /* unhash_stateowner deletes so_perclient only |
4421 | * for openowners. */ | |
fe0750e5 BF |
4422 | list_del(&lo->lo_list); |
4423 | release_lockowner(lo); | |
1da177e4 LT |
4424 | } |
4425 | out: | |
4426 | nfs4_unlock_state(); | |
4427 | return status; | |
4428 | } | |
4429 | ||
4430 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4431 | alloc_reclaim(void) |
1da177e4 | 4432 | { |
a55370a3 | 4433 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4434 | } |
4435 | ||
c7b9a459 | 4436 | int |
a1bcecd2 | 4437 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4438 | { |
4439 | unsigned int strhashval = clientstr_hashval(name); | |
4440 | struct nfs4_client *clp; | |
4441 | ||
e203d506 | 4442 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4443 | if (!clp) |
4444 | return 0; | |
a52d726b | 4445 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4446 | } |
4447 | ||
1da177e4 LT |
4448 | /* |
4449 | * failure => all reset bets are off, nfserr_no_grace... | |
4450 | */ | |
190e4fbf N |
4451 | int |
4452 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4453 | { |
4454 | unsigned int strhashval; | |
4455 | struct nfs4_client_reclaim *crp = NULL; | |
4456 | ||
a55370a3 N |
4457 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4458 | crp = alloc_reclaim(); | |
1da177e4 LT |
4459 | if (!crp) |
4460 | return 0; | |
a55370a3 | 4461 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4462 | INIT_LIST_HEAD(&crp->cr_strhash); |
4463 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4464 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4465 | reclaim_str_hashtbl_size++; |
4466 | return 1; | |
4467 | } | |
4468 | ||
2a4317c5 | 4469 | void |
1da177e4 LT |
4470 | nfs4_release_reclaim(void) |
4471 | { | |
4472 | struct nfs4_client_reclaim *crp = NULL; | |
4473 | int i; | |
4474 | ||
1da177e4 LT |
4475 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4476 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4477 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4478 | struct nfs4_client_reclaim, cr_strhash); | |
4479 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4480 | kfree(crp); |
4481 | reclaim_str_hashtbl_size--; | |
4482 | } | |
4483 | } | |
4484 | BUG_ON(reclaim_str_hashtbl_size); | |
4485 | } | |
4486 | ||
4487 | /* | |
4488 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4489 | struct nfs4_client_reclaim * |
a52d726b | 4490 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4491 | { |
4492 | unsigned int strhashval; | |
1da177e4 LT |
4493 | struct nfs4_client_reclaim *crp = NULL; |
4494 | ||
a55370a3 N |
4495 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4496 | clp->cl_name.len, clp->cl_name.data, | |
4497 | clp->cl_recdir); | |
1da177e4 LT |
4498 | |
4499 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4500 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4501 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4502 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4503 | return crp; |
4504 | } | |
4505 | } | |
4506 | return NULL; | |
4507 | } | |
4508 | ||
4509 | /* | |
4510 | * Called from OPEN. Look for clientid in reclaim list. | |
4511 | */ | |
b37ad28b | 4512 | __be32 |
1da177e4 LT |
4513 | nfs4_check_open_reclaim(clientid_t *clid) |
4514 | { | |
a52d726b JL |
4515 | struct nfs4_client *clp; |
4516 | ||
4517 | /* find clientid in conf_id_hashtbl */ | |
4518 | clp = find_confirmed_client(clid); | |
4519 | if (clp == NULL) | |
4520 | return nfserr_reclaim_bad; | |
4521 | ||
4522 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4523 | } |
4524 | ||
65178db4 BS |
4525 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4526 | ||
4527 | void nfsd_forget_clients(u64 num) | |
4528 | { | |
4529 | struct nfs4_client *clp, *next; | |
4530 | int count = 0; | |
4531 | ||
4532 | nfs4_lock_state(); | |
4533 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4534 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4535 | expire_client(clp); |
4536 | if (++count == num) | |
4537 | break; | |
4538 | } | |
4539 | nfs4_unlock_state(); | |
4540 | ||
4541 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4542 | } | |
4543 | ||
4544 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4545 | { | |
4546 | release_lockowner(lockowner(sop)); | |
4547 | } | |
4548 | ||
4549 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4550 | { | |
4551 | release_openowner(openowner(sop)); | |
4552 | } | |
4553 | ||
353de31b | 4554 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4555 | void (*release_sop)(struct nfs4_stateowner *)) |
4556 | { | |
4557 | int i, count = 0; | |
4558 | struct nfs4_stateowner *sop, *next; | |
4559 | ||
16bfdaaf BF |
4560 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4561 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4562 | if (sop->so_is_open_owner != is_open_owner) | |
4563 | continue; | |
65178db4 BS |
4564 | release_sop(sop); |
4565 | if (++count == num) | |
4566 | return count; | |
4567 | } | |
4568 | } | |
4569 | return count; | |
4570 | } | |
4571 | ||
4572 | void nfsd_forget_locks(u64 num) | |
4573 | { | |
4574 | int count; | |
4575 | ||
4576 | nfs4_lock_state(); | |
16bfdaaf | 4577 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4578 | nfs4_unlock_state(); |
4579 | ||
4580 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4581 | } | |
4582 | ||
4583 | void nfsd_forget_openowners(u64 num) | |
4584 | { | |
4585 | int count; | |
4586 | ||
4587 | nfs4_lock_state(); | |
16bfdaaf | 4588 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4589 | nfs4_unlock_state(); |
4590 | ||
4591 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4592 | } | |
4593 | ||
4594 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4595 | { | |
4596 | int i, count = 0; | |
2d3475c0 BS |
4597 | struct nfs4_file *fp, *fnext; |
4598 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4599 | |
4600 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4601 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4602 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4603 | deleg_func(dp); |
4604 | if (++count == num) | |
4605 | return count; | |
4606 | } | |
4607 | } | |
4608 | } | |
2d3475c0 | 4609 | |
65178db4 BS |
4610 | return count; |
4611 | } | |
4612 | ||
4613 | void nfsd_forget_delegations(u64 num) | |
4614 | { | |
4615 | unsigned int count; | |
4616 | ||
4617 | nfs4_lock_state(); | |
4618 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4619 | nfs4_unlock_state(); | |
4620 | ||
4621 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4622 | } | |
4623 | ||
4624 | void nfsd_recall_delegations(u64 num) | |
4625 | { | |
4626 | unsigned int count; | |
4627 | ||
4628 | nfs4_lock_state(); | |
4629 | spin_lock(&recall_lock); | |
4630 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4631 | spin_unlock(&recall_lock); | |
4632 | nfs4_unlock_state(); | |
4633 | ||
4634 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4635 | } | |
4636 | ||
4637 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4638 | ||
ac4d8ff2 | 4639 | /* initialization to perform at module load time: */ |
1da177e4 | 4640 | |
72083396 | 4641 | void |
ac4d8ff2 | 4642 | nfs4_state_init(void) |
1da177e4 | 4643 | { |
72083396 | 4644 | int i; |
1da177e4 | 4645 | |
1da177e4 LT |
4646 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4647 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4648 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4649 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4650 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4651 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4652 | } |
5282fd72 ME |
4653 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4654 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4655 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4656 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4657 | } | |
16bfdaaf BF |
4658 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4659 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4660 | } |
009673b4 BF |
4661 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4662 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4663 | INIT_LIST_HEAD(&close_lru); |
4664 | INIT_LIST_HEAD(&client_lru); | |
4665 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4666 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4667 | } |
4668 | ||
c2f1a551 MS |
4669 | /* |
4670 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4671 | * client may quite reasonably hang on to a delegation as long as it has | |
4672 | * the inode cached. This becomes an obvious problem the first time a | |
4673 | * client's inode cache approaches the size of the server's total memory. | |
4674 | * | |
4675 | * For now we avoid this problem by imposing a hard limit on the number | |
4676 | * of delegations, which varies according to the server's memory size. | |
4677 | */ | |
4678 | static void | |
4679 | set_max_delegations(void) | |
4680 | { | |
4681 | /* | |
4682 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4683 | * estimates suggest that in the worst case (where every delegation | |
4684 | * is for a different inode), a delegation could take about 1.5K, | |
4685 | * giving a worst case usage of about 6% of memory. | |
4686 | */ | |
4687 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4688 | } | |
4689 | ||
ac4d8ff2 N |
4690 | /* initialization to perform when the nfsd service is started: */ |
4691 | ||
a6d6b781 JL |
4692 | int |
4693 | nfs4_state_start(void) | |
ac4d8ff2 | 4694 | { |
b5a1a81e BF |
4695 | int ret; |
4696 | ||
2a4317c5 JL |
4697 | /* |
4698 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4699 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4700 | * need to pass a net pointer into this function, take a reference | |
4701 | * to that instead and then do most of the rest of this on a per-net | |
4702 | * basis. | |
4703 | */ | |
4704 | get_net(&init_net); | |
4705 | nfsd4_client_tracking_init(&init_net); | |
1da177e4 | 4706 | boot_time = get_seconds(); |
af558e33 | 4707 | locks_start_grace(&nfsd4_manager); |
33dcc481 | 4708 | grace_ended = false; |
9a8db97e | 4709 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4710 | nfsd4_grace); |
b5a1a81e | 4711 | ret = set_callback_cred(); |
a6d6b781 JL |
4712 | if (ret) { |
4713 | ret = -ENOMEM; | |
4714 | goto out_recovery; | |
4715 | } | |
58da282b | 4716 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4717 | if (laundry_wq == NULL) { |
4718 | ret = -ENOMEM; | |
4719 | goto out_recovery; | |
4720 | } | |
b5a1a81e BF |
4721 | ret = nfsd4_create_callback_queue(); |
4722 | if (ret) | |
4723 | goto out_free_laundry; | |
e46b498c | 4724 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4725 | set_max_delegations(); |
b5a1a81e BF |
4726 | return 0; |
4727 | out_free_laundry: | |
4728 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4729 | out_recovery: |
2a4317c5 JL |
4730 | nfsd4_client_tracking_exit(&init_net); |
4731 | put_net(&init_net); | |
b5a1a81e | 4732 | return ret; |
1da177e4 LT |
4733 | } |
4734 | ||
1da177e4 LT |
4735 | static void |
4736 | __nfs4_state_shutdown(void) | |
4737 | { | |
4738 | int i; | |
4739 | struct nfs4_client *clp = NULL; | |
4740 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4741 | struct list_head *pos, *next, reaplist; |
4742 | ||
1da177e4 LT |
4743 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4744 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4745 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4746 | expire_client(clp); | |
4747 | } | |
4748 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4749 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4750 | expire_client(clp); | |
4751 | } | |
4752 | } | |
4753 | INIT_LIST_HEAD(&reaplist); | |
4754 | spin_lock(&recall_lock); | |
4755 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4756 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4757 | list_move(&dp->dl_recall_lru, &reaplist); | |
4758 | } | |
4759 | spin_unlock(&recall_lock); | |
4760 | list_for_each_safe(pos, next, &reaplist) { | |
4761 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4762 | unhash_delegation(dp); |
4763 | } | |
4764 | ||
2a4317c5 JL |
4765 | nfsd4_client_tracking_exit(&init_net); |
4766 | put_net(&init_net); | |
1da177e4 LT |
4767 | } |
4768 | ||
4769 | void | |
4770 | nfs4_state_shutdown(void) | |
4771 | { | |
afe2c511 | 4772 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4773 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4774 | locks_end_grace(&nfsd4_manager); |
1da177e4 | 4775 | nfs4_lock_state(); |
1da177e4 | 4776 | __nfs4_state_shutdown(); |
1da177e4 | 4777 | nfs4_unlock_state(); |
c3935e30 | 4778 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4779 | } |
8b70484c TM |
4780 | |
4781 | static void | |
4782 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4783 | { | |
37c593c5 TM |
4784 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4785 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4786 | } |
4787 | ||
4788 | static void | |
4789 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4790 | { | |
37c593c5 TM |
4791 | if (cstate->minorversion) { |
4792 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4793 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4794 | } | |
4795 | } | |
4796 | ||
4797 | void | |
4798 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4799 | { | |
4800 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4801 | } |
4802 | ||
62cd4a59 TM |
4803 | /* |
4804 | * functions to set current state id | |
4805 | */ | |
9428fe1a TM |
4806 | void |
4807 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4808 | { | |
4809 | put_stateid(cstate, &odp->od_stateid); | |
4810 | } | |
4811 | ||
8b70484c TM |
4812 | void |
4813 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4814 | { | |
4815 | put_stateid(cstate, &open->op_stateid); | |
4816 | } | |
4817 | ||
62cd4a59 TM |
4818 | void |
4819 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4820 | { | |
4821 | put_stateid(cstate, &close->cl_stateid); | |
4822 | } | |
4823 | ||
4824 | void | |
4825 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4826 | { | |
4827 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4828 | } | |
4829 | ||
4830 | /* | |
4831 | * functions to consume current state id | |
4832 | */ | |
1e97b519 | 4833 | |
9428fe1a TM |
4834 | void |
4835 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4836 | { | |
4837 | get_stateid(cstate, &odp->od_stateid); | |
4838 | } | |
4839 | ||
4840 | void | |
4841 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4842 | { | |
4843 | get_stateid(cstate, &drp->dr_stateid); | |
4844 | } | |
4845 | ||
1e97b519 TM |
4846 | void |
4847 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4848 | { | |
4849 | get_stateid(cstate, &fsp->fr_stateid); | |
4850 | } | |
4851 | ||
4852 | void | |
4853 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4854 | { | |
4855 | get_stateid(cstate, &setattr->sa_stateid); | |
4856 | } | |
4857 | ||
8b70484c TM |
4858 | void |
4859 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4860 | { | |
4861 | get_stateid(cstate, &close->cl_stateid); | |
4862 | } | |
4863 | ||
4864 | void | |
62cd4a59 | 4865 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4866 | { |
62cd4a59 | 4867 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4868 | } |
30813e27 TM |
4869 | |
4870 | void | |
4871 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4872 | { | |
4873 | get_stateid(cstate, &read->rd_stateid); | |
4874 | } | |
4875 | ||
4876 | void | |
4877 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4878 | { | |
4879 | get_stateid(cstate, &write->wr_stateid); | |
4880 | } |