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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
bfa4b365 | 45 | #include "current_stateid.h" |
1da177e4 LT |
46 | |
47 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
48 | ||
49 | /* Globals */ | |
cf07d2ea | 50 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 51 | time_t nfsd4_grace = 90; |
fd39ca9a | 52 | static time_t boot_time; |
f32f3c2d BF |
53 | |
54 | #define all_ones {{~0,~0},~0} | |
55 | static const stateid_t one_stateid = { | |
56 | .si_generation = ~0, | |
57 | .si_opaque = all_ones, | |
58 | }; | |
59 | static const stateid_t zero_stateid = { | |
60 | /* all fields zero */ | |
61 | }; | |
19ff0f28 TM |
62 | static const stateid_t currentstateid = { |
63 | .si_generation = 1, | |
64 | }; | |
f32f3c2d | 65 | |
ec6b5d7b | 66 | static u64 current_sessionid = 1; |
fd39ca9a | 67 | |
f32f3c2d BF |
68 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
69 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 70 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
1da177e4 | 71 | |
1da177e4 | 72 | /* forward declarations */ |
fe0750e5 | 73 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 74 | |
8b671b80 BF |
75 | /* Locking: */ |
76 | ||
77 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 78 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 79 | |
8b671b80 BF |
80 | /* |
81 | * Currently used for the del_recall_lru and file hash table. In an | |
82 | * effort to decrease the scope of the client_mutex, this spinlock may | |
83 | * eventually cover more: | |
84 | */ | |
85 | static DEFINE_SPINLOCK(recall_lock); | |
86 | ||
fe0750e5 BF |
87 | static struct kmem_cache *openowner_slab = NULL; |
88 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
89 | static struct kmem_cache *file_slab = NULL; |
90 | static struct kmem_cache *stateid_slab = NULL; | |
91 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 92 | |
1da177e4 LT |
93 | void |
94 | nfs4_lock_state(void) | |
95 | { | |
353ab6e9 | 96 | mutex_lock(&client_mutex); |
1da177e4 LT |
97 | } |
98 | ||
508dc6e1 BH |
99 | static void free_session(struct kref *); |
100 | ||
101 | /* Must be called under the client_lock */ | |
102 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
103 | { | |
104 | kref_put(&ses->se_ref, free_session); | |
105 | } | |
106 | ||
107 | static void nfsd4_get_session(struct nfsd4_session *ses) | |
108 | { | |
109 | kref_get(&ses->se_ref); | |
110 | } | |
111 | ||
1da177e4 LT |
112 | void |
113 | nfs4_unlock_state(void) | |
114 | { | |
353ab6e9 | 115 | mutex_unlock(&client_mutex); |
1da177e4 LT |
116 | } |
117 | ||
118 | static inline u32 | |
119 | opaque_hashval(const void *ptr, int nbytes) | |
120 | { | |
121 | unsigned char *cptr = (unsigned char *) ptr; | |
122 | ||
123 | u32 x = 0; | |
124 | while (nbytes--) { | |
125 | x *= 37; | |
126 | x += *cptr++; | |
127 | } | |
128 | return x; | |
129 | } | |
130 | ||
1da177e4 LT |
131 | static struct list_head del_recall_lru; |
132 | ||
32513b40 BF |
133 | static void nfsd4_free_file(struct nfs4_file *f) |
134 | { | |
135 | kmem_cache_free(file_slab, f); | |
136 | } | |
137 | ||
13cd2184 N |
138 | static inline void |
139 | put_nfs4_file(struct nfs4_file *fi) | |
140 | { | |
8b671b80 BF |
141 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
142 | list_del(&fi->fi_hash); | |
143 | spin_unlock(&recall_lock); | |
144 | iput(fi->fi_inode); | |
32513b40 | 145 | nfsd4_free_file(fi); |
8b671b80 | 146 | } |
13cd2184 N |
147 | } |
148 | ||
149 | static inline void | |
150 | get_nfs4_file(struct nfs4_file *fi) | |
151 | { | |
8b671b80 | 152 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
153 | } |
154 | ||
ef0f3390 | 155 | static int num_delegations; |
c2f1a551 | 156 | unsigned int max_delegations; |
ef0f3390 N |
157 | |
158 | /* | |
159 | * Open owner state (share locks) | |
160 | */ | |
161 | ||
16bfdaaf BF |
162 | /* hash tables for lock and open owners */ |
163 | #define OWNER_HASH_BITS 8 | |
164 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
165 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 166 | |
16bfdaaf | 167 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
168 | { |
169 | unsigned int ret; | |
170 | ||
171 | ret = opaque_hashval(ownername->data, ownername->len); | |
172 | ret += clientid; | |
16bfdaaf | 173 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 174 | } |
ef0f3390 | 175 | |
16bfdaaf | 176 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
ef0f3390 N |
177 | |
178 | /* hash table for nfs4_file */ | |
179 | #define FILE_HASH_BITS 8 | |
180 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 181 | |
ddc04c41 BF |
182 | static unsigned int file_hashval(struct inode *ino) |
183 | { | |
184 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
185 | return hash_ptr(ino, FILE_HASH_BITS); | |
186 | } | |
187 | ||
ef0f3390 | 188 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 189 | |
998db52c | 190 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
191 | { |
192 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
193 | atomic_inc(&fp->fi_access[oflag]); | |
194 | } | |
195 | ||
998db52c BF |
196 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
197 | { | |
198 | if (oflag == O_RDWR) { | |
199 | __nfs4_file_get_access(fp, O_RDONLY); | |
200 | __nfs4_file_get_access(fp, O_WRONLY); | |
201 | } else | |
202 | __nfs4_file_get_access(fp, oflag); | |
203 | } | |
204 | ||
205 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
206 | { |
207 | if (fp->fi_fds[oflag]) { | |
208 | fput(fp->fi_fds[oflag]); | |
209 | fp->fi_fds[oflag] = NULL; | |
210 | } | |
211 | } | |
212 | ||
998db52c | 213 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
214 | { |
215 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
f9d7562f | 216 | nfs4_file_put_fd(fp, oflag); |
3d02fa29 BF |
217 | /* |
218 | * It's also safe to get rid of the RDWR open *if* | |
219 | * we no longer have need of the other kind of access | |
220 | * or if we already have the other kind of open: | |
221 | */ | |
222 | if (fp->fi_fds[1-oflag] | |
223 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) | |
224 | nfs4_file_put_fd(fp, O_RDWR); | |
f9d7562f BF |
225 | } |
226 | } | |
227 | ||
998db52c BF |
228 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
229 | { | |
230 | if (oflag == O_RDWR) { | |
231 | __nfs4_file_put_access(fp, O_RDONLY); | |
232 | __nfs4_file_put_access(fp, O_WRONLY); | |
233 | } else | |
234 | __nfs4_file_put_access(fp, oflag); | |
235 | } | |
236 | ||
6136d2b4 | 237 | static inline int get_new_stid(struct nfs4_stid *stid) |
36d44c60 | 238 | { |
6136d2b4 | 239 | static int min_stateid = 0; |
38c2f4b1 | 240 | struct idr *stateids = &stid->sc_client->cl_stateids; |
6136d2b4 BF |
241 | int new_stid; |
242 | int error; | |
243 | ||
38c2f4b1 | 244 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
6136d2b4 | 245 | /* |
996e0938 BF |
246 | * Note: the necessary preallocation was done in |
247 | * nfs4_alloc_stateid(). The idr code caps the number of | |
248 | * preallocations that can exist at a time, but the state lock | |
249 | * prevents anyone from using ours before we get here: | |
6136d2b4 BF |
250 | */ |
251 | BUG_ON(error); | |
252 | /* | |
253 | * It shouldn't be a problem to reuse an opaque stateid value. | |
254 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
255 | * example, a stray write retransmission could be accepted by | |
256 | * the server when it should have been rejected. Therefore, | |
257 | * adopt a trick from the sctp code to attempt to maximize the | |
258 | * amount of time until an id is reused, by ensuring they always | |
259 | * "increase" (mod INT_MAX): | |
260 | */ | |
36d44c60 | 261 | |
6136d2b4 BF |
262 | min_stateid = new_stid+1; |
263 | if (min_stateid == INT_MAX) | |
264 | min_stateid = 0; | |
265 | return new_stid; | |
36d44c60 BF |
266 | } |
267 | ||
996e0938 | 268 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
2a74aba7 BF |
269 | { |
270 | stateid_t *s = &stid->sc_stateid; | |
6136d2b4 | 271 | int new_id; |
2a74aba7 BF |
272 | |
273 | stid->sc_type = type; | |
274 | stid->sc_client = cl; | |
275 | s->si_opaque.so_clid = cl->cl_clientid; | |
6136d2b4 | 276 | new_id = get_new_stid(stid); |
6136d2b4 | 277 | s->si_opaque.so_id = (u32)new_id; |
2a74aba7 BF |
278 | /* Will be incremented before return to client: */ |
279 | s->si_generation = 0; | |
996e0938 BF |
280 | } |
281 | ||
282 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) | |
283 | { | |
284 | struct idr *stateids = &cl->cl_stateids; | |
285 | ||
286 | if (!idr_pre_get(stateids, GFP_KERNEL)) | |
287 | return NULL; | |
288 | /* | |
289 | * Note: if we fail here (or any time between now and the time | |
290 | * we actually get the new idr), we won't need to undo the idr | |
291 | * preallocation, since the idr code caps the number of | |
292 | * preallocated entries. | |
293 | */ | |
294 | return kmem_cache_alloc(slab, GFP_KERNEL); | |
2a74aba7 BF |
295 | } |
296 | ||
4cdc951b BF |
297 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
298 | { | |
299 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); | |
300 | } | |
301 | ||
1da177e4 | 302 | static struct nfs4_delegation * |
dcef0413 | 303 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
1da177e4 LT |
304 | { |
305 | struct nfs4_delegation *dp; | |
306 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
307 | |
308 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
309 | /* |
310 | * Major work on the lease subsystem (for example, to support | |
311 | * calbacks on stat) will be required before we can support | |
312 | * write delegations properly. | |
313 | */ | |
314 | if (type != NFS4_OPEN_DELEGATE_READ) | |
315 | return NULL; | |
47f9940c MS |
316 | if (fp->fi_had_conflict) |
317 | return NULL; | |
c2f1a551 | 318 | if (num_delegations > max_delegations) |
ef0f3390 | 319 | return NULL; |
996e0938 | 320 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
5b2d21c1 | 321 | if (dp == NULL) |
1da177e4 | 322 | return dp; |
996e0938 | 323 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
2a74aba7 BF |
324 | /* |
325 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
326 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
327 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
328 | */ |
329 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ef0f3390 | 330 | num_delegations++; |
ea1da636 N |
331 | INIT_LIST_HEAD(&dp->dl_perfile); |
332 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 333 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
13cd2184 | 334 | get_nfs4_file(fp); |
1da177e4 | 335 | dp->dl_file = fp; |
1da177e4 | 336 | dp->dl_type = type; |
6c02eaa1 | 337 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
338 | dp->dl_time = 0; |
339 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 340 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
341 | return dp; |
342 | } | |
343 | ||
344 | void | |
345 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
346 | { | |
347 | if (atomic_dec_and_test(&dp->dl_count)) { | |
348 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 349 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 350 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 351 | num_delegations--; |
1da177e4 LT |
352 | } |
353 | } | |
354 | ||
acfdf5c3 | 355 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 356 | { |
acfdf5c3 BF |
357 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
358 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
359 | fp->fi_lease = NULL; | |
4ee63624 | 360 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
361 | fp->fi_deleg_file = NULL; |
362 | } | |
1da177e4 LT |
363 | } |
364 | ||
6136d2b4 BF |
365 | static void unhash_stid(struct nfs4_stid *s) |
366 | { | |
38c2f4b1 BF |
367 | struct idr *stateids = &s->sc_client->cl_stateids; |
368 | ||
369 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); | |
6136d2b4 BF |
370 | } |
371 | ||
1da177e4 LT |
372 | /* Called under the state lock. */ |
373 | static void | |
374 | unhash_delegation(struct nfs4_delegation *dp) | |
375 | { | |
6136d2b4 | 376 | unhash_stid(&dp->dl_stid); |
ea1da636 | 377 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 378 | spin_lock(&recall_lock); |
5d926e8c | 379 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
380 | list_del_init(&dp->dl_recall_lru); |
381 | spin_unlock(&recall_lock); | |
acfdf5c3 | 382 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
383 | nfs4_put_delegation(dp); |
384 | } | |
385 | ||
386 | /* | |
387 | * SETCLIENTID state | |
388 | */ | |
389 | ||
36acb66b | 390 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
391 | static DEFINE_SPINLOCK(client_lock); |
392 | ||
1da177e4 LT |
393 | /* Hash tables for nfs4_clientid state */ |
394 | #define CLIENT_HASH_BITS 4 | |
395 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
396 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
397 | ||
ddc04c41 BF |
398 | static unsigned int clientid_hashval(u32 id) |
399 | { | |
400 | return id & CLIENT_HASH_MASK; | |
401 | } | |
402 | ||
403 | static unsigned int clientstr_hashval(const char *name) | |
404 | { | |
405 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
406 | } | |
407 | ||
1da177e4 LT |
408 | /* |
409 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
410 | * used in reboot/reset lease grace period processing | |
411 | * | |
412 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
413 | * setclientid_confirmed info. | |
414 | * | |
415 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
416 | * setclientid info. | |
417 | * | |
418 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
419 | * for lease renewal. | |
420 | * | |
421 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
422 | * for last close replay. | |
423 | */ | |
424 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
425 | static int reclaim_str_hashtbl_size = 0; | |
426 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
427 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
428 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
429 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
430 | static struct list_head client_lru; | |
431 | static struct list_head close_lru; | |
432 | ||
f9d7562f BF |
433 | /* |
434 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
435 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
436 | * only what share bits are currently in force, but also what | |
437 | * combinations of share bits previous opens have used. This allows us | |
438 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
439 | * return an error if the client attempt to downgrade to a combination | |
440 | * of share bits not explicable by closing some of its previous opens. | |
441 | * | |
442 | * XXX: This enforcement is actually incomplete, since we don't keep | |
443 | * track of access/deny bit combinations; so, e.g., we allow: | |
444 | * | |
445 | * OPEN allow read, deny write | |
446 | * OPEN allow both, deny none | |
447 | * DOWNGRADE allow read, deny none | |
448 | * | |
449 | * which we should reject. | |
450 | */ | |
5ae037e5 JL |
451 | static unsigned int |
452 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 453 | int i; |
5ae037e5 | 454 | unsigned int access = 0; |
f9d7562f | 455 | |
f9d7562f BF |
456 | for (i = 1; i < 4; i++) { |
457 | if (test_bit(i, &bmap)) | |
5ae037e5 | 458 | access |= i; |
f9d7562f | 459 | } |
5ae037e5 | 460 | return access; |
f9d7562f BF |
461 | } |
462 | ||
3a328614 | 463 | static bool |
dcef0413 | 464 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
f9d7562f BF |
465 | unsigned int access, deny; |
466 | ||
5ae037e5 JL |
467 | access = bmap_to_share_mode(stp->st_access_bmap); |
468 | deny = bmap_to_share_mode(stp->st_deny_bmap); | |
f9d7562f | 469 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
3a328614 JL |
470 | return false; |
471 | return true; | |
f9d7562f BF |
472 | } |
473 | ||
82c5ff1b JL |
474 | /* set share access for a given stateid */ |
475 | static inline void | |
476 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
477 | { | |
478 | __set_bit(access, &stp->st_access_bmap); | |
479 | } | |
480 | ||
481 | /* clear share access for a given stateid */ | |
482 | static inline void | |
483 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
484 | { | |
485 | __clear_bit(access, &stp->st_access_bmap); | |
486 | } | |
487 | ||
488 | /* test whether a given stateid has access */ | |
489 | static inline bool | |
490 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
491 | { | |
492 | return test_bit(access, &stp->st_access_bmap); | |
493 | } | |
494 | ||
ce0fc43c JL |
495 | /* set share deny for a given stateid */ |
496 | static inline void | |
497 | set_deny(u32 access, struct nfs4_ol_stateid *stp) | |
498 | { | |
499 | __set_bit(access, &stp->st_deny_bmap); | |
500 | } | |
501 | ||
502 | /* clear share deny for a given stateid */ | |
503 | static inline void | |
504 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) | |
505 | { | |
506 | __clear_bit(access, &stp->st_deny_bmap); | |
507 | } | |
508 | ||
509 | /* test whether a given stateid is denying specific access */ | |
510 | static inline bool | |
511 | test_deny(u32 access, struct nfs4_ol_stateid *stp) | |
512 | { | |
513 | return test_bit(access, &stp->st_deny_bmap); | |
514 | } | |
515 | ||
f9d7562f BF |
516 | static int nfs4_access_to_omode(u32 access) |
517 | { | |
8f34a430 | 518 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
519 | case NFS4_SHARE_ACCESS_READ: |
520 | return O_RDONLY; | |
521 | case NFS4_SHARE_ACCESS_WRITE: | |
522 | return O_WRONLY; | |
523 | case NFS4_SHARE_ACCESS_BOTH: | |
524 | return O_RDWR; | |
525 | } | |
526 | BUG(); | |
527 | } | |
528 | ||
82c5ff1b JL |
529 | /* release all access and file references for a given stateid */ |
530 | static void | |
531 | release_all_access(struct nfs4_ol_stateid *stp) | |
532 | { | |
533 | int i; | |
534 | ||
535 | for (i = 1; i < 4; i++) { | |
536 | if (test_access(i, stp)) | |
537 | nfs4_file_put_access(stp->st_file, | |
538 | nfs4_access_to_omode(i)); | |
539 | clear_access(i, stp); | |
540 | } | |
541 | } | |
542 | ||
dcef0413 | 543 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 544 | { |
529d7b2a BF |
545 | list_del(&stp->st_perfile); |
546 | list_del(&stp->st_perstateowner); | |
547 | } | |
548 | ||
dcef0413 | 549 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 550 | { |
82c5ff1b | 551 | release_all_access(stp); |
a96e5b90 | 552 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
553 | stp->st_file = NULL; |
554 | } | |
555 | ||
dcef0413 | 556 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
4665e2ba | 557 | { |
529d7b2a BF |
558 | kmem_cache_free(stateid_slab, stp); |
559 | } | |
560 | ||
dcef0413 | 561 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a BF |
562 | { |
563 | struct file *file; | |
564 | ||
565 | unhash_generic_stateid(stp); | |
6136d2b4 | 566 | unhash_stid(&stp->st_stid); |
529d7b2a BF |
567 | file = find_any_file(stp->st_file); |
568 | if (file) | |
fe0750e5 | 569 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
38c387b5 | 570 | close_generic_stateid(stp); |
529d7b2a BF |
571 | free_generic_stateid(stp); |
572 | } | |
573 | ||
fe0750e5 | 574 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 575 | { |
dcef0413 | 576 | struct nfs4_ol_stateid *stp; |
529d7b2a | 577 | |
fe0750e5 BF |
578 | list_del(&lo->lo_owner.so_strhash); |
579 | list_del(&lo->lo_perstateid); | |
009673b4 | 580 | list_del(&lo->lo_owner_ino_hash); |
fe0750e5 BF |
581 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
582 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
dcef0413 | 583 | struct nfs4_ol_stateid, st_perstateowner); |
529d7b2a BF |
584 | release_lock_stateid(stp); |
585 | } | |
586 | } | |
587 | ||
fe0750e5 | 588 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 589 | { |
fe0750e5 BF |
590 | unhash_lockowner(lo); |
591 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
592 | } |
593 | ||
594 | static void | |
dcef0413 | 595 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
529d7b2a | 596 | { |
fe0750e5 | 597 | struct nfs4_lockowner *lo; |
529d7b2a BF |
598 | |
599 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
600 | lo = list_entry(open_stp->st_lockowners.next, |
601 | struct nfs4_lockowner, lo_perstateid); | |
602 | release_lockowner(lo); | |
529d7b2a BF |
603 | } |
604 | } | |
605 | ||
38c387b5 | 606 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
2283963f BF |
607 | { |
608 | unhash_generic_stateid(stp); | |
609 | release_stateid_lockowners(stp); | |
38c387b5 BF |
610 | close_generic_stateid(stp); |
611 | } | |
612 | ||
613 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
614 | { | |
615 | unhash_open_stateid(stp); | |
6136d2b4 | 616 | unhash_stid(&stp->st_stid); |
2283963f BF |
617 | free_generic_stateid(stp); |
618 | } | |
619 | ||
fe0750e5 | 620 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca | 621 | { |
dcef0413 | 622 | struct nfs4_ol_stateid *stp; |
f1d110ca | 623 | |
fe0750e5 BF |
624 | list_del(&oo->oo_owner.so_strhash); |
625 | list_del(&oo->oo_perclient); | |
626 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
627 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
dcef0413 | 628 | struct nfs4_ol_stateid, st_perstateowner); |
f044ff83 | 629 | release_open_stateid(stp); |
f1d110ca BF |
630 | } |
631 | } | |
632 | ||
f7a4d872 BF |
633 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
634 | { | |
635 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; | |
636 | ||
637 | if (s) { | |
6136d2b4 | 638 | unhash_stid(&s->st_stid); |
f7a4d872 BF |
639 | free_generic_stateid(s); |
640 | oo->oo_last_closed_stid = NULL; | |
641 | } | |
642 | } | |
643 | ||
fe0750e5 | 644 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 645 | { |
fe0750e5 BF |
646 | unhash_openowner(oo); |
647 | list_del(&oo->oo_close_lru); | |
f7a4d872 | 648 | release_last_closed_stateid(oo); |
fe0750e5 | 649 | nfs4_free_openowner(oo); |
f1d110ca BF |
650 | } |
651 | ||
5282fd72 ME |
652 | #define SESSION_HASH_SIZE 512 |
653 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
654 | ||
655 | static inline int | |
656 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
657 | { | |
658 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
659 | ||
660 | return sid->sequence % SESSION_HASH_SIZE; | |
661 | } | |
662 | ||
8f199b82 | 663 | #ifdef NFSD_DEBUG |
5282fd72 ME |
664 | static inline void |
665 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
666 | { | |
667 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
668 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
669 | } | |
8f199b82 TM |
670 | #else |
671 | static inline void | |
672 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
673 | { | |
674 | } | |
675 | #endif | |
676 | ||
5282fd72 | 677 | |
ec6b5d7b AA |
678 | static void |
679 | gen_sessionid(struct nfsd4_session *ses) | |
680 | { | |
681 | struct nfs4_client *clp = ses->se_client; | |
682 | struct nfsd4_sessionid *sid; | |
683 | ||
684 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
685 | sid->clientid = clp->cl_clientid; | |
686 | sid->sequence = current_sessionid++; | |
687 | sid->reserved = 0; | |
688 | } | |
689 | ||
690 | /* | |
a649637c AA |
691 | * The protocol defines ca_maxresponssize_cached to include the size of |
692 | * the rpc header, but all we need to cache is the data starting after | |
693 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
694 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
695 | * value that is the number of bytes in our cache plus a few additional | |
696 | * bytes. In order to stay on the safe side, and not promise more than | |
697 | * we can cache, those additional bytes must be the minimum possible: 24 | |
698 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
699 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
700 | * for the SEQUENCE op response: | |
701 | */ | |
702 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
703 | ||
557ce264 AA |
704 | static void |
705 | free_session_slots(struct nfsd4_session *ses) | |
706 | { | |
707 | int i; | |
708 | ||
709 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
710 | kfree(ses->se_slots[i]); | |
711 | } | |
712 | ||
a649637c | 713 | /* |
efe0cb6d BF |
714 | * We don't actually need to cache the rpc and session headers, so we |
715 | * can allocate a little less for each slot: | |
716 | */ | |
717 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
718 | { | |
719 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
720 | } | |
721 | ||
5b6feee9 | 722 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 723 | { |
5b6feee9 BF |
724 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
725 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 726 | |
5b6feee9 BF |
727 | return size; |
728 | } | |
ec6b5d7b | 729 | |
5b6feee9 BF |
730 | /* |
731 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 732 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 733 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 734 | */ |
5b6feee9 | 735 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 736 | { |
5b6feee9 | 737 | int avail; |
ec6b5d7b | 738 | |
5b6feee9 | 739 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 740 | |
5b6feee9 BF |
741 | spin_lock(&nfsd_drc_lock); |
742 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
743 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
744 | num = min_t(int, num, avail / slotsize); | |
745 | nfsd_drc_mem_used += num * slotsize; | |
746 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 747 | |
5b6feee9 BF |
748 | return num; |
749 | } | |
ec6b5d7b | 750 | |
5b6feee9 BF |
751 | static void nfsd4_put_drc_mem(int slotsize, int num) |
752 | { | |
4bd9b0f4 | 753 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 754 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 755 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 756 | } |
ec6b5d7b | 757 | |
5b6feee9 BF |
758 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
759 | { | |
760 | struct nfsd4_session *new; | |
761 | int mem, i; | |
a649637c | 762 | |
5b6feee9 BF |
763 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
764 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
765 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 766 | |
5b6feee9 BF |
767 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
768 | if (!new) | |
769 | return NULL; | |
557ce264 | 770 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
771 | for (i = 0; i < numslots; i++) { |
772 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
773 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
774 | if (!new->se_slots[i]) | |
557ce264 | 775 | goto out_free; |
557ce264 | 776 | } |
5b6feee9 BF |
777 | return new; |
778 | out_free: | |
779 | while (i--) | |
780 | kfree(new->se_slots[i]); | |
781 | kfree(new); | |
782 | return NULL; | |
ec6b5d7b AA |
783 | } |
784 | ||
5b6feee9 | 785 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 786 | { |
5b6feee9 | 787 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 788 | |
5b6feee9 | 789 | new->maxreqs = numslots; |
d2b21743 MJ |
790 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
791 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
792 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
793 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
794 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
795 | } | |
ec6b5d7b | 796 | |
19cf5c02 BF |
797 | static void free_conn(struct nfsd4_conn *c) |
798 | { | |
799 | svc_xprt_put(c->cn_xprt); | |
800 | kfree(c); | |
801 | } | |
ec6b5d7b | 802 | |
19cf5c02 BF |
803 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
804 | { | |
805 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
806 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 807 | |
19cf5c02 BF |
808 | spin_lock(&clp->cl_lock); |
809 | if (!list_empty(&c->cn_persession)) { | |
810 | list_del(&c->cn_persession); | |
811 | free_conn(c); | |
812 | } | |
813 | spin_unlock(&clp->cl_lock); | |
eea49806 | 814 | nfsd4_probe_callback(clp); |
19cf5c02 | 815 | } |
ec6b5d7b | 816 | |
d29c374c | 817 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 818 | { |
c7662518 | 819 | struct nfsd4_conn *conn; |
ec6b5d7b | 820 | |
c7662518 BF |
821 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
822 | if (!conn) | |
db90681d | 823 | return NULL; |
c7662518 BF |
824 | svc_xprt_get(rqstp->rq_xprt); |
825 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 826 | conn->cn_flags = flags; |
db90681d BF |
827 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
828 | return conn; | |
829 | } | |
a649637c | 830 | |
328ead28 BF |
831 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
832 | { | |
833 | conn->cn_session = ses; | |
834 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
835 | } |
836 | ||
db90681d | 837 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 838 | { |
db90681d | 839 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 840 | |
c7662518 | 841 | spin_lock(&clp->cl_lock); |
328ead28 | 842 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 843 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
844 | } |
845 | ||
21b75b01 | 846 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 847 | { |
19cf5c02 | 848 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 849 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
850 | } |
851 | ||
1d1bc8f2 | 852 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 853 | { |
db90681d | 854 | struct nfsd4_conn *conn; |
21b75b01 | 855 | int ret; |
ec6b5d7b | 856 | |
1d1bc8f2 | 857 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
858 | if (!conn) |
859 | return nfserr_jukebox; | |
860 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
861 | ret = nfsd4_register_conn(conn); |
862 | if (ret) | |
863 | /* oops; xprt is already down: */ | |
864 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
865 | return nfs_ok; |
866 | } | |
ec6b5d7b | 867 | |
1d1bc8f2 BF |
868 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
869 | { | |
870 | u32 dir = NFS4_CDFC4_FORE; | |
871 | ||
872 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
873 | dir |= NFS4_CDFC4_BACK; | |
874 | ||
875 | return nfsd4_new_conn(rqstp, ses, dir); | |
876 | } | |
877 | ||
878 | /* must be called under client_lock */ | |
19cf5c02 | 879 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 880 | { |
19cf5c02 BF |
881 | struct nfs4_client *clp = s->se_client; |
882 | struct nfsd4_conn *c; | |
ec6b5d7b | 883 | |
19cf5c02 BF |
884 | spin_lock(&clp->cl_lock); |
885 | while (!list_empty(&s->se_conns)) { | |
886 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
887 | list_del_init(&c->cn_persession); | |
888 | spin_unlock(&clp->cl_lock); | |
557ce264 | 889 | |
19cf5c02 BF |
890 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
891 | free_conn(c); | |
ec6b5d7b | 892 | |
19cf5c02 BF |
893 | spin_lock(&clp->cl_lock); |
894 | } | |
895 | spin_unlock(&clp->cl_lock); | |
c7662518 | 896 | } |
ec6b5d7b | 897 | |
508dc6e1 | 898 | static void free_session(struct kref *kref) |
c7662518 BF |
899 | { |
900 | struct nfsd4_session *ses; | |
901 | int mem; | |
902 | ||
508dc6e1 | 903 | BUG_ON(!spin_is_locked(&client_lock)); |
c7662518 | 904 | ses = container_of(kref, struct nfsd4_session, se_ref); |
19cf5c02 | 905 | nfsd4_del_conns(ses); |
c7662518 BF |
906 | spin_lock(&nfsd_drc_lock); |
907 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
908 | nfsd_drc_mem_used -= mem; | |
909 | spin_unlock(&nfsd_drc_lock); | |
910 | free_session_slots(ses); | |
911 | kfree(ses); | |
912 | } | |
913 | ||
508dc6e1 BH |
914 | void nfsd4_put_session(struct nfsd4_session *ses) |
915 | { | |
916 | spin_lock(&client_lock); | |
917 | nfsd4_put_session_locked(ses); | |
918 | spin_unlock(&client_lock); | |
919 | } | |
920 | ||
ac7c46f2 | 921 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
922 | { |
923 | struct nfsd4_session *new; | |
924 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
925 | int numslots, slotsize; | |
57b7b43b | 926 | __be32 status; |
5b6feee9 BF |
927 | int idx; |
928 | ||
929 | /* | |
930 | * Note decreasing slot size below client's request may | |
931 | * make it difficult for client to function correctly, whereas | |
932 | * decreasing the number of slots will (just?) affect | |
933 | * performance. When short on memory we therefore prefer to | |
934 | * decrease number of slots instead of their size. | |
935 | */ | |
936 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
937 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
938 | if (numslots < 1) |
939 | return NULL; | |
5b6feee9 BF |
940 | |
941 | new = alloc_session(slotsize, numslots); | |
942 | if (!new) { | |
943 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 944 | return NULL; |
557ce264 | 945 | } |
5b6feee9 | 946 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 947 | |
ec6b5d7b AA |
948 | new->se_client = clp; |
949 | gen_sessionid(new); | |
ec6b5d7b | 950 | |
c7662518 BF |
951 | INIT_LIST_HEAD(&new->se_conns); |
952 | ||
ac7c46f2 | 953 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 954 | new->se_flags = cses->flags; |
8b5ce5cd | 955 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 956 | kref_init(&new->se_ref); |
5b6feee9 | 957 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 958 | spin_lock(&client_lock); |
ec6b5d7b | 959 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 960 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 961 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 962 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 963 | spin_unlock(&client_lock); |
ec6b5d7b | 964 | |
1d1bc8f2 | 965 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 966 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 | 967 | if (status) { |
508dc6e1 | 968 | spin_lock(&client_lock); |
c7662518 | 969 | free_session(&new->se_ref); |
508dc6e1 | 970 | spin_unlock(&client_lock); |
ac7c46f2 | 971 | return NULL; |
c7662518 | 972 | } |
dcbeaa68 | 973 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 974 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
975 | /* |
976 | * This is a little silly; with sessions there's no real | |
977 | * use for the callback address. Use the peer address | |
978 | * as a reasonable default for now, but consider fixing | |
979 | * the rpc client not to require an address in the | |
980 | * future: | |
981 | */ | |
edd76786 BF |
982 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
983 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 984 | } |
dcbeaa68 | 985 | nfsd4_probe_callback(clp); |
ac7c46f2 | 986 | return new; |
ec6b5d7b AA |
987 | } |
988 | ||
9089f1b4 | 989 | /* caller must hold client_lock */ |
5282fd72 ME |
990 | static struct nfsd4_session * |
991 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
992 | { | |
993 | struct nfsd4_session *elem; | |
994 | int idx; | |
995 | ||
996 | dump_sessionid(__func__, sessionid); | |
997 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
998 | /* Search in the appropriate list */ |
999 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
1000 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1001 | NFS4_MAX_SESSIONID_LEN)) { | |
1002 | return elem; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | dprintk("%s: session not found\n", __func__); | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
9089f1b4 | 1010 | /* caller must hold client_lock */ |
7116ed6b | 1011 | static void |
5282fd72 | 1012 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
1013 | { |
1014 | list_del(&ses->se_hash); | |
4c649378 | 1015 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1016 | list_del(&ses->se_perclnt); |
4c649378 | 1017 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1018 | } |
1019 | ||
36acb66b | 1020 | /* must be called under the client_lock */ |
1da177e4 | 1021 | static inline void |
36acb66b | 1022 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 1023 | { |
07cd4909 BH |
1024 | if (is_client_expired(clp)) { |
1025 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
1026 | __func__, | |
1027 | clp->cl_clientid.cl_boot, | |
1028 | clp->cl_clientid.cl_id); | |
1029 | return; | |
1030 | } | |
1031 | ||
1da177e4 LT |
1032 | dprintk("renewing client (clientid %08x/%08x)\n", |
1033 | clp->cl_clientid.cl_boot, | |
1034 | clp->cl_clientid.cl_id); | |
1035 | list_move_tail(&clp->cl_lru, &client_lru); | |
1036 | clp->cl_time = get_seconds(); | |
1037 | } | |
1038 | ||
36acb66b BH |
1039 | static inline void |
1040 | renew_client(struct nfs4_client *clp) | |
1041 | { | |
1042 | spin_lock(&client_lock); | |
1043 | renew_client_locked(clp); | |
1044 | spin_unlock(&client_lock); | |
1045 | } | |
1046 | ||
1da177e4 LT |
1047 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1048 | static int | |
1049 | STALE_CLIENTID(clientid_t *clid) | |
1050 | { | |
1051 | if (clid->cl_boot == boot_time) | |
1052 | return 0; | |
60adfc50 AA |
1053 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
1054 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
1055 | return 1; |
1056 | } | |
1057 | ||
1058 | /* | |
1059 | * XXX Should we use a slab cache ? | |
1060 | * This type of memory management is somewhat inefficient, but we use it | |
1061 | * anyway since SETCLIENTID is not a common operation. | |
1062 | */ | |
35bba9a3 | 1063 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1064 | { |
1065 | struct nfs4_client *clp; | |
1066 | ||
35bba9a3 BF |
1067 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
1068 | if (clp == NULL) | |
1069 | return NULL; | |
67114fe6 | 1070 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
35bba9a3 BF |
1071 | if (clp->cl_name.data == NULL) { |
1072 | kfree(clp); | |
1073 | return NULL; | |
1da177e4 | 1074 | } |
35bba9a3 | 1075 | clp->cl_name.len = name.len; |
1da177e4 LT |
1076 | return clp; |
1077 | } | |
1078 | ||
1079 | static inline void | |
1080 | free_client(struct nfs4_client *clp) | |
1081 | { | |
508dc6e1 | 1082 | BUG_ON(!spin_is_locked(&client_lock)); |
792c95dd BF |
1083 | while (!list_empty(&clp->cl_sessions)) { |
1084 | struct nfsd4_session *ses; | |
1085 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
1086 | se_perclnt); | |
1087 | list_del(&ses->se_perclnt); | |
508dc6e1 | 1088 | nfsd4_put_session_locked(ses); |
792c95dd | 1089 | } |
1da177e4 LT |
1090 | if (clp->cl_cred.cr_group_info) |
1091 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 1092 | kfree(clp->cl_principal); |
1da177e4 LT |
1093 | kfree(clp->cl_name.data); |
1094 | kfree(clp); | |
1095 | } | |
1096 | ||
d7682988 BH |
1097 | void |
1098 | release_session_client(struct nfsd4_session *session) | |
1099 | { | |
1100 | struct nfs4_client *clp = session->se_client; | |
1101 | ||
1102 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
1103 | return; | |
1104 | if (is_client_expired(clp)) { | |
1105 | free_client(clp); | |
1106 | session->se_client = NULL; | |
1107 | } else | |
1108 | renew_client_locked(clp); | |
1109 | spin_unlock(&client_lock); | |
d7682988 BH |
1110 | } |
1111 | ||
84d38ac9 BH |
1112 | /* must be called under the client_lock */ |
1113 | static inline void | |
1114 | unhash_client_locked(struct nfs4_client *clp) | |
1115 | { | |
792c95dd BF |
1116 | struct nfsd4_session *ses; |
1117 | ||
07cd4909 | 1118 | mark_client_expired(clp); |
84d38ac9 | 1119 | list_del(&clp->cl_lru); |
4c649378 | 1120 | spin_lock(&clp->cl_lock); |
792c95dd BF |
1121 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
1122 | list_del_init(&ses->se_hash); | |
4c649378 | 1123 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
1124 | } |
1125 | ||
1da177e4 LT |
1126 | static void |
1127 | expire_client(struct nfs4_client *clp) | |
1128 | { | |
fe0750e5 | 1129 | struct nfs4_openowner *oo; |
1da177e4 | 1130 | struct nfs4_delegation *dp; |
1da177e4 LT |
1131 | struct list_head reaplist; |
1132 | ||
1da177e4 LT |
1133 | INIT_LIST_HEAD(&reaplist); |
1134 | spin_lock(&recall_lock); | |
ea1da636 N |
1135 | while (!list_empty(&clp->cl_delegations)) { |
1136 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 1137 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
1138 | list_move(&dp->dl_recall_lru, &reaplist); |
1139 | } | |
1140 | spin_unlock(&recall_lock); | |
1141 | while (!list_empty(&reaplist)) { | |
1142 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
1143 | unhash_delegation(dp); |
1144 | } | |
ea1da636 | 1145 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
1146 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
1147 | release_openowner(oo); | |
1da177e4 | 1148 | } |
6ff8da08 | 1149 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
1150 | if (clp->cl_cb_conn.cb_xprt) |
1151 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
1152 | list_del(&clp->cl_idhash); |
1153 | list_del(&clp->cl_strhash); | |
be1fdf6c | 1154 | spin_lock(&client_lock); |
84d38ac9 | 1155 | unhash_client_locked(clp); |
46583e25 BH |
1156 | if (atomic_read(&clp->cl_refcount) == 0) |
1157 | free_client(clp); | |
be1fdf6c | 1158 | spin_unlock(&client_lock); |
1da177e4 LT |
1159 | } |
1160 | ||
35bba9a3 BF |
1161 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1162 | { | |
1163 | memcpy(target->cl_verifier.data, source->data, | |
1164 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1165 | } |
1166 | ||
35bba9a3 BF |
1167 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1168 | { | |
1da177e4 LT |
1169 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1170 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1171 | } | |
1172 | ||
35bba9a3 BF |
1173 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1174 | { | |
1da177e4 LT |
1175 | target->cr_uid = source->cr_uid; |
1176 | target->cr_gid = source->cr_gid; | |
1177 | target->cr_group_info = source->cr_group_info; | |
1178 | get_group_info(target->cr_group_info); | |
1179 | } | |
1180 | ||
35bba9a3 | 1181 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1182 | { |
a55370a3 | 1183 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1184 | } |
1185 | ||
1186 | static int | |
599e0a22 BF |
1187 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1188 | { | |
1189 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | static int | |
599e0a22 BF |
1193 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1194 | { | |
1195 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | /* XXX what about NGROUP */ | |
1199 | static int | |
599e0a22 BF |
1200 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1201 | { | |
1202 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1203 | } |
1204 | ||
5ec7b46c BF |
1205 | static void gen_clid(struct nfs4_client *clp) |
1206 | { | |
1207 | static u32 current_clientid = 1; | |
1208 | ||
1da177e4 LT |
1209 | clp->cl_clientid.cl_boot = boot_time; |
1210 | clp->cl_clientid.cl_id = current_clientid++; | |
1211 | } | |
1212 | ||
deda2faa BF |
1213 | static void gen_confirm(struct nfs4_client *clp) |
1214 | { | |
ab4684d1 | 1215 | __be32 verf[2]; |
deda2faa | 1216 | static u32 i; |
1da177e4 | 1217 | |
ab4684d1 CL |
1218 | verf[0] = (__be32)get_seconds(); |
1219 | verf[1] = (__be32)i++; | |
1220 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); | |
1da177e4 LT |
1221 | } |
1222 | ||
38c2f4b1 | 1223 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
4581d140 | 1224 | { |
38c2f4b1 | 1225 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
4d71ab87 BF |
1226 | } |
1227 | ||
38c2f4b1 | 1228 | static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
f459e453 BF |
1229 | { |
1230 | struct nfs4_stid *s; | |
4d71ab87 | 1231 | |
38c2f4b1 | 1232 | s = find_stateid(cl, t); |
4d71ab87 BF |
1233 | if (!s) |
1234 | return NULL; | |
f459e453 | 1235 | if (typemask & s->sc_type) |
4581d140 | 1236 | return s; |
4581d140 BF |
1237 | return NULL; |
1238 | } | |
1239 | ||
b09333c4 RL |
1240 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1241 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1242 | { | |
1243 | struct nfs4_client *clp; | |
1244 | struct sockaddr *sa = svc_addr(rqstp); | |
1245 | char *princ; | |
1246 | ||
1247 | clp = alloc_client(name); | |
1248 | if (clp == NULL) | |
1249 | return NULL; | |
1250 | ||
792c95dd BF |
1251 | INIT_LIST_HEAD(&clp->cl_sessions); |
1252 | ||
b09333c4 RL |
1253 | princ = svc_gss_principal(rqstp); |
1254 | if (princ) { | |
1255 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1256 | if (clp->cl_principal == NULL) { | |
508dc6e1 | 1257 | spin_lock(&client_lock); |
b09333c4 | 1258 | free_client(clp); |
508dc6e1 | 1259 | spin_unlock(&client_lock); |
b09333c4 RL |
1260 | return NULL; |
1261 | } | |
1262 | } | |
1263 | ||
38c2f4b1 | 1264 | idr_init(&clp->cl_stateids); |
b09333c4 | 1265 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
46583e25 | 1266 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1267 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1268 | INIT_LIST_HEAD(&clp->cl_idhash); |
1269 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1270 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1271 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1272 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1273 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1274 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1275 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1276 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1277 | clear_bit(0, &clp->cl_cb_slot_busy); |
1278 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1279 | copy_verf(clp, verf); | |
1280 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1281 | clp->cl_flavor = rqstp->rq_flavor; | |
1282 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1283 | gen_confirm(clp); | |
edd76786 | 1284 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1285 | return clp; |
1286 | } | |
1287 | ||
fd39ca9a | 1288 | static void |
1da177e4 LT |
1289 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1290 | { | |
1291 | unsigned int idhashval; | |
1292 | ||
1293 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1294 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1295 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1296 | renew_client(clp); |
1da177e4 LT |
1297 | } |
1298 | ||
fd39ca9a | 1299 | static void |
1da177e4 LT |
1300 | move_to_confirmed(struct nfs4_client *clp) |
1301 | { | |
1302 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1303 | unsigned int strhashval; | |
1304 | ||
1305 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1306 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1307 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1308 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1309 | renew_client(clp); |
1310 | } | |
1311 | ||
1312 | static struct nfs4_client * | |
1313 | find_confirmed_client(clientid_t *clid) | |
1314 | { | |
1315 | struct nfs4_client *clp; | |
1316 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1317 | ||
1318 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
a50d2ad1 BF |
1319 | if (same_clid(&clp->cl_clientid, clid)) { |
1320 | renew_client(clp); | |
1da177e4 | 1321 | return clp; |
a50d2ad1 | 1322 | } |
1da177e4 LT |
1323 | } |
1324 | return NULL; | |
1325 | } | |
1326 | ||
1327 | static struct nfs4_client * | |
1328 | find_unconfirmed_client(clientid_t *clid) | |
1329 | { | |
1330 | struct nfs4_client *clp; | |
1331 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1332 | ||
1333 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1334 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1335 | return clp; |
1336 | } | |
1337 | return NULL; | |
1338 | } | |
1339 | ||
6e5f15c9 | 1340 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1341 | { |
6e5f15c9 | 1342 | return clp->cl_exchange_flags != 0; |
e203d506 | 1343 | } |
a1bcecd2 | 1344 | |
28ce6054 | 1345 | static struct nfs4_client * |
e203d506 | 1346 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1347 | { |
1348 | struct nfs4_client *clp; | |
1349 | ||
1350 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1351 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1352 | return clp; |
1353 | } | |
1354 | return NULL; | |
1355 | } | |
1356 | ||
1357 | static struct nfs4_client * | |
e203d506 | 1358 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1359 | { |
1360 | struct nfs4_client *clp; | |
1361 | ||
1362 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1363 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1364 | return clp; |
1365 | } | |
1366 | return NULL; | |
1367 | } | |
1368 | ||
fd39ca9a | 1369 | static void |
6f3d772f | 1370 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1371 | { |
07263f1e | 1372 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1373 | struct sockaddr *sa = svc_addr(rqstp); |
1374 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1375 | unsigned short expected_family; |
1376 | ||
1377 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1378 | if (se->se_callback_netid_len == 3 && | |
1379 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1380 | expected_family = AF_INET; | |
1381 | else if (se->se_callback_netid_len == 4 && | |
1382 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1383 | expected_family = AF_INET6; | |
1384 | else | |
1da177e4 LT |
1385 | goto out_err; |
1386 | ||
f2ac4dc9 | 1387 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
aa9a4ec7 | 1388 | se->se_callback_addr_len, |
07263f1e BF |
1389 | (struct sockaddr *)&conn->cb_addr, |
1390 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1391 | |
07263f1e | 1392 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1393 | goto out_err; |
aa9a4ec7 | 1394 | |
07263f1e BF |
1395 | if (conn->cb_addr.ss_family == AF_INET6) |
1396 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1397 | |
07263f1e BF |
1398 | conn->cb_prog = se->se_callback_prog; |
1399 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 1400 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
1401 | return; |
1402 | out_err: | |
07263f1e BF |
1403 | conn->cb_addr.ss_family = AF_UNSPEC; |
1404 | conn->cb_addrlen = 0; | |
849823c5 | 1405 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1406 | "will not receive delegations\n", |
1407 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1408 | ||
1da177e4 LT |
1409 | return; |
1410 | } | |
1411 | ||
074fe897 | 1412 | /* |
557ce264 | 1413 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1414 | */ |
074fe897 AA |
1415 | void |
1416 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1417 | { |
557ce264 AA |
1418 | struct nfsd4_slot *slot = resp->cstate.slot; |
1419 | unsigned int base; | |
074fe897 | 1420 | |
557ce264 | 1421 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1422 | |
557ce264 AA |
1423 | slot->sl_opcnt = resp->opcnt; |
1424 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1425 | |
bf5c43c8 | 1426 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
bf864a31 | 1427 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1428 | slot->sl_datalen = 0; |
bf864a31 | 1429 | return; |
074fe897 | 1430 | } |
557ce264 AA |
1431 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1432 | base = (char *)resp->cstate.datap - | |
1433 | (char *)resp->xbuf->head[0].iov_base; | |
1434 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1435 | slot->sl_datalen)) | |
1436 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1437 | return; | |
074fe897 AA |
1438 | } |
1439 | ||
1440 | /* | |
abfabf8c AA |
1441 | * Encode the replay sequence operation from the slot values. |
1442 | * If cachethis is FALSE encode the uncached rep error on the next | |
1443 | * operation which sets resp->p and increments resp->opcnt for | |
1444 | * nfs4svc_encode_compoundres. | |
074fe897 | 1445 | * |
074fe897 | 1446 | */ |
abfabf8c AA |
1447 | static __be32 |
1448 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1449 | struct nfsd4_compoundres *resp) | |
074fe897 | 1450 | { |
abfabf8c AA |
1451 | struct nfsd4_op *op; |
1452 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1453 | |
abfabf8c AA |
1454 | /* Encode the replayed sequence operation */ |
1455 | op = &args->ops[resp->opcnt - 1]; | |
1456 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1457 | |
abfabf8c | 1458 | /* Return nfserr_retry_uncached_rep in next operation. */ |
73e79482 | 1459 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
abfabf8c AA |
1460 | op = &args->ops[resp->opcnt++]; |
1461 | op->status = nfserr_retry_uncached_rep; | |
1462 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1463 | } |
abfabf8c | 1464 | return op->status; |
074fe897 AA |
1465 | } |
1466 | ||
1467 | /* | |
557ce264 AA |
1468 | * The sequence operation is not cached because we can use the slot and |
1469 | * session values. | |
074fe897 AA |
1470 | */ |
1471 | __be32 | |
bf864a31 AA |
1472 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1473 | struct nfsd4_sequence *seq) | |
074fe897 | 1474 | { |
557ce264 | 1475 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1476 | __be32 status; |
1477 | ||
557ce264 | 1478 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1479 | |
abfabf8c AA |
1480 | /* Either returns 0 or nfserr_retry_uncached */ |
1481 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1482 | if (status == nfserr_retry_uncached_rep) | |
1483 | return status; | |
074fe897 | 1484 | |
557ce264 AA |
1485 | /* The sequence operation has been encoded, cstate->datap set. */ |
1486 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1487 | |
557ce264 AA |
1488 | resp->opcnt = slot->sl_opcnt; |
1489 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1490 | status = slot->sl_status; | |
074fe897 AA |
1491 | |
1492 | return status; | |
1493 | } | |
1494 | ||
0733d213 AA |
1495 | /* |
1496 | * Set the exchange_id flags returned by the server. | |
1497 | */ | |
1498 | static void | |
1499 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1500 | { | |
1501 | /* pNFS is not supported */ | |
1502 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1503 | ||
1504 | /* Referrals are supported, Migration is not. */ | |
1505 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1506 | ||
1507 | /* set the wire flags to return to client. */ | |
1508 | clid->flags = new->cl_exchange_flags; | |
1509 | } | |
1510 | ||
069b6ad4 AA |
1511 | __be32 |
1512 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1513 | struct nfsd4_compound_state *cstate, | |
1514 | struct nfsd4_exchange_id *exid) | |
1515 | { | |
0733d213 | 1516 | struct nfs4_client *unconf, *conf, *new; |
57b7b43b | 1517 | __be32 status; |
0733d213 AA |
1518 | unsigned int strhashval; |
1519 | char dname[HEXDIR_LEN]; | |
363168b4 | 1520 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1521 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1522 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1523 | |
363168b4 | 1524 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1525 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1526 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1527 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1528 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 1529 | |
a084daf5 | 1530 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
1531 | return nfserr_inval; |
1532 | ||
1533 | /* Currently only support SP4_NONE */ | |
1534 | switch (exid->spa_how) { | |
1535 | case SP4_NONE: | |
1536 | break; | |
1537 | case SP4_SSV: | |
044bc1d4 | 1538 | return nfserr_serverfault; |
0733d213 AA |
1539 | default: |
1540 | BUG(); /* checked by xdr code */ | |
1541 | case SP4_MACH_CRED: | |
1542 | return nfserr_serverfault; /* no excuse :-/ */ | |
1543 | } | |
1544 | ||
1545 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1546 | ||
1547 | if (status) | |
2786cc3a | 1548 | return status; |
0733d213 AA |
1549 | |
1550 | strhashval = clientstr_hashval(dname); | |
1551 | ||
1552 | nfs4_lock_state(); | |
e203d506 | 1553 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1554 | if (conf) { |
e203d506 BF |
1555 | if (!clp_used_exchangeid(conf)) { |
1556 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1557 | goto out; | |
1558 | } | |
ea236d07 BF |
1559 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
1560 | /* 18.35.4 case 9 */ | |
1561 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) | |
1562 | status = nfserr_perm; | |
1563 | else /* case 3 */ | |
1564 | status = nfserr_clid_inuse; | |
1565 | goto out; | |
1566 | } | |
0733d213 AA |
1567 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1568 | /* 18.35.4 case 8 */ | |
1569 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1570 | status = nfserr_not_same; | |
1571 | goto out; | |
1572 | } | |
1573 | /* Client reboot: destroy old state */ | |
1574 | expire_client(conf); | |
1575 | goto out_new; | |
1576 | } | |
0733d213 AA |
1577 | /* |
1578 | * Set bit when the owner id and verifier map to an already | |
1579 | * confirmed client id (18.35.3). | |
1580 | */ | |
1581 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1582 | ||
1583 | /* | |
1584 | * Falling into 18.35.4 case 2, possible router replay. | |
1585 | * Leave confirmed record intact and return same result. | |
1586 | */ | |
0733d213 AA |
1587 | new = conf; |
1588 | goto out_copy; | |
6ddbbbfe MS |
1589 | } |
1590 | ||
1591 | /* 18.35.4 case 7 */ | |
1592 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1593 | status = nfserr_noent; | |
1594 | goto out; | |
0733d213 AA |
1595 | } |
1596 | ||
e203d506 | 1597 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1598 | if (unconf) { |
1599 | /* | |
1600 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1601 | * a new unconfirmed record should be generated regardless | |
1602 | * of whether any properties have changed. | |
1603 | */ | |
1604 | expire_client(unconf); | |
1605 | } | |
1606 | ||
1607 | out_new: | |
1608 | /* Normal case */ | |
b09333c4 | 1609 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1610 | if (new == NULL) { |
4731030d | 1611 | status = nfserr_jukebox; |
0733d213 AA |
1612 | goto out; |
1613 | } | |
1614 | ||
0733d213 | 1615 | gen_clid(new); |
0733d213 AA |
1616 | add_to_unconfirmed(new, strhashval); |
1617 | out_copy: | |
1618 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1619 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1620 | ||
38eb76a5 | 1621 | exid->seqid = 1; |
0733d213 AA |
1622 | nfsd4_set_ex_flags(new, exid); |
1623 | ||
1624 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1625 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1626 | status = nfs_ok; |
1627 | ||
1628 | out: | |
1629 | nfs4_unlock_state(); | |
0733d213 | 1630 | return status; |
069b6ad4 AA |
1631 | } |
1632 | ||
57b7b43b | 1633 | static __be32 |
88e588d5 | 1634 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1635 | { |
88e588d5 AA |
1636 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1637 | slot_seqid); | |
b85d4c01 BH |
1638 | |
1639 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1640 | if (slot_inuse) { |
1641 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1642 | return nfserr_jukebox; |
1643 | else | |
1644 | return nfserr_seq_misordered; | |
1645 | } | |
f6d82485 | 1646 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 1647 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 1648 | return nfs_ok; |
88e588d5 | 1649 | if (seqid == slot_seqid) |
b85d4c01 | 1650 | return nfserr_replay_cache; |
b85d4c01 BH |
1651 | return nfserr_seq_misordered; |
1652 | } | |
1653 | ||
49557cc7 AA |
1654 | /* |
1655 | * Cache the create session result into the create session single DRC | |
1656 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1657 | * Do this for solo or embedded create session operations. | |
1658 | */ | |
1659 | static void | |
1660 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 1661 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
1662 | { |
1663 | slot->sl_status = nfserr; | |
1664 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1665 | } | |
1666 | ||
1667 | static __be32 | |
1668 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1669 | struct nfsd4_clid_slot *slot) | |
1670 | { | |
1671 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1672 | return slot->sl_status; | |
1673 | } | |
1674 | ||
1b74c25b MJ |
1675 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1676 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1677 | 1 + /* MIN tag is length with zero, only length */ \ | |
1678 | 3 + /* version, opcount, opcode */ \ | |
1679 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1680 | /* seqid, slotID, slotID, cache */ \ | |
1681 | 4 ) * sizeof(__be32)) | |
1682 | ||
1683 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1684 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1685 | 1 + /* status */ \ | |
1686 | 1 + /* MIN tag is length with zero, only length */ \ | |
1687 | 3 + /* opcount, opcode, opstatus*/ \ | |
1688 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1689 | /* seqid, slotID, slotID, slotID, status */ \ | |
1690 | 5 ) * sizeof(__be32)) | |
1691 | ||
57b7b43b | 1692 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
1b74c25b MJ |
1693 | { |
1694 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1695 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1696 | } | |
1697 | ||
069b6ad4 AA |
1698 | __be32 |
1699 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1700 | struct nfsd4_compound_state *cstate, | |
1701 | struct nfsd4_create_session *cr_ses) | |
1702 | { | |
363168b4 | 1703 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1704 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1705 | struct nfsd4_session *new; |
49557cc7 | 1706 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1707 | bool confirm_me = false; |
57b7b43b | 1708 | __be32 status = 0; |
ec6b5d7b | 1709 | |
a62573dc MJ |
1710 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1711 | return nfserr_inval; | |
1712 | ||
ec6b5d7b AA |
1713 | nfs4_lock_state(); |
1714 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1715 | conf = find_confirmed_client(&cr_ses->clientid); | |
1716 | ||
1717 | if (conf) { | |
49557cc7 AA |
1718 | cs_slot = &conf->cl_cs_slot; |
1719 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1720 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1721 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1722 | cs_slot->sl_seqid); |
38eb76a5 | 1723 | /* Return the cached reply status */ |
49557cc7 | 1724 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1725 | goto out; |
49557cc7 | 1726 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1727 | status = nfserr_seq_misordered; |
1728 | dprintk("Sequence misordered!\n"); | |
1729 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1730 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1731 | goto out; |
1732 | } | |
ec6b5d7b AA |
1733 | } else if (unconf) { |
1734 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1735 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1736 | status = nfserr_clid_inuse; |
1737 | goto out; | |
1738 | } | |
1739 | ||
49557cc7 AA |
1740 | cs_slot = &unconf->cl_cs_slot; |
1741 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1742 | if (status) { |
1743 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1744 | status = nfserr_seq_misordered; |
cd5b8144 | 1745 | goto out; |
ec6b5d7b AA |
1746 | } |
1747 | ||
86c3e16c | 1748 | confirm_me = true; |
ec6b5d7b AA |
1749 | conf = unconf; |
1750 | } else { | |
1751 | status = nfserr_stale_clientid; | |
1752 | goto out; | |
1753 | } | |
1754 | ||
8323c3b2 BF |
1755 | /* |
1756 | * XXX: we should probably set this at creation time, and check | |
1757 | * for consistent minorversion use throughout: | |
1758 | */ | |
1759 | conf->cl_minorversion = 1; | |
408b79bc BF |
1760 | /* |
1761 | * We do not support RDMA or persistent sessions | |
1762 | */ | |
1763 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1764 | cr_ses->flags &= ~SESSION4_RDMA; | |
1765 | ||
1b74c25b MJ |
1766 | status = nfserr_toosmall; |
1767 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1768 | goto out; | |
1769 | ||
ac7c46f2 BF |
1770 | status = nfserr_jukebox; |
1771 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1772 | if (!new) | |
ec6b5d7b | 1773 | goto out; |
ac7c46f2 BF |
1774 | status = nfs_ok; |
1775 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1776 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1777 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1778 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1779 | cs_slot->sl_seqid++; |
49557cc7 | 1780 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1781 | |
49557cc7 AA |
1782 | /* cache solo and embedded create sessions under the state lock */ |
1783 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1784 | if (confirm_me) |
1785 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1786 | out: |
1787 | nfs4_unlock_state(); | |
1788 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1789 | return status; | |
069b6ad4 AA |
1790 | } |
1791 | ||
57716355 BF |
1792 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1793 | { | |
1794 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1795 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1796 | ||
1797 | return argp->opcnt == resp->opcnt; | |
1798 | } | |
1799 | ||
1d1bc8f2 BF |
1800 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1801 | { | |
1802 | switch (*dir) { | |
1803 | case NFS4_CDFC4_FORE: | |
1804 | case NFS4_CDFC4_BACK: | |
1805 | return nfs_ok; | |
1806 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1807 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1808 | *dir = NFS4_CDFC4_BOTH; | |
1809 | return nfs_ok; | |
1810 | }; | |
1811 | return nfserr_inval; | |
1812 | } | |
1813 | ||
1814 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1815 | struct nfsd4_compound_state *cstate, | |
1816 | struct nfsd4_bind_conn_to_session *bcts) | |
1817 | { | |
1818 | __be32 status; | |
1819 | ||
1820 | if (!nfsd4_last_compound_op(rqstp)) | |
1821 | return nfserr_not_only_op; | |
1822 | spin_lock(&client_lock); | |
1823 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1824 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1825 | * client_lock iself: */ | |
1826 | if (cstate->session) { | |
1827 | nfsd4_get_session(cstate->session); | |
1828 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1829 | } | |
1830 | spin_unlock(&client_lock); | |
1831 | if (!cstate->session) | |
1832 | return nfserr_badsession; | |
1833 | ||
1834 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1835 | if (!status) |
1836 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1837 | return status; | |
1d1bc8f2 BF |
1838 | } |
1839 | ||
5d4cec2f BF |
1840 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1841 | { | |
1842 | if (!session) | |
1843 | return 0; | |
1844 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1845 | } | |
1846 | ||
069b6ad4 AA |
1847 | __be32 |
1848 | nfsd4_destroy_session(struct svc_rqst *r, | |
1849 | struct nfsd4_compound_state *cstate, | |
1850 | struct nfsd4_destroy_session *sessionid) | |
1851 | { | |
e10e0cfc | 1852 | struct nfsd4_session *ses; |
57b7b43b | 1853 | __be32 status = nfserr_badsession; |
e10e0cfc BH |
1854 | |
1855 | /* Notes: | |
1856 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1857 | * - Should we return nfserr_back_chan_busy if waiting for | |
1858 | * callbacks on to-be-destroyed session? | |
1859 | * - Do we need to clear any callback info from previous session? | |
1860 | */ | |
1861 | ||
5d4cec2f | 1862 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1863 | if (!nfsd4_last_compound_op(r)) |
1864 | return nfserr_not_only_op; | |
1865 | } | |
e10e0cfc | 1866 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1867 | spin_lock(&client_lock); |
e10e0cfc BH |
1868 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1869 | if (!ses) { | |
9089f1b4 | 1870 | spin_unlock(&client_lock); |
e10e0cfc BH |
1871 | goto out; |
1872 | } | |
1873 | ||
1874 | unhash_session(ses); | |
9089f1b4 | 1875 | spin_unlock(&client_lock); |
e10e0cfc | 1876 | |
ab707e15 | 1877 | nfs4_lock_state(); |
84f5f7cc | 1878 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1879 | nfs4_unlock_state(); |
19cf5c02 | 1880 | |
508dc6e1 | 1881 | spin_lock(&client_lock); |
19cf5c02 | 1882 | nfsd4_del_conns(ses); |
508dc6e1 BH |
1883 | nfsd4_put_session_locked(ses); |
1884 | spin_unlock(&client_lock); | |
e10e0cfc BH |
1885 | status = nfs_ok; |
1886 | out: | |
1887 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1888 | return status; | |
069b6ad4 AA |
1889 | } |
1890 | ||
a663bdd8 | 1891 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1892 | { |
1893 | struct nfsd4_conn *c; | |
1894 | ||
1895 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1896 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1897 | return c; |
1898 | } | |
1899 | } | |
1900 | return NULL; | |
1901 | } | |
1902 | ||
a663bdd8 | 1903 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1904 | { |
1905 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1906 | struct nfsd4_conn *c; |
21b75b01 | 1907 | int ret; |
328ead28 BF |
1908 | |
1909 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1910 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1911 | if (c) { |
1912 | spin_unlock(&clp->cl_lock); | |
1913 | free_conn(new); | |
1914 | return; | |
1915 | } | |
1916 | __nfsd4_hash_conn(new, ses); | |
1917 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1918 | ret = nfsd4_register_conn(new); |
1919 | if (ret) | |
1920 | /* oops; xprt is already down: */ | |
1921 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1922 | return; |
1923 | } | |
1924 | ||
868b89c3 MJ |
1925 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1926 | { | |
1927 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1928 | ||
1929 | return args->opcnt > session->se_fchannel.maxops; | |
1930 | } | |
1931 | ||
ae82a8d0 MJ |
1932 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1933 | struct nfsd4_session *session) | |
1934 | { | |
1935 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1936 | ||
1937 | return xb->len > session->se_fchannel.maxreq_sz; | |
1938 | } | |
1939 | ||
069b6ad4 | 1940 | __be32 |
b85d4c01 | 1941 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1942 | struct nfsd4_compound_state *cstate, |
1943 | struct nfsd4_sequence *seq) | |
1944 | { | |
f9bb94c4 | 1945 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1946 | struct nfsd4_session *session; |
1947 | struct nfsd4_slot *slot; | |
a663bdd8 | 1948 | struct nfsd4_conn *conn; |
57b7b43b | 1949 | __be32 status; |
b85d4c01 | 1950 | |
f9bb94c4 AA |
1951 | if (resp->opcnt != 1) |
1952 | return nfserr_sequence_pos; | |
1953 | ||
a663bdd8 BF |
1954 | /* |
1955 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1956 | * below. | |
1957 | */ | |
1958 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1959 | if (!conn) | |
1960 | return nfserr_jukebox; | |
1961 | ||
9089f1b4 | 1962 | spin_lock(&client_lock); |
b85d4c01 BH |
1963 | status = nfserr_badsession; |
1964 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1965 | if (!session) | |
1966 | goto out; | |
1967 | ||
868b89c3 MJ |
1968 | status = nfserr_too_many_ops; |
1969 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1970 | goto out; | |
1971 | ||
ae82a8d0 MJ |
1972 | status = nfserr_req_too_big; |
1973 | if (nfsd4_request_too_big(rqstp, session)) | |
1974 | goto out; | |
1975 | ||
b85d4c01 | 1976 | status = nfserr_badslot; |
6c18ba9f | 1977 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1978 | goto out; |
1979 | ||
557ce264 | 1980 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1981 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1982 | ||
a8dfdaeb AA |
1983 | /* We do not negotiate the number of slots yet, so set the |
1984 | * maxslots to the session maxreqs which is used to encode | |
1985 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1986 | seq->maxslots = session->se_fchannel.maxreqs; | |
1987 | ||
73e79482 BF |
1988 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
1989 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 1990 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
1991 | status = nfserr_seq_misordered; |
1992 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
1993 | goto out; | |
b85d4c01 BH |
1994 | cstate->slot = slot; |
1995 | cstate->session = session; | |
da3846a2 | 1996 | /* Return the cached reply status and set cstate->status |
557ce264 | 1997 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1998 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1999 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 2000 | goto out; |
b85d4c01 BH |
2001 | } |
2002 | if (status) | |
2003 | goto out; | |
2004 | ||
a663bdd8 BF |
2005 | nfsd4_sequence_check_conn(conn, session); |
2006 | conn = NULL; | |
328ead28 | 2007 | |
b85d4c01 | 2008 | /* Success! bump slot seqid */ |
b85d4c01 | 2009 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 2010 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
2011 | if (seq->cachethis) |
2012 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
2013 | else |
2014 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
2015 | |
2016 | cstate->slot = slot; | |
2017 | cstate->session = session; | |
2018 | ||
b85d4c01 | 2019 | out: |
26c0c75e | 2020 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 2021 | if (cstate->session) { |
0d7bb719 BF |
2022 | struct nfs4_client *clp = session->se_client; |
2023 | ||
36acb66b | 2024 | nfsd4_get_session(cstate->session); |
0d7bb719 | 2025 | atomic_inc(&clp->cl_refcount); |
5423732a BH |
2026 | switch (clp->cl_cb_state) { |
2027 | case NFSD4_CB_DOWN: | |
fc0c3dd1 | 2028 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
5423732a BH |
2029 | break; |
2030 | case NFSD4_CB_FAULT: | |
fc0c3dd1 | 2031 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
5423732a | 2032 | break; |
fc0c3dd1 BH |
2033 | default: |
2034 | seq->status_flags = 0; | |
5423732a | 2035 | } |
aaf84eb9 | 2036 | } |
a663bdd8 | 2037 | kfree(conn); |
36acb66b | 2038 | spin_unlock(&client_lock); |
b85d4c01 BH |
2039 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
2040 | return status; | |
069b6ad4 AA |
2041 | } |
2042 | ||
345c2842 MJ |
2043 | static inline bool has_resources(struct nfs4_client *clp) |
2044 | { | |
2045 | return !list_empty(&clp->cl_openowners) | |
2046 | || !list_empty(&clp->cl_delegations) | |
2047 | || !list_empty(&clp->cl_sessions); | |
2048 | } | |
2049 | ||
2050 | __be32 | |
2051 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) | |
2052 | { | |
2053 | struct nfs4_client *conf, *unconf, *clp; | |
57b7b43b | 2054 | __be32 status = 0; |
345c2842 MJ |
2055 | |
2056 | nfs4_lock_state(); | |
2057 | unconf = find_unconfirmed_client(&dc->clientid); | |
2058 | conf = find_confirmed_client(&dc->clientid); | |
2059 | ||
2060 | if (conf) { | |
2061 | clp = conf; | |
2062 | ||
2063 | if (!is_client_expired(conf) && has_resources(conf)) { | |
2064 | status = nfserr_clientid_busy; | |
2065 | goto out; | |
2066 | } | |
2067 | ||
2068 | /* rfc5661 18.50.3 */ | |
2069 | if (cstate->session && conf == cstate->session->se_client) { | |
2070 | status = nfserr_clientid_busy; | |
2071 | goto out; | |
2072 | } | |
2073 | } else if (unconf) | |
2074 | clp = unconf; | |
2075 | else { | |
2076 | status = nfserr_stale_clientid; | |
2077 | goto out; | |
2078 | } | |
2079 | ||
2080 | expire_client(clp); | |
2081 | out: | |
2082 | nfs4_unlock_state(); | |
2083 | dprintk("%s return %d\n", __func__, ntohl(status)); | |
2084 | return status; | |
2085 | } | |
2086 | ||
4dc6ec00 BF |
2087 | __be32 |
2088 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
2089 | { | |
57b7b43b | 2090 | __be32 status = 0; |
bcecf1cc | 2091 | |
4dc6ec00 BF |
2092 | if (rc->rca_one_fs) { |
2093 | if (!cstate->current_fh.fh_dentry) | |
2094 | return nfserr_nofilehandle; | |
2095 | /* | |
2096 | * We don't take advantage of the rca_one_fs case. | |
2097 | * That's OK, it's optional, we can safely ignore it. | |
2098 | */ | |
2099 | return nfs_ok; | |
2100 | } | |
bcecf1cc | 2101 | |
4dc6ec00 | 2102 | nfs4_lock_state(); |
bcecf1cc | 2103 | status = nfserr_complete_already; |
a52d726b JL |
2104 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
2105 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
2106 | goto out; |
2107 | ||
2108 | status = nfserr_stale_clientid; | |
2109 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
2110 | /* |
2111 | * The following error isn't really legal. | |
2112 | * But we only get here if the client just explicitly | |
2113 | * destroyed the client. Surely it no longer cares what | |
2114 | * error it gets back on an operation for the dead | |
2115 | * client. | |
2116 | */ | |
bcecf1cc MJ |
2117 | goto out; |
2118 | ||
2119 | status = nfs_ok; | |
2a4317c5 | 2120 | nfsd4_client_record_create(cstate->session->se_client); |
bcecf1cc | 2121 | out: |
4dc6ec00 | 2122 | nfs4_unlock_state(); |
bcecf1cc | 2123 | return status; |
4dc6ec00 BF |
2124 | } |
2125 | ||
b37ad28b | 2126 | __be32 |
b591480b BF |
2127 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2128 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 2129 | { |
a084daf5 | 2130 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 LT |
2131 | nfs4_verifier clverifier = setclid->se_verf; |
2132 | unsigned int strhashval; | |
28ce6054 | 2133 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 2134 | __be32 status; |
a55370a3 | 2135 | char dname[HEXDIR_LEN]; |
1da177e4 | 2136 | |
a55370a3 N |
2137 | status = nfs4_make_rec_clidname(dname, &clname); |
2138 | if (status) | |
73aea4ec | 2139 | return status; |
a55370a3 | 2140 | |
1da177e4 LT |
2141 | /* |
2142 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2143 | * We get here on a DRC miss. | |
2144 | */ | |
2145 | ||
a55370a3 | 2146 | strhashval = clientstr_hashval(dname); |
1da177e4 | 2147 | |
1da177e4 | 2148 | nfs4_lock_state(); |
e203d506 | 2149 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 2150 | if (conf) { |
a186e767 | 2151 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 2152 | status = nfserr_clid_inuse; |
e203d506 BF |
2153 | if (clp_used_exchangeid(conf)) |
2154 | goto out; | |
026722c2 | 2155 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
2156 | char addr_str[INET6_ADDRSTRLEN]; |
2157 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
2158 | sizeof(addr_str)); | |
2159 | dprintk("NFSD: setclientid: string in use by client " | |
2160 | "at %s\n", addr_str); | |
1da177e4 LT |
2161 | goto out; |
2162 | } | |
1da177e4 | 2163 | } |
a186e767 BF |
2164 | /* |
2165 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
2166 | * has a description of SETCLIENTID request processing consisting | |
2167 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
2168 | */ | |
e203d506 | 2169 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 2170 | status = nfserr_jukebox; |
1da177e4 | 2171 | if (!conf) { |
a186e767 BF |
2172 | /* |
2173 | * RFC 3530 14.2.33 CASE 4: | |
2174 | * placed first, because it is the normal case | |
1da177e4 LT |
2175 | */ |
2176 | if (unconf) | |
2177 | expire_client(unconf); | |
b09333c4 | 2178 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2179 | if (new == NULL) |
1da177e4 | 2180 | goto out; |
1da177e4 | 2181 | gen_clid(new); |
599e0a22 | 2182 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 2183 | /* |
a186e767 BF |
2184 | * RFC 3530 14.2.33 CASE 1: |
2185 | * probable callback update | |
1da177e4 | 2186 | */ |
31f4a6c1 N |
2187 | if (unconf) { |
2188 | /* Note this is removing unconfirmed {*x***}, | |
2189 | * which is stronger than RFC recommended {vxc**}. | |
2190 | * This has the advantage that there is at most | |
2191 | * one {*x***} in either list at any time. | |
2192 | */ | |
2193 | expire_client(unconf); | |
1da177e4 | 2194 | } |
b09333c4 | 2195 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2196 | if (new == NULL) |
1da177e4 | 2197 | goto out; |
1da177e4 | 2198 | copy_clid(new, conf); |
1da177e4 LT |
2199 | } else if (!unconf) { |
2200 | /* | |
a186e767 BF |
2201 | * RFC 3530 14.2.33 CASE 2: |
2202 | * probable client reboot; state will be removed if | |
2203 | * confirmed. | |
1da177e4 | 2204 | */ |
b09333c4 | 2205 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2206 | if (new == NULL) |
1da177e4 | 2207 | goto out; |
1da177e4 | 2208 | gen_clid(new); |
49ba8781 | 2209 | } else { |
a186e767 BF |
2210 | /* |
2211 | * RFC 3530 14.2.33 CASE 3: | |
2212 | * probable client reboot; state will be removed if | |
2213 | * confirmed. | |
1da177e4 LT |
2214 | */ |
2215 | expire_client(unconf); | |
b09333c4 | 2216 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2217 | if (new == NULL) |
1da177e4 | 2218 | goto out; |
1da177e4 | 2219 | gen_clid(new); |
1da177e4 | 2220 | } |
8323c3b2 BF |
2221 | /* |
2222 | * XXX: we should probably set this at creation time, and check | |
2223 | * for consistent minorversion use throughout: | |
2224 | */ | |
2225 | new->cl_minorversion = 0; | |
6f3d772f | 2226 | gen_callback(new, setclid, rqstp); |
c175b83c | 2227 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2228 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2229 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2230 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2231 | status = nfs_ok; | |
2232 | out: | |
2233 | nfs4_unlock_state(); | |
2234 | return status; | |
2235 | } | |
2236 | ||
2237 | ||
2238 | /* | |
a186e767 BF |
2239 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2240 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2241 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2242 | */ |
b37ad28b | 2243 | __be32 |
b591480b BF |
2244 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2245 | struct nfsd4_compound_state *cstate, | |
2246 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2247 | { |
21ab45a4 | 2248 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2249 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2250 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2251 | __be32 status; |
1da177e4 LT |
2252 | |
2253 | if (STALE_CLIENTID(clid)) | |
2254 | return nfserr_stale_clientid; | |
2255 | /* | |
2256 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2257 | * We get here on a DRC miss. | |
2258 | */ | |
2259 | ||
2260 | nfs4_lock_state(); | |
21ab45a4 N |
2261 | |
2262 | conf = find_confirmed_client(clid); | |
2263 | unconf = find_unconfirmed_client(clid); | |
2264 | ||
a186e767 BF |
2265 | /* |
2266 | * section 14.2.34 of RFC 3530 has a description of | |
2267 | * SETCLIENTID_CONFIRM request processing consisting | |
2268 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2269 | */ | |
f07ea10d | 2270 | status = nfserr_clid_inuse; |
366e0c1d | 2271 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2272 | /* |
2273 | * RFC 3530 14.2.34 CASE 1: | |
2274 | * callback update | |
2275 | */ | |
599e0a22 | 2276 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2277 | status = nfserr_clid_inuse; |
2278 | else { | |
5a3c9d71 BF |
2279 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2280 | nfsd4_probe_callback(conf); | |
1a69c179 | 2281 | expire_client(unconf); |
1da177e4 LT |
2282 | status = nfs_ok; |
2283 | } | |
f3aba4e5 | 2284 | } else if (conf && !unconf) { |
a186e767 BF |
2285 | /* |
2286 | * RFC 3530 14.2.34 CASE 2: | |
2287 | * probable retransmitted request; play it safe and | |
2288 | * do nothing. | |
7c79f737 | 2289 | */ |
599e0a22 | 2290 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2291 | status = nfserr_clid_inuse; |
21ab45a4 | 2292 | else |
1da177e4 | 2293 | status = nfs_ok; |
7c79f737 | 2294 | } else if (!conf && unconf |
599e0a22 | 2295 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2296 | /* |
2297 | * RFC 3530 14.2.34 CASE 3: | |
2298 | * Normal case; new or rebooted client: | |
7c79f737 | 2299 | */ |
599e0a22 | 2300 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2301 | status = nfserr_clid_inuse; |
2302 | } else { | |
1a69c179 N |
2303 | unsigned int hash = |
2304 | clientstr_hashval(unconf->cl_recdir); | |
2305 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2306 | hash); |
1a69c179 | 2307 | if (conf) { |
2a4317c5 | 2308 | nfsd4_client_record_remove(conf); |
1a69c179 N |
2309 | expire_client(conf); |
2310 | } | |
1da177e4 | 2311 | move_to_confirmed(unconf); |
21ab45a4 | 2312 | conf = unconf; |
5a3c9d71 | 2313 | nfsd4_probe_callback(conf); |
1a69c179 | 2314 | status = nfs_ok; |
1da177e4 | 2315 | } |
599e0a22 BF |
2316 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2317 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2318 | &confirm)))) { |
a186e767 BF |
2319 | /* |
2320 | * RFC 3530 14.2.34 CASE 4: | |
2321 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2322 | */ |
1da177e4 | 2323 | status = nfserr_stale_clientid; |
08e8987c | 2324 | } |
f07ea10d | 2325 | |
1da177e4 LT |
2326 | nfs4_unlock_state(); |
2327 | return status; | |
2328 | } | |
2329 | ||
32513b40 BF |
2330 | static struct nfs4_file *nfsd4_alloc_file(void) |
2331 | { | |
2332 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
2333 | } | |
2334 | ||
1da177e4 | 2335 | /* OPEN Share state helper functions */ |
32513b40 | 2336 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
1da177e4 | 2337 | { |
1da177e4 LT |
2338 | unsigned int hashval = file_hashval(ino); |
2339 | ||
32513b40 BF |
2340 | atomic_set(&fp->fi_ref, 1); |
2341 | INIT_LIST_HEAD(&fp->fi_hash); | |
2342 | INIT_LIST_HEAD(&fp->fi_stateids); | |
2343 | INIT_LIST_HEAD(&fp->fi_delegations); | |
2344 | fp->fi_inode = igrab(ino); | |
2345 | fp->fi_had_conflict = false; | |
2346 | fp->fi_lease = NULL; | |
2347 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); | |
2348 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
2349 | spin_lock(&recall_lock); | |
2350 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2351 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2352 | } |
2353 | ||
e60d4398 | 2354 | static void |
e18b890b | 2355 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2356 | { |
e60d4398 N |
2357 | if (*slab == NULL) |
2358 | return; | |
1a1d92c1 | 2359 | kmem_cache_destroy(*slab); |
e60d4398 | 2360 | *slab = NULL; |
1da177e4 LT |
2361 | } |
2362 | ||
e8ff2a84 | 2363 | void |
1da177e4 LT |
2364 | nfsd4_free_slabs(void) |
2365 | { | |
fe0750e5 BF |
2366 | nfsd4_free_slab(&openowner_slab); |
2367 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2368 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2369 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2370 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2371 | } |
1da177e4 | 2372 | |
72083396 | 2373 | int |
e60d4398 N |
2374 | nfsd4_init_slabs(void) |
2375 | { | |
fe0750e5 BF |
2376 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2377 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2378 | if (openowner_slab == NULL) | |
2379 | goto out_nomem; | |
2380 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2381 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2382 | if (lockowner_slab == NULL) | |
e60d4398 N |
2383 | goto out_nomem; |
2384 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2385 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2386 | if (file_slab == NULL) |
2387 | goto out_nomem; | |
5ac049ac | 2388 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 2389 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac N |
2390 | if (stateid_slab == NULL) |
2391 | goto out_nomem; | |
5b2d21c1 | 2392 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2393 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2394 | if (deleg_slab == NULL) |
2395 | goto out_nomem; | |
e60d4398 N |
2396 | return 0; |
2397 | out_nomem: | |
2398 | nfsd4_free_slabs(); | |
2399 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2400 | return -ENOMEM; | |
1da177e4 LT |
2401 | } |
2402 | ||
fe0750e5 BF |
2403 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2404 | { | |
2405 | kfree(oo->oo_owner.so_owner.data); | |
2406 | kmem_cache_free(openowner_slab, oo); | |
2407 | } | |
2408 | ||
2409 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2410 | { |
fe0750e5 BF |
2411 | kfree(lo->lo_owner.so_owner.data); |
2412 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2413 | } |
2414 | ||
ff194bd9 | 2415 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2416 | { |
ff194bd9 BF |
2417 | rp->rp_status = nfserr_serverfault; |
2418 | rp->rp_buflen = 0; | |
2419 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2420 | } |
2421 | ||
fe0750e5 | 2422 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2423 | { |
1da177e4 | 2424 | struct nfs4_stateowner *sop; |
1da177e4 | 2425 | |
fe0750e5 | 2426 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2427 | if (!sop) |
2428 | return NULL; | |
2429 | ||
2430 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2431 | if (!sop->so_owner.data) { | |
fe0750e5 | 2432 | kmem_cache_free(slab, sop); |
1da177e4 | 2433 | return NULL; |
ff194bd9 BF |
2434 | } |
2435 | sop->so_owner.len = owner->len; | |
2436 | ||
ea1da636 | 2437 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
2438 | sop->so_client = clp; |
2439 | init_nfs4_replay(&sop->so_replay); | |
2440 | return sop; | |
2441 | } | |
2442 | ||
fe0750e5 | 2443 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 2444 | { |
16bfdaaf | 2445 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
fe0750e5 | 2446 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
2447 | } |
2448 | ||
fe0750e5 | 2449 | static struct nfs4_openowner * |
ff194bd9 | 2450 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2451 | struct nfs4_openowner *oo; |
ff194bd9 | 2452 | |
fe0750e5 BF |
2453 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2454 | if (!oo) | |
ff194bd9 | 2455 | return NULL; |
fe0750e5 BF |
2456 | oo->oo_owner.so_is_open_owner = 1; |
2457 | oo->oo_owner.so_seqid = open->op_seqid; | |
d29b20cd | 2458 | oo->oo_flags = NFS4_OO_NEW; |
fe0750e5 | 2459 | oo->oo_time = 0; |
38c387b5 | 2460 | oo->oo_last_closed_stid = NULL; |
fe0750e5 BF |
2461 | INIT_LIST_HEAD(&oo->oo_close_lru); |
2462 | hash_openowner(oo, clp, strhashval); | |
2463 | return oo; | |
1da177e4 LT |
2464 | } |
2465 | ||
996e0938 | 2466 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
fe0750e5 | 2467 | struct nfs4_openowner *oo = open->op_openowner; |
d3b313a4 | 2468 | struct nfs4_client *clp = oo->oo_owner.so_client; |
1da177e4 | 2469 | |
996e0938 | 2470 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
ea1da636 | 2471 | INIT_LIST_HEAD(&stp->st_lockowners); |
fe0750e5 | 2472 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2473 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 | 2474 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2475 | get_nfs4_file(fp); |
1da177e4 | 2476 | stp->st_file = fp; |
1da177e4 LT |
2477 | stp->st_access_bmap = 0; |
2478 | stp->st_deny_bmap = 0; | |
82c5ff1b | 2479 | set_access(open->op_share_access, stp); |
ce0fc43c | 2480 | set_deny(open->op_share_deny, stp); |
4c4cd222 | 2481 | stp->st_openstp = NULL; |
1da177e4 LT |
2482 | } |
2483 | ||
fd39ca9a | 2484 | static void |
fe0750e5 | 2485 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2486 | { |
fe0750e5 | 2487 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2488 | |
fe0750e5 BF |
2489 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2490 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2491 | } |
2492 | ||
1da177e4 | 2493 | static int |
599e0a22 BF |
2494 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2495 | clientid_t *clid) | |
2496 | { | |
2497 | return (sop->so_owner.len == owner->len) && | |
2498 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2499 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2500 | } |
2501 | ||
fe0750e5 | 2502 | static struct nfs4_openowner * |
1da177e4 LT |
2503 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2504 | { | |
a50d2ad1 BF |
2505 | struct nfs4_stateowner *so; |
2506 | struct nfs4_openowner *oo; | |
1da177e4 | 2507 | |
16bfdaaf BF |
2508 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
2509 | if (!so->so_is_open_owner) | |
2510 | continue; | |
a50d2ad1 BF |
2511 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
2512 | oo = openowner(so); | |
2513 | renew_client(oo->oo_owner.so_client); | |
2514 | return oo; | |
2515 | } | |
1da177e4 LT |
2516 | } |
2517 | return NULL; | |
2518 | } | |
2519 | ||
2520 | /* search file_hashtbl[] for file */ | |
2521 | static struct nfs4_file * | |
2522 | find_file(struct inode *ino) | |
2523 | { | |
2524 | unsigned int hashval = file_hashval(ino); | |
2525 | struct nfs4_file *fp; | |
2526 | ||
8b671b80 | 2527 | spin_lock(&recall_lock); |
1da177e4 | 2528 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2529 | if (fp->fi_inode == ino) { |
2530 | get_nfs4_file(fp); | |
8b671b80 | 2531 | spin_unlock(&recall_lock); |
1da177e4 | 2532 | return fp; |
13cd2184 | 2533 | } |
1da177e4 | 2534 | } |
8b671b80 | 2535 | spin_unlock(&recall_lock); |
1da177e4 LT |
2536 | return NULL; |
2537 | } | |
2538 | ||
1da177e4 LT |
2539 | /* |
2540 | * Called to check deny when READ with all zero stateid or | |
2541 | * WRITE with all zero or all one stateid | |
2542 | */ | |
b37ad28b | 2543 | static __be32 |
1da177e4 LT |
2544 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2545 | { | |
2546 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2547 | struct nfs4_file *fp; | |
dcef0413 | 2548 | struct nfs4_ol_stateid *stp; |
b37ad28b | 2549 | __be32 ret; |
1da177e4 LT |
2550 | |
2551 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2552 | ||
2553 | fp = find_file(ino); | |
13cd2184 N |
2554 | if (!fp) |
2555 | return nfs_ok; | |
b700949b | 2556 | ret = nfserr_locked; |
1da177e4 | 2557 | /* Search for conflicting share reservations */ |
13cd2184 | 2558 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
ce0fc43c JL |
2559 | if (test_deny(deny_type, stp) || |
2560 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) | |
13cd2184 | 2561 | goto out; |
1da177e4 | 2562 | } |
13cd2184 N |
2563 | ret = nfs_ok; |
2564 | out: | |
2565 | put_nfs4_file(fp); | |
2566 | return ret; | |
1da177e4 LT |
2567 | } |
2568 | ||
6b57d9c8 | 2569 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2570 | { |
1da177e4 LT |
2571 | /* We're assuming the state code never drops its reference |
2572 | * without first removing the lease. Since we're in this lease | |
2573 | * callback (and since the lease code is serialized by the kernel | |
2574 | * lock) we know the server hasn't removed the lease yet, we know | |
2575 | * it's safe to take a reference: */ | |
2576 | atomic_inc(&dp->dl_count); | |
2577 | ||
1da177e4 | 2578 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2579 | |
460781b5 | 2580 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2581 | dp->dl_time = get_seconds(); |
2582 | ||
6b57d9c8 BF |
2583 | nfsd4_cb_recall(dp); |
2584 | } | |
2585 | ||
acfdf5c3 | 2586 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2587 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2588 | { | |
acfdf5c3 BF |
2589 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2590 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2591 | |
acfdf5c3 BF |
2592 | BUG_ON(!fp); |
2593 | /* We assume break_lease is only called once per lease: */ | |
2594 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2595 | /* |
2596 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2597 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2598 | * in time: |
0272e1fd BF |
2599 | */ |
2600 | fl->fl_break_time = 0; | |
1da177e4 | 2601 | |
5d926e8c | 2602 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2603 | fp->fi_had_conflict = true; |
2604 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2605 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2606 | spin_unlock(&recall_lock); |
1da177e4 LT |
2607 | } |
2608 | ||
1da177e4 LT |
2609 | static |
2610 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2611 | { | |
2612 | if (arg & F_UNLCK) | |
2613 | return lease_modify(onlist, arg); | |
2614 | else | |
2615 | return -EAGAIN; | |
2616 | } | |
2617 | ||
7b021967 | 2618 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2619 | .lm_break = nfsd_break_deleg_cb, |
2620 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2621 | }; |
2622 | ||
7a8711c9 BF |
2623 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2624 | { | |
2625 | if (nfsd4_has_session(cstate)) | |
2626 | return nfs_ok; | |
2627 | if (seqid == so->so_seqid - 1) | |
2628 | return nfserr_replay_me; | |
2629 | if (seqid == so->so_seqid) | |
2630 | return nfs_ok; | |
2631 | return nfserr_bad_seqid; | |
2632 | } | |
1da177e4 | 2633 | |
b37ad28b | 2634 | __be32 |
6668958f AA |
2635 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2636 | struct nfsd4_open *open) | |
1da177e4 | 2637 | { |
1da177e4 LT |
2638 | clientid_t *clientid = &open->op_clientid; |
2639 | struct nfs4_client *clp = NULL; | |
2640 | unsigned int strhashval; | |
fe0750e5 | 2641 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 2642 | __be32 status; |
1da177e4 | 2643 | |
1da177e4 LT |
2644 | if (STALE_CLIENTID(&open->op_clientid)) |
2645 | return nfserr_stale_clientid; | |
32513b40 BF |
2646 | /* |
2647 | * In case we need it later, after we've already created the | |
2648 | * file and don't want to risk a further failure: | |
2649 | */ | |
2650 | open->op_file = nfsd4_alloc_file(); | |
2651 | if (open->op_file == NULL) | |
2652 | return nfserr_jukebox; | |
1da177e4 | 2653 | |
16bfdaaf | 2654 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2655 | oo = find_openstateowner_str(strhashval, open); |
2656 | open->op_openowner = oo; | |
2657 | if (!oo) { | |
1da177e4 LT |
2658 | clp = find_confirmed_client(clientid); |
2659 | if (clp == NULL) | |
0f442aa2 | 2660 | return nfserr_expired; |
bcf130f9 | 2661 | goto new_owner; |
1da177e4 | 2662 | } |
dad1c067 | 2663 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 2664 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2665 | clp = oo->oo_owner.so_client; |
2666 | release_openowner(oo); | |
2667 | open->op_openowner = NULL; | |
bcf130f9 | 2668 | goto new_owner; |
0f442aa2 | 2669 | } |
4cdc951b BF |
2670 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
2671 | if (status) | |
2672 | return status; | |
2673 | clp = oo->oo_owner.so_client; | |
2674 | goto alloc_stateid; | |
bcf130f9 BF |
2675 | new_owner: |
2676 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2677 | if (oo == NULL) | |
2678 | return nfserr_jukebox; | |
2679 | open->op_openowner = oo; | |
4cdc951b BF |
2680 | alloc_stateid: |
2681 | open->op_stp = nfs4_alloc_stateid(clp); | |
2682 | if (!open->op_stp) | |
2683 | return nfserr_jukebox; | |
0f442aa2 | 2684 | return nfs_ok; |
1da177e4 LT |
2685 | } |
2686 | ||
b37ad28b | 2687 | static inline __be32 |
4a6e43e6 N |
2688 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2689 | { | |
2690 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2691 | return nfserr_openmode; | |
2692 | else | |
2693 | return nfs_ok; | |
2694 | } | |
2695 | ||
f459e453 | 2696 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 2697 | { |
f459e453 | 2698 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
2699 | } |
2700 | ||
38c2f4b1 | 2701 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 2702 | { |
f459e453 | 2703 | struct nfs4_stid *ret; |
24a0111e | 2704 | |
38c2f4b1 | 2705 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
f459e453 BF |
2706 | if (!ret) |
2707 | return NULL; | |
2708 | return delegstateid(ret); | |
24a0111e BF |
2709 | } |
2710 | ||
8b289b2c BF |
2711 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
2712 | { | |
2713 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
2714 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
2715 | } | |
2716 | ||
b37ad28b | 2717 | static __be32 |
38c2f4b1 | 2718 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
567d9829 N |
2719 | struct nfs4_delegation **dp) |
2720 | { | |
2721 | int flags; | |
b37ad28b | 2722 | __be32 status = nfserr_bad_stateid; |
567d9829 | 2723 | |
38c2f4b1 | 2724 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
567d9829 | 2725 | if (*dp == NULL) |
c44c5eeb | 2726 | goto out; |
24a0111e | 2727 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2728 | status = nfs4_check_delegmode(*dp, flags); |
2729 | if (status) | |
2730 | *dp = NULL; | |
c44c5eeb | 2731 | out: |
8b289b2c | 2732 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
2733 | return nfs_ok; |
2734 | if (status) | |
2735 | return status; | |
dad1c067 | 2736 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 2737 | return nfs_ok; |
567d9829 N |
2738 | } |
2739 | ||
b37ad28b | 2740 | static __be32 |
dcef0413 | 2741 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
1da177e4 | 2742 | { |
dcef0413 | 2743 | struct nfs4_ol_stateid *local; |
fe0750e5 | 2744 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2745 | |
8beefa24 | 2746 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2747 | /* ignore lock owners */ |
2748 | if (local->st_stateowner->so_is_open_owner == 0) | |
2749 | continue; | |
2750 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2751 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2752 | *stpp = local; |
2753 | /* check for conflicting share reservations */ | |
2754 | if (!test_share(local, open)) | |
77eaae8d | 2755 | return nfserr_share_denied; |
1da177e4 | 2756 | } |
77eaae8d | 2757 | return nfs_ok; |
1da177e4 LT |
2758 | } |
2759 | ||
996e0938 BF |
2760 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
2761 | { | |
2762 | kmem_cache_free(stateid_slab, s); | |
5ac049ac N |
2763 | } |
2764 | ||
21fb4016 BF |
2765 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2766 | { | |
2767 | int flags = 0; | |
2768 | ||
2769 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2770 | flags |= NFSD_MAY_READ; | |
2771 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2772 | flags |= NFSD_MAY_WRITE; | |
2773 | return flags; | |
2774 | } | |
2775 | ||
0c12eaff CB |
2776 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2777 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2778 | { |
2779 | __be32 status; | |
0c12eaff CB |
2780 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2781 | int access = nfs4_access_to_access(open->op_share_access); | |
2782 | ||
f9d7562f BF |
2783 | if (!fp->fi_fds[oflag]) { |
2784 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2785 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2786 | if (status) |
2787 | return status; | |
2788 | } | |
2789 | nfs4_file_get_access(fp, oflag); | |
2790 | ||
2791 | return nfs_ok; | |
2792 | } | |
2793 | ||
b37ad28b | 2794 | static inline __be32 |
1da177e4 LT |
2795 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2796 | struct nfsd4_open *open) | |
2797 | { | |
2798 | struct iattr iattr = { | |
2799 | .ia_valid = ATTR_SIZE, | |
2800 | .ia_size = 0, | |
2801 | }; | |
2802 | if (!open->op_truncate) | |
2803 | return 0; | |
2804 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2805 | return nfserr_inval; |
1da177e4 LT |
2806 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2807 | } | |
2808 | ||
b37ad28b | 2809 | static __be32 |
dcef0413 | 2810 | 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 | 2811 | { |
b6d2f1ca | 2812 | u32 op_share_access = open->op_share_access; |
7d947842 | 2813 | bool new_access; |
b37ad28b | 2814 | __be32 status; |
1da177e4 | 2815 | |
82c5ff1b | 2816 | new_access = !test_access(op_share_access, stp); |
f9d7562f | 2817 | if (new_access) { |
0c12eaff | 2818 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2819 | if (status) |
2820 | return status; | |
6c26d08f | 2821 | } |
1da177e4 LT |
2822 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2823 | if (status) { | |
f9d7562f | 2824 | if (new_access) { |
f197c271 | 2825 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2826 | nfs4_file_put_access(fp, oflag); |
2827 | } | |
1da177e4 LT |
2828 | return status; |
2829 | } | |
2830 | /* remember the open */ | |
82c5ff1b | 2831 | set_access(op_share_access, stp); |
ce0fc43c | 2832 | set_deny(open->op_share_deny, stp); |
1da177e4 LT |
2833 | |
2834 | return nfs_ok; | |
2835 | } | |
2836 | ||
2837 | ||
1da177e4 | 2838 | static void |
1255a8f3 | 2839 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
1da177e4 | 2840 | { |
dad1c067 | 2841 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
2842 | } |
2843 | ||
14a24e99 BF |
2844 | /* Should we give out recallable state?: */ |
2845 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2846 | { | |
2847 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2848 | return true; | |
2849 | /* | |
2850 | * In the sessions case, since we don't have to establish a | |
2851 | * separate connection for callbacks, we assume it's OK | |
2852 | * until we hear otherwise: | |
2853 | */ | |
2854 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2855 | } | |
2856 | ||
22d38c4c BF |
2857 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2858 | { | |
2859 | struct file_lock *fl; | |
2860 | ||
2861 | fl = locks_alloc_lock(); | |
2862 | if (!fl) | |
2863 | return NULL; | |
2864 | locks_init_lock(fl); | |
2865 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2866 | fl->fl_flags = FL_LEASE; | |
2867 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2868 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2869 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2870 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2871 | return fl; |
2872 | } | |
2873 | ||
edab9782 BF |
2874 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2875 | { | |
acfdf5c3 | 2876 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2877 | struct file_lock *fl; |
2878 | int status; | |
2879 | ||
2880 | fl = nfs4_alloc_init_lease(dp, flag); | |
2881 | if (!fl) | |
2882 | return -ENOMEM; | |
acfdf5c3 | 2883 | fl->fl_file = find_readable_file(fp); |
2a74aba7 | 2884 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
acfdf5c3 | 2885 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
edab9782 | 2886 | if (status) { |
acfdf5c3 | 2887 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2888 | locks_free_lock(fl); |
2889 | return -ENOMEM; | |
2890 | } | |
acfdf5c3 BF |
2891 | fp->fi_lease = fl; |
2892 | fp->fi_deleg_file = fl->fl_file; | |
2893 | get_file(fp->fi_deleg_file); | |
2894 | atomic_set(&fp->fi_delegees, 1); | |
2895 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2896 | return 0; | |
2897 | } | |
2898 | ||
2899 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2900 | { | |
2901 | struct nfs4_file *fp = dp->dl_file; | |
2902 | ||
2903 | if (!fp->fi_lease) | |
2904 | return nfs4_setlease(dp, flag); | |
2905 | spin_lock(&recall_lock); | |
2906 | if (fp->fi_had_conflict) { | |
2907 | spin_unlock(&recall_lock); | |
2908 | return -EAGAIN; | |
2909 | } | |
2910 | atomic_inc(&fp->fi_delegees); | |
2911 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2912 | spin_unlock(&recall_lock); | |
2a74aba7 | 2913 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
edab9782 BF |
2914 | return 0; |
2915 | } | |
2916 | ||
4aa8913c BH |
2917 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
2918 | { | |
2919 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
2920 | if (status == -EAGAIN) | |
2921 | open->op_why_no_deleg = WND4_CONTENTION; | |
2922 | else { | |
2923 | open->op_why_no_deleg = WND4_RESOURCE; | |
2924 | switch (open->op_deleg_want) { | |
2925 | case NFS4_SHARE_WANT_READ_DELEG: | |
2926 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
2927 | case NFS4_SHARE_WANT_ANY_DELEG: | |
2928 | break; | |
2929 | case NFS4_SHARE_WANT_CANCEL: | |
2930 | open->op_why_no_deleg = WND4_CANCELLED; | |
2931 | break; | |
2932 | case NFS4_SHARE_WANT_NO_DELEG: | |
2933 | BUG(); /* not supposed to get here */ | |
2934 | } | |
2935 | } | |
2936 | } | |
2937 | ||
1da177e4 LT |
2938 | /* |
2939 | * Attempt to hand out a delegation. | |
2940 | */ | |
2941 | static void | |
dcef0413 | 2942 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
2943 | { |
2944 | struct nfs4_delegation *dp; | |
fe0750e5 | 2945 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2946 | int cb_up; |
d24433cd | 2947 | int status = 0, flag = 0; |
1da177e4 | 2948 | |
fe0750e5 | 2949 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2950 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2951 | open->op_recall = 0; |
2952 | switch (open->op_claim_type) { | |
2953 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2954 | if (!cb_up) |
7b190fec N |
2955 | open->op_recall = 1; |
2956 | flag = open->op_delegate_type; | |
2957 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2958 | goto out; | |
2959 | break; | |
2960 | case NFS4_OPEN_CLAIM_NULL: | |
2961 | /* Let's not give out any delegations till everyone's | |
2962 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2963 | if (locks_in_grace()) |
7b190fec | 2964 | goto out; |
dad1c067 | 2965 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
7b190fec N |
2966 | goto out; |
2967 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2968 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2969 | else | |
2970 | flag = NFS4_OPEN_DELEGATE_READ; | |
2971 | break; | |
2972 | default: | |
2973 | goto out; | |
2974 | } | |
1da177e4 | 2975 | |
fe0750e5 | 2976 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2977 | if (dp == NULL) |
2978 | goto out_no_deleg; | |
acfdf5c3 | 2979 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2980 | if (status) |
dd239cc0 | 2981 | goto out_free; |
1da177e4 | 2982 | |
d5477a8d | 2983 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 2984 | |
8c10cbdb | 2985 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 2986 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
1da177e4 LT |
2987 | out: |
2988 | open->op_delegate_type = flag; | |
d24433cd BH |
2989 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
2990 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
2991 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2992 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
2993 | ||
4aa8913c BH |
2994 | /* 4.1 client asking for a delegation? */ |
2995 | if (open->op_deleg_want) | |
2996 | nfsd4_open_deleg_none_ext(open, status); | |
d24433cd | 2997 | } |
dd239cc0 BF |
2998 | return; |
2999 | out_free: | |
acfdf5c3 | 3000 | nfs4_put_delegation(dp); |
dd239cc0 BF |
3001 | out_no_deleg: |
3002 | flag = NFS4_OPEN_DELEGATE_NONE; | |
3003 | goto out; | |
1da177e4 LT |
3004 | } |
3005 | ||
e27f49c3 BH |
3006 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
3007 | struct nfs4_delegation *dp) | |
3008 | { | |
3009 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
3010 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3011 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3012 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
3013 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
3014 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
3015 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3016 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
3017 | } | |
3018 | /* Otherwise the client must be confused wanting a delegation | |
3019 | * it already has, therefore we don't return | |
3020 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
3021 | */ | |
3022 | } | |
3023 | ||
1da177e4 LT |
3024 | /* |
3025 | * called with nfs4_lock_state() held. | |
3026 | */ | |
b37ad28b | 3027 | __be32 |
1da177e4 LT |
3028 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
3029 | { | |
6668958f | 3030 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 3031 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 LT |
3032 | struct nfs4_file *fp = NULL; |
3033 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
dcef0413 | 3034 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 3035 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 3036 | __be32 status; |
1da177e4 | 3037 | |
1da177e4 LT |
3038 | /* |
3039 | * Lookup file; if found, lookup stateid and check open request, | |
3040 | * and check for delegations in the process of being recalled. | |
3041 | * If not found, create the nfs4_file struct | |
3042 | */ | |
3043 | fp = find_file(ino); | |
3044 | if (fp) { | |
3045 | if ((status = nfs4_check_open(fp, open, &stp))) | |
3046 | goto out; | |
38c2f4b1 | 3047 | status = nfs4_check_deleg(cl, fp, open, &dp); |
c44c5eeb N |
3048 | if (status) |
3049 | goto out; | |
1da177e4 | 3050 | } else { |
c44c5eeb | 3051 | status = nfserr_bad_stateid; |
8b289b2c | 3052 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 3053 | goto out; |
3e772463 | 3054 | status = nfserr_jukebox; |
32513b40 BF |
3055 | fp = open->op_file; |
3056 | open->op_file = NULL; | |
3057 | nfsd4_init_file(fp, ino); | |
1da177e4 LT |
3058 | } |
3059 | ||
3060 | /* | |
3061 | * OPEN the file, or upgrade an existing OPEN. | |
3062 | * If truncate fails, the OPEN fails. | |
3063 | */ | |
3064 | if (stp) { | |
3065 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 3066 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
3067 | if (status) |
3068 | goto out; | |
3069 | } else { | |
4cdc951b | 3070 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
567d9829 | 3071 | if (status) |
1da177e4 | 3072 | goto out; |
4cdc951b BF |
3073 | stp = open->op_stp; |
3074 | open->op_stp = NULL; | |
996e0938 | 3075 | init_open_stateid(stp, fp, open); |
1da177e4 LT |
3076 | status = nfsd4_truncate(rqstp, current_fh, open); |
3077 | if (status) { | |
2283963f | 3078 | release_open_stateid(stp); |
1da177e4 LT |
3079 | goto out; |
3080 | } | |
3081 | } | |
dcef0413 BF |
3082 | update_stateid(&stp->st_stid.sc_stateid); |
3083 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3084 | |
d24433cd | 3085 | if (nfsd4_has_session(&resp->cstate)) { |
dad1c067 | 3086 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
6668958f | 3087 | |
d24433cd BH |
3088 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
3089 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
3090 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
3091 | goto nodeleg; | |
3092 | } | |
3093 | } | |
3094 | ||
1da177e4 LT |
3095 | /* |
3096 | * Attempt to hand out a delegation. No error return, because the | |
3097 | * OPEN succeeds even if we fail. | |
3098 | */ | |
3099 | nfs4_open_delegation(current_fh, open, stp); | |
d24433cd | 3100 | nodeleg: |
1da177e4 LT |
3101 | status = nfs_ok; |
3102 | ||
8c10cbdb | 3103 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 3104 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 3105 | out: |
d24433cd BH |
3106 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
3107 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
3108 | open->op_deleg_want) |
3109 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 3110 | |
13cd2184 N |
3111 | if (fp) |
3112 | put_nfs4_file(fp); | |
37515177 | 3113 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1255a8f3 | 3114 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
1da177e4 LT |
3115 | /* |
3116 | * To finish the open response, we just need to set the rflags. | |
3117 | */ | |
3118 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
dad1c067 | 3119 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
6668958f | 3120 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
3121 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
3122 | ||
3123 | return status; | |
3124 | } | |
3125 | ||
d29b20cd BF |
3126 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
3127 | { | |
3128 | if (open->op_openowner) { | |
3129 | struct nfs4_openowner *oo = open->op_openowner; | |
3130 | ||
3131 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3132 | list_del_init(&oo->oo_close_lru); | |
3133 | if (oo->oo_flags & NFS4_OO_NEW) { | |
3134 | if (status) { | |
3135 | release_openowner(oo); | |
3136 | open->op_openowner = NULL; | |
3137 | } else | |
3138 | oo->oo_flags &= ~NFS4_OO_NEW; | |
3139 | } | |
3140 | } | |
32513b40 BF |
3141 | if (open->op_file) |
3142 | nfsd4_free_file(open->op_file); | |
4cdc951b BF |
3143 | if (open->op_stp) |
3144 | nfs4_free_stateid(open->op_stp); | |
d29b20cd BF |
3145 | } |
3146 | ||
b37ad28b | 3147 | __be32 |
b591480b BF |
3148 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3149 | clientid_t *clid) | |
1da177e4 LT |
3150 | { |
3151 | struct nfs4_client *clp; | |
b37ad28b | 3152 | __be32 status; |
1da177e4 LT |
3153 | |
3154 | nfs4_lock_state(); | |
3155 | dprintk("process_renew(%08x/%08x): starting\n", | |
3156 | clid->cl_boot, clid->cl_id); | |
3157 | status = nfserr_stale_clientid; | |
3158 | if (STALE_CLIENTID(clid)) | |
3159 | goto out; | |
3160 | clp = find_confirmed_client(clid); | |
3161 | status = nfserr_expired; | |
3162 | if (clp == NULL) { | |
3163 | /* We assume the client took too long to RENEW. */ | |
3164 | dprintk("nfsd4_renew: clientid not found!\n"); | |
3165 | goto out; | |
3166 | } | |
1da177e4 | 3167 | status = nfserr_cb_path_down; |
ea1da636 | 3168 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 3169 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
3170 | goto out; |
3171 | status = nfs_ok; | |
3172 | out: | |
3173 | nfs4_unlock_state(); | |
3174 | return status; | |
3175 | } | |
3176 | ||
c47d832b | 3177 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
3178 | }; |
3179 | ||
33dcc481 JL |
3180 | static bool grace_ended; |
3181 | ||
a76b4319 | 3182 | static void |
af558e33 | 3183 | nfsd4_end_grace(void) |
a76b4319 | 3184 | { |
33dcc481 JL |
3185 | /* do nothing if grace period already ended */ |
3186 | if (grace_ended) | |
3187 | return; | |
3188 | ||
a76b4319 | 3189 | dprintk("NFSD: end of grace period\n"); |
33dcc481 | 3190 | grace_ended = true; |
2a4317c5 | 3191 | nfsd4_record_grace_done(&init_net, boot_time); |
af558e33 | 3192 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
3193 | /* |
3194 | * Now that every NFSv4 client has had the chance to recover and | |
3195 | * to see the (possibly new, possibly shorter) lease time, we | |
3196 | * can safely set the next grace time to the current lease time: | |
3197 | */ | |
3198 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
3199 | } |
3200 | ||
fd39ca9a | 3201 | static time_t |
1da177e4 LT |
3202 | nfs4_laundromat(void) |
3203 | { | |
3204 | struct nfs4_client *clp; | |
fe0750e5 | 3205 | struct nfs4_openowner *oo; |
1da177e4 LT |
3206 | struct nfs4_delegation *dp; |
3207 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3208 | time_t cutoff = get_seconds() - nfsd4_lease; |
3209 | time_t t, clientid_val = nfsd4_lease; | |
3210 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3211 | |
3212 | nfs4_lock_state(); | |
3213 | ||
3214 | dprintk("NFSD: laundromat service - starting\n"); | |
33dcc481 | 3215 | nfsd4_end_grace(); |
36acb66b BH |
3216 | INIT_LIST_HEAD(&reaplist); |
3217 | spin_lock(&client_lock); | |
1da177e4 LT |
3218 | list_for_each_safe(pos, next, &client_lru) { |
3219 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3220 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3221 | t = clp->cl_time - cutoff; | |
3222 | if (clientid_val > t) | |
3223 | clientid_val = t; | |
3224 | break; | |
3225 | } | |
d7682988 BH |
3226 | if (atomic_read(&clp->cl_refcount)) { |
3227 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3228 | clp->cl_clientid.cl_id); | |
3229 | continue; | |
3230 | } | |
3231 | unhash_client_locked(clp); | |
3232 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3233 | } |
3234 | spin_unlock(&client_lock); | |
3235 | list_for_each_safe(pos, next, &reaplist) { | |
3236 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3237 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3238 | clp->cl_clientid.cl_id); | |
2a4317c5 | 3239 | nfsd4_client_record_remove(clp); |
1da177e4 LT |
3240 | expire_client(clp); |
3241 | } | |
1da177e4 LT |
3242 | spin_lock(&recall_lock); |
3243 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3244 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3245 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3246 | u = dp->dl_time - cutoff; | |
3247 | if (test_val > u) | |
3248 | test_val = u; | |
3249 | break; | |
3250 | } | |
1da177e4 LT |
3251 | list_move(&dp->dl_recall_lru, &reaplist); |
3252 | } | |
3253 | spin_unlock(&recall_lock); | |
3254 | list_for_each_safe(pos, next, &reaplist) { | |
3255 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
3256 | unhash_delegation(dp); |
3257 | } | |
cf07d2ea | 3258 | test_val = nfsd4_lease; |
1da177e4 | 3259 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3260 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3261 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3262 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3263 | if (test_val > u) |
3264 | test_val = u; | |
3265 | break; | |
3266 | } | |
fe0750e5 | 3267 | release_openowner(oo); |
1da177e4 LT |
3268 | } |
3269 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3270 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3271 | nfs4_unlock_state(); | |
3272 | return clientid_val; | |
3273 | } | |
3274 | ||
a254b246 HH |
3275 | static struct workqueue_struct *laundry_wq; |
3276 | static void laundromat_main(struct work_struct *); | |
3277 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3278 | ||
3279 | static void | |
c4028958 | 3280 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3281 | { |
3282 | time_t t; | |
3283 | ||
3284 | t = nfs4_laundromat(); | |
3285 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3286 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3287 | } |
3288 | ||
f7a4d872 | 3289 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
1da177e4 | 3290 | { |
f7a4d872 BF |
3291 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
3292 | return nfserr_bad_stateid; | |
3293 | return nfs_ok; | |
1da177e4 LT |
3294 | } |
3295 | ||
3296 | static int | |
3297 | STALE_STATEID(stateid_t *stateid) | |
3298 | { | |
d3b313a4 | 3299 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
e4e83ea4 BF |
3300 | return 0; |
3301 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3302 | STATEID_VAL(stateid)); |
e4e83ea4 | 3303 | return 1; |
1da177e4 LT |
3304 | } |
3305 | ||
3306 | static inline int | |
82c5ff1b | 3307 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 3308 | { |
82c5ff1b JL |
3309 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
3310 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
3311 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
3312 | } |
3313 | ||
3314 | static inline int | |
82c5ff1b | 3315 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 3316 | { |
82c5ff1b JL |
3317 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
3318 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
3319 | } |
3320 | ||
3321 | static | |
dcef0413 | 3322 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 3323 | { |
b37ad28b | 3324 | __be32 status = nfserr_openmode; |
1da177e4 | 3325 | |
02921914 BF |
3326 | /* For lock stateid's, we test the parent open, not the lock: */ |
3327 | if (stp->st_openstp) | |
3328 | stp = stp->st_openstp; | |
82c5ff1b | 3329 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 3330 | goto out; |
82c5ff1b | 3331 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
3332 | goto out; |
3333 | status = nfs_ok; | |
3334 | out: | |
3335 | return status; | |
3336 | } | |
3337 | ||
b37ad28b | 3338 | static inline __be32 |
1da177e4 LT |
3339 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3340 | { | |
203a8c8e | 3341 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3342 | return nfs_ok; |
af558e33 | 3343 | else if (locks_in_grace()) { |
25985edc | 3344 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3345 | * conflicting state; so we must wait out the grace period. */ |
3346 | return nfserr_grace; | |
3347 | } else if (flags & WR_STATE) | |
3348 | return nfs4_share_conflict(current_fh, | |
3349 | NFS4_SHARE_DENY_WRITE); | |
3350 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3351 | return nfs4_share_conflict(current_fh, | |
3352 | NFS4_SHARE_DENY_READ); | |
3353 | } | |
3354 | ||
3355 | /* | |
3356 | * Allow READ/WRITE during grace period on recovered state only for files | |
3357 | * that are not able to provide mandatory locking. | |
3358 | */ | |
3359 | static inline int | |
18f82731 | 3360 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3361 | { |
203a8c8e | 3362 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3363 | } |
3364 | ||
81b82965 BF |
3365 | /* Returns true iff a is later than b: */ |
3366 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3367 | { | |
3368 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3369 | } | |
3370 | ||
57b7b43b | 3371 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3372 | { |
6668958f AA |
3373 | /* |
3374 | * When sessions are used the stateid generation number is ignored | |
3375 | * when it is zero. | |
3376 | */ | |
28dde241 | 3377 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3378 | return nfs_ok; |
3379 | ||
3380 | if (in->si_generation == ref->si_generation) | |
3381 | return nfs_ok; | |
6668958f | 3382 | |
0836f587 | 3383 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3384 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3385 | return nfserr_bad_stateid; |
3386 | /* | |
81b82965 BF |
3387 | * However, we could see a stateid from the past, even from a |
3388 | * non-buggy client. For example, if the client sends a lock | |
3389 | * while some IO is outstanding, the lock may bump si_generation | |
3390 | * while the IO is still in flight. The client could avoid that | |
3391 | * situation by waiting for responses on all the IO requests, | |
3392 | * but better performance may result in retrying IO that | |
3393 | * receives an old_stateid error if requests are rarely | |
3394 | * reordered in flight: | |
0836f587 | 3395 | */ |
81b82965 | 3396 | return nfserr_old_stateid; |
0836f587 BF |
3397 | } |
3398 | ||
38c2f4b1 | 3399 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 3400 | { |
97b7e3b6 BF |
3401 | struct nfs4_stid *s; |
3402 | struct nfs4_ol_stateid *ols; | |
3403 | __be32 status; | |
17456804 BS |
3404 | |
3405 | if (STALE_STATEID(stateid)) | |
97b7e3b6 | 3406 | return nfserr_stale_stateid; |
17456804 | 3407 | |
38c2f4b1 | 3408 | s = find_stateid(cl, stateid); |
97b7e3b6 BF |
3409 | if (!s) |
3410 | return nfserr_stale_stateid; | |
36279ac1 | 3411 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
17456804 | 3412 | if (status) |
97b7e3b6 BF |
3413 | return status; |
3414 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) | |
3415 | return nfs_ok; | |
3416 | ols = openlockstateid(s); | |
3417 | if (ols->st_stateowner->so_is_open_owner | |
dad1c067 | 3418 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
97b7e3b6 BF |
3419 | return nfserr_bad_stateid; |
3420 | return nfs_ok; | |
17456804 BS |
3421 | } |
3422 | ||
38c2f4b1 BF |
3423 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
3424 | { | |
3425 | struct nfs4_client *cl; | |
3426 | ||
3427 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3428 | return nfserr_bad_stateid; | |
3429 | if (STALE_STATEID(stateid)) | |
3430 | return nfserr_stale_stateid; | |
3431 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); | |
3432 | if (!cl) | |
3433 | return nfserr_expired; | |
3434 | *s = find_stateid_by_type(cl, stateid, typemask); | |
3435 | if (!*s) | |
3436 | return nfserr_bad_stateid; | |
3437 | return nfs_ok; | |
3438 | ||
3439 | } | |
3440 | ||
1da177e4 LT |
3441 | /* |
3442 | * Checks for stateid operations | |
3443 | */ | |
b37ad28b | 3444 | __be32 |
dd453dfd BH |
3445 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3446 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 | 3447 | { |
69064a27 | 3448 | struct nfs4_stid *s; |
dcef0413 | 3449 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 3450 | struct nfs4_delegation *dp = NULL; |
dd453dfd | 3451 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3452 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3453 | __be32 status; |
1da177e4 | 3454 | |
1da177e4 LT |
3455 | if (filpp) |
3456 | *filpp = NULL; | |
3457 | ||
18f82731 | 3458 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3459 | return nfserr_grace; |
3460 | ||
3461 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3462 | return check_special_stateids(current_fh, stateid, flags); | |
3463 | ||
38c2f4b1 BF |
3464 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
3465 | if (status) | |
3466 | return status; | |
69064a27 BF |
3467 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
3468 | if (status) | |
3469 | goto out; | |
f7a4d872 BF |
3470 | switch (s->sc_type) { |
3471 | case NFS4_DELEG_STID: | |
69064a27 | 3472 | dp = delegstateid(s); |
dc9bf700 BF |
3473 | status = nfs4_check_delegmode(dp, flags); |
3474 | if (status) | |
3475 | goto out; | |
43b0178e | 3476 | if (filpp) { |
acfdf5c3 | 3477 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3478 | BUG_ON(!*filpp); |
3479 | } | |
f7a4d872 BF |
3480 | break; |
3481 | case NFS4_OPEN_STID: | |
3482 | case NFS4_LOCK_STID: | |
69064a27 | 3483 | stp = openlockstateid(s); |
f7a4d872 BF |
3484 | status = nfs4_check_fh(current_fh, stp); |
3485 | if (status) | |
1da177e4 | 3486 | goto out; |
fe0750e5 | 3487 | if (stp->st_stateowner->so_is_open_owner |
dad1c067 | 3488 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
1da177e4 | 3489 | goto out; |
a4455be0 BF |
3490 | status = nfs4_check_openmode(stp, flags); |
3491 | if (status) | |
1da177e4 | 3492 | goto out; |
f9d7562f BF |
3493 | if (filpp) { |
3494 | if (flags & RD_STATE) | |
3495 | *filpp = find_readable_file(stp->st_file); | |
3496 | else | |
3497 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3498 | } |
f7a4d872 BF |
3499 | break; |
3500 | default: | |
3501 | return nfserr_bad_stateid; | |
1da177e4 LT |
3502 | } |
3503 | status = nfs_ok; | |
3504 | out: | |
3505 | return status; | |
3506 | } | |
3507 | ||
e1ca12df | 3508 | static __be32 |
dcef0413 | 3509 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
e1ca12df | 3510 | { |
fe0750e5 | 3511 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3512 | return nfserr_locks_held; |
3513 | release_lock_stateid(stp); | |
3514 | return nfs_ok; | |
3515 | } | |
3516 | ||
17456804 BS |
3517 | /* |
3518 | * Test if the stateid is valid | |
3519 | */ | |
3520 | __be32 | |
3521 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3522 | struct nfsd4_test_stateid *test_stateid) | |
3523 | { | |
03cfb420 BS |
3524 | struct nfsd4_test_stateid_id *stateid; |
3525 | struct nfs4_client *cl = cstate->session->se_client; | |
3526 | ||
3527 | nfs4_lock_state(); | |
3528 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) | |
3529 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); | |
3530 | nfs4_unlock_state(); | |
3531 | ||
17456804 BS |
3532 | return nfs_ok; |
3533 | } | |
3534 | ||
e1ca12df BS |
3535 | __be32 |
3536 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3537 | struct nfsd4_free_stateid *free_stateid) | |
3538 | { | |
3539 | stateid_t *stateid = &free_stateid->fr_stateid; | |
2da1cec7 | 3540 | struct nfs4_stid *s; |
38c2f4b1 | 3541 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 3542 | __be32 ret = nfserr_bad_stateid; |
e1ca12df BS |
3543 | |
3544 | nfs4_lock_state(); | |
38c2f4b1 | 3545 | s = find_stateid(cl, stateid); |
2da1cec7 | 3546 | if (!s) |
81b82965 | 3547 | goto out; |
2da1cec7 BF |
3548 | switch (s->sc_type) { |
3549 | case NFS4_DELEG_STID: | |
e1ca12df BS |
3550 | ret = nfserr_locks_held; |
3551 | goto out; | |
2da1cec7 BF |
3552 | case NFS4_OPEN_STID: |
3553 | case NFS4_LOCK_STID: | |
3554 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
3555 | if (ret) | |
3556 | goto out; | |
3557 | if (s->sc_type == NFS4_LOCK_STID) | |
3558 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); | |
3559 | else | |
3560 | ret = nfserr_locks_held; | |
f7a4d872 BF |
3561 | break; |
3562 | default: | |
3563 | ret = nfserr_bad_stateid; | |
e1ca12df | 3564 | } |
e1ca12df BS |
3565 | out: |
3566 | nfs4_unlock_state(); | |
3567 | return ret; | |
3568 | } | |
3569 | ||
4c4cd222 N |
3570 | static inline int |
3571 | setlkflg (int type) | |
3572 | { | |
3573 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3574 | RD_STATE : WR_STATE; | |
3575 | } | |
1da177e4 | 3576 | |
dcef0413 | 3577 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
3578 | { |
3579 | struct svc_fh *current_fh = &cstate->current_fh; | |
3580 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
3581 | __be32 status; | |
3582 | ||
c0a5d93e BF |
3583 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3584 | if (status) | |
3585 | return status; | |
f7a4d872 BF |
3586 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
3587 | /* | |
3588 | * "Closed" stateid's exist *only* to return | |
3589 | * nfserr_replay_me from the previous step. | |
3590 | */ | |
3591 | return nfserr_bad_stateid; | |
3592 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); | |
3593 | if (status) | |
3594 | return status; | |
3595 | return nfs4_check_fh(current_fh, stp); | |
c0a5d93e BF |
3596 | } |
3597 | ||
1da177e4 LT |
3598 | /* |
3599 | * Checks for sequence id mutating operations. | |
3600 | */ | |
b37ad28b | 3601 | static __be32 |
dd453dfd | 3602 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 3603 | stateid_t *stateid, char typemask, |
dcef0413 | 3604 | struct nfs4_ol_stateid **stpp) |
1da177e4 | 3605 | { |
0836f587 | 3606 | __be32 status; |
38c2f4b1 | 3607 | struct nfs4_stid *s; |
1da177e4 | 3608 | |
8c10cbdb BH |
3609 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3610 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3611 | |
1da177e4 | 3612 | *stpp = NULL; |
38c2f4b1 | 3613 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
c0a5d93e BF |
3614 | if (status) |
3615 | return status; | |
38c2f4b1 | 3616 | *stpp = openlockstateid(s); |
c0a5d93e | 3617 | cstate->replay_owner = (*stpp)->st_stateowner; |
1da177e4 | 3618 | |
c0a5d93e BF |
3619 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
3620 | } | |
39325bd0 | 3621 | |
dcef0413 | 3622 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
c0a5d93e BF |
3623 | { |
3624 | __be32 status; | |
3625 | struct nfs4_openowner *oo; | |
1da177e4 | 3626 | |
c0a5d93e | 3627 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
2288d0e3 | 3628 | NFS4_OPEN_STID, stpp); |
7a8711c9 BF |
3629 | if (status) |
3630 | return status; | |
c0a5d93e | 3631 | oo = openowner((*stpp)->st_stateowner); |
dad1c067 | 3632 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
3a4f98bb | 3633 | return nfserr_bad_stateid; |
3a4f98bb | 3634 | return nfs_ok; |
1da177e4 LT |
3635 | } |
3636 | ||
b37ad28b | 3637 | __be32 |
ca364317 | 3638 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3639 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3640 | { |
b37ad28b | 3641 | __be32 status; |
fe0750e5 | 3642 | struct nfs4_openowner *oo; |
dcef0413 | 3643 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3644 | |
3645 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3646 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3647 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3648 | |
ca364317 | 3649 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3650 | if (status) |
3651 | return status; | |
1da177e4 LT |
3652 | |
3653 | nfs4_lock_state(); | |
3654 | ||
9072d5c6 | 3655 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3656 | oc->oc_seqid, &oc->oc_req_stateid, |
2288d0e3 | 3657 | NFS4_OPEN_STID, &stp); |
9072d5c6 | 3658 | if (status) |
68b66e82 | 3659 | goto out; |
fe0750e5 | 3660 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3661 | status = nfserr_bad_stateid; |
dad1c067 | 3662 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
68b66e82 | 3663 | goto out; |
dad1c067 | 3664 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
dcef0413 BF |
3665 | update_stateid(&stp->st_stid.sc_stateid); |
3666 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
8c10cbdb | 3667 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 3668 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 3669 | |
2a4317c5 | 3670 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 3671 | status = nfs_ok; |
1da177e4 | 3672 | out: |
5ec094c1 BF |
3673 | if (!cstate->replay_owner) |
3674 | nfs4_unlock_state(); | |
1da177e4 LT |
3675 | return status; |
3676 | } | |
3677 | ||
6409a5a6 | 3678 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 3679 | { |
82c5ff1b | 3680 | if (!test_access(access, stp)) |
6409a5a6 BF |
3681 | return; |
3682 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); | |
82c5ff1b | 3683 | clear_access(access, stp); |
6409a5a6 | 3684 | } |
f197c271 | 3685 | |
6409a5a6 BF |
3686 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
3687 | { | |
3688 | switch (to_access) { | |
3689 | case NFS4_SHARE_ACCESS_READ: | |
3690 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
3691 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3692 | break; | |
3693 | case NFS4_SHARE_ACCESS_WRITE: | |
3694 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
3695 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
3696 | break; | |
3697 | case NFS4_SHARE_ACCESS_BOTH: | |
3698 | break; | |
3699 | default: | |
3700 | BUG(); | |
1da177e4 LT |
3701 | } |
3702 | } | |
3703 | ||
3704 | static void | |
ce0fc43c | 3705 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
1da177e4 LT |
3706 | { |
3707 | int i; | |
3708 | for (i = 0; i < 4; i++) { | |
3709 | if ((i & deny) != i) | |
ce0fc43c | 3710 | clear_deny(i, stp); |
1da177e4 LT |
3711 | } |
3712 | } | |
3713 | ||
b37ad28b | 3714 | __be32 |
ca364317 BF |
3715 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3716 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3717 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3718 | { |
b37ad28b | 3719 | __be32 status; |
dcef0413 | 3720 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3721 | |
3722 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3723 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3724 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3725 | |
c30e92df | 3726 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
3727 | if (od->od_deleg_want) |
3728 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
3729 | od->od_deleg_want); | |
1da177e4 LT |
3730 | |
3731 | nfs4_lock_state(); | |
c0a5d93e BF |
3732 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3733 | &od->od_stateid, &stp); | |
9072d5c6 | 3734 | if (status) |
1da177e4 | 3735 | goto out; |
1da177e4 | 3736 | status = nfserr_inval; |
82c5ff1b JL |
3737 | if (!test_access(od->od_share_access, stp)) { |
3738 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
1da177e4 LT |
3739 | stp->st_access_bmap, od->od_share_access); |
3740 | goto out; | |
3741 | } | |
ce0fc43c | 3742 | if (!test_deny(od->od_share_deny, stp)) { |
1da177e4 LT |
3743 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
3744 | stp->st_deny_bmap, od->od_share_deny); | |
3745 | goto out; | |
3746 | } | |
6409a5a6 | 3747 | nfs4_stateid_downgrade(stp, od->od_share_access); |
1da177e4 | 3748 | |
ce0fc43c | 3749 | reset_union_bmap_deny(od->od_share_deny, stp); |
1da177e4 | 3750 | |
dcef0413 BF |
3751 | update_stateid(&stp->st_stid.sc_stateid); |
3752 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
3753 | status = nfs_ok; |
3754 | out: | |
5ec094c1 BF |
3755 | if (!cstate->replay_owner) |
3756 | nfs4_unlock_state(); | |
1da177e4 LT |
3757 | return status; |
3758 | } | |
3759 | ||
38c387b5 BF |
3760 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
3761 | { | |
3762 | struct nfs4_openowner *oo; | |
3763 | struct nfs4_ol_stateid *s; | |
3764 | ||
3765 | if (!so->so_is_open_owner) | |
3766 | return; | |
3767 | oo = openowner(so); | |
3768 | s = oo->oo_last_closed_stid; | |
3769 | if (!s) | |
3770 | return; | |
3771 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { | |
3772 | /* Release the last_closed_stid on the next seqid bump: */ | |
3773 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; | |
3774 | return; | |
3775 | } | |
3776 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; | |
f7a4d872 BF |
3777 | release_last_closed_stateid(oo); |
3778 | } | |
3779 | ||
3780 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) | |
3781 | { | |
3782 | unhash_open_stateid(s); | |
3783 | s->st_stid.sc_type = NFS4_CLOSED_STID; | |
38c387b5 BF |
3784 | } |
3785 | ||
1da177e4 LT |
3786 | /* |
3787 | * nfs4_unlock_state() called after encode | |
3788 | */ | |
b37ad28b | 3789 | __be32 |
ca364317 | 3790 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3791 | struct nfsd4_close *close) |
1da177e4 | 3792 | { |
b37ad28b | 3793 | __be32 status; |
fe0750e5 | 3794 | struct nfs4_openowner *oo; |
dcef0413 | 3795 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
3796 | |
3797 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3798 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3799 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3800 | |
3801 | nfs4_lock_state(); | |
f7a4d872 BF |
3802 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
3803 | &close->cl_stateid, | |
3804 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3805 | &stp); | |
9072d5c6 | 3806 | if (status) |
1da177e4 | 3807 | goto out; |
fe0750e5 | 3808 | oo = openowner(stp->st_stateowner); |
1da177e4 | 3809 | status = nfs_ok; |
dcef0413 BF |
3810 | update_stateid(&stp->st_stid.sc_stateid); |
3811 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 | 3812 | |
f7a4d872 | 3813 | nfsd4_close_open_stateid(stp); |
38c387b5 | 3814 | oo->oo_last_closed_stid = stp; |
04ef5954 BF |
3815 | |
3816 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3817 | * released by the laundromat service after the lease period | |
3818 | * to enable us to handle CLOSE replay | |
3819 | */ | |
fe0750e5 BF |
3820 | if (list_empty(&oo->oo_owner.so_stateids)) |
3821 | move_to_close_lru(oo); | |
1da177e4 | 3822 | out: |
5ec094c1 BF |
3823 | if (!cstate->replay_owner) |
3824 | nfs4_unlock_state(); | |
1da177e4 LT |
3825 | return status; |
3826 | } | |
3827 | ||
b37ad28b | 3828 | __be32 |
ca364317 BF |
3829 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3830 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3831 | { |
203a8c8e BF |
3832 | struct nfs4_delegation *dp; |
3833 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 3834 | struct nfs4_stid *s; |
203a8c8e | 3835 | struct inode *inode; |
b37ad28b | 3836 | __be32 status; |
1da177e4 | 3837 | |
ca364317 | 3838 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3839 | return status; |
3840 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3841 | |
3842 | nfs4_lock_state(); | |
38c2f4b1 BF |
3843 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
3844 | if (status) | |
203a8c8e | 3845 | goto out; |
38c2f4b1 | 3846 | dp = delegstateid(s); |
d5477a8d | 3847 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3848 | if (status) |
3849 | goto out; | |
203a8c8e BF |
3850 | |
3851 | unhash_delegation(dp); | |
1da177e4 | 3852 | out: |
203a8c8e BF |
3853 | nfs4_unlock_state(); |
3854 | ||
1da177e4 LT |
3855 | return status; |
3856 | } | |
3857 | ||
3858 | ||
1da177e4 | 3859 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
1da177e4 | 3860 | |
009673b4 BF |
3861 | #define LOCKOWNER_INO_HASH_BITS 8 |
3862 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) | |
3863 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) | |
1da177e4 | 3864 | |
87df4de8 BH |
3865 | static inline u64 |
3866 | end_offset(u64 start, u64 len) | |
3867 | { | |
3868 | u64 end; | |
3869 | ||
3870 | end = start + len; | |
3871 | return end >= start ? end: NFS4_MAX_UINT64; | |
3872 | } | |
3873 | ||
3874 | /* last octet in a range */ | |
3875 | static inline u64 | |
3876 | last_byte_offset(u64 start, u64 len) | |
3877 | { | |
3878 | u64 end; | |
3879 | ||
3880 | BUG_ON(!len); | |
3881 | end = start + len; | |
3882 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3883 | } | |
3884 | ||
009673b4 | 3885 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
1da177e4 LT |
3886 | { |
3887 | return (file_hashval(inode) + cl_id | |
3888 | + opaque_hashval(ownername->data, ownername->len)) | |
009673b4 | 3889 | & LOCKOWNER_INO_HASH_MASK; |
1da177e4 LT |
3890 | } |
3891 | ||
009673b4 | 3892 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
1da177e4 | 3893 | |
1da177e4 LT |
3894 | /* |
3895 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3896 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3897 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3898 | * locking, this prevents us from being completely protocol-compliant. The | |
3899 | * real solution to this problem is to start using unsigned file offsets in | |
3900 | * the VFS, but this is a very deep change! | |
3901 | */ | |
3902 | static inline void | |
3903 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3904 | { | |
3905 | if (lock->fl_start < 0) | |
3906 | lock->fl_start = OFFSET_MAX; | |
3907 | if (lock->fl_end < 0) | |
3908 | lock->fl_end = OFFSET_MAX; | |
3909 | } | |
3910 | ||
d5b9026a N |
3911 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3912 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3913 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3914 | }; |
1da177e4 LT |
3915 | |
3916 | static inline void | |
3917 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3918 | { | |
fe0750e5 | 3919 | struct nfs4_lockowner *lo; |
1da177e4 | 3920 | |
d5b9026a | 3921 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3922 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3923 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3924 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3925 | if (!deny->ld_owner.data) |
3926 | /* We just don't care that much */ | |
3927 | goto nevermind; | |
fe0750e5 BF |
3928 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3929 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3930 | } else { |
7c13f344 BF |
3931 | nevermind: |
3932 | deny->ld_owner.len = 0; | |
3933 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3934 | deny->ld_clientid.cl_boot = 0; |
3935 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3936 | } |
3937 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3938 | deny->ld_length = NFS4_MAX_UINT64; |
3939 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3940 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3941 | deny->ld_type = NFS4_READ_LT; | |
3942 | if (fl->fl_type != F_RDLCK) | |
3943 | deny->ld_type = NFS4_WRITE_LT; | |
3944 | } | |
3945 | ||
b93d87c1 BF |
3946 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
3947 | { | |
3948 | struct nfs4_ol_stateid *lst; | |
3949 | ||
3950 | if (!same_owner_str(&lo->lo_owner, owner, clid)) | |
3951 | return false; | |
3952 | lst = list_first_entry(&lo->lo_owner.so_stateids, | |
3953 | struct nfs4_ol_stateid, st_perstateowner); | |
3954 | return lst->st_file->fi_inode == inode; | |
3955 | } | |
3956 | ||
fe0750e5 BF |
3957 | static struct nfs4_lockowner * |
3958 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3959 | struct xdr_netobj *owner) |
3960 | { | |
009673b4 | 3961 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
b93d87c1 | 3962 | struct nfs4_lockowner *lo; |
1da177e4 | 3963 | |
009673b4 | 3964 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
b93d87c1 BF |
3965 | if (same_lockowner_ino(lo, inode, clid, owner)) |
3966 | return lo; | |
1da177e4 LT |
3967 | } |
3968 | return NULL; | |
3969 | } | |
3970 | ||
dcef0413 | 3971 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
ff194bd9 | 3972 | { |
009673b4 BF |
3973 | struct inode *inode = open_stp->st_file->fi_inode; |
3974 | unsigned int inohash = lockowner_ino_hashval(inode, | |
3975 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); | |
3976 | ||
16bfdaaf | 3977 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
009673b4 | 3978 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
fe0750e5 | 3979 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
ff194bd9 BF |
3980 | } |
3981 | ||
1da177e4 LT |
3982 | /* |
3983 | * Alloc a lock owner structure. | |
3984 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3985 | * occurred. |
1da177e4 | 3986 | * |
16bfdaaf | 3987 | * strhashval = ownerstr_hashval |
1da177e4 LT |
3988 | */ |
3989 | ||
fe0750e5 | 3990 | static struct nfs4_lockowner * |
dcef0413 | 3991 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3992 | struct nfs4_lockowner *lo; |
1da177e4 | 3993 | |
fe0750e5 BF |
3994 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3995 | if (!lo) | |
1da177e4 | 3996 | return NULL; |
fe0750e5 BF |
3997 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3998 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3999 | /* It is the openowner seqid that will be incremented in encode in the |
4000 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
4001 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
4002 | hash_lockowner(lo, strhashval, clp, open_stp); | |
4003 | return lo; | |
1da177e4 LT |
4004 | } |
4005 | ||
dcef0413 BF |
4006 | static struct nfs4_ol_stateid * |
4007 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 4008 | { |
dcef0413 | 4009 | struct nfs4_ol_stateid *stp; |
d3b313a4 | 4010 | struct nfs4_client *clp = lo->lo_owner.so_client; |
1da177e4 | 4011 | |
996e0938 | 4012 | stp = nfs4_alloc_stateid(clp); |
5ac049ac | 4013 | if (stp == NULL) |
6136d2b4 | 4014 | return NULL; |
996e0938 | 4015 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
8beefa24 | 4016 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
4017 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
4018 | stp->st_stateowner = &lo->lo_owner; | |
13cd2184 | 4019 | get_nfs4_file(fp); |
1da177e4 | 4020 | stp->st_file = fp; |
0997b173 | 4021 | stp->st_access_bmap = 0; |
1da177e4 | 4022 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 4023 | stp->st_openstp = open_stp; |
1da177e4 LT |
4024 | return stp; |
4025 | } | |
4026 | ||
fd39ca9a | 4027 | static int |
1da177e4 LT |
4028 | check_lock_length(u64 offset, u64 length) |
4029 | { | |
87df4de8 | 4030 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
4031 | LOFF_OVERFLOW(offset, length))); |
4032 | } | |
4033 | ||
dcef0413 | 4034 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 BF |
4035 | { |
4036 | struct nfs4_file *fp = lock_stp->st_file; | |
4037 | int oflag = nfs4_access_to_omode(access); | |
4038 | ||
82c5ff1b | 4039 | if (test_access(access, lock_stp)) |
0997b173 BF |
4040 | return; |
4041 | nfs4_file_get_access(fp, oflag); | |
82c5ff1b | 4042 | set_access(access, lock_stp); |
0997b173 BF |
4043 | } |
4044 | ||
2355c596 | 4045 | 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 |
4046 | { |
4047 | struct nfs4_file *fi = ost->st_file; | |
4048 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
4049 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
4050 | struct nfs4_lockowner *lo; | |
4051 | unsigned int strhashval; | |
4052 | ||
4053 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); | |
4054 | if (lo) { | |
4055 | if (!cstate->minorversion) | |
4056 | return nfserr_bad_seqid; | |
4057 | /* XXX: a lockowner always has exactly one stateid: */ | |
4058 | *lst = list_first_entry(&lo->lo_owner.so_stateids, | |
4059 | struct nfs4_ol_stateid, st_perstateowner); | |
4060 | return nfs_ok; | |
4061 | } | |
16bfdaaf | 4062 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
64a284d0 BF |
4063 | &lock->v.new.owner); |
4064 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); | |
4065 | if (lo == NULL) | |
4066 | return nfserr_jukebox; | |
4067 | *lst = alloc_init_lock_stateid(lo, fi, ost); | |
4068 | if (*lst == NULL) { | |
4069 | release_lockowner(lo); | |
4070 | return nfserr_jukebox; | |
4071 | } | |
4072 | *new = true; | |
4073 | return nfs_ok; | |
4074 | } | |
4075 | ||
1da177e4 LT |
4076 | /* |
4077 | * LOCK operation | |
4078 | */ | |
b37ad28b | 4079 | __be32 |
ca364317 | 4080 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4081 | struct nfsd4_lock *lock) |
1da177e4 | 4082 | { |
fe0750e5 BF |
4083 | struct nfs4_openowner *open_sop = NULL; |
4084 | struct nfs4_lockowner *lock_sop = NULL; | |
dcef0413 | 4085 | struct nfs4_ol_stateid *lock_stp; |
7d947842 | 4086 | struct file *filp = NULL; |
1da177e4 | 4087 | struct file_lock file_lock; |
8dc7c311 | 4088 | struct file_lock conflock; |
b37ad28b | 4089 | __be32 status = 0; |
64a284d0 | 4090 | bool new_state = false; |
b34f27aa | 4091 | int lkflg; |
b8dd7b9a | 4092 | int err; |
1da177e4 LT |
4093 | |
4094 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
4095 | (long long) lock->lk_offset, | |
4096 | (long long) lock->lk_length); | |
4097 | ||
1da177e4 LT |
4098 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
4099 | return nfserr_inval; | |
4100 | ||
ca364317 | 4101 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 4102 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
4103 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4104 | return status; | |
4105 | } | |
4106 | ||
1da177e4 LT |
4107 | nfs4_lock_state(); |
4108 | ||
4109 | if (lock->lk_is_new) { | |
893f8770 N |
4110 | /* |
4111 | * Client indicates that this is a new lockowner. | |
4112 | * Use open owner and open stateid to create lock owner and | |
4113 | * lock stateid. | |
4114 | */ | |
dcef0413 | 4115 | struct nfs4_ol_stateid *open_stp = NULL; |
684e5638 BF |
4116 | |
4117 | if (nfsd4_has_session(cstate)) | |
4118 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
4119 | memcpy(&lock->v.new.clientid, | |
4120 | &cstate->session->se_client->cl_clientid, | |
4121 | sizeof(clientid_t)); | |
4122 | ||
1da177e4 | 4123 | status = nfserr_stale_clientid; |
684e5638 | 4124 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 4125 | goto out; |
1da177e4 | 4126 | |
1da177e4 | 4127 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 4128 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
4129 | lock->lk_new_open_seqid, |
4130 | &lock->lk_new_open_stateid, | |
c0a5d93e | 4131 | &open_stp); |
37515177 | 4132 | if (status) |
1da177e4 | 4133 | goto out; |
fe0750e5 | 4134 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 4135 | status = nfserr_bad_stateid; |
684e5638 | 4136 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
4137 | &lock->v.new.clientid)) |
4138 | goto out; | |
64a284d0 BF |
4139 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
4140 | &lock_stp, &new_state); | |
4141 | if (status) | |
1da177e4 | 4142 | goto out; |
1da177e4 LT |
4143 | } else { |
4144 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4145 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
4146 | lock->lk_old_lock_seqid, |
4147 | &lock->lk_old_lock_stateid, | |
2288d0e3 | 4148 | NFS4_LOCK_STID, &lock_stp); |
1da177e4 LT |
4149 | if (status) |
4150 | goto out; | |
4151 | } | |
64a284d0 | 4152 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 4153 | |
b34f27aa BF |
4154 | lkflg = setlkflg(lock->lk_type); |
4155 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4156 | if (status) | |
4157 | goto out; | |
4158 | ||
0dd395dc | 4159 | status = nfserr_grace; |
af558e33 | 4160 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4161 | goto out; |
4162 | status = nfserr_no_grace; | |
af558e33 | 4163 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4164 | goto out; |
4165 | ||
1da177e4 LT |
4166 | locks_init_lock(&file_lock); |
4167 | switch (lock->lk_type) { | |
4168 | case NFS4_READ_LT: | |
4169 | case NFS4_READW_LT: | |
0997b173 BF |
4170 | filp = find_readable_file(lock_stp->st_file); |
4171 | if (filp) | |
4172 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4173 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4174 | break; |
1da177e4 LT |
4175 | case NFS4_WRITE_LT: |
4176 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4177 | filp = find_writeable_file(lock_stp->st_file); |
4178 | if (filp) | |
4179 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4180 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4181 | break; |
1da177e4 LT |
4182 | default: |
4183 | status = nfserr_inval; | |
4184 | goto out; | |
4185 | } | |
f9d7562f BF |
4186 | if (!filp) { |
4187 | status = nfserr_openmode; | |
4188 | goto out; | |
4189 | } | |
b59e3c0e | 4190 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4191 | file_lock.fl_pid = current->tgid; |
4192 | file_lock.fl_file = filp; | |
4193 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4194 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4195 | |
4196 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4197 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4198 | nfs4_transform_lock_offset(&file_lock); |
4199 | ||
4200 | /* | |
4201 | * Try to lock the file in the VFS. | |
4202 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4203 | */ | |
4204 | ||
529d7b2a | 4205 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4206 | switch (-err) { |
1da177e4 | 4207 | case 0: /* success! */ |
dcef0413 BF |
4208 | update_stateid(&lock_stp->st_stid.sc_stateid); |
4209 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, | |
1da177e4 | 4210 | sizeof(stateid_t)); |
b8dd7b9a | 4211 | status = 0; |
eb76b3fd AA |
4212 | break; |
4213 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4214 | status = nfserr_denied; | |
4215 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4216 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4217 | break; | |
1da177e4 LT |
4218 | case (EDEADLK): |
4219 | status = nfserr_deadlock; | |
eb76b3fd | 4220 | break; |
3e772463 | 4221 | default: |
fd85b817 | 4222 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4223 | status = nfserrno(err); |
eb76b3fd | 4224 | break; |
1da177e4 | 4225 | } |
1da177e4 | 4226 | out: |
64a284d0 | 4227 | if (status && new_state) |
f044ff83 | 4228 | release_lockowner(lock_sop); |
5ec094c1 BF |
4229 | if (!cstate->replay_owner) |
4230 | nfs4_unlock_state(); | |
1da177e4 LT |
4231 | return status; |
4232 | } | |
4233 | ||
55ef1274 BF |
4234 | /* |
4235 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4236 | * so we do a temporary open here just to get an open file to pass to | |
4237 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4238 | * inode operation.) | |
4239 | */ | |
4240 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4241 | { | |
4242 | struct file *file; | |
4243 | int err; | |
4244 | ||
4245 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4246 | if (err) | |
4247 | return err; | |
4248 | err = vfs_test_lock(file, lock); | |
4249 | nfsd_close(file); | |
4250 | return err; | |
4251 | } | |
4252 | ||
1da177e4 LT |
4253 | /* |
4254 | * LOCKT operation | |
4255 | */ | |
b37ad28b | 4256 | __be32 |
ca364317 BF |
4257 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4258 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4259 | { |
4260 | struct inode *inode; | |
1da177e4 | 4261 | struct file_lock file_lock; |
fe0750e5 | 4262 | struct nfs4_lockowner *lo; |
fd85b817 | 4263 | int error; |
b37ad28b | 4264 | __be32 status; |
1da177e4 | 4265 | |
af558e33 | 4266 | if (locks_in_grace()) |
1da177e4 LT |
4267 | return nfserr_grace; |
4268 | ||
4269 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4270 | return nfserr_inval; | |
4271 | ||
1da177e4 LT |
4272 | nfs4_lock_state(); |
4273 | ||
4274 | status = nfserr_stale_clientid; | |
60adfc50 | 4275 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4276 | goto out; |
1da177e4 | 4277 | |
75c096f7 | 4278 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4279 | goto out; |
1da177e4 | 4280 | |
ca364317 | 4281 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4282 | locks_init_lock(&file_lock); |
4283 | switch (lockt->lt_type) { | |
4284 | case NFS4_READ_LT: | |
4285 | case NFS4_READW_LT: | |
4286 | file_lock.fl_type = F_RDLCK; | |
4287 | break; | |
4288 | case NFS4_WRITE_LT: | |
4289 | case NFS4_WRITEW_LT: | |
4290 | file_lock.fl_type = F_WRLCK; | |
4291 | break; | |
4292 | default: | |
2fdada03 | 4293 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4294 | status = nfserr_inval; |
4295 | goto out; | |
4296 | } | |
4297 | ||
fe0750e5 BF |
4298 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4299 | if (lo) | |
4300 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4301 | file_lock.fl_pid = current->tgid; |
4302 | file_lock.fl_flags = FL_POSIX; | |
4303 | ||
4304 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4305 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4306 | |
4307 | nfs4_transform_lock_offset(&file_lock); | |
4308 | ||
1da177e4 | 4309 | status = nfs_ok; |
55ef1274 | 4310 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4311 | if (error) { |
4312 | status = nfserrno(error); | |
4313 | goto out; | |
4314 | } | |
9d6a8c5c | 4315 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4316 | status = nfserr_denied; |
9d6a8c5c | 4317 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4318 | } |
4319 | out: | |
4320 | nfs4_unlock_state(); | |
4321 | return status; | |
4322 | } | |
4323 | ||
b37ad28b | 4324 | __be32 |
ca364317 | 4325 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4326 | struct nfsd4_locku *locku) |
1da177e4 | 4327 | { |
dcef0413 | 4328 | struct nfs4_ol_stateid *stp; |
1da177e4 LT |
4329 | struct file *filp = NULL; |
4330 | struct file_lock file_lock; | |
b37ad28b | 4331 | __be32 status; |
b8dd7b9a | 4332 | int err; |
1da177e4 LT |
4333 | |
4334 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4335 | (long long) locku->lu_offset, | |
4336 | (long long) locku->lu_length); | |
4337 | ||
4338 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4339 | return nfserr_inval; | |
4340 | ||
4341 | nfs4_lock_state(); | |
4342 | ||
9072d5c6 | 4343 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
2288d0e3 | 4344 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
9072d5c6 | 4345 | if (status) |
1da177e4 | 4346 | goto out; |
f9d7562f BF |
4347 | filp = find_any_file(stp->st_file); |
4348 | if (!filp) { | |
4349 | status = nfserr_lock_range; | |
4350 | goto out; | |
4351 | } | |
1da177e4 LT |
4352 | BUG_ON(!filp); |
4353 | locks_init_lock(&file_lock); | |
4354 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4355 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4356 | file_lock.fl_pid = current->tgid; |
4357 | file_lock.fl_file = filp; | |
4358 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4359 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4360 | file_lock.fl_start = locku->lu_offset; |
4361 | ||
87df4de8 | 4362 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4363 | nfs4_transform_lock_offset(&file_lock); |
4364 | ||
4365 | /* | |
4366 | * Try to unlock the file in the VFS. | |
4367 | */ | |
fd85b817 | 4368 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4369 | if (err) { |
fd85b817 | 4370 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4371 | goto out_nfserr; |
4372 | } | |
4373 | /* | |
4374 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4375 | */ | |
dcef0413 BF |
4376 | update_stateid(&stp->st_stid.sc_stateid); |
4377 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); | |
1da177e4 LT |
4378 | |
4379 | out: | |
71c3bcd7 BF |
4380 | if (!cstate->replay_owner) |
4381 | nfs4_unlock_state(); | |
1da177e4 LT |
4382 | return status; |
4383 | ||
4384 | out_nfserr: | |
b8dd7b9a | 4385 | status = nfserrno(err); |
1da177e4 LT |
4386 | goto out; |
4387 | } | |
4388 | ||
4389 | /* | |
4390 | * returns | |
4391 | * 1: locks held by lockowner | |
4392 | * 0: no locks held by lockowner | |
4393 | */ | |
4394 | static int | |
fe0750e5 | 4395 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4396 | { |
4397 | struct file_lock **flpp; | |
f9d7562f | 4398 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4399 | int status = 0; |
4400 | ||
b89f4321 | 4401 | lock_flocks(); |
1da177e4 | 4402 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4403 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4404 | status = 1; |
4405 | goto out; | |
796dadfd | 4406 | } |
1da177e4 LT |
4407 | } |
4408 | out: | |
b89f4321 | 4409 | unlock_flocks(); |
1da177e4 LT |
4410 | return status; |
4411 | } | |
4412 | ||
b37ad28b | 4413 | __be32 |
b591480b BF |
4414 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4415 | struct nfsd4_compound_state *cstate, | |
4416 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4417 | { |
4418 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4419 | struct nfs4_stateowner *sop; |
fe0750e5 | 4420 | struct nfs4_lockowner *lo; |
dcef0413 | 4421 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4422 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe | 4423 | struct list_head matches; |
16bfdaaf | 4424 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
b37ad28b | 4425 | __be32 status; |
1da177e4 LT |
4426 | |
4427 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4428 | clid->cl_boot, clid->cl_id); | |
4429 | ||
4430 | /* XXX check for lease expiration */ | |
4431 | ||
4432 | status = nfserr_stale_clientid; | |
849823c5 | 4433 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4434 | return status; |
1da177e4 LT |
4435 | |
4436 | nfs4_lock_state(); | |
4437 | ||
3e9e3dbe | 4438 | status = nfserr_locks_held; |
3e9e3dbe | 4439 | INIT_LIST_HEAD(&matches); |
06f1f864 | 4440 | |
16bfdaaf BF |
4441 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
4442 | if (sop->so_is_open_owner) | |
4443 | continue; | |
06f1f864 BF |
4444 | if (!same_owner_str(sop, owner, clid)) |
4445 | continue; | |
4446 | list_for_each_entry(stp, &sop->so_stateids, | |
4447 | st_perstateowner) { | |
4448 | lo = lockowner(sop); | |
4449 | if (check_for_locks(stp->st_file, lo)) | |
4450 | goto out; | |
4451 | list_add(&lo->lo_list, &matches); | |
1da177e4 | 4452 | } |
3e9e3dbe N |
4453 | } |
4454 | /* Clients probably won't expect us to return with some (but not all) | |
4455 | * of the lockowner state released; so don't release any until all | |
4456 | * have been checked. */ | |
4457 | status = nfs_ok; | |
0fa822e4 | 4458 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4459 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4460 | lo_list); | |
0fa822e4 N |
4461 | /* unhash_stateowner deletes so_perclient only |
4462 | * for openowners. */ | |
fe0750e5 BF |
4463 | list_del(&lo->lo_list); |
4464 | release_lockowner(lo); | |
1da177e4 LT |
4465 | } |
4466 | out: | |
4467 | nfs4_unlock_state(); | |
4468 | return status; | |
4469 | } | |
4470 | ||
4471 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4472 | alloc_reclaim(void) |
1da177e4 | 4473 | { |
a55370a3 | 4474 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4475 | } |
4476 | ||
c7b9a459 | 4477 | int |
a1bcecd2 | 4478 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4479 | { |
4480 | unsigned int strhashval = clientstr_hashval(name); | |
4481 | struct nfs4_client *clp; | |
4482 | ||
e203d506 | 4483 | clp = find_confirmed_client_by_str(name, strhashval); |
393d8ed8 BF |
4484 | if (!clp) |
4485 | return 0; | |
a52d726b | 4486 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
c7b9a459 N |
4487 | } |
4488 | ||
1da177e4 LT |
4489 | /* |
4490 | * failure => all reset bets are off, nfserr_no_grace... | |
4491 | */ | |
190e4fbf N |
4492 | int |
4493 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4494 | { |
4495 | unsigned int strhashval; | |
4496 | struct nfs4_client_reclaim *crp = NULL; | |
4497 | ||
a55370a3 N |
4498 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4499 | crp = alloc_reclaim(); | |
1da177e4 LT |
4500 | if (!crp) |
4501 | return 0; | |
a55370a3 | 4502 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4503 | INIT_LIST_HEAD(&crp->cr_strhash); |
4504 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4505 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4506 | reclaim_str_hashtbl_size++; |
4507 | return 1; | |
4508 | } | |
4509 | ||
2a4317c5 | 4510 | void |
1da177e4 LT |
4511 | nfs4_release_reclaim(void) |
4512 | { | |
4513 | struct nfs4_client_reclaim *crp = NULL; | |
4514 | int i; | |
4515 | ||
1da177e4 LT |
4516 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4517 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4518 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4519 | struct nfs4_client_reclaim, cr_strhash); | |
4520 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4521 | kfree(crp); |
4522 | reclaim_str_hashtbl_size--; | |
4523 | } | |
4524 | } | |
4525 | BUG_ON(reclaim_str_hashtbl_size); | |
4526 | } | |
4527 | ||
4528 | /* | |
4529 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 4530 | struct nfs4_client_reclaim * |
a52d726b | 4531 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
1da177e4 LT |
4532 | { |
4533 | unsigned int strhashval; | |
1da177e4 LT |
4534 | struct nfs4_client_reclaim *crp = NULL; |
4535 | ||
a55370a3 N |
4536 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4537 | clp->cl_name.len, clp->cl_name.data, | |
4538 | clp->cl_recdir); | |
1da177e4 LT |
4539 | |
4540 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4541 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4542 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4543 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4544 | return crp; |
4545 | } | |
4546 | } | |
4547 | return NULL; | |
4548 | } | |
4549 | ||
4550 | /* | |
4551 | * Called from OPEN. Look for clientid in reclaim list. | |
4552 | */ | |
b37ad28b | 4553 | __be32 |
1da177e4 LT |
4554 | nfs4_check_open_reclaim(clientid_t *clid) |
4555 | { | |
a52d726b JL |
4556 | struct nfs4_client *clp; |
4557 | ||
4558 | /* find clientid in conf_id_hashtbl */ | |
4559 | clp = find_confirmed_client(clid); | |
4560 | if (clp == NULL) | |
4561 | return nfserr_reclaim_bad; | |
4562 | ||
4563 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; | |
1da177e4 LT |
4564 | } |
4565 | ||
65178db4 BS |
4566 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
4567 | ||
4568 | void nfsd_forget_clients(u64 num) | |
4569 | { | |
4570 | struct nfs4_client *clp, *next; | |
4571 | int count = 0; | |
4572 | ||
4573 | nfs4_lock_state(); | |
4574 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { | |
2a4317c5 | 4575 | nfsd4_client_record_remove(clp); |
65178db4 BS |
4576 | expire_client(clp); |
4577 | if (++count == num) | |
4578 | break; | |
4579 | } | |
4580 | nfs4_unlock_state(); | |
4581 | ||
4582 | printk(KERN_INFO "NFSD: Forgot %d clients", count); | |
4583 | } | |
4584 | ||
4585 | static void release_lockowner_sop(struct nfs4_stateowner *sop) | |
4586 | { | |
4587 | release_lockowner(lockowner(sop)); | |
4588 | } | |
4589 | ||
4590 | static void release_openowner_sop(struct nfs4_stateowner *sop) | |
4591 | { | |
4592 | release_openowner(openowner(sop)); | |
4593 | } | |
4594 | ||
353de31b | 4595 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
65178db4 BS |
4596 | void (*release_sop)(struct nfs4_stateowner *)) |
4597 | { | |
4598 | int i, count = 0; | |
4599 | struct nfs4_stateowner *sop, *next; | |
4600 | ||
16bfdaaf BF |
4601 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4602 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { | |
4603 | if (sop->so_is_open_owner != is_open_owner) | |
4604 | continue; | |
65178db4 BS |
4605 | release_sop(sop); |
4606 | if (++count == num) | |
4607 | return count; | |
4608 | } | |
4609 | } | |
4610 | return count; | |
4611 | } | |
4612 | ||
4613 | void nfsd_forget_locks(u64 num) | |
4614 | { | |
4615 | int count; | |
4616 | ||
4617 | nfs4_lock_state(); | |
16bfdaaf | 4618 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
65178db4 BS |
4619 | nfs4_unlock_state(); |
4620 | ||
4621 | printk(KERN_INFO "NFSD: Forgot %d locks", count); | |
4622 | } | |
4623 | ||
4624 | void nfsd_forget_openowners(u64 num) | |
4625 | { | |
4626 | int count; | |
4627 | ||
4628 | nfs4_lock_state(); | |
16bfdaaf | 4629 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
65178db4 BS |
4630 | nfs4_unlock_state(); |
4631 | ||
4632 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); | |
4633 | } | |
4634 | ||
4635 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) | |
4636 | { | |
4637 | int i, count = 0; | |
2d3475c0 BS |
4638 | struct nfs4_file *fp, *fnext; |
4639 | struct nfs4_delegation *dp, *dnext; | |
65178db4 BS |
4640 | |
4641 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
2d3475c0 BS |
4642 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
4643 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { | |
65178db4 BS |
4644 | deleg_func(dp); |
4645 | if (++count == num) | |
4646 | return count; | |
4647 | } | |
4648 | } | |
4649 | } | |
2d3475c0 | 4650 | |
65178db4 BS |
4651 | return count; |
4652 | } | |
4653 | ||
4654 | void nfsd_forget_delegations(u64 num) | |
4655 | { | |
4656 | unsigned int count; | |
4657 | ||
4658 | nfs4_lock_state(); | |
4659 | count = nfsd_process_n_delegations(num, unhash_delegation); | |
4660 | nfs4_unlock_state(); | |
4661 | ||
4662 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); | |
4663 | } | |
4664 | ||
4665 | void nfsd_recall_delegations(u64 num) | |
4666 | { | |
4667 | unsigned int count; | |
4668 | ||
4669 | nfs4_lock_state(); | |
4670 | spin_lock(&recall_lock); | |
4671 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); | |
4672 | spin_unlock(&recall_lock); | |
4673 | nfs4_unlock_state(); | |
4674 | ||
4675 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); | |
4676 | } | |
4677 | ||
4678 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ | |
4679 | ||
ac4d8ff2 | 4680 | /* initialization to perform at module load time: */ |
1da177e4 | 4681 | |
72083396 | 4682 | void |
ac4d8ff2 | 4683 | nfs4_state_init(void) |
1da177e4 | 4684 | { |
72083396 | 4685 | int i; |
1da177e4 | 4686 | |
1da177e4 LT |
4687 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4688 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4689 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4690 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4691 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4692 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4693 | } |
5282fd72 ME |
4694 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4695 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4696 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4697 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4698 | } | |
16bfdaaf BF |
4699 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
4700 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
1da177e4 | 4701 | } |
009673b4 BF |
4702 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
4703 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); | |
1da177e4 LT |
4704 | INIT_LIST_HEAD(&close_lru); |
4705 | INIT_LIST_HEAD(&client_lru); | |
4706 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4707 | reclaim_str_hashtbl_size = 0; |
ac4d8ff2 N |
4708 | } |
4709 | ||
c2f1a551 MS |
4710 | /* |
4711 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4712 | * client may quite reasonably hang on to a delegation as long as it has | |
4713 | * the inode cached. This becomes an obvious problem the first time a | |
4714 | * client's inode cache approaches the size of the server's total memory. | |
4715 | * | |
4716 | * For now we avoid this problem by imposing a hard limit on the number | |
4717 | * of delegations, which varies according to the server's memory size. | |
4718 | */ | |
4719 | static void | |
4720 | set_max_delegations(void) | |
4721 | { | |
4722 | /* | |
4723 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4724 | * estimates suggest that in the worst case (where every delegation | |
4725 | * is for a different inode), a delegation could take about 1.5K, | |
4726 | * giving a worst case usage of about 6% of memory. | |
4727 | */ | |
4728 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4729 | } | |
4730 | ||
ac4d8ff2 N |
4731 | /* initialization to perform when the nfsd service is started: */ |
4732 | ||
a6d6b781 JL |
4733 | int |
4734 | nfs4_state_start(void) | |
ac4d8ff2 | 4735 | { |
b5a1a81e BF |
4736 | int ret; |
4737 | ||
2a4317c5 JL |
4738 | /* |
4739 | * FIXME: For now, we hang most of the pernet global stuff off of | |
4740 | * init_net until nfsd is fully containerized. Eventually, we'll | |
4741 | * need to pass a net pointer into this function, take a reference | |
4742 | * to that instead and then do most of the rest of this on a per-net | |
4743 | * basis. | |
4744 | */ | |
4745 | get_net(&init_net); | |
4746 | nfsd4_client_tracking_init(&init_net); | |
1da177e4 | 4747 | boot_time = get_seconds(); |
af558e33 | 4748 | locks_start_grace(&nfsd4_manager); |
33dcc481 | 4749 | grace_ended = false; |
9a8db97e | 4750 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4751 | nfsd4_grace); |
b5a1a81e | 4752 | ret = set_callback_cred(); |
a6d6b781 JL |
4753 | if (ret) { |
4754 | ret = -ENOMEM; | |
4755 | goto out_recovery; | |
4756 | } | |
58da282b | 4757 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
a6d6b781 JL |
4758 | if (laundry_wq == NULL) { |
4759 | ret = -ENOMEM; | |
4760 | goto out_recovery; | |
4761 | } | |
b5a1a81e BF |
4762 | ret = nfsd4_create_callback_queue(); |
4763 | if (ret) | |
4764 | goto out_free_laundry; | |
e46b498c | 4765 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4766 | set_max_delegations(); |
b5a1a81e BF |
4767 | return 0; |
4768 | out_free_laundry: | |
4769 | destroy_workqueue(laundry_wq); | |
a6d6b781 | 4770 | out_recovery: |
2a4317c5 JL |
4771 | nfsd4_client_tracking_exit(&init_net); |
4772 | put_net(&init_net); | |
b5a1a81e | 4773 | return ret; |
1da177e4 LT |
4774 | } |
4775 | ||
1da177e4 LT |
4776 | static void |
4777 | __nfs4_state_shutdown(void) | |
4778 | { | |
4779 | int i; | |
4780 | struct nfs4_client *clp = NULL; | |
4781 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4782 | struct list_head *pos, *next, reaplist; |
4783 | ||
1da177e4 LT |
4784 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4785 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4786 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4787 | expire_client(clp); | |
4788 | } | |
4789 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4790 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4791 | expire_client(clp); | |
4792 | } | |
4793 | } | |
4794 | INIT_LIST_HEAD(&reaplist); | |
4795 | spin_lock(&recall_lock); | |
4796 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4797 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4798 | list_move(&dp->dl_recall_lru, &reaplist); | |
4799 | } | |
4800 | spin_unlock(&recall_lock); | |
4801 | list_for_each_safe(pos, next, &reaplist) { | |
4802 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1da177e4 LT |
4803 | unhash_delegation(dp); |
4804 | } | |
4805 | ||
2a4317c5 JL |
4806 | nfsd4_client_tracking_exit(&init_net); |
4807 | put_net(&init_net); | |
1da177e4 LT |
4808 | } |
4809 | ||
4810 | void | |
4811 | nfs4_state_shutdown(void) | |
4812 | { | |
afe2c511 | 4813 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4814 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4815 | locks_end_grace(&nfsd4_manager); |
1da177e4 | 4816 | nfs4_lock_state(); |
1da177e4 | 4817 | __nfs4_state_shutdown(); |
1da177e4 | 4818 | nfs4_unlock_state(); |
c3935e30 | 4819 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4820 | } |
8b70484c TM |
4821 | |
4822 | static void | |
4823 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4824 | { | |
37c593c5 TM |
4825 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
4826 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); | |
8b70484c TM |
4827 | } |
4828 | ||
4829 | static void | |
4830 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
4831 | { | |
37c593c5 TM |
4832 | if (cstate->minorversion) { |
4833 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
4834 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
4835 | } | |
4836 | } | |
4837 | ||
4838 | void | |
4839 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
4840 | { | |
4841 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); | |
8b70484c TM |
4842 | } |
4843 | ||
62cd4a59 TM |
4844 | /* |
4845 | * functions to set current state id | |
4846 | */ | |
9428fe1a TM |
4847 | void |
4848 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4849 | { | |
4850 | put_stateid(cstate, &odp->od_stateid); | |
4851 | } | |
4852 | ||
8b70484c TM |
4853 | void |
4854 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) | |
4855 | { | |
4856 | put_stateid(cstate, &open->op_stateid); | |
4857 | } | |
4858 | ||
62cd4a59 TM |
4859 | void |
4860 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4861 | { | |
4862 | put_stateid(cstate, &close->cl_stateid); | |
4863 | } | |
4864 | ||
4865 | void | |
4866 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) | |
4867 | { | |
4868 | put_stateid(cstate, &lock->lk_resp_stateid); | |
4869 | } | |
4870 | ||
4871 | /* | |
4872 | * functions to consume current state id | |
4873 | */ | |
1e97b519 | 4874 | |
9428fe1a TM |
4875 | void |
4876 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) | |
4877 | { | |
4878 | get_stateid(cstate, &odp->od_stateid); | |
4879 | } | |
4880 | ||
4881 | void | |
4882 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) | |
4883 | { | |
4884 | get_stateid(cstate, &drp->dr_stateid); | |
4885 | } | |
4886 | ||
1e97b519 TM |
4887 | void |
4888 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) | |
4889 | { | |
4890 | get_stateid(cstate, &fsp->fr_stateid); | |
4891 | } | |
4892 | ||
4893 | void | |
4894 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) | |
4895 | { | |
4896 | get_stateid(cstate, &setattr->sa_stateid); | |
4897 | } | |
4898 | ||
8b70484c TM |
4899 | void |
4900 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) | |
4901 | { | |
4902 | get_stateid(cstate, &close->cl_stateid); | |
4903 | } | |
4904 | ||
4905 | void | |
62cd4a59 | 4906 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
8b70484c | 4907 | { |
62cd4a59 | 4908 | get_stateid(cstate, &locku->lu_stateid); |
8b70484c | 4909 | } |
30813e27 TM |
4910 | |
4911 | void | |
4912 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) | |
4913 | { | |
4914 | get_stateid(cstate, &read->rd_stateid); | |
4915 | } | |
4916 | ||
4917 | void | |
4918 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) | |
4919 | { | |
4920 | get_stateid(cstate, &write->wr_stateid); | |
4921 | } |